fs/jfs/jfs_inode.c

   1 /*
   2  *   Copyright (C) International Business Machines Corp., 2000-2004
   3  *
   4  *   This program is free software;  you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License as published by
   6  *   the Free Software Foundation; either version 2 of the License, or
   7  *   (at your option) any later version.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  12  *   the GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program;  if not, write to the Free Software
  16  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  17  */
  18
  19 #include <linux/fs.h>
  20 #include <linux/quotaops.h>
  21 #include "jfs_incore.h"
  22 #include "jfs_inode.h"
  23 #include "jfs_filsys.h"
  24 #include "jfs_imap.h"
  25 #include "jfs_dinode.h"
  26 #include "jfs_debug.h"
  27
  28 /*
  29  * NAME:        ialloc()
  30  *
  31  * FUNCTION:    Allocate a new inode
  32  *
  33  */
  34 struct inode *ialloc(struct inode *parent, umode_t mode)
  35 {
  36         struct super_block *sb = parent->i_sb;
  37         struct inode *inode;
  38         struct jfs_inode_info *jfs_inode;
  39         int rc;
  40
  41         inode = new_inode(sb);
  42         if (!inode) {
  43                 jfs_warn("ialloc: new_inode returned NULL!");
  44                 return inode;
  45         }
  46
  47         jfs_inode = JFS_IP(inode);
  48
  49         rc = diAlloc(parent, S_ISDIR(mode), inode);
  50         if (rc) {
  51                 jfs_warn("ialloc: diAlloc returned %d!", rc);
  52                 make_bad_inode(inode);
  53                 iput(inode);
  54                 return NULL;
  55         }
  56
  57         inode->i_uid = current->fsuid;
  58         if (parent->i_mode & S_ISGID) {
  59                 inode->i_gid = parent->i_gid;
  60                 if (S_ISDIR(mode))
  61                         mode |= S_ISGID;
  62         } else
  63                 inode->i_gid = current->fsgid;
  64
  65         /*
  66          * Allocate inode to quota.
  67          */
  68         if (DQUOT_ALLOC_INODE(inode)) {
  69                 DQUOT_DROP(inode);
  70                 inode->i_flags |= S_NOQUOTA;
  71                 inode->i_nlink = 0;
  72                 iput(inode);
  73                 return NULL;
  74         }
  75
  76         inode->i_mode = mode;
  77         if (S_ISDIR(mode))
  78                 jfs_inode->mode2 = IDIRECTORY | mode;
  79         else
  80                 jfs_inode->mode2 = INLINEEA | ISPARSE | mode;
  81         inode->i_blksize = sb->s_blocksize;
  82         inode->i_blocks = 0;
  83         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
  84         jfs_inode->otime = inode->i_ctime.tv_sec;
  85         inode->i_generation = JFS_SBI(sb)->gengen++;
  86
  87         jfs_inode->cflag = 0;
  88
  89         /* Zero remaining fields */
  90         memset(&jfs_inode->acl, 0, sizeof(dxd_t));
  91         memset(&jfs_inode->ea, 0, sizeof(dxd_t));
  92         jfs_inode->next_index = 0;
  93         jfs_inode->acltype = 0;
  94         jfs_inode->btorder = 0;
  95         jfs_inode->btindex = 0;
  96         jfs_inode->bxflag = 0;
  97         jfs_inode->blid = 0;
  98         jfs_inode->atlhead = 0;
  99         jfs_inode->atltail = 0;
 100         jfs_inode->xtlid = 0;
 101
 102         jfs_info("ialloc returns inode = 0x%p\n", inode);
 103
 104         return inode;
 105 }