The is_path_accessible check uses a QPathInfo call, which isn't
supported by ancient win9x era servers. Fall back to an older
SMBQueryInfo call if it fails with the magic error codes.
Cc: stable@kernel.org
Reported-and-Tested-by: Sandro Bonazzola <sandro.bonazzola@gmail.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
summarise_journal_usage seems to be obsolete for a long time,
so remove it.
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: Jan Kara <jack@suse.cz>
In do_get_write_access() we wait on BH_Unshadow bit for buffer to get
from shadow state. The waking code in journal_commit_transaction() has
a bug because it does not issue a memory barrier after the buffer is moved
from the shadow state and before wake_up_bit() is called. Thus a waitqueue
check can happen before the buffer is actually moved from the shadow state
and waiting process may never be woken. Fix the problem by issuing proper
barrier.
CC: stable@kernel.org
Reported-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: Jan Kara <jack@suse.cz>
When ext2 mounts a filesystem, it attempts to set the block device
blocksize with a call to sb_set_blocksize, which can fail for
several reasons. The current failure message in ext2 prints:
EXT2-fs (loop1): error: blocksize is too small
which is not correct in all cases. This can be demonstrated
by creating a filesystem with
# mkfs.ext2 -b 8192
on a 4k page system, and attempting to mount it.
Change the error message to a more generic:
EXT2-fs (loop1): bad blocksize 8192
to match the error message in ext3.
Signed-off-by: Robin Dong <sanbai@taobao.com>
Reviewed-by: Coly Li <bosong.ly@taobao.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
If an application program does not make any changes to the indirect
blocks or extent tree, i_datasync_tid will not get updated. If there
are enough commits (i.e., 2**31) such that tid_geq()'s calculations
wrap, and there isn't a currently active transaction at the time of
the fdatasync() call, this can end up triggering a BUG_ON in
fs/jbd/commit.c:
J_ASSERT(journal->j_running_transaction != NULL);
It's pretty rare that this can happen, since it requires the use of
fdatasync() plus *very* frequent and excessive use of fsync(). But
with the right workload, it can.
We fix this by replacing the use of tid_geq() with an equality test,
since there's only one valid transaction id that is valid for us to
start: namely, the currently running transaction (if it exists).
CC: stable@kernel.org
Reported-by: Martin_Zielinski@McAfee.com
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Jan Kara <jack@suse.cz>
When make_indexed_dir() fails (e.g. because of ENOSPC) after it has allocated
block for index tree root, we did not properly mark all changed buffers dirty.
This lead to only some of these buffers being written out and thus effectively
corrupting the directory.
Fix the issue by marking all changed data dirty even in the error failure case.
CC: stable@kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
* use proc_mkdir_mode() instead of create_proc_entry(S_IFDIR|...),
export proc_mkdir_mode() for that, oh well.
* don't supply S_IFREG to proc_create_data(), it's unnecessary
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Currently after mount/remount operation on pstore filesystem,
the content on pstore will be lost. It is because current ERST
implementation doesn't support multi-user usage, which moves
internal pointer to the end after accessing it. Adding
multi-user support for pstore usage.
Signed-off-by: Chen Gong <gong.chen@linux.intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
the return type of function _read_ in pstore is size_t,
but in the callback function of _read_, the logic doesn't
consider it too much, which means if negative value (assuming
error here) is returned, it will be converted to positive because
of type casting. ssize_t is enough for this function.
Signed-off-by: Chen Gong <gong.chen@linux.intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This patch addresses bugs found while testing punch hole
with the fsx test. The patch corrects the number of blocks
that are zeroed out while splitting an extent, and also corrects
the return value to return the number of blocks split out, instead
of the number of blocks zeroed out.
This patch has been tested in addition to the following patches:
[Ext4 punch hole v7]
[XFS Tests Punch Hole 1/1 v2] Add Punch Hole Testing to FSX
The test ran successfully for 24 hours.
Signed-off-by: Allison Henderson <achender@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
If quota is not enabled when ext4_quota_off() is called, we must not
dereference quota file inode since it is NULL. Check properly for
this.
This fixes a bug in commit 21f976975c (ext4: remove unnecessary
[cm]time update of quota file), which was merged for 2.6.39-rc3.
Reported-by: Amir Goldstein <amir73il@users.sf.net>
Signed-off-by: Amir Goldstein <amir73il@users.sf.net>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This patch fixes an extremely rare mount failure after a power cut, when mount
fails with ENOSPC error because UBIFS could not find the GC LEB.
In short, the reason for this failure is that after recovery the GC head LEB
contains less free space than it had contained just before the power cut
happened. As a result, if the FS is full, 'ubifs_rcvry_gc_commit()' is unable
to find a dirty LEB to GC and a free LEB, so mount fails.
This patch contains a huge comment with more detailed explanation, please refer
that comment.
Since this is really really rare and unlikely situation, I do not send this
patch to the stable tree, also because it requires a lot of preparation
patches which I did before. So sending this to -stable would be too risky.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Further simplify 'ubifs_recover_leb()' by noticing that we have to call
'clean_buf()' in any case, and it is fine to call it if the offset is
aligned to 'c->min_io_size'. Thus, we do not have to call it separately
from every "if" - just call it once at the end.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Now when we call 'ubifs_recover_leb()' only for LEBs which are potentially
corrupted (i.e., only for last buds, not for all of them), we can cleanup every
LEB, not only those where we find corruption. The reason - unstable bits. Even
though the LEB may look good now, it might contain unstable bits which may hit
us a bit later.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This patch cleans up 'ubifs_recover_leb()' function and makes it more readable.
Move things which are done only once out of the loop and kill unneeded 'switch'
statement.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
If a UBIFS filesystem is being mounted read-write, or is being remounted
from read-only to read-write, check for the "space_fixup" flag and fix
all LEBs containing empty space if necessary.
Artem: tweaked the patch a bit
Signed-off-by: Matthew L. Creech <mlcreech@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This patch adds the 'ubifs_fixup_free_space()' function which scans all
LEBs in the filesystem for those that are in-use but have one or more
empty pages, then re-maps the LEBs in order to erase the empty portions.
Afterward it removes the "space_fixup" flag from the UBIFS superblock.
Artem: massaged the patch
Signed-off-by: Matthew L. Creech <mlcreech@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
The 'space_fixup' flag can be set in the superblock of a new filesystem by
mkfs.ubifs to indicate that any eraseblocks with free space remaining should be
fixed-up the first time it's mounted (after which the flag is un-set). This
means that the UBIFS image has been flashed by a "dumb" flasher and the free
space has been actually programmed (writing all 0xFFs), so this free space
cannot be used. UBIFS fixes the free space up by re-writing the contents of all
LEBs with free space using the atomic LEB change UBI operation.
Artem: improved commit message, add some more commentaries to the code.
Signed-off-by: Matthew L. Creech <mlcreech@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
We'll need to use the 'next_log_lnum()' helper function from log.c in the fixup
code, so let's move it to misc.h. IOW, this is a preparation to the following
free space fixup changes.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This patch improves UBIFS recovery and teaches it to expect corruption only
in the last buds. Indeed, currently we just recover all buds, which is
incorrect because only the last buds can have corruptions in case of a power
cut. So it is inconsistent with the rest of the recovery strategy which tries
hard to distinguish between corruptions cause by power cuts and other types of
corruptions.
This patch also adds one quirk - a bit older UBIFS was could have corruption in
the next to last bud because of the way it switched buds: when bud A is full,
it first searched for the next bud B, the wrote a reference node to the log
about B, and then synchronized the write-buffer of A. So we could end up with
buds A and B, where B is the last, but A had corruption. The UBIFS behavior
was fixed, though, so currently it always first synchronizes A's write-buffer
and only after this adds B to the log. However, to be make sure that we handle
unclean (after a power cut) UBIFS images belonging to older UBIFS - we need to
add a quirk and keep it for some time: we need to check for the situation
described above.
Thankfully, it is easy to check for that situation. When UBIFS adds B to the
log, it always first unmaps B, then maps it, and then syncs A's write-buffer.
Thus, in that situation we can check that B is empty, in which case it is OK to
have corruption in A. To check that B is empty it is enough to just read the
first few bytes of the bud and compare them with 0xFFs. This quirk may be
removed in a couple of years.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Currently when UBIFS fills up the current bud (which is the last in the journal
head) and switches to the next bud, it first writes the log reference node for
the next bud and only after this synchronizes the write-buffer of the previous
bud. This is not a big deal, but an unclean power cut may lead to a situation
when we have corruption in a next-to-last bud, although it is much more logical
that we have to have corruption only in the last bud.
This patch also removes write-buffer synchronization from
'ubifs_wbuf_seek_nolock()' because this is not needed anymore (we synchronize
the write-buffer explicitly everywhere now) and also because this is just
prone to various errors.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Remove a 'BUG()' statement when we are unable to find a bud and add a
similar 'ubifs_assert()' statement instead.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This is a minor preparation patch which changes 'replay_bud()' interface -
instead of passing bud lnum, offs, jhead, etc directly, pass a pointer to the
bud entry which contains all the information. The bud entry will be also needed
in one of the following patches.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This patch simplifies replay even further - it removes the replay tree and
adds the replay list instead. Indeed, we just do not need to use a tree here -
all we need to do is to add all nodes to the list and then sort it. Using
RB-tree is an overkill - more code and slower. And since we replay buds in
order, we expect the nodes to follow in _mostly_ sorted order, so the merge
sort becomes much cheaper in average than an RB-tree.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This patch simplifies the replay code and makes it smaller. First of all, we
can notice that we do not really need to create bud replay entries and insert
them to the replay tree, because the only reason we do this is to set buds
lprops correctly at the end. Instead, we can just walk the list of buds at the
very end and set lprops for each bud. This allows us to get rid of whole
'insert_ref_node()' function, the 'REPLAY_REF' flag, and several fields in
'struct replay_entry'. Then we can also notice that we do not need the 'flags'
'struct replay_entry' field, because there is only one flag -
'REPLAY_DELETION'. Instead, we can just add a 'deletion' bit fields. As a
result, this patch deletes much more lines that in adds.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This is just a small preparation patch which adds 'free' and 'drity' fields to
'struct bud_entry'. They will be used to set bud lprops.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This is patch removes an unnecessary 'offs' variable from 'ubifs_wbuf_write_nolock()'
- we can just keep 'wbuf->offs' up-to-date instead. This patch is very minor
the only motivation for it was that it is cleaner to keep wbuf->offs up-to-date
by the time we call 'ubifs_leb_write()'.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Commit 52c6e6f990 provides misleading infomation
in the commit messages - buds are replied in order. And the real reason why
that fix helped is probably because it made sure we seek head even in read-only
mode (so deferred recovery will have seeked heads).
This patch adds an assertion which will fire if we reply buds out of order.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This is a minor change which makes 2 functions static because they
are not used outside the gc.c file: 'data_nodes_cmp()' and
'nondata_nodes_cmp()'.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Now we return all errors from 'scan_check_cb()' directly, so we do not need
'struct scan_check_data' any more, and this patch removes it.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Simplify error path in 'scan_check_cb()' and stop using the special 'data->err'
field, but instead return the error code directly.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
When doing the lprops extra check ('dbg_check_lprops()') we scan whole media.
We even scan empty and freeable LEBs which may contain garbage, which we handle
after scanning. This patch teach the lprops checking function
('scan_check_cb()') to avoid scanning for free and freeable LEBs and save time.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Fix for a null pointer bug found while running punch hole tests
Signed-off-by: Allison Henderson <achender@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Steps to reproduce the bug:
- Call FS_IOC_SETLFAGS ioctl with flags=FS_COMPR_FL
- Call FS_IOC_SETFLAGS ioctl with flags=0
- Call FS_IOC_GETFLAGS ioctl, and you'll see FS_COMPR_FL is still set!
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
FS_COW_FL and FS_NOCOW_FL were newly introduced to control per file
COW in btrfs, but FS_NOCOW_FL is sufficient.
The fact is we don't have corresponding BTRFS_INODE_COW flag.
COW is default, and FS_NOCOW_FL can be used to switch off COW for
a single file.
If we mount btrfs with nodatacow, a newly created file will be set with
the FS_NOCOW_FL flag. So to turn on COW for it, we can just clear the
FS_NOCOW_FL flag.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
When a btrfs disk is created by mixed data & metadata option, it will have no
pure data or pure metadata space info.
In btrfs's for-linus branch, commit 78b1ea13838039cd88afdd62519b40b344d6c920
(Btrfs: fix OOPS of empty filesystem after balance) initializes space infos at
the very beginning. The problem is this initialization does not take the mixed
case into account, which will cause btrfs will easily get into ENOSPC in mixed
case.
Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
If posix_acl_from_xattr() returns an error code, a negative address is
dereferenced causing an oops; fix by checking for error code first.
Signed-off-by: Daniel J Blueman <daniel.blueman@gmail.com>
Reviewed-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This allows drivers who call this function to be compiled modularly.
Otherwise, a driver who is interested in this type of functionality
has to implement their own get_task_comm() call, causing code
duplication in the Linux source tree.
Signed-off-by: J Freyensee <james_p_freyensee@linux.intel.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Enabling DEBUG_STRICT_USER_COPY_CHECKS causes the following
warning:
In file included from arch/x86/include/asm/uaccess.h:573,
from include/linux/uaccess.h:5,
from include/linux/highmem.h:7,
from include/linux/pagemap.h:10,
from fs/debugfs/file.c:18:
In function 'copy_from_user',
inlined from 'write_file_bool' at fs/debugfs/file.c:435:
arch/x86/include/asm/uaccess_64.h:65: warning: call to
'copy_from_user_overflow' declared with attribute warning:
copy_from_user() buffer size is not provably correct
presumably due to buf_size being signed causing GCC to fail to
see that buf_size can't become negative.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
On some arches (x86, sh, arm, unicore, powerpc) the oops message would
print out the last sysfs file accessed.
This was very useful in finding a number of sysfs and driver core bugs
in the 2.5 and early 2.6 development days, but it has been a number of
years since this file has actually helped in debugging anything that
couldn't also be trivially determined from the stack traceback.
So it's time to delete the line. This is good as we need all the space
we can get for oops messages at times on consoles.
Acked-by: Phil Carmody <ext-phil.2.carmody@nokia.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6:
NFSv4.1: Ensure that layoutget uses the correct gfp modes
NFSv4.1: remove pnfs_layout_hdr from pnfs_destroy_all_layouts tmp_list
NFSv41: Resend on NFS4ERR_RETRY_UNCACHED_REP
It's a hot function, and we're better off not mixing types in the mask
calculations. The compiler just ends up mixing 16-bit and 32-bit
operations, for no good reason.
So do everything in 'unsigned int' rather than mixing 'unsigned int'
masking with a 'umode_t' (16-bit) mode variable.
This, together with the parent commit (47a150edc2: "Cache user_ns in
struct cred") makes acl_permission_check() much nicer.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
During resource migration, if the target node were to die, the thread doing
the migration spins until the target node is not removed from the domain map.
This patch slows the spin by making the thread wait for the recovery to kick in.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Joel Becker <jlbec@evilplan.org>
Patch skips mount recovery for hard-ro mounts which otherwise leads to an oops.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Acked-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Joel Becker <jlbec@evilplan.org>
If o2hb finds unexpected values in the heartbeat slot, it prints a message
"ERROR: Device "dm-6": another node is heartbeating in our slot!"
This message could be misleading. This patch adds two more messages to
help users better diagnose the problem.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Acked-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Joel Becker <jlbec@evilplan.org>
