#include <sys/utsname.h>
#include "obdctl.h"
#include <lustre_ver.h>
+#include <glob.h>
+#include <ctype.h>
+
+#define MAX_HW_SECTORS_KB_PATH "queue/max_hw_sectors_kb"
+#define MAX_SECTORS_KB_PATH "queue/max_sectors_kb"
int verbose = 0;
int nomtab = 0;
fprintf(out, "%s v"LUSTRE_VERSION_STRING"\n", progname);
fprintf(out, "\nThis mount helper should only be invoked via the "
"mount (8) command,\ne.g. mount -t lustre dev dir\n\n");
- fprintf(out, "usage: %s [-fhnv] [-o <mntopt>] <device> <mountpt>\n",
+ fprintf(out, "usage: %s [-fhnv] [-o <mntopt>] <device> <mountpt>\n",
progname);
- fprintf(out,
+ fprintf(out,
"\t<device>: the disk device, or for a client:\n"
"\t\t<mgmtnid>[:<altmgtnid>...]:/<filesystem>-client\n"
"\t<filesystem>: name of the Lustre filesystem (e.g. lustre1)\n"
strcmp(mnt->mnt_dir, mtpt) == 0 &&
strcmp(mnt->mnt_type, type) == 0) {
endmntent(fp);
- return(EEXIST);
+ return(EEXIST);
}
}
endmntent(fp);
char sep;
int left = MAXNIDSTR;
lnet_nid_t nid;
-
+
converted = malloc(left);
c = converted;
while ((left > 0) && (*s1 != '/')) {
if (!s2)
goto out_free;
sep = *s2;
- *s2 = '\0';
+ *s2 = '\0';
nid = libcfs_str2nid(s1);
*s2 = sep; /* back to original string */
if (nid == LNET_NID_ANY)
{ "nosuid", 0, MS_NOSUID }, /* don't honor suid executables */
{ "dev", 1, MS_NODEV }, /* interpret device files */
{ "nodev", 0, MS_NODEV }, /* don't interpret devices */
+ { "sync", 0, MS_SYNCHRONOUS}, /* synchronous I/O */
{ "async", 1, MS_SYNCHRONOUS}, /* asynchronous I/O */
{ "auto", 0, 0 }, /* Can be mounted using -a */
{ "noauto", 0, 0 }, /* Can only be mounted explicitly */
*flagp = 0;
nextopt = orig_options;
while ((opt = strsep(&nextopt, ","))) {
- if (!*opt)
+ if (!*opt)
/* empty option */
continue;
if (parse_one_option(opt, flagp) == 0) {
}
+int read_file(char *path, char *buf, int size)
+{
+ FILE *fd;
+
+ fd = fopen(path, "r");
+ if (fd == NULL)
+ return errno;
+
+ fgets(buf, size, fd);
+ fclose(fd);
+ return 0;
+}
+
+int write_file(char *path, char *buf)
+{
+ FILE *fd;
+
+ fd = fopen(path, "w");
+ if (fd == NULL)
+ return errno;
+
+ fputs(buf, fd);
+ fclose(fd);
+ return 0;
+}
+
+/* This is to tune the kernel for good SCSI performance.
+ * For that we set the value of /sys/block/{dev}/queue/max_sectors_kb
+ * to the value of /sys/block/{dev}/queue/max_hw_sectors_kb */
+int set_tunables(char *source, int src_len)
+{
+ glob_t glob_info;
+ struct stat stat_buf;
+ char *chk_major, *chk_minor;
+ char *savept, *dev, *s2 = 0;
+ char buf[PATH_MAX], path[PATH_MAX];
+ int i, rc = 0;
+ int major, minor;
+
+ if (!source)
+ return -EINVAL;
+
+ if (strncmp(source, "/dev/loop", 9) == 0)
+ return 0;
+
+ if ((*source != '/') && ((s2 = strpbrk(source, ",:")) != NULL))
+ return 0;
+
+ dev = source + src_len - 1;
+ while (dev > source && (*dev != '/')) {
+ if (isdigit(*dev))
+ *dev = 0;
+ dev--;
+ }
+ snprintf(path, sizeof(path), "/sys/block%s/%s", dev,
+ MAX_HW_SECTORS_KB_PATH);
+ rc = read_file(path, buf, sizeof(buf));
+ if (rc == 0 && (strlen(buf) - 1) > 0) {
+ snprintf(path, sizeof(path), "/sys/block%s/%s", dev,
+ MAX_SECTORS_KB_PATH);
+ rc = write_file(path, buf);
+ if (rc && verbose)
+ fprintf(stderr, "warning: opening %s: %s\n",
+ path, strerror(errno));
+ return rc;
+ }
+
+ if (rc != ENOENT)
+ return rc;
+
+ /* The name of the device say 'X' specified in /dev/X may not
+ * match any entry under /sys/block/. In that case we need to
+ * match the major/minor number to find the entry under
+ * sys/block corresponding to /dev/X */
+ dev = source + src_len - 1;
+ while (dev > source) {
+ if (isdigit(*dev))
+ *dev = 0;
+ dev--;
+ }
+
+ rc = stat(dev, &stat_buf);
+ if (rc) {
+ if (verbose)
+ fprintf(stderr, "warning: %s, device %s stat failed\n",
+ strerror(errno), dev);
+ return rc;
+ }
+
+ major = major(stat_buf.st_rdev);
+ minor = minor(stat_buf.st_rdev);
+ rc = glob("/sys/block/*", GLOB_NOSORT, NULL, &glob_info);
+ if (rc) {
+ if (verbose)
+ fprintf(stderr, "warning: failed to read entries under "
+ "/sys/block\n");
+ return rc;
+ }
+
+ for (i = 0; i < glob_info.gl_pathc; i++){
+ snprintf(path, sizeof(path), "%s/dev", glob_info.gl_pathv[i]);
+
+ rc = read_file(path, buf, sizeof(buf));
+ if (rc)
+ continue;
+
+ if (buf[strlen(buf) - 1] == '\n')
+ buf[strlen(buf) - 1] = '\0';
+
+ chk_major = strtok_r(buf, ":", &savept);
+ chk_minor = savept;
+ if (major == atoi(chk_major) &&minor == atoi(chk_minor))
+ break;
+ }
+
+ if (i == glob_info.gl_pathc) {
+ if (verbose)
+ fprintf(stderr,"warning: device %s does not match any "
+ "entry under /sys/block\n", source);
+ return -EINVAL;
+ }
+
+ snprintf(path, sizeof(path), "%s/%s", glob_info.gl_pathv[i],
+ MAX_HW_SECTORS_KB_PATH);
+ rc = read_file(path, buf, sizeof(buf));
+ if (rc) {
+ if (verbose)
+ fprintf(stderr, "warning: opening %s: %s\n",
+ path, strerror(errno));
+ return rc;
+ }
+
+ if (strlen(buf) - 1 > 0) {
+ snprintf(path, sizeof(path), "%s/%s",
+ glob_info.gl_pathv[i], MAX_SECTORS_KB_PATH);
+ rc = write_file(path, buf);
+ if (rc && verbose)
+ fprintf(stderr, "warning: writing to %s: %s\n",
+ path, strerror(errno));
+ }
+ return rc;
+}
+
int main(int argc, char *const argv[])
{
char default_options[] = "";
options = malloc(strlen(orig_options) + 1);
strcpy(options, orig_options);
- rc = parse_options(options, &flags);
+ rc = parse_options(options, &flags);
if (rc) {
fprintf(stderr, "%s: can't parse options: %s\n",
progname, options);
return(ENOENT);
}
}
- if (flags & MS_REMOUNT)
+ if (flags & MS_REMOUNT)
nomtab++;
rc = access(target, F_OK);
strcat(optcopy, "device=");
strcat(optcopy, source);
- if (verbose)
+ if (verbose)
printf("mounting device %s at %s, flags=%#x options=%s\n",
source, target, flags, optcopy);
-
+
+ if (set_tunables(source, strlen(source)) && verbose)
+ fprintf(stderr, "%s: unable to set tunables for %s"
+ " (may cause reduced IO performance)",
+ argv[0], source);
+
if (!fake)
- /* flags and target get to lustre_get_sb, but not
- lustre_fill_super. Lustre ignores the flags, but mount
+ /* flags and target get to lustre_get_sb, but not
+ lustre_fill_super. Lustre ignores the flags, but mount
does not. */
rc = mount(source, target, "lustre", flags, (void *)optcopy);
rc = errno;
cli = strrchr(usource, ':');
- if (cli && (strlen(cli) > 2))
+ if (cli && (strlen(cli) > 2))
cli += 2;
else
cli = NULL;
- fprintf(stderr, "%s: mount %s at %s failed: %s\n", progname,
+ fprintf(stderr, "%s: mount %s at %s failed: %s\n", progname,
usource, target, strerror(errno));
if (errno == ENODEV)
fprintf(stderr, "Are the lustre modules loaded?\n"
if (errno == ENOTBLK)
fprintf(stderr, "Do you need -o loop?\n");
if (errno == ENOMEDIUM)
- fprintf(stderr,
+ fprintf(stderr,
"This filesystem needs at least 1 OST\n");
if (errno == ENOENT) {
fprintf(stderr, "Is the MGS specification correct?\n");
"in use. (%s)\n", usource);
if (errno == EINVAL) {
fprintf(stderr, "This may have multiple causes.\n");
- if (cli)
+ if (cli)
fprintf(stderr, "Is '%s' the correct filesystem"
" name?\n", cli);
fprintf(stderr, "Are the mount options correct?\n");
git://git.whamcloud.com / fs / lustre-release.git / blobdiff