/* -*- 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 #include #include #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) # include # include # include #endif #include #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((char *)fed->fed_fcd->fcd_uuid, (char *)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((char *)fed->fed_fcd->fcd_uuid, (char *)obd->obd_uuid.uuid)) 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_CLIENTS/8); 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_CLIENTS/8); 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((char *)fsd->fsd_uuid, (char *)obd->obd_uuid.uuid)) { 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" fcd_group %d \n", fcd->fcd_uuid, cl_idx, last_rcvd, le64_to_cpu(fsd->fsd_last_transno), le32_to_cpu(fcd->fcd_group)); 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; fed->fed_group = le32_to_cpu(fcd->fcd_group); 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_connected = 0; exp->exp_req_replay_needed = 1; exp->exp_lock_replay_needed = 1; atomic_inc(&obd->obd_req_replay_clients); atomic_inc(&obd->obd_lock_replay_clients); 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: service %s, %d recoverable clients, " "last_transno "LPU64"\n", obd->obd_name, 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); if (rc) GOTO(err_client, rc); RETURN(0); 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); } /* turn on smfs plugins if any */ fsfilt_set_fs_flags(obd, tmp_subdirs->dentry[i]->d_inode, SM_ALL_PLG); 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); filter_free_capa_keys(filter); } 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; } static void filter_save_last_id(struct filter_obd *filter, int group, obd_id id) { LASSERT(group > 0); LASSERT(group < filter->fo_group_count); spin_lock(&filter->fo_lastidlock); if (id > filter_last_id(filter, group)) filter_set_last_id(filter, group, id); spin_unlock(&filter->fo_lastidlock); } /* 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 */ lock_res_and_lock(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) { unlock_res_and_lock(lock); RETURN(0); } lock->l_flags |= LDLM_FL_CBPENDING; do_ast = (!lock->l_readers && !lock->l_writers); unlock_res_and_lock(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]; int len; len = sprintf(name, LPU64, id); qstr_assign(&qstr, (char *)name, len); 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; LASSERTF(group < filter->fo_group_count, "group %d < filter->fo_group_count %d failed\n", (int)group, (int)filter->fo_group_count); LASSERTF(group > 0, "group %d > 0 failed\n", (int)group); 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); fsfilt_check_slow(now, obd_timeout, "parent lock"); 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_id2dentry(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)) { CERROR("%s: error getting object "LPU64":"LPU64 " parent: rc %ld\n", obd->obd_name, id, group, PTR_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("%s: child lookup error %ld\n", obd->obd_name, PTR_ERR(dchild)); RETURN(dchild); } if (dchild->d_inode != NULL && is_bad_inode(dchild->d_inode)) { CERROR("%s: got bad inode "LPU64"\n", obd->obd_name, id); f_dput(dchild); RETURN(ERR_PTR(-ENOENT)); } 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 ldlm_reply *rep; struct list_head *tmp; ldlm_error_t err; int tmpflags = 0, rc, repsize[2] = {sizeof(*rep), sizeof(*reply_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); rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*rep)); LASSERT(rep != NULL); 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; lock_res_and_lock(lock); res = lock->l_resource; rc = policy(lock, &tmpflags, 0, &err, &rpc_list); /* 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_lock *wlock = list_entry(rpc_list.next, struct ldlm_lock, l_cp_ast); LASSERT((lock->l_flags & LDLM_FL_AST_SENT) == 0); LASSERT(lock->l_flags & LDLM_FL_CP_REQD); lock->l_flags &= ~LDLM_FL_CP_REQD; list_del_init(&wlock->l_cp_ast); LDLM_LOCK_PUT(wlock); } if (rc == LDLM_ITER_CONTINUE) { /* The lock met with no resistance; we're finished. */ unlock_res_and_lock(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. */ res_lvb = res->lr_lvb_data; LASSERT(res_lvb != NULL); *reply_lvb = *res_lvb; 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); } unlock_res(res); /* There were no PW locks beyond the size in the LVB; finished. */ if (l == NULL) RETURN(ELDLM_LOCK_ABORTED); if (l->l_glimpse_ast == NULL) { /* We are racing with unlink(); just return -ENOENT */ CDEBUG(D_OTHER, "race with unlink: "LPX64"/"LPX64"\n", res->lr_name.name[0], res->lr_name.name[2]); rep->lock_policy_res1 = -ENOENT; goto out; } LASSERTF(l->l_glimpse_ast != NULL, "l == %p", l); 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); } lock_res(res); *reply_lvb = *res_lvb; unlock_res(res); out: 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_post_fs_setup(struct obd_device *obd) { struct filter_obd *filter = &obd->u.filter; int rc = 0; ENTRY; rc = fsfilt_post_setup(obd, filter->fo_dentry_O); 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 lvfs_obd_ctxt *lvfs_ctxt = NULL; struct vfsmount *mnt; char *str; char ns_name[48]; int rc = 0, i; ENTRY; if ((LUSTRE_CFG_BUFLEN(lcfg, 1)) < 1 || (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1)) RETURN(-EINVAL); obd->obd_fsops = fsfilt_get_ops(lustre_cfg_string(lcfg, 2)); if (IS_ERR(obd->obd_fsops)) RETURN(PTR_ERR(obd->obd_fsops)); rc = lvfs_mount_fs(lustre_cfg_string(lcfg, 1), lustre_cfg_string(lcfg, 2), option, MS_NOATIME | MS_NODIRATIME, &lvfs_ctxt); if (rc) { CERROR("lvfs_mount_fs failed: rc = %d\n", rc); GOTO(err_ops, rc); } LASSERT(lvfs_ctxt); mnt = lvfs_ctxt->loc_mnt; filter->fo_lvfs_ctxt = lvfs_ctxt; if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0 && lustre_cfg_buf(lcfg, 3)) { str = lustre_cfg_string(lcfg, 3); if (*str == 'f') { obd->obd_replayable = 1; obd_sync_filter = 1; CWARN("%s: recovery enabled\n", obd->obd_name); } else { if (*str != 'n') { CERROR("unrecognised flag '%c'\n", *str); } // 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; ll_clear_rdonly(ll_sbdev(filter->fo_sb)); 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; INIT_LIST_HEAD(&filter->fo_capa_keys); spin_lock_init(&filter->fo_capa_lock); 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); spin_lock_init(&filter->fo_lastidlock); 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); spin_lock_init(&filter->fo_denylist_lock); INIT_LIST_HEAD(&filter->fo_denylist); sprintf(ns_name, "filter-%s", obd->obd_uuid.uuid); obd->obd_namespace = ldlm_namespace_new(ns_name, 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, CATLIST); if (rc) { CERROR("failed to setup llogging subsystems\n"); GOTO(err_post, rc); } RETURN(0); err_post: filter_post(obd); err_mntput: unlock_kernel(); lvfs_umount_fs(filter->fo_lvfs_ctxt); 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; unsigned long page; int rc; ENTRY; /* 2.6.9 selinux wants a full option page for do_kern_mount (bug6471) */ page = get_zeroed_page(GFP_KERNEL); if (!page) RETURN(-ENOMEM); memcpy((void *)page, lustre_cfg_buf(lcfg, 4), LUSTRE_CFG_BUFLEN(lcfg, 4)); /* 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, (void *)page); free_page(page); 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; ll_sbdev_type save_dev; 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); } } target_cleanup_recovery(obd); ldlm_namespace_free(obd->obd_namespace, flags & OBD_OPT_FORCE); if (filter->fo_sb == NULL) RETURN(0); save_dev = ll_sbdev(filter->fo_sb); filter_post_fs_cleanup(obd); filter_post(obd); shrink_dcache_parent(filter->fo_sb->s_root); filter->fo_sb = 0; spin_lock(&filter->fo_denylist_lock); while (!list_empty(&filter->fo_denylist)) { deny_sec_t *p_deny_sec = list_entry(filter->fo_denylist.next, deny_sec_t, list); list_del(&p_deny_sec->list); OBD_FREE(p_deny_sec, sizeof(*p_deny_sec)); } spin_unlock(&filter->fo_denylist_lock); unlock_kernel(); lvfs_umount_fs(filter->fo_lvfs_ctxt); //destroy_buffers(filter->fo_sb->s_dev); filter->fo_sb = NULL; fsfilt_put_ops(obd->obd_fsops); lock_kernel(); ll_clear_rdonly(save_dev); RETURN(0); } static int filter_process_config(struct obd_device *obd, obd_count len, void *buf) { struct lustre_cfg *lcfg = buf; struct filter_obd *filter = &obd->u.filter; int rc = 0; ENTRY; switch(lcfg->lcfg_command) { case LCFG_SET_SECURITY: { if ((LUSTRE_CFG_BUFLEN(lcfg, 1) == 0) || (LUSTRE_CFG_BUFLEN(lcfg, 2) == 0)) GOTO(out, rc = -EINVAL); if (!strcmp(lustre_cfg_string(lcfg, 1), "deny_sec")){ spin_lock(&filter->fo_denylist_lock); rc = add_deny_security(lustre_cfg_string(lcfg, 2), &filter->fo_denylist); spin_unlock(&filter->fo_denylist_lock); }else { CERROR("Unrecognized key\n"); rc = -EINVAL; } break; } default: { CERROR("Unknown command: %d\n", lcfg->lcfg_command); GOTO(out, rc = -EINVAL); } } out: RETURN(rc); } static int filter_connect_post(struct obd_export *exp, unsigned initial, unsigned long connect_flags) { 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 = 0; 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, struct obd_connect_data *data, 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); /* connection from MDS */ group = connect_flags; 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; fed->fed_fcd->fcd_group = group; rc = filter_client_add(obd, filter, fed, -1); if (rc) GOTO(cleanup, rc); } CWARN("%s: Received MDS connection ("LPX64"); group %d\n", obd->obd_name, exp->exp_handle.h_cookie, group); if (group == 0) GOTO(cleanup, rc); 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); } 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; int level = D_CACHE; 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; if (fed->fed_grant < 0 || fed->fed_pending < 0 || fed->fed_dirty < 0) level = D_ERROR; if (maxsize > 0) { /* we may not have done a statfs yet */ LASSERTF(fed->fed_grant + fed->fed_pending <= maxsize, "cli %s/%p %ld+%ld > "LPU64"\n", exp->exp_client_uuid.uuid, exp, fed->fed_grant, fed->fed_pending, maxsize); LASSERTF(fed->fed_dirty <= maxsize, "cli %s/%p %ld > "LPU64"\n", exp->exp_client_uuid.uuid, exp, fed->fed_dirty, maxsize); } CDEBUG(level, "%s: cli %s/%p dirty %ld pend %ld grant %ld\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; int level = D_CACHE; 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); if (fed->fed_dirty < 0 || fed->fed_grant < 0 || fed->fed_pending < 0) level = D_ERROR; CDEBUG(level, "%s: cli %s/%p dirty %ld pend %ld grant %ld\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 %ld\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(filter->fo_tot_pending >= fed->fed_pending, "%s: tot_pending "LPU64" cli %s/%p fed_pending %ld\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 %ld\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, unsigned long 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; ENTRY; if (oa->o_valid & OBD_MD_FLGROUP) group = oa->o_gr; dchild = filter_id2dentry(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) { CDEBUG(D_INFO, "%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); } int filter_setattr_internal(struct obd_export *exp, struct dentry *dentry, struct obdo *oa, struct obd_trans_info *oti) { struct filter_obd *filter; struct iattr iattr; void *handle; int rc, err; ENTRY; LASSERT(dentry != NULL); LASSERT(!IS_ERR(dentry)); LASSERT(dentry->d_inode != NULL); filter = &exp->exp_obd->u.filter; iattr_from_obdo(&iattr, oa, oa->o_valid); 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); err = fsfilt_commit(exp->exp_obd, filter->fo_sb, dentry->d_inode, handle, exp->exp_sync); if (err) { CERROR("error on commit, err = %d\n", err); if (!rc) rc = err; } EXIT; out_unlock: if (iattr.ia_valid & ATTR_SIZE) up(&dentry->d_inode->i_sem); return rc; } /* this is called from filter_truncate() until we have filter_punch() */ int filter_setattr(struct obd_export *exp, struct obdo *oa, struct lov_stripe_md *md, struct obd_trans_info *oti, struct lustre_capa *capa) { struct ldlm_res_id res_id = { .name = { oa->o_id, 0, oa->o_gr, 0 } }; struct ldlm_valblock_ops *ns_lvbo; struct lvfs_run_ctxt saved; struct filter_obd *filter; struct ldlm_resource *res; struct dentry *dentry; /*obd_uid uid;*/ /*obd_gid gid;*/ int rc; ENTRY; LASSERT(oti != NULL); filter = &exp->exp_obd->u.filter; push_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL); /* pass nid through */ current->user->nid = oti->oti_nid; /* make sure that object is allocated. */ dentry = filter_crow_object(exp->exp_obd, oa); if (IS_ERR(dentry)) GOTO(out_pop, rc = PTR_ERR(dentry)); rc = filter_verify_fid(exp, dentry->d_inode, capa); if (rc) GOTO(out_pop, rc); lock_kernel(); /* setting objects attributes (including owner/group) */ rc = filter_setattr_internal(exp, dentry, oa, oti); if (rc) GOTO(out_unlock, rc); res = ldlm_resource_get(exp->exp_obd->obd_namespace, NULL, res_id, LDLM_EXTENT, 0); if (res != NULL) { ns_lvbo = res->lr_namespace->ns_lvbo; if (ns_lvbo && ns_lvbo->lvbo_update) rc = 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); EXIT; out_unlock: unlock_kernel(); f_dput(dentry); out_pop: pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL); 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 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); } int filter_create_object(struct obd_device *obd, struct obdo *oa) { struct dentry *dparent = NULL; struct dentry *dchild = NULL; struct lvfs_ucred uc = {0,}; struct lvfs_run_ctxt saved; struct filter_obd *filter; int cleanup_phase = 0; int err = 0, rc = 0; void *handle = NULL; void *lock = NULL; obd_uid uid; obd_gid gid; ENTRY; filter = &obd->u.filter; down(&filter->fo_create_locks[oa->o_gr]); if (test_bit(oa->o_gr, &filter->fo_destroys_in_progress)) { CWARN("%s: create aborted by destroy\n", obd->obd_name); GOTO(out, rc = -EALREADY); } CDEBUG(D_INFO, "create objid "LPU64"\n", oa->o_id); 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_id2dentry(obd, dparent, oa->o_gr, oa->o_id); if (IS_ERR(dchild)) GOTO(cleanup, rc = PTR_ERR(dchild)); cleanup_phase = 2; if (dchild->d_inode != NULL) GOTO(cleanup, rc = 0); 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; uid = oa->o_valid & OBD_MD_FLUID ? oa->o_uid : 0; gid = oa->o_valid & OBD_MD_FLGID ? oa->o_gid : 0; uc.luc_uid = uid; uc.luc_gid = gid; uc.luc_fsuid = uid; uc.luc_fsgid = gid; uc.luc_cap = current->cap_effective; cap_raise(uc.luc_cap, CAP_SYS_RESOURCE); push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc); rc = ll_vfs_create(dparent->d_inode, dchild, S_IFREG, NULL); pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc); if (rc) { CERROR("create failed rc = %d\n", rc); GOTO(cleanup, rc); } /* nobody else is touching this newly created object */ LASSERT(dchild->d_inode); if (oa->o_valid & OBD_MD_FLIFID) { rc = fsfilt_set_md(obd, dchild->d_inode, handle, obdo_id(oa), sizeof(struct lustre_id), EA_SID); if (rc) { CERROR("store fid in object failed! rc:%d\n", rc); GOTO(cleanup, rc); } } else { CWARN("create object without lustre id!\n"); portals_debug_dumpstack(NULL); } fsfilt_set_fs_flags(obd, dparent->d_inode, SM_DO_REC); /* save last created object id */ filter_save_last_id(filter, oa->o_gr, oa->o_id); rc = filter_update_last_objid(obd, oa->o_gr, 0); if (rc) { CERROR("unable to write lastobjid, but " "orphans were deleted, err = %d\n", rc); rc = 0; } 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) GOTO(out, rc); out: up(&filter->fo_create_locks[oa->o_gr]); RETURN(rc); } struct dentry * filter_crow_object(struct obd_device *obd, struct obdo *oa) { struct dentry *dentry; /* obd_uid uid; */ /* obd_gid gid; */ int rc = 0; ENTRY; /* check if object is already allocated */ dentry = filter_id2dentry(obd, NULL, oa->o_gr, oa->o_id); if (IS_ERR(dentry)) RETURN(dentry); if (dentry->d_inode) RETURN(dentry); f_dput(dentry); CDEBUG(D_INODE, "OSS object "LPU64"/"LPU64 " does not exists - allocate it now\n", oa->o_id, oa->o_gr); /* uid = oa->o_valid & OBD_MD_FLUID ? oa->o_uid : 0; gid = oa->o_valid & OBD_MD_FLGID ? oa->o_gid : 0; */ rc = filter_create_object(obd, oa); if (rc) { CERROR("cannot create OSS object "LPU64"/"LPU64 ", err = %d\n", oa->o_id, oa->o_gr, rc); RETURN(ERR_PTR(rc)); } /* lookup for just created object and return it to caller */ dentry = filter_id2dentry(obd, NULL, oa->o_gr, oa->o_id); if (IS_ERR(dentry)) RETURN(dentry); if (dentry->d_inode == NULL) { f_dput(dentry); dentry = ERR_PTR(-ENOENT); CERROR("cannot find just created OSS object " LPU64"/"LPU64" err = %d\n", oa->o_id, oa->o_gr, (int)PTR_ERR(dentry)); RETURN(dentry); } RETURN(dentry); } static int filter_clear_orphans(struct obd_export *exp, struct obdo *oa) { struct obd_device *obd = NULL; struct filter_obd *filter; struct obdo *doa = NULL; int rc = 0, orphans; __u64 last, id; ENTRY; LASSERT(oa); LASSERT(oa->o_gr != 0); LASSERT(oa->o_valid & OBD_MD_FLGROUP); obd = exp->exp_obd; filter = &obd->u.filter; last = filter_last_id(filter, oa->o_gr); orphans = last - oa->o_id; if (orphans <= 0) RETURN(0); doa = obdo_alloc(); if (doa == NULL) RETURN(-ENOMEM); doa->o_gr = oa->o_gr; doa->o_mode = S_IFREG; 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]); GOTO(out_free_doa, 0); } CDEBUG(D_ERROR, "%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_ERROR, "%s:["LPU64"] after destroy: set last_objids = " LPU64"\n", exp->exp_obd->obd_name, doa->o_gr, last + 1); /* return next free id to be used as a new start of sequence -bzzz */ oa->o_id = last + 1; filter_set_last_id(filter, oa->o_gr, oa->o_id); clear_bit(doa->o_gr, &filter->fo_destroys_in_progress); up(&filter->fo_create_locks[oa->o_gr]); EXIT; out_free_doa: obdo_free(doa); return rc; } /* * by now this function is only needed as entry point for deleting orphanes on * OSS as objects are created on first write attempt. --umka */ static int filter_create(struct obd_export *exp, struct obdo *oa, void *acl, int acl_size, struct lov_stripe_md **ea, struct obd_trans_info *oti) { struct filter_export_data *fed; struct obd_device *obd = NULL; int group = oa->o_gr, rc = 0; struct lvfs_run_ctxt saved; struct filter_obd *filter; char str[PTL_NALFMT_SIZE]; ENTRY; LASSERT(acl == NULL && acl_size == 0); 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); } obd = exp->exp_obd; fed = &exp->exp_filter_data; filter = &obd->u.filter; if (fed->fed_group != group) { 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 (oa->o_gr == FILTER_GROUP_ECHO) { rc = filter_create_object(obd, oa); if (rc == 0 && ea != NULL) { struct lov_stripe_md *lsm = *ea; if (lsm == NULL) { rc = obd_alloc_memmd(exp, &lsm); LASSERT(rc >= 0); } lsm->lsm_object_id = oa->o_id; *ea = lsm; rc = 0; } RETURN(rc); } obd = exp->exp_obd; push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); LASSERT((oa->o_valid & OBD_MD_FLFLAGS) && (oa->o_flags == OBD_FL_DELORPHAN)); rc = filter_clear_orphans(exp, oa); if (rc) { CERROR("cannot clear orphanes starting from " LPU64", err = %d\n", oa->o_id, rc); } else { rc = filter_update_last_objid(obd, group, 0); if (rc) { CERROR("unable to write lastobjid, but " "orphans were deleted, err = %d\n", rc); } } pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); RETURN(0); } static int filter_destroy(struct obd_export *exp, struct obdo *oa, struct lov_stripe_md *ea, struct obd_trans_info *oti) { int rc, rc2, cleanup_phase = 0, have_prepared = 0; struct dentry *dchild = NULL, *dparent = NULL; struct llog_cookie *fcc = NULL; struct lvfs_run_ctxt saved; struct filter_obd *filter; struct obd_device *obd; void *handle = NULL; void *lock = NULL; struct iattr iattr; 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_id2dentry(obd, dparent, oa->o_gr, oa->o_id); if (IS_ERR(dchild)) GOTO(cleanup, rc = PTR_ERR(dchild)); cleanup_phase = 2; if (dchild->d_inode == NULL) { CDEBUG(D_INODE, "destroying non-existent object "LPU64"\n", oa->o_id); if (have_prepared) 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; } /* 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)); } /* we're gonna truncate it first in order to avoid possible * deadlock: * P1 P2 * open trasaction open transaction * down(i_zombie) down(i_zombie) * restart transaction * (see BUG 4180) -bzzz */ down(&dchild->d_inode->i_sem); handle = fsfilt_start_log(obd, dparent->d_inode,FSFILT_OP_SETATTR,NULL,1); if (IS_ERR(handle)) { up(&dchild->d_inode->i_sem); GOTO(cleanup, rc = PTR_ERR(handle)); } iattr.ia_valid = ATTR_SIZE; iattr.ia_size = 0; rc = fsfilt_setattr(obd, dchild, handle, &iattr, 1); rc2 = fsfilt_commit(obd, filter->fo_sb, dparent->d_inode, handle, 0); up(&dchild->d_inode->i_sem); if (rc) GOTO(cleanup, rc); if (rc2) GOTO(cleanup, rc = rc2); 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; rc = filter_destroy_internal(obd, oa->o_id, dparent, dchild); cleanup: switch(cleanup_phase) { case 3: if (fcc != NULL) { fsfilt_add_journal_cb(obd, filter->fo_sb, 0, oti ? oti->oti_handle : handle, filter_cancel_cookies_cb, fcc); } rc = filter_finish_transno(exp, oti, rc); rc2 = fsfilt_commit(obd, filter->fo_sb, dparent->d_inode, handle, exp->exp_sync); 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, struct lustre_capa *capa) { int error; int rc; ENTRY; if (end != OBD_OBJECT_EOF) CERROR("PUNCH not supported, only truncate: end = "LPX64"\n", end); rc = filter_verify_capa(OBD_BRW_WRITE, exp, capa); if (rc) RETURN(rc); CDEBUG(D_INODE, "calling truncate for object "LPU64", valid = "LPU64", " "o_size = "LPD64"\n", oa->o_id, oa->o_valid, start); oa->o_size = start; error = filter_setattr(exp, oa, NULL, oti, capa); 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_fdatawrite(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_set_info(struct obd_export *exp, __u32 keylen, void *key, __u32 vallen, void *val) { struct obd_device *obd; int rc = -EINVAL; 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 == 8 && memcmp(key, "auditlog", 8) == 0) { rc = fsfilt_set_info(obd, obd->u.filter.fo_sb, NULL, 8, "auditlog", vallen, val); RETURN(rc); } else if (keylen == 5 && strcmp(key, "audit") == 0) { /* set audit for whole FS on OSS */ struct audit_attr_msg * msg = val; rc = fsfilt_set_info(obd, obd->u.filter.fo_sb, NULL, 5, "audit", sizeof(msg->attr), &msg->attr); RETURN(rc); } else if (keylen == 9 && strcmp(key, "audit_obj") == 0) { struct obdo * oa = val; struct dentry * dentry; __u64 mask = oa->o_fid; dentry = filter_crow_object(obd, oa); if (IS_ERR(dentry)) RETURN(PTR_ERR(dentry)); rc = fsfilt_set_info(obd, obd->u.filter.fo_sb, dentry->d_inode, 5, "audit", sizeof(mask), &mask); f_dput(dentry); RETURN(rc); } else if (keylen == 8 && memcmp(key, "capa_key", 8) == 0) { struct lustre_capa_key *lkey = val; rc = filter_update_capa_key(obd, lkey); RETURN(rc); } if (rc) CDEBUG(D_IOCTL, "invalid key '%s'\n", (char *)key); 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)llog_get_context(&obd->obd_llogs, LLOG_REINT_ORIG_CTXT); RETURN(0); } if (keylen >= strlen("cache_sb") && memcmp(key, "cache_sb", 8) == 0) { 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); ll_set_rdonly(ll_sbdev(obd->u.filter.fo_sb)); 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; filter_size_orig_logops = llog_lvfs_ops; #if 0 filter_size_orig_logops.lop_setup = llog_obd_origin_setup; filter_size_orig_logops.lop_cleanup = llog_catalog_cleanup; filter_size_orig_logops.lop_add = llog_catalog_add; #endif rc = obd_llog_setup(obd, llogs, LLOG_SIZE_ORIG_CTXT, tgt, 1, &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_id2dentry(__u64 id, __u32 gen, __u64 gr, void *data) { return filter_id2dentry(data, NULL, gr, id); } static struct lvfs_callback_ops filter_lvfs_ops = { l_id2dentry: filter_lvfs_id2dentry, }; static struct obd_ops filter_obd_ops = { .o_owner = THIS_MODULE, .o_attach = filter_attach, .o_detach = filter_detach, .o_set_info = filter_set_info, .o_get_info = filter_get_info, .o_setup = filter_setup, .o_precleanup = filter_precleanup, .o_cleanup = filter_cleanup, .o_process_config = filter_process_config, .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 size, rc; printk(KERN_INFO "Lustre: Filtering OBD driver; info@clusterfs.com\n"); lprocfs_init_vars(filter, &lvars); size = OBDFILTER_CREATED_SCRATCHPAD_ENTRIES * sizeof(*obdfilter_created_scratchpad); OBD_ALLOC(obdfilter_created_scratchpad, size); if (obdfilter_created_scratchpad == NULL) { CERROR ("Can't allocate scratchpad\n"); return -ENOMEM; } rc = class_register_type(&filter_obd_ops, NULL, lvars.module_vars, OBD_FILTER_DEVICENAME); if (rc) { OBD_FREE(obdfilter_created_scratchpad, size); 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); OBD_FREE(obdfilter_created_scratchpad, size); } return rc; } static void __exit obdfilter_exit(void) { class_unregister_type(OBD_FILTER_SAN_DEVICENAME); class_unregister_type(OBD_FILTER_DEVICENAME); OBD_FREE(obdfilter_created_scratchpad, OBDFILTER_CREATED_SCRATCHPAD_ENTRIES * sizeof(*obdfilter_created_scratchpad)); } MODULE_AUTHOR("Cluster File Systems, Inc. "); MODULE_DESCRIPTION("Lustre Filtering OBD driver"); MODULE_LICENSE("GPL"); module_init(obdfilter_init); module_exit(obdfilter_exit);