Lines Matching refs:sb
43 static int thaw_super_locked(struct super_block *sb);
64 struct super_block *sb; in super_cache_scan() local
71 sb = container_of(shrink, struct super_block, s_shrink); in super_cache_scan()
80 if (!trylock_super(sb)) in super_cache_scan()
83 if (sb->s_op->nr_cached_objects) in super_cache_scan()
84 fs_objects = sb->s_op->nr_cached_objects(sb, sc); in super_cache_scan()
86 inodes = list_lru_shrink_count(&sb->s_inode_lru, sc); in super_cache_scan()
87 dentries = list_lru_shrink_count(&sb->s_dentry_lru, sc); in super_cache_scan()
105 freed = prune_dcache_sb(sb, sc); in super_cache_scan()
107 freed += prune_icache_sb(sb, sc); in super_cache_scan()
111 freed += sb->s_op->free_cached_objects(sb, sc); in super_cache_scan()
114 up_read(&sb->s_umount); in super_cache_scan()
121 struct super_block *sb; in super_cache_count() local
124 sb = container_of(shrink, struct super_block, s_shrink); in super_cache_count()
140 if (!(sb->s_flags & SB_BORN)) in super_cache_count()
144 if (sb->s_op && sb->s_op->nr_cached_objects) in super_cache_count()
145 total_objects = sb->s_op->nr_cached_objects(sb, sc); in super_cache_count()
147 total_objects += list_lru_shrink_count(&sb->s_dentry_lru, sc); in super_cache_count()
148 total_objects += list_lru_shrink_count(&sb->s_inode_lru, sc); in super_cache_count()
310 void put_super(struct super_block *sb) in put_super() argument
313 __put_super(sb); in put_super()
416 bool trylock_super(struct super_block *sb) in trylock_super() argument
418 if (down_read_trylock(&sb->s_umount)) { in trylock_super()
419 if (!hlist_unhashed(&sb->s_instances) && in trylock_super()
420 sb->s_root && (sb->s_flags & SB_BORN)) in trylock_super()
422 up_read(&sb->s_umount); in trylock_super()
442 void generic_shutdown_super(struct super_block *sb) in generic_shutdown_super() argument
444 const struct super_operations *sop = sb->s_op; in generic_shutdown_super()
446 if (sb->s_root) { in generic_shutdown_super()
447 shrink_dcache_for_umount(sb); in generic_shutdown_super()
448 sync_filesystem(sb); in generic_shutdown_super()
449 sb->s_flags &= ~SB_ACTIVE; in generic_shutdown_super()
454 evict_inodes(sb); in generic_shutdown_super()
456 fsnotify_sb_delete(sb); in generic_shutdown_super()
457 security_sb_delete(sb); in generic_shutdown_super()
459 if (sb->s_dio_done_wq) { in generic_shutdown_super()
460 destroy_workqueue(sb->s_dio_done_wq); in generic_shutdown_super()
461 sb->s_dio_done_wq = NULL; in generic_shutdown_super()
465 sop->put_super(sb); in generic_shutdown_super()
467 if (!list_empty(&sb->s_inodes)) { in generic_shutdown_super()
470 sb->s_id); in generic_shutdown_super()
475 hlist_del_init(&sb->s_instances); in generic_shutdown_super()
477 up_write(&sb->s_umount); in generic_shutdown_super()
478 if (sb->s_bdi != &noop_backing_dev_info) { in generic_shutdown_super()
479 if (sb->s_iflags & SB_I_PERSB_BDI) in generic_shutdown_super()
480 bdi_unregister(sb->s_bdi); in generic_shutdown_super()
481 bdi_put(sb->s_bdi); in generic_shutdown_super()
482 sb->s_bdi = &noop_backing_dev_info; in generic_shutdown_super()
639 void drop_super(struct super_block *sb) in drop_super() argument
641 up_read(&sb->s_umount); in drop_super()
642 put_super(sb); in drop_super()
647 void drop_super_exclusive(struct super_block *sb) in drop_super_exclusive() argument
649 up_write(&sb->s_umount); in drop_super_exclusive()
650 put_super(sb); in drop_super_exclusive()
656 struct super_block *sb, *p = NULL; in __iterate_supers() local
659 list_for_each_entry(sb, &super_blocks, s_list) { in __iterate_supers()
660 if (hlist_unhashed(&sb->s_instances)) in __iterate_supers()
662 sb->s_count++; in __iterate_supers()
665 f(sb); in __iterate_supers()
670 p = sb; in __iterate_supers()
686 struct super_block *sb, *p = NULL; in iterate_supers() local
689 list_for_each_entry(sb, &super_blocks, s_list) { in iterate_supers()
690 if (hlist_unhashed(&sb->s_instances)) in iterate_supers()
692 sb->s_count++; in iterate_supers()
695 down_read(&sb->s_umount); in iterate_supers()
696 if (sb->s_root && (sb->s_flags & SB_BORN)) in iterate_supers()
697 f(sb, arg); in iterate_supers()
698 up_read(&sb->s_umount); in iterate_supers()
703 p = sb; in iterate_supers()
722 struct super_block *sb, *p = NULL; in iterate_supers_type() local
725 hlist_for_each_entry(sb, &type->fs_supers, s_instances) { in iterate_supers_type()
726 sb->s_count++; in iterate_supers_type()
729 down_read(&sb->s_umount); in iterate_supers_type()
730 if (sb->s_root && (sb->s_flags & SB_BORN)) in iterate_supers_type()
731 f(sb, arg); in iterate_supers_type()
732 up_read(&sb->s_umount); in iterate_supers_type()
737 p = sb; in iterate_supers_type()
755 struct super_block *sb; in get_super() local
762 list_for_each_entry(sb, &super_blocks, s_list) { in get_super()
763 if (hlist_unhashed(&sb->s_instances)) in get_super()
765 if (sb->s_bdev == bdev) { in get_super()
766 sb->s_count++; in get_super()
768 down_read(&sb->s_umount); in get_super()
770 if (sb->s_root && (sb->s_flags & SB_BORN)) in get_super()
771 return sb; in get_super()
772 up_read(&sb->s_umount); in get_super()
775 __put_super(sb); in get_super()
793 struct super_block *sb; in get_active_super() local
800 list_for_each_entry(sb, &super_blocks, s_list) { in get_active_super()
801 if (hlist_unhashed(&sb->s_instances)) in get_active_super()
803 if (sb->s_bdev == bdev) { in get_active_super()
804 if (!grab_super(sb)) in get_active_super()
806 up_write(&sb->s_umount); in get_active_super()
807 return sb; in get_active_super()
816 struct super_block *sb; in user_get_super() local
820 list_for_each_entry(sb, &super_blocks, s_list) { in user_get_super()
821 if (hlist_unhashed(&sb->s_instances)) in user_get_super()
823 if (sb->s_dev == dev) { in user_get_super()
824 sb->s_count++; in user_get_super()
827 down_write(&sb->s_umount); in user_get_super()
829 down_read(&sb->s_umount); in user_get_super()
831 if (sb->s_root && (sb->s_flags & SB_BORN)) in user_get_super()
832 return sb; in user_get_super()
834 up_write(&sb->s_umount); in user_get_super()
836 up_read(&sb->s_umount); in user_get_super()
839 __put_super(sb); in user_get_super()
855 struct super_block *sb = fc->root->d_sb; in reconfigure_super() local
862 if (sb->s_writers.frozen != SB_UNFROZEN) in reconfigure_super()
865 retval = security_sb_remount(sb, fc->security); in reconfigure_super()
871 if (!(fc->sb_flags & SB_RDONLY) && sb->s_bdev && in reconfigure_super()
872 bdev_read_only(sb->s_bdev)) in reconfigure_super()
876 remount_ro = (fc->sb_flags & SB_RDONLY) && !sb_rdonly(sb); in reconfigure_super()
880 if (!hlist_empty(&sb->s_pins)) { in reconfigure_super()
881 up_write(&sb->s_umount); in reconfigure_super()
882 group_pin_kill(&sb->s_pins); in reconfigure_super()
883 down_write(&sb->s_umount); in reconfigure_super()
884 if (!sb->s_root) in reconfigure_super()
886 if (sb->s_writers.frozen != SB_UNFROZEN) in reconfigure_super()
888 remount_ro = !sb_rdonly(sb); in reconfigure_super()
891 shrink_dcache_sb(sb); in reconfigure_super()
898 sb->s_readonly_remount = 1; in reconfigure_super()
901 retval = sb_prepare_remount_readonly(sb); in reconfigure_super()
914 sb->s_type->name, retval); in reconfigure_super()
918 WRITE_ONCE(sb->s_flags, ((sb->s_flags & ~fc->sb_flags_mask) | in reconfigure_super()
922 sb->s_readonly_remount = 0; in reconfigure_super()
932 if (remount_ro && sb->s_bdev) in reconfigure_super()
933 invalidate_bdev(sb->s_bdev); in reconfigure_super()
937 sb->s_readonly_remount = 0; in reconfigure_super()
941 static void do_emergency_remount_callback(struct super_block *sb) in do_emergency_remount_callback() argument
943 down_write(&sb->s_umount); in do_emergency_remount_callback()
944 if (sb->s_root && sb->s_bdev && (sb->s_flags & SB_BORN) && in do_emergency_remount_callback()
945 !sb_rdonly(sb)) { in do_emergency_remount_callback()
948 fc = fs_context_for_reconfigure(sb->s_root, in do_emergency_remount_callback()
956 up_write(&sb->s_umount); in do_emergency_remount_callback()
977 static void do_thaw_all_callback(struct super_block *sb) in do_thaw_all_callback() argument
979 down_write(&sb->s_umount); in do_thaw_all_callback()
980 if (sb->s_root && sb->s_flags & SB_BORN) { in do_thaw_all_callback()
981 emergency_thaw_bdev(sb); in do_thaw_all_callback()
982 thaw_super_locked(sb); in do_thaw_all_callback()
984 up_write(&sb->s_umount); in do_thaw_all_callback()
1056 void kill_anon_super(struct super_block *sb) in kill_anon_super() argument
1058 dev_t dev = sb->s_dev; in kill_anon_super()
1059 generic_shutdown_super(sb); in kill_anon_super()
1064 void kill_litter_super(struct super_block *sb) in kill_litter_super() argument
1066 if (sb->s_root) in kill_litter_super()
1067 d_genocide(sb->s_root); in kill_litter_super()
1068 kill_anon_super(sb); in kill_litter_super()
1072 int set_anon_super_fc(struct super_block *sb, struct fs_context *fc) in set_anon_super_fc() argument
1074 return set_anon_super(sb, NULL); in set_anon_super_fc()
1078 static int test_keyed_super(struct super_block *sb, struct fs_context *fc) in test_keyed_super() argument
1080 return sb->s_fs_info == fc->s_fs_info; in test_keyed_super()
1115 int (*fill_super)(struct super_block *sb, in vfs_get_super() argument
1119 struct super_block *sb; in vfs_get_super() local
1137 sb = sget_fc(fc, test, set_anon_super_fc); in vfs_get_super()
1138 if (IS_ERR(sb)) in vfs_get_super()
1139 return PTR_ERR(sb); in vfs_get_super()
1141 if (!sb->s_root) { in vfs_get_super()
1142 err = fill_super(sb, fc); in vfs_get_super()
1146 sb->s_flags |= SB_ACTIVE; in vfs_get_super()
1147 fc->root = dget(sb->s_root); in vfs_get_super()
1149 fc->root = dget(sb->s_root); in vfs_get_super()
1163 deactivate_locked_super(sb); in vfs_get_super()
1169 int (*fill_super)(struct super_block *sb, in get_tree_nodev() argument
1177 int (*fill_super)(struct super_block *sb, in get_tree_single() argument
1185 int (*fill_super)(struct super_block *sb, in get_tree_single_reconf() argument
1193 int (*fill_super)(struct super_block *sb, in get_tree_keyed() argument
1391 void kill_block_super(struct super_block *sb) in kill_block_super() argument
1393 struct block_device *bdev = sb->s_bdev; in kill_block_super()
1394 fmode_t mode = sb->s_mode; in kill_block_super()
1397 generic_shutdown_super(sb); in kill_block_super()
1491 struct super_block *sb; in vfs_get_tree() local
1513 sb = fc->root->d_sb; in vfs_get_tree()
1514 WARN_ON(!sb->s_bdi); in vfs_get_tree()
1523 sb->s_flags |= SB_BORN; in vfs_get_tree()
1525 error = security_sb_set_mnt_opts(sb, fc->security, 0, NULL); in vfs_get_tree()
1537 WARN((sb->s_maxbytes < 0), "%s set sb->s_maxbytes to " in vfs_get_tree()
1538 "negative value (%lld)\n", fc->fs_type->name, sb->s_maxbytes); in vfs_get_tree()
1548 int super_setup_bdi_name(struct super_block *sb, char *fmt, ...) in super_setup_bdi_name() argument
1565 WARN_ON(sb->s_bdi != &noop_backing_dev_info); in super_setup_bdi_name()
1566 sb->s_bdi = bdi; in super_setup_bdi_name()
1567 sb->s_iflags |= SB_I_PERSB_BDI; in super_setup_bdi_name()
1577 int super_setup_bdi(struct super_block *sb) in super_setup_bdi() argument
1581 return super_setup_bdi_name(sb, "%.28s-%ld", sb->s_type->name, in super_setup_bdi()
1594 static void sb_wait_write(struct super_block *sb, int level) in sb_wait_write() argument
1596 percpu_down_write(sb->s_writers.rw_sem + level-1); in sb_wait_write()
1603 static void lockdep_sb_freeze_release(struct super_block *sb) in lockdep_sb_freeze_release() argument
1608 percpu_rwsem_release(sb->s_writers.rw_sem + level, 0, _THIS_IP_); in lockdep_sb_freeze_release()
1614 static void lockdep_sb_freeze_acquire(struct super_block *sb) in lockdep_sb_freeze_acquire() argument
1619 percpu_rwsem_acquire(sb->s_writers.rw_sem + level, 0, _THIS_IP_); in lockdep_sb_freeze_acquire()
1622 static void sb_freeze_unlock(struct super_block *sb) in sb_freeze_unlock() argument
1627 percpu_up_write(sb->s_writers.rw_sem + level); in sb_freeze_unlock()
1663 int freeze_super(struct super_block *sb) in freeze_super() argument
1667 atomic_inc(&sb->s_active); in freeze_super()
1668 down_write(&sb->s_umount); in freeze_super()
1669 if (sb->s_writers.frozen != SB_UNFROZEN) { in freeze_super()
1670 deactivate_locked_super(sb); in freeze_super()
1674 if (!(sb->s_flags & SB_BORN)) { in freeze_super()
1675 up_write(&sb->s_umount); in freeze_super()
1679 if (sb_rdonly(sb)) { in freeze_super()
1681 sb->s_writers.frozen = SB_FREEZE_COMPLETE; in freeze_super()
1682 up_write(&sb->s_umount); in freeze_super()
1686 sb->s_writers.frozen = SB_FREEZE_WRITE; in freeze_super()
1688 up_write(&sb->s_umount); in freeze_super()
1689 sb_wait_write(sb, SB_FREEZE_WRITE); in freeze_super()
1690 down_write(&sb->s_umount); in freeze_super()
1693 sb->s_writers.frozen = SB_FREEZE_PAGEFAULT; in freeze_super()
1694 sb_wait_write(sb, SB_FREEZE_PAGEFAULT); in freeze_super()
1697 sync_filesystem(sb); in freeze_super()
1700 sb->s_writers.frozen = SB_FREEZE_FS; in freeze_super()
1701 sb_wait_write(sb, SB_FREEZE_FS); in freeze_super()
1703 if (sb->s_op->freeze_fs) { in freeze_super()
1704 ret = sb->s_op->freeze_fs(sb); in freeze_super()
1708 sb->s_writers.frozen = SB_UNFROZEN; in freeze_super()
1709 sb_freeze_unlock(sb); in freeze_super()
1710 wake_up(&sb->s_writers.wait_unfrozen); in freeze_super()
1711 deactivate_locked_super(sb); in freeze_super()
1719 sb->s_writers.frozen = SB_FREEZE_COMPLETE; in freeze_super()
1720 lockdep_sb_freeze_release(sb); in freeze_super()
1721 up_write(&sb->s_umount); in freeze_super()
1726 static int thaw_super_locked(struct super_block *sb) in thaw_super_locked() argument
1730 if (sb->s_writers.frozen != SB_FREEZE_COMPLETE) { in thaw_super_locked()
1731 up_write(&sb->s_umount); in thaw_super_locked()
1735 if (sb_rdonly(sb)) { in thaw_super_locked()
1736 sb->s_writers.frozen = SB_UNFROZEN; in thaw_super_locked()
1740 lockdep_sb_freeze_acquire(sb); in thaw_super_locked()
1742 if (sb->s_op->unfreeze_fs) { in thaw_super_locked()
1743 error = sb->s_op->unfreeze_fs(sb); in thaw_super_locked()
1747 lockdep_sb_freeze_release(sb); in thaw_super_locked()
1748 up_write(&sb->s_umount); in thaw_super_locked()
1753 sb->s_writers.frozen = SB_UNFROZEN; in thaw_super_locked()
1754 sb_freeze_unlock(sb); in thaw_super_locked()
1756 wake_up(&sb->s_writers.wait_unfrozen); in thaw_super_locked()
1757 deactivate_locked_super(sb); in thaw_super_locked()
1767 int thaw_super(struct super_block *sb) in thaw_super() argument
1769 down_write(&sb->s_umount); in thaw_super()
1770 return thaw_super_locked(sb); in thaw_super()