diff options
Diffstat (limited to 'fs/jffs2/malloc.c')
| -rw-r--r-- | fs/jffs2/malloc.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/fs/jffs2/malloc.c b/fs/jffs2/malloc.c new file mode 100644 index 00000000000..5abb431c2a0 --- /dev/null +++ b/fs/jffs2/malloc.c @@ -0,0 +1,205 @@ +/* + * JFFS2 -- Journalling Flash File System, Version 2. + * + * Copyright (C) 2001-2003 Red Hat, Inc. + * + * Created by David Woodhouse <dwmw2@infradead.org> + * + * For licensing information, see the file 'LICENCE' in this directory. + * + * $Id: malloc.c,v 1.28 2004/11/16 20:36:11 dwmw2 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 + +// replace this by #define D3 (x) x for cache debugging +#define D3(x) + +/* 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; + +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) +{ + struct jffs2_full_dnode *ret = kmem_cache_alloc(full_dnode_slab, GFP_KERNEL); + D3 (printk (KERN_DEBUG "alloc_full_dnode at %p\n", ret)); + return ret; +} + +void jffs2_free_full_dnode(struct jffs2_full_dnode *x) +{ + D3 (printk (KERN_DEBUG "free full_dnode at %p\n", x)); + kmem_cache_free(full_dnode_slab, x); +} + +struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void) +{ + struct jffs2_raw_dirent *ret = kmem_cache_alloc(raw_dirent_slab, GFP_KERNEL); + D3 (printk (KERN_DEBUG "alloc_raw_dirent\n", ret)); + return ret; +} + +void jffs2_free_raw_dirent(struct jffs2_raw_dirent *x) +{ + D3 (printk (KERN_DEBUG "free_raw_dirent at %p\n", x)); + kmem_cache_free(raw_dirent_slab, x); +} + +struct jffs2_raw_inode *jffs2_alloc_raw_inode(void) +{ + struct jffs2_raw_inode *ret = kmem_cache_alloc(raw_inode_slab, GFP_KERNEL); + D3 (printk (KERN_DEBUG "alloc_raw_inode at %p\n", ret)); + return ret; +} + +void jffs2_free_raw_inode(struct jffs2_raw_inode *x) +{ + D3 (printk (KERN_DEBUG "free_raw_inode at %p\n", x)); + kmem_cache_free(raw_inode_slab, x); +} + +struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void) +{ + struct jffs2_tmp_dnode_info *ret = kmem_cache_alloc(tmp_dnode_info_slab, GFP_KERNEL); + D3 (printk (KERN_DEBUG "alloc_tmp_dnode_info at %p\n", ret)); + return ret; +} + +void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *x) +{ + D3 (printk (KERN_DEBUG "free_tmp_dnode_info at %p\n", x)); + kmem_cache_free(tmp_dnode_info_slab, x); +} + +struct jffs2_raw_node_ref *jffs2_alloc_raw_node_ref(void) +{ + struct jffs2_raw_node_ref *ret = kmem_cache_alloc(raw_node_ref_slab, GFP_KERNEL); + D3 (printk (KERN_DEBUG "alloc_raw_node_ref at %p\n", ret)); + return ret; +} + +void jffs2_free_raw_node_ref(struct jffs2_raw_node_ref *x) +{ + D3 (printk (KERN_DEBUG "free_raw_node_ref at %p\n", x)); + kmem_cache_free(raw_node_ref_slab, x); +} + +struct jffs2_node_frag *jffs2_alloc_node_frag(void) +{ + struct jffs2_node_frag *ret = kmem_cache_alloc(node_frag_slab, GFP_KERNEL); + D3 (printk (KERN_DEBUG "alloc_node_frag at %p\n", ret)); + return ret; +} + +void jffs2_free_node_frag(struct jffs2_node_frag *x) +{ + D3 (printk (KERN_DEBUG "free_node_frag at %p\n", 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); + D3 (printk(KERN_DEBUG "Allocated inocache at %p\n", ret)); + return ret; +} + +void jffs2_free_inode_cache(struct jffs2_inode_cache *x) +{ + D3 (printk(KERN_DEBUG "Freeing inocache at %p\n", x)); + kmem_cache_free(inode_cache_slab, x); +} + |