[PATCH 5.15 05/20] btrfs: introduce btrfs_is_data_reloc_root

Greg Kroah-Hartman
2021-11-19T17:40:20Z

From: Johannes Thumshirn <johannes.thumshirn@wdc.com>

commit 37f00a6d2e9c97d6e7b5c3d47c49b714c3d0b99f upstream

There are several places in our codebase where we check if a root is the
root of the data reloc tree and subsequent patches will introduce more.

Factor out the check into a small helper function instead of open coding
it multiple times.

Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/btrfs/ctree.h | 5 +++++
fs/btrfs/disk-io.c | 2 +-
fs/btrfs/extent-tree.c | 2 +-
fs/btrfs/inode.c | 19 ++++++++-----------
fs/btrfs/relocation.c | 3 +--
5 files changed, 16 insertions(+), 15 deletions(-)

--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -3842,6 +3842,11 @@ static inline bool btrfs_is_zoned(const
return fs_info->zoned != 0;
}

+static inline bool btrfs_is_data_reloc_root(const struct btrfs_root *root)
+{
+ return root->root_key.objectid == BTRFS_DATA_RELOC_TREE_OBJECTID;
+}
+
/*
* We use page status Private2 to indicate there is an ordered extent with
* unfinished IO.
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1500,7 +1500,7 @@ static int btrfs_init_fs_root(struct btr
goto fail;

if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID &&
- root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID) {
+ !btrfs_is_data_reloc_root(root)) {
set_bit(BTRFS_ROOT_SHAREABLE, &root->state);
btrfs_check_and_init_root_item(&root->root_item);
}
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2376,7 +2376,7 @@ int btrfs_cross_ref_exist(struct btrfs_r

out:
btrfs_free_path(path);
- if (root->root_key.objectid == BTRFS_DATA_RELOC_TREE_OBJECTID)
+ if (btrfs_is_data_reloc_root(root))
WARN_ON(ret > 0);
return ret;
}
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1151,7 +1151,7 @@ static noinline int cow_file_range(struc
* fails during the stage where it updates the bytenr of file extent
* items.
*/
- if (root->root_key.objectid == BTRFS_DATA_RELOC_TREE_OBJECTID)
+ if (btrfs_is_data_reloc_root(root))
min_alloc_size = num_bytes;
else
min_alloc_size = fs_info->sectorsize;
@@ -1187,8 +1187,7 @@ static noinline int cow_file_range(struc
if (ret)
goto out_drop_extent_cache;

- if (root->root_key.objectid ==
- BTRFS_DATA_RELOC_TREE_OBJECTID) {
+ if (btrfs_is_data_reloc_root(root)) {
ret = btrfs_reloc_clone_csums(inode, start,
cur_alloc_size);
/*
@@ -1504,8 +1503,7 @@ static int fallback_to_cow(struct btrfs_
int *page_started, unsigned long *nr_written)
{
const bool is_space_ino = btrfs_is_free_space_inode(inode);
- const bool is_reloc_ino = (inode->root->root_key.objectid ==
- BTRFS_DATA_RELOC_TREE_OBJECTID);
+ const bool is_reloc_ino = btrfs_is_data_reloc_root(inode->root);
const u64 range_bytes = end + 1 - start;
struct extent_io_tree *io_tree = &inode->io_tree;
u64 range_start = start;
@@ -1867,8 +1865,7 @@ out_check:
btrfs_dec_nocow_writers(fs_info, disk_bytenr);
nocow = false;

- if (root->root_key.objectid ==
- BTRFS_DATA_RELOC_TREE_OBJECTID)
+ if (btrfs_is_data_reloc_root(root))
/*
* Error handled later, as we must prevent
* extent_clear_unlock_delalloc() in error handler
@@ -2207,7 +2204,7 @@ void btrfs_clear_delalloc_extent(struct
if (btrfs_is_testing(fs_info))
return;

- if (root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID &&
+ if (!btrfs_is_data_reloc_root(root) &&
do_list && !(state->state & EXTENT_NORESERVE) &&
(*bits & EXTENT_CLEAR_DATA_RESV))
btrfs_free_reserved_data_space_noquota(fs_info, len);
@@ -2532,7 +2529,7 @@ blk_status_t btrfs_submit_data_bio(struc
goto mapit;
} else if (async && !skip_sum) {
/* csum items have already been cloned */
- if (root->root_key.objectid == BTRFS_DATA_RELOC_TREE_OBJECTID)
+ if (btrfs_is_data_reloc_root(root))
goto mapit;
/* we're doing a write, do the async checksumming */
ret = btrfs_wq_submit_bio(inode, bio, mirror_num, bio_flags,
@@ -3304,7 +3301,7 @@ unsigned int btrfs_verify_data_csum(stru
u64 file_offset = pg_off + page_offset(page);
int ret;

- if (root->root_key.objectid == BTRFS_DATA_RELOC_TREE_OBJECTID &&
+ if (btrfs_is_data_reloc_root(root) &&
test_range_bit(io_tree, file_offset,
file_offset + sectorsize - 1,
EXTENT_NODATASUM, 1, NULL)) {
@@ -4005,7 +4002,7 @@ noinline int btrfs_update_inode(struct b
* without delay
*/
if (!btrfs_is_free_space_inode(inode)
- && root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID
+ && !btrfs_is_data_reloc_root(root)
&& !test_bit(BTRFS_FS_LOG_RECOVERING, &fs_info->flags)) {
btrfs_update_root_times(trans, root);

--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -4386,8 +4386,7 @@ int btrfs_reloc_cow_block(struct btrfs_t
if (!rc)
return 0;

- BUG_ON(rc->stage == UPDATE_DATA_PTRS &&
- root->root_key.objectid == BTRFS_DATA_RELOC_TREE_OBJECTID);
+ BUG_ON(rc->stage == UPDATE_DATA_PTRS && btrfs_is_data_reloc_root(root));

level = btrfs_header_level(buf);
if (btrfs_header_generation(buf) <=