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Code Issues Releases Wiki Activity

xfs: fix file_path handling in tracepoints

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Since file_path() takes the output buffer as one of its arguments, we
might as well have it format directly into the tracepoint's char array
instead of wasting stack space.

Fixes: 3934e8ebb7 ("xfs: create a big array data structure")
Fixes: 5076a6040c ("xfs: support in-memory buffer cache targets")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202403290419.HPcyvqZu-lkp@intel.com/
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
This commit is contained in:
Darrick J. Wong 2024-07-10 22:43:53 -07:00 committed by Chandan Babu R
parent 39c1ddb064
commit 19ebc8f84e
2 changed files with 8 additions and 12 deletions
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10
fs/xfs/scrub/trace.h
View file

@ -959,18 +959,16 @@ TRACE_EVENT(xfile_create,
TP_STRUCT__entry(
__field(dev_t, dev)
__field(unsigned long, ino)
__array(char, pathname, 256)
__array(char, pathname, MAXNAMELEN)
),
TP_fast_assign(
char pathname[257];
char *path;
__entry->ino = file_inode(xf->file)->i_ino;
memset(pathname, 0, sizeof(pathname));
path = file_path(xf->file, pathname, sizeof(pathname) - 1);
path = file_path(xf->file, __entry->pathname, MAXNAMELEN);
if (IS_ERR(path))
path = "(unknown)";
strncpy(__entry->pathname, path, sizeof(__entry->pathname));
strncpy(__entry->pathname, "(unknown)",
sizeof(__entry->pathname));
),
TP_printk("xfino 0x%lx path '%s'",
__entry->ino,

10
fs/xfs/xfs_trace.h
View file

@ -4715,20 +4715,18 @@ TRACE_EVENT(xmbuf_create,
TP_STRUCT__entry(
__field(dev_t, dev)
__field(unsigned long, ino)
__array(char, pathname, 256)
__array(char, pathname, MAXNAMELEN)
),
TP_fast_assign(
char pathname[257];
char *path;
struct file *file = btp->bt_file;
__entry->dev = btp->bt_mount->m_super->s_dev;
__entry->ino = file_inode(file)->i_ino;
memset(pathname, 0, sizeof(pathname));
path = file_path(file, pathname, sizeof(pathname) - 1);
path = file_path(file, __entry->pathname, MAXNAMELEN);
if (IS_ERR(path))
path = "(unknown)";
strncpy(__entry->pathname, path, sizeof(__entry->pathname));
strncpy(__entry->pathname, "(unknown)",
sizeof(__entry->pathname));
),
TP_printk("dev %d:%d xmino 0x%lx path '%s'",
MAJOR(__entry->dev), MINOR(__entry->dev),