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