]>
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 #ifndef INIT_STRUCT_STAT_PADDING
338 # define INIT_STRUCT_STAT_PADDING(st) memset(&st, 0, sizeof(st))
341 static int cp_new_stat(struct kstat
*stat
, struct stat __user
*statbuf
)
345 if (sizeof(tmp
.st_dev
) < 4 && !old_valid_dev(stat
->dev
))
347 if (sizeof(tmp
.st_rdev
) < 4 && !old_valid_dev(stat
->rdev
))
349 #if BITS_PER_LONG == 32
350 if (stat
->size
> MAX_NON_LFS
)
354 INIT_STRUCT_STAT_PADDING(tmp
);
355 tmp
.st_dev
= new_encode_dev(stat
->dev
);
356 tmp
.st_ino
= stat
->ino
;
357 if (sizeof(tmp
.st_ino
) < sizeof(stat
->ino
) && tmp
.st_ino
!= stat
->ino
)
359 tmp
.st_mode
= stat
->mode
;
360 tmp
.st_nlink
= stat
->nlink
;
361 if (tmp
.st_nlink
!= stat
->nlink
)
363 SET_UID(tmp
.st_uid
, from_kuid_munged(current_user_ns(), stat
->uid
));
364 SET_GID(tmp
.st_gid
, from_kgid_munged(current_user_ns(), stat
->gid
));
365 tmp
.st_rdev
= new_encode_dev(stat
->rdev
);
366 tmp
.st_size
= stat
->size
;
367 tmp
.st_atime
= stat
->atime
.tv_sec
;
368 tmp
.st_mtime
= stat
->mtime
.tv_sec
;
369 tmp
.st_ctime
= stat
->ctime
.tv_sec
;
370 #ifdef STAT_HAVE_NSEC
371 tmp
.st_atime_nsec
= stat
->atime
.tv_nsec
;
372 tmp
.st_mtime_nsec
= stat
->mtime
.tv_nsec
;
373 tmp
.st_ctime_nsec
= stat
->ctime
.tv_nsec
;
375 tmp
.st_blocks
= stat
->blocks
;
376 tmp
.st_blksize
= stat
->blksize
;
377 return copy_to_user(statbuf
,&tmp
,sizeof(tmp
)) ? -EFAULT
: 0;
380 SYSCALL_DEFINE2(newstat
, const char __user
*, filename
,
381 struct stat __user
*, statbuf
)
384 int error
= vfs_stat(filename
, &stat
);
388 return cp_new_stat(&stat
, statbuf
);
391 SYSCALL_DEFINE2(newlstat
, const char __user
*, filename
,
392 struct stat __user
*, statbuf
)
397 error
= vfs_lstat(filename
, &stat
);
401 return cp_new_stat(&stat
, statbuf
);
404 #if !defined(__ARCH_WANT_STAT64) || defined(__ARCH_WANT_SYS_NEWFSTATAT)
405 SYSCALL_DEFINE4(newfstatat
, int, dfd
, const char __user
*, filename
,
406 struct stat __user
*, statbuf
, int, flag
)
411 error
= vfs_fstatat(dfd
, filename
, &stat
, flag
);
414 return cp_new_stat(&stat
, statbuf
);
418 SYSCALL_DEFINE2(newfstat
, unsigned int, fd
, struct stat __user
*, statbuf
)
421 int error
= vfs_fstat(fd
, &stat
);
424 error
= cp_new_stat(&stat
, statbuf
);
430 static int do_readlinkat(int dfd
, const char __user
*pathname
,
431 char __user
*buf
, int bufsiz
)
436 unsigned int lookup_flags
= LOOKUP_EMPTY
;
442 error
= user_path_at_empty(dfd
, pathname
, lookup_flags
, &path
, &empty
);
444 struct inode
*inode
= d_backing_inode(path
.dentry
);
446 error
= empty
? -ENOENT
: -EINVAL
;
448 * AFS mountpoints allow readlink(2) but are not symlinks
450 if (d_is_symlink(path
.dentry
) || inode
->i_op
->readlink
) {
451 error
= security_inode_readlink(path
.dentry
);
454 error
= vfs_readlink(path
.dentry
, buf
, bufsiz
);
458 if (retry_estale(error
, lookup_flags
)) {
459 lookup_flags
|= LOOKUP_REVAL
;
466 SYSCALL_DEFINE4(readlinkat
, int, dfd
, const char __user
*, pathname
,
467 char __user
*, buf
, int, bufsiz
)
469 return do_readlinkat(dfd
, pathname
, buf
, bufsiz
);
472 SYSCALL_DEFINE3(readlink
, const char __user
*, path
, char __user
*, buf
,
475 return do_readlinkat(AT_FDCWD
, path
, buf
, bufsiz
);
479 /* ---------- LFS-64 ----------- */
480 #if defined(__ARCH_WANT_STAT64) || defined(__ARCH_WANT_COMPAT_STAT64)
482 #ifndef INIT_STRUCT_STAT64_PADDING
483 # define INIT_STRUCT_STAT64_PADDING(st) memset(&st, 0, sizeof(st))
486 static long cp_new_stat64(struct kstat
*stat
, struct stat64 __user
*statbuf
)
490 INIT_STRUCT_STAT64_PADDING(tmp
);
492 /* mips has weird padding, so we don't get 64 bits there */
493 tmp
.st_dev
= new_encode_dev(stat
->dev
);
494 tmp
.st_rdev
= new_encode_dev(stat
->rdev
);
496 tmp
.st_dev
= huge_encode_dev(stat
->dev
);
497 tmp
.st_rdev
= huge_encode_dev(stat
->rdev
);
499 tmp
.st_ino
= stat
->ino
;
500 if (sizeof(tmp
.st_ino
) < sizeof(stat
->ino
) && tmp
.st_ino
!= stat
->ino
)
502 #ifdef STAT64_HAS_BROKEN_ST_INO
503 tmp
.__st_ino
= stat
->ino
;
505 tmp
.st_mode
= stat
->mode
;
506 tmp
.st_nlink
= stat
->nlink
;
507 tmp
.st_uid
= from_kuid_munged(current_user_ns(), stat
->uid
);
508 tmp
.st_gid
= from_kgid_munged(current_user_ns(), stat
->gid
);
509 tmp
.st_atime
= stat
->atime
.tv_sec
;
510 tmp
.st_atime_nsec
= stat
->atime
.tv_nsec
;
511 tmp
.st_mtime
= stat
->mtime
.tv_sec
;
512 tmp
.st_mtime_nsec
= stat
->mtime
.tv_nsec
;
513 tmp
.st_ctime
= stat
->ctime
.tv_sec
;
514 tmp
.st_ctime_nsec
= stat
->ctime
.tv_nsec
;
515 tmp
.st_size
= stat
->size
;
516 tmp
.st_blocks
= stat
->blocks
;
517 tmp
.st_blksize
= stat
->blksize
;
518 return copy_to_user(statbuf
,&tmp
,sizeof(tmp
)) ? -EFAULT
: 0;
521 SYSCALL_DEFINE2(stat64
, const char __user
*, filename
,
522 struct stat64 __user
*, statbuf
)
525 int error
= vfs_stat(filename
, &stat
);
528 error
= cp_new_stat64(&stat
, statbuf
);
533 SYSCALL_DEFINE2(lstat64
, const char __user
*, filename
,
534 struct stat64 __user
*, statbuf
)
537 int error
= vfs_lstat(filename
, &stat
);
540 error
= cp_new_stat64(&stat
, statbuf
);
545 SYSCALL_DEFINE2(fstat64
, unsigned long, fd
, struct stat64 __user
*, statbuf
)
548 int error
= vfs_fstat(fd
, &stat
);
551 error
= cp_new_stat64(&stat
, statbuf
);
556 SYSCALL_DEFINE4(fstatat64
, int, dfd
, const char __user
*, filename
,
557 struct stat64 __user
*, statbuf
, int, flag
)
562 error
= vfs_fstatat(dfd
, filename
, &stat
, flag
);
565 return cp_new_stat64(&stat
, statbuf
);
567 #endif /* __ARCH_WANT_STAT64 || __ARCH_WANT_COMPAT_STAT64 */
569 static noinline_for_stack
int
570 cp_statx(const struct kstat
*stat
, struct statx __user
*buffer
)
574 memset(&tmp
, 0, sizeof(tmp
));
576 tmp
.stx_mask
= stat
->result_mask
;
577 tmp
.stx_blksize
= stat
->blksize
;
578 tmp
.stx_attributes
= stat
->attributes
;
579 tmp
.stx_nlink
= stat
->nlink
;
580 tmp
.stx_uid
= from_kuid_munged(current_user_ns(), stat
->uid
);
581 tmp
.stx_gid
= from_kgid_munged(current_user_ns(), stat
->gid
);
582 tmp
.stx_mode
= stat
->mode
;
583 tmp
.stx_ino
= stat
->ino
;
584 tmp
.stx_size
= stat
->size
;
585 tmp
.stx_blocks
= stat
->blocks
;
586 tmp
.stx_attributes_mask
= stat
->attributes_mask
;
587 tmp
.stx_atime
.tv_sec
= stat
->atime
.tv_sec
;
588 tmp
.stx_atime
.tv_nsec
= stat
->atime
.tv_nsec
;
589 tmp
.stx_btime
.tv_sec
= stat
->btime
.tv_sec
;
590 tmp
.stx_btime
.tv_nsec
= stat
->btime
.tv_nsec
;
591 tmp
.stx_ctime
.tv_sec
= stat
->ctime
.tv_sec
;
592 tmp
.stx_ctime
.tv_nsec
= stat
->ctime
.tv_nsec
;
593 tmp
.stx_mtime
.tv_sec
= stat
->mtime
.tv_sec
;
594 tmp
.stx_mtime
.tv_nsec
= stat
->mtime
.tv_nsec
;
595 tmp
.stx_rdev_major
= MAJOR(stat
->rdev
);
596 tmp
.stx_rdev_minor
= MINOR(stat
->rdev
);
597 tmp
.stx_dev_major
= MAJOR(stat
->dev
);
598 tmp
.stx_dev_minor
= MINOR(stat
->dev
);
599 tmp
.stx_mnt_id
= stat
->mnt_id
;
601 return copy_to_user(buffer
, &tmp
, sizeof(tmp
)) ? -EFAULT
: 0;
604 int do_statx(int dfd
, const char __user
*filename
, unsigned flags
,
605 unsigned int mask
, struct statx __user
*buffer
)
610 if (mask
& STATX__RESERVED
)
612 if ((flags
& AT_STATX_SYNC_TYPE
) == AT_STATX_SYNC_TYPE
)
615 error
= vfs_statx(dfd
, filename
, flags
, &stat
, mask
);
619 return cp_statx(&stat
, buffer
);
623 * sys_statx - System call to get enhanced stats
624 * @dfd: Base directory to pathwalk from *or* fd to stat.
625 * @filename: File to stat or "" with AT_EMPTY_PATH
626 * @flags: AT_* flags to control pathwalk.
627 * @mask: Parts of statx struct actually required.
628 * @buffer: Result buffer.
630 * Note that fstat() can be emulated by setting dfd to the fd of interest,
631 * supplying "" as the filename and setting AT_EMPTY_PATH in the flags.
633 SYSCALL_DEFINE5(statx
,
634 int, dfd
, const char __user
*, filename
, unsigned, flags
,
636 struct statx __user
*, buffer
)
638 return do_statx(dfd
, filename
, flags
, mask
, buffer
);
642 static int cp_compat_stat(struct kstat
*stat
, struct compat_stat __user
*ubuf
)
644 struct compat_stat tmp
;
646 if (sizeof(tmp
.st_dev
) < 4 && !old_valid_dev(stat
->dev
))
648 if (sizeof(tmp
.st_rdev
) < 4 && !old_valid_dev(stat
->rdev
))
651 memset(&tmp
, 0, sizeof(tmp
));
652 tmp
.st_dev
= new_encode_dev(stat
->dev
);
653 tmp
.st_ino
= stat
->ino
;
654 if (sizeof(tmp
.st_ino
) < sizeof(stat
->ino
) && tmp
.st_ino
!= stat
->ino
)
656 tmp
.st_mode
= stat
->mode
;
657 tmp
.st_nlink
= stat
->nlink
;
658 if (tmp
.st_nlink
!= stat
->nlink
)
660 SET_UID(tmp
.st_uid
, from_kuid_munged(current_user_ns(), stat
->uid
));
661 SET_GID(tmp
.st_gid
, from_kgid_munged(current_user_ns(), stat
->gid
));
662 tmp
.st_rdev
= new_encode_dev(stat
->rdev
);
663 if ((u64
) stat
->size
> MAX_NON_LFS
)
665 tmp
.st_size
= stat
->size
;
666 tmp
.st_atime
= stat
->atime
.tv_sec
;
667 tmp
.st_atime_nsec
= stat
->atime
.tv_nsec
;
668 tmp
.st_mtime
= stat
->mtime
.tv_sec
;
669 tmp
.st_mtime_nsec
= stat
->mtime
.tv_nsec
;
670 tmp
.st_ctime
= stat
->ctime
.tv_sec
;
671 tmp
.st_ctime_nsec
= stat
->ctime
.tv_nsec
;
672 tmp
.st_blocks
= stat
->blocks
;
673 tmp
.st_blksize
= stat
->blksize
;
674 return copy_to_user(ubuf
, &tmp
, sizeof(tmp
)) ? -EFAULT
: 0;
677 COMPAT_SYSCALL_DEFINE2(newstat
, const char __user
*, filename
,
678 struct compat_stat __user
*, statbuf
)
683 error
= vfs_stat(filename
, &stat
);
686 return cp_compat_stat(&stat
, statbuf
);
689 COMPAT_SYSCALL_DEFINE2(newlstat
, const char __user
*, filename
,
690 struct compat_stat __user
*, statbuf
)
695 error
= vfs_lstat(filename
, &stat
);
698 return cp_compat_stat(&stat
, statbuf
);
701 #ifndef __ARCH_WANT_STAT64
702 COMPAT_SYSCALL_DEFINE4(newfstatat
, unsigned int, dfd
,
703 const char __user
*, filename
,
704 struct compat_stat __user
*, statbuf
, int, flag
)
709 error
= vfs_fstatat(dfd
, filename
, &stat
, flag
);
712 return cp_compat_stat(&stat
, statbuf
);
716 COMPAT_SYSCALL_DEFINE2(newfstat
, unsigned int, fd
,
717 struct compat_stat __user
*, statbuf
)
720 int error
= vfs_fstat(fd
, &stat
);
723 error
= cp_compat_stat(&stat
, statbuf
);
728 /* Caller is here responsible for sufficient locking (ie. inode->i_lock) */
729 void __inode_add_bytes(struct inode
*inode
, loff_t bytes
)
731 inode
->i_blocks
+= bytes
>> 9;
733 inode
->i_bytes
+= bytes
;
734 if (inode
->i_bytes
>= 512) {
736 inode
->i_bytes
-= 512;
739 EXPORT_SYMBOL(__inode_add_bytes
);
741 void inode_add_bytes(struct inode
*inode
, loff_t bytes
)
743 spin_lock(&inode
->i_lock
);
744 __inode_add_bytes(inode
, bytes
);
745 spin_unlock(&inode
->i_lock
);
748 EXPORT_SYMBOL(inode_add_bytes
);
750 void __inode_sub_bytes(struct inode
*inode
, loff_t bytes
)
752 inode
->i_blocks
-= bytes
>> 9;
754 if (inode
->i_bytes
< bytes
) {
756 inode
->i_bytes
+= 512;
758 inode
->i_bytes
-= bytes
;
761 EXPORT_SYMBOL(__inode_sub_bytes
);
763 void inode_sub_bytes(struct inode
*inode
, loff_t bytes
)
765 spin_lock(&inode
->i_lock
);
766 __inode_sub_bytes(inode
, bytes
);
767 spin_unlock(&inode
->i_lock
);
770 EXPORT_SYMBOL(inode_sub_bytes
);
772 loff_t
inode_get_bytes(struct inode
*inode
)
776 spin_lock(&inode
->i_lock
);
777 ret
= __inode_get_bytes(inode
);
778 spin_unlock(&inode
->i_lock
);
782 EXPORT_SYMBOL(inode_get_bytes
);
784 void inode_set_bytes(struct inode
*inode
, loff_t bytes
)
786 /* Caller is here responsible for sufficient locking
787 * (ie. inode->i_lock) */
788 inode
->i_blocks
= bytes
>> 9;
789 inode
->i_bytes
= bytes
& 511;
792 EXPORT_SYMBOL(inode_set_bytes
);