struct mdt_body *body;
int rc = 0;
+ /*
+ * If it returns ERR_PTR(-EBADFD) then it is an unknown hash type
+ * it will try all stripes to locate the object
+ */
tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
- if (IS_ERR(tgt))
+ if (IS_ERR(tgt) && (PTR_ERR(tgt) != -EBADFD))
return PTR_ERR(tgt);
+ /*
+ * Both migrating dir and unknown hash dir need to try
+ * all of sub-stripes
+ */
+ if (lsm && !lmv_is_known_hash_type(lsm)) {
+ struct lmv_oinfo *oinfo = &lsm->lsm_md_oinfo[0];
+
+ op_data->op_fid1 = oinfo->lmo_fid;
+ op_data->op_mds = oinfo->lmo_mds;
+ tgt = lmv_get_target(lmv, oinfo->lmo_mds, NULL);
+ if (IS_ERR(tgt))
+ return PTR_ERR(tgt);
+ }
+
if (!fid_is_sane(&op_data->op_fid2))
fid_zero(&op_data->op_fid2);
}
return rc;
} else if (it_disposition(it, DISP_LOOKUP_NEG) && lsm &&
- lsm->lsm_md_magic & LMV_HASH_FLAG_MIGRATION) {
+ lmv_need_try_all_stripes(lsm)) {
/*
- * For migrating directory, if it can not find the child in
- * the source directory(master stripe), try the targeting
- * directory(stripe 1)
+ * For migrating and unknown hash type directory, it will
+ * try to target the entry on other stripes
*/
- tgt = lmv_find_target(lmv, &lsm->lsm_md_oinfo[1].lmo_fid);
- if (IS_ERR(tgt))
- return PTR_ERR(tgt);
-
- ptlrpc_req_finished(*reqp);
- it->it_request = NULL;
- *reqp = NULL;
-
- CDEBUG(D_INODE, "For migrating dir, try target dir "DFID"\n",
- PFID(&lsm->lsm_md_oinfo[1].lmo_fid));
-
- op_data->op_fid1 = lsm->lsm_md_oinfo[1].lmo_fid;
- it->it_disposition &= ~DISP_ENQ_COMPLETE;
- rc = md_intent_lock(tgt->ltd_exp, op_data, lmm, lmmsize, it,
- flags, reqp, cb_blocking, extra_lock_flags);
+ int stripe_index;
+
+ for (stripe_index = 1;
+ stripe_index < lsm->lsm_md_stripe_count &&
+ it_disposition(it, DISP_LOOKUP_NEG); stripe_index++) {
+ struct lmv_oinfo *oinfo;
+
+ /* release the previous request */
+ ptlrpc_req_finished(*reqp);
+ it->it_request = NULL;
+ *reqp = NULL;
+
+ oinfo = &lsm->lsm_md_oinfo[stripe_index];
+ tgt = lmv_find_target(lmv, &oinfo->lmo_fid);
+ if (IS_ERR(tgt))
+ return PTR_ERR(tgt);
+
+ CDEBUG(D_INODE, "Try other stripes " DFID"\n",
+ PFID(&oinfo->lmo_fid));
+
+ op_data->op_fid1 = oinfo->lmo_fid;
+ it->it_disposition &= ~DISP_ENQ_COMPLETE;
+ rc = md_intent_lock(tgt->ltd_exp, op_data, lmm,
+ lmmsize, it, flags, reqp,
+ cb_blocking, extra_lock_flags);
+ if (rc)
+ return rc;
+ }
}
/*
idx = lmv_hash_fnv1a(stripe_count, name, namelen);
break;
default:
- CERROR("Unknown hash type 0x%x\n", hash_type);
- return -EINVAL;
+ idx = -EBADFD;
+ break;
}
CDEBUG(D_INFO, "name %.*s hash_type %d idx %d\n", namelen, name,
return tgt;
}
+/**
+ * Locate mds by fid or name
+ *
+ * For striped directory (lsm != NULL), it will locate the stripe
+ * by name hash (see lsm_name_to_stripe_info()). Note: if the hash_type
+ * is unknown, it will return -EBADFD, and lmv_intent_lookup might need
+ * walk through all of stripes to locate the entry.
+ *
+ * For normal direcotry, it will locate MDS by FID directly.
+ * \param[in] lmv LMV device
+ * \param[in] op_data client MD stack parameters, name, namelen
+ * mds_num etc.
+ * \param[in] fid object FID used to locate MDS.
+ *
+ * retval pointer to the lmv_tgt_desc if succeed.
+ * ERR_PTR(errno) if failed.
+ */
struct lmv_tgt_desc
*lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
struct lu_fid *fid)
return rc;
}
+/**
+ * Unlink a file/directory
+ *
+ * Unlink a file or directory under the parent dir. The unlink request
+ * usually will be sent to the MDT where the child is located, but if
+ * the client does not have the child FID then request will be sent to the
+ * MDT where the parent is located.
+ *
+ * If the parent is a striped directory then it also needs to locate which
+ * stripe the name of the child is located, and replace the parent FID
+ * (@op->op_fid1) with the stripe FID. Note: if the stripe is unknown,
+ * it will walk through all of sub-stripes until the child is being
+ * unlinked finally.
+ *
+ * \param[in] exp export refer to LMV
+ * \param[in] op_data different parameters transferred beween client
+ * MD stacks, name, namelen, FIDs etc.
+ * op_fid1 is the parent FID, op_fid2 is the child
+ * FID.
+ * \param[out] request point to the request of unlink.
+ *
+ * retval 0 if succeed
+ * negative errno if failed.
+ */
static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
struct ptlrpc_request **request)
{
- struct obd_device *obd = exp->exp_obd;
+ struct lmv_stripe_md *lsm = op_data->op_mea1;
+ struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *parent_tgt = NULL;
struct lmv_tgt_desc *tgt = NULL;
struct mdt_body *body;
+ int stripe_index = 0;
int rc;
rc = lmv_check_connect(obd);
if (rc)
return rc;
-retry:
- /* Send unlink requests to the MDT where the child is located */
- if (likely(!fid_is_zero(&op_data->op_fid2))) {
- tgt = lmv_find_target(lmv, &op_data->op_fid2);
- if (IS_ERR(tgt))
- return PTR_ERR(tgt);
+retry_unlink:
+ /* For striped dir, we need to locate the parent as well */
+ if (lsm) {
+ struct lmv_tgt_desc *tmp;
- /* For striped dir, we need to locate the parent as well */
- if (op_data->op_mea1) {
- struct lmv_tgt_desc *tmp;
-
- LASSERT(op_data->op_name && op_data->op_namelen);
- tmp = lmv_locate_target_for_name(lmv, op_data->op_mea1,
- op_data->op_name,
- op_data->op_namelen,
- &op_data->op_fid1,
- &op_data->op_mds);
- if (IS_ERR(tmp))
- return PTR_ERR(tmp);
+ LASSERT(op_data->op_name && op_data->op_namelen);
+
+ tmp = lmv_locate_target_for_name(lmv, lsm,
+ op_data->op_name,
+ op_data->op_namelen,
+ &op_data->op_fid1,
+ &op_data->op_mds);
+
+ /*
+ * return -EBADFD means unknown hash type, might
+ * need try all sub-stripe here
+ */
+ if (IS_ERR(tmp) && PTR_ERR(tmp) != -EBADFD)
+ return PTR_ERR(tmp);
+
+ /*
+ * Note: both migrating dir and unknown hash dir need to
+ * try all of sub-stripes, so we need start search the
+ * name from stripe 0, but migrating dir is already handled
+ * inside lmv_locate_target_for_name(), so we only check
+ * unknown hash type directory here
+ */
+ if (!lmv_is_known_hash_type(lsm)) {
+ struct lmv_oinfo *oinfo;
+
+ oinfo = &lsm->lsm_md_oinfo[stripe_index];
+
+ op_data->op_fid1 = oinfo->lmo_fid;
+ op_data->op_mds = oinfo->lmo_mds;
}
- } else {
- tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
- if (IS_ERR(tgt))
- return PTR_ERR(tgt);
}
+try_next_stripe:
+ /* Send unlink requests to the MDT where the child is located */
+ if (likely(!fid_is_zero(&op_data->op_fid2)))
+ tgt = lmv_find_target(lmv, &op_data->op_fid2);
+ else if (lsm)
+ tgt = lmv_get_target(lmv, op_data->op_mds, NULL);
+ else
+ tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
+
+ if (IS_ERR(tgt))
+ return PTR_ERR(tgt);
+
op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
op_data->op_cap = cfs_curproc_cap_pack();
PFID(&op_data->op_fid1), PFID(&op_data->op_fid2), tgt->ltd_idx);
rc = md_unlink(tgt->ltd_exp, op_data, request);
- if (rc != 0 && rc != -EREMOTE)
+ if (rc != 0 && rc != -EREMOTE && rc != -ENOENT)
return rc;
+ /* Try next stripe if it is needed. */
+ if (rc == -ENOENT && lsm && lmv_need_try_all_stripes(lsm)) {
+ struct lmv_oinfo *oinfo;
+
+ stripe_index++;
+ if (stripe_index >= lsm->lsm_md_stripe_count)
+ return rc;
+
+ oinfo = &lsm->lsm_md_oinfo[stripe_index];
+
+ op_data->op_fid1 = oinfo->lmo_fid;
+ op_data->op_mds = oinfo->lmo_mds;
+
+ ptlrpc_req_finished(*request);
+ *request = NULL;
+
+ goto try_next_stripe;
+ }
+
body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
if (!body)
return -EPROTO;
ptlrpc_req_finished(*request);
*request = NULL;
- goto retry;
+ goto retry_unlink;
}
static int lmv_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
lsm->lsm_md_magic = le32_to_cpu(lmm1->lmv_magic);
lsm->lsm_md_stripe_count = le32_to_cpu(lmm1->lmv_stripe_count);
lsm->lsm_md_master_mdt_index = le32_to_cpu(lmm1->lmv_master_mdt_index);
- lsm->lsm_md_hash_type = le32_to_cpu(lmm1->lmv_hash_type);
+ if (OBD_FAIL_CHECK(OBD_FAIL_UNKNOWN_LMV_STRIPE))
+ lsm->lsm_md_hash_type = LMV_HASH_TYPE_UNKNOWN;
+ else
+ lsm->lsm_md_hash_type = le32_to_cpu(lmm1->lmv_hash_type);
lsm->lsm_md_layout_version = le32_to_cpu(lmm1->lmv_layout_version);
fid_le_to_cpu(&lsm->lsm_md_master_fid, &lmm1->lmv_master_fid);
cplen = strlcpy(lsm->lsm_md_pool_name, lmm1->lmv_pool_name,
projects / linux-beck.git / commitdiff