Lines Matching +full:rcu +full:- +full:endian +full:- +full:offset
1 // SPDX-License-Identifier: GPL-2.0-only
11 * Max Cohan: Fixed invalid FSINFO offset when info_sector is 0
22 #include <linux/backing-dev.h>
41 * A deserialized copy of the on-disk structure laid out in struct
123 struct super_block *sb = inode->i_sb; in __fat_get_block()
127 int err, offset; in __fat_get_block() local
140 if (iblock != MSDOS_I(inode)->mmu_private >> sb->s_blocksize_bits) { in __fat_get_block()
142 MSDOS_I(inode)->i_pos, MSDOS_I(inode)->mmu_private); in __fat_get_block()
143 return -EIO; in __fat_get_block()
146 last_block = inode->i_blocks >> (sb->s_blocksize_bits - 9); in __fat_get_block()
147 offset = (unsigned long)iblock & (sbi->sec_per_clus - 1); in __fat_get_block()
153 if (!offset && !(iblock < last_block)) { in __fat_get_block()
160 mapped_blocks = sbi->sec_per_clus - offset; in __fat_get_block()
163 MSDOS_I(inode)->mmu_private += *max_blocks << sb->s_blocksize_bits; in __fat_get_block()
171 MSDOS_I(inode)->i_pos, in __fat_get_block()
173 return -EIO; in __fat_get_block()
186 struct super_block *sb = inode->i_sb; in fat_get_block()
187 unsigned long max_blocks = bh_result->b_size >> inode->i_blkbits; in fat_get_block()
193 bh_result->b_size = max_blocks << sb->s_blocksize_bits; in fat_get_block()
215 struct inode *inode = mapping->host; in fat_write_failed()
217 if (to > inode->i_size) { in fat_write_failed()
218 truncate_pagecache(inode, inode->i_size); in fat_write_failed()
219 fat_truncate_blocks(inode, inode->i_size); in fat_write_failed()
232 &MSDOS_I(mapping->host)->mmu_private); in fat_write_begin()
242 struct inode *inode = mapping->host; in fat_write_end()
247 if (!(err < 0) && !(MSDOS_I(inode)->i_attrs & ATTR_ARCH)) { in fat_write_end()
249 MSDOS_I(inode)->i_attrs |= ATTR_ARCH; in fat_write_end()
257 struct file *file = iocb->ki_filp; in fat_direct_IO()
258 struct address_space *mapping = file->f_mapping; in fat_direct_IO()
259 struct inode *inode = mapping->host; in fat_direct_IO()
261 loff_t offset = iocb->ki_pos; in fat_direct_IO() local
266 * FIXME: blockdev_direct_IO() doesn't use ->write_begin(), in fat_direct_IO()
267 * so we need to update the ->mmu_private to block boundary. in fat_direct_IO()
270 * updating ->mmu_private. in fat_direct_IO()
274 loff_t size = offset + count; in fat_direct_IO()
275 if (MSDOS_I(inode)->mmu_private < size) in fat_direct_IO()
281 * condition of fat_get_block() and ->truncate(). in fat_direct_IO()
285 fat_write_failed(mapping, offset + count); in fat_direct_IO()
293 struct super_block *sb = inode->i_sb; in fat_get_block_bmap()
294 unsigned long max_blocks = bh_result->b_size >> inode->i_blkbits; in fat_get_block_bmap()
310 bh_result->b_size = max_blocks << sb->s_blocksize_bits; in fat_get_block_bmap()
320 down_read(&MSDOS_I(mapping->host)->truncate_lock); in _fat_bmap()
322 up_read(&MSDOS_I(mapping->host)->truncate_lock); in _fat_bmap()
328 * fat_block_truncate_page() zeroes out a mapping from file offset `from'
336 return block_truncate_page(inode->i_mapping, from, fat_get_block); in fat_block_truncate_page()
354 * a) i_ino is constant and has nothing with on-disk location.
356 * c) *This* cache is indexed by on-disk location.
362 * 1. readdir() and lookup() do FAT-dir-cache lookup.
363 * 2. rename() unhashes the F-d-c entry and rehashes it in
365 * 3. unlink() and rmdir() unhash F-d-c entry.
371 * 6. fat_evict_inode() unhashes the F-d-c entry.
372 * 7. lookup() and readdir() do igrab() if they find a F-d-c entry
381 spin_lock_init(&sbi->inode_hash_lock); in fat_hash_init()
383 INIT_HLIST_HEAD(&sbi->inode_hashtable[i]); in fat_hash_init()
396 spin_lock_init(&sbi->dir_hash_lock); in dir_hash_init()
398 INIT_HLIST_HEAD(&sbi->dir_hashtable[i]); in dir_hash_init()
403 struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb); in fat_attach()
405 if (inode->i_ino != MSDOS_ROOT_INO) { in fat_attach()
406 struct hlist_head *head = sbi->inode_hashtable in fat_attach()
409 spin_lock(&sbi->inode_hash_lock); in fat_attach()
410 MSDOS_I(inode)->i_pos = i_pos; in fat_attach()
411 hlist_add_head(&MSDOS_I(inode)->i_fat_hash, head); in fat_attach()
412 spin_unlock(&sbi->inode_hash_lock); in fat_attach()
419 if (S_ISDIR(inode->i_mode) && sbi->options.nfs) { in fat_attach()
420 struct hlist_head *d_head = sbi->dir_hashtable; in fat_attach()
421 d_head += fat_dir_hash(MSDOS_I(inode)->i_logstart); in fat_attach()
423 spin_lock(&sbi->dir_hash_lock); in fat_attach()
424 hlist_add_head(&MSDOS_I(inode)->i_dir_hash, d_head); in fat_attach()
425 spin_unlock(&sbi->dir_hash_lock); in fat_attach()
432 struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb); in fat_detach()
433 spin_lock(&sbi->inode_hash_lock); in fat_detach()
434 MSDOS_I(inode)->i_pos = 0; in fat_detach()
435 hlist_del_init(&MSDOS_I(inode)->i_fat_hash); in fat_detach()
436 spin_unlock(&sbi->inode_hash_lock); in fat_detach()
438 if (S_ISDIR(inode->i_mode) && sbi->options.nfs) { in fat_detach()
439 spin_lock(&sbi->dir_hash_lock); in fat_detach()
440 hlist_del_init(&MSDOS_I(inode)->i_dir_hash); in fat_detach()
441 spin_unlock(&sbi->dir_hash_lock); in fat_detach()
449 struct hlist_head *head = sbi->inode_hashtable + fat_hash(i_pos); in fat_iget()
453 spin_lock(&sbi->inode_hash_lock); in fat_iget()
455 BUG_ON(i->vfs_inode.i_sb != sb); in fat_iget()
456 if (i->i_pos != i_pos) in fat_iget()
458 inode = igrab(&i->vfs_inode); in fat_iget()
462 spin_unlock(&sbi->inode_hash_lock); in fat_iget()
478 struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb); in fat_calc_dir_size()
481 inode->i_size = 0; in fat_calc_dir_size()
482 if (MSDOS_I(inode)->i_start == 0) in fat_calc_dir_size()
488 inode->i_size = (fclus + 1) << sbi->cluster_bits; in fat_calc_dir_size()
495 struct super_block *sb = dir->i_sb; in fat_validate_dir()
497 if (dir->i_nlink < 2) { in fat_validate_dir()
500 return -EIO; in fat_validate_dir()
502 if (MSDOS_I(dir)->i_start == 0 || in fat_validate_dir()
503 MSDOS_I(dir)->i_start == MSDOS_SB(sb)->root_cluster) { in fat_validate_dir()
506 return -EIO; in fat_validate_dir()
514 struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb); in fat_fill_inode()
517 MSDOS_I(inode)->i_pos = 0; in fat_fill_inode()
518 inode->i_uid = sbi->options.fs_uid; in fat_fill_inode()
519 inode->i_gid = sbi->options.fs_gid; in fat_fill_inode()
521 inode->i_generation = get_random_u32(); in fat_fill_inode()
523 if ((de->attr & ATTR_DIR) && !IS_FREE(de->name)) { in fat_fill_inode()
524 inode->i_generation &= ~1; in fat_fill_inode()
525 inode->i_mode = fat_make_mode(sbi, de->attr, S_IRWXUGO); in fat_fill_inode()
526 inode->i_op = sbi->dir_ops; in fat_fill_inode()
527 inode->i_fop = &fat_dir_operations; in fat_fill_inode()
529 MSDOS_I(inode)->i_start = fat_get_start(sbi, de); in fat_fill_inode()
530 MSDOS_I(inode)->i_logstart = MSDOS_I(inode)->i_start; in fat_fill_inode()
534 MSDOS_I(inode)->mmu_private = inode->i_size; in fat_fill_inode()
542 inode->i_generation |= 1; in fat_fill_inode()
543 inode->i_mode = fat_make_mode(sbi, de->attr, in fat_fill_inode()
544 ((sbi->options.showexec && !is_exec(de->name + 8)) in fat_fill_inode()
546 MSDOS_I(inode)->i_start = fat_get_start(sbi, de); in fat_fill_inode()
548 MSDOS_I(inode)->i_logstart = MSDOS_I(inode)->i_start; in fat_fill_inode()
549 inode->i_size = le32_to_cpu(de->size); in fat_fill_inode()
550 inode->i_op = &fat_file_inode_operations; in fat_fill_inode()
551 inode->i_fop = &fat_file_operations; in fat_fill_inode()
552 inode->i_mapping->a_ops = &fat_aops; in fat_fill_inode()
553 MSDOS_I(inode)->mmu_private = inode->i_size; in fat_fill_inode()
555 if (de->attr & ATTR_SYS) { in fat_fill_inode()
556 if (sbi->options.sys_immutable) in fat_fill_inode()
557 inode->i_flags |= S_IMMUTABLE; in fat_fill_inode()
559 fat_save_attrs(inode, de->attr); in fat_fill_inode()
561 inode->i_blocks = ((inode->i_size + (sbi->cluster_size - 1)) in fat_fill_inode()
562 & ~((loff_t)sbi->cluster_size - 1)) >> 9; in fat_fill_inode()
564 fat_time_fat2unix(sbi, &inode->i_mtime, de->time, de->date, 0); in fat_fill_inode()
565 inode_set_ctime_to_ts(inode, inode->i_mtime); in fat_fill_inode()
566 if (sbi->options.isvfat) { in fat_fill_inode()
567 fat_time_fat2unix(sbi, &inode->i_atime, 0, de->adate, 0); in fat_fill_inode()
568 fat_time_fat2unix(sbi, &MSDOS_I(inode)->i_crtime, de->ctime, in fat_fill_inode()
569 de->cdate, de->ctime_cs); in fat_fill_inode()
571 inode->i_atime = fat_truncate_atime(sbi, &inode->i_mtime); in fat_fill_inode()
578 if (sbi->options.nfs == FAT_NFS_NOSTALE_RO) in fat_lock_build_inode()
579 mutex_lock(&sbi->nfs_build_inode_lock); in fat_lock_build_inode()
584 if (sbi->options.nfs == FAT_NFS_NOSTALE_RO) in fat_unlock_build_inode()
585 mutex_unlock(&sbi->nfs_build_inode_lock); in fat_unlock_build_inode()
600 inode = ERR_PTR(-ENOMEM); in fat_build_inode()
603 inode->i_ino = iunique(sb, MSDOS_ROOT_INO); in fat_build_inode()
625 if ((inode->i_blocks << 9) > in fat_free_eofblocks()
626 round_up(MSDOS_I(inode)->mmu_private, in fat_free_eofblocks()
627 MSDOS_SB(inode->i_sb)->cluster_size)) { in fat_free_eofblocks()
630 fat_truncate_blocks(inode, MSDOS_I(inode)->mmu_private); in fat_free_eofblocks()
639 fat_msg(inode->i_sb, KERN_WARNING, "Failed to " in fat_free_eofblocks()
650 truncate_inode_pages_final(&inode->i_data); in fat_evict_inode()
651 if (!inode->i_nlink) { in fat_evict_inode()
652 inode->i_size = 0; in fat_evict_inode()
675 if (sbi->dirty) { in fat_set_state()
691 b = (struct fat_boot_sector *) bh->b_data; in fat_set_state()
695 b->fat32.state |= FAT_STATE_DIRTY; in fat_set_state()
697 b->fat32.state &= ~FAT_STATE_DIRTY; in fat_set_state()
700 b->fat16.state |= FAT_STATE_DIRTY; in fat_set_state()
702 b->fat16.state &= ~FAT_STATE_DIRTY; in fat_set_state()
712 if (opts->iocharset != fat_default_iocharset) { in fat_reset_iocharset()
713 /* Note: opts->iocharset can be NULL here */ in fat_reset_iocharset()
714 kfree(opts->iocharset); in fat_reset_iocharset()
715 opts->iocharset = fat_default_iocharset; in fat_reset_iocharset()
721 struct msdos_sb_info *sbi = container_of(p, struct msdos_sb_info, rcu); in delayed_free()
722 unload_nls(sbi->nls_disk); in delayed_free()
723 unload_nls(sbi->nls_io); in delayed_free()
724 fat_reset_iocharset(&sbi->options); in delayed_free()
734 iput(sbi->fsinfo_inode); in fat_put_super()
735 iput(sbi->fat_inode); in fat_put_super()
737 call_rcu(&sbi->rcu, delayed_free); in fat_put_super()
749 init_rwsem(&ei->truncate_lock); in fat_alloc_inode()
751 ei->mmu_private = 0; in fat_alloc_inode()
752 ei->i_start = 0; in fat_alloc_inode()
753 ei->i_logstart = 0; in fat_alloc_inode()
754 ei->i_attrs = 0; in fat_alloc_inode()
755 ei->i_pos = 0; in fat_alloc_inode()
756 ei->i_crtime.tv_sec = 0; in fat_alloc_inode()
757 ei->i_crtime.tv_nsec = 0; in fat_alloc_inode()
759 return &ei->vfs_inode; in fat_alloc_inode()
771 spin_lock_init(&ei->cache_lru_lock); in init_once()
772 ei->nr_caches = 0; in init_once()
773 ei->cache_valid_id = FAT_CACHE_VALID + 1; in init_once()
774 INIT_LIST_HEAD(&ei->cache_lru); in init_once()
775 INIT_HLIST_NODE(&ei->i_fat_hash); in init_once()
776 INIT_HLIST_NODE(&ei->i_dir_hash); in init_once()
777 inode_init_once(&ei->vfs_inode); in init_once()
788 return -ENOMEM; in fat_init_inodecache()
795 * Make sure all delayed rcu free inodes are flushed before we in fat_destroy_inodecache()
806 *flags |= SB_NODIRATIME | (sbi->options.isvfat ? 0 : SB_NOATIME); in fat_remount()
823 struct super_block *sb = dentry->d_sb; in fat_statfs()
825 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); in fat_statfs()
828 if (sbi->free_clusters == -1 || !sbi->free_clus_valid) { in fat_statfs()
829 int err = fat_count_free_clusters(dentry->d_sb); in fat_statfs()
834 buf->f_type = dentry->d_sb->s_magic; in fat_statfs()
835 buf->f_bsize = sbi->cluster_size; in fat_statfs()
836 buf->f_blocks = sbi->max_cluster - FAT_START_ENT; in fat_statfs()
837 buf->f_bfree = sbi->free_clusters; in fat_statfs()
838 buf->f_bavail = sbi->free_clusters; in fat_statfs()
839 buf->f_fsid = u64_to_fsid(id); in fat_statfs()
840 buf->f_namelen = in fat_statfs()
841 (sbi->options.isvfat ? FAT_LFN_LEN : 12) * NLS_MAX_CHARSET_SIZE; in fat_statfs()
848 struct super_block *sb = inode->i_sb; in __fat_write_inode()
854 int err, offset; in __fat_write_inode() local
856 if (inode->i_ino == MSDOS_ROOT_INO) in __fat_write_inode()
864 fat_get_blknr_offset(sbi, i_pos, &blocknr, &offset); in __fat_write_inode()
869 return -EIO; in __fat_write_inode()
871 spin_lock(&sbi->inode_hash_lock); in __fat_write_inode()
872 if (i_pos != MSDOS_I(inode)->i_pos) { in __fat_write_inode()
873 spin_unlock(&sbi->inode_hash_lock); in __fat_write_inode()
878 raw_entry = &((struct msdos_dir_entry *) (bh->b_data))[offset]; in __fat_write_inode()
879 if (S_ISDIR(inode->i_mode)) in __fat_write_inode()
880 raw_entry->size = 0; in __fat_write_inode()
882 raw_entry->size = cpu_to_le32(inode->i_size); in __fat_write_inode()
883 raw_entry->attr = fat_make_attrs(inode); in __fat_write_inode()
884 fat_set_start(raw_entry, MSDOS_I(inode)->i_logstart); in __fat_write_inode()
885 fat_time_unix2fat(sbi, &inode->i_mtime, &raw_entry->time, in __fat_write_inode()
886 &raw_entry->date, NULL); in __fat_write_inode()
887 if (sbi->options.isvfat) { in __fat_write_inode()
889 fat_time_unix2fat(sbi, &inode->i_atime, &atime, in __fat_write_inode()
890 &raw_entry->adate, NULL); in __fat_write_inode()
891 fat_time_unix2fat(sbi, &MSDOS_I(inode)->i_crtime, &raw_entry->ctime, in __fat_write_inode()
892 &raw_entry->cdate, &raw_entry->ctime_cs); in __fat_write_inode()
894 spin_unlock(&sbi->inode_hash_lock); in __fat_write_inode()
907 if (inode->i_ino == MSDOS_FSINFO_INO) { in fat_write_inode()
908 struct super_block *sb = inode->i_sb; in fat_write_inode()
910 mutex_lock(&MSDOS_SB(sb)->s_lock); in fat_write_inode()
912 mutex_unlock(&MSDOS_SB(sb)->s_lock); in fat_write_inode()
914 err = __fat_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL); in fat_write_inode()
941 struct msdos_sb_info *sbi = MSDOS_SB(root->d_sb); in fat_show_options()
942 struct fat_mount_options *opts = &sbi->options; in fat_show_options()
943 int isvfat = opts->isvfat; in fat_show_options()
945 if (!uid_eq(opts->fs_uid, GLOBAL_ROOT_UID)) in fat_show_options()
947 from_kuid_munged(&init_user_ns, opts->fs_uid)); in fat_show_options()
948 if (!gid_eq(opts->fs_gid, GLOBAL_ROOT_GID)) in fat_show_options()
950 from_kgid_munged(&init_user_ns, opts->fs_gid)); in fat_show_options()
951 seq_printf(m, ",fmask=%04o", opts->fs_fmask); in fat_show_options()
952 seq_printf(m, ",dmask=%04o", opts->fs_dmask); in fat_show_options()
953 if (opts->allow_utime) in fat_show_options()
954 seq_printf(m, ",allow_utime=%04o", opts->allow_utime); in fat_show_options()
955 if (sbi->nls_disk) in fat_show_options()
957 seq_printf(m, ",codepage=%s", &sbi->nls_disk->charset[2]); in fat_show_options()
959 if (sbi->nls_io) in fat_show_options()
960 seq_printf(m, ",iocharset=%s", sbi->nls_io->charset); in fat_show_options()
962 switch (opts->shortname) { in fat_show_options()
980 if (opts->name_check != 'n') in fat_show_options()
981 seq_printf(m, ",check=%c", opts->name_check); in fat_show_options()
982 if (opts->usefree) in fat_show_options()
984 if (opts->quiet) in fat_show_options()
986 if (opts->showexec) in fat_show_options()
988 if (opts->sys_immutable) in fat_show_options()
991 if (opts->dotsOK) in fat_show_options()
993 if (opts->nocase) in fat_show_options()
996 if (opts->utf8) in fat_show_options()
998 if (opts->unicode_xlate) in fat_show_options()
1000 if (!opts->numtail) in fat_show_options()
1002 if (opts->rodir) in fat_show_options()
1005 if (opts->flush) in fat_show_options()
1007 if (opts->tz_set) { in fat_show_options()
1008 if (opts->time_offset) in fat_show_options()
1009 seq_printf(m, ",time_offset=%d", opts->time_offset); in fat_show_options()
1013 if (opts->errors == FAT_ERRORS_CONT) in fat_show_options()
1015 else if (opts->errors == FAT_ERRORS_PANIC) in fat_show_options()
1018 seq_puts(m, ",errors=remount-ro"); in fat_show_options()
1019 if (opts->nfs == FAT_NFS_NOSTALE_RO) in fat_show_options()
1021 else if (opts->nfs) in fat_show_options()
1023 if (opts->discard) in fat_show_options()
1025 if (opts->dos1xfloppy) in fat_show_options()
1069 {Opt_err_ro, "errors=remount-ro"},
1134 opts->isvfat = is_vfat; in parse_options()
1136 opts->fs_uid = current_uid(); in parse_options()
1137 opts->fs_gid = current_gid(); in parse_options()
1138 opts->fs_fmask = opts->fs_dmask = current_umask(); in parse_options()
1139 opts->allow_utime = -1; in parse_options()
1140 opts->codepage = fat_default_codepage; in parse_options()
1143 opts->shortname = VFAT_SFN_DISPLAY_WINNT|VFAT_SFN_CREATE_WIN95; in parse_options()
1144 opts->rodir = 0; in parse_options()
1146 opts->shortname = 0; in parse_options()
1147 opts->rodir = 1; in parse_options()
1149 opts->name_check = 'n'; in parse_options()
1150 opts->quiet = opts->showexec = opts->sys_immutable = opts->dotsOK = 0; in parse_options()
1151 opts->unicode_xlate = 0; in parse_options()
1152 opts->numtail = 1; in parse_options()
1153 opts->usefree = opts->nocase = 0; in parse_options()
1154 opts->tz_set = 0; in parse_options()
1155 opts->nfs = 0; in parse_options()
1156 opts->errors = FAT_ERRORS_RO; in parse_options()
1159 opts->utf8 = IS_ENABLED(CONFIG_FAT_DEFAULT_UTF8) && is_vfat; in parse_options()
1178 opts->name_check = 's'; in parse_options()
1181 opts->name_check = 'r'; in parse_options()
1184 opts->name_check = 'n'; in parse_options()
1187 opts->usefree = 1; in parse_options()
1191 opts->nocase = 1; in parse_options()
1194 opts->shortname = VFAT_SFN_DISPLAY_WIN95 in parse_options()
1199 opts->quiet = 1; in parse_options()
1202 opts->showexec = 1; in parse_options()
1208 opts->sys_immutable = 1; in parse_options()
1212 return -EINVAL; in parse_options()
1213 opts->fs_uid = make_kuid(current_user_ns(), option); in parse_options()
1214 if (!uid_valid(opts->fs_uid)) in parse_options()
1215 return -EINVAL; in parse_options()
1219 return -EINVAL; in parse_options()
1220 opts->fs_gid = make_kgid(current_user_ns(), option); in parse_options()
1221 if (!gid_valid(opts->fs_gid)) in parse_options()
1222 return -EINVAL; in parse_options()
1226 return -EINVAL; in parse_options()
1227 opts->fs_fmask = opts->fs_dmask = option; in parse_options()
1231 return -EINVAL; in parse_options()
1232 opts->fs_dmask = option; in parse_options()
1236 return -EINVAL; in parse_options()
1237 opts->fs_fmask = option; in parse_options()
1241 return -EINVAL; in parse_options()
1242 opts->allow_utime = option & (S_IWGRP | S_IWOTH); in parse_options()
1246 return -EINVAL; in parse_options()
1247 opts->codepage = option; in parse_options()
1250 opts->flush = 1; in parse_options()
1254 return -EINVAL; in parse_options()
1256 * GMT+-12 zones may have DST corrections so at least in parse_options()
1260 if (option < -24 * 60 || option > 24 * 60) in parse_options()
1261 return -EINVAL; in parse_options()
1262 opts->tz_set = 1; in parse_options()
1263 opts->time_offset = option; in parse_options()
1266 opts->tz_set = 1; in parse_options()
1267 opts->time_offset = 0; in parse_options()
1270 opts->errors = FAT_ERRORS_CONT; in parse_options()
1273 opts->errors = FAT_ERRORS_PANIC; in parse_options()
1276 opts->errors = FAT_ERRORS_RO; in parse_options()
1279 opts->nfs = FAT_NFS_STALE_RW; in parse_options()
1282 opts->nfs = FAT_NFS_NOSTALE_RO; in parse_options()
1285 opts->dos1xfloppy = 1; in parse_options()
1290 opts->dotsOK = 1; in parse_options()
1293 opts->dotsOK = 0; in parse_options()
1301 return -ENOMEM; in parse_options()
1302 opts->iocharset = iocharset; in parse_options()
1305 opts->shortname = VFAT_SFN_DISPLAY_LOWER in parse_options()
1309 opts->shortname = VFAT_SFN_DISPLAY_WIN95 in parse_options()
1313 opts->shortname = VFAT_SFN_DISPLAY_WINNT in parse_options()
1317 opts->shortname = VFAT_SFN_DISPLAY_WINNT in parse_options()
1321 opts->utf8 = 0; in parse_options()
1324 opts->utf8 = 1; in parse_options()
1327 opts->unicode_xlate = 0; in parse_options()
1330 opts->unicode_xlate = 1; in parse_options()
1333 opts->numtail = 1; /* negated option */ in parse_options()
1336 opts->numtail = 0; /* negated option */ in parse_options()
1339 opts->rodir = 1; in parse_options()
1342 opts->discard = 1; in parse_options()
1357 return -EINVAL; in parse_options()
1362 /* UTF-8 doesn't provide FAT semantics */ in parse_options()
1363 if (!strcmp(opts->iocharset, "utf8")) { in parse_options()
1370 if (opts->allow_utime == (unsigned short)-1) in parse_options()
1371 opts->allow_utime = ~opts->fs_dmask & (S_IWGRP | S_IWOTH); in parse_options()
1372 if (opts->unicode_xlate) in parse_options()
1373 opts->utf8 = 0; in parse_options()
1374 if (opts->nfs == FAT_NFS_NOSTALE_RO) { in parse_options()
1375 sb->s_flags |= SB_RDONLY; in parse_options()
1376 sb->s_export_op = &fat_export_ops_nostale; in parse_options()
1384 struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb); in fat_read_root()
1387 MSDOS_I(inode)->i_pos = MSDOS_ROOT_INO; in fat_read_root()
1388 inode->i_uid = sbi->options.fs_uid; in fat_read_root()
1389 inode->i_gid = sbi->options.fs_gid; in fat_read_root()
1391 inode->i_generation = 0; in fat_read_root()
1392 inode->i_mode = fat_make_mode(sbi, ATTR_DIR, S_IRWXUGO); in fat_read_root()
1393 inode->i_op = sbi->dir_ops; in fat_read_root()
1394 inode->i_fop = &fat_dir_operations; in fat_read_root()
1396 MSDOS_I(inode)->i_start = sbi->root_cluster; in fat_read_root()
1401 MSDOS_I(inode)->i_start = 0; in fat_read_root()
1402 inode->i_size = sbi->dir_entries * sizeof(struct msdos_dir_entry); in fat_read_root()
1404 inode->i_blocks = ((inode->i_size + (sbi->cluster_size - 1)) in fat_read_root()
1405 & ~((loff_t)sbi->cluster_size - 1)) >> 9; in fat_read_root()
1406 MSDOS_I(inode)->i_logstart = 0; in fat_read_root()
1407 MSDOS_I(inode)->mmu_private = inode->i_size; in fat_read_root()
1410 inode->i_mtime = inode->i_atime = inode_set_ctime(inode, 0, 0); in fat_read_root()
1422 unsigned long ent_per_sec = sb->s_blocksize * 8 / sbi->fat_bits; in calc_fat_clusters()
1423 return ent_per_sec * sbi->fat_length; in calc_fat_clusters()
1426 return sbi->fat_length * sb->s_blocksize * 8 / sbi->fat_bits; in calc_fat_clusters()
1431 if (get_unaligned_le16(&b->sector_size)) in fat_bpb_is_zero()
1433 if (b->sec_per_clus) in fat_bpb_is_zero()
1435 if (b->reserved) in fat_bpb_is_zero()
1437 if (b->fats) in fat_bpb_is_zero()
1439 if (get_unaligned_le16(&b->dir_entries)) in fat_bpb_is_zero()
1441 if (get_unaligned_le16(&b->sectors)) in fat_bpb_is_zero()
1443 if (b->media) in fat_bpb_is_zero()
1445 if (b->fat_length) in fat_bpb_is_zero()
1447 if (b->secs_track) in fat_bpb_is_zero()
1449 if (b->heads) in fat_bpb_is_zero()
1457 int error = -EINVAL; in fat_read_bpb()
1461 bpb->fat_sector_size = get_unaligned_le16(&b->sector_size); in fat_read_bpb()
1462 bpb->fat_sec_per_clus = b->sec_per_clus; in fat_read_bpb()
1463 bpb->fat_reserved = le16_to_cpu(b->reserved); in fat_read_bpb()
1464 bpb->fat_fats = b->fats; in fat_read_bpb()
1465 bpb->fat_dir_entries = get_unaligned_le16(&b->dir_entries); in fat_read_bpb()
1466 bpb->fat_sectors = get_unaligned_le16(&b->sectors); in fat_read_bpb()
1467 bpb->fat_fat_length = le16_to_cpu(b->fat_length); in fat_read_bpb()
1468 bpb->fat_total_sect = le32_to_cpu(b->total_sect); in fat_read_bpb()
1470 bpb->fat16_state = b->fat16.state; in fat_read_bpb()
1471 bpb->fat16_vol_id = get_unaligned_le32(b->fat16.vol_id); in fat_read_bpb()
1473 bpb->fat32_length = le32_to_cpu(b->fat32.length); in fat_read_bpb()
1474 bpb->fat32_root_cluster = le32_to_cpu(b->fat32.root_cluster); in fat_read_bpb()
1475 bpb->fat32_info_sector = le16_to_cpu(b->fat32.info_sector); in fat_read_bpb()
1476 bpb->fat32_state = b->fat32.state; in fat_read_bpb()
1477 bpb->fat32_vol_id = get_unaligned_le32(b->fat32.vol_id); in fat_read_bpb()
1480 if (!bpb->fat_reserved) { in fat_read_bpb()
1486 if (!bpb->fat_fats) { in fat_read_bpb()
1493 * Earlier we checked here that b->secs_track and b->head are nonzero, in fat_read_bpb()
1497 if (!fat_valid_media(b->media)) { in fat_read_bpb()
1500 (unsigned)b->media); in fat_read_bpb()
1504 if (!is_power_of_2(bpb->fat_sector_size) in fat_read_bpb()
1505 || (bpb->fat_sector_size < 512) in fat_read_bpb()
1506 || (bpb->fat_sector_size > 4096)) { in fat_read_bpb()
1509 (unsigned)bpb->fat_sector_size); in fat_read_bpb()
1513 if (!is_power_of_2(bpb->fat_sec_per_clus)) { in fat_read_bpb()
1516 (unsigned)bpb->fat_sec_per_clus); in fat_read_bpb()
1520 if (bpb->fat_fat_length == 0 && bpb->fat32_length == 0) { in fat_read_bpb()
1537 sector_t bd_sects = bdev_nr_sectors(sb->s_bdev); in fat_read_static_bpb()
1539 int error = -EINVAL; in fat_read_static_bpb()
1542 /* 16-bit DOS 1.x reliably wrote bootstrap short-jmp code */ in fat_read_static_bpb()
1543 if (b->ignored[0] != 0xeb || b->ignored[2] != 0x90) { in fat_read_static_bpb()
1551 * If any value in this region is non-zero, it isn't archaic in fat_read_static_bpb()
1557 "%s; DOS 2.x BPB is non-zero", notdos1x); in fat_read_static_bpb()
1581 bpb->fat_sector_size = SECTOR_SIZE; in fat_read_static_bpb()
1582 bpb->fat_sec_per_clus = fdefaults->sec_per_clus; in fat_read_static_bpb()
1583 bpb->fat_reserved = 1; in fat_read_static_bpb()
1584 bpb->fat_fats = 2; in fat_read_static_bpb()
1585 bpb->fat_dir_entries = fdefaults->dir_entries; in fat_read_static_bpb()
1586 bpb->fat_sectors = fdefaults->nr_sectors; in fat_read_static_bpb()
1587 bpb->fat_fat_length = fdefaults->fat_length; in fat_read_static_bpb()
1596 * Read the super block of an MS-DOS FS.
1621 return -ENOMEM; in fat_fill_super()
1622 sb->s_fs_info = sbi; in fat_fill_super()
1624 sb->s_flags |= SB_NODIRATIME; in fat_fill_super()
1625 sb->s_magic = MSDOS_SUPER_MAGIC; in fat_fill_super()
1626 sb->s_op = &fat_sops; in fat_fill_super()
1627 sb->s_export_op = &fat_export_ops; in fat_fill_super()
1632 sb->s_time_gran = 1; in fat_fill_super()
1633 mutex_init(&sbi->nfs_build_inode_lock); in fat_fill_super()
1634 ratelimit_state_init(&sbi->ratelimit, DEFAULT_RATELIMIT_INTERVAL, in fat_fill_super()
1637 error = parse_options(sb, data, isvfat, silent, &debug, &sbi->options); in fat_fill_super()
1641 setup(sb); /* flavour-specific stuff that needs options */ in fat_fill_super()
1643 error = -EIO; in fat_fill_super()
1651 error = fat_read_bpb(sb, (struct fat_boot_sector *)bh->b_data, silent, in fat_fill_super()
1653 if (error == -EINVAL && sbi->options.dos1xfloppy) in fat_fill_super()
1655 (struct fat_boot_sector *)bh->b_data, silent, &bpb); in fat_fill_super()
1658 if (error == -EINVAL) in fat_fill_super()
1664 sbi->sec_per_clus = bpb.fat_sec_per_clus; in fat_fill_super()
1666 error = -EIO; in fat_fill_super()
1667 if (logical_sector_size < sb->s_blocksize) { in fat_fill_super()
1673 if (logical_sector_size > sb->s_blocksize) { in fat_fill_super()
1687 sb->s_blocksize); in fat_fill_super()
1693 mutex_init(&sbi->s_lock); in fat_fill_super()
1694 sbi->cluster_size = sb->s_blocksize * sbi->sec_per_clus; in fat_fill_super()
1695 sbi->cluster_bits = ffs(sbi->cluster_size) - 1; in fat_fill_super()
1696 sbi->fats = bpb.fat_fats; in fat_fill_super()
1697 sbi->fat_bits = 0; /* Don't know yet */ in fat_fill_super()
1698 sbi->fat_start = bpb.fat_reserved; in fat_fill_super()
1699 sbi->fat_length = bpb.fat_fat_length; in fat_fill_super()
1700 sbi->root_cluster = 0; in fat_fill_super()
1701 sbi->free_clusters = -1; /* Don't know yet */ in fat_fill_super()
1702 sbi->free_clus_valid = 0; in fat_fill_super()
1703 sbi->prev_free = FAT_START_ENT; in fat_fill_super()
1704 sb->s_maxbytes = 0xffffffff; in fat_fill_super()
1706 sb->s_time_min = ts.tv_sec; in fat_fill_super()
1710 sb->s_time_max = ts.tv_sec; in fat_fill_super()
1712 if (!sbi->fat_length && bpb.fat32_length) { in fat_fill_super()
1717 sbi->fat_bits = 32; in fat_fill_super()
1718 sbi->fat_length = bpb.fat32_length; in fat_fill_super()
1719 sbi->root_cluster = bpb.fat32_root_cluster; in fat_fill_super()
1721 /* MC - if info_sector is 0, don't multiply by 0 */ in fat_fill_super()
1722 sbi->fsinfo_sector = bpb.fat32_info_sector; in fat_fill_super()
1723 if (sbi->fsinfo_sector == 0) in fat_fill_super()
1724 sbi->fsinfo_sector = 1; in fat_fill_super()
1726 fsinfo_bh = sb_bread(sb, sbi->fsinfo_sector); in fat_fill_super()
1729 " (sector = %lu)", sbi->fsinfo_sector); in fat_fill_super()
1733 fsinfo = (struct fat_boot_fsinfo *)fsinfo_bh->b_data; in fat_fill_super()
1737 le32_to_cpu(fsinfo->signature1), in fat_fill_super()
1738 le32_to_cpu(fsinfo->signature2), in fat_fill_super()
1739 sbi->fsinfo_sector); in fat_fill_super()
1741 if (sbi->options.usefree) in fat_fill_super()
1742 sbi->free_clus_valid = 1; in fat_fill_super()
1743 sbi->free_clusters = le32_to_cpu(fsinfo->free_clusters); in fat_fill_super()
1744 sbi->prev_free = le32_to_cpu(fsinfo->next_cluster); in fat_fill_super()
1750 /* interpret volume ID as a little endian 32 bit integer */ in fat_fill_super()
1752 sbi->vol_id = bpb.fat32_vol_id; in fat_fill_super()
1754 sbi->vol_id = bpb.fat16_vol_id; in fat_fill_super()
1756 sbi->dir_per_block = sb->s_blocksize / sizeof(struct msdos_dir_entry); in fat_fill_super()
1757 sbi->dir_per_block_bits = ffs(sbi->dir_per_block) - 1; in fat_fill_super()
1759 sbi->dir_start = sbi->fat_start + sbi->fats * sbi->fat_length; in fat_fill_super()
1760 sbi->dir_entries = bpb.fat_dir_entries; in fat_fill_super()
1761 if (sbi->dir_entries & (sbi->dir_per_block - 1)) { in fat_fill_super()
1764 " (%u)", sbi->dir_entries); in fat_fill_super()
1768 rootdir_sectors = sbi->dir_entries in fat_fill_super()
1769 * sizeof(struct msdos_dir_entry) / sb->s_blocksize; in fat_fill_super()
1770 sbi->data_start = sbi->dir_start + rootdir_sectors; in fat_fill_super()
1775 total_clusters = (total_sectors - sbi->data_start) / sbi->sec_per_clus; in fat_fill_super()
1778 sbi->fat_bits = (total_clusters > MAX_FAT12) ? 16 : 12; in fat_fill_super()
1782 sbi->dirty = bpb.fat32_state & FAT_STATE_DIRTY; in fat_fill_super()
1784 sbi->dirty = bpb.fat16_state & FAT_STATE_DIRTY; in fat_fill_super()
1788 total_clusters = min(total_clusters, fat_clusters - FAT_START_ENT); in fat_fill_super()
1796 sbi->max_cluster = total_clusters + FAT_START_ENT; in fat_fill_super()
1798 if (sbi->free_clusters != -1 && sbi->free_clusters > total_clusters) in fat_fill_super()
1799 sbi->free_clusters = -1; in fat_fill_super()
1801 sbi->prev_free %= sbi->max_cluster; in fat_fill_super()
1802 if (sbi->prev_free < FAT_START_ENT) in fat_fill_super()
1803 sbi->prev_free = FAT_START_ENT; in fat_fill_super()
1822 error = -EINVAL; in fat_fill_super()
1823 sprintf(buf, "cp%d", sbi->options.codepage); in fat_fill_super()
1824 sbi->nls_disk = load_nls(buf); in fat_fill_super()
1825 if (!sbi->nls_disk) { in fat_fill_super()
1831 if (sbi->options.isvfat) { in fat_fill_super()
1832 sbi->nls_io = load_nls(sbi->options.iocharset); in fat_fill_super()
1833 if (!sbi->nls_io) { in fat_fill_super()
1835 sbi->options.iocharset); in fat_fill_super()
1840 error = -ENOMEM; in fat_fill_super()
1844 sbi->fat_inode = fat_inode; in fat_fill_super()
1849 fsinfo_inode->i_ino = MSDOS_FSINFO_INO; in fat_fill_super()
1850 sbi->fsinfo_inode = fsinfo_inode; in fat_fill_super()
1856 root_inode->i_ino = MSDOS_ROOT_INO; in fat_fill_super()
1863 error = -ENOMEM; in fat_fill_super()
1866 sb->s_root = d_make_root(root_inode); in fat_fill_super()
1867 if (!sb->s_root) { in fat_fill_super()
1872 if (sbi->options.discard && !bdev_max_discard_sectors(sb->s_bdev)) in fat_fill_super()
1880 error = -EINVAL; in fat_fill_super()
1887 unload_nls(sbi->nls_io); in fat_fill_super()
1888 unload_nls(sbi->nls_disk); in fat_fill_super()
1889 fat_reset_iocharset(&sbi->options); in fat_fill_super()
1890 sb->s_fs_info = NULL; in fat_fill_super()
1914 ret = filemap_fdatawrite(inode->i_mapping); in writeback_inode()
1929 if (!MSDOS_SB(sb)->options.flush) in fat_flush_inodes()
1936 ret = sync_blockdev_nowait(sb->s_bdev); in fat_flush_inodes()