1*0b1e987cSChristoph Hellwig // SPDX-License-Identifier: GPL-2.0-only
21da177e4SLinus Torvalds /*
31da177e4SLinus Torvalds * Copyright (c) 2000-2001 Christoph Hellwig.
41cce1701SKrzysztof Błaszkowski * Copyright (c) 2016 Krzysztof Blaszkowski
51da177e4SLinus Torvalds */
61da177e4SLinus Torvalds
71da177e4SLinus Torvalds /*
81da177e4SLinus Torvalds * Veritas filesystem driver - fileset header routines.
91da177e4SLinus Torvalds */
101da177e4SLinus Torvalds #include <linux/fs.h>
111da177e4SLinus Torvalds #include <linux/buffer_head.h>
121da177e4SLinus Torvalds #include <linux/kernel.h>
131da177e4SLinus Torvalds #include <linux/slab.h>
141da177e4SLinus Torvalds #include <linux/string.h>
151da177e4SLinus Torvalds
161da177e4SLinus Torvalds #include "vxfs.h"
171da177e4SLinus Torvalds #include "vxfs_inode.h"
181da177e4SLinus Torvalds #include "vxfs_extern.h"
191da177e4SLinus Torvalds #include "vxfs_fshead.h"
201da177e4SLinus Torvalds
211da177e4SLinus Torvalds
221da177e4SLinus Torvalds #ifdef DIAGNOSTIC
231da177e4SLinus Torvalds static void
vxfs_dumpfsh(struct vxfs_fsh * fhp)241da177e4SLinus Torvalds vxfs_dumpfsh(struct vxfs_fsh *fhp)
251da177e4SLinus Torvalds {
261da177e4SLinus Torvalds printk("\n\ndumping fileset header:\n");
271da177e4SLinus Torvalds printk("----------------------------\n");
281da177e4SLinus Torvalds printk("version: %u\n", fhp->fsh_version);
291da177e4SLinus Torvalds printk("fsindex: %u\n", fhp->fsh_fsindex);
301da177e4SLinus Torvalds printk("iauino: %u\tninodes:%u\n",
311da177e4SLinus Torvalds fhp->fsh_iauino, fhp->fsh_ninodes);
321da177e4SLinus Torvalds printk("maxinode: %u\tlctino: %u\n",
331da177e4SLinus Torvalds fhp->fsh_maxinode, fhp->fsh_lctino);
341da177e4SLinus Torvalds printk("nau: %u\n", fhp->fsh_nau);
351da177e4SLinus Torvalds printk("ilistino[0]: %u\tilistino[1]: %u\n",
361da177e4SLinus Torvalds fhp->fsh_ilistino[0], fhp->fsh_ilistino[1]);
371da177e4SLinus Torvalds }
381da177e4SLinus Torvalds #endif
391da177e4SLinus Torvalds
401da177e4SLinus Torvalds /**
411da177e4SLinus Torvalds * vxfs_getfsh - read fileset header into memory
421da177e4SLinus Torvalds * @ip: the (fake) fileset header inode
431da177e4SLinus Torvalds * @which: 0 for the structural, 1 for the primary fsh.
441da177e4SLinus Torvalds *
451da177e4SLinus Torvalds * Description:
461da177e4SLinus Torvalds * vxfs_getfsh reads either the structural or primary fileset header
471da177e4SLinus Torvalds * described by @ip into memory.
481da177e4SLinus Torvalds *
491da177e4SLinus Torvalds * Returns:
501da177e4SLinus Torvalds * The fileset header structure on success, else Zero.
511da177e4SLinus Torvalds */
521da177e4SLinus Torvalds static struct vxfs_fsh *
vxfs_getfsh(struct inode * ip,int which)531da177e4SLinus Torvalds vxfs_getfsh(struct inode *ip, int which)
541da177e4SLinus Torvalds {
551da177e4SLinus Torvalds struct buffer_head *bp;
561da177e4SLinus Torvalds
571da177e4SLinus Torvalds bp = vxfs_bread(ip, which);
58ba03bda8SPekka Enberg if (bp) {
591da177e4SLinus Torvalds struct vxfs_fsh *fhp;
601da177e4SLinus Torvalds
61ba03bda8SPekka Enberg if (!(fhp = kmalloc(sizeof(*fhp), GFP_KERNEL)))
62ba03bda8SPekka Enberg goto out;
631da177e4SLinus Torvalds memcpy(fhp, bp->b_data, sizeof(*fhp));
641da177e4SLinus Torvalds
65ba03bda8SPekka Enberg put_bh(bp);
661da177e4SLinus Torvalds return (fhp);
671da177e4SLinus Torvalds }
68ba03bda8SPekka Enberg out:
69ba03bda8SPekka Enberg brelse(bp);
701da177e4SLinus Torvalds return NULL;
711da177e4SLinus Torvalds }
721da177e4SLinus Torvalds
731da177e4SLinus Torvalds /**
741da177e4SLinus Torvalds * vxfs_read_fshead - read the fileset headers
751da177e4SLinus Torvalds * @sbp: superblock to which the fileset belongs
761da177e4SLinus Torvalds *
771da177e4SLinus Torvalds * Description:
781da177e4SLinus Torvalds * vxfs_read_fshead will fill the inode and structural inode list in @sb.
791da177e4SLinus Torvalds *
801da177e4SLinus Torvalds * Returns:
811da177e4SLinus Torvalds * Zero on success, else a negative error code (-EINVAL).
821da177e4SLinus Torvalds */
831da177e4SLinus Torvalds int
vxfs_read_fshead(struct super_block * sbp)841da177e4SLinus Torvalds vxfs_read_fshead(struct super_block *sbp)
851da177e4SLinus Torvalds {
861da177e4SLinus Torvalds struct vxfs_sb_info *infp = VXFS_SBI(sbp);
871da177e4SLinus Torvalds struct vxfs_fsh *pfp, *sfp;
888985f53eSKrzysztof Błaszkowski struct vxfs_inode_info *vip;
891da177e4SLinus Torvalds
908985f53eSKrzysztof Błaszkowski infp->vsi_fship = vxfs_blkiget(sbp, infp->vsi_iext, infp->vsi_fshino);
918985f53eSKrzysztof Błaszkowski if (!infp->vsi_fship) {
92552c0348SCliff Wickman printk(KERN_ERR "vxfs: unable to read fsh inode\n");
931da177e4SLinus Torvalds return -EINVAL;
941da177e4SLinus Torvalds }
958985f53eSKrzysztof Błaszkowski
968985f53eSKrzysztof Błaszkowski vip = VXFS_INO(infp->vsi_fship);
971da177e4SLinus Torvalds if (!VXFS_ISFSH(vip)) {
981da177e4SLinus Torvalds printk(KERN_ERR "vxfs: fsh list inode is of wrong type (%x)\n",
991da177e4SLinus Torvalds vip->vii_mode & VXFS_TYPE_MASK);
1008985f53eSKrzysztof Błaszkowski goto out_iput_fship;
1011da177e4SLinus Torvalds }
1021da177e4SLinus Torvalds
1031da177e4SLinus Torvalds #ifdef DIAGNOSTIC
1041da177e4SLinus Torvalds printk("vxfs: fsh inode dump:\n");
1051da177e4SLinus Torvalds vxfs_dumpi(vip, infp->vsi_fshino);
1061da177e4SLinus Torvalds #endif
1071da177e4SLinus Torvalds
1081da177e4SLinus Torvalds sfp = vxfs_getfsh(infp->vsi_fship, 0);
1091da177e4SLinus Torvalds if (!sfp) {
110552c0348SCliff Wickman printk(KERN_ERR "vxfs: unable to get structural fsh\n");
1111da177e4SLinus Torvalds goto out_iput_fship;
1121da177e4SLinus Torvalds }
1131da177e4SLinus Torvalds
1141da177e4SLinus Torvalds #ifdef DIAGNOSTIC
1151da177e4SLinus Torvalds vxfs_dumpfsh(sfp);
1161da177e4SLinus Torvalds #endif
1171da177e4SLinus Torvalds
1181da177e4SLinus Torvalds pfp = vxfs_getfsh(infp->vsi_fship, 1);
1191da177e4SLinus Torvalds if (!pfp) {
120552c0348SCliff Wickman printk(KERN_ERR "vxfs: unable to get primary fsh\n");
1211da177e4SLinus Torvalds goto out_free_sfp;
1221da177e4SLinus Torvalds }
1231da177e4SLinus Torvalds
1241da177e4SLinus Torvalds #ifdef DIAGNOSTIC
1251da177e4SLinus Torvalds vxfs_dumpfsh(pfp);
1261da177e4SLinus Torvalds #endif
1271da177e4SLinus Torvalds
1288985f53eSKrzysztof Błaszkowski infp->vsi_stilist = vxfs_blkiget(sbp, infp->vsi_iext,
1290d83f7fcSKrzysztof Błaszkowski fs32_to_cpu(infp, sfp->fsh_ilistino[0]));
1301da177e4SLinus Torvalds if (!infp->vsi_stilist) {
131552c0348SCliff Wickman printk(KERN_ERR "vxfs: unable to get structural list inode\n");
1321da177e4SLinus Torvalds goto out_free_pfp;
1331da177e4SLinus Torvalds }
1341da177e4SLinus Torvalds if (!VXFS_ISILT(VXFS_INO(infp->vsi_stilist))) {
13525985edcSLucas De Marchi printk(KERN_ERR "vxfs: structural list inode is of wrong type (%x)\n",
1361da177e4SLinus Torvalds VXFS_INO(infp->vsi_stilist)->vii_mode & VXFS_TYPE_MASK);
1371da177e4SLinus Torvalds goto out_iput_stilist;
1381da177e4SLinus Torvalds }
1391da177e4SLinus Torvalds
1408985f53eSKrzysztof Błaszkowski infp->vsi_ilist = vxfs_stiget(sbp, fs32_to_cpu(infp, pfp->fsh_ilistino[0]));
1411da177e4SLinus Torvalds if (!infp->vsi_ilist) {
142552c0348SCliff Wickman printk(KERN_ERR "vxfs: unable to get inode list inode\n");
1431da177e4SLinus Torvalds goto out_iput_stilist;
1441da177e4SLinus Torvalds }
1451da177e4SLinus Torvalds if (!VXFS_ISILT(VXFS_INO(infp->vsi_ilist))) {
1461da177e4SLinus Torvalds printk(KERN_ERR "vxfs: inode list inode is of wrong type (%x)\n",
1471da177e4SLinus Torvalds VXFS_INO(infp->vsi_ilist)->vii_mode & VXFS_TYPE_MASK);
1481da177e4SLinus Torvalds goto out_iput_ilist;
1491da177e4SLinus Torvalds }
1501da177e4SLinus Torvalds
151263040a1SKrzysztof Błaszkowski kfree(pfp);
152263040a1SKrzysztof Błaszkowski kfree(sfp);
1531da177e4SLinus Torvalds return 0;
1541da177e4SLinus Torvalds
1551da177e4SLinus Torvalds out_iput_ilist:
1561da177e4SLinus Torvalds iput(infp->vsi_ilist);
1571da177e4SLinus Torvalds out_iput_stilist:
1581da177e4SLinus Torvalds iput(infp->vsi_stilist);
1591da177e4SLinus Torvalds out_free_pfp:
1601da177e4SLinus Torvalds kfree(pfp);
1611da177e4SLinus Torvalds out_free_sfp:
1621da177e4SLinus Torvalds kfree(sfp);
1631da177e4SLinus Torvalds out_iput_fship:
1641da177e4SLinus Torvalds iput(infp->vsi_fship);
1651da177e4SLinus Torvalds return -EINVAL;
1661da177e4SLinus Torvalds }
167