LCOV - code coverage report
Current view: top level - fs/isofs - inode.c (source / functions) Hit Total Coverage
Test: landlock.info Lines: 8 775 1.0 %
Date: 2021-04-22 12:43:58 Functions: 2 37 5.4 %

          Line data    Source code
       1             : // SPDX-License-Identifier: GPL-2.0-only
       2             : /*
       3             :  *  linux/fs/isofs/inode.c
       4             :  *
       5             :  *  (C) 1991  Linus Torvalds - minix filesystem
       6             :  *      1992, 1993, 1994  Eric Youngdale Modified for ISO 9660 filesystem.
       7             :  *      1994  Eberhard Mönkeberg - multi session handling.
       8             :  *      1995  Mark Dobie - allow mounting of some weird VideoCDs and PhotoCDs.
       9             :  *      1997  Gordon Chaffee - Joliet CDs
      10             :  *      1998  Eric Lammerts - ISO 9660 Level 3
      11             :  *      2004  Paul Serice - Inode Support pushed out from 4GB to 128GB
      12             :  *      2004  Paul Serice - NFS Export Operations
      13             :  */
      14             : 
      15             : #include <linux/init.h>
      16             : #include <linux/module.h>
      17             : 
      18             : #include <linux/slab.h>
      19             : #include <linux/cred.h>
      20             : #include <linux/nls.h>
      21             : #include <linux/ctype.h>
      22             : #include <linux/statfs.h>
      23             : #include <linux/cdrom.h>
      24             : #include <linux/parser.h>
      25             : #include <linux/mpage.h>
      26             : #include <linux/user_namespace.h>
      27             : #include <linux/seq_file.h>
      28             : #include <linux/blkdev.h>
      29             : 
      30             : #include "isofs.h"
      31             : #include "zisofs.h"
      32             : 
      33             : /* max tz offset is 13 hours */
      34             : #define MAX_TZ_OFFSET (52*15*60)
      35             : 
      36             : #define BEQUIET
      37             : 
      38             : static int isofs_hashi(const struct dentry *parent, struct qstr *qstr);
      39             : static int isofs_dentry_cmpi(const struct dentry *dentry,
      40             :                 unsigned int len, const char *str, const struct qstr *name);
      41             : 
      42             : #ifdef CONFIG_JOLIET
      43             : static int isofs_hashi_ms(const struct dentry *parent, struct qstr *qstr);
      44             : static int isofs_hash_ms(const struct dentry *parent, struct qstr *qstr);
      45             : static int isofs_dentry_cmpi_ms(const struct dentry *dentry,
      46             :                 unsigned int len, const char *str, const struct qstr *name);
      47             : static int isofs_dentry_cmp_ms(const struct dentry *dentry,
      48             :                 unsigned int len, const char *str, const struct qstr *name);
      49             : #endif
      50             : 
      51           0 : static void isofs_put_super(struct super_block *sb)
      52             : {
      53           0 :         struct isofs_sb_info *sbi = ISOFS_SB(sb);
      54             : 
      55             : #ifdef CONFIG_JOLIET
      56           0 :         unload_nls(sbi->s_nls_iocharset);
      57             : #endif
      58             : 
      59           0 :         kfree(sbi);
      60           0 :         sb->s_fs_info = NULL;
      61           0 :         return;
      62             : }
      63             : 
      64             : static int isofs_read_inode(struct inode *, int relocated);
      65             : static int isofs_statfs (struct dentry *, struct kstatfs *);
      66             : static int isofs_show_options(struct seq_file *, struct dentry *);
      67             : 
      68             : static struct kmem_cache *isofs_inode_cachep;
      69             : 
      70           0 : static struct inode *isofs_alloc_inode(struct super_block *sb)
      71             : {
      72           0 :         struct iso_inode_info *ei;
      73           0 :         ei = kmem_cache_alloc(isofs_inode_cachep, GFP_KERNEL);
      74           0 :         if (!ei)
      75             :                 return NULL;
      76           0 :         return &ei->vfs_inode;
      77             : }
      78             : 
      79           0 : static void isofs_free_inode(struct inode *inode)
      80             : {
      81           0 :         kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode));
      82           0 : }
      83             : 
      84           0 : static void init_once(void *foo)
      85             : {
      86           0 :         struct iso_inode_info *ei = foo;
      87             : 
      88           0 :         inode_init_once(&ei->vfs_inode);
      89           0 : }
      90             : 
      91           1 : static int __init init_inodecache(void)
      92             : {
      93           1 :         isofs_inode_cachep = kmem_cache_create("isofs_inode_cache",
      94             :                                         sizeof(struct iso_inode_info),
      95             :                                         0, (SLAB_RECLAIM_ACCOUNT|
      96             :                                         SLAB_MEM_SPREAD|SLAB_ACCOUNT),
      97             :                                         init_once);
      98           1 :         if (!isofs_inode_cachep)
      99           0 :                 return -ENOMEM;
     100             :         return 0;
     101             : }
     102             : 
     103           0 : static void destroy_inodecache(void)
     104             : {
     105             :         /*
     106             :          * Make sure all delayed rcu free inodes are flushed before we
     107             :          * destroy cache.
     108             :          */
     109           0 :         rcu_barrier();
     110           0 :         kmem_cache_destroy(isofs_inode_cachep);
     111           0 : }
     112             : 
     113           0 : static int isofs_remount(struct super_block *sb, int *flags, char *data)
     114             : {
     115           0 :         sync_filesystem(sb);
     116           0 :         if (!(*flags & SB_RDONLY))
     117           0 :                 return -EROFS;
     118             :         return 0;
     119             : }
     120             : 
     121             : static const struct super_operations isofs_sops = {
     122             :         .alloc_inode    = isofs_alloc_inode,
     123             :         .free_inode     = isofs_free_inode,
     124             :         .put_super      = isofs_put_super,
     125             :         .statfs         = isofs_statfs,
     126             :         .remount_fs     = isofs_remount,
     127             :         .show_options   = isofs_show_options,
     128             : };
     129             : 
     130             : 
     131             : static const struct dentry_operations isofs_dentry_ops[] = {
     132             :         {
     133             :                 .d_hash         = isofs_hashi,
     134             :                 .d_compare      = isofs_dentry_cmpi,
     135             :         },
     136             : #ifdef CONFIG_JOLIET
     137             :         {
     138             :                 .d_hash         = isofs_hash_ms,
     139             :                 .d_compare      = isofs_dentry_cmp_ms,
     140             :         },
     141             :         {
     142             :                 .d_hash         = isofs_hashi_ms,
     143             :                 .d_compare      = isofs_dentry_cmpi_ms,
     144             :         },
     145             : #endif
     146             : };
     147             : 
     148             : struct iso9660_options{
     149             :         unsigned int rock:1;
     150             :         unsigned int joliet:1;
     151             :         unsigned int cruft:1;
     152             :         unsigned int hide:1;
     153             :         unsigned int showassoc:1;
     154             :         unsigned int nocompress:1;
     155             :         unsigned int overriderockperm:1;
     156             :         unsigned int uid_set:1;
     157             :         unsigned int gid_set:1;
     158             :         unsigned int utf8:1;
     159             :         unsigned char map;
     160             :         unsigned char check;
     161             :         unsigned int blocksize;
     162             :         umode_t fmode;
     163             :         umode_t dmode;
     164             :         kgid_t gid;
     165             :         kuid_t uid;
     166             :         char *iocharset;
     167             :         /* LVE */
     168             :         s32 session;
     169             :         s32 sbsector;
     170             : };
     171             : 
     172             : /*
     173             :  * Compute the hash for the isofs name corresponding to the dentry.
     174             :  */
     175             : static int
     176           0 : isofs_hashi_common(const struct dentry *dentry, struct qstr *qstr, int ms)
     177             : {
     178           0 :         const char *name;
     179           0 :         int len;
     180           0 :         char c;
     181           0 :         unsigned long hash;
     182             : 
     183           0 :         len = qstr->len;
     184           0 :         name = qstr->name;
     185           0 :         if (ms) {
     186           0 :                 while (len && name[len-1] == '.')
     187             :                         len--;
     188             :         }
     189             : 
     190           0 :         hash = init_name_hash(dentry);
     191           0 :         while (len--) {
     192           0 :                 c = tolower(*name++);
     193           0 :                 hash = partial_name_hash(c, hash);
     194             :         }
     195           0 :         qstr->hash = end_name_hash(hash);
     196             : 
     197           0 :         return 0;
     198             : }
     199             : 
     200             : /*
     201             :  * Compare of two isofs names.
     202             :  */
     203           0 : static int isofs_dentry_cmp_common(
     204             :                 unsigned int len, const char *str,
     205             :                 const struct qstr *name, int ms, int ci)
     206             : {
     207           0 :         int alen, blen;
     208             : 
     209             :         /* A filename cannot end in '.' or we treat it like it has none */
     210           0 :         alen = name->len;
     211           0 :         blen = len;
     212           0 :         if (ms) {
     213           0 :                 while (alen && name->name[alen-1] == '.')
     214             :                         alen--;
     215           0 :                 while (blen && str[blen-1] == '.')
     216             :                         blen--;
     217             :         }
     218           0 :         if (alen == blen) {
     219           0 :                 if (ci) {
     220           0 :                         if (strncasecmp(name->name, str, alen) == 0)
     221           0 :                                 return 0;
     222             :                 } else {
     223           0 :                         if (strncmp(name->name, str, alen) == 0)
     224           0 :                                 return 0;
     225             :                 }
     226             :         }
     227             :         return 1;
     228             : }
     229             : 
     230             : static int
     231           0 : isofs_hashi(const struct dentry *dentry, struct qstr *qstr)
     232             : {
     233           0 :         return isofs_hashi_common(dentry, qstr, 0);
     234             : }
     235             : 
     236             : static int
     237           0 : isofs_dentry_cmpi(const struct dentry *dentry,
     238             :                 unsigned int len, const char *str, const struct qstr *name)
     239             : {
     240           0 :         return isofs_dentry_cmp_common(len, str, name, 0, 1);
     241             : }
     242             : 
     243             : #ifdef CONFIG_JOLIET
     244             : /*
     245             :  * Compute the hash for the isofs name corresponding to the dentry.
     246             :  */
     247             : static int
     248           0 : isofs_hash_common(const struct dentry *dentry, struct qstr *qstr, int ms)
     249             : {
     250           0 :         const char *name;
     251           0 :         int len;
     252             : 
     253           0 :         len = qstr->len;
     254           0 :         name = qstr->name;
     255           0 :         if (ms) {
     256           0 :                 while (len && name[len-1] == '.')
     257             :                         len--;
     258             :         }
     259             : 
     260           0 :         qstr->hash = full_name_hash(dentry, name, len);
     261             : 
     262           0 :         return 0;
     263             : }
     264             : 
     265             : static int
     266           0 : isofs_hash_ms(const struct dentry *dentry, struct qstr *qstr)
     267             : {
     268           0 :         return isofs_hash_common(dentry, qstr, 1);
     269             : }
     270             : 
     271             : static int
     272           0 : isofs_hashi_ms(const struct dentry *dentry, struct qstr *qstr)
     273             : {
     274           0 :         return isofs_hashi_common(dentry, qstr, 1);
     275             : }
     276             : 
     277             : static int
     278           0 : isofs_dentry_cmp_ms(const struct dentry *dentry,
     279             :                 unsigned int len, const char *str, const struct qstr *name)
     280             : {
     281           0 :         return isofs_dentry_cmp_common(len, str, name, 1, 0);
     282             : }
     283             : 
     284             : static int
     285           0 : isofs_dentry_cmpi_ms(const struct dentry *dentry,
     286             :                 unsigned int len, const char *str, const struct qstr *name)
     287             : {
     288           0 :         return isofs_dentry_cmp_common(len, str, name, 1, 1);
     289             : }
     290             : #endif
     291             : 
     292             : enum {
     293             :         Opt_block, Opt_check_r, Opt_check_s, Opt_cruft, Opt_gid, Opt_ignore,
     294             :         Opt_iocharset, Opt_map_a, Opt_map_n, Opt_map_o, Opt_mode, Opt_nojoliet,
     295             :         Opt_norock, Opt_sb, Opt_session, Opt_uid, Opt_unhide, Opt_utf8, Opt_err,
     296             :         Opt_nocompress, Opt_hide, Opt_showassoc, Opt_dmode, Opt_overriderockperm,
     297             : };
     298             : 
     299             : static const match_table_t tokens = {
     300             :         {Opt_norock, "norock"},
     301             :         {Opt_nojoliet, "nojoliet"},
     302             :         {Opt_unhide, "unhide"},
     303             :         {Opt_hide, "hide"},
     304             :         {Opt_showassoc, "showassoc"},
     305             :         {Opt_cruft, "cruft"},
     306             :         {Opt_utf8, "utf8"},
     307             :         {Opt_iocharset, "iocharset=%s"},
     308             :         {Opt_map_a, "map=acorn"},
     309             :         {Opt_map_a, "map=a"},
     310             :         {Opt_map_n, "map=normal"},
     311             :         {Opt_map_n, "map=n"},
     312             :         {Opt_map_o, "map=off"},
     313             :         {Opt_map_o, "map=o"},
     314             :         {Opt_session, "session=%u"},
     315             :         {Opt_sb, "sbsector=%u"},
     316             :         {Opt_check_r, "check=relaxed"},
     317             :         {Opt_check_r, "check=r"},
     318             :         {Opt_check_s, "check=strict"},
     319             :         {Opt_check_s, "check=s"},
     320             :         {Opt_uid, "uid=%u"},
     321             :         {Opt_gid, "gid=%u"},
     322             :         {Opt_mode, "mode=%u"},
     323             :         {Opt_dmode, "dmode=%u"},
     324             :         {Opt_overriderockperm, "overriderockperm"},
     325             :         {Opt_block, "block=%u"},
     326             :         {Opt_ignore, "conv=binary"},
     327             :         {Opt_ignore, "conv=b"},
     328             :         {Opt_ignore, "conv=text"},
     329             :         {Opt_ignore, "conv=t"},
     330             :         {Opt_ignore, "conv=mtext"},
     331             :         {Opt_ignore, "conv=m"},
     332             :         {Opt_ignore, "conv=auto"},
     333             :         {Opt_ignore, "conv=a"},
     334             :         {Opt_nocompress, "nocompress"},
     335             :         {Opt_err, NULL}
     336             : };
     337             : 
     338           0 : static int parse_options(char *options, struct iso9660_options *popt)
     339             : {
     340           0 :         char *p;
     341           0 :         int option;
     342           0 :         unsigned int uv;
     343             : 
     344           0 :         popt->map = 'n';
     345           0 :         popt->rock = 1;
     346           0 :         popt->joliet = 1;
     347           0 :         popt->cruft = 0;
     348           0 :         popt->hide = 0;
     349           0 :         popt->showassoc = 0;
     350           0 :         popt->check = 'u';           /* unset */
     351           0 :         popt->nocompress = 0;
     352           0 :         popt->blocksize = 1024;
     353           0 :         popt->fmode = popt->dmode = ISOFS_INVALID_MODE;
     354           0 :         popt->uid_set = 0;
     355           0 :         popt->gid_set = 0;
     356           0 :         popt->gid = GLOBAL_ROOT_GID;
     357           0 :         popt->uid = GLOBAL_ROOT_UID;
     358           0 :         popt->iocharset = NULL;
     359           0 :         popt->utf8 = 0;
     360           0 :         popt->overriderockperm = 0;
     361           0 :         popt->session=-1;
     362           0 :         popt->sbsector=-1;
     363           0 :         if (!options)
     364             :                 return 1;
     365             : 
     366           0 :         while ((p = strsep(&options, ",")) != NULL) {
     367           0 :                 int token;
     368           0 :                 substring_t args[MAX_OPT_ARGS];
     369           0 :                 unsigned n;
     370             : 
     371           0 :                 if (!*p)
     372           0 :                         continue;
     373             : 
     374           0 :                 token = match_token(p, tokens, args);
     375           0 :                 switch (token) {
     376           0 :                 case Opt_norock:
     377           0 :                         popt->rock = 0;
     378           0 :                         break;
     379           0 :                 case Opt_nojoliet:
     380           0 :                         popt->joliet = 0;
     381           0 :                         break;
     382           0 :                 case Opt_hide:
     383           0 :                         popt->hide = 1;
     384           0 :                         break;
     385           0 :                 case Opt_unhide:
     386             :                 case Opt_showassoc:
     387           0 :                         popt->showassoc = 1;
     388           0 :                         break;
     389           0 :                 case Opt_cruft:
     390           0 :                         popt->cruft = 1;
     391           0 :                         break;
     392           0 :                 case Opt_utf8:
     393           0 :                         popt->utf8 = 1;
     394           0 :                         break;
     395             : #ifdef CONFIG_JOLIET
     396           0 :                 case Opt_iocharset:
     397           0 :                         kfree(popt->iocharset);
     398           0 :                         popt->iocharset = match_strdup(&args[0]);
     399           0 :                         if (!popt->iocharset)
     400           0 :                                 return 0;
     401             :                         break;
     402             : #endif
     403           0 :                 case Opt_map_a:
     404           0 :                         popt->map = 'a';
     405           0 :                         break;
     406           0 :                 case Opt_map_o:
     407           0 :                         popt->map = 'o';
     408           0 :                         break;
     409           0 :                 case Opt_map_n:
     410           0 :                         popt->map = 'n';
     411           0 :                         break;
     412           0 :                 case Opt_session:
     413           0 :                         if (match_int(&args[0], &option))
     414             :                                 return 0;
     415           0 :                         n = option;
     416             :                         /*
     417             :                          * Track numbers are supposed to be in range 1-99, the
     418             :                          * mount option starts indexing at 0.
     419             :                          */
     420           0 :                         if (n >= 99)
     421             :                                 return 0;
     422           0 :                         popt->session = n + 1;
     423           0 :                         break;
     424           0 :                 case Opt_sb:
     425           0 :                         if (match_int(&args[0], &option))
     426             :                                 return 0;
     427           0 :                         popt->sbsector = option;
     428           0 :                         break;
     429           0 :                 case Opt_check_r:
     430           0 :                         popt->check = 'r';
     431           0 :                         break;
     432           0 :                 case Opt_check_s:
     433           0 :                         popt->check = 's';
     434           0 :                         break;
     435             :                 case Opt_ignore:
     436             :                         break;
     437           0 :                 case Opt_uid:
     438           0 :                         if (match_uint(&args[0], &uv))
     439             :                                 return 0;
     440           0 :                         popt->uid = make_kuid(current_user_ns(), uv);
     441           0 :                         if (!uid_valid(popt->uid))
     442             :                                 return 0;
     443           0 :                         popt->uid_set = 1;
     444           0 :                         break;
     445           0 :                 case Opt_gid:
     446           0 :                         if (match_uint(&args[0], &uv))
     447             :                                 return 0;
     448           0 :                         popt->gid = make_kgid(current_user_ns(), uv);
     449           0 :                         if (!gid_valid(popt->gid))
     450             :                                 return 0;
     451           0 :                         popt->gid_set = 1;
     452           0 :                         break;
     453           0 :                 case Opt_mode:
     454           0 :                         if (match_int(&args[0], &option))
     455             :                                 return 0;
     456           0 :                         popt->fmode = option;
     457           0 :                         break;
     458           0 :                 case Opt_dmode:
     459           0 :                         if (match_int(&args[0], &option))
     460             :                                 return 0;
     461           0 :                         popt->dmode = option;
     462           0 :                         break;
     463           0 :                 case Opt_overriderockperm:
     464           0 :                         popt->overriderockperm = 1;
     465           0 :                         break;
     466           0 :                 case Opt_block:
     467           0 :                         if (match_int(&args[0], &option))
     468             :                                 return 0;
     469           0 :                         n = option;
     470           0 :                         if (n != 512 && n != 1024 && n != 2048)
     471             :                                 return 0;
     472           0 :                         popt->blocksize = n;
     473           0 :                         break;
     474           0 :                 case Opt_nocompress:
     475           0 :                         popt->nocompress = 1;
     476           0 :                         break;
     477             :                 default:
     478             :                         return 0;
     479             :                 }
     480             :         }
     481             :         return 1;
     482             : }
     483             : 
     484             : /*
     485             :  * Display the mount options in /proc/mounts.
     486             :  */
     487           0 : static int isofs_show_options(struct seq_file *m, struct dentry *root)
     488             : {
     489           0 :         struct isofs_sb_info *sbi = ISOFS_SB(root->d_sb);
     490             : 
     491           0 :         if (!sbi->s_rock)            seq_puts(m, ",norock");
     492           0 :         else if (!sbi->s_joliet_level)       seq_puts(m, ",nojoliet");
     493           0 :         if (sbi->s_cruft)            seq_puts(m, ",cruft");
     494           0 :         if (sbi->s_hide)             seq_puts(m, ",hide");
     495           0 :         if (sbi->s_nocompress)               seq_puts(m, ",nocompress");
     496           0 :         if (sbi->s_overriderockperm) seq_puts(m, ",overriderockperm");
     497           0 :         if (sbi->s_showassoc)                seq_puts(m, ",showassoc");
     498           0 :         if (sbi->s_utf8)             seq_puts(m, ",utf8");
     499             : 
     500           0 :         if (sbi->s_check)            seq_printf(m, ",check=%c", sbi->s_check);
     501           0 :         if (sbi->s_mapping)          seq_printf(m, ",map=%c", sbi->s_mapping);
     502           0 :         if (sbi->s_session != 255)   seq_printf(m, ",session=%u", sbi->s_session - 1);
     503           0 :         if (sbi->s_sbsector != -1)   seq_printf(m, ",sbsector=%u", sbi->s_sbsector);
     504             : 
     505           0 :         if (root->d_sb->s_blocksize != 1024)
     506           0 :                 seq_printf(m, ",blocksize=%lu", root->d_sb->s_blocksize);
     507             : 
     508           0 :         if (sbi->s_uid_set)
     509           0 :                 seq_printf(m, ",uid=%u",
     510             :                            from_kuid_munged(&init_user_ns, sbi->s_uid));
     511           0 :         if (sbi->s_gid_set)
     512           0 :                 seq_printf(m, ",gid=%u",
     513             :                            from_kgid_munged(&init_user_ns, sbi->s_gid));
     514             : 
     515           0 :         if (sbi->s_dmode != ISOFS_INVALID_MODE)
     516           0 :                 seq_printf(m, ",dmode=%o", sbi->s_dmode);
     517           0 :         if (sbi->s_fmode != ISOFS_INVALID_MODE)
     518           0 :                 seq_printf(m, ",fmode=%o", sbi->s_fmode);
     519             : 
     520             : #ifdef CONFIG_JOLIET
     521           0 :         if (sbi->s_nls_iocharset &&
     522           0 :             strcmp(sbi->s_nls_iocharset->charset, CONFIG_NLS_DEFAULT) != 0)
     523           0 :                 seq_printf(m, ",iocharset=%s", sbi->s_nls_iocharset->charset);
     524             : #endif
     525           0 :         return 0;
     526             : }
     527             : 
     528             : /*
     529             :  * look if the driver can tell the multi session redirection value
     530             :  *
     531             :  * don't change this if you don't know what you do, please!
     532             :  * Multisession is legal only with XA disks.
     533             :  * A non-XA disk with more than one volume descriptor may do it right, but
     534             :  * usually is written in a nowhere standardized "multi-partition" manner.
     535             :  * Multisession uses absolute addressing (solely the first frame of the whole
     536             :  * track is #0), multi-partition uses relative addressing (each first frame of
     537             :  * each track is #0), and a track is not a session.
     538             :  *
     539             :  * A broken CDwriter software or drive firmware does not set new standards,
     540             :  * at least not if conflicting with the existing ones.
     541             :  *
     542             :  * emoenke@gwdg.de
     543             :  */
     544             : #define WE_OBEY_THE_WRITTEN_STANDARDS 1
     545             : 
     546           0 : static unsigned int isofs_get_last_session(struct super_block *sb, s32 session)
     547             : {
     548           0 :         struct cdrom_device_info *cdi = disk_to_cdi(sb->s_bdev->bd_disk);
     549           0 :         unsigned int vol_desc_start = 0;
     550             : 
     551           0 :         if (session > 0) {
     552           0 :                 struct cdrom_tocentry te;
     553             : 
     554           0 :                 if (!cdi)
     555           0 :                         return 0;
     556             : 
     557           0 :                 te.cdte_track = session;
     558           0 :                 te.cdte_format = CDROM_LBA;
     559           0 :                 if (cdrom_read_tocentry(cdi, &te) == 0) {
     560           0 :                         printk(KERN_DEBUG "ISOFS: Session %d start %d type %d\n",
     561             :                                 session, te.cdte_addr.lba,
     562           0 :                                 te.cdte_ctrl & CDROM_DATA_TRACK);
     563           0 :                         if ((te.cdte_ctrl & CDROM_DATA_TRACK) == 4)
     564           0 :                                 return te.cdte_addr.lba;
     565             :                 }
     566             : 
     567           0 :                 printk(KERN_ERR "ISOFS: Invalid session number or type of track\n");
     568             :         }
     569             : 
     570           0 :         if (cdi) {
     571           0 :                 struct cdrom_multisession ms_info;
     572             : 
     573           0 :                 ms_info.addr_format = CDROM_LBA;
     574           0 :                 if (cdrom_multisession(cdi, &ms_info) == 0) {
     575             : #if WE_OBEY_THE_WRITTEN_STANDARDS
     576             :                         /* necessary for a valid ms_info.addr */
     577           0 :                         if (ms_info.xa_flag)
     578             : #endif
     579           0 :                                 vol_desc_start = ms_info.addr.lba;
     580             :                 }
     581             :         }
     582             : 
     583             :         return vol_desc_start;
     584             : }
     585             : 
     586             : /*
     587             :  * Check if root directory is empty (has less than 3 files).
     588             :  *
     589             :  * Used to detect broken CDs where ISO root directory is empty but Joliet root
     590             :  * directory is OK. If such CD has Rock Ridge extensions, they will be disabled
     591             :  * (and Joliet used instead) or else no files would be visible.
     592             :  */
     593           0 : static bool rootdir_empty(struct super_block *sb, unsigned long block)
     594             : {
     595           0 :         int offset = 0, files = 0, de_len;
     596           0 :         struct iso_directory_record *de;
     597           0 :         struct buffer_head *bh;
     598             : 
     599           0 :         bh = sb_bread(sb, block);
     600           0 :         if (!bh)
     601             :                 return true;
     602           0 :         while (files < 3) {
     603           0 :                 de = (struct iso_directory_record *) (bh->b_data + offset);
     604           0 :                 de_len = *(unsigned char *) de;
     605           0 :                 if (de_len == 0)
     606             :                         break;
     607           0 :                 files++;
     608           0 :                 offset += de_len;
     609             :         }
     610           0 :         brelse(bh);
     611           0 :         return files < 3;
     612             : }
     613             : 
     614             : /*
     615             :  * Initialize the superblock and read the root inode.
     616             :  */
     617           0 : static int isofs_fill_super(struct super_block *s, void *data, int silent)
     618             : {
     619           0 :         struct buffer_head *bh = NULL, *pri_bh = NULL;
     620           0 :         struct hs_primary_descriptor *h_pri = NULL;
     621           0 :         struct iso_primary_descriptor *pri = NULL;
     622           0 :         struct iso_supplementary_descriptor *sec = NULL;
     623           0 :         struct iso_directory_record *rootp;
     624           0 :         struct inode *inode;
     625           0 :         struct iso9660_options opt;
     626           0 :         struct isofs_sb_info *sbi;
     627           0 :         unsigned long first_data_zone;
     628           0 :         int joliet_level = 0;
     629           0 :         int iso_blknum, block;
     630           0 :         int orig_zonesize;
     631           0 :         int table, error = -EINVAL;
     632           0 :         unsigned int vol_desc_start;
     633             : 
     634           0 :         sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
     635           0 :         if (!sbi)
     636             :                 return -ENOMEM;
     637           0 :         s->s_fs_info = sbi;
     638             : 
     639           0 :         if (!parse_options((char *)data, &opt))
     640           0 :                 goto out_freesbi;
     641             : 
     642             :         /*
     643             :          * First of all, get the hardware blocksize for this device.
     644             :          * If we don't know what it is, or the hardware blocksize is
     645             :          * larger than the blocksize the user specified, then use
     646             :          * that value.
     647             :          */
     648             :         /*
     649             :          * What if bugger tells us to go beyond page size?
     650             :          */
     651           0 :         if (bdev_logical_block_size(s->s_bdev) > 2048) {
     652           0 :                 printk(KERN_WARNING
     653             :                        "ISOFS: unsupported/invalid hardware sector size %d\n",
     654             :                         bdev_logical_block_size(s->s_bdev));
     655           0 :                 goto out_freesbi;
     656             :         }
     657           0 :         opt.blocksize = sb_min_blocksize(s, opt.blocksize);
     658             : 
     659           0 :         sbi->s_high_sierra = 0; /* default is iso9660 */
     660           0 :         sbi->s_session = opt.session;
     661           0 :         sbi->s_sbsector = opt.sbsector;
     662             : 
     663           0 :         vol_desc_start = (opt.sbsector != -1) ?
     664           0 :                 opt.sbsector : isofs_get_last_session(s,opt.session);
     665             : 
     666           0 :         for (iso_blknum = vol_desc_start+16;
     667           0 :                 iso_blknum < vol_desc_start+100; iso_blknum++) {
     668           0 :                 struct hs_volume_descriptor *hdp;
     669           0 :                 struct iso_volume_descriptor  *vdp;
     670             : 
     671           0 :                 block = iso_blknum << (ISOFS_BLOCK_BITS - s->s_blocksize_bits);
     672           0 :                 if (!(bh = sb_bread(s, block)))
     673           0 :                         goto out_no_read;
     674             : 
     675           0 :                 vdp = (struct iso_volume_descriptor *)bh->b_data;
     676           0 :                 hdp = (struct hs_volume_descriptor *)bh->b_data;
     677             : 
     678             :                 /*
     679             :                  * Due to the overlapping physical location of the descriptors,
     680             :                  * ISO CDs can match hdp->id==HS_STANDARD_ID as well. To ensure
     681             :                  * proper identification in this case, we first check for ISO.
     682             :                  */
     683           0 :                 if (strncmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) == 0) {
     684           0 :                         if (isonum_711(vdp->type) == ISO_VD_END)
     685             :                                 break;
     686           0 :                         if (isonum_711(vdp->type) == ISO_VD_PRIMARY) {
     687           0 :                                 if (!pri) {
     688           0 :                                         pri = (struct iso_primary_descriptor *)vdp;
     689             :                                         /* Save the buffer in case we need it ... */
     690           0 :                                         pri_bh = bh;
     691           0 :                                         bh = NULL;
     692             :                                 }
     693             :                         }
     694             : #ifdef CONFIG_JOLIET
     695           0 :                         else if (isonum_711(vdp->type) == ISO_VD_SUPPLEMENTARY) {
     696           0 :                                 sec = (struct iso_supplementary_descriptor *)vdp;
     697           0 :                                 if (sec->escape[0] == 0x25 && sec->escape[1] == 0x2f) {
     698           0 :                                         if (opt.joliet) {
     699           0 :                                                 if (sec->escape[2] == 0x40)
     700             :                                                         joliet_level = 1;
     701           0 :                                                 else if (sec->escape[2] == 0x43)
     702             :                                                         joliet_level = 2;
     703           0 :                                                 else if (sec->escape[2] == 0x45)
     704           0 :                                                         joliet_level = 3;
     705             : 
     706           0 :                                                 printk(KERN_DEBUG "ISO 9660 Extensions: "
     707             :                                                         "Microsoft Joliet Level %d\n",
     708             :                                                         joliet_level);
     709             :                                         }
     710           0 :                                         goto root_found;
     711             :                                 } else {
     712             :                                 /* Unknown supplementary volume descriptor */
     713             :                                 sec = NULL;
     714             :                                 }
     715             :                         }
     716             : #endif
     717             :                 } else {
     718           0 :                         if (strncmp (hdp->id, HS_STANDARD_ID, sizeof hdp->id) == 0) {
     719           0 :                                 if (isonum_711(hdp->type) != ISO_VD_PRIMARY)
     720           0 :                                         goto out_freebh;
     721             : 
     722           0 :                                 sbi->s_high_sierra = 1;
     723           0 :                                 opt.rock = 0;
     724           0 :                                 h_pri = (struct hs_primary_descriptor *)vdp;
     725           0 :                                 goto root_found;
     726             :                         }
     727             :                 }
     728             : 
     729             :                 /* Just skip any volume descriptors we don't recognize */
     730             : 
     731           0 :                 brelse(bh);
     732           0 :                 bh = NULL;
     733             :         }
     734             :         /*
     735             :          * If we fall through, either no volume descriptor was found,
     736             :          * or else we passed a primary descriptor looking for others.
     737             :          */
     738           0 :         if (!pri)
     739           0 :                 goto out_unknown_format;
     740           0 :         brelse(bh);
     741             :         bh = pri_bh;
     742             :         pri_bh = NULL;
     743             : 
     744           0 : root_found:
     745             :         /* We don't support read-write mounts */
     746           0 :         if (!sb_rdonly(s)) {
     747           0 :                 error = -EACCES;
     748           0 :                 goto out_freebh;
     749             :         }
     750             : 
     751           0 :         if (joliet_level && (!pri || !opt.rock)) {
     752             :                 /* This is the case of Joliet with the norock mount flag.
     753             :                  * A disc with both Joliet and Rock Ridge is handled later
     754             :                  */
     755           0 :                 pri = (struct iso_primary_descriptor *) sec;
     756             :         }
     757             : 
     758           0 :         if(sbi->s_high_sierra){
     759           0 :                 rootp = (struct iso_directory_record *) h_pri->root_directory_record;
     760           0 :                 sbi->s_nzones = isonum_733(h_pri->volume_space_size);
     761           0 :                 sbi->s_log_zone_size = isonum_723(h_pri->logical_block_size);
     762           0 :                 sbi->s_max_size = isonum_733(h_pri->volume_space_size);
     763             :         } else {
     764           0 :                 if (!pri)
     765           0 :                         goto out_freebh;
     766           0 :                 rootp = (struct iso_directory_record *) pri->root_directory_record;
     767           0 :                 sbi->s_nzones = isonum_733(pri->volume_space_size);
     768           0 :                 sbi->s_log_zone_size = isonum_723(pri->logical_block_size);
     769           0 :                 sbi->s_max_size = isonum_733(pri->volume_space_size);
     770             :         }
     771             : 
     772           0 :         sbi->s_ninodes = 0; /* No way to figure this out easily */
     773             : 
     774           0 :         orig_zonesize = sbi->s_log_zone_size;
     775             :         /*
     776             :          * If the zone size is smaller than the hardware sector size,
     777             :          * this is a fatal error.  This would occur if the disc drive
     778             :          * had sectors that were 2048 bytes, but the filesystem had
     779             :          * blocks that were 512 bytes (which should only very rarely
     780             :          * happen.)
     781             :          */
     782           0 :         if (orig_zonesize < opt.blocksize)
     783           0 :                 goto out_bad_size;
     784             : 
     785             :         /* RDE: convert log zone size to bit shift */
     786           0 :         switch (sbi->s_log_zone_size) {
     787           0 :         case  512: sbi->s_log_zone_size =  9; break;
     788           0 :         case 1024: sbi->s_log_zone_size = 10; break;
     789           0 :         case 2048: sbi->s_log_zone_size = 11; break;
     790             : 
     791           0 :         default:
     792           0 :                 goto out_bad_zone_size;
     793             :         }
     794             : 
     795           0 :         s->s_magic = ISOFS_SUPER_MAGIC;
     796             : 
     797             :         /*
     798             :          * With multi-extent files, file size is only limited by the maximum
     799             :          * size of a file system, which is 8 TB.
     800             :          */
     801           0 :         s->s_maxbytes = 0x80000000000LL;
     802             : 
     803             :         /* ECMA-119 timestamp from 1900/1/1 with tz offset */
     804           0 :         s->s_time_min = mktime64(1900, 1, 1, 0, 0, 0) - MAX_TZ_OFFSET;
     805           0 :         s->s_time_max = mktime64(U8_MAX+1900, 12, 31, 23, 59, 59) + MAX_TZ_OFFSET;
     806             : 
     807             :         /* Set this for reference. Its not currently used except on write
     808             :            which we don't have .. */
     809             : 
     810           0 :         first_data_zone = isonum_733(rootp->extent) +
     811           0 :                           isonum_711(rootp->ext_attr_length);
     812           0 :         sbi->s_firstdatazone = first_data_zone;
     813             : #ifndef BEQUIET
     814             :         printk(KERN_DEBUG "ISOFS: Max size:%ld   Log zone size:%ld\n",
     815             :                 sbi->s_max_size, 1UL << sbi->s_log_zone_size);
     816             :         printk(KERN_DEBUG "ISOFS: First datazone:%ld\n", sbi->s_firstdatazone);
     817             :         if(sbi->s_high_sierra)
     818             :                 printk(KERN_DEBUG "ISOFS: Disc in High Sierra format.\n");
     819             : #endif
     820             : 
     821             :         /*
     822             :          * If the Joliet level is set, we _may_ decide to use the
     823             :          * secondary descriptor, but can't be sure until after we
     824             :          * read the root inode. But before reading the root inode
     825             :          * we may need to change the device blocksize, and would
     826             :          * rather release the old buffer first. So, we cache the
     827             :          * first_data_zone value from the secondary descriptor.
     828             :          */
     829           0 :         if (joliet_level) {
     830           0 :                 pri = (struct iso_primary_descriptor *) sec;
     831           0 :                 rootp = (struct iso_directory_record *)
     832             :                         pri->root_directory_record;
     833           0 :                 first_data_zone = isonum_733(rootp->extent) +
     834           0 :                                 isonum_711(rootp->ext_attr_length);
     835             :         }
     836             : 
     837             :         /*
     838             :          * We're all done using the volume descriptor, and may need
     839             :          * to change the device blocksize, so release the buffer now.
     840             :          */
     841           0 :         brelse(pri_bh);
     842           0 :         brelse(bh);
     843             : 
     844             :         /*
     845             :          * Force the blocksize to 512 for 512 byte sectors.  The file
     846             :          * read primitives really get it wrong in a bad way if we don't
     847             :          * do this.
     848             :          *
     849             :          * Note - we should never be setting the blocksize to something
     850             :          * less than the hardware sector size for the device.  If we
     851             :          * do, we would end up having to read larger buffers and split
     852             :          * out portions to satisfy requests.
     853             :          *
     854             :          * Note2- the idea here is that we want to deal with the optimal
     855             :          * zonesize in the filesystem.  If we have it set to something less,
     856             :          * then we have horrible problems with trying to piece together
     857             :          * bits of adjacent blocks in order to properly read directory
     858             :          * entries.  By forcing the blocksize in this way, we ensure
     859             :          * that we will never be required to do this.
     860             :          */
     861           0 :         sb_set_blocksize(s, orig_zonesize);
     862             : 
     863           0 :         sbi->s_nls_iocharset = NULL;
     864             : 
     865             : #ifdef CONFIG_JOLIET
     866           0 :         if (joliet_level && opt.utf8 == 0) {
     867           0 :                 char *p = opt.iocharset ? opt.iocharset : CONFIG_NLS_DEFAULT;
     868           0 :                 sbi->s_nls_iocharset = load_nls(p);
     869           0 :                 if (! sbi->s_nls_iocharset) {
     870             :                         /* Fail only if explicit charset specified */
     871           0 :                         if (opt.iocharset)
     872           0 :                                 goto out_freesbi;
     873           0 :                         sbi->s_nls_iocharset = load_nls_default();
     874             :                 }
     875             :         }
     876             : #endif
     877           0 :         s->s_op = &isofs_sops;
     878           0 :         s->s_export_op = &isofs_export_ops;
     879           0 :         sbi->s_mapping = opt.map;
     880           0 :         sbi->s_rock = (opt.rock ? 2 : 0);
     881           0 :         sbi->s_rock_offset = -1; /* initial offset, will guess until SP is found*/
     882           0 :         sbi->s_cruft = opt.cruft;
     883           0 :         sbi->s_hide = opt.hide;
     884           0 :         sbi->s_showassoc = opt.showassoc;
     885           0 :         sbi->s_uid = opt.uid;
     886           0 :         sbi->s_gid = opt.gid;
     887           0 :         sbi->s_uid_set = opt.uid_set;
     888           0 :         sbi->s_gid_set = opt.gid_set;
     889           0 :         sbi->s_utf8 = opt.utf8;
     890           0 :         sbi->s_nocompress = opt.nocompress;
     891           0 :         sbi->s_overriderockperm = opt.overriderockperm;
     892             :         /*
     893             :          * It would be incredibly stupid to allow people to mark every file
     894             :          * on the disk as suid, so we merely allow them to set the default
     895             :          * permissions.
     896             :          */
     897           0 :         if (opt.fmode != ISOFS_INVALID_MODE)
     898           0 :                 sbi->s_fmode = opt.fmode & 0777;
     899             :         else
     900           0 :                 sbi->s_fmode = ISOFS_INVALID_MODE;
     901           0 :         if (opt.dmode != ISOFS_INVALID_MODE)
     902           0 :                 sbi->s_dmode = opt.dmode & 0777;
     903             :         else
     904           0 :                 sbi->s_dmode = ISOFS_INVALID_MODE;
     905             : 
     906             :         /*
     907             :          * Read the root inode, which _may_ result in changing
     908             :          * the s_rock flag. Once we have the final s_rock value,
     909             :          * we then decide whether to use the Joliet descriptor.
     910             :          */
     911           0 :         inode = isofs_iget(s, sbi->s_firstdatazone, 0);
     912           0 :         if (IS_ERR(inode))
     913           0 :                 goto out_no_root;
     914             : 
     915             :         /*
     916             :          * Fix for broken CDs with Rock Ridge and empty ISO root directory but
     917             :          * correct Joliet root directory.
     918             :          */
     919           0 :         if (sbi->s_rock == 1 && joliet_level &&
     920           0 :                                 rootdir_empty(s, sbi->s_firstdatazone)) {
     921           0 :                 printk(KERN_NOTICE
     922             :                         "ISOFS: primary root directory is empty. "
     923             :                         "Disabling Rock Ridge and switching to Joliet.");
     924           0 :                 sbi->s_rock = 0;
     925             :         }
     926             : 
     927             :         /*
     928             :          * If this disk has both Rock Ridge and Joliet on it, then we
     929             :          * want to use Rock Ridge by default.  This can be overridden
     930             :          * by using the norock mount option.  There is still one other
     931             :          * possibility that is not taken into account: a Rock Ridge
     932             :          * CD with Unicode names.  Until someone sees such a beast, it
     933             :          * will not be supported.
     934             :          */
     935           0 :         if (sbi->s_rock == 1) {
     936             :                 joliet_level = 0;
     937           0 :         } else if (joliet_level) {
     938           0 :                 sbi->s_rock = 0;
     939           0 :                 if (sbi->s_firstdatazone != first_data_zone) {
     940           0 :                         sbi->s_firstdatazone = first_data_zone;
     941           0 :                         printk(KERN_DEBUG
     942             :                                 "ISOFS: changing to secondary root\n");
     943           0 :                         iput(inode);
     944           0 :                         inode = isofs_iget(s, sbi->s_firstdatazone, 0);
     945           0 :                         if (IS_ERR(inode))
     946           0 :                                 goto out_no_root;
     947             :                 }
     948             :         }
     949             : 
     950           0 :         if (opt.check == 'u') {
     951             :                 /* Only Joliet is case insensitive by default */
     952           0 :                 if (joliet_level)
     953           0 :                         opt.check = 'r';
     954             :                 else
     955           0 :                         opt.check = 's';
     956             :         }
     957           0 :         sbi->s_joliet_level = joliet_level;
     958             : 
     959             :         /* Make sure the root inode is a directory */
     960           0 :         if (!S_ISDIR(inode->i_mode)) {
     961           0 :                 printk(KERN_WARNING
     962             :                         "isofs_fill_super: root inode is not a directory. "
     963             :                         "Corrupted media?\n");
     964           0 :                 goto out_iput;
     965             :         }
     966             : 
     967           0 :         table = 0;
     968           0 :         if (joliet_level)
     969           0 :                 table += 2;
     970           0 :         if (opt.check == 'r')
     971           0 :                 table++;
     972           0 :         sbi->s_check = opt.check;
     973             : 
     974           0 :         if (table)
     975           0 :                 s->s_d_op = &isofs_dentry_ops[table - 1];
     976             : 
     977             :         /* get the root dentry */
     978           0 :         s->s_root = d_make_root(inode);
     979           0 :         if (!(s->s_root)) {
     980           0 :                 error = -ENOMEM;
     981           0 :                 goto out_no_inode;
     982             :         }
     983             : 
     984           0 :         kfree(opt.iocharset);
     985             : 
     986           0 :         return 0;
     987             : 
     988             :         /*
     989             :          * Display error messages and free resources.
     990             :          */
     991           0 : out_iput:
     992           0 :         iput(inode);
     993           0 :         goto out_no_inode;
     994           0 : out_no_root:
     995           0 :         error = PTR_ERR(inode);
     996           0 :         if (error != -ENOMEM)
     997           0 :                 printk(KERN_WARNING "%s: get root inode failed\n", __func__);
     998           0 : out_no_inode:
     999             : #ifdef CONFIG_JOLIET
    1000           0 :         unload_nls(sbi->s_nls_iocharset);
    1001             : #endif
    1002           0 :         goto out_freesbi;
    1003           0 : out_no_read:
    1004           0 :         printk(KERN_WARNING "%s: bread failed, dev=%s, iso_blknum=%d, block=%d\n",
    1005           0 :                 __func__, s->s_id, iso_blknum, block);
    1006           0 :         goto out_freebh;
    1007           0 : out_bad_zone_size:
    1008           0 :         printk(KERN_WARNING "ISOFS: Bad logical zone size %ld\n",
    1009             :                 sbi->s_log_zone_size);
    1010           0 :         goto out_freebh;
    1011           0 : out_bad_size:
    1012           0 :         printk(KERN_WARNING "ISOFS: Logical zone size(%d) < hardware blocksize(%u)\n",
    1013             :                 orig_zonesize, opt.blocksize);
    1014           0 :         goto out_freebh;
    1015           0 : out_unknown_format:
    1016           0 :         if (!silent)
    1017           0 :                 printk(KERN_WARNING "ISOFS: Unable to identify CD-ROM format.\n");
    1018             : 
    1019           0 : out_freebh:
    1020           0 :         brelse(bh);
    1021           0 :         brelse(pri_bh);
    1022           0 : out_freesbi:
    1023           0 :         kfree(opt.iocharset);
    1024           0 :         kfree(sbi);
    1025           0 :         s->s_fs_info = NULL;
    1026           0 :         return error;
    1027             : }
    1028             : 
    1029           0 : static int isofs_statfs (struct dentry *dentry, struct kstatfs *buf)
    1030             : {
    1031           0 :         struct super_block *sb = dentry->d_sb;
    1032           0 :         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
    1033             : 
    1034           0 :         buf->f_type = ISOFS_SUPER_MAGIC;
    1035           0 :         buf->f_bsize = sb->s_blocksize;
    1036           0 :         buf->f_blocks = (ISOFS_SB(sb)->s_nzones
    1037           0 :                 << (ISOFS_SB(sb)->s_log_zone_size - sb->s_blocksize_bits));
    1038           0 :         buf->f_bfree = 0;
    1039           0 :         buf->f_bavail = 0;
    1040           0 :         buf->f_files = ISOFS_SB(sb)->s_ninodes;
    1041           0 :         buf->f_ffree = 0;
    1042           0 :         buf->f_fsid = u64_to_fsid(id);
    1043           0 :         buf->f_namelen = NAME_MAX;
    1044           0 :         return 0;
    1045             : }
    1046             : 
    1047             : /*
    1048             :  * Get a set of blocks; filling in buffer_heads if already allocated
    1049             :  * or getblk() if they are not.  Returns the number of blocks inserted
    1050             :  * (-ve == error.)
    1051             :  */
    1052           0 : int isofs_get_blocks(struct inode *inode, sector_t iblock,
    1053             :                      struct buffer_head **bh, unsigned long nblocks)
    1054             : {
    1055           0 :         unsigned long b_off = iblock;
    1056           0 :         unsigned offset, sect_size;
    1057           0 :         unsigned int firstext;
    1058           0 :         unsigned long nextblk, nextoff;
    1059           0 :         int section, rv, error;
    1060           0 :         struct iso_inode_info *ei = ISOFS_I(inode);
    1061             : 
    1062           0 :         error = -EIO;
    1063           0 :         rv = 0;
    1064           0 :         if (iblock != b_off) {
    1065             :                 printk(KERN_DEBUG "%s: block number too large\n", __func__);
    1066             :                 goto abort;
    1067             :         }
    1068             : 
    1069             : 
    1070           0 :         offset = 0;
    1071           0 :         firstext = ei->i_first_extent;
    1072           0 :         sect_size = ei->i_section_size >> ISOFS_BUFFER_BITS(inode);
    1073           0 :         nextblk = ei->i_next_section_block;
    1074           0 :         nextoff = ei->i_next_section_offset;
    1075           0 :         section = 0;
    1076             : 
    1077           0 :         while (nblocks) {
    1078             :                 /* If we are *way* beyond the end of the file, print a message.
    1079             :                  * Access beyond the end of the file up to the next page boundary
    1080             :                  * is normal, however because of the way the page cache works.
    1081             :                  * In this case, we just return 0 so that we can properly fill
    1082             :                  * the page with useless information without generating any
    1083             :                  * I/O errors.
    1084             :                  */
    1085           0 :                 if (b_off > ((inode->i_size + PAGE_SIZE - 1) >> ISOFS_BUFFER_BITS(inode))) {
    1086           0 :                         printk(KERN_DEBUG "%s: block >= EOF (%lu, %llu)\n",
    1087             :                                 __func__, b_off,
    1088             :                                 (unsigned long long)inode->i_size);
    1089           0 :                         goto abort;
    1090             :                 }
    1091             : 
    1092             :                 /* On the last section, nextblk == 0, section size is likely to
    1093             :                  * exceed sect_size by a partial block, and access beyond the
    1094             :                  * end of the file will reach beyond the section size, too.
    1095             :                  */
    1096           0 :                 while (nextblk && (b_off >= (offset + sect_size))) {
    1097           0 :                         struct inode *ninode;
    1098             : 
    1099           0 :                         offset += sect_size;
    1100           0 :                         ninode = isofs_iget(inode->i_sb, nextblk, nextoff);
    1101           0 :                         if (IS_ERR(ninode)) {
    1102           0 :                                 error = PTR_ERR(ninode);
    1103           0 :                                 goto abort;
    1104             :                         }
    1105           0 :                         firstext  = ISOFS_I(ninode)->i_first_extent;
    1106           0 :                         sect_size = ISOFS_I(ninode)->i_section_size >> ISOFS_BUFFER_BITS(ninode);
    1107           0 :                         nextblk   = ISOFS_I(ninode)->i_next_section_block;
    1108           0 :                         nextoff   = ISOFS_I(ninode)->i_next_section_offset;
    1109           0 :                         iput(ninode);
    1110             : 
    1111           0 :                         if (++section > 100) {
    1112           0 :                                 printk(KERN_DEBUG "%s: More than 100 file sections ?!?"
    1113             :                                         " aborting...\n", __func__);
    1114           0 :                                 printk(KERN_DEBUG "%s: block=%lu firstext=%u sect_size=%u "
    1115             :                                         "nextblk=%lu nextoff=%lu\n", __func__,
    1116             :                                         b_off, firstext, (unsigned) sect_size,
    1117             :                                         nextblk, nextoff);
    1118           0 :                                 goto abort;
    1119             :                         }
    1120             :                 }
    1121             : 
    1122           0 :                 if (*bh) {
    1123           0 :                         map_bh(*bh, inode->i_sb, firstext + b_off - offset);
    1124             :                 } else {
    1125           0 :                         *bh = sb_getblk(inode->i_sb, firstext+b_off-offset);
    1126           0 :                         if (!*bh)
    1127           0 :                                 goto abort;
    1128             :                 }
    1129           0 :                 bh++;   /* Next buffer head */
    1130           0 :                 b_off++;        /* Next buffer offset */
    1131           0 :                 nblocks--;
    1132           0 :                 rv++;
    1133             :         }
    1134             : 
    1135             :         error = 0;
    1136           0 : abort:
    1137           0 :         return rv != 0 ? rv : error;
    1138             : }
    1139             : 
    1140             : /*
    1141             :  * Used by the standard interfaces.
    1142             :  */
    1143           0 : static int isofs_get_block(struct inode *inode, sector_t iblock,
    1144             :                     struct buffer_head *bh_result, int create)
    1145             : {
    1146           0 :         int ret;
    1147             : 
    1148           0 :         if (create) {
    1149           0 :                 printk(KERN_DEBUG "%s: Kernel tries to allocate a block\n", __func__);
    1150           0 :                 return -EROFS;
    1151             :         }
    1152             : 
    1153           0 :         ret = isofs_get_blocks(inode, iblock, &bh_result, 1);
    1154           0 :         return ret < 0 ? ret : 0;
    1155             : }
    1156             : 
    1157           0 : static int isofs_bmap(struct inode *inode, sector_t block)
    1158             : {
    1159           0 :         struct buffer_head dummy;
    1160           0 :         int error;
    1161             : 
    1162           0 :         dummy.b_state = 0;
    1163           0 :         dummy.b_blocknr = -1000;
    1164           0 :         error = isofs_get_block(inode, block, &dummy, 0);
    1165           0 :         if (!error)
    1166           0 :                 return dummy.b_blocknr;
    1167             :         return 0;
    1168             : }
    1169             : 
    1170           0 : struct buffer_head *isofs_bread(struct inode *inode, sector_t block)
    1171             : {
    1172           0 :         sector_t blknr = isofs_bmap(inode, block);
    1173           0 :         if (!blknr)
    1174             :                 return NULL;
    1175           0 :         return sb_bread(inode->i_sb, blknr);
    1176             : }
    1177             : 
    1178           0 : static int isofs_readpage(struct file *file, struct page *page)
    1179             : {
    1180           0 :         return mpage_readpage(page, isofs_get_block);
    1181             : }
    1182             : 
    1183           0 : static void isofs_readahead(struct readahead_control *rac)
    1184             : {
    1185           0 :         mpage_readahead(rac, isofs_get_block);
    1186           0 : }
    1187             : 
    1188           0 : static sector_t _isofs_bmap(struct address_space *mapping, sector_t block)
    1189             : {
    1190           0 :         return generic_block_bmap(mapping,block,isofs_get_block);
    1191             : }
    1192             : 
    1193             : static const struct address_space_operations isofs_aops = {
    1194             :         .readpage = isofs_readpage,
    1195             :         .readahead = isofs_readahead,
    1196             :         .bmap = _isofs_bmap
    1197             : };
    1198             : 
    1199           0 : static int isofs_read_level3_size(struct inode *inode)
    1200             : {
    1201           0 :         unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
    1202           0 :         int high_sierra = ISOFS_SB(inode->i_sb)->s_high_sierra;
    1203           0 :         struct buffer_head *bh = NULL;
    1204           0 :         unsigned long block, offset, block_saved, offset_saved;
    1205           0 :         int i = 0;
    1206           0 :         int more_entries = 0;
    1207           0 :         struct iso_directory_record *tmpde = NULL;
    1208           0 :         struct iso_inode_info *ei = ISOFS_I(inode);
    1209             : 
    1210           0 :         inode->i_size = 0;
    1211             : 
    1212             :         /* The first 16 blocks are reserved as the System Area.  Thus,
    1213             :          * no inodes can appear in block 0.  We use this to flag that
    1214             :          * this is the last section. */
    1215           0 :         ei->i_next_section_block = 0;
    1216           0 :         ei->i_next_section_offset = 0;
    1217             : 
    1218           0 :         block = ei->i_iget5_block;
    1219           0 :         offset = ei->i_iget5_offset;
    1220             : 
    1221           0 :         do {
    1222           0 :                 struct iso_directory_record *de;
    1223           0 :                 unsigned int de_len;
    1224             : 
    1225           0 :                 if (!bh) {
    1226           0 :                         bh = sb_bread(inode->i_sb, block);
    1227           0 :                         if (!bh)
    1228           0 :                                 goto out_noread;
    1229             :                 }
    1230           0 :                 de = (struct iso_directory_record *) (bh->b_data + offset);
    1231           0 :                 de_len = *(unsigned char *) de;
    1232             : 
    1233           0 :                 if (de_len == 0) {
    1234           0 :                         brelse(bh);
    1235           0 :                         bh = NULL;
    1236           0 :                         ++block;
    1237           0 :                         offset = 0;
    1238           0 :                         continue;
    1239             :                 }
    1240             : 
    1241           0 :                 block_saved = block;
    1242           0 :                 offset_saved = offset;
    1243           0 :                 offset += de_len;
    1244             : 
    1245             :                 /* Make sure we have a full directory entry */
    1246           0 :                 if (offset >= bufsize) {
    1247           0 :                         int slop = bufsize - offset + de_len;
    1248           0 :                         if (!tmpde) {
    1249           0 :                                 tmpde = kmalloc(256, GFP_KERNEL);
    1250           0 :                                 if (!tmpde)
    1251           0 :                                         goto out_nomem;
    1252             :                         }
    1253           0 :                         memcpy(tmpde, de, slop);
    1254           0 :                         offset &= bufsize - 1;
    1255           0 :                         block++;
    1256           0 :                         brelse(bh);
    1257           0 :                         bh = NULL;
    1258           0 :                         if (offset) {
    1259           0 :                                 bh = sb_bread(inode->i_sb, block);
    1260           0 :                                 if (!bh)
    1261           0 :                                         goto out_noread;
    1262           0 :                                 memcpy((void *)tmpde+slop, bh->b_data, offset);
    1263             :                         }
    1264             :                         de = tmpde;
    1265             :                 }
    1266             : 
    1267           0 :                 inode->i_size += isonum_733(de->size);
    1268           0 :                 if (i == 1) {
    1269           0 :                         ei->i_next_section_block = block_saved;
    1270           0 :                         ei->i_next_section_offset = offset_saved;
    1271             :                 }
    1272             : 
    1273           0 :                 more_entries = de->flags[-high_sierra] & 0x80;
    1274             : 
    1275           0 :                 i++;
    1276           0 :                 if (i > 100)
    1277           0 :                         goto out_toomany;
    1278           0 :         } while (more_entries);
    1279           0 : out:
    1280           0 :         kfree(tmpde);
    1281           0 :         if (bh)
    1282           0 :                 brelse(bh);
    1283             :         return 0;
    1284             : 
    1285           0 : out_nomem:
    1286           0 :         if (bh)
    1287           0 :                 brelse(bh);
    1288             :         return -ENOMEM;
    1289             : 
    1290           0 : out_noread:
    1291           0 :         printk(KERN_INFO "ISOFS: unable to read i-node block %lu\n", block);
    1292           0 :         kfree(tmpde);
    1293           0 :         return -EIO;
    1294             : 
    1295           0 : out_toomany:
    1296           0 :         printk(KERN_INFO "%s: More than 100 file sections ?!?, aborting...\n"
    1297             :                 "isofs_read_level3_size: inode=%lu\n",
    1298             :                 __func__, inode->i_ino);
    1299           0 :         goto out;
    1300             : }
    1301             : 
    1302           0 : static int isofs_read_inode(struct inode *inode, int relocated)
    1303             : {
    1304           0 :         struct super_block *sb = inode->i_sb;
    1305           0 :         struct isofs_sb_info *sbi = ISOFS_SB(sb);
    1306           0 :         unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
    1307           0 :         unsigned long block;
    1308           0 :         int high_sierra = sbi->s_high_sierra;
    1309           0 :         struct buffer_head *bh;
    1310           0 :         struct iso_directory_record *de;
    1311           0 :         struct iso_directory_record *tmpde = NULL;
    1312           0 :         unsigned int de_len;
    1313           0 :         unsigned long offset;
    1314           0 :         struct iso_inode_info *ei = ISOFS_I(inode);
    1315           0 :         int ret = -EIO;
    1316             : 
    1317           0 :         block = ei->i_iget5_block;
    1318           0 :         bh = sb_bread(inode->i_sb, block);
    1319           0 :         if (!bh)
    1320           0 :                 goto out_badread;
    1321             : 
    1322           0 :         offset = ei->i_iget5_offset;
    1323             : 
    1324           0 :         de = (struct iso_directory_record *) (bh->b_data + offset);
    1325           0 :         de_len = *(unsigned char *) de;
    1326             : 
    1327           0 :         if (offset + de_len > bufsize) {
    1328           0 :                 int frag1 = bufsize - offset;
    1329             : 
    1330           0 :                 tmpde = kmalloc(de_len, GFP_KERNEL);
    1331           0 :                 if (!tmpde) {
    1332           0 :                         ret = -ENOMEM;
    1333           0 :                         goto fail;
    1334             :                 }
    1335           0 :                 memcpy(tmpde, bh->b_data + offset, frag1);
    1336           0 :                 brelse(bh);
    1337           0 :                 bh = sb_bread(inode->i_sb, ++block);
    1338           0 :                 if (!bh)
    1339           0 :                         goto out_badread;
    1340           0 :                 memcpy((char *)tmpde+frag1, bh->b_data, de_len - frag1);
    1341           0 :                 de = tmpde;
    1342             :         }
    1343             : 
    1344           0 :         inode->i_ino = isofs_get_ino(ei->i_iget5_block,
    1345             :                                         ei->i_iget5_offset,
    1346           0 :                                         ISOFS_BUFFER_BITS(inode));
    1347             : 
    1348             :         /* Assume it is a normal-format file unless told otherwise */
    1349           0 :         ei->i_file_format = isofs_file_normal;
    1350             : 
    1351           0 :         if (de->flags[-high_sierra] & 2) {
    1352           0 :                 if (sbi->s_dmode != ISOFS_INVALID_MODE)
    1353           0 :                         inode->i_mode = S_IFDIR | sbi->s_dmode;
    1354             :                 else
    1355           0 :                         inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO;
    1356           0 :                 set_nlink(inode, 1);    /*
    1357             :                                          * Set to 1.  We know there are 2, but
    1358             :                                          * the find utility tries to optimize
    1359             :                                          * if it is 2, and it screws up.  It is
    1360             :                                          * easier to give 1 which tells find to
    1361             :                                          * do it the hard way.
    1362             :                                          */
    1363             :         } else {
    1364           0 :                 if (sbi->s_fmode != ISOFS_INVALID_MODE) {
    1365           0 :                         inode->i_mode = S_IFREG | sbi->s_fmode;
    1366             :                 } else {
    1367             :                         /*
    1368             :                          * Set default permissions: r-x for all.  The disc
    1369             :                          * could be shared with DOS machines so virtually
    1370             :                          * anything could be a valid executable.
    1371             :                          */
    1372           0 :                         inode->i_mode = S_IFREG | S_IRUGO | S_IXUGO;
    1373             :                 }
    1374           0 :                 set_nlink(inode, 1);
    1375             :         }
    1376           0 :         inode->i_uid = sbi->s_uid;
    1377           0 :         inode->i_gid = sbi->s_gid;
    1378           0 :         inode->i_blocks = 0;
    1379             : 
    1380           0 :         ei->i_format_parm[0] = 0;
    1381           0 :         ei->i_format_parm[1] = 0;
    1382           0 :         ei->i_format_parm[2] = 0;
    1383             : 
    1384           0 :         ei->i_section_size = isonum_733(de->size);
    1385           0 :         if (de->flags[-high_sierra] & 0x80) {
    1386           0 :                 ret = isofs_read_level3_size(inode);
    1387           0 :                 if (ret < 0)
    1388           0 :                         goto fail;
    1389           0 :                 ret = -EIO;
    1390             :         } else {
    1391           0 :                 ei->i_next_section_block = 0;
    1392           0 :                 ei->i_next_section_offset = 0;
    1393           0 :                 inode->i_size = isonum_733(de->size);
    1394             :         }
    1395             : 
    1396             :         /*
    1397             :          * Some dipshit decided to store some other bit of information
    1398             :          * in the high byte of the file length.  Truncate size in case
    1399             :          * this CDROM was mounted with the cruft option.
    1400             :          */
    1401             : 
    1402           0 :         if (sbi->s_cruft)
    1403           0 :                 inode->i_size &= 0x00ffffff;
    1404             : 
    1405           0 :         if (de->interleave[0]) {
    1406           0 :                 printk(KERN_DEBUG "ISOFS: Interleaved files not (yet) supported.\n");
    1407           0 :                 inode->i_size = 0;
    1408             :         }
    1409             : 
    1410             :         /* I have no idea what file_unit_size is used for, so
    1411             :            we will flag it for now */
    1412           0 :         if (de->file_unit_size[0] != 0) {
    1413           0 :                 printk(KERN_DEBUG "ISOFS: File unit size != 0 for ISO file (%ld).\n",
    1414             :                         inode->i_ino);
    1415             :         }
    1416             : 
    1417             :         /* I have no idea what other flag bits are used for, so
    1418             :            we will flag it for now */
    1419             : #ifdef DEBUG
    1420             :         if((de->flags[-high_sierra] & ~2)!= 0){
    1421             :                 printk(KERN_DEBUG "ISOFS: Unusual flag settings for ISO file "
    1422             :                                 "(%ld %x).\n",
    1423             :                         inode->i_ino, de->flags[-high_sierra]);
    1424             :         }
    1425             : #endif
    1426             : 
    1427           0 :         inode->i_mtime.tv_sec =
    1428           0 :         inode->i_atime.tv_sec =
    1429           0 :         inode->i_ctime.tv_sec = iso_date(de->date, high_sierra);
    1430           0 :         inode->i_mtime.tv_nsec =
    1431           0 :         inode->i_atime.tv_nsec =
    1432           0 :         inode->i_ctime.tv_nsec = 0;
    1433             : 
    1434           0 :         ei->i_first_extent = (isonum_733(de->extent) +
    1435           0 :                         isonum_711(de->ext_attr_length));
    1436             : 
    1437             :         /* Set the number of blocks for stat() - should be done before RR */
    1438           0 :         inode->i_blocks = (inode->i_size + 511) >> 9;
    1439             : 
    1440             :         /*
    1441             :          * Now test for possible Rock Ridge extensions which will override
    1442             :          * some of these numbers in the inode structure.
    1443             :          */
    1444             : 
    1445           0 :         if (!high_sierra) {
    1446           0 :                 parse_rock_ridge_inode(de, inode, relocated);
    1447             :                 /* if we want uid/gid set, override the rock ridge setting */
    1448           0 :                 if (sbi->s_uid_set)
    1449           0 :                         inode->i_uid = sbi->s_uid;
    1450           0 :                 if (sbi->s_gid_set)
    1451           0 :                         inode->i_gid = sbi->s_gid;
    1452             :         }
    1453             :         /* Now set final access rights if overriding rock ridge setting */
    1454           0 :         if (S_ISDIR(inode->i_mode) && sbi->s_overriderockperm &&
    1455           0 :             sbi->s_dmode != ISOFS_INVALID_MODE)
    1456           0 :                 inode->i_mode = S_IFDIR | sbi->s_dmode;
    1457           0 :         if (S_ISREG(inode->i_mode) && sbi->s_overriderockperm &&
    1458           0 :             sbi->s_fmode != ISOFS_INVALID_MODE)
    1459           0 :                 inode->i_mode = S_IFREG | sbi->s_fmode;
    1460             : 
    1461             :         /* Install the inode operations vector */
    1462           0 :         if (S_ISREG(inode->i_mode)) {
    1463           0 :                 inode->i_fop = &generic_ro_fops;
    1464           0 :                 switch (ei->i_file_format) {
    1465             : #ifdef CONFIG_ZISOFS
    1466             :                 case isofs_file_compressed:
    1467             :                         inode->i_data.a_ops = &zisofs_aops;
    1468             :                         break;
    1469             : #endif
    1470             :                 default:
    1471           0 :                         inode->i_data.a_ops = &isofs_aops;
    1472           0 :                         break;
    1473             :                 }
    1474           0 :         } else if (S_ISDIR(inode->i_mode)) {
    1475           0 :                 inode->i_op = &isofs_dir_inode_operations;
    1476           0 :                 inode->i_fop = &isofs_dir_operations;
    1477           0 :         } else if (S_ISLNK(inode->i_mode)) {
    1478           0 :                 inode->i_op = &page_symlink_inode_operations;
    1479           0 :                 inode_nohighmem(inode);
    1480           0 :                 inode->i_data.a_ops = &isofs_symlink_aops;
    1481             :         } else
    1482             :                 /* XXX - parse_rock_ridge_inode() had already set i_rdev. */
    1483           0 :                 init_special_inode(inode, inode->i_mode, inode->i_rdev);
    1484             : 
    1485             :         ret = 0;
    1486           0 : out:
    1487           0 :         kfree(tmpde);
    1488           0 :         if (bh)
    1489           0 :                 brelse(bh);
    1490           0 :         return ret;
    1491             : 
    1492           0 : out_badread:
    1493           0 :         printk(KERN_WARNING "ISOFS: unable to read i-node block\n");
    1494           0 : fail:
    1495           0 :         goto out;
    1496             : }
    1497             : 
    1498             : struct isofs_iget5_callback_data {
    1499             :         unsigned long block;
    1500             :         unsigned long offset;
    1501             : };
    1502             : 
    1503           0 : static int isofs_iget5_test(struct inode *ino, void *data)
    1504             : {
    1505           0 :         struct iso_inode_info *i = ISOFS_I(ino);
    1506           0 :         struct isofs_iget5_callback_data *d =
    1507             :                 (struct isofs_iget5_callback_data*)data;
    1508           0 :         return (i->i_iget5_block == d->block)
    1509           0 :                 && (i->i_iget5_offset == d->offset);
    1510             : }
    1511             : 
    1512           0 : static int isofs_iget5_set(struct inode *ino, void *data)
    1513             : {
    1514           0 :         struct iso_inode_info *i = ISOFS_I(ino);
    1515           0 :         struct isofs_iget5_callback_data *d =
    1516             :                 (struct isofs_iget5_callback_data*)data;
    1517           0 :         i->i_iget5_block = d->block;
    1518           0 :         i->i_iget5_offset = d->offset;
    1519           0 :         return 0;
    1520             : }
    1521             : 
    1522             : /* Store, in the inode's containing structure, the block and block
    1523             :  * offset that point to the underlying meta-data for the inode.  The
    1524             :  * code below is otherwise similar to the iget() code in
    1525             :  * include/linux/fs.h */
    1526           0 : struct inode *__isofs_iget(struct super_block *sb,
    1527             :                            unsigned long block,
    1528             :                            unsigned long offset,
    1529             :                            int relocated)
    1530             : {
    1531           0 :         unsigned long hashval;
    1532           0 :         struct inode *inode;
    1533           0 :         struct isofs_iget5_callback_data data;
    1534           0 :         long ret;
    1535             : 
    1536           0 :         if (offset >= 1ul << sb->s_blocksize_bits)
    1537           0 :                 return ERR_PTR(-EINVAL);
    1538             : 
    1539           0 :         data.block = block;
    1540           0 :         data.offset = offset;
    1541             : 
    1542           0 :         hashval = (block << sb->s_blocksize_bits) | offset;
    1543             : 
    1544           0 :         inode = iget5_locked(sb, hashval, &isofs_iget5_test,
    1545             :                                 &isofs_iget5_set, &data);
    1546             : 
    1547           0 :         if (!inode)
    1548           0 :                 return ERR_PTR(-ENOMEM);
    1549             : 
    1550           0 :         if (inode->i_state & I_NEW) {
    1551           0 :                 ret = isofs_read_inode(inode, relocated);
    1552           0 :                 if (ret < 0) {
    1553           0 :                         iget_failed(inode);
    1554           0 :                         inode = ERR_PTR(ret);
    1555             :                 } else {
    1556           0 :                         unlock_new_inode(inode);
    1557             :                 }
    1558             :         }
    1559             : 
    1560             :         return inode;
    1561             : }
    1562             : 
    1563           0 : static struct dentry *isofs_mount(struct file_system_type *fs_type,
    1564             :         int flags, const char *dev_name, void *data)
    1565             : {
    1566           0 :         return mount_bdev(fs_type, flags, dev_name, data, isofs_fill_super);
    1567             : }
    1568             : 
    1569             : static struct file_system_type iso9660_fs_type = {
    1570             :         .owner          = THIS_MODULE,
    1571             :         .name           = "iso9660",
    1572             :         .mount          = isofs_mount,
    1573             :         .kill_sb        = kill_block_super,
    1574             :         .fs_flags       = FS_REQUIRES_DEV,
    1575             : };
    1576             : MODULE_ALIAS_FS("iso9660");
    1577             : MODULE_ALIAS("iso9660");
    1578             : 
    1579           1 : static int __init init_iso9660_fs(void)
    1580             : {
    1581           1 :         int err = init_inodecache();
    1582           1 :         if (err)
    1583           0 :                 goto out;
    1584             : #ifdef CONFIG_ZISOFS
    1585             :         err = zisofs_init();
    1586             :         if (err)
    1587             :                 goto out1;
    1588             : #endif
    1589           1 :         err = register_filesystem(&iso9660_fs_type);
    1590           1 :         if (err)
    1591           0 :                 goto out2;
    1592             :         return 0;
    1593           0 : out2:
    1594             : #ifdef CONFIG_ZISOFS
    1595             :         zisofs_cleanup();
    1596             : out1:
    1597             : #endif
    1598           0 :         destroy_inodecache();
    1599             : out:
    1600             :         return err;
    1601             : }
    1602             : 
    1603           0 : static void __exit exit_iso9660_fs(void)
    1604             : {
    1605           0 :         unregister_filesystem(&iso9660_fs_type);
    1606             : #ifdef CONFIG_ZISOFS
    1607             :         zisofs_cleanup();
    1608             : #endif
    1609           0 :         destroy_inodecache();
    1610           0 : }
    1611             : 
    1612             : module_init(init_iso9660_fs)
    1613             : module_exit(exit_iso9660_fs)
    1614             : MODULE_LICENSE("GPL");

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