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btrfs: tracepoints: add trace event for btrfs_log_all_parents()

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btrfs_log_all_parents() is an important step called during a fsync, as
well as during rename and link operations on inodes that were previously
logged. Add trace events for when entering and exiting that function.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Filipe Manana
2026-04-30 17:10:01 +01:00
committed by David Sterba
parent e2f67524f4
commit 0f24ea456a
2 changed files with 73 additions and 9 deletions
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29
fs/btrfs/tree-log.c
View File

@@ -7240,9 +7240,13 @@ static int btrfs_log_all_parents(struct btrfs_trans_handle *trans,
struct btrfs_root *root = inode->root;
const u64 ino = btrfs_ino(inode);
trace_btrfs_log_all_parents_enter(trans, inode);
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
if (!path) {
ret = -ENOMEM;
goto out;
}
path->skip_locking = true;
path->search_commit_root = true;
@@ -7251,7 +7255,7 @@ static int btrfs_log_all_parents(struct btrfs_trans_handle *trans,
key.offset = 0;
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
return ret;
goto out;
while (true) {
struct extent_buffer *leaf = path->nodes[0];
@@ -7263,9 +7267,11 @@ static int btrfs_log_all_parents(struct btrfs_trans_handle *trans,
if (slot >= btrfs_header_nritems(leaf)) {
ret = btrfs_next_leaf(root, path);
if (ret < 0)
return ret;
if (ret > 0)
goto out;
if (ret > 0) {
ret = 0;
break;
}
continue;
}
@@ -7318,8 +7324,10 @@ static int btrfs_log_all_parents(struct btrfs_trans_handle *trans,
* at both parents and the old parent B would still
* exist.
*/
if (IS_ERR(dir_inode))
return PTR_ERR(dir_inode);
if (IS_ERR(dir_inode)) {
ret = PTR_ERR(dir_inode);
goto out;
}
if (!need_log_inode(trans, dir_inode)) {
btrfs_add_delayed_iput(dir_inode);
@@ -7332,11 +7340,14 @@ static int btrfs_log_all_parents(struct btrfs_trans_handle *trans,
ret = log_new_dir_dentries(trans, dir_inode, ctx);
btrfs_add_delayed_iput(dir_inode);
if (ret)
return ret;
goto out;
}
path->slots[0]++;
}
return 0;
out:
trace_btrfs_log_all_parents_exit(trans, inode, ret);
return ret;
}
static int log_new_ancestors(struct btrfs_trans_handle *trans,

53
include/trace/events/btrfs.h
View File

@@ -1067,6 +1067,59 @@ TRACE_EVENT(btrfs_log_inode_exit,
__entry->last_log_commit, __entry->ret)
);
TRACE_EVENT(btrfs_log_all_parents_enter,
TP_PROTO(const struct btrfs_trans_handle *trans,
const struct btrfs_inode *inode),
TP_ARGS(trans, inode),
TP_STRUCT__entry_btrfs(
__field( u64, root_objectid )
__field( u64, ino )
__field( u64, transid )
),
TP_fast_assign(
TP_fast_assign_fsid(inode->root->fs_info);
__entry->root_objectid = btrfs_root_id(inode->root);
__entry->ino = btrfs_ino(inode);
__entry->transid = trans->transid;
),
TP_printk_btrfs("root=%llu(%s) ino=%llu transid=%llu",
show_root_type(__entry->root_objectid), __entry->ino,
__entry->transid)
);
TRACE_EVENT(btrfs_log_all_parents_exit,
TP_PROTO(const struct btrfs_trans_handle *trans,
const struct btrfs_inode *inode,
int ret),
TP_ARGS(trans, inode, ret),
TP_STRUCT__entry_btrfs(
__field( u64, root_objectid )
__field( u64, ino )
__field( u64, transid )
__field( int, ret )
),
TP_fast_assign(
TP_fast_assign_fsid(inode->root->fs_info);
__entry->root_objectid = btrfs_root_id(inode->root);
__entry->ino = btrfs_ino(inode);
__entry->transid = trans->transid;
__entry->ret = ret;
),
TP_printk_btrfs("root=%llu(%s) ino=%llu transid=%llu ret=%d",
show_root_type(__entry->root_objectid), __entry->ino,
__entry->transid, __entry->ret)
);
TRACE_EVENT(btrfs_sync_fs,
TP_PROTO(const struct btrfs_fs_info *fs_info, int wait),