* GPL HEADER END
*/
/*
- * Copyright (c) 2017 Intel Corporation.
+ * Copyright (c) 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#include <obd_class.h>
#include <lustre_osc.h>
+#include <uapi/linux/lustre/lustre_param.h>
#include "mdc_internal.h"
-int mdc_lock_init(const struct lu_env *env,
- struct cl_object *obj, struct cl_lock *lock,
- const struct cl_io *unused)
+static void mdc_lock_build_policy(const struct lu_env *env,
+ const struct cl_lock *lock,
+ union ldlm_policy_data *policy)
{
- return 0;
+ memset(policy, 0, sizeof *policy);
+ policy->l_inodebits.bits = MDS_INODELOCK_DOM;
+ if (lock) {
+ policy->l_inodebits.li_gid = lock->cll_descr.cld_gid;
+ }
+}
+
+int mdc_ldlm_glimpse_ast(struct ldlm_lock *dlmlock, void *data)
+{
+ return osc_ldlm_glimpse_ast(dlmlock, data);
+}
+
+static void mdc_lock_build_einfo(const struct lu_env *env,
+ const struct cl_lock *lock,
+ struct osc_object *osc,
+ struct ldlm_enqueue_info *einfo)
+{
+ einfo->ei_type = LDLM_IBITS;
+ einfo->ei_mode = osc_cl_lock2ldlm(lock->cll_descr.cld_mode);
+ einfo->ei_cb_bl = mdc_ldlm_blocking_ast;
+ einfo->ei_cb_cp = ldlm_completion_ast;
+ einfo->ei_cb_gl = mdc_ldlm_glimpse_ast;
+ einfo->ei_cbdata = osc; /* value to be put into ->l_ast_data */
+}
+
+static void mdc_lock_lvb_update(const struct lu_env *env,
+ struct osc_object *osc,
+ struct ldlm_lock *dlmlock,
+ struct ost_lvb *lvb);
+
+static int mdc_set_dom_lock_data(struct ldlm_lock *lock, void *data)
+{
+ int set = 0;
+
+ LASSERT(lock != NULL);
+ LASSERT(lock->l_glimpse_ast == mdc_ldlm_glimpse_ast);
+
+ lock_res_and_lock(lock);
+
+ if (lock->l_ast_data == NULL)
+ lock->l_ast_data = data;
+ if (lock->l_ast_data == data)
+ set = 1;
+
+ unlock_res_and_lock(lock);
+
+ return set;
+}
+
+int mdc_dom_lock_match(const struct lu_env *env, struct obd_export *exp,
+ struct ldlm_res_id *res_id, enum ldlm_type type,
+ union ldlm_policy_data *policy, enum ldlm_mode mode,
+ __u64 *flags, struct osc_object *obj,
+ struct lustre_handle *lockh,
+ enum ldlm_match_flags match_flags)
+{
+ struct obd_device *obd = exp->exp_obd;
+ __u64 lflags = *flags;
+ enum ldlm_mode rc;
+
+ ENTRY;
+
+ rc = ldlm_lock_match_with_skip(obd->obd_namespace, lflags, 0,
+ res_id, type, policy, mode, lockh, match_flags);
+
+ if (rc == 0 || lflags & LDLM_FL_TEST_LOCK)
+ RETURN(rc);
+
+ if (obj != NULL) {
+ struct ldlm_lock *lock = ldlm_handle2lock(lockh);
+
+ LASSERT(lock != NULL);
+ if (mdc_set_dom_lock_data(lock, obj)) {
+ lock_res_and_lock(lock);
+ if (!ldlm_is_lvb_cached(lock)) {
+ LASSERT(lock->l_ast_data == obj);
+ mdc_lock_lvb_update(env, obj, lock, NULL);
+ ldlm_set_lvb_cached(lock);
+ }
+ unlock_res_and_lock(lock);
+ } else {
+ ldlm_lock_decref(lockh, rc);
+ rc = 0;
+ }
+ LDLM_LOCK_PUT(lock);
+ }
+ RETURN(rc);
+}
+
+/**
+ * Finds an existing lock covering a page with given index.
+ * Copy of osc_obj_dlmlock_at_pgoff() but for DoM IBITS lock.
+ */
+struct ldlm_lock *mdc_dlmlock_at_pgoff(const struct lu_env *env,
+ struct osc_object *obj, pgoff_t index,
+ enum osc_dap_flags dap_flags)
+{
+ struct osc_thread_info *info = osc_env_info(env);
+ struct ldlm_res_id *resname = &info->oti_resname;
+ union ldlm_policy_data *policy = &info->oti_policy;
+ struct lustre_handle lockh;
+ struct ldlm_lock *lock = NULL;
+ enum ldlm_mode mode;
+ __u64 flags;
+ enum ldlm_match_flags match_flags = 0;
+
+ ENTRY;
+
+ fid_build_reg_res_name(lu_object_fid(osc2lu(obj)), resname);
+ mdc_lock_build_policy(env, NULL, policy);
+ policy->l_inodebits.li_gid = LDLM_GID_ANY;
+
+ flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING;
+ if (dap_flags & OSC_DAP_FL_TEST_LOCK)
+ flags |= LDLM_FL_TEST_LOCK;
+
+ if (dap_flags & OSC_DAP_FL_AST)
+ match_flags |= LDLM_MATCH_AST;
+
+ if (dap_flags & OSC_DAP_FL_CANCELING)
+ match_flags |= LDLM_MATCH_UNREF;
+
+again:
+ /* Next, search for already existing extent locks that will cover us */
+ /* If we're trying to read, we also search for an existing PW lock. The
+ * VFS and page cache already protect us locally, so lots of readers/
+ * writers can share a single PW lock. */
+ mode = mdc_dom_lock_match(env, osc_export(obj), resname, LDLM_IBITS,
+ policy, LCK_PR | LCK_PW | LCK_GROUP, &flags,
+ obj, &lockh, match_flags);
+ if (mode != 0) {
+ lock = ldlm_handle2lock(&lockh);
+ /* RACE: the lock is cancelled so let's try again */
+ if (unlikely(lock == NULL))
+ goto again;
+ }
+
+ RETURN(lock);
+}
+
+/**
+ * Check if page @page is covered by an extra lock or discard it.
+ */
+static bool mdc_check_and_discard_cb(const struct lu_env *env, struct cl_io *io,
+ struct osc_page *ops, void *cbdata)
+{
+ struct osc_thread_info *info = osc_env_info(env);
+ struct osc_object *osc = cbdata;
+ pgoff_t index;
+
+ index = osc_index(ops);
+ if (index >= info->oti_fn_index) {
+ struct ldlm_lock *tmp;
+ struct cl_page *page = ops->ops_cl.cpl_page;
+
+ /* refresh non-overlapped index */
+ tmp = mdc_dlmlock_at_pgoff(env, osc, index,
+ OSC_DAP_FL_TEST_LOCK | OSC_DAP_FL_AST);
+ if (tmp != NULL) {
+ info->oti_fn_index = CL_PAGE_EOF;
+ LDLM_LOCK_PUT(tmp);
+ } else if (cl_page_own(env, io, page) == 0) {
+ /* discard the page */
+ cl_page_discard(env, io, page);
+ cl_page_disown(env, io, page);
+ } else {
+ LASSERT(page->cp_state == CPS_FREEING);
+ }
+ }
+
+ info->oti_next_index = index + 1;
+ return true;
+}
+
+/**
+ * Discard pages protected by the given lock. This function traverses radix
+ * tree to find all covering pages and discard them. If a page is being covered
+ * by other locks, it should remain in cache.
+ *
+ * If error happens on any step, the process continues anyway (the reasoning
+ * behind this being that lock cancellation cannot be delayed indefinitely).
+ */
+static int mdc_lock_discard_pages(const struct lu_env *env,
+ struct osc_object *osc,
+ pgoff_t start, pgoff_t end,
+ bool discard)
+{
+ struct osc_thread_info *info = osc_env_info(env);
+ struct cl_io *io = &info->oti_io;
+ osc_page_gang_cbt cb;
+ int result;
+
+ ENTRY;
+
+ io->ci_obj = cl_object_top(osc2cl(osc));
+ io->ci_ignore_layout = 1;
+ result = cl_io_init(env, io, CIT_MISC, io->ci_obj);
+ if (result != 0)
+ GOTO(out, result);
+
+ cb = discard ? osc_discard_cb : mdc_check_and_discard_cb;
+ info->oti_fn_index = info->oti_next_index = start;
+
+ osc_page_gang_lookup(env, io, osc, info->oti_next_index,
+ end, cb, (void *)osc);
+out:
+ cl_io_fini(env, io);
+ RETURN(result);
+}
+
+static int mdc_lock_flush(const struct lu_env *env, struct osc_object *obj,
+ pgoff_t start, pgoff_t end, enum cl_lock_mode mode,
+ bool discard)
+{
+ int result = 0;
+ int rc;
+
+ ENTRY;
+
+ if (mode == CLM_WRITE) {
+ result = osc_cache_writeback_range(env, obj, start, end, 1,
+ discard);
+ CDEBUG(D_CACHE, "object %p: [%lu -> %lu] %d pages were %s.\n",
+ obj, start, end, result,
+ discard ? "discarded" : "written back");
+ if (result > 0)
+ result = 0;
+ }
+
+ /* Avoid lock matching with CLM_WRITE, there can be no other locks */
+ rc = mdc_lock_discard_pages(env, obj, start, end,
+ mode == CLM_WRITE || discard);
+ if (result == 0 && rc < 0)
+ result = rc;
+
+ RETURN(result);
+}
+
+void mdc_lock_lockless_cancel(const struct lu_env *env,
+ const struct cl_lock_slice *slice)
+{
+ struct osc_lock *ols = cl2osc_lock(slice);
+ struct osc_object *osc = cl2osc(slice->cls_obj);
+ struct cl_lock_descr *descr = &slice->cls_lock->cll_descr;
+ int rc;
+
+ LASSERT(ols->ols_dlmlock == NULL);
+ rc = mdc_lock_flush(env, osc, descr->cld_start, descr->cld_end,
+ descr->cld_mode, 0);
+ if (rc != 0)
+ CERROR("Pages for lockless lock %p were not purged(%d)\n",
+ ols, rc);
+
+ osc_lock_wake_waiters(env, osc, ols);
+}
+
+/**
+ * Helper for osc_dlm_blocking_ast() handling discrepancies between cl_lock
+ * and ldlm_lock caches.
+ */
+static int mdc_dlm_blocking_ast0(const struct lu_env *env,
+ struct ldlm_lock *dlmlock,
+ int flag)
+{
+ struct cl_object *obj = NULL;
+ int result = 0;
+ bool discard;
+ enum cl_lock_mode mode = CLM_READ;
+
+ ENTRY;
+
+ LASSERT(flag == LDLM_CB_CANCELING);
+ LASSERT(dlmlock != NULL);
+
+ lock_res_and_lock(dlmlock);
+ if (dlmlock->l_granted_mode != dlmlock->l_req_mode) {
+ dlmlock->l_ast_data = NULL;
+ unlock_res_and_lock(dlmlock);
+ RETURN(0);
+ }
+
+ discard = ldlm_is_discard_data(dlmlock);
+ if (dlmlock->l_granted_mode & (LCK_PW | LCK_GROUP))
+ mode = CLM_WRITE;
+
+ if (dlmlock->l_ast_data != NULL) {
+ obj = osc2cl(dlmlock->l_ast_data);
+ cl_object_get(obj);
+ }
+ unlock_res_and_lock(dlmlock);
+
+ /* if l_ast_data is NULL, the dlmlock was enqueued by AGL or
+ * the object has been destroyed. */
+ if (obj != NULL) {
+ struct cl_attr *attr = &osc_env_info(env)->oti_attr;
+
+ /* Destroy pages covered by the extent of the DLM lock */
+ result = mdc_lock_flush(env, cl2osc(obj), cl_index(obj, 0),
+ CL_PAGE_EOF, mode, discard);
+ /* Losing a lock, set KMS to 0.
+ * NB: assumed that DOM lock covers whole data on MDT.
+ */
+ /* losing a lock, update kms */
+ lock_res_and_lock(dlmlock);
+ dlmlock->l_ast_data = NULL;
+ cl_object_attr_lock(obj);
+ attr->cat_kms = 0;
+ cl_object_attr_update(env, obj, attr, CAT_KMS);
+ cl_object_attr_unlock(obj);
+ unlock_res_and_lock(dlmlock);
+ cl_object_put(env, obj);
+ }
+ RETURN(result);
+}
+
+int mdc_ldlm_blocking_ast(struct ldlm_lock *dlmlock,
+ struct ldlm_lock_desc *new, void *data, int flag)
+{
+ int rc = 0;
+
+ ENTRY;
+
+ switch (flag) {
+ case LDLM_CB_BLOCKING: {
+ struct lustre_handle lockh;
+
+ ldlm_lock2handle(dlmlock, &lockh);
+ rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
+ if (rc == -ENODATA)
+ rc = 0;
+ break;
+ }
+ case LDLM_CB_CANCELING: {
+ struct lu_env *env;
+ __u16 refcheck;
+
+ /*
+ * This can be called in the context of outer IO, e.g.,
+ *
+ * osc_enqueue_base()->...
+ * ->ldlm_prep_elc_req()->...
+ * ->ldlm_cancel_callback()->...
+ * ->osc_ldlm_blocking_ast()
+ *
+ * new environment has to be created to not corrupt outer
+ * context.
+ */
+ env = cl_env_get(&refcheck);
+ if (IS_ERR(env)) {
+ rc = PTR_ERR(env);
+ break;
+ }
+
+ rc = mdc_dlm_blocking_ast0(env, dlmlock, flag);
+ cl_env_put(env, &refcheck);
+ break;
+ }
+ default:
+ LBUG();
+ }
+ RETURN(rc);
+}
+
+/**
+ * Updates object attributes from a lock value block (lvb) received together
+ * with the DLM lock reply from the server.
+ * This can be optimized to not update attributes when lock is a result of a
+ * local match.
+ *
+ * Called under lock and resource spin-locks.
+ */
+void mdc_lock_lvb_update(const struct lu_env *env, struct osc_object *osc,
+ struct ldlm_lock *dlmlock, struct ost_lvb *lvb)
+{
+ struct cl_object *obj = osc2cl(osc);
+ struct lov_oinfo *oinfo = osc->oo_oinfo;
+ struct cl_attr *attr = &osc_env_info(env)->oti_attr;
+ unsigned valid = CAT_BLOCKS | CAT_ATIME | CAT_CTIME | CAT_MTIME |
+ CAT_SIZE;
+ unsigned int setkms = 0;
+
+ ENTRY;
+
+ if (lvb == NULL) {
+ LASSERT(dlmlock != NULL);
+ lvb = &dlmlock->l_ost_lvb;
+ }
+ cl_lvb2attr(attr, lvb);
+
+ cl_object_attr_lock(obj);
+ if (dlmlock != NULL) {
+ __u64 size;
+
+ check_res_locked(dlmlock->l_resource);
+ size = lvb->lvb_size;
+
+ if (size >= oinfo->loi_kms) {
+ valid |= CAT_KMS;
+ attr->cat_kms = size;
+ setkms = 1;
+ }
+ }
+
+ /* The size should not be less than the kms */
+ if (attr->cat_size < oinfo->loi_kms)
+ attr->cat_size = oinfo->loi_kms;
+
+ LDLM_DEBUG(dlmlock, "acquired size %llu, setting rss=%llu;%s "
+ "kms=%llu, end=%llu", lvb->lvb_size, attr->cat_size,
+ setkms ? "" : " leaving",
+ setkms ? attr->cat_kms : oinfo->loi_kms,
+ dlmlock ? dlmlock->l_policy_data.l_extent.end : -1ull);
+
+ cl_object_attr_update(env, obj, attr, valid);
+ cl_object_attr_unlock(obj);
+ EXIT;
+}
+
+static void mdc_lock_granted(const struct lu_env *env, struct osc_lock *oscl,
+ struct lustre_handle *lockh)
+{
+ struct osc_object *osc = cl2osc(oscl->ols_cl.cls_obj);
+ struct ldlm_lock *dlmlock;
+
+ ENTRY;
+
+ dlmlock = ldlm_handle2lock_long(lockh, 0);
+ LASSERT(dlmlock != NULL);
+
+ /* lock reference taken by ldlm_handle2lock_long() is
+ * owned by osc_lock and released in osc_lock_detach()
+ */
+ lu_ref_add(&dlmlock->l_reference, "osc_lock", oscl);
+ oscl->ols_has_ref = 1;
+
+ LASSERT(oscl->ols_dlmlock == NULL);
+ oscl->ols_dlmlock = dlmlock;
+
+ /* This may be a matched lock for glimpse request, do not hold
+ * lock reference in that case. */
+ if (!oscl->ols_glimpse) {
+ /* hold a refc for non glimpse lock which will
+ * be released in osc_lock_cancel() */
+ lustre_handle_copy(&oscl->ols_handle, lockh);
+ ldlm_lock_addref(lockh, oscl->ols_einfo.ei_mode);
+ oscl->ols_hold = 1;
+ }
+
+ /* Lock must have been granted. */
+ lock_res_and_lock(dlmlock);
+ if (dlmlock->l_granted_mode == dlmlock->l_req_mode) {
+ struct cl_lock_descr *descr = &oscl->ols_cl.cls_lock->cll_descr;
+
+ /* extend the lock extent, otherwise it will have problem when
+ * we decide whether to grant a lockless lock. */
+ descr->cld_mode = osc_ldlm2cl_lock(dlmlock->l_granted_mode);
+ descr->cld_start = cl_index(descr->cld_obj, 0);
+ descr->cld_end = CL_PAGE_EOF;
+
+ /* no lvb update for matched lock */
+ if (!ldlm_is_lvb_cached(dlmlock)) {
+ LASSERT(oscl->ols_flags & LDLM_FL_LVB_READY);
+ LASSERT(osc == dlmlock->l_ast_data);
+ mdc_lock_lvb_update(env, osc, dlmlock, NULL);
+ ldlm_set_lvb_cached(dlmlock);
+ }
+ }
+ unlock_res_and_lock(dlmlock);
+
+ LASSERT(oscl->ols_state != OLS_GRANTED);
+ oscl->ols_state = OLS_GRANTED;
+ EXIT;
+}
+
+/**
+ * Lock upcall function that is executed either when a reply to ENQUEUE rpc is
+ * received from a server, or after osc_enqueue_base() matched a local DLM
+ * lock.
+ */
+static int mdc_lock_upcall(void *cookie, struct lustre_handle *lockh,
+ int errcode)
+{
+ struct osc_lock *oscl = cookie;
+ struct cl_lock_slice *slice = &oscl->ols_cl;
+ struct lu_env *env;
+ int rc;
+
+ ENTRY;
+
+ env = cl_env_percpu_get();
+ /* should never happen, similar to osc_ldlm_blocking_ast(). */
+ LASSERT(!IS_ERR(env));
+
+ rc = ldlm_error2errno(errcode);
+ if (oscl->ols_state == OLS_ENQUEUED) {
+ oscl->ols_state = OLS_UPCALL_RECEIVED;
+ } else if (oscl->ols_state == OLS_CANCELLED) {
+ rc = -EIO;
+ } else {
+ CERROR("Impossible state: %d\n", oscl->ols_state);
+ LBUG();
+ }
+
+ CDEBUG(D_INODE, "rc %d, err %d\n", rc, errcode);
+ if (rc == 0)
+ mdc_lock_granted(env, oscl, lockh);
+
+ /* Error handling, some errors are tolerable. */
+ if (oscl->ols_locklessable && rc == -EUSERS) {
+ /* This is a tolerable error, turn this lock into
+ * lockless lock.
+ */
+ osc_object_set_contended(cl2osc(slice->cls_obj));
+ LASSERT(slice->cls_ops != oscl->ols_lockless_ops);
+
+ /* Change this lock to ldlmlock-less lock. */
+ osc_lock_to_lockless(env, oscl, 1);
+ oscl->ols_state = OLS_GRANTED;
+ rc = 0;
+ } else if (oscl->ols_glimpse && rc == -ENAVAIL) {
+ LASSERT(oscl->ols_flags & LDLM_FL_LVB_READY);
+ mdc_lock_lvb_update(env, cl2osc(slice->cls_obj),
+ NULL, &oscl->ols_lvb);
+ /* Hide the error. */
+ rc = 0;
+ }
+
+ if (oscl->ols_owner != NULL)
+ cl_sync_io_note(env, oscl->ols_owner, rc);
+ cl_env_percpu_put(env);
+
+ RETURN(rc);
+}
+
+int mdc_fill_lvb(struct ptlrpc_request *req, struct ost_lvb *lvb)
+{
+ struct mdt_body *body;
+
+ body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
+ if (!body)
+ RETURN(-EPROTO);
+
+ lvb->lvb_mtime = body->mbo_mtime;
+ lvb->lvb_atime = body->mbo_atime;
+ lvb->lvb_ctime = body->mbo_ctime;
+ lvb->lvb_blocks = body->mbo_dom_blocks;
+ lvb->lvb_size = body->mbo_dom_size;
+
+ RETURN(0);
+}
+
+int mdc_enqueue_fini(struct ptlrpc_request *req, osc_enqueue_upcall_f upcall,
+ void *cookie, struct lustre_handle *lockh,
+ enum ldlm_mode mode, __u64 *flags, int errcode)
+{
+ struct osc_lock *ols = cookie;
+ struct ldlm_lock *lock;
+ int rc = 0;
+
+ ENTRY;
+
+ /* The request was created before ldlm_cli_enqueue call. */
+ if (errcode == ELDLM_LOCK_ABORTED) {
+ struct ldlm_reply *rep;
+
+ rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
+ LASSERT(rep != NULL);
+
+ rep->lock_policy_res2 =
+ ptlrpc_status_ntoh(rep->lock_policy_res2);
+ if (rep->lock_policy_res2)
+ errcode = rep->lock_policy_res2;
+
+ rc = mdc_fill_lvb(req, &ols->ols_lvb);
+ *flags |= LDLM_FL_LVB_READY;
+ } else if (errcode == ELDLM_OK) {
+ /* Callers have references, should be valid always */
+ lock = ldlm_handle2lock(lockh);
+ LASSERT(lock);
+
+ rc = mdc_fill_lvb(req, &lock->l_ost_lvb);
+ LDLM_LOCK_PUT(lock);
+ *flags |= LDLM_FL_LVB_READY;
+ }
+
+ /* Call the update callback. */
+ rc = (*upcall)(cookie, lockh, rc < 0 ? rc : errcode);
+
+ /* release the reference taken in ldlm_cli_enqueue() */
+ if (errcode == ELDLM_LOCK_MATCHED)
+ errcode = ELDLM_OK;
+ if (errcode == ELDLM_OK && lustre_handle_is_used(lockh))
+ ldlm_lock_decref(lockh, mode);
+
+ RETURN(rc);
+}
+
+int mdc_enqueue_interpret(const struct lu_env *env, struct ptlrpc_request *req,
+ void *args, int rc)
+{
+ struct osc_enqueue_args *aa = args;
+ struct ldlm_lock *lock;
+ struct lustre_handle *lockh = &aa->oa_lockh;
+ enum ldlm_mode mode = aa->oa_mode;
+
+ ENTRY;
+
+ LASSERT(!aa->oa_speculative);
+
+ /* ldlm_cli_enqueue is holding a reference on the lock, so it must
+ * be valid. */
+ lock = ldlm_handle2lock(lockh);
+ LASSERTF(lock != NULL,
+ "lockh %#llx, req %p, aa %p - client evicted?\n",
+ lockh->cookie, req, aa);
+
+ /* Take an additional reference so that a blocking AST that
+ * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
+ * to arrive after an upcall has been executed by
+ * osc_enqueue_fini(). */
+ ldlm_lock_addref(lockh, mode);
+
+ /* Let cl_lock_state_wait fail with -ERESTARTSYS to unuse sublocks. */
+ OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_HANG, 2);
+
+ /* Let CP AST to grant the lock first. */
+ OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 1);
+
+ /* Complete obtaining the lock procedure. */
+ rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_type, 1,
+ aa->oa_mode, aa->oa_flags, NULL, 0,
+ lockh, rc);
+ /* Complete mdc stuff. */
+ rc = mdc_enqueue_fini(req, aa->oa_upcall, aa->oa_cookie, lockh, mode,
+ aa->oa_flags, rc);
+
+ OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
+
+ ldlm_lock_decref(lockh, mode);
+ LDLM_LOCK_PUT(lock);
+ RETURN(rc);
+}
+
+/* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
+ * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
+ * other synchronous requests, however keeping some locks and trying to obtain
+ * others may take a considerable amount of time in a case of ost failure; and
+ * when other sync requests do not get released lock from a client, the client
+ * is excluded from the cluster -- such scenarious make the life difficult, so
+ * release locks just after they are obtained. */
+int mdc_enqueue_send(const struct lu_env *env, struct obd_export *exp,
+ struct ldlm_res_id *res_id, __u64 *flags,
+ union ldlm_policy_data *policy,
+ struct ost_lvb *lvb, int kms_valid,
+ osc_enqueue_upcall_f upcall, void *cookie,
+ struct ldlm_enqueue_info *einfo, int async)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lustre_handle lockh = { 0 };
+ struct ptlrpc_request *req = NULL;
+ struct ldlm_intent *lit;
+ enum ldlm_mode mode;
+ bool glimpse = *flags & LDLM_FL_HAS_INTENT;
+ __u64 match_flags = *flags;
+ LIST_HEAD(cancels);
+ int rc, count;
+
+ ENTRY;
+
+ mode = einfo->ei_mode;
+ if (einfo->ei_mode == LCK_PR)
+ mode |= LCK_PW;
+
+ if (glimpse)
+ match_flags |= LDLM_FL_BLOCK_GRANTED;
+ /* DOM locking uses LDLM_FL_KMS_IGNORE to mark locks wich have no valid
+ * LVB information, e.g. canceled locks or locks of just pruned object,
+ * such locks should be skipped.
+ */
+ mode = ldlm_lock_match(obd->obd_namespace, match_flags, res_id,
+ einfo->ei_type, policy, mode, &lockh);
+ if (mode) {
+ struct ldlm_lock *matched;
+
+ if (*flags & LDLM_FL_TEST_LOCK)
+ RETURN(ELDLM_OK);
+
+ matched = ldlm_handle2lock(&lockh);
+
+ if (OBD_FAIL_CHECK(OBD_FAIL_MDC_GLIMPSE_DDOS))
+ ldlm_set_kms_ignore(matched);
+
+ if (mdc_set_dom_lock_data(matched, einfo->ei_cbdata)) {
+ *flags |= LDLM_FL_LVB_READY;
+
+ /* We already have a lock, and it's referenced. */
+ (*upcall)(cookie, &lockh, ELDLM_LOCK_MATCHED);
+
+ ldlm_lock_decref(&lockh, mode);
+ LDLM_LOCK_PUT(matched);
+ RETURN(ELDLM_OK);
+ }
+ ldlm_lock_decref(&lockh, mode);
+ LDLM_LOCK_PUT(matched);
+ }
+
+ if (*flags & (LDLM_FL_TEST_LOCK | LDLM_FL_MATCH_LOCK))
+ RETURN(-ENOLCK);
+
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_LDLM_INTENT);
+ if (req == NULL)
+ RETURN(-ENOMEM);
+
+ /* For WRITE lock cancel other locks on resource early if any */
+ if (einfo->ei_mode & LCK_PW)
+ count = mdc_resource_get_unused_res(exp, res_id, &cancels,
+ einfo->ei_mode,
+ MDS_INODELOCK_DOM);
+ else
+ count = 0;
+
+ rc = ldlm_prep_enqueue_req(exp, req, &cancels, count);
+ if (rc < 0) {
+ ptlrpc_request_free(req);
+ RETURN(rc);
+ }
+
+ /* pack the intent */
+ lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
+ lit->opc = glimpse ? IT_GLIMPSE : IT_BRW;
+
+ req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER, 0);
+ req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER, 0);
+ ptlrpc_request_set_replen(req);
+
+ /* users of mdc_enqueue() can pass this flag for ldlm_lock_match() */
+ *flags &= ~LDLM_FL_BLOCK_GRANTED;
+ /* All MDC IO locks are intents */
+ *flags |= LDLM_FL_HAS_INTENT;
+ rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, NULL,
+ 0, LVB_T_NONE, &lockh, async);
+ if (async) {
+ if (!rc) {
+ struct osc_enqueue_args *aa;
+
+ aa = ptlrpc_req_async_args(aa, req);
+ aa->oa_exp = exp;
+ aa->oa_mode = einfo->ei_mode;
+ aa->oa_type = einfo->ei_type;
+ lustre_handle_copy(&aa->oa_lockh, &lockh);
+ aa->oa_upcall = upcall;
+ aa->oa_cookie = cookie;
+ aa->oa_speculative = false;
+ aa->oa_flags = flags;
+ aa->oa_lvb = lvb;
+
+ req->rq_interpret_reply = mdc_enqueue_interpret;
+ ptlrpcd_add_req(req);
+ } else {
+ ptlrpc_req_finished(req);
+ }
+ RETURN(rc);
+ }
+
+ rc = mdc_enqueue_fini(req, upcall, cookie, &lockh, einfo->ei_mode,
+ flags, rc);
+ ptlrpc_req_finished(req);
+ RETURN(rc);
+}
+
+/**
+ * Implementation of cl_lock_operations::clo_enqueue() method for osc
+ * layer. This initiates ldlm enqueue:
+ *
+ * - cancels conflicting locks early (osc_lock_enqueue_wait());
+ *
+ * - calls osc_enqueue_base() to do actual enqueue.
+ *
+ * osc_enqueue_base() is supplied with an upcall function that is executed
+ * when lock is received either after a local cached ldlm lock is matched, or
+ * when a reply from the server is received.
+ *
+ * This function does not wait for the network communication to complete.
+ */
+static int mdc_lock_enqueue(const struct lu_env *env,
+ const struct cl_lock_slice *slice,
+ struct cl_io *unused, struct cl_sync_io *anchor)
+{
+ struct osc_thread_info *info = osc_env_info(env);
+ struct osc_io *oio = osc_env_io(env);
+ struct osc_object *osc = cl2osc(slice->cls_obj);
+ struct osc_lock *oscl = cl2osc_lock(slice);
+ struct cl_lock *lock = slice->cls_lock;
+ struct ldlm_res_id *resname = &info->oti_resname;
+ union ldlm_policy_data *policy = &info->oti_policy;
+ osc_enqueue_upcall_f upcall = mdc_lock_upcall;
+ void *cookie = (void *)oscl;
+ bool async = false;
+ int result;
+
+ ENTRY;
+
+ LASSERTF(ergo(oscl->ols_glimpse, lock->cll_descr.cld_mode <= CLM_READ),
+ "lock = %p, ols = %p\n", lock, oscl);
+
+ if (oscl->ols_state == OLS_GRANTED)
+ RETURN(0);
+
+ /* Lockahead is not supported on MDT yet */
+ if (oscl->ols_flags & LDLM_FL_NO_EXPANSION) {
+ result = -EOPNOTSUPP;
+ RETURN(result);
+ }
+
+ if (oscl->ols_flags & LDLM_FL_TEST_LOCK)
+ GOTO(enqueue_base, 0);
+
+ if (oscl->ols_glimpse) {
+ LASSERT(equi(oscl->ols_speculative, anchor == NULL));
+ async = true;
+ GOTO(enqueue_base, 0);
+ }
+
+ result = osc_lock_enqueue_wait(env, osc, oscl);
+ if (result < 0)
+ GOTO(out, result);
+
+ /* we can grant lockless lock right after all conflicting locks
+ * are canceled. */
+ if (osc_lock_is_lockless(oscl)) {
+ oscl->ols_state = OLS_GRANTED;
+ oio->oi_lockless = 1;
+ RETURN(0);
+ }
+
+enqueue_base:
+ oscl->ols_state = OLS_ENQUEUED;
+ if (anchor != NULL) {
+ atomic_inc(&anchor->csi_sync_nr);
+ oscl->ols_owner = anchor;
+ }
+
+ /**
+ * DLM lock's ast data must be osc_object;
+ * DLM's enqueue callback set to osc_lock_upcall() with cookie as
+ * osc_lock.
+ */
+ fid_build_reg_res_name(lu_object_fid(osc2lu(osc)), resname);
+ mdc_lock_build_policy(env, lock, policy);
+ LASSERT(!oscl->ols_speculative);
+ result = mdc_enqueue_send(env, osc_export(osc), resname,
+ &oscl->ols_flags, policy,
+ &oscl->ols_lvb, osc->oo_oinfo->loi_kms_valid,
+ upcall, cookie, &oscl->ols_einfo, async);
+ if (result == 0) {
+ if (osc_lock_is_lockless(oscl)) {
+ oio->oi_lockless = 1;
+ } else if (!async) {
+ LASSERT(oscl->ols_state == OLS_GRANTED);
+ LASSERT(oscl->ols_hold);
+ LASSERT(oscl->ols_dlmlock != NULL);
+ }
+ }
+out:
+ if (result < 0) {
+ oscl->ols_state = OLS_CANCELLED;
+ osc_lock_wake_waiters(env, osc, oscl);
+
+ if (anchor != NULL)
+ cl_sync_io_note(env, anchor, result);
+ }
+ RETURN(result);
+}
+
+static const struct cl_lock_operations mdc_lock_lockless_ops = {
+ .clo_fini = osc_lock_fini,
+ .clo_enqueue = mdc_lock_enqueue,
+ .clo_cancel = mdc_lock_lockless_cancel,
+ .clo_print = osc_lock_print
+};
+
+static const struct cl_lock_operations mdc_lock_ops = {
+ .clo_fini = osc_lock_fini,
+ .clo_enqueue = mdc_lock_enqueue,
+ .clo_cancel = osc_lock_cancel,
+ .clo_print = osc_lock_print,
+};
+
+int mdc_lock_init(const struct lu_env *env, struct cl_object *obj,
+ struct cl_lock *lock, const struct cl_io *io)
+{
+ struct osc_lock *ols;
+ __u32 enqflags = lock->cll_descr.cld_enq_flags;
+ __u64 flags = osc_enq2ldlm_flags(enqflags);
+
+ ENTRY;
+
+ /* Ignore AGL for Data-on-MDT, stat returns size data */
+ if ((enqflags & CEF_SPECULATIVE) != 0)
+ RETURN(0);
+
+ OBD_SLAB_ALLOC_PTR_GFP(ols, osc_lock_kmem, GFP_NOFS);
+ if (unlikely(ols == NULL))
+ RETURN(-ENOMEM);
+
+ ols->ols_state = OLS_NEW;
+ spin_lock_init(&ols->ols_lock);
+ INIT_LIST_HEAD(&ols->ols_waiting_list);
+ INIT_LIST_HEAD(&ols->ols_wait_entry);
+ INIT_LIST_HEAD(&ols->ols_nextlock_oscobj);
+ ols->ols_lockless_ops = &mdc_lock_lockless_ops;
+
+ ols->ols_flags = flags;
+ ols->ols_speculative = !!(enqflags & CEF_SPECULATIVE);
+ if (lock->cll_descr.cld_mode == CLM_GROUP)
+ ols->ols_flags |= LDLM_FL_ATOMIC_CB;
+
+ if (ols->ols_flags & LDLM_FL_HAS_INTENT) {
+ ols->ols_flags |= LDLM_FL_BLOCK_GRANTED;
+ ols->ols_glimpse = 1;
+ }
+ mdc_lock_build_einfo(env, lock, cl2osc(obj), &ols->ols_einfo);
+
+ cl_lock_slice_add(lock, &ols->ols_cl, obj, &mdc_lock_ops);
+
+ if (!(enqflags & CEF_MUST))
+ osc_lock_to_lockless(env, ols, (enqflags & CEF_NEVER));
+ if (ols->ols_locklessable && !(enqflags & CEF_DISCARD_DATA))
+ ols->ols_flags |= LDLM_FL_DENY_ON_CONTENTION;
+
+ if (io->ci_type == CIT_WRITE || cl_io_is_mkwrite(io))
+ osc_lock_set_writer(env, io, obj, ols);
+
+ LDLM_DEBUG_NOLOCK("lock %p, mdc lock %p, flags %llx\n",
+ lock, ols, ols->ols_flags);
+ RETURN(0);
}
/**
return 0;
}
+static int mdc_get_lock_handle(const struct lu_env *env, struct osc_object *osc,
+ pgoff_t index, struct lustre_handle *lh)
+{
+ struct ldlm_lock *lock;
+
+ /* find DOM lock protecting object */
+ lock = mdc_dlmlock_at_pgoff(env, osc, index,
+ OSC_DAP_FL_TEST_LOCK |
+ OSC_DAP_FL_CANCELING);
+ if (lock == NULL) {
+ struct ldlm_resource *res;
+ struct ldlm_res_id *resname;
+
+ resname = &osc_env_info(env)->oti_resname;
+ fid_build_reg_res_name(lu_object_fid(osc2lu(osc)), resname);
+ res = ldlm_resource_get(osc_export(osc)->exp_obd->obd_namespace,
+ NULL, resname, LDLM_IBITS, 0);
+ ldlm_resource_dump(D_ERROR, res);
+ libcfs_debug_dumpstack(NULL);
+ return -ENOENT;
+ } else {
+ *lh = lock->l_remote_handle;
+ LDLM_LOCK_PUT(lock);
+ }
+ return 0;
+}
+
static int mdc_io_setattr_start(const struct lu_env *env,
const struct cl_io_slice *slice)
{
struct obdo *oa = &oio->oi_oa;
struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
__u64 size = io->u.ci_setattr.sa_attr.lvb_size;
- unsigned int ia_valid = io->u.ci_setattr.sa_valid;
+ unsigned int ia_avalid = io->u.ci_setattr.sa_avalid;
+ enum op_xvalid ia_xvalid = io->u.ci_setattr.sa_xvalid;
int rc;
/* silently ignore non-truncate setattr for Data-on-MDT object */
struct ost_lvb *lvb = &io->u.ci_setattr.sa_attr;
unsigned int cl_valid = 0;
- if (ia_valid & ATTR_SIZE) {
- attr->cat_size = attr->cat_kms = size;
+ if (ia_avalid & ATTR_SIZE) {
+ attr->cat_size = size;
+ attr->cat_kms = size;
cl_valid = (CAT_SIZE | CAT_KMS);
}
- if (ia_valid & ATTR_MTIME_SET) {
+ if (ia_avalid & ATTR_MTIME_SET) {
attr->cat_mtime = lvb->lvb_mtime;
cl_valid |= CAT_MTIME;
}
- if (ia_valid & ATTR_ATIME_SET) {
+ if (ia_avalid & ATTR_ATIME_SET) {
attr->cat_atime = lvb->lvb_atime;
cl_valid |= CAT_ATIME;
}
- if (ia_valid & ATTR_CTIME_SET) {
+ if (ia_xvalid & OP_XVALID_CTIME_SET) {
attr->cat_ctime = lvb->lvb_ctime;
cl_valid |= CAT_CTIME;
}
return rc;
}
- if (!(ia_valid & ATTR_SIZE))
+ if (!(ia_avalid & ATTR_SIZE))
return 0;
memset(oa, 0, sizeof(*oa));
if (oio->oi_lockless) {
oa->o_flags = OBD_FL_SRVLOCK;
oa->o_valid |= OBD_MD_FLFLAGS;
+ } else {
+ rc = mdc_get_lock_handle(env, cl2osc(obj), CL_PAGE_EOF,
+ &oa->o_handle);
+ if (!rc)
+ oa->o_valid |= OBD_MD_FLHANDLE;
}
init_completion(&cbargs->opc_sync);
return rc;
}
+static int mdc_io_read_ahead(const struct lu_env *env,
+ const struct cl_io_slice *ios,
+ pgoff_t start, struct cl_read_ahead *ra)
+{
+ struct osc_object *osc = cl2osc(ios->cis_obj);
+ struct ldlm_lock *dlmlock;
+
+ ENTRY;
+
+ dlmlock = mdc_dlmlock_at_pgoff(env, osc, start, 0);
+ if (dlmlock == NULL)
+ RETURN(-ENODATA);
+
+ if (dlmlock->l_req_mode != LCK_PR) {
+ struct lustre_handle lockh;
+
+ ldlm_lock2handle(dlmlock, &lockh);
+ ldlm_lock_addref(&lockh, LCK_PR);
+ ldlm_lock_decref(&lockh, dlmlock->l_req_mode);
+ }
+
+ ra->cra_rpc_pages = osc_cli(osc)->cl_max_pages_per_rpc;
+ ra->cra_end_idx = CL_PAGE_EOF;
+ ra->cra_release = osc_read_ahead_release;
+ ra->cra_cbdata = dlmlock;
+
+ RETURN(0);
+}
+
+int mdc_io_fsync_start(const struct lu_env *env,
+ const struct cl_io_slice *slice)
+{
+ struct cl_io *io = slice->cis_io;
+ struct cl_fsync_io *fio = &io->u.ci_fsync;
+ struct cl_object *obj = slice->cis_obj;
+ struct osc_object *osc = cl2osc(obj);
+ int result = 0;
+
+ ENTRY;
+
+ /* a MDC lock always covers whole object, do sync for whole
+ * possible range despite of supplied start/end values.
+ */
+ result = osc_cache_writeback_range(env, osc, 0, CL_PAGE_EOF, 0,
+ fio->fi_mode == CL_FSYNC_DISCARD);
+ if (result > 0) {
+ fio->fi_nr_written += result;
+ result = 0;
+ }
+ if (fio->fi_mode == CL_FSYNC_ALL) {
+ int rc;
+
+ rc = osc_cache_wait_range(env, osc, 0, CL_PAGE_EOF);
+ if (result == 0)
+ result = rc;
+ /* Use OSC sync code because it is asynchronous.
+ * It is to be added into MDC and avoid the using of
+ * OST_SYNC at both MDC and MDT.
+ */
+ rc = osc_fsync_ost(env, osc, fio);
+ if (result == 0)
+ result = rc;
+ }
+
+ RETURN(result);
+}
+
+struct mdc_data_version_args {
+ struct osc_io *dva_oio;
+};
+
+static int
+mdc_data_version_interpret(const struct lu_env *env, struct ptlrpc_request *req,
+ void *args, int rc)
+{
+ struct mdc_data_version_args *dva = args;
+ struct osc_io *oio = dva->dva_oio;
+ const struct mdt_body *body;
+
+ ENTRY;
+ if (rc < 0)
+ GOTO(out, rc);
+
+ body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
+ if (body == NULL)
+ GOTO(out, rc = -EPROTO);
+
+ /* Prepare OBDO from mdt_body for CLIO */
+ oio->oi_oa.o_valid = body->mbo_valid;
+ oio->oi_oa.o_flags = body->mbo_flags;
+ oio->oi_oa.o_data_version = body->mbo_version;
+ oio->oi_oa.o_layout_version = body->mbo_layout_gen;
+ EXIT;
+out:
+ oio->oi_cbarg.opc_rc = rc;
+ complete(&oio->oi_cbarg.opc_sync);
+ return 0;
+}
+
+static int mdc_io_data_version_start(const struct lu_env *env,
+ const struct cl_io_slice *slice)
+{
+ struct cl_data_version_io *dv = &slice->cis_io->u.ci_data_version;
+ struct osc_io *oio = cl2osc_io(env, slice);
+ struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
+ struct osc_object *obj = cl2osc(slice->cis_obj);
+ struct obd_export *exp = osc_export(obj);
+ struct ptlrpc_request *req;
+ struct mdt_body *body;
+ struct mdc_data_version_args *dva;
+ int rc;
+
+ ENTRY;
+
+ memset(&oio->oi_oa, 0, sizeof(oio->oi_oa));
+ oio->oi_oa.o_oi.oi_fid = *lu_object_fid(osc2lu(obj));
+ oio->oi_oa.o_valid = OBD_MD_FLID;
+
+ init_completion(&cbargs->opc_sync);
+
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
+ if (req == NULL)
+ RETURN(-ENOMEM);
+
+ rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
+ if (rc < 0) {
+ ptlrpc_request_free(req);
+ RETURN(rc);
+ }
+
+ body = req_capsule_client_get(&req->rq_pill, &RMF_MDT_BODY);
+ body->mbo_fid1 = *lu_object_fid(osc2lu(obj));
+ body->mbo_valid = OBD_MD_FLID;
+ /* Indicate that data version is needed */
+ body->mbo_valid |= OBD_MD_FLDATAVERSION;
+ body->mbo_flags = 0;
+
+ if (dv->dv_flags & (LL_DV_RD_FLUSH | LL_DV_WR_FLUSH)) {
+ body->mbo_valid |= OBD_MD_FLFLAGS;
+ body->mbo_flags |= OBD_FL_SRVLOCK;
+ if (dv->dv_flags & LL_DV_WR_FLUSH)
+ body->mbo_flags |= OBD_FL_FLUSH;
+ }
+
+ req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER, 0);
+ req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER, 0);
+ ptlrpc_request_set_replen(req);
+
+ req->rq_interpret_reply = mdc_data_version_interpret;
+ dva = ptlrpc_req_async_args(dva, req);
+ dva->dva_oio = oio;
+
+ ptlrpcd_add_req(req);
+
+ RETURN(0);
+}
+
+static void mdc_io_data_version_end(const struct lu_env *env,
+ const struct cl_io_slice *slice)
+{
+ struct cl_data_version_io *dv = &slice->cis_io->u.ci_data_version;
+ struct osc_io *oio = cl2osc_io(env, slice);
+ struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
+
+ ENTRY;
+ wait_for_completion(&cbargs->opc_sync);
+
+ if (cbargs->opc_rc != 0) {
+ slice->cis_io->ci_result = cbargs->opc_rc;
+ } else {
+ slice->cis_io->ci_result = 0;
+ if (!(oio->oi_oa.o_valid &
+ (OBD_MD_LAYOUT_VERSION | OBD_MD_FLDATAVERSION)))
+ slice->cis_io->ci_result = -ENOTSUPP;
+
+ if (oio->oi_oa.o_valid & OBD_MD_LAYOUT_VERSION)
+ dv->dv_layout_version = oio->oi_oa.o_layout_version;
+ if (oio->oi_oa.o_valid & OBD_MD_FLDATAVERSION)
+ dv->dv_data_version = oio->oi_oa.o_data_version;
+ }
+
+ EXIT;
+}
+
static struct cl_io_operations mdc_io_ops = {
.op = {
[CIT_READ] = {
- .cio_iter_init = osc_io_iter_init,
- .cio_iter_fini = osc_io_iter_fini,
+ .cio_iter_init = osc_io_rw_iter_init,
+ .cio_iter_fini = osc_io_rw_iter_fini,
.cio_start = osc_io_read_start,
},
[CIT_WRITE] = {
- .cio_iter_init = osc_io_write_iter_init,
- .cio_iter_fini = osc_io_write_iter_fini,
+ .cio_iter_init = osc_io_rw_iter_init,
+ .cio_iter_fini = osc_io_rw_iter_fini,
.cio_start = osc_io_write_start,
.cio_end = osc_io_end,
},
.cio_start = mdc_io_setattr_start,
.cio_end = osc_io_setattr_end,
},
- /* no support for data version so far */
[CIT_DATA_VERSION] = {
- .cio_start = NULL,
- .cio_end = NULL,
+ .cio_start = mdc_io_data_version_start,
+ .cio_end = mdc_io_data_version_end,
},
[CIT_FAULT] = {
.cio_iter_init = osc_io_iter_init,
.cio_end = osc_io_end,
},
[CIT_FSYNC] = {
- .cio_start = osc_io_fsync_start,
+ .cio_start = mdc_io_fsync_start,
.cio_end = osc_io_fsync_end,
},
+ [CIT_LSEEK] = {
+ .cio_start = osc_io_lseek_start,
+ .cio_end = osc_io_lseek_end,
+ },
},
+ .cio_read_ahead = mdc_io_read_ahead,
.cio_submit = osc_io_submit,
.cio_commit_async = osc_io_commit_async,
};
return 0;
}
+static void mdc_build_res_name(struct osc_object *osc,
+ struct ldlm_res_id *resname)
+{
+ fid_build_reg_res_name(lu_object_fid(osc2lu(osc)), resname);
+}
+
/**
* Implementation of struct cl_req_operations::cro_attr_set() for MDC
* layer. MDC is responsible for struct obdo::o_id and struct obdo::o_seq
if (flags & OBD_MD_FLID)
attr->cra_oa->o_valid |= OBD_MD_FLID;
+
+ if (flags & OBD_MD_FLHANDLE) {
+ struct osc_page *opg;
+
+ opg = osc_cl_page_osc(attr->cra_page, cl2osc(obj));
+ if (!opg->ops_srvlock) {
+ int rc;
+
+ rc = mdc_get_lock_handle(env, cl2osc(obj),
+ osc_index(opg),
+ &attr->cra_oa->o_handle);
+ if (rc) {
+ CL_PAGE_DEBUG(D_ERROR, env, attr->cra_page,
+ "uncovered page!\n");
+ LBUG();
+ } else {
+ attr->cra_oa->o_valid |= OBD_MD_FLHANDLE;
+ }
+ }
+ }
+}
+
+static int mdc_attr_get(const struct lu_env *env, struct cl_object *obj,
+ struct cl_attr *attr)
+{
+ struct lov_oinfo *oinfo = cl2osc(obj)->oo_oinfo;
+
+ if (OST_LVB_IS_ERR(oinfo->loi_lvb.lvb_blocks))
+ return OST_LVB_GET_ERR(oinfo->loi_lvb.lvb_blocks);
+
+ return osc_attr_get(env, obj, attr);
+}
+
+static int mdc_object_ast_clear(struct ldlm_lock *lock, void *data)
+{
+ struct osc_object *osc = (struct osc_object *)data;
+ struct ost_lvb *lvb = &lock->l_ost_lvb;
+ struct lov_oinfo *oinfo;
+ ENTRY;
+
+ if (lock->l_ast_data == data) {
+ lock->l_ast_data = NULL;
+
+ LASSERT(osc != NULL);
+ LASSERT(osc->oo_oinfo != NULL);
+ LASSERT(lvb != NULL);
+
+ /* Updates lvb in lock by the cached oinfo */
+ oinfo = osc->oo_oinfo;
+
+ LDLM_DEBUG(lock, "update lock size %llu blocks %llu [cma]time: "
+ "%llu %llu %llu by oinfo size %llu blocks %llu "
+ "[cma]time %llu %llu %llu", lvb->lvb_size,
+ lvb->lvb_blocks, lvb->lvb_ctime, lvb->lvb_mtime,
+ lvb->lvb_atime, oinfo->loi_lvb.lvb_size,
+ oinfo->loi_lvb.lvb_blocks, oinfo->loi_lvb.lvb_ctime,
+ oinfo->loi_lvb.lvb_mtime, oinfo->loi_lvb.lvb_atime);
+ LASSERT(oinfo->loi_lvb.lvb_size >= oinfo->loi_kms);
+
+ cl_object_attr_lock(&osc->oo_cl);
+ memcpy(lvb, &oinfo->loi_lvb, sizeof(oinfo->loi_lvb));
+ cl_object_attr_unlock(&osc->oo_cl);
+ ldlm_clear_lvb_cached(lock);
+ }
+ RETURN(LDLM_ITER_CONTINUE);
+}
+
+int mdc_object_prune(const struct lu_env *env, struct cl_object *obj)
+{
+ struct osc_object *osc = cl2osc(obj);
+ struct ldlm_res_id *resname = &osc_env_info(env)->oti_resname;
+
+ /* DLM locks don't hold a reference of osc_object so we have to
+ * clear it before the object is being destroyed. */
+ osc_build_res_name(osc, resname);
+ ldlm_resource_iterate(osc_export(osc)->exp_obd->obd_namespace, resname,
+ mdc_object_ast_clear, osc);
+ return 0;
+}
+
+static int mdc_object_flush(const struct lu_env *env, struct cl_object *obj,
+ struct ldlm_lock *lock)
+{
+ /* if lock cancel is initiated from llite then it is combined
+ * lock with DOM bit and it may have no l_ast_data initialized yet,
+ * so init it here with given osc_object.
+ */
+ mdc_set_dom_lock_data(lock, cl2osc(obj));
+ RETURN(mdc_dlm_blocking_ast0(env, lock, LDLM_CB_CANCELING));
}
static const struct cl_object_operations mdc_ops = {
.coo_page_init = osc_page_init,
.coo_lock_init = mdc_lock_init,
.coo_io_init = mdc_io_init,
- .coo_attr_get = osc_attr_get,
+ .coo_attr_get = mdc_attr_get,
.coo_attr_update = osc_attr_update,
.coo_glimpse = osc_object_glimpse,
.coo_req_attr_set = mdc_req_attr_set,
+ .coo_prune = mdc_object_prune,
+ .coo_object_flush = mdc_object_flush
+};
+
+static const struct osc_object_operations mdc_object_ops = {
+ .oto_build_res_name = mdc_build_res_name,
+ .oto_dlmlock_at_pgoff = mdc_dlmlock_at_pgoff,
};
static int mdc_object_init(const struct lu_env *env, struct lu_object *obj,
lu_object_init(obj, NULL, dev);
osc->oo_cl.co_ops = &mdc_ops;
obj->lo_ops = &mdc_lu_obj_ops;
+ osc->oo_obj_ops = &mdc_object_ops;
osc->oo_initialized = false;
} else {
obj = NULL;
return obj;
}
-static int mdc_cl_process_config(const struct lu_env *env,
- struct lu_device *d, struct lustre_cfg *cfg)
+static int mdc_process_config(const struct lu_env *env, struct lu_device *d,
+ struct lustre_cfg *cfg)
{
- return mdc_process_config(d->ld_obd, 0, cfg);
+ size_t count = class_modify_config(cfg, PARAM_MDC,
+ &d->ld_obd->obd_kset.kobj);
+ return count > 0 ? 0 : count;
}
const struct lu_device_operations mdc_lu_ops = {
.ldo_object_alloc = mdc_object_alloc,
- .ldo_process_config = mdc_cl_process_config,
+ .ldo_process_config = mdc_process_config,
.ldo_recovery_complete = NULL,
};
git://git.whamcloud.com / fs / lustre-release.git / blobdiff