^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) drbd_int.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) This file is part of DRBD by Philipp Reisner and Lars Ellenberg.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) Copyright (C) 2001-2008, LINBIT Information Technologies GmbH.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #ifndef _DRBD_INT_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define _DRBD_INT_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <crypto/hash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/compiler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/sched/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/ratelimit.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/tcp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/major.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/blkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/backing-dev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/genhd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/idr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/dynamic_debug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <net/tcp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/lru_cache.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <linux/prefetch.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/drbd_genl_api.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/drbd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include "drbd_strings.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include "drbd_state.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include "drbd_protocol.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #ifdef __CHECKER__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) # define __protected_by(x) __attribute__((require_context(x,1,999,"rdwr")))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) # define __protected_read_by(x) __attribute__((require_context(x,1,999,"read")))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) # define __protected_write_by(x) __attribute__((require_context(x,1,999,"write")))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) # define __protected_by(x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) # define __protected_read_by(x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) # define __protected_write_by(x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) /* shared module parameters, defined in drbd_main.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #ifdef CONFIG_DRBD_FAULT_INJECTION
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) extern int drbd_enable_faults;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) extern int drbd_fault_rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) extern unsigned int drbd_minor_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) extern char drbd_usermode_helper[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) extern int drbd_proc_details;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) /* This is used to stop/restart our threads.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * Cannot use SIGTERM nor SIGKILL, since these
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * are sent out by init on runlevel changes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * I choose SIGHUP for now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #define DRBD_SIGKILL SIGHUP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #define ID_IN_SYNC (4711ULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #define ID_OUT_OF_SYNC (4712ULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) #define ID_SYNCER (-1ULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) #define UUID_NEW_BM_OFFSET ((u64)0x0001000000000000ULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) struct drbd_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct drbd_connection;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) #define __drbd_printk_device(level, device, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) dev_printk(level, disk_to_dev((device)->vdisk), fmt, ## args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) #define __drbd_printk_peer_device(level, peer_device, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) dev_printk(level, disk_to_dev((peer_device)->device->vdisk), fmt, ## args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) #define __drbd_printk_resource(level, resource, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) printk(level "drbd %s: " fmt, (resource)->name, ## args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) #define __drbd_printk_connection(level, connection, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) printk(level "drbd %s: " fmt, (connection)->resource->name, ## args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) void drbd_printk_with_wrong_object_type(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) #define __drbd_printk_if_same_type(obj, type, func, level, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) (__builtin_types_compatible_p(typeof(obj), type) || \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) __builtin_types_compatible_p(typeof(obj), const type)), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) func(level, (const type)(obj), fmt, ## args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) #define drbd_printk(level, obj, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) __builtin_choose_expr( \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) __drbd_printk_if_same_type(obj, struct drbd_device *, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) __drbd_printk_device, level, fmt, ## args), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) __builtin_choose_expr( \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) __drbd_printk_if_same_type(obj, struct drbd_resource *, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) __drbd_printk_resource, level, fmt, ## args), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) __builtin_choose_expr( \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) __drbd_printk_if_same_type(obj, struct drbd_connection *, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) __drbd_printk_connection, level, fmt, ## args), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) __builtin_choose_expr( \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) __drbd_printk_if_same_type(obj, struct drbd_peer_device *, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) __drbd_printk_peer_device, level, fmt, ## args), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) drbd_printk_with_wrong_object_type()))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) #define drbd_dbg(obj, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) drbd_printk(KERN_DEBUG, obj, fmt, ## args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) #define drbd_alert(obj, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) drbd_printk(KERN_ALERT, obj, fmt, ## args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) #define drbd_err(obj, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) drbd_printk(KERN_ERR, obj, fmt, ## args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #define drbd_warn(obj, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) drbd_printk(KERN_WARNING, obj, fmt, ## args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #define drbd_info(obj, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) drbd_printk(KERN_INFO, obj, fmt, ## args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) #define drbd_emerg(obj, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) drbd_printk(KERN_EMERG, obj, fmt, ## args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) #define dynamic_drbd_dbg(device, fmt, args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) dynamic_dev_dbg(disk_to_dev(device->vdisk), fmt, ## args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) #define D_ASSERT(device, exp) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if (!(exp)) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) drbd_err(device, "ASSERT( " #exp " ) in %s:%d\n", __FILE__, __LINE__); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) * expect - Make an assertion
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) * Unlike the assert macro, this macro returns a boolean result.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) #define expect(exp) ({ \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) bool _bool = (exp); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (!_bool) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) drbd_err(device, "ASSERTION %s FAILED in %s\n", \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) #exp, __func__); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) _bool; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /* Defines to control fault insertion */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) DRBD_FAULT_MD_WR = 0, /* meta data write */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) DRBD_FAULT_MD_RD = 1, /* read */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) DRBD_FAULT_RS_WR = 2, /* resync */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) DRBD_FAULT_RS_RD = 3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) DRBD_FAULT_DT_WR = 4, /* data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) DRBD_FAULT_DT_RD = 5,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) DRBD_FAULT_DT_RA = 6, /* data read ahead */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) DRBD_FAULT_BM_ALLOC = 7, /* bitmap allocation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) DRBD_FAULT_AL_EE = 8, /* alloc ee */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) DRBD_FAULT_RECEIVE = 9, /* Changes some bytes upon receiving a [rs]data block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) DRBD_FAULT_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) extern unsigned int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) _drbd_insert_fault(struct drbd_device *device, unsigned int type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static inline int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) drbd_insert_fault(struct drbd_device *device, unsigned int type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) #ifdef CONFIG_DRBD_FAULT_INJECTION
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) return drbd_fault_rate &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) (drbd_enable_faults & (1<<type)) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) _drbd_insert_fault(device, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /* integer division, round _UP_ to the next integer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) #define div_ceil(A, B) ((A)/(B) + ((A)%(B) ? 1 : 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) /* usual integer division */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) #define div_floor(A, B) ((A)/(B))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) extern struct ratelimit_state drbd_ratelimit_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) extern struct idr drbd_devices; /* RCU, updates: genl_lock() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) extern struct list_head drbd_resources; /* RCU, updates: genl_lock() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) extern const char *cmdname(enum drbd_packet cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) /* for sending/receiving the bitmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) * possibly in some encoding scheme */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) struct bm_xfer_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) /* "const"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) * stores total bits and long words
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) * of the bitmap, so we don't need to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) * call the accessor functions over and again. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) unsigned long bm_bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) unsigned long bm_words;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) /* during xfer, current position within the bitmap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) unsigned long bit_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) unsigned long word_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) /* statistics; index: (h->command == P_BITMAP) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) unsigned packets[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) unsigned bytes[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) extern void INFO_bm_xfer_stats(struct drbd_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) const char *direction, struct bm_xfer_ctx *c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) static inline void bm_xfer_ctx_bit_to_word_offset(struct bm_xfer_ctx *c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) /* word_offset counts "native long words" (32 or 64 bit),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) * aligned at 64 bit.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) * Encoded packet may end at an unaligned bit offset.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) * In case a fallback clear text packet is transmitted in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) * between, we adjust this offset back to the last 64bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) * aligned "native long word", which makes coding and decoding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) * the plain text bitmap much more convenient. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) #if BITS_PER_LONG == 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) c->word_offset = c->bit_offset >> 6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) #elif BITS_PER_LONG == 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) c->word_offset = c->bit_offset >> 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) c->word_offset &= ~(1UL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) # error "unsupported BITS_PER_LONG"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) extern unsigned int drbd_header_size(struct drbd_connection *connection);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) /**********************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) enum drbd_thread_state {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) NONE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) RUNNING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) EXITING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) RESTARTING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) struct drbd_thread {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) spinlock_t t_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) struct task_struct *task;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) struct completion stop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) enum drbd_thread_state t_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) int (*function) (struct drbd_thread *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) struct drbd_resource *resource;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) struct drbd_connection *connection;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) int reset_cpu_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) static inline enum drbd_thread_state get_t_state(struct drbd_thread *thi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) /* THINK testing the t_state seems to be uncritical in all cases
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) * (but thread_{start,stop}), so we can read it *without* the lock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) * --lge */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) smp_rmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) return thi->t_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) struct drbd_work {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) int (*cb)(struct drbd_work *, int cancel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) struct drbd_device_work {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) struct drbd_work w;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) struct drbd_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) #include "drbd_interval.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) extern int drbd_wait_misc(struct drbd_device *, struct drbd_interval *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) extern void lock_all_resources(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) extern void unlock_all_resources(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) struct drbd_request {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) struct drbd_work w;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) struct drbd_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) /* if local IO is not allowed, will be NULL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) * if local IO _is_ allowed, holds the locally submitted bio clone,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) * or, after local IO completion, the ERR_PTR(error).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) * see drbd_request_endio(). */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) struct bio *private_bio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) struct drbd_interval i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) /* epoch: used to check on "completion" whether this req was in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) * the current epoch, and we therefore have to close it,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) * causing a p_barrier packet to be send, starting a new epoch.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) * This corresponds to "barrier" in struct p_barrier[_ack],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) * and to "barrier_nr" in struct drbd_epoch (and various
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) * comments/function parameters/local variable names).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) unsigned int epoch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) struct list_head tl_requests; /* ring list in the transfer log */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) struct bio *master_bio; /* master bio pointer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) /* see struct drbd_device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) struct list_head req_pending_master_completion;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) struct list_head req_pending_local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) /* for generic IO accounting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) unsigned long start_jif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) /* for DRBD internal statistics */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) /* Minimal set of time stamps to determine if we wait for activity log
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) * transactions, local disk or peer. 32 bit "jiffies" are good enough,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) * we don't expect a DRBD request to be stalled for several month.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) /* before actual request processing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) unsigned long in_actlog_jif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) /* local disk */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) unsigned long pre_submit_jif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) /* per connection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) unsigned long pre_send_jif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) unsigned long acked_jif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) unsigned long net_done_jif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) /* Possibly even more detail to track each phase:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) * master_completion_jif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) * how long did it take to complete the master bio
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) * (application visible latency)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) * allocated_jif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) * how long the master bio was blocked until we finally allocated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) * a tracking struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) * in_actlog_jif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) * how long did we wait for activity log transactions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) * net_queued_jif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) * when did we finally queue it for sending
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) * pre_send_jif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) * when did we start sending it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) * post_send_jif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) * how long did we block in the network stack trying to send it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) * acked_jif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) * when did we receive (or fake, in protocol A) a remote ACK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) * net_done_jif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) * when did we receive final acknowledgement (P_BARRIER_ACK),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) * or decide, e.g. on connection loss, that we do no longer expect
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) * anything from this peer for this request.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) * pre_submit_jif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) * post_sub_jif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) * when did we start submiting to the lower level device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) * and how long did we block in that submit function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) * local_completion_jif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) * how long did it take the lower level device to complete this request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) /* once it hits 0, we may complete the master_bio */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) atomic_t completion_ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) /* once it hits 0, we may destroy this drbd_request object */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) struct kref kref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) unsigned rq_state; /* see comments above _req_mod() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) struct drbd_epoch {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) struct drbd_connection *connection;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) unsigned int barrier_nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) atomic_t epoch_size; /* increased on every request added. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) atomic_t active; /* increased on every req. added, and dec on every finished. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) /* Prototype declaration of function defined in drbd_receiver.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) int drbdd_init(struct drbd_thread *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) int drbd_asender(struct drbd_thread *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) /* drbd_epoch flag bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) DE_HAVE_BARRIER_NUMBER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) enum epoch_event {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) EV_PUT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) EV_GOT_BARRIER_NR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) EV_BECAME_LAST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) EV_CLEANUP = 32, /* used as flag */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) struct digest_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) int digest_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) void *digest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) struct drbd_peer_request {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) struct drbd_work w;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) struct drbd_peer_device *peer_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) struct drbd_epoch *epoch; /* for writes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) struct page *pages;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) atomic_t pending_bios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) struct drbd_interval i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) /* see comments on ee flag bits below */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) unsigned long submit_jif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) u64 block_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) struct digest_info *digest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) /* ee flag bits.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) * While corresponding bios are in flight, the only modification will be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) * set_bit WAS_ERROR, which has to be atomic.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) * If no bios are in flight yet, or all have been completed,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) * non-atomic modification to ee->flags is ok.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) __EE_CALL_AL_COMPLETE_IO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) __EE_MAY_SET_IN_SYNC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) /* is this a TRIM aka REQ_OP_DISCARD? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) __EE_TRIM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) /* explicit zero-out requested, or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) * our lower level cannot handle trim,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) * and we want to fall back to zeroout instead */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) __EE_ZEROOUT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) /* In case a barrier failed,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) * we need to resubmit without the barrier flag. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) __EE_RESUBMITTED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) /* we may have several bios per peer request.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) * if any of those fail, we set this flag atomically
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) * from the endio callback */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) __EE_WAS_ERROR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) /* This ee has a pointer to a digest instead of a block id */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) __EE_HAS_DIGEST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) /* Conflicting local requests need to be restarted after this request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) __EE_RESTART_REQUESTS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) /* The peer wants a write ACK for this (wire proto C) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) __EE_SEND_WRITE_ACK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) /* Is set when net_conf had two_primaries set while creating this peer_req */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) __EE_IN_INTERVAL_TREE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) /* for debugfs: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) /* has this been submitted, or does it still wait for something else? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) __EE_SUBMITTED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) /* this is/was a write request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) __EE_WRITE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) /* this is/was a write same request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) __EE_WRITE_SAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) /* this originates from application on peer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) * (not some resync or verify or other DRBD internal request) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) __EE_APPLICATION,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) /* If it contains only 0 bytes, send back P_RS_DEALLOCATED */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) __EE_RS_THIN_REQ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) #define EE_CALL_AL_COMPLETE_IO (1<<__EE_CALL_AL_COMPLETE_IO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) #define EE_MAY_SET_IN_SYNC (1<<__EE_MAY_SET_IN_SYNC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) #define EE_TRIM (1<<__EE_TRIM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) #define EE_ZEROOUT (1<<__EE_ZEROOUT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) #define EE_RESUBMITTED (1<<__EE_RESUBMITTED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) #define EE_WAS_ERROR (1<<__EE_WAS_ERROR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) #define EE_HAS_DIGEST (1<<__EE_HAS_DIGEST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) #define EE_RESTART_REQUESTS (1<<__EE_RESTART_REQUESTS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) #define EE_SEND_WRITE_ACK (1<<__EE_SEND_WRITE_ACK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) #define EE_IN_INTERVAL_TREE (1<<__EE_IN_INTERVAL_TREE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) #define EE_SUBMITTED (1<<__EE_SUBMITTED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) #define EE_WRITE (1<<__EE_WRITE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) #define EE_WRITE_SAME (1<<__EE_WRITE_SAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) #define EE_APPLICATION (1<<__EE_APPLICATION)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) #define EE_RS_THIN_REQ (1<<__EE_RS_THIN_REQ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) /* flag bits per device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) UNPLUG_REMOTE, /* sending a "UnplugRemote" could help */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) MD_DIRTY, /* current uuids and flags not yet on disk */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) USE_DEGR_WFC_T, /* degr-wfc-timeout instead of wfc-timeout. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) CL_ST_CHG_SUCCESS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) CL_ST_CHG_FAIL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) CRASHED_PRIMARY, /* This node was a crashed primary.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) * Gets cleared when the state.conn
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) * goes into C_CONNECTED state. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) CONSIDER_RESYNC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) MD_NO_FUA, /* Users wants us to not use FUA/FLUSH on meta data dev */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) BITMAP_IO, /* suspend application io;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) once no more io in flight, start bitmap io */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) BITMAP_IO_QUEUED, /* Started bitmap IO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) WAS_IO_ERROR, /* Local disk failed, returned IO error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) WAS_READ_ERROR, /* Local disk READ failed (set additionally to the above) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) FORCE_DETACH, /* Force-detach from local disk, aborting any pending local IO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) RESYNC_AFTER_NEG, /* Resync after online grow after the attach&negotiate finished. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) RESIZE_PENDING, /* Size change detected locally, waiting for the response from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) * the peer, if it changed there as well. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) NEW_CUR_UUID, /* Create new current UUID when thawing IO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) AL_SUSPENDED, /* Activity logging is currently suspended. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) AHEAD_TO_SYNC_SOURCE, /* Ahead -> SyncSource queued */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) B_RS_H_DONE, /* Before resync handler done (already executed) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) DISCARD_MY_DATA, /* discard_my_data flag per volume */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) READ_BALANCE_RR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) FLUSH_PENDING, /* if set, device->flush_jif is when we submitted that flush
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) * from drbd_flush_after_epoch() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) /* cleared only after backing device related structures have been destroyed. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) GOING_DISKLESS, /* Disk is being detached, because of io-error, or admin request. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) /* to be used in drbd_device_post_work() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) GO_DISKLESS, /* tell worker to schedule cleanup before detach */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) DESTROY_DISK, /* tell worker to close backing devices and destroy related structures. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) MD_SYNC, /* tell worker to call drbd_md_sync() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) RS_START, /* tell worker to start resync/OV */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) RS_PROGRESS, /* tell worker that resync made significant progress */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) RS_DONE, /* tell worker that resync is done */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) struct drbd_bitmap; /* opaque for drbd_device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) /* definition of bits in bm_flags to be used in drbd_bm_lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) * and drbd_bitmap_io and friends. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) enum bm_flag {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) /* currently locked for bulk operation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) BM_LOCKED_MASK = 0xf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) /* in detail, that is: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) BM_DONT_CLEAR = 0x1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) BM_DONT_SET = 0x2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) BM_DONT_TEST = 0x4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) /* so we can mark it locked for bulk operation,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) * and still allow all non-bulk operations */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) BM_IS_LOCKED = 0x8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) /* (test bit, count bit) allowed (common case) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) BM_LOCKED_TEST_ALLOWED = BM_DONT_CLEAR | BM_DONT_SET | BM_IS_LOCKED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) /* testing bits, as well as setting new bits allowed, but clearing bits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) * would be unexpected. Used during bitmap receive. Setting new bits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) * requires sending of "out-of-sync" information, though. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) BM_LOCKED_SET_ALLOWED = BM_DONT_CLEAR | BM_IS_LOCKED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) /* for drbd_bm_write_copy_pages, everything is allowed,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) * only concurrent bulk operations are locked out. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) BM_LOCKED_CHANGE_ALLOWED = BM_IS_LOCKED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) struct drbd_work_queue {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) struct list_head q;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) spinlock_t q_lock; /* to protect the list. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) wait_queue_head_t q_wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) struct drbd_socket {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) struct mutex mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) struct socket *socket;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) /* this way we get our
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) * send/receive buffers off the stack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) void *sbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) void *rbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) struct drbd_md {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) u64 md_offset; /* sector offset to 'super' block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) u64 la_size_sect; /* last agreed size, unit sectors */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) spinlock_t uuid_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) u64 uuid[UI_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) u64 device_uuid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) u32 flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) u32 md_size_sect;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) s32 al_offset; /* signed relative sector offset to activity log */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) s32 bm_offset; /* signed relative sector offset to bitmap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) /* cached value of bdev->disk_conf->meta_dev_idx (see below) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) s32 meta_dev_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) /* see al_tr_number_to_on_disk_sector() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) u32 al_stripes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) u32 al_stripe_size_4k;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) u32 al_size_4k; /* cached product of the above */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) struct drbd_backing_dev {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) struct block_device *backing_bdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) struct block_device *md_bdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) struct drbd_md md;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) struct disk_conf *disk_conf; /* RCU, for updates: resource->conf_update */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) sector_t known_size; /* last known size of that backing device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) struct drbd_md_io {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) struct page *page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) unsigned long start_jif; /* last call to drbd_md_get_buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) unsigned long submit_jif; /* last _drbd_md_sync_page_io() submit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) const char *current_use;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) atomic_t in_use;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) unsigned int done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) struct bm_io_work {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) struct drbd_work w;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) char *why;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) enum bm_flag flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) int (*io_fn)(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) void (*done)(struct drbd_device *device, int rv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) struct fifo_buffer {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) unsigned int head_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) unsigned int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) int total; /* sum of all values */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) int values[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) extern struct fifo_buffer *fifo_alloc(unsigned int fifo_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) /* flag bits per connection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) NET_CONGESTED, /* The data socket is congested */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) RESOLVE_CONFLICTS, /* Set on one node, cleared on the peer! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) SEND_PING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) GOT_PING_ACK, /* set when we receive a ping_ack packet, ping_wait gets woken */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) CONN_WD_ST_CHG_REQ, /* A cluster wide state change on the connection is active */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) CONN_WD_ST_CHG_OKAY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) CONN_WD_ST_CHG_FAIL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) CONN_DRY_RUN, /* Expect disconnect after resync handshake. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) CREATE_BARRIER, /* next P_DATA is preceded by a P_BARRIER */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) STATE_SENT, /* Do not change state/UUIDs while this is set */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) CALLBACK_PENDING, /* Whether we have a call_usermodehelper(, UMH_WAIT_PROC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) * pending, from drbd worker context.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) * If set, bdi_write_congested() returns true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) * so shrink_page_list() would not recurse into,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) * and potentially deadlock on, this drbd worker.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) DISCONNECT_SENT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) DEVICE_WORK_PENDING, /* tell worker that some device has pending work */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) enum which_state { NOW, OLD = NOW, NEW };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) struct drbd_resource {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) #ifdef CONFIG_DEBUG_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) struct dentry *debugfs_res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) struct dentry *debugfs_res_volumes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) struct dentry *debugfs_res_connections;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) struct dentry *debugfs_res_in_flight_summary;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) struct kref kref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) struct idr devices; /* volume number to device mapping */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) struct list_head connections;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) struct list_head resources;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) struct res_opts res_opts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) struct mutex conf_update; /* mutex for ready-copy-update of net_conf and disk_conf */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) struct mutex adm_mutex; /* mutex to serialize administrative requests */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) spinlock_t req_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) unsigned susp:1; /* IO suspended by user */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) unsigned susp_nod:1; /* IO suspended because no data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) unsigned susp_fen:1; /* IO suspended because fence peer handler runs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) enum write_ordering_e write_ordering;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) cpumask_var_t cpu_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) struct drbd_thread_timing_details
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) unsigned long start_jif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) void *cb_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) const char *caller_fn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) unsigned int line;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) unsigned int cb_nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) struct drbd_connection {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) struct list_head connections;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) struct drbd_resource *resource;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) #ifdef CONFIG_DEBUG_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) struct dentry *debugfs_conn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) struct dentry *debugfs_conn_callback_history;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) struct dentry *debugfs_conn_oldest_requests;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) struct kref kref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) struct idr peer_devices; /* volume number to peer device mapping */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) enum drbd_conns cstate; /* Only C_STANDALONE to C_WF_REPORT_PARAMS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) struct mutex cstate_mutex; /* Protects graceful disconnects */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) unsigned int connect_cnt; /* Inc each time a connection is established */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) struct net_conf *net_conf; /* content protected by rcu */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) wait_queue_head_t ping_wait; /* Woken upon reception of a ping, and a state change */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) struct sockaddr_storage my_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) int my_addr_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) struct sockaddr_storage peer_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) int peer_addr_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) struct drbd_socket data; /* data/barrier/cstate/parameter packets */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) struct drbd_socket meta; /* ping/ack (metadata) packets */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) int agreed_pro_version; /* actually used protocol version */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) u32 agreed_features;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) unsigned long last_received; /* in jiffies, either socket */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) unsigned int ko_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) struct list_head transfer_log; /* all requests not yet fully processed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) struct crypto_shash *cram_hmac_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) struct crypto_shash *integrity_tfm; /* checksums we compute, updates protected by connection->data->mutex */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) struct crypto_shash *peer_integrity_tfm; /* checksums we verify, only accessed from receiver thread */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) struct crypto_shash *csums_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) struct crypto_shash *verify_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) void *int_dig_in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) void *int_dig_vv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) /* receiver side */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) struct drbd_epoch *current_epoch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) spinlock_t epoch_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) unsigned int epochs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) atomic_t current_tle_nr; /* transfer log epoch number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) unsigned current_tle_writes; /* writes seen within this tl epoch */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) unsigned long last_reconnect_jif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) /* empty member on older kernels without blk_start_plug() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) struct blk_plug receiver_plug;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) struct drbd_thread receiver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) struct drbd_thread worker;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) struct drbd_thread ack_receiver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) struct workqueue_struct *ack_sender;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) /* cached pointers,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) * so we can look up the oldest pending requests more quickly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) * protected by resource->req_lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) struct drbd_request *req_next; /* DRBD 9: todo.req_next */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) struct drbd_request *req_ack_pending;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) struct drbd_request *req_not_net_done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) /* sender side */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) struct drbd_work_queue sender_work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) #define DRBD_THREAD_DETAILS_HIST 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) unsigned int w_cb_nr; /* keeps counting up */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) unsigned int r_cb_nr; /* keeps counting up */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) struct drbd_thread_timing_details w_timing_details[DRBD_THREAD_DETAILS_HIST];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) struct drbd_thread_timing_details r_timing_details[DRBD_THREAD_DETAILS_HIST];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) unsigned long last_sent_barrier_jif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) /* whether this sender thread
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) * has processed a single write yet. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) bool seen_any_write_yet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) /* Which barrier number to send with the next P_BARRIER */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) int current_epoch_nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) /* how many write requests have been sent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) * with req->epoch == current_epoch_nr.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) * If none, no P_BARRIER will be sent. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) unsigned current_epoch_writes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) } send;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) static inline bool has_net_conf(struct drbd_connection *connection)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) bool has_net_conf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) has_net_conf = rcu_dereference(connection->net_conf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) return has_net_conf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) void __update_timing_details(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) struct drbd_thread_timing_details *tdp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) unsigned int *cb_nr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) void *cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) const char *fn, const unsigned int line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) #define update_worker_timing_details(c, cb) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) __update_timing_details(c->w_timing_details, &c->w_cb_nr, cb, __func__ , __LINE__ )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) #define update_receiver_timing_details(c, cb) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) __update_timing_details(c->r_timing_details, &c->r_cb_nr, cb, __func__ , __LINE__ )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) struct submit_worker {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) struct workqueue_struct *wq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) struct work_struct worker;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) /* protected by ..->resource->req_lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) struct list_head writes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) struct drbd_peer_device {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) struct list_head peer_devices;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) struct drbd_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) struct drbd_connection *connection;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) struct work_struct send_acks_work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) #ifdef CONFIG_DEBUG_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) struct dentry *debugfs_peer_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) struct drbd_device {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) struct drbd_resource *resource;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) struct list_head peer_devices;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) struct list_head pending_bitmap_io;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) unsigned long flush_jif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) #ifdef CONFIG_DEBUG_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) struct dentry *debugfs_minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) struct dentry *debugfs_vol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) struct dentry *debugfs_vol_oldest_requests;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) struct dentry *debugfs_vol_act_log_extents;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) struct dentry *debugfs_vol_resync_extents;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) struct dentry *debugfs_vol_data_gen_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) struct dentry *debugfs_vol_ed_gen_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) unsigned int vnr; /* volume number within the connection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) unsigned int minor; /* device minor number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) struct kref kref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) /* things that are stored as / read from meta data on disk */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) /* configured by drbdsetup */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) struct drbd_backing_dev *ldev __protected_by(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) sector_t p_size; /* partner's disk size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) struct request_queue *rq_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) struct gendisk *vdisk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) unsigned long last_reattach_jif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) struct drbd_work resync_work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) struct drbd_work unplug_work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) struct timer_list resync_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) struct timer_list md_sync_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) struct timer_list start_resync_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) struct timer_list request_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) /* Used after attach while negotiating new disk state. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) union drbd_state new_state_tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) union drbd_dev_state state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) wait_queue_head_t misc_wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) wait_queue_head_t state_wait; /* upon each state change. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) unsigned int send_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) unsigned int recv_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) unsigned int read_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) unsigned int writ_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) unsigned int al_writ_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) unsigned int bm_writ_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) atomic_t ap_bio_cnt; /* Requests we need to complete */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) atomic_t ap_actlog_cnt; /* Requests waiting for activity log */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) atomic_t ap_pending_cnt; /* AP data packets on the wire, ack expected */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) atomic_t rs_pending_cnt; /* RS request/data packets on the wire */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) atomic_t unacked_cnt; /* Need to send replies for */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) atomic_t local_cnt; /* Waiting for local completion */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) atomic_t suspend_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) /* Interval tree of pending local requests */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) struct rb_root read_requests;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) struct rb_root write_requests;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) /* for statistics and timeouts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) /* [0] read, [1] write */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) struct list_head pending_master_completion[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) struct list_head pending_completion[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) /* use checksums for *this* resync */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) bool use_csums;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) /* blocks to resync in this run [unit BM_BLOCK_SIZE] */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) unsigned long rs_total;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) /* number of resync blocks that failed in this run */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) unsigned long rs_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) /* Syncer's start time [unit jiffies] */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) unsigned long rs_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) /* cumulated time in PausedSyncX state [unit jiffies] */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) unsigned long rs_paused;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) /* skipped because csum was equal [unit BM_BLOCK_SIZE] */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) unsigned long rs_same_csum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) #define DRBD_SYNC_MARKS 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) #define DRBD_SYNC_MARK_STEP (3*HZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) /* block not up-to-date at mark [unit BM_BLOCK_SIZE] */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) unsigned long rs_mark_left[DRBD_SYNC_MARKS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) /* marks's time [unit jiffies] */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) unsigned long rs_mark_time[DRBD_SYNC_MARKS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) /* current index into rs_mark_{left,time} */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) int rs_last_mark;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) unsigned long rs_last_bcast; /* [unit jiffies] */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) /* where does the admin want us to start? (sector) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) sector_t ov_start_sector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) sector_t ov_stop_sector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) /* where are we now? (sector) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) sector_t ov_position;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) /* Start sector of out of sync range (to merge printk reporting). */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) sector_t ov_last_oos_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) /* size of out-of-sync range in sectors. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) sector_t ov_last_oos_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) unsigned long ov_left; /* in bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) struct drbd_bitmap *bitmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) unsigned long bm_resync_fo; /* bit offset for drbd_bm_find_next */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) /* Used to track operations of resync... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) struct lru_cache *resync;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) /* Number of locked elements in resync LRU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) unsigned int resync_locked;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) /* resync extent number waiting for application requests */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) unsigned int resync_wenr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) int open_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) u64 *p_uuid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) struct list_head active_ee; /* IO in progress (P_DATA gets written to disk) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) struct list_head sync_ee; /* IO in progress (P_RS_DATA_REPLY gets written to disk) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) struct list_head done_ee; /* need to send P_WRITE_ACK */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) struct list_head read_ee; /* [RS]P_DATA_REQUEST being read */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) struct list_head net_ee; /* zero-copy network send in progress */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) int next_barrier_nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) struct list_head resync_reads;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) atomic_t pp_in_use; /* allocated from page pool */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) atomic_t pp_in_use_by_net; /* sendpage()d, still referenced by tcp */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) wait_queue_head_t ee_wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) struct drbd_md_io md_io;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) spinlock_t al_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) wait_queue_head_t al_wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) struct lru_cache *act_log; /* activity log */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) unsigned int al_tr_number;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) int al_tr_cycle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) wait_queue_head_t seq_wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) atomic_t packet_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) unsigned int peer_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) spinlock_t peer_seq_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) unsigned long comm_bm_set; /* communicated number of set bits. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) struct bm_io_work bm_io_work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) u64 ed_uuid; /* UUID of the exposed data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) struct mutex own_state_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) struct mutex *state_mutex; /* either own_state_mutex or first_peer_device(device)->connection->cstate_mutex */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) char congestion_reason; /* Why we where congested... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) atomic_t rs_sect_in; /* for incoming resync data rate, SyncTarget */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) atomic_t rs_sect_ev; /* for submitted resync data rate, both */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) int rs_last_sect_ev; /* counter to compare with */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) int rs_last_events; /* counter of read or write "events" (unit sectors)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) * on the lower level device when we last looked. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) int c_sync_rate; /* current resync rate after syncer throttle magic */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) struct fifo_buffer *rs_plan_s; /* correction values of resync planer (RCU, connection->conn_update) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) int rs_in_flight; /* resync sectors in flight (to proxy, in proxy and from proxy) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) atomic_t ap_in_flight; /* App sectors in flight (waiting for ack) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) unsigned int peer_max_bio_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) unsigned int local_max_bio_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) /* any requests that would block in drbd_make_request()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) * are deferred to this single-threaded work queue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) struct submit_worker submit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) struct drbd_bm_aio_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) struct drbd_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) struct list_head list; /* on device->pending_bitmap_io */;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) unsigned long start_jif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) atomic_t in_flight;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) unsigned int done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) unsigned flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) #define BM_AIO_COPY_PAGES 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) #define BM_AIO_WRITE_HINTED 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) #define BM_AIO_WRITE_ALL_PAGES 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) #define BM_AIO_READ 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) struct kref kref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) struct drbd_config_context {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) /* assigned from drbd_genlmsghdr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) unsigned int minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) /* assigned from request attributes, if present */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) unsigned int volume;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) #define VOLUME_UNSPECIFIED (-1U)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) /* pointer into the request skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) * limited lifetime! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) char *resource_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) struct nlattr *my_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) struct nlattr *peer_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) /* reply buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) struct sk_buff *reply_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) /* pointer into reply buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) struct drbd_genlmsghdr *reply_dh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) /* resolved from attributes, if possible */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) struct drbd_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) struct drbd_resource *resource;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) struct drbd_connection *connection;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) static inline struct drbd_device *minor_to_device(unsigned int minor)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) return (struct drbd_device *)idr_find(&drbd_devices, minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) static inline struct drbd_peer_device *first_peer_device(struct drbd_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) return list_first_entry_or_null(&device->peer_devices, struct drbd_peer_device, peer_devices);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) static inline struct drbd_peer_device *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) conn_peer_device(struct drbd_connection *connection, int volume_number)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) return idr_find(&connection->peer_devices, volume_number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) #define for_each_resource(resource, _resources) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) list_for_each_entry(resource, _resources, resources)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) #define for_each_resource_rcu(resource, _resources) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) list_for_each_entry_rcu(resource, _resources, resources)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) #define for_each_resource_safe(resource, tmp, _resources) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) list_for_each_entry_safe(resource, tmp, _resources, resources)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) #define for_each_connection(connection, resource) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) list_for_each_entry(connection, &resource->connections, connections)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) #define for_each_connection_rcu(connection, resource) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) list_for_each_entry_rcu(connection, &resource->connections, connections)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) #define for_each_connection_safe(connection, tmp, resource) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) list_for_each_entry_safe(connection, tmp, &resource->connections, connections)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) #define for_each_peer_device(peer_device, device) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) list_for_each_entry(peer_device, &device->peer_devices, peer_devices)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) #define for_each_peer_device_rcu(peer_device, device) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) list_for_each_entry_rcu(peer_device, &device->peer_devices, peer_devices)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) #define for_each_peer_device_safe(peer_device, tmp, device) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) list_for_each_entry_safe(peer_device, tmp, &device->peer_devices, peer_devices)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) static inline unsigned int device_to_minor(struct drbd_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) return device->minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) * function declarations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) *************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) /* drbd_main.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) enum dds_flags {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) DDSF_FORCED = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) DDSF_NO_RESYNC = 2, /* Do not run a resync for the new space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) extern void drbd_init_set_defaults(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) extern int drbd_thread_start(struct drbd_thread *thi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) extern void _drbd_thread_stop(struct drbd_thread *thi, int restart, int wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) extern void drbd_thread_current_set_cpu(struct drbd_thread *thi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) #define drbd_thread_current_set_cpu(A) ({})
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) extern void tl_release(struct drbd_connection *, unsigned int barrier_nr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) unsigned int set_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) extern void tl_clear(struct drbd_connection *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) extern void drbd_free_sock(struct drbd_connection *connection);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) extern int drbd_send(struct drbd_connection *connection, struct socket *sock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) void *buf, size_t size, unsigned msg_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) extern int drbd_send_all(struct drbd_connection *, struct socket *, void *, size_t,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) unsigned);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) extern int __drbd_send_protocol(struct drbd_connection *connection, enum drbd_packet cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) extern int drbd_send_protocol(struct drbd_connection *connection);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) extern int drbd_send_uuids(struct drbd_peer_device *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) extern int drbd_send_uuids_skip_initial_sync(struct drbd_peer_device *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) extern void drbd_gen_and_send_sync_uuid(struct drbd_peer_device *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) extern int drbd_send_sizes(struct drbd_peer_device *, int trigger_reply, enum dds_flags flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) extern int drbd_send_state(struct drbd_peer_device *, union drbd_state s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) extern int drbd_send_current_state(struct drbd_peer_device *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) extern int drbd_send_sync_param(struct drbd_peer_device *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) extern void drbd_send_b_ack(struct drbd_connection *connection, u32 barrier_nr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) u32 set_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) extern int drbd_send_ack(struct drbd_peer_device *, enum drbd_packet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) struct drbd_peer_request *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) extern void drbd_send_ack_rp(struct drbd_peer_device *, enum drbd_packet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) struct p_block_req *rp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) extern void drbd_send_ack_dp(struct drbd_peer_device *, enum drbd_packet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) struct p_data *dp, int data_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) extern int drbd_send_ack_ex(struct drbd_peer_device *, enum drbd_packet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) sector_t sector, int blksize, u64 block_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) extern int drbd_send_out_of_sync(struct drbd_peer_device *, struct drbd_request *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) extern int drbd_send_block(struct drbd_peer_device *, enum drbd_packet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) struct drbd_peer_request *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) extern int drbd_send_dblock(struct drbd_peer_device *, struct drbd_request *req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) extern int drbd_send_drequest(struct drbd_peer_device *, int cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) sector_t sector, int size, u64 block_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) extern int drbd_send_drequest_csum(struct drbd_peer_device *, sector_t sector,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) int size, void *digest, int digest_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) enum drbd_packet cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) extern int drbd_send_ov_request(struct drbd_peer_device *, sector_t sector, int size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) extern int drbd_send_bitmap(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) extern void drbd_send_sr_reply(struct drbd_peer_device *, enum drbd_state_rv retcode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) extern void conn_send_sr_reply(struct drbd_connection *connection, enum drbd_state_rv retcode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) extern int drbd_send_rs_deallocated(struct drbd_peer_device *, struct drbd_peer_request *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) extern void drbd_backing_dev_free(struct drbd_device *device, struct drbd_backing_dev *ldev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) extern void drbd_device_cleanup(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) extern void drbd_print_uuids(struct drbd_device *device, const char *text);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) extern void drbd_queue_unplug(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) extern void conn_md_sync(struct drbd_connection *connection);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) extern void drbd_md_write(struct drbd_device *device, void *buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) extern void drbd_md_sync(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) extern int drbd_md_read(struct drbd_device *device, struct drbd_backing_dev *bdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) extern void drbd_uuid_set(struct drbd_device *device, int idx, u64 val) __must_hold(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) extern void _drbd_uuid_set(struct drbd_device *device, int idx, u64 val) __must_hold(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) extern void drbd_uuid_new_current(struct drbd_device *device) __must_hold(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) extern void drbd_uuid_set_bm(struct drbd_device *device, u64 val) __must_hold(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) extern void drbd_uuid_move_history(struct drbd_device *device) __must_hold(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) extern void __drbd_uuid_set(struct drbd_device *device, int idx, u64 val) __must_hold(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) extern void drbd_md_set_flag(struct drbd_device *device, int flags) __must_hold(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) extern void drbd_md_clear_flag(struct drbd_device *device, int flags)__must_hold(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) extern int drbd_md_test_flag(struct drbd_backing_dev *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) extern void drbd_md_mark_dirty(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) extern void drbd_queue_bitmap_io(struct drbd_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) int (*io_fn)(struct drbd_device *),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) void (*done)(struct drbd_device *, int),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) char *why, enum bm_flag flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) extern int drbd_bitmap_io(struct drbd_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) int (*io_fn)(struct drbd_device *),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) char *why, enum bm_flag flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) extern int drbd_bitmap_io_from_worker(struct drbd_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) int (*io_fn)(struct drbd_device *),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) char *why, enum bm_flag flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) extern int drbd_bmio_set_n_write(struct drbd_device *device) __must_hold(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) extern int drbd_bmio_clear_n_write(struct drbd_device *device) __must_hold(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) /* Meta data layout
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) * We currently have two possible layouts.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) * Offsets in (512 byte) sectors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) * external:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) * |----------- md_size_sect ------------------|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) * [ 4k superblock ][ activity log ][ Bitmap ]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) * | al_offset == 8 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) * | bm_offset = al_offset + X |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) * ==> bitmap sectors = md_size_sect - bm_offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) * Variants:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) * old, indexed fixed size meta data:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) * internal:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) * |----------- md_size_sect ------------------|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) * [data.....][ Bitmap ][ activity log ][ 4k superblock ][padding*]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) * | al_offset < 0 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) * | bm_offset = al_offset - Y |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) * ==> bitmap sectors = Y = al_offset - bm_offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) * [padding*] are zero or up to 7 unused 512 Byte sectors to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) * end of the device, so that the [4k superblock] will be 4k aligned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) * The activity log consists of 4k transaction blocks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) * which are written in a ring-buffer, or striped ring-buffer like fashion,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) * which are writtensize used to be fixed 32kB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) * but is about to become configurable.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) /* Our old fixed size meta data layout
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) * allows up to about 3.8TB, so if you want more,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) * you need to use the "flexible" meta data format. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) #define MD_128MB_SECT (128LLU << 11) /* 128 MB, unit sectors */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) #define MD_4kB_SECT 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) #define MD_32kB_SECT 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) /* One activity log extent represents 4M of storage */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) #define AL_EXTENT_SHIFT 22
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) #define AL_EXTENT_SIZE (1<<AL_EXTENT_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) /* We could make these currently hardcoded constants configurable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) * variables at create-md time (or even re-configurable at runtime?).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) * Which will require some more changes to the DRBD "super block"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) * and attach code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) * updates per transaction:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) * This many changes to the active set can be logged with one transaction.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) * This number is arbitrary.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) * context per transaction:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) * This many context extent numbers are logged with each transaction.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) * This number is resulting from the transaction block size (4k), the layout
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) * of the transaction header, and the number of updates per transaction.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) * See drbd_actlog.c:struct al_transaction_on_disk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) * */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) #define AL_UPDATES_PER_TRANSACTION 64 // arbitrary
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) #define AL_CONTEXT_PER_TRANSACTION 919 // (4096 - 36 - 6*64)/4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) #if BITS_PER_LONG == 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) #define LN2_BPL 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) #define cpu_to_lel(A) cpu_to_le32(A)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) #define lel_to_cpu(A) le32_to_cpu(A)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) #elif BITS_PER_LONG == 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) #define LN2_BPL 6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) #define cpu_to_lel(A) cpu_to_le64(A)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) #define lel_to_cpu(A) le64_to_cpu(A)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) #error "LN2 of BITS_PER_LONG unknown!"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) /* resync bitmap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) /* 16MB sized 'bitmap extent' to track syncer usage */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) struct bm_extent {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) int rs_left; /* number of bits set (out of sync) in this extent. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) int rs_failed; /* number of failed resync requests in this extent. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) struct lc_element lce;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) #define BME_NO_WRITES 0 /* bm_extent.flags: no more requests on this one! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) #define BME_LOCKED 1 /* bm_extent.flags: syncer active on this one. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) #define BME_PRIORITY 2 /* finish resync IO on this extent ASAP! App IO waiting! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) /* drbd_bitmap.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) * We need to store one bit for a block.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) * Example: 1GB disk @ 4096 byte blocks ==> we need 32 KB bitmap.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) * Bit 0 ==> local node thinks this block is binary identical on both nodes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) * Bit 1 ==> local node thinks this block needs to be synced.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) #define SLEEP_TIME (HZ/10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) /* We do bitmap IO in units of 4k blocks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) * We also still have a hardcoded 4k per bit relation. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) #define BM_BLOCK_SHIFT 12 /* 4k per bit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) #define BM_BLOCK_SIZE (1<<BM_BLOCK_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) /* mostly arbitrarily set the represented size of one bitmap extent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) * aka resync extent, to 16 MiB (which is also 512 Byte worth of bitmap
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) * at 4k per bit resolution) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) #define BM_EXT_SHIFT 24 /* 16 MiB per resync extent */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) #define BM_EXT_SIZE (1<<BM_EXT_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) #if (BM_EXT_SHIFT != 24) || (BM_BLOCK_SHIFT != 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) #error "HAVE YOU FIXED drbdmeta AS WELL??"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) /* thus many _storage_ sectors are described by one bit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) #define BM_SECT_TO_BIT(x) ((x)>>(BM_BLOCK_SHIFT-9))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) #define BM_BIT_TO_SECT(x) ((sector_t)(x)<<(BM_BLOCK_SHIFT-9))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) #define BM_SECT_PER_BIT BM_BIT_TO_SECT(1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) /* bit to represented kilo byte conversion */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) #define Bit2KB(bits) ((bits)<<(BM_BLOCK_SHIFT-10))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) /* in which _bitmap_ extent (resp. sector) the bit for a certain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) * _storage_ sector is located in */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) #define BM_SECT_TO_EXT(x) ((x)>>(BM_EXT_SHIFT-9))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) #define BM_BIT_TO_EXT(x) ((x) >> (BM_EXT_SHIFT - BM_BLOCK_SHIFT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) /* first storage sector a bitmap extent corresponds to */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) #define BM_EXT_TO_SECT(x) ((sector_t)(x) << (BM_EXT_SHIFT-9))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) /* how much _storage_ sectors we have per bitmap extent */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) #define BM_SECT_PER_EXT BM_EXT_TO_SECT(1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) /* how many bits are covered by one bitmap extent (resync extent) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) #define BM_BITS_PER_EXT (1UL << (BM_EXT_SHIFT - BM_BLOCK_SHIFT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) #define BM_BLOCKS_PER_BM_EXT_MASK (BM_BITS_PER_EXT - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) /* in one sector of the bitmap, we have this many activity_log extents. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) #define AL_EXT_PER_BM_SECT (1 << (BM_EXT_SHIFT - AL_EXTENT_SHIFT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) /* the extent in "PER_EXTENT" below is an activity log extent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) * we need that many (long words/bytes) to store the bitmap
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) * of one AL_EXTENT_SIZE chunk of storage.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) * we can store the bitmap for that many AL_EXTENTS within
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) * one sector of the _on_disk_ bitmap:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) * bit 0 bit 37 bit 38 bit (512*8)-1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) * ...|........|........|.. // ..|........|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) * sect. 0 `296 `304 ^(512*8*8)-1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) #define BM_WORDS_PER_EXT ( (AL_EXT_SIZE/BM_BLOCK_SIZE) / BITS_PER_LONG )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) #define BM_BYTES_PER_EXT ( (AL_EXT_SIZE/BM_BLOCK_SIZE) / 8 ) // 128
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) #define BM_EXT_PER_SECT ( 512 / BM_BYTES_PER_EXTENT ) // 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) #define DRBD_MAX_SECTORS_32 (0xffffffffLU)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) /* we have a certain meta data variant that has a fixed on-disk size of 128
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) * MiB, of which 4k are our "superblock", and 32k are the fixed size activity
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) * log, leaving this many sectors for the bitmap.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) #define DRBD_MAX_SECTORS_FIXED_BM \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) ((MD_128MB_SECT - MD_32kB_SECT - MD_4kB_SECT) * (1LL<<(BM_EXT_SHIFT-9)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) #define DRBD_MAX_SECTORS DRBD_MAX_SECTORS_FIXED_BM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) /* 16 TB in units of sectors */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) #if BITS_PER_LONG == 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) /* adjust by one page worth of bitmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) * so we won't wrap around in drbd_bm_find_next_bit.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) * you should use 64bit OS for that much storage, anyways. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) #define DRBD_MAX_SECTORS_FLEX BM_BIT_TO_SECT(0xffff7fff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) /* we allow up to 1 PiB now on 64bit architecture with "flexible" meta data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) #define DRBD_MAX_SECTORS_FLEX (1UL << 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) /* corresponds to (1UL << 38) bits right now. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) /* Estimate max bio size as 256 * PAGE_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) * so for typical PAGE_SIZE of 4k, that is (1<<20) Byte.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) * Since we may live in a mixed-platform cluster,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) * we limit us to a platform agnostic constant here for now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) * A followup commit may allow even bigger BIO sizes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) * once we thought that through. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) #define DRBD_MAX_BIO_SIZE (1U << 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) #if DRBD_MAX_BIO_SIZE > (BIO_MAX_PAGES << PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) #error Architecture not supported: DRBD_MAX_BIO_SIZE > BIO_MAX_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) #define DRBD_MAX_BIO_SIZE_SAFE (1U << 12) /* Works always = 4k */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) #define DRBD_MAX_SIZE_H80_PACKET (1U << 15) /* Header 80 only allows packets up to 32KiB data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) #define DRBD_MAX_BIO_SIZE_P95 (1U << 17) /* Protocol 95 to 99 allows bios up to 128KiB */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) /* For now, don't allow more than half of what we can "activate" in one
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) * activity log transaction to be discarded in one go. We may need to rework
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) * drbd_al_begin_io() to allow for even larger discard ranges */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) #define DRBD_MAX_BATCH_BIO_SIZE (AL_UPDATES_PER_TRANSACTION/2*AL_EXTENT_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) #define DRBD_MAX_BBIO_SECTORS (DRBD_MAX_BATCH_BIO_SIZE >> 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) extern int drbd_bm_init(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) extern int drbd_bm_resize(struct drbd_device *device, sector_t sectors, int set_new_bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) extern void drbd_bm_cleanup(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) extern void drbd_bm_set_all(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) extern void drbd_bm_clear_all(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) /* set/clear/test only a few bits at a time */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) extern int drbd_bm_set_bits(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) struct drbd_device *device, unsigned long s, unsigned long e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) extern int drbd_bm_clear_bits(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) struct drbd_device *device, unsigned long s, unsigned long e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) extern int drbd_bm_count_bits(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) struct drbd_device *device, const unsigned long s, const unsigned long e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) /* bm_set_bits variant for use while holding drbd_bm_lock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) * may process the whole bitmap in one go */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) extern void _drbd_bm_set_bits(struct drbd_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) const unsigned long s, const unsigned long e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) extern int drbd_bm_test_bit(struct drbd_device *device, unsigned long bitnr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) extern int drbd_bm_e_weight(struct drbd_device *device, unsigned long enr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) extern int drbd_bm_read(struct drbd_device *device) __must_hold(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) extern void drbd_bm_mark_for_writeout(struct drbd_device *device, int page_nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) extern int drbd_bm_write(struct drbd_device *device) __must_hold(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) extern void drbd_bm_reset_al_hints(struct drbd_device *device) __must_hold(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) extern int drbd_bm_write_hinted(struct drbd_device *device) __must_hold(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) extern int drbd_bm_write_lazy(struct drbd_device *device, unsigned upper_idx) __must_hold(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) extern int drbd_bm_write_all(struct drbd_device *device) __must_hold(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) extern int drbd_bm_write_copy_pages(struct drbd_device *device) __must_hold(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) extern size_t drbd_bm_words(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) extern unsigned long drbd_bm_bits(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) extern sector_t drbd_bm_capacity(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) #define DRBD_END_OF_BITMAP (~(unsigned long)0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) extern unsigned long drbd_bm_find_next(struct drbd_device *device, unsigned long bm_fo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) /* bm_find_next variants for use while you hold drbd_bm_lock() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) extern unsigned long _drbd_bm_find_next(struct drbd_device *device, unsigned long bm_fo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) extern unsigned long _drbd_bm_find_next_zero(struct drbd_device *device, unsigned long bm_fo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) extern unsigned long _drbd_bm_total_weight(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) extern unsigned long drbd_bm_total_weight(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) /* for receive_bitmap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) extern void drbd_bm_merge_lel(struct drbd_device *device, size_t offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) size_t number, unsigned long *buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) /* for _drbd_send_bitmap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) extern void drbd_bm_get_lel(struct drbd_device *device, size_t offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) size_t number, unsigned long *buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) extern void drbd_bm_lock(struct drbd_device *device, char *why, enum bm_flag flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) extern void drbd_bm_unlock(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) /* drbd_main.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) extern struct kmem_cache *drbd_request_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) extern struct kmem_cache *drbd_ee_cache; /* peer requests */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) extern struct kmem_cache *drbd_bm_ext_cache; /* bitmap extents */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) extern struct kmem_cache *drbd_al_ext_cache; /* activity log extents */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) extern mempool_t drbd_request_mempool;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) extern mempool_t drbd_ee_mempool;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) /* drbd's page pool, used to buffer data received from the peer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) * or data requested by the peer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) * This does not have an emergency reserve.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) * When allocating from this pool, it first takes pages from the pool.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) * Only if the pool is depleted will try to allocate from the system.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) * The assumption is that pages taken from this pool will be processed,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) * and given back, "quickly", and then can be recycled, so we can avoid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) * frequent calls to alloc_page(), and still will be able to make progress even
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407) * under memory pressure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) extern struct page *drbd_pp_pool;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) extern spinlock_t drbd_pp_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) extern int drbd_pp_vacant;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) extern wait_queue_head_t drbd_pp_wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) /* We also need a standard (emergency-reserve backed) page pool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) * for meta data IO (activity log, bitmap).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) * We can keep it global, as long as it is used as "N pages at a time".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) * 128 should be plenty, currently we probably can get away with as few as 1.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) #define DRBD_MIN_POOL_PAGES 128
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) extern mempool_t drbd_md_io_page_pool;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) /* We also need to make sure we get a bio
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) * when we need it for housekeeping purposes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) extern struct bio_set drbd_md_io_bio_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) /* to allocate from that set */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) extern struct bio *bio_alloc_drbd(gfp_t gfp_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) /* And a bio_set for cloning */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) extern struct bio_set drbd_io_bio_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) extern struct mutex resources_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) extern int conn_lowest_minor(struct drbd_connection *connection);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) extern enum drbd_ret_code drbd_create_device(struct drbd_config_context *adm_ctx, unsigned int minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) extern void drbd_destroy_device(struct kref *kref);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) extern void drbd_delete_device(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) extern struct drbd_resource *drbd_create_resource(const char *name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) extern void drbd_free_resource(struct drbd_resource *resource);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) extern int set_resource_options(struct drbd_resource *resource, struct res_opts *res_opts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) extern struct drbd_connection *conn_create(const char *name, struct res_opts *res_opts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) extern void drbd_destroy_connection(struct kref *kref);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) extern struct drbd_connection *conn_get_by_addrs(void *my_addr, int my_addr_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) void *peer_addr, int peer_addr_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) extern struct drbd_resource *drbd_find_resource(const char *name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) extern void drbd_destroy_resource(struct kref *kref);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) extern void conn_free_crypto(struct drbd_connection *connection);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450) /* drbd_req */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) extern void do_submit(struct work_struct *ws);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) extern void __drbd_make_request(struct drbd_device *, struct bio *, unsigned long);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) extern blk_qc_t drbd_submit_bio(struct bio *bio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) extern int drbd_read_remote(struct drbd_device *device, struct drbd_request *req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) extern int is_valid_ar_handle(struct drbd_request *, sector_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458) /* drbd_nl.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) extern struct mutex notification_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) extern void drbd_suspend_io(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) extern void drbd_resume_io(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) extern char *ppsize(char *buf, unsigned long long size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) extern sector_t drbd_new_dev_size(struct drbd_device *, struct drbd_backing_dev *, sector_t, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) enum determine_dev_size {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) DS_ERROR_SHRINK = -3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) DS_ERROR_SPACE_MD = -2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) DS_ERROR = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) DS_UNCHANGED = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) DS_SHRUNK = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) DS_GREW = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) DS_GREW_FROM_ZERO = 3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) extern enum determine_dev_size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) drbd_determine_dev_size(struct drbd_device *, enum dds_flags, struct resize_parms *) __must_hold(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) extern void resync_after_online_grow(struct drbd_device *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) extern void drbd_reconsider_queue_parameters(struct drbd_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) struct drbd_backing_dev *bdev, struct o_qlim *o);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) extern enum drbd_state_rv drbd_set_role(struct drbd_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481) enum drbd_role new_role,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) int force);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) extern bool conn_try_outdate_peer(struct drbd_connection *connection);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) extern void conn_try_outdate_peer_async(struct drbd_connection *connection);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) extern enum drbd_peer_state conn_khelper(struct drbd_connection *connection, char *cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) extern int drbd_khelper(struct drbd_device *device, char *cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) /* drbd_worker.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) /* bi_end_io handlers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) extern void drbd_md_endio(struct bio *bio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) extern void drbd_peer_request_endio(struct bio *bio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) extern void drbd_request_endio(struct bio *bio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) extern int drbd_worker(struct drbd_thread *thi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) enum drbd_ret_code drbd_resync_after_valid(struct drbd_device *device, int o_minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) void drbd_resync_after_changed(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) extern void drbd_start_resync(struct drbd_device *device, enum drbd_conns side);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) extern void resume_next_sg(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) extern void suspend_other_sg(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) extern int drbd_resync_finished(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) /* maybe rather drbd_main.c ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) extern void *drbd_md_get_buffer(struct drbd_device *device, const char *intent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) extern void drbd_md_put_buffer(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) extern int drbd_md_sync_page_io(struct drbd_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504) struct drbd_backing_dev *bdev, sector_t sector, int op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) extern void drbd_ov_out_of_sync_found(struct drbd_device *, sector_t, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) extern void wait_until_done_or_force_detached(struct drbd_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) struct drbd_backing_dev *bdev, unsigned int *done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) extern void drbd_rs_controller_reset(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) static inline void ov_out_of_sync_print(struct drbd_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) if (device->ov_last_oos_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) drbd_err(device, "Out of sync: start=%llu, size=%lu (sectors)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) (unsigned long long)device->ov_last_oos_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) (unsigned long)device->ov_last_oos_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517) device->ov_last_oos_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) extern void drbd_csum_bio(struct crypto_shash *, struct bio *, void *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) extern void drbd_csum_ee(struct crypto_shash *, struct drbd_peer_request *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) void *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) /* worker callbacks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) extern int w_e_end_data_req(struct drbd_work *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) extern int w_e_end_rsdata_req(struct drbd_work *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) extern int w_e_end_csum_rs_req(struct drbd_work *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) extern int w_e_end_ov_reply(struct drbd_work *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529) extern int w_e_end_ov_req(struct drbd_work *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) extern int w_ov_finished(struct drbd_work *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) extern int w_resync_timer(struct drbd_work *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) extern int w_send_write_hint(struct drbd_work *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) extern int w_send_dblock(struct drbd_work *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) extern int w_send_read_req(struct drbd_work *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) extern int w_e_reissue(struct drbd_work *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) extern int w_restart_disk_io(struct drbd_work *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) extern int w_send_out_of_sync(struct drbd_work *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) extern int w_start_resync(struct drbd_work *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) extern void resync_timer_fn(struct timer_list *t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) extern void start_resync_timer_fn(struct timer_list *t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) extern void drbd_endio_write_sec_final(struct drbd_peer_request *peer_req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) /* drbd_receiver.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) extern int drbd_issue_discard_or_zero_out(struct drbd_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) sector_t start, unsigned int nr_sectors, int flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) extern int drbd_receiver(struct drbd_thread *thi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) extern int drbd_ack_receiver(struct drbd_thread *thi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550) extern void drbd_send_ping_wf(struct work_struct *ws);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) extern void drbd_send_acks_wf(struct work_struct *ws);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) extern bool drbd_rs_c_min_rate_throttle(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) extern bool drbd_rs_should_slow_down(struct drbd_device *device, sector_t sector,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) bool throttle_if_app_is_waiting);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) extern int drbd_submit_peer_request(struct drbd_device *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) struct drbd_peer_request *, const unsigned,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) const unsigned, const int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) extern int drbd_free_peer_reqs(struct drbd_device *, struct list_head *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) extern struct drbd_peer_request *drbd_alloc_peer_req(struct drbd_peer_device *, u64,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) sector_t, unsigned int,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) unsigned int,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) gfp_t) __must_hold(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) extern void __drbd_free_peer_req(struct drbd_device *, struct drbd_peer_request *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) #define drbd_free_peer_req(m,e) __drbd_free_peer_req(m, e, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) #define drbd_free_net_peer_req(m,e) __drbd_free_peer_req(m, e, 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) extern struct page *drbd_alloc_pages(struct drbd_peer_device *, unsigned int, bool);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) extern void drbd_set_recv_tcq(struct drbd_device *device, int tcq_enabled);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569) extern void _drbd_clear_done_ee(struct drbd_device *device, struct list_head *to_be_freed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) extern int drbd_connected(struct drbd_peer_device *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) /* sets the number of 512 byte sectors of our virtual device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) void drbd_set_my_capacity(struct drbd_device *device, sector_t size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) * used to submit our private bio
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) static inline void drbd_submit_bio_noacct(struct drbd_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) int fault_type, struct bio *bio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) __release(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) if (!bio->bi_disk) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) drbd_err(device, "drbd_submit_bio_noacct: bio->bi_disk == NULL\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) bio->bi_status = BLK_STS_IOERR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) bio_endio(bio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) if (drbd_insert_fault(device, fault_type))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) bio_io_error(bio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) submit_bio_noacct(bio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) void drbd_bump_write_ordering(struct drbd_resource *resource, struct drbd_backing_dev *bdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) enum write_ordering_e wo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) /* drbd_proc.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) extern struct proc_dir_entry *drbd_proc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) int drbd_seq_show(struct seq_file *seq, void *v);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) /* drbd_actlog.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) extern bool drbd_al_begin_io_prepare(struct drbd_device *device, struct drbd_interval *i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) extern int drbd_al_begin_io_nonblock(struct drbd_device *device, struct drbd_interval *i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) extern void drbd_al_begin_io_commit(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) extern bool drbd_al_begin_io_fastpath(struct drbd_device *device, struct drbd_interval *i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) extern void drbd_al_begin_io(struct drbd_device *device, struct drbd_interval *i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) extern void drbd_al_complete_io(struct drbd_device *device, struct drbd_interval *i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) extern void drbd_rs_complete_io(struct drbd_device *device, sector_t sector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610) extern int drbd_rs_begin_io(struct drbd_device *device, sector_t sector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) extern int drbd_try_rs_begin_io(struct drbd_device *device, sector_t sector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) extern void drbd_rs_cancel_all(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) extern int drbd_rs_del_all(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) extern void drbd_rs_failed_io(struct drbd_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) sector_t sector, int size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) extern void drbd_advance_rs_marks(struct drbd_device *device, unsigned long still_to_go);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) enum update_sync_bits_mode { RECORD_RS_FAILED, SET_OUT_OF_SYNC, SET_IN_SYNC };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) extern int __drbd_change_sync(struct drbd_device *device, sector_t sector, int size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) enum update_sync_bits_mode mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) #define drbd_set_in_sync(device, sector, size) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) __drbd_change_sync(device, sector, size, SET_IN_SYNC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623) #define drbd_set_out_of_sync(device, sector, size) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) __drbd_change_sync(device, sector, size, SET_OUT_OF_SYNC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) #define drbd_rs_failed_io(device, sector, size) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) __drbd_change_sync(device, sector, size, RECORD_RS_FAILED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) extern void drbd_al_shrink(struct drbd_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) extern int drbd_al_initialize(struct drbd_device *, void *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) /* drbd_nl.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) /* state info broadcast */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) struct sib_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) enum drbd_state_info_bcast_reason sib_reason;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) char *helper_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) unsigned helper_exit_code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) union drbd_state os;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) union drbd_state ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) void drbd_bcast_event(struct drbd_device *device, const struct sib_info *sib);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) extern void notify_resource_state(struct sk_buff *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648) unsigned int,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) struct drbd_resource *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) struct resource_info *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651) enum drbd_notification_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) extern void notify_device_state(struct sk_buff *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) unsigned int,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) struct drbd_device *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) struct device_info *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) enum drbd_notification_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657) extern void notify_connection_state(struct sk_buff *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) unsigned int,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) struct drbd_connection *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660) struct connection_info *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) enum drbd_notification_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) extern void notify_peer_device_state(struct sk_buff *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) unsigned int,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664) struct drbd_peer_device *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) struct peer_device_info *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666) enum drbd_notification_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667) extern void notify_helper(enum drbd_notification_type, struct drbd_device *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668) struct drbd_connection *, const char *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671) * inline helper functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) *************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674) /* see also page_chain_add and friends in drbd_receiver.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675) static inline struct page *page_chain_next(struct page *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677) return (struct page *)page_private(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679) #define page_chain_for_each(page) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680) for (; page && ({ prefetch(page_chain_next(page)); 1; }); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681) page = page_chain_next(page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682) #define page_chain_for_each_safe(page, n) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683) for (; page && ({ n = page_chain_next(page); 1; }); page = n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686) static inline int drbd_peer_req_has_active_page(struct drbd_peer_request *peer_req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688) struct page *page = peer_req->pages;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689) page_chain_for_each(page) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690) if (page_count(page) > 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696) static inline union drbd_state drbd_read_state(struct drbd_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698) struct drbd_resource *resource = device->resource;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699) union drbd_state rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701) rv.i = device->state.i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702) rv.susp = resource->susp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703) rv.susp_nod = resource->susp_nod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704) rv.susp_fen = resource->susp_fen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) return rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) enum drbd_force_detach_flags {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710) DRBD_READ_ERROR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711) DRBD_WRITE_ERROR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712) DRBD_META_IO_ERROR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713) DRBD_FORCE_DETACH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716) #define __drbd_chk_io_error(m,f) __drbd_chk_io_error_(m,f, __func__)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717) static inline void __drbd_chk_io_error_(struct drbd_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718) enum drbd_force_detach_flags df,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719) const char *where)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1720) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1721) enum drbd_io_error_p ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1722)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1723) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1724) ep = rcu_dereference(device->ldev->disk_conf)->on_io_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1725) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1726) switch (ep) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1727) case EP_PASS_ON: /* FIXME would this be better named "Ignore"? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1728) if (df == DRBD_READ_ERROR || df == DRBD_WRITE_ERROR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1729) if (__ratelimit(&drbd_ratelimit_state))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1730) drbd_err(device, "Local IO failed in %s.\n", where);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1731) if (device->state.disk > D_INCONSISTENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1732) _drbd_set_state(_NS(device, disk, D_INCONSISTENT), CS_HARD, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1733) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1734) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1735) fallthrough; /* for DRBD_META_IO_ERROR or DRBD_FORCE_DETACH */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1736) case EP_DETACH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1737) case EP_CALL_HELPER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1738) /* Remember whether we saw a READ or WRITE error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1739) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1740) * Recovery of the affected area for WRITE failure is covered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1741) * by the activity log.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1742) * READ errors may fall outside that area though. Certain READ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1743) * errors can be "healed" by writing good data to the affected
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1744) * blocks, which triggers block re-allocation in lower layers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1745) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1746) * If we can not write the bitmap after a READ error,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1747) * we may need to trigger a full sync (see w_go_diskless()).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1748) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1749) * Force-detach is not really an IO error, but rather a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1750) * desperate measure to try to deal with a completely
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1751) * unresponsive lower level IO stack.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1752) * Still it should be treated as a WRITE error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1753) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1754) * Meta IO error is always WRITE error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1755) * we read meta data only once during attach,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1756) * which will fail in case of errors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1757) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1758) set_bit(WAS_IO_ERROR, &device->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1759) if (df == DRBD_READ_ERROR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1760) set_bit(WAS_READ_ERROR, &device->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1761) if (df == DRBD_FORCE_DETACH)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1762) set_bit(FORCE_DETACH, &device->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1763) if (device->state.disk > D_FAILED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1764) _drbd_set_state(_NS(device, disk, D_FAILED), CS_HARD, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1765) drbd_err(device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1766) "Local IO failed in %s. Detaching...\n", where);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1767) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1768) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1769) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1770) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1771)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1772) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1773) * drbd_chk_io_error: Handle the on_io_error setting, should be called from all io completion handlers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1774) * @device: DRBD device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1775) * @error: Error code passed to the IO completion callback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1776) * @forcedetach: Force detach. I.e. the error happened while accessing the meta data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1777) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1778) * See also drbd_main.c:after_state_ch() if (os.disk > D_FAILED && ns.disk == D_FAILED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1779) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1780) #define drbd_chk_io_error(m,e,f) drbd_chk_io_error_(m,e,f, __func__)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1781) static inline void drbd_chk_io_error_(struct drbd_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1782) int error, enum drbd_force_detach_flags forcedetach, const char *where)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1783) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1784) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1785) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1786) spin_lock_irqsave(&device->resource->req_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1787) __drbd_chk_io_error_(device, forcedetach, where);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1788) spin_unlock_irqrestore(&device->resource->req_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1789) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1790) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1791)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1792)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1793) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1794) * drbd_md_first_sector() - Returns the first sector number of the meta data area
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1795) * @bdev: Meta data block device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1796) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1797) * BTW, for internal meta data, this happens to be the maximum capacity
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1798) * we could agree upon with our peer node.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1799) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1800) static inline sector_t drbd_md_first_sector(struct drbd_backing_dev *bdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1801) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1802) switch (bdev->md.meta_dev_idx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1803) case DRBD_MD_INDEX_INTERNAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1804) case DRBD_MD_INDEX_FLEX_INT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1805) return bdev->md.md_offset + bdev->md.bm_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1806) case DRBD_MD_INDEX_FLEX_EXT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1807) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1808) return bdev->md.md_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1809) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1810) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1811)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1812) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1813) * drbd_md_last_sector() - Return the last sector number of the meta data area
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1814) * @bdev: Meta data block device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1815) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1816) static inline sector_t drbd_md_last_sector(struct drbd_backing_dev *bdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1817) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1818) switch (bdev->md.meta_dev_idx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1819) case DRBD_MD_INDEX_INTERNAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1820) case DRBD_MD_INDEX_FLEX_INT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1821) return bdev->md.md_offset + MD_4kB_SECT -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1822) case DRBD_MD_INDEX_FLEX_EXT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1823) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1824) return bdev->md.md_offset + bdev->md.md_size_sect -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1825) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1826) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1827)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1828) /* Returns the number of 512 byte sectors of the device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1829) static inline sector_t drbd_get_capacity(struct block_device *bdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1830) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1831) /* return bdev ? get_capacity(bdev->bd_disk) : 0; */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1832) return bdev ? i_size_read(bdev->bd_inode) >> 9 : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1833) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1834)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1835) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1836) * drbd_get_max_capacity() - Returns the capacity we announce to out peer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1837) * @bdev: Meta data block device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1838) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1839) * returns the capacity we announce to out peer. we clip ourselves at the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1840) * various MAX_SECTORS, because if we don't, current implementation will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1841) * oops sooner or later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1842) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1843) static inline sector_t drbd_get_max_capacity(struct drbd_backing_dev *bdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1844) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1845) sector_t s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1847) switch (bdev->md.meta_dev_idx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1848) case DRBD_MD_INDEX_INTERNAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1849) case DRBD_MD_INDEX_FLEX_INT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1850) s = drbd_get_capacity(bdev->backing_bdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1851) ? min_t(sector_t, DRBD_MAX_SECTORS_FLEX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1852) drbd_md_first_sector(bdev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1853) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1854) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1855) case DRBD_MD_INDEX_FLEX_EXT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1856) s = min_t(sector_t, DRBD_MAX_SECTORS_FLEX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1857) drbd_get_capacity(bdev->backing_bdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1858) /* clip at maximum size the meta device can support */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1859) s = min_t(sector_t, s,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1860) BM_EXT_TO_SECT(bdev->md.md_size_sect
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1861) - bdev->md.bm_offset));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1862) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1863) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1864) s = min_t(sector_t, DRBD_MAX_SECTORS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1865) drbd_get_capacity(bdev->backing_bdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1866) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1867) return s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1868) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1869)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1870) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1871) * drbd_md_ss() - Return the sector number of our meta data super block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1872) * @bdev: Meta data block device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1873) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1874) static inline sector_t drbd_md_ss(struct drbd_backing_dev *bdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1875) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1876) const int meta_dev_idx = bdev->md.meta_dev_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1877)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1878) if (meta_dev_idx == DRBD_MD_INDEX_FLEX_EXT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1879) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1880)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1881) /* Since drbd08, internal meta data is always "flexible".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1882) * position: last 4k aligned block of 4k size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1883) if (meta_dev_idx == DRBD_MD_INDEX_INTERNAL ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1884) meta_dev_idx == DRBD_MD_INDEX_FLEX_INT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1885) return (drbd_get_capacity(bdev->backing_bdev) & ~7ULL) - 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1886)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1887) /* external, some index; this is the old fixed size layout */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1888) return MD_128MB_SECT * bdev->md.meta_dev_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1889) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1890)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1891) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1892) drbd_queue_work(struct drbd_work_queue *q, struct drbd_work *w)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1893) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1894) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1895) spin_lock_irqsave(&q->q_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1896) list_add_tail(&w->list, &q->q);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1897) spin_unlock_irqrestore(&q->q_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1898) wake_up(&q->q_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1899) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1900)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1901) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1902) drbd_queue_work_if_unqueued(struct drbd_work_queue *q, struct drbd_work *w)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1903) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1904) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1905) spin_lock_irqsave(&q->q_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1906) if (list_empty_careful(&w->list))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1907) list_add_tail(&w->list, &q->q);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1908) spin_unlock_irqrestore(&q->q_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1909) wake_up(&q->q_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1910) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1911)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1912) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1913) drbd_device_post_work(struct drbd_device *device, int work_bit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1914) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1915) if (!test_and_set_bit(work_bit, &device->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1916) struct drbd_connection *connection =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1917) first_peer_device(device)->connection;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1918) struct drbd_work_queue *q = &connection->sender_work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1919) if (!test_and_set_bit(DEVICE_WORK_PENDING, &connection->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1920) wake_up(&q->q_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1921) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1922) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1923)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1924) extern void drbd_flush_workqueue(struct drbd_work_queue *work_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1925)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1926) /* To get the ack_receiver out of the blocking network stack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1927) * so it can change its sk_rcvtimeo from idle- to ping-timeout,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1928) * and send a ping, we need to send a signal.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1929) * Which signal we send is irrelevant. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1930) static inline void wake_ack_receiver(struct drbd_connection *connection)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1931) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1932) struct task_struct *task = connection->ack_receiver.task;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1933) if (task && get_t_state(&connection->ack_receiver) == RUNNING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1934) send_sig(SIGXCPU, task, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1935) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1936)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1937) static inline void request_ping(struct drbd_connection *connection)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1938) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1939) set_bit(SEND_PING, &connection->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1940) wake_ack_receiver(connection);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1941) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1942)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1943) extern void *conn_prepare_command(struct drbd_connection *, struct drbd_socket *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1944) extern void *drbd_prepare_command(struct drbd_peer_device *, struct drbd_socket *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1945) extern int conn_send_command(struct drbd_connection *, struct drbd_socket *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1946) enum drbd_packet, unsigned int, void *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1947) unsigned int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1948) extern int drbd_send_command(struct drbd_peer_device *, struct drbd_socket *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1949) enum drbd_packet, unsigned int, void *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1950) unsigned int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1951)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1952) extern int drbd_send_ping(struct drbd_connection *connection);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1953) extern int drbd_send_ping_ack(struct drbd_connection *connection);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1954) extern int drbd_send_state_req(struct drbd_peer_device *, union drbd_state, union drbd_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1955) extern int conn_send_state_req(struct drbd_connection *, union drbd_state, union drbd_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1956)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1957) static inline void drbd_thread_stop(struct drbd_thread *thi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1958) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1959) _drbd_thread_stop(thi, false, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1960) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1961)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1962) static inline void drbd_thread_stop_nowait(struct drbd_thread *thi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1963) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1964) _drbd_thread_stop(thi, false, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1965) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1966)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1967) static inline void drbd_thread_restart_nowait(struct drbd_thread *thi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1968) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1969) _drbd_thread_stop(thi, true, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1970) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1971)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1972) /* counts how many answer packets packets we expect from our peer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1973) * for either explicit application requests,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1974) * or implicit barrier packets as necessary.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1975) * increased:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1976) * w_send_barrier
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1977) * _req_mod(req, QUEUE_FOR_NET_WRITE or QUEUE_FOR_NET_READ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1978) * it is much easier and equally valid to count what we queue for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1979) * worker, even before it actually was queued or send.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1980) * (drbd_make_request_common; recovery path on read io-error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1981) * decreased:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1982) * got_BarrierAck (respective tl_clear, tl_clear_barrier)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1983) * _req_mod(req, DATA_RECEIVED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1984) * [from receive_DataReply]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1985) * _req_mod(req, WRITE_ACKED_BY_PEER or RECV_ACKED_BY_PEER or NEG_ACKED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1986) * [from got_BlockAck (P_WRITE_ACK, P_RECV_ACK)]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1987) * for some reason it is NOT decreased in got_NegAck,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1988) * but in the resulting cleanup code from report_params.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1989) * we should try to remember the reason for that...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1990) * _req_mod(req, SEND_FAILED or SEND_CANCELED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1991) * _req_mod(req, CONNECTION_LOST_WHILE_PENDING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1992) * [from tl_clear_barrier]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1993) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1994) static inline void inc_ap_pending(struct drbd_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1995) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1996) atomic_inc(&device->ap_pending_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1997) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1998)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1999) #define ERR_IF_CNT_IS_NEGATIVE(which, func, line) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2000) if (atomic_read(&device->which) < 0) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2001) drbd_err(device, "in %s:%d: " #which " = %d < 0 !\n", \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2002) func, line, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2003) atomic_read(&device->which))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2004)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2005) #define dec_ap_pending(device) _dec_ap_pending(device, __func__, __LINE__)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2006) static inline void _dec_ap_pending(struct drbd_device *device, const char *func, int line)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2007) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2008) if (atomic_dec_and_test(&device->ap_pending_cnt))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2009) wake_up(&device->misc_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2010) ERR_IF_CNT_IS_NEGATIVE(ap_pending_cnt, func, line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2011) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2012)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2013) /* counts how many resync-related answers we still expect from the peer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2014) * increase decrease
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2015) * C_SYNC_TARGET sends P_RS_DATA_REQUEST (and expects P_RS_DATA_REPLY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2016) * C_SYNC_SOURCE sends P_RS_DATA_REPLY (and expects P_WRITE_ACK with ID_SYNCER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2017) * (or P_NEG_ACK with ID_SYNCER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2018) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2019) static inline void inc_rs_pending(struct drbd_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2020) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2021) atomic_inc(&device->rs_pending_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2022) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2023)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2024) #define dec_rs_pending(device) _dec_rs_pending(device, __func__, __LINE__)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2025) static inline void _dec_rs_pending(struct drbd_device *device, const char *func, int line)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2026) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2027) atomic_dec(&device->rs_pending_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2028) ERR_IF_CNT_IS_NEGATIVE(rs_pending_cnt, func, line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2029) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2030)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2031) /* counts how many answers we still need to send to the peer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2032) * increased on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2033) * receive_Data unless protocol A;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2034) * we need to send a P_RECV_ACK (proto B)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2035) * or P_WRITE_ACK (proto C)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2036) * receive_RSDataReply (recv_resync_read) we need to send a P_WRITE_ACK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2037) * receive_DataRequest (receive_RSDataRequest) we need to send back P_DATA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2038) * receive_Barrier_* we need to send a P_BARRIER_ACK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2039) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2040) static inline void inc_unacked(struct drbd_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2041) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2042) atomic_inc(&device->unacked_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2043) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2044)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2045) #define dec_unacked(device) _dec_unacked(device, __func__, __LINE__)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2046) static inline void _dec_unacked(struct drbd_device *device, const char *func, int line)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2047) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2048) atomic_dec(&device->unacked_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2049) ERR_IF_CNT_IS_NEGATIVE(unacked_cnt, func, line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2050) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2051)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2052) #define sub_unacked(device, n) _sub_unacked(device, n, __func__, __LINE__)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2053) static inline void _sub_unacked(struct drbd_device *device, int n, const char *func, int line)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2054) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2055) atomic_sub(n, &device->unacked_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2056) ERR_IF_CNT_IS_NEGATIVE(unacked_cnt, func, line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2057) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2058)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2059) static inline bool is_sync_target_state(enum drbd_conns connection_state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2060) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2061) return connection_state == C_SYNC_TARGET ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2062) connection_state == C_PAUSED_SYNC_T;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2063) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2064)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2065) static inline bool is_sync_source_state(enum drbd_conns connection_state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2066) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2067) return connection_state == C_SYNC_SOURCE ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2068) connection_state == C_PAUSED_SYNC_S;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2069) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2070)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2071) static inline bool is_sync_state(enum drbd_conns connection_state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2072) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2073) return is_sync_source_state(connection_state) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2074) is_sync_target_state(connection_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2075) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2076)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2077) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2078) * get_ldev() - Increase the ref count on device->ldev. Returns 0 if there is no ldev
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2079) * @_device: DRBD device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2080) * @_min_state: Minimum device state required for success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2081) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2082) * You have to call put_ldev() when finished working with device->ldev.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2083) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2084) #define get_ldev_if_state(_device, _min_state) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2085) (_get_ldev_if_state((_device), (_min_state)) ? \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2086) ({ __acquire(x); true; }) : false)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2087) #define get_ldev(_device) get_ldev_if_state(_device, D_INCONSISTENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2088)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2089) static inline void put_ldev(struct drbd_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2090) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2091) enum drbd_disk_state disk_state = device->state.disk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2092) /* We must check the state *before* the atomic_dec becomes visible,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2093) * or we have a theoretical race where someone hitting zero,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2094) * while state still D_FAILED, will then see D_DISKLESS in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2095) * condition below and calling into destroy, where he must not, yet. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2096) int i = atomic_dec_return(&device->local_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2097)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2098) /* This may be called from some endio handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2099) * so we must not sleep here. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2101) __release(local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2102) D_ASSERT(device, i >= 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2103) if (i == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2104) if (disk_state == D_DISKLESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2105) /* even internal references gone, safe to destroy */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2106) drbd_device_post_work(device, DESTROY_DISK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2107) if (disk_state == D_FAILED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2108) /* all application IO references gone. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2109) if (!test_and_set_bit(GOING_DISKLESS, &device->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2110) drbd_device_post_work(device, GO_DISKLESS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2111) wake_up(&device->misc_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2115) #ifndef __CHECKER__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2116) static inline int _get_ldev_if_state(struct drbd_device *device, enum drbd_disk_state mins)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2118) int io_allowed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2120) /* never get a reference while D_DISKLESS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2121) if (device->state.disk == D_DISKLESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2122) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2124) atomic_inc(&device->local_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2125) io_allowed = (device->state.disk >= mins);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2126) if (!io_allowed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2127) put_ldev(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2128) return io_allowed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2130) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2131) extern int _get_ldev_if_state(struct drbd_device *device, enum drbd_disk_state mins);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2132) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2134) /* this throttles on-the-fly application requests
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2135) * according to max_buffers settings;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2136) * maybe re-implement using semaphores? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2137) static inline int drbd_get_max_buffers(struct drbd_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2139) struct net_conf *nc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2140) int mxb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2142) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2143) nc = rcu_dereference(first_peer_device(device)->connection->net_conf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2144) mxb = nc ? nc->max_buffers : 1000000; /* arbitrary limit on open requests */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2145) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2147) return mxb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2150) static inline int drbd_state_is_stable(struct drbd_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2152) union drbd_dev_state s = device->state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2154) /* DO NOT add a default clause, we want the compiler to warn us
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2155) * for any newly introduced state we may have forgotten to add here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2157) switch ((enum drbd_conns)s.conn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2158) /* new io only accepted when there is no connection, ... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2159) case C_STANDALONE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2160) case C_WF_CONNECTION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2161) /* ... or there is a well established connection. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2162) case C_CONNECTED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2163) case C_SYNC_SOURCE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2164) case C_SYNC_TARGET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2165) case C_VERIFY_S:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2166) case C_VERIFY_T:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2167) case C_PAUSED_SYNC_S:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2168) case C_PAUSED_SYNC_T:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2169) case C_AHEAD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2170) case C_BEHIND:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2171) /* transitional states, IO allowed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2172) case C_DISCONNECTING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2173) case C_UNCONNECTED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2174) case C_TIMEOUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2175) case C_BROKEN_PIPE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2176) case C_NETWORK_FAILURE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2177) case C_PROTOCOL_ERROR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2178) case C_TEAR_DOWN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2179) case C_WF_REPORT_PARAMS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2180) case C_STARTING_SYNC_S:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2181) case C_STARTING_SYNC_T:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2182) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2184) /* Allow IO in BM exchange states with new protocols */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2185) case C_WF_BITMAP_S:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2186) if (first_peer_device(device)->connection->agreed_pro_version < 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2187) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2188) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2190) /* no new io accepted in these states */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2191) case C_WF_BITMAP_T:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2192) case C_WF_SYNC_UUID:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2193) case C_MASK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2194) /* not "stable" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2195) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2198) switch ((enum drbd_disk_state)s.disk) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2199) case D_DISKLESS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2200) case D_INCONSISTENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2201) case D_OUTDATED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2202) case D_CONSISTENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2203) case D_UP_TO_DATE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2204) case D_FAILED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2205) /* disk state is stable as well. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2206) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2208) /* no new io accepted during transitional states */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2209) case D_ATTACHING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2210) case D_NEGOTIATING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2211) case D_UNKNOWN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2212) case D_MASK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2213) /* not "stable" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2214) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2217) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2220) static inline int drbd_suspended(struct drbd_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2221) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2222) struct drbd_resource *resource = device->resource;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2224) return resource->susp || resource->susp_fen || resource->susp_nod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2227) static inline bool may_inc_ap_bio(struct drbd_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2229) int mxb = drbd_get_max_buffers(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2231) if (drbd_suspended(device))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2232) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2233) if (atomic_read(&device->suspend_cnt))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2234) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2236) /* to avoid potential deadlock or bitmap corruption,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2237) * in various places, we only allow new application io
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2238) * to start during "stable" states. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2240) /* no new io accepted when attaching or detaching the disk */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2241) if (!drbd_state_is_stable(device))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2242) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2244) /* since some older kernels don't have atomic_add_unless,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2245) * and we are within the spinlock anyways, we have this workaround. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2246) if (atomic_read(&device->ap_bio_cnt) > mxb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2247) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2248) if (test_bit(BITMAP_IO, &device->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2249) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2250) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2253) static inline bool inc_ap_bio_cond(struct drbd_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2254) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2255) bool rv = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2257) spin_lock_irq(&device->resource->req_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2258) rv = may_inc_ap_bio(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2259) if (rv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2260) atomic_inc(&device->ap_bio_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2261) spin_unlock_irq(&device->resource->req_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2263) return rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2266) static inline void inc_ap_bio(struct drbd_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2267) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2268) /* we wait here
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2269) * as long as the device is suspended
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2270) * until the bitmap is no longer on the fly during connection
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2271) * handshake as long as we would exceed the max_buffer limit.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2272) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2273) * to avoid races with the reconnect code,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2274) * we need to atomic_inc within the spinlock. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2276) wait_event(device->misc_wait, inc_ap_bio_cond(device));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2279) static inline void dec_ap_bio(struct drbd_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2280) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2281) int mxb = drbd_get_max_buffers(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2282) int ap_bio = atomic_dec_return(&device->ap_bio_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2284) D_ASSERT(device, ap_bio >= 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2286) if (ap_bio == 0 && test_bit(BITMAP_IO, &device->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2287) if (!test_and_set_bit(BITMAP_IO_QUEUED, &device->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2288) drbd_queue_work(&first_peer_device(device)->
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2289) connection->sender_work,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2290) &device->bm_io_work.w);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2293) /* this currently does wake_up for every dec_ap_bio!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2294) * maybe rather introduce some type of hysteresis?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2295) * e.g. (ap_bio == mxb/2 || ap_bio == 0) ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2296) if (ap_bio < mxb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2297) wake_up(&device->misc_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2298) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2300) static inline bool verify_can_do_stop_sector(struct drbd_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2301) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2302) return first_peer_device(device)->connection->agreed_pro_version >= 97 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2303) first_peer_device(device)->connection->agreed_pro_version != 100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2306) static inline int drbd_set_ed_uuid(struct drbd_device *device, u64 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2307) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2308) int changed = device->ed_uuid != val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2309) device->ed_uuid = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2310) return changed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2311) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2313) static inline int drbd_queue_order_type(struct drbd_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2314) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2315) /* sorry, we currently have no working implementation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2316) * of distributed TCQ stuff */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2317) #ifndef QUEUE_ORDERED_NONE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2318) #define QUEUE_ORDERED_NONE 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2319) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2320) return QUEUE_ORDERED_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2321) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2323) static inline struct drbd_connection *first_connection(struct drbd_resource *resource)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2324) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2325) return list_first_entry_or_null(&resource->connections,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2326) struct drbd_connection, connections);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2327) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2329) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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