root/fs/jfs/jfs_inode.c

DEFINITIONS

1. jfs_set_inode_flags
2. jfs_get_inode_flags
3. ialloc

/*
 *   Copyright (C) International Business Machines Corp., 2000-2004
 *
 *   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 <linux/quotaops.h>
#include "jfs_incore.h"
#include "jfs_inode.h"
#include "jfs_filsys.h"
#include "jfs_imap.h"
#include "jfs_dinode.h"
#include "jfs_debug.h"


void jfs_set_inode_flags(struct inode *inode)
{
        unsigned int flags = JFS_IP(inode)->mode2;

        inode->i_flags &= ~(S_IMMUTABLE | S_APPEND |
                S_NOATIME | S_DIRSYNC | S_SYNC);

        if (flags & JFS_IMMUTABLE_FL)
                inode->i_flags |= S_IMMUTABLE;
        if (flags & JFS_APPEND_FL)
                inode->i_flags |= S_APPEND;
        if (flags & JFS_NOATIME_FL)
                inode->i_flags |= S_NOATIME;
        if (flags & JFS_DIRSYNC_FL)
                inode->i_flags |= S_DIRSYNC;
        if (flags & JFS_SYNC_FL)
                inode->i_flags |= S_SYNC;
}

void jfs_get_inode_flags(struct jfs_inode_info *jfs_ip)
{
        unsigned int flags = jfs_ip->vfs_inode.i_flags;

        jfs_ip->mode2 &= ~(JFS_IMMUTABLE_FL | JFS_APPEND_FL | JFS_NOATIME_FL |
                           JFS_DIRSYNC_FL | JFS_SYNC_FL);
        if (flags & S_IMMUTABLE)
                jfs_ip->mode2 |= JFS_IMMUTABLE_FL;
        if (flags & S_APPEND)
                jfs_ip->mode2 |= JFS_APPEND_FL;
        if (flags & S_NOATIME)
                jfs_ip->mode2 |= JFS_NOATIME_FL;
        if (flags & S_DIRSYNC)
                jfs_ip->mode2 |= JFS_DIRSYNC_FL;
        if (flags & S_SYNC)
                jfs_ip->mode2 |= JFS_SYNC_FL;
}

/*
 * 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) {
                jfs_warn("ialloc: new_inode returned NULL!");
                return ERR_PTR(-ENOMEM);
        }

        jfs_inode = JFS_IP(inode);

        rc = diAlloc(parent, S_ISDIR(mode), inode);
        if (rc) {
                jfs_warn("ialloc: diAlloc returned %d!", rc);
                if (rc == -EIO)
                        make_bad_inode(inode);
                iput(inode);
                return ERR_PTR(rc);
        }

        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;

        /*
         * New inodes need to save sane values on disk when
         * uid & gid mount options are used
         */
        jfs_inode->saved_uid = inode->i_uid;
        jfs_inode->saved_gid = inode->i_gid;

        /*
         * Allocate inode to quota.
         */
        if (DQUOT_ALLOC_INODE(inode)) {
                DQUOT_DROP(inode);
                inode->i_flags |= S_NOQUOTA;
                inode->i_nlink = 0;
                iput(inode);
                return ERR_PTR(-EDQUOT);
        }

        inode->i_mode = mode;
        /* inherit flags from parent */
        jfs_inode->mode2 = JFS_IP(parent)->mode2 & JFS_FL_INHERIT;

        if (S_ISDIR(mode)) {
                jfs_inode->mode2 |= IDIRECTORY;
                jfs_inode->mode2 &= ~JFS_DIRSYNC_FL;
        }
        else {
                jfs_inode->mode2 |= INLINEEA | ISPARSE;
                if (S_ISLNK(mode))
                        jfs_inode->mode2 &= ~(JFS_IMMUTABLE_FL|JFS_APPEND_FL);
        }
        jfs_inode->mode2 |= mode;

        inode->i_blocks = 0;
        inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
        jfs_inode->otime = inode->i_ctime.tv_sec;
        inode->i_generation = JFS_SBI(sb)->gengen++;

        jfs_inode->cflag = 0;

        /* 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;
        jfs_set_inode_flags(inode);

        jfs_info("ialloc returns inode = 0x%p\n", inode);

        return inode;
}