X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=fs%2Flocks.c;h=703f545097de714d26e6e6d60a0dd9b831060da8;hb=c04ea8ae99d71182b525cb8e4d48dc2fde0dd0ee;hp=b286539d547a5a11db6760688fcc8f1a37360ec3;hpb=3d071cd313643cf82b1ce1ce4fdf08d63ad53964;p=~andy%2Flinux diff --git a/fs/locks.c b/fs/locks.c index b286539d547..703f545097d 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -160,26 +160,20 @@ EXPORT_SYMBOL_GPL(unlock_flocks); static struct kmem_cache *filelock_cache __read_mostly; -static void locks_init_lock_always(struct file_lock *fl) +static void locks_init_lock_heads(struct file_lock *fl) { - fl->fl_next = NULL; - fl->fl_fasync = NULL; - fl->fl_owner = NULL; - fl->fl_pid = 0; - fl->fl_nspid = NULL; - fl->fl_file = NULL; - fl->fl_flags = 0; - fl->fl_type = 0; - fl->fl_start = fl->fl_end = 0; + INIT_LIST_HEAD(&fl->fl_link); + INIT_LIST_HEAD(&fl->fl_block); + init_waitqueue_head(&fl->fl_wait); } /* Allocate an empty lock structure. */ struct file_lock *locks_alloc_lock(void) { - struct file_lock *fl = kmem_cache_alloc(filelock_cache, GFP_KERNEL); + struct file_lock *fl = kmem_cache_zalloc(filelock_cache, GFP_KERNEL); if (fl) - locks_init_lock_always(fl); + locks_init_lock_heads(fl); return fl; } @@ -193,8 +187,8 @@ void locks_release_private(struct file_lock *fl) fl->fl_ops = NULL; } if (fl->fl_lmops) { - if (fl->fl_lmops->fl_release_private) - fl->fl_lmops->fl_release_private(fl); + if (fl->fl_lmops->lm_release_private) + fl->fl_lmops->lm_release_private(fl); fl->fl_lmops = NULL; } @@ -215,27 +209,12 @@ EXPORT_SYMBOL(locks_free_lock); void locks_init_lock(struct file_lock *fl) { - INIT_LIST_HEAD(&fl->fl_link); - INIT_LIST_HEAD(&fl->fl_block); - init_waitqueue_head(&fl->fl_wait); - fl->fl_ops = NULL; - fl->fl_lmops = NULL; - locks_init_lock_always(fl); + memset(fl, 0, sizeof(struct file_lock)); + locks_init_lock_heads(fl); } EXPORT_SYMBOL(locks_init_lock); -/* - * Initialises the fields of the file lock which are invariant for - * free file_locks. - */ -static void init_once(void *foo) -{ - struct file_lock *lock = (struct file_lock *) foo; - - locks_init_lock(lock); -} - static void locks_copy_private(struct file_lock *new, struct file_lock *fl) { if (fl->fl_ops) { @@ -444,9 +423,9 @@ static void lease_release_private_callback(struct file_lock *fl) } static const struct lock_manager_operations lease_manager_ops = { - .fl_break = lease_break_callback, - .fl_release_private = lease_release_private_callback, - .fl_change = lease_modify, + .lm_break = lease_break_callback, + .lm_release_private = lease_release_private_callback, + .lm_change = lease_modify, }; /* @@ -499,9 +478,9 @@ static inline int locks_overlap(struct file_lock *fl1, struct file_lock *fl2) */ static int posix_same_owner(struct file_lock *fl1, struct file_lock *fl2) { - if (fl1->fl_lmops && fl1->fl_lmops->fl_compare_owner) + if (fl1->fl_lmops && fl1->fl_lmops->lm_compare_owner) return fl2->fl_lmops == fl1->fl_lmops && - fl1->fl_lmops->fl_compare_owner(fl1, fl2); + fl1->fl_lmops->lm_compare_owner(fl1, fl2); return fl1->fl_owner == fl2->fl_owner; } @@ -551,8 +530,8 @@ static void locks_wake_up_blocks(struct file_lock *blocker) waiter = list_first_entry(&blocker->fl_block, struct file_lock, fl_block); __locks_delete_block(waiter); - if (waiter->fl_lmops && waiter->fl_lmops->fl_notify) - waiter->fl_lmops->fl_notify(waiter); + if (waiter->fl_lmops && waiter->fl_lmops->lm_notify) + waiter->fl_lmops->lm_notify(waiter); else wake_up(&waiter->fl_wait); } @@ -1239,7 +1218,7 @@ int __break_lease(struct inode *inode, unsigned int mode) fl->fl_type = future; fl->fl_break_time = break_time; /* lease must have lmops break callback */ - fl->fl_lmops->fl_break(fl); + fl->fl_lmops->lm_break(fl); } } @@ -1349,7 +1328,7 @@ int fcntl_getlease(struct file *filp) * @arg: type of lease to obtain * @flp: input - file_lock to use, output - file_lock inserted * - * The (input) flp->fl_lmops->fl_break function is required + * The (input) flp->fl_lmops->lm_break function is required * by break_lease(). * * Called with file_lock_lock held. @@ -1375,7 +1354,7 @@ int generic_setlease(struct file *filp, long arg, struct file_lock **flp) time_out_leases(inode); - BUG_ON(!(*flp)->fl_lmops->fl_break); + BUG_ON(!(*flp)->fl_lmops->lm_break); if (arg != F_UNLCK) { error = -EAGAIN; @@ -1417,7 +1396,7 @@ int generic_setlease(struct file *filp, long arg, struct file_lock **flp) goto out; if (my_before != NULL) { - error = lease->fl_lmops->fl_change(my_before, arg); + error = lease->fl_lmops->lm_change(my_before, arg); if (!error) *flp = *my_before; goto out; @@ -1453,7 +1432,7 @@ static int __vfs_setlease(struct file *filp, long arg, struct file_lock **lease) * @lease: file_lock to use * * Call this to establish a lease on the file. - * The (*lease)->fl_lmops->fl_break operation must be set; if not, + * The (*lease)->fl_lmops->lm_break operation must be set; if not, * break_lease will oops! * * This will call the filesystem's setlease file method, if @@ -1751,10 +1730,10 @@ out: * To avoid blocking kernel daemons, such as lockd, that need to acquire POSIX * locks, the ->lock() interface may return asynchronously, before the lock has * been granted or denied by the underlying filesystem, if (and only if) - * fl_grant is set. Callers expecting ->lock() to return asynchronously + * lm_grant is set. Callers expecting ->lock() to return asynchronously * will only use F_SETLK, not F_SETLKW; they will set FL_SLEEP if (and only if) * the request is for a blocking lock. When ->lock() does return asynchronously, - * it must return FILE_LOCK_DEFERRED, and call ->fl_grant() when the lock + * it must return FILE_LOCK_DEFERRED, and call ->lm_grant() when the lock * request completes. * If the request is for non-blocking lock the file system should return * FILE_LOCK_DEFERRED then try to get the lock and call the callback routine @@ -1764,7 +1743,7 @@ out: * grants a lock so the VFS can find out which locks are locally held and do * the correct lock cleanup when required. * The underlying filesystem must not drop the kernel lock or call - * ->fl_grant() before returning to the caller with a FILE_LOCK_DEFERRED + * ->lm_grant() before returning to the caller with a FILE_LOCK_DEFERRED * return code. */ int vfs_lock_file(struct file *filp, unsigned int cmd, struct file_lock *fl, struct file_lock *conf) @@ -2333,8 +2312,8 @@ EXPORT_SYMBOL(lock_may_write); static int __init filelock_init(void) { filelock_cache = kmem_cache_create("file_lock_cache", - sizeof(struct file_lock), 0, SLAB_PANIC, - init_once); + sizeof(struct file_lock), 0, SLAB_PANIC, NULL); + return 0; }