diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/udf/super.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/udf/super.c | 2320 |
1 files changed, 0 insertions, 2320 deletions
diff --git a/ANDROID_3.4.5/fs/udf/super.c b/ANDROID_3.4.5/fs/udf/super.c deleted file mode 100644 index 8d86a870..00000000 --- a/ANDROID_3.4.5/fs/udf/super.c +++ /dev/null @@ -1,2320 +0,0 @@ -/* - * 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/ - * - * 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/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/buffer_head.h> -#include <linux/vfs.h> -#include <linux/vmalloc.h> -#include <linux/errno.h> -#include <linux/mount.h> -#include <linux/seq_file.h> -#include <linux/bitmap.h> -#include <linux/crc-itu-t.h> -#include <linux/log2.h> -#include <asm/byteorder.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 - -#define UDF_DEFAULT_BLOCKSIZE 2048 - -enum { UDF_MAX_LINKS = 0xffff }; - -/* 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 int udf_sync_fs(struct super_block *, int); -static int udf_remount_fs(struct super_block *, int *, char *); -static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad); -static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *, - struct kernel_lb_addr *); -static void udf_load_fileset(struct super_block *, struct buffer_head *, - struct kernel_lb_addr *); -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 dentry *, struct kstatfs *); -static int udf_show_options(struct seq_file *, struct dentry *); - -struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi) -{ - struct logicalVolIntegrityDesc *lvid = - (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data; - __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions); - __u32 offset = number_of_partitions * 2 * - sizeof(uint32_t)/sizeof(uint8_t); - return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); -} - -/* UDF filesystem type */ -static struct dentry *udf_mount(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data) -{ - return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super); -} - -static struct file_system_type udf_fstype = { - .owner = THIS_MODULE, - .name = "udf", - .mount = udf_mount, - .kill_sb = kill_block_super, - .fs_flags = FS_REQUIRES_DEV, -}; - -static struct kmem_cache *udf_inode_cachep; - -static struct inode *udf_alloc_inode(struct super_block *sb) -{ - struct udf_inode_info *ei; - ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); - if (!ei) - return NULL; - - ei->i_unique = 0; - ei->i_lenExtents = 0; - ei->i_next_alloc_block = 0; - ei->i_next_alloc_goal = 0; - ei->i_strat4096 = 0; - init_rwsem(&ei->i_data_sem); - - return &ei->vfs_inode; -} - -static void udf_i_callback(struct rcu_head *head) -{ - struct inode *inode = container_of(head, struct inode, i_rcu); - kmem_cache_free(udf_inode_cachep, UDF_I(inode)); -} - -static void udf_destroy_inode(struct inode *inode) -{ - call_rcu(&inode->i_rcu, udf_i_callback); -} - -static void init_once(void *foo) -{ - struct udf_inode_info *ei = (struct udf_inode_info *)foo; - - 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 | - SLAB_MEM_SPREAD), - init_once); - if (!udf_inode_cachep) - return -ENOMEM; - return 0; -} - -static void destroy_inodecache(void) -{ - kmem_cache_destroy(udf_inode_cachep); -} - -/* Superblock operations */ -static const struct super_operations udf_sb_ops = { - .alloc_inode = udf_alloc_inode, - .destroy_inode = udf_destroy_inode, - .write_inode = udf_write_inode, - .evict_inode = udf_evict_inode, - .put_super = udf_put_super, - .sync_fs = udf_sync_fs, - .statfs = udf_statfs, - .remount_fs = udf_remount_fs, - .show_options = udf_show_options, -}; - -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; - umode_t umask; - gid_t gid; - uid_t uid; - umode_t fmode; - umode_t dmode; - 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) - -static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) -{ - struct udf_sb_info *sbi = UDF_SB(sb); - - sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), - GFP_KERNEL); - if (!sbi->s_partmaps) { - udf_err(sb, "Unable to allocate space for %d partition maps\n", - count); - sbi->s_partitions = 0; - return -ENOMEM; - } - - sbi->s_partitions = count; - return 0; -} - -static int udf_show_options(struct seq_file *seq, struct dentry *root) -{ - struct super_block *sb = root->d_sb; - struct udf_sb_info *sbi = UDF_SB(sb); - - if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) - seq_puts(seq, ",nostrict"); - if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) - seq_printf(seq, ",bs=%lu", sb->s_blocksize); - if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) - seq_puts(seq, ",unhide"); - if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) - seq_puts(seq, ",undelete"); - if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) - seq_puts(seq, ",noadinicb"); - if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) - seq_puts(seq, ",shortad"); - if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) - seq_puts(seq, ",uid=forget"); - if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) - seq_puts(seq, ",uid=ignore"); - if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) - seq_puts(seq, ",gid=forget"); - if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) - seq_puts(seq, ",gid=ignore"); - if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) - seq_printf(seq, ",uid=%u", sbi->s_uid); - if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) - seq_printf(seq, ",gid=%u", sbi->s_gid); - if (sbi->s_umask != 0) - seq_printf(seq, ",umask=%ho", sbi->s_umask); - if (sbi->s_fmode != UDF_INVALID_MODE) - seq_printf(seq, ",mode=%ho", sbi->s_fmode); - if (sbi->s_dmode != UDF_INVALID_MODE) - seq_printf(seq, ",dmode=%ho", sbi->s_dmode); - if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) - seq_printf(seq, ",session=%u", sbi->s_session); - if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) - seq_printf(seq, ",lastblock=%u", sbi->s_last_block); - if (sbi->s_anchor != 0) - seq_printf(seq, ",anchor=%u", sbi->s_anchor); - /* - * volume, partition, fileset and rootdir seem to be ignored - * currently - */ - if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) - seq_puts(seq, ",utf8"); - if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) - seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); - - return 0; -} - -/* - * udf_parse_options - * - * PURPOSE - * Parse mount options. - * - * DESCRIPTION - * The following mount options are supported: - * - * gid= Set the default group. - * umask= Set the default umask. - * mode= Set the default file permissions. - * dmode= Set the default directory permissions. - * 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, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, - Opt_fmode, Opt_dmode -}; - -static const 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_uforget, "uid=forget"}, - {Opt_uignore, "uid=ignore"}, - {Opt_gforget, "gid=forget"}, - {Opt_gignore, "gid=ignore"}, - {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_fmode, "mode=%o"}, - {Opt_dmode, "dmode=%o"}, - {Opt_err, NULL} -}; - -static int udf_parse_options(char *options, struct udf_options *uopt, - bool remount) -{ - char *p; - int option; - - uopt->novrs = 0; - 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; - break; - case Opt_bs: - if (match_int(&args[0], &option)) - return 0; - uopt->blocksize = option; - uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); - 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; - uopt->flags |= (1 << UDF_FLAG_GID_SET); - break; - case Opt_uid: - if (match_int(args, &option)) - return 0; - uopt->uid = option; - uopt->flags |= (1 << UDF_FLAG_UID_SET); - 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; - if (!remount) - uopt->flags |= (1 << UDF_FLAG_SESSION_SET); - break; - case Opt_lastblock: - if (match_int(args, &option)) - return 0; - uopt->lastblock = option; - if (!remount) - uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); - 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 - case Opt_uignore: - uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); - break; - case Opt_uforget: - uopt->flags |= (1 << UDF_FLAG_UID_FORGET); - break; - case Opt_gignore: - uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); - break; - case Opt_gforget: - uopt->flags |= (1 << UDF_FLAG_GID_FORGET); - break; - case Opt_fmode: - if (match_octal(args, &option)) - return 0; - uopt->fmode = option & 0777; - break; - case Opt_dmode: - if (match_octal(args, &option)) - return 0; - uopt->dmode = option & 0777; - break; - default: - pr_err("bad mount option \"%s\" or missing value\n", p); - return 0; - } - } - return 1; -} - -static int udf_remount_fs(struct super_block *sb, int *flags, char *options) -{ - struct udf_options uopt; - struct udf_sb_info *sbi = UDF_SB(sb); - int error = 0; - - uopt.flags = sbi->s_flags; - uopt.uid = sbi->s_uid; - uopt.gid = sbi->s_gid; - uopt.umask = sbi->s_umask; - uopt.fmode = sbi->s_fmode; - uopt.dmode = sbi->s_dmode; - - if (!udf_parse_options(options, &uopt, true)) - return -EINVAL; - - write_lock(&sbi->s_cred_lock); - sbi->s_flags = uopt.flags; - sbi->s_uid = uopt.uid; - sbi->s_gid = uopt.gid; - sbi->s_umask = uopt.umask; - sbi->s_fmode = uopt.fmode; - sbi->s_dmode = uopt.dmode; - write_unlock(&sbi->s_cred_lock); - - if (sbi->s_lvid_bh) { - int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); - if (write_rev > UDF_MAX_WRITE_VERSION) - *flags |= MS_RDONLY; - } - - if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) - goto out_unlock; - - if (*flags & MS_RDONLY) - udf_close_lvid(sb); - else - udf_open_lvid(sb); - -out_unlock: - return error; -} - -/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */ -/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ -static loff_t udf_check_vsd(struct super_block *sb) -{ - struct volStructDesc *vsd = NULL; - loff_t sector = 32768; - int sectorsize; - struct buffer_head *bh = NULL; - int nsr02 = 0; - int nsr03 = 0; - struct udf_sb_info *sbi; - - sbi = UDF_SB(sb); - if (sb->s_blocksize < sizeof(struct volStructDesc)) - sectorsize = sizeof(struct volStructDesc); - else - sectorsize = sb->s_blocksize; - - sector += (sbi->s_session << sb->s_blocksize_bits); - - udf_debug("Starting at sector %u (%ld byte sectors)\n", - (unsigned int)(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) { - brelse(bh); - break; - } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, - VSD_STD_ID_LEN)) { - 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)) - ; /* nothing */ - else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, - VSD_STD_ID_LEN)) { - brelse(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; - brelse(bh); - } - - if (nsr03) - return nsr03; - else if (nsr02) - return nsr02; - else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768) - return -1; - else - return 0; -} - -static int udf_find_fileset(struct super_block *sb, - struct kernel_lb_addr *fileset, - struct kernel_lb_addr *root) -{ - struct buffer_head *bh = NULL; - long lastblock; - uint16_t ident; - struct udf_sb_info *sbi; - - 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) { - brelse(bh); - return 1; - } - - } - - sbi = UDF_SB(sb); - if (!bh) { - /* Search backwards through the partitions */ - struct kernel_lb_addr newfileset; - -/* --> cvg: FIXME - is it reasonable? */ - return 1; - - for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; - (newfileset.partitionReferenceNum != 0xFFFF && - fileset->logicalBlockNum == 0xFFFFFFFF && - fileset->partitionReferenceNum == 0xFFFF); - newfileset.partitionReferenceNum--) { - lastblock = sbi->s_partmaps - [newfileset.partitionReferenceNum] - .s_partition_len; - 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); - brelse(bh); - break; - } - case TAG_IDENT_FSD: - *fileset = newfileset; - break; - default: - newfileset.logicalBlockNum++; - brelse(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); - - sbi->s_partition = fileset->partitionReferenceNum; - udf_load_fileset(sb, bh, root); - brelse(bh); - return 0; - } - return 1; -} - -static int udf_load_pvoldesc(struct super_block *sb, sector_t block) -{ - struct primaryVolDesc *pvoldesc; - struct ustr *instr, *outstr; - struct buffer_head *bh; - uint16_t ident; - int ret = 1; - - instr = kmalloc(sizeof(struct ustr), GFP_NOFS); - if (!instr) - return 1; - - outstr = kmalloc(sizeof(struct ustr), GFP_NOFS); - if (!outstr) - goto out1; - - bh = udf_read_tagged(sb, block, block, &ident); - if (!bh) - goto out2; - - BUG_ON(ident != TAG_IDENT_PVD); - - pvoldesc = (struct primaryVolDesc *)bh->b_data; - - if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, - pvoldesc->recordingDateAndTime)) { -#ifdef UDFFS_DEBUG - struct timestamp *ts = &pvoldesc->recordingDateAndTime; - udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n", - le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, - ts->minute, le16_to_cpu(ts->typeAndTimezone)); -#endif - } - - if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) - if (udf_CS0toUTF8(outstr, instr)) { - strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name, - outstr->u_len > 31 ? 31 : outstr->u_len); - udf_debug("volIdent[] = '%s'\n", - UDF_SB(sb)->s_volume_ident); - } - - if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) - if (udf_CS0toUTF8(outstr, instr)) - udf_debug("volSetIdent[] = '%s'\n", outstr->u_name); - - brelse(bh); - ret = 0; -out2: - kfree(outstr); -out1: - kfree(instr); - return ret; -} - -struct inode *udf_find_metadata_inode_efe(struct super_block *sb, - u32 meta_file_loc, u32 partition_num) -{ - struct kernel_lb_addr addr; - struct inode *metadata_fe; - - addr.logicalBlockNum = meta_file_loc; - addr.partitionReferenceNum = partition_num; - - metadata_fe = udf_iget(sb, &addr); - - if (metadata_fe == NULL) - udf_warn(sb, "metadata inode efe not found\n"); - else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) { - udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n"); - iput(metadata_fe); - metadata_fe = NULL; - } - - return metadata_fe; -} - -static int udf_load_metadata_files(struct super_block *sb, int partition) -{ - struct udf_sb_info *sbi = UDF_SB(sb); - struct udf_part_map *map; - struct udf_meta_data *mdata; - struct kernel_lb_addr addr; - - map = &sbi->s_partmaps[partition]; - mdata = &map->s_type_specific.s_metadata; - - /* metadata address */ - udf_debug("Metadata file location: block = %d part = %d\n", - mdata->s_meta_file_loc, map->s_partition_num); - - mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb, - mdata->s_meta_file_loc, map->s_partition_num); - - if (mdata->s_metadata_fe == NULL) { - /* mirror file entry */ - udf_debug("Mirror metadata file location: block = %d part = %d\n", - mdata->s_mirror_file_loc, map->s_partition_num); - - mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb, - mdata->s_mirror_file_loc, map->s_partition_num); - - if (mdata->s_mirror_fe == NULL) { - udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n"); - goto error_exit; - } - } - - /* - * bitmap file entry - * Note: - * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) - */ - if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { - addr.logicalBlockNum = mdata->s_bitmap_file_loc; - addr.partitionReferenceNum = map->s_partition_num; - - udf_debug("Bitmap file location: block = %d part = %d\n", - addr.logicalBlockNum, addr.partitionReferenceNum); - - mdata->s_bitmap_fe = udf_iget(sb, &addr); - - if (mdata->s_bitmap_fe == NULL) { - if (sb->s_flags & MS_RDONLY) - udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n"); - else { - udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n"); - goto error_exit; - } - } - } - - udf_debug("udf_load_metadata_files Ok\n"); - - return 0; - -error_exit: - return 1; -} - -static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, - struct kernel_lb_addr *root) -{ - struct fileSetDesc *fset; - - fset = (struct fileSetDesc *)bh->b_data; - - *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); - - UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); - - udf_debug("Rootdir at block=%d, partition=%d\n", - root->logicalBlockNum, root->partitionReferenceNum); -} - -int udf_compute_nr_groups(struct super_block *sb, u32 partition) -{ - struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; - return DIV_ROUND_UP(map->s_partition_len + - (sizeof(struct spaceBitmapDesc) << 3), - sb->s_blocksize * 8); -} - -static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) -{ - struct udf_bitmap *bitmap; - int nr_groups; - int size; - - nr_groups = udf_compute_nr_groups(sb, index); - size = sizeof(struct udf_bitmap) + - (sizeof(struct buffer_head *) * nr_groups); - - if (size <= PAGE_SIZE) - bitmap = kzalloc(size, GFP_KERNEL); - else - bitmap = vzalloc(size); /* TODO: get rid of vzalloc */ - - if (bitmap == NULL) - return NULL; - - bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1); - bitmap->s_nr_groups = nr_groups; - return bitmap; -} - -static int udf_fill_partdesc_info(struct super_block *sb, - struct partitionDesc *p, int p_index) -{ - struct udf_part_map *map; - struct udf_sb_info *sbi = UDF_SB(sb); - struct partitionHeaderDesc *phd; - - map = &sbi->s_partmaps[p_index]; - - map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ - map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); - - if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) - map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; - if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) - map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; - if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) - map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; - if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) - map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; - - udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n", - p_index, map->s_partition_type, - map->s_partition_root, map->s_partition_len); - - if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && - strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) - return 0; - - phd = (struct partitionHeaderDesc *)p->partitionContentsUse; - if (phd->unallocSpaceTable.extLength) { - struct kernel_lb_addr loc = { - .logicalBlockNum = le32_to_cpu( - phd->unallocSpaceTable.extPosition), - .partitionReferenceNum = p_index, - }; - - map->s_uspace.s_table = udf_iget(sb, &loc); - if (!map->s_uspace.s_table) { - udf_debug("cannot load unallocSpaceTable (part %d)\n", - p_index); - return 1; - } - map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; - udf_debug("unallocSpaceTable (part %d) @ %ld\n", - p_index, map->s_uspace.s_table->i_ino); - } - - if (phd->unallocSpaceBitmap.extLength) { - struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); - if (!bitmap) - return 1; - map->s_uspace.s_bitmap = bitmap; - bitmap->s_extLength = le32_to_cpu( - phd->unallocSpaceBitmap.extLength); - bitmap->s_extPosition = le32_to_cpu( - phd->unallocSpaceBitmap.extPosition); - map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; - udf_debug("unallocSpaceBitmap (part %d) @ %d\n", - p_index, bitmap->s_extPosition); - } - - if (phd->partitionIntegrityTable.extLength) - udf_debug("partitionIntegrityTable (part %d)\n", p_index); - - if (phd->freedSpaceTable.extLength) { - struct kernel_lb_addr loc = { - .logicalBlockNum = le32_to_cpu( - phd->freedSpaceTable.extPosition), - .partitionReferenceNum = p_index, - }; - - map->s_fspace.s_table = udf_iget(sb, &loc); - if (!map->s_fspace.s_table) { - udf_debug("cannot load freedSpaceTable (part %d)\n", - p_index); - return 1; - } - - map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; - udf_debug("freedSpaceTable (part %d) @ %ld\n", - p_index, map->s_fspace.s_table->i_ino); - } - - if (phd->freedSpaceBitmap.extLength) { - struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); - if (!bitmap) - return 1; - map->s_fspace.s_bitmap = bitmap; - bitmap->s_extLength = le32_to_cpu( - phd->freedSpaceBitmap.extLength); - bitmap->s_extPosition = le32_to_cpu( - phd->freedSpaceBitmap.extPosition); - map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; - udf_debug("freedSpaceBitmap (part %d) @ %d\n", - p_index, bitmap->s_extPosition); - } - return 0; -} - -static void udf_find_vat_block(struct super_block *sb, int p_index, - int type1_index, sector_t start_block) -{ - struct udf_sb_info *sbi = UDF_SB(sb); - struct udf_part_map *map = &sbi->s_partmaps[p_index]; - sector_t vat_block; - struct kernel_lb_addr ino; - - /* - * VAT file entry is in the last recorded block. Some broken disks have - * it a few blocks before so try a bit harder... - */ - ino.partitionReferenceNum = type1_index; - for (vat_block = start_block; - vat_block >= map->s_partition_root && - vat_block >= start_block - 3 && - !sbi->s_vat_inode; vat_block--) { - ino.logicalBlockNum = vat_block - map->s_partition_root; - sbi->s_vat_inode = udf_iget(sb, &ino); - } -} - -static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) -{ - struct udf_sb_info *sbi = UDF_SB(sb); - struct udf_part_map *map = &sbi->s_partmaps[p_index]; - struct buffer_head *bh = NULL; - struct udf_inode_info *vati; - uint32_t pos; - struct virtualAllocationTable20 *vat20; - sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; - - udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block); - if (!sbi->s_vat_inode && - sbi->s_last_block != blocks - 1) { - pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n", - (unsigned long)sbi->s_last_block, - (unsigned long)blocks - 1); - udf_find_vat_block(sb, p_index, type1_index, blocks - 1); - } - if (!sbi->s_vat_inode) - return 1; - - if (map->s_partition_type == UDF_VIRTUAL_MAP15) { - map->s_type_specific.s_virtual.s_start_offset = 0; - map->s_type_specific.s_virtual.s_num_entries = - (sbi->s_vat_inode->i_size - 36) >> 2; - } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { - vati = UDF_I(sbi->s_vat_inode); - if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { - pos = udf_block_map(sbi->s_vat_inode, 0); - bh = sb_bread(sb, pos); - if (!bh) - return 1; - vat20 = (struct virtualAllocationTable20 *)bh->b_data; - } else { - vat20 = (struct virtualAllocationTable20 *) - vati->i_ext.i_data; - } - - map->s_type_specific.s_virtual.s_start_offset = - le16_to_cpu(vat20->lengthHeader); - map->s_type_specific.s_virtual.s_num_entries = - (sbi->s_vat_inode->i_size - - map->s_type_specific.s_virtual. - s_start_offset) >> 2; - brelse(bh); - } - return 0; -} - -static int udf_load_partdesc(struct super_block *sb, sector_t block) -{ - struct buffer_head *bh; - struct partitionDesc *p; - struct udf_part_map *map; - struct udf_sb_info *sbi = UDF_SB(sb); - int i, type1_idx; - uint16_t partitionNumber; - uint16_t ident; - int ret = 0; - - bh = udf_read_tagged(sb, block, block, &ident); - if (!bh) - return 1; - if (ident != TAG_IDENT_PD) - goto out_bh; - - p = (struct partitionDesc *)bh->b_data; - partitionNumber = le16_to_cpu(p->partitionNumber); - - /* First scan for TYPE1, SPARABLE and METADATA partitions */ - for (i = 0; i < sbi->s_partitions; i++) { - map = &sbi->s_partmaps[i]; - udf_debug("Searching map: (%d == %d)\n", - map->s_partition_num, partitionNumber); - if (map->s_partition_num == partitionNumber && - (map->s_partition_type == UDF_TYPE1_MAP15 || - map->s_partition_type == UDF_SPARABLE_MAP15)) - break; - } - - if (i >= sbi->s_partitions) { - udf_debug("Partition (%d) not found in partition map\n", - partitionNumber); - goto out_bh; - } - - ret = udf_fill_partdesc_info(sb, p, i); - - /* - * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and - * PHYSICAL partitions are already set up - */ - type1_idx = i; - for (i = 0; i < sbi->s_partitions; i++) { - map = &sbi->s_partmaps[i]; - - if (map->s_partition_num == partitionNumber && - (map->s_partition_type == UDF_VIRTUAL_MAP15 || - map->s_partition_type == UDF_VIRTUAL_MAP20 || - map->s_partition_type == UDF_METADATA_MAP25)) - break; - } - - if (i >= sbi->s_partitions) - goto out_bh; - - ret = udf_fill_partdesc_info(sb, p, i); - if (ret) - goto out_bh; - - if (map->s_partition_type == UDF_METADATA_MAP25) { - ret = udf_load_metadata_files(sb, i); - if (ret) { - udf_err(sb, "error loading MetaData partition map %d\n", - i); - goto out_bh; - } - } else { - ret = udf_load_vat(sb, i, type1_idx); - if (ret) - goto out_bh; - /* - * Mark filesystem read-only if we have a partition with - * virtual map since we don't handle writing to it (we - * overwrite blocks instead of relocating them). - */ - sb->s_flags |= MS_RDONLY; - pr_notice("Filesystem marked read-only because writing to pseudooverwrite partition is not implemented\n"); - } -out_bh: - /* In case loading failed, we handle cleanup in udf_fill_super */ - brelse(bh); - return ret; -} - -static int udf_load_sparable_map(struct super_block *sb, - struct udf_part_map *map, - struct sparablePartitionMap *spm) -{ - uint32_t loc; - uint16_t ident; - struct sparingTable *st; - struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing; - int i; - struct buffer_head *bh; - - map->s_partition_type = UDF_SPARABLE_MAP15; - sdata->s_packet_len = le16_to_cpu(spm->packetLength); - if (!is_power_of_2(sdata->s_packet_len)) { - udf_err(sb, "error loading logical volume descriptor: " - "Invalid packet length %u\n", - (unsigned)sdata->s_packet_len); - return -EIO; - } - if (spm->numSparingTables > 4) { - udf_err(sb, "error loading logical volume descriptor: " - "Too many sparing tables (%d)\n", - (int)spm->numSparingTables); - return -EIO; - } - - for (i = 0; i < spm->numSparingTables; i++) { - loc = le32_to_cpu(spm->locSparingTable[i]); - bh = udf_read_tagged(sb, loc, loc, &ident); - if (!bh) - continue; - - st = (struct sparingTable *)bh->b_data; - if (ident != 0 || - strncmp(st->sparingIdent.ident, UDF_ID_SPARING, - strlen(UDF_ID_SPARING)) || - sizeof(*st) + le16_to_cpu(st->reallocationTableLen) > - sb->s_blocksize) { - brelse(bh); - continue; - } - - sdata->s_spar_map[i] = bh; - } - map->s_partition_func = udf_get_pblock_spar15; - return 0; -} - -static int udf_load_logicalvol(struct super_block *sb, sector_t block, - struct kernel_lb_addr *fileset) -{ - struct logicalVolDesc *lvd; - int i, offset; - uint8_t type; - struct udf_sb_info *sbi = UDF_SB(sb); - struct genericPartitionMap *gpm; - uint16_t ident; - struct buffer_head *bh; - unsigned int table_len; - int ret = 0; - - bh = udf_read_tagged(sb, block, block, &ident); - if (!bh) - return 1; - BUG_ON(ident != TAG_IDENT_LVD); - lvd = (struct logicalVolDesc *)bh->b_data; - table_len = le32_to_cpu(lvd->mapTableLength); - if (sizeof(*lvd) + table_len > sb->s_blocksize) { - udf_err(sb, "error loading logical volume descriptor: " - "Partition table too long (%u > %lu)\n", table_len, - sb->s_blocksize - sizeof(*lvd)); - goto out_bh; - } - - ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); - if (ret) - goto out_bh; - - for (i = 0, offset = 0; - i < sbi->s_partitions && offset < table_len; - i++, offset += gpm->partitionMapLength) { - struct udf_part_map *map = &sbi->s_partmaps[i]; - gpm = (struct genericPartitionMap *) - &(lvd->partitionMaps[offset]); - type = gpm->partitionMapType; - if (type == 1) { - struct genericPartitionMap1 *gpm1 = - (struct genericPartitionMap1 *)gpm; - map->s_partition_type = UDF_TYPE1_MAP15; - map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); - map->s_partition_num = le16_to_cpu(gpm1->partitionNum); - map->s_partition_func = NULL; - } else if (type == 2) { - struct udfPartitionMap2 *upm2 = - (struct udfPartitionMap2 *)gpm; - if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, - strlen(UDF_ID_VIRTUAL))) { - u16 suf = - le16_to_cpu(((__le16 *)upm2->partIdent. - identSuffix)[0]); - if (suf < 0x0200) { - map->s_partition_type = - UDF_VIRTUAL_MAP15; - map->s_partition_func = - udf_get_pblock_virt15; - } else { - map->s_partition_type = - UDF_VIRTUAL_MAP20; - map->s_partition_func = - udf_get_pblock_virt20; - } - } else if (!strncmp(upm2->partIdent.ident, - UDF_ID_SPARABLE, - strlen(UDF_ID_SPARABLE))) { - if (udf_load_sparable_map(sb, map, - (struct sparablePartitionMap *)gpm) < 0) - goto out_bh; - } else if (!strncmp(upm2->partIdent.ident, - UDF_ID_METADATA, - strlen(UDF_ID_METADATA))) { - struct udf_meta_data *mdata = - &map->s_type_specific.s_metadata; - struct metadataPartitionMap *mdm = - (struct metadataPartitionMap *) - &(lvd->partitionMaps[offset]); - udf_debug("Parsing Logical vol part %d type %d id=%s\n", - i, type, UDF_ID_METADATA); - - map->s_partition_type = UDF_METADATA_MAP25; - map->s_partition_func = udf_get_pblock_meta25; - - mdata->s_meta_file_loc = - le32_to_cpu(mdm->metadataFileLoc); - mdata->s_mirror_file_loc = - le32_to_cpu(mdm->metadataMirrorFileLoc); - mdata->s_bitmap_file_loc = - le32_to_cpu(mdm->metadataBitmapFileLoc); - mdata->s_alloc_unit_size = - le32_to_cpu(mdm->allocUnitSize); - mdata->s_align_unit_size = - le16_to_cpu(mdm->alignUnitSize); - if (mdm->flags & 0x01) - mdata->s_flags |= MF_DUPLICATE_MD; - - udf_debug("Metadata Ident suffix=0x%x\n", - le16_to_cpu(*(__le16 *) - mdm->partIdent.identSuffix)); - udf_debug("Metadata part num=%d\n", - le16_to_cpu(mdm->partitionNum)); - udf_debug("Metadata part alloc unit size=%d\n", - le32_to_cpu(mdm->allocUnitSize)); - udf_debug("Metadata file loc=%d\n", - le32_to_cpu(mdm->metadataFileLoc)); - udf_debug("Mirror file loc=%d\n", - le32_to_cpu(mdm->metadataMirrorFileLoc)); - udf_debug("Bitmap file loc=%d\n", - le32_to_cpu(mdm->metadataBitmapFileLoc)); - udf_debug("Flags: %d %d\n", - mdata->s_flags, mdm->flags); - } else { - udf_debug("Unknown ident: %s\n", - upm2->partIdent.ident); - continue; - } - map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); - map->s_partition_num = le16_to_cpu(upm2->partitionNum); - } - udf_debug("Partition (%d:%d) type %d on volume %d\n", - i, map->s_partition_num, type, map->s_volumeseqnum); - } - - if (fileset) { - struct long_ad *la = (struct 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)); - -out_bh: - brelse(bh); - return ret; -} - -/* - * udf_load_logicalvolint - * - */ -static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc) -{ - struct buffer_head *bh = NULL; - uint16_t ident; - struct udf_sb_info *sbi = UDF_SB(sb); - struct logicalVolIntegrityDesc *lvid; - - while (loc.extLength > 0 && - (bh = udf_read_tagged(sb, loc.extLocation, - loc.extLocation, &ident)) && - ident == TAG_IDENT_LVID) { - sbi->s_lvid_bh = bh; - lvid = (struct logicalVolIntegrityDesc *)bh->b_data; - - if (lvid->nextIntegrityExt.extLength) - udf_load_logicalvolint(sb, - leea_to_cpu(lvid->nextIntegrityExt)); - - if (sbi->s_lvid_bh != bh) - brelse(bh); - loc.extLength -= sb->s_blocksize; - loc.extLocation++; - } - if (sbi->s_lvid_bh != bh) - brelse(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 noinline int udf_process_sequence(struct super_block *sb, long block, - long lastblock, struct kernel_lb_addr *fileset) -{ - struct buffer_head *bh = NULL; - struct udf_vds_record vds[VDS_POS_LENGTH]; - struct udf_vds_record *curr; - struct generic_desc *gd; - struct volDescPtr *vdp; - int done = 0; - 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 and find which descriptors - * are in it. - */ - for (; (!done && block <= lastblock); block++) { - - bh = udf_read_tagged(sb, block, block, &ident); - if (!bh) { - udf_err(sb, - "Block %llu of volume descriptor sequence is corrupted or we could not read it\n", - (unsigned long long)block); - return 1; - } - - /* 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 */ - curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; - if (vdsn >= curr->volDescSeqNum) { - curr->volDescSeqNum = vdsn; - curr->block = block; - } - break; - case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ - curr = &vds[VDS_POS_VOL_DESC_PTR]; - if (vdsn >= curr->volDescSeqNum) { - curr->volDescSeqNum = vdsn; - curr->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 */ - curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; - if (vdsn >= curr->volDescSeqNum) { - curr->volDescSeqNum = vdsn; - curr->block = block; - } - break; - case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ - curr = &vds[VDS_POS_PARTITION_DESC]; - if (!curr->block) - curr->block = block; - break; - case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ - curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; - if (vdsn >= curr->volDescSeqNum) { - curr->volDescSeqNum = vdsn; - curr->block = block; - } - break; - case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ - curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; - if (vdsn >= curr->volDescSeqNum) { - curr->volDescSeqNum = vdsn; - curr->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; - } - brelse(bh); - } - /* - * Now read interesting descriptors again and process them - * in a suitable order - */ - if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { - udf_err(sb, "Primary Volume Descriptor not found!\n"); - return 1; - } - if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block)) - return 1; - - if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb, - vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset)) - return 1; - - if (vds[VDS_POS_PARTITION_DESC].block) { - /* - * We rescan the whole descriptor sequence to find - * partition descriptor blocks and process them. - */ - for (block = vds[VDS_POS_PARTITION_DESC].block; - block < vds[VDS_POS_TERMINATING_DESC].block; - block++) - if (udf_load_partdesc(sb, block)) - return 1; - } - - return 0; -} - -static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, - struct kernel_lb_addr *fileset) -{ - struct anchorVolDescPtr *anchor; - long main_s, main_e, reserve_s, reserve_e; - - 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; - - /* Process the main & reserve sequences */ - /* responsible for finding the PartitionDesc(s) */ - if (!udf_process_sequence(sb, main_s, main_e, fileset)) - return 1; - return !udf_process_sequence(sb, reserve_s, reserve_e, fileset); -} - -/* - * Check whether there is an anchor block in the given block and - * load Volume Descriptor Sequence if so. - */ -static int udf_check_anchor_block(struct super_block *sb, sector_t block, - struct kernel_lb_addr *fileset) -{ - struct buffer_head *bh; - uint16_t ident; - int ret; - - if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && - udf_fixed_to_variable(block) >= - sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) - return 0; - - bh = udf_read_tagged(sb, block, block, &ident); - if (!bh) - return 0; - if (ident != TAG_IDENT_AVDP) { - brelse(bh); - return 0; - } - ret = udf_load_sequence(sb, bh, fileset); - brelse(bh); - return ret; -} - -/* Search for an anchor volume descriptor pointer */ -static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock, - struct kernel_lb_addr *fileset) -{ - sector_t last[6]; - int i; - struct udf_sb_info *sbi = UDF_SB(sb); - int last_count = 0; - - /* First try user provided anchor */ - if (sbi->s_anchor) { - if (udf_check_anchor_block(sb, sbi->s_anchor, fileset)) - return lastblock; - } - /* - * according to spec, anchor is in either: - * block 256 - * lastblock-256 - * lastblock - * however, if the disc isn't closed, it could be 512. - */ - if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset)) - return lastblock; - /* - * The trouble is which block is the last one. Drives often misreport - * this so we try various possibilities. - */ - last[last_count++] = lastblock; - if (lastblock >= 1) - last[last_count++] = lastblock - 1; - last[last_count++] = lastblock + 1; - if (lastblock >= 2) - last[last_count++] = lastblock - 2; - if (lastblock >= 150) - last[last_count++] = lastblock - 150; - if (lastblock >= 152) - last[last_count++] = lastblock - 152; - - for (i = 0; i < last_count; i++) { - if (last[i] >= sb->s_bdev->bd_inode->i_size >> - sb->s_blocksize_bits) - continue; - if (udf_check_anchor_block(sb, last[i], fileset)) - return last[i]; - if (last[i] < 256) - continue; - if (udf_check_anchor_block(sb, last[i] - 256, fileset)) - return last[i]; - } - - /* Finally try block 512 in case media is open */ - if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset)) - return last[0]; - return 0; -} - -/* - * Find an anchor volume descriptor and load Volume Descriptor Sequence from - * area specified by it. The function expects sbi->s_lastblock to be the last - * block on the media. - * - * Return 1 if ok, 0 if not found. - * - */ -static int udf_find_anchor(struct super_block *sb, - struct kernel_lb_addr *fileset) -{ - sector_t lastblock; - struct udf_sb_info *sbi = UDF_SB(sb); - - lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); - if (lastblock) - goto out; - - /* No anchor found? Try VARCONV conversion of block numbers */ - UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); - /* Firstly, we try to not convert number of the last block */ - lastblock = udf_scan_anchors(sb, - udf_variable_to_fixed(sbi->s_last_block), - fileset); - if (lastblock) - goto out; - - /* Secondly, we try with converted number of the last block */ - lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); - if (!lastblock) { - /* VARCONV didn't help. Clear it. */ - UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); - return 0; - } -out: - sbi->s_last_block = lastblock; - return 1; -} - -/* - * Check Volume Structure Descriptor, find Anchor block and load Volume - * Descriptor Sequence - */ -static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, - int silent, struct kernel_lb_addr *fileset) -{ - struct udf_sb_info *sbi = UDF_SB(sb); - loff_t nsr_off; - - if (!sb_set_blocksize(sb, uopt->blocksize)) { - if (!silent) - udf_warn(sb, "Bad block size\n"); - return 0; - } - sbi->s_last_block = uopt->lastblock; - if (!uopt->novrs) { - /* Check that it is NSR02 compliant */ - nsr_off = udf_check_vsd(sb); - if (!nsr_off) { - if (!silent) - udf_warn(sb, "No VRS found\n"); - return 0; - } - if (nsr_off == -1) - udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n"); - if (!sbi->s_last_block) - sbi->s_last_block = udf_get_last_block(sb); - } else { - udf_debug("Validity check skipped because of novrs option\n"); - } - - /* Look for anchor block and load Volume Descriptor Sequence */ - sbi->s_anchor = uopt->anchor; - if (!udf_find_anchor(sb, fileset)) { - if (!silent) - udf_warn(sb, "No anchor found\n"); - return 0; - } - return 1; -} - -static void udf_open_lvid(struct super_block *sb) -{ - struct udf_sb_info *sbi = UDF_SB(sb); - struct buffer_head *bh = sbi->s_lvid_bh; - struct logicalVolIntegrityDesc *lvid; - struct logicalVolIntegrityDescImpUse *lvidiu; - - if (!bh) - return; - - mutex_lock(&sbi->s_alloc_mutex); - lvid = (struct logicalVolIntegrityDesc *)bh->b_data; - lvidiu = udf_sb_lvidiu(sbi); - - lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; - lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; - udf_time_to_disk_stamp(&lvid->recordingDateAndTime, - CURRENT_TIME); - lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); - - lvid->descTag.descCRC = cpu_to_le16( - crc_itu_t(0, (char *)lvid + sizeof(struct tag), - le16_to_cpu(lvid->descTag.descCRCLength))); - - lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); - mark_buffer_dirty(bh); - sbi->s_lvid_dirty = 0; - mutex_unlock(&sbi->s_alloc_mutex); -} - -static void udf_close_lvid(struct super_block *sb) -{ - struct udf_sb_info *sbi = UDF_SB(sb); - struct buffer_head *bh = sbi->s_lvid_bh; - struct logicalVolIntegrityDesc *lvid; - struct logicalVolIntegrityDescImpUse *lvidiu; - - if (!bh) - return; - - mutex_lock(&sbi->s_alloc_mutex); - lvid = (struct logicalVolIntegrityDesc *)bh->b_data; - lvidiu = udf_sb_lvidiu(sbi); - lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; - lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; - udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); - if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) - lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); - if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) - lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); - if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) - lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); - lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); - - lvid->descTag.descCRC = cpu_to_le16( - crc_itu_t(0, (char *)lvid + sizeof(struct tag), - le16_to_cpu(lvid->descTag.descCRCLength))); - - lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); - /* - * We set buffer uptodate unconditionally here to avoid spurious - * warnings from mark_buffer_dirty() when previous EIO has marked - * the buffer as !uptodate - */ - set_buffer_uptodate(bh); - mark_buffer_dirty(bh); - sbi->s_lvid_dirty = 0; - mutex_unlock(&sbi->s_alloc_mutex); -} - -u64 lvid_get_unique_id(struct super_block *sb) -{ - struct buffer_head *bh; - struct udf_sb_info *sbi = UDF_SB(sb); - struct logicalVolIntegrityDesc *lvid; - struct logicalVolHeaderDesc *lvhd; - u64 uniqueID; - u64 ret; - - bh = sbi->s_lvid_bh; - if (!bh) - return 0; - - lvid = (struct logicalVolIntegrityDesc *)bh->b_data; - lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse; - - mutex_lock(&sbi->s_alloc_mutex); - ret = uniqueID = le64_to_cpu(lvhd->uniqueID); - if (!(++uniqueID & 0xFFFFFFFF)) - uniqueID += 16; - lvhd->uniqueID = cpu_to_le64(uniqueID); - mutex_unlock(&sbi->s_alloc_mutex); - mark_buffer_dirty(bh); - - return ret; -} - -static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) -{ - int i; - int nr_groups = bitmap->s_nr_groups; - int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * - nr_groups); - - for (i = 0; i < nr_groups; i++) - if (bitmap->s_block_bitmap[i]) - brelse(bitmap->s_block_bitmap[i]); - - if (size <= PAGE_SIZE) - kfree(bitmap); - else - vfree(bitmap); -} - -static void udf_free_partition(struct udf_part_map *map) -{ - int i; - struct udf_meta_data *mdata; - - if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) - iput(map->s_uspace.s_table); - if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) - iput(map->s_fspace.s_table); - if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) - udf_sb_free_bitmap(map->s_uspace.s_bitmap); - if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) - udf_sb_free_bitmap(map->s_fspace.s_bitmap); - if (map->s_partition_type == UDF_SPARABLE_MAP15) - for (i = 0; i < 4; i++) - brelse(map->s_type_specific.s_sparing.s_spar_map[i]); - else if (map->s_partition_type == UDF_METADATA_MAP25) { - mdata = &map->s_type_specific.s_metadata; - iput(mdata->s_metadata_fe); - mdata->s_metadata_fe = NULL; - - iput(mdata->s_mirror_fe); - mdata->s_mirror_fe = NULL; - - iput(mdata->s_bitmap_fe); - mdata->s_bitmap_fe = NULL; - } -} - -static int udf_fill_super(struct super_block *sb, void *options, int silent) -{ - int i; - int ret; - struct inode *inode = NULL; - struct udf_options uopt; - struct 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; - uopt.fmode = UDF_INVALID_MODE; - uopt.dmode = UDF_INVALID_MODE; - - sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); - if (!sbi) - return -ENOMEM; - - sb->s_fs_info = sbi; - - mutex_init(&sbi->s_alloc_mutex); - - if (!udf_parse_options((char *)options, &uopt, false)) - goto error_out; - - if (uopt.flags & (1 << UDF_FLAG_UTF8) && - uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { - udf_err(sb, "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; - - sbi->s_flags = uopt.flags; - sbi->s_uid = uopt.uid; - sbi->s_gid = uopt.gid; - sbi->s_umask = uopt.umask; - sbi->s_fmode = uopt.fmode; - sbi->s_dmode = uopt.dmode; - sbi->s_nls_map = uopt.nls_map; - rwlock_init(&sbi->s_cred_lock); - - if (uopt.session == 0xFFFFFFFF) - sbi->s_session = udf_get_last_session(sb); - else - sbi->s_session = uopt.session; - - udf_debug("Multi-session=%d\n", sbi->s_session); - - /* Fill in the rest of the superblock */ - sb->s_op = &udf_sb_ops; - sb->s_export_op = &udf_export_ops; - - sb->s_dirt = 0; - sb->s_magic = UDF_SUPER_MAGIC; - sb->s_time_gran = 1000; - - if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { - ret = udf_load_vrs(sb, &uopt, silent, &fileset); - } else { - uopt.blocksize = bdev_logical_block_size(sb->s_bdev); - ret = udf_load_vrs(sb, &uopt, silent, &fileset); - if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) { - if (!silent) - pr_notice("Rescanning with blocksize %d\n", - UDF_DEFAULT_BLOCKSIZE); - uopt.blocksize = UDF_DEFAULT_BLOCKSIZE; - ret = udf_load_vrs(sb, &uopt, silent, &fileset); - } - } - if (!ret) { - udf_warn(sb, "No partition found (1)\n"); - goto error_out; - } - - udf_debug("Lastblock=%d\n", sbi->s_last_block); - - if (sbi->s_lvid_bh) { - struct logicalVolIntegrityDescImpUse *lvidiu = - udf_sb_lvidiu(sbi); - uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); - uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); - /* uint16_t maxUDFWriteRev = - le16_to_cpu(lvidiu->maxUDFWriteRev); */ - - if (minUDFReadRev > UDF_MAX_READ_VERSION) { - udf_err(sb, "minUDFReadRev=%x (max is %x)\n", - le16_to_cpu(lvidiu->minUDFReadRev), - UDF_MAX_READ_VERSION); - goto error_out; - } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) - sb->s_flags |= MS_RDONLY; - - sbi->s_udfrev = 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 (!sbi->s_partitions) { - udf_warn(sb, "No partition found (2)\n"); - goto error_out; - } - - if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & - UDF_PART_FLAG_READ_ONLY) { - pr_notice("Partition marked readonly; forcing readonly mount\n"); - sb->s_flags |= MS_RDONLY; - } - - if (udf_find_fileset(sb, &fileset, &rootdir)) { - udf_warn(sb, "No fileset found\n"); - goto error_out; - } - - if (!silent) { - struct timestamp ts; - udf_time_to_disk_stamp(&ts, sbi->s_record_time); - udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", - sbi->s_volume_ident, - le16_to_cpu(ts.year), ts.month, ts.day, - ts.hour, ts.minute, le16_to_cpu(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) { - udf_err(sb, "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_make_root(inode); - if (!sb->s_root) { - udf_err(sb, "Couldn't allocate root dentry\n"); - goto error_out; - } - sb->s_maxbytes = MAX_LFS_FILESIZE; - sb->s_max_links = UDF_MAX_LINKS; - return 0; - -error_out: - if (sbi->s_vat_inode) - iput(sbi->s_vat_inode); - if (sbi->s_partitions) - for (i = 0; i < sbi->s_partitions; i++) - udf_free_partition(&sbi->s_partmaps[i]); -#ifdef CONFIG_UDF_NLS - if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) - unload_nls(sbi->s_nls_map); -#endif - if (!(sb->s_flags & MS_RDONLY)) - udf_close_lvid(sb); - brelse(sbi->s_lvid_bh); - - kfree(sbi->s_partmaps); - kfree(sbi); - sb->s_fs_info = NULL; - - return -EINVAL; -} - -void _udf_err(struct super_block *sb, const char *function, - const char *fmt, ...) -{ - struct va_format vaf; - va_list args; - - /* mark sb error */ - if (!(sb->s_flags & MS_RDONLY)) - sb->s_dirt = 1; - - va_start(args, fmt); - - vaf.fmt = fmt; - vaf.va = &args; - - pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf); - - va_end(args); -} - -void _udf_warn(struct super_block *sb, const char *function, - const char *fmt, ...) -{ - struct va_format vaf; - va_list args; - - va_start(args, fmt); - - vaf.fmt = fmt; - vaf.va = &args; - - pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf); - - va_end(args); -} - -static void udf_put_super(struct super_block *sb) -{ - int i; - struct udf_sb_info *sbi; - - sbi = UDF_SB(sb); - - if (sbi->s_vat_inode) - iput(sbi->s_vat_inode); - if (sbi->s_partitions) - for (i = 0; i < sbi->s_partitions; i++) - udf_free_partition(&sbi->s_partmaps[i]); -#ifdef CONFIG_UDF_NLS - if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) - unload_nls(sbi->s_nls_map); -#endif - if (!(sb->s_flags & MS_RDONLY)) - udf_close_lvid(sb); - brelse(sbi->s_lvid_bh); - kfree(sbi->s_partmaps); - kfree(sb->s_fs_info); - sb->s_fs_info = NULL; -} - -static int udf_sync_fs(struct super_block *sb, int wait) -{ - struct udf_sb_info *sbi = UDF_SB(sb); - - mutex_lock(&sbi->s_alloc_mutex); - if (sbi->s_lvid_dirty) { - /* - * Blockdevice will be synced later so we don't have to submit - * the buffer for IO - */ - mark_buffer_dirty(sbi->s_lvid_bh); - sb->s_dirt = 0; - sbi->s_lvid_dirty = 0; - } - mutex_unlock(&sbi->s_alloc_mutex); - - return 0; -} - -static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) -{ - struct super_block *sb = dentry->d_sb; - struct udf_sb_info *sbi = UDF_SB(sb); - struct logicalVolIntegrityDescImpUse *lvidiu; - u64 id = huge_encode_dev(sb->s_bdev->bd_dev); - - if (sbi->s_lvid_bh != NULL) - lvidiu = udf_sb_lvidiu(sbi); - else - lvidiu = NULL; - - buf->f_type = UDF_SUPER_MAGIC; - buf->f_bsize = sb->s_blocksize; - buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; - buf->f_bfree = udf_count_free(sb); - buf->f_bavail = buf->f_bfree; - buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + - le32_to_cpu(lvidiu->numDirs)) : 0) - + buf->f_bfree; - buf->f_ffree = buf->f_bfree; - buf->f_namelen = UDF_NAME_LEN - 2; - buf->f_fsid.val[0] = (u32)id; - buf->f_fsid.val[1] = (u32)(id >> 32); - - return 0; -} - -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; - struct kernel_lb_addr loc; - uint32_t bytes; - uint8_t *ptr; - uint16_t ident; - struct spaceBitmapDesc *bm; - - loc.logicalBlockNum = bitmap->s_extPosition; - loc.partitionReferenceNum = UDF_SB(sb)->s_partition; - bh = udf_read_ptagged(sb, &loc, 0, &ident); - - if (!bh) { - udf_err(sb, "udf_count_free failed\n"); - goto out; - } else if (ident != TAG_IDENT_SBD) { - brelse(bh); - udf_err(sb, "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) { - u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); - accum += bitmap_weight((const unsigned long *)(ptr + index), - cur_bytes * 8); - bytes -= cur_bytes; - if (bytes) { - brelse(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; - } - } - brelse(bh); -out: - return accum; -} - -static unsigned int udf_count_free_table(struct super_block *sb, - struct inode *table) -{ - unsigned int accum = 0; - uint32_t elen; - struct kernel_lb_addr eloc; - int8_t etype; - struct extent_position epos; - - mutex_lock(&UDF_SB(sb)->s_alloc_mutex); - epos.block = UDF_I(table)->i_location; - epos.offset = sizeof(struct unallocSpaceEntry); - epos.bh = NULL; - - while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) - accum += (elen >> table->i_sb->s_blocksize_bits); - - brelse(epos.bh); - mutex_unlock(&UDF_SB(sb)->s_alloc_mutex); - - return accum; -} - -static unsigned int udf_count_free(struct super_block *sb) -{ - unsigned int accum = 0; - struct udf_sb_info *sbi; - struct udf_part_map *map; - - sbi = UDF_SB(sb); - if (sbi->s_lvid_bh) { - struct logicalVolIntegrityDesc *lvid = - (struct logicalVolIntegrityDesc *) - sbi->s_lvid_bh->b_data; - if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { - accum = le32_to_cpu( - lvid->freeSpaceTable[sbi->s_partition]); - if (accum == 0xFFFFFFFF) - accum = 0; - } - } - - if (accum) - return accum; - - map = &sbi->s_partmaps[sbi->s_partition]; - if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { - accum += udf_count_free_bitmap(sb, - map->s_uspace.s_bitmap); - } - if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { - accum += udf_count_free_bitmap(sb, - map->s_fspace.s_bitmap); - } - if (accum) - return accum; - - if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { - accum += udf_count_free_table(sb, - map->s_uspace.s_table); - } - if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { - accum += udf_count_free_table(sb, - map->s_fspace.s_table); - } - - return accum; -} |