NTFS: Implement support for sector sizes above 512 bytes (up to the maximum
supported by NTFS which is 4096 bytes).
This commit is contained in:
parent
7b875affd4
commit
78af34f03d
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@ -21,8 +21,14 @@ ToDo/Notes:
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2.1.26 - Minor bug fixes and updates.
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- Fix a potential overflow in file.c where a cast to s64 was missing in
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a left shift of a page index.
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- The struct inode has had its i_sem semaphore changed to a mutex named
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i_mutex.
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- We have struct kmem_cache now so use it instead of the typedef
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kmem_cache_t. (Pekka Enberg)
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- Implement support for sector sizes above 512 bytes (up to the maximum
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supported by NTFS which is 4096 bytes).
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- Miscellaneous updates to layout.h.
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- Cope with attribute list attribute having invalid flags. Windows
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copes with this and even chkdsk does not detect or fix this so we
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@ -2,7 +2,7 @@
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* aops.c - NTFS kernel address space operations and page cache handling.
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* Part of the Linux-NTFS project.
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*
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* Copyright (c) 2001-2005 Anton Altaparmakov
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* Copyright (c) 2001-2006 Anton Altaparmakov
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* Copyright (c) 2002 Richard Russon
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*
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* This program/include file is free software; you can redistribute it and/or
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@ -200,8 +200,8 @@ static int ntfs_read_block(struct page *page)
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/* $MFT/$DATA must have its complete runlist in memory at all times. */
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BUG_ON(!ni->runlist.rl && !ni->mft_no && !NInoAttr(ni));
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blocksize_bits = VFS_I(ni)->i_blkbits;
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blocksize = 1 << blocksize_bits;
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blocksize = vol->sb->s_blocksize;
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blocksize_bits = vol->sb->s_blocksize_bits;
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if (!page_has_buffers(page)) {
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create_empty_buffers(page, blocksize, 0);
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@ -569,10 +569,8 @@ static int ntfs_write_block(struct page *page, struct writeback_control *wbc)
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BUG_ON(!NInoNonResident(ni));
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BUG_ON(NInoMstProtected(ni));
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blocksize_bits = vi->i_blkbits;
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blocksize = 1 << blocksize_bits;
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blocksize = vol->sb->s_blocksize;
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blocksize_bits = vol->sb->s_blocksize_bits;
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if (!page_has_buffers(page)) {
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BUG_ON(!PageUptodate(page));
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create_empty_buffers(page, blocksize,
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@ -949,8 +947,8 @@ static int ntfs_write_mst_block(struct page *page,
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*/
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BUG_ON(!(is_mft || S_ISDIR(vi->i_mode) ||
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(NInoAttr(ni) && ni->type == AT_INDEX_ALLOCATION)));
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bh_size_bits = vi->i_blkbits;
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bh_size = 1 << bh_size_bits;
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bh_size = vol->sb->s_blocksize;
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bh_size_bits = vol->sb->s_blocksize_bits;
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max_bhs = PAGE_CACHE_SIZE / bh_size;
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BUG_ON(!max_bhs);
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BUG_ON(max_bhs > MAX_BUF_PER_PAGE);
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@ -1596,7 +1594,7 @@ void mark_ntfs_record_dirty(struct page *page, const unsigned int ofs) {
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BUG_ON(!PageUptodate(page));
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end = ofs + ni->itype.index.block_size;
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bh_size = 1 << VFS_I(ni)->i_blkbits;
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bh_size = VFS_I(ni)->i_sb->s_blocksize;
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spin_lock(&mapping->private_lock);
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if (unlikely(!page_has_buffers(page))) {
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spin_unlock(&mapping->private_lock);
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@ -1,7 +1,7 @@
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/*
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* file.c - NTFS kernel file operations. Part of the Linux-NTFS project.
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*
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* Copyright (c) 2001-2005 Anton Altaparmakov
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* Copyright (c) 2001-2006 Anton Altaparmakov
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*
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* This program/include file is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as published
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@ -529,8 +529,8 @@ static int ntfs_prepare_pages_for_non_resident_write(struct page **pages,
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"index 0x%lx, nr_pages 0x%x, pos 0x%llx, bytes 0x%zx.",
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vi->i_ino, ni->type, pages[0]->index, nr_pages,
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(long long)pos, bytes);
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blocksize_bits = vi->i_blkbits;
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blocksize = 1 << blocksize_bits;
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blocksize = vol->sb->s_blocksize;
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blocksize_bits = vol->sb->s_blocksize_bits;
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u = 0;
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do {
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struct page *page = pages[u];
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@ -1525,7 +1525,7 @@ static inline int ntfs_commit_pages_after_non_resident_write(
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vi = pages[0]->mapping->host;
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ni = NTFS_I(vi);
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blocksize = 1 << vi->i_blkbits;
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blocksize = vi->i_sb->s_blocksize;
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end = pos + bytes;
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u = 0;
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do {
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@ -1,7 +1,7 @@
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/**
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* mft.c - NTFS kernel mft record operations. Part of the Linux-NTFS project.
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*
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* Copyright (c) 2001-2005 Anton Altaparmakov
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* Copyright (c) 2001-2006 Anton Altaparmakov
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* Copyright (c) 2002 Richard Russon
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*
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* This program/include file is free software; you can redistribute it and/or
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@ -473,7 +473,7 @@ int ntfs_sync_mft_mirror(ntfs_volume *vol, const unsigned long mft_no,
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runlist_element *rl;
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unsigned int block_start, block_end, m_start, m_end, page_ofs;
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int i_bhs, nr_bhs, err = 0;
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unsigned char blocksize_bits = vol->mftmirr_ino->i_blkbits;
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unsigned char blocksize_bits = vol->sb->s_blocksize_bits;
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ntfs_debug("Entering for inode 0x%lx.", mft_no);
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BUG_ON(!max_bhs);
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@ -672,8 +672,8 @@ int write_mft_record_nolock(ntfs_inode *ni, MFT_RECORD *m, int sync)
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{
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ntfs_volume *vol = ni->vol;
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struct page *page = ni->page;
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unsigned char blocksize_bits = vol->mft_ino->i_blkbits;
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unsigned int blocksize = 1 << blocksize_bits;
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unsigned int blocksize = vol->sb->s_blocksize;
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unsigned char blocksize_bits = vol->sb->s_blocksize_bits;
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int max_bhs = vol->mft_record_size / blocksize;
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struct buffer_head *bhs[max_bhs];
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struct buffer_head *bh, *head;
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151
fs/ntfs/super.c
151
fs/ntfs/super.c
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@ -1,7 +1,7 @@
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/*
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* super.c - NTFS kernel super block handling. Part of the Linux-NTFS project.
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*
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* Copyright (c) 2001-2005 Anton Altaparmakov
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* Copyright (c) 2001-2006 Anton Altaparmakov
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* Copyright (c) 2001,2002 Richard Russon
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*
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* This program/include file is free software; you can redistribute it and/or
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@ -22,6 +22,7 @@
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#include <linux/stddef.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/spinlock.h>
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#include <linux/blkdev.h> /* For bdev_hardsect_size(). */
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@ -641,7 +642,7 @@ static struct buffer_head *read_ntfs_boot_sector(struct super_block *sb,
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{
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const char *read_err_str = "Unable to read %s boot sector.";
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struct buffer_head *bh_primary, *bh_backup;
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long nr_blocks = NTFS_SB(sb)->nr_blocks;
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sector_t nr_blocks = NTFS_SB(sb)->nr_blocks;
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/* Try to read primary boot sector. */
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if ((bh_primary = sb_bread(sb, 0))) {
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@ -688,13 +689,18 @@ hotfix_primary_boot_sector:
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/*
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* If we managed to read sector zero and the volume is not
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* read-only, copy the found, valid backup boot sector to the
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* primary boot sector.
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* primary boot sector. Note we only copy the actual boot
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* sector structure, not the actual whole device sector as that
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* may be bigger and would potentially damage the $Boot system
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* file (FIXME: Would be nice to know if the backup boot sector
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* on a large sector device contains the whole boot loader or
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* just the first 512 bytes).
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*/
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if (!(sb->s_flags & MS_RDONLY)) {
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ntfs_warning(sb, "Hot-fix: Recovering invalid primary "
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"boot sector from backup copy.");
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memcpy(bh_primary->b_data, bh_backup->b_data,
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sb->s_blocksize);
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NTFS_BLOCK_SIZE);
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mark_buffer_dirty(bh_primary);
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sync_dirty_buffer(bh_primary);
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if (buffer_uptodate(bh_primary)) {
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@ -733,9 +739,13 @@ static BOOL parse_ntfs_boot_sector(ntfs_volume *vol, const NTFS_BOOT_SECTOR *b)
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vol->sector_size);
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ntfs_debug("vol->sector_size_bits = %i (0x%x)", vol->sector_size_bits,
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vol->sector_size_bits);
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if (vol->sector_size != vol->sb->s_blocksize)
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ntfs_warning(vol->sb, "The boot sector indicates a sector size "
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"different from the device sector size.");
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if (vol->sector_size < vol->sb->s_blocksize) {
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ntfs_error(vol->sb, "Sector size (%i) is smaller than the "
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"device block size (%lu). This is not "
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"supported. Sorry.", vol->sector_size,
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vol->sb->s_blocksize);
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return FALSE;
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}
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ntfs_debug("sectors_per_cluster = 0x%x", b->bpb.sectors_per_cluster);
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sectors_per_cluster_bits = ffs(b->bpb.sectors_per_cluster) - 1;
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ntfs_debug("sectors_per_cluster_bits = 0x%x",
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@ -748,16 +758,11 @@ static BOOL parse_ntfs_boot_sector(ntfs_volume *vol, const NTFS_BOOT_SECTOR *b)
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ntfs_debug("vol->cluster_size = %i (0x%x)", vol->cluster_size,
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vol->cluster_size);
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ntfs_debug("vol->cluster_size_mask = 0x%x", vol->cluster_size_mask);
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ntfs_debug("vol->cluster_size_bits = %i (0x%x)",
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vol->cluster_size_bits, vol->cluster_size_bits);
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if (vol->sector_size > vol->cluster_size) {
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ntfs_error(vol->sb, "Sector sizes above the cluster size are "
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"not supported. Sorry.");
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return FALSE;
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}
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if (vol->sb->s_blocksize > vol->cluster_size) {
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ntfs_error(vol->sb, "Cluster sizes smaller than the device "
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"sector size are not supported. Sorry.");
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ntfs_debug("vol->cluster_size_bits = %i", vol->cluster_size_bits);
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if (vol->cluster_size < vol->sector_size) {
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ntfs_error(vol->sb, "Cluster size (%i) is smaller than the "
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"sector size (%i). This is not supported. "
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"Sorry.", vol->cluster_size, vol->sector_size);
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return FALSE;
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}
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clusters_per_mft_record = b->clusters_per_mft_record;
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@ -786,11 +791,18 @@ static BOOL parse_ntfs_boot_sector(ntfs_volume *vol, const NTFS_BOOT_SECTOR *b)
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* we store $MFT/$DATA, the table of mft records in the page cache.
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*/
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if (vol->mft_record_size > PAGE_CACHE_SIZE) {
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ntfs_error(vol->sb, "Mft record size %i (0x%x) exceeds the "
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"page cache size on your system %lu (0x%lx). "
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ntfs_error(vol->sb, "Mft record size (%i) exceeds the "
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"PAGE_CACHE_SIZE on your system (%lu). "
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"This is not supported. Sorry.",
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vol->mft_record_size, vol->mft_record_size,
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PAGE_CACHE_SIZE, PAGE_CACHE_SIZE);
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vol->mft_record_size, PAGE_CACHE_SIZE);
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return FALSE;
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}
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/* We cannot support mft record sizes below the sector size. */
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if (vol->mft_record_size < vol->sector_size) {
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ntfs_error(vol->sb, "Mft record size (%i) is smaller than the "
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"sector size (%i). This is not supported. "
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"Sorry.", vol->mft_record_size,
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vol->sector_size);
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return FALSE;
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}
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clusters_per_index_record = b->clusters_per_index_record;
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@ -816,6 +828,14 @@ static BOOL parse_ntfs_boot_sector(ntfs_volume *vol, const NTFS_BOOT_SECTOR *b)
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ntfs_debug("vol->index_record_size_bits = %i (0x%x)",
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vol->index_record_size_bits,
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vol->index_record_size_bits);
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/* We cannot support index record sizes below the sector size. */
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if (vol->index_record_size < vol->sector_size) {
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ntfs_error(vol->sb, "Index record size (%i) is smaller than "
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"the sector size (%i). This is not "
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"supported. Sorry.", vol->index_record_size,
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vol->sector_size);
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return FALSE;
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}
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/*
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* Get the size of the volume in clusters and check for 64-bit-ness.
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* Windows currently only uses 32 bits to save the clusters so we do
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@ -845,15 +865,18 @@ static BOOL parse_ntfs_boot_sector(ntfs_volume *vol, const NTFS_BOOT_SECTOR *b)
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}
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ll = sle64_to_cpu(b->mft_lcn);
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if (ll >= vol->nr_clusters) {
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ntfs_error(vol->sb, "MFT LCN is beyond end of volume. Weird.");
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ntfs_error(vol->sb, "MFT LCN (%lli, 0x%llx) is beyond end of "
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"volume. Weird.", (unsigned long long)ll,
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(unsigned long long)ll);
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return FALSE;
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}
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vol->mft_lcn = ll;
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ntfs_debug("vol->mft_lcn = 0x%llx", (long long)vol->mft_lcn);
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ll = sle64_to_cpu(b->mftmirr_lcn);
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if (ll >= vol->nr_clusters) {
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ntfs_error(vol->sb, "MFTMirr LCN is beyond end of volume. "
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"Weird.");
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ntfs_error(vol->sb, "MFTMirr LCN (%lli, 0x%llx) is beyond end "
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"of volume. Weird.", (unsigned long long)ll,
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(unsigned long long)ll);
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return FALSE;
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}
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vol->mftmirr_lcn = ll;
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@ -2685,7 +2708,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
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ntfs_volume *vol;
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struct buffer_head *bh;
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struct inode *tmp_ino;
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int result;
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int blocksize, result;
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ntfs_debug("Entering.");
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#ifndef NTFS_RW
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@ -2724,60 +2747,85 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
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if (!parse_options(vol, (char*)opt))
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goto err_out_now;
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/* We support sector sizes up to the PAGE_CACHE_SIZE. */
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if (bdev_hardsect_size(sb->s_bdev) > PAGE_CACHE_SIZE) {
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if (!silent)
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ntfs_error(sb, "Device has unsupported sector size "
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"(%i). The maximum supported sector "
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"size on this architecture is %lu "
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"bytes.",
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bdev_hardsect_size(sb->s_bdev),
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PAGE_CACHE_SIZE);
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goto err_out_now;
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}
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/*
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* TODO: Fail safety check. In the future we should really be able to
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* cope with this being the case, but for now just bail out.
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* Setup the device access block size to NTFS_BLOCK_SIZE or the hard
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* sector size, whichever is bigger.
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*/
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if (bdev_hardsect_size(sb->s_bdev) > NTFS_BLOCK_SIZE) {
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blocksize = sb_min_blocksize(sb, NTFS_BLOCK_SIZE);
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if (blocksize < NTFS_BLOCK_SIZE) {
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if (!silent)
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ntfs_error(sb, "Device has unsupported hardsect_size.");
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ntfs_error(sb, "Unable to set device block size.");
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goto err_out_now;
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}
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/* Setup the device access block size to NTFS_BLOCK_SIZE. */
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if (sb_set_blocksize(sb, NTFS_BLOCK_SIZE) != NTFS_BLOCK_SIZE) {
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BUG_ON(blocksize != sb->s_blocksize);
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ntfs_debug("Set device block size to %i bytes (block size bits %i).",
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blocksize, sb->s_blocksize_bits);
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/* Determine the size of the device in units of block_size bytes. */
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if (!i_size_read(sb->s_bdev->bd_inode)) {
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if (!silent)
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ntfs_error(sb, "Unable to set block size.");
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ntfs_error(sb, "Unable to determine device size.");
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goto err_out_now;
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}
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/* Get the size of the device in units of NTFS_BLOCK_SIZE bytes. */
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vol->nr_blocks = i_size_read(sb->s_bdev->bd_inode) >>
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NTFS_BLOCK_SIZE_BITS;
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sb->s_blocksize_bits;
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/* Read the boot sector and return unlocked buffer head to it. */
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if (!(bh = read_ntfs_boot_sector(sb, silent))) {
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if (!silent)
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ntfs_error(sb, "Not an NTFS volume.");
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goto err_out_now;
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}
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/*
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* Extract the data from the boot sector and setup the ntfs super block
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* Extract the data from the boot sector and setup the ntfs volume
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* using it.
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*/
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result = parse_ntfs_boot_sector(vol, (NTFS_BOOT_SECTOR*)bh->b_data);
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/* Initialize the cluster and mft allocators. */
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ntfs_setup_allocators(vol);
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brelse(bh);
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if (!result) {
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if (!silent)
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ntfs_error(sb, "Unsupported NTFS filesystem.");
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goto err_out_now;
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}
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/*
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* TODO: When we start coping with sector sizes different from
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* NTFS_BLOCK_SIZE, we now probably need to set the blocksize of the
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* device (probably to NTFS_BLOCK_SIZE).
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* If the boot sector indicates a sector size bigger than the current
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* device block size, switch the device block size to the sector size.
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* TODO: It may be possible to support this case even when the set
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* below fails, we would just be breaking up the i/o for each sector
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* into multiple blocks for i/o purposes but otherwise it should just
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* work. However it is safer to leave disabled until someone hits this
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* error message and then we can get them to try it without the setting
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* so we know for sure that it works.
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*/
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if (vol->sector_size > blocksize) {
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blocksize = sb_set_blocksize(sb, vol->sector_size);
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if (blocksize != vol->sector_size) {
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if (!silent)
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ntfs_error(sb, "Unable to set device block "
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"size to sector size (%i).",
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vol->sector_size);
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goto err_out_now;
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}
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BUG_ON(blocksize != sb->s_blocksize);
|
||||
vol->nr_blocks = i_size_read(sb->s_bdev->bd_inode) >>
|
||||
sb->s_blocksize_bits;
|
||||
ntfs_debug("Changed device block size to %i bytes (block size "
|
||||
"bits %i) to match volume sector size.",
|
||||
blocksize, sb->s_blocksize_bits);
|
||||
}
|
||||
/* Initialize the cluster and mft allocators. */
|
||||
ntfs_setup_allocators(vol);
|
||||
/* Setup remaining fields in the super block. */
|
||||
sb->s_magic = NTFS_SB_MAGIC;
|
||||
|
||||
/*
|
||||
* Ntfs allows 63 bits for the file size, i.e. correct would be:
|
||||
* sb->s_maxbytes = ~0ULL >> 1;
|
||||
|
@ -2787,9 +2835,8 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
|
|||
* without overflowing the index or to 2^63 - 1, whichever is smaller.
|
||||
*/
|
||||
sb->s_maxbytes = MAX_LFS_FILESIZE;
|
||||
|
||||
/* Ntfs measures time in 100ns intervals. */
|
||||
sb->s_time_gran = 100;
|
||||
|
||||
/*
|
||||
* Now load the metadata required for the page cache and our address
|
||||
* space operations to function. We do this by setting up a specialised
|
||||
|
|
Loading…
Reference in a new issue