return 0;
}
-int llapi_file_open_pool(const char *name, int flags, int mode,
- unsigned long long stripe_size, int stripe_offset,
- int stripe_count, int stripe_pattern, char *pool_name)
+/**
+ * Open a Lustre file.
+ *
+ * \param name the name of the file to be opened
+ * \param flags access mode, see flags in open(2)
+ * \param mode permisson of the file if it is created, see mode in open(2)
+ * \param param stripe pattern of the newly created file
+ *
+ * \return file descriptor of opened file
+ * \return -error failure
+ */
+int llapi_file_open_param(const char *name, int flags, mode_t mode,
+ const struct llapi_stripe_param *param)
{
- struct lov_user_md_v3 lum = { 0 };
- int fd = -1;
- int rc = 0;
+ char fsname[MAX_OBD_NAME + 1] = { 0 };
+ char *pool_name = param->lsp_pool;
+ struct lov_user_md *lum = NULL;
+ size_t lum_size = sizeof(*lum);
+ int fd, rc;
- /* Make sure we have a good pool */
- if (pool_name != NULL) {
- char fsname[MAX_OBD_NAME + 1], *ptr;
+ /* Make sure we are on a Lustre file system */
+ rc = llapi_search_fsname(name, fsname);
+ if (rc) {
+ llapi_error(LLAPI_MSG_ERROR, rc,
+ "'%s' is not on a Lustre filesystem",
+ name);
+ return rc;
+ }
- rc = llapi_search_fsname(name, fsname);
- if (rc) {
- llapi_error(LLAPI_MSG_ERROR, rc,
- "'%s' is not on a Lustre filesystem",
- name);
- return rc;
- }
+ /* Check if the stripe pattern is sane. */
+ rc = llapi_stripe_limit_check(param->lsp_stripe_size,
+ param->lsp_stripe_offset,
+ param->lsp_stripe_count,
+ param->lsp_stripe_pattern);
+ if (rc != 0)
+ return rc;
- /* in case user gives the full pool name <fsname>.<poolname>,
- * strip the fsname */
- ptr = strchr(pool_name, '.');
- if (ptr != NULL) {
- *ptr = '\0';
- if (strcmp(pool_name, fsname) != 0) {
- *ptr = '.';
- llapi_err_noerrno(LLAPI_MSG_ERROR,
- "Pool '%s' is not on filesystem '%s'",
- pool_name, fsname);
- return -EINVAL;
- }
- pool_name = ptr + 1;
- }
+ /* Make sure we have a good pool */
+ if (pool_name != NULL) {
+ /* in case user gives the full pool name <fsname>.<poolname>,
+ * strip the fsname */
+ char *ptr = strchr(pool_name, '.');
+ if (ptr != NULL) {
+ *ptr = '\0';
+ if (strcmp(pool_name, fsname) != 0) {
+ *ptr = '.';
+ llapi_err_noerrno(LLAPI_MSG_ERROR,
+ "Pool '%s' is not on filesystem '%s'",
+ pool_name, fsname);
+ return -EINVAL;
+ }
+ pool_name = ptr + 1;
+ }
- /* Make sure the pool exists and is non-empty */
- rc = llapi_search_ost(fsname, pool_name, NULL);
- if (rc < 1) {
- llapi_err_noerrno(LLAPI_MSG_ERROR,
- "pool '%s.%s' %s", fsname, pool_name,
- rc == 0 ? "has no OSTs" : "does not exist");
- return -EINVAL;
- }
- }
+ /* Make sure the pool exists and is non-empty */
+ rc = llapi_search_ost(fsname, pool_name, NULL);
+ if (rc < 1) {
+ char *err = rc == 0 ? "has no OSTs" : "does not exist";
- rc = llapi_stripe_limit_check(stripe_size, stripe_offset, stripe_count,
- stripe_pattern);
- if (rc != 0)
- return rc;
+ llapi_err_noerrno(LLAPI_MSG_ERROR, "pool '%s.%s' %s",
+ fsname, pool_name, err);
+ return -EINVAL;
+ }
+
+ lum_size = sizeof(struct lov_user_md_v3);
+ }
+
+ /* sanity check of target list */
+ if (param->lsp_is_specific) {
+ char ostname[MAX_OBD_NAME + 1];
+ bool found = false;
+ int i;
+
+ for (i = 0; i < param->lsp_stripe_count; i++) {
+ snprintf(ostname, sizeof(ostname), "%s-OST%04x_UUID",
+ fsname, param->lsp_osts[i]);
+ rc = llapi_search_ost(fsname, pool_name, ostname);
+ if (rc <= 0) {
+ if (rc == 0)
+ rc = -ENODEV;
+
+ llapi_error(LLAPI_MSG_ERROR, rc,
+ "%s: cannot find OST %s in %s",
+ __func__, ostname,
+ pool_name != NULL ?
+ "pool" : "system");
+ return rc;
+ }
+
+ /* Make sure stripe offset is in OST list. */
+ if (param->lsp_osts[i] == param->lsp_stripe_offset)
+ found = true;
+ }
+ if (!found) {
+ llapi_error(LLAPI_MSG_ERROR, -EINVAL,
+ "%s: stripe offset '%d' is not in the "
+ "target list",
+ __func__, param->lsp_stripe_offset);
+ return -EINVAL;
+ }
+
+ lum_size = lov_user_md_size(param->lsp_stripe_count,
+ LOV_USER_MAGIC_SPECIFIC);
+ }
+
+ lum = calloc(1, lum_size);
+ if (lum == NULL)
+ return -ENOMEM;
retry_open:
fd = open(name, flags | O_LOV_DELAY_CREATE, mode);
}
}
- if (fd < 0) {
- rc = -errno;
- llapi_error(LLAPI_MSG_ERROR, rc, "unable to open '%s'", name);
- return rc;
- }
+ if (fd < 0) {
+ rc = -errno;
+ llapi_error(LLAPI_MSG_ERROR, rc, "unable to open '%s'", name);
+ free(lum);
+ return rc;
+ }
- /* Initialize IOCTL striping pattern structure */
- lum.lmm_magic = LOV_USER_MAGIC_V3;
- lum.lmm_pattern = stripe_pattern;
- lum.lmm_stripe_size = stripe_size;
- lum.lmm_stripe_count = stripe_count;
- lum.lmm_stripe_offset = stripe_offset;
- if (pool_name != NULL) {
- strlcpy(lum.lmm_pool_name, pool_name,
- sizeof(lum.lmm_pool_name));
- } else {
- /* If no pool is specified at all, use V1 request */
- lum.lmm_magic = LOV_USER_MAGIC_V1;
- }
+ /* Initialize IOCTL striping pattern structure */
+ lum->lmm_magic = LOV_USER_MAGIC_V1;
+ lum->lmm_pattern = param->lsp_stripe_pattern;
+ lum->lmm_stripe_size = param->lsp_stripe_size;
+ lum->lmm_stripe_count = param->lsp_stripe_count;
+ lum->lmm_stripe_offset = param->lsp_stripe_offset;
+ if (pool_name != NULL) {
+ struct lov_user_md_v3 *lumv3 = (void *)lum;
- if (ioctl(fd, LL_IOC_LOV_SETSTRIPE, &lum)) {
- char *errmsg = "stripe already set";
- rc = -errno;
- if (errno != EEXIST && errno != EALREADY)
- errmsg = strerror(errno);
+ lumv3->lmm_magic = LOV_USER_MAGIC_V3;
+ strncpy(lumv3->lmm_pool_name, pool_name, LOV_MAXPOOLNAME);
+ }
+ if (param->lsp_is_specific) {
+ struct lov_user_md_v3 *lumv3 = (void *)lum;
+ int i;
+
+ lumv3->lmm_magic = LOV_USER_MAGIC_SPECIFIC;
+ if (pool_name == NULL) {
+ /* LOV_USER_MAGIC_SPECIFIC uses v3 format plus specified
+ * OST list, therefore if pool is not specified we have
+ * to pack a null pool name for placeholder. */
+ memset(lumv3->lmm_pool_name, 0, LOV_MAXPOOLNAME);
+ }
- llapi_err_noerrno(LLAPI_MSG_ERROR,
- "error on ioctl "LPX64" for '%s' (%d): %s",
- (__u64)LL_IOC_LOV_SETSTRIPE, name, fd,errmsg);
- }
+ for (i = 0; i < param->lsp_stripe_count; i++)
+ lumv3->lmm_objects[i].l_ost_idx = param->lsp_osts[i];
+ }
+
+ if (ioctl(fd, LL_IOC_LOV_SETSTRIPE, lum) != 0) {
+ char *errmsg = "stripe already set";
+
+ rc = -errno;
+ if (errno != EEXIST && errno != EALREADY)
+ errmsg = strerror(errno);
+
+ llapi_err_noerrno(LLAPI_MSG_ERROR,
+ "error on ioctl "LPX64" for '%s' (%d): %s",
+ (__u64)LL_IOC_LOV_SETSTRIPE, name, fd,
+ errmsg);
+ }
if (rc) {
close(fd);
fd = rc;
}
-
+ if (lum != NULL)
+ free(lum);
return fd;
}
+int llapi_file_open_pool(const char *name, int flags, int mode,
+ unsigned long long stripe_size, int stripe_offset,
+ int stripe_count, int stripe_pattern, char *pool_name)
+{
+ const struct llapi_stripe_param param = {
+ .lsp_stripe_size = stripe_size,
+ .lsp_stripe_count = stripe_count,
+ .lsp_stripe_pattern = stripe_pattern,
+ .lsp_stripe_offset = stripe_offset,
+ .lsp_pool = pool_name
+ };
+ return llapi_file_open_param(name, flags, mode, ¶m);
+}
+
int llapi_file_open(const char *name, int flags, int mode,
unsigned long long stripe_size, int stripe_offset,
int stripe_count, int stripe_pattern)
git://git.whamcloud.com / fs / lustre-release.git / blobdiff