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Diffstat (limited to 'drivers/staging/lustre/lustre/obdecho/echo_client.c')
-rw-r--r--drivers/staging/lustre/lustre/obdecho/echo_client.c3223
1 files changed, 3223 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/obdecho/echo_client.c b/drivers/staging/lustre/lustre/obdecho/echo_client.c
new file mode 100644
index 000000000000..184195fde621
--- /dev/null
+++ b/drivers/staging/lustre/lustre/obdecho/echo_client.c
@@ -0,0 +1,3223 @@
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * 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.
+ *
+ * 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).
+ *
+ * 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.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ */
+
+#define DEBUG_SUBSYSTEM S_ECHO
+#include <linux/libcfs/libcfs.h>
+
+#include <obd.h>
+#include <obd_support.h>
+#include <obd_class.h>
+#include <lustre_debug.h>
+#include <lprocfs_status.h>
+#include <cl_object.h>
+#include <lustre_fid.h>
+#include <lustre_acl.h>
+#include <lustre_net.h>
+#include <obd_lov.h>
+
+#include "echo_internal.h"
+
+/** \defgroup echo_client Echo Client
+ * @{
+ */
+
+struct echo_device {
+ struct cl_device ed_cl;
+ struct echo_client_obd *ed_ec;
+
+ struct cl_site ed_site_myself;
+ struct cl_site *ed_site;
+ struct lu_device *ed_next;
+ int ed_next_islov;
+ int ed_next_ismd;
+ struct lu_client_seq *ed_cl_seq;
+};
+
+struct echo_object {
+ struct cl_object eo_cl;
+ struct cl_object_header eo_hdr;
+
+ struct echo_device *eo_dev;
+ struct list_head eo_obj_chain;
+ struct lov_stripe_md *eo_lsm;
+ atomic_t eo_npages;
+ int eo_deleted;
+};
+
+struct echo_object_conf {
+ struct cl_object_conf eoc_cl;
+ struct lov_stripe_md **eoc_md;
+};
+
+struct echo_page {
+ struct cl_page_slice ep_cl;
+ struct mutex ep_lock;
+ struct page *ep_vmpage;
+};
+
+struct echo_lock {
+ struct cl_lock_slice el_cl;
+ struct list_head el_chain;
+ struct echo_object *el_object;
+ __u64 el_cookie;
+ atomic_t el_refcount;
+};
+
+struct echo_io {
+ struct cl_io_slice ei_cl;
+};
+
+#if 0
+struct echo_req {
+ struct cl_req_slice er_cl;
+};
+#endif
+
+static int echo_client_setup(const struct lu_env *env,
+ struct obd_device *obddev,
+ struct lustre_cfg *lcfg);
+static int echo_client_cleanup(struct obd_device *obddev);
+
+
+/** \defgroup echo_helpers Helper functions
+ * @{
+ */
+static inline struct echo_device *cl2echo_dev(const struct cl_device *dev)
+{
+ return container_of0(dev, struct echo_device, ed_cl);
+}
+
+static inline struct cl_device *echo_dev2cl(struct echo_device *d)
+{
+ return &d->ed_cl;
+}
+
+static inline struct echo_device *obd2echo_dev(const struct obd_device *obd)
+{
+ return cl2echo_dev(lu2cl_dev(obd->obd_lu_dev));
+}
+
+static inline struct cl_object *echo_obj2cl(struct echo_object *eco)
+{
+ return &eco->eo_cl;
+}
+
+static inline struct echo_object *cl2echo_obj(const struct cl_object *o)
+{
+ return container_of(o, struct echo_object, eo_cl);
+}
+
+static inline struct echo_page *cl2echo_page(const struct cl_page_slice *s)
+{
+ return container_of(s, struct echo_page, ep_cl);
+}
+
+static inline struct echo_lock *cl2echo_lock(const struct cl_lock_slice *s)
+{
+ return container_of(s, struct echo_lock, el_cl);
+}
+
+static inline struct cl_lock *echo_lock2cl(const struct echo_lock *ecl)
+{
+ return ecl->el_cl.cls_lock;
+}
+
+static struct lu_context_key echo_thread_key;
+static inline struct echo_thread_info *echo_env_info(const struct lu_env *env)
+{
+ struct echo_thread_info *info;
+ info = lu_context_key_get(&env->le_ctx, &echo_thread_key);
+ LASSERT(info != NULL);
+ return info;
+}
+
+static inline
+struct echo_object_conf *cl2echo_conf(const struct cl_object_conf *c)
+{
+ return container_of(c, struct echo_object_conf, eoc_cl);
+}
+
+/** @} echo_helpers */
+
+static struct echo_object *cl_echo_object_find(struct echo_device *d,
+ struct lov_stripe_md **lsm);
+static int cl_echo_object_put(struct echo_object *eco);
+static int cl_echo_enqueue (struct echo_object *eco, obd_off start,
+ obd_off end, int mode, __u64 *cookie);
+static int cl_echo_cancel (struct echo_device *d, __u64 cookie);
+static int cl_echo_object_brw(struct echo_object *eco, int rw, obd_off offset,
+ struct page **pages, int npages, int async);
+
+static struct echo_thread_info *echo_env_info(const struct lu_env *env);
+
+struct echo_thread_info {
+ struct echo_object_conf eti_conf;
+ struct lustre_md eti_md;
+
+ struct cl_2queue eti_queue;
+ struct cl_io eti_io;
+ struct cl_lock_descr eti_descr;
+ struct lu_fid eti_fid;
+ struct lu_fid eti_fid2;
+ struct md_op_spec eti_spec;
+ struct lov_mds_md_v3 eti_lmm;
+ struct lov_user_md_v3 eti_lum;
+ struct md_attr eti_ma;
+ struct lu_name eti_lname;
+ /* per-thread values, can be re-used */
+ void *eti_big_lmm;
+ int eti_big_lmmsize;
+ char eti_name[20];
+ struct lu_buf eti_buf;
+ char eti_xattr_buf[LUSTRE_POSIX_ACL_MAX_SIZE];
+};
+
+/* No session used right now */
+struct echo_session_info {
+ unsigned long dummy;
+};
+
+static struct kmem_cache *echo_lock_kmem;
+static struct kmem_cache *echo_object_kmem;
+static struct kmem_cache *echo_thread_kmem;
+static struct kmem_cache *echo_session_kmem;
+//static struct kmem_cache *echo_req_kmem;
+
+static struct lu_kmem_descr echo_caches[] = {
+ {
+ .ckd_cache = &echo_lock_kmem,
+ .ckd_name = "echo_lock_kmem",
+ .ckd_size = sizeof (struct echo_lock)
+ },
+ {
+ .ckd_cache = &echo_object_kmem,
+ .ckd_name = "echo_object_kmem",
+ .ckd_size = sizeof (struct echo_object)
+ },
+ {
+ .ckd_cache = &echo_thread_kmem,
+ .ckd_name = "echo_thread_kmem",
+ .ckd_size = sizeof (struct echo_thread_info)
+ },
+ {
+ .ckd_cache = &echo_session_kmem,
+ .ckd_name = "echo_session_kmem",
+ .ckd_size = sizeof (struct echo_session_info)
+ },
+#if 0
+ {
+ .ckd_cache = &echo_req_kmem,
+ .ckd_name = "echo_req_kmem",
+ .ckd_size = sizeof (struct echo_req)
+ },
+#endif
+ {
+ .ckd_cache = NULL
+ }
+};
+
+/** \defgroup echo_page Page operations
+ *
+ * Echo page operations.
+ *
+ * @{
+ */
+static struct page *echo_page_vmpage(const struct lu_env *env,
+ const struct cl_page_slice *slice)
+{
+ return cl2echo_page(slice)->ep_vmpage;
+}
+
+static int echo_page_own(const struct lu_env *env,
+ const struct cl_page_slice *slice,
+ struct cl_io *io, int nonblock)
+{
+ struct echo_page *ep = cl2echo_page(slice);
+
+ if (!nonblock)
+ mutex_lock(&ep->ep_lock);
+ else if (!mutex_trylock(&ep->ep_lock))
+ return -EAGAIN;
+ return 0;
+}
+
+static void echo_page_disown(const struct lu_env *env,
+ const struct cl_page_slice *slice,
+ struct cl_io *io)
+{
+ struct echo_page *ep = cl2echo_page(slice);
+
+ LASSERT(mutex_is_locked(&ep->ep_lock));
+ mutex_unlock(&ep->ep_lock);
+}
+
+static void echo_page_discard(const struct lu_env *env,
+ const struct cl_page_slice *slice,
+ struct cl_io *unused)
+{
+ cl_page_delete(env, slice->cpl_page);
+}
+
+static int echo_page_is_vmlocked(const struct lu_env *env,
+ const struct cl_page_slice *slice)
+{
+ if (mutex_is_locked(&cl2echo_page(slice)->ep_lock))
+ return -EBUSY;
+ return -ENODATA;
+}
+
+static void echo_page_completion(const struct lu_env *env,
+ const struct cl_page_slice *slice,
+ int ioret)
+{
+ LASSERT(slice->cpl_page->cp_sync_io != NULL);
+}
+
+static void echo_page_fini(const struct lu_env *env,
+ struct cl_page_slice *slice)
+{
+ struct echo_page *ep = cl2echo_page(slice);
+ struct echo_object *eco = cl2echo_obj(slice->cpl_obj);
+ struct page *vmpage = ep->ep_vmpage;
+ ENTRY;
+
+ atomic_dec(&eco->eo_npages);
+ page_cache_release(vmpage);
+ EXIT;
+}
+
+static int echo_page_prep(const struct lu_env *env,
+ const struct cl_page_slice *slice,
+ struct cl_io *unused)
+{
+ return 0;
+}
+
+static int echo_page_print(const struct lu_env *env,
+ const struct cl_page_slice *slice,
+ void *cookie, lu_printer_t printer)
+{
+ struct echo_page *ep = cl2echo_page(slice);
+
+ (*printer)(env, cookie, LUSTRE_ECHO_CLIENT_NAME"-page@%p %d vm@%p\n",
+ ep, mutex_is_locked(&ep->ep_lock), ep->ep_vmpage);
+ return 0;
+}
+
+static const struct cl_page_operations echo_page_ops = {
+ .cpo_own = echo_page_own,
+ .cpo_disown = echo_page_disown,
+ .cpo_discard = echo_page_discard,
+ .cpo_vmpage = echo_page_vmpage,
+ .cpo_fini = echo_page_fini,
+ .cpo_print = echo_page_print,
+ .cpo_is_vmlocked = echo_page_is_vmlocked,
+ .io = {
+ [CRT_READ] = {
+ .cpo_prep = echo_page_prep,
+ .cpo_completion = echo_page_completion,
+ },
+ [CRT_WRITE] = {
+ .cpo_prep = echo_page_prep,
+ .cpo_completion = echo_page_completion,
+ }
+ }
+};
+/** @} echo_page */
+
+/** \defgroup echo_lock Locking
+ *
+ * echo lock operations
+ *
+ * @{
+ */
+static void echo_lock_fini(const struct lu_env *env,
+ struct cl_lock_slice *slice)
+{
+ struct echo_lock *ecl = cl2echo_lock(slice);
+
+ LASSERT(list_empty(&ecl->el_chain));
+ OBD_SLAB_FREE_PTR(ecl, echo_lock_kmem);
+}
+
+static void echo_lock_delete(const struct lu_env *env,
+ const struct cl_lock_slice *slice)
+{
+ struct echo_lock *ecl = cl2echo_lock(slice);
+
+ LASSERT(list_empty(&ecl->el_chain));
+}
+
+static int echo_lock_fits_into(const struct lu_env *env,
+ const struct cl_lock_slice *slice,
+ const struct cl_lock_descr *need,
+ const struct cl_io *unused)
+{
+ return 1;
+}
+
+static struct cl_lock_operations echo_lock_ops = {
+ .clo_fini = echo_lock_fini,
+ .clo_delete = echo_lock_delete,
+ .clo_fits_into = echo_lock_fits_into
+};
+
+/** @} echo_lock */
+
+/** \defgroup echo_cl_ops cl_object operations
+ *
+ * operations for cl_object
+ *
+ * @{
+ */
+static int echo_page_init(const struct lu_env *env, struct cl_object *obj,
+ struct cl_page *page, struct page *vmpage)
+{
+ struct echo_page *ep = cl_object_page_slice(obj, page);
+ struct echo_object *eco = cl2echo_obj(obj);
+ ENTRY;
+
+ ep->ep_vmpage = vmpage;
+ page_cache_get(vmpage);
+ mutex_init(&ep->ep_lock);
+ cl_page_slice_add(page, &ep->ep_cl, obj, &echo_page_ops);
+ atomic_inc(&eco->eo_npages);
+ RETURN(0);
+}
+
+static int echo_io_init(const struct lu_env *env, struct cl_object *obj,
+ struct cl_io *io)
+{
+ return 0;
+}
+
+static int echo_lock_init(const struct lu_env *env,
+ struct cl_object *obj, struct cl_lock *lock,
+ const struct cl_io *unused)
+{
+ struct echo_lock *el;
+ ENTRY;
+
+ OBD_SLAB_ALLOC_PTR_GFP(el, echo_lock_kmem, __GFP_IO);
+ if (el != NULL) {
+ cl_lock_slice_add(lock, &el->el_cl, obj, &echo_lock_ops);
+ el->el_object = cl2echo_obj(obj);
+ INIT_LIST_HEAD(&el->el_chain);
+ atomic_set(&el->el_refcount, 0);
+ }
+ RETURN(el == NULL ? -ENOMEM : 0);
+}
+
+static int echo_conf_set(const struct lu_env *env, struct cl_object *obj,
+ const struct cl_object_conf *conf)
+{
+ return 0;
+}
+
+static const struct cl_object_operations echo_cl_obj_ops = {
+ .coo_page_init = echo_page_init,
+ .coo_lock_init = echo_lock_init,
+ .coo_io_init = echo_io_init,
+ .coo_conf_set = echo_conf_set
+};
+/** @} echo_cl_ops */
+
+/** \defgroup echo_lu_ops lu_object operations
+ *
+ * operations for echo lu object.
+ *
+ * @{
+ */
+static int echo_object_init(const struct lu_env *env, struct lu_object *obj,
+ const struct lu_object_conf *conf)
+{
+ struct echo_device *ed = cl2echo_dev(lu2cl_dev(obj->lo_dev));
+ struct echo_client_obd *ec = ed->ed_ec;
+ struct echo_object *eco = cl2echo_obj(lu2cl(obj));
+ ENTRY;
+
+ if (ed->ed_next) {
+ struct lu_object *below;
+ struct lu_device *under;
+
+ under = ed->ed_next;
+ below = under->ld_ops->ldo_object_alloc(env, obj->lo_header,
+ under);
+ if (below == NULL)
+ RETURN(-ENOMEM);
+ lu_object_add(obj, below);
+ }
+
+ if (!ed->ed_next_ismd) {
+ const struct cl_object_conf *cconf = lu2cl_conf(conf);
+ struct echo_object_conf *econf = cl2echo_conf(cconf);
+
+ LASSERT(econf->eoc_md);
+ eco->eo_lsm = *econf->eoc_md;
+ /* clear the lsm pointer so that it won't get freed. */
+ *econf->eoc_md = NULL;
+ } else {
+ eco->eo_lsm = NULL;
+ }
+
+ eco->eo_dev = ed;
+ atomic_set(&eco->eo_npages, 0);
+ cl_object_page_init(lu2cl(obj), sizeof(struct echo_page));
+
+ spin_lock(&ec->ec_lock);
+ list_add_tail(&eco->eo_obj_chain, &ec->ec_objects);
+ spin_unlock(&ec->ec_lock);
+
+ RETURN(0);
+}
+
+/* taken from osc_unpackmd() */
+static int echo_alloc_memmd(struct echo_device *ed,
+ struct lov_stripe_md **lsmp)
+{
+ int lsm_size;
+
+ ENTRY;
+
+ /* If export is lov/osc then use their obd method */
+ if (ed->ed_next != NULL)
+ return obd_alloc_memmd(ed->ed_ec->ec_exp, lsmp);
+ /* OFD has no unpackmd method, do everything here */
+ lsm_size = lov_stripe_md_size(1);
+
+ LASSERT(*lsmp == NULL);
+ OBD_ALLOC(*lsmp, lsm_size);
+ if (*lsmp == NULL)
+ RETURN(-ENOMEM);
+
+ OBD_ALLOC((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
+ if ((*lsmp)->lsm_oinfo[0] == NULL) {
+ OBD_FREE(*lsmp, lsm_size);
+ RETURN(-ENOMEM);
+ }
+
+ loi_init((*lsmp)->lsm_oinfo[0]);
+ (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
+ ostid_set_seq_echo(&(*lsmp)->lsm_oi);
+
+ RETURN(lsm_size);
+}
+
+static int echo_free_memmd(struct echo_device *ed, struct lov_stripe_md **lsmp)
+{
+ int lsm_size;
+
+ ENTRY;
+
+ /* If export is lov/osc then use their obd method */
+ if (ed->ed_next != NULL)
+ return obd_free_memmd(ed->ed_ec->ec_exp, lsmp);
+ /* OFD has no unpackmd method, do everything here */
+ lsm_size = lov_stripe_md_size(1);
+
+ LASSERT(*lsmp != NULL);
+ OBD_FREE((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
+ OBD_FREE(*lsmp, lsm_size);
+ *lsmp = NULL;
+ RETURN(0);
+}
+
+static void echo_object_free(const struct lu_env *env, struct lu_object *obj)
+{
+ struct echo_object *eco = cl2echo_obj(lu2cl(obj));
+ struct echo_client_obd *ec = eco->eo_dev->ed_ec;
+ ENTRY;
+
+ LASSERT(atomic_read(&eco->eo_npages) == 0);
+
+ spin_lock(&ec->ec_lock);
+ list_del_init(&eco->eo_obj_chain);
+ spin_unlock(&ec->ec_lock);
+
+ lu_object_fini(obj);
+ lu_object_header_fini(obj->lo_header);
+
+ if (eco->eo_lsm)
+ echo_free_memmd(eco->eo_dev, &eco->eo_lsm);
+ OBD_SLAB_FREE_PTR(eco, echo_object_kmem);
+ EXIT;
+}
+
+static int echo_object_print(const struct lu_env *env, void *cookie,
+ lu_printer_t p, const struct lu_object *o)
+{
+ struct echo_object *obj = cl2echo_obj(lu2cl(o));
+
+ return (*p)(env, cookie, "echoclient-object@%p", obj);
+}
+
+static const struct lu_object_operations echo_lu_obj_ops = {
+ .loo_object_init = echo_object_init,
+ .loo_object_delete = NULL,
+ .loo_object_release = NULL,
+ .loo_object_free = echo_object_free,
+ .loo_object_print = echo_object_print,
+ .loo_object_invariant = NULL
+};
+/** @} echo_lu_ops */
+
+/** \defgroup echo_lu_dev_ops lu_device operations
+ *
+ * Operations for echo lu device.
+ *
+ * @{
+ */
+static struct lu_object *echo_object_alloc(const struct lu_env *env,
+ const struct lu_object_header *hdr,
+ struct lu_device *dev)
+{
+ struct echo_object *eco;
+ struct lu_object *obj = NULL;
+ ENTRY;
+
+ /* we're the top dev. */
+ LASSERT(hdr == NULL);
+ OBD_SLAB_ALLOC_PTR_GFP(eco, echo_object_kmem, __GFP_IO);
+ if (eco != NULL) {
+ struct cl_object_header *hdr = &eco->eo_hdr;
+
+ obj = &echo_obj2cl(eco)->co_lu;
+ cl_object_header_init(hdr);
+ lu_object_init(obj, &hdr->coh_lu, dev);
+ lu_object_add_top(&hdr->coh_lu, obj);
+
+ eco->eo_cl.co_ops = &echo_cl_obj_ops;
+ obj->lo_ops = &echo_lu_obj_ops;
+ }
+ RETURN(obj);
+}
+
+static struct lu_device_operations echo_device_lu_ops = {
+ .ldo_object_alloc = echo_object_alloc,
+};
+
+/** @} echo_lu_dev_ops */
+
+static struct cl_device_operations echo_device_cl_ops = {
+};
+
+/** \defgroup echo_init Setup and teardown
+ *
+ * Init and fini functions for echo client.
+ *
+ * @{
+ */
+static int echo_site_init(const struct lu_env *env, struct echo_device *ed)
+{
+ struct cl_site *site = &ed->ed_site_myself;
+ int rc;
+
+ /* initialize site */
+ rc = cl_site_init(site, &ed->ed_cl);
+ if (rc) {
+ CERROR("Cannot initilize site for echo client(%d)\n", rc);
+ return rc;
+ }
+
+ rc = lu_site_init_finish(&site->cs_lu);
+ if (rc)
+ return rc;
+
+ ed->ed_site = site;
+ return 0;
+}
+
+static void echo_site_fini(const struct lu_env *env, struct echo_device *ed)
+{
+ if (ed->ed_site) {
+ if (!ed->ed_next_ismd)
+ cl_site_fini(ed->ed_site);
+ ed->ed_site = NULL;
+ }
+}
+
+static void *echo_thread_key_init(const struct lu_context *ctx,
+ struct lu_context_key *key)
+{
+ struct echo_thread_info *info;
+
+ OBD_SLAB_ALLOC_PTR_GFP(info, echo_thread_kmem, __GFP_IO);
+ if (info == NULL)
+ info = ERR_PTR(-ENOMEM);
+ return info;
+}
+
+static void echo_thread_key_fini(const struct lu_context *ctx,
+ struct lu_context_key *key, void *data)
+{
+ struct echo_thread_info *info = data;
+ OBD_SLAB_FREE_PTR(info, echo_thread_kmem);
+}
+
+static void echo_thread_key_exit(const struct lu_context *ctx,
+ struct lu_context_key *key, void *data)
+{
+}
+
+static struct lu_context_key echo_thread_key = {
+ .lct_tags = LCT_CL_THREAD,
+ .lct_init = echo_thread_key_init,
+ .lct_fini = echo_thread_key_fini,
+ .lct_exit = echo_thread_key_exit
+};
+
+static void *echo_session_key_init(const struct lu_context *ctx,
+ struct lu_context_key *key)
+{
+ struct echo_session_info *session;
+
+ OBD_SLAB_ALLOC_PTR_GFP(session, echo_session_kmem, __GFP_IO);
+ if (session == NULL)
+ session = ERR_PTR(-ENOMEM);
+ return session;
+}
+
+static void echo_session_key_fini(const struct lu_context *ctx,
+ struct lu_context_key *key, void *data)
+{
+ struct echo_session_info *session = data;
+ OBD_SLAB_FREE_PTR(session, echo_session_kmem);
+}
+
+static void echo_session_key_exit(const struct lu_context *ctx,
+ struct lu_context_key *key, void *data)
+{
+}
+
+static struct lu_context_key echo_session_key = {
+ .lct_tags = LCT_SESSION,
+ .lct_init = echo_session_key_init,
+ .lct_fini = echo_session_key_fini,
+ .lct_exit = echo_session_key_exit
+};
+
+LU_TYPE_INIT_FINI(echo, &echo_thread_key, &echo_session_key);
+
+#define ECHO_SEQ_WIDTH 0xffffffff
+static int echo_fid_init(struct echo_device *ed, char *obd_name,
+ struct seq_server_site *ss)
+{
+ char *prefix;
+ int rc;
+ ENTRY;
+
+ OBD_ALLOC_PTR(ed->ed_cl_seq);
+ if (ed->ed_cl_seq == NULL)
+ RETURN(-ENOMEM);
+
+ OBD_ALLOC(prefix, MAX_OBD_NAME + 5);
+ if (prefix == NULL)
+ GOTO(out_free_seq, rc = -ENOMEM);
+
+ snprintf(prefix, MAX_OBD_NAME + 5, "srv-%s", obd_name);
+
+ /* Init client side sequence-manager */
+ rc = seq_client_init(ed->ed_cl_seq, NULL,
+ LUSTRE_SEQ_METADATA,
+ prefix, ss->ss_server_seq);
+ ed->ed_cl_seq->lcs_width = ECHO_SEQ_WIDTH;
+ OBD_FREE(prefix, MAX_OBD_NAME + 5);
+ if (rc)
+ GOTO(out_free_seq, rc);
+
+ RETURN(0);
+
+out_free_seq:
+ OBD_FREE_PTR(ed->ed_cl_seq);
+ ed->ed_cl_seq = NULL;
+ RETURN(rc);
+}
+
+static int echo_fid_fini(struct obd_device *obddev)
+{
+ struct echo_device *ed = obd2echo_dev(obddev);
+ ENTRY;
+
+ if (ed->ed_cl_seq != NULL) {
+ seq_client_fini(ed->ed_cl_seq);
+ OBD_FREE_PTR(ed->ed_cl_seq);
+ ed->ed_cl_seq = NULL;
+ }
+
+ RETURN(0);
+}
+
+static struct lu_device *echo_device_alloc(const struct lu_env *env,
+ struct lu_device_type *t,
+ struct lustre_cfg *cfg)
+{
+ struct lu_device *next;
+ struct echo_device *ed;
+ struct cl_device *cd;
+ struct obd_device *obd = NULL; /* to keep compiler happy */
+ struct obd_device *tgt;
+ const char *tgt_type_name;
+ int rc;
+ int cleanup = 0;
+ ENTRY;
+
+ OBD_ALLOC_PTR(ed);
+ if (ed == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ cleanup = 1;
+ cd = &ed->ed_cl;
+ rc = cl_device_init(cd, t);
+ if (rc)
+ GOTO(out, rc);
+
+ cd->cd_lu_dev.ld_ops = &echo_device_lu_ops;
+ cd->cd_ops = &echo_device_cl_ops;
+
+ cleanup = 2;
+ obd = class_name2obd(lustre_cfg_string(cfg, 0));
+ LASSERT(obd != NULL);
+ LASSERT(env != NULL);
+
+ tgt = class_name2obd(lustre_cfg_string(cfg, 1));
+ if (tgt == NULL) {
+ CERROR("Can not find tgt device %s\n",
+ lustre_cfg_string(cfg, 1));
+ GOTO(out, rc = -ENODEV);
+ }
+
+ next = tgt->obd_lu_dev;
+ if (!strcmp(tgt->obd_type->typ_name, LUSTRE_MDT_NAME)) {
+ ed->ed_next_ismd = 1;
+ } else {
+ ed->ed_next_ismd = 0;
+ rc = echo_site_init(env, ed);
+ if (rc)
+ GOTO(out, rc);
+ }
+ cleanup = 3;
+
+ rc = echo_client_setup(env, obd, cfg);
+ if (rc)
+ GOTO(out, rc);
+
+ ed->ed_ec = &obd->u.echo_client;
+ cleanup = 4;
+
+ if (ed->ed_next_ismd) {
+ /* Suppose to connect to some Metadata layer */
+ struct lu_site *ls;
+ struct lu_device *ld;
+ int found = 0;
+
+ if (next == NULL) {
+ CERROR("%s is not lu device type!\n",
+ lustre_cfg_string(cfg, 1));
+ GOTO(out, rc = -EINVAL);
+ }
+
+ tgt_type_name = lustre_cfg_string(cfg, 2);
+ if (!tgt_type_name) {
+ CERROR("%s no type name for echo %s setup\n",
+ lustre_cfg_string(cfg, 1),
+ tgt->obd_type->typ_name);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ ls = next->ld_site;
+
+ spin_lock(&ls->ls_ld_lock);
+ list_for_each_entry(ld, &ls->ls_ld_linkage, ld_linkage) {
+ if (strcmp(ld->ld_type->ldt_name, tgt_type_name) == 0) {
+ found = 1;
+ break;
+ }
+ }
+ spin_unlock(&ls->ls_ld_lock);
+
+ if (found == 0) {
+ CERROR("%s is not lu device type!\n",
+ lustre_cfg_string(cfg, 1));
+ GOTO(out, rc = -EINVAL);
+ }
+
+ next = ld;
+ /* For MD echo client, it will use the site in MDS stack */
+ ed->ed_site_myself.cs_lu = *ls;
+ ed->ed_site = &ed->ed_site_myself;
+ ed->ed_cl.cd_lu_dev.ld_site = &ed->ed_site_myself.cs_lu;
+ rc = echo_fid_init(ed, obd->obd_name, lu_site2seq(ls));
+ if (rc) {
+ CERROR("echo fid init error %d\n", rc);
+ GOTO(out, rc);
+ }
+ } else {
+ /* if echo client is to be stacked upon ost device, the next is
+ * NULL since ost is not a clio device so far */
+ if (next != NULL && !lu_device_is_cl(next))
+ next = NULL;
+
+ tgt_type_name = tgt->obd_type->typ_name;
+ if (next != NULL) {
+ LASSERT(next != NULL);
+ if (next->ld_site != NULL)
+ GOTO(out, rc = -EBUSY);
+
+ next->ld_site = &ed->ed_site->cs_lu;
+ rc = next->ld_type->ldt_ops->ldto_device_init(env, next,
+ next->ld_type->ldt_name,
+ NULL);
+ if (rc)
+ GOTO(out, rc);
+
+ /* Tricky case, I have to determine the obd type since
+ * CLIO uses the different parameters to initialize
+ * objects for lov & osc. */
+ if (strcmp(tgt_type_name, LUSTRE_LOV_NAME) == 0)
+ ed->ed_next_islov = 1;
+ else
+ LASSERT(strcmp(tgt_type_name,
+ LUSTRE_OSC_NAME) == 0);
+ } else
+ LASSERT(strcmp(tgt_type_name, LUSTRE_OST_NAME) == 0);
+ }
+
+ ed->ed_next = next;
+ RETURN(&cd->cd_lu_dev);
+out:
+ switch(cleanup) {
+ case 4: {
+ int rc2;
+ rc2 = echo_client_cleanup(obd);
+ if (rc2)
+ CERROR("Cleanup obd device %s error(%d)\n",
+ obd->obd_name, rc2);
+ }
+
+ case 3:
+ echo_site_fini(env, ed);
+ case 2:
+ cl_device_fini(&ed->ed_cl);
+ case 1:
+ OBD_FREE_PTR(ed);
+ case 0:
+ default:
+ break;
+ }
+ return(ERR_PTR(rc));
+}
+
+static int echo_device_init(const struct lu_env *env, struct lu_device *d,
+ const char *name, struct lu_device *next)
+{
+ LBUG();
+ return 0;
+}
+
+static struct lu_device *echo_device_fini(const struct lu_env *env,
+ struct lu_device *d)
+{
+ struct echo_device *ed = cl2echo_dev(lu2cl_dev(d));
+ struct lu_device *next = ed->ed_next;
+
+ while (next && !ed->ed_next_ismd)
+ next = next->ld_type->ldt_ops->ldto_device_fini(env, next);
+ return NULL;
+}
+
+static void echo_lock_release(const struct lu_env *env,
+ struct echo_lock *ecl,
+ int still_used)
+{
+ struct cl_lock *clk = echo_lock2cl(ecl);
+
+ cl_lock_get(clk);
+ cl_unuse(env, clk);
+ cl_lock_release(env, clk, "ec enqueue", ecl->el_object);
+ if (!still_used) {
+ cl_lock_mutex_get(env, clk);
+ cl_lock_cancel(env, clk);
+ cl_lock_delete(env, clk);
+ cl_lock_mutex_put(env, clk);
+ }
+ cl_lock_put(env, clk);
+}
+
+static struct lu_device *echo_device_free(const struct lu_env *env,
+ struct lu_device *d)
+{
+ struct echo_device *ed = cl2echo_dev(lu2cl_dev(d));
+ struct echo_client_obd *ec = ed->ed_ec;
+ struct echo_object *eco;
+ struct lu_device *next = ed->ed_next;
+
+ CDEBUG(D_INFO, "echo device:%p is going to be freed, next = %p\n",
+ ed, next);
+
+ lu_site_purge(env, &ed->ed_site->cs_lu, -1);
+
+ /* check if there are objects still alive.
+ * It shouldn't have any object because lu_site_purge would cleanup
+ * all of cached objects. Anyway, probably the echo device is being
+ * parallelly accessed.
+ */
+ spin_lock(&ec->ec_lock);
+ list_for_each_entry(eco, &ec->ec_objects, eo_obj_chain)
+ eco->eo_deleted = 1;
+ spin_unlock(&ec->ec_lock);
+
+ /* purge again */
+ lu_site_purge(env, &ed->ed_site->cs_lu, -1);
+
+ CDEBUG(D_INFO,
+ "Waiting for the reference of echo object to be dropped\n");
+
+ /* Wait for the last reference to be dropped. */
+ spin_lock(&ec->ec_lock);
+ while (!list_empty(&ec->ec_objects)) {
+ spin_unlock(&ec->ec_lock);
+ CERROR("echo_client still has objects at cleanup time, "
+ "wait for 1 second\n");
+ schedule_timeout_and_set_state(TASK_UNINTERRUPTIBLE,
+ cfs_time_seconds(1));
+ lu_site_purge(env, &ed->ed_site->cs_lu, -1);
+ spin_lock(&ec->ec_lock);
+ }
+ spin_unlock(&ec->ec_lock);
+
+ LASSERT(list_empty(&ec->ec_locks));
+
+ CDEBUG(D_INFO, "No object exists, exiting...\n");
+
+ echo_client_cleanup(d->ld_obd);
+ echo_fid_fini(d->ld_obd);
+ while (next && !ed->ed_next_ismd)
+ next = next->ld_type->ldt_ops->ldto_device_free(env, next);
+
+ LASSERT(ed->ed_site == lu2cl_site(d->ld_site));
+ echo_site_fini(env, ed);
+ cl_device_fini(&ed->ed_cl);
+ OBD_FREE_PTR(ed);
+
+ return NULL;
+}
+
+static const struct lu_device_type_operations echo_device_type_ops = {
+ .ldto_init = echo_type_init,
+ .ldto_fini = echo_type_fini,
+
+ .ldto_start = echo_type_start,
+ .ldto_stop = echo_type_stop,
+
+ .ldto_device_alloc = echo_device_alloc,
+ .ldto_device_free = echo_device_free,
+ .ldto_device_init = echo_device_init,
+ .ldto_device_fini = echo_device_fini
+};
+
+static struct lu_device_type echo_device_type = {
+ .ldt_tags = LU_DEVICE_CL,
+ .ldt_name = LUSTRE_ECHO_CLIENT_NAME,
+ .ldt_ops = &echo_device_type_ops,
+ .ldt_ctx_tags = LCT_CL_THREAD | LCT_MD_THREAD | LCT_DT_THREAD,
+};
+/** @} echo_init */
+
+/** \defgroup echo_exports Exported operations
+ *
+ * exporting functions to echo client
+ *
+ * @{
+ */
+
+/* Interfaces to echo client obd device */
+static struct echo_object *cl_echo_object_find(struct echo_device *d,
+ struct lov_stripe_md **lsmp)
+{
+ struct lu_env *env;
+ struct echo_thread_info *info;
+ struct echo_object_conf *conf;
+ struct lov_stripe_md *lsm;
+ struct echo_object *eco;
+ struct cl_object *obj;
+ struct lu_fid *fid;
+ int refcheck;
+ int rc;
+ ENTRY;
+
+ LASSERT(lsmp);
+ lsm = *lsmp;
+ LASSERT(lsm);
+ LASSERTF(ostid_id(&lsm->lsm_oi) != 0, DOSTID"\n", POSTID(&lsm->lsm_oi));
+ LASSERTF(ostid_seq(&lsm->lsm_oi) == FID_SEQ_ECHO, DOSTID"\n",
+ POSTID(&lsm->lsm_oi));
+
+ /* Never return an object if the obd is to be freed. */
+ if (echo_dev2cl(d)->cd_lu_dev.ld_obd->obd_stopping)
+ RETURN(ERR_PTR(-ENODEV));
+
+ env = cl_env_get(&refcheck);
+ if (IS_ERR(env))
+ RETURN((void *)env);
+
+ info = echo_env_info(env);
+ conf = &info->eti_conf;
+ if (d->ed_next) {
+ if (!d->ed_next_islov) {
+ struct lov_oinfo *oinfo = lsm->lsm_oinfo[0];
+ LASSERT(oinfo != NULL);
+ oinfo->loi_oi = lsm->lsm_oi;
+ conf->eoc_cl.u.coc_oinfo = oinfo;
+ } else {
+ struct lustre_md *md;
+ md = &info->eti_md;
+ memset(md, 0, sizeof *md);
+ md->lsm = lsm;
+ conf->eoc_cl.u.coc_md = md;
+ }
+ }
+ conf->eoc_md = lsmp;
+
+ fid = &info->eti_fid;
+ rc = ostid_to_fid(fid, &lsm->lsm_oi, 0);
+ if (rc != 0)
+ GOTO(out, eco = ERR_PTR(rc));
+
+ /* In the function below, .hs_keycmp resolves to
+ * lu_obj_hop_keycmp() */
+ /* coverity[overrun-buffer-val] */
+ obj = cl_object_find(env, echo_dev2cl(d), fid, &conf->eoc_cl);
+ if (IS_ERR(obj))
+ GOTO(out, eco = (void*)obj);
+
+ eco = cl2echo_obj(obj);
+ if (eco->eo_deleted) {
+ cl_object_put(env, obj);
+ eco = ERR_PTR(-EAGAIN);
+ }
+
+out:
+ cl_env_put(env, &refcheck);
+ RETURN(eco);
+}
+
+static int cl_echo_object_put(struct echo_object *eco)
+{
+ struct lu_env *env;
+ struct cl_object *obj = echo_obj2cl(eco);
+ int refcheck;
+ ENTRY;
+
+ env = cl_env_get(&refcheck);
+ if (IS_ERR(env))
+ RETURN(PTR_ERR(env));
+
+ /* an external function to kill an object? */
+ if (eco->eo_deleted) {
+ struct lu_object_header *loh = obj->co_lu.lo_header;
+ LASSERT(&eco->eo_hdr == luh2coh(loh));
+ set_bit(LU_OBJECT_HEARD_BANSHEE, &loh->loh_flags);
+ }
+
+ cl_object_put(env, obj);
+ cl_env_put(env, &refcheck);
+ RETURN(0);
+}
+
+static int cl_echo_enqueue0(struct lu_env *env, struct echo_object *eco,
+ obd_off start, obd_off end, int mode,
+ __u64 *cookie , __u32 enqflags)
+{
+ struct cl_io *io;
+ struct cl_lock *lck;
+ struct cl_object *obj;
+ struct cl_lock_descr *descr;
+ struct echo_thread_info *info;
+ int rc = -ENOMEM;
+ ENTRY;
+
+ info = echo_env_info(env);
+ io = &info->eti_io;
+ descr = &info->eti_descr;
+ obj = echo_obj2cl(eco);
+
+ descr->cld_obj = obj;
+ descr->cld_start = cl_index(obj, start);
+ descr->cld_end = cl_index(obj, end);
+ descr->cld_mode = mode == LCK_PW ? CLM_WRITE : CLM_READ;
+ descr->cld_enq_flags = enqflags;
+ io->ci_obj = obj;
+
+ lck = cl_lock_request(env, io, descr, "ec enqueue", eco);
+ if (lck) {
+ struct echo_client_obd *ec = eco->eo_dev->ed_ec;
+ struct echo_lock *el;
+
+ rc = cl_wait(env, lck);
+ if (rc == 0) {
+ el = cl2echo_lock(cl_lock_at(lck, &echo_device_type));
+ spin_lock(&ec->ec_lock);
+ if (list_empty(&el->el_chain)) {
+ list_add(&el->el_chain, &ec->ec_locks);
+ el->el_cookie = ++ec->ec_unique;
+ }
+ atomic_inc(&el->el_refcount);
+ *cookie = el->el_cookie;
+ spin_unlock(&ec->ec_lock);
+ } else {
+ cl_lock_release(env, lck, "ec enqueue", current);
+ }
+ }
+ RETURN(rc);
+}
+
+static int cl_echo_enqueue(struct echo_object *eco, obd_off start, obd_off end,
+ int mode, __u64 *cookie)
+{
+ struct echo_thread_info *info;
+ struct lu_env *env;
+ struct cl_io *io;
+ int refcheck;
+ int result;
+ ENTRY;
+
+ env = cl_env_get(&refcheck);
+ if (IS_ERR(env))
+ RETURN(PTR_ERR(env));
+
+ info = echo_env_info(env);
+ io = &info->eti_io;
+
+ io->ci_ignore_layout = 1;
+ result = cl_io_init(env, io, CIT_MISC, echo_obj2cl(eco));
+ if (result < 0)
+ GOTO(out, result);
+ LASSERT(result == 0);
+
+ result = cl_echo_enqueue0(env, eco, start, end, mode, cookie, 0);
+ cl_io_fini(env, io);
+
+ EXIT;
+out:
+ cl_env_put(env, &refcheck);
+ return result;
+}
+
+static int cl_echo_cancel0(struct lu_env *env, struct echo_device *ed,
+ __u64 cookie)
+{
+ struct echo_client_obd *ec = ed->ed_ec;
+ struct echo_lock *ecl = NULL;
+ struct list_head *el;
+ int found = 0, still_used = 0;
+ ENTRY;
+
+ LASSERT(ec != NULL);
+ spin_lock(&ec->ec_lock);
+ list_for_each (el, &ec->ec_locks) {
+ ecl = list_entry (el, struct echo_lock, el_chain);
+ CDEBUG(D_INFO, "ecl: %p, cookie: "LPX64"\n", ecl, ecl->el_cookie);
+ found = (ecl->el_cookie == cookie);
+ if (found) {
+ if (atomic_dec_and_test(&ecl->el_refcount))
+ list_del_init(&ecl->el_chain);
+ else
+ still_used = 1;
+ break;
+ }
+ }
+ spin_unlock(&ec->ec_lock);
+
+ if (!found)
+ RETURN(-ENOENT);
+
+ echo_lock_release(env, ecl, still_used);
+ RETURN(0);
+}
+
+static int cl_echo_cancel(struct echo_device *ed, __u64 cookie)
+{
+ struct lu_env *env;
+ int refcheck;
+ int rc;
+ ENTRY;
+
+ env = cl_env_get(&refcheck);
+ if (IS_ERR(env))
+ RETURN(PTR_ERR(env));
+
+ rc = cl_echo_cancel0(env, ed, cookie);
+
+ cl_env_put(env, &refcheck);
+ RETURN(rc);
+}
+
+static int cl_echo_async_brw(const struct lu_env *env, struct cl_io *io,
+ enum cl_req_type unused, struct cl_2queue *queue)
+{
+ struct cl_page *clp;
+ struct cl_page *temp;
+ int result = 0;
+ ENTRY;
+
+ cl_page_list_for_each_safe(clp, temp, &queue->c2_qin) {
+ int rc;
+ rc = cl_page_cache_add(env, io, clp, CRT_WRITE);
+ if (rc == 0)
+ continue;
+ result = result ?: rc;
+ }
+ RETURN(result);
+}
+
+static int cl_echo_object_brw(struct echo_object *eco, int rw, obd_off offset,
+ struct page **pages, int npages, int async)
+{
+ struct lu_env *env;
+ struct echo_thread_info *info;
+ struct cl_object *obj = echo_obj2cl(eco);
+ struct echo_device *ed = eco->eo_dev;
+ struct cl_2queue *queue;
+ struct cl_io *io;
+ struct cl_page *clp;
+ struct lustre_handle lh = { 0 };
+ int page_size = cl_page_size(obj);
+ int refcheck;
+ int rc;
+ int i;
+ ENTRY;
+
+ LASSERT((offset & ~CFS_PAGE_MASK) == 0);
+ LASSERT(ed->ed_next != NULL);
+ env = cl_env_get(&refcheck);
+ if (IS_ERR(env))
+ RETURN(PTR_ERR(env));
+
+ info = echo_env_info(env);
+ io = &info->eti_io;
+ queue = &info->eti_queue;
+
+ cl_2queue_init(queue);
+
+ io->ci_ignore_layout = 1;
+ rc = cl_io_init(env, io, CIT_MISC, obj);
+ if (rc < 0)
+ GOTO(out, rc);
+ LASSERT(rc == 0);
+
+
+ rc = cl_echo_enqueue0(env, eco, offset,
+ offset + npages * PAGE_CACHE_SIZE - 1,
+ rw == READ ? LCK_PR : LCK_PW, &lh.cookie,
+ CEF_NEVER);
+ if (rc < 0)
+ GOTO(error_lock, rc);
+
+ for (i = 0; i < npages; i++) {
+ LASSERT(pages[i]);
+ clp = cl_page_find(env, obj, cl_index(obj, offset),
+ pages[i], CPT_TRANSIENT);
+ if (IS_ERR(clp)) {
+ rc = PTR_ERR(clp);
+ break;
+ }
+ LASSERT(clp->cp_type == CPT_TRANSIENT);
+
+ rc = cl_page_own(env, io, clp);
+ if (rc) {
+ LASSERT(clp->cp_state == CPS_FREEING);
+ cl_page_put(env, clp);
+ break;
+ }
+
+ cl_2queue_add(queue, clp);
+
+ /* drop the reference count for cl_page_find, so that the page
+ * will be freed in cl_2queue_fini. */
+ cl_page_put(env, clp);
+ cl_page_clip(env, clp, 0, page_size);
+
+ offset += page_size;
+ }
+
+ if (rc == 0) {
+ enum cl_req_type typ = rw == READ ? CRT_READ : CRT_WRITE;
+
+ async = async && (typ == CRT_WRITE);
+ if (async)
+ rc = cl_echo_async_brw(env, io, typ, queue);
+ else
+ rc = cl_io_submit_sync(env, io, typ, queue, 0);
+ CDEBUG(D_INFO, "echo_client %s write returns %d\n",
+ async ? "async" : "sync", rc);
+ }
+
+ cl_echo_cancel0(env, ed, lh.cookie);
+ EXIT;
+error_lock:
+ cl_2queue_discard(env, io, queue);
+ cl_2queue_disown(env, io, queue);
+ cl_2queue_fini(env, queue);
+ cl_io_fini(env, io);
+out:
+ cl_env_put(env, &refcheck);
+ return rc;
+}
+/** @} echo_exports */
+
+
+static obd_id last_object_id;
+
+static int
+echo_copyout_lsm (struct lov_stripe_md *lsm, void *_ulsm, int ulsm_nob)
+{
+ struct lov_stripe_md *ulsm = _ulsm;
+ int nob, i;
+
+ nob = offsetof (struct lov_stripe_md, lsm_oinfo[lsm->lsm_stripe_count]);
+ if (nob > ulsm_nob)
+ return (-EINVAL);
+
+ if (copy_to_user (ulsm, lsm, sizeof(ulsm)))
+ return (-EFAULT);
+
+ for (i = 0; i < lsm->lsm_stripe_count; i++) {
+ if (copy_to_user (ulsm->lsm_oinfo[i], lsm->lsm_oinfo[i],
+ sizeof(lsm->lsm_oinfo[0])))
+ return (-EFAULT);
+ }
+ return 0;
+}
+
+static int
+echo_copyin_lsm (struct echo_device *ed, struct lov_stripe_md *lsm,
+ void *ulsm, int ulsm_nob)
+{
+ struct echo_client_obd *ec = ed->ed_ec;
+ int i;
+
+ if (ulsm_nob < sizeof (*lsm))
+ return (-EINVAL);
+
+ if (copy_from_user (lsm, ulsm, sizeof (*lsm)))
+ return (-EFAULT);
+
+ if (lsm->lsm_stripe_count > ec->ec_nstripes ||
+ lsm->lsm_magic != LOV_MAGIC ||
+ (lsm->lsm_stripe_size & (~CFS_PAGE_MASK)) != 0 ||
+ ((__u64)lsm->lsm_stripe_size * lsm->lsm_stripe_count > ~0UL))
+ return (-EINVAL);
+
+
+ for (i = 0; i < lsm->lsm_stripe_count; i++) {
+ if (copy_from_user(lsm->lsm_oinfo[i],
+ ((struct lov_stripe_md *)ulsm)-> \
+ lsm_oinfo[i],
+ sizeof(lsm->lsm_oinfo[0])))
+ return (-EFAULT);
+ }
+ return (0);
+}
+
+static inline void echo_md_build_name(struct lu_name *lname, char *name,
+ __u64 id)
+{
+ sprintf(name, LPU64, id);
+ lname->ln_name = name;
+ lname->ln_namelen = strlen(name);
+}
+
+/* similar to mdt_attr_get_complex */
+static int echo_big_lmm_get(const struct lu_env *env, struct md_object *o,
+ struct md_attr *ma)
+{
+ struct echo_thread_info *info = echo_env_info(env);
+ int rc;
+
+ ENTRY;
+
+ LASSERT(ma->ma_lmm_size > 0);
+
+ rc = mo_xattr_get(env, o, &LU_BUF_NULL, XATTR_NAME_LOV);
+ if (rc < 0)
+ RETURN(rc);
+
+ /* big_lmm may need to be grown */
+ if (info->eti_big_lmmsize < rc) {
+ int size = size_roundup_power2(rc);
+
+ if (info->eti_big_lmmsize > 0) {
+ /* free old buffer */
+ LASSERT(info->eti_big_lmm);
+ OBD_FREE_LARGE(info->eti_big_lmm,
+ info->eti_big_lmmsize);
+ info->eti_big_lmm = NULL;
+ info->eti_big_lmmsize = 0;
+ }
+
+ OBD_ALLOC_LARGE(info->eti_big_lmm, size);
+ if (info->eti_big_lmm == NULL)
+ RETURN(-ENOMEM);
+ info->eti_big_lmmsize = size;
+ }
+ LASSERT(info->eti_big_lmmsize >= rc);
+
+ info->eti_buf.lb_buf = info->eti_big_lmm;
+ info->eti_buf.lb_len = info->eti_big_lmmsize;
+ rc = mo_xattr_get(env, o, &info->eti_buf, XATTR_NAME_LOV);
+ if (rc < 0)
+ RETURN(rc);
+
+ ma->ma_valid |= MA_LOV;
+ ma->ma_lmm = info->eti_big_lmm;
+ ma->ma_lmm_size = rc;
+
+ RETURN(0);
+}
+
+int echo_attr_get_complex(const struct lu_env *env, struct md_object *next,
+ struct md_attr *ma)
+{
+ struct echo_thread_info *info = echo_env_info(env);
+ struct lu_buf *buf = &info->eti_buf;
+ umode_t mode = lu_object_attr(&next->mo_lu);
+ int need = ma->ma_need;
+ int rc = 0, rc2;
+
+ ENTRY;
+
+ ma->ma_valid = 0;
+
+ if (need & MA_INODE) {
+ ma->ma_need = MA_INODE;
+ rc = mo_attr_get(env, next, ma);
+ if (rc)
+ GOTO(out, rc);
+ ma->ma_valid |= MA_INODE;
+ }
+
+ if (need & MA_LOV) {
+ if (S_ISREG(mode) || S_ISDIR(mode)) {
+ LASSERT(ma->ma_lmm_size > 0);
+ buf->lb_buf = ma->ma_lmm;
+ buf->lb_len = ma->ma_lmm_size;
+ rc2 = mo_xattr_get(env, next, buf, XATTR_NAME_LOV);
+ if (rc2 > 0) {
+ ma->ma_lmm_size = rc2;
+ ma->ma_valid |= MA_LOV;
+ } else if (rc2 == -ENODATA) {
+ /* no LOV EA */
+ ma->ma_lmm_size = 0;
+ } else if (rc2 == -ERANGE) {
+ rc2 = echo_big_lmm_get(env, next, ma);
+ if (rc2 < 0)
+ GOTO(out, rc = rc2);
+ } else {
+ GOTO(out, rc = rc2);
+ }
+ }
+ }
+
+#ifdef CONFIG_FS_POSIX_ACL
+ if (need & MA_ACL_DEF && S_ISDIR(mode)) {
+ buf->lb_buf = ma->ma_acl;
+ buf->lb_len = ma->ma_acl_size;
+ rc2 = mo_xattr_get(env, next, buf, XATTR_NAME_ACL_DEFAULT);
+ if (rc2 > 0) {
+ ma->ma_acl_size = rc2;
+ ma->ma_valid |= MA_ACL_DEF;
+ } else if (rc2 == -ENODATA) {
+ /* no ACLs */
+ ma->ma_acl_size = 0;
+ } else {
+ GOTO(out, rc = rc2);
+ }
+ }
+#endif
+out:
+ ma->ma_need = need;
+ CDEBUG(D_INODE, "after getattr rc = %d, ma_valid = "LPX64" ma_lmm=%p\n",
+ rc, ma->ma_valid, ma->ma_lmm);
+ RETURN(rc);
+}
+
+static int
+echo_md_create_internal(const struct lu_env *env, struct echo_device *ed,
+ struct md_object *parent, struct lu_fid *fid,
+ struct lu_name *lname, struct md_op_spec *spec,
+ struct md_attr *ma)
+{
+ struct lu_object *ec_child, *child;
+ struct lu_device *ld = ed->ed_next;
+ struct echo_thread_info *info = echo_env_info(env);
+ struct lu_fid *fid2 = &info->eti_fid2;
+ struct lu_object_conf conf = { .loc_flags = LOC_F_NEW };
+ int rc;
+
+ ENTRY;
+
+ rc = mdo_lookup(env, parent, lname, fid2, spec);
+ if (rc == 0)
+ return -EEXIST;
+ else if (rc != -ENOENT)
+ return rc;
+
+ ec_child = lu_object_find_at(env, &ed->ed_cl.cd_lu_dev,
+ fid, &conf);
+ if (IS_ERR(ec_child)) {
+ CERROR("Can not find the child "DFID": rc = %ld\n", PFID(fid),
+ PTR_ERR(ec_child));
+ RETURN(PTR_ERR(ec_child));
+ }
+
+ child = lu_object_locate(ec_child->lo_header, ld->ld_type);
+ if (child == NULL) {
+ CERROR("Can not locate the child "DFID"\n", PFID(fid));
+ GOTO(out_put, rc = -EINVAL);
+ }
+
+ CDEBUG(D_RPCTRACE, "Start creating object "DFID" %s %p\n",
+ PFID(lu_object_fid(&parent->mo_lu)), lname->ln_name, parent);
+
+ /*
+ * Do not perform lookup sanity check. We know that name does not exist.
+ */
+ spec->sp_cr_lookup = 0;
+ rc = mdo_create(env, parent, lname, lu2md(child), spec, ma);
+ if (rc) {
+ CERROR("Can not create child "DFID": rc = %d\n", PFID(fid), rc);
+ GOTO(out_put, rc);
+ }
+ CDEBUG(D_RPCTRACE, "End creating object "DFID" %s %p rc = %d\n",
+ PFID(lu_object_fid(&parent->mo_lu)), lname->ln_name, parent, rc);
+ EXIT;
+out_put:
+ lu_object_put(env, ec_child);
+ return rc;
+}
+
+static int echo_set_lmm_size(const struct lu_env *env, struct lu_device *ld,
+ struct md_attr *ma)
+{
+ struct echo_thread_info *info = echo_env_info(env);
+
+ if (strcmp(ld->ld_type->ldt_name, LUSTRE_MDD_NAME)) {
+ ma->ma_lmm = (void *)&info->eti_lmm;
+ ma->ma_lmm_size = sizeof(info->eti_lmm);
+ } else {
+ LASSERT(info->eti_big_lmmsize);
+ ma->ma_lmm = info->eti_big_lmm;
+ ma->ma_lmm_size = info->eti_big_lmmsize;
+ }
+
+ return 0;
+}
+
+static int echo_create_md_object(const struct lu_env *env,
+ struct echo_device *ed,
+ struct lu_object *ec_parent,
+ struct lu_fid *fid,
+ char *name, int namelen,
+ __u64 id, __u32 mode, int count,
+ int stripe_count, int stripe_offset)
+{
+ struct lu_object *parent;
+ struct echo_thread_info *info = echo_env_info(env);
+ struct lu_name *lname = &info->eti_lname;
+ struct md_op_spec *spec = &info->eti_spec;
+ struct md_attr *ma = &info->eti_ma;
+ struct lu_device *ld = ed->ed_next;
+ int rc = 0;
+ int i;
+
+ ENTRY;
+
+ if (ec_parent == NULL)
+ return -1;
+ parent = lu_object_locate(ec_parent->lo_header, ld->ld_type);
+ if (parent == NULL)
+ RETURN(-ENXIO);
+
+ memset(ma, 0, sizeof(*ma));
+ memset(spec, 0, sizeof(*spec));
+ if (stripe_count != 0) {
+ spec->sp_cr_flags |= FMODE_WRITE;
+ echo_set_lmm_size(env, ld, ma);
+ if (stripe_count != -1) {
+ struct lov_user_md_v3 *lum = &info->eti_lum;
+
+ lum->lmm_magic = LOV_USER_MAGIC_V3;
+ lum->lmm_stripe_count = stripe_count;
+ lum->lmm_stripe_offset = stripe_offset;
+ lum->lmm_pattern = 0;
+ spec->u.sp_ea.eadata = lum;
+ spec->u.sp_ea.eadatalen = sizeof(*lum);
+ spec->sp_cr_flags |= MDS_OPEN_HAS_EA;
+ }
+ }
+
+ ma->ma_attr.la_mode = mode;
+ ma->ma_attr.la_valid = LA_CTIME | LA_MODE;
+ ma->ma_attr.la_ctime = cfs_time_current_64();
+
+ if (name != NULL) {
+ lname->ln_name = name;
+ lname->ln_namelen = namelen;
+ /* If name is specified, only create one object by name */
+ rc = echo_md_create_internal(env, ed, lu2md(parent), fid, lname,
+ spec, ma);
+ RETURN(rc);
+ }
+
+ /* Create multiple object sequenced by id */
+ for (i = 0; i < count; i++) {
+ char *tmp_name = info->eti_name;
+
+ echo_md_build_name(lname, tmp_name, id);
+
+ rc = echo_md_create_internal(env, ed, lu2md(parent), fid, lname,
+ spec, ma);
+ if (rc) {
+ CERROR("Can not create child %s: rc = %d\n", tmp_name,
+ rc);
+ break;
+ }
+ id++;
+ fid->f_oid++;
+ }
+
+ RETURN(rc);
+}
+
+static struct lu_object *echo_md_lookup(const struct lu_env *env,
+ struct echo_device *ed,
+ struct md_object *parent,
+ struct lu_name *lname)
+{
+ struct echo_thread_info *info = echo_env_info(env);
+ struct lu_fid *fid = &info->eti_fid;
+ struct lu_object *child;
+ int rc;
+ ENTRY;
+
+ CDEBUG(D_INFO, "lookup %s in parent "DFID" %p\n", lname->ln_name,
+ PFID(fid), parent);
+ rc = mdo_lookup(env, parent, lname, fid, NULL);
+ if (rc) {
+ CERROR("lookup %s: rc = %d\n", lname->ln_name, rc);
+ RETURN(ERR_PTR(rc));
+ }
+
+ /* In the function below, .hs_keycmp resolves to
+ * lu_obj_hop_keycmp() */
+ /* coverity[overrun-buffer-val] */
+ child = lu_object_find_at(env, &ed->ed_cl.cd_lu_dev, fid, NULL);
+
+ RETURN(child);
+}
+
+static int echo_setattr_object(const struct lu_env *env,
+ struct echo_device *ed,
+ struct lu_object *ec_parent,
+ __u64 id, int count)
+{
+ struct lu_object *parent;
+ struct echo_thread_info *info = echo_env_info(env);
+ struct lu_name *lname = &info->eti_lname;
+ char *name = info->eti_name;
+ struct lu_device *ld = ed->ed_next;
+ struct lu_buf *buf = &info->eti_buf;
+ int rc = 0;
+ int i;
+
+ ENTRY;
+
+ if (ec_parent == NULL)
+ return -1;
+ parent = lu_object_locate(ec_parent->lo_header, ld->ld_type);
+ if (parent == NULL)
+ RETURN(-ENXIO);
+
+ for (i = 0; i < count; i++) {
+ struct lu_object *ec_child, *child;
+
+ echo_md_build_name(lname, name, id);
+
+ ec_child = echo_md_lookup(env, ed, lu2md(parent), lname);
+ if (IS_ERR(ec_child)) {
+ CERROR("Can't find child %s: rc = %ld\n",
+ lname->ln_name, PTR_ERR(ec_child));
+ RETURN(PTR_ERR(ec_child));
+ }
+
+ child = lu_object_locate(ec_child->lo_header, ld->ld_type);
+ if (child == NULL) {
+ CERROR("Can not locate the child %s\n", lname->ln_name);
+ lu_object_put(env, ec_child);
+ rc = -EINVAL;
+ break;
+ }
+
+ CDEBUG(D_RPCTRACE, "Start setattr object "DFID"\n",
+ PFID(lu_object_fid(child)));
+
+ buf->lb_buf = info->eti_xattr_buf;
+ buf->lb_len = sizeof(info->eti_xattr_buf);
+
+ sprintf(name, "%s.test1", XATTR_USER_PREFIX);
+ rc = mo_xattr_set(env, lu2md(child), buf, name,
+ LU_XATTR_CREATE);
+ if (rc < 0) {
+ CERROR("Can not setattr child "DFID": rc = %d\n",
+ PFID(lu_object_fid(child)), rc);
+ lu_object_put(env, ec_child);
+ break;
+ }
+ CDEBUG(D_RPCTRACE, "End setattr object "DFID"\n",
+ PFID(lu_object_fid(child)));
+ id++;
+ lu_object_put(env, ec_child);
+ }
+ RETURN(rc);
+}
+
+static int echo_getattr_object(const struct lu_env *env,
+ struct echo_device *ed,
+ struct lu_object *ec_parent,
+ __u64 id, int count)
+{
+ struct lu_object *parent;
+ struct echo_thread_info *info = echo_env_info(env);
+ struct lu_name *lname = &info->eti_lname;
+ char *name = info->eti_name;
+ struct md_attr *ma = &info->eti_ma;
+ struct lu_device *ld = ed->ed_next;
+ int rc = 0;
+ int i;
+
+ ENTRY;
+
+ if (ec_parent == NULL)
+ return -1;
+ parent = lu_object_locate(ec_parent->lo_header, ld->ld_type);
+ if (parent == NULL)
+ RETURN(-ENXIO);
+
+ memset(ma, 0, sizeof(*ma));
+ ma->ma_need |= MA_INODE | MA_LOV | MA_PFID | MA_HSM | MA_ACL_DEF;
+ ma->ma_acl = info->eti_xattr_buf;
+ ma->ma_acl_size = sizeof(info->eti_xattr_buf);
+
+ for (i = 0; i < count; i++) {
+ struct lu_object *ec_child, *child;
+
+ ma->ma_valid = 0;
+ echo_md_build_name(lname, name, id);
+ echo_set_lmm_size(env, ld, ma);
+
+ ec_child = echo_md_lookup(env, ed, lu2md(parent), lname);
+ if (IS_ERR(ec_child)) {
+ CERROR("Can't find child %s: rc = %ld\n",
+ lname->ln_name, PTR_ERR(ec_child));
+ RETURN(PTR_ERR(ec_child));
+ }
+
+ child = lu_object_locate(ec_child->lo_header, ld->ld_type);
+ if (child == NULL) {
+ CERROR("Can not locate the child %s\n", lname->ln_name);
+ lu_object_put(env, ec_child);
+ RETURN(-EINVAL);
+ }
+
+ CDEBUG(D_RPCTRACE, "Start getattr object "DFID"\n",
+ PFID(lu_object_fid(child)));
+ rc = echo_attr_get_complex(env, lu2md(child), ma);
+ if (rc) {
+ CERROR("Can not getattr child "DFID": rc = %d\n",
+ PFID(lu_object_fid(child)), rc);
+ lu_object_put(env, ec_child);
+ break;
+ }
+ CDEBUG(D_RPCTRACE, "End getattr object "DFID"\n",
+ PFID(lu_object_fid(child)));
+ id++;
+ lu_object_put(env, ec_child);
+ }
+
+ RETURN(rc);
+}
+
+static int echo_lookup_object(const struct lu_env *env,
+ struct echo_device *ed,
+ struct lu_object *ec_parent,
+ __u64 id, int count)
+{
+ struct lu_object *parent;
+ struct echo_thread_info *info = echo_env_info(env);
+ struct lu_name *lname = &info->eti_lname;
+ char *name = info->eti_name;
+ struct lu_fid *fid = &info->eti_fid;
+ struct lu_device *ld = ed->ed_next;
+ int rc = 0;
+ int i;
+
+ if (ec_parent == NULL)
+ return -1;
+ parent = lu_object_locate(ec_parent->lo_header, ld->ld_type);
+ if (parent == NULL)
+ return -ENXIO;
+
+ /*prepare the requests*/
+ for (i = 0; i < count; i++) {
+ echo_md_build_name(lname, name, id);
+
+ CDEBUG(D_RPCTRACE, "Start lookup object "DFID" %s %p\n",
+ PFID(lu_object_fid(parent)), lname->ln_name, parent);
+
+ rc = mdo_lookup(env, lu2md(parent), lname, fid, NULL);
+ if (rc) {
+ CERROR("Can not lookup child %s: rc = %d\n", name, rc);
+ break;
+ }
+ CDEBUG(D_RPCTRACE, "End lookup object "DFID" %s %p\n",
+ PFID(lu_object_fid(parent)), lname->ln_name, parent);
+
+ id++;
+ }
+ return rc;
+}
+
+static int echo_md_destroy_internal(const struct lu_env *env,
+ struct echo_device *ed,
+ struct md_object *parent,
+ struct lu_name *lname,
+ struct md_attr *ma)
+{
+ struct lu_device *ld = ed->ed_next;
+ struct lu_object *ec_child;
+ struct lu_object *child;
+ int rc;
+
+ ENTRY;
+
+ ec_child = echo_md_lookup(env, ed, parent, lname);
+ if (IS_ERR(ec_child)) {
+ CERROR("Can't find child %s: rc = %ld\n", lname->ln_name,
+ PTR_ERR(ec_child));
+ RETURN(PTR_ERR(ec_child));
+ }
+
+ child = lu_object_locate(ec_child->lo_header, ld->ld_type);
+ if (child == NULL) {
+ CERROR("Can not locate the child %s\n", lname->ln_name);
+ GOTO(out_put, rc = -EINVAL);
+ }
+
+ CDEBUG(D_RPCTRACE, "Start destroy object "DFID" %s %p\n",
+ PFID(lu_object_fid(&parent->mo_lu)), lname->ln_name, parent);
+
+ rc = mdo_unlink(env, parent, lu2md(child), lname, ma, 0);
+ if (rc) {
+ CERROR("Can not unlink child %s: rc = %d\n",
+ lname->ln_name, rc);
+ GOTO(out_put, rc);
+ }
+ CDEBUG(D_RPCTRACE, "End destroy object "DFID" %s %p\n",
+ PFID(lu_object_fid(&parent->mo_lu)), lname->ln_name, parent);
+out_put:
+ lu_object_put(env, ec_child);
+ return rc;
+}
+
+static int echo_destroy_object(const struct lu_env *env,
+ struct echo_device *ed,
+ struct lu_object *ec_parent,
+ char *name, int namelen,
+ __u64 id, __u32 mode,
+ int count)
+{
+ struct echo_thread_info *info = echo_env_info(env);
+ struct lu_name *lname = &info->eti_lname;
+ struct md_attr *ma = &info->eti_ma;
+ struct lu_device *ld = ed->ed_next;
+ struct lu_object *parent;
+ int rc = 0;
+ int i;
+ ENTRY;
+
+ parent = lu_object_locate(ec_parent->lo_header, ld->ld_type);
+ if (parent == NULL)
+ RETURN(-EINVAL);
+
+ memset(ma, 0, sizeof(*ma));
+ ma->ma_attr.la_mode = mode;
+ ma->ma_attr.la_valid = LA_CTIME;
+ ma->ma_attr.la_ctime = cfs_time_current_64();
+ ma->ma_need = MA_INODE;
+ ma->ma_valid = 0;
+
+ if (name != NULL) {
+ lname->ln_name = name;
+ lname->ln_namelen = namelen;
+ rc = echo_md_destroy_internal(env, ed, lu2md(parent), lname,
+ ma);
+ RETURN(rc);
+ }
+
+ /*prepare the requests*/
+ for (i = 0; i < count; i++) {
+ char *tmp_name = info->eti_name;
+
+ ma->ma_valid = 0;
+ echo_md_build_name(lname, tmp_name, id);
+
+ rc = echo_md_destroy_internal(env, ed, lu2md(parent), lname,
+ ma);
+ if (rc) {
+ CERROR("Can not unlink child %s: rc = %d\n", name, rc);
+ break;
+ }
+ id++;
+ }
+
+ RETURN(rc);
+}
+
+static struct lu_object *echo_resolve_path(const struct lu_env *env,
+ struct echo_device *ed, char *path,
+ int path_len)
+{
+ struct lu_device *ld = ed->ed_next;
+ struct md_device *md = lu2md_dev(ld);
+ struct echo_thread_info *info = echo_env_info(env);
+ struct lu_fid *fid = &info->eti_fid;
+ struct lu_name *lname = &info->eti_lname;
+ struct lu_object *parent = NULL;
+ struct lu_object *child = NULL;
+ int rc = 0;
+ ENTRY;
+
+ /*Only support MDD layer right now*/
+ rc = md->md_ops->mdo_root_get(env, md, fid);
+ if (rc) {
+ CERROR("get root error: rc = %d\n", rc);
+ RETURN(ERR_PTR(rc));
+ }
+
+ /* In the function below, .hs_keycmp resolves to
+ * lu_obj_hop_keycmp() */
+ /* coverity[overrun-buffer-val] */
+ parent = lu_object_find_at(env, &ed->ed_cl.cd_lu_dev, fid, NULL);
+ if (IS_ERR(parent)) {
+ CERROR("Can not find the parent "DFID": rc = %ld\n",
+ PFID(fid), PTR_ERR(parent));
+ RETURN(parent);
+ }
+
+ while (1) {
+ struct lu_object *ld_parent;
+ char *e;
+
+ e = strsep(&path, "/");
+ if (e == NULL)
+ break;
+
+ if (e[0] == 0) {
+ if (!path || path[0] == '\0')
+ break;
+ continue;
+ }
+
+ lname->ln_name = e;
+ lname->ln_namelen = strlen(e);
+
+ ld_parent = lu_object_locate(parent->lo_header, ld->ld_type);
+ if (ld_parent == NULL) {
+ lu_object_put(env, parent);
+ rc = -EINVAL;
+ break;
+ }
+
+ child = echo_md_lookup(env, ed, lu2md(ld_parent), lname);
+ lu_object_put(env, parent);
+ if (IS_ERR(child)) {
+ rc = (int)PTR_ERR(child);
+ CERROR("lookup %s under parent "DFID": rc = %d\n",
+ lname->ln_name, PFID(lu_object_fid(ld_parent)),
+ rc);
+ break;
+ }
+ parent = child;
+ }
+ if (rc)
+ RETURN(ERR_PTR(rc));
+
+ RETURN(parent);
+}
+
+static void echo_ucred_init(struct lu_env *env)
+{
+ struct lu_ucred *ucred = lu_ucred(env);
+
+ ucred->uc_valid = UCRED_INVALID;
+
+ ucred->uc_suppgids[0] = -1;
+ ucred->uc_suppgids[1] = -1;
+
+ ucred->uc_uid = ucred->uc_o_uid = current_uid();
+ ucred->uc_gid = ucred->uc_o_gid = current_gid();
+ ucred->uc_fsuid = ucred->uc_o_fsuid = current_fsuid();
+ ucred->uc_fsgid = ucred->uc_o_fsgid = current_fsgid();
+ ucred->uc_cap = cfs_curproc_cap_pack();
+
+ /* remove fs privilege for non-root user. */
+ if (ucred->uc_fsuid)
+ ucred->uc_cap &= ~CFS_CAP_FS_MASK;
+ ucred->uc_valid = UCRED_NEW;
+}
+
+static void echo_ucred_fini(struct lu_env *env)
+{
+ struct lu_ucred *ucred = lu_ucred(env);
+ ucred->uc_valid = UCRED_INIT;
+}
+
+#define ECHO_MD_CTX_TAG (LCT_REMEMBER | LCT_MD_THREAD)
+#define ECHO_MD_SES_TAG (LCT_REMEMBER | LCT_SESSION)
+static int echo_md_handler(struct echo_device *ed, int command,
+ char *path, int path_len, __u64 id, int count,
+ struct obd_ioctl_data *data)
+{
+ struct echo_thread_info *info;
+ struct lu_device *ld = ed->ed_next;
+ struct lu_env *env;
+ int refcheck;
+ struct lu_object *parent;
+ char *name = NULL;
+ int namelen = data->ioc_plen2;
+ int rc = 0;
+ ENTRY;
+
+ if (ld == NULL) {
+ CERROR("MD echo client is not being initialized properly\n");
+ RETURN(-EINVAL);
+ }
+
+ if (strcmp(ld->ld_type->ldt_name, LUSTRE_MDD_NAME)) {
+ CERROR("Only support MDD layer right now!\n");
+ RETURN(-EINVAL);
+ }
+
+ env = cl_env_get(&refcheck);
+ if (IS_ERR(env))
+ RETURN(PTR_ERR(env));
+
+ rc = lu_env_refill_by_tags(env, ECHO_MD_CTX_TAG, ECHO_MD_SES_TAG);
+ if (rc != 0)
+ GOTO(out_env, rc);
+
+ /* init big_lmm buffer */
+ info = echo_env_info(env);
+ LASSERT(info->eti_big_lmm == NULL);
+ OBD_ALLOC_LARGE(info->eti_big_lmm, MIN_MD_SIZE);
+ if (info->eti_big_lmm == NULL)
+ GOTO(out_env, rc = -ENOMEM);
+ info->eti_big_lmmsize = MIN_MD_SIZE;
+
+ parent = echo_resolve_path(env, ed, path, path_len);
+ if (IS_ERR(parent)) {
+ CERROR("Can not resolve the path %s: rc = %ld\n", path,
+ PTR_ERR(parent));
+ GOTO(out_free, rc = PTR_ERR(parent));
+ }
+
+ if (namelen > 0) {
+ OBD_ALLOC(name, namelen + 1);
+ if (name == NULL)
+ GOTO(out_put, rc = -ENOMEM);
+ if (copy_from_user(name, data->ioc_pbuf2, namelen))
+ GOTO(out_name, rc = -EFAULT);
+ }
+
+ echo_ucred_init(env);
+
+ switch (command) {
+ case ECHO_MD_CREATE:
+ case ECHO_MD_MKDIR: {
+ struct echo_thread_info *info = echo_env_info(env);
+ __u32 mode = data->ioc_obdo2.o_mode;
+ struct lu_fid *fid = &info->eti_fid;
+ int stripe_count = (int)data->ioc_obdo2.o_misc;
+ int stripe_index = (int)data->ioc_obdo2.o_stripe_idx;
+
+ rc = ostid_to_fid(fid, &data->ioc_obdo1.o_oi, 0);
+ if (rc != 0)
+ break;
+
+ /* In the function below, .hs_keycmp resolves to
+ * lu_obj_hop_keycmp() */
+ /* coverity[overrun-buffer-val] */
+ rc = echo_create_md_object(env, ed, parent, fid, name, namelen,
+ id, mode, count, stripe_count,
+ stripe_index);
+ break;
+ }
+ case ECHO_MD_DESTROY:
+ case ECHO_MD_RMDIR: {
+ __u32 mode = data->ioc_obdo2.o_mode;
+
+ rc = echo_destroy_object(env, ed, parent, name, namelen,
+ id, mode, count);
+ break;
+ }
+ case ECHO_MD_LOOKUP:
+ rc = echo_lookup_object(env, ed, parent, id, count);
+ break;
+ case ECHO_MD_GETATTR:
+ rc = echo_getattr_object(env, ed, parent, id, count);
+ break;
+ case ECHO_MD_SETATTR:
+ rc = echo_setattr_object(env, ed, parent, id, count);
+ break;
+ default:
+ CERROR("unknown command %d\n", command);
+ rc = -EINVAL;
+ break;
+ }
+ echo_ucred_fini(env);
+
+out_name:
+ if (name != NULL)
+ OBD_FREE(name, namelen + 1);
+out_put:
+ lu_object_put(env, parent);
+out_free:
+ LASSERT(info->eti_big_lmm);
+ OBD_FREE_LARGE(info->eti_big_lmm, info->eti_big_lmmsize);
+ info->eti_big_lmm = NULL;
+ info->eti_big_lmmsize = 0;
+out_env:
+ cl_env_put(env, &refcheck);
+ return rc;
+}
+
+static int echo_create_object(const struct lu_env *env, struct echo_device *ed,
+ int on_target, struct obdo *oa, void *ulsm,
+ int ulsm_nob, struct obd_trans_info *oti)
+{
+ struct echo_object *eco;
+ struct echo_client_obd *ec = ed->ed_ec;
+ struct lov_stripe_md *lsm = NULL;
+ int rc;
+ int created = 0;
+ ENTRY;
+
+ if ((oa->o_valid & OBD_MD_FLID) == 0 && /* no obj id */
+ (on_target || /* set_stripe */
+ ec->ec_nstripes != 0)) { /* LOV */
+ CERROR ("No valid oid\n");
+ RETURN(-EINVAL);
+ }
+
+ rc = echo_alloc_memmd(ed, &lsm);
+ if (rc < 0) {
+ CERROR("Cannot allocate md: rc = %d\n", rc);
+ GOTO(failed, rc);
+ }
+
+ if (ulsm != NULL) {
+ int i, idx;
+
+ rc = echo_copyin_lsm (ed, lsm, ulsm, ulsm_nob);
+ if (rc != 0)
+ GOTO(failed, rc);
+
+ if (lsm->lsm_stripe_count == 0)
+ lsm->lsm_stripe_count = ec->ec_nstripes;
+
+ if (lsm->lsm_stripe_size == 0)
+ lsm->lsm_stripe_size = PAGE_CACHE_SIZE;
+
+ idx = cfs_rand();
+
+ /* setup stripes: indices + default ids if required */
+ for (i = 0; i < lsm->lsm_stripe_count; i++) {
+ if (ostid_id(&lsm->lsm_oinfo[i]->loi_oi) == 0)
+ lsm->lsm_oinfo[i]->loi_oi = lsm->lsm_oi;
+
+ lsm->lsm_oinfo[i]->loi_ost_idx =
+ (idx + i) % ec->ec_nstripes;
+ }
+ }
+
+ /* setup object ID here for !on_target and LOV hint */
+ if (oa->o_valid & OBD_MD_FLID) {
+ LASSERT(oa->o_valid & OBD_MD_FLGROUP);
+ lsm->lsm_oi = oa->o_oi;
+ }
+
+ if (ostid_id(&lsm->lsm_oi) == 0)
+ ostid_set_id(&lsm->lsm_oi, ++last_object_id);
+
+ rc = 0;
+ if (on_target) {
+ /* Only echo objects are allowed to be created */
+ LASSERT((oa->o_valid & OBD_MD_FLGROUP) &&
+ (ostid_seq(&oa->o_oi) == FID_SEQ_ECHO));
+ rc = obd_create(env, ec->ec_exp, oa, &lsm, oti);
+ if (rc != 0) {
+ CERROR("Cannot create objects: rc = %d\n", rc);
+ GOTO(failed, rc);
+ }
+ created = 1;
+ }
+
+ /* See what object ID we were given */
+ oa->o_oi = lsm->lsm_oi;
+ oa->o_valid |= OBD_MD_FLID;
+
+ eco = cl_echo_object_find(ed, &lsm);
+ if (IS_ERR(eco))
+ GOTO(failed, rc = PTR_ERR(eco));
+ cl_echo_object_put(eco);
+
+ CDEBUG(D_INFO, "oa oid "DOSTID"\n", POSTID(&oa->o_oi));
+ EXIT;
+
+ failed:
+ if (created && rc)
+ obd_destroy(env, ec->ec_exp, oa, lsm, oti, NULL, NULL);
+ if (lsm)
+ echo_free_memmd(ed, &lsm);
+ if (rc)
+ CERROR("create object failed with: rc = %d\n", rc);
+ return (rc);
+}
+
+static int echo_get_object(struct echo_object **ecop, struct echo_device *ed,
+ struct obdo *oa)
+{
+ struct lov_stripe_md *lsm = NULL;
+ struct echo_object *eco;
+ int rc;
+ ENTRY;
+
+ if ((oa->o_valid & OBD_MD_FLID) == 0 || ostid_id(&oa->o_oi) == 0) {
+ /* disallow use of object id 0 */
+ CERROR ("No valid oid\n");
+ RETURN(-EINVAL);
+ }
+
+ rc = echo_alloc_memmd(ed, &lsm);
+ if (rc < 0)
+ RETURN(rc);
+
+ lsm->lsm_oi = oa->o_oi;
+ if (!(oa->o_valid & OBD_MD_FLGROUP))
+ ostid_set_seq_echo(&lsm->lsm_oi);
+
+ rc = 0;
+ eco = cl_echo_object_find(ed, &lsm);
+ if (!IS_ERR(eco))
+ *ecop = eco;
+ else
+ rc = PTR_ERR(eco);
+ if (lsm)
+ echo_free_memmd(ed, &lsm);
+ RETURN(rc);
+}
+
+static void echo_put_object(struct echo_object *eco)
+{
+ if (cl_echo_object_put(eco))
+ CERROR("echo client: drop an object failed");
+}
+
+static void
+echo_get_stripe_off_id (struct lov_stripe_md *lsm, obd_off *offp, obd_id *idp)
+{
+ unsigned long stripe_count;
+ unsigned long stripe_size;
+ unsigned long width;
+ unsigned long woffset;
+ int stripe_index;
+ obd_off offset;
+
+ if (lsm->lsm_stripe_count <= 1)
+ return;
+
+ offset = *offp;
+ stripe_size = lsm->lsm_stripe_size;
+ stripe_count = lsm->lsm_stripe_count;
+
+ /* width = # bytes in all stripes */
+ width = stripe_size * stripe_count;
+
+ /* woffset = offset within a width; offset = whole number of widths */
+ woffset = do_div (offset, width);
+
+ stripe_index = woffset / stripe_size;
+
+ *idp = ostid_id(&lsm->lsm_oinfo[stripe_index]->loi_oi);
+ *offp = offset * stripe_size + woffset % stripe_size;
+}
+
+static void
+echo_client_page_debug_setup(struct lov_stripe_md *lsm,
+ struct page *page, int rw, obd_id id,
+ obd_off offset, obd_off count)
+{
+ char *addr;
+ obd_off stripe_off;
+ obd_id stripe_id;
+ int delta;
+
+ /* no partial pages on the client */
+ LASSERT(count == PAGE_CACHE_SIZE);
+
+ addr = kmap(page);
+
+ for (delta = 0; delta < PAGE_CACHE_SIZE; delta += OBD_ECHO_BLOCK_SIZE) {
+ if (rw == OBD_BRW_WRITE) {
+ stripe_off = offset + delta;
+ stripe_id = id;
+ echo_get_stripe_off_id(lsm, &stripe_off, &stripe_id);
+ } else {
+ stripe_off = 0xdeadbeef00c0ffeeULL;
+ stripe_id = 0xdeadbeef00c0ffeeULL;
+ }
+ block_debug_setup(addr + delta, OBD_ECHO_BLOCK_SIZE,
+ stripe_off, stripe_id);
+ }
+
+ kunmap(page);
+}
+
+static int echo_client_page_debug_check(struct lov_stripe_md *lsm,
+ struct page *page, obd_id id,
+ obd_off offset, obd_off count)
+{
+ obd_off stripe_off;
+ obd_id stripe_id;
+ char *addr;
+ int delta;
+ int rc;
+ int rc2;
+
+ /* no partial pages on the client */
+ LASSERT(count == PAGE_CACHE_SIZE);
+
+ addr = kmap(page);
+
+ for (rc = delta = 0; delta < PAGE_CACHE_SIZE; delta += OBD_ECHO_BLOCK_SIZE) {
+ stripe_off = offset + delta;
+ stripe_id = id;
+ echo_get_stripe_off_id (lsm, &stripe_off, &stripe_id);
+
+ rc2 = block_debug_check("test_brw",
+ addr + delta, OBD_ECHO_BLOCK_SIZE,
+ stripe_off, stripe_id);
+ if (rc2 != 0) {
+ CERROR ("Error in echo object "LPX64"\n", id);
+ rc = rc2;
+ }
+ }
+
+ kunmap(page);
+ return rc;
+}
+
+static int echo_client_kbrw(struct echo_device *ed, int rw, struct obdo *oa,
+ struct echo_object *eco, obd_off offset,
+ obd_size count, int async,
+ struct obd_trans_info *oti)
+{
+ struct lov_stripe_md *lsm = eco->eo_lsm;
+ obd_count npages;
+ struct brw_page *pga;
+ struct brw_page *pgp;
+ struct page **pages;
+ obd_off off;
+ int i;
+ int rc;
+ int verify;
+ int gfp_mask;
+ int brw_flags = 0;
+ ENTRY;
+
+ verify = (ostid_id(&oa->o_oi) != ECHO_PERSISTENT_OBJID &&
+ (oa->o_valid & OBD_MD_FLFLAGS) != 0 &&
+ (oa->o_flags & OBD_FL_DEBUG_CHECK) != 0);
+
+ gfp_mask = ((ostid_id(&oa->o_oi) & 2) == 0) ? GFP_IOFS : GFP_HIGHUSER;
+
+ LASSERT(rw == OBD_BRW_WRITE || rw == OBD_BRW_READ);
+ LASSERT(lsm != NULL);
+ LASSERT(ostid_id(&lsm->lsm_oi) == ostid_id(&oa->o_oi));
+
+ if (count <= 0 ||
+ (count & (~CFS_PAGE_MASK)) != 0)
+ RETURN(-EINVAL);
+
+ /* XXX think again with misaligned I/O */
+ npages = count >> PAGE_CACHE_SHIFT;
+
+ if (rw == OBD_BRW_WRITE)
+ brw_flags = OBD_BRW_ASYNC;
+
+ OBD_ALLOC(pga, npages * sizeof(*pga));
+ if (pga == NULL)
+ RETURN(-ENOMEM);
+
+ OBD_ALLOC(pages, npages * sizeof(*pages));
+ if (pages == NULL) {
+ OBD_FREE(pga, npages * sizeof(*pga));
+ RETURN(-ENOMEM);
+ }
+
+ for (i = 0, pgp = pga, off = offset;
+ i < npages;
+ i++, pgp++, off += PAGE_CACHE_SIZE) {
+
+ LASSERT (pgp->pg == NULL); /* for cleanup */
+
+ rc = -ENOMEM;
+ OBD_PAGE_ALLOC(pgp->pg, gfp_mask);
+ if (pgp->pg == NULL)
+ goto out;
+
+ pages[i] = pgp->pg;
+ pgp->count = PAGE_CACHE_SIZE;
+ pgp->off = off;
+ pgp->flag = brw_flags;
+
+ if (verify)
+ echo_client_page_debug_setup(lsm, pgp->pg, rw,
+ ostid_id(&oa->o_oi), off,
+ pgp->count);
+ }
+
+ /* brw mode can only be used at client */
+ LASSERT(ed->ed_next != NULL);
+ rc = cl_echo_object_brw(eco, rw, offset, pages, npages, async);
+
+ out:
+ if (rc != 0 || rw != OBD_BRW_READ)
+ verify = 0;
+
+ for (i = 0, pgp = pga; i < npages; i++, pgp++) {
+ if (pgp->pg == NULL)
+ continue;
+
+ if (verify) {
+ int vrc;
+ vrc = echo_client_page_debug_check(lsm, pgp->pg,
+ ostid_id(&oa->o_oi),
+ pgp->off, pgp->count);
+ if (vrc != 0 && rc == 0)
+ rc = vrc;
+ }
+ OBD_PAGE_FREE(pgp->pg);
+ }
+ OBD_FREE(pga, npages * sizeof(*pga));
+ OBD_FREE(pages, npages * sizeof(*pages));
+ RETURN(rc);
+}
+
+static int echo_client_prep_commit(const struct lu_env *env,
+ struct obd_export *exp, int rw,
+ struct obdo *oa, struct echo_object *eco,
+ obd_off offset, obd_size count,
+ obd_size batch, struct obd_trans_info *oti,
+ int async)
+{
+ struct lov_stripe_md *lsm = eco->eo_lsm;
+ struct obd_ioobj ioo;
+ struct niobuf_local *lnb;
+ struct niobuf_remote *rnb;
+ obd_off off;
+ obd_size npages, tot_pages;
+ int i, ret = 0, brw_flags = 0;
+
+ ENTRY;
+
+ if (count <= 0 || (count & (~CFS_PAGE_MASK)) != 0 ||
+ (lsm != NULL && ostid_id(&lsm->lsm_oi) != ostid_id(&oa->o_oi)))
+ RETURN(-EINVAL);
+
+ npages = batch >> PAGE_CACHE_SHIFT;
+ tot_pages = count >> PAGE_CACHE_SHIFT;
+
+ OBD_ALLOC(lnb, npages * sizeof(struct niobuf_local));
+ OBD_ALLOC(rnb, npages * sizeof(struct niobuf_remote));
+
+ if (lnb == NULL || rnb == NULL)
+ GOTO(out, ret = -ENOMEM);
+
+ if (rw == OBD_BRW_WRITE && async)
+ brw_flags |= OBD_BRW_ASYNC;
+
+ obdo_to_ioobj(oa, &ioo);
+
+ off = offset;
+
+ for(; tot_pages; tot_pages -= npages) {
+ int lpages;
+
+ if (tot_pages < npages)
+ npages = tot_pages;
+
+ for (i = 0; i < npages; i++, off += PAGE_CACHE_SIZE) {
+ rnb[i].offset = off;
+ rnb[i].len = PAGE_CACHE_SIZE;
+ rnb[i].flags = brw_flags;
+ }
+
+ ioo.ioo_bufcnt = npages;
+ oti->oti_transno = 0;
+
+ lpages = npages;
+ ret = obd_preprw(env, rw, exp, oa, 1, &ioo, rnb, &lpages,
+ lnb, oti, NULL);
+ if (ret != 0)
+ GOTO(out, ret);
+ LASSERT(lpages == npages);
+
+ for (i = 0; i < lpages; i++) {
+ struct page *page = lnb[i].page;
+
+ /* read past eof? */
+ if (page == NULL && lnb[i].rc == 0)
+ continue;
+
+ if (async)
+ lnb[i].flags |= OBD_BRW_ASYNC;
+
+ if (ostid_id(&oa->o_oi) == ECHO_PERSISTENT_OBJID ||
+ (oa->o_valid & OBD_MD_FLFLAGS) == 0 ||
+ (oa->o_flags & OBD_FL_DEBUG_CHECK) == 0)
+ continue;
+
+ if (rw == OBD_BRW_WRITE)
+ echo_client_page_debug_setup(lsm, page, rw,
+ ostid_id(&oa->o_oi),
+ rnb[i].offset,
+ rnb[i].len);
+ else
+ echo_client_page_debug_check(lsm, page,
+ ostid_id(&oa->o_oi),
+ rnb[i].offset,
+ rnb[i].len);
+ }
+
+ ret = obd_commitrw(env, rw, exp, oa, 1, &ioo,
+ rnb, npages, lnb, oti, ret);
+ if (ret != 0)
+ GOTO(out, ret);
+
+ /* Reset oti otherwise it would confuse ldiskfs. */
+ memset(oti, 0, sizeof(*oti));
+
+ /* Reuse env context. */
+ lu_context_exit((struct lu_context *)&env->le_ctx);
+ lu_context_enter((struct lu_context *)&env->le_ctx);
+ }
+
+out:
+ if (lnb)
+ OBD_FREE(lnb, npages * sizeof(struct niobuf_local));
+ if (rnb)
+ OBD_FREE(rnb, npages * sizeof(struct niobuf_remote));
+ RETURN(ret);
+}
+
+static int echo_client_brw_ioctl(const struct lu_env *env, int rw,
+ struct obd_export *exp,
+ struct obd_ioctl_data *data,
+ struct obd_trans_info *dummy_oti)
+{
+ struct obd_device *obd = class_exp2obd(exp);
+ struct echo_device *ed = obd2echo_dev(obd);
+ struct echo_client_obd *ec = ed->ed_ec;
+ struct obdo *oa = &data->ioc_obdo1;
+ struct echo_object *eco;
+ int rc;
+ int async = 1;
+ long test_mode;
+ ENTRY;
+
+ LASSERT(oa->o_valid & OBD_MD_FLGROUP);
+
+ rc = echo_get_object(&eco, ed, oa);
+ if (rc)
+ RETURN(rc);
+
+ oa->o_valid &= ~OBD_MD_FLHANDLE;
+
+ /* OFD/obdfilter works only via prep/commit */
+ test_mode = (long)data->ioc_pbuf1;
+ if (test_mode == 1)
+ async = 0;
+
+ if (ed->ed_next == NULL && test_mode != 3) {
+ test_mode = 3;
+ data->ioc_plen1 = data->ioc_count;
+ }
+
+ /* Truncate batch size to maximum */
+ if (data->ioc_plen1 > PTLRPC_MAX_BRW_SIZE)
+ data->ioc_plen1 = PTLRPC_MAX_BRW_SIZE;
+
+ switch (test_mode) {
+ case 1:
+ /* fall through */
+ case 2:
+ rc = echo_client_kbrw(ed, rw, oa,
+ eco, data->ioc_offset,
+ data->ioc_count, async, dummy_oti);
+ break;
+ case 3:
+ rc = echo_client_prep_commit(env, ec->ec_exp, rw, oa,
+ eco, data->ioc_offset,
+ data->ioc_count, data->ioc_plen1,
+ dummy_oti, async);
+ break;
+ default:
+ rc = -EINVAL;
+ }
+ echo_put_object(eco);
+ RETURN(rc);
+}
+
+static int
+echo_client_enqueue(struct obd_export *exp, struct obdo *oa,
+ int mode, obd_off offset, obd_size nob)
+{
+ struct echo_device *ed = obd2echo_dev(exp->exp_obd);
+ struct lustre_handle *ulh = &oa->o_handle;
+ struct echo_object *eco;
+ obd_off end;
+ int rc;
+ ENTRY;
+
+ if (ed->ed_next == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ if (!(mode == LCK_PR || mode == LCK_PW))
+ RETURN(-EINVAL);
+
+ if ((offset & (~CFS_PAGE_MASK)) != 0 ||
+ (nob & (~CFS_PAGE_MASK)) != 0)
+ RETURN(-EINVAL);
+
+ rc = echo_get_object (&eco, ed, oa);
+ if (rc != 0)
+ RETURN(rc);
+
+ end = (nob == 0) ? ((obd_off) -1) : (offset + nob - 1);
+ rc = cl_echo_enqueue(eco, offset, end, mode, &ulh->cookie);
+ if (rc == 0) {
+ oa->o_valid |= OBD_MD_FLHANDLE;
+ CDEBUG(D_INFO, "Cookie is "LPX64"\n", ulh->cookie);
+ }
+ echo_put_object(eco);
+ RETURN(rc);
+}
+
+static int
+echo_client_cancel(struct obd_export *exp, struct obdo *oa)
+{
+ struct echo_device *ed = obd2echo_dev(exp->exp_obd);
+ __u64 cookie = oa->o_handle.cookie;
+
+ if ((oa->o_valid & OBD_MD_FLHANDLE) == 0)
+ return -EINVAL;
+
+ CDEBUG(D_INFO, "Cookie is "LPX64"\n", cookie);
+ return cl_echo_cancel(ed, cookie);
+}
+
+static int
+echo_client_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
+ void *karg, void *uarg)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct echo_device *ed = obd2echo_dev(obd);
+ struct echo_client_obd *ec = ed->ed_ec;
+ struct echo_object *eco;
+ struct obd_ioctl_data *data = karg;
+ struct obd_trans_info dummy_oti;
+ struct lu_env *env;
+ struct oti_req_ack_lock *ack_lock;
+ struct obdo *oa;
+ struct lu_fid fid;
+ int rw = OBD_BRW_READ;
+ int rc = 0;
+ int i;
+ ENTRY;
+
+ memset(&dummy_oti, 0, sizeof(dummy_oti));
+
+ oa = &data->ioc_obdo1;
+ if (!(oa->o_valid & OBD_MD_FLGROUP)) {
+ oa->o_valid |= OBD_MD_FLGROUP;
+ ostid_set_seq_echo(&oa->o_oi);
+ }
+
+ /* This FID is unpacked just for validation at this point */
+ rc = ostid_to_fid(&fid, &oa->o_oi, 0);
+ if (rc < 0)
+ RETURN(rc);
+
+ OBD_ALLOC_PTR(env);
+ if (env == NULL)
+ RETURN(-ENOMEM);
+
+ rc = lu_env_init(env, LCT_DT_THREAD);
+ if (rc)
+ GOTO(out, rc = -ENOMEM);
+
+ switch (cmd) {
+ case OBD_IOC_CREATE: /* may create echo object */
+ if (!cfs_capable(CFS_CAP_SYS_ADMIN))
+ GOTO (out, rc = -EPERM);
+
+ rc = echo_create_object(env, ed, 1, oa, data->ioc_pbuf1,
+ data->ioc_plen1, &dummy_oti);
+ GOTO(out, rc);
+
+ case OBD_IOC_ECHO_MD: {
+ int count;
+ int cmd;
+ char *dir = NULL;
+ int dirlen;
+ __u64 id;
+
+ if (!cfs_capable(CFS_CAP_SYS_ADMIN))
+ GOTO(out, rc = -EPERM);
+
+ count = data->ioc_count;
+ cmd = data->ioc_command;
+
+ id = ostid_id(&data->ioc_obdo2.o_oi);
+
+ dirlen = data->ioc_plen1;
+ OBD_ALLOC(dir, dirlen + 1);
+ if (dir == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ if (copy_from_user(dir, data->ioc_pbuf1, dirlen)) {
+ OBD_FREE(dir, data->ioc_plen1 + 1);
+ GOTO(out, rc = -EFAULT);
+ }
+
+ rc = echo_md_handler(ed, cmd, dir, dirlen, id, count, data);
+ OBD_FREE(dir, dirlen + 1);
+ GOTO(out, rc);
+ }
+ case OBD_IOC_ECHO_ALLOC_SEQ: {
+ struct lu_env *cl_env;
+ int refcheck;
+ __u64 seq;
+ int max_count;
+
+ if (!cfs_capable(CFS_CAP_SYS_ADMIN))
+ GOTO(out, rc = -EPERM);
+
+ cl_env = cl_env_get(&refcheck);
+ if (IS_ERR(cl_env))
+ GOTO(out, rc = PTR_ERR(cl_env));
+
+ rc = lu_env_refill_by_tags(cl_env, ECHO_MD_CTX_TAG,
+ ECHO_MD_SES_TAG);
+ if (rc != 0) {
+ cl_env_put(cl_env, &refcheck);
+ GOTO(out, rc);
+ }
+
+ rc = seq_client_get_seq(cl_env, ed->ed_cl_seq, &seq);
+ cl_env_put(cl_env, &refcheck);
+ if (rc < 0) {
+ CERROR("%s: Can not alloc seq: rc = %d\n",
+ obd->obd_name, rc);
+ GOTO(out, rc);
+ }
+
+ if (copy_to_user(data->ioc_pbuf1, &seq, data->ioc_plen1))
+ return -EFAULT;
+
+ max_count = LUSTRE_METADATA_SEQ_MAX_WIDTH;
+ if (copy_to_user(data->ioc_pbuf2, &max_count,
+ data->ioc_plen2))
+ return -EFAULT;
+ GOTO(out, rc);
+ }
+ case OBD_IOC_DESTROY:
+ if (!cfs_capable(CFS_CAP_SYS_ADMIN))
+ GOTO (out, rc = -EPERM);
+
+ rc = echo_get_object(&eco, ed, oa);
+ if (rc == 0) {
+ rc = obd_destroy(env, ec->ec_exp, oa, eco->eo_lsm,
+ &dummy_oti, NULL, NULL);
+ if (rc == 0)
+ eco->eo_deleted = 1;
+ echo_put_object(eco);
+ }
+ GOTO(out, rc);
+
+ case OBD_IOC_GETATTR:
+ rc = echo_get_object(&eco, ed, oa);
+ if (rc == 0) {
+ struct obd_info oinfo = { { { 0 } } };
+ oinfo.oi_md = eco->eo_lsm;
+ oinfo.oi_oa = oa;
+ rc = obd_getattr(env, ec->ec_exp, &oinfo);
+ echo_put_object(eco);
+ }
+ GOTO(out, rc);
+
+ case OBD_IOC_SETATTR:
+ if (!cfs_capable(CFS_CAP_SYS_ADMIN))
+ GOTO (out, rc = -EPERM);
+
+ rc = echo_get_object(&eco, ed, oa);
+ if (rc == 0) {
+ struct obd_info oinfo = { { { 0 } } };
+ oinfo.oi_oa = oa;
+ oinfo.oi_md = eco->eo_lsm;
+
+ rc = obd_setattr(env, ec->ec_exp, &oinfo, NULL);
+ echo_put_object(eco);
+ }
+ GOTO(out, rc);
+
+ case OBD_IOC_BRW_WRITE:
+ if (!cfs_capable(CFS_CAP_SYS_ADMIN))
+ GOTO (out, rc = -EPERM);
+
+ rw = OBD_BRW_WRITE;
+ /* fall through */
+ case OBD_IOC_BRW_READ:
+ rc = echo_client_brw_ioctl(env, rw, exp, data, &dummy_oti);
+ GOTO(out, rc);
+
+ case ECHO_IOC_GET_STRIPE:
+ rc = echo_get_object(&eco, ed, oa);
+ if (rc == 0) {
+ rc = echo_copyout_lsm(eco->eo_lsm, data->ioc_pbuf1,
+ data->ioc_plen1);
+ echo_put_object(eco);
+ }
+ GOTO(out, rc);
+
+ case ECHO_IOC_SET_STRIPE:
+ if (!cfs_capable(CFS_CAP_SYS_ADMIN))
+ GOTO (out, rc = -EPERM);
+
+ if (data->ioc_pbuf1 == NULL) { /* unset */
+ rc = echo_get_object(&eco, ed, oa);
+ if (rc == 0) {
+ eco->eo_deleted = 1;
+ echo_put_object(eco);
+ }
+ } else {
+ rc = echo_create_object(env, ed, 0, oa,
+ data->ioc_pbuf1,
+ data->ioc_plen1, &dummy_oti);
+ }
+ GOTO (out, rc);
+
+ case ECHO_IOC_ENQUEUE:
+ if (!cfs_capable(CFS_CAP_SYS_ADMIN))
+ GOTO (out, rc = -EPERM);
+
+ rc = echo_client_enqueue(exp, oa,
+ data->ioc_conn1, /* lock mode */
+ data->ioc_offset,
+ data->ioc_count);/*extent*/
+ GOTO (out, rc);
+
+ case ECHO_IOC_CANCEL:
+ rc = echo_client_cancel(exp, oa);
+ GOTO (out, rc);
+
+ default:
+ CERROR ("echo_ioctl(): unrecognised ioctl %#x\n", cmd);
+ GOTO (out, rc = -ENOTTY);
+ }
+
+ EXIT;
+out:
+ lu_env_fini(env);
+ OBD_FREE_PTR(env);
+
+ /* XXX this should be in a helper also called by target_send_reply */
+ for (ack_lock = dummy_oti.oti_ack_locks, i = 0; i < 4;
+ i++, ack_lock++) {
+ if (!ack_lock->mode)
+ break;
+ ldlm_lock_decref(&ack_lock->lock, ack_lock->mode);
+ }
+
+ return rc;
+}
+
+static int echo_client_setup(const struct lu_env *env,
+ struct obd_device *obddev, struct lustre_cfg *lcfg)
+{
+ struct echo_client_obd *ec = &obddev->u.echo_client;
+ struct obd_device *tgt;
+ struct obd_uuid echo_uuid = { "ECHO_UUID" };
+ struct obd_connect_data *ocd = NULL;
+ int rc;
+ ENTRY;
+
+ if (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
+ CERROR("requires a TARGET OBD name\n");
+ RETURN(-EINVAL);
+ }
+
+ tgt = class_name2obd(lustre_cfg_string(lcfg, 1));
+ if (!tgt || !tgt->obd_attached || !tgt->obd_set_up) {
+ CERROR("device not attached or not set up (%s)\n",
+ lustre_cfg_string(lcfg, 1));
+ RETURN(-EINVAL);
+ }
+
+ spin_lock_init(&ec->ec_lock);
+ INIT_LIST_HEAD (&ec->ec_objects);
+ INIT_LIST_HEAD (&ec->ec_locks);
+ ec->ec_unique = 0;
+ ec->ec_nstripes = 0;
+
+ if (!strcmp(tgt->obd_type->typ_name, LUSTRE_MDT_NAME)) {
+ lu_context_tags_update(ECHO_MD_CTX_TAG);
+ lu_session_tags_update(ECHO_MD_SES_TAG);
+ RETURN(0);
+ }
+
+ OBD_ALLOC(ocd, sizeof(*ocd));
+ if (ocd == NULL) {
+ CERROR("Can't alloc ocd connecting to %s\n",
+ lustre_cfg_string(lcfg, 1));
+ return -ENOMEM;
+ }
+
+ ocd->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_REQPORTAL |
+ OBD_CONNECT_BRW_SIZE |
+ OBD_CONNECT_GRANT | OBD_CONNECT_FULL20 |
+ OBD_CONNECT_64BITHASH | OBD_CONNECT_LVB_TYPE |
+ OBD_CONNECT_FID;
+ ocd->ocd_brw_size = DT_MAX_BRW_SIZE;
+ ocd->ocd_version = LUSTRE_VERSION_CODE;
+ ocd->ocd_group = FID_SEQ_ECHO;
+
+ rc = obd_connect(env, &ec->ec_exp, tgt, &echo_uuid, ocd, NULL);
+ if (rc == 0) {
+ /* Turn off pinger because it connects to tgt obd directly. */
+ spin_lock(&tgt->obd_dev_lock);
+ list_del_init(&ec->ec_exp->exp_obd_chain_timed);
+ spin_unlock(&tgt->obd_dev_lock);
+ }
+
+ OBD_FREE(ocd, sizeof(*ocd));
+
+ if (rc != 0) {
+ CERROR("fail to connect to device %s\n",
+ lustre_cfg_string(lcfg, 1));
+ return (rc);
+ }
+
+ RETURN(rc);
+}
+
+static int echo_client_cleanup(struct obd_device *obddev)
+{
+ struct echo_device *ed = obd2echo_dev(obddev);
+ struct echo_client_obd *ec = &obddev->u.echo_client;
+ int rc;
+ ENTRY;
+
+ /*Do nothing for Metadata echo client*/
+ if (ed == NULL )
+ RETURN(0);
+
+ if (ed->ed_next_ismd) {
+ lu_context_tags_clear(ECHO_MD_CTX_TAG);
+ lu_session_tags_clear(ECHO_MD_SES_TAG);
+ RETURN(0);
+ }
+
+ if (!list_empty(&obddev->obd_exports)) {
+ CERROR("still has clients!\n");
+ RETURN(-EBUSY);
+ }
+
+ LASSERT(atomic_read(&ec->ec_exp->exp_refcount) > 0);
+ rc = obd_disconnect(ec->ec_exp);
+ if (rc != 0)
+ CERROR("fail to disconnect device: %d\n", rc);
+
+ RETURN(rc);
+}
+
+static int echo_client_connect(const struct lu_env *env,
+ struct obd_export **exp,
+ struct obd_device *src, struct obd_uuid *cluuid,
+ struct obd_connect_data *data, void *localdata)
+{
+ int rc;
+ struct lustre_handle conn = { 0 };
+
+ ENTRY;
+ rc = class_connect(&conn, src, cluuid);
+ if (rc == 0) {
+ *exp = class_conn2export(&conn);
+ }
+
+ RETURN (rc);
+}
+
+static int echo_client_disconnect(struct obd_export *exp)
+{
+#if 0
+ struct obd_device *obd;
+ struct echo_client_obd *ec;
+ struct ec_lock *ecl;
+#endif
+ int rc;
+ ENTRY;
+
+ if (exp == NULL)
+ GOTO(out, rc = -EINVAL);
+
+#if 0
+ obd = exp->exp_obd;
+ ec = &obd->u.echo_client;
+
+ /* no more contention on export's lock list */
+ while (!list_empty (&exp->exp_ec_data.eced_locks)) {
+ ecl = list_entry (exp->exp_ec_data.eced_locks.next,
+ struct ec_lock, ecl_exp_chain);
+ list_del (&ecl->ecl_exp_chain);
+
+ rc = obd_cancel(ec->ec_exp, ecl->ecl_object->eco_lsm,
+ ecl->ecl_mode, &ecl->ecl_lock_handle);
+
+ CDEBUG (D_INFO, "Cancel lock on object "LPX64" on disconnect "
+ "(%d)\n", ecl->ecl_object->eco_id, rc);
+
+ echo_put_object (ecl->ecl_object);
+ OBD_FREE (ecl, sizeof (*ecl));
+ }
+#endif
+
+ rc = class_disconnect(exp);
+ GOTO(out, rc);
+ out:
+ return rc;
+}
+
+static struct obd_ops echo_client_obd_ops = {
+ .o_owner = THIS_MODULE,
+
+#if 0
+ .o_setup = echo_client_setup,
+ .o_cleanup = echo_client_cleanup,
+#endif
+
+ .o_iocontrol = echo_client_iocontrol,
+ .o_connect = echo_client_connect,
+ .o_disconnect = echo_client_disconnect
+};
+
+int echo_client_init(void)
+{
+ struct lprocfs_static_vars lvars = { 0 };
+ int rc;
+
+ lprocfs_echo_init_vars(&lvars);
+
+ rc = lu_kmem_init(echo_caches);
+ if (rc == 0) {
+ rc = class_register_type(&echo_client_obd_ops, NULL,
+ lvars.module_vars,
+ LUSTRE_ECHO_CLIENT_NAME,
+ &echo_device_type);
+ if (rc)
+ lu_kmem_fini(echo_caches);
+ }
+ return rc;
+}
+
+void echo_client_exit(void)
+{
+ class_unregister_type(LUSTRE_ECHO_CLIENT_NAME);
+ lu_kmem_fini(echo_caches);
+}
+
+static int __init obdecho_init(void)
+{
+ struct lprocfs_static_vars lvars;
+ int rc;
+
+ ENTRY;
+ LCONSOLE_INFO("Echo OBD driver; http://www.lustre.org/\n");
+
+ LASSERT(PAGE_CACHE_SIZE % OBD_ECHO_BLOCK_SIZE == 0);
+
+ lprocfs_echo_init_vars(&lvars);
+
+
+ rc = echo_client_init();
+
+ RETURN(rc);
+}
+
+static void /*__exit*/ obdecho_exit(void)
+{
+ echo_client_exit();
+
+}
+
+MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
+MODULE_DESCRIPTION("Lustre Testing Echo OBD driver");
+MODULE_LICENSE("GPL");
+
+cfs_module(obdecho, LUSTRE_VERSION_STRING, obdecho_init, obdecho_exit);
+
+/** @} echo_client */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.