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fs: fold invalidate_list into invalidate_inodes

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Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig 2010-10-24 19:40:33 +02:00 committed by Al Viro
parent d895a1c96a
commit a031878670
1 changed files with 16 additions and 27 deletions
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43
fs/inode.c
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@ -477,15 +477,24 @@ static void dispose_list(struct list_head *head)
}
}
/*
* Invalidate all inodes for a device.
/**
* invalidate_inodes - attempt to free all inodes on a superblock
* @sb: superblock to operate on
*
* Attempts to free all inodes for a given superblock. If there were any
* busy inodes return a non-zero value, else zero.
*/
static int invalidate_list(struct list_head *head, struct list_head *dispose)
int invalidate_inodes(struct super_block *sb)
{
struct inode *inode, *next;
int busy = 0;
struct inode *inode, *next;
LIST_HEAD(dispose);
list_for_each_entry_safe(inode, next, head, i_sb_list) {
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)
continue;
if (atomic_read(&inode->i_count)) {
@ -499,34 +508,14 @@ static int invalidate_list(struct list_head *head, struct list_head *dispose)
* 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_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);
}
return busy;
}
/**
* invalidate_inodes - discard the inodes on a device
* @sb: superblock
*
* Discard all of the inodes for a given superblock. If the discard
* fails because there are busy inodes then a non zero value is returned.
* If the discard is successful all the inodes have been discarded.
*/
int invalidate_inodes(struct super_block *sb)
{
int busy;
LIST_HEAD(throw_away);
down_write(&iprune_sem);
spin_lock(&inode_lock);
fsnotify_unmount_inodes(&sb->s_inodes);
busy = invalidate_list(&sb->s_inodes, &throw_away);
spin_unlock(&inode_lock);
dispose_list(&throw_away);
dispose_list(&dispose);
up_write(&iprune_sem);
return busy;