Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
f1adc05e | 2 | * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
1da177e4 LT |
3 | * Licensed under the GPL |
4 | */ | |
5 | ||
1da177e4 | 6 | #include <stdio.h> |
84b3db04 JD |
7 | #include <stddef.h> |
8 | #include <unistd.h> | |
1da177e4 LT |
9 | #include <dirent.h> |
10 | #include <errno.h> | |
84b3db04 | 11 | #include <fcntl.h> |
1da177e4 LT |
12 | #include <string.h> |
13 | #include <sys/stat.h> | |
14 | #include <sys/time.h> | |
84b3db04 | 15 | #include <sys/types.h> |
1da177e4 LT |
16 | #include <sys/vfs.h> |
17 | #include "hostfs.h" | |
84b3db04 | 18 | #include "os.h" |
1da177e4 | 19 | #include "user.h" |
84b3db04 | 20 | #include <utime.h> |
1da177e4 | 21 | |
39b743c6 AV |
22 | static void stat64_to_hostfs(const struct stat64 *buf, struct hostfs_stat *p) |
23 | { | |
24 | p->ino = buf->st_ino; | |
25 | p->mode = buf->st_mode; | |
26 | p->nlink = buf->st_nlink; | |
27 | p->uid = buf->st_uid; | |
28 | p->gid = buf->st_gid; | |
29 | p->size = buf->st_size; | |
30 | p->atime.tv_sec = buf->st_atime; | |
31 | p->atime.tv_nsec = 0; | |
32 | p->ctime.tv_sec = buf->st_ctime; | |
33 | p->ctime.tv_nsec = 0; | |
34 | p->mtime.tv_sec = buf->st_mtime; | |
35 | p->mtime.tv_nsec = 0; | |
36 | p->blksize = buf->st_blksize; | |
37 | p->blocks = buf->st_blocks; | |
38 | p->maj = os_major(buf->st_rdev); | |
39 | p->min = os_minor(buf->st_rdev); | |
40 | } | |
41 | ||
42 | int stat_file(const char *path, struct hostfs_stat *p, int fd) | |
1da177e4 LT |
43 | { |
44 | struct stat64 buf; | |
45 | ||
84b3db04 | 46 | if (fd >= 0) { |
5822b7fa | 47 | if (fstat64(fd, &buf) < 0) |
f1adc05e | 48 | return -errno; |
84b3db04 | 49 | } else if (lstat64(path, &buf) < 0) { |
f1adc05e | 50 | return -errno; |
5822b7fa | 51 | } |
39b743c6 | 52 | stat64_to_hostfs(&buf, p); |
f1adc05e | 53 | return 0; |
1da177e4 LT |
54 | } |
55 | ||
1da177e4 LT |
56 | int access_file(char *path, int r, int w, int x) |
57 | { | |
58 | int mode = 0; | |
59 | ||
84b3db04 JD |
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) | |
f1adc05e JD |
67 | return -errno; |
68 | else return 0; | |
1da177e4 LT |
69 | } |
70 | ||
71 | int open_file(char *path, int r, int w, int append) | |
72 | { | |
73 | int mode = 0, fd; | |
74 | ||
84b3db04 | 75 | if (r && !w) |
1da177e4 | 76 | mode = O_RDONLY; |
84b3db04 | 77 | else if (!r && w) |
1da177e4 | 78 | mode = O_WRONLY; |
84b3db04 | 79 | else if (r && w) |
1da177e4 LT |
80 | mode = O_RDWR; |
81 | else panic("Impossible mode in open_file"); | |
82 | ||
84b3db04 | 83 | if (append) |
1da177e4 LT |
84 | mode |= O_APPEND; |
85 | fd = open64(path, mode); | |
84b3db04 | 86 | if (fd < 0) |
f1adc05e JD |
87 | return -errno; |
88 | else return fd; | |
1da177e4 LT |
89 | } |
90 | ||
91 | void *open_dir(char *path, int *err_out) | |
92 | { | |
93 | DIR *dir; | |
94 | ||
95 | dir = opendir(path); | |
96 | *err_out = errno; | |
c5c6dd4e | 97 | |
f1adc05e | 98 | return dir; |
1da177e4 LT |
99 | } |
100 | ||
101 | char *read_dir(void *stream, unsigned long long *pos, | |
102 | unsigned long long *ino_out, int *len_out) | |
103 | { | |
104 | DIR *dir = stream; | |
105 | struct dirent *ent; | |
106 | ||
107 | seekdir(dir, *pos); | |
108 | ent = readdir(dir); | |
84b3db04 | 109 | if (ent == NULL) |
f1adc05e | 110 | return NULL; |
1da177e4 LT |
111 | *len_out = strlen(ent->d_name); |
112 | *ino_out = ent->d_ino; | |
113 | *pos = telldir(dir); | |
f1adc05e | 114 | return ent->d_name; |
1da177e4 LT |
115 | } |
116 | ||
117 | int read_file(int fd, unsigned long long *offset, char *buf, int len) | |
118 | { | |
119 | int n; | |
120 | ||
121 | n = pread64(fd, buf, len, *offset); | |
84b3db04 | 122 | if (n < 0) |
f1adc05e | 123 | return -errno; |
1da177e4 | 124 | *offset += n; |
f1adc05e | 125 | return n; |
1da177e4 LT |
126 | } |
127 | ||
128 | int 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); | |
84b3db04 | 133 | if (n < 0) |
f1adc05e | 134 | return -errno; |
1da177e4 | 135 | *offset += n; |
f1adc05e | 136 | return n; |
1da177e4 LT |
137 | } |
138 | ||
139 | int lseek_file(int fd, long long offset, int whence) | |
140 | { | |
141 | int ret; | |
142 | ||
143 | ret = lseek64(fd, offset, whence); | |
84b3db04 | 144 | if (ret < 0) |
f1adc05e JD |
145 | return -errno; |
146 | return 0; | |
1da177e4 LT |
147 | } |
148 | ||
a2d76bd8 PBG |
149 | int 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 | ||
f8ad850f AV |
162 | int replace_file(int oldfd, int fd) |
163 | { | |
164 | return dup2(oldfd, fd); | |
165 | } | |
166 | ||
1da177e4 LT |
167 | void close_file(void *stream) |
168 | { | |
169 | close(*((int *) stream)); | |
170 | } | |
171 | ||
172 | void close_dir(void *stream) | |
173 | { | |
174 | closedir(stream); | |
175 | } | |
176 | ||
177 | int 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); | |
84b3db04 | 193 | if (fd < 0) |
f1adc05e JD |
194 | return -errno; |
195 | return fd; | |
1da177e4 LT |
196 | } |
197 | ||
5822b7fa | 198 | int set_attr(const char *file, struct hostfs_iattr *attrs, int fd) |
1da177e4 | 199 | { |
39b743c6 | 200 | struct hostfs_stat st; |
5822b7fa | 201 | struct timeval times[2]; |
1da177e4 LT |
202 | int err, ma; |
203 | ||
5822b7fa AB |
204 | if (attrs->ia_valid & HOSTFS_ATTR_MODE) { |
205 | if (fd >= 0) { | |
206 | if (fchmod(fd, attrs->ia_mode) != 0) | |
c5c6dd4e | 207 | return -errno; |
5822b7fa | 208 | } else if (chmod(file, attrs->ia_mode) != 0) { |
f1adc05e | 209 | return -errno; |
5822b7fa | 210 | } |
1da177e4 | 211 | } |
5822b7fa AB |
212 | if (attrs->ia_valid & HOSTFS_ATTR_UID) { |
213 | if (fd >= 0) { | |
214 | if (fchown(fd, attrs->ia_uid, -1)) | |
f1adc05e | 215 | return -errno; |
84b3db04 | 216 | } else if (chown(file, attrs->ia_uid, -1)) { |
f1adc05e | 217 | return -errno; |
5822b7fa | 218 | } |
1da177e4 | 219 | } |
5822b7fa AB |
220 | if (attrs->ia_valid & HOSTFS_ATTR_GID) { |
221 | if (fd >= 0) { | |
222 | if (fchown(fd, -1, attrs->ia_gid)) | |
f1adc05e | 223 | return -errno; |
5822b7fa | 224 | } else if (chown(file, -1, attrs->ia_gid)) { |
f1adc05e | 225 | return -errno; |
5822b7fa | 226 | } |
1da177e4 | 227 | } |
5822b7fa AB |
228 | if (attrs->ia_valid & HOSTFS_ATTR_SIZE) { |
229 | if (fd >= 0) { | |
230 | if (ftruncate(fd, attrs->ia_size)) | |
f1adc05e | 231 | return -errno; |
5822b7fa | 232 | } else if (truncate(file, attrs->ia_size)) { |
f1adc05e | 233 | return -errno; |
5822b7fa | 234 | } |
1da177e4 | 235 | } |
5822b7fa | 236 | |
84b3db04 JD |
237 | /* |
238 | * Update accessed and/or modified time, in two parts: first set | |
5822b7fa | 239 | * times according to the changes to perform, and then call futimes() |
84b3db04 JD |
240 | * or utimes() to apply them. |
241 | */ | |
5822b7fa AB |
242 | ma = (HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET); |
243 | if (attrs->ia_valid & ma) { | |
39b743c6 | 244 | err = stat_file(file, &st, fd); |
5822b7fa AB |
245 | if (err != 0) |
246 | return err; | |
247 | ||
39b743c6 AV |
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; | |
5822b7fa AB |
252 | |
253 | if (attrs->ia_valid & HOSTFS_ATTR_ATIME_SET) { | |
254 | times[0].tv_sec = attrs->ia_atime.tv_sec; | |
d7b88513 | 255 | times[0].tv_usec = attrs->ia_atime.tv_nsec / 1000; |
1da177e4 | 256 | } |
5822b7fa AB |
257 | if (attrs->ia_valid & HOSTFS_ATTR_MTIME_SET) { |
258 | times[1].tv_sec = attrs->ia_mtime.tv_sec; | |
d7b88513 | 259 | times[1].tv_usec = attrs->ia_mtime.tv_nsec / 1000; |
5822b7fa AB |
260 | } |
261 | ||
262 | if (fd >= 0) { | |
263 | if (futimes(fd, times) != 0) | |
f1adc05e | 264 | return -errno; |
5822b7fa | 265 | } else if (utimes(file, times) != 0) { |
f1adc05e | 266 | return -errno; |
1da177e4 LT |
267 | } |
268 | } | |
5822b7fa | 269 | |
baabd156 | 270 | /* Note: ctime is not handled */ |
84b3db04 | 271 | if (attrs->ia_valid & (HOSTFS_ATTR_ATIME | HOSTFS_ATTR_MTIME)) { |
39b743c6 AV |
272 | err = stat_file(file, &st, fd); |
273 | attrs->ia_atime = st.atime; | |
274 | attrs->ia_mtime = st.mtime; | |
84b3db04 | 275 | if (err != 0) |
f1adc05e | 276 | return err; |
1da177e4 | 277 | } |
f1adc05e | 278 | return 0; |
1da177e4 LT |
279 | } |
280 | ||
281 | int make_symlink(const char *from, const char *to) | |
282 | { | |
283 | int err; | |
284 | ||
285 | err = symlink(to, from); | |
84b3db04 | 286 | if (err) |
f1adc05e JD |
287 | return -errno; |
288 | return 0; | |
1da177e4 LT |
289 | } |
290 | ||
291 | int unlink_file(const char *file) | |
292 | { | |
293 | int err; | |
294 | ||
295 | err = unlink(file); | |
84b3db04 | 296 | if (err) |
f1adc05e JD |
297 | return -errno; |
298 | return 0; | |
1da177e4 LT |
299 | } |
300 | ||
301 | int do_mkdir(const char *file, int mode) | |
302 | { | |
303 | int err; | |
304 | ||
305 | err = mkdir(file, mode); | |
84b3db04 | 306 | if (err) |
f1adc05e JD |
307 | return -errno; |
308 | return 0; | |
1da177e4 LT |
309 | } |
310 | ||
311 | int do_rmdir(const char *file) | |
312 | { | |
313 | int err; | |
314 | ||
315 | err = rmdir(file); | |
84b3db04 | 316 | if (err) |
f1adc05e JD |
317 | return -errno; |
318 | return 0; | |
1da177e4 LT |
319 | } |
320 | ||
88f6cd0c | 321 | int do_mknod(const char *file, int mode, unsigned int major, unsigned int minor) |
1da177e4 LT |
322 | { |
323 | int err; | |
324 | ||
005a59ec | 325 | err = mknod(file, mode, os_makedev(major, minor)); |
84b3db04 | 326 | if (err) |
f1adc05e JD |
327 | return -errno; |
328 | return 0; | |
1da177e4 LT |
329 | } |
330 | ||
331 | int link_file(const char *to, const char *from) | |
332 | { | |
333 | int err; | |
334 | ||
335 | err = link(to, from); | |
84b3db04 | 336 | if (err) |
f1adc05e JD |
337 | return -errno; |
338 | return 0; | |
1da177e4 LT |
339 | } |
340 | ||
ea7e743e | 341 | int hostfs_do_readlink(char *file, char *buf, int size) |
1da177e4 LT |
342 | { |
343 | int n; | |
344 | ||
345 | n = readlink(file, buf, size); | |
84b3db04 | 346 | if (n < 0) |
f1adc05e | 347 | return -errno; |
84b3db04 | 348 | if (n < size) |
1da177e4 | 349 | buf[n] = '\0'; |
f1adc05e | 350 | return n; |
1da177e4 LT |
351 | } |
352 | ||
353 | int rename_file(char *from, char *to) | |
354 | { | |
355 | int err; | |
356 | ||
357 | err = rename(from, to); | |
84b3db04 | 358 | if (err < 0) |
f1adc05e JD |
359 | return -errno; |
360 | return 0; | |
1da177e4 LT |
361 | } |
362 | ||
363 | int 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, | |
1b627d57 | 366 | void *fsid_out, int fsid_size, long *namelen_out) |
1da177e4 LT |
367 | { |
368 | struct statfs64 buf; | |
369 | int err; | |
370 | ||
371 | err = statfs64(root, &buf); | |
84b3db04 | 372 | if (err < 0) |
f1adc05e JD |
373 | return -errno; |
374 | ||
1da177e4 LT |
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; | |
1b627d57 | 385 | |
f1adc05e | 386 | return 0; |
1da177e4 | 387 | } |