2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
15 #include <sys/types.h>
17 #include <sys/syscall.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,
102 unsigned int *type_out)
111 *len_out = strlen(ent->d_name);
112 *ino_out = ent->d_ino;
113 *type_out = ent->d_type;
118 int read_file(int fd, unsigned long long *offset, char *buf, int len)
122 n = pread64(fd, buf, len, *offset);
129 int write_file(int fd, unsigned long long *offset, const char *buf, int len)
133 n = pwrite64(fd, buf, len, *offset);
140 int lseek_file(int fd, long long offset, int whence)
144 ret = lseek64(fd, offset, whence);
150 int fsync_file(int fd, int datasync)
163 int replace_file(int oldfd, int fd)
165 return dup2(oldfd, fd);
168 void close_file(void *stream)
170 close(*((int *) stream));
173 void close_dir(void *stream)
178 int file_create(char *name, int mode)
182 fd = open64(name, O_CREAT | O_RDWR, mode);
188 int set_attr(const char *file, struct hostfs_iattr *attrs, int fd)
190 struct hostfs_stat st;
191 struct timeval times[2];
194 if (attrs->ia_valid & HOSTFS_ATTR_MODE) {
196 if (fchmod(fd, attrs->ia_mode) != 0)
198 } else if (chmod(file, attrs->ia_mode) != 0) {
202 if (attrs->ia_valid & HOSTFS_ATTR_UID) {
204 if (fchown(fd, attrs->ia_uid, -1))
206 } else if (chown(file, attrs->ia_uid, -1)) {
210 if (attrs->ia_valid & HOSTFS_ATTR_GID) {
212 if (fchown(fd, -1, attrs->ia_gid))
214 } else if (chown(file, -1, attrs->ia_gid)) {
218 if (attrs->ia_valid & HOSTFS_ATTR_SIZE) {
220 if (ftruncate(fd, attrs->ia_size))
222 } else if (truncate(file, attrs->ia_size)) {
228 * Update accessed and/or modified time, in two parts: first set
229 * times according to the changes to perform, and then call futimes()
230 * or utimes() to apply them.
232 ma = (HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET);
233 if (attrs->ia_valid & ma) {
234 err = stat_file(file, &st, fd);
238 times[0].tv_sec = st.atime.tv_sec;
239 times[0].tv_usec = st.atime.tv_nsec / 1000;
240 times[1].tv_sec = st.mtime.tv_sec;
241 times[1].tv_usec = st.mtime.tv_nsec / 1000;
243 if (attrs->ia_valid & HOSTFS_ATTR_ATIME_SET) {
244 times[0].tv_sec = attrs->ia_atime.tv_sec;
245 times[0].tv_usec = attrs->ia_atime.tv_nsec / 1000;
247 if (attrs->ia_valid & HOSTFS_ATTR_MTIME_SET) {
248 times[1].tv_sec = attrs->ia_mtime.tv_sec;
249 times[1].tv_usec = attrs->ia_mtime.tv_nsec / 1000;
253 if (futimes(fd, times) != 0)
255 } else if (utimes(file, times) != 0) {
260 /* Note: ctime is not handled */
261 if (attrs->ia_valid & (HOSTFS_ATTR_ATIME | HOSTFS_ATTR_MTIME)) {
262 err = stat_file(file, &st, fd);
263 attrs->ia_atime = st.atime;
264 attrs->ia_mtime = st.mtime;
271 int make_symlink(const char *from, const char *to)
275 err = symlink(to, from);
281 int unlink_file(const char *file)
291 int do_mkdir(const char *file, int mode)
295 err = mkdir(file, mode);
301 int do_rmdir(const char *file)
311 int do_mknod(const char *file, int mode, unsigned int major, unsigned int minor)
315 err = mknod(file, mode, os_makedev(major, minor));
321 int link_file(const char *to, const char *from)
325 err = link(to, from);
331 int hostfs_do_readlink(char *file, char *buf, int size)
335 n = readlink(file, buf, size);
343 int rename_file(char *from, char *to)
347 err = rename(from, to);
353 int rename2_file(char *from, char *to, unsigned int flags)
357 #ifndef SYS_renameat2
359 # define SYS_renameat2 316
362 # define SYS_renameat2 353
367 err = syscall(SYS_renameat2, AT_FDCWD, from, AT_FDCWD, to, flags);
380 int do_statfs(char *root, long *bsize_out, long long *blocks_out,
381 long long *bfree_out, long long *bavail_out,
382 long long *files_out, long long *ffree_out,
383 void *fsid_out, int fsid_size, long *namelen_out)
388 err = statfs64(root, &buf);
392 *bsize_out = buf.f_bsize;
393 *blocks_out = buf.f_blocks;
394 *bfree_out = buf.f_bfree;
395 *bavail_out = buf.f_bavail;
396 *files_out = buf.f_files;
397 *ffree_out = buf.f_ffree;
398 memcpy(fsid_out, &buf.f_fsid,
399 sizeof(buf.f_fsid) > fsid_size ? fsid_size :
401 *namelen_out = buf.f_namelen;