]>
git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - fs/stat.c
1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (C) 1991, 1992 Linus Torvalds
8 #include <linux/export.h>
10 #include <linux/errno.h>
11 #include <linux/file.h>
12 #include <linux/highuid.h>
14 #include <linux/namei.h>
15 #include <linux/security.h>
16 #include <linux/cred.h>
17 #include <linux/syscalls.h>
18 #include <linux/pagemap.h>
19 #include <linux/compat.h>
21 #include <linux/uaccess.h>
22 #include <asm/unistd.h>
28 * generic_fillattr - Fill in the basic attributes from the inode struct
29 * @mnt_userns: user namespace of the mount the inode was found from
30 * @inode: Inode to use as the source
31 * @stat: Where to fill in the attributes
33 * Fill in the basic attributes in the kstat structure from data that's to be
34 * found on the VFS inode structure. This is the default if no getattr inode
35 * operation is supplied.
37 * If the inode has been found through an idmapped mount the user namespace of
38 * the vfsmount must be passed through @mnt_userns. This function will then
39 * take care to map the inode according to @mnt_userns before filling in the
40 * uid and gid filds. On non-idmapped mounts or if permission checking is to be
41 * performed on the raw inode simply passs init_user_ns.
43 void generic_fillattr(struct user_namespace
*mnt_userns
, struct inode
*inode
,
46 stat
->dev
= inode
->i_sb
->s_dev
;
47 stat
->ino
= inode
->i_ino
;
48 stat
->mode
= inode
->i_mode
;
49 stat
->nlink
= inode
->i_nlink
;
50 stat
->uid
= i_uid_into_mnt(mnt_userns
, inode
);
51 stat
->gid
= i_gid_into_mnt(mnt_userns
, inode
);
52 stat
->rdev
= inode
->i_rdev
;
53 stat
->size
= i_size_read(inode
);
54 stat
->atime
= inode
->i_atime
;
55 stat
->mtime
= inode
->i_mtime
;
56 stat
->ctime
= inode
->i_ctime
;
57 stat
->blksize
= i_blocksize(inode
);
58 stat
->blocks
= inode
->i_blocks
;
60 EXPORT_SYMBOL(generic_fillattr
);
63 * generic_fill_statx_attr - Fill in the statx attributes from the inode flags
64 * @inode: Inode to use as the source
65 * @stat: Where to fill in the attribute flags
67 * Fill in the STATX_ATTR_* flags in the kstat structure for properties of the
68 * inode that are published on i_flags and enforced by the VFS.
70 void generic_fill_statx_attr(struct inode
*inode
, struct kstat
*stat
)
72 if (inode
->i_flags
& S_IMMUTABLE
)
73 stat
->attributes
|= STATX_ATTR_IMMUTABLE
;
74 if (inode
->i_flags
& S_APPEND
)
75 stat
->attributes
|= STATX_ATTR_APPEND
;
76 stat
->attributes_mask
|= KSTAT_ATTR_VFS_FLAGS
;
78 EXPORT_SYMBOL(generic_fill_statx_attr
);
81 * vfs_getattr_nosec - getattr without security checks
82 * @path: file to get attributes from
83 * @stat: structure to return attributes in
84 * @request_mask: STATX_xxx flags indicating what the caller wants
85 * @query_flags: Query mode (AT_STATX_SYNC_TYPE)
87 * Get attributes without calling security_inode_getattr.
89 * Currently the only caller other than vfs_getattr is internal to the
90 * filehandle lookup code, which uses only the inode number and returns no
91 * attributes to any user. Any other code probably wants vfs_getattr.
93 int vfs_getattr_nosec(const struct path
*path
, struct kstat
*stat
,
94 u32 request_mask
, unsigned int query_flags
)
96 struct user_namespace
*mnt_userns
;
97 struct inode
*inode
= d_backing_inode(path
->dentry
);
99 memset(stat
, 0, sizeof(*stat
));
100 stat
->result_mask
|= STATX_BASIC_STATS
;
101 query_flags
&= AT_STATX_SYNC_TYPE
;
103 /* allow the fs to override these if it really wants to */
104 /* SB_NOATIME means filesystem supplies dummy atime value */
105 if (inode
->i_sb
->s_flags
& SB_NOATIME
)
106 stat
->result_mask
&= ~STATX_ATIME
;
109 * Note: If you add another clause to set an attribute flag, please
110 * update attributes_mask below.
112 if (IS_AUTOMOUNT(inode
))
113 stat
->attributes
|= STATX_ATTR_AUTOMOUNT
;
116 stat
->attributes
|= STATX_ATTR_DAX
;
118 stat
->attributes_mask
|= (STATX_ATTR_AUTOMOUNT
|
121 mnt_userns
= mnt_user_ns(path
->mnt
);
122 if (inode
->i_op
->getattr
)
123 return inode
->i_op
->getattr(mnt_userns
, path
, stat
,
124 request_mask
, query_flags
);
126 generic_fillattr(mnt_userns
, inode
, stat
);
129 EXPORT_SYMBOL(vfs_getattr_nosec
);
132 * vfs_getattr - Get the enhanced basic attributes of a file
133 * @path: The file of interest
134 * @stat: Where to return the statistics
135 * @request_mask: STATX_xxx flags indicating what the caller wants
136 * @query_flags: Query mode (AT_STATX_SYNC_TYPE)
138 * Ask the filesystem for a file's attributes. The caller must indicate in
139 * request_mask and query_flags to indicate what they want.
141 * If the file is remote, the filesystem can be forced to update the attributes
142 * from the backing store by passing AT_STATX_FORCE_SYNC in query_flags or can
143 * suppress the update by passing AT_STATX_DONT_SYNC.
145 * Bits must have been set in request_mask to indicate which attributes the
146 * caller wants retrieving. Any such attribute not requested may be returned
147 * anyway, but the value may be approximate, and, if remote, may not have been
148 * synchronised with the server.
150 * 0 will be returned on success, and a -ve error code if unsuccessful.
152 int vfs_getattr(const struct path
*path
, struct kstat
*stat
,
153 u32 request_mask
, unsigned int query_flags
)
157 retval
= security_inode_getattr(path
);
160 return vfs_getattr_nosec(path
, stat
, request_mask
, query_flags
);
162 EXPORT_SYMBOL(vfs_getattr
);
165 * vfs_fstat - Get the basic attributes by file descriptor
166 * @fd: The file descriptor referring to the file of interest
167 * @stat: The result structure to fill in.
169 * This function is a wrapper around vfs_getattr(). The main difference is
170 * that it uses a file descriptor to determine the file location.
172 * 0 will be returned on success, and a -ve error code if unsuccessful.
174 int vfs_fstat(int fd
, struct kstat
*stat
)
182 error
= vfs_getattr(&f
.file
->f_path
, stat
, STATX_BASIC_STATS
, 0);
188 * vfs_statx - Get basic and extra attributes by filename
189 * @dfd: A file descriptor representing the base dir for a relative filename
190 * @filename: The name of the file of interest
191 * @flags: Flags to control the query
192 * @stat: The result structure to fill in.
193 * @request_mask: STATX_xxx flags indicating what the caller wants
195 * This function is a wrapper around vfs_getattr(). The main difference is
196 * that it uses a filename and base directory to determine the file location.
197 * Additionally, the use of AT_SYMLINK_NOFOLLOW in flags will prevent a symlink
198 * at the given name from being referenced.
200 * 0 will be returned on success, and a -ve error code if unsuccessful.
202 static int vfs_statx(int dfd
, const char __user
*filename
, int flags
,
203 struct kstat
*stat
, u32 request_mask
)
206 unsigned lookup_flags
= 0;
209 if (flags
& ~(AT_SYMLINK_NOFOLLOW
| AT_NO_AUTOMOUNT
| AT_EMPTY_PATH
|
213 if (!(flags
& AT_SYMLINK_NOFOLLOW
))
214 lookup_flags
|= LOOKUP_FOLLOW
;
215 if (!(flags
& AT_NO_AUTOMOUNT
))
216 lookup_flags
|= LOOKUP_AUTOMOUNT
;
217 if (flags
& AT_EMPTY_PATH
)
218 lookup_flags
|= LOOKUP_EMPTY
;
221 error
= user_path_at(dfd
, filename
, lookup_flags
, &path
);
225 error
= vfs_getattr(&path
, stat
, request_mask
, flags
);
226 stat
->mnt_id
= real_mount(path
.mnt
)->mnt_id
;
227 stat
->result_mask
|= STATX_MNT_ID
;
228 if (path
.mnt
->mnt_root
== path
.dentry
)
229 stat
->attributes
|= STATX_ATTR_MOUNT_ROOT
;
230 stat
->attributes_mask
|= STATX_ATTR_MOUNT_ROOT
;
232 if (retry_estale(error
, lookup_flags
)) {
233 lookup_flags
|= LOOKUP_REVAL
;
240 int vfs_fstatat(int dfd
, const char __user
*filename
,
241 struct kstat
*stat
, int flags
)
243 return vfs_statx(dfd
, filename
, flags
| AT_NO_AUTOMOUNT
,
244 stat
, STATX_BASIC_STATS
);
247 #ifdef __ARCH_WANT_OLD_STAT
250 * For backward compatibility? Maybe this should be moved
251 * into arch/i386 instead?
253 static int cp_old_stat(struct kstat
*stat
, struct __old_kernel_stat __user
* statbuf
)
255 static int warncount
= 5;
256 struct __old_kernel_stat tmp
;
260 printk(KERN_WARNING
"VFS: Warning: %s using old stat() call. Recompile your binary.\n",
262 } else if (warncount
< 0) {
263 /* it's laughable, but... */
267 memset(&tmp
, 0, sizeof(struct __old_kernel_stat
));
268 tmp
.st_dev
= old_encode_dev(stat
->dev
);
269 tmp
.st_ino
= stat
->ino
;
270 if (sizeof(tmp
.st_ino
) < sizeof(stat
->ino
) && tmp
.st_ino
!= stat
->ino
)
272 tmp
.st_mode
= stat
->mode
;
273 tmp
.st_nlink
= stat
->nlink
;
274 if (tmp
.st_nlink
!= stat
->nlink
)
276 SET_UID(tmp
.st_uid
, from_kuid_munged(current_user_ns(), stat
->uid
));
277 SET_GID(tmp
.st_gid
, from_kgid_munged(current_user_ns(), stat
->gid
));
278 tmp
.st_rdev
= old_encode_dev(stat
->rdev
);
279 #if BITS_PER_LONG == 32
280 if (stat
->size
> MAX_NON_LFS
)
283 tmp
.st_size
= stat
->size
;
284 tmp
.st_atime
= stat
->atime
.tv_sec
;
285 tmp
.st_mtime
= stat
->mtime
.tv_sec
;
286 tmp
.st_ctime
= stat
->ctime
.tv_sec
;
287 return copy_to_user(statbuf
,&tmp
,sizeof(tmp
)) ? -EFAULT
: 0;
290 SYSCALL_DEFINE2(stat
, const char __user
*, filename
,
291 struct __old_kernel_stat __user
*, statbuf
)
296 error
= vfs_stat(filename
, &stat
);
300 return cp_old_stat(&stat
, statbuf
);
303 SYSCALL_DEFINE2(lstat
, const char __user
*, filename
,
304 struct __old_kernel_stat __user
*, statbuf
)
309 error
= vfs_lstat(filename
, &stat
);
313 return cp_old_stat(&stat
, statbuf
);
316 SYSCALL_DEFINE2(fstat
, unsigned int, fd
, struct __old_kernel_stat __user
*, statbuf
)
319 int error
= vfs_fstat(fd
, &stat
);
322 error
= cp_old_stat(&stat
, statbuf
);
327 #endif /* __ARCH_WANT_OLD_STAT */
329 #ifdef __ARCH_WANT_NEW_STAT
331 #if BITS_PER_LONG == 32
332 # define choose_32_64(a,b) a
334 # define choose_32_64(a,b) b
337 #define valid_dev(x) choose_32_64(old_valid_dev(x),true)
338 #define encode_dev(x) choose_32_64(old_encode_dev,new_encode_dev)(x)
340 #ifndef INIT_STRUCT_STAT_PADDING
341 # define INIT_STRUCT_STAT_PADDING(st) memset(&st, 0, sizeof(st))
344 static int cp_new_stat(struct kstat
*stat
, struct stat __user
*statbuf
)
348 if (!valid_dev(stat
->dev
) || !valid_dev(stat
->rdev
))
350 #if BITS_PER_LONG == 32
351 if (stat
->size
> MAX_NON_LFS
)
355 INIT_STRUCT_STAT_PADDING(tmp
);
356 tmp
.st_dev
= encode_dev(stat
->dev
);
357 tmp
.st_ino
= stat
->ino
;
358 if (sizeof(tmp
.st_ino
) < sizeof(stat
->ino
) && tmp
.st_ino
!= stat
->ino
)
360 tmp
.st_mode
= stat
->mode
;
361 tmp
.st_nlink
= stat
->nlink
;
362 if (tmp
.st_nlink
!= stat
->nlink
)
364 SET_UID(tmp
.st_uid
, from_kuid_munged(current_user_ns(), stat
->uid
));
365 SET_GID(tmp
.st_gid
, from_kgid_munged(current_user_ns(), stat
->gid
));
366 tmp
.st_rdev
= encode_dev(stat
->rdev
);
367 tmp
.st_size
= stat
->size
;
368 tmp
.st_atime
= stat
->atime
.tv_sec
;
369 tmp
.st_mtime
= stat
->mtime
.tv_sec
;
370 tmp
.st_ctime
= stat
->ctime
.tv_sec
;
371 #ifdef STAT_HAVE_NSEC
372 tmp
.st_atime_nsec
= stat
->atime
.tv_nsec
;
373 tmp
.st_mtime_nsec
= stat
->mtime
.tv_nsec
;
374 tmp
.st_ctime_nsec
= stat
->ctime
.tv_nsec
;
376 tmp
.st_blocks
= stat
->blocks
;
377 tmp
.st_blksize
= stat
->blksize
;
378 return copy_to_user(statbuf
,&tmp
,sizeof(tmp
)) ? -EFAULT
: 0;
381 SYSCALL_DEFINE2(newstat
, const char __user
*, filename
,
382 struct stat __user
*, statbuf
)
385 int error
= vfs_stat(filename
, &stat
);
389 return cp_new_stat(&stat
, statbuf
);
392 SYSCALL_DEFINE2(newlstat
, const char __user
*, filename
,
393 struct stat __user
*, statbuf
)
398 error
= vfs_lstat(filename
, &stat
);
402 return cp_new_stat(&stat
, statbuf
);
405 #if !defined(__ARCH_WANT_STAT64) || defined(__ARCH_WANT_SYS_NEWFSTATAT)
406 SYSCALL_DEFINE4(newfstatat
, int, dfd
, const char __user
*, filename
,
407 struct stat __user
*, statbuf
, int, flag
)
412 error
= vfs_fstatat(dfd
, filename
, &stat
, flag
);
415 return cp_new_stat(&stat
, statbuf
);
419 SYSCALL_DEFINE2(newfstat
, unsigned int, fd
, struct stat __user
*, statbuf
)
422 int error
= vfs_fstat(fd
, &stat
);
425 error
= cp_new_stat(&stat
, statbuf
);
431 static int do_readlinkat(int dfd
, const char __user
*pathname
,
432 char __user
*buf
, int bufsiz
)
437 unsigned int lookup_flags
= LOOKUP_EMPTY
;
443 error
= user_path_at_empty(dfd
, pathname
, lookup_flags
, &path
, &empty
);
445 struct inode
*inode
= d_backing_inode(path
.dentry
);
447 error
= empty
? -ENOENT
: -EINVAL
;
449 * AFS mountpoints allow readlink(2) but are not symlinks
451 if (d_is_symlink(path
.dentry
) || inode
->i_op
->readlink
) {
452 error
= security_inode_readlink(path
.dentry
);
455 error
= vfs_readlink(path
.dentry
, buf
, bufsiz
);
459 if (retry_estale(error
, lookup_flags
)) {
460 lookup_flags
|= LOOKUP_REVAL
;
467 SYSCALL_DEFINE4(readlinkat
, int, dfd
, const char __user
*, pathname
,
468 char __user
*, buf
, int, bufsiz
)
470 return do_readlinkat(dfd
, pathname
, buf
, bufsiz
);
473 SYSCALL_DEFINE3(readlink
, const char __user
*, path
, char __user
*, buf
,
476 return do_readlinkat(AT_FDCWD
, path
, buf
, bufsiz
);
480 /* ---------- LFS-64 ----------- */
481 #if defined(__ARCH_WANT_STAT64) || defined(__ARCH_WANT_COMPAT_STAT64)
483 #ifndef INIT_STRUCT_STAT64_PADDING
484 # define INIT_STRUCT_STAT64_PADDING(st) memset(&st, 0, sizeof(st))
487 static long cp_new_stat64(struct kstat
*stat
, struct stat64 __user
*statbuf
)
491 INIT_STRUCT_STAT64_PADDING(tmp
);
493 /* mips has weird padding, so we don't get 64 bits there */
494 tmp
.st_dev
= new_encode_dev(stat
->dev
);
495 tmp
.st_rdev
= new_encode_dev(stat
->rdev
);
497 tmp
.st_dev
= huge_encode_dev(stat
->dev
);
498 tmp
.st_rdev
= huge_encode_dev(stat
->rdev
);
500 tmp
.st_ino
= stat
->ino
;
501 if (sizeof(tmp
.st_ino
) < sizeof(stat
->ino
) && tmp
.st_ino
!= stat
->ino
)
503 #ifdef STAT64_HAS_BROKEN_ST_INO
504 tmp
.__st_ino
= stat
->ino
;
506 tmp
.st_mode
= stat
->mode
;
507 tmp
.st_nlink
= stat
->nlink
;
508 tmp
.st_uid
= from_kuid_munged(current_user_ns(), stat
->uid
);
509 tmp
.st_gid
= from_kgid_munged(current_user_ns(), stat
->gid
);
510 tmp
.st_atime
= stat
->atime
.tv_sec
;
511 tmp
.st_atime_nsec
= stat
->atime
.tv_nsec
;
512 tmp
.st_mtime
= stat
->mtime
.tv_sec
;
513 tmp
.st_mtime_nsec
= stat
->mtime
.tv_nsec
;
514 tmp
.st_ctime
= stat
->ctime
.tv_sec
;
515 tmp
.st_ctime_nsec
= stat
->ctime
.tv_nsec
;
516 tmp
.st_size
= stat
->size
;
517 tmp
.st_blocks
= stat
->blocks
;
518 tmp
.st_blksize
= stat
->blksize
;
519 return copy_to_user(statbuf
,&tmp
,sizeof(tmp
)) ? -EFAULT
: 0;
522 SYSCALL_DEFINE2(stat64
, const char __user
*, filename
,
523 struct stat64 __user
*, statbuf
)
526 int error
= vfs_stat(filename
, &stat
);
529 error
= cp_new_stat64(&stat
, statbuf
);
534 SYSCALL_DEFINE2(lstat64
, const char __user
*, filename
,
535 struct stat64 __user
*, statbuf
)
538 int error
= vfs_lstat(filename
, &stat
);
541 error
= cp_new_stat64(&stat
, statbuf
);
546 SYSCALL_DEFINE2(fstat64
, unsigned long, fd
, struct stat64 __user
*, statbuf
)
549 int error
= vfs_fstat(fd
, &stat
);
552 error
= cp_new_stat64(&stat
, statbuf
);
557 SYSCALL_DEFINE4(fstatat64
, int, dfd
, const char __user
*, filename
,
558 struct stat64 __user
*, statbuf
, int, flag
)
563 error
= vfs_fstatat(dfd
, filename
, &stat
, flag
);
566 return cp_new_stat64(&stat
, statbuf
);
568 #endif /* __ARCH_WANT_STAT64 || __ARCH_WANT_COMPAT_STAT64 */
570 static noinline_for_stack
int
571 cp_statx(const struct kstat
*stat
, struct statx __user
*buffer
)
575 memset(&tmp
, 0, sizeof(tmp
));
577 tmp
.stx_mask
= stat
->result_mask
;
578 tmp
.stx_blksize
= stat
->blksize
;
579 tmp
.stx_attributes
= stat
->attributes
;
580 tmp
.stx_nlink
= stat
->nlink
;
581 tmp
.stx_uid
= from_kuid_munged(current_user_ns(), stat
->uid
);
582 tmp
.stx_gid
= from_kgid_munged(current_user_ns(), stat
->gid
);
583 tmp
.stx_mode
= stat
->mode
;
584 tmp
.stx_ino
= stat
->ino
;
585 tmp
.stx_size
= stat
->size
;
586 tmp
.stx_blocks
= stat
->blocks
;
587 tmp
.stx_attributes_mask
= stat
->attributes_mask
;
588 tmp
.stx_atime
.tv_sec
= stat
->atime
.tv_sec
;
589 tmp
.stx_atime
.tv_nsec
= stat
->atime
.tv_nsec
;
590 tmp
.stx_btime
.tv_sec
= stat
->btime
.tv_sec
;
591 tmp
.stx_btime
.tv_nsec
= stat
->btime
.tv_nsec
;
592 tmp
.stx_ctime
.tv_sec
= stat
->ctime
.tv_sec
;
593 tmp
.stx_ctime
.tv_nsec
= stat
->ctime
.tv_nsec
;
594 tmp
.stx_mtime
.tv_sec
= stat
->mtime
.tv_sec
;
595 tmp
.stx_mtime
.tv_nsec
= stat
->mtime
.tv_nsec
;
596 tmp
.stx_rdev_major
= MAJOR(stat
->rdev
);
597 tmp
.stx_rdev_minor
= MINOR(stat
->rdev
);
598 tmp
.stx_dev_major
= MAJOR(stat
->dev
);
599 tmp
.stx_dev_minor
= MINOR(stat
->dev
);
600 tmp
.stx_mnt_id
= stat
->mnt_id
;
602 return copy_to_user(buffer
, &tmp
, sizeof(tmp
)) ? -EFAULT
: 0;
605 int do_statx(int dfd
, const char __user
*filename
, unsigned flags
,
606 unsigned int mask
, struct statx __user
*buffer
)
611 if (mask
& STATX__RESERVED
)
613 if ((flags
& AT_STATX_SYNC_TYPE
) == AT_STATX_SYNC_TYPE
)
616 error
= vfs_statx(dfd
, filename
, flags
, &stat
, mask
);
620 return cp_statx(&stat
, buffer
);
624 * sys_statx - System call to get enhanced stats
625 * @dfd: Base directory to pathwalk from *or* fd to stat.
626 * @filename: File to stat or "" with AT_EMPTY_PATH
627 * @flags: AT_* flags to control pathwalk.
628 * @mask: Parts of statx struct actually required.
629 * @buffer: Result buffer.
631 * Note that fstat() can be emulated by setting dfd to the fd of interest,
632 * supplying "" as the filename and setting AT_EMPTY_PATH in the flags.
634 SYSCALL_DEFINE5(statx
,
635 int, dfd
, const char __user
*, filename
, unsigned, flags
,
637 struct statx __user
*, buffer
)
639 return do_statx(dfd
, filename
, flags
, mask
, buffer
);
643 static int cp_compat_stat(struct kstat
*stat
, struct compat_stat __user
*ubuf
)
645 struct compat_stat tmp
;
647 if (!old_valid_dev(stat
->dev
) || !old_valid_dev(stat
->rdev
))
650 memset(&tmp
, 0, sizeof(tmp
));
651 tmp
.st_dev
= old_encode_dev(stat
->dev
);
652 tmp
.st_ino
= stat
->ino
;
653 if (sizeof(tmp
.st_ino
) < sizeof(stat
->ino
) && tmp
.st_ino
!= stat
->ino
)
655 tmp
.st_mode
= stat
->mode
;
656 tmp
.st_nlink
= stat
->nlink
;
657 if (tmp
.st_nlink
!= stat
->nlink
)
659 SET_UID(tmp
.st_uid
, from_kuid_munged(current_user_ns(), stat
->uid
));
660 SET_GID(tmp
.st_gid
, from_kgid_munged(current_user_ns(), stat
->gid
));
661 tmp
.st_rdev
= old_encode_dev(stat
->rdev
);
662 if ((u64
) stat
->size
> MAX_NON_LFS
)
664 tmp
.st_size
= stat
->size
;
665 tmp
.st_atime
= stat
->atime
.tv_sec
;
666 tmp
.st_atime_nsec
= stat
->atime
.tv_nsec
;
667 tmp
.st_mtime
= stat
->mtime
.tv_sec
;
668 tmp
.st_mtime_nsec
= stat
->mtime
.tv_nsec
;
669 tmp
.st_ctime
= stat
->ctime
.tv_sec
;
670 tmp
.st_ctime_nsec
= stat
->ctime
.tv_nsec
;
671 tmp
.st_blocks
= stat
->blocks
;
672 tmp
.st_blksize
= stat
->blksize
;
673 return copy_to_user(ubuf
, &tmp
, sizeof(tmp
)) ? -EFAULT
: 0;
676 COMPAT_SYSCALL_DEFINE2(newstat
, const char __user
*, filename
,
677 struct compat_stat __user
*, statbuf
)
682 error
= vfs_stat(filename
, &stat
);
685 return cp_compat_stat(&stat
, statbuf
);
688 COMPAT_SYSCALL_DEFINE2(newlstat
, const char __user
*, filename
,
689 struct compat_stat __user
*, statbuf
)
694 error
= vfs_lstat(filename
, &stat
);
697 return cp_compat_stat(&stat
, statbuf
);
700 #ifndef __ARCH_WANT_STAT64
701 COMPAT_SYSCALL_DEFINE4(newfstatat
, unsigned int, dfd
,
702 const char __user
*, filename
,
703 struct compat_stat __user
*, statbuf
, int, flag
)
708 error
= vfs_fstatat(dfd
, filename
, &stat
, flag
);
711 return cp_compat_stat(&stat
, statbuf
);
715 COMPAT_SYSCALL_DEFINE2(newfstat
, unsigned int, fd
,
716 struct compat_stat __user
*, statbuf
)
719 int error
= vfs_fstat(fd
, &stat
);
722 error
= cp_compat_stat(&stat
, statbuf
);
727 /* Caller is here responsible for sufficient locking (ie. inode->i_lock) */
728 void __inode_add_bytes(struct inode
*inode
, loff_t bytes
)
730 inode
->i_blocks
+= bytes
>> 9;
732 inode
->i_bytes
+= bytes
;
733 if (inode
->i_bytes
>= 512) {
735 inode
->i_bytes
-= 512;
738 EXPORT_SYMBOL(__inode_add_bytes
);
740 void inode_add_bytes(struct inode
*inode
, loff_t bytes
)
742 spin_lock(&inode
->i_lock
);
743 __inode_add_bytes(inode
, bytes
);
744 spin_unlock(&inode
->i_lock
);
747 EXPORT_SYMBOL(inode_add_bytes
);
749 void __inode_sub_bytes(struct inode
*inode
, loff_t bytes
)
751 inode
->i_blocks
-= bytes
>> 9;
753 if (inode
->i_bytes
< bytes
) {
755 inode
->i_bytes
+= 512;
757 inode
->i_bytes
-= bytes
;
760 EXPORT_SYMBOL(__inode_sub_bytes
);
762 void inode_sub_bytes(struct inode
*inode
, loff_t bytes
)
764 spin_lock(&inode
->i_lock
);
765 __inode_sub_bytes(inode
, bytes
);
766 spin_unlock(&inode
->i_lock
);
769 EXPORT_SYMBOL(inode_sub_bytes
);
771 loff_t
inode_get_bytes(struct inode
*inode
)
775 spin_lock(&inode
->i_lock
);
776 ret
= __inode_get_bytes(inode
);
777 spin_unlock(&inode
->i_lock
);
781 EXPORT_SYMBOL(inode_get_bytes
);
783 void inode_set_bytes(struct inode
*inode
, loff_t bytes
)
785 /* Caller is here responsible for sufficient locking
786 * (ie. inode->i_lock) */
787 inode
->i_blocks
= bytes
>> 9;
788 inode
->i_bytes
= bytes
& 511;
791 EXPORT_SYMBOL(inode_set_bytes
);