Blame view
fs/stat.c
19.6 KB
b24413180 License cleanup: ... |
1 |
// SPDX-License-Identifier: GPL-2.0 |
1da177e4c Linux-2.6.12-rc2 |
2 3 4 5 6 |
/* * linux/fs/stat.c * * Copyright (C) 1991, 1992 Linus Torvalds */ |
630d9c472 fs: reduce the us... |
7 |
#include <linux/export.h> |
1da177e4c Linux-2.6.12-rc2 |
8 9 10 |
#include <linux/mm.h> #include <linux/errno.h> #include <linux/file.h> |
1da177e4c Linux-2.6.12-rc2 |
11 12 13 14 |
#include <linux/highuid.h> #include <linux/fs.h> #include <linux/namei.h> #include <linux/security.h> |
5b825c3af sched/headers: Pr... |
15 |
#include <linux/cred.h> |
1da177e4c Linux-2.6.12-rc2 |
16 |
#include <linux/syscalls.h> |
ba52de123 [PATCH] inode-die... |
17 |
#include <linux/pagemap.h> |
ac565de31 stat: move compat... |
18 |
#include <linux/compat.h> |
1da177e4c Linux-2.6.12-rc2 |
19 |
|
7c0f6ba68 Replace <asm/uacc... |
20 |
#include <linux/uaccess.h> |
1da177e4c Linux-2.6.12-rc2 |
21 |
#include <asm/unistd.h> |
3934e36f6 fs: make two stat... |
22 |
#include "internal.h" |
a528d35e8 statx: Add a syst... |
23 24 25 26 27 28 29 30 31 |
/** * generic_fillattr - Fill in the basic attributes from the inode struct * @inode: Inode to use as the source * @stat: Where to fill in the attributes * * Fill in the basic attributes in the kstat structure from data that's to be * found on the VFS inode structure. This is the default if no getattr inode * operation is supplied. */ |
1da177e4c Linux-2.6.12-rc2 |
32 33 34 35 36 37 38 39 40 |
void generic_fillattr(struct inode *inode, struct kstat *stat) { stat->dev = inode->i_sb->s_dev; stat->ino = inode->i_ino; stat->mode = inode->i_mode; stat->nlink = inode->i_nlink; stat->uid = inode->i_uid; stat->gid = inode->i_gid; stat->rdev = inode->i_rdev; |
3ddcd0569 vfs: optimize ino... |
41 |
stat->size = i_size_read(inode); |
1da177e4c Linux-2.6.12-rc2 |
42 43 44 |
stat->atime = inode->i_atime; stat->mtime = inode->i_mtime; stat->ctime = inode->i_ctime; |
93407472a fs: add i_blocksi... |
45 |
stat->blksize = i_blocksize(inode); |
3ddcd0569 vfs: optimize ino... |
46 |
stat->blocks = inode->i_blocks; |
a528d35e8 statx: Add a syst... |
47 |
} |
1da177e4c Linux-2.6.12-rc2 |
48 |
EXPORT_SYMBOL(generic_fillattr); |
b7a6ec52d vfs: split out vf... |
49 50 51 52 |
/** * vfs_getattr_nosec - getattr without security checks * @path: file to get attributes from * @stat: structure to return attributes in |
a528d35e8 statx: Add a syst... |
53 54 |
* @request_mask: STATX_xxx flags indicating what the caller wants * @query_flags: Query mode (KSTAT_QUERY_FLAGS) |
b7a6ec52d vfs: split out vf... |
55 56 57 58 |
* * Get attributes without calling security_inode_getattr. * * Currently the only caller other than vfs_getattr is internal to the |
a528d35e8 statx: Add a syst... |
59 60 |
* filehandle lookup code, which uses only the inode number and returns no * attributes to any user. Any other code probably wants vfs_getattr. |
b7a6ec52d vfs: split out vf... |
61 |
*/ |
a528d35e8 statx: Add a syst... |
62 63 |
int vfs_getattr_nosec(const struct path *path, struct kstat *stat, u32 request_mask, unsigned int query_flags) |
1da177e4c Linux-2.6.12-rc2 |
64 |
{ |
bb668734c VFS: assorted d_b... |
65 |
struct inode *inode = d_backing_inode(path->dentry); |
1da177e4c Linux-2.6.12-rc2 |
66 |
|
a528d35e8 statx: Add a syst... |
67 68 69 70 |
memset(stat, 0, sizeof(*stat)); stat->result_mask |= STATX_BASIC_STATS; request_mask &= STATX_ALL; query_flags &= KSTAT_QUERY_FLAGS; |
801e52379 fs: move generic ... |
71 72 73 74 75 76 |
/* allow the fs to override these if it really wants to */ if (IS_NOATIME(inode)) stat->result_mask &= ~STATX_ATIME; if (IS_AUTOMOUNT(inode)) stat->attributes |= STATX_ATTR_AUTOMOUNT; |
1da177e4c Linux-2.6.12-rc2 |
77 |
if (inode->i_op->getattr) |
a528d35e8 statx: Add a syst... |
78 79 |
return inode->i_op->getattr(path, stat, request_mask, query_flags); |
1da177e4c Linux-2.6.12-rc2 |
80 81 |
generic_fillattr(inode, stat); |
1da177e4c Linux-2.6.12-rc2 |
82 83 |
return 0; } |
b7a6ec52d vfs: split out vf... |
84 |
EXPORT_SYMBOL(vfs_getattr_nosec); |
a528d35e8 statx: Add a syst... |
85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 |
/* * vfs_getattr - Get the enhanced basic attributes of a file * @path: The file of interest * @stat: Where to return the statistics * @request_mask: STATX_xxx flags indicating what the caller wants * @query_flags: Query mode (KSTAT_QUERY_FLAGS) * * Ask the filesystem for a file's attributes. The caller must indicate in * request_mask and query_flags to indicate what they want. * * If the file is remote, the filesystem can be forced to update the attributes * from the backing store by passing AT_STATX_FORCE_SYNC in query_flags or can * suppress the update by passing AT_STATX_DONT_SYNC. * * Bits must have been set in request_mask to indicate which attributes the * caller wants retrieving. Any such attribute not requested may be returned * anyway, but the value may be approximate, and, if remote, may not have been * synchronised with the server. * * 0 will be returned on success, and a -ve error code if unsuccessful. */ int vfs_getattr(const struct path *path, struct kstat *stat, u32 request_mask, unsigned int query_flags) |
b7a6ec52d vfs: split out vf... |
108 109 |
{ int retval; |
3f7036a07 switch security_i... |
110 |
retval = security_inode_getattr(path); |
b7a6ec52d vfs: split out vf... |
111 112 |
if (retval) return retval; |
a528d35e8 statx: Add a syst... |
113 |
return vfs_getattr_nosec(path, stat, request_mask, query_flags); |
b7a6ec52d vfs: split out vf... |
114 |
} |
1da177e4c Linux-2.6.12-rc2 |
115 |
EXPORT_SYMBOL(vfs_getattr); |
a528d35e8 statx: Add a syst... |
116 117 118 119 120 121 122 123 124 125 126 127 128 129 |
/** * vfs_statx_fd - Get the enhanced basic attributes by file descriptor * @fd: The file descriptor referring to the file of interest * @stat: The result structure to fill in. * @request_mask: STATX_xxx flags indicating what the caller wants * @query_flags: Query mode (KSTAT_QUERY_FLAGS) * * This function is a wrapper around vfs_getattr(). The main difference is * that it uses a file descriptor to determine the file location. * * 0 will be returned on success, and a -ve error code if unsuccessful. */ int vfs_statx_fd(unsigned int fd, struct kstat *stat, u32 request_mask, unsigned int query_flags) |
1da177e4c Linux-2.6.12-rc2 |
130 |
{ |
8c7493aa3 statx: reject unk... |
131 |
struct fd f; |
1da177e4c Linux-2.6.12-rc2 |
132 |
int error = -EBADF; |
8c7493aa3 statx: reject unk... |
133 134 135 136 |
if (query_flags & ~KSTAT_QUERY_FLAGS) return -EINVAL; f = fdget_raw(fd); |
2903ff019 switch simple cas... |
137 |
if (f.file) { |
a528d35e8 statx: Add a syst... |
138 139 |
error = vfs_getattr(&f.file->f_path, stat, request_mask, query_flags); |
2903ff019 switch simple cas... |
140 |
fdput(f); |
1da177e4c Linux-2.6.12-rc2 |
141 142 143 |
} return error; } |
a528d35e8 statx: Add a syst... |
144 |
EXPORT_SYMBOL(vfs_statx_fd); |
1da177e4c Linux-2.6.12-rc2 |
145 |
|
3934e36f6 fs: make two stat... |
146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 |
inline unsigned vfs_stat_set_lookup_flags(unsigned *lookup_flags, int flags) { if ((flags & ~(AT_SYMLINK_NOFOLLOW | AT_NO_AUTOMOUNT | AT_EMPTY_PATH | KSTAT_QUERY_FLAGS)) != 0) return -EINVAL; *lookup_flags = LOOKUP_FOLLOW | LOOKUP_AUTOMOUNT; if (flags & AT_SYMLINK_NOFOLLOW) *lookup_flags &= ~LOOKUP_FOLLOW; if (flags & AT_NO_AUTOMOUNT) *lookup_flags &= ~LOOKUP_AUTOMOUNT; if (flags & AT_EMPTY_PATH) *lookup_flags |= LOOKUP_EMPTY; return 0; } |
a528d35e8 statx: Add a syst... |
162 163 164 165 166 167 168 169 170 171 172 173 174 |
/** * vfs_statx - Get basic and extra attributes by filename * @dfd: A file descriptor representing the base dir for a relative filename * @filename: The name of the file of interest * @flags: Flags to control the query * @stat: The result structure to fill in. * @request_mask: STATX_xxx flags indicating what the caller wants * * This function is a wrapper around vfs_getattr(). The main difference is * that it uses a filename and base directory to determine the file location. * Additionally, the use of AT_SYMLINK_NOFOLLOW in flags will prevent a symlink * at the given name from being referenced. * |
a528d35e8 statx: Add a syst... |
175 176 177 178 |
* 0 will be returned on success, and a -ve error code if unsuccessful. */ int vfs_statx(int dfd, const char __user *filename, int flags, struct kstat *stat, u32 request_mask) |
0112fc222 Separate out comm... |
179 |
{ |
2eae7a187 kill vfs_stat_fd ... |
180 |
struct path path; |
0112fc222 Separate out comm... |
181 |
int error = -EINVAL; |
3934e36f6 fs: make two stat... |
182 |
unsigned lookup_flags; |
0112fc222 Separate out comm... |
183 |
|
3934e36f6 fs: make two stat... |
184 |
if (vfs_stat_set_lookup_flags(&lookup_flags, flags)) |
a528d35e8 statx: Add a syst... |
185 |
return -EINVAL; |
836fb7e7b vfs: make fstatat... |
186 |
retry: |
2eae7a187 kill vfs_stat_fd ... |
187 188 189 |
error = user_path_at(dfd, filename, lookup_flags, &path); if (error) goto out; |
a528d35e8 statx: Add a syst... |
190 |
error = vfs_getattr(&path, stat, request_mask, flags); |
2eae7a187 kill vfs_stat_fd ... |
191 |
path_put(&path); |
836fb7e7b vfs: make fstatat... |
192 193 194 195 |
if (retry_estale(error, lookup_flags)) { lookup_flags |= LOOKUP_REVAL; goto retry; } |
0112fc222 Separate out comm... |
196 197 198 |
out: return error; } |
a528d35e8 statx: Add a syst... |
199 |
EXPORT_SYMBOL(vfs_statx); |
2eae7a187 kill vfs_stat_fd ... |
200 |
|
0112fc222 Separate out comm... |
201 |
|
1da177e4c Linux-2.6.12-rc2 |
202 203 204 205 206 207 208 209 210 211 |
#ifdef __ARCH_WANT_OLD_STAT /* * For backward compatibility? Maybe this should be moved * into arch/i386 instead? */ static int cp_old_stat(struct kstat *stat, struct __old_kernel_stat __user * statbuf) { static int warncount = 5; struct __old_kernel_stat tmp; |
a528d35e8 statx: Add a syst... |
212 |
|
1da177e4c Linux-2.6.12-rc2 |
213 214 215 216 217 218 219 220 221 222 223 224 225 |
if (warncount > 0) { warncount--; printk(KERN_WARNING "VFS: Warning: %s using old stat() call. Recompile your binary. ", current->comm); } else if (warncount < 0) { /* it's laughable, but... */ warncount = 0; } memset(&tmp, 0, sizeof(struct __old_kernel_stat)); tmp.st_dev = old_encode_dev(stat->dev); tmp.st_ino = stat->ino; |
afefdbb28 [PATCH] VFS: Make... |
226 227 |
if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino) return -EOVERFLOW; |
1da177e4c Linux-2.6.12-rc2 |
228 229 230 231 |
tmp.st_mode = stat->mode; tmp.st_nlink = stat->nlink; if (tmp.st_nlink != stat->nlink) return -EOVERFLOW; |
a7c1938e2 userns: Convert s... |
232 233 |
SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid)); SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid)); |
1da177e4c Linux-2.6.12-rc2 |
234 235 236 237 |
tmp.st_rdev = old_encode_dev(stat->rdev); #if BITS_PER_LONG == 32 if (stat->size > MAX_NON_LFS) return -EOVERFLOW; |
a528d35e8 statx: Add a syst... |
238 |
#endif |
1da177e4c Linux-2.6.12-rc2 |
239 240 241 242 243 244 |
tmp.st_size = stat->size; tmp.st_atime = stat->atime.tv_sec; tmp.st_mtime = stat->mtime.tv_sec; tmp.st_ctime = stat->ctime.tv_sec; return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0; } |
c78873252 Mark arguments to... |
245 246 |
SYSCALL_DEFINE2(stat, const char __user *, filename, struct __old_kernel_stat __user *, statbuf) |
1da177e4c Linux-2.6.12-rc2 |
247 248 |
{ struct kstat stat; |
2eae7a187 kill vfs_stat_fd ... |
249 |
int error; |
1da177e4c Linux-2.6.12-rc2 |
250 |
|
2eae7a187 kill vfs_stat_fd ... |
251 252 253 |
error = vfs_stat(filename, &stat); if (error) return error; |
1da177e4c Linux-2.6.12-rc2 |
254 |
|
2eae7a187 kill vfs_stat_fd ... |
255 |
return cp_old_stat(&stat, statbuf); |
1da177e4c Linux-2.6.12-rc2 |
256 |
} |
257ac264d [CVE-2009-0029] S... |
257 |
|
c78873252 Mark arguments to... |
258 259 |
SYSCALL_DEFINE2(lstat, const char __user *, filename, struct __old_kernel_stat __user *, statbuf) |
1da177e4c Linux-2.6.12-rc2 |
260 261 |
{ struct kstat stat; |
2eae7a187 kill vfs_stat_fd ... |
262 |
int error; |
1da177e4c Linux-2.6.12-rc2 |
263 |
|
2eae7a187 kill vfs_stat_fd ... |
264 265 266 |
error = vfs_lstat(filename, &stat); if (error) return error; |
1da177e4c Linux-2.6.12-rc2 |
267 |
|
2eae7a187 kill vfs_stat_fd ... |
268 |
return cp_old_stat(&stat, statbuf); |
1da177e4c Linux-2.6.12-rc2 |
269 |
} |
257ac264d [CVE-2009-0029] S... |
270 271 |
SYSCALL_DEFINE2(fstat, unsigned int, fd, struct __old_kernel_stat __user *, statbuf) |
1da177e4c Linux-2.6.12-rc2 |
272 273 274 275 276 277 278 279 280 281 282 |
{ struct kstat stat; int error = vfs_fstat(fd, &stat); if (!error) error = cp_old_stat(&stat, statbuf); return error; } #endif /* __ARCH_WANT_OLD_STAT */ |
82b355d16 y2038: Remove new... |
283 |
#ifdef __ARCH_WANT_NEW_STAT |
a52dd971f vfs: de-crapify "... |
284 285 286 287 288 |
#if BITS_PER_LONG == 32 # define choose_32_64(a,b) a #else # define choose_32_64(a,b) b #endif |
4c416f42e fs/stat.c: drop t... |
289 |
#define valid_dev(x) choose_32_64(old_valid_dev(x),true) |
a52dd971f vfs: de-crapify "... |
290 |
#define encode_dev(x) choose_32_64(old_encode_dev,new_encode_dev)(x) |
8529f613b vfs: don't force ... |
291 292 293 |
#ifndef INIT_STRUCT_STAT_PADDING # define INIT_STRUCT_STAT_PADDING(st) memset(&st, 0, sizeof(st)) #endif |
1da177e4c Linux-2.6.12-rc2 |
294 295 296 |
static int cp_new_stat(struct kstat *stat, struct stat __user *statbuf) { struct stat tmp; |
a52dd971f vfs: de-crapify "... |
297 |
if (!valid_dev(stat->dev) || !valid_dev(stat->rdev)) |
1da177e4c Linux-2.6.12-rc2 |
298 |
return -EOVERFLOW; |
a52dd971f vfs: de-crapify "... |
299 300 |
#if BITS_PER_LONG == 32 if (stat->size > MAX_NON_LFS) |
1da177e4c Linux-2.6.12-rc2 |
301 302 |
return -EOVERFLOW; #endif |
8529f613b vfs: don't force ... |
303 |
INIT_STRUCT_STAT_PADDING(tmp); |
a52dd971f vfs: de-crapify "... |
304 |
tmp.st_dev = encode_dev(stat->dev); |
1da177e4c Linux-2.6.12-rc2 |
305 |
tmp.st_ino = stat->ino; |
afefdbb28 [PATCH] VFS: Make... |
306 307 |
if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino) return -EOVERFLOW; |
1da177e4c Linux-2.6.12-rc2 |
308 309 310 311 |
tmp.st_mode = stat->mode; tmp.st_nlink = stat->nlink; if (tmp.st_nlink != stat->nlink) return -EOVERFLOW; |
a7c1938e2 userns: Convert s... |
312 313 |
SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid)); SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid)); |
a52dd971f vfs: de-crapify "... |
314 |
tmp.st_rdev = encode_dev(stat->rdev); |
1da177e4c Linux-2.6.12-rc2 |
315 316 317 318 319 320 321 322 323 324 325 326 327 |
tmp.st_size = stat->size; tmp.st_atime = stat->atime.tv_sec; tmp.st_mtime = stat->mtime.tv_sec; tmp.st_ctime = stat->ctime.tv_sec; #ifdef STAT_HAVE_NSEC tmp.st_atime_nsec = stat->atime.tv_nsec; tmp.st_mtime_nsec = stat->mtime.tv_nsec; tmp.st_ctime_nsec = stat->ctime.tv_nsec; #endif tmp.st_blocks = stat->blocks; tmp.st_blksize = stat->blksize; return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0; } |
c78873252 Mark arguments to... |
328 329 |
SYSCALL_DEFINE2(newstat, const char __user *, filename, struct stat __user *, statbuf) |
5590ff0d5 [PATCH] vfs: *at ... |
330 331 |
{ struct kstat stat; |
2eae7a187 kill vfs_stat_fd ... |
332 |
int error = vfs_stat(filename, &stat); |
5590ff0d5 [PATCH] vfs: *at ... |
333 |
|
2eae7a187 kill vfs_stat_fd ... |
334 335 336 |
if (error) return error; return cp_new_stat(&stat, statbuf); |
5590ff0d5 [PATCH] vfs: *at ... |
337 |
} |
c78873252 Mark arguments to... |
338 339 |
SYSCALL_DEFINE2(newlstat, const char __user *, filename, struct stat __user *, statbuf) |
1da177e4c Linux-2.6.12-rc2 |
340 341 |
{ struct kstat stat; |
2eae7a187 kill vfs_stat_fd ... |
342 |
int error; |
1da177e4c Linux-2.6.12-rc2 |
343 |
|
2eae7a187 kill vfs_stat_fd ... |
344 345 346 |
error = vfs_lstat(filename, &stat); if (error) return error; |
1da177e4c Linux-2.6.12-rc2 |
347 |
|
2eae7a187 kill vfs_stat_fd ... |
348 |
return cp_new_stat(&stat, statbuf); |
1da177e4c Linux-2.6.12-rc2 |
349 |
} |
5590ff0d5 [PATCH] vfs: *at ... |
350 |
|
2833c28aa [PATCH] powerpc: ... |
351 |
#if !defined(__ARCH_WANT_STAT64) || defined(__ARCH_WANT_SYS_NEWFSTATAT) |
c78873252 Mark arguments to... |
352 |
SYSCALL_DEFINE4(newfstatat, int, dfd, const char __user *, filename, |
6559eed8c [CVE-2009-0029] S... |
353 |
struct stat __user *, statbuf, int, flag) |
1da177e4c Linux-2.6.12-rc2 |
354 355 |
{ struct kstat stat; |
0112fc222 Separate out comm... |
356 |
int error; |
1da177e4c Linux-2.6.12-rc2 |
357 |
|
0112fc222 Separate out comm... |
358 359 360 361 |
error = vfs_fstatat(dfd, filename, &stat, flag); if (error) return error; return cp_new_stat(&stat, statbuf); |
1da177e4c Linux-2.6.12-rc2 |
362 |
} |
cff2b7600 [PATCH] fstatat64... |
363 |
#endif |
5590ff0d5 [PATCH] vfs: *at ... |
364 |
|
257ac264d [CVE-2009-0029] S... |
365 |
SYSCALL_DEFINE2(newfstat, unsigned int, fd, struct stat __user *, statbuf) |
1da177e4c Linux-2.6.12-rc2 |
366 367 368 369 370 371 372 373 374 |
{ struct kstat stat; int error = vfs_fstat(fd, &stat); if (!error) error = cp_new_stat(&stat, statbuf); return error; } |
82b355d16 y2038: Remove new... |
375 |
#endif |
1da177e4c Linux-2.6.12-rc2 |
376 |
|
2dae02480 fs: add do_readli... |
377 378 |
static int do_readlinkat(int dfd, const char __user *pathname, char __user *buf, int bufsiz) |
1da177e4c Linux-2.6.12-rc2 |
379 |
{ |
2d8f30380 [PATCH] sanitize ... |
380 |
struct path path; |
1da177e4c Linux-2.6.12-rc2 |
381 |
int error; |
1fa1e7f61 readlinkat: ensur... |
382 |
int empty = 0; |
7955119e0 vfs: fix readlink... |
383 |
unsigned int lookup_flags = LOOKUP_EMPTY; |
1da177e4c Linux-2.6.12-rc2 |
384 385 386 |
if (bufsiz <= 0) return -EINVAL; |
7955119e0 vfs: fix readlink... |
387 388 |
retry: error = user_path_at_empty(dfd, pathname, lookup_flags, &path, &empty); |
1da177e4c Linux-2.6.12-rc2 |
389 |
if (!error) { |
bb668734c VFS: assorted d_b... |
390 |
struct inode *inode = d_backing_inode(path.dentry); |
1da177e4c Linux-2.6.12-rc2 |
391 |
|
1fa1e7f61 readlinkat: ensur... |
392 |
error = empty ? -ENOENT : -EINVAL; |
fd4a0edf2 vfs: replace call... |
393 394 395 396 |
/* * AFS mountpoints allow readlink(2) but are not symlinks */ if (d_is_symlink(path.dentry) || inode->i_op->readlink) { |
2d8f30380 [PATCH] sanitize ... |
397 |
error = security_inode_readlink(path.dentry); |
1da177e4c Linux-2.6.12-rc2 |
398 |
if (!error) { |
68ac1234f switch touch_atim... |
399 |
touch_atime(&path); |
fd4a0edf2 vfs: replace call... |
400 |
error = vfs_readlink(path.dentry, buf, bufsiz); |
1da177e4c Linux-2.6.12-rc2 |
401 402 |
} } |
2d8f30380 [PATCH] sanitize ... |
403 |
path_put(&path); |
7955119e0 vfs: fix readlink... |
404 405 406 407 |
if (retry_estale(error, lookup_flags)) { lookup_flags |= LOOKUP_REVAL; goto retry; } |
1da177e4c Linux-2.6.12-rc2 |
408 409 410 |
} return error; } |
2dae02480 fs: add do_readli... |
411 412 413 414 415 |
SYSCALL_DEFINE4(readlinkat, int, dfd, const char __user *, pathname, char __user *, buf, int, bufsiz) { return do_readlinkat(dfd, pathname, buf, bufsiz); } |
002c8976e [CVE-2009-0029] S... |
416 417 |
SYSCALL_DEFINE3(readlink, const char __user *, path, char __user *, buf, int, bufsiz) |
5590ff0d5 [PATCH] vfs: *at ... |
418 |
{ |
2dae02480 fs: add do_readli... |
419 |
return do_readlinkat(AT_FDCWD, path, buf, bufsiz); |
5590ff0d5 [PATCH] vfs: *at ... |
420 |
} |
1da177e4c Linux-2.6.12-rc2 |
421 422 |
/* ---------- LFS-64 ----------- */ |
0753f70f0 fs: Build sys_sta... |
423 |
#if defined(__ARCH_WANT_STAT64) || defined(__ARCH_WANT_COMPAT_STAT64) |
1da177e4c Linux-2.6.12-rc2 |
424 |
|
8529f613b vfs: don't force ... |
425 426 427 |
#ifndef INIT_STRUCT_STAT64_PADDING # define INIT_STRUCT_STAT64_PADDING(st) memset(&st, 0, sizeof(st)) #endif |
1da177e4c Linux-2.6.12-rc2 |
428 429 430 |
static long cp_new_stat64(struct kstat *stat, struct stat64 __user *statbuf) { struct stat64 tmp; |
8529f613b vfs: don't force ... |
431 |
INIT_STRUCT_STAT64_PADDING(tmp); |
1da177e4c Linux-2.6.12-rc2 |
432 433 |
#ifdef CONFIG_MIPS /* mips has weird padding, so we don't get 64 bits there */ |
1da177e4c Linux-2.6.12-rc2 |
434 435 436 437 438 439 440 |
tmp.st_dev = new_encode_dev(stat->dev); tmp.st_rdev = new_encode_dev(stat->rdev); #else tmp.st_dev = huge_encode_dev(stat->dev); tmp.st_rdev = huge_encode_dev(stat->rdev); #endif tmp.st_ino = stat->ino; |
afefdbb28 [PATCH] VFS: Make... |
441 442 |
if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino) return -EOVERFLOW; |
1da177e4c Linux-2.6.12-rc2 |
443 444 445 446 447 |
#ifdef STAT64_HAS_BROKEN_ST_INO tmp.__st_ino = stat->ino; #endif tmp.st_mode = stat->mode; tmp.st_nlink = stat->nlink; |
a7c1938e2 userns: Convert s... |
448 449 |
tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid); tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid); |
1da177e4c Linux-2.6.12-rc2 |
450 451 452 453 454 455 456 457 458 459 460 |
tmp.st_atime = stat->atime.tv_sec; tmp.st_atime_nsec = stat->atime.tv_nsec; tmp.st_mtime = stat->mtime.tv_sec; tmp.st_mtime_nsec = stat->mtime.tv_nsec; tmp.st_ctime = stat->ctime.tv_sec; tmp.st_ctime_nsec = stat->ctime.tv_nsec; tmp.st_size = stat->size; tmp.st_blocks = stat->blocks; tmp.st_blksize = stat->blksize; return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0; } |
c78873252 Mark arguments to... |
461 462 |
SYSCALL_DEFINE2(stat64, const char __user *, filename, struct stat64 __user *, statbuf) |
1da177e4c Linux-2.6.12-rc2 |
463 464 465 466 467 468 469 470 471 |
{ struct kstat stat; int error = vfs_stat(filename, &stat); if (!error) error = cp_new_stat64(&stat, statbuf); return error; } |
257ac264d [CVE-2009-0029] S... |
472 |
|
c78873252 Mark arguments to... |
473 474 |
SYSCALL_DEFINE2(lstat64, const char __user *, filename, struct stat64 __user *, statbuf) |
1da177e4c Linux-2.6.12-rc2 |
475 476 477 478 479 480 481 482 483 |
{ struct kstat stat; int error = vfs_lstat(filename, &stat); if (!error) error = cp_new_stat64(&stat, statbuf); return error; } |
257ac264d [CVE-2009-0029] S... |
484 485 |
SYSCALL_DEFINE2(fstat64, unsigned long, fd, struct stat64 __user *, statbuf) |
1da177e4c Linux-2.6.12-rc2 |
486 487 488 489 490 491 492 493 494 |
{ struct kstat stat; int error = vfs_fstat(fd, &stat); if (!error) error = cp_new_stat64(&stat, statbuf); return error; } |
c78873252 Mark arguments to... |
495 |
SYSCALL_DEFINE4(fstatat64, int, dfd, const char __user *, filename, |
6559eed8c [CVE-2009-0029] S... |
496 |
struct stat64 __user *, statbuf, int, flag) |
cff2b7600 [PATCH] fstatat64... |
497 498 |
{ struct kstat stat; |
0112fc222 Separate out comm... |
499 |
int error; |
cff2b7600 [PATCH] fstatat64... |
500 |
|
0112fc222 Separate out comm... |
501 502 503 504 |
error = vfs_fstatat(dfd, filename, &stat, flag); if (error) return error; return cp_new_stat64(&stat, statbuf); |
cff2b7600 [PATCH] fstatat64... |
505 |
} |
0753f70f0 fs: Build sys_sta... |
506 |
#endif /* __ARCH_WANT_STAT64 || __ARCH_WANT_COMPAT_STAT64 */ |
1da177e4c Linux-2.6.12-rc2 |
507 |
|
3934e36f6 fs: make two stat... |
508 |
noinline_for_stack int |
64bd72048 statx: optimize c... |
509 |
cp_statx(const struct kstat *stat, struct statx __user *buffer) |
a528d35e8 statx: Add a syst... |
510 |
{ |
64bd72048 statx: optimize c... |
511 512 513 514 515 516 517 518 519 520 521 522 523 524 |
struct statx tmp; memset(&tmp, 0, sizeof(tmp)); tmp.stx_mask = stat->result_mask; tmp.stx_blksize = stat->blksize; tmp.stx_attributes = stat->attributes; tmp.stx_nlink = stat->nlink; tmp.stx_uid = from_kuid_munged(current_user_ns(), stat->uid); tmp.stx_gid = from_kgid_munged(current_user_ns(), stat->gid); tmp.stx_mode = stat->mode; tmp.stx_ino = stat->ino; tmp.stx_size = stat->size; tmp.stx_blocks = stat->blocks; |
3209f68b3 statx: Include a ... |
525 |
tmp.stx_attributes_mask = stat->attributes_mask; |
64bd72048 statx: optimize c... |
526 527 528 529 530 531 532 533 534 535 536 537 538 539 |
tmp.stx_atime.tv_sec = stat->atime.tv_sec; tmp.stx_atime.tv_nsec = stat->atime.tv_nsec; tmp.stx_btime.tv_sec = stat->btime.tv_sec; tmp.stx_btime.tv_nsec = stat->btime.tv_nsec; tmp.stx_ctime.tv_sec = stat->ctime.tv_sec; tmp.stx_ctime.tv_nsec = stat->ctime.tv_nsec; tmp.stx_mtime.tv_sec = stat->mtime.tv_sec; tmp.stx_mtime.tv_nsec = stat->mtime.tv_nsec; tmp.stx_rdev_major = MAJOR(stat->rdev); tmp.stx_rdev_minor = MINOR(stat->rdev); tmp.stx_dev_major = MAJOR(stat->dev); tmp.stx_dev_minor = MINOR(stat->dev); return copy_to_user(buffer, &tmp, sizeof(tmp)) ? -EFAULT : 0; |
a528d35e8 statx: Add a syst... |
540 541 542 543 544 |
} /** * sys_statx - System call to get enhanced stats * @dfd: Base directory to pathwalk from *or* fd to stat. |
1e2f82d1e statx: Kill fd-wi... |
545 |
* @filename: File to stat or "" with AT_EMPTY_PATH |
a528d35e8 statx: Add a syst... |
546 547 548 549 |
* @flags: AT_* flags to control pathwalk. * @mask: Parts of statx struct actually required. * @buffer: Result buffer. * |
1e2f82d1e statx: Kill fd-wi... |
550 551 |
* Note that fstat() can be emulated by setting dfd to the fd of interest, * supplying "" as the filename and setting AT_EMPTY_PATH in the flags. |
a528d35e8 statx: Add a syst... |
552 553 554 555 556 557 558 559 |
*/ SYSCALL_DEFINE5(statx, int, dfd, const char __user *, filename, unsigned, flags, unsigned int, mask, struct statx __user *, buffer) { struct kstat stat; int error; |
47071aee6 statx: Reserve th... |
560 561 |
if (mask & STATX__RESERVED) return -EINVAL; |
a528d35e8 statx: Add a syst... |
562 563 |
if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_SYNC_TYPE) return -EINVAL; |
a528d35e8 statx: Add a syst... |
564 |
|
1e2f82d1e statx: Kill fd-wi... |
565 |
error = vfs_statx(dfd, filename, flags, &stat, mask); |
a528d35e8 statx: Add a syst... |
566 567 |
if (error) return error; |
64bd72048 statx: optimize c... |
568 569 |
return cp_statx(&stat, buffer); |
a528d35e8 statx: Add a syst... |
570 |
} |
ac565de31 stat: move compat... |
571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 |
#ifdef CONFIG_COMPAT static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf) { struct compat_stat tmp; if (!old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev)) return -EOVERFLOW; memset(&tmp, 0, sizeof(tmp)); tmp.st_dev = old_encode_dev(stat->dev); tmp.st_ino = stat->ino; if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino) return -EOVERFLOW; tmp.st_mode = stat->mode; tmp.st_nlink = stat->nlink; if (tmp.st_nlink != stat->nlink) return -EOVERFLOW; SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid)); SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid)); tmp.st_rdev = old_encode_dev(stat->rdev); if ((u64) stat->size > MAX_NON_LFS) return -EOVERFLOW; tmp.st_size = stat->size; tmp.st_atime = stat->atime.tv_sec; tmp.st_atime_nsec = stat->atime.tv_nsec; tmp.st_mtime = stat->mtime.tv_sec; tmp.st_mtime_nsec = stat->mtime.tv_nsec; tmp.st_ctime = stat->ctime.tv_sec; tmp.st_ctime_nsec = stat->ctime.tv_nsec; tmp.st_blocks = stat->blocks; tmp.st_blksize = stat->blksize; return copy_to_user(ubuf, &tmp, sizeof(tmp)) ? -EFAULT : 0; } COMPAT_SYSCALL_DEFINE2(newstat, const char __user *, filename, struct compat_stat __user *, statbuf) { struct kstat stat; int error; error = vfs_stat(filename, &stat); if (error) return error; return cp_compat_stat(&stat, statbuf); } COMPAT_SYSCALL_DEFINE2(newlstat, const char __user *, filename, struct compat_stat __user *, statbuf) { struct kstat stat; int error; error = vfs_lstat(filename, &stat); if (error) return error; return cp_compat_stat(&stat, statbuf); } #ifndef __ARCH_WANT_STAT64 COMPAT_SYSCALL_DEFINE4(newfstatat, unsigned int, dfd, const char __user *, filename, struct compat_stat __user *, statbuf, int, flag) { struct kstat stat; int error; error = vfs_fstatat(dfd, filename, &stat, flag); if (error) return error; return cp_compat_stat(&stat, statbuf); } #endif COMPAT_SYSCALL_DEFINE2(newfstat, unsigned int, fd, struct compat_stat __user *, statbuf) { struct kstat stat; int error = vfs_fstat(fd, &stat); if (!error) error = cp_compat_stat(&stat, statbuf); return error; } #endif |
b462707e7 Add unlocked vers... |
655 656 |
/* Caller is here responsible for sufficient locking (ie. inode->i_lock) */ void __inode_add_bytes(struct inode *inode, loff_t bytes) |
1da177e4c Linux-2.6.12-rc2 |
657 |
{ |
1da177e4c Linux-2.6.12-rc2 |
658 659 660 661 662 663 664 |
inode->i_blocks += bytes >> 9; bytes &= 511; inode->i_bytes += bytes; if (inode->i_bytes >= 512) { inode->i_blocks++; inode->i_bytes -= 512; } |
b462707e7 Add unlocked vers... |
665 |
} |
eb315d2ae ufs: restore main... |
666 |
EXPORT_SYMBOL(__inode_add_bytes); |
b462707e7 Add unlocked vers... |
667 668 669 670 671 |
void inode_add_bytes(struct inode *inode, loff_t bytes) { spin_lock(&inode->i_lock); __inode_add_bytes(inode, bytes); |
1da177e4c Linux-2.6.12-rc2 |
672 673 674 675 |
spin_unlock(&inode->i_lock); } EXPORT_SYMBOL(inode_add_bytes); |
1c8924eb1 quota: provide in... |
676 |
void __inode_sub_bytes(struct inode *inode, loff_t bytes) |
1da177e4c Linux-2.6.12-rc2 |
677 |
{ |
1da177e4c Linux-2.6.12-rc2 |
678 679 680 681 682 683 684 |
inode->i_blocks -= bytes >> 9; bytes &= 511; if (inode->i_bytes < bytes) { inode->i_blocks--; inode->i_bytes += 512; } inode->i_bytes -= bytes; |
1c8924eb1 quota: provide in... |
685 686 687 688 689 690 691 692 |
} EXPORT_SYMBOL(__inode_sub_bytes); void inode_sub_bytes(struct inode *inode, loff_t bytes) { spin_lock(&inode->i_lock); __inode_sub_bytes(inode, bytes); |
1da177e4c Linux-2.6.12-rc2 |
693 694 695 696 697 698 699 700 701 702 |
spin_unlock(&inode->i_lock); } EXPORT_SYMBOL(inode_sub_bytes); loff_t inode_get_bytes(struct inode *inode) { loff_t ret; spin_lock(&inode->i_lock); |
f4a8116a4 fs: Provide __ino... |
703 |
ret = __inode_get_bytes(inode); |
1da177e4c Linux-2.6.12-rc2 |
704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 |
spin_unlock(&inode->i_lock); return ret; } EXPORT_SYMBOL(inode_get_bytes); void inode_set_bytes(struct inode *inode, loff_t bytes) { /* Caller is here responsible for sufficient locking * (ie. inode->i_lock) */ inode->i_blocks = bytes >> 9; inode->i_bytes = bytes & 511; } EXPORT_SYMBOL(inode_set_bytes); |