-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Implementation of cl_io for LOV layer.
*
* Author: Nikita Danilov <nikita.danilov@sun.com>
+ * Author: Jinshan Xiong <jinshan.xiong@whamcloud.com>
*/
#define DEBUG_SUBSYSTEM S_LOV
* @{
*/
-static inline void lov_sub_enter(struct lov_io_sub *sub)
+static inline struct lov_io_sub *lov_sub_alloc(struct lov_io *lio, int index)
{
- sub->sub_reenter++;
+ struct lov_io_sub *sub;
+
+ if (lio->lis_nr_subios == 0) {
+ LASSERT(lio->lis_single_subio_index == -1);
+ sub = &lio->lis_single_subio;
+ lio->lis_single_subio_index = index;
+ memset(sub, 0, sizeof(*sub));
+ } else {
+ OBD_ALLOC_PTR(sub);
+ }
+
+ if (sub) {
+ INIT_LIST_HEAD(&sub->sub_list);
+ INIT_LIST_HEAD(&sub->sub_linkage);
+ sub->sub_subio_index = index;
+ }
+
+ return sub;
}
-static inline void lov_sub_exit(struct lov_io_sub *sub)
+
+static inline void lov_sub_free(struct lov_io *lio, struct lov_io_sub *sub)
{
- sub->sub_reenter--;
+ if (sub->sub_subio_index == lio->lis_single_subio_index) {
+ LASSERT(sub == &lio->lis_single_subio);
+ lio->lis_single_subio_index = -1;
+ } else {
+ OBD_FREE_PTR(sub);
+ }
}
static void lov_io_sub_fini(const struct lu_env *env, struct lov_io *lio,
- struct lov_io_sub *sub)
-{
- ENTRY;
- if (sub->sub_io != NULL) {
- if (sub->sub_io_initialized) {
- lov_sub_enter(sub);
- cl_io_fini(sub->sub_env, sub->sub_io);
- lov_sub_exit(sub);
- sub->sub_io_initialized = 0;
- lio->lis_active_subios--;
- }
- if (sub->sub_stripe == lio->lis_single_subio_index)
- lio->lis_single_subio_index = -1;
- else if (!sub->sub_borrowed)
- OBD_FREE_PTR(sub->sub_io);
- sub->sub_io = NULL;
- }
- if (sub->sub_env != NULL && !IS_ERR(sub->sub_env)) {
- if (!sub->sub_borrowed)
- cl_env_put(sub->sub_env, &sub->sub_refcheck);
- sub->sub_env = NULL;
- }
- EXIT;
-}
-
-static void lov_io_sub_inherit(struct cl_io *io, struct lov_io *lio,
- int stripe, loff_t start, loff_t end)
-{
- struct lov_stripe_md *lsm = lov_r0(lio->lis_object)->lo_lsm;
- struct cl_io *parent = lio->lis_cl.cis_io;
-
- switch(io->ci_type) {
- case CIT_SETATTR: {
- io->u.ci_setattr.sa_attr = parent->u.ci_setattr.sa_attr;
- io->u.ci_setattr.sa_valid = parent->u.ci_setattr.sa_valid;
- io->u.ci_setattr.sa_capa = parent->u.ci_setattr.sa_capa;
- if (cl_io_is_trunc(io)) {
- loff_t new_size = parent->u.ci_setattr.sa_attr.lvb_size;
-
- new_size = lov_size_to_stripe(lsm, new_size, stripe);
- io->u.ci_setattr.sa_attr.lvb_size = new_size;
- }
- break;
- }
- case CIT_FAULT: {
- struct cl_object *obj = parent->ci_obj;
- loff_t off = cl_offset(obj, parent->u.ci_fault.ft_index);
-
- io->u.ci_fault = parent->u.ci_fault;
- off = lov_size_to_stripe(lsm, off, stripe);
- io->u.ci_fault.ft_index = cl_index(obj, off);
- break;
- }
- case CIT_READ:
- case CIT_WRITE: {
- if (cl_io_is_append(parent)) {
- io->u.ci_wr.wr_append = 1;
- } else {
- io->u.ci_rw.crw_pos = start;
- io->u.ci_rw.crw_count = end - start;
- }
- break;
- }
- default:
- break;
- }
-}
+ struct lov_io_sub *sub)
+{
+ ENTRY;
-static int lov_io_sub_init(const struct lu_env *env, struct lov_io *lio,
- struct lov_io_sub *sub)
-{
- struct lov_object *lov = lio->lis_object;
- struct lov_device *ld = lu2lov_dev(lov2cl(lov)->co_lu.lo_dev);
- struct cl_io *sub_io;
- struct cl_object *sub_obj;
- struct cl_io *io = lio->lis_cl.cis_io;
-
- int stripe = sub->sub_stripe;
- int result;
-
- LASSERT(sub->sub_io == NULL);
- LASSERT(sub->sub_env == NULL);
- LASSERT(sub->sub_stripe < lio->lis_stripe_count);
- ENTRY;
-
- result = 0;
- sub->sub_io_initialized = 0;
- sub->sub_borrowed = 0;
-
- if (lio->lis_mem_frozen) {
- LASSERT(cfs_mutex_is_locked(&ld->ld_mutex));
- sub->sub_io = &ld->ld_emrg[stripe]->emrg_subio;
- sub->sub_env = ld->ld_emrg[stripe]->emrg_env;
- sub->sub_borrowed = 1;
- } else {
- void *cookie;
-
- /* obtain new environment */
- cookie = cl_env_reenter();
- sub->sub_env = cl_env_get(&sub->sub_refcheck);
- cl_env_reexit(cookie);
- if (IS_ERR(sub->sub_env))
- result = PTR_ERR(sub->sub_env);
-
- if (result == 0) {
- /*
- * First sub-io. Use ->lis_single_subio to
- * avoid dynamic allocation.
- */
- if (lio->lis_active_subios == 0) {
- sub->sub_io = &lio->lis_single_subio;
- lio->lis_single_subio_index = stripe;
- } else {
- OBD_ALLOC_PTR(sub->sub_io);
- if (sub->sub_io == NULL)
- result = -ENOMEM;
- }
- }
- }
-
- if (result == 0) {
- sub_obj = lovsub2cl(lov_r0(lov)->lo_sub[stripe]);
- sub_io = sub->sub_io;
-
- sub_io->ci_obj = sub_obj;
- sub_io->ci_result = 0;
-
- sub_io->ci_parent = io;
- sub_io->ci_lockreq = io->ci_lockreq;
- sub_io->ci_type = io->ci_type;
- sub_io->ci_no_srvlock = io->ci_no_srvlock;
-
- lov_sub_enter(sub);
- result = cl_io_sub_init(sub->sub_env, sub_io,
- io->ci_type, sub_obj);
- lov_sub_exit(sub);
- if (result >= 0) {
- lio->lis_active_subios++;
- sub->sub_io_initialized = 1;
- result = 0;
- }
- }
- if (result != 0)
- lov_io_sub_fini(env, lio, sub);
- RETURN(result);
+ cl_io_fini(sub->sub_env, &sub->sub_io);
+
+ if (sub->sub_env && !IS_ERR(sub->sub_env)) {
+ cl_env_put(sub->sub_env, &sub->sub_refcheck);
+ sub->sub_env = NULL;
+ }
+ EXIT;
}
-struct lov_io_sub *lov_sub_get(const struct lu_env *env,
- struct lov_io *lio, int stripe)
+static inline bool
+is_index_within_mirror(struct lov_object *lov, int index, int mirror_index)
{
- int rc;
- struct lov_io_sub *sub = &lio->lis_subs[stripe];
+ struct lov_layout_composite *comp = &lov->u.composite;
+ struct lov_mirror_entry *lre = &comp->lo_mirrors[mirror_index];
- LASSERT(stripe < lio->lis_stripe_count);
- ENTRY;
+ return (index >= lre->lre_start && index <= lre->lre_end);
+}
- if (!sub->sub_io_initialized) {
- sub->sub_stripe = stripe;
- rc = lov_io_sub_init(env, lio, sub);
- } else
- rc = 0;
- if (rc == 0)
- lov_sub_enter(sub);
- else
- sub = ERR_PTR(rc);
- RETURN(sub);
+static int lov_io_sub_init(const struct lu_env *env, struct lov_io *lio,
+ struct lov_io_sub *sub)
+{
+ struct lov_object *lov = lio->lis_object;
+ struct cl_io *sub_io;
+ struct cl_object *sub_obj;
+ struct cl_io *io = lio->lis_cl.cis_io;
+ int index = lov_comp_entry(sub->sub_subio_index);
+ int stripe = lov_comp_stripe(sub->sub_subio_index);
+ int result = 0;
+ LASSERT(sub->sub_env == NULL);
+ ENTRY;
+
+ if (unlikely(!lov_r0(lov, index)->lo_sub ||
+ !lov_r0(lov, index)->lo_sub[stripe]))
+ RETURN(-EIO);
+
+ LASSERTF(is_index_within_mirror(lov, index, lio->lis_mirror_index),
+ DFID "iot = %d, index = %d, mirror = %d\n",
+ PFID(lu_object_fid(lov2lu(lov))), io->ci_type, index,
+ lio->lis_mirror_index);
+
+ /* obtain new environment */
+ sub->sub_env = cl_env_get(&sub->sub_refcheck);
+ if (IS_ERR(sub->sub_env)) {
+ result = PTR_ERR(sub->sub_env);
+ RETURN(result);
+ }
+
+ sub_obj = lovsub2cl(lov_r0(lov, index)->lo_sub[stripe]);
+ sub_io = &sub->sub_io;
+
+ sub_io->ci_obj = sub_obj;
+ sub_io->ci_result = 0;
+
+ sub_io->ci_parent = io;
+ sub_io->ci_lockreq = io->ci_lockreq;
+ sub_io->ci_type = io->ci_type;
+ sub_io->ci_no_srvlock = io->ci_no_srvlock;
+ sub_io->ci_noatime = io->ci_noatime;
+ sub_io->ci_async_readahead = io->ci_async_readahead;
+ sub_io->ci_lock_no_expand = io->ci_lock_no_expand;
+ sub_io->ci_ndelay = io->ci_ndelay;
+ sub_io->ci_layout_version = io->ci_layout_version;
+
+ result = cl_io_sub_init(sub->sub_env, sub_io, io->ci_type, sub_obj);
+
+ if (result < 0)
+ lov_io_sub_fini(env, lio, sub);
+
+ RETURN(result);
}
-void lov_sub_put(struct lov_io_sub *sub)
+struct lov_io_sub *lov_sub_get(const struct lu_env *env,
+ struct lov_io *lio, int index)
{
- lov_sub_exit(sub);
+ struct lov_io_sub *sub;
+ int rc = 0;
+
+ ENTRY;
+
+ list_for_each_entry(sub, &lio->lis_subios, sub_list) {
+ if (sub->sub_subio_index == index) {
+ rc = 1;
+ break;
+ }
+ }
+
+ if (rc == 0) {
+ sub = lov_sub_alloc(lio, index);
+ if (!sub)
+ GOTO(out, rc = -ENOMEM);
+
+ rc = lov_io_sub_init(env, lio, sub);
+ if (rc < 0) {
+ lov_sub_free(lio, sub);
+ GOTO(out, rc);
+ }
+
+ list_add_tail(&sub->sub_list, &lio->lis_subios);
+ lio->lis_nr_subios++;
+ }
+out:
+ if (rc < 0)
+ sub = ERR_PTR(rc);
+ RETURN(sub);
}
/*****************************************************************************
* Lov io operations.
*
*/
-
-static int lov_page_stripe(const struct cl_page *page)
+static int lov_io_subio_init(const struct lu_env *env, struct lov_io *lio,
+ struct cl_io *io)
{
- struct lovsub_object *subobj;
+ ENTRY;
- ENTRY;
- subobj = lu2lovsub(
- lu_object_locate(page->cp_child->cp_obj->co_lu.lo_header,
- &lovsub_device_type));
- LASSERT(subobj != NULL);
- RETURN(subobj->lso_index);
-}
+ LASSERT(lio->lis_object != NULL);
-struct lov_io_sub *lov_page_subio(const struct lu_env *env, struct lov_io *lio,
- const struct cl_page_slice *slice)
-{
- struct lov_stripe_md *lsm = lov_r0(lio->lis_object)->lo_lsm;
- struct cl_page *page = slice->cpl_page;
- int stripe;
+ INIT_LIST_HEAD(&lio->lis_subios);
+ lio->lis_single_subio_index = -1;
+ lio->lis_nr_subios = 0;
- LASSERT(lio->lis_cl.cis_io != NULL);
- LASSERT(cl2lov(slice->cpl_obj) == lio->lis_object);
- LASSERT(lsm != NULL);
- LASSERT(lio->lis_nr_subios > 0);
- ENTRY;
+ RETURN(0);
+}
- stripe = lov_page_stripe(page);
- RETURN(lov_sub_get(env, lio, stripe));
+/**
+ * Decide if it will need write intent RPC
+ */
+static int lov_io_mirror_write_intent(struct lov_io *lio,
+ struct lov_object *obj, struct cl_io *io)
+{
+ struct lov_layout_composite *comp = &obj->u.composite;
+ struct lu_extent *ext = &io->ci_write_intent;
+ struct lov_mirror_entry *lre;
+ struct lov_mirror_entry *primary;
+ struct lov_layout_entry *lle;
+ size_t count = 0;
+ ENTRY;
+
+ *ext = (typeof(*ext)) { lio->lis_pos, lio->lis_endpos };
+ io->ci_need_write_intent = 0;
+
+ if (!(io->ci_type == CIT_WRITE || cl_io_is_trunc(io) ||
+ cl_io_is_mkwrite(io)))
+ RETURN(0);
+
+ /*
+ * FLR: check if it needs to send a write intent RPC to server.
+ * Writing to sync_pending file needs write intent RPC to change
+ * the file state back to write_pending, so that the layout version
+ * can be increased when the state changes to sync_pending at a later
+ * time. Otherwise there exists a chance that an evicted client may
+ * dirty the file data while resync client is working on it.
+ * Designated I/O is allowed for resync workload.
+ */
+ if (lov_flr_state(obj) == LCM_FL_RDONLY ||
+ (lov_flr_state(obj) == LCM_FL_SYNC_PENDING &&
+ io->ci_designated_mirror == 0)) {
+ io->ci_need_write_intent = 1;
+ RETURN(0);
+ }
+
+ LASSERT((lov_flr_state(obj) == LCM_FL_WRITE_PENDING));
+ LASSERT(comp->lo_preferred_mirror >= 0);
+
+ /*
+ * need to iterate all components to see if there are
+ * multiple components covering the writing component
+ */
+ primary = &comp->lo_mirrors[comp->lo_preferred_mirror];
+ LASSERT(!primary->lre_stale);
+ lov_foreach_mirror_layout_entry(obj, lle, primary) {
+ LASSERT(lle->lle_valid);
+ if (!lu_extent_is_overlapped(ext, lle->lle_extent))
+ continue;
+
+ ext->e_start = MIN(ext->e_start, lle->lle_extent->e_start);
+ ext->e_end = MAX(ext->e_end, lle->lle_extent->e_end);
+ ++count;
+ }
+ if (count == 0) {
+ CERROR(DFID ": cannot find any valid components covering "
+ "file extent "DEXT", mirror: %d\n",
+ PFID(lu_object_fid(lov2lu(obj))), PEXT(ext),
+ primary->lre_mirror_id);
+ RETURN(-EIO);
+ }
+
+ count = 0;
+ lov_foreach_mirror_entry(obj, lre) {
+ if (lre == primary)
+ continue;
+
+ lov_foreach_mirror_layout_entry(obj, lle, lre) {
+ if (!lle->lle_valid)
+ continue;
+
+ if (lu_extent_is_overlapped(ext, lle->lle_extent)) {
+ ++count;
+ break;
+ }
+ }
+ }
+
+ CDEBUG(D_VFSTRACE, DFID "there are %zd components to be staled to "
+ "modify file extent "DEXT", iot: %d\n",
+ PFID(lu_object_fid(lov2lu(obj))), count, PEXT(ext), io->ci_type);
+
+ io->ci_need_write_intent = count > 0;
+
+ RETURN(0);
}
+static int lov_io_mirror_init(struct lov_io *lio, struct lov_object *obj,
+ struct cl_io *io)
+{
+ struct lov_layout_composite *comp = &obj->u.composite;
+ int index;
+ int i;
+ int result;
+ ENTRY;
+
+ if (!lov_is_flr(obj)) {
+ LASSERT(comp->lo_preferred_mirror == 0);
+ lio->lis_mirror_index = comp->lo_preferred_mirror;
+ io->ci_ndelay = 0;
+ RETURN(0);
+ }
+
+ /* transfer the layout version for verification */
+ if (io->ci_layout_version == 0)
+ io->ci_layout_version = obj->lo_lsm->lsm_layout_gen;
+
+ /* find the corresponding mirror for designated mirror IO */
+ if (io->ci_designated_mirror > 0) {
+ struct lov_mirror_entry *entry;
+
+ LASSERT(!io->ci_ndelay);
+
+ CDEBUG(D_LAYOUT, "designated I/O mirror state: %d\n",
+ lov_flr_state(obj));
+
+ if ((cl_io_is_trunc(io) || io->ci_type == CIT_WRITE) &&
+ (io->ci_layout_version != obj->lo_lsm->lsm_layout_gen)) {
+ /*
+ * For resync I/O, the ci_layout_version was the layout
+ * version when resync starts. If it doesn't match the
+ * current object layout version, it means the layout
+ * has been changed
+ */
+ RETURN(-ESTALE);
+ }
+
+ io->ci_layout_version |= LU_LAYOUT_RESYNC;
+
+ index = 0;
+ lio->lis_mirror_index = -1;
+ lov_foreach_mirror_entry(obj, entry) {
+ if (entry->lre_mirror_id ==
+ io->ci_designated_mirror) {
+ lio->lis_mirror_index = index;
+ break;
+ }
+
+ index++;
+ }
+
+ RETURN(lio->lis_mirror_index < 0 ? -EINVAL : 0);
+ }
+
+ result = lov_io_mirror_write_intent(lio, obj, io);
+ if (result)
+ RETURN(result);
+
+ if (io->ci_need_write_intent) {
+ CDEBUG(D_VFSTRACE, DFID " need write intent for [%llu, %llu)\n",
+ PFID(lu_object_fid(lov2lu(obj))),
+ lio->lis_pos, lio->lis_endpos);
+
+ if (cl_io_is_trunc(io)) {
+ /**
+ * for truncate, we uses [size, EOF) to judge whether
+ * a write intent needs to be send, but we need to
+ * restore the write extent to [0, size).
+ */
+ io->ci_write_intent.e_start = 0;
+ io->ci_write_intent.e_end =
+ io->u.ci_setattr.sa_attr.lvb_size;
+ }
+ /* stop cl_io_init() loop */
+ RETURN(1);
+ }
+
+ if (io->ci_ndelay_tried == 0 || /* first time to try */
+ /* reset the mirror index if layout has changed */
+ lio->lis_mirror_layout_gen != obj->lo_lsm->lsm_layout_gen) {
+ lio->lis_mirror_layout_gen = obj->lo_lsm->lsm_layout_gen;
+ index = lio->lis_mirror_index = comp->lo_preferred_mirror;
+ } else {
+ index = lio->lis_mirror_index;
+ LASSERT(index >= 0);
+
+ /* move mirror index to the next one */
+ index = (index + 1) % comp->lo_mirror_count;
+ }
+
+ for (i = 0; i < comp->lo_mirror_count; i++) {
+ struct lu_extent ext = { .e_start = lio->lis_pos,
+ .e_end = lio->lis_pos + 1 };
+ struct lov_mirror_entry *lre;
+ struct lov_layout_entry *lle;
+ bool found = false;
+
+ lre = &comp->lo_mirrors[(index + i) % comp->lo_mirror_count];
+ if (!lre->lre_valid)
+ continue;
+
+ lov_foreach_mirror_layout_entry(obj, lle, lre) {
+ if (!lle->lle_valid)
+ continue;
+
+ if (lu_extent_is_overlapped(&ext, lle->lle_extent)) {
+ found = true;
+ break;
+ }
+ }
+
+ if (found) {
+ index = (index + i) % comp->lo_mirror_count;
+ break;
+ }
+ }
+ if (i == comp->lo_mirror_count) {
+ CERROR(DFID": failed to find a component covering "
+ "I/O region at %llu\n",
+ PFID(lu_object_fid(lov2lu(obj))), lio->lis_pos);
+
+ dump_lsm(D_ERROR, obj->lo_lsm);
+
+ RETURN(-EIO);
+ }
+
+ CDEBUG(D_VFSTRACE, DFID ": flr state: %d, move mirror from %d to %d, "
+ "have retried: %d, mirror count: %d\n",
+ PFID(lu_object_fid(lov2lu(obj))), lov_flr_state(obj),
+ lio->lis_mirror_index, index, io->ci_ndelay_tried,
+ comp->lo_mirror_count);
+
+ lio->lis_mirror_index = index;
+
+ /*
+ * FLR: if all mirrors have been tried once, most likely the network
+ * of this client has been partitioned. We should relinquish CPU for
+ * a while before trying again.
+ */
+ ++io->ci_ndelay_tried;
+ if (io->ci_ndelay && io->ci_ndelay_tried >= comp->lo_mirror_count) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(cfs_time_seconds(1)); /* 10ms */
+ if (signal_pending(current))
+ RETURN(-EINTR);
+
+ /* reset retry counter */
+ io->ci_ndelay_tried = 1;
+ }
+
+ CDEBUG(D_VFSTRACE, "use %sdelayed RPC state for this IO\n",
+ io->ci_ndelay ? "non-" : "");
+
+ RETURN(0);
+}
-static int lov_io_subio_init(const struct lu_env *env, struct lov_io *lio,
- struct cl_io *io)
+static int lov_io_slice_init(struct lov_io *lio,
+ struct lov_object *obj, struct cl_io *io)
{
- struct lov_object *lov = lio->lis_object;
- struct lov_stripe_md *lsm = lov_r0(lov)->lo_lsm;
- int result;
-
- LASSERT(lio->lis_object != NULL);
- ENTRY;
-
- /*
- * Need to be optimized, we can't afford to allocate a piece of memory
- * when writing a page. -jay
- */
- OBD_ALLOC(lio->lis_subs,
- lsm->lsm_stripe_count * sizeof lio->lis_subs[0]);
- if (lio->lis_subs != NULL) {
- lio->lis_nr_subios = lio->lis_stripe_count;
- lio->lis_single_subio_index = -1;
- lio->lis_active_subios = 0;
- result = 0;
- } else
- result = -ENOMEM;
- RETURN(result);
-}
-
-static void lov_io_slice_init(struct lov_io *lio,
- struct lov_object *obj, struct cl_io *io)
-{
- struct lov_stripe_md *lsm = lov_r0(obj)->lo_lsm;
-
- LASSERT(lsm != NULL);
- ENTRY;
-
- io->ci_result = 0;
- lio->lis_object = obj;
- lio->lis_stripe_count = lsm->lsm_stripe_count;
-
- switch (io->ci_type) {
- case CIT_READ:
- case CIT_WRITE:
- lio->lis_pos = io->u.ci_rw.crw_pos;
- lio->lis_endpos = io->u.ci_rw.crw_pos + io->u.ci_rw.crw_count;
- lio->lis_io_endpos = lio->lis_endpos;
- if (cl_io_is_append(io)) {
- LASSERT(io->ci_type == CIT_WRITE);
- lio->lis_pos = 0;
- lio->lis_endpos = OBD_OBJECT_EOF;
- }
- break;
-
- case CIT_SETATTR:
- if (cl_io_is_trunc(io))
- lio->lis_pos = io->u.ci_setattr.sa_attr.lvb_size;
- else
- lio->lis_pos = 0;
- lio->lis_endpos = OBD_OBJECT_EOF;
- break;
-
- case CIT_FAULT: {
- pgoff_t index = io->u.ci_fault.ft_index;
- lio->lis_pos = cl_offset(io->ci_obj, index);
- lio->lis_endpos = cl_offset(io->ci_obj, index + 1);
- break;
- }
-
- case CIT_MISC:
- lio->lis_pos = 0;
- lio->lis_endpos = OBD_OBJECT_EOF;
- break;
-
- default:
- LBUG();
- }
-
- EXIT;
+ int index;
+ int result = 0;
+ ENTRY;
+
+ io->ci_result = 0;
+ lio->lis_object = obj;
+
+ LASSERT(obj->lo_lsm != NULL);
+
+ switch (io->ci_type) {
+ case CIT_READ:
+ case CIT_WRITE:
+ lio->lis_pos = io->u.ci_rw.crw_pos;
+ lio->lis_endpos = io->u.ci_rw.crw_pos + io->u.ci_rw.crw_count;
+ lio->lis_io_endpos = lio->lis_endpos;
+ if (cl_io_is_append(io)) {
+ LASSERT(io->ci_type == CIT_WRITE);
+
+ /*
+ * If there is LOV EA hole, then we may cannot locate
+ * the current file-tail exactly.
+ */
+ if (unlikely(obj->lo_lsm->lsm_entries[0]->lsme_pattern &
+ LOV_PATTERN_F_HOLE))
+ GOTO(out, result = -EIO);
+
+ lio->lis_pos = 0;
+ lio->lis_endpos = OBD_OBJECT_EOF;
+ }
+ break;
+
+ case CIT_SETATTR:
+ if (cl_io_is_trunc(io))
+ lio->lis_pos = io->u.ci_setattr.sa_attr.lvb_size;
+ else
+ lio->lis_pos = 0;
+ lio->lis_endpos = OBD_OBJECT_EOF;
+ break;
+
+ case CIT_DATA_VERSION:
+ lio->lis_pos = 0;
+ lio->lis_endpos = OBD_OBJECT_EOF;
+ break;
+
+ case CIT_FAULT: {
+ pgoff_t index = io->u.ci_fault.ft_index;
+
+ lio->lis_pos = cl_offset(io->ci_obj, index);
+ lio->lis_endpos = cl_offset(io->ci_obj, index + 1);
+ break;
+ }
+
+ case CIT_FSYNC: {
+ lio->lis_pos = io->u.ci_fsync.fi_start;
+ lio->lis_endpos = io->u.ci_fsync.fi_end;
+ break;
+ }
+
+ case CIT_LADVISE: {
+ lio->lis_pos = io->u.ci_ladvise.li_start;
+ lio->lis_endpos = io->u.ci_ladvise.li_end;
+ break;
+ }
+
+ case CIT_GLIMPSE:
+ lio->lis_pos = 0;
+ lio->lis_endpos = OBD_OBJECT_EOF;
+
+ if (lov_flr_state(obj) == LCM_FL_RDONLY &&
+ !OBD_FAIL_CHECK(OBD_FAIL_FLR_GLIMPSE_IMMUTABLE))
+ /* SoM is accurate, no need glimpse */
+ GOTO(out, result = 1);
+ break;
+
+ case CIT_MISC:
+ lio->lis_pos = 0;
+ lio->lis_endpos = OBD_OBJECT_EOF;
+ break;
+
+ default:
+ LBUG();
+ }
+
+ result = lov_io_mirror_init(lio, obj, io);
+ if (result)
+ GOTO(out, result);
+
+ /* check if it needs to instantiate layout */
+ if (!(io->ci_type == CIT_WRITE || cl_io_is_mkwrite(io) ||
+ (cl_io_is_trunc(io) && io->u.ci_setattr.sa_attr.lvb_size > 0)))
+ GOTO(out, result = 0);
+
+ /*
+ * for truncate, it only needs to instantiate the components
+ * before the truncated size.
+ */
+ if (cl_io_is_trunc(io)) {
+ io->ci_write_intent.e_start = 0;
+ /* for writes, e_end is endpos, the location of the file
+ * pointer after the write is completed, so it is not accessed.
+ * For truncate, 'end' is the size, and *is* acccessed.
+ * In other words, writes are [start, end), but truncate is
+ * [start, size], where both are included. So add 1 to the
+ * size when creating the write intent to account for this.
+ */
+ io->ci_write_intent.e_end =
+ io->u.ci_setattr.sa_attr.lvb_size + 1;
+ } else {
+ io->ci_write_intent.e_start = lio->lis_pos;
+ io->ci_write_intent.e_end = lio->lis_endpos;
+ }
+
+ index = 0;
+ lov_foreach_io_layout(index, lio, &io->ci_write_intent) {
+ if (!lsm_entry_inited(obj->lo_lsm, index)) {
+ io->ci_need_write_intent = 1;
+ break;
+ }
+ }
+
+ if (io->ci_need_write_intent && io->ci_designated_mirror > 0) {
+ /*
+ * REINT_SYNC RPC has already tried to instantiate all of the
+ * components involved, obviously it didn't succeed. Skip this
+ * mirror for now. The server won't be able to figure out
+ * which mirror it should instantiate components
+ */
+ CERROR(DFID": trying to instantiate components for designated "
+ "I/O, file state: %d\n",
+ PFID(lu_object_fid(lov2lu(obj))), lov_flr_state(obj));
+
+ io->ci_need_write_intent = 0;
+ GOTO(out, result = -EIO);
+ }
+
+ if (io->ci_need_write_intent)
+ GOTO(out, result = 1);
+
+ EXIT;
+
+out:
+ return result;
}
static void lov_io_fini(const struct lu_env *env, const struct cl_io_slice *ios)
{
- struct lov_io *lio = cl2lov_io(env, ios);
- int i;
+ struct lov_io *lio = cl2lov_io(env, ios);
+ struct lov_object *lov = cl2lov(ios->cis_obj);
+
+ ENTRY;
+
+ LASSERT(list_empty(&lio->lis_active));
+
+ while (!list_empty(&lio->lis_subios)) {
+ struct lov_io_sub *sub = list_entry(lio->lis_subios.next,
+ struct lov_io_sub,
+ sub_list);
+
+ list_del_init(&sub->sub_list);
+ lio->lis_nr_subios--;
+
+ lov_io_sub_fini(env, lio, sub);
+ lov_sub_free(lio, sub);
+ }
+ LASSERT(lio->lis_nr_subios == 0);
+
+ LASSERT(atomic_read(&lov->lo_active_ios) > 0);
+ if (atomic_dec_and_test(&lov->lo_active_ios))
+ wake_up_all(&lov->lo_waitq);
+ EXIT;
+}
- ENTRY;
- if (lio->lis_subs != NULL) {
- for (i = 0; i < lio->lis_nr_subios; i++)
- lov_io_sub_fini(env, lio, &lio->lis_subs[i]);
- OBD_FREE(lio->lis_subs,
- lio->lis_nr_subios * sizeof lio->lis_subs[0]);
- lio->lis_nr_subios = 0;
- }
- EXIT;
+static void lov_io_sub_inherit(struct lov_io_sub *sub, struct lov_io *lio,
+ loff_t start, loff_t end)
+{
+ struct cl_io *io = &sub->sub_io;
+ struct lov_stripe_md *lsm = lio->lis_object->lo_lsm;
+ struct cl_io *parent = lio->lis_cl.cis_io;
+ int index = lov_comp_entry(sub->sub_subio_index);
+ int stripe = lov_comp_stripe(sub->sub_subio_index);
+
+ switch (io->ci_type) {
+ case CIT_SETATTR: {
+ io->u.ci_setattr.sa_attr = parent->u.ci_setattr.sa_attr;
+ io->u.ci_setattr.sa_attr_flags =
+ parent->u.ci_setattr.sa_attr_flags;
+ io->u.ci_setattr.sa_avalid = parent->u.ci_setattr.sa_avalid;
+ io->u.ci_setattr.sa_xvalid = parent->u.ci_setattr.sa_xvalid;
+ io->u.ci_setattr.sa_stripe_index = stripe;
+ io->u.ci_setattr.sa_parent_fid =
+ parent->u.ci_setattr.sa_parent_fid;
+ if (cl_io_is_trunc(io)) {
+ loff_t new_size = parent->u.ci_setattr.sa_attr.lvb_size;
+
+ new_size = lov_size_to_stripe(lsm, index, new_size,
+ stripe);
+ io->u.ci_setattr.sa_attr.lvb_size = new_size;
+ }
+ lov_lsm2layout(lsm, lsm->lsm_entries[index],
+ &io->u.ci_setattr.sa_layout);
+ break;
+ }
+ case CIT_DATA_VERSION: {
+ io->u.ci_data_version.dv_data_version = 0;
+ io->u.ci_data_version.dv_flags =
+ parent->u.ci_data_version.dv_flags;
+ break;
+ }
+ case CIT_FAULT: {
+ struct cl_object *obj = parent->ci_obj;
+ loff_t off = cl_offset(obj, parent->u.ci_fault.ft_index);
+
+ io->u.ci_fault = parent->u.ci_fault;
+ off = lov_size_to_stripe(lsm, index, off, stripe);
+ io->u.ci_fault.ft_index = cl_index(obj, off);
+ break;
+ }
+ case CIT_FSYNC: {
+ io->u.ci_fsync.fi_start = start;
+ io->u.ci_fsync.fi_end = end;
+ io->u.ci_fsync.fi_fid = parent->u.ci_fsync.fi_fid;
+ io->u.ci_fsync.fi_mode = parent->u.ci_fsync.fi_mode;
+ break;
+ }
+ case CIT_READ:
+ case CIT_WRITE: {
+ io->u.ci_wr.wr_sync = cl_io_is_sync_write(parent);
+ if (cl_io_is_append(parent)) {
+ io->u.ci_wr.wr_append = 1;
+ } else {
+ io->u.ci_rw.crw_pos = start;
+ io->u.ci_rw.crw_count = end - start;
+ }
+ break;
+ }
+ case CIT_LADVISE: {
+ io->u.ci_ladvise.li_start = start;
+ io->u.ci_ladvise.li_end = end;
+ io->u.ci_ladvise.li_fid = parent->u.ci_ladvise.li_fid;
+ io->u.ci_ladvise.li_advice = parent->u.ci_ladvise.li_advice;
+ io->u.ci_ladvise.li_flags = parent->u.ci_ladvise.li_flags;
+ break;
+ }
+ case CIT_GLIMPSE:
+ case CIT_MISC:
+ default:
+ break;
+ }
}
-static obd_off lov_offset_mod(obd_off val, int delta)
+static loff_t lov_offset_mod(loff_t val, int delta)
{
- if (val != OBD_OBJECT_EOF)
- val += delta;
- return val;
+ if (val != OBD_OBJECT_EOF)
+ val += delta;
+ return val;
}
static int lov_io_iter_init(const struct lu_env *env,
- const struct cl_io_slice *ios)
-{
- struct lov_io *lio = cl2lov_io(env, ios);
- struct lov_stripe_md *lsm = lov_r0(lio->lis_object)->lo_lsm;
- struct lov_io_sub *sub;
- obd_off endpos;
- obd_off start;
- obd_off end;
- int stripe;
- int rc = 0;
-
- ENTRY;
- endpos = lov_offset_mod(lio->lis_endpos, -1);
- for (stripe = 0; stripe < lio->lis_stripe_count; stripe++) {
- if (!lov_stripe_intersects(lsm, stripe, lio->lis_pos,
- endpos, &start, &end))
- continue;
-
- end = lov_offset_mod(end, +1);
- sub = lov_sub_get(env, lio, stripe);
- if (!IS_ERR(sub)) {
- lov_io_sub_inherit(sub->sub_io, lio, stripe,
- start, end);
- rc = cl_io_iter_init(sub->sub_env, sub->sub_io);
- lov_sub_put(sub);
- CDEBUG(D_VFSTRACE, "shrink: %i ["LPU64", "LPU64")\n",
- stripe, start, end);
- } else
- rc = PTR_ERR(sub);
-
- if (!rc)
- cfs_list_add_tail(&sub->sub_linkage, &lio->lis_active);
- else
- break;
- }
- RETURN(rc);
+ const struct cl_io_slice *ios)
+{
+ struct lov_io *lio = cl2lov_io(env, ios);
+ struct lov_stripe_md *lsm = lio->lis_object->lo_lsm;
+ struct lov_io_sub *sub;
+ struct lu_extent ext;
+ int index;
+ int rc = 0;
+
+ ENTRY;
+
+ ext.e_start = lio->lis_pos;
+ ext.e_end = lio->lis_endpos;
+
+ lov_foreach_io_layout(index, lio, &ext) {
+ struct lov_layout_entry *le = lov_entry(lio->lis_object, index);
+ struct lov_layout_raid0 *r0 = &le->lle_raid0;
+ u64 start;
+ u64 end;
+ int stripe;
+
+ CDEBUG(D_VFSTRACE, "component[%d] flags %#x\n",
+ index, lsm->lsm_entries[index]->lsme_flags);
+ if (!lsm_entry_inited(lsm, index)) {
+ /*
+ * Read from uninitialized components should return
+ * zero filled pages.
+ */
+ continue;
+ }
+
+ if (!le->lle_valid && !ios->cis_io->ci_designated_mirror) {
+ CERROR("I/O to invalid component: %d, mirror: %d\n",
+ index, lio->lis_mirror_index);
+ RETURN(-EIO);
+ }
+
+ for (stripe = 0; stripe < r0->lo_nr; stripe++) {
+ if (!lov_stripe_intersects(lsm, index, stripe,
+ &ext, &start, &end))
+ continue;
+
+ if (unlikely(!r0->lo_sub[stripe])) {
+ if (ios->cis_io->ci_type == CIT_READ ||
+ ios->cis_io->ci_type == CIT_WRITE ||
+ ios->cis_io->ci_type == CIT_FAULT)
+ RETURN(-EIO);
+
+ continue;
+ }
+
+ end = lov_offset_mod(end, 1);
+ sub = lov_sub_get(env, lio,
+ lov_comp_index(index, stripe));
+ if (IS_ERR(sub)) {
+ rc = PTR_ERR(sub);
+ break;
+ }
+
+ lov_io_sub_inherit(sub, lio, start, end);
+ rc = cl_io_iter_init(sub->sub_env, &sub->sub_io);
+ if (rc != 0)
+ cl_io_iter_fini(sub->sub_env, &sub->sub_io);
+ if (rc != 0)
+ break;
+
+ CDEBUG(D_VFSTRACE, "shrink: %d [%llu, %llu)\n",
+ stripe, start, end);
+
+ list_add_tail(&sub->sub_linkage, &lio->lis_active);
+ }
+ if (rc != 0)
+ break;
+ }
+ RETURN(rc);
}
static int lov_io_rw_iter_init(const struct lu_env *env,
- const struct cl_io_slice *ios)
-{
- struct lov_io *lio = cl2lov_io(env, ios);
- struct cl_io *io = ios->cis_io;
- struct lov_stripe_md *lsm = lov_r0(cl2lov(ios->cis_obj))->lo_lsm;
- loff_t start = io->u.ci_rw.crw_pos;
- loff_t next;
- unsigned long ssize = lsm->lsm_stripe_size;
-
- LASSERT(io->ci_type == CIT_READ || io->ci_type == CIT_WRITE);
- ENTRY;
-
- /* fast path for common case. */
- if (lio->lis_nr_subios != 1 && !cl_io_is_append(io)) {
-
- do_div(start, ssize);
- next = (start + 1) * ssize;
- if (next <= start * ssize)
- next = ~0ull;
-
- io->ci_continue = next < lio->lis_io_endpos;
- io->u.ci_rw.crw_count = min_t(loff_t, lio->lis_io_endpos,
- next) - io->u.ci_rw.crw_pos;
- lio->lis_pos = io->u.ci_rw.crw_pos;
- lio->lis_endpos = io->u.ci_rw.crw_pos + io->u.ci_rw.crw_count;
- CDEBUG(D_VFSTRACE, "stripe: "LPU64" chunk: ["LPU64", "LPU64") "LPU64"\n",
- (__u64)start, lio->lis_pos, lio->lis_endpos,
- (__u64)lio->lis_io_endpos);
- }
- /*
- * XXX The following call should be optimized: we know, that
- * [lio->lis_pos, lio->lis_endpos) intersects with exactly one stripe.
- */
- RETURN(lov_io_iter_init(env, ios));
+ const struct cl_io_slice *ios)
+{
+ struct lov_io *lio = cl2lov_io(env, ios);
+ struct cl_io *io = ios->cis_io;
+ struct lov_stripe_md_entry *lse;
+ loff_t start = io->u.ci_rw.crw_pos;
+ loff_t next;
+ int index;
+
+ LASSERT(io->ci_type == CIT_READ || io->ci_type == CIT_WRITE);
+ ENTRY;
+
+ if (cl_io_is_append(io))
+ RETURN(lov_io_iter_init(env, ios));
+
+ index = lov_io_layout_at(lio, io->u.ci_rw.crw_pos);
+ if (index < 0) { /* non-existing layout component */
+ if (io->ci_type == CIT_READ) {
+ /*
+ * TODO: it needs to detect the next component and
+ * then set the next pos
+ */
+ io->ci_continue = 0;
+
+ RETURN(lov_io_iter_init(env, ios));
+ }
+
+ RETURN(-ENODATA);
+ }
+
+ if (!lov_entry(lio->lis_object, index)->lle_valid &&
+ !io->ci_designated_mirror)
+ RETURN(io->ci_type == CIT_READ ? -EAGAIN : -EIO);
+
+ lse = lov_lse(lio->lis_object, index);
+
+ next = MAX_LFS_FILESIZE;
+ if (lse->lsme_stripe_count > 1) {
+ unsigned long ssize = lse->lsme_stripe_size;
+
+ lov_do_div64(start, ssize);
+ next = (start + 1) * ssize;
+ if (next <= start * ssize)
+ next = MAX_LFS_FILESIZE;
+ }
+
+ LASSERTF(io->u.ci_rw.crw_pos >= lse->lsme_extent.e_start,
+ "pos %lld, [%lld, %lld)\n", io->u.ci_rw.crw_pos,
+ lse->lsme_extent.e_start, lse->lsme_extent.e_end);
+ next = min_t(__u64, next, lse->lsme_extent.e_end);
+ next = min_t(loff_t, next, lio->lis_io_endpos);
+
+ io->ci_continue = next < lio->lis_io_endpos;
+ io->u.ci_rw.crw_count = next - io->u.ci_rw.crw_pos;
+ lio->lis_pos = io->u.ci_rw.crw_pos;
+ lio->lis_endpos = io->u.ci_rw.crw_pos + io->u.ci_rw.crw_count;
+ CDEBUG(D_VFSTRACE,
+ "stripe: %llu chunk: [%llu, %llu) %llu, %zd\n",
+ (__u64)start, lio->lis_pos, lio->lis_endpos,
+ (__u64)lio->lis_io_endpos, io->u.ci_rw.crw_count);
+
+ /*
+ * XXX The following call should be optimized: we know, that
+ * [lio->lis_pos, lio->lis_endpos) intersects with exactly one stripe.
+ */
+ RETURN(lov_io_iter_init(env, ios));
}
-static int lov_io_call(const struct lu_env *env, struct lov_io *lio,
- int (*iofunc)(const struct lu_env *, struct cl_io *))
+static int lov_io_setattr_iter_init(const struct lu_env *env,
+ const struct cl_io_slice *ios)
{
- struct lov_io_sub *sub;
- int rc = 0;
+ struct lov_io *lio = cl2lov_io(env, ios);
+ struct cl_io *io = ios->cis_io;
+ int index;
+ ENTRY;
+
+ if (cl_io_is_trunc(io) && lio->lis_pos > 0) {
+ index = lov_io_layout_at(lio, lio->lis_pos - 1);
+ /* no entry found for such offset */
+ if (index < 0)
+ RETURN(io->ci_result = -ENODATA);
+ }
+
+ RETURN(lov_io_iter_init(env, ios));
+}
- ENTRY;
- cfs_list_for_each_entry(sub, &lio->lis_active, sub_linkage) {
- lov_sub_enter(sub);
- rc = iofunc(sub->sub_env, sub->sub_io);
- lov_sub_exit(sub);
- if (rc)
- break;
- }
- RETURN(rc);
+static int lov_io_call(const struct lu_env *env, struct lov_io *lio,
+ int (*iofunc)(const struct lu_env *, struct cl_io *))
+{
+ struct cl_io *parent = lio->lis_cl.cis_io;
+ struct lov_io_sub *sub;
+ int rc = 0;
+
+ ENTRY;
+ list_for_each_entry(sub, &lio->lis_active, sub_linkage) {
+ rc = iofunc(sub->sub_env, &sub->sub_io);
+ if (rc)
+ break;
+
+ if (parent->ci_result == 0)
+ parent->ci_result = sub->sub_io.ci_result;
+ }
+ RETURN(rc);
}
static int lov_io_lock(const struct lu_env *env, const struct cl_io_slice *ios)
{
- ENTRY;
- RETURN(lov_io_call(env, cl2lov_io(env, ios), cl_io_lock));
+ ENTRY;
+ RETURN(lov_io_call(env, cl2lov_io(env, ios), cl_io_lock));
}
static int lov_io_start(const struct lu_env *env, const struct cl_io_slice *ios)
{
- ENTRY;
- RETURN(lov_io_call(env, cl2lov_io(env, ios), cl_io_start));
+ ENTRY;
+ RETURN(lov_io_call(env, cl2lov_io(env, ios), cl_io_start));
}
static int lov_io_end_wrapper(const struct lu_env *env, struct cl_io *io)
{
- ENTRY;
- /*
- * It's possible that lov_io_start() wasn't called against this
- * sub-io, either because previous sub-io failed, or upper layer
- * completed IO.
- */
- if (io->ci_state == CIS_IO_GOING)
- cl_io_end(env, io);
- else
- io->ci_state = CIS_IO_FINISHED;
- RETURN(0);
+ ENTRY;
+ /*
+ * It's possible that lov_io_start() wasn't called against this
+ * sub-io, either because previous sub-io failed, or upper layer
+ * completed IO.
+ */
+ if (io->ci_state == CIS_IO_GOING)
+ cl_io_end(env, io);
+ else
+ io->ci_state = CIS_IO_FINISHED;
+ RETURN(0);
}
static int lov_io_iter_fini_wrapper(const struct lu_env *env, struct cl_io *io)
{
- cl_io_iter_fini(env, io);
- RETURN(0);
+ cl_io_iter_fini(env, io);
+ RETURN(0);
}
static int lov_io_unlock_wrapper(const struct lu_env *env, struct cl_io *io)
{
- cl_io_unlock(env, io);
- RETURN(0);
+ cl_io_unlock(env, io);
+ RETURN(0);
}
static void lov_io_end(const struct lu_env *env, const struct cl_io_slice *ios)
{
- int rc;
+ int rc;
- rc = lov_io_call(env, cl2lov_io(env, ios), lov_io_end_wrapper);
- LASSERT(rc == 0);
+ rc = lov_io_call(env, cl2lov_io(env, ios), lov_io_end_wrapper);
+ LASSERT(rc == 0);
+}
+
+static void
+lov_io_data_version_end(const struct lu_env *env, const struct cl_io_slice *ios)
+{
+ struct lov_io *lio = cl2lov_io(env, ios);
+ struct cl_io *parent = lio->lis_cl.cis_io;
+ struct cl_data_version_io *pdv = &parent->u.ci_data_version;
+ struct lov_io_sub *sub;
+
+ ENTRY;
+ list_for_each_entry(sub, &lio->lis_active, sub_linkage) {
+ struct cl_data_version_io *sdv = &sub->sub_io.u.ci_data_version;
+
+ lov_io_end_wrapper(sub->sub_env, &sub->sub_io);
+
+ pdv->dv_data_version += sdv->dv_data_version;
+ if (pdv->dv_layout_version > sdv->dv_layout_version)
+ pdv->dv_layout_version = sdv->dv_layout_version;
+
+ if (parent->ci_result == 0)
+ parent->ci_result = sub->sub_io.ci_result;
+ }
+
+ EXIT;
}
static void lov_io_iter_fini(const struct lu_env *env,
const struct cl_io_slice *ios)
{
- struct lov_io *lio = cl2lov_io(env, ios);
- int rc;
-
- ENTRY;
- rc = lov_io_call(env, lio, lov_io_iter_fini_wrapper);
- LASSERT(rc == 0);
- while (!cfs_list_empty(&lio->lis_active))
- cfs_list_del_init(lio->lis_active.next);
- EXIT;
+ struct lov_io *lio = cl2lov_io(env, ios);
+ int rc;
+
+ ENTRY;
+ rc = lov_io_call(env, lio, lov_io_iter_fini_wrapper);
+ LASSERT(rc == 0);
+ while (!list_empty(&lio->lis_active))
+ list_del_init(lio->lis_active.next);
+ EXIT;
}
static void lov_io_unlock(const struct lu_env *env,
const struct cl_io_slice *ios)
{
- int rc;
+ int rc;
- ENTRY;
- rc = lov_io_call(env, cl2lov_io(env, ios), lov_io_unlock_wrapper);
- LASSERT(rc == 0);
- EXIT;
+ ENTRY;
+ rc = lov_io_call(env, cl2lov_io(env, ios), lov_io_unlock_wrapper);
+ LASSERT(rc == 0);
+ EXIT;
}
-
-static struct cl_page_list *lov_io_submit_qin(struct lov_device *ld,
- struct cl_page_list *qin,
- int idx, int alloc)
+static int lov_io_read_ahead(const struct lu_env *env,
+ const struct cl_io_slice *ios,
+ pgoff_t start, struct cl_read_ahead *ra)
{
- return alloc ? &qin[idx] : &ld->ld_emrg[idx]->emrg_page_list;
+ struct lov_io *lio = cl2lov_io(env, ios);
+ struct lov_object *loo = lio->lis_object;
+ struct cl_object *obj = lov2cl(loo);
+ struct lov_layout_raid0 *r0;
+ struct lov_io_sub *sub;
+ loff_t offset;
+ loff_t suboff;
+ pgoff_t ra_end;
+ unsigned int pps; /* pages per stripe */
+ int stripe;
+ int index;
+ int rc;
+ ENTRY;
+
+ offset = cl_offset(obj, start);
+ index = lov_io_layout_at(lio, offset);
+ if (index < 0 || !lsm_entry_inited(loo->lo_lsm, index))
+ RETURN(-ENODATA);
+
+ /* avoid readahead to expand to stale components */
+ if (!lov_entry(loo, index)->lle_valid)
+ RETURN(-EIO);
+
+ stripe = lov_stripe_number(loo->lo_lsm, index, offset);
+
+ r0 = lov_r0(loo, index);
+ if (unlikely(!r0->lo_sub[stripe]))
+ RETURN(-EIO);
+
+ sub = lov_sub_get(env, lio, lov_comp_index(index, stripe));
+ if (IS_ERR(sub))
+ RETURN(PTR_ERR(sub));
+
+ lov_stripe_offset(loo->lo_lsm, index, offset, stripe, &suboff);
+ rc = cl_io_read_ahead(sub->sub_env, &sub->sub_io,
+ cl_index(lovsub2cl(r0->lo_sub[stripe]), suboff),
+ ra);
+
+ CDEBUG(D_READA, DFID " cra_end = %lu, stripes = %d, rc = %d\n",
+ PFID(lu_object_fid(lov2lu(loo))), ra->cra_end, r0->lo_nr, rc);
+ if (rc != 0)
+ RETURN(rc);
+
+ /**
+ * Adjust the stripe index by layout of comp. ra->cra_end is the
+ * maximum page index covered by an underlying DLM lock.
+ * This function converts cra_end from stripe level to file level, and
+ * make sure it's not beyond stripe and component boundary.
+ */
+
+ /* cra_end is stripe level, convert it into file level */
+ ra_end = ra->cra_end;
+ if (ra_end != CL_PAGE_EOF)
+ ra->cra_end = lov_stripe_pgoff(loo->lo_lsm, index,
+ ra_end, stripe);
+
+ /* boundary of current component */
+ ra_end = cl_index(obj, (loff_t)lov_io_extent(lio, index)->e_end);
+ if (ra_end != CL_PAGE_EOF && ra->cra_end >= ra_end)
+ ra->cra_end = ra_end - 1;
+
+ if (r0->lo_nr == 1) /* single stripe file */
+ RETURN(0);
+
+ pps = lov_lse(loo, index)->lsme_stripe_size >> PAGE_SHIFT;
+
+ CDEBUG(D_READA, DFID " max_index = %lu, pps = %u, index = %u, "
+ "stripe_size = %u, stripe no = %u, start index = %lu\n",
+ PFID(lu_object_fid(lov2lu(loo))), ra->cra_end, pps, index,
+ lov_lse(loo, index)->lsme_stripe_size, stripe, start);
+
+ /* never exceed the end of the stripe */
+ ra->cra_end = min_t(pgoff_t,
+ ra->cra_end, start + pps - start % pps - 1);
+ RETURN(0);
}
/**
* lov_device::ld_mutex mutex.
*/
static int lov_io_submit(const struct lu_env *env,
- const struct cl_io_slice *ios,
- enum cl_req_type crt, struct cl_2queue *queue,
- enum cl_req_priority priority)
-{
- struct lov_io *lio = cl2lov_io(env, ios);
- struct lov_object *obj = lio->lis_object;
- struct lov_device *ld = lu2lov_dev(lov2cl(obj)->co_lu.lo_dev);
- struct cl_page_list *qin = &queue->c2_qin;
- struct cl_2queue *cl2q = &lov_env_info(env)->lti_cl2q;
- struct cl_page_list *stripes_qin = NULL;
- struct cl_page *page;
- struct cl_page *tmp;
- int stripe;
-
-#define QIN(stripe) lov_io_submit_qin(ld, stripes_qin, stripe, alloc)
-
- int rc = 0;
- int alloc =
-#if defined(__KERNEL__) && defined(__linux__)
- !(current->flags & PF_MEMALLOC);
-#else
- 1;
-#endif
- ENTRY;
- if (lio->lis_active_subios == 1) {
- int idx = lio->lis_single_subio_index;
- struct lov_io_sub *sub;
-
- LASSERT(idx < lio->lis_nr_subios);
- sub = lov_sub_get(env, lio, idx);
- LASSERT(!IS_ERR(sub));
- LASSERT(sub->sub_io == &lio->lis_single_subio);
- rc = cl_io_submit_rw(sub->sub_env, sub->sub_io,
- crt, queue, priority);
- lov_sub_put(sub);
- RETURN(rc);
- }
-
- LASSERT(lio->lis_subs != NULL);
- if (alloc) {
- OBD_ALLOC(stripes_qin,
- sizeof(*stripes_qin) * lio->lis_nr_subios);
- if (stripes_qin == NULL)
- RETURN(-ENOMEM);
-
- for (stripe = 0; stripe < lio->lis_nr_subios; stripe++)
- cl_page_list_init(&stripes_qin[stripe]);
- } else {
- /*
- * If we get here, it means pageout & swap doesn't help.
- * In order to not make things worse, even don't try to
- * allocate the memory with __GFP_NOWARN. -jay
- */
- cfs_mutex_lock(&ld->ld_mutex);
- lio->lis_mem_frozen = 1;
- }
-
- cl_2queue_init(cl2q);
- cl_page_list_for_each_safe(page, tmp, qin) {
- stripe = lov_page_stripe(page);
- cl_page_list_move(QIN(stripe), qin, page);
- }
-
- for (stripe = 0; stripe < lio->lis_nr_subios; stripe++) {
- struct lov_io_sub *sub;
- struct cl_page_list *sub_qin = QIN(stripe);
-
- if (cfs_list_empty(&sub_qin->pl_pages))
- continue;
-
- cl_page_list_splice(sub_qin, &cl2q->c2_qin);
- sub = lov_sub_get(env, lio, stripe);
- if (!IS_ERR(sub)) {
- rc = cl_io_submit_rw(sub->sub_env, sub->sub_io,
- crt, cl2q, priority);
- lov_sub_put(sub);
- } else
- rc = PTR_ERR(sub);
- cl_page_list_splice(&cl2q->c2_qin, &queue->c2_qin);
- cl_page_list_splice(&cl2q->c2_qout, &queue->c2_qout);
- if (rc != 0)
- break;
- }
-
- for (stripe = 0; stripe < lio->lis_nr_subios; stripe++) {
- struct cl_page_list *sub_qin = QIN(stripe);
-
- if (cfs_list_empty(&sub_qin->pl_pages))
- continue;
-
- cl_page_list_splice(sub_qin, qin);
- }
-
- if (alloc) {
- OBD_FREE(stripes_qin,
- sizeof(*stripes_qin) * lio->lis_nr_subios);
- } else {
- int i;
-
- for (i = 0; i < lio->lis_nr_subios; i++) {
- struct cl_io *cio = lio->lis_subs[i].sub_io;
-
- if (cio && cio == &ld->ld_emrg[i]->emrg_subio)
- lov_io_sub_fini(env, lio, &lio->lis_subs[i]);
- }
- lio->lis_mem_frozen = 0;
- cfs_mutex_unlock(&ld->ld_mutex);
- }
-
- RETURN(rc);
-#undef QIN
-}
-
-static int lov_io_prepare_write(const struct lu_env *env,
- const struct cl_io_slice *ios,
- const struct cl_page_slice *slice,
- unsigned from, unsigned to)
-{
- struct lov_io *lio = cl2lov_io(env, ios);
- struct cl_page *sub_page = lov_sub_page(slice);
- struct lov_io_sub *sub;
- int result;
-
- ENTRY;
- sub = lov_page_subio(env, lio, slice);
- if (!IS_ERR(sub)) {
- result = cl_io_prepare_write(sub->sub_env, sub->sub_io,
- sub_page, from, to);
- lov_sub_put(sub);
- } else
- result = PTR_ERR(sub);
- RETURN(result);
-}
-
-static int lov_io_commit_write(const struct lu_env *env,
- const struct cl_io_slice *ios,
- const struct cl_page_slice *slice,
- unsigned from, unsigned to)
-{
- struct lov_io *lio = cl2lov_io(env, ios);
- struct cl_page *sub_page = lov_sub_page(slice);
- struct lov_io_sub *sub;
- int result;
-
- ENTRY;
- sub = lov_page_subio(env, lio, slice);
- if (!IS_ERR(sub)) {
- result = cl_io_commit_write(sub->sub_env, sub->sub_io,
- sub_page, from, to);
- lov_sub_put(sub);
- } else
- result = PTR_ERR(sub);
- RETURN(result);
+ const struct cl_io_slice *ios,
+ enum cl_req_type crt, struct cl_2queue *queue)
+{
+ struct cl_page_list *qin = &queue->c2_qin;
+ struct lov_io *lio = cl2lov_io(env, ios);
+ struct lov_io_sub *sub;
+ struct cl_page_list *plist = &lov_env_info(env)->lti_plist;
+ struct cl_page *page;
+ struct cl_page *tmp;
+ int index;
+ int rc = 0;
+ ENTRY;
+
+ cl_page_list_init(plist);
+ while (qin->pl_nr > 0) {
+ struct cl_2queue *cl2q = &lov_env_info(env)->lti_cl2q;
+
+ page = cl_page_list_first(qin);
+ if (lov_page_is_empty(page)) {
+ cl_page_list_move(&queue->c2_qout, qin, page);
+
+ /*
+ * it could only be mirror read to get here therefore
+ * the pages will be transient. We don't care about
+ * the return code of cl_page_prep() at all.
+ */
+ (void) cl_page_prep(env, ios->cis_io, page, crt);
+ cl_page_completion(env, page, crt, 0);
+ continue;
+ }
+
+ cl_2queue_init(cl2q);
+ cl_page_list_move(&cl2q->c2_qin, qin, page);
+
+ index = page->cp_lov_index;
+ cl_page_list_for_each_safe(page, tmp, qin) {
+ /* this page is not on this stripe */
+ if (index != page->cp_lov_index)
+ continue;
+
+ cl_page_list_move(&cl2q->c2_qin, qin, page);
+ }
+
+ sub = lov_sub_get(env, lio, index);
+ if (!IS_ERR(sub)) {
+ rc = cl_io_submit_rw(sub->sub_env, &sub->sub_io,
+ crt, cl2q);
+ } else {
+ rc = PTR_ERR(sub);
+ }
+
+ cl_page_list_splice(&cl2q->c2_qin, plist);
+ cl_page_list_splice(&cl2q->c2_qout, &queue->c2_qout);
+ cl_2queue_fini(env, cl2q);
+
+ if (rc != 0)
+ break;
+ }
+
+ cl_page_list_splice(plist, qin);
+ cl_page_list_fini(env, plist);
+
+ RETURN(rc);
+}
+
+static int lov_io_commit_async(const struct lu_env *env,
+ const struct cl_io_slice *ios,
+ struct cl_page_list *queue, int from, int to,
+ cl_commit_cbt cb)
+{
+ struct cl_page_list *plist = &lov_env_info(env)->lti_plist;
+ struct lov_io *lio = cl2lov_io(env, ios);
+ struct lov_io_sub *sub;
+ struct cl_page *page;
+ int rc = 0;
+ ENTRY;
+
+ if (lio->lis_nr_subios == 1) {
+ int idx = lio->lis_single_subio_index;
+
+ LASSERT(!lov_page_is_empty(cl_page_list_first(queue)));
+
+ sub = lov_sub_get(env, lio, idx);
+ LASSERT(!IS_ERR(sub));
+ LASSERT(sub == &lio->lis_single_subio);
+ rc = cl_io_commit_async(sub->sub_env, &sub->sub_io, queue,
+ from, to, cb);
+ RETURN(rc);
+ }
+
+ cl_page_list_init(plist);
+ while (queue->pl_nr > 0) {
+ int stripe_to = to;
+ int index;
+
+ LASSERT(plist->pl_nr == 0);
+ page = cl_page_list_first(queue);
+ LASSERT(!lov_page_is_empty(page));
+
+ cl_page_list_move(plist, queue, page);
+
+ index = page->cp_lov_index;
+ while (queue->pl_nr > 0) {
+ page = cl_page_list_first(queue);
+ if (index != page->cp_lov_index)
+ break;
+
+ cl_page_list_move(plist, queue, page);
+ }
+
+ if (queue->pl_nr > 0) /* still has more pages */
+ stripe_to = PAGE_SIZE;
+
+ sub = lov_sub_get(env, lio, index);
+ if (!IS_ERR(sub)) {
+ rc = cl_io_commit_async(sub->sub_env, &sub->sub_io,
+ plist, from, stripe_to, cb);
+ } else {
+ rc = PTR_ERR(sub);
+ break;
+ }
+
+ if (plist->pl_nr > 0) /* short write */
+ break;
+
+ from = 0;
+ }
+
+ /* for error case, add the page back into the qin list */
+ LASSERT(ergo(rc == 0, plist->pl_nr == 0));
+ while (plist->pl_nr > 0) {
+ /* error occurred, add the uncommitted pages back into queue */
+ page = cl_page_list_last(plist);
+ cl_page_list_move_head(queue, plist, page);
+ }
+
+ RETURN(rc);
}
static int lov_io_fault_start(const struct lu_env *env,
- const struct cl_io_slice *ios)
+ const struct cl_io_slice *ios)
{
- struct cl_fault_io *fio;
- struct lov_io *lio;
- struct lov_io_sub *sub;
+ struct cl_fault_io *fio;
+ struct lov_io *lio;
+ struct lov_io_sub *sub;
+
+ ENTRY;
- ENTRY;
- fio = &ios->cis_io->u.ci_fault;
- lio = cl2lov_io(env, ios);
- sub = lov_sub_get(env, lio, lov_page_stripe(fio->ft_page));
- sub->sub_io->u.ci_fault.ft_nob = fio->ft_nob;
- lov_sub_put(sub);
- RETURN(lov_io_start(env, ios));
+ fio = &ios->cis_io->u.ci_fault;
+ lio = cl2lov_io(env, ios);
+ sub = lov_sub_get(env, lio, fio->ft_page->cp_lov_index);
+ sub->sub_io.u.ci_fault.ft_nob = fio->ft_nob;
+
+ RETURN(lov_io_start(env, ios));
+}
+
+static void lov_io_fsync_end(const struct lu_env *env,
+ const struct cl_io_slice *ios)
+{
+ struct lov_io *lio = cl2lov_io(env, ios);
+ struct lov_io_sub *sub;
+ unsigned int *written = &ios->cis_io->u.ci_fsync.fi_nr_written;
+ ENTRY;
+
+ *written = 0;
+ list_for_each_entry(sub, &lio->lis_active, sub_linkage) {
+ struct cl_io *subio = &sub->sub_io;
+
+ lov_io_end_wrapper(sub->sub_env, subio);
+
+ if (subio->ci_result == 0)
+ *written += subio->u.ci_fsync.fi_nr_written;
+ }
+ RETURN_EXIT;
}
static const struct cl_io_operations lov_io_ops = {
- .op = {
- [CIT_READ] = {
- .cio_fini = lov_io_fini,
- .cio_iter_init = lov_io_rw_iter_init,
- .cio_iter_fini = lov_io_iter_fini,
- .cio_lock = lov_io_lock,
- .cio_unlock = lov_io_unlock,
- .cio_start = lov_io_start,
- .cio_end = lov_io_end
- },
- [CIT_WRITE] = {
- .cio_fini = lov_io_fini,
- .cio_iter_init = lov_io_rw_iter_init,
- .cio_iter_fini = lov_io_iter_fini,
- .cio_lock = lov_io_lock,
- .cio_unlock = lov_io_unlock,
- .cio_start = lov_io_start,
- .cio_end = lov_io_end
- },
- [CIT_SETATTR] = {
- .cio_fini = lov_io_fini,
- .cio_iter_init = lov_io_iter_init,
- .cio_iter_fini = lov_io_iter_fini,
- .cio_lock = lov_io_lock,
- .cio_unlock = lov_io_unlock,
- .cio_start = lov_io_start,
- .cio_end = lov_io_end
- },
- [CIT_FAULT] = {
- .cio_fini = lov_io_fini,
- .cio_iter_init = lov_io_iter_init,
- .cio_iter_fini = lov_io_iter_fini,
- .cio_lock = lov_io_lock,
- .cio_unlock = lov_io_unlock,
- .cio_start = lov_io_fault_start,
- .cio_end = lov_io_end
- },
- [CIT_MISC] = {
- .cio_fini = lov_io_fini
- }
- },
- .req_op = {
- [CRT_READ] = {
- .cio_submit = lov_io_submit
- },
- [CRT_WRITE] = {
- .cio_submit = lov_io_submit
- }
- },
- .cio_prepare_write = lov_io_prepare_write,
- .cio_commit_write = lov_io_commit_write
+ .op = {
+ [CIT_READ] = {
+ .cio_fini = lov_io_fini,
+ .cio_iter_init = lov_io_rw_iter_init,
+ .cio_iter_fini = lov_io_iter_fini,
+ .cio_lock = lov_io_lock,
+ .cio_unlock = lov_io_unlock,
+ .cio_start = lov_io_start,
+ .cio_end = lov_io_end
+ },
+ [CIT_WRITE] = {
+ .cio_fini = lov_io_fini,
+ .cio_iter_init = lov_io_rw_iter_init,
+ .cio_iter_fini = lov_io_iter_fini,
+ .cio_lock = lov_io_lock,
+ .cio_unlock = lov_io_unlock,
+ .cio_start = lov_io_start,
+ .cio_end = lov_io_end
+ },
+ [CIT_SETATTR] = {
+ .cio_fini = lov_io_fini,
+ .cio_iter_init = lov_io_setattr_iter_init,
+ .cio_iter_fini = lov_io_iter_fini,
+ .cio_lock = lov_io_lock,
+ .cio_unlock = lov_io_unlock,
+ .cio_start = lov_io_start,
+ .cio_end = lov_io_end
+ },
+ [CIT_DATA_VERSION] = {
+ .cio_fini = lov_io_fini,
+ .cio_iter_init = lov_io_iter_init,
+ .cio_iter_fini = lov_io_iter_fini,
+ .cio_lock = lov_io_lock,
+ .cio_unlock = lov_io_unlock,
+ .cio_start = lov_io_start,
+ .cio_end = lov_io_data_version_end,
+ },
+ [CIT_FAULT] = {
+ .cio_fini = lov_io_fini,
+ .cio_iter_init = lov_io_iter_init,
+ .cio_iter_fini = lov_io_iter_fini,
+ .cio_lock = lov_io_lock,
+ .cio_unlock = lov_io_unlock,
+ .cio_start = lov_io_fault_start,
+ .cio_end = lov_io_end
+ },
+ [CIT_FSYNC] = {
+ .cio_fini = lov_io_fini,
+ .cio_iter_init = lov_io_iter_init,
+ .cio_iter_fini = lov_io_iter_fini,
+ .cio_lock = lov_io_lock,
+ .cio_unlock = lov_io_unlock,
+ .cio_start = lov_io_start,
+ .cio_end = lov_io_fsync_end
+ },
+ [CIT_LADVISE] = {
+ .cio_fini = lov_io_fini,
+ .cio_iter_init = lov_io_iter_init,
+ .cio_iter_fini = lov_io_iter_fini,
+ .cio_lock = lov_io_lock,
+ .cio_unlock = lov_io_unlock,
+ .cio_start = lov_io_start,
+ .cio_end = lov_io_end
+ },
+ [CIT_GLIMPSE] = {
+ .cio_fini = lov_io_fini,
+ },
+ [CIT_MISC] = {
+ .cio_fini = lov_io_fini
+ }
+ },
+ .cio_read_ahead = lov_io_read_ahead,
+ .cio_submit = lov_io_submit,
+ .cio_commit_async = lov_io_commit_async,
};
/*****************************************************************************
static void lov_empty_io_fini(const struct lu_env *env,
const struct cl_io_slice *ios)
{
- ENTRY;
- EXIT;
+ struct lov_object *lov = cl2lov(ios->cis_obj);
+ ENTRY;
+
+ if (atomic_dec_and_test(&lov->lo_active_ios))
+ wake_up_all(&lov->lo_waitq);
+ EXIT;
+}
+
+static int lov_empty_io_submit(const struct lu_env *env,
+ const struct cl_io_slice *ios,
+ enum cl_req_type crt, struct cl_2queue *queue)
+{
+ return -EBADF;
}
static void lov_empty_impossible(const struct lu_env *env,
struct cl_io_slice *ios)
{
- LBUG();
+ LBUG();
}
#define LOV_EMPTY_IMPOSSIBLE ((void *)lov_empty_impossible)
* An io operation vector for files without stripes.
*/
static const struct cl_io_operations lov_empty_io_ops = {
- .op = {
- [CIT_READ] = {
+ .op = {
+ [CIT_READ] = {
+ .cio_fini = lov_empty_io_fini,
#if 0
- .cio_fini = lov_empty_io_fini,
- .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
- .cio_lock = LOV_EMPTY_IMPOSSIBLE,
- .cio_start = LOV_EMPTY_IMPOSSIBLE,
- .cio_end = LOV_EMPTY_IMPOSSIBLE
+ .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
+ .cio_lock = LOV_EMPTY_IMPOSSIBLE,
+ .cio_start = LOV_EMPTY_IMPOSSIBLE,
+ .cio_end = LOV_EMPTY_IMPOSSIBLE
#endif
- },
- [CIT_WRITE] = {
- .cio_fini = lov_empty_io_fini,
- .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
- .cio_lock = LOV_EMPTY_IMPOSSIBLE,
- .cio_start = LOV_EMPTY_IMPOSSIBLE,
- .cio_end = LOV_EMPTY_IMPOSSIBLE
- },
- [CIT_SETATTR] = {
- .cio_fini = lov_empty_io_fini,
- .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
- .cio_lock = LOV_EMPTY_IMPOSSIBLE,
- .cio_start = LOV_EMPTY_IMPOSSIBLE,
- .cio_end = LOV_EMPTY_IMPOSSIBLE
- },
- [CIT_FAULT] = {
- .cio_fini = lov_empty_io_fini,
- .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
- .cio_lock = LOV_EMPTY_IMPOSSIBLE,
- .cio_start = LOV_EMPTY_IMPOSSIBLE,
- .cio_end = LOV_EMPTY_IMPOSSIBLE
- },
- [CIT_MISC] = {
- .cio_fini = lov_empty_io_fini
- }
- },
- .req_op = {
- [CRT_READ] = {
- .cio_submit = LOV_EMPTY_IMPOSSIBLE
- },
- [CRT_WRITE] = {
- .cio_submit = LOV_EMPTY_IMPOSSIBLE
- }
- },
- .cio_commit_write = LOV_EMPTY_IMPOSSIBLE
+ },
+ [CIT_WRITE] = {
+ .cio_fini = lov_empty_io_fini,
+ .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
+ .cio_lock = LOV_EMPTY_IMPOSSIBLE,
+ .cio_start = LOV_EMPTY_IMPOSSIBLE,
+ .cio_end = LOV_EMPTY_IMPOSSIBLE
+ },
+ [CIT_SETATTR] = {
+ .cio_fini = lov_empty_io_fini,
+ .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
+ .cio_lock = LOV_EMPTY_IMPOSSIBLE,
+ .cio_start = LOV_EMPTY_IMPOSSIBLE,
+ .cio_end = LOV_EMPTY_IMPOSSIBLE
+ },
+ [CIT_FAULT] = {
+ .cio_fini = lov_empty_io_fini,
+ .cio_iter_init = LOV_EMPTY_IMPOSSIBLE,
+ .cio_lock = LOV_EMPTY_IMPOSSIBLE,
+ .cio_start = LOV_EMPTY_IMPOSSIBLE,
+ .cio_end = LOV_EMPTY_IMPOSSIBLE
+ },
+ [CIT_FSYNC] = {
+ .cio_fini = lov_empty_io_fini
+ },
+ [CIT_LADVISE] = {
+ .cio_fini = lov_empty_io_fini
+ },
+ [CIT_GLIMPSE] = {
+ .cio_fini = lov_empty_io_fini
+ },
+ [CIT_MISC] = {
+ .cio_fini = lov_empty_io_fini
+ }
+ },
+ .cio_submit = lov_empty_io_submit,
+ .cio_commit_async = LOV_EMPTY_IMPOSSIBLE
};
-int lov_io_init_raid0(const struct lu_env *env, struct cl_object *obj,
- struct cl_io *io)
+int lov_io_init_composite(const struct lu_env *env, struct cl_object *obj,
+ struct cl_io *io)
{
- struct lov_io *lio = lov_env_io(env);
- struct lov_object *lov = cl2lov(obj);
-
- ENTRY;
- CFS_INIT_LIST_HEAD(&lio->lis_active);
- lov_io_slice_init(lio, lov, io);
- if (io->ci_result == 0) {
- LASSERT(lov_r0(lov)->lo_lsm != NULL);
- io->ci_result = lov_io_subio_init(env, lio, io);
- if (io->ci_result == 0)
- cl_io_slice_add(io, &lio->lis_cl, obj, &lov_io_ops);
- }
- RETURN(io->ci_result);
+ struct lov_io *lio = lov_env_io(env);
+ struct lov_object *lov = cl2lov(obj);
+ int result;
+
+ ENTRY;
+
+ INIT_LIST_HEAD(&lio->lis_active);
+ result = lov_io_slice_init(lio, lov, io);
+ if (result)
+ GOTO(out, result);
+
+ result = lov_io_subio_init(env, lio, io);
+ if (!result) {
+ cl_io_slice_add(io, &lio->lis_cl, obj, &lov_io_ops);
+ atomic_inc(&lov->lo_active_ios);
+ }
+ EXIT;
+out:
+ io->ci_result = result < 0 ? result : 0;
+ return result;
}
int lov_io_init_empty(const struct lu_env *env, struct cl_object *obj,
struct cl_io *io)
{
- struct lov_io *lio = lov_env_io(env);
- int result;
-
- ENTRY;
- switch (io->ci_type) {
- default:
- LBUG();
- case CIT_MISC:
- case CIT_READ:
- result = 0;
- break;
- case CIT_WRITE:
- case CIT_SETATTR:
- result = -EBADF;
- break;
- case CIT_FAULT:
- result = -EFAULT;
- CERROR("Page fault on a file without stripes: "DFID"\n",
- PFID(lu_object_fid(&obj->co_lu)));
- break;
- }
- if (result == 0)
- cl_io_slice_add(io, &lio->lis_cl, obj, &lov_empty_io_ops);
- io->ci_result = result;
- RETURN(result != 0);
+ struct lov_object *lov = cl2lov(obj);
+ struct lov_io *lio = lov_env_io(env);
+ int result;
+ ENTRY;
+
+ lio->lis_object = lov;
+ switch (io->ci_type) {
+ default:
+ LBUG();
+ case CIT_MISC:
+ case CIT_GLIMPSE:
+ case CIT_READ:
+ result = 0;
+ break;
+ case CIT_FSYNC:
+ case CIT_LADVISE:
+ case CIT_SETATTR:
+ case CIT_DATA_VERSION:
+ result = +1;
+ break;
+ case CIT_WRITE:
+ result = -EBADF;
+ break;
+ case CIT_FAULT:
+ result = -EFAULT;
+ CERROR("Page fault on a file without stripes: "DFID"\n",
+ PFID(lu_object_fid(&obj->co_lu)));
+ break;
+ }
+ if (result == 0) {
+ cl_io_slice_add(io, &lio->lis_cl, obj, &lov_empty_io_ops);
+ atomic_inc(&lov->lo_active_ios);
+ }
+
+ io->ci_result = result < 0 ? result : 0;
+ RETURN(result);
+}
+
+int lov_io_init_released(const struct lu_env *env, struct cl_object *obj,
+ struct cl_io *io)
+{
+ struct lov_object *lov = cl2lov(obj);
+ struct lov_io *lio = lov_env_io(env);
+ int result;
+ ENTRY;
+
+ LASSERT(lov->lo_lsm != NULL);
+ lio->lis_object = lov;
+
+ switch (io->ci_type) {
+ default:
+ LASSERTF(0, "invalid type %d\n", io->ci_type);
+ result = -EOPNOTSUPP;
+ break;
+ case CIT_GLIMPSE:
+ case CIT_MISC:
+ case CIT_FSYNC:
+ case CIT_LADVISE:
+ case CIT_DATA_VERSION:
+ result = 1;
+ break;
+ case CIT_SETATTR:
+ /*
+ * the truncate to 0 is managed by MDT:
+ * - in open, for open O_TRUNC
+ * - in setattr, for truncate
+ */
+ /* the truncate is for size > 0 so triggers a restore */
+ if (cl_io_is_trunc(io)) {
+ io->ci_restore_needed = 1;
+ result = -ENODATA;
+ } else
+ result = 1;
+ break;
+ case CIT_READ:
+ case CIT_WRITE:
+ case CIT_FAULT:
+ io->ci_restore_needed = 1;
+ result = -ENODATA;
+ break;
+ }
+
+ if (result == 0) {
+ cl_io_slice_add(io, &lio->lis_cl, obj, &lov_empty_io_ops);
+ atomic_inc(&lov->lo_active_ios);
+ }
+
+ io->ci_result = result < 0 ? result : 0;
+ RETURN(result);
+}
+
+/**
+ * Return the index in composite:lo_entries by the file offset
+ */
+int lov_io_layout_at(struct lov_io *lio, __u64 offset)
+{
+ struct lov_object *lov = lio->lis_object;
+ struct lov_layout_composite *comp = &lov->u.composite;
+ int start_index = 0;
+ int end_index = comp->lo_entry_count - 1;
+ int i;
+
+ LASSERT(lov->lo_type == LLT_COMP);
+
+ /* This is actual file offset so nothing can cover eof. */
+ if (offset == LUSTRE_EOF)
+ return -1;
+
+ if (lov_is_flr(lov)) {
+ struct lov_mirror_entry *lre;
+
+ LASSERT(lio->lis_mirror_index >= 0);
+
+ lre = &comp->lo_mirrors[lio->lis_mirror_index];
+ start_index = lre->lre_start;
+ end_index = lre->lre_end;
+ }
+
+ for (i = start_index; i <= end_index; i++) {
+ struct lov_layout_entry *lle = lov_entry(lov, i);
+
+ if ((offset >= lle->lle_extent->e_start &&
+ offset < lle->lle_extent->e_end) ||
+ (offset == OBD_OBJECT_EOF &&
+ lle->lle_extent->e_end == OBD_OBJECT_EOF))
+ return i;
+ }
+
+ return -1;
}
/** @} lov */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff