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Merge git://git.kernel.org/pub/scm/linux/kernel/git/aia21/ntfs

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Pull NTFS update from Anton Altaparmakov:
 "Here is a small NTFS update notably implementing FIBMAP ioctl for NTFS
  by adding the bmap address space operation.  People seem to still want
  FIBMAP"

* git://git.kernel.org/pub/scm/linux/kernel/git/aia21/ntfs:
  NTFS: Bump version to 2.1.31.
  NTFS: Add bmap address space operation needed for FIBMAP ioctl.
  NTFS: Remove changelog from Documentation/filesystems/ntfs.txt.
  NTFS: Split ntfs_aops into ntfs_normal_aops and ntfs_compressed_aops in preparation for them diverging.
This commit is contained in:
Linus Torvalds
2014-10-18 12:54:46 -07:00
parent ead13aee23 3569b70c40
commit 4869447d21
5 changed files with 167 additions and 293 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
fs/ntfs/Makefile
View File

@@ -8,7 +8,7 @@ ntfs-y := aops.o attrib.o collate.o compress.o debug.o dir.o file.o \
ntfs-$(CONFIG_NTFS_RW) += bitmap.o lcnalloc.o logfile.o quota.o usnjrnl.o
ccflags-y := -DNTFS_VERSION=\"2.1.30\"
ccflags-y := -DNTFS_VERSION=\"2.1.31\"
ccflags-$(CONFIG_NTFS_DEBUG) += -DDEBUG
ccflags-$(CONFIG_NTFS_RW) += -DNTFS_RW

163
fs/ntfs/aops.c
View File

@@ -1,8 +1,7 @@
/**
* aops.c - NTFS kernel address space operations and page cache handling.
* Part of the Linux-NTFS project.
*
* Copyright (c) 2001-2007 Anton Altaparmakov
* Copyright (c) 2001-2014 Anton Altaparmakov and Tuxera Inc.
* Copyright (c) 2002 Richard Russon
*
* This program/include file is free software; you can redistribute it and/or
@@ -1539,16 +1538,157 @@ err_out:
#endif /* NTFS_RW */
/**
* ntfs_aops - general address space operations for inodes and attributes
* ntfs_bmap - map logical file block to physical device block
* @mapping: address space mapping to which the block to be mapped belongs
* @block: logical block to map to its physical device block
*
* For regular, non-resident files (i.e. not compressed and not encrypted), map
* the logical @block belonging to the file described by the address space
* mapping @mapping to its physical device block.
*
* The size of the block is equal to the @s_blocksize field of the super block
* of the mounted file system which is guaranteed to be smaller than or equal
* to the cluster size thus the block is guaranteed to fit entirely inside the
* cluster which means we do not need to care how many contiguous bytes are
* available after the beginning of the block.
*
* Return the physical device block if the mapping succeeded or 0 if the block
* is sparse or there was an error.
*
* Note: This is a problem if someone tries to run bmap() on $Boot system file
* as that really is in block zero but there is nothing we can do. bmap() is
* just broken in that respect (just like it cannot distinguish sparse from
* not available or error).
*/
const struct address_space_operations ntfs_aops = {
.readpage = ntfs_readpage, /* Fill page with data. */
static sector_t ntfs_bmap(struct address_space *mapping, sector_t block)
{
s64 ofs, size;
loff_t i_size;
LCN lcn;
unsigned long blocksize, flags;
ntfs_inode *ni = NTFS_I(mapping->host);
ntfs_volume *vol = ni->vol;
unsigned delta;
unsigned char blocksize_bits, cluster_size_shift;
ntfs_debug("Entering for mft_no 0x%lx, logical block 0x%llx.",
ni->mft_no, (unsigned long long)block);
if (ni->type != AT_DATA || !NInoNonResident(ni) || NInoEncrypted(ni)) {
ntfs_error(vol->sb, "BMAP does not make sense for %s "
"attributes, returning 0.",
(ni->type != AT_DATA) ? "non-data" :
(!NInoNonResident(ni) ? "resident" :
"encrypted"));
return 0;
}
/* None of these can happen. */
BUG_ON(NInoCompressed(ni));
BUG_ON(NInoMstProtected(ni));
blocksize = vol->sb->s_blocksize;
blocksize_bits = vol->sb->s_blocksize_bits;
ofs = (s64)block << blocksize_bits;
read_lock_irqsave(&ni->size_lock, flags);
size = ni->initialized_size;
i_size = i_size_read(VFS_I(ni));
read_unlock_irqrestore(&ni->size_lock, flags);
/*
* If the offset is outside the initialized size or the block straddles
* the initialized size then pretend it is a hole unless the
* initialized size equals the file size.
*/
if (unlikely(ofs >= size || (ofs + blocksize > size && size < i_size)))
goto hole;
cluster_size_shift = vol->cluster_size_bits;
down_read(&ni->runlist.lock);
lcn = ntfs_attr_vcn_to_lcn_nolock(ni, ofs >> cluster_size_shift, false);
up_read(&ni->runlist.lock);
if (unlikely(lcn < LCN_HOLE)) {
/*
* Step down to an integer to avoid gcc doing a long long
* comparision in the switch when we know @lcn is between
* LCN_HOLE and LCN_EIO (i.e. -1 to -5).
*
* Otherwise older gcc (at least on some architectures) will
* try to use __cmpdi2() which is of course not available in
* the kernel.
*/
switch ((int)lcn) {
case LCN_ENOENT:
/*
* If the offset is out of bounds then pretend it is a
* hole.
*/
goto hole;
case LCN_ENOMEM:
ntfs_error(vol->sb, "Not enough memory to complete "
"mapping for inode 0x%lx. "
"Returning 0.", ni->mft_no);
break;
default:
ntfs_error(vol->sb, "Failed to complete mapping for "
"inode 0x%lx. Run chkdsk. "
"Returning 0.", ni->mft_no);
break;
}
return 0;
}
if (lcn < 0) {
/* It is a hole. */
hole:
ntfs_debug("Done (returning hole).");
return 0;
}
/*
* The block is really allocated and fullfils all our criteria.
* Convert the cluster to units of block size and return the result.
*/
delta = ofs & vol->cluster_size_mask;
if (unlikely(sizeof(block) < sizeof(lcn))) {
block = lcn = ((lcn << cluster_size_shift) + delta) >>
blocksize_bits;
/* If the block number was truncated return 0. */
if (unlikely(block != lcn)) {
ntfs_error(vol->sb, "Physical block 0x%llx is too "
"large to be returned, returning 0.",
(long long)lcn);
return 0;
}
} else
block = ((lcn << cluster_size_shift) + delta) >>
blocksize_bits;
ntfs_debug("Done (returning block 0x%llx).", (unsigned long long)lcn);
return block;
}
/**
* ntfs_normal_aops - address space operations for normal inodes and attributes
*
* Note these are not used for compressed or mst protected inodes and
* attributes.
*/
const struct address_space_operations ntfs_normal_aops = {
.readpage = ntfs_readpage,
#ifdef NTFS_RW
.writepage = ntfs_writepage, /* Write dirty page to disk. */
.writepage = ntfs_writepage,
.set_page_dirty = __set_page_dirty_buffers,
#endif /* NTFS_RW */
.migratepage = buffer_migrate_page, /* Move a page cache page from
one physical page to an
other. */
.bmap = ntfs_bmap,
.migratepage = buffer_migrate_page,
.is_partially_uptodate = block_is_partially_uptodate,
.error_remove_page = generic_error_remove_page,
};
/**
* ntfs_compressed_aops - address space operations for compressed inodes
*/
const struct address_space_operations ntfs_compressed_aops = {
.readpage = ntfs_readpage,
#ifdef NTFS_RW
.writepage = ntfs_writepage,
.set_page_dirty = __set_page_dirty_buffers,
#endif /* NTFS_RW */
.migratepage = buffer_migrate_page,
.is_partially_uptodate = block_is_partially_uptodate,
.error_remove_page = generic_error_remove_page,
};
@@ -1564,9 +1704,8 @@ const struct address_space_operations ntfs_mst_aops = {
without touching the buffers
belonging to the page. */
#endif /* NTFS_RW */
.migratepage = buffer_migrate_page, /* Move a page cache page from
one physical page to an
other. */
.migratepage = buffer_migrate_page,
.is_partially_uptodate = block_is_partially_uptodate,
.error_remove_page = generic_error_remove_page,
};

19
fs/ntfs/inode.c
View File

@@ -1,7 +1,7 @@
/**
* inode.c - NTFS kernel inode handling. Part of the Linux-NTFS project.
* inode.c - NTFS kernel inode handling.
*
* Copyright (c) 2001-2007 Anton Altaparmakov
* Copyright (c) 2001-2014 Anton Altaparmakov and Tuxera Inc.
*
* This program/include file is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as published
@@ -1012,6 +1012,7 @@ skip_large_dir_stuff:
/* Setup the operations for this inode. */
vi->i_op = &ntfs_dir_inode_ops;
vi->i_fop = &ntfs_dir_ops;
vi->i_mapping->a_ops = &ntfs_mst_aops;
} else {
/* It is a file. */
ntfs_attr_reinit_search_ctx(ctx);
@@ -1160,11 +1161,12 @@ no_data_attr_special_case:
/* Setup the operations for this inode. */
vi->i_op = &ntfs_file_inode_ops;
vi->i_fop = &ntfs_file_ops;
vi->i_mapping->a_ops = &ntfs_normal_aops;
if (NInoMstProtected(ni))
vi->i_mapping->a_ops = &ntfs_mst_aops;
else if (NInoCompressed(ni))
vi->i_mapping->a_ops = &ntfs_compressed_aops;
}
if (NInoMstProtected(ni))
vi->i_mapping->a_ops = &ntfs_mst_aops;
else
vi->i_mapping->a_ops = &ntfs_aops;
/*
* The number of 512-byte blocks used on disk (for stat). This is in so
* far inaccurate as it doesn't account for any named streams or other
@@ -1414,10 +1416,11 @@ static int ntfs_read_locked_attr_inode(struct inode *base_vi, struct inode *vi)
ni->allocated_size = sle64_to_cpu(
a->data.non_resident.allocated_size);
}
vi->i_mapping->a_ops = &ntfs_normal_aops;
if (NInoMstProtected(ni))
vi->i_mapping->a_ops = &ntfs_mst_aops;
else
vi->i_mapping->a_ops = &ntfs_aops;
else if (NInoCompressed(ni))
vi->i_mapping->a_ops = &ntfs_compressed_aops;
if ((NInoCompressed(ni) || NInoSparse(ni)) && ni->type != AT_INDEX_ROOT)
vi->i_blocks = ni->itype.compressed.size >> 9;
else

8
fs/ntfs/ntfs.h
View File

@@ -1,8 +1,7 @@
/*
* ntfs.h - Defines for NTFS Linux kernel driver. Part of the Linux-NTFS
* project.
* ntfs.h - Defines for NTFS Linux kernel driver.
*
* Copyright (c) 2001-2005 Anton Altaparmakov
* Copyright (c) 2001-2014 Anton Altaparmakov and Tuxera Inc.
* Copyright (C) 2002 Richard Russon
*
* This program/include file is free software; you can redistribute it and/or
@@ -57,7 +56,8 @@ extern struct kmem_cache *ntfs_attr_ctx_cache;
extern struct kmem_cache *ntfs_index_ctx_cache;
/* The various operations structs defined throughout the driver files. */
extern const struct address_space_operations ntfs_aops;
extern const struct address_space_operations ntfs_normal_aops;
extern const struct address_space_operations ntfs_compressed_aops;
extern const struct address_space_operations ntfs_mst_aops;
extern const struct file_operations ntfs_file_ops;