statx: allow system call to be invoked from io_uring (0018784f) · Commits · 戴 / test

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);

+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