3  *  linux/fs/stat.c
34  * @stat:		Where to fill in the attributes
47 		      struct inode *inode, struct kstat *stat)  in generic_fillattr()  argument
52 	stat->dev = inode->i_sb->s_dev;  in generic_fillattr()
53 	stat->ino = inode->i_ino;  in generic_fillattr()
54 	stat->mode = inode->i_mode;  in generic_fillattr()
55 	stat->nlink = inode->i_nlink;  in generic_fillattr()
56 	stat->uid = vfsuid_into_kuid(vfsuid);  in generic_fillattr()
57 	stat->gid = vfsgid_into_kgid(vfsgid);  in generic_fillattr()
58 	stat->rdev = inode->i_rdev;  in generic_fillattr()
59 	stat->size = i_size_read(inode);  in generic_fillattr()
60 	stat->atime = inode->i_atime;  in generic_fillattr()
61 	stat->mtime = inode->i_mtime;  in generic_fillattr()
62 	stat->ctime = inode_get_ctime(inode);  in generic_fillattr()
63 	stat->blksize = i_blocksize(inode);  in generic_fillattr()
64 	stat->blocks = inode->i_blocks;  in generic_fillattr()
67 		stat->result_mask |= STATX_CHANGE_COOKIE;  in generic_fillattr()
68 		stat->change_cookie = inode_query_iversion(inode);  in generic_fillattr()
77  * @stat:	Where to fill in the attribute flags
82 void generic_fill_statx_attr(struct inode *inode, struct kstat *stat)  in generic_fill_statx_attr()  argument
85 		stat->attributes |= STATX_ATTR_IMMUTABLE;  in generic_fill_statx_attr()
87 		stat->attributes |= STATX_ATTR_APPEND;  in generic_fill_statx_attr()
88 	stat->attributes_mask |= KSTAT_ATTR_VFS_FLAGS;  in generic_fill_statx_attr()
95  * @stat: structure to return attributes in
105 int vfs_getattr_nosec(const struct path *path, struct kstat *stat,  in vfs_getattr_nosec()  argument
111 	memset(stat, 0, sizeof(*stat));  in vfs_getattr_nosec()
112 	stat->result_mask |= STATX_BASIC_STATS;  in vfs_getattr_nosec()
118 		stat->result_mask &= ~STATX_ATIME;  in vfs_getattr_nosec()
125 		stat->attributes |= STATX_ATTR_AUTOMOUNT;  in vfs_getattr_nosec()
128 		stat->attributes |= STATX_ATTR_DAX;  in vfs_getattr_nosec()
130 	stat->attributes_mask |= (STATX_ATTR_AUTOMOUNT |  in vfs_getattr_nosec()
135 		return inode->i_op->getattr(idmap, path, stat,  in vfs_getattr_nosec()
138 	generic_fillattr(idmap, request_mask, inode, stat);  in vfs_getattr_nosec()
146  * @stat: Where to return the statistics
164 int vfs_getattr(const struct path *path, struct kstat *stat,  in vfs_getattr()  argument
172 	return vfs_getattr_nosec(path, stat, request_mask, query_flags);  in vfs_getattr()
179  * @stat: The result structure to fill in.
186 int vfs_fstat(int fd, struct kstat *stat)  in vfs_fstat()  argument
194 	error = vfs_getattr(&f.file->f_path, stat, STATX_BASIC_STATS, 0);  in vfs_fstat()
218  * @stat: The result structure to fill in.
229 	      struct kstat *stat, u32 request_mask)  in vfs_statx()  argument
244 	error = vfs_getattr(&path, stat, request_mask, flags);  in vfs_statx()
246 	stat->mnt_id = real_mount(path.mnt)->mnt_id;  in vfs_statx()
247 	stat->result_mask |= STATX_MNT_ID;  in vfs_statx()
250 		stat->attributes |= STATX_ATTR_MOUNT_ROOT;  in vfs_statx()
251 	stat->attributes_mask |= STATX_ATTR_MOUNT_ROOT;  in vfs_statx()
258 			bdev_statx_dioalign(inode, stat);  in vfs_statx()
271 			      struct kstat *stat, int flags)  in vfs_fstatat()  argument
291 			return vfs_fstat(dfd, stat);  in vfs_fstatat()
295 	ret = vfs_statx(dfd, name, statx_flags, stat, STATX_BASIC_STATS);  in vfs_fstatat()
307 static int cp_old_stat(struct kstat *stat, struct __old_kernel_stat __user * statbuf)  in cp_old_stat()  argument
314 		printk(KERN_WARNING "VFS: Warning: %s using old stat() call. Recompile your binary.\n",  in cp_old_stat()
322 	tmp.st_dev = old_encode_dev(stat->dev);  in cp_old_stat()
323 	tmp.st_ino = stat->ino;  in cp_old_stat()
324 	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)  in cp_old_stat()
326 	tmp.st_mode = stat->mode;  in cp_old_stat()
327 	tmp.st_nlink = stat->nlink;  in cp_old_stat()
328 	if (tmp.st_nlink != stat->nlink)  in cp_old_stat()
330 	SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid));  in cp_old_stat()
331 	SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid));  in cp_old_stat()
332 	tmp.st_rdev = old_encode_dev(stat->rdev);  in cp_old_stat()
334 	if (stat->size > MAX_NON_LFS)  in cp_old_stat()
337 	tmp.st_size = stat->size;  in cp_old_stat()
338 	tmp.st_atime = stat->atime.tv_sec;  in cp_old_stat()
339 	tmp.st_mtime = stat->mtime.tv_sec;  in cp_old_stat()
340 	tmp.st_ctime = stat->ctime.tv_sec;  in cp_old_stat()
344 SYSCALL_DEFINE2(stat, const char __user *, filename,  in SYSCALL_DEFINE2()  argument
347 	struct kstat stat;  in SYSCALL_DEFINE2()  local
350 	error = vfs_stat(filename, &stat);  in SYSCALL_DEFINE2()
354 	return cp_old_stat(&stat, statbuf);  in SYSCALL_DEFINE2()
360 	struct kstat stat;  in SYSCALL_DEFINE2()  local
363 	error = vfs_lstat(filename, &stat);  in SYSCALL_DEFINE2()
367 	return cp_old_stat(&stat, statbuf);  in SYSCALL_DEFINE2()
372 	struct kstat stat;  in SYSCALL_DEFINE2()  local
373 	int error = vfs_fstat(fd, &stat);  in SYSCALL_DEFINE2()
376 		error = cp_old_stat(&stat, statbuf);  in SYSCALL_DEFINE2()
389 static int cp_new_stat(struct kstat *stat, struct stat __user *statbuf)  in cp_new_stat()  argument
391 	struct stat tmp;  in cp_new_stat()
393 	if (sizeof(tmp.st_dev) < 4 && !old_valid_dev(stat->dev))  in cp_new_stat()
395 	if (sizeof(tmp.st_rdev) < 4 && !old_valid_dev(stat->rdev))  in cp_new_stat()
398 	if (stat->size > MAX_NON_LFS)  in cp_new_stat()
403 	tmp.st_dev = new_encode_dev(stat->dev);  in cp_new_stat()
404 	tmp.st_ino = stat->ino;  in cp_new_stat()
405 	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)  in cp_new_stat()
407 	tmp.st_mode = stat->mode;  in cp_new_stat()
408 	tmp.st_nlink = stat->nlink;  in cp_new_stat()
409 	if (tmp.st_nlink != stat->nlink)  in cp_new_stat()
411 	SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid));  in cp_new_stat()
412 	SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid));  in cp_new_stat()
413 	tmp.st_rdev = new_encode_dev(stat->rdev);  in cp_new_stat()
414 	tmp.st_size = stat->size;  in cp_new_stat()
415 	tmp.st_atime = stat->atime.tv_sec;  in cp_new_stat()
416 	tmp.st_mtime = stat->mtime.tv_sec;  in cp_new_stat()
417 	tmp.st_ctime = stat->ctime.tv_sec;  in cp_new_stat()
419 	tmp.st_atime_nsec = stat->atime.tv_nsec;  in cp_new_stat()
420 	tmp.st_mtime_nsec = stat->mtime.tv_nsec;  in cp_new_stat()
421 	tmp.st_ctime_nsec = stat->ctime.tv_nsec;  in cp_new_stat()
423 	tmp.st_blocks = stat->blocks;  in cp_new_stat()
424 	tmp.st_blksize = stat->blksize;  in cp_new_stat()
429 		struct stat __user *, statbuf)  in SYSCALL_DEFINE2()
431 	struct kstat stat;  in SYSCALL_DEFINE2()  local
432 	int error = vfs_stat(filename, &stat);  in SYSCALL_DEFINE2()
436 	return cp_new_stat(&stat, statbuf);  in SYSCALL_DEFINE2()
440 		struct stat __user *, statbuf)  in SYSCALL_DEFINE2()
442 	struct kstat stat;  in SYSCALL_DEFINE2()  local
445 	error = vfs_lstat(filename, &stat);  in SYSCALL_DEFINE2()
449 	return cp_new_stat(&stat, statbuf);  in SYSCALL_DEFINE2()
454 		struct stat __user *, statbuf, int, flag)  in SYSCALL_DEFINE4()
456 	struct kstat stat;  in SYSCALL_DEFINE4()  local
459 	error = vfs_fstatat(dfd, filename, &stat, flag);  in SYSCALL_DEFINE4()
462 	return cp_new_stat(&stat, statbuf);  in SYSCALL_DEFINE4()
466 SYSCALL_DEFINE2(newfstat, unsigned int, fd, struct stat __user *, statbuf)  in SYSCALL_DEFINE2()
468 	struct kstat stat;  in SYSCALL_DEFINE2()  local
469 	int error = vfs_fstat(fd, &stat);  in SYSCALL_DEFINE2()
472 		error = cp_new_stat(&stat, statbuf);  in SYSCALL_DEFINE2()
534 static long cp_new_stat64(struct kstat *stat, struct stat64 __user *statbuf)  in cp_new_stat64()  argument
541 	tmp.st_dev = new_encode_dev(stat->dev);  in cp_new_stat64()
542 	tmp.st_rdev = new_encode_dev(stat->rdev);  in cp_new_stat64()
544 	tmp.st_dev = huge_encode_dev(stat->dev);  in cp_new_stat64()
545 	tmp.st_rdev = huge_encode_dev(stat->rdev);  in cp_new_stat64()
547 	tmp.st_ino = stat->ino;  in cp_new_stat64()
548 	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)  in cp_new_stat64()
551 	tmp.__st_ino = stat->ino;  in cp_new_stat64()
553 	tmp.st_mode = stat->mode;  in cp_new_stat64()
554 	tmp.st_nlink = stat->nlink;  in cp_new_stat64()
555 	tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);  in cp_new_stat64()
556 	tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);  in cp_new_stat64()
557 	tmp.st_atime = stat->atime.tv_sec;  in cp_new_stat64()
558 	tmp.st_atime_nsec = stat->atime.tv_nsec;  in cp_new_stat64()
559 	tmp.st_mtime = stat->mtime.tv_sec;  in cp_new_stat64()
560 	tmp.st_mtime_nsec = stat->mtime.tv_nsec;  in cp_new_stat64()
561 	tmp.st_ctime = stat->ctime.tv_sec;  in cp_new_stat64()
562 	tmp.st_ctime_nsec = stat->ctime.tv_nsec;  in cp_new_stat64()
563 	tmp.st_size = stat->size;  in cp_new_stat64()
564 	tmp.st_blocks = stat->blocks;  in cp_new_stat64()
565 	tmp.st_blksize = stat->blksize;  in cp_new_stat64()
572 	struct kstat stat;  in SYSCALL_DEFINE2()  local
573 	int error = vfs_stat(filename, &stat);  in SYSCALL_DEFINE2()
576 		error = cp_new_stat64(&stat, statbuf);  in SYSCALL_DEFINE2()
584 	struct kstat stat;  in SYSCALL_DEFINE2()  local
585 	int error = vfs_lstat(filename, &stat);  in SYSCALL_DEFINE2()
588 		error = cp_new_stat64(&stat, statbuf);  in SYSCALL_DEFINE2()
595 	struct kstat stat;  in SYSCALL_DEFINE2()  local
596 	int error = vfs_fstat(fd, &stat);  in SYSCALL_DEFINE2()
599 		error = cp_new_stat64(&stat, statbuf);  in SYSCALL_DEFINE2()
607 	struct kstat stat;  in SYSCALL_DEFINE4()  local
610 	error = vfs_fstatat(dfd, filename, &stat, flag);  in SYSCALL_DEFINE4()
613 	return cp_new_stat64(&stat, statbuf);  in SYSCALL_DEFINE4()
618 cp_statx(const struct kstat *stat, struct statx __user *buffer)  in cp_statx()  argument
625 	tmp.stx_mask = stat->result_mask & ~STATX_CHANGE_COOKIE;  in cp_statx()
626 	tmp.stx_blksize = stat->blksize;  in cp_statx()
628 	tmp.stx_attributes = stat->attributes & ~STATX_ATTR_CHANGE_MONOTONIC;  in cp_statx()
629 	tmp.stx_nlink = stat->nlink;  in cp_statx()
630 	tmp.stx_uid = from_kuid_munged(current_user_ns(), stat->uid);  in cp_statx()
631 	tmp.stx_gid = from_kgid_munged(current_user_ns(), stat->gid);  in cp_statx()
632 	tmp.stx_mode = stat->mode;  in cp_statx()
633 	tmp.stx_ino = stat->ino;  in cp_statx()
634 	tmp.stx_size = stat->size;  in cp_statx()
635 	tmp.stx_blocks = stat->blocks;  in cp_statx()
636 	tmp.stx_attributes_mask = stat->attributes_mask;  in cp_statx()
637 	tmp.stx_atime.tv_sec = stat->atime.tv_sec;  in cp_statx()
638 	tmp.stx_atime.tv_nsec = stat->atime.tv_nsec;  in cp_statx()
639 	tmp.stx_btime.tv_sec = stat->btime.tv_sec;  in cp_statx()
640 	tmp.stx_btime.tv_nsec = stat->btime.tv_nsec;  in cp_statx()
641 	tmp.stx_ctime.tv_sec = stat->ctime.tv_sec;  in cp_statx()
642 	tmp.stx_ctime.tv_nsec = stat->ctime.tv_nsec;  in cp_statx()
643 	tmp.stx_mtime.tv_sec = stat->mtime.tv_sec;  in cp_statx()
644 	tmp.stx_mtime.tv_nsec = stat->mtime.tv_nsec;  in cp_statx()
645 	tmp.stx_rdev_major = MAJOR(stat->rdev);  in cp_statx()
646 	tmp.stx_rdev_minor = MINOR(stat->rdev);  in cp_statx()
647 	tmp.stx_dev_major = MAJOR(stat->dev);  in cp_statx()
648 	tmp.stx_dev_minor = MINOR(stat->dev);  in cp_statx()
649 	tmp.stx_mnt_id = stat->mnt_id;  in cp_statx()
650 	tmp.stx_dio_mem_align = stat->dio_mem_align;  in cp_statx()
651 	tmp.stx_dio_offset_align = stat->dio_offset_align;  in cp_statx()
659 	struct kstat stat;  in do_statx()  local
672 	error = vfs_statx(dfd, filename, flags, &stat, mask);  in do_statx()
676 	return cp_statx(&stat, buffer);  in do_statx()
681  * @dfd: Base directory to pathwalk from *or* fd to stat.
682  * @filename: File to stat or "" with AT_EMPTY_PATH
706 static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)  in cp_compat_stat()  argument
710 	if (sizeof(tmp.st_dev) < 4 && !old_valid_dev(stat->dev))  in cp_compat_stat()
712 	if (sizeof(tmp.st_rdev) < 4 && !old_valid_dev(stat->rdev))  in cp_compat_stat()
716 	tmp.st_dev = new_encode_dev(stat->dev);  in cp_compat_stat()
717 	tmp.st_ino = stat->ino;  in cp_compat_stat()
718 	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)  in cp_compat_stat()
720 	tmp.st_mode = stat->mode;  in cp_compat_stat()
721 	tmp.st_nlink = stat->nlink;  in cp_compat_stat()
722 	if (tmp.st_nlink != stat->nlink)  in cp_compat_stat()
724 	SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid));  in cp_compat_stat()
725 	SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid));  in cp_compat_stat()
726 	tmp.st_rdev = new_encode_dev(stat->rdev);  in cp_compat_stat()
727 	if ((u64) stat->size > MAX_NON_LFS)  in cp_compat_stat()
729 	tmp.st_size = stat->size;  in cp_compat_stat()
730 	tmp.st_atime = stat->atime.tv_sec;  in cp_compat_stat()
731 	tmp.st_atime_nsec = stat->atime.tv_nsec;  in cp_compat_stat()
732 	tmp.st_mtime = stat->mtime.tv_sec;  in cp_compat_stat()
733 	tmp.st_mtime_nsec = stat->mtime.tv_nsec;  in cp_compat_stat()
734 	tmp.st_ctime = stat->ctime.tv_sec;  in cp_compat_stat()
735 	tmp.st_ctime_nsec = stat->ctime.tv_nsec;  in cp_compat_stat()
736 	tmp.st_blocks = stat->blocks;  in cp_compat_stat()
737 	tmp.st_blksize = stat->blksize;  in cp_compat_stat()
744 	struct kstat stat;  in COMPAT_SYSCALL_DEFINE2()  local
747 	error = vfs_stat(filename, &stat);  in COMPAT_SYSCALL_DEFINE2()
750 	return cp_compat_stat(&stat, statbuf);  in COMPAT_SYSCALL_DEFINE2()
756 	struct kstat stat;  in COMPAT_SYSCALL_DEFINE2()  local
759 	error = vfs_lstat(filename, &stat);  in COMPAT_SYSCALL_DEFINE2()
762 	return cp_compat_stat(&stat, statbuf);  in COMPAT_SYSCALL_DEFINE2()
770 	struct kstat stat;  in COMPAT_SYSCALL_DEFINE4()  local
773 	error = vfs_fstatat(dfd, filename, &stat, flag);  in COMPAT_SYSCALL_DEFINE4()
776 	return cp_compat_stat(&stat, statbuf);  in COMPAT_SYSCALL_DEFINE4()
783 	struct kstat stat;  in COMPAT_SYSCALL_DEFINE2()  local
784 	int error = vfs_fstat(fd, &stat);  in COMPAT_SYSCALL_DEFINE2()
787 		error = cp_compat_stat(&stat, statbuf);  in COMPAT_SYSCALL_DEFINE2()