Reserve EXT4_FEATURE_RO_COMPAT_METADATA_CSUM and
EXT2_FEATURE_COMPAT_EXCLUDE_BITMAP. Also reserve fields in the
superblock and the inode for the checksums. In the block group
descriptor, reserve the exclude bitmap field for the snapshot feature,
and checksums for the inode and block allocation bitmaps.
With this commit, the metadata checksum and exclude bitmap features
should have reserved all of the fields they need in ext4's on-disk
format.
This commit also fixes an a missing byte swap for s_overhead_blocks.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Darrick J. Wong <djwong@us.ibm.com>
Cc: Amir Goldstein <amir73il@gmail.com>
ext2fs_group_last_block2() already properly calculates
the last block in the last group, so there is no need
to special-case this after the call.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Code to count the number of blocks in the last partial
group is cut and pasted around the e2fsprogs codebase
a few times.
Making this a helper function should improve matters.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
If e2fsprogs tools (mke2fs, e2fsck) is run on regular file instead of
on block device, we can use punch hole instead of regular discard
command which would not work on regular file anyway. This gives us
several advantages. First of all when e2fsck is run with '-E discard'
parameter it will punch out all ununsed space from the image, hence
trimming down the file system image. And secondly, when creating an
file system on regular file (with '-E discard' which is default), we
can use punch hole to clear the file content, hence we can skip inode
table initialization, because reads from sparse area returns zeros. This
will result in faster file system creation (without the need to specify
lazy_itable_init) and smaller images.
This commit also fixes some tests that would fail due to mke2fs showing
discard progress, hence the output would differ.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
In many places we are using #ifdef HAVE_OPEN64 to determine if we can
use open64() but that's ugly. This commit creates two new helpers
ext2fs_open_file() for open() and ext2fs_stat() for stat(). Also we need
new typedef ext2fs_struct_stat for struct stat.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Add a slicing-by-8 CRC32c implementation for metadata checksumming.
Adapted from Bob Pearson's kernel patch.
Also added a self-test mechanism so we can verify that the crc32c
implementation is working correctly.
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
The condition ((start+num) & ~0xffffffffULL) in bitmap_range2
and generic_bmap_range funcs in get_bitmap64.c was wrong and
inconsistent with the condition (start+num-1 > bmap->real_end)
in generic_bitmap_range funcs in get_bitmap.c.
I got the following error from tune2fs on a 16TB fs:
Illegal block number passed to ext2fs_unmark_block_bitmap #4294967295
for block bitmap for 16TB.img
tune2fs: Invalid argument while reading bitmaps
Fix to condition to ((start+num-1) & ~0xffffffffULL), because
the bit (start+num) is not going to be changed by the funcs.
Signed-off-by: Amir Goldstein <amir73il@users.sf.net>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
The dump program relies on fs->frag_size and the
EXT2_FRAGS_PER_BLOCK() macro. Kind of silly for it to do so, but it's
part of the kludgy way the dump program (which was originally written
for the BSD FFS was ported over to support ext2/3.) Given how it
makes assumptions about the ext2/3/4 file system being similar to the
BSD FFS, it's a bit of a miracle it works for ext4 --- or at least
appears to work...
Addresses-Debian-Bug: #636418
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This is needed to support online resizing for > 32-bit file systems
Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This patch adds support for doing quota accounting during full
e2fsck scan if the 'quota' feature was set on the superblock.
If user-visible quota inodes are in use, they will be hidden
and converted to the reserved quota inodes.
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This patch adds the quota library (ported form Jan Kara's quota-tools) in
e2fsprogs in order to make quotas as a first class supported feature in Ext4.
This patch also provides interface in lib/quota/mkquota.h that will be used by
mke2fs, tune2fs, e2fsck, etc. to initialize and update quota files.
This first version of the quota library does not support reading existing quota
files. This support will be added in the near future.
Thanks to Jan Kara for his work on quota-tools. Most of the files in this patch
are taken as-is from quota tools and were simply modified to work with
libext2fs in e2fsprogs.
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Remove the interpolation because there is a bug in icount which can
cause a core dump if calculated range gets turned into a NaN and then
do an out-of-bounds array access. We could fix this with some more
tests, but the complexity is such that nuking all of the interpolation
code will be faster than fixing the interpolation.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
The f_lotsbad regression test was failing on some systems
with:
Restarting e2fsck from the beginning...
Pass 1: Checking inodes, blocks, and sizes
+Illegal block number passed to ext2fs_test_block_bitmap #0 for in-use block map
Pass 2: Checking directory structure
Entry 'termcap' in / (2) has deleted/unused inode 12. Clear? yes
Running with valgrind (./test_script --valgrind f_lotsbad) we
see:
+==31409== Conditional jump or move depends on uninitialised value(s)
+==31409== at 0x42927A: ext2fs_test_generic_bmap (gen_bitmap64.c:378)
among others.
Looking at gen_bitmap64.c:
376: arg >>= bitmap->cluster_bits;
377:
378: if ((arg < bitmap->start) || (arg > bitmap->end)) {
A little more debugging showed that it was actually
bitmap->cluster_bits which was uninitialized, because it never
gets copied over in ext2fs_copy_generic_bmap()
Patch below resolves the issue.
Reported-by: Andreas Dilger <adilger@whamcloud.com>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
If the callback interator modifies a block in the middle of an extent
during a call to the block iterator, causing the extent to be split,
ext2_block_iterate3() will end up calling the callback function twice
for some number of blocks. Fix this.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Use the EXT2_I_SIZE() macro consistently to access the inode size.
The i_size/i_size_high combination is open coded in several places.
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Change ext2fs_block_alloc_stats2() so that when a cluster is
allocated, the free blocks counter in the superblock is appropriately
decremented by the cluster size.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Commit 25567a7b0f accidentally removed the initialization for flexbg
and flexbg_size, which affected ext2fs_allocate_group_table() and
ext2fs_allocate_tables(). Replace them.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Filesystems with a blocksize of 1024 have the superblock starting at
block #1. However, the first data block in the superblock is 0 to
simplify the cluster calculations. So we must compensate for this in
a number of places, mostly in the ext2fs library, but also in e2fsck.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
lib/ext2fs/Makefile.in had a buggy entry for blkmap64_ba.c in $(SRCS),
which caused this source file to not have a valid Makefile dependency
entry, so blkmap64_ba.o would not get rebuilt when it needed to be.
Also updated the Makefile dependency for the misc directory while
we're at it.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Treat the s_blocks_count field in the superblock as a free block count
(instead of the number of free clusters) for bigalloc file systems.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Commit b0ecb787ef introduced a bug in check_block_uninit(), which is
used by ext2fs_new_block2(). This bug resulted in the block bitmap
for the block group in question not having space reserved for the file
system metadata blocks.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
In ext2fs_add_dir_block() the dblist allocation size was changed to
grow as the number of items in the dblist increases. However, the
error handling in case of allocation failure wasn't changed to match.
Fix the error case to revert to the old allocation size on failure.
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Add the ability to skip zeroing journal blocks on disk. This can
significantly speed up mke2fs with large journals. At worst the
uninitialized journal is only a very short-term risk (if at all),
because the journal will be overwritten on any new filesystem as
soon as any significant amount of data is written to disk, and
the new journal TID would need to match the offset/TID of an old
commit block still left on disk.
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
The write_journal_inode() code is only setting the low 32-bit i_size
for the journal size, even though it is possible to specify a journal
up to 10M blocks in size. Trying to create a journal larger than 2GB
will succeed, but an immediate e2fsck would fail. Store i_size_high
for the journal inode when creating it, and load it upon access.
Use s_jnl_blocks[15] to store the journal i_size_high backup. This
field is currently unused, as EXT2_N_BLOCKS is 15, so it is using
s_jnl_blocks[0..14], and i_size is in s_jnl_blocks[16].
Rename the "size" argument "num_blocks" for the journal creation functions
to clarify this parameter is in units of filesystem blocks and not bytes.
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
O_DIRECT is not defined on OSX. Since direct IO is only a new
optimization and not needed for correct functionality, disable
it if O_DIRECT is unavailable.
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
The BLKFLSBUF and FDFLUSH ioctls are Linux specific, and do not
really have anything to do with __GNUC__ (which is also used on
OS/X and Solaris). Only print these warnings on Linux systems.
statfs64() is deprecated on OSX and generates a deliberate warning.
Fix some other warnings that show up on OSX builds.
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This was reported as "control reaches end of non-void function",
but comparing to other similar functions it should be a void
function. Since it is only declared in the "private" ext2fsP.h
header, it should be OK to change the function prototype.
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Older distros do not define posix_memalign() by default in the
headers. If ext2fs.h is included early in the headers, it is
possible to "#define _XOPEN_SOURCE 600" so that the stdlib.h
header will define it, but if ext2fs.h is included after stdlib.h
there is no posix_memalign() declaration.
Add a posix_memalign() declaration if stdlib.h didn't do it. This
is a bit of a hack for GNU headers, but it works on Linux and OS/X
without problems.
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Fix several types of compiler warnings (unused variables/labels),
uninitialized variables, etc that are hit with gcc -Wall.
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Teach ext2fs_expand_dir() and ext2fs_add_journal_inode() about
allocating blocks when clustered allocation is enabled.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Optimize ext2fs_new_block2() and ext2fs_get_free_blocks2() when
bigalloc is enabled. Also fix the uninitialized block bitmap code so
that it correctly deals clustered allocation.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This patch makes the following changes:
* ext2fs_allocate_block_bitmap() now allocates a bitmap with cluster
granularity for bigalloc file systems. For mke2fs and e2fsck, a
newly added function, ext2fs_allocate_subcluster_bitmap() allocates
a bitmap with block granularity (even for bigalloc file systems).
The newly added function ext2fs_get_bitmap_granularity() will return
the number of bits (log2) of the granularity used by the bitmap.
* The ext2fs_{mark,unmark,test}_block_bitmap2() functions will shift
their passed-in argument by log2(cluster_ganularity) bits right.
This means that the arguments for the single-argument bitmap
functions will be interpreted with block granluarity, since this
minimizes code changes in the rest of the code base.
* The ext2fs_{get,set}_block_bitmap_range() functions will interpret
their arguments in cluster granularity. This is a bit inconsistent,
but the caller of those functions will need to be taught about the
subtleties of clusters for bigalloc file systems.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
The log2 of the ratio of cluster size to block size is far more useful
than just storing the cluster size. So make this change, and then
define basic utility macros: EXT2FS_CLUSTER_RATIO(),
EXT2FS_CLUSTER_MASK(), EXT2FS_B2C(), EXT2FS_C2B(), and
EXT2FS_NUM_B2C().
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Change the EXT2_MAX_BLOCKS_PER_GROUP so that it takes the cluster size
into account. This way we can open bigalloc file systems without
ext2fs_open() thinking that they are corrupt.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
In ext2fs_open() check to make sure the cluster size superblock field
is the same as the block size field when the bigalloc feature is not
set. This is necessary since we will start introducing calculations
based on the cluster size field.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
If $(LINK_INSTALL_FLAGS) is -f instead of -sf, the Makefile's install
rule would not work correctly while installing com_err.h
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit adds support for exporting filesystem into QCOW2 image
format. Like sparse format this saves space, by writing only necessary
(metadata blocks) into image. Unlike sparse image, QCOW2 image is NOT
sparse, hence does not change its size by copying with not-sparse-aware
tools.
New options '-Q' has been added to tell the e2image to use QCOW2 as an
output image format. QCOW2 supports encryption and compression, however
e2image so far does no support such features, however you can still
scramble filenames with '-s' option.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Add functions ext2fs_get_memzero() which will malloc() the memory
using ext2fs_get_mem(), but it will zero the allocated memory afterwards
with memset().
Add function ext2fs_get_arrayzero() which will use calloc() for
allocating and zero-out the array.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
current mkfs.ext4 fails if we tried with the following parameters:
mkfs.ext4 -m 0 -N 16 -O ^has_journal,^resize_inode,^uninit_bg,extent,meta_bg -b 1024 /dev/sdb3
It will cause segfault, but it is caused by another issue. See my
patch "mke2fs: Avoid segmentation fault in
ext2fs_alloc_generic_bmap". And with that patch, the mkfs.ext4 will
fail with the error: /dev/sdb3: Memory allocation failed while setting
up superblock
The reason is that in ext2fs_initialize, we align s_inodes_per_group
to 8, but fails to consider the case that s_inodes_per_group < 8.
So make at least 8 inodes for s_inodes_per_group.
Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
In ext2fs_free_generic_bmap() when we are freeing 64-bit bitmap, we do
call free_bmap() to free backend specific bitmap structures, however we
should also free ext2fs_generic_bitmap structure as well.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
In ext2fs_alloc_generic_bmap() error path, when new bitmap allocation
fails ext2fs_generic_bitmap should be freed, however in current state it
first frees ext2fs_generic_bitmap and then
ext2fs_generic_bitmap->description which is wrong. This commit fix the
free ordering.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
It turns out that it's very hard to calculate overheads in the face of
clustered allocation (bigalloc). This is because multiple metadata
blocks from different block groups can end up in the same allocation
cluster. Calculating the exact overhead requires O(all block bitmaps)
in memory, or O(number of block groups**2) in time. So we will
calculate this at mkfs time and stash it in the superblock.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Check to see if the device supports discard before starting the
progress bar, and then printing an error about inappropriate ioctl for
device (when creating a file system image to a file, for example).
Also, add a function signature in the ext2_io.h header file for
io_channel_discard() and fix an extra, uneeded argument in mke2fs's
call to that function.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This adds the superblock fields needed so that dumpe2fs works and the
code points and renames the superblock fields from describing
fragments to clusters.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This patch adds support for detecting the new 'quota' feature in ext4.
The patch reserves code points for usr and group quota inodes and also
for the feature flag EXT4_FEATURE_RO_COMPAT_QUOTA.
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
User namespace xattrs are generally useful, and I think extN
is the only filesystem requiring a special mount option to
enable them, when xattrs are otherwise available. So this
change sets that mount option into the defaults, via a
mke2fs.conf option.
Note that if xattrs are config'd off, this will lead to a
mostly-harmless:
EXT4-fs (sdc1): (no)user_xattr options not supported
message at mount time...
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
The forced fsck often comes at unexpected and inopportune moments,
and even enterprise customers are often caught by surprise when
this happens. Because a filesystem with an error condition will
be marked as requiring fsck anyway, I submit that the time-based
and mount-based checks are not particularly useful, and that
administrators can schedule fscks on their own time, or tune2fs
the enforced intervals if they so choose. This patch disables the
intervals by default, and I've added a new mkfs.conf option to
turn on the old behavior of random, unexpected, time-consuming
fscks at boot time. ;)
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
After debian bug #192277, debian/rules started making a symlink
to com_err.h in /usr/include. Now I have Fedora bug #550889
for the same issue, and perhaps it's time to make this link
by default, rather than fixing it up in packaging steps?
[ Changed by tytso to remove the explicit -s option; this will default
to creating a hard link by default, which slightly faster. If
people want to use symlinks for all links during the install
process, they can use configure option --enable-symlink-install.
The reason for this change is that some file systems, like AFS,
don't support symlinks, and AFS users complain when they can't build
or install into AFS. So I don't want to use symlinks
unconditionally without a way of switching things back and forth,
and it's easier if we just make all links made during the install
process to be hard links or sym links. ]
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
If the file system has a blocksize less than 64k, then don't use the
extended rec_len encoding, to be consistent with what the kernel will
do.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
ext2fs_zero_block2() allocates static buffer if needed so it
should be freed at last (call it again with 0 args).
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
There was a potential of freeing an uninitialized pointer in
rec.block_buf, which was pointed out by Namhyung Kim <namhyung@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This fixes following build failure when OMIT_COM_ERR is defined:
lib/ext2fs/gen_bitmap.c: In function ‘ext2fs_clear_generic_bitmap’:
lib/ext2fs/gen_bitmap.c:437: error: invalid storage class for function ‘ext2fs_test_clear_generic_bitmap_range’
lib/ext2fs/gen_bitmap.c:559: error: expected declaration or statement at end of input
lib/ext2fs/gen_bitmap.c: In function ‘ext2fs_get_generic_bitmap_end’:
lib/ext2fs/gen_bitmap.c:559: error: expected declaration or statement at end of input
lib/ext2fs/gen_bitmap.c: In function ‘ext2fs_get_generic_bitmap_start’:
lib/ext2fs/gen_bitmap.c:559: error: expected declaration or statement at end of input
lib/ext2fs/gen_bitmap.c: In function ‘ext2fs_unmark_generic_bitmap’:
lib/ext2fs/gen_bitmap.c:559: error: expected declaration or statement at end of input
lib/ext2fs/gen_bitmap.c: In function ‘ext2fs_mark_generic_bitmap’:
lib/ext2fs/gen_bitmap.c:559: error: expected declaration or statement at end of input
lib/ext2fs/gen_bitmap.c: In function ‘ext2fs_test_generic_bitmap’:
lib/ext2fs/gen_bitmap.c:559: error: expected declaration or statement at end of input
make[2]: *** [gen_bitmap.o] Error 1
make[2]: Leaving directory e2fsprogs/lib/ext2fs'
make[1]: *** [all-libs-recursive] Error 1
make[1]: Leaving directory e2fsprogs'
make: *** [all] Error 2
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Flags used during RHEL/Fedora builds lead to a couple type-punning
warnings:
recovery.c: In function 'do_one_pass':
recovery.c:539: warning: dereferencing type-punned pointer will break strict-aliasing rules
./csum.c: In function 'print_csum':
./csum.c:170: warning: dereferencing type-punned pointer will break strict-aliasing rules
The two changes below fix this up.
Note that the csum test binary output changes slightly, but this does
not break any tests.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
In Pass 5 when we are checking block and inode bitmaps we have great
opportunity to discard free space and unused inodes on the device,
because bitmaps has just been verified as valid. This commit takes
advantage of this opportunity and discards both, all free space and
unused inodes.
I have added new set of options, 'nodiscard' and 'discard'. When the
underlying devices does not support discard, or discard ends with an
error, or when any kind of error occurs on the filesystem, no further
discard attempt will be made and the e2fsck will behave as it would
with nodiscard option provided.
As an addition, when there is any not-yet-zeroed inode table and
discard zeroes data, then inode table is marked as zeroed.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
When the device have discard support and simultaneously discard zeroes
data (and it is properly advertised), then we can take advantage of such
behavior in several e2fsprogs tools.
Add new flag CHANNEL_FLAGS_DISCARD_ZEROES for struct_io_channel so
each io_manager can take advantage of this. The flag is properly set
according to BLKDISCARDZEROES ioctl in unix_open.
Also remove old mke2fs_discard_zeroes_data() function and substitute it
with helper which test this flag.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
In order to provide generic "discard" function for all e2fsprogs tools
add a discard function prototype into struct_io_manager. Specific
function for specific io managers can be crated that way.
This commit also creates unix_discard function which uses BLKDISCARD
ioctl to discard data blocks on the block device and bind it into
unit_io_manager structure to be available for all e2fsprogs tools.
Note that BLKDISCARD is still Linux specific ioctl, however other
unix systems may provide similar functionality. So far the
unix_discard() remains linux specific hence is embedded in #ifdef
__linux__ macro.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Creating a 4TB file on a filesystem with the 64bit flag set results in
e2fsck consistently complaining about i_blocks being wrong, with
confusing messages like this:
Inode 29818882, i_blocks is 8388608816, should be 8388608816. Fix? no
That appears to be caused by ext2fs_inode_i_blocks() checking for the
EXT4_FEATURE_RO_COMPAT_HUGE_FILE in the wrong place. Fix it.
Signed-off-by: Justin Maggard <jmaggard10@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
The development branch of e2fsprogs already has a code point assigned
in conflict with EXT2_FLAG_DIRECT_IO. Fix this.
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>
This adds the basic support for Direct I/O to unix_io.c, and adds a
new flag EXT_FLAG_DIRECT_IO which can be passed to ext2fs_open() or
ext2fs_open2() to request Direct I/O support.
Note that device mapper devices in Linux don't support Direct I/O, and
in some circumstances using Direct I/O can actually make performance
*worse*!
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
These patches fix obvious bone-headed mistakes, so e2fsprogs will now
build and mostly work on powerpc. The m_meta_bg, u_mke2fs, and
u_tune2fs tests are still failing, however, so there's still work to do...
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This adds a 64-bit interface for ext2fs_file_size_size() and enhances
it to trunate the file if necessary.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This patch adds a very simple function:
struct ext2_inode *ext2fs_file_get_inode(ext2_file_t file);
which is useful for fuse-ext2 when it needs to read the inode of an
open file.
Signed-off-by: renzo davoli <renzo@cs.unibo.it>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Previously, ext2fs_extent_open2() copied the passed-in inode structure
into the extent handle, and the extent functions modified the copy of
the inode structure if necessary due to extent splits, etc. Change
ext2fs_extent_open2() so that the extent functions use the inode
structure passed into ext2fs_extent_open2(). Otherwise the passed-in
inode structure could become out of date due to changes made by the
extent functions.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
The test now checks to make sure the superblock fields are correctly
aligned and prints them out so they can be manually checked to make
sure they are where we expect them to be.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Add superblock fields which track where and when the first and most
recent file system errors occured. These fields are displayed by
dumpe2fs and cleared by e2fsck.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
We also support for byte-swapping the Next3 fields, although the
current Next3 implementation doesn't support big-endian systems.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
To prevent direct array indexing of fs->group_desc[i] (because the
group_desc may be a different size for different filesystems) make it
an opaque pointer that may only be accessed through the accessor
functions in blknum.c. The type itself is still available in a public
header; if we have a group_desc that we know is one type or another,
it's ok to access its fields directly. This change only prevents us
from indexing off fs->group_desc[i] directly.
Old-style applications who don't want to change their source code can
(as a temporary short-term hack) #define EXT2FS_OLD_32_COMPAT before
including ext2fs.h.
Change the accessors in blknum.c to use ext4fs_group_desc(), a version
of ext2fs_group_desc() which returns a ext4_group_desc pointer.
This simplifies and collapses a fair bit of code in blknum.c
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Use 64-bit interfaces in mke2fs. This should be most most of whats
needed to support creating a 64-bit filesystem.
Signed-off-by: Jose R. Santos <jrs@us.ibm.com>
Signed-off-by: Valerie Aurora Henson <vaurora@redhat.com>
Signed-off-by: Nick Dokos <nicholas.dokos@hp.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This is needed to enable 64-bit mke2fs to work correctly.
Signed-off-by: Jose R. Santos <jrs@us.ibm.com>
Signed-off-by: Valerie Aurora Henson <vaurora@redhat.com>
Signed-off-by: Nick Dokos <nicholas.dokos@hp.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reserve the EXT4_FEATURE_INCOMPAT_DIRDATA feature flag for adding
extra file data in ext2_dir_entry_2 entries.
This changes the on-disk layout in the following way.
Firstly, the ext2_dir_entry_2 file_type field now has a mask: that
limits the "filetype" information to the low 4 bits of this field.
Since these values are sequentially assigned, this allows for up to 7
more filetypes to be assigned. When reading the "filetype" field, the
high 4 bits should be masked off when converting to DT_* filetypes for
userspace.
The high 4 bits of "filetype" are used as a bitmask to register up to
4 different "extended" directory entry fields. Extended data fields
are packed without alignment into the directory entry after the "name"
field in order of increasing bitmask value, for each field where bit
is set. In order to avoid the need to "understand" each of the
extended fields, the first byte of each extended data field holds the
size of that data field (including the size itself), so they can be
skipped if not understood. For fields that change the semantics of
the filesystem it is expected that a separate ROCOMPAT or INCOMPAT
field is registered.
There is a single dirent data type defined currently, for Lustre:
which holds a 128-bit file identifier. It is expected that if there
are 64-bit inode values that this will be assigned the 0x20 value.
Should a need ever arise to use all 4 of the extended dirent data
fields, it would be possible to keep the last bit (0x80) for use as a
multiplexor that stores a 1-byte aggregate data size, then a series of
"<u8_size><u8_type><data>" records in the last extended data record.
It is not expected that this will actually be needed in the lifetime
of ext4.
Signed-off-by: Andreas Dilger <adilger@sun.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reserve the EXT4_INCOMPAT_EA_INODE feature flag for use with
large extended attributes that are stored in a separate inode.
This changes the on-disk format in several ways:
First, replace the e_value_block field with e_value_inum, so that
an xattr entry can reference an external inode. This field is
currently unused, as all of the entries live in the same block.
struct ext2_ext_attr_entry {
__u8 e_name_len; /* length of name */
__u8 e_name_index; /* attribute name index */
__le16 e_value_offs; /* offset in disk block of value */
> __le32 e_value_inum; /* inode in which the value is stored */
__le32 e_value_size; /* size of attribute value */
__le32 e_hash; /* hash value of name and value */
char e_name[0]; /* attribute name */
}
Second, add a flag to the inode that indicates it is using a large
(external) extended attribute. This is needed so that when unlinking
an inode the xattrs will be scanned to unlink the xattr inodes
referenced by the main inode.
Third, for inodes that have a number of xattrs that are larger than
a single block, but not large enough to justify an external inode
(less than 64kB total xattr size, due to e_value_offs limitation)
the ext2_ext_attr_header->h_blocks field can grow beyond a single
block to represent a contiguous allocation of blocks for the xattr.
Signed-off-by: Andreas Dilger <adilger@sun.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
The system header file can end up causing type conflicts, and
including kernel header files is always dodgy/dangerous (and this case
not needed).
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Some devices, notably 4k sector drives, may have a 512 logical
sector size, mapped onto a 4k physical sector size.
When mke2fs is ratcheting down the blocksize for small filesystems,
or when a blocksize is specified on the commandline, we should not
willingly go below the physical sector size of the device.
When a blocksize is specified, we -must- not go below
the logical sector size of the device.
Add a new library function, ext2fs_get_device_phys_sectsize()
to get the physical sector size if possible, and adjust the
logic in mke2fs to enforce the above rules.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
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>
namei.o is also needed by e2initrd_helper.
Long term, if we care about reduced e2fsprogs builds, we need a more
general solution for deciding what .o files are needed for a
particular build. Given that install floppies are going (gone?) the
way the dodo bird, we probably don't care, though.
Addresses-Sourceforge-Bug: #2911433
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
These options allow e2fsprogs to be built using symlinks instead of
hard links, and to be installed using symlinks instead of hard links,
respectively.
Addresses-Sourceforge-Bug: #1436294
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This fixes a long-standing botch in the com_err library, and solves a
regression test problem for libss that gets tickled by source code
management systems (like Perforce) that don't preserve CRLF line
endings with fidelity.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
When ext2fs_block_iterate2() is called on an extent-mapped file with a
depth > 1, it will erroneously calling the callback function starting
all over again with an offset of logical block 0. It shouldn't do
this, and it cases mke2fs to become very slow when creating files with
very large journals.
Fix this.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This is the userspace side of Jiaying's EOFBLOCKS patch. With
Aneesh's patches for .33, Jiaying's patch, and this one, xfstests
013/fsstress (even with direct IO enabled) has held up through many
runs.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
The 64-bit patches broke compiles on big endian systems. In addition
the block group checksum test was failing, due to bugs in both the
test case and the checksum code itself. This commit addresses these
problems.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Rawhide now has libreadline.so.6 ... add it to the ever-expanding
list of libs to look for.
Unfortunately without commit 06ef971be5
this fails in a rather cryptic way.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
If a 64-bit bitmap is passed to a 32-bit bitmap function, add some
checks to make sure that we print a useful error message so we can
better catch potential problems.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
When trying to find the best place for the inode table in the last
flex block group, use the true size for the flex_bg's portion of the
inode table instead of the worst case required size of the inode table
fragment if the file system is resized. This fixes a corner case
where if the size of the filesystem is just big enough that there is
only room for a single block group in the last flex_bg, and that
partial block group is too small for the full portion of the inode
table, the inode table is placed in the very first block group:
Group 64: (Blocks 2097152-2099199) [INODE_UNINIT, ITABLE_ZEROED]
Checksum 0xd305, unused inodes 8080
Block bitmap at 2097152 (+0), Inode bitmap at 2097168 (+16)
Inode table at 8626-9130 (+4292878770)
^^^^^^^^^
Thanks to Vyacheslav Dubeyko for pointing this out.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Unfortunately, texi2html gratuitously changed its behavior of where
its output html files are placed when the -split_chapter is in effect.
(First it was in a subdirectory; then it was in the current directory;
now it's back to putting the output html files in a subdirectory
again.)
Support either way of doing things since the texi2html team seems to
be indecisive...
Addresses-Debian-Bug: #552934
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Don't byte-swap the block number when setting i_block[x], since the
write_inode function will take of byte swapping the inode.
The phys_blk parameter contains an input parameter in the SET_BMAP
case, so it must be passed to ext2fs_bmap2() from the legacy function
ext2fs_bmap().
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Linux <= 2.6.19 contained a bug in the /proc/swaps code where the
header would not be displayed (the first line).
This issue has been reported by Mike Frysinger for swapon(8).
Signed-off-by: Karel Zak <kzak@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
The f_illitable_flexbg test was failing on ppc, because
e2fsck_move_ext3_journal is doing a direct memcmp of i_block with
s_jnl_blocks, and failing.
This is because we don't swap extent data on read from disk; rather
we do it when we access the extents. However, ext2fs_swap_super
was swapping s_jnl_blocks unconditionally, so these didn't match.
Looks like we need to treat s_jnl_blocks the same as i_block, and
swap it on access, not on read. Except for the last i_size bit...
Reviewed-by: Andreas Dilger <adilger@sun.com>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Clear the function pointer for readline_shutdown() so that if libss is
linking against a readline library which doesn't supply a
readline_shutdown() function, ss_delete_invocation() won't seg fault.
Thanks to Solar Designer <solar@openwall.com> for reporting this
problem to me.
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>
The ext2fs_bg_flag* functions were confusing.
Currently we have this:
void ext2fs_bg_flags_set(ext2_filsys fs, dgrp_t group, __u16 bg_flags);
void ext2fs_bg_flags_clear(ext2_filsys fs, dgrp_t group,__u16 bg_flags);
(_set (unused) sets exactly bg_flags; _clear clears all and ignores bg_flags)
and these, which can twiddle individual bits in bg_flags:
void ext2fs_bg_flag_set(ext2_filsys fs, dgrp_t group, __u16 bg_flag);
void ext2fs_bg_flag_clear(ext2_filsys fs, dgrp_t group, __u16 bg_flag);
A better interface, after the patch below, is just:
ext2fs_bg_flags_zap(fs, group) /* zeros bg_flags */
ext2fs_bg_flags_set(fs, group, flags) /* adds flags to bg_flags */
ext2fs_bg_flags_clear(fs, group, flags) /* clears flags in bg_flags */
and remove the original ext2fs_bg_flags_set / ext2fs_bg_flags_clear.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
If the RO compat HUGE_FILE feature flag is set, but the inode's
HUGE_FILE_FL flag is not set, we should still pay attention to the
high 32 bits of the i_blocks filed.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Commit 1d9b818: dumpe2fs: Print more information about the inline journal
caused dumpe2fs to use ext2fs_file_open2(). Previously the file_io
functions were only used by debugfs, so if debugfs was disabled,
file_io was not built. Now that dumpe2fs is also using file_io, we
need to build it unconditionally.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit forces the use of the system-provided blkid or uuid header
files if we are using the system-provided blkid or uuid libraries.
This avoids using the in-tree header files with the system libraries.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Blocks per group and group desc count are both 32-bit; multiplied they
produce a 32-bit quantity which overflowed.
Signed-off-by: Valerie Aurora Henson <vaurora@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
The x86 BT assembly instructure can overshoot the end of a bit array
when testing a bit at the end of the bit array, even if it never needs
to look at those memory locations. This can cause a spurious
segmentation fault. If we allocate a little extra memory, it avoids
this problem. See:
http://faydoc.tripod.com/cpu/bt.htm
This doesn't happen on Linux, probably because of the glibc's malloc()
function works, but apparently it's a major problem on the *BSD
operating systems.
Addresses-Sourceforge-Bug: #2328708
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
The Linux kernel modules could be compressed, it means modules.dep
parser in libblid has to support .ko.gz extension too.
(Note, I've talked about this problem with Jon Masters and his
suggestion is to exec(/sbin/modinfo) rather than directly parse
modules.dep. BTW, the modules.dep file is deprecated.)
Address-Red-Hat-Bug: #518572
Signed-off-by: Karel Zak <kzak@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
For filesystms that have the extent feature enabled, we need to grab
the use EXT2_IOC_GETFLAGS so that we don't accidentally end up trying
to request clearing the EXT2_EXTENT_FL, which is not supported and
causes the tune2fs -j error out.
Also fix the error returning in ext2fs_add_journal_inode() so it
returns a proper error code if the fstat() or ioctl() calls fail.
Addresses-Launchpad-bug: #416648
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
With 64-bit file systems, mke2fs can take a long time to do things
other than write inode tables. I exported the mke2fs numeric progress
meter and used it for allocating group tables and the final file
system flush.
Signed-off-by: Valerie Aurora (Henson) <vaurora@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Several routines in lib/ext2fs/blknum.c:
ext2fs_bg_free_blocks_count()
ext2fs_bg_free_inodes_count()
ext2fs_bg_used_dirs_count()
ext2fs_bg_itable_unused()
and their _set() counterparts, operate as if they are dealing with
blk64_t quantities, but they should be dealing with __u32 counts
instead.
Signed-off-by: Nick Dokos <nicholas.dokos@hp.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Initial design was done by Theodore Ts'o; implementation was fleshed
out by Valerie Aurora Henson. Also includes some fixes from Nick Dokos.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Valerie Aurora Henson <vaurora@redhat.com>
Signed-off-by: Nick Dokos <nicholas.dokos@hp.com>
We are using a signed int to store a block number in
ext2fs_allocate_group_table. We don't actually do any computation or
comparisons using it, so it shouldn't cause any bugs, but it's
technically incorrect, and it's possible an overly clever compiler
might do something wrong with it.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Avoiding inserting a new extent if it is possible to merge the new
block to the beginning or the end of the previous or next extent.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Comment out less common debugging printf's, and fix some type
warnings. Add high-level debugging printf's for ext2fs_extent_goto(),
ext2fs_extent_insert(), ext2fs_extent_delete(), ext2fs_extent_replace()
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Commit 0dc291611 introduced a regression when unmapping the first
block in an extent. This caused e2fsck -fD to corrupt large
directories if the directory has to shrink by more than one block.
The problem was set_bmap should only go to a next leaf when setting a
first block in an extent, and not when it is unmapping the first block
in an extent.
Addresses-Debian-Bug: #537510
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
The tst_csum test is now part of csum.c, so there isn't a separate
tst_csum.c file that should be listed as one of the source files in
lib/ext2fs.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
In the case where we ext2fs_extent_set_bmap() is replacing the block
mapping at the beginning of an already-existing extent, insert a new
extent if necessary before shrinking an existing extent, to avoid data
loss if the disk is full.
This mostly addresses the problem described in Red Hat Bugzilla's
statistics are still wrong, but at least the files on the filesystem
are not corrupted. If there is a failure during the
inode_scan_and_fix pass, the simplest thing to do may be to tell the
user to run e2fsck -fy.
Addresses-Red-Hat-Bug: #510379
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Optimize ext2fs_test_block_bitmap_range() and add a new function,
ext2fs_test_inode_bitmap_range(), which works the same way as
ext2fs_block_bitmap_range() but for inode bitmaps. It's needed for
some code in the development branch, so let's drop it into the maint
branch to make life easier in the future.
Signed-off-by: Kazuya Mio <k-mio@sx.jp.nec.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Commit 53422e moved the new extent insertion in
ext2fs_extent_set_bmap() prior to the modification of the original
extent, but the insert function left the handle pointing to the new
extent. This left us modifying the -new- extent, instead of the
original one, and winding up with a corrupt extent tree something
like:
BLOCKS:
(0-1):588791-588792, (0):588791
We need to move back to the previous extent prior
to modification, if we inserted a new one.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Some people don't want to see the concise "kernel-style" make output.
This configure option allows build engines that want to see the full
set of commands executed by the makefile to get what they want. Most
people will find this more distracting than useful, unless they need
to debug the Makefiles.
(It is not necessary to rerun configure to enable this verbose make
output temprarily; if a developer wants to do a quick debug of a
directory's makefile, he or she can simply edit the definition of the
$(E) and $(Q) variables in the Makefile; instructions can be found in
the MCONFIG file which is included in at the beginning of every
Makefile.)
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
The e2fsprogs makefiles were using the same Makefile variable
LIBCOM_ERR for the link-line arguments as well as the dependencies.
Since LIBCOM_ERR can now include non-file arguments such as
"-lpthread", we need to use a separate DEPLIBCOM_ERR variable that
only has build file dependencies.
Do the same thing for STATIC_LIBCOM_ERR and PROFILED_LIBCOM_ERR.
Addresses-Sourceforge-Patches: #2813809
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Some distributions don't like installing uuidd setuid or setgid. So
if the setuid or setigid bit is not set with uuidd, and the current
process does not have write access to the UUIDD work directory, don't
try running uuidd, since it won't work properly.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
If for some reason the uuidd daemon or the process calling uuidd
exited unexpectely, the read_all() function would end up looping
forever, either in uuidd or in libuuid. Fix this terminating the loop
if no data can be read after five tries to read from the file
descriptor.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
When closing all of the file descriptors before starting uuidd, make
sure file descriptors 0, 1, and 2 are reserved by opening /dev/null.
This prevents strange bugs caused by assumptions regarding file
descriptors <= 2 as being special.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
ext2fs_validate_entry would read beyond the end of the block to get
dirent->rec_len for certain arguments (like if blocksize ==
final_offset). This patch adds a check so that doesn't happen, and
changes the types of the arguments to avoid a compiler warning.
Signed-off-by: Nic Case <number9652@yahoo.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Previously e2fsprogs interpreted 0 for a rec_len of 65536 (which could
occur if the directory block is completely empty in 64k blocksize
filesystems), while the kernel interpreted 65535 to mean 65536. The
kernel will accept both to mean 65536, and encodes 65535 to be 65536.
This commit changes e2fsprogs to match.
We add the encoding agreed upon for 128k and 256k filesystems, but we
don't enable support for these larger block sizes, since they haven't
been fully tested.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
I noticed that neither the journal nor resize inodes have
i_extra_isize set post-mkfs; while this isn't likely
to be a big problem, I think the below patch tidies
it up.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
The ext2_extent_handle only has a struct ext2_inode allocated on
it, and the same amount copied into it in that same function,
but in update_path() we're possibly writing out more than that -
for example 256 bytes, from that address. This causes uninitialized
memory to get written to disk, overwriting the parts of the
inode past the osd2 member (the end of the smaller structure).
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Each time an extent handle is opened and closed, if the inode has an
extent tree which does not fit in the inode's i_block structure, a
filesystem block buffer was not getting released. Since e2fsck opens
an extent handle for every inode using extents, this can translate to
a very large amount of memory getting lost.
Thanks to Henrik 'Mauritz' Johnson for discovering and pointing out
this leak, which he ran into while running the "rdump" command in
debugfs.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Added 64-bit mkjournal.c interface. Needed to zero inode tables.
Signed-off-by: Jose R. Santos <jrs@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Add new ext2fs_descriptor_block_loc2() routine that takes blk64_t as
an input.
Signed-off-by: Jose R. Santos <jrs@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
The new ext2fs_super_and_bgd_loc2() function has some changes aside
from just blk64_t support. Lets make sure that the interfaces are
sane by adding libext2fs support early to get the new API tested here.
Signed-off-by: Jose R. Santos <jrs@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Add new ext2fs_super_and_bgd_loc2() that returns blk64_t pointers.
The function now returns the number of blocks used by super block and
group descriptors since with flex_bg, it can no longer be assumed that
bitmaps and inode tables still resided within the block group.
Signed-off-by: Jose R. Santos <jrs@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>