| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Linus Torvalds (pre-git) | 3437 | 48.61% | 104 | 44.83% |
| Eric Sandeen | 567 | 8.02% | 3 | 1.29% |
| Linus Torvalds | 560 | 7.92% | 22 | 9.48% |
| David Howells | 524 | 7.41% | 5 | 2.16% |
| Jan Kara | 354 | 5.01% | 10 | 4.31% |
| Paul Serice | 318 | 4.50% | 2 | 0.86% |
| Andrew Morton | 222 | 3.14% | 8 | 3.45% |
| Ondrej Zary | 137 | 1.94% | 1 | 0.43% |
| Brian Gerst | 134 | 1.90% | 2 | 0.86% |
| Nicholas Piggin | 130 | 1.84% | 4 | 1.72% |
| Al Viro | 107 | 1.51% | 14 | 6.03% |
| Arnd Bergmann | 64 | 0.91% | 2 | 0.86% |
| Dave Jones | 60 | 0.85% | 2 | 0.86% |
| Deepa Dinamani | 50 | 0.71% | 1 | 0.43% |
| Christoph Hellwig | 48 | 0.68% | 4 | 1.72% |
| Pali Rohár | 46 | 0.65% | 1 | 0.43% |
| Jeremy White | 37 | 0.52% | 1 | 0.43% |
| Alex Henrie | 35 | 0.49% | 1 | 0.43% |
| Art Haas | 32 | 0.45% | 1 | 0.43% |
| Chengguang Xu | 24 | 0.34% | 1 | 0.43% |
| Coly Li | 18 | 0.25% | 1 | 0.43% |
| Matthew Wilcox | 16 | 0.23% | 2 | 0.86% |
| Namjae Jeon | 16 | 0.23% | 1 | 0.43% |
| Kirill Kuvaldin | 15 | 0.21% | 1 | 0.43% |
| Jeff Layton | 13 | 0.18% | 2 | 0.86% |
| Ram Pai | 10 | 0.14% | 1 | 0.43% |
| Miklos Szeredi | 10 | 0.14% | 2 | 0.86% |
| Alan Cox | 9 | 0.13% | 1 | 0.43% |
| Neil Brown | 7 | 0.10% | 1 | 0.43% |
| Eric W. Biedermann | 6 | 0.08% | 3 | 1.29% |
| Christoph Lameter | 6 | 0.08% | 3 | 1.29% |
| Bartlomiej Zolnierkiewicz | 6 | 0.08% | 1 | 0.43% |
| Jeff Mahoney | 5 | 0.07% | 1 | 0.43% |
| Joel & Rebecca VanderZee | 5 | 0.07% | 1 | 0.43% |
| Jeff Johnson | 5 | 0.07% | 1 | 0.43% |
| Kirill A. Shutemov | 5 | 0.07% | 2 | 0.86% |
| SF Markus Elfring | 4 | 0.06% | 1 | 0.43% |
| Theodore Y. Ts'o | 4 | 0.06% | 1 | 0.43% |
| Paul Jackson | 3 | 0.04% | 2 | 0.86% |
| Song Muchun | 3 | 0.04% | 1 | 0.43% |
| Ingo Molnar | 3 | 0.04% | 1 | 0.43% |
| Andi Kleen | 2 | 0.03% | 1 | 0.43% |
| Bingjing Chang | 2 | 0.03% | 1 | 0.43% |
| Andries E. Brouwer | 2 | 0.03% | 2 | 0.86% |
| Jan Andres | 2 | 0.03% | 1 | 0.43% |
| Panagiotis Issaris | 1 | 0.01% | 1 | 0.43% |
| Thomas Gleixner | 1 | 0.01% | 1 | 0.43% |
| Vladimir Davydov | 1 | 0.01% | 1 | 0.43% |
| Rasmus Villemoes | 1 | 0.01% | 1 | 0.43% |
| Jan Engelhardt | 1 | 0.01% | 1 | 0.43% |
| Fabian Frederick | 1 | 0.01% | 1 | 0.43% |
| Josef 'Jeff' Sipek | 1 | 0.01% | 1 | 0.43% |
| Steven Whitehouse | 1 | 0.01% | 1 | 0.43% |
| Total | 7071 | 232 |
// SPDX-License-Identifier: GPL-2.0-only /* * linux/fs/isofs/inode.c * * (C) 1991 Linus Torvalds - minix filesystem * 1992, 1993, 1994 Eric Youngdale Modified for ISO 9660 filesystem. * 1994 Eberhard Mönkeberg - multi session handling. * 1995 Mark Dobie - allow mounting of some weird VideoCDs and PhotoCDs. * 1997 Gordon Chaffee - Joliet CDs * 1998 Eric Lammerts - ISO 9660 Level 3 * 2004 Paul Serice - Inode Support pushed out from 4GB to 128GB * 2004 Paul Serice - NFS Export Operations */ #include <linux/init.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/cred.h> #include <linux/nls.h> #include <linux/ctype.h> #include <linux/statfs.h> #include <linux/cdrom.h> #include <linux/mpage.h> #include <linux/user_namespace.h> #include <linux/seq_file.h> #include <linux/blkdev.h> #include <linux/fs_context.h> #include <linux/fs_parser.h> #include "isofs.h" #include "zisofs.h" /* max tz offset is 13 hours */ #define MAX_TZ_OFFSET (52*15*60) #define BEQUIET static int isofs_hashi(const struct dentry *parent, struct qstr *qstr); static int isofs_dentry_cmpi(const struct dentry *dentry, unsigned int len, const char *str, const struct qstr *name); #ifdef CONFIG_JOLIET static int isofs_hashi_ms(const struct dentry *parent, struct qstr *qstr); static int isofs_hash_ms(const struct dentry *parent, struct qstr *qstr); static int isofs_dentry_cmpi_ms(const struct dentry *dentry, unsigned int len, const char *str, const struct qstr *name); static int isofs_dentry_cmp_ms(const struct dentry *dentry, unsigned int len, const char *str, const struct qstr *name); #endif static void isofs_put_super(struct super_block *sb) { struct isofs_sb_info *sbi = ISOFS_SB(sb); #ifdef CONFIG_JOLIET unload_nls(sbi->s_nls_iocharset); #endif kfree(sbi); sb->s_fs_info = NULL; return; } static int isofs_read_inode(struct inode *, int relocated); static int isofs_statfs (struct dentry *, struct kstatfs *); static int isofs_show_options(struct seq_file *, struct dentry *); static struct kmem_cache *isofs_inode_cachep; static struct inode *isofs_alloc_inode(struct super_block *sb) { struct iso_inode_info *ei; ei = alloc_inode_sb(sb, isofs_inode_cachep, GFP_KERNEL); if (!ei) return NULL; return &ei->vfs_inode; } static void isofs_free_inode(struct inode *inode) { kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode)); } static void init_once(void *foo) { struct iso_inode_info *ei = foo; inode_init_once(&ei->vfs_inode); } static int __init init_inodecache(void) { isofs_inode_cachep = kmem_cache_create("isofs_inode_cache", sizeof(struct iso_inode_info), 0, (SLAB_RECLAIM_ACCOUNT| SLAB_ACCOUNT), init_once); if (!isofs_inode_cachep) return -ENOMEM; return 0; } static void destroy_inodecache(void) { /* * Make sure all delayed rcu free inodes are flushed before we * destroy cache. */ rcu_barrier(); kmem_cache_destroy(isofs_inode_cachep); } static int isofs_reconfigure(struct fs_context *fc) { sync_filesystem(fc->root->d_sb); if (!(fc->sb_flags & SB_RDONLY)) return -EROFS; return 0; } static const struct super_operations isofs_sops = { .alloc_inode = isofs_alloc_inode, .free_inode = isofs_free_inode, .put_super = isofs_put_super, .statfs = isofs_statfs, .show_options = isofs_show_options, }; static const struct dentry_operations isofs_dentry_ops[] = { { .d_hash = isofs_hashi, .d_compare = isofs_dentry_cmpi, }, #ifdef CONFIG_JOLIET { .d_hash = isofs_hash_ms, .d_compare = isofs_dentry_cmp_ms, }, { .d_hash = isofs_hashi_ms, .d_compare = isofs_dentry_cmpi_ms, }, #endif }; struct isofs_options{ unsigned int rock:1; unsigned int joliet:1; unsigned int cruft:1; unsigned int hide:1; unsigned int showassoc:1; unsigned int nocompress:1; unsigned int overriderockperm:1; unsigned int uid_set:1; unsigned int gid_set:1; unsigned char map; unsigned char check; unsigned int blocksize; umode_t fmode; umode_t dmode; kgid_t gid; kuid_t uid; char *iocharset; /* LVE */ s32 session; s32 sbsector; }; /* * Compute the hash for the isofs name corresponding to the dentry. */ static int isofs_hashi_common(const struct dentry *dentry, struct qstr *qstr, int ms) { const char *name; int len; char c; unsigned long hash; len = qstr->len; name = qstr->name; if (ms) { while (len && name[len-1] == '.') len--; } hash = init_name_hash(dentry); while (len--) { c = tolower(*name++); hash = partial_name_hash(c, hash); } qstr->hash = end_name_hash(hash); return 0; } /* * Compare of two isofs names. */ static int isofs_dentry_cmp_common( unsigned int len, const char *str, const struct qstr *name, int ms, int ci) { int alen, blen; /* A filename cannot end in '.' or we treat it like it has none */ alen = name->len; blen = len; if (ms) { while (alen && name->name[alen-1] == '.') alen--; while (blen && str[blen-1] == '.') blen--; } if (alen == blen) { if (ci) { if (strncasecmp(name->name, str, alen) == 0) return 0; } else { if (strncmp(name->name, str, alen) == 0) return 0; } } return 1; } static int isofs_hashi(const struct dentry *dentry, struct qstr *qstr) { return isofs_hashi_common(dentry, qstr, 0); } static int isofs_dentry_cmpi(const struct dentry *dentry, unsigned int len, const char *str, const struct qstr *name) { return isofs_dentry_cmp_common(len, str, name, 0, 1); } #ifdef CONFIG_JOLIET /* * Compute the hash for the isofs name corresponding to the dentry. */ static int isofs_hash_common(const struct dentry *dentry, struct qstr *qstr, int ms) { const char *name; int len; len = qstr->len; name = qstr->name; if (ms) { while (len && name[len-1] == '.') len--; } qstr->hash = full_name_hash(dentry, name, len); return 0; } static int isofs_hash_ms(const struct dentry *dentry, struct qstr *qstr) { return isofs_hash_common(dentry, qstr, 1); } static int isofs_hashi_ms(const struct dentry *dentry, struct qstr *qstr) { return isofs_hashi_common(dentry, qstr, 1); } static int isofs_dentry_cmp_ms(const struct dentry *dentry, unsigned int len, const char *str, const struct qstr *name) { return isofs_dentry_cmp_common(len, str, name, 1, 0); } static int isofs_dentry_cmpi_ms(const struct dentry *dentry, unsigned int len, const char *str, const struct qstr *name) { return isofs_dentry_cmp_common(len, str, name, 1, 1); } #endif enum { Opt_block, Opt_check, Opt_cruft, Opt_gid, Opt_ignore, Opt_iocharset, Opt_map, Opt_mode, Opt_nojoliet, Opt_norock, Opt_sb, Opt_session, Opt_uid, Opt_unhide, Opt_utf8, Opt_err, Opt_nocompress, Opt_hide, Opt_showassoc, Opt_dmode, Opt_overriderockperm, }; static const struct constant_table isofs_param_map[] = { {"acorn", 'a'}, {"a", 'a'}, {"normal", 'n'}, {"n", 'n'}, {"off", 'o'}, {"o", 'o'}, {} }; static const struct constant_table isofs_param_check[] = { {"relaxed", 'r'}, {"r", 'r'}, {"strict", 's'}, {"s", 's'}, {} }; static const struct fs_parameter_spec isofs_param_spec[] = { fsparam_flag ("norock", Opt_norock), fsparam_flag ("nojoliet", Opt_nojoliet), fsparam_flag ("unhide", Opt_unhide), fsparam_flag ("hide", Opt_hide), fsparam_flag ("showassoc", Opt_showassoc), fsparam_flag ("cruft", Opt_cruft), fsparam_flag ("utf8", Opt_utf8), fsparam_string ("iocharset", Opt_iocharset), fsparam_enum ("map", Opt_map, isofs_param_map), fsparam_u32 ("session", Opt_session), fsparam_u32 ("sbsector", Opt_sb), fsparam_enum ("check", Opt_check, isofs_param_check), fsparam_uid ("uid", Opt_uid), fsparam_gid ("gid", Opt_gid), /* Note: mode/dmode historically accepted %u not strictly %o */ fsparam_u32 ("mode", Opt_mode), fsparam_u32 ("dmode", Opt_dmode), fsparam_flag ("overriderockperm", Opt_overriderockperm), fsparam_u32 ("block", Opt_block), fsparam_string ("conv", Opt_ignore), fsparam_flag ("nocompress", Opt_nocompress), {} }; static int isofs_parse_param(struct fs_context *fc, struct fs_parameter *param) { struct isofs_options *popt = fc->fs_private; struct fs_parse_result result; int opt; unsigned int n; /* There are no remountable options */ if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) return 0; opt = fs_parse(fc, isofs_param_spec, param, &result); if (opt < 0) return opt; switch (opt) { case Opt_norock: popt->rock = 0; break; case Opt_nojoliet: popt->joliet = 0; break; case Opt_hide: popt->hide = 1; break; case Opt_unhide: case Opt_showassoc: popt->showassoc = 1; break; case Opt_cruft: popt->cruft = 1; break; #ifdef CONFIG_JOLIET case Opt_utf8: kfree(popt->iocharset); popt->iocharset = kstrdup("utf8", GFP_KERNEL); if (!popt->iocharset) return -ENOMEM; break; case Opt_iocharset: kfree(popt->iocharset); popt->iocharset = kstrdup(param->string, GFP_KERNEL); if (!popt->iocharset) return -ENOMEM; break; #endif case Opt_map: popt->map = result.uint_32; break; case Opt_session: n = result.uint_32; /* * Track numbers are supposed to be in range 1-99, the * mount option starts indexing at 0. */ if (n >= 99) return -EINVAL; popt->session = n + 1; break; case Opt_sb: popt->sbsector = result.uint_32; break; case Opt_check: popt->check = result.uint_32; break; case Opt_ignore: break; case Opt_uid: popt->uid = result.uid; popt->uid_set = 1; break; case Opt_gid: popt->gid = result.gid; popt->gid_set = 1; break; case Opt_mode: popt->fmode = result.uint_32; break; case Opt_dmode: popt->dmode = result.uint_32; break; case Opt_overriderockperm: popt->overriderockperm = 1; break; case Opt_block: n = result.uint_32; if (n != 512 && n != 1024 && n != 2048) return -EINVAL; popt->blocksize = n; break; case Opt_nocompress: popt->nocompress = 1; break; default: return -EINVAL; } return 0; } /* * Display the mount options in /proc/mounts. */ static int isofs_show_options(struct seq_file *m, struct dentry *root) { struct isofs_sb_info *sbi = ISOFS_SB(root->d_sb); if (!sbi->s_rock) seq_puts(m, ",norock"); else if (!sbi->s_joliet_level) seq_puts(m, ",nojoliet"); if (sbi->s_cruft) seq_puts(m, ",cruft"); if (sbi->s_hide) seq_puts(m, ",hide"); if (sbi->s_nocompress) seq_puts(m, ",nocompress"); if (sbi->s_overriderockperm) seq_puts(m, ",overriderockperm"); if (sbi->s_showassoc) seq_puts(m, ",showassoc"); if (sbi->s_check) seq_printf(m, ",check=%c", sbi->s_check); if (sbi->s_mapping) seq_printf(m, ",map=%c", sbi->s_mapping); if (sbi->s_session != 255) seq_printf(m, ",session=%u", sbi->s_session - 1); if (sbi->s_sbsector != -1) seq_printf(m, ",sbsector=%u", sbi->s_sbsector); if (root->d_sb->s_blocksize != 1024) seq_printf(m, ",blocksize=%lu", root->d_sb->s_blocksize); if (sbi->s_uid_set) seq_printf(m, ",uid=%u", from_kuid_munged(&init_user_ns, sbi->s_uid)); if (sbi->s_gid_set) seq_printf(m, ",gid=%u", from_kgid_munged(&init_user_ns, sbi->s_gid)); if (sbi->s_dmode != ISOFS_INVALID_MODE) seq_printf(m, ",dmode=%o", sbi->s_dmode); if (sbi->s_fmode != ISOFS_INVALID_MODE) seq_printf(m, ",fmode=%o", sbi->s_fmode); #ifdef CONFIG_JOLIET if (sbi->s_nls_iocharset) seq_printf(m, ",iocharset=%s", sbi->s_nls_iocharset->charset); else seq_puts(m, ",iocharset=utf8"); #endif return 0; } /* * look if the driver can tell the multi session redirection value * * don't change this if you don't know what you do, please! * Multisession is legal only with XA disks. * A non-XA disk with more than one volume descriptor may do it right, but * usually is written in a nowhere standardized "multi-partition" manner. * Multisession uses absolute addressing (solely the first frame of the whole * track is #0), multi-partition uses relative addressing (each first frame of * each track is #0), and a track is not a session. * * A broken CDwriter software or drive firmware does not set new standards, * at least not if conflicting with the existing ones. * * emoenke@gwdg.de */ #define WE_OBEY_THE_WRITTEN_STANDARDS 1 static unsigned int isofs_get_last_session(struct super_block *sb, s32 session) { struct cdrom_device_info *cdi = disk_to_cdi(sb->s_bdev->bd_disk); unsigned int vol_desc_start = 0; if (session > 0) { struct cdrom_tocentry te; if (!cdi) return 0; te.cdte_track = session; te.cdte_format = CDROM_LBA; if (cdrom_read_tocentry(cdi, &te) == 0) { printk(KERN_DEBUG "ISOFS: Session %d start %d type %d\n", session, te.cdte_addr.lba, te.cdte_ctrl & CDROM_DATA_TRACK); if ((te.cdte_ctrl & CDROM_DATA_TRACK) == 4) return te.cdte_addr.lba; } printk(KERN_ERR "ISOFS: Invalid session number or type of track\n"); } if (cdi) { struct cdrom_multisession ms_info; ms_info.addr_format = CDROM_LBA; if (cdrom_multisession(cdi, &ms_info) == 0) { #if WE_OBEY_THE_WRITTEN_STANDARDS /* necessary for a valid ms_info.addr */ if (ms_info.xa_flag) #endif vol_desc_start = ms_info.addr.lba; } } return vol_desc_start; } /* * Check if root directory is empty (has less than 3 files). * * Used to detect broken CDs where ISO root directory is empty but Joliet root * directory is OK. If such CD has Rock Ridge extensions, they will be disabled * (and Joliet used instead) or else no files would be visible. */ static bool rootdir_empty(struct super_block *sb, unsigned long block) { int offset = 0, files = 0, de_len; struct iso_directory_record *de; struct buffer_head *bh; bh = sb_bread(sb, block); if (!bh) return true; while (files < 3) { de = (struct iso_directory_record *) (bh->b_data + offset); de_len = *(unsigned char *) de; if (de_len == 0) break; files++; offset += de_len; } brelse(bh); return files < 3; } /* * Initialize the superblock and read the root inode. */ static int isofs_fill_super(struct super_block *s, struct fs_context *fc) { struct buffer_head *bh = NULL, *pri_bh = NULL; struct hs_primary_descriptor *h_pri = NULL; struct iso_primary_descriptor *pri = NULL; struct iso_supplementary_descriptor *sec = NULL; struct iso_directory_record *rootp; struct inode *inode; struct isofs_options *opt = fc->fs_private; struct isofs_sb_info *sbi; unsigned long first_data_zone; int joliet_level = 0; int iso_blknum, block; int orig_zonesize; int table, error = -EINVAL; unsigned int vol_desc_start; int silent = fc->sb_flags & SB_SILENT; sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); if (!sbi) return -ENOMEM; s->s_fs_info = sbi; /* * First of all, get the hardware blocksize for this device. * If we don't know what it is, or the hardware blocksize is * larger than the blocksize the user specified, then use * that value. */ /* * What if bugger tells us to go beyond page size? */ if (bdev_logical_block_size(s->s_bdev) > 2048) { printk(KERN_WARNING "ISOFS: unsupported/invalid hardware sector size %d\n", bdev_logical_block_size(s->s_bdev)); goto out_freesbi; } opt->blocksize = sb_min_blocksize(s, opt->blocksize); sbi->s_high_sierra = 0; /* default is iso9660 */ sbi->s_session = opt->session; sbi->s_sbsector = opt->sbsector; vol_desc_start = (opt->sbsector != -1) ? opt->sbsector : isofs_get_last_session(s, opt->session); for (iso_blknum = vol_desc_start+16; iso_blknum < vol_desc_start+100; iso_blknum++) { struct hs_volume_descriptor *hdp; struct iso_volume_descriptor *vdp; block = iso_blknum << (ISOFS_BLOCK_BITS - s->s_blocksize_bits); if (!(bh = sb_bread(s, block))) goto out_no_read; vdp = (struct iso_volume_descriptor *)bh->b_data; hdp = (struct hs_volume_descriptor *)bh->b_data; /* * Due to the overlapping physical location of the descriptors, * ISO CDs can match hdp->id==HS_STANDARD_ID as well. To ensure * proper identification in this case, we first check for ISO. */ if (strncmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) == 0) { if (isonum_711(vdp->type) == ISO_VD_END) break; if (isonum_711(vdp->type) == ISO_VD_PRIMARY) { if (!pri) { pri = (struct iso_primary_descriptor *)vdp; /* Save the buffer in case we need it ... */ pri_bh = bh; bh = NULL; } } #ifdef CONFIG_JOLIET else if (isonum_711(vdp->type) == ISO_VD_SUPPLEMENTARY) { sec = (struct iso_supplementary_descriptor *)vdp; if (sec->escape[0] == 0x25 && sec->escape[1] == 0x2f) { if (opt->joliet) { if (sec->escape[2] == 0x40) joliet_level = 1; else if (sec->escape[2] == 0x43) joliet_level = 2; else if (sec->escape[2] == 0x45) joliet_level = 3; printk(KERN_DEBUG "ISO 9660 Extensions: " "Microsoft Joliet Level %d\n", joliet_level); } goto root_found; } else { /* Unknown supplementary volume descriptor */ sec = NULL; } } #endif } else { if (strncmp (hdp->id, HS_STANDARD_ID, sizeof hdp->id) == 0) { if (isonum_711(hdp->type) != ISO_VD_PRIMARY) goto out_freebh; sbi->s_high_sierra = 1; opt->rock = 0; h_pri = (struct hs_primary_descriptor *)vdp; goto root_found; } } /* Just skip any volume descriptors we don't recognize */ brelse(bh); bh = NULL; } /* * If we fall through, either no volume descriptor was found, * or else we passed a primary descriptor looking for others. */ if (!pri) goto out_unknown_format; brelse(bh); bh = pri_bh; pri_bh = NULL; root_found: /* We don't support read-write mounts */ if (!sb_rdonly(s)) { error = -EACCES; goto out_freebh; } if (joliet_level && (!pri || !opt->rock)) { /* This is the case of Joliet with the norock mount flag. * A disc with both Joliet and Rock Ridge is handled later */ pri = (struct iso_primary_descriptor *) sec; } if(sbi->s_high_sierra){ rootp = (struct iso_directory_record *) h_pri->root_directory_record; sbi->s_nzones = isonum_733(h_pri->volume_space_size); sbi->s_log_zone_size = isonum_723(h_pri->logical_block_size); sbi->s_max_size = isonum_733(h_pri->volume_space_size); } else { if (!pri) goto out_freebh; rootp = (struct iso_directory_record *) pri->root_directory_record; sbi->s_nzones = isonum_733(pri->volume_space_size); sbi->s_log_zone_size = isonum_723(pri->logical_block_size); sbi->s_max_size = isonum_733(pri->volume_space_size); } sbi->s_ninodes = 0; /* No way to figure this out easily */ orig_zonesize = sbi->s_log_zone_size; /* * If the zone size is smaller than the hardware sector size, * this is a fatal error. This would occur if the disc drive * had sectors that were 2048 bytes, but the filesystem had * blocks that were 512 bytes (which should only very rarely * happen.) */ if (orig_zonesize < opt->blocksize) goto out_bad_size; /* RDE: convert log zone size to bit shift */ switch (sbi->s_log_zone_size) { case 512: sbi->s_log_zone_size = 9; break; case 1024: sbi->s_log_zone_size = 10; break; case 2048: sbi->s_log_zone_size = 11; break; default: goto out_bad_zone_size; } s->s_magic = ISOFS_SUPER_MAGIC; /* * With multi-extent files, file size is only limited by the maximum * size of a file system, which is 8 TB. */ s->s_maxbytes = 0x80000000000LL; /* ECMA-119 timestamp from 1900/1/1 with tz offset */ s->s_time_min = mktime64(1900, 1, 1, 0, 0, 0) - MAX_TZ_OFFSET; s->s_time_max = mktime64(U8_MAX+1900, 12, 31, 23, 59, 59) + MAX_TZ_OFFSET; /* Set this for reference. Its not currently used except on write which we don't have .. */ first_data_zone = isonum_733(rootp->extent) + isonum_711(rootp->ext_attr_length); sbi->s_firstdatazone = first_data_zone; #ifndef BEQUIET printk(KERN_DEBUG "ISOFS: Max size:%ld Log zone size:%ld\n", sbi->s_max_size, 1UL << sbi->s_log_zone_size); printk(KERN_DEBUG "ISOFS: First datazone:%ld\n", sbi->s_firstdatazone); if(sbi->s_high_sierra) printk(KERN_DEBUG "ISOFS: Disc in High Sierra format.\n"); #endif /* * If the Joliet level is set, we _may_ decide to use the * secondary descriptor, but can't be sure until after we * read the root inode. But before reading the root inode * we may need to change the device blocksize, and would * rather release the old buffer first. So, we cache the * first_data_zone value from the secondary descriptor. */ if (joliet_level) { pri = (struct iso_primary_descriptor *) sec; rootp = (struct iso_directory_record *) pri->root_directory_record; first_data_zone = isonum_733(rootp->extent) + isonum_711(rootp->ext_attr_length); } /* * We're all done using the volume descriptor, and may need * to change the device blocksize, so release the buffer now. */ brelse(pri_bh); brelse(bh); /* * Force the blocksize to 512 for 512 byte sectors. The file * read primitives really get it wrong in a bad way if we don't * do this. * * Note - we should never be setting the blocksize to something * less than the hardware sector size for the device. If we * do, we would end up having to read larger buffers and split * out portions to satisfy requests. * * Note2- the idea here is that we want to deal with the optimal * zonesize in the filesystem. If we have it set to something less, * then we have horrible problems with trying to piece together * bits of adjacent blocks in order to properly read directory * entries. By forcing the blocksize in this way, we ensure * that we will never be required to do this. */ sb_set_blocksize(s, orig_zonesize); sbi->s_nls_iocharset = NULL; #ifdef CONFIG_JOLIET if (joliet_level) { char *p = opt->iocharset ? opt->iocharset : CONFIG_NLS_DEFAULT; if (strcmp(p, "utf8") != 0) { sbi->s_nls_iocharset = opt->iocharset ? load_nls(opt->iocharset) : load_nls_default(); if (!sbi->s_nls_iocharset) goto out_freesbi; } } #endif s->s_op = &isofs_sops; s->s_export_op = &isofs_export_ops; sbi->s_mapping = opt->map; sbi->s_rock = (opt->rock ? 2 : 0); sbi->s_rock_offset = -1; /* initial offset, will guess until SP is found*/ sbi->s_cruft = opt->cruft; sbi->s_hide = opt->hide; sbi->s_showassoc = opt->showassoc; sbi->s_uid = opt->uid; sbi->s_gid = opt->gid; sbi->s_uid_set = opt->uid_set; sbi->s_gid_set = opt->gid_set; sbi->s_nocompress = opt->nocompress; sbi->s_overriderockperm = opt->overriderockperm; /* * It would be incredibly stupid to allow people to mark every file * on the disk as suid, so we merely allow them to set the default * permissions. */ if (opt->fmode != ISOFS_INVALID_MODE) sbi->s_fmode = opt->fmode & 0777; else sbi->s_fmode = ISOFS_INVALID_MODE; if (opt->dmode != ISOFS_INVALID_MODE) sbi->s_dmode = opt->dmode & 0777; else sbi->s_dmode = ISOFS_INVALID_MODE; /* * Read the root inode, which _may_ result in changing * the s_rock flag. Once we have the final s_rock value, * we then decide whether to use the Joliet descriptor. */ inode = isofs_iget(s, sbi->s_firstdatazone, 0); /* * Fix for broken CDs with a corrupt root inode but a correct Joliet * root directory. */ if (IS_ERR(inode)) { if (joliet_level && sbi->s_firstdatazone != first_data_zone) { printk(KERN_NOTICE "ISOFS: root inode is unusable. " "Disabling Rock Ridge and switching to Joliet."); sbi->s_rock = 0; inode = NULL; } else { goto out_no_root; } } /* * Fix for broken CDs with Rock Ridge and empty ISO root directory but * correct Joliet root directory. */ if (sbi->s_rock == 1 && joliet_level && rootdir_empty(s, sbi->s_firstdatazone)) { printk(KERN_NOTICE "ISOFS: primary root directory is empty. " "Disabling Rock Ridge and switching to Joliet."); sbi->s_rock = 0; } /* * If this disk has both Rock Ridge and Joliet on it, then we * want to use Rock Ridge by default. This can be overridden * by using the norock mount option. There is still one other * possibility that is not taken into account: a Rock Ridge * CD with Unicode names. Until someone sees such a beast, it * will not be supported. */ if (sbi->s_rock == 1) { joliet_level = 0; } else if (joliet_level) { sbi->s_rock = 0; if (sbi->s_firstdatazone != first_data_zone) { sbi->s_firstdatazone = first_data_zone; printk(KERN_DEBUG "ISOFS: changing to secondary root\n"); iput(inode); inode = isofs_iget(s, sbi->s_firstdatazone, 0); if (IS_ERR(inode)) goto out_no_root; } } if (opt->check == 'u') { /* Only Joliet is case insensitive by default */ if (joliet_level) opt->check = 'r'; else opt->check = 's'; } sbi->s_joliet_level = joliet_level; /* Make sure the root inode is a directory */ if (!S_ISDIR(inode->i_mode)) { printk(KERN_WARNING "isofs_fill_super: root inode is not a directory. " "Corrupted media?\n"); goto out_iput; } table = 0; if (joliet_level) table += 2; if (opt->check == 'r') table++; sbi->s_check = opt->check; if (table) s->s_d_op = &isofs_dentry_ops[table - 1]; /* get the root dentry */ s->s_root = d_make_root(inode); if (!(s->s_root)) { error = -ENOMEM; goto out_no_inode; } kfree(opt->iocharset); return 0; /* * Display error messages and free resources. */ out_iput: iput(inode); goto out_no_inode; out_no_root: error = PTR_ERR(inode); if (error != -ENOMEM) printk(KERN_WARNING "%s: get root inode failed\n", __func__); out_no_inode: #ifdef CONFIG_JOLIET unload_nls(sbi->s_nls_iocharset); #endif goto out_freesbi; out_no_read: printk(KERN_WARNING "%s: bread failed, dev=%s, iso_blknum=%d, block=%d\n", __func__, s->s_id, iso_blknum, block); goto out_freebh; out_bad_zone_size: printk(KERN_WARNING "ISOFS: Bad logical zone size %ld\n", sbi->s_log_zone_size); goto out_freebh; out_bad_size: printk(KERN_WARNING "ISOFS: Logical zone size(%d) < hardware blocksize(%u)\n", orig_zonesize, opt->blocksize); goto out_freebh; out_unknown_format: if (!silent) printk(KERN_WARNING "ISOFS: Unable to identify CD-ROM format.\n"); out_freebh: brelse(bh); brelse(pri_bh); out_freesbi: kfree(opt->iocharset); kfree(sbi); s->s_fs_info = NULL; return error; } static int isofs_statfs (struct dentry *dentry, struct kstatfs *buf) { struct super_block *sb = dentry->d_sb; u64 id = huge_encode_dev(sb->s_bdev->bd_dev); buf->f_type = ISOFS_SUPER_MAGIC; buf->f_bsize = sb->s_blocksize; buf->f_blocks = (ISOFS_SB(sb)->s_nzones << (ISOFS_SB(sb)->s_log_zone_size - sb->s_blocksize_bits)); buf->f_bfree = 0; buf->f_bavail = 0; buf->f_files = ISOFS_SB(sb)->s_ninodes; buf->f_ffree = 0; buf->f_fsid = u64_to_fsid(id); buf->f_namelen = NAME_MAX; return 0; } /* * Get a set of blocks; filling in buffer_heads if already allocated * or getblk() if they are not. Returns the number of blocks inserted * (-ve == error.) */ int isofs_get_blocks(struct inode *inode, sector_t iblock, struct buffer_head **bh, unsigned long nblocks) { unsigned long b_off = iblock; unsigned offset, sect_size; unsigned int firstext; unsigned long nextblk, nextoff; int section, rv, error; struct iso_inode_info *ei = ISOFS_I(inode); error = -EIO; rv = 0; if (iblock != b_off) { printk(KERN_DEBUG "%s: block number too large\n", __func__); goto abort; } offset = 0; firstext = ei->i_first_extent; sect_size = ei->i_section_size >> ISOFS_BUFFER_BITS(inode); nextblk = ei->i_next_section_block; nextoff = ei->i_next_section_offset; section = 0; while (nblocks) { /* If we are *way* beyond the end of the file, print a message. * Access beyond the end of the file up to the next page boundary * is normal, however because of the way the page cache works. * In this case, we just return 0 so that we can properly fill * the page with useless information without generating any * I/O errors. */ if (b_off > ((inode->i_size + PAGE_SIZE - 1) >> ISOFS_BUFFER_BITS(inode))) { printk(KERN_DEBUG "%s: block >= EOF (%lu, %llu)\n", __func__, b_off, (unsigned long long)inode->i_size); goto abort; } /* On the last section, nextblk == 0, section size is likely to * exceed sect_size by a partial block, and access beyond the * end of the file will reach beyond the section size, too. */ while (nextblk && (b_off >= (offset + sect_size))) { struct inode *ninode; offset += sect_size; ninode = isofs_iget(inode->i_sb, nextblk, nextoff); if (IS_ERR(ninode)) { error = PTR_ERR(ninode); goto abort; } firstext = ISOFS_I(ninode)->i_first_extent; sect_size = ISOFS_I(ninode)->i_section_size >> ISOFS_BUFFER_BITS(ninode); nextblk = ISOFS_I(ninode)->i_next_section_block; nextoff = ISOFS_I(ninode)->i_next_section_offset; iput(ninode); if (++section > 100) { printk(KERN_DEBUG "%s: More than 100 file sections ?!?" " aborting...\n", __func__); printk(KERN_DEBUG "%s: block=%lu firstext=%u sect_size=%u " "nextblk=%lu nextoff=%lu\n", __func__, b_off, firstext, (unsigned) sect_size, nextblk, nextoff); goto abort; } } if (*bh) { map_bh(*bh, inode->i_sb, firstext + b_off - offset); } else { *bh = sb_getblk(inode->i_sb, firstext+b_off-offset); if (!*bh) goto abort; } bh++; /* Next buffer head */ b_off++; /* Next buffer offset */ nblocks--; rv++; } error = 0; abort: return rv != 0 ? rv : error; } /* * Used by the standard interfaces. */ static int isofs_get_block(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create) { int ret; if (create) { printk(KERN_DEBUG "%s: Kernel tries to allocate a block\n", __func__); return -EROFS; } ret = isofs_get_blocks(inode, iblock, &bh_result, 1); return ret < 0 ? ret : 0; } static int isofs_bmap(struct inode *inode, sector_t block) { struct buffer_head dummy; int error; dummy.b_state = 0; dummy.b_blocknr = -1000; error = isofs_get_block(inode, block, &dummy, 0); if (!error) return dummy.b_blocknr; return 0; } struct buffer_head *isofs_bread(struct inode *inode, sector_t block) { sector_t blknr = isofs_bmap(inode, block); if (!blknr) return NULL; return sb_bread(inode->i_sb, blknr); } static int isofs_read_folio(struct file *file, struct folio *folio) { return mpage_read_folio(folio, isofs_get_block); } static void isofs_readahead(struct readahead_control *rac) { mpage_readahead(rac, isofs_get_block); } static sector_t _isofs_bmap(struct address_space *mapping, sector_t block) { return generic_block_bmap(mapping,block,isofs_get_block); } static const struct address_space_operations isofs_aops = { .read_folio = isofs_read_folio, .readahead = isofs_readahead, .bmap = _isofs_bmap }; static int isofs_read_level3_size(struct inode *inode) { unsigned long bufsize = ISOFS_BUFFER_SIZE(inode); int high_sierra = ISOFS_SB(inode->i_sb)->s_high_sierra; struct buffer_head *bh = NULL; unsigned long block, offset, block_saved, offset_saved; int i = 0; int more_entries = 0; struct iso_directory_record *tmpde = NULL; struct iso_inode_info *ei = ISOFS_I(inode); inode->i_size = 0; /* The first 16 blocks are reserved as the System Area. Thus, * no inodes can appear in block 0. We use this to flag that * this is the last section. */ ei->i_next_section_block = 0; ei->i_next_section_offset = 0; block = ei->i_iget5_block; offset = ei->i_iget5_offset; do { struct iso_directory_record *de; unsigned int de_len; if (!bh) { bh = sb_bread(inode->i_sb, block); if (!bh) goto out_noread; } de = (struct iso_directory_record *) (bh->b_data + offset); de_len = *(unsigned char *) de; if (de_len == 0) { brelse(bh); bh = NULL; ++block; offset = 0; continue; } block_saved = block; offset_saved = offset; offset += de_len; /* Make sure we have a full directory entry */ if (offset >= bufsize) { int slop = bufsize - offset + de_len; if (!tmpde) { tmpde = kmalloc(256, GFP_KERNEL); if (!tmpde) goto out_nomem; } memcpy(tmpde, de, slop); offset &= bufsize - 1; block++; brelse(bh); bh = NULL; if (offset) { bh = sb_bread(inode->i_sb, block); if (!bh) goto out_noread; memcpy((void *)tmpde+slop, bh->b_data, offset); } de = tmpde; } inode->i_size += isonum_733(de->size); if (i == 1) { ei->i_next_section_block = block_saved; ei->i_next_section_offset = offset_saved; } more_entries = de->flags[-high_sierra] & 0x80; i++; if (i > 100) goto out_toomany; } while (more_entries); out: kfree(tmpde); brelse(bh); return 0; out_nomem: brelse(bh); return -ENOMEM; out_noread: printk(KERN_INFO "ISOFS: unable to read i-node block %lu\n", block); kfree(tmpde); return -EIO; out_toomany: printk(KERN_INFO "%s: More than 100 file sections ?!?, aborting...\n" "isofs_read_level3_size: inode=%lu\n", __func__, inode->i_ino); goto out; } static int isofs_read_inode(struct inode *inode, int relocated) { struct super_block *sb = inode->i_sb; struct isofs_sb_info *sbi = ISOFS_SB(sb); unsigned long bufsize = ISOFS_BUFFER_SIZE(inode); unsigned long block; int high_sierra = sbi->s_high_sierra; struct buffer_head *bh; struct iso_directory_record *de; struct iso_directory_record *tmpde = NULL; unsigned int de_len; unsigned long offset; struct iso_inode_info *ei = ISOFS_I(inode); int ret = -EIO; block = ei->i_iget5_block; bh = sb_bread(inode->i_sb, block); if (!bh) goto out_badread; offset = ei->i_iget5_offset; de = (struct iso_directory_record *) (bh->b_data + offset); de_len = *(unsigned char *) de; if (de_len < sizeof(struct iso_directory_record)) goto fail; if (offset + de_len > bufsize) { int frag1 = bufsize - offset; tmpde = kmalloc(de_len, GFP_KERNEL); if (!tmpde) { ret = -ENOMEM; goto fail; } memcpy(tmpde, bh->b_data + offset, frag1); brelse(bh); bh = sb_bread(inode->i_sb, ++block); if (!bh) goto out_badread; memcpy((char *)tmpde+frag1, bh->b_data, de_len - frag1); de = tmpde; } inode->i_ino = isofs_get_ino(ei->i_iget5_block, ei->i_iget5_offset, ISOFS_BUFFER_BITS(inode)); /* Assume it is a normal-format file unless told otherwise */ ei->i_file_format = isofs_file_normal; if (de->flags[-high_sierra] & 2) { if (sbi->s_dmode != ISOFS_INVALID_MODE) inode->i_mode = S_IFDIR | sbi->s_dmode; else inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; set_nlink(inode, 1); /* * Set to 1. We know there are 2, but * the find utility tries to optimize * if it is 2, and it screws up. It is * easier to give 1 which tells find to * do it the hard way. */ } else { if (sbi->s_fmode != ISOFS_INVALID_MODE) { inode->i_mode = S_IFREG | sbi->s_fmode; } else { /* * Set default permissions: r-x for all. The disc * could be shared with DOS machines so virtually * anything could be a valid executable. */ inode->i_mode = S_IFREG | S_IRUGO | S_IXUGO; } set_nlink(inode, 1); } inode->i_uid = sbi->s_uid; inode->i_gid = sbi->s_gid; inode->i_blocks = 0; ei->i_format_parm[0] = 0; ei->i_format_parm[1] = 0; ei->i_format_parm[2] = 0; ei->i_section_size = isonum_733(de->size); if (de->flags[-high_sierra] & 0x80) { ret = isofs_read_level3_size(inode); if (ret < 0) goto fail; ret = -EIO; } else { ei->i_next_section_block = 0; ei->i_next_section_offset = 0; inode->i_size = isonum_733(de->size); } /* * Some dipshit decided to store some other bit of information * in the high byte of the file length. Truncate size in case * this CDROM was mounted with the cruft option. */ if (sbi->s_cruft) inode->i_size &= 0x00ffffff; if (de->interleave[0]) { printk(KERN_DEBUG "ISOFS: Interleaved files not (yet) supported.\n"); inode->i_size = 0; } /* I have no idea what file_unit_size is used for, so we will flag it for now */ if (de->file_unit_size[0] != 0) { printk(KERN_DEBUG "ISOFS: File unit size != 0 for ISO file (%ld).\n", inode->i_ino); } /* I have no idea what other flag bits are used for, so we will flag it for now */ #ifdef DEBUG if((de->flags[-high_sierra] & ~2)!= 0){ printk(KERN_DEBUG "ISOFS: Unusual flag settings for ISO file " "(%ld %x).\n", inode->i_ino, de->flags[-high_sierra]); } #endif inode_set_mtime_to_ts(inode, inode_set_atime_to_ts(inode, inode_set_ctime(inode, iso_date(de->date, high_sierra), 0))); ei->i_first_extent = (isonum_733(de->extent) + isonum_711(de->ext_attr_length)); /* Set the number of blocks for stat() - should be done before RR */ inode->i_blocks = (inode->i_size + 511) >> 9; /* * Now test for possible Rock Ridge extensions which will override * some of these numbers in the inode structure. */ if (!high_sierra) { parse_rock_ridge_inode(de, inode, relocated); /* if we want uid/gid set, override the rock ridge setting */ if (sbi->s_uid_set) inode->i_uid = sbi->s_uid; if (sbi->s_gid_set) inode->i_gid = sbi->s_gid; } /* Now set final access rights if overriding rock ridge setting */ if (S_ISDIR(inode->i_mode) && sbi->s_overriderockperm && sbi->s_dmode != ISOFS_INVALID_MODE) inode->i_mode = S_IFDIR | sbi->s_dmode; if (S_ISREG(inode->i_mode) && sbi->s_overriderockperm && sbi->s_fmode != ISOFS_INVALID_MODE) inode->i_mode = S_IFREG | sbi->s_fmode; /* Install the inode operations vector */ if (S_ISREG(inode->i_mode)) { inode->i_fop = &generic_ro_fops; switch (ei->i_file_format) { #ifdef CONFIG_ZISOFS case isofs_file_compressed: inode->i_data.a_ops = &zisofs_aops; break; #endif default: inode->i_data.a_ops = &isofs_aops; break; } } else if (S_ISDIR(inode->i_mode)) { inode->i_op = &isofs_dir_inode_operations; inode->i_fop = &isofs_dir_operations; } else if (S_ISLNK(inode->i_mode)) { inode->i_op = &page_symlink_inode_operations; inode_nohighmem(inode); inode->i_data.a_ops = &isofs_symlink_aops; } else /* XXX - parse_rock_ridge_inode() had already set i_rdev. */ init_special_inode(inode, inode->i_mode, inode->i_rdev); ret = 0; out: kfree(tmpde); brelse(bh); return ret; out_badread: printk(KERN_WARNING "ISOFS: unable to read i-node block\n"); fail: goto out; } struct isofs_iget5_callback_data { unsigned long block; unsigned long offset; }; static int isofs_iget5_test(struct inode *ino, void *data) { struct iso_inode_info *i = ISOFS_I(ino); struct isofs_iget5_callback_data *d = (struct isofs_iget5_callback_data*)data; return (i->i_iget5_block == d->block) && (i->i_iget5_offset == d->offset); } static int isofs_iget5_set(struct inode *ino, void *data) { struct iso_inode_info *i = ISOFS_I(ino); struct isofs_iget5_callback_data *d = (struct isofs_iget5_callback_data*)data; i->i_iget5_block = d->block; i->i_iget5_offset = d->offset; return 0; } /* Store, in the inode's containing structure, the block and block * offset that point to the underlying meta-data for the inode. The * code below is otherwise similar to the iget() code in * include/linux/fs.h */ struct inode *__isofs_iget(struct super_block *sb, unsigned long block, unsigned long offset, int relocated) { unsigned long hashval; struct inode *inode; struct isofs_iget5_callback_data data; long ret; if (offset >= 1ul << sb->s_blocksize_bits) return ERR_PTR(-EINVAL); data.block = block; data.offset = offset; hashval = (block << sb->s_blocksize_bits) | offset; inode = iget5_locked(sb, hashval, &isofs_iget5_test, &isofs_iget5_set, &data); if (!inode) return ERR_PTR(-ENOMEM); if (inode->i_state & I_NEW) { ret = isofs_read_inode(inode, relocated); if (ret < 0) { iget_failed(inode); inode = ERR_PTR(ret); } else { unlock_new_inode(inode); } } return inode; } static int isofs_get_tree(struct fs_context *fc) { return get_tree_bdev(fc, isofs_fill_super); } static void isofs_free_fc(struct fs_context *fc) { kfree(fc->fs_private); } static const struct fs_context_operations isofs_context_ops = { .parse_param = isofs_parse_param, .get_tree = isofs_get_tree, .reconfigure = isofs_reconfigure, .free = isofs_free_fc, }; static int isofs_init_fs_context(struct fs_context *fc) { struct isofs_options *opt; opt = kzalloc(sizeof(*opt), GFP_KERNEL); if (!opt) return -ENOMEM; opt->map = 'n'; opt->rock = 1; opt->joliet = 1; opt->cruft = 0; opt->hide = 0; opt->showassoc = 0; opt->check = 'u'; /* unset */ opt->nocompress = 0; opt->blocksize = 1024; opt->fmode = opt->dmode = ISOFS_INVALID_MODE; opt->uid_set = 0; opt->gid_set = 0; opt->gid = GLOBAL_ROOT_GID; opt->uid = GLOBAL_ROOT_UID; opt->iocharset = NULL; opt->overriderockperm = 0; opt->session = -1; opt->sbsector = -1; fc->fs_private = opt; fc->ops = &isofs_context_ops; return 0; } static struct file_system_type iso9660_fs_type = { .owner = THIS_MODULE, .name = "iso9660", .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, .init_fs_context = isofs_init_fs_context, .parameters = isofs_param_spec, }; MODULE_ALIAS_FS("iso9660"); MODULE_ALIAS("iso9660"); static int __init init_iso9660_fs(void) { int err = init_inodecache(); if (err) goto out; #ifdef CONFIG_ZISOFS err = zisofs_init(); if (err) goto out1; #endif err = register_filesystem(&iso9660_fs_type); if (err) goto out2; return 0; out2: #ifdef CONFIG_ZISOFS zisofs_cleanup(); out1: #endif destroy_inodecache(); out: return err; } static void __exit exit_iso9660_fs(void) { unregister_filesystem(&iso9660_fs_type); #ifdef CONFIG_ZISOFS zisofs_cleanup(); #endif destroy_inodecache(); } module_init(init_iso9660_fs) module_exit(exit_iso9660_fs) MODULE_DESCRIPTION("ISO 9660 CDROM file system support"); MODULE_LICENSE("GPL");
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