+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
- * lustre/mgs/mgs_handler.c
- * Lustre Management Server (mgs) request handler
- *
- * Copyright (C) 2001-2005 Cluster File Systems, Inc.
- * Author Nathan <nathan@clusterfs.com>
- * Author LinSongTao <lincent@clusterfs.com>
- *
- * 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.
- */
-
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
-#define DEBUG_SUBSYSTEM S_MGS
-
-#ifdef __KERNEL__
-# include <linux/module.h>
-# include <linux/pagemap.h>
-# include <linux/miscdevice.h>
-# include <linux/init.h>
-#else
-# include <liblustre.h>
-#endif
-
-#include <linux/obd_class.h>
-#include <linux/lustre_dlm.h>
-#include <linux/lprocfs_status.h>
-#include "mgs_internal.h"
-
-/* Establish a connection to the MGS.*/
-static int mgs_connect(struct lustre_handle *conn, struct obd_device *obd,
- struct obd_uuid *cluuid, struct obd_connect_data *data)
-{
- struct obd_export *exp;
- struct mgs_export_data *med;
- struct mgs_client_data *mcd;
- int rc, abort_recovery;
- ENTRY;
-
- if (!conn || !obd || !cluuid)
- RETURN(-EINVAL);
-
- /* Check for aborted recovery. */
- spin_lock_bh(&obd->obd_processing_task_lock);
- abort_recovery = obd->obd_abort_recovery;
- spin_unlock_bh(&obd->obd_processing_task_lock);
- if (abort_recovery)
- target_abort_recovery(obd);
-
- rc = class_connect(conn, obd, cluuid);
- if (rc)
- RETURN(rc);
- exp = class_conn2export(conn);
- LASSERT(exp);
- med = &exp->exp_mgs_data;
-
- if (data != NULL) {
- data->ocd_connect_flags &= MGS_CONNECT_SUPPORTED;
- exp->exp_connect_flags = data->ocd_connect_flags;
- }
-
- OBD_ALLOC(mcd, sizeof(*mcd));
- if (!mcd) {
- CERROR("mgs: out of memory for client data\n");
- GOTO(out, rc = -ENOMEM);
- }
-
- memcpy(mcd->mcd_uuid, cluuid, sizeof(mcd->mcd_uuid));
- med->med_mcd = mcd;
-
-out:
- if (rc) {
- if (mcd) {
- OBD_FREE(mcd, sizeof(*mcd));
- med->med_mcd = NULL;
- }
- class_disconnect(exp);
- } else {
- class_export_put(exp);
- }
-
- RETURN(rc);
-}
-
-static int mgs_init_export(struct obd_export *exp)
-{
- struct mgs_export_data *med = &exp->exp_mgs_data;
-
- INIT_LIST_HEAD(&med->med_open_head);
- spin_lock_init(&med->med_open_lock);
- RETURN(0);
-}
-
-static int mgs_disconnect(struct obd_export *exp)
-{
- unsigned long irqflags;
- int rc;
- ENTRY;
-
- LASSERT(exp);
- class_export_get(exp);
-
- /* Disconnect early so that clients can't keep using export */
- rc = class_disconnect(exp);
-
- /* complete all outstanding replies */
- spin_lock_irqsave(&exp->exp_lock, irqflags);
- while (!list_empty(&exp->exp_outstanding_replies)) {
- struct ptlrpc_reply_state *rs =
- list_entry(exp->exp_outstanding_replies.next,
- struct ptlrpc_reply_state, rs_exp_list);
- struct ptlrpc_service *svc = rs->rs_service;
-
- spin_lock(&svc->srv_lock);
- list_del_init(&rs->rs_exp_list);
- ptlrpc_schedule_difficult_reply(rs);
- spin_unlock(&svc->srv_lock);
- }
- spin_unlock_irqrestore(&exp->exp_lock, irqflags);
-
- class_export_put(exp);
- RETURN(rc);
-}
-
-/* mount the file system (secretly) */
-static int mgs_setup(struct obd_device *obd, obd_count len, void *buf)
-{
- struct lprocfs_static_vars lvars;
- struct lustre_cfg* lcfg = buf;
- char *options = NULL;
- struct mgs_obd *mgs = &obd->u.mgs;
- struct vfsmount *mnt;
- unsigned long page;
- int rc = 0;
- ENTRY;
-
- /* setup 1:/dev/loop/0 2:ext3 3:mgs 4:errors=remount-ro,iopen_nopriv*/
-
- if (lcfg->lcfg_bufcount < 3)
- RETURN(rc = -EINVAL)
-
- if (LUSTRE_CFG_BUFLEN(lcfg, 1) == 0 || LUSTRE_CFG_BUFLEN(lcfg, 2) == 0)
- RETURN(rc = -EINVAL);
-
- obd->obd_fsops = fsfilt_get_ops(lustre_cfg_string(lcfg, 2));
- if (IS_ERR(obd->obd_fsops))
- RETURN(rc = PTR_ERR(obd->obd_fsops));
-
- page = __get_free_page(GFP_KERNEL);
- if (!page)
- RETURN(-ENOMEM);
-
- options = (char *)page;
- memset(options, 0, PAGE_SIZE);
-
- if (LUSTRE_CFG_BUFLEN(lcfg, 4) > 0 && lustre_cfg_buf(lcfg, 4))
- sprintf(options , ",%s", lustre_cfg_string(lcfg, 4));
-
- //FIXME mount was already done in lustre_fill_super,
- //we just need to access it
- mnt = do_kern_mount(lustre_cfg_string(lcfg, 2), 0,
- lustre_cfg_string(lcfg, 1), (void *)options);
- free_page(page);
- if (IS_ERR(mnt)) {
- rc = PTR_ERR(mnt);
- CERROR("do_kern_mount failed: rc = %d\n", rc);
- GOTO(err_ops, rc);
- }
-
- CDEBUG(D_SUPER, "%s: mnt = %p\n", lustre_cfg_string(lcfg, 1), mnt);
-
- LASSERT(!lvfs_check_rdonly(lvfs_sbdev(mnt->mnt_sb)));
-
- rc = mgs_fs_setup(obd, mnt);
- if (rc) {
- CERROR("%s: MGS filesystem method init failed: rc = %d\n",
- obd->obd_name, rc);
- GOTO(err_ns, rc);
- }
-
- rc = llog_start_commit_thread();
- if (rc < 0)
- GOTO(err_fs, rc);
-#if 0
- //FIXME: no LDLM support for llog now
- ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
- "mgs_ldlm_client", &obd->obd_ldlm_client);
-#endif
- obd->obd_replayable = 1;
-
- rc = mgs_postsetup(obd);
- if (rc)
- GOTO(err_fs, rc);
-
- lprocfs_init_vars(mgs, &lvars);
- lprocfs_obd_setup(obd, lvars.obd_vars);
-
- if (obd->obd_recovering) {
- LCONSOLE_WARN("MGT %s now serving %s, but will be in recovery "
- "until %d %s reconnect, or if no clients "
- "reconnect for %d:%.02d; during that time new "
- "clients will not be allowed to connect. "
- "Recovery progress can be monitored by watching "
- "/proc/fs/lustre/mgs/%s/recovery_status.\n",
- obd->obd_name,
- lustre_cfg_string(lcfg, 1),
- obd->obd_recoverable_clients,
- (obd->obd_recoverable_clients == 1)
- ? "client" : "clients",
- (int)(OBD_RECOVERY_TIMEOUT / HZ) / 60,
- (int)(OBD_RECOVERY_TIMEOUT / HZ) % 60,
- obd->obd_name);
- } else {
- LCONSOLE_INFO("MGT %s now serving %s with recovery %s.\n",
- obd->obd_name,
- lustre_cfg_string(lcfg, 1),
- obd->obd_replayable ? "enabled" : "disabled");
- }
-//FIXME: no ldlm support now
- ldlm_timeout = 6;
- ping_evictor_start();
-
- RETURN(0);
-
-err_fs:
- /* No extra cleanup needed for llog_init_commit_thread() */
- mgs_fs_cleanup(obd);
-err_put:
- unlock_kernel();
- mntput(mgs->mgs_vfsmnt);
- mgs->mgs_sb = 0;
- lock_kernel();
-err_ops:
- fsfilt_put_ops(obd->obd_fsops);
- return rc;
-}
-
-
-static int mgs_postsetup(struct obd_device *obd)
-{
- struct mgs_obd *mgs = &obd->u.mgs;
- int rc = 0;
- ENTRY;
-
- rc = llog_setup(obd, LLOG_CONFIG_ORIG_CTXT, obd, 0, NULL,
- &llog_lvfs_ops);
- RETURN(rc);
-}
-
-static int mgs_precleanup(struct obd_device *obd, int stage)
-{
- int rc = 0;
- ENTRY;
-
- llog_cleanup(llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT));
- rc = obd_llog_finish(obd, 0);
- RETURN(rc);
-}
-
-static int mgs_cleanup(struct obd_device *obd)
-{
- struct mgs_obd *mgs = &obd->u.mgs;
- lvfs_sbdev_type save_dev;
- int must_relock = 0;
- ENTRY;
-
- ping_evictor_stop();
-
- if (mgs->mgs_sb == NULL)
- RETURN(0);
- save_dev = lvfs_sbdev(mgs->mgs_sb);
-
- lprocfs_obd_cleanup(obd);
-
- mgs_update_server_data(obd, 1);
-
- mgs_fs_cleanup(obd);
-
- if (atomic_read(&obd->u.mgs.mgs_vfsmnt->mnt_count) > 2)
- CERROR("%s: mount busy, mnt_count %d != 2\n", obd->obd_name,
- atomic_read(&obd->u.mgs.mgs_vfsmnt->mnt_count));
-
- /* We can only unlock kernel if we are in the context of sys_ioctl,
- otherwise we never called lock_kernel */
- if (kernel_locked()) {
- unlock_kernel();
- must_relock++;
- }
-
- mntput(mgs->mgs_vfsmnt);
- mgs->mgs_sb = NULL;
-
- spin_lock_bh(&obd->obd_processing_task_lock);
- if (obd->obd_recovering) {
- target_cancel_recovery_timer(obd);
- obd->obd_recovering = 0;
- }
- spin_unlock_bh(&obd->obd_processing_task_lock);
-
- lvfs_clear_rdonly(save_dev);
-
- if (must_relock)
- lock_kernel();
-
- fsfilt_put_ops(obd->obd_fsops);
-
- LCONSOLE_INFO("MDT %s has stopped.\n", obd->obd_name);
-
- RETURN(0);
-}
-
-/* Look up an entry by inode number. */
-/* this function ONLY returns valid dget'd dentries with an initialized inode
- or errors */
-struct dentry *mgs_fid2dentry(struct mgs_obd *mgs, struct ll_fid *fid,
- struct vfsmount **mnt)
-{
- char fid_name[32];
- unsigned long ino = fid->id;
- __u32 generation = fid->generation;
- struct inode *inode;
- struct dentry *result;
-
- if (ino == 0)
- RETURN(ERR_PTR(-ESTALE));
-
- snprintf(fid_name, sizeof(fid_name), "0x%lx", ino);
-
- CDEBUG(D_DENTRY, "--> mgs_fid2dentry: ino/gen %lu/%u, sb %p\n",
- ino, generation, mgs->mgs_sb);
-
- /* under ext3 this is neither supposed to return bad inodes
- nor NULL inodes. */
- result = ll_lookup_one_len(fid_name, mgs->mgs_fid_de, strlen(fid_name));
- if (IS_ERR(result))
- RETURN(result);
-
- inode = result->d_inode;
- if (!inode)
- RETURN(ERR_PTR(-ENOENT));
-
- if (generation && inode->i_generation != generation) {
- /* we didn't find the right inode.. */
- CERROR("bad inode %lu, link: %lu ct: %d or generation %u/%u\n",
- inode->i_ino, (unsigned long)inode->i_nlink,
- atomic_read(&inode->i_count), inode->i_generation,
- generation);
- dput(result);
- RETURN(ERR_PTR(-ENOENT));
- }
-
- if (mnt) {
- *mnt = mgs->mgs_vfsmnt;
- mntget(*mnt);
- }
-
- RETURN(result);
-}
-
-static struct dentry *mgs_lvfs_fid2dentry(__u64 id, __u32 gen, __u64 gr,
- void *data)
-{
- struct obd_device *obd = data;
- struct ll_fid fid;
- fid.id = id;
- fid.generation = gen;
- return mgs_fid2dentry(&obd->u.mgs, &fid, NULL);
-}
-
-struct lvfs_callback_ops mgs_lvfs_ops = {
- l_fid2dentry: mgs_lvfs_fid2dentry,
-};
-
-
-int mgs_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
- void *karg, void *uarg)
-{
- static struct obd_uuid cfg_uuid = { .uuid = "config_uuid" };
- struct obd_device *obd = exp->exp_obd;
- struct mgs_obd *mgs = &obd->u.mgs;
- struct obd_ioctl_data *data = karg;
- struct lvfs_run_ctxt saved;
- int rc = 0;
-
- ENTRY;
- CDEBUG(D_IOCTL, "handling ioctl cmd %#x\n", cmd);
-
- switch (cmd) {
- case OBD_IOC_RECORD: {
- char *name = data->ioc_inlbuf1;
- if (mgs->mgs_cfg_llh)
- RETURN(-EBUSY);
-
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- rc = llog_create(llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT),
- &mds->mds_cfg_llh, NULL, name);
- if (rc == 0)
- llog_init_handle(mds->mds_cfg_llh, LLOG_F_IS_PLAIN,
- &cfg_uuid);
- else
- mds->mds_cfg_llh = NULL;
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
-
- RETURN(rc);
- }
-
- case OBD_IOC_ENDRECORD: {
- if (!mds->mds_cfg_llh)
- RETURN(-EBADF);
-
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- rc = llog_close(mds->mds_cfg_llh);
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
-
- mds->mds_cfg_llh = NULL;
- RETURN(rc);
- }
-
- case OBD_IOC_CLEAR_LOG: {
- char *name = data->ioc_inlbuf1;
- if (mds->mds_cfg_llh)
- RETURN(-EBUSY);
-
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- rc = llog_create(llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT),
- &mds->mds_cfg_llh, NULL, name);
- if (rc == 0) {
- llog_init_handle(mds->mds_cfg_llh, LLOG_F_IS_PLAIN,
- NULL);
-
- rc = llog_destroy(mds->mds_cfg_llh);
- llog_free_handle(mds->mds_cfg_llh);
- }
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
-
- mds->mds_cfg_llh = NULL;
- RETURN(rc);
- }
-
- case OBD_IOC_DORECORD: {
- char *cfg_buf;
- struct llog_rec_hdr rec;
- if (!mds->mds_cfg_llh)
- RETURN(-EBADF);
-
- rec.lrh_len = llog_data_len(data->ioc_plen1);
-
- if (data->ioc_type == LUSTRE_CFG_TYPE) {
- rec.lrh_type = OBD_CFG_REC;
- } else {
- CERROR("unknown cfg record type:%d \n", data->ioc_type);
- RETURN(-EINVAL);
- }
-
- OBD_ALLOC(cfg_buf, data->ioc_plen1);
- if (cfg_buf == NULL)
- RETURN(-EINVAL);
- rc = copy_from_user(cfg_buf, data->ioc_pbuf1, data->ioc_plen1);
- if (rc) {
- OBD_FREE(cfg_buf, data->ioc_plen1);
- RETURN(rc);
- }
-
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- rc = llog_write_rec(mds->mds_cfg_llh, &rec, NULL, 0,
- cfg_buf, -1);
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
-
- OBD_FREE(cfg_buf, data->ioc_plen1);
- RETURN(rc);
- }
-
- case OBD_IOC_PARSE: {
- struct llog_ctxt *ctxt =
- llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- rc = class_config_parse_llog(ctxt, data->ioc_inlbuf1, NULL);
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- if (rc)
- RETURN(rc);
-
- RETURN(rc);
- }
-
- case OBD_IOC_DUMP_LOG: {
- struct llog_ctxt *ctxt =
- llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- rc = class_config_dump_llog(ctxt, data->ioc_inlbuf1, NULL);
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- if (rc)
- RETURN(rc);
-
- RETURN(rc);
- }
-
- case OBD_IOC_SYNC: {
- CDEBUG(D_HA, "syncing mds %s\n", obd->obd_name);
- rc = fsfilt_sync(obd, obd->u.mds.mds_sb);
- RETURN(rc);
- }
-
- case OBD_IOC_SET_READONLY: {
- void *handle;
- struct inode *inode = obd->u.mds.mds_sb->s_root->d_inode;
- BDEVNAME_DECLARE_STORAGE(tmp);
- CERROR("*** setting device %s read-only ***\n",
- ll_bdevname(obd->u.mds.mds_sb, tmp));
-
- handle = fsfilt_start(obd, inode, FSFILT_OP_MKNOD, NULL);
- if (!IS_ERR(handle))
- rc = fsfilt_commit(obd, inode, handle, 1);
-
- CDEBUG(D_HA, "syncing mds %s\n", obd->obd_name);
- rc = fsfilt_sync(obd, obd->u.mds.mds_sb);
-
- lvfs_set_rdonly(lvfs_sbdev(obd->u.mds.mds_sb));
- RETURN(0);
- }
-
- case OBD_IOC_CATLOGLIST: {
- int count = mds->mds_lov_desc.ld_tgt_count;
- rc = llog_catalog_list(obd, count, data);
- RETURN(rc);
-
- }
- case OBD_IOC_LLOG_CHECK:
- case OBD_IOC_LLOG_CANCEL:
- case OBD_IOC_LLOG_REMOVE: {
- struct llog_ctxt *ctxt =
- llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
- int rc2;
-
- obd_llog_finish(obd, mds->mds_lov_desc.ld_tgt_count);
- push_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_lvfs_ctxt, NULL);
- rc = llog_ioctl(ctxt, cmd, data);
- pop_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_lvfs_ctxt, NULL);
- llog_cat_initialize(obd, mds->mds_lov_desc.ld_tgt_count);
- rc2 = obd_set_info(mds->mds_osc_exp, strlen("mds_conn"),
- "mds_conn", 0, NULL);
- if (!rc)
- rc = rc2;
- RETURN(rc);
- }
- case OBD_IOC_LLOG_INFO:
- case OBD_IOC_LLOG_PRINT: {
- struct llog_ctxt *ctxt =
- llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
-
- push_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_lvfs_ctxt, NULL);
- rc = llog_ioctl(ctxt, cmd, data);
- pop_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_lvfs_ctxt, NULL);
-
- RETURN(rc);
- }
-
- case OBD_IOC_ABORT_RECOVERY:
- CERROR("aborting recovery for device %s\n", obd->obd_name);
- target_abort_recovery(obd);
- RETURN(0);
-
- default:
- CDEBUG(D_INFO, "unknown command %x\n", cmd);
- RETURN(-EINVAL);
- }
- RETURN(0);
-
-}
-/* use obd ops to offer management infrastructure */
-static struct obd_ops mgs_obd_ops = {
- .o_owner = THIS_MODULE,
- .o_connect = mgs_connect,
- .o_init_export = mgs_init_export,
- .o_destroy_export = mgs_destroy_export,
- .o_disconnect = mgs_disconnect,
- .o_setup = mgs_setup,
- .o_precleanup = mgs_precleanup,
- .o_cleanup = mgs_cleanup,
- .o_iocontrol = mgs_iocontrol,
- .o_create = mgs_obd_create,
- .o_destroy = mgs_obd_destroy,
- .o_llog_init = mgs_llog_init,
- .o_llog_finish = mgs_llog_finish,
- .o_notify = mgs_notify,
-};
-
-static struct obd_ops mdt_obd_ops = {
- .o_owner = THIS_MODULE,
- .o_setup = mgt_setup,
- .o_cleanup = mgt_cleanup,
-};
-
-static int __init mgs_init(void)
-{
- int rc;
- struct lprocfs_static_vars lvars;
-
- lprocfs_init_vars(mgs, &lvars);
- class_register_type(&mgs_obd_ops, lvars.module_vars, LUSTRE_MGS_NAME);
- lprocfs_init_vars(mgt, &lvars);
- class_register_type(&mgt_obd_ops, lvars.module_vars, LUSTRE_MGT_NAME);
-
- return 0;
-}
-
-static void /*__exit*/ mgs_exit(void)
-{
- class_unregister_type(LUSTRE_MGS_NAME);
- class_unregister_type(LUSTRE_MGT_NAME);
-}
-
-MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
-MODULE_DESCRIPTION("Lustre Management Server (MGS)");
-MODULE_LICENSE("GPL");
-
-module_init(mgs_init);
-module_exit(mgs_exit);
git://git.whamcloud.com / fs / lustre-release.git / commitdiff