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btrfs: use btrfs_find_first_inode() at btrfs_prune_dentries()

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Currently btrfs_prune_dentries() has open code to find the first inode in
a root with a minimum inode number. Remove that code and make it use the
helper btrfs_find_first_inode() for that task.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Filipe Manana 2024-04-11 12:45:34 +01:00 committed by David Sterba
parent 5e485ac6f0
commit 26c0fae3e7
1 changed files with 14 additions and 52 deletions
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66
fs/btrfs/inode.c
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@ -4416,64 +4416,26 @@ static noinline int may_destroy_subvol(struct btrfs_root *root)
static void btrfs_prune_dentries(struct btrfs_root *root)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct rb_node *node;
struct rb_node *prev;
struct btrfs_inode *entry;
struct inode *inode;
u64 objectid = 0;
struct btrfs_inode *inode;
u64 min_ino = 0;
if (!BTRFS_FS_ERROR(fs_info))
WARN_ON(btrfs_root_refs(&root->root_item) != 0);
spin_lock(&root->inode_lock);
again:
node = root->inode_tree.rb_node;
prev = NULL;
while (node) {
prev = node;
entry = rb_entry(node, struct btrfs_inode, rb_node);
inode = btrfs_find_first_inode(root, min_ino);
while (inode) {
if (atomic_read(&inode->vfs_inode.i_count) > 1)
d_prune_aliases(&inode->vfs_inode);
if (objectid < btrfs_ino(entry))
node = node->rb_left;
else if (objectid > btrfs_ino(entry))
node = node->rb_right;
else
break;
min_ino = btrfs_ino(inode) + 1;
/*
* btrfs_drop_inode() will have it removed from the inode
* cache when its usage count hits zero.
*/
iput(&inode->vfs_inode);
cond_resched();
inode = btrfs_find_first_inode(root, min_ino);
}
if (!node) {
while (prev) {
entry = rb_entry(prev, struct btrfs_inode, rb_node);
if (objectid <= btrfs_ino(entry)) {
node = prev;
break;
}
prev = rb_next(prev);
}
}
while (node) {
entry = rb_entry(node, struct btrfs_inode, rb_node);
objectid = btrfs_ino(entry) + 1;
inode = igrab(&entry->vfs_inode);
if (inode) {
spin_unlock(&root->inode_lock);
if (atomic_read(&inode->i_count) > 1)
d_prune_aliases(inode);
/*
* btrfs_drop_inode will have it removed from the inode
* cache when its usage count hits zero.
*/
iput(inode);
cond_resched();
spin_lock(&root->inode_lock);
goto again;
}
if (cond_resched_lock(&root->inode_lock))
goto again;
node = rb_next(node);
}
spin_unlock(&root->inode_lock);
}
int btrfs_delete_subvolume(struct btrfs_inode *dir, struct dentry *dentry)