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fs/ocfs2/dlmglue.c
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/* -*- mode: c; c-basic-offset: 8; -*- * vim: noexpandtab sw=8 ts=8 sts=0: * * dlmglue.c * * Code which implements an OCFS2 specific interface to our DLM. * * Copyright (C) 2003, 2004 Oracle. All rights reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this program; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 021110-1307, USA. */ #include <linux/types.h> #include <linux/slab.h> #include <linux/highmem.h> #include <linux/mm.h> |
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#include <linux/kthread.h> #include <linux/pagemap.h> #include <linux/debugfs.h> #include <linux/seq_file.h> |
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#include <linux/time.h> |
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#include <linux/quotaops.h> |
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#define MLOG_MASK_PREFIX ML_DLM_GLUE #include <cluster/masklog.h> #include "ocfs2.h" |
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#include "ocfs2_lockingver.h" |
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#include "alloc.h" |
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#include "dcache.h" |
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#include "dlmglue.h" #include "extent_map.h" |
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#include "file.h" |
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#include "heartbeat.h" #include "inode.h" #include "journal.h" |
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#include "stackglue.h" |
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#include "slot_map.h" #include "super.h" #include "uptodate.h" |
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#include "quota.h" |
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#include "refcounttree.h" |
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#include "buffer_head_io.h" struct ocfs2_mask_waiter { struct list_head mw_item; int mw_status; struct completion mw_complete; unsigned long mw_mask; unsigned long mw_goal; |
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#ifdef CONFIG_OCFS2_FS_STATS |
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ktime_t mw_lock_start; |
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#endif |
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}; |
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static struct ocfs2_super *ocfs2_get_dentry_osb(struct ocfs2_lock_res *lockres); static struct ocfs2_super *ocfs2_get_inode_osb(struct ocfs2_lock_res *lockres); |
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static struct ocfs2_super *ocfs2_get_file_osb(struct ocfs2_lock_res *lockres); |
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static struct ocfs2_super *ocfs2_get_qinfo_osb(struct ocfs2_lock_res *lockres); |
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/* |
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* Return value from ->downconvert_worker functions. |
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* |
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* These control the precise actions of ocfs2_unblock_lock() |
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* and ocfs2_process_blocked_lock() * */ enum ocfs2_unblock_action { UNBLOCK_CONTINUE = 0, /* Continue downconvert */ UNBLOCK_CONTINUE_POST = 1, /* Continue downconvert, fire * ->post_unlock callback */ UNBLOCK_STOP_POST = 2, /* Do not downconvert, fire * ->post_unlock() callback. */ }; struct ocfs2_unblock_ctl { int requeue; enum ocfs2_unblock_action unblock_action; }; |
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/* Lockdep class keys */ struct lock_class_key lockdep_keys[OCFS2_NUM_LOCK_TYPES]; |
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static int ocfs2_check_meta_downconvert(struct ocfs2_lock_res *lockres, int new_level); static void ocfs2_set_meta_lvb(struct ocfs2_lock_res *lockres); |
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static int ocfs2_data_convert_worker(struct ocfs2_lock_res *lockres, int blocking); |
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static int ocfs2_dentry_convert_worker(struct ocfs2_lock_res *lockres, int blocking); |
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static void ocfs2_dentry_post_unlock(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres); |
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static void ocfs2_set_qinfo_lvb(struct ocfs2_lock_res *lockres); |
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static int ocfs2_check_refcount_downconvert(struct ocfs2_lock_res *lockres, int new_level); static int ocfs2_refcount_convert_worker(struct ocfs2_lock_res *lockres, int blocking); |
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#define mlog_meta_lvb(__level, __lockres) ocfs2_dump_meta_lvb_info(__level, __PRETTY_FUNCTION__, __LINE__, __lockres) /* This aids in debugging situations where a bad LVB might be involved. */ static void ocfs2_dump_meta_lvb_info(u64 level, const char *function, unsigned int line, struct ocfs2_lock_res *lockres) { |
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struct ocfs2_meta_lvb *lvb = ocfs2_dlm_lvb(&lockres->l_lksb); |
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mlog(level, "LVB information for %s (called from %s:%u): ", lockres->l_name, function, line); mlog(level, "version: %u, clusters: %u, generation: 0x%x ", lvb->lvb_version, be32_to_cpu(lvb->lvb_iclusters), be32_to_cpu(lvb->lvb_igeneration)); mlog(level, "size: %llu, uid %u, gid %u, mode 0x%x ", (unsigned long long)be64_to_cpu(lvb->lvb_isize), be32_to_cpu(lvb->lvb_iuid), be32_to_cpu(lvb->lvb_igid), be16_to_cpu(lvb->lvb_imode)); mlog(level, "nlink %u, atime_packed 0x%llx, ctime_packed 0x%llx, " "mtime_packed 0x%llx iattr 0x%x ", be16_to_cpu(lvb->lvb_inlink), (long long)be64_to_cpu(lvb->lvb_iatime_packed), (long long)be64_to_cpu(lvb->lvb_ictime_packed), (long long)be64_to_cpu(lvb->lvb_imtime_packed), be32_to_cpu(lvb->lvb_iattr)); } |
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/* * OCFS2 Lock Resource Operations * * These fine tune the behavior of the generic dlmglue locking infrastructure. |
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* * The most basic of lock types can point ->l_priv to their respective * struct ocfs2_super and allow the default actions to manage things. * * Right now, each lock type also needs to implement an init function, * and trivial lock/unlock wrappers. ocfs2_simple_drop_lockres() * should be called when the lock is no longer needed (i.e., object * destruction time). |
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*/ |
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struct ocfs2_lock_res_ops { |
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/* * Translate an ocfs2_lock_res * into an ocfs2_super *. Define * this callback if ->l_priv is not an ocfs2_super pointer */ struct ocfs2_super * (*get_osb)(struct ocfs2_lock_res *); |
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/* |
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* Optionally called in the downconvert thread after a * successful downconvert. The lockres will not be referenced * after this callback is called, so it is safe to free * memory, etc. |
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* * The exact semantics of when this is called are controlled * by ->downconvert_worker() */ |
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void (*post_unlock)(struct ocfs2_super *, struct ocfs2_lock_res *); |
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/* |
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* Allow a lock type to add checks to determine whether it is * safe to downconvert a lock. Return 0 to re-queue the * downconvert at a later time, nonzero to continue. * * For most locks, the default checks that there are no * incompatible holders are sufficient. * * Called with the lockres spinlock held. */ int (*check_downconvert)(struct ocfs2_lock_res *, int); /* |
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* Allows a lock type to populate the lock value block. This * is called on downconvert, and when we drop a lock. * * Locks that want to use this should set LOCK_TYPE_USES_LVB * in the flags field. * * Called with the lockres spinlock held. */ void (*set_lvb)(struct ocfs2_lock_res *); /* |
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* Called from the downconvert thread when it is determined * that a lock will be downconverted. This is called without * any locks held so the function can do work that might * schedule (syncing out data, etc). * * This should return any one of the ocfs2_unblock_action * values, depending on what it wants the thread to do. */ int (*downconvert_worker)(struct ocfs2_lock_res *, int); /* |
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* LOCK_TYPE_* flags which describe the specific requirements * of a lock type. Descriptions of each individual flag follow. */ int flags; |
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}; |
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/* * Some locks want to "refresh" potentially stale data when a * meaningful (PRMODE or EXMODE) lock level is first obtained. If this * flag is set, the OCFS2_LOCK_NEEDS_REFRESH flag will be set on the * individual lockres l_flags member from the ast function. It is * expected that the locking wrapper will clear the * OCFS2_LOCK_NEEDS_REFRESH flag when done. */ #define LOCK_TYPE_REQUIRES_REFRESH 0x1 |
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/* |
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* Indicate that a lock type makes use of the lock value block. The * ->set_lvb lock type callback must be defined. |
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*/ #define LOCK_TYPE_USES_LVB 0x2 |
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static struct ocfs2_lock_res_ops ocfs2_inode_rw_lops = { |
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.get_osb = ocfs2_get_inode_osb, |
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.flags = 0, |
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}; |
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static struct ocfs2_lock_res_ops ocfs2_inode_inode_lops = { |
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.get_osb = ocfs2_get_inode_osb, |
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.check_downconvert = ocfs2_check_meta_downconvert, .set_lvb = ocfs2_set_meta_lvb, |
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.downconvert_worker = ocfs2_data_convert_worker, |
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.flags = LOCK_TYPE_REQUIRES_REFRESH|LOCK_TYPE_USES_LVB, |
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}; |
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static struct ocfs2_lock_res_ops ocfs2_super_lops = { |
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.flags = LOCK_TYPE_REQUIRES_REFRESH, |
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}; static struct ocfs2_lock_res_ops ocfs2_rename_lops = { |
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.flags = 0, |
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}; |
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static struct ocfs2_lock_res_ops ocfs2_nfs_sync_lops = { .flags = 0, }; |
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static struct ocfs2_lock_res_ops ocfs2_orphan_scan_lops = { .flags = LOCK_TYPE_REQUIRES_REFRESH|LOCK_TYPE_USES_LVB, }; |
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static struct ocfs2_lock_res_ops ocfs2_dentry_lops = { |
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.get_osb = ocfs2_get_dentry_osb, |
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.post_unlock = ocfs2_dentry_post_unlock, |
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.downconvert_worker = ocfs2_dentry_convert_worker, |
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.flags = 0, |
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}; |
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static struct ocfs2_lock_res_ops ocfs2_inode_open_lops = { .get_osb = ocfs2_get_inode_osb, .flags = 0, }; |
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static struct ocfs2_lock_res_ops ocfs2_flock_lops = { .get_osb = ocfs2_get_file_osb, .flags = 0, }; |
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static struct ocfs2_lock_res_ops ocfs2_qinfo_lops = { .set_lvb = ocfs2_set_qinfo_lvb, .get_osb = ocfs2_get_qinfo_osb, .flags = LOCK_TYPE_REQUIRES_REFRESH | LOCK_TYPE_USES_LVB, }; |
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static struct ocfs2_lock_res_ops ocfs2_refcount_block_lops = { .check_downconvert = ocfs2_check_refcount_downconvert, .downconvert_worker = ocfs2_refcount_convert_worker, .flags = 0, }; |
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static inline int ocfs2_is_inode_lock(struct ocfs2_lock_res *lockres) { return lockres->l_type == OCFS2_LOCK_TYPE_META || |
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lockres->l_type == OCFS2_LOCK_TYPE_RW || lockres->l_type == OCFS2_LOCK_TYPE_OPEN; |
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} |
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static inline struct ocfs2_lock_res *ocfs2_lksb_to_lock_res(struct ocfs2_dlm_lksb *lksb) |
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{ return container_of(lksb, struct ocfs2_lock_res, l_lksb); } |
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static inline struct inode *ocfs2_lock_res_inode(struct ocfs2_lock_res *lockres) { BUG_ON(!ocfs2_is_inode_lock(lockres)); return (struct inode *) lockres->l_priv; } |
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static inline struct ocfs2_dentry_lock *ocfs2_lock_res_dl(struct ocfs2_lock_res *lockres) { BUG_ON(lockres->l_type != OCFS2_LOCK_TYPE_DENTRY); return (struct ocfs2_dentry_lock *)lockres->l_priv; } |
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static inline struct ocfs2_mem_dqinfo *ocfs2_lock_res_qinfo(struct ocfs2_lock_res *lockres) { BUG_ON(lockres->l_type != OCFS2_LOCK_TYPE_QINFO); return (struct ocfs2_mem_dqinfo *)lockres->l_priv; } |
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static inline struct ocfs2_refcount_tree * ocfs2_lock_res_refcount_tree(struct ocfs2_lock_res *res) { return container_of(res, struct ocfs2_refcount_tree, rf_lockres); } |
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static inline struct ocfs2_super *ocfs2_get_lockres_osb(struct ocfs2_lock_res *lockres) { if (lockres->l_ops->get_osb) return lockres->l_ops->get_osb(lockres); return (struct ocfs2_super *)lockres->l_priv; } |
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static int ocfs2_lock_create(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres, int level, |
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u32 dlm_flags); |
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static inline int ocfs2_may_continue_on_blocked_lock(struct ocfs2_lock_res *lockres, int wanted); |
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static void __ocfs2_cluster_unlock(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres, int level, unsigned long caller_ip); static inline void ocfs2_cluster_unlock(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres, int level) { __ocfs2_cluster_unlock(osb, lockres, level, _RET_IP_); } |
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static inline void ocfs2_generic_handle_downconvert_action(struct ocfs2_lock_res *lockres); static inline void ocfs2_generic_handle_convert_action(struct ocfs2_lock_res *lockres); static inline void ocfs2_generic_handle_attach_action(struct ocfs2_lock_res *lockres); static int ocfs2_generic_handle_bast(struct ocfs2_lock_res *lockres, int level); static void ocfs2_schedule_blocked_lock(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres); static inline void ocfs2_recover_from_dlm_error(struct ocfs2_lock_res *lockres, int convert); |
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#define ocfs2_log_dlm_error(_func, _err, _lockres) do { \ if ((_lockres)->l_type != OCFS2_LOCK_TYPE_DENTRY) \ mlog(ML_ERROR, "DLM error %d while calling %s on resource %s ", \ _err, _func, _lockres->l_name); \ else \ mlog(ML_ERROR, "DLM error %d while calling %s on resource %.*s%08x ", \ _err, _func, OCFS2_DENTRY_LOCK_INO_START - 1, (_lockres)->l_name, \ (unsigned int)ocfs2_get_dentry_lock_ino(_lockres)); \ |
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} while (0) |
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static int ocfs2_downconvert_thread(void *arg); static void ocfs2_downconvert_on_unlock(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres); |
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static int ocfs2_inode_lock_update(struct inode *inode, |
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struct buffer_head **bh); static void ocfs2_drop_osb_locks(struct ocfs2_super *osb); static inline int ocfs2_highest_compat_lock_level(int level); |
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static unsigned int ocfs2_prepare_downconvert(struct ocfs2_lock_res *lockres, int new_level); |
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static int ocfs2_downconvert_lock(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres, int new_level, |
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int lvb, unsigned int generation); |
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static int ocfs2_prepare_cancel_convert(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres); static int ocfs2_cancel_convert(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres); |
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static void ocfs2_build_lock_name(enum ocfs2_lock_type type, u64 blkno, u32 generation, char *name) { int len; |
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BUG_ON(type >= OCFS2_NUM_LOCK_TYPES); |
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len = snprintf(name, OCFS2_LOCK_ID_MAX_LEN, "%c%s%016llx%08x", ocfs2_lock_type_char(type), OCFS2_LOCK_ID_PAD, (long long)blkno, generation); |
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BUG_ON(len != (OCFS2_LOCK_ID_MAX_LEN - 1)); mlog(0, "built lock resource with name: %s ", name); |
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} |
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static DEFINE_SPINLOCK(ocfs2_dlm_tracking_lock); |
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static void ocfs2_add_lockres_tracking(struct ocfs2_lock_res *res, struct ocfs2_dlm_debug *dlm_debug) { mlog(0, "Add tracking for lockres %s ", res->l_name); spin_lock(&ocfs2_dlm_tracking_lock); list_add(&res->l_debug_list, &dlm_debug->d_lockres_tracking); spin_unlock(&ocfs2_dlm_tracking_lock); } static void ocfs2_remove_lockres_tracking(struct ocfs2_lock_res *res) { spin_lock(&ocfs2_dlm_tracking_lock); if (!list_empty(&res->l_debug_list)) list_del_init(&res->l_debug_list); spin_unlock(&ocfs2_dlm_tracking_lock); } |
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#ifdef CONFIG_OCFS2_FS_STATS static void ocfs2_init_lock_stats(struct ocfs2_lock_res *res) { |
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res->l_lock_refresh = 0; |
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memset(&res->l_lock_prmode, 0, sizeof(struct ocfs2_lock_stats)); memset(&res->l_lock_exmode, 0, sizeof(struct ocfs2_lock_stats)); |
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} static void ocfs2_update_lock_stats(struct ocfs2_lock_res *res, int level, struct ocfs2_mask_waiter *mw, int ret) { |
5bc970e80 ocfs2: Use hrtime... |
416 417 418 419 420 421 422 423 424 |
u32 usec; ktime_t kt; struct ocfs2_lock_stats *stats; if (level == LKM_PRMODE) stats = &res->l_lock_prmode; else if (level == LKM_EXMODE) stats = &res->l_lock_exmode; else |
8ddb7b004 [PATCH 2/2] ocfs2... |
425 |
return; |
5bc970e80 ocfs2: Use hrtime... |
426 427 428 429 430 431 432 433 434 435 436 437 438 |
kt = ktime_sub(ktime_get(), mw->mw_lock_start); usec = ktime_to_us(kt); stats->ls_gets++; stats->ls_total += ktime_to_ns(kt); /* overflow */ if (unlikely(stats->ls_gets) == 0) { stats->ls_gets++; stats->ls_total = ktime_to_ns(kt); } if (stats->ls_max < usec) stats->ls_max = usec; |
8ddb7b004 [PATCH 2/2] ocfs2... |
439 |
if (ret) |
5bc970e80 ocfs2: Use hrtime... |
440 |
stats->ls_fail++; |
8ddb7b004 [PATCH 2/2] ocfs2... |
441 442 443 444 445 446 447 448 449 |
} static inline void ocfs2_track_lock_refresh(struct ocfs2_lock_res *lockres) { lockres->l_lock_refresh++; } static inline void ocfs2_init_start_time(struct ocfs2_mask_waiter *mw) { |
5bc970e80 ocfs2: Use hrtime... |
450 |
mw->mw_lock_start = ktime_get(); |
8ddb7b004 [PATCH 2/2] ocfs2... |
451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 |
} #else static inline void ocfs2_init_lock_stats(struct ocfs2_lock_res *res) { } static inline void ocfs2_update_lock_stats(struct ocfs2_lock_res *res, int level, struct ocfs2_mask_waiter *mw, int ret) { } static inline void ocfs2_track_lock_refresh(struct ocfs2_lock_res *lockres) { } static inline void ocfs2_init_start_time(struct ocfs2_mask_waiter *mw) { } #endif |
ccd979bdb [PATCH] OCFS2: Th... |
467 468 469 |
static void ocfs2_lock_res_init_common(struct ocfs2_super *osb, struct ocfs2_lock_res *res, enum ocfs2_lock_type type, |
ccd979bdb [PATCH] OCFS2: Th... |
470 471 472 |
struct ocfs2_lock_res_ops *ops, void *priv) { |
ccd979bdb [PATCH] OCFS2: Th... |
473 474 475 |
res->l_type = type; res->l_ops = ops; res->l_priv = priv; |
bd3e76105 ocfs2: Use global... |
476 477 478 |
res->l_level = DLM_LOCK_IV; res->l_requested = DLM_LOCK_IV; res->l_blocking = DLM_LOCK_IV; |
ccd979bdb [PATCH] OCFS2: Th... |
479 480 481 482 483 484 |
res->l_action = OCFS2_AST_INVALID; res->l_unlock_action = OCFS2_UNLOCK_INVALID; res->l_flags = OCFS2_LOCK_INITIALIZED; ocfs2_add_lockres_tracking(res, osb->osb_dlm_debug); |
8ddb7b004 [PATCH 2/2] ocfs2... |
485 486 |
ocfs2_init_lock_stats(res); |
cb25797d4 ocfs2: Add lockde... |
487 488 489 490 491 492 493 |
#ifdef CONFIG_DEBUG_LOCK_ALLOC if (type != OCFS2_LOCK_TYPE_OPEN) lockdep_init_map(&res->l_lockdep_map, ocfs2_lock_type_strings[type], &lockdep_keys[type], 0); else res->l_lockdep_map.key = NULL; #endif |
ccd979bdb [PATCH] OCFS2: Th... |
494 495 496 497 498 499 500 501 502 503 504 505 506 507 |
} void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res) { /* This also clears out the lock status block */ memset(res, 0, sizeof(struct ocfs2_lock_res)); spin_lock_init(&res->l_lock); init_waitqueue_head(&res->l_event); INIT_LIST_HEAD(&res->l_blocked_list); INIT_LIST_HEAD(&res->l_mask_waiters); } void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res, enum ocfs2_lock_type type, |
24c19ef40 ocfs2: Remove i_g... |
508 |
unsigned int generation, |
ccd979bdb [PATCH] OCFS2: Th... |
509 510 511 512 513 514 515 516 517 |
struct inode *inode) { struct ocfs2_lock_res_ops *ops; switch(type) { case OCFS2_LOCK_TYPE_RW: ops = &ocfs2_inode_rw_lops; break; case OCFS2_LOCK_TYPE_META: |
e63aecb65 ocfs2: Rename ocf... |
518 |
ops = &ocfs2_inode_inode_lops; |
ccd979bdb [PATCH] OCFS2: Th... |
519 |
break; |
500086300 ocfs2: Remove del... |
520 521 522 |
case OCFS2_LOCK_TYPE_OPEN: ops = &ocfs2_inode_open_lops; break; |
ccd979bdb [PATCH] OCFS2: Th... |
523 524 525 526 527 528 |
default: mlog_bug_on_msg(1, "type: %d ", type); ops = NULL; /* thanks, gcc */ break; }; |
d680efe9d ocfs2: Add new cl... |
529 |
ocfs2_build_lock_name(type, OCFS2_I(inode)->ip_blkno, |
24c19ef40 ocfs2: Remove i_g... |
530 |
generation, res->l_name); |
d680efe9d ocfs2: Add new cl... |
531 532 |
ocfs2_lock_res_init_common(OCFS2_SB(inode->i_sb), res, type, ops, inode); } |
54a7e7552 ocfs2: Add ->get_... |
533 534 535 536 537 538 |
static struct ocfs2_super *ocfs2_get_inode_osb(struct ocfs2_lock_res *lockres) { struct inode *inode = ocfs2_lock_res_inode(lockres); return OCFS2_SB(inode->i_sb); } |
9e33d69f5 ocfs2: Implementa... |
539 540 541 542 543 544 |
static struct ocfs2_super *ocfs2_get_qinfo_osb(struct ocfs2_lock_res *lockres) { struct ocfs2_mem_dqinfo *info = lockres->l_priv; return OCFS2_SB(info->dqi_gi.dqi_sb); } |
cf8e06f1a [PATCH 1/2] ocfs2... |
545 546 547 548 549 550 |
static struct ocfs2_super *ocfs2_get_file_osb(struct ocfs2_lock_res *lockres) { struct ocfs2_file_private *fp = lockres->l_priv; return OCFS2_SB(fp->fp_file->f_mapping->host->i_sb); } |
d680efe9d ocfs2: Add new cl... |
551 552 553 554 555 556 557 558 559 |
static __u64 ocfs2_get_dentry_lock_ino(struct ocfs2_lock_res *lockres) { __be64 inode_blkno_be; memcpy(&inode_blkno_be, &lockres->l_name[OCFS2_DENTRY_LOCK_INO_START], sizeof(__be64)); return be64_to_cpu(inode_blkno_be); } |
54a7e7552 ocfs2: Add ->get_... |
560 561 562 563 564 565 |
static struct ocfs2_super *ocfs2_get_dentry_osb(struct ocfs2_lock_res *lockres) { struct ocfs2_dentry_lock *dl = lockres->l_priv; return OCFS2_SB(dl->dl_inode->i_sb); } |
d680efe9d ocfs2: Add new cl... |
566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 |
void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl, u64 parent, struct inode *inode) { int len; u64 inode_blkno = OCFS2_I(inode)->ip_blkno; __be64 inode_blkno_be = cpu_to_be64(inode_blkno); struct ocfs2_lock_res *lockres = &dl->dl_lockres; ocfs2_lock_res_init_once(lockres); /* * Unfortunately, the standard lock naming scheme won't work * here because we have two 16 byte values to use. Instead, * we'll stuff the inode number as a binary value. We still * want error prints to show something without garbling the * display, so drop a null byte in there before the inode * number. A future version of OCFS2 will likely use all * binary lock names. The stringified names have been a * tremendous aid in debugging, but now that the debugfs * interface exists, we can mangle things there if need be. * * NOTE: We also drop the standard "pad" value (the total lock * name size stays the same though - the last part is all * zeros due to the memset in ocfs2_lock_res_init_once() */ len = snprintf(lockres->l_name, OCFS2_DENTRY_LOCK_INO_START, "%c%016llx", ocfs2_lock_type_char(OCFS2_LOCK_TYPE_DENTRY), (long long)parent); BUG_ON(len != (OCFS2_DENTRY_LOCK_INO_START - 1)); memcpy(&lockres->l_name[OCFS2_DENTRY_LOCK_INO_START], &inode_blkno_be, sizeof(__be64)); ocfs2_lock_res_init_common(OCFS2_SB(inode->i_sb), lockres, OCFS2_LOCK_TYPE_DENTRY, &ocfs2_dentry_lops, dl); |
ccd979bdb [PATCH] OCFS2: Th... |
604 605 606 607 608 609 610 611 |
} static void ocfs2_super_lock_res_init(struct ocfs2_lock_res *res, struct ocfs2_super *osb) { /* Superblock lockres doesn't come from a slab so we call init * once on it manually. */ ocfs2_lock_res_init_once(res); |
d680efe9d ocfs2: Add new cl... |
612 613 |
ocfs2_build_lock_name(OCFS2_LOCK_TYPE_SUPER, OCFS2_SUPER_BLOCK_BLKNO, 0, res->l_name); |
ccd979bdb [PATCH] OCFS2: Th... |
614 |
ocfs2_lock_res_init_common(osb, res, OCFS2_LOCK_TYPE_SUPER, |
ccd979bdb [PATCH] OCFS2: Th... |
615 616 617 618 619 620 621 622 623 |
&ocfs2_super_lops, osb); } static void ocfs2_rename_lock_res_init(struct ocfs2_lock_res *res, struct ocfs2_super *osb) { /* Rename lockres doesn't come from a slab so we call init * once on it manually. */ ocfs2_lock_res_init_once(res); |
d680efe9d ocfs2: Add new cl... |
624 625 |
ocfs2_build_lock_name(OCFS2_LOCK_TYPE_RENAME, 0, 0, res->l_name); ocfs2_lock_res_init_common(osb, res, OCFS2_LOCK_TYPE_RENAME, |
ccd979bdb [PATCH] OCFS2: Th... |
626 627 |
&ocfs2_rename_lops, osb); } |
6ca497a83 ocfs2: fix rare s... |
628 629 630 631 632 633 634 635 636 637 |
static void ocfs2_nfs_sync_lock_res_init(struct ocfs2_lock_res *res, struct ocfs2_super *osb) { /* nfs_sync lockres doesn't come from a slab so we call init * once on it manually. */ ocfs2_lock_res_init_once(res); ocfs2_build_lock_name(OCFS2_LOCK_TYPE_NFS_SYNC, 0, 0, res->l_name); ocfs2_lock_res_init_common(osb, res, OCFS2_LOCK_TYPE_NFS_SYNC, &ocfs2_nfs_sync_lops, osb); } |
83273932f ocfs2: timer to q... |
638 639 640 |
static void ocfs2_orphan_scan_lock_res_init(struct ocfs2_lock_res *res, struct ocfs2_super *osb) { |
83273932f ocfs2: timer to q... |
641 642 643 644 |
ocfs2_lock_res_init_once(res); ocfs2_build_lock_name(OCFS2_LOCK_TYPE_ORPHAN_SCAN, 0, 0, res->l_name); ocfs2_lock_res_init_common(osb, res, OCFS2_LOCK_TYPE_ORPHAN_SCAN, &ocfs2_orphan_scan_lops, osb); |
83273932f ocfs2: timer to q... |
645 |
} |
cf8e06f1a [PATCH 1/2] ocfs2... |
646 647 648 649 650 651 652 653 654 655 656 657 658 659 |
void ocfs2_file_lock_res_init(struct ocfs2_lock_res *lockres, struct ocfs2_file_private *fp) { struct inode *inode = fp->fp_file->f_mapping->host; struct ocfs2_inode_info *oi = OCFS2_I(inode); ocfs2_lock_res_init_once(lockres); ocfs2_build_lock_name(OCFS2_LOCK_TYPE_FLOCK, oi->ip_blkno, inode->i_generation, lockres->l_name); ocfs2_lock_res_init_common(OCFS2_SB(inode->i_sb), lockres, OCFS2_LOCK_TYPE_FLOCK, &ocfs2_flock_lops, fp); lockres->l_flags |= OCFS2_LOCK_NOCACHE; } |
9e33d69f5 ocfs2: Implementa... |
660 661 662 663 664 665 666 667 668 669 |
void ocfs2_qinfo_lock_res_init(struct ocfs2_lock_res *lockres, struct ocfs2_mem_dqinfo *info) { ocfs2_lock_res_init_once(lockres); ocfs2_build_lock_name(OCFS2_LOCK_TYPE_QINFO, info->dqi_gi.dqi_type, 0, lockres->l_name); ocfs2_lock_res_init_common(OCFS2_SB(info->dqi_gi.dqi_sb), lockres, OCFS2_LOCK_TYPE_QINFO, &ocfs2_qinfo_lops, info); } |
8dec98edf ocfs2: Add new re... |
670 671 672 673 674 675 676 677 678 679 |
void ocfs2_refcount_lock_res_init(struct ocfs2_lock_res *lockres, struct ocfs2_super *osb, u64 ref_blkno, unsigned int generation) { ocfs2_lock_res_init_once(lockres); ocfs2_build_lock_name(OCFS2_LOCK_TYPE_REFCOUNT, ref_blkno, generation, lockres->l_name); ocfs2_lock_res_init_common(osb, lockres, OCFS2_LOCK_TYPE_REFCOUNT, &ocfs2_refcount_block_lops, osb); } |
ccd979bdb [PATCH] OCFS2: Th... |
680 681 |
void ocfs2_lock_res_free(struct ocfs2_lock_res *res) { |
ccd979bdb [PATCH] OCFS2: Th... |
682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 |
if (!(res->l_flags & OCFS2_LOCK_INITIALIZED)) return; ocfs2_remove_lockres_tracking(res); mlog_bug_on_msg(!list_empty(&res->l_blocked_list), "Lockres %s is on the blocked list ", res->l_name); mlog_bug_on_msg(!list_empty(&res->l_mask_waiters), "Lockres %s has mask waiters pending ", res->l_name); mlog_bug_on_msg(spin_is_locked(&res->l_lock), "Lockres %s is locked ", res->l_name); mlog_bug_on_msg(res->l_ro_holders, "Lockres %s has %u ro holders ", res->l_name, res->l_ro_holders); mlog_bug_on_msg(res->l_ex_holders, "Lockres %s has %u ex holders ", res->l_name, res->l_ex_holders); /* Need to clear out the lock status block for the dlm */ memset(&res->l_lksb, 0, sizeof(res->l_lksb)); res->l_flags = 0UL; |
ccd979bdb [PATCH] OCFS2: Th... |
712 713 714 715 716 |
} static inline void ocfs2_inc_holders(struct ocfs2_lock_res *lockres, int level) { |
ccd979bdb [PATCH] OCFS2: Th... |
717 718 719 |
BUG_ON(!lockres); switch(level) { |
bd3e76105 ocfs2: Use global... |
720 |
case DLM_LOCK_EX: |
ccd979bdb [PATCH] OCFS2: Th... |
721 722 |
lockres->l_ex_holders++; break; |
bd3e76105 ocfs2: Use global... |
723 |
case DLM_LOCK_PR: |
ccd979bdb [PATCH] OCFS2: Th... |
724 725 726 727 728 |
lockres->l_ro_holders++; break; default: BUG(); } |
ccd979bdb [PATCH] OCFS2: Th... |
729 730 731 732 733 |
} static inline void ocfs2_dec_holders(struct ocfs2_lock_res *lockres, int level) { |
ccd979bdb [PATCH] OCFS2: Th... |
734 735 736 |
BUG_ON(!lockres); switch(level) { |
bd3e76105 ocfs2: Use global... |
737 |
case DLM_LOCK_EX: |
ccd979bdb [PATCH] OCFS2: Th... |
738 739 740 |
BUG_ON(!lockres->l_ex_holders); lockres->l_ex_holders--; break; |
bd3e76105 ocfs2: Use global... |
741 |
case DLM_LOCK_PR: |
ccd979bdb [PATCH] OCFS2: Th... |
742 743 744 745 746 747 |
BUG_ON(!lockres->l_ro_holders); lockres->l_ro_holders--; break; default: BUG(); } |
ccd979bdb [PATCH] OCFS2: Th... |
748 749 750 751 752 753 754 |
} /* WARNING: This function lives in a world where the only three lock * levels are EX, PR, and NL. It *will* have to be adjusted when more * lock types are added. */ static inline int ocfs2_highest_compat_lock_level(int level) { |
bd3e76105 ocfs2: Use global... |
755 |
int new_level = DLM_LOCK_EX; |
ccd979bdb [PATCH] OCFS2: Th... |
756 |
|
bd3e76105 ocfs2: Use global... |
757 758 759 760 |
if (level == DLM_LOCK_EX) new_level = DLM_LOCK_NL; else if (level == DLM_LOCK_PR) new_level = DLM_LOCK_PR; |
ccd979bdb [PATCH] OCFS2: Th... |
761 762 763 764 765 766 |
return new_level; } static void lockres_set_flags(struct ocfs2_lock_res *lockres, unsigned long newflags) { |
800deef3f [PATCH] ocfs2: us... |
767 |
struct ocfs2_mask_waiter *mw, *tmp; |
ccd979bdb [PATCH] OCFS2: Th... |
768 769 770 771 |
assert_spin_locked(&lockres->l_lock); lockres->l_flags = newflags; |
800deef3f [PATCH] ocfs2: us... |
772 |
list_for_each_entry_safe(mw, tmp, &lockres->l_mask_waiters, mw_item) { |
ccd979bdb [PATCH] OCFS2: Th... |
773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 |
if ((lockres->l_flags & mw->mw_mask) != mw->mw_goal) continue; list_del_init(&mw->mw_item); mw->mw_status = 0; complete(&mw->mw_complete); } } static void lockres_or_flags(struct ocfs2_lock_res *lockres, unsigned long or) { lockres_set_flags(lockres, lockres->l_flags | or); } static void lockres_clear_flags(struct ocfs2_lock_res *lockres, unsigned long clear) { lockres_set_flags(lockres, lockres->l_flags & ~clear); } static inline void ocfs2_generic_handle_downconvert_action(struct ocfs2_lock_res *lockres) { |
ccd979bdb [PATCH] OCFS2: Th... |
793 794 795 |
BUG_ON(!(lockres->l_flags & OCFS2_LOCK_BUSY)); BUG_ON(!(lockres->l_flags & OCFS2_LOCK_ATTACHED)); BUG_ON(!(lockres->l_flags & OCFS2_LOCK_BLOCKED)); |
bd3e76105 ocfs2: Use global... |
796 |
BUG_ON(lockres->l_blocking <= DLM_LOCK_NL); |
ccd979bdb [PATCH] OCFS2: Th... |
797 798 799 800 |
lockres->l_level = lockres->l_requested; if (lockres->l_level <= ocfs2_highest_compat_lock_level(lockres->l_blocking)) { |
bd3e76105 ocfs2: Use global... |
801 |
lockres->l_blocking = DLM_LOCK_NL; |
ccd979bdb [PATCH] OCFS2: Th... |
802 803 804 |
lockres_clear_flags(lockres, OCFS2_LOCK_BLOCKED); } lockres_clear_flags(lockres, OCFS2_LOCK_BUSY); |
ccd979bdb [PATCH] OCFS2: Th... |
805 806 807 808 |
} static inline void ocfs2_generic_handle_convert_action(struct ocfs2_lock_res *lockres) { |
ccd979bdb [PATCH] OCFS2: Th... |
809 810 811 812 813 814 815 |
BUG_ON(!(lockres->l_flags & OCFS2_LOCK_BUSY)); BUG_ON(!(lockres->l_flags & OCFS2_LOCK_ATTACHED)); /* Convert from RO to EX doesn't really need anything as our * information is already up to data. Convert from NL to * *anything* however should mark ourselves as needing an * update */ |
bd3e76105 ocfs2: Use global... |
816 |
if (lockres->l_level == DLM_LOCK_NL && |
f625c9793 ocfs2: Clean up l... |
817 |
lockres->l_ops->flags & LOCK_TYPE_REQUIRES_REFRESH) |
ccd979bdb [PATCH] OCFS2: Th... |
818 819 820 |
lockres_or_flags(lockres, OCFS2_LOCK_NEEDS_REFRESH); lockres->l_level = lockres->l_requested; |
a19128260 ocfs2: Prevent a ... |
821 822 823 824 825 826 827 |
/* * We set the OCFS2_LOCK_UPCONVERT_FINISHING flag before clearing * the OCFS2_LOCK_BUSY flag to prevent the dc thread from * downconverting the lock before the upconvert has fully completed. */ lockres_or_flags(lockres, OCFS2_LOCK_UPCONVERT_FINISHING); |
ccd979bdb [PATCH] OCFS2: Th... |
828 |
lockres_clear_flags(lockres, OCFS2_LOCK_BUSY); |
ccd979bdb [PATCH] OCFS2: Th... |
829 830 831 832 |
} static inline void ocfs2_generic_handle_attach_action(struct ocfs2_lock_res *lockres) { |
3cf0c507d [PATCH] Fix prior... |
833 |
BUG_ON((!(lockres->l_flags & OCFS2_LOCK_BUSY))); |
ccd979bdb [PATCH] OCFS2: Th... |
834 |
BUG_ON(lockres->l_flags & OCFS2_LOCK_ATTACHED); |
bd3e76105 ocfs2: Use global... |
835 |
if (lockres->l_requested > DLM_LOCK_NL && |
f625c9793 ocfs2: Clean up l... |
836 837 |
!(lockres->l_flags & OCFS2_LOCK_LOCAL) && lockres->l_ops->flags & LOCK_TYPE_REQUIRES_REFRESH) |
ccd979bdb [PATCH] OCFS2: Th... |
838 839 840 841 842 |
lockres_or_flags(lockres, OCFS2_LOCK_NEEDS_REFRESH); lockres->l_level = lockres->l_requested; lockres_or_flags(lockres, OCFS2_LOCK_ATTACHED); lockres_clear_flags(lockres, OCFS2_LOCK_BUSY); |
ccd979bdb [PATCH] OCFS2: Th... |
843 |
} |
ccd979bdb [PATCH] OCFS2: Th... |
844 845 846 847 |
static int ocfs2_generic_handle_bast(struct ocfs2_lock_res *lockres, int level) { int needs_downconvert = 0; |
ccd979bdb [PATCH] OCFS2: Th... |
848 849 |
assert_spin_locked(&lockres->l_lock); |
ccd979bdb [PATCH] OCFS2: Th... |
850 851 852 853 854 855 856 857 858 859 860 |
if (level > lockres->l_blocking) { /* only schedule a downconvert if we haven't already scheduled * one that goes low enough to satisfy the level we're * blocking. this also catches the case where we get * duplicate BASTs */ if (ocfs2_highest_compat_lock_level(level) < ocfs2_highest_compat_lock_level(lockres->l_blocking)) needs_downconvert = 1; lockres->l_blocking = level; } |
9b915181a ocfs2: Use a sepa... |
861 862 863 864 |
mlog(ML_BASTS, "lockres %s, block %d, level %d, l_block %d, dwn %d ", lockres->l_name, level, lockres->l_level, lockres->l_blocking, needs_downconvert); |
0b94a909e ocfs2: Fix settin... |
865 866 |
if (needs_downconvert) lockres_or_flags(lockres, OCFS2_LOCK_BLOCKED); |
c1e8d35ef ocfs2: Remove EXI... |
867 868 |
mlog(0, "needs_downconvert = %d ", needs_downconvert); |
ccd979bdb [PATCH] OCFS2: Th... |
869 870 |
return needs_downconvert; } |
de551246e ocfs2: Remove CAN... |
871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 |
/* * OCFS2_LOCK_PENDING and l_pending_gen. * * Why does OCFS2_LOCK_PENDING exist? To close a race between setting * OCFS2_LOCK_BUSY and calling ocfs2_dlm_lock(). See ocfs2_unblock_lock() * for more details on the race. * * OCFS2_LOCK_PENDING closes the race quite nicely. However, it introduces * a race on itself. In o2dlm, we can get the ast before ocfs2_dlm_lock() * returns. The ast clears OCFS2_LOCK_BUSY, and must therefore clear * OCFS2_LOCK_PENDING at the same time. When ocfs2_dlm_lock() returns, * the caller is going to try to clear PENDING again. If nothing else is * happening, __lockres_clear_pending() sees PENDING is unset and does * nothing. * * But what if another path (eg downconvert thread) has just started a * new locking action? The other path has re-set PENDING. Our path * cannot clear PENDING, because that will re-open the original race * window. * * [Example] * * ocfs2_meta_lock() * ocfs2_cluster_lock() * set BUSY * set PENDING * drop l_lock * ocfs2_dlm_lock() * ocfs2_locking_ast() ocfs2_downconvert_thread() * clear PENDING ocfs2_unblock_lock() * take_l_lock * !BUSY * ocfs2_prepare_downconvert() * set BUSY * set PENDING * drop l_lock * take l_lock * clear PENDING * drop l_lock * <window> * ocfs2_dlm_lock() * * So as you can see, we now have a window where l_lock is not held, * PENDING is not set, and ocfs2_dlm_lock() has not been called. * * The core problem is that ocfs2_cluster_lock() has cleared the PENDING * set by ocfs2_prepare_downconvert(). That wasn't nice. * * To solve this we introduce l_pending_gen. A call to * lockres_clear_pending() will only do so when it is passed a generation * number that matches the lockres. lockres_set_pending() will return the * current generation number. When ocfs2_cluster_lock() goes to clear * PENDING, it passes the generation it got from set_pending(). In our * example above, the generation numbers will *not* match. Thus, * ocfs2_cluster_lock() will not clear the PENDING set by * ocfs2_prepare_downconvert(). */ /* Unlocked version for ocfs2_locking_ast() */ static void __lockres_clear_pending(struct ocfs2_lock_res *lockres, unsigned int generation, struct ocfs2_super *osb) { assert_spin_locked(&lockres->l_lock); /* * The ast and locking functions can race us here. The winner * will clear pending, the loser will not. */ if (!(lockres->l_flags & OCFS2_LOCK_PENDING) || (lockres->l_pending_gen != generation)) return; lockres_clear_flags(lockres, OCFS2_LOCK_PENDING); lockres->l_pending_gen++; /* * The downconvert thread may have skipped us because we * were PENDING. Wake it up. */ if (lockres->l_flags & OCFS2_LOCK_BLOCKED) ocfs2_wake_downconvert_thread(osb); } /* Locked version for callers of ocfs2_dlm_lock() */ static void lockres_clear_pending(struct ocfs2_lock_res *lockres, unsigned int generation, struct ocfs2_super *osb) { unsigned long flags; spin_lock_irqsave(&lockres->l_lock, flags); __lockres_clear_pending(lockres, generation, osb); spin_unlock_irqrestore(&lockres->l_lock, flags); } static unsigned int lockres_set_pending(struct ocfs2_lock_res *lockres) { assert_spin_locked(&lockres->l_lock); BUG_ON(!(lockres->l_flags & OCFS2_LOCK_BUSY)); lockres_or_flags(lockres, OCFS2_LOCK_PENDING); return lockres->l_pending_gen; } |
c0e413385 ocfs2: Attach the... |
976 |
static void ocfs2_blocking_ast(struct ocfs2_dlm_lksb *lksb, int level) |
ccd979bdb [PATCH] OCFS2: Th... |
977 |
{ |
a796d2862 ocfs2: Pass lksbs... |
978 |
struct ocfs2_lock_res *lockres = ocfs2_lksb_to_lock_res(lksb); |
aa2623ad8 ocfs2: combine in... |
979 |
struct ocfs2_super *osb = ocfs2_get_lockres_osb(lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
980 981 |
int needs_downconvert; unsigned long flags; |
bd3e76105 ocfs2: Use global... |
982 |
BUG_ON(level <= DLM_LOCK_NL); |
ccd979bdb [PATCH] OCFS2: Th... |
983 |
|
9b915181a ocfs2: Use a sepa... |
984 985 986 |
mlog(ML_BASTS, "BAST fired for lockres %s, blocking %d, level %d, " "type %s ", lockres->l_name, level, lockres->l_level, |
aa2623ad8 ocfs2: combine in... |
987 |
ocfs2_lock_type_string(lockres->l_type)); |
cf8e06f1a [PATCH 1/2] ocfs2... |
988 989 990 991 992 993 |
/* * We can skip the bast for locks which don't enable caching - * they'll be dropped at the earliest possible time anyway. */ if (lockres->l_flags & OCFS2_LOCK_NOCACHE) return; |
ccd979bdb [PATCH] OCFS2: Th... |
994 995 996 997 998 |
spin_lock_irqsave(&lockres->l_lock, flags); needs_downconvert = ocfs2_generic_handle_bast(lockres, level); if (needs_downconvert) ocfs2_schedule_blocked_lock(osb, lockres); spin_unlock_irqrestore(&lockres->l_lock, flags); |
d680efe9d ocfs2: Add new cl... |
999 |
wake_up(&lockres->l_event); |
34d024f84 ocfs2: Remove mou... |
1000 |
ocfs2_wake_downconvert_thread(osb); |
ccd979bdb [PATCH] OCFS2: Th... |
1001 |
} |
c0e413385 ocfs2: Attach the... |
1002 |
static void ocfs2_locking_ast(struct ocfs2_dlm_lksb *lksb) |
ccd979bdb [PATCH] OCFS2: Th... |
1003 |
{ |
a796d2862 ocfs2: Pass lksbs... |
1004 |
struct ocfs2_lock_res *lockres = ocfs2_lksb_to_lock_res(lksb); |
de551246e ocfs2: Remove CAN... |
1005 |
struct ocfs2_super *osb = ocfs2_get_lockres_osb(lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
1006 |
unsigned long flags; |
1693a5c01 ocfs2: handle asy... |
1007 |
int status; |
ccd979bdb [PATCH] OCFS2: Th... |
1008 1009 |
spin_lock_irqsave(&lockres->l_lock, flags); |
1693a5c01 ocfs2: handle asy... |
1010 1011 1012 1013 1014 1015 1016 1017 |
status = ocfs2_dlm_lock_status(&lockres->l_lksb); if (status == -EAGAIN) { lockres_clear_flags(lockres, OCFS2_LOCK_BUSY); goto out; } if (status) { |
8f2c9c1b1 ocfs2: Create the... |
1018 1019 |
mlog(ML_ERROR, "lockres %s: lksb status value of %d! ", |
1693a5c01 ocfs2: handle asy... |
1020 |
lockres->l_name, status); |
ccd979bdb [PATCH] OCFS2: Th... |
1021 1022 1023 |
spin_unlock_irqrestore(&lockres->l_lock, flags); return; } |
9b915181a ocfs2: Use a sepa... |
1024 1025 1026 1027 |
mlog(ML_BASTS, "AST fired for lockres %s, action %d, unlock %d, " "level %d => %d ", lockres->l_name, lockres->l_action, lockres->l_unlock_action, lockres->l_level, lockres->l_requested); |
ccd979bdb [PATCH] OCFS2: Th... |
1028 1029 1030 |
switch(lockres->l_action) { case OCFS2_AST_ATTACH: ocfs2_generic_handle_attach_action(lockres); |
e92d57df2 ocfs2: combine in... |
1031 |
lockres_clear_flags(lockres, OCFS2_LOCK_LOCAL); |
ccd979bdb [PATCH] OCFS2: Th... |
1032 1033 1034 1035 1036 1037 1038 1039 |
break; case OCFS2_AST_CONVERT: ocfs2_generic_handle_convert_action(lockres); break; case OCFS2_AST_DOWNCONVERT: ocfs2_generic_handle_downconvert_action(lockres); break; default: |
9b915181a ocfs2: Use a sepa... |
1040 1041 1042 |
mlog(ML_ERROR, "lockres %s: AST fired with invalid action: %u, " "flags 0x%lx, unlock: %u ", |
e92d57df2 ocfs2: combine in... |
1043 1044 |
lockres->l_name, lockres->l_action, lockres->l_flags, lockres->l_unlock_action); |
ccd979bdb [PATCH] OCFS2: Th... |
1045 1046 |
BUG(); } |
1693a5c01 ocfs2: handle asy... |
1047 |
out: |
ccd979bdb [PATCH] OCFS2: Th... |
1048 1049 1050 |
/* set it to something invalid so if we get called again we * can catch it. */ lockres->l_action = OCFS2_AST_INVALID; |
ccd979bdb [PATCH] OCFS2: Th... |
1051 |
|
de551246e ocfs2: Remove CAN... |
1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 |
/* Did we try to cancel this lock? Clear that state */ if (lockres->l_unlock_action == OCFS2_UNLOCK_CANCEL_CONVERT) lockres->l_unlock_action = OCFS2_UNLOCK_INVALID; /* * We may have beaten the locking functions here. We certainly * know that dlm_lock() has been called :-) * Because we can't have two lock calls in flight at once, we * can use lockres->l_pending_gen. */ __lockres_clear_pending(lockres, lockres->l_pending_gen, osb); |
ccd979bdb [PATCH] OCFS2: Th... |
1063 |
wake_up(&lockres->l_event); |
d680efe9d ocfs2: Add new cl... |
1064 |
spin_unlock_irqrestore(&lockres->l_lock, flags); |
ccd979bdb [PATCH] OCFS2: Th... |
1065 |
} |
553b5eb91 ocfs2: Pass the l... |
1066 1067 1068 1069 |
static void ocfs2_unlock_ast(struct ocfs2_dlm_lksb *lksb, int error) { struct ocfs2_lock_res *lockres = ocfs2_lksb_to_lock_res(lksb); unsigned long flags; |
9b915181a ocfs2: Use a sepa... |
1070 1071 1072 |
mlog(ML_BASTS, "UNLOCK AST fired for lockres %s, action = %d ", lockres->l_name, lockres->l_unlock_action); |
553b5eb91 ocfs2: Pass the l... |
1073 1074 1075 1076 1077 1078 1079 1080 |
spin_lock_irqsave(&lockres->l_lock, flags); if (error) { mlog(ML_ERROR, "Dlm passes error %d for lock %s, " "unlock_action %d ", error, lockres->l_name, lockres->l_unlock_action); spin_unlock_irqrestore(&lockres->l_lock, flags); |
553b5eb91 ocfs2: Pass the l... |
1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 |
return; } switch(lockres->l_unlock_action) { case OCFS2_UNLOCK_CANCEL_CONVERT: mlog(0, "Cancel convert success for %s ", lockres->l_name); lockres->l_action = OCFS2_AST_INVALID; /* Downconvert thread may have requeued this lock, we * need to wake it. */ if (lockres->l_flags & OCFS2_LOCK_BLOCKED) ocfs2_wake_downconvert_thread(ocfs2_get_lockres_osb(lockres)); break; case OCFS2_UNLOCK_DROP_LOCK: lockres->l_level = DLM_LOCK_IV; break; default: BUG(); } lockres_clear_flags(lockres, OCFS2_LOCK_BUSY); lockres->l_unlock_action = OCFS2_UNLOCK_INVALID; wake_up(&lockres->l_event); spin_unlock_irqrestore(&lockres->l_lock, flags); |
553b5eb91 ocfs2: Pass the l... |
1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 |
} /* * This is the filesystem locking protocol. It provides the lock handling * hooks for the underlying DLM. It has a maximum version number. * The version number allows interoperability with systems running at * the same major number and an equal or smaller minor number. * * Whenever the filesystem does new things with locks (adds or removes a * lock, orders them differently, does different things underneath a lock), * the version must be changed. The protocol is negotiated when joining * the dlm domain. A node may join the domain if its major version is * identical to all other nodes and its minor version is greater than * or equal to all other nodes. When its minor version is greater than * the other nodes, it will run at the minor version specified by the * other nodes. * * If a locking change is made that will not be compatible with older * versions, the major number must be increased and the minor version set * to zero. If a change merely adds a behavior that can be disabled when * speaking to older versions, the minor version must be increased. If a * change adds a fully backwards compatible change (eg, LVB changes that * are just ignored by older versions), the version does not need to be * updated. */ static struct ocfs2_locking_protocol lproto = { .lp_max_version = { .pv_major = OCFS2_LOCKING_PROTOCOL_MAJOR, .pv_minor = OCFS2_LOCKING_PROTOCOL_MINOR, }, .lp_lock_ast = ocfs2_locking_ast, .lp_blocking_ast = ocfs2_blocking_ast, .lp_unlock_ast = ocfs2_unlock_ast, }; void ocfs2_set_locking_protocol(void) { ocfs2_stack_glue_set_max_proto_version(&lproto.lp_max_version); } |
ccd979bdb [PATCH] OCFS2: Th... |
1144 1145 1146 1147 |
static inline void ocfs2_recover_from_dlm_error(struct ocfs2_lock_res *lockres, int convert) { unsigned long flags; |
ccd979bdb [PATCH] OCFS2: Th... |
1148 1149 |
spin_lock_irqsave(&lockres->l_lock, flags); lockres_clear_flags(lockres, OCFS2_LOCK_BUSY); |
a19128260 ocfs2: Prevent a ... |
1150 |
lockres_clear_flags(lockres, OCFS2_LOCK_UPCONVERT_FINISHING); |
ccd979bdb [PATCH] OCFS2: Th... |
1151 1152 1153 1154 1155 1156 1157 |
if (convert) lockres->l_action = OCFS2_AST_INVALID; else lockres->l_unlock_action = OCFS2_UNLOCK_INVALID; spin_unlock_irqrestore(&lockres->l_lock, flags); wake_up(&lockres->l_event); |
ccd979bdb [PATCH] OCFS2: Th... |
1158 1159 1160 1161 1162 1163 1164 1165 1166 |
} /* Note: If we detect another process working on the lock (i.e., * OCFS2_LOCK_BUSY), we'll bail out returning 0. It's up to the caller * to do the right thing in that case. */ static int ocfs2_lock_create(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres, int level, |
bd3e76105 ocfs2: Use global... |
1167 |
u32 dlm_flags) |
ccd979bdb [PATCH] OCFS2: Th... |
1168 1169 |
{ int ret = 0; |
ccd979bdb [PATCH] OCFS2: Th... |
1170 |
unsigned long flags; |
de551246e ocfs2: Remove CAN... |
1171 |
unsigned int gen; |
ccd979bdb [PATCH] OCFS2: Th... |
1172 |
|
bd3e76105 ocfs2: Use global... |
1173 1174 |
mlog(0, "lock %s, level = %d, flags = %u ", lockres->l_name, level, |
ccd979bdb [PATCH] OCFS2: Th... |
1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 |
dlm_flags); spin_lock_irqsave(&lockres->l_lock, flags); if ((lockres->l_flags & OCFS2_LOCK_ATTACHED) || (lockres->l_flags & OCFS2_LOCK_BUSY)) { spin_unlock_irqrestore(&lockres->l_lock, flags); goto bail; } lockres->l_action = OCFS2_AST_ATTACH; lockres->l_requested = level; lockres_or_flags(lockres, OCFS2_LOCK_BUSY); |
de551246e ocfs2: Remove CAN... |
1187 |
gen = lockres_set_pending(lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
1188 |
spin_unlock_irqrestore(&lockres->l_lock, flags); |
4670c46de ocfs2: Introduce ... |
1189 |
ret = ocfs2_dlm_lock(osb->cconn, |
7431cd7e8 ocfs2: Use -errno... |
1190 1191 1192 1193 |
level, &lockres->l_lksb, dlm_flags, lockres->l_name, |
a796d2862 ocfs2: Pass lksbs... |
1194 |
OCFS2_LOCK_ID_MAX_LEN - 1); |
de551246e ocfs2: Remove CAN... |
1195 |
lockres_clear_pending(lockres, gen, osb); |
7431cd7e8 ocfs2: Use -errno... |
1196 1197 |
if (ret) { ocfs2_log_dlm_error("ocfs2_dlm_lock", ret, lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
1198 1199 |
ocfs2_recover_from_dlm_error(lockres, 1); } |
7431cd7e8 ocfs2: Use -errno... |
1200 1201 |
mlog(0, "lock %s, return from ocfs2_dlm_lock ", lockres->l_name); |
ccd979bdb [PATCH] OCFS2: Th... |
1202 1203 |
bail: |
ccd979bdb [PATCH] OCFS2: Th... |
1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 |
return ret; } static inline int ocfs2_check_wait_flag(struct ocfs2_lock_res *lockres, int flag) { unsigned long flags; int ret; spin_lock_irqsave(&lockres->l_lock, flags); ret = lockres->l_flags & flag; spin_unlock_irqrestore(&lockres->l_lock, flags); return ret; } static inline void ocfs2_wait_on_busy_lock(struct ocfs2_lock_res *lockres) { wait_event(lockres->l_event, !ocfs2_check_wait_flag(lockres, OCFS2_LOCK_BUSY)); } static inline void ocfs2_wait_on_refreshing_lock(struct ocfs2_lock_res *lockres) { wait_event(lockres->l_event, !ocfs2_check_wait_flag(lockres, OCFS2_LOCK_REFRESHING)); } /* predict what lock level we'll be dropping down to on behalf * of another node, and return true if the currently wanted * level will be compatible with it. */ static inline int ocfs2_may_continue_on_blocked_lock(struct ocfs2_lock_res *lockres, int wanted) { BUG_ON(!(lockres->l_flags & OCFS2_LOCK_BLOCKED)); return wanted <= ocfs2_highest_compat_lock_level(lockres->l_blocking); } static void ocfs2_init_mask_waiter(struct ocfs2_mask_waiter *mw) { INIT_LIST_HEAD(&mw->mw_item); init_completion(&mw->mw_complete); |
8ddb7b004 [PATCH 2/2] ocfs2... |
1249 |
ocfs2_init_start_time(mw); |
ccd979bdb [PATCH] OCFS2: Th... |
1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 |
} static int ocfs2_wait_for_mask(struct ocfs2_mask_waiter *mw) { wait_for_completion(&mw->mw_complete); /* Re-arm the completion in case we want to wait on it again */ INIT_COMPLETION(mw->mw_complete); return mw->mw_status; } static void lockres_add_mask_waiter(struct ocfs2_lock_res *lockres, struct ocfs2_mask_waiter *mw, unsigned long mask, unsigned long goal) { BUG_ON(!list_empty(&mw->mw_item)); assert_spin_locked(&lockres->l_lock); list_add_tail(&mw->mw_item, &lockres->l_mask_waiters); mw->mw_mask = mask; mw->mw_goal = goal; } /* returns 0 if the mw that was removed was already satisfied, -EBUSY * if the mask still hadn't reached its goal */ static int lockres_remove_mask_waiter(struct ocfs2_lock_res *lockres, struct ocfs2_mask_waiter *mw) { unsigned long flags; int ret = 0; spin_lock_irqsave(&lockres->l_lock, flags); if (!list_empty(&mw->mw_item)) { if ((lockres->l_flags & mw->mw_mask) != mw->mw_goal) ret = -EBUSY; list_del_init(&mw->mw_item); init_completion(&mw->mw_complete); } spin_unlock_irqrestore(&lockres->l_lock, flags); return ret; } |
cf8e06f1a [PATCH 1/2] ocfs2... |
1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 |
static int ocfs2_wait_for_mask_interruptible(struct ocfs2_mask_waiter *mw, struct ocfs2_lock_res *lockres) { int ret; ret = wait_for_completion_interruptible(&mw->mw_complete); if (ret) lockres_remove_mask_waiter(lockres, mw); else ret = mw->mw_status; /* Re-arm the completion in case we want to wait on it again */ INIT_COMPLETION(mw->mw_complete); return ret; } |
cb25797d4 ocfs2: Add lockde... |
1309 1310 1311 1312 1313 1314 1315 |
static int __ocfs2_cluster_lock(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres, int level, u32 lkm_flags, int arg_flags, int l_subclass, unsigned long caller_ip) |
ccd979bdb [PATCH] OCFS2: Th... |
1316 1317 |
{ struct ocfs2_mask_waiter mw; |
ccd979bdb [PATCH] OCFS2: Th... |
1318 1319 1320 |
int wait, catch_signals = !(osb->s_mount_opt & OCFS2_MOUNT_NOINTR); int ret = 0; /* gcc doesn't realize wait = 1 guarantees ret is set */ unsigned long flags; |
de551246e ocfs2: Remove CAN... |
1321 |
unsigned int gen; |
1693a5c01 ocfs2: handle asy... |
1322 |
int noqueue_attempted = 0; |
ccd979bdb [PATCH] OCFS2: Th... |
1323 |
|
ccd979bdb [PATCH] OCFS2: Th... |
1324 |
ocfs2_init_mask_waiter(&mw); |
b80fc012e ocfs2: don't unco... |
1325 |
if (lockres->l_ops->flags & LOCK_TYPE_USES_LVB) |
bd3e76105 ocfs2: Use global... |
1326 |
lkm_flags |= DLM_LKF_VALBLK; |
b80fc012e ocfs2: don't unco... |
1327 |
|
ccd979bdb [PATCH] OCFS2: Th... |
1328 1329 |
again: wait = 0; |
a19128260 ocfs2: Prevent a ... |
1330 |
spin_lock_irqsave(&lockres->l_lock, flags); |
ccd979bdb [PATCH] OCFS2: Th... |
1331 1332 |
if (catch_signals && signal_pending(current)) { ret = -ERESTARTSYS; |
a19128260 ocfs2: Prevent a ... |
1333 |
goto unlock; |
ccd979bdb [PATCH] OCFS2: Th... |
1334 |
} |
ccd979bdb [PATCH] OCFS2: Th... |
1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 |
mlog_bug_on_msg(lockres->l_flags & OCFS2_LOCK_FREEING, "Cluster lock called on freeing lockres %s! flags " "0x%lx ", lockres->l_name, lockres->l_flags); /* We only compare against the currently granted level * here. If the lock is blocked waiting on a downconvert, * we'll get caught below. */ if (lockres->l_flags & OCFS2_LOCK_BUSY && level > lockres->l_level) { /* is someone sitting in dlm_lock? If so, wait on * them. */ lockres_add_mask_waiter(lockres, &mw, OCFS2_LOCK_BUSY, 0); wait = 1; goto unlock; } |
a19128260 ocfs2: Prevent a ... |
1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 |
if (lockres->l_flags & OCFS2_LOCK_UPCONVERT_FINISHING) { /* * We've upconverted. If the lock now has a level we can * work with, we take it. If, however, the lock is not at the * required level, we go thru the full cycle. One way this could * happen is if a process requesting an upconvert to PR is * closely followed by another requesting upconvert to an EX. * If the process requesting EX lands here, we want it to * continue attempting to upconvert and let the process * requesting PR take the lock. * If multiple processes request upconvert to PR, the first one * here will take the lock. The others will have to go thru the * OCFS2_LOCK_BLOCKED check to ensure that there is no pending * downconvert request. */ if (level <= lockres->l_level) goto update_holders; } |
ccd979bdb [PATCH] OCFS2: Th... |
1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 |
if (lockres->l_flags & OCFS2_LOCK_BLOCKED && !ocfs2_may_continue_on_blocked_lock(lockres, level)) { /* is the lock is currently blocked on behalf of * another node */ lockres_add_mask_waiter(lockres, &mw, OCFS2_LOCK_BLOCKED, 0); wait = 1; goto unlock; } if (level > lockres->l_level) { |
1693a5c01 ocfs2: handle asy... |
1379 1380 1381 1382 1383 1384 |
if (noqueue_attempted > 0) { ret = -EAGAIN; goto unlock; } if (lkm_flags & DLM_LKF_NOQUEUE) noqueue_attempted = 1; |
ccd979bdb [PATCH] OCFS2: Th... |
1385 1386 1387 1388 |
if (lockres->l_action != OCFS2_AST_INVALID) mlog(ML_ERROR, "lockres %s has action %u pending ", lockres->l_name, lockres->l_action); |
019d1b224 ocfs2: Create loc... |
1389 1390 |
if (!(lockres->l_flags & OCFS2_LOCK_ATTACHED)) { lockres->l_action = OCFS2_AST_ATTACH; |
bd3e76105 ocfs2: Use global... |
1391 |
lkm_flags &= ~DLM_LKF_CONVERT; |
019d1b224 ocfs2: Create loc... |
1392 1393 |
} else { lockres->l_action = OCFS2_AST_CONVERT; |
bd3e76105 ocfs2: Use global... |
1394 |
lkm_flags |= DLM_LKF_CONVERT; |
019d1b224 ocfs2: Create loc... |
1395 |
} |
ccd979bdb [PATCH] OCFS2: Th... |
1396 1397 |
lockres->l_requested = level; lockres_or_flags(lockres, OCFS2_LOCK_BUSY); |
de551246e ocfs2: Remove CAN... |
1398 |
gen = lockres_set_pending(lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
1399 |
spin_unlock_irqrestore(&lockres->l_lock, flags); |
bd3e76105 ocfs2: Use global... |
1400 1401 |
BUG_ON(level == DLM_LOCK_IV); BUG_ON(level == DLM_LOCK_NL); |
ccd979bdb [PATCH] OCFS2: Th... |
1402 |
|
9b915181a ocfs2: Use a sepa... |
1403 1404 |
mlog(ML_BASTS, "lockres %s, convert from %d to %d ", |
ccd979bdb [PATCH] OCFS2: Th... |
1405 1406 1407 |
lockres->l_name, lockres->l_level, level); /* call dlm_lock to upgrade lock now */ |
4670c46de ocfs2: Introduce ... |
1408 |
ret = ocfs2_dlm_lock(osb->cconn, |
7431cd7e8 ocfs2: Use -errno... |
1409 1410 1411 1412 |
level, &lockres->l_lksb, lkm_flags, lockres->l_name, |
a796d2862 ocfs2: Pass lksbs... |
1413 |
OCFS2_LOCK_ID_MAX_LEN - 1); |
de551246e ocfs2: Remove CAN... |
1414 |
lockres_clear_pending(lockres, gen, osb); |
7431cd7e8 ocfs2: Use -errno... |
1415 1416 1417 |
if (ret) { if (!(lkm_flags & DLM_LKF_NOQUEUE) || (ret != -EAGAIN)) { |
24ef1815e ocfs2: Separate o... |
1418 |
ocfs2_log_dlm_error("ocfs2_dlm_lock", |
7431cd7e8 ocfs2: Use -errno... |
1419 |
ret, lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
1420 1421 1422 1423 |
} ocfs2_recover_from_dlm_error(lockres, 1); goto out; } |
73ac36ea1 fix similar typos... |
1424 1425 |
mlog(0, "lock %s, successful return from ocfs2_dlm_lock ", |
ccd979bdb [PATCH] OCFS2: Th... |
1426 1427 1428 1429 1430 1431 1432 1433 1434 |
lockres->l_name); /* At this point we've gone inside the dlm and need to * complete our work regardless. */ catch_signals = 0; /* wait for busy to clear and carry on */ goto again; } |
a19128260 ocfs2: Prevent a ... |
1435 |
update_holders: |
ccd979bdb [PATCH] OCFS2: Th... |
1436 1437 1438 1439 1440 |
/* Ok, if we get here then we're good to go. */ ocfs2_inc_holders(lockres, level); ret = 0; unlock: |
a19128260 ocfs2: Prevent a ... |
1441 |
lockres_clear_flags(lockres, OCFS2_LOCK_UPCONVERT_FINISHING); |
ccd979bdb [PATCH] OCFS2: Th... |
1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 |
spin_unlock_irqrestore(&lockres->l_lock, flags); out: /* * This is helping work around a lock inversion between the page lock * and dlm locks. One path holds the page lock while calling aops * which block acquiring dlm locks. The voting thread holds dlm * locks while acquiring page locks while down converting data locks. * This block is helping an aop path notice the inversion and back * off to unlock its page lock before trying the dlm lock again. */ if (wait && arg_flags & OCFS2_LOCK_NONBLOCK && mw.mw_mask & (OCFS2_LOCK_BUSY|OCFS2_LOCK_BLOCKED)) { wait = 0; if (lockres_remove_mask_waiter(lockres, &mw)) ret = -EAGAIN; else goto again; } if (wait) { ret = ocfs2_wait_for_mask(&mw); if (ret == 0) goto again; mlog_errno(ret); } |
8ddb7b004 [PATCH 2/2] ocfs2... |
1466 |
ocfs2_update_lock_stats(lockres, level, &mw, ret); |
ccd979bdb [PATCH] OCFS2: Th... |
1467 |
|
cb25797d4 ocfs2: Add lockde... |
1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 |
#ifdef CONFIG_DEBUG_LOCK_ALLOC if (!ret && lockres->l_lockdep_map.key != NULL) { if (level == DLM_LOCK_PR) rwsem_acquire_read(&lockres->l_lockdep_map, l_subclass, !!(arg_flags & OCFS2_META_LOCK_NOQUEUE), caller_ip); else rwsem_acquire(&lockres->l_lockdep_map, l_subclass, !!(arg_flags & OCFS2_META_LOCK_NOQUEUE), caller_ip); } #endif |
ccd979bdb [PATCH] OCFS2: Th... |
1480 1481 |
return ret; } |
cb25797d4 ocfs2: Add lockde... |
1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 |
static inline int ocfs2_cluster_lock(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres, int level, u32 lkm_flags, int arg_flags) { return __ocfs2_cluster_lock(osb, lockres, level, lkm_flags, arg_flags, 0, _RET_IP_); } static void __ocfs2_cluster_unlock(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres, int level, unsigned long caller_ip) |
ccd979bdb [PATCH] OCFS2: Th... |
1497 1498 |
{ unsigned long flags; |
ccd979bdb [PATCH] OCFS2: Th... |
1499 1500 |
spin_lock_irqsave(&lockres->l_lock, flags); ocfs2_dec_holders(lockres, level); |
34d024f84 ocfs2: Remove mou... |
1501 |
ocfs2_downconvert_on_unlock(osb, lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
1502 |
spin_unlock_irqrestore(&lockres->l_lock, flags); |
cb25797d4 ocfs2: Add lockde... |
1503 1504 1505 1506 |
#ifdef CONFIG_DEBUG_LOCK_ALLOC if (lockres->l_lockdep_map.key != NULL) rwsem_release(&lockres->l_lockdep_map, 1, caller_ip); #endif |
ccd979bdb [PATCH] OCFS2: Th... |
1507 |
} |
da66116ee [2.6 patch] make ... |
1508 1509 1510 1511 |
static int ocfs2_create_new_lock(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres, int ex, int local) |
ccd979bdb [PATCH] OCFS2: Th... |
1512 |
{ |
bd3e76105 ocfs2: Use global... |
1513 |
int level = ex ? DLM_LOCK_EX : DLM_LOCK_PR; |
ccd979bdb [PATCH] OCFS2: Th... |
1514 |
unsigned long flags; |
bd3e76105 ocfs2: Use global... |
1515 |
u32 lkm_flags = local ? DLM_LKF_LOCAL : 0; |
ccd979bdb [PATCH] OCFS2: Th... |
1516 1517 1518 1519 1520 |
spin_lock_irqsave(&lockres->l_lock, flags); BUG_ON(lockres->l_flags & OCFS2_LOCK_ATTACHED); lockres_or_flags(lockres, OCFS2_LOCK_LOCAL); spin_unlock_irqrestore(&lockres->l_lock, flags); |
24c19ef40 ocfs2: Remove i_g... |
1521 |
return ocfs2_lock_create(osb, lockres, level, lkm_flags); |
ccd979bdb [PATCH] OCFS2: Th... |
1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 |
} /* Grants us an EX lock on the data and metadata resources, skipping * the normal cluster directory lookup. Use this ONLY on newly created * inodes which other nodes can't possibly see, and which haven't been * hashed in the inode hash yet. This can give us a good performance * increase as it'll skip the network broadcast normally associated * with creating a new lock resource. */ int ocfs2_create_new_inode_locks(struct inode *inode) { int ret; |
d680efe9d ocfs2: Add new cl... |
1533 |
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
ccd979bdb [PATCH] OCFS2: Th... |
1534 1535 1536 |
BUG_ON(!inode); BUG_ON(!ocfs2_inode_is_new(inode)); |
b0697053f ocfs2: don't use ... |
1537 1538 |
mlog(0, "Inode %llu ", (unsigned long long)OCFS2_I(inode)->ip_blkno); |
ccd979bdb [PATCH] OCFS2: Th... |
1539 1540 1541 1542 1543 1544 1545 1546 |
/* NOTE: That we don't increment any of the holder counts, nor * do we add anything to a journal handle. Since this is * supposed to be a new inode which the cluster doesn't know * about yet, there is no need to. As far as the LVB handling * is concerned, this is basically like acquiring an EX lock * on a resource which has an invalid one -- we'll set it * valid when we release the EX. */ |
24c19ef40 ocfs2: Remove i_g... |
1547 |
ret = ocfs2_create_new_lock(osb, &OCFS2_I(inode)->ip_rw_lockres, 1, 1); |
ccd979bdb [PATCH] OCFS2: Th... |
1548 1549 1550 1551 |
if (ret) { mlog_errno(ret); goto bail; } |
24c19ef40 ocfs2: Remove i_g... |
1552 |
/* |
bd3e76105 ocfs2: Use global... |
1553 |
* We don't want to use DLM_LKF_LOCAL on a meta data lock as they |
24c19ef40 ocfs2: Remove i_g... |
1554 1555 |
* don't use a generation in their lock names. */ |
e63aecb65 ocfs2: Rename ocf... |
1556 |
ret = ocfs2_create_new_lock(osb, &OCFS2_I(inode)->ip_inode_lockres, 1, 0); |
ccd979bdb [PATCH] OCFS2: Th... |
1557 1558 1559 1560 |
if (ret) { mlog_errno(ret); goto bail; } |
500086300 ocfs2: Remove del... |
1561 1562 1563 1564 1565 |
ret = ocfs2_create_new_lock(osb, &OCFS2_I(inode)->ip_open_lockres, 0, 0); if (ret) { mlog_errno(ret); goto bail; } |
ccd979bdb [PATCH] OCFS2: Th... |
1566 |
bail: |
ccd979bdb [PATCH] OCFS2: Th... |
1567 1568 1569 1570 1571 1572 1573 |
return ret; } int ocfs2_rw_lock(struct inode *inode, int write) { int status, level; struct ocfs2_lock_res *lockres; |
c271c5c22 ocfs2: local mounts |
1574 |
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
ccd979bdb [PATCH] OCFS2: Th... |
1575 1576 |
BUG_ON(!inode); |
b0697053f ocfs2: don't use ... |
1577 1578 1579 |
mlog(0, "inode %llu take %s RW lock ", (unsigned long long)OCFS2_I(inode)->ip_blkno, |
ccd979bdb [PATCH] OCFS2: Th... |
1580 |
write ? "EXMODE" : "PRMODE"); |
c1e8d35ef ocfs2: Remove EXI... |
1581 |
if (ocfs2_mount_local(osb)) |
c271c5c22 ocfs2: local mounts |
1582 |
return 0; |
ccd979bdb [PATCH] OCFS2: Th... |
1583 |
lockres = &OCFS2_I(inode)->ip_rw_lockres; |
bd3e76105 ocfs2: Use global... |
1584 |
level = write ? DLM_LOCK_EX : DLM_LOCK_PR; |
ccd979bdb [PATCH] OCFS2: Th... |
1585 1586 1587 1588 1589 |
status = ocfs2_cluster_lock(OCFS2_SB(inode->i_sb), lockres, level, 0, 0); if (status < 0) mlog_errno(status); |
ccd979bdb [PATCH] OCFS2: Th... |
1590 1591 1592 1593 1594 |
return status; } void ocfs2_rw_unlock(struct inode *inode, int write) { |
bd3e76105 ocfs2: Use global... |
1595 |
int level = write ? DLM_LOCK_EX : DLM_LOCK_PR; |
ccd979bdb [PATCH] OCFS2: Th... |
1596 |
struct ocfs2_lock_res *lockres = &OCFS2_I(inode)->ip_rw_lockres; |
c271c5c22 ocfs2: local mounts |
1597 |
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
ccd979bdb [PATCH] OCFS2: Th... |
1598 |
|
b0697053f ocfs2: don't use ... |
1599 1600 1601 |
mlog(0, "inode %llu drop %s RW lock ", (unsigned long long)OCFS2_I(inode)->ip_blkno, |
ccd979bdb [PATCH] OCFS2: Th... |
1602 |
write ? "EXMODE" : "PRMODE"); |
c271c5c22 ocfs2: local mounts |
1603 1604 |
if (!ocfs2_mount_local(osb)) ocfs2_cluster_unlock(OCFS2_SB(inode->i_sb), lockres, level); |
ccd979bdb [PATCH] OCFS2: Th... |
1605 |
} |
500086300 ocfs2: Remove del... |
1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 |
/* * ocfs2_open_lock always get PR mode lock. */ int ocfs2_open_lock(struct inode *inode) { int status = 0; struct ocfs2_lock_res *lockres; struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); BUG_ON(!inode); |
500086300 ocfs2: Remove del... |
1616 1617 1618 |
mlog(0, "inode %llu take PRMODE open lock ", (unsigned long long)OCFS2_I(inode)->ip_blkno); |
03efed8a2 ocfs2: Bugfix for... |
1619 |
if (ocfs2_is_hard_readonly(osb) || ocfs2_mount_local(osb)) |
500086300 ocfs2: Remove del... |
1620 1621 1622 1623 1624 |
goto out; lockres = &OCFS2_I(inode)->ip_open_lockres; status = ocfs2_cluster_lock(OCFS2_SB(inode->i_sb), lockres, |
bd3e76105 ocfs2: Use global... |
1625 |
DLM_LOCK_PR, 0, 0); |
500086300 ocfs2: Remove del... |
1626 1627 1628 1629 |
if (status < 0) mlog_errno(status); out: |
500086300 ocfs2: Remove del... |
1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 |
return status; } int ocfs2_try_open_lock(struct inode *inode, int write) { int status = 0, level; struct ocfs2_lock_res *lockres; struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); BUG_ON(!inode); |
500086300 ocfs2: Remove del... |
1640 1641 1642 1643 |
mlog(0, "inode %llu try to take %s open lock ", (unsigned long long)OCFS2_I(inode)->ip_blkno, write ? "EXMODE" : "PRMODE"); |
03efed8a2 ocfs2: Bugfix for... |
1644 1645 1646 1647 1648 |
if (ocfs2_is_hard_readonly(osb)) { if (write) status = -EROFS; goto out; } |
500086300 ocfs2: Remove del... |
1649 1650 1651 1652 |
if (ocfs2_mount_local(osb)) goto out; lockres = &OCFS2_I(inode)->ip_open_lockres; |
bd3e76105 ocfs2: Use global... |
1653 |
level = write ? DLM_LOCK_EX : DLM_LOCK_PR; |
500086300 ocfs2: Remove del... |
1654 1655 1656 |
/* * The file system may already holding a PRMODE/EXMODE open lock. |
bd3e76105 ocfs2: Use global... |
1657 |
* Since we pass DLM_LKF_NOQUEUE, the request won't block waiting on |
500086300 ocfs2: Remove del... |
1658 1659 1660 1661 |
* other nodes and the -EAGAIN will indicate to the caller that * this inode is still in use. */ status = ocfs2_cluster_lock(OCFS2_SB(inode->i_sb), lockres, |
bd3e76105 ocfs2: Use global... |
1662 |
level, DLM_LKF_NOQUEUE, 0); |
500086300 ocfs2: Remove del... |
1663 1664 |
out: |
500086300 ocfs2: Remove del... |
1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 |
return status; } /* * ocfs2_open_unlock unlock PR and EX mode open locks. */ void ocfs2_open_unlock(struct inode *inode) { struct ocfs2_lock_res *lockres = &OCFS2_I(inode)->ip_open_lockres; struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
500086300 ocfs2: Remove del... |
1675 1676 1677 1678 1679 1680 1681 1682 1683 |
mlog(0, "inode %llu drop open lock ", (unsigned long long)OCFS2_I(inode)->ip_blkno); if (ocfs2_mount_local(osb)) goto out; if(lockres->l_ro_holders) ocfs2_cluster_unlock(OCFS2_SB(inode->i_sb), lockres, |
bd3e76105 ocfs2: Use global... |
1684 |
DLM_LOCK_PR); |
500086300 ocfs2: Remove del... |
1685 1686 |
if(lockres->l_ex_holders) ocfs2_cluster_unlock(OCFS2_SB(inode->i_sb), lockres, |
bd3e76105 ocfs2: Use global... |
1687 |
DLM_LOCK_EX); |
500086300 ocfs2: Remove del... |
1688 1689 |
out: |
c1e8d35ef ocfs2: Remove EXI... |
1690 |
return; |
500086300 ocfs2: Remove del... |
1691 |
} |
cf8e06f1a [PATCH 1/2] ocfs2... |
1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 |
static int ocfs2_flock_handle_signal(struct ocfs2_lock_res *lockres, int level) { int ret; struct ocfs2_super *osb = ocfs2_get_lockres_osb(lockres); unsigned long flags; struct ocfs2_mask_waiter mw; ocfs2_init_mask_waiter(&mw); retry_cancel: spin_lock_irqsave(&lockres->l_lock, flags); if (lockres->l_flags & OCFS2_LOCK_BUSY) { ret = ocfs2_prepare_cancel_convert(osb, lockres); if (ret) { spin_unlock_irqrestore(&lockres->l_lock, flags); ret = ocfs2_cancel_convert(osb, lockres); if (ret < 0) { mlog_errno(ret); goto out; } goto retry_cancel; } lockres_add_mask_waiter(lockres, &mw, OCFS2_LOCK_BUSY, 0); spin_unlock_irqrestore(&lockres->l_lock, flags); ocfs2_wait_for_mask(&mw); goto retry_cancel; } ret = -ERESTARTSYS; /* * We may still have gotten the lock, in which case there's no * point to restarting the syscall. */ if (lockres->l_level == level) ret = 0; mlog(0, "Cancel returning %d. flags: 0x%lx, level: %d, act: %d ", ret, lockres->l_flags, lockres->l_level, lockres->l_action); spin_unlock_irqrestore(&lockres->l_lock, flags); out: return ret; } /* * ocfs2_file_lock() and ocfs2_file_unlock() map to a single pair of * flock() calls. The locking approach this requires is sufficiently * different from all other cluster lock types that we implement a |
3ad2f3fbb tree-wide: Assort... |
1744 |
* separate path to the "low-level" dlm calls. In particular: |
cf8e06f1a [PATCH 1/2] ocfs2... |
1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 |
* * - No optimization of lock levels is done - we take at exactly * what's been requested. * * - No lock caching is employed. We immediately downconvert to * no-lock at unlock time. This also means flock locks never go on * the blocking list). * * - Since userspace can trivially deadlock itself with flock, we make * sure to allow cancellation of a misbehaving applications flock() * request. * * - Access to any flock lockres doesn't require concurrency, so we * can simplify the code by requiring the caller to guarantee * serialization of dlmglue flock calls. */ int ocfs2_file_lock(struct file *file, int ex, int trylock) { |
e988cf1cf ocfs2: Fix flags ... |
1763 1764 |
int ret, level = ex ? DLM_LOCK_EX : DLM_LOCK_PR; unsigned int lkm_flags = trylock ? DLM_LKF_NOQUEUE : 0; |
cf8e06f1a [PATCH 1/2] ocfs2... |
1765 1766 1767 1768 1769 1770 1771 1772 1773 |
unsigned long flags; struct ocfs2_file_private *fp = file->private_data; struct ocfs2_lock_res *lockres = &fp->fp_flock; struct ocfs2_super *osb = OCFS2_SB(file->f_mapping->host->i_sb); struct ocfs2_mask_waiter mw; ocfs2_init_mask_waiter(&mw); if ((lockres->l_flags & OCFS2_LOCK_BUSY) || |
bd3e76105 ocfs2: Use global... |
1774 |
(lockres->l_level > DLM_LOCK_NL)) { |
cf8e06f1a [PATCH 1/2] ocfs2... |
1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 |
mlog(ML_ERROR, "File lock \"%s\" has busy or locked state: flags: 0x%lx, " "level: %u ", lockres->l_name, lockres->l_flags, lockres->l_level); return -EINVAL; } spin_lock_irqsave(&lockres->l_lock, flags); if (!(lockres->l_flags & OCFS2_LOCK_ATTACHED)) { lockres_add_mask_waiter(lockres, &mw, OCFS2_LOCK_BUSY, 0); spin_unlock_irqrestore(&lockres->l_lock, flags); /* * Get the lock at NLMODE to start - that way we * can cancel the upconvert request if need be. */ |
e988cf1cf ocfs2: Fix flags ... |
1792 |
ret = ocfs2_lock_create(osb, lockres, DLM_LOCK_NL, 0); |
cf8e06f1a [PATCH 1/2] ocfs2... |
1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 |
if (ret < 0) { mlog_errno(ret); goto out; } ret = ocfs2_wait_for_mask(&mw); if (ret) { mlog_errno(ret); goto out; } spin_lock_irqsave(&lockres->l_lock, flags); } lockres->l_action = OCFS2_AST_CONVERT; |
e988cf1cf ocfs2: Fix flags ... |
1807 |
lkm_flags |= DLM_LKF_CONVERT; |
cf8e06f1a [PATCH 1/2] ocfs2... |
1808 1809 1810 1811 1812 |
lockres->l_requested = level; lockres_or_flags(lockres, OCFS2_LOCK_BUSY); lockres_add_mask_waiter(lockres, &mw, OCFS2_LOCK_BUSY, 0); spin_unlock_irqrestore(&lockres->l_lock, flags); |
4670c46de ocfs2: Introduce ... |
1813 |
ret = ocfs2_dlm_lock(osb->cconn, level, &lockres->l_lksb, lkm_flags, |
a796d2862 ocfs2: Pass lksbs... |
1814 |
lockres->l_name, OCFS2_LOCK_ID_MAX_LEN - 1); |
7431cd7e8 ocfs2: Use -errno... |
1815 1816 |
if (ret) { if (!trylock || (ret != -EAGAIN)) { |
24ef1815e ocfs2: Separate o... |
1817 |
ocfs2_log_dlm_error("ocfs2_dlm_lock", ret, lockres); |
cf8e06f1a [PATCH 1/2] ocfs2... |
1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 |
ret = -EINVAL; } ocfs2_recover_from_dlm_error(lockres, 1); lockres_remove_mask_waiter(lockres, &mw); goto out; } ret = ocfs2_wait_for_mask_interruptible(&mw, lockres); if (ret == -ERESTARTSYS) { /* * Userspace can cause deadlock itself with * flock(). Current behavior locally is to allow the * deadlock, but abort the system call if a signal is * received. We follow this example, otherwise a * poorly written program could sit in kernel until * reboot. * * Handling this is a bit more complicated for Ocfs2 * though. We can't exit this function with an * outstanding lock request, so a cancel convert is * required. We intentionally overwrite 'ret' - if the * cancel fails and the lock was granted, it's easier |
af901ca18 tree-wide: fix as... |
1841 |
* to just bubble success back up to the user. |
cf8e06f1a [PATCH 1/2] ocfs2... |
1842 1843 |
*/ ret = ocfs2_flock_handle_signal(lockres, level); |
1693a5c01 ocfs2: handle asy... |
1844 1845 1846 1847 |
} else if (!ret && (level > lockres->l_level)) { /* Trylock failed asynchronously */ BUG_ON(!trylock); ret = -EAGAIN; |
cf8e06f1a [PATCH 1/2] ocfs2... |
1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 |
} out: mlog(0, "Lock: \"%s\" ex: %d, trylock: %d, returns: %d ", lockres->l_name, ex, trylock, ret); return ret; } void ocfs2_file_unlock(struct file *file) { int ret; |
de551246e ocfs2: Remove CAN... |
1861 |
unsigned int gen; |
cf8e06f1a [PATCH 1/2] ocfs2... |
1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 |
unsigned long flags; struct ocfs2_file_private *fp = file->private_data; struct ocfs2_lock_res *lockres = &fp->fp_flock; struct ocfs2_super *osb = OCFS2_SB(file->f_mapping->host->i_sb); struct ocfs2_mask_waiter mw; ocfs2_init_mask_waiter(&mw); if (!(lockres->l_flags & OCFS2_LOCK_ATTACHED)) return; |
e988cf1cf ocfs2: Fix flags ... |
1872 |
if (lockres->l_level == DLM_LOCK_NL) |
cf8e06f1a [PATCH 1/2] ocfs2... |
1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 |
return; mlog(0, "Unlock: \"%s\" flags: 0x%lx, level: %d, act: %d ", lockres->l_name, lockres->l_flags, lockres->l_level, lockres->l_action); spin_lock_irqsave(&lockres->l_lock, flags); /* * Fake a blocking ast for the downconvert code. */ lockres_or_flags(lockres, OCFS2_LOCK_BLOCKED); |
bd3e76105 ocfs2: Use global... |
1885 |
lockres->l_blocking = DLM_LOCK_EX; |
cf8e06f1a [PATCH 1/2] ocfs2... |
1886 |
|
e988cf1cf ocfs2: Fix flags ... |
1887 |
gen = ocfs2_prepare_downconvert(lockres, DLM_LOCK_NL); |
cf8e06f1a [PATCH 1/2] ocfs2... |
1888 1889 |
lockres_add_mask_waiter(lockres, &mw, OCFS2_LOCK_BUSY, 0); spin_unlock_irqrestore(&lockres->l_lock, flags); |
e988cf1cf ocfs2: Fix flags ... |
1890 |
ret = ocfs2_downconvert_lock(osb, lockres, DLM_LOCK_NL, 0, gen); |
cf8e06f1a [PATCH 1/2] ocfs2... |
1891 1892 1893 1894 1895 1896 1897 1898 1899 |
if (ret) { mlog_errno(ret); return; } ret = ocfs2_wait_for_mask(&mw); if (ret) mlog_errno(ret); } |
34d024f84 ocfs2: Remove mou... |
1900 1901 |
static void ocfs2_downconvert_on_unlock(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres) |
ccd979bdb [PATCH] OCFS2: Th... |
1902 1903 |
{ int kick = 0; |
ccd979bdb [PATCH] OCFS2: Th... |
1904 |
/* If we know that another node is waiting on our lock, kick |
34d024f84 ocfs2: Remove mou... |
1905 |
* the downconvert thread * pre-emptively when we reach a release |
ccd979bdb [PATCH] OCFS2: Th... |
1906 1907 1908 |
* condition. */ if (lockres->l_flags & OCFS2_LOCK_BLOCKED) { switch(lockres->l_blocking) { |
bd3e76105 ocfs2: Use global... |
1909 |
case DLM_LOCK_EX: |
ccd979bdb [PATCH] OCFS2: Th... |
1910 1911 1912 |
if (!lockres->l_ex_holders && !lockres->l_ro_holders) kick = 1; break; |
bd3e76105 ocfs2: Use global... |
1913 |
case DLM_LOCK_PR: |
ccd979bdb [PATCH] OCFS2: Th... |
1914 1915 1916 1917 1918 1919 1920 1921 1922 |
if (!lockres->l_ex_holders) kick = 1; break; default: BUG(); } } if (kick) |
34d024f84 ocfs2: Remove mou... |
1923 |
ocfs2_wake_downconvert_thread(osb); |
ccd979bdb [PATCH] OCFS2: Th... |
1924 |
} |
ccd979bdb [PATCH] OCFS2: Th... |
1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 |
#define OCFS2_SEC_BITS 34 #define OCFS2_SEC_SHIFT (64 - 34) #define OCFS2_NSEC_MASK ((1ULL << OCFS2_SEC_SHIFT) - 1) /* LVB only has room for 64 bits of time here so we pack it for * now. */ static u64 ocfs2_pack_timespec(struct timespec *spec) { u64 res; u64 sec = spec->tv_sec; u32 nsec = spec->tv_nsec; res = (sec << OCFS2_SEC_SHIFT) | (nsec & OCFS2_NSEC_MASK); return res; } /* Call this with the lockres locked. I am reasonably sure we don't * need ip_lock in this function as anyone who would be changing those |
e63aecb65 ocfs2: Rename ocf... |
1944 |
* values is supposed to be blocked in ocfs2_inode_lock right now. */ |
ccd979bdb [PATCH] OCFS2: Th... |
1945 1946 1947 |
static void __ocfs2_stuff_meta_lvb(struct inode *inode) { struct ocfs2_inode_info *oi = OCFS2_I(inode); |
e63aecb65 ocfs2: Rename ocf... |
1948 |
struct ocfs2_lock_res *lockres = &oi->ip_inode_lockres; |
ccd979bdb [PATCH] OCFS2: Th... |
1949 |
struct ocfs2_meta_lvb *lvb; |
a641dc2a5 ocfs2: remove unn... |
1950 |
lvb = ocfs2_dlm_lvb(&lockres->l_lksb); |
ccd979bdb [PATCH] OCFS2: Th... |
1951 |
|
24c19ef40 ocfs2: Remove i_g... |
1952 1953 1954 1955 1956 1957 1958 1959 1960 |
/* * Invalidate the LVB of a deleted inode - this way other * nodes are forced to go to disk and discover the new inode * status. */ if (oi->ip_flags & OCFS2_INODE_DELETED) { lvb->lvb_version = 0; goto out; } |
4d3b83f73 ocfs2: Free up so... |
1961 |
lvb->lvb_version = OCFS2_LVB_VERSION; |
ccd979bdb [PATCH] OCFS2: Th... |
1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 |
lvb->lvb_isize = cpu_to_be64(i_size_read(inode)); lvb->lvb_iclusters = cpu_to_be32(oi->ip_clusters); lvb->lvb_iuid = cpu_to_be32(inode->i_uid); lvb->lvb_igid = cpu_to_be32(inode->i_gid); lvb->lvb_imode = cpu_to_be16(inode->i_mode); lvb->lvb_inlink = cpu_to_be16(inode->i_nlink); lvb->lvb_iatime_packed = cpu_to_be64(ocfs2_pack_timespec(&inode->i_atime)); lvb->lvb_ictime_packed = cpu_to_be64(ocfs2_pack_timespec(&inode->i_ctime)); lvb->lvb_imtime_packed = cpu_to_be64(ocfs2_pack_timespec(&inode->i_mtime)); |
ca4d147e6 ocfs2: add ext2 a... |
1974 |
lvb->lvb_iattr = cpu_to_be32(oi->ip_attr); |
15b1e36bd ocfs2: Structure ... |
1975 |
lvb->lvb_idynfeatures = cpu_to_be16(oi->ip_dyn_features); |
f9e2d82e6 ocfs2: Encode i_g... |
1976 |
lvb->lvb_igeneration = cpu_to_be32(inode->i_generation); |
ccd979bdb [PATCH] OCFS2: Th... |
1977 |
|
24c19ef40 ocfs2: Remove i_g... |
1978 |
out: |
ccd979bdb [PATCH] OCFS2: Th... |
1979 |
mlog_meta_lvb(0, lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 |
} static void ocfs2_unpack_timespec(struct timespec *spec, u64 packed_time) { spec->tv_sec = packed_time >> OCFS2_SEC_SHIFT; spec->tv_nsec = packed_time & OCFS2_NSEC_MASK; } static void ocfs2_refresh_inode_from_lvb(struct inode *inode) { struct ocfs2_inode_info *oi = OCFS2_I(inode); |
e63aecb65 ocfs2: Rename ocf... |
1992 |
struct ocfs2_lock_res *lockres = &oi->ip_inode_lockres; |
ccd979bdb [PATCH] OCFS2: Th... |
1993 |
struct ocfs2_meta_lvb *lvb; |
ccd979bdb [PATCH] OCFS2: Th... |
1994 |
mlog_meta_lvb(0, lockres); |
a641dc2a5 ocfs2: remove unn... |
1995 |
lvb = ocfs2_dlm_lvb(&lockres->l_lksb); |
ccd979bdb [PATCH] OCFS2: Th... |
1996 1997 1998 1999 2000 |
/* We're safe here without the lockres lock... */ spin_lock(&oi->ip_lock); oi->ip_clusters = be32_to_cpu(lvb->lvb_iclusters); i_size_write(inode, be64_to_cpu(lvb->lvb_isize)); |
ca4d147e6 ocfs2: add ext2 a... |
2001 |
oi->ip_attr = be32_to_cpu(lvb->lvb_iattr); |
15b1e36bd ocfs2: Structure ... |
2002 |
oi->ip_dyn_features = be16_to_cpu(lvb->lvb_idynfeatures); |
ca4d147e6 ocfs2: add ext2 a... |
2003 |
ocfs2_set_inode_flags(inode); |
ccd979bdb [PATCH] OCFS2: Th... |
2004 2005 2006 2007 |
/* fast-symlinks are a special case */ if (S_ISLNK(inode->i_mode) && !oi->ip_clusters) inode->i_blocks = 0; else |
8110b073a ocfs2: Fix up i_b... |
2008 |
inode->i_blocks = ocfs2_inode_sector_count(inode); |
ccd979bdb [PATCH] OCFS2: Th... |
2009 2010 2011 2012 |
inode->i_uid = be32_to_cpu(lvb->lvb_iuid); inode->i_gid = be32_to_cpu(lvb->lvb_igid); inode->i_mode = be16_to_cpu(lvb->lvb_imode); |
bfe868486 filesystems: add ... |
2013 |
set_nlink(inode, be16_to_cpu(lvb->lvb_inlink)); |
ccd979bdb [PATCH] OCFS2: Th... |
2014 2015 2016 2017 2018 2019 2020 |
ocfs2_unpack_timespec(&inode->i_atime, be64_to_cpu(lvb->lvb_iatime_packed)); ocfs2_unpack_timespec(&inode->i_mtime, be64_to_cpu(lvb->lvb_imtime_packed)); ocfs2_unpack_timespec(&inode->i_ctime, be64_to_cpu(lvb->lvb_ictime_packed)); spin_unlock(&oi->ip_lock); |
ccd979bdb [PATCH] OCFS2: Th... |
2021 |
} |
f9e2d82e6 ocfs2: Encode i_g... |
2022 2023 |
static inline int ocfs2_meta_lvb_is_trustable(struct inode *inode, struct ocfs2_lock_res *lockres) |
ccd979bdb [PATCH] OCFS2: Th... |
2024 |
{ |
a641dc2a5 ocfs2: remove unn... |
2025 |
struct ocfs2_meta_lvb *lvb = ocfs2_dlm_lvb(&lockres->l_lksb); |
ccd979bdb [PATCH] OCFS2: Th... |
2026 |
|
1c520dfbf ocfs2: Provide th... |
2027 2028 |
if (ocfs2_dlm_lvb_valid(&lockres->l_lksb) && lvb->lvb_version == OCFS2_LVB_VERSION |
f9e2d82e6 ocfs2: Encode i_g... |
2029 |
&& be32_to_cpu(lvb->lvb_igeneration) == inode->i_generation) |
ccd979bdb [PATCH] OCFS2: Th... |
2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 |
return 1; return 0; } /* Determine whether a lock resource needs to be refreshed, and * arbitrate who gets to refresh it. * * 0 means no refresh needed. * * > 0 means you need to refresh this and you MUST call * ocfs2_complete_lock_res_refresh afterwards. */ static int ocfs2_should_refresh_lock_res(struct ocfs2_lock_res *lockres) { unsigned long flags; int status = 0; |
ccd979bdb [PATCH] OCFS2: Th... |
2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 |
refresh_check: spin_lock_irqsave(&lockres->l_lock, flags); if (!(lockres->l_flags & OCFS2_LOCK_NEEDS_REFRESH)) { spin_unlock_irqrestore(&lockres->l_lock, flags); goto bail; } if (lockres->l_flags & OCFS2_LOCK_REFRESHING) { spin_unlock_irqrestore(&lockres->l_lock, flags); ocfs2_wait_on_refreshing_lock(lockres); goto refresh_check; } /* Ok, I'll be the one to refresh this lock. */ lockres_or_flags(lockres, OCFS2_LOCK_REFRESHING); spin_unlock_irqrestore(&lockres->l_lock, flags); status = 1; bail: |
c1e8d35ef ocfs2: Remove EXI... |
2065 2066 |
mlog(0, "status %d ", status); |
ccd979bdb [PATCH] OCFS2: Th... |
2067 2068 2069 2070 2071 2072 2073 2074 2075 |
return status; } /* If status is non zero, I'll mark it as not being in refresh * anymroe, but i won't clear the needs refresh flag. */ static inline void ocfs2_complete_lock_res_refresh(struct ocfs2_lock_res *lockres, int status) { unsigned long flags; |
ccd979bdb [PATCH] OCFS2: Th... |
2076 2077 2078 2079 2080 2081 2082 2083 |
spin_lock_irqsave(&lockres->l_lock, flags); lockres_clear_flags(lockres, OCFS2_LOCK_REFRESHING); if (!status) lockres_clear_flags(lockres, OCFS2_LOCK_NEEDS_REFRESH); spin_unlock_irqrestore(&lockres->l_lock, flags); wake_up(&lockres->l_event); |
ccd979bdb [PATCH] OCFS2: Th... |
2084 2085 2086 |
} /* may or may not return a bh if it went to disk. */ |
e63aecb65 ocfs2: Rename ocf... |
2087 |
static int ocfs2_inode_lock_update(struct inode *inode, |
ccd979bdb [PATCH] OCFS2: Th... |
2088 2089 2090 2091 |
struct buffer_head **bh) { int status = 0; struct ocfs2_inode_info *oi = OCFS2_I(inode); |
e63aecb65 ocfs2: Rename ocf... |
2092 |
struct ocfs2_lock_res *lockres = &oi->ip_inode_lockres; |
ccd979bdb [PATCH] OCFS2: Th... |
2093 |
struct ocfs2_dinode *fe; |
c271c5c22 ocfs2: local mounts |
2094 |
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
ccd979bdb [PATCH] OCFS2: Th... |
2095 |
|
be9e986b8 ocfs2: Local moun... |
2096 2097 |
if (ocfs2_mount_local(osb)) goto bail; |
ccd979bdb [PATCH] OCFS2: Th... |
2098 2099 |
spin_lock(&oi->ip_lock); if (oi->ip_flags & OCFS2_INODE_DELETED) { |
b0697053f ocfs2: don't use ... |
2100 |
mlog(0, "Orphaned inode %llu was deleted while we " |
ccd979bdb [PATCH] OCFS2: Th... |
2101 2102 |
"were waiting on a lock. ip_flags = 0x%x ", |
b0697053f ocfs2: don't use ... |
2103 |
(unsigned long long)oi->ip_blkno, oi->ip_flags); |
ccd979bdb [PATCH] OCFS2: Th... |
2104 2105 2106 2107 2108 |
spin_unlock(&oi->ip_lock); status = -ENOENT; goto bail; } spin_unlock(&oi->ip_lock); |
be9e986b8 ocfs2: Local moun... |
2109 2110 |
if (!ocfs2_should_refresh_lock_res(lockres)) goto bail; |
ccd979bdb [PATCH] OCFS2: Th... |
2111 2112 2113 |
/* This will discard any caching information we might have had * for the inode metadata. */ |
8cb471e8f ocfs2: Take the i... |
2114 |
ocfs2_metadata_cache_purge(INODE_CACHE(inode)); |
ccd979bdb [PATCH] OCFS2: Th... |
2115 |
|
834189788 ocfs2: Cache exte... |
2116 |
ocfs2_extent_map_trunc(inode, 0); |
be9e986b8 ocfs2: Local moun... |
2117 |
if (ocfs2_meta_lvb_is_trustable(inode, lockres)) { |
b0697053f ocfs2: don't use ... |
2118 2119 2120 |
mlog(0, "Trusting LVB on inode %llu ", (unsigned long long)oi->ip_blkno); |
ccd979bdb [PATCH] OCFS2: Th... |
2121 2122 2123 2124 |
ocfs2_refresh_inode_from_lvb(inode); } else { /* Boo, we have to go to disk. */ /* read bh, cast, ocfs2_refresh_inode */ |
b657c95c1 ocfs2: Wrap inode... |
2125 |
status = ocfs2_read_inode_block(inode, bh); |
ccd979bdb [PATCH] OCFS2: Th... |
2126 2127 2128 2129 2130 2131 2132 |
if (status < 0) { mlog_errno(status); goto bail_refresh; } fe = (struct ocfs2_dinode *) (*bh)->b_data; /* This is a good chance to make sure we're not |
b657c95c1 ocfs2: Wrap inode... |
2133 2134 |
* locking an invalid object. ocfs2_read_inode_block() * already checked that the inode block is sane. |
ccd979bdb [PATCH] OCFS2: Th... |
2135 2136 2137 2138 2139 2140 |
* * We bug on a stale inode here because we checked * above whether it was wiped from disk. The wiping * node provides a guarantee that we receive that * message and can mark the inode before dropping any * locks associated with it. */ |
ccd979bdb [PATCH] OCFS2: Th... |
2141 2142 |
mlog_bug_on_msg(inode->i_generation != le32_to_cpu(fe->i_generation), |
b0697053f ocfs2: don't use ... |
2143 |
"Invalid dinode %llu disk generation: %u " |
ccd979bdb [PATCH] OCFS2: Th... |
2144 2145 |
"inode->i_generation: %u ", |
b0697053f ocfs2: don't use ... |
2146 2147 |
(unsigned long long)oi->ip_blkno, le32_to_cpu(fe->i_generation), |
ccd979bdb [PATCH] OCFS2: Th... |
2148 2149 2150 |
inode->i_generation); mlog_bug_on_msg(le64_to_cpu(fe->i_dtime) || !(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL)), |
b0697053f ocfs2: don't use ... |
2151 2152 2153 2154 |
"Stale dinode %llu dtime: %llu flags: 0x%x ", (unsigned long long)oi->ip_blkno, (unsigned long long)le64_to_cpu(fe->i_dtime), |
ccd979bdb [PATCH] OCFS2: Th... |
2155 2156 2157 |
le32_to_cpu(fe->i_flags)); ocfs2_refresh_inode(inode, fe); |
8ddb7b004 [PATCH 2/2] ocfs2... |
2158 |
ocfs2_track_lock_refresh(lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
2159 2160 2161 2162 |
} status = 0; bail_refresh: |
be9e986b8 ocfs2: Local moun... |
2163 |
ocfs2_complete_lock_res_refresh(lockres, status); |
ccd979bdb [PATCH] OCFS2: Th... |
2164 |
bail: |
ccd979bdb [PATCH] OCFS2: Th... |
2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 |
return status; } static int ocfs2_assign_bh(struct inode *inode, struct buffer_head **ret_bh, struct buffer_head *passed_bh) { int status; if (passed_bh) { /* Ok, the update went to disk for us, use the * returned bh. */ *ret_bh = passed_bh; get_bh(*ret_bh); return 0; } |
b657c95c1 ocfs2: Wrap inode... |
2182 |
status = ocfs2_read_inode_block(inode, ret_bh); |
ccd979bdb [PATCH] OCFS2: Th... |
2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 |
if (status < 0) mlog_errno(status); return status; } /* * returns < 0 error if the callback will never be called, otherwise * the result of the lock will be communicated via the callback. */ |
cb25797d4 ocfs2: Add lockde... |
2193 2194 2195 2196 2197 |
int ocfs2_inode_lock_full_nested(struct inode *inode, struct buffer_head **ret_bh, int ex, int arg_flags, int subclass) |
ccd979bdb [PATCH] OCFS2: Th... |
2198 |
{ |
bd3e76105 ocfs2: Use global... |
2199 2200 |
int status, level, acquired; u32 dlm_flags; |
c271c5c22 ocfs2: local mounts |
2201 |
struct ocfs2_lock_res *lockres = NULL; |
ccd979bdb [PATCH] OCFS2: Th... |
2202 2203 2204 2205 |
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); struct buffer_head *local_bh = NULL; BUG_ON(!inode); |
b0697053f ocfs2: don't use ... |
2206 2207 2208 |
mlog(0, "inode %llu, take %s META lock ", (unsigned long long)OCFS2_I(inode)->ip_blkno, |
ccd979bdb [PATCH] OCFS2: Th... |
2209 2210 2211 2212 2213 2214 2215 2216 2217 |
ex ? "EXMODE" : "PRMODE"); status = 0; acquired = 0; /* We'll allow faking a readonly metadata lock for * rodevices. */ if (ocfs2_is_hard_readonly(osb)) { if (ex) status = -EROFS; |
03efed8a2 ocfs2: Bugfix for... |
2218 |
goto getbh; |
ccd979bdb [PATCH] OCFS2: Th... |
2219 |
} |
c271c5c22 ocfs2: local mounts |
2220 2221 |
if (ocfs2_mount_local(osb)) goto local; |
ccd979bdb [PATCH] OCFS2: Th... |
2222 |
if (!(arg_flags & OCFS2_META_LOCK_RECOVERY)) |
553abd046 ocfs2: Change the... |
2223 |
ocfs2_wait_for_recovery(osb); |
ccd979bdb [PATCH] OCFS2: Th... |
2224 |
|
e63aecb65 ocfs2: Rename ocf... |
2225 |
lockres = &OCFS2_I(inode)->ip_inode_lockres; |
bd3e76105 ocfs2: Use global... |
2226 |
level = ex ? DLM_LOCK_EX : DLM_LOCK_PR; |
ccd979bdb [PATCH] OCFS2: Th... |
2227 2228 |
dlm_flags = 0; if (arg_flags & OCFS2_META_LOCK_NOQUEUE) |
bd3e76105 ocfs2: Use global... |
2229 |
dlm_flags |= DLM_LKF_NOQUEUE; |
ccd979bdb [PATCH] OCFS2: Th... |
2230 |
|
cb25797d4 ocfs2: Add lockde... |
2231 2232 |
status = __ocfs2_cluster_lock(osb, lockres, level, dlm_flags, arg_flags, subclass, _RET_IP_); |
ccd979bdb [PATCH] OCFS2: Th... |
2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 |
if (status < 0) { if (status != -EAGAIN && status != -EIOCBRETRY) mlog_errno(status); goto bail; } /* Notify the error cleanup path to drop the cluster lock. */ acquired = 1; /* We wait twice because a node may have died while we were in * the lower dlm layers. The second time though, we've * committed to owning this lock so we don't allow signals to * abort the operation. */ if (!(arg_flags & OCFS2_META_LOCK_RECOVERY)) |
553abd046 ocfs2: Change the... |
2247 |
ocfs2_wait_for_recovery(osb); |
ccd979bdb [PATCH] OCFS2: Th... |
2248 |
|
c271c5c22 ocfs2: local mounts |
2249 |
local: |
24c19ef40 ocfs2: Remove i_g... |
2250 2251 2252 2253 2254 2255 2256 2257 |
/* * We only see this flag if we're being called from * ocfs2_read_locked_inode(). It means we're locking an inode * which hasn't been populated yet, so clear the refresh flag * and let the caller handle it. */ if (inode->i_state & I_NEW) { status = 0; |
c271c5c22 ocfs2: local mounts |
2258 2259 |
if (lockres) ocfs2_complete_lock_res_refresh(lockres, 0); |
24c19ef40 ocfs2: Remove i_g... |
2260 2261 |
goto bail; } |
ccd979bdb [PATCH] OCFS2: Th... |
2262 |
/* This is fun. The caller may want a bh back, or it may |
e63aecb65 ocfs2: Rename ocf... |
2263 |
* not. ocfs2_inode_lock_update definitely wants one in, but |
ccd979bdb [PATCH] OCFS2: Th... |
2264 2265 2266 |
* may or may not read one, depending on what's in the * LVB. The result of all of this is that we've *only* gone to * disk if we have to, so the complexity is worthwhile. */ |
e63aecb65 ocfs2: Rename ocf... |
2267 |
status = ocfs2_inode_lock_update(inode, &local_bh); |
ccd979bdb [PATCH] OCFS2: Th... |
2268 2269 2270 2271 2272 |
if (status < 0) { if (status != -ENOENT) mlog_errno(status); goto bail; } |
03efed8a2 ocfs2: Bugfix for... |
2273 |
getbh: |
ccd979bdb [PATCH] OCFS2: Th... |
2274 2275 2276 2277 2278 2279 2280 |
if (ret_bh) { status = ocfs2_assign_bh(inode, ret_bh, local_bh); if (status < 0) { mlog_errno(status); goto bail; } } |
ccd979bdb [PATCH] OCFS2: Th... |
2281 2282 2283 2284 2285 2286 2287 |
bail: if (status < 0) { if (ret_bh && (*ret_bh)) { brelse(*ret_bh); *ret_bh = NULL; } if (acquired) |
e63aecb65 ocfs2: Rename ocf... |
2288 |
ocfs2_inode_unlock(inode, ex); |
ccd979bdb [PATCH] OCFS2: Th... |
2289 2290 2291 2292 |
} if (local_bh) brelse(local_bh); |
ccd979bdb [PATCH] OCFS2: Th... |
2293 2294 2295 2296 |
return status; } /* |
34d024f84 ocfs2: Remove mou... |
2297 2298 2299 |
* This is working around a lock inversion between tasks acquiring DLM * locks while holding a page lock and the downconvert thread which * blocks dlm lock acquiry while acquiring page locks. |
ccd979bdb [PATCH] OCFS2: Th... |
2300 2301 2302 2303 2304 |
* * ** These _with_page variantes are only intended to be called from aop * methods that hold page locks and return a very specific *positive* error * code that aop methods pass up to the VFS -- test for errors with != 0. ** * |
34d024f84 ocfs2: Remove mou... |
2305 2306 2307 2308 2309 2310 |
* The DLM is called such that it returns -EAGAIN if it would have * blocked waiting for the downconvert thread. In that case we unlock * our page so the downconvert thread can make progress. Once we've * done this we have to return AOP_TRUNCATED_PAGE so the aop method * that called us can bubble that back up into the VFS who will then * immediately retry the aop call. |
ccd979bdb [PATCH] OCFS2: Th... |
2311 2312 2313 2314 2315 2316 2317 |
* * We do a blocking lock and immediate unlock before returning, though, so that * the lock has a great chance of being cached on this node by the time the VFS * calls back to retry the aop. This has a potential to livelock as nodes * ping locks back and forth, but that's a risk we're willing to take to avoid * the lock inversion simply. */ |
e63aecb65 ocfs2: Rename ocf... |
2318 |
int ocfs2_inode_lock_with_page(struct inode *inode, |
ccd979bdb [PATCH] OCFS2: Th... |
2319 2320 2321 2322 2323 |
struct buffer_head **ret_bh, int ex, struct page *page) { int ret; |
e63aecb65 ocfs2: Rename ocf... |
2324 |
ret = ocfs2_inode_lock_full(inode, ret_bh, ex, OCFS2_LOCK_NONBLOCK); |
ccd979bdb [PATCH] OCFS2: Th... |
2325 2326 |
if (ret == -EAGAIN) { unlock_page(page); |
e63aecb65 ocfs2: Rename ocf... |
2327 2328 |
if (ocfs2_inode_lock(inode, ret_bh, ex) == 0) ocfs2_inode_unlock(inode, ex); |
ccd979bdb [PATCH] OCFS2: Th... |
2329 2330 2331 2332 2333 |
ret = AOP_TRUNCATED_PAGE; } return ret; } |
e63aecb65 ocfs2: Rename ocf... |
2334 |
int ocfs2_inode_lock_atime(struct inode *inode, |
7f1a37e31 ocfs2: core atime... |
2335 2336 2337 2338 |
struct vfsmount *vfsmnt, int *level) { int ret; |
e63aecb65 ocfs2: Rename ocf... |
2339 |
ret = ocfs2_inode_lock(inode, NULL, 0); |
7f1a37e31 ocfs2: core atime... |
2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 |
if (ret < 0) { mlog_errno(ret); return ret; } /* * If we should update atime, we will get EX lock, * otherwise we just get PR lock. */ if (ocfs2_should_update_atime(inode, vfsmnt)) { struct buffer_head *bh = NULL; |
e63aecb65 ocfs2: Rename ocf... |
2351 2352 |
ocfs2_inode_unlock(inode, 0); ret = ocfs2_inode_lock(inode, &bh, 1); |
7f1a37e31 ocfs2: core atime... |
2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 |
if (ret < 0) { mlog_errno(ret); return ret; } *level = 1; if (ocfs2_should_update_atime(inode, vfsmnt)) ocfs2_update_inode_atime(inode, bh); if (bh) brelse(bh); } else *level = 0; |
7f1a37e31 ocfs2: core atime... |
2364 2365 |
return ret; } |
e63aecb65 ocfs2: Rename ocf... |
2366 |
void ocfs2_inode_unlock(struct inode *inode, |
ccd979bdb [PATCH] OCFS2: Th... |
2367 2368 |
int ex) { |
bd3e76105 ocfs2: Use global... |
2369 |
int level = ex ? DLM_LOCK_EX : DLM_LOCK_PR; |
e63aecb65 ocfs2: Rename ocf... |
2370 |
struct ocfs2_lock_res *lockres = &OCFS2_I(inode)->ip_inode_lockres; |
c271c5c22 ocfs2: local mounts |
2371 |
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
ccd979bdb [PATCH] OCFS2: Th... |
2372 |
|
b0697053f ocfs2: don't use ... |
2373 2374 2375 |
mlog(0, "inode %llu drop %s META lock ", (unsigned long long)OCFS2_I(inode)->ip_blkno, |
ccd979bdb [PATCH] OCFS2: Th... |
2376 |
ex ? "EXMODE" : "PRMODE"); |
c271c5c22 ocfs2: local mounts |
2377 2378 |
if (!ocfs2_is_hard_readonly(OCFS2_SB(inode->i_sb)) && !ocfs2_mount_local(osb)) |
ccd979bdb [PATCH] OCFS2: Th... |
2379 |
ocfs2_cluster_unlock(OCFS2_SB(inode->i_sb), lockres, level); |
ccd979bdb [PATCH] OCFS2: Th... |
2380 |
} |
df152c241 ocfs2: Disable or... |
2381 |
int ocfs2_orphan_scan_lock(struct ocfs2_super *osb, u32 *seqno) |
83273932f ocfs2: timer to q... |
2382 2383 2384 |
{ struct ocfs2_lock_res *lockres; struct ocfs2_orphan_scan_lvb *lvb; |
83273932f ocfs2: timer to q... |
2385 |
int status = 0; |
df152c241 ocfs2: Disable or... |
2386 2387 2388 2389 2390 |
if (ocfs2_is_hard_readonly(osb)) return -EROFS; if (ocfs2_mount_local(osb)) return 0; |
83273932f ocfs2: timer to q... |
2391 |
lockres = &osb->osb_orphan_scan.os_lockres; |
df152c241 ocfs2: Disable or... |
2392 |
status = ocfs2_cluster_lock(osb, lockres, DLM_LOCK_EX, 0, 0); |
83273932f ocfs2: timer to q... |
2393 2394 2395 2396 |
if (status < 0) return status; lvb = ocfs2_dlm_lvb(&lockres->l_lksb); |
1c520dfbf ocfs2: Provide th... |
2397 2398 |
if (ocfs2_dlm_lvb_valid(&lockres->l_lksb) && lvb->lvb_version == OCFS2_ORPHAN_LVB_VERSION) |
83273932f ocfs2: timer to q... |
2399 |
*seqno = be32_to_cpu(lvb->lvb_os_seqno); |
3211949f8 ocfs2: Do not ini... |
2400 2401 |
else *seqno = osb->osb_orphan_scan.os_seqno + 1; |
83273932f ocfs2: timer to q... |
2402 2403 |
return status; } |
df152c241 ocfs2: Disable or... |
2404 |
void ocfs2_orphan_scan_unlock(struct ocfs2_super *osb, u32 seqno) |
83273932f ocfs2: timer to q... |
2405 2406 2407 |
{ struct ocfs2_lock_res *lockres; struct ocfs2_orphan_scan_lvb *lvb; |
83273932f ocfs2: timer to q... |
2408 |
|
df152c241 ocfs2: Disable or... |
2409 2410 2411 2412 2413 2414 2415 |
if (!ocfs2_is_hard_readonly(osb) && !ocfs2_mount_local(osb)) { lockres = &osb->osb_orphan_scan.os_lockres; lvb = ocfs2_dlm_lvb(&lockres->l_lksb); lvb->lvb_version = OCFS2_ORPHAN_LVB_VERSION; lvb->lvb_os_seqno = cpu_to_be32(seqno); ocfs2_cluster_unlock(osb, lockres, DLM_LOCK_EX); } |
83273932f ocfs2: timer to q... |
2416 |
} |
ccd979bdb [PATCH] OCFS2: Th... |
2417 2418 2419 |
int ocfs2_super_lock(struct ocfs2_super *osb, int ex) { |
c271c5c22 ocfs2: local mounts |
2420 |
int status = 0; |
bd3e76105 ocfs2: Use global... |
2421 |
int level = ex ? DLM_LOCK_EX : DLM_LOCK_PR; |
ccd979bdb [PATCH] OCFS2: Th... |
2422 |
struct ocfs2_lock_res *lockres = &osb->osb_super_lockres; |
ccd979bdb [PATCH] OCFS2: Th... |
2423 |
|
ccd979bdb [PATCH] OCFS2: Th... |
2424 2425 |
if (ocfs2_is_hard_readonly(osb)) return -EROFS; |
c271c5c22 ocfs2: local mounts |
2426 2427 |
if (ocfs2_mount_local(osb)) goto bail; |
ccd979bdb [PATCH] OCFS2: Th... |
2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 |
status = ocfs2_cluster_lock(osb, lockres, level, 0, 0); if (status < 0) { mlog_errno(status); goto bail; } /* The super block lock path is really in the best position to * know when resources covered by the lock need to be * refreshed, so we do it here. Of course, making sense of * everything is up to the caller :) */ status = ocfs2_should_refresh_lock_res(lockres); if (status < 0) { mlog_errno(status); goto bail; } if (status) { |
8e8a4603b ocfs2: Move slot ... |
2444 |
status = ocfs2_refresh_slot_info(osb); |
ccd979bdb [PATCH] OCFS2: Th... |
2445 2446 2447 2448 2449 |
ocfs2_complete_lock_res_refresh(lockres, status); if (status < 0) mlog_errno(status); |
8ddb7b004 [PATCH 2/2] ocfs2... |
2450 |
ocfs2_track_lock_refresh(lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
2451 2452 |
} bail: |
ccd979bdb [PATCH] OCFS2: Th... |
2453 2454 2455 2456 2457 2458 |
return status; } void ocfs2_super_unlock(struct ocfs2_super *osb, int ex) { |
bd3e76105 ocfs2: Use global... |
2459 |
int level = ex ? DLM_LOCK_EX : DLM_LOCK_PR; |
ccd979bdb [PATCH] OCFS2: Th... |
2460 |
struct ocfs2_lock_res *lockres = &osb->osb_super_lockres; |
c271c5c22 ocfs2: local mounts |
2461 2462 |
if (!ocfs2_mount_local(osb)) ocfs2_cluster_unlock(osb, lockres, level); |
ccd979bdb [PATCH] OCFS2: Th... |
2463 2464 2465 2466 2467 2468 2469 2470 2471 |
} int ocfs2_rename_lock(struct ocfs2_super *osb) { int status; struct ocfs2_lock_res *lockres = &osb->osb_rename_lockres; if (ocfs2_is_hard_readonly(osb)) return -EROFS; |
c271c5c22 ocfs2: local mounts |
2472 2473 |
if (ocfs2_mount_local(osb)) return 0; |
bd3e76105 ocfs2: Use global... |
2474 |
status = ocfs2_cluster_lock(osb, lockres, DLM_LOCK_EX, 0, 0); |
ccd979bdb [PATCH] OCFS2: Th... |
2475 2476 2477 2478 2479 2480 2481 2482 2483 |
if (status < 0) mlog_errno(status); return status; } void ocfs2_rename_unlock(struct ocfs2_super *osb) { struct ocfs2_lock_res *lockres = &osb->osb_rename_lockres; |
c271c5c22 ocfs2: local mounts |
2484 |
if (!ocfs2_mount_local(osb)) |
bd3e76105 ocfs2: Use global... |
2485 |
ocfs2_cluster_unlock(osb, lockres, DLM_LOCK_EX); |
ccd979bdb [PATCH] OCFS2: Th... |
2486 |
} |
6ca497a83 ocfs2: fix rare s... |
2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 |
int ocfs2_nfs_sync_lock(struct ocfs2_super *osb, int ex) { int status; struct ocfs2_lock_res *lockres = &osb->osb_nfs_sync_lockres; if (ocfs2_is_hard_readonly(osb)) return -EROFS; if (ocfs2_mount_local(osb)) return 0; status = ocfs2_cluster_lock(osb, lockres, ex ? LKM_EXMODE : LKM_PRMODE, 0, 0); if (status < 0) mlog(ML_ERROR, "lock on nfs sync lock failed %d ", status); return status; } void ocfs2_nfs_sync_unlock(struct ocfs2_super *osb, int ex) { struct ocfs2_lock_res *lockres = &osb->osb_nfs_sync_lockres; if (!ocfs2_mount_local(osb)) ocfs2_cluster_unlock(osb, lockres, ex ? LKM_EXMODE : LKM_PRMODE); } |
d680efe9d ocfs2: Add new cl... |
2515 2516 2517 |
int ocfs2_dentry_lock(struct dentry *dentry, int ex) { int ret; |
bd3e76105 ocfs2: Use global... |
2518 |
int level = ex ? DLM_LOCK_EX : DLM_LOCK_PR; |
d680efe9d ocfs2: Add new cl... |
2519 2520 2521 2522 |
struct ocfs2_dentry_lock *dl = dentry->d_fsdata; struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); BUG_ON(!dl); |
03efed8a2 ocfs2: Bugfix for... |
2523 2524 2525 2526 2527 |
if (ocfs2_is_hard_readonly(osb)) { if (ex) return -EROFS; return 0; } |
d680efe9d ocfs2: Add new cl... |
2528 |
|
c271c5c22 ocfs2: local mounts |
2529 2530 |
if (ocfs2_mount_local(osb)) return 0; |
d680efe9d ocfs2: Add new cl... |
2531 2532 2533 2534 2535 2536 2537 2538 2539 |
ret = ocfs2_cluster_lock(osb, &dl->dl_lockres, level, 0, 0); if (ret < 0) mlog_errno(ret); return ret; } void ocfs2_dentry_unlock(struct dentry *dentry, int ex) { |
bd3e76105 ocfs2: Use global... |
2540 |
int level = ex ? DLM_LOCK_EX : DLM_LOCK_PR; |
d680efe9d ocfs2: Add new cl... |
2541 2542 |
struct ocfs2_dentry_lock *dl = dentry->d_fsdata; struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); |
03efed8a2 ocfs2: Bugfix for... |
2543 |
if (!ocfs2_is_hard_readonly(osb) && !ocfs2_mount_local(osb)) |
c271c5c22 ocfs2: local mounts |
2544 |
ocfs2_cluster_unlock(osb, &dl->dl_lockres, level); |
d680efe9d ocfs2: Add new cl... |
2545 |
} |
ccd979bdb [PATCH] OCFS2: Th... |
2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 |
/* Reference counting of the dlm debug structure. We want this because * open references on the debug inodes can live on after a mount, so * we can't rely on the ocfs2_super to always exist. */ static void ocfs2_dlm_debug_free(struct kref *kref) { struct ocfs2_dlm_debug *dlm_debug; dlm_debug = container_of(kref, struct ocfs2_dlm_debug, d_refcnt); kfree(dlm_debug); } void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug) { if (dlm_debug) kref_put(&dlm_debug->d_refcnt, ocfs2_dlm_debug_free); } static void ocfs2_get_dlm_debug(struct ocfs2_dlm_debug *debug) { kref_get(&debug->d_refcnt); } struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void) { struct ocfs2_dlm_debug *dlm_debug; dlm_debug = kmalloc(sizeof(struct ocfs2_dlm_debug), GFP_KERNEL); if (!dlm_debug) { mlog_errno(-ENOMEM); goto out; } kref_init(&dlm_debug->d_refcnt); INIT_LIST_HEAD(&dlm_debug->d_lockres_tracking); dlm_debug->d_locking_state = NULL; out: return dlm_debug; } /* Access to this is arbitrated for us via seq_file->sem. */ struct ocfs2_dlm_seq_priv { struct ocfs2_dlm_debug *p_dlm_debug; struct ocfs2_lock_res p_iter_res; struct ocfs2_lock_res p_tmp_res; }; static struct ocfs2_lock_res *ocfs2_dlm_next_res(struct ocfs2_lock_res *start, struct ocfs2_dlm_seq_priv *priv) { struct ocfs2_lock_res *iter, *ret = NULL; struct ocfs2_dlm_debug *dlm_debug = priv->p_dlm_debug; assert_spin_locked(&ocfs2_dlm_tracking_lock); list_for_each_entry(iter, &start->l_debug_list, l_debug_list) { /* discover the head of the list */ if (&iter->l_debug_list == &dlm_debug->d_lockres_tracking) { mlog(0, "End of list found, %p ", ret); break; } /* We track our "dummy" iteration lockres' by a NULL * l_ops field. */ if (iter->l_ops != NULL) { ret = iter; break; } } return ret; } static void *ocfs2_dlm_seq_start(struct seq_file *m, loff_t *pos) { struct ocfs2_dlm_seq_priv *priv = m->private; struct ocfs2_lock_res *iter; spin_lock(&ocfs2_dlm_tracking_lock); iter = ocfs2_dlm_next_res(&priv->p_iter_res, priv); if (iter) { /* Since lockres' have the lifetime of their container * (which can be inodes, ocfs2_supers, etc) we want to * copy this out to a temporary lockres while still * under the spinlock. Obviously after this we can't * trust any pointers on the copy returned, but that's * ok as the information we want isn't typically held * in them. */ priv->p_tmp_res = *iter; iter = &priv->p_tmp_res; } spin_unlock(&ocfs2_dlm_tracking_lock); return iter; } static void ocfs2_dlm_seq_stop(struct seq_file *m, void *v) { } static void *ocfs2_dlm_seq_next(struct seq_file *m, void *v, loff_t *pos) { struct ocfs2_dlm_seq_priv *priv = m->private; struct ocfs2_lock_res *iter = v; struct ocfs2_lock_res *dummy = &priv->p_iter_res; spin_lock(&ocfs2_dlm_tracking_lock); iter = ocfs2_dlm_next_res(iter, priv); list_del_init(&dummy->l_debug_list); if (iter) { list_add(&dummy->l_debug_list, &iter->l_debug_list); priv->p_tmp_res = *iter; iter = &priv->p_tmp_res; } spin_unlock(&ocfs2_dlm_tracking_lock); return iter; } |
5bc970e80 ocfs2: Use hrtime... |
2665 2666 2667 2668 2669 2670 2671 2672 2673 |
/* * Version is used by debugfs.ocfs2 to determine the format being used * * New in version 2 * - Lock stats printed * New in version 3 * - Max time in lock stats is in usecs (instead of nsecs) */ #define OCFS2_DLM_DEBUG_STR_VERSION 3 |
ccd979bdb [PATCH] OCFS2: Th... |
2674 2675 2676 2677 2678 2679 2680 2681 |
static int ocfs2_dlm_seq_show(struct seq_file *m, void *v) { int i; char *lvb; struct ocfs2_lock_res *lockres = v; if (!lockres) return -EINVAL; |
d680efe9d ocfs2: Add new cl... |
2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 |
seq_printf(m, "0x%x\t", OCFS2_DLM_DEBUG_STR_VERSION); if (lockres->l_type == OCFS2_LOCK_TYPE_DENTRY) seq_printf(m, "%.*s%08x\t", OCFS2_DENTRY_LOCK_INO_START - 1, lockres->l_name, (unsigned int)ocfs2_get_dentry_lock_ino(lockres)); else seq_printf(m, "%.*s\t", OCFS2_LOCK_ID_MAX_LEN, lockres->l_name); seq_printf(m, "%d\t" |
ccd979bdb [PATCH] OCFS2: Th... |
2692 2693 2694 2695 2696 2697 2698 |
"0x%lx\t" "0x%x\t" "0x%x\t" "%u\t" "%u\t" "%d\t" "%d\t", |
ccd979bdb [PATCH] OCFS2: Th... |
2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 |
lockres->l_level, lockres->l_flags, lockres->l_action, lockres->l_unlock_action, lockres->l_ro_holders, lockres->l_ex_holders, lockres->l_requested, lockres->l_blocking); /* Dump the raw LVB */ |
8f2c9c1b1 ocfs2: Create the... |
2709 |
lvb = ocfs2_dlm_lvb(&lockres->l_lksb); |
ccd979bdb [PATCH] OCFS2: Th... |
2710 2711 |
for(i = 0; i < DLM_LVB_LEN; i++) seq_printf(m, "0x%x\t", lvb[i]); |
8ddb7b004 [PATCH 2/2] ocfs2... |
2712 |
#ifdef CONFIG_OCFS2_FS_STATS |
5bc970e80 ocfs2: Use hrtime... |
2713 2714 2715 2716 2717 2718 2719 2720 2721 |
# define lock_num_prmode(_l) ((_l)->l_lock_prmode.ls_gets) # define lock_num_exmode(_l) ((_l)->l_lock_exmode.ls_gets) # define lock_num_prmode_failed(_l) ((_l)->l_lock_prmode.ls_fail) # define lock_num_exmode_failed(_l) ((_l)->l_lock_exmode.ls_fail) # define lock_total_prmode(_l) ((_l)->l_lock_prmode.ls_total) # define lock_total_exmode(_l) ((_l)->l_lock_exmode.ls_total) # define lock_max_prmode(_l) ((_l)->l_lock_prmode.ls_max) # define lock_max_exmode(_l) ((_l)->l_lock_exmode.ls_max) # define lock_refresh(_l) ((_l)->l_lock_refresh) |
8ddb7b004 [PATCH 2/2] ocfs2... |
2722 |
#else |
5bc970e80 ocfs2: Use hrtime... |
2723 2724 |
# define lock_num_prmode(_l) (0) # define lock_num_exmode(_l) (0) |
8ddb7b004 [PATCH 2/2] ocfs2... |
2725 2726 |
# define lock_num_prmode_failed(_l) (0) # define lock_num_exmode_failed(_l) (0) |
dd25e55ea ocfs2: fix printk... |
2727 2728 |
# define lock_total_prmode(_l) (0ULL) # define lock_total_exmode(_l) (0ULL) |
8ddb7b004 [PATCH 2/2] ocfs2... |
2729 2730 2731 2732 2733 |
# define lock_max_prmode(_l) (0) # define lock_max_exmode(_l) (0) # define lock_refresh(_l) (0) #endif /* The following seq_print was added in version 2 of this output */ |
5bc970e80 ocfs2: Use hrtime... |
2734 2735 |
seq_printf(m, "%u\t" "%u\t" |
8ddb7b004 [PATCH 2/2] ocfs2... |
2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 |
"%u\t" "%u\t" "%llu\t" "%llu\t" "%u\t" "%u\t" "%u\t", lock_num_prmode(lockres), lock_num_exmode(lockres), lock_num_prmode_failed(lockres), lock_num_exmode_failed(lockres), lock_total_prmode(lockres), lock_total_exmode(lockres), lock_max_prmode(lockres), lock_max_exmode(lockres), lock_refresh(lockres)); |
ccd979bdb [PATCH] OCFS2: Th... |
2752 2753 2754 2755 2756 |
/* End the line */ seq_printf(m, " "); return 0; } |
90d99779a [PATCH] [OCFS2]: ... |
2757 |
static const struct seq_operations ocfs2_dlm_seq_ops = { |
ccd979bdb [PATCH] OCFS2: Th... |
2758 2759 2760 2761 2762 2763 2764 2765 |
.start = ocfs2_dlm_seq_start, .stop = ocfs2_dlm_seq_stop, .next = ocfs2_dlm_seq_next, .show = ocfs2_dlm_seq_show, }; static int ocfs2_dlm_debug_release(struct inode *inode, struct file *file) { |
33fa1d909 fs/ocfs2: Remove ... |
2766 |
struct seq_file *seq = file->private_data; |
ccd979bdb [PATCH] OCFS2: Th... |
2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 |
struct ocfs2_dlm_seq_priv *priv = seq->private; struct ocfs2_lock_res *res = &priv->p_iter_res; ocfs2_remove_lockres_tracking(res); ocfs2_put_dlm_debug(priv->p_dlm_debug); return seq_release_private(inode, file); } static int ocfs2_dlm_debug_open(struct inode *inode, struct file *file) { int ret; struct ocfs2_dlm_seq_priv *priv; struct seq_file *seq; struct ocfs2_super *osb; priv = kzalloc(sizeof(struct ocfs2_dlm_seq_priv), GFP_KERNEL); if (!priv) { ret = -ENOMEM; mlog_errno(ret); goto out; } |
8e18e2941 [PATCH] inode_die... |
2788 |
osb = inode->i_private; |
ccd979bdb [PATCH] OCFS2: Th... |
2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 |
ocfs2_get_dlm_debug(osb->osb_dlm_debug); priv->p_dlm_debug = osb->osb_dlm_debug; INIT_LIST_HEAD(&priv->p_iter_res.l_debug_list); ret = seq_open(file, &ocfs2_dlm_seq_ops); if (ret) { kfree(priv); mlog_errno(ret); goto out; } |
33fa1d909 fs/ocfs2: Remove ... |
2799 |
seq = file->private_data; |
ccd979bdb [PATCH] OCFS2: Th... |
2800 2801 2802 2803 2804 2805 2806 2807 |
seq->private = priv; ocfs2_add_lockres_tracking(&priv->p_iter_res, priv->p_dlm_debug); out: return ret; } |
4b6f5d20b [PATCH] Make most... |
2808 |
static const struct file_operations ocfs2_dlm_debug_fops = { |
ccd979bdb [PATCH] OCFS2: Th... |
2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 |
.open = ocfs2_dlm_debug_open, .release = ocfs2_dlm_debug_release, .read = seq_read, .llseek = seq_lseek, }; static int ocfs2_dlm_init_debug(struct ocfs2_super *osb) { int ret = 0; struct ocfs2_dlm_debug *dlm_debug = osb->osb_dlm_debug; dlm_debug->d_locking_state = debugfs_create_file("locking_state", S_IFREG|S_IRUSR, osb->osb_debug_root, osb, &ocfs2_dlm_debug_fops); if (!dlm_debug->d_locking_state) { ret = -EINVAL; mlog(ML_ERROR, "Unable to create locking state debugfs file. "); goto out; } ocfs2_get_dlm_debug(dlm_debug); out: return ret; } static void ocfs2_dlm_shutdown_debug(struct ocfs2_super *osb) { struct ocfs2_dlm_debug *dlm_debug = osb->osb_dlm_debug; if (dlm_debug) { debugfs_remove(dlm_debug->d_locking_state); ocfs2_put_dlm_debug(dlm_debug); } } int ocfs2_dlm_init(struct ocfs2_super *osb) { |
c271c5c22 ocfs2: local mounts |
2850 |
int status = 0; |
4670c46de ocfs2: Introduce ... |
2851 |
struct ocfs2_cluster_connection *conn = NULL; |
ccd979bdb [PATCH] OCFS2: Th... |
2852 |
|
0abd6d180 ocfs2: Fill node ... |
2853 2854 |
if (ocfs2_mount_local(osb)) { osb->node_num = 0; |
c271c5c22 ocfs2: local mounts |
2855 |
goto local; |
0abd6d180 ocfs2: Fill node ... |
2856 |
} |
c271c5c22 ocfs2: local mounts |
2857 |
|
ccd979bdb [PATCH] OCFS2: Th... |
2858 2859 2860 2861 2862 |
status = ocfs2_dlm_init_debug(osb); if (status < 0) { mlog_errno(status); goto bail; } |
34d024f84 ocfs2: Remove mou... |
2863 2864 2865 2866 2867 |
/* launch downconvert thread */ osb->dc_task = kthread_run(ocfs2_downconvert_thread, osb, "ocfs2dc"); if (IS_ERR(osb->dc_task)) { status = PTR_ERR(osb->dc_task); osb->dc_task = NULL; |
ccd979bdb [PATCH] OCFS2: Th... |
2868 2869 2870 |
mlog_errno(status); goto bail; } |
ccd979bdb [PATCH] OCFS2: Th... |
2871 |
/* for now, uuid == domain */ |
9c6c877c0 ocfs2: Add the 'c... |
2872 2873 |
status = ocfs2_cluster_connect(osb->osb_cluster_stack, osb->uuid_str, |
4670c46de ocfs2: Introduce ... |
2874 |
strlen(osb->uuid_str), |
553b5eb91 ocfs2: Pass the l... |
2875 |
&lproto, ocfs2_do_node_down, osb, |
4670c46de ocfs2: Introduce ... |
2876 2877 |
&conn); if (status) { |
ccd979bdb [PATCH] OCFS2: Th... |
2878 2879 2880 |
mlog_errno(status); goto bail; } |
0abd6d180 ocfs2: Fill node ... |
2881 2882 2883 2884 2885 2886 |
status = ocfs2_cluster_this_node(&osb->node_num); if (status < 0) { mlog_errno(status); mlog(ML_ERROR, "could not find this host's node number "); |
286eaa95c ocfs2: Break out ... |
2887 |
ocfs2_cluster_disconnect(conn, 0); |
0abd6d180 ocfs2: Fill node ... |
2888 2889 |
goto bail; } |
c271c5c22 ocfs2: local mounts |
2890 |
local: |
ccd979bdb [PATCH] OCFS2: Th... |
2891 2892 |
ocfs2_super_lock_res_init(&osb->osb_super_lockres, osb); ocfs2_rename_lock_res_init(&osb->osb_rename_lockres, osb); |
6ca497a83 ocfs2: fix rare s... |
2893 |
ocfs2_nfs_sync_lock_res_init(&osb->osb_nfs_sync_lockres, osb); |
83273932f ocfs2: timer to q... |
2894 |
ocfs2_orphan_scan_lock_res_init(&osb->osb_orphan_scan.os_lockres, osb); |
ccd979bdb [PATCH] OCFS2: Th... |
2895 |
|
4670c46de ocfs2: Introduce ... |
2896 |
osb->cconn = conn; |
ccd979bdb [PATCH] OCFS2: Th... |
2897 2898 2899 2900 2901 |
status = 0; bail: if (status < 0) { ocfs2_dlm_shutdown_debug(osb); |
34d024f84 ocfs2: Remove mou... |
2902 2903 |
if (osb->dc_task) kthread_stop(osb->dc_task); |
ccd979bdb [PATCH] OCFS2: Th... |
2904 |
} |
ccd979bdb [PATCH] OCFS2: Th... |
2905 2906 |
return status; } |
286eaa95c ocfs2: Break out ... |
2907 2908 |
void ocfs2_dlm_shutdown(struct ocfs2_super *osb, int hangup_pending) |
ccd979bdb [PATCH] OCFS2: Th... |
2909 |
{ |
ccd979bdb [PATCH] OCFS2: Th... |
2910 |
ocfs2_drop_osb_locks(osb); |
4670c46de ocfs2: Introduce ... |
2911 2912 2913 2914 2915 |
/* * Now that we have dropped all locks and ocfs2_dismount_volume() * has disabled recovery, the DLM won't be talking to us. It's * safe to tear things down before disconnecting the cluster. */ |
34d024f84 ocfs2: Remove mou... |
2916 2917 2918 |
if (osb->dc_task) { kthread_stop(osb->dc_task); osb->dc_task = NULL; |
ccd979bdb [PATCH] OCFS2: Th... |
2919 2920 2921 2922 |
} ocfs2_lock_res_free(&osb->osb_super_lockres); ocfs2_lock_res_free(&osb->osb_rename_lockres); |
6ca497a83 ocfs2: fix rare s... |
2923 |
ocfs2_lock_res_free(&osb->osb_nfs_sync_lockres); |
83273932f ocfs2: timer to q... |
2924 |
ocfs2_lock_res_free(&osb->osb_orphan_scan.os_lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
2925 |
|
286eaa95c ocfs2: Break out ... |
2926 |
ocfs2_cluster_disconnect(osb->cconn, hangup_pending); |
4670c46de ocfs2: Introduce ... |
2927 |
osb->cconn = NULL; |
ccd979bdb [PATCH] OCFS2: Th... |
2928 2929 |
ocfs2_dlm_shutdown_debug(osb); |
ccd979bdb [PATCH] OCFS2: Th... |
2930 |
} |
ccd979bdb [PATCH] OCFS2: Th... |
2931 |
static int ocfs2_drop_lock(struct ocfs2_super *osb, |
0d5dc6c2d ocfs2: Teach ocfs... |
2932 |
struct ocfs2_lock_res *lockres) |
ccd979bdb [PATCH] OCFS2: Th... |
2933 |
{ |
7431cd7e8 ocfs2: Use -errno... |
2934 |
int ret; |
ccd979bdb [PATCH] OCFS2: Th... |
2935 |
unsigned long flags; |
bd3e76105 ocfs2: Use global... |
2936 |
u32 lkm_flags = 0; |
ccd979bdb [PATCH] OCFS2: Th... |
2937 2938 2939 2940 |
/* We didn't get anywhere near actually using this lockres. */ if (!(lockres->l_flags & OCFS2_LOCK_INITIALIZED)) goto out; |
b80fc012e ocfs2: don't unco... |
2941 |
if (lockres->l_ops->flags & LOCK_TYPE_USES_LVB) |
bd3e76105 ocfs2: Use global... |
2942 |
lkm_flags |= DLM_LKF_VALBLK; |
b80fc012e ocfs2: don't unco... |
2943 |
|
ccd979bdb [PATCH] OCFS2: Th... |
2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 |
spin_lock_irqsave(&lockres->l_lock, flags); mlog_bug_on_msg(!(lockres->l_flags & OCFS2_LOCK_FREEING), "lockres %s, flags 0x%lx ", lockres->l_name, lockres->l_flags); while (lockres->l_flags & OCFS2_LOCK_BUSY) { mlog(0, "waiting on busy lock \"%s\": flags = %lx, action = " "%u, unlock_action = %u ", lockres->l_name, lockres->l_flags, lockres->l_action, lockres->l_unlock_action); spin_unlock_irqrestore(&lockres->l_lock, flags); /* XXX: Today we just wait on any busy * locks... Perhaps we need to cancel converts in the * future? */ ocfs2_wait_on_busy_lock(lockres); spin_lock_irqsave(&lockres->l_lock, flags); } |
0d5dc6c2d ocfs2: Teach ocfs... |
2967 2968 |
if (lockres->l_ops->flags & LOCK_TYPE_USES_LVB) { if (lockres->l_flags & OCFS2_LOCK_ATTACHED && |
bd3e76105 ocfs2: Use global... |
2969 |
lockres->l_level == DLM_LOCK_EX && |
0d5dc6c2d ocfs2: Teach ocfs... |
2970 2971 2972 |
!(lockres->l_flags & OCFS2_LOCK_NEEDS_REFRESH)) lockres->l_ops->set_lvb(lockres); } |
ccd979bdb [PATCH] OCFS2: Th... |
2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 |
if (lockres->l_flags & OCFS2_LOCK_BUSY) mlog(ML_ERROR, "destroying busy lock: \"%s\" ", lockres->l_name); if (lockres->l_flags & OCFS2_LOCK_BLOCKED) mlog(0, "destroying blocked lock: \"%s\" ", lockres->l_name); if (!(lockres->l_flags & OCFS2_LOCK_ATTACHED)) { spin_unlock_irqrestore(&lockres->l_lock, flags); goto out; } lockres_clear_flags(lockres, OCFS2_LOCK_ATTACHED); /* make sure we never get here while waiting for an ast to * fire. */ BUG_ON(lockres->l_action != OCFS2_AST_INVALID); /* is this necessary? */ lockres_or_flags(lockres, OCFS2_LOCK_BUSY); lockres->l_unlock_action = OCFS2_UNLOCK_DROP_LOCK; spin_unlock_irqrestore(&lockres->l_lock, flags); mlog(0, "lock %s ", lockres->l_name); |
a796d2862 ocfs2: Pass lksbs... |
3000 |
ret = ocfs2_dlm_unlock(osb->cconn, &lockres->l_lksb, lkm_flags); |
7431cd7e8 ocfs2: Use -errno... |
3001 3002 |
if (ret) { ocfs2_log_dlm_error("ocfs2_dlm_unlock", ret, lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
3003 3004 |
mlog(ML_ERROR, "lockres flags: %lu ", lockres->l_flags); |
cf0acdcd6 ocfs2: Abstract o... |
3005 |
ocfs2_dlm_dump_lksb(&lockres->l_lksb); |
ccd979bdb [PATCH] OCFS2: Th... |
3006 3007 |
BUG(); } |
73ac36ea1 fix similar typos... |
3008 3009 |
mlog(0, "lock %s, successful return from ocfs2_dlm_unlock ", |
ccd979bdb [PATCH] OCFS2: Th... |
3010 3011 3012 3013 |
lockres->l_name); ocfs2_wait_on_busy_lock(lockres); out: |
ccd979bdb [PATCH] OCFS2: Th... |
3014 3015 3016 3017 3018 |
return 0; } /* Mark the lockres as being dropped. It will no longer be * queued if blocking, but we still may have to wait on it |
34d024f84 ocfs2: Remove mou... |
3019 |
* being dequeued from the downconvert thread before we can consider |
2bd632165 ocfs2/trivial: Re... |
3020 |
* it safe to drop. |
ccd979bdb [PATCH] OCFS2: Th... |
3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 |
* * You can *not* attempt to call cluster_lock on this lockres anymore. */ void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres) { int status; struct ocfs2_mask_waiter mw; unsigned long flags; ocfs2_init_mask_waiter(&mw); spin_lock_irqsave(&lockres->l_lock, flags); lockres->l_flags |= OCFS2_LOCK_FREEING; while (lockres->l_flags & OCFS2_LOCK_QUEUED) { lockres_add_mask_waiter(lockres, &mw, OCFS2_LOCK_QUEUED, 0); spin_unlock_irqrestore(&lockres->l_lock, flags); mlog(0, "Waiting on lockres %s ", lockres->l_name); status = ocfs2_wait_for_mask(&mw); if (status) mlog_errno(status); spin_lock_irqsave(&lockres->l_lock, flags); } spin_unlock_irqrestore(&lockres->l_lock, flags); } |
d680efe9d ocfs2: Add new cl... |
3048 3049 |
void ocfs2_simple_drop_lockres(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres) |
ccd979bdb [PATCH] OCFS2: Th... |
3050 |
{ |
d680efe9d ocfs2: Add new cl... |
3051 |
int ret; |
ccd979bdb [PATCH] OCFS2: Th... |
3052 |
|
d680efe9d ocfs2: Add new cl... |
3053 |
ocfs2_mark_lockres_freeing(lockres); |
0d5dc6c2d ocfs2: Teach ocfs... |
3054 |
ret = ocfs2_drop_lock(osb, lockres); |
d680efe9d ocfs2: Add new cl... |
3055 3056 3057 |
if (ret) mlog_errno(ret); } |
ccd979bdb [PATCH] OCFS2: Th... |
3058 |
|
d680efe9d ocfs2: Add new cl... |
3059 3060 3061 3062 |
static void ocfs2_drop_osb_locks(struct ocfs2_super *osb) { ocfs2_simple_drop_lockres(osb, &osb->osb_super_lockres); ocfs2_simple_drop_lockres(osb, &osb->osb_rename_lockres); |
6ca497a83 ocfs2: fix rare s... |
3063 |
ocfs2_simple_drop_lockres(osb, &osb->osb_nfs_sync_lockres); |
83273932f ocfs2: timer to q... |
3064 |
ocfs2_simple_drop_lockres(osb, &osb->osb_orphan_scan.os_lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
3065 |
} |
ccd979bdb [PATCH] OCFS2: Th... |
3066 3067 3068 |
int ocfs2_drop_inode_locks(struct inode *inode) { int status, err; |
ccd979bdb [PATCH] OCFS2: Th... |
3069 |
|
ccd979bdb [PATCH] OCFS2: Th... |
3070 3071 3072 3073 |
/* No need to call ocfs2_mark_lockres_freeing here - * ocfs2_clear_inode has done it for us. */ err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb), |
500086300 ocfs2: Remove del... |
3074 |
&OCFS2_I(inode)->ip_open_lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
3075 3076 3077 3078 3079 3080 |
if (err < 0) mlog_errno(err); status = err; err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb), |
e63aecb65 ocfs2: Rename ocf... |
3081 |
&OCFS2_I(inode)->ip_inode_lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
3082 3083 3084 3085 3086 3087 |
if (err < 0) mlog_errno(err); if (err < 0 && !status) status = err; err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb), |
0d5dc6c2d ocfs2: Teach ocfs... |
3088 |
&OCFS2_I(inode)->ip_rw_lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
3089 3090 3091 3092 |
if (err < 0) mlog_errno(err); if (err < 0 && !status) status = err; |
ccd979bdb [PATCH] OCFS2: Th... |
3093 3094 |
return status; } |
de551246e ocfs2: Remove CAN... |
3095 3096 |
static unsigned int ocfs2_prepare_downconvert(struct ocfs2_lock_res *lockres, int new_level) |
ccd979bdb [PATCH] OCFS2: Th... |
3097 3098 |
{ assert_spin_locked(&lockres->l_lock); |
bd3e76105 ocfs2: Use global... |
3099 |
BUG_ON(lockres->l_blocking <= DLM_LOCK_NL); |
ccd979bdb [PATCH] OCFS2: Th... |
3100 3101 |
if (lockres->l_level <= new_level) { |
9b915181a ocfs2: Use a sepa... |
3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 |
mlog(ML_ERROR, "lockres %s, lvl %d <= %d, blcklst %d, mask %d, " "type %d, flags 0x%lx, hold %d %d, act %d %d, req %d, " "block %d, pgen %d ", lockres->l_name, lockres->l_level, new_level, list_empty(&lockres->l_blocked_list), list_empty(&lockres->l_mask_waiters), lockres->l_type, lockres->l_flags, lockres->l_ro_holders, lockres->l_ex_holders, lockres->l_action, lockres->l_unlock_action, lockres->l_requested, lockres->l_blocking, lockres->l_pending_gen); |
ccd979bdb [PATCH] OCFS2: Th... |
3112 3113 |
BUG(); } |
9b915181a ocfs2: Use a sepa... |
3114 3115 3116 |
mlog(ML_BASTS, "lockres %s, level %d => %d, blocking %d ", lockres->l_name, lockres->l_level, new_level, lockres->l_blocking); |
ccd979bdb [PATCH] OCFS2: Th... |
3117 3118 3119 3120 |
lockres->l_action = OCFS2_AST_DOWNCONVERT; lockres->l_requested = new_level; lockres_or_flags(lockres, OCFS2_LOCK_BUSY); |
de551246e ocfs2: Remove CAN... |
3121 |
return lockres_set_pending(lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
3122 3123 3124 3125 3126 |
} static int ocfs2_downconvert_lock(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres, int new_level, |
de551246e ocfs2: Remove CAN... |
3127 3128 |
int lvb, unsigned int generation) |
ccd979bdb [PATCH] OCFS2: Th... |
3129 |
{ |
bd3e76105 ocfs2: Use global... |
3130 3131 |
int ret; u32 dlm_flags = DLM_LKF_CONVERT; |
ccd979bdb [PATCH] OCFS2: Th... |
3132 |
|
9b915181a ocfs2: Use a sepa... |
3133 3134 3135 |
mlog(ML_BASTS, "lockres %s, level %d => %d ", lockres->l_name, lockres->l_level, new_level); |
ccd979bdb [PATCH] OCFS2: Th... |
3136 |
if (lvb) |
bd3e76105 ocfs2: Use global... |
3137 |
dlm_flags |= DLM_LKF_VALBLK; |
ccd979bdb [PATCH] OCFS2: Th... |
3138 |
|
4670c46de ocfs2: Introduce ... |
3139 |
ret = ocfs2_dlm_lock(osb->cconn, |
7431cd7e8 ocfs2: Use -errno... |
3140 3141 3142 3143 |
new_level, &lockres->l_lksb, dlm_flags, lockres->l_name, |
a796d2862 ocfs2: Pass lksbs... |
3144 |
OCFS2_LOCK_ID_MAX_LEN - 1); |
de551246e ocfs2: Remove CAN... |
3145 |
lockres_clear_pending(lockres, generation, osb); |
7431cd7e8 ocfs2: Use -errno... |
3146 3147 |
if (ret) { ocfs2_log_dlm_error("ocfs2_dlm_lock", ret, lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
3148 3149 3150 3151 3152 3153 |
ocfs2_recover_from_dlm_error(lockres, 1); goto bail; } ret = 0; bail: |
ccd979bdb [PATCH] OCFS2: Th... |
3154 3155 |
return ret; } |
24ef1815e ocfs2: Separate o... |
3156 |
/* returns 1 when the caller should unlock and call ocfs2_dlm_unlock */ |
ccd979bdb [PATCH] OCFS2: Th... |
3157 3158 3159 3160 |
static int ocfs2_prepare_cancel_convert(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres) { assert_spin_locked(&lockres->l_lock); |
ccd979bdb [PATCH] OCFS2: Th... |
3161 3162 3163 3164 |
if (lockres->l_unlock_action == OCFS2_UNLOCK_CANCEL_CONVERT) { /* If we're already trying to cancel a lock conversion * then just drop the spinlock and allow the caller to * requeue this lock. */ |
9b915181a ocfs2: Use a sepa... |
3165 3166 |
mlog(ML_BASTS, "lockres %s, skip convert ", lockres->l_name); |
ccd979bdb [PATCH] OCFS2: Th... |
3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 |
return 0; } /* were we in a convert when we got the bast fire? */ BUG_ON(lockres->l_action != OCFS2_AST_CONVERT && lockres->l_action != OCFS2_AST_DOWNCONVERT); /* set things up for the unlockast to know to just * clear out the ast_action and unset busy, etc. */ lockres->l_unlock_action = OCFS2_UNLOCK_CANCEL_CONVERT; mlog_bug_on_msg(!(lockres->l_flags & OCFS2_LOCK_BUSY), "lock %s, invalid flags: 0x%lx ", lockres->l_name, lockres->l_flags); |
9b915181a ocfs2: Use a sepa... |
3181 3182 |
mlog(ML_BASTS, "lockres %s ", lockres->l_name); |
ccd979bdb [PATCH] OCFS2: Th... |
3183 3184 3185 3186 3187 3188 3189 |
return 1; } static int ocfs2_cancel_convert(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres) { int ret; |
ccd979bdb [PATCH] OCFS2: Th... |
3190 |
|
4670c46de ocfs2: Introduce ... |
3191 |
ret = ocfs2_dlm_unlock(osb->cconn, &lockres->l_lksb, |
a796d2862 ocfs2: Pass lksbs... |
3192 |
DLM_LKF_CANCEL); |
7431cd7e8 ocfs2: Use -errno... |
3193 3194 |
if (ret) { ocfs2_log_dlm_error("ocfs2_dlm_unlock", ret, lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
3195 3196 |
ocfs2_recover_from_dlm_error(lockres, 0); } |
9b915181a ocfs2: Use a sepa... |
3197 3198 |
mlog(ML_BASTS, "lockres %s ", lockres->l_name); |
ccd979bdb [PATCH] OCFS2: Th... |
3199 |
|
ccd979bdb [PATCH] OCFS2: Th... |
3200 3201 |
return ret; } |
b5e500e23 ocfs2: Remove ->u... |
3202 3203 3204 |
static int ocfs2_unblock_lock(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres, struct ocfs2_unblock_ctl *ctl) |
ccd979bdb [PATCH] OCFS2: Th... |
3205 3206 3207 3208 |
{ unsigned long flags; int blocking; int new_level; |
079b80578 ocfs2: Plugs race... |
3209 |
int level; |
ccd979bdb [PATCH] OCFS2: Th... |
3210 |
int ret = 0; |
5ef0d4ea0 ocfs2: Add ->set_... |
3211 |
int set_lvb = 0; |
de551246e ocfs2: Remove CAN... |
3212 |
unsigned int gen; |
ccd979bdb [PATCH] OCFS2: Th... |
3213 |
|
ccd979bdb [PATCH] OCFS2: Th... |
3214 |
spin_lock_irqsave(&lockres->l_lock, flags); |
ccd979bdb [PATCH] OCFS2: Th... |
3215 |
recheck: |
db0f6ce69 ocfs2: Remove ove... |
3216 3217 3218 3219 3220 3221 3222 3223 3224 |
/* * Is it still blocking? If not, we have no more work to do. */ if (!(lockres->l_flags & OCFS2_LOCK_BLOCKED)) { BUG_ON(lockres->l_blocking != DLM_LOCK_NL); spin_unlock_irqrestore(&lockres->l_lock, flags); ret = 0; goto leave; } |
ccd979bdb [PATCH] OCFS2: Th... |
3225 |
if (lockres->l_flags & OCFS2_LOCK_BUSY) { |
de551246e ocfs2: Remove CAN... |
3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 |
/* XXX * This is a *big* race. The OCFS2_LOCK_PENDING flag * exists entirely for one reason - another thread has set * OCFS2_LOCK_BUSY, but has *NOT* yet called dlm_lock(). * * If we do ocfs2_cancel_convert() before the other thread * calls dlm_lock(), our cancel will do nothing. We will * get no ast, and we will have no way of knowing the * cancel failed. Meanwhile, the other thread will call * into dlm_lock() and wait...forever. * * Why forever? Because another node has asked for the * lock first; that's why we're here in unblock_lock(). * * The solution is OCFS2_LOCK_PENDING. When PENDING is * set, we just requeue the unblock. Only when the other * thread has called dlm_lock() and cleared PENDING will * we then cancel their request. * * All callers of dlm_lock() must set OCFS2_DLM_PENDING * at the same time they set OCFS2_DLM_BUSY. They must * clear OCFS2_DLM_PENDING after dlm_lock() returns. */ |
9b915181a ocfs2: Use a sepa... |
3249 3250 3251 3252 |
if (lockres->l_flags & OCFS2_LOCK_PENDING) { mlog(ML_BASTS, "lockres %s, ReQ: Pending ", lockres->l_name); |
de551246e ocfs2: Remove CAN... |
3253 |
goto leave_requeue; |
9b915181a ocfs2: Use a sepa... |
3254 |
} |
de551246e ocfs2: Remove CAN... |
3255 |
|
d680efe9d ocfs2: Add new cl... |
3256 |
ctl->requeue = 1; |
ccd979bdb [PATCH] OCFS2: Th... |
3257 3258 3259 3260 3261 3262 3263 3264 3265 |
ret = ocfs2_prepare_cancel_convert(osb, lockres); spin_unlock_irqrestore(&lockres->l_lock, flags); if (ret) { ret = ocfs2_cancel_convert(osb, lockres); if (ret < 0) mlog_errno(ret); } goto leave; } |
a19128260 ocfs2: Prevent a ... |
3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 |
/* * This prevents livelocks. OCFS2_LOCK_UPCONVERT_FINISHING flag is * set when the ast is received for an upconvert just before the * OCFS2_LOCK_BUSY flag is cleared. Now if the fs received a bast * on the heels of the ast, we want to delay the downconvert just * enough to allow the up requestor to do its task. Because this * lock is in the blocked queue, the lock will be downconverted * as soon as the requestor is done with the lock. */ if (lockres->l_flags & OCFS2_LOCK_UPCONVERT_FINISHING) goto leave_requeue; |
0d74125a6 ocfs2: Do not dow... |
3277 3278 3279 3280 3281 3282 3283 |
/* * How can we block and yet be at NL? We were trying to upconvert * from NL and got canceled. The code comes back here, and now * we notice and clear BLOCKING. */ if (lockres->l_level == DLM_LOCK_NL) { BUG_ON(lockres->l_ex_holders || lockres->l_ro_holders); |
9b915181a ocfs2: Use a sepa... |
3284 3285 |
mlog(ML_BASTS, "lockres %s, Aborting dc ", lockres->l_name); |
0d74125a6 ocfs2: Do not dow... |
3286 3287 3288 3289 3290 |
lockres->l_blocking = DLM_LOCK_NL; lockres_clear_flags(lockres, OCFS2_LOCK_BLOCKED); spin_unlock_irqrestore(&lockres->l_lock, flags); goto leave; } |
ccd979bdb [PATCH] OCFS2: Th... |
3291 3292 |
/* if we're blocking an exclusive and we have *any* holders, * then requeue. */ |
bd3e76105 ocfs2: Use global... |
3293 |
if ((lockres->l_blocking == DLM_LOCK_EX) |
9b915181a ocfs2: Use a sepa... |
3294 3295 3296 3297 3298 |
&& (lockres->l_ex_holders || lockres->l_ro_holders)) { mlog(ML_BASTS, "lockres %s, ReQ: EX/PR Holders %u,%u ", lockres->l_name, lockres->l_ex_holders, lockres->l_ro_holders); |
f7fbfdd1f ocfs2: Check for ... |
3299 |
goto leave_requeue; |
9b915181a ocfs2: Use a sepa... |
3300 |
} |
ccd979bdb [PATCH] OCFS2: Th... |
3301 3302 3303 |
/* If it's a PR we're blocking, then only * requeue if we've got any EX holders */ |
bd3e76105 ocfs2: Use global... |
3304 |
if (lockres->l_blocking == DLM_LOCK_PR && |
9b915181a ocfs2: Use a sepa... |
3305 3306 3307 3308 |
lockres->l_ex_holders) { mlog(ML_BASTS, "lockres %s, ReQ: EX Holders %u ", lockres->l_name, lockres->l_ex_holders); |
f7fbfdd1f ocfs2: Check for ... |
3309 |
goto leave_requeue; |
9b915181a ocfs2: Use a sepa... |
3310 |
} |
f7fbfdd1f ocfs2: Check for ... |
3311 3312 3313 3314 3315 3316 |
/* * Can we get a lock in this state if the holder counts are * zero? The meta data unblock code used to check this. */ if ((lockres->l_ops->flags & LOCK_TYPE_REQUIRES_REFRESH) |
9b915181a ocfs2: Use a sepa... |
3317 3318 3319 3320 |
&& (lockres->l_flags & OCFS2_LOCK_REFRESHING)) { mlog(ML_BASTS, "lockres %s, ReQ: Lock Refreshing ", lockres->l_name); |
f7fbfdd1f ocfs2: Check for ... |
3321 |
goto leave_requeue; |
9b915181a ocfs2: Use a sepa... |
3322 |
} |
ccd979bdb [PATCH] OCFS2: Th... |
3323 |
|
16d5b9567 ocfs2: Add ->chec... |
3324 3325 3326 |
new_level = ocfs2_highest_compat_lock_level(lockres->l_blocking); if (lockres->l_ops->check_downconvert |
9b915181a ocfs2: Use a sepa... |
3327 3328 3329 3330 |
&& !lockres->l_ops->check_downconvert(lockres, new_level)) { mlog(ML_BASTS, "lockres %s, ReQ: Checkpointing ", lockres->l_name); |
16d5b9567 ocfs2: Add ->chec... |
3331 |
goto leave_requeue; |
9b915181a ocfs2: Use a sepa... |
3332 |
} |
16d5b9567 ocfs2: Add ->chec... |
3333 |
|
ccd979bdb [PATCH] OCFS2: Th... |
3334 3335 3336 |
/* If we get here, then we know that there are no more * incompatible holders (and anyone asking for an incompatible * lock is blocked). We can now downconvert the lock */ |
cc567d89b ocfs2: move downc... |
3337 |
if (!lockres->l_ops->downconvert_worker) |
ccd979bdb [PATCH] OCFS2: Th... |
3338 3339 3340 3341 3342 3343 3344 |
goto downconvert; /* Some lockres types want to do a bit of work before * downconverting a lock. Allow that here. The worker function * may sleep, so we save off a copy of what we're blocking as * it may change while we're not holding the spin lock. */ blocking = lockres->l_blocking; |
079b80578 ocfs2: Plugs race... |
3345 |
level = lockres->l_level; |
ccd979bdb [PATCH] OCFS2: Th... |
3346 |
spin_unlock_irqrestore(&lockres->l_lock, flags); |
cc567d89b ocfs2: move downc... |
3347 |
ctl->unblock_action = lockres->l_ops->downconvert_worker(lockres, blocking); |
d680efe9d ocfs2: Add new cl... |
3348 |
|
9b915181a ocfs2: Use a sepa... |
3349 3350 3351 3352 |
if (ctl->unblock_action == UNBLOCK_STOP_POST) { mlog(ML_BASTS, "lockres %s, UNBLOCK_STOP_POST ", lockres->l_name); |
d680efe9d ocfs2: Add new cl... |
3353 |
goto leave; |
9b915181a ocfs2: Use a sepa... |
3354 |
} |
ccd979bdb [PATCH] OCFS2: Th... |
3355 3356 |
spin_lock_irqsave(&lockres->l_lock, flags); |
079b80578 ocfs2: Plugs race... |
3357 |
if ((blocking != lockres->l_blocking) || (level != lockres->l_level)) { |
ccd979bdb [PATCH] OCFS2: Th... |
3358 3359 |
/* If this changed underneath us, then we can't drop * it just yet. */ |
9b915181a ocfs2: Use a sepa... |
3360 3361 3362 3363 |
mlog(ML_BASTS, "lockres %s, block=%d:%d, level=%d:%d, " "Recheck ", lockres->l_name, blocking, lockres->l_blocking, level, lockres->l_level); |
ccd979bdb [PATCH] OCFS2: Th... |
3364 3365 3366 3367 |
goto recheck; } downconvert: |
d680efe9d ocfs2: Add new cl... |
3368 |
ctl->requeue = 0; |
ccd979bdb [PATCH] OCFS2: Th... |
3369 |
|
5ef0d4ea0 ocfs2: Add ->set_... |
3370 |
if (lockres->l_ops->flags & LOCK_TYPE_USES_LVB) { |
bd3e76105 ocfs2: Use global... |
3371 |
if (lockres->l_level == DLM_LOCK_EX) |
5ef0d4ea0 ocfs2: Add ->set_... |
3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 |
set_lvb = 1; /* * We only set the lvb if the lock has been fully * refreshed - otherwise we risk setting stale * data. Otherwise, there's no need to actually clear * out the lvb here as it's value is still valid. */ if (set_lvb && !(lockres->l_flags & OCFS2_LOCK_NEEDS_REFRESH)) lockres->l_ops->set_lvb(lockres); } |
de551246e ocfs2: Remove CAN... |
3383 |
gen = ocfs2_prepare_downconvert(lockres, new_level); |
ccd979bdb [PATCH] OCFS2: Th... |
3384 |
spin_unlock_irqrestore(&lockres->l_lock, flags); |
de551246e ocfs2: Remove CAN... |
3385 3386 |
ret = ocfs2_downconvert_lock(osb, lockres, new_level, set_lvb, gen); |
ccd979bdb [PATCH] OCFS2: Th... |
3387 |
leave: |
c1e8d35ef ocfs2: Remove EXI... |
3388 3389 |
if (ret) mlog_errno(ret); |
ccd979bdb [PATCH] OCFS2: Th... |
3390 |
return ret; |
f7fbfdd1f ocfs2: Check for ... |
3391 3392 3393 3394 |
leave_requeue: spin_unlock_irqrestore(&lockres->l_lock, flags); ctl->requeue = 1; |
f7fbfdd1f ocfs2: Check for ... |
3395 |
return 0; |
ccd979bdb [PATCH] OCFS2: Th... |
3396 |
} |
d680efe9d ocfs2: Add new cl... |
3397 3398 |
static int ocfs2_data_convert_worker(struct ocfs2_lock_res *lockres, int blocking) |
ccd979bdb [PATCH] OCFS2: Th... |
3399 3400 3401 |
{ struct inode *inode; struct address_space *mapping; |
5e98d4924 Track negative en... |
3402 |
struct ocfs2_inode_info *oi; |
ccd979bdb [PATCH] OCFS2: Th... |
3403 |
|
ccd979bdb [PATCH] OCFS2: Th... |
3404 3405 |
inode = ocfs2_lock_res_inode(lockres); mapping = inode->i_mapping; |
5e98d4924 Track negative en... |
3406 3407 3408 3409 3410 3411 3412 |
if (S_ISDIR(inode->i_mode)) { oi = OCFS2_I(inode); oi->ip_dir_lock_gen++; mlog(0, "generation: %u ", oi->ip_dir_lock_gen); goto out; } |
1044e401a ocfs2: Fix writeo... |
3413 |
if (!S_ISREG(inode->i_mode)) |
f1f540688 ocfs2: Add data d... |
3414 |
goto out; |
7f4a2a97e ocfs2: always unm... |
3415 3416 3417 3418 3419 3420 3421 3422 |
/* * We need this before the filemap_fdatawrite() so that it can * transfer the dirty bit from the PTE to the * page. Unfortunately this means that even for EX->PR * downconverts, we'll lose our mappings and have to build * them up again. */ unmap_mapping_range(mapping, 0, 0, 0); |
ccd979bdb [PATCH] OCFS2: Th... |
3423 |
if (filemap_fdatawrite(mapping)) { |
b0697053f ocfs2: don't use ... |
3424 3425 |
mlog(ML_ERROR, "Could not sync inode %llu for downconvert!", (unsigned long long)OCFS2_I(inode)->ip_blkno); |
ccd979bdb [PATCH] OCFS2: Th... |
3426 3427 |
} sync_mapping_buffers(mapping); |
bd3e76105 ocfs2: Use global... |
3428 |
if (blocking == DLM_LOCK_EX) { |
ccd979bdb [PATCH] OCFS2: Th... |
3429 |
truncate_inode_pages(mapping, 0); |
ccd979bdb [PATCH] OCFS2: Th... |
3430 3431 3432 3433 3434 3435 3436 3437 |
} else { /* We only need to wait on the I/O if we're not also * truncating pages because truncate_inode_pages waits * for us above. We don't truncate pages if we're * blocking anything < EXMODE because we want to keep * them around in that case. */ filemap_fdatawait(mapping); } |
f1f540688 ocfs2: Add data d... |
3438 |
out: |
d680efe9d ocfs2: Add new cl... |
3439 |
return UNBLOCK_CONTINUE; |
ccd979bdb [PATCH] OCFS2: Th... |
3440 |
} |
a43384813 ocfs2: Abstract c... |
3441 3442 3443 |
static int ocfs2_ci_checkpointed(struct ocfs2_caching_info *ci, struct ocfs2_lock_res *lockres, int new_level) |
810d5aeba ocfs2: Have the m... |
3444 |
{ |
a43384813 ocfs2: Abstract c... |
3445 |
int checkpointed = ocfs2_ci_fully_checkpointed(ci); |
810d5aeba ocfs2: Have the m... |
3446 |
|
bd3e76105 ocfs2: Use global... |
3447 3448 |
BUG_ON(new_level != DLM_LOCK_NL && new_level != DLM_LOCK_PR); BUG_ON(lockres->l_level != DLM_LOCK_EX && !checkpointed); |
810d5aeba ocfs2: Have the m... |
3449 3450 3451 |
if (checkpointed) return 1; |
a43384813 ocfs2: Abstract c... |
3452 |
ocfs2_start_checkpoint(OCFS2_SB(ocfs2_metadata_cache_get_super(ci))); |
810d5aeba ocfs2: Have the m... |
3453 3454 |
return 0; } |
a43384813 ocfs2: Abstract c... |
3455 3456 3457 3458 3459 3460 3461 |
static int ocfs2_check_meta_downconvert(struct ocfs2_lock_res *lockres, int new_level) { struct inode *inode = ocfs2_lock_res_inode(lockres); return ocfs2_ci_checkpointed(INODE_CACHE(inode), lockres, new_level); } |
810d5aeba ocfs2: Have the m... |
3462 3463 3464 3465 3466 3467 |
static void ocfs2_set_meta_lvb(struct ocfs2_lock_res *lockres) { struct inode *inode = ocfs2_lock_res_inode(lockres); __ocfs2_stuff_meta_lvb(inode); } |
d680efe9d ocfs2: Add new cl... |
3468 3469 |
/* * Does the final reference drop on our dentry lock. Right now this |
34d024f84 ocfs2: Remove mou... |
3470 |
* happens in the downconvert thread, but we could choose to simplify the |
d680efe9d ocfs2: Add new cl... |
3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 |
* dlmglue API and push these off to the ocfs2_wq in the future. */ static void ocfs2_dentry_post_unlock(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres) { struct ocfs2_dentry_lock *dl = ocfs2_lock_res_dl(lockres); ocfs2_dentry_lock_put(osb, dl); } /* * d_delete() matching dentries before the lock downconvert. * * At this point, any process waiting to destroy the * dentry_lock due to last ref count is stopped by the * OCFS2_LOCK_QUEUED flag. * * We have two potential problems * * 1) If we do the last reference drop on our dentry_lock (via dput) * we'll wind up in ocfs2_release_dentry_lock(), waiting on * the downconvert to finish. Instead we take an elevated * reference and push the drop until after we've completed our * unblock processing. * * 2) There might be another process with a final reference, * waiting on us to finish processing. If this is the case, we * detect it and exit out - there's no more dentries anyway. */ static int ocfs2_dentry_convert_worker(struct ocfs2_lock_res *lockres, int blocking) { struct ocfs2_dentry_lock *dl = ocfs2_lock_res_dl(lockres); struct ocfs2_inode_info *oi = OCFS2_I(dl->dl_inode); struct dentry *dentry; unsigned long flags; int extra_ref = 0; /* * This node is blocking another node from getting a read * lock. This happens when we've renamed within a * directory. We've forced the other nodes to d_delete(), but * we never actually dropped our lock because it's still * valid. The downconvert code will retain a PR for this node, * so there's no further work to do. */ |
bd3e76105 ocfs2: Use global... |
3516 |
if (blocking == DLM_LOCK_PR) |
d680efe9d ocfs2: Add new cl... |
3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 |
return UNBLOCK_CONTINUE; /* * Mark this inode as potentially orphaned. The code in * ocfs2_delete_inode() will figure out whether it actually * needs to be freed or not. */ spin_lock(&oi->ip_lock); oi->ip_flags |= OCFS2_INODE_MAYBE_ORPHANED; spin_unlock(&oi->ip_lock); /* * Yuck. We need to make sure however that the check of * OCFS2_LOCK_FREEING and the extra reference are atomic with * respect to a reference decrement or the setting of that * flag. */ spin_lock_irqsave(&lockres->l_lock, flags); spin_lock(&dentry_attach_lock); if (!(lockres->l_flags & OCFS2_LOCK_FREEING) && dl->dl_count) { dl->dl_count++; extra_ref = 1; } spin_unlock(&dentry_attach_lock); spin_unlock_irqrestore(&lockres->l_lock, flags); mlog(0, "extra_ref = %d ", extra_ref); /* * We have a process waiting on us in ocfs2_dentry_iput(), * which means we can't have any more outstanding * aliases. There's no need to do any more work. */ if (!extra_ref) return UNBLOCK_CONTINUE; spin_lock(&dentry_attach_lock); while (1) { dentry = ocfs2_find_local_alias(dl->dl_inode, dl->dl_parent_blkno, 1); if (!dentry) break; spin_unlock(&dentry_attach_lock); mlog(0, "d_delete(%.*s); ", dentry->d_name.len, dentry->d_name.name); /* * The following dcache calls may do an * iput(). Normally we don't want that from the * downconverting thread, but in this case it's ok * because the requesting node already has an * exclusive lock on the inode, so it can't be queued * for a downconvert. */ d_delete(dentry); dput(dentry); spin_lock(&dentry_attach_lock); } spin_unlock(&dentry_attach_lock); /* * If we are the last holder of this dentry lock, there is no * reason to downconvert so skip straight to the unlock. */ if (dl->dl_count == 1) return UNBLOCK_STOP_POST; return UNBLOCK_CONTINUE_POST; } |
8dec98edf ocfs2: Add new re... |
3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 |
static int ocfs2_check_refcount_downconvert(struct ocfs2_lock_res *lockres, int new_level) { struct ocfs2_refcount_tree *tree = ocfs2_lock_res_refcount_tree(lockres); return ocfs2_ci_checkpointed(&tree->rf_ci, lockres, new_level); } static int ocfs2_refcount_convert_worker(struct ocfs2_lock_res *lockres, int blocking) { struct ocfs2_refcount_tree *tree = ocfs2_lock_res_refcount_tree(lockres); ocfs2_metadata_cache_purge(&tree->rf_ci); return UNBLOCK_CONTINUE; } |
9e33d69f5 ocfs2: Implementa... |
3610 3611 3612 3613 3614 3615 |
static void ocfs2_set_qinfo_lvb(struct ocfs2_lock_res *lockres) { struct ocfs2_qinfo_lvb *lvb; struct ocfs2_mem_dqinfo *oinfo = ocfs2_lock_res_qinfo(lockres); struct mem_dqinfo *info = sb_dqinfo(oinfo->dqi_gi.dqi_sb, oinfo->dqi_gi.dqi_type); |
a641dc2a5 ocfs2: remove unn... |
3616 |
lvb = ocfs2_dlm_lvb(&lockres->l_lksb); |
9e33d69f5 ocfs2: Implementa... |
3617 3618 3619 3620 3621 3622 3623 |
lvb->lvb_version = OCFS2_QINFO_LVB_VERSION; lvb->lvb_bgrace = cpu_to_be32(info->dqi_bgrace); lvb->lvb_igrace = cpu_to_be32(info->dqi_igrace); lvb->lvb_syncms = cpu_to_be32(oinfo->dqi_syncms); lvb->lvb_blocks = cpu_to_be32(oinfo->dqi_gi.dqi_blocks); lvb->lvb_free_blk = cpu_to_be32(oinfo->dqi_gi.dqi_free_blk); lvb->lvb_free_entry = cpu_to_be32(oinfo->dqi_gi.dqi_free_entry); |
9e33d69f5 ocfs2: Implementa... |
3624 3625 3626 3627 3628 3629 3630 |
} void ocfs2_qinfo_unlock(struct ocfs2_mem_dqinfo *oinfo, int ex) { struct ocfs2_lock_res *lockres = &oinfo->dqi_gqlock; struct ocfs2_super *osb = OCFS2_SB(oinfo->dqi_gi.dqi_sb); int level = ex ? DLM_LOCK_EX : DLM_LOCK_PR; |
9e33d69f5 ocfs2: Implementa... |
3631 3632 |
if (!ocfs2_is_hard_readonly(osb) && !ocfs2_mount_local(osb)) ocfs2_cluster_unlock(osb, lockres, level); |
9e33d69f5 ocfs2: Implementa... |
3633 3634 3635 3636 3637 3638 3639 3640 |
} static int ocfs2_refresh_qinfo(struct ocfs2_mem_dqinfo *oinfo) { struct mem_dqinfo *info = sb_dqinfo(oinfo->dqi_gi.dqi_sb, oinfo->dqi_gi.dqi_type); struct ocfs2_lock_res *lockres = &oinfo->dqi_gqlock; struct ocfs2_qinfo_lvb *lvb = ocfs2_dlm_lvb(&lockres->l_lksb); |
85eb8b73d ocfs2: Fix ocfs2_... |
3641 |
struct buffer_head *bh = NULL; |
9e33d69f5 ocfs2: Implementa... |
3642 3643 |
struct ocfs2_global_disk_dqinfo *gdinfo; int status = 0; |
1c520dfbf ocfs2: Provide th... |
3644 3645 |
if (ocfs2_dlm_lvb_valid(&lockres->l_lksb) && lvb->lvb_version == OCFS2_QINFO_LVB_VERSION) { |
9e33d69f5 ocfs2: Implementa... |
3646 3647 3648 3649 3650 3651 3652 3653 |
info->dqi_bgrace = be32_to_cpu(lvb->lvb_bgrace); info->dqi_igrace = be32_to_cpu(lvb->lvb_igrace); oinfo->dqi_syncms = be32_to_cpu(lvb->lvb_syncms); oinfo->dqi_gi.dqi_blocks = be32_to_cpu(lvb->lvb_blocks); oinfo->dqi_gi.dqi_free_blk = be32_to_cpu(lvb->lvb_free_blk); oinfo->dqi_gi.dqi_free_entry = be32_to_cpu(lvb->lvb_free_entry); } else { |
ae4f6ef13 ocfs2: Avoid unne... |
3654 3655 |
status = ocfs2_read_quota_phys_block(oinfo->dqi_gqinode, oinfo->dqi_giblk, &bh); |
85eb8b73d ocfs2: Fix ocfs2_... |
3656 |
if (status) { |
9e33d69f5 ocfs2: Implementa... |
3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 |
mlog_errno(status); goto bail; } gdinfo = (struct ocfs2_global_disk_dqinfo *) (bh->b_data + OCFS2_GLOBAL_INFO_OFF); info->dqi_bgrace = le32_to_cpu(gdinfo->dqi_bgrace); info->dqi_igrace = le32_to_cpu(gdinfo->dqi_igrace); oinfo->dqi_syncms = le32_to_cpu(gdinfo->dqi_syncms); oinfo->dqi_gi.dqi_blocks = le32_to_cpu(gdinfo->dqi_blocks); oinfo->dqi_gi.dqi_free_blk = le32_to_cpu(gdinfo->dqi_free_blk); oinfo->dqi_gi.dqi_free_entry = le32_to_cpu(gdinfo->dqi_free_entry); brelse(bh); ocfs2_track_lock_refresh(lockres); } bail: return status; } /* Lock quota info, this function expects at least shared lock on the quota file * so that we can safely refresh quota info from disk. */ int ocfs2_qinfo_lock(struct ocfs2_mem_dqinfo *oinfo, int ex) { struct ocfs2_lock_res *lockres = &oinfo->dqi_gqlock; struct ocfs2_super *osb = OCFS2_SB(oinfo->dqi_gi.dqi_sb); int level = ex ? DLM_LOCK_EX : DLM_LOCK_PR; int status = 0; |
9e33d69f5 ocfs2: Implementa... |
3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 |
/* On RO devices, locking really isn't needed... */ if (ocfs2_is_hard_readonly(osb)) { if (ex) status = -EROFS; goto bail; } if (ocfs2_mount_local(osb)) goto bail; status = ocfs2_cluster_lock(osb, lockres, level, 0, 0); if (status < 0) { mlog_errno(status); goto bail; } if (!ocfs2_should_refresh_lock_res(lockres)) goto bail; /* OK, we have the lock but we need to refresh the quota info */ status = ocfs2_refresh_qinfo(oinfo); if (status) ocfs2_qinfo_unlock(oinfo, ex); ocfs2_complete_lock_res_refresh(lockres, status); bail: |
9e33d69f5 ocfs2: Implementa... |
3707 3708 |
return status; } |
8dec98edf ocfs2: Add new re... |
3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 |
int ocfs2_refcount_lock(struct ocfs2_refcount_tree *ref_tree, int ex) { int status; int level = ex ? DLM_LOCK_EX : DLM_LOCK_PR; struct ocfs2_lock_res *lockres = &ref_tree->rf_lockres; struct ocfs2_super *osb = lockres->l_priv; if (ocfs2_is_hard_readonly(osb)) return -EROFS; if (ocfs2_mount_local(osb)) return 0; status = ocfs2_cluster_lock(osb, lockres, level, 0, 0); if (status < 0) mlog_errno(status); return status; } void ocfs2_refcount_unlock(struct ocfs2_refcount_tree *ref_tree, int ex) { int level = ex ? DLM_LOCK_EX : DLM_LOCK_PR; struct ocfs2_lock_res *lockres = &ref_tree->rf_lockres; struct ocfs2_super *osb = lockres->l_priv; if (!ocfs2_mount_local(osb)) ocfs2_cluster_unlock(osb, lockres, level); } |
006000566 [2.6 patch] fs/oc... |
3739 3740 |
static void ocfs2_process_blocked_lock(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres) |
ccd979bdb [PATCH] OCFS2: Th... |
3741 3742 |
{ int status; |
d680efe9d ocfs2: Add new cl... |
3743 |
struct ocfs2_unblock_ctl ctl = {0, 0,}; |
ccd979bdb [PATCH] OCFS2: Th... |
3744 3745 3746 3747 3748 |
unsigned long flags; /* Our reference to the lockres in this function can be * considered valid until we remove the OCFS2_LOCK_QUEUED * flag. */ |
ccd979bdb [PATCH] OCFS2: Th... |
3749 3750 |
BUG_ON(!lockres); BUG_ON(!lockres->l_ops); |
ccd979bdb [PATCH] OCFS2: Th... |
3751 |
|
9b915181a ocfs2: Use a sepa... |
3752 3753 |
mlog(ML_BASTS, "lockres %s blocked ", lockres->l_name); |
ccd979bdb [PATCH] OCFS2: Th... |
3754 3755 |
/* Detect whether a lock has been marked as going away while |
34d024f84 ocfs2: Remove mou... |
3756 |
* the downconvert thread was processing other things. A lock can |
ccd979bdb [PATCH] OCFS2: Th... |
3757 3758 3759 3760 3761 3762 3763 |
* still be marked with OCFS2_LOCK_FREEING after this check, * but short circuiting here will still save us some * performance. */ spin_lock_irqsave(&lockres->l_lock, flags); if (lockres->l_flags & OCFS2_LOCK_FREEING) goto unqueue; spin_unlock_irqrestore(&lockres->l_lock, flags); |
b5e500e23 ocfs2: Remove ->u... |
3764 |
status = ocfs2_unblock_lock(osb, lockres, &ctl); |
ccd979bdb [PATCH] OCFS2: Th... |
3765 3766 3767 3768 3769 |
if (status < 0) mlog_errno(status); spin_lock_irqsave(&lockres->l_lock, flags); unqueue: |
d680efe9d ocfs2: Add new cl... |
3770 |
if (lockres->l_flags & OCFS2_LOCK_FREEING || !ctl.requeue) { |
ccd979bdb [PATCH] OCFS2: Th... |
3771 3772 3773 |
lockres_clear_flags(lockres, OCFS2_LOCK_QUEUED); } else ocfs2_schedule_blocked_lock(osb, lockres); |
9b915181a ocfs2: Use a sepa... |
3774 3775 |
mlog(ML_BASTS, "lockres %s, requeue = %s. ", lockres->l_name, |
d680efe9d ocfs2: Add new cl... |
3776 |
ctl.requeue ? "yes" : "no"); |
ccd979bdb [PATCH] OCFS2: Th... |
3777 |
spin_unlock_irqrestore(&lockres->l_lock, flags); |
d680efe9d ocfs2: Add new cl... |
3778 3779 3780 |
if (ctl.unblock_action != UNBLOCK_CONTINUE && lockres->l_ops->post_unlock) lockres->l_ops->post_unlock(osb, lockres); |
ccd979bdb [PATCH] OCFS2: Th... |
3781 3782 3783 3784 3785 |
} static void ocfs2_schedule_blocked_lock(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres) { |
ccd979bdb [PATCH] OCFS2: Th... |
3786 3787 3788 3789 3790 3791 |
assert_spin_locked(&lockres->l_lock); if (lockres->l_flags & OCFS2_LOCK_FREEING) { /* Do not schedule a lock for downconvert when it's on * the way to destruction - any nodes wanting access * to the resource will get it soon. */ |
9b915181a ocfs2: Use a sepa... |
3792 3793 |
mlog(ML_BASTS, "lockres %s won't be scheduled: flags 0x%lx ", |
ccd979bdb [PATCH] OCFS2: Th... |
3794 3795 3796 3797 3798 |
lockres->l_name, lockres->l_flags); return; } lockres_or_flags(lockres, OCFS2_LOCK_QUEUED); |
34d024f84 ocfs2: Remove mou... |
3799 |
spin_lock(&osb->dc_task_lock); |
ccd979bdb [PATCH] OCFS2: Th... |
3800 3801 3802 3803 3804 |
if (list_empty(&lockres->l_blocked_list)) { list_add_tail(&lockres->l_blocked_list, &osb->blocked_lock_list); osb->blocked_lock_count++; } |
34d024f84 ocfs2: Remove mou... |
3805 |
spin_unlock(&osb->dc_task_lock); |
ccd979bdb [PATCH] OCFS2: Th... |
3806 |
} |
34d024f84 ocfs2: Remove mou... |
3807 3808 3809 3810 3811 |
static void ocfs2_downconvert_thread_do_work(struct ocfs2_super *osb) { unsigned long processed; struct ocfs2_lock_res *lockres; |
34d024f84 ocfs2: Remove mou... |
3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 |
spin_lock(&osb->dc_task_lock); /* grab this early so we know to try again if a state change and * wake happens part-way through our work */ osb->dc_work_sequence = osb->dc_wake_sequence; processed = osb->blocked_lock_count; while (processed) { BUG_ON(list_empty(&osb->blocked_lock_list)); lockres = list_entry(osb->blocked_lock_list.next, struct ocfs2_lock_res, l_blocked_list); list_del_init(&lockres->l_blocked_list); osb->blocked_lock_count--; spin_unlock(&osb->dc_task_lock); BUG_ON(!processed); processed--; ocfs2_process_blocked_lock(osb, lockres); spin_lock(&osb->dc_task_lock); } spin_unlock(&osb->dc_task_lock); |
34d024f84 ocfs2: Remove mou... |
3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 |
} static int ocfs2_downconvert_thread_lists_empty(struct ocfs2_super *osb) { int empty = 0; spin_lock(&osb->dc_task_lock); if (list_empty(&osb->blocked_lock_list)) empty = 1; spin_unlock(&osb->dc_task_lock); return empty; } static int ocfs2_downconvert_thread_should_wake(struct ocfs2_super *osb) { int should_wake = 0; spin_lock(&osb->dc_task_lock); if (osb->dc_work_sequence != osb->dc_wake_sequence) should_wake = 1; spin_unlock(&osb->dc_task_lock); return should_wake; } |
200bfae37 [2.6 patch] make ... |
3860 |
static int ocfs2_downconvert_thread(void *arg) |
34d024f84 ocfs2: Remove mou... |
3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891 3892 |
{ int status = 0; struct ocfs2_super *osb = arg; /* only quit once we've been asked to stop and there is no more * work available */ while (!(kthread_should_stop() && ocfs2_downconvert_thread_lists_empty(osb))) { wait_event_interruptible(osb->dc_event, ocfs2_downconvert_thread_should_wake(osb) || kthread_should_stop()); mlog(0, "downconvert_thread: awoken "); ocfs2_downconvert_thread_do_work(osb); } osb->dc_task = NULL; return status; } void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb) { spin_lock(&osb->dc_task_lock); /* make sure the voting thread gets a swipe at whatever changes * the caller may have made to the voting state */ osb->dc_wake_sequence++; spin_unlock(&osb->dc_task_lock); wake_up(&osb->dc_event); } |