2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
15 #include <sys/types.h>
21 static void stat64_to_hostfs(const struct stat64 *buf, struct hostfs_stat *p)
24 p->mode = buf->st_mode;
25 p->nlink = buf->st_nlink;
28 p->size = buf->st_size;
29 p->atime.tv_sec = buf->st_atime;
31 p->ctime.tv_sec = buf->st_ctime;
33 p->mtime.tv_sec = buf->st_mtime;
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);
41 int stat_file(const char *path, struct hostfs_stat *p, int fd)
46 if (fstat64(fd, &buf) < 0)
48 } else if (lstat64(path, &buf) < 0) {
51 stat64_to_hostfs(&buf, p);
55 int access_file(char *path, int r, int w, int x)
65 if (access(path, mode) != 0)
70 int open_file(char *path, int r, int w, int append)
80 else panic("Impossible mode in open_file");
84 fd = open64(path, mode);
90 void *open_dir(char *path, int *err_out)
100 char *read_dir(void *stream, unsigned long long *pos,
101 unsigned long long *ino_out, int *len_out)
110 *len_out = strlen(ent->d_name);
111 *ino_out = ent->d_ino;
116 int read_file(int fd, unsigned long long *offset, char *buf, int len)
120 n = pread64(fd, buf, len, *offset);
127 int write_file(int fd, unsigned long long *offset, const char *buf, int len)
131 n = pwrite64(fd, buf, len, *offset);
138 int lseek_file(int fd, long long offset, int whence)
142 ret = lseek64(fd, offset, whence);
148 int fsync_file(int fd, int datasync)
161 int replace_file(int oldfd, int fd)
163 return dup2(oldfd, fd);
166 void close_file(void *stream)
168 close(*((int *) stream));
171 void close_dir(void *stream)
176 int file_create(char *name, int ur, int uw, int ux, int gr,
177 int gw, int gx, int or, int ow, int ox)
182 mode |= ur ? S_IRUSR : 0;
183 mode |= uw ? S_IWUSR : 0;
184 mode |= ux ? S_IXUSR : 0;
185 mode |= gr ? S_IRGRP : 0;
186 mode |= gw ? S_IWGRP : 0;
187 mode |= gx ? S_IXGRP : 0;
188 mode |= or ? S_IROTH : 0;
189 mode |= ow ? S_IWOTH : 0;
190 mode |= ox ? S_IXOTH : 0;
191 fd = open64(name, O_CREAT | O_RDWR, mode);
197 int set_attr(const char *file, struct hostfs_iattr *attrs, int fd)
199 struct hostfs_stat st;
200 struct timeval times[2];
203 if (attrs->ia_valid & HOSTFS_ATTR_MODE) {
205 if (fchmod(fd, attrs->ia_mode) != 0)
207 } else if (chmod(file, attrs->ia_mode) != 0) {
211 if (attrs->ia_valid & HOSTFS_ATTR_UID) {
213 if (fchown(fd, attrs->ia_uid, -1))
215 } else if (chown(file, attrs->ia_uid, -1)) {
219 if (attrs->ia_valid & HOSTFS_ATTR_GID) {
221 if (fchown(fd, -1, attrs->ia_gid))
223 } else if (chown(file, -1, attrs->ia_gid)) {
227 if (attrs->ia_valid & HOSTFS_ATTR_SIZE) {
229 if (ftruncate(fd, attrs->ia_size))
231 } else if (truncate(file, attrs->ia_size)) {
237 * Update accessed and/or modified time, in two parts: first set
238 * times according to the changes to perform, and then call futimes()
239 * or utimes() to apply them.
241 ma = (HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET);
242 if (attrs->ia_valid & ma) {
243 err = stat_file(file, &st, fd);
247 times[0].tv_sec = st.atime.tv_sec;
248 times[0].tv_usec = st.atime.tv_nsec / 1000;
249 times[1].tv_sec = st.mtime.tv_sec;
250 times[1].tv_usec = st.mtime.tv_nsec / 1000;
252 if (attrs->ia_valid & HOSTFS_ATTR_ATIME_SET) {
253 times[0].tv_sec = attrs->ia_atime.tv_sec;
254 times[0].tv_usec = attrs->ia_atime.tv_nsec / 1000;
256 if (attrs->ia_valid & HOSTFS_ATTR_MTIME_SET) {
257 times[1].tv_sec = attrs->ia_mtime.tv_sec;
258 times[1].tv_usec = attrs->ia_mtime.tv_nsec / 1000;
262 if (futimes(fd, times) != 0)
264 } else if (utimes(file, times) != 0) {
269 /* Note: ctime is not handled */
270 if (attrs->ia_valid & (HOSTFS_ATTR_ATIME | HOSTFS_ATTR_MTIME)) {
271 err = stat_file(file, &st, fd);
272 attrs->ia_atime = st.atime;
273 attrs->ia_mtime = st.mtime;
280 int make_symlink(const char *from, const char *to)
284 err = symlink(to, from);
290 int unlink_file(const char *file)
300 int do_mkdir(const char *file, int mode)
304 err = mkdir(file, mode);
310 int do_rmdir(const char *file)
320 int do_mknod(const char *file, int mode, unsigned int major, unsigned int minor)
324 err = mknod(file, mode, os_makedev(major, minor));
330 int link_file(const char *to, const char *from)
334 err = link(to, from);
340 int hostfs_do_readlink(char *file, char *buf, int size)
344 n = readlink(file, buf, size);
352 int rename_file(char *from, char *to)
356 err = rename(from, to);
362 int do_statfs(char *root, long *bsize_out, long long *blocks_out,
363 long long *bfree_out, long long *bavail_out,
364 long long *files_out, long long *ffree_out,
365 void *fsid_out, int fsid_size, long *namelen_out)
370 err = statfs64(root, &buf);
374 *bsize_out = buf.f_bsize;
375 *blocks_out = buf.f_blocks;
376 *bfree_out = buf.f_bfree;
377 *bavail_out = buf.f_bavail;
378 *files_out = buf.f_files;
379 *ffree_out = buf.f_ffree;
380 memcpy(fsid_out, &buf.f_fsid,
381 sizeof(buf.f_fsid) > fsid_size ? fsid_size :
383 *namelen_out = buf.f_namelen;