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[/] [or1k/] [tags/] [LINUX_2_4_26_OR32/] [linux/] [linux-2.4/] [fs/] [jffs2/] [malloc.c] - Rev 1275
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/* * JFFS2 -- Journalling Flash File System, Version 2. * * Copyright (C) 2001 Red Hat, Inc. * * Created by David Woodhouse <dwmw2@cambridge.redhat.com> * * The original JFFS, from which the design for JFFS2 was derived, * was designed and implemented by Axis Communications AB. * * The contents of this file are subject to the Red Hat eCos Public * License Version 1.1 (the "Licence"); you may not use this file * except in compliance with the Licence. You may obtain a copy of * the Licence at http://www.redhat.com/ * * Software distributed under the Licence is distributed on an "AS IS" * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. * See the Licence for the specific language governing rights and * limitations under the Licence. * * The Original Code is JFFS2 - Journalling Flash File System, version 2 * * Alternatively, the contents of this file may be used under the * terms of the GNU General Public License version 2 (the "GPL"), in * which case the provisions of the GPL are applicable instead of the * above. If you wish to allow the use of your version of this file * only under the terms of the GPL and not to allow others to use your * version of this file under the RHEPL, indicate your decision by * deleting the provisions above and replace them with the notice and * other provisions required by the GPL. If you do not delete the * provisions above, a recipient may use your version of this file * under either the RHEPL or the GPL. * * $Id: malloc.c,v 1.1.1.1 2004-04-15 01:11:04 phoenix Exp $ * */ #include <linux/kernel.h> #include <linux/slab.h> #include <linux/init.h> #include <linux/jffs2.h> #include "nodelist.h" #if 0 #define JFFS2_SLAB_POISON SLAB_POISON #else #define JFFS2_SLAB_POISON 0 #endif /* These are initialised to NULL in the kernel startup code. If you're porting to other operating systems, beware */ static kmem_cache_t *full_dnode_slab; static kmem_cache_t *raw_dirent_slab; static kmem_cache_t *raw_inode_slab; static kmem_cache_t *tmp_dnode_info_slab; static kmem_cache_t *raw_node_ref_slab; static kmem_cache_t *node_frag_slab; static kmem_cache_t *inode_cache_slab; void jffs2_free_tmp_dnode_info_list(struct jffs2_tmp_dnode_info *tn) { struct jffs2_tmp_dnode_info *next; while (tn) { next = tn; tn = tn->next; jffs2_free_full_dnode(next->fn); jffs2_free_tmp_dnode_info(next); } } void jffs2_free_full_dirent_list(struct jffs2_full_dirent *fd) { struct jffs2_full_dirent *next; while (fd) { next = fd->next; jffs2_free_full_dirent(fd); fd = next; } } int __init jffs2_create_slab_caches(void) { full_dnode_slab = kmem_cache_create("jffs2_full_dnode", sizeof(struct jffs2_full_dnode), 0, JFFS2_SLAB_POISON, NULL, NULL); if (!full_dnode_slab) goto err; raw_dirent_slab = kmem_cache_create("jffs2_raw_dirent", sizeof(struct jffs2_raw_dirent), 0, JFFS2_SLAB_POISON, NULL, NULL); if (!raw_dirent_slab) goto err; raw_inode_slab = kmem_cache_create("jffs2_raw_inode", sizeof(struct jffs2_raw_inode), 0, JFFS2_SLAB_POISON, NULL, NULL); if (!raw_inode_slab) goto err; tmp_dnode_info_slab = kmem_cache_create("jffs2_tmp_dnode", sizeof(struct jffs2_tmp_dnode_info), 0, JFFS2_SLAB_POISON, NULL, NULL); if (!tmp_dnode_info_slab) goto err; raw_node_ref_slab = kmem_cache_create("jffs2_raw_node_ref", sizeof(struct jffs2_raw_node_ref), 0, JFFS2_SLAB_POISON, NULL, NULL); if (!raw_node_ref_slab) goto err; node_frag_slab = kmem_cache_create("jffs2_node_frag", sizeof(struct jffs2_node_frag), 0, JFFS2_SLAB_POISON, NULL, NULL); if (!node_frag_slab) goto err; inode_cache_slab = kmem_cache_create("jffs2_inode_cache", sizeof(struct jffs2_inode_cache), 0, JFFS2_SLAB_POISON, NULL, NULL); if (inode_cache_slab) return 0; err: jffs2_destroy_slab_caches(); return -ENOMEM; } void jffs2_destroy_slab_caches(void) { if(full_dnode_slab) kmem_cache_destroy(full_dnode_slab); if(raw_dirent_slab) kmem_cache_destroy(raw_dirent_slab); if(raw_inode_slab) kmem_cache_destroy(raw_inode_slab); if(tmp_dnode_info_slab) kmem_cache_destroy(tmp_dnode_info_slab); if(raw_node_ref_slab) kmem_cache_destroy(raw_node_ref_slab); if(node_frag_slab) kmem_cache_destroy(node_frag_slab); if(inode_cache_slab) kmem_cache_destroy(inode_cache_slab); } struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize) { return kmalloc(sizeof(struct jffs2_full_dirent) + namesize, GFP_KERNEL); } void jffs2_free_full_dirent(struct jffs2_full_dirent *x) { kfree(x); } struct jffs2_full_dnode *jffs2_alloc_full_dnode(void) { void *ret = kmem_cache_alloc(full_dnode_slab, GFP_KERNEL); return ret; } void jffs2_free_full_dnode(struct jffs2_full_dnode *x) { kmem_cache_free(full_dnode_slab, x); } struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void) { return kmem_cache_alloc(raw_dirent_slab, GFP_KERNEL); } void jffs2_free_raw_dirent(struct jffs2_raw_dirent *x) { kmem_cache_free(raw_dirent_slab, x); } struct jffs2_raw_inode *jffs2_alloc_raw_inode(void) { return kmem_cache_alloc(raw_inode_slab, GFP_KERNEL); } void jffs2_free_raw_inode(struct jffs2_raw_inode *x) { kmem_cache_free(raw_inode_slab, x); } struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void) { return kmem_cache_alloc(tmp_dnode_info_slab, GFP_KERNEL); } void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *x) { kmem_cache_free(tmp_dnode_info_slab, x); } struct jffs2_raw_node_ref *jffs2_alloc_raw_node_ref(void) { return kmem_cache_alloc(raw_node_ref_slab, GFP_KERNEL); } void jffs2_free_raw_node_ref(struct jffs2_raw_node_ref *x) { kmem_cache_free(raw_node_ref_slab, x); } struct jffs2_node_frag *jffs2_alloc_node_frag(void) { return kmem_cache_alloc(node_frag_slab, GFP_KERNEL); } void jffs2_free_node_frag(struct jffs2_node_frag *x) { kmem_cache_free(node_frag_slab, x); } struct jffs2_inode_cache *jffs2_alloc_inode_cache(void) { struct jffs2_inode_cache *ret = kmem_cache_alloc(inode_cache_slab, GFP_KERNEL); D1(printk(KERN_DEBUG "Allocated inocache at %p\n", ret)); return ret; } void jffs2_free_inode_cache(struct jffs2_inode_cache *x) { D1(printk(KERN_DEBUG "Freeing inocache at %p\n", x)); kmem_cache_free(inode_cache_slab, x); }
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