One of the key architectual tenets of io-uring is to keep the
parameters for io-uring stable. After the call has been submitted,
its value can be changed. Unfortunaltely this is not the case for
the current statx implementation.
Patches:
Patch 1: fs: replace const char* parameter in vfs_statx and do_statx with
struct filename
Create filename object outside of do_statx and vfs_statx, so io-uring
can create the filename object during the prepare phase
Patch 2: io-uring: Copy path name during prepare stage for statx
Create and store filename object during prepare phase
There is also a patch for the liburing libray to add a new test case. This
patch makes sure that the api is stable.
"liburing: add test for stable statx api"
The patch has been tested with the liburing test suite and fstests.
Changes:
V2: don't check name in vfs_fstatat
V3: don't check name in statx syscall
Stefan Roesch (2):
fs: replace const char* parameter in vfs_statx and do_statx with
struct filename
io-uring: Copy path name during prepare stage for statx
fs/internal.h | 4 +++-
fs/io_uring.c | 22 ++++++++++++++++++++--
fs/stat.c | 47 ++++++++++++++++++++++++++++++++++-------------
3 files changed, 57 insertions(+), 16 deletions(-)
base-commit: 705d84a366cfccda1e7aec1113a5399cd2ffee7d
--
2.30.2
