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