+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
- * Copyright (C) 2002 Cluster File Systems, Inc.
- * Author: Liang Zhen <liangzhen@clusterfs.com>
- * Nikita Danilov <nikita@clusterfs.com>
- *
- * This file is part of Lustre, http://www.lustre.org.
- *
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
- *
- * Lustre is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Darwin porting library
- * Make things easy to port
- */
-#define DEBUG_SUBSYSTEM S_LNET
-
-#include <mach/mach_types.h>
-#include <string.h>
-#include <sys/malloc.h>
-
-#include <libcfs/libcfs.h>
-#include <libcfs/kp30.h>
-#include "darwin-internal.h"
-
-#if CFS_INDIVIDUAL_ZONE
-extern zone_t zinit( vm_size_t, vm_size_t, vm_size_t, const char *);
-extern void * zalloc(zone_t zone);
-extern void *zalloc_noblock(zone_t zone);
-extern void zfree(zone_t zone, void *addr);
-
-struct cfs_zone_nob {
- struct list_head *z_nob; /* Pointer to z_link */
- struct list_head z_link; /* Do NOT access it directly */
-};
-
-static struct cfs_zone_nob cfs_zone_nob;
-static spinlock_t cfs_zone_guard;
-
-cfs_mem_cache_t *mem_cache_find(const char *name, size_t objsize)
-{
- cfs_mem_cache_t *walker = NULL;
-
- LASSERT(cfs_zone_nob.z_nob != NULL);
-
- spin_lock(&cfs_zone_guard);
- list_for_each_entry(walker, cfs_zone_nob.z_nob, mc_link) {
- if (!strcmp(walker->mc_name, name) && \
- walker->mc_size == objsize)
- break;
- }
- spin_unlock(&cfs_zone_guard);
-
- return walker;
-}
-
-/*
- * our wrapper around kern/zalloc.c:zinit()
- *
- * Creates copy of name and calls zinit() to do real work. Needed because zone
- * survives kext unloading, so that @name cannot be just static string
- * embedded into kext image.
- */
-cfs_mem_cache_t *mem_cache_create(vm_size_t objsize, const char *name)
-{
- cfs_mem_cache_t *mc = NULL;
- char *cname;
-
- MALLOC(mc, cfs_mem_cache_t *, sizeof(cfs_mem_cache_t), M_TEMP, M_WAITOK|M_ZERO);
- if (mc == NULL){
- CERROR("cfs_mem_cache created fail!\n");
- return NULL;
- }
-
- cname = _MALLOC(strlen(name) + 1, M_TEMP, M_WAITOK);
- LASSERT(cname != NULL);
- mc->mc_cache = zinit(objsize, (KMEM_MAX_ZONE * objsize), 0, strcpy(cname, name));
- mc->mc_size = objsize;
- CFS_INIT_LIST_HEAD(&mc->mc_link);
- strncpy(mc->mc_name, name, 1 + strlen(name));
- return mc;
-}
-
-void mem_cache_destroy(cfs_mem_cache_t *mc)
-{
- /*
- * zone can NOT be destroyed after creating,
- * so just keep it in list.
- *
- * We will not lost a zone after we unload
- * libcfs, it can be found by from libcfs.zone
- */
- return;
-}
-
-#define mem_cache_alloc(mc) zalloc((mc)->mc_cache)
-#ifdef __DARWIN8__
-# define mem_cache_alloc_nb(mc) zalloc((mc)->mc_cache)
-#else
-/* XXX Liang: Tiger doesn't export zalloc_noblock() */
-# define mem_cache_alloc_nb(mc) zalloc_noblock((mc)->mc_cache)
-#endif
-#define mem_cache_free(mc, p) zfree((mc)->mc_cache, p)
-
-#else /* !CFS_INDIVIDUAL_ZONE */
-
-cfs_mem_cache_t *
-mem_cache_find(const char *name, size_t objsize)
-{
- return NULL;
-}
-
-cfs_mem_cache_t *mem_cache_create(vm_size_t size, const char *name)
-{
- cfs_mem_cache_t *mc = NULL;
-
- MALLOC(mc, cfs_mem_cache_t *, sizeof(cfs_mem_cache_t), M_TEMP, M_WAITOK|M_ZERO);
- if (mc == NULL){
- CERROR("cfs_mem_cache created fail!\n");
- return NULL;
- }
- mc->mc_cache = OSMalloc_Tagalloc(name, OSMT_DEFAULT);
- mc->mc_size = size;
- return mc;
-}
-
-void mem_cache_destroy(cfs_mem_cache_t *mc)
-{
- OSMalloc_Tagfree(mc->mc_cache);
- FREE(mc, M_TEMP);
-}
-
-#define mem_cache_alloc(mc) OSMalloc((mc)->mc_size, (mc)->mc_cache)
-#define mem_cache_alloc_nb(mc) OSMalloc_noblock((mc)->mc_size, (mc)->mc_cache)
-#define mem_cache_free(mc, p) OSFree(p, (mc)->mc_size, (mc)->mc_cache)
-
-#endif /* !CFS_INDIVIDUAL_ZONE */
-
-cfs_mem_cache_t *
-cfs_mem_cache_create (const char *name,
- size_t objsize, size_t off, unsigned long arg1)
-{
- cfs_mem_cache_t *mc;
-
- mc = mem_cache_find(name, objsize);
- if (mc)
- return mc;
- mc = mem_cache_create(objsize, name);
- return mc;
-}
-
-int cfs_mem_cache_destroy (cfs_mem_cache_t *cachep)
-{
- mem_cache_destroy(cachep);
- return 0;
-}
-
-void *cfs_mem_cache_alloc (cfs_mem_cache_t *cachep, int flags)
-{
- void *result;
-
- /* zalloc_canblock() is not exported... Emulate it. */
- if (flags & CFS_ALLOC_ATOMIC) {
- result = (void *)mem_cache_alloc_nb(cachep);
- } else {
- LASSERT(get_preemption_level() == 0);
- result = (void *)mem_cache_alloc(cachep);
- }
- if (result != NULL && (flags & CFS_ALLOC_ZERO))
- memset(result, 0, cachep->mc_size);
-
- return result;
-}
-
-void cfs_mem_cache_free (cfs_mem_cache_t *cachep, void *objp)
-{
- mem_cache_free(cachep, objp);
-}
-
-/* ---------------------------------------------------------------------------
- * Page operations
- *
- * --------------------------------------------------------------------------- */
-
-/*
- * "Raw" pages
- */
-
-static unsigned int raw_pages = 0;
-static cfs_mem_cache_t *raw_page_cache = NULL;
-
-static struct xnu_page_ops raw_page_ops;
-static struct xnu_page_ops *page_ops[XNU_PAGE_NTYPES] = {
- [XNU_PAGE_RAW] = &raw_page_ops
-};
-
-#if defined(LIBCFS_DEBUG)
-static int page_type_is_valid(cfs_page_t *page)
-{
- LASSERT(page != NULL);
- return 0 <= page->type && page->type < XNU_PAGE_NTYPES;
-}
-
-static int page_is_raw(cfs_page_t *page)
-{
- return page->type == XNU_PAGE_RAW;
-}
-#endif
-
-static struct xnu_raw_page *as_raw(cfs_page_t *page)
-{
- LASSERT(page_is_raw(page));
- return list_entry(page, struct xnu_raw_page, header);
-}
-
-static void *raw_page_address(cfs_page_t *pg)
-{
- return (void *)as_raw(pg)->virtual;
-}
-
-static void *raw_page_map(cfs_page_t *pg)
-{
- return (void *)as_raw(pg)->virtual;
-}
-
-static void raw_page_unmap(cfs_page_t *pg)
-{
-}
-
-static struct xnu_page_ops raw_page_ops = {
- .page_map = raw_page_map,
- .page_unmap = raw_page_unmap,
- .page_address = raw_page_address
-};
-
-extern int get_preemption_level(void);
-
-struct list_head page_death_row;
-spinlock_t page_death_row_phylax;
-
-static void raw_page_finish(struct xnu_raw_page *pg)
-{
- -- raw_pages;
- if (pg->virtual != NULL)
- cfs_mem_cache_free(raw_page_cache, pg->virtual);
- cfs_free(pg);
-}
-
-void raw_page_death_row_clean(void)
-{
- struct xnu_raw_page *pg;
-
- spin_lock(&page_death_row_phylax);
- while (!list_empty(&page_death_row)) {
- pg = container_of(page_death_row.next,
- struct xnu_raw_page, link);
- list_del(&pg->link);
- spin_unlock(&page_death_row_phylax);
- raw_page_finish(pg);
- spin_lock(&page_death_row_phylax);
- }
- spin_unlock(&page_death_row_phylax);
-}
-
-/* Free a "page" */
-void free_raw_page(struct xnu_raw_page *pg)
-{
- if (!atomic_dec_and_test(&pg->count))
- return;
- /*
- * kmem_free()->vm_map_remove()->vm_map_delete()->lock_write() may
- * block. (raw_page_done()->upl_abort() can block too) On the other
- * hand, cfs_free_page() may be called in non-blockable context. To
- * work around this, park pages on global list when cannot block.
- */
- if (get_preemption_level() > 0) {
- spin_lock(&page_death_row_phylax);
- list_add(&pg->link, &page_death_row);
- spin_unlock(&page_death_row_phylax);
- } else {
- raw_page_finish(pg);
- raw_page_death_row_clean();
- }
-}
-
-cfs_page_t *cfs_alloc_page(u_int32_t flags)
-{
- struct xnu_raw_page *page;
-
- /*
- * XXX nikita: do NOT call libcfs_debug_msg() (CDEBUG/ENTRY/EXIT)
- * from here: this will lead to infinite recursion.
- */
-
- page = cfs_alloc(sizeof *page, flags);
- if (page != NULL) {
- page->virtual = cfs_mem_cache_alloc(raw_page_cache, flags);
- if (page->virtual != NULL) {
- ++ raw_pages;
- page->header.type = XNU_PAGE_RAW;
- atomic_set(&page->count, 1);
- } else {
- cfs_free(page);
- page = NULL;
- }
- }
- return page != NULL ? &page->header : NULL;
-}
-
-void cfs_free_page(cfs_page_t *pages)
-{
- free_raw_page(as_raw(pages));
-}
-
-void cfs_get_page(cfs_page_t *p)
-{
- atomic_inc(&as_raw(p)->count);
-}
-
-int cfs_put_page_testzero(cfs_page_t *p)
-{
- return atomic_dec_and_test(&as_raw(p)->count);
-}
-
-int cfs_page_count(cfs_page_t *p)
-{
- return atomic_read(&as_raw(p)->count);
-}
-
-/*
- * Generic page operations
- */
-
-void *cfs_page_address(cfs_page_t *pg)
-{
- /*
- * XXX nikita: do NOT call libcfs_debug_msg() (CDEBUG/ENTRY/EXIT)
- * from here: this will lead to infinite recursion.
- */
- LASSERT(page_type_is_valid(pg));
- return page_ops[pg->type]->page_address(pg);
-}
-
-void *cfs_kmap(cfs_page_t *pg)
-{
- LASSERT(page_type_is_valid(pg));
- return page_ops[pg->type]->page_map(pg);
-}
-
-void cfs_kunmap(cfs_page_t *pg)
-{
- LASSERT(page_type_is_valid(pg));
- return page_ops[pg->type]->page_unmap(pg);
-}
-
-void xnu_page_ops_register(int type, struct xnu_page_ops *ops)
-{
- LASSERT(0 <= type && type < XNU_PAGE_NTYPES);
- LASSERT(ops != NULL);
- LASSERT(page_ops[type] == NULL);
-
- page_ops[type] = ops;
-}
-
-void xnu_page_ops_unregister(int type)
-{
- LASSERT(0 <= type && type < XNU_PAGE_NTYPES);
- LASSERT(page_ops[type] != NULL);
-
- page_ops[type] = NULL;
-}
-
-/*
- * Portable memory allocator API
- */
-#ifdef HAVE_GET_PREEMPTION_LEVEL
-extern int get_preemption_level(void);
-#else
-#define get_preemption_level() (0)
-#endif
-
-void *cfs_alloc(size_t nr_bytes, u_int32_t flags)
-{
- int mflags;
-
- mflags = 0;
- if (flags & CFS_ALLOC_ATOMIC) {
- mflags |= M_NOWAIT;
- } else {
- LASSERT(get_preemption_level() == 0);
- mflags |= M_WAITOK;
- }
-
- if (flags & CFS_ALLOC_ZERO)
- mflags |= M_ZERO;
-
- return _MALLOC(nr_bytes, M_TEMP, mflags);
-}
-
-void cfs_free(void *addr)
-{
- return _FREE(addr, M_TEMP);
-}
-
-void *cfs_alloc_large(size_t nr_bytes)
-{
- LASSERT(get_preemption_level() == 0);
- return _MALLOC(nr_bytes, M_TEMP, M_WAITOK);
-}
-
-void cfs_free_large(void *addr)
-{
- LASSERT(get_preemption_level() == 0);
- return _FREE(addr, M_TEMP);
-}
-
-/*
- * Lookup cfs_zone_nob by sysctl.zone, if it cannot be
- * found (first load of * libcfs since boot), allocate
- * sysctl libcfs.zone.
- */
-int cfs_mem_init(void)
-{
-#if CFS_INDIVIDUAL_ZONE
- int rc;
- size_t len;
-
- len = sizeof(struct cfs_zone_nob);
- rc = sysctlbyname("libcfs.zone",
- (void *)&cfs_zone_nob, &len, NULL, 0);
- if (rc == ENOENT) {
- /* zone_nob is not register in libcfs_sysctl */
- struct cfs_zone_nob *nob;
- struct sysctl_oid *oid;
-
- assert(cfs_sysctl_isvalid());
-
- nob = _MALLOC(sizeof(struct cfs_zone_nob),
- M_TEMP, M_WAITOK | M_ZERO);
- CFS_INIT_LIST_HEAD(&nob->z_link);
- nob->z_nob = &nob->z_link;
- oid = cfs_alloc_sysctl_struct(NULL, OID_AUTO, CTLFLAG_RD | CTLFLAG_KERN,
- "zone", nob, sizeof(struct cfs_zone_nob));
- if (oid == NULL) {
- _FREE(nob, M_TEMP);
- return -ENOMEM;
- }
- sysctl_register_oid(oid);
-
- cfs_zone_nob.z_nob = nob->z_nob;
- }
- spin_lock_init(&cfs_zone_guard);
-#endif
- CFS_INIT_LIST_HEAD(&page_death_row);
- spin_lock_init(&page_death_row_phylax);
- raw_page_cache = cfs_mem_cache_create("raw-page", CFS_PAGE_SIZE, 0, 0);
- return 0;
-}
-
-void cfs_mem_fini(void)
-{
- raw_page_death_row_clean();
- spin_lock_done(&page_death_row_phylax);
- cfs_mem_cache_destroy(raw_page_cache);
-
-#if CFS_INDIVIDUAL_ZONE
- cfs_zone_nob.z_nob = NULL;
- spin_lock_done(&cfs_zone_guard);
-#endif
-}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff