*
* 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 (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, Whamcloud, Inc.
+ * Copyright (c) 2011, 2016, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* @{
*/
-static inline void lov_sub_enter(struct lov_io_sub *sub)
-{
- sub->sub_reenter++;
-}
-static inline void lov_sub_exit(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 != NULL) {
+ INIT_LIST_HEAD(&sub->sub_list);
+ INIT_LIST_HEAD(&sub->sub_linkage);
+ sub->sub_subio_index = index;
+ }
+
+ return sub;
}
-static void lov_io_sub_fini(const struct lu_env *env, struct lov_io *lio,
- struct lov_io_sub *sub)
+static inline void lov_sub_free(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;
+ 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_inherit(struct cl_io *io, struct lov_io *lio,
- int stripe, loff_t start, loff_t end)
+static void lov_io_sub_fini(const struct lu_env *env, struct lov_io *lio,
+ struct lov_io_sub *sub)
{
- struct lov_stripe_md *lsm = lio->lis_lsm;
- struct cl_io *parent = lio->lis_cl.cis_io;
+ ENTRY;
- 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;
+ cl_io_fini(sub->sub_env, &sub->sub_io);
- 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_FSYNC: {
- io->u.ci_fsync.fi_start = start;
- io->u.ci_fsync.fi_end = end;
- io->u.ci_fsync.fi_capa = parent->u.ci_fsync.fi_capa;
- 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;
+ if (sub->sub_env != NULL && !IS_ERR(sub->sub_env)) {
+ cl_env_put(sub->sub_env, &sub->sub_refcheck);
+ sub->sub_env = NULL;
}
- 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;
- }
- default:
- break;
- }
+ EXIT;
}
static int lov_io_sub_init(const struct lu_env *env, struct lov_io *lio,
- struct lov_io_sub *sub)
+ 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;
+ 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;
- int stripe = sub->sub_stripe;
- int result;
+ if (unlikely(!lov_r0(lov, index)->lo_sub ||
+ !lov_r0(lov, index)->lo_sub[stripe]))
+ RETURN(-EIO);
- LASSERT(sub->sub_io == NULL);
- LASSERT(sub->sub_env == NULL);
- LASSERT(sub->sub_stripe < lio->lis_stripe_count);
- ENTRY;
+ /* obtain new environment */
+ sub->sub_env = cl_env_get(&sub->sub_refcheck);
+ if (IS_ERR(sub->sub_env))
+ result = PTR_ERR(sub->sub_env);
- 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;
- }
- }
- }
+ sub_obj = lovsub2cl(lov_r0(lov, index)->lo_sub[stripe]);
+ sub_io = &sub->sub_io;
- 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);
+ 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_pio = io->ci_pio;
+ sub_io->ci_lock_no_expand = io->ci_lock_no_expand;
+
+ 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);
}
struct lov_io_sub *lov_sub_get(const struct lu_env *env,
- struct lov_io *lio, int stripe)
+ struct lov_io *lio, int index)
{
- int rc;
- struct lov_io_sub *sub = &lio->lis_subs[stripe];
+ struct lov_io_sub *sub;
+ int rc = 0;
- LASSERT(stripe < lio->lis_stripe_count);
- ENTRY;
+ ENTRY;
- 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);
-}
+ list_for_each_entry(sub, &lio->lis_subios, sub_list) {
+ if (sub->sub_subio_index == index) {
+ rc = 1;
+ break;
+ }
+ }
-void lov_sub_put(struct lov_io_sub *sub)
-{
- lov_sub_exit(sub);
+ if (rc == 0) {
+ sub = lov_sub_alloc(lio, index);
+ if (sub == NULL)
+ 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);
}
/*****************************************************************************
*
*/
-static int lov_page_stripe(const struct cl_page *page)
+int lov_page_index(const struct cl_page *page)
{
- struct lovsub_object *subobj;
-
- 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);
-}
-
-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 = lio->lis_lsm;
- struct cl_page *page = slice->cpl_page;
- int stripe;
+ const struct cl_page_slice *slice;
+ ENTRY;
- 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;
+ slice = cl_page_at(page, &lov_device_type);
+ LASSERT(slice != NULL);
+ LASSERT(slice->cpl_obj != NULL);
- stripe = lov_page_stripe(page);
- RETURN(lov_sub_get(env, lio, stripe));
+ RETURN(cl2lov_page(slice)->lps_index);
}
-
static int lov_io_subio_init(const struct lu_env *env, struct lov_io *lio,
struct cl_io *io)
{
- struct lov_stripe_md *lsm = lio->lis_lsm;
- int result;
+ ENTRY;
- LASSERT(lio->lis_object != NULL);
- ENTRY;
+ LASSERT(lio->lis_object != NULL);
- /*
- * Need to be optimized, we can't afford to allocate a piece of memory
- * when writing a page. -jay
- */
- OBD_ALLOC_LARGE(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);
+ INIT_LIST_HEAD(&lio->lis_subios);
+ lio->lis_single_subio_index = -1;
+ lio->lis_nr_subios = 0;
+
+ RETURN(0);
}
-static void lov_io_slice_init(struct lov_io *lio,
- struct lov_object *obj, struct cl_io *io)
+static int lov_io_slice_init(struct lov_io *lio,
+ struct lov_object *obj, struct cl_io *io)
{
ENTRY;
lio->lis_object = obj;
LASSERT(obj->lo_lsm != NULL);
- lio->lis_lsm = lsm_addref(obj->lo_lsm);
- lio->lis_stripe_count = lio->lis_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;
+
+ switch (io->ci_type) {
+ case CIT_READ:
+ case CIT_WRITE:
+ lio->lis_pos = io->u.ci_rw.rw_range.cir_pos;
+ lio->lis_endpos = lio->lis_pos + io->u.ci_rw.rw_range.cir_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))
+ RETURN(-EIO);
+
+ lio->lis_pos = 0;
+ lio->lis_endpos = OBD_OBJECT_EOF;
+ }
+ break;
case CIT_SETATTR:
if (cl_io_is_trunc(io))
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);
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_MISC:
lio->lis_pos = 0;
lio->lis_endpos = OBD_OBJECT_EOF;
LBUG();
}
- EXIT;
+ RETURN(0);
}
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;
- 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_LARGE(lio->lis_subs,
- lio->lis_nr_subios * sizeof lio->lis_subs[0]);
- lio->lis_nr_subios = 0;
- }
- lov_lsm_decref(lio->lis_object, lio->lis_lsm);
- lio->lis_lsm = NULL;
+ 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;
}
-static obd_off lov_offset_mod(obd_off val, int delta)
+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);
+
+ io->ci_pio = parent->ci_pio;
+ 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_valid = parent->u.ci_setattr.sa_valid;
+ 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_rw.rw_ptask = parent->u.ci_rw.rw_ptask;
+ io->u.ci_rw.rw_iter = parent->u.ci_rw.rw_iter;
+ io->u.ci_rw.rw_iocb = parent->u.ci_rw.rw_iocb;
+ io->u.ci_rw.rw_file = parent->u.ci_rw.rw_file;
+ io->u.ci_rw.rw_sync = parent->u.ci_rw.rw_sync;
+ if (cl_io_is_append(parent)) {
+ io->u.ci_rw.rw_append = 1;
+ } else {
+ io->u.ci_rw.rw_range.cir_pos = start;
+ io->u.ci_rw.rw_range.cir_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;
+ }
+ default:
+ break;
+ }
+}
+
+static loff_t lov_offset_mod(loff_t val, int delta)
{
if (val != OBD_OBJECT_EOF)
val += delta;
}
static int lov_io_iter_init(const struct lu_env *env,
- const struct cl_io_slice *ios)
+ const struct cl_io_slice *ios)
{
+ struct cl_io *io = ios->cis_io;
struct lov_io *lio = cl2lov_io(env, ios);
- struct lov_stripe_md *lsm = lio->lis_lsm;
- struct lov_io_sub *sub;
- obd_off endpos;
- obd_off start;
- obd_off end;
- int stripe;
- int rc = 0;
+ struct lov_stripe_md *lsm = lio->lis_object->lo_lsm;
+ struct lov_io_sub *sub;
+ struct lov_layout_entry *le;
+ struct lu_extent ext;
+ int index;
+ 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: %d ["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);
+
+ ext.e_start = lio->lis_pos;
+ ext.e_end = lio->lis_endpos;
+
+ index = 0;
+ lov_foreach_layout_entry(lio->lis_object, le) {
+ struct lov_layout_raid0 *r0 = &le->lle_raid0;
+ u64 start;
+ u64 end;
+ int stripe;
+
+ index++;
+ if (!lu_extent_is_overlapped(&ext, &le->lle_extent))
+ continue;
+
+ CDEBUG(D_VFSTRACE, "component[%d] flags %#x\n",
+ index - 1, lsm->lsm_entries[index - 1]->lsme_flags);
+ if (!lsm_entry_inited(lsm, index - 1)) {
+ /* truncate IO will trigger write intent as well, and
+ * it's handled in lov_io_setattr_iter_init() */
+ if (io->ci_type == CIT_WRITE || cl_io_is_mkwrite(io)) {
+ io->ci_need_write_intent = 1;
+ /* execute it in main thread */
+ io->ci_pio = 0;
+ rc = -ENODATA;
+ break;
+ }
+
+ /* Read from uninitialized components should return
+ * zero filled pages. */
+ continue;
+ }
+
+ for (stripe = 0; stripe < r0->lo_nr; stripe++) {
+ if (!lov_stripe_intersects(lsm, index - 1, stripe,
+ &ext, &start, &end))
+ continue;
+
+ if (unlikely(r0->lo_sub[stripe] == NULL)) {
+ 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 - 1, 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 stripe: {%d, %d} range: [%llu, %llu)\n",
+ index, 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)
+ 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 = lio->lis_lsm;
- loff_t start = io->u.ci_rw.crw_pos;
- loff_t next;
- unsigned long ssize = lsm->lsm_stripe_size;
+ struct cl_io *io = ios->cis_io;
+ struct lov_io *lio = cl2lov_io(env, ios);
+ struct lov_stripe_md *lsm = lio->lis_object->lo_lsm;
+ struct lov_stripe_md_entry *lse;
+ struct cl_io_range *range = &io->u.ci_rw.rw_range;
+ loff_t start = range->cir_pos;
+ loff_t next;
+ int index;
+
+ LASSERT(io->ci_type == CIT_READ || io->ci_type == CIT_WRITE);
+ ENTRY;
- 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));
- /* fast path for common case. */
- if (lio->lis_nr_subios != 1 && !cl_io_is_append(io)) {
+ index = lov_lsm_entry(lsm, range->cir_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;
+ /* execute it in main thread */
+ io->ci_pio = 0;
+
+ RETURN(lov_io_iter_init(env, ios));
+ }
+
+ RETURN(-ENODATA);
+ }
+
+ 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 = ~0ull;
+ next = MAX_LFS_FILESIZE;
+ }
- 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);
+ LASSERTF(range->cir_pos >= lse->lsme_extent.e_start,
+ "pos %lld, [%lld, %lld)\n", range->cir_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;
+ range->cir_count = next - range->cir_pos;
+ lio->lis_pos = range->cir_pos;
+ lio->lis_endpos = range->cir_pos + range->cir_count;
+ CDEBUG(D_VFSTRACE,
+ "stripe: {%d, %llu} range: [%llu, %llu) end: %llu, count: %zd\n",
+ index, start, lio->lis_pos, lio->lis_endpos,
+ lio->lis_io_endpos, range->cir_count);
+
+ if (!io->ci_continue) {
+ /* the last piece of IO, execute it in main thread */
+ io->ci_pio = 0;
}
+
+ if (io->ci_pio) {
+ /* it only splits IO here for parallel IO,
+ * there will be no actual IO going to occur,
+ * so it doesn't need to invoke lov_io_iter_init()
+ * to initialize sub IOs. */
+ if (!lsm_entry_inited(lsm, index)) {
+ io->ci_need_write_intent = 1;
+ RETURN(-ENODATA);
+ }
+ RETURN(0);
+ }
+
/*
* 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_setattr_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 = lio->lis_object->lo_lsm;
+ int index;
+ ENTRY;
+
+ if (cl_io_is_trunc(io) && lio->lis_pos > 0) {
+ index = lov_lsm_entry(lsm, lio->lis_pos - 1);
+ if (index > 0 && !lsm_entry_inited(lsm, index)) {
+ io->ci_need_write_intent = 1;
+ RETURN(io->ci_result = -ENODATA);
+ }
+ }
+
+ 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 *))
+ 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;
+ struct lov_io_sub *sub;
+ int rc = 0;
- 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;
+ 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;
+ parent->ci_result = sub->sub_io.ci_result;
}
RETURN(rc);
}
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 lov_io_sub *sub;
+
+ ENTRY;
+ list_for_each_entry(sub, &lio->lis_active, sub_linkage) {
+ lov_io_end_wrapper(env, &sub->sub_io);
+
+ parent->u.ci_data_version.dv_data_version +=
+ sub->sub_io.u.ci_data_version.dv_data_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)
{
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);
+ while (!list_empty(&lio->lis_active))
+ list_del_init(lio->lis_active.next);
EXIT;
}
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_lsm_entry(loo->lo_lsm, offset);
+ if (index < 0 || !lsm_entry_inited(loo->lo_lsm, index))
+ RETURN(-ENODATA);
+
+ stripe = lov_stripe_number(loo->lo_lsm, index, offset);
+
+ r0 = lov_r0(loo, index);
+ if (unlikely(r0->lo_sub[stripe] == NULL))
+ 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_lse(loo, index)->lsme_extent.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,
+ const struct cl_io_slice *ios,
enum cl_req_type crt, struct cl_2queue *queue)
{
- 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);
- lov_sub_put(sub);
- RETURN(rc);
- }
+ 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;
+ int index;
+ int rc = 0;
+ ENTRY;
- LASSERT(lio->lis_subs != NULL);
- if (alloc) {
- OBD_ALLOC_LARGE(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;
- }
+ if (lio->lis_nr_subios == 1) {
+ int idx = lio->lis_single_subio_index;
- 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);
- }
+ sub = lov_sub_get(env, lio, idx);
+ LASSERT(!IS_ERR(sub));
+ LASSERT(sub == &lio->lis_single_subio);
+ rc = cl_io_submit_rw(sub->sub_env, &sub->sub_io,
+ crt, queue);
+ RETURN(rc);
+ }
- for (stripe = 0; stripe < lio->lis_nr_subios; stripe++) {
- struct lov_io_sub *sub;
- struct cl_page_list *sub_qin = QIN(stripe);
+ cl_page_list_init(plist);
+ while (qin->pl_nr > 0) {
+ struct cl_2queue *cl2q = &lov_env_info(env)->lti_cl2q;
- if (cfs_list_empty(&sub_qin->pl_pages))
- continue;
+ cl_2queue_init(cl2q);
- 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);
- 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;
- }
+ page = cl_page_list_first(qin);
+ cl_page_list_move(&cl2q->c2_qin, qin, page);
- for (stripe = 0; stripe < lio->lis_nr_subios; stripe++) {
- struct cl_page_list *sub_qin = QIN(stripe);
+ index = lov_page_index(page);
+ while (qin->pl_nr > 0) {
+ page = cl_page_list_first(qin);
+ if (index != lov_page_index(page))
+ break;
- if (cfs_list_empty(&sub_qin->pl_pages))
- continue;
+ cl_page_list_move(&cl2q->c2_qin, qin, page);
+ }
- cl_page_list_splice(sub_qin, qin);
- }
+ 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);
+ }
- if (alloc) {
- OBD_FREE_LARGE(stripes_qin,
- sizeof(*stripes_qin) * lio->lis_nr_subios);
- } else {
- int i;
+ cl_page_list_splice(&cl2q->c2_qin, plist);
+ cl_page_list_splice(&cl2q->c2_qout, &queue->c2_qout);
+ cl_2queue_fini(env, cl2q);
- for (i = 0; i < lio->lis_nr_subios; i++) {
- struct cl_io *cio = lio->lis_subs[i].sub_io;
+ if (rc != 0)
+ break;
+ }
- 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);
- }
+ cl_page_list_splice(plist, qin);
+ cl_page_list_fini(env, plist);
- RETURN(rc);
-#undef QIN
+ RETURN(rc);
}
-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)
+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 lov_io *lio = cl2lov_io(env, ios);
- struct cl_page *sub_page = lov_sub_page(slice);
- struct lov_io_sub *sub;
- int result;
+ 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;
- 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;
+ if (lio->lis_nr_subios == 1) {
+ int idx = lio->lis_single_subio_index;
- 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);
+ 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);
+ cl_page_list_move(plist, queue, page);
+
+ index = lov_page_index(page);
+ while (queue->pl_nr > 0) {
+ page = cl_page_list_first(queue);
+ if (index != lov_page_index(page))
+ 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;
- 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));
+ ENTRY;
+
+ fio = &ios->cis_io->u.ci_fault;
+ lio = cl2lov_io(env, ios);
+ sub = lov_sub_get(env, lio, lov_page_index(fio->ft_page));
+ 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,
ENTRY;
*written = 0;
- cfs_list_for_each_entry(sub, &lio->lis_active, sub_linkage) {
- struct cl_io *subio = sub->sub_io;
+ list_for_each_entry(sub, &lio->lis_active, sub_linkage) {
+ struct cl_io *subio = &sub->sub_io;
- lov_sub_enter(sub);
lov_io_end_wrapper(sub->sub_env, subio);
- lov_sub_exit(sub);
if (subio->ci_result == 0)
*written += subio->u.ci_fsync.fi_nr_written;
.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_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_start = lov_io_start,
.cio_end = lov_io_fsync_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
+ [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_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,
static const struct cl_io_operations lov_empty_io_ops = {
.op = {
[CIT_READ] = {
-#if 0
.cio_fini = lov_empty_io_fini,
+#if 0
.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_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_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);
+ 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) {
- 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);
+ ENTRY;
+ INIT_LIST_HEAD(&lio->lis_active);
+ io->ci_result = lov_io_slice_init(lio, lov, io);
+ if (io->ci_result != 0)
+ RETURN(io->ci_result);
+
+ if (io->ci_result == 0) {
+ 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);
+ atomic_inc(&lov->lo_active_ios);
+ }
+ }
+ RETURN(io->ci_result);
}
int lov_io_init_empty(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;
- lio->lis_lsm = NULL;
+ lio->lis_object = lov;
switch (io->ci_type) {
default:
LBUG();
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);
+ 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 != 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_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);
+}
/** @} lov */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff