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>
21 #include <linux/iversion.h>
23 #include <linux/uaccess.h>
24 #include <asm/unistd.h>
30 * generic_fillattr - Fill in the basic attributes from the inode struct
31 * @idmap: idmap of the mount the inode was found from
32 * @request_mask: statx request_mask
33 * @inode: Inode to use as the source
34 * @stat: Where to fill in the attributes
36 * Fill in the basic attributes in the kstat structure from data that's to be
37 * found on the VFS inode structure. This is the default if no getattr inode
38 * operation is supplied.
40 * If the inode has been found through an idmapped mount the idmap of
41 * the vfsmount must be passed through @idmap. This function will then
42 * take care to map the inode according to @idmap before filling in the
43 * uid and gid filds. On non-idmapped mounts or if permission checking is to be
44 * performed on the raw inode simply passs @nop_mnt_idmap.
46 void generic_fillattr(struct mnt_idmap
*idmap
, u32 request_mask
,
47 struct inode
*inode
, struct kstat
*stat
)
49 vfsuid_t vfsuid
= i_uid_into_vfsuid(idmap
, inode
);
50 vfsgid_t vfsgid
= i_gid_into_vfsgid(idmap
, inode
);
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
->i_atime
;
61 stat
->mtime
= inode
->i_mtime
;
62 stat
->ctime
= inode_get_ctime(inode
);
63 stat
->blksize
= i_blocksize(inode
);
64 stat
->blocks
= inode
->i_blocks
;
66 if ((request_mask
& STATX_CHANGE_COOKIE
) && IS_I_VERSION(inode
)) {
67 stat
->result_mask
|= STATX_CHANGE_COOKIE
;
68 stat
->change_cookie
= inode_query_iversion(inode
);
72 EXPORT_SYMBOL(generic_fillattr
);
75 * generic_fill_statx_attr - Fill in the statx attributes from the inode flags
76 * @inode: Inode to use as the source
77 * @stat: Where to fill in the attribute flags
79 * Fill in the STATX_ATTR_* flags in the kstat structure for properties of the
80 * inode that are published on i_flags and enforced by the VFS.
82 void generic_fill_statx_attr(struct inode
*inode
, struct kstat
*stat
)
84 if (inode
->i_flags
& S_IMMUTABLE
)
85 stat
->attributes
|= STATX_ATTR_IMMUTABLE
;
86 if (inode
->i_flags
& S_APPEND
)
87 stat
->attributes
|= STATX_ATTR_APPEND
;
88 stat
->attributes_mask
|= KSTAT_ATTR_VFS_FLAGS
;
90 EXPORT_SYMBOL(generic_fill_statx_attr
);
93 * vfs_getattr_nosec - getattr without security checks
94 * @path: file to get attributes from
95 * @stat: structure to return attributes in
96 * @request_mask: STATX_xxx flags indicating what the caller wants
97 * @query_flags: Query mode (AT_STATX_SYNC_TYPE)
99 * Get attributes without calling security_inode_getattr.
101 * Currently the only caller other than vfs_getattr is internal to the
102 * filehandle lookup code, which uses only the inode number and returns no
103 * attributes to any user. Any other code probably wants vfs_getattr.
105 int vfs_getattr_nosec(const struct path
*path
, struct kstat
*stat
,
106 u32 request_mask
, unsigned int query_flags
)
108 struct mnt_idmap
*idmap
;
109 struct inode
*inode
= d_backing_inode(path
->dentry
);
111 memset(stat
, 0, sizeof(*stat
));
112 stat
->result_mask
|= STATX_BASIC_STATS
;
113 query_flags
&= AT_STATX_SYNC_TYPE
;
115 /* allow the fs to override these if it really wants to */
116 /* SB_NOATIME means filesystem supplies dummy atime value */
117 if (inode
->i_sb
->s_flags
& SB_NOATIME
)
118 stat
->result_mask
&= ~STATX_ATIME
;
121 * Note: If you add another clause to set an attribute flag, please
122 * update attributes_mask below.
124 if (IS_AUTOMOUNT(inode
))
125 stat
->attributes
|= STATX_ATTR_AUTOMOUNT
;
128 stat
->attributes
|= STATX_ATTR_DAX
;
130 stat
->attributes_mask
|= (STATX_ATTR_AUTOMOUNT
|
133 idmap
= mnt_idmap(path
->mnt
);
134 if (inode
->i_op
->getattr
)
135 return inode
->i_op
->getattr(idmap
, path
, stat
,
136 request_mask
, query_flags
);
138 generic_fillattr(idmap
, request_mask
, inode
, stat
);
141 EXPORT_SYMBOL(vfs_getattr_nosec
);
144 * vfs_getattr - Get the enhanced basic attributes of a file
145 * @path: The file of interest
146 * @stat: Where to return the statistics
147 * @request_mask: STATX_xxx flags indicating what the caller wants
148 * @query_flags: Query mode (AT_STATX_SYNC_TYPE)
150 * Ask the filesystem for a file's attributes. The caller must indicate in
151 * request_mask and query_flags to indicate what they want.
153 * If the file is remote, the filesystem can be forced to update the attributes
154 * from the backing store by passing AT_STATX_FORCE_SYNC in query_flags or can
155 * suppress the update by passing AT_STATX_DONT_SYNC.
157 * Bits must have been set in request_mask to indicate which attributes the
158 * caller wants retrieving. Any such attribute not requested may be returned
159 * anyway, but the value may be approximate, and, if remote, may not have been
160 * synchronised with the server.
162 * 0 will be returned on success, and a -ve error code if unsuccessful.
164 int vfs_getattr(const struct path
*path
, struct kstat
*stat
,
165 u32 request_mask
, unsigned int query_flags
)
169 retval
= security_inode_getattr(path
);
172 return vfs_getattr_nosec(path
, stat
, request_mask
, query_flags
);
174 EXPORT_SYMBOL(vfs_getattr
);
177 * vfs_fstat - Get the basic attributes by file descriptor
178 * @fd: The file descriptor referring to the file of interest
179 * @stat: The result structure to fill in.
181 * This function is a wrapper around vfs_getattr(). The main difference is
182 * that it uses a file descriptor to determine the file location.
184 * 0 will be returned on success, and a -ve error code if unsuccessful.
186 int vfs_fstat(int fd
, struct kstat
*stat
)
194 error
= vfs_getattr(&f
.file
->f_path
, stat
, STATX_BASIC_STATS
, 0);
199 int getname_statx_lookup_flags(int flags
)
201 int lookup_flags
= 0;
203 if (!(flags
& AT_SYMLINK_NOFOLLOW
))
204 lookup_flags
|= LOOKUP_FOLLOW
;
205 if (!(flags
& AT_NO_AUTOMOUNT
))
206 lookup_flags
|= LOOKUP_AUTOMOUNT
;
207 if (flags
& AT_EMPTY_PATH
)
208 lookup_flags
|= LOOKUP_EMPTY
;
214 * vfs_statx - Get basic and extra attributes by filename
215 * @dfd: A file descriptor representing the base dir for a relative filename
216 * @filename: The name of the file of interest
217 * @flags: Flags to control the query
218 * @stat: The result structure to fill in.
219 * @request_mask: STATX_xxx flags indicating what the caller wants
221 * This function is a wrapper around vfs_getattr(). The main difference is
222 * that it uses a filename and base directory to determine the file location.
223 * Additionally, the use of AT_SYMLINK_NOFOLLOW in flags will prevent a symlink
224 * at the given name from being referenced.
226 * 0 will be returned on success, and a -ve error code if unsuccessful.
228 static int vfs_statx(int dfd
, struct filename
*filename
, int flags
,
229 struct kstat
*stat
, u32 request_mask
)
232 unsigned int lookup_flags
= getname_statx_lookup_flags(flags
);
235 if (flags
& ~(AT_SYMLINK_NOFOLLOW
| AT_NO_AUTOMOUNT
| AT_EMPTY_PATH
|
240 error
= filename_lookup(dfd
, filename
, lookup_flags
, &path
, NULL
);
244 error
= vfs_getattr(&path
, stat
, request_mask
, flags
);
246 stat
->mnt_id
= real_mount(path
.mnt
)->mnt_id
;
247 stat
->result_mask
|= STATX_MNT_ID
;
249 if (path
.mnt
->mnt_root
== path
.dentry
)
250 stat
->attributes
|= STATX_ATTR_MOUNT_ROOT
;
251 stat
->attributes_mask
|= STATX_ATTR_MOUNT_ROOT
;
253 /* Handle STATX_DIOALIGN for block devices. */
254 if (request_mask
& STATX_DIOALIGN
) {
255 struct inode
*inode
= d_backing_inode(path
.dentry
);
257 if (S_ISBLK(inode
->i_mode
))
258 bdev_statx_dioalign(inode
, stat
);
262 if (retry_estale(error
, lookup_flags
)) {
263 lookup_flags
|= LOOKUP_REVAL
;
270 int vfs_fstatat(int dfd
, const char __user
*filename
,
271 struct kstat
*stat
, int flags
)
274 int statx_flags
= flags
| AT_NO_AUTOMOUNT
;
275 struct filename
*name
;
278 * Work around glibc turning fstat() into fstatat(AT_EMPTY_PATH)
280 * If AT_EMPTY_PATH is set, we expect the common case to be that
281 * empty path, and avoid doing all the extra pathname work.
283 if (dfd
>= 0 && flags
== AT_EMPTY_PATH
) {
286 ret
= get_user(c
, filename
);
291 return vfs_fstat(dfd
, stat
);
294 name
= getname_flags(filename
, getname_statx_lookup_flags(statx_flags
), NULL
);
295 ret
= vfs_statx(dfd
, name
, statx_flags
, stat
, STATX_BASIC_STATS
);
301 #ifdef __ARCH_WANT_OLD_STAT
304 * For backward compatibility? Maybe this should be moved
305 * into arch/i386 instead?
307 static int cp_old_stat(struct kstat
*stat
, struct __old_kernel_stat __user
* statbuf
)
309 static int warncount
= 5;
310 struct __old_kernel_stat tmp
;
314 printk(KERN_WARNING
"VFS: Warning: %s using old stat() call. Recompile your binary.\n",
316 } else if (warncount
< 0) {
317 /* it's laughable, but... */
321 memset(&tmp
, 0, sizeof(struct __old_kernel_stat
));
322 tmp
.st_dev
= old_encode_dev(stat
->dev
);
323 tmp
.st_ino
= stat
->ino
;
324 if (sizeof(tmp
.st_ino
) < sizeof(stat
->ino
) && tmp
.st_ino
!= stat
->ino
)
326 tmp
.st_mode
= stat
->mode
;
327 tmp
.st_nlink
= stat
->nlink
;
328 if (tmp
.st_nlink
!= stat
->nlink
)
330 SET_UID(tmp
.st_uid
, from_kuid_munged(current_user_ns(), stat
->uid
));
331 SET_GID(tmp
.st_gid
, from_kgid_munged(current_user_ns(), stat
->gid
));
332 tmp
.st_rdev
= old_encode_dev(stat
->rdev
);
333 #if BITS_PER_LONG == 32
334 if (stat
->size
> MAX_NON_LFS
)
337 tmp
.st_size
= stat
->size
;
338 tmp
.st_atime
= stat
->atime
.tv_sec
;
339 tmp
.st_mtime
= stat
->mtime
.tv_sec
;
340 tmp
.st_ctime
= stat
->ctime
.tv_sec
;
341 return copy_to_user(statbuf
,&tmp
,sizeof(tmp
)) ? -EFAULT
: 0;
344 SYSCALL_DEFINE2(stat
, const char __user
*, filename
,
345 struct __old_kernel_stat __user
*, statbuf
)
350 error
= vfs_stat(filename
, &stat
);
354 return cp_old_stat(&stat
, statbuf
);
357 SYSCALL_DEFINE2(lstat
, const char __user
*, filename
,
358 struct __old_kernel_stat __user
*, statbuf
)
363 error
= vfs_lstat(filename
, &stat
);
367 return cp_old_stat(&stat
, statbuf
);
370 SYSCALL_DEFINE2(fstat
, unsigned int, fd
, struct __old_kernel_stat __user
*, statbuf
)
373 int error
= vfs_fstat(fd
, &stat
);
376 error
= cp_old_stat(&stat
, statbuf
);
381 #endif /* __ARCH_WANT_OLD_STAT */
383 #ifdef __ARCH_WANT_NEW_STAT
385 #ifndef INIT_STRUCT_STAT_PADDING
386 # define INIT_STRUCT_STAT_PADDING(st) memset(&st, 0, sizeof(st))
389 static int cp_new_stat(struct kstat
*stat
, struct stat __user
*statbuf
)
393 if (sizeof(tmp
.st_dev
) < 4 && !old_valid_dev(stat
->dev
))
395 if (sizeof(tmp
.st_rdev
) < 4 && !old_valid_dev(stat
->rdev
))
397 #if BITS_PER_LONG == 32
398 if (stat
->size
> MAX_NON_LFS
)
402 INIT_STRUCT_STAT_PADDING(tmp
);
403 tmp
.st_dev
= new_encode_dev(stat
->dev
);
404 tmp
.st_ino
= stat
->ino
;
405 if (sizeof(tmp
.st_ino
) < sizeof(stat
->ino
) && tmp
.st_ino
!= stat
->ino
)
407 tmp
.st_mode
= stat
->mode
;
408 tmp
.st_nlink
= stat
->nlink
;
409 if (tmp
.st_nlink
!= stat
->nlink
)
411 SET_UID(tmp
.st_uid
, from_kuid_munged(current_user_ns(), stat
->uid
));
412 SET_GID(tmp
.st_gid
, from_kgid_munged(current_user_ns(), stat
->gid
));
413 tmp
.st_rdev
= new_encode_dev(stat
->rdev
);
414 tmp
.st_size
= stat
->size
;
415 tmp
.st_atime
= stat
->atime
.tv_sec
;
416 tmp
.st_mtime
= stat
->mtime
.tv_sec
;
417 tmp
.st_ctime
= stat
->ctime
.tv_sec
;
418 #ifdef STAT_HAVE_NSEC
419 tmp
.st_atime_nsec
= stat
->atime
.tv_nsec
;
420 tmp
.st_mtime_nsec
= stat
->mtime
.tv_nsec
;
421 tmp
.st_ctime_nsec
= stat
->ctime
.tv_nsec
;
423 tmp
.st_blocks
= stat
->blocks
;
424 tmp
.st_blksize
= stat
->blksize
;
425 return copy_to_user(statbuf
,&tmp
,sizeof(tmp
)) ? -EFAULT
: 0;
428 SYSCALL_DEFINE2(newstat
, const char __user
*, filename
,
429 struct stat __user
*, statbuf
)
432 int error
= vfs_stat(filename
, &stat
);
436 return cp_new_stat(&stat
, statbuf
);
439 SYSCALL_DEFINE2(newlstat
, const char __user
*, filename
,
440 struct stat __user
*, statbuf
)
445 error
= vfs_lstat(filename
, &stat
);
449 return cp_new_stat(&stat
, statbuf
);
452 #if !defined(__ARCH_WANT_STAT64) || defined(__ARCH_WANT_SYS_NEWFSTATAT)
453 SYSCALL_DEFINE4(newfstatat
, int, dfd
, const char __user
*, filename
,
454 struct stat __user
*, statbuf
, int, flag
)
459 error
= vfs_fstatat(dfd
, filename
, &stat
, flag
);
462 return cp_new_stat(&stat
, statbuf
);
466 SYSCALL_DEFINE2(newfstat
, unsigned int, fd
, struct stat __user
*, statbuf
)
469 int error
= vfs_fstat(fd
, &stat
);
472 error
= cp_new_stat(&stat
, statbuf
);
478 static int do_readlinkat(int dfd
, const char __user
*pathname
,
479 char __user
*buf
, int bufsiz
)
484 unsigned int lookup_flags
= LOOKUP_EMPTY
;
490 error
= user_path_at_empty(dfd
, pathname
, lookup_flags
, &path
, &empty
);
492 struct inode
*inode
= d_backing_inode(path
.dentry
);
494 error
= empty
? -ENOENT
: -EINVAL
;
496 * AFS mountpoints allow readlink(2) but are not symlinks
498 if (d_is_symlink(path
.dentry
) || inode
->i_op
->readlink
) {
499 error
= security_inode_readlink(path
.dentry
);
502 error
= vfs_readlink(path
.dentry
, buf
, bufsiz
);
506 if (retry_estale(error
, lookup_flags
)) {
507 lookup_flags
|= LOOKUP_REVAL
;
514 SYSCALL_DEFINE4(readlinkat
, int, dfd
, const char __user
*, pathname
,
515 char __user
*, buf
, int, bufsiz
)
517 return do_readlinkat(dfd
, pathname
, buf
, bufsiz
);
520 SYSCALL_DEFINE3(readlink
, const char __user
*, path
, char __user
*, buf
,
523 return do_readlinkat(AT_FDCWD
, path
, buf
, bufsiz
);
527 /* ---------- LFS-64 ----------- */
528 #if defined(__ARCH_WANT_STAT64) || defined(__ARCH_WANT_COMPAT_STAT64)
530 #ifndef INIT_STRUCT_STAT64_PADDING
531 # define INIT_STRUCT_STAT64_PADDING(st) memset(&st, 0, sizeof(st))
534 static long cp_new_stat64(struct kstat
*stat
, struct stat64 __user
*statbuf
)
538 INIT_STRUCT_STAT64_PADDING(tmp
);
540 /* mips has weird padding, so we don't get 64 bits there */
541 tmp
.st_dev
= new_encode_dev(stat
->dev
);
542 tmp
.st_rdev
= new_encode_dev(stat
->rdev
);
544 tmp
.st_dev
= huge_encode_dev(stat
->dev
);
545 tmp
.st_rdev
= huge_encode_dev(stat
->rdev
);
547 tmp
.st_ino
= stat
->ino
;
548 if (sizeof(tmp
.st_ino
) < sizeof(stat
->ino
) && tmp
.st_ino
!= stat
->ino
)
550 #ifdef STAT64_HAS_BROKEN_ST_INO
551 tmp
.__st_ino
= stat
->ino
;
553 tmp
.st_mode
= stat
->mode
;
554 tmp
.st_nlink
= stat
->nlink
;
555 tmp
.st_uid
= from_kuid_munged(current_user_ns(), stat
->uid
);
556 tmp
.st_gid
= from_kgid_munged(current_user_ns(), stat
->gid
);
557 tmp
.st_atime
= stat
->atime
.tv_sec
;
558 tmp
.st_atime_nsec
= stat
->atime
.tv_nsec
;
559 tmp
.st_mtime
= stat
->mtime
.tv_sec
;
560 tmp
.st_mtime_nsec
= stat
->mtime
.tv_nsec
;
561 tmp
.st_ctime
= stat
->ctime
.tv_sec
;
562 tmp
.st_ctime_nsec
= stat
->ctime
.tv_nsec
;
563 tmp
.st_size
= stat
->size
;
564 tmp
.st_blocks
= stat
->blocks
;
565 tmp
.st_blksize
= stat
->blksize
;
566 return copy_to_user(statbuf
,&tmp
,sizeof(tmp
)) ? -EFAULT
: 0;
569 SYSCALL_DEFINE2(stat64
, const char __user
*, filename
,
570 struct stat64 __user
*, statbuf
)
573 int error
= vfs_stat(filename
, &stat
);
576 error
= cp_new_stat64(&stat
, statbuf
);
581 SYSCALL_DEFINE2(lstat64
, const char __user
*, filename
,
582 struct stat64 __user
*, statbuf
)
585 int error
= vfs_lstat(filename
, &stat
);
588 error
= cp_new_stat64(&stat
, statbuf
);
593 SYSCALL_DEFINE2(fstat64
, unsigned long, fd
, struct stat64 __user
*, statbuf
)
596 int error
= vfs_fstat(fd
, &stat
);
599 error
= cp_new_stat64(&stat
, statbuf
);
604 SYSCALL_DEFINE4(fstatat64
, int, dfd
, const char __user
*, filename
,
605 struct stat64 __user
*, statbuf
, int, flag
)
610 error
= vfs_fstatat(dfd
, filename
, &stat
, flag
);
613 return cp_new_stat64(&stat
, statbuf
);
615 #endif /* __ARCH_WANT_STAT64 || __ARCH_WANT_COMPAT_STAT64 */
617 static noinline_for_stack
int
618 cp_statx(const struct kstat
*stat
, struct statx __user
*buffer
)
622 memset(&tmp
, 0, sizeof(tmp
));
624 /* STATX_CHANGE_COOKIE is kernel-only for now */
625 tmp
.stx_mask
= stat
->result_mask
& ~STATX_CHANGE_COOKIE
;
626 tmp
.stx_blksize
= stat
->blksize
;
627 /* STATX_ATTR_CHANGE_MONOTONIC is kernel-only for now */
628 tmp
.stx_attributes
= stat
->attributes
& ~STATX_ATTR_CHANGE_MONOTONIC
;
629 tmp
.stx_nlink
= stat
->nlink
;
630 tmp
.stx_uid
= from_kuid_munged(current_user_ns(), stat
->uid
);
631 tmp
.stx_gid
= from_kgid_munged(current_user_ns(), stat
->gid
);
632 tmp
.stx_mode
= stat
->mode
;
633 tmp
.stx_ino
= stat
->ino
;
634 tmp
.stx_size
= stat
->size
;
635 tmp
.stx_blocks
= stat
->blocks
;
636 tmp
.stx_attributes_mask
= stat
->attributes_mask
;
637 tmp
.stx_atime
.tv_sec
= stat
->atime
.tv_sec
;
638 tmp
.stx_atime
.tv_nsec
= stat
->atime
.tv_nsec
;
639 tmp
.stx_btime
.tv_sec
= stat
->btime
.tv_sec
;
640 tmp
.stx_btime
.tv_nsec
= stat
->btime
.tv_nsec
;
641 tmp
.stx_ctime
.tv_sec
= stat
->ctime
.tv_sec
;
642 tmp
.stx_ctime
.tv_nsec
= stat
->ctime
.tv_nsec
;
643 tmp
.stx_mtime
.tv_sec
= stat
->mtime
.tv_sec
;
644 tmp
.stx_mtime
.tv_nsec
= stat
->mtime
.tv_nsec
;
645 tmp
.stx_rdev_major
= MAJOR(stat
->rdev
);
646 tmp
.stx_rdev_minor
= MINOR(stat
->rdev
);
647 tmp
.stx_dev_major
= MAJOR(stat
->dev
);
648 tmp
.stx_dev_minor
= MINOR(stat
->dev
);
649 tmp
.stx_mnt_id
= stat
->mnt_id
;
650 tmp
.stx_dio_mem_align
= stat
->dio_mem_align
;
651 tmp
.stx_dio_offset_align
= stat
->dio_offset_align
;
653 return copy_to_user(buffer
, &tmp
, sizeof(tmp
)) ? -EFAULT
: 0;
656 int do_statx(int dfd
, struct filename
*filename
, unsigned int flags
,
657 unsigned int mask
, struct statx __user
*buffer
)
662 if (mask
& STATX__RESERVED
)
664 if ((flags
& AT_STATX_SYNC_TYPE
) == AT_STATX_SYNC_TYPE
)
667 /* STATX_CHANGE_COOKIE is kernel-only for now. Ignore requests
670 mask
&= ~STATX_CHANGE_COOKIE
;
672 error
= vfs_statx(dfd
, filename
, flags
, &stat
, mask
);
676 return cp_statx(&stat
, buffer
);
680 * sys_statx - System call to get enhanced stats
681 * @dfd: Base directory to pathwalk from *or* fd to stat.
682 * @filename: File to stat or "" with AT_EMPTY_PATH
683 * @flags: AT_* flags to control pathwalk.
684 * @mask: Parts of statx struct actually required.
685 * @buffer: Result buffer.
687 * Note that fstat() can be emulated by setting dfd to the fd of interest,
688 * supplying "" as the filename and setting AT_EMPTY_PATH in the flags.
690 SYSCALL_DEFINE5(statx
,
691 int, dfd
, const char __user
*, filename
, unsigned, flags
,
693 struct statx __user
*, buffer
)
696 struct filename
*name
;
698 name
= getname_flags(filename
, getname_statx_lookup_flags(flags
), NULL
);
699 ret
= do_statx(dfd
, name
, flags
, mask
, buffer
);
705 #if defined(CONFIG_COMPAT) && defined(__ARCH_WANT_COMPAT_STAT)
706 static int cp_compat_stat(struct kstat
*stat
, struct compat_stat __user
*ubuf
)
708 struct compat_stat tmp
;
710 if (sizeof(tmp
.st_dev
) < 4 && !old_valid_dev(stat
->dev
))
712 if (sizeof(tmp
.st_rdev
) < 4 && !old_valid_dev(stat
->rdev
))
715 memset(&tmp
, 0, sizeof(tmp
));
716 tmp
.st_dev
= new_encode_dev(stat
->dev
);
717 tmp
.st_ino
= stat
->ino
;
718 if (sizeof(tmp
.st_ino
) < sizeof(stat
->ino
) && tmp
.st_ino
!= stat
->ino
)
720 tmp
.st_mode
= stat
->mode
;
721 tmp
.st_nlink
= stat
->nlink
;
722 if (tmp
.st_nlink
!= stat
->nlink
)
724 SET_UID(tmp
.st_uid
, from_kuid_munged(current_user_ns(), stat
->uid
));
725 SET_GID(tmp
.st_gid
, from_kgid_munged(current_user_ns(), stat
->gid
));
726 tmp
.st_rdev
= new_encode_dev(stat
->rdev
);
727 if ((u64
) stat
->size
> MAX_NON_LFS
)
729 tmp
.st_size
= stat
->size
;
730 tmp
.st_atime
= stat
->atime
.tv_sec
;
731 tmp
.st_atime_nsec
= stat
->atime
.tv_nsec
;
732 tmp
.st_mtime
= stat
->mtime
.tv_sec
;
733 tmp
.st_mtime_nsec
= stat
->mtime
.tv_nsec
;
734 tmp
.st_ctime
= stat
->ctime
.tv_sec
;
735 tmp
.st_ctime_nsec
= stat
->ctime
.tv_nsec
;
736 tmp
.st_blocks
= stat
->blocks
;
737 tmp
.st_blksize
= stat
->blksize
;
738 return copy_to_user(ubuf
, &tmp
, sizeof(tmp
)) ? -EFAULT
: 0;
741 COMPAT_SYSCALL_DEFINE2(newstat
, const char __user
*, filename
,
742 struct compat_stat __user
*, statbuf
)
747 error
= vfs_stat(filename
, &stat
);
750 return cp_compat_stat(&stat
, statbuf
);
753 COMPAT_SYSCALL_DEFINE2(newlstat
, const char __user
*, filename
,
754 struct compat_stat __user
*, statbuf
)
759 error
= vfs_lstat(filename
, &stat
);
762 return cp_compat_stat(&stat
, statbuf
);
765 #ifndef __ARCH_WANT_STAT64
766 COMPAT_SYSCALL_DEFINE4(newfstatat
, unsigned int, dfd
,
767 const char __user
*, filename
,
768 struct compat_stat __user
*, statbuf
, int, flag
)
773 error
= vfs_fstatat(dfd
, filename
, &stat
, flag
);
776 return cp_compat_stat(&stat
, statbuf
);
780 COMPAT_SYSCALL_DEFINE2(newfstat
, unsigned int, fd
,
781 struct compat_stat __user
*, statbuf
)
784 int error
= vfs_fstat(fd
, &stat
);
787 error
= cp_compat_stat(&stat
, statbuf
);
792 /* Caller is here responsible for sufficient locking (ie. inode->i_lock) */
793 void __inode_add_bytes(struct inode
*inode
, loff_t bytes
)
795 inode
->i_blocks
+= bytes
>> 9;
797 inode
->i_bytes
+= bytes
;
798 if (inode
->i_bytes
>= 512) {
800 inode
->i_bytes
-= 512;
803 EXPORT_SYMBOL(__inode_add_bytes
);
805 void inode_add_bytes(struct inode
*inode
, loff_t bytes
)
807 spin_lock(&inode
->i_lock
);
808 __inode_add_bytes(inode
, bytes
);
809 spin_unlock(&inode
->i_lock
);
812 EXPORT_SYMBOL(inode_add_bytes
);
814 void __inode_sub_bytes(struct inode
*inode
, loff_t bytes
)
816 inode
->i_blocks
-= bytes
>> 9;
818 if (inode
->i_bytes
< bytes
) {
820 inode
->i_bytes
+= 512;
822 inode
->i_bytes
-= bytes
;
825 EXPORT_SYMBOL(__inode_sub_bytes
);
827 void inode_sub_bytes(struct inode
*inode
, loff_t bytes
)
829 spin_lock(&inode
->i_lock
);
830 __inode_sub_bytes(inode
, bytes
);
831 spin_unlock(&inode
->i_lock
);
834 EXPORT_SYMBOL(inode_sub_bytes
);
836 loff_t
inode_get_bytes(struct inode
*inode
)
840 spin_lock(&inode
->i_lock
);
841 ret
= __inode_get_bytes(inode
);
842 spin_unlock(&inode
->i_lock
);
846 EXPORT_SYMBOL(inode_get_bytes
);
848 void inode_set_bytes(struct inode
*inode
, loff_t bytes
)
850 /* Caller is here responsible for sufficient locking
851 * (ie. inode->i_lock) */
852 inode
->i_blocks
= bytes
>> 9;
853 inode
->i_bytes
= bytes
& 511;
856 EXPORT_SYMBOL(inode_set_bytes
);