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btrfs: unify overwrite_item() and do_overwrite_item()

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After commit 193df62457 ("btrfs: search for last logged dir index if
it's not cached in the inode"), there are no more callers of
do_overwrite_item(), except overwrite_item().

Originally both used to be the same function, but were split in
commit 086dcbfa50 ("btrfs: insert items in batches when logging a
directory when possible"), as there was the need to execute all logic
of overwrite_item() but skip the tree search, since in the context of
directory logging we already had a path with a leaf to copy data from.

So unify them again as there is no more need to have them split.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Filipe Manana 2022-11-21 10:23:23 +00:00 committed by David Sterba
parent 63d5429f68
commit 3a8d1db341
1 changed files with 24 additions and 52 deletions
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76
fs/btrfs/tree-log.c
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@ -365,11 +365,25 @@ static int process_one_buffer(struct btrfs_root *log,
return ret;
}
static int do_overwrite_item(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
struct extent_buffer *eb, int slot,
struct btrfs_key *key)
/*
* Item overwrite used by replay and tree logging. eb, slot and key all refer
* to the src data we are copying out.
*
* root is the tree we are copying into, and path is a scratch
* path for use in this function (it should be released on entry and
* will be released on exit).
*
* If the key is already in the destination tree the existing item is
* overwritten. If the existing item isn't big enough, it is extended.
* If it is too large, it is truncated.
*
* If the key isn't in the destination yet, a new item is inserted.
*/
static int overwrite_item(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
struct extent_buffer *eb, int slot,
struct btrfs_key *key)
{
int ret;
u32 item_size;
@ -386,22 +400,10 @@ static int do_overwrite_item(struct btrfs_trans_handle *trans,
item_size = btrfs_item_size(eb, slot);
src_ptr = btrfs_item_ptr_offset(eb, slot);
/* Our caller must have done a search for the key for us. */
ASSERT(path->nodes[0] != NULL);
/*
* And the slot must point to the exact key or the slot where the key
* should be at (the first item with a key greater than 'key')
*/
if (path->slots[0] < btrfs_header_nritems(path->nodes[0])) {
struct btrfs_key found_key;
btrfs_item_key_to_cpu(path->nodes[0], &found_key, path->slots[0]);
ret = btrfs_comp_cpu_keys(&found_key, key);
ASSERT(ret >= 0);
} else {
ret = 1;
}
/* Look for the key in the destination tree. */
ret = btrfs_search_slot(NULL, root, key, path, 0, 0);
if (ret < 0)
return ret;
if (ret == 0) {
char *src_copy;
@ -579,36 +581,6 @@ no_copy:
return 0;
}
/*
* Item overwrite used by replay and tree logging. eb, slot and key all refer
* to the src data we are copying out.
*
* root is the tree we are copying into, and path is a scratch
* path for use in this function (it should be released on entry and
* will be released on exit).
*
* If the key is already in the destination tree the existing item is
* overwritten. If the existing item isn't big enough, it is extended.
* If it is too large, it is truncated.
*
* If the key isn't in the destination yet, a new item is inserted.
*/
static int overwrite_item(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
struct extent_buffer *eb, int slot,
struct btrfs_key *key)
{
int ret;
/* Look for the key in the destination tree. */
ret = btrfs_search_slot(NULL, root, key, path, 0, 0);
if (ret < 0)
return ret;
return do_overwrite_item(trans, root, path, eb, slot, key);
}
static int read_alloc_one_name(struct extent_buffer *eb, void *start, int len,
struct fscrypt_str *name)
{
@ -5406,7 +5378,7 @@ struct btrfs_dir_list {
* has a size that doesn't match the sum of the lengths of all the logged
* names - this is ok, not a problem, because at log replay time we set the
* directory's i_size to the correct value (see replay_one_name() and
* do_overwrite_item()).
* overwrite_item()).
*/
static int log_new_dir_dentries(struct btrfs_trans_handle *trans,
struct btrfs_inode *start_inode,