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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 "os.h"
19#include "user.h"
20#include <utime.h>
21
22int stat_file(const char *path, unsigned long long *inode_out, int *mode_out,
23 int *nlink_out, int *uid_out, int *gid_out,
24 unsigned long long *size_out, struct timespec *atime_out,
25 struct timespec *mtime_out, struct timespec *ctime_out,
26 int *blksize_out, unsigned long long *blocks_out, int fd)
27{
28 struct stat64 buf;
29
30 if (fd >= 0) {
31 if (fstat64(fd, &buf) < 0)
32 return -errno;
33 } else if (lstat64(path, &buf) < 0) {
34 return -errno;
35 }
36
37 if (inode_out != NULL)
38 *inode_out = buf.st_ino;
39 if (mode_out != NULL)
40 *mode_out = buf.st_mode;
41 if (nlink_out != NULL)
42 *nlink_out = buf.st_nlink;
43 if (uid_out != NULL)
44 *uid_out = buf.st_uid;
45 if (gid_out != NULL)
46 *gid_out = buf.st_gid;
47 if (size_out != NULL)
48 *size_out = buf.st_size;
49 if (atime_out != NULL) {
50 atime_out->tv_sec = buf.st_atime;
51 atime_out->tv_nsec = 0;
52 }
53 if (mtime_out != NULL) {
54 mtime_out->tv_sec = buf.st_mtime;
55 mtime_out->tv_nsec = 0;
56 }
57 if (ctime_out != NULL) {
58 ctime_out->tv_sec = buf.st_ctime;
59 ctime_out->tv_nsec = 0;
60 }
61 if (blksize_out != NULL)
62 *blksize_out = buf.st_blksize;
63 if (blocks_out != NULL)
64 *blocks_out = buf.st_blocks;
65 return 0;
66}
67
68int file_type(const char *path, int *maj, int *min)
69{
70 struct stat64 buf;
71
72 if (lstat64(path, &buf) < 0)
73 return -errno;
74
75
76
77
78 if (maj != NULL)
79 *maj = major(buf.st_rdev);
80 if (min != NULL)
81 *min = minor(buf.st_rdev);
82
83 if (S_ISDIR(buf.st_mode))
84 return OS_TYPE_DIR;
85 else if (S_ISLNK(buf.st_mode))
86 return OS_TYPE_SYMLINK;
87 else if (S_ISCHR(buf.st_mode))
88 return OS_TYPE_CHARDEV;
89 else if (S_ISBLK(buf.st_mode))
90 return OS_TYPE_BLOCKDEV;
91 else if (S_ISFIFO(buf.st_mode))
92 return OS_TYPE_FIFO;
93 else if (S_ISSOCK(buf.st_mode))
94 return OS_TYPE_SOCK;
95 else return OS_TYPE_FILE;
96}
97
98int access_file(char *path, int r, int w, int x)
99{
100 int mode = 0;
101
102 if (r)
103 mode = R_OK;
104 if (w)
105 mode |= W_OK;
106 if (x)
107 mode |= X_OK;
108 if (access(path, mode) != 0)
109 return -errno;
110 else return 0;
111}
112
113int open_file(char *path, int r, int w, int append)
114{
115 int mode = 0, fd;
116
117 if (r && !w)
118 mode = O_RDONLY;
119 else if (!r && w)
120 mode = O_WRONLY;
121 else if (r && w)
122 mode = O_RDWR;
123 else panic("Impossible mode in open_file");
124
125 if (append)
126 mode |= O_APPEND;
127 fd = open64(path, mode);
128 if (fd < 0)
129 return -errno;
130 else return fd;
131}
132
133void *open_dir(char *path, int *err_out)
134{
135 DIR *dir;
136
137 dir = opendir(path);
138 *err_out = errno;
139 if (dir == NULL)
140 return NULL;
141 return dir;
142}
143
144char *read_dir(void *stream, unsigned long long *pos,
145 unsigned long long *ino_out, int *len_out)
146{
147 DIR *dir = stream;
148 struct dirent *ent;
149
150 seekdir(dir, *pos);
151 ent = readdir(dir);
152 if (ent == NULL)
153 return NULL;
154 *len_out = strlen(ent->d_name);
155 *ino_out = ent->d_ino;
156 *pos = telldir(dir);
157 return ent->d_name;
158}
159
160int read_file(int fd, unsigned long long *offset, char *buf, int len)
161{
162 int n;
163
164 n = pread64(fd, buf, len, *offset);
165 if (n < 0)
166 return -errno;
167 *offset += n;
168 return n;
169}
170
171int write_file(int fd, unsigned long long *offset, const char *buf, int len)
172{
173 int n;
174
175 n = pwrite64(fd, buf, len, *offset);
176 if (n < 0)
177 return -errno;
178 *offset += n;
179 return n;
180}
181
182int lseek_file(int fd, long long offset, int whence)
183{
184 int ret;
185
186 ret = lseek64(fd, offset, whence);
187 if (ret < 0)
188 return -errno;
189 return 0;
190}
191
192int fsync_file(int fd, int datasync)
193{
194 int ret;
195 if (datasync)
196 ret = fdatasync(fd);
197 else
198 ret = fsync(fd);
199
200 if (ret < 0)
201 return -errno;
202 return 0;
203}
204
205void close_file(void *stream)
206{
207 close(*((int *) stream));
208}
209
210void close_dir(void *stream)
211{
212 closedir(stream);
213}
214
215int file_create(char *name, int ur, int uw, int ux, int gr,
216 int gw, int gx, int or, int ow, int ox)
217{
218 int mode, fd;
219
220 mode = 0;
221 mode |= ur ? S_IRUSR : 0;
222 mode |= uw ? S_IWUSR : 0;
223 mode |= ux ? S_IXUSR : 0;
224 mode |= gr ? S_IRGRP : 0;
225 mode |= gw ? S_IWGRP : 0;
226 mode |= gx ? S_IXGRP : 0;
227 mode |= or ? S_IROTH : 0;
228 mode |= ow ? S_IWOTH : 0;
229 mode |= ox ? S_IXOTH : 0;
230 fd = open64(name, O_CREAT | O_RDWR, mode);
231 if (fd < 0)
232 return -errno;
233 return fd;
234}
235
236int set_attr(const char *file, struct hostfs_iattr *attrs, int fd)
237{
238 struct timeval times[2];
239 struct timespec atime_ts, mtime_ts;
240 int err, ma;
241
242 if (attrs->ia_valid & HOSTFS_ATTR_MODE) {
243 if (fd >= 0) {
244 if (fchmod(fd, attrs->ia_mode) != 0)
245 return (-errno);
246 } else if (chmod(file, attrs->ia_mode) != 0) {
247 return -errno;
248 }
249 }
250 if (attrs->ia_valid & HOSTFS_ATTR_UID) {
251 if (fd >= 0) {
252 if (fchown(fd, attrs->ia_uid, -1))
253 return -errno;
254 } else if (chown(file, attrs->ia_uid, -1)) {
255 return -errno;
256 }
257 }
258 if (attrs->ia_valid & HOSTFS_ATTR_GID) {
259 if (fd >= 0) {
260 if (fchown(fd, -1, attrs->ia_gid))
261 return -errno;
262 } else if (chown(file, -1, attrs->ia_gid)) {
263 return -errno;
264 }
265 }
266 if (attrs->ia_valid & HOSTFS_ATTR_SIZE) {
267 if (fd >= 0) {
268 if (ftruncate(fd, attrs->ia_size))
269 return -errno;
270 } else if (truncate(file, attrs->ia_size)) {
271 return -errno;
272 }
273 }
274
275
276
277
278
279
280 ma = (HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET);
281 if (attrs->ia_valid & ma) {
282 err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL,
283 &atime_ts, &mtime_ts, NULL, NULL, NULL, fd);
284 if (err != 0)
285 return err;
286
287 times[0].tv_sec = atime_ts.tv_sec;
288 times[0].tv_usec = atime_ts.tv_nsec / 1000;
289 times[1].tv_sec = mtime_ts.tv_sec;
290 times[1].tv_usec = mtime_ts.tv_nsec / 1000;
291
292 if (attrs->ia_valid & HOSTFS_ATTR_ATIME_SET) {
293 times[0].tv_sec = attrs->ia_atime.tv_sec;
294 times[0].tv_usec = attrs->ia_atime.tv_nsec / 1000;
295 }
296 if (attrs->ia_valid & HOSTFS_ATTR_MTIME_SET) {
297 times[1].tv_sec = attrs->ia_mtime.tv_sec;
298 times[1].tv_usec = attrs->ia_mtime.tv_nsec / 1000;
299 }
300
301 if (fd >= 0) {
302 if (futimes(fd, times) != 0)
303 return -errno;
304 } else if (utimes(file, times) != 0) {
305 return -errno;
306 }
307 }
308
309
310 if (attrs->ia_valid & (HOSTFS_ATTR_ATIME | HOSTFS_ATTR_MTIME)) {
311 err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL,
312 &attrs->ia_atime, &attrs->ia_mtime, NULL,
313 NULL, NULL, fd);
314 if (err != 0)
315 return err;
316 }
317 return 0;
318}
319
320int make_symlink(const char *from, const char *to)
321{
322 int err;
323
324 err = symlink(to, from);
325 if (err)
326 return -errno;
327 return 0;
328}
329
330int unlink_file(const char *file)
331{
332 int err;
333
334 err = unlink(file);
335 if (err)
336 return -errno;
337 return 0;
338}
339
340int do_mkdir(const char *file, int mode)
341{
342 int err;
343
344 err = mkdir(file, mode);
345 if (err)
346 return -errno;
347 return 0;
348}
349
350int do_rmdir(const char *file)
351{
352 int err;
353
354 err = rmdir(file);
355 if (err)
356 return -errno;
357 return 0;
358}
359
360int do_mknod(const char *file, int mode, unsigned int major, unsigned int minor)
361{
362 int err;
363
364 err = mknod(file, mode, makedev(major, minor));
365 if (err)
366 return -errno;
367 return 0;
368}
369
370int link_file(const char *to, const char *from)
371{
372 int err;
373
374 err = link(to, from);
375 if (err)
376 return -errno;
377 return 0;
378}
379
380int hostfs_do_readlink(char *file, char *buf, int size)
381{
382 int n;
383
384 n = readlink(file, buf, size);
385 if (n < 0)
386 return -errno;
387 if (n < size)
388 buf[n] = '\0';
389 return n;
390}
391
392int rename_file(char *from, char *to)
393{
394 int err;
395
396 err = rename(from, to);
397 if (err < 0)
398 return -errno;
399 return 0;
400}
401
402int do_statfs(char *root, long *bsize_out, long long *blocks_out,
403 long long *bfree_out, long long *bavail_out,
404 long long *files_out, long long *ffree_out,
405 void *fsid_out, int fsid_size, long *namelen_out,
406 long *spare_out)
407{
408 struct statfs64 buf;
409 int err;
410
411 err = statfs64(root, &buf);
412 if (err < 0)
413 return -errno;
414
415 *bsize_out = buf.f_bsize;
416 *blocks_out = buf.f_blocks;
417 *bfree_out = buf.f_bfree;
418 *bavail_out = buf.f_bavail;
419 *files_out = buf.f_files;
420 *ffree_out = buf.f_ffree;
421 memcpy(fsid_out, &buf.f_fsid,
422 sizeof(buf.f_fsid) > fsid_size ? fsid_size :
423 sizeof(buf.f_fsid));
424 *namelen_out = buf.f_namelen;
425 spare_out[0] = buf.f_spare[0];
426 spare_out[1] = buf.f_spare[1];
427 spare_out[2] = buf.f_spare[2];
428 spare_out[3] = buf.f_spare[3];
429 spare_out[4] = buf.f_spare[4];
430 return 0;
431}
432
