-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
- * Author: Andreas Dilger <adilger@clusterfs.com>
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * This file is part of Lustre, http://www.lustre.org.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
*
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
*
- * Lustre is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2015, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/lov/lov_pack.c
*
* (Un)packing of OST/MDS requests
*
+ * Author: Andreas Dilger <adilger@clusterfs.com>
*/
-#define DEBUG_SUBSYSTEM S_LLITE
-#ifndef __KERNEL__
-#include <liblustre.h>
-#endif
+#define DEBUG_SUBSYSTEM S_LOV
+
+#include <lustre/lustre_idl.h>
+#include <lustre/lustre_user.h>
-#include <linux/lustre_net.h>
-#include <linux/obd.h>
-#include <linux/obd_lov.h>
-#include <linux/obd_class.h>
-#include <linux/obd_support.h>
-#include <linux/lustre_user.h>
+#include <lustre_net.h>
+#include <lustre_swab.h>
+#include <obd.h>
+#include <obd_class.h>
+#include <obd_support.h>
+#include "lov_cl_internal.h"
#include "lov_internal.h"
-void lov_dump_lmm_v0(int level, struct lov_mds_md_v0 *lmm)
+void lov_dump_lmm_common(int level, void *lmmp)
{
- int i, num_ost, stripe, idx;
-
- num_ost = le32_to_cpu(lmm->lmm_ost_count);
- idx = le32_to_cpu(lmm->lmm_stripe_offset);
- CDEBUG(level, "objid "LPX64", magic 0x%08X, ost_count %u\n",
- le64_to_cpu(lmm->lmm_object_id), le32_to_cpu(lmm->lmm_magic),
- num_ost);
- CDEBUG(level,"stripe_size %u, stripe_count %u, stripe_offset %u\n",
- le32_to_cpu(lmm->lmm_stripe_size),
- le32_to_cpu(lmm->lmm_stripe_count), idx);
- for (i = stripe = 0; i < le32_to_cpu(lmm->lmm_ost_count); i++, idx++) {
- idx %= num_ost;
- if (lmm->lmm_objects[idx].l_object_id == 0)
- continue;
- CDEBUG(level, "stripe %u idx %u subobj "LPX64"\n", stripe, idx,
- le64_to_cpu(lmm->lmm_objects[idx].l_object_id));
- stripe++;
- }
+ struct lov_mds_md *lmm = lmmp;
+ struct ost_id oi;
+
+ lmm_oi_le_to_cpu(&oi, &lmm->lmm_oi);
+ CDEBUG(level, "objid "DOSTID", magic 0x%08x, pattern %#x\n",
+ POSTID(&oi), le32_to_cpu(lmm->lmm_magic),
+ le32_to_cpu(lmm->lmm_pattern));
+ CDEBUG(level, "stripe_size %u, stripe_count %u, layout_gen %u\n",
+ le32_to_cpu(lmm->lmm_stripe_size),
+ le16_to_cpu(lmm->lmm_stripe_count),
+ le16_to_cpu(lmm->lmm_layout_gen));
}
-void lov_dump_lmm_v1(int level, struct lov_mds_md_v1 *lmm)
+static void lov_dump_lmm_objects(int level, struct lov_ost_data *lod,
+ int stripe_count)
{
- struct lov_ost_data_v1 *lod;
- int i;
-
- CDEBUG(level, "objid "LPX64", magic 0x%08X, pattern %#X\n",
- le64_to_cpu(lmm->lmm_object_id), le32_to_cpu(lmm->lmm_magic),
- le32_to_cpu(lmm->lmm_pattern));
- CDEBUG(level,"stripe_size %u, stripe_count %u\n",
- le32_to_cpu(lmm->lmm_stripe_size),
- le32_to_cpu(lmm->lmm_stripe_count));
- for (i = 0, lod = lmm->lmm_objects;
- i < le32_to_cpu(lmm->lmm_stripe_count); i++, lod++)
- CDEBUG(level, "stripe %u idx %u subobj "LPX64"/"LPX64"\n",
- i, le32_to_cpu(lod->l_ost_idx),
- le64_to_cpu(lod->l_object_gr),
- le64_to_cpu(lod->l_object_id));
-}
+ int i;
-#define LMM_ASSERT(test) \
-do { \
- if (!(test)) lov_dump_lmm(D_ERROR, lmm); \
- LASSERT(test); /* so we know what assertion failed */ \
-} while(0)
+ if (stripe_count > LOV_V1_INSANE_STRIPE_COUNT) {
+ CDEBUG(level, "bad stripe_count %u > max_stripe_count %u\n",
+ stripe_count, LOV_V1_INSANE_STRIPE_COUNT);
+ return;
+ }
-/* Pack LOV object metadata for disk storage. It is packed in LE byte
- * order and is opaque to the networking layer.
- *
- * XXX In the future, this will be enhanced to get the EA size from the
- * underlying OSC device(s) to get their EA sizes so we can stack
- * LOVs properly. For now lov_mds_md_size() just assumes one obd_id
- * per stripe.
- */
-int lov_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
- struct lov_stripe_md *lsm)
-{
- struct obd_device *obd = class_exp2obd(exp);
- struct lov_obd *lov = &obd->u.lov;
- struct lov_oinfo *loi;
- struct lov_mds_md *lmm;
- int stripe_count = lov->desc.ld_tgt_count;
- int lmm_size;
- int i;
- ENTRY;
-
- if (lsm) {
- if (lsm->lsm_magic != LOV_MAGIC) {
- CERROR("bad mem LOV MAGIC: 0x%08X != 0x%08X\n",
- lsm->lsm_magic, LOV_MAGIC);
- RETURN(-EINVAL);
- }
- stripe_count = lsm->lsm_stripe_count;
- }
-
- /* XXX LOV STACKING call into osc for sizes */
- lmm_size = lov_mds_md_size(stripe_count);
-
- if (!lmmp)
- RETURN(lmm_size);
-
- if (*lmmp && !lsm) {
- stripe_count = le32_to_cpu((*lmmp)->lmm_stripe_count);
- OBD_FREE(*lmmp, lov_mds_md_size(stripe_count));
- *lmmp = NULL;
- RETURN(0);
- }
-
- if (!*lmmp) {
- OBD_ALLOC(*lmmp, lmm_size);
- if (!*lmmp)
- RETURN(-ENOMEM);
- }
-
- lmm = *lmmp;
- lmm->lmm_magic = cpu_to_le32(LOV_MAGIC); /* only write new format */
-
- if (!lsm)
- RETURN(lmm_size);
-
- lmm->lmm_object_id = cpu_to_le64(lsm->lsm_object_id);
- lmm->lmm_object_gr = cpu_to_le64(lsm->lsm_object_gr);
- lmm->lmm_stripe_size = cpu_to_le32(lsm->lsm_stripe_size);
- lmm->lmm_stripe_count = cpu_to_le32(stripe_count);
- lmm->lmm_pattern = cpu_to_le32(lsm->lsm_pattern);
-
- for (i = 0, loi = lsm->lsm_oinfo; i < stripe_count; i++, loi++) {
- /* XXX LOV STACKING call down to osc_packmd() to do packing */
- LASSERT(loi->loi_id);
- lmm->lmm_objects[i].l_object_id = cpu_to_le64(loi->loi_id);
- lmm->lmm_objects[i].l_object_gr = cpu_to_le64(loi->loi_gr);
- lmm->lmm_objects[i].l_ost_gen = cpu_to_le32(loi->loi_ost_gen);
- lmm->lmm_objects[i].l_ost_idx = cpu_to_le32(loi->loi_ost_idx);
- }
-
- RETURN(lmm_size);
+ for (i = 0; i < stripe_count; ++i, ++lod) {
+ struct ost_id oi;
+
+ ostid_le_to_cpu(&lod->l_ost_oi, &oi);
+ CDEBUG(level, "stripe %u idx %u subobj "DOSTID"\n", i,
+ le32_to_cpu(lod->l_ost_idx), POSTID(&oi));
+ }
}
-int lov_get_stripecnt(struct lov_obd *lov, int stripe_count)
+void lov_dump_lmm_v1(int level, struct lov_mds_md_v1 *lmm)
{
- if (!stripe_count)
- stripe_count = lov->desc.ld_default_stripe_count;
- if (!stripe_count || stripe_count > lov->desc.ld_active_tgt_count)
- stripe_count = lov->desc.ld_active_tgt_count;
+ lov_dump_lmm_common(level, lmm);
+ lov_dump_lmm_objects(level, lmm->lmm_objects,
+ le16_to_cpu(lmm->lmm_stripe_count));
+}
- return stripe_count;
+void lov_dump_lmm_v3(int level, struct lov_mds_md_v3 *lmm)
+{
+ lov_dump_lmm_common(level, lmm);
+ CDEBUG(level,"pool_name "LOV_POOLNAMEF"\n", lmm->lmm_pool_name);
+ lov_dump_lmm_objects(level, lmm->lmm_objects,
+ le16_to_cpu(lmm->lmm_stripe_count));
}
-static int lov_verify_lmm_v0(struct lov_mds_md_v0 *lmm, int lmm_bytes,
- int *stripe_count)
+void lov_dump_lmm(int level, void *lmm)
{
- if (lmm_bytes < sizeof(*lmm)) {
- CERROR("lov_mds_md too small: %d, need at least %d\n",
- lmm_bytes, (int)sizeof(*lmm));
- return -EINVAL;
- }
-
- *stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
-
- if (*stripe_count == 0 ||
- *stripe_count > le32_to_cpu(lmm->lmm_ost_count)) {
- CERROR("bad stripe count %d\n", *stripe_count);
- lov_dump_lmm_v0(D_WARNING, lmm);
- return -EINVAL;
- }
-
- if (lmm_bytes < lov_mds_md_v0_size(*stripe_count)) {
- CERROR("LOV EA too small: %d, need %d\n",
- lmm_bytes, lov_mds_md_size(*stripe_count));
- lov_dump_lmm_v0(D_WARNING, lmm);
- return -EINVAL;
- }
-
- if (lmm->lmm_object_id == 0) {
- CERROR("zero object id\n");
- lov_dump_lmm_v0(D_WARNING, lmm);
- return -EINVAL;
- }
-
- if (le32_to_cpu(lmm->lmm_stripe_offset) >
- le32_to_cpu(lmm->lmm_ost_count)) {
- CERROR("stripe offset %d more than number of OSTs %d\n",
- le32_to_cpu(lmm->lmm_stripe_offset),
- le32_to_cpu(lmm->lmm_ost_count));
- lov_dump_lmm_v0(D_WARNING, lmm);
- return -EINVAL;
- }
-
- if (lmm->lmm_stripe_size == 0) {
- CERROR("zero stripe size\n");
- lov_dump_lmm_v0(D_WARNING, lmm);
- return -EINVAL;
- }
-
- return 0;
+ int magic;
+
+ magic = le32_to_cpu(((struct lov_mds_md *)lmm)->lmm_magic);
+ switch (magic) {
+ case LOV_MAGIC_V1:
+ lov_dump_lmm_v1(level, (struct lov_mds_md_v1 *)lmm);
+ break;
+ case LOV_MAGIC_V3:
+ lov_dump_lmm_v3(level, (struct lov_mds_md_v3 *)lmm);
+ break;
+ default:
+ CDEBUG(level, "unrecognized lmm_magic %x, assuming %x\n",
+ magic, LOV_MAGIC_V1);
+ lov_dump_lmm_common(level, lmm);
+ break;
+ }
}
-static int lov_verify_lmm_v1(struct lov_mds_md_v1 *lmm, int lmm_bytes,
- int *stripe_count)
+/**
+ * Pack LOV striping metadata for disk storage format (in little
+ * endian byte order).
+ *
+ * This follows the getxattr() conventions. If \a buf_size is zero
+ * then return the size needed. If \a buf_size is too small then
+ * return -ERANGE. Otherwise return the size of the result.
+ */
+ssize_t lov_lsm_pack_v1v3(const struct lov_stripe_md *lsm, void *buf,
+ size_t buf_size)
{
- if (lmm_bytes < sizeof(*lmm)) {
- CERROR("lov_mds_md too small: %d, need at least %d\n",
- lmm_bytes, (int)sizeof(*lmm));
- return -EINVAL;
- }
-
- if (lmm->lmm_magic != le32_to_cpu(LOV_MAGIC_V1)) {
- CERROR("bad disk LOV MAGIC: 0x%08X\n",
- le32_to_cpu(*(__u32 *)lmm));
- return -EINVAL;
- }
-
- *stripe_count = le32_to_cpu(lmm->lmm_stripe_count);
-
- if (*stripe_count == 0) {
- CERROR("bad stripe count %d\n", *stripe_count);
- lov_dump_lmm_v1(D_WARNING, lmm);
- return -EINVAL;
- }
-
- if (lmm_bytes < lov_mds_md_size(*stripe_count)) {
- CERROR("LOV EA too small: %d, need %d\n",
- lmm_bytes, lov_mds_md_size(*stripe_count));
- lov_dump_lmm_v1(D_WARNING, lmm);
- return -EINVAL;
- }
-
- if (lmm->lmm_object_id == 0) {
- CERROR("zero object id\n");
- lov_dump_lmm_v1(D_WARNING, lmm);
- return -EINVAL;
- }
-
- if (lmm->lmm_pattern != cpu_to_le32(LOV_PATTERN_RAID0)) {
- CERROR("bad striping pattern\n");
- lov_dump_lmm_v1(D_WARNING, lmm);
- return -EINVAL;
- }
-
- if (lmm->lmm_stripe_size == 0 ||
- (__u64)le32_to_cpu(lmm->lmm_stripe_size) * *stripe_count > ~0UL) {
- CERROR("bad stripe size %u\n",
- le32_to_cpu(lmm->lmm_stripe_size));
- lov_dump_lmm_v1(D_WARNING, lmm);
- return -EINVAL;
- }
-
- return 0;
+ struct lov_mds_md_v1 *lmmv1 = buf;
+ struct lov_mds_md_v3 *lmmv3 = buf;
+ struct lov_ost_data_v1 *lmm_objects;
+ size_t lmm_size;
+ unsigned int i;
+ ENTRY;
+
+ lmm_size = lov_mds_md_size(lsm->lsm_entries[0]->lsme_stripe_count,
+ lsm->lsm_magic);
+ if (buf_size == 0)
+ RETURN(lmm_size);
+
+ if (buf_size < lmm_size)
+ RETURN(-ERANGE);
+
+ /* lmmv1 and lmmv3 point to the same struct and have the
+ * same first fields
+ */
+ lmmv1->lmm_magic = cpu_to_le32(lsm->lsm_magic);
+ lmm_oi_cpu_to_le(&lmmv1->lmm_oi, &lsm->lsm_oi);
+ lmmv1->lmm_stripe_size = cpu_to_le32(
+ lsm->lsm_entries[0]->lsme_stripe_size);
+ lmmv1->lmm_stripe_count = cpu_to_le16(
+ lsm->lsm_entries[0]->lsme_stripe_count);
+ lmmv1->lmm_pattern = cpu_to_le32(lsm->lsm_entries[0]->lsme_pattern);
+ lmmv1->lmm_layout_gen = cpu_to_le16(lsm->lsm_layout_gen);
+
+ if (lsm->lsm_magic == LOV_MAGIC_V3) {
+ CLASSERT(sizeof(lsm->lsm_entries[0]->lsme_pool_name) ==
+ sizeof(lmmv3->lmm_pool_name));
+ strlcpy(lmmv3->lmm_pool_name,
+ lsm->lsm_entries[0]->lsme_pool_name,
+ sizeof(lmmv3->lmm_pool_name));
+ lmm_objects = lmmv3->lmm_objects;
+ } else {
+ lmm_objects = lmmv1->lmm_objects;
+ }
+
+ if (lsm->lsm_is_released)
+ RETURN(lmm_size);
+
+ for (i = 0; i < lsm->lsm_entries[0]->lsme_stripe_count; i++) {
+ struct lov_oinfo *loi = lsm->lsm_entries[0]->lsme_oinfo[i];
+
+ ostid_cpu_to_le(&loi->loi_oi, &lmm_objects[i].l_ost_oi);
+ lmm_objects[i].l_ost_gen = cpu_to_le32(loi->loi_ost_gen);
+ lmm_objects[i].l_ost_idx = cpu_to_le32(loi->loi_ost_idx);
+ }
+
+ RETURN(lmm_size);
}
-static int lov_verify_lmm(void *lmm, int lmm_bytes, int *stripe_count)
+ssize_t lov_lsm_pack(const struct lov_stripe_md *lsm, void *buf,
+ size_t buf_size)
{
- switch (le32_to_cpu(*(__u32 *)lmm)) {
- case LOV_MAGIC_V1:
- return lov_verify_lmm_v1(lmm, lmm_bytes, stripe_count);
- case LOV_MAGIC_V0:
- return lov_verify_lmm_v0(lmm, lmm_bytes, stripe_count);
- default:
- CERROR("bad disk LOV MAGIC: 0x%08X\n",
- le32_to_cpu(*(__u32 *)lmm));
- return -EINVAL;
- }
+ struct lov_comp_md_v1 *lcmv1 = buf;
+ struct lov_comp_md_entry_v1 *lcme;
+ struct lov_ost_data_v1 *lmm_objects;
+ size_t lmm_size;
+ unsigned int entry;
+ unsigned int offset;
+ unsigned int size;
+ unsigned int i;
+ ENTRY;
+
+ if (lsm->lsm_magic == LOV_MAGIC_V1 || lsm->lsm_magic == LOV_MAGIC_V3)
+ return lov_lsm_pack_v1v3(lsm, buf, buf_size);
+
+ lmm_size = lov_comp_md_size(lsm);
+ if (buf_size == 0)
+ RETURN(lmm_size);
+
+ if (buf_size < lmm_size)
+ RETURN(-ERANGE);
+
+ lcmv1->lcm_magic = cpu_to_le32(lsm->lsm_magic);
+ lcmv1->lcm_size = cpu_to_le32(lmm_size);
+ lcmv1->lcm_layout_gen = cpu_to_le32(lsm->lsm_layout_gen);
+ lcmv1->lcm_entry_count = cpu_to_le16(lsm->lsm_entry_count);
+
+ offset = sizeof(*lcmv1) + sizeof(*lcme) * lsm->lsm_entry_count;
+
+ for (entry = 0; entry < lsm->lsm_entry_count; entry++) {
+ struct lov_stripe_md_entry *lsme;
+ struct lov_mds_md *lmm;
+ __u16 stripecnt;
+
+ lsme = lsm->lsm_entries[entry];
+ lcme = &lcmv1->lcm_entries[entry];
+
+ lcme->lcme_id = cpu_to_le32(lsme->lsme_id);
+ lcme->lcme_flags = cpu_to_le32(lsme->lsme_flags);
+ lcme->lcme_extent.e_start =
+ cpu_to_le64(lsme->lsme_extent.e_start);
+ lcme->lcme_extent.e_end =
+ cpu_to_le64(lsme->lsme_extent.e_end);
+ lcme->lcme_offset = cpu_to_le32(offset);
+
+ lmm = (struct lov_mds_md *)((char *)lcmv1 + offset);
+ lmm->lmm_magic = cpu_to_le32(lsme->lsme_magic);
+ /* lmm->lmm_oi not set */
+ lmm->lmm_pattern = cpu_to_le32(lsme->lsme_pattern);
+ lmm->lmm_stripe_size = cpu_to_le32(lsme->lsme_stripe_size);
+ lmm->lmm_stripe_count = cpu_to_le16(lsme->lsme_stripe_count);
+ lmm->lmm_layout_gen = cpu_to_le16(lsme->lsme_layout_gen);
+
+ if (lsme->lsme_magic == LOV_MAGIC_V3) {
+ struct lov_mds_md_v3 *lmmv3 =
+ (struct lov_mds_md_v3 *)lmm;
+
+ strlcpy(lmmv3->lmm_pool_name, lsme->lsme_pool_name,
+ sizeof(lmmv3->lmm_pool_name));
+ lmm_objects = lmmv3->lmm_objects;
+ } else {
+ lmm_objects =
+ ((struct lov_mds_md_v1 *)lmm)->lmm_objects;
+ }
+
+ if (lsme_inited(lsme) &&
+ !(lsme->lsme_pattern & LOV_PATTERN_F_RELEASED))
+ stripecnt = lsme->lsme_stripe_count;
+ else
+ stripecnt = 0;
+
+ for (i = 0; i < stripecnt; i++) {
+ struct lov_oinfo *loi = lsme->lsme_oinfo[i];
+
+ ostid_cpu_to_le(&loi->loi_oi, &lmm_objects[i].l_ost_oi);
+ lmm_objects[i].l_ost_gen =
+ cpu_to_le32(loi->loi_ost_gen);
+ lmm_objects[i].l_ost_idx =
+ cpu_to_le32(loi->loi_ost_idx);
+ }
+
+ size = lov_mds_md_size(stripecnt, lsme->lsme_magic);
+ lcme->lcme_size = cpu_to_le32(size);
+ offset += size;
+ } /* for each layout component */
+
+ RETURN(lmm_size);
}
-int lov_alloc_memmd(struct lov_stripe_md **lsmp, int stripe_count, int pattern)
+/* Find the max stripecount we should use */
+__u16 lov_get_stripecnt(struct lov_obd *lov, __u32 magic, __u16 stripe_count)
{
- int lsm_size = lov_stripe_md_size(stripe_count);
- struct lov_oinfo *loi;
- int i;
+ __u32 max_stripes = LOV_MAX_STRIPE_COUNT_OLD;
- OBD_ALLOC(*lsmp, lsm_size);
- if (!*lsmp)
- return -ENOMEM;
+ if (!stripe_count)
+ stripe_count = lov->desc.ld_default_stripe_count;
+ if (stripe_count > lov->desc.ld_active_tgt_count)
+ stripe_count = lov->desc.ld_active_tgt_count;
+ if (!stripe_count)
+ stripe_count = 1;
- (*lsmp)->lsm_magic = LOV_MAGIC;
- (*lsmp)->lsm_stripe_count = stripe_count;
- (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES * stripe_count;
- (*lsmp)->lsm_pattern = pattern;
- (*lsmp)->lsm_oinfo[0].loi_ost_idx = ~0;
+ /* stripe count is based on whether ldiskfs can handle
+ * larger EA sizes */
+ if (lov->lov_ocd.ocd_connect_flags & OBD_CONNECT_MAX_EASIZE &&
+ lov->lov_ocd.ocd_max_easize)
+ max_stripes = lov_mds_md_max_stripe_count(
+ lov->lov_ocd.ocd_max_easize, magic);
- for (i = 0, loi = (*lsmp)->lsm_oinfo; i < stripe_count; i++, loi++)
- loi_init(loi);
+ if (stripe_count > max_stripes)
+ stripe_count = max_stripes;
- return lsm_size;
+ return stripe_count;
}
-void lov_free_memmd(struct lov_stripe_md **lsmp)
+int lov_free_memmd(struct lov_stripe_md **lsmp)
{
- OBD_FREE(*lsmp, lov_stripe_md_size((*lsmp)->lsm_stripe_count));
- *lsmp = NULL;
-}
+ struct lov_stripe_md *lsm = *lsmp;
+ int refc;
-int lov_unpackmd_v0(struct lov_obd *lov, struct lov_stripe_md *lsm,
- struct lov_mds_md_v0 *lmm)
-{
- struct lov_oinfo *loi;
- int i, ost_offset, ost_count;
-
- lsm->lsm_object_id = le64_to_cpu(lmm->lmm_object_id);
- /* lsm->lsm_object_gr = 0; implicit */
- lsm->lsm_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
- lsm->lsm_pattern = LOV_PATTERN_RAID0;
- ost_offset = le32_to_cpu(lmm->lmm_stripe_offset);
- ost_count = le16_to_cpu(lmm->lmm_ost_count);
-
- for (i = 0, loi = lsm->lsm_oinfo; i < ost_count; i++, ost_offset++) {
- ost_offset %= ost_count;
-
- if (!lmm->lmm_objects[ost_offset].l_object_id)
- continue;
-
- loi->loi_id =
- le64_to_cpu(lmm->lmm_objects[ost_offset].l_object_id);
- /* loi->loi_gr = 0; implicit */
- loi->loi_ost_idx = ost_offset;
- /* loi->loi_ost_gen = 0; implicit */
- loi++;
- }
-
- if (loi - lsm->lsm_oinfo != lsm->lsm_stripe_count) {
- CERROR("missing objects in lmm struct\n");
- lov_dump_lmm_v0(D_WARNING, lmm);
- return -EINVAL;
- }
-
- return 0;
-}
+ *lsmp = NULL;
+ refc = atomic_dec_return(&lsm->lsm_refc);
+ LASSERT(refc >= 0);
+ if (refc == 0)
+ lsm_free(lsm);
-int lov_unpackmd_v1(struct lov_obd *lov, struct lov_stripe_md *lsm,
- struct lov_mds_md_v1 *lmm)
-{
- struct lov_oinfo *loi;
- int i;
-
- lsm->lsm_object_id = le64_to_cpu(lmm->lmm_object_id);
- lsm->lsm_object_gr = le64_to_cpu(lmm->lmm_object_gr);
- lsm->lsm_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
- lsm->lsm_pattern = le32_to_cpu(lmm->lmm_pattern);
-
- for (i = 0, loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++) {
- /* XXX LOV STACKING call down to osc_unpackmd() */
- loi->loi_id = le64_to_cpu(lmm->lmm_objects[i].l_object_id);
- loi->loi_gr = le64_to_cpu(lmm->lmm_objects[i].l_object_gr);
- loi->loi_ost_idx = le32_to_cpu(lmm->lmm_objects[i].l_ost_idx);
- loi->loi_ost_gen = le32_to_cpu(lmm->lmm_objects[i].l_ost_gen);
- if (loi->loi_ost_idx > lov->desc.ld_tgt_count) {
- CERROR("OST index %d more than OST count %d\n",
- loi->loi_ost_idx, lov->desc.ld_tgt_count);
- lov_dump_lmm_v1(D_WARNING, lmm);
- return -EINVAL;
- }
- loi++;
- }
-
- return 0;
+ return refc;
}
/* Unpack LOV object metadata from disk storage. It is packed in LE byte
* order and is opaque to the networking layer.
*/
-int lov_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
- struct lov_mds_md *lmm, int lmm_bytes)
+struct lov_stripe_md *lov_unpackmd(struct lov_obd *lov, void *buf,
+ size_t buf_size)
{
- struct obd_device *obd = class_exp2obd(exp);
- struct lov_obd *lov = &obd->u.lov;
- int rc = 0, stripe_count, lsm_size;
- ENTRY;
-
- /* If passed an MDS struct use values from there, otherwise defaults */
- if (lmm) {
- rc = lov_verify_lmm(lmm, lmm_bytes, &stripe_count);
- if (rc)
- RETURN(rc);
- } else {
- stripe_count = lov_get_stripecnt(lov, 0);
- }
-
- /* If we aren't passed an lsmp struct, we just want the size */
- if (!lsmp)
- /* XXX LOV STACKING call into osc for sizes */
- RETURN(lov_stripe_md_size(stripe_count));
-
- /* If we are passed an allocated struct but nothing to unpack, free */
- if (*lsmp && !lmm) {
- lov_free_memmd(lsmp);
- RETURN(0);
- }
-
- lsm_size = lov_alloc_memmd(lsmp, stripe_count, LOV_PATTERN_RAID0);
- if (lsm_size < 0)
- RETURN(lsm_size);
-
- /* If we are passed a pointer but nothing to unpack, we only alloc */
- if (!lmm)
- RETURN(lsm_size);
-
- switch (le32_to_cpu(lmm->lmm_magic)) {
- case LOV_MAGIC_V1:
- rc = lov_unpackmd_v1(lov, *lsmp, lmm);
- break;
- case LOV_MAGIC_V0:
- rc = lov_unpackmd_v0(lov, *lsmp, (void *)lmm);
- break;
- }
-
- if (rc) {
- lov_free_memmd(lsmp);
- RETURN(rc);
- }
-
- RETURN(lsm_size);
-}
+ const struct lsm_operations *op;
+ struct lov_stripe_md *lsm;
+ u32 magic;
+ ENTRY;
-/* Configure object striping information on a new file.
- *
- * @lmmu is a pointer to a user struct with one or more of the fields set to
- * indicate the application preference: lmm_stripe_count, lmm_stripe_size,
- * lmm_stripe_offset, and lmm_stripe_pattern. lmm_magic must be LOV_MAGIC.
- * @lsmp is a pointer to an in-core stripe MD that needs to be filled in.
- */
-int lov_setstripe(struct obd_export *exp, struct lov_stripe_md **lsmp,
- struct lov_user_md *lump)
-{
- struct obd_device *obd = class_exp2obd(exp);
- struct lov_obd *lov = &obd->u.lov;
- struct lov_user_md lum;
- int stripe_count;
- int rc;
- ENTRY;
-
- rc = copy_from_user(&lum, lump, sizeof(lum));
- if (rc)
- RETURN(-EFAULT);
-
- if (lum.lmm_magic != LOV_USER_MAGIC) {
- CDEBUG(D_IOCTL, "bad userland LOV MAGIC: %#08x != %#08x\n",
- lum.lmm_magic, LOV_USER_MAGIC);
- RETURN(-EINVAL);
- }
-
- if (lum.lmm_pattern == 0) {
- lum.lmm_pattern = lov->desc.ld_pattern ?
- lov->desc.ld_pattern : LOV_PATTERN_RAID0;
- }
-
- if (lum.lmm_pattern != LOV_PATTERN_RAID0) {
- CDEBUG(D_IOCTL, "bad userland stripe pattern: %#x\n",
- lum.lmm_pattern);
- RETURN(-EINVAL);
- }
-
- if (lum.lmm_stripe_size & (PAGE_SIZE - 1)) {
- CDEBUG(D_IOCTL, "stripe size %u not multiple of %lu\n",
- lum.lmm_stripe_size, PAGE_SIZE);
- RETURN(-EINVAL);
- }
-
- if ((lum.lmm_stripe_offset >= lov->desc.ld_active_tgt_count) &&
- (lum.lmm_stripe_offset != (typeof(lum.lmm_stripe_offset))(-1))) {
- CDEBUG(D_IOCTL, "stripe offset %u > number of active OSTs %u\n",
- lum.lmm_stripe_offset, lov->desc.ld_active_tgt_count);
- RETURN(-EINVAL);
- }
- stripe_count = lov_get_stripecnt(lov, lum.lmm_stripe_count);
-
- if ((__u64)lum.lmm_stripe_size * stripe_count > ~0UL) {
- CDEBUG(D_IOCTL, "stripe width %ux%u > %lu on 32-bit system\n",
- lum.lmm_stripe_size, (int)lum.lmm_stripe_count, ~0UL);
- RETURN(-EINVAL);
- }
-
- rc = lov_alloc_memmd(lsmp, stripe_count, lum.lmm_pattern);
-
- if (rc < 0)
- RETURN(rc);
-
- (*lsmp)->lsm_oinfo[0].loi_ost_idx = lum.lmm_stripe_offset;
- (*lsmp)->lsm_stripe_size = lum.lmm_stripe_size;
-
- RETURN(0);
+ if (buf_size < sizeof(magic))
+ RETURN(ERR_PTR(-EINVAL));
+
+ magic = le32_to_cpu(*(u32 *)buf);
+ op = lsm_op_find(magic);
+ if (op == NULL)
+ RETURN(ERR_PTR(-EINVAL));
+
+ lsm = op->lsm_unpackmd(lov, buf, buf_size);
+
+ RETURN(lsm);
}
/* Retrieve object striping information.
* @lump is a pointer to an in-core struct with lmm_ost_count indicating
* the maximum number of OST indices which will fit in the user buffer.
* lmm_magic must be LOV_USER_MAGIC.
+ *
+ * If @size > 0, User specified limited buffer size, usually the buffer is from
+ * ll_lov_setstripe(), and the buffer can only hold basic layout template info.
*/
-int lov_getstripe(struct obd_export *exp, struct lov_stripe_md *lsm,
- struct lov_user_md *lump)
+int lov_getstripe(const struct lu_env *env, struct lov_object *obj,
+ struct lov_stripe_md *lsm, struct lov_user_md __user *lump,
+ size_t size)
{
- struct lov_user_md lum;
- struct lov_mds_md *lmmk = NULL;
- int rc, lmm_size;
- ENTRY;
-
- if (!lsm)
- RETURN(-ENODATA);
-
- rc = copy_from_user(&lum, lump, sizeof(lum));
- if (rc)
- RETURN(-EFAULT);
-
- if (lum.lmm_magic != LOV_USER_MAGIC)
- RETURN(-EINVAL);
-
- rc = lov_packmd(exp, &lmmk, lsm);
- if (rc < 0)
- RETURN(rc);
- lmm_size = rc;
- rc = 0;
-
- /* FIXME: Bug 1185 - copy fields properly when structs change */
- LASSERT(sizeof(lum) == sizeof(*lmmk));
- LASSERT(sizeof(lum.lmm_objects[0]) == sizeof(lmmk->lmm_objects[0]));
-
- /* User wasn't expecting this many OST entries */
- if (lum.lmm_stripe_count < lmmk->lmm_stripe_count)
- rc = -EOVERFLOW;
- else if (copy_to_user(lump, lmmk, lmm_size))
- rc = -EFAULT;
-
- obd_free_diskmd(exp, &lmmk);
-
- RETURN(rc);
+ /* we use lov_user_md_v3 because it is larger than lov_user_md_v1 */
+ struct lov_mds_md *lmmk, *lmm;
+ struct lov_user_md_v1 lum;
+ size_t lmmk_size;
+ ssize_t lmm_size, lum_size = 0;
+ static bool printed;
+ int rc = 0;
+ ENTRY;
+
+ if (lsm->lsm_magic != LOV_MAGIC_V1 && lsm->lsm_magic != LOV_MAGIC_V3 &&
+ lsm->lsm_magic != LOV_MAGIC_COMP_V1) {
+ CERROR("bad LSM MAGIC: 0x%08X != 0x%08X nor 0x%08X\n",
+ lsm->lsm_magic, LOV_MAGIC_V1, LOV_MAGIC_V3);
+ GOTO(out, rc = -EIO);
+ }
+
+ if (!printed) {
+ LCONSOLE_WARN("%s: using old ioctl(LL_IOC_LOV_GETSTRIPE) on "
+ DFID", use llapi_layout_get_by_path()\n",
+ current->comm,
+ PFID(&obj->lo_cl.co_lu.lo_header->loh_fid));
+ printed = true;
+ }
+
+ lmmk_size = lov_comp_md_size(lsm);
+
+ OBD_ALLOC_LARGE(lmmk, lmmk_size);
+ if (lmmk == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ lmm_size = lov_lsm_pack(lsm, lmmk, lmmk_size);
+ if (lmm_size < 0)
+ GOTO(out_free, rc = lmm_size);
+
+ if (cpu_to_le32(LOV_MAGIC) != LOV_MAGIC) {
+ if (lmmk->lmm_magic == cpu_to_le32(LOV_MAGIC_V1) ||
+ lmmk->lmm_magic == cpu_to_le32(LOV_MAGIC_V3)) {
+ lustre_swab_lov_mds_md(lmmk);
+ lustre_swab_lov_user_md_objects(
+ (struct lov_user_ost_data *)lmmk->lmm_objects,
+ lmmk->lmm_stripe_count);
+ } else if (lmmk->lmm_magic == cpu_to_le32(LOV_MAGIC_COMP_V1)) {
+ lustre_swab_lov_comp_md_v1(
+ (struct lov_comp_md_v1 *)lmmk);
+ }
+ }
+
+ /* Legacy appication passes limited buffer, we need to figure out
+ * the user buffer size by the passed in lmm_stripe_count. */
+ if (copy_from_user(&lum, lump, sizeof(struct lov_user_md_v1)))
+ GOTO(out_free, rc = -EFAULT);
+
+ if (lum.lmm_magic == LOV_USER_MAGIC_V1 ||
+ lum.lmm_magic == LOV_USER_MAGIC_V3)
+ lum_size = lov_user_md_size(lum.lmm_stripe_count,
+ lum.lmm_magic);
+
+ if (lum_size != 0) {
+ struct lov_mds_md *comp_md = lmmk;
+
+ /* Legacy app (ADIO for instance) treats the layout as V1/V3
+ * blindly, we'd return a reasonable V1/V3 for them. */
+ if (lmmk->lmm_magic == LOV_MAGIC_COMP_V1) {
+ struct lov_comp_md_v1 *comp_v1;
+ struct cl_object *cl_obj;
+ struct cl_attr attr;
+ int i;
+
+ attr.cat_size = 0;
+ cl_obj = cl_object_top(&obj->lo_cl);
+ cl_object_attr_get(env, cl_obj, &attr);
+
+ /* return the last instantiated component if file size
+ * is non-zero, otherwise, return the last component.*/
+ comp_v1 = (struct lov_comp_md_v1 *)lmmk;
+ i = attr.cat_size == 0 ? comp_v1->lcm_entry_count : 0;
+ for (; i < comp_v1->lcm_entry_count; i++) {
+ if (!(comp_v1->lcm_entries[i].lcme_flags &
+ LCME_FL_INIT))
+ break;
+ }
+ if (i > 0)
+ i--;
+ comp_md = (struct lov_mds_md *)((char *)comp_v1 +
+ comp_v1->lcm_entries[i].lcme_offset);
+ }
+
+ lmm = comp_md;
+ lmm_size = lum_size;
+ } else {
+ lmm = lmmk;
+ lmm_size = lmmk_size;
+ }
+ /**
+ * User specified limited buffer size, usually the buffer is
+ * from ll_lov_setstripe(), and the buffer can only hold basic
+ * layout template info.
+ */
+ if (size == 0 || size > lmm_size)
+ size = lmm_size;
+ if (copy_to_user(lump, lmm, size))
+ GOTO(out_free, rc = -EFAULT);
+
+out_free:
+ OBD_FREE_LARGE(lmmk, lmmk_size);
+out:
+ RETURN(rc);
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff