forked from luck/tmp_suning_uos_patched
aa98d7cf59
This attached patches provide xattr support including POSIX-ACL and SELinux support on JFFS2 (version.5). There are some significant differences from previous version posted at last December. The biggest change is addition of EBS(Erase Block Summary) support. Currently, both kernel and usermode utility (sumtool) can recognize xattr nodes which have JFFS2_NODETYPE_XATTR/_XREF nodetype. In addition, some bugs are fixed. - A potential race condition was fixed. - Unexpected fail when updating a xattr by same name/value pair was fixed. - A bug when removing xattr name/value pair was fixed. The fundamental structures (such as using two new nodetypes and exclusion mechanism by rwsem) are unchanged. But most of implementation were reviewed and updated if necessary. Espacially, we had to change several internal implementations related to load_xattr_datum() to avoid a potential race condition. [1/2] xattr_on_jffs2.kernel.version-5.patch [2/2] xattr_on_jffs2.utils.version-5.patch Signed-off-by: KaiGai Kohei <kaigai@ak.jp.nec.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
272 lines
6.5 KiB
C
272 lines
6.5 KiB
C
/*
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* JFFS2 -- Journalling Flash File System, Version 2.
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*
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* Copyright (C) 2001-2003 Red Hat, Inc.
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*
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* Created by David Woodhouse <dwmw2@infradead.org>
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*
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* For licensing information, see the file 'LICENCE' in this directory.
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*
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* $Id: malloc.c,v 1.31 2005/11/07 11:14:40 gleixner Exp $
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*
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/jffs2.h>
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#include "nodelist.h"
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/* These are initialised to NULL in the kernel startup code.
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If you're porting to other operating systems, beware */
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static kmem_cache_t *full_dnode_slab;
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static kmem_cache_t *raw_dirent_slab;
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static kmem_cache_t *raw_inode_slab;
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static kmem_cache_t *tmp_dnode_info_slab;
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static kmem_cache_t *raw_node_ref_slab;
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static kmem_cache_t *node_frag_slab;
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static kmem_cache_t *inode_cache_slab;
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#ifdef CONFIG_JFFS2_FS_XATTR
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static kmem_cache_t *xattr_datum_cache;
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static kmem_cache_t *xattr_ref_cache;
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#endif
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int __init jffs2_create_slab_caches(void)
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{
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full_dnode_slab = kmem_cache_create("jffs2_full_dnode",
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sizeof(struct jffs2_full_dnode),
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0, 0, NULL, NULL);
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if (!full_dnode_slab)
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goto err;
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raw_dirent_slab = kmem_cache_create("jffs2_raw_dirent",
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sizeof(struct jffs2_raw_dirent),
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0, 0, NULL, NULL);
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if (!raw_dirent_slab)
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goto err;
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raw_inode_slab = kmem_cache_create("jffs2_raw_inode",
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sizeof(struct jffs2_raw_inode),
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0, 0, NULL, NULL);
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if (!raw_inode_slab)
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goto err;
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tmp_dnode_info_slab = kmem_cache_create("jffs2_tmp_dnode",
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sizeof(struct jffs2_tmp_dnode_info),
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0, 0, NULL, NULL);
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if (!tmp_dnode_info_slab)
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goto err;
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raw_node_ref_slab = kmem_cache_create("jffs2_raw_node_ref",
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sizeof(struct jffs2_raw_node_ref),
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0, 0, NULL, NULL);
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if (!raw_node_ref_slab)
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goto err;
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node_frag_slab = kmem_cache_create("jffs2_node_frag",
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sizeof(struct jffs2_node_frag),
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0, 0, NULL, NULL);
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if (!node_frag_slab)
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goto err;
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inode_cache_slab = kmem_cache_create("jffs2_inode_cache",
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sizeof(struct jffs2_inode_cache),
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0, 0, NULL, NULL);
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if (!inode_cache_slab)
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goto err;
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#ifdef CONFIG_JFFS2_FS_XATTR
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xattr_datum_cache = kmem_cache_create("jffs2_xattr_datum",
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sizeof(struct jffs2_xattr_datum),
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0, 0, NULL, NULL);
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if (!xattr_datum_cache)
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goto err;
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xattr_ref_cache = kmem_cache_create("jffs2_xattr_ref",
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sizeof(struct jffs2_xattr_ref),
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0, 0, NULL, NULL);
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if (!xattr_ref_cache)
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goto err;
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#endif
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return 0;
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err:
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jffs2_destroy_slab_caches();
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return -ENOMEM;
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}
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void jffs2_destroy_slab_caches(void)
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{
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if(full_dnode_slab)
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kmem_cache_destroy(full_dnode_slab);
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if(raw_dirent_slab)
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kmem_cache_destroy(raw_dirent_slab);
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if(raw_inode_slab)
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kmem_cache_destroy(raw_inode_slab);
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if(tmp_dnode_info_slab)
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kmem_cache_destroy(tmp_dnode_info_slab);
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if(raw_node_ref_slab)
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kmem_cache_destroy(raw_node_ref_slab);
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if(node_frag_slab)
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kmem_cache_destroy(node_frag_slab);
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if(inode_cache_slab)
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kmem_cache_destroy(inode_cache_slab);
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#ifdef CONFIG_JFFS2_FS_XATTR
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if (xattr_datum_cache)
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kmem_cache_destroy(xattr_datum_cache);
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if (xattr_ref_cache)
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kmem_cache_destroy(xattr_ref_cache);
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#endif
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}
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struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize)
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{
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struct jffs2_full_dirent *ret;
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ret = kmalloc(sizeof(struct jffs2_full_dirent) + namesize, GFP_KERNEL);
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dbg_memalloc("%p\n", ret);
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return ret;
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}
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void jffs2_free_full_dirent(struct jffs2_full_dirent *x)
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{
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dbg_memalloc("%p\n", x);
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kfree(x);
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}
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struct jffs2_full_dnode *jffs2_alloc_full_dnode(void)
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{
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struct jffs2_full_dnode *ret;
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ret = kmem_cache_alloc(full_dnode_slab, GFP_KERNEL);
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dbg_memalloc("%p\n", ret);
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return ret;
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}
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void jffs2_free_full_dnode(struct jffs2_full_dnode *x)
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{
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dbg_memalloc("%p\n", x);
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kmem_cache_free(full_dnode_slab, x);
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}
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struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void)
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{
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struct jffs2_raw_dirent *ret;
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ret = kmem_cache_alloc(raw_dirent_slab, GFP_KERNEL);
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dbg_memalloc("%p\n", ret);
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return ret;
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}
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void jffs2_free_raw_dirent(struct jffs2_raw_dirent *x)
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{
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dbg_memalloc("%p\n", x);
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kmem_cache_free(raw_dirent_slab, x);
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}
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struct jffs2_raw_inode *jffs2_alloc_raw_inode(void)
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{
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struct jffs2_raw_inode *ret;
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ret = kmem_cache_alloc(raw_inode_slab, GFP_KERNEL);
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dbg_memalloc("%p\n", ret);
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return ret;
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}
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void jffs2_free_raw_inode(struct jffs2_raw_inode *x)
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{
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dbg_memalloc("%p\n", x);
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kmem_cache_free(raw_inode_slab, x);
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}
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struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void)
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{
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struct jffs2_tmp_dnode_info *ret;
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ret = kmem_cache_alloc(tmp_dnode_info_slab, GFP_KERNEL);
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dbg_memalloc("%p\n",
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ret);
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return ret;
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}
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void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *x)
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{
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dbg_memalloc("%p\n", x);
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kmem_cache_free(tmp_dnode_info_slab, x);
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}
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struct jffs2_raw_node_ref *jffs2_alloc_raw_node_ref(void)
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{
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struct jffs2_raw_node_ref *ret;
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ret = kmem_cache_alloc(raw_node_ref_slab, GFP_KERNEL);
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dbg_memalloc("%p\n", ret);
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return ret;
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}
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void jffs2_free_raw_node_ref(struct jffs2_raw_node_ref *x)
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{
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dbg_memalloc("%p\n", x);
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kmem_cache_free(raw_node_ref_slab, x);
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}
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struct jffs2_node_frag *jffs2_alloc_node_frag(void)
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{
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struct jffs2_node_frag *ret;
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ret = kmem_cache_alloc(node_frag_slab, GFP_KERNEL);
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dbg_memalloc("%p\n", ret);
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return ret;
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}
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void jffs2_free_node_frag(struct jffs2_node_frag *x)
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{
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dbg_memalloc("%p\n", x);
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kmem_cache_free(node_frag_slab, x);
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}
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struct jffs2_inode_cache *jffs2_alloc_inode_cache(void)
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{
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struct jffs2_inode_cache *ret;
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ret = kmem_cache_alloc(inode_cache_slab, GFP_KERNEL);
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dbg_memalloc("%p\n", ret);
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return ret;
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}
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void jffs2_free_inode_cache(struct jffs2_inode_cache *x)
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{
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dbg_memalloc("%p\n", x);
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kmem_cache_free(inode_cache_slab, x);
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}
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#ifdef CONFIG_JFFS2_FS_XATTR
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struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void)
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{
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struct jffs2_xattr_datum *xd;
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xd = kmem_cache_alloc(xattr_datum_cache, GFP_KERNEL);
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dbg_memalloc("%p\n", xd);
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memset(xd, 0, sizeof(struct jffs2_xattr_datum));
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xd->class = RAWNODE_CLASS_XATTR_DATUM;
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INIT_LIST_HEAD(&xd->xindex);
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return xd;
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}
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void jffs2_free_xattr_datum(struct jffs2_xattr_datum *xd)
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{
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dbg_memalloc("%p\n", xd);
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kmem_cache_free(xattr_datum_cache, xd);
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}
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struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void)
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{
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struct jffs2_xattr_ref *ref;
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ref = kmem_cache_alloc(xattr_ref_cache, GFP_KERNEL);
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dbg_memalloc("%p\n", ref);
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memset(ref, 0, sizeof(struct jffs2_xattr_ref));
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ref->class = RAWNODE_CLASS_XATTR_REF;
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INIT_LIST_HEAD(&ref->ilist);
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return ref;
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}
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void jffs2_free_xattr_ref(struct jffs2_xattr_ref *ref)
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{
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dbg_memalloc("%p\n", ref);
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kmem_cache_free(xattr_ref_cache, ref);
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}
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#endif
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