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, 2014, 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 #include <linux/fs.h> /* for BLKGETSIZE64 */
72 #include <linux/version.h>
73 #include <lustre_disk.h>
74 #include <lustre_param.h>
75 #include <lnet/lnetctl.h>
76 #include <lustre_ver.h>
79 #include <selinux/selinux.h>
82 #define MAX_HW_SECTORS_KB_PATH "queue/max_hw_sectors_kb"
83 #define MAX_SECTORS_KB_PATH "queue/max_sectors_kb"
84 #define SCHEDULER_PATH "queue/scheduler"
85 #define STRIPE_CACHE_SIZE "md/stripe_cache_size"
87 #define DEFAULT_SCHEDULER "deadline"
89 extern char *progname;
91 #define L_BLOCK_SIZE 4096
92 /* keep it less than LL_FID_NAMELEN */
93 #define DUMMY_FILE_NAME_LEN 25
94 #define EXT3_DIRENT_SIZE DUMMY_FILE_NAME_LEN
97 * Concatenate context of the temporary mount point iff selinux is enabled
100 static void append_context_for_mount(char *mntpt, struct mkfs_opts *mop)
102 security_context_t fcontext;
104 if (getfilecon(mntpt, &fcontext) < 0) {
105 /* Continuing with default behaviour */
106 fprintf(stderr, "%s: Get file context failed : %s\n",
107 progname, strerror(errno));
111 if (fcontext != NULL) {
112 strcat(mop->mo_ldd.ldd_mount_opts, ",context=");
113 strcat(mop->mo_ldd.ldd_mount_opts, fcontext);
119 /* return canonicalized absolute pathname, even if the target file does not
120 * exist, unlike realpath */
121 static char *absolute_path(char *devname)
123 char buf[PATH_MAX + 1] = "";
128 path = malloc(sizeof(buf));
132 if (devname[0] != '/') {
133 if (getcwd(buf, sizeof(buf) - 1) == NULL) {
137 len = snprintf(path, sizeof(buf), "%s/%s", buf, devname);
138 if (len >= sizeof(buf)) {
143 len = snprintf(path, sizeof(buf), "%s", devname);
144 if (len >= sizeof(buf)) {
150 /* truncate filename before calling realpath */
151 ptr = strrchr(path, '/');
157 if (buf != realpath(path, buf)) {
161 /* add the filename back */
162 len = snprintf(path, PATH_MAX, "%s/%s", buf, ptr+1);
163 if (len >= PATH_MAX) {
170 /* Determine if a device is a block device (as opposed to a file) */
171 static int is_block(char *devname)
177 devpath = absolute_path(devname);
178 if (devpath == NULL) {
179 fprintf(stderr, "%s: failed to resolve path to %s\n",
184 ret = access(devname, F_OK);
186 if (strncmp(devpath, "/dev/", 5) == 0) {
187 /* nobody sane wants to create a loopback file under
188 * /dev. Let's just report the device doesn't exist */
189 fprintf(stderr, "%s: %s apparently does not exist\n",
197 ret = stat(devpath, &st);
199 fprintf(stderr, "%s: cannot stat %s\n", progname, devpath);
202 ret = S_ISBLK(st.st_mode);
208 static int is_feature_enabled(const char *feature, const char *devpath)
212 char enabled_features[4096] = "";
215 snprintf(cmd, sizeof(cmd), "%s -R features %s 2>&1",
218 /* Using popen() instead of run_command() since debugfs does
219 * not return proper error code if command is not supported */
220 fp = popen(cmd, "r");
222 fprintf(stderr, "%s: %s\n", progname, strerror(errno));
226 ret = fread(enabled_features, 1, sizeof(enabled_features) - 1, fp);
227 enabled_features[ret] = '\0';
230 if (strstr(enabled_features, feature))
235 /* Write the server config files */
236 int ldiskfs_write_ldd(struct mkfs_opts *mop)
238 char mntpt[] = "/tmp/mntXXXXXX";
245 /* Mount this device temporarily in order to write these files */
246 if (!mkdtemp(mntpt)) {
247 fprintf(stderr, "%s: Can't create temp mount point %s: %s\n",
248 progname, mntpt, strerror(errno));
253 * Append file context to mount options if SE Linux is enabled
256 if (is_selinux_enabled() > 0)
257 append_context_for_mount(mntpt, mop);
260 dev = mop->mo_device;
261 if (mop->mo_flags & MO_IS_LOOP)
262 dev = mop->mo_loopdev;
264 ret = mount(dev, mntpt, MT_STR(&mop->mo_ldd), 0,
265 mop->mo_ldd.ldd_mount_opts);
267 fprintf(stderr, "%s: Unable to mount %s: %s\n",
268 progname, dev, strerror(errno));
270 if (errno == ENODEV) {
271 fprintf(stderr, "Is the %s module available?\n",
272 MT_STR(&mop->mo_ldd));
277 /* Set up initial directories */
278 sprintf(filepnm, "%s/%s", mntpt, MOUNT_CONFIGS_DIR);
279 ret = mkdir(filepnm, 0777);
280 if ((ret != 0) && (errno != EEXIST)) {
281 fprintf(stderr, "%s: Can't make configs dir %s (%s)\n",
282 progname, filepnm, strerror(errno));
284 } else if (errno == EEXIST) {
288 /* Save the persistent mount data into a file. Lustre must pre-read
289 this file to get the real mount options. */
290 vprint("Writing %s\n", MOUNT_DATA_FILE);
291 sprintf(filepnm, "%s/%s", mntpt, MOUNT_DATA_FILE);
292 filep = fopen(filepnm, "w");
294 fprintf(stderr, "%s: Unable to create %s file: %s\n",
295 progname, filepnm, strerror(errno));
298 num = fwrite(&mop->mo_ldd, sizeof(mop->mo_ldd), 1, filep);
299 if (num < 1 && ferror(filep)) {
300 fprintf(stderr, "%s: Unable to write to file (%s): %s\n",
301 progname, filepnm, strerror(errno));
314 static int readcmd(char *cmd, char *buf, int len)
319 fp = popen(cmd, "r");
323 red = fread(buf, 1, len, fp);
326 /* strip trailing newline */
327 if (buf[red - 1] == '\n')
330 return (red == 0) ? -ENOENT : 0;
333 int ldiskfs_read_ldd(char *dev, struct lustre_disk_data *mo_ldd)
335 char tmpdir[] = "/tmp/dirXXXXXX";
340 int cmdsz = sizeof(cmd);
342 /* Make a temporary directory to hold Lustre data files. */
343 if (!mkdtemp(tmpdir)) {
344 fprintf(stderr, "%s: Can't create temporary directory %s: %s\n",
345 progname, tmpdir, strerror(errno));
349 /* TODO: it's worth observing the get_mountdata() function that is
350 in mount_utils.c for getting the mountdata out of the
353 /* Construct debugfs command line. */
354 snprintf(cmd, cmdsz, "%s -c -R 'dump /%s %s/mountdata' '%s'",
355 DEBUGFS, MOUNT_DATA_FILE, tmpdir, dev);
357 ret = run_command(cmd, cmdsz);
359 verrprint("%s: Unable to dump %s dir (%d)\n",
360 progname, MOUNT_CONFIGS_DIR, ret);
362 sprintf(filepnm, "%s/mountdata", tmpdir);
363 filep = fopen(filepnm, "r");
366 vprint("Reading %s\n", MOUNT_DATA_FILE);
367 num_read = fread(mo_ldd, sizeof(*mo_ldd), 1, filep);
368 if (num_read < 1 && ferror(filep)) {
369 fprintf(stderr, "%s: Unable to read from file %s: %s\n",
370 progname, filepnm, strerror(errno));
375 snprintf(cmd, cmdsz, "rm -rf %s", tmpdir);
376 run_command(cmd, cmdsz);
378 verrprint("Failed to read old data (%d)\n", ret);
380 /* As long as we at least have the label, we're good to go */
381 snprintf(cmd, sizeof(cmd), E2LABEL" %s", dev);
382 ret = readcmd(cmd, mo_ldd->ldd_svname, sizeof(mo_ldd->ldd_svname) - 1);
388 /* Display the need for the latest e2fsprogs to be installed. make_backfs
389 * indicates if the caller is make_lustre_backfs() or not. */
390 static void disp_old_e2fsprogs_msg(const char *feature, int make_backfs)
392 static int msg_displayed;
395 fprintf(stderr, "WARNING: %s does not support %s "
396 "feature.\n\n", E2FSPROGS, feature);
402 fprintf(stderr, "WARNING: The %s package currently installed on "
403 "your system does not support \"%s\" feature.\n",
405 #if !(HAVE_LDISKFSPROGS)
406 fprintf(stderr, "Please install the latest version of e2fsprogs from\n"
407 "https://downloads.hpdd.intel.com/public/e2fsprogs/latest/\n"
408 "to enable this feature.\n");
411 fprintf(stderr, "Feature will not be enabled until %s"
412 "is updated and '%s -O %s %%{device}' "
413 "is run.\n\n", E2FSPROGS, TUNE2FS, feature);
416 /* Check whether the file exists in the device */
417 static int file_in_dev(char *file_name, char *dev_name)
420 char debugfs_cmd[256];
421 unsigned int inode_num;
424 /* Construct debugfs command line. */
425 snprintf(debugfs_cmd, sizeof(debugfs_cmd),
426 "%s -c -R 'stat %s' '%s' 2>&1 | egrep '(Inode|unsupported)'",
427 DEBUGFS, file_name, dev_name);
429 fp = popen(debugfs_cmd, "r");
431 fprintf(stderr, "%s: %s\n", progname, strerror(errno));
435 if (fscanf(fp, "Inode: %u", &inode_num) == 1) { /* exist */
439 i = fread(debugfs_cmd, 1, sizeof(debugfs_cmd) - 1, fp);
442 fprintf(stderr, "%s", debugfs_cmd);
443 if (strstr(debugfs_cmd, "unsupported feature")) {
444 disp_old_e2fsprogs_msg("an unknown", 0);
453 /* Check whether the device has already been used with lustre */
454 int ldiskfs_is_lustre(char *dev, unsigned *mount_type)
458 ret = file_in_dev(MOUNT_DATA_FILE, dev);
460 /* in the -1 case, 'extents' means IS a lustre target */
461 *mount_type = LDD_MT_LDISKFS;
465 ret = file_in_dev(LAST_RCVD, dev);
467 *mount_type = LDD_MT_LDISKFS;
474 /* Check if a certain feature is supported by e2fsprogs.
475 * Firstly we try to use "debugfs supported_features" command to check if
476 * the feature is supported. If this fails we try to set this feature with
477 * mke2fs to check for its support. */
478 static int is_e2fsprogs_feature_supp(const char *feature)
480 static char supp_features[4096] = "";
483 char imgname[] = "/tmp/test-img-XXXXXX";
487 if (supp_features[0] == '\0') {
488 snprintf(cmd, sizeof(cmd), "%s -c -R supported_features 2>&1",
491 /* Using popen() instead of run_command() since debugfs does
492 * not return proper error code if command is not supported */
493 fp = popen(cmd, "r");
495 fprintf(stderr, "%s: %s\n", progname, strerror(errno));
498 ret = fread(supp_features, 1, sizeof(supp_features) - 1, fp);
499 supp_features[ret] = '\0';
502 if (ret > 0 && strstr(supp_features,
503 strncmp(feature, "-O ", 3) ? feature : feature+3))
506 if ((fd = mkstemp(imgname)) < 0)
511 snprintf(cmd, sizeof(cmd), "%s -F %s %s 100 >/dev/null 2>&1",
512 MKE2FS, feature, imgname);
513 /* run_command() displays the output of mke2fs when it fails for
514 * some feature, so use system() directly */
523 * append_unique: append @key or @key=@val pair to @buf only if @key does not
525 * @buf: buffer to hold @key or @key=@val
526 * @prefix: prefix string before @key
528 * @val: value string if it's a @key=@val pair
530 static void append_unique(char *buf, char *prefix, char *key, char *val,
539 anchor = end = strstr(buf, key);
540 /* try to find exact match string in @buf */
541 while (end && *end != '\0' && *end != ',' && *end != ' ' && *end != '=')
544 if (anchor == NULL || strlen(key) != len ||
545 strncmp(anchor, key, len) != 0) {
547 strscat(buf, prefix, maxbuflen);
549 strscat(buf, key, maxbuflen);
551 strscat(buf, "=", maxbuflen);
552 strscat(buf, val, maxbuflen);
557 static int enable_default_ext4_features(struct mkfs_opts *mop, char *anchor,
558 size_t maxbuflen, int user_spec)
560 if (IS_OST(&mop->mo_ldd)) {
561 append_unique(anchor, user_spec ? "," : " -O ",
562 "extents", NULL, sizeof(mop->mo_mkfsopts));
563 append_unique(anchor, ",", "uninit_bg", NULL, maxbuflen);
564 } else if (IS_MDT(&mop->mo_ldd)) {
565 append_unique(anchor, user_spec ? "," : " -O ",
566 "dirdata", NULL, maxbuflen);
567 append_unique(anchor, ",", "uninit_bg", NULL, maxbuflen);
568 append_unique(anchor, ",", "^extents", NULL, maxbuflen);
570 append_unique(anchor, user_spec ? "," : " -O ",
571 "uninit_bg", NULL, maxbuflen);
574 /* Multiple mount protection enabled only if failover node specified */
575 if (mop->mo_flags & MO_FAILOVER) {
576 if (is_e2fsprogs_feature_supp("-O mmp") == 0)
577 append_unique(anchor, ",", "mmp", NULL, maxbuflen);
579 disp_old_e2fsprogs_msg("mmp", 1);
582 /* Allow more than 65000 subdirectories */
583 if (is_e2fsprogs_feature_supp("-O dir_nlink") == 0)
584 append_unique(anchor, ",", "dir_nlink", NULL, maxbuflen);
586 /* The following options are only valid for ext4-based ldiskfs.
587 * If --backfstype=ext3 is specified, do not enable them. */
588 if (mop->mo_ldd.ldd_mount_type == LDD_MT_EXT3)
591 /* Enable quota by default */
592 if (is_e2fsprogs_feature_supp("-O quota") == 0) {
593 append_unique(anchor, ",", "quota", NULL, maxbuflen);
596 fprintf(stderr, "\"-O quota\" must be supported by "
597 "e2fsprogs, please upgrade your e2fsprogs.\n");
601 /* Allow files larger than 2TB. Also needs LU-16, but not harmful. */
602 if (is_e2fsprogs_feature_supp("-O huge_file") == 0)
603 append_unique(anchor, ",", "huge_file", NULL, maxbuflen);
605 /* Enable large block addresses if the LUN is over 2^32 blocks. */
606 if (mop->mo_device_kb / (L_BLOCK_SIZE >> 10) >= 0x100002000ULL &&
607 is_e2fsprogs_feature_supp("-O 64bit") == 0)
608 append_unique(anchor, ",", "64bit", NULL, maxbuflen);
610 /* Cluster inode/block bitmaps and inode table for more efficient IO.
611 * Align the flex groups on a 1MB boundary for better performance. */
612 /* This -O feature needs to go last, since it adds the "-G" option. */
613 if (is_e2fsprogs_feature_supp("-O flex_bg") == 0) {
616 append_unique(anchor, ",", "flex_bg", NULL, maxbuflen);
618 if (IS_OST(&mop->mo_ldd) &&
619 strstr(mop->mo_mkfsopts, "-G") == NULL) {
620 snprintf(tmp_buf, sizeof(tmp_buf), " -G %u",
621 (1 << 20) / L_BLOCK_SIZE);
622 strscat(anchor, tmp_buf, maxbuflen);
625 /* Don't add any more "-O" options here, see last comment above */
630 * moveopts_to_end: find the option string, move remaining strings to
631 * where option string starts, and append the option
633 * @start: where the option string starts before the move
634 * RETURN: where the option string starts after the move
636 static char *moveopts_to_end(char *start)
642 /* skip whitespace before options */
647 /* find end of option characters */
648 while (*end != ' ' && *end != '\0')
652 if (len >= sizeof(save))
653 len = sizeof(save) - 1;
656 strncpy(save, start, len);
659 /* move remaining options up front */
661 memmove(start, end, strlen(end));
662 *(start + strlen(end)) = '\0';
664 /* append the specified options */
665 if (*(start + strlen(start) - 1) != ' ')
667 idx = start + strlen(start);
673 /* Build fs according to type */
674 int ldiskfs_make_lustre(struct mkfs_opts *mop)
676 __u64 device_kb = mop->mo_device_kb, block_count = 0;
677 char mkfs_cmd[PATH_MAX];
681 int ret = 0, ext_opts = 0;
684 if (!(mop->mo_flags & MO_IS_LOOP)) {
685 mop->mo_device_kb = get_device_size(mop->mo_device);
687 if (mop->mo_device_kb == 0)
690 /* Compare to real size */
691 if (device_kb == 0 || device_kb > mop->mo_device_kb)
692 device_kb = mop->mo_device_kb;
694 mop->mo_device_kb = device_kb;
697 if (mop->mo_device_kb != 0) {
698 if (mop->mo_device_kb < 8096) {
699 fprintf(stderr, "%s: size of filesystem must be larger "
700 "than 8MB, but is set to %lldKB\n",
701 progname, (long long)mop->mo_device_kb);
704 block_count = mop->mo_device_kb / (L_BLOCK_SIZE >> 10);
705 /* If the LUN size is just over 2^32 blocks, limit the
706 * filesystem size to 2^32-1 blocks to avoid problems with
707 * ldiskfs/mkfs not handling this size. Bug 22906 */
708 if (block_count > 0xffffffffULL && block_count < 0x100002000ULL)
709 block_count = 0xffffffffULL;
712 if ((mop->mo_ldd.ldd_mount_type == LDD_MT_EXT3) ||
713 (mop->mo_ldd.ldd_mount_type == LDD_MT_LDISKFS) ||
714 (mop->mo_ldd.ldd_mount_type == LDD_MT_LDISKFS2)) {
717 /* Journal size in MB */
718 if (strstr(mop->mo_mkfsopts, "-J") == NULL &&
719 device_kb > 1024 * 1024) {
720 /* Choose our own default journal size */
721 long journal_mb = 0, max_mb;
723 /* cap journal size at 4GB for MDT,
724 * leave it at 400MB for OSTs. */
725 if (IS_MDT(&mop->mo_ldd))
727 else if (IS_OST(&mop->mo_ldd))
729 else /* Use mke2fs default size for MGS */
732 /* Use at most 4% of device for journal */
733 journal_mb = device_kb * 4 / (1024 * 100);
734 if (journal_mb > max_mb)
738 sprintf(buf, " -J size=%ld", journal_mb);
739 strscat(mop->mo_mkfsopts, buf,
740 sizeof(mop->mo_mkfsopts));
744 /* Inode size (for extended attributes). The LOV EA size is
745 * 32 (EA hdr) + 32 (lov_mds_md) + stripes * 24 (lov_ost_data),
746 * and we want some margin above that for ACLs, other EAs... */
747 if (strstr(mop->mo_mkfsopts, "-I") == NULL) {
748 if (IS_MDT(&mop->mo_ldd)) {
749 if (mop->mo_stripe_count > 72)
750 inode_size = 512; /* bz 7241 */
751 /* see also "-i" below for EA blocks */
752 else if (mop->mo_stripe_count > 32)
754 else if (mop->mo_stripe_count > 10)
758 } else if (IS_OST(&mop->mo_ldd)) {
759 /* We store MDS FID and OST objid in EA on OST
760 * we need to make inode bigger as well. */
764 if (inode_size > 0) {
765 sprintf(buf, " -I %ld", inode_size);
766 strscat(mop->mo_mkfsopts, buf,
767 sizeof(mop->mo_mkfsopts));
771 /* Bytes_per_inode: disk size / num inodes */
772 if (strstr(mop->mo_mkfsopts, "-i") == NULL &&
773 strstr(mop->mo_mkfsopts, "-N") == NULL) {
774 long bytes_per_inode = 0;
776 /* Allocate more inodes on MDT devices. There is
777 * no data stored on the MDT, and very little extra
778 * metadata beyond the inode. It could go down as
779 * low as 1024 bytes, but this is conservative.
780 * Account for external EA blocks for wide striping. */
781 if (IS_MDT(&mop->mo_ldd)) {
782 bytes_per_inode = inode_size + 1536;
784 if (mop->mo_stripe_count > 72) {
785 int extra = mop->mo_stripe_count * 24;
786 extra = ((extra - 1) | 4095) + 1;
787 bytes_per_inode += extra;
791 /* Allocate fewer inodes on large OST devices. Most
792 * filesystems can be much more aggressive than even
793 * this, but it is impossible to know in advance. */
794 if (IS_OST(&mop->mo_ldd)) {
795 /* OST > 16TB assume average file size 1MB */
796 if (device_kb > (16ULL << 30))
797 bytes_per_inode = 1024 * 1024;
798 /* OST > 4TB assume average file size 512kB */
799 else if (device_kb > (4ULL << 30))
800 bytes_per_inode = 512 * 1024;
801 /* OST > 1TB assume average file size 256kB */
802 else if (device_kb > (1ULL << 30))
803 bytes_per_inode = 256 * 1024;
804 /* OST > 10GB assume average file size 64kB,
805 * plus a bit so that inodes will fit into a
806 * 256x flex_bg without overflowing */
807 else if (device_kb > (10ULL << 20))
808 bytes_per_inode = 69905;
811 if (bytes_per_inode > 0) {
812 sprintf(buf, " -i %ld", bytes_per_inode);
813 strscat(mop->mo_mkfsopts, buf,
814 sizeof(mop->mo_mkfsopts));
819 strscat(mop->mo_mkfsopts, " -q",
820 sizeof(mop->mo_mkfsopts));
823 /* start handle -O mkfs options */
824 if ((start = strstr(mop->mo_mkfsopts, "-O")) != NULL) {
825 if (strstr(start + 2, "-O") != NULL) {
827 "%s: don't specify multiple -O options\n",
831 start = moveopts_to_end(start);
832 maxbuflen = sizeof(mop->mo_mkfsopts) -
833 (start - mop->mo_mkfsopts) - strlen(start);
834 ret = enable_default_ext4_features(mop, start, maxbuflen, 1);
836 start = mop->mo_mkfsopts + strlen(mop->mo_mkfsopts),
837 maxbuflen = sizeof(mop->mo_mkfsopts) -
838 strlen(mop->mo_mkfsopts);
839 ret = enable_default_ext4_features(mop, start, maxbuflen, 0);
843 /* end handle -O mkfs options */
845 /* start handle -E mkfs options */
846 if ((start = strstr(mop->mo_mkfsopts, "-E")) != NULL) {
847 if (strstr(start + 2, "-E") != NULL) {
849 "%s: don't specify multiple -E options\n",
853 start = moveopts_to_end(start);
854 maxbuflen = sizeof(mop->mo_mkfsopts) -
855 (start - mop->mo_mkfsopts) - strlen(start);
858 start = mop->mo_mkfsopts + strlen(mop->mo_mkfsopts);
859 maxbuflen = sizeof(mop->mo_mkfsopts) -
860 strlen(mop->mo_mkfsopts);
863 /* In order to align the filesystem metadata on 1MB boundaries,
864 * give a resize value that will reserve a power-of-two group
865 * descriptor blocks, but leave one block for the superblock.
866 * Only useful for filesystems with < 2^32 blocks due to resize
868 if (IS_OST(&mop->mo_ldd) && mop->mo_device_kb > 100 * 1024 &&
869 mop->mo_device_kb * 1024 / L_BLOCK_SIZE <= 0xffffffffULL) {
870 unsigned group_blocks = L_BLOCK_SIZE * 8;
871 unsigned desc_per_block = L_BLOCK_SIZE / 32;
872 unsigned resize_blks;
874 resize_blks = (1ULL<<32) - desc_per_block*group_blocks;
875 snprintf(buf, sizeof(buf), "%u", resize_blks);
876 append_unique(start, ext_opts ? "," : " -E ",
877 "resize", buf, maxbuflen);
881 /* Avoid zeroing out the full journal - speeds up mkfs */
882 if (is_e2fsprogs_feature_supp("-E lazy_journal_init") == 0)
883 append_unique(start, ext_opts ? "," : " -E ",
884 "lazy_journal_init", NULL, maxbuflen);
885 /* end handle -E mkfs options */
887 /* Allow reformat of full devices (as opposed to
888 partitions.) We already checked for mounted dev. */
889 strscat(mop->mo_mkfsopts, " -F", sizeof(mop->mo_mkfsopts));
891 snprintf(mkfs_cmd, sizeof(mkfs_cmd),
892 "%s -j -b %d -L %s ", MKE2FS, L_BLOCK_SIZE,
893 mop->mo_ldd.ldd_svname);
895 fprintf(stderr,"%s: unsupported fs type: %d (%s)\n",
896 progname, mop->mo_ldd.ldd_mount_type,
897 MT_STR(&mop->mo_ldd));
901 /* For loop device format the dev, not the filename */
902 dev = mop->mo_device;
903 if (mop->mo_flags & MO_IS_LOOP)
904 dev = mop->mo_loopdev;
906 vprint("formatting backing filesystem %s on %s\n",
907 MT_STR(&mop->mo_ldd), dev);
908 vprint("\ttarget name %s\n", mop->mo_ldd.ldd_svname);
909 vprint("\t4k blocks "LPU64"\n", block_count);
910 vprint("\toptions %s\n", mop->mo_mkfsopts);
912 /* mkfs_cmd's trailing space is important! */
913 strscat(mkfs_cmd, mop->mo_mkfsopts, sizeof(mkfs_cmd));
914 strscat(mkfs_cmd, " ", sizeof(mkfs_cmd));
915 strscat(mkfs_cmd, dev, sizeof(mkfs_cmd));
916 if (block_count != 0) {
917 sprintf(buf, " "LPU64, block_count);
918 strscat(mkfs_cmd, buf, sizeof(mkfs_cmd));
921 vprint("mkfs_cmd = %s\n", mkfs_cmd);
922 ret = run_command(mkfs_cmd, sizeof(mkfs_cmd));
925 fprintf(stderr, "Unable to build fs %s (%d)\n", dev, ret);
930 int ldiskfs_prepare_lustre(struct mkfs_opts *mop,
931 char *default_mountopts, int default_len,
932 char *always_mountopts, int always_len)
934 struct lustre_disk_data *ldd = &mop->mo_ldd;
937 /* Set MO_IS_LOOP to indicate a loopback device is needed */
938 ret = is_block(mop->mo_device);
941 } else if (ret == 0) {
942 mop->mo_flags |= MO_IS_LOOP;
945 strscat(default_mountopts, ",errors=remount-ro", default_len);
946 if (IS_MDT(ldd) || IS_MGS(ldd))
947 strscat(always_mountopts, ",user_xattr", always_len);
952 static int read_file(const char *path, char *buf, int size)
956 fd = fopen(path, "r");
960 if (fgets(buf, size, fd) == NULL) {
961 fprintf(stderr, "reading from %s: %s", path, strerror(errno));
967 /* strip trailing newline */
969 if (buf[size - 1] == '\n')
970 buf[size - 1] = '\0';
975 static int write_file(const char *path, const char *buf)
979 fd = fopen(path, "w");
988 static int set_blockdev_scheduler(const char *path, const char *scheduler)
990 char buf[PATH_MAX], *s, *e, orig_sched[50];
993 /* Before setting the scheduler, we need to check to see if it's
994 * already set to "noop". If it is, we don't want to override
995 * that setting. If it's set to anything other than "noop", set
996 * the scheduler to what has been passed in. */
998 rc = read_file(path, buf, sizeof(buf));
1001 fprintf(stderr, "%s: cannot open '%s': %s\n",
1002 progname, path, strerror(errno));
1006 /* The expected format of buf: noop anticipatory deadline [cfq] */
1007 s = strchr(buf, '[');
1008 e = strchr(buf, ']');
1010 /* If the format is not what we expect. Play it safe and error out. */
1011 if (s == NULL || e == NULL) {
1013 fprintf(stderr, "%s: cannot parse scheduler "
1014 "options for '%s'\n", progname, path);
1018 snprintf(orig_sched, e - s, "%s", s + 1);
1020 if (strcmp(orig_sched, "noop") == 0 ||
1021 strcmp(orig_sched, scheduler) == 0)
1024 rc = write_file(path, scheduler);
1027 fprintf(stderr, "%s: cannot set scheduler on "
1028 "'%s': %s\n", progname, path,
1032 fprintf(stderr, "%s: change scheduler of %s from %s to %s\n",
1033 progname, path, orig_sched, scheduler);
1039 /* This is to tune the kernel for good SCSI performance.
1040 * For that we set the value of /sys/block/{dev}/queue/max_sectors_kb
1041 * to the value of /sys/block/{dev}/queue/max_hw_sectors_kb */
1042 static int set_blockdev_tunables(char *source, struct mount_opts *mop)
1044 glob_t glob_info = { 0 };
1045 struct stat stat_buf;
1046 char *chk_major, *chk_minor;
1047 char *savept = NULL, *dev;
1049 char buf[PATH_MAX] = {'\0'}, path[PATH_MAX] = {'\0'};
1050 char real_path[PATH_MAX] = {'\0'};
1058 ret_path = realpath(source, real_path);
1059 if (ret_path == NULL) {
1061 fprintf(stderr, "warning: %s: cannot resolve: %s\n",
1062 source, strerror(errno));
1066 if (strncmp(real_path, "/dev/loop", 9) == 0)
1069 if ((real_path[0] != '/') && (strpbrk(real_path, ",:") != NULL))
1072 snprintf(path, sizeof(path), "/sys/block%s", real_path + 4);
1073 if (access(path, X_OK) == 0)
1076 /* The name of the device say 'X' specified in /dev/X may not
1077 * match any entry under /sys/block/. In that case we need to
1078 * match the major/minor number to find the entry under
1079 * sys/block corresponding to /dev/X */
1081 /* Don't chop tail digit on /dev/mapper/xxx, LU-478 */
1082 if (strncmp(real_path, "/dev/mapper", 11) != 0) {
1083 dev = real_path + strlen(real_path);
1084 while (--dev > real_path && isdigit(*dev))
1087 if (strncmp(real_path, "/dev/md_", 8) == 0)
1091 rc = stat(real_path, &stat_buf);
1094 fprintf(stderr, "warning: %s, device %s stat failed\n",
1095 strerror(errno), real_path);
1099 major = major(stat_buf.st_rdev);
1100 minor = minor(stat_buf.st_rdev);
1101 rc = glob("/sys/block/*", GLOB_NOSORT, NULL, &glob_info);
1104 fprintf(stderr, "warning: failed to read entries under "
1106 globfree(&glob_info);
1110 for (i = 0; i < glob_info.gl_pathc; i++){
1111 snprintf(path, sizeof(path), "%s/dev", glob_info.gl_pathv[i]);
1113 rc = read_file(path, buf, sizeof(buf));
1117 if (buf[strlen(buf) - 1] == '\n')
1118 buf[strlen(buf) - 1] = '\0';
1120 chk_major = strtok_r(buf, ":", &savept);
1122 if (chk_major != NULL && major == atoi(chk_major) &&
1123 chk_minor != NULL && minor == atoi(chk_minor))
1127 if (i == glob_info.gl_pathc) {
1129 fprintf(stderr,"warning: device %s does not match any "
1130 "entry under /sys/block\n", real_path);
1131 globfree(&glob_info);
1135 /* Chop off "/dev" from path we found */
1136 path[strlen(glob_info.gl_pathv[i])] = '\0';
1137 globfree(&glob_info);
1140 if (strncmp(real_path, "/dev/md", 7) == 0) {
1141 snprintf(real_path, sizeof(real_path), "%s/%s", path,
1144 rc = read_file(real_path, buf, sizeof(buf));
1147 fprintf(stderr, "warning: opening %s: %s\n",
1148 real_path, strerror(errno));
1152 if (atoi(buf) >= mop->mo_md_stripe_cache_size)
1155 if (strlen(buf) - 1 > 0) {
1156 snprintf(buf, sizeof(buf), "%d",
1157 mop->mo_md_stripe_cache_size);
1158 rc = write_file(real_path, buf);
1160 fprintf(stderr, "warning: opening %s: %s\n",
1161 real_path, strerror(errno));
1163 /* Return since raid and disk tunables are different */
1167 snprintf(real_path, sizeof(real_path), "%s/%s", path,
1168 MAX_HW_SECTORS_KB_PATH);
1169 rc = read_file(real_path, buf, sizeof(buf));
1172 fprintf(stderr, "warning: opening %s: %s\n",
1173 real_path, strerror(errno));
1174 /* No MAX_HW_SECTORS_KB_PATH isn't necessary an
1175 * error for some device. */
1179 if (strlen(buf) - 1 > 0) {
1180 char oldbuf[32] = "", *end = NULL;
1181 unsigned long long oldval, newval;
1183 snprintf(real_path, sizeof(real_path), "%s/%s", path,
1184 MAX_SECTORS_KB_PATH);
1185 rc = read_file(real_path, oldbuf, sizeof(oldbuf));
1186 /* Only set new parameter if different from the old one. */
1187 if (rc != 0 || strcmp(oldbuf, buf) == 0) {
1188 /* No MAX_SECTORS_KB_PATH isn't necessary an
1189 * error for some device. */
1193 newval = strtoull(buf, &end, 0);
1194 if (newval == 0 || newval == ULLONG_MAX || end == buf)
1197 /* Don't increase IO request size limit past 32MB. It is about
1198 * 2x PTLRPC_MAX_BRW_SIZE, but that isn't defined publicly. */
1199 if (newval > 32 * 1024)
1202 oldval = strtoull(oldbuf, &end, 0);
1203 /* Don't shrink the current limit. */
1204 if (oldval != ULLONG_MAX && newval <= oldval)
1207 rc = write_file(real_path, buf);
1210 fprintf(stderr, "warning: writing to %s: %s\n",
1211 real_path, strerror(errno));
1212 /* No MAX_SECTORS_KB_PATH isn't necessary an
1213 * error for some device. */
1216 fprintf(stderr, "%s: increased %s from %s to %s\n",
1217 progname, real_path, oldbuf, buf);
1221 /* Purposely ignore errors reported from set_blockdev_scheduler.
1222 * The worst that will happen is a block device with an "incorrect"
1224 snprintf(real_path, sizeof(real_path), "%s/%s", path, SCHEDULER_PATH);
1225 set_blockdev_scheduler(real_path, DEFAULT_SCHEDULER);
1227 /* if device is multipath device, tune its slave devices */
1228 glob_info.gl_pathc = 0;
1229 glob_info.gl_offs = 0;
1230 snprintf(real_path, sizeof(real_path), "%s/slaves/*", path);
1231 rc = glob(real_path, GLOB_NOSORT, NULL, &glob_info);
1233 for (i = 0; rc == 0 && i < glob_info.gl_pathc; i++) {
1234 slave = basename(glob_info.gl_pathv[i]);
1235 snprintf(real_path, sizeof(real_path), "/dev/%s", slave);
1236 rc = set_blockdev_tunables(real_path, mop);
1239 if (rc == GLOB_NOMATCH) {
1240 /* no slave device is not an error */
1242 } else if (rc && verbose) {
1243 if (slave == NULL) {
1244 fprintf(stderr, "warning: %s, failed to read"
1245 " entries under %s/slaves\n",
1246 strerror(errno), path);
1248 fprintf(stderr, "unable to set tunables for"
1249 " slave device %s (slave would be"
1250 " unable to handle IO request from"
1255 globfree(&glob_info);
1260 int ldiskfs_tune_lustre(char *dev, struct mount_opts *mop)
1262 return set_blockdev_tunables(dev, mop);
1265 int ldiskfs_label_lustre(struct mount_opts *mop)
1267 char label_cmd[PATH_MAX];
1270 snprintf(label_cmd, sizeof(label_cmd),
1271 TUNE2FS" -f -L '%s' '%s' >/dev/null 2>&1",
1272 mop->mo_ldd.ldd_svname, mop->mo_source);
1273 rc = run_command(label_cmd, sizeof(label_cmd));
1278 /* Enable quota accounting */
1279 int ldiskfs_enable_quota(struct mkfs_opts *mop)
1283 int cmdsz = sizeof(cmd), ret;
1285 if (is_e2fsprogs_feature_supp("-O quota") != 0) {
1286 fprintf(stderr, "%s: \"-O quota\" is is not supported by "
1287 "current e2fsprogs\n", progname);
1291 dev = mop->mo_device;
1292 if (mop->mo_flags & MO_IS_LOOP)
1293 dev = mop->mo_loopdev;
1295 /* Quota feature is already enabled? */
1296 if (is_feature_enabled("quota", dev)) {
1297 vprint("Quota feature is already enabled.\n");
1301 /* Turn on quota feature by "tune2fs -O quota" */
1302 snprintf(cmd, cmdsz, "%s -O quota %s", TUNE2FS, dev);
1303 ret = run_command(cmd, cmdsz);
1305 fprintf(stderr, "command:%s (%d)", cmd, ret);
1310 int ldiskfs_init(void)
1312 /* Required because full path to DEBUGFS is not specified */
1313 setenv("PATH", "/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin", 0);
1318 void ldiskfs_fini(void)