+ return rc;
+}
+
+/* Search for opt in mntlist, returning true if found.
+ */
+static int in_mntlist(char *opt, char *mntlist)
+{
+ char *ml, *mlp, *item, *ctx = NULL;
+
+ if (!(ml = strdup(mntlist))) {
+ fprintf(stderr, "%s: out of memory\n", progname);
+ exit(1);
+ }
+ mlp = ml;
+ while ((item = strtok_r(mlp, ",", &ctx))) {
+ if (!strcmp(opt, item))
+ break;
+ mlp = NULL;
+ }
+ free(ml);
+ return (item != NULL);
+}
+
+/* Issue a message on stderr for every item in wanted_mountopts that is not
+ * present in mountopts. The justwarn boolean toggles between error and
+ * warning message. Return an error count.
+ */
+int check_mountfsoptions(char *mountopts, char *wanted_mountopts,
+ int justwarn)
+{
+ char *ml, *mlp, *item, *ctx = NULL;
+ int errors = 0;
+
+ if (!(ml = strdup(wanted_mountopts))) {
+ fprintf(stderr, "%s: out of memory\n", progname);
+ exit(1);
+ }
+ mlp = ml;
+ while ((item = strtok_r(mlp, ",", &ctx))) {
+ if (!in_mntlist(item, mountopts)) {
+ fprintf(stderr, "%s: %s mount option `%s' is missing\n",
+ progname, justwarn ? "Warning: default"
+ : "Error: mandatory", item);
+ errors++;
+ }
+ mlp = NULL;
+ }
+ free(ml);
+ return errors;
+}
+
+/* Trim embedded white space, leading and trailing commas from string s.
+ */
+void trim_mountfsoptions(char *s)
+{
+ char *p;
+
+ for (p = s; *p; ) {
+ if (isspace(*p)) {
+ memmove(p, p + 1, strlen(p + 1) + 1);
+ continue;
+ }
+ p++;
+ }
+
+ while (s[0] == ',')
+ memmove(&s[0], &s[1], strlen(&s[1]) + 1);
+
+ p = s + strlen(s) - 1;
+ while (p >= s && *p == ',')
+ *p-- = '\0';
+}
+
+/* Setup a file in the first unused loop_device */
+int loop_setup(struct mkfs_opts *mop)
+{
+ char loop_base[20];
+ char l_device[64];
+ int i, ret = 0;
+
+ /* Figure out the loop device names */
+ if (!access("/dev/loop0", F_OK | R_OK) ||
+ !access("/dev/loop-control", F_OK | R_OK)) {
+ strcpy(loop_base, "/dev/loop\0");
+ } else if (!access("/dev/loop/0", F_OK | R_OK)) {
+ strcpy(loop_base, "/dev/loop/\0");
+ } else {
+ fprintf(stderr, "%s: can't access loop devices\n", progname);
+ return EACCES;
+ }
+
+ /* Find unused loop device */
+ for (i = 0; i < MAX_LOOP_DEVICES; i++) {
+ char cmd[PATH_MAX];
+ int cmdsz = sizeof(cmd);
+
+#ifdef LOOP_CTL_GET_FREE
+ ret = open("/dev/loop-control", O_RDWR);
+ if (ret < 0) {
+ fprintf(stderr, "%s: can't access loop control\n", progname);
+ return EACCES;
+ }
+ /* find or allocate a free loop device to use */
+ i = ioctl(ret, LOOP_CTL_GET_FREE);
+ if (i < 0) {
+ fprintf(stderr, "%s: access loop control error\n", progname);
+ return EACCES;
+ }
+ sprintf(l_device, "%s%d", loop_base, i);
+#else
+ sprintf(l_device, "%s%d", loop_base, i);
+ if (access(l_device, F_OK | R_OK))
+ break;
+#endif
+ snprintf(cmd, cmdsz, "losetup %s > /dev/null 2>&1", l_device);
+ ret = system(cmd);
+
+ /* losetup gets 1 (ret=256) for non-set-up device */
+ if (ret) {
+ /* Set up a loopback device to our file */
+ snprintf(cmd, cmdsz, "losetup %s %s", l_device,
+ mop->mo_device);
+ ret = run_command(cmd, cmdsz);
+ if (ret == 256)
+ /* someone else picked up this loop device
+ * behind our back */
+ continue;
+ if (ret) {
+ fprintf(stderr, "%s: error %d on losetup: %s\n",
+ progname, ret,
+ ret >= 0 ? strerror(ret) : "");
+ return ret;
+ }
+ strscpy(mop->mo_loopdev, l_device,
+ sizeof(mop->mo_loopdev));
+ return ret;
+ }
+ }
+
+ fprintf(stderr, "%s: out of loop devices!\n", progname);
+ return EMFILE;
+}
+
+int loop_cleanup(struct mkfs_opts *mop)
+{
+ char cmd[150];
+ int ret = 0;
+
+ if ((mop->mo_flags & MO_IS_LOOP) && *mop->mo_loopdev) {
+ int tries;
+
+ sprintf(cmd, "losetup -d %s", mop->mo_loopdev);
+ for (tries = 0; tries < 3; tries++) {
+ ret = run_command(cmd, sizeof(cmd));
+ if (ret == 0)
+ break;
+ sleep(1);
+ }
+ }
+
+ if (ret != 0)
+ fprintf(stderr, "cannot cleanup %s: rc = %d\n",
+ mop->mo_loopdev, ret);
+ return ret;
+}
+
+int loop_format(struct mkfs_opts *mop)
+{
+ int fd;
+
+ if (mop->mo_device_kb == 0) {
+ fatal();
+ fprintf(stderr, "loop device requires a --device-size= "
+ "param\n");
+ return EINVAL;
+ }
+
+ fd = creat(mop->mo_device, S_IRUSR|S_IWUSR);
+ if (fd < 0) {
+ fatal();
+ fprintf(stderr, "%s: Unable to create backing store: %s\n",
+ progname, strerror(errno));
+ return errno;
+ }
+
+ if (ftruncate(fd, mop->mo_device_kb * 1024) != 0) {
+ close(fd);
+ fatal();
+ fprintf(stderr, "%s: Unable to truncate backing store: %s\n",
+ progname, strerror(errno));
+ return errno;
+ }
+
+ close(fd);
+ return 0;
+}
+
+#define DLSYM(prefix, sym, func) \
+ do { \
+ char _fname[64]; \
+ snprintf(_fname, sizeof(_fname), "%s_%s", prefix, #func); \
+ sym->func = (typeof(sym->func))dlsym(sym->dl_handle, _fname); \
+ } while (0)
+
+/**
+ * Load plugin for a given mount_type from ${pkglibdir}/mount_osd_FSTYPE.so and
+ * return struct of function pointers (will be freed in unloack_backfs_module).
+ *
+ * \param[in] mount_type Mount type to load module for.
+ * \retval Value of backfs_ops struct
+ * \retval NULL if no module exists
+ */
+struct module_backfs_ops *load_backfs_module(enum ldd_mount_type mount_type)
+{
+ void *handle;
+ char *error, filename[512], fsname[512], *name;
+ struct module_backfs_ops *ops;
+
+ /* This deals with duplicate ldd_mount_types resolving to same OSD layer
+ * plugin (e.g. ext3/ldiskfs/ldiskfs2 all being ldiskfs) */
+ strlcpy(fsname, mt_type(mount_type), sizeof(fsname));
+ name = fsname + sizeof("osd-") - 1;
+
+ /* change osd- to osd_ */
+ fsname[sizeof("osd-") - 2] = '_';
+
+ snprintf(filename, sizeof(filename), PLUGIN_DIR"/mount_%s.so", fsname);
+
+ handle = dlopen(filename, RTLD_LAZY);
+
+ /* Check for $LUSTRE environment variable from test-framework.
+ * This allows using locally built modules to be used.
+ */
+ if (handle == NULL) {
+ char *dirname;
+ dirname = getenv("LUSTRE");
+ if (dirname) {
+ snprintf(filename, sizeof(filename),
+ "%s/utils/.libs/mount_%s.so",
+ dirname, fsname);
+ handle = dlopen(filename, RTLD_LAZY);
+ }
+ }
+
+ /* Do not clutter up console with missing types */
+ if (handle == NULL)
+ return NULL;
+
+ ops = malloc(sizeof(*ops));
+ if (ops == NULL) {
+ dlclose(handle);
+ return NULL;
+ }
+
+ ops->dl_handle = handle;
+ dlerror(); /* Clear any existing error */
+
+ DLSYM(name, ops, init);
+ DLSYM(name, ops, fini);
+ DLSYM(name, ops, read_ldd);
+ DLSYM(name, ops, write_ldd);
+ DLSYM(name, ops, is_lustre);
+ DLSYM(name, ops, make_lustre);
+ DLSYM(name, ops, prepare_lustre);
+ DLSYM(name, ops, tune_lustre);
+ DLSYM(name, ops, label_lustre);
+ DLSYM(name, ops, enable_quota);
+
+ error = dlerror();
+ if (error != NULL) {
+ fatal();
+ fprintf(stderr, "%s\n", error);
+ dlclose(handle);
+ free(ops);
+ return NULL;
+ }
+ return ops;
+}
+
+/**
+ * Unload plugin and free backfs_ops structure. Must be called the same number
+ * of times as load_backfs_module is.
+ */
+void unload_backfs_module(struct module_backfs_ops *ops)
+{
+ if (ops == NULL)
+ return;
+
+ dlclose(ops->dl_handle);
+ free(ops);
+}
+
+/* Return true if backfs_ops has operations for the given mount_type. */
+int backfs_mount_type_okay(enum ldd_mount_type mount_type)
+{
+ if (unlikely(mount_type >= LDD_MT_LAST || mount_type < 0)) {
+ fatal();
+ fprintf(stderr, "fs type out of range %d\n", mount_type);
+ return 0;
+ }
+ if (backfs_ops[mount_type] == NULL) {
+ fatal();
+ fprintf(stderr, "unhandled fs type %d '%s'\n",
+ mount_type, mt_str(mount_type));
+ return 0;
+ }
+ return 1;
+}
+
+/* Write the server config files */
+int osd_write_ldd(struct mkfs_opts *mop)
+{
+ struct lustre_disk_data *ldd = &mop->mo_ldd;
+ int ret;
+
+ if (backfs_mount_type_okay(ldd->ldd_mount_type))
+ ret = backfs_ops[ldd->ldd_mount_type]->write_ldd(mop);
+
+ else
+ ret = EINVAL;
+
+ return ret;
+}
+
+/* Read the server config files */
+int osd_read_ldd(char *dev, struct lustre_disk_data *ldd)
+{
+ int ret;
+
+ if (backfs_mount_type_okay(ldd->ldd_mount_type))
+ ret = backfs_ops[ldd->ldd_mount_type]->read_ldd(dev, ldd);
+
+ else
+ ret = EINVAL;
+
+ return ret;
+}
+
+/* Was this device formatted for Lustre */
+int osd_is_lustre(char *dev, unsigned *mount_type)
+{
+ int i;
+
+ vprint("checking for existing Lustre data: ");
+
+ for (i = 0; i < LDD_MT_LAST; ++i) {
+ if (backfs_ops[i] != NULL &&
+ backfs_ops[i]->is_lustre(dev, mount_type)) {
+ vprint("found\n");
+ return 1;
+ }
+ }
+
+ vprint("not found\n");
+ return 0;
+}
+
+/* Build fs according to type */
+int osd_make_lustre(struct mkfs_opts *mop)
+{
+ struct lustre_disk_data *ldd = &mop->mo_ldd;
+ int ret;
+
+ if (backfs_mount_type_okay(ldd->ldd_mount_type))
+ ret = backfs_ops[ldd->ldd_mount_type]->make_lustre(mop);
+
+ else
+ ret = EINVAL;
+
+ return ret;
+}
+
+int osd_prepare_lustre(struct mkfs_opts *mop,
+ char *default_mountopts, int default_len,
+ char *always_mountopts, int always_len)
+{
+ struct lustre_disk_data *ldd = &mop->mo_ldd;
+ int ret;
+
+ if (backfs_mount_type_okay(ldd->ldd_mount_type))
+ ret = backfs_ops[ldd->ldd_mount_type]->prepare_lustre(mop,
+ default_mountopts, default_len,
+ always_mountopts, always_len);
+
+ else
+ ret = EINVAL;
+
+ return ret;
+}
+
+int osd_tune_lustre(char *dev, struct mount_opts *mop)
+{
+ struct lustre_disk_data *ldd = &mop->mo_ldd;
+ int ret;
+
+ if (backfs_mount_type_okay(ldd->ldd_mount_type))
+ ret = backfs_ops[ldd->ldd_mount_type]->tune_lustre(dev, mop);
+
+ else
+ ret = EINVAL;
+
+ return ret;
+}
+
+int osd_label_lustre(struct mount_opts *mop)
+{
+ struct lustre_disk_data *ldd = &mop->mo_ldd;
+ int ret;
+
+ if (backfs_mount_type_okay(ldd->ldd_mount_type))
+ ret = backfs_ops[ldd->ldd_mount_type]->label_lustre(mop);
+
+ else
+ ret = EINVAL;
+
+ return ret;
+}
+
+/* Enable quota accounting */
+int osd_enable_quota(struct mkfs_opts *mop)
+{
+ struct lustre_disk_data *ldd = &mop->mo_ldd;
+ int ret;
+
+ if (backfs_mount_type_okay(ldd->ldd_mount_type))
+ ret = backfs_ops[ldd->ldd_mount_type]->enable_quota(mop);
+
+ else
+ ret = EINVAL;
+
+ return ret;
+}
+
+int osd_init(void)
+{
+ int i, ret = 0;
+
+ for (i = 0; i < LDD_MT_LAST; ++i) {
+ backfs_ops[i] = load_backfs_module(i);
+ if (backfs_ops[i] != NULL)
+ ret = backfs_ops[i]->init();
+ if (ret)
+ break;
+ }
+
+ return ret;
+}
+
+void osd_fini(void)
+{
+ int i;
+
+ for (i = 0; i < LDD_MT_LAST; ++i) {
+ if (backfs_ops[i] != NULL) {
+ backfs_ops[i]->fini();
+ unload_backfs_module(backfs_ops[i]);
+ backfs_ops[i] = NULL;
+ }
+ }
+}
+
+__u64 get_device_size(char* device)
+{
+ int ret, fd;
+ __u64 size = 0;
+
+ fd = open(device, O_RDONLY);
+ if (fd < 0) {
+ fprintf(stderr, "%s: cannot open %s: %s\n",
+ progname, device, strerror(errno));
+ return 0;
+ }
+
+#ifdef BLKGETSIZE64
+ /* size in bytes. bz5831 */
+ ret = ioctl(fd, BLKGETSIZE64, (void*)&size);
+#else
+ {
+ __u32 lsize = 0;
+ /* size in blocks */
+ ret = ioctl(fd, BLKGETSIZE, (void*)&lsize);
+ size = (__u64)lsize * 512;
+ }
+#endif
+ close(fd);
+ if (ret < 0) {
+ fprintf(stderr, "%s: size ioctl failed: %s\n",
+ progname, strerror(errno));
+ return 0;
+ }
+
+ vprint("device size = "LPU64"MB\n", size >> 20);
+ /* return value in KB */
+ return size >> 10;
+}
+
+int file_create(char *path, __u64 size)
+{
+ __u64 size_max;
+ int ret;
+ int fd;
+
+ /*
+ * Since "size" is in KB, the file offset it represents could overflow
+ * off_t.
+ */
+ size_max = (off_t)1 << (_FILE_OFFSET_BITS - 1 - 10);
+ if (size >= size_max) {
+ fprintf(stderr, "%s: "LPU64" KB: Backing store size must be "
+ "smaller than "LPU64" KB\n", progname, size, size_max);
+ return EFBIG;
+ }
+
+ ret = access(path, F_OK);
+ if (ret == 0) {
+ ret = unlink(path);
+ if (ret != 0)
+ return errno;
+ }
+
+ fd = creat(path, S_IRUSR|S_IWUSR);
+ if (fd < 0) {
+ fatal();
+ fprintf(stderr, "%s: Unable to create backing store: %s\n",
+ progname, strerror(errno));
+ return errno;
+ }
+
+ ret = ftruncate(fd, size * 1024);
+ close(fd);
+ if (ret != 0) {
+ fatal();
+ fprintf(stderr, "%s: Unable to truncate backing store: %s\n",
+ progname, strerror(errno));
+ return errno;
+ }
+
+ return 0;