[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / jffs2 / malloc.c

/*
 * 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 1.31 2005/11/07 11:14:40 gleixner Exp $
 *
 */

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/jffs2.h>
#include "nodelist.h"

/* 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;
#ifdef CONFIG_JFFS2_FS_XATTR
static kmem_cache_t *xattr_datum_cache;
static kmem_cache_t *xattr_ref_cache;
#endif

int __init jffs2_create_slab_caches(void)
{
	full_dnode_slab = kmem_cache_create("jffs2_full_dnode",
					    sizeof(struct jffs2_full_dnode),
					    0, 0, NULL, NULL);
	if (!full_dnode_slab)
		goto err;

	raw_dirent_slab = kmem_cache_create("jffs2_raw_dirent",
					    sizeof(struct jffs2_raw_dirent),
					    0, 0, NULL, NULL);
	if (!raw_dirent_slab)
		goto err;

	raw_inode_slab = kmem_cache_create("jffs2_raw_inode",
					   sizeof(struct jffs2_raw_inode),
					   0, 0, 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, 0, 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, 0, NULL, NULL);
	if (!raw_node_ref_slab)
		goto err;

	node_frag_slab = kmem_cache_create("jffs2_node_frag",
					   sizeof(struct jffs2_node_frag),
					   0, 0, NULL, NULL);
	if (!node_frag_slab)
		goto err;

	inode_cache_slab = kmem_cache_create("jffs2_inode_cache",
					     sizeof(struct jffs2_inode_cache),
					     0, 0, NULL, NULL);
	if (!inode_cache_slab)
		goto err;

#ifdef CONFIG_JFFS2_FS_XATTR
	xattr_datum_cache = kmem_cache_create("jffs2_xattr_datum",
					     sizeof(struct jffs2_xattr_datum),
					     0, 0, NULL, NULL);
	if (!xattr_datum_cache)
		goto err;

	xattr_ref_cache = kmem_cache_create("jffs2_xattr_ref",
					   sizeof(struct jffs2_xattr_ref),
					   0, 0, NULL, NULL);
	if (!xattr_ref_cache)
		goto err;
#endif

	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);
#ifdef CONFIG_JFFS2_FS_XATTR
	if (xattr_datum_cache)
		kmem_cache_destroy(xattr_datum_cache);
	if (xattr_ref_cache)
		kmem_cache_destroy(xattr_ref_cache);
#endif
}

struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize)
{
	struct jffs2_full_dirent *ret;
	ret = kmalloc(sizeof(struct jffs2_full_dirent) + namesize, GFP_KERNEL);
	dbg_memalloc("%p\n", ret);
	return ret;
}

void jffs2_free_full_dirent(struct jffs2_full_dirent *x)
{
	dbg_memalloc("%p\n", x);
	kfree(x);
}

struct jffs2_full_dnode *jffs2_alloc_full_dnode(void)
{
	struct jffs2_full_dnode *ret;
	ret = kmem_cache_alloc(full_dnode_slab, GFP_KERNEL);
	dbg_memalloc("%p\n", ret);
	return ret;
}

void jffs2_free_full_dnode(struct jffs2_full_dnode *x)
{
	dbg_memalloc("%p\n", x);
	kmem_cache_free(full_dnode_slab, x);
}

struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void)
{
	struct jffs2_raw_dirent *ret;
	ret = kmem_cache_alloc(raw_dirent_slab, GFP_KERNEL);
	dbg_memalloc("%p\n", ret);
	return ret;
}

void jffs2_free_raw_dirent(struct jffs2_raw_dirent *x)
{
	dbg_memalloc("%p\n", x);
	kmem_cache_free(raw_dirent_slab, x);
}

struct jffs2_raw_inode *jffs2_alloc_raw_inode(void)
{
	struct jffs2_raw_inode *ret;
	ret = kmem_cache_alloc(raw_inode_slab, GFP_KERNEL);
	dbg_memalloc("%p\n", ret);
	return ret;
}

void jffs2_free_raw_inode(struct jffs2_raw_inode *x)
{
	dbg_memalloc("%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;
	ret = kmem_cache_alloc(tmp_dnode_info_slab, GFP_KERNEL);
	dbg_memalloc("%p\n",
		ret);
	return ret;
}

void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *x)
{
	dbg_memalloc("%p\n", x);
	kmem_cache_free(tmp_dnode_info_slab, x);
}

int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c,
				 struct jffs2_eraseblock *jeb, int nr)
{
	struct jffs2_raw_node_ref *p = c->refs;

	dbg_memalloc("%d\n", nr);

	while (nr && p) {
		p = p->next_in_ino;
		nr--;
	}
	while (nr) {
		p = __jffs2_alloc_raw_node_ref();
		if (!p)
			return -ENOMEM;
		p->next_in_ino = c->refs;
		c->refs = p;
		nr--;
	}
	c->reserved_refs = nr;
	return 0;
}

struct jffs2_raw_node_ref *__jffs2_alloc_raw_node_ref(void)
{
	struct jffs2_raw_node_ref *ret;
	ret = kmem_cache_alloc(raw_node_ref_slab, GFP_KERNEL);
	dbg_memalloc("%p\n", ret);
	return ret;
}

void __jffs2_free_raw_node_ref(struct jffs2_raw_node_ref *x)
{
	dbg_memalloc("%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;
	ret = kmem_cache_alloc(node_frag_slab, GFP_KERNEL);
	dbg_memalloc("%p\n", ret);
	return ret;
}

void jffs2_free_node_frag(struct jffs2_node_frag *x)
{
	dbg_memalloc("%p\n", x);
	kmem_cache_free(node_frag_slab, x);
}

struct jffs2_inode_cache *jffs2_alloc_inode_cache(void)
{
	struct jffs2_inode_cache *ret;
	ret = kmem_cache_alloc(inode_cache_slab, GFP_KERNEL);
	dbg_memalloc("%p\n", ret);
	return ret;
}

void jffs2_free_inode_cache(struct jffs2_inode_cache *x)
{
	dbg_memalloc("%p\n", x);
	kmem_cache_free(inode_cache_slab, x);
}

#ifdef CONFIG_JFFS2_FS_XATTR
struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void)
{
	struct jffs2_xattr_datum *xd;
	xd = kmem_cache_alloc(xattr_datum_cache, GFP_KERNEL);
	dbg_memalloc("%p\n", xd);

	memset(xd, 0, sizeof(struct jffs2_xattr_datum));
	xd->class = RAWNODE_CLASS_XATTR_DATUM;
	INIT_LIST_HEAD(&xd->xindex);
	return xd;
}

void jffs2_free_xattr_datum(struct jffs2_xattr_datum *xd)
{
	dbg_memalloc("%p\n", xd);
	kmem_cache_free(xattr_datum_cache, xd);
}

struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void)
{
	struct jffs2_xattr_ref *ref;
	ref = kmem_cache_alloc(xattr_ref_cache, GFP_KERNEL);
	dbg_memalloc("%p\n", ref);

	memset(ref, 0, sizeof(struct jffs2_xattr_ref));
	ref->class = RAWNODE_CLASS_XATTR_REF;
	return ref;
}

void jffs2_free_xattr_ref(struct jffs2_xattr_ref *ref)
{
	dbg_memalloc("%p\n", ref);
	kmem_cache_free(xattr_ref_cache, ref);
}
#endif
Commit	Line	Data
1da177e4 LT	1	/*
	2	* JFFS2 -- Journalling Flash File System, Version 2.
	3	*
	4	* Copyright (C) 2001-2003 Red Hat, Inc.
	5	*
	6	* Created by David Woodhouse <dwmw2@infradead.org>
	7	*
	8	* For licensing information, see the file 'LICENCE' in this directory.
	9	*
182ec4ee	10	* $Id: malloc.c,v 1.31 2005/11/07 11:14:40 gleixner Exp $
1da177e4 LT	11	*
	12	*/
	13
	14	#include <linux/kernel.h>
	15	#include <linux/slab.h>
	16	#include <linux/init.h>
	17	#include <linux/jffs2.h>
	18	#include "nodelist.h"
	19
1da177e4 LT	20	/* These are initialised to NULL in the kernel startup code.
	21	If you're porting to other operating systems, beware */
	22	static kmem_cache_t *full_dnode_slab;
	23	static kmem_cache_t *raw_dirent_slab;
	24	static kmem_cache_t *raw_inode_slab;
	25	static kmem_cache_t *tmp_dnode_info_slab;
	26	static kmem_cache_t *raw_node_ref_slab;
	27	static kmem_cache_t *node_frag_slab;
	28	static kmem_cache_t *inode_cache_slab;
aa98d7cf KK	29	#ifdef CONFIG_JFFS2_FS_XATTR
	30	static kmem_cache_t *xattr_datum_cache;
	31	static kmem_cache_t *xattr_ref_cache;
	32	#endif
1da177e4 LT	33
	34	int __init jffs2_create_slab_caches(void)
	35	{
182ec4ee	36	full_dnode_slab = kmem_cache_create("jffs2_full_dnode",
1da177e4	37	sizeof(struct jffs2_full_dnode),
f538c96b	38	0, 0, NULL, NULL);
1da177e4 LT	39	if (!full_dnode_slab)
	40	goto err;
	41
	42	raw_dirent_slab = kmem_cache_create("jffs2_raw_dirent",
	43	sizeof(struct jffs2_raw_dirent),
f538c96b	44	0, 0, NULL, NULL);
1da177e4 LT	45	if (!raw_dirent_slab)
	46	goto err;
	47
	48	raw_inode_slab = kmem_cache_create("jffs2_raw_inode",
	49	sizeof(struct jffs2_raw_inode),
f538c96b	50	0, 0, NULL, NULL);
1da177e4 LT	51	if (!raw_inode_slab)
	52	goto err;
	53
	54	tmp_dnode_info_slab = kmem_cache_create("jffs2_tmp_dnode",
	55	sizeof(struct jffs2_tmp_dnode_info),
f538c96b	56	0, 0, NULL, NULL);
1da177e4 LT	57	if (!tmp_dnode_info_slab)
	58	goto err;
	59
	60	raw_node_ref_slab = kmem_cache_create("jffs2_raw_node_ref",
	61	sizeof(struct jffs2_raw_node_ref),
f538c96b	62	0, 0, NULL, NULL);
1da177e4 LT	63	if (!raw_node_ref_slab)
	64	goto err;
	65
	66	node_frag_slab = kmem_cache_create("jffs2_node_frag",
	67	sizeof(struct jffs2_node_frag),
f538c96b	68	0, 0, NULL, NULL);
1da177e4 LT	69	if (!node_frag_slab)
	70	goto err;
	71
	72	inode_cache_slab = kmem_cache_create("jffs2_inode_cache",
	73	sizeof(struct jffs2_inode_cache),
f538c96b	74	0, 0, NULL, NULL);
aa98d7cf KK	75	if (!inode_cache_slab)
	76	goto err;
	77
	78	#ifdef CONFIG_JFFS2_FS_XATTR
	79	xattr_datum_cache = kmem_cache_create("jffs2_xattr_datum",
	80	sizeof(struct jffs2_xattr_datum),
	81	0, 0, NULL, NULL);
	82	if (!xattr_datum_cache)
	83	goto err;
	84
	85	xattr_ref_cache = kmem_cache_create("jffs2_xattr_ref",
	86	sizeof(struct jffs2_xattr_ref),
	87	0, 0, NULL, NULL);
	88	if (!xattr_ref_cache)
	89	goto err;
	90	#endif
	91
	92	return 0;
1da177e4 LT	93	err:
	94	jffs2_destroy_slab_caches();
	95	return -ENOMEM;
	96	}
	97
	98	void jffs2_destroy_slab_caches(void)
	99	{
	100	if(full_dnode_slab)
	101	kmem_cache_destroy(full_dnode_slab);
	102	if(raw_dirent_slab)
	103	kmem_cache_destroy(raw_dirent_slab);
	104	if(raw_inode_slab)
	105	kmem_cache_destroy(raw_inode_slab);
	106	if(tmp_dnode_info_slab)
	107	kmem_cache_destroy(tmp_dnode_info_slab);
	108	if(raw_node_ref_slab)
	109	kmem_cache_destroy(raw_node_ref_slab);
	110	if(node_frag_slab)
	111	kmem_cache_destroy(node_frag_slab);
	112	if(inode_cache_slab)
	113	kmem_cache_destroy(inode_cache_slab);
aa98d7cf KK	114	#ifdef CONFIG_JFFS2_FS_XATTR
	115	if (xattr_datum_cache)
	116	kmem_cache_destroy(xattr_datum_cache);
	117	if (xattr_ref_cache)
	118	kmem_cache_destroy(xattr_ref_cache);
	119	#endif
1da177e4 LT	120	}
	121
	122	struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize)
	123	{
f538c96b AB	124	struct jffs2_full_dirent *ret;
f538c96b AB	125	ret = kmalloc(sizeof(struct jffs2_full_dirent) + namesize, GFP_KERNEL);
733802d9	126	dbg_memalloc("%p\n", ret);
f538c96b	127	return ret;
1da177e4 LT	128	}
	129
	130	void jffs2_free_full_dirent(struct jffs2_full_dirent *x)
	131	{
733802d9	132	dbg_memalloc("%p\n", x);
1da177e4 LT	133	kfree(x);
	134	}
	135
	136	struct jffs2_full_dnode *jffs2_alloc_full_dnode(void)
	137	{
f538c96b AB	138	struct jffs2_full_dnode *ret;
f538c96b AB	139	ret = kmem_cache_alloc(full_dnode_slab, GFP_KERNEL);
733802d9	140	dbg_memalloc("%p\n", ret);
1da177e4 LT	141	return ret;
	142	}
	143
	144	void jffs2_free_full_dnode(struct jffs2_full_dnode *x)
	145	{
733802d9	146	dbg_memalloc("%p\n", x);
1da177e4 LT	147	kmem_cache_free(full_dnode_slab, x);
	148	}
	149
	150	struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void)
	151	{
f538c96b AB	152	struct jffs2_raw_dirent *ret;
f538c96b AB	153	ret = kmem_cache_alloc(raw_dirent_slab, GFP_KERNEL);
733802d9	154	dbg_memalloc("%p\n", ret);
1da177e4 LT	155	return ret;
	156	}
	157
	158	void jffs2_free_raw_dirent(struct jffs2_raw_dirent *x)
	159	{
733802d9	160	dbg_memalloc("%p\n", x);
1da177e4 LT	161	kmem_cache_free(raw_dirent_slab, x);
	162	}
	163
	164	struct jffs2_raw_inode *jffs2_alloc_raw_inode(void)
	165	{
f538c96b AB	166	struct jffs2_raw_inode *ret;
f538c96b AB	167	ret = kmem_cache_alloc(raw_inode_slab, GFP_KERNEL);
733802d9	168	dbg_memalloc("%p\n", ret);
1da177e4 LT	169	return ret;
	170	}
	171
	172	void jffs2_free_raw_inode(struct jffs2_raw_inode *x)
	173	{
733802d9	174	dbg_memalloc("%p\n", x);
1da177e4 LT	175	kmem_cache_free(raw_inode_slab, x);
	176	}
	177
	178	struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void)
	179	{
f538c96b AB	180	struct jffs2_tmp_dnode_info *ret;
f538c96b AB	181	ret = kmem_cache_alloc(tmp_dnode_info_slab, GFP_KERNEL);
733802d9	182	dbg_memalloc("%p\n",
f538c96b	183	ret);
1da177e4 LT	184	return ret;
	185	}
	186
	187	void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *x)
	188	{
733802d9	189	dbg_memalloc("%p\n", x);
1da177e4 LT	190	kmem_cache_free(tmp_dnode_info_slab, x);
	191	}
	192
046b8b98 DW	193	int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c,
046b8b98 DW	194	struct jffs2_eraseblock *jeb, int nr)
2f785402 DW	195	{
	196	struct jffs2_raw_node_ref *p = c->refs;
	197
	198	dbg_memalloc("%d\n", nr);
	199
	200	while (nr && p) {
	201	p = p->next_in_ino;
	202	nr--;
	203	}
	204	while (nr) {
	205	p = __jffs2_alloc_raw_node_ref();
	206	if (!p)
	207	return -ENOMEM;
	208	p->next_in_ino = c->refs;
	209	c->refs = p;
	210	nr--;
	211	}
	212	c->reserved_refs = nr;
	213	return 0;
	214	}
	215
	216	struct jffs2_raw_node_ref *__jffs2_alloc_raw_node_ref(void)
1da177e4	217	{
f538c96b AB	218	struct jffs2_raw_node_ref *ret;
f538c96b AB	219	ret = kmem_cache_alloc(raw_node_ref_slab, GFP_KERNEL);
733802d9	220	dbg_memalloc("%p\n", ret);
1da177e4 LT	221	return ret;
	222	}
	223
2f785402	224	void __jffs2_free_raw_node_ref(struct jffs2_raw_node_ref *x)
1da177e4	225	{
733802d9	226	dbg_memalloc("%p\n", x);
1da177e4 LT	227	kmem_cache_free(raw_node_ref_slab, x);
	228	}
	229
	230	struct jffs2_node_frag *jffs2_alloc_node_frag(void)
	231	{
f538c96b AB	232	struct jffs2_node_frag *ret;
f538c96b AB	233	ret = kmem_cache_alloc(node_frag_slab, GFP_KERNEL);
733802d9	234	dbg_memalloc("%p\n", ret);
1da177e4 LT	235	return ret;
	236	}
	237
	238	void jffs2_free_node_frag(struct jffs2_node_frag *x)
	239	{
733802d9	240	dbg_memalloc("%p\n", x);
1da177e4 LT	241	kmem_cache_free(node_frag_slab, x);
	242	}
	243
	244	struct jffs2_inode_cache *jffs2_alloc_inode_cache(void)
	245	{
f538c96b AB	246	struct jffs2_inode_cache *ret;
f538c96b AB	247	ret = kmem_cache_alloc(inode_cache_slab, GFP_KERNEL);
733802d9	248	dbg_memalloc("%p\n", ret);
1da177e4 LT	249	return ret;
	250	}
	251
	252	void jffs2_free_inode_cache(struct jffs2_inode_cache *x)
	253	{
733802d9	254	dbg_memalloc("%p\n", x);
1da177e4 LT	255	kmem_cache_free(inode_cache_slab, x);
1da177e4 LT	256	}
aa98d7cf KK	257
	258	#ifdef CONFIG_JFFS2_FS_XATTR
	259	struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void)
	260	{
	261	struct jffs2_xattr_datum *xd;
	262	xd = kmem_cache_alloc(xattr_datum_cache, GFP_KERNEL);
	263	dbg_memalloc("%p\n", xd);
	264
	265	memset(xd, 0, sizeof(struct jffs2_xattr_datum));
	266	xd->class = RAWNODE_CLASS_XATTR_DATUM;
	267	INIT_LIST_HEAD(&xd->xindex);
	268	return xd;
	269	}
	270
	271	void jffs2_free_xattr_datum(struct jffs2_xattr_datum *xd)
	272	{
	273	dbg_memalloc("%p\n", xd);
	274	kmem_cache_free(xattr_datum_cache, xd);
	275	}
	276
	277	struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void)
	278	{
	279	struct jffs2_xattr_ref *ref;
	280	ref = kmem_cache_alloc(xattr_ref_cache, GFP_KERNEL);
	281	dbg_memalloc("%p\n", ref);
	282
	283	memset(ref, 0, sizeof(struct jffs2_xattr_ref));
	284	ref->class = RAWNODE_CLASS_XATTR_REF;
aa98d7cf KK	285	return ref;
	286	}
	287
	288	void jffs2_free_xattr_ref(struct jffs2_xattr_ref *ref)
	289	{
	290	dbg_memalloc("%p\n", ref);
	291	kmem_cache_free(xattr_ref_cache, ref);
	292	}
	293	#endif