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793 lines
20 KiB
793 lines
20 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* linux/fs/hpfs/super.c |
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* |
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* Mikulas Patocka ([email protected]), 1998-1999 |
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* |
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* mounting, unmounting, error handling |
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*/ |
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|
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#include "hpfs_fn.h" |
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#include <linux/module.h> |
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#include <linux/parser.h> |
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#include <linux/init.h> |
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#include <linux/statfs.h> |
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#include <linux/magic.h> |
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#include <linux/sched.h> |
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#include <linux/bitmap.h> |
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#include <linux/slab.h> |
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#include <linux/seq_file.h> |
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|
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/* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */ |
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|
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static void mark_dirty(struct super_block *s, int remount) |
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{ |
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if (hpfs_sb(s)->sb_chkdsk && (remount || !sb_rdonly(s))) { |
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struct buffer_head *bh; |
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struct hpfs_spare_block *sb; |
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if ((sb = hpfs_map_sector(s, 17, &bh, 0))) { |
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sb->dirty = 1; |
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sb->old_wrote = 0; |
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mark_buffer_dirty(bh); |
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sync_dirty_buffer(bh); |
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brelse(bh); |
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} |
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} |
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} |
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|
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/* Mark the filesystem clean (mark it dirty for chkdsk if chkdsk==2 or if there |
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were errors) */ |
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|
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static void unmark_dirty(struct super_block *s) |
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{ |
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struct buffer_head *bh; |
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struct hpfs_spare_block *sb; |
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if (sb_rdonly(s)) return; |
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sync_blockdev(s->s_bdev); |
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if ((sb = hpfs_map_sector(s, 17, &bh, 0))) { |
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sb->dirty = hpfs_sb(s)->sb_chkdsk > 1 - hpfs_sb(s)->sb_was_error; |
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sb->old_wrote = hpfs_sb(s)->sb_chkdsk >= 2 && !hpfs_sb(s)->sb_was_error; |
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mark_buffer_dirty(bh); |
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sync_dirty_buffer(bh); |
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brelse(bh); |
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} |
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} |
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|
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/* Filesystem error... */ |
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void hpfs_error(struct super_block *s, const char *fmt, ...) |
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{ |
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struct va_format vaf; |
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va_list args; |
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va_start(args, fmt); |
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vaf.fmt = fmt; |
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vaf.va = &args; |
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pr_err("filesystem error: %pV", &vaf); |
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va_end(args); |
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if (!hpfs_sb(s)->sb_was_error) { |
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if (hpfs_sb(s)->sb_err == 2) { |
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pr_cont("; crashing the system because you wanted it\n"); |
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mark_dirty(s, 0); |
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panic("HPFS panic"); |
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} else if (hpfs_sb(s)->sb_err == 1) { |
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if (sb_rdonly(s)) |
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pr_cont("; already mounted read-only\n"); |
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else { |
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pr_cont("; remounting read-only\n"); |
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mark_dirty(s, 0); |
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s->s_flags |= SB_RDONLY; |
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} |
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} else if (sb_rdonly(s)) |
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pr_cont("; going on - but anything won't be destroyed because it's read-only\n"); |
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else |
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pr_cont("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n"); |
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} else |
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pr_cont("\n"); |
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hpfs_sb(s)->sb_was_error = 1; |
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} |
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|
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/* |
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* A little trick to detect cycles in many hpfs structures and don't let the |
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* kernel crash on corrupted filesystem. When first called, set c2 to 0. |
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* |
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* BTW. chkdsk doesn't detect cycles correctly. When I had 2 lost directories |
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* nested each in other, chkdsk locked up happilly. |
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*/ |
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int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2, |
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char *msg) |
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{ |
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if (*c2 && *c1 == key) { |
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hpfs_error(s, "cycle detected on key %08x in %s", key, msg); |
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return 1; |
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} |
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(*c2)++; |
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if (!((*c2 - 1) & *c2)) *c1 = key; |
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return 0; |
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} |
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static void free_sbi(struct hpfs_sb_info *sbi) |
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{ |
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kfree(sbi->sb_cp_table); |
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kfree(sbi->sb_bmp_dir); |
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kfree(sbi); |
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} |
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static void lazy_free_sbi(struct rcu_head *rcu) |
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{ |
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free_sbi(container_of(rcu, struct hpfs_sb_info, rcu)); |
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} |
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static void hpfs_put_super(struct super_block *s) |
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{ |
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hpfs_lock(s); |
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unmark_dirty(s); |
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hpfs_unlock(s); |
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call_rcu(&hpfs_sb(s)->rcu, lazy_free_sbi); |
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} |
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static unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno) |
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{ |
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struct quad_buffer_head qbh; |
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unsigned long *bits; |
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unsigned count; |
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bits = hpfs_map_4sectors(s, secno, &qbh, 0); |
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if (!bits) |
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return (unsigned)-1; |
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count = bitmap_weight(bits, 2048 * BITS_PER_BYTE); |
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hpfs_brelse4(&qbh); |
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return count; |
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} |
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static unsigned count_bitmaps(struct super_block *s) |
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{ |
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unsigned n, count, n_bands; |
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n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14; |
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count = 0; |
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for (n = 0; n < COUNT_RD_AHEAD; n++) { |
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hpfs_prefetch_bitmap(s, n); |
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} |
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for (n = 0; n < n_bands; n++) { |
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unsigned c; |
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hpfs_prefetch_bitmap(s, n + COUNT_RD_AHEAD); |
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c = hpfs_count_one_bitmap(s, le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[n])); |
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if (c != (unsigned)-1) |
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count += c; |
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} |
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return count; |
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} |
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unsigned hpfs_get_free_dnodes(struct super_block *s) |
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{ |
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struct hpfs_sb_info *sbi = hpfs_sb(s); |
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if (sbi->sb_n_free_dnodes == (unsigned)-1) { |
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unsigned c = hpfs_count_one_bitmap(s, sbi->sb_dmap); |
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if (c == (unsigned)-1) |
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return 0; |
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sbi->sb_n_free_dnodes = c; |
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} |
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return sbi->sb_n_free_dnodes; |
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} |
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static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
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{ |
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struct super_block *s = dentry->d_sb; |
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struct hpfs_sb_info *sbi = hpfs_sb(s); |
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u64 id = huge_encode_dev(s->s_bdev->bd_dev); |
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hpfs_lock(s); |
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if (sbi->sb_n_free == (unsigned)-1) |
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sbi->sb_n_free = count_bitmaps(s); |
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buf->f_type = s->s_magic; |
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buf->f_bsize = 512; |
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buf->f_blocks = sbi->sb_fs_size; |
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buf->f_bfree = sbi->sb_n_free; |
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buf->f_bavail = sbi->sb_n_free; |
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buf->f_files = sbi->sb_dirband_size / 4; |
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buf->f_ffree = hpfs_get_free_dnodes(s); |
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buf->f_fsid = u64_to_fsid(id); |
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buf->f_namelen = 254; |
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hpfs_unlock(s); |
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return 0; |
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} |
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long hpfs_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
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{ |
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switch (cmd) { |
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case FITRIM: { |
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struct fstrim_range range; |
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secno n_trimmed; |
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int r; |
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if (!capable(CAP_SYS_ADMIN)) |
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return -EPERM; |
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if (copy_from_user(&range, (struct fstrim_range __user *)arg, sizeof(range))) |
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return -EFAULT; |
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r = hpfs_trim_fs(file_inode(file)->i_sb, range.start >> 9, (range.start + range.len) >> 9, (range.minlen + 511) >> 9, &n_trimmed); |
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if (r) |
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return r; |
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range.len = (u64)n_trimmed << 9; |
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if (copy_to_user((struct fstrim_range __user *)arg, &range, sizeof(range))) |
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return -EFAULT; |
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return 0; |
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} |
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default: { |
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return -ENOIOCTLCMD; |
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} |
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} |
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} |
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static struct kmem_cache * hpfs_inode_cachep; |
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static struct inode *hpfs_alloc_inode(struct super_block *sb) |
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{ |
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struct hpfs_inode_info *ei; |
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ei = kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS); |
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if (!ei) |
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return NULL; |
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return &ei->vfs_inode; |
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} |
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static void hpfs_free_inode(struct inode *inode) |
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{ |
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kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode)); |
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} |
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static void init_once(void *foo) |
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{ |
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struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo; |
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inode_init_once(&ei->vfs_inode); |
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} |
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static int init_inodecache(void) |
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{ |
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hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache", |
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sizeof(struct hpfs_inode_info), |
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0, (SLAB_RECLAIM_ACCOUNT| |
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SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
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init_once); |
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if (hpfs_inode_cachep == NULL) |
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return -ENOMEM; |
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return 0; |
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} |
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static void destroy_inodecache(void) |
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{ |
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/* |
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* Make sure all delayed rcu free inodes are flushed before we |
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* destroy cache. |
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*/ |
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rcu_barrier(); |
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kmem_cache_destroy(hpfs_inode_cachep); |
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} |
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/* |
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* A tiny parser for option strings, stolen from dosfs. |
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* Stolen again from read-only hpfs. |
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* And updated for table-driven option parsing. |
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*/ |
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enum { |
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Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis, |
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Opt_check_none, Opt_check_normal, Opt_check_strict, |
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Opt_err_cont, Opt_err_ro, Opt_err_panic, |
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Opt_eas_no, Opt_eas_ro, Opt_eas_rw, |
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Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always, |
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Opt_timeshift, Opt_err, |
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}; |
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static const match_table_t tokens = { |
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{Opt_help, "help"}, |
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{Opt_uid, "uid=%u"}, |
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{Opt_gid, "gid=%u"}, |
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{Opt_umask, "umask=%o"}, |
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{Opt_case_lower, "case=lower"}, |
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{Opt_case_asis, "case=asis"}, |
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{Opt_check_none, "check=none"}, |
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{Opt_check_normal, "check=normal"}, |
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{Opt_check_strict, "check=strict"}, |
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{Opt_err_cont, "errors=continue"}, |
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{Opt_err_ro, "errors=remount-ro"}, |
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{Opt_err_panic, "errors=panic"}, |
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{Opt_eas_no, "eas=no"}, |
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{Opt_eas_ro, "eas=ro"}, |
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{Opt_eas_rw, "eas=rw"}, |
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{Opt_chkdsk_no, "chkdsk=no"}, |
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{Opt_chkdsk_errors, "chkdsk=errors"}, |
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{Opt_chkdsk_always, "chkdsk=always"}, |
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{Opt_timeshift, "timeshift=%d"}, |
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{Opt_err, NULL}, |
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}; |
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static int parse_opts(char *opts, kuid_t *uid, kgid_t *gid, umode_t *umask, |
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int *lowercase, int *eas, int *chk, int *errs, |
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int *chkdsk, int *timeshift) |
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{ |
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char *p; |
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int option; |
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if (!opts) |
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return 1; |
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/*pr_info("Parsing opts: '%s'\n",opts);*/ |
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while ((p = strsep(&opts, ",")) != NULL) { |
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substring_t args[MAX_OPT_ARGS]; |
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int token; |
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if (!*p) |
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continue; |
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token = match_token(p, tokens, args); |
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switch (token) { |
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case Opt_help: |
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return 2; |
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case Opt_uid: |
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if (match_int(args, &option)) |
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return 0; |
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*uid = make_kuid(current_user_ns(), option); |
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if (!uid_valid(*uid)) |
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return 0; |
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break; |
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case Opt_gid: |
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if (match_int(args, &option)) |
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return 0; |
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*gid = make_kgid(current_user_ns(), option); |
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if (!gid_valid(*gid)) |
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return 0; |
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break; |
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case Opt_umask: |
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if (match_octal(args, &option)) |
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return 0; |
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*umask = option; |
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break; |
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case Opt_case_lower: |
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*lowercase = 1; |
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break; |
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case Opt_case_asis: |
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*lowercase = 0; |
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break; |
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case Opt_check_none: |
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*chk = 0; |
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break; |
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case Opt_check_normal: |
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*chk = 1; |
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break; |
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case Opt_check_strict: |
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*chk = 2; |
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break; |
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case Opt_err_cont: |
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*errs = 0; |
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break; |
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case Opt_err_ro: |
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*errs = 1; |
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break; |
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case Opt_err_panic: |
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*errs = 2; |
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break; |
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case Opt_eas_no: |
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*eas = 0; |
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break; |
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case Opt_eas_ro: |
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*eas = 1; |
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break; |
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case Opt_eas_rw: |
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*eas = 2; |
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break; |
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case Opt_chkdsk_no: |
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*chkdsk = 0; |
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break; |
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case Opt_chkdsk_errors: |
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*chkdsk = 1; |
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break; |
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case Opt_chkdsk_always: |
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*chkdsk = 2; |
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break; |
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case Opt_timeshift: |
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{ |
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int m = 1; |
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char *rhs = args[0].from; |
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if (!rhs || !*rhs) |
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return 0; |
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if (*rhs == '-') m = -1; |
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if (*rhs == '+' || *rhs == '-') rhs++; |
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*timeshift = simple_strtoul(rhs, &rhs, 0) * m; |
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if (*rhs) |
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return 0; |
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break; |
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} |
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default: |
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return 0; |
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} |
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} |
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return 1; |
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} |
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static inline void hpfs_help(void) |
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{ |
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pr_info("\n\ |
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HPFS filesystem options:\n\ |
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help do not mount and display this text\n\ |
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uid=xxx set uid of files that don't have uid specified in eas\n\ |
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gid=xxx set gid of files that don't have gid specified in eas\n\ |
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umask=xxx set mode of files that don't have mode specified in eas\n\ |
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case=lower lowercase all files\n\ |
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case=asis do not lowercase files (default)\n\ |
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check=none no fs checks - kernel may crash on corrupted filesystem\n\ |
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check=normal do some checks - it should not crash (default)\n\ |
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check=strict do extra time-consuming checks, used for debugging\n\ |
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errors=continue continue on errors\n\ |
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errors=remount-ro remount read-only if errors found (default)\n\ |
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errors=panic panic on errors\n\ |
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chkdsk=no do not mark fs for chkdsking even if there were errors\n\ |
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chkdsk=errors mark fs dirty if errors found (default)\n\ |
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chkdsk=always always mark fs dirty - used for debugging\n\ |
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eas=no ignore extended attributes\n\ |
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eas=ro read but do not write extended attributes\n\ |
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eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\ |
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timeshift=nnn add nnn seconds to file times\n\ |
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\n"); |
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} |
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static int hpfs_remount_fs(struct super_block *s, int *flags, char *data) |
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{ |
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kuid_t uid; |
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kgid_t gid; |
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umode_t umask; |
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int lowercase, eas, chk, errs, chkdsk, timeshift; |
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int o; |
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struct hpfs_sb_info *sbi = hpfs_sb(s); |
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|
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sync_filesystem(s); |
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|
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*flags |= SB_NOATIME; |
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|
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hpfs_lock(s); |
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uid = sbi->sb_uid; gid = sbi->sb_gid; |
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umask = 0777 & ~sbi->sb_mode; |
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lowercase = sbi->sb_lowercase; |
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eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk; |
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errs = sbi->sb_err; timeshift = sbi->sb_timeshift; |
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|
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if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, |
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&eas, &chk, &errs, &chkdsk, ×hift))) { |
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pr_err("bad mount options.\n"); |
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goto out_err; |
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} |
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if (o == 2) { |
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hpfs_help(); |
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goto out_err; |
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} |
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if (timeshift != sbi->sb_timeshift) { |
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pr_err("timeshift can't be changed using remount.\n"); |
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goto out_err; |
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} |
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unmark_dirty(s); |
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sbi->sb_uid = uid; sbi->sb_gid = gid; |
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sbi->sb_mode = 0777 & ~umask; |
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sbi->sb_lowercase = lowercase; |
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sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk; |
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sbi->sb_err = errs; sbi->sb_timeshift = timeshift; |
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|
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if (!(*flags & SB_RDONLY)) mark_dirty(s, 1); |
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|
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hpfs_unlock(s); |
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return 0; |
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|
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out_err: |
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hpfs_unlock(s); |
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return -EINVAL; |
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} |
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|
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static int hpfs_show_options(struct seq_file *seq, struct dentry *root) |
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{ |
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struct hpfs_sb_info *sbi = hpfs_sb(root->d_sb); |
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|
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seq_printf(seq, ",uid=%u", from_kuid_munged(&init_user_ns, sbi->sb_uid)); |
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seq_printf(seq, ",gid=%u", from_kgid_munged(&init_user_ns, sbi->sb_gid)); |
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seq_printf(seq, ",umask=%03o", (~sbi->sb_mode & 0777)); |
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if (sbi->sb_lowercase) |
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seq_printf(seq, ",case=lower"); |
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if (!sbi->sb_chk) |
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seq_printf(seq, ",check=none"); |
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if (sbi->sb_chk == 2) |
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seq_printf(seq, ",check=strict"); |
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if (!sbi->sb_err) |
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seq_printf(seq, ",errors=continue"); |
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if (sbi->sb_err == 2) |
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seq_printf(seq, ",errors=panic"); |
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if (!sbi->sb_chkdsk) |
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seq_printf(seq, ",chkdsk=no"); |
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if (sbi->sb_chkdsk == 2) |
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seq_printf(seq, ",chkdsk=always"); |
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if (!sbi->sb_eas) |
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seq_printf(seq, ",eas=no"); |
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if (sbi->sb_eas == 1) |
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seq_printf(seq, ",eas=ro"); |
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if (sbi->sb_timeshift) |
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seq_printf(seq, ",timeshift=%d", sbi->sb_timeshift); |
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return 0; |
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} |
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|
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/* Super operations */ |
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|
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static const struct super_operations hpfs_sops = |
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{ |
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.alloc_inode = hpfs_alloc_inode, |
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.free_inode = hpfs_free_inode, |
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.evict_inode = hpfs_evict_inode, |
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.put_super = hpfs_put_super, |
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.statfs = hpfs_statfs, |
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.remount_fs = hpfs_remount_fs, |
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.show_options = hpfs_show_options, |
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}; |
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|
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static int hpfs_fill_super(struct super_block *s, void *options, int silent) |
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{ |
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struct buffer_head *bh0, *bh1, *bh2; |
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struct hpfs_boot_block *bootblock; |
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struct hpfs_super_block *superblock; |
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struct hpfs_spare_block *spareblock; |
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struct hpfs_sb_info *sbi; |
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struct inode *root; |
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|
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kuid_t uid; |
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kgid_t gid; |
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umode_t umask; |
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int lowercase, eas, chk, errs, chkdsk, timeshift; |
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|
|
dnode_secno root_dno; |
|
struct hpfs_dirent *de = NULL; |
|
struct quad_buffer_head qbh; |
|
|
|
int o; |
|
|
|
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
|
if (!sbi) { |
|
return -ENOMEM; |
|
} |
|
s->s_fs_info = sbi; |
|
|
|
mutex_init(&sbi->hpfs_mutex); |
|
hpfs_lock(s); |
|
|
|
uid = current_uid(); |
|
gid = current_gid(); |
|
umask = current_umask(); |
|
lowercase = 0; |
|
eas = 2; |
|
chk = 1; |
|
errs = 1; |
|
chkdsk = 1; |
|
timeshift = 0; |
|
|
|
if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, |
|
&eas, &chk, &errs, &chkdsk, ×hift))) { |
|
pr_err("bad mount options.\n"); |
|
goto bail0; |
|
} |
|
if (o==2) { |
|
hpfs_help(); |
|
goto bail0; |
|
} |
|
|
|
/*sbi->sb_mounting = 1;*/ |
|
sb_set_blocksize(s, 512); |
|
sbi->sb_fs_size = -1; |
|
if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1; |
|
if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2; |
|
if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3; |
|
|
|
/* Check magics */ |
|
if (/*le16_to_cpu(bootblock->magic) != BB_MAGIC |
|
||*/ le32_to_cpu(superblock->magic) != SB_MAGIC |
|
|| le32_to_cpu(spareblock->magic) != SP_MAGIC) { |
|
if (!silent) |
|
pr_err("Bad magic ... probably not HPFS\n"); |
|
goto bail4; |
|
} |
|
|
|
/* Check version */ |
|
if (!sb_rdonly(s) && superblock->funcversion != 2 && superblock->funcversion != 3) { |
|
pr_err("Bad version %d,%d. Mount readonly to go around\n", |
|
(int)superblock->version, (int)superblock->funcversion); |
|
pr_err("please try recent version of HPFS driver at http://artax.karlin.mff.cuni.cz/~mikulas/vyplody/hpfs/index-e.cgi and if it still can't understand this format, contact author - [email protected]\n"); |
|
goto bail4; |
|
} |
|
|
|
s->s_flags |= SB_NOATIME; |
|
|
|
/* Fill superblock stuff */ |
|
s->s_magic = HPFS_SUPER_MAGIC; |
|
s->s_op = &hpfs_sops; |
|
s->s_d_op = &hpfs_dentry_operations; |
|
s->s_time_min = local_to_gmt(s, 0); |
|
s->s_time_max = local_to_gmt(s, U32_MAX); |
|
|
|
sbi->sb_root = le32_to_cpu(superblock->root); |
|
sbi->sb_fs_size = le32_to_cpu(superblock->n_sectors); |
|
sbi->sb_bitmaps = le32_to_cpu(superblock->bitmaps); |
|
sbi->sb_dirband_start = le32_to_cpu(superblock->dir_band_start); |
|
sbi->sb_dirband_size = le32_to_cpu(superblock->n_dir_band); |
|
sbi->sb_dmap = le32_to_cpu(superblock->dir_band_bitmap); |
|
sbi->sb_uid = uid; |
|
sbi->sb_gid = gid; |
|
sbi->sb_mode = 0777 & ~umask; |
|
sbi->sb_n_free = -1; |
|
sbi->sb_n_free_dnodes = -1; |
|
sbi->sb_lowercase = lowercase; |
|
sbi->sb_eas = eas; |
|
sbi->sb_chk = chk; |
|
sbi->sb_chkdsk = chkdsk; |
|
sbi->sb_err = errs; |
|
sbi->sb_timeshift = timeshift; |
|
sbi->sb_was_error = 0; |
|
sbi->sb_cp_table = NULL; |
|
sbi->sb_c_bitmap = -1; |
|
sbi->sb_max_fwd_alloc = 0xffffff; |
|
|
|
if (sbi->sb_fs_size >= 0x80000000) { |
|
hpfs_error(s, "invalid size in superblock: %08x", |
|
(unsigned)sbi->sb_fs_size); |
|
goto bail4; |
|
} |
|
|
|
if (spareblock->n_spares_used) |
|
hpfs_load_hotfix_map(s, spareblock); |
|
|
|
/* Load bitmap directory */ |
|
if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, le32_to_cpu(superblock->bitmaps)))) |
|
goto bail4; |
|
|
|
/* Check for general fs errors*/ |
|
if (spareblock->dirty && !spareblock->old_wrote) { |
|
if (errs == 2) { |
|
pr_err("Improperly stopped, not mounted\n"); |
|
goto bail4; |
|
} |
|
hpfs_error(s, "improperly stopped"); |
|
} |
|
|
|
if (!sb_rdonly(s)) { |
|
spareblock->dirty = 1; |
|
spareblock->old_wrote = 0; |
|
mark_buffer_dirty(bh2); |
|
} |
|
|
|
if (le32_to_cpu(spareblock->n_dnode_spares) != le32_to_cpu(spareblock->n_dnode_spares_free)) { |
|
if (errs >= 2) { |
|
pr_err("Spare dnodes used, try chkdsk\n"); |
|
mark_dirty(s, 0); |
|
goto bail4; |
|
} |
|
hpfs_error(s, "warning: spare dnodes used, try chkdsk"); |
|
if (errs == 0) |
|
pr_err("Proceeding, but your filesystem could be corrupted if you delete files or directories\n"); |
|
} |
|
if (chk) { |
|
unsigned a; |
|
if (le32_to_cpu(superblock->dir_band_end) - le32_to_cpu(superblock->dir_band_start) + 1 != le32_to_cpu(superblock->n_dir_band) || |
|
le32_to_cpu(superblock->dir_band_end) < le32_to_cpu(superblock->dir_band_start) || le32_to_cpu(superblock->n_dir_band) > 0x4000) { |
|
hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x", |
|
le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->dir_band_end), le32_to_cpu(superblock->n_dir_band)); |
|
goto bail4; |
|
} |
|
a = sbi->sb_dirband_size; |
|
sbi->sb_dirband_size = 0; |
|
if (hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->n_dir_band), "dir_band") || |
|
hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_bitmap), 4, "dir_band_bitmap") || |
|
hpfs_chk_sectors(s, le32_to_cpu(superblock->bitmaps), 4, "bitmaps")) { |
|
mark_dirty(s, 0); |
|
goto bail4; |
|
} |
|
sbi->sb_dirband_size = a; |
|
} else |
|
pr_err("You really don't want any checks? You are crazy...\n"); |
|
|
|
/* Load code page table */ |
|
if (le32_to_cpu(spareblock->n_code_pages)) |
|
if (!(sbi->sb_cp_table = hpfs_load_code_page(s, le32_to_cpu(spareblock->code_page_dir)))) |
|
pr_err("code page support is disabled\n"); |
|
|
|
brelse(bh2); |
|
brelse(bh1); |
|
brelse(bh0); |
|
|
|
root = iget_locked(s, sbi->sb_root); |
|
if (!root) |
|
goto bail0; |
|
hpfs_init_inode(root); |
|
hpfs_read_inode(root); |
|
unlock_new_inode(root); |
|
s->s_root = d_make_root(root); |
|
if (!s->s_root) |
|
goto bail0; |
|
|
|
/* |
|
* find the root directory's . pointer & finish filling in the inode |
|
*/ |
|
|
|
root_dno = hpfs_fnode_dno(s, sbi->sb_root); |
|
if (root_dno) |
|
de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh); |
|
if (!de) |
|
hpfs_error(s, "unable to find root dir"); |
|
else { |
|
root->i_atime.tv_sec = local_to_gmt(s, le32_to_cpu(de->read_date)); |
|
root->i_atime.tv_nsec = 0; |
|
root->i_mtime.tv_sec = local_to_gmt(s, le32_to_cpu(de->write_date)); |
|
root->i_mtime.tv_nsec = 0; |
|
root->i_ctime.tv_sec = local_to_gmt(s, le32_to_cpu(de->creation_date)); |
|
root->i_ctime.tv_nsec = 0; |
|
hpfs_i(root)->i_ea_size = le32_to_cpu(de->ea_size); |
|
hpfs_i(root)->i_parent_dir = root->i_ino; |
|
if (root->i_size == -1) |
|
root->i_size = 2048; |
|
if (root->i_blocks == -1) |
|
root->i_blocks = 5; |
|
hpfs_brelse4(&qbh); |
|
} |
|
hpfs_unlock(s); |
|
return 0; |
|
|
|
bail4: brelse(bh2); |
|
bail3: brelse(bh1); |
|
bail2: brelse(bh0); |
|
bail1: |
|
bail0: |
|
hpfs_unlock(s); |
|
free_sbi(sbi); |
|
return -EINVAL; |
|
} |
|
|
|
static struct dentry *hpfs_mount(struct file_system_type *fs_type, |
|
int flags, const char *dev_name, void *data) |
|
{ |
|
return mount_bdev(fs_type, flags, dev_name, data, hpfs_fill_super); |
|
} |
|
|
|
static struct file_system_type hpfs_fs_type = { |
|
.owner = THIS_MODULE, |
|
.name = "hpfs", |
|
.mount = hpfs_mount, |
|
.kill_sb = kill_block_super, |
|
.fs_flags = FS_REQUIRES_DEV, |
|
}; |
|
MODULE_ALIAS_FS("hpfs"); |
|
|
|
static int __init init_hpfs_fs(void) |
|
{ |
|
int err = init_inodecache(); |
|
if (err) |
|
goto out1; |
|
err = register_filesystem(&hpfs_fs_type); |
|
if (err) |
|
goto out; |
|
return 0; |
|
out: |
|
destroy_inodecache(); |
|
out1: |
|
return err; |
|
} |
|
|
|
static void __exit exit_hpfs_fs(void) |
|
{ |
|
unregister_filesystem(&hpfs_fs_type); |
|
destroy_inodecache(); |
|
} |
|
|
|
module_init(init_hpfs_fs) |
|
module_exit(exit_hpfs_fs) |
|
MODULE_LICENSE("GPL");
|
|
|