^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) /* -*- mode: c; c-basic-offset: 8; -*-
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * vim: noexpandtab sw=8 ts=8 sts=0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * dlmconvert.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * underlying calls for lock conversion
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Copyright (C) 2004 Oracle. All rights reserved.
^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) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/highmem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/sysctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/random.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/blkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/socket.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/inet.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/spinlock.h>
^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) #include "../cluster/heartbeat.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include "../cluster/nodemanager.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include "../cluster/tcp.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include "dlmapi.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include "dlmcommon.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include "dlmconvert.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define MLOG_MASK_PREFIX ML_DLM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include "../cluster/masklog.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /* NOTE: __dlmconvert_master is the only function in here that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * needs a spinlock held on entry (res->spinlock) and it is the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * only one that holds a lock on exit (res->spinlock).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * All other functions in here need no locks and drop all of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * the locks that they acquire. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static enum dlm_status __dlmconvert_master(struct dlm_ctxt *dlm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct dlm_lock_resource *res,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct dlm_lock *lock, int flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) int type, int *call_ast,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) int *kick_thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static enum dlm_status dlm_send_remote_convert_request(struct dlm_ctxt *dlm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct dlm_lock_resource *res,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct dlm_lock *lock, int flags, int type);
^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) * this is only called directly by dlmlock(), and only when the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * local node is the owner of the lockres
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * locking:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * caller needs: none
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * taken: takes and drops res->spinlock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * held on exit: none
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * returns: see __dlmconvert_master
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) enum dlm_status dlmconvert_master(struct dlm_ctxt *dlm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct dlm_lock_resource *res,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct dlm_lock *lock, int flags, int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) int call_ast = 0, kick_thread = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) enum dlm_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) spin_lock(&res->spinlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /* we are not in a network handler, this is fine */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) __dlm_wait_on_lockres(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) __dlm_lockres_reserve_ast(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) res->state |= DLM_LOCK_RES_IN_PROGRESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) status = __dlmconvert_master(dlm, res, lock, flags, type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) &call_ast, &kick_thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) res->state &= ~DLM_LOCK_RES_IN_PROGRESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) spin_unlock(&res->spinlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) wake_up(&res->wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (status != DLM_NORMAL && status != DLM_NOTQUEUED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) dlm_error(status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) /* either queue the ast or release it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (call_ast)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) dlm_queue_ast(dlm, lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) dlm_lockres_release_ast(dlm, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if (kick_thread)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) dlm_kick_thread(dlm, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) /* performs lock conversion at the lockres master site
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * locking:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) * caller needs: res->spinlock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * taken: takes and drops lock->spinlock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * held on exit: res->spinlock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) * returns: DLM_NORMAL, DLM_NOTQUEUED, DLM_DENIED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * call_ast: whether ast should be called for this lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) * kick_thread: whether dlm_kick_thread should be called
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static enum dlm_status __dlmconvert_master(struct dlm_ctxt *dlm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct dlm_lock_resource *res,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) struct dlm_lock *lock, int flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) int type, int *call_ast,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) int *kick_thread)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) enum dlm_status status = DLM_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) struct dlm_lock *tmplock=NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) assert_spin_locked(&res->spinlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) mlog(0, "type=%d, convert_type=%d, new convert_type=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) lock->ml.type, lock->ml.convert_type, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) spin_lock(&lock->spinlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) /* already converting? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (lock->ml.convert_type != LKM_IVMODE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) mlog(ML_ERROR, "attempted to convert a lock with a lock "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) "conversion pending\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) status = DLM_DENIED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) goto unlock_exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) /* must be on grant queue to convert */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (!dlm_lock_on_list(&res->granted, lock)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) mlog(ML_ERROR, "attempted to convert a lock not on grant "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) "queue\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) status = DLM_DENIED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) goto unlock_exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (flags & LKM_VALBLK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) switch (lock->ml.type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) case LKM_EXMODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) /* EX + LKM_VALBLK + convert == set lvb */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) mlog(0, "will set lvb: converting %s->%s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) dlm_lock_mode_name(lock->ml.type),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) dlm_lock_mode_name(type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) lock->lksb->flags |= DLM_LKSB_PUT_LVB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) case LKM_PRMODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) case LKM_NLMODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) /* refetch if new level is not NL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if (type > LKM_NLMODE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) mlog(0, "will fetch new value into "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) "lvb: converting %s->%s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) dlm_lock_mode_name(lock->ml.type),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) dlm_lock_mode_name(type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) lock->lksb->flags |= DLM_LKSB_GET_LVB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) mlog(0, "will NOT fetch new value "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) "into lvb: converting %s->%s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) dlm_lock_mode_name(lock->ml.type),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) dlm_lock_mode_name(type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) flags &= ~(LKM_VALBLK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) /* in-place downconvert? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (type <= lock->ml.type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) goto grant;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) /* upconvert from here on */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) status = DLM_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) list_for_each_entry(tmplock, &res->granted, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) if (tmplock == lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (!dlm_lock_compatible(tmplock->ml.type, type))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) goto switch_queues;
^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) list_for_each_entry(tmplock, &res->converting, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) if (!dlm_lock_compatible(tmplock->ml.type, type))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) goto switch_queues;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) /* existing conversion requests take precedence */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) if (!dlm_lock_compatible(tmplock->ml.convert_type, type))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) goto switch_queues;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) /* fall thru to grant */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) grant:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) mlog(0, "res %.*s, granting %s lock\n", res->lockname.len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) res->lockname.name, dlm_lock_mode_name(type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) /* immediately grant the new lock type */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) lock->lksb->status = DLM_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (lock->ml.node == dlm->node_num)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) mlog(0, "doing in-place convert for nonlocal lock\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) lock->ml.type = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) if (lock->lksb->flags & DLM_LKSB_PUT_LVB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) memcpy(res->lvb, lock->lksb->lvb, DLM_LVB_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) * Move the lock to the tail because it may be the only lock which has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) * an invalid lvb.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) list_move_tail(&lock->list, &res->granted);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) status = DLM_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) *call_ast = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) goto unlock_exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) switch_queues:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if (flags & LKM_NOQUEUE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) mlog(0, "failed to convert NOQUEUE lock %.*s from "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) "%d to %d...\n", res->lockname.len, res->lockname.name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) lock->ml.type, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) status = DLM_NOTQUEUED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) goto unlock_exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) mlog(0, "res %.*s, queueing...\n", res->lockname.len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) res->lockname.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) lock->ml.convert_type = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) /* do not alter lock refcount. switching lists. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) list_move_tail(&lock->list, &res->converting);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) unlock_exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) spin_unlock(&lock->spinlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) if (status == DLM_DENIED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) __dlm_print_one_lock_resource(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) if (status == DLM_NORMAL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) *kick_thread = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) return status;
^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) void dlm_revert_pending_convert(struct dlm_lock_resource *res,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) struct dlm_lock *lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) /* do not alter lock refcount. switching lists. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) list_move_tail(&lock->list, &res->granted);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) lock->ml.convert_type = LKM_IVMODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) lock->lksb->flags &= ~(DLM_LKSB_GET_LVB|DLM_LKSB_PUT_LVB);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) /* messages the master site to do lock conversion
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) * locking:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) * caller needs: none
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) * taken: takes and drops res->spinlock, uses DLM_LOCK_RES_IN_PROGRESS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) * held on exit: none
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) * returns: DLM_NORMAL, DLM_RECOVERING, status from remote node
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) enum dlm_status dlmconvert_remote(struct dlm_ctxt *dlm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) struct dlm_lock_resource *res,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) struct dlm_lock *lock, int flags, int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) enum dlm_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) mlog(0, "type=%d, convert_type=%d, busy=%d\n", lock->ml.type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) lock->ml.convert_type, res->state & DLM_LOCK_RES_IN_PROGRESS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) spin_lock(&res->spinlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) if (res->state & DLM_LOCK_RES_RECOVERING) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) mlog(0, "bailing out early since res is RECOVERING "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) "on secondary queue\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) /* __dlm_print_one_lock_resource(res); */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) status = DLM_RECOVERING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) goto bail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) /* will exit this call with spinlock held */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) __dlm_wait_on_lockres(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) if (lock->ml.convert_type != LKM_IVMODE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) __dlm_print_one_lock_resource(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) mlog(ML_ERROR, "converting a remote lock that is already "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) "converting! (cookie=%u:%llu, conv=%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) lock->ml.convert_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) status = DLM_DENIED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) goto bail;
^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) if (lock->ml.type == type && lock->ml.convert_type == LKM_IVMODE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) mlog(0, "last convert request returned DLM_RECOVERING, but "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) "owner has already queued and sent ast to me. res %.*s, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) "(cookie=%u:%llu, type=%d, conv=%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) res->lockname.len, res->lockname.name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) lock->ml.type, lock->ml.convert_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) status = DLM_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) goto bail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) res->state |= DLM_LOCK_RES_IN_PROGRESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) /* move lock to local convert queue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) /* do not alter lock refcount. switching lists. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) list_move_tail(&lock->list, &res->converting);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) lock->convert_pending = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) lock->ml.convert_type = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) if (flags & LKM_VALBLK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (lock->ml.type == LKM_EXMODE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) flags |= LKM_PUT_LVB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) lock->lksb->flags |= DLM_LKSB_PUT_LVB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (lock->ml.convert_type == LKM_NLMODE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) flags &= ~LKM_VALBLK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) flags |= LKM_GET_LVB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) lock->lksb->flags |= DLM_LKSB_GET_LVB;
^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) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) spin_unlock(&res->spinlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) /* no locks held here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) * need to wait for a reply as to whether it got queued or not. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) status = dlm_send_remote_convert_request(dlm, res, lock, flags, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) spin_lock(&res->spinlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) res->state &= ~DLM_LOCK_RES_IN_PROGRESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) /* if it failed, move it back to granted queue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) * if master returns DLM_NORMAL and then down before sending ast,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) * it may have already been moved to granted queue, reset to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) * DLM_RECOVERING and retry convert */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) if (status != DLM_NORMAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) if (status != DLM_NOTQUEUED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) dlm_error(status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) dlm_revert_pending_convert(res, lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) } else if (!lock->convert_pending) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) mlog(0, "%s: res %.*s, owner died and lock has been moved back "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) "to granted list, retry convert.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) dlm->name, res->lockname.len, res->lockname.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) status = DLM_RECOVERING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) lock->convert_pending = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) bail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) spin_unlock(&res->spinlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) /* TODO: should this be a wake_one? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) /* wake up any IN_PROGRESS waiters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) wake_up(&res->wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) /* sends DLM_CONVERT_LOCK_MSG to master site
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) * locking:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) * caller needs: none
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) * taken: none
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) * held on exit: none
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) * returns: DLM_NOLOCKMGR, status from remote node
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) static enum dlm_status dlm_send_remote_convert_request(struct dlm_ctxt *dlm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) struct dlm_lock_resource *res,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) struct dlm_lock *lock, int flags, int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) struct dlm_convert_lock convert;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) int tmpret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) enum dlm_status ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) int status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) struct kvec vec[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) size_t veclen = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) mlog(0, "%.*s\n", res->lockname.len, res->lockname.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) memset(&convert, 0, sizeof(struct dlm_convert_lock));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) convert.node_idx = dlm->node_num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) convert.requested_type = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) convert.cookie = lock->ml.cookie;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) convert.namelen = res->lockname.len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) convert.flags = cpu_to_be32(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) memcpy(convert.name, res->lockname.name, convert.namelen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) vec[0].iov_len = sizeof(struct dlm_convert_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) vec[0].iov_base = &convert;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) if (flags & LKM_PUT_LVB) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) /* extra data to send if we are updating lvb */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) vec[1].iov_len = DLM_LVB_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) vec[1].iov_base = lock->lksb->lvb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) veclen++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) tmpret = o2net_send_message_vec(DLM_CONVERT_LOCK_MSG, dlm->key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) vec, veclen, res->owner, &status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) if (tmpret >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) // successfully sent and received
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) ret = status; // this is already a dlm_status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) if (ret == DLM_RECOVERING) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) mlog(0, "node %u returned DLM_RECOVERING from convert "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) "message!\n", res->owner);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) } else if (ret == DLM_MIGRATING) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) mlog(0, "node %u returned DLM_MIGRATING from convert "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) "message!\n", res->owner);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) } else if (ret == DLM_FORWARD) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) mlog(0, "node %u returned DLM_FORWARD from convert "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) "message!\n", res->owner);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) } else if (ret != DLM_NORMAL && ret != DLM_NOTQUEUED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) dlm_error(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) mlog(ML_ERROR, "Error %d when sending message %u (key 0x%x) to "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) "node %u\n", tmpret, DLM_CONVERT_LOCK_MSG, dlm->key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) res->owner);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) if (dlm_is_host_down(tmpret)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) /* instead of logging the same network error over
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) * and over, sleep here and wait for the heartbeat
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) * to notice the node is dead. times out after 5s. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) dlm_wait_for_node_death(dlm, res->owner,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) DLM_NODE_DEATH_WAIT_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) ret = DLM_RECOVERING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) mlog(0, "node %u died so returning DLM_RECOVERING "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) "from convert message!\n", res->owner);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) ret = dlm_err_to_dlm_status(tmpret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) /* handler for DLM_CONVERT_LOCK_MSG on master site
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) * locking:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) * caller needs: none
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) * taken: takes and drop res->spinlock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) * held on exit: none
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) * returns: DLM_NORMAL, DLM_IVLOCKID, DLM_BADARGS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) * status from __dlmconvert_master
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) void **ret_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) struct dlm_ctxt *dlm = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) struct dlm_convert_lock *cnv = (struct dlm_convert_lock *)msg->buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) struct dlm_lock_resource *res = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) struct dlm_lock *lock = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) struct dlm_lock *tmp_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) struct dlm_lockstatus *lksb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) enum dlm_status status = DLM_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) u32 flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) int call_ast = 0, kick_thread = 0, ast_reserved = 0, wake = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) if (!dlm_grab(dlm)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) dlm_error(DLM_REJECTED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) return DLM_REJECTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) mlog_bug_on_msg(!dlm_domain_fully_joined(dlm),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) "Domain %s not fully joined!\n", dlm->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) if (cnv->namelen > DLM_LOCKID_NAME_MAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) status = DLM_IVBUFLEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) dlm_error(status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) goto leave;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) flags = be32_to_cpu(cnv->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) if ((flags & (LKM_PUT_LVB|LKM_GET_LVB)) ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) (LKM_PUT_LVB|LKM_GET_LVB)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) mlog(ML_ERROR, "both PUT and GET lvb specified\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) status = DLM_BADARGS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) goto leave;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) mlog(0, "lvb: %s\n", flags & LKM_PUT_LVB ? "put lvb" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) (flags & LKM_GET_LVB ? "get lvb" : "none"));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) status = DLM_IVLOCKID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) res = dlm_lookup_lockres(dlm, cnv->name, cnv->namelen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) if (!res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) dlm_error(status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) goto leave;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) spin_lock(&res->spinlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) status = __dlm_lockres_state_to_status(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) if (status != DLM_NORMAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) spin_unlock(&res->spinlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) dlm_error(status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) goto leave;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) list_for_each_entry(tmp_lock, &res->granted, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) if (tmp_lock->ml.cookie == cnv->cookie &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) tmp_lock->ml.node == cnv->node_idx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) lock = tmp_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) dlm_lock_get(lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) spin_unlock(&res->spinlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) if (!lock) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) status = DLM_IVLOCKID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) mlog(ML_ERROR, "did not find lock to convert on grant queue! "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) "cookie=%u:%llu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) dlm_get_lock_cookie_node(be64_to_cpu(cnv->cookie)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) dlm_get_lock_cookie_seq(be64_to_cpu(cnv->cookie)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) dlm_print_one_lock_resource(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) goto leave;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) /* found the lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) lksb = lock->lksb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) /* see if caller needed to get/put lvb */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) if (flags & LKM_PUT_LVB) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) BUG_ON(lksb->flags & (DLM_LKSB_PUT_LVB|DLM_LKSB_GET_LVB));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) lksb->flags |= DLM_LKSB_PUT_LVB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) memcpy(&lksb->lvb[0], &cnv->lvb[0], DLM_LVB_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) } else if (flags & LKM_GET_LVB) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) BUG_ON(lksb->flags & (DLM_LKSB_PUT_LVB|DLM_LKSB_GET_LVB));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) lksb->flags |= DLM_LKSB_GET_LVB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) spin_lock(&res->spinlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) status = __dlm_lockres_state_to_status(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) if (status == DLM_NORMAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) __dlm_lockres_reserve_ast(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) ast_reserved = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) res->state |= DLM_LOCK_RES_IN_PROGRESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) status = __dlmconvert_master(dlm, res, lock, flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) cnv->requested_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) &call_ast, &kick_thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) res->state &= ~DLM_LOCK_RES_IN_PROGRESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) wake = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) spin_unlock(&res->spinlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) if (wake)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) wake_up(&res->wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) if (status != DLM_NORMAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) if (status != DLM_NOTQUEUED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) dlm_error(status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) lksb->flags &= ~(DLM_LKSB_GET_LVB|DLM_LKSB_PUT_LVB);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) leave:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) if (lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) dlm_lock_put(lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) /* either queue the ast or release it, if reserved */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) if (call_ast)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) dlm_queue_ast(dlm, lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) else if (ast_reserved)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) dlm_lockres_release_ast(dlm, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) if (kick_thread)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) dlm_kick_thread(dlm, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) dlm_lockres_put(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) dlm_put(dlm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags