diff --git a/fs/ceph/locks.c b/fs/ceph/locks.c index 06ea5cd05cd9ebcf47161b813fc0a39472911b93..4347039ecc183d538c23f32019e5213da2ebf2f4 100644 --- a/fs/ceph/locks.c +++ b/fs/ceph/locks.c @@ -245,6 +245,7 @@ int ceph_flock(struct file *file, int cmd, struct file_lock *fl) */ void ceph_count_locks(struct inode *inode, int *fcntl_count, int *flock_count) { + struct file_lock *lock; struct file_lock_context *ctx; *fcntl_count = 0; @@ -252,8 +253,12 @@ void ceph_count_locks(struct inode *inode, int *fcntl_count, int *flock_count) ctx = inode->i_flctx; if (ctx) { - *fcntl_count = ctx->flc_posix_cnt; - *flock_count = ctx->flc_flock_cnt; + spin_lock(&ctx->flc_lock); + list_for_each_entry(lock, &ctx->flc_posix, fl_list) + ++(*fcntl_count); + list_for_each_entry(lock, &ctx->flc_flock, fl_list) + ++(*flock_count); + spin_unlock(&ctx->flc_lock); } dout("counted %d flock locks and %d fcntl locks", *flock_count, *fcntl_count); diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 8fe1f7a21b3eaa60b27c346edfb3f0e9c2f7b25c..a94b3e67318283dd54d61fc595ecb2037ba3a515 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -1129,7 +1129,7 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile) struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); struct file_lock *flock; struct file_lock_context *flctx = inode->i_flctx; - unsigned int i; + unsigned int count = 0, i; int rc = 0, xid, type; struct list_head locks_to_send, *el; struct lock_to_push *lck, *tmp; @@ -1140,14 +1140,20 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile) if (!flctx) goto out; + spin_lock(&flctx->flc_lock); + list_for_each(el, &flctx->flc_posix) { + count++; + } + spin_unlock(&flctx->flc_lock); + INIT_LIST_HEAD(&locks_to_send); /* - * Allocating flc_posix_cnt locks is enough because no FL_POSIX locks - * can be added to the list while we are holding cinode->lock_sem that + * Allocating count locks is enough because no FL_POSIX locks can be + * added to the list while we are holding cinode->lock_sem that * protects locking operations of this inode. */ - for (i = 0; i < flctx->flc_posix_cnt; i++) { + for (i = 0; i < count; i++) { lck = kmalloc(sizeof(struct lock_to_push), GFP_KERNEL); if (!lck) { rc = -ENOMEM; diff --git a/fs/locks.c b/fs/locks.c index 4753218f308ed32ee8b09123b11bc9cba42a6af4..365c82e1b3a9a602057e65edc9b857c6adce6b76 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -681,21 +681,18 @@ static void locks_wake_up_blocks(struct file_lock *blocker) } static void -locks_insert_lock_ctx(struct file_lock *fl, int *counter, - struct list_head *before) +locks_insert_lock_ctx(struct file_lock *fl, struct list_head *before) { fl->fl_nspid = get_pid(task_tgid(current)); list_add_tail(&fl->fl_list, before); - ++*counter; locks_insert_global_locks(fl); } static void -locks_unlink_lock_ctx(struct file_lock *fl, int *counter) +locks_unlink_lock_ctx(struct file_lock *fl) { locks_delete_global_locks(fl); list_del_init(&fl->fl_list); - --*counter; if (fl->fl_nspid) { put_pid(fl->fl_nspid); fl->fl_nspid = NULL; @@ -704,10 +701,9 @@ locks_unlink_lock_ctx(struct file_lock *fl, int *counter) } static void -locks_delete_lock_ctx(struct file_lock *fl, int *counter, - struct list_head *dispose) +locks_delete_lock_ctx(struct file_lock *fl, struct list_head *dispose) { - locks_unlink_lock_ctx(fl, counter); + locks_unlink_lock_ctx(fl); if (dispose) list_add(&fl->fl_list, dispose); else @@ -895,7 +891,7 @@ static int flock_lock_file(struct file *filp, struct file_lock *request) if (request->fl_type == fl->fl_type) goto out; found = true; - locks_delete_lock_ctx(fl, &ctx->flc_flock_cnt, &dispose); + locks_delete_lock_ctx(fl, &dispose); break; } @@ -905,16 +901,6 @@ static int flock_lock_file(struct file *filp, struct file_lock *request) goto out; } - /* - * If a higher-priority process was blocked on the old file lock, - * give it the opportunity to lock the file. - */ - if (found) { - spin_unlock(&ctx->flc_lock); - cond_resched(); - spin_lock(&ctx->flc_lock); - } - find_conflict: list_for_each_entry(fl, &ctx->flc_flock, fl_list) { if (!flock_locks_conflict(request, fl)) @@ -929,7 +915,7 @@ static int flock_lock_file(struct file *filp, struct file_lock *request) if (request->fl_flags & FL_ACCESS) goto out; locks_copy_lock(new_fl, request); - locks_insert_lock_ctx(new_fl, &ctx->flc_flock_cnt, &ctx->flc_flock); + locks_insert_lock_ctx(new_fl, &ctx->flc_flock); new_fl = NULL; error = 0; @@ -1046,8 +1032,7 @@ static int __posix_lock_file(struct inode *inode, struct file_lock *request, str else request->fl_end = fl->fl_end; if (added) { - locks_delete_lock_ctx(fl, &ctx->flc_posix_cnt, - &dispose); + locks_delete_lock_ctx(fl, &dispose); continue; } request = fl; @@ -1076,8 +1061,7 @@ static int __posix_lock_file(struct inode *inode, struct file_lock *request, str * one (This may happen several times). */ if (added) { - locks_delete_lock_ctx(fl, - &ctx->flc_posix_cnt, &dispose); + locks_delete_lock_ctx(fl, &dispose); continue; } /* @@ -1093,10 +1077,8 @@ static int __posix_lock_file(struct inode *inode, struct file_lock *request, str locks_copy_lock(new_fl, request); request = new_fl; new_fl = NULL; - locks_insert_lock_ctx(request, - &ctx->flc_posix_cnt, &fl->fl_list); - locks_delete_lock_ctx(fl, - &ctx->flc_posix_cnt, &dispose); + locks_insert_lock_ctx(request, &fl->fl_list); + locks_delete_lock_ctx(fl, &dispose); added = true; } } @@ -1124,8 +1106,8 @@ static int __posix_lock_file(struct inode *inode, struct file_lock *request, str goto out; } locks_copy_lock(new_fl, request); - locks_insert_lock_ctx(new_fl, &ctx->flc_posix_cnt, - &fl->fl_list); + locks_insert_lock_ctx(new_fl, &fl->fl_list); + fl = new_fl; new_fl = NULL; } if (right) { @@ -1136,8 +1118,7 @@ static int __posix_lock_file(struct inode *inode, struct file_lock *request, str left = new_fl2; new_fl2 = NULL; locks_copy_lock(left, right); - locks_insert_lock_ctx(left, &ctx->flc_posix_cnt, - &fl->fl_list); + locks_insert_lock_ctx(left, &fl->fl_list); } right->fl_start = request->fl_end + 1; locks_wake_up_blocks(right); @@ -1321,7 +1302,6 @@ static void lease_clear_pending(struct file_lock *fl, int arg) /* We already had a lease on this file; just change its type */ int lease_modify(struct file_lock *fl, int arg, struct list_head *dispose) { - struct file_lock_context *flctx; int error = assign_type(fl, arg); if (error) @@ -1331,7 +1311,6 @@ int lease_modify(struct file_lock *fl, int arg, struct list_head *dispose) if (arg == F_UNLCK) { struct file *filp = fl->fl_file; - flctx = file_inode(filp)->i_flctx; f_delown(filp); filp->f_owner.signum = 0; fasync_helper(0, fl->fl_file, 0, &fl->fl_fasync); @@ -1339,7 +1318,7 @@ int lease_modify(struct file_lock *fl, int arg, struct list_head *dispose) printk(KERN_ERR "locks_delete_lock: fasync == %p\n", fl->fl_fasync); fl->fl_fasync = NULL; } - locks_delete_lock_ctx(fl, &flctx->flc_lease_cnt, dispose); + locks_delete_lock_ctx(fl, dispose); } return 0; } @@ -1456,8 +1435,7 @@ int __break_lease(struct inode *inode, unsigned int mode, unsigned int type) fl->fl_downgrade_time = break_time; } if (fl->fl_lmops->lm_break(fl)) - locks_delete_lock_ctx(fl, &ctx->flc_lease_cnt, - &dispose); + locks_delete_lock_ctx(fl, &dispose); } if (list_empty(&ctx->flc_lease)) @@ -1697,7 +1675,7 @@ generic_add_lease(struct file *filp, long arg, struct file_lock **flp, void **pr if (!leases_enable) goto out; - locks_insert_lock_ctx(lease, &ctx->flc_lease_cnt, &ctx->flc_lease); + locks_insert_lock_ctx(lease, &ctx->flc_lease); /* * The check in break_lease() is lockless. It's possible for another * open to race in after we did the earlier check for a conflicting @@ -1710,7 +1688,7 @@ generic_add_lease(struct file *filp, long arg, struct file_lock **flp, void **pr smp_mb(); error = check_conflicting_open(dentry, arg, lease->fl_flags); if (error) { - locks_unlink_lock_ctx(lease, &ctx->flc_lease_cnt); + locks_unlink_lock_ctx(lease); goto out; } @@ -2448,7 +2426,8 @@ locks_remove_lease(struct file *filp) spin_lock(&ctx->flc_lock); list_for_each_entry_safe(fl, tmp, &ctx->flc_lease, fl_list) - lease_modify(fl, F_UNLCK, &dispose); + if (filp == fl->fl_file) + lease_modify(fl, F_UNLCK, &dispose); spin_unlock(&ctx->flc_lock); locks_dispose_list(&dispose); } diff --git a/include/linux/fs.h b/include/linux/fs.h index 447932aed1e194d7e258bd632bd69eee5d040c8e..b4d71b5e1ff23a2d3f3ec5c481937edd571ead4d 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -968,9 +968,6 @@ struct file_lock_context { struct list_head flc_flock; struct list_head flc_posix; struct list_head flc_lease; - int flc_flock_cnt; - int flc_posix_cnt; - int flc_lease_cnt; }; /* The following constant reflects the upper bound of the file/locking space */