Lines Matching refs:sb
58 struct super_block *sb; in super_cache_scan() local
65 sb = container_of(shrink, struct super_block, s_shrink); in super_cache_scan()
74 if (!trylock_super(sb)) in super_cache_scan()
77 if (sb->s_op->nr_cached_objects) in super_cache_scan()
78 fs_objects = sb->s_op->nr_cached_objects(sb, sc); in super_cache_scan()
80 inodes = list_lru_shrink_count(&sb->s_inode_lru, sc); in super_cache_scan()
81 dentries = list_lru_shrink_count(&sb->s_dentry_lru, sc); in super_cache_scan()
99 freed = prune_dcache_sb(sb, sc); in super_cache_scan()
101 freed += prune_icache_sb(sb, sc); in super_cache_scan()
105 freed += sb->s_op->free_cached_objects(sb, sc); in super_cache_scan()
108 up_read(&sb->s_umount); in super_cache_scan()
115 struct super_block *sb; in super_cache_count() local
118 sb = container_of(shrink, struct super_block, s_shrink); in super_cache_count()
128 if (sb->s_op && sb->s_op->nr_cached_objects) in super_cache_count()
129 total_objects = sb->s_op->nr_cached_objects(sb, sc); in super_cache_count()
131 total_objects += list_lru_shrink_count(&sb->s_dentry_lru, sc); in super_cache_count()
132 total_objects += list_lru_shrink_count(&sb->s_inode_lru, sc); in super_cache_count()
261 static void __put_super(struct super_block *sb) in __put_super() argument
263 if (!--sb->s_count) { in __put_super()
264 list_del_init(&sb->s_list); in __put_super()
265 destroy_super(sb); in __put_super()
276 static void put_super(struct super_block *sb) in put_super() argument
279 __put_super(sb); in put_super()
382 bool trylock_super(struct super_block *sb) in trylock_super() argument
384 if (down_read_trylock(&sb->s_umount)) { in trylock_super()
385 if (!hlist_unhashed(&sb->s_instances) && in trylock_super()
386 sb->s_root && (sb->s_flags & MS_BORN)) in trylock_super()
388 up_read(&sb->s_umount); in trylock_super()
408 void generic_shutdown_super(struct super_block *sb) in generic_shutdown_super() argument
410 const struct super_operations *sop = sb->s_op; in generic_shutdown_super()
412 if (sb->s_root) { in generic_shutdown_super()
413 shrink_dcache_for_umount(sb); in generic_shutdown_super()
414 sync_filesystem(sb); in generic_shutdown_super()
415 sb->s_flags &= ~MS_ACTIVE; in generic_shutdown_super()
417 fsnotify_unmount_inodes(sb); in generic_shutdown_super()
420 evict_inodes(sb); in generic_shutdown_super()
422 if (sb->s_dio_done_wq) { in generic_shutdown_super()
423 destroy_workqueue(sb->s_dio_done_wq); in generic_shutdown_super()
424 sb->s_dio_done_wq = NULL; in generic_shutdown_super()
428 sop->put_super(sb); in generic_shutdown_super()
430 if (!list_empty(&sb->s_inodes)) { in generic_shutdown_super()
433 sb->s_id); in generic_shutdown_super()
438 hlist_del_init(&sb->s_instances); in generic_shutdown_super()
440 up_write(&sb->s_umount); in generic_shutdown_super()
506 void drop_super(struct super_block *sb) in drop_super() argument
508 up_read(&sb->s_umount); in drop_super()
509 put_super(sb); in drop_super()
524 struct super_block *sb, *p = NULL; in iterate_supers() local
527 list_for_each_entry(sb, &super_blocks, s_list) { in iterate_supers()
528 if (hlist_unhashed(&sb->s_instances)) in iterate_supers()
530 sb->s_count++; in iterate_supers()
533 down_read(&sb->s_umount); in iterate_supers()
534 if (sb->s_root && (sb->s_flags & MS_BORN)) in iterate_supers()
535 f(sb, arg); in iterate_supers()
536 up_read(&sb->s_umount); in iterate_supers()
541 p = sb; in iterate_supers()
560 struct super_block *sb, *p = NULL; in iterate_supers_type() local
563 hlist_for_each_entry(sb, &type->fs_supers, s_instances) { in iterate_supers_type()
564 sb->s_count++; in iterate_supers_type()
567 down_read(&sb->s_umount); in iterate_supers_type()
568 if (sb->s_root && (sb->s_flags & MS_BORN)) in iterate_supers_type()
569 f(sb, arg); in iterate_supers_type()
570 up_read(&sb->s_umount); in iterate_supers_type()
575 p = sb; in iterate_supers_type()
594 struct super_block *sb; in get_super() local
601 list_for_each_entry(sb, &super_blocks, s_list) { in get_super()
602 if (hlist_unhashed(&sb->s_instances)) in get_super()
604 if (sb->s_bdev == bdev) { in get_super()
605 sb->s_count++; in get_super()
607 down_read(&sb->s_umount); in get_super()
609 if (sb->s_root && (sb->s_flags & MS_BORN)) in get_super()
610 return sb; in get_super()
611 up_read(&sb->s_umount); in get_super()
614 __put_super(sb); in get_super()
657 struct super_block *sb; in get_active_super() local
664 list_for_each_entry(sb, &super_blocks, s_list) { in get_active_super()
665 if (hlist_unhashed(&sb->s_instances)) in get_active_super()
667 if (sb->s_bdev == bdev) { in get_active_super()
668 if (!grab_super(sb)) in get_active_super()
670 up_write(&sb->s_umount); in get_active_super()
671 return sb; in get_active_super()
680 struct super_block *sb; in user_get_super() local
684 list_for_each_entry(sb, &super_blocks, s_list) { in user_get_super()
685 if (hlist_unhashed(&sb->s_instances)) in user_get_super()
687 if (sb->s_dev == dev) { in user_get_super()
688 sb->s_count++; in user_get_super()
690 down_read(&sb->s_umount); in user_get_super()
692 if (sb->s_root && (sb->s_flags & MS_BORN)) in user_get_super()
693 return sb; in user_get_super()
694 up_read(&sb->s_umount); in user_get_super()
697 __put_super(sb); in user_get_super()
714 int do_remount_sb(struct super_block *sb, int flags, void *data, int force) in do_remount_sb() argument
719 if (sb->s_writers.frozen != SB_UNFROZEN) in do_remount_sb()
723 if (!(flags & MS_RDONLY) && bdev_read_only(sb->s_bdev)) in do_remount_sb()
727 remount_ro = (flags & MS_RDONLY) && !(sb->s_flags & MS_RDONLY); in do_remount_sb()
730 if (!hlist_empty(&sb->s_pins)) { in do_remount_sb()
731 up_write(&sb->s_umount); in do_remount_sb()
732 group_pin_kill(&sb->s_pins); in do_remount_sb()
733 down_write(&sb->s_umount); in do_remount_sb()
734 if (!sb->s_root) in do_remount_sb()
736 if (sb->s_writers.frozen != SB_UNFROZEN) in do_remount_sb()
738 remount_ro = (flags & MS_RDONLY) && !(sb->s_flags & MS_RDONLY); in do_remount_sb()
741 shrink_dcache_sb(sb); in do_remount_sb()
747 sb->s_readonly_remount = 1; in do_remount_sb()
750 retval = sb_prepare_remount_readonly(sb); in do_remount_sb()
756 if (sb->s_op->remount_fs) { in do_remount_sb()
757 retval = sb->s_op->remount_fs(sb, &flags, data); in do_remount_sb()
763 sb->s_type->name, retval); in do_remount_sb()
766 sb->s_flags = (sb->s_flags & ~MS_RMT_MASK) | (flags & MS_RMT_MASK); in do_remount_sb()
769 sb->s_readonly_remount = 0; in do_remount_sb()
779 if (remount_ro && sb->s_bdev) in do_remount_sb()
780 invalidate_bdev(sb->s_bdev); in do_remount_sb()
784 sb->s_readonly_remount = 0; in do_remount_sb()
790 struct super_block *sb, *p = NULL; in do_emergency_remount() local
793 list_for_each_entry(sb, &super_blocks, s_list) { in do_emergency_remount()
794 if (hlist_unhashed(&sb->s_instances)) in do_emergency_remount()
796 sb->s_count++; in do_emergency_remount()
798 down_write(&sb->s_umount); in do_emergency_remount()
799 if (sb->s_root && sb->s_bdev && (sb->s_flags & MS_BORN) && in do_emergency_remount()
800 !(sb->s_flags & MS_RDONLY)) { in do_emergency_remount()
804 do_remount_sb(sb, MS_RDONLY, NULL, 1); in do_emergency_remount()
806 up_write(&sb->s_umount); in do_emergency_remount()
810 p = sb; in do_emergency_remount()
892 void kill_anon_super(struct super_block *sb) in kill_anon_super() argument
894 dev_t dev = sb->s_dev; in kill_anon_super()
895 generic_shutdown_super(sb); in kill_anon_super()
901 void kill_litter_super(struct super_block *sb) in kill_litter_super() argument
903 if (sb->s_root) in kill_litter_super()
904 d_genocide(sb->s_root); in kill_litter_super()
905 kill_anon_super(sb); in kill_litter_super()
910 static int ns_test_super(struct super_block *sb, void *data) in ns_test_super() argument
912 return sb->s_fs_info == data; in ns_test_super()
915 static int ns_set_super(struct super_block *sb, void *data) in ns_set_super() argument
917 sb->s_fs_info = data; in ns_set_super()
918 return set_anon_super(sb, NULL); in ns_set_super()
924 struct super_block *sb; in mount_ns() local
926 sb = sget(fs_type, ns_test_super, ns_set_super, flags, data); in mount_ns()
927 if (IS_ERR(sb)) in mount_ns()
928 return ERR_CAST(sb); in mount_ns()
930 if (!sb->s_root) { in mount_ns()
932 err = fill_super(sb, data, flags & MS_SILENT ? 1 : 0); in mount_ns()
934 deactivate_locked_super(sb); in mount_ns()
938 sb->s_flags |= MS_ACTIVE; in mount_ns()
941 return dget(sb->s_root); in mount_ns()
1042 void kill_block_super(struct super_block *sb) in kill_block_super() argument
1044 struct block_device *bdev = sb->s_bdev; in kill_block_super()
1045 fmode_t mode = sb->s_mode; in kill_block_super()
1048 generic_shutdown_super(sb); in kill_block_super()
1110 struct super_block *sb; in mount_fs() local
1129 sb = root->d_sb; in mount_fs()
1130 BUG_ON(!sb); in mount_fs()
1131 WARN_ON(!sb->s_bdi); in mount_fs()
1132 sb->s_flags |= MS_BORN; in mount_fs()
1134 error = security_sb_kern_mount(sb, flags, secdata); in mount_fs()
1144 WARN((sb->s_maxbytes < 0), "%s set sb->s_maxbytes to " in mount_fs()
1145 "negative value (%lld)\n", type->name, sb->s_maxbytes); in mount_fs()
1147 up_write(&sb->s_umount); in mount_fs()
1152 deactivate_locked_super(sb); in mount_fs()
1163 void __sb_end_write(struct super_block *sb, int level) in __sb_end_write() argument
1165 percpu_up_read(sb->s_writers.rw_sem + level-1); in __sb_end_write()
1173 int __sb_start_write(struct super_block *sb, int level, bool wait) in __sb_start_write() argument
1192 if (percpu_rwsem_is_held(sb->s_writers.rw_sem + i)) { in __sb_start_write()
1199 percpu_down_read(sb->s_writers.rw_sem + level-1); in __sb_start_write()
1201 ret = percpu_down_read_trylock(sb->s_writers.rw_sem + level-1); in __sb_start_write()
1216 static void sb_wait_write(struct super_block *sb, int level) in sb_wait_write() argument
1218 percpu_down_write(sb->s_writers.rw_sem + level-1); in sb_wait_write()
1229 percpu_rwsem_release(sb->s_writers.rw_sem + level-1, 0, _THIS_IP_); in sb_wait_write()
1232 static void sb_freeze_unlock(struct super_block *sb) in sb_freeze_unlock() argument
1237 percpu_rwsem_acquire(sb->s_writers.rw_sem + level, 0, _THIS_IP_); in sb_freeze_unlock()
1240 percpu_up_write(sb->s_writers.rw_sem + level); in sb_freeze_unlock()
1276 int freeze_super(struct super_block *sb) in freeze_super() argument
1280 atomic_inc(&sb->s_active); in freeze_super()
1281 down_write(&sb->s_umount); in freeze_super()
1282 if (sb->s_writers.frozen != SB_UNFROZEN) { in freeze_super()
1283 deactivate_locked_super(sb); in freeze_super()
1287 if (!(sb->s_flags & MS_BORN)) { in freeze_super()
1288 up_write(&sb->s_umount); in freeze_super()
1292 if (sb->s_flags & MS_RDONLY) { in freeze_super()
1294 sb->s_writers.frozen = SB_FREEZE_COMPLETE; in freeze_super()
1295 up_write(&sb->s_umount); in freeze_super()
1299 sb->s_writers.frozen = SB_FREEZE_WRITE; in freeze_super()
1301 up_write(&sb->s_umount); in freeze_super()
1302 sb_wait_write(sb, SB_FREEZE_WRITE); in freeze_super()
1303 down_write(&sb->s_umount); in freeze_super()
1306 sb->s_writers.frozen = SB_FREEZE_PAGEFAULT; in freeze_super()
1307 sb_wait_write(sb, SB_FREEZE_PAGEFAULT); in freeze_super()
1310 sync_filesystem(sb); in freeze_super()
1313 sb->s_writers.frozen = SB_FREEZE_FS; in freeze_super()
1314 sb_wait_write(sb, SB_FREEZE_FS); in freeze_super()
1316 if (sb->s_op->freeze_fs) { in freeze_super()
1317 ret = sb->s_op->freeze_fs(sb); in freeze_super()
1321 sb->s_writers.frozen = SB_UNFROZEN; in freeze_super()
1322 sb_freeze_unlock(sb); in freeze_super()
1323 wake_up(&sb->s_writers.wait_unfrozen); in freeze_super()
1324 deactivate_locked_super(sb); in freeze_super()
1332 sb->s_writers.frozen = SB_FREEZE_COMPLETE; in freeze_super()
1333 up_write(&sb->s_umount); in freeze_super()
1344 int thaw_super(struct super_block *sb) in thaw_super() argument
1348 down_write(&sb->s_umount); in thaw_super()
1349 if (sb->s_writers.frozen == SB_UNFROZEN) { in thaw_super()
1350 up_write(&sb->s_umount); in thaw_super()
1354 if (sb->s_flags & MS_RDONLY) { in thaw_super()
1355 sb->s_writers.frozen = SB_UNFROZEN; in thaw_super()
1359 if (sb->s_op->unfreeze_fs) { in thaw_super()
1360 error = sb->s_op->unfreeze_fs(sb); in thaw_super()
1364 up_write(&sb->s_umount); in thaw_super()
1369 sb->s_writers.frozen = SB_UNFROZEN; in thaw_super()
1370 sb_freeze_unlock(sb); in thaw_super()
1372 wake_up(&sb->s_writers.wait_unfrozen); in thaw_super()
1373 deactivate_locked_super(sb); in thaw_super()