release/src-rt-6.x/linux/linux-2.6/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 void jfs_set_inode_flags(struct inode *inode)
  30 {
  31         unsigned int flags = JFS_IP(inode)->mode2;
  32
  33         inode->i_flags &= ~(S_IMMUTABLE | S_APPEND |
  34                 S_NOATIME | S_DIRSYNC | S_SYNC);
  35
  36         if (flags & JFS_IMMUTABLE_FL)
  37                 inode->i_flags |= S_IMMUTABLE;
  38         if (flags & JFS_APPEND_FL)
  39                 inode->i_flags |= S_APPEND;
  40         if (flags & JFS_NOATIME_FL)
  41                 inode->i_flags |= S_NOATIME;
  42         if (flags & JFS_DIRSYNC_FL)
  43                 inode->i_flags |= S_DIRSYNC;
  44         if (flags & JFS_SYNC_FL)
  45                 inode->i_flags |= S_SYNC;
  46 }
  47
  48 void jfs_get_inode_flags(struct jfs_inode_info *jfs_ip)
  49 {
  50         unsigned int flags = jfs_ip->vfs_inode.i_flags;
  51
  52         jfs_ip->mode2 &= ~(JFS_IMMUTABLE_FL | JFS_APPEND_FL | JFS_NOATIME_FL |
  53                            JFS_DIRSYNC_FL | JFS_SYNC_FL);
  54         if (flags & S_IMMUTABLE)
  55                 jfs_ip->mode2 |= JFS_IMMUTABLE_FL;
  56         if (flags & S_APPEND)
  57                 jfs_ip->mode2 |= JFS_APPEND_FL;
  58         if (flags & S_NOATIME)
  59                 jfs_ip->mode2 |= JFS_NOATIME_FL;
  60         if (flags & S_DIRSYNC)
  61                 jfs_ip->mode2 |= JFS_DIRSYNC_FL;
  62         if (flags & S_SYNC)
  63                 jfs_ip->mode2 |= JFS_SYNC_FL;
  64 }
  65
  66 /*
  67  * NAME:        ialloc()
  68  *
  69  * FUNCTION:    Allocate a new inode
  70  *
  71  */
  72 struct inode *ialloc(struct inode *parent, umode_t mode)
  73 {
  74         struct super_block *sb = parent->i_sb;
  75         struct inode *inode;
  76         struct jfs_inode_info *jfs_inode;
  77         int rc;
  78
  79         inode = new_inode(sb);
  80         if (!inode) {
  81                 jfs_warn("ialloc: new_inode returned NULL!");
  82                 return ERR_PTR(-ENOMEM);
  83         }
  84
  85         jfs_inode = JFS_IP(inode);
  86
  87         rc = diAlloc(parent, S_ISDIR(mode), inode);
  88         if (rc) {
  89                 jfs_warn("ialloc: diAlloc returned %d!", rc);
  90                 if (rc == -EIO)
  91                         make_bad_inode(inode);
  92                 iput(inode);
  93                 return ERR_PTR(rc);
  94         }
  95
  96         inode->i_uid = current->fsuid;
  97         if (parent->i_mode & S_ISGID) {
  98                 inode->i_gid = parent->i_gid;
  99                 if (S_ISDIR(mode))
 100                         mode |= S_ISGID;
 101         } else
 102                 inode->i_gid = current->fsgid;
 103
 104         /*
 105          * New inodes need to save sane values on disk when
 106          * uid & gid mount options are used
 107          */
 108         jfs_inode->saved_uid = inode->i_uid;
 109         jfs_inode->saved_gid = inode->i_gid;
 110
 111         /*
 112          * Allocate inode to quota.
 113          */
 114         if (DQUOT_ALLOC_INODE(inode)) {
 115                 DQUOT_DROP(inode);
 116                 inode->i_flags |= S_NOQUOTA;
 117                 inode->i_nlink = 0;
 118                 iput(inode);
 119                 return ERR_PTR(-EDQUOT);
 120         }
 121
 122         inode->i_mode = mode;
 123         /* inherit flags from parent */
 124         jfs_inode->mode2 = JFS_IP(parent)->mode2 & JFS_FL_INHERIT;
 125
 126         if (S_ISDIR(mode)) {
 127                 jfs_inode->mode2 |= IDIRECTORY;
 128                 jfs_inode->mode2 &= ~JFS_DIRSYNC_FL;
 129         }
 130         else {
 131                 jfs_inode->mode2 |= INLINEEA | ISPARSE;
 132                 if (S_ISLNK(mode))
 133                         jfs_inode->mode2 &= ~(JFS_IMMUTABLE_FL|JFS_APPEND_FL);
 134         }
 135         jfs_inode->mode2 |= mode;
 136
 137         inode->i_blocks = 0;
 138         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
 139         jfs_inode->otime = inode->i_ctime.tv_sec;
 140         inode->i_generation = JFS_SBI(sb)->gengen++;
 141
 142         jfs_inode->cflag = 0;
 143
 144         /* Zero remaining fields */
 145         memset(&jfs_inode->acl, 0, sizeof(dxd_t));
 146         memset(&jfs_inode->ea, 0, sizeof(dxd_t));
 147         jfs_inode->next_index = 0;
 148         jfs_inode->acltype = 0;
 149         jfs_inode->btorder = 0;
 150         jfs_inode->btindex = 0;
 151         jfs_inode->bxflag = 0;
 152         jfs_inode->blid = 0;
 153         jfs_inode->atlhead = 0;
 154         jfs_inode->atltail = 0;
 155         jfs_inode->xtlid = 0;
 156         jfs_set_inode_flags(inode);
 157
 158         jfs_info("ialloc returns inode = 0x%p\n", inode);
 159
 160         return inode;
 161 }