Commit 0ef625bba6fb ("vfs: support statx(..., NULL, AT_EMPTY_PATH,
...)") added support for passing in NULL when AT_EMPTY_PATH is given,
improving performance when statx is used for fetching stat informantion
from a given fd, which is especially important for 32-bit platforms.
This commit also improved the performance when an empty string is given
by short-circuiting the handling of such paths.
This series is based on the commits in the Linus’ tree. Modifications
are applied to vfs_statx_path(). In the original patch, vfs_statx_path()
was created to warp around the call to vfs_getattr() after
filename_lookup() in vfs_statx(). Since the coresponding code is
different in 6.1, the content of vfs_statx_path() is modified to match
this. The original patch also moved path_mounted() from namespace.c to
internal.h, which is not applicable for 6.1 since it has not been
introduced before 6.5.
Tested-by: Xi Ruoyao <xry111@xxxxxxxxxxx>
Signed-off-by: Miao Wang <shankerwangmiao@xxxxxxxxx>
---
Christian Brauner (3):
file: add fd_raw cleanup class
fs: new helper vfs_empty_path()
stat: use vfs_empty_path() helper
Linus Torvalds (1):
vfs: mostly undo glibc turning 'fstat()' into 'fstatat(AT_EMPTY_PATH)'
Mateusz Guzik (1):
vfs: support statx(..., NULL, AT_EMPTY_PATH, ...)
fs/internal.h | 2 +
fs/stat.c | 101 ++++++++++++++++++++++++++++++++++++++++-----------
include/linux/file.h | 1 +
include/linux/fs.h | 17 +++++++++
4 files changed, 99 insertions(+), 22 deletions(-)
---
base-commit: 5f55cad62cc9d8d29dd3556e0243b14355725ffb
change-id: 20240918-statx-stable-linux-6-1-y-37e6ca691c9b
Best regards,
--
Miao Wang <shankerwangmiao@xxxxxxxxx>
