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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/udf/super.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'fs/udf/super.c')
-rw-r--r-- | fs/udf/super.c | 1934 |
1 files changed, 1934 insertions, 0 deletions
diff --git a/fs/udf/super.c b/fs/udf/super.c new file mode 100644 index 0000000..15bd4f2 --- /dev/null +++ b/fs/udf/super.c @@ -0,0 +1,1934 @@ +/* + * super.c + * + * PURPOSE + * Super block routines for the OSTA-UDF(tm) filesystem. + * + * DESCRIPTION + * OSTA-UDF(tm) = Optical Storage Technology Association + * Universal Disk Format. + * + * This code is based on version 2.00 of the UDF specification, + * and revision 3 of the ECMA 167 standard [equivalent to ISO 13346]. + * http://www.osta.org/ + * http://www.ecma.ch/ + * http://www.iso.org/ + * + * CONTACTS + * E-mail regarding any portion of the Linux UDF file system should be + * directed to the development team mailing list (run by majordomo): + * linux_udf@hpesjro.fc.hp.com + * + * COPYRIGHT + * This file is distributed under the terms of the GNU General Public + * License (GPL). Copies of the GPL can be obtained from: + * ftp://prep.ai.mit.edu/pub/gnu/GPL + * Each contributing author retains all rights to their own work. + * + * (C) 1998 Dave Boynton + * (C) 1998-2004 Ben Fennema + * (C) 2000 Stelias Computing Inc + * + * HISTORY + * + * 09/24/98 dgb changed to allow compiling outside of kernel, and + * added some debugging. + * 10/01/98 dgb updated to allow (some) possibility of compiling w/2.0.34 + * 10/16/98 attempting some multi-session support + * 10/17/98 added freespace count for "df" + * 11/11/98 gr added novrs option + * 11/26/98 dgb added fileset,anchor mount options + * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced vol descs + * rewrote option handling based on isofs + * 12/20/98 find the free space bitmap (if it exists) + */ + +#include "udfdecl.h" + +#include <linux/config.h> +#include <linux/blkdev.h> +#include <linux/slab.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/parser.h> +#include <linux/stat.h> +#include <linux/cdrom.h> +#include <linux/nls.h> +#include <linux/smp_lock.h> +#include <linux/buffer_head.h> +#include <linux/vfs.h> +#include <linux/vmalloc.h> +#include <asm/byteorder.h> + +#include <linux/udf_fs.h> +#include "udf_sb.h" +#include "udf_i.h" + +#include <linux/init.h> +#include <asm/uaccess.h> + +#define VDS_POS_PRIMARY_VOL_DESC 0 +#define VDS_POS_UNALLOC_SPACE_DESC 1 +#define VDS_POS_LOGICAL_VOL_DESC 2 +#define VDS_POS_PARTITION_DESC 3 +#define VDS_POS_IMP_USE_VOL_DESC 4 +#define VDS_POS_VOL_DESC_PTR 5 +#define VDS_POS_TERMINATING_DESC 6 +#define VDS_POS_LENGTH 7 + +static char error_buf[1024]; + +/* These are the "meat" - everything else is stuffing */ +static int udf_fill_super(struct super_block *, void *, int); +static void udf_put_super(struct super_block *); +static void udf_write_super(struct super_block *); +static int udf_remount_fs(struct super_block *, int *, char *); +static int udf_check_valid(struct super_block *, int, int); +static int udf_vrs(struct super_block *sb, int silent); +static int udf_load_partition(struct super_block *, kernel_lb_addr *); +static int udf_load_logicalvol(struct super_block *, struct buffer_head *, kernel_lb_addr *); +static void udf_load_logicalvolint(struct super_block *, kernel_extent_ad); +static void udf_find_anchor(struct super_block *); +static int udf_find_fileset(struct super_block *, kernel_lb_addr *, kernel_lb_addr *); +static void udf_load_pvoldesc(struct super_block *, struct buffer_head *); +static void udf_load_fileset(struct super_block *, struct buffer_head *, kernel_lb_addr *); +static void udf_load_partdesc(struct super_block *, struct buffer_head *); +static void udf_open_lvid(struct super_block *); +static void udf_close_lvid(struct super_block *); +static unsigned int udf_count_free(struct super_block *); +static int udf_statfs(struct super_block *, struct kstatfs *); + +/* UDF filesystem type */ +static struct super_block *udf_get_sb(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) +{ + return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super); +} + +static struct file_system_type udf_fstype = { + .owner = THIS_MODULE, + .name = "udf", + .get_sb = udf_get_sb, + .kill_sb = kill_block_super, + .fs_flags = FS_REQUIRES_DEV, +}; + +static kmem_cache_t * udf_inode_cachep; + +static struct inode *udf_alloc_inode(struct super_block *sb) +{ + struct udf_inode_info *ei; + ei = (struct udf_inode_info *)kmem_cache_alloc(udf_inode_cachep, SLAB_KERNEL); + if (!ei) + return NULL; + return &ei->vfs_inode; +} + +static void udf_destroy_inode(struct inode *inode) +{ + kmem_cache_free(udf_inode_cachep, UDF_I(inode)); +} + +static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) +{ + struct udf_inode_info *ei = (struct udf_inode_info *) foo; + + if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == + SLAB_CTOR_CONSTRUCTOR) + { + ei->i_ext.i_data = NULL; + inode_init_once(&ei->vfs_inode); + } +} + +static int init_inodecache(void) +{ + udf_inode_cachep = kmem_cache_create("udf_inode_cache", + sizeof(struct udf_inode_info), + 0, SLAB_RECLAIM_ACCOUNT, + init_once, NULL); + if (udf_inode_cachep == NULL) + return -ENOMEM; + return 0; +} + +static void destroy_inodecache(void) +{ + if (kmem_cache_destroy(udf_inode_cachep)) + printk(KERN_INFO "udf_inode_cache: not all structures were freed\n"); +} + +/* Superblock operations */ +static struct super_operations udf_sb_ops = { + .alloc_inode = udf_alloc_inode, + .destroy_inode = udf_destroy_inode, + .write_inode = udf_write_inode, + .delete_inode = udf_delete_inode, + .clear_inode = udf_clear_inode, + .put_super = udf_put_super, + .write_super = udf_write_super, + .statfs = udf_statfs, + .remount_fs = udf_remount_fs, +}; + +struct udf_options +{ + unsigned char novrs; + unsigned int blocksize; + unsigned int session; + unsigned int lastblock; + unsigned int anchor; + unsigned int volume; + unsigned short partition; + unsigned int fileset; + unsigned int rootdir; + unsigned int flags; + mode_t umask; + gid_t gid; + uid_t uid; + struct nls_table *nls_map; +}; + +static int __init init_udf_fs(void) +{ + int err; + err = init_inodecache(); + if (err) + goto out1; + err = register_filesystem(&udf_fstype); + if (err) + goto out; + return 0; +out: + destroy_inodecache(); +out1: + return err; +} + +static void __exit exit_udf_fs(void) +{ + unregister_filesystem(&udf_fstype); + destroy_inodecache(); +} + +module_init(init_udf_fs) +module_exit(exit_udf_fs) + +/* + * udf_parse_options + * + * PURPOSE + * Parse mount options. + * + * DESCRIPTION + * The following mount options are supported: + * + * gid= Set the default group. + * umask= Set the default umask. + * uid= Set the default user. + * bs= Set the block size. + * unhide Show otherwise hidden files. + * undelete Show deleted files in lists. + * adinicb Embed data in the inode (default) + * noadinicb Don't embed data in the inode + * shortad Use short ad's + * longad Use long ad's (default) + * nostrict Unset strict conformance + * iocharset= Set the NLS character set + * + * The remaining are for debugging and disaster recovery: + * + * novrs Skip volume sequence recognition + * + * The following expect a offset from 0. + * + * session= Set the CDROM session (default= last session) + * anchor= Override standard anchor location. (default= 256) + * volume= Override the VolumeDesc location. (unused) + * partition= Override the PartitionDesc location. (unused) + * lastblock= Set the last block of the filesystem/ + * + * The following expect a offset from the partition root. + * + * fileset= Override the fileset block location. (unused) + * rootdir= Override the root directory location. (unused) + * WARNING: overriding the rootdir to a non-directory may + * yield highly unpredictable results. + * + * PRE-CONDITIONS + * options Pointer to mount options string. + * uopts Pointer to mount options variable. + * + * POST-CONDITIONS + * <return> 1 Mount options parsed okay. + * <return> 0 Error parsing mount options. + * + * HISTORY + * July 1, 1997 - Andrew E. Mileski + * Written, tested, and released. + */ + +enum { + Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, + Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, + Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, + Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, + Opt_rootdir, Opt_utf8, Opt_iocharset, + Opt_err +}; + +static match_table_t tokens = { + {Opt_novrs, "novrs"}, + {Opt_nostrict, "nostrict"}, + {Opt_bs, "bs=%u"}, + {Opt_unhide, "unhide"}, + {Opt_undelete, "undelete"}, + {Opt_noadinicb, "noadinicb"}, + {Opt_adinicb, "adinicb"}, + {Opt_shortad, "shortad"}, + {Opt_longad, "longad"}, + {Opt_gid, "gid=%u"}, + {Opt_uid, "uid=%u"}, + {Opt_umask, "umask=%o"}, + {Opt_session, "session=%u"}, + {Opt_lastblock, "lastblock=%u"}, + {Opt_anchor, "anchor=%u"}, + {Opt_volume, "volume=%u"}, + {Opt_partition, "partition=%u"}, + {Opt_fileset, "fileset=%u"}, + {Opt_rootdir, "rootdir=%u"}, + {Opt_utf8, "utf8"}, + {Opt_iocharset, "iocharset=%s"}, + {Opt_err, NULL} +}; + +static int +udf_parse_options(char *options, struct udf_options *uopt) +{ + char *p; + int option; + + uopt->novrs = 0; + uopt->blocksize = 2048; + uopt->partition = 0xFFFF; + uopt->session = 0xFFFFFFFF; + uopt->lastblock = 0; + uopt->anchor = 0; + uopt->volume = 0xFFFFFFFF; + uopt->rootdir = 0xFFFFFFFF; + uopt->fileset = 0xFFFFFFFF; + uopt->nls_map = NULL; + + if (!options) + return 1; + + while ((p = strsep(&options, ",")) != NULL) + { + substring_t args[MAX_OPT_ARGS]; + int token; + if (!*p) + continue; + + token = match_token(p, tokens, args); + switch (token) + { + case Opt_novrs: + uopt->novrs = 1; + case Opt_bs: + if (match_int(&args[0], &option)) + return 0; + uopt->blocksize = option; + break; + case Opt_unhide: + uopt->flags |= (1 << UDF_FLAG_UNHIDE); + break; + case Opt_undelete: + uopt->flags |= (1 << UDF_FLAG_UNDELETE); + break; + case Opt_noadinicb: + uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); + break; + case Opt_adinicb: + uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); + break; + case Opt_shortad: + uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); + break; + case Opt_longad: + uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); + break; + case Opt_gid: + if (match_int(args, &option)) + return 0; + uopt->gid = option; + break; + case Opt_uid: + if (match_int(args, &option)) + return 0; + uopt->uid = option; + break; + case Opt_umask: + if (match_octal(args, &option)) + return 0; + uopt->umask = option; + break; + case Opt_nostrict: + uopt->flags &= ~(1 << UDF_FLAG_STRICT); + break; + case Opt_session: + if (match_int(args, &option)) + return 0; + uopt->session = option; + break; + case Opt_lastblock: + if (match_int(args, &option)) + return 0; + uopt->lastblock = option; + break; + case Opt_anchor: + if (match_int(args, &option)) + return 0; + uopt->anchor = option; + break; + case Opt_volume: + if (match_int(args, &option)) + return 0; + uopt->volume = option; + break; + case Opt_partition: + if (match_int(args, &option)) + return 0; + uopt->partition = option; + break; + case Opt_fileset: + if (match_int(args, &option)) + return 0; + uopt->fileset = option; + break; + case Opt_rootdir: + if (match_int(args, &option)) + return 0; + uopt->rootdir = option; + break; + case Opt_utf8: + uopt->flags |= (1 << UDF_FLAG_UTF8); + break; +#ifdef CONFIG_UDF_NLS + case Opt_iocharset: + uopt->nls_map = load_nls(args[0].from); + uopt->flags |= (1 << UDF_FLAG_NLS_MAP); + break; +#endif + default: + printk(KERN_ERR "udf: bad mount option \"%s\" " + "or missing value\n", p); + return 0; + } + } + return 1; +} + +void +udf_write_super(struct super_block *sb) +{ + lock_kernel(); + if (!(sb->s_flags & MS_RDONLY)) + udf_open_lvid(sb); + sb->s_dirt = 0; + unlock_kernel(); +} + +static int +udf_remount_fs(struct super_block *sb, int *flags, char *options) +{ + struct udf_options uopt; + + uopt.flags = UDF_SB(sb)->s_flags ; + uopt.uid = UDF_SB(sb)->s_uid ; + uopt.gid = UDF_SB(sb)->s_gid ; + uopt.umask = UDF_SB(sb)->s_umask ; + + if ( !udf_parse_options(options, &uopt) ) + return -EINVAL; + + UDF_SB(sb)->s_flags = uopt.flags; + UDF_SB(sb)->s_uid = uopt.uid; + UDF_SB(sb)->s_gid = uopt.gid; + UDF_SB(sb)->s_umask = uopt.umask; + + if (UDF_SB_LVIDBH(sb)) { + int write_rev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev); + if (write_rev > UDF_MAX_WRITE_VERSION) + *flags |= MS_RDONLY; + } + + if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) + return 0; + if (*flags & MS_RDONLY) + udf_close_lvid(sb); + else + udf_open_lvid(sb); + + return 0; +} + +/* + * udf_set_blocksize + * + * PURPOSE + * Set the block size to be used in all transfers. + * + * DESCRIPTION + * To allow room for a DMA transfer, it is best to guess big when unsure. + * This routine picks 2048 bytes as the blocksize when guessing. This + * should be adequate until devices with larger block sizes become common. + * + * Note that the Linux kernel can currently only deal with blocksizes of + * 512, 1024, 2048, 4096, and 8192 bytes. + * + * PRE-CONDITIONS + * sb Pointer to _locked_ superblock. + * + * POST-CONDITIONS + * sb->s_blocksize Blocksize. + * sb->s_blocksize_bits log2 of blocksize. + * <return> 0 Blocksize is valid. + * <return> 1 Blocksize is invalid. + * + * HISTORY + * July 1, 1997 - Andrew E. Mileski + * Written, tested, and released. + */ +static int +udf_set_blocksize(struct super_block *sb, int bsize) +{ + if (!sb_min_blocksize(sb, bsize)) { + udf_debug("Bad block size (%d)\n", bsize); + printk(KERN_ERR "udf: bad block size (%d)\n", bsize); + return 0; + } + return sb->s_blocksize; +} + +static int +udf_vrs(struct super_block *sb, int silent) +{ + struct volStructDesc *vsd = NULL; + int sector = 32768; + int sectorsize; + struct buffer_head *bh = NULL; + int iso9660=0; + int nsr02=0; + int nsr03=0; + + /* Block size must be a multiple of 512 */ + if (sb->s_blocksize & 511) + return 0; + + if (sb->s_blocksize < sizeof(struct volStructDesc)) + sectorsize = sizeof(struct volStructDesc); + else + sectorsize = sb->s_blocksize; + + sector += (UDF_SB_SESSION(sb) << sb->s_blocksize_bits); + + udf_debug("Starting at sector %u (%ld byte sectors)\n", + (sector >> sb->s_blocksize_bits), sb->s_blocksize); + /* Process the sequence (if applicable) */ + for (;!nsr02 && !nsr03; sector += sectorsize) + { + /* Read a block */ + bh = udf_tread(sb, sector >> sb->s_blocksize_bits); + if (!bh) + break; + + /* Look for ISO descriptors */ + vsd = (struct volStructDesc *)(bh->b_data + + (sector & (sb->s_blocksize - 1))); + + if (vsd->stdIdent[0] == 0) + { + udf_release_data(bh); + break; + } + else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, VSD_STD_ID_LEN)) + { + iso9660 = sector; + switch (vsd->structType) + { + case 0: + udf_debug("ISO9660 Boot Record found\n"); + break; + case 1: + udf_debug("ISO9660 Primary Volume Descriptor found\n"); + break; + case 2: + udf_debug("ISO9660 Supplementary Volume Descriptor found\n"); + break; + case 3: + udf_debug("ISO9660 Volume Partition Descriptor found\n"); + break; + case 255: + udf_debug("ISO9660 Volume Descriptor Set Terminator found\n"); + break; + default: + udf_debug("ISO9660 VRS (%u) found\n", vsd->structType); + break; + } + } + else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, VSD_STD_ID_LEN)) + { + } + else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, VSD_STD_ID_LEN)) + { + udf_release_data(bh); + break; + } + else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, VSD_STD_ID_LEN)) + { + nsr02 = sector; + } + else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, VSD_STD_ID_LEN)) + { + nsr03 = sector; + } + udf_release_data(bh); + } + + if (nsr03) + return nsr03; + else if (nsr02) + return nsr02; + else if (sector - (UDF_SB_SESSION(sb) << sb->s_blocksize_bits) == 32768) + return -1; + else + return 0; +} + +/* + * udf_find_anchor + * + * PURPOSE + * Find an anchor volume descriptor. + * + * PRE-CONDITIONS + * sb Pointer to _locked_ superblock. + * lastblock Last block on media. + * + * POST-CONDITIONS + * <return> 1 if not found, 0 if ok + * + * HISTORY + * July 1, 1997 - Andrew E. Mileski + * Written, tested, and released. + */ +static void +udf_find_anchor(struct super_block *sb) +{ + int lastblock = UDF_SB_LASTBLOCK(sb); + struct buffer_head *bh = NULL; + uint16_t ident; + uint32_t location; + int i; + + if (lastblock) + { + int varlastblock = udf_variable_to_fixed(lastblock); + int last[] = { lastblock, lastblock - 2, + lastblock - 150, lastblock - 152, + varlastblock, varlastblock - 2, + varlastblock - 150, varlastblock - 152 }; + + lastblock = 0; + + /* Search for an anchor volume descriptor pointer */ + + /* according to spec, anchor is in either: + * block 256 + * lastblock-256 + * lastblock + * however, if the disc isn't closed, it could be 512 */ + + for (i=0; (!lastblock && i<sizeof(last)/sizeof(int)); i++) + { + if (last[i] < 0 || !(bh = sb_bread(sb, last[i]))) + { + ident = location = 0; + } + else + { + ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent); + location = le32_to_cpu(((tag *)bh->b_data)->tagLocation); + udf_release_data(bh); + } + + if (ident == TAG_IDENT_AVDP) + { + if (location == last[i] - UDF_SB_SESSION(sb)) + { + lastblock = UDF_SB_ANCHOR(sb)[0] = last[i] - UDF_SB_SESSION(sb); + UDF_SB_ANCHOR(sb)[1] = last[i] - 256 - UDF_SB_SESSION(sb); + } + else if (location == udf_variable_to_fixed(last[i]) - UDF_SB_SESSION(sb)) + { + UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); + lastblock = UDF_SB_ANCHOR(sb)[0] = udf_variable_to_fixed(last[i]) - UDF_SB_SESSION(sb); + UDF_SB_ANCHOR(sb)[1] = lastblock - 256 - UDF_SB_SESSION(sb); + } + else + udf_debug("Anchor found at block %d, location mismatch %d.\n", + last[i], location); + } + else if (ident == TAG_IDENT_FE || ident == TAG_IDENT_EFE) + { + lastblock = last[i]; + UDF_SB_ANCHOR(sb)[3] = 512; + } + else + { + if (last[i] < 256 || !(bh = sb_bread(sb, last[i] - 256))) + { + ident = location = 0; + } + else + { + ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent); + location = le32_to_cpu(((tag *)bh->b_data)->tagLocation); + udf_release_data(bh); + } + + if (ident == TAG_IDENT_AVDP && + location == last[i] - 256 - UDF_SB_SESSION(sb)) + { + lastblock = last[i]; + UDF_SB_ANCHOR(sb)[1] = last[i] - 256; + } + else + { + if (last[i] < 312 + UDF_SB_SESSION(sb) || !(bh = sb_bread(sb, last[i] - 312 - UDF_SB_SESSION(sb)))) + { + ident = location = 0; + } + else + { + ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent); + location = le32_to_cpu(((tag *)bh->b_data)->tagLocation); + udf_release_data(bh); + } + + if (ident == TAG_IDENT_AVDP && + location == udf_variable_to_fixed(last[i]) - 256) + { + UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); + lastblock = udf_variable_to_fixed(last[i]); + UDF_SB_ANCHOR(sb)[1] = lastblock - 256; + } + } + } + } + } + + if (!lastblock) + { + /* We havn't found the lastblock. check 312 */ + if ((bh = sb_bread(sb, 312 + UDF_SB_SESSION(sb)))) + { + ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent); + location = le32_to_cpu(((tag *)bh->b_data)->tagLocation); + udf_release_data(bh); + + if (ident == TAG_IDENT_AVDP && location == 256) + UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); + } + } + + for (i=0; i<sizeof(UDF_SB_ANCHOR(sb))/sizeof(int); i++) + { + if (UDF_SB_ANCHOR(sb)[i]) + { + if (!(bh = udf_read_tagged(sb, + UDF_SB_ANCHOR(sb)[i], UDF_SB_ANCHOR(sb)[i], &ident))) + { + UDF_SB_ANCHOR(sb)[i] = 0; + } + else + { + udf_release_data(bh); + if ((ident != TAG_IDENT_AVDP) && (i || + (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE))) + { + UDF_SB_ANCHOR(sb)[i] = 0; + } + } + } + } + + UDF_SB_LASTBLOCK(sb) = lastblock; +} + +static int +udf_find_fileset(struct super_block *sb, kernel_lb_addr *fileset, kernel_lb_addr *root) +{ + struct buffer_head *bh = NULL; + long lastblock; + uint16_t ident; + + if (fileset->logicalBlockNum != 0xFFFFFFFF || + fileset->partitionReferenceNum != 0xFFFF) + { + bh = udf_read_ptagged(sb, *fileset, 0, &ident); + + if (!bh) + return 1; + else if (ident != TAG_IDENT_FSD) + { + udf_release_data(bh); + return 1; + } + + } + + if (!bh) /* Search backwards through the partitions */ + { + kernel_lb_addr newfileset; + + return 1; + + for (newfileset.partitionReferenceNum=UDF_SB_NUMPARTS(sb)-1; + (newfileset.partitionReferenceNum != 0xFFFF && + fileset->logicalBlockNum == 0xFFFFFFFF && + fileset->partitionReferenceNum == 0xFFFF); + newfileset.partitionReferenceNum--) + { + lastblock = UDF_SB_PARTLEN(sb, newfileset.partitionReferenceNum); + newfileset.logicalBlockNum = 0; + + do + { + bh = udf_read_ptagged(sb, newfileset, 0, &ident); + if (!bh) + { + newfileset.logicalBlockNum ++; + continue; + } + + switch (ident) + { + case TAG_IDENT_SBD: + { + struct spaceBitmapDesc *sp; + sp = (struct spaceBitmapDesc *)bh->b_data; + newfileset.logicalBlockNum += 1 + + ((le32_to_cpu(sp->numOfBytes) + sizeof(struct spaceBitmapDesc) - 1) + >> sb->s_blocksize_bits); + udf_release_data(bh); + break; + } + case TAG_IDENT_FSD: + { + *fileset = newfileset; + break; + } + default: + { + newfileset.logicalBlockNum ++; + udf_release_data(bh); + bh = NULL; + break; + } + } + } + while (newfileset.logicalBlockNum < lastblock && + fileset->logicalBlockNum == 0xFFFFFFFF && + fileset->partitionReferenceNum == 0xFFFF); + } + } + + if ((fileset->logicalBlockNum != 0xFFFFFFFF || + fileset->partitionReferenceNum != 0xFFFF) && bh) + { + udf_debug("Fileset at block=%d, partition=%d\n", + fileset->logicalBlockNum, fileset->partitionReferenceNum); + + UDF_SB_PARTITION(sb) = fileset->partitionReferenceNum; + udf_load_fileset(sb, bh, root); + udf_release_data(bh); + return 0; + } + return 1; +} + +static void +udf_load_pvoldesc(struct super_block *sb, struct buffer_head *bh) +{ + struct primaryVolDesc *pvoldesc; + time_t recording; + long recording_usec; + struct ustr instr; + struct ustr outstr; + + pvoldesc = (struct primaryVolDesc *)bh->b_data; + + if ( udf_stamp_to_time(&recording, &recording_usec, + lets_to_cpu(pvoldesc->recordingDateAndTime)) ) + { + kernel_timestamp ts; + ts = lets_to_cpu(pvoldesc->recordingDateAndTime); + udf_debug("recording time %ld/%ld, %04u/%02u/%02u %02u:%02u (%x)\n", + recording, recording_usec, + ts.year, ts.month, ts.day, ts.hour, ts.minute, ts.typeAndTimezone); + UDF_SB_RECORDTIME(sb).tv_sec = recording; + UDF_SB_RECORDTIME(sb).tv_nsec = recording_usec * 1000; + } + + if ( !udf_build_ustr(&instr, pvoldesc->volIdent, 32) ) + { + if (udf_CS0toUTF8(&outstr, &instr)) + { + strncpy( UDF_SB_VOLIDENT(sb), outstr.u_name, + outstr.u_len > 31 ? 31 : outstr.u_len); + udf_debug("volIdent[] = '%s'\n", UDF_SB_VOLIDENT(sb)); + } + } + + if ( !udf_build_ustr(&instr, pvoldesc->volSetIdent, 128) ) + { + if (udf_CS0toUTF8(&outstr, &instr)) + udf_debug("volSetIdent[] = '%s'\n", outstr.u_name); + } +} + +static void +udf_load_fileset(struct super_block *sb, struct buffer_head *bh, kernel_lb_addr *root) +{ + struct fileSetDesc *fset; + + fset = (struct fileSetDesc *)bh->b_data; + + *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); + + UDF_SB_SERIALNUM(sb) = le16_to_cpu(fset->descTag.tagSerialNum); + + udf_debug("Rootdir at block=%d, partition=%d\n", + root->logicalBlockNum, root->partitionReferenceNum); +} + +static void +udf_load_partdesc(struct super_block *sb, struct buffer_head *bh) +{ + struct partitionDesc *p; + int i; + + p = (struct partitionDesc *)bh->b_data; + + for (i=0; i<UDF_SB_NUMPARTS(sb); i++) + { + udf_debug("Searching map: (%d == %d)\n", + UDF_SB_PARTMAPS(sb)[i].s_partition_num, le16_to_cpu(p->partitionNumber)); + if (UDF_SB_PARTMAPS(sb)[i].s_partition_num == le16_to_cpu(p->partitionNumber)) + { + UDF_SB_PARTLEN(sb,i) = le32_to_cpu(p->partitionLength); /* blocks */ + UDF_SB_PARTROOT(sb,i) = le32_to_cpu(p->partitionStartingLocation); + if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_READ_ONLY) + UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_READ_ONLY; + if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_WRITE_ONCE) + UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_WRITE_ONCE; + if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_REWRITABLE) + UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_REWRITABLE; + if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_OVERWRITABLE) + UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_OVERWRITABLE; + + if (!strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) || + !strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) + { + struct partitionHeaderDesc *phd; + + phd = (struct partitionHeaderDesc *)(p->partitionContentsUse); + if (phd->unallocSpaceTable.extLength) + { + kernel_lb_addr loc = { le32_to_cpu(phd->unallocSpaceTable.extPosition), i }; + + UDF_SB_PARTMAPS(sb)[i].s_uspace.s_table = + udf_iget(sb, loc); + UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_UNALLOC_TABLE; + udf_debug("unallocSpaceTable (part %d) @ %ld\n", + i, UDF_SB_PARTMAPS(sb)[i].s_uspace.s_table->i_ino); + } + if (phd->unallocSpaceBitmap.extLength) + { + UDF_SB_ALLOC_BITMAP(sb, i, s_uspace); + if (UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap != NULL) + { + UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extLength = + le32_to_cpu(phd->unallocSpaceBitmap.extLength); + UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extPosition = + le32_to_cpu(phd->unallocSpaceBitmap.extPosition); + UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_UNALLOC_BITMAP; + udf_debug("unallocSpaceBitmap (part %d) @ %d\n", + i, UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extPosition); + } + } + if (phd->partitionIntegrityTable.extLength) + udf_debug("partitionIntegrityTable (part %d)\n", i); + if (phd->freedSpaceTable.extLength) + { + kernel_lb_addr loc = { le32_to_cpu(phd->freedSpaceTable.extPosition), i }; + + UDF_SB_PARTMAPS(sb)[i].s_fspace.s_table = + udf_iget(sb, loc); + UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_FREED_TABLE; + udf_debug("freedSpaceTable (part %d) @ %ld\n", + i, UDF_SB_PARTMAPS(sb)[i].s_fspace.s_table->i_ino); + } + if (phd->freedSpaceBitmap.extLength) + { + UDF_SB_ALLOC_BITMAP(sb, i, s_fspace); + if (UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap != NULL) + { + UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extLength = + le32_to_cpu(phd->freedSpaceBitmap.extLength); + UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extPosition = + le32_to_cpu(phd->freedSpaceBitmap.extPosition); + UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_FREED_BITMAP; + udf_debug("freedSpaceBitmap (part %d) @ %d\n", + i, UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extPosition); + } + } + } + break; + } + } + if (i == UDF_SB_NUMPARTS(sb)) + { + udf_debug("Partition (%d) not found in partition map\n", le16_to_cpu(p->partitionNumber)); + } + else + { + udf_debug("Partition (%d:%d type %x) starts at physical %d, block length %d\n", + le16_to_cpu(p->partitionNumber), i, UDF_SB_PARTTYPE(sb,i), + UDF_SB_PARTROOT(sb,i), UDF_SB_PARTLEN(sb,i)); + } +} + +static int +udf_load_logicalvol(struct super_block *sb, struct buffer_head * bh, kernel_lb_addr *fileset) +{ + struct logicalVolDesc *lvd; + int i, j, offset; + uint8_t type; + + lvd = (struct logicalVolDesc *)bh->b_data; + + UDF_SB_ALLOC_PARTMAPS(sb, le32_to_cpu(lvd->numPartitionMaps)); + + for (i=0,offset=0; + i<UDF_SB_NUMPARTS(sb) && offset<le32_to_cpu(lvd->mapTableLength); + i++,offset+=((struct genericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapLength) + { + type = ((struct genericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapType; + if (type == 1) + { + struct genericPartitionMap1 *gpm1 = (struct genericPartitionMap1 *)&(lvd->partitionMaps[offset]); + UDF_SB_PARTTYPE(sb,i) = UDF_TYPE1_MAP15; + UDF_SB_PARTVSN(sb,i) = le16_to_cpu(gpm1->volSeqNum); + UDF_SB_PARTNUM(sb,i) = le16_to_cpu(gpm1->partitionNum); + UDF_SB_PARTFUNC(sb,i) = NULL; + } + else if (type == 2) + { + struct udfPartitionMap2 *upm2 = (struct udfPartitionMap2 *)&(lvd->partitionMaps[offset]); + if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, strlen(UDF_ID_VIRTUAL))) + { + if (le16_to_cpu(((__le16 *)upm2->partIdent.identSuffix)[0]) == 0x0150) + { + UDF_SB_PARTTYPE(sb,i) = UDF_VIRTUAL_MAP15; + UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_virt15; + } + else if (le16_to_cpu(((__le16 *)upm2->partIdent.identSuffix)[0]) == 0x0200) + { + UDF_SB_PARTTYPE(sb,i) = UDF_VIRTUAL_MAP20; + UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_virt20; + } + } + else if (!strncmp(upm2->partIdent.ident, UDF_ID_SPARABLE, strlen(UDF_ID_SPARABLE))) + { + uint32_t loc; + uint16_t ident; + struct sparingTable *st; + struct sparablePartitionMap *spm = (struct sparablePartitionMap *)&(lvd->partitionMaps[offset]); + + UDF_SB_PARTTYPE(sb,i) = UDF_SPARABLE_MAP15; + UDF_SB_TYPESPAR(sb,i).s_packet_len = le16_to_cpu(spm->packetLength); + for (j=0; j<spm->numSparingTables; j++) + { + loc = le32_to_cpu(spm->locSparingTable[j]); + UDF_SB_TYPESPAR(sb,i).s_spar_map[j] = + udf_read_tagged(sb, loc, loc, &ident); + if (UDF_SB_TYPESPAR(sb,i).s_spar_map[j] != NULL) + { + st = (struct sparingTable *)UDF_SB_TYPESPAR(sb,i).s_spar_map[j]->b_data; + if (ident != 0 || + strncmp(st->sparingIdent.ident, UDF_ID_SPARING, strlen(UDF_ID_SPARING))) + { + udf_release_data(UDF_SB_TYPESPAR(sb,i).s_spar_map[j]); + UDF_SB_TYPESPAR(sb,i).s_spar_map[j] = NULL; + } + } + } + UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_spar15; + } + else + { + udf_debug("Unknown ident: %s\n", upm2->partIdent.ident); + continue; + } + UDF_SB_PARTVSN(sb,i) = le16_to_cpu(upm2->volSeqNum); + UDF_SB_PARTNUM(sb,i) = le16_to_cpu(upm2->partitionNum); + } + udf_debug("Partition (%d:%d) type %d on volume %d\n", + i, UDF_SB_PARTNUM(sb,i), type, UDF_SB_PARTVSN(sb,i)); + } + + if (fileset) + { + long_ad *la = (long_ad *)&(lvd->logicalVolContentsUse[0]); + + *fileset = lelb_to_cpu(la->extLocation); + udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n", + fileset->logicalBlockNum, + fileset->partitionReferenceNum); + } + if (lvd->integritySeqExt.extLength) + udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); + return 0; +} + +/* + * udf_load_logicalvolint + * + */ +static void +udf_load_logicalvolint(struct super_block *sb, kernel_extent_ad loc) +{ + struct buffer_head *bh = NULL; + uint16_t ident; + + while (loc.extLength > 0 && + (bh = udf_read_tagged(sb, loc.extLocation, + loc.extLocation, &ident)) && + ident == TAG_IDENT_LVID) + { + UDF_SB_LVIDBH(sb) = bh; + + if (UDF_SB_LVID(sb)->nextIntegrityExt.extLength) + udf_load_logicalvolint(sb, leea_to_cpu(UDF_SB_LVID(sb)->nextIntegrityExt)); + + if (UDF_SB_LVIDBH(sb) != bh) + udf_release_data(bh); + loc.extLength -= sb->s_blocksize; + loc.extLocation ++; + } + if (UDF_SB_LVIDBH(sb) != bh) + udf_release_data(bh); +} + +/* + * udf_process_sequence + * + * PURPOSE + * Process a main/reserve volume descriptor sequence. + * + * PRE-CONDITIONS + * sb Pointer to _locked_ superblock. + * block First block of first extent of the sequence. + * lastblock Lastblock of first extent of the sequence. + * + * HISTORY + * July 1, 1997 - Andrew E. Mileski + * Written, tested, and released. + */ +static int +udf_process_sequence(struct super_block *sb, long block, long lastblock, kernel_lb_addr *fileset) +{ + struct buffer_head *bh = NULL; + struct udf_vds_record vds[VDS_POS_LENGTH]; + struct generic_desc *gd; + struct volDescPtr *vdp; + int done=0; + int i,j; + uint32_t vdsn; + uint16_t ident; + long next_s = 0, next_e = 0; + + memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); + + /* Read the main descriptor sequence */ + for (;(!done && block <= lastblock); block++) + { + + bh = udf_read_tagged(sb, block, block, &ident); + if (!bh) + break; + + /* Process each descriptor (ISO 13346 3/8.3-8.4) */ + gd = (struct generic_desc *)bh->b_data; + vdsn = le32_to_cpu(gd->volDescSeqNum); + switch (ident) + { + case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ + if (vdsn >= vds[VDS_POS_PRIMARY_VOL_DESC].volDescSeqNum) + { + vds[VDS_POS_PRIMARY_VOL_DESC].volDescSeqNum = vdsn; + vds[VDS_POS_PRIMARY_VOL_DESC].block = block; + } + break; + case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ + if (vdsn >= vds[VDS_POS_VOL_DESC_PTR].volDescSeqNum) + { + vds[VDS_POS_VOL_DESC_PTR].volDescSeqNum = vdsn; + vds[VDS_POS_VOL_DESC_PTR].block = block; + + vdp = (struct volDescPtr *)bh->b_data; + next_s = le32_to_cpu(vdp->nextVolDescSeqExt.extLocation); + next_e = le32_to_cpu(vdp->nextVolDescSeqExt.extLength); + next_e = next_e >> sb->s_blocksize_bits; + next_e += next_s; + } + break; + case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ + if (vdsn >= vds[VDS_POS_IMP_USE_VOL_DESC].volDescSeqNum) + { + vds[VDS_POS_IMP_USE_VOL_DESC].volDescSeqNum = vdsn; + vds[VDS_POS_IMP_USE_VOL_DESC].block = block; + } + break; + case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ + if (!vds[VDS_POS_PARTITION_DESC].block) + vds[VDS_POS_PARTITION_DESC].block = block; + break; + case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ + if (vdsn >= vds[VDS_POS_LOGICAL_VOL_DESC].volDescSeqNum) + { + vds[VDS_POS_LOGICAL_VOL_DESC].volDescSeqNum = vdsn; + vds[VDS_POS_LOGICAL_VOL_DESC].block = block; + } + break; + case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ + if (vdsn >= vds[VDS_POS_UNALLOC_SPACE_DESC].volDescSeqNum) + { + vds[VDS_POS_UNALLOC_SPACE_DESC].volDescSeqNum = vdsn; + vds[VDS_POS_UNALLOC_SPACE_DESC].block = block; + } + break; + case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ + vds[VDS_POS_TERMINATING_DESC].block = block; + if (next_e) + { + block = next_s; + lastblock = next_e; + next_s = next_e = 0; + } + else + done = 1; + break; + } + udf_release_data(bh); + } + for (i=0; i<VDS_POS_LENGTH; i++) + { + if (vds[i].block) + { + bh = udf_read_tagged(sb, vds[i].block, vds[i].block, &ident); + + if (i == VDS_POS_PRIMARY_VOL_DESC) + udf_load_pvoldesc(sb, bh); + else if (i == VDS_POS_LOGICAL_VOL_DESC) + udf_load_logicalvol(sb, bh, fileset); + else if (i == VDS_POS_PARTITION_DESC) + { + struct buffer_head *bh2 = NULL; + udf_load_partdesc(sb, bh); + for (j=vds[i].block+1; j<vds[VDS_POS_TERMINATING_DESC].block; j++) + { + bh2 = udf_read_tagged(sb, j, j, &ident); + gd = (struct generic_desc *)bh2->b_data; + if (ident == TAG_IDENT_PD) + udf_load_partdesc(sb, bh2); + udf_release_data(bh2); + } + } + udf_release_data(bh); + } + } + + return 0; +} + +/* + * udf_check_valid() + */ +static int +udf_check_valid(struct super_block *sb, int novrs, int silent) +{ + long block; + + if (novrs) + { + udf_debug("Validity check skipped because of novrs option\n"); + return 0; + } + /* Check that it is NSR02 compliant */ + /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ + else if ((block = udf_vrs(sb, silent)) == -1) + { + udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n"); + if (!UDF_SB_LASTBLOCK(sb)) + UDF_SB_LASTBLOCK(sb) = udf_get_last_block(sb); + return 0; + } + else + return !block; +} + +static int +udf_load_partition(struct super_block *sb, kernel_lb_addr *fileset) +{ + struct anchorVolDescPtr *anchor; + uint16_t ident; + struct buffer_head *bh; + long main_s, main_e, reserve_s, reserve_e; + int i, j; + + if (!sb) + return 1; + + for (i=0; i<sizeof(UDF_SB_ANCHOR(sb))/sizeof(int); i++) + { + if (UDF_SB_ANCHOR(sb)[i] && (bh = udf_read_tagged(sb, + UDF_SB_ANCHOR(sb)[i], UDF_SB_ANCHOR(sb)[i], &ident))) + { + anchor = (struct anchorVolDescPtr *)bh->b_data; + + /* Locate the main sequence */ + main_s = le32_to_cpu( anchor->mainVolDescSeqExt.extLocation ); + main_e = le32_to_cpu( anchor->mainVolDescSeqExt.extLength ); + main_e = main_e >> sb->s_blocksize_bits; + main_e += main_s; + + /* Locate the reserve sequence */ + reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); + reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); + reserve_e = reserve_e >> sb->s_blocksize_bits; + reserve_e += reserve_s; + + udf_release_data(bh); + + /* Process the main & reserve sequences */ + /* responsible for finding the PartitionDesc(s) */ + if (!(udf_process_sequence(sb, main_s, main_e, fileset) && + udf_process_sequence(sb, reserve_s, reserve_e, fileset))) + { + break; + } + } + } + + if (i == sizeof(UDF_SB_ANCHOR(sb))/sizeof(int)) + { + udf_debug("No Anchor block found\n"); + return 1; + } + else + udf_debug("Using anchor in block %d\n", UDF_SB_ANCHOR(sb)[i]); + + for (i=0; i<UDF_SB_NUMPARTS(sb); i++) + { + switch UDF_SB_PARTTYPE(sb, i) + { + case UDF_VIRTUAL_MAP15: + case UDF_VIRTUAL_MAP20: + { + kernel_lb_addr ino; + + if (!UDF_SB_LASTBLOCK(sb)) + { + UDF_SB_LASTBLOCK(sb) = udf_get_last_block(sb); + udf_find_anchor(sb); + } + + if (!UDF_SB_LASTBLOCK(sb)) + { + udf_debug("Unable to determine Lastblock (For Virtual Partition)\n"); + return 1; + } + + for (j=0; j<UDF_SB_NUMPARTS(sb); j++) + { + if (j != i && + UDF_SB_PARTVSN(sb,i) == UDF_SB_PARTVSN(sb,j) && + UDF_SB_PARTNUM(sb,i) == UDF_SB_PARTNUM(sb,j)) + { + ino.partitionReferenceNum = j; + ino.logicalBlockNum = UDF_SB_LASTBLOCK(sb) - + UDF_SB_PARTROOT(sb,j); + break; + } + } + + if (j == UDF_SB_NUMPARTS(sb)) + return 1; + + if (!(UDF_SB_VAT(sb) = udf_iget(sb, ino))) + return 1; + + if (UDF_SB_PARTTYPE(sb,i) == UDF_VIRTUAL_MAP15) + { + UDF_SB_TYPEVIRT(sb,i).s_start_offset = udf_ext0_offset(UDF_SB_VAT(sb)); + UDF_SB_TYPEVIRT(sb,i).s_num_entries = (UDF_SB_VAT(sb)->i_size - 36) >> 2; + } + else if (UDF_SB_PARTTYPE(sb,i) == UDF_VIRTUAL_MAP20) + { + struct buffer_head *bh = NULL; + uint32_t pos; + + pos = udf_block_map(UDF_SB_VAT(sb), 0); + bh = sb_bread(sb, pos); + UDF_SB_TYPEVIRT(sb,i).s_start_offset = + le16_to_cpu(((struct virtualAllocationTable20 *)bh->b_data + udf_ext0_offset(UDF_SB_VAT(sb)))->lengthHeader) + + udf_ext0_offset(UDF_SB_VAT(sb)); + UDF_SB_TYPEVIRT(sb,i).s_num_entries = (UDF_SB_VAT(sb)->i_size - + UDF_SB_TYPEVIRT(sb,i).s_start_offset) >> 2; + udf_release_data(bh); + } + UDF_SB_PARTROOT(sb,i) = udf_get_pblock(sb, 0, i, 0); + UDF_SB_PARTLEN(sb,i) = UDF_SB_PARTLEN(sb,ino.partitionReferenceNum); + } + } + } + return 0; +} + +static void udf_open_lvid(struct super_block *sb) +{ + if (UDF_SB_LVIDBH(sb)) + { + int i; + kernel_timestamp cpu_time; + + UDF_SB_LVIDIU(sb)->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; + UDF_SB_LVIDIU(sb)->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; + if (udf_time_to_stamp(&cpu_time, CURRENT_TIME)) + UDF_SB_LVID(sb)->recordingDateAndTime = cpu_to_lets(cpu_time); + UDF_SB_LVID(sb)->integrityType = LVID_INTEGRITY_TYPE_OPEN; + + UDF_SB_LVID(sb)->descTag.descCRC = + cpu_to_le16(udf_crc((char *)UDF_SB_LVID(sb) + sizeof(tag), + le16_to_cpu(UDF_SB_LVID(sb)->descTag.descCRCLength), 0)); + + UDF_SB_LVID(sb)->descTag.tagChecksum = 0; + for (i=0; i<16; i++) + if (i != 4) + UDF_SB_LVID(sb)->descTag.tagChecksum += + ((uint8_t *)&(UDF_SB_LVID(sb)->descTag))[i]; + + mark_buffer_dirty(UDF_SB_LVIDBH(sb)); + } +} + +static void udf_close_lvid(struct super_block *sb) +{ + if (UDF_SB_LVIDBH(sb) && + UDF_SB_LVID(sb)->integrityType == LVID_INTEGRITY_TYPE_OPEN) + { + int i; + kernel_timestamp cpu_time; + + UDF_SB_LVIDIU(sb)->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; + UDF_SB_LVIDIU(sb)->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; + if (udf_time_to_stamp(&cpu_time, CURRENT_TIME)) + UDF_SB_LVID(sb)->recordingDateAndTime = cpu_to_lets(cpu_time); + if (UDF_MAX_WRITE_VERSION > le16_to_cpu(UDF_SB_LVIDIU(sb)->maxUDFWriteRev)) + UDF_SB_LVIDIU(sb)->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); + if (UDF_SB_UDFREV(sb) > le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev)) + UDF_SB_LVIDIU(sb)->minUDFReadRev = cpu_to_le16(UDF_SB_UDFREV(sb)); + if (UDF_SB_UDFREV(sb) > le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev)) + UDF_SB_LVIDIU(sb)->minUDFWriteRev = cpu_to_le16(UDF_SB_UDFREV(sb)); + UDF_SB_LVID(sb)->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); + + UDF_SB_LVID(sb)->descTag.descCRC = + cpu_to_le16(udf_crc((char *)UDF_SB_LVID(sb) + sizeof(tag), + le16_to_cpu(UDF_SB_LVID(sb)->descTag.descCRCLength), 0)); + + UDF_SB_LVID(sb)->descTag.tagChecksum = 0; + for (i=0; i<16; i++) + if (i != 4) + UDF_SB_LVID(sb)->descTag.tagChecksum += + ((uint8_t *)&(UDF_SB_LVID(sb)->descTag))[i]; + + mark_buffer_dirty(UDF_SB_LVIDBH(sb)); + } +} + +/* + * udf_read_super + * + * PURPOSE + * Complete the specified super block. + * + * PRE-CONDITIONS + * sb Pointer to superblock to complete - never NULL. + * sb->s_dev Device to read suberblock from. + * options Pointer to mount options. + * silent Silent flag. + * + * HISTORY + * July 1, 1997 - Andrew E. Mileski + * Written, tested, and released. + */ +static int udf_fill_super(struct super_block *sb, void *options, int silent) +{ + int i; + struct inode *inode=NULL; + struct udf_options uopt; + kernel_lb_addr rootdir, fileset; + struct udf_sb_info *sbi; + + uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); + uopt.uid = -1; + uopt.gid = -1; + uopt.umask = 0; + + sbi = kmalloc(sizeof(struct udf_sb_info), GFP_KERNEL); + if (!sbi) + return -ENOMEM; + sb->s_fs_info = sbi; + memset(UDF_SB(sb), 0x00, sizeof(struct udf_sb_info)); + + init_MUTEX(&sbi->s_alloc_sem); + + if (!udf_parse_options((char *)options, &uopt)) + goto error_out; + + if (uopt.flags & (1 << UDF_FLAG_UTF8) && + uopt.flags & (1 << UDF_FLAG_NLS_MAP)) + { + udf_error(sb, "udf_read_super", + "utf8 cannot be combined with iocharset\n"); + goto error_out; + } +#ifdef CONFIG_UDF_NLS + if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) + { + uopt.nls_map = load_nls_default(); + if (!uopt.nls_map) + uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); + else + udf_debug("Using default NLS map\n"); + } +#endif + if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) + uopt.flags |= (1 << UDF_FLAG_UTF8); + + fileset.logicalBlockNum = 0xFFFFFFFF; + fileset.partitionReferenceNum = 0xFFFF; + + UDF_SB(sb)->s_flags = uopt.flags; + UDF_SB(sb)->s_uid = uopt.uid; + UDF_SB(sb)->s_gid = uopt.gid; + UDF_SB(sb)->s_umask = uopt.umask; + UDF_SB(sb)->s_nls_map = uopt.nls_map; + + /* Set the block size for all transfers */ + if (!udf_set_blocksize(sb, uopt.blocksize)) + goto error_out; + + if ( uopt.session == 0xFFFFFFFF ) + UDF_SB_SESSION(sb) = udf_get_last_session(sb); + else + UDF_SB_SESSION(sb) = uopt.session; + + udf_debug("Multi-session=%d\n", UDF_SB_SESSION(sb)); + + UDF_SB_LASTBLOCK(sb) = uopt.lastblock; + UDF_SB_ANCHOR(sb)[0] = UDF_SB_ANCHOR(sb)[1] = 0; + UDF_SB_ANCHOR(sb)[2] = uopt.anchor; + UDF_SB_ANCHOR(sb)[3] = 256; + + if (udf_check_valid(sb, uopt.novrs, silent)) /* read volume recognition sequences */ + { + printk("UDF-fs: No VRS found\n"); + goto error_out; + } + + udf_find_anchor(sb); + + /* Fill in the rest of the superblock */ + sb->s_op = &udf_sb_ops; + sb->dq_op = NULL; + sb->s_dirt = 0; + sb->s_magic = UDF_SUPER_MAGIC; + sb->s_time_gran = 1000; + + if (udf_load_partition(sb, &fileset)) + { + printk("UDF-fs: No partition found (1)\n"); + goto error_out; + } + + udf_debug("Lastblock=%d\n", UDF_SB_LASTBLOCK(sb)); + + if ( UDF_SB_LVIDBH(sb) ) + { + uint16_t minUDFReadRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev); + uint16_t minUDFWriteRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev); + /* uint16_t maxUDFWriteRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->maxUDFWriteRev); */ + + if (minUDFReadRev > UDF_MAX_READ_VERSION) + { + printk("UDF-fs: minUDFReadRev=%x (max is %x)\n", + le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev), + UDF_MAX_READ_VERSION); + goto error_out; + } + else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) + { + sb->s_flags |= MS_RDONLY; + } + + UDF_SB_UDFREV(sb) = minUDFWriteRev; + + if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) + UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); + if (minUDFReadRev >= UDF_VERS_USE_STREAMS) + UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); + } + + if ( !UDF_SB_NUMPARTS(sb) ) + { + printk("UDF-fs: No partition found (2)\n"); + goto error_out; + } + + if ( udf_find_fileset(sb, &fileset, &rootdir) ) + { + printk("UDF-fs: No fileset found\n"); + goto error_out; + } + + if (!silent) + { + kernel_timestamp ts; + udf_time_to_stamp(&ts, UDF_SB_RECORDTIME(sb)); + udf_info("UDF %s (%s) Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", + UDFFS_VERSION, UDFFS_DATE, + UDF_SB_VOLIDENT(sb), ts.year, ts.month, ts.day, ts.hour, ts.minute, + ts.typeAndTimezone); + } + if (!(sb->s_flags & MS_RDONLY)) + udf_open_lvid(sb); + + /* Assign the root inode */ + /* assign inodes by physical block number */ + /* perhaps it's not extensible enough, but for now ... */ + inode = udf_iget(sb, rootdir); + if (!inode) + { + printk("UDF-fs: Error in udf_iget, block=%d, partition=%d\n", + rootdir.logicalBlockNum, rootdir.partitionReferenceNum); + goto error_out; + } + + /* Allocate a dentry for the root inode */ + sb->s_root = d_alloc_root(inode); + if (!sb->s_root) + { + printk("UDF-fs: Couldn't allocate root dentry\n"); + iput(inode); + goto error_out; + } + sb->s_maxbytes = MAX_LFS_FILESIZE; + return 0; + +error_out: + if (UDF_SB_VAT(sb)) + iput(UDF_SB_VAT(sb)); + if (UDF_SB_NUMPARTS(sb)) + { + if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE) + iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table); + if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE) + iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table); + if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP) + UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb),s_uspace); + if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP) + UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb),s_fspace); + if (UDF_SB_PARTTYPE(sb, UDF_SB_PARTITION(sb)) == UDF_SPARABLE_MAP15) + { + for (i=0; i<4; i++) + udf_release_data(UDF_SB_TYPESPAR(sb, UDF_SB_PARTITION(sb)).s_spar_map[i]); + } + } +#ifdef CONFIG_UDF_NLS + if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) + unload_nls(UDF_SB(sb)->s_nls_map); +#endif + if (!(sb->s_flags & MS_RDONLY)) + udf_close_lvid(sb); + udf_release_data(UDF_SB_LVIDBH(sb)); + UDF_SB_FREE(sb); + kfree(sbi); + sb->s_fs_info = NULL; + return -EINVAL; +} + +void udf_error(struct super_block *sb, const char *function, + const char *fmt, ...) +{ + va_list args; + + if (!(sb->s_flags & MS_RDONLY)) + { + /* mark sb error */ + sb->s_dirt = 1; + } + va_start(args, fmt); + vsprintf(error_buf, fmt, args); + va_end(args); + printk (KERN_CRIT "UDF-fs error (device %s): %s: %s\n", + sb->s_id, function, error_buf); +} + +void udf_warning(struct super_block *sb, const char *function, + const char *fmt, ...) +{ + va_list args; + + va_start (args, fmt); + vsprintf(error_buf, fmt, args); + va_end(args); + printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n", + sb->s_id, function, error_buf); +} + +/* + * udf_put_super + * + * PURPOSE + * Prepare for destruction of the superblock. + * + * DESCRIPTION + * Called before the filesystem is unmounted. + * + * HISTORY + * July 1, 1997 - Andrew E. Mileski + * Written, tested, and released. + */ +static void +udf_put_super(struct super_block *sb) +{ + int i; + + if (UDF_SB_VAT(sb)) + iput(UDF_SB_VAT(sb)); + if (UDF_SB_NUMPARTS(sb)) + { + if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE) + iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table); + if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE) + iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table); + if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP) + UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb),s_uspace); + if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP) + UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb),s_fspace); + if (UDF_SB_PARTTYPE(sb, UDF_SB_PARTITION(sb)) == UDF_SPARABLE_MAP15) + { + for (i=0; i<4; i++) + udf_release_data(UDF_SB_TYPESPAR(sb, UDF_SB_PARTITION(sb)).s_spar_map[i]); + } + } +#ifdef CONFIG_UDF_NLS + if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) + unload_nls(UDF_SB(sb)->s_nls_map); +#endif + if (!(sb->s_flags & MS_RDONLY)) + udf_close_lvid(sb); + udf_release_data(UDF_SB_LVIDBH(sb)); + UDF_SB_FREE(sb); + kfree(sb->s_fs_info); + sb->s_fs_info = NULL; +} + +/* + * udf_stat_fs + * + * PURPOSE + * Return info about the filesystem. + * + * DESCRIPTION + * Called by sys_statfs() + * + * HISTORY + * July 1, 1997 - Andrew E. Mileski + * Written, tested, and released. + */ +static int +udf_statfs(struct super_block *sb, struct kstatfs *buf) +{ + buf->f_type = UDF_SUPER_MAGIC; + buf->f_bsize = sb->s_blocksize; + buf->f_blocks = UDF_SB_PARTLEN(sb, UDF_SB_PARTITION(sb)); + buf->f_bfree = udf_count_free(sb); + buf->f_bavail = buf->f_bfree; + buf->f_files = (UDF_SB_LVIDBH(sb) ? + (le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) + + le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs)) : 0) + buf->f_bfree; + buf->f_ffree = buf->f_bfree; + /* __kernel_fsid_t f_fsid */ + buf->f_namelen = UDF_NAME_LEN-2; + + return 0; +} + +static unsigned char udf_bitmap_lookup[16] = { + 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4 +}; + +static unsigned int +udf_count_free_bitmap(struct super_block *sb, struct udf_bitmap *bitmap) +{ + struct buffer_head *bh = NULL; + unsigned int accum = 0; + int index; + int block = 0, newblock; + kernel_lb_addr loc; + uint32_t bytes; + uint8_t value; + uint8_t *ptr; + uint16_t ident; + struct spaceBitmapDesc *bm; + + lock_kernel(); + + loc.logicalBlockNum = bitmap->s_extPosition; + loc.partitionReferenceNum = UDF_SB_PARTITION(sb); + bh = udf_read_ptagged(sb, loc, 0, &ident); + + if (!bh) + { + printk(KERN_ERR "udf: udf_count_free failed\n"); + goto out; + } + else if (ident != TAG_IDENT_SBD) + { + udf_release_data(bh); + printk(KERN_ERR "udf: udf_count_free failed\n"); + goto out; + } + + bm = (struct spaceBitmapDesc *)bh->b_data; + bytes = le32_to_cpu(bm->numOfBytes); + index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ + ptr = (uint8_t *)bh->b_data; + + while ( bytes > 0 ) + { + while ((bytes > 0) && (index < sb->s_blocksize)) + { + value = ptr[index]; + accum += udf_bitmap_lookup[ value & 0x0f ]; + accum += udf_bitmap_lookup[ value >> 4 ]; + index++; + bytes--; + } + if ( bytes ) + { + udf_release_data(bh); + newblock = udf_get_lb_pblock(sb, loc, ++block); + bh = udf_tread(sb, newblock); + if (!bh) + { + udf_debug("read failed\n"); + goto out; + } + index = 0; + ptr = (uint8_t *)bh->b_data; + } + } + udf_release_data(bh); + +out: + unlock_kernel(); + + return accum; +} + +static unsigned int +udf_count_free_table(struct super_block *sb, struct inode * table) +{ + unsigned int accum = 0; + uint32_t extoffset, elen; + kernel_lb_addr bloc, eloc; + int8_t etype; + struct buffer_head *bh = NULL; + + lock_kernel(); + + bloc = UDF_I_LOCATION(table); + extoffset = sizeof(struct unallocSpaceEntry); + + while ((etype = udf_next_aext(table, &bloc, &extoffset, &eloc, &elen, &bh, 1)) != -1) + { + accum += (elen >> table->i_sb->s_blocksize_bits); + } + udf_release_data(bh); + + unlock_kernel(); + + return accum; +} + +static unsigned int +udf_count_free(struct super_block *sb) +{ + unsigned int accum = 0; + + if (UDF_SB_LVIDBH(sb)) + { + if (le32_to_cpu(UDF_SB_LVID(sb)->numOfPartitions) > UDF_SB_PARTITION(sb)) + { + accum = le32_to_cpu(UDF_SB_LVID(sb)->freeSpaceTable[UDF_SB_PARTITION(sb)]); + + if (accum == 0xFFFFFFFF) + accum = 0; + } + } + + if (accum) + return accum; + + if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP) + { + accum += udf_count_free_bitmap(sb, + UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_bitmap); + } + if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP) + { + accum += udf_count_free_bitmap(sb, + UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_bitmap); + } + if (accum) + return accum; + + if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE) + { + accum += udf_count_free_table(sb, + UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table); + } + if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE) + { + accum += udf_count_free_table(sb, + UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table); + } + + return accum; +} |