From 1a89f1738684cac05b4bbea80dd77e8f15176d3a Mon Sep 17 00:00:00 2001 From: Filipe Manana Date: Wed, 23 Mar 2022 16:19:26 +0000 Subject: [PATCH] btrfs: stop allocating a path when checking if cross reference exists At btrfs_cross_ref_exist() we always allocate a path, but we really don't need to because all its callers (only 2) already have an allocated path that is not being used when they call btrfs_cross_ref_exist(). So change btrfs_cross_ref_exist() to take a path as an argument and update both its callers to pass in the unused path they have when they call btrfs_cross_ref_exist(). Signed-off-by: Filipe Manana Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/ctree.h | 3 ++- fs/btrfs/extent-tree.c | 9 ++------- fs/btrfs/inode.c | 5 +++-- 3 files changed, 7 insertions(+), 10 deletions(-) diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 0d0ac093e4bf..79399eb14535 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -2784,7 +2784,8 @@ int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans, u64 bytenr, u64 num_bytes); int btrfs_exclude_logged_extents(struct extent_buffer *eb); int btrfs_cross_ref_exist(struct btrfs_root *root, - u64 objectid, u64 offset, u64 bytenr, bool strict); + u64 objectid, u64 offset, u64 bytenr, bool strict, + struct btrfs_path *path); struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 parent, u64 root_objectid, diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 6aa92f84f465..fc5b9be06ec8 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -2357,15 +2357,10 @@ static noinline int check_committed_ref(struct btrfs_root *root, } int btrfs_cross_ref_exist(struct btrfs_root *root, u64 objectid, u64 offset, - u64 bytenr, bool strict) + u64 bytenr, bool strict, struct btrfs_path *path) { - struct btrfs_path *path; int ret; - path = btrfs_alloc_path(); - if (!path) - return -ENOMEM; - do { ret = check_committed_ref(root, path, objectid, offset, bytenr, strict); @@ -2376,7 +2371,7 @@ int btrfs_cross_ref_exist(struct btrfs_root *root, u64 objectid, u64 offset, } while (ret == -EAGAIN); out: - btrfs_free_path(path); + btrfs_release_path(path); if (btrfs_is_data_reloc_root(root)) WARN_ON(ret > 0); return ret; diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 05cb7b1ab172..ca47f7c43ee6 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -1788,7 +1788,8 @@ static noinline int run_delalloc_nocow(struct btrfs_inode *inode, ret = btrfs_cross_ref_exist(root, ino, found_key.offset - - extent_offset, disk_bytenr, false); + extent_offset, disk_bytenr, + false, path); if (ret) { /* * ret could be -EIO if the above fails to read @@ -7222,7 +7223,7 @@ noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, ret = btrfs_cross_ref_exist(root, btrfs_ino(BTRFS_I(inode)), key.offset - backref_offset, disk_bytenr, - strict); + strict, path); if (ret) { ret = 0; goto out; -- GitLab