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Diffstat (limited to 'fs/jffs2/malloc.c')
-rw-r--r--fs/jffs2/malloc.c114
1 files changed, 84 insertions, 30 deletions
diff --git a/fs/jffs2/malloc.c b/fs/jffs2/malloc.c
index f2473fa2fd1..b8fd651307a 100644
--- a/fs/jffs2/malloc.c
+++ b/fs/jffs2/malloc.c
@@ -1,16 +1,16 @@
/*
* JFFS2 -- Journalling Flash File System, Version 2.
*
- * Copyright (C) 2001-2003 Red Hat, Inc.
+ * Copyright © 2001-2007 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 $
- *
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
@@ -19,72 +19,72 @@
/* 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;
+static struct kmem_cache *full_dnode_slab;
+static struct kmem_cache *raw_dirent_slab;
+static struct kmem_cache *raw_inode_slab;
+static struct kmem_cache *tmp_dnode_info_slab;
+static struct kmem_cache *raw_node_ref_slab;
+static struct kmem_cache *node_frag_slab;
+static struct kmem_cache *inode_cache_slab;
#ifdef CONFIG_JFFS2_FS_XATTR
-static kmem_cache_t *xattr_datum_cache;
-static kmem_cache_t *xattr_ref_cache;
+static struct kmem_cache *xattr_datum_cache;
+static struct kmem_cache *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);
+ 0, 0, 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);
+ 0, SLAB_HWCACHE_ALIGN, 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);
+ 0, SLAB_HWCACHE_ALIGN, 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);
+ 0, 0, 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);
+ raw_node_ref_slab = kmem_cache_create("jffs2_refblock",
+ sizeof(struct jffs2_raw_node_ref) * (REFS_PER_BLOCK + 1),
+ 0, 0, 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);
+ 0, 0, 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);
+ 0, 0, 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);
+ 0, 0, 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);
+ 0, 0, NULL);
if (!xattr_ref_cache)
goto err;
#endif
@@ -190,15 +190,65 @@ 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)
+static struct jffs2_raw_node_ref *jffs2_alloc_refblock(void)
{
struct jffs2_raw_node_ref *ret;
+
ret = kmem_cache_alloc(raw_node_ref_slab, GFP_KERNEL);
- dbg_memalloc("%p\n", ret);
+ if (ret) {
+ int i = 0;
+ for (i=0; i < REFS_PER_BLOCK; i++) {
+ ret[i].flash_offset = REF_EMPTY_NODE;
+ ret[i].next_in_ino = NULL;
+ }
+ ret[i].flash_offset = REF_LINK_NODE;
+ ret[i].next_in_ino = NULL;
+ }
return ret;
}
-void jffs2_free_raw_node_ref(struct jffs2_raw_node_ref *x)
+int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c,
+ struct jffs2_eraseblock *jeb, int nr)
+{
+ struct jffs2_raw_node_ref **p, *ref;
+ int i = nr;
+
+ dbg_memalloc("%d\n", nr);
+
+ p = &jeb->last_node;
+ ref = *p;
+
+ dbg_memalloc("Reserving %d refs for block @0x%08x\n", nr, jeb->offset);
+
+ /* If jeb->last_node is really a valid node then skip over it */
+ if (ref && ref->flash_offset != REF_EMPTY_NODE)
+ ref++;
+
+ while (i) {
+ if (!ref) {
+ dbg_memalloc("Allocating new refblock linked from %p\n", p);
+ ref = *p = jffs2_alloc_refblock();
+ if (!ref)
+ return -ENOMEM;
+ }
+ if (ref->flash_offset == REF_LINK_NODE) {
+ p = &ref->next_in_ino;
+ ref = *p;
+ continue;
+ }
+ i--;
+ ref++;
+ }
+ jeb->allocated_refs = nr;
+
+ dbg_memalloc("Reserved %d refs for block @0x%08x, last_node is %p (%08x,%p)\n",
+ nr, jeb->offset, jeb->last_node, jeb->last_node->flash_offset,
+ jeb->last_node->next_in_ino);
+
+ return 0;
+}
+
+void jffs2_free_refblock(struct jffs2_raw_node_ref *x)
{
dbg_memalloc("%p\n", x);
kmem_cache_free(raw_node_ref_slab, x);
@@ -236,11 +286,13 @@ void jffs2_free_inode_cache(struct jffs2_inode_cache *x)
struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void)
{
struct jffs2_xattr_datum *xd;
- xd = kmem_cache_alloc(xattr_datum_cache, GFP_KERNEL);
+ xd = kmem_cache_zalloc(xattr_datum_cache, GFP_KERNEL);
dbg_memalloc("%p\n", xd);
+ if (!xd)
+ return NULL;
- memset(xd, 0, sizeof(struct jffs2_xattr_datum));
xd->class = RAWNODE_CLASS_XATTR_DATUM;
+ xd->node = (void *)xd;
INIT_LIST_HEAD(&xd->xindex);
return xd;
}
@@ -254,11 +306,13 @@ void jffs2_free_xattr_datum(struct jffs2_xattr_datum *xd)
struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void)
{
struct jffs2_xattr_ref *ref;
- ref = kmem_cache_alloc(xattr_ref_cache, GFP_KERNEL);
+ ref = kmem_cache_zalloc(xattr_ref_cache, GFP_KERNEL);
dbg_memalloc("%p\n", ref);
+ if (!ref)
+ return NULL;
- memset(ref, 0, sizeof(struct jffs2_xattr_ref));
ref->class = RAWNODE_CLASS_XATTR_REF;
+ ref->node = (void *)ref;
return ref;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-10 05:13:16 +0000