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>
Unfortunately, due to Windows' unfortunate design decision to
configure the hardware clock to tick localtime, instead of the more
proper and less error-prone UTC time, many users end up in the
situation where the system clock is incorrectly set at the time when
e2fsck is run.
Historically this was usually due to some distributions having buggy
init scripts and/or installers that didn't correctly detect this case
and take appropriate countermeasures. However, it's still possible,
despite the best efforts of init script and installer authors to not
be able to detect this misconfiguration, usually due to a buggy or
misconfigured virtualization manager or the installer not having
access to a network time server during the installation process. So
by default, we allow the superblock times to be fudged by up to 24
hours. This can be disabled by setting options.accept_time_fudge to
the boolean value of false in e2fsck.conf. The old
options.buggy_init_scripts is left for backwards compatibility.
Since we are now accepting the 24 hour time fudge by default, there is
no longer a need to install an Ubuntu-specific e2fsck.conf file, so we
can remove it.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Fixed a bug where e2fsck would report that last mount time was in the
future when it was really the last write time that was in the future.
Also, since people can't seem to believe that (a) their distribution
has buggy init scripts, or (b) their CMOS/RTC clock or backup battery
is dead, print the incorrect time and the current system time.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Unfortunately, distributions like Ubuntu seem to have buggy init
scripts that run e2fsck and mount the root filesystem before making
sure the system time and time zone is correctly set. As a result, a
filesystem's last write and last mounted time can be set in future.
The buggy_init_scripts configuration option will stop e2fsck from
aborting the boot process, but it also inhibits the superblock times
from getting fixed. This causes resize2fs to refuse to resize the
filesystem, even after running e2fsck on the file system. To deal
with this, we need to fix the superblock write times unconditionally.
Addresses-Launchpad-bug: #373409
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
E2fsck needs to check to see if the backup superblock differs from the
primary superblock. Previously it was doing so by calling
ext2fs_open(), which does a lot of unnecessary work, including reading
all of the backup block group descriptors. Avoid this by reading in
the backup superblock directly.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Move check_resize_inode() out of check_super_block(), since we only
need to test the resize_inode for correctness only if the filesystem
requires checking. This change avoids a lot of I/O operations which
slows down a 1 second boot.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
When we resize online, the primary superblock gets copied to all
the backups, and of course since we're mounted the NEEDS_RECOVERY
flag is set. A subsequent fsck will find the backups have the
NEEDS_RECOVERY flag set while the primary does not, and this
forces a full fsck pass.
I think this flag can be safely ignored in the flag comparisons.
Addresses-Red-Hat-Bugzilla: #471925
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
An deliberately corrupted filesystem with an insanely large
s_first_ino field could cause e2fsck to crash with a seg fault.
Thanks to Eric Sesterhenn for supplying test cases which demonstrated
this issue.
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>
Add a check for the UNINIT_BLOCKS flag set in the last group. The kernel
patch doesn't handle this gracefully, because it assumes there are a full
set of blocks in each group marked UNINIT_BLOCKS. The kernel should be
fixed up, but in the meantime this avoids hitting the problem, and is
more consistent with lazy_bg not marking the last group UNINIT.
Signed-off-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This patch has all the necesary pieces to open and fix filesystems created
with the uninit block group feature.
Signed-off-by: Jose R. Santos <jrs@us.ibm.com>
Signed-off-by: Andreas Dilger <adilger@clusterfs.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Recent e2fsprogs (1.40.3 and higher) fsck compares primary superblock to
backups, and if things differ, it forces a full check. However, the
kernel has a penchant for updating flags the first time a feature is
used - attributes, large files, etc.
This is a bad idea, and we should break the kernel of this habit,
especially for the ext4 feature flags. But for now, let's make e2fsck
avoid forcing a full check and backup except when absolutely
necessary.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
The FLEX_BG feature allows the inode table, block bitmap, and inode
bitmaps to be located anywhere in the filesystem. Update e2fsck and
libext2fs's checking code to recognize this.
Signed-off-by: Jose R. Santos <jrs@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
--
e2fsck/super.c | 14 ++++++++++++--
lib/ext2fs/check_desc.c | 15 +++++++++++++--
2 files changed, 25 insertions(+), 4 deletions(-)
If the primary superblock differs from the backup superblock in
certain key respects, force a full check (if e2fsck was invoked in
preen mode). If the filesystem check passes cleanly, and the
filesystem was opened in read/write mode, then write the primary
superblock to all of the backups.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
If e2fsck adds or deletes any of the feature bitmasks, clear
EXT2_FLAG_MASTER_SB_ONLY so the backup superblocks are updated when
e2fsck finishes.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
The Ubuntu init scripts don't properly set the system time correctly
from hardware clock if the hardware clock is configured to tick local
time instead of GMT time.
Work around this as best as we can by providing an option in
/etc/e2fsck.conf which can be set on Ubuntu systems:
[options]
buggy_init_scripts = 1
Addresses-Debian-Bug: #441093
Addresses-Ubuntu-Bug: #131201
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
The Linux floppy driver is a bit different from the other block device
drivers, in that if the device has been opened with O_EXCL, it disallows
another open(), even if the second open() does not have the O_EXCL flag.
So this patch moves the call to ext2fs_get_device_size() so that if it
returns EBUSY, e2fsck can close the filesystem, retry the device size,
and then reopen it. This rather complicated approach is required since
we need to know the blocksize of the filesystem before we can call
ext2fs_get_device_size().
Addresses Debian Bug: #410569
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
The e2fsprogs and kernel implementation of directory hash tree has a
bug which causes the implementation to be dependent on whether
characters are signed or unsigned. Platforms such as the PowerPC,
Arm, and S/390 have signed characters by default, which means that
hash directories on those systems are incompatible with hash
directories on other systems, such as the x86.
To fix this we add a new flags field to the superblock, and define two
new bits in that field to indicate whether or not the directory should
be signed or unsigned. If the bits are not set, e2fsck and fixed
kernels will set them to the signed/unsigned value of the currently
running platform, and then respect those bits when calculating the
directory hash. This allows compatibility with current filesystems,
as well as allowing cross-architectural compatibility.
Addresses Debian Bug: #389772
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Create new ext2fs library inline functions in order to calculate
the starting and ending blocks in a block group.
Signed-off-by: Eric Sandeen <esandeen@redhat.com>
For loops iterating over all group descriptors, consistently define
first_block and last_block in a way that they are inclusive of the
range, and do not overflow.
Previously on the last block group we did a test of <= first +
dec_blocks; this would actually wrap back to 0 for a total block count
of 2^32-1
Also add handling of last block group which may be smaller.
Signed-off-by: Eric Sandeen <esandeen@redhat.com>
Check to see if the superblock hint for the external journal needs to
be updated, and if so, offer to update it. (Addresses Debian Bug:
#355644)
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Detect if the superblock's last mount field or last write field is in
the future, and offer to fix if so. (Addresses Debian Bug #327580)
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
we changed ext2fs_create_resize_inode to always create the resize inode,
even when s_reserved_gdt_blocks is zero. Mke2fs and e2fsck was calling
ext2fs_create_resize_inode() unconditionally, and depending on
s_reserved_gdt_blocks to be zero, instead of explicitly checking the
resize_inode feature.
as well as the filesystem-wide inode and block free counts. If any of the
free counts is too large, force a full filesystem check. (Addresses
Debian Bug #291571)
enabled, but s_reserved_gdt_blocks is zero and there is no double indirect
block in the resize inode. If there are no blocks reserved for on-line
expansion, there is no need for the DIND block to be allocated in the resize
inode.
Theodore Ts'o