1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/utils/mkfs_lustre.c
38 * Author: Nathan Rutman <nathan@clusterfs.com>
41 /* This source file is compiled into both mkfs.lustre and tunefs.lustre */
45 #endif /* HAVE_CONFIG_H */
57 #include <sys/types.h>
59 #include <sys/mount.h>
60 #include <sys/utsname.h>
68 /* libcfs.h is not really needed here, but on SLES10/PPC, fs.h includes idr.h which
69 * requires BITS_PER_LONG to be defined */
70 #include <libcfs/libcfs.h>
71 #include <linux/fs.h> /* for BLKGETSIZE64 */
72 #include <linux/version.h>
74 #include <lustre_disk.h>
75 #include <lustre_param.h>
76 #include <lnet/lnetctl.h>
77 #include <lustre_ver.h>
78 #include "mount_utils.h"
84 #define MAX_LOOP_DEVICES 16
85 #define L_BLOCK_SIZE 4096
86 #define INDEX_UNASSIGNED 0xFFFF
87 #define MO_IS_LOOP 0x01
88 #define MO_FORCEFORMAT 0x02
90 /* used to describe the options to format the lustre disk, not persistent */
92 struct lustre_disk_data mo_ldd; /* to be written in MOUNT_DATA_FILE */
93 char mo_device[128]; /* disk device name */
94 char mo_mkfsopts[128]; /* options to the backing-store mkfs */
95 char mo_loopdev[128]; /* in case a loop dev is needed */
96 __u64 mo_device_sz; /* in KB */
104 static int print_only = 0;
105 static int failover = 0;
106 static int upgrade_to_18 = 0;
108 void usage(FILE *out)
110 fprintf(out, "%s v"LUSTRE_VERSION_STRING"\n", progname);
111 fprintf(out, "usage: %s <target types> [options] <device>\n", progname);
113 "\t<device>:block device or file (e.g /dev/sda or /tmp/ost1)\n"
115 "\t\t--ost: object storage, mutually exclusive with mdt,mgs\n"
116 "\t\t--mdt: metadata storage, mutually exclusive with ost\n"
117 "\t\t--mgs: configuration management service - one per site\n"
118 "\toptions (in order of popularity):\n"
119 "\t\t--mgsnode=<nid>[,<...>] : NID(s) of a remote mgs node\n"
120 "\t\t\trequired for all targets other than the mgs node\n"
121 "\t\t--fsname=<filesystem_name> : default is 'lustre'\n"
122 "\t\t--failnode=<nid>[,<...>] : NID(s) of a failover partner\n"
123 "\t\t--param <key>=<value> : set a permanent parameter\n"
124 "\t\t\te.g. --param sys.timeout=40\n"
125 "\t\t\t --param lov.stripesize=2M\n"
126 "\t\t--index=#N : target index (i.e. ost index within the lov)\n"
127 /* FIXME implement 1.6.x
128 "\t\t--configdev=<altdevice|file>: store configuration info\n"
129 "\t\t\tfor this device on an alternate device\n"
131 "\t\t--comment=<user comment>: arbitrary user string (%d bytes)\n"
132 "\t\t--mountfsoptions=<opts> : permanent mount options\n"
134 "\t\t--backfstype=<fstype> : backing fs type (ext3, ldiskfs)\n"
135 "\t\t--device-size=#N(KB) : device size for loop devices\n"
136 "\t\t--mkfsoptions=<opts> : format options\n"
137 "\t\t--reformat: overwrite an existing disk\n"
138 "\t\t--stripe-count-hint=#N : used for optimizing MDT inode size\n"
139 "\t\t--iam-dir: make use of IAM directory format on backfs, incompatible with ext3.\n"
141 "\t\t--erase-params : erase all old parameter settings\n"
142 "\t\t--nomgs: turn off MGS service on this MDT\n"
143 "\t\t--writeconf: erase all config logs for this fs.\n"
145 "\t\t--dryrun: just report what we would do; "
146 "don't write to disk\n"
147 "\t\t--verbose : e.g. show mkfs progress\n"
149 (int)sizeof(((struct lustre_disk_data *)0)->ldd_userdata));
153 #define vprint if (verbose > 0) printf
154 #define verrprint if (verbose >= 0) printf
156 /*================ utility functions =====================*/
158 char *strscat(char *dst, char *src, int buflen) {
160 if (strlen(dst) + strlen(src) >= buflen) {
161 fprintf(stderr, "string buffer overflow (max %d): '%s' + '%s'"
162 "\n", buflen, dst, src);
165 return strcat(dst, src);
169 char *strscpy(char *dst, char *src, int buflen) {
171 return strscat(dst, src, buflen);
175 dev_major (unsigned long long int __dev)
177 return ((__dev >> 8) & 0xfff) | ((unsigned int) (__dev >> 32) & ~0xfff);
181 dev_minor (unsigned long long int __dev)
183 return (__dev & 0xff) | ((unsigned int) (__dev >> 12) & ~0xff);
188 static int version = 0;
192 char release[4] = "";
194 fd = open("/proc/sys/kernel/osrelease", O_RDONLY);
196 fprintf(stderr, "%s: Warning: Can't resolve kernel "
197 "version, assuming 2.6\n", progname);
199 if (read(fd, release, 4) < 0) {
200 fprintf(stderr, "reading from /proc/sys/kernel"
201 "/osrelease: %s\n", strerror(errno));
207 if (strncmp(release, "2.4.", 4) == 0)
215 static int check_mtab_entry(char *spec)
220 fp = setmntent(MOUNTED, "r");
224 while ((mnt = getmntent(fp)) != NULL) {
225 if (strcmp(mnt->mnt_fsname, spec) == 0) {
227 fprintf(stderr, "%s: according to %s %s is "
228 "already mounted on %s\n",
229 progname, MOUNTED, spec, mnt->mnt_dir);
238 /*============ disk dev functions ===================*/
240 /* Setup a file in the first unused loop_device */
241 int loop_setup(struct mkfs_opts *mop)
247 /* Figure out the loop device names */
248 if (!access("/dev/loop0", F_OK | R_OK)) {
249 strcpy(loop_base, "/dev/loop\0");
250 } else if (!access("/dev/loop/0", F_OK | R_OK)) {
251 strcpy(loop_base, "/dev/loop/\0");
253 fprintf(stderr, "%s: can't access loop devices\n", progname);
257 /* Find unused loop device */
258 for (i = 0; i < MAX_LOOP_DEVICES; i++) {
260 int cmdsz = sizeof(cmd);
262 sprintf(l_device, "%s%d", loop_base, i);
263 if (access(l_device, F_OK | R_OK))
265 snprintf(cmd, cmdsz, "losetup %s > /dev/null 2>&1", l_device);
268 /* losetup gets 1 (ret=256) for non-set-up device */
270 /* Set up a loopback device to our file */
271 snprintf(cmd, cmdsz, "losetup %s %s", l_device,
273 ret = run_command(cmd, cmdsz);
275 /* someone else picked up this loop device
279 fprintf(stderr, "%s: error %d on losetup: %s\n",
280 progname, ret, strerror(ret));
283 strscpy(mop->mo_loopdev, l_device,
284 sizeof(mop->mo_loopdev));
289 fprintf(stderr, "%s: out of loop devices!\n", progname);
293 int loop_cleanup(struct mkfs_opts *mop)
297 if ((mop->mo_flags & MO_IS_LOOP) && *mop->mo_loopdev) {
298 sprintf(cmd, "losetup -d %s", mop->mo_loopdev);
299 ret = run_command(cmd, sizeof(cmd));
304 /* Determine if a device is a block device (as opposed to a file) */
305 int is_block(char* devname)
310 ret = access(devname, F_OK);
313 ret = stat(devname, &st);
315 fprintf(stderr, "%s: cannot stat %s\n", progname, devname);
318 return S_ISBLK(st.st_mode);
321 __u64 get_device_size(char* device)
326 fd = open(device, O_RDONLY);
328 fprintf(stderr, "%s: cannot open %s: %s\n",
329 progname, device, strerror(errno));
334 /* size in bytes. bz5831 */
335 ret = ioctl(fd, BLKGETSIZE64, (void*)&size);
340 ret = ioctl(fd, BLKGETSIZE, (void*)&lsize);
341 size = (__u64)lsize * 512;
346 fprintf(stderr, "%s: size ioctl failed: %s\n",
347 progname, strerror(errno));
351 vprint("device size = "LPU64"MB\n", size >> 20);
352 /* return value in KB */
356 int loop_format(struct mkfs_opts *mop)
360 if (mop->mo_device_sz == 0) {
362 fprintf(stderr, "loop device requires a --device-size= "
367 ret = creat(mop->mo_device, S_IRUSR|S_IWUSR);
370 fprintf(stderr, "%s: Unable to create backing store: %d\n",
376 ret = truncate(mop->mo_device, mop->mo_device_sz * 1024);
379 fprintf(stderr, "%s: Unable to truncate backing store: %d\n",
386 /* Display the need for the latest e2fsprogs to be installed. make_backfs
387 * indicates if the caller is make_lustre_backfs() or not. */
388 static void disp_old_e2fsprogs_msg(const char *feature, int make_backfs)
390 static int msg_displayed;
393 fprintf(stderr, "WARNING: %s does not support %s "
394 "feature.\n\n", E2FSPROGS, feature);
400 fprintf(stderr, "WARNING: The %s package currently installed on "
401 "your system does not support \"%s\" feature.\n",
403 #if !(HAVE_LDISKFSPROGS)
404 fprintf(stderr, "Please install the latest version of e2fsprogs from\n"
405 "http://downloads.lustre.org/public/tools/e2fsprogs/\n"
406 "to enable this feature.\n");
409 fprintf(stderr, "Feature will not be enabled until %s"
410 "is updated and '%s -O %s %%{device}' "
411 "is run.\n\n", E2FSPROGS, TUNE2FS, feature);
414 /* Check whether the file exists in the device */
415 static int file_in_dev(char *file_name, char *dev_name)
418 char debugfs_cmd[256];
419 unsigned int inode_num;
422 /* Construct debugfs command line. */
423 snprintf(debugfs_cmd, sizeof(debugfs_cmd),
424 "%s -c -R 'stat %s' '%s' 2>&1 | egrep '(Inode|unsupported)'",
425 DEBUGFS, file_name, dev_name);
427 fp = popen(debugfs_cmd, "r");
429 fprintf(stderr, "%s: %s\n", progname, strerror(errno));
433 if (fscanf(fp, "Inode: %u", &inode_num) == 1) { /* exist */
437 i = fread(debugfs_cmd, 1, sizeof(debugfs_cmd), fp);
440 fprintf(stderr, "%s", debugfs_cmd);
441 if (strstr(debugfs_cmd, "unsupported feature")) {
442 disp_old_e2fsprogs_msg("an unknown", 0);
451 /* Check whether the device has already been used with lustre */
452 static int is_lustre_target(struct mkfs_opts *mop)
456 vprint("checking for existing Lustre data: ");
458 if ((rc = file_in_dev(MOUNT_DATA_FILE, mop->mo_device))) {
460 (rc == 1) ? MOUNT_DATA_FILE : "extents");
461 /* in the -1 case, 'extents' means this really IS a lustre
466 if ((rc = file_in_dev(LAST_RCVD, mop->mo_device))) {
467 vprint("found %s\n", LAST_RCVD);
471 vprint("not found\n");
472 return 0; /* The device is not a lustre target. */
475 /* Check if a certain feature is supported by e2fsprogs.
476 * Firstly we try to use "debugfs supported_features" command to check if
477 * the feature is supported. If this fails we try to set this feature with
478 * mke2fs to check for its support. */
479 static int is_e2fsprogs_feature_supp(const char *feature)
483 char imgname[] = "/tmp/test-img-XXXXXX";
487 snprintf(cmd, sizeof(cmd), "%s -c -R \"supported_features %s\" 2>&1",
490 /* Using popen() instead of run_command() since debugfs does not return
491 * proper error code if command is not supported */
492 fp = popen(cmd, "r");
494 fprintf(stderr, "%s: %s\n", progname, strerror(errno));
497 ret = fread(cmd, 1, sizeof(cmd), fp);
499 if (strstr(cmd, feature) && !(strstr(cmd, "Unknown")))
503 if ((fd = mkstemp(imgname)) < 0)
506 snprintf(cmd, sizeof(cmd), "%s -F -O %s %s 100 >/dev/null 2>&1",
507 MKE2FS, feature, imgname);
508 /* run_command() displays the output of mke2fs when it fails for
509 * some feature, so use system() directly */
517 static void disp_old_kernel_msg(char *feature)
519 fprintf(stderr, "WARNING: ldiskfs filesystem does not support \"%s\" "
520 "feature.\n\n", feature);
523 static void enable_default_backfs_features(struct mkfs_opts *mop)
526 int maj_high, maj_low, min;
529 strscat(mop->mo_mkfsopts, " -O dir_index,extents", sizeof(mop->mo_mkfsopts));
531 /* Upstream e2fsprogs called our uninit_groups feature uninit_bg,
532 * check for both of them when testing e2fsprogs features. */
533 if (is_e2fsprogs_feature_supp("uninit_groups") == 0)
534 strscat(mop->mo_mkfsopts, ",uninit_groups",
535 sizeof(mop->mo_mkfsopts));
536 else if (is_e2fsprogs_feature_supp("uninit_bg") == 0)
537 strscat(mop->mo_mkfsopts, ",uninit_bg",
538 sizeof(mop->mo_mkfsopts));
540 disp_old_e2fsprogs_msg("uninit_bg", 1);
546 sscanf(uts.release, "%d.%d.%d", &maj_high, &maj_low, &min);
547 printf("%d %d %d\n", maj_high, maj_low, min);
549 /* Multiple mount protection is enabled only if failover node is
550 * specified and if kernel version is higher than 2.6.9 */
552 if (KERNEL_VERSION(maj_high, maj_low, min) >=
553 KERNEL_VERSION(2,6,9)) {
554 if (is_e2fsprogs_feature_supp("mmp") == 0)
555 strscat(mop->mo_mkfsopts, ",mmp",
556 sizeof(mop->mo_mkfsopts));
558 disp_old_e2fsprogs_msg("mmp", 1);
560 disp_old_kernel_msg("mmp");
564 /* Build fs according to type */
565 int make_lustre_backfs(struct mkfs_opts *mop)
567 char mkfs_cmd[PATH_MAX];
573 if (mop->mo_device_sz != 0) {
574 if (mop->mo_device_sz < 8096){
575 fprintf(stderr, "%s: size of filesystem must be larger "
576 "than 8MB, but is set to %lldKB\n",
577 progname, (long long)mop->mo_device_sz);
580 block_count = mop->mo_device_sz / (L_BLOCK_SIZE >> 10);
583 if ((mop->mo_ldd.ldd_mount_type == LDD_MT_EXT3) ||
584 (mop->mo_ldd.ldd_mount_type == LDD_MT_LDISKFS) ||
585 (mop->mo_ldd.ldd_mount_type == LDD_MT_LDISKFS2)) {
586 __u64 device_sz = mop->mo_device_sz;
588 /* we really need the size */
589 if (device_sz == 0) {
590 device_sz = get_device_size(mop->mo_device);
595 /* Journal size in MB */
596 if (strstr(mop->mo_mkfsopts, "-J") == NULL) {
597 /* Choose our own default journal size */
598 long journal_sz = 0, max_sz;
599 if (device_sz > 1024 * 1024) /* 1GB */
600 journal_sz = (device_sz / 102400) * 4;
601 /* cap journal size at 1GB */
602 if (journal_sz > 1024L)
605 max_sz = (102400 * L_BLOCK_SIZE) >> 20; /* 400MB */
606 if (journal_sz > max_sz)
609 sprintf(buf, " -J size=%ld", journal_sz);
610 strscat(mop->mo_mkfsopts, buf,
611 sizeof(mop->mo_mkfsopts));
615 /* Bytes_per_inode: disk size / num inodes */
616 if (strstr(mop->mo_mkfsopts, "-i") == NULL) {
617 long bytes_per_inode = 0;
619 if (IS_MDT(&mop->mo_ldd))
620 bytes_per_inode = 4096;
622 /* Allocate fewer inodes on large OST devices. Most
623 filesystems can be much more aggressive than even
625 if ((IS_OST(&mop->mo_ldd) && (device_sz > 100000000)))
626 bytes_per_inode = 16384; /* > 100 Gb device */
629 if (bytes_per_inode > 0) {
630 sprintf(buf, " -i %ld", bytes_per_inode);
631 strscat(mop->mo_mkfsopts, buf,
632 sizeof(mop->mo_mkfsopts));
636 /* Inode size (for extended attributes). The LOV EA size is
637 * 32 (EA hdr) + 32 (lov_mds_md) + stripes * 24 (lov_ost_data),
638 * and we want some margin above that for ACLs, other EAs... */
639 if (strstr(mop->mo_mkfsopts, "-I") == NULL) {
641 if (IS_MDT(&mop->mo_ldd)) {
642 if (mop->mo_stripe_count > 72)
643 inode_size = 512; /* bz 7241 */
644 /* cray stripes across all osts (>60) */
645 else if (mop->mo_stripe_count > 32)
647 else if (mop->mo_stripe_count > 10)
651 } else if (IS_OST(&mop->mo_ldd)) {
652 /* now as we store fids in EA on OST we need
653 to make inode bigger */
657 if (inode_size > 0) {
658 sprintf(buf, " -I %ld", inode_size);
659 strscat(mop->mo_mkfsopts, buf,
660 sizeof(mop->mo_mkfsopts));
665 strscat(mop->mo_mkfsopts, " -q",
666 sizeof(mop->mo_mkfsopts));
669 if (strstr(mop->mo_mkfsopts, "-O") == NULL)
670 enable_default_backfs_features(mop);
672 /* Allow reformat of full devices (as opposed to
673 partitions.) We already checked for mounted dev. */
674 strscat(mop->mo_mkfsopts, " -F", sizeof(mop->mo_mkfsopts));
676 snprintf(mkfs_cmd, sizeof(mkfs_cmd),
677 "%s -j -b %d -L %s ", MKE2FS, L_BLOCK_SIZE,
678 mop->mo_ldd.ldd_svname);
679 } else if (mop->mo_ldd.ldd_mount_type == LDD_MT_REISERFS) {
680 long journal_sz = 0; /* FIXME default journal size */
681 if (journal_sz > 0) {
682 sprintf(buf, " --journal_size %ld", journal_sz);
683 strscat(mop->mo_mkfsopts, buf,
684 sizeof(mop->mo_mkfsopts));
686 snprintf(mkfs_cmd, sizeof(mkfs_cmd), "mkreiserfs -ff ");
688 fprintf(stderr,"%s: unsupported fs type: %d (%s)\n",
689 progname, mop->mo_ldd.ldd_mount_type,
690 MT_STR(&mop->mo_ldd));
694 /* For loop device format the dev, not the filename */
695 dev = mop->mo_device;
696 if (mop->mo_flags & MO_IS_LOOP)
697 dev = mop->mo_loopdev;
699 vprint("formatting backing filesystem %s on %s\n",
700 MT_STR(&mop->mo_ldd), dev);
701 vprint("\ttarget name %s\n", mop->mo_ldd.ldd_svname);
702 vprint("\t4k blocks %d\n", block_count);
703 vprint("\toptions %s\n", mop->mo_mkfsopts);
705 /* mkfs_cmd's trailing space is important! */
706 strscat(mkfs_cmd, mop->mo_mkfsopts, sizeof(mkfs_cmd));
707 strscat(mkfs_cmd, " ", sizeof(mkfs_cmd));
708 strscat(mkfs_cmd, dev, sizeof(mkfs_cmd));
709 if (block_count != 0) {
710 sprintf(buf, " %d", block_count);
711 strscat(mkfs_cmd, buf, sizeof(mkfs_cmd));
714 vprint("mkfs_cmd = %s\n", mkfs_cmd);
715 ret = run_command(mkfs_cmd, sizeof(mkfs_cmd));
718 fprintf(stderr, "Unable to build fs %s (%d)\n", dev, ret);
723 /* ==================== Lustre config functions =============*/
725 void print_ldd(char *str, struct lustre_disk_data *ldd)
727 printf("\n %s:\n", str);
728 printf("Target: %s\n", ldd->ldd_svname);
729 if (ldd->ldd_svindex == INDEX_UNASSIGNED)
730 printf("Index: unassigned\n");
732 printf("Index: %d\n", ldd->ldd_svindex);
733 if (ldd->ldd_uuid[0])
734 printf("UUID: %s\n", (char *)ldd->ldd_uuid);
735 printf("Lustre FS: %s\n", ldd->ldd_fsname);
736 printf("Mount type: %s\n", MT_STR(ldd));
737 printf("Flags: %#x\n", ldd->ldd_flags);
738 printf(" (%s%s%s%s%s%s%s%s%s)\n",
739 IS_MDT(ldd) ? "MDT ":"",
740 IS_OST(ldd) ? "OST ":"",
741 IS_MGS(ldd) ? "MGS ":"",
742 ldd->ldd_flags & LDD_F_NEED_INDEX ? "needs_index ":"",
743 ldd->ldd_flags & LDD_F_VIRGIN ? "first_time ":"",
744 ldd->ldd_flags & LDD_F_UPDATE ? "update ":"",
745 ldd->ldd_flags & LDD_F_WRITECONF ? "writeconf ":"",
746 ldd->ldd_flags & LDD_F_IAM_DIR ? "IAM_dir_format ":"",
747 ldd->ldd_flags & LDD_F_UPGRADE14 ? "upgrade1.4 ":"");
748 printf("Persistent mount opts: %s\n", ldd->ldd_mount_opts);
749 printf("Parameters:%s\n", ldd->ldd_params);
750 if (ldd->ldd_userdata[0])
751 printf("Comment: %s\n", ldd->ldd_userdata);
755 static int touch_file(char *filename)
759 if (filename == NULL) {
763 fd = open(filename, O_CREAT | O_TRUNC, 0600);
772 /* keep it less than LL_FID_NAMELEN */
773 #define DUMMY_FILE_NAME_LEN 25
774 #define EXT3_DIRENT_SIZE DUMMY_FILE_NAME_LEN
776 /* Need to add these many entries to this directory to make HTREE dir. */
777 #define MIN_ENTRIES_REQ_FOR_HTREE ((L_BLOCK_SIZE / EXT3_DIRENT_SIZE))
779 static int add_dummy_files(char *dir)
781 char fpname[PATH_MAX];
785 for (i = 0; i < MIN_ENTRIES_REQ_FOR_HTREE; i++) {
786 snprintf(fpname, PATH_MAX, "%s/%0*d", dir,
787 DUMMY_FILE_NAME_LEN, i);
789 rc = touch_file(fpname);
790 if (rc && rc != -EEXIST) {
792 "%s: Can't create dummy file %s: %s\n",
793 progname, fpname , strerror(errno));
800 static int __l_mkdir(char * filepnm, int mode , struct mkfs_opts *mop)
804 ret = mkdir(filepnm, mode);
805 if (ret && ret != -EEXIST)
808 /* IAM mode supports ext3 directories of HTREE type only. So add dummy
809 * entries to new directory to create htree type of container for
811 if (mop->mo_ldd.ldd_flags & LDD_F_IAM_DIR)
812 return add_dummy_files(filepnm);
816 /* Write the server config files */
817 int write_local_files(struct mkfs_opts *mop)
819 char mntpt[] = "/tmp/mntXXXXXX";
826 /* Mount this device temporarily in order to write these files */
827 if (!mkdtemp(mntpt)) {
828 fprintf(stderr, "%s: Can't create temp mount point %s: %s\n",
829 progname, mntpt, strerror(errno));
833 dev = mop->mo_device;
834 if (mop->mo_flags & MO_IS_LOOP)
835 dev = mop->mo_loopdev;
837 ret = mount(dev, mntpt, MT_STR(&mop->mo_ldd), 0, NULL);
839 fprintf(stderr, "%s: Unable to mount %s: %s\n",
840 progname, dev, strerror(errno));
842 if (errno == ENODEV) {
843 fprintf(stderr, "Is the %s module available?\n",
844 MT_STR(&mop->mo_ldd));
849 /* Set up initial directories */
850 sprintf(filepnm, "%s/%s", mntpt, MOUNT_CONFIGS_DIR);
851 ret = __l_mkdir(filepnm, 0777, mop);
852 if ((ret != 0) && (errno != EEXIST)) {
853 fprintf(stderr, "%s: Can't make configs dir %s (%s)\n",
854 progname, filepnm, strerror(errno));
856 } else if (errno == EEXIST) {
860 /* Save the persistent mount data into a file. Lustre must pre-read
861 this file to get the real mount options. */
862 vprint("Writing %s\n", MOUNT_DATA_FILE);
863 sprintf(filepnm, "%s/%s", mntpt, MOUNT_DATA_FILE);
864 filep = fopen(filepnm, "w");
866 fprintf(stderr, "%s: Unable to create %s file: %s\n",
867 progname, filepnm, strerror(errno));
870 num = fwrite(&mop->mo_ldd, sizeof(mop->mo_ldd), 1, filep);
871 if (num < 1 && ferror(filep)) {
872 fprintf(stderr, "%s: Unable to write to file (%s): %s\n",
873 progname, filepnm, strerror(errno));
879 /* Check for upgrade */
880 if ((mop->mo_ldd.ldd_flags & (LDD_F_UPGRADE14 | LDD_F_SV_TYPE_MGS))
881 == (LDD_F_UPGRADE14 | LDD_F_SV_TYPE_MGS)) {
884 int cmdsz = sizeof(cmd);
885 vprint("Copying old logs\n");
887 /* Copy the old client log to fsname-client */
888 sprintf(filepnm, "%s/%s/%s-client",
889 mntpt, MOUNT_CONFIGS_DIR, mop->mo_ldd.ldd_fsname);
890 snprintf(cmd, cmdsz, "cp %s/%s/client %s", mntpt, MDT_LOGS_DIR,
892 ret = run_command(cmd, cmdsz);
894 fprintf(stderr, "%s: Can't copy 1.4 config %s/client "
895 "(%d)\n", progname, MDT_LOGS_DIR, ret);
896 fprintf(stderr, "mount -t ldiskfs %s somewhere, "
897 "find the client log for fs %s and "
898 "copy it manually into %s/%s-client, "
901 mop->mo_ldd.ldd_fsname, MOUNT_CONFIGS_DIR,
902 mop->mo_ldd.ldd_fsname);
906 /* We need to use the old mdt log because otherwise mdt won't
907 have complete lov if old clients connect before all
909 /* Copy the old mdt log to fsname-MDT0000 (get old
910 name from mdt_UUID) */
912 strscpy(filepnm, (char *)mop->mo_ldd.ldd_uuid, sizeof(filepnm));
913 term = strstr(filepnm, "_UUID");
916 snprintf(cmd, cmdsz, "cp %s/%s/%s %s/%s/%s",
917 mntpt, MDT_LOGS_DIR, filepnm,
918 mntpt, MOUNT_CONFIGS_DIR,
919 mop->mo_ldd.ldd_svname);
920 ret = run_command(cmd, cmdsz);
923 fprintf(stderr, "%s: Can't copy 1.4 config %s/%s "
924 "(%d)\n", progname, MDT_LOGS_DIR, filepnm, ret);
925 fprintf(stderr, "mount -t ext3 %s somewhere, "
926 "find the MDT log for fs %s and "
927 "copy it manually into %s/%s, "
930 mop->mo_ldd.ldd_fsname, MOUNT_CONFIGS_DIR,
931 mop->mo_ldd.ldd_svname);
945 int read_local_files(struct mkfs_opts *mop)
947 char tmpdir[] = "/tmp/dirXXXXXX";
953 int cmdsz = sizeof(cmd);
955 /* Make a temporary directory to hold Lustre data files. */
956 if (!mkdtemp(tmpdir)) {
957 fprintf(stderr, "%s: Can't create temporary directory %s: %s\n",
958 progname, tmpdir, strerror(errno));
962 dev = mop->mo_device;
964 /* TODO: it's worth observing the get_mountdata() function that is
965 in mount_utils.c for getting the mountdata out of the
968 /* Construct debugfs command line. */
969 snprintf(cmd, cmdsz, "%s -c -R 'dump /%s %s/mountdata' '%s'",
970 DEBUGFS, MOUNT_DATA_FILE, tmpdir, dev);
972 ret = run_command(cmd, cmdsz);
974 verrprint("%s: Unable to dump %s dir (%d)\n",
975 progname, MOUNT_CONFIGS_DIR, ret);
977 sprintf(filepnm, "%s/mountdata", tmpdir);
978 filep = fopen(filepnm, "r");
981 vprint("Reading %s\n", MOUNT_DATA_FILE);
982 num_read = fread(&mop->mo_ldd, sizeof(mop->mo_ldd), 1, filep);
983 if (num_read < 1 && ferror(filep)) {
984 fprintf(stderr, "%s: Unable to read from file (%s): %s\n",
985 progname, filepnm, strerror(errno));
990 /* Try to read pre-1.6 config from last_rcvd */
991 struct lr_server_data lsd;
992 verrprint("%s: Unable to read %d.%d config %s.\n",
993 progname, LUSTRE_MAJOR, LUSTRE_MINOR, filepnm);
995 verrprint("Trying 1.4 config from last_rcvd\n");
996 sprintf(filepnm, "%s/%s", tmpdir, LAST_RCVD);
998 /* Construct debugfs command line. */
999 snprintf(cmd, cmdsz, "%s -c -R 'dump /%s %s' %s",
1000 DEBUGFS, LAST_RCVD, filepnm, dev);
1002 ret = run_command(cmd, cmdsz);
1004 fprintf(stderr, "%s: Unable to dump %s file (%d)\n",
1005 progname, LAST_RCVD, ret);
1009 filep = fopen(filepnm, "r");
1011 fprintf(stderr, "%s: Unable to open %s: %s\n",
1012 progname, filepnm, strerror(errno));
1014 verrprint("Contents of %s:\n", tmpdir);
1016 snprintf(cmd, cmdsz, "ls -l %s/", tmpdir);
1017 run_command(cmd, cmdsz);
1018 verrprint("Contents of disk:\n");
1019 snprintf(cmd, cmdsz, "%s -c -R 'ls -l /' %s",
1021 run_command(cmd, cmdsz);
1025 vprint("Reading %s\n", LAST_RCVD);
1026 ret = fread(&lsd, 1, sizeof(lsd), filep);
1027 if (ret < sizeof(lsd)) {
1028 fprintf(stderr, "%s: Short read (%d of %d)\n",
1029 progname, ret, (int)sizeof(lsd));
1030 ret = ferror(filep);
1034 vprint("Feature compat=%x, incompat=%x\n",
1035 lsd.lsd_feature_compat, lsd.lsd_feature_incompat);
1037 if ((lsd.lsd_feature_compat & OBD_COMPAT_OST) ||
1038 (lsd.lsd_feature_incompat & OBD_INCOMPAT_OST)) {
1039 mop->mo_ldd.ldd_flags = LDD_F_SV_TYPE_OST;
1040 mop->mo_ldd.ldd_svindex = lsd.lsd_ost_index;
1041 } else if ((lsd.lsd_feature_compat & OBD_COMPAT_MDT) ||
1042 (lsd.lsd_feature_incompat & OBD_INCOMPAT_MDT)) {
1043 /* We must co-locate so mgs can see old logs.
1044 If user doesn't want this, they can copy the old
1045 logs manually and re-tunefs. */
1046 mop->mo_ldd.ldd_flags =
1047 LDD_F_SV_TYPE_MDT | LDD_F_SV_TYPE_MGS;
1048 mop->mo_ldd.ldd_svindex = lsd.lsd_mdt_index;
1050 /* If neither is set, we're pre-1.4.6, make a guess. */
1051 /* Construct debugfs command line. */
1052 snprintf(cmd, cmdsz, "%s -c -R 'rdump /%s %s' %s",
1053 DEBUGFS, MDT_LOGS_DIR, tmpdir, dev);
1054 run_command(cmd, cmdsz);
1056 sprintf(filepnm, "%s/%s", tmpdir, MDT_LOGS_DIR);
1057 if (lsd.lsd_ost_index > 0) {
1058 mop->mo_ldd.ldd_flags = LDD_F_SV_TYPE_OST;
1059 mop->mo_ldd.ldd_svindex = lsd.lsd_ost_index;
1061 /* If there's a LOGS dir, it's an MDT */
1062 if ((ret = access(filepnm, F_OK)) == 0) {
1063 mop->mo_ldd.ldd_flags =
1066 /* Old MDT's are always index 0
1068 mop->mo_ldd.ldd_svindex = 0;
1070 /* The index may not be correct */
1071 mop->mo_ldd.ldd_flags =
1072 LDD_F_SV_TYPE_OST | LDD_F_NEED_INDEX;
1073 verrprint("OST with unknown index\n");
1079 memcpy(mop->mo_ldd.ldd_uuid, lsd.lsd_uuid,
1080 sizeof(mop->mo_ldd.ldd_uuid));
1081 mop->mo_ldd.ldd_flags |= LDD_F_UPGRADE14;
1083 /* end COMPAT_146 */
1088 snprintf(cmd, cmdsz, "rm -rf %s", tmpdir);
1089 run_command(cmd, cmdsz);
1091 verrprint("Failed to read old data (%d)\n", ret);
1096 void set_defaults(struct mkfs_opts *mop)
1098 mop->mo_ldd.ldd_magic = LDD_MAGIC;
1099 mop->mo_ldd.ldd_config_ver = 1;
1100 mop->mo_ldd.ldd_flags = LDD_F_NEED_INDEX | LDD_F_UPDATE | LDD_F_VIRGIN;
1101 mop->mo_mgs_failnodes = 0;
1102 strcpy(mop->mo_ldd.ldd_fsname, "lustre");
1103 if (get_os_version() == 24)
1104 mop->mo_ldd.ldd_mount_type = LDD_MT_EXT3;
1106 mop->mo_ldd.ldd_mount_type = LDD_MT_LDISKFS;
1108 mop->mo_ldd.ldd_svindex = INDEX_UNASSIGNED;
1109 mop->mo_stripe_count = 1;
1112 static inline void badopt(const char *opt, char *type)
1114 fprintf(stderr, "%s: '--%s' only valid for %s\n",
1115 progname, opt, type);
1119 static int add_param(char *buf, char *key, char *val)
1121 int end = sizeof(((struct lustre_disk_data *)0)->ldd_params);
1122 int start = strlen(buf);
1126 keylen = strlen(key);
1127 if (start + 1 + keylen + strlen(val) >= end) {
1128 fprintf(stderr, "%s: params are too long-\n%s %s%s\n",
1129 progname, buf, key ? key : "", val);
1133 sprintf(buf + start, " %s%s", key ? key : "", val);
1137 /* from mount_lustre */
1138 /* Get rid of symbolic hostnames for tcp, since kernel can't do lookups */
1139 #define MAXNIDSTR 1024
1140 static char *convert_hostnames(char *s1)
1142 char *converted, *s2 = 0, *c, *end, sep;
1143 int left = MAXNIDSTR;
1146 converted = malloc(left);
1147 if (converted == NULL) {
1151 end = s1 + strlen(s1);
1153 while ((left > 0) && (s1 < end)) {
1154 s2 = strpbrk(s1, ",:");
1159 nid = libcfs_str2nid(s1);
1161 if (nid == LNET_NID_ANY) {
1162 fprintf(stderr, "%s: Can't parse NID '%s'\n", progname, s1);
1166 if (strncmp(libcfs_nid2str(nid), "127.0.0.1",
1167 strlen("127.0.0.1")) == 0) {
1168 fprintf(stderr, "%s: The NID '%s' resolves to the "
1169 "loopback address '%s'. Lustre requires a "
1170 "non-loopback address.\n",
1171 progname, s1, libcfs_nid2str(nid));
1176 c += snprintf(c, left, "%s%c", libcfs_nid2str(nid), sep);
1177 left = converted + MAXNIDSTR - c;
1183 int parse_opts(int argc, char *const argv[], struct mkfs_opts *mop,
1186 static struct option long_opt[] = {
1187 {"iam-dir", 0, 0, 'a'},
1188 {"backfstype", 1, 0, 'b'},
1189 {"stripe-count-hint", 1, 0, 'c'},
1190 {"comment", 1, 0, 'u'},
1191 {"configdev", 1, 0, 'C'},
1192 {"device-size", 1, 0, 'd'},
1193 {"dryrun", 0, 0, 'n'},
1194 {"erase-params", 0, 0, 'e'},
1195 {"failnode", 1, 0, 'f'},
1196 {"failover", 1, 0, 'f'},
1198 {"help", 0, 0, 'h'},
1199 {"index", 1, 0, 'i'},
1200 {"mkfsoptions", 1, 0, 'k'},
1201 {"mgsnode", 1, 0, 'm'},
1202 {"mgsnid", 1, 0, 'm'},
1204 {"fsname",1, 0, 'L'},
1205 {"noformat", 0, 0, 'n'},
1206 {"nomgs", 0, 0, 'N'},
1207 {"mountfsoptions", 1, 0, 'o'},
1209 {"param", 1, 0, 'p'},
1210 {"print", 0, 0, 'n'},
1211 {"quiet", 0, 0, 'q'},
1212 {"reformat", 0, 0, 'r'},
1213 {"verbose", 0, 0, 'v'},
1214 {"writeconf", 0, 0, 'w'},
1215 {"upgrade_to_18", 0, 0, 'U'},
1218 char *optstring = "b:c:C:d:ef:Ghi:k:L:m:MnNo:Op:Pqru:vw";
1222 while ((opt = getopt_long(argc, argv, optstring, long_opt, &longidx)) !=
1226 if (IS_MDT(&mop->mo_ldd))
1227 mop->mo_ldd.ldd_flags |= LDD_F_IAM_DIR;
1232 while (i < LDD_MT_LAST) {
1233 if (strcmp(optarg, mt_str(i)) == 0) {
1234 mop->mo_ldd.ldd_mount_type = i;
1242 if (IS_MDT(&mop->mo_ldd)) {
1243 int stripe_count = atol(optarg);
1244 if (stripe_count <= 0) {
1245 fprintf(stderr, "%s: bad stripe count "
1246 "%d\n", progname, stripe_count);
1249 mop->mo_stripe_count = stripe_count;
1251 badopt(long_opt[longidx].name, "MDT");
1255 case 'C': /* Configdev */
1257 printf("Configdev not implemented\n");
1260 mop->mo_device_sz = atol(optarg);
1263 mop->mo_ldd.ldd_params[0] = '\0';
1264 /* Must update the mgs logs */
1265 mop->mo_ldd.ldd_flags |= LDD_F_UPDATE;
1268 char *nids = convert_hostnames(optarg);
1271 rc = add_param(mop->mo_ldd.ldd_params, PARAM_FAILNODE,
1276 /* Must update the mgs logs */
1277 mop->mo_ldd.ldd_flags |= LDD_F_UPDATE;
1282 mop->mo_ldd.ldd_flags |= LDD_F_SV_TYPE_MGS;
1288 if (!(mop->mo_ldd.ldd_flags &
1289 (LDD_F_UPGRADE14 | LDD_F_VIRGIN |
1290 LDD_F_WRITECONF))) {
1291 fprintf(stderr, "%s: cannot change the index of"
1292 " a registered target\n", progname);
1295 if (IS_MDT(&mop->mo_ldd) || IS_OST(&mop->mo_ldd)) {
1296 mop->mo_ldd.ldd_svindex = atol(optarg);
1297 mop->mo_ldd.ldd_flags &= ~LDD_F_NEED_INDEX;
1299 badopt(long_opt[longidx].name, "MDT,OST");
1304 strscpy(mop->mo_mkfsopts, optarg,
1305 sizeof(mop->mo_mkfsopts));
1309 if (!(mop->mo_flags & MO_FORCEFORMAT) &&
1310 (!(mop->mo_ldd.ldd_flags &
1311 (LDD_F_UPGRADE14 | LDD_F_VIRGIN |
1312 LDD_F_WRITECONF)))) {
1313 fprintf(stderr, "%s: cannot change the name of"
1314 " a registered target\n", progname);
1317 if ((strlen(optarg) < 1) || (strlen(optarg) > 8)) {
1318 fprintf(stderr, "%s: filesystem name must be "
1319 "1-8 chars\n", progname);
1322 if ((tmp = strpbrk(optarg, "/:"))) {
1323 fprintf(stderr, "%s: char '%c' not allowed in "
1324 "filesystem name\n", progname, *tmp);
1327 strscpy(mop->mo_ldd.ldd_fsname, optarg,
1328 sizeof(mop->mo_ldd.ldd_fsname));
1332 char *nids = convert_hostnames(optarg);
1335 rc = add_param(mop->mo_ldd.ldd_params, PARAM_MGSNODE,
1340 mop->mo_mgs_failnodes++;
1344 mop->mo_ldd.ldd_flags |= LDD_F_SV_TYPE_MDT;
1350 mop->mo_ldd.ldd_flags &= ~LDD_F_SV_TYPE_MGS;
1353 *mountopts = optarg;
1356 mop->mo_ldd.ldd_flags |= LDD_F_SV_TYPE_OST;
1359 rc = add_param(mop->mo_ldd.ldd_params, NULL, optarg);
1362 /* Must update the mgs logs */
1363 mop->mo_ldd.ldd_flags |= LDD_F_UPDATE;
1369 mop->mo_flags |= MO_FORCEFORMAT;
1372 strscpy(mop->mo_ldd.ldd_userdata, optarg,
1373 sizeof(mop->mo_ldd.ldd_userdata));
1379 mop->mo_ldd.ldd_flags |= LDD_F_WRITECONF;
1387 fprintf(stderr, "Unknown option '%c'\n", opt);
1393 /* Last arg is device */
1394 if (optind != argc - 1) {
1396 fprintf(stderr, "Bad argument: %s\n", argv[optind]);
1400 /* single argument: <device> */
1407 /* Search for opt in mntlist, returning true if found.
1409 static int in_mntlist(char *opt, char *mntlist)
1411 char *ml, *mlp, *item, *ctx = NULL;
1413 if (!(ml = strdup(mntlist))) {
1414 fprintf(stderr, "%s: out of memory\n", progname);
1418 while ((item = strtok_r(mlp, ",", &ctx))) {
1419 if (!strcmp(opt, item))
1424 return (item != NULL);
1427 /* Issue a message on stderr for every item in wanted_mountopts that is not
1428 * present in mountopts. The justwarn boolean toggles between error and
1429 * warning message. Return an error count.
1431 static int check_mountfsoptions(char *mountopts, char *wanted_mountopts,
1434 char *ml, *mlp, *item, *ctx;
1437 if (!(ml = strdup(wanted_mountopts))) {
1438 fprintf(stderr, "%s: out of memory\n", progname);
1442 while ((item = strtok_r(mlp, ",", &ctx))) {
1443 if (!in_mntlist(item, mountopts)) {
1444 fprintf(stderr, "%s: %s mount option `%s' is missing\n",
1445 progname, justwarn ? "Warning: default"
1446 : "Error: mandatory", item);
1455 /* Trim embedded white space, leading and trailing commas from string s.
1457 static void trim_mountfsoptions(char *s)
1463 memmove(p, p + 1, strlen(p + 1) + 1);
1470 memmove(&s[0], &s[1], strlen(&s[1]) + 1);
1472 p = s + strlen(s) - 1;
1473 while (p >= s && *p == ',')
1477 int main(int argc, char *const argv[])
1479 struct mkfs_opts mop;
1480 struct lustre_disk_data *ldd;
1481 char *mountopts = NULL;
1482 char always_mountopts[512] = "";
1483 char default_mountopts[512] = "";
1486 if ((progname = strrchr(argv[0], '/')) != NULL)
1491 if ((argc < 2) || (argv[argc - 1][0] == '-')) {
1496 memset(&mop, 0, sizeof(mop));
1499 /* device is last arg */
1500 strscpy(mop.mo_device, argv[argc - 1], sizeof(mop.mo_device));
1502 /* Are we using a loop device? */
1503 ret = is_block(mop.mo_device);
1507 mop.mo_flags |= MO_IS_LOOP;
1510 /* For tunefs, we must read in the old values before parsing any
1513 /* Check whether the disk has already been formatted by mkfs.lustre */
1514 ret = is_lustre_target(&mop);
1517 fprintf(stderr, "Device %s has not been formatted with "
1518 "mkfs.lustre\n", mop.mo_device);
1523 ret = read_local_files(&mop);
1526 fprintf(stderr, "Failed to read previous Lustre data from %s "
1527 "(%d)\n", mop.mo_device, ret);
1530 if (strstr(mop.mo_ldd.ldd_params, PARAM_MGSNODE))
1531 mop.mo_mgs_failnodes++;
1534 print_ldd("Read previous values", &(mop.mo_ldd));
1537 ret = parse_opts(argc, argv, &mop, &mountopts);
1543 if (!(IS_MDT(ldd) || IS_OST(ldd) || IS_MGS(ldd))) {
1545 fprintf(stderr, "must set target type: MDT,OST,MGS\n");
1550 if (((IS_MDT(ldd) || IS_MGS(ldd))) && IS_OST(ldd)) {
1552 fprintf(stderr, "OST type is exclusive with MDT,MGS\n");
1557 if ((mop.mo_ldd.ldd_flags & (LDD_F_NEED_INDEX | LDD_F_UPGRADE14)) ==
1558 (LDD_F_NEED_INDEX | LDD_F_UPGRADE14)) {
1560 fprintf(stderr, "Can't find the target index, "
1561 "specify with --index\n");
1567 * Comment out these 2 checks temporarily, since for multi-MDSes
1568 * in single node only 1 mds node could have mgs service
1570 if (IS_MDT(ldd) && !IS_MGS(ldd) && (mop.mo_mgs_failnodes == 0)) {
1571 verrprint("No management node specified, adding MGS to this "
1573 ldd->ldd_flags |= LDD_F_SV_TYPE_MGS;
1575 if (!IS_MGS(ldd) && (mop.mo_mgs_failnodes == 0)) {
1578 fprintf(stderr, "Must specify --mgs or --mgsnode=\n");
1580 fprintf(stderr, "Must specify --mgsnode=\n");
1586 /* These are the permanent mount options (always included) */
1587 switch (ldd->ldd_mount_type) {
1589 case LDD_MT_LDISKFS:
1590 case LDD_MT_LDISKFS2: {
1591 strscat(default_mountopts, ",errors=remount-ro",
1592 sizeof(default_mountopts));
1593 if (IS_MDT(ldd) || IS_MGS(ldd))
1594 strscat(always_mountopts, ",iopen_nopriv,user_xattr",
1595 sizeof(always_mountopts));
1596 if ((get_os_version() == 24) && IS_OST(ldd))
1597 strscat(always_mountopts, ",asyncdel",
1598 sizeof(always_mountopts));
1599 /* NB: Files created while extents are enabled cannot be read
1600 if mounted with a kernel that doesn't include the Lustre ldiskfs
1603 (ldd->ldd_mount_type == LDD_MT_LDISKFS ||
1604 ldd->ldd_mount_type == LDD_MT_LDISKFS2)) {
1605 strscat(default_mountopts, ",extents,mballoc",
1606 sizeof(default_mountopts));
1611 mop.mo_flags |= MO_IS_LOOP;
1612 sprintf(always_mountopts, ",type=ext3,dev=%s",
1618 fprintf(stderr, "unknown fs type %d '%s'\n",
1619 ldd->ldd_mount_type,
1627 trim_mountfsoptions(mountopts);
1628 (void)check_mountfsoptions(mountopts, default_mountopts, 1);
1629 if (check_mountfsoptions(mountopts, always_mountopts, 0)) {
1633 sprintf(ldd->ldd_mount_opts, "%s", mountopts);
1636 if (ldd->ldd_mount_opts[0] == 0)
1637 /* use the defaults unless old opts exist */
1640 sprintf(ldd->ldd_mount_opts, "%s%s",
1641 always_mountopts, default_mountopts);
1642 trim_mountfsoptions(ldd->ldd_mount_opts);
1646 server_make_name(ldd->ldd_flags, ldd->ldd_svindex,
1647 ldd->ldd_fsname, ldd->ldd_svname);
1650 print_ldd("Permanent disk data", ldd);
1653 printf("exiting before disk write.\n");
1657 if (check_mtab_entry(mop.mo_device))
1660 /* Create the loopback file */
1661 if (mop.mo_flags & MO_IS_LOOP) {
1662 ret = access(mop.mo_device, F_OK);
1665 #ifndef TUNEFS /* mkfs.lustre */
1666 /* Reformat the loopback file */
1667 if (ret || (mop.mo_flags & MO_FORCEFORMAT))
1668 ret = loop_format(&mop);
1671 ret = loop_setup(&mop);
1674 fprintf(stderr, "Loop device setup for %s failed: %s\n",
1675 mop.mo_device, strerror(ret));
1680 #ifndef TUNEFS /* mkfs.lustre */
1681 /* Check whether the disk has already been formatted by mkfs.lustre */
1682 if (!(mop.mo_flags & MO_FORCEFORMAT)) {
1683 ret = is_lustre_target(&mop);
1686 fprintf(stderr, "Device %s was previously formatted "
1687 "for lustre. Use --reformat to reformat it, "
1688 "or tunefs.lustre to modify.\n",
1694 /* Format the backing filesystem */
1695 ret = make_lustre_backfs(&mop);
1698 fprintf(stderr, "mkfs failed %d\n", ret);
1703 /* Write our config files */
1704 ret = write_local_files(&mop);
1707 fprintf(stderr, "failed to write local files\n");
1714 /* Fix any crazy return values from system() */
1715 if (ret && ((ret & 255) == 0))
1718 verrprint("%s: exiting with %d (%s)\n",
1719 progname, ret, strerror(ret));