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Signed-off-by: Steve French <sfrench@us.ibm.com>
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This allows someone to declare a mount as a multiuser mount.
Multiuser mounts also imply "noperm" since we want to allow the server
to handle permission checking. It also (for now) requires Kerberos
authentication. Eventually, we could expand this to other authtypes, but
that requires a scheme to allow per-user credential stashing in some
form.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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This patch is rather large, but it's a bit difficult to do piecemeal...
For non-multiuser mounts, everything will basically work as it does
today. A call to cifs_sb_tlink will return the "master" tcon link.
Turn the tcon pointer in the cifs_sb into a radix tree that uses the
fsuid of the process as a key. The value is a new "tcon_link" struct
that contains info about a tcon that's under construction.
When a new process needs a tcon, it'll call cifs_sb_tcon. That will
then look up the tcon_link in the radix tree. If it exists and is
valid, it's returned.
If it doesn't exist, then we stuff a new tcon_link into the tree and
mark it as pending and then go and try to build the session/tcon.
If that works, the tcon pointer in the tcon_link is updated and the
pending flag is cleared.
If the construction fails, then we set the tcon pointer to an ERR_PTR
and clear the pending flag.
If the radix tree is searched and the tcon_link is marked pending
then we go to sleep and wait for the pending flag to be cleared.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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We need to update the issue_seq on any grant operation, be it via an MDS
reply or a separate grant message. The update in the grant path was
missing. This broke cap release for inodes in which the MDS sent an
explicit grant message that was not soon after followed by a successful
MDS reply on the same inode.
Also fix the signedness on seq locals.
Signed-off-by: Sage Weil <sage@newdream.net>
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If an MDS tries to revoke caps that we don't have, we want to send
releases early since they probably contain the caps message the MDS
is looking for.
Previously, we only sent the messages if we didn't have the inode either. But
in a multi-mds system we can retain the inode after dropping all caps for
a single MDS.
Signed-off-by: Greg Farnum <gregf@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
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encode_fh on error should update max_len with minimum required
size, so that caller can redo the call with the reallocated buffer.
This is required with open by handle patch series
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Sage Weil <sage@newdream.net>
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encode_fh function should return 255 on error as done by other file
system to indicate EOVERFLOW. Also max_len is in sizeof(u32) units
and not in bytes.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Sage Weil <sage@newdream.net>
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If we interrupt an osd request, we call __cancel_request, but it wasn't
verifying that req->r_osd was non-NULL before dereferencing it. This could
cause a crash if osds were flapping and we aborted a request on said osd.
Reported-by: Henry C Chang <henry_c_chang@tcloudcomputing.com>
Signed-off-by: Sage Weil <sage@newdream.net>
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Fix argument order.
Signed-off-by: Henry C Chang <henry_c_chang@tcloudcomputing.com>
Signed-off-by: Sage Weil <sage@newdream.net>
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When marking an inode reclaimable, a per-AG counter is increased, the
inode is tagged reclaimable in its per-AG tree, and, when this is the
first reclaimable inode in the AG, the AG entry in the per-mount tree
is also tagged.
When an inode is finally reclaimed, however, it is only deleted from
the per-AG tree. Neither the counter is decreased, nor is the parent
tree's AG entry untagged properly.
Since the tags in the per-mount tree are not cleared, the inode
shrinker iterates over all AGs that have had reclaimable inodes at one
point in time.
The counters on the other hand signal an increasing amount of slab
objects to reclaim. Since "70e60ce xfs: convert inode shrinker to
per-filesystem context" this is not a real issue anymore because the
shrinker bails out after one iteration.
But the problem was observable on a machine running v2.6.34, where the
reclaimable work increased and each process going into direct reclaim
eventually got stuck on the xfs inode shrinking path, trying to scan
several million objects.
Fix this by properly unwinding the reclaimable-state tracking of an
inode when it is reclaimed.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: stable@kernel.org
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
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This patch adds a per region debugfs file that shows the elapsed time
since the time the o2hb timer was last armed.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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This patch adds mlogs for o2hb up and down events.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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This patch creates debugfs directory for each o2hb region and creates
files to expose the region number and the per region live node bitmap.
This information will be useful in debugging cluster issues.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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This patch prints the bitmaps of live, quorum and failed regions. This
information will be useful in debugging cluster issues.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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In global heartbeat mode, we track the bitmap of regions that have seen
heartbeat timeouts. We fence if the number of such regions is greater than
or equal to half the number of quorum regions.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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o2hb allows online adding of regions. However, a newly added region is not
used in quorum calculations unless it has been added on all nodes. This patch
tracks a bitmap of such quorum regions.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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A heartbeat region becomes live (or active) after a fixed number of (steady)
iterations.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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In global heartbeat mode, we have a upper limit for the number of active regions.
This patch adds the facility to track the number of active global heartbeat
regions and fails to start heartbeat if the number exceeds the maximum.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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Currently we track a global livenode bitmap that keeps track of all nodes
that are heartbeating in all regions.
This patch adds the ability to track the livenode bitmap on a per region basis.
We will use this facility in a later patch to allow us to withstand the loss of
a minority number of regions.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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o2hb debugfs handling is reorganized to allow for easy expansion.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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o2hb currently checks slots for configured nodes only. This patch makes
it check the slots for the live nodes too to take care of a race in which
a node is removed from the configuration but not from the live map.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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Prints messages when the user adds or removes nodes.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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Prints messages when the user adds or removes heartbeat regions in global
heartbeat mode. These messages are useful when debugging cluster related issues.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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Adds new dlm message DLM_QUERY_NODEINFO that sends the attributes of all
registered nodes. This message is sent if the negotiated dlm protocol is
1.1 or higher. If the information of the joining node does not match
that of any existing nodes, the join domain request is rejected.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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In global heartbeat mode, the heartbeat is started by the user. This patch
prints an error if the user attempts to mount a volume without starting the
heartbeat.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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Adds new dlm message DLM_QUERY_REGION that sends the names of all active
heartbeat regions. This message is only sent in the global heartbeat
mode. If the regions in the joining node do not fully match the ones in
the active nodes, the join domain request is rejected.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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Export function in o2hb to get a list of heartbeat regions. It also adds an
upper limit to the length of the heartbeat region name.
o2hb_global_heartbeat_active() currently disables global heartbeat. It will
be enabled in a later patch after all the code is added.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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Add dlm_protocol to the list of info shown by the debugfs file, dlm_state.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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Adds support for heartbeat=global mount option. It ensures that the heartbeat
mode passed matches the one enabled on disk.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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OCFS2_FEATURE_INCOMPAT_CLUSTERINFO allows us to use sb->s_cluster_info for
both userspace and o2cb cluster stacks. It also allows us to extend cluster
info to include stack flags.
This patch also adds stackflags to sb->s_clusterinfo. It also introduces a
clusterinfo flag OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT to denote the enabled
global heartbeat mode.
This incompat flag can be set/cleared using tunefs.ocfs2 --fs-features. The
clusterinfo flag is set/cleared using tunefs.ocfs2 --update-cluster-stack.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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Add heartbeat mode parameter to the configfs tree. This will be used
to set/show the heartbeat mode. The user is free to toggle the mode
between local and global as long as there is no active heartbeat region.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
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* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
writeback: always use sb->s_bdi for writeback purposes
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git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
fuse: Initialize total_len in fuse_retrieve()
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authentication without extended security
Fix incorrect calculation of case sensitive response length in the
ntlmv2 (without extended security) response.
Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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...based on CIFS_MOUNT_MULTIUSER flag.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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When we implement multiuser mounts, we'll need to filter filehandles
by fsuid. Add a flag for multiuser mounts and code to filter by
fsuid when it's set.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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cifsFileInfo needs a pointer to a tcon, but it doesn't currently hold a
reference to it. Change it to keep a pointer to a tcon_link instead and
hold a reference to it.
That will keep the tcon from being freed until the file is closed.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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Eventually, we'll need to track the use of tcons on a per-sb basis, so that
we know when it's ok to tear them down. Begin this conversion by adding a
new "tcon_link" struct and accessors that get it. For now, the core data
structures are untouched -- cifs_sb still just points to a single tcon and
the pointers are just cast to deal with the accessor functions. A later
patch will flesh this out.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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Mostly the glock operations follow the type of the glock. The
one exception is the transaction glock, so we need to check for
that directly.
Reported-by: Dr. David Alan Gilbert <linux@treblig.org>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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smbfs has been scheduled for removal in 2.6.27, so
maybe we can now move it to drivers/staging on the
way out.
smbfs still uses the big kernel lock and nobody
is going to fix that, so we should be getting
rid of it soon.
This removes the 32 bit compat mount and ioctl
handling code, which is implemented in common fs
code, and moves all smbfs related files into
drivers/staging/smbfs.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Nobody appears to be interested in fixing autofs3 bugs
any more and it uses the BKL, which is going away.
Move this to staging for retirement. Unless someone
complains until 2.6.38, we can remove it for good.
The include/linux/auto_fs.h header file is still used
by autofs4, so it remains in place.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Ian Kent <raven@themaw.net>
Cc: autofs@linux.kernel.org
Cc: "H. Peter Anvin" <hpa@zytor.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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If a filesystem has inode size > 128 and someone deletes lost+found and
reuses inode 11 for some other file, extented attributes set for this
inode before umount will get lost after remounting the filesystem. This
is because extended attributes will get stored in an inode but ext3_iget
will ignore them due to workaround of a bug in an old mkfs.
Fix the problem by initializing i_extra_isize to 0 for freshly allocated
inodes where mkfs workaround in ext3_iget applies. This way these inodes
will always store extended attributes in a special block and no problems
occur.
The bug was spotted and a reproduction test provided by:
Masayoshi MIZUMA <m.mizuma@jp.fujitsu.com>
Reviewed-by: Andreas Dilger <adilger.kernel@dilger.ca>
Signed-off-by: Jan Kara <jack@suse.cz>
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Remove "depends on" line from QUOTACTL config option and rather select
the option explicitely from config options which need it. It makes more
sense this way and also fixes Kconfig warning due to GFS2 selecting
QUOTACTL but QUOTACTL not depending on it.
Signed-off-by: Jan Kara <jack@suse.cz>
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The patch solves the following warnings message when CONFIG_COMPAT
is not defined:
fs/autofs4/root.c:31: warning: ‘autofs4_root_compat_ioctl’ declared ‘static’ but never defined
Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Cc: Ian Kent <raven@themaw.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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The patch solves the following warnings message when CONFIG_COMPAT
is not defined:
fs/autofs/root.c:30: warning: ‘autofs_root_compat_ioctl’ declared ‘static’ but never defined
Signed-off-by: Márton Németh <nm127@freemail.hu>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Otherwise partially updated pointers could be seen if
pointer update is not atomic.
Signed-off-by: Petr Vandrovec <petr@vandrovec.name>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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This prepares the removal of the big kernel lock from the
file locking code. We still use the BKL as long as fs/lockd
uses it and ceph might sleep, but we can flip the definition
to a private spinlock as soon as that's done.
All users outside of fs/lockd get converted to use
lock_flocks() instead of lock_kernel() where appropriate.
Based on an earlier patch to use a spinlock from Matthew
Wilcox, who has attempted this a few times before, the
earliest patch from over 10 years ago turned it into
a semaphore, which ended up being slower than the BKL
and was subsequently reverted.
Someone should do some serious performance testing when
this becomes a spinlock, since this has caused problems
before. Using a spinlock should be at least as good
as the BKL in theory, but who knows...
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Matthew Wilcox <willy@linux.intel.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Miklos Szeredi <mszeredi@suse.cz>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Sage Weil <sage@newdream.net>
Cc: linux-kernel@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org
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Dozen of changes in ncpfs to provide some locking other than BKL.
In readdir cache unlock and mark complete first page as last operation,
so it can be used for synchronization, as code intended.
When updating dentry name on case insensitive filesystems do at least
some basic locking...
Hold i_mutex when updating inode fields.
Push some ncp_conn_is_valid down to ncp_request. Connection can become
invalid at any moment, and fewer error code paths to test the better.
Use i_size_{read,write} to modify file size.
Set inode's backing_dev_info as ncpfs has its own special bdi.
In ioctl unbreak ioctls invoked on filesystem mounted 'ro' - tests are
for inode writeable or owner match, but were turned to filesystem
writeable and inode writeable or owner match. Also collect all permission
checks in single place.
Add some locking, and remove comments saying that it would be cool to
add some locks to the code.
Constify some pointers.
Signed-off-by: Petr Vandrovec <petr@vandrovec.name>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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The BKL in ocfs2/dlmfs is used in put_super, fill_super and remount_fs
that are all three protected by the superblocks s_umount rw_semaphore.
The use in ocfs2_control_open is evidently unrelated and the function
is protected by ocfs2_control_lock.
Therefore it is safe to remove the BKL entirely.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <joel.becker@oracle.com>
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The BKL is only used in put_super and fill_super, which are both protected
by the superblocks s_umount rw_semaphore. Therefore it is safe to remove
the BKL entirely.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
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