1 files changed, 0 insertions, 659 deletions

diff --git a/drivers/staging/lustre/lustre/llite/vvp_dev.c b/drivers/staging/lustre/lustre/llite/vvp_dev.c
deleted file mode 100644
index 987c03b058e6..000000000000
--- a/drivers/staging/lustre/lustre/llite/vvp_dev.c
+++ /dev/null
@@ -1,659 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * 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.gnu.org/licenses/gpl-2.0.html
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2012, 2015, Intel Corporation.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * 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
-
-#include <obd.h>
-#include "llite_internal.h"
-#include "vvp_internal.h"
-
-/*****************************************************************************
- *
- * Vvp device and device type functions.
- *
- */
-
-/*
- * vvp_ prefix stands for "Vfs Vm Posix". It corresponds to historical
- * "llite_" (var. "ll_") prefix.
- */
-
-static struct kmem_cache *ll_thread_kmem;
-struct kmem_cache *vvp_lock_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 = &ll_thread_kmem,
-		.ckd_name  = "ll_thread_kmem",
-		.ckd_size  = sizeof(struct ll_thread_info),
-	},
-	{
-		.ckd_cache = &vvp_lock_kmem,
-		.ckd_name  = "vvp_lock_kmem",
-		.ckd_size  = sizeof(struct vvp_lock),
-	},
-	{
-		.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 *ll_thread_key_init(const struct lu_context *ctx,
-				struct lu_context_key *key)
-{
-	struct vvp_thread_info *info;
-
-	info = kmem_cache_zalloc(ll_thread_kmem, GFP_NOFS);
-	if (!info)
-		info = ERR_PTR(-ENOMEM);
-	return info;
-}
-
-static void ll_thread_key_fini(const struct lu_context *ctx,
-			       struct lu_context_key *key, void *data)
-{
-	struct vvp_thread_info *info = data;
-
-	kmem_cache_free(ll_thread_kmem, info);
-}
-
-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 vvp_session *session;
-
-	session = kmem_cache_zalloc(vvp_session_kmem, GFP_NOFS);
-	if (!session)
-		session = ERR_PTR(-ENOMEM);
-	return session;
-}
-
-static void vvp_session_key_fini(const struct lu_context *ctx,
-				 struct lu_context_key *key, void *data)
-{
-	struct vvp_session *session = data;
-
-	kmem_cache_free(vvp_session_kmem, session);
-}
-
-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;
-
-	vti = kmem_cache_zalloc(vvp_thread_kmem, GFP_NOFS);
-	if (!vti)
-		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;
-
-	kmem_cache_free(vvp_thread_kmem, vti);
-}
-
-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, &vvp_thread_key, &ll_thread_key, &vvp_session_key);
-
-static const struct lu_device_operations vvp_lu_ops = {
-	.ldo_object_alloc      = vvp_object_alloc
-};
-
-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) {
-		cl_site_fini(site);
-		kfree(site);
-	}
-	cl_device_fini(lu2cl_dev(d));
-	kfree(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 vvp_device *vdv;
-	struct lu_device  *lud;
-	struct cl_site    *site;
-	int rc;
-
-	vdv = kzalloc(sizeof(*vdv), GFP_NOFS);
-	if (!vdv)
-		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;
-
-	site = kzalloc(sizeof(*site), GFP_NOFS);
-	if (site) {
-		rc = cl_site_init(site, &vdv->vdv_cl);
-		if (rc == 0) {
-			rc = lu_site_init_finish(&site->cs_lu);
-		} else {
-			LASSERT(!lud->ld_site);
-			CERROR("Cannot init lu_site, rc %d.\n", rc);
-			kfree(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;
-
-	vdv = lu2vvp_dev(d);
-	vdv->vdv_next = lu2cl_dev(next);
-
-	LASSERT(d->ld_site && next->ld_type);
-	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_init = vvp_type_init,
-	.ldto_fini = vvp_type_fini,
-
-	.ldto_start = vvp_type_start,
-	.ldto_stop  = vvp_type_stop,
-
-	.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_tags     = LU_DEVICE_CL,
-	.ldt_name     = LUSTRE_VVP_NAME,
-	.ldt_ops      = &vvp_device_type_ops,
-	.ldt_ctx_tags = LCT_CL_THREAD
-};
-
-/**
- * A mutex serializing calls to vvp_inode_fini() under extreme memory
- * pressure, when environments cannot be allocated.
- */
-int vvp_global_init(void)
-{
-	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;
-
-	return 0;
-
-out_kmem:
-	lu_kmem_fini(vvp_caches);
-
-	return rc;
-}
-
-void vvp_global_fini(void)
-{
-	lu_device_type_fini(&vvp_device_type);
-	lu_kmem_fini(vvp_caches);
-}
-
-/*****************************************************************************
- *
- * mirror obd-devices into cl devices.
- *
- */
-
-int cl_sb_init(struct super_block *sb)
-{
-	struct ll_sb_info *sbi;
-	struct cl_device  *cl;
-	struct lu_env     *env;
-	int rc = 0;
-	u16 refcheck;
-
-	sbi  = ll_s2sbi(sb);
-	env = cl_env_get(&refcheck);
-	if (!IS_ERR(env)) {
-		cl = cl_type_setup(env, NULL, &vvp_device_type,
-				   sbi->ll_dt_exp->exp_obd->obd_lu_dev);
-		if (!IS_ERR(cl)) {
-			sbi->ll_cl = cl;
-			sbi->ll_site = cl2lu_dev(cl)->ld_site;
-		}
-		cl_env_put(env, &refcheck);
-	} else {
-		rc = PTR_ERR(env);
-	}
-	return rc;
-}
-
-int cl_sb_fini(struct super_block *sb)
-{
-	struct ll_sb_info *sbi;
-	struct lu_env     *env;
-	struct cl_device  *cld;
-	u16 refcheck;
-	int		result;
-
-	sbi = ll_s2sbi(sb);
-	env = cl_env_get(&refcheck);
-	if (!IS_ERR(env)) {
-		cld = sbi->ll_cl;
-
-		if (cld) {
-			cl_stack_fini(env, cld);
-			sbi->ll_cl = NULL;
-			sbi->ll_site = NULL;
-		}
-		cl_env_put(env, &refcheck);
-		result = 0;
-	} else {
-		CERROR("Cannot cleanup cl-stack due to memory shortage.\n");
-		result = PTR_ERR(env);
-	}
-	return result;
-}
-
-/****************************************************************************
- *
- * 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 int		 vpi_bucket;
-	unsigned int		 vpi_depth;
-	u32			 vpi_index;
-
-	unsigned int		 vpi_curdep;
-	struct lu_object_header *vpi_obj;
-};
-
-static void vvp_pgcache_id_unpack(loff_t pos, struct vvp_pgcache_id *id)
-{
-	BUILD_BUG_ON(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 int vvp_pgcache_obj_get(struct cfs_hash *hs, struct cfs_hash_bd *bd,
-			       struct hlist_node *hnode, void *data)
-{
-	struct vvp_pgcache_id   *id  = data;
-	struct lu_object_header *hdr = cfs_hash_object(hs, hnode);
-
-	if (id->vpi_curdep-- > 0)
-		return 0; /* continue */
-
-	if (lu_object_is_dying(hdr))
-		return 1;
-
-	cfs_hash_get(hs, hnode);
-	id->vpi_obj = hdr;
-	return 1;
-}
-
-static struct cl_object *vvp_pgcache_obj(const struct lu_env *env,
-					 struct lu_device *dev,
-					 struct vvp_pgcache_id *id)
-{
-	LASSERT(lu_device_is_cl(dev));
-
-	id->vpi_depth &= 0xf;
-	id->vpi_obj    = NULL;
-	id->vpi_curdep = id->vpi_depth;
-
-	cfs_hash_hlist_for_each(dev->ld_site->ls_obj_hash, id->vpi_bucket,
-				vvp_pgcache_obj_get, id);
-	if (id->vpi_obj) {
-		struct lu_object *lu_obj;
-
-		lu_obj = lu_object_locate(id->vpi_obj, dev->ld_type);
-		if (lu_obj) {
-			lu_object_ref_add(lu_obj, "dump", current);
-			return lu2cl(lu_obj);
-		}
-		lu_object_put(env, lu_object_top(id->vpi_obj));
-
-	} else if (id->vpi_curdep > 0) {
-		id->vpi_depth = 0xf;
-	}
-	return NULL;
-}
-
-static loff_t vvp_pgcache_find(const struct lu_env *env,
-			       struct lu_device *dev, loff_t pos)
-{
-	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 >= CFS_HASH_NHLIST(site->ls_obj_hash))
-			return ~0ULL;
-		clob = vvp_pgcache_obj(env, dev, &id);
-		if (clob) {
-			struct inode *inode = vvp_object_inode(clob);
-			struct page *vmpage;
-			int nr;
-
-			nr = find_get_pages_contig(inode->i_mapping,
-						   id.vpi_index, 1, &vmpage);
-			if (nr > 0) {
-				id.vpi_index = vmpage->index;
-				/* Cant support over 16T file */
-				nr = !(vmpage->index > 0xffffffff);
-				put_page(vmpage);
-			}
-
-			lu_object_ref_del(&clob->co_lu, "dump", 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;
-	}
-}
-
-#define seq_page_flag(seq, page, flag, has_flags) do {		  \
-	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 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 vvp_pgcache_id    id;
-	u16 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) {
-			struct inode *inode = vvp_object_inode(clob);
-			struct cl_page *page = NULL;
-			struct page *vmpage;
-
-			result = find_get_pages_contig(inode->i_mapping,
-						       id.vpi_index, 1,
-						       &vmpage);
-			if (result > 0) {
-				lock_page(vmpage);
-				page = cl_vmpage_page(vmpage, clob);
-				unlock_page(vmpage);
-				put_page(vmpage);
-			}
-
-			seq_printf(f, "%8x@" DFID ": ", id.vpi_index,
-				   PFID(lu_object_fid(&clob->co_lu)));
-			if (page) {
-				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", 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;
-}
-
-static void *vvp_pgcache_start(struct seq_file *f, loff_t *pos)
-{
-	struct ll_sb_info *sbi;
-	struct lu_env     *env;
-	u16 refcheck;
-
-	sbi = f->private;
-
-	env = cl_env_get(&refcheck);
-	if (!IS_ERR(env)) {
-		sbi = f->private;
-		if (sbi->ll_site->ls_obj_hash->hs_cur_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_next(struct seq_file *f, void *v, loff_t *pos)
-{
-	struct ll_sb_info *sbi;
-	struct lu_env     *env;
-	u16 refcheck;
-
-	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;
-}
-
-static void vvp_pgcache_stop(struct seq_file *f, void *v)
-{
-	/* Nothing to do */
-}
-
-static const struct seq_operations vvp_pgcache_ops = {
-	.start = vvp_pgcache_start,
-	.next  = vvp_pgcache_next,
-	.stop  = vvp_pgcache_stop,
-	.show  = vvp_pgcache_show
-};
-
-static int vvp_dump_pgcache_seq_open(struct inode *inode, struct file *filp)
-{
-	struct seq_file *seq;
-	int rc;
-
-	rc = seq_open(filp, &vvp_pgcache_ops);
-	if (rc)
-		return rc;
-
-	seq = filp->private_data;
-	seq->private = inode->i_private;
-
-	return 0;
-}
-
-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 = seq_release,
-};