/* * 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) 2009, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. * * Copyright (c) 2012, 2017, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ * Lustre is a trademark of Sun Microsystems, Inc. * * lustre/ofd/ofd_obd.c * * This file contains OBD API methods for OBD Filter Device (OFD) which are * used for export handling, configuration purposes and recovery. * Several methods are used by ECHO client only since it still uses OBD API. * Such methods have _echo_ prefix in name. * * Author: Andreas Dilger * Author: Alexey Zhuravlev * Author: Mikhail Pershin */ #define DEBUG_SUBSYSTEM S_FILTER #include "ofd_internal.h" #include #include #include #include #include /** * Initialize OFD per-export statistics. * * This function sets up procfs entries for various OFD export counters. These * counters are for per-client statistics tracked on the server. * * \param[in] ofd OFD device * \param[in] exp OBD export * \param[in] client_nid NID of client * * \retval 0 if successful * \retval negative value on error */ static int ofd_export_stats_init(struct ofd_device *ofd, struct obd_export *exp, lnet_nid_t *client_nid) { struct obd_device *obd = ofd_obd(ofd); struct nid_stat *stats; int rc; ENTRY; if (obd_uuid_equals(&exp->exp_client_uuid, &obd->obd_uuid)) /* Self-export gets no proc entry */ RETURN(0); rc = lprocfs_exp_setup(exp, client_nid); if (rc != 0) /* Mask error for already created /proc entries */ RETURN(rc == -EALREADY ? 0 : rc); stats = exp->exp_nid_stats; stats->nid_stats = lprocfs_alloc_stats(LPROC_OFD_STATS_LAST, LPROCFS_STATS_FLAG_NOPERCPU); if (!stats->nid_stats) RETURN(-ENOMEM); ofd_stats_counter_init(stats->nid_stats); rc = lprocfs_register_stats(stats->nid_proc, "stats", stats->nid_stats); if (rc != 0) { lprocfs_free_stats(&stats->nid_stats); GOTO(out, rc); } rc = lprocfs_nid_ldlm_stats_init(stats); if (rc != 0) GOTO(out, rc); out: RETURN(rc); } /** * Decide which checksums both client and OST support, possibly forcing * the use of T10PI checksums if the hardware supports this. * * The clients that have no T10-PI RPC checksum support will use the same * mechanism to select checksum type as before, and will not be affected by * the following logic. * * For the clients that have T10-PI RPC checksum support: * * If the OST supports T10-PI feature and T10-PI checksum is enforced, clients * will have no other choice for RPC checksum type other than using the T10PI * checksum type. This is useful for enforcing end-to-end integrity in the * whole system. * * If the OST doesn't support T10-PI feature and T10-PI checksum is enforced, * together with other checksum with reasonably good speeds (e.g. crc32, * crc32c, adler, etc.), all T10-PI checksum types understood by the client * (t10ip512, t10ip4K, t10crc512, t10crc4K) will be added to the available * checksum types, regardless of the speeds of T10-PI checksums. This is * useful for testing T10-PI checksum of RPC. * * If the OST supports T10-PI feature and T10-PI checksum is NOT enforced, * the corresponding T10-PI checksum type will be added to the checksum type * list, regardless of the speed of the T10-PI checksum. This provides clients * the flexibility to choose whether to enable end-to-end integrity or not. * * If the OST does NOT supports T10-PI feature and T10-PI checksum is NOT * enforced, together with other checksums with reasonably good speeds, * all the T10-PI checksum types with good speeds will be added into the * checksum type list. Note that a T10-PI checksum type with a speed worse * than half of Alder will NOT be added as a option. In this circumstance, * T10-PI checksum types has the same behavior like other normal checksum * types. * */ static void ofd_mask_cksum_types(struct ofd_device *ofd, enum cksum_types *cksum_types) { bool enforce = ofd->ofd_checksum_t10pi_enforce; enum cksum_types ofd_t10_cksum_type; enum cksum_types client_t10_types = *cksum_types & OBD_CKSUM_T10_ALL; enum cksum_types server_t10_types; /* * The client set in ocd_cksum_types the checksum types it * supports. We have to mask off the algorithms that we don't * support. T10PI checksum types will be added later. */ *cksum_types &= (ofd->ofd_cksum_types_supported & ~OBD_CKSUM_T10_ALL); server_t10_types = ofd->ofd_cksum_types_supported & OBD_CKSUM_T10_ALL; ofd_t10_cksum_type = ofd->ofd_lut.lut_dt_conf.ddp_t10_cksum_type; /* Quick exit if no T10-PI support on client */ if (!client_t10_types) return; /* * This OST has NO T10-PI feature. Add all supported T10-PI checksums * as options if T10-PI checksum is enforced. If the T10-PI checksum is * not enforced, only add them as options when speed is good. */ if (ofd_t10_cksum_type == 0) { /* * Server allows all T10PI checksums, and server_t10_types * include quick ones. */ if (enforce) *cksum_types |= client_t10_types; else *cksum_types |= client_t10_types & server_t10_types; return; } /* * This OST has T10-PI feature. Disable all other checksum types if * T10-PI checksum is enforced. If the T10-PI checksum is not enforced, * add the checksum type as an option. */ if (client_t10_types & ofd_t10_cksum_type) { if (enforce) *cksum_types = ofd_t10_cksum_type; else *cksum_types |= ofd_t10_cksum_type; } } /** * Match client and OST server connection feature flags. * * Compute the compatibility flags for a connection request based on * features mutually supported by client and server. * * The obd_export::exp_connect_data.ocd_connect_flags field in \a exp * must not be updated here, otherwise a partially initialized value may * be exposed. After the connection request is successfully processed, * the top-level tgt_connect() request handler atomically updates the export * connect flags from the obd_connect_data::ocd_connect_flags field of the * reply. \see tgt_connect(). * * Before 2.7.50 clients will send a struct obd_connect_data_v1 rather than a * full struct obd_connect_data. So care must be taken when accessing fields * that are not present in struct obd_connect_data_v1. See LU-16. * * \param[in] env execution environment * \param[in] exp the obd_export associated with this * client/target pair * \param[in] data stores data for this connect request * \param[in] new_connection is this connection new or not * * \retval 0 if success * \retval -EPROTO client and server feature requirements are * incompatible * \retval -EBADF OST index in connect request doesn't match * real OST index */ static int ofd_parse_connect_data(const struct lu_env *env, struct obd_export *exp, struct obd_connect_data *data, bool new_connection) { struct ofd_device *ofd = ofd_exp(exp); struct filter_export_data *fed = &exp->exp_filter_data; if (!data) RETURN(0); CDEBUG(D_RPCTRACE, "%s: cli %s/%p ocd_connect_flags: %#llx ocd_version: %x ocd_grant: %d ocd_index: %u ocd_group %u\n", exp->exp_obd->obd_name, exp->exp_client_uuid.uuid, exp, data->ocd_connect_flags, data->ocd_version, data->ocd_grant, data->ocd_index, data->ocd_group); if (fed->fed_group != 0 && fed->fed_group != data->ocd_group) { CWARN("!!! This export (nid %s) used object group %d earlier; now it's trying to use group %d! This could be a bug in the MDS. Please report to https://jira.whamcloud.com/\n", obd_export_nid2str(exp), fed->fed_group, data->ocd_group); RETURN(-EPROTO); } fed->fed_group = data->ocd_group; data->ocd_connect_flags &= OST_CONNECT_SUPPORTED; if (data->ocd_connect_flags & OBD_CONNECT_FLAGS2) data->ocd_connect_flags2 &= OST_CONNECT_SUPPORTED2; /* Kindly make sure the SKIP_ORPHAN flag is from MDS. */ if (data->ocd_connect_flags & OBD_CONNECT_MDS) CDEBUG(D_HA, "%s: Received MDS connection for group %u\n", exp->exp_obd->obd_name, data->ocd_group); else if (data->ocd_connect_flags & OBD_CONNECT_SKIP_ORPHAN) RETURN(-EPROTO); /* Determine optimal brw size before calculating grant */ if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_SIZE)) { data->ocd_brw_size = 65536; } else if (OCD_HAS_FLAG(data, BRW_SIZE)) { if (data->ocd_brw_size > ofd->ofd_brw_size) data->ocd_brw_size = ofd->ofd_brw_size; if (data->ocd_brw_size == 0) { CERROR("%s: cli %s/%p ocd_connect_flags: %#llx ocd_version: %x ocd_grant: %d ocd_index: %u ocd_brw_size is unexpectedly zero, network data corruption? Refusing connection of this client\n", exp->exp_obd->obd_name, exp->exp_client_uuid.uuid, exp, data->ocd_connect_flags, data->ocd_version, data->ocd_grant, data->ocd_index); RETURN(-EPROTO); } } if (OCD_HAS_FLAG(data, GRANT_PARAM)) { struct dt_device_param *ddp = &ofd->ofd_lut.lut_dt_conf; /* client is reporting its page size, for future use */ exp->exp_target_data.ted_pagebits = data->ocd_grant_blkbits; data->ocd_grant_blkbits = ofd->ofd_lut.lut_tgd.tgd_blockbits; /* * ddp_inodespace may not be power-of-two value, eg. for ldiskfs * it's LDISKFS_DIR_REC_LEN(20) = 28. */ data->ocd_grant_inobits = fls(ddp->ddp_inodespace - 1); /* ocd_grant_tax_kb is in 1K byte blocks */ data->ocd_grant_tax_kb = ddp->ddp_extent_tax >> 10; data->ocd_grant_max_blks = ddp->ddp_max_extent_blks; } /* * Save connect_data we have so far because tgt_grant_connect() * uses it to calculate grant, and we want to save the client * version before it is overwritten by LUSTRE_VERSION_CODE. */ exp->exp_connect_data = *data; if (OCD_HAS_FLAG(data, GRANT)) tgt_grant_connect(env, exp, data, new_connection); if (data->ocd_connect_flags & OBD_CONNECT_INDEX) { struct lr_server_data *lsd = &ofd->ofd_lut.lut_lsd; int index = lsd->lsd_osd_index; if (index != data->ocd_index) { LCONSOLE_ERROR_MSG(0x136, "Connection from %s to index %u doesn't match actual OST index %u in last_rcvd file, bad configuration?\n", obd_export_nid2str(exp), index, data->ocd_index); RETURN(-EBADF); } if (!(lsd->lsd_feature_compat & OBD_COMPAT_OST)) { /* this will only happen on the first connect */ lsd->lsd_feature_compat |= OBD_COMPAT_OST; /* * sync is not needed here as tgt_client_new will * set exp_need_sync flag */ tgt_server_data_update(env, &ofd->ofd_lut, 0); } } if (data->ocd_connect_flags & OBD_CONNECT_CKSUM) { __u32 cksum_types = data->ocd_cksum_types; ofd_mask_cksum_types(ofd, &data->ocd_cksum_types); if (unlikely(data->ocd_cksum_types == 0)) { CERROR("%s: Connect with checksum support but no ocd_cksum_types is set\n", exp->exp_obd->obd_name); RETURN(-EPROTO); } CDEBUG(D_RPCTRACE, "%s: cli %s supports cksum type %x, return %x\n", exp->exp_obd->obd_name, obd_export_nid2str(exp), cksum_types, data->ocd_cksum_types); } else { /* * This client does not support OBD_CONNECT_CKSUM. * Report failure to negotiate checksum at connect */ CDEBUG(D_RPCTRACE, "%s: cli %s does not support OBD_CONNECT_CKSUM\n", exp->exp_obd->obd_name, obd_export_nid2str(exp)); } if (data->ocd_connect_flags & OBD_CONNECT_MAXBYTES) data->ocd_maxbytes = ofd->ofd_lut.lut_dt_conf.ddp_maxbytes; data->ocd_version = LUSTRE_VERSION_CODE; if (OCD_HAS_FLAG(data, PINGLESS)) { if (ptlrpc_pinger_suppress_pings()) { spin_lock(&exp->exp_obd->obd_dev_lock); list_del_init(&exp->exp_obd_chain_timed); spin_unlock(&exp->exp_obd->obd_dev_lock); } else { data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS; } } RETURN(0); } /** * Re-initialize export upon client reconnection. * * This function parses connection data from reconnect and resets * export statistics. * * \param[in] env execution environment * \param[in] exp OBD export * \param[in] obd OFD device * \param[in] cluuid NID of client * \param[in] data connection data from request * \param[in] localdata client NID * * \retval 0 if successful * \retval negative value on error */ static int ofd_obd_reconnect(const struct lu_env *env, struct obd_export *exp, struct obd_device *obd, struct obd_uuid *cluuid, struct obd_connect_data *data, void *client_nid) { struct ofd_device *ofd; int rc; ENTRY; if (!exp || !obd || !cluuid) RETURN(-EINVAL); rc = nodemap_add_member(*(lnet_nid_t *)client_nid, exp); if (rc != 0 && rc != -EEXIST) RETURN(rc); ofd = ofd_dev(obd->obd_lu_dev); rc = ofd_parse_connect_data(env, exp, data, false); if (rc == 0) ofd_export_stats_init(ofd, exp, client_nid); else nodemap_del_member(exp); RETURN(rc); } /** * Initialize new client connection. * * This function handles new connection to the OFD. The new export is * created (in context of class_connect()) and persistent client data is * initialized on storage. * * \param[in] env execution environment * \param[out] _exp stores pointer to new export * \param[in] obd OFD device * \param[in] cluuid client UUID * \param[in] data connection data from request * \param[in] localdata client NID * * \retval 0 if successful * \retval negative value on error */ static int ofd_obd_connect(const struct lu_env *env, struct obd_export **_exp, struct obd_device *obd, struct obd_uuid *cluuid, struct obd_connect_data *data, void *localdata) { struct obd_export *exp; struct ofd_device *ofd; struct lustre_handle conn = { 0 }; int rc; ENTRY; if (!_exp || !obd || !cluuid) RETURN(-EINVAL); ofd = ofd_dev(obd->obd_lu_dev); rc = class_connect(&conn, obd, cluuid); if (rc) RETURN(rc); exp = class_conn2export(&conn); LASSERT(exp != NULL); if (localdata) { rc = nodemap_add_member(*(lnet_nid_t *)localdata, exp); if (rc != 0 && rc != -EEXIST) GOTO(out, rc); } else { CDEBUG(D_HA, "%s: cannot find nodemap for client %s: nid is null\n", obd->obd_name, cluuid->uuid); } rc = ofd_parse_connect_data(env, exp, data, true); if (rc) GOTO(out, rc); if (obd->obd_replayable) { struct tg_export_data *ted = &exp->exp_target_data; memcpy(ted->ted_lcd->lcd_uuid, cluuid, sizeof(ted->ted_lcd->lcd_uuid)); rc = tgt_client_new(env, exp); if (rc != 0) GOTO(out, rc); ofd_export_stats_init(ofd, exp, localdata); } CDEBUG(D_HA, "%s: get connection from MDS %d\n", obd->obd_name, data ? data->ocd_group : -1); out: if (rc != 0) { class_disconnect(exp); nodemap_del_member(exp); *_exp = NULL; } else { *_exp = exp; } RETURN(rc); } /** * Disconnect a connected client. * * This function terminates the client connection. The client export is * disconnected (cleaned up) and client data on persistent storage is removed. * * \param[in] exp OBD export * * \retval 0 if successful * \retval negative value on error */ int ofd_obd_disconnect(struct obd_export *exp) { struct ofd_device *ofd = ofd_exp(exp); struct lu_env env; int rc; ENTRY; LASSERT(exp); class_export_get(exp); if (!(exp->exp_flags & OBD_OPT_FORCE)) tgt_grant_sanity_check(ofd_obd(ofd), __func__); rc = server_disconnect_export(exp); tgt_grant_discard(exp); /* Do not erase record for recoverable client. */ if (exp->exp_obd->obd_replayable && (!exp->exp_obd->obd_fail || exp->exp_failed)) { rc = lu_env_init(&env, LCT_DT_THREAD); if (rc) GOTO(out, rc); tgt_client_del(&env, exp); lu_env_fini(&env); } out: nodemap_del_member(exp); class_export_put(exp); RETURN(rc); } /** * Implementation of obd_ops::o_init_export. * * This function is called from class_new_export() and initializes * the OFD-specific data for new export. * * \param[in] exp OBD export * * \retval 0 if successful * \retval negative value on error */ static int ofd_init_export(struct obd_export *exp) { int rc; atomic_set(&exp->exp_filter_data.fed_soft_sync_count, 0); spin_lock(&exp->exp_lock); exp->exp_connecting = 1; spin_unlock(&exp->exp_lock); /* self-export doesn't need client data and ldlm initialization */ if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid, &exp->exp_client_uuid))) return 0; rc = tgt_client_alloc(exp); if (rc == 0) ldlm_init_export(exp); if (rc) CERROR("%s: Can't initialize export: rc %d\n", exp->exp_obd->obd_name, rc); return rc; } /** * Implementation of obd_ops::o_destroy_export. * * This function is called from class_export_destroy() to cleanup * the OFD-specific data for export being destroyed. * * \param[in] exp OBD export * * \retval 0 if successful * \retval negative value on error */ static int ofd_destroy_export(struct obd_export *exp) { struct ofd_device *ofd = ofd_exp(exp); if (exp->exp_target_data.ted_pending) CERROR("%s: cli %s/%p has %lu pending on destroyed export\n", exp->exp_obd->obd_name, exp->exp_client_uuid.uuid, exp, exp->exp_target_data.ted_pending); target_destroy_export(exp); if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid, &exp->exp_client_uuid))) return 0; ldlm_destroy_export(exp); tgt_client_free(exp); /* * discard grants once we're sure no more * interaction with the client is possible */ tgt_grant_discard(exp); if (exp_connect_flags(exp) & OBD_CONNECT_GRANT) ofd->ofd_lut.lut_tgd.tgd_tot_granted_clients--; if (!(exp->exp_flags & OBD_OPT_FORCE)) tgt_grant_sanity_check(exp->exp_obd, __func__); return 0; } /** * Notify all devices in server stack about recovery completion. * * This function calls ldo_recovery_complete() for all lower devices in the * server stack so they will be prepared for normal operations. * * \param[in] env execution environment * \param[in] ofd OFD device * * \retval 0 if successful * \retval negative value on error */ int ofd_postrecov(const struct lu_env *env, struct ofd_device *ofd) { struct lu_device *ldev = &ofd->ofd_dt_dev.dd_lu_dev; int rc; CDEBUG(D_HA, "%s: recovery is over\n", ofd_name(ofd)); if (!ofd->ofd_skip_lfsck && !ofd->ofd_osd->dd_rdonly) { struct lfsck_start_param lsp; lsp.lsp_start = NULL; lsp.lsp_index_valid = 0; rc = lfsck_start(env, ofd->ofd_osd, &lsp); if (rc != 0 && rc != -EALREADY) CWARN("%s: auto trigger paused LFSCK failed: rc = %d\n", ofd_name(ofd), rc); } return ldev->ld_ops->ldo_recovery_complete(env, ldev); } /** * Implementation of obd_ops::o_postrecov. * * This function is called from target_finish_recovery() upon recovery * completion. * * \param[in] obd OBD device of OFD * * \retval 0 if successful * \retval negative value on error */ static int ofd_obd_postrecov(struct obd_device *obd) { struct lu_env env; struct lu_device *ldev = obd->obd_lu_dev; int rc; ENTRY; rc = lu_env_init(&env, LCT_DT_THREAD); if (rc) RETURN(rc); ofd_info_init(&env, obd->obd_self_export); rc = ofd_postrecov(&env, ofd_dev(ldev)); lu_env_fini(&env); RETURN(rc); } /** * Implementation of obd_ops::o_set_info_async. * * This function is not called from request handler, it is only used by * class_notify_sptlrpc_conf() locally by direct obd_set_info_async() call. * \see ofd_set_info_hdl() for request handler function. * * \param[in] env execution environment * \param[in] exp OBD export of OFD device * \param[in] keylen length of \a key * \param[in] key key name * \param[in] vallen length of \a val * \param[in] val the \a key value * \param[in] set not used in OFD * * \retval 0 if successful * \retval negative value on error */ static int ofd_set_info_async(const struct lu_env *env, struct obd_export *exp, __u32 keylen, void *key, __u32 vallen, void *val, struct ptlrpc_request_set *set) { int rc = 0; ENTRY; if (!exp->exp_obd) { CDEBUG(D_IOCTL, "invalid export %p\n", exp); RETURN(-EINVAL); } if (KEY_IS(KEY_SPTLRPC_CONF)) { rc = tgt_adapt_sptlrpc_conf(class_exp2tgt(exp)); } else { CERROR("%s: Unsupported key %s\n", exp->exp_obd->obd_name, (char *)key); rc = -EOPNOTSUPP; } RETURN(rc); } /** * Implementation of obd_ops::o_get_info. * * This function is not called from request handler, it is only used by * direct call from nrs_orr_range_fill_physical() in ptlrpc, see LU-3239. * * \see ofd_get_info_hdl() for request handler function. * * \param[in] env execution environment * \param[in] exp OBD export of OFD device * \param[in] keylen length of \a key * \param[in] key key name * \param[out] vallen length of key value * \param[out] val the key value to return * * \retval 0 if successful * \retval negative value on error */ static int ofd_get_info(const struct lu_env *env, struct obd_export *exp, __u32 keylen, void *key, __u32 *vallen, void *val) { struct ofd_thread_info *info; struct ofd_device *ofd; struct ll_fiemap_info_key *fm_key = key; struct fiemap *fiemap = val; int rc = 0; ENTRY; if (!exp->exp_obd) { CDEBUG(D_IOCTL, "invalid client export %p\n", exp); RETURN(-EINVAL); } ofd = ofd_exp(exp); if (KEY_IS(KEY_FIEMAP)) { info = ofd_info_init(env, exp); rc = ostid_to_fid(&info->fti_fid, &fm_key->lfik_oa.o_oi, ofd->ofd_lut.lut_lsd.lsd_osd_index); if (rc != 0) RETURN(rc); rc = ofd_fiemap_get(env, ofd, &info->fti_fid, fiemap); } else { CERROR("%s: not supported key %s\n", ofd_name(ofd), (char *)key); rc = -EOPNOTSUPP; } RETURN(rc); } /** * Implementation of obd_ops::o_statfs. * * This function returns information about a storage file system. * It is called from several places by using the OBD API as well as * by direct call, e.g. from request handler. * * \see ofd_statfs_hdl() for request handler function. * * Report also the state of the OST to the caller in osfs->os_state * (OS_STATE_READONLY, OS_STATE_DEGRADED). * * \param[in] env execution environment * \param[in] exp OBD export of OFD device * \param[out] osfs statistic data to return * \param[in] max_age maximum age for cached data * \param[in] flags not used in OFD * * \retval 0 if successful * \retval negative value on error */ int ofd_statfs(const struct lu_env *env, struct obd_export *exp, struct obd_statfs *osfs, time64_t max_age, __u32 flags) { struct obd_device *obd = class_exp2obd(exp); struct ofd_device *ofd = ofd_exp(exp); struct tg_grants_data *tgd = &ofd->ofd_lut.lut_tgd; int rc; ENTRY; rc = tgt_statfs_internal(env, &ofd->ofd_lut, osfs, max_age, NULL); if (unlikely(rc)) GOTO(out, rc); /* * at least try to account for cached pages. its still racy and * might be under-reporting if clients haven't announced their * caches with brw recently */ CDEBUG(D_SUPER | D_CACHE, "blocks cached %llu granted %llu pending %llu free %llu avail %llu\n", tgd->tgd_tot_dirty, tgd->tgd_tot_granted, tgd->tgd_tot_pending, osfs->os_bfree << tgd->tgd_blockbits, osfs->os_bavail << tgd->tgd_blockbits); osfs->os_bavail -= min_t(u64, osfs->os_bavail, ((tgd->tgd_tot_dirty + tgd->tgd_tot_pending + osfs->os_bsize - 1) >> tgd->tgd_blockbits)); /* * The QoS code on the MDS does not care about space reserved for * precreate, so take it out. */ if (exp_connect_flags(exp) & OBD_CONNECT_MDS) { struct tg_export_data *ted; ted = &obd->obd_self_export->exp_target_data; osfs->os_granted = min_t(u64, osfs->os_bavail, ted->ted_grant >> tgd->tgd_blockbits); osfs->os_bavail -= osfs->os_granted; } tgt_grant_sanity_check(obd, __func__); CDEBUG(D_CACHE, "%llu blocks: %llu free, %llu avail; " "%llu objects: %llu free; state %x\n", osfs->os_blocks, osfs->os_bfree, osfs->os_bavail, osfs->os_files, osfs->os_ffree, osfs->os_state); if (OBD_FAIL_CHECK_VALUE(OBD_FAIL_OST_ENOINO, ofd->ofd_lut.lut_lsd.lsd_osd_index)) { /* Reduce free inode count to zero, but keep "used" intact */ osfs->os_files -= osfs->os_ffree; osfs->os_ffree -= osfs->os_ffree; } /* OS_STATE_READONLY can be set by OSD already */ if (ofd->ofd_raid_degraded) osfs->os_state |= OS_STATE_DEGRADED; if (ofd->ofd_no_precreate) osfs->os_state |= OS_STATE_NOPRECREATE; if (obd->obd_self_export != exp && !exp_grant_param_supp(exp) && tgd->tgd_blockbits > COMPAT_BSIZE_SHIFT) { /* * clients which don't support OBD_CONNECT_GRANT_PARAM * should not see a block size > page size, otherwise * cl_lost_grant goes mad. Therefore, we emulate a 4KB (=2^12) * block size which is the biggest block size known to work * with all client's page size. */ osfs->os_blocks <<= tgd->tgd_blockbits - COMPAT_BSIZE_SHIFT; osfs->os_bfree <<= tgd->tgd_blockbits - COMPAT_BSIZE_SHIFT; osfs->os_bavail <<= tgd->tgd_blockbits - COMPAT_BSIZE_SHIFT; osfs->os_granted <<= tgd->tgd_blockbits - COMPAT_BSIZE_SHIFT; osfs->os_bsize = 1 << COMPAT_BSIZE_SHIFT; } if (OBD_FAIL_CHECK_VALUE(OBD_FAIL_OST_ENOSPC, ofd->ofd_lut.lut_lsd.lsd_osd_index)) { /* Reduce free blocks count near zero, but keep "used" intact */ osfs->os_bavail -= osfs->os_bavail - 2; osfs->os_blocks -= osfs->os_bfree - 2; osfs->os_bfree -= osfs->os_bfree - 2; } EXIT; out: return rc; } /** * Implementation of obd_ops::o_setattr. * * This function is only used by ECHO client when it is run on top of OFD, * \see ofd_setattr_hdl() for request handler function. * \param[in] env execution environment * \param[in] exp OBD export of OFD device * \param[in] oa setattr parameters * * \retval 0 if successful * \retval negative value on error */ static int ofd_echo_setattr(const struct lu_env *env, struct obd_export *exp, struct obdo *oa) { struct ofd_thread_info *info; struct ofd_device *ofd = ofd_exp(exp); struct ldlm_namespace *ns = ofd->ofd_namespace; struct ldlm_resource *res; struct ofd_object *fo; struct lu_fid *fid = &oa->o_oi.oi_fid; int rc = 0; ENTRY; info = ofd_info_init(env, exp); ost_fid_build_resid(fid, &info->fti_resid); /* * This would be very bad - accidentally truncating a file when * changing the time or similar - bug 12203. */ if (oa->o_valid & OBD_MD_FLSIZE) { static char mdsinum[48]; if (oa->o_valid & OBD_MD_FLFID) snprintf(mdsinum, sizeof(mdsinum) - 1, "of parent "DFID, oa->o_parent_seq, oa->o_parent_oid, 0); else mdsinum[0] = '\0'; CERROR("%s: setattr from %s trying to truncate object "DFID " %s\n", ofd_name(ofd), obd_export_nid2str(exp), PFID(fid), mdsinum); GOTO(out, rc = -EPERM); } fo = ofd_object_find_exists(env, ofd, fid); if (IS_ERR(fo)) { CERROR("%s: can't find object "DFID"\n", ofd_name(ofd), PFID(fid)); GOTO(out, rc = PTR_ERR(fo)); } la_from_obdo(&info->fti_attr, oa, oa->o_valid); info->fti_attr.la_valid &= ~LA_TYPE; /* setting objects attributes (including owner/group) */ rc = ofd_attr_set(env, fo, &info->fti_attr, oa); if (rc) GOTO(out_unlock, rc); ofd_counter_incr(exp, LPROC_OFD_STATS_SETATTR, NULL, 1); EXIT; out_unlock: ofd_object_put(env, fo); out: if (rc == 0) { /* * we do not call this before to avoid lu_object_find() in * ->lvbo_update() holding another reference on the object. * otherwise concurrent destroy can make the object unavailable * for 2nd lu_object_find() waiting for the first reference * to go... deadlock! */ res = ldlm_resource_get(ns, NULL, &info->fti_resid, LDLM_EXTENT, 0); if (!IS_ERR(res)) { ldlm_res_lvbo_update(res, NULL, 0); ldlm_resource_putref(res); } } return rc; } /** * Destroy OFD object by its FID. * * Supplemental function to destroy object by FID, it is used by request * handler and by ofd_echo_destroy() below to find object by FID, lock it * and call ofd_destroy() finally. * * \param[in] env execution environment * \param[in] ofd OFD device * \param[in] fid FID of object * \param[in] orphan set if object being destroyed is an orphan * * \retval 0 if successful * \retval negative value on error */ int ofd_destroy_by_fid(const struct lu_env *env, struct ofd_device *ofd, const struct lu_fid *fid, int orphan) { struct ofd_thread_info *info = ofd_info(env); struct lustre_handle lockh; union ldlm_policy_data policy = { .l_extent = { 0, OBD_OBJECT_EOF } }; struct ofd_object *fo; __u64 flags = LDLM_FL_AST_DISCARD_DATA; __u64 rc = 0; ENTRY; fo = ofd_object_find_exists(env, ofd, fid); if (IS_ERR(fo)) RETURN(PTR_ERR(fo)); /* * Tell the clients that the object is gone now and that they should * throw away any cached pages. */ ost_fid_build_resid(fid, &info->fti_resid); rc = ldlm_cli_enqueue_local(env, ofd->ofd_namespace, &info->fti_resid, LDLM_EXTENT, &policy, LCK_PW, &flags, ldlm_blocking_ast, ldlm_completion_ast, NULL, NULL, 0, LVB_T_NONE, NULL, &lockh); /* We only care about the side-effects, just drop the lock. */ if (rc == ELDLM_OK) ldlm_lock_decref(&lockh, LCK_PW); LASSERT(fo != NULL); rc = ofd_destroy(env, fo, orphan); EXIT; ofd_object_put(env, fo); RETURN(rc); } /** * Implementation of obd_ops::o_destroy. * * This function is only used by ECHO client when it is run on top of OFD, * \see ofd_destroy_hdl() for request handler function. * \param[in] env execution environment * \param[in] exp OBD export of OFD device * \param[in] oa obdo structure with FID * * Note: this is OBD API method which is common API for server OBDs and * client OBDs. Thus some parameters used in client OBDs may not be used * on server OBDs and vice versa. * * \retval 0 if successful * \retval negative value on error */ static int ofd_echo_destroy(const struct lu_env *env, struct obd_export *exp, struct obdo *oa) { struct ofd_device *ofd = ofd_exp(exp); struct lu_fid *fid = &oa->o_oi.oi_fid; int rc = 0; ENTRY; ofd_info_init(env, exp); rc = ofd_validate_seq(exp, ostid_seq(&oa->o_oi)); if (rc != 0) RETURN(rc); CDEBUG(D_HA, "%s: Destroy object "DFID"\n", ofd_name(ofd), PFID(fid)); rc = ofd_destroy_by_fid(env, ofd, fid, 0); if (rc == -ENOENT) { CDEBUG(D_INODE, "%s: destroying non-existent object "DFID"\n", ofd_name(ofd), PFID(fid)); GOTO(out, rc); } else if (rc != 0) { CERROR("%s: error destroying object "DFID": %d\n", ofd_name(ofd), PFID(fid), rc); GOTO(out, rc); } EXIT; out: return rc; } /** * Implementation of obd_ops::o_create. * * This function is only used by ECHO client when it is run on top of OFD * and just creates an object. * \see ofd_create_hdl() for request handler function. * * \param[in] env execution environment * \param[in] exp OBD export of OFD device * \param[in] oa obdo structure with FID sequence to use * * Note: this is OBD API method which is common API for server OBDs and * client OBDs. Thus some parameters used in client OBDs may not be used * on server OBDs and vice versa. * * \retval 0 if successful * \retval negative value on error */ static int ofd_echo_create(const struct lu_env *env, struct obd_export *exp, struct obdo *oa) { struct ofd_device *ofd = ofd_exp(exp); u64 seq = ostid_seq(&oa->o_oi); struct ofd_seq *oseq; long granted; u64 next_id; s64 diff = 1; int rc = 0; int count; ENTRY; if (ofd->ofd_no_precreate) return -EPERM; ofd_info_init(env, exp); LASSERT(seq == FID_SEQ_ECHO); LASSERT(oa->o_valid & OBD_MD_FLGROUP); CDEBUG(D_INFO, "ofd_create("DOSTID")\n", POSTID(&oa->o_oi)); down_read(&ofd->ofd_lastid_rwsem); /* * Currently, for safe, we do not distinguish which LAST_ID is broken, * we may do that in the future. * Return -ENOSPC until the LAST_ID rebuilt. */ if (unlikely(ofd->ofd_lastid_rebuilding)) GOTO(out_sem, rc = -ENOSPC); rc = ofd_validate_seq(exp, seq); if (rc != 0) RETURN(rc); oseq = ofd_seq_load(env, ofd, seq); if (IS_ERR(oseq)) { CERROR("%s: Can't find FID Sequence %#llx: rc = %ld\n", ofd_name(ofd), seq, PTR_ERR(oseq)); GOTO(out_sem, rc = -EINVAL); } mutex_lock(&oseq->os_create_lock); granted = tgt_grant_create(env, ofd_obd(ofd)->obd_self_export, &diff); if (granted < 0) { rc = granted; granted = 0; CDEBUG(D_HA, "%s: failed to acquire grant space for precreate (%lld): rc = %d\n", ofd_name(ofd), diff, rc); diff = 0; GOTO(out, rc); } next_id = ofd_seq_last_oid(oseq) + 1; count = ofd_precreate_batch(ofd, (int)diff); rc = ofd_precreate_objects(env, ofd, next_id, oseq, count, 0); if (rc < 0) { CERROR("%s: unable to precreate: rc = %d\n", ofd_name(ofd), rc); } else { rc = ostid_set_id(&oa->o_oi, ofd_seq_last_oid(oseq)); if (rc) { CERROR("%s: Bad %llu to set " DOSTID " : rc %d\n", ofd_name(ofd), (unsigned long long)ofd_seq_last_oid(oseq), POSTID(&oa->o_oi), rc); } oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP; } tgt_grant_commit(ofd_obd(ofd)->obd_self_export, granted, rc); out: mutex_unlock(&oseq->os_create_lock); ofd_seq_put(env, oseq); out_sem: up_read(&ofd->ofd_lastid_rwsem); RETURN(rc); } /** * Implementation of obd_ops::o_getattr. * * This function is only used by ECHO client when it is run on top of OFD * and returns attributes of object. * \see ofd_getattr_hdl() for request handler function. * * \param[in] env execution environment * \param[in] exp OBD export of OFD device * \param[in,out] oa contains FID of object to get attributes from and * is used to return attributes back * * \retval 0 if successful * \retval negative value on error */ static int ofd_echo_getattr(const struct lu_env *env, struct obd_export *exp, struct obdo *oa) { struct ofd_device *ofd = ofd_exp(exp); struct ofd_thread_info *info; struct lu_fid *fid = &oa->o_oi.oi_fid; struct ofd_object *fo; int rc = 0; ENTRY; info = ofd_info_init(env, exp); fo = ofd_object_find_exists(env, ofd, fid); if (IS_ERR(fo)) GOTO(out, rc = PTR_ERR(fo)); LASSERT(fo != NULL); rc = ofd_attr_get(env, fo, &info->fti_attr); oa->o_valid = OBD_MD_FLID; if (rc == 0) { __u64 curr_version; obdo_from_la(oa, &info->fti_attr, OFD_VALID_FLAGS | LA_UID | LA_GID | LA_PROJID); /* Store object version in reply */ curr_version = dt_version_get(env, ofd_object_child(fo)); if ((__s64)curr_version != -EOPNOTSUPP) { oa->o_valid |= OBD_MD_FLDATAVERSION; oa->o_data_version = curr_version; } } ofd_object_put(env, fo); out: RETURN(rc); } /** * Get object version for OBD_IOC_GET_OBJ_VERSION ioctl. * * This is supplemental function for ofd_iocontrol() to return object * version for lctl tool. * * \param[in] env execution environment * \param[in] ofd OFD device * \param[out] karg ioctl data * * \retval 0 if successful * \retval negative value on error */ static int ofd_ioc_get_obj_version(const struct lu_env *env, struct ofd_device *ofd, void *karg) { struct obd_ioctl_data *data = karg; struct lu_fid fid; struct ofd_object *fo; dt_obj_version_t version; int rc = 0; ENTRY; if (!data->ioc_inlbuf2 || data->ioc_inllen2 != sizeof(version)) GOTO(out, rc = -EINVAL); if (data->ioc_inlbuf1 && data->ioc_inllen1 == sizeof(fid)) { fid = *(struct lu_fid *)data->ioc_inlbuf1; } else if (data->ioc_inlbuf3 && data->ioc_inllen3 == sizeof(__u64) && data->ioc_inlbuf4 && data->ioc_inllen4 == sizeof(__u64)) { struct ost_id ostid = { }; ostid_set_seq(&ostid, *(__u64 *)data->ioc_inlbuf4); rc = ostid_set_id(&ostid, *(__u64 *)data->ioc_inlbuf3); if (rc) GOTO(out, rc); rc = ostid_to_fid(&fid, &ostid, ofd->ofd_lut.lut_lsd.lsd_osd_index); if (rc != 0) GOTO(out, rc); } else { GOTO(out, rc = -EINVAL); } if (!fid_is_sane(&fid)) GOTO(out, rc = -EINVAL); fo = ofd_object_find(env, ofd, &fid); if (IS_ERR(fo)) GOTO(out, rc = PTR_ERR(fo)); if (!ofd_object_exists(fo)) GOTO(out_fo, rc = -ENOENT); if (lu_object_remote(&fo->ofo_obj.do_lu)) GOTO(out_fo, rc = -EREMOTE); version = dt_version_get(env, ofd_object_child(fo)); if (version == 0) GOTO(out_fo, rc = -EIO); *(dt_obj_version_t *)data->ioc_inlbuf2 = version; EXIT; out_fo: ofd_object_put(env, fo); out: return rc; } /** * Implementation of obd_ops::o_iocontrol. * * This is OFD ioctl handling function which is primary interface for * Lustre tools like lfs, lctl and lfsck. * * \param[in] cmd ioctl command * \param[in] exp OBD export of OFD * \param[in] len not used * \param[in,out] karg buffer with data * \param[in] uarg not used * * \retval 0 if successful * \retval negative value on error */ static int ofd_iocontrol(unsigned int cmd, struct obd_export *exp, int len, void *karg, void __user *uarg) { struct lu_env env; struct ofd_device *ofd = ofd_exp(exp); struct obd_device *obd = ofd_obd(ofd); int rc; ENTRY; CDEBUG(D_IOCTL, "handling ioctl cmd %#x\n", cmd); rc = lu_env_init(&env, LCT_DT_THREAD); if (rc) RETURN(rc); switch (cmd) { case OBD_IOC_ABORT_RECOVERY: CERROR("%s: aborting recovery\n", obd->obd_name); obd->obd_abort_recovery = 1; target_stop_recovery_thread(obd); break; case OBD_IOC_SYNC: CDEBUG(D_RPCTRACE, "syncing ost %s\n", obd->obd_name); rc = dt_sync(&env, ofd->ofd_osd); break; case OBD_IOC_SET_READONLY: rc = dt_sync(&env, ofd->ofd_osd); if (rc == 0) rc = dt_ro(&env, ofd->ofd_osd); break; case OBD_IOC_START_LFSCK: { struct obd_ioctl_data *data = karg; struct lfsck_start_param lsp; if (unlikely(!data)) { rc = -EINVAL; break; } lsp.lsp_start = (struct lfsck_start *)(data->ioc_inlbuf1); lsp.lsp_index_valid = 0; rc = lfsck_start(&env, ofd->ofd_osd, &lsp); break; } case OBD_IOC_STOP_LFSCK: { struct obd_ioctl_data *data = karg; struct lfsck_stop stop; stop.ls_status = LS_STOPPED; /* Old lfsck utils may pass NULL @stop. */ if (!data->ioc_inlbuf1) stop.ls_flags = 0; else stop.ls_flags = ((struct lfsck_stop *)(data->ioc_inlbuf1))->ls_flags; rc = lfsck_stop(&env, ofd->ofd_osd, &stop); break; } case OBD_IOC_GET_OBJ_VERSION: rc = ofd_ioc_get_obj_version(&env, ofd, karg); break; default: CERROR("%s: not supported cmd = %#x\n", obd->obd_name, cmd); rc = -ENOTTY; } lu_env_fini(&env); RETURN(rc); } /** * Implementation of obd_ops::o_precleanup. * * This function stops device activity before shutting it down. It is called * from a cleanup function upon forceful device cleanup. For OFD there are no * special actions, it just invokes target_recovery_cleanup(). * * \param[in] obd OBD device of OFD * * \retval 0 */ static int ofd_precleanup(struct obd_device *obd) { ENTRY; target_cleanup_recovery(obd); RETURN(0); } /** * Implementation of obd_ops::o_health_check. * * This function checks the OFD device health - ability to respond on * incoming requests. There are two health_check methods: * - get statfs from the OSD. It checks just responsiveness of * bottom device * - do write attempt on bottom device to check it is fully operational and * is not stuck. This is expensive method and requires special configuration * option --enable-health-write while building Lustre, it is turned off * by default. * * \param[in] nul not used * \param[in] obd OBD device of OFD * * \retval 0 if successful * \retval negative value in case of error */ static int ofd_health_check(const struct lu_env *nul, struct obd_device *obd) { struct ofd_device *ofd = ofd_dev(obd->obd_lu_dev); struct ofd_thread_info *info; struct lu_env env; #ifdef USE_HEALTH_CHECK_WRITE struct thandle *th; #endif int rc = 0; /* obd_proc_read_health pass NULL env, we need real one */ rc = lu_env_init(&env, LCT_DT_THREAD); if (rc) RETURN(rc); info = ofd_info_init(&env, NULL); rc = dt_statfs(&env, ofd->ofd_osd, &info->fti_u.osfs); if (unlikely(rc)) GOTO(out, rc); if (info->fti_u.osfs.os_state & OS_STATE_READONLY) GOTO(out, rc = -EROFS); #ifdef USE_HEALTH_CHECK_WRITE OBD_ALLOC(info->fti_buf.lb_buf, PAGE_SIZE); if (!info->fti_buf.lb_buf) GOTO(out, rc = -ENOMEM); info->fti_buf.lb_len = PAGE_SIZE; info->fti_off = 0; th = dt_trans_create(&env, ofd->ofd_osd); if (IS_ERR(th)) GOTO(out, rc = PTR_ERR(th)); rc = dt_declare_record_write(&env, ofd->ofd_health_check_file, &info->fti_buf, info->fti_off, th); if (rc == 0) { th->th_sync = 1; /* sync IO is needed */ rc = dt_trans_start_local(&env, ofd->ofd_osd, th); if (rc == 0) rc = dt_record_write(&env, ofd->ofd_health_check_file, &info->fti_buf, &info->fti_off, th); } dt_trans_stop(&env, ofd->ofd_osd, th); OBD_FREE(info->fti_buf.lb_buf, PAGE_SIZE); CDEBUG(D_INFO, "write 1 page synchronously for checking io rc %d\n", rc); #endif out: lu_env_fini(&env); return !!rc; } const struct obd_ops ofd_obd_ops = { .o_owner = THIS_MODULE, .o_connect = ofd_obd_connect, .o_reconnect = ofd_obd_reconnect, .o_disconnect = ofd_obd_disconnect, .o_create = ofd_echo_create, .o_statfs = ofd_statfs, .o_setattr = ofd_echo_setattr, .o_preprw = ofd_preprw, .o_commitrw = ofd_commitrw, .o_destroy = ofd_echo_destroy, .o_init_export = ofd_init_export, .o_destroy_export = ofd_destroy_export, .o_postrecov = ofd_obd_postrecov, .o_getattr = ofd_echo_getattr, .o_iocontrol = ofd_iocontrol, .o_precleanup = ofd_precleanup, .o_health_check = ofd_health_check, .o_set_info_async = ofd_set_info_async, .o_get_info = ofd_get_info, };