3  *  linux/fs/stat.c
32  * @stat:	Where to fill in the attributes
45 		      struct kstat *stat)  in generic_fillattr()  argument
47 	stat->dev = inode->i_sb->s_dev;  in generic_fillattr()
48 	stat->ino = inode->i_ino;  in generic_fillattr()
49 	stat->mode = inode->i_mode;  in generic_fillattr()
50 	stat->nlink = inode->i_nlink;  in generic_fillattr()
51 	stat->uid = i_uid_into_mnt(mnt_userns, inode);  in generic_fillattr()
52 	stat->gid = i_gid_into_mnt(mnt_userns, inode);  in generic_fillattr()
53 	stat->rdev = inode->i_rdev;  in generic_fillattr()
54 	stat->size = i_size_read(inode);  in generic_fillattr()
55 	stat->atime = inode->i_atime;  in generic_fillattr()
56 	stat->mtime = inode->i_mtime;  in generic_fillattr()
57 	stat->ctime = inode->i_ctime;  in generic_fillattr()
58 	stat->blksize = i_blocksize(inode);  in generic_fillattr()
59 	stat->blocks = inode->i_blocks;  in generic_fillattr()
66  * @stat:	Where to fill in the attribute flags
71 void generic_fill_statx_attr(struct inode *inode, struct kstat *stat)  in generic_fill_statx_attr()  argument
74 		stat->attributes |= STATX_ATTR_IMMUTABLE;  in generic_fill_statx_attr()
76 		stat->attributes |= STATX_ATTR_APPEND;  in generic_fill_statx_attr()
77 	stat->attributes_mask |= KSTAT_ATTR_VFS_FLAGS;  in generic_fill_statx_attr()
84  * @stat: structure to return attributes in
94 int vfs_getattr_nosec(const struct path *path, struct kstat *stat,  in vfs_getattr_nosec()  argument
100 	memset(stat, 0, sizeof(*stat));  in vfs_getattr_nosec()
101 	stat->result_mask |= STATX_BASIC_STATS;  in vfs_getattr_nosec()
107 		stat->result_mask &= ~STATX_ATIME;  in vfs_getattr_nosec()
114 		stat->attributes |= STATX_ATTR_AUTOMOUNT;  in vfs_getattr_nosec()
117 		stat->attributes |= STATX_ATTR_DAX;  in vfs_getattr_nosec()
119 	stat->attributes_mask |= (STATX_ATTR_AUTOMOUNT |  in vfs_getattr_nosec()
124 		return inode->i_op->getattr(mnt_userns, path, stat,  in vfs_getattr_nosec()
127 	generic_fillattr(mnt_userns, inode, stat);  in vfs_getattr_nosec()
135  * @stat: Where to return the statistics
153 int vfs_getattr(const struct path *path, struct kstat *stat,  in vfs_getattr()  argument
161 	return vfs_getattr_nosec(path, stat, request_mask, query_flags);  in vfs_getattr()
168  * @stat: The result structure to fill in.
175 int vfs_fstat(int fd, struct kstat *stat)  in vfs_fstat()  argument
183 	error = vfs_getattr(&f.file->f_path, stat, STATX_BASIC_STATS, 0);  in vfs_fstat()
207  * @stat: The result structure to fill in.
218 	      struct kstat *stat, u32 request_mask)  in vfs_statx()  argument
233 	error = vfs_getattr(&path, stat, request_mask, flags);  in vfs_statx()
235 	stat->mnt_id = real_mount(path.mnt)->mnt_id;  in vfs_statx()
236 	stat->result_mask |= STATX_MNT_ID;  in vfs_statx()
239 		stat->attributes |= STATX_ATTR_MOUNT_ROOT;  in vfs_statx()
240 	stat->attributes_mask |= STATX_ATTR_MOUNT_ROOT;  in vfs_statx()
247 			bdev_statx_dioalign(inode, stat);  in vfs_statx()
260 			      struct kstat *stat, int flags)  in vfs_fstatat()  argument
267 	ret = vfs_statx(dfd, name, statx_flags, stat, STATX_BASIC_STATS);  in vfs_fstatat()
279 static int cp_old_stat(struct kstat *stat, struct __old_kernel_stat __user * statbuf)  in cp_old_stat()  argument
286 		printk(KERN_WARNING "VFS: Warning: %s using old stat() call. Recompile your binary.\n",  in cp_old_stat()
294 	tmp.st_dev = old_encode_dev(stat->dev);  in cp_old_stat()
295 	tmp.st_ino = stat->ino;  in cp_old_stat()
296 	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)  in cp_old_stat()
298 	tmp.st_mode = stat->mode;  in cp_old_stat()
299 	tmp.st_nlink = stat->nlink;  in cp_old_stat()
300 	if (tmp.st_nlink != stat->nlink)  in cp_old_stat()
302 	SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid));  in cp_old_stat()
303 	SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid));  in cp_old_stat()
304 	tmp.st_rdev = old_encode_dev(stat->rdev);  in cp_old_stat()
306 	if (stat->size > MAX_NON_LFS)  in cp_old_stat()
309 	tmp.st_size = stat->size;  in cp_old_stat()
310 	tmp.st_atime = stat->atime.tv_sec;  in cp_old_stat()
311 	tmp.st_mtime = stat->mtime.tv_sec;  in cp_old_stat()
312 	tmp.st_ctime = stat->ctime.tv_sec;  in cp_old_stat()
316 SYSCALL_DEFINE2(stat, const char __user *, filename,  in SYSCALL_DEFINE2()  argument
319 	struct kstat stat;  in SYSCALL_DEFINE2()  local
322 	error = vfs_stat(filename, &stat);  in SYSCALL_DEFINE2()
326 	return cp_old_stat(&stat, statbuf);  in SYSCALL_DEFINE2()
332 	struct kstat stat;  in SYSCALL_DEFINE2()  local
335 	error = vfs_lstat(filename, &stat);  in SYSCALL_DEFINE2()
339 	return cp_old_stat(&stat, statbuf);  in SYSCALL_DEFINE2()
344 	struct kstat stat;  in SYSCALL_DEFINE2()  local
345 	int error = vfs_fstat(fd, &stat);  in SYSCALL_DEFINE2()
348 		error = cp_old_stat(&stat, statbuf);  in SYSCALL_DEFINE2()
367 static int cp_new_stat(struct kstat *stat, struct stat __user *statbuf)  in cp_new_stat()  argument
369 	struct stat tmp;  in cp_new_stat()
371 	if (sizeof(tmp.st_dev) < 4 && !old_valid_dev(stat->dev))  in cp_new_stat()
373 	if (sizeof(tmp.st_rdev) < 4 && !old_valid_dev(stat->rdev))  in cp_new_stat()
376 	if (stat->size > MAX_NON_LFS)  in cp_new_stat()
381 	tmp.st_dev = new_encode_dev(stat->dev);  in cp_new_stat()
382 	tmp.st_ino = stat->ino;  in cp_new_stat()
383 	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)  in cp_new_stat()
385 	tmp.st_mode = stat->mode;  in cp_new_stat()
386 	tmp.st_nlink = stat->nlink;  in cp_new_stat()
387 	if (tmp.st_nlink != stat->nlink)  in cp_new_stat()
389 	SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid));  in cp_new_stat()
390 	SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid));  in cp_new_stat()
391 	tmp.st_rdev = new_encode_dev(stat->rdev);  in cp_new_stat()
392 	tmp.st_size = stat->size;  in cp_new_stat()
393 	tmp.st_atime = stat->atime.tv_sec;  in cp_new_stat()
394 	tmp.st_mtime = stat->mtime.tv_sec;  in cp_new_stat()
395 	tmp.st_ctime = stat->ctime.tv_sec;  in cp_new_stat()
397 	tmp.st_atime_nsec = stat->atime.tv_nsec;  in cp_new_stat()
398 	tmp.st_mtime_nsec = stat->mtime.tv_nsec;  in cp_new_stat()
399 	tmp.st_ctime_nsec = stat->ctime.tv_nsec;  in cp_new_stat()
401 	tmp.st_blocks = stat->blocks;  in cp_new_stat()
402 	tmp.st_blksize = stat->blksize;  in cp_new_stat()
407 		struct stat __user *, statbuf)  in SYSCALL_DEFINE2()
409 	struct kstat stat;  in SYSCALL_DEFINE2()  local
410 	int error = vfs_stat(filename, &stat);  in SYSCALL_DEFINE2()
414 	return cp_new_stat(&stat, statbuf);  in SYSCALL_DEFINE2()
418 		struct stat __user *, statbuf)  in SYSCALL_DEFINE2()
420 	struct kstat stat;  in SYSCALL_DEFINE2()  local
423 	error = vfs_lstat(filename, &stat);  in SYSCALL_DEFINE2()
427 	return cp_new_stat(&stat, statbuf);  in SYSCALL_DEFINE2()
432 		struct stat __user *, statbuf, int, flag)  in SYSCALL_DEFINE4()
434 	struct kstat stat;  in SYSCALL_DEFINE4()  local
437 	error = vfs_fstatat(dfd, filename, &stat, flag);  in SYSCALL_DEFINE4()
440 	return cp_new_stat(&stat, statbuf);  in SYSCALL_DEFINE4()
444 SYSCALL_DEFINE2(newfstat, unsigned int, fd, struct stat __user *, statbuf)  in SYSCALL_DEFINE2()
446 	struct kstat stat;  in SYSCALL_DEFINE2()  local
447 	int error = vfs_fstat(fd, &stat);  in SYSCALL_DEFINE2()
450 		error = cp_new_stat(&stat, statbuf);  in SYSCALL_DEFINE2()
512 static long cp_new_stat64(struct kstat *stat, struct stat64 __user *statbuf)  in cp_new_stat64()  argument
519 	tmp.st_dev = new_encode_dev(stat->dev);  in cp_new_stat64()
520 	tmp.st_rdev = new_encode_dev(stat->rdev);  in cp_new_stat64()
522 	tmp.st_dev = huge_encode_dev(stat->dev);  in cp_new_stat64()
523 	tmp.st_rdev = huge_encode_dev(stat->rdev);  in cp_new_stat64()
525 	tmp.st_ino = stat->ino;  in cp_new_stat64()
526 	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)  in cp_new_stat64()
529 	tmp.__st_ino = stat->ino;  in cp_new_stat64()
531 	tmp.st_mode = stat->mode;  in cp_new_stat64()
532 	tmp.st_nlink = stat->nlink;  in cp_new_stat64()
533 	tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);  in cp_new_stat64()
534 	tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);  in cp_new_stat64()
535 	tmp.st_atime = stat->atime.tv_sec;  in cp_new_stat64()
536 	tmp.st_atime_nsec = stat->atime.tv_nsec;  in cp_new_stat64()
537 	tmp.st_mtime = stat->mtime.tv_sec;  in cp_new_stat64()
538 	tmp.st_mtime_nsec = stat->mtime.tv_nsec;  in cp_new_stat64()
539 	tmp.st_ctime = stat->ctime.tv_sec;  in cp_new_stat64()
540 	tmp.st_ctime_nsec = stat->ctime.tv_nsec;  in cp_new_stat64()
541 	tmp.st_size = stat->size;  in cp_new_stat64()
542 	tmp.st_blocks = stat->blocks;  in cp_new_stat64()
543 	tmp.st_blksize = stat->blksize;  in cp_new_stat64()
550 	struct kstat stat;  in SYSCALL_DEFINE2()  local
551 	int error = vfs_stat(filename, &stat);  in SYSCALL_DEFINE2()
554 		error = cp_new_stat64(&stat, statbuf);  in SYSCALL_DEFINE2()
562 	struct kstat stat;  in SYSCALL_DEFINE2()  local
563 	int error = vfs_lstat(filename, &stat);  in SYSCALL_DEFINE2()
566 		error = cp_new_stat64(&stat, statbuf);  in SYSCALL_DEFINE2()
573 	struct kstat stat;  in SYSCALL_DEFINE2()  local
574 	int error = vfs_fstat(fd, &stat);  in SYSCALL_DEFINE2()
577 		error = cp_new_stat64(&stat, statbuf);  in SYSCALL_DEFINE2()
585 	struct kstat stat;  in SYSCALL_DEFINE4()  local
588 	error = vfs_fstatat(dfd, filename, &stat, flag);  in SYSCALL_DEFINE4()
591 	return cp_new_stat64(&stat, statbuf);  in SYSCALL_DEFINE4()
596 cp_statx(const struct kstat *stat, struct statx __user *buffer)  in cp_statx()  argument
602 	tmp.stx_mask = stat->result_mask;  in cp_statx()
603 	tmp.stx_blksize = stat->blksize;  in cp_statx()
604 	tmp.stx_attributes = stat->attributes;  in cp_statx()
605 	tmp.stx_nlink = stat->nlink;  in cp_statx()
606 	tmp.stx_uid = from_kuid_munged(current_user_ns(), stat->uid);  in cp_statx()
607 	tmp.stx_gid = from_kgid_munged(current_user_ns(), stat->gid);  in cp_statx()
608 	tmp.stx_mode = stat->mode;  in cp_statx()
609 	tmp.stx_ino = stat->ino;  in cp_statx()
610 	tmp.stx_size = stat->size;  in cp_statx()
611 	tmp.stx_blocks = stat->blocks;  in cp_statx()
612 	tmp.stx_attributes_mask = stat->attributes_mask;  in cp_statx()
613 	tmp.stx_atime.tv_sec = stat->atime.tv_sec;  in cp_statx()
614 	tmp.stx_atime.tv_nsec = stat->atime.tv_nsec;  in cp_statx()
615 	tmp.stx_btime.tv_sec = stat->btime.tv_sec;  in cp_statx()
616 	tmp.stx_btime.tv_nsec = stat->btime.tv_nsec;  in cp_statx()
617 	tmp.stx_ctime.tv_sec = stat->ctime.tv_sec;  in cp_statx()
618 	tmp.stx_ctime.tv_nsec = stat->ctime.tv_nsec;  in cp_statx()
619 	tmp.stx_mtime.tv_sec = stat->mtime.tv_sec;  in cp_statx()
620 	tmp.stx_mtime.tv_nsec = stat->mtime.tv_nsec;  in cp_statx()
621 	tmp.stx_rdev_major = MAJOR(stat->rdev);  in cp_statx()
622 	tmp.stx_rdev_minor = MINOR(stat->rdev);  in cp_statx()
623 	tmp.stx_dev_major = MAJOR(stat->dev);  in cp_statx()
624 	tmp.stx_dev_minor = MINOR(stat->dev);  in cp_statx()
625 	tmp.stx_mnt_id = stat->mnt_id;  in cp_statx()
626 	tmp.stx_dio_mem_align = stat->dio_mem_align;  in cp_statx()
627 	tmp.stx_dio_offset_align = stat->dio_offset_align;  in cp_statx()
635 	struct kstat stat;  in do_statx()  local
643 	error = vfs_statx(dfd, filename, flags, &stat, mask);  in do_statx()
647 	return cp_statx(&stat, buffer);  in do_statx()
652  * @dfd: Base directory to pathwalk from *or* fd to stat.
653  * @filename: File to stat or "" with AT_EMPTY_PATH
677 static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)  in cp_compat_stat()  argument
681 	if (sizeof(tmp.st_dev) < 4 && !old_valid_dev(stat->dev))  in cp_compat_stat()
683 	if (sizeof(tmp.st_rdev) < 4 && !old_valid_dev(stat->rdev))  in cp_compat_stat()
687 	tmp.st_dev = new_encode_dev(stat->dev);  in cp_compat_stat()
688 	tmp.st_ino = stat->ino;  in cp_compat_stat()
689 	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)  in cp_compat_stat()
691 	tmp.st_mode = stat->mode;  in cp_compat_stat()
692 	tmp.st_nlink = stat->nlink;  in cp_compat_stat()
693 	if (tmp.st_nlink != stat->nlink)  in cp_compat_stat()
695 	SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid));  in cp_compat_stat()
696 	SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid));  in cp_compat_stat()
697 	tmp.st_rdev = new_encode_dev(stat->rdev);  in cp_compat_stat()
698 	if ((u64) stat->size > MAX_NON_LFS)  in cp_compat_stat()
700 	tmp.st_size = stat->size;  in cp_compat_stat()
701 	tmp.st_atime = stat->atime.tv_sec;  in cp_compat_stat()
702 	tmp.st_atime_nsec = stat->atime.tv_nsec;  in cp_compat_stat()
703 	tmp.st_mtime = stat->mtime.tv_sec;  in cp_compat_stat()
704 	tmp.st_mtime_nsec = stat->mtime.tv_nsec;  in cp_compat_stat()
705 	tmp.st_ctime = stat->ctime.tv_sec;  in cp_compat_stat()
706 	tmp.st_ctime_nsec = stat->ctime.tv_nsec;  in cp_compat_stat()
707 	tmp.st_blocks = stat->blocks;  in cp_compat_stat()
708 	tmp.st_blksize = stat->blksize;  in cp_compat_stat()
715 	struct kstat stat;  in COMPAT_SYSCALL_DEFINE2()  local
718 	error = vfs_stat(filename, &stat);  in COMPAT_SYSCALL_DEFINE2()
721 	return cp_compat_stat(&stat, statbuf);  in COMPAT_SYSCALL_DEFINE2()
727 	struct kstat stat;  in COMPAT_SYSCALL_DEFINE2()  local
730 	error = vfs_lstat(filename, &stat);  in COMPAT_SYSCALL_DEFINE2()
733 	return cp_compat_stat(&stat, statbuf);  in COMPAT_SYSCALL_DEFINE2()
741 	struct kstat stat;  in COMPAT_SYSCALL_DEFINE4()  local
744 	error = vfs_fstatat(dfd, filename, &stat, flag);  in COMPAT_SYSCALL_DEFINE4()
747 	return cp_compat_stat(&stat, statbuf);  in COMPAT_SYSCALL_DEFINE4()
754 	struct kstat stat;  in COMPAT_SYSCALL_DEFINE2()  local
755 	int error = vfs_fstat(fd, &stat);  in COMPAT_SYSCALL_DEFINE2()
758 		error = cp_compat_stat(&stat, statbuf);  in COMPAT_SYSCALL_DEFINE2()