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1/*
2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
4 */
5
6#include <stdio.h>
7#include <stddef.h>
8#include <unistd.h>
9#include <dirent.h>
10#include <errno.h>
11#include <fcntl.h>
12#include <string.h>
13#include <sys/stat.h>
14#include <sys/time.h>
15#include <sys/types.h>
16#include <sys/vfs.h>
17#include <sys/syscall.h>
18#include "hostfs.h"
19#include <utime.h>
20
21static void stat64_to_hostfs(const struct stat64 *buf, struct hostfs_stat *p)
22{
23 p->ino = buf->st_ino;
24 p->mode = buf->st_mode;
25 p->nlink = buf->st_nlink;
26 p->uid = buf->st_uid;
27 p->gid = buf->st_gid;
28 p->size = buf->st_size;
29 p->atime.tv_sec = buf->st_atime;
30 p->atime.tv_nsec = 0;
31 p->ctime.tv_sec = buf->st_ctime;
32 p->ctime.tv_nsec = 0;
33 p->mtime.tv_sec = buf->st_mtime;
34 p->mtime.tv_nsec = 0;
35 p->blksize = buf->st_blksize;
36 p->blocks = buf->st_blocks;
37 p->rdev.maj = os_major(buf->st_rdev);
38 p->rdev.min = os_minor(buf->st_rdev);
39 p->dev.maj = os_major(buf->st_dev);
40 p->dev.min = os_minor(buf->st_dev);
41}
42
43int stat_file(const char *path, struct hostfs_stat *p, int fd)
44{
45 struct stat64 buf;
46
47 if (fd >= 0) {
48 if (fstat64(fd, &buf) < 0)
49 return -errno;
50 } else if (lstat64(path, &buf) < 0) {
51 return -errno;
52 }
53 stat64_to_hostfs(&buf, p);
54 return 0;
55}
56
57int access_file(char *path, int r, int w, int x)
58{
59 int mode = 0;
60
61 if (r)
62 mode = R_OK;
63 if (w)
64 mode |= W_OK;
65 if (x)
66 mode |= X_OK;
67 if (access(path, mode) != 0)
68 return -errno;
69 else return 0;
70}
71
72int open_file(char *path, int r, int w, int append)
73{
74 int mode = 0, fd;
75
76 if (r && !w)
77 mode = O_RDONLY;
78 else if (!r && w)
79 mode = O_WRONLY;
80 else if (r && w)
81 mode = O_RDWR;
82 else panic("Impossible mode in open_file");
83
84 if (append)
85 mode |= O_APPEND;
86 fd = open64(path, mode);
87 if (fd < 0)
88 return -errno;
89 else return fd;
90}
91
92void *open_dir(char *path, int *err_out)
93{
94 DIR *dir;
95
96 dir = opendir(path);
97 *err_out = errno;
98
99 return dir;
100}
101
102void seek_dir(void *stream, unsigned long long pos)
103{
104 DIR *dir = stream;
105
106 seekdir(dir, pos);
107}
108
109char *read_dir(void *stream, unsigned long long *pos_out,
110 unsigned long long *ino_out, int *len_out,
111 unsigned int *type_out)
112{
113 DIR *dir = stream;
114 struct dirent *ent;
115
116 ent = readdir(dir);
117 if (ent == NULL)
118 return NULL;
119 *len_out = strlen(ent->d_name);
120 *ino_out = ent->d_ino;
121 *type_out = ent->d_type;
122 *pos_out = ent->d_off;
123 return ent->d_name;
124}
125
126int read_file(int fd, unsigned long long *offset, char *buf, int len)
127{
128 int n;
129
130 n = pread64(fd, buf, len, *offset);
131 if (n < 0)
132 return -errno;
133 *offset += n;
134 return n;
135}
136
137int write_file(int fd, unsigned long long *offset, const char *buf, int len)
138{
139 int n;
140
141 n = pwrite64(fd, buf, len, *offset);
142 if (n < 0)
143 return -errno;
144 *offset += n;
145 return n;
146}
147
148int lseek_file(int fd, long long offset, int whence)
149{
150 int ret;
151
152 ret = lseek64(fd, offset, whence);
153 if (ret < 0)
154 return -errno;
155 return 0;
156}
157
158int fsync_file(int fd, int datasync)
159{
160 int ret;
161 if (datasync)
162 ret = fdatasync(fd);
163 else
164 ret = fsync(fd);
165
166 if (ret < 0)
167 return -errno;
168 return 0;
169}
170
171int replace_file(int oldfd, int fd)
172{
173 return dup2(oldfd, fd);
174}
175
176void close_file(void *stream)
177{
178 close(*((int *) stream));
179}
180
181void close_dir(void *stream)
182{
183 closedir(stream);
184}
185
186int file_create(char *name, int mode)
187{
188 int fd;
189
190 fd = open64(name, O_CREAT | O_RDWR, mode);
191 if (fd < 0)
192 return -errno;
193 return fd;
194}
195
196int set_attr(const char *file, struct hostfs_iattr *attrs, int fd)
197{
198 struct hostfs_stat st;
199 struct timeval times[2];
200 int err, ma;
201
202 if (attrs->ia_valid & HOSTFS_ATTR_MODE) {
203 if (fd >= 0) {
204 if (fchmod(fd, attrs->ia_mode) != 0)
205 return -errno;
206 } else if (chmod(file, attrs->ia_mode) != 0) {
207 return -errno;
208 }
209 }
210 if (attrs->ia_valid & HOSTFS_ATTR_UID) {
211 if (fd >= 0) {
212 if (fchown(fd, attrs->ia_uid, -1))
213 return -errno;
214 } else if (chown(file, attrs->ia_uid, -1)) {
215 return -errno;
216 }
217 }
218 if (attrs->ia_valid & HOSTFS_ATTR_GID) {
219 if (fd >= 0) {
220 if (fchown(fd, -1, attrs->ia_gid))
221 return -errno;
222 } else if (chown(file, -1, attrs->ia_gid)) {
223 return -errno;
224 }
225 }
226 if (attrs->ia_valid & HOSTFS_ATTR_SIZE) {
227 if (fd >= 0) {
228 if (ftruncate(fd, attrs->ia_size))
229 return -errno;
230 } else if (truncate(file, attrs->ia_size)) {
231 return -errno;
232 }
233 }
234
235 /*
236 * Update accessed and/or modified time, in two parts: first set
237 * times according to the changes to perform, and then call futimes()
238 * or utimes() to apply them.
239 */
240 ma = (HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET);
241 if (attrs->ia_valid & ma) {
242 err = stat_file(file, &st, fd);
243 if (err != 0)
244 return err;
245
246 times[0].tv_sec = st.atime.tv_sec;
247 times[0].tv_usec = st.atime.tv_nsec / 1000;
248 times[1].tv_sec = st.mtime.tv_sec;
249 times[1].tv_usec = st.mtime.tv_nsec / 1000;
250
251 if (attrs->ia_valid & HOSTFS_ATTR_ATIME_SET) {
252 times[0].tv_sec = attrs->ia_atime.tv_sec;
253 times[0].tv_usec = attrs->ia_atime.tv_nsec / 1000;
254 }
255 if (attrs->ia_valid & HOSTFS_ATTR_MTIME_SET) {
256 times[1].tv_sec = attrs->ia_mtime.tv_sec;
257 times[1].tv_usec = attrs->ia_mtime.tv_nsec / 1000;
258 }
259
260 if (fd >= 0) {
261 if (futimes(fd, times) != 0)
262 return -errno;
263 } else if (utimes(file, times) != 0) {
264 return -errno;
265 }
266 }
267
268 /* Note: ctime is not handled */
269 if (attrs->ia_valid & (HOSTFS_ATTR_ATIME | HOSTFS_ATTR_MTIME)) {
270 err = stat_file(file, &st, fd);
271 attrs->ia_atime = st.atime;
272 attrs->ia_mtime = st.mtime;
273 if (err != 0)
274 return err;
275 }
276 return 0;
277}
278
279int make_symlink(const char *from, const char *to)
280{
281 int err;
282
283 err = symlink(to, from);
284 if (err)
285 return -errno;
286 return 0;
287}
288
289int unlink_file(const char *file)
290{
291 int err;
292
293 err = unlink(file);
294 if (err)
295 return -errno;
296 return 0;
297}
298
299int do_mkdir(const char *file, int mode)
300{
301 int err;
302
303 err = mkdir(file, mode);
304 if (err)
305 return -errno;
306 return 0;
307}
308
309int hostfs_do_rmdir(const char *file)
310{
311 int err;
312
313 err = rmdir(file);
314 if (err)
315 return -errno;
316 return 0;
317}
318
319int do_mknod(const char *file, int mode, unsigned int major, unsigned int minor)
320{
321 int err;
322
323 err = mknod(file, mode, os_makedev(major, minor));
324 if (err)
325 return -errno;
326 return 0;
327}
328
329int link_file(const char *to, const char *from)
330{
331 int err;
332
333 err = link(to, from);
334 if (err)
335 return -errno;
336 return 0;
337}
338
339int hostfs_do_readlink(char *file, char *buf, int size)
340{
341 int n;
342
343 n = readlink(file, buf, size);
344 if (n < 0)
345 return -errno;
346 if (n < size)
347 buf[n] = '\0';
348 return n;
349}
350
351int rename_file(char *from, char *to)
352{
353 int err;
354
355 err = rename(from, to);
356 if (err < 0)
357 return -errno;
358 return 0;
359}
360
361int rename2_file(char *from, char *to, unsigned int flags)
362{
363 int err;
364
365#ifndef SYS_renameat2
366# ifdef __x86_64__
367# define SYS_renameat2 316
368# endif
369# ifdef __i386__
370# define SYS_renameat2 353
371# endif
372#endif
373
374#ifdef SYS_renameat2
375 err = syscall(SYS_renameat2, AT_FDCWD, from, AT_FDCWD, to, flags);
376 if (err < 0) {
377 if (errno != ENOSYS)
378 return -errno;
379 else
380 return -EINVAL;
381 }
382 return 0;
383#else
384 return -EINVAL;
385#endif
386}
387
388int do_statfs(char *root, long *bsize_out, long long *blocks_out,
389 long long *bfree_out, long long *bavail_out,
390 long long *files_out, long long *ffree_out,
391 void *fsid_out, int fsid_size, long *namelen_out)
392{
393 struct statfs64 buf;
394 int err;
395
396 err = statfs64(root, &buf);
397 if (err < 0)
398 return -errno;
399
400 *bsize_out = buf.f_bsize;
401 *blocks_out = buf.f_blocks;
402 *bfree_out = buf.f_bfree;
403 *bavail_out = buf.f_bavail;
404 *files_out = buf.f_files;
405 *ffree_out = buf.f_ffree;
406 memcpy(fsid_out, &buf.f_fsid,
407 sizeof(buf.f_fsid) > fsid_size ? fsid_size :
408 sizeof(buf.f_fsid));
409 *namelen_out = buf.f_namelen;
410
411 return 0;
412}
1/*
2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
4 */
5
6#include <stdio.h>
7#include <stddef.h>
8#include <unistd.h>
9#include <dirent.h>
10#include <errno.h>
11#include <fcntl.h>
12#include <string.h>
13#include <sys/stat.h>
14#include <sys/time.h>
15#include <sys/types.h>
16#include <sys/vfs.h>
17#include <sys/syscall.h>
18#include "hostfs.h"
19#include <utime.h>
20
21static void stat64_to_hostfs(const struct stat64 *buf, struct hostfs_stat *p)
22{
23 p->ino = buf->st_ino;
24 p->mode = buf->st_mode;
25 p->nlink = buf->st_nlink;
26 p->uid = buf->st_uid;
27 p->gid = buf->st_gid;
28 p->size = buf->st_size;
29 p->atime.tv_sec = buf->st_atime;
30 p->atime.tv_nsec = 0;
31 p->ctime.tv_sec = buf->st_ctime;
32 p->ctime.tv_nsec = 0;
33 p->mtime.tv_sec = buf->st_mtime;
34 p->mtime.tv_nsec = 0;
35 p->blksize = buf->st_blksize;
36 p->blocks = buf->st_blocks;
37 p->maj = os_major(buf->st_rdev);
38 p->min = os_minor(buf->st_rdev);
39 p->dev = buf->st_dev;
40}
41
42int stat_file(const char *path, struct hostfs_stat *p, int fd)
43{
44 struct stat64 buf;
45
46 if (fd >= 0) {
47 if (fstat64(fd, &buf) < 0)
48 return -errno;
49 } else if (lstat64(path, &buf) < 0) {
50 return -errno;
51 }
52 stat64_to_hostfs(&buf, p);
53 return 0;
54}
55
56int access_file(char *path, int r, int w, int x)
57{
58 int mode = 0;
59
60 if (r)
61 mode = R_OK;
62 if (w)
63 mode |= W_OK;
64 if (x)
65 mode |= X_OK;
66 if (access(path, mode) != 0)
67 return -errno;
68 else return 0;
69}
70
71int open_file(char *path, int r, int w, int append)
72{
73 int mode = 0, fd;
74
75 if (r && !w)
76 mode = O_RDONLY;
77 else if (!r && w)
78 mode = O_WRONLY;
79 else if (r && w)
80 mode = O_RDWR;
81 else panic("Impossible mode in open_file");
82
83 if (append)
84 mode |= O_APPEND;
85 fd = open64(path, mode);
86 if (fd < 0)
87 return -errno;
88 else return fd;
89}
90
91void *open_dir(char *path, int *err_out)
92{
93 DIR *dir;
94
95 dir = opendir(path);
96 *err_out = errno;
97
98 return dir;
99}
100
101void seek_dir(void *stream, unsigned long long pos)
102{
103 DIR *dir = stream;
104
105 seekdir(dir, pos);
106}
107
108char *read_dir(void *stream, unsigned long long *pos_out,
109 unsigned long long *ino_out, int *len_out,
110 unsigned int *type_out)
111{
112 DIR *dir = stream;
113 struct dirent *ent;
114
115 ent = readdir(dir);
116 if (ent == NULL)
117 return NULL;
118 *len_out = strlen(ent->d_name);
119 *ino_out = ent->d_ino;
120 *type_out = ent->d_type;
121 *pos_out = ent->d_off;
122 return ent->d_name;
123}
124
125int read_file(int fd, unsigned long long *offset, char *buf, int len)
126{
127 int n;
128
129 n = pread64(fd, buf, len, *offset);
130 if (n < 0)
131 return -errno;
132 *offset += n;
133 return n;
134}
135
136int write_file(int fd, unsigned long long *offset, const char *buf, int len)
137{
138 int n;
139
140 n = pwrite64(fd, buf, len, *offset);
141 if (n < 0)
142 return -errno;
143 *offset += n;
144 return n;
145}
146
147int lseek_file(int fd, long long offset, int whence)
148{
149 int ret;
150
151 ret = lseek64(fd, offset, whence);
152 if (ret < 0)
153 return -errno;
154 return 0;
155}
156
157int fsync_file(int fd, int datasync)
158{
159 int ret;
160 if (datasync)
161 ret = fdatasync(fd);
162 else
163 ret = fsync(fd);
164
165 if (ret < 0)
166 return -errno;
167 return 0;
168}
169
170int replace_file(int oldfd, int fd)
171{
172 return dup2(oldfd, fd);
173}
174
175void close_file(void *stream)
176{
177 close(*((int *) stream));
178}
179
180void close_dir(void *stream)
181{
182 closedir(stream);
183}
184
185int file_create(char *name, int mode)
186{
187 int fd;
188
189 fd = open64(name, O_CREAT | O_RDWR, mode);
190 if (fd < 0)
191 return -errno;
192 return fd;
193}
194
195int set_attr(const char *file, struct hostfs_iattr *attrs, int fd)
196{
197 struct hostfs_stat st;
198 struct timeval times[2];
199 int err, ma;
200
201 if (attrs->ia_valid & HOSTFS_ATTR_MODE) {
202 if (fd >= 0) {
203 if (fchmod(fd, attrs->ia_mode) != 0)
204 return -errno;
205 } else if (chmod(file, attrs->ia_mode) != 0) {
206 return -errno;
207 }
208 }
209 if (attrs->ia_valid & HOSTFS_ATTR_UID) {
210 if (fd >= 0) {
211 if (fchown(fd, attrs->ia_uid, -1))
212 return -errno;
213 } else if (chown(file, attrs->ia_uid, -1)) {
214 return -errno;
215 }
216 }
217 if (attrs->ia_valid & HOSTFS_ATTR_GID) {
218 if (fd >= 0) {
219 if (fchown(fd, -1, attrs->ia_gid))
220 return -errno;
221 } else if (chown(file, -1, attrs->ia_gid)) {
222 return -errno;
223 }
224 }
225 if (attrs->ia_valid & HOSTFS_ATTR_SIZE) {
226 if (fd >= 0) {
227 if (ftruncate(fd, attrs->ia_size))
228 return -errno;
229 } else if (truncate(file, attrs->ia_size)) {
230 return -errno;
231 }
232 }
233
234 /*
235 * Update accessed and/or modified time, in two parts: first set
236 * times according to the changes to perform, and then call futimes()
237 * or utimes() to apply them.
238 */
239 ma = (HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET);
240 if (attrs->ia_valid & ma) {
241 err = stat_file(file, &st, fd);
242 if (err != 0)
243 return err;
244
245 times[0].tv_sec = st.atime.tv_sec;
246 times[0].tv_usec = st.atime.tv_nsec / 1000;
247 times[1].tv_sec = st.mtime.tv_sec;
248 times[1].tv_usec = st.mtime.tv_nsec / 1000;
249
250 if (attrs->ia_valid & HOSTFS_ATTR_ATIME_SET) {
251 times[0].tv_sec = attrs->ia_atime.tv_sec;
252 times[0].tv_usec = attrs->ia_atime.tv_nsec / 1000;
253 }
254 if (attrs->ia_valid & HOSTFS_ATTR_MTIME_SET) {
255 times[1].tv_sec = attrs->ia_mtime.tv_sec;
256 times[1].tv_usec = attrs->ia_mtime.tv_nsec / 1000;
257 }
258
259 if (fd >= 0) {
260 if (futimes(fd, times) != 0)
261 return -errno;
262 } else if (utimes(file, times) != 0) {
263 return -errno;
264 }
265 }
266
267 /* Note: ctime is not handled */
268 if (attrs->ia_valid & (HOSTFS_ATTR_ATIME | HOSTFS_ATTR_MTIME)) {
269 err = stat_file(file, &st, fd);
270 attrs->ia_atime = st.atime;
271 attrs->ia_mtime = st.mtime;
272 if (err != 0)
273 return err;
274 }
275 return 0;
276}
277
278int make_symlink(const char *from, const char *to)
279{
280 int err;
281
282 err = symlink(to, from);
283 if (err)
284 return -errno;
285 return 0;
286}
287
288int unlink_file(const char *file)
289{
290 int err;
291
292 err = unlink(file);
293 if (err)
294 return -errno;
295 return 0;
296}
297
298int do_mkdir(const char *file, int mode)
299{
300 int err;
301
302 err = mkdir(file, mode);
303 if (err)
304 return -errno;
305 return 0;
306}
307
308int hostfs_do_rmdir(const char *file)
309{
310 int err;
311
312 err = rmdir(file);
313 if (err)
314 return -errno;
315 return 0;
316}
317
318int do_mknod(const char *file, int mode, unsigned int major, unsigned int minor)
319{
320 int err;
321
322 err = mknod(file, mode, os_makedev(major, minor));
323 if (err)
324 return -errno;
325 return 0;
326}
327
328int link_file(const char *to, const char *from)
329{
330 int err;
331
332 err = link(to, from);
333 if (err)
334 return -errno;
335 return 0;
336}
337
338int hostfs_do_readlink(char *file, char *buf, int size)
339{
340 int n;
341
342 n = readlink(file, buf, size);
343 if (n < 0)
344 return -errno;
345 if (n < size)
346 buf[n] = '\0';
347 return n;
348}
349
350int rename_file(char *from, char *to)
351{
352 int err;
353
354 err = rename(from, to);
355 if (err < 0)
356 return -errno;
357 return 0;
358}
359
360int rename2_file(char *from, char *to, unsigned int flags)
361{
362 int err;
363
364#ifndef SYS_renameat2
365# ifdef __x86_64__
366# define SYS_renameat2 316
367# endif
368# ifdef __i386__
369# define SYS_renameat2 353
370# endif
371#endif
372
373#ifdef SYS_renameat2
374 err = syscall(SYS_renameat2, AT_FDCWD, from, AT_FDCWD, to, flags);
375 if (err < 0) {
376 if (errno != ENOSYS)
377 return -errno;
378 else
379 return -EINVAL;
380 }
381 return 0;
382#else
383 return -EINVAL;
384#endif
385}
386
387int do_statfs(char *root, long *bsize_out, long long *blocks_out,
388 long long *bfree_out, long long *bavail_out,
389 long long *files_out, long long *ffree_out,
390 void *fsid_out, int fsid_size, long *namelen_out)
391{
392 struct statfs64 buf;
393 int err;
394
395 err = statfs64(root, &buf);
396 if (err < 0)
397 return -errno;
398
399 *bsize_out = buf.f_bsize;
400 *blocks_out = buf.f_blocks;
401 *bfree_out = buf.f_bfree;
402 *bavail_out = buf.f_bavail;
403 *files_out = buf.f_files;
404 *ffree_out = buf.f_ffree;
405 memcpy(fsid_out, &buf.f_fsid,
406 sizeof(buf.f_fsid) > fsid_size ? fsid_size :
407 sizeof(buf.f_fsid));
408 *namelen_out = buf.f_namelen;
409
410 return 0;
411}