-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2012, 2016, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* cl_device and cl_device_type implementation for VVP layer.
*
* Author: Nikita Danilov <nikita.danilov@sun.com>
+ * Author: Jinshan Xiong <jinshan.xiong@intel.com>
*/
#define DEBUG_SUBSYSTEM S_LLITE
-#ifndef __KERNEL__
-# error This file is kernel only.
-#endif
-
#include <obd.h>
-#include <lustre_lite.h>
-
+#include "llite_internal.h"
#include "vvp_internal.h"
+#include <linux/kallsyms.h>
/*****************************************************************************
*
* "llite_" (var. "ll_") prefix.
*/
-cfs_mem_cache_t *vvp_page_kmem;
-cfs_mem_cache_t *vvp_thread_kmem;
-static cfs_mem_cache_t *vvp_session_kmem;
+static struct kmem_cache *ll_thread_kmem;
+struct kmem_cache *vvp_object_kmem;
+static struct kmem_cache *vvp_session_kmem;
+static struct kmem_cache *vvp_thread_kmem;
+
static struct lu_kmem_descr vvp_caches[] = {
- {
- .ckd_cache = &vvp_page_kmem,
- .ckd_name = "vvp_page_kmem",
- .ckd_size = sizeof (struct ccc_page)
- },
- {
- .ckd_cache = &vvp_thread_kmem,
- .ckd_name = "vvp_thread_kmem",
- .ckd_size = sizeof (struct vvp_thread_info),
- },
+ {
+ .ckd_cache = &ll_thread_kmem,
+ .ckd_name = "ll_thread_kmem",
+ .ckd_size = sizeof(struct ll_thread_info),
+ },
+ {
+ .ckd_cache = &vvp_object_kmem,
+ .ckd_name = "vvp_object_kmem",
+ .ckd_size = sizeof(struct vvp_object),
+ },
{
.ckd_cache = &vvp_session_kmem,
.ckd_name = "vvp_session_kmem",
.ckd_size = sizeof (struct vvp_session)
},
+ {
+ .ckd_cache = &vvp_thread_kmem,
+ .ckd_name = "vvp_thread_kmem",
+ .ckd_size = sizeof(struct vvp_thread_info),
+ },
{
.ckd_cache = NULL
}
};
-static void *vvp_key_init(const struct lu_context *ctx,
- struct lu_context_key *key)
+static void *ll_thread_key_init(const struct lu_context *ctx,
+ struct lu_context_key *key)
{
- struct vvp_thread_info *info;
+ struct ll_thread_info *lti;
+
+ OBD_SLAB_ALLOC_PTR_GFP(lti, ll_thread_kmem, GFP_NOFS);
+ if (lti == NULL)
+ lti = ERR_PTR(-ENOMEM);
- OBD_SLAB_ALLOC_PTR_GFP(info, vvp_thread_kmem, CFS_ALLOC_IO);
- if (info == NULL)
- info = ERR_PTR(-ENOMEM);
- return info;
+ return lti;
}
-static void vvp_key_fini(const struct lu_context *ctx,
- struct lu_context_key *key, void *data)
+static void ll_thread_key_fini(const struct lu_context *ctx,
+ struct lu_context_key *key, void *data)
{
- struct vvp_thread_info *info = data;
- OBD_SLAB_FREE_PTR(info, vvp_thread_kmem);
+ struct ll_thread_info *lti = data;
+
+ OBD_SLAB_FREE_PTR(lti, ll_thread_kmem);
}
+struct lu_context_key ll_thread_key = {
+ .lct_tags = LCT_CL_THREAD,
+ .lct_init = ll_thread_key_init,
+ .lct_fini = ll_thread_key_fini,
+};
+
static void *vvp_session_key_init(const struct lu_context *ctx,
- struct lu_context_key *key)
+ struct lu_context_key *key)
{
- struct vvp_session *session;
+ struct vvp_session *session;
- OBD_SLAB_ALLOC_PTR_GFP(session, vvp_session_kmem, CFS_ALLOC_IO);
- if (session == NULL)
- session = ERR_PTR(-ENOMEM);
- return session;
+ OBD_SLAB_ALLOC_PTR_GFP(session, vvp_session_kmem, GFP_NOFS);
+ if (session == NULL)
+ session = ERR_PTR(-ENOMEM);
+ return session;
}
static void vvp_session_key_fini(const struct lu_context *ctx,
OBD_SLAB_FREE_PTR(session, vvp_session_kmem);
}
-
-struct lu_context_key vvp_key = {
- .lct_tags = LCT_CL_THREAD,
- .lct_init = vvp_key_init,
- .lct_fini = vvp_key_fini
-};
-
struct lu_context_key vvp_session_key = {
.lct_tags = LCT_SESSION,
.lct_init = vvp_session_key_init,
.lct_fini = vvp_session_key_fini
};
+static void *vvp_thread_key_init(const struct lu_context *ctx,
+ struct lu_context_key *key)
+{
+ struct vvp_thread_info *vti;
+
+ OBD_SLAB_ALLOC_PTR_GFP(vti, vvp_thread_kmem, GFP_NOFS);
+ if (vti == NULL)
+ vti = ERR_PTR(-ENOMEM);
+ return vti;
+}
+
+static void vvp_thread_key_fini(const struct lu_context *ctx,
+ struct lu_context_key *key, void *data)
+{
+ struct vvp_thread_info *vti = data;
+ OBD_SLAB_FREE_PTR(vti, vvp_thread_kmem);
+}
+
+struct lu_context_key vvp_thread_key = {
+ .lct_tags = LCT_CL_THREAD,
+ .lct_init = vvp_thread_key_init,
+ .lct_fini = vvp_thread_key_fini,
+};
+
/* type constructor/destructor: vvp_type_{init,fini,start,stop}(). */
-LU_TYPE_INIT_FINI(vvp, &ccc_key, &ccc_session_key, &vvp_key, &vvp_session_key);
+LU_TYPE_INIT_FINI(vvp, &ll_thread_key, &vvp_session_key, &vvp_thread_key);
static const struct lu_device_operations vvp_lu_ops = {
.ldo_object_alloc = vvp_object_alloc
};
-static const struct cl_device_operations vvp_cl_ops = {
- .cdo_req_init = ccc_req_init
-};
+static struct lu_device *vvp_device_free(const struct lu_env *env,
+ struct lu_device *d)
+{
+ struct vvp_device *vdv = lu2vvp_dev(d);
+ struct cl_site *site = lu2cl_site(d->ld_site);
+ struct lu_device *next = cl2lu_dev(vdv->vdv_next);
+
+ if (d->ld_site != NULL) {
+ cl_site_fini(site);
+ OBD_FREE_PTR(site);
+ }
+
+ cl_device_fini(lu2cl_dev(d));
+ OBD_FREE_PTR(vdv);
+ return next;
+}
static struct lu_device *vvp_device_alloc(const struct lu_env *env,
- struct lu_device_type *t,
- struct lustre_cfg *cfg)
+ struct lu_device_type *t,
+ struct lustre_cfg *cfg)
{
- return ccc_device_alloc(env, t, cfg, &vvp_lu_ops, &vvp_cl_ops);
+ struct vvp_device *vdv;
+ struct lu_device *lud;
+ struct cl_site *site;
+ int rc;
+ ENTRY;
+
+ OBD_ALLOC_PTR(vdv);
+ if (vdv == NULL)
+ RETURN(ERR_PTR(-ENOMEM));
+
+ lud = &vdv->vdv_cl.cd_lu_dev;
+ cl_device_init(&vdv->vdv_cl, t);
+ vvp2lu_dev(vdv)->ld_ops = &vvp_lu_ops;
+
+ OBD_ALLOC_PTR(site);
+ if (site != NULL) {
+ rc = cl_site_init(site, &vdv->vdv_cl);
+ if (rc == 0)
+ rc = lu_site_init_finish(&site->cs_lu);
+ else {
+ LASSERT(lud->ld_site == NULL);
+ CERROR("Cannot init lu_site, rc %d.\n", rc);
+ OBD_FREE_PTR(site);
+ }
+ } else
+ rc = -ENOMEM;
+ if (rc != 0) {
+ vvp_device_free(env, lud);
+ lud = ERR_PTR(rc);
+ }
+ RETURN(lud);
+}
+
+static int vvp_device_init(const struct lu_env *env, struct lu_device *d,
+ const char *name, struct lu_device *next)
+{
+ struct vvp_device *vdv;
+ int rc;
+ ENTRY;
+
+ vdv = lu2vvp_dev(d);
+ vdv->vdv_next = lu2cl_dev(next);
+
+ LASSERT(d->ld_site != NULL && next->ld_type != NULL);
+ next->ld_site = d->ld_site;
+ rc = next->ld_type->ldt_ops->ldto_device_init(
+ env, next, next->ld_type->ldt_name, NULL);
+ if (rc == 0) {
+ lu_device_get(next);
+ lu_ref_add(&next->ld_reference, "lu-stack", &lu_site_init);
+ }
+ RETURN(rc);
+}
+
+static struct lu_device *vvp_device_fini(const struct lu_env *env,
+ struct lu_device *d)
+{
+ return cl2lu_dev(lu2vvp_dev(d)->vdv_next);
}
static const struct lu_device_type_operations vvp_device_type_ops = {
.ldto_start = vvp_type_start,
.ldto_stop = vvp_type_stop,
- .ldto_device_alloc = vvp_device_alloc,
- .ldto_device_free = ccc_device_free,
- .ldto_device_init = ccc_device_init,
- .ldto_device_fini = ccc_device_fini
+ .ldto_device_alloc = vvp_device_alloc,
+ .ldto_device_free = vvp_device_free,
+ .ldto_device_init = vvp_device_init,
+ .ldto_device_fini = vvp_device_fini,
};
struct lu_device_type vvp_device_type = {
.ldt_ctx_tags = LCT_CL_THREAD
};
+#ifndef HAVE_ACCOUNT_PAGE_DIRTIED_EXPORT
+unsigned int (*vvp_account_page_dirtied)(struct page *page,
+ struct address_space *mapping);
+#endif
+
/**
* A mutex serializing calls to vvp_inode_fini() under extreme memory
* pressure, when environments cannot be allocated.
*/
int vvp_global_init(void)
{
- int result;
+ int rc;
+
+ rc = lu_kmem_init(vvp_caches);
+ if (rc != 0)
+ return rc;
+
+ rc = lu_device_type_init(&vvp_device_type);
+ if (rc != 0)
+ goto out_kmem;
+
+#ifndef HAVE_ACCOUNT_PAGE_DIRTIED_EXPORT
+ /*
+ * Kernel v5.2-5678-gac1c3e4 no longer exports account_page_dirtied
+ */
+ vvp_account_page_dirtied = (void *)
+ kallsyms_lookup_name("account_page_dirtied");
+ BUG_ON(!vvp_account_page_dirtied);
+#endif
- result = lu_kmem_init(vvp_caches);
- if (result == 0) {
- result = ccc_global_init(&vvp_device_type);
- if (result != 0)
- lu_kmem_fini(vvp_caches);
- }
- return result;
+ return 0;
+
+out_kmem:
+ lu_kmem_fini(vvp_caches);
+
+ return rc;
}
void vvp_global_fini(void)
{
- ccc_global_fini(&vvp_device_type);
- lu_kmem_fini(vvp_caches);
+ lu_device_type_fini(&vvp_device_type);
+ lu_kmem_fini(vvp_caches);
}
-
/*****************************************************************************
*
* mirror obd-devices into cl devices.
struct cl_device *cl;
struct lu_env *env;
int rc = 0;
- int refcheck;
+ __u16 refcheck;
sbi = ll_s2sbi(sb);
env = cl_env_get(&refcheck);
cl = cl_type_setup(env, NULL, &vvp_device_type,
sbi->ll_dt_exp->exp_obd->obd_lu_dev);
if (!IS_ERR(cl)) {
- cl2ccc_dev(cl)->cdv_sb = sb;
sbi->ll_cl = cl;
sbi->ll_site = cl2lu_dev(cl)->ld_site;
}
struct ll_sb_info *sbi;
struct lu_env *env;
struct cl_device *cld;
- int refcheck;
+ __u16 refcheck;
int result;
ENTRY;
CERROR("Cannot cleanup cl-stack due to memory shortage.\n");
result = PTR_ERR(env);
}
- /*
- * If mount failed (sbi->ll_cl == NULL), and this there are no other
- * mounts, stop device types manually (this usually happens
- * automatically when last device is destroyed).
- */
- lu_types_stop();
- RETURN(result);
+
+ RETURN(result);
}
/****************************************************************************
*
- * /proc/fs/lustre/llite/$MNT/dump_page_cache
+ * debugfs/lustre/llite/$MNT/dump_page_cache
*
****************************************************************************/
-/*
- * To represent contents of a page cache as a byte stream, following
- * information if encoded in 64bit offset:
- *
- * - file hash bucket in lu_site::ls_hash[] 28bits
- *
- * - how far file is from bucket head 4bits
- *
- * - page index 32bits
- *
- * First two data identify a file in the cache uniquely.
- */
-
-#define PGC_OBJ_SHIFT (32 + 4)
-#define PGC_DEPTH_SHIFT (32)
-
-struct vvp_pgcache_id {
- unsigned vpi_bucket;
- unsigned vpi_depth;
- uint32_t vpi_index;
+struct vvp_seq_private {
+ struct ll_sb_info *vsp_sbi;
+ struct lu_env *vsp_env;
+ u16 vsp_refcheck;
+ struct cl_object *vsp_clob;
+ struct rhashtable_iter vsp_iter;
+ u32 vsp_page_index;
+ /*
+ * prev_pos is the 'pos' of the last object returned
+ * by ->start of ->next.
+ */
+ loff_t vvp_prev_pos;
};
-static void vvp_pgcache_id_unpack(loff_t pos, struct vvp_pgcache_id *id)
-{
- CLASSERT(sizeof(pos) == sizeof(__u64));
-
- id->vpi_index = pos & 0xffffffff;
- id->vpi_depth = (pos >> PGC_DEPTH_SHIFT) & 0xf;
- id->vpi_bucket = ((unsigned long long)pos >> PGC_OBJ_SHIFT);
-}
-
-static loff_t vvp_pgcache_id_pack(struct vvp_pgcache_id *id)
-{
- return
- ((__u64)id->vpi_index) |
- ((__u64)id->vpi_depth << PGC_DEPTH_SHIFT) |
- ((__u64)id->vpi_bucket << PGC_OBJ_SHIFT);
-}
-
-static struct cl_object *vvp_pgcache_obj(const struct lu_env *env,
- struct lu_device *dev,
- struct vvp_pgcache_id *id)
-{
- struct hlist_head *bucket;
- struct lu_object_header *hdr;
- struct lu_site *site;
- struct hlist_node *scan;
- struct lu_object_header *found;
- struct cl_object *clob;
- unsigned depth;
-
- LASSERT(lu_device_is_cl(dev));
-
- site = dev->ld_site;
- bucket = site->ls_hash + (id->vpi_bucket & site->ls_hash_mask);
- depth = id->vpi_depth & 0xf;
- found = NULL;
- clob = NULL;
-
- /* XXX copy of lu_object.c:htable_lookup() */
- read_lock(&site->ls_guard);
- hlist_for_each_entry(hdr, scan, bucket, loh_hash) {
- if (depth-- == 0) {
- if (!lu_object_is_dying(hdr)) {
- if (atomic_add_return(1, &hdr->loh_ref) == 1)
- ++ site->ls_busy;
- found = hdr;
- }
- break;
- }
- }
- read_unlock(&site->ls_guard);
-
- if (found != NULL) {
- struct lu_object *lu_obj;
-
- lu_obj = lu_object_locate(found, dev->ld_type);
- if (lu_obj != NULL) {
- lu_object_ref_add(lu_obj, "dump", cfs_current());
- clob = lu2cl(lu_obj);
- } else
- lu_object_put(env, lu_object_top(found));
- } else if (depth > 0)
- id->vpi_depth = 0xf;
- return clob;
-}
-
-static loff_t vvp_pgcache_find(const struct lu_env *env,
- struct lu_device *dev, loff_t pos)
+static struct page *vvp_pgcache_current(struct vvp_seq_private *priv)
{
- struct cl_object *clob;
- struct lu_site *site;
- struct vvp_pgcache_id id;
-
- site = dev->ld_site;
- vvp_pgcache_id_unpack(pos, &id);
-
- while (1) {
- if (id.vpi_bucket >= site->ls_hash_size)
- return ~0ULL;
- clob = vvp_pgcache_obj(env, dev, &id);
- if (clob != NULL) {
- struct cl_object_header *hdr;
- int nr;
- struct cl_page *pg;
-
- /* got an object. Find next page. */
- hdr = cl_object_header(clob);
-
- spin_lock(&hdr->coh_page_guard);
- nr = radix_tree_gang_lookup(&hdr->coh_tree,
- (void **)&pg,
- id.vpi_index, 1);
- if (nr > 0) {
- id.vpi_index = pg->cp_index;
- /* Cant support over 16T file */
- nr = !(pg->cp_index > 0xffffffff);
- }
- spin_unlock(&hdr->coh_page_guard);
-
- lu_object_ref_del(&clob->co_lu, "dump", cfs_current());
- cl_object_put(env, clob);
- if (nr > 0)
- return vvp_pgcache_id_pack(&id);
- }
- /* to the next object. */
- ++id.vpi_depth;
- id.vpi_depth &= 0xf;
- if (id.vpi_depth == 0 && ++id.vpi_bucket == 0)
- return ~0ULL;
- id.vpi_index = 0;
- }
+ struct lu_device *dev = &priv->vsp_sbi->ll_cl->cd_lu_dev;
+ struct lu_object_header *h;
+ struct page *vmpage = NULL;
+
+ rhashtable_walk_start(&priv->vsp_iter);
+ while ((h = rhashtable_walk_next(&priv->vsp_iter)) != NULL) {
+ struct inode *inode;
+ int nr;
+
+ if (!priv->vsp_clob) {
+ struct lu_object *lu_obj;
+
+ lu_obj = lu_object_get_first(h, dev);
+ if (!lu_obj)
+ continue;
+
+ priv->vsp_clob = lu2cl(lu_obj);
+ lu_object_ref_add(lu_obj, "dump", current);
+ priv->vsp_page_index = 0;
+ }
+
+ inode = vvp_object_inode(priv->vsp_clob);
+ nr = find_get_pages_contig(inode->i_mapping,
+ priv->vsp_page_index, 1, &vmpage);
+ if (nr > 0) {
+ priv->vsp_page_index = vmpage->index;
+ break;
+ }
+ lu_object_ref_del(&priv->vsp_clob->co_lu, "dump", current);
+ cl_object_put(priv->vsp_env, priv->vsp_clob);
+ priv->vsp_clob = NULL;
+ priv->vsp_page_index = 0;
+ }
+ rhashtable_walk_stop(&priv->vsp_iter);
+ return vmpage;
}
#define seq_page_flag(seq, page, flag, has_flags) do { \
- if (test_bit(PG_##flag, &(page)->flags)) { \
+ if (test_bit(PG_##flag, &(page)->flags)) { \
seq_printf(seq, "%s"#flag, has_flags ? "|" : ""); \
has_flags = 1; \
} \
} while(0)
static void vvp_pgcache_page_show(const struct lu_env *env,
- struct seq_file *seq, struct cl_page *page)
+ struct seq_file *seq, struct cl_page *page)
{
- struct ccc_page *cpg;
- cfs_page_t *vmpage;
- int has_flags;
-
- cpg = cl2ccc_page(cl_page_at(page, &vvp_device_type));
- vmpage = cpg->cpg_page;
- seq_printf(seq," %5i | %p %p %s %s %s %s | %p %lu/%u(%p) %lu %u [",
- 0 /* gen */,
- cpg, page,
- "none",
- cpg->cpg_write_queued ? "wq" : "- ",
- cpg->cpg_defer_uptodate ? "du" : "- ",
- PageWriteback(vmpage) ? "wb" : "-",
- vmpage, vmpage->mapping->host->i_ino,
- vmpage->mapping->host->i_generation,
- vmpage->mapping->host, vmpage->index,
- page_count(vmpage));
- has_flags = 0;
- seq_page_flag(seq, vmpage, locked, has_flags);
- seq_page_flag(seq, vmpage, error, has_flags);
- seq_page_flag(seq, vmpage, referenced, has_flags);
- seq_page_flag(seq, vmpage, uptodate, has_flags);
- seq_page_flag(seq, vmpage, dirty, has_flags);
-#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,12))
- seq_page_flag(seq, vmpage, highmem, has_flags);
-#endif
- seq_page_flag(seq, vmpage, writeback, has_flags);
- seq_printf(seq, "%s]\n", has_flags ? "" : "-");
+ struct vvp_page *vpg;
+ struct page *vmpage;
+ int has_flags;
+
+ vpg = cl2vvp_page(cl_page_at(page, &vvp_device_type));
+ vmpage = vpg->vpg_page;
+ seq_printf(seq, " %5i | %p %p %s %s %s | %p "DFID"(%p) %lu %u [",
+ 0 /* gen */,
+ vpg, page,
+ "none",
+ vpg->vpg_defer_uptodate ? "du" : "- ",
+ PageWriteback(vmpage) ? "wb" : "-",
+ vmpage,
+ PFID(ll_inode2fid(vmpage->mapping->host)),
+ vmpage->mapping->host, vmpage->index,
+ page_count(vmpage));
+ has_flags = 0;
+ seq_page_flag(seq, vmpage, locked, has_flags);
+ seq_page_flag(seq, vmpage, error, has_flags);
+ seq_page_flag(seq, vmpage, referenced, has_flags);
+ seq_page_flag(seq, vmpage, uptodate, has_flags);
+ seq_page_flag(seq, vmpage, dirty, has_flags);
+ seq_page_flag(seq, vmpage, writeback, has_flags);
+ seq_printf(seq, "%s]\n", has_flags ? "" : "-");
}
static int vvp_pgcache_show(struct seq_file *f, void *v)
{
- loff_t pos;
- struct ll_sb_info *sbi;
- struct cl_object *clob;
- struct lu_env *env;
- struct cl_page *page;
- struct cl_object_header *hdr;
- struct vvp_pgcache_id id;
- int refcheck;
- int result;
-
- env = cl_env_get(&refcheck);
- if (!IS_ERR(env)) {
- pos = *(loff_t *) v;
- vvp_pgcache_id_unpack(pos, &id);
- sbi = f->private;
- clob = vvp_pgcache_obj(env, &sbi->ll_cl->cd_lu_dev, &id);
- if (clob != NULL) {
- hdr = cl_object_header(clob);
-
- spin_lock(&hdr->coh_page_guard);
- page = cl_page_lookup(hdr, id.vpi_index);
- spin_unlock(&hdr->coh_page_guard);
-
- seq_printf(f, "%8x@"DFID": ",
- id.vpi_index, PFID(&hdr->coh_lu.loh_fid));
- if (page != NULL) {
- vvp_pgcache_page_show(env, f, page);
- cl_page_put(env, page);
- } else
- seq_puts(f, "missing\n");
- lu_object_ref_del(&clob->co_lu, "dump", cfs_current());
- cl_object_put(env, clob);
- } else
- seq_printf(f, "%llx missing\n", pos);
- cl_env_put(env, &refcheck);
- result = 0;
- } else
- result = PTR_ERR(env);
- return result;
+ struct vvp_seq_private *priv = f->private;
+ struct page *vmpage = v;
+ struct cl_page *page;
+
+ seq_printf(f, "%8lx@" DFID ": ", vmpage->index,
+ PFID(lu_object_fid(&priv->vsp_clob->co_lu)));
+ lock_page(vmpage);
+ page = cl_vmpage_page(vmpage, priv->vsp_clob);
+ unlock_page(vmpage);
+ put_page(vmpage);
+
+ if (page) {
+ vvp_pgcache_page_show(priv->vsp_env, f, page);
+ cl_page_put(priv->vsp_env, page);
+ } else {
+ seq_puts(f, "missing\n");
+ }
+
+ return 0;
}
-static void *vvp_pgcache_start(struct seq_file *f, loff_t *pos)
+static void vvp_pgcache_rewind(struct vvp_seq_private *priv)
{
- struct ll_sb_info *sbi;
- struct lu_env *env;
- int refcheck;
+ if (priv->vvp_prev_pos) {
+ struct lu_site *s = priv->vsp_sbi->ll_cl->cd_lu_dev.ld_site;
+
+ rhashtable_walk_exit(&priv->vsp_iter);
+ rhashtable_walk_enter(&s->ls_obj_hash, &priv->vsp_iter);
+ priv->vvp_prev_pos = 0;
+ if (priv->vsp_clob) {
+ lu_object_ref_del(&priv->vsp_clob->co_lu, "dump",
+ current);
+ cl_object_put(priv->vsp_env, priv->vsp_clob);
+ }
+ priv->vsp_clob = NULL;
+ }
+}
- sbi = f->private;
+static struct page *vvp_pgcache_next_page(struct vvp_seq_private *priv)
+{
+ priv->vsp_page_index += 1;
+ return vvp_pgcache_current(priv);
+}
- env = cl_env_get(&refcheck);
- if (!IS_ERR(env)) {
- sbi = f->private;
- if (sbi->ll_site->ls_hash_bits > 64 - PGC_OBJ_SHIFT)
- pos = ERR_PTR(-EFBIG);
- else {
- *pos = vvp_pgcache_find(env, &sbi->ll_cl->cd_lu_dev,
- *pos);
- if (*pos == ~0ULL)
- pos = NULL;
- }
- cl_env_put(env, &refcheck);
- }
- return pos;
+static void *vvp_pgcache_start(struct seq_file *f, loff_t *pos)
+{
+ struct vvp_seq_private *priv = f->private;
+
+ if (*pos == 0) {
+ vvp_pgcache_rewind(priv);
+ } else if (*pos == priv->vvp_prev_pos) {
+ /* Return the current item */;
+ } else {
+ WARN_ON(*pos != priv->vvp_prev_pos + 1);
+ priv->vsp_page_index += 1;
+ }
+
+ priv->vvp_prev_pos = *pos;
+ return vvp_pgcache_current(priv);
}
static void *vvp_pgcache_next(struct seq_file *f, void *v, loff_t *pos)
{
- struct ll_sb_info *sbi;
- struct lu_env *env;
- int refcheck;
+ struct vvp_seq_private *priv = f->private;
- env = cl_env_get(&refcheck);
- if (!IS_ERR(env)) {
- sbi = f->private;
- *pos = vvp_pgcache_find(env, &sbi->ll_cl->cd_lu_dev, *pos + 1);
- if (*pos == ~0ULL)
- pos = NULL;
- cl_env_put(env, &refcheck);
- }
- return pos;
+ WARN_ON(*pos != priv->vvp_prev_pos);
+ *pos += 1;
+ priv->vvp_prev_pos = *pos;
+ return vvp_pgcache_next_page(priv);
}
static void vvp_pgcache_stop(struct seq_file *f, void *v)
static int vvp_dump_pgcache_seq_open(struct inode *inode, struct file *filp)
{
- struct proc_dir_entry *dp = PDE(inode);
- struct ll_sb_info *sbi = dp->data;
- struct seq_file *seq;
- int result;
-
- result = seq_open(filp, &vvp_pgcache_ops);
- if (result == 0) {
- seq = filp->private_data;
- seq->private = sbi;
- }
- return result;
+ struct vvp_seq_private *priv;
+ struct lu_site *s;
+
+ priv = __seq_open_private(filp, &vvp_pgcache_ops, sizeof(*priv));
+ if (!priv)
+ return -ENOMEM;
+
+ priv->vsp_sbi = inode->i_private;
+ priv->vsp_env = cl_env_get(&priv->vsp_refcheck);
+ priv->vsp_clob = NULL;
+ if (IS_ERR(priv->vsp_env)) {
+ int err = PTR_ERR(priv->vsp_env);
+
+ seq_release_private(inode, filp);
+ return err;
+ }
+
+ s = priv->vsp_sbi->ll_cl->cd_lu_dev.ld_site;
+ rhashtable_walk_enter(&s->ls_obj_hash, &priv->vsp_iter);
+
+ return 0;
+}
+
+static int vvp_dump_pgcache_seq_release(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq = file->private_data;
+ struct vvp_seq_private *priv = seq->private;
+
+ if (priv->vsp_clob) {
+ lu_object_ref_del(&priv->vsp_clob->co_lu, "dump", current);
+ cl_object_put(priv->vsp_env, priv->vsp_clob);
+ }
+ cl_env_put(priv->vsp_env, &priv->vsp_refcheck);
+ rhashtable_walk_exit(&priv->vsp_iter);
+ return seq_release_private(inode, file);
}
-struct file_operations vvp_dump_pgcache_file_ops = {
- .owner = THIS_MODULE,
- .open = vvp_dump_pgcache_seq_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
+const struct file_operations vvp_dump_pgcache_file_ops = {
+ .owner = THIS_MODULE,
+ .open = vvp_dump_pgcache_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = vvp_dump_pgcache_seq_release,
};
git://git.whamcloud.com / fs / lustre-release.git / blobdiff