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2009-06-24helpers for acl caching + switch to thoseAl Viro1-1/+1
helpers: get_cached_acl(inode, type), set_cached_acl(inode, type, acl), forget_cached_acl(inode, type). ubifs/xattr.c needed includes reordered, the rest is a plain switchover. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-06-17Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6Linus Torvalds6-72/+102
* 'linux-next' of git://git.infradead.org/ubifs-2.6: UBIFS: start using hrtimers hrtimer: export ktime_add_safe UBIFS: do not forget to register BDI device UBIFS: allow sync option in rootflags UBIFS: remove dead code UBIFS: use anonymous device UBIFS: return proper error code if the compr is not present UBIFS: return error if link and unlink race UBIFS: reset no_space flag after inode deletion
2009-06-16ubifs: register backing_dev_infoJens Axboe1-0/+3
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-06-11Push BKL down into ->remount_fs()Alessio Igor Bogani1-1/+8
[xfs, btrfs, capifs, shmem don't need BKL, exempt] Signed-off-by: Alessio Igor Bogani <abogani@texware.it> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-06-11push BKL down into ->put_superChristoph Hellwig1-0/+5
Move BKL into ->put_super from the only caller. A couple of filesystems had trivial enough ->put_super (only kfree and NULLing of s_fs_info + stuff in there) to not get any locking: coda, cramfs, efs, hugetlbfs, omfs, qnx4, shmem, all others got the full treatment. Most of them probably don't need it, but I'd rather sort that out individually. Preferably after all the other BKL pushdowns in that area. [AV: original used to move lock_super() down as well; these changes are removed since we don't do lock_super() at all in generic_shutdown_super() now] [AV: fuse, btrfs and xfs are known to need no damn BKL, exempt] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-06-11enforce ->sync_fs is only called for rw superblockChristoph Hellwig1-3/+0
Make sure a superblock really is writeable by checking MS_RDONLY under s_umount. sync_filesystems needed some re-arragement for that, but all but one sync_filesystem caller had the correct locking already so that we could add that check there. cachefiles grew s_umount locking. I've also added a WARN_ON to sync_filesystem to assert this for future callers. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-06-08UBIFS: start using hrtimersArtem Bityutskiy3-21/+32
UBIFS uses timers for write-buffer write-back. It is not crucial for us to write-back exactly on time. We are fine to write-back a little earlier or later. And this means we may optimize UBIFS timer so that it could be groped with a close timer event, so that the CPU would not be waken up just to do the write back. This is optimization to lessen power consumption, which is important in embedded devices UBIFS is used for. hrtimers have a nice feature: they are effectively range timers, and we may defind the soft and hard limits for it. Standard timers do not have these feature. They may only be made deferrable, but this means there is effectively no hard limit. So, we will better use hrtimers. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-06-08UBIFS: do not forget to register BDI deviceArtem Bityutskiy1-0/+3
Reviewed-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-06-02UBIFS: allow sync option in rootflagsArtem Bityutskiy1-5/+35
When passing UBIFS parameters via kernel command line, the sync option will be passed to UBIFS as a string, not as an MS_SYNCHRONOUS flag. Teach UBIFS interpreting this flag. Reported-by: Aurélien GÉRÔME <ag@debian.org> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-05-29UBIFS: remove dead codeArtem Bityutskiy2-28/+4
UBIFS assumes that @c->min_io_size is 8 in case of NOR flash. This is because UBIFS alignes all nodes to 8-byte boundary, and maintaining @c->min_io_size introduced unnecessary complications. This patch removes senseless constructs like: if (c->min_io_size == 1) NOR-specific code Also, few commentaries amendments. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-05-26UBIFS: use anonymous deviceArtem Bityutskiy1-17/+4
UBIFS has erroneuosly set 'sb->s_dev' to the UBI volume character device major/minor. This may lead to clashes if there is another FS mounted to a block device with the same major/minor numbers. User-space programs which use 'stat->st_dev' may get confused because of this. This problem was found by Al Viro. He also pointed the way to fix the problem - use 'set_anon_super()' and 'kill_anon_super()' VFS helpers. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-05-25UBIFS: return proper error code if the compr is not presentCorentin Chary1-0/+1
If the compressor is not present, mount_ubifs need to return an error code. This way ubifs_fill_super will stop and handle the error. Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-05-19UBIFS: return error if link and unlink raceHunter Adrian1-0/+19
Consider a scenario when 'vfs_link(dirA/fileA)' and 'vfs_unlink(dirA/fileA, dirB/fileB)' race. 'vfs_link()' does not lock 'dirA->i_mutex', so this is possible. Both of the functions lock 'fileA->i_mutex' though. Suppose 'vfs_unlink()' wins, and takes 'fileA->i_mutex' mutex first. Suppose 'fileA->i_nlink' is 1. In this case 'ubifs_unlink()' will drop the last reference, and put 'inodeA' to the list of orphans. After this, 'vfs_link()' will link 'dirB/fileB' to 'inodeA'. Thir is a problem because, for example, the subsequent 'vfs_unlink(dirB/fileB)' will add the same inode to the list of orphans. This problem was reported by J. R. Okajima <hooanon05@yahoo.co.jp> [Artem: add more comments, amended commit message] Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-05-09Convert obvious places to deactivate_locked_super()Al Viro1-2/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-06UBIFS: reset no_space flag after inode deletionAdrian Hunter2-1/+7
When UBIFS runs out of space it spends a lot of time trying to find more space before returning ENOSPC. As there is no point repeating that unless something has changed, UBIFS has an optimization to record that the file system is 100% full and not try to find space. That flag was not being reset when a pending deletion was finally done. Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com> Reviewed-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-04-06Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6Linus Torvalds17-265/+482
* 'linux-next' of git://git.infradead.org/ubifs-2.6: UBIFS: fix recovery bug UBIFS: add R/O compatibility UBIFS: fix compiler warnings UBIFS: fully sort GCed nodes UBIFS: fix commentaries UBIFS: introduce a helpful variable UBIFS: use KERN_CONT UBIFS: fix lprops committing bug UBIFS: fix bogus assertion UBIFS: fix bug where page is marked uptodate when out of space UBIFS: amend key_hash return value UBIFS: improve find function interface UBIFS: list usage cleanup UBIFS: fix dbg_chk_lpt_sz()
2009-04-03Merge branch 'for-linus' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (28 commits) trivial: Update my email address trivial: NULL noise: drivers/mtd/tests/mtd_*test.c trivial: NULL noise: drivers/media/dvb/frontends/drx397xD_fw.h trivial: Fix misspelling of "Celsius". trivial: remove unused variable 'path' in alloc_file() trivial: fix a pdlfush -> pdflush typo in comment trivial: jbd header comment typo fix for JBD_PARANOID_IOFAIL trivial: wusb: Storage class should be before const qualifier trivial: drivers/char/bsr.c: Storage class should be before const qualifier trivial: h8300: Storage class should be before const qualifier trivial: fix where cgroup documentation is not correctly referred to trivial: Give the right path in Documentation example trivial: MTD: remove EOL from MODULE_DESCRIPTION trivial: Fix typo in bio_split()'s documentation trivial: PWM: fix of #endif comment trivial: fix typos/grammar errors in Kconfig texts trivial: Fix misspelling of firmware trivial: cgroups: documentation typo and spelling corrections trivial: Update contact info for Jochen Hein trivial: fix typo "resgister" -> "register" ...
2009-04-01mm: page_mkwrite change prototype to match faultNick Piggin1-3/+6
Change the page_mkwrite prototype to take a struct vm_fault, and return VM_FAULT_xxx flags. There should be no functional change. This makes it possible to return much more detailed error information to the VM (and also can provide more information eg. virtual_address to the driver, which might be important in some special cases). This is required for a subsequent fix. And will also make it easier to merge page_mkwrite() with fault() in future. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Chris Mason <chris.mason@oracle.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: Miklos Szeredi <miklos@szeredi.hu> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <joel.becker@oracle.com> Cc: Artem Bityutskiy <dedekind@infradead.org> Cc: Felix Blyakher <felixb@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-03-31UBIFS: fix recovery bugAdrian Hunter1-47/+23
UBIFS did not recovery in a situation in which it could have. The relevant function assumed there could not be more nodes in an eraseblock after a corrupted node, but in fact the last (NAND) page written might contain anything. The correct approach is to check for empty space (0xFF bytes) from then on. Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
2009-03-30trivial: fix typos/grammar errors in Kconfig textsMatt LaPlante1-2/+2
Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-03-27vfs: simple_set_mnt() should return voidSukadev Bhattiprolu1-1/+2
simple_set_mnt() is defined as returning 'int' but always returns 0. Callers assume simple_set_mnt() never fails and don't properly cleanup if it were to _ever_ fail. For instance, get_sb_single() and get_sb_nodev() should: up_write(sb->s_unmount); deactivate_super(sb); if simple_set_mnt() fails. Since simple_set_mnt() never fails, would be cleaner if it did not return anything. [akpm@linux-foundation.org: fix build] Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Acked-by: Serge Hallyn <serue@us.ibm.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-03-26UBIFS: add R/O compatibilityArtem Bityutskiy4-11/+72
Now UBIFS is supported by u-boot. If we ever decide to change the media format, then people will have to upgrade their u-boots to mount new format images. However, very often it is possible to preserve R/O forward-compatibility, even though the write forward-compatibility is not preserved. This patch introduces a new super-block field which stores the R/O compatibility version. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Acked-by: Adrian Hunter <Adrian.Hunter@nokia.com>
2009-03-20UBIFS: fix compiler warningsHunter Adrian1-4/+4
fs/ubifs/super.c: In function ‘ubifs_show_options’: fs/ubifs/super.c:425: warning: format not a string literal and no format arguments fs/ubifs/super.c: In function ‘mount_ubifs’: fs/ubifs/super.c:1204: warning: format not a string literal and no format arguments fs/ubifs/super.c: In function ‘ubifs_remount_rw’: fs/ubifs/super.c:1557: warning: format not a string literal and no format arguments Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-03-20UBIFS: fully sort GCed nodesArtem Bityutskiy1-132/+296
The 'joinup()' function cannot deal with situations when nodes go in reverse order - it just leaves them in this order. This patch implement full nodes sorting using n*log(n) algorithm. It sorts data nodes for bulk-read, and direntry nodes for readdir(). Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-03-20UBIFS: fix commentariesArtem Bityutskiy8-9/+9
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-03-16UBIFS: introduce a helpful variableArtem Bityutskiy4-21/+23
This patch introduces a helpful @c->idx_leb_size variable. The patch also fixes some spelling issues and makes comments use "LEB" instead of "eraseblock", which is more correct. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-03-16UBIFS: use KERN_CONTArtem Bityutskiy2-6/+6
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-03-16UBIFS: fix lprops committing bugArtem Bityutskiy1-4/+3
When writing lprop nodes, do not forget to set @from to 0 when switching the LEB. This fixes the following bug: UBIFS error (pid 27768): ubifs_leb_write: writing -15456 bytes at 16:15880, error -22 UBIFS error (pid 27768): do_commit: commit failed, error -22 UBIFS warning (pid 27768): ubifs_ro_mode: switched to read-only mode, error -22 Pid: 27768, comm: freespace Not tainted 2.6.29-rc4-ubifs-2.6 #43 Call Trace: [<ffffffffa00c46d6>] ubifs_ro_mode+0x54/0x56 [ubifs] [<ffffffffa00cfa16>] do_commit+0x4f5/0x50a [ubifs] [<ffffffffa00cfae7>] ubifs_run_commit+0xbc/0xdb [ubifs] [<ffffffffa00d42b9>] ubifs_budget_space+0x742/0x9ed [ubifs] [<ffffffff812daf45>] ? __mutex_lock_common+0x361/0x3ae [<ffffffffa00bc437>] ? ubifs_write_begin+0x18d/0x44c [ubifs] [<ffffffffa00bc5cb>] ubifs_write_begin+0x321/0x44c [ubifs] [<ffffffff8106222b>] ? trace_hardirqs_on_caller+0x1f/0x14d [<ffffffff81097ce2>] generic_file_buffered_write+0x12f/0x2d9 [<ffffffff8109828d>] __generic_file_aio_write_nolock+0x261/0x295 [<ffffffff81098aff>] generic_file_aio_write+0x69/0xc5 [<ffffffffa00bb914>] ubifs_aio_write+0x14c/0x19e [ubifs] [<ffffffff810c8f42>] do_sync_write+0xe7/0x12d [<ffffffff81055378>] ? autoremove_wake_function+0x0/0x38 [<ffffffff81149edc>] ? security_file_permission+0x11/0x13 [<ffffffff810c9827>] vfs_write+0xab/0x105 [<ffffffff810c9945>] sys_write+0x47/0x6f [<ffffffff8100c35b>] system_call_fastpath+0x16/0x1b Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-03-15UBIFS: fix bogus assertionArtem Bityutskiy1-4/+8
Empty journal head LEBs are accounted as taken empty as well, so the GC LEB does not have to be the only taken empty LEB when nounting/remounting. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-03-14UBIFS: fix bug where page is marked uptodate when out of spaceAdrian Hunter1-2/+12
UBIFS fast path in write_begin may mark a page up to date and then discover that there may not be enough space to do the write, and so fall back to a slow path. The slow path tries harder, but may still find no space - leaving the page marked up to date, when it is not. This patch ensures that the page is marked not up to date in that case. The bug that this patch fixes becomes evident when the write is into a hole (sparse file) or is at the end of the file and a subsequent read is off the end of the file. In both cases, the file system should return zeros but was instead returning the page that had not been written because the file system was out of space. Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-03-08UBIFS: amend key_hash return valueArtem Bityutskiy1-3/+3
... which should be uint32_t, not int. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-03-08UBIFS: improve find function interfaceArtem Bityutskiy3-10/+9
Make 'ubifs_find_free_space()' return offset where free space starts, rather than the amount of free space. This is just more appropriat for its caller. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-02-17UBIFS: list usage cleanupEric Sesterhenn2-6/+3
Trivial cleanup, list_del(); list_add{,_tail}() is equivalent to list_move{,_tail}(). Semantic patch for coccinelle can be found at www.cccmz.de/~snakebyte/list_move_tail.spatch Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-02-09UBIFS: fix dbg_chk_lpt_sz()Adrian Hunter1-8/+13
The debugging function dbg_chk_lpt_sz() was not working correctly for small min_io_unit size e.g. NOR flash. Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-01-29UBIFS: remove fast unmountingArtem Bityutskiy2-47/+5
This UBIFS feature has never worked properly, and it was a mistake to add it because we simply have no use-cases. So, lets still accept the fast_unmount mount option, but ignore it. This does not change much, because UBIFS commit in sync_fs anyway, and sync_fs is called while unmounting. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-01-29UBIFS: return sensible error codesArtem Bityutskiy2-9/+4
When mounting/re-mounting, UBIFS returns EINVAL even if the ENOSPC or EROFS codes are are much better, just because we have not found references to ENOSPC/EROFS in mount (2) man pages. This patch changes this behaviour and makes UBIFS return real error code, because: 1. It is just less confusing and more logical 2. mount is not described in SuSv3, so it seems to be not really well-standartized 3. we do not cover all cases, and any random undocumented in man pages error code may be returned anyway Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-01-29UBIFS: remount ro fixesAdrian Hunter3-21/+13
- preserve the idx_gc list - it will be needed in the same state, should UBIFS be remounted rw again - prevent remounting ro if we have switched to read only mode (due to a fatal error) Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-01-29UBIFS: spelling fix 'date' -> 'data'Adrian Hunter2-2/+2
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-01-29UBIFS: sync wbufs after syncing inodes and pagesAdrian Hunter1-10/+10
All writes go through wbufs so they must be sync'd after syncing inodes and pages. Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-01-28UBIFS: fix LPT out-of-space bug (again)Adrian Hunter1-12/+32
The function to traverse and dirty the LPT was still not dirtying all nodes, with the result that the LPT could run out of space. Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-01-27UBIFS: fix no_chk_data_crcArtem Bityutskiy3-13/+23
When data CRC checking is disabled, UBIFS returns incorrect return code from the 'try_read_node()' function (0 instead of 1, which means CRC error), which make the caller re-read the data node again, but using a different code patch, so the second read is fine. Thus, we read the same node twice. And the result of this is that UBIFS is slower with no_chk_data_crc option than it is with chk_data_crc option. This patches fixes the problem. Reported-by: Reuben Dowle <Reuben.Dowle@navico.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-01-26UBIFS: fix assertionsArtem Bityutskiy1-6/+7
I introduce wrong assertions in one of the previous commits, this patch fixes them. Also, initialize debugfs after the debugging check. This is a little nicer because we want the FS data to be accessible to external users after everything has been initialized. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-01-26UBIFS: ensure orphan area head is initializedAdrian Hunter3-19/+26
When mounting read-only the orphan area head is not initialized. It must be initialized when remounting read/write, but it was not. This patch fixes that. [Artem: sorry, added comment tweaking noise] Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-01-26UBIFS: always clean up GC LEB spaceArtem Bityutskiy1-14/+33
When we mount UBIFS, GC LEB may contain out-of-date information, and UBIFS should update lprops and set free space for thei LEB. Currently UBIFS does this only if mounted R/W. But for R/O mount we have to do the same, because otherwise we will have incorrect FS free space reported to user-space. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-01-26UBIFS: add re-mount debugging checksArtem Bityutskiy7-65/+148
We observe space corrupted accounting when re-mounting. So add some debbugging checks to catch problems like this. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-01-26UBIFS: fix LEB list freeingArtem Bityutskiy4-20/+48
When freeing the c->idx_lebs list, we have to release the LEBs as well, because we might be called from mount to read-only mode code. Otherwise the LEBs stay taken forever, which may cause problems when we re-mount back ro RW mode. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-01-26UBIFS: simplify lockingArtem Bityutskiy1-56/+36
This patch simplifies lock_[23]_inodes functions. We do not have to care about locking order, because UBIFS does this for @i_mutex and this is enough. Thanks to Al Viro for suggesting this. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-01-20UBIFS: document dark_wm and dead_wm betterArtem Bityutskiy3-11/+24
Just add more commentaries. Also some commentary fixes for lprops flags. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-01-20UBIFS: do not treat all data as short termArtem Bityutskiy1-1/+1
UBIFS wrongly tells UBI that all data is short term. Use proper hints instead. Thanks to Xiaochuan-Xu for noticing this. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-01-18UBIFS: constify operationsArtem Bityutskiy4-14/+14
Mark super, file, and inode operation structcutes with 'const'. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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