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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 <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}