LXR linux/fs/jfs/jfs

   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
  29void 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
  48void 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 */
  72struct 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}
 162