static int local_mknod(FsContext *fs_ctx, V9fsPath *dir_path,
const char *name, FsCred *credp)
{
char *path;
int err = -1;
int serrno = 0;
V9fsString fullname;
char *buffer = NULL;
v9fs_string_init(&fullname);
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
path = fullname.data;
/* Determine the security model */
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
buffer = rpath(fs_ctx, path);
err = mknod(buffer, SM_LOCAL_MODE_BITS|S_IFREG, 0);
if (err == -1) {
goto out;
}
err = local_set_xattr(buffer, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
buffer = rpath(fs_ctx, path);
err = mknod(buffer, SM_LOCAL_MODE_BITS|S_IFREG, 0);
if (err == -1) {
goto out;
}
err = local_set_mapped_file_attr(fs_ctx, path, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
(fs_ctx->export_flags & V9FS_SM_NONE)) {
buffer = rpath(fs_ctx, path);
err = mknod(buffer, credp->fc_mode, credp->fc_rdev);
if (err == -1) {
goto out;
}
err = local_post_create_passthrough(fs_ctx, path, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
}
goto out;
err_end:
remove(buffer);
errno = serrno;
out:
g_free(buffer);
v9fs_string_free(&fullname);
return err;
}
static int local_chmod(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)
{
char buffer[PATH_MAX];
char *path = fs_path->data;
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
return local_set_xattr(rpath(fs_ctx, path, buffer), credp);
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
return local_set_mapped_file_attr(fs_ctx, path, credp);
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
(fs_ctx->export_flags & V9FS_SM_NONE)) {
return chmod(rpath(fs_ctx, path, buffer), credp->fc_mode);
}
return -1;
}
static int local_chmod(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)
{
char *buffer;
int ret = -1;
char *path = fs_path->data;
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
buffer = rpath(fs_ctx, path);
ret = local_set_xattr(buffer, credp);
g_free(buffer);
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
return local_set_mapped_file_attr(fs_ctx, path, credp);
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
(fs_ctx->export_flags & V9FS_SM_NONE)) {
buffer = rpath(fs_ctx, path);
ret = chmod(buffer, credp->fc_mode);
g_free(buffer);
}
return ret;
}
static int local_symlink(FsContext *fs_ctx, const char *oldpath,
V9fsPath *dir_path, const char *name, FsCred *credp)
{
int err = -1;
int serrno = 0;
char *newpath;
V9fsString fullname;
char buffer[PATH_MAX];
v9fs_string_init(&fullname);
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
newpath = fullname.data;
/* Determine the security model */
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
int fd;
ssize_t oldpath_size, write_size;
fd = open(rpath(fs_ctx, newpath, buffer),
O_CREAT|O_EXCL|O_RDWR|O_NOFOLLOW,
SM_LOCAL_MODE_BITS);
if (fd == -1) {
err = fd;
goto out;
}
/* Write the oldpath (target) to the file. */
oldpath_size = strlen(oldpath);
do {
write_size = write(fd, (void *)oldpath, oldpath_size);
} while (write_size == -1 && errno == EINTR);
if (write_size != oldpath_size) {
serrno = errno;
close(fd);
err = -1;
goto err_end;
}
close(fd);
/* Set cleint credentials in symlink's xattr */
credp->fc_mode = credp->fc_mode|S_IFLNK;
err = local_set_xattr(rpath(fs_ctx, newpath, buffer), credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
int fd;
ssize_t oldpath_size, write_size;
fd = open(rpath(fs_ctx, newpath, buffer),
O_CREAT|O_EXCL|O_RDWR|O_NOFOLLOW,
SM_LOCAL_MODE_BITS);
if (fd == -1) {
err = fd;
goto out;
}
/* Write the oldpath (target) to the file. */
oldpath_size = strlen(oldpath);
do {
write_size = write(fd, (void *)oldpath, oldpath_size);
} while (write_size == -1 && errno == EINTR);
if (write_size != oldpath_size) {
serrno = errno;
close(fd);
err = -1;
goto err_end;
}
close(fd);
/* Set cleint credentials in symlink's xattr */
credp->fc_mode = credp->fc_mode|S_IFLNK;
err = local_set_mapped_file_attr(fs_ctx, newpath, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
(fs_ctx->export_flags & V9FS_SM_NONE)) {
err = symlink(oldpath, rpath(fs_ctx, newpath, buffer));
if (err) {
goto out;
}
err = lchown(rpath(fs_ctx, newpath, buffer), credp->fc_uid,
credp->fc_gid);
if (err == -1) {
/*
* If we fail to change ownership and if we are
* using security model none. Ignore the error
*/
if ((fs_ctx->export_flags & V9FS_SEC_MASK) != V9FS_SM_NONE) {
serrno = errno;
goto err_end;
} else
err = 0;
}
}
goto out;
err_end:
remove(rpath(fs_ctx, newpath, buffer));
errno = serrno;
out:
v9fs_string_free(&fullname);
return err;
}
static int local_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name,
int flags, FsCred *credp, V9fsFidOpenState *fs)
{
char *path;
int fd = -1;
int err = -1;
int serrno = 0;
V9fsString fullname;
char buffer[PATH_MAX];
/*
* Mark all the open to not follow symlinks
*/
flags |= O_NOFOLLOW;
v9fs_string_init(&fullname);
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
path = fullname.data;
/* Determine the security model */
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
fd = open(rpath(fs_ctx, path, buffer), flags, SM_LOCAL_MODE_BITS);
if (fd == -1) {
err = fd;
goto out;
}
credp->fc_mode = credp->fc_mode|S_IFREG;
/* Set cleint credentials in xattr */
err = local_set_xattr(rpath(fs_ctx, path, buffer), credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
fd = open(rpath(fs_ctx, path, buffer), flags, SM_LOCAL_MODE_BITS);
if (fd == -1) {
err = fd;
goto out;
}
credp->fc_mode = credp->fc_mode|S_IFREG;
/* Set client credentials in .virtfs_metadata directory files */
err = local_set_mapped_file_attr(fs_ctx, path, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
(fs_ctx->export_flags & V9FS_SM_NONE)) {
fd = open(rpath(fs_ctx, path, buffer), flags, credp->fc_mode);
if (fd == -1) {
err = fd;
goto out;
}
err = local_post_create_passthrough(fs_ctx, path, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
}
err = fd;
fs->fd = fd;
goto out;
err_end:
close(fd);
remove(rpath(fs_ctx, path, buffer));
errno = serrno;
out:
v9fs_string_free(&fullname);
return err;
}