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In the problem above I've spend several hours waiting for the issue to
appear, only to had the 'luck' that it was found in a file whose name was
256 bytes in length, resulting in the write to fail. Closer examination
showed that the buffer to store the path was 256 bytes in length, but this
buffer also includes /tmp and the read/write suffix and should be able to
contain a filename which is up to 255 bytes (NAME_MAX in linux/limits.h)
in size which is a bad fit. So that array is modified to FILENAME_MAX
(stdio_lim.h) and some checking is added to truncate the filename should
it cause an overflow.
The following log shows the first patch in action (see the correct seed),
and shows why this third patch is needed:
<quote>
integck: File Data:
integck: Offset: 0 Size: 1 Seed: 5008310 R.Off: 0
integck: 1 writes
integck: ============================================
integck: Write Info:
integck: Offset: 0 Size: 1 Seed: 5008310 R.Off: 0
integck: Offset: 0 Size: 1 Seed: 8246352 R.Off: 0
integck: Offset: 0 Size: 1 Seed: 5078796 R.Off: 0
integck: Offset: 0 Size: 1 Seed: 2267087 R.Off: 0
integck: Offset: 0 Size: 1 Seed: 3602680 R.Off: 0
integck: 5 writes or truncations
integck: ============================================
integck: Saving /tmp/yqcnfygfitaatyeyvffrguegcdttamcnyhowhgieljfuxfipiljsjcbluaeaghwyinkggommsbwnmvekihgnwgiibccpbwfrpxuxwkmnyghnutrudienngxwgorudbskedaaekiuiyqksfazrwzfwbfhzjjqoiulebtlpbfiuffmsnguqkjzqjqizimsmhbqqagaebjdhqwmzdxghiavtcxubegawlgtvstuqurkurpnrckjfkgostdtpg.integ.sav.readn
integck: error!: condition 'w_fd != -1' failed in save_file() at integck.c:1445
integck: error 36 (File name too long)
</quote>
Signed-off-by: Elie De Brauwer <eliedebrauwer@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
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the errors
See my problem description int the previous commit, the point is that integck
in file_check_data reads a buffer, and then checks if the data is correct, it
will do a seek(0), and reread from the same fd. The point is that in the
scenario I observed integck failed (due to a buffer mismatch) but the it saved
(and what was in flash) was actually correct. So I modified this function to
dump the buffers to stderr at the moment an error is found.
Signed-off-by: Elie De Brauwer <eliedebrauwer@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
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<quote>
integck: File Data:
integck: Offset: 0 Size: 196 Seed: 5999877 R.Off: 0
integck: Offset: 196 Size: 33 Seed: 4160795 R.Off: 0
integck: Offset: 229 Size: 1252 Seed: 8070052 R.Off: 0
integck: Offset: 1481 Size: 612 Seed: 4160795 R.Off: 1285
integck: Offset: 2093 Size: 6 Seed: 6946586 R.Off: 0
integck: Offset: 2099 Size: 536 Seed: 4160795 R.Off: 1903
integck: Offset: 2635 Size: 1562 Seed: 9845455 R.Off: 0
integck: Offset: 4197 Size: 80 Seed: 702818 R.Off: 0
integck: Offset: 4277 Size: 115 Seed: 9845455 R.Off: 1642
integck: 9 writes
integck: ============================================
integck: Write Info:
integck: Offset: 826 Size: 357 Seed: 5908448 R.Off: 0
integck: Offset: 4197 Size: 80 Seed: 702818 R.Off: 0
...
</quote>
And I would expect the file data listing to include at offset 826 something
with a size of 357 and a seed of 5908448. Clearly it is not there (which
is already extremely confusing). The point is that file_write_info first
updates the raw_write, then verifies the data (passing the new write)
and only after that updates the write structure. But in file_check_data
only the newly written data is verified (passed as an argument) whilst
the save_file() function to dump the file uses the raw_writes to recreate
the written data (while raw_writes is only updated after after this check
would have succeeded). Several lines to say that in this patch the verify
only gets called _after_ the datastructures are updated.
Signed-off-by: Elie De Brauwer <eliedebrauwer@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
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We should use the off_t type instead of off64_t or u_int32_t as its
length is controlled by the WITHOUT_LARGEFILE flag.
Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
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The ioctl UBI_IOCATT has been extended with max_beb_per1024 parameter.
This parameter is used for adjusting the "maximum expected number of
bad blocks per 1024 blocks" for each mtd device.
The number of physical erase blocks (PEB) that UBI will reserve for bad
block handling is now:
whole_flash_chipset__PEB_number * max_beb_per1024 / 1024
This means that for a 4096 PEB NAND device with 3 MTD partitions:
mtd0: 512 PEB
mtd1: 1536 PEB
mtd2: 2048 PEB
the commands:
ubiattach -m 0 -d 0 -b 20 /dev/ubi_ctrl
ubiattach -m 1 -d 1 -b 20 /dev/ubi_ctrl
ubiattach -m 2 -d 2 -b 20 /dev/ubi_ctrl
will attach mtdx to UBIx and reserve:
80 PEB for bad block handling on UBI0
80 PEB for bad block handling on UBI1
80 PEB for bad block handling on UBI2
=> for the whole device, 240 PEB will be reserved for bad block
handling.
This may seems a waste of space, but as far as the bad blocks can appear
every where on a flash device, in the worst case scenario they can
all appear in one MTD partition.
So the maximum number of expected erase blocks given by the NAND
manufacturer should be reserve on each MTD partition.
Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
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First, the top-level Makefile should not tell git to ignore sub-level
.gitignore files.
Second, add simple .gitignores to ignore the executables generated under
the various `tests' subdirectories.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Artem Bityutskiy <dedekind1@gmail.com>
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The ubi-utils/src/ subdir is tossed as it just complicates things for no
real gain. The dictionary.h header is relocated to the ubi-utils/include/
since other headers in there need it.
The top level clean is replaced with a `find -delete` on objects, so it
might prune more than necessary, but many projects now do this sort of
thing and no one complained there.
A "mkdep" helper generates the actual rule, and the variables are used
with "foreach" to expand these automatically.
The tests subdir is updated only to reflect the ubi-utils source move.
Otherwise, it is left untouched as making that non-recursive isn't really
worth the effort.
While we're gutting things, also through in kbuild style output while
building to make things more legible.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Artem Bityutskiy <dedekind1@gmail.com>
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Need to include <linux/fs.h>, at least for my build system. Otherwise,
you can't build the 'tests'.
integck.c: In function ‘parse_mount_options’:
integck.c:2862: error: ‘MS_DIRSYNC’ undeclared (first use in this
function)
integck.c:2862: error: (Each undeclared identifier is reported only once
integck.c:2862: error: for each function it appears in.)
integck.c:2872: error: ‘MS_RELATIME’ undeclared (first use in this
function)
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Currently pcv macro print the error message only if we are not doing power cut
testing or if we have -v flag. But if we run without -v and an error happen
and the error code is not EROFS/EIO, pcv() does not print anything. This patch
makes it print the error message in that case as well.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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The 'file_new()' function should create a file but should not keep it
open. There is a different path to open files and keep them open. This
patch makes 'file_new()' close newly created files.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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This patch makes the directory checking in case of power cut emulation
actually work. There were many bugs. Basically, we cannot rely on anything
unless the directory is marked as clean.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Make -v switch control verbose integck output.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Check the clean data after every emulated power cut, not only when
'create_test_data()'/'update_test_data()' succeed. This required some minor
re-work.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Add a helper 'sync_directory()' function to synchronize directories.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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In 'dir_check()' print name of the directory if we fail to open it.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Currently when we are doing UBIFS power cut emulation testing we assume that
EROFS is returned in case of an emulated power cut event. However, this is
not true and sometimes Linux returns EIO to user-space instead. Namely, this
happens when we are waiting for write-back to finish. Here is a call trace
form kernel 2.6.39-rc7:
Call Trace:
[<ffffffff810aaa77>] filemap_write_and_wait_range+0x78/0xb1
[<ffffffff8110f34d>] vfs_fsync_range+0x38/0xd3
[<ffffffff8110f42b>] generic_write_sync+0x43/0x65
[<ffffffff810ab0c9>] generic_file_aio_write+0xaa/0xf2
[<ffffffffa02224c9>] ubifs_aio_write+0x13a/0x1a1 [ubifs]
[<ffffffff810ed71f>] do_sync_write+0xcb/0x141
[<ffffffff810ee016>] vfs_write+0xb0/0x150
[<ffffffff810ee175>] sys_write+0x48/0x72
[<ffffffff813e0692>] system_call_fastpath+0x16/0x1b
'filemap_fdatawait_range()' returns hard-coded -EIO if a page write-back
happens with whatever error code.
Thus, this patch teaches integck to handle EIO when doing power cut emulation
testing.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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This patch adds -m <mtdnum> option to integck and teaches integck to re-attach
the MTD device to UBI in case of an emulated power cut event. This is needed
for the new UBI power cut and unstable bits emulation infrastructure: when UBI
emulates a power cut the only way to recover form this is to re-attach the MTD
device.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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When we are in power cut mode read all files after re-mounting. This will
check that FS recovery worked well and all files are readable after recovery.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Currently we always verify holes when truncating, but we have -v switch for
this and should do this only if -v was given.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Call 'fsync()' for directories sometimes as well, and check synchronized
directories after re-mount - cound of directory entries has to be correct.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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If 'fsync()' or 'fdatasync()' fail we have to return an error, but we by
mistake were returning 0 (success).
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Currently integck calls 'fsync()' very rarely - with 0.1% probability. Make
this happen more often - with 1% probability.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Allow verification for clean files, i.e. the files which had been fsync()'ed
before the emulated power cut happened.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Make the verify option -v work with power cut emulation option -e. We can
verify all operations except of writing to the file, because of write-back.
Indeed, even if we write successfully, the pages may still be in the page-cache
and if an emulated power cut happens they will be dropped, and our verification
will fail.
I am not 100% sure it is save to verify non-write operation in other FSes, but
only UBIFS has power cut emulation mode now, so we do not really care about
other FSes at this point.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Enable directory entry checking in power cut mode. This means that with this
patch integck will check that all directory entries in the file-system were
created by integck.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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All errors but write errors have corresponding CHECK(), so if something
gets wrong we fail. But in case of I/O errors we do not fail if an
unexpected error happens, which makes it difficult to trace issues.
Inject the errno checking to the pvc macro to make sure we fail if
errno is not EROFS.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Commit 1394a46213e8180e1233ca6d4811e7c77d49b1e0 was a good idea, but it
introduced a segfault - files can be unlinked and 'file->links' is NULL, it is
bad idea to unconditionally dereference it with 'file->links->name'. This patch
introduces a helper function which takes care of the situation with unlinked
files, plus it adds few assertions.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Introduce per-file "clean" flag which tells whether the file is synchronized or
not. This flag is not really used so far.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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In pcv() messages also print the error number - this is useful when
an error happens and it is not because of EROFS.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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This is just a preparation - re-structure 'file_write()' to make one "success"
return point - we'll add synchronization stuff there. Also, while on it, make
it delete the file errored in truncation, not only in write. Also, move
the fsync() call to this function because it is common to all write paths.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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I observes segfaults in integck test, and unfortunately I do not have the core
file to investigate the problem. But I see one possibility for the test to
segfault - it has unbounded recursion. Limit the maximum recursion depth.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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If we are not in power cut testing mode (-p was not used) and we get an
unexpected EROFS, we silently exit. This patch fixes this behavior and make
the test loudly fail instead.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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The test sometimes dies due to SIGBUS because a power cut event happens when
we are writing to an mmap()'ed area. SIGBUS is very difficult to ignore, so
fix the issue simply by avoiding doing 'mmap()' operations when in power cut
testing mode.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Similarly to the previous commit, do not verify operations when in
power-cut testing mode. Again, this is because write-back may fail
meanwhile.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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In 'check_failed()' use the file and line number provided by the CHECK()
macro via the function parameters, rather than using __LINE__ directly.
Otherwise the funtion prints its own line, instead of the line where the
CHECK() failed.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Do not check the file-system when we are in power cut mode. Currently
we still check the FS if we did not encounter any error, and the test
fails sometimes because meanwhile write-back encounters an error and
drops pages. Disable the checking so far. It should be enabled when
we implement the 'clean' flag for files.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Introduce a 'check_tested_fs()' helper function.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Do not print extra messages when unable to re-mount - they are
already printed by the recover function.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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The integck test assumes that if the FS is rootfs then it cannot
re-mount it, otherwise it can. However, this is not true because the
tested FS can be not remountable even if it is not rootfs, e.g., if
'integck' lives on this FS and is executed from it.
This patch improves the integck logic and actually checks wheter it
is possible to re-mount the FS before starting the test.
Also, it makes sure that power cut testing is run only on re-mountable
FS, because we have to be able to clean the "corrupted" state of the
file-system.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Commit 08cfd9d7cacc3c0b97530ad7e13fa8db75e99947 introduced a bug:
we do not re-mount the FS before checking at the first iteration.
This patch fixes the issue.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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-v (verbose) switch is supposed to turn power cut testing error
messages on/off. However, it does not work because the messages
are printed even if -v was not specified. This patch fixes it.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Instead of using rand_r with own seed for operations and rand() with
global state for data it is cleaner to use rand_r with own different
states for these things. This patch eliminates 'srand()' and 'rand()'
usage.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Currently integck uses the same global random generator for everything -
for choosing the operation, generating the data, and for checking. This
makes integck to become stuck sometimes. My guess this is because of
we somehow re-set it back with srand() when checking files.
This patch makes integck use different generators for data and for
choosing operations by using rand_r() with own seed for operations.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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I often need to use gdb to debug integck, or sometimes even attach
already running integck. But when it is compiled with optimizations, it
is nearly impossible to use gdb. Introduce 'debug' target to compile
integck without optimizations.
Additionally, to make the stack backtraces work, add a dirty hack to
integck.c to remove all the static keywords - this turns static
functions to non-static and makes them appear in stack backtraces.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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When -e option is used verify file holes after the truncate
operation. Re-use the existing 'file_check_hole()' function for
this.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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When -e options is used - verify written data. Re-use the existing
file_check_data() function to implement this.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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Improve the test and add -e option which forces integck to verify all
operation it performs. This patch does not implement file writes and
holes operations so far - will be done in subsequent patches.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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This patch teaches the 'CHECK()' macro to print the back-trace in
case of failure which is sometimes very useful for debugging. This
patch also adds a helper function for the 'CHECK()' macro because
otherwise it becomes too large.
Note, since all functions in the test are static, the stack trace
does not really show symbols.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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The integck test does not depend on the "common" directory any more,
so we do not have to have -I ../lib for compilation.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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