blob: b79424f9328298e60bdae763ffd85669d1d96214 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeff Dikef1adc052007-05-08 00:23:18 -07002 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 * Licensed under the GPL
4 */
5
Linus Torvalds1da177e2005-04-16 15:20:36 -07006#include <stdio.h>
Jeff Dike84b3db02007-10-16 01:27:13 -07007#include <stddef.h>
8#include <unistd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <dirent.h>
10#include <errno.h>
Jeff Dike84b3db02007-10-16 01:27:13 -070011#include <fcntl.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <string.h>
13#include <sys/stat.h>
14#include <sys/time.h>
Jeff Dike84b3db02007-10-16 01:27:13 -070015#include <sys/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <sys/vfs.h>
17#include "hostfs.h"
Jeff Dike84b3db02007-10-16 01:27:13 -070018#include "os.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include "user.h"
Jeff Dike84b3db02007-10-16 01:27:13 -070020#include <utime.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021
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,
Alberto Bertogli5822b7f2007-05-08 00:23:16 -070026 int *blksize_out, unsigned long long *blocks_out, int fd)
Linus Torvalds1da177e2005-04-16 15:20:36 -070027{
28 struct stat64 buf;
29
Jeff Dike84b3db02007-10-16 01:27:13 -070030 if (fd >= 0) {
Alberto Bertogli5822b7f2007-05-08 00:23:16 -070031 if (fstat64(fd, &buf) < 0)
Jeff Dikef1adc052007-05-08 00:23:18 -070032 return -errno;
Jeff Dike84b3db02007-10-16 01:27:13 -070033 } else if (lstat64(path, &buf) < 0) {
Jeff Dikef1adc052007-05-08 00:23:18 -070034 return -errno;
Alberto Bertogli5822b7f2007-05-08 00:23:16 -070035 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
Jeff Dike84b3db02007-10-16 01:27:13 -070037 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) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 atime_out->tv_sec = buf.st_atime;
51 atime_out->tv_nsec = 0;
52 }
Jeff Dike84b3db02007-10-16 01:27:13 -070053 if (mtime_out != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 mtime_out->tv_sec = buf.st_mtime;
55 mtime_out->tv_nsec = 0;
56 }
Jeff Dike84b3db02007-10-16 01:27:13 -070057 if (ctime_out != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 ctime_out->tv_sec = buf.st_ctime;
59 ctime_out->tv_nsec = 0;
60 }
Jeff Dike84b3db02007-10-16 01:27:13 -070061 if (blksize_out != NULL)
62 *blksize_out = buf.st_blksize;
63 if (blocks_out != NULL)
64 *blocks_out = buf.st_blocks;
Jeff Dikef1adc052007-05-08 00:23:18 -070065 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070066}
67
68int file_type(const char *path, int *maj, int *min)
69{
70 struct stat64 buf;
71
Jeff Dike84b3db02007-10-16 01:27:13 -070072 if (lstat64(path, &buf) < 0)
Jeff Dikef1adc052007-05-08 00:23:18 -070073 return -errno;
Jeff Dike84b3db02007-10-16 01:27:13 -070074 /*
75 * We cannot pass rdev as is because glibc and the kernel disagree
76 * about its definition.
77 */
78 if (maj != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 *maj = major(buf.st_rdev);
Jeff Dike84b3db02007-10-16 01:27:13 -070080 if (min != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 *min = minor(buf.st_rdev);
82
Jeff Dike84b3db02007-10-16 01:27:13 -070083 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;
Jeff Dikef1adc052007-05-08 00:23:18 -070095 else return OS_TYPE_FILE;
Linus Torvalds1da177e2005-04-16 15:20:36 -070096}
97
98int access_file(char *path, int r, int w, int x)
99{
100 int mode = 0;
101
Jeff Dike84b3db02007-10-16 01:27:13 -0700102 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)
Jeff Dikef1adc052007-05-08 00:23:18 -0700109 return -errno;
110 else return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111}
112
113int open_file(char *path, int r, int w, int append)
114{
115 int mode = 0, fd;
116
Jeff Dike84b3db02007-10-16 01:27:13 -0700117 if (r && !w)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 mode = O_RDONLY;
Jeff Dike84b3db02007-10-16 01:27:13 -0700119 else if (!r && w)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 mode = O_WRONLY;
Jeff Dike84b3db02007-10-16 01:27:13 -0700121 else if (r && w)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 mode = O_RDWR;
123 else panic("Impossible mode in open_file");
124
Jeff Dike84b3db02007-10-16 01:27:13 -0700125 if (append)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 mode |= O_APPEND;
127 fd = open64(path, mode);
Jeff Dike84b3db02007-10-16 01:27:13 -0700128 if (fd < 0)
Jeff Dikef1adc052007-05-08 00:23:18 -0700129 return -errno;
130 else return fd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131}
132
133void *open_dir(char *path, int *err_out)
134{
135 DIR *dir;
136
137 dir = opendir(path);
138 *err_out = errno;
Jeff Dike84b3db02007-10-16 01:27:13 -0700139 if (dir == NULL)
Jeff Dikef1adc052007-05-08 00:23:18 -0700140 return NULL;
141 return dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142}
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);
Jeff Dike84b3db02007-10-16 01:27:13 -0700152 if (ent == NULL)
Jeff Dikef1adc052007-05-08 00:23:18 -0700153 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 *len_out = strlen(ent->d_name);
155 *ino_out = ent->d_ino;
156 *pos = telldir(dir);
Jeff Dikef1adc052007-05-08 00:23:18 -0700157 return ent->d_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158}
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);
Jeff Dike84b3db02007-10-16 01:27:13 -0700165 if (n < 0)
Jeff Dikef1adc052007-05-08 00:23:18 -0700166 return -errno;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 *offset += n;
Jeff Dikef1adc052007-05-08 00:23:18 -0700168 return n;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169}
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);
Jeff Dike84b3db02007-10-16 01:27:13 -0700176 if (n < 0)
Jeff Dikef1adc052007-05-08 00:23:18 -0700177 return -errno;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 *offset += n;
Jeff Dikef1adc052007-05-08 00:23:18 -0700179 return n;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180}
181
182int lseek_file(int fd, long long offset, int whence)
183{
184 int ret;
185
186 ret = lseek64(fd, offset, whence);
Jeff Dike84b3db02007-10-16 01:27:13 -0700187 if (ret < 0)
Jeff Dikef1adc052007-05-08 00:23:18 -0700188 return -errno;
189 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190}
191
Paolo 'Blaisorblade' Giarrussoa2d76bd2005-07-28 21:16:15 -0700192int 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205void 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);
Jeff Dike84b3db02007-10-16 01:27:13 -0700231 if (fd < 0)
Jeff Dikef1adc052007-05-08 00:23:18 -0700232 return -errno;
233 return fd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234}
235
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700236int set_attr(const char *file, struct hostfs_iattr *attrs, int fd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237{
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700238 struct timeval times[2];
239 struct timespec atime_ts, mtime_ts;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 int err, ma;
241
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700242 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) {
Jeff Dikef1adc052007-05-08 00:23:18 -0700247 return -errno;
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700248 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 }
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700250 if (attrs->ia_valid & HOSTFS_ATTR_UID) {
251 if (fd >= 0) {
252 if (fchown(fd, attrs->ia_uid, -1))
Jeff Dikef1adc052007-05-08 00:23:18 -0700253 return -errno;
Jeff Dike84b3db02007-10-16 01:27:13 -0700254 } else if (chown(file, attrs->ia_uid, -1)) {
Jeff Dikef1adc052007-05-08 00:23:18 -0700255 return -errno;
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700256 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 }
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700258 if (attrs->ia_valid & HOSTFS_ATTR_GID) {
259 if (fd >= 0) {
260 if (fchown(fd, -1, attrs->ia_gid))
Jeff Dikef1adc052007-05-08 00:23:18 -0700261 return -errno;
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700262 } else if (chown(file, -1, attrs->ia_gid)) {
Jeff Dikef1adc052007-05-08 00:23:18 -0700263 return -errno;
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700264 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 }
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700266 if (attrs->ia_valid & HOSTFS_ATTR_SIZE) {
267 if (fd >= 0) {
268 if (ftruncate(fd, attrs->ia_size))
Jeff Dikef1adc052007-05-08 00:23:18 -0700269 return -errno;
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700270 } else if (truncate(file, attrs->ia_size)) {
Jeff Dikef1adc052007-05-08 00:23:18 -0700271 return -errno;
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700272 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
Jeff Dike84b3db02007-10-16 01:27:13 -0700275 /*
276 * Update accessed and/or modified time, in two parts: first set
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700277 * times according to the changes to perform, and then call futimes()
Jeff Dike84b3db02007-10-16 01:27:13 -0700278 * or utimes() to apply them.
279 */
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700280 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;
Dominique Quatravauxd7b88512008-02-04 22:31:15 -0800288 times[0].tv_usec = atime_ts.tv_nsec / 1000;
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700289 times[1].tv_sec = mtime_ts.tv_sec;
Dominique Quatravauxd7b88512008-02-04 22:31:15 -0800290 times[1].tv_usec = mtime_ts.tv_nsec / 1000;
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700291
292 if (attrs->ia_valid & HOSTFS_ATTR_ATIME_SET) {
293 times[0].tv_sec = attrs->ia_atime.tv_sec;
Dominique Quatravauxd7b88512008-02-04 22:31:15 -0800294 times[0].tv_usec = attrs->ia_atime.tv_nsec / 1000;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 }
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700296 if (attrs->ia_valid & HOSTFS_ATTR_MTIME_SET) {
297 times[1].tv_sec = attrs->ia_mtime.tv_sec;
Dominique Quatravauxd7b88512008-02-04 22:31:15 -0800298 times[1].tv_usec = attrs->ia_mtime.tv_nsec / 1000;
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700299 }
300
301 if (fd >= 0) {
302 if (futimes(fd, times) != 0)
Jeff Dikef1adc052007-05-08 00:23:18 -0700303 return -errno;
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700304 } else if (utimes(file, times) != 0) {
Jeff Dikef1adc052007-05-08 00:23:18 -0700305 return -errno;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 }
307 }
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700308
Jeff Dikebaabd152007-10-16 01:27:13 -0700309 /* Note: ctime is not handled */
Jeff Dike84b3db02007-10-16 01:27:13 -0700310 if (attrs->ia_valid & (HOSTFS_ATTR_ATIME | HOSTFS_ATTR_MTIME)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL,
312 &attrs->ia_atime, &attrs->ia_mtime, NULL,
Alberto Bertogli5822b7f2007-05-08 00:23:16 -0700313 NULL, NULL, fd);
Jeff Dike84b3db02007-10-16 01:27:13 -0700314 if (err != 0)
Jeff Dikef1adc052007-05-08 00:23:18 -0700315 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 }
Jeff Dikef1adc052007-05-08 00:23:18 -0700317 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318}
319
320int make_symlink(const char *from, const char *to)
321{
322 int err;
323
324 err = symlink(to, from);
Jeff Dike84b3db02007-10-16 01:27:13 -0700325 if (err)
Jeff Dikef1adc052007-05-08 00:23:18 -0700326 return -errno;
327 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328}
329
330int unlink_file(const char *file)
331{
332 int err;
333
334 err = unlink(file);
Jeff Dike84b3db02007-10-16 01:27:13 -0700335 if (err)
Jeff Dikef1adc052007-05-08 00:23:18 -0700336 return -errno;
337 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338}
339
340int do_mkdir(const char *file, int mode)
341{
342 int err;
343
344 err = mkdir(file, mode);
Jeff Dike84b3db02007-10-16 01:27:13 -0700345 if (err)
Jeff Dikef1adc052007-05-08 00:23:18 -0700346 return -errno;
347 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348}
349
350int do_rmdir(const char *file)
351{
352 int err;
353
354 err = rmdir(file);
Jeff Dike84b3db02007-10-16 01:27:13 -0700355 if (err)
Jeff Dikef1adc052007-05-08 00:23:18 -0700356 return -errno;
357 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358}
359
Johannes Stezenbach88f6cd02007-01-29 13:19:44 -0800360int do_mknod(const char *file, int mode, unsigned int major, unsigned int minor)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361{
362 int err;
363
Johannes Stezenbach88f6cd02007-01-29 13:19:44 -0800364 err = mknod(file, mode, makedev(major, minor));
Jeff Dike84b3db02007-10-16 01:27:13 -0700365 if (err)
Jeff Dikef1adc052007-05-08 00:23:18 -0700366 return -errno;
367 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368}
369
370int link_file(const char *to, const char *from)
371{
372 int err;
373
374 err = link(to, from);
Jeff Dike84b3db02007-10-16 01:27:13 -0700375 if (err)
Jeff Dikef1adc052007-05-08 00:23:18 -0700376 return -errno;
377 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378}
379
WANG Congea7e7432008-11-19 15:36:46 -0800380int hostfs_do_readlink(char *file, char *buf, int size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381{
382 int n;
383
384 n = readlink(file, buf, size);
Jeff Dike84b3db02007-10-16 01:27:13 -0700385 if (n < 0)
Jeff Dikef1adc052007-05-08 00:23:18 -0700386 return -errno;
Jeff Dike84b3db02007-10-16 01:27:13 -0700387 if (n < size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 buf[n] = '\0';
Jeff Dikef1adc052007-05-08 00:23:18 -0700389 return n;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390}
391
392int rename_file(char *from, char *to)
393{
394 int err;
395
396 err = rename(from, to);
Jeff Dike84b3db02007-10-16 01:27:13 -0700397 if (err < 0)
Jeff Dikef1adc052007-05-08 00:23:18 -0700398 return -errno;
399 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400}
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);
Jeff Dike84b3db02007-10-16 01:27:13 -0700412 if (err < 0)
Jeff Dikef1adc052007-05-08 00:23:18 -0700413 return -errno;
414
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 *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];
Jeff Dikef1adc052007-05-08 00:23:18 -0700430 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431}