diff options
| author | Bijan Mottahedeh <bijan.mottahedeh@oracle.com> | 2020-05-22 21:31:17 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-05-26 16:48:06 -0600 |
| commit | 0018784fc84f636d473a0d2a65a34f9d01893c0a (patch) | |
| tree | 8c468f2701736c720aefa84e53ab90df0a967e87 | |
| parent | 1d9e1288039a47dc1189c3c1fed5cf3c215e94b7 (diff) | |
statx: allow system call to be invoked from io_uring
This is a prepatory patch to allow io_uring to invoke statx directly.
Signed-off-by: Bijan Mottahedeh <bijan.mottahedeh@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | fs/internal.h | 2 | ||||
| -rw-r--r-- | fs/stat.c | 32 |
2 files changed, 21 insertions, 13 deletions
diff --git a/fs/internal.h b/fs/internal.h index aa5d45524e87..88a9793f96a1 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -188,3 +188,5 @@ int sb_init_dio_done_wq(struct super_block *sb); */ unsigned vfs_stat_set_lookup_flags(unsigned *lookup_flags, int flags); int cp_statx(const struct kstat *stat, struct statx __user *buffer); +int do_statx(int dfd, const char __user *filename, unsigned flags, + unsigned int mask, struct statx __user *buffer); diff --git a/fs/stat.c b/fs/stat.c index 030008796479..65cf51fda2aa 100644 --- a/fs/stat.c +++ b/fs/stat.c @@ -567,6 +567,24 @@ cp_statx(const struct kstat *stat, struct statx __user *buffer) return copy_to_user(buffer, &tmp, sizeof(tmp)) ? -EFAULT : 0; } +int do_statx(int dfd, const char __user *filename, unsigned flags, + unsigned int mask, struct statx __user *buffer) +{ + struct kstat stat; + int error; + + if (mask & STATX__RESERVED) + return -EINVAL; + if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_SYNC_TYPE) + return -EINVAL; + + error = vfs_statx(dfd, filename, flags, &stat, mask); + if (error) + return error; + + return cp_statx(&stat, buffer); +} + /** * sys_statx - System call to get enhanced stats * @dfd: Base directory to pathwalk from *or* fd to stat. @@ -583,19 +601,7 @@ SYSCALL_DEFINE5(statx, unsigned int, mask, struct statx __user *, buffer) { - struct kstat stat; - int error; - - if (mask & STATX__RESERVED) - return -EINVAL; - if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_SYNC_TYPE) - return -EINVAL; - - error = vfs_statx(dfd, filename, flags, &stat, mask); - if (error) - return error; - - return cp_statx(&stat, buffer); + return do_statx(dfd, filename, flags, mask, buffer); } #ifdef CONFIG_COMPAT |