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 /*
  49  * NAME:        ialloc()
  50  *
  51  * FUNCTION:    Allocate a new inode
  52  *
  53  */
  54 struct inode *ialloc(struct inode *parent, umode_t mode)
  55 {
  56         struct super_block *sb = parent->i_sb;
  57         struct inode *inode;
  58         struct jfs_inode_info *jfs_inode;
  59         int rc;
  60
  61         inode = new_inode(sb);
  62         if (!inode) {
  63                 jfs_warn("ialloc: new_inode returned NULL!");
  64                 return inode;
  65         }
  66
  67         jfs_inode = JFS_IP(inode);
  68
  69         rc = diAlloc(parent, S_ISDIR(mode), inode);
  70         if (rc) {
  71                 jfs_warn("ialloc: diAlloc returned %d!", rc);
  72                 make_bad_inode(inode);
  73                 iput(inode);
  74                 return NULL;
  75         }
  76
  77         inode->i_uid = current->fsuid;
  78         if (parent->i_mode & S_ISGID) {
  79                 inode->i_gid = parent->i_gid;
  80                 if (S_ISDIR(mode))
  81                         mode |= S_ISGID;
  82         } else
  83                 inode->i_gid = current->fsgid;
  84
  85         /*
  86          * New inodes need to save sane values on disk when
  87          * uid & gid mount options are used
  88          */
  89         jfs_inode->saved_uid = inode->i_uid;
  90         jfs_inode->saved_gid = inode->i_gid;
  91
  92         /*
  93          * Allocate inode to quota.
  94          */
  95         if (DQUOT_ALLOC_INODE(inode)) {
  96                 DQUOT_DROP(inode);
  97                 inode->i_flags |= S_NOQUOTA;
  98                 inode->i_nlink = 0;
  99                 iput(inode);
 100                 return NULL;
 101         }
 102
 103         inode->i_mode = mode;
 104         /* inherit flags from parent */
 105         jfs_inode->mode2 = JFS_IP(parent)->mode2 & JFS_FL_INHERIT;
 106
 107         if (S_ISDIR(mode)) {
 108                 jfs_inode->mode2 |= IDIRECTORY;
 109                 jfs_inode->mode2 &= ~JFS_DIRSYNC_FL;
 110         }
 111         else {
 112                 jfs_inode->mode2 |= INLINEEA | ISPARSE;
 113                 if (S_ISLNK(mode))
 114                         jfs_inode->mode2 &= ~(JFS_IMMUTABLE_FL|JFS_APPEND_FL);
 115         }
 116         jfs_inode->mode2 |= mode;
 117
 118         inode->i_blocks = 0;
 119         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
 120         jfs_inode->otime = inode->i_ctime.tv_sec;
 121         inode->i_generation = JFS_SBI(sb)->gengen++;
 122
 123         jfs_inode->cflag = 0;
 124
 125         /* Zero remaining fields */
 126         memset(&jfs_inode->acl, 0, sizeof(dxd_t));
 127         memset(&jfs_inode->ea, 0, sizeof(dxd_t));
 128         jfs_inode->next_index = 0;
 129         jfs_inode->acltype = 0;
 130         jfs_inode->btorder = 0;
 131         jfs_inode->btindex = 0;
 132         jfs_inode->bxflag = 0;
 133         jfs_inode->blid = 0;
 134         jfs_inode->atlhead = 0;
 135         jfs_inode->atltail = 0;
 136         jfs_inode->xtlid = 0;
 137         jfs_set_inode_flags(inode);
 138
 139         jfs_info("ialloc returns inode = 0x%p\n", inode);
 140
 141         return inode;
 142 }