This patch adds the ability for the libext2fs functions to read and
write the inode checksum.
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Change libext2fs to read and write full-size inodes in preparation for
the metadata checksumming patchset, which will require this. Due to
ABI compatibility requirements, this change must be hidden from client
programs.
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Create a new function, io_channel_alloc_buf() which allocates I/O
buffers with appropriate alignment if we are using direct I/O. The
original code was sometimes using a larger alignment factor than
necessary, and would always request an aligned memory buffer even when
it was not necessary since the block device was not opened with
O_DIRECT.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
The DEFS line in MCONFIG had gotten so long that it exceeded 4k, and
this was starting to cause some tools heartburn. It also made "make
V=1" almost useless, since trying to following the individual commands
run by make was lost in the noise of all of the defines.
So fix this by putting the configure-generated defines in lib/config.h
and the directory pathnames to lib/dirpaths.h.
In addition, clean up some vestigal defines in configure.in and in the
Makefiles to further shorten the cc command lines.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
In inode_open(), if the allocation of &io fails, we go to cleanup
and dereference io to test io->name, which is a bug.
Similarly in undo_open() if allocation of &data fails, we
go to cleanup and dereference data to test data->real.
In the test_open() case we explicitly set retval to the only
possible error return from ext2fs_get_mem(), so remove that
for tidiness.
The other changes just make make earlier returns go through
the error goto for consistency.
In many cases we returned directly from the first error, but
"goto cleanup" etc for every subsequent error. In some
cases this leads to "impossible" tests such as:
if (ptr)
ext2fs_free_mem(&ptr)
on paths where ptr cannot be null because we would have
returned directly earlier, and Coverity flags this.
This isn't really indicative of an error in most cases, but
I think it can be clearer to always exit through the error goto
if it's used later in the function.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Allocate various memory structures to be properly aligned to avoid
needing to use a bounce buffer when doing direct I/O read/writes.
This should also help on FreeBSD systems which require aligned buffers
unconditionally.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
The top-level COPYING file states that the e2p and ext2fs libraries
are available under the LGPLv2. The files were incorrectly labelled.
Alex Thomas/Luster has been consulted wrt to the ext3_extents.h file;
the rest of the files were primarily authored by Theodore Ts'o.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
After cleaning up ext2fs_bg_flag_set() and ext2fs_bg_flag_clear(),
we're left with ext2fs_bg_flag_test(). Convert it to
ext2fs_bg_flags_test().
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Some of these could affect filesystems between 2^31 and 2^32-1 blocks.
Thanks to Valerie Aurora Henson for pointing out the problems in
lib/ext2fs/alloc_tables.c, which led me to do a "make gcc-wall" scan
over the source tree.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
As Li Zefan <lizf@cn.fujitsu.com> reported, the creation timestamp was
not getting set on the lost+found inode. This patch makes sure all of
the timestamps are appropriately set.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
It looks like the right place to check for ino=0 in
ext2fs_read_inode_full() is before creating the inode cache, otherwise
since we set icache[i].ino = 0 in create_icache(), it will match the
loop below and thus we return a wrong value.
Signed-off-by: "Manish Katiyar" <mkatiyar@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Previously, the portion of the inode table for block group 0 was
always completely zero'ed out, so the ext2fs_open_inode_scan() didn't
handle a non-zero bg_itable_used value for the first block group. Fix
this.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This simplifies the code, and using the uninit_bg with the inode table
lazily initialized is just as good.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This addresses a potential security vulnerability where an untrusted
filesystem can be corrupted in such a way that a program using
libext2fs will allocate a buffer which is far too small. This can
lead to either a crash or potentially a heap-based buffer overflow
crash. No known exploits exist, but main concern is where an
untrusted user who possesses privileged access in a guest Xen
environment could corrupt a filesystem which is then accessed by the
pygrub program, running as root in the dom0 host environment, thus
allowing the untrusted user to gain privileged access in the host OS.
Thanks to the McAfee AVERT Research group for reporting this issue.
Addresses CVE-2007-5497.
Signed-off-by: Rafal Wojtczuk <rafal_wojtczuk@mcafee.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
On big-endian systems, while swapping, ext2fs_swap_inode_full() swaps
only 128+extra_isize bytes and the EAs if they are present. Now if inode
N has EAs, (and this is the inode in the "scratch inode") then inode N+1
also carries seems to have them since the "scratch inode" was never
zeroed.
Signed-off-by: Kalpak Shah <kalpak@clusterfs.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
The following patch addresses a memory leak in libext2fs
that occurs when using ext2fs_write_new_inode() on a file system
configured with large inodes.
Signed-off-by: Jim Garlick <garlick@llnl.gov>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This feature is initially intended for testing purposes; it allows an
ext2/ext3 developer to create very large filesystems using sparse files
where most of the block groups are not initialized and so do not require
much disk space. Eventually it could be used as a way of speeding up
mke2fs and e2fsck for large filesystem, but that would be best done by
adding an RO_COMPAT extension to the filesystem to allow the inode table
to be lazily initialized on a per-block basis, instead of being entirely initialized
or entirely unused on a per-blockgroup basis.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
a new inode we make sure that the extra information in the inode (any extra
fields in a large inode and any ea-in-inode information) is cleared. This
can happen when e2fsck creates a new root inode or a new lost+found directory,
or when the user uses the debugfs write, mknod, or mkdir commands. Otherwise,
the newly create inode could inherit garbage (or old EA information) from
a previously deleted inode.
byte-swapping options to e2fsck. This was the cause of some hard to
reproduce problems that had been reported in the past, and which the
resize_inode changes tickled in a much more repeatable fashion.
dumpe2fs.c: Use WORDS_BIGENDIAN to determine whether or not we're
(not) using i386 byte order.
dumpe2fs.c, mke2fs.c: Stop using the compatibility badblocks function,
and use the ext2fs_badblocks_* functions instead.
ChangeLog, inode.c, tst_iscan.c:
inode.c, tst_iscan.c: Stop using the compatibility badblocks function,
and use the ext2fs_badblocks_* functions instead.
ChangeLog, badblocks.c:
badblocks.c: Stop using the compatibility badblocks function, and use
the ext2fs_badblocks_* functions instead.
Makefile.in: Add message.c and swapfs.c to the list of source files to
build the make depend.
swapfs.c, unix.c: Only support the -s and -S options to e2fsck if
ENABLE_SWAPFS is defined.
Many files:
ext2fs.h, bitops.h, block.c, bmap.c, closefs.c, dirblock.c, inode.c,
native.c, openfs.c, rw_bitmaps.c, swapfs.c: Only include the
byte-swapping logic if ENABLE_SWAPFS is turned on or if we're on a
big-endian machine.
initialize.c (ext2fs_initialize):Use WORDS_BIGENDIAN directly to set
EXT2_FLAG_SWAP_BYTES, instead of using ext2fs_native_flag.
native.c (ext2fs_native_flag): Use WORDS_BIGENDIAN provided by
autoconf to determine whether or not return EXT2_FLAG_SWAP_BYTES.
ext2fs.h (EXT2_FLAG_IMAGE_FILE): Add new flag, and add image_header
field in the ext2_filsys structure
block.c (block_iterate_ind, block_iterate_dind, block_iterate_tind):
inode.c (ext2fs_read_inode):
rw_bitmaps.c (read_bitmaps):
openfs.c (ext2fs_open): Add support for EXT2_FLAG_IMAGE_FILE
imager.c (ext2fs_image_bitmap_read): Fix bug in imager to make sure
the full bitmap is saved.
alloc.c, bb_inode.c, bitmaps.c, bitops.h, block.c, bmap.c, bmove.c,
brel.h, cmp_bitmaps.c, dblist.c, dblist_dir.c, dir_iterate.c,
expanddir.c, ext2fs.h, ext2fsP.h, fileio.c, finddev.c, get_pathname.c,
icount.c, inode.c, irel.h, irel_ma.c, ismounted.c, link.c, lookup.c,
mkdir.c, mkjournal.c, namei.c, newdir.c, read_bb_file.c, test_io.c,
tst_iscan.c, unix_io.c, unlink.c: Change use of ino_t to ext2_ino_t,
to protect applications that attempt to compile
-D_FILE_OFFSET_BITS=64, since this inexplicably changes ino_t(!?). So
we use ext2_ino_t to avoid an unexpected ABI change.
inode.c (ext2fs_flush_icache): Add new function ext2fs_flush_icache()
which flushes the internal inode cache. Applications which modify the
inode table blocks directly must call this function.
inode.c (ext2fs_read_inode, ext2fs_write_inode): Check to see if the
inode number is zero; if it's zero, return EXT2_ET_BAD_INODE_NUM.
ChangeLog, fsck.c:
fsck.c (load_fs_info): If the pass number field is missing, it needs
to be treated as zero.
libext2fs.texinfo, README:
Update for 1.14 release.
Add a -V option which displays the current version.
ChangeLog, unix.c:
unix.c (e2fsck_update_progress): Remove unused variables.
ChangeLog, inode.c:
inode.c (get_next_blockgroup): Fix bug where if get_next_blockgroup()
is called early because of a missing inode table in a block group, the
current_inode counter wasn't incremented correctly.
ChangeLog, tst_uuid.c:
tst_uuid.c (main): Fixed bogus declaration of the main's argv parameter.
ChangeLog, test_icount.c:
test_icount.c (main): Fix main() declaration so that it returns int,
not void.
Many files:
fsck.c (ignore): Remove unused variable cp.
chattr.c (fatal_error):
tune2fs.c (usage):
lsattr.c (usage):
dumpe2fs.c (usage):
badblocks.c (usage): Remove volatile from declaration.
fsck.c: Change use of strdup to be string_copy, since we don't trust
what glibc is doing with strdup. (Whatever it is, it isn't pretty.)
Set the immutable flag on the block and character device so that
e2fsck notices them as bad devices, and offers to fix them. E2fsck
currently only checks devices with the immutable flag set, since
otherwise there might be some false positives --- the kernel doesn't
always clear the all of i_blocks[n], n>=4, due to a race condition.
ChangeLog, inode.c:
inode.c (ext2fs_get_next_inode): Always do the check to see if the
inode table is missing so that we catch the case where the first block
group is missing.
inode.c (ext2fs_open_inode_scan): Initialize the group variables
so that we don't need to call get_next_blockgroup() the first
time around. Saves a bit of time, and prevents us from
needing to assign -1 to current_group (which is an unsigned
value).
icount.c (insert_icount_el): Cast the estimated number of inodes
from a float to an ino_t.
alloc.c, alloc_tables.c, badlbocks.c, bb_compat.c, bb_inode.c,
bitmaps.c, bitops.c, block.c, bmap.c, bmove.c, brel_ma.c,
check_desc.c, closefs.c, cmp_bitmaps.c, dblist.c,
dblist_dir.c, dir_iterate.c, dirblock.c, dupfs.c, expanddir.c,
ext2fs.h, fileio.c, freefs.c, get_pathname.c, getsize.c,
icount.c, initialize.c, inline.c, inode.c, irel_ma.c,
ismounted.c, link.c, lookup.c, mkdir.c, namei.c, native.c,
newdir.c, openfs.c, read_bb.c, read_bb_file.c, rs_bitmap.c,
rw_bitmaps.c, swapfs.c, test_io.c, tst_badblocks.c,
tst_getsize.c, tst_iscan.c, unix_io.c, unlink.c, valid_blk.c,
version.c: If EXT2_FLAT_INCLUDES is defined, then assume all
of the ext2-specific header files are in a flat directory.
block.c, bmove.c, dirblock.c, fileio.c: Explicitly cast
all assignments from void * to be compatible with C++.
closefs.c (ext2fs_flush): Add a call to io_channel_flush() to
make sure the contents of the disk are flushed to disk.
dblist.c (ext2fs_add_dir_block): Change new to be new_entry to
avoid C++ namespace clash.
bitmaps.c (ext2fs_copy_bitmap): Change new to be new_map to
avoid C++ namespace clash.
ext2fs.h, bb_inode.c, block.c, bmove.c, brel.h, brel_ma.c,
irel.h, irel_ma.c, dblist.c, dblist_dir.c, dir_iterate.c,
ext2fsP.h, expanddir.c, get_pathname.c, inode.c, link.c,
unlink.c: Change private to be priv_data (to avoid C++
namespace clash)
dblist.c (ext2fs_get_num_dirs): Make ext2fs_get_num_dirs more paranoid
about validating the directory counts from the block group
information.
all files: Don't include stdlib.h anymore; include it in ext2_fs.h,
since that file requires stdlib.h
ChangeLog, Makefile.in, dirinfo.c:
dirinfo.c (e2fsck_add_dir_info): Use ext2fs_get_num_dirs instead of
e2fsck_get_num_dirs, which has been removed.
Makefile.in (PROGS): Remove @EXTRA_PROGS@, since we don't want to
compile and install flushb.
ChangeLog, configure.in:
Remove @EXTRA_PROGS@, since we aren't using it in 2fsck/Makefile.in anymore
ChangeLog, Makefile.in:
Install debugfs in /sbin, instead of /usr/sbin.
libext2fs.texinfo:
Update version string to be 1.12
Makefile.in:
Fix bug in find script which made the exclusion list, where a '-' was
missing from an -name option.
Darrick J. Wong