-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2016, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*/
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
#define DEBUG_SUBSYSTEM S_LMV
-#ifdef __KERNEL__
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/pagemap.h>
-#include <asm/div64.h>
+#include <linux/math64.h>
#include <linux/seq_file.h>
#include <linux/namei.h>
-# ifndef HAVE_VFS_INTENT_PATCHES
-# include <linux/lustre_intent.h>
-# endif
-#else
-#include <liblustre.h>
-#endif
+#include <lustre_intent.h>
#include <obd_support.h>
-#include <lustre/lustre_idl.h>
#include <lustre_lib.h>
#include <lustre_net.h>
#include <lustre_dlm.h>
+#include <lustre_mdc.h>
#include <obd_class.h>
#include <lprocfs_status.h>
#include "lmv_internal.h"
-int lmv_intent_remote(struct obd_export *exp, void *lmm,
- int lmmsize, struct lookup_intent *it,
- int flags, struct ptlrpc_request **reqp,
- ldlm_blocking_callback cb_blocking,
- int extra_lock_flags)
+static int lmv_intent_remote(struct obd_export *exp, struct lookup_intent *it,
+ const struct lu_fid *parent_fid,
+ struct ptlrpc_request **reqp,
+ ldlm_blocking_callback cb_blocking,
+ __u64 extra_lock_flags)
{
- struct obd_device *obd = exp->exp_obd;
- struct lmv_obd *lmv = &obd->u.lmv;
- struct ptlrpc_request *req = NULL;
- struct lustre_handle plock;
- struct md_op_data *op_data;
- struct lmv_tgt_desc *tgt;
- struct mdt_body *body;
- int pmode;
- int rc = 0;
- ENTRY;
-
- body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
- if (body == NULL)
- RETURN(-EPROTO);
-
- /*
- * Not cross-ref case, just get out of here.
- */
- if (!(body->valid & OBD_MD_MDS))
- RETURN(0);
-
- /*
- * Unfortunately, we have to lie to MDC/MDS to retrieve
- * attributes llite needs and provideproper locking.
- */
- if (it->it_op & IT_LOOKUP)
- it->it_op = IT_GETATTR;
-
- /*
- * We got LOOKUP lock, but we really need attrs.
- */
- pmode = it->d.lustre.it_lock_mode;
- if (pmode) {
- plock.cookie = it->d.lustre.it_lock_handle;
- it->d.lustre.it_lock_mode = 0;
- it->d.lustre.it_data = NULL;
- }
-
- LASSERT(fid_is_sane(&body->fid1));
-
- tgt = lmv_find_target(lmv, &body->fid1);
- if (IS_ERR(tgt))
- GOTO(out, rc = PTR_ERR(tgt));
-
- OBD_ALLOC_PTR(op_data);
- if (op_data == NULL)
- GOTO(out, rc = -ENOMEM);
-
- op_data->op_fid1 = body->fid1;
- op_data->op_bias = MDS_CROSS_REF;
-
- CDEBUG(D_INODE,
- "REMOTE_INTENT with fid="DFID" -> mds #%d\n",
- PFID(&body->fid1), tgt->ltd_idx);
-
- it->d.lustre.it_disposition &= ~DISP_ENQ_COMPLETE;
- rc = md_intent_lock(tgt->ltd_exp, op_data, lmm, lmmsize, it,
- flags, &req, cb_blocking, extra_lock_flags);
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct ptlrpc_request *req = NULL;
+ struct lustre_handle plock;
+ struct md_op_data *op_data;
+ struct lmv_tgt_desc *tgt;
+ struct mdt_body *body;
+ int pmode;
+ int rc = 0;
+ ENTRY;
+
+ body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
+ if (body == NULL)
+ RETURN(-EPROTO);
+
+ LASSERT((body->mbo_valid & OBD_MD_MDS));
+
+ /*
+ * Unfortunately, we have to lie to MDC/MDS to retrieve
+ * attributes llite needs and provideproper locking.
+ */
+ if (it->it_op & IT_LOOKUP)
+ it->it_op = IT_GETATTR;
+
+ /*
+ * We got LOOKUP lock, but we really need attrs.
+ */
+ pmode = it->it_lock_mode;
+ if (pmode) {
+ plock.cookie = it->it_lock_handle;
+ it->it_lock_mode = 0;
+ it->it_request = NULL;
+ }
+
+ LASSERT(fid_is_sane(&body->mbo_fid1));
+
+ tgt = lmv_find_target(lmv, &body->mbo_fid1);
+ if (IS_ERR(tgt))
+ GOTO(out, rc = PTR_ERR(tgt));
+
+ OBD_ALLOC_PTR(op_data);
+ if (op_data == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ op_data->op_fid1 = body->mbo_fid1;
+ /* Sent the parent FID to the remote MDT */
+ if (parent_fid != NULL) {
+ /* The parent fid is only for remote open to
+ * check whether the open is from OBF,
+ * see mdt_cross_open */
+ LASSERT(it->it_op & IT_OPEN);
+ op_data->op_fid2 = *parent_fid;
+ }
+
+ op_data->op_bias = MDS_CROSS_REF;
+ CDEBUG(D_INODE, "REMOTE_INTENT with fid="DFID" -> mds #%u\n",
+ PFID(&body->mbo_fid1), tgt->ltd_idx);
+
+ rc = md_intent_lock(tgt->ltd_exp, op_data, it, &req, cb_blocking,
+ extra_lock_flags);
if (rc)
GOTO(out_free_op_data, rc);
- /*
- * LLite needs LOOKUP lock to track dentry revocation in order to
- * maintain dcache consistency. Thus drop UPDATE lock here and put
- * LOOKUP in request.
- */
- if (it->d.lustre.it_lock_mode != 0) {
- ldlm_lock_decref((void *)&it->d.lustre.it_lock_handle,
- it->d.lustre.it_lock_mode);
- it->d.lustre.it_lock_mode = 0;
- }
- it->d.lustre.it_lock_handle = plock.cookie;
- it->d.lustre.it_lock_mode = pmode;
-
- EXIT;
+ /*
+ * LLite needs LOOKUP lock to track dentry revocation in order to
+ * maintain dcache consistency. Thus drop UPDATE|PERM lock here
+ * and put LOOKUP in request.
+ */
+ if (it->it_lock_mode != 0) {
+ it->it_remote_lock_handle =
+ it->it_lock_handle;
+ it->it_remote_lock_mode = it->it_lock_mode;
+ }
+
+ if (pmode) {
+ it->it_lock_handle = plock.cookie;
+ it->it_lock_mode = pmode;
+ }
+
+ EXIT;
out_free_op_data:
- OBD_FREE_PTR(op_data);
+ OBD_FREE_PTR(op_data);
out:
- if (rc && pmode)
- ldlm_lock_decref(&plock, pmode);
+ if (rc && pmode)
+ ldlm_lock_decref(&plock, pmode);
- ptlrpc_req_finished(*reqp);
- *reqp = req;
- return rc;
+ ptlrpc_req_finished(*reqp);
+ *reqp = req;
+ return rc;
}
+int lmv_revalidate_slaves(struct obd_export *exp,
+ const struct lmv_stripe_md *lsm,
+ ldlm_blocking_callback cb_blocking,
+ int extra_lock_flags)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct ptlrpc_request *req = NULL;
+ struct mdt_body *body;
+ struct md_op_data *op_data;
+ int i;
+ int rc = 0;
+
+ ENTRY;
+
+ /**
+ * revalidate slaves has some problems, temporarily return,
+ * we may not need that
+ */
+ OBD_ALLOC_PTR(op_data);
+ if (op_data == NULL)
+ RETURN(-ENOMEM);
+
+ /**
+ * Loop over the stripe information, check validity and update them
+ * from MDS if needed.
+ */
+ for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
+ struct lu_fid fid;
+ struct lookup_intent it = { .it_op = IT_GETATTR };
+ struct lustre_handle *lockh = NULL;
+ struct lmv_tgt_desc *tgt = NULL;
+ struct inode *inode;
+
+ fid = lsm->lsm_md_oinfo[i].lmo_fid;
+ inode = lsm->lsm_md_oinfo[i].lmo_root;
+
+ /*
+ * Prepare op_data for revalidating. Note that @fid2 shluld be
+ * defined otherwise it will go to server and take new lock
+ * which is not needed here.
+ */
+ memset(op_data, 0, sizeof(*op_data));
+ op_data->op_fid1 = fid;
+ op_data->op_fid2 = fid;
+
+ tgt = lmv_get_target(lmv, lsm->lsm_md_oinfo[i].lmo_mds, NULL);
+ if (IS_ERR(tgt))
+ GOTO(cleanup, rc = PTR_ERR(tgt));
+
+ CDEBUG(D_INODE, "Revalidate slave "DFID" -> mds #%u\n",
+ PFID(&fid), tgt->ltd_idx);
+
+ if (req != NULL) {
+ ptlrpc_req_finished(req);
+ req = NULL;
+ }
+
+ rc = md_intent_lock(tgt->ltd_exp, op_data, &it, &req,
+ cb_blocking, extra_lock_flags);
+ if (rc < 0)
+ GOTO(cleanup, rc);
+
+ lockh = (struct lustre_handle *)&it.it_lock_handle;
+ if (rc > 0 && req == NULL) {
+ /* slave inode is still valid */
+ CDEBUG(D_INODE, "slave "DFID" is still valid.\n",
+ PFID(&fid));
+ rc = 0;
+ } else {
+ /* refresh slave from server */
+ body = req_capsule_server_get(&req->rq_pill,
+ &RMF_MDT_BODY);
+ if (body == NULL) {
+ if (it.it_lock_mode && lockh) {
+ ldlm_lock_decref(lockh,
+ it.it_lock_mode);
+ it.it_lock_mode = 0;
+ }
+ GOTO(cleanup, rc = -ENOENT);
+ }
+
+ i_size_write(inode, body->mbo_size);
+ inode->i_blocks = body->mbo_blocks;
+ set_nlink(inode, body->mbo_nlink);
+ inode->i_atime.tv_sec = body->mbo_atime;
+ inode->i_ctime.tv_sec = body->mbo_ctime;
+ inode->i_mtime.tv_sec = body->mbo_mtime;
+ }
+
+ md_set_lock_data(tgt->ltd_exp, lockh, inode, NULL);
+ if (it.it_lock_mode != 0 && lockh != NULL) {
+ ldlm_lock_decref(lockh, it.it_lock_mode);
+ it.it_lock_mode = 0;
+ }
+ }
+
+cleanup:
+ if (req != NULL)
+ ptlrpc_req_finished(req);
+
+ OBD_FREE_PTR(op_data);
+ RETURN(rc);
+}
+
+
/*
* IT_OPEN is intended to open (and create, possible) an object. Parent (pid)
* may be split dir.
*/
-int lmv_intent_open(struct obd_export *exp, struct md_op_data *op_data,
- void *lmm, int lmmsize, struct lookup_intent *it,
- int flags, struct ptlrpc_request **reqp,
- ldlm_blocking_callback cb_blocking,
- int extra_lock_flags)
+static int lmv_intent_open(struct obd_export *exp, struct md_op_data *op_data,
+ struct lookup_intent *it,
+ struct ptlrpc_request **reqp,
+ ldlm_blocking_callback cb_blocking,
+ __u64 extra_lock_flags)
{
- struct obd_device *obd = exp->exp_obd;
- struct lu_fid rpid = op_data->op_fid1;
- struct lmv_obd *lmv = &obd->u.lmv;
- struct md_op_data *sop_data;
- struct lmv_stripe_md *mea;
- struct lmv_tgt_desc *tgt;
- struct mdt_body *body;
- struct lmv_object *obj;
- int rc;
- int loop = 0;
- int sidx;
- ENTRY;
-
- OBD_ALLOC_PTR(sop_data);
- if (sop_data == NULL)
- RETURN(-ENOMEM);
-
- /* save op_data fro repeat case */
- *sop_data = *op_data;
-
-repeat:
-
- ++loop;
- LASSERT(loop <= 2);
- obj = lmv_object_find(obd, &rpid);
- if (obj) {
- /*
- * Directory is already split, so we have to forward request to
- * the right MDS.
- */
- sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
- (char *)op_data->op_name,
- op_data->op_namelen);
-
- rpid = obj->lo_stripes[sidx].ls_fid;
-
- sop_data->op_mds = obj->lo_stripes[sidx].ls_mds;
- tgt = lmv_get_target(lmv, sop_data->op_mds);
- sop_data->op_bias &= ~MDS_CHECK_SPLIT;
- lmv_object_put(obj);
-
- CDEBUG(D_INODE,
- "Choose slave dir ("DFID") -> mds #%d\n",
- PFID(&rpid), tgt->ltd_idx);
- } else {
- sop_data->op_bias |= MDS_CHECK_SPLIT;
- tgt = lmv_find_target(lmv, &rpid);
- sop_data->op_mds = tgt->ltd_idx;
- }
- if (IS_ERR(tgt))
- GOTO(out_free_sop_data, rc = PTR_ERR(tgt));
-
- sop_data->op_fid1 = rpid;
-
- if (it->it_op & IT_CREAT) {
- /*
- * For open with IT_CREATE and for IT_CREATE cases allocate new
- * fid and setup FLD for it.
- */
- sop_data->op_fid3 = sop_data->op_fid2;
- rc = lmv_fid_alloc(exp, &sop_data->op_fid2, sop_data);
- if (rc)
- GOTO(out_free_sop_data, rc);
-
- if (rc == -ERESTART)
- goto repeat;
- else if (rc)
- GOTO(out_free_sop_data, rc);
- }
-
- CDEBUG(D_INODE,
- "OPEN_INTENT with fid1="DFID", fid2="DFID", name='%s' -> mds #%d\n",
- PFID(&sop_data->op_fid1), PFID(&sop_data->op_fid2),
- sop_data->op_name, tgt->ltd_idx);
-
- rc = md_intent_lock(tgt->ltd_exp, sop_data, lmm, lmmsize, it, flags,
- reqp, cb_blocking, extra_lock_flags);
-
- if (rc == -ERESTART) {
- LASSERT(*reqp != NULL);
- DEBUG_REQ(D_WARNING|D_RPCTRACE, *reqp,
- "Got -ERESTART during open!\n");
- ptlrpc_req_finished(*reqp);
- *reqp = NULL;
- it->d.lustre.it_data = NULL;
-
- /*
- * Directory got split. Time to update local object and repeat
- * the request with proper MDS.
- */
- LASSERT(lu_fid_eq(&op_data->op_fid1, &rpid));
- rc = lmv_handle_split(exp, &rpid);
- if (rc == 0) {
- /* We should reallocate child FID. */
- rc = lmv_allocate_slaves(obd, &rpid, op_data,
- &sop_data->op_fid2);
- if (rc == 0)
- goto repeat;
- }
- }
-
- if (rc != 0)
- GOTO(out_free_sop_data, rc);
-
- /*
- * Nothing is found, do not access body->fid1 as it is zero and thus
- * pointless.
- */
- if ((it->d.lustre.it_disposition & DISP_LOOKUP_NEG) &&
- !(it->d.lustre.it_disposition & DISP_OPEN_CREATE) &&
- !(it->d.lustre.it_disposition & DISP_OPEN_OPEN))
- GOTO(out_free_sop_data, rc = 0);
-
- /*
- * Okay, MDS has returned success. Probably name has been resolved in
- * remote inode.
- */
- rc = lmv_intent_remote(exp, lmm, lmmsize, it, flags, reqp,
- cb_blocking, extra_lock_flags);
- if (rc != 0) {
- LASSERT(rc < 0);
- /*
- * This is possible, that some userspace application will try to
- * open file as directory and we will have -ENOTDIR here. As
- * this is normal situation, we should not print error here,
- * only debug info.
- */
- CDEBUG(D_INODE, "Can't handle remote %s: dir "DFID"("DFID"):"
- "%*s: %d\n", LL_IT2STR(it), PFID(&op_data->op_fid2),
- PFID(&rpid), op_data->op_namelen, op_data->op_name, rc);
- GOTO(out_free_sop_data, rc);
- }
-
- /*
- * Caller may use attrs MDS returns on IT_OPEN lock request so, we have
- * to update them for split dir.
- */
- body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
- LASSERT(body != NULL);
-
- /*
- * Could not find object, FID is not present in response.
- */
- if (!(body->valid & OBD_MD_FLID))
- GOTO(out_free_sop_data, rc = 0);
-
- obj = lmv_object_find(obd, &body->fid1);
- if (obj == NULL) {
- /*
- * XXX: Capability for remote call!
- */
- mea = lmv_get_mea(*reqp);
- if (mea != NULL) {
- obj = lmv_object_create(exp, &body->fid1, mea);
- if (IS_ERR(obj))
- GOTO(out_free_sop_data, rc = (int)PTR_ERR(obj));
- }
- }
-
- if (obj) {
- /*
- * This is split dir and we'd want to get attrs.
- */
- CDEBUG(D_INODE, "Slave attributes for "DFID"\n",
- PFID(&body->fid1));
-
- rc = lmv_revalidate_slaves(exp, reqp, &body->fid1, it, 1,
- cb_blocking, extra_lock_flags);
- lmv_object_put(obj);
- }
- EXIT;
-out_free_sop_data:
- OBD_FREE_PTR(sop_data);
- return rc;
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct lmv_tgt_desc *tgt;
+ struct mdt_body *body;
+ __u64 flags = it->it_flags;
+ int rc;
+
+ ENTRY;
+
+ if ((it->it_op & IT_CREAT) && !(flags & MDS_OPEN_BY_FID)) {
+ /* don't allow create under dir with bad hash */
+ if (lmv_is_dir_bad_hash(op_data->op_mea1))
+ RETURN(-EBADF);
+
+ if (lmv_is_dir_migrating(op_data->op_mea1)) {
+ if (flags & O_EXCL) {
+ /*
+ * open(O_CREAT | O_EXCL) needs to check
+ * existing name, which should be done on both
+ * old and new layout, to avoid creating new
+ * file under old layout, check old layout on
+ * client side.
+ */
+ tgt = lmv_locate_tgt(lmv, op_data,
+ &op_data->op_fid1);
+ if (IS_ERR(tgt))
+ RETURN(PTR_ERR(tgt));
+
+ rc = md_getattr_name(tgt->ltd_exp, op_data,
+ reqp);
+ if (!rc) {
+ ptlrpc_req_finished(*reqp);
+ *reqp = NULL;
+ RETURN(-EEXIST);
+ }
+
+ if (rc != -ENOENT)
+ RETURN(rc);
+
+ op_data->op_post_migrate = true;
+ } else {
+ /*
+ * open(O_CREAT) will be sent to MDT in old
+ * layout first, to avoid creating new file
+ * under old layout, clear O_CREAT.
+ */
+ it->it_flags &= ~O_CREAT;
+ }
+ }
+ }
+
+retry:
+ if (it->it_flags & MDS_OPEN_BY_FID) {
+ LASSERT(fid_is_sane(&op_data->op_fid2));
+
+ /* for striped directory, we can't know parent stripe fid
+ * without name, but we can set it to child fid, and MDT
+ * will obtain it from linkea in open in such case. */
+ if (op_data->op_mea1 != NULL)
+ op_data->op_fid1 = op_data->op_fid2;
+
+ tgt = lmv_find_target(lmv, &op_data->op_fid2);
+ if (IS_ERR(tgt))
+ RETURN(PTR_ERR(tgt));
+
+ op_data->op_mds = tgt->ltd_idx;
+ } else {
+ LASSERT(fid_is_sane(&op_data->op_fid1));
+ LASSERT(fid_is_zero(&op_data->op_fid2));
+ LASSERT(op_data->op_name != NULL);
+
+ tgt = lmv_locate_tgt(lmv, op_data, &op_data->op_fid1);
+ if (IS_ERR(tgt))
+ RETURN(PTR_ERR(tgt));
+ }
+
+ /* If it is ready to open the file by FID, do not need
+ * allocate FID at all, otherwise it will confuse MDT */
+ if ((it->it_op & IT_CREAT) && !(it->it_flags & MDS_OPEN_BY_FID)) {
+ /*
+ * For lookup(IT_CREATE) cases allocate new fid and setup FLD
+ * for it.
+ */
+ rc = lmv_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
+ if (rc != 0)
+ RETURN(rc);
+ }
+
+ CDEBUG(D_INODE, "OPEN_INTENT with fid1="DFID", fid2="DFID","
+ " name='%s' -> mds #%u\n", PFID(&op_data->op_fid1),
+ PFID(&op_data->op_fid2), op_data->op_name, tgt->ltd_idx);
+
+ rc = md_intent_lock(tgt->ltd_exp, op_data, it, reqp, cb_blocking,
+ extra_lock_flags);
+ if (rc != 0)
+ RETURN(rc);
+ /*
+ * Nothing is found, do not access body->fid1 as it is zero and thus
+ * pointless.
+ */
+ if ((it->it_disposition & DISP_LOOKUP_NEG) &&
+ !(it->it_disposition & DISP_OPEN_CREATE) &&
+ !(it->it_disposition & DISP_OPEN_OPEN)) {
+ if (!(it->it_flags & MDS_OPEN_BY_FID) &&
+ lmv_dir_retry_check_update(op_data)) {
+ ptlrpc_req_finished(*reqp);
+ it->it_request = NULL;
+ it->it_disposition = 0;
+ *reqp = NULL;
+
+ it->it_flags = flags;
+ fid_zero(&op_data->op_fid2);
+ goto retry;
+ }
+
+ RETURN(rc);
+ }
+
+ body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
+ if (body == NULL)
+ RETURN(-EPROTO);
+
+ /* Not cross-ref case, just get out of here. */
+ if (unlikely((body->mbo_valid & OBD_MD_MDS))) {
+ rc = lmv_intent_remote(exp, it, &op_data->op_fid1, reqp,
+ cb_blocking, extra_lock_flags);
+ if (rc != 0)
+ RETURN(rc);
+
+ body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
+ if (body == NULL)
+ RETURN(-EPROTO);
+ }
+
+ RETURN(rc);
}
/*
* Handler for: getattr, lookup and revalidate cases.
*/
-int lmv_intent_lookup(struct obd_export *exp, struct md_op_data *op_data,
- void *lmm, int lmmsize, struct lookup_intent *it,
- int flags, struct ptlrpc_request **reqp,
- ldlm_blocking_callback cb_blocking,
- int extra_lock_flags)
+static int
+lmv_intent_lookup(struct obd_export *exp, struct md_op_data *op_data,
+ struct lookup_intent *it, struct ptlrpc_request **reqp,
+ ldlm_blocking_callback cb_blocking,
+ __u64 extra_lock_flags)
{
- struct obd_device *obd = exp->exp_obd;
- struct lu_fid rpid = op_data->op_fid1;
- struct lmv_obd *lmv = &obd->u.lmv;
- struct lmv_object *obj = NULL;
- struct md_op_data *sop_data;
- struct lmv_stripe_md *mea;
- struct lmv_tgt_desc *tgt = NULL;
- struct mdt_body *body;
- int sidx;
- int loop = 0;
- int rc = 0;
- ENTRY;
-
- OBD_ALLOC_PTR(sop_data);
- if (sop_data == NULL)
- RETURN(-ENOMEM);
-
- *sop_data = *op_data;
-
-repeat:
- ++loop;
- LASSERT(loop <= 2);
-
- obj = lmv_object_find(obd, &op_data->op_fid1);
- if (obj && op_data->op_namelen) {
- sidx = raw_name2idx(obj->lo_hashtype,
- obj->lo_objcount,
- (char *)op_data->op_name,
- op_data->op_namelen);
- rpid = obj->lo_stripes[sidx].ls_fid;
- tgt = lmv_get_target(lmv,
- obj->lo_stripes[sidx].ls_mds);
- CDEBUG(D_INODE,
- "Choose slave dir ("DFID") -> mds #%d\n",
- PFID(&rpid), tgt->ltd_idx);
- sop_data->op_bias &= ~MDS_CHECK_SPLIT;
- } else {
- tgt = lmv_find_target(lmv, &op_data->op_fid1);
- sop_data->op_bias |= MDS_CHECK_SPLIT;
- }
- if (obj)
- lmv_object_put(obj);
-
- if (IS_ERR(tgt))
- GOTO(out_free_sop_data, rc = PTR_ERR(tgt));
-
- if (!fid_is_sane(&sop_data->op_fid2))
- fid_zero(&sop_data->op_fid2);
-
- CDEBUG(D_INODE,
- "LOOKUP_INTENT with fid1="DFID", fid2="DFID
- ", name='%s' -> mds #%d\n",
- PFID(&sop_data->op_fid1), PFID(&sop_data->op_fid2),
- sop_data->op_name ? sop_data->op_name : "<NULL>",
- tgt->ltd_idx);
-
- sop_data->op_bias &= ~MDS_CROSS_REF;
- sop_data->op_fid1 = rpid;
-
- rc = md_intent_lock(tgt->ltd_exp, sop_data, lmm, lmmsize, it,
- flags, reqp, cb_blocking, extra_lock_flags);
-
- if (rc == -ERESTART) {
- LASSERT(*reqp != NULL);
- DEBUG_REQ(D_WARNING|D_RPCTRACE, *reqp,
- "Got -ERESTART during lookup!\n");
- ptlrpc_req_finished(*reqp);
- *reqp = NULL;
- it->d.lustre.it_data = 0;
-
- /*
- * Directory got split since last update. This shouldn't be
- * because splitting causes lock revocation, so revalidate had
- * to fail and lookup on dir had to return mea.
- */
- LASSERT(obj == NULL);
-
- obj = lmv_object_create(exp, &rpid, NULL);
- if (IS_ERR(obj))
- GOTO(out_free_sop_data, rc = PTR_ERR(obj));
- lmv_object_put(obj);
- goto repeat;
- }
-
- if (rc < 0)
- GOTO(out_free_sop_data, rc);
-
- if (obj && rc > 0) {
- /*
- * This is split dir. In order to optimize things a bit, we
- * consider obj valid updating missing parts.
- */
- CDEBUG(D_INODE,
- "Revalidate slaves for "DFID", rc %d\n",
- PFID(&op_data->op_fid1), rc);
-
- LASSERT(fid_is_sane(&op_data->op_fid2));
- rc = lmv_revalidate_slaves(exp, reqp, &op_data->op_fid1, it, rc,
- cb_blocking, extra_lock_flags);
- GOTO(out_free_sop_data, rc);
- }
-
- if (*reqp == NULL)
- GOTO(out_free_sop_data, rc);
-
- /*
- * MDS has returned success. Probably name has been resolved in
- * remote inode. Let's check this.
- */
- rc = lmv_intent_remote(exp, lmm, lmmsize, it, flags,
- reqp, cb_blocking, extra_lock_flags);
- if (rc < 0)
- GOTO(out_free_sop_data, rc);
-
- /*
- * Nothing is found, do not access body->fid1 as it is zero and thus
- * pointless.
- */
- if (it->d.lustre.it_disposition & DISP_LOOKUP_NEG)
- GOTO(out_free_sop_data, rc = 0);
-
- LASSERT(*reqp != NULL);
- LASSERT((*reqp)->rq_repmsg != NULL);
- body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
- LASSERT(body != NULL);
-
- /*
- * Could not find object, FID is not present in response.
- */
- if (!(body->valid & OBD_MD_FLID))
- GOTO(out_free_sop_data, rc = 0);
-
- obj = lmv_object_find(obd, &body->fid1);
- if (obj == NULL) {
- /*
- * XXX: Remote capability is not handled.
- */
- mea = lmv_get_mea(*reqp);
- if (mea != NULL) {
- obj = lmv_object_create(exp, &body->fid1, mea);
- if (IS_ERR(obj))
- GOTO(out_free_sop_data, rc = (int)PTR_ERR(obj));
- }
- } else {
- CDEBUG(D_INODE, "Slave attributes for "DFID", rc %d\n",
- PFID(&body->fid1), rc);
-
- rc = lmv_revalidate_slaves(exp, reqp, &body->fid1, it, 1,
- cb_blocking, extra_lock_flags);
- lmv_object_put(obj);
- }
-
- EXIT;
-out_free_sop_data:
- OBD_FREE_PTR(sop_data);
- return rc;
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct lmv_tgt_desc *tgt = NULL;
+ struct mdt_body *body;
+ int rc;
+ ENTRY;
+
+retry:
+ tgt = lmv_locate_tgt(lmv, op_data, &op_data->op_fid1);
+ if (IS_ERR(tgt))
+ RETURN(PTR_ERR(tgt));
+
+ if (!fid_is_sane(&op_data->op_fid2))
+ fid_zero(&op_data->op_fid2);
+
+ CDEBUG(D_INODE, "LOOKUP_INTENT with fid1="DFID", fid2="DFID
+ ", name='%s' -> mds #%u\n",
+ PFID(&op_data->op_fid1), PFID(&op_data->op_fid2),
+ op_data->op_name ? op_data->op_name : "<NULL>",
+ tgt->ltd_idx);
+
+ op_data->op_bias &= ~MDS_CROSS_REF;
+
+ rc = md_intent_lock(tgt->ltd_exp, op_data, it, reqp, cb_blocking,
+ extra_lock_flags);
+ if (rc < 0)
+ RETURN(rc);
+
+ if (*reqp == NULL) {
+ /* If RPC happens, lsm information will be revalidated
+ * during update_inode process (see ll_update_lsm_md) */
+ if (op_data->op_mea2 != NULL) {
+ rc = lmv_revalidate_slaves(exp, op_data->op_mea2,
+ cb_blocking,
+ extra_lock_flags);
+ if (rc != 0)
+ RETURN(rc);
+ }
+ RETURN(rc);
+ } else if (it_disposition(it, DISP_LOOKUP_NEG) &&
+ lmv_dir_retry_check_update(op_data)) {
+ ptlrpc_req_finished(*reqp);
+ it->it_request = NULL;
+ it->it_disposition = 0;
+ *reqp = NULL;
+
+ goto retry;
+ }
+
+ if (!it_has_reply_body(it))
+ RETURN(0);
+
+ /*
+ * MDS has returned success. Probably name has been resolved in
+ * remote inode. Let's check this.
+ */
+ body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
+ if (body == NULL)
+ RETURN(-EPROTO);
+
+ /* Not cross-ref case, just get out of here. */
+ if (unlikely((body->mbo_valid & OBD_MD_MDS))) {
+ rc = lmv_intent_remote(exp, it, NULL, reqp, cb_blocking,
+ extra_lock_flags);
+ if (rc != 0)
+ RETURN(rc);
+ body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
+ if (body == NULL)
+ RETURN(-EPROTO);
+ }
+
+ RETURN(rc);
}
int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
- void *lmm, int lmmsize, struct lookup_intent *it,
- int flags, struct ptlrpc_request **reqp,
- ldlm_blocking_callback cb_blocking,
- int extra_lock_flags)
-{
- struct obd_device *obd = exp->exp_obd;
- int rc;
- ENTRY;
-
- LASSERT(it != NULL);
- LASSERT(fid_is_sane(&op_data->op_fid1));
-
- CDEBUG(D_INODE, "INTENT LOCK '%s' for '%*s' on "DFID"\n",
- LL_IT2STR(it), op_data->op_namelen, op_data->op_name,
- PFID(&op_data->op_fid1));
-
- rc = lmv_check_connect(obd);
- if (rc)
- RETURN(rc);
-
- if (it->it_op & (IT_LOOKUP | IT_GETATTR))
- rc = lmv_intent_lookup(exp, op_data, lmm, lmmsize, it,
- flags, reqp, cb_blocking,
- extra_lock_flags);
- else if (it->it_op & IT_OPEN)
- rc = lmv_intent_open(exp, op_data, lmm, lmmsize, it,
- flags, reqp, cb_blocking,
- extra_lock_flags);
- else
- LBUG();
- RETURN(rc);
-}
-
-int lmv_revalidate_slaves(struct obd_export *exp, struct ptlrpc_request **reqp,
- const struct lu_fid *mid, struct lookup_intent *oit,
- int master_valid, ldlm_blocking_callback cb_blocking,
- int extra_lock_flags)
-{
- struct obd_device *obd = exp->exp_obd;
- struct lmv_obd *lmv = &obd->u.lmv;
- int master_lockm = 0;
- struct lustre_handle *lockh = NULL;
- struct ptlrpc_request *mreq = *reqp;
- struct lustre_handle master_lockh = { 0 };
- struct md_op_data *op_data;
- struct ldlm_lock *lock;
- unsigned long size = 0;
- struct mdt_body *body;
- struct lmv_object *obj;
- int i;
- int rc = 0;
- struct lu_fid fid;
- struct ptlrpc_request *req;
- ldlm_blocking_callback cb;
- struct lookup_intent it;
- struct lmv_tgt_desc *tgt;
- int master;
- ENTRY;
-
- CDEBUG(D_INODE, "Revalidate master obj "DFID"\n", PFID(mid));
-
- OBD_ALLOC_PTR(op_data);
- if (op_data == NULL)
- RETURN(-ENOMEM);
-
- /*
- * We have to loop over the subobjects, check validity and update them
- * from MDS if needed. It's very useful that we need not to update all
- * the fields. Say, common fields (that are equal on all the subojects
- * need not to be update, another fields (i_size, for example) are
- * cached all the time.
- */
- obj = lmv_object_find_lock(obd, mid);
- if (obj == NULL)
- RETURN(-EALREADY);
-
- for (i = 0; i < obj->lo_objcount; i++) {
- fid = obj->lo_stripes[i].ls_fid;
- master = lu_fid_eq(&fid, &obj->lo_fid);
- cb = master ? cb_blocking : lmv_blocking_ast;
-
- /*
- * We need i_size and we would like to check possible cached locks,
- * so this is is IT_GETATTR intent.
- */
- memset(&it, 0, sizeof(it));
- it.it_op = IT_GETATTR;
-
- if (master && master_valid) {
- /*
- * lmv_intent_lookup() already checked
- * validness and took the lock.
- */
- if (mreq != NULL) {
- body = req_capsule_server_get(&mreq->rq_pill,
- &RMF_MDT_BODY);
- LASSERT(body != NULL);
- goto update;
- }
- /*
- * Take already cached attrs into account.
- */
- CDEBUG(D_INODE,
- "Master "DFID"is locked and cached\n",
- PFID(mid));
- goto release_lock;
- }
-
- /*
- * Prepare op_data for revalidating. Note that @fid2 shuld be
- * defined otherwise it will go to server and take new lock
- * which is what we reall not need here.
- */
- memset(op_data, 0, sizeof(*op_data));
- op_data->op_bias = MDS_CROSS_REF;
- op_data->op_fid1 = fid;
- op_data->op_fid2 = fid;
- req = NULL;
-
- tgt = lmv_get_target(lmv, obj->lo_stripes[i].ls_mds);
- if (IS_ERR(tgt))
- GOTO(cleanup, rc = PTR_ERR(tgt));
-
- CDEBUG(D_INODE, "Revalidate slave obj "DFID" -> mds #%d\n",
- PFID(&fid), tgt->ltd_idx);
-
- rc = md_intent_lock(tgt->ltd_exp, op_data, NULL, 0, &it, 0,
- &req, cb, extra_lock_flags);
-
- lockh = (struct lustre_handle *)&it.d.lustre.it_lock_handle;
- if (rc > 0 && req == NULL) {
- /*
- * Nice, this slave is valid.
- */
- CDEBUG(D_INODE, "Cached slave "DFID"\n", PFID(&fid));
- goto release_lock;
- }
-
- if (rc < 0)
- GOTO(cleanup, rc);
-
- if (master) {
- /*
- * Save lock on master to be returned to the caller.
- */
- CDEBUG(D_INODE, "No lock on master "DFID" yet\n",
- PFID(mid));
- memcpy(&master_lockh, lockh, sizeof(master_lockh));
- master_lockm = it.d.lustre.it_lock_mode;
- it.d.lustre.it_lock_mode = 0;
- } else {
- /*
- * This is slave. We want to control it.
- */
- lock = ldlm_handle2lock(lockh);
- LASSERT(lock != NULL);
- lock->l_ast_data = lmv_object_get(obj);
- LDLM_LOCK_PUT(lock);
- }
-
- if (*reqp == NULL) {
- /*
- * This is first reply, we'll use it to return updated
- * data back to the caller.
- */
- LASSERT(req != NULL);
- ptlrpc_request_addref(req);
- *reqp = req;
- }
-
- body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
- LASSERT(body != NULL);
-
-update:
- obj->lo_stripes[i].ls_size = body->size;
-
- CDEBUG(D_INODE, "Fresh size %lu from "DFID"\n",
- (unsigned long)obj->lo_stripes[i].ls_size, PFID(&fid));
-
- if (req)
- ptlrpc_req_finished(req);
-release_lock:
- size += obj->lo_stripes[i].ls_size;
-
- if (it.d.lustre.it_lock_mode && lockh) {
- ldlm_lock_decref(lockh, it.d.lustre.it_lock_mode);
- it.d.lustre.it_lock_mode = 0;
- }
- }
-
- if (*reqp) {
- /*
- * Some attrs got refreshed, we have reply and it's time to put
- * fresh attrs to it.
- */
- CDEBUG(D_INODE, "Return refreshed attrs: size = %lu for "DFID"\n",
- (unsigned long)size, PFID(mid));
-
- body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
- LASSERT(body != NULL);
- body->size = size;
-
- if (mreq == NULL) {
- /*
- * Very important to maintain mds num the same because
- * of revalidation. mreq == NULL means that caller has
- * no reply and the only attr we can return is size.
- */
- body->valid = OBD_MD_FLSIZE;
- }
- if (master_valid == 0) {
- oit->d.lustre.it_lock_handle = master_lockh.cookie;
- oit->d.lustre.it_lock_mode = master_lockm;
- }
- rc = 0;
- } else {
- /*
- * It seems all the attrs are fresh and we did no request.
- */
- CDEBUG(D_INODE, "All the attrs were fresh on "DFID"\n",
- PFID(mid));
- if (master_valid == 0)
- oit->d.lustre.it_lock_mode = master_lockm;
- rc = 1;
- }
-
- EXIT;
-cleanup:
- OBD_FREE_PTR(op_data);
- lmv_object_put_unlock(obj);
- return rc;
-}
-
-int lmv_allocate_slaves(struct obd_device *obd, struct lu_fid *pid,
- struct md_op_data *op, struct lu_fid *fid)
+ struct lookup_intent *it, struct ptlrpc_request **reqp,
+ ldlm_blocking_callback cb_blocking,
+ __u64 extra_lock_flags)
{
- struct lmv_obd *lmv = &obd->u.lmv;
- struct lmv_object *obj;
- mdsno_t mds;
- int sidx;
- int rc;
- ENTRY;
-
- obj = lmv_object_find(obd, pid);
- if (obj == NULL)
- RETURN(-EALREADY);
-
- sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
- (char *)op->op_name, op->op_namelen);
- mds = obj->lo_stripes[sidx].ls_mds;
- lmv_object_put(obj);
-
- rc = __lmv_fid_alloc(lmv, fid, mds);
- if (rc) {
- CERROR("Can't allocate fid, rc %d\n", rc);
- RETURN(rc);
- }
-
- CDEBUG(D_INODE, "Allocate new fid "DFID" for slave "
- "obj -> mds #%x\n", PFID(fid), mds);
-
- RETURN(rc);
+ int rc;
+ ENTRY;
+
+ LASSERT(it != NULL);
+ LASSERT(fid_is_sane(&op_data->op_fid1));
+
+ CDEBUG(D_INODE, "INTENT LOCK '%s' for "DFID" '%.*s' on "DFID"\n",
+ LL_IT2STR(it), PFID(&op_data->op_fid2),
+ (int)op_data->op_namelen, op_data->op_name,
+ PFID(&op_data->op_fid1));
+
+ if (it->it_op & (IT_LOOKUP | IT_GETATTR | IT_LAYOUT | IT_GETXATTR))
+ rc = lmv_intent_lookup(exp, op_data, it, reqp, cb_blocking,
+ extra_lock_flags);
+ else if (it->it_op & IT_OPEN)
+ rc = lmv_intent_open(exp, op_data, it, reqp, cb_blocking,
+ extra_lock_flags);
+ else
+ LBUG();
+
+ if (rc < 0) {
+ struct lustre_handle lock_handle;
+
+ if (it->it_lock_mode != 0) {
+ lock_handle.cookie = it->it_lock_handle;
+ ldlm_lock_decref_and_cancel(&lock_handle,
+ it->it_lock_mode);
+ }
+
+ it->it_lock_handle = 0;
+ it->it_lock_mode = 0;
+
+ if (it->it_remote_lock_mode != 0) {
+ lock_handle.cookie = it->it_remote_lock_handle;
+ ldlm_lock_decref_and_cancel(&lock_handle,
+ it->it_remote_lock_mode);
+ }
+
+ it->it_remote_lock_handle = 0;
+ it->it_remote_lock_mode = 0;
+ }
+
+ RETURN(rc);
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff