3  *  linux/fs/stat.c
31  * @stat:	Where to fill in the attributes
44 		      struct kstat *stat)  in generic_fillattr()  argument
46 	stat->dev = inode->i_sb->s_dev;  in generic_fillattr()
47 	stat->ino = inode->i_ino;  in generic_fillattr()
48 	stat->mode = inode->i_mode;  in generic_fillattr()
49 	stat->nlink = inode->i_nlink;  in generic_fillattr()
50 	stat->uid = i_uid_into_mnt(mnt_userns, inode);  in generic_fillattr()
51 	stat->gid = i_gid_into_mnt(mnt_userns, inode);  in generic_fillattr()
52 	stat->rdev = inode->i_rdev;  in generic_fillattr()
53 	stat->size = i_size_read(inode);  in generic_fillattr()
54 	stat->atime = inode->i_atime;  in generic_fillattr()
55 	stat->mtime = inode->i_mtime;  in generic_fillattr()
56 	stat->ctime = inode->i_ctime;  in generic_fillattr()
57 	stat->blksize = i_blocksize(inode);  in generic_fillattr()
58 	stat->blocks = inode->i_blocks;  in generic_fillattr()
65  * @stat:	Where to fill in the attribute flags
70 void generic_fill_statx_attr(struct inode *inode, struct kstat *stat)  in generic_fill_statx_attr()  argument
73 		stat->attributes |= STATX_ATTR_IMMUTABLE;  in generic_fill_statx_attr()
75 		stat->attributes |= STATX_ATTR_APPEND;  in generic_fill_statx_attr()
76 	stat->attributes_mask |= KSTAT_ATTR_VFS_FLAGS;  in generic_fill_statx_attr()
83  * @stat: structure to return attributes in
93 int vfs_getattr_nosec(const struct path *path, struct kstat *stat,  in vfs_getattr_nosec()  argument
99 	memset(stat, 0, sizeof(*stat));  in vfs_getattr_nosec()
100 	stat->result_mask |= STATX_BASIC_STATS;  in vfs_getattr_nosec()
106 		stat->result_mask &= ~STATX_ATIME;  in vfs_getattr_nosec()
113 		stat->attributes |= STATX_ATTR_AUTOMOUNT;  in vfs_getattr_nosec()
116 		stat->attributes |= STATX_ATTR_DAX;  in vfs_getattr_nosec()
118 	stat->attributes_mask |= (STATX_ATTR_AUTOMOUNT |  in vfs_getattr_nosec()
123 		return inode->i_op->getattr(mnt_userns, path, stat,  in vfs_getattr_nosec()
126 	generic_fillattr(mnt_userns, inode, stat);  in vfs_getattr_nosec()
134  * @stat: Where to return the statistics
152 int vfs_getattr(const struct path *path, struct kstat *stat,  in vfs_getattr()  argument
160 	return vfs_getattr_nosec(path, stat, request_mask, query_flags);  in vfs_getattr()
167  * @stat: The result structure to fill in.
174 int vfs_fstat(int fd, struct kstat *stat)  in vfs_fstat()  argument
182 	error = vfs_getattr(&f.file->f_path, stat, STATX_BASIC_STATS, 0);  in vfs_fstat()
192  * @stat: The result structure to fill in.
203 	      struct kstat *stat, u32 request_mask)  in vfs_statx()  argument
225 	error = vfs_getattr(&path, stat, request_mask, flags);  in vfs_statx()
226 	stat->mnt_id = real_mount(path.mnt)->mnt_id;  in vfs_statx()
227 	stat->result_mask |= STATX_MNT_ID;  in vfs_statx()
229 		stat->attributes |= STATX_ATTR_MOUNT_ROOT;  in vfs_statx()
230 	stat->attributes_mask |= STATX_ATTR_MOUNT_ROOT;  in vfs_statx()
241 			      struct kstat *stat, int flags)  in vfs_fstatat()  argument
244 			 stat, STATX_BASIC_STATS);  in vfs_fstatat()
253 static int cp_old_stat(struct kstat *stat, struct __old_kernel_stat __user * statbuf)  in cp_old_stat()  argument
260 		printk(KERN_WARNING "VFS: Warning: %s using old stat() call. Recompile your binary.\n",  in cp_old_stat()
268 	tmp.st_dev = old_encode_dev(stat->dev);  in cp_old_stat()
269 	tmp.st_ino = stat->ino;  in cp_old_stat()
270 	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)  in cp_old_stat()
272 	tmp.st_mode = stat->mode;  in cp_old_stat()
273 	tmp.st_nlink = stat->nlink;  in cp_old_stat()
274 	if (tmp.st_nlink != stat->nlink)  in cp_old_stat()
276 	SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid));  in cp_old_stat()
277 	SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid));  in cp_old_stat()
278 	tmp.st_rdev = old_encode_dev(stat->rdev);  in cp_old_stat()
280 	if (stat->size > MAX_NON_LFS)  in cp_old_stat()
283 	tmp.st_size = stat->size;  in cp_old_stat()
284 	tmp.st_atime = stat->atime.tv_sec;  in cp_old_stat()
285 	tmp.st_mtime = stat->mtime.tv_sec;  in cp_old_stat()
286 	tmp.st_ctime = stat->ctime.tv_sec;  in cp_old_stat()
290 SYSCALL_DEFINE2(stat, const char __user *, filename,  in SYSCALL_DEFINE2()  argument
293 	struct kstat stat;  in SYSCALL_DEFINE2()  local
296 	error = vfs_stat(filename, &stat);  in SYSCALL_DEFINE2()
300 	return cp_old_stat(&stat, statbuf);  in SYSCALL_DEFINE2()
306 	struct kstat stat;  in SYSCALL_DEFINE2()  local
309 	error = vfs_lstat(filename, &stat);  in SYSCALL_DEFINE2()
313 	return cp_old_stat(&stat, statbuf);  in SYSCALL_DEFINE2()
318 	struct kstat stat;  in SYSCALL_DEFINE2()  local
319 	int error = vfs_fstat(fd, &stat);  in SYSCALL_DEFINE2()
322 		error = cp_old_stat(&stat, statbuf);  in SYSCALL_DEFINE2()
344 static int cp_new_stat(struct kstat *stat, struct stat __user *statbuf)  in cp_new_stat()  argument
346 	struct stat tmp;  in cp_new_stat()
348 	if (!valid_dev(stat->dev) || !valid_dev(stat->rdev))  in cp_new_stat()
351 	if (stat->size > MAX_NON_LFS)  in cp_new_stat()
356 	tmp.st_dev = encode_dev(stat->dev);  in cp_new_stat()
357 	tmp.st_ino = stat->ino;  in cp_new_stat()
358 	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)  in cp_new_stat()
360 	tmp.st_mode = stat->mode;  in cp_new_stat()
361 	tmp.st_nlink = stat->nlink;  in cp_new_stat()
362 	if (tmp.st_nlink != stat->nlink)  in cp_new_stat()
364 	SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid));  in cp_new_stat()
365 	SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid));  in cp_new_stat()
366 	tmp.st_rdev = encode_dev(stat->rdev);  in cp_new_stat()
367 	tmp.st_size = stat->size;  in cp_new_stat()
368 	tmp.st_atime = stat->atime.tv_sec;  in cp_new_stat()
369 	tmp.st_mtime = stat->mtime.tv_sec;  in cp_new_stat()
370 	tmp.st_ctime = stat->ctime.tv_sec;  in cp_new_stat()
372 	tmp.st_atime_nsec = stat->atime.tv_nsec;  in cp_new_stat()
373 	tmp.st_mtime_nsec = stat->mtime.tv_nsec;  in cp_new_stat()
374 	tmp.st_ctime_nsec = stat->ctime.tv_nsec;  in cp_new_stat()
376 	tmp.st_blocks = stat->blocks;  in cp_new_stat()
377 	tmp.st_blksize = stat->blksize;  in cp_new_stat()
382 		struct stat __user *, statbuf)  in SYSCALL_DEFINE2()
384 	struct kstat stat;  in SYSCALL_DEFINE2()  local
385 	int error = vfs_stat(filename, &stat);  in SYSCALL_DEFINE2()
389 	return cp_new_stat(&stat, statbuf);  in SYSCALL_DEFINE2()
393 		struct stat __user *, statbuf)  in SYSCALL_DEFINE2()
395 	struct kstat stat;  in SYSCALL_DEFINE2()  local
398 	error = vfs_lstat(filename, &stat);  in SYSCALL_DEFINE2()
402 	return cp_new_stat(&stat, statbuf);  in SYSCALL_DEFINE2()
407 		struct stat __user *, statbuf, int, flag)  in SYSCALL_DEFINE4()
409 	struct kstat stat;  in SYSCALL_DEFINE4()  local
412 	error = vfs_fstatat(dfd, filename, &stat, flag);  in SYSCALL_DEFINE4()
415 	return cp_new_stat(&stat, statbuf);  in SYSCALL_DEFINE4()
419 SYSCALL_DEFINE2(newfstat, unsigned int, fd, struct stat __user *, statbuf)  in SYSCALL_DEFINE2()
421 	struct kstat stat;  in SYSCALL_DEFINE2()  local
422 	int error = vfs_fstat(fd, &stat);  in SYSCALL_DEFINE2()
425 		error = cp_new_stat(&stat, statbuf);  in SYSCALL_DEFINE2()
487 static long cp_new_stat64(struct kstat *stat, struct stat64 __user *statbuf)  in cp_new_stat64()  argument
494 	tmp.st_dev = new_encode_dev(stat->dev);  in cp_new_stat64()
495 	tmp.st_rdev = new_encode_dev(stat->rdev);  in cp_new_stat64()
497 	tmp.st_dev = huge_encode_dev(stat->dev);  in cp_new_stat64()
498 	tmp.st_rdev = huge_encode_dev(stat->rdev);  in cp_new_stat64()
500 	tmp.st_ino = stat->ino;  in cp_new_stat64()
501 	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)  in cp_new_stat64()
504 	tmp.__st_ino = stat->ino;  in cp_new_stat64()
506 	tmp.st_mode = stat->mode;  in cp_new_stat64()
507 	tmp.st_nlink = stat->nlink;  in cp_new_stat64()
508 	tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);  in cp_new_stat64()
509 	tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);  in cp_new_stat64()
510 	tmp.st_atime = stat->atime.tv_sec;  in cp_new_stat64()
511 	tmp.st_atime_nsec = stat->atime.tv_nsec;  in cp_new_stat64()
512 	tmp.st_mtime = stat->mtime.tv_sec;  in cp_new_stat64()
513 	tmp.st_mtime_nsec = stat->mtime.tv_nsec;  in cp_new_stat64()
514 	tmp.st_ctime = stat->ctime.tv_sec;  in cp_new_stat64()
515 	tmp.st_ctime_nsec = stat->ctime.tv_nsec;  in cp_new_stat64()
516 	tmp.st_size = stat->size;  in cp_new_stat64()
517 	tmp.st_blocks = stat->blocks;  in cp_new_stat64()
518 	tmp.st_blksize = stat->blksize;  in cp_new_stat64()
525 	struct kstat stat;  in SYSCALL_DEFINE2()  local
526 	int error = vfs_stat(filename, &stat);  in SYSCALL_DEFINE2()
529 		error = cp_new_stat64(&stat, statbuf);  in SYSCALL_DEFINE2()
537 	struct kstat stat;  in SYSCALL_DEFINE2()  local
538 	int error = vfs_lstat(filename, &stat);  in SYSCALL_DEFINE2()
541 		error = cp_new_stat64(&stat, statbuf);  in SYSCALL_DEFINE2()
548 	struct kstat stat;  in SYSCALL_DEFINE2()  local
549 	int error = vfs_fstat(fd, &stat);  in SYSCALL_DEFINE2()
552 		error = cp_new_stat64(&stat, statbuf);  in SYSCALL_DEFINE2()
560 	struct kstat stat;  in SYSCALL_DEFINE4()  local
563 	error = vfs_fstatat(dfd, filename, &stat, flag);  in SYSCALL_DEFINE4()
566 	return cp_new_stat64(&stat, statbuf);  in SYSCALL_DEFINE4()
571 cp_statx(const struct kstat *stat, struct statx __user *buffer)  in cp_statx()  argument
577 	tmp.stx_mask = stat->result_mask;  in cp_statx()
578 	tmp.stx_blksize = stat->blksize;  in cp_statx()
579 	tmp.stx_attributes = stat->attributes;  in cp_statx()
580 	tmp.stx_nlink = stat->nlink;  in cp_statx()
581 	tmp.stx_uid = from_kuid_munged(current_user_ns(), stat->uid);  in cp_statx()
582 	tmp.stx_gid = from_kgid_munged(current_user_ns(), stat->gid);  in cp_statx()
583 	tmp.stx_mode = stat->mode;  in cp_statx()
584 	tmp.stx_ino = stat->ino;  in cp_statx()
585 	tmp.stx_size = stat->size;  in cp_statx()
586 	tmp.stx_blocks = stat->blocks;  in cp_statx()
587 	tmp.stx_attributes_mask = stat->attributes_mask;  in cp_statx()
588 	tmp.stx_atime.tv_sec = stat->atime.tv_sec;  in cp_statx()
589 	tmp.stx_atime.tv_nsec = stat->atime.tv_nsec;  in cp_statx()
590 	tmp.stx_btime.tv_sec = stat->btime.tv_sec;  in cp_statx()
591 	tmp.stx_btime.tv_nsec = stat->btime.tv_nsec;  in cp_statx()
592 	tmp.stx_ctime.tv_sec = stat->ctime.tv_sec;  in cp_statx()
593 	tmp.stx_ctime.tv_nsec = stat->ctime.tv_nsec;  in cp_statx()
594 	tmp.stx_mtime.tv_sec = stat->mtime.tv_sec;  in cp_statx()
595 	tmp.stx_mtime.tv_nsec = stat->mtime.tv_nsec;  in cp_statx()
596 	tmp.stx_rdev_major = MAJOR(stat->rdev);  in cp_statx()
597 	tmp.stx_rdev_minor = MINOR(stat->rdev);  in cp_statx()
598 	tmp.stx_dev_major = MAJOR(stat->dev);  in cp_statx()
599 	tmp.stx_dev_minor = MINOR(stat->dev);  in cp_statx()
600 	tmp.stx_mnt_id = stat->mnt_id;  in cp_statx()
608 	struct kstat stat;  in do_statx()  local
616 	error = vfs_statx(dfd, filename, flags, &stat, mask);  in do_statx()
620 	return cp_statx(&stat, buffer);  in do_statx()
625  * @dfd: Base directory to pathwalk from *or* fd to stat.
626  * @filename: File to stat or "" with AT_EMPTY_PATH
643 static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)  in cp_compat_stat()  argument
647 	if (!old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev))  in cp_compat_stat()
651 	tmp.st_dev = old_encode_dev(stat->dev);  in cp_compat_stat()
652 	tmp.st_ino = stat->ino;  in cp_compat_stat()
653 	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)  in cp_compat_stat()
655 	tmp.st_mode = stat->mode;  in cp_compat_stat()
656 	tmp.st_nlink = stat->nlink;  in cp_compat_stat()
657 	if (tmp.st_nlink != stat->nlink)  in cp_compat_stat()
659 	SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid));  in cp_compat_stat()
660 	SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid));  in cp_compat_stat()
661 	tmp.st_rdev = old_encode_dev(stat->rdev);  in cp_compat_stat()
662 	if ((u64) stat->size > MAX_NON_LFS)  in cp_compat_stat()
664 	tmp.st_size = stat->size;  in cp_compat_stat()
665 	tmp.st_atime = stat->atime.tv_sec;  in cp_compat_stat()
666 	tmp.st_atime_nsec = stat->atime.tv_nsec;  in cp_compat_stat()
667 	tmp.st_mtime = stat->mtime.tv_sec;  in cp_compat_stat()
668 	tmp.st_mtime_nsec = stat->mtime.tv_nsec;  in cp_compat_stat()
669 	tmp.st_ctime = stat->ctime.tv_sec;  in cp_compat_stat()
670 	tmp.st_ctime_nsec = stat->ctime.tv_nsec;  in cp_compat_stat()
671 	tmp.st_blocks = stat->blocks;  in cp_compat_stat()
672 	tmp.st_blksize = stat->blksize;  in cp_compat_stat()
679 	struct kstat stat;  in COMPAT_SYSCALL_DEFINE2()  local
682 	error = vfs_stat(filename, &stat);  in COMPAT_SYSCALL_DEFINE2()
685 	return cp_compat_stat(&stat, statbuf);  in COMPAT_SYSCALL_DEFINE2()
691 	struct kstat stat;  in COMPAT_SYSCALL_DEFINE2()  local
694 	error = vfs_lstat(filename, &stat);  in COMPAT_SYSCALL_DEFINE2()
697 	return cp_compat_stat(&stat, statbuf);  in COMPAT_SYSCALL_DEFINE2()
705 	struct kstat stat;  in COMPAT_SYSCALL_DEFINE4()  local
708 	error = vfs_fstatat(dfd, filename, &stat, flag);  in COMPAT_SYSCALL_DEFINE4()
711 	return cp_compat_stat(&stat, statbuf);  in COMPAT_SYSCALL_DEFINE4()
718 	struct kstat stat;  in COMPAT_SYSCALL_DEFINE2()  local
719 	int error = vfs_fstat(fd, &stat);  in COMPAT_SYSCALL_DEFINE2()
722 		error = cp_compat_stat(&stat, statbuf);  in COMPAT_SYSCALL_DEFINE2()