jfs_inode.c
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上传日期:2013-04-10
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文件大小:3k
- /*
- * Copyright (c) International Business Machines Corp., 2000-2002
- *
- * 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 02111-1307 USA
- */
- #include <linux/fs.h>
- #include "jfs_incore.h"
- #include "jfs_filsys.h"
- #include "jfs_imap.h"
- #include "jfs_dinode.h"
- #include "jfs_debug.h"
- kmem_cache_t *jfs_inode_cachep;
- /*
- * NAME: ialloc()
- *
- * FUNCTION: Allocate a new inode
- *
- */
- struct inode *ialloc(struct inode *parent, umode_t mode)
- {
- struct super_block *sb = parent->i_sb;
- struct inode *inode;
- struct jfs_inode_info *jfs_inode;
- int rc;
- inode = new_inode(sb);
- if (!inode) {
- jERROR(1, ("ialloc: new_inode returned NULL!n"));
- return inode;
- }
- rc = alloc_jfs_inode(inode);
- if (rc) {
- make_bad_inode(inode);
- iput(inode);
- return NULL;
- }
- jfs_inode = JFS_IP(inode);
- rc = diAlloc(parent, S_ISDIR(mode), inode);
- if (rc) {
- jERROR(1, ("ialloc: diAlloc returned %d!n", rc));
- free_jfs_inode(inode);
- make_bad_inode(inode);
- iput(inode);
- return NULL;
- }
- inode->i_uid = current->fsuid;
- if (parent->i_mode & S_ISGID) {
- inode->i_gid = parent->i_gid;
- if (S_ISDIR(mode))
- mode |= S_ISGID;
- } else
- inode->i_gid = current->fsgid;
- inode->i_mode = mode;
- if (S_ISDIR(mode))
- jfs_inode->mode2 = IDIRECTORY | mode;
- else
- jfs_inode->mode2 = INLINEEA | ISPARSE | mode;
- inode->i_blksize = sb->s_blocksize;
- inode->i_blocks = 0;
- inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
- jfs_inode->otime = inode->i_ctime;
- inode->i_generation = JFS_SBI(sb)->gengen++;
- jfs_inode->cflag = 0;
- set_cflag(COMMIT_New, inode);
- /* Zero remaining fields */
- memset(&jfs_inode->acl, 0, sizeof(dxd_t));
- memset(&jfs_inode->ea, 0, sizeof(dxd_t));
- jfs_inode->next_index = 0;
- jfs_inode->acltype = 0;
- jfs_inode->btorder = 0;
- jfs_inode->btindex = 0;
- jfs_inode->bxflag = 0;
- jfs_inode->blid = 0;
- jfs_inode->atlhead = 0;
- jfs_inode->atltail = 0;
- jfs_inode->xtlid = 0;
- jFYI(1, ("ialloc returns inode = 0x%pn", inode));
- return inode;
- }
- /*
- * NAME: alloc_jfs_inode()
- *
- * FUNCTION: Allocate jfs portion of in-memory inode
- *
- */
- int alloc_jfs_inode(struct inode *inode)
- {
- struct jfs_inode_info *jfs_inode;
- jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS);
- inode->u.generic_ip = jfs_inode;
- if (!jfs_inode)
- return -ENOSPC;
- jfs_inode->inode = inode;
- return 0;
- }