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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (c) 2000-2001 Christoph Hellwig.4 * Copyright (c) 2016 Krzysztof Blaszkowski5 */6 7/*8 * Veritas filesystem driver - fileset header routines.9 */10#include <linux/fs.h>11#include <linux/buffer_head.h>12#include <linux/kernel.h>13#include <linux/slab.h>14#include <linux/string.h>15 16#include "vxfs.h"17#include "vxfs_inode.h"18#include "vxfs_extern.h"19#include "vxfs_fshead.h"20 21 22#ifdef DIAGNOSTIC23static void24vxfs_dumpfsh(struct vxfs_fsh *fhp)25{26 printk("\n\ndumping fileset header:\n");27 printk("----------------------------\n");28 printk("version: %u\n", fhp->fsh_version);29 printk("fsindex: %u\n", fhp->fsh_fsindex);30 printk("iauino: %u\tninodes:%u\n",31 fhp->fsh_iauino, fhp->fsh_ninodes);32 printk("maxinode: %u\tlctino: %u\n",33 fhp->fsh_maxinode, fhp->fsh_lctino);34 printk("nau: %u\n", fhp->fsh_nau);35 printk("ilistino[0]: %u\tilistino[1]: %u\n",36 fhp->fsh_ilistino[0], fhp->fsh_ilistino[1]);37}38#endif39 40/**41 * vxfs_getfsh - read fileset header into memory42 * @ip: the (fake) fileset header inode43 * @which: 0 for the structural, 1 for the primary fsh.44 *45 * Description:46 * vxfs_getfsh reads either the structural or primary fileset header47 * described by @ip into memory.48 *49 * Returns:50 * The fileset header structure on success, else Zero.51 */52static struct vxfs_fsh *53vxfs_getfsh(struct inode *ip, int which)54{55 struct buffer_head *bp;56 57 bp = vxfs_bread(ip, which);58 if (bp) {59 struct vxfs_fsh *fhp;60 61 if (!(fhp = kmalloc(sizeof(*fhp), GFP_KERNEL)))62 goto out;63 memcpy(fhp, bp->b_data, sizeof(*fhp));64 65 put_bh(bp);66 return (fhp);67 }68out:69 brelse(bp);70 return NULL;71}72 73/**74 * vxfs_read_fshead - read the fileset headers75 * @sbp: superblock to which the fileset belongs76 *77 * Description:78 * vxfs_read_fshead will fill the inode and structural inode list in @sb.79 *80 * Returns:81 * Zero on success, else a negative error code (-EINVAL).82 */83int84vxfs_read_fshead(struct super_block *sbp)85{86 struct vxfs_sb_info *infp = VXFS_SBI(sbp);87 struct vxfs_fsh *pfp, *sfp;88 struct vxfs_inode_info *vip;89 90 infp->vsi_fship = vxfs_blkiget(sbp, infp->vsi_iext, infp->vsi_fshino);91 if (!infp->vsi_fship) {92 printk(KERN_ERR "vxfs: unable to read fsh inode\n");93 return -EINVAL;94 }95 96 vip = VXFS_INO(infp->vsi_fship);97 if (!VXFS_ISFSH(vip)) {98 printk(KERN_ERR "vxfs: fsh list inode is of wrong type (%x)\n",99 vip->vii_mode & VXFS_TYPE_MASK); 100 goto out_iput_fship;101 }102 103#ifdef DIAGNOSTIC104 printk("vxfs: fsh inode dump:\n");105 vxfs_dumpi(vip, infp->vsi_fshino);106#endif107 108 sfp = vxfs_getfsh(infp->vsi_fship, 0);109 if (!sfp) {110 printk(KERN_ERR "vxfs: unable to get structural fsh\n");111 goto out_iput_fship;112 } 113 114#ifdef DIAGNOSTIC115 vxfs_dumpfsh(sfp);116#endif117 118 pfp = vxfs_getfsh(infp->vsi_fship, 1);119 if (!pfp) {120 printk(KERN_ERR "vxfs: unable to get primary fsh\n");121 goto out_free_sfp;122 }123 124#ifdef DIAGNOSTIC125 vxfs_dumpfsh(pfp);126#endif127 128 infp->vsi_stilist = vxfs_blkiget(sbp, infp->vsi_iext,129 fs32_to_cpu(infp, sfp->fsh_ilistino[0]));130 if (!infp->vsi_stilist) {131 printk(KERN_ERR "vxfs: unable to get structural list inode\n");132 goto out_free_pfp;133 }134 if (!VXFS_ISILT(VXFS_INO(infp->vsi_stilist))) {135 printk(KERN_ERR "vxfs: structural list inode is of wrong type (%x)\n",136 VXFS_INO(infp->vsi_stilist)->vii_mode & VXFS_TYPE_MASK); 137 goto out_iput_stilist;138 }139 140 infp->vsi_ilist = vxfs_stiget(sbp, fs32_to_cpu(infp, pfp->fsh_ilistino[0]));141 if (!infp->vsi_ilist) {142 printk(KERN_ERR "vxfs: unable to get inode list inode\n");143 goto out_iput_stilist;144 }145 if (!VXFS_ISILT(VXFS_INO(infp->vsi_ilist))) {146 printk(KERN_ERR "vxfs: inode list inode is of wrong type (%x)\n",147 VXFS_INO(infp->vsi_ilist)->vii_mode & VXFS_TYPE_MASK);148 goto out_iput_ilist;149 }150 151 kfree(pfp);152 kfree(sfp);153 return 0;154 155 out_iput_ilist:156 iput(infp->vsi_ilist);157 out_iput_stilist:158 iput(infp->vsi_stilist);159 out_free_pfp:160 kfree(pfp);161 out_free_sfp:162 kfree(sfp);163 out_iput_fship:164 iput(infp->vsi_fship);165 return -EINVAL;166}167