diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/ocfs2/sysfile.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/ocfs2/sysfile.c | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/ANDROID_3.4.5/fs/ocfs2/sysfile.c b/ANDROID_3.4.5/fs/ocfs2/sysfile.c deleted file mode 100644 index 3d635f4b..00000000 --- a/ANDROID_3.4.5/fs/ocfs2/sysfile.c +++ /dev/null @@ -1,180 +0,0 @@ -/* -*- mode: c; c-basic-offset: 8; -*- - * vim: noexpandtab sw=8 ts=8 sts=0: - * - * sysfile.c - * - * Initialize, read, write, etc. system files. - * - * Copyright (C) 2002, 2004 Oracle. All rights reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 021110-1307, USA. - */ - -#include <linux/fs.h> -#include <linux/types.h> -#include <linux/highmem.h> - -#include <cluster/masklog.h> - -#include "ocfs2.h" - -#include "alloc.h" -#include "dir.h" -#include "inode.h" -#include "journal.h" -#include "sysfile.h" - -#include "buffer_head_io.h" - -static struct inode * _ocfs2_get_system_file_inode(struct ocfs2_super *osb, - int type, - u32 slot); - -#ifdef CONFIG_DEBUG_LOCK_ALLOC -static struct lock_class_key ocfs2_sysfile_cluster_lock_key[NUM_SYSTEM_INODES]; -#endif - -static inline int is_global_system_inode(int type) -{ - return type >= OCFS2_FIRST_ONLINE_SYSTEM_INODE && - type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; -} - -static struct inode **get_local_system_inode(struct ocfs2_super *osb, - int type, - u32 slot) -{ - int index; - struct inode **local_system_inodes, **free = NULL; - - BUG_ON(slot == OCFS2_INVALID_SLOT); - BUG_ON(type < OCFS2_FIRST_LOCAL_SYSTEM_INODE || - type > OCFS2_LAST_LOCAL_SYSTEM_INODE); - - spin_lock(&osb->osb_lock); - local_system_inodes = osb->local_system_inodes; - spin_unlock(&osb->osb_lock); - - if (unlikely(!local_system_inodes)) { - local_system_inodes = kzalloc(sizeof(struct inode *) * - NUM_LOCAL_SYSTEM_INODES * - osb->max_slots, - GFP_NOFS); - if (!local_system_inodes) { - mlog_errno(-ENOMEM); - /* - * return NULL here so that ocfs2_get_sytem_file_inodes - * will try to create an inode and use it. We will try - * to initialize local_system_inodes next time. - */ - return NULL; - } - - spin_lock(&osb->osb_lock); - if (osb->local_system_inodes) { - /* Someone has initialized it for us. */ - free = local_system_inodes; - local_system_inodes = osb->local_system_inodes; - } else - osb->local_system_inodes = local_system_inodes; - spin_unlock(&osb->osb_lock); - if (unlikely(free)) - kfree(free); - } - - index = (slot * NUM_LOCAL_SYSTEM_INODES) + - (type - OCFS2_FIRST_LOCAL_SYSTEM_INODE); - - return &local_system_inodes[index]; -} - -struct inode *ocfs2_get_system_file_inode(struct ocfs2_super *osb, - int type, - u32 slot) -{ - struct inode *inode = NULL; - struct inode **arr = NULL; - - /* avoid the lookup if cached in local system file array */ - if (is_global_system_inode(type)) { - arr = &(osb->global_system_inodes[type]); - } else - arr = get_local_system_inode(osb, type, slot); - - if (arr && ((inode = *arr) != NULL)) { - /* get a ref in addition to the array ref */ - inode = igrab(inode); - BUG_ON(!inode); - - return inode; - } - - /* this gets one ref thru iget */ - inode = _ocfs2_get_system_file_inode(osb, type, slot); - - /* add one more if putting into array for first time */ - if (arr && inode) { - *arr = igrab(inode); - BUG_ON(!*arr); - } - return inode; -} - -static struct inode * _ocfs2_get_system_file_inode(struct ocfs2_super *osb, - int type, - u32 slot) -{ - char namebuf[40]; - struct inode *inode = NULL; - u64 blkno; - int status = 0; - - ocfs2_sprintf_system_inode_name(namebuf, - sizeof(namebuf), - type, slot); - - status = ocfs2_lookup_ino_from_name(osb->sys_root_inode, namebuf, - strlen(namebuf), &blkno); - if (status < 0) { - goto bail; - } - - inode = ocfs2_iget(osb, blkno, OCFS2_FI_FLAG_SYSFILE, type); - if (IS_ERR(inode)) { - mlog_errno(PTR_ERR(inode)); - inode = NULL; - goto bail; - } -#ifdef CONFIG_DEBUG_LOCK_ALLOC - if (type == LOCAL_USER_QUOTA_SYSTEM_INODE || - type == LOCAL_GROUP_QUOTA_SYSTEM_INODE || - type == JOURNAL_SYSTEM_INODE) { - /* Ignore inode lock on these inodes as the lock does not - * really belong to any process and lockdep cannot handle - * that */ - OCFS2_I(inode)->ip_inode_lockres.l_lockdep_map.key = NULL; - } else { - lockdep_init_map(&OCFS2_I(inode)->ip_inode_lockres. - l_lockdep_map, - ocfs2_system_inodes[type].si_name, - &ocfs2_sysfile_cluster_lock_key[type], 0); - } -#endif -bail: - - return inode; -} - |