/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * mds/mds_fs.c * Lustre Metadata Server (MDS) filesystem interface code * * Copyright (C) 2002, 2003 Cluster File Systems, Inc. * Author: Andreas Dilger * * This file is part of Lustre, http://www.lustre.org. * * Lustre is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. * * Lustre 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 for more details. * * You should have received a copy of the GNU General Public License * along with Lustre; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define EXPORT_SYMTAB #define DEBUG_SUBSYSTEM S_MDS #include #include #include #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)) #include #endif #include #include #include #include #include #include #include "mds_internal.h" /* This limit is arbitrary, but for now we fit it in 1 page (32k clients) */ #define MDS_MAX_CLIENTS (PAGE_SIZE * 8) #define MDS_MAX_CLIENT_WORDS (MDS_MAX_CLIENTS / sizeof(unsigned long)) #define LAST_RCVD "last_rcvd" /* Add client data to the MDS. We use a bitmap to locate a free space * in the last_rcvd file if cl_off is -1 (i.e. a new client). * Otherwise, we have just read the data from the last_rcvd file and * we know its offset. */ int mds_client_add(struct obd_device *obd, struct mds_obd *mds, struct mds_export_data *med, int cl_idx) { unsigned long *bitmap = mds->mds_client_bitmap; int new_client = (cl_idx == -1); LASSERT(bitmap != NULL); /* XXX if mcd_uuid were a real obd_uuid, I could use obd_uuid_equals */ if (!strcmp(med->med_mcd->mcd_uuid, "OBD_CLASS_UUID")) RETURN(0); /* the bitmap operations can handle cl_idx > sizeof(long) * 8, so * there's no need for extra complication here */ if (new_client) { cl_idx = find_first_zero_bit(bitmap, MDS_MAX_CLIENTS); repeat: if (cl_idx >= MDS_MAX_CLIENTS) { CERROR("no room for clients - fix MDS_MAX_CLIENTS\n"); return -ENOMEM; } if (test_and_set_bit(cl_idx, bitmap)) { CERROR("MDS client %d: found bit is set in bitmap\n", cl_idx); cl_idx = find_next_zero_bit(bitmap, MDS_MAX_CLIENTS, cl_idx); goto repeat; } } else { if (test_and_set_bit(cl_idx, bitmap)) { CERROR("MDS client %d: bit already set in bitmap!!\n", cl_idx); LBUG(); } } CDEBUG(D_INFO, "client at index %d with UUID '%s' added\n", cl_idx, med->med_mcd->mcd_uuid); med->med_idx = cl_idx; med->med_off = MDS_LR_CLIENT_START + (cl_idx * MDS_LR_CLIENT_SIZE); if (new_client) { struct obd_run_ctxt saved; loff_t off = med->med_off; ssize_t written; void *handle; push_ctxt(&saved, &mds->mds_ctxt, NULL); /* We need to start a transaction here first, to avoid a * possible ordering deadlock on last_rcvd->i_sem and the * journal lock. In most places we start the journal handle * first (because we do compound transactions), and then * later do the write into last_rcvd, which gets i_sem. * * Without this transaction, clients connecting at the same * time other MDS operations are ongoing get last_rcvd->i_sem * first (in generic_file_write()) and start the journal * transaction afterwards, and can deadlock with other ops. * * We use FSFILT_OP_SETATTR because it is smallest, but all * ops include enough space for the last_rcvd update so we * could use any of them, or maybe an FSFILT_OP_NONE is best? */ handle = fsfilt_start(obd,mds->mds_rcvd_filp->f_dentry->d_inode, FSFILT_OP_SETATTR, NULL); if (IS_ERR(handle)) { written = PTR_ERR(handle); CERROR("unable to start transaction: rc %d\n", (int)written); } else { written = fsfilt_write_record(obd, mds->mds_rcvd_filp, med->med_mcd, sizeof(*med->med_mcd), &off); fsfilt_commit(obd,mds->mds_rcvd_filp->f_dentry->d_inode, handle, 0); } pop_ctxt(&saved, &mds->mds_ctxt, NULL); if (written != sizeof(*med->med_mcd)) { if (written < 0) RETURN(written); RETURN(-EIO); } CDEBUG(D_INFO, "wrote client mcd at idx %u off %llu (len %u)\n", med->med_idx, med->med_off, (unsigned int)sizeof(*med->med_mcd)); } return 0; } int mds_client_free(struct obd_export *exp) { struct mds_export_data *med = &exp->exp_mds_data; struct mds_obd *mds = &exp->exp_obd->u.mds; struct obd_device *obd = exp->exp_obd; struct mds_client_data zero_mcd; struct obd_run_ctxt saved; int written; unsigned long *bitmap = mds->mds_client_bitmap; LASSERT(bitmap); if (!med->med_mcd) RETURN(0); /* XXX if mcd_uuid were a real obd_uuid, I could use obd_uuid_equals */ if (!strcmp(med->med_mcd->mcd_uuid, "OBD_CLASS_UUID")) GOTO(free_and_out, 0); CDEBUG(D_INFO, "freeing client at index %u (%lld)with UUID '%s'\n", med->med_idx, med->med_off, med->med_mcd->mcd_uuid); if (!test_and_clear_bit(med->med_idx, bitmap)) { CERROR("MDS client %u: bit already clear in bitmap!!\n", med->med_idx); LBUG(); } memset(&zero_mcd, 0, sizeof zero_mcd); push_ctxt(&saved, &mds->mds_ctxt, NULL); written = fsfilt_write_record(obd, mds->mds_rcvd_filp, &zero_mcd, sizeof(zero_mcd), &med->med_off); pop_ctxt(&saved, &mds->mds_ctxt, NULL); if (written != sizeof(zero_mcd)) { CERROR("error zeroing out client %s index %d in %s: %d\n", med->med_mcd->mcd_uuid, med->med_idx, LAST_RCVD, written); } else { CDEBUG(D_INFO, "zeroed out disconnecting client %s at off %d\n", med->med_mcd->mcd_uuid, med->med_idx); } free_and_out: OBD_FREE(med->med_mcd, sizeof(*med->med_mcd)); return 0; } static int mds_server_free_data(struct mds_obd *mds) { OBD_FREE(mds->mds_client_bitmap, MDS_MAX_CLIENT_WORDS * sizeof(unsigned long)); OBD_FREE(mds->mds_server_data, sizeof(*mds->mds_server_data)); mds->mds_server_data = NULL; return 0; } static int mds_read_last_rcvd(struct obd_device *obd, struct file *file) { struct mds_obd *mds = &obd->u.mds; struct mds_server_data *msd; struct mds_client_data *mcd = NULL; loff_t off = 0; int cl_idx; unsigned long last_rcvd_size = file->f_dentry->d_inode->i_size; __u64 last_transno = 0; __u64 mount_count; int rc = 0; LASSERT(sizeof(struct mds_client_data) == MDS_LR_CLIENT_SIZE); LASSERT(sizeof(struct mds_server_data) <= MDS_LR_SERVER_SIZE); OBD_ALLOC(msd, sizeof(*msd)); if (!msd) RETURN(-ENOMEM); OBD_ALLOC(mds->mds_client_bitmap, MDS_MAX_CLIENT_WORDS * sizeof(unsigned long)); if (!mds->mds_client_bitmap) { OBD_FREE(msd, sizeof(*msd)); RETURN(-ENOMEM); } mds->mds_server_data = msd; if (last_rcvd_size == 0) { int written; CWARN("%s: initializing new %s\n", obd->obd_name, LAST_RCVD); memcpy(msd->msd_uuid, obd->obd_uuid.uuid,sizeof(msd->msd_uuid)); msd->msd_server_size = cpu_to_le32(MDS_LR_SERVER_SIZE); msd->msd_client_start = cpu_to_le32(MDS_LR_CLIENT_START); msd->msd_client_size = cpu_to_le16(MDS_LR_CLIENT_SIZE); written = fsfilt_write_record(obd, file, msd, sizeof(*msd), &off); if (written == sizeof(*msd)) RETURN(0); CERROR("%s: error writing new MSD: %d\n", obd->obd_name, written); GOTO(err_msd, rc = (written < 0 ? written : -EIO)); } rc = fsfilt_read_record(obd, file, msd, sizeof(*msd), &off); if (rc != sizeof(*msd)) { CERROR("error reading MDS %s: rc = %d\n", LAST_RCVD,rc); if (rc >= 0) rc = -EIO; GOTO(err_msd, rc); } if (!msd->msd_server_size) msd->msd_server_size = cpu_to_le32(MDS_LR_SERVER_SIZE); if (!msd->msd_client_start) msd->msd_client_start = cpu_to_le32(MDS_LR_CLIENT_START); if (!msd->msd_client_size) msd->msd_client_size = cpu_to_le16(MDS_LR_CLIENT_SIZE); if (msd->msd_feature_incompat) { CERROR("unsupported incompat feature %x\n", le32_to_cpu(msd->msd_feature_incompat)); GOTO(err_msd, rc = -EINVAL); } if (msd->msd_feature_rocompat) { CERROR("unsupported read-only feature %x\n", le32_to_cpu(msd->msd_feature_rocompat)); /* Do something like remount filesystem read-only */ GOTO(err_msd, rc = -EINVAL); } last_transno = le64_to_cpu(msd->msd_last_transno); mds->mds_last_transno = last_transno; mount_count = le64_to_cpu(msd->msd_mount_count); mds->mds_mount_count = mount_count; CDEBUG(D_INODE, "%s: server last_transno: "LPU64"\n", obd->obd_name, last_transno); CDEBUG(D_INODE, "%s: server mount_count: "LPU64"\n", obd->obd_name, mount_count); CDEBUG(D_INODE, "%s: server data size: %u\n", obd->obd_name, le32_to_cpu(msd->msd_server_size)); CDEBUG(D_INODE, "%s: per-client data start: %u\n", obd->obd_name, le32_to_cpu(msd->msd_client_start)); CDEBUG(D_INODE, "%s: per-client data size: %u\n", obd->obd_name, le32_to_cpu(msd->msd_client_size)); CDEBUG(D_INODE, "%s: last_rcvd size: %lu\n", obd->obd_name, last_rcvd_size); CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", obd->obd_name, (last_rcvd_size - MDS_LR_CLIENT_START) / MDS_LR_CLIENT_SIZE); /* When we do a clean FILTER shutdown, we save the last_transno into * the header. If we find clients with higher last_transno values * then those clients may need recovery done. */ for (cl_idx = 0; off < last_rcvd_size; cl_idx++) { __u64 last_transno; int mount_age; if (!mcd) { OBD_ALLOC(mcd, sizeof(*mcd)); if (!mcd) GOTO(err_msd, rc = -ENOMEM); } /* Don't assume off is incremented properly, in case * sizeof(fsd) isn't the same as fsd->fsd_client_size. */ off = le32_to_cpu(msd->msd_client_start) + cl_idx * le16_to_cpu(msd->msd_client_size); rc = fsfilt_read_record(obd, file, mcd, sizeof(*mcd), &off); if (rc != sizeof(*mcd)) { CERROR("error reading MDS %s offset %d: rc = %d\n", LAST_RCVD, cl_idx, rc); if (rc > 0) /* XXX fatal error or just abort reading? */ rc = -EIO; break; } if (mcd->mcd_uuid[0] == '\0') { CDEBUG(D_INFO, "skipping zeroed client at offset %d\n", cl_idx); continue; } last_transno = le64_to_cpu(mcd->mcd_last_transno); /* These exports are cleaned up by mds_disconnect(), so they * need to be set up like real exports as mds_connect() does. */ mount_age = mount_count - le64_to_cpu(mcd->mcd_mount_count); if (mount_age < MDS_MOUNT_RECOV) { struct obd_export *exp = class_new_export(obd); struct mds_export_data *med; CERROR("RCVRNG CLIENT uuid: %s off: %d lr: "LPU64 "srv lr: "LPU64" mnt: "LPU64" last mount: "LPU64 "\n", mcd->mcd_uuid, cl_idx, last_transno, le64_to_cpu(msd->msd_last_transno), le64_to_cpu(mcd->mcd_mount_count), mount_count); if (!exp) { rc = -ENOMEM; break; } memcpy(&exp->exp_client_uuid.uuid, mcd->mcd_uuid, sizeof exp->exp_client_uuid.uuid); med = &exp->exp_mds_data; med->med_mcd = mcd; mds_client_add(obd, mds, med, cl_idx); /* create helper if export init gets more complex */ INIT_LIST_HEAD(&med->med_open_head); spin_lock_init(&med->med_open_lock); mcd = NULL; obd->obd_recoverable_clients++; class_export_put(exp); } else { CDEBUG(D_INFO, "discarded client %d, UUID '%s', count " LPU64"\n", cl_idx, mcd->mcd_uuid, le64_to_cpu(mcd->mcd_mount_count)); } CDEBUG(D_OTHER, "client at offset %d has last_transno = " LPU64"\n", cl_idx, last_transno); if (last_transno > mds->mds_last_transno) mds->mds_last_transno = last_transno; } obd->obd_last_committed = mds->mds_last_transno; if (obd->obd_recoverable_clients) { CERROR("RECOVERY: %d recoverable clients, last_transno " LPU64"\n", obd->obd_recoverable_clients, mds->mds_last_transno); obd->obd_next_recovery_transno = obd->obd_last_committed + 1; obd->obd_recovering = 1; } if (mcd) OBD_FREE(mcd, sizeof(*mcd)); return 0; err_msd: mds_server_free_data(mds); return rc; } static int mds_fs_prep(struct obd_device *obd) { struct mds_obd *mds = &obd->u.mds; struct obd_run_ctxt saved; struct dentry *dentry; struct file *file; int rc; push_ctxt(&saved, &mds->mds_ctxt, NULL); dentry = simple_mkdir(current->fs->pwd, "ROOT", 0755); if (IS_ERR(dentry)) { rc = PTR_ERR(dentry); CERROR("cannot create ROOT directory: rc = %d\n", rc); GOTO(err_pop, rc); } mds->mds_rootfid.id = dentry->d_inode->i_ino; mds->mds_rootfid.generation = dentry->d_inode->i_generation; mds->mds_rootfid.f_type = S_IFDIR; dput(dentry); dentry = lookup_one_len("__iopen__", current->fs->pwd, strlen("__iopen__")); if (IS_ERR(dentry) || !dentry->d_inode) { rc = (IS_ERR(dentry)) ? PTR_ERR(dentry): -ENOENT; CERROR("cannot open iopen FH directory: rc = %d\n", rc); GOTO(err_pop, rc); } mds->mds_fid_de = dentry; dentry = simple_mkdir(current->fs->pwd, "PENDING", 0777); if (IS_ERR(dentry)) { rc = PTR_ERR(dentry); CERROR("cannot create PENDING directory: rc = %d\n", rc); GOTO(err_fid, rc); } mds->mds_pending_dir = dentry; dentry = simple_mkdir(current->fs->pwd, "LOGS", 0700); if (IS_ERR(dentry)) { rc = PTR_ERR(dentry); CERROR("cannot create LOGS directory: rc = %d\n", rc); GOTO(err_pending, rc); } mds->mds_logs_dir = dentry; file = filp_open(LAST_RCVD, O_RDWR | O_CREAT, 0644); if (IS_ERR(file)) { rc = PTR_ERR(file); CERROR("cannot open/create %s file: rc = %d\n", LAST_RCVD, rc); GOTO(err_logs, rc = PTR_ERR(file)); } if (!S_ISREG(file->f_dentry->d_inode->i_mode)) { CERROR("%s is not a regular file!: mode = %o\n", LAST_RCVD, file->f_dentry->d_inode->i_mode); GOTO(err_filp, rc = -ENOENT); } rc = fsfilt_journal_data(obd, file); if (rc) { CERROR("cannot journal data on %s: rc = %d\n", LAST_RCVD, rc); GOTO(err_filp, rc); } rc = mds_read_last_rcvd(obd, file); if (rc) { CERROR("cannot read %s: rc = %d\n", LAST_RCVD, rc); GOTO(err_client, rc); } mds->mds_rcvd_filp = file; #ifdef I_SKIP_PDFLUSH /* * we need this to protect from deadlock * pdflush vs. lustre_fwrite() */ file->f_dentry->d_inode->i_flags |= I_SKIP_PDFLUSH; #endif err_pop: pop_ctxt(&saved, &mds->mds_ctxt, NULL); return rc; err_client: class_disconnect_exports(obd, 0); err_filp: if (filp_close(file, 0)) CERROR("can't close %s after error\n", LAST_RCVD); err_logs: dput(mds->mds_logs_dir); err_pending: dput(mds->mds_pending_dir); err_fid: dput(mds->mds_fid_de); goto err_pop; } int mds_fs_setup(struct obd_device *obd, struct vfsmount *mnt) { struct mds_obd *mds = &obd->u.mds; ENTRY; mds->mds_vfsmnt = mnt; OBD_SET_CTXT_MAGIC(&mds->mds_ctxt); mds->mds_ctxt.pwdmnt = mnt; mds->mds_ctxt.pwd = mnt->mnt_root; mds->mds_ctxt.fs = get_ds(); RETURN(mds_fs_prep(obd)); } int mds_fs_cleanup(struct obd_device *obd, int flags) { struct mds_obd *mds = &obd->u.mds; struct obd_run_ctxt saved; int rc = 0; if (flags & OBD_OPT_FAILOVER) CERROR("%s: shutting down for failover; client state will" " be preserved.\n", obd->obd_name); class_disconnect_exports(obd, flags); /* cleans up client info too */ mds_server_free_data(mds); push_ctxt(&saved, &mds->mds_ctxt, NULL); if (mds->mds_rcvd_filp) { rc = filp_close(mds->mds_rcvd_filp, 0); mds->mds_rcvd_filp = NULL; if (rc) CERROR("%s file won't close, rc=%d\n", LAST_RCVD, rc); } if (mds->mds_logs_dir) { l_dput(mds->mds_logs_dir); mds->mds_logs_dir = NULL; } if (mds->mds_pending_dir) { l_dput(mds->mds_pending_dir); mds->mds_pending_dir = NULL; } pop_ctxt(&saved, &mds->mds_ctxt, NULL); shrink_dcache_parent(mds->mds_fid_de); dput(mds->mds_fid_de); return rc; } /* This is a callback from the llog_* functions. * Assumes caller has already pushed us into the kernel context. */ int mds_log_close(struct llog_handle *cathandle, struct llog_handle *loghandle) { struct llog_object_hdr *llh = loghandle->lgh_hdr; struct mds_obd *mds = &cathandle->lgh_obd->u.mds; struct dentry *dchild = NULL; int rc; ENTRY; /* If we are going to delete this log, grab a ref before we close * it so we don't have to immediately do another lookup. */ if (llh->llh_hdr.lth_type != LLOG_CATALOG_MAGIC && llh->llh_count == 0){ CDEBUG(D_INODE, "deleting log file "LPX64":%x\n", loghandle->lgh_cookie.lgc_lgl.lgl_oid, loghandle->lgh_cookie.lgc_lgl.lgl_ogen); down(&mds->mds_logs_dir->d_inode->i_sem); dchild = dget(loghandle->lgh_file->f_dentry); llog_delete_log(cathandle, loghandle); } else { CDEBUG(D_INODE, "closing log file "LPX64":%x\n", loghandle->lgh_cookie.lgc_lgl.lgl_oid, loghandle->lgh_cookie.lgc_lgl.lgl_ogen); } rc = filp_close(loghandle->lgh_file, 0); llog_free_handle(loghandle); /* also removes loghandle from list */ if (dchild) { int err = vfs_unlink(mds->mds_logs_dir->d_inode, dchild); if (err) { CERROR("error unlinking empty log %*s: rc %d\n", dchild->d_name.len, dchild->d_name.name, err); if (!rc) rc = err; } l_dput(dchild); up(&mds->mds_logs_dir->d_inode->i_sem); } RETURN(rc); } /* This is a callback from the llog_* functions. * Assumes caller has already pushed us into the kernel context. */ struct llog_handle *mds_log_open(struct obd_device *obd, struct llog_cookie *logcookie) { struct ll_fid fid = { .id = logcookie->lgc_lgl.lgl_oid, .generation = logcookie->lgc_lgl.lgl_ogen, .f_type = S_IFREG }; struct llog_handle *loghandle; struct dentry *dchild; int rc; ENTRY; loghandle = llog_alloc_handle(); if (loghandle == NULL) RETURN(ERR_PTR(-ENOMEM)); down(&obd->u.mds.mds_logs_dir->d_inode->i_sem); dchild = mds_fid2dentry(&obd->u.mds, &fid, NULL); up(&obd->u.mds.mds_logs_dir->d_inode->i_sem); if (IS_ERR(dchild)) { rc = PTR_ERR(dchild); CERROR("error looking up log file "LPX64":%x: rc %d\n", fid.id, fid.generation, rc); GOTO(out, rc); } if (dchild->d_inode == NULL) { rc = -ENOENT; CERROR("nonexistent log file "LPX64":%x: rc %d\n", fid.id, fid.generation, rc); GOTO(out_put, rc); } /* dentry_open does a dput(de) and mntput(mds->mds_vfsmnt) on error */ mntget(obd->u.mds.mds_vfsmnt); loghandle->lgh_file = dentry_open(dchild, obd->u.mds.mds_vfsmnt, O_RDWR | O_LARGEFILE); if (IS_ERR(loghandle->lgh_file)) { rc = PTR_ERR(loghandle->lgh_file); CERROR("error opening logfile "LPX64":%x: rc %d\n", fid.id, fid.generation, rc); GOTO(out, rc); } memcpy(&loghandle->lgh_cookie, logcookie, sizeof(*logcookie)); loghandle->lgh_log_create = mds_log_create; loghandle->lgh_log_open = mds_log_open; loghandle->lgh_log_close = mds_log_close; loghandle->lgh_obd = obd; RETURN(loghandle); out_put: l_dput(dchild); out: llog_free_handle(loghandle); return ERR_PTR(rc); } /* This is a callback from the llog_* functions. * Assumes caller has already pushed us into the kernel context. */ struct llog_handle *mds_log_create(struct obd_device *obd) { char logbuf[24], *logname; /* logSSSSSSSSSS.count */ struct llog_handle *loghandle; int rc, open_flags = O_RDWR | O_CREAT | O_LARGEFILE; ENTRY; loghandle = llog_alloc_handle(); if (!loghandle) RETURN(ERR_PTR(-ENOMEM)); retry: if (!obd->u.mds.mds_catalog) { logname = "LOGS/catalog"; } else { sprintf(logbuf, "LOGS/log%lu.%u\n", CURRENT_SECONDS, obd->u.mds.mds_catalog->lgh_index++); open_flags |= O_EXCL; logname = logbuf; } loghandle->lgh_file = filp_open(logname, open_flags, 0644); if (IS_ERR(loghandle->lgh_file)) { rc = PTR_ERR(loghandle->lgh_file); if (rc == -EEXIST) { CDEBUG(D_HA, "collision in logfile %s creation\n", logname); obd->u.mds.mds_catalog->lgh_index++; goto retry; } CERROR("error opening/creating %s: rc %d\n", logname, rc); GOTO(out_handle, rc); } loghandle->lgh_cookie.lgc_lgl.lgl_oid = loghandle->lgh_file->f_dentry->d_inode->i_ino; loghandle->lgh_cookie.lgc_lgl.lgl_ogen = loghandle->lgh_file->f_dentry->d_inode->i_generation; loghandle->lgh_log_create = mds_log_create; loghandle->lgh_log_open = mds_log_open; loghandle->lgh_log_close = mds_log_close; loghandle->lgh_obd = obd; RETURN(loghandle); out_handle: llog_free_handle(loghandle); return ERR_PTR(rc); } struct llog_handle *mds_get_catalog(struct obd_device *obd) { struct mds_server_data *msd = obd->u.mds.mds_server_data; struct obd_run_ctxt saved; struct llog_handle *cathandle = NULL; int rc = 0; ENTRY; push_ctxt(&saved, &obd->u.mds.mds_ctxt, NULL); if (msd->msd_catalog_oid) { struct llog_cookie catcookie; catcookie.lgc_lgl.lgl_oid = le64_to_cpu(msd->msd_catalog_oid); catcookie.lgc_lgl.lgl_ogen = le32_to_cpu(msd->msd_catalog_ogen); cathandle = mds_log_open(obd, &catcookie); if (IS_ERR(cathandle)) { CERROR("error opening catalog "LPX64":%x: rc %d\n", catcookie.lgc_lgl.lgl_oid, catcookie.lgc_lgl.lgl_ogen, (int)PTR_ERR(cathandle)); msd->msd_catalog_oid = 0; msd->msd_catalog_ogen = 0; } /* ORPHANS FIXME: compare catalog UUID to msd_peeruuid */ } if (!msd->msd_catalog_oid) { struct llog_logid *lgl; cathandle = mds_log_create(obd); if (IS_ERR(cathandle)) { CERROR("error creating new catalog: rc %d\n", (int)PTR_ERR(cathandle)); GOTO(out, cathandle); } lgl = &cathandle->lgh_cookie.lgc_lgl; msd->msd_catalog_oid = cpu_to_le64(lgl->lgl_oid); msd->msd_catalog_ogen = cpu_to_le32(lgl->lgl_ogen); rc = mds_update_server_data(obd); if (rc) { CERROR("error writing new catalog to disk: rc %d\n",rc); GOTO(out_handle, rc); } } rc = llog_init_catalog(cathandle, &obd->u.mds.mds_osc_uuid); out: pop_ctxt(&saved, &obd->u.mds.mds_ctxt, NULL); RETURN(cathandle); out_handle: mds_log_close(cathandle, cathandle); cathandle = ERR_PTR(rc); goto out; } void mds_put_catalog(struct llog_handle *cathandle) { struct llog_handle *loghandle, *n; int rc; ENTRY; list_for_each_entry_safe(loghandle, n, &cathandle->lgh_list, lgh_list) mds_log_close(cathandle, loghandle); rc = filp_close(cathandle->lgh_file, 0); if (rc) CERROR("error closing catalog: rc %d\n", rc); llog_free_handle(cathandle); EXIT; }