Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #ifndef __GLOCK_DOT_H__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #define __GLOCK_DOT_H__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/parser.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include "incore.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include "util.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) /* Options for hostdata parser */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	Opt_jid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 	Opt_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	Opt_first,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	Opt_nodir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	Opt_err,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  * lm_lockname types
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #define LM_TYPE_RESERVED	0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define LM_TYPE_NONDISK		0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define LM_TYPE_INODE		0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define LM_TYPE_RGRP		0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define LM_TYPE_META		0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #define LM_TYPE_IOPEN		0x05
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define LM_TYPE_FLOCK		0x06
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #define LM_TYPE_PLOCK		0x07
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #define LM_TYPE_QUOTA		0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #define LM_TYPE_JOURNAL		0x09
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)  * lm_lock() states
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  * SHARED is compatible with SHARED, not with DEFERRED or EX.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44)  * DEFERRED is compatible with DEFERRED, not with SHARED or EX.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) #define LM_ST_UNLOCKED		0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) #define LM_ST_EXCLUSIVE		1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) #define LM_ST_DEFERRED		2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) #define LM_ST_SHARED		3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53)  * lm_lock() flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55)  * LM_FLAG_TRY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56)  * Don't wait to acquire the lock if it can't be granted immediately.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58)  * LM_FLAG_TRY_1CB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59)  * Send one blocking callback if TRY is set and the lock is not granted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61)  * LM_FLAG_NOEXP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62)  * GFS sets this flag on lock requests it makes while doing journal recovery.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63)  * These special requests should not be blocked due to the recovery like
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64)  * ordinary locks would be.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66)  * LM_FLAG_ANY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67)  * A SHARED request may also be granted in DEFERRED, or a DEFERRED request may
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68)  * also be granted in SHARED.  The preferred state is whichever is compatible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69)  * with other granted locks, or the specified state if no other locks exist.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71)  * LM_FLAG_PRIORITY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72)  * Override fairness considerations.  Suppose a lock is held in a shared state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73)  * and there is a pending request for the deferred state.  A shared lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74)  * request with the priority flag would be allowed to bypass the deferred
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75)  * request and directly join the other shared lock.  A shared lock request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76)  * without the priority flag might be forced to wait until the deferred
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77)  * requested had acquired and released the lock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) #define LM_FLAG_TRY		0x0001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) #define LM_FLAG_TRY_1CB		0x0002
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) #define LM_FLAG_NOEXP		0x0004
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) #define LM_FLAG_ANY		0x0008
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) #define LM_FLAG_PRIORITY	0x0010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) #define GL_ASYNC		0x0040
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) #define GL_EXACT		0x0080
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) #define GL_SKIP			0x0100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) #define GL_NOCACHE		0x0400
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89)   
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91)  * lm_async_cb return flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93)  * LM_OUT_ST_MASK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94)  * Masks the lower two bits of lock state in the returned value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96)  * LM_OUT_CANCELED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97)  * The lock request was canceled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) #define LM_OUT_ST_MASK		0x00000003
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) #define LM_OUT_CANCELED		0x00000008
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) #define LM_OUT_ERROR		0x00000004
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)  * lm_recovery_done() messages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #define LM_RD_GAVEUP		308
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) #define LM_RD_SUCCESS		309
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) #define GLR_TRYFAILED		13
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) #define GL_GLOCK_MAX_HOLD        (long)(HZ / 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) #define GL_GLOCK_DFT_HOLD        (long)(HZ / 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #define GL_GLOCK_MIN_HOLD        (long)(10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #define GL_GLOCK_HOLD_INCR       (long)(HZ / 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #define GL_GLOCK_HOLD_DECR       (long)(HZ / 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct lm_lockops {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	const char *lm_proto_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	int (*lm_mount) (struct gfs2_sbd *sdp, const char *table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	void (*lm_first_done) (struct gfs2_sbd *sdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	void (*lm_recovery_result) (struct gfs2_sbd *sdp, unsigned int jid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 				    unsigned int result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	void (*lm_unmount) (struct gfs2_sbd *sdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	void (*lm_withdraw) (struct gfs2_sbd *sdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	void (*lm_put_lock) (struct gfs2_glock *gl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	int (*lm_lock) (struct gfs2_glock *gl, unsigned int req_state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 			unsigned int flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	void (*lm_cancel) (struct gfs2_glock *gl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	const match_table_t *lm_tokens;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) extern struct workqueue_struct *gfs2_delete_workqueue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static inline struct gfs2_holder *gfs2_glock_is_locked_by_me(struct gfs2_glock *gl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	struct gfs2_holder *gh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	struct pid *pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	/* Look in glock's list of holders for one with current task as owner */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	spin_lock(&gl->gl_lockref.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	pid = task_pid(current);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	list_for_each_entry(gh, &gl->gl_holders, gh_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		if (!test_bit(HIF_HOLDER, &gh->gh_iflags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		if (gh->gh_owner_pid == pid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	gh = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	spin_unlock(&gl->gl_lockref.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	return gh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) static inline int gfs2_glock_is_held_excl(struct gfs2_glock *gl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	return gl->gl_state == LM_ST_EXCLUSIVE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static inline int gfs2_glock_is_held_dfrd(struct gfs2_glock *gl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	return gl->gl_state == LM_ST_DEFERRED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static inline int gfs2_glock_is_held_shrd(struct gfs2_glock *gl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	return gl->gl_state == LM_ST_SHARED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) static inline struct address_space *gfs2_glock2aspace(struct gfs2_glock *gl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	if (gl->gl_ops->go_flags & GLOF_ASPACE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		return (struct address_space *)(gl + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) extern int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 			  const struct gfs2_glock_operations *glops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 			  int create, struct gfs2_glock **glp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) extern void gfs2_glock_hold(struct gfs2_glock *gl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) extern void gfs2_glock_put(struct gfs2_glock *gl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) extern void gfs2_glock_queue_put(struct gfs2_glock *gl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) extern void gfs2_holder_init(struct gfs2_glock *gl, unsigned int state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 			     u16 flags, struct gfs2_holder *gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) extern void gfs2_holder_reinit(unsigned int state, u16 flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 			       struct gfs2_holder *gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) extern void gfs2_holder_uninit(struct gfs2_holder *gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) extern int gfs2_glock_nq(struct gfs2_holder *gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) extern int gfs2_glock_poll(struct gfs2_holder *gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) extern int gfs2_glock_wait(struct gfs2_holder *gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) extern int gfs2_glock_async_wait(unsigned int num_gh, struct gfs2_holder *ghs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) extern void gfs2_glock_dq(struct gfs2_holder *gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) extern void gfs2_glock_dq_wait(struct gfs2_holder *gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) extern void gfs2_glock_dq_uninit(struct gfs2_holder *gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) extern int gfs2_glock_nq_num(struct gfs2_sbd *sdp, u64 number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 			     const struct gfs2_glock_operations *glops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 			     unsigned int state, u16 flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 			     struct gfs2_holder *gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) extern int gfs2_glock_nq_m(unsigned int num_gh, struct gfs2_holder *ghs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) extern void gfs2_glock_dq_m(unsigned int num_gh, struct gfs2_holder *ghs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) extern void gfs2_dump_glock(struct seq_file *seq, struct gfs2_glock *gl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 			    bool fsid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) #define GLOCK_BUG_ON(gl,x) do { if (unlikely(x)) {		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 			gfs2_dump_glock(NULL, gl, true);	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 			BUG(); } } while(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) #define gfs2_glock_assert_warn(gl, x) do { if (unlikely(!(x))) {	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 			gfs2_dump_glock(NULL, gl, true);		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 			gfs2_assert_warn((gl)->gl_name.ln_sbd, (x)); } } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) #define gfs2_glock_assert_withdraw(gl, x) do { if (unlikely(!(x))) {	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 			gfs2_dump_glock(NULL, gl, true);		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 			gfs2_assert_withdraw((gl)->gl_name.ln_sbd, (x)); } } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) extern __printf(2, 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) void gfs2_print_dbg(struct seq_file *seq, const char *fmt, ...);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)  * gfs2_glock_nq_init - initialize a holder and enqueue it on a glock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)  * @gl: the glock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)  * @state: the state we're requesting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)  * @flags: the modifier flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)  * @gh: the holder structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)  * Returns: 0, GLR_*, or errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) static inline int gfs2_glock_nq_init(struct gfs2_glock *gl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 				     unsigned int state, u16 flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 				     struct gfs2_holder *gh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	gfs2_holder_init(gl, state, flags, gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	error = gfs2_glock_nq(gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		gfs2_holder_uninit(gh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) extern void gfs2_glock_cb(struct gfs2_glock *gl, unsigned int state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) extern void gfs2_glock_complete(struct gfs2_glock *gl, int ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) extern bool gfs2_queue_delete_work(struct gfs2_glock *gl, unsigned long delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) extern void gfs2_cancel_delete_work(struct gfs2_glock *gl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) extern bool gfs2_delete_work_queued(const struct gfs2_glock *gl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) extern void gfs2_flush_delete_work(struct gfs2_sbd *sdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) extern void gfs2_gl_hash_clear(struct gfs2_sbd *sdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) extern void gfs2_glock_finish_truncate(struct gfs2_inode *ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) extern void gfs2_glock_thaw(struct gfs2_sbd *sdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) extern void gfs2_glock_add_to_lru(struct gfs2_glock *gl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) extern void gfs2_glock_free(struct gfs2_glock *gl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) extern int __init gfs2_glock_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) extern void gfs2_glock_exit(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) extern void gfs2_create_debugfs_file(struct gfs2_sbd *sdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) extern void gfs2_delete_debugfs_file(struct gfs2_sbd *sdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) extern void gfs2_register_debugfs(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) extern void gfs2_unregister_debugfs(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) extern const struct lm_lockops gfs2_dlm_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) static inline void gfs2_holder_mark_uninitialized(struct gfs2_holder *gh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	gh->gh_gl = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) static inline bool gfs2_holder_initialized(struct gfs2_holder *gh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	return gh->gh_gl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) static inline bool gfs2_holder_queued(struct gfs2_holder *gh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	return !list_empty(&gh->gh_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)  * glock_set_object - set the gl_object field of a glock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)  * @gl: the glock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)  * @object: the object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) static inline void glock_set_object(struct gfs2_glock *gl, void *object)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	spin_lock(&gl->gl_lockref.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	if (gfs2_assert_warn(gl->gl_name.ln_sbd, gl->gl_object == NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 		gfs2_dump_glock(NULL, gl, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	gl->gl_object = object;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	spin_unlock(&gl->gl_lockref.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)  * glock_clear_object - clear the gl_object field of a glock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)  * @gl: the glock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)  * @object: the object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)  * I'd love to similarly add this:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)  *	else if (gfs2_assert_warn(gl->gl_sbd, gl->gl_object == object))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)  *		gfs2_dump_glock(NULL, gl, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)  * Unfortunately, that's not possible because as soon as gfs2_delete_inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)  * frees the block in the rgrp, another process can reassign it for an I_NEW
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)  * inode in gfs2_create_inode because that calls new_inode, not gfs2_iget.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)  * That means gfs2_delete_inode may subsequently try to call this function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)  * for a glock that's already pointing to a brand new inode. If we clear the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)  * new inode's gl_object, we'll introduce metadata corruption. Function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)  * gfs2_delete_inode calls clear_inode which calls gfs2_clear_inode which also
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)  * tries to clear gl_object, so it's more than just gfs2_delete_inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) static inline void glock_clear_object(struct gfs2_glock *gl, void *object)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	spin_lock(&gl->gl_lockref.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	if (gl->gl_object == object)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 		gl->gl_object = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	spin_unlock(&gl->gl_lockref.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) extern void gfs2_inode_remember_delete(struct gfs2_glock *gl, u64 generation);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) extern bool gfs2_inode_already_deleted(struct gfs2_glock *gl, u64 generation);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) #endif /* __GLOCK_DOT_H__ */