* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see [sun.com URL with a
- * copy of GPLv2].
+ * 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
#include <lprocfs_status.h>
#include "lmv_internal.h"
-static inline void lmv_drop_intent_lock(struct lookup_intent *it)
-{
- 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;
- }
-}
-
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)
{
- 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 obd_export *tgt_exp;
- struct mdt_body *body;
- int pmode, rc = 0;
+ 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_DLM_REP);
- LASSERT(body != NULL);
+ 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);
/*
- * oh, MDS reports that this is remote inode case i.e. we have to ask
- * for real attrs on another MDS.
+ * Unfortunately, we have to lie to MDC/MDS to retrieve
+ * attributes llite needs and provideproper locking.
*/
- if (it->it_op & IT_LOOKUP) {
- /*
- * unfortunately, we have to lie to MDC/MDS to retrieve
- * attributes llite needs.
- */
+ if (it->it_op & IT_LOOKUP)
it->it_op = IT_GETATTR;
- }
- /* we got LOOKUP lock, but we really need attrs */
+ /*
+ * 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 = 0;
+ it->d.lustre.it_data = NULL;
}
LASSERT(fid_is_sane(&body->fid1));
- it->d.lustre.it_disposition &= ~DISP_ENQ_COMPLETE;
-
- tgt_exp = lmv_find_export(lmv, &body->fid1);
- if (IS_ERR(tgt_exp))
- GOTO(out, rc = PTR_ERR(tgt_exp));
+ 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)
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);
- rc = md_intent_lock(tgt_exp, op_data, lmm, lmmsize, it, flags,
- &req, cb_blocking, extra_lock_flags);
+ 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);
+ if (rc)
+ GOTO(out_free_op_data, rc);
/*
- * llite needs LOOKUP lock to track dentry revocation in order to
+ * 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 (rc == 0) {
- lmv_drop_intent_lock(it);
- it->d.lustre.it_lock_handle = plock.cookie;
- it->d.lustre.it_lock_mode = pmode;
+ 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;
- OBD_FREE_PTR(op_data);
EXIT;
+out_free_op_data:
+ OBD_FREE_PTR(op_data);
out:
if (rc && pmode)
ldlm_lock_decref(&plock, pmode);
return rc;
}
-int lmv_alloc_slave_fids(struct obd_device *obd, struct lu_fid *pid,
- struct md_op_data *op, struct lu_fid *fid)
-{
- struct lmv_obd *lmv = &obd->u.lmv;
- struct lmv_obj *obj;
- mdsno_t mds;
- int mea_idx;
- int rc;
- ENTRY;
-
- obj = lmv_obj_grab(obd, pid);
- if (!obj) {
- CERROR("Object "DFID" should be split\n",
- PFID(pid));
- RETURN(0);
- }
-
- mea_idx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
- (char *)op->op_name, op->op_namelen);
- mds = obj->lo_inodes[mea_idx].li_mds;
- lmv_obj_put(obj);
-
- rc = __lmv_fid_alloc(lmv, fid, mds);
- if (rc) {
- CERROR("Can't allocate new fid, rc %d\n",
- rc);
- RETURN(rc);
- }
-
- CDEBUG(D_INFO, "Allocate new fid "DFID" for split "
- "obj\n", PFID(fid));
-
- RETURN(rc);
-}
-
/*
* IT_OPEN is intended to open (and create, possible) an object. Parent (pid)
* may be split dir.
ldlm_blocking_callback cb_blocking,
int 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 obd_export *tgt_exp;
- struct lmv_stripe_md *mea;
- struct mdt_body *body;
- struct lmv_obj *obj;
- int rc, loop = 0;
+ 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);
++loop;
LASSERT(loop <= 2);
- obj = lmv_obj_grab(obd, &rpid);
+ obj = lmv_object_find(obd, &rpid);
if (obj) {
- int mea_idx;
-
/*
* Directory is already split, so we have to forward request to
* the right MDS.
*/
- mea_idx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
+ sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
(char *)op_data->op_name,
op_data->op_namelen);
- rpid = obj->lo_inodes[mea_idx].li_fid;
+ rpid = obj->lo_stripes[sidx].ls_fid;
- sop_data->op_mds = obj->lo_inodes[mea_idx].li_mds;
- tgt_exp = lmv_get_export(lmv, sop_data->op_mds);
+ 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_obj_put(obj);
- CDEBUG(D_OTHER, "Choose slave dir ("DFID")\n", PFID(&rpid));
- } else {
- struct lmv_tgt_desc *tgt;
+ 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;
- tgt_exp = tgt->ltd_exp;
}
- if (IS_ERR(tgt_exp))
- GOTO(out_free_sop_data, rc = PTR_ERR(tgt_exp));
+ if (IS_ERR(tgt))
+ GOTO(out_free_sop_data, rc = PTR_ERR(tgt));
sop_data->op_fid1 = rpid;
* For open with IT_CREATE and for IT_CREATE cases allocate new
* fid and setup FLD for it.
*/
- /* save old child fid for correctly check stale data*/
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);
}
- rc = md_intent_lock(tgt_exp, sop_data, lmm, lmmsize, it, flags,
+ 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) {
"Got -ERESTART during open!\n");
ptlrpc_req_finished(*reqp);
*reqp = NULL;
- it->d.lustre.it_data = 0;
+ it->d.lustre.it_data = NULL;
/*
* Directory got split. Time to update local object and repeat
rc = lmv_handle_split(exp, &rpid);
if (rc == 0) {
/* We should reallocate child FID. */
- rc = lmv_alloc_slave_fids(obd, &rpid, op_data,
- &sop_data->op_fid2);
+ rc = lmv_allocate_slaves(obd, &rpid, op_data,
+ &sop_data->op_fid2);
if (rc == 0)
goto repeat;
}
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.
*/
* this is normal situation, we should not print error here,
* only debug info.
*/
- CDEBUG(D_OTHER, "can't handle remote %s: dir "DFID"("DFID"):"
+ 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);
}
- /*
- * Nothing is found, do not access body->fid1 as it is zero and thus
- * pointless.
+ /*
+ * Caller may use attrs MDS returns on IT_OPEN lock request so, we have
+ * to update them for split dir.
*/
- 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);
-
- /* 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_DLM_REP);
+ body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
LASSERT(body != NULL);
-
- /* could not find object, FID is not present in response. */
+
+ /*
+ * 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_obj_grab(obd, &body->fid1);
- if (!obj && (mea = lmv_get_mea(*reqp))) {
- /* FIXME: capability for remote! */
- /* wow! this is split dir, we'd like to handle it */
- obj = lmv_obj_create(exp, &body->fid1, mea);
- if (IS_ERR(obj))
- GOTO(out_free_sop_data, rc = (int)PTR_ERR(obj));
+ 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_OTHER, "attrs from slaves for "DFID"\n",
+ /*
+ * 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);
- } else if (S_ISDIR(body->mode)) {
- CDEBUG(D_OTHER, "object "DFID" has not lmv obj?\n",
- PFID(&body->fid1));
+ lmv_object_put(obj);
}
-
- if (obj)
- lmv_obj_put(obj);
-
EXIT;
out_free_sop_data:
OBD_FREE_PTR(sop_data);
return rc;
}
-int lmv_intent_getattr(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)
+/*
+ * 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)
{
- struct lmv_obj *obj = NULL, *obj2 = NULL;
- 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 mdt_body *body;
- mdsno_t mds;
- int rc = 0;
+ 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);
- /* save op_data fro repeat case */
*sop_data = *op_data;
- if (fid_is_sane(&op_data->op_fid2)) {
- /*
- * Caller wants to revalidate attrs of obj we have to revalidate
- * slaves if requested object is split directory.
- */
- CDEBUG(D_OTHER, "revalidate attrs for "DFID"\n",
- PFID(&op_data->op_fid2));
+repeat:
+ ++loop;
+ LASSERT(loop <= 2);
- rc = lmv_fld_lookup(lmv, &op_data->op_fid2, &mds);
- if (rc)
- GOTO(out_free_sop_data, rc);
-#if 0
- /*
- * In fact, we do not need this with current intent_lock(), but
- * it may change some day.
- */
- obj = lmv_obj_grab(obd, &op_data->op_fid2);
- if (obj) {
- if (!lu_fid_eq(&op_data->op_fid1, &op_data->op_fid2)){
- rpid = obj->lo_inodes[mds].li_fid;
- mds = obj->lo_inodes[mds].li_mds;
- }
- lmv_obj_put(obj);
- }
-#endif
+ 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 {
- CDEBUG(D_OTHER, "INTENT getattr for %*s on "DFID"\n",
- op_data->op_namelen, op_data->op_name,
- PFID(&op_data->op_fid1));
-
- rc = lmv_fld_lookup(lmv, &op_data->op_fid1, &mds);
- if (rc)
- GOTO(out_free_sop_data, rc);
- obj = lmv_obj_grab(obd, &op_data->op_fid1);
- if (obj && op_data->op_namelen) {
- int mea_idx;
-
- /* directory is already split. calculate mds */
- mea_idx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
- (char *)op_data->op_name,
- op_data->op_namelen);
- rpid = obj->lo_inodes[mea_idx].li_fid;
- mds = obj->lo_inodes[mea_idx].li_mds;
- sop_data->op_bias &= ~MDS_CHECK_SPLIT;
- lmv_obj_put(obj);
-
- CDEBUG(D_OTHER, "forward to MDS #"LPU64" (slave "DFID")\n",
- mds, PFID(&rpid));
- } else {
- rc = lmv_fld_lookup(lmv, &op_data->op_fid1, &mds);
- if (rc)
- GOTO(out_free_sop_data, rc);
- sop_data->op_bias |= MDS_CHECK_SPLIT;
- }
+ 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(lmv->tgts[mds].ltd_exp, sop_data, lmm,
- lmmsize, it, flags, reqp, cb_blocking,
- extra_lock_flags);
+ rc = md_intent_lock(tgt->ltd_exp, sop_data, lmm, lmmsize, it,
+ flags, reqp, cb_blocking, extra_lock_flags);
- LASSERTF(rc != -ERESTART, "GETATTR: Got unhandled -ERESTART!\n");
+ 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);
/*
* This is split dir. In order to optimize things a bit, we
* consider obj valid updating missing parts.
-
- * FIXME: do we need to return any lock here? It would be fine
- * if we don't. This means that nobody should use UPDATE lock to
- * notify about object * removal.
*/
- CDEBUG(D_OTHER,
- "revalidate slaves for "DFID", rc %d\n",
- PFID(&op_data->op_fid2), rc);
+ 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_fid2, it, rc,
+ rc = lmv_revalidate_slaves(exp, reqp, &op_data->op_fid1, it, rc,
cb_blocking, extra_lock_flags);
GOTO(out_free_sop_data, rc);
}
GOTO(out_free_sop_data, rc);
/*
- * okay, MDS has returned success. Probably name has been resolved in
- * remote inode.
+ * 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 (it->d.lustre.it_disposition & DISP_LOOKUP_NEG)
GOTO(out_free_sop_data, rc = 0);
- LASSERT(*reqp);
- LASSERT((*reqp)->rq_repmsg);
+ 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. */
+ /*
+ * Could not find object, FID is not present in response.
+ */
if (!(body->valid & OBD_MD_FLID))
GOTO(out_free_sop_data, rc = 0);
- obj2 = lmv_obj_grab(obd, &body->fid1);
-
- if (!obj2 && (mea = lmv_get_mea(*reqp))) {
-
- /* FIXME remote capability! */
- /* wow! this is split dir, we'd like to handle it. */
- obj2 = lmv_obj_create(exp, &body->fid1, mea);
- if (IS_ERR(obj2))
- GOTO(out_free_sop_data, rc = (int)PTR_ERR(obj2));
- }
-
- if (obj2) {
- /* this is split dir and we'd want to get attrs */
- CDEBUG(D_OTHER, "attrs from slaves 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_obj_put(obj2);
- }
-
- EXIT;
-out_free_sop_data:
- OBD_FREE_PTR(sop_data);
- return rc;
-}
-
-/* this is not used currently */
-int lmv_lookup_slaves(struct obd_export *exp, struct ptlrpc_request **reqp)
-{
- struct obd_device *obd = exp->exp_obd;
- struct lmv_obd *lmv = &obd->u.lmv;
- struct lustre_handle *lockh;
- struct md_op_data *op_data;
- struct ldlm_lock *lock;
- struct mdt_body *body2;
- struct mdt_body *body;
- struct lmv_obj *obj;
- int i, rc = 0;
- ENTRY;
-
- LASSERT(reqp);
- LASSERT(*reqp);
-
- /*
- * Master is locked. we'd like to take locks on slaves and update
- * attributes to be returned from the slaves it's important that lookup
- * is called in two cases:
-
- * - for first time (dcache has no such a resolving yet). -
- * ->d_revalidate() returned false.
-
- * Last case possible only if all the objs (master and all slaves aren't
- * valid.
- */
-
- OBD_ALLOC_PTR(op_data);
- if (op_data == NULL)
- RETURN(-ENOMEM);
-
- body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
- LASSERT(body != NULL);
-
- LASSERT((body->valid & OBD_MD_FLID) != 0);
- obj = lmv_obj_grab(obd, &body->fid1);
- LASSERT(obj != NULL);
-
- CDEBUG(D_OTHER, "lookup slaves for "DFID"\n",
- PFID(&body->fid1));
-
- lmv_obj_lock(obj);
-
- for (i = 0; i < obj->lo_objcount; i++) {
- struct lu_fid fid = obj->lo_inodes[i].li_fid;
- struct ptlrpc_request *req = NULL;
- struct obd_export *tgt_exp;
- struct lookup_intent it;
-
- if (lu_fid_eq(&fid, &obj->lo_fid))
- /* skip master obj */
- continue;
-
- CDEBUG(D_OTHER, "lookup slave "DFID"\n", PFID(&fid));
-
- /* is obj valid? */
- memset(&it, 0, sizeof(it));
- it.it_op = IT_GETATTR;
-
- memset(op_data, 0, sizeof(*op_data));
- op_data->op_fid1 = fid;
- op_data->op_fid2 = fid;
- op_data->op_bias = MDS_CROSS_REF;
-
- tgt_exp = lmv_get_export(lmv, obj->lo_inodes[i].li_mds);
- if (IS_ERR(tgt_exp))
- GOTO(cleanup, rc = PTR_ERR(tgt_exp));
-
- rc = md_intent_lock(tgt_exp, op_data, NULL, 0, &it, 0,
- &req, lmv_blocking_ast, 0);
-
- lockh = (struct lustre_handle *)&it.d.lustre.it_lock_handle;
- if (rc > 0 && req == NULL) {
- /* nice, this slave is valid */
- LASSERT(req == NULL);
- CDEBUG(D_OTHER, "cached\n");
- goto release_lock;
- }
-
- if (rc < 0) {
- /* error during lookup */
- GOTO(cleanup, rc);
- }
- lock = ldlm_handle2lock(lockh);
- LASSERT(lock);
-
- lock->l_ast_data = lmv_obj_get(obj);
-
- body2 = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
- LASSERT(body2 != NULL);
-
- obj->lo_inodes[i].li_size = body2->size;
-
- CDEBUG(D_OTHER, "fresh: %lu\n",
- (unsigned long)obj->lo_inodes[i].li_size);
-
- LDLM_LOCK_PUT(lock);
-
- if (req)
- ptlrpc_req_finished(req);
-release_lock:
- lmv_update_body(body, obj->lo_inodes + i);
-
- if (it.d.lustre.it_lock_mode) {
- ldlm_lock_decref(lockh, it.d.lustre.it_lock_mode);
- it.d.lustre.it_lock_mode = 0;
- }
- }
-
- EXIT;
-cleanup:
- lmv_obj_unlock(obj);
- lmv_obj_put(obj);
- OBD_FREE_PTR(op_data);
- return rc;
-}
-
-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)
-{
- 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 mdt_body *body;
- struct lmv_obj *obj;
- int rc, loop = 0;
- int mea_idx;
- mdsno_t mds;
- ENTRY;
-
- OBD_ALLOC_PTR(sop_data);
- if (sop_data == NULL)
- RETURN(-ENOMEM);
-
- /* save op_data fro repeat case */
- *sop_data = *op_data;
-
- /*
- * IT_LOOKUP is intended to produce name -> fid resolving (let's call
- * this lookup below) or to confirm requested resolving is still valid
- * (let's call this revalidation) fid_is_sane(&sop_data->op_fid2) specifies
- * revalidation.
- */
- if (fid_is_sane(&op_data->op_fid2)) {
- /*
- * This is revalidate: we have to check is LOOKUP lock still
- * valid for given fid. Very important part is that we have to
- * choose right mds because namespace is per mds.
- */
- rpid = op_data->op_fid1;
- obj = lmv_obj_grab(obd, &rpid);
- if (obj) {
- mea_idx = raw_name2idx(obj->lo_hashtype,
- obj->lo_objcount,
- (char *)op_data->op_name,
- op_data->op_namelen);
- rpid = obj->lo_inodes[mea_idx].li_fid;
- mds = obj->lo_inodes[mea_idx].li_mds;
- sop_data->op_bias &= ~MDS_CHECK_SPLIT;
- lmv_obj_put(obj);
- } else {
- rc = lmv_fld_lookup(lmv, &rpid, &mds);
- if (rc)
- GOTO(out_free_sop_data, rc);
- sop_data->op_bias |= MDS_CHECK_SPLIT;
- }
-
- CDEBUG(D_OTHER, "revalidate lookup for "DFID" to #"LPU64" MDS\n",
- PFID(&op_data->op_fid2), mds);
- } else {
-repeat:
- ++loop;
- LASSERT(loop <= 2);
-
- /*
- * This is lookup. During lookup we have to update all the
- * attributes, because returned values will be put in struct
- * inode.
+ obj = lmv_object_find(obd, &body->fid1);
+ if (obj == NULL) {
+ /*
+ * XXX: Remote capability is not handled.
*/
- obj = lmv_obj_grab(obd, &op_data->op_fid1);
- if (obj) {
- if (op_data->op_namelen) {
- /* directory is already split. calculate mds */
- mea_idx = raw_name2idx(obj->lo_hashtype,
- obj->lo_objcount,
- (char *)op_data->op_name,
- op_data->op_namelen);
- rpid = obj->lo_inodes[mea_idx].li_fid;
- mds = obj->lo_inodes[mea_idx].li_mds;
- }
- sop_data->op_bias &= ~MDS_CHECK_SPLIT;
- lmv_obj_put(obj);
- } else {
- rc = lmv_fld_lookup(lmv, &op_data->op_fid1, &mds);
- if (rc)
- GOTO(out_free_sop_data, rc);
- sop_data->op_bias |= MDS_CHECK_SPLIT;
- }
- fid_zero(&sop_data->op_fid2);
- }
-
- sop_data->op_bias &= ~MDS_CROSS_REF;
- sop_data->op_fid1 = rpid;
-
- rc = md_intent_lock(lmv->tgts[mds].ltd_exp, sop_data, lmm, lmmsize,
- it, flags, reqp, cb_blocking, extra_lock_flags);
- if (rc > 0) {
- LASSERT(fid_is_sane(&op_data->op_fid2));
- /*
- * Very interesting. it seems object is still valid but for some
- * reason llite calls lookup, not revalidate.
- */
- CDEBUG(D_OTHER, "lookup for "DFID" and data should be uptodate\n",
- PFID(&rpid));
- LASSERT(*reqp == NULL);
- GOTO(out_free_sop_data, rc);
- }
-
- if (rc == 0 && *reqp == NULL) {
- /* once again, we're asked for lookup, not revalidate */
- CDEBUG(D_OTHER, "lookup for "DFID" and data should be uptodate\n",
- PFID(&rpid));
- GOTO(out_free_sop_data, rc);
- }
-
- 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.
- */
- CWARN("we haven't knew about directory splitting!\n");
- LASSERT(obj == NULL);
-
- obj = lmv_obj_create(exp, &rpid, NULL);
- if (IS_ERR(obj))
- GOTO(out_free_sop_data, rc = PTR_ERR(obj));
- lmv_obj_put(obj);
- goto repeat;
- }
-
- if (rc < 0)
- GOTO(out_free_sop_data, rc);
-
- /*
- * 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 && (mea = lmv_get_mea(*reqp))) {
- /* Wow! This is split dir, we'd like to handle it. */
- body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
- LASSERT(body != NULL);
- LASSERT((body->valid & OBD_MD_FLID) != 0);
-
- obj = lmv_obj_grab(obd, &body->fid1);
- if (!obj) {
- obj = lmv_obj_create(exp, &body->fid1, mea);
+ 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));
}
- lmv_obj_put(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;
int extra_lock_flags)
{
struct obd_device *obd = exp->exp_obd;
- int rc;
+ int rc;
ENTRY;
LASSERT(it != NULL);
LASSERT(fid_is_sane(&op_data->op_fid1));
- CDEBUG(D_OTHER, "INTENT LOCK '%s' for '%*s' on "DFID"\n",
+ 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));
if (rc)
RETURN(rc);
- if (it->it_op & IT_LOOKUP)
+ 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);
rc = lmv_intent_open(exp, op_data, lmm, lmmsize, it,
flags, reqp, cb_blocking,
extra_lock_flags);
- else if (it->it_op & IT_GETATTR)
- rc = lmv_intent_getattr(exp, op_data,lmm, lmmsize, it,
- flags, reqp, cb_blocking,
- extra_lock_flags);
else
LBUG();
RETURN(rc);
int master_valid, ldlm_blocking_callback cb_blocking,
int extra_lock_flags)
{
- struct obd_device *obd = exp->exp_obd;
- struct ptlrpc_request *mreq = *reqp;
- struct lmv_obd *lmv = &obd->u.lmv;
- struct lustre_handle master_lockh;
- struct obd_export *tgt_exp;
- struct md_op_data *op_data;
- struct ldlm_lock *lock;
- unsigned long size = 0;
- struct mdt_body *body;
- struct lmv_obj *obj;
- int master_lock_mode;
- int i, rc = 0;
+ 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 MDSs 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
+ * 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_obj_grab(obd, mid);
- LASSERT(obj != NULL);
-
- master_lock_mode = 0;
-
- lmv_obj_lock(obj);
+ obj = lmv_object_find_lock(obd, mid);
+ if (obj == NULL)
+ RETURN(-EALREADY);
for (i = 0; i < obj->lo_objcount; i++) {
- struct lu_fid fid = obj->lo_inodes[i].li_fid;
- struct lustre_handle *lockh = NULL;
- struct ptlrpc_request *req = NULL;
- ldlm_blocking_callback cb;
- struct lookup_intent it;
- int master = 0;
-
- CDEBUG(D_OTHER, "revalidate subobj "DFID"\n",
- PFID(&fid));
+ fid = obj->lo_stripes[i].ls_fid;
+ master = lu_fid_eq(&fid, &obj->lo_fid);
+ cb = master ? cb_blocking : lmv_blocking_ast;
- memset(op_data, 0, sizeof(*op_data));
+ /*
+ * 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;
- cb = lmv_blocking_ast;
-
- if (lu_fid_eq(&fid, &obj->lo_fid)) {
- if (master_valid) {
- /*
- * lmv_intent_getattr() already checked
- * validness and took the lock.
- */
- if (mreq) {
- /*
- * It even got the reply refresh attrs
- * from that reply.
- */
- body = req_capsule_server_get(
- &mreq->rq_pill,
- &RMF_MDT_BODY);
- LASSERT(body != NULL);
- goto update;
- }
- /* take already cached attrs into account */
- CDEBUG(D_OTHER,
- "master is locked and cached\n");
- goto release_lock;
+ 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;
}
- master = 1;
- cb = cb_blocking;
+ /*
+ * 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;
- op_data->op_bias = MDS_CROSS_REF;
+ req = NULL;
- /* Is obj valid? */
- tgt_exp = lmv_get_export(lmv, obj->lo_inodes[i].li_mds);
- if (IS_ERR(tgt_exp))
- GOTO(cleanup, rc = PTR_ERR(tgt_exp));
+ tgt = lmv_get_target(lmv, obj->lo_stripes[i].ls_mds);
+ if (IS_ERR(tgt))
+ GOTO(cleanup, rc = PTR_ERR(tgt));
- rc = md_intent_lock(tgt_exp, op_data, NULL, 0, &it, 0, &req, cb,
- extra_lock_flags);
+ 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 */
- LASSERT(req == NULL);
- CDEBUG(D_OTHER, "cached\n");
+ /*
+ * Nice, this slave is valid.
+ */
+ CDEBUG(D_INODE, "Cached slave "DFID"\n", PFID(&fid));
goto release_lock;
}
GOTO(cleanup, rc);
if (master) {
- LASSERT(master_valid == 0);
- /* Save lock on master to be returned to the caller. */
- CDEBUG(D_OTHER, "no lock on master yet\n");
+ /*
+ * 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_lock_mode = it.d.lustre.it_lock_mode;
+ master_lockm = it.d.lustre.it_lock_mode;
it.d.lustre.it_lock_mode = 0;
} else {
- /* This is slave. We want to control it. */
+ /*
+ * This is slave. We want to control it.
+ */
lock = ldlm_handle2lock(lockh);
LASSERT(lock != NULL);
- lock->l_ast_data = lmv_obj_get(obj);
+ lock->l_ast_data = lmv_object_get(obj);
LDLM_LOCK_PUT(lock);
}
* This is first reply, we'll use it to return updated
* data back to the caller.
*/
- LASSERT(req);
+ LASSERT(req != NULL);
ptlrpc_request_addref(req);
*reqp = req;
}
LASSERT(body != NULL);
update:
- obj->lo_inodes[i].li_size = body->size;
+ obj->lo_stripes[i].ls_size = body->size;
- CDEBUG(D_OTHER, "fresh: %lu\n",
- (unsigned long)obj->lo_inodes[i].li_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_inodes[i].li_size;
+ size += obj->lo_stripes[i].ls_size;
- if (it.d.lustre.it_lock_mode) {
+ 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;
}
* Some attrs got refreshed, we have reply and it's time to put
* fresh attrs to it.
*/
- CDEBUG(D_OTHER, "return refreshed attrs: size = %lu\n",
- (unsigned long)size);
+ 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) {
}
if (master_valid == 0) {
oit->d.lustre.it_lock_handle = master_lockh.cookie;
- oit->d.lustre.it_lock_mode = master_lock_mode;
+ 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_OTHER, "all the attrs were fresh\n");
+ /*
+ * 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_lock_mode;
+ oit->d.lustre.it_lock_mode = master_lockm;
rc = 1;
}
EXIT;
cleanup:
OBD_FREE_PTR(op_data);
- lmv_obj_unlock(obj);
- lmv_obj_put(obj);
+ 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 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);
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff