* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*/
/*
RETURN(rc);
}
-int mdt_version_get_check(struct mdt_thread_info *info, int index)
+/**
+ * Get version of object by fid.
+ *
+ * Return real version or ENOENT_VERSION if object doesn't exist
+ */
+static void mdt_obj_version_get(struct mdt_thread_info *info,
+ struct mdt_object *o, __u64 *version)
+{
+ LASSERT(o);
+ LASSERT(mdt_object_exists(o) >= 0);
+ if (mdt_object_exists(o) > 0)
+ *version = mo_version_get(info->mti_env, mdt_object_child(o));
+ else
+ *version = ENOENT_VERSION;
+ CDEBUG(D_INODE, "FID "DFID" version is "LPX64"\n",
+ PFID(mdt_object_fid(o)), *version);
+}
+
+/**
+ * Check version is correct.
+ *
+ * Should be called only during replay.
+ */
+static int mdt_version_check(struct ptlrpc_request *req,
+ __u64 version, int idx)
{
- /** version recovery */
- struct md_object *mo;
- struct ptlrpc_request *req = mdt_info_req(info);
- __u64 curr_version, *pre_versions;
+ __u64 *pre_ver = lustre_msg_get_versions(req->rq_reqmsg);
ENTRY;
if (!exp_connect_vbr(req->rq_export))
RETURN(0);
- LASSERT(info->mti_mos[index]);
- if (mdt_object_exists(info->mti_mos[index]) == 0)
- RETURN(-ESTALE);
- mo = mdt_object_child(info->mti_mos[index]);
-
- curr_version = mo_version_get(info->mti_env, mo);
- CDEBUG(D_INODE, "Version is "LPX64"\n", curr_version);
+ LASSERT(req_is_replay(req));
/** VBR: version is checked always because costs nothing */
- if (lustre_msg_get_transno(req->rq_reqmsg) != 0) {
- pre_versions = lustre_msg_get_versions(req->rq_reqmsg);
- LASSERT(index < PTLRPC_NUM_VERSIONS);
- /** Sanity check for malformed buffers */
- if (pre_versions == NULL) {
- CERROR("No versions in request buffer\n");
- cfs_spin_lock(&req->rq_export->exp_lock);
- req->rq_export->exp_vbr_failed = 1;
- cfs_spin_unlock(&req->rq_export->exp_lock);
- RETURN(-EOVERFLOW);
- } else if (pre_versions[index] != curr_version) {
- CDEBUG(D_INODE, "Version mismatch "LPX64" != "LPX64"\n",
- pre_versions[index], curr_version);
- cfs_spin_lock(&req->rq_export->exp_lock);
- req->rq_export->exp_vbr_failed = 1;
- cfs_spin_unlock(&req->rq_export->exp_lock);
- RETURN(-EOVERFLOW);
- }
+ LASSERT(idx < PTLRPC_NUM_VERSIONS);
+ /** Sanity check for malformed buffers */
+ if (pre_ver == NULL) {
+ CERROR("No versions in request buffer\n");
+ cfs_spin_lock(&req->rq_export->exp_lock);
+ req->rq_export->exp_vbr_failed = 1;
+ cfs_spin_unlock(&req->rq_export->exp_lock);
+ RETURN(-EOVERFLOW);
+ } else if (pre_ver[idx] != version) {
+ CDEBUG(D_INODE, "Version mismatch "LPX64" != "LPX64"\n",
+ pre_ver[idx], version);
+ cfs_spin_lock(&req->rq_export->exp_lock);
+ req->rq_export->exp_vbr_failed = 1;
+ cfs_spin_unlock(&req->rq_export->exp_lock);
+ RETURN(-EOVERFLOW);
}
- /** save pre-versions in reply */
- LASSERT(req->rq_repmsg != NULL);
- pre_versions = lustre_msg_get_versions(req->rq_repmsg);
- if (pre_versions)
- pre_versions[index] = curr_version;
RETURN(0);
}
+/**
+ * Save pre-versions in reply.
+ */
+static void mdt_version_save(struct ptlrpc_request *req, __u64 version,
+ int idx)
+{
+ __u64 *reply_ver;
+
+ if (!exp_connect_vbr(req->rq_export))
+ return;
+
+ LASSERT(!req_is_replay(req));
+ LASSERT(req->rq_repmsg != NULL);
+ reply_ver = lustre_msg_get_versions(req->rq_repmsg);
+ if (reply_ver)
+ reply_ver[idx] = version;
+}
+
+/**
+ * Save enoent version, it is needed when it is obvious that object doesn't
+ * exist, e.g. child during create.
+ */
+static void mdt_enoent_version_save(struct mdt_thread_info *info, int idx)
+{
+ /* save version of file name for replay, it must be ENOENT here */
+ if (!req_is_replay(mdt_info_req(info))) {
+ info->mti_ver[idx] = ENOENT_VERSION;
+ mdt_version_save(mdt_info_req(info), info->mti_ver[idx], idx);
+ }
+}
+
+/**
+ * Get version from disk and save in reply buffer.
+ *
+ * Versions are saved in reply only during normal operations not replays.
+ */
+void mdt_version_get_save(struct mdt_thread_info *info,
+ struct mdt_object *mto, int idx)
+{
+ /* don't save versions during replay */
+ if (!req_is_replay(mdt_info_req(info))) {
+ mdt_obj_version_get(info, mto, &info->mti_ver[idx]);
+ mdt_version_save(mdt_info_req(info), info->mti_ver[idx], idx);
+ }
+}
+
+/**
+ * Get version from disk and check it, no save in reply.
+ */
+int mdt_version_get_check(struct mdt_thread_info *info,
+ struct mdt_object *mto, int idx)
+{
+ /* only check versions during replay */
+ if (!req_is_replay(mdt_info_req(info)))
+ return 0;
+
+ mdt_obj_version_get(info, mto, &info->mti_ver[idx]);
+ return mdt_version_check(mdt_info_req(info), info->mti_ver[idx], idx);
+}
+
+/**
+ * Get version from disk and check if recovery or just save.
+ */
+int mdt_version_get_check_save(struct mdt_thread_info *info,
+ struct mdt_object *mto, int idx)
+{
+ int rc = 0;
+
+ mdt_obj_version_get(info, mto, &info->mti_ver[idx]);
+ if (req_is_replay(mdt_info_req(info)))
+ rc = mdt_version_check(mdt_info_req(info), info->mti_ver[idx],
+ idx);
+ else
+ mdt_version_save(mdt_info_req(info), info->mti_ver[idx], idx);
+ return rc;
+}
+
+/**
+ * Lookup with version checking.
+ *
+ * This checks version of 'name'. Many reint functions uses 'name' for child not
+ * FID, therefore we need to get object by name and check its version.
+ */
+int mdt_lookup_version_check(struct mdt_thread_info *info,
+ struct mdt_object *p, struct lu_name *lname,
+ struct lu_fid *fid, int idx)
+{
+ int rc, vbrc;
+
+ rc = mdo_lookup(info->mti_env, mdt_object_child(p), lname, fid,
+ &info->mti_spec);
+ /* Check version only during replay */
+ if (!req_is_replay(mdt_info_req(info)))
+ return rc;
+
+ info->mti_ver[idx] = ENOENT_VERSION;
+ if (rc == 0) {
+ struct mdt_object *child;
+ child = mdt_object_find(info->mti_env, info->mti_mdt, fid);
+ if (likely(!IS_ERR(child))) {
+ mdt_obj_version_get(info, child, &info->mti_ver[idx]);
+ mdt_object_put(info->mti_env, child);
+ }
+ }
+ vbrc = mdt_version_check(mdt_info_req(info), info->mti_ver[idx], idx);
+ return vbrc ? vbrc : rc;
+
+}
+
+/*
+ * VBR: we save three versions in reply:
+ * 0 - parent. Check that parent version is the same during replay.
+ * 1 - name. Version of 'name' if file exists with the same name or
+ * ENOENT_VERSION, it is needed because file may appear due to missed replays.
+ * 2 - child. Version of child by FID. Must be ENOENT. It is mostly sanity
+ * check.
+ */
static int mdt_md_create(struct mdt_thread_info *info)
{
struct mdt_device *mdt = info->mti_mdt;
if (IS_ERR(parent))
RETURN(PTR_ERR(parent));
+ rc = mdt_version_get_check_save(info, parent, 0);
+ if (rc)
+ GOTO(out_put_parent, rc);
+
+ /*
+ * Check child name version during replay.
+ * During create replay a file may exist with same name.
+ */
+ lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen);
+ rc = mdt_lookup_version_check(info, parent, lname,
+ &info->mti_tmp_fid1, 1);
+ /* -ENOENT is expected here */
+ if (rc != 0 && rc != -ENOENT)
+ GOTO(out_put_parent, rc);
+
+ /* save version of file name for replay, it must be ENOENT here */
+ mdt_enoent_version_save(info, 1);
+
child = mdt_object_find(info->mti_env, mdt, rr->rr_fid2);
if (likely(!IS_ERR(child))) {
struct md_object *next = mdt_object_child(parent);
mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
OBD_FAIL_MDS_REINT_CREATE_WRITE);
- info->mti_mos[0] = parent;
- info->mti_mos[1] = child;
- rc = mdt_version_get_check(info, 0);
+ /* Version of child will be updated on disk. */
+ info->mti_mos = child;
+ rc = mdt_version_get_check_save(info, child, 2);
if (rc)
GOTO(out_put_child, rc);
info->mti_spec.sp_cr_lookup = 1;
info->mti_spec.sp_feat = &dt_directory_features;
- lname = mdt_name(info->mti_env, (char *)rr->rr_name,
- rr->rr_namelen);
rc = mdo_create(info->mti_env, next, lname,
mdt_object_child(child),
&info->mti_spec, ma);
}
out_put_child:
mdt_object_put(info->mti_env, child);
- } else
+ } else {
rc = PTR_ERR(child);
-
+ }
mdt_create_pack_capa(info, rc, child, repbody);
+out_put_parent:
mdt_object_unlock_put(info, parent, lh, rc);
RETURN(rc);
}
/* VBR: update version if attr changed are important for recovery */
if (do_vbr) {
- info->mti_mos[0] = mo;
- rc = mdt_version_get_check(info, 0);
+ /* update on-disk version of changed object */
+ info->mti_mos = mo;
+ rc = mdt_version_get_check_save(info, mo, 0);
if (rc)
GOTO(out_unlock, rc);
}
/* Close the found mfd, update attributes. */
ma->ma_lmm_size = info->mti_mdt->mdt_max_mdsize;
- OBD_ALLOC(ma->ma_lmm, ma->ma_lmm_size);
+ OBD_ALLOC(ma->ma_lmm, info->mti_mdt->mdt_max_mdsize);
if (ma->ma_lmm == NULL)
GOTO(out_put, rc = -ENOMEM);
mdt_mfd_close(info, mfd);
- OBD_FREE(ma->ma_lmm, ma->ma_lmm_size);
+ OBD_FREE(ma->ma_lmm, info->mti_mdt->mdt_max_mdsize);
} else {
rc = mdt_attr_set(info, mo, ma, rr->rr_flags);
if (rc)
RETURN(rc);
}
+/*
+ * VBR: save parent version in reply and child version getting by its name.
+ * Version of child is getting and checking during its lookup. If
+ */
static int mdt_reint_unlink(struct mdt_thread_info *info,
struct mdt_lock_handle *lhc)
{
GOTO(out, rc);
}
- info->mti_mos[0] = mp;
- rc = mdt_version_get_check(info, 0);
+ rc = mdt_version_get_check_save(info, mp, 0);
if (rc)
GOTO(out_unlock_parent, rc);
/* step 2: find & lock the child */
lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen);
- rc = mdo_lookup(info->mti_env, mdt_object_child(mp),
- lname, child_fid, &info->mti_spec);
+ /* lookup child object along with version checking */
+ rc = mdt_lookup_version_check(info, mp, lname, child_fid, 1);
if (rc != 0)
GOTO(out_unlock_parent, rc);
mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
OBD_FAIL_MDS_REINT_UNLINK_WRITE);
-
- info->mti_mos[1] = mc;
- rc = mdt_version_get_check(info, 1);
- if (rc)
- GOTO(out_unlock_child, rc);
-
+ /* save version when object is locked */
+ mdt_version_get_save(info, mc, 1);
/*
* Now we can only make sure we need MA_INODE, in mdd layer, will check
* whether need MA_LOV and MA_COOKIE.
mdt_handle_last_unlink(info, mc, ma);
EXIT;
-out_unlock_child:
+
mdt_object_unlock_put(info, mc, child_lh, rc);
out_unlock_parent:
mdt_object_unlock_put(info, mp, parent_lh, rc);
return rc;
}
+/*
+ * VBR: save versions in reply: 0 - parent; 1 - child by fid; 2 - target by
+ * name.
+ */
static int mdt_reint_link(struct mdt_thread_info *info,
struct mdt_lock_handle *lhc)
{
if (IS_ERR(mp))
RETURN(PTR_ERR(mp));
- info->mti_mos[0] = mp;
- rc = mdt_version_get_check(info, 0);
+ rc = mdt_version_get_check_save(info, mp, 0);
if (rc)
GOTO(out_unlock_parent, rc);
mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
OBD_FAIL_MDS_REINT_LINK_WRITE);
- info->mti_mos[1] = ms;
- rc = mdt_version_get_check(info, 1);
+ info->mti_mos = ms;
+ rc = mdt_version_get_check_save(info, ms, 1);
if (rc)
GOTO(out_unlock_child, rc);
lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen);
+ /** check target version by name during replay */
+ rc = mdt_lookup_version_check(info, mp, lname, &info->mti_tmp_fid1, 2);
+ if (rc != 0 && rc != -ENOENT)
+ GOTO(out_unlock_child, rc);
+ /* save version of file name for replay, it must be ENOENT here */
+ if (!req_is_replay(mdt_info_req(info))) {
+ info->mti_ver[2] = ENOENT_VERSION;
+ mdt_version_save(mdt_info_req(info), info->mti_ver[2], 2);
+ }
+
rc = mdo_link(info->mti_env, mdt_object_child(mp),
mdt_object_child(ms), lname, ma);
RETURN(rc);
}
+/*
+ * VBR: rename versions in reply: 0 - src parent; 1 - tgt parent;
+ * 2 - src child; 3 - tgt child.
+ * Update on disk version of src child.
+ */
static int mdt_reint_rename(struct mdt_thread_info *info,
struct mdt_lock_handle *lhc)
{
ENTRY;
if (info->mti_dlm_req)
- ldlm_request_cancel(mdt_info_req(info), info->mti_dlm_req, 0);
+ ldlm_request_cancel(req, info->mti_dlm_req, 0);
if (info->mti_cross_ref) {
rc = mdt_reint_rename_tgt(info);
if (IS_ERR(msrcdir))
GOTO(out_rename_lock, rc = PTR_ERR(msrcdir));
- info->mti_mos[0] = msrcdir;
- rc = mdt_version_get_check(info, 0);
+ rc = mdt_version_get_check_save(info, msrcdir, 0);
if (rc)
GOTO(out_unlock_source, rc);
if (IS_ERR(mtgtdir))
GOTO(out_unlock_source, rc = PTR_ERR(mtgtdir));
+ /* check early, the real version will be saved after locking */
+ rc = mdt_version_get_check(info, mtgtdir, 1);
+ if (rc)
+ GOTO(out_put_target, rc);
+
rc = mdt_object_exists(mtgtdir);
- if (rc == 0)
- GOTO(out_unlock_target, rc = -ESTALE);
- else if (rc > 0) {
+ if (rc == 0) {
+ GOTO(out_put_target, rc = -ESTALE);
+ } else if (rc > 0) {
/* we lock the target dir if it is local */
rc = mdt_object_lock(info, mtgtdir, lh_tgtdirp,
MDS_INODELOCK_UPDATE,
MDT_LOCAL_LOCK);
- if (rc != 0) {
- mdt_object_put(info->mti_env, mtgtdir);
- GOTO(out_unlock_source, rc);
- }
-
- info->mti_mos[1] = mtgtdir;
- rc = mdt_version_get_check(info, 1);
- if (rc)
- GOTO(out_unlock_target, rc);
+ if (rc != 0)
+ GOTO(out_put_target, rc);
+ /* get and save correct version after locking */
+ mdt_version_get_save(info, mtgtdir, 1);
}
}
/* step 3: find & lock the old object. */
lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen);
mdt_name_copy(&slname, lname);
- rc = mdo_lookup(info->mti_env, mdt_object_child(msrcdir),
- &slname, old_fid, &info->mti_spec);
+ rc = mdt_lookup_version_check(info, msrcdir, &slname, old_fid, 2);
if (rc != 0)
GOTO(out_unlock_target, rc);
GOTO(out_unlock_target, rc);
}
- info->mti_mos[2] = mold;
- rc = mdt_version_get_check(info, 2);
- if (rc)
- GOTO(out_unlock_old, rc);
-
+ info->mti_mos = mold;
+ /* save version after locking */
+ mdt_version_get_save(info, mold, 2);
mdt_set_capainfo(info, 2, old_fid, BYPASS_CAPA);
/* step 4: find & lock the new object. */
/* new target object may not exist now */
lname = mdt_name(info->mti_env, (char *)rr->rr_tgt, rr->rr_tgtlen);
- rc = mdo_lookup(info->mti_env, mdt_object_child(mtgtdir),
- lname, new_fid, &info->mti_spec);
+ /* lookup with version checking */
+ rc = mdt_lookup_version_check(info, mtgtdir, lname, new_fid, 3);
if (rc == 0) {
/* the new_fid should have been filled at this moment */
if (lu_fid_eq(old_fid, new_fid))
mdt_object_put(info->mti_env, mnew);
GOTO(out_unlock_old, rc);
}
-
- info->mti_mos[3] = mnew;
- rc = mdt_version_get_check(info, 3);
- if (rc)
- GOTO(out_unlock_new, rc);
-
+ /* get and save version after locking */
+ mdt_version_get_save(info, mnew, 3);
mdt_set_capainfo(info, 3, new_fid, BYPASS_CAPA);
- } else if (rc != -EREMOTE && rc != -ENOENT)
+ } else if (rc != -EREMOTE && rc != -ENOENT) {
GOTO(out_unlock_old, rc);
+ } else {
+ mdt_enoent_version_save(info, 3);
+ }
/* step 5: rename it */
mdt_reint_init_ma(info, ma);
out_unlock_old:
mdt_object_unlock_put(info, mold, lh_oldp, rc);
out_unlock_target:
- mdt_object_unlock_put(info, mtgtdir, lh_tgtdirp, rc);
+ mdt_object_unlock(info, mtgtdir, lh_tgtdirp, rc);
+out_put_target:
+ mdt_object_put(info->mti_env, mtgtdir);
out_unlock_source:
mdt_object_unlock_put(info, msrcdir, lh_srcdirp, rc);
out_rename_lock:
git://git.whamcloud.com / fs / lustre-release.git / blobdiff