Commit 0018784f authored by Bijan Mottahedeh's avatar Bijan Mottahedeh Committed by Jens Axboe
Browse files

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: default avatarBijan Mottahedeh <bijan.mottahedeh@oracle.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 1d9e1288

fs/internal.h

+2 −0
Original line number Diff line number Diff line
@@ -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);

fs/stat.c

+19 −13
Original line number Diff line number Diff line
@@ -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