4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2012, 2013, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/utils/mount_utils_ldiskfs.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 */
50 #include "mount_utils.h"
59 #include <sys/types.h>
61 #include <sys/mount.h>
62 #include <sys/utsname.h>
70 /* libcfs.h is not really needed here, but on SLES10/PPC, fs.h includes idr.h
71 * which requires BITS_PER_LONG to be defined */
72 #include <libcfs/libcfs.h>
74 #include <linux/fs.h> /* for BLKGETSIZE64 */
76 #include <linux/version.h>
78 #include <lustre_disk.h>
79 #include <lustre_param.h>
80 #include <lnet/lnetctl.h>
81 #include <lustre_ver.h>
84 #include <selinux/selinux.h>
87 #define MAX_HW_SECTORS_KB_PATH "queue/max_hw_sectors_kb"
88 #define MAX_SECTORS_KB_PATH "queue/max_sectors_kb"
89 #define SCHEDULER_PATH "queue/scheduler"
90 #define STRIPE_CACHE_SIZE "md/stripe_cache_size"
92 #define DEFAULT_SCHEDULER "deadline"
94 extern char *progname;
96 #define L_BLOCK_SIZE 4096
97 /* keep it less than LL_FID_NAMELEN */
98 #define DUMMY_FILE_NAME_LEN 25
99 #define EXT3_DIRENT_SIZE DUMMY_FILE_NAME_LEN
102 * Concatenate context of the temporary mount point iff selinux is enabled
105 void append_context_for_mount(char *mntpt, struct mkfs_opts *mop)
107 security_context_t fcontext;
109 if (getfilecon(mntpt, &fcontext) < 0) {
110 /* Continuing with default behaviour */
111 fprintf(stderr, "%s: Get file context failed : %s\n",
112 progname, strerror(errno));
116 if (fcontext != NULL) {
117 strcat(mop->mo_ldd.ldd_mount_opts, ",context=");
118 strcat(mop->mo_ldd.ldd_mount_opts, fcontext);
124 /* Write the server config files */
125 int ldiskfs_write_ldd(struct mkfs_opts *mop)
127 char mntpt[] = "/tmp/mntXXXXXX";
134 /* Mount this device temporarily in order to write these files */
135 if (!mkdtemp(mntpt)) {
136 fprintf(stderr, "%s: Can't create temp mount point %s: %s\n",
137 progname, mntpt, strerror(errno));
142 * Append file context to mount options if SE Linux is enabled
145 if (is_selinux_enabled() > 0)
146 append_context_for_mount(mntpt, mop);
149 dev = mop->mo_device;
150 if (mop->mo_flags & MO_IS_LOOP)
151 dev = mop->mo_loopdev;
153 ret = mount(dev, mntpt, MT_STR(&mop->mo_ldd), 0,
154 mop->mo_ldd.ldd_mount_opts);
156 fprintf(stderr, "%s: Unable to mount %s: %s\n",
157 progname, dev, strerror(errno));
159 if (errno == ENODEV) {
160 fprintf(stderr, "Is the %s module available?\n",
161 MT_STR(&mop->mo_ldd));
166 /* Set up initial directories */
167 sprintf(filepnm, "%s/%s", mntpt, MOUNT_CONFIGS_DIR);
168 ret = mkdir(filepnm, 0777);
169 if ((ret != 0) && (errno != EEXIST)) {
170 fprintf(stderr, "%s: Can't make configs dir %s (%s)\n",
171 progname, filepnm, strerror(errno));
173 } else if (errno == EEXIST) {
177 /* Save the persistent mount data into a file. Lustre must pre-read
178 this file to get the real mount options. */
179 vprint("Writing %s\n", MOUNT_DATA_FILE);
180 sprintf(filepnm, "%s/%s", mntpt, MOUNT_DATA_FILE);
181 filep = fopen(filepnm, "w");
183 fprintf(stderr, "%s: Unable to create %s file: %s\n",
184 progname, filepnm, strerror(errno));
187 num = fwrite(&mop->mo_ldd, sizeof(mop->mo_ldd), 1, filep);
188 if (num < 1 && ferror(filep)) {
189 fprintf(stderr, "%s: Unable to write to file (%s): %s\n",
190 progname, filepnm, strerror(errno));
203 static int readcmd(char *cmd, char *buf, int len)
208 fp = popen(cmd, "r");
212 red = fread(buf, 1, len, fp);
215 /* strip trailing newline */
216 if (buf[red - 1] == '\n')
219 return (red == 0) ? -ENOENT : 0;
222 int ldiskfs_read_ldd(char *dev, struct lustre_disk_data *mo_ldd)
224 char tmpdir[] = "/tmp/dirXXXXXX";
229 int cmdsz = sizeof(cmd);
231 /* Make a temporary directory to hold Lustre data files. */
232 if (!mkdtemp(tmpdir)) {
233 fprintf(stderr, "%s: Can't create temporary directory %s: %s\n",
234 progname, tmpdir, strerror(errno));
238 /* TODO: it's worth observing the get_mountdata() function that is
239 in mount_utils.c for getting the mountdata out of the
242 /* Construct debugfs command line. */
243 snprintf(cmd, cmdsz, "%s -c -R 'dump /%s %s/mountdata' '%s'",
244 DEBUGFS, MOUNT_DATA_FILE, tmpdir, dev);
246 ret = run_command(cmd, cmdsz);
248 verrprint("%s: Unable to dump %s dir (%d)\n",
249 progname, MOUNT_CONFIGS_DIR, ret);
251 sprintf(filepnm, "%s/mountdata", tmpdir);
252 filep = fopen(filepnm, "r");
255 vprint("Reading %s\n", MOUNT_DATA_FILE);
256 num_read = fread(mo_ldd, sizeof(*mo_ldd), 1, filep);
257 if (num_read < 1 && ferror(filep)) {
258 fprintf(stderr, "%s: Unable to read from file %s: %s\n",
259 progname, filepnm, strerror(errno));
264 snprintf(cmd, cmdsz, "rm -rf %s", tmpdir);
265 run_command(cmd, cmdsz);
267 verrprint("Failed to read old data (%d)\n", ret);
269 /* As long as we at least have the label, we're good to go */
270 snprintf(cmd, sizeof(cmd), E2LABEL" %s", dev);
271 ret = readcmd(cmd, mo_ldd->ldd_svname, sizeof(mo_ldd->ldd_svname) - 1);
277 /* Display the need for the latest e2fsprogs to be installed. make_backfs
278 * indicates if the caller is make_lustre_backfs() or not. */
279 void disp_old_e2fsprogs_msg(const char *feature, int make_backfs)
281 static int msg_displayed;
284 fprintf(stderr, "WARNING: %s does not support %s "
285 "feature.\n\n", E2FSPROGS, feature);
291 fprintf(stderr, "WARNING: The %s package currently installed on "
292 "your system does not support \"%s\" feature.\n",
294 #if !(HAVE_LDISKFSPROGS)
295 fprintf(stderr, "Please install the latest version of e2fsprogs from\n"
296 "http://downloads.whamcloud.com/public/e2fsprogs/latest/\n"
297 "to enable this feature.\n");
300 fprintf(stderr, "Feature will not be enabled until %s"
301 "is updated and '%s -O %s %%{device}' "
302 "is run.\n\n", E2FSPROGS, TUNE2FS, feature);
305 /* Check whether the file exists in the device */
306 static int file_in_dev(char *file_name, char *dev_name)
309 char debugfs_cmd[256];
310 unsigned int inode_num;
313 /* Construct debugfs command line. */
314 snprintf(debugfs_cmd, sizeof(debugfs_cmd),
315 "%s -c -R 'stat %s' '%s' 2>&1 | egrep '(Inode|unsupported)'",
316 DEBUGFS, file_name, dev_name);
318 fp = popen(debugfs_cmd, "r");
320 fprintf(stderr, "%s: %s\n", progname, strerror(errno));
324 if (fscanf(fp, "Inode: %u", &inode_num) == 1) { /* exist */
328 i = fread(debugfs_cmd, 1, sizeof(debugfs_cmd) - 1, fp);
331 fprintf(stderr, "%s", debugfs_cmd);
332 if (strstr(debugfs_cmd, "unsupported feature")) {
333 disp_old_e2fsprogs_msg("an unknown", 0);
342 /* Check whether the device has already been used with lustre */
343 int ldiskfs_is_lustre(char *dev, unsigned *mount_type)
347 ret = file_in_dev(MOUNT_DATA_FILE, dev);
349 /* in the -1 case, 'extents' means IS a lustre target */
350 *mount_type = LDD_MT_LDISKFS;
354 ret = file_in_dev(LAST_RCVD, dev);
356 *mount_type = LDD_MT_LDISKFS;
363 /* Check if a certain feature is supported by e2fsprogs.
364 * Firstly we try to use "debugfs supported_features" command to check if
365 * the feature is supported. If this fails we try to set this feature with
366 * mke2fs to check for its support. */
367 static int is_e2fsprogs_feature_supp(const char *feature)
369 static char supp_features[4096] = "";
372 char imgname[] = "/tmp/test-img-XXXXXX";
376 if (supp_features[0] == '\0') {
377 snprintf(cmd, sizeof(cmd), "%s -c -R supported_features 2>&1",
380 /* Using popen() instead of run_command() since debugfs does
381 * not return proper error code if command is not supported */
382 fp = popen(cmd, "r");
384 fprintf(stderr, "%s: %s\n", progname, strerror(errno));
387 ret = fread(supp_features, 1, sizeof(supp_features) - 1, fp);
388 supp_features[ret] = '\0';
391 if (ret > 0 && strstr(supp_features,
392 strncmp(feature, "-O ", 3) ? feature : feature+3))
395 if ((fd = mkstemp(imgname)) < 0)
400 snprintf(cmd, sizeof(cmd), "%s -F %s %s 100 >/dev/null 2>&1",
401 MKE2FS, feature, imgname);
402 /* run_command() displays the output of mke2fs when it fails for
403 * some feature, so use system() directly */
412 * append_unique: append @key or @key=@val pair to @buf only if @key does not
414 * @buf: buffer to hold @key or @key=@val
415 * @prefix: prefix string before @key
417 * @val: value string if it's a @key=@val pair
419 static void append_unique(char *buf, char *prefix, char *key, char *val,
428 anchor = end = strstr(buf, key);
429 /* try to find exact match string in @buf */
430 while (end && *end != '\0' && *end != ',' && *end != ' ' && *end != '=')
433 if (anchor == NULL || strlen(key) != len ||
434 strncmp(anchor, key, len) != 0) {
436 strscat(buf, prefix, maxbuflen);
438 strscat(buf, key, maxbuflen);
440 strscat(buf, "=", maxbuflen);
441 strscat(buf, val, maxbuflen);
446 static int enable_default_ext4_features(struct mkfs_opts *mop, char *anchor,
447 size_t maxbuflen, int user_spec)
449 if (IS_OST(&mop->mo_ldd)) {
450 append_unique(anchor, user_spec ? "," : " -O ",
451 "extents", NULL, sizeof(mop->mo_mkfsopts));
452 append_unique(anchor, ",", "uninit_bg", NULL, maxbuflen);
453 } else if (IS_MDT(&mop->mo_ldd)) {
454 append_unique(anchor, user_spec ? "," : " -O ",
455 "dirdata", NULL, maxbuflen);
456 append_unique(anchor, ",", "uninit_bg", NULL, maxbuflen);
457 append_unique(anchor, ",", "^extents", NULL, maxbuflen);
459 append_unique(anchor, user_spec ? "," : " -O ",
460 "uninit_bg", NULL, maxbuflen);
463 /* Multiple mount protection enabled only if failover node specified */
464 if (mop->mo_flags & MO_FAILOVER) {
465 if (is_e2fsprogs_feature_supp("-O mmp") == 0)
466 append_unique(anchor, ",", "mmp", NULL, maxbuflen);
468 disp_old_e2fsprogs_msg("mmp", 1);
471 /* Allow more than 65000 subdirectories */
472 if (is_e2fsprogs_feature_supp("-O dir_nlink") == 0)
473 append_unique(anchor, ",", "dir_nlink", NULL, maxbuflen);
475 /* The following options are only valid for ext4-based ldiskfs.
476 * If --backfstype=ext3 is specified, do not enable them. */
477 if (mop->mo_ldd.ldd_mount_type == LDD_MT_EXT3)
480 /* Enable quota by default */
481 if (is_e2fsprogs_feature_supp("-O quota") == 0) {
482 append_unique(anchor, ",", "quota", NULL, maxbuflen);
485 fprintf(stderr, "\"-O quota\" must be supported by "
486 "e2fsprogs, please upgrade your e2fsprogs.\n");
490 /* Allow files larger than 2TB. Also needs LU-16, but not harmful. */
491 if (is_e2fsprogs_feature_supp("-O huge_file") == 0)
492 append_unique(anchor, ",", "huge_file", NULL, maxbuflen);
494 /* Enable large block addresses if the LUN is over 2^32 blocks. */
495 if (mop->mo_device_sz / (L_BLOCK_SIZE >> 10) >= 0x100002000ULL &&
496 is_e2fsprogs_feature_supp("-O 64bit") == 0)
497 append_unique(anchor, ",", "64bit", NULL, maxbuflen);
499 /* Cluster inode/block bitmaps and inode table for more efficient IO.
500 * Align the flex groups on a 1MB boundary for better performance. */
501 /* This -O feature needs to go last, since it adds the "-G" option. */
502 if (is_e2fsprogs_feature_supp("-O flex_bg") == 0) {
505 append_unique(anchor, ",", "flex_bg", NULL, maxbuflen);
507 if (IS_OST(&mop->mo_ldd)) {
508 snprintf(tmp_buf, sizeof(tmp_buf), " -G %u",
509 (1 << 20) / L_BLOCK_SIZE);
510 strscat(anchor, tmp_buf, maxbuflen);
513 /* Don't add any more "-O" options here, see last comment above */
518 * moveopts_to_end: find the option string, move remaining strings to
519 * where option string starts, and append the option
521 * @start: where the option string starts before the move
522 * RETURN: where the option string starts after the move
524 static char *moveopts_to_end(char *start)
529 /* skip whitespace before options */
534 /* find end of option characters */
535 while (*end != ' ' && *end != '\0')
539 strncpy(save, start, end - start);
540 save[end - start] = '\0';
542 /* move remaining options up front */
544 memmove(start, end, strlen(end));
545 *(start + strlen(end)) = '\0';
547 /* append the specified options */
548 if (*(start + strlen(start) - 1) != ' ')
550 idx = start + strlen(start);
556 /* Build fs according to type */
557 int ldiskfs_make_lustre(struct mkfs_opts *mop)
559 __u64 device_sz = mop->mo_device_sz, block_count = 0;
560 char mkfs_cmd[PATH_MAX];
564 int ret = 0, ext_opts = 0;
567 if (!(mop->mo_flags & MO_IS_LOOP)) {
568 mop->mo_device_sz = get_device_size(mop->mo_device);
570 if (mop->mo_device_sz == 0)
573 /* Compare to real size */
574 if (device_sz == 0 || device_sz > mop->mo_device_sz)
575 device_sz = mop->mo_device_sz;
577 mop->mo_device_sz = device_sz;
580 if (mop->mo_device_sz != 0) {
581 if (mop->mo_device_sz < 8096){
582 fprintf(stderr, "%s: size of filesystem must be larger "
583 "than 8MB, but is set to %lldKB\n",
584 progname, (long long)mop->mo_device_sz);
587 block_count = mop->mo_device_sz / (L_BLOCK_SIZE >> 10);
588 /* If the LUN size is just over 2^32 blocks, limit the
589 * filesystem size to 2^32-1 blocks to avoid problems with
590 * ldiskfs/mkfs not handling this size. Bug 22906 */
591 if (block_count > 0xffffffffULL && block_count < 0x100002000ULL)
592 block_count = 0xffffffffULL;
595 if ((mop->mo_ldd.ldd_mount_type == LDD_MT_EXT3) ||
596 (mop->mo_ldd.ldd_mount_type == LDD_MT_LDISKFS) ||
597 (mop->mo_ldd.ldd_mount_type == LDD_MT_LDISKFS2)) {
600 /* Journal size in MB */
601 if (strstr(mop->mo_mkfsopts, "-J") == NULL) {
602 /* Choose our own default journal size */
603 long journal_sz = 0, max_sz;
604 if (device_sz > 1024 * 1024) /* 1GB */
605 journal_sz = (device_sz / 102400) * 4;
606 /* cap journal size at 1GB */
607 if (journal_sz > 1024L)
610 max_sz = (102400 * L_BLOCK_SIZE) >> 20; /* 400MB */
611 if (journal_sz > max_sz)
614 sprintf(buf, " -J size=%ld", journal_sz);
615 strscat(mop->mo_mkfsopts, buf,
616 sizeof(mop->mo_mkfsopts));
620 /* Inode size (for extended attributes). The LOV EA size is
621 * 32 (EA hdr) + 32 (lov_mds_md) + stripes * 24 (lov_ost_data),
622 * and we want some margin above that for ACLs, other EAs... */
623 if (strstr(mop->mo_mkfsopts, "-I") == NULL) {
624 if (IS_MDT(&mop->mo_ldd)) {
625 if (mop->mo_stripe_count > 72)
626 inode_size = 512; /* bz 7241 */
627 /* see also "-i" below for EA blocks */
628 else if (mop->mo_stripe_count > 32)
630 else if (mop->mo_stripe_count > 10)
634 } else if (IS_OST(&mop->mo_ldd)) {
635 /* We store MDS FID and OST objid in EA on OST
636 * we need to make inode bigger as well. */
640 if (inode_size > 0) {
641 sprintf(buf, " -I %ld", inode_size);
642 strscat(mop->mo_mkfsopts, buf,
643 sizeof(mop->mo_mkfsopts));
647 /* Bytes_per_inode: disk size / num inodes */
648 if (strstr(mop->mo_mkfsopts, "-i") == NULL &&
649 strstr(mop->mo_mkfsopts, "-N") == NULL) {
650 long bytes_per_inode = 0;
652 /* Allocate more inodes on MDT devices. There is
653 * no data stored on the MDT, and very little extra
654 * metadata beyond the inode. It could go down as
655 * low as 1024 bytes, but this is conservative.
656 * Account for external EA blocks for wide striping. */
657 if (IS_MDT(&mop->mo_ldd)) {
658 bytes_per_inode = inode_size + 1536;
660 if (mop->mo_stripe_count > 72) {
661 int extra = mop->mo_stripe_count * 24;
662 extra = ((extra - 1) | 4095) + 1;
663 bytes_per_inode += extra;
667 /* Allocate fewer inodes on large OST devices. Most
668 * filesystems can be much more aggressive than even
669 * this, but it is impossible to know in advance. */
670 if (IS_OST(&mop->mo_ldd)) {
671 /* OST > 16TB assume average file size 1MB */
672 if (device_sz > (16ULL << 30))
673 bytes_per_inode = 1024 * 1024;
674 /* OST > 4TB assume average file size 512kB */
675 else if (device_sz > (4ULL << 30))
676 bytes_per_inode = 512 * 1024;
677 /* OST > 1TB assume average file size 256kB */
678 else if (device_sz > (1ULL << 30))
679 bytes_per_inode = 256 * 1024;
680 /* OST > 10GB assume average file size 64kB,
681 * plus a bit so that inodes will fit into a
682 * 256x flex_bg without overflowing */
683 else if (device_sz > (10ULL << 20))
684 bytes_per_inode = 69905;
687 if (bytes_per_inode > 0) {
688 sprintf(buf, " -i %ld", bytes_per_inode);
689 strscat(mop->mo_mkfsopts, buf,
690 sizeof(mop->mo_mkfsopts));
695 strscat(mop->mo_mkfsopts, " -q",
696 sizeof(mop->mo_mkfsopts));
699 /* start handle -O mkfs options */
700 if ((start = strstr(mop->mo_mkfsopts, "-O")) != NULL) {
701 if (strstr(start + 2, "-O") != NULL) {
703 "%s: don't specify multiple -O options\n",
707 start = moveopts_to_end(start);
708 maxbuflen = sizeof(mop->mo_mkfsopts) -
709 (start - mop->mo_mkfsopts) - strlen(start);
710 ret = enable_default_ext4_features(mop, start, maxbuflen, 1);
712 start = mop->mo_mkfsopts + strlen(mop->mo_mkfsopts),
713 maxbuflen = sizeof(mop->mo_mkfsopts) -
714 strlen(mop->mo_mkfsopts);
715 ret = enable_default_ext4_features(mop, start, maxbuflen, 0);
719 /* end handle -O mkfs options */
721 /* start handle -E mkfs options */
722 if ((start = strstr(mop->mo_mkfsopts, "-E")) != NULL) {
723 if (strstr(start + 2, "-E") != NULL) {
725 "%s: don't specify multiple -E options\n",
729 start = moveopts_to_end(start);
730 maxbuflen = sizeof(mop->mo_mkfsopts) -
731 (start - mop->mo_mkfsopts) - strlen(start);
734 start = mop->mo_mkfsopts + strlen(mop->mo_mkfsopts);
735 maxbuflen = sizeof(mop->mo_mkfsopts) -
736 strlen(mop->mo_mkfsopts);
739 /* In order to align the filesystem metadata on 1MB boundaries,
740 * give a resize value that will reserve a power-of-two group
741 * descriptor blocks, but leave one block for the superblock.
742 * Only useful for filesystems with < 2^32 blocks due to resize
744 if (IS_OST(&mop->mo_ldd) && mop->mo_device_sz > 100 * 1024 &&
745 mop->mo_device_sz * 1024 / L_BLOCK_SIZE <= 0xffffffffULL) {
746 unsigned group_blocks = L_BLOCK_SIZE * 8;
747 unsigned desc_per_block = L_BLOCK_SIZE / 32;
748 unsigned resize_blks;
750 resize_blks = (1ULL<<32) - desc_per_block*group_blocks;
751 snprintf(buf, sizeof(buf), "%u", resize_blks);
752 append_unique(start, ext_opts ? "," : " -E ",
753 "resize", buf, maxbuflen);
757 /* Avoid zeroing out the full journal - speeds up mkfs */
758 if (is_e2fsprogs_feature_supp("-E lazy_journal_init") == 0)
759 append_unique(start, ext_opts ? "," : " -E ",
760 "lazy_journal_init", NULL, maxbuflen);
761 /* end handle -E mkfs options */
763 /* Allow reformat of full devices (as opposed to
764 partitions.) We already checked for mounted dev. */
765 strscat(mop->mo_mkfsopts, " -F", sizeof(mop->mo_mkfsopts));
767 snprintf(mkfs_cmd, sizeof(mkfs_cmd),
768 "%s -j -b %d -L %s ", MKE2FS, L_BLOCK_SIZE,
769 mop->mo_ldd.ldd_svname);
771 fprintf(stderr,"%s: unsupported fs type: %d (%s)\n",
772 progname, mop->mo_ldd.ldd_mount_type,
773 MT_STR(&mop->mo_ldd));
777 /* For loop device format the dev, not the filename */
778 dev = mop->mo_device;
779 if (mop->mo_flags & MO_IS_LOOP)
780 dev = mop->mo_loopdev;
782 vprint("formatting backing filesystem %s on %s\n",
783 MT_STR(&mop->mo_ldd), dev);
784 vprint("\ttarget name %s\n", mop->mo_ldd.ldd_svname);
785 vprint("\t4k blocks "LPU64"\n", block_count);
786 vprint("\toptions %s\n", mop->mo_mkfsopts);
788 /* mkfs_cmd's trailing space is important! */
789 strscat(mkfs_cmd, mop->mo_mkfsopts, sizeof(mkfs_cmd));
790 strscat(mkfs_cmd, " ", sizeof(mkfs_cmd));
791 strscat(mkfs_cmd, dev, sizeof(mkfs_cmd));
792 if (block_count != 0) {
793 sprintf(buf, " "LPU64, block_count);
794 strscat(mkfs_cmd, buf, sizeof(mkfs_cmd));
797 vprint("mkfs_cmd = %s\n", mkfs_cmd);
798 ret = run_command(mkfs_cmd, sizeof(mkfs_cmd));
801 fprintf(stderr, "Unable to build fs %s (%d)\n", dev, ret);
806 int ldiskfs_prepare_lustre(struct mkfs_opts *mop,
807 char *default_mountopts, int default_len,
808 char *always_mountopts, int always_len)
810 struct lustre_disk_data *ldd = &mop->mo_ldd;
813 /* Set MO_IS_LOOP to indicate a loopback device is needed */
814 ret = is_block(mop->mo_device);
817 } else if (ret == 0) {
818 mop->mo_flags |= MO_IS_LOOP;
821 strscat(default_mountopts, ",errors=remount-ro", default_len);
822 if (IS_MDT(ldd) || IS_MGS(ldd))
823 strscat(always_mountopts, ",user_xattr", always_len);
828 int read_file(const char *path, char *buf, int size)
832 fd = fopen(path, "r");
836 /* should not ignore fgets(3)'s return value */
837 if (!fgets(buf, size, fd)) {
838 fprintf(stderr, "reading from %s: %s", path, strerror(errno));
846 int write_file(const char *path, const char *buf)
850 fd = fopen(path, "w");
859 int set_blockdev_scheduler(const char *path, const char *scheduler)
861 char buf[PATH_MAX], *c;
864 /* Before setting the scheduler, we need to check to see if it's
865 * already set to "noop". If it is, we don't want to override
866 * that setting. If it's set to anything other than "noop", set
867 * the scheduler to what has been passed in. */
869 rc = read_file(path, buf, sizeof(buf));
872 fprintf(stderr, "%s: cannot open '%s': %s\n",
873 progname, path, strerror(errno));
877 /* The expected format of buf: noop anticipatory deadline [cfq] */
878 c = strchr(buf, '[');
880 /* If c is NULL, the format is not what we expect. Play it safe
884 fprintf(stderr, "%s: cannot parse scheduler "
885 "options for '%s'\n", progname, path);
889 if (strncmp(c+1, "noop", 4) == 0)
892 rc = write_file(path, scheduler);
895 fprintf(stderr, "%s: cannot set scheduler on "
896 "'%s': %s\n", progname, path,
904 /* This is to tune the kernel for good SCSI performance.
905 * For that we set the value of /sys/block/{dev}/queue/max_sectors_kb
906 * to the value of /sys/block/{dev}/queue/max_hw_sectors_kb */
907 int set_blockdev_tunables(char *source, struct mount_opts *mop, int fan_out)
909 glob_t glob_info = { 0 };
910 struct stat stat_buf;
911 char *chk_major, *chk_minor;
912 char *savept = NULL, *dev;
914 char buf[PATH_MAX] = {'\0'}, path[PATH_MAX] = {'\0'};
915 char real_path[PATH_MAX] = {'\0'};
922 ret_path = realpath(source, real_path);
923 if (ret_path == NULL) {
925 fprintf(stderr, "warning: %s: cannot resolve: %s\n",
926 source, strerror(errno));
930 if (strncmp(real_path, "/dev/loop", 9) == 0)
933 if ((real_path[0] != '/') && (strpbrk(real_path, ",:") != NULL))
936 snprintf(path, sizeof(path), "/sys/block%s", real_path + 4);
937 if (access(path, X_OK) == 0)
940 /* The name of the device say 'X' specified in /dev/X may not
941 * match any entry under /sys/block/. In that case we need to
942 * match the major/minor number to find the entry under
943 * sys/block corresponding to /dev/X */
945 /* Don't chop tail digit on /dev/mapper/xxx, LU-478 */
946 if (strncmp(real_path, "/dev/mapper", 11) != 0) {
947 dev = real_path + strlen(real_path);
948 while (--dev > real_path && isdigit(*dev))
951 if (strncmp(real_path, "/dev/md_", 8) == 0)
955 rc = stat(real_path, &stat_buf);
958 fprintf(stderr, "warning: %s, device %s stat failed\n",
959 strerror(errno), real_path);
963 major = major(stat_buf.st_rdev);
964 minor = minor(stat_buf.st_rdev);
965 rc = glob("/sys/block/*", GLOB_NOSORT, NULL, &glob_info);
968 fprintf(stderr, "warning: failed to read entries under "
970 globfree(&glob_info);
974 for (i = 0; i < glob_info.gl_pathc; i++){
975 snprintf(path, sizeof(path), "%s/dev", glob_info.gl_pathv[i]);
977 rc = read_file(path, buf, sizeof(buf));
981 if (buf[strlen(buf) - 1] == '\n')
982 buf[strlen(buf) - 1] = '\0';
984 chk_major = strtok_r(buf, ":", &savept);
986 if (major == atoi(chk_major) &&minor == atoi(chk_minor))
990 if (i == glob_info.gl_pathc) {
992 fprintf(stderr,"warning: device %s does not match any "
993 "entry under /sys/block\n", real_path);
994 globfree(&glob_info);
998 /* Chop off "/dev" from path we found */
999 path[strlen(glob_info.gl_pathv[i])] = '\0';
1000 globfree(&glob_info);
1003 if (strncmp(real_path, "/dev/md", 7) == 0) {
1004 snprintf(real_path, sizeof(real_path), "%s/%s", path,
1007 rc = read_file(real_path, buf, sizeof(buf));
1010 fprintf(stderr, "warning: opening %s: %s\n",
1011 real_path, strerror(errno));
1015 if (atoi(buf) >= mop->mo_md_stripe_cache_size)
1018 if (strlen(buf) - 1 > 0) {
1019 snprintf(buf, sizeof(buf), "%d",
1020 mop->mo_md_stripe_cache_size);
1021 rc = write_file(real_path, buf);
1023 fprintf(stderr, "warning: opening %s: %s\n",
1024 real_path, strerror(errno));
1026 /* Return since raid and disk tunables are different */
1030 snprintf(real_path, sizeof(real_path), "%s/%s", path,
1031 MAX_HW_SECTORS_KB_PATH);
1032 rc = read_file(real_path, buf, sizeof(buf));
1035 fprintf(stderr, "warning: opening %s: %s\n",
1036 real_path, strerror(errno));
1037 /* No MAX_HW_SECTORS_KB_PATH isn't necessary an
1038 * error for some device. */
1042 if (strlen(buf) - 1 > 0) {
1043 snprintf(real_path, sizeof(real_path), "%s/%s", path,
1044 MAX_SECTORS_KB_PATH);
1045 rc = write_file(real_path, buf);
1048 fprintf(stderr, "warning: writing to %s: %s\n",
1049 real_path, strerror(errno));
1050 /* No MAX_SECTORS_KB_PATH isn't necessary an
1051 * error for some device. */
1056 /* Purposely ignore errors reported from set_blockdev_scheduler.
1057 * The worst that will happen is a block device with an "incorrect"
1059 snprintf(real_path, sizeof(real_path), "%s/%s", path, SCHEDULER_PATH);
1060 set_blockdev_scheduler(real_path, DEFAULT_SCHEDULER);
1064 glob_info.gl_pathc = 0;
1065 glob_info.gl_offs = 0;
1066 /* if device is multipath device, tune its slave devices */
1067 snprintf(real_path, sizeof(real_path), "%s/slaves/*", path);
1068 rc = glob(real_path, GLOB_NOSORT, NULL, &glob_info);
1070 for (i = 0; rc == 0 && i < glob_info.gl_pathc; i++){
1071 slave = basename(glob_info.gl_pathv[i]);
1072 snprintf(real_path, sizeof(real_path), "/dev/%s", slave);
1073 rc = set_blockdev_tunables(real_path, mop, 0);
1076 if (rc == GLOB_NOMATCH) {
1077 /* no slave device is not an error */
1079 } else if (rc && verbose) {
1080 if (slave == NULL) {
1081 fprintf(stderr, "warning: %s, failed to read"
1082 " entries under %s/slaves\n",
1083 strerror(errno), path);
1085 fprintf(stderr, "unable to set tunables for"
1086 " slave device %s (slave would be"
1087 " unable to handle IO request from"
1092 globfree(&glob_info);
1098 int ldiskfs_tune_lustre(char *dev, struct mount_opts *mop)
1100 return set_blockdev_tunables(dev, mop, 1);
1103 int ldiskfs_label_lustre(struct mount_opts *mop)
1105 char label_cmd[PATH_MAX];
1108 snprintf(label_cmd, sizeof(label_cmd),
1109 TUNE2FS" -f -L '%s' '%s' >/dev/null 2>&1",
1110 mop->mo_ldd.ldd_svname, mop->mo_source);
1111 rc = run_command(label_cmd, sizeof(label_cmd));
1116 /* return canonicalized absolute pathname, even if the target file does not
1117 * exist, unlike realpath */
1118 static char *absolute_path(char *devname)
1120 char buf[PATH_MAX + 1];
1124 path = malloc(PATH_MAX + 1);
1128 if (devname[0] != '/') {
1129 if (getcwd(buf, sizeof(buf) - 1) == NULL) {
1134 strcat(buf, devname);
1136 strcpy(buf, devname);
1138 /* truncate filename before calling realpath */
1139 ptr = strrchr(buf, '/');
1145 if (path != realpath(buf, path)) {
1149 /* add the filename back */
1151 strcat(path, ptr + 1);
1155 /* Determine if a device is a block device (as opposed to a file) */
1156 int is_block(char* devname)
1162 devpath = absolute_path(devname);
1163 if (devpath == NULL) {
1164 fprintf(stderr, "%s: failed to resolve path to %s\n",
1169 ret = access(devname, F_OK);
1171 if (strncmp(devpath, "/dev/", 5) == 0) {
1172 /* nobody sane wants to create a loopback file under
1173 * /dev. Let's just report the device doesn't exist */
1174 fprintf(stderr, "%s: %s apparently does not exist\n",
1182 ret = stat(devpath, &st);
1184 fprintf(stderr, "%s: cannot stat %s\n", progname, devpath);
1187 ret = S_ISBLK(st.st_mode);
1193 static int is_feature_enabled(const char *feature, const char *devpath)
1197 char enabled_features[4096] = "";
1200 snprintf(cmd, sizeof(cmd), "%s -R features %s 2>&1",
1203 /* Using popen() instead of run_command() since debugfs does
1204 * not return proper error code if command is not supported */
1205 fp = popen(cmd, "r");
1207 fprintf(stderr, "%s: %s\n", progname, strerror(errno));
1211 ret = fread(enabled_features, 1, sizeof(enabled_features) - 1, fp);
1212 enabled_features[ret] = '\0';
1215 if (strstr(enabled_features, feature))
1220 /* Enable quota accounting */
1221 int ldiskfs_enable_quota(struct mkfs_opts *mop)
1225 int cmdsz = sizeof(cmd), ret;
1227 if (is_e2fsprogs_feature_supp("-O quota") != 0) {
1228 fprintf(stderr, "%s: \"-O quota\" is is not supported by "
1229 "current e2fsprogs\n", progname);
1233 dev = mop->mo_device;
1234 if (mop->mo_flags & MO_IS_LOOP)
1235 dev = mop->mo_loopdev;
1237 /* Quota feature is already enabled? */
1238 if (is_feature_enabled("quota", dev)) {
1239 vprint("Quota feature is already enabled.\n");
1243 /* Turn on quota feature by "tune2fs -O quota" */
1244 snprintf(cmd, cmdsz, "%s -O quota %s", TUNE2FS, dev);
1245 ret = run_command(cmd, cmdsz);
1247 fprintf(stderr, "command:%s (%d)", cmd, ret);
1252 int ldiskfs_init(void)
1254 /* Required because full path to DEBUGFS is not specified */
1255 setenv("PATH", "/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin", 0);
1260 void ldiskfs_fini(void)