[PATCH 8/8] btrfs: xattr: Use btrfs_for_each_slot macro in btrfs_listxattr
From: Marcos Paulo de Souza <hidden>
Date: 2021-08-26 16:43:14
Subsystem:
btrfs file system, filesystems (vfs and infrastructure), the rest · Maintainers:
Chris Mason, David Sterba, Alexander Viro, Christian Brauner, Linus Torvalds
The function can be simplified by using the iterator like macro. No functional changes. Signed-off-by: Marcos Paulo de Souza <redacted> --- fs/btrfs/xattr.c | 40 ++++++++++++---------------------------- 1 file changed, 12 insertions(+), 28 deletions(-)
diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index 8a4514283a4b..f85febba1891 100644
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c@@ -274,10 +274,12 @@ int btrfs_setxattr_trans(struct inode *inode, const char *name, ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size) { struct btrfs_key key; + struct btrfs_key found_key; struct inode *inode = d_inode(dentry); struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_path *path; int ret = 0; + int iter_ret = 0; size_t total_size = 0, size_left = size; /*
@@ -295,44 +297,22 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size) path->reada = READA_FORWARD; /* search for our xattrs */ - ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); - if (ret < 0) - goto err; - - while (1) { + btrfs_for_each_slot(root, &key, &found_key, path, iter_ret) { struct extent_buffer *leaf; int slot; struct btrfs_dir_item *di; - struct btrfs_key found_key; u32 item_size; u32 cur; leaf = path->nodes[0]; slot = path->slots[0]; - /* this is where we start walking through the path */ - if (slot >= btrfs_header_nritems(leaf)) { - /* - * if we've reached the last slot in this leaf we need - * to go to the next leaf and reset everything - */ - ret = btrfs_next_leaf(root, path); - if (ret < 0) - goto err; - else if (ret > 0) - break; - continue; - } - - btrfs_item_key_to_cpu(leaf, &found_key, slot); - /* check to make sure this item is what we want */ - if (found_key.objectid != key.objectid) - break; - if (found_key.type > BTRFS_XATTR_ITEM_KEY) + if (found_key.objectid != key.objectid || + found_key.type > BTRFS_XATTR_ITEM_KEY) break; if (found_key.type < BTRFS_XATTR_ITEM_KEY) - goto next_item; + continue; di = btrfs_item_ptr(leaf, slot, struct btrfs_dir_item); item_size = btrfs_item_size_nr(leaf, slot);
@@ -365,9 +345,13 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size) cur += this_len; di = (struct btrfs_dir_item *)((char *)di + this_len); } -next_item: - path->slots[0]++; } + + if (iter_ret < 0) { + ret = iter_ret; + goto err; + } + ret = total_size; err:
--
2.31.1