-/*
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
* linux/mds/handler.c
- *
+ *
* Lustre Metadata Server (mds) request handler
- *
- * Copyright (C) 2001 Cluster File Systems, Inc.
+ *
+ * Copyright (C) 2001, 2002 Cluster File Systems, Inc.
*
* This code is issued under the GNU General Public License.
* See the file COPYING in this distribution
*
* by Peter Braam <braam@clusterfs.com>
- *
- * This server is single threaded at present (but can easily be multi threaded).
- *
+ *
+ * This server is single threaded at present (but can easily be multi threaded)
+ *
*/
-
#define EXPORT_SYMTAB
#include <linux/version.h>
#include <linux/fs.h>
#include <linux/stat.h>
#include <linux/locks.h>
-#include <linux/ext2_fs.h>
#include <linux/quotaops.h>
#include <asm/unistd.h>
-#include <linux/obd_support.h>
-#include <linux/obd.h>
-#include <linux/lustre_lib.h>
-#include <linux/lustre_idl.h>
-#include <linux/lustre_mds.h>
-#include <linux/obd_class.h>
+#include <asm/uaccess.h>
-// for testing
-static struct mds_obd *MDS;
+#define DEBUG_SUBSYSTEM S_MDS
-// for testing
-static int mds_queue_req(struct mds_request *req)
-{
-
- if (!MDS) {
- EXIT;
- return -1;
- }
-
- list_add(&req->rq_list, &MDS->mds_reqs);
- init_waitqueue_head(&req->rq_wait_for_mds_rep);
- req->rq_obd = MDS;
- wake_up(&MDS->mds_waitq);
- printk("-- sleeping\n");
- interruptible_sleep_on(&req->rq_wait_for_mds_rep);
- printk("-- done\n");
- return 0;
-}
+#include <linux/lustre_mds.h>
+#include <linux/lustre_lib.h>
+#include <linux/lustre_net.h>
-static struct dentry *mds_fid2dentry(struct mds_obd *mds, struct lustre_fid *fid)
+int mds_sendpage(struct ptlrpc_request *req, struct file *file,
+ __u64 offset, struct niobuf *dst)
{
- struct dentry *de;
- struct inode *inode;
-
- inode = iget(mds->mds_sb, fid->id);
- if (!inode) {
- EXIT;
- }
-
- de = d_alloc_root(inode);
- if (!de) {
- iput(inode);
- EXIT;
- return NULL;
- }
-
- de->d_inode = inode;
- return de;
-}
+ int rc = 0;
+ mm_segment_t oldfs = get_fs();
+ struct ptlrpc_bulk_desc *bulk;
+ char *buf;
+
+ bulk = ptlrpc_prep_bulk(req->rq_connection);
+ if (bulk == NULL) {
+ rc = -ENOMEM;
+ GOTO(out, rc);
+ }
-int mds_getattr(struct mds_request *req)
-{
- struct dentry *de = mds_fid2dentry(req->rq_obd, &req->rq_req->fid1);
- struct inode *inode;
- struct mds_rep *rep;
- int rc;
-
- rc = mds_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
- &req->rq_replen, &req->rq_repbuf);
- if (rc) {
- EXIT;
- printk("mds: out of memory\n");
- req->rq_status = -ENOMEM;
- return -ENOMEM;
- }
-
- req->rq_rephdr->seqno = req->rq_reqhdr->seqno;
- rep = req->rq_rep;
-
- if (!de) {
- EXIT;
- req->rq_rephdr->status = -ENOENT;
- return 0;
- }
-
- inode = de->d_inode;
- rep->atime = inode->i_atime;
- rep->ctime = inode->i_ctime;
- rep->mtime = inode->i_mtime;
- rep->uid = inode->i_uid;
- rep->gid = inode->i_gid;
- rep->size = inode->i_size;
- rep->mode = inode->i_mode;
-
- dput(de);
- return 0;
-}
+ bulk->b_xid = req->rq_reqmsg->xid;
-int mds_reply(struct mds_request *req)
-{
- ENTRY;
- kfree(req->rq_reqbuf);
- req->rq_reqbuf = NULL;
- wake_up_interruptible(&req->rq_wait_for_mds_rep);
- EXIT;
- return 0;
-}
+ OBD_ALLOC(buf, PAGE_SIZE);
+ if (!buf) {
+ rc = -ENOMEM;
+ GOTO(cleanup_bulk, rc);
+ }
-int mds_error(struct mds_request *req)
-{
- struct mds_rep_hdr *hdr;
-
- ENTRY;
- hdr = kmalloc(sizeof(*hdr), GFP_KERNEL);
- if (!hdr) {
- EXIT;
- return -ENOMEM;
- }
-
- memset(hdr, 0, sizeof(*hdr));
-
- hdr->seqno = req->rq_reqhdr->seqno;
- hdr->status = req->rq_status;
- hdr->type = MDS_TYPE_ERR;
- req->rq_repbuf = (char *)hdr;
-
- EXIT;
- return mds_reply(req);
-}
+ set_fs(KERNEL_DS);
+ rc = mds_fs_readpage(&req->rq_obd->u.mds, file, buf, PAGE_SIZE,
+ &offset);
+ set_fs(oldfs);
-//int mds_handle(struct mds_conn *conn, int len, char *buf)
-int mds_handle(struct mds_request *req)
-{
- int rc;
- struct mds_req_hdr *hdr;
+ if (rc != PAGE_SIZE) {
+ rc = -EIO;
+ GOTO(cleanup_buf, rc);
+ }
- ENTRY;
+ bulk->b_buf = buf;
+ bulk->b_buflen = PAGE_SIZE;
- hdr = (struct mds_req_hdr *)req->rq_reqbuf;
+ rc = ptlrpc_send_bulk(bulk, MDS_BULK_PORTAL);
+ if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
+ CERROR("obd_fail_loc=%x, fail operation rc=%d\n",
+ OBD_FAIL_MDS_SENDPAGE, rc);
+ PtlMDUnlink(bulk->b_md_h);
+ GOTO(cleanup_buf, rc);
+ }
+ wait_event_interruptible(bulk->b_waitq,
+ ptlrpc_check_bulk_sent(bulk));
- if (NTOH__u32(hdr->type) != MDS_TYPE_REQ) {
- printk("lustre_mds: wrong packet type sent %d\n",
- NTOH__u32(hdr->type));
- rc = -EINVAL;
- goto out;
- }
+ if (bulk->b_flags == PTL_RPC_INTR) {
+ rc = -EINTR;
+ GOTO(cleanup_buf, rc);
+ }
- rc = mds_unpack_req(req->rq_reqbuf, req->rq_reqlen,
- &req->rq_reqhdr, &req->rq_req);
- if (rc) {
- printk("lustre_mds: Invalid request\n");
- EXIT;
- goto out;
- }
+ EXIT;
+ cleanup_buf:
+ OBD_FREE(buf, PAGE_SIZE);
+ cleanup_bulk:
+ OBD_FREE(bulk, sizeof(*bulk));
+ out:
+ return rc;
+}
- switch (req->rq_reqhdr->opc) {
+struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid,
+ struct vfsmount **mnt)
+{
+ /* stolen from NFS */
+ struct super_block *sb = mds->mds_sb;
+ unsigned long ino = fid->id;
+ __u32 generation = fid->generation;
+ struct inode *inode;
+ struct list_head *lp;
+ struct dentry *result;
+
+ if (ino == 0)
+ return ERR_PTR(-ESTALE);
+
+ inode = iget(sb, ino);
+ if (inode == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ CDEBUG(D_DENTRY, "--> mds_fid2dentry: sb %p\n", inode->i_sb);
+
+ if (is_bad_inode(inode) ||
+ (generation && inode->i_generation != generation)) {
+ /* we didn't find the right inode.. */
+ CERROR("bad inode %lu, link: %d ct: %d or version %u/%u\n",
+ inode->i_ino,
+ inode->i_nlink, atomic_read(&inode->i_count),
+ inode->i_generation,
+ generation);
+ LBUG();
+ iput(inode);
+ return ERR_PTR(-ESTALE);
+ }
- case MDS_GETATTR:
- CDEBUG(D_INODE, "getattr\n");
- rc = mds_getattr(req);
- break;
+ /* now to find a dentry.
+ * If possible, get a well-connected one
+ */
+ if (mnt)
+ *mnt = mds->mds_vfsmnt;
+ spin_lock(&dcache_lock);
+ for (lp = inode->i_dentry.next; lp != &inode->i_dentry ; lp=lp->next) {
+ result = list_entry(lp,struct dentry, d_alias);
+ if (! (result->d_flags & DCACHE_NFSD_DISCONNECTED)) {
+ dget_locked(result);
+ result->d_vfs_flags |= DCACHE_REFERENCED;
+ spin_unlock(&dcache_lock);
+ iput(inode);
+ if (mnt)
+ mntget(*mnt);
+ return result;
+ }
+ }
+ spin_unlock(&dcache_lock);
+ result = d_alloc_root(inode);
+ if (result == NULL) {
+ iput(inode);
+ return ERR_PTR(-ENOMEM);
+ }
+ if (mnt)
+ mntget(*mnt);
+ result->d_flags |= DCACHE_NFSD_DISCONNECTED;
+ return result;
+}
- case MDS_OPEN:
- return mds_getattr(req);
+int mds_getattr(struct ptlrpc_request *req)
+{
+ struct dentry *de;
+ struct inode *inode;
+ struct mds_body *body;
+ struct mds_obd *mds = &req->rq_obd->u.mds;
+ int rc, size = sizeof(*body);
+ ENTRY;
- case MDS_SETATTR:
- return mds_getattr(req);
+ rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
+ if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_GETATTR_PACK)) {
+ CERROR("mds: out of memory\n");
+ req->rq_status = -ENOMEM;
+ RETURN(0);
+ }
- case MDS_CREATE:
- return mds_getattr(req);
+ body = lustre_msg_buf(req->rq_reqmsg, 0);
+ de = mds_fid2dentry(mds, &body->fid1, NULL);
+ if (IS_ERR(de)) {
+ req->rq_status = -ENOENT;
+ RETURN(0);
+ }
- case MDS_MKDIR:
- return mds_getattr(req);
+ body = lustre_msg_buf(req->rq_repmsg, 0);
+ inode = de->d_inode;
+ body->ino = inode->i_ino;
+ body->generation = inode->i_generation;
+ body->atime = inode->i_atime;
+ body->ctime = inode->i_ctime;
+ body->mtime = inode->i_mtime;
+ body->uid = inode->i_uid;
+ body->gid = inode->i_gid;
+ body->size = inode->i_size;
+ body->mode = inode->i_mode;
+ body->nlink = inode->i_nlink;
+ body->valid = ~0;
+ mds_fs_get_objid(mds, inode, &body->objid);
+ l_dput(de);
+ RETURN(0);
+}
- case MDS_RMDIR:
- return mds_getattr(req);
+int mds_open(struct ptlrpc_request *req)
+{
+ struct dentry *de;
+ struct mds_body *body;
+ struct file *file;
+ struct vfsmount *mnt;
+ __u32 flags;
+ int rc, size = sizeof(*body);
+ ENTRY;
- case MDS_SYMLINK:
- return mds_getattr(req);
-
- case MDS_LINK:
- return mds_getattr(req);
-
- case MDS_MKNOD:
- return mds_getattr(req);
+ rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
+ if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_OPEN_PACK)) {
+ CERROR("mds: out of memory\n");
+ req->rq_status = -ENOMEM;
+ RETURN(0);
+ }
- case MDS_UNLINK:
- return mds_getattr(req);
+ body = lustre_msg_buf(req->rq_reqmsg, 0);
+ de = mds_fid2dentry(&req->rq_obd->u.mds, &body->fid1, &mnt);
+ if (IS_ERR(de)) {
+ req->rq_status = -ENOENT;
+ RETURN(0);
+ }
+ flags = body->flags;
+ file = dentry_open(de, mnt, flags);
+ if (!file || IS_ERR(file)) {
+ req->rq_status = -EINVAL;
+ RETURN(0);
+ }
- case MDS_RENAME:
- return mds_getattr(req);
+ body = lustre_msg_buf(req->rq_repmsg, 0);
+ body->objid = (__u64) (unsigned long)file;
+ RETURN(0);
+}
- default:
- return mds_error(req);
- }
+int mds_close(struct ptlrpc_request *req)
+{
+ struct dentry *de;
+ struct mds_body *body;
+ struct file *file;
+ struct vfsmount *mnt;
+ int rc;
+ ENTRY;
-out:
- if (rc) {
- printk("mds: processing error %d\n", rc);
- mds_error(req);
- } else {
- CDEBUG(D_INODE, "sending reply\n");
- mds_reply(req);
- }
-
- return 0;
-}
+ rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen, &req->rq_repmsg);
+ if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_CLOSE_PACK)) {
+ CERROR("mds: out of memory\n");
+ req->rq_status = -ENOMEM;
+ RETURN(0);
+ }
+ body = lustre_msg_buf(req->rq_reqmsg, 0);
+ de = mds_fid2dentry(&req->rq_obd->u.mds, &body->fid1, &mnt);
+ if (IS_ERR(de)) {
+ req->rq_status = -ENOENT;
+ RETURN(0);
+ }
-static void mds_timer_run(unsigned long __data)
-{
- struct task_struct * p = (struct task_struct *) __data;
+ file = (struct file *)(unsigned long)body->objid;
+ req->rq_status = filp_close(file, 0);
+ l_dput(de);
+ mntput(mnt);
- wake_up_process(p);
+ RETURN(0);
}
-int mds_main(void *arg)
+int mds_readpage(struct ptlrpc_request *req)
{
- struct mds_obd *mds = (struct mds_obd *) arg;
- struct timer_list timer;
-
- lock_kernel();
- daemonize();
- spin_lock_irq(¤t->sigmask_lock);
- sigfillset(¤t->blocked);
- recalc_sigpending(current);
- spin_unlock_irq(¤t->sigmask_lock);
+ struct vfsmount *mnt;
+ struct dentry *de;
+ struct file *file;
+ struct niobuf *niobuf;
+ struct mds_body *body;
+ int rc, size = sizeof(*body);
+ ENTRY;
- sprintf(current->comm, "lustre_mds");
+ rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
+ if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_READPAGE_PACK)) {
+ CERROR("mds: out of memory\n");
+ req->rq_status = -ENOMEM;
+ RETURN(0);
+ }
- /* Set up an interval timer which can be used to trigger a
- wakeup after the interval expires */
- init_timer(&timer);
- timer.data = (unsigned long) current;
- timer.function = mds_timer_run;
- mds->mds_timer = &timer;
+ body = lustre_msg_buf(req->rq_reqmsg, 0);
+ de = mds_fid2dentry(&req->rq_obd->u.mds, &body->fid1, &mnt);
+ if (IS_ERR(de)) {
+ req->rq_status = PTR_ERR(de);
+ RETURN(0);
+ }
- /* Record that the thread is running */
- mds->mds_thread = current;
- wake_up(&mds->mds_done_waitq);
+ CDEBUG(D_INODE, "ino %ld\n", de->d_inode->i_ino);
- printk(KERN_INFO "lustre_mds starting. Commit interval %d seconds\n",
- mds->mds_interval / HZ);
+ file = dentry_open(de, mnt, O_RDONLY | O_LARGEFILE);
+ /* note: in case of an error, dentry_open puts dentry */
+ if (IS_ERR(file)) {
+ req->rq_status = PTR_ERR(file);
+ RETURN(0);
+ }
- /* XXX maintain a list of all managed devices: insert here */
+ niobuf = lustre_msg_buf(req->rq_reqmsg, 1);
+ if (!niobuf) {
+ req->rq_status = -EINVAL;
+ LBUG();
+ RETURN(0);
+ }
- /* And now, wait forever for commit wakeup events. */
- while (1) {
- struct mds_request *request;
- int rc;
+ /* to make this asynchronous make sure that the handling function
+ doesn't send a reply when this function completes. Instead a
+ callback function would send the reply */
+ rc = mds_sendpage(req, file, body->size, niobuf);
- if (mds->mds_flags & MDS_UNMOUNT)
- break;
+ filp_close(file, 0);
+ req->rq_status = rc;
+ RETURN(0);
+}
+int mds_reint(struct ptlrpc_request *req)
+{
+ int rc;
+ struct mds_update_record rec;
+
+ rc = mds_update_unpack(req, &rec);
+ if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNPACK)) {
+ CERROR("invalid record\n");
+ req->rq_status = -EINVAL;
+ RETURN(0);
+ }
+ /* rc will be used to interrupt a for loop over multiple records */
+ rc = mds_reint_rec(&rec, req);
+ return 0;
+}
- wake_up(&mds->mds_done_waitq);
- interruptible_sleep_on(&mds->mds_waitq);
+int mds_handle(struct obd_device *dev, struct ptlrpc_service *svc,
+ struct ptlrpc_request *req)
+{
+ int rc;
+ ENTRY;
- CDEBUG(D_INODE, "lustre_mds wakes\n");
- CDEBUG(D_INODE, "pick up req here and continue\n");
+ rc = lustre_unpack_msg(req->rq_reqmsg, req->rq_reqlen);
+ if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_HANDLE_UNPACK)) {
+ CERROR("lustre_mds: Invalid request\n");
+ GOTO(out, rc);
+ }
- if (list_empty(&mds->mds_reqs)) {
- CDEBUG(D_INODE, "woke because of timer\n");
- } else {
- request = list_entry(mds->mds_reqs.next,
- struct mds_request, rq_list);
- list_del(&request->rq_list);
- rc = mds_handle(request);
- }
- }
+ if (req->rq_reqmsg->type != PTL_RPC_REQUEST) {
+ CERROR("lustre_mds: wrong packet type sent %d\n",
+ req->rq_reqmsg->type);
+ GOTO(out, rc = -EINVAL);
+ }
- del_timer_sync(mds->mds_timer);
+ switch (req->rq_reqmsg->opc) {
+ case MDS_GETATTR:
+ CDEBUG(D_INODE, "getattr\n");
+ OBD_FAIL_RETURN(OBD_FAIL_MDS_GETATTR_NET, 0);
+ rc = mds_getattr(req);
+ break;
+
+ case MDS_READPAGE:
+ CDEBUG(D_INODE, "readpage\n");
+ OBD_FAIL_RETURN(OBD_FAIL_MDS_READPAGE_NET, 0);
+ rc = mds_readpage(req);
+
+ if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE))
+ return 0;
+ break;
+
+ case MDS_REINT:
+ CDEBUG(D_INODE, "reint\n");
+ OBD_FAIL_RETURN(OBD_FAIL_MDS_REINT_NET, 0);
+ rc = mds_reint(req);
+ break;
+
+ case MDS_OPEN:
+ CDEBUG(D_INODE, "open\n");
+ OBD_FAIL_RETURN(OBD_FAIL_MDS_OPEN_NET, 0);
+ rc = mds_open(req);
+ break;
+
+ case MDS_CLOSE:
+ CDEBUG(D_INODE, "close\n");
+ OBD_FAIL_RETURN(OBD_FAIL_MDS_CLOSE_NET, 0);
+ rc = mds_close(req);
+ break;
+
+ default:
+ rc = ptlrpc_error(svc, req);
+ RETURN(rc);
+ }
- /* XXX maintain a list of all managed devices: cleanup here */
+ EXIT;
+out:
+ if (rc) {
+ ptlrpc_error(svc, req);
+ } else {
+ CDEBUG(D_NET, "sending reply\n");
+ ptlrpc_reply(svc, req);
+ }
- mds->mds_thread = NULL;
- wake_up(&mds->mds_done_waitq);
- printk("lustre_mds: exiting\n");
- return 0;
+ return 0;
}
-static void mds_stop_srv_thread(struct mds_obd *mds)
+static int mds_prep(struct obd_device *obddev)
{
- mds->mds_flags |= MDS_UNMOUNT;
+ struct obd_run_ctxt saved;
+ struct mds_obd *mds = &obddev->u.mds;
+ struct super_operations *s_ops;
+ struct file *f;
+ int err;
+
+ mds->mds_service = ptlrpc_init_svc(128 * 1024,
+ MDS_REQUEST_PORTAL, MDC_REPLY_PORTAL,
+ "self", mds_handle);
+
+ if (!mds->mds_service) {
+ CERROR("failed to start service\n");
+ RETURN(-EINVAL);
+ }
- while (mds->mds_thread) {
- wake_up(&mds->mds_waitq);
- sleep_on(&mds->mds_done_waitq);
- }
-}
+ err = ptlrpc_start_thread(obddev, mds->mds_service, "lustre_mds");
+ if (err) {
+ CERROR("cannot start thread\n");
+ GOTO(err_svc, err);
+ }
-static void mds_start_srv_thread(struct mds_obd *mds)
-{
- init_waitqueue_head(&mds->mds_waitq);
- init_waitqueue_head(&mds->mds_done_waitq);
- kernel_thread(mds_main, (void *)mds,
- CLONE_VM | CLONE_FS | CLONE_FILES);
- while (!mds->mds_thread)
- sleep_on(&mds->mds_done_waitq);
+ push_ctxt(&saved, &mds->mds_ctxt);
+ err = simple_mkdir(current->fs->pwd, "ROOT", 0700);
+ if (err && err != -EEXIST) {
+ CERROR("cannot create ROOT directory\n");
+ GOTO(err_svc, err);
+ }
+ err = simple_mkdir(current->fs->pwd, "FH", 0700);
+ if (err && err != -EEXIST) {
+ CERROR("cannot create FH directory\n");
+ GOTO(err_svc, err);
+ }
+ f = filp_open("last_rcvd", O_RDWR | O_CREAT, 0644);
+ if (IS_ERR(f)) {
+ CERROR("cannot open/create last_rcvd file\n");
+ GOTO(err_svc, err = PTR_ERR(f));
+ }
+ mds->last_rcvd = f;
+ pop_ctxt(&saved);
+
+ /*
+ * Replace the client filesystem delete_inode method with our own,
+ * so that we can clear the object ID before the inode is deleted.
+ * The fs_delete_inode method will call cl_delete_inode for us.
+ *
+ * We need to do this for the MDS superblock only, hence we install
+ * a modified copy of the original superblock method table.
+ *
+ * We still assume that there is only a single MDS client filesystem
+ * type, as we don't have access to the mds struct in * delete_inode.
+ */
+ OBD_ALLOC(s_ops, sizeof(*s_ops));
+ memcpy(s_ops, mds->mds_sb->s_op, sizeof(*s_ops));
+ mds->mds_fsops->cl_delete_inode = s_ops->delete_inode;
+ s_ops->delete_inode = mds->mds_fsops->fs_delete_inode;
+ mds->mds_sb->s_op = s_ops;
+
+ RETURN(0);
+
+err_svc:
+ rpc_unregister_service(mds->mds_service);
+ OBD_FREE(mds->mds_service, sizeof(*mds->mds_service));
+
+ return(err);
}
/* mount the file system (secretly) */
-static int mds_setup(struct obd_device *obddev, obd_count len,
- void *buf)
-
+static int mds_setup(struct obd_device *obddev, obd_count len, void *buf)
{
- struct obd_ioctl_data* data = buf;
- struct mds_obd *mds = &obddev->u.mds;
- struct vfsmount *mnt;
- int err;
+ struct obd_ioctl_data* data = buf;
+ struct mds_obd *mds = &obddev->u.mds;
+ struct vfsmount *mnt;
+ int err = 0;
ENTRY;
-
- mnt = do_kern_mount(data->ioc_inlbuf2, 0,
- data->ioc_inlbuf1, NULL);
- err = PTR_ERR(mnt);
- if (IS_ERR(mnt)) {
- EXIT;
- return err;
- }
-
- mds->mds_sb = mnt->mnt_root->d_inode->i_sb;
- if (!obddev->u.mds.mds_sb) {
- EXIT;
- return -ENODEV;
- }
-
- INIT_LIST_HEAD(&mds->mds_reqs);
- mds->mds_thread = NULL;
- mds->mds_flags = 0;
- mds->mds_interval = 3 * HZ;
- mds->mds_vfsmnt = mnt;
- obddev->u.mds.mds_fstype = strdup(data->ioc_inlbuf2);
-
- mds->mds_ctxt.pwdmnt = mnt;
- mds->mds_ctxt.pwd = mnt->mnt_root;
- mds->mds_ctxt.fs = KERNEL_DS;
- MDS = mds;
-
- spin_lock_init(&obddev->u.mds.fo_lock);
-
- mds_start_srv_thread(mds);
+
+#ifdef CONFIG_DEV_RDONLY
+ dev_clear_rdonly(2);
+#endif
+ mds->mds_fstype = strdup(data->ioc_inlbuf2);
+
+ if (!strcmp(mds->mds_fstype, "ext3"))
+ mds->mds_fsops = &mds_ext3_fs_ops;
+ else if (!strcmp(mds->mds_fstype, "ext2"))
+ mds->mds_fsops = &mds_ext2_fs_ops;
+ else {
+ CERROR("unsupported MDS filesystem type %s\n", mds->mds_fstype);
+ GOTO(err_kfree, (err = -EPERM));
+ }
MOD_INC_USE_COUNT;
- EXIT;
- return 0;
-}
+ mnt = do_kern_mount(mds->mds_fstype, 0, data->ioc_inlbuf1, NULL);
+ if (IS_ERR(mnt)) {
+ CERROR("do_kern_mount failed: %d\n", err);
+ GOTO(err_dec, err = PTR_ERR(mnt));
+ }
+
+ mds->mds_sb = mnt->mnt_root->d_inode->i_sb;
+ if (!mds->mds_sb)
+ GOTO(err_put, (err = -ENODEV));
+
+ mds->mds_vfsmnt = mnt;
+ mds->mds_ctxt.pwdmnt = mnt;
+ mds->mds_ctxt.pwd = mnt->mnt_root;
+ mds->mds_ctxt.fs = KERNEL_DS;
+
+ err = mds_prep(obddev);
+ if (err)
+ GOTO(err_put, err);
+
+ RETURN(0);
+
+err_put:
+ unlock_kernel();
+ mntput(mds->mds_vfsmnt);
+ mds->mds_sb = 0;
+ lock_kernel();
+err_dec:
+ MOD_DEC_USE_COUNT;
+err_kfree:
+ kfree(mds->mds_fstype);
+ return err;
+}
static int mds_cleanup(struct obd_device * obddev)
{
+ struct super_operations *s_ops = NULL;
struct super_block *sb;
- struct mds_obd *mds = &obddev->u.mds;
+ struct mds_obd *mds = &obddev->u.mds;
ENTRY;
- if ( !(obddev->obd_flags & OBD_SET_UP) ) {
- EXIT;
- return 0;
+ if ( !list_empty(&obddev->obd_gen_clients) ) {
+ CERROR("still has clients!\n");
+ RETURN(-EBUSY);
}
- if ( !list_empty(&obddev->obd_gen_clients) ) {
- printk(KERN_WARNING __FUNCTION__ ": still has clients!\n");
- EXIT;
- return -EBUSY;
+ ptlrpc_stop_thread(mds->mds_service);
+ rpc_unregister_service(mds->mds_service);
+ if (!list_empty(&mds->mds_service->srv_reqs)) {
+ // XXX reply with errors and clean up
+ CERROR("Request list not empty!\n");
}
+ OBD_FREE(mds->mds_service, sizeof(*mds->mds_service));
- MDS = NULL;
- mds_stop_srv_thread(mds);
sb = mds->mds_sb;
- if (!mds->mds_sb){
- EXIT;
- return 0;
- }
+ if (!mds->mds_sb)
+ RETURN(0);
+
+ if (mds->last_rcvd) {
+ int rc = filp_close(mds->last_rcvd, 0);
+ mds->last_rcvd = NULL;
- if (!list_empty(&mds->mds_reqs)) {
- // XXX reply with errors and clean up
- CDEBUG(D_INODE, "Request list not empty!\n");
- }
+ if (rc)
+ CERROR("last_rcvd file won't close, rc=%d\n", rc);
+ }
+ s_ops = sb->s_op;
- unlock_kernel();
- mntput(mds->mds_vfsmnt);
+ unlock_kernel();
+ mntput(mds->mds_vfsmnt);
mds->mds_sb = 0;
- kfree(mds->mds_fstype);
- lock_kernel();
-
+ kfree(mds->mds_fstype);
+ lock_kernel();
+#ifdef CONFIG_DEV_RDONLY
+ dev_clear_rdonly(2);
+#endif
+ OBD_FREE(s_ops, sizeof(*s_ops));
MOD_DEC_USE_COUNT;
- EXIT;
- return 0;
+ RETURN(0);
}
/* use obd ops to offer management infrastructure */
static int __init mds_init(void)
{
obd_register_type(&mds_obd_ops, LUSTRE_MDS_NAME);
- return 0;
+ return 0;
}
static void __exit mds_exit(void)
{
- obd_unregister_type(LUSTRE_MDS_NAME);
+ obd_unregister_type(LUSTRE_MDS_NAME);
}
MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
MODULE_DESCRIPTION("Lustre Metadata Server (MDS) v0.01");
MODULE_LICENSE("GPL");
-
-// for testing (maybe this stays)
-EXPORT_SYMBOL(mds_queue_req);
-
module_init(mds_init);
module_exit(mds_exit);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff