3  *  linux/fs/stat.c
34  * @stat:		Where to fill in the attributes
47 		      struct inode *inode, struct kstat *stat)
52 	stat->dev = inode->i_sb->s_dev;
53 	stat->ino = inode->i_ino;
54 	stat->mode = inode->i_mode;
55 	stat->nlink = inode->i_nlink;
56 	stat->uid = vfsuid_into_kuid(vfsuid);
57 	stat->gid = vfsgid_into_kgid(vfsgid);
58 	stat->rdev = inode->i_rdev;
59 	stat->size = i_size_read(inode);
60 	stat->atime = inode_get_atime(inode);
61 	stat->mtime = inode_get_mtime(inode);
62 	stat->ctime = inode_get_ctime(inode);
63 	stat->blksize = i_blocksize(inode);
64 	stat->blocks = inode->i_blocks;
67 		stat->result_mask |= STATX_CHANGE_COOKIE;
68 		stat->change_cookie = inode_query_iversion(inode);
77  * @stat:	Where to fill in the attribute flags
82 void generic_fill_statx_attr(struct inode *inode, struct kstat *stat)
85 		stat->attributes |= STATX_ATTR_IMMUTABLE;
87 		stat->attributes |= STATX_ATTR_APPEND;
88 	stat->attributes_mask |= KSTAT_ATTR_VFS_FLAGS;
95  * @stat: structure to return attributes in
105 int vfs_getattr_nosec(const struct path *path, struct kstat *stat,
111 	memset(stat, 0, sizeof(*stat));
112 	stat->result_mask |= STATX_BASIC_STATS;
118 		stat->result_mask &= ~STATX_ATIME;
125 		stat->attributes |= STATX_ATTR_AUTOMOUNT;
128 		stat->attributes |= STATX_ATTR_DAX;
130 	stat->attributes_mask |= (STATX_ATTR_AUTOMOUNT |
135 		return inode->i_op->getattr(idmap, path, stat,
139 	generic_fillattr(idmap, request_mask, inode, stat);
147  * @stat: Where to return the statistics
165 int vfs_getattr(const struct path *path, struct kstat *stat,
176 	return vfs_getattr_nosec(path, stat, request_mask, query_flags);
183  * @stat: The result structure to fill in.
190 int vfs_fstat(int fd, struct kstat *stat)
198 	error = vfs_getattr(&f.file->f_path, stat, STATX_BASIC_STATS, 0);
222  * @stat: The result structure to fill in.
233 	      struct kstat *stat, u32 request_mask)
248 	error = vfs_getattr(&path, stat, request_mask, flags);
251 		stat->mnt_id = real_mount(path.mnt)->mnt_id_unique;
252 		stat->result_mask |= STATX_MNT_ID_UNIQUE;
254 		stat->mnt_id = real_mount(path.mnt)->mnt_id;
255 		stat->result_mask |= STATX_MNT_ID;
259 		stat->attributes |= STATX_ATTR_MOUNT_ROOT;
260 	stat->attributes_mask |= STATX_ATTR_MOUNT_ROOT;
267 			bdev_statx_dioalign(inode, stat);
280 			      struct kstat *stat, int flags)
300 			return vfs_fstat(dfd, stat);
304 	ret = vfs_statx(dfd, name, statx_flags, stat, STATX_BASIC_STATS);
316 static int cp_old_stat(struct kstat *stat, struct __old_kernel_stat __user * statbuf)
323 		printk(KERN_WARNING "VFS: Warning: %s using old stat() call. Recompile your binary.\n",
331 	tmp.st_dev = old_encode_dev(stat->dev);
332 	tmp.st_ino = stat->ino;
333 	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)
335 	tmp.st_mode = stat->mode;
336 	tmp.st_nlink = stat->nlink;
337 	if (tmp.st_nlink != stat->nlink)
339 	SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid));
340 	SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid));
341 	tmp.st_rdev = old_encode_dev(stat->rdev);
343 	if (stat->size > MAX_NON_LFS)
346 	tmp.st_size = stat->size;
347 	tmp.st_atime = stat->atime.tv_sec;
348 	tmp.st_mtime = stat->mtime.tv_sec;
349 	tmp.st_ctime = stat->ctime.tv_sec;
353 SYSCALL_DEFINE2(stat, const char __user *, filename,
356 	struct kstat stat;
359 	error = vfs_stat(filename, &stat);
363 	return cp_old_stat(&stat, statbuf);
369 	struct kstat stat;
372 	error = vfs_lstat(filename, &stat);
376 	return cp_old_stat(&stat, statbuf);
381 	struct kstat stat;
382 	int error = vfs_fstat(fd, &stat);
385 		error = cp_old_stat(&stat, statbuf);
398 static int cp_new_stat(struct kstat *stat, struct stat __user *statbuf)
400 	struct stat tmp;
402 	if (sizeof(tmp.st_dev) < 4 && !old_valid_dev(stat->dev))
404 	if (sizeof(tmp.st_rdev) < 4 && !old_valid_dev(stat->rdev))
407 	if (stat->size > MAX_NON_LFS)
412 	tmp.st_dev = new_encode_dev(stat->dev);
413 	tmp.st_ino = stat->ino;
414 	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)
416 	tmp.st_mode = stat->mode;
417 	tmp.st_nlink = stat->nlink;
418 	if (tmp.st_nlink != stat->nlink)
420 	SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid));
421 	SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid));
422 	tmp.st_rdev = new_encode_dev(stat->rdev);
423 	tmp.st_size = stat->size;
424 	tmp.st_atime = stat->atime.tv_sec;
425 	tmp.st_mtime = stat->mtime.tv_sec;
426 	tmp.st_ctime = stat->ctime.tv_sec;
428 	tmp.st_atime_nsec = stat->atime.tv_nsec;
429 	tmp.st_mtime_nsec = stat->mtime.tv_nsec;
430 	tmp.st_ctime_nsec = stat->ctime.tv_nsec;
432 	tmp.st_blocks = stat->blocks;
433 	tmp.st_blksize = stat->blksize;
438 		struct stat __user *, statbuf)
440 	struct kstat stat;
441 	int error = vfs_stat(filename, &stat);
445 	return cp_new_stat(&stat, statbuf);
449 		struct stat __user *, statbuf)
451 	struct kstat stat;
454 	error = vfs_lstat(filename, &stat);
458 	return cp_new_stat(&stat, statbuf);
463 		struct stat __user *, statbuf, int, flag)
465 	struct kstat stat;
468 	error = vfs_fstatat(dfd, filename, &stat, flag);
471 	return cp_new_stat(&stat, statbuf);
475 SYSCALL_DEFINE2(newfstat, unsigned int, fd, struct stat __user *, statbuf)
477 	struct kstat stat;
478 	int error = vfs_fstat(fd, &stat);
481 		error = cp_new_stat(&stat, statbuf);
543 static long cp_new_stat64(struct kstat *stat, struct stat64 __user *statbuf)
550 	tmp.st_dev = new_encode_dev(stat->dev);
551 	tmp.st_rdev = new_encode_dev(stat->rdev);
553 	tmp.st_dev = huge_encode_dev(stat->dev);
554 	tmp.st_rdev = huge_encode_dev(stat->rdev);
556 	tmp.st_ino = stat->ino;
557 	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)
560 	tmp.__st_ino = stat->ino;
562 	tmp.st_mode = stat->mode;
563 	tmp.st_nlink = stat->nlink;
564 	tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);
565 	tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);
566 	tmp.st_atime = stat->atime.tv_sec;
567 	tmp.st_atime_nsec = stat->atime.tv_nsec;
568 	tmp.st_mtime = stat->mtime.tv_sec;
569 	tmp.st_mtime_nsec = stat->mtime.tv_nsec;
570 	tmp.st_ctime = stat->ctime.tv_sec;
571 	tmp.st_ctime_nsec = stat->ctime.tv_nsec;
572 	tmp.st_size = stat->size;
573 	tmp.st_blocks = stat->blocks;
574 	tmp.st_blksize = stat->blksize;
581 	struct kstat stat;
582 	int error = vfs_stat(filename, &stat);
585 		error = cp_new_stat64(&stat, statbuf);
593 	struct kstat stat;
594 	int error = vfs_lstat(filename, &stat);
597 		error = cp_new_stat64(&stat, statbuf);
604 	struct kstat stat;
605 	int error = vfs_fstat(fd, &stat);
608 		error = cp_new_stat64(&stat, statbuf);
616 	struct kstat stat;
619 	error = vfs_fstatat(dfd, filename, &stat, flag);
622 	return cp_new_stat64(&stat, statbuf);
627 cp_statx(const struct kstat *stat, struct statx __user *buffer)
634 	tmp.stx_mask = stat->result_mask & ~STATX_CHANGE_COOKIE;
635 	tmp.stx_blksize = stat->blksize;
637 	tmp.stx_attributes = stat->attributes & ~STATX_ATTR_CHANGE_MONOTONIC;
638 	tmp.stx_nlink = stat->nlink;
639 	tmp.stx_uid = from_kuid_munged(current_user_ns(), stat->uid);
640 	tmp.stx_gid = from_kgid_munged(current_user_ns(), stat->gid);
641 	tmp.stx_mode = stat->mode;
642 	tmp.stx_ino = stat->ino;
643 	tmp.stx_size = stat->size;
644 	tmp.stx_blocks = stat->blocks;
645 	tmp.stx_attributes_mask = stat->attributes_mask;
646 	tmp.stx_atime.tv_sec = stat->atime.tv_sec;
647 	tmp.stx_atime.tv_nsec = stat->atime.tv_nsec;
648 	tmp.stx_btime.tv_sec = stat->btime.tv_sec;
649 	tmp.stx_btime.tv_nsec = stat->btime.tv_nsec;
650 	tmp.stx_ctime.tv_sec = stat->ctime.tv_sec;
651 	tmp.stx_ctime.tv_nsec = stat->ctime.tv_nsec;
652 	tmp.stx_mtime.tv_sec = stat->mtime.tv_sec;
653 	tmp.stx_mtime.tv_nsec = stat->mtime.tv_nsec;
654 	tmp.stx_rdev_major = MAJOR(stat->rdev);
655 	tmp.stx_rdev_minor = MINOR(stat->rdev);
656 	tmp.stx_dev_major = MAJOR(stat->dev);
657 	tmp.stx_dev_minor = MINOR(stat->dev);
658 	tmp.stx_mnt_id = stat->mnt_id;
659 	tmp.stx_dio_mem_align = stat->dio_mem_align;
660 	tmp.stx_dio_offset_align = stat->dio_offset_align;
668 	struct kstat stat;
681 	error = vfs_statx(dfd, filename, flags, &stat, mask);
685 	return cp_statx(&stat, buffer);
690  * @dfd: Base directory to pathwalk from *or* fd to stat.
691  * @filename: File to stat or "" with AT_EMPTY_PATH
715 static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)
719 	if (sizeof(tmp.st_dev) < 4 && !old_valid_dev(stat->dev))
721 	if (sizeof(tmp.st_rdev) < 4 && !old_valid_dev(stat->rdev))
725 	tmp.st_dev = new_encode_dev(stat->dev);
726 	tmp.st_ino = stat->ino;
727 	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)
729 	tmp.st_mode = stat->mode;
730 	tmp.st_nlink = stat->nlink;
731 	if (tmp.st_nlink != stat->nlink)
733 	SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid));
734 	SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid));
735 	tmp.st_rdev = new_encode_dev(stat->rdev);
736 	if ((u64) stat->size > MAX_NON_LFS)
738 	tmp.st_size = stat->size;
739 	tmp.st_atime = stat->atime.tv_sec;
740 	tmp.st_atime_nsec = stat->atime.tv_nsec;
741 	tmp.st_mtime = stat->mtime.tv_sec;
742 	tmp.st_mtime_nsec = stat->mtime.tv_nsec;
743 	tmp.st_ctime = stat->ctime.tv_sec;
744 	tmp.st_ctime_nsec = stat->ctime.tv_nsec;
745 	tmp.st_blocks = stat->blocks;
746 	tmp.st_blksize = stat->blksize;
753 	struct kstat stat;
756 	error = vfs_stat(filename, &stat);
759 	return cp_compat_stat(&stat, statbuf);
765 	struct kstat stat;
768 	error = vfs_lstat(filename, &stat);
771 	return cp_compat_stat(&stat, statbuf);
779 	struct kstat stat;
782 	error = vfs_fstatat(dfd, filename, &stat, flag);
785 	return cp_compat_stat(&stat, statbuf);
792 	struct kstat stat;
793 	int error = vfs_fstat(fd, &stat);
796 		error = cp_compat_stat(&stat, statbuf);

Indexes created Mon May 06 08:30:49 MDT 2024