/* Given a path, find the corresponding Lustre fsname */
int llapi_search_fsname(const char *pathname, char *fsname)
{
- char *path = (char*)pathname, buf[PATH_MAX + 1];
+ char *path;
+ int rc;
- if (pathname[0] != '/') { /* Need a absolute path */
- memset(buf, '\0', sizeof(buf));
- if (realpath(pathname, buf) == NULL) {
- llapi_err(LLAPI_MSG_ERROR, "pathname '%s' cannot expand",
- pathname);
- return -EINVAL;
+ path = realpath(pathname, NULL);
+ if (path == NULL) {
+ char buf[PATH_MAX + 1], *ptr;
+
+ buf[0] = 0;
+ if (pathname[0] != '/') {
+ /* Need an absolute path, but realpath() only works for
+ * pathnames that actually exist. We go through the
+ * extra hurdle of dirname(getcwd() + pathname) in
+ * case the relative pathname contains ".." in it. */
+ if (getcwd(buf, sizeof(buf) - 1) == NULL)
+ return -errno;
+ strcat(buf, "/");
+ }
+ strncat(buf, pathname, sizeof(buf) - strlen(buf));
+ path = realpath(buf, NULL);
+ if (path == NULL) {
+ ptr = strrchr(buf, '/');
+ if (ptr == NULL)
+ return -ENOENT;
+ *ptr = '\0';
+ path = realpath(buf, NULL);
+ if (path == NULL) {
+ llapi_err(LLAPI_MSG_ERROR,
+ "pathname '%s' cannot expand",
+ pathname);
+ return -errno;
+ }
}
- path = buf;
}
- return get_root_path(WANT_FSNAME | WANT_ERROR, fsname, NULL,
- path, -1);
+ rc = get_root_path(WANT_FSNAME | WANT_ERROR, fsname, NULL, path, -1);
+ free(path);
+ return rc;
}
/* return the first file matching this pattern */
return ret;
}
+/*
+ * Given a filesystem name, or a pathname of a file on a lustre filesystem,
+ * tries to determine the path to the filesystem's clilov directory under /proc
+ *
+ * fsname is limited to MTI_NAME_MAXLEN in lustre_idl.h
+ * The NUL terminator is compensated by the additional "%s" bytes. */
+#define LOV_LEN (sizeof("/proc/fs/lustre/lov/%s-clilov-*") + MTI_NAME_MAXLEN)
+static int clilovpath(const char *fsname, const char *const pathname,
+ char *clilovpath)
+{
+ int rc;
+ char pattern[LOV_LEN];
+ char buffer[PATH_MAX + 1];
+
+ if (fsname == NULL) {
+ if ((rc = llapi_search_fsname(pathname, buffer)) != 0)
+ return rc;
+ fsname = buffer;
+ }
+
+ snprintf(pattern, sizeof(pattern), "/proc/fs/lustre/lov/%s-clilov-*",
+ fsname);
+
+ if ((rc = first_match(pattern, buffer)) != 0)
+ return rc;
+
+ strncpy(clilovpath, buffer, sizeof(buffer));
+
+ return 0;
+}
+
+/*
+ * Given the path to a stripe attribute proc file, tries to open and
+ * read the attribute and return the value using the attr parameter
+ */
+static int sattr_read_attr(const char *const fpath,
+ unsigned int *attr)
+{
+
+ FILE *f;
+ char line[PATH_MAX + 1];
+ int rc = 0;
+
+ if ((f = fopen(fpath, "r")) == NULL) {
+ llapi_err(LLAPI_MSG_ERROR, "Cannot open '%s'", fpath);
+ return errno;
+ }
+
+ if (fgets(line, sizeof(line), f) != NULL) {
+ *attr = atoi(line);
+ } else {
+ llapi_err(LLAPI_MSG_ERROR, "Cannot read from '%s'", fpath);
+ rc = 1;
+ }
+
+ fclose(f);
+ return rc;
+}
+
+/*
+ * Tries to determine the default stripe attributes for a given filesystem. The
+ * filesystem to check should be specified by fsname, or will be determined
+ * using pathname.
+ */
+static int sattr_get_defaults(const char *const fsname,
+ const char *const pathname,
+ unsigned int *scount,
+ unsigned int *ssize,
+ unsigned int *soffset)
+{
+ int rc;
+ char dpath[PATH_MAX + 1];
+ char fpath[PATH_MAX + 1];
+
+ if ((rc = clilovpath(fsname, pathname, dpath)) != 0)
+ return rc;
+
+ if (scount) {
+ snprintf(fpath, PATH_MAX, "%s/stripecount", dpath);
+ if ((rc = sattr_read_attr(fpath, scount)) != 0)
+ return rc;
+ }
+
+ if (ssize) {
+ snprintf(fpath, PATH_MAX, "%s/stripesize", dpath);
+ if ((rc = sattr_read_attr(fpath, ssize)) != 0)
+ return rc;
+ }
+
+ if (soffset) {
+ snprintf(fpath, PATH_MAX, "%s/stripeoffset", dpath);
+ if ((rc = sattr_read_attr(fpath, soffset)) != 0)
+ return rc;
+ }
+
+ return 0;
+}
+
+/*
+ * Tries to gather the default stripe attributes for a given filesystem. If
+ * the attributes can be determined, they are cached for easy retreival the
+ * next time they are needed. Only a single filesystem's attributes are
+ * cached at a time.
+ */
+static int sattr_cache_get_defaults(const char *const fsname,
+ const char *const pathname,
+ unsigned int *scount,
+ unsigned int *ssize,
+ unsigned int *soffset)
+{
+ static struct {
+ char fsname[PATH_MAX + 1];
+ unsigned int stripecount;
+ unsigned int stripesize;
+ unsigned int stripeoffset;
+ } cache = {
+ .fsname = {'\0'}
+ };
+
+ int rc;
+ char fsname_buf[PATH_MAX + 1];
+ unsigned int tmp[3];
+
+ if (fsname == NULL)
+ llapi_search_fsname(pathname, fsname_buf);
+ else
+ strncpy(fsname_buf, fsname, PATH_MAX);
+
+ if (strncmp(fsname_buf, cache.fsname, PATH_MAX) != 0) {
+ /*
+ * Ensure all 3 sattrs (count, size, and offset) are
+ * successfully retrieved and stored in tmp before writing to
+ * cache.
+ */
+ if ((rc = sattr_get_defaults(fsname_buf, NULL, &tmp[0],
+ &tmp[1], &tmp[2])) != 0)
+ return rc;
+
+ cache.stripecount = tmp[0];
+ cache.stripesize = tmp[1];
+ cache.stripeoffset = tmp[2];
+ strncpy(cache.fsname, fsname_buf, PATH_MAX);
+ }
+
+ if (scount)
+ *scount = cache.stripecount;
+ if (ssize)
+ *ssize = cache.stripesize;
+ if (soffset)
+ *soffset = cache.stripeoffset;
+
+ return 0;
+}
+
static void lov_dump_user_lmm_header(struct lov_user_md *lum, char *path,
struct lov_user_ost_data_v1 *objects,
int is_dir, int verbose, int depth,
- char *pool_name)
+ int raw, char *pool_name)
{
char *prefix = is_dir ? "" : "lmm_";
char nl = is_dir ? ' ' : '\n';
if (verbose & ~VERBOSE_COUNT)
llapi_printf(LLAPI_MSG_NORMAL, "%sstripe_count: ",
prefix);
- if (is_dir)
- llapi_printf(LLAPI_MSG_NORMAL, "%d%c",
- lum->lmm_stripe_count ==
- (typeof(lum->lmm_stripe_count))(-1) ? -1 :
- lum->lmm_stripe_count, nl);
- else
+ if (is_dir) {
+ if (!raw && lum->lmm_stripe_count == 0) {
+ unsigned int scount;
+ if (sattr_cache_get_defaults(NULL, path,
+ &scount, NULL,
+ NULL) == 0)
+ llapi_printf(LLAPI_MSG_NORMAL, "%u%c",
+ scount, nl);
+ else
+ llapi_err(LLAPI_MSG_ERROR,
+ "Cannot determine default"
+ " stripe count.");
+ } else {
+ llapi_printf(LLAPI_MSG_NORMAL, "%d%c",
+ lum->lmm_stripe_count ==
+ (typeof(lum->lmm_stripe_count))(-1)
+ ? -1 : lum->lmm_stripe_count, nl);
+ }
+ } else {
llapi_printf(LLAPI_MSG_NORMAL, "%hd%c",
(__s16)lum->lmm_stripe_count, nl);
+ }
}
if (verbose & VERBOSE_SIZE) {
if (verbose & ~VERBOSE_SIZE)
llapi_printf(LLAPI_MSG_NORMAL, "%sstripe_size: ",
prefix);
- llapi_printf(LLAPI_MSG_NORMAL, "%u%c", lum->lmm_stripe_size,
- nl);
+ if (is_dir && !raw && lum->lmm_stripe_size == 0) {
+ unsigned int ssize;
+ if (sattr_cache_get_defaults(NULL, path, NULL, &ssize,
+ NULL) == 0)
+ llapi_printf(LLAPI_MSG_NORMAL, "%u%c", ssize,
+ nl);
+ else
+ llapi_err(LLAPI_MSG_ERROR,
+ "Cannot determine default"
+ " stripe size.");
+ } else {
+ llapi_printf(LLAPI_MSG_NORMAL, "%u%c",
+ lum->lmm_stripe_size, nl);
+ }
}
if ((verbose & VERBOSE_DETAIL) && !is_dir) {
if (verbose & ~VERBOSE_OFFSET)
llapi_printf(LLAPI_MSG_NORMAL, "%sstripe_offset: ",
prefix);
- if (is_dir)
+ if (is_dir)
llapi_printf(LLAPI_MSG_NORMAL, "%d%c",
lum->lmm_stripe_offset ==
(typeof(lum->lmm_stripe_offset))(-1) ? -1 :
void lov_dump_user_lmm_v1v3(struct lov_user_md *lum, char *pool_name,
struct lov_user_ost_data_v1 *objects,
char *path, int is_dir,
- int obdindex, int depth, int header)
+ int obdindex, int depth, int header, int raw)
{
int i, obdstripe = (obdindex != OBD_NOT_FOUND) ? 0 : 1;
}
if (obdstripe == 1)
- lov_dump_user_lmm_header(lum, path, objects, is_dir, header, depth,
- pool_name);
+ lov_dump_user_lmm_header(lum, path, objects, is_dir, header,
+ depth, raw, pool_name);
if (!is_dir && (header & VERBOSE_OBJID)) {
if (obdstripe == 1)
param->lmd->lmd_lmm.lmm_objects,
path, is_dir,
param->obdindex, param->maxdepth,
- param->verbose);
+ param->verbose, param->raw);
break;
case LOV_USER_MAGIC_V3: {
char pool_name[LOV_MAXPOOLNAME + 1];
lov_dump_user_lmm_v1v3(¶m->lmd->lmd_lmm, pool_name,
objects, path, is_dir,
param->obdindex, param->maxdepth,
- param->verbose);
+ param->verbose, param->raw);
break;
}
default:
}
if (ret) {
- if (errno == ENODATA) {
+ if (errno == ENODATA && d != NULL) {
+ /* We need to "fake" the "use the default" values
+ * since the lmm struct is zeroed out at this point.
+ * The magic needs to be set in order to satisfy
+ * a check later on in the code path.
+ * The object_seq needs to be set for the "(Default)"
+ * prefix to be displayed. */
+ struct lov_user_md *lmm = ¶m->lmd->lmd_lmm;
+ lmm->lmm_magic = LOV_MAGIC_V1;
+ if (!param->raw)
+ lmm->lmm_object_seq = LOV_OBJECT_GROUP_DEFAULT;
+ lmm->lmm_stripe_count = 0;
+ lmm->lmm_stripe_size = 0;
+ lmm->lmm_stripe_offset = -1;
+ goto dump;
+
+ } else if (errno == ENODATA && parent != NULL) {
if (!param->obduuid)
llapi_printf(LLAPI_MSG_NORMAL,
"%s has no stripe info\n", path);
return ret;
}
+dump:
if (!param->get_mdt_index)
llapi_lov_dump_user_lmm(param, path, d ? 1 : 0);
*mdtidxp = index;
rc = ioctl(fd, opc, data);
+ if (rc == -1)
+ rc = -errno;
+ else
+ rc = 0;
if (rc && want_error)
llapi_err(LLAPI_MSG_ERROR, "ioctl %d err %d", opc, rc);
/* Take path or fsname */
rc = root_ioctl(device, OBD_IOC_FID2PATH, gf, NULL, 0);
if (rc) {
- llapi_err(LLAPI_MSG_ERROR, "ioctl err %d", rc);
+ if (rc != -ENOENT)
+ llapi_err(LLAPI_MSG_ERROR, "ioctl err %d", rc);
} else {
memcpy(buf, gf->gf_path, gf->gf_pathlen);
*recno = gf->gf_recno;
git://git.whamcloud.com / fs / lustre-release.git / blobdiff