]>
git.ipfire.org Git - thirdparty/linux.git/blob - fs/stat.c
1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (C) 1991, 1992 Linus Torvalds
8 #include <linux/blkdev.h>
9 #include <linux/export.h>
11 #include <linux/errno.h>
12 #include <linux/file.h>
13 #include <linux/highuid.h>
15 #include <linux/namei.h>
16 #include <linux/security.h>
17 #include <linux/cred.h>
18 #include <linux/syscalls.h>
19 #include <linux/pagemap.h>
20 #include <linux/compat.h>
22 #include <linux/uaccess.h>
23 #include <asm/unistd.h>
29 * generic_fillattr - Fill in the basic attributes from the inode struct
30 * @mnt_userns: user namespace of the mount the inode was found from
31 * @inode: Inode to use as the source
32 * @stat: Where to fill in the attributes
34 * Fill in the basic attributes in the kstat structure from data that's to be
35 * found on the VFS inode structure. This is the default if no getattr inode
36 * operation is supplied.
38 * If the inode has been found through an idmapped mount the user namespace of
39 * the vfsmount must be passed through @mnt_userns. This function will then
40 * take care to map the inode according to @mnt_userns before filling in the
41 * uid and gid filds. On non-idmapped mounts or if permission checking is to be
42 * performed on the raw inode simply passs init_user_ns.
44 void generic_fillattr(struct user_namespace
*mnt_userns
, struct inode
*inode
,
47 vfsuid_t vfsuid
= i_uid_into_vfsuid(mnt_userns
, inode
);
48 vfsgid_t vfsgid
= i_gid_into_vfsgid(mnt_userns
, inode
);
50 stat
->dev
= inode
->i_sb
->s_dev
;
51 stat
->ino
= inode
->i_ino
;
52 stat
->mode
= inode
->i_mode
;
53 stat
->nlink
= inode
->i_nlink
;
54 stat
->uid
= vfsuid_into_kuid(vfsuid
);
55 stat
->gid
= vfsgid_into_kgid(vfsgid
);
56 stat
->rdev
= inode
->i_rdev
;
57 stat
->size
= i_size_read(inode
);
58 stat
->atime
= inode
->i_atime
;
59 stat
->mtime
= inode
->i_mtime
;
60 stat
->ctime
= inode
->i_ctime
;
61 stat
->blksize
= i_blocksize(inode
);
62 stat
->blocks
= inode
->i_blocks
;
64 EXPORT_SYMBOL(generic_fillattr
);
67 * generic_fill_statx_attr - Fill in the statx attributes from the inode flags
68 * @inode: Inode to use as the source
69 * @stat: Where to fill in the attribute flags
71 * Fill in the STATX_ATTR_* flags in the kstat structure for properties of the
72 * inode that are published on i_flags and enforced by the VFS.
74 void generic_fill_statx_attr(struct inode
*inode
, struct kstat
*stat
)
76 if (inode
->i_flags
& S_IMMUTABLE
)
77 stat
->attributes
|= STATX_ATTR_IMMUTABLE
;
78 if (inode
->i_flags
& S_APPEND
)
79 stat
->attributes
|= STATX_ATTR_APPEND
;
80 stat
->attributes_mask
|= KSTAT_ATTR_VFS_FLAGS
;
82 EXPORT_SYMBOL(generic_fill_statx_attr
);
85 * vfs_getattr_nosec - getattr without security checks
86 * @path: file to get attributes from
87 * @stat: structure to return attributes in
88 * @request_mask: STATX_xxx flags indicating what the caller wants
89 * @query_flags: Query mode (AT_STATX_SYNC_TYPE)
91 * Get attributes without calling security_inode_getattr.
93 * Currently the only caller other than vfs_getattr is internal to the
94 * filehandle lookup code, which uses only the inode number and returns no
95 * attributes to any user. Any other code probably wants vfs_getattr.
97 int vfs_getattr_nosec(const struct path
*path
, struct kstat
*stat
,
98 u32 request_mask
, unsigned int query_flags
)
100 struct user_namespace
*mnt_userns
;
101 struct inode
*inode
= d_backing_inode(path
->dentry
);
103 memset(stat
, 0, sizeof(*stat
));
104 stat
->result_mask
|= STATX_BASIC_STATS
;
105 query_flags
&= AT_STATX_SYNC_TYPE
;
107 /* allow the fs to override these if it really wants to */
108 /* SB_NOATIME means filesystem supplies dummy atime value */
109 if (inode
->i_sb
->s_flags
& SB_NOATIME
)
110 stat
->result_mask
&= ~STATX_ATIME
;
113 * Note: If you add another clause to set an attribute flag, please
114 * update attributes_mask below.
116 if (IS_AUTOMOUNT(inode
))
117 stat
->attributes
|= STATX_ATTR_AUTOMOUNT
;
120 stat
->attributes
|= STATX_ATTR_DAX
;
122 stat
->attributes_mask
|= (STATX_ATTR_AUTOMOUNT
|
125 mnt_userns
= mnt_user_ns(path
->mnt
);
126 if (inode
->i_op
->getattr
)
127 return inode
->i_op
->getattr(mnt_userns
, path
, stat
,
128 request_mask
, query_flags
);
130 generic_fillattr(mnt_userns
, inode
, stat
);
133 EXPORT_SYMBOL(vfs_getattr_nosec
);
136 * vfs_getattr - Get the enhanced basic attributes of a file
137 * @path: The file of interest
138 * @stat: Where to return the statistics
139 * @request_mask: STATX_xxx flags indicating what the caller wants
140 * @query_flags: Query mode (AT_STATX_SYNC_TYPE)
142 * Ask the filesystem for a file's attributes. The caller must indicate in
143 * request_mask and query_flags to indicate what they want.
145 * If the file is remote, the filesystem can be forced to update the attributes
146 * from the backing store by passing AT_STATX_FORCE_SYNC in query_flags or can
147 * suppress the update by passing AT_STATX_DONT_SYNC.
149 * Bits must have been set in request_mask to indicate which attributes the
150 * caller wants retrieving. Any such attribute not requested may be returned
151 * anyway, but the value may be approximate, and, if remote, may not have been
152 * synchronised with the server.
154 * 0 will be returned on success, and a -ve error code if unsuccessful.
156 int vfs_getattr(const struct path
*path
, struct kstat
*stat
,
157 u32 request_mask
, unsigned int query_flags
)
161 retval
= security_inode_getattr(path
);
164 return vfs_getattr_nosec(path
, stat
, request_mask
, query_flags
);
166 EXPORT_SYMBOL(vfs_getattr
);
169 * vfs_fstat - Get the basic attributes by file descriptor
170 * @fd: The file descriptor referring to the file of interest
171 * @stat: The result structure to fill in.
173 * This function is a wrapper around vfs_getattr(). The main difference is
174 * that it uses a file descriptor to determine the file location.
176 * 0 will be returned on success, and a -ve error code if unsuccessful.
178 int vfs_fstat(int fd
, struct kstat
*stat
)
186 error
= vfs_getattr(&f
.file
->f_path
, stat
, STATX_BASIC_STATS
, 0);
191 int getname_statx_lookup_flags(int flags
)
193 int lookup_flags
= 0;
195 if (!(flags
& AT_SYMLINK_NOFOLLOW
))
196 lookup_flags
|= LOOKUP_FOLLOW
;
197 if (!(flags
& AT_NO_AUTOMOUNT
))
198 lookup_flags
|= LOOKUP_AUTOMOUNT
;
199 if (flags
& AT_EMPTY_PATH
)
200 lookup_flags
|= LOOKUP_EMPTY
;
206 * vfs_statx - Get basic and extra attributes by filename
207 * @dfd: A file descriptor representing the base dir for a relative filename
208 * @filename: The name of the file of interest
209 * @flags: Flags to control the query
210 * @stat: The result structure to fill in.
211 * @request_mask: STATX_xxx flags indicating what the caller wants
213 * This function is a wrapper around vfs_getattr(). The main difference is
214 * that it uses a filename and base directory to determine the file location.
215 * Additionally, the use of AT_SYMLINK_NOFOLLOW in flags will prevent a symlink
216 * at the given name from being referenced.
218 * 0 will be returned on success, and a -ve error code if unsuccessful.
220 static int vfs_statx(int dfd
, struct filename
*filename
, int flags
,
221 struct kstat
*stat
, u32 request_mask
)
224 unsigned int lookup_flags
= getname_statx_lookup_flags(flags
);
227 if (flags
& ~(AT_SYMLINK_NOFOLLOW
| AT_NO_AUTOMOUNT
| AT_EMPTY_PATH
|
232 error
= filename_lookup(dfd
, filename
, lookup_flags
, &path
, NULL
);
236 error
= vfs_getattr(&path
, stat
, request_mask
, flags
);
238 stat
->mnt_id
= real_mount(path
.mnt
)->mnt_id
;
239 stat
->result_mask
|= STATX_MNT_ID
;
241 if (path
.mnt
->mnt_root
== path
.dentry
)
242 stat
->attributes
|= STATX_ATTR_MOUNT_ROOT
;
243 stat
->attributes_mask
|= STATX_ATTR_MOUNT_ROOT
;
245 /* Handle STATX_DIOALIGN for block devices. */
246 if (request_mask
& STATX_DIOALIGN
) {
247 struct inode
*inode
= d_backing_inode(path
.dentry
);
249 if (S_ISBLK(inode
->i_mode
))
250 bdev_statx_dioalign(inode
, stat
);
254 if (retry_estale(error
, lookup_flags
)) {
255 lookup_flags
|= LOOKUP_REVAL
;
262 int vfs_fstatat(int dfd
, const char __user
*filename
,
263 struct kstat
*stat
, int flags
)
266 int statx_flags
= flags
| AT_NO_AUTOMOUNT
;
267 struct filename
*name
;
269 name
= getname_flags(filename
, getname_statx_lookup_flags(statx_flags
), NULL
);
270 ret
= vfs_statx(dfd
, name
, statx_flags
, stat
, STATX_BASIC_STATS
);
276 #ifdef __ARCH_WANT_OLD_STAT
279 * For backward compatibility? Maybe this should be moved
280 * into arch/i386 instead?
282 static int cp_old_stat(struct kstat
*stat
, struct __old_kernel_stat __user
* statbuf
)
284 static int warncount
= 5;
285 struct __old_kernel_stat tmp
;
289 printk(KERN_WARNING
"VFS: Warning: %s using old stat() call. Recompile your binary.\n",
291 } else if (warncount
< 0) {
292 /* it's laughable, but... */
296 memset(&tmp
, 0, sizeof(struct __old_kernel_stat
));
297 tmp
.st_dev
= old_encode_dev(stat
->dev
);
298 tmp
.st_ino
= stat
->ino
;
299 if (sizeof(tmp
.st_ino
) < sizeof(stat
->ino
) && tmp
.st_ino
!= stat
->ino
)
301 tmp
.st_mode
= stat
->mode
;
302 tmp
.st_nlink
= stat
->nlink
;
303 if (tmp
.st_nlink
!= stat
->nlink
)
305 SET_UID(tmp
.st_uid
, from_kuid_munged(current_user_ns(), stat
->uid
));
306 SET_GID(tmp
.st_gid
, from_kgid_munged(current_user_ns(), stat
->gid
));
307 tmp
.st_rdev
= old_encode_dev(stat
->rdev
);
308 #if BITS_PER_LONG == 32
309 if (stat
->size
> MAX_NON_LFS
)
312 tmp
.st_size
= stat
->size
;
313 tmp
.st_atime
= stat
->atime
.tv_sec
;
314 tmp
.st_mtime
= stat
->mtime
.tv_sec
;
315 tmp
.st_ctime
= stat
->ctime
.tv_sec
;
316 return copy_to_user(statbuf
,&tmp
,sizeof(tmp
)) ? -EFAULT
: 0;
319 SYSCALL_DEFINE2(stat
, const char __user
*, filename
,
320 struct __old_kernel_stat __user
*, statbuf
)
325 error
= vfs_stat(filename
, &stat
);
329 return cp_old_stat(&stat
, statbuf
);
332 SYSCALL_DEFINE2(lstat
, const char __user
*, filename
,
333 struct __old_kernel_stat __user
*, statbuf
)
338 error
= vfs_lstat(filename
, &stat
);
342 return cp_old_stat(&stat
, statbuf
);
345 SYSCALL_DEFINE2(fstat
, unsigned int, fd
, struct __old_kernel_stat __user
*, statbuf
)
348 int error
= vfs_fstat(fd
, &stat
);
351 error
= cp_old_stat(&stat
, statbuf
);
356 #endif /* __ARCH_WANT_OLD_STAT */
358 #ifdef __ARCH_WANT_NEW_STAT
360 #if BITS_PER_LONG == 32
361 # define choose_32_64(a,b) a
363 # define choose_32_64(a,b) b
366 #ifndef INIT_STRUCT_STAT_PADDING
367 # define INIT_STRUCT_STAT_PADDING(st) memset(&st, 0, sizeof(st))
370 static int cp_new_stat(struct kstat
*stat
, struct stat __user
*statbuf
)
374 if (sizeof(tmp
.st_dev
) < 4 && !old_valid_dev(stat
->dev
))
376 if (sizeof(tmp
.st_rdev
) < 4 && !old_valid_dev(stat
->rdev
))
378 #if BITS_PER_LONG == 32
379 if (stat
->size
> MAX_NON_LFS
)
383 INIT_STRUCT_STAT_PADDING(tmp
);
384 tmp
.st_dev
= new_encode_dev(stat
->dev
);
385 tmp
.st_ino
= stat
->ino
;
386 if (sizeof(tmp
.st_ino
) < sizeof(stat
->ino
) && tmp
.st_ino
!= stat
->ino
)
388 tmp
.st_mode
= stat
->mode
;
389 tmp
.st_nlink
= stat
->nlink
;
390 if (tmp
.st_nlink
!= stat
->nlink
)
392 SET_UID(tmp
.st_uid
, from_kuid_munged(current_user_ns(), stat
->uid
));
393 SET_GID(tmp
.st_gid
, from_kgid_munged(current_user_ns(), stat
->gid
));
394 tmp
.st_rdev
= new_encode_dev(stat
->rdev
);
395 tmp
.st_size
= stat
->size
;
396 tmp
.st_atime
= stat
->atime
.tv_sec
;
397 tmp
.st_mtime
= stat
->mtime
.tv_sec
;
398 tmp
.st_ctime
= stat
->ctime
.tv_sec
;
399 #ifdef STAT_HAVE_NSEC
400 tmp
.st_atime_nsec
= stat
->atime
.tv_nsec
;
401 tmp
.st_mtime_nsec
= stat
->mtime
.tv_nsec
;
402 tmp
.st_ctime_nsec
= stat
->ctime
.tv_nsec
;
404 tmp
.st_blocks
= stat
->blocks
;
405 tmp
.st_blksize
= stat
->blksize
;
406 return copy_to_user(statbuf
,&tmp
,sizeof(tmp
)) ? -EFAULT
: 0;
409 SYSCALL_DEFINE2(newstat
, const char __user
*, filename
,
410 struct stat __user
*, statbuf
)
413 int error
= vfs_stat(filename
, &stat
);
417 return cp_new_stat(&stat
, statbuf
);
420 SYSCALL_DEFINE2(newlstat
, const char __user
*, filename
,
421 struct stat __user
*, statbuf
)
426 error
= vfs_lstat(filename
, &stat
);
430 return cp_new_stat(&stat
, statbuf
);
433 #if !defined(__ARCH_WANT_STAT64) || defined(__ARCH_WANT_SYS_NEWFSTATAT)
434 SYSCALL_DEFINE4(newfstatat
, int, dfd
, const char __user
*, filename
,
435 struct stat __user
*, statbuf
, int, flag
)
440 error
= vfs_fstatat(dfd
, filename
, &stat
, flag
);
443 return cp_new_stat(&stat
, statbuf
);
447 SYSCALL_DEFINE2(newfstat
, unsigned int, fd
, struct stat __user
*, statbuf
)
450 int error
= vfs_fstat(fd
, &stat
);
453 error
= cp_new_stat(&stat
, statbuf
);
459 static int do_readlinkat(int dfd
, const char __user
*pathname
,
460 char __user
*buf
, int bufsiz
)
465 unsigned int lookup_flags
= LOOKUP_EMPTY
;
471 error
= user_path_at_empty(dfd
, pathname
, lookup_flags
, &path
, &empty
);
473 struct inode
*inode
= d_backing_inode(path
.dentry
);
475 error
= empty
? -ENOENT
: -EINVAL
;
477 * AFS mountpoints allow readlink(2) but are not symlinks
479 if (d_is_symlink(path
.dentry
) || inode
->i_op
->readlink
) {
480 error
= security_inode_readlink(path
.dentry
);
483 error
= vfs_readlink(path
.dentry
, buf
, bufsiz
);
487 if (retry_estale(error
, lookup_flags
)) {
488 lookup_flags
|= LOOKUP_REVAL
;
495 SYSCALL_DEFINE4(readlinkat
, int, dfd
, const char __user
*, pathname
,
496 char __user
*, buf
, int, bufsiz
)
498 return do_readlinkat(dfd
, pathname
, buf
, bufsiz
);
501 SYSCALL_DEFINE3(readlink
, const char __user
*, path
, char __user
*, buf
,
504 return do_readlinkat(AT_FDCWD
, path
, buf
, bufsiz
);
508 /* ---------- LFS-64 ----------- */
509 #if defined(__ARCH_WANT_STAT64) || defined(__ARCH_WANT_COMPAT_STAT64)
511 #ifndef INIT_STRUCT_STAT64_PADDING
512 # define INIT_STRUCT_STAT64_PADDING(st) memset(&st, 0, sizeof(st))
515 static long cp_new_stat64(struct kstat
*stat
, struct stat64 __user
*statbuf
)
519 INIT_STRUCT_STAT64_PADDING(tmp
);
521 /* mips has weird padding, so we don't get 64 bits there */
522 tmp
.st_dev
= new_encode_dev(stat
->dev
);
523 tmp
.st_rdev
= new_encode_dev(stat
->rdev
);
525 tmp
.st_dev
= huge_encode_dev(stat
->dev
);
526 tmp
.st_rdev
= huge_encode_dev(stat
->rdev
);
528 tmp
.st_ino
= stat
->ino
;
529 if (sizeof(tmp
.st_ino
) < sizeof(stat
->ino
) && tmp
.st_ino
!= stat
->ino
)
531 #ifdef STAT64_HAS_BROKEN_ST_INO
532 tmp
.__st_ino
= stat
->ino
;
534 tmp
.st_mode
= stat
->mode
;
535 tmp
.st_nlink
= stat
->nlink
;
536 tmp
.st_uid
= from_kuid_munged(current_user_ns(), stat
->uid
);
537 tmp
.st_gid
= from_kgid_munged(current_user_ns(), stat
->gid
);
538 tmp
.st_atime
= stat
->atime
.tv_sec
;
539 tmp
.st_atime_nsec
= stat
->atime
.tv_nsec
;
540 tmp
.st_mtime
= stat
->mtime
.tv_sec
;
541 tmp
.st_mtime_nsec
= stat
->mtime
.tv_nsec
;
542 tmp
.st_ctime
= stat
->ctime
.tv_sec
;
543 tmp
.st_ctime_nsec
= stat
->ctime
.tv_nsec
;
544 tmp
.st_size
= stat
->size
;
545 tmp
.st_blocks
= stat
->blocks
;
546 tmp
.st_blksize
= stat
->blksize
;
547 return copy_to_user(statbuf
,&tmp
,sizeof(tmp
)) ? -EFAULT
: 0;
550 SYSCALL_DEFINE2(stat64
, const char __user
*, filename
,
551 struct stat64 __user
*, statbuf
)
554 int error
= vfs_stat(filename
, &stat
);
557 error
= cp_new_stat64(&stat
, statbuf
);
562 SYSCALL_DEFINE2(lstat64
, const char __user
*, filename
,
563 struct stat64 __user
*, statbuf
)
566 int error
= vfs_lstat(filename
, &stat
);
569 error
= cp_new_stat64(&stat
, statbuf
);
574 SYSCALL_DEFINE2(fstat64
, unsigned long, fd
, struct stat64 __user
*, statbuf
)
577 int error
= vfs_fstat(fd
, &stat
);
580 error
= cp_new_stat64(&stat
, statbuf
);
585 SYSCALL_DEFINE4(fstatat64
, int, dfd
, const char __user
*, filename
,
586 struct stat64 __user
*, statbuf
, int, flag
)
591 error
= vfs_fstatat(dfd
, filename
, &stat
, flag
);
594 return cp_new_stat64(&stat
, statbuf
);
596 #endif /* __ARCH_WANT_STAT64 || __ARCH_WANT_COMPAT_STAT64 */
598 static noinline_for_stack
int
599 cp_statx(const struct kstat
*stat
, struct statx __user
*buffer
)
603 memset(&tmp
, 0, sizeof(tmp
));
605 tmp
.stx_mask
= stat
->result_mask
;
606 tmp
.stx_blksize
= stat
->blksize
;
607 tmp
.stx_attributes
= stat
->attributes
;
608 tmp
.stx_nlink
= stat
->nlink
;
609 tmp
.stx_uid
= from_kuid_munged(current_user_ns(), stat
->uid
);
610 tmp
.stx_gid
= from_kgid_munged(current_user_ns(), stat
->gid
);
611 tmp
.stx_mode
= stat
->mode
;
612 tmp
.stx_ino
= stat
->ino
;
613 tmp
.stx_size
= stat
->size
;
614 tmp
.stx_blocks
= stat
->blocks
;
615 tmp
.stx_attributes_mask
= stat
->attributes_mask
;
616 tmp
.stx_atime
.tv_sec
= stat
->atime
.tv_sec
;
617 tmp
.stx_atime
.tv_nsec
= stat
->atime
.tv_nsec
;
618 tmp
.stx_btime
.tv_sec
= stat
->btime
.tv_sec
;
619 tmp
.stx_btime
.tv_nsec
= stat
->btime
.tv_nsec
;
620 tmp
.stx_ctime
.tv_sec
= stat
->ctime
.tv_sec
;
621 tmp
.stx_ctime
.tv_nsec
= stat
->ctime
.tv_nsec
;
622 tmp
.stx_mtime
.tv_sec
= stat
->mtime
.tv_sec
;
623 tmp
.stx_mtime
.tv_nsec
= stat
->mtime
.tv_nsec
;
624 tmp
.stx_rdev_major
= MAJOR(stat
->rdev
);
625 tmp
.stx_rdev_minor
= MINOR(stat
->rdev
);
626 tmp
.stx_dev_major
= MAJOR(stat
->dev
);
627 tmp
.stx_dev_minor
= MINOR(stat
->dev
);
628 tmp
.stx_mnt_id
= stat
->mnt_id
;
629 tmp
.stx_dio_mem_align
= stat
->dio_mem_align
;
630 tmp
.stx_dio_offset_align
= stat
->dio_offset_align
;
632 return copy_to_user(buffer
, &tmp
, sizeof(tmp
)) ? -EFAULT
: 0;
635 int do_statx(int dfd
, struct filename
*filename
, unsigned int flags
,
636 unsigned int mask
, struct statx __user
*buffer
)
641 if (mask
& STATX__RESERVED
)
643 if ((flags
& AT_STATX_SYNC_TYPE
) == AT_STATX_SYNC_TYPE
)
646 error
= vfs_statx(dfd
, filename
, flags
, &stat
, mask
);
650 return cp_statx(&stat
, buffer
);
654 * sys_statx - System call to get enhanced stats
655 * @dfd: Base directory to pathwalk from *or* fd to stat.
656 * @filename: File to stat or "" with AT_EMPTY_PATH
657 * @flags: AT_* flags to control pathwalk.
658 * @mask: Parts of statx struct actually required.
659 * @buffer: Result buffer.
661 * Note that fstat() can be emulated by setting dfd to the fd of interest,
662 * supplying "" as the filename and setting AT_EMPTY_PATH in the flags.
664 SYSCALL_DEFINE5(statx
,
665 int, dfd
, const char __user
*, filename
, unsigned, flags
,
667 struct statx __user
*, buffer
)
670 struct filename
*name
;
672 name
= getname_flags(filename
, getname_statx_lookup_flags(flags
), NULL
);
673 ret
= do_statx(dfd
, name
, flags
, mask
, buffer
);
679 #if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_STAT)
680 static int cp_compat_stat(struct kstat
*stat
, struct compat_stat __user
*ubuf
)
682 struct compat_stat tmp
;
684 if (sizeof(tmp
.st_dev
) < 4 && !old_valid_dev(stat
->dev
))
686 if (sizeof(tmp
.st_rdev
) < 4 && !old_valid_dev(stat
->rdev
))
689 memset(&tmp
, 0, sizeof(tmp
));
690 tmp
.st_dev
= new_encode_dev(stat
->dev
);
691 tmp
.st_ino
= stat
->ino
;
692 if (sizeof(tmp
.st_ino
) < sizeof(stat
->ino
) && tmp
.st_ino
!= stat
->ino
)
694 tmp
.st_mode
= stat
->mode
;
695 tmp
.st_nlink
= stat
->nlink
;
696 if (tmp
.st_nlink
!= stat
->nlink
)
698 SET_UID(tmp
.st_uid
, from_kuid_munged(current_user_ns(), stat
->uid
));
699 SET_GID(tmp
.st_gid
, from_kgid_munged(current_user_ns(), stat
->gid
));
700 tmp
.st_rdev
= new_encode_dev(stat
->rdev
);
701 if ((u64
) stat
->size
> MAX_NON_LFS
)
703 tmp
.st_size
= stat
->size
;
704 tmp
.st_atime
= stat
->atime
.tv_sec
;
705 tmp
.st_atime_nsec
= stat
->atime
.tv_nsec
;
706 tmp
.st_mtime
= stat
->mtime
.tv_sec
;
707 tmp
.st_mtime_nsec
= stat
->mtime
.tv_nsec
;
708 tmp
.st_ctime
= stat
->ctime
.tv_sec
;
709 tmp
.st_ctime_nsec
= stat
->ctime
.tv_nsec
;
710 tmp
.st_blocks
= stat
->blocks
;
711 tmp
.st_blksize
= stat
->blksize
;
712 return copy_to_user(ubuf
, &tmp
, sizeof(tmp
)) ? -EFAULT
: 0;
715 COMPAT_SYSCALL_DEFINE2(newstat
, const char __user
*, filename
,
716 struct compat_stat __user
*, statbuf
)
721 error
= vfs_stat(filename
, &stat
);
724 return cp_compat_stat(&stat
, statbuf
);
727 COMPAT_SYSCALL_DEFINE2(newlstat
, const char __user
*, filename
,
728 struct compat_stat __user
*, statbuf
)
733 error
= vfs_lstat(filename
, &stat
);
736 return cp_compat_stat(&stat
, statbuf
);
739 #ifndef __ARCH_WANT_STAT64
740 COMPAT_SYSCALL_DEFINE4(newfstatat
, unsigned int, dfd
,
741 const char __user
*, filename
,
742 struct compat_stat __user
*, statbuf
, int, flag
)
747 error
= vfs_fstatat(dfd
, filename
, &stat
, flag
);
750 return cp_compat_stat(&stat
, statbuf
);
754 COMPAT_SYSCALL_DEFINE2(newfstat
, unsigned int, fd
,
755 struct compat_stat __user
*, statbuf
)
758 int error
= vfs_fstat(fd
, &stat
);
761 error
= cp_compat_stat(&stat
, statbuf
);
766 /* Caller is here responsible for sufficient locking (ie. inode->i_lock) */
767 void __inode_add_bytes(struct inode
*inode
, loff_t bytes
)
769 inode
->i_blocks
+= bytes
>> 9;
771 inode
->i_bytes
+= bytes
;
772 if (inode
->i_bytes
>= 512) {
774 inode
->i_bytes
-= 512;
777 EXPORT_SYMBOL(__inode_add_bytes
);
779 void inode_add_bytes(struct inode
*inode
, loff_t bytes
)
781 spin_lock(&inode
->i_lock
);
782 __inode_add_bytes(inode
, bytes
);
783 spin_unlock(&inode
->i_lock
);
786 EXPORT_SYMBOL(inode_add_bytes
);
788 void __inode_sub_bytes(struct inode
*inode
, loff_t bytes
)
790 inode
->i_blocks
-= bytes
>> 9;
792 if (inode
->i_bytes
< bytes
) {
794 inode
->i_bytes
+= 512;
796 inode
->i_bytes
-= bytes
;
799 EXPORT_SYMBOL(__inode_sub_bytes
);
801 void inode_sub_bytes(struct inode
*inode
, loff_t bytes
)
803 spin_lock(&inode
->i_lock
);
804 __inode_sub_bytes(inode
, bytes
);
805 spin_unlock(&inode
->i_lock
);
808 EXPORT_SYMBOL(inode_sub_bytes
);
810 loff_t
inode_get_bytes(struct inode
*inode
)
814 spin_lock(&inode
->i_lock
);
815 ret
= __inode_get_bytes(inode
);
816 spin_unlock(&inode
->i_lock
);
820 EXPORT_SYMBOL(inode_get_bytes
);
822 void inode_set_bytes(struct inode
*inode
, loff_t bytes
)
824 /* Caller is here responsible for sufficient locking
825 * (ie. inode->i_lock) */
826 inode
->i_blocks
= bytes
>> 9;
827 inode
->i_bytes
= bytes
& 511;
830 EXPORT_SYMBOL(inode_set_bytes
);