11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * JFFS2 -- Journalling Flash File System, Version 2. 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (C) 2001-2003 Red Hat, Inc. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Created by David Woodhouse <dwmw2@infradead.org> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * For licensing information, see the file 'LICENCE' in this directory. 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds * $Id: malloc.c,v 1.28 2004/11/16 20:36:11 dwmw2 Exp $ 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds */ 131da177e4SLinus Torvalds 141da177e4SLinus Torvalds #include <linux/kernel.h> 151da177e4SLinus Torvalds #include <linux/slab.h> 161da177e4SLinus Torvalds #include <linux/init.h> 171da177e4SLinus Torvalds #include <linux/jffs2.h> 181da177e4SLinus Torvalds #include "nodelist.h" 191da177e4SLinus Torvalds 201da177e4SLinus Torvalds #if 0 211da177e4SLinus Torvalds #define JFFS2_SLAB_POISON SLAB_POISON 221da177e4SLinus Torvalds #else 231da177e4SLinus Torvalds #define JFFS2_SLAB_POISON 0 241da177e4SLinus Torvalds #endif 251da177e4SLinus Torvalds 261da177e4SLinus Torvalds // replace this by #define D3 (x) x for cache debugging 271da177e4SLinus Torvalds #define D3(x) 281da177e4SLinus Torvalds 291da177e4SLinus Torvalds /* These are initialised to NULL in the kernel startup code. 301da177e4SLinus Torvalds If you're porting to other operating systems, beware */ 311da177e4SLinus Torvalds static kmem_cache_t *full_dnode_slab; 321da177e4SLinus Torvalds static kmem_cache_t *raw_dirent_slab; 331da177e4SLinus Torvalds static kmem_cache_t *raw_inode_slab; 341da177e4SLinus Torvalds static kmem_cache_t *tmp_dnode_info_slab; 351da177e4SLinus Torvalds static kmem_cache_t *raw_node_ref_slab; 361da177e4SLinus Torvalds static kmem_cache_t *node_frag_slab; 371da177e4SLinus Torvalds static kmem_cache_t *inode_cache_slab; 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds int __init jffs2_create_slab_caches(void) 401da177e4SLinus Torvalds { 411da177e4SLinus Torvalds full_dnode_slab = kmem_cache_create("jffs2_full_dnode", 421da177e4SLinus Torvalds sizeof(struct jffs2_full_dnode), 431da177e4SLinus Torvalds 0, JFFS2_SLAB_POISON, NULL, NULL); 441da177e4SLinus Torvalds if (!full_dnode_slab) 451da177e4SLinus Torvalds goto err; 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds raw_dirent_slab = kmem_cache_create("jffs2_raw_dirent", 481da177e4SLinus Torvalds sizeof(struct jffs2_raw_dirent), 491da177e4SLinus Torvalds 0, JFFS2_SLAB_POISON, NULL, NULL); 501da177e4SLinus Torvalds if (!raw_dirent_slab) 511da177e4SLinus Torvalds goto err; 521da177e4SLinus Torvalds 531da177e4SLinus Torvalds raw_inode_slab = kmem_cache_create("jffs2_raw_inode", 541da177e4SLinus Torvalds sizeof(struct jffs2_raw_inode), 551da177e4SLinus Torvalds 0, JFFS2_SLAB_POISON, NULL, NULL); 561da177e4SLinus Torvalds if (!raw_inode_slab) 571da177e4SLinus Torvalds goto err; 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds tmp_dnode_info_slab = kmem_cache_create("jffs2_tmp_dnode", 601da177e4SLinus Torvalds sizeof(struct jffs2_tmp_dnode_info), 611da177e4SLinus Torvalds 0, JFFS2_SLAB_POISON, NULL, NULL); 621da177e4SLinus Torvalds if (!tmp_dnode_info_slab) 631da177e4SLinus Torvalds goto err; 641da177e4SLinus Torvalds 651da177e4SLinus Torvalds raw_node_ref_slab = kmem_cache_create("jffs2_raw_node_ref", 661da177e4SLinus Torvalds sizeof(struct jffs2_raw_node_ref), 671da177e4SLinus Torvalds 0, JFFS2_SLAB_POISON, NULL, NULL); 681da177e4SLinus Torvalds if (!raw_node_ref_slab) 691da177e4SLinus Torvalds goto err; 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds node_frag_slab = kmem_cache_create("jffs2_node_frag", 721da177e4SLinus Torvalds sizeof(struct jffs2_node_frag), 731da177e4SLinus Torvalds 0, JFFS2_SLAB_POISON, NULL, NULL); 741da177e4SLinus Torvalds if (!node_frag_slab) 751da177e4SLinus Torvalds goto err; 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds inode_cache_slab = kmem_cache_create("jffs2_inode_cache", 781da177e4SLinus Torvalds sizeof(struct jffs2_inode_cache), 791da177e4SLinus Torvalds 0, JFFS2_SLAB_POISON, NULL, NULL); 801da177e4SLinus Torvalds if (inode_cache_slab) 811da177e4SLinus Torvalds return 0; 821da177e4SLinus Torvalds err: 831da177e4SLinus Torvalds jffs2_destroy_slab_caches(); 841da177e4SLinus Torvalds return -ENOMEM; 851da177e4SLinus Torvalds } 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds void jffs2_destroy_slab_caches(void) 881da177e4SLinus Torvalds { 891da177e4SLinus Torvalds if(full_dnode_slab) 901da177e4SLinus Torvalds kmem_cache_destroy(full_dnode_slab); 911da177e4SLinus Torvalds if(raw_dirent_slab) 921da177e4SLinus Torvalds kmem_cache_destroy(raw_dirent_slab); 931da177e4SLinus Torvalds if(raw_inode_slab) 941da177e4SLinus Torvalds kmem_cache_destroy(raw_inode_slab); 951da177e4SLinus Torvalds if(tmp_dnode_info_slab) 961da177e4SLinus Torvalds kmem_cache_destroy(tmp_dnode_info_slab); 971da177e4SLinus Torvalds if(raw_node_ref_slab) 981da177e4SLinus Torvalds kmem_cache_destroy(raw_node_ref_slab); 991da177e4SLinus Torvalds if(node_frag_slab) 1001da177e4SLinus Torvalds kmem_cache_destroy(node_frag_slab); 1011da177e4SLinus Torvalds if(inode_cache_slab) 1021da177e4SLinus Torvalds kmem_cache_destroy(inode_cache_slab); 1031da177e4SLinus Torvalds } 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize) 1061da177e4SLinus Torvalds { 1071da177e4SLinus Torvalds return kmalloc(sizeof(struct jffs2_full_dirent) + namesize, GFP_KERNEL); 1081da177e4SLinus Torvalds } 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds void jffs2_free_full_dirent(struct jffs2_full_dirent *x) 1111da177e4SLinus Torvalds { 1121da177e4SLinus Torvalds kfree(x); 1131da177e4SLinus Torvalds } 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds struct jffs2_full_dnode *jffs2_alloc_full_dnode(void) 1161da177e4SLinus Torvalds { 1171da177e4SLinus Torvalds struct jffs2_full_dnode *ret = kmem_cache_alloc(full_dnode_slab, GFP_KERNEL); 1181da177e4SLinus Torvalds D3 (printk (KERN_DEBUG "alloc_full_dnode at %p\n", ret)); 1191da177e4SLinus Torvalds return ret; 1201da177e4SLinus Torvalds } 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds void jffs2_free_full_dnode(struct jffs2_full_dnode *x) 1231da177e4SLinus Torvalds { 1241da177e4SLinus Torvalds D3 (printk (KERN_DEBUG "free full_dnode at %p\n", x)); 1251da177e4SLinus Torvalds kmem_cache_free(full_dnode_slab, x); 1261da177e4SLinus Torvalds } 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void) 1291da177e4SLinus Torvalds { 1301da177e4SLinus Torvalds struct jffs2_raw_dirent *ret = kmem_cache_alloc(raw_dirent_slab, GFP_KERNEL); 1311da177e4SLinus Torvalds D3 (printk (KERN_DEBUG "alloc_raw_dirent\n", ret)); 1321da177e4SLinus Torvalds return ret; 1331da177e4SLinus Torvalds } 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds void jffs2_free_raw_dirent(struct jffs2_raw_dirent *x) 1361da177e4SLinus Torvalds { 1371da177e4SLinus Torvalds D3 (printk (KERN_DEBUG "free_raw_dirent at %p\n", x)); 1381da177e4SLinus Torvalds kmem_cache_free(raw_dirent_slab, x); 1391da177e4SLinus Torvalds } 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds struct jffs2_raw_inode *jffs2_alloc_raw_inode(void) 1421da177e4SLinus Torvalds { 1431da177e4SLinus Torvalds struct jffs2_raw_inode *ret = kmem_cache_alloc(raw_inode_slab, GFP_KERNEL); 1441da177e4SLinus Torvalds D3 (printk (KERN_DEBUG "alloc_raw_inode at %p\n", ret)); 1451da177e4SLinus Torvalds return ret; 1461da177e4SLinus Torvalds } 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds void jffs2_free_raw_inode(struct jffs2_raw_inode *x) 1491da177e4SLinus Torvalds { 1501da177e4SLinus Torvalds D3 (printk (KERN_DEBUG "free_raw_inode at %p\n", x)); 1511da177e4SLinus Torvalds kmem_cache_free(raw_inode_slab, x); 1521da177e4SLinus Torvalds } 1531da177e4SLinus Torvalds 1541da177e4SLinus Torvalds struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void) 1551da177e4SLinus Torvalds { 1561da177e4SLinus Torvalds struct jffs2_tmp_dnode_info *ret = kmem_cache_alloc(tmp_dnode_info_slab, GFP_KERNEL); 1571da177e4SLinus Torvalds D3 (printk (KERN_DEBUG "alloc_tmp_dnode_info at %p\n", ret)); 1581da177e4SLinus Torvalds return ret; 1591da177e4SLinus Torvalds } 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *x) 1621da177e4SLinus Torvalds { 1631da177e4SLinus Torvalds D3 (printk (KERN_DEBUG "free_tmp_dnode_info at %p\n", x)); 1641da177e4SLinus Torvalds kmem_cache_free(tmp_dnode_info_slab, x); 1651da177e4SLinus Torvalds } 1661da177e4SLinus Torvalds 1671da177e4SLinus Torvalds struct jffs2_raw_node_ref *jffs2_alloc_raw_node_ref(void) 1681da177e4SLinus Torvalds { 1691da177e4SLinus Torvalds struct jffs2_raw_node_ref *ret = kmem_cache_alloc(raw_node_ref_slab, GFP_KERNEL); 1701da177e4SLinus Torvalds D3 (printk (KERN_DEBUG "alloc_raw_node_ref at %p\n", ret)); 1711da177e4SLinus Torvalds return ret; 1721da177e4SLinus Torvalds } 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds void jffs2_free_raw_node_ref(struct jffs2_raw_node_ref *x) 1751da177e4SLinus Torvalds { 1761da177e4SLinus Torvalds D3 (printk (KERN_DEBUG "free_raw_node_ref at %p\n", x)); 1771da177e4SLinus Torvalds kmem_cache_free(raw_node_ref_slab, x); 1781da177e4SLinus Torvalds } 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds struct jffs2_node_frag *jffs2_alloc_node_frag(void) 1811da177e4SLinus Torvalds { 1821da177e4SLinus Torvalds struct jffs2_node_frag *ret = kmem_cache_alloc(node_frag_slab, GFP_KERNEL); 1831da177e4SLinus Torvalds D3 (printk (KERN_DEBUG "alloc_node_frag at %p\n", ret)); 1841da177e4SLinus Torvalds return ret; 1851da177e4SLinus Torvalds } 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds void jffs2_free_node_frag(struct jffs2_node_frag *x) 1881da177e4SLinus Torvalds { 1891da177e4SLinus Torvalds D3 (printk (KERN_DEBUG "free_node_frag at %p\n", x)); 1901da177e4SLinus Torvalds kmem_cache_free(node_frag_slab, x); 1911da177e4SLinus Torvalds } 1921da177e4SLinus Torvalds 1931da177e4SLinus Torvalds struct jffs2_inode_cache *jffs2_alloc_inode_cache(void) 1941da177e4SLinus Torvalds { 1951da177e4SLinus Torvalds struct jffs2_inode_cache *ret = kmem_cache_alloc(inode_cache_slab, GFP_KERNEL); 1961da177e4SLinus Torvalds D3 (printk(KERN_DEBUG "Allocated inocache at %p\n", ret)); 1971da177e4SLinus Torvalds return ret; 1981da177e4SLinus Torvalds } 1991da177e4SLinus Torvalds 2001da177e4SLinus Torvalds void jffs2_free_inode_cache(struct jffs2_inode_cache *x) 2011da177e4SLinus Torvalds { 2021da177e4SLinus Torvalds D3 (printk(KERN_DEBUG "Freeing inocache at %p\n", x)); 2031da177e4SLinus Torvalds kmem_cache_free(inode_cache_slab, x); 2041da177e4SLinus Torvalds } 2051da177e4SLinus Torvalds 206