/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * linux/fs/obdfilter/filter.c * * Copyright (c) 2001-2003 Cluster File Systems, Inc. * Author: Peter Braam * 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. */ /* * Invariant: Get O/R i_sem for lookup, if needed, before any journal ops * (which need to get journal_lock, may block if journal full). * * Invariant: Call filter_start_transno() before any journal ops to avoid the * same deadlock problem. We can (and want) to get rid of the * transno sem in favour of the dir/inode i_sem to avoid single * threaded operation on the OST. */ #define DEBUG_SUBSYSTEM S_FILTER #include #include #include #include #include #include #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) # include # include #endif #include #include #include #include #include #include #include #include #include #include #include "filter_internal.h" /* Group 0 is no longer a legal group, to catch uninitialized IDs */ #define FILTER_MIN_GROUPS 3 static struct lvfs_callback_ops filter_lvfs_ops; static int filter_destroy(struct obd_export *exp, struct obdo *oa, struct lov_stripe_md *ea, struct obd_trans_info *); struct obd_llogs *filter_grab_llog_for_group(struct obd_device *, int, struct obd_export *); static void filter_commit_cb(struct obd_device *obd, __u64 transno, void *cb_data, int error) { obd_transno_commit_cb(obd, transno, error); } /* Assumes caller has already pushed us into the kernel context. */ int filter_finish_transno(struct obd_export *exp, struct obd_trans_info *oti, int rc) { struct filter_obd *filter = &exp->exp_obd->u.filter; struct filter_export_data *fed = &exp->exp_filter_data; struct filter_client_data *fcd = fed->fed_fcd; __u64 last_rcvd; loff_t off; int err, log_pri = D_HA; /* Propagate error code. */ if (rc) RETURN(rc); if (!exp->exp_obd->obd_replayable || oti == NULL) RETURN(rc); /* we don't allocate new transnos for replayed requests */ if (oti->oti_transno == 0) { spin_lock(&filter->fo_translock); last_rcvd = le64_to_cpu(filter->fo_fsd->fsd_last_transno) + 1; filter->fo_fsd->fsd_last_transno = cpu_to_le64(last_rcvd); spin_unlock(&filter->fo_translock); oti->oti_transno = last_rcvd; } else { spin_lock(&filter->fo_translock); last_rcvd = oti->oti_transno; if (last_rcvd > le64_to_cpu(filter->fo_fsd->fsd_last_transno)) filter->fo_fsd->fsd_last_transno = cpu_to_le64(last_rcvd); spin_unlock(&filter->fo_translock); } fcd->fcd_last_rcvd = cpu_to_le64(last_rcvd); /* could get xid from oti, if it's ever needed */ fcd->fcd_last_xid = 0; off = fed->fed_lr_off; fsfilt_add_journal_cb(exp->exp_obd, filter->fo_sb, last_rcvd, oti->oti_handle, filter_commit_cb, NULL); err = fsfilt_write_record(exp->exp_obd, filter->fo_rcvd_filp, fcd, sizeof(*fcd), &off, 0); if (err) { log_pri = D_ERROR; if (rc == 0) rc = err; } CDEBUG(log_pri, "wrote trans "LPU64" for client %s at #%d: err = %d\n", last_rcvd, fcd->fcd_uuid, fed->fed_lr_idx, err); RETURN(rc); } void f_dput(struct dentry *dentry) { /* Can't go inside filter_ddelete because it can block */ CDEBUG(D_INODE, "putting %s: %p, count = %d\n", dentry->d_name.name, dentry, atomic_read(&dentry->d_count) - 1); LASSERT(atomic_read(&dentry->d_count) > 0); dput(dentry); } /* Add client data to the FILTER. We use a bitmap to locate a free space * in the last_rcvd file if cl_idx is -1 (i.e. a new client). * Otherwise, we have just read the data from the last_rcvd file and * we know its offset. */ static int filter_client_add(struct obd_device *obd, struct filter_obd *filter, struct filter_export_data *fed, int cl_idx) { unsigned long *bitmap = filter->fo_last_rcvd_slots; int new_client = (cl_idx == -1); ENTRY; LASSERT(bitmap != NULL); /* XXX if fcd_uuid were a real obd_uuid, I could use obd_uuid_equals */ if (!strcmp(fed->fed_fcd->fcd_uuid, obd->obd_uuid.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, FILTER_LR_MAX_CLIENTS); repeat: if (cl_idx >= FILTER_LR_MAX_CLIENTS) { CERROR("no client slots - fix FILTER_LR_MAX_CLIENTS\n"); RETURN(-ENOMEM); } if (test_and_set_bit(cl_idx, bitmap)) { CERROR("FILTER client %d: found bit is set in bitmap\n", cl_idx); cl_idx = find_next_zero_bit(bitmap, FILTER_LR_MAX_CLIENTS, cl_idx); goto repeat; } } else { if (test_and_set_bit(cl_idx, bitmap)) { CERROR("FILTER client %d: bit already set in bitmap!\n", cl_idx); LBUG(); } } fed->fed_lr_idx = cl_idx; fed->fed_lr_off = le32_to_cpu(filter->fo_fsd->fsd_client_start) + cl_idx * le16_to_cpu(filter->fo_fsd->fsd_client_size); CDEBUG(D_INFO, "client at index %d (%llu) with UUID '%s' added\n", fed->fed_lr_idx, fed->fed_lr_off, fed->fed_fcd->fcd_uuid); if (new_client) { struct lvfs_run_ctxt saved; loff_t off = fed->fed_lr_off; int err; void *handle; CDEBUG(D_INFO, "writing client fcd at idx %u (%llu) (len %u)\n", fed->fed_lr_idx,off,(unsigned int)sizeof(*fed->fed_fcd)); push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); /* Transaction needed to fix bug 1403 */ handle = fsfilt_start(obd, filter->fo_rcvd_filp->f_dentry->d_inode, FSFILT_OP_SETATTR, NULL); if (IS_ERR(handle)) { err = PTR_ERR(handle); CERROR("unable to start transaction: rc %d\n", err); } else { err = fsfilt_write_record(obd, filter->fo_rcvd_filp, fed->fed_fcd, sizeof(*fed->fed_fcd), &off, 1); fsfilt_commit(obd, filter->fo_sb, filter->fo_rcvd_filp->f_dentry->d_inode, handle, 1); } pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); if (err) { CERROR("error writing %s client idx %u: rc %d\n", LAST_RCVD, fed->fed_lr_idx, err); RETURN(err); } } RETURN(0); } static int filter_client_free(struct obd_export *exp, int flags) { struct filter_export_data *fed = &exp->exp_filter_data; struct filter_obd *filter = &exp->exp_obd->u.filter; struct obd_device *obd = exp->exp_obd; struct filter_client_data zero_fcd; struct lvfs_run_ctxt saved; int rc; loff_t off; ENTRY; if (fed->fed_fcd == NULL) RETURN(0); if (flags & OBD_OPT_FAILOVER) GOTO(free, 0); /* XXX if fcd_uuid were a real obd_uuid, I could use obd_uuid_equals */ if (strcmp(fed->fed_fcd->fcd_uuid, obd->obd_uuid.uuid ) == 0) GOTO(free, 0); LASSERT(filter->fo_last_rcvd_slots != NULL); off = fed->fed_lr_off; CDEBUG(D_INFO, "freeing client at idx %u (%lld) with UUID '%s'\n", fed->fed_lr_idx, fed->fed_lr_off, fed->fed_fcd->fcd_uuid); /* Clear the bit _after_ zeroing out the client so we don't race with filter_client_add and zero out new clients.*/ if (!test_bit(fed->fed_lr_idx, filter->fo_last_rcvd_slots)) { CERROR("FILTER client %u: bit already clear in bitmap!!\n", fed->fed_lr_idx); LBUG(); } memset(&zero_fcd, 0, sizeof zero_fcd); push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); rc = fsfilt_write_record(obd, filter->fo_rcvd_filp, &zero_fcd, sizeof(zero_fcd), &off, 1); if (rc == 0) /* update server's transno */ filter_update_server_data(obd, filter->fo_rcvd_filp, filter->fo_fsd, 1); pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); CDEBUG(rc == 0 ? D_INFO : D_ERROR, "zeroing disconnecting client %s at idx %u (%llu) in %s rc %d\n", fed->fed_fcd->fcd_uuid, fed->fed_lr_idx, fed->fed_lr_off, LAST_RCVD, rc); if (!test_and_clear_bit(fed->fed_lr_idx, filter->fo_last_rcvd_slots)) { CERROR("FILTER client %u: bit already clear in bitmap!!\n", fed->fed_lr_idx); LBUG(); } free: OBD_FREE(fed->fed_fcd, sizeof(*fed->fed_fcd)); RETURN(0); } static int filter_free_server_data(struct filter_obd *filter) { OBD_FREE(filter->fo_fsd, sizeof(*filter->fo_fsd)); filter->fo_fsd = NULL; OBD_FREE(filter->fo_last_rcvd_slots, FILTER_LR_MAX_CLIENT_WORDS * sizeof(unsigned long)); filter->fo_last_rcvd_slots = NULL; return 0; } /* assumes caller is already in kernel ctxt */ int filter_update_server_data(struct obd_device *obd, struct file *filp, struct filter_server_data *fsd, int force_sync) { loff_t off = 0; int rc; ENTRY; CDEBUG(D_INODE, "server uuid : %s\n", fsd->fsd_uuid); CDEBUG(D_INODE, "server last_rcvd : "LPU64"\n", le64_to_cpu(fsd->fsd_last_transno)); CDEBUG(D_INODE, "server last_mount: "LPU64"\n", le64_to_cpu(fsd->fsd_mount_count)); rc = fsfilt_write_record(obd, filp, fsd, sizeof(*fsd), &off,force_sync); if (rc) CERROR("error writing filter_server_data: rc = %d\n", rc); RETURN(rc); } int filter_update_last_objid(struct obd_device *obd, obd_gr group, int force_sync) { struct filter_obd *filter = &obd->u.filter; __u64 tmp; loff_t off = 0; int rc; ENTRY; if (filter->fo_last_objid_files[group] == NULL) { CERROR("Object group "LPU64" not fully setup; not updating " "last_objid\n", group); RETURN(0); } CDEBUG(D_INODE, "server last_objid for group "LPU64": "LPU64"\n", group, filter->fo_last_objids[group]); tmp = cpu_to_le64(filter->fo_last_objids[group]); rc = fsfilt_write_record(obd, filter->fo_last_objid_files[group], &tmp, sizeof(tmp), &off, force_sync); if (rc) CERROR("error writing group "LPU64" last objid: rc = %d\n", group, rc); RETURN(rc); } /* assumes caller has already in kernel ctxt */ static int filter_init_server_data(struct obd_device *obd, struct file * filp) { struct filter_obd *filter = &obd->u.filter; struct filter_server_data *fsd; struct filter_client_data *fcd = NULL; struct inode *inode = filp->f_dentry->d_inode; unsigned long last_rcvd_size = inode->i_size; __u64 mount_count; int cl_idx; loff_t off = 0; int rc; /* ensure padding in the struct is the correct size */ LASSERT (offsetof(struct filter_server_data, fsd_padding) + sizeof(fsd->fsd_padding) == FILTER_LR_SERVER_SIZE); LASSERT (offsetof(struct filter_client_data, fcd_padding) + sizeof(fcd->fcd_padding) == FILTER_LR_CLIENT_SIZE); OBD_ALLOC(fsd, sizeof(*fsd)); if (!fsd) RETURN(-ENOMEM); filter->fo_fsd = fsd; OBD_ALLOC(filter->fo_last_rcvd_slots, FILTER_LR_MAX_CLIENT_WORDS * sizeof(unsigned long)); if (filter->fo_last_rcvd_slots == NULL) { OBD_FREE(fsd, sizeof(*fsd)); RETURN(-ENOMEM); } if (last_rcvd_size == 0) { CWARN("%s: initializing new %s\n", obd->obd_name, LAST_RCVD); memcpy(fsd->fsd_uuid, obd->obd_uuid.uuid,sizeof(fsd->fsd_uuid)); fsd->fsd_last_transno = 0; mount_count = fsd->fsd_mount_count = 0; fsd->fsd_server_size = cpu_to_le32(FILTER_LR_SERVER_SIZE); fsd->fsd_client_start = cpu_to_le32(FILTER_LR_CLIENT_START); fsd->fsd_client_size = cpu_to_le16(FILTER_LR_CLIENT_SIZE); fsd->fsd_subdir_count = cpu_to_le16(FILTER_SUBDIR_COUNT); filter->fo_subdir_count = FILTER_SUBDIR_COUNT; } else { rc = fsfilt_read_record(obd, filp, fsd, sizeof(*fsd), &off); if (rc) { CDEBUG(D_INODE,"OBD filter: error reading %s: rc %d\n", LAST_RCVD, rc); GOTO(err_fsd, rc); } if (strcmp(fsd->fsd_uuid, obd->obd_uuid.uuid) != 0) { CERROR("OBD UUID %s does not match last_rcvd UUID %s\n", obd->obd_uuid.uuid, fsd->fsd_uuid); GOTO(err_fsd, rc = -EINVAL); } mount_count = le64_to_cpu(fsd->fsd_mount_count); filter->fo_subdir_count = le16_to_cpu(fsd->fsd_subdir_count); } if (fsd->fsd_feature_incompat & ~cpu_to_le32(FILTER_INCOMPAT_SUPP)) { CERROR("unsupported feature %x\n", le32_to_cpu(fsd->fsd_feature_incompat) & ~FILTER_INCOMPAT_SUPP); GOTO(err_fsd, rc = -EINVAL); } if (fsd->fsd_feature_rocompat & ~cpu_to_le32(FILTER_ROCOMPAT_SUPP)) { CERROR("read-only feature %x\n", le32_to_cpu(fsd->fsd_feature_rocompat) & ~FILTER_ROCOMPAT_SUPP); /* Do something like remount filesystem read-only */ GOTO(err_fsd, rc = -EINVAL); } CDEBUG(D_INODE, "%s: server last_rcvd : "LPU64"\n", obd->obd_name, le64_to_cpu(fsd->fsd_last_transno)); CDEBUG(D_INODE, "%s: server mount_count: "LPU64"\n", obd->obd_name, mount_count + 1); CDEBUG(D_INODE, "%s: server data size: %u\n", obd->obd_name, le32_to_cpu(fsd->fsd_server_size)); CDEBUG(D_INODE, "%s: per-client data start: %u\n", obd->obd_name, le32_to_cpu(fsd->fsd_client_start)); CDEBUG(D_INODE, "%s: per-client data size: %u\n", obd->obd_name, le32_to_cpu(fsd->fsd_client_size)); CDEBUG(D_INODE, "%s: server subdir_count: %u\n", obd->obd_name, le16_to_cpu(fsd->fsd_subdir_count)); CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", obd->obd_name, last_rcvd_size <= le32_to_cpu(fsd->fsd_client_start) ? 0 : (last_rcvd_size - le32_to_cpu(fsd->fsd_client_start)) / le16_to_cpu(fsd->fsd_client_size)); if (!obd->obd_replayable) { CWARN("%s: recovery support OFF\n", obd->obd_name); GOTO(out, rc = 0); } for (cl_idx = 0, off = le32_to_cpu(fsd->fsd_client_start); off < last_rcvd_size; cl_idx++) { __u64 last_rcvd; struct obd_export *exp; struct filter_export_data *fed; if (!fcd) { OBD_ALLOC(fcd, sizeof(*fcd)); if (!fcd) GOTO(err_client, rc = -ENOMEM); } /* Don't assume off is incremented properly by * fsfilt_read_record(), in case sizeof(*fcd) * isn't the same as fsd->fsd_client_size. */ off = le32_to_cpu(fsd->fsd_client_start) + cl_idx * le16_to_cpu(fsd->fsd_client_size); rc = fsfilt_read_record(obd, filp, fcd, sizeof(*fcd), &off); if (rc) { CERROR("error reading FILT %s idx %d off %llu: rc %d\n", LAST_RCVD, cl_idx, off, rc); break; /* read error shouldn't cause startup to fail */ } if (fcd->fcd_uuid[0] == '\0') { CDEBUG(D_INFO, "skipping zeroed client at offset %d\n", cl_idx); continue; } last_rcvd = le64_to_cpu(fcd->fcd_last_rcvd); /* These exports are cleaned up by filter_disconnect(), so they * need to be set up like real exports as filter_connect() does. */ exp = class_new_export(obd); CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64 " srv lr: "LPU64"\n", fcd->fcd_uuid, cl_idx, last_rcvd, le64_to_cpu(fsd->fsd_last_transno)); if (exp == NULL) GOTO(err_client, rc = -ENOMEM); memcpy(&exp->exp_client_uuid.uuid, fcd->fcd_uuid, sizeof exp->exp_client_uuid.uuid); fed = &exp->exp_filter_data; fed->fed_fcd = fcd; filter_client_add(obd, filter, fed, cl_idx); /* create helper if export init gets more complex */ spin_lock_init(&fed->fed_lock); fcd = NULL; exp->exp_replay_needed = 1; obd->obd_recoverable_clients++; obd->obd_max_recoverable_clients++; class_export_put(exp); CDEBUG(D_OTHER, "client at idx %d has last_rcvd = "LPU64"\n", cl_idx, last_rcvd); if (last_rcvd > le64_to_cpu(fsd->fsd_last_transno)) fsd->fsd_last_transno = cpu_to_le64(last_rcvd); } obd->obd_last_committed = le64_to_cpu(fsd->fsd_last_transno); if (obd->obd_recoverable_clients) { CWARN("RECOVERY: %d recoverable clients, last_rcvd " LPU64"\n", obd->obd_recoverable_clients, le64_to_cpu(fsd->fsd_last_transno)); obd->obd_next_recovery_transno = obd->obd_last_committed + 1; target_start_recovery_thread(obd, ost_handle); } if (fcd) OBD_FREE(fcd, sizeof(*fcd)); out: filter->fo_mount_count = mount_count + 1; fsd->fsd_mount_count = cpu_to_le64(filter->fo_mount_count); /* save it, so mount count and last_transno is current */ rc = filter_update_server_data(obd, filp, filter->fo_fsd, 1); RETURN(rc); err_client: class_disconnect_exports(obd, 0); err_fsd: filter_free_server_data(filter); RETURN(rc); } static int filter_cleanup_groups(struct obd_device *obd) { struct filter_obd *filter = &obd->u.filter; struct dentry *dentry; int i, k; ENTRY; for (i = 0; i < filter->fo_group_count; i++) { if (filter->fo_subdirs != NULL) { for (k = 0; k < filter->fo_subdir_count; k++) { dentry = filter->fo_subdirs[i].dentry[k]; if (dentry == NULL) continue; f_dput(dentry); filter->fo_subdirs[i].dentry[k] = NULL; } } if (filter->fo_last_objid_files[i] != NULL) { filp_close(filter->fo_last_objid_files[i], 0); filter->fo_last_objid_files[i] = NULL; } if (filter->fo_groups[i] != NULL) { dput(filter->fo_groups[i]); filter->fo_groups[i] = NULL; } } if (filter->fo_subdirs != NULL) OBD_FREE(filter->fo_subdirs, filter->fo_group_count * sizeof(*filter->fo_subdirs)); if (filter->fo_groups != NULL) OBD_FREE(filter->fo_groups, filter->fo_group_count * sizeof(*filter->fo_groups)); if (filter->fo_last_objids != NULL) OBD_FREE(filter->fo_last_objids, filter->fo_group_count * sizeof(__u64)); if (filter->fo_last_objid_files != NULL) OBD_FREE(filter->fo_last_objid_files, filter->fo_group_count * sizeof(struct file *)); f_dput(filter->fo_dentry_O); RETURN(0); } static int filter_update_last_group(struct obd_device *obd, int group) { struct filter_obd *filter = &obd->u.filter; struct file *filp = NULL; int last_group = 0, rc; loff_t off = 0; ENTRY; if (group <= filter->fo_committed_group) RETURN(0); filp = filp_open("LAST_GROUP", O_RDWR, 0700); if (IS_ERR(filp)) { rc = PTR_ERR(filp); filp = NULL; CERROR("cannot open LAST_GROUP: rc = %d\n", rc); GOTO(cleanup, rc); } rc = fsfilt_read_record(obd, filp, &last_group, sizeof(__u32), &off); if (rc) { CDEBUG(D_INODE, "error reading LAST_GROUP: rc %d\n",rc); GOTO(cleanup, rc); } LASSERT(off == 0 || last_group >= FILTER_MIN_GROUPS); CDEBUG(D_INODE, "%s: previous %d, new %d\n", obd->obd_name, last_group, group); off = 0; last_group = group; /* must be sync: bXXXX */ rc = fsfilt_write_record(obd, filp, &last_group, sizeof(__u32), &off, 1); if (rc) { CDEBUG(D_INODE, "error updating LAST_GROUP: rc %d\n", rc); GOTO(cleanup, rc); } filter->fo_committed_group = group; cleanup: if (filp) filp_close(filp, 0); RETURN(rc); } static int filter_read_group_internal(struct obd_device *obd, int group, int create) { struct filter_obd *filter = &obd->u.filter; __u64 *new_objids = NULL; struct filter_subdirs *new_subdirs = NULL, *tmp_subdirs = NULL; struct dentry **new_groups = NULL; struct file **new_files = NULL; struct dentry *dentry; struct file *filp; int old_count = filter->fo_group_count, rc, stage = 0, i; char name[25]; __u64 last_objid; loff_t off = 0; snprintf(name, 24, "%d", group); name[24] = '\0'; if (!create) { dentry = ll_lookup_one_len(name, filter->fo_dentry_O, strlen(name)); if (IS_ERR(dentry)) { CERROR("Cannot lookup expected object group %d: %ld\n", group, PTR_ERR(dentry)); RETURN(PTR_ERR(dentry)); } } else { dentry = simple_mkdir(filter->fo_dentry_O, name, 0700, 1); if (IS_ERR(dentry)) { CERROR("cannot lookup/create O/%s: rc = %ld\n", name, PTR_ERR(dentry)); RETURN(PTR_ERR(dentry)); } } stage = 1; snprintf(name, 24, "O/%d/LAST_ID", group); name[24] = '\0'; filp = filp_open(name, O_CREAT | O_RDWR, 0700); if (IS_ERR(filp)) { CERROR("cannot create %s: rc = %ld\n", name, PTR_ERR(filp)); GOTO(cleanup, rc = PTR_ERR(filp)); } stage = 2; rc = fsfilt_read_record(obd, filp, &last_objid, sizeof(__u64), &off); if (rc) { CDEBUG(D_INODE, "error reading %s: rc %d\n", name, rc); GOTO(cleanup, rc); } if (filter->fo_subdir_count) { OBD_ALLOC(tmp_subdirs, sizeof(*tmp_subdirs)); if (tmp_subdirs == NULL) GOTO(cleanup, rc = -ENOMEM); stage = 3; for (i = 0; i < filter->fo_subdir_count; i++) { char dir[20]; snprintf(dir, sizeof(dir), "d%u", i); tmp_subdirs->dentry[i] = simple_mkdir(dentry, dir, 0700, 1); if (IS_ERR(tmp_subdirs->dentry[i])) { rc = PTR_ERR(tmp_subdirs->dentry[i]); CERROR("can't lookup/create O/%d/%s: rc = %d\n", group, dir, rc); GOTO(cleanup, rc); } CDEBUG(D_INODE, "got/created O/%d/%s: %p\n", group, dir, tmp_subdirs->dentry[i]); } } /* 'group' is an index; we need an array of length 'group + 1' */ if (group + 1 > old_count) { int len = group + 1; OBD_ALLOC(new_objids, len * sizeof(*new_objids)); OBD_ALLOC(new_subdirs, len * sizeof(*new_subdirs)); OBD_ALLOC(new_groups, len * sizeof(*new_groups)); OBD_ALLOC(new_files, len * sizeof(*new_files)); stage = 4; if (new_objids == NULL || new_subdirs == NULL || new_groups == NULL || new_files == NULL) GOTO(cleanup, rc = -ENOMEM); memcpy(new_objids, filter->fo_last_objids, old_count * sizeof(*new_objids)); memcpy(new_subdirs, filter->fo_subdirs, old_count * sizeof(*new_subdirs)); memcpy(new_groups, filter->fo_groups, old_count * sizeof(*new_groups)); memcpy(new_files, filter->fo_last_objid_files, old_count * sizeof(*new_files)); if (old_count) { OBD_FREE(filter->fo_last_objids, old_count * sizeof(*new_objids)); OBD_FREE(filter->fo_subdirs, old_count * sizeof(*new_subdirs)); OBD_FREE(filter->fo_groups, old_count * sizeof(*new_groups)); OBD_FREE(filter->fo_last_objid_files, old_count * sizeof(*new_files)); } filter->fo_last_objids = new_objids; filter->fo_subdirs = new_subdirs; filter->fo_groups = new_groups; filter->fo_last_objid_files = new_files; filter->fo_group_count = len; } filter->fo_groups[group] = dentry; filter->fo_last_objid_files[group] = filp; if (filter->fo_subdir_count) { filter->fo_subdirs[group] = *tmp_subdirs; OBD_FREE(tmp_subdirs, sizeof(*tmp_subdirs)); } filter_update_last_group(obd, group); if (filp->f_dentry->d_inode->i_size == 0) { filter->fo_last_objids[group] = FILTER_INIT_OBJID; RETURN(0); } filter->fo_last_objids[group] = le64_to_cpu(last_objid); CDEBUG(D_INODE, "%s: server last_objid group %d: "LPU64"\n", obd->obd_name, group, last_objid); RETURN(0); cleanup: switch (stage) { case 4: if (new_objids != NULL) OBD_FREE(new_objids, group * sizeof(*new_objids)); if (new_subdirs != NULL) OBD_FREE(new_subdirs, group * sizeof(*new_subdirs)); if (new_groups != NULL) OBD_FREE(new_groups, group * sizeof(*new_groups)); if (new_files != NULL) OBD_FREE(new_files, group * sizeof(*new_files)); case 3: if (filter->fo_subdir_count) { for (i = 0; i < filter->fo_subdir_count; i++) { if (tmp_subdirs->dentry[i] != NULL) dput(tmp_subdirs->dentry[i]); } OBD_FREE(tmp_subdirs, sizeof(*tmp_subdirs)); } case 2: filp_close(filp, 0); case 1: dput(dentry); } RETURN(rc); } static int filter_read_groups(struct obd_device *obd, int last_group, int create) { struct filter_obd *filter = &obd->u.filter; int old_count, group, rc = 0; down(&filter->fo_init_lock); old_count = filter->fo_group_count; for (group = old_count; group <= last_group; group++) { if (group == 0) continue; /* no group zero */ rc = filter_read_group_internal(obd, group, create); if (rc != 0) break; } up(&filter->fo_init_lock); return rc; } static int filter_prep_groups(struct obd_device *obd) { struct filter_obd *filter = &obd->u.filter; struct dentry *dentry, *O_dentry; int rc = 0, cleanup_phase = 0; struct file *filp = NULL; int last_group; loff_t off = 0; ENTRY; O_dentry = simple_mkdir(current->fs->pwd, "O", 0700, 1); CDEBUG(D_INODE, "got/created O: %p\n", O_dentry); if (IS_ERR(O_dentry)) { rc = PTR_ERR(O_dentry); CERROR("cannot open/create O: rc = %d\n", rc); GOTO(cleanup, rc); } filter->fo_dentry_O = O_dentry; cleanup_phase = 1; /* O_dentry */ /* Lookup "R" to tell if we're on an old OST FS and need to convert * from O/R// to O/0//. This can be removed * some time post 1.0 when all old-style OSTs have converted along * with the init_objid hack. */ dentry = ll_lookup_one_len("R", O_dentry, 1); if (IS_ERR(dentry)) GOTO(cleanup, rc = PTR_ERR(dentry)); if (dentry->d_inode && S_ISDIR(dentry->d_inode->i_mode)) { struct dentry *O0_dentry = lookup_one_len("0", O_dentry, 1); ENTRY; CWARN("converting OST to new object layout\n"); if (IS_ERR(O0_dentry)) { rc = PTR_ERR(O0_dentry); CERROR("error looking up O/0: rc %d\n", rc); GOTO(cleanup_R, rc); } if (O0_dentry->d_inode) { CERROR("Both O/R and O/0 exist. Fix manually.\n"); GOTO(cleanup_O0, rc = -EEXIST); } down(&O_dentry->d_inode->i_sem); rc = vfs_rename(O_dentry->d_inode, dentry, O_dentry->d_inode, O0_dentry); up(&O_dentry->d_inode->i_sem); if (rc) { CERROR("error renaming O/R to O/0: rc %d\n", rc); GOTO(cleanup_O0, rc); } filter->fo_fsd->fsd_feature_incompat |= cpu_to_le32(FILTER_INCOMPAT_GROUPS); rc = filter_update_server_data(obd, filter->fo_rcvd_filp, filter->fo_fsd, 1); GOTO(cleanup_O0, rc); cleanup_O0: f_dput(O0_dentry); cleanup_R: f_dput(dentry); if (rc) GOTO(cleanup, rc); } else { f_dput(dentry); } cleanup_phase = 2; /* groups */ /* we have to initialize all groups before first connections from * clients because they may send create/destroy for any group -bzzz */ filp = filp_open("LAST_GROUP", O_CREAT | O_RDWR, 0700); if (IS_ERR(filp)) { CERROR("cannot create LAST_GROUP: rc = %ld\n", PTR_ERR(filp)); GOTO(cleanup, rc = PTR_ERR(filp)); } cleanup_phase = 3; /* filp */ rc = fsfilt_read_record(obd, filp, &last_group, sizeof(__u32), &off); if (rc) { CDEBUG(D_INODE, "error reading LAST_GROUP: rc %d\n", rc); GOTO(cleanup, rc); } if (off == 0) { last_group = FILTER_MIN_GROUPS; } else { LASSERT(last_group >= FILTER_MIN_GROUPS); } CWARN("%s: initialize groups [%d,%d]\n", obd->obd_name, FILTER_MIN_GROUPS, last_group); filter->fo_committed_group = last_group; rc = filter_read_groups(obd, last_group, 1); if (rc) GOTO(cleanup, rc); filp_close(filp, 0); RETURN(0); cleanup: switch (cleanup_phase) { case 3: filp_close(filp, 0); case 2: filter_cleanup_groups(obd); case 1: f_dput(filter->fo_dentry_O); filter->fo_dentry_O = NULL; default: break; } return rc; } /* setup the object store with correct subdirectories */ static int filter_prep(struct obd_device *obd) { struct lvfs_run_ctxt saved; struct filter_obd *filter = &obd->u.filter; struct file *file; struct inode *inode; int rc = 0; ENTRY; push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); file = filp_open(LAST_RCVD, O_RDWR | O_CREAT | O_LARGEFILE, 0700); if (!file || IS_ERR(file)) { rc = PTR_ERR(file); CERROR("OBD filter: cannot open/create %s: rc = %d\n", LAST_RCVD, rc); GOTO(out, rc); } 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); } /* steal operations */ inode = file->f_dentry->d_inode; filter->fo_fop = file->f_op; filter->fo_iop = inode->i_op; filter->fo_aops = inode->i_mapping->a_ops; rc = filter_init_server_data(obd, file); if (rc) { CERROR("cannot read %s: rc = %d\n", LAST_RCVD, rc); GOTO(err_filp, rc); } filter->fo_rcvd_filp = file; rc = filter_prep_groups(obd); if (rc) GOTO(err_server_data, rc); out: pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); return(rc); err_server_data: //class_disconnect_exports(obd, 0); filter_free_server_data(filter); err_filp: if (filp_close(file, 0)) CERROR("can't close %s after error\n", LAST_RCVD); filter->fo_rcvd_filp = NULL; goto out; } /* cleanup the filter: write last used object id to status file */ static void filter_post(struct obd_device *obd) { struct lvfs_run_ctxt saved; struct filter_obd *filter = &obd->u.filter; int rc, i; /* XXX: filter_update_lastobjid used to call fsync_dev. It might be * best to start a transaction with h_sync, because we removed this * from lastobjid */ push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); rc = filter_update_server_data(obd, filter->fo_rcvd_filp, filter->fo_fsd, 0); if (rc) CERROR("error writing server data: rc = %d\n", rc); for (i = 1; i < filter->fo_group_count; i++) { rc = filter_update_last_objid(obd, i, (i == filter->fo_group_count - 1)); if (rc) CERROR("error writing group %d lastobjid: rc = %d\n", i, rc); } rc = filp_close(filter->fo_rcvd_filp, 0); filter->fo_rcvd_filp = NULL; if (rc) CERROR("error closing %s: rc = %d\n", LAST_RCVD, rc); filter_cleanup_groups(obd); filter_free_server_data(filter); pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); } static void filter_set_last_id(struct filter_obd *filter, int group, obd_id id) { LASSERT(filter->fo_fsd != NULL); LASSERT(group > 0); LASSERT(group < filter->fo_group_count); spin_lock(&filter->fo_objidlock); filter->fo_last_objids[group] = id; spin_unlock(&filter->fo_objidlock); } __u64 filter_last_id(struct filter_obd *filter, int group) { obd_id id; LASSERT(filter->fo_fsd != NULL); LASSERT(group > 0); LASSERT(group < filter->fo_group_count); spin_lock(&filter->fo_objidlock); id = filter->fo_last_objids[group]; spin_unlock(&filter->fo_objidlock); return id; } /* direct cut-n-paste of mds_blocking_ast() */ static int filter_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc, void *data, int flag) { int do_ast; ENTRY; if (flag == LDLM_CB_CANCELING) { /* Don't need to do anything here. */ RETURN(0); } /* XXX layering violation! -phil */ l_lock(&lock->l_resource->lr_namespace->ns_lock); /* Get this: if filter_blocking_ast is racing with ldlm_intent_policy, * such that filter_blocking_ast is called just before l_i_p takes the * ns_lock, then by the time we get the lock, we might not be the * correct blocking function anymore. So check, and return early, if * so. */ if (lock->l_blocking_ast != filter_blocking_ast) { l_unlock(&lock->l_resource->lr_namespace->ns_lock); RETURN(0); } lock->l_flags |= LDLM_FL_CBPENDING; do_ast = (!lock->l_readers && !lock->l_writers); l_unlock(&lock->l_resource->lr_namespace->ns_lock); if (do_ast) { struct lustre_handle lockh; int rc; LDLM_DEBUG(lock, "already unused, calling ldlm_cli_cancel"); ldlm_lock2handle(lock, &lockh); rc = ldlm_cli_cancel(&lockh); if (rc < 0) CERROR("ldlm_cli_cancel: %d\n", rc); } else { LDLM_DEBUG(lock, "Lock still has references, will be " "cancelled later"); } RETURN(0); } extern void *lock_dir(struct inode *dir, struct qstr *name); extern void unlock_dir(struct inode *dir, void *lock); static void * filter_lock_dentry(struct obd_device *obd, struct dentry *dparent, obd_id id) { #ifdef S_PDIROPS struct qstr qstr; char name[32]; qstr.name = name; qstr.len = sprintf(name, LPU64, id); return lock_dir(dparent->d_inode, &qstr); #else down(&dparent->d_inode->i_sem); #endif return 0; } /* We never dget the object parent, so DON'T dput it either */ static void filter_parent_unlock(struct dentry *dparent, void *lock) { #ifdef S_PDIROPS LASSERT(lock != NULL); unlock_dir(dparent->d_inode, lock); #else up(&dparent->d_inode->i_sem); #endif } /* We never dget the object parent, so DON'T dput it either */ struct dentry *filter_parent(struct obd_device *obd, obd_gr group, obd_id objid) { struct filter_obd *filter = &obd->u.filter; LASSERT(group < filter->fo_group_count); LASSERT(group > 0); if (filter->fo_subdir_count == 0) return filter->fo_groups[group]; return filter->fo_subdirs[group].dentry[objid & (filter->fo_subdir_count - 1)]; } /* We never dget the object parent, so DON'T dput it either */ struct dentry *filter_parent_lock(struct obd_device *obd, obd_gr group, obd_id objid, void **lock) { unsigned long now = jiffies; struct dentry *dparent = filter_parent(obd, group, objid); if (IS_ERR(dparent)) return dparent; LASSERT(dparent); LASSERT(dparent->d_inode); *lock = filter_lock_dentry(obd, dparent, objid); if (time_after(jiffies, now + 15 * HZ)) CERROR("slow parent lock %lus\n", (jiffies - now) / HZ); return dparent; } /* How to get files, dentries, inodes from object id's. * * If dir_dentry is passed, the caller has already locked the parent * appropriately for this operation (normally a write lock). If * dir_dentry is NULL, we do a read lock while we do the lookup to * avoid races with create/destroy and such changing the directory * internal to the filesystem code. */ struct dentry *filter_fid2dentry(struct obd_device *obd, struct dentry *dir_dentry, obd_gr group, obd_id id) { struct dentry *dparent = dir_dentry; struct dentry *dchild; void *lock = NULL; char name[32]; int len; ENTRY; if (id == 0) { CERROR("fatal: invalid object id 0\n"); RETURN(ERR_PTR(-ESTALE)); } len = sprintf(name, LPU64, id); if (dir_dentry == NULL) { dparent = filter_parent_lock(obd, group, id, &lock); if (IS_ERR(dparent)) RETURN(dparent); } CDEBUG(D_INODE, "looking up object O/%*s/%s\n", dparent->d_name.len, dparent->d_name.name, name); dchild = /*ll_*/lookup_one_len(name, dparent, len); if (dir_dentry == NULL) filter_parent_unlock(dparent, lock); if (IS_ERR(dchild)) { CERROR("child lookup error %ld\n", PTR_ERR(dchild)); RETURN(dchild); } CDEBUG(D_INODE, "got child objid %s: %p, count = %d\n", name, dchild, atomic_read(&dchild->d_count)); LASSERT(atomic_read(&dchild->d_count) > 0); RETURN(dchild); } static int filter_prepare_destroy(struct obd_device *obd, obd_id objid, obd_id group) { struct lustre_handle lockh; int flags = LDLM_AST_DISCARD_DATA, rc; struct ldlm_res_id res_id = { .name = { objid, 0, group, 0 } }; ldlm_policy_data_t policy = { .l_extent = { 0, OBD_OBJECT_EOF } }; ENTRY; /* Tell the clients that the object is gone now and that they should * throw away any cached pages. */ rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, res_id, LDLM_EXTENT, &policy, LCK_PW, &flags, filter_blocking_ast, ldlm_completion_ast, NULL, NULL, NULL, 0, NULL, &lockh); /* We only care about the side-effects, just drop the lock. */ if (rc == ELDLM_OK) ldlm_lock_decref(&lockh, LCK_PW); RETURN(rc); } /* Caller must hold LCK_PW on parent and push us into kernel context. * Caller is also required to ensure that dchild->d_inode exists. */ static int filter_destroy_internal(struct obd_device *obd, obd_id objid, struct dentry *dparent, struct dentry *dchild) { struct inode *inode = dchild->d_inode; int rc; ENTRY; if (inode->i_nlink != 1 || atomic_read(&inode->i_count) != 1) { CERROR("destroying objid %*s nlink = %lu, count = %d\n", dchild->d_name.len, dchild->d_name.name, (unsigned long)inode->i_nlink, atomic_read(&inode->i_count)); } rc = vfs_unlink(dparent->d_inode, dchild); if (rc) CERROR("error unlinking objid %*s: rc %d\n", dchild->d_name.len, dchild->d_name.name, rc); RETURN(rc); } static int filter_intent_policy(struct ldlm_namespace *ns, struct ldlm_lock **lockp, void *req_cookie, ldlm_mode_t mode, int flags, void *data) { struct list_head rpc_list = LIST_HEAD_INIT(rpc_list); struct ptlrpc_request *req = req_cookie; struct ldlm_lock *lock = *lockp, *l = NULL; struct ldlm_resource *res = lock->l_resource; ldlm_processing_policy policy; struct ost_lvb *res_lvb, *reply_lvb; struct list_head *tmp; ldlm_error_t err; int tmpflags = 0, rc, repsize[2] = {sizeof(struct ldlm_reply), sizeof(struct ost_lvb) }; ENTRY; policy = ldlm_get_processing_policy(res); LASSERT(policy != NULL); LASSERT(req != NULL); rc = lustre_pack_reply(req, 2, repsize, NULL); if (rc) RETURN(req->rq_status = rc); reply_lvb = lustre_msg_buf(req->rq_repmsg, 1, sizeof(*reply_lvb)); LASSERT(reply_lvb != NULL); //fixup_handle_for_resent_req(req, lock, &lockh); /* If we grant any lock at all, it will be a whole-file read lock. * Call the extent policy function to see if our request can be * granted, or is blocked. */ lock->l_policy_data.l_extent.start = 0; lock->l_policy_data.l_extent.end = OBD_OBJECT_EOF; lock->l_req_mode = LCK_PR; l_lock(&res->lr_namespace->ns_lock); res->lr_tmp = &rpc_list; rc = policy(lock, &tmpflags, 0, &err); res->lr_tmp = NULL; /* FIXME: we should change the policy function slightly, to not make * this list at all, since we just turn around and free it */ while (!list_empty(&rpc_list)) { struct ldlm_ast_work *w = list_entry(rpc_list.next, struct ldlm_ast_work, w_list); list_del(&w->w_list); LDLM_LOCK_PUT(w->w_lock); OBD_FREE(w, sizeof(*w)); } if (rc == LDLM_ITER_CONTINUE) { /* The lock met with no resistance; we're finished. */ l_unlock(&res->lr_namespace->ns_lock); RETURN(ELDLM_LOCK_REPLACED); } /* Do not grant any lock, but instead send GL callbacks. The extent * policy nicely created a list of all PW locks for us. We will choose * the highest of those which are larger than the size in the LVB, if * any, and perform a glimpse callback. */ down(&res->lr_lvb_sem); res_lvb = res->lr_lvb_data; LASSERT(res_lvb != NULL); reply_lvb->lvb_size = res_lvb->lvb_size; reply_lvb->lvb_blocks = res_lvb->lvb_blocks; up(&res->lr_lvb_sem); list_for_each(tmp, &res->lr_granted) { struct ldlm_lock *tmplock = list_entry(tmp, struct ldlm_lock, l_res_link); if (tmplock->l_granted_mode == LCK_PR) continue; if (tmplock->l_policy_data.l_extent.end <= reply_lvb->lvb_size) continue; if (l == NULL) { l = LDLM_LOCK_GET(tmplock); continue; } if (l->l_policy_data.l_extent.start > tmplock->l_policy_data.l_extent.start) continue; LDLM_LOCK_PUT(l); l = LDLM_LOCK_GET(tmplock); } l_unlock(&res->lr_namespace->ns_lock); /* There were no PW locks beyond the size in the LVB; finished. */ if (l == NULL) RETURN(ELDLM_LOCK_ABORTED); LASSERT(l->l_glimpse_ast != NULL); rc = l->l_glimpse_ast(l, NULL); /* this will update the LVB */ if (rc != 0 && res->lr_namespace->ns_lvbo && res->lr_namespace->ns_lvbo->lvbo_update) { res->lr_namespace->ns_lvbo->lvbo_update(res, NULL, 0, 1); } down(&res->lr_lvb_sem); reply_lvb->lvb_size = res_lvb->lvb_size; reply_lvb->lvb_blocks = res_lvb->lvb_blocks; up(&res->lr_lvb_sem); LDLM_LOCK_PUT(l); RETURN(ELDLM_LOCK_ABORTED); } static int filter_post_fs_cleanup(struct obd_device *obd) { int rc = 0; rc = fsfilt_post_cleanup(obd); RETURN(rc); } static int filter_group_set_fs_flags(struct obd_device *obd, int group) { struct filter_obd *filter = &obd->u.filter; int rc = 0, i = 0; ENTRY; /* zero group is not longer valid. */ if (group== 0) RETURN(rc); for (i = 0; i < filter->fo_subdir_count; i++) { struct dentry *dentry; dentry = (filter->fo_subdirs + group)->dentry[i]; rc = fsfilt_set_fs_flags(obd, dentry->d_inode, SM_DO_REC | SM_DO_COW); if (rc) RETURN(rc); } RETURN(rc); } static int filter_post_fs_setup(struct obd_device *obd) { struct filter_obd *filter = &obd->u.filter; int rc = 0, j = 0; struct llog_ctxt *ctxt = NULL; rc = fsfilt_post_setup(obd, filter->fo_dentry_O); if (rc) RETURN(rc); for (j = 0; j < filter->fo_group_count; j++) { rc = filter_group_set_fs_flags(obd, j); if (rc) return rc; } fsfilt_get_reint_log_ctxt(obd, filter->fo_sb, &ctxt); if (ctxt) { ctxt->loc_obd = obd; ctxt->loc_idx = LLOG_REINT_ORIG_CTXT; obd->obd_llog_ctxt[LLOG_REINT_ORIG_CTXT] = ctxt; } fsfilt_set_ost_flags(obd, filter->fo_sb); return rc; } /* mount the file system (secretly) */ int filter_common_setup(struct obd_device *obd, obd_count len, void *buf, char *option) { struct lustre_cfg* lcfg = buf; struct filter_obd *filter = &obd->u.filter; struct vfsmount *mnt; char name[32] = "CATLIST"; int rc = 0, i; ENTRY; dev_clear_rdonly(2); if (!lcfg->lcfg_inlbuf1 || !lcfg->lcfg_inlbuf2) RETURN(-EINVAL); obd->obd_fsops = fsfilt_get_ops(lcfg->lcfg_inlbuf2); if (IS_ERR(obd->obd_fsops)) RETURN(PTR_ERR(obd->obd_fsops)); mnt = do_kern_mount(lcfg->lcfg_inlbuf2, MS_NOATIME | MS_NODIRATIME, lcfg->lcfg_inlbuf1, option); rc = PTR_ERR(mnt); if (IS_ERR(mnt)) GOTO(err_ops, rc); if (lcfg->lcfg_inllen3 > 0 && lcfg->lcfg_inlbuf3) { if (*lcfg->lcfg_inlbuf3 == 'f') { obd->obd_replayable = 1; obd_sync_filter = 1; CWARN("%s: recovery enabled\n", obd->obd_name); } else { if (*lcfg->lcfg_inlbuf3 != 'n') { CERROR("unrecognised flag '%c'\n", *lcfg->lcfg_inlbuf3); } // XXX Robert? Why do we get errors here // GOTO(err_mntput, rc = -EINVAL); } } filter->fo_vfsmnt = mnt; filter->fo_sb = mnt->mnt_sb; filter->fo_fstype = mnt->mnt_sb->s_type->name; CDEBUG(D_SUPER, "%s: mnt = %p\n", filter->fo_fstype, mnt); OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt); obd->obd_lvfs_ctxt.pwdmnt = mnt; obd->obd_lvfs_ctxt.pwd = mnt->mnt_root; obd->obd_lvfs_ctxt.fs = get_ds(); obd->obd_lvfs_ctxt.cb_ops = filter_lvfs_ops; rc = fsfilt_setup(obd, mnt->mnt_sb); if (rc) GOTO(err_mntput, rc); sema_init(&filter->fo_init_lock, 1); filter->fo_committed_group = 0; rc = filter_prep(obd); if (rc) GOTO(err_mntput, rc); filter->fo_destroys_in_progress = 0; for (i = 0; i < 32; i++) sema_init(&filter->fo_create_locks[i], 1); spin_lock_init(&filter->fo_translock); spin_lock_init(&filter->fo_objidlock); INIT_LIST_HEAD(&filter->fo_export_list); sema_init(&filter->fo_alloc_lock, 1); spin_lock_init(&filter->fo_r_pages.oh_lock); spin_lock_init(&filter->fo_w_pages.oh_lock); spin_lock_init(&filter->fo_r_discont_pages.oh_lock); spin_lock_init(&filter->fo_w_discont_pages.oh_lock); spin_lock_init(&filter->fo_r_discont_blocks.oh_lock); spin_lock_init(&filter->fo_w_discont_blocks.oh_lock); filter->fo_readcache_max_filesize = FILTER_MAX_CACHE_SIZE; INIT_LIST_HEAD(&filter->fo_llog_list); spin_lock_init(&filter->fo_llog_list_lock); obd->obd_namespace = ldlm_namespace_new("filter-tgt", LDLM_NAMESPACE_SERVER); if (obd->obd_namespace == NULL) GOTO(err_post, rc = -ENOMEM); obd->obd_namespace->ns_lvbp = obd; obd->obd_namespace->ns_lvbo = &filter_lvbo; ldlm_register_intent(obd->obd_namespace, filter_intent_policy); ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL, "filter_ldlm_cb_client", &obd->obd_ldlm_client); rc = obd_llog_cat_initialize(obd, &obd->obd_llogs, 1, name); if (rc) { CERROR("failed to setup llogging subsystems\n"); GOTO(err_post, rc); } RETURN(0); err_post: filter_post(obd); err_mntput: unlock_kernel(); mntput(mnt); filter->fo_sb = 0; lock_kernel(); err_ops: fsfilt_put_ops(obd->obd_fsops); return rc; } static int filter_attach(struct obd_device *obd, obd_count len, void *data) { struct lprocfs_static_vars lvars; int rc; lprocfs_init_vars(filter, &lvars); rc = lprocfs_obd_attach(obd, lvars.obd_vars); if (rc != 0) return rc; rc = lprocfs_alloc_obd_stats(obd, LPROC_FILTER_LAST); if (rc != 0) return rc; /* Init obdfilter private stats here */ lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_READ_BYTES, LPROCFS_CNTR_AVGMINMAX, "read_bytes", "bytes"); lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_WRITE_BYTES, LPROCFS_CNTR_AVGMINMAX, "write_bytes", "bytes"); return lproc_filter_attach_seqstat(obd); } static int filter_detach(struct obd_device *dev) { lprocfs_free_obd_stats(dev); return lprocfs_obd_detach(dev); } static int filter_setup(struct obd_device *obd, obd_count len, void *buf) { struct lustre_cfg* lcfg = buf; int rc; ENTRY; /* all mount options including errors=remount-ro and asyncdel are passed * using 4th lcfg param. And it is good, finally we have got rid of * hardcoded fs types in the code. */ rc = filter_common_setup(obd, len, buf, lcfg->lcfg_inlbuf4); if (rc) RETURN(rc); rc = filter_post_fs_setup(obd); RETURN(rc); } static int filter_cleanup(struct obd_device *obd, int flags) { struct filter_obd *filter = &obd->u.filter; ENTRY; if (flags & OBD_OPT_FAILOVER) CERROR("%s: shutting down for failover; client state will" " be preserved.\n", obd->obd_name); if (!list_empty(&obd->obd_exports)) { CERROR("%s: still has clients!\n", obd->obd_name); class_disconnect_exports(obd, flags); if (!list_empty(&obd->obd_exports)) { CERROR("still has exports after forced cleanup?\n"); RETURN(-EBUSY); } } ldlm_namespace_free(obd->obd_namespace, flags & OBD_OPT_FORCE); if (filter->fo_sb == NULL) RETURN(0); filter_post_fs_cleanup(obd); filter_post(obd); shrink_dcache_parent(filter->fo_sb->s_root); filter->fo_sb = 0; if (atomic_read(&filter->fo_vfsmnt->mnt_count) > 1) CERROR("%s: mount point %p busy, mnt_count: %d\n", obd->obd_name, filter->fo_vfsmnt, atomic_read(&filter->fo_vfsmnt->mnt_count)); unlock_kernel(); mntput(filter->fo_vfsmnt); //destroy_buffers(filter->fo_sb->s_dev); filter->fo_sb = NULL; fsfilt_put_ops(obd->obd_fsops); lock_kernel(); dev_clear_rdonly(2); RETURN(0); } static int filter_connect_post(struct obd_export *exp) { struct obd_device *obd = exp->exp_obd; struct filter_export_data *fed; char str[PTL_NALFMT_SIZE]; struct obd_llogs *llog; struct llog_ctxt *ctxt; int rc; ENTRY; fed = &exp->exp_filter_data; if (fed->fed_group < FILTER_MIN_GROUPS) RETURN(0); /* initialize llogs for connections from MDS */ llog = filter_grab_llog_for_group(obd, fed->fed_group, exp); LASSERT(llog != NULL); ctxt = llog_get_context(llog, LLOG_UNLINK_REPL_CTXT); LASSERT(ctxt != NULL); rc = llog_receptor_accept(ctxt, exp->exp_imp_reverse); portals_nid2str(exp->exp_connection->c_peer.peer_ni->pni_number, exp->exp_connection->c_peer.peer_id.nid, str); CDEBUG(D_OTHER, "%s: init llog ctxt for export "LPX64"/%s, group %d\n", obd->obd_name, exp->exp_connection->c_peer.peer_id.nid, str, fed->fed_group); RETURN(rc); } /* nearly identical to mds_connect */ static int filter_connect(struct lustre_handle *conn, struct obd_device *obd, struct obd_uuid *cluuid, unsigned long connect_flags) { struct obd_export *exp; struct filter_export_data *fed; struct filter_client_data *fcd = NULL; struct filter_obd *filter = &obd->u.filter; struct lvfs_run_ctxt saved; int rc, group; ENTRY; if (conn == NULL || obd == NULL || cluuid == NULL) RETURN(-EINVAL); rc = class_connect(conn, obd, cluuid); if (rc) RETURN(rc); exp = class_conn2export(conn); LASSERT(exp != NULL); fed = &exp->exp_filter_data; spin_lock_init(&fed->fed_lock); if (obd->obd_replayable) { OBD_ALLOC(fcd, sizeof(*fcd)); if (!fcd) { CERROR("filter: out of memory for client data\n"); GOTO(cleanup, rc = -ENOMEM); } memcpy(fcd->fcd_uuid, cluuid, sizeof(fcd->fcd_uuid)); fed->fed_fcd = fcd; rc = filter_client_add(obd, filter, fed, -1); if (rc) GOTO(cleanup, rc); } if (connect_flags == 0) GOTO(cleanup, rc); /* connection from MDS */ group = connect_flags; CWARN("%s: Received MDS connection ("LPX64"); group %d\n", obd->obd_name, exp->exp_handle.h_cookie, group); if (fed->fed_group != 0 && fed->fed_group != group) { char str[PTL_NALFMT_SIZE]; portals_nid2str(exp->exp_connection->c_peer.peer_ni->pni_number, exp->exp_connection->c_peer.peer_id.nid, str); CERROR("!!! This export (nid "LPX64"/%s) used object group %d " "earlier; now it's trying to use group %d! This could " "be a bug in the MDS. Tell CFS.\n", exp->exp_connection->c_peer.peer_id.nid, str, fed->fed_group, group); GOTO(cleanup, rc = -EPROTO); } fed->fed_group = group; push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); rc = filter_read_groups(obd, group, 1); pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); if (rc != 0) { CERROR("can't read group %u\n", group); GOTO(cleanup, rc); } rc = filter_group_set_fs_flags(obd, group); if (rc != 0) { CERROR("can't set kml flags %u\n", group); GOTO(cleanup, rc); } cleanup: if (rc) { if (fcd) OBD_FREE(fcd, sizeof(*fcd)); class_disconnect(exp, 0); } else { class_export_put(exp); } return rc; } static int filter_precleanup(struct obd_device *obd, int flags) { struct filter_group_llog *log; struct filter_obd *filter; int rc = 0; ENTRY; filter = &obd->u.filter; spin_lock(&filter->fo_llog_list_lock); while (!list_empty(&filter->fo_llog_list)) { log = list_entry(filter->fo_llog_list.next, struct filter_group_llog, list); list_del(&log->list); spin_unlock(&filter->fo_llog_list_lock); rc = obd_llog_finish(obd, log->llogs, 0); if (rc) CERROR("failed to cleanup llogging subsystem for %u\n", log->group); OBD_FREE(log->llogs, sizeof(*(log->llogs))); OBD_FREE(log, sizeof(*log)); spin_lock(&filter->fo_llog_list_lock); } spin_unlock(&filter->fo_llog_list_lock); rc = obd_llog_finish(obd, &obd->obd_llogs, 0); if (rc) CERROR("failed to cleanup llogging subsystem\n"); RETURN(rc); } /* Do extra sanity checks for grant accounting. We do this at connect, * disconnect, and statfs RPC time, so it shouldn't be too bad. We can * always get rid of it or turn it off when we know accounting is good. */ static void filter_grant_sanity_check(struct obd_device *obd, const char *func) { struct filter_export_data *fed; struct obd_export *exp; obd_size maxsize = obd->obd_osfs.os_blocks * obd->obd_osfs.os_bsize; obd_size tot_dirty = 0, tot_pending = 0, tot_granted = 0; obd_size fo_tot_dirty, fo_tot_pending, fo_tot_granted; if (list_empty(&obd->obd_exports)) return; spin_lock(&obd->obd_osfs_lock); spin_lock(&obd->obd_dev_lock); list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain) { fed = &exp->exp_filter_data; LASSERTF(fed->fed_grant + fed->fed_pending <= maxsize, "cli %s/%p %lu+%lu > "LPU64"\n", exp->exp_client_uuid.uuid, exp, fed->fed_grant, fed->fed_pending, maxsize); LASSERTF(fed->fed_dirty <= maxsize, "cli %s/%p %lu > "LPU64"\n", exp->exp_client_uuid.uuid, exp,fed->fed_dirty,maxsize); CDEBUG(D_CACHE,"%s: cli %s/%p dirty %lu pend %lu grant %lu\n", obd->obd_name, exp->exp_client_uuid.uuid, exp, fed->fed_dirty, fed->fed_pending, fed->fed_grant); tot_granted += fed->fed_grant + fed->fed_pending; tot_pending += fed->fed_pending; tot_dirty += fed->fed_dirty; } fo_tot_granted = obd->u.filter.fo_tot_granted; fo_tot_pending = obd->u.filter.fo_tot_pending; fo_tot_dirty = obd->u.filter.fo_tot_dirty; spin_unlock(&obd->obd_dev_lock); spin_unlock(&obd->obd_osfs_lock); /* Do these assertions outside the spinlocks so we don't kill system */ if (tot_granted != fo_tot_granted) CERROR("%s: tot_granted "LPU64" != fo_tot_granted "LPU64"\n", func, tot_granted, fo_tot_granted); if (tot_pending != fo_tot_pending) CERROR("%s: tot_pending "LPU64" != fo_tot_pending "LPU64"\n", func, tot_pending, fo_tot_pending); if (tot_dirty != fo_tot_dirty) CERROR("%s: tot_dirty "LPU64" != fo_tot_dirty "LPU64"\n", func, tot_dirty, fo_tot_dirty); if (tot_pending > tot_granted) CERROR("%s: tot_pending "LPU64" > tot_granted "LPU64"\n", func, tot_pending, tot_granted); if (tot_granted > maxsize) CERROR("%s: tot_granted "LPU64" > maxsize "LPU64"\n", func, tot_granted, maxsize); if (tot_dirty > maxsize) CERROR("%s: tot_dirty "LPU64" > maxsize "LPU64"\n", func, tot_dirty, maxsize); } /* Remove this client from the grant accounting totals. We also remove * the export from the obd device under the osfs and dev locks to ensure * that the filter_grant_sanity_check() calculations are always valid. * The client should do something similar when it invalidates its import. */ static void filter_grant_discard(struct obd_export *exp) { struct obd_device *obd = exp->exp_obd; struct filter_obd *filter = &obd->u.filter; struct filter_export_data *fed = &exp->exp_filter_data; spin_lock(&obd->obd_osfs_lock); spin_lock(&exp->exp_obd->obd_dev_lock); list_del_init(&exp->exp_obd_chain); spin_unlock(&exp->exp_obd->obd_dev_lock); CDEBUG(D_CACHE, "%s: cli %s/%p dirty %lu pend %lu grant %lu\n", obd->obd_name, exp->exp_client_uuid.uuid, exp, fed->fed_dirty, fed->fed_pending, fed->fed_grant); LASSERTF(filter->fo_tot_granted >= fed->fed_grant, "%s: tot_granted "LPU64" cli %s/%p fed_grant %lu\n", obd->obd_name, filter->fo_tot_granted, exp->exp_client_uuid.uuid, exp, fed->fed_grant); filter->fo_tot_granted -= fed->fed_grant; LASSERTF(exp->exp_obd->u.filter.fo_tot_pending >= fed->fed_pending, "%s: tot_pending "LPU64" cli %s/%p fed_pending %lu\n", obd->obd_name, filter->fo_tot_pending, exp->exp_client_uuid.uuid, exp, fed->fed_pending); LASSERTF(filter->fo_tot_dirty >= fed->fed_dirty, "%s: tot_dirty "LPU64" cli %s/%p fed_dirty %lu\n", obd->obd_name, filter->fo_tot_dirty, exp->exp_client_uuid.uuid, exp, fed->fed_dirty); filter->fo_tot_dirty -= fed->fed_dirty; fed->fed_dirty = 0; fed->fed_grant = 0; spin_unlock(&obd->obd_osfs_lock); } static int filter_destroy_export(struct obd_export *exp) { ENTRY; if (exp->exp_filter_data.fed_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_filter_data.fed_pending); target_destroy_export(exp); if (exp->exp_obd->obd_replayable) filter_client_free(exp, exp->exp_flags); filter_grant_discard(exp); if (!(exp->exp_flags & OBD_OPT_FORCE)) filter_grant_sanity_check(exp->exp_obd, __FUNCTION__); RETURN(0); } static void filter_sync_llogs(struct obd_device *obd, struct obd_export *dexp) { struct filter_group_llog *fglog, *nlog; struct filter_obd *filter; int worked = 0, group; struct llog_ctxt *ctxt; ENTRY; filter = &obd->u.filter; /* we can't sync log holding spinlock. also, we do not want to get * into livelock. so we do following: loop over MDS's exports in * group order and skip already synced llogs -bzzz */ do { /* look for group with min. number, but > worked */ fglog = NULL; group = 1 << 30; spin_lock(&filter->fo_llog_list_lock); list_for_each_entry(nlog, &filter->fo_llog_list, list) { if (nlog->group <= worked) { /* this group is already synced */ continue; } if (group < nlog->group) { /* we have group with smaller number to sync */ continue; } /* store current minimal group */ fglog = nlog; group = nlog->group; } spin_unlock(&filter->fo_llog_list_lock); if (fglog == NULL) break; worked = fglog->group; if (fglog->exp && (dexp == fglog->exp || dexp == NULL)) { ctxt = llog_get_context(fglog->llogs, LLOG_UNLINK_REPL_CTXT); LASSERT(ctxt != NULL); llog_sync(ctxt, fglog->exp); } } while (fglog != NULL); } /* also incredibly similar to mds_disconnect */ static int filter_disconnect(struct obd_export *exp, int flags) { struct obd_device *obd = exp->exp_obd; unsigned long irqflags; int rc; ENTRY; LASSERT(exp); class_export_get(exp); spin_lock_irqsave(&exp->exp_lock, irqflags); exp->exp_flags = flags; spin_unlock_irqrestore(&exp->exp_lock, irqflags); if (!(flags & OBD_OPT_FORCE)) filter_grant_sanity_check(obd, __FUNCTION__); filter_grant_discard(exp); /* Disconnect early so that clients can't keep using export */ rc = class_disconnect(exp, flags); ldlm_cancel_locks_for_export(exp); fsfilt_sync(obd, obd->u.filter.fo_sb); /* flush any remaining cancel messages out to the target */ filter_sync_llogs(obd, exp); class_export_put(exp); RETURN(rc); } struct dentry *__filter_oa2dentry(struct obd_device *obd, struct obdo *oa, const char *what) { struct dentry *dchild = NULL; obd_gr group = 0; if (oa->o_valid & OBD_MD_FLGROUP) group = oa->o_gr; dchild = filter_fid2dentry(obd, NULL, group, oa->o_id); if (IS_ERR(dchild)) { CERROR("%s error looking up object: "LPU64"\n", what, oa->o_id); RETURN(dchild); } if (dchild->d_inode == NULL) { CERROR("%s: %s on non-existent object: "LPU64"\n", obd->obd_name, what, oa->o_id); f_dput(dchild); RETURN(ERR_PTR(-ENOENT)); } return dchild; } static int filter_getattr(struct obd_export *exp, struct obdo *oa, struct lov_stripe_md *md) { struct dentry *dentry = NULL; struct obd_device *obd; int rc = 0; ENTRY; obd = class_exp2obd(exp); if (obd == NULL) { CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n", exp->exp_handle.h_cookie); RETURN(-EINVAL); } dentry = filter_oa2dentry(obd, oa); if (IS_ERR(dentry)) RETURN(PTR_ERR(dentry)); /* Limit the valid bits in the return data to what we actually use */ oa->o_valid = OBD_MD_FLID; obdo_from_inode(oa, dentry->d_inode, FILTER_VALID_FLAGS); f_dput(dentry); RETURN(rc); } /* this is called from filter_truncate() until we have filter_punch() */ static int filter_setattr(struct obd_export *exp, struct obdo *oa, struct lov_stripe_md *md, struct obd_trans_info *oti) { struct lvfs_run_ctxt saved; struct filter_obd *filter; struct dentry *dentry; struct iattr iattr; struct ldlm_res_id res_id = { .name = { oa->o_id, 0, oa->o_gr, 0 } }; struct ldlm_resource *res; void *handle; int rc, rc2; ENTRY; LASSERT(oti != NULL); dentry = filter_oa2dentry(exp->exp_obd, oa); if (IS_ERR(dentry)) RETURN(PTR_ERR(dentry)); filter = &exp->exp_obd->u.filter; iattr_from_obdo(&iattr, oa, oa->o_valid); push_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL); lock_kernel(); if (iattr.ia_valid & ATTR_SIZE) down(&dentry->d_inode->i_sem); handle = fsfilt_start(exp->exp_obd, dentry->d_inode, FSFILT_OP_SETATTR, oti); if (IS_ERR(handle)) GOTO(out_unlock, rc = PTR_ERR(handle)); /* XXX this could be a rwsem instead, if filter_preprw played along */ if (iattr.ia_valid & ATTR_ATTR_FLAG) rc = fsfilt_iocontrol(exp->exp_obd, dentry->d_inode, NULL, EXT3_IOC_SETFLAGS, (long)&iattr.ia_attr_flags); else rc = fsfilt_setattr(exp->exp_obd, dentry, handle, &iattr, 1); rc = filter_finish_transno(exp, oti, rc); rc2 = fsfilt_commit(exp->exp_obd, filter->fo_sb, dentry->d_inode, handle, 0); if (rc2) { CERROR("error on commit, err = %d\n", rc2); if (!rc) rc = rc2; } if (iattr.ia_valid & ATTR_SIZE) { res = ldlm_resource_get(exp->exp_obd->obd_namespace, NULL, res_id, LDLM_EXTENT, 0); if (res == NULL) { CERROR("!!! resource_get failed for object "LPU64" -- " "filter_setattr with no lock?\n", oa->o_id); } else { if (res->lr_namespace->ns_lvbo && res->lr_namespace->ns_lvbo->lvbo_update) { rc = res->lr_namespace->ns_lvbo->lvbo_update (res, NULL, 0, 0); } ldlm_resource_putref(res); } } oa->o_valid = OBD_MD_FLID; obdo_from_inode(oa, dentry->d_inode, FILTER_VALID_FLAGS); out_unlock: if (iattr.ia_valid & ATTR_SIZE) up(&dentry->d_inode->i_sem); unlock_kernel(); pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL); f_dput(dentry); RETURN(rc); } /* XXX identical to osc_unpackmd */ static int filter_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp, struct lov_mds_md *lmm, int lmm_bytes) { int lsm_size; ENTRY; if (lmm != NULL) { if (lmm_bytes < sizeof (*lmm)) { CERROR("lov_mds_md too small: %d, need %d\n", lmm_bytes, (int)sizeof(*lmm)); RETURN(-EINVAL); } /* XXX LOV_MAGIC etc check? */ if (lmm->lmm_object_id == cpu_to_le64(0)) { CERROR("lov_mds_md: zero lmm_object_id\n"); RETURN(-EINVAL); } } lsm_size = lov_stripe_md_size(1); if (lsmp == NULL) RETURN(lsm_size); if (*lsmp != NULL && lmm == NULL) { OBD_FREE(*lsmp, lsm_size); *lsmp = NULL; RETURN(0); } if (*lsmp == NULL) { OBD_ALLOC(*lsmp, lsm_size); if (*lsmp == NULL) RETURN(-ENOMEM); loi_init((*lsmp)->lsm_oinfo); } if (lmm != NULL) { /* XXX zero *lsmp? */ (*lsmp)->lsm_object_id = le64_to_cpu (lmm->lmm_object_id); LASSERT((*lsmp)->lsm_object_id); } (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES; RETURN(lsm_size); } static void filter_destroy_precreated(struct obd_export *exp, struct obdo *oa, struct filter_obd *filter) { struct obdo doa = { 0, }; /* XXX obdo on stack */ __u64 last, id; ENTRY; LASSERT(oa); LASSERT(oa->o_valid & OBD_MD_FLGROUP); LASSERT(oa->o_gr != 0); doa.o_mode = S_IFREG; doa.o_gr = oa->o_gr; doa.o_valid = oa->o_valid & (OBD_MD_FLGROUP | OBD_MD_FLID); set_bit(doa.o_gr, &filter->fo_destroys_in_progress); down(&filter->fo_create_locks[doa.o_gr]); if (!test_bit(doa.o_gr, &filter->fo_destroys_in_progress)) { CERROR("%s:["LPU64"] destroy_in_progress already cleared\n", exp->exp_obd->obd_name, doa.o_gr); up(&filter->fo_create_locks[doa.o_gr]); EXIT; return; } last = filter_last_id(filter, doa.o_gr); CWARN("%s:["LPU64"] deleting orphan objects from "LPU64" to "LPU64"\n", exp->exp_obd->obd_name, doa.o_gr, oa->o_id + 1, last); for (id = oa->o_id + 1; id <= last; id++) { doa.o_id = id; filter_destroy(exp, &doa, NULL, NULL); } CDEBUG(D_HA, "%s:["LPU64"] after destroy: set last_objids = "LPU64"\n", exp->exp_obd->obd_name, doa.o_gr, oa->o_id); filter_set_last_id(filter, doa.o_gr, oa->o_id); clear_bit(doa.o_gr, &filter->fo_destroys_in_progress); up(&filter->fo_create_locks[doa.o_gr]); EXIT; } /* returns a negative error or a nonnegative number of files to create */ static int filter_should_precreate(struct obd_export *exp, struct obdo *oa, obd_gr group) { struct obd_device *obd = exp->exp_obd; struct filter_obd *filter = &obd->u.filter; int diff, rc; ENTRY; diff = oa->o_id - filter_last_id(filter, oa->o_gr); CDEBUG(D_INFO, "filter_last_id() = "LPU64" -> diff = %d\n", filter_last_id(filter, oa->o_gr), diff); /* delete orphans request */ if ((oa->o_valid & OBD_MD_FLFLAGS) && (oa->o_flags & OBD_FL_DELORPHAN)) { if (diff >= 0) RETURN(diff); if (-diff > 10000) { /* XXX make this smarter */ CERROR("ignoring bogus orphan destroy request: obdid " LPU64" last_id "LPU64"\n", oa->o_id, filter_last_id(filter, oa->o_gr)); RETURN(-EINVAL); } filter_destroy_precreated(exp, oa, filter); rc = filter_update_last_objid(obd, group, 0); if (rc) CERROR("unable to write lastobjid, but orphans" "were deleted\n"); RETURN(0); } else { /* only precreate if group == 0 and o_id is specfied */ if (!(oa->o_valid & OBD_FL_DELORPHAN) && (/*group != 0 ||*/ oa->o_id == 0)) RETURN(1); LASSERT(diff >= 0); RETURN(diff); } } static int filter_precreate_rec(struct obd_device *obd, struct dentry *dentry, int *number, struct obdo *oa) { int rc; ENTRY; rc = fsfilt_precreate_rec(obd, dentry, number, oa); RETURN(rc); } /* We rely on the fact that only one thread will be creating files in a given * group at a time, which is why we don't need an atomic filter_get_new_id. * Even if we had that atomic function, the following race would exist: * * thread 1: gets id x from filter_next_id * thread 2: gets id (x + 1) from filter_next_id * thread 2: creates object (x + 1) * thread 1: tries to create object x, gets -ENOSPC */ static int filter_precreate(struct obd_device *obd, struct obdo *oa, obd_gr group, int *num) { struct dentry *dchild = NULL, *dparent = NULL; struct filter_obd *filter; int err = 0, rc = 0, recreate_obj = 0, i; __u64 next_id; void *handle = NULL; void *lock = NULL; ENTRY; filter = &obd->u.filter; if ((oa->o_valid & OBD_MD_FLFLAGS) && (oa->o_flags & OBD_FL_RECREATE_OBJS)) { recreate_obj = 1; } CDEBUG(D_HA, "%s: precreating %d objects\n", obd->obd_name, *num); down(&filter->fo_create_locks[group]); for (i = 0; i < *num && err == 0; i++) { int cleanup_phase = 0; if (test_bit(group, &filter->fo_destroys_in_progress)) { CWARN("%s: precreate aborted by destroy\n", obd->obd_name); break; } if (recreate_obj) { __u64 last_id; next_id = oa->o_id; last_id = filter_last_id(filter, group); if (next_id > last_id) { CERROR("Error: Trying to recreate obj greater" "than last id "LPD64" > "LPD64"\n", next_id, last_id); GOTO(cleanup, rc = -EINVAL); } } else { next_id = filter_last_id(filter, group) + 1; } CDEBUG(D_INFO, "precreate objid "LPU64"\n", next_id); dparent = filter_parent_lock(obd, group, next_id, &lock); if (IS_ERR(dparent)) GOTO(cleanup, rc = PTR_ERR(dparent)); cleanup_phase = 1; /*only do precreate rec record. so clean kml flags here*/ fsfilt_clear_fs_flags(obd, dparent->d_inode, SM_DO_REC); dchild = filter_fid2dentry(obd, dparent, group, next_id); if (IS_ERR(dchild)) GOTO(cleanup, rc = PTR_ERR(dchild)); cleanup_phase = 2; if (dchild->d_inode != NULL) { /* This would only happen if lastobjid was bad on disk*/ /* Could also happen if recreating missing obj but * already exists */ if (recreate_obj) { CERROR("%s: Serious error: recreating obj %*s " "but obj already exists \n", obd->obd_name, dchild->d_name.len, dchild->d_name.name); LBUG(); } else { CERROR("%s: Serious error: objid %*s already " "exists; is this filesystem corrupt?\n", obd->obd_name, dchild->d_name.len, dchild->d_name.name); LBUG(); } GOTO(cleanup, rc = -EEXIST); } handle = fsfilt_start_log(obd, dparent->d_inode, FSFILT_OP_CREATE, NULL, 1); if (IS_ERR(handle)) GOTO(cleanup, rc = PTR_ERR(handle)); cleanup_phase = 3; rc = ll_vfs_create(dparent->d_inode, dchild, S_IFREG, NULL); if (rc) { CERROR("create failed rc = %d\n", rc); GOTO(cleanup, rc); } if (!recreate_obj) { filter_set_last_id(filter, group, next_id); err = filter_update_last_objid(obd, group, 0); if (err) CERROR("unable to write lastobjid " "but file created\n"); } fsfilt_set_fs_flags(obd, dparent->d_inode, SM_DO_REC); cleanup: switch(cleanup_phase) { case 3: err = fsfilt_commit(obd, filter->fo_sb, dparent->d_inode, handle, 0); if (err) { CERROR("error on commit, err = %d\n", err); if (!rc) rc = err; } case 2: f_dput(dchild); case 1: filter_parent_unlock(dparent, lock); case 0: break; } if (rc) break; } *num = i; /* check if we have an error after ll_vfs_create(). It is possible that * there will be say -ENOSPC and we will leak it. */ if (rc == 0) rc = filter_precreate_rec(obd, dparent, num, oa); up(&filter->fo_create_locks[group]); CDEBUG(D_HA, "%s: server last_objid for group "LPU64": "LPU64"\n", obd->obd_name, group, filter->fo_last_objids[group]); CDEBUG(D_HA, "%s: filter_precreate() created %d objects\n", obd->obd_name, i); RETURN(rc); } static int filter_create(struct obd_export *exp, struct obdo *oa, struct lov_stripe_md **ea, struct obd_trans_info *oti) { struct obd_device *obd = NULL; struct filter_obd *filter; struct lvfs_run_ctxt saved; struct lov_stripe_md *lsm = NULL; struct filter_export_data *fed; char str[PTL_NALFMT_SIZE]; int group = oa->o_gr, rc = 0, diff, recreate_objs = 0; ENTRY; if (!(oa->o_valid & OBD_MD_FLGROUP) || group == 0) { portals_nid2str(exp->exp_connection->c_peer.peer_ni->pni_number, exp->exp_connection->c_peer.peer_id.nid, str); CERROR("!!! nid "LPX64"/%s sent invalid object group %d\n", exp->exp_connection->c_peer.peer_id.nid, str, group); RETURN(-EINVAL); } if ((oa->o_valid & OBD_MD_FLFLAGS) && (oa->o_flags & OBD_FL_RECREATE_OBJS)) { recreate_objs = 1; } obd = exp->exp_obd; fed = &exp->exp_filter_data; filter = &obd->u.filter; if (fed->fed_group != group && !recreate_objs && !(oa->o_valid & OBD_MD_REINT)) { portals_nid2str(exp->exp_connection->c_peer.peer_ni->pni_number, exp->exp_connection->c_peer.peer_id.nid, str); CERROR("!!! This export (nid "LPX64"/%s) used object group %d " "earlier; now it's trying to use group %d! This could " "be a bug in the MDS. Tell CFS.\n", exp->exp_connection->c_peer.peer_id.nid, str, fed->fed_group, group); RETURN(-ENOTUNIQ); } CDEBUG(D_INFO, "filter_create(od->o_gr=%d,od->o_id="LPU64")\n", group, oa->o_id); if (ea != NULL) { lsm = *ea; if (lsm == NULL) { rc = obd_alloc_memmd(exp, &lsm); if (rc < 0) RETURN(rc); } } obd = exp->exp_obd; push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); if (oa->o_valid & OBD_MD_REINT) { int num = *((int*)oa->o_inline); rc = filter_precreate(obd, oa, oa->o_gr, &num); } else if (recreate_objs) { if (oa->o_id > filter_last_id(&obd->u.filter, group)) { CERROR("recreate objid "LPU64" > last id "LPU64"\n", oa->o_id, filter_last_id(&obd->u.filter, group)); rc = -EINVAL; } else { diff = 1; rc = filter_precreate(obd, oa, group, &diff); } } else { diff = filter_should_precreate(exp, oa, group); if (diff > 0) { oa->o_id = filter_last_id(&obd->u.filter, group); rc = filter_precreate(obd, oa, group, &diff); oa->o_id += diff; oa->o_valid = OBD_MD_FLID; } } pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); if (rc && ea != NULL && *ea != lsm) { obd_free_memmd(exp, &lsm); } else if (rc == 0 && ea != NULL) { /* XXX LOV STACKING: the lsm that is passed to us from * LOV does not have valid lsm_oinfo data structs, so * don't go touching that. This needs to be fixed in a * big way. */ lsm->lsm_object_id = oa->o_id; lsm->lsm_object_gr = oa->o_gr; *ea = lsm; } RETURN(rc); } static int filter_destroy(struct obd_export *exp, struct obdo *oa, struct lov_stripe_md *ea, struct obd_trans_info *oti) { struct obd_device *obd; struct filter_obd *filter; struct dentry *dchild = NULL, *dparent = NULL; struct lvfs_run_ctxt saved; void *handle = NULL; struct llog_cookie *fcc = NULL; int rc, rc2, cleanup_phase = 0, have_prepared = 0; void *lock = NULL; ENTRY; LASSERT(oa->o_valid & OBD_MD_FLGROUP); obd = exp->exp_obd; filter = &obd->u.filter; push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); acquire_locks: dparent = filter_parent_lock(obd, oa->o_gr, oa->o_id, &lock); if (IS_ERR(dparent)) GOTO(cleanup, rc = PTR_ERR(dparent)); cleanup_phase = 1; dchild = filter_fid2dentry(obd, dparent, oa->o_gr, oa->o_id); if (IS_ERR(dchild)) GOTO(cleanup, rc = -ENOENT); cleanup_phase = 2; if (dchild->d_inode == NULL) { CDEBUG(D_INODE, "destroying non-existent object "LPU64"\n", oa->o_id); GOTO(cleanup, rc = -ENOENT); } if (!have_prepared) { /* If we're really going to destroy the object, get ready * by getting the clients to discard their cached data. * * We have to drop the parent lock, because * filter_prepare_destroy will acquire a PW on the object, and * we don't want to deadlock with an incoming write to the * object, which has the extent PW and then wants to get the * parent dentry to do the lookup. * * We dput the child because it's not worth the extra * complication of condition the above code to skip it on the * second time through. */ f_dput(dchild); filter_parent_unlock(dparent, lock); filter_prepare_destroy(obd, oa->o_id, oa->o_gr); have_prepared = 1; goto acquire_locks; } handle = fsfilt_start_log(obd, dparent->d_inode, FSFILT_OP_UNLINK, oti, 1); if (IS_ERR(handle)) GOTO(cleanup, rc = PTR_ERR(handle)); cleanup_phase = 3; /* Our MDC connection is established by the MDS to us */ if (oa->o_valid & OBD_MD_FLCOOKIE) { OBD_ALLOC(fcc, sizeof(*fcc)); if (fcc != NULL) memcpy(fcc, obdo_logcookie(oa), sizeof(*fcc)); } rc = filter_destroy_internal(obd, oa->o_id, dparent, dchild); cleanup: switch(cleanup_phase) { case 3: if (fcc != NULL) { if (oti != NULL) fsfilt_add_journal_cb(obd, filter->fo_sb, 0, oti->oti_handle, filter_cancel_cookies_cb, fcc); else fsfilt_add_journal_cb(obd, filter->fo_sb, 0, handle, filter_cancel_cookies_cb, fcc); } rc = filter_finish_transno(exp, oti, rc); rc2 = fsfilt_commit(obd, filter->fo_sb, dparent->d_inode, handle, 0); if (rc2) { CERROR("error on commit, err = %d\n", rc2); if (!rc) rc = rc2; } case 2: f_dput(dchild); case 1: filter_parent_unlock(dparent, lock); case 0: pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); break; default: CERROR("invalid cleanup_phase %d\n", cleanup_phase); LBUG(); } RETURN(rc); } /* NB start and end are used for punch, but not truncate */ static int filter_truncate(struct obd_export *exp, struct obdo *oa, struct lov_stripe_md *lsm, obd_off start, obd_off end, struct obd_trans_info *oti) { int error; ENTRY; if (end != OBD_OBJECT_EOF) CERROR("PUNCH not supported, only truncate: end = "LPX64"\n", end); CDEBUG(D_INODE, "calling truncate for object "LPU64", valid = %x, " "o_size = "LPD64"\n", oa->o_id, oa->o_valid, start); oa->o_size = start; error = filter_setattr(exp, oa, NULL, oti); RETURN(error); } static int filter_sync(struct obd_export *exp, struct obdo *oa, struct lov_stripe_md *lsm, obd_off start, obd_off end) { struct obd_device *obd = exp->exp_obd; struct lvfs_run_ctxt saved; struct filter_obd *filter; struct dentry *dentry; int rc, rc2; ENTRY; filter = &obd->u.filter; /* an objid of zero is taken to mean "sync whole filesystem" */ if (!oa || !(oa->o_valid & OBD_MD_FLID)) { rc = fsfilt_sync(obd, filter->fo_sb); /* flush any remaining cancel messages out to the target */ filter_sync_llogs(obd, NULL); RETURN(rc); } dentry = filter_oa2dentry(obd, oa); if (IS_ERR(dentry)) RETURN(PTR_ERR(dentry)); push_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL); down(&dentry->d_inode->i_sem); rc = filemap_fdatasync(dentry->d_inode->i_mapping); if (rc == 0) { /* just any file to grab fsync method - "file" arg unused */ struct file *file = filter->fo_rcvd_filp; if (file->f_op && file->f_op->fsync) rc = file->f_op->fsync(NULL, dentry, 1); rc2 = filemap_fdatawait(dentry->d_inode->i_mapping); if (!rc) rc = rc2; } up(&dentry->d_inode->i_sem); oa->o_valid = OBD_MD_FLID; obdo_from_inode(oa, dentry->d_inode, FILTER_VALID_FLAGS); pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL); f_dput(dentry); RETURN(rc); } static int filter_statfs(struct obd_device *obd, struct obd_statfs *osfs, unsigned long max_age) { struct filter_obd *filter = &obd->u.filter; int blockbits = filter->fo_sb->s_blocksize_bits; int rc; ENTRY; /* at least try to account for cached pages. its still racey and * might be under-reporting if clients haven't announced their * caches with brw recently */ spin_lock(&obd->obd_osfs_lock); rc = fsfilt_statfs(obd, filter->fo_sb, max_age); memcpy(osfs, &obd->obd_osfs, sizeof(*osfs)); spin_unlock(&obd->obd_osfs_lock); CDEBUG(D_SUPER | D_CACHE, "blocks cached "LPU64" granted "LPU64 " pending "LPU64" free "LPU64" avail "LPU64"\n", filter->fo_tot_dirty, filter->fo_tot_granted, filter->fo_tot_pending, osfs->os_bfree << blockbits, osfs->os_bavail << blockbits); filter_grant_sanity_check(obd, __FUNCTION__); osfs->os_bavail -= min(osfs->os_bavail, (filter->fo_tot_dirty + filter->fo_tot_pending + osfs->os_bsize -1) >> blockbits); RETURN(rc); } static int filter_get_info(struct obd_export *exp, __u32 keylen, void *key, __u32 *vallen, void *val) { struct filter_export_data *fed = &exp->exp_filter_data; struct obd_device *obd; ENTRY; obd = class_exp2obd(exp); if (obd == NULL) { CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n", exp->exp_handle.h_cookie); RETURN(-EINVAL); } if (keylen == strlen("blocksize") && memcmp(key, "blocksize", keylen) == 0) { __u32 *blocksize = val; *vallen = sizeof(*blocksize); *blocksize = obd->u.filter.fo_sb->s_blocksize; RETURN(0); } if (keylen == strlen("blocksize_bits") && memcmp(key, "blocksize_bits", keylen) == 0) { __u32 *blocksize_bits = val; *vallen = sizeof(*blocksize_bits); *blocksize_bits = obd->u.filter.fo_sb->s_blocksize_bits; RETURN(0); } if (keylen >= strlen("last_id") && memcmp(key, "last_id", 7) == 0) { obd_id *last_id = val; *last_id = filter_last_id(&obd->u.filter, fed->fed_group); RETURN(0); } if (keylen >= strlen("reint_log") && memcmp(key, "reint_log", 9) == 0) { /*Get log_context handle*/ unsigned long *llh_handle = val; *vallen = sizeof(unsigned long); *llh_handle = (unsigned long)obd->obd_llog_ctxt[LLOG_REINT_ORIG_CTXT]; RETURN(0); } if (keylen >= strlen("cache_sb") && memcmp(key, "cache_sb", 8) == 0) { /*Get log_context handle*/ unsigned long *sb = val; *vallen = sizeof(unsigned long); *sb = (unsigned long)obd->u.filter.fo_sb; RETURN(0); } CDEBUG(D_IOCTL, "invalid key\n"); RETURN(-EINVAL); } struct obd_llogs *filter_grab_llog_for_group(struct obd_device *obd, int group, struct obd_export *export) { struct filter_group_llog *fglog, *nlog; char name[32] = "CATLIST"; struct filter_obd *filter; struct llog_ctxt *ctxt; struct list_head *cur; int rc; filter = &obd->u.filter; spin_lock(&filter->fo_llog_list_lock); list_for_each(cur, &filter->fo_llog_list) { fglog = list_entry(cur, struct filter_group_llog, list); if (fglog->group == group) { if (!(fglog->exp == NULL || fglog->exp == export || export == NULL)) CWARN("%s: export for group %d changes: 0x%p -> 0x%p\n", obd->obd_name, group, fglog->exp, export); spin_unlock(&filter->fo_llog_list_lock); goto init; } } spin_unlock(&filter->fo_llog_list_lock); if (export == NULL) RETURN(NULL); OBD_ALLOC(fglog, sizeof(*fglog)); if (fglog == NULL) RETURN(NULL); fglog->group = group; OBD_ALLOC(fglog->llogs, sizeof(struct obd_llogs)); if (fglog->llogs == NULL) { OBD_FREE(fglog, sizeof(*fglog)); RETURN(NULL); } spin_lock(&filter->fo_llog_list_lock); list_for_each(cur, &filter->fo_llog_list) { nlog = list_entry(cur, struct filter_group_llog, list); LASSERT(nlog->group != group); } list_add(&fglog->list, &filter->fo_llog_list); spin_unlock(&filter->fo_llog_list_lock); rc = obd_llog_cat_initialize(obd, fglog->llogs, 1, name); if (rc) { OBD_FREE(fglog->llogs, sizeof(*(fglog->llogs))); OBD_FREE(fglog, sizeof(*fglog)); RETURN(NULL); } init: if (export) { fglog->exp = export; ctxt = llog_get_context(fglog->llogs, LLOG_UNLINK_REPL_CTXT); LASSERT(ctxt != NULL); llog_receptor_accept(ctxt, export->exp_imp_reverse); } CDEBUG(D_OTHER, "%s: new llog 0x%p for group %u\n", obd->obd_name, fglog->llogs, group); RETURN(fglog->llogs); } int filter_iocontrol(unsigned int cmd, struct obd_export *exp, int len, void *karg, void *uarg) { struct obd_device *obd = exp->exp_obd; struct obd_ioctl_data *data = karg; int rc = 0; switch (cmd) { case OBD_IOC_ABORT_RECOVERY: target_stop_recovery_thread(obd); RETURN(0); case OBD_IOC_SET_READONLY: { void *handle; struct super_block *sb = obd->u.filter.fo_sb; struct inode *inode = sb->s_root->d_inode; BDEVNAME_DECLARE_STORAGE(tmp); CERROR("setting device %s read-only\n", ll_bdevname(sb, tmp)); handle = fsfilt_start(obd, inode, FSFILT_OP_MKNOD, NULL); LASSERT(handle); (void)fsfilt_commit(obd, sb, inode, handle, 1); dev_set_rdonly(ll_sbdev(obd->u.filter.fo_sb), 2); RETURN(0); } case OBD_IOC_CATLOGLIST: { rc = llog_catalog_list(obd, 1, data); RETURN(rc); } case OBD_IOC_LLOG_CANCEL: case OBD_IOC_LLOG_REMOVE: case OBD_IOC_LLOG_INFO: case OBD_IOC_LLOG_PRINT: { /* FIXME to be finished */ RETURN(-EOPNOTSUPP); /* struct llog_ctxt *ctxt = NULL; push_ctxt(&saved, &ctxt->loc_ctxt, NULL); rc = llog_ioctl(ctxt, cmd, data); pop_ctxt(&saved, &ctxt->loc_ctxt, NULL); RETURN(rc); */ } default: RETURN(-EINVAL); } RETURN(0); } static struct llog_operations filter_unlink_repl_logops; static struct llog_operations filter_size_orig_logops = { lop_setup: llog_obd_origin_setup, lop_cleanup: llog_catalog_cleanup, lop_add: llog_catalog_add, }; static int filter_llog_init(struct obd_device *obd, struct obd_llogs *llogs, struct obd_device *tgt, int count, struct llog_catid *catid) { struct llog_ctxt *ctxt; int rc; ENTRY; filter_unlink_repl_logops = llog_client_ops; filter_unlink_repl_logops.lop_cancel = llog_obd_repl_cancel; filter_unlink_repl_logops.lop_connect = llog_repl_connect; filter_unlink_repl_logops.lop_sync = llog_obd_repl_sync; rc = obd_llog_setup(obd, llogs, LLOG_UNLINK_REPL_CTXT, tgt, 0, NULL, &filter_unlink_repl_logops); if (rc) RETURN(rc); /* FIXME - assign unlink_cb for filter's recovery */ ctxt = llog_get_context(llogs, LLOG_UNLINK_REPL_CTXT); ctxt->llog_proc_cb = filter_recov_log_unlink_cb; /* FIXME - count should be 1 to setup size log */ rc = obd_llog_setup(obd, llogs, LLOG_SIZE_ORIG_CTXT, tgt, 0, &catid->lci_logid, &filter_size_orig_logops); RETURN(rc); } static int filter_llog_finish(struct obd_device *obd, struct obd_llogs *llogs, int count) { int rc; ENTRY; rc = obd_llog_cleanup(llog_get_context(llogs, LLOG_UNLINK_REPL_CTXT)); if (rc) RETURN(rc); rc = obd_llog_cleanup(llog_get_context(llogs, LLOG_SIZE_ORIG_CTXT)); RETURN(rc); } static int filter_llog_connect(struct obd_export *exp, struct llogd_conn_body *body) { struct obd_device *obd = exp->exp_obd; struct llog_ctxt *ctxt; struct obd_llogs *llog; int rc; ENTRY; CDEBUG(D_OTHER, "handle connect for %s: %u/%u/%u\n", obd->obd_name, (unsigned) body->lgdc_logid.lgl_ogr, (unsigned) body->lgdc_logid.lgl_oid, (unsigned) body->lgdc_logid.lgl_ogen); llog = filter_grab_llog_for_group(obd, body->lgdc_logid.lgl_ogr, exp); LASSERT(llog != NULL); ctxt = llog_get_context(llog, body->lgdc_ctxt_idx); rc = llog_connect(ctxt, 1, &body->lgdc_logid, &body->lgdc_gen, NULL); if (rc != 0) CERROR("failed to connect\n"); RETURN(rc); } static struct dentry *filter_lvfs_fid2dentry(__u64 id, __u32 gen, __u64 gr, void *data) { return filter_fid2dentry(data, NULL, gr, id); } static struct lvfs_callback_ops filter_lvfs_ops = { l_fid2dentry: filter_lvfs_fid2dentry, }; static struct obd_ops filter_obd_ops = { .o_owner = THIS_MODULE, .o_attach = filter_attach, .o_detach = filter_detach, .o_get_info = filter_get_info, .o_setup = filter_setup, .o_precleanup = filter_precleanup, .o_cleanup = filter_cleanup, .o_connect = filter_connect, .o_connect_post = filter_connect_post, .o_disconnect = filter_disconnect, .o_statfs = filter_statfs, .o_getattr = filter_getattr, .o_unpackmd = filter_unpackmd, .o_create = filter_create, .o_setattr = filter_setattr, .o_destroy = filter_destroy, .o_brw = filter_brw, .o_punch = filter_truncate, .o_sync = filter_sync, .o_preprw = filter_preprw, .o_commitrw = filter_commitrw, .o_do_cow = filter_do_cow, .o_write_extents = filter_write_extents, .o_destroy_export = filter_destroy_export, .o_llog_init = filter_llog_init, .o_llog_finish = filter_llog_finish, .o_llog_connect = filter_llog_connect, .o_iocontrol = filter_iocontrol, }; static struct obd_ops filter_sanobd_ops = { .o_owner = THIS_MODULE, .o_attach = filter_attach, .o_detach = filter_detach, .o_get_info = filter_get_info, .o_setup = filter_san_setup, .o_precleanup = filter_precleanup, .o_cleanup = filter_cleanup, .o_connect = filter_connect, .o_connect_post = filter_connect_post, .o_disconnect = filter_disconnect, .o_statfs = filter_statfs, .o_getattr = filter_getattr, .o_unpackmd = filter_unpackmd, .o_create = filter_create, .o_setattr = filter_setattr, .o_destroy = filter_destroy, .o_brw = filter_brw, .o_punch = filter_truncate, .o_sync = filter_sync, .o_preprw = filter_preprw, .o_commitrw = filter_commitrw, .o_do_cow = filter_do_cow, .o_write_extents = filter_write_extents, .o_san_preprw = filter_san_preprw, .o_destroy_export = filter_destroy_export, .o_llog_init = filter_llog_init, .o_llog_finish = filter_llog_finish, .o_llog_connect = filter_llog_connect, .o_iocontrol = filter_iocontrol, }; static int __init obdfilter_init(void) { struct lprocfs_static_vars lvars; int rc; printk(KERN_INFO "Lustre: Filtering OBD driver; info@clusterfs.com\n"); lprocfs_init_vars(filter, &lvars); rc = class_register_type(&filter_obd_ops, NULL, lvars.module_vars, OBD_FILTER_DEVICENAME); if (rc) return rc; rc = class_register_type(&filter_sanobd_ops, NULL, lvars.module_vars, OBD_FILTER_SAN_DEVICENAME); if (rc) class_unregister_type(OBD_FILTER_DEVICENAME); return rc; } static void __exit obdfilter_exit(void) { class_unregister_type(OBD_FILTER_SAN_DEVICENAME); class_unregister_type(OBD_FILTER_DEVICENAME); } MODULE_AUTHOR("Cluster File Systems, Inc. "); MODULE_DESCRIPTION("Lustre Filtering OBD driver"); MODULE_LICENSE("GPL"); module_init(obdfilter_init); module_exit(obdfilter_exit);