diff options
| -rw-r--r-- | fs/inode.c | 46 | ||||
| -rw-r--r-- | fs/internal.h | 1 | ||||
| -rw-r--r-- | fs/notify/inode_mark.c | 2 | ||||
| -rw-r--r-- | fs/super.c | 8 |
4 files changed, 51 insertions, 6 deletions
@@ -478,6 +478,49 @@ static void dispose_list(struct list_head *head) } /** + * evict_inodes - evict all evictable inodes for a superblock + * @sb: superblock to operate on + * + * Make sure that no inodes with zero refcount are retained. This is + * called by superblock shutdown after having MS_ACTIVE flag removed, + * so any inode reaching zero refcount during or after that call will + * be immediately evicted. + */ +void evict_inodes(struct super_block *sb) +{ + struct inode *inode, *next; + LIST_HEAD(dispose); + + down_write(&iprune_sem); + + spin_lock(&inode_lock); + list_for_each_entry_safe(inode, next, &sb->s_inodes, i_sb_list) { + if (atomic_read(&inode->i_count)) + continue; + + if (inode->i_state & (I_NEW | I_FREEING | I_WILL_FREE)) { + WARN_ON(1); + continue; + } + + inode->i_state |= I_FREEING; + + /* + * Move the inode off the IO lists and LRU once I_FREEING is + * set so that it won't get moved back on there if it is dirty. + */ + list_move(&inode->i_lru, &dispose); + list_del_init(&inode->i_wb_list); + if (!(inode->i_state & (I_DIRTY | I_SYNC))) + percpu_counter_dec(&nr_inodes_unused); + } + spin_unlock(&inode_lock); + + dispose_list(&dispose); + up_write(&iprune_sem); +} + +/** * invalidate_inodes - attempt to free all inodes on a superblock * @sb: superblock to operate on * @@ -493,9 +536,8 @@ int invalidate_inodes(struct super_block *sb) down_write(&iprune_sem); spin_lock(&inode_lock); - fsnotify_unmount_inodes(&sb->s_inodes); list_for_each_entry_safe(inode, next, &sb->s_inodes, i_sb_list) { - if (inode->i_state & I_NEW) + if (inode->i_state & (I_NEW | I_FREEING | I_WILL_FREE)) continue; if (atomic_read(&inode->i_count)) { busy = 1; diff --git a/fs/internal.h b/fs/internal.h index 4cc67eb..ebad3b9 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -106,4 +106,5 @@ extern void release_open_intent(struct nameidata *); * inode.c */ extern int get_nr_dirty_inodes(void); +extern int evict_inodes(struct super_block *); extern int invalidate_inodes(struct super_block *); diff --git a/fs/notify/inode_mark.c b/fs/notify/inode_mark.c index 33297c0..21ed106 100644 --- a/fs/notify/inode_mark.c +++ b/fs/notify/inode_mark.c @@ -240,6 +240,7 @@ void fsnotify_unmount_inodes(struct list_head *list) { struct inode *inode, *next_i, *need_iput = NULL; + spin_lock(&inode_lock); list_for_each_entry_safe(inode, next_i, list, i_sb_list) { struct inode *need_iput_tmp; @@ -297,4 +298,5 @@ void fsnotify_unmount_inodes(struct list_head *list) spin_lock(&inode_lock); } + spin_unlock(&inode_lock); } @@ -273,14 +273,14 @@ void generic_shutdown_super(struct super_block *sb) get_fs_excl(); sb->s_flags &= ~MS_ACTIVE; - /* bad name - it should be evict_inodes() */ - invalidate_inodes(sb); + fsnotify_unmount_inodes(&sb->s_inodes); + + evict_inodes(sb); if (sop->put_super) sop->put_super(sb); - /* Forget any remaining inodes */ - if (invalidate_inodes(sb)) { + if (!list_empty(&sb->s_inodes)) { printk("VFS: Busy inodes after unmount of %s. " "Self-destruct in 5 seconds. Have a nice day...\n", sb->s_id); |
