diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/obdclass/obd_mount.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/obdclass/obd_mount.c | 1245 |
1 files changed, 0 insertions, 1245 deletions
diff --git a/drivers/staging/lustre/lustre/obdclass/obd_mount.c b/drivers/staging/lustre/lustre/obdclass/obd_mount.c deleted file mode 100644 index 06c38fdef7ba..000000000000 --- a/drivers/staging/lustre/lustre/obdclass/obd_mount.c +++ /dev/null @@ -1,1245 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * GPL HEADER START - * - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 only, - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License version 2 for more details (a copy is included - * in the LICENSE file that accompanied this code). - * - * You should have received a copy of the GNU General Public License - * version 2 along with this program; If not, see - * http://www.gnu.org/licenses/gpl-2.0.html - * - * GPL HEADER END - */ -/* - * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2011, 2015, Intel Corporation. - */ -/* - * This file is part of Lustre, http://www.lustre.org/ - * Lustre is a trademark of Sun Microsystems, Inc. - * - * lustre/obdclass/obd_mount.c - * - * Client mount routines - * - * Author: Nathan Rutman <nathan@clusterfs.com> - */ - -#define DEBUG_SUBSYSTEM S_CLASS -#define D_MOUNT (D_SUPER | D_CONFIG/*|D_WARNING */) -#define PRINT_CMD CDEBUG - -#include <linux/random.h> -#include <obd.h> -#include <lustre_compat.h> -#include <obd_class.h> -#include <uapi/linux/lustre/lustre_idl.h> -#include <lustre_log.h> -#include <lustre_disk.h> -#include <uapi/linux/lustre/lustre_param.h> - -static DEFINE_SPINLOCK(client_lock); -static struct module *client_mod; -static int (*client_fill_super)(struct super_block *sb); -static void (*kill_super_cb)(struct super_block *sb); - -/**************** config llog ********************/ - -/** Get a config log from the MGS and process it. - * This func is called for both clients and servers. - * Continue to process new statements appended to the logs - * (whenever the config lock is revoked) until lustre_end_log - * is called. - * @param sb The superblock is used by the MGC to write to the local copy of - * the config log - * @param logname The name of the llog to replicate from the MGS - * @param cfg Since the same mgc may be used to follow multiple config logs - * (e.g. ost1, ost2, client), the config_llog_instance keeps the state for - * this log, and is added to the mgc's list of logs to follow. - */ -int lustre_process_log(struct super_block *sb, char *logname, - struct config_llog_instance *cfg) -{ - struct lustre_cfg *lcfg; - struct lustre_cfg_bufs *bufs; - struct lustre_sb_info *lsi = s2lsi(sb); - struct obd_device *mgc = lsi->lsi_mgc; - int rc; - - LASSERT(mgc); - LASSERT(cfg); - - bufs = kzalloc(sizeof(*bufs), GFP_NOFS); - if (!bufs) - return -ENOMEM; - - /* mgc_process_config */ - lustre_cfg_bufs_reset(bufs, mgc->obd_name); - lustre_cfg_bufs_set_string(bufs, 1, logname); - lustre_cfg_bufs_set(bufs, 2, cfg, sizeof(*cfg)); - lustre_cfg_bufs_set(bufs, 3, &sb, sizeof(sb)); - lcfg = kzalloc(lustre_cfg_len(bufs->lcfg_bufcount, bufs->lcfg_buflen), - GFP_NOFS); - if (!lcfg) { - rc = -ENOMEM; - goto out; - } - lustre_cfg_init(lcfg, LCFG_LOG_START, bufs); - - rc = obd_process_config(mgc, sizeof(*lcfg), lcfg); - kfree(lcfg); -out: - kfree(bufs); - - if (rc == -EINVAL) - LCONSOLE_ERROR_MSG(0x15b, "%s: The configuration from log '%s' failed from the MGS (%d). Make sure this client and the MGS are running compatible versions of Lustre.\n", - mgc->obd_name, logname, rc); - - else if (rc) - LCONSOLE_ERROR_MSG(0x15c, "%s: The configuration from log '%s' failed (%d). This may be the result of communication errors between this node and the MGS, a bad configuration, or other errors. See the syslog for more information.\n", - mgc->obd_name, logname, - rc); - - /* class_obd_list(); */ - return rc; -} -EXPORT_SYMBOL(lustre_process_log); - -/* Stop watching this config log for updates */ -int lustre_end_log(struct super_block *sb, char *logname, - struct config_llog_instance *cfg) -{ - struct lustre_cfg *lcfg; - struct lustre_cfg_bufs bufs; - struct lustre_sb_info *lsi = s2lsi(sb); - struct obd_device *mgc = lsi->lsi_mgc; - int rc; - - if (!mgc) - return -ENOENT; - - /* mgc_process_config */ - lustre_cfg_bufs_reset(&bufs, mgc->obd_name); - lustre_cfg_bufs_set_string(&bufs, 1, logname); - if (cfg) - lustre_cfg_bufs_set(&bufs, 2, cfg, sizeof(*cfg)); - lcfg = kzalloc(lustre_cfg_len(bufs.lcfg_bufcount, bufs.lcfg_buflen), - GFP_NOFS); - if (!lcfg) - return -ENOMEM; - lustre_cfg_init(lcfg, LCFG_LOG_END, &bufs); - - rc = obd_process_config(mgc, sizeof(*lcfg), lcfg); - kfree(lcfg); - return rc; -} -EXPORT_SYMBOL(lustre_end_log); - -/**************** obd start *******************/ - -/** lustre_cfg_bufs are a holdover from 1.4; we can still set these up from - * lctl (and do for echo cli/srv. - */ -static int do_lcfg(char *cfgname, lnet_nid_t nid, int cmd, - char *s1, char *s2, char *s3, char *s4) -{ - struct lustre_cfg_bufs bufs; - struct lustre_cfg *lcfg = NULL; - int rc; - - CDEBUG(D_TRACE, "lcfg %s %#x %s %s %s %s\n", cfgname, - cmd, s1, s2, s3, s4); - - lustre_cfg_bufs_reset(&bufs, cfgname); - if (s1) - lustre_cfg_bufs_set_string(&bufs, 1, s1); - if (s2) - lustre_cfg_bufs_set_string(&bufs, 2, s2); - if (s3) - lustre_cfg_bufs_set_string(&bufs, 3, s3); - if (s4) - lustre_cfg_bufs_set_string(&bufs, 4, s4); - - lcfg = kzalloc(lustre_cfg_len(bufs.lcfg_bufcount, bufs.lcfg_buflen), - GFP_NOFS); - if (!lcfg) - return -ENOMEM; - lustre_cfg_init(lcfg, cmd, &bufs); - lcfg->lcfg_nid = nid; - rc = class_process_config(lcfg); - kfree(lcfg); - return rc; -} - -/** Call class_attach and class_setup. These methods in turn call - * obd type-specific methods. - */ -static int lustre_start_simple(char *obdname, char *type, char *uuid, - char *s1, char *s2, char *s3, char *s4) -{ - int rc; - - CDEBUG(D_MOUNT, "Starting obd %s (typ=%s)\n", obdname, type); - - rc = do_lcfg(obdname, 0, LCFG_ATTACH, type, uuid, NULL, NULL); - if (rc) { - CERROR("%s attach error %d\n", obdname, rc); - return rc; - } - rc = do_lcfg(obdname, 0, LCFG_SETUP, s1, s2, s3, s4); - if (rc) { - CERROR("%s setup error %d\n", obdname, rc); - do_lcfg(obdname, 0, LCFG_DETACH, NULL, NULL, NULL, NULL); - } - return rc; -} - -static DEFINE_MUTEX(mgc_start_lock); - -/** Set up a mgc obd to process startup logs - * - * \param sb [in] super block of the mgc obd - * - * \retval 0 success, otherwise error code - */ -int lustre_start_mgc(struct super_block *sb) -{ - struct obd_connect_data *data = NULL; - struct lustre_sb_info *lsi = s2lsi(sb); - struct obd_device *obd; - struct obd_export *exp; - struct obd_uuid *uuid; - class_uuid_t uuidc; - lnet_nid_t nid; - char nidstr[LNET_NIDSTR_SIZE]; - char *mgcname = NULL, *niduuid = NULL, *mgssec = NULL; - char *ptr; - int rc = 0, i = 0, j; - - LASSERT(lsi->lsi_lmd); - - /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */ - ptr = lsi->lsi_lmd->lmd_dev; - if (class_parse_nid(ptr, &nid, &ptr) == 0) - i++; - if (i == 0) { - CERROR("No valid MGS nids found.\n"); - return -EINVAL; - } - - mutex_lock(&mgc_start_lock); - - libcfs_nid2str_r(nid, nidstr, sizeof(nidstr)); - mgcname = kasprintf(GFP_NOFS, - "%s%s", LUSTRE_MGC_OBDNAME, nidstr); - niduuid = kasprintf(GFP_NOFS, "%s_%x", mgcname, 0); - if (!mgcname || !niduuid) { - rc = -ENOMEM; - goto out_free; - } - - mgssec = lsi->lsi_lmd->lmd_mgssec ? lsi->lsi_lmd->lmd_mgssec : ""; - - data = kzalloc(sizeof(*data), GFP_NOFS); - if (!data) { - rc = -ENOMEM; - goto out_free; - } - - obd = class_name2obd(mgcname); - if (obd && !obd->obd_stopping) { - int recov_bk; - - rc = obd_set_info_async(NULL, obd->obd_self_export, - strlen(KEY_MGSSEC), KEY_MGSSEC, - strlen(mgssec), mgssec, NULL); - if (rc) - goto out_free; - - /* Re-using an existing MGC */ - atomic_inc(&obd->u.cli.cl_mgc_refcount); - - /* IR compatibility check, only for clients */ - if (lmd_is_client(lsi->lsi_lmd)) { - int has_ir; - int vallen = sizeof(*data); - __u32 *flags = &lsi->lsi_lmd->lmd_flags; - - rc = obd_get_info(NULL, obd->obd_self_export, - strlen(KEY_CONN_DATA), KEY_CONN_DATA, - &vallen, data); - LASSERT(rc == 0); - has_ir = OCD_HAS_FLAG(data, IMP_RECOV); - if (has_ir ^ !(*flags & LMD_FLG_NOIR)) { - /* LMD_FLG_NOIR is for test purpose only */ - LCONSOLE_WARN( - "Trying to mount a client with IR setting not compatible with current mgc. Force to use current mgc setting that is IR %s.\n", - has_ir ? "enabled" : "disabled"); - if (has_ir) - *flags &= ~LMD_FLG_NOIR; - else - *flags |= LMD_FLG_NOIR; - } - } - - recov_bk = 0; - - /* Try all connections, but only once (again). - * We don't want to block another target from starting - * (using its local copy of the log), but we do want to connect - * if at all possible. - */ - recov_bk++; - CDEBUG(D_MOUNT, "%s: Set MGC reconnect %d\n", mgcname, - recov_bk); - rc = obd_set_info_async(NULL, obd->obd_self_export, - sizeof(KEY_INIT_RECOV_BACKUP), - KEY_INIT_RECOV_BACKUP, - sizeof(recov_bk), &recov_bk, NULL); - rc = 0; - goto out; - } - - CDEBUG(D_MOUNT, "Start MGC '%s'\n", mgcname); - - /* Add the primary nids for the MGS */ - i = 0; - /* Use nids from mount line: uml1,1@elan:uml2,2@elan:/lustre */ - ptr = lsi->lsi_lmd->lmd_dev; - while (class_parse_nid(ptr, &nid, &ptr) == 0) { - rc = do_lcfg(mgcname, nid, - LCFG_ADD_UUID, niduuid, NULL, NULL, NULL); - if (!rc) - i++; - /* Stop at the first failover nid */ - if (*ptr == ':') - break; - } - if (i == 0) { - CERROR("No valid MGS nids found.\n"); - rc = -EINVAL; - goto out_free; - } - lsi->lsi_lmd->lmd_mgs_failnodes = 1; - - /* Random uuid for MGC allows easier reconnects */ - uuid = kzalloc(sizeof(*uuid), GFP_NOFS); - if (!uuid) { - rc = -ENOMEM; - goto out_free; - } - - ll_generate_random_uuid(uuidc); - class_uuid_unparse(uuidc, uuid); - - /* Start the MGC */ - rc = lustre_start_simple(mgcname, LUSTRE_MGC_NAME, - (char *)uuid->uuid, LUSTRE_MGS_OBDNAME, - niduuid, NULL, NULL); - kfree(uuid); - if (rc) - goto out_free; - - /* Add any failover MGS nids */ - i = 1; - while (ptr && ((*ptr == ':' || - class_find_param(ptr, PARAM_MGSNODE, &ptr) == 0))) { - /* New failover node */ - sprintf(niduuid, "%s_%x", mgcname, i); - j = 0; - while (class_parse_nid_quiet(ptr, &nid, &ptr) == 0) { - rc = do_lcfg(mgcname, nid, LCFG_ADD_UUID, niduuid, - NULL, NULL, NULL); - if (!rc) - ++j; - if (*ptr == ':') - break; - } - if (j > 0) { - rc = do_lcfg(mgcname, 0, LCFG_ADD_CONN, - niduuid, NULL, NULL, NULL); - if (!rc) - i++; - } else { - /* at ":/fsname" */ - break; - } - } - lsi->lsi_lmd->lmd_mgs_failnodes = i; - - obd = class_name2obd(mgcname); - if (!obd) { - CERROR("Can't find mgcobd %s\n", mgcname); - rc = -ENOTCONN; - goto out_free; - } - - rc = obd_set_info_async(NULL, obd->obd_self_export, - strlen(KEY_MGSSEC), KEY_MGSSEC, - strlen(mgssec), mgssec, NULL); - if (rc) - goto out_free; - - /* Keep a refcount of servers/clients who started with "mount", - * so we know when we can get rid of the mgc. - */ - atomic_set(&obd->u.cli.cl_mgc_refcount, 1); - - /* We connect to the MGS at setup, and don't disconnect until cleanup */ - data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_AT | - OBD_CONNECT_FULL20 | OBD_CONNECT_IMP_RECOV | - OBD_CONNECT_LVB_TYPE | OBD_CONNECT_BULK_MBITS; - -#if OBD_OCD_VERSION(3, 0, 53, 0) > LUSTRE_VERSION_CODE - data->ocd_connect_flags |= OBD_CONNECT_MNE_SWAB; -#endif - - if (lmd_is_client(lsi->lsi_lmd) && - lsi->lsi_lmd->lmd_flags & LMD_FLG_NOIR) - data->ocd_connect_flags &= ~OBD_CONNECT_IMP_RECOV; - data->ocd_version = LUSTRE_VERSION_CODE; - rc = obd_connect(NULL, &exp, obd, &obd->obd_uuid, data, NULL); - if (rc) { - CERROR("connect failed %d\n", rc); - goto out; - } - - obd->u.cli.cl_mgc_mgsexp = exp; - -out: - /* Keep the mgc info in the sb. Note that many lsi's can point - * to the same mgc. - */ - lsi->lsi_mgc = obd; -out_free: - mutex_unlock(&mgc_start_lock); - - kfree(data); - kfree(mgcname); - kfree(niduuid); - return rc; -} - -static int lustre_stop_mgc(struct super_block *sb) -{ - struct lustre_sb_info *lsi = s2lsi(sb); - struct obd_device *obd; - char *niduuid = NULL, *ptr = NULL; - int i, rc = 0, len = 0; - - if (!lsi) - return -ENOENT; - obd = lsi->lsi_mgc; - if (!obd) - return -ENOENT; - lsi->lsi_mgc = NULL; - - mutex_lock(&mgc_start_lock); - LASSERT(atomic_read(&obd->u.cli.cl_mgc_refcount) > 0); - if (!atomic_dec_and_test(&obd->u.cli.cl_mgc_refcount)) { - /* This is not fatal, every client that stops - * will call in here. - */ - CDEBUG(D_MOUNT, "mgc still has %d references.\n", - atomic_read(&obd->u.cli.cl_mgc_refcount)); - rc = -EBUSY; - goto out; - } - - /* The MGC has no recoverable data in any case. - * force shutdown set in umount_begin - */ - obd->obd_no_recov = 1; - - if (obd->u.cli.cl_mgc_mgsexp) { - /* An error is not fatal, if we are unable to send the - * disconnect mgs ping evictor cleans up the export - */ - rc = obd_disconnect(obd->u.cli.cl_mgc_mgsexp); - if (rc) - CDEBUG(D_MOUNT, "disconnect failed %d\n", rc); - } - - /* Save the obdname for cleaning the nid uuids, which are obdname_XX */ - len = strlen(obd->obd_name) + 6; - niduuid = kzalloc(len, GFP_NOFS); - if (niduuid) { - strcpy(niduuid, obd->obd_name); - ptr = niduuid + strlen(niduuid); - } - - rc = class_manual_cleanup(obd); - if (rc) - goto out; - - /* Clean the nid uuids */ - if (!niduuid) { - rc = -ENOMEM; - goto out; - } - - for (i = 0; i < lsi->lsi_lmd->lmd_mgs_failnodes; i++) { - sprintf(ptr, "_%x", i); - rc = do_lcfg(LUSTRE_MGC_OBDNAME, 0, LCFG_DEL_UUID, - niduuid, NULL, NULL, NULL); - if (rc) - CERROR("del MDC UUID %s failed: rc = %d\n", - niduuid, rc); - } -out: - kfree(niduuid); - - /* class_import_put will get rid of the additional connections */ - mutex_unlock(&mgc_start_lock); - return rc; -} - -/***************** lustre superblock **************/ - -static struct lustre_sb_info *lustre_init_lsi(struct super_block *sb) -{ - struct lustre_sb_info *lsi; - - lsi = kzalloc(sizeof(*lsi), GFP_NOFS); - if (!lsi) - return NULL; - lsi->lsi_lmd = kzalloc(sizeof(*lsi->lsi_lmd), GFP_NOFS); - if (!lsi->lsi_lmd) { - kfree(lsi); - return NULL; - } - - lsi->lsi_lmd->lmd_exclude_count = 0; - lsi->lsi_lmd->lmd_recovery_time_soft = 0; - lsi->lsi_lmd->lmd_recovery_time_hard = 0; - s2lsi_nocast(sb) = lsi; - /* we take 1 extra ref for our setup */ - atomic_set(&lsi->lsi_mounts, 1); - - /* Default umount style */ - lsi->lsi_flags = LSI_UMOUNT_FAILOVER; - - return lsi; -} - -static int lustre_free_lsi(struct super_block *sb) -{ - struct lustre_sb_info *lsi = s2lsi(sb); - - CDEBUG(D_MOUNT, "Freeing lsi %p\n", lsi); - - /* someone didn't call server_put_mount. */ - LASSERT(atomic_read(&lsi->lsi_mounts) == 0); - - if (lsi->lsi_lmd) { - kfree(lsi->lsi_lmd->lmd_dev); - kfree(lsi->lsi_lmd->lmd_profile); - kfree(lsi->lsi_lmd->lmd_mgssec); - kfree(lsi->lsi_lmd->lmd_opts); - if (lsi->lsi_lmd->lmd_exclude_count) - kfree(lsi->lsi_lmd->lmd_exclude); - kfree(lsi->lsi_lmd->lmd_mgs); - kfree(lsi->lsi_lmd->lmd_osd_type); - kfree(lsi->lsi_lmd->lmd_params); - - kfree(lsi->lsi_lmd); - } - - LASSERT(!lsi->lsi_llsbi); - kfree(lsi); - s2lsi_nocast(sb) = NULL; - - return 0; -} - -/* The lsi has one reference for every server that is using the disk - - * e.g. MDT, MGS, and potentially MGC - */ -static int lustre_put_lsi(struct super_block *sb) -{ - struct lustre_sb_info *lsi = s2lsi(sb); - - CDEBUG(D_MOUNT, "put %p %d\n", sb, atomic_read(&lsi->lsi_mounts)); - if (atomic_dec_and_test(&lsi->lsi_mounts)) { - lustre_free_lsi(sb); - return 1; - } - return 0; -} - -/*** SERVER NAME *** - * <FSNAME><SEPARATOR><TYPE><INDEX> - * FSNAME is between 1 and 8 characters (inclusive). - * Excluded characters are '/' and ':' - * SEPARATOR is either ':' or '-' - * TYPE: "OST", "MDT", etc. - * INDEX: Hex representation of the index - */ - -/** Get the fsname ("lustre") from the server name ("lustre-OST003F"). - * @param [in] svname server name including type and index - * @param [out] fsname Buffer to copy filesystem name prefix into. - * Must have at least 'strlen(fsname) + 1' chars. - * @param [out] endptr if endptr isn't NULL it is set to end of fsname - * rc < 0 on error - */ -static int server_name2fsname(const char *svname, char *fsname, - const char **endptr) -{ - const char *dash; - - dash = svname + strnlen(svname, 8); /* max fsname length is 8 */ - for (; dash > svname && *dash != '-' && *dash != ':'; dash--) - ; - if (dash == svname) - return -EINVAL; - - if (fsname) { - strncpy(fsname, svname, dash - svname); - fsname[dash - svname] = '\0'; - } - - if (endptr) - *endptr = dash; - - return 0; -} - -/* Get the index from the obd name. - * rc = server type, or - * rc < 0 on error - * if endptr isn't NULL it is set to end of name - */ -static int server_name2index(const char *svname, __u32 *idx, - const char **endptr) -{ - unsigned long index; - int rc; - const char *dash; - - /* We use server_name2fsname() just for parsing */ - rc = server_name2fsname(svname, NULL, &dash); - if (rc != 0) - return rc; - - dash++; - - if (strncmp(dash, "MDT", 3) == 0) - rc = LDD_F_SV_TYPE_MDT; - else if (strncmp(dash, "OST", 3) == 0) - rc = LDD_F_SV_TYPE_OST; - else - return -EINVAL; - - dash += 3; - - if (strncmp(dash, "all", 3) == 0) { - if (endptr) - *endptr = dash + 3; - return rc | LDD_F_SV_ALL; - } - - index = simple_strtoul(dash, (char **)endptr, 16); - if (idx) - *idx = index; - - /* Account for -mdc after index that is possible when specifying mdt */ - if (endptr && strncmp(LUSTRE_MDC_NAME, *endptr + 1, - sizeof(LUSTRE_MDC_NAME) - 1) == 0) - *endptr += sizeof(LUSTRE_MDC_NAME); - - return rc; -} - -/*************** mount common between server and client ***************/ - -/* Common umount */ -int lustre_common_put_super(struct super_block *sb) -{ - int rc; - - CDEBUG(D_MOUNT, "dropping sb %p\n", sb); - - /* Drop a ref to the MGC */ - rc = lustre_stop_mgc(sb); - if (rc && (rc != -ENOENT)) { - if (rc != -EBUSY) { - CERROR("Can't stop MGC: %d\n", rc); - return rc; - } - /* BUSY just means that there's some other obd that - * needs the mgc. Let him clean it up. - */ - CDEBUG(D_MOUNT, "MGC still in use\n"); - } - /* Drop a ref to the mounted disk */ - lustre_put_lsi(sb); - return rc; -} -EXPORT_SYMBOL(lustre_common_put_super); - -static void lmd_print(struct lustre_mount_data *lmd) -{ - int i; - - PRINT_CMD(D_MOUNT, " mount data:\n"); - if (lmd_is_client(lmd)) - PRINT_CMD(D_MOUNT, "profile: %s\n", lmd->lmd_profile); - PRINT_CMD(D_MOUNT, "device: %s\n", lmd->lmd_dev); - PRINT_CMD(D_MOUNT, "flags: %x\n", lmd->lmd_flags); - - if (lmd->lmd_opts) - PRINT_CMD(D_MOUNT, "options: %s\n", lmd->lmd_opts); - - if (lmd->lmd_recovery_time_soft) - PRINT_CMD(D_MOUNT, "recovery time soft: %d\n", - lmd->lmd_recovery_time_soft); - - if (lmd->lmd_recovery_time_hard) - PRINT_CMD(D_MOUNT, "recovery time hard: %d\n", - lmd->lmd_recovery_time_hard); - - for (i = 0; i < lmd->lmd_exclude_count; i++) { - PRINT_CMD(D_MOUNT, "exclude %d: OST%04x\n", i, - lmd->lmd_exclude[i]); - } -} - -/* Is this server on the exclusion list */ -int lustre_check_exclusion(struct super_block *sb, char *svname) -{ - struct lustre_sb_info *lsi = s2lsi(sb); - struct lustre_mount_data *lmd = lsi->lsi_lmd; - __u32 index; - int i, rc; - - rc = server_name2index(svname, &index, NULL); - if (rc != LDD_F_SV_TYPE_OST) - /* Only exclude OSTs */ - return 0; - - CDEBUG(D_MOUNT, "Check exclusion %s (%d) in %d of %s\n", svname, - index, lmd->lmd_exclude_count, lmd->lmd_dev); - - for (i = 0; i < lmd->lmd_exclude_count; i++) { - if (index == lmd->lmd_exclude[i]) { - CWARN("Excluding %s (on exclusion list)\n", svname); - return 1; - } - } - return 0; -} - -/* mount -v -o exclude=lustre-OST0001:lustre-OST0002 -t lustre ... */ -static int lmd_make_exclusion(struct lustre_mount_data *lmd, const char *ptr) -{ - const char *s1 = ptr, *s2; - __u32 index = 0, *exclude_list; - int rc = 0, devmax; - - /* The shortest an ost name can be is 8 chars: -OST0000. - * We don't actually know the fsname at this time, so in fact - * a user could specify any fsname. - */ - devmax = strlen(ptr) / 8 + 1; - - /* temp storage until we figure out how many we have */ - exclude_list = kcalloc(devmax, sizeof(index), GFP_NOFS); - if (!exclude_list) - return -ENOMEM; - - /* we enter this fn pointing at the '=' */ - while (*s1 && *s1 != ' ' && *s1 != ',') { - s1++; - rc = server_name2index(s1, &index, &s2); - if (rc < 0) { - CERROR("Can't parse server name '%s': rc = %d\n", - s1, rc); - break; - } - if (rc == LDD_F_SV_TYPE_OST) - exclude_list[lmd->lmd_exclude_count++] = index; - else - CDEBUG(D_MOUNT, "ignoring exclude %.*s: type = %#x\n", - (uint)(s2 - s1), s1, rc); - s1 = s2; - /* now we are pointing at ':' (next exclude) - * or ',' (end of excludes) - */ - if (lmd->lmd_exclude_count >= devmax) - break; - } - if (rc >= 0) /* non-err */ - rc = 0; - - if (lmd->lmd_exclude_count) { - /* permanent, freed in lustre_free_lsi */ - lmd->lmd_exclude = kcalloc(lmd->lmd_exclude_count, - sizeof(index), GFP_NOFS); - if (lmd->lmd_exclude) { - memcpy(lmd->lmd_exclude, exclude_list, - sizeof(index) * lmd->lmd_exclude_count); - } else { - rc = -ENOMEM; - lmd->lmd_exclude_count = 0; - } - } - kfree(exclude_list); - return rc; -} - -static int lmd_parse_mgssec(struct lustre_mount_data *lmd, char *ptr) -{ - char *tail; - int length; - - kfree(lmd->lmd_mgssec); - lmd->lmd_mgssec = NULL; - - tail = strchr(ptr, ','); - if (!tail) - length = strlen(ptr); - else - length = tail - ptr; - - lmd->lmd_mgssec = kzalloc(length + 1, GFP_NOFS); - if (!lmd->lmd_mgssec) - return -ENOMEM; - - memcpy(lmd->lmd_mgssec, ptr, length); - lmd->lmd_mgssec[length] = '\0'; - return 0; -} - -static int lmd_parse_string(char **handle, char *ptr) -{ - char *tail; - int length; - - if (!handle || !ptr) - return -EINVAL; - - kfree(*handle); - *handle = NULL; - - tail = strchr(ptr, ','); - if (!tail) - length = strlen(ptr); - else - length = tail - ptr; - - *handle = kzalloc(length + 1, GFP_NOFS); - if (!*handle) - return -ENOMEM; - - memcpy(*handle, ptr, length); - (*handle)[length] = '\0'; - - return 0; -} - -/* Collect multiple values for mgsnid specifiers */ -static int lmd_parse_mgs(struct lustre_mount_data *lmd, char **ptr) -{ - lnet_nid_t nid; - char *tail = *ptr; - char *mgsnid; - int length; - int oldlen = 0; - - /* Find end of nidlist */ - while (class_parse_nid_quiet(tail, &nid, &tail) == 0) - ; - length = tail - *ptr; - if (length == 0) { - LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", *ptr); - return -EINVAL; - } - - if (lmd->lmd_mgs) - oldlen = strlen(lmd->lmd_mgs) + 1; - - mgsnid = kzalloc(oldlen + length + 1, GFP_NOFS); - if (!mgsnid) - return -ENOMEM; - - if (lmd->lmd_mgs) { - /* Multiple mgsnid= are taken to mean failover locations */ - memcpy(mgsnid, lmd->lmd_mgs, oldlen); - mgsnid[oldlen - 1] = ':'; - kfree(lmd->lmd_mgs); - } - memcpy(mgsnid + oldlen, *ptr, length); - mgsnid[oldlen + length] = '\0'; - lmd->lmd_mgs = mgsnid; - *ptr = tail; - - return 0; -} - -/** Parse mount line options - * e.g. mount -v -t lustre -o abort_recov uml1:uml2:/lustre-client /mnt/lustre - * dev is passed as device=uml1:/lustre by mount.lustre - */ -static int lmd_parse(char *options, struct lustre_mount_data *lmd) -{ - char *s1, *s2, *devname = NULL; - struct lustre_mount_data *raw = (struct lustre_mount_data *)options; - int rc = 0; - - LASSERT(lmd); - if (!options) { - LCONSOLE_ERROR_MSG(0x162, "Missing mount data: check that /sbin/mount.lustre is installed.\n"); - return -EINVAL; - } - - /* Options should be a string - try to detect old lmd data */ - if ((raw->lmd_magic & 0xffffff00) == (LMD_MAGIC & 0xffffff00)) { - LCONSOLE_ERROR_MSG(0x163, "You're using an old version of /sbin/mount.lustre. Please install version %s\n", - LUSTRE_VERSION_STRING); - return -EINVAL; - } - lmd->lmd_magic = LMD_MAGIC; - - lmd->lmd_params = kzalloc(LMD_PARAMS_MAXLEN, GFP_NOFS); - if (!lmd->lmd_params) - return -ENOMEM; - lmd->lmd_params[0] = '\0'; - - /* Set default flags here */ - - s1 = options; - while (*s1) { - int clear = 0; - int time_min = OBD_RECOVERY_TIME_MIN; - char *s3; - - /* Skip whitespace and extra commas */ - while (*s1 == ' ' || *s1 == ',') - s1++; - s3 = s1; - - /* Client options are parsed in ll_options: eg. flock, - * user_xattr, acl - */ - - /* Parse non-ldiskfs options here. Rather than modifying - * ldiskfs, we just zero these out here - */ - if (strncmp(s1, "abort_recov", 11) == 0) { - lmd->lmd_flags |= LMD_FLG_ABORT_RECOV; - clear++; - } else if (strncmp(s1, "recovery_time_soft=", 19) == 0) { - lmd->lmd_recovery_time_soft = max_t(int, - simple_strtoul(s1 + 19, NULL, 10), time_min); - clear++; - } else if (strncmp(s1, "recovery_time_hard=", 19) == 0) { - lmd->lmd_recovery_time_hard = max_t(int, - simple_strtoul(s1 + 19, NULL, 10), time_min); - clear++; - } else if (strncmp(s1, "noir", 4) == 0) { - lmd->lmd_flags |= LMD_FLG_NOIR; /* test purpose only. */ - clear++; - } else if (strncmp(s1, "nosvc", 5) == 0) { - lmd->lmd_flags |= LMD_FLG_NOSVC; - clear++; - } else if (strncmp(s1, "nomgs", 5) == 0) { - lmd->lmd_flags |= LMD_FLG_NOMGS; - clear++; - } else if (strncmp(s1, "noscrub", 7) == 0) { - lmd->lmd_flags |= LMD_FLG_NOSCRUB; - clear++; - } else if (strncmp(s1, PARAM_MGSNODE, - sizeof(PARAM_MGSNODE) - 1) == 0) { - s2 = s1 + sizeof(PARAM_MGSNODE) - 1; - /* Assume the next mount opt is the first - * invalid nid we get to. - */ - rc = lmd_parse_mgs(lmd, &s2); - if (rc) - goto invalid; - clear++; - } else if (strncmp(s1, "writeconf", 9) == 0) { - lmd->lmd_flags |= LMD_FLG_WRITECONF; - clear++; - } else if (strncmp(s1, "update", 6) == 0) { - lmd->lmd_flags |= LMD_FLG_UPDATE; - clear++; - } else if (strncmp(s1, "virgin", 6) == 0) { - lmd->lmd_flags |= LMD_FLG_VIRGIN; - clear++; - } else if (strncmp(s1, "noprimnode", 10) == 0) { - lmd->lmd_flags |= LMD_FLG_NO_PRIMNODE; - clear++; - } else if (strncmp(s1, "mgssec=", 7) == 0) { - rc = lmd_parse_mgssec(lmd, s1 + 7); - if (rc) - goto invalid; - s3 = s2; - clear++; - /* ost exclusion list */ - } else if (strncmp(s1, "exclude=", 8) == 0) { - rc = lmd_make_exclusion(lmd, s1 + 7); - if (rc) - goto invalid; - clear++; - } else if (strncmp(s1, "mgs", 3) == 0) { - /* We are an MGS */ - lmd->lmd_flags |= LMD_FLG_MGS; - clear++; - } else if (strncmp(s1, "svname=", 7) == 0) { - rc = lmd_parse_string(&lmd->lmd_profile, s1 + 7); - if (rc) - goto invalid; - clear++; - } else if (strncmp(s1, "param=", 6) == 0) { - size_t length, params_length; - char *tail = strchr(s1 + 6, ','); - - if (!tail) { - length = strlen(s1); - } else { - lnet_nid_t nid; - char *param_str = tail + 1; - int supplementary = 1; - - while (!class_parse_nid_quiet(param_str, &nid, - ¶m_str)) { - supplementary = 0; - } - length = param_str - s1 - supplementary; - } - length -= 6; - params_length = strlen(lmd->lmd_params); - if (params_length + length + 1 >= LMD_PARAMS_MAXLEN) - return -E2BIG; - strncat(lmd->lmd_params, s1 + 6, length); - lmd->lmd_params[params_length + length] = '\0'; - strlcat(lmd->lmd_params, " ", LMD_PARAMS_MAXLEN); - s3 = s1 + 6 + length; - clear++; - } else if (strncmp(s1, "osd=", 4) == 0) { - rc = lmd_parse_string(&lmd->lmd_osd_type, s1 + 4); - if (rc) - goto invalid; - clear++; - } - /* Linux 2.4 doesn't pass the device, so we stuck it at the - * end of the options. - */ - else if (strncmp(s1, "device=", 7) == 0) { - devname = s1 + 7; - /* terminate options right before device. device - * must be the last one. - */ - *s1 = '\0'; - break; - } - - /* Find next opt */ - s2 = strchr(s1, ','); - if (!s2) { - if (clear) - *s1 = '\0'; - break; - } - s2++; - if (clear) - memmove(s1, s2, strlen(s2) + 1); - else - s1 = s2; - } - - if (!devname) { - LCONSOLE_ERROR_MSG(0x164, "Can't find the device name (need mount option 'device=...')\n"); - goto invalid; - } - - s1 = strstr(devname, ":/"); - if (s1) { - ++s1; - lmd->lmd_flags |= LMD_FLG_CLIENT; - /* Remove leading /s from fsname */ - while (*++s1 == '/') - ; - /* Freed in lustre_free_lsi */ - lmd->lmd_profile = kasprintf(GFP_NOFS, "%s-client", s1); - if (!lmd->lmd_profile) - return -ENOMEM; - } - - /* Freed in lustre_free_lsi */ - lmd->lmd_dev = kzalloc(strlen(devname) + 1, GFP_NOFS); - if (!lmd->lmd_dev) - return -ENOMEM; - strcpy(lmd->lmd_dev, devname); - - /* Save mount options */ - s1 = options + strlen(options) - 1; - while (s1 >= options && (*s1 == ',' || *s1 == ' ')) - *s1-- = 0; - if (*options != 0) { - /* Freed in lustre_free_lsi */ - lmd->lmd_opts = kzalloc(strlen(options) + 1, GFP_NOFS); - if (!lmd->lmd_opts) - return -ENOMEM; - strcpy(lmd->lmd_opts, options); - } - - lmd_print(lmd); - lmd->lmd_magic = LMD_MAGIC; - - return rc; - -invalid: - CERROR("Bad mount options %s\n", options); - return -EINVAL; -} - -/** This is the entry point for the mount call into Lustre. - * This is called when a server or client is mounted, - * and this is where we start setting things up. - * @param data Mount options (e.g. -o flock,abort_recov) - */ -static int lustre_fill_super(struct super_block *sb, void *lmd2_data, int silent) -{ - struct lustre_mount_data *lmd; - struct lustre_sb_info *lsi; - int rc; - - CDEBUG(D_MOUNT | D_VFSTRACE, "VFS Op: sb %p\n", sb); - - lsi = lustre_init_lsi(sb); - if (!lsi) - return -ENOMEM; - lmd = lsi->lsi_lmd; - - /* - * Disable lockdep during mount, because mount locking patterns are - * `special'. - */ - lockdep_off(); - - /* - * LU-639: the obd cleanup of last mount may not finish yet, wait here. - */ - obd_zombie_barrier(); - - /* Figure out the lmd from the mount options */ - if (lmd_parse(lmd2_data, lmd)) { - lustre_put_lsi(sb); - rc = -EINVAL; - goto out; - } - - if (lmd_is_client(lmd)) { - bool have_client = false; - CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile); - if (!client_fill_super) - request_module("lustre"); - spin_lock(&client_lock); - if (client_fill_super && try_module_get(client_mod)) - have_client = true; - spin_unlock(&client_lock); - if (!have_client) { - LCONSOLE_ERROR_MSG(0x165, "Nothing registered for client mount! Is the 'lustre' module loaded?\n"); - lustre_put_lsi(sb); - rc = -ENODEV; - } else { - rc = lustre_start_mgc(sb); - if (rc) { - lustre_common_put_super(sb); - goto out; - } - /* Connect and start */ - /* (should always be ll_fill_super) */ - rc = (*client_fill_super)(sb); - /* c_f_s will call lustre_common_put_super on failure, otherwise - * c_f_s will have taken another reference to the module */ - module_put(client_mod); - } - } else { - CERROR("This is client-side-only module, cannot handle server mount.\n"); - rc = -EINVAL; - } - - /* If error happens in fill_super() call, @lsi will be killed there. - * This is why we do not put it here. - */ - goto out; -out: - if (rc) { - CERROR("Unable to mount %s (%d)\n", - s2lsi(sb) ? lmd->lmd_dev : "", rc); - } else { - CDEBUG(D_SUPER, "Mount %s complete\n", - lmd->lmd_dev); - } - lockdep_on(); - return rc; -} - -/* We can't call ll_fill_super by name because it lives in a module that - * must be loaded after this one. - */ -void lustre_register_super_ops(struct module *mod, - int (*cfs)(struct super_block *sb), - void (*ksc)(struct super_block *sb)) -{ - spin_lock(&client_lock); - client_mod = mod; - client_fill_super = cfs; - kill_super_cb = ksc; - spin_unlock(&client_lock); -} -EXPORT_SYMBOL(lustre_register_super_ops); - -/***************** FS registration ******************/ -static struct dentry *lustre_mount(struct file_system_type *fs_type, int flags, - const char *devname, void *data) -{ - return mount_nodev(fs_type, flags, data, lustre_fill_super); -} - -static void lustre_kill_super(struct super_block *sb) -{ - struct lustre_sb_info *lsi = s2lsi(sb); - - if (kill_super_cb && lsi) - (*kill_super_cb)(sb); - - kill_anon_super(sb); -} - -/** Register the "lustre" fs type - */ -static struct file_system_type lustre_fs_type = { - .owner = THIS_MODULE, - .name = "lustre", - .mount = lustre_mount, - .kill_sb = lustre_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE, -}; -MODULE_ALIAS_FS("lustre"); - -int lustre_register_fs(void) -{ - return register_filesystem(&lustre_fs_type); -} - -int lustre_unregister_fs(void) -{ - return unregister_filesystem(&lustre_fs_type); -} |