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Commit 016b9c5f authored by Anton Altaparmakov's avatar Anton Altaparmakov
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Merge cantab.net:/usr/src/tng-2.0.11 into cantab.net:/usr/src/tng-2.0.13

parents 59b1ec78 8d9eae15
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Showing with 459 additions and 416 deletions
Documentation/filesystems/ntfs.txt
View file @ 016b9c5f
......@@ -247,6 +247,12 @@ ChangeLog
Note, a technical ChangeLog aimed at kernel hackers is in fs/ntfs/ChangeLog.
2.0.13:
- Internal changes towards using iget5_locked() in preparation for
fake inodes and small cleanups to ntfs_volume structure.
2.0.12:
- Internal cleanups in address space operations made possible by the
changes introduced in the previous release.
2.0.11:
- Internal updates and cleanups introducing the first step towards
fake inode based attribute i/o.
......
fs/ntfs/ChangeLog
View file @ 016b9c5f
......@@ -6,7 +6,7 @@ ToDo:
user open()s a file with i_size > s_maxbytes? Should read_inode()
truncate the visible i_size? Will the user just get -E2BIG (or
whatever) on open()? Or will (s)he be able to open() but lseek() and
read() will fail when s_maxbytes is reached? -> Investigate this!
read() will fail when s_maxbytes is reached? -> Investigate this.
- Implement/allow non-resident index bitmaps in dir.c::ntfs_readdir()
and then also consider initialized_size w.r.t. the bitmaps, etc.
- vcn_to_lcn() should somehow return the correct pointer within the
......@@ -17,14 +17,43 @@ ToDo:
- Consider if ntfs_file_read_compressed_block() shouldn't be coping
with initialized_size < data_size. I don't think it can happen but
it requires more careful consideration.
- CLEANUP: Modularise and reuse code in aops.c. At the moment we have
several copies of almost identicall functions and the functions are
quite big. Modularising them a bit, e.g. a-la get_block(), will make
them cleaner and make code reuse easier.
- CLEANUP: At the moment we have two copies of almost identical
functions in aops.c, can merge them once fake inode address space
based attribute i/o is further developed.
- CLEANUP: Modularising code in aops.c a bit, e.g. a-la get_block(),
will be cleaner and make code reuse easier.
- Modify ntfs_read_locked_inode() to return an error code and update
callers, i.e. ntfs_iget(), to pass that error code up instead of just
using -EIO.
- Enable NFS exporting of NTFS.
- Use iget5_locked() and friends instead of conventional iget().
- Use fake inodes for address space i/o.
2.0.13 - Use iget5_locked() in preparation for fake inodes and small cleanups.
- Remove nr_mft_bits and the now superfluous union with nr_mft_records
from ntfs_volume structure.
- Remove nr_lcn_bits and the now superfluous union with nr_clusters
from ntfs_volume structure.
- Use iget5_locked() and friends instead of conventional iget(). Wrap
the call in fs/ntfs/inode.c::ntfs_iget() and update callers of iget()
to use ntfs_iget(). Leave only one iget() call at mount time so we
don't need an ntfs_iget_mount().
- Change fs/ntfs/inode.c::ntfs_new_extent_inode() to take mft_no as an
additional argument.
2.0.12 - Initial cleanup of address space operations following 2.0.11 changes.
- Merge fs/ntfs/aops.c::end_buffer_read_mst_async() and
fs/ntfs/aops.c::end_buffer_read_file_async() into one function
fs/ntfs/aops.c::end_buffer_read_attr_async() using NInoMstProtected()
to determine whether to apply mst fixups or not.
- Above change allows merging fs/ntfs/aops.c::ntfs_file_read_block()
and fs/ntfs/aops.c::ntfs_mst_readpage() into one function
fs/ntfs/aops.c::ntfs_attr_read_block(). Also, create a tiny wrapper
fs/ntfs/aops.c::ntfs_mst_readpage() to transform the parameters from
the VFS readpage function prototype to the ntfs_attr_read_block()
function prototype.
2.0.11 - Initial preparations for fake inode based attribute i/o.
- Move definition of ntfs_inode_state_bits to fs/ntfs/inode.h and
......
fs/ntfs/Makefile
View file @ 016b9c5f
......@@ -5,7 +5,7 @@ obj-$(CONFIG_NTFS_FS) += ntfs.o
ntfs-objs := aops.o attrib.o compress.o debug.o dir.o file.o inode.o mft.o \
mst.o namei.o super.o sysctl.o time.o unistr.o upcase.o
EXTRA_CFLAGS = -DNTFS_VERSION=\"2.0.11\"
EXTRA_CFLAGS = -DNTFS_VERSION=\"2.0.13\"
ifeq ($(CONFIG_NTFS_DEBUG),y)
EXTRA_CFLAGS += -DDEBUG
......
fs/ntfs/aops.c
View file @ 016b9c5f
......@@ -3,7 +3,7 @@
* Part of the Linux-NTFS project.
*
* Copyright (c) 2001,2002 Anton Altaparmakov.
* Copyright (C) 2002 Richard Russon.
* Copyright (c) 2002 Richard Russon.
*
* 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
......@@ -30,31 +30,43 @@
#include "ntfs.h"
/**
* end_buffer_read_file_async -
* end_buffer_read_attr_async - async io completion for reading attributes
* @bh: buffer head on which io is completed
* @uptodate: whether @bh is now uptodate or not
*
* Async io completion handler for accessing files. Adapted from
* end_buffer_read_mst_async().
* Asynchronous I/O completion handler for reading pages belonging to the
* attribute address space of an inode. The inodes can either be files or
* directories or they can be fake inodes describing some attribute.
*
* If NInoMstProtected(), perform the post read mst fixups when all IO on the
* page has been completed and mark the page uptodate or set the error bit on
* the page. To determine the size of the records that need fixing up, we cheat
* a little bit by setting the index_block_size in ntfs_inode to the ntfs
* record size, and index_block_size_bits, to the log(base 2) of the ntfs
* record size.
*/
static void end_buffer_read_file_async(struct buffer_head *bh, int uptodate)
static void end_buffer_read_attr_async(struct buffer_head *bh, int uptodate)
{
static spinlock_t page_uptodate_lock = SPIN_LOCK_UNLOCKED;
unsigned long flags;
struct buffer_head *tmp;
struct page *page;
ntfs_inode *ni;
if (uptodate)
if (likely(uptodate))
set_buffer_uptodate(bh);
else
clear_buffer_uptodate(bh);
page = bh->b_page;
ni = NTFS_I(page->mapping->host);
if (likely(uptodate)) {
s64 file_ofs;
ntfs_inode *ni = NTFS_I(page->mapping->host);
file_ofs = (page->index << PAGE_CACHE_SHIFT) + bh_offset(bh);
/* Check for the current buffer head overflowing. */
if (file_ofs + bh->b_size > ni->initialized_size) {
char *addr;
int ofs = 0;
......@@ -82,10 +94,47 @@ static void end_buffer_read_file_async(struct buffer_head *bh, int uptodate)
SetPageError(page);
tmp = tmp->b_this_page;
}
spin_unlock_irqrestore(&page_uptodate_lock, flags);
if (!PageError(page))
SetPageUptodate(page);
/*
* If none of the buffers had errors then we can set the page uptodate,
* but we first have to perform the post read mst fixups, if the
* attribute is mst protected, i.e. if NInoMstProteced(ni) is true.
*/
if (!NInoMstProtected(ni)) {
if (likely(!PageError(page)))
SetPageUptodate(page);
unlock_page(page);
return;
} else {
char *addr;
unsigned int i, recs, nr_err;
u32 rec_size;
rec_size = ni->_IDM(index_block_size);
recs = PAGE_CACHE_SIZE / rec_size;
addr = kmap_atomic(page, KM_BIO_SRC_IRQ);
for (i = nr_err = 0; i < recs; i++) {
if (likely(!post_read_mst_fixup((NTFS_RECORD*)(addr +
i * rec_size), rec_size)))
continue;
nr_err++;
ntfs_error(ni->vol->sb, "post_read_mst_fixup() failed, "
"corrupt %s record 0x%Lx. Run chkdsk.",
ni->mft_no ? "index" : "mft",
(long long)(((s64)page->index <<
PAGE_CACHE_SHIFT >>
ni->_IDM(index_block_size_bits)) + i));
}
flush_dcache_page(page);
kunmap_atomic(addr, KM_BIO_SRC_IRQ);
if (likely(!nr_err && recs))
SetPageUptodate(page);
else {
ntfs_error(ni->vol->sb, "Setting page error, index "
"0x%lx.", page->index);
SetPageError(page);
}
}
unlock_page(page);
return;
still_busy:
......@@ -94,11 +143,20 @@ static void end_buffer_read_file_async(struct buffer_head *bh, int uptodate)
}
/**
* ntfs_file_read_block -
* ntfs_attr_read_block - fill a @page of an address space with data
* @page: page cache page to fill with data
*
* NTFS version of block_read_full_page(). Adapted from ntfs_mst_readpage().
* Fill the page @page of the address space belonging to the @page->host inode.
* We read each buffer asynchronously and when all buffers are read in, our io
* completion handler end_buffer_read_attr_async(), if required, automatically
* applies the mst fixups to the page before finally marking it uptodate and
* unlocking it.
*
* Return 0 on success and -errno on error.
*
* Contains an adapted version of fs/buffer.c::block_read_full_page().
*/
static int ntfs_file_read_block(struct page *page)
static int ntfs_attr_read_block(struct page *page)
{
VCN vcn;
LCN lcn;
......@@ -119,7 +177,7 @@ static int ntfs_file_read_block(struct page *page)
if (!page_has_buffers(page))
create_empty_buffers(page, blocksize, 0);
bh = head = page_buffers(page);
if (!bh)
if (unlikely(!bh))
return -ENOMEM;
blocks = PAGE_CACHE_SIZE >> blocksize_bits;
......@@ -128,11 +186,9 @@ static int ntfs_file_read_block(struct page *page)
zblock = (ni->initialized_size + blocksize - 1) >> blocksize_bits;
#ifdef DEBUG
if (unlikely(!ni->mft_no)) {
ntfs_error(vol->sb, "NTFS: Attempt to access $MFT! This is a "
"very serious bug! Denying access...");
return -EACCES;
}
if (unlikely(!ni->run_list.rl && !ni->mft_no))
panic("NTFS: $MFT/$DATA run list has been unmapped! This is a "
"very serious bug! Cannot continue...");
#endif
/* Loop through all the buffers in the page. */
......@@ -211,7 +267,7 @@ static int ntfs_file_read_block(struct page *page)
for (i = 0; i < nr; i++) {
struct buffer_head *tbh = arr[i];
lock_buffer(tbh);
tbh->b_end_io = end_buffer_read_file_async;
tbh->b_end_io = end_buffer_read_attr_async;
set_buffer_async_read(tbh);
}
/* Finally, start i/o on the buffers. */
......@@ -220,7 +276,7 @@ static int ntfs_file_read_block(struct page *page)
return 0;
}
/* No i/o was scheduled on any of the buffers. */
if (!PageError(page))
if (likely(!PageError(page)))
SetPageUptodate(page);
else /* Signal synchronous i/o error. */
nr = -EIO;
......@@ -234,17 +290,17 @@ static int ntfs_file_read_block(struct page *page)
* @page: page cache page to fill with data
*
* For non-resident attributes, ntfs_file_readpage() fills the @page of the open
* file @file by calling the generic block_read_full_page() function provided by
* the kernel which in turn invokes our ntfs_file_get_block() callback in order
* to create and read in the buffers associated with the page asynchronously.
* file @file by calling the ntfs version of the generic block_read_full_page()
* function provided by the kernel, ntfs_attr_read_block(), which in turn
* creates and reads in the buffers associated with the page asynchronously.
*
* For resident attributes, OTOH, ntfs_file_readpage() fills @page by copying
* the data from the mft record (which at this stage is most likely in memory)
* and fills the remainder with zeroes. Thus, in this case I/O is synchronous,
* and fills the remainder with zeroes. Thus, in this case, I/O is synchronous,
* as even if the mft record is not cached at this point in time, we need to
* wait for it to be read in before we can do the copy.
*
* Return zero on success or -errno on error.
* Return 0 on success or -errno on error.
*/
static int ntfs_file_readpage(struct file *file, struct page *page)
{
......@@ -256,43 +312,43 @@ static int ntfs_file_readpage(struct file *file, struct page *page)
u32 attr_len;
int err = 0;
if (!PageLocked(page))
if (unlikely(!PageLocked(page)))
PAGE_BUG(page);
ni = NTFS_I(page->mapping->host);
/* Is the unnamed $DATA attribute resident? */
if (test_bit(NI_NonResident, &ni->state)) {
if (NInoNonResident(ni)) {
/* Attribute is not resident. */
/* If the file is encrypted, we deny access, just like NT4. */
if (test_bit(NI_Encrypted, &ni->state)) {
if (NInoEncrypted(ni)) {
err = -EACCES;
goto unl_err_out;
}
/* Compressed data stream. Handled in compress.c. */
if (test_bit(NI_Compressed, &ni->state))
if (NInoCompressed(ni))
return ntfs_file_read_compressed_block(page);
/* Normal data stream. */
return ntfs_file_read_block(page);
return ntfs_attr_read_block(page);
}
/* Attribute is resident, implying it is not compressed or encrypted. */
/* Map, pin and lock the mft record for reading. */
mrec = map_mft_record(READ, ni);
if (IS_ERR(mrec)) {
if (unlikely(IS_ERR(mrec))) {
err = PTR_ERR(mrec);
goto unl_err_out;
}
ctx = get_attr_search_ctx(ni, mrec);
if (!ctx) {
if (unlikely(!ctx)) {
err = -ENOMEM;
goto unm_unl_err_out;
}
/* Find the data attribute in the mft record. */
if (!lookup_attr(AT_DATA, NULL, 0, 0, 0, NULL, 0, ctx)) {
if (unlikely(!lookup_attr(AT_DATA, NULL, 0, 0, 0, NULL, 0, ctx))) {
err = -ENOENT;
goto put_unm_unl_err_out;
}
......@@ -330,6 +386,25 @@ static int ntfs_file_readpage(struct file *file, struct page *page)
return err;
}
/**
* ntfs_mst_readpage - fill a @page of the mft or a directory with data
* @file: open file/directory to which the @page belongs or NULL
* @page: page cache page to fill with data
*
* Readpage method for the VFS address space operations of directory inodes
* and the $MFT/$DATA attribute.
*
* We just call ntfs_attr_read_block() here, in fact we only need this wrapper
* because of the difference in function parameters.
*/
int ntfs_mst_readpage(struct file *file, struct page *page)
{
if (unlikely(!PageLocked(page)))
PAGE_BUG(page);
return ntfs_attr_read_block(page);
}
/**
* end_buffer_read_mftbmp_async -
*
......@@ -343,7 +418,7 @@ static void end_buffer_read_mftbmp_async(struct buffer_head *bh, int uptodate)
struct buffer_head *tmp;
struct page *page;
if (uptodate)
if (likely(uptodate))
set_buffer_uptodate(bh);
else
clear_buffer_uptodate(bh);
......@@ -386,7 +461,7 @@ static void end_buffer_read_mftbmp_async(struct buffer_head *bh, int uptodate)
}
spin_unlock_irqrestore(&page_uptodate_lock, flags);
if (!PageError(page))
if (likely(!PageError(page)))
SetPageUptodate(page);
unlock_page(page);
return;
......@@ -410,7 +485,7 @@ static int ntfs_mftbmp_readpage(ntfs_volume *vol, struct page *page)
int nr, i;
unsigned char blocksize_bits;
if (!PageLocked(page))
if (unlikely(!PageLocked(page)))
PAGE_BUG(page);
blocksize = vol->sb->s_blocksize;
......@@ -419,7 +494,7 @@ static int ntfs_mftbmp_readpage(ntfs_volume *vol, struct page *page)
if (!page_has_buffers(page))
create_empty_buffers(page, blocksize, 0);
bh = head = page_buffers(page);
if (!bh)
if (unlikely(!bh))
return -ENOMEM;
blocks = PAGE_CACHE_SIZE >> blocksize_bits;
......@@ -503,264 +578,7 @@ static int ntfs_mftbmp_readpage(ntfs_volume *vol, struct page *page)
return 0;
}
/* No i/o was scheduled on any of the buffers. */
if (!PageError(page))
SetPageUptodate(page);
else /* Signal synchronous i/o error. */
nr = -EIO;
unlock_page(page);
return nr;
}
/**
* end_buffer_read_mst_async - async io completion for reading index records
* @bh: buffer head on which io is completed
* @uptodate: whether @bh is now uptodate or not
*
* Asynchronous I/O completion handler for reading pages belonging to the
* index allocation attribute address space of directory inodes.
*
* Perform the post read mst fixups when all IO on the page has been completed
* and marks the page uptodate or sets the error bit on the page.
*
* Adapted from fs/buffer.c.
*
* NOTE: We use this function as async io completion handler for reading pages
* belonging to the mft data attribute address space, too as this saves
* duplicating an almost identical function. We do this by cheating a little
* bit in setting the index_block_size in the mft ntfs_inode to the mft record
* size of the volume (vol->mft_record_size), and index_block_size_bits to
* mft_record_size_bits, respectively.
*/
static void end_buffer_read_mst_async(struct buffer_head *bh, int uptodate)
{
static spinlock_t page_uptodate_lock = SPIN_LOCK_UNLOCKED;
unsigned long flags;
struct buffer_head *tmp;
struct page *page;
ntfs_inode *ni;
if (uptodate)
set_buffer_uptodate(bh);
else
clear_buffer_uptodate(bh);
page = bh->b_page;
ni = NTFS_I(page->mapping->host);
if (likely(uptodate)) {
s64 file_ofs;
file_ofs = (page->index << PAGE_CACHE_SHIFT) + bh_offset(bh);
/* Check for the current buffer head overflowing. */
if (file_ofs + bh->b_size > ni->initialized_size) {
char *addr;
int ofs = 0;
if (file_ofs < ni->initialized_size)
ofs = ni->initialized_size - file_ofs;
addr = kmap_atomic(page, KM_BIO_SRC_IRQ);
memset(addr + bh_offset(bh) + ofs, 0, bh->b_size - ofs);
flush_dcache_page(page);
kunmap_atomic(addr, KM_BIO_SRC_IRQ);
}
} else
SetPageError(page);
spin_lock_irqsave(&page_uptodate_lock, flags);
clear_buffer_async_read(bh);
unlock_buffer(bh);
tmp = bh->b_this_page;
while (tmp != bh) {
if (buffer_locked(tmp)) {
if (buffer_async_read(tmp))
goto still_busy;
} else if (!buffer_uptodate(tmp))
SetPageError(page);
tmp = tmp->b_this_page;
}
spin_unlock_irqrestore(&page_uptodate_lock, flags);
/*
* If none of the buffers had errors then we can set the page uptodate,
* but we first have to perform the post read mst fixups.
*/
if (!PageError(page)) {
char *addr;
unsigned int i, recs, nr_err = 0;
u32 rec_size;
rec_size = ni->_IDM(index_block_size);
recs = PAGE_CACHE_SIZE / rec_size;
addr = kmap_atomic(page, KM_BIO_SRC_IRQ);
for (i = 0; i < recs; i++) {
if (!post_read_mst_fixup((NTFS_RECORD*)(addr +
i * rec_size), rec_size))
continue;
nr_err++;
ntfs_error(ni->vol->sb, "post_read_mst_fixup() failed, "
"corrupt %s record 0x%Lx. Run chkdsk.",
ni->mft_no ? "index" : "mft",
(long long)((page->index <<
PAGE_CACHE_SHIFT >>
ni->_IDM(index_block_size_bits)) + i));
}
flush_dcache_page(page);
kunmap_atomic(addr, KM_BIO_SRC_IRQ);
if (likely(!nr_err && recs))
SetPageUptodate(page);
else {
ntfs_error(ni->vol->sb, "Setting page error, index "
"0x%lx.", page->index);
SetPageError(page);
}
}
unlock_page(page);
return;
still_busy:
spin_unlock_irqrestore(&page_uptodate_lock, flags);
return;
}
/**
* ntfs_mst_readpage - fill a @page of the mft or a directory with data
* @file: open file/directory to which the page @page belongs or NULL
* @page: page cache page to fill with data
*
* Readpage method for the VFS address space operations.
*
* Fill the page @page of the $MFT or the open directory @dir. We read each
* buffer asynchronously and when all buffers are read in our io completion
* handler end_buffer_read_mst_async() automatically applies the mst fixups to
* the page before finally marking it uptodate and unlocking it.
*
* Contains an adapted version of fs/buffer.c::block_read_full_page().
*/
int ntfs_mst_readpage(struct file *dir, struct page *page)
{
VCN vcn;
LCN lcn;
ntfs_inode *ni;
ntfs_volume *vol;
struct buffer_head *bh, *head, *arr[MAX_BUF_PER_PAGE];
sector_t iblock, lblock, zblock;
unsigned int blocksize, blocks, vcn_ofs;
int i, nr;
unsigned char blocksize_bits;
if (!PageLocked(page))
PAGE_BUG(page);
ni = NTFS_I(page->mapping->host);
vol = ni->vol;
blocksize_bits = VFS_I(ni)->i_blkbits;
blocksize = 1 << blocksize_bits;
if (!page_has_buffers(page))
create_empty_buffers(page, blocksize, 0);
bh = head = page_buffers(page);
if (!bh)
return -ENOMEM;
blocks = PAGE_CACHE_SIZE >> blocksize_bits;
iblock = page->index << (PAGE_CACHE_SHIFT - blocksize_bits);
lblock = (ni->allocated_size + blocksize - 1) >> blocksize_bits;
zblock = (ni->initialized_size + blocksize - 1) >> blocksize_bits;
#ifdef DEBUG
if (unlikely(!ni->run_list.rl && !ni->mft_no))
panic("NTFS: $MFT/$DATA run list has been unmapped! This is a "
"very serious bug! Cannot continue...");
#endif
/* Loop through all the buffers in the page. */
nr = i = 0;
do {
if (unlikely(buffer_uptodate(bh)))
continue;
if (unlikely(buffer_mapped(bh))) {
arr[nr++] = bh;
continue;
}
bh->b_bdev = vol->sb->s_bdev;
/* Is the block within the allowed limits? */
if (iblock < lblock) {
BOOL is_retry = FALSE;
/* Convert iblock into corresponding vcn and offset. */
vcn = (VCN)iblock << blocksize_bits >>
vol->cluster_size_bits;
vcn_ofs = ((VCN)iblock << blocksize_bits) &
vol->cluster_size_mask;
retry_remap:
/* Convert the vcn to the corresponding lcn. */
down_read(&ni->run_list.lock);
lcn = vcn_to_lcn(ni->run_list.rl, vcn);
up_read(&ni->run_list.lock);
/* Successful remap. */
if (lcn >= 0) {
/* Setup buffer head to correct block. */
bh->b_blocknr = ((lcn << vol->cluster_size_bits)
+ vcn_ofs) >> blocksize_bits;
set_buffer_mapped(bh);
/* Only read initialized data blocks. */
if (iblock < zblock) {
arr[nr++] = bh;
continue;
}
/* Fully non-initialized data block, zero it. */
goto handle_zblock;
}
/* It is a hole, need to zero it. */
if (lcn == LCN_HOLE)
goto handle_hole;
/* If first try and run list unmapped, map and retry. */
if (!is_retry && lcn == LCN_RL_NOT_MAPPED) {
is_retry = TRUE;
if (!map_run_list(ni, vcn))
goto retry_remap;
}
/* Hard error, zero out region. */
SetPageError(page);
ntfs_error(vol->sb, "vcn_to_lcn(vcn = 0x%Lx) failed "
"with error code 0x%Lx%s.",
(long long)vcn, (long long)-lcn,
is_retry ? " even after retrying" : "");
// FIXME: Depending on vol->on_errors, do something.
}
/*
* Either iblock was outside lblock limits or vcn_to_lcn()
* returned error. Just zero that portion of the page and set
* the buffer uptodate.
*/
handle_hole:
bh->b_blocknr = -1UL;
clear_buffer_mapped(bh);
handle_zblock:
memset(kmap(page) + i * blocksize, 0, blocksize);
flush_dcache_page(page);
kunmap(page);
set_buffer_uptodate(bh);
} while (i++, iblock++, (bh = bh->b_this_page) != head);
/* Check we have at least one buffer ready for i/o. */
if (nr) {
/* Lock the buffers. */
for (i = 0; i < nr; i++) {
struct buffer_head *tbh = arr[i];
lock_buffer(tbh);
tbh->b_end_io = end_buffer_read_mst_async;
set_buffer_async_read(tbh);
}
/* Finally, start i/o on the buffers. */
for (i = 0; i < nr; i++)
submit_bh(READ, arr[i]);
return 0;
}
/* No i/o was scheduled on any of the buffers. */
if (!PageError(page))
if (likely(!PageError(page)))
SetPageUptodate(page);
else /* Signal synchronous i/o error. */
nr = -EIO;
......
fs/ntfs/inode.c
View file @ 016b9c5f
......@@ -24,6 +24,178 @@
#include "ntfs.h"
#include "dir.h"
#include "inode.h"
#include "attrib.h"
/**
* ntfs_attr - ntfs in memory attribute structure
* @mft_no: mft record number of the base mft record of this attribute
* @name: Unicode name of the attribute (NULL if unnamed)
* @name_len: length of @name in Unicode characters (0 if unnamed)
* @type: attribute type (see layout.h)
*
* This structure exists only to provide a small structure for the
* ntfs_iget()/ntfs_test_inode()/ntfs_init_locked_inode() mechanism.
*
* NOTE: Elements are ordered by size to make the structure as compact as
* possible on all architectures.
*/
typedef struct {
unsigned long mft_no;
uchar_t *name;
u32 name_len;
ATTR_TYPES type;
} ntfs_attr;
/**
* ntfs_test_inode - compare two (possibly fake) inodes for equality
* @vi: vfs inode which to test
* @na: ntfs attribute which is being tested with
*
* Compare the ntfs attribute embedded in the ntfs specific part of the vfs
* inode @vi for equality with the ntfs attribute @na.
*
* If searching for the normal file/directory inode, set @na->type to AT_UNUSED.
* @na->name and @na->name_len are then ignored.
*
* Return 1 if the attributes match and 0 if not.
*
* NOTE: This function runs with the inode_lock spin lock held so it is not
* allowed to sleep.
*/
static int ntfs_test_inode(struct inode *vi, ntfs_attr *na)
{
ntfs_inode *ni;
if (vi->i_ino != na->mft_no)
return 0;
ni = NTFS_I(vi);
/* If !NInoAttr(ni), @vi is a normal file or directory inode. */
if (likely(!NInoAttr(ni))) {
/* If not looking for a normal inode this is a mismatch. */
if (unlikely(na->type != AT_UNUSED))
return 0;
} else {
/* A fake inode describing an attribute. */
if (ni->type != na->type)
return 0;
if (ni->name_len != na->name_len)
return 0;
if (na->name_len && memcmp(ni->name, na->name,
na->name_len * sizeof(uchar_t)))
return 0;
}
/* Match! */
return 1;
}
/**
* ntfs_init_locked_inode - initialize an inode
* @vi: vfs inode to initialize
* @na: ntfs attribute which to initialize @vi to
*
* Initialize the vfs inode @vi with the values from the ntfs attribute @na in
* order to enable ntfs_test_inode() to do its work.
*
* If initializing the normal file/directory inode, set @na->type to AT_UNUSED.
* In that case, @na->name and @na->name_len should be set to NULL and 0,
* respectively. Although that is not strictly necessary as
* ntfs_read_inode_locked() will fill them in later.
*
* Return 0 on success and -errno on error.
*
* NOTE: This function runs with the inode_lock spin lock held so it is not
* allowed to sleep. (Hence the GFP_ATOMIC allocation.)
*/
static int ntfs_init_locked_inode(struct inode *vi, ntfs_attr *na)
{
ntfs_inode *ni = NTFS_I(vi);
vi->i_ino = na->mft_no;
ni->type = na->type;
ni->name = na->name;
ni->name_len = na->name_len;
/* If initializing a normal inode, we are done. */
if (likely(na->type == AT_UNUSED))
return 0;
/* It is a fake inode. */
NInoSetAttr(ni);
/*
* We have I30 global constant as an optimization as it is the name
* in >99.9% of named attributes! The other <0.1% incur a GFP_ATOMIC
* allocation but that is ok. And most attributes are unnamed anyway,
* thus the fraction of named attributes with name != I30 is actually
* absolutely tiny.
*/
if (na->name && na->name_len && na->name != I30) {
unsigned int i;
i = na->name_len * sizeof(uchar_t);
ni->name = (uchar_t*)kmalloc(i + sizeof(uchar_t), GFP_ATOMIC);
if (!ni->name)
return -ENOMEM;
memcpy(ni->name, na->name, i);
ni->name[i] = cpu_to_le16('\0');
}
return 0;
}
typedef int (*test_t)(struct inode *, void *);
typedef int (*set_t)(struct inode *, void *);
static void ntfs_read_locked_inode(struct inode *vi);
/**
* ntfs_iget - obtain a struct inode corresponding to a specific normal inode
* @sb: super block of mounted volume
* @mft_no: mft record number / inode number to obtain
*
* Obtain the struct inode corresponding to a specific normal inode (i.e. a
* file or directory).
*
* If the inode is in the cache, it is just returned with an increased
* reference count. Otherwise, a new struct inode is allocated and initialized,
* and finally ntfs_read_locked_inode() is called to read in the inode and
* fill in the remainder of the inode structure.
*
* Return the struct inode on success. Check the return value with IS_ERR() and
* if true, the function failed and the error code is obtained from PTR_ERR().
*/
struct inode *ntfs_iget(struct super_block *sb, unsigned long mft_no)
{
struct inode *vi;
ntfs_attr na;
na.mft_no = mft_no;
na.type = AT_UNUSED;
na.name = NULL;
na.name_len = 0;
vi = iget5_locked(sb, mft_no, (test_t)ntfs_test_inode,
(set_t)ntfs_init_locked_inode, &na);
if (!vi)
return ERR_PTR(-ENOMEM);
/* If this is a freshly allocated inode, need to read it now. */
if (vi->i_state & I_NEW) {
ntfs_read_locked_inode(vi);
unlock_new_inode(vi);
}
#if 0
// TODO: Enable this and do the follow up cleanup, i.e. remove all the
// bad inode checks. -- BUT: Do we actually want to do this? -- It may
// result in repeated attemps to read a bad inode which is not
// desirable. (AIA)
/*
* There is no point in keeping bad inodes around. This also simplifies
* things in that we never need to check for bad inodes elsewhere.
*/
if (is_bad_inode(vi)) {
iput(vi);
vi = ERR_PTR(-EIO);
}
#endif
return vi;
}
struct inode *ntfs_alloc_big_inode(struct super_block *sb)
{
......@@ -32,12 +204,12 @@ struct inode *ntfs_alloc_big_inode(struct super_block *sb)
ntfs_debug("Entering.");
ni = (ntfs_inode *)kmem_cache_alloc(ntfs_big_inode_cache,
SLAB_NOFS);
if (!ni) {
ntfs_error(sb, "Allocation of NTFS big inode structure "
"failed.");
return NULL;
if (likely(ni != NULL)) {
ni->state = 0;
return VFS_I(ni);
}
return VFS_I(ni);
ntfs_error(sb, "Allocation of NTFS big inode structure failed.");
return NULL;
}
void ntfs_destroy_big_inode(struct inode *inode)
......@@ -49,14 +221,17 @@ void ntfs_destroy_big_inode(struct inode *inode)
kmem_cache_free(ntfs_big_inode_cache, NTFS_I(inode));
}
ntfs_inode *ntfs_alloc_extent_inode(void)
static ntfs_inode *ntfs_alloc_extent_inode(void)
{
ntfs_inode *ni = (ntfs_inode *)kmem_cache_alloc(ntfs_inode_cache,
SLAB_NOFS);
ntfs_debug("Entering.");
if (unlikely(!ni))
ntfs_error(NULL, "Allocation of NTFS inode structure failed.");
return ni;
if (likely(ni != NULL)) {
ni->state = 0;
return ni;
}
ntfs_error(NULL, "Allocation of NTFS inode structure failed.");
return NULL;
}
void ntfs_destroy_extent_inode(ntfs_inode *ni)
......@@ -68,27 +243,42 @@ void ntfs_destroy_extent_inode(ntfs_inode *ni)
/**
* __ntfs_init_inode - initialize ntfs specific part of an inode
* @sb: super block of mounted volume
* @ni: freshly allocated ntfs inode which to initialize
*
* Initialize an ntfs inode to defaults.
*
* NOTE: ni->mft_no, ni->state, ni->type, ni->name, and ni->name_len are left
* untouched. Make sure to initialize them elsewhere.
*
* Return zero on success and -ENOMEM on error.
*/
static void __ntfs_init_inode(struct super_block *sb, ntfs_inode *ni)
{
ntfs_debug("Entering.");
memset(ni, 0, sizeof(ntfs_inode));
ni->initialized_size = ni->allocated_size = 0;
ni->seq_no = 0;
atomic_set(&ni->count, 1);
ni->vol = NULL;
ni->vol = NTFS_SB(sb);
init_run_list(&ni->run_list);
init_rwsem(&ni->mrec_lock);
atomic_set(&ni->mft_count, 0);
ni->page = NULL;
ni->page_ofs = 0;
ni->attr_list_size = 0;
ni->attr_list = NULL;
init_run_list(&ni->attr_list_rl);
ni->_IDM(index_block_size) = 0;
ni->_IDM(index_vcn_size) = 0;
ni->_IDM(bmp_size) = 0;
ni->_IDM(bmp_initialized_size) = 0;
ni->_IDM(bmp_allocated_size) = 0;
init_run_list(&ni->_IDM(bmp_rl));
ni->_IDM(index_block_size_bits) = 0;
ni->_IDM(index_vcn_size_bits) = 0;
init_MUTEX(&ni->extent_lock);
ni->nr_extents = 0;
ni->_INE(base_ntfs_ino) = NULL;
ni->vol = NTFS_SB(sb);
return;
}
......@@ -102,13 +292,18 @@ static void ntfs_init_big_inode(struct inode *vi)
return;
}
ntfs_inode *ntfs_new_extent_inode(struct super_block *sb)
ntfs_inode *ntfs_new_extent_inode(struct super_block *sb, unsigned long mft_no)
{
ntfs_inode *ni = ntfs_alloc_extent_inode();
ntfs_debug("Entering.");
if (ni)
if (likely(ni != NULL)) {
__ntfs_init_inode(sb, ni);
ni->mft_no = mft_no;
ni->type = AT_UNUSED;
ni->name = NULL;
ni->name_len = 0;
}
return ni;
}
......@@ -189,18 +384,20 @@ static int ntfs_is_extended_system_file(attr_search_context *ctx)
}
/**
* ntfs_read_inode - read an inode from its device
* ntfs_read_locked_inode - read an inode from its device
* @vi: inode to read
*
* ntfs_read_inode() is called from the VFS iget() function to read the inode
* ntfs_read_locked_inode() is called from the ntfs_iget() to read the inode
* described by @vi into memory from the device.
*
* The only fields in @vi that we need to/can look at when the function is
* called are i_sb, pointing to the mounted device's super block, and i_ino,
* the number of the inode to load.
* the number of the inode to load. If this is a fake inode, i.e. NInoAttr(),
* then the fields type, name, and name_len are also valid, and describe the
* attribute which this fake inode represents.
*
* ntfs_read_inode() maps, pins and locks the mft record number i_ino for
* reading and sets up the necessary @vi fields as well as initializing
* ntfs_read_locked_inode() maps, pins and locks the mft record number i_ino
* for reading and sets up the necessary @vi fields as well as initializing
* the ntfs inode.
*
* Q: What locks are held when the function is called?
......@@ -209,9 +406,9 @@ static int ntfs_is_extended_system_file(attr_search_context *ctx)
* i_flags is set to 0 and we have no business touching it. Only an ioctl()
* is allowed to write to them. We should of course be honouring them but
* we need to do that using the IS_* macros defined in include/linux/fs.h.
* In any case ntfs_read_inode() has nothing to do with i_flags at all.
* In any case ntfs_read_locked_inode() has nothing to do with i_flags.
*/
void ntfs_read_inode(struct inode *vi)
static void ntfs_read_locked_inode(struct inode *vi)
{
ntfs_volume *vol = NTFS_SB(vi->i_sb);
ntfs_inode *ni;
......@@ -661,7 +858,7 @@ void ntfs_read_inode(struct inode *vi)
vi->i_fop = &ntfs_dir_ops;
vi->i_mapping->a_ops = &ntfs_dir_aops;
} else {
/* It is a file: find first extent of unnamed data attribute. */
/* It is a file. */
reinit_attr_search_ctx(ctx);
/* Setup the data attribute, even if not present. */
......@@ -669,6 +866,7 @@ void ntfs_read_inode(struct inode *vi)
ni->name = NULL;
ni->name_len = 0;
/* Find first extent of the unnamed data attribute. */
if (!lookup_attr(AT_DATA, NULL, 0, 0, 0, NULL, 0, ctx)) {
vi->i_size = ni->initialized_size =
ni->allocated_size = 0LL;
......@@ -877,15 +1075,17 @@ void ntfs_read_inode_mount(struct inode *vi)
ntfs_debug("Entering.");
/* Initialize the ntfs specific part of @vi. */
ntfs_init_big_inode(vi);
ni = NTFS_I(vi);
if (vi->i_ino != FILE_MFT) {
ntfs_error(sb, "Called for inode 0x%lx but only inode %d "
"allowed.", vi->i_ino, FILE_MFT);
goto err_out;
}
/* Initialize the ntfs specific part of @vi. */
ntfs_init_big_inode(vi);
ni = NTFS_I(vi);
/* Setup the data attribute. It is special as it is mst protected. */
NInoSetNonResident(ni);
NInoSetMstProtected(ni);
......@@ -1158,7 +1358,7 @@ void ntfs_read_inode_mount(struct inode *vi)
ntfs_error(sb, "$MFT is too big! Aborting.");
goto put_err_out;
}
vol->_VMM(nr_mft_records) = ll;
vol->nr_mft_records = ll;
/*
* We have got the first extent of the run_list for
* $MFT which means it is now relatively safe to call
......@@ -1184,7 +1384,7 @@ void ntfs_read_inode_mount(struct inode *vi)
* ntfs_read_inode() on extents of $MFT/$DATA. But lets
* hope this never happens...
*/
ntfs_read_inode(vi);
ntfs_read_locked_inode(vi);
if (is_bad_inode(vi)) {
ntfs_error(sb, "ntfs_read_inode() of $MFT "
"failed. BUG or corrupt $MFT. "
......
fs/ntfs/inode.h
View file @ 016b9c5f
......@@ -231,14 +231,16 @@ static inline struct inode *VFS_I(ntfs_inode *ni)
return &((big_ntfs_inode*)ni)->vfs_inode;
}
extern struct inode *ntfs_iget(struct super_block *sb, unsigned long mft_no);
extern struct inode *ntfs_alloc_big_inode(struct super_block *sb);
extern void ntfs_destroy_big_inode(struct inode *inode);
extern void ntfs_clear_big_inode(struct inode *vi);
extern ntfs_inode *ntfs_new_extent_inode(struct super_block *sb);
extern ntfs_inode *ntfs_new_extent_inode(struct super_block *sb,
unsigned long mft_no);
extern void ntfs_clear_extent_inode(ntfs_inode *ni);
extern void ntfs_read_inode(struct inode *vi);
extern void ntfs_read_inode_mount(struct inode *vi);
extern void ntfs_dirty_inode(struct inode *vi);
......
fs/ntfs/mft.c
View file @ 016b9c5f
......@@ -102,7 +102,7 @@ extern int ntfs_mst_readpage(struct file *, struct page *);
* ntfs_mft_aops - address space operations for access to $MFT
*
* Address space operations for access to $MFT. This allows us to simply use
* read_cache_page() in map_mft_record().
* ntfs_map_page() in map_mft_record_page().
*/
struct address_space_operations ntfs_mft_aops = {
writepage: NULL, /* Write dirty page to disk. */
......@@ -417,14 +417,13 @@ MFT_RECORD *map_extent_mft_record(ntfs_inode *base_ni, MFT_REF mref,
return m;
}
/* Record wasn't there. Get a new ntfs inode and initialize it. */
ni = ntfs_new_extent_inode(base_ni->vol->sb);
ni = ntfs_new_extent_inode(base_ni->vol->sb, mft_no);
if (!ni) {
up(&base_ni->extent_lock);
atomic_dec(&base_ni->count);
return ERR_PTR(-ENOMEM);
}
ni->vol = base_ni->vol;
ni->mft_no = mft_no;
ni->seq_no = seq_no;
ni->nr_extents = -1;
ni->_INE(base_ntfs_ino) = base_ni;
......
fs/ntfs/namei.c
View file @ 016b9c5f
......@@ -38,8 +38,8 @@
* supplying the name of the inode in @dent->d_name.name. ntfs_lookup()
* converts the name to Unicode and walks the contents of the directory inode
* @dir_ino looking for the converted Unicode name. If the name is found in the
* directory, the corresponding inode is loaded by calling iget() on its inode
* number and the inode is associated with the dentry @dent via a call to
* directory, the corresponding inode is loaded by calling ntfs_iget() on its
* inode number and the inode is associated with the dentry @dent via a call to
* d_add().
*
* If the name is not found in the directory, a NULL inode is inserted into the
......@@ -111,9 +111,9 @@ static struct dentry *ntfs_lookup(struct inode *dir_ino, struct dentry *dent)
kmem_cache_free(ntfs_name_cache, uname);
if (!IS_ERR_MREF(mref)) {
dent_ino = MREF(mref);
ntfs_debug("Found inode 0x%lx. Calling iget.", dent_ino);
dent_inode = iget(vol->sb, dent_ino);
if (dent_inode) {
ntfs_debug("Found inode 0x%lx. Calling ntfs_iget.", dent_ino);
dent_inode = ntfs_iget(vol->sb, dent_ino);
if (likely(!IS_ERR(dent_inode))) {
/* Consistency check. */
if (MSEQNO(mref) == NTFS_I(dent_inode)->seq_no ||
dent_ino == FILE_MFT) {
......@@ -132,16 +132,19 @@ static struct dentry *ntfs_lookup(struct inode *dir_ino, struct dentry *dent)
ntfs_error(vol->sb, "Found stale reference to inode "
"0x%lx (reference sequence number = "
"0x%x, inode sequence number = 0x%x, "
"returning -EACCES. Run chkdsk.",
"returning -EIO. Run chkdsk.",
dent_ino, MSEQNO(mref),
NTFS_I(dent_inode)->seq_no);
iput(dent_inode);
dent_inode = ERR_PTR(-EIO);
} else
ntfs_error(vol->sb, "iget(0x%lx) failed, returning "
"-EACCES.", dent_ino);
ntfs_error(vol->sb, "ntfs_iget(0x%lx) failed with "
"error code %li.", dent_ino,
PTR_ERR(dent_inode));
if (name)
kfree(name);
return ERR_PTR(-EACCES);
/* Return the error code. */
return (struct dentry *)dent_inode;
}
/* It is guaranteed that name is no longer allocated at this point. */
if (MREF_ERR(mref) == -ENOENT) {
......@@ -256,7 +259,8 @@ static struct dentry *ntfs_lookup(struct inode *dir_ino, struct dentry *dent)
BUG_ON(real_dent->d_inode != dent_inode);
/*
* Already have the inode and the dentry attached, decrement
* the reference count to balance the iget() we did earlier on.
* the reference count to balance the ntfs_iget() we did
* earlier on.
*/
iput(dent_inode);
return real_dent;
......
fs/ntfs/super.c
View file @ 016b9c5f
......@@ -605,17 +605,17 @@ static BOOL parse_ntfs_boot_sector(ntfs_volume *vol, const NTFS_BOOT_SECTOR *b)
sizeof(unsigned long) * 4);
return FALSE;
}
vol->_VCL(nr_clusters) = ll;
ntfs_debug("vol->nr_clusters = 0x%Lx", (long long)vol->_VCL(nr_clusters));
vol->nr_clusters = ll;
ntfs_debug("vol->nr_clusters = 0x%Lx", (long long)vol->nr_clusters);
ll = sle64_to_cpu(b->mft_lcn);
if (ll >= vol->_VCL(nr_clusters)) {
if (ll >= vol->nr_clusters) {
ntfs_error(vol->sb, "MFT LCN is beyond end of volume. Weird.");
return FALSE;
}
vol->mft_lcn = ll;
ntfs_debug("vol->mft_lcn = 0x%Lx", (long long)vol->mft_lcn);
ll = sle64_to_cpu(b->mftmirr_lcn);
if (ll >= vol->_VCL(nr_clusters)) {
if (ll >= vol->nr_clusters) {
ntfs_error(vol->sb, "MFTMirr LCN is beyond end of volume. "
"Weird.");
return FALSE;
......@@ -629,7 +629,7 @@ static BOOL parse_ntfs_boot_sector(ntfs_volume *vol, const NTFS_BOOT_SECTOR *b)
* Determine MFT zone size. This is not strictly the right place to do
* this, but I am too lazy to create a function especially for it...
*/
vol->mft_zone_end = vol->_VCL(nr_clusters);
vol->mft_zone_end = vol->nr_clusters;
switch (vol->mft_zone_multiplier) { /* % of volume size in clusters */
case 4:
vol->mft_zone_end = vol->mft_zone_end >> 1; /* 50% */
......@@ -678,9 +678,9 @@ static BOOL load_and_init_upcase(ntfs_volume *vol)
ntfs_debug("Entering.");
/* Read upcase table and setup vol->upcase and vol->upcase_len. */
ino = iget(sb, FILE_UpCase);
if (!ino || is_bad_inode(ino)) {
if (ino)
ino = ntfs_iget(sb, FILE_UpCase);
if (IS_ERR(ino) || is_bad_inode(ino)) {
if (!IS_ERR(ino))
iput(ino);
goto upcase_failed;
}
......@@ -848,7 +848,7 @@ static BOOL load_system_files(ntfs_volume *vol)
vol->mftbmp_allocated_size =
sle64_to_cpu(attr->_ANR(allocated_size));
/* Consistency check. */
if (vol->mftbmp_size < (vol->_VMM(nr_mft_records) + 7) >> 3) {
if (vol->mftbmp_size < (vol->nr_mft_records + 7) >> 3) {
ntfs_error(sb, "$MFT/$BITMAP is too short to "
"contain a complete mft "
"bitmap: impossible. $MFT is "
......@@ -914,9 +914,9 @@ static BOOL load_system_files(ntfs_volume *vol)
// volume read-write...
/* Get mft mirror inode. */
vol->mftmirr_ino = iget(sb, FILE_MFTMirr);
if (!vol->mftmirr_ino || is_bad_inode(vol->mftmirr_ino)) {
if (is_bad_inode(vol->mftmirr_ino))
vol->mftmirr_ino = ntfs_iget(sb, FILE_MFTMirr);
if (IS_ERR(vol->mftmirr_ino) || is_bad_inode(vol->mftmirr_ino)) {
if (!IS_ERR(vol->mftmirr_ino))
iput(vol->mftmirr_ino);
ntfs_error(sb, "Failed to load $MFTMirr.");
return FALSE;
......@@ -932,13 +932,13 @@ static BOOL load_system_files(ntfs_volume *vol)
* need for any locking at this stage as we are already running
* exclusively as we are mount in progress task.
*/
vol->lcnbmp_ino = iget(sb, FILE_Bitmap);
if (!vol->lcnbmp_ino || is_bad_inode(vol->lcnbmp_ino)) {
if (is_bad_inode(vol->lcnbmp_ino))
vol->lcnbmp_ino = ntfs_iget(sb, FILE_Bitmap);
if (IS_ERR(vol->lcnbmp_ino) || is_bad_inode(vol->lcnbmp_ino)) {
if (!IS_ERR(vol->lcnbmp_ino))
iput(vol->lcnbmp_ino);
goto bitmap_failed;
}
if ((vol->_VCL(nr_lcn_bits) + 7) >> 3 > vol->lcnbmp_ino->i_size) {
if ((vol->nr_clusters + 7) >> 3 > vol->lcnbmp_ino->i_size) {
iput(vol->lcnbmp_ino);
bitmap_failed:
ntfs_error(sb, "Failed to load $Bitmap.");
......@@ -948,9 +948,9 @@ static BOOL load_system_files(ntfs_volume *vol)
* Get the volume inode and setup our cache of the volume flags and
* version.
*/
vol->vol_ino = iget(sb, FILE_Volume);
if (!vol->vol_ino || is_bad_inode(vol->vol_ino)) {
if (is_bad_inode(vol->vol_ino))
vol->vol_ino = ntfs_iget(sb, FILE_Volume);
if (IS_ERR(vol->vol_ino) || is_bad_inode(vol->vol_ino)) {
if (!IS_ERR(vol->vol_ino))
iput(vol->vol_ino);
volume_failed:
ntfs_error(sb, "Failed to load $Volume.");
......@@ -993,9 +993,9 @@ static BOOL load_system_files(ntfs_volume *vol)
* Get the inode for the logfile and empty it if this is a read-write
* mount.
*/
tmp_ino = iget(sb, FILE_LogFile);
if (!tmp_ino || is_bad_inode(tmp_ino)) {
if (is_bad_inode(tmp_ino))
tmp_ino = ntfs_iget(sb, FILE_LogFile);
if (IS_ERR(tmp_ino) || is_bad_inode(tmp_ino)) {
if (!IS_ERR(tmp_ino))
iput(tmp_ino);
ntfs_error(sb, "Failed to load $LogFile.");
// FIMXE: We only want to empty the thing so pointless bailing
......@@ -1010,9 +1010,9 @@ static BOOL load_system_files(ntfs_volume *vol)
* Get the inode for the attribute definitions file and parse the
* attribute definitions.
*/
tmp_ino = iget(sb, FILE_AttrDef);
if (!tmp_ino || is_bad_inode(tmp_ino)) {
if (is_bad_inode(tmp_ino))
tmp_ino = ntfs_iget(sb, FILE_AttrDef);
if (IS_ERR(tmp_ino) || is_bad_inode(tmp_ino)) {
if (!IS_ERR(tmp_ino))
iput(tmp_ino);
ntfs_error(sb, "Failed to load $AttrDef.");
goto iput_vol_bmp_mirr_err_out;
......@@ -1020,9 +1020,9 @@ static BOOL load_system_files(ntfs_volume *vol)
// FIXME: Parse the attribute definitions.
iput(tmp_ino);
/* Get the root directory inode. */
vol->root_ino = iget(sb, FILE_root);
if (!vol->root_ino || is_bad_inode(vol->root_ino)) {
if (is_bad_inode(vol->root_ino))
vol->root_ino = ntfs_iget(sb, FILE_root);
if (IS_ERR(vol->root_ino) || is_bad_inode(vol->root_ino)) {
if (!IS_ERR(vol->root_ino))
iput(vol->root_ino);
ntfs_error(sb, "Failed to load root directory.");
goto iput_vol_bmp_mirr_err_out;
......@@ -1032,18 +1032,18 @@ static BOOL load_system_files(ntfs_volume *vol)
return TRUE;
/* NTFS 3.0+ specific initialization. */
/* Get the security descriptors inode. */
vol->secure_ino = iget(sb, FILE_Secure);
if (!vol->secure_ino || is_bad_inode(vol->secure_ino)) {
if (is_bad_inode(vol->secure_ino))
vol->secure_ino = ntfs_iget(sb, FILE_Secure);
if (IS_ERR(vol->secure_ino) || is_bad_inode(vol->secure_ino)) {
if (!IS_ERR(vol->secure_ino))
iput(vol->secure_ino);
ntfs_error(sb, "Failed to load $Secure.");
goto iput_root_vol_bmp_mirr_err_out;
}
// FIXME: Initialize security.
/* Get the extended system files' directory inode. */
tmp_ino = iget(sb, FILE_Extend);
if (!tmp_ino || is_bad_inode(tmp_ino)) {
if (is_bad_inode(tmp_ino))
tmp_ino = ntfs_iget(sb, FILE_Extend);
if (IS_ERR(tmp_ino) || is_bad_inode(tmp_ino)) {
if (!IS_ERR(tmp_ino))
iput(tmp_ino);
ntfs_error(sb, "Failed to load $Extend.");
goto iput_sec_root_vol_bmp_mirr_err_out;
......@@ -1051,8 +1051,8 @@ static BOOL load_system_files(ntfs_volume *vol)
// FIXME: Do something. E.g. want to delete the $UsnJrnl if exists.
// Note we might be doing this at the wrong level; we might want to
// d_alloc_root() and then do a "normal" open(2) of $Extend\$UsnJrnl
// rather than using iget here, as we don't know the inode number for
// the files in $Extend directory.
// rather than using ntfs_iget here, as we don't know the inode number
// for the files in $Extend directory.
iput(tmp_ino);
return TRUE;
iput_sec_root_vol_bmp_mirr_err_out:
......@@ -1172,7 +1172,7 @@ s64 get_nr_free_clusters(ntfs_volume *vol)
* Convert the number of bits into bytes rounded up, then convert into
* multiples of PAGE_CACHE_SIZE.
*/
max_index = (vol->_VCL(nr_clusters) + 7) >> (3 + PAGE_CACHE_SHIFT);
max_index = (vol->nr_clusters + 7) >> (3 + PAGE_CACHE_SHIFT);
/* Use multiples of 4 bytes. */
max_size = PAGE_CACHE_SIZE >> 2;
ntfs_debug("Reading $BITMAP, max_index = 0x%lx, max_size = 0x%x.",
......@@ -1211,7 +1211,7 @@ s64 get_nr_free_clusters(ntfs_volume *vol)
* Get the multiples of 4 bytes in use in the final partial
* page.
*/
max_size = ((((vol->_VCL(nr_clusters) + 7) >> 3) & ~PAGE_CACHE_MASK)
max_size = ((((vol->nr_clusters + 7) >> 3) & ~PAGE_CACHE_MASK)
+ 3) >> 2;
/* If there is a partial page go back and do it. */
if (max_size) {
......@@ -1254,7 +1254,7 @@ unsigned long get_nr_free_mft_records(ntfs_volume *vol)
* Convert the number of bits into bytes rounded up, then convert into
* multiples of PAGE_CACHE_SIZE.
*/
max_index = (vol->_VMM(nr_mft_records) + 7) >> (3 + PAGE_CACHE_SHIFT);
max_index = (vol->nr_mft_records + 7) >> (3 + PAGE_CACHE_SHIFT);
/* Use multiples of 4 bytes. */
max_size = PAGE_CACHE_SIZE >> 2;
ntfs_debug("Reading $MFT/$BITMAP, max_index = 0x%lx, max_size = "
......@@ -1293,12 +1293,12 @@ unsigned long get_nr_free_mft_records(ntfs_volume *vol)
* Get the multiples of 4 bytes in use in the final partial
* page.
*/
max_size = ((((vol->_VMM(nr_mft_records) + 7) >> 3) &
max_size = ((((vol->nr_mft_records + 7) >> 3) &
~PAGE_CACHE_MASK) + 3) >> 2;
/* If there is a partial page go back and do it. */
if (max_size) {
/* Compensate for out of bounds zero bits. */
if ((i = vol->_VMM(nr_mft_records) & 31))
if ((i = vol->nr_mft_records & 31))
nr_free -= 32 - i;
ntfs_debug("Handling partial page, max_size = 0x%x",
max_size);
......@@ -1345,7 +1345,7 @@ int ntfs_statfs(struct super_block *sb, struct statfs *sfs)
* inodes are also stored in data blocs ($MFT is a file) this is just
* the total clusters.
*/
sfs->f_blocks = vol->_VCL(nr_clusters) << vol->cluster_size_bits >>
sfs->f_blocks = vol->nr_clusters << vol->cluster_size_bits >>
PAGE_CACHE_SHIFT;
/* Free data blocks in file system in units of f_bsize. */
size = get_nr_free_clusters(vol) << vol->cluster_size_bits >>
......@@ -1394,8 +1394,6 @@ struct super_operations ntfs_mount_sops = {
struct super_operations ntfs_sops = {
alloc_inode: ntfs_alloc_big_inode, /* VFS: Allocate a new inode. */
destroy_inode: ntfs_destroy_big_inode, /* VFS: Deallocate an inode. */
read_inode: ntfs_read_inode, /* VFS: Load inode from disk,
called from iget(). */
dirty_inode: ntfs_dirty_inode, /* VFS: Called from
__mark_inode_dirty(). */
//write_inode: NULL, /* VFS: Write dirty inode to disk. */
......@@ -1575,9 +1573,9 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
/*
* Now load the metadata required for the page cache and our address
* space operations to function. We do this by setting up a specialised
* read_inode method and then just calling iget() to obtain the inode
* for $MFT which is sufficient to allow our normal inode operations
* and associated address space operations to function.
* read_inode method and then just calling the normal iget() to obtain
* the inode for $MFT which is sufficient to allow our normal inode
* operations and associated address space operations to function.
*/
/*
* Poison vol->mft_ino so we know whether iget() called into our
......@@ -1601,9 +1599,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
* Note: sb->s_op has already been set to &ntfs_sops by our specialized
* ntfs_read_inode_mount() method when it was invoked by iget().
*/
down(&ntfs_lock);
/*
* The current mount is a compression user if the cluster size is
* less than or equal 4kiB.
......@@ -1618,7 +1614,6 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
goto iput_tmp_ino_err_out_now;
}
}
/*
* Increment the number of mounts and generate the global default
* upcase table if necessary. Also temporarily increment the number of
......@@ -1629,12 +1624,10 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
ntfs_nr_upcase_users++;
up(&ntfs_lock);
/*
* From now on, ignore @silent parameter. If we fail below this line,
* it will be due to a corrupt fs or a system error, so we report it.
*/
/*
* Open the system files with normal access functions and complete
* setting up the ntfs super block.
......@@ -1643,9 +1636,8 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
ntfs_error(sb, "Failed to load system files.");
goto unl_upcase_iput_tmp_ino_err_out_now;
}
if ((sb->s_root = d_alloc_root(vol->root_ino))) {
/* We increment i_count simulating an iget(). */
/* We increment i_count simulating an ntfs_iget(). */
atomic_inc(&vol->root_ino->i_count);
ntfs_debug("Exiting, status successful.");
/* Release the default upcase if it has no users. */
......@@ -1710,10 +1702,10 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
#undef OGIN
/*
* This is needed to get ntfs_clear_extent_inode() called for each
* inode we have ever called iget()/iput() on, otherwise we A) leak
* resources and B) a subsequent mount fails automatically due to
* iget() never calling down into our ntfs_read_inode{_mount}() methods
* again...
* inode we have ever called ntfs_iget()/iput() on, otherwise we A)
* leak resources and B) a subsequent mount fails automatically due to
* ntfs_iget() never calling down into our ntfs_read_locked_inode()
* method again...
*/
if (invalidate_inodes(sb)) {
ntfs_error(sb, "Busy inodes left. This is most likely a NTFS "
......
fs/ntfs/volume.h
View file @ 016b9c5f
......@@ -3,7 +3,7 @@
* of the Linux-NTFS project.
*
* Copyright (c) 2001,2002 Anton Altaparmakov.
* Copyright (C) 2002 Richard Russon.
* Copyright (c) 2002 Richard Russon.
*
* 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
......@@ -89,10 +89,8 @@ typedef struct {
u32 index_record_size; /* in bytes */
u32 index_record_size_mask; /* index_record_size - 1 */
u8 index_record_size_bits; /* log2(index_record_size) */
union {
LCN nr_clusters; /* Volume size in clusters. */
LCN nr_lcn_bits; /* Number of bits in lcn bitmap. */
} SN(vcl);
LCN nr_clusters; /* Volume size in clusters == number of
bits in lcn bitmap. */
LCN mft_lcn; /* Cluster location of mft data. */
LCN mftmirr_lcn; /* Cluster location of copy of mft. */
u64 serial_no; /* The volume serial number. */
......@@ -104,10 +102,8 @@ typedef struct {
struct inode *mft_ino; /* The VFS inode of $MFT. */
struct rw_semaphore mftbmp_lock; /* Lock for serializing accesses to the
mft record bitmap ($MFT/$BITMAP). */
union {
unsigned long nr_mft_records; /* Number of mft records. */
unsigned long nr_mft_bits; /* Number of bits in mft bitmap. */
} SN(vmm);
unsigned long nr_mft_records; /* Number of mft records == number of
bits in mft bitmap. */
struct address_space mftbmp_mapping; /* Page cache for $MFT/$BITMAP. */
run_list mftbmp_rl; /* Run list for $MFT/$BITMAP. */
s64 mftbmp_size; /* Data size of $MFT/$BITMAP. */
......@@ -128,8 +124,5 @@ typedef struct {
struct nls_table *nls_map;
} ntfs_volume;
#define _VCL(X) SC(vcl,X)
#define _VMM(X) SC(vmm,X)
#endif /* _LINUX_NTFS_VOLUME_H */
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