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![Christoph Lameter](/assets/img/avatar_default.png)
Slab constructors currently have a flags parameter that is never used. And the order of the arguments is opposite to other slab functions. The object pointer is placed before the kmem_cache pointer. Convert ctor(void *object, struct kmem_cache *s, unsigned long flags) to ctor(struct kmem_cache *s, void *object) throughout the kernel [akpm@linux-foundation.org: coupla fixes] Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
240 lines
6 KiB
C
240 lines
6 KiB
C
/*
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* JFFS2 -- Journalling Flash File System, Version 2.
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*
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* Copyright © 2001-2007 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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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/fs.h>
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#include <linux/err.h>
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#include <linux/mount.h>
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#include <linux/jffs2.h>
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#include <linux/pagemap.h>
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#include <linux/mtd/super.h>
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#include <linux/ctype.h>
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#include <linux/namei.h>
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#include "compr.h"
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#include "nodelist.h"
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static void jffs2_put_super(struct super_block *);
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static struct kmem_cache *jffs2_inode_cachep;
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static struct inode *jffs2_alloc_inode(struct super_block *sb)
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{
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struct jffs2_inode_info *ei;
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ei = (struct jffs2_inode_info *)kmem_cache_alloc(jffs2_inode_cachep, GFP_KERNEL);
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if (!ei)
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return NULL;
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return &ei->vfs_inode;
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}
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static void jffs2_destroy_inode(struct inode *inode)
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{
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kmem_cache_free(jffs2_inode_cachep, JFFS2_INODE_INFO(inode));
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}
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static void jffs2_i_init_once(struct kmem_cache *cachep, void *foo)
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{
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struct jffs2_inode_info *ei = (struct jffs2_inode_info *) foo;
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init_MUTEX(&ei->sem);
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inode_init_once(&ei->vfs_inode);
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}
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static int jffs2_sync_fs(struct super_block *sb, int wait)
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{
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struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
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down(&c->alloc_sem);
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jffs2_flush_wbuf_pad(c);
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up(&c->alloc_sem);
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return 0;
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}
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static const struct super_operations jffs2_super_operations =
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{
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.alloc_inode = jffs2_alloc_inode,
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.destroy_inode =jffs2_destroy_inode,
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.read_inode = jffs2_read_inode,
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.put_super = jffs2_put_super,
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.write_super = jffs2_write_super,
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.statfs = jffs2_statfs,
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.remount_fs = jffs2_remount_fs,
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.clear_inode = jffs2_clear_inode,
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.dirty_inode = jffs2_dirty_inode,
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.sync_fs = jffs2_sync_fs,
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};
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/*
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* fill in the superblock
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*/
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static int jffs2_fill_super(struct super_block *sb, void *data, int silent)
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{
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struct jffs2_sb_info *c;
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D1(printk(KERN_DEBUG "jffs2_get_sb_mtd():"
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" New superblock for device %d (\"%s\")\n",
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sb->s_mtd->index, sb->s_mtd->name));
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c = kzalloc(sizeof(*c), GFP_KERNEL);
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if (!c)
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return -ENOMEM;
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c->mtd = sb->s_mtd;
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c->os_priv = sb;
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sb->s_fs_info = c;
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/* Initialize JFFS2 superblock locks, the further initialization will
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* be done later */
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init_MUTEX(&c->alloc_sem);
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init_MUTEX(&c->erase_free_sem);
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init_waitqueue_head(&c->erase_wait);
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init_waitqueue_head(&c->inocache_wq);
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spin_lock_init(&c->erase_completion_lock);
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spin_lock_init(&c->inocache_lock);
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sb->s_op = &jffs2_super_operations;
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sb->s_flags = sb->s_flags | MS_NOATIME;
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sb->s_xattr = jffs2_xattr_handlers;
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#ifdef CONFIG_JFFS2_FS_POSIX_ACL
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sb->s_flags |= MS_POSIXACL;
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#endif
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return jffs2_do_fill_super(sb, data, silent);
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}
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static int jffs2_get_sb(struct file_system_type *fs_type,
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int flags, const char *dev_name,
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void *data, struct vfsmount *mnt)
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{
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return get_sb_mtd(fs_type, flags, dev_name, data, jffs2_fill_super,
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mnt);
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}
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static void jffs2_put_super (struct super_block *sb)
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{
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struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
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D2(printk(KERN_DEBUG "jffs2: jffs2_put_super()\n"));
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down(&c->alloc_sem);
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jffs2_flush_wbuf_pad(c);
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up(&c->alloc_sem);
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jffs2_sum_exit(c);
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jffs2_free_ino_caches(c);
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jffs2_free_raw_node_refs(c);
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if (jffs2_blocks_use_vmalloc(c))
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vfree(c->blocks);
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else
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kfree(c->blocks);
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jffs2_flash_cleanup(c);
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kfree(c->inocache_list);
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jffs2_clear_xattr_subsystem(c);
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if (c->mtd->sync)
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c->mtd->sync(c->mtd);
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D1(printk(KERN_DEBUG "jffs2_put_super returning\n"));
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}
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static void jffs2_kill_sb(struct super_block *sb)
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{
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struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
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if (!(sb->s_flags & MS_RDONLY))
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jffs2_stop_garbage_collect_thread(c);
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kill_mtd_super(sb);
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kfree(c);
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}
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static struct file_system_type jffs2_fs_type = {
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.owner = THIS_MODULE,
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.name = "jffs2",
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.get_sb = jffs2_get_sb,
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.kill_sb = jffs2_kill_sb,
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};
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static int __init init_jffs2_fs(void)
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{
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int ret;
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/* Paranoia checks for on-medium structures. If we ask GCC
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to pack them with __attribute__((packed)) then it _also_
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assumes that they're not aligned -- so it emits crappy
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code on some architectures. Ideally we want an attribute
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which means just 'no padding', without the alignment
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thing. But GCC doesn't have that -- we have to just
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hope the structs are the right sizes, instead. */
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BUILD_BUG_ON(sizeof(struct jffs2_unknown_node) != 12);
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BUILD_BUG_ON(sizeof(struct jffs2_raw_dirent) != 40);
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BUILD_BUG_ON(sizeof(struct jffs2_raw_inode) != 68);
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BUILD_BUG_ON(sizeof(struct jffs2_raw_summary) != 32);
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printk(KERN_INFO "JFFS2 version 2.2."
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#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
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" (NAND)"
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#endif
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#ifdef CONFIG_JFFS2_SUMMARY
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" (SUMMARY) "
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#endif
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" © 2001-2006 Red Hat, Inc.\n");
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jffs2_inode_cachep = kmem_cache_create("jffs2_i",
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sizeof(struct jffs2_inode_info),
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0, (SLAB_RECLAIM_ACCOUNT|
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SLAB_MEM_SPREAD),
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jffs2_i_init_once);
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if (!jffs2_inode_cachep) {
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printk(KERN_ERR "JFFS2 error: Failed to initialise inode cache\n");
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return -ENOMEM;
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}
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ret = jffs2_compressors_init();
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if (ret) {
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printk(KERN_ERR "JFFS2 error: Failed to initialise compressors\n");
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goto out;
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}
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ret = jffs2_create_slab_caches();
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if (ret) {
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printk(KERN_ERR "JFFS2 error: Failed to initialise slab caches\n");
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goto out_compressors;
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}
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ret = register_filesystem(&jffs2_fs_type);
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if (ret) {
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printk(KERN_ERR "JFFS2 error: Failed to register filesystem\n");
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goto out_slab;
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}
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return 0;
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out_slab:
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jffs2_destroy_slab_caches();
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out_compressors:
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jffs2_compressors_exit();
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out:
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kmem_cache_destroy(jffs2_inode_cachep);
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return ret;
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}
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static void __exit exit_jffs2_fs(void)
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{
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unregister_filesystem(&jffs2_fs_type);
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jffs2_destroy_slab_caches();
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jffs2_compressors_exit();
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kmem_cache_destroy(jffs2_inode_cachep);
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}
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module_init(init_jffs2_fs);
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module_exit(exit_jffs2_fs);
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MODULE_DESCRIPTION("The Journalling Flash File System, v2");
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MODULE_AUTHOR("Red Hat, Inc.");
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MODULE_LICENSE("GPL"); // Actually dual-licensed, but it doesn't matter for
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// the sake of this tag. It's Free Software.
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