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btrfs: tracepoints: add trace event for btrfs_log_inode_parent()

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btrfs_log_inode_parent() is one of the most important steps called during
a fsync operation 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 2026-04-28 16:52:09 +01:00 committed by David Sterba
parent 658d72fe49
commit d326092087
2 changed files with 107 additions and 9 deletions
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31
fs/btrfs/tree-log.c
View File

@ -7541,27 +7541,37 @@ static int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
int ret = 0;
bool log_dentries;
if (btrfs_test_opt(fs_info, NOTREELOG))
return BTRFS_LOG_FORCE_COMMIT;
trace_btrfs_log_inode_parent_enter(trans, inode);
if (btrfs_root_refs(&root->root_item) == 0)
return BTRFS_LOG_FORCE_COMMIT;
if (btrfs_test_opt(fs_info, NOTREELOG)) {
ret = BTRFS_LOG_FORCE_COMMIT;
goto out;
}
if (btrfs_root_refs(&root->root_item) == 0) {
ret = BTRFS_LOG_FORCE_COMMIT;
goto out;
}
/*
* If we're logging an inode from a subvolume created in the current
* transaction we must force a commit since the root is not persisted.
*/
if (btrfs_root_generation(&root->root_item) == trans->transid)
return BTRFS_LOG_FORCE_COMMIT;
if (btrfs_root_generation(&root->root_item) == trans->transid) {
ret = BTRFS_LOG_FORCE_COMMIT;
goto out;
}
/* Skip already logged inodes and without new extents. */
if (btrfs_inode_in_log(inode, trans->transid) &&
list_empty(&ctx->ordered_extents))
return BTRFS_NO_LOG_SYNC;
list_empty(&ctx->ordered_extents)) {
ret = BTRFS_NO_LOG_SYNC;
goto out;
}
ret = start_log_trans(trans, root, ctx);
if (ret)
return ret;
goto out;
ret = btrfs_log_inode(trans, inode, inode_only, ctx);
if (ret)
@ -7649,6 +7659,9 @@ static int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
btrfs_remove_log_ctx(root, ctx);
btrfs_end_log_trans(root);
out:
trace_btrfs_log_inode_parent_exit(trans, inode, ret);
return ret;
}

85
include/trace/events/btrfs.h
View File

@ -34,6 +34,16 @@ struct find_free_extent_ctl;
struct btrfs_trans_handle;
struct btrfs_transaction;
#define show_inode_type(mode) \
__print_symbolic((mode) & S_IFMT, \
{ S_IFDIR, "DIR" }, \
{ S_IFREG, "REG" }, \
{ S_IFLNK, "LNK" }, \
{ S_IFIFO, "FIFO" }, \
{ S_IFCHR, "CHR" }, \
{ S_IFBLK, "BLK" }, \
{ S_IFSOCK, "SOCK" })
#define show_ref_type(type) \
__print_symbolic(type, \
{ BTRFS_TREE_BLOCK_REF_KEY, "TREE_BLOCK_REF" }, \
@ -866,6 +876,81 @@ TRACE_EVENT(btrfs_sync_file_exit,
__entry->ino, __entry->ret)
);
TRACE_EVENT(btrfs_log_inode_parent_enter,
TP_PROTO(const struct btrfs_trans_handle *trans, struct btrfs_inode *inode),
TP_ARGS(trans, inode),
TP_STRUCT__entry_btrfs(
__field( u64, root_objectid )
__field( u64, ino )
__field( umode_t, mode )
__field( u64, transid )
__field( u64, generation )
__field( u64, logged_trans )
__field( u64, last_unlink_trans )
__field( int, last_sub_trans )
__field( int, inode_last_log_commit )
__field( int, root_last_log_commit )
),
TP_fast_assign(
struct btrfs_root *root = inode->root;
TP_fast_assign_fsid(root->fs_info);
__entry->root_objectid = btrfs_root_id(root);
__entry->ino = btrfs_ino(inode);
__entry->mode = inode->vfs_inode.i_mode;
__entry->transid = trans->transid;
__entry->generation = inode->generation;
spin_lock(&inode->lock);
__entry->logged_trans = inode->logged_trans;
__entry->last_unlink_trans = inode->last_unlink_trans;
__entry->last_sub_trans = inode->last_sub_trans;
__entry->inode_last_log_commit = inode->last_log_commit;
spin_unlock(&inode->lock);
__entry->root_last_log_commit = btrfs_get_root_last_log_commit(root);
),
TP_printk_btrfs("root=%llu(%s) ino=%llu type=%s transid=%llu gen=%llu"
" logged_trans=%llu last_unlink_trans=%llu last_sub_trans=%d"
" inode_last_log_commit=%d root_last_log_commit=%d",
show_root_type(__entry->root_objectid), __entry->ino,
show_inode_type(__entry->mode), __entry->transid,
__entry->generation, __entry->logged_trans,
__entry->last_unlink_trans, __entry->last_sub_trans,
__entry->inode_last_log_commit, __entry->root_last_log_commit)
);
TRACE_EVENT(btrfs_log_inode_parent_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),