+static int lprocfs_rd_sec_level(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ struct obd_device *obd = data;
+ struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+
+ return snprintf(page, count, "%d\n", mdt->mdt_sec_level);
+}
+
+static int lprocfs_wr_sec_level(struct file *file, const char *buffer,
+ unsigned long count, void *data)
+{
+ struct obd_device *obd = data;
+ struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+ int val, rc;
+
+ rc = lprocfs_write_helper(buffer, count, &val);
+ if (rc)
+ return rc;
+
+ if (val > LUSTRE_SEC_ALL || val < LUSTRE_SEC_NONE)
+ return -EINVAL;
+
+ if (val == LUSTRE_SEC_SPECIFY) {
+ CWARN("security level %d will be supported in future.\n",
+ LUSTRE_SEC_SPECIFY);
+ return -EINVAL;
+ }
+
+ mdt->mdt_sec_level = val;
+ return count;
+}
+
+static int lprocfs_rd_cos(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ struct obd_device *obd = data;
+ struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+
+ return snprintf(page, count, "%u\n", mdt_cos_is_enabled(mdt));
+}
+
+static int lprocfs_wr_cos(struct file *file, const char *buffer,
+ unsigned long count, void *data)
+{
+ struct obd_device *obd = data;
+ struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+ int val, rc;
+
+ rc = lprocfs_write_helper(buffer, count, &val);
+ if (rc)
+ return rc;
+ mdt_enable_cos(mdt, val);
+ return count;
+}
+
+static int lprocfs_rd_root_squash(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ struct obd_device *obd = data;
+ struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+ ENTRY;
+
+ return snprintf(page, count, "%u:%u\n", mdt->mdt_squash_uid,
+ mdt->mdt_squash_gid);
+}
+
+static int safe_strtoul(const char *str, char **endp, unsigned long *res)
+{
+ char n[24];
+
+ *res = simple_strtoul(str, endp, 0);
+ if (str == *endp)
+ return 1;
+
+ sprintf(n, "%lu", *res);
+ if (strncmp(n, str, *endp - str))
+ /* overflow */
+ return 1;
+ return 0;
+}
+
+static int lprocfs_wr_root_squash(struct file *file, const char *buffer,
+ unsigned long count, void *data)
+{
+ struct obd_device *obd = data;
+ struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+ int rc;
+ char kernbuf[50], *tmp, *end, *errmsg;
+ unsigned long uid, gid;
+ int nouid, nogid;
+ ENTRY;
+
+ if (count >= sizeof(kernbuf)) {
+ errmsg = "string too long";
+ GOTO(failed, rc = -EINVAL);
+ }
+ if (cfs_copy_from_user(kernbuf, buffer, count)) {
+ errmsg = "bad address";
+ GOTO(failed, rc = -EFAULT);
+ }
+ kernbuf[count] = '\0';
+
+ nouid = nogid = 0;
+ if (safe_strtoul(buffer, &tmp, &uid)) {
+ uid = mdt->mdt_squash_uid;
+ nouid = 1;
+ }
+
+ /* skip ':' */
+ if (*tmp == ':') {
+ tmp++;
+ if (safe_strtoul(tmp, &end, &gid)) {
+ gid = mdt->mdt_squash_gid;
+ nogid = 1;
+ }
+ } else {
+ gid = mdt->mdt_squash_gid;
+ nogid = 1;
+ }
+
+ mdt->mdt_squash_uid = uid;
+ mdt->mdt_squash_gid = gid;
+
+ if (nouid && nogid) {
+ errmsg = "needs uid:gid format";
+ GOTO(failed, rc = -EINVAL);
+ }
+
+ LCONSOLE_INFO("%s: root_squash is set to %u:%u\n",
+ obd->obd_name,
+ mdt->mdt_squash_uid, mdt->mdt_squash_gid);
+ RETURN(count);
+
+ failed:
+ CWARN("%s: failed to set root_squash to \"%s\", %s: rc %d\n",
+ obd->obd_name, buffer, errmsg, rc);
+ RETURN(rc);
+}
+
+static int lprocfs_rd_nosquash_nids(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ struct obd_device *obd = data;
+ struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+
+ if (mdt->mdt_nosquash_str)
+ return snprintf(page, count, "%s\n", mdt->mdt_nosquash_str);
+ return snprintf(page, count, "NONE\n");
+}
+
+static int lprocfs_wr_nosquash_nids(struct file *file, const char *buffer,
+ unsigned long count, void *data)
+{
+ struct obd_device *obd = data;
+ struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+ int rc;
+ char *kernbuf, *errmsg;
+ cfs_list_t tmp;
+ ENTRY;
+
+ OBD_ALLOC(kernbuf, count + 1);
+ if (kernbuf == NULL) {
+ errmsg = "no memory";
+ GOTO(failed, rc = -ENOMEM);
+ }
+ if (cfs_copy_from_user(kernbuf, buffer, count)) {
+ errmsg = "bad address";
+ GOTO(failed, rc = -EFAULT);
+ }
+ kernbuf[count] = '\0';
+
+ if (!strcmp(kernbuf, "NONE") || !strcmp(kernbuf, "clear")) {
+ /* empty string is special case */
+ cfs_down_write(&mdt->mdt_squash_sem);
+ if (!cfs_list_empty(&mdt->mdt_nosquash_nids)) {
+ cfs_free_nidlist(&mdt->mdt_nosquash_nids);
+ OBD_FREE(mdt->mdt_nosquash_str,
+ mdt->mdt_nosquash_strlen);
+ mdt->mdt_nosquash_str = NULL;
+ mdt->mdt_nosquash_strlen = 0;
+ }
+ cfs_up_write(&mdt->mdt_squash_sem);
+ LCONSOLE_INFO("%s: nosquash_nids is cleared\n",
+ obd->obd_name);
+ OBD_FREE(kernbuf, count + 1);
+ RETURN(count);
+ }
+
+ CFS_INIT_LIST_HEAD(&tmp);
+ if (cfs_parse_nidlist(kernbuf, count, &tmp) <= 0) {
+ errmsg = "can't parse";
+ GOTO(failed, rc = -EINVAL);
+ }
+
+ cfs_down_write(&mdt->mdt_squash_sem);
+ if (!cfs_list_empty(&mdt->mdt_nosquash_nids)) {
+ cfs_free_nidlist(&mdt->mdt_nosquash_nids);
+ OBD_FREE(mdt->mdt_nosquash_str, mdt->mdt_nosquash_strlen);
+ }
+ mdt->mdt_nosquash_str = kernbuf;
+ mdt->mdt_nosquash_strlen = count + 1;
+ cfs_list_splice(&tmp, &mdt->mdt_nosquash_nids);
+
+ LCONSOLE_INFO("%s: nosquash_nids is set to %s\n",
+ obd->obd_name, kernbuf);
+ cfs_up_write(&mdt->mdt_squash_sem);
+ RETURN(count);
+
+ failed:
+ CWARN("%s: failed to set nosquash_nids to \"%s\", %s: rc %d\n",
+ obd->obd_name, kernbuf, errmsg, rc);
+ if (kernbuf)
+ OBD_FREE(kernbuf, count + 1);
+ RETURN(rc);
+}
+
+static int lprocfs_rd_mdt_som(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ struct obd_device *obd = data;
+ struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+
+ return snprintf(page, count, "%sabled\n",
+ mdt->mdt_som_conf ? "en" : "dis");
+}
+
+static int lprocfs_wr_mdt_som(struct file *file, const char *buffer,
+ unsigned long count, void *data)
+{
+ struct obd_export *exp;
+ struct obd_device *obd = data;
+ struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
+ char kernbuf[16];
+ unsigned long val = 0;
+
+ if (count > (sizeof(kernbuf) - 1))
+ return -EINVAL;
+
+ if (cfs_copy_from_user(kernbuf, buffer, count))
+ return -EFAULT;
+
+ kernbuf[count] = '\0';
+
+ if (!strcmp(kernbuf, "enabled"))
+ val = 1;
+ else if (strcmp(kernbuf, "disabled"))
+ return -EINVAL;
+
+ if (mdt->mdt_som_conf == val)
+ return count;
+
+ if (!obd->obd_process_conf) {
+ CERROR("Temporary SOM change is not supported, use lctl "
+ "conf_param for permanent setting\n");
+ return count;
+ }
+
+ /* 1 stands for self export. */
+ cfs_list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain) {
+ if (exp == obd->obd_self_export)
+ continue;
+ if (exp->exp_connect_flags & OBD_CONNECT_MDS_MDS)
+ continue;
+ /* Some clients are already connected, skip the change */
+ LCONSOLE_INFO("%s is already connected, SOM will be %s on "
+ "the next mount\n", exp->exp_client_uuid.uuid,
+ val ? "enabled" : "disabled");
+ return count;
+ }
+
+ mdt->mdt_som_conf = val;
+ LCONSOLE_INFO("Enabling SOM\n");
+
+ return count;
+}
+
+/* Temporary; for testing purposes only */
+static int lprocfs_mdt_wr_mdc(struct file *file, const char *buffer,
+ unsigned long count, void *data)
+{
+ struct obd_device *obd = data;
+ struct obd_export *exp = NULL;
+ struct obd_uuid uuid;
+ char tmpbuf[sizeof(struct obd_uuid)];
+
+ sscanf(buffer, "%40s", tmpbuf);
+
+ obd_str2uuid(&uuid, tmpbuf);
+ exp = cfs_hash_lookup(obd->obd_uuid_hash, &uuid);
+ if (exp == NULL) {
+ CERROR("%s: no export %s found\n",
+ obd->obd_name, obd_uuid2str(&uuid));
+ } else {
+ mdt_hsm_copytool_send(exp);
+ class_export_put(exp);
+ }
+
+ return count;
+}
+