diff options
Diffstat (limited to 'fs/freevxfs/vxfs_fshead.c')
| -rw-r--r-- | fs/freevxfs/vxfs_fshead.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/fs/freevxfs/vxfs_fshead.c b/fs/freevxfs/vxfs_fshead.c new file mode 100644 index 000000000..c9a6a94e5 --- /dev/null +++ b/fs/freevxfs/vxfs_fshead.c @@ -0,0 +1,203 @@ +/* + * Copyright (c) 2000-2001 Christoph Hellwig. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL"). + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * Veritas filesystem driver - fileset header routines. + */ +#include <linux/fs.h> +#include <linux/buffer_head.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/string.h> + +#include "vxfs.h" +#include "vxfs_inode.h" +#include "vxfs_extern.h" +#include "vxfs_fshead.h" + + +#ifdef DIAGNOSTIC +static void +vxfs_dumpfsh(struct vxfs_fsh *fhp) +{ + printk("\n\ndumping fileset header:\n"); + printk("----------------------------\n"); + printk("version: %u\n", fhp->fsh_version); + printk("fsindex: %u\n", fhp->fsh_fsindex); + printk("iauino: %u\tninodes:%u\n", + fhp->fsh_iauino, fhp->fsh_ninodes); + printk("maxinode: %u\tlctino: %u\n", + fhp->fsh_maxinode, fhp->fsh_lctino); + printk("nau: %u\n", fhp->fsh_nau); + printk("ilistino[0]: %u\tilistino[1]: %u\n", + fhp->fsh_ilistino[0], fhp->fsh_ilistino[1]); +} +#endif + +/** + * vxfs_getfsh - read fileset header into memory + * @ip: the (fake) fileset header inode + * @which: 0 for the structural, 1 for the primary fsh. + * + * Description: + * vxfs_getfsh reads either the structural or primary fileset header + * described by @ip into memory. + * + * Returns: + * The fileset header structure on success, else Zero. + */ +static struct vxfs_fsh * +vxfs_getfsh(struct inode *ip, int which) +{ + struct buffer_head *bp; + + bp = vxfs_bread(ip, which); + if (bp) { + struct vxfs_fsh *fhp; + + if (!(fhp = kmalloc(sizeof(*fhp), GFP_KERNEL))) + goto out; + memcpy(fhp, bp->b_data, sizeof(*fhp)); + + put_bh(bp); + return (fhp); + } +out: + brelse(bp); + return NULL; +} + +/** + * vxfs_read_fshead - read the fileset headers + * @sbp: superblock to which the fileset belongs + * + * Description: + * vxfs_read_fshead will fill the inode and structural inode list in @sb. + * + * Returns: + * Zero on success, else a negative error code (-EINVAL). + */ +int +vxfs_read_fshead(struct super_block *sbp) +{ + struct vxfs_sb_info *infp = VXFS_SBI(sbp); + struct vxfs_fsh *pfp, *sfp; + struct vxfs_inode_info *vip, *tip; + + vip = vxfs_blkiget(sbp, infp->vsi_iext, infp->vsi_fshino); + if (!vip) { + printk(KERN_ERR "vxfs: unable to read fsh inode\n"); + return -EINVAL; + } + if (!VXFS_ISFSH(vip)) { + printk(KERN_ERR "vxfs: fsh list inode is of wrong type (%x)\n", + vip->vii_mode & VXFS_TYPE_MASK); + goto out_free_fship; + } + + +#ifdef DIAGNOSTIC + printk("vxfs: fsh inode dump:\n"); + vxfs_dumpi(vip, infp->vsi_fshino); +#endif + + infp->vsi_fship = vxfs_get_fake_inode(sbp, vip); + if (!infp->vsi_fship) { + printk(KERN_ERR "vxfs: unable to get fsh inode\n"); + goto out_free_fship; + } + + sfp = vxfs_getfsh(infp->vsi_fship, 0); + if (!sfp) { + printk(KERN_ERR "vxfs: unable to get structural fsh\n"); + goto out_iput_fship; + } + +#ifdef DIAGNOSTIC + vxfs_dumpfsh(sfp); +#endif + + pfp = vxfs_getfsh(infp->vsi_fship, 1); + if (!pfp) { + printk(KERN_ERR "vxfs: unable to get primary fsh\n"); + goto out_free_sfp; + } + +#ifdef DIAGNOSTIC + vxfs_dumpfsh(pfp); +#endif + + tip = vxfs_blkiget(sbp, infp->vsi_iext, sfp->fsh_ilistino[0]); + if (!tip) + goto out_free_pfp; + + infp->vsi_stilist = vxfs_get_fake_inode(sbp, tip); + if (!infp->vsi_stilist) { + printk(KERN_ERR "vxfs: unable to get structural list inode\n"); + kfree(tip); + goto out_free_pfp; + } + if (!VXFS_ISILT(VXFS_INO(infp->vsi_stilist))) { + printk(KERN_ERR "vxfs: structural list inode is of wrong type (%x)\n", + VXFS_INO(infp->vsi_stilist)->vii_mode & VXFS_TYPE_MASK); + goto out_iput_stilist; + } + + tip = vxfs_stiget(sbp, pfp->fsh_ilistino[0]); + if (!tip) + goto out_iput_stilist; + infp->vsi_ilist = vxfs_get_fake_inode(sbp, tip); + if (!infp->vsi_ilist) { + printk(KERN_ERR "vxfs: unable to get inode list inode\n"); + kfree(tip); + goto out_iput_stilist; + } + if (!VXFS_ISILT(VXFS_INO(infp->vsi_ilist))) { + printk(KERN_ERR "vxfs: inode list inode is of wrong type (%x)\n", + VXFS_INO(infp->vsi_ilist)->vii_mode & VXFS_TYPE_MASK); + goto out_iput_ilist; + } + + return 0; + + out_iput_ilist: + iput(infp->vsi_ilist); + out_iput_stilist: + iput(infp->vsi_stilist); + out_free_pfp: + kfree(pfp); + out_free_sfp: + kfree(sfp); + out_iput_fship: + iput(infp->vsi_fship); + return -EINVAL; + out_free_fship: + kfree(vip); + return -EINVAL; +} |