/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * linux/mds/handler.c
- *
+ * lustre/mds/handler.c
* Lustre Metadata Server (mds) request handler
*
- * Copyright (C) 2001, 2002 Cluster File Systems, Inc.
+ * Copyright (c) 2001, 2002 Cluster File Systems, Inc.
+ * Author: Peter Braam <braam@clusterfs.com>
+ * Author: Andreas Dilger <adilger@clusterfs.com>
+ * Author: Phil Schwan <phil@clusterfs.com>
*
- * This code is issued under the GNU General Public License.
- * See the file COPYING in this distribution
+ * This file is part of Lustre, http://www.lustre.org.
*
- * by Peter Braam <braam@clusterfs.com> &
- * Andreas Dilger <braam@clusterfs.com>
+ * 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.
*
- * This server is single threaded at present (but can easily be multi threaded)
+ * Lustre is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
*
+ * You should have received a copy of the GNU General Public License
+ * along with Lustre; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define EXPORT_SYMTAB
#include <linux/module.h>
#include <linux/lustre_mds.h>
#include <linux/lustre_dlm.h>
+#include <linux/init.h>
+#include <linux/obd_class.h>
+#include <linux/random.h>
+#include <linux/locks.h>
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
+#include <linux/buffer_head.h>
+#endif
+#include <linux/lprocfs_status.h>
+
+static kmem_cache_t *mds_file_cache;
+
+extern int mds_get_lovtgts(struct mds_obd *obd, int tgt_count,
+ obd_uuid_t *uuidarray);
+extern int mds_get_lovdesc(struct mds_obd *obd, struct lov_desc *desc);
extern int mds_update_last_rcvd(struct mds_obd *mds, void *handle,
- struct ptlrpc_request *req);
+ struct ptlrpc_request *req);
static int mds_cleanup(struct obd_device * obddev);
+extern lprocfs_vars_t status_var_nm_1[];
+extern lprocfs_vars_t status_class_var[];
+
+inline struct mds_obd *mds_req2mds(struct ptlrpc_request *req)
+{
+ return &req->rq_export->exp_obd->u.mds;
+}
+
+static int mds_bulk_timeout(void *data)
+{
+ struct ptlrpc_bulk_desc *desc = data;
+
+ ENTRY;
+ CERROR("(not yet) starting recovery of client %p\n", desc->bd_client);
+ RETURN(1);
+}
+
/* Assumes caller has already pushed into the kernel filesystem context */
static int mds_sendpage(struct ptlrpc_request *req, struct file *file,
__u64 offset)
{
int rc = 0;
- struct mds_obd *mds = &req->rq_obd->u.mds;
+ struct mds_obd *mds = mds_req2mds(req);
struct ptlrpc_bulk_desc *desc;
struct ptlrpc_bulk_page *bulk;
+ struct l_wait_info lwi;
char *buf;
ENTRY;
if (rc != PAGE_SIZE)
GOTO(cleanup_buf, rc = -EIO);
- bulk->b_xid = req->rq_xid;
- bulk->b_buf = buf;
- bulk->b_buflen = PAGE_SIZE;
- desc->b_portal = MDS_BULK_PORTAL;
+ bulk->bp_xid = req->rq_xid;
+ bulk->bp_buf = buf;
+ bulk->bp_buflen = PAGE_SIZE;
+ desc->bd_portal = MDS_BULK_PORTAL;
rc = ptlrpc_send_bulk(desc);
if (rc)
GOTO(cleanup_buf, rc);
}
- wait_event_interruptible(desc->b_waitq, ptlrpc_check_bulk_sent(desc));
- if (desc->b_flags & PTL_RPC_FL_INTR)
- GOTO(cleanup_buf, rc = -EINTR);
+ lwi = LWI_TIMEOUT(obd_timeout * HZ, mds_bulk_timeout, desc);
+ rc = l_wait_event(desc->bd_waitq, desc->bd_flags & PTL_BULK_FL_SENT, &lwi);
+ if (rc) {
+ if (rc != -ETIMEDOUT)
+ LBUG();
+ GOTO(cleanup_buf, rc);
+ }
EXIT;
cleanup_buf:
return rc;
}
+/*
+ * Look up a named entry in a directory, and get an LDLM lock on it.
+ * 'dir' is a inode for which an LDLM lock has already been taken.
+ *
+ * If we do not need an exclusive or write lock on this entry (e.g.
+ * a read lock for attribute lookup only) then we do not hold the
+ * directory on return. It is up to the caller to know what type
+ * of lock it is getting, and clean up appropriately.
+ */
+struct dentry *mds_name2locked_dentry(struct obd_device *obd,
+ struct dentry *dir, struct vfsmount **mnt,
+ char *name, int namelen, int lock_mode,
+ struct lustre_handle *lockh,
+ int dir_lock_mode)
+{
+ struct dentry *dchild;
+ int flags = 0, rc;
+ __u64 res_id[3] = {0};
+ ENTRY;
+
+ down(&dir->d_inode->i_sem);
+ dchild = lookup_one_len(name, dir, namelen);
+ if (IS_ERR(dchild)) {
+ CERROR("child lookup error %ld\n", PTR_ERR(dchild));
+ up(&dir->d_inode->i_sem);
+ LBUG();
+ RETURN(dchild);
+ }
+ if (dir_lock_mode != LCK_EX && dir_lock_mode != LCK_PW) {
+ up(&dir->d_inode->i_sem);
+ ldlm_lock_decref(lockh, dir_lock_mode);
+ }
+
+ if (lock_mode == 0 || !dchild->d_inode)
+ RETURN(dchild);
+
+ res_id[0] = dchild->d_inode->i_ino;
+ res_id[1] = dchild->d_inode->i_generation;
+ rc = ldlm_match_or_enqueue(NULL, NULL, obd->obd_namespace, NULL,
+ res_id, LDLM_PLAIN, NULL, 0, lock_mode,
+ &flags, ldlm_completion_ast,
+ mds_blocking_ast, NULL, 0, lockh);
+ if (rc != ELDLM_OK) {
+ l_dput(dchild);
+ up(&dir->d_inode->i_sem);
+ RETURN(ERR_PTR(-ENOLCK)); /* XXX translate ldlm code */
+ }
+
+ RETURN(dchild);
+}
+
+struct dentry *mds_fid2locked_dentry(struct obd_device *obd, struct ll_fid *fid,
+ struct vfsmount **mnt, int lock_mode,
+ struct lustre_handle *lockh)
+{
+ struct mds_obd *mds = &obd->u.mds;
+ struct dentry *de = mds_fid2dentry(mds, fid, mnt), *retval = de;
+ int flags = 0, rc;
+ __u64 res_id[3] = {0};
+ ENTRY;
+
+ if (IS_ERR(de))
+ RETURN(de);
+
+ res_id[0] = de->d_inode->i_ino;
+ res_id[1] = de->d_inode->i_generation;
+ rc = ldlm_match_or_enqueue(NULL, NULL, obd->obd_namespace, NULL,
+ res_id, LDLM_PLAIN, NULL, 0, lock_mode,
+ &flags, ldlm_completion_ast,
+ mds_blocking_ast, NULL, 0, lockh);
+ if (rc != ELDLM_OK) {
+ l_dput(de);
+ retval = ERR_PTR(-ENOLCK); /* XXX translate ldlm code */
+ }
+
+ RETURN(retval);
+}
+
+#ifndef DCACHE_DISCONNECTED
+#define DCACHE_DISCONNECTED DCACHE_NFSD_DISCONNECTED
+#endif
+
+/* Look up an entry by inode number. */
struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid,
struct vfsmount **mnt)
{
RETURN(ERR_PTR(-ESTALE));
}
- /* now to find a dentry.
- * If possible, get a well-connected one
- */
+ /* 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)) {
+ list_for_each(lp, &inode->i_dentry) {
+ result = list_entry(lp, struct dentry, d_alias);
+ if (!(result->d_flags & DCACHE_DISCONNECTED)) {
dget_locked(result);
result->d_vfs_flags |= DCACHE_REFERENCED;
spin_unlock(&dcache_lock);
}
if (mnt)
mntget(*mnt);
- result->d_flags |= DCACHE_NFSD_DISCONNECTED;
+ result->d_flags |= DCACHE_DISCONNECTED;
return result;
}
-static int mds_connect(struct ptlrpc_request *req, struct mds_obd **mdsp)
+/* Establish a connection to the MDS.
+ *
+ * This will set up an export structure for the client to hold state data
+ * about that client, like open files, the last operation number it did
+ * on the server, etc.
+ */
+static int mds_connect(struct lustre_handle *conn, struct obd_device *obd,
+ obd_uuid_t cluuid, struct recovd_obd *recovd,
+ ptlrpc_recovery_cb_t recover)
{
- struct mds_obd *mds;
- char *uuid;
- int rc, i;
+ struct obd_export *exp;
+ struct mds_export_data *med;
+ struct mds_client_data *mcd;
+ struct list_head *p;
+ int rc;
ENTRY;
- uuid = lustre_msg_buf(req->rq_reqmsg, 0);
- if (req->rq_reqmsg->buflens[0] > 37) {
- /* Invalid UUID */
- req->rq_status = -EINVAL;
+ if (!conn || !obd || !cluuid)
RETURN(-EINVAL);
- }
- i = obd_class_name2dev(uuid);
- if (i == -1) {
- req->rq_status = -ENODEV;
- RETURN(-ENODEV);
- }
+ MOD_INC_USE_COUNT;
- *mdsp = mds = &(obd_dev[i].u.mds);
- if (mds != &(req->rq_obd->u.mds)) {
- CERROR("device %d (%s) is not an mds\n", i, uuid);
- req->rq_status = -ENODEV;
- RETURN(-ENODEV);
+ spin_lock(&obd->obd_dev_lock);
+ list_for_each(p, &obd->obd_exports) {
+ exp = list_entry(p, struct obd_export, exp_obd_chain);
+ mcd = exp->exp_mds_data.med_mcd;
+ if (!memcmp(cluuid, mcd->mcd_uuid, sizeof(mcd->mcd_uuid))) {
+ LASSERT(exp->exp_obd == obd);
+
+ if (!list_empty(&exp->exp_conn_chain)) {
+ CERROR("existing uuid/export, list not empty!\n");
+ spin_unlock(&obd->obd_dev_lock);
+ /* XXX should we MOD_DEC_USE_COUNT; here? */
+ RETURN(-EALREADY);
+ }
+ conn->addr = (__u64) (unsigned long)exp;
+ conn->cookie = exp->exp_cookie;
+ spin_unlock(&obd->obd_dev_lock);
+ CDEBUG(D_INFO, "existing export for UUID '%s' at %p\n",
+ cluuid, exp);
+ CDEBUG(D_IOCTL,"connect: addr %Lx cookie %Lx\n",
+ (long long)conn->addr, (long long)conn->cookie);
+ MOD_DEC_USE_COUNT;
+ RETURN(0);
+ }
}
-
- CDEBUG(D_INFO, "MDS connect from UUID '%s'\n",
- ptlrpc_req_to_uuid(req));
- rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen, &req->rq_repmsg);
- if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_CONNECT_PACK)) {
- req->rq_status = -ENOMEM;
- RETURN(-ENOMEM);
+ spin_unlock(&obd->obd_dev_lock);
+ /* XXX There is a small race between checking the list and adding a
+ * new connection for the same UUID, but the real threat (list
+ * corruption when multiple different clients connect) is solved.
+ */
+ rc = class_connect(conn, obd, cluuid);
+ if (rc)
+ GOTO(out_dec, rc);
+ exp = class_conn2export(conn);
+ LASSERT(exp);
+ med = &exp->exp_mds_data;
+
+ OBD_ALLOC(mcd, sizeof(*mcd));
+ if (!mcd) {
+ CERROR("mds: out of memory for client data\n");
+ GOTO(out_export, rc = -ENOMEM);
}
- req->rq_repmsg->target_id = i;
+
+ memcpy(mcd->mcd_uuid, cluuid, sizeof(mcd->mcd_uuid));
+ med->med_mcd = mcd;
+
+ INIT_LIST_HEAD(&med->med_open_head);
+ spin_lock_init(&med->med_open_lock);
+
+ rc = mds_client_add(med, -1);
+ if (rc)
+ GOTO(out_mdc, rc);
RETURN(0);
+
+out_mdc:
+ OBD_FREE(mcd, sizeof(*mcd));
+out_export:
+ class_disconnect(conn);
+out_dec:
+ MOD_DEC_USE_COUNT;
+
+ return rc;
+}
+
+/* Call with med->med_open_lock held, please. */
+inline int mds_close_mfd(struct mds_file_data *mfd, struct mds_export_data *med)
+{
+ struct file *file = mfd->mfd_file;
+ LASSERT(file->private_data == mfd);
+
+ list_del(&mfd->mfd_list);
+ mfd->mfd_servercookie = DEAD_HANDLE_MAGIC;
+ kmem_cache_free(mds_file_cache, mfd);
+
+ return filp_close(file, 0);
+}
+
+static int mds_disconnect(struct lustre_handle *conn)
+{
+ struct obd_export *export = class_conn2export(conn);
+ struct list_head *tmp, *n;
+ struct mds_export_data *med = &export->exp_mds_data;
+ int rc;
+ ENTRY;
+
+ /*
+ * Close any open files.
+ */
+ spin_lock(&med->med_open_lock);
+ list_for_each_safe(tmp, n, &med->med_open_head) {
+ struct mds_file_data *mfd =
+ list_entry(tmp, struct mds_file_data, mfd_list);
+ rc = mds_close_mfd(mfd, med);
+ if (rc) {
+ /* XXX better diagnostics, with file path and stuff */
+ CDEBUG(D_INODE, "Error %d closing mfd %p\n", rc, mfd);
+ }
+ }
+ spin_unlock(&med->med_open_lock);
+
+ ldlm_cancel_locks_for_export(export);
+ mds_client_free(export);
+
+ rc = class_disconnect(conn);
+ if (!rc)
+ MOD_DEC_USE_COUNT;
+
+ RETURN(rc);
}
-/* FIXME: the error cases need fixing to avoid leaks */
-static int mds_getstatus(struct mds_obd *mds, struct ptlrpc_request *req)
+/*
+ * XXX This is NOT guaranteed to flush all transactions to disk (even though
+ * it is equivalent to calling sync()) because it only _starts_ the flush
+ * and does not wait for completion. It's better than nothing though.
+ * What we really want is a mild form of fsync_dev_lockfs(), but it is
+ * non-standard, or enabling do_sync_supers in ext3, just for this call.
+ */
+static void mds_fsync_super(struct super_block *sb)
{
+ lock_kernel();
+ lock_super(sb);
+ if (sb->s_dirt && sb->s_op && sb->s_op->write_super)
+ sb->s_op->write_super(sb);
+ unlock_super(sb);
+ unlock_kernel();
+}
+
+static int mds_getstatus(struct ptlrpc_request *req)
+{
+ struct mds_obd *mds = mds_req2mds(req);
struct mds_body *body;
- struct mds_client_info *mci;
- struct mds_client_data *mcd;
int rc, size = sizeof(*body);
ENTRY;
RETURN(0);
}
- body = lustre_msg_buf(req->rq_reqmsg, 0);
- mds_unpack_body(body);
- /* Anything we need to do here with the client's trans no or so? */
+ /* Flush any outstanding transactions to disk so the client will
+ * get the latest last_committed value and can drop their local
+ * requests if they have any. This would be fsync_super() if it
+ * was exported.
+ */
+ mds_fsync_super(mds->mds_sb);
body = lustre_msg_buf(req->rq_repmsg, 0);
memcpy(&body->fid1, &mds->mds_rootfid, sizeof(body->fid1));
- mci = mds_uuid_to_mci(mds, ptlrpc_req_to_uuid(req));
- if (!mci) {
- /* We don't have any old connection data for this client */
- int rc;
+ /* the last_committed and last_xid fields are filled in for all
+ * replies already - no need to do so here also.
+ */
+ RETURN(0);
+}
- CDEBUG(D_INFO, "allocating new client data for UUID '%s'",
- ptlrpc_req_to_uuid(req));
+static int mds_getlovinfo(struct ptlrpc_request *req)
+{
+ struct mds_obd *mds = mds_req2mds(req);
+ struct mds_status_req *streq;
+ struct lov_desc *desc;
+ int tgt_count;
+ int rc, size[2] = {sizeof(*desc)};
+ ENTRY;
- OBD_ALLOC(mcd, sizeof(*mcd));
- if (!mcd) {
- CERROR("mds: out of memory for client data\n");
- req->rq_status = -ENOMEM;
- RETURN(0);
- }
- memcpy(mcd->mcd_uuid, ptlrpc_req_to_uuid(req),
- sizeof(mcd->mcd_uuid));
- rc = mds_client_add(mds, mcd, -1);
- if (rc) {
- req->rq_status = rc;
- RETURN(0);
- }
- } else {
- /* We have old connection data for this client... */
- mcd = mci->mci_mcd;
- CDEBUG(D_INFO, "found existing data for UUID '%s' at #%d\n",
- mcd->mcd_uuid, mci->mci_off);
+ streq = lustre_msg_buf(req->rq_reqmsg, 0);
+ streq->flags = NTOH__u32(streq->flags);
+ streq->repbuf = NTOH__u32(streq->repbuf);
+ size[1] = streq->repbuf;
+
+ rc = lustre_pack_msg(2, size, NULL, &req->rq_replen, &req->rq_repmsg);
+ if (rc) {
+ CERROR("mds: out of memory for message: size=%d\n", size[1]);
+ req->rq_status = -ENOMEM;
+ RETURN(0);
+ }
+
+ desc = lustre_msg_buf(req->rq_repmsg, 0);
+ rc = mds_get_lovdesc(mds, desc);
+ if (rc) {
+ CERROR("mds_get_lovdesc error %d", rc);
+ req->rq_status = rc;
+ RETURN(0);
+ }
+
+ tgt_count = le32_to_cpu(desc->ld_tgt_count);
+ if (tgt_count * sizeof(obd_uuid_t) > streq->repbuf) {
+ CERROR("too many targets, enlarge client buffers\n");
+ req->rq_status = -ENOSPC;
+ RETURN(0);
+ }
+
+ mds->mds_max_mdsize = sizeof(struct lov_mds_md) +
+ tgt_count * sizeof(struct lov_object_id);
+ rc = mds_get_lovtgts(mds, tgt_count,
+ lustre_msg_buf(req->rq_repmsg, 1));
+ if (rc) {
+ CERROR("get_lovtgts error %d\n", rc);
+ req->rq_status = rc;
+ RETURN(0);
}
- /* mcd_last_xid is is stored in little endian on the disk and
- mds_pack_rep_body converts it to network order */
- body->last_xid = le32_to_cpu(mcd->mcd_last_xid);
- mds_pack_rep_body(req);
RETURN(0);
}
-static int mds_disconnect(struct mds_obd *mds, struct ptlrpc_request *req)
+int mds_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
+ void *data, __u32 data_len, int flag)
{
- struct mds_body *body;
- int rc;
+ int do_ast;
ENTRY;
- body = lustre_msg_buf(req->rq_reqmsg, 0);
+ if (flag == LDLM_CB_CANCELING) {
+ /* Don't need to do anything here. */
+ RETURN(0);
+ }
- rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen, &req->rq_repmsg);
- if (rc)
- RETURN(rc);
+ /* XXX layering violation! -phil */
+ l_lock(&lock->l_resource->lr_namespace->ns_lock);
+ lock->l_flags |= LDLM_FL_CBPENDING;
+ do_ast = (!lock->l_readers && !lock->l_writers);
+ l_unlock(&lock->l_resource->lr_namespace->ns_lock);
+ if (do_ast) {
+ struct lustre_handle lockh;
+ int rc;
+
+ LDLM_DEBUG(lock, "already unused, calling ldlm_cli_cancel");
+ ldlm_lock2handle(lock, &lockh);
+ rc = ldlm_cli_cancel(&lockh);
+ if (rc < 0)
+ CERROR("ldlm_cli_cancel: %d\n", rc);
+ } else
+ LDLM_DEBUG(lock, "Lock still has references, will be"
+ "cancelled later");
RETURN(0);
}
-int mds_lock_callback(struct lustre_handle *lockh, struct ldlm_lock_desc *desc,
- void *data, int data_len, struct ptlrpc_request **reqp)
+static int mds_getattr_internal(struct mds_obd *mds, struct dentry *dentry,
+ struct ptlrpc_request *req,
+ struct mds_body *reqbody, int reply_off)
{
+ struct mds_body *body;
+ struct inode *inode = dentry->d_inode;
+ int rc;
ENTRY;
- if (new == NULL) {
- /* Completion AST. Do nothing */
- RETURN(0);
- }
+ if (inode == NULL)
+ RETURN(-ENOENT);
- if (ldlm_cli_cancel(lockh) < 0)
- LBUG();
+ body = lustre_msg_buf(req->rq_repmsg, reply_off);
+
+ mds_pack_inode2fid(&body->fid1, inode);
+ mds_pack_inode2body(body, inode);
+
+ if (S_ISREG(inode->i_mode)) {
+ struct lov_mds_md *lmm;
+
+ lmm = lustre_msg_buf(req->rq_repmsg, reply_off + 1);
+ lmm->lmm_easize = mds->mds_max_mdsize;
+ rc = mds_fs_get_md(mds, inode, lmm);
+
+ if (rc < 0) {
+ if (rc == -ENODATA)
+ RETURN(0);
+ CERROR("mds_fs_get_md failed: %d\n", rc);
+ RETURN(rc);
+ }
+ body->valid |= OBD_MD_FLEASIZE;
+ } else if (S_ISLNK(inode->i_mode) && reqbody->valid & OBD_MD_LINKNAME) {
+ char *symname = lustre_msg_buf(req->rq_repmsg, reply_off + 1);
+ int len = req->rq_repmsg->buflens[reply_off + 1];
+
+ rc = inode->i_op->readlink(dentry, symname, len);
+ if (rc < 0) {
+ CERROR("readlink failed: %d\n", rc);
+ RETURN(rc);
+ } else
+ CDEBUG(D_INODE, "read symlink dest %s\n", symname);
+
+ body->valid |= OBD_MD_LINKNAME;
+ }
RETURN(0);
}
static int mds_getattr_name(int offset, struct ptlrpc_request *req)
{
- struct mds_obd *mds = &req->rq_obd->u.mds;
+ struct mds_obd *mds = mds_req2mds(req);
+ struct obd_device *obd = req->rq_export->exp_obd;
struct obd_run_ctxt saved;
struct mds_body *body;
struct dentry *de = NULL, *dchild = NULL;
struct inode *dir;
- struct ldlm_lock *lock;
struct lustre_handle lockh;
char *name;
- int namelen, flags, lock_mode, rc = 0;
+ int namelen, flags = 0, lock_mode, rc = 0;
+ struct obd_ucred uc;
__u64 res_id[3] = {0, 0, 0};
ENTRY;
- if (strcmp(req->rq_obd->obd_type->typ_name, "mds") != 0)
- LBUG();
+ LASSERT(!strcmp(req->rq_export->exp_obd->obd_type->typ_name, "mds"));
if (req->rq_reqmsg->bufcount <= offset + 1) {
LBUG();
if (offset)
offset = 1;
- push_ctxt(&saved, &mds->mds_ctxt);
+ uc.ouc_fsuid = body->fsuid;
+ uc.ouc_fsgid = body->fsgid;
+ push_ctxt(&saved, &mds->mds_ctxt, &uc);
de = mds_fid2dentry(mds, &body->fid1, NULL);
if (IS_ERR(de)) {
LBUG();
}
dir = de->d_inode;
- CDEBUG(D_INODE, "parent ino %ld\n", dir->i_ino);
+ CDEBUG(D_INODE, "parent ino %ld, name %*s\n", dir->i_ino,namelen,name);
lock_mode = (req->rq_reqmsg->opc == MDS_REINT) ? LCK_CW : LCK_PW;
res_id[0] = dir->i_ino;
+ res_id[1] = dir->i_generation;
- rc = ldlm_lock_match(mds->mds_local_namespace, res_id, LDLM_PLAIN,
+ rc = ldlm_lock_match(obd->obd_namespace, res_id, LDLM_PLAIN,
NULL, 0, lock_mode, &lockh);
if (rc == 0) {
- LDLM_DEBUG_NOLOCK("enqueue res %Lu", res_id[0]);
- rc = ldlm_cli_enqueue(mds->mds_ldlm_client, mds->mds_ldlm_conn,
- NULL, mds->mds_local_namespace, NULL,
+ LDLM_DEBUG_NOLOCK("enqueue res "LPU64, res_id[0]);
+ rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, NULL,
res_id, LDLM_PLAIN, NULL, 0, lock_mode,
- &flags, (void *)mds_lock_callback,
- NULL, 0, &lockh);
+ &flags, ldlm_completion_ast,
+ mds_blocking_ast, NULL, 0, &lockh);
if (rc != ELDLM_OK) {
CERROR("lock enqueue: err: %d\n", rc);
GOTO(out_create_de, rc = -EIO);
}
- } else {
- lock = lustre_handle2object(&lockh);
- LDLM_DEBUG(lock, "matched");
}
ldlm_lock_dump((void *)(unsigned long)lockh.addr);
down(&dir->i_sem);
dchild = lookup_one_len(name, de, namelen - 1);
if (IS_ERR(dchild)) {
- CERROR("child lookup error %ld\n", PTR_ERR(dchild));
+ CDEBUG(D_INODE, "child lookup error %ld\n", PTR_ERR(dchild));
up(&dir->i_sem);
LBUG();
GOTO(out_create_dchild, rc = -ESTALE);
}
- if (dchild->d_inode) {
- struct mds_body *body;
- struct obdo *obdo;
- struct inode *inode = dchild->d_inode;
- CERROR("child exists (dir %ld, name %s, ino %ld)\n",
- dir->i_ino, name, dchild->d_inode->i_ino);
-
- body = lustre_msg_buf(req->rq_repmsg, offset);
- mds_pack_inode2fid(&body->fid1, inode);
- mds_pack_inode2body(body, inode);
- if (S_ISREG(inode->i_mode)) {
- obdo = lustre_msg_buf(req->rq_repmsg, offset + 1);
- mds_fs_get_obdo(mds, inode, obdo);
- }
- /* now a normal case for intent locking */
- rc = 0;
- } else {
- rc = -ENOENT;
- }
+ rc = mds_getattr_internal(mds, dchild, req, body, offset);
EXIT;
out_create_dchild:
l_dput(dchild);
up(&dir->i_sem);
- lock = lustre_handle2object(&lockh);
- ldlm_lock_decref(lock, lock_mode);
+ ldlm_lock_decref(&lockh, lock_mode);
out_create_de:
l_dput(de);
out_pre_de:
return 0;
}
-
static int mds_getattr(int offset, struct ptlrpc_request *req)
{
- struct mds_obd *mds = &req->rq_obd->u.mds;
+ struct mds_obd *mds = mds_req2mds(req);
struct obd_run_ctxt saved;
struct dentry *de;
struct inode *inode;
struct mds_body *body;
- int rc, size[2] = {sizeof(*body)}, bufcount = 1;
+ struct obd_ucred uc;
+ int rc = 0, size[2] = {sizeof(*body)}, bufcount = 1;
ENTRY;
body = lustre_msg_buf(req->rq_reqmsg, offset);
- push_ctxt(&saved, &mds->mds_ctxt);
+ uc.ouc_fsuid = body->fsuid;
+ uc.ouc_fsgid = body->fsgid;
+ push_ctxt(&saved, &mds->mds_ctxt, &uc);
de = mds_fid2dentry(mds, &body->fid1, NULL);
if (IS_ERR(de)) {
- GOTO(out_pop, rc = -ENOENT);
+ rc = req->rq_status = -ENOENT;
+ GOTO(out_pop, PTR_ERR(de));
}
inode = de->d_inode;
if (S_ISREG(body->fid1.f_type)) {
bufcount = 2;
- size[1] = sizeof(struct obdo);
+ size[1] = mds->mds_max_mdsize;
} else if (body->valid & OBD_MD_LINKNAME) {
bufcount = 2;
- size[1] = inode->i_size;
+ size[1] = MIN(inode->i_size + 1, body->size);
+ CDEBUG(D_INODE, "symlink size: %d, reply space: %d\n",
+ inode->i_size + 1, body->size);
+ }
+
+ if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETATTR_PACK)) {
+ CERROR("failed GETATTR_PACK test\n");
+ req->rq_status = -ENOMEM;
+ GOTO(out, rc = -ENOMEM);
}
rc = lustre_pack_msg(bufcount, size, NULL, &req->rq_replen,
&req->rq_repmsg);
- if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_GETATTR_PACK)) {
- CERROR("mds: out of memory\n");
+ if (rc) {
+ CERROR("out of memory or FAIL_MDS_GETATTR_PACK\n");
+ req->rq_status = rc;
GOTO(out, rc);
}
- if (body->valid & OBD_MD_LINKNAME) {
- char *tmp = lustre_msg_buf(req->rq_repmsg, 1);
-
- rc = inode->i_op->readlink(de, tmp, size[1]);
+ req->rq_status = mds_getattr_internal(mds, de, req, body, 0);
- if (rc < 0) {
- CERROR("readlink failed: %d\n", rc);
- GOTO(out, rc);
- }
- }
-
- body = lustre_msg_buf(req->rq_repmsg, 0);
- 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; /* FIXME: should be more selective */
-
- if (S_ISREG(inode->i_mode)) {
- rc = mds_fs_get_obdo(mds, inode,
- lustre_msg_buf(req->rq_repmsg, 1));
- if (rc < 0) {
- CERROR("mds_fs_get_obdo failed: %d\n", rc);
- GOTO(out, rc);
- }
- }
out:
l_dput(de);
out_pop:
pop_ctxt(&saved);
- req->rq_status = rc;
- RETURN(0);
+ RETURN(rc);
}
static int mds_statfs(struct ptlrpc_request *req)
{
- struct mds_obd *mds = &req->rq_obd->u.mds;
+ struct mds_obd *mds = mds_req2mds(req);
struct obd_statfs *osfs;
struct statfs sfs;
int rc, size = sizeof(*osfs);
}
osfs = lustre_msg_buf(req->rq_repmsg, 0);
memset(osfs, 0, size);
- /* FIXME: hack until the MDS gets the OST data, next month */
- sfs.f_blocks = -1;
- sfs.f_bfree = -1;
- sfs.f_bavail = -1;
- obd_statfs_pack(osfs, &sfs);
+ statfs_pack(osfs, &sfs);
+ obd_statfs_pack(osfs, osfs);
out:
req->rq_status = rc;
RETURN(0);
}
+static struct mds_file_data *mds_handle2mfd(struct lustre_handle *handle)
+{
+ struct mds_file_data *mfd = NULL;
+
+ if (!handle || !handle->addr)
+ RETURN(NULL);
+
+ mfd = (struct mds_file_data *)(unsigned long)(handle->addr);
+ if (!kmem_cache_validate(mds_file_cache, mfd))
+ RETURN(NULL);
+
+ if (mfd->mfd_servercookie != handle->cookie)
+ RETURN(NULL);
+
+ return mfd;
+}
+
+static int mds_store_ea(struct mds_obd *mds, struct ptlrpc_request *req,
+ struct mds_body *body, struct dentry *de,
+ struct lov_mds_md *lmm)
+{
+ struct obd_run_ctxt saved;
+ struct obd_ucred uc;
+ void *handle;
+ int rc, rc2;
+
+ uc.ouc_fsuid = body->fsuid;
+ uc.ouc_fsgid = body->fsgid;
+ push_ctxt(&saved, &mds->mds_ctxt, &uc);
+ handle = mds_fs_start(mds, de->d_inode, MDS_FSOP_SETATTR);
+ if (!handle)
+ GOTO(out_ea, rc = -ENOMEM);
+
+ rc = mds_fs_set_md(mds, de->d_inode, handle, lmm);
+ if (!rc)
+ rc = mds_update_last_rcvd(mds, handle, req);
+
+ rc2 = mds_fs_commit(mds, de->d_inode, handle);
+ if (rc2 && !rc)
+ rc = rc2;
+out_ea:
+ pop_ctxt(&saved);
+
+ return rc;
+}
+
static int mds_open(struct ptlrpc_request *req)
{
- struct dentry *de;
+ struct mds_obd *mds = mds_req2mds(req);
struct mds_body *body;
+ struct mds_export_data *med;
+ struct mds_file_data *mfd;
+ struct dentry *de;
struct file *file;
struct vfsmount *mnt;
- struct mds_obd *mds = &req->rq_obd->u.mds;
- struct mds_client_info *mci;
__u32 flags;
struct list_head *tmp;
- struct mds_file_data *mfd;
int rc, size = sizeof(*body);
ENTRY;
- 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");
+ if (OBD_FAIL_CHECK(OBD_FAIL_MDS_OPEN_PACK)) {
+ CERROR("test case OBD_FAIL_MDS_OPEN_PACK\n");
req->rq_status = -ENOMEM;
- RETURN(0);
+ RETURN(-ENOMEM);
}
- mci = mds_uuid_to_mci(mds, ptlrpc_req_to_uuid(req));
- if (!mci) {
- CERROR("mds: no mci!\n");
- req->rq_status = -ENOTCONN;
- RETURN(0);
+ rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
+ if (rc) {
+ CERROR("mds: pack error: rc = %d\n", rc);
+ req->rq_status = rc;
+ RETURN(rc);
}
body = lustre_msg_buf(req->rq_reqmsg, 0);
- /* was this animal open already? */
- /* XXX we chould only check on re-open, or do a refcount... */
- list_for_each(tmp, &mci->mci_open_head) {
- struct mds_file_data *fd;
- fd = list_entry(tmp, struct mds_file_data, mfd_list);
- if (body->extra == fd->mfd_clientfd &&
- body->fid1.id == fd->mfd_file->f_dentry->d_inode->i_ino) {
- CERROR("Re opening %Ld\n", body->fid1.id);
- RETURN(0);
+ /* was this animal open already and the client lost the reply? */
+ /* XXX need some way to detect a reopen, to avoid locked list walks */
+ med = &req->rq_export->exp_mds_data;
+ spin_lock(&med->med_open_lock);
+ list_for_each(tmp, &med->med_open_head) {
+ mfd = list_entry(tmp, typeof(*mfd), mfd_list);
+ if (!memcmp(&mfd->mfd_clienthandle, &body->handle,
+ sizeof(mfd->mfd_clienthandle)) &&
+ body->fid1.id == mfd->mfd_file->f_dentry->d_inode->i_ino) {
+ de = mfd->mfd_file->f_dentry;
+ spin_unlock(&med->med_open_lock);
+ CERROR("Re opening "LPD64"\n", body->fid1.id);
+ GOTO(out_pack, rc = 0);
}
}
+ spin_unlock(&med->med_open_lock);
- OBD_ALLOC(mfd, sizeof(*mfd));
+ mfd = kmem_cache_alloc(mds_file_cache, GFP_KERNEL);
if (!mfd) {
CERROR("mds: out of memory\n");
req->rq_status = -ENOMEM;
}
de = mds_fid2dentry(mds, &body->fid1, &mnt);
- if (IS_ERR(de)) {
- req->rq_status = -ENOENT;
- RETURN(0);
- }
+ if (IS_ERR(de))
+ GOTO(out_free, rc = PTR_ERR(de));
/* check if this inode has seen a delayed object creation */
- if (req->rq_reqmsg->bufcount > 1) {
- void *handle;
- struct inode *inode = de->d_inode;
- //struct iattr iattr;
- struct obdo *obdo;
- int rc;
-
- obdo = lustre_msg_buf(req->rq_reqmsg, 1);
- //iattr.ia_valid = ATTR_MODE;
- //iattr.ia_mode = inode->i_mode;
-
- handle = mds_fs_start(mds, de->d_inode, MDS_FSOP_SETATTR);
- if (!handle) {
- req->rq_status = -ENOMEM;
- RETURN(0);
- }
+ if (lustre_msg_get_op_flags(req->rq_reqmsg) & MDS_OPEN_HAS_EA) {
+ struct lov_mds_md *lmm = lustre_msg_buf(req->rq_reqmsg, 1);
- /* XXX error handling */
- rc = mds_fs_set_obdo(mds, inode, handle, obdo);
- // rc = mds_fs_setattr(mds, de, handle, &iattr);
- if (!rc)
- rc = mds_update_last_rcvd(mds, handle, req);
- else {
- req->rq_status = rc;
- RETURN(0);
- }
- /* FIXME: need to return last_rcvd, last_committed */
-
- /* FIXME: keep rc intact */
- rc = mds_fs_commit(mds, de->d_inode, handle);
+ rc = mds_store_ea(mds, req, body, de, lmm);
if (rc) {
- req->rq_status = rc;
- RETURN(0);
+ l_dput(de);
+ mntput(mnt);
+ GOTO(out_free, rc);
}
}
flags = body->flags;
+ /* dentry_open does a dput(de) and mntput(mnt) on error */
file = dentry_open(de, mnt, flags & ~O_DIRECT);
- if (!file || IS_ERR(file)) {
- req->rq_status = -EINVAL;
- OBD_FREE(mfd, sizeof(*mfd));
- RETURN(0);
+ if (IS_ERR(file)) {
+ rc = PTR_ERR(file);
+ GOTO(out_free, 0);
}
file->private_data = mfd;
mfd->mfd_file = file;
- mfd->mfd_clientfd = body->extra;
- list_add(&mfd->mfd_list, &mci->mci_open_head);
+ memcpy(&mfd->mfd_clienthandle, &body->handle, sizeof(body->handle));
+ get_random_bytes(&mfd->mfd_servercookie, sizeof(mfd->mfd_servercookie));
+ spin_lock(&med->med_open_lock);
+ list_add(&mfd->mfd_list, &med->med_open_head);
+ spin_unlock(&med->med_open_lock);
+out_pack:
body = lustre_msg_buf(req->rq_repmsg, 0);
- body->extra = (__u64) (unsigned long)file;
+ mds_pack_inode2fid(&body->fid1, de->d_inode);
+ mds_pack_inode2body(body, de->d_inode);
+ body->handle.addr = (__u64)(unsigned long)mfd;
+ body->handle.cookie = mfd->mfd_servercookie;
+ CDEBUG(D_INODE, "llite file "LPX64": addr %p, cookie "LPX64"\n",
+ mfd->mfd_clienthandle.addr, mfd, mfd->mfd_servercookie);
+ RETURN(0);
+
+out_free:
+ mfd->mfd_servercookie = DEAD_HANDLE_MAGIC;
+ kmem_cache_free(mds_file_cache, mfd);
+ req->rq_status = rc;
RETURN(0);
}
-static
-int mds_close(struct ptlrpc_request *req)
+static int mds_close(struct ptlrpc_request *req)
{
- struct dentry *de;
+ struct mds_export_data *med = &req->rq_export->exp_mds_data;
struct mds_body *body;
- struct file *file;
- struct mds_obd *mds = &req->rq_obd->u.mds;
- struct vfsmount *mnt;
struct mds_file_data *mfd;
int rc;
ENTRY;
- 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(mds, &body->fid1, &mnt);
- if (IS_ERR(de)) {
- req->rq_status = -ENOENT;
- RETURN(0);
+
+ mfd = mds_handle2mfd(&body->handle);
+ if (!mfd) {
+ CERROR("no handle for file close "LPD64
+ ": addr "LPX64", cookie "LPX64"\n",
+ body->fid1.id, body->handle.addr, body->handle.cookie);
+ RETURN(-ESTALE);
}
- file = (struct file *)(unsigned long)body->extra;
- if (!file->f_dentry)
- LBUG();
- mfd = (struct mds_file_data *)file->private_data;
- list_del(&mfd->mfd_list);
- OBD_FREE(mfd, sizeof(*mfd));
+ spin_lock(&med->med_open_lock);
+ req->rq_status = mds_close_mfd(mfd, med);
+ spin_unlock(&med->med_open_lock);
- req->rq_status = filp_close(file, 0);
- l_dput(de);
- mntput(mnt);
+ if (OBD_FAIL_CHECK(OBD_FAIL_MDS_CLOSE_PACK)) {
+ CERROR("test case OBD_FAIL_MDS_CLOSE_PACK\n");
+ req->rq_status = -ENOMEM;
+ RETURN(-ENOMEM);
+ }
+
+ rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen, &req->rq_repmsg);
+ if (rc) {
+ CERROR("mds: lustre_pack_msg: rc = %d\n", rc);
+ req->rq_status = rc;
+ }
RETURN(0);
}
-static int mds_readpage(struct mds_obd *mds, struct ptlrpc_request *req)
+static int mds_readpage(struct ptlrpc_request *req)
{
+ struct mds_obd *mds = mds_req2mds(req);
struct vfsmount *mnt;
struct dentry *de;
struct file *file;
- struct mds_body *body;
+ struct mds_body *body, *repbody;
struct obd_run_ctxt saved;
int rc, size = sizeof(*body);
+ struct obd_ucred uc;
ENTRY;
rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
}
body = lustre_msg_buf(req->rq_reqmsg, 0);
- push_ctxt(&saved, &mds->mds_ctxt);
+ uc.ouc_fsuid = body->fsuid;
+ uc.ouc_fsgid = body->fsgid;
+ push_ctxt(&saved, &mds->mds_ctxt, &uc);
de = mds_fid2dentry(mds, &body->fid1, &mnt);
if (IS_ERR(de))
GOTO(out_pop, rc = PTR_ERR(de));
if (IS_ERR(file))
GOTO(out_pop, rc = PTR_ERR(file));
+ repbody = lustre_msg_buf(req->rq_repmsg, 0);
+ repbody->size = file->f_dentry->d_inode->i_size;
+ repbody->valid = OBD_MD_FLSIZE;
+
/* 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 */
+ /* note: in case of an error, dentry_open puts dentry */
rc = mds_sendpage(req, file, body->size);
filp_close(file, 0);
return rc;
}
-int mds_handle(struct obd_device *dev, struct ptlrpc_service *svc,
- struct ptlrpc_request *req)
+int mds_handle(struct ptlrpc_request *req)
{
- struct mds_obd *mds = NULL;
int rc;
ENTRY;
GOTO(out, rc);
}
- if (req->rq_reqmsg->type != PTL_RPC_MSG_REQUEST) {
- CERROR("lustre_mds: wrong packet type sent %d\n",
- req->rq_reqmsg->type);
- GOTO(out, rc = -EINVAL);
- }
+ if (req->rq_reqmsg->opc != MDS_CONNECT && req->rq_export == NULL)
+ GOTO(out, rc = -ENOTCONN);
- if (req->rq_reqmsg->opc != MDS_CONNECT) {
- int id = req->rq_reqmsg->target_id;
- struct obd_device *obddev;
- if (id < 0 || id > MAX_OBD_DEVICES)
- GOTO(out, rc = -ENODEV);
- obddev = &obd_dev[id];
- if (strcmp(obddev->obd_type->typ_name, "mds") != 0)
- GOTO(out, rc = -EINVAL);
- mds = &obddev->u.mds;
- req->rq_obd = obddev;
- }
+ LASSERT(!strcmp(req->rq_obd->obd_type->typ_name, LUSTRE_MDT_NAME));
switch (req->rq_reqmsg->opc) {
case MDS_CONNECT:
CDEBUG(D_INODE, "connect\n");
OBD_FAIL_RETURN(OBD_FAIL_MDS_CONNECT_NET, 0);
- rc = mds_connect(req, &mds);
+ rc = target_handle_connect(req);
break;
case MDS_DISCONNECT:
CDEBUG(D_INODE, "disconnect\n");
OBD_FAIL_RETURN(OBD_FAIL_MDS_DISCONNECT_NET, 0);
- rc = mds_disconnect(mds, req);
- break;
+ rc = target_handle_disconnect(req);
+ goto out;
case MDS_GETSTATUS:
CDEBUG(D_INODE, "getstatus\n");
OBD_FAIL_RETURN(OBD_FAIL_MDS_GETSTATUS_NET, 0);
- rc = mds_getstatus(mds, req);
+ rc = mds_getstatus(req);
+ break;
+
+ case MDS_GETLOVINFO:
+ CDEBUG(D_INODE, "getlovinfo\n");
+ rc = mds_getlovinfo(req);
break;
case MDS_GETATTR:
case MDS_READPAGE:
CDEBUG(D_INODE, "readpage\n");
OBD_FAIL_RETURN(OBD_FAIL_MDS_READPAGE_NET, 0);
- rc = mds_readpage(mds, req);
+ rc = mds_readpage(req);
if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE))
return 0;
rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen,
&req->rq_repmsg);
if (rc) {
- rc = req->rq_status = -ENOMEM;
+ req->rq_status = rc;
break;
}
rc = mds_reint(0, req);
OBD_FAIL_RETURN(OBD_FAIL_MDS_REINT_NET_REP, 0);
break;
- }
+ }
case MDS_OPEN:
CDEBUG(D_INODE, "open\n");
rc = mds_close(req);
break;
+ case LDLM_ENQUEUE:
+ CDEBUG(D_INODE, "enqueue\n");
+ OBD_FAIL_RETURN(OBD_FAIL_LDLM_ENQUEUE, 0);
+ rc = ldlm_handle_enqueue(req);
+ if (rc)
+ break;
+ RETURN(0);
+ case LDLM_CONVERT:
+ CDEBUG(D_INODE, "convert\n");
+ OBD_FAIL_RETURN(OBD_FAIL_LDLM_CONVERT, 0);
+ rc = ldlm_handle_convert(req);
+ if (rc)
+ break;
+ RETURN(0);
+ case LDLM_BL_CALLBACK:
+ case LDLM_CP_CALLBACK:
+ CDEBUG(D_INODE, "callback\n");
+ CERROR("callbacks should not happen on MDS\n");
+ LBUG();
+ OBD_FAIL_RETURN(OBD_FAIL_LDLM_BL_CALLBACK, 0);
+ break;
default:
- rc = ptlrpc_error(svc, req);
+ rc = ptlrpc_error(req->rq_svc, req);
RETURN(rc);
}
EXIT;
-out:
- /* Still not 100% sure whether we should reply with the server
- * last_rcvd or that of this client. I'm not sure it even makes
- * a difference on a per-client basis, because last_rcvd is global
- * and we are not supposed to allow transactions while in recovery.
- */
- if (rc) {
- ptlrpc_error(svc, req);
- } else {
- req->rq_repmsg->last_rcvd = HTON__u64(mds->mds_last_rcvd);
+
+ if (!rc) {
+ struct mds_export_data *med = &req->rq_export->exp_mds_data;
+ struct mds_obd *mds = mds_req2mds(req);
+
+ req->rq_repmsg->last_xid =
+ HTON__u64(le64_to_cpu(med->med_mcd->mcd_last_xid));
req->rq_repmsg->last_committed =
HTON__u64(mds->mds_last_committed);
- CDEBUG(D_INFO, "last_rcvd %Lu, last_committed %Lu, xid %d\n",
+ CDEBUG(D_INFO, "last_rcvd ~%Lu, last_committed %Lu, xid %d\n",
(unsigned long long)mds->mds_last_rcvd,
(unsigned long long)mds->mds_last_committed,
cpu_to_le32(req->rq_xid));
+ }
+ out:
+ if (rc) {
+ CERROR("mds: processing error (opcode %d): %d\n",
+ req->rq_reqmsg->opc, rc);
+ ptlrpc_error(req->rq_svc, req);
+ } else {
CDEBUG(D_NET, "sending reply\n");
- ptlrpc_reply(svc, req);
+ ptlrpc_reply(req->rq_svc, req);
}
return 0;
}
* also the last_rcvd value to disk. If we don't have a clean shutdown,
* then the server last_rcvd value may be less than that of the clients.
* This will alert us that we may need to do client recovery.
+ *
+ * Assumes we are already in the server filesystem context.
+ *
+ * Also assumes for mds_last_rcvd that we are not modifying it (no locking).
*/
static
int mds_update_server_data(struct mds_obd *mds)
{
- struct obd_run_ctxt saved;
struct mds_server_data *msd = mds->mds_server_data;
struct file *filp = mds->mds_rcvd_filp;
loff_t off = 0;
CDEBUG(D_SUPER, "MDS mount_count is %Lu, last_rcvd is %Lu\n",
(unsigned long long)mds->mds_mount_count,
(unsigned long long)mds->mds_last_rcvd);
- push_ctxt(&saved, &mds->mds_ctxt);
rc = lustre_fwrite(filp, (char *)msd, sizeof(*msd), &off);
if (rc != sizeof(*msd)) {
CERROR("error writing MDS server data: rc = %d\n", rc);
RETURN(-EIO);
RETURN(rc);
}
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
rc = fsync_dev(filp->f_dentry->d_inode->i_rdev);
- pop_ctxt(&saved);
+#else
+ rc = file_fsync(filp, filp->f_dentry, 1);
+#endif
if (rc)
CERROR("error flushing MDS server data: rc = %d\n", rc);
static int mds_recover(struct obd_device *obddev)
{
struct mds_obd *mds = &obddev->u.mds;
+ struct obd_run_ctxt saved;
int rc;
/* This happens at the end when recovery is complete */
++mds->mds_mount_count;
+ push_ctxt(&saved, &mds->mds_ctxt, NULL);
rc = mds_update_server_data(mds);
+ pop_ctxt(&saved);
return rc;
}
-
/* mount the file system (secretly) */
static int mds_setup(struct obd_device *obddev, obd_count len, void *buf)
{
GOTO(err_kfree, rc);
}
+ CERROR("%s: mnt is %p\n", data->ioc_inlbuf1, mnt);
mds->mds_sb = mnt->mnt_root->d_inode->i_sb;
if (!mds->mds_sb)
GOTO(err_put, rc = -ENODEV);
- rc = mds_fs_setup(mds, mnt);
+ spin_lock_init(&mds->mds_last_lock);
+ mds->mds_max_mdsize = sizeof(struct lov_mds_md);
+ rc = mds_fs_setup(obddev, mnt);
if (rc) {
CERROR("MDS filesystem method init failed: rc = %d\n", rc);
GOTO(err_put, rc);
}
- mds->mds_service = ptlrpc_init_svc(64 * 1024, MDS_REQUEST_PORTAL,
- MDC_REPLY_PORTAL, "self",mds_handle);
- if (!mds->mds_service) {
- CERROR("failed to start service\n");
- GOTO(err_fs, rc = -EINVAL);
- }
-
- rc = ptlrpc_start_thread(obddev, mds->mds_service, "lustre_mds");
- if (rc) {
- CERROR("cannot start thread: rc = %d\n", rc);
- GOTO(err_svc, rc);
- }
-
- rc = -ENOENT;
- mds->mds_ldlm_conn = ptlrpc_uuid_to_connection("self");
- if (!mds->mds_ldlm_conn) {
- mds_cleanup(obddev);
- GOTO(err_thread, rc);
- }
-
obddev->obd_namespace =
ldlm_namespace_new("mds_server", LDLM_NAMESPACE_SERVER);
if (obddev->obd_namespace == NULL) {
- LBUG();
mds_cleanup(obddev);
- GOTO(err_thread, rc);
+ GOTO(err_fs, rc = -ENOMEM);
}
- mds->mds_local_namespace =
- ldlm_namespace_new("mds_client", LDLM_NAMESPACE_CLIENT);
- if (mds->mds_local_namespace == NULL) {
- LBUG();
- mds_cleanup(obddev);
- GOTO(err_thread, rc);
- }
-
- OBD_ALLOC(mds->mds_ldlm_client, sizeof(*mds->mds_ldlm_client));
- if (mds->mds_ldlm_client == NULL) {
- LBUG();
- mds_cleanup(obddev);
- GOTO(err_thread, rc);
- }
- ptlrpc_init_client(NULL, NULL, LDLM_REQUEST_PORTAL, LDLM_REPLY_PORTAL,
- mds->mds_ldlm_client);
- mds->mds_ldlm_client->cli_target_devno = obddev->obd_minor;
- mds->mds_ldlm_client->cli_name = "mds ldlm";
rc = mds_recover(obddev);
if (rc)
- GOTO(err_thread, rc);
+ GOTO(err_fs, rc);
+
+ ptlrpc_init_client(LDLM_REQUEST_PORTAL, LDLM_REPLY_PORTAL,
+ "mds_ldlm_client", &obddev->obd_ldlm_client);
RETURN(0);
-err_thread:
- ptlrpc_stop_all_threads(mds->mds_service);
-err_svc:
- ptlrpc_unregister_service(mds->mds_service);
err_fs:
- mds_fs_cleanup(mds);
+ mds_fs_cleanup(obddev);
err_put:
unlock_kernel();
mntput(mds->mds_vfsmnt);
kfree(mds->mds_fstype);
err_dec:
MOD_DEC_USE_COUNT;
- return rc;
+ RETURN(rc);
}
-static int mds_cleanup(struct obd_device * obddev)
+static int mds_cleanup(struct obd_device *obddev)
{
struct super_block *sb;
struct mds_obd *mds = &obddev->u.mds;
-
+ struct obd_run_ctxt saved;
ENTRY;
- if ( !list_empty(&obddev->obd_gen_clients) ) {
- CERROR("still has clients!\n");
- RETURN(-EBUSY);
- }
-
- ptlrpc_stop_all_threads(mds->mds_service);
- ptlrpc_unregister_service(mds->mds_service);
-
sb = mds->mds_sb;
if (!mds->mds_sb)
RETURN(0);
+ push_ctxt(&saved, &mds->mds_ctxt, NULL);
mds_update_server_data(mds);
if (mds->mds_rcvd_filp) {
if (rc)
CERROR("last_rcvd file won't close, rc=%d\n", rc);
}
+ pop_ctxt(&saved);
unlock_kernel();
mntput(mds->mds_vfsmnt);
mds->mds_sb = 0;
kfree(mds->mds_fstype);
- ldlm_namespace_free(mds->mds_local_namespace);
ldlm_namespace_free(obddev->obd_namespace);
- if (mds->mds_ldlm_conn != NULL)
- ptlrpc_put_connection(mds->mds_ldlm_conn);
-
- OBD_FREE(mds->mds_ldlm_client, sizeof(*mds->mds_ldlm_client));
-
lock_kernel();
#ifdef CONFIG_DEV_RDONLY
dev_clear_rdonly(2);
#endif
- mds_fs_cleanup(mds);
+ mds_fs_cleanup(obddev);
+
+ MOD_DEC_USE_COUNT;
+ RETURN(0);
+}
+
+static int ldlm_intent_policy(struct ldlm_lock *lock, void *req_cookie,
+ ldlm_mode_t mode, int flags, void *data)
+{
+ struct ptlrpc_request *req = req_cookie;
+ int rc = 0;
+ ENTRY;
+
+ if (!req_cookie)
+ RETURN(0);
+
+ if (req->rq_reqmsg->bufcount > 1) {
+ /* an intent needs to be considered */
+ struct ldlm_intent *it = lustre_msg_buf(req->rq_reqmsg, 1);
+ struct mds_obd *mds= &req->rq_export->exp_obd->u.mds;
+ struct mds_body *mds_rep;
+ struct ldlm_reply *rep;
+ __u64 new_resid[3] = {0, 0, 0}, old_res;
+ int rc, size[3] = {sizeof(struct ldlm_reply),
+ sizeof(struct mds_body),
+ mds->mds_max_mdsize};
+
+ it->opc = NTOH__u64(it->opc);
+
+ LDLM_DEBUG(lock, "intent policy, opc: %s",
+ ldlm_it2str(it->opc));
+
+ rc = lustre_pack_msg(3, size, NULL, &req->rq_replen,
+ &req->rq_repmsg);
+ if (rc) {
+ rc = req->rq_status = -ENOMEM;
+ RETURN(rc);
+ }
+
+ rep = lustre_msg_buf(req->rq_repmsg, 0);
+ rep->lock_policy_res1 = 1;
+
+ /* execute policy */
+ switch ((long)it->opc) {
+ case IT_CREAT|IT_OPEN:
+ rc = mds_reint(2, req);
+ if (rc || (req->rq_status != 0 &&
+ req->rq_status != -EEXIST)) {
+ rep->lock_policy_res2 = req->rq_status;
+ RETURN(ELDLM_LOCK_ABORTED);
+ }
+ break;
+ case IT_CREAT:
+ case IT_MKDIR:
+ case IT_MKNOD:
+ case IT_RENAME2:
+ case IT_LINK2:
+ case IT_RMDIR:
+ case IT_SYMLINK:
+ case IT_UNLINK:
+ rc = mds_reint(2, req);
+ if (rc || (req->rq_status != 0 &&
+ req->rq_status != -EISDIR &&
+ req->rq_status != -ENOTDIR)) {
+ rep->lock_policy_res2 = req->rq_status;
+ RETURN(ELDLM_LOCK_ABORTED);
+ }
+ break;
+ case IT_GETATTR:
+ case IT_LOOKUP:
+ case IT_OPEN:
+ case IT_READDIR:
+ case IT_READLINK:
+ case IT_RENAME:
+ case IT_LINK:
+ case IT_SETATTR:
+ rc = mds_getattr_name(2, req);
+ /* FIXME: we need to sit down and decide on who should
+ * set req->rq_status, who should return negative and
+ * positive return values, and what they all mean. */
+ if (rc || req->rq_status != 0) {
+ rep->lock_policy_res2 = req->rq_status;
+ RETURN(ELDLM_LOCK_ABORTED);
+ }
+ break;
+ case IT_READDIR|IT_OPEN:
+ LBUG();
+ break;
+ default:
+ CERROR("Unhandled intent\n");
+ LBUG();
+ }
+
+ /* We don't bother returning a lock to the client for a file
+ * or directory we are removing.
+ *
+ * As for link and rename, there is no reason for the client
+ * to get a lock on the target at this point. If they are
+ * going to modify the file/directory later they will get a
+ * lock at that time.
+ */
+ if (it->opc & (IT_UNLINK | IT_RMDIR | IT_LINK | IT_LINK2 |
+ IT_RENAME | IT_RENAME2))
+ RETURN(ELDLM_LOCK_ABORTED);
+
+ rep->lock_policy_res2 = req->rq_status;
+ mds_rep = lustre_msg_buf(req->rq_repmsg, 1);
+
+ /* If the client is about to open a file that doesn't have an MD
+ * stripe record, it's going to need a write lock. */
+ if (it->opc & IT_OPEN) {
+ struct lov_mds_md *lmm =
+ lustre_msg_buf(req->rq_repmsg, 2);
+ if (lmm->lmm_easize == 0) {
+ LDLM_DEBUG(lock, "open with no EA; returning PW"
+ " lock");
+ lock->l_req_mode = LCK_PW;
+ }
+ }
+
+ if (flags & LDLM_FL_INTENT_ONLY) {
+ LDLM_DEBUG(lock, "INTENT_ONLY, aborting lock");
+ RETURN(ELDLM_LOCK_ABORTED);
+ }
+ /* Give the client a lock on the child object, instead of the
+ * parent that it requested. */
+ new_resid[0] = NTOH__u32(mds_rep->ino);
+ new_resid[1] = NTOH__u32(mds_rep->generation);
+ if (new_resid[0] == 0)
+ LBUG();
+ old_res = lock->l_resource->lr_name[0];
+
+ ldlm_lock_change_resource(lock, new_resid);
+ if (lock->l_resource == NULL) {
+ LBUG();
+ RETURN(-ENOMEM);
+ }
+ LDLM_DEBUG(lock, "intent policy, old res %ld",
+ (long)old_res);
+ RETURN(ELDLM_LOCK_CHANGED);
+ } else {
+ int size = sizeof(struct ldlm_reply);
+ rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen,
+ &req->rq_repmsg);
+ if (rc) {
+ LBUG();
+ RETURN(-ENOMEM);
+ }
+ }
+ RETURN(rc);
+}
+
+int mds_attach(struct obd_device *dev,
+ obd_count len, void *data)
+{
+ int rc;
+ rc = lprocfs_reg_obd(dev, (lprocfs_vars_t*)status_var_nm_1, (void*)dev);
+ return rc;
+}
+
+int mds_detach(struct obd_device *dev)
+{
+ int rc;
+ rc = lprocfs_dereg_obd(dev);
+ return rc;
+
+}
+
+#define MDT_NUM_THREADS 8
+static int mdt_setup(struct obd_device *obddev, obd_count len, void *buf)
+{
+ int i;
+ // struct obd_ioctl_data* data = buf;
+ struct mds_obd *mds = &obddev->u.mds;
+ int rc = 0;
+ ENTRY;
+
+ MOD_INC_USE_COUNT;
+
+ mds->mds_service = ptlrpc_init_svc(MDS_NEVENTS, MDS_NBUFS,
+ MDS_BUFSIZE, MDS_MAXREQSIZE,
+ MDS_REQUEST_PORTAL, MDC_REPLY_PORTAL,
+ "self", mds_handle, "mds");
+ if (!mds->mds_service) {
+ CERROR("failed to start service\n");
+ GOTO(err_dec, rc = -EINVAL);
+ }
+
+ for (i = 0; i < MDT_NUM_THREADS; i++) {
+ char name[32];
+ sprintf(name, "lustre_MDT_%02d", i);
+ rc = ptlrpc_start_thread(obddev, mds->mds_service, name);
+ if (rc) {
+ CERROR("cannot start MDT thread #%d: rc %d\n", i, rc);
+ GOTO(err_thread, rc);
+ }
+ }
+
+ RETURN(0);
+
+err_thread:
+ ptlrpc_stop_all_threads(mds->mds_service);
+ ptlrpc_unregister_service(mds->mds_service);
+err_dec:
+ MOD_DEC_USE_COUNT;
+ RETURN(rc);
+}
+
+
+static int mdt_cleanup(struct obd_device *obddev)
+{
+ struct mds_obd *mds = &obddev->u.mds;
+ ENTRY;
+
+ ptlrpc_stop_all_threads(mds->mds_service);
+ ptlrpc_unregister_service(mds->mds_service);
MOD_DEC_USE_COUNT;
RETURN(0);
}
+extern int mds_iocontrol(long cmd, struct lustre_handle *conn,
+ int len, void *karg, void *uarg);
+
/* use obd ops to offer management infrastructure */
static struct obd_ops mds_obd_ops = {
+ o_attach: mds_attach,
+ o_detach: mds_detach,
+ o_connect: mds_connect,
+ o_disconnect: mds_disconnect,
o_setup: mds_setup,
o_cleanup: mds_cleanup,
+ o_iocontrol: mds_iocontrol
};
+static struct obd_ops mdt_obd_ops = {
+ o_setup: mdt_setup,
+ o_cleanup: mdt_cleanup,
+};
+
+
static int __init mds_init(void)
{
- inter_module_register("mds_reint", THIS_MODULE, &mds_reint);
- inter_module_register("mds_getattr_name", THIS_MODULE,
- &mds_getattr_name);
- obd_register_type(&mds_obd_ops, LUSTRE_MDS_NAME);
+
+ mds_file_cache = kmem_cache_create("ll_mds_file_data",
+ sizeof(struct mds_file_data),
+ 0, 0, NULL, NULL);
+ if (mds_file_cache == NULL)
+ return -ENOMEM;
+
+ class_register_type(&mds_obd_ops, (lprocfs_vars_t*)status_class_var,
+ LUSTRE_MDS_NAME);
+ class_register_type(&mdt_obd_ops, 0, LUSTRE_MDT_NAME);
+
+ ldlm_register_intent(ldlm_intent_policy);
+
return 0;
+
}
static void __exit mds_exit(void)
{
- inter_module_unregister("mds_reint");
- inter_module_unregister("mds_getattr_name");
- obd_unregister_type(LUSTRE_MDS_NAME);
+
+
+ ldlm_unregister_intent();
+ class_unregister_type(LUSTRE_MDS_NAME);
+ class_unregister_type(LUSTRE_MDT_NAME);
+ if (kmem_cache_destroy(mds_file_cache))
+ CERROR("couldn't free MDS file cache\n");
+
}
MODULE_AUTHOR("Cluster File Systems <info@clusterfs.com>");
git://git.whamcloud.com / fs / lustre-release.git / blobdiff