Commit Graph

107 Commits

Author SHA1 Message Date
Thomas Gleixner 2b27bdcc20 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 336
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation this program is
  distributed in the hope that it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details you should have received a copy of the gnu general
  public license along with this program if not write to the free
  software foundation inc 51 franklin st fifth floor boston ma 02110
  1301 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 246 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190530000436.674189849@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:37:07 +02:00
Sascha Hauer a65d10f3ce ubifs: Drop unnecessary setting of zbr->znode
in dbg_walk_index ubifs_load_znode is used to load the znode behind
a zbranch. ubifs_load_znode links the new child znode to the zbranch,
so doing it again is unnecessary.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
2019-05-07 21:58:32 +02:00
Sascha Hauer 5125cfdff1 ubifs: Format changes for authentication support
This patch adds the changes to the on disk format needed for
authentication support. We'll add:

* a HMAC covering super block node
* a HMAC covering the master node
* a hash over the root index node to the master node
* a hash over the LPT to the master node
* a flag to the filesystem flag indicating the filesystem is
  authenticated
* an authentication node necessary to authenticate the nodes written
  to the journal heads while they are written.
* a HMAC of a well known message to the super block node to be able
  to check if the correct key is provided

And finally, not visible in this patch, nevertheless explained here:

* hashes over the referenced child nodes in each branch of a index node

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
2018-10-23 13:48:29 +02:00
Richard Weinberger 2e52eb7446 ubifs: Rework ubifs_assert()
With having access to struct ubifs_info in ubifs_assert() we can
give more information when an assert is failing.
By using ubifs_err() we can tell which UBIFS instance failed.

Also multiple actions can be taken now.
We support:
 - report: This is what UBIFS did so far, just report the failure and go
   on.
 - read-only: Switch to read-only mode.
 - panic: shoot the kernel in the head.

Signed-off-by: Richard Weinberger <richard@nod.at>
2018-08-15 00:25:21 +02:00
Richard Weinberger 6eb61d587f ubifs: Pass struct ubifs_info to ubifs_assert()
This allows us to have more context in ubifs_assert()
and take different actions depending on the configuration.

Signed-off-by: Richard Weinberger <richard@nod.at>
2018-08-15 00:25:21 +02:00
Colin Ian King 6a258f7d0f ubifs: Fix cut and paste error on sb type comparisons
The check for the bad node type of sb->type is checking sa->type
and not sb-type. This looks like a cut and paste error. Fix this.

Detected by PVS-Studio, warning: V581

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2017-05-08 20:48:41 +02:00
Hyunchul Lee 33fda9fa9f ubifs: Fix debug messages for an invalid filename in ubifs_dump_inode
instead of filenames, print inode numbers, file types, and length.

Signed-off-by: Hyunchul Lee <cheol.lee@lge.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2017-03-30 09:27:53 +02:00
Hyunchul Lee e328379a18 ubifs: Fix debug messages for an invalid filename in ubifs_dump_node
if a character is not printable, print '?' instead of that.

Signed-off-by: Hyunchul Lee <cheol.lee@lge.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2017-03-30 09:27:47 +02:00
Richard Weinberger f4f61d2cc6 ubifs: Implement encrypted filenames
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: David Gstir <david@sigma-star.at>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-12-12 23:07:38 +01:00
Andreas Gruenbacher 1112018cef ubifs: ubifs_dump_inode: Fix dumping field bulk_read
The wrong field (xattr) is dumped here due to a copy-and-paste error.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2016-05-24 15:29:44 +02:00
shengyong 8f6983abe3 UBIFS: call dbg_is_power_cut() instead of reading c->dbg->pc_happened
Call dbg_is_power_cut() to emulate power cut instead of reading
c->dbg->pc_happened. Otherwise, the function becomes dead code.

Signed-off-by: Sheng Yong <shengyong1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2015-10-03 20:40:21 +02:00
Sheng Yong 235c362bd0 UBIFS: extend debug/message capabilities
In the case where we have more than one volumes on different UBI
devices, it may be not that easy to tell which volume prints the
messages.  Add ubi number and volume id in ubifs_msg/warn/error
to help debug. These two values are passed by struct ubifs_info.

For those where ubifs_info is not initialized yet, ubifs_* is
replaced by pr_*. For those where ubifs_info is not avaliable,
ubifs_info is passed to the calling function as a const parameter.

The output looks like,

[   95.444879] UBIFS (ubi0:1): background thread "ubifs_bgt0_1" started, PID 696
[   95.484688] UBIFS (ubi0:1): UBIFS: mounted UBI device 0, volume 1, name "test1"
[   95.484694] UBIFS (ubi0:1): LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes
[   95.484699] UBIFS (ubi0:1): FS size: 30220288 bytes (28 MiB, 238 LEBs), journal size 1523712 bytes (1 MiB, 12 LEBs)
[   95.484703] UBIFS (ubi0:1): reserved for root: 1427378 bytes (1393 KiB)
[   95.484709] UBIFS (ubi0:1): media format: w4/r0 (latest is w4/r0), UUID 40DFFC0E-70BE-4193-8905-F7D6DFE60B17, small LPT model
[   95.489875] UBIFS (ubi1:0): background thread "ubifs_bgt1_0" started, PID 699
[   95.529713] UBIFS (ubi1:0): UBIFS: mounted UBI device 1, volume 0, name "test2"
[   95.529718] UBIFS (ubi1:0): LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes
[   95.529724] UBIFS (ubi1:0): FS size: 19808256 bytes (18 MiB, 156 LEBs), journal size 1015809 bytes (0 MiB, 8 LEBs)
[   95.529727] UBIFS (ubi1:0): reserved for root: 935592 bytes (913 KiB)
[   95.529733] UBIFS (ubi1:0): media format: w4/r0 (latest is w4/r0), UUID EEB7779D-F419-4CA9-811B-831CAC7233D4, small LPT model

[  954.264767] UBIFS error (ubi1:0 pid 756): ubifs_read_node: bad node type (255 but expected 6)
[  954.367030] UBIFS error (ubi1:0 pid 756): ubifs_read_node: bad node at LEB 0:0, LEB mapping status 1

Signed-off-by: Sheng Yong <shengyong1@huawei.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2015-03-25 11:08:41 +02:00
Artem Bityutskiy fb4325a3d9 UBIFS: add a couple of extra asserts
... to catch possible memory corruptions.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2015-01-28 16:09:32 +01:00
Richard Weinberger 443b39cdd5 UBIFS: Fix trivial typo in power_cut_emulated()
s/withing/within/

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-09-30 09:29:44 +03:00
hujianyang 4b1a43eab1 UBIFS: Align the dump messages of SB_NODE
I found the dump messages of UBIFS_SB_NODE is not aligned. This
patch remove the extra space from the line which is retracted.

Signed-off-by: hujianyang <hujianyang@huawei.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-09-26 13:33:41 +03:00
hujianyang dac3698147 UBIFS: Fix dump messages in ubifs_dump_lprops
Function ubifs_read_one_lp will not set @lp and returns
an error when ubifs_read_one_lp failed. We should not
perform ubifs_dump_lprop in this case because @lp is not
initialized as we wanted.

Signed-off-by: hujianyang <hujianyang@huawei.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-05-27 15:05:23 +03:00
Cody P Schafer bb25e49ff8 fs/ubifs: use rbtree postorder iteration helper instead of opencoding
Use rbtree_postorder_for_each_entry_safe() to destroy the rbtree instead
of opencoding an alternate postorder iteration that modifies the tree

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Artem Bityutskiy <dedekind1@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-23 16:37:03 -08:00
Mats Kärrman 58a4e23703 UBIFS: correct data corruption range
With power-cut emulation, it is possible that sometimes no data at all is
corrupted and that confusing messages are printed due to errors in the
computation of data corruption range.

[1] The start of the range should be [0..len-1], not [0..len].
[2] The end of the range should always be at least 1 greater than the start.

Signed-off-by: Mats Karrman <mats.karrman@tritech.se>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2013-10-26 11:33:38 +01:00
Mats Kärrman c23e9b75cc UBIFS: remove invalid warn msg with tst_recovery enabled
Signed-off-by: Mats Karrman <mats.karrman@tritech.se>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2013-08-16 16:42:08 +03:00
Akinobu Mita 3d251a5b9e UBIFS: rename random32() to prandom_u32()
Use more preferable function name which implies using a pseudo-random
number generator.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2013-01-15 15:45:27 +02:00
Akinobu Mita cdd9fa8de6 ubifs: use prandom_bytes
This also converts filling memory loop to use memset.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Artem Bityutskiy <dedekind1@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: David Laight <david.laight@aculab.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Eilon Greenstein <eilong@broadcom.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Robert Love <robert.w.love@intel.com>
Cc: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-12-17 17:15:26 -08:00
Linus Torvalds 782c3fb22b No big changes for 3.7 in UBIFS:
* Error reporting and debug printing improvements
 * Power cut emulation fixes
 * Minor cleanups
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Merge tag 'upstream-3.7-rc1' of git://git.infradead.org/linux-ubifs

Pull ubifs changes from Artem Bityutskiy:
 "No big changes for 3.7 in UBIFS:
   - Error reporting and debug printing improvements
   - Power cut emulation fixes
   - Minor cleanups"

Fix trivial conflict in fs/ubifs/debug.c due to the user namespace
changes.

* tag 'upstream-3.7-rc1' of git://git.infradead.org/linux-ubifs:
  UBIFS: print less
  UBIFS: use pr_ helper instead of printk
  UBIFS: comply with coding style
  UBIFS: use __aligned() attribute
  UBIFS: remove __DATE__ and __TIME__
  UBIFS: fix power cut emulation for mtdram
  UBIFS: improve scanning debug output
  UBIFS: always print full error reports
  UBIFS: print PID in debug messages
2012-10-02 20:47:48 -07:00
Eric W. Biederman 39241beb78 userns: Convert ubifs to use kuid/kgid
Cc: Artem Bityutskiy <dedekind1@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2012-09-21 03:13:36 -07:00
Artem Bityutskiy 6b38d03f48 UBIFS: use pr_ helper instead of printk
Use 'pr_err()' instead of 'printk(KERN_ERR', etc.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-08-31 17:32:57 +03:00
Artem Bityutskiy 79fda5179a UBIFS: comply with coding style
Join all the split printk lines in order to stop checkpatch complaining.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-08-31 17:32:57 +03:00
Artem Bityutskiy 8089ed7928 UBIFS: fix power cut emulation for mtdram
The power cut emulation did not work correctly because we corrupted more than
one max. I/O unit in the buffer and then wrote the entire buffer. This lead to
recovery errors because UBIFS complained about corrupted free space. And this
was easily reproducible on mtdram because max. write size is very small there
(64 bytes), and we could easily have a 1KiB buffer, corrupt 128 bytes there,
and then write the entire buffer.

The fix is to corrupt max. write size bytes at most, and write only up to the
last corrupted max. write size chunk, not the entire buffer.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-08-31 17:32:38 +03:00
Artem Bityutskiy db0f896906 UBIFS: always print full error reports
Even when we are emulating power cuts, otherwise it is difficult to investigate
failures during emulated power cuts testing.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-08-22 17:41:44 +03:00
Artem Bityutskiy 06bef9451a UBIFS: add debugfs knob to switch to R/O mode
This patch adds another debugfs knob which switches UBIFS to R/O mode.
I needed it while trying to reproduce the 'first log node is not CS node'
bug. Without this debugfs knob you have to perform a power cut to repruduce
the bug. The knob is named 'ro_error' and all it does is it sets the
'ro_error' UBIFS flag which makes UBIFS disallow any further writes - even
write-back will fail with -EROFS. Useful for debugging.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com>
2012-07-20 10:27:25 +03:00
Brian Norris 2d4cf5ae12 UBIFS: correct usage of IS_ENABLED()
Commit "818039c UBIFS: fix debugfs-less systems support" fixed one
regression but introduced a different regression - the debugfs is now always
compiled out. Root cause: IS_ENABLED() arguments should be used with the
CONFIG_* prefix.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-06-27 14:22:15 +03:00
Artem Bityutskiy 818039c7d5 UBIFS: fix debugfs-less systems support
Commit "f70b7e5 UBIFS: remove Kconfig debugging option" broke UBIFS and it
refuses to initialize if debugfs (CONFIG_DEBUG_FS) is disabled. I incorrectly
assumed that debugfs files creation function will return success if debugfs
is disabled, but they actually return -ENODEV. This patch fixes the issue.

Reported-by: Paul Parsons <lost.distance@yahoo.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Tested-by: Paul Parsons <lost.distance@yahoo.com>
2012-06-07 10:43:54 +03:00
Richard Weinberger b36a261e8c UBI: Kill data type hint
We do not need this feature and to our shame it even was not working
and there was a bug found very recently.
	-- Artem Bityutskiy

Without the data type hint UBI2 (fastmap) will be easier to implement.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-05-20 20:25:59 +03:00
Artem Bityutskiy a6aae4dd0f UBIFS: get rid of dbg_err
This patch removes the 'dbg_err()' macro and we now use 'ubifs_err()' instead.
The idea of 'dbg_err()' was to compile out some error message to make the
binary a bit smaller - but I think it was a bad idea.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-05-16 20:11:23 +03:00
Artem Bityutskiy f70b7e52aa UBIFS: remove Kconfig debugging option
Have the debugging stuff always compiled-in instead. It simplifies maintanance
a lot.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-05-16 19:53:46 +03:00
Artem Bityutskiy edf6be245f UBIFS: rename dumping functions
This commit re-names all functions which dump something from "dbg_dump_*()" to
"ubifs_dump_*()". This is done for consistency with UBI and because this way it
will be more logical once we remove the debugging sompilation option.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-05-16 19:15:56 +03:00
Artem Bityutskiy 7c46d0ae29 UBIFS: get rid of dbg_dump_stack
In case of errors we almost always need the stack dump - it makes no sense
to compile it out. Remove the 'dbg_dump_stack()' function completely.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-05-16 19:04:54 +03:00
Artem Bityutskiy b06283c7df UBIFS: make the dbg_lock spinlock static
Remove the usage of the 'dbg_lock' spinlock from 'dbg_err()' and make
it static.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-02-29 16:10:20 +02:00
Artem Bityutskiy 16c395ca72 UBIFS: increase dumps loglevel
Most of the time we use the dumping function to dump something in case
of error. We use 'KERN_DEBUG' printk level, and the drawback is that users
do not see them in the console, while they see the other error messages
in the console. The result is that they send bug reports which does not
contain a lot of useful information. This patch changes the printk level
of the dump functions to 'KERN_ERR' to correct the situation.

I documented it in the MTD web site that people have to send the 'dmesg' output
when submitting bug reposts - it did not help.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-02-29 16:10:20 +02:00
Artem Bityutskiy 515315a123 UBIFS: fix key printing
Before commit 56e46742e8 we have had locking
around all printing macros and we could use static buffers for creating
key strings and printing them. However, now we do not have that locking and
we cannot use static buffers. This commit removes the old DBGKEY() macros
and introduces few new helper macros for printing debugging messages plus
a key at the end. Thankfully, all the messages are already structures in
a way that the key is printed in the end.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-01-13 12:50:42 +02:00
Artem Bityutskiy beba006074 UBIFS: use snprintf instead of sprintf when printing keys
Switch to 'snprintf()' which is more secure and reliable. This is also a
preparation to the subsequent key printing fixes.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-01-13 12:46:21 +02:00
Artem Bityutskiy d37854cf99 UBIFS: introduce a helper to dump scanning info
This commit adds 'dbg_dump_sleb()' helper function to dump scanning
information.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
2011-08-22 16:23:56 +03:00
Artem Bityutskiy a7fa94a9fe UBIFS: improve power cut emulation testing
This patch cleans-up and improves the power cut testing:

1. Kill custom 'simple_random()' function and use 'random32()' instead.
2. Make timeout larger
3. When cutting the buffer - fill the end with random data sometimes, not
   only with 0xFFs.
4. Some times cut in the middle of the buffer, not always at the end.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-07-04 10:54:34 +03:00
Artem Bityutskiy d27462a518 UBIFS: rename recovery testing variables
Since the recovery testing is effectively about emulating power cuts by UBIFS,
use "power cut" as the base term for all the related variables and name them
correspondingly. This is just a minor clean-up for the sake of readability.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-07-04 10:54:34 +03:00
Artem Bityutskiy f57cb188cc UBIFS: remove custom list of superblocks
This is a clean-up of the power-cut emulation code - remove the custom list of
superblocks which we maintained to find the superblock by the UBI volume
descriptor. We do not need that crud any longer, because now we can get the
superblock as a function argument.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-07-04 10:54:33 +03:00
Artem Bityutskiy 0a541b14e8 UBIFS: stop re-defining UBI operations
Now when we use UBIFS helpers for all the I/O, we can remove the horrible hack
of re-defining UBI I/O functions.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-07-04 10:54:33 +03:00
Artem Bityutskiy 891a54a153 UBIFS: remove unused and unneeded debugging function
This patch contains several minor clean-up and preparational cahnges.

1. Remove 'dbg_read()', 'dbg_write()', 'dbg_change()', and 'dbg_leb_erase()'
   functions as they are not used.
2. Remove 'dbg_leb_read()' and 'dbg_is_mapped()' as they are not really needed,
   it is fine to let reads go through in failure mode.
3. Rename 'offset' argument to 'offs' to be consistent with the rest of UBIFS
   code.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-07-04 10:54:32 +03:00
Artem Bityutskiy e7717060dd UBIFS: add global debugfs knobs
Now we have per-FS (superblock) debugfs knobs, but they have one drawback - you
have to first mount the FS and only after this you can switch self-checks
on/off. But often we want to have the checks enabled during the mount.
Introduce global debugging knobs for this purpose.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-07-04 10:54:32 +03:00
Artem Bityutskiy 28488fc28a UBIFS: introduce debugfs helpers
Separate out pieces of code from the debugfs file read/write functions and
create separate 'interpret_user_input()'/'provide_user_output()' helpers. These
helpers will be needed in one of the following patches, so this is just a
preparational change.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-07-04 10:54:32 +03:00
Artem Bityutskiy 7dae997de6 UBIFS: re-arrange debugging code a bit
Move 'dbg_debugfs_init()' and 'dbg_debugfs_exit()' functions which initialize
debugfs for whole UBIFS subsystem below the code which initializes debugfs for
a particular UBIFS instance. And do the same for 'ubifs_debugging_init()' and
'ubifs_debugging_exit()' functions. This layout is a bit better for the next
patches, so this is just a preparation.

Also, rename 'open_debugfs_file()' into 'dfs_file_open()' for consistency.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-07-04 10:54:32 +03:00
Artem Bityutskiy 24a4f8009e UBIFS: be more informative in failure mode
When we are testing UBIFS recovery, it is better to print in which eraseblock
we are going to fail. Currently UBIFS prints it only if recovery debugging
messages are enabled, but this is not very practical. So change 'dbg_rcvry()'
messages to 'ubifs_warn()' messages.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-07-04 10:54:30 +03:00
Artem Bityutskiy 81e79d38df UBIFS: switch self-check knobs to debugfs
UBIFS has many built-in self-check functions which can be enabled using the
debug_chks module parameter or the corresponding sysfs file
(/sys/module/ubifs/parameters/debug_chks). However, this is not flexible enough
because it is not per-filesystem. This patch moves this to debugfs interfaces.

We already have debugfs support, so this patch just adds more debugfs files.
While looking at debugfs support I've noticed that it is racy WRT file-system
unmount, and added a TODO entry for that. This problem has been there for long
time and it is quite standard debugfs PITA. The plan is to fix this later.

This patch is simple, but it is large because it changes many places where we
check if a particular type of checks is enabled or disabled.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-07-04 10:54:28 +03:00