ia64/linux-2.6.18-xen.hg

view fs/hostfs/hostfs_user.c @ 524:7f8b544237bf

netfront: Allow netfront in domain 0.

This is useful if your physical network device is in a utility domain.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Tue Apr 15 15:18:58 2008 +0100 (2008-04-15)
parents 831230e53067
children
line source
1 /*
2 * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
6 #include <unistd.h>
7 #include <stdio.h>
8 #include <fcntl.h>
9 #include <dirent.h>
10 #include <errno.h>
11 #include <utime.h>
12 #include <string.h>
13 #include <sys/stat.h>
14 #include <sys/time.h>
15 #include <sys/vfs.h>
16 #include "hostfs.h"
17 #include "kern_util.h"
18 #include "user.h"
20 int stat_file(const char *path, unsigned long long *inode_out, int *mode_out,
21 int *nlink_out, int *uid_out, int *gid_out,
22 unsigned long long *size_out, struct timespec *atime_out,
23 struct timespec *mtime_out, struct timespec *ctime_out,
24 int *blksize_out, unsigned long long *blocks_out)
25 {
26 struct stat64 buf;
28 if(lstat64(path, &buf) < 0)
29 return(-errno);
31 if(inode_out != NULL) *inode_out = buf.st_ino;
32 if(mode_out != NULL) *mode_out = buf.st_mode;
33 if(nlink_out != NULL) *nlink_out = buf.st_nlink;
34 if(uid_out != NULL) *uid_out = buf.st_uid;
35 if(gid_out != NULL) *gid_out = buf.st_gid;
36 if(size_out != NULL) *size_out = buf.st_size;
37 if(atime_out != NULL) {
38 atime_out->tv_sec = buf.st_atime;
39 atime_out->tv_nsec = 0;
40 }
41 if(mtime_out != NULL) {
42 mtime_out->tv_sec = buf.st_mtime;
43 mtime_out->tv_nsec = 0;
44 }
45 if(ctime_out != NULL) {
46 ctime_out->tv_sec = buf.st_ctime;
47 ctime_out->tv_nsec = 0;
48 }
49 if(blksize_out != NULL) *blksize_out = buf.st_blksize;
50 if(blocks_out != NULL) *blocks_out = buf.st_blocks;
51 return(0);
52 }
54 int file_type(const char *path, int *maj, int *min)
55 {
56 struct stat64 buf;
58 if(lstat64(path, &buf) < 0)
59 return(-errno);
60 /*We cannot pass rdev as is because glibc and the kernel disagree
61 *about its definition.*/
62 if(maj != NULL)
63 *maj = major(buf.st_rdev);
64 if(min != NULL)
65 *min = minor(buf.st_rdev);
67 if(S_ISDIR(buf.st_mode)) return(OS_TYPE_DIR);
68 else if(S_ISLNK(buf.st_mode)) return(OS_TYPE_SYMLINK);
69 else if(S_ISCHR(buf.st_mode)) return(OS_TYPE_CHARDEV);
70 else if(S_ISBLK(buf.st_mode)) return(OS_TYPE_BLOCKDEV);
71 else if(S_ISFIFO(buf.st_mode))return(OS_TYPE_FIFO);
72 else if(S_ISSOCK(buf.st_mode))return(OS_TYPE_SOCK);
73 else return(OS_TYPE_FILE);
74 }
76 int access_file(char *path, int r, int w, int x)
77 {
78 int mode = 0;
80 if(r) mode = R_OK;
81 if(w) mode |= W_OK;
82 if(x) mode |= X_OK;
83 if(access(path, mode) != 0) return(-errno);
84 else return(0);
85 }
87 int open_file(char *path, int r, int w, int append)
88 {
89 int mode = 0, fd;
91 if(r && !w)
92 mode = O_RDONLY;
93 else if(!r && w)
94 mode = O_WRONLY;
95 else if(r && w)
96 mode = O_RDWR;
97 else panic("Impossible mode in open_file");
99 if(append)
100 mode |= O_APPEND;
101 fd = open64(path, mode);
102 if(fd < 0) return(-errno);
103 else return(fd);
104 }
106 void *open_dir(char *path, int *err_out)
107 {
108 DIR *dir;
110 dir = opendir(path);
111 *err_out = errno;
112 if(dir == NULL) return(NULL);
113 return(dir);
114 }
116 char *read_dir(void *stream, unsigned long long *pos,
117 unsigned long long *ino_out, int *len_out)
118 {
119 DIR *dir = stream;
120 struct dirent *ent;
122 seekdir(dir, *pos);
123 ent = readdir(dir);
124 if(ent == NULL) return(NULL);
125 *len_out = strlen(ent->d_name);
126 *ino_out = ent->d_ino;
127 *pos = telldir(dir);
128 return(ent->d_name);
129 }
131 int read_file(int fd, unsigned long long *offset, char *buf, int len)
132 {
133 int n;
135 n = pread64(fd, buf, len, *offset);
136 if(n < 0) return(-errno);
137 *offset += n;
138 return(n);
139 }
141 int write_file(int fd, unsigned long long *offset, const char *buf, int len)
142 {
143 int n;
145 n = pwrite64(fd, buf, len, *offset);
146 if(n < 0) return(-errno);
147 *offset += n;
148 return(n);
149 }
151 int lseek_file(int fd, long long offset, int whence)
152 {
153 int ret;
155 ret = lseek64(fd, offset, whence);
156 if(ret < 0)
157 return(-errno);
158 return(0);
159 }
161 int fsync_file(int fd, int datasync)
162 {
163 int ret;
164 if (datasync)
165 ret = fdatasync(fd);
166 else
167 ret = fsync(fd);
169 if (ret < 0)
170 return -errno;
171 return 0;
172 }
174 void close_file(void *stream)
175 {
176 close(*((int *) stream));
177 }
179 void close_dir(void *stream)
180 {
181 closedir(stream);
182 }
184 int file_create(char *name, int ur, int uw, int ux, int gr,
185 int gw, int gx, int or, int ow, int ox)
186 {
187 int mode, fd;
189 mode = 0;
190 mode |= ur ? S_IRUSR : 0;
191 mode |= uw ? S_IWUSR : 0;
192 mode |= ux ? S_IXUSR : 0;
193 mode |= gr ? S_IRGRP : 0;
194 mode |= gw ? S_IWGRP : 0;
195 mode |= gx ? S_IXGRP : 0;
196 mode |= or ? S_IROTH : 0;
197 mode |= ow ? S_IWOTH : 0;
198 mode |= ox ? S_IXOTH : 0;
199 fd = open64(name, O_CREAT | O_RDWR, mode);
200 if(fd < 0)
201 return(-errno);
202 return(fd);
203 }
205 int set_attr(const char *file, struct hostfs_iattr *attrs)
206 {
207 struct utimbuf buf;
208 int err, ma;
210 if(attrs->ia_valid & HOSTFS_ATTR_MODE){
211 if(chmod(file, attrs->ia_mode) != 0) return(-errno);
212 }
213 if(attrs->ia_valid & HOSTFS_ATTR_UID){
214 if(chown(file, attrs->ia_uid, -1)) return(-errno);
215 }
216 if(attrs->ia_valid & HOSTFS_ATTR_GID){
217 if(chown(file, -1, attrs->ia_gid)) return(-errno);
218 }
219 if(attrs->ia_valid & HOSTFS_ATTR_SIZE){
220 if(truncate(file, attrs->ia_size)) return(-errno);
221 }
222 ma = HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET;
223 if((attrs->ia_valid & ma) == ma){
224 buf.actime = attrs->ia_atime.tv_sec;
225 buf.modtime = attrs->ia_mtime.tv_sec;
226 if(utime(file, &buf) != 0) return(-errno);
227 }
228 else {
229 struct timespec ts;
231 if(attrs->ia_valid & HOSTFS_ATTR_ATIME_SET){
232 err = stat_file(file, NULL, NULL, NULL, NULL, NULL,
233 NULL, NULL, &ts, NULL, NULL, NULL);
234 if(err != 0)
235 return(err);
236 buf.actime = attrs->ia_atime.tv_sec;
237 buf.modtime = ts.tv_sec;
238 if(utime(file, &buf) != 0)
239 return(-errno);
240 }
241 if(attrs->ia_valid & HOSTFS_ATTR_MTIME_SET){
242 err = stat_file(file, NULL, NULL, NULL, NULL, NULL,
243 NULL, &ts, NULL, NULL, NULL, NULL);
244 if(err != 0)
245 return(err);
246 buf.actime = ts.tv_sec;
247 buf.modtime = attrs->ia_mtime.tv_sec;
248 if(utime(file, &buf) != 0)
249 return(-errno);
250 }
251 }
252 if(attrs->ia_valid & HOSTFS_ATTR_CTIME) ;
253 if(attrs->ia_valid & (HOSTFS_ATTR_ATIME | HOSTFS_ATTR_MTIME)){
254 err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL,
255 &attrs->ia_atime, &attrs->ia_mtime, NULL,
256 NULL, NULL);
257 if(err != 0) return(err);
258 }
259 return(0);
260 }
262 int make_symlink(const char *from, const char *to)
263 {
264 int err;
266 err = symlink(to, from);
267 if(err) return(-errno);
268 return(0);
269 }
271 int unlink_file(const char *file)
272 {
273 int err;
275 err = unlink(file);
276 if(err) return(-errno);
277 return(0);
278 }
280 int do_mkdir(const char *file, int mode)
281 {
282 int err;
284 err = mkdir(file, mode);
285 if(err) return(-errno);
286 return(0);
287 }
289 int do_rmdir(const char *file)
290 {
291 int err;
293 err = rmdir(file);
294 if(err) return(-errno);
295 return(0);
296 }
298 int do_mknod(const char *file, int mode, int dev)
299 {
300 int err;
302 err = mknod(file, mode, dev);
303 if(err) return(-errno);
304 return(0);
305 }
307 int link_file(const char *to, const char *from)
308 {
309 int err;
311 err = link(to, from);
312 if(err) return(-errno);
313 return(0);
314 }
316 int do_readlink(char *file, char *buf, int size)
317 {
318 int n;
320 n = readlink(file, buf, size);
321 if(n < 0)
322 return(-errno);
323 if(n < size)
324 buf[n] = '\0';
325 return(n);
326 }
328 int rename_file(char *from, char *to)
329 {
330 int err;
332 err = rename(from, to);
333 if(err < 0) return(-errno);
334 return(0);
335 }
337 int do_statfs(char *root, long *bsize_out, long long *blocks_out,
338 long long *bfree_out, long long *bavail_out,
339 long long *files_out, long long *ffree_out,
340 void *fsid_out, int fsid_size, long *namelen_out,
341 long *spare_out)
342 {
343 struct statfs64 buf;
344 int err;
346 err = statfs64(root, &buf);
347 if(err < 0) return(-errno);
348 *bsize_out = buf.f_bsize;
349 *blocks_out = buf.f_blocks;
350 *bfree_out = buf.f_bfree;
351 *bavail_out = buf.f_bavail;
352 *files_out = buf.f_files;
353 *ffree_out = buf.f_ffree;
354 memcpy(fsid_out, &buf.f_fsid,
355 sizeof(buf.f_fsid) > fsid_size ? fsid_size :
356 sizeof(buf.f_fsid));
357 *namelen_out = buf.f_namelen;
358 spare_out[0] = buf.f_spare[0];
359 spare_out[1] = buf.f_spare[1];
360 spare_out[2] = buf.f_spare[2];
361 spare_out[3] = buf.f_spare[3];
362 spare_out[4] = buf.f_spare[4];
363 return(0);
364 }
366 /*
367 * Overrides for Emacs so that we follow Linus's tabbing style.
368 * Emacs will notice this stuff at the end of the file and automatically
369 * adjust the settings for this buffer only. This must remain at the end
370 * of the file.
371 * ---------------------------------------------------------------------------
372 * Local variables:
373 * c-file-style: "linux"
374 * End:
375 */