| Commit message (Collapse) | Author | Age | Files | Lines |
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This patch adds 2 helpers that will be used for the hrtimer based select/poll:
poll_select_set_timeout() is a helper that takes a timeout (as a second, nanosecond
pair) and turns that into a "struct timespec" that represents the absolute end time.
This is a common operation in the many select() and poll() variants and needs various,
common, sanity checks.
poll_select_copy_remaining() is a helper that takes care of copying the remaining
time to userspace, as select(), pselect() and ppoll() do. This function comes in
both a natural and a compat implementation (due to datastructure differences).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
cifs: handle the TCP_Server_Info->tsk field more carefully
cifs: fix unlinking of rename target when server doesn't support open file renames
[CIFS] improve setlease handling
[CIFS] fix saving of resume key before CIFSFindNext
cifs: make cifs_rename handle -EACCES errors
[CIFS] fix build error
[CIFS] undo changes in cifs_rename_pending_delete if it errors out
cifs: track DeletePending flag in cifsInodeInfo
cifs: don't use CREATE_DELETE_ON_CLOSE in cifs_rename_pending_delete
[CIFS] eliminate usage of kthread_stop for cifsd
[CIFS] Add nodfs mount option
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cifs: handle the TCP_Server_Info->tsk field more carefully
We currently handle the TCP_Server_Info->tsk field without any locking,
but with some half-measures to try and prevent races. These aren't
really sufficient though. When taking down cifsd, use xchg() to swap
the contents of the tsk field with NULL so we don't end up trying
to send it more than one signal. Also, don't allow cifsd to exit until
the signal is received if we expect one.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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renames
cifs: fix unlinking of rename target when server doesn't support open file renames
The patch to make cifs_rename undoable broke renaming one file on top of
another when the server doesn't support busy file renames. Remove the
code that uses busy file renames to unlink the target file, and just
have it call cifs_unlink. If the rename of the source file fails, then
the unlink won't be undoable, but hopefully that's rare enough that it
won't be a problem.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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fcntl(F_SETLEASE) currently is not exported by cifs (nor by local file
systems) so cifs grants leases based on how other local processes have
opened the file not by whether the file is cacheable (oplocked). This
adds the check to make sure that the file is cacheable on the client
before checking whether we can grant the lease locally
(generic_setlease). It also adds a mount option for cifs (locallease)
if the user wants to override this and try to grant leases even
if the server did not grant oplock.
Signed-off-by: Steve French <sfrench@us.ibm.com>
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We recently fixed the cifs readdir code so that it saves the resume key
before calling CIFSFindNext. Unfortunately, this assumes that we have
just done a CIFSFindFirst (or FindNext) and have resume info to save.
This isn't necessarily the case. Fix the code to save resume info if we
had to reinitiate the search, and after a FindNext.
This fixes connectathon basic test6 against NetApp filers.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
CC: Stable <stable@kernel.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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cifs: make cifs_rename handle -EACCES errors
Some servers seem to return -EACCES when attempting to rename one
open file on top of another. Refactor the cifs_rename logic to
attempt to rename the target file out of the way in this situation.
This also fixes the "unlink_target" logic to be undoable if the
subsequent rename fails.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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Signed-off-by: Steve French <sfrench@us.ibm.com>
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The cifs_rename_pending_delete process involves multiple steps. If it
fails and we're going to return error, we don't want to leave things in
a half-finished state. Add code to the function to undo changes if
a call fails.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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cifs: track DeletePending flag in cifsInodeInfo
The QPathInfo call returns a flag that indicates whether DELETE_ON_CLOSE
is set. Track it in the cifsInodeInfo.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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cifs: don't use CREATE_DELETE_ON_CLOSE in cifs_rename_pending_delete
CREATE_DELETE_ON_CLOSE apparently has different semantics than when you
set the DELETE_ON_CLOSE bit after opening the file. Setting it in the
open says "delete this file as soon as this filehandle is closed". That's
not what we want for cifs_rename_pending_delete.
Don't set this bit in the CreateFlags. Experimentation shows that
setting this flag in the SET_FILE_INFO call has no effect.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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When cifs_demultiplex_thread was converted to a kthread based kernel
thread, great pains were taken to make it so that kthread_stop would be
used to bring it down. This just added unnecessary complexity since we
needed to use a signal anyway to break out of kernel_recvmsg.
Also, cifs_demultiplex_thread does a bit of cleanup as it's exiting, and
we need to be certain that this gets done. It's possible for a kthread
to exit before its main function is ever run if kthread_stop is called
soon after its creation. While I'm not sure that this is a real problem
with cifsd now, it could be at some point in the future if cifs_mount is
ever changed to bring down the thread quickly.
The upshot here is that using kthread_stop to bring down the thread just
adds extra complexity with no real benefit. This patch changes the code
to use the original method to bring down the thread, but still leaves it
so that the thread is actually started with kthread_run.
This seems to fix the deadlock caused by the reproducer in this bug
report:
https://bugzilla.samba.org/show_bug.cgi?id=5720
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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Older samba server (eg. 3.0.24 from Debian etch) don't work correctly,
if DFS paths are used. Such server claim that they support DFS, but fail
to process some requests with DFS paths. Starting with Linux 2.6.26,
the cifs clients starts sending DFS paths in such situations, rendering
it unuseable with older samba servers.
The nodfs mount options forces a share to be used with non DFS paths,
even if the server claims, that it supports it.
Signed-off-by: Martin Koegler <mkoegler@auto.tuwien.ac.at>
Acked-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Igor Mammedov <niallain@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/viro/bdev: (66 commits)
[PATCH] kill the rest of struct file propagation in block ioctls
[PATCH] get rid of struct file use in blkdev_ioctl() BLKBSZSET
[PATCH] get rid of blkdev_locked_ioctl()
[PATCH] get rid of blkdev_driver_ioctl()
[PATCH] sanitize blkdev_get() and friends
[PATCH] remember mode of reiserfs journal
[PATCH] propagate mode through swsusp_close()
[PATCH] propagate mode through open_bdev_excl/close_bdev_excl
[PATCH] pass fmode_t to blkdev_put()
[PATCH] kill the unused bsize on the send side of /dev/loop
[PATCH] trim file propagation in block/compat_ioctl.c
[PATCH] end of methods switch: remove the old ones
[PATCH] switch sr
[PATCH] switch sd
[PATCH] switch ide-scsi
[PATCH] switch tape_block
[PATCH] switch dcssblk
[PATCH] switch dasd
[PATCH] switch mtd_blkdevs
[PATCH] switch mmc
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Now we can switch blkdev_ioctl() block_device/mode
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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* get rid of fake struct file/struct dentry in __blkdev_get()
* merge __blkdev_get() and do_open()
* get rid of flags argument of blkdev_get()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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replace open_bdev_excl/close_bdev_excl with variants taking fmode_t.
superblock gets the value used to mount it stored in sb->s_mode
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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To keep the size of changesets sane we split the switch by drivers;
to keep the damn thing bisectable we do the following:
1) rename the affected methods, add ones with correct
prototypes, make (few) callers handle both. That's this changeset.
2) for each driver convert to new methods. *ALL* drivers
are converted in this series.
3) kill the old (renamed) methods.
Note that it _is_ a flagday; all in-tree drivers are converted and by the
end of this series no trace of old methods remain. The only reason why
we do that this way is to keep the damn thing bisectable and allow per-driver
debugging if anything goes wrong.
New methods:
open(bdev, mode)
release(disk, mode)
ioctl(bdev, mode, cmd, arg) /* Called without BKL */
compat_ioctl(bdev, mode, cmd, arg)
locked_ioctl(bdev, mode, cmd, arg) /* Called with BKL, legacy */
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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store needed information in f_mode
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (46 commits)
[PATCH] fs: add a sanity check in d_free
[PATCH] i_version: remount support
[patch] vfs: make security_inode_setattr() calling consistent
[patch 1/3] FS_MBCACHE: don't needlessly make it built-in
[PATCH] move executable checking into ->permission()
[PATCH] fs/dcache.c: update comment of d_validate()
[RFC PATCH] touch_mnt_namespace when the mount flags change
[PATCH] reiserfs: add missing llseek method
[PATCH] fix ->llseek for more directories
[PATCH vfs-2.6 6/6] vfs: add LOOKUP_RENAME_TARGET intent
[PATCH vfs-2.6 5/6] vfs: remove LOOKUP_PARENT from non LOOKUP_PARENT lookup
[PATCH vfs-2.6 4/6] vfs: remove unnecessary fsnotify_d_instantiate()
[PATCH vfs-2.6 3/6] vfs: add __d_instantiate() helper
[PATCH vfs-2.6 2/6] vfs: add d_ancestor()
[PATCH vfs-2.6 1/6] vfs: replace parent == dentry->d_parent by IS_ROOT()
[PATCH] get rid of on-stack dentry in udf
[PATCH 2/2] anondev: switch to IDA
[PATCH 1/2] anondev: init IDR statically
[JFFS2] Use d_splice_alias() not d_add() in jffs2_lookup()
[PATCH] Optimise NFS readdir hack slightly.
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Hi Al,
remember that debug session we did at KS? You suggested this patch back
then....
From 7751eaf30474b8cbfaea64795805a17eab05ac53 Mon Sep 17 00:00:00 2001
From: Arjan van de Ven <arjan@linux.intel.com>
Date: Tue, 16 Sep 2008 16:51:17 -0700
Subject: [PATCH] fs: add a sanity check in d_free
we're seeing some corruption in the dentry->d_alias list that
appears like a free of an entry still on the list; this patch
adds a WARN_ON() to catch this scenario, as suggested by Al Viro
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
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Call security_inode_setattr() consistetly before inode_change_ok().
It doesn't make sense to try to "optimize" the i_op->setattr == NULL
case, as most filesystem do define their own setattr function.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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Assume you have:
- one or more of ext2/3/4 statically built into your kernel
- none of these with extended attributes enabled and
- want to add onother one of ext2/3/4 modular and with
extended attributes enabled
then you currently have to reboot to use it since this results in
CONFIG_FS_MBCACHE=y.
That's not a common issue, but I just ran into it and since there's no
reason to get a built-in mbcache in this case this patch fixes it.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: Andreas Gruenbacher <agruen@suse.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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For execute permission on a regular files we need to check if file has
any execute bits at all, regardless of capabilites.
This check is normally performed by generic_permission() but was also
added to the case when the filesystem defines its own ->permission()
method. In the latter case the filesystem should be responsible for
performing this check.
Move the check from inode_permission() inside filesystems which are
not calling generic_permission().
Create a helper function execute_ok() that returns true if the inode
is a directory or if any execute bits are present in i_mode.
Also fix up the following code:
- coda control file is never executable
- sysctl files are never executable
- hfs_permission seems broken on MAY_EXEC, remove
- hfsplus_permission is eqivalent to generic_permission(), remove
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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Parameters @hash and @len have been removed since 2.4.3,
now just to delete them.
Signed-off-by: Qinghuang Feng <qhfeng.kernel@gmail.com>
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Daemons that need to be launched while the rootfs is read-only can now
poll /proc/mounts to be notified when their O_RDWR requests may no
longer end in EROFS.
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Neil Brown <neilb@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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Reiserfs currently doesn't set a llseek method for regular files, which
means it will fall back to default_llseek. This means no one can seek
beyond 2 Gigabytes on reiserfs, and that there's not protection vs
the i_size updates from writers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
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With this patch all directory fops instances that have a readdir
that doesn't take the BKL are switched to generic_file_llseek.
Signed-off-by: Christoph Hellwig <hch@lst.de>
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This adds LOOKUP_RENAME_TARGET intent for lookup of rename destination.
LOOKUP_RENAME_TARGET is going to be used like LOOKUP_CREATE. But since
the destination of rename() can be existing directory entry, so it has a
difference. Although that difference doesn't matter in my usage, this
tells it to user of this intent.
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
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lookup_hash() with LOOKUP_PARENT is bogus. And this prepares to add
new intent on those path.
The user of LOOKUP_PARENT intent is nfs only, and it checks whether
nd->flags has LOOKUP_CREATE or LOOKUP_OPEN, so the result is same.
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
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This calls d_move(), so fsnotify_d_instantiate() is unnecessary like
rename path.
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
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This adds __d_instantiate() for users which is already taking
dcache_lock, and replace with it.
The part of d_add_ci() isn't equivalent. But it should be needed
fsnotify_d_instantiate() actually, because the path is to add the
inode to negative dentry. fsnotify_d_instantiate() should be called
after change from negative to positive.
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
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This adds d_ancestor() instead of d_isparent(), then use it.
If new_dentry == old_dentry, is_subdir() returns 1, looks strange.
"new_dentry == old_dentry" is not subdir obviously. But I'm not
checking callers for now, so this keeps current behavior.
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
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Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
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Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
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Now that JFFS2 can be exported by NFS, we need to get this right.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Avoid calling the underlying ->readdir() again when we reached the end
already; keep going round the loop only if we stopped due to our own
buffer being full.
[AV: tidy the things up a bit, while we are there]
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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It's not the final state, but it allows moving ->readdir() instances
to passing filldir return value to caller of vfs_readdir().
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Better pass parent and qstr to ext3_find_entry() explicitly than
use such kludges, especially since the stack footprint is nasty
enough and we have every chance to be deep in call chain.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Now that the readdir/lookup deadlock issues have been dealt with, we can
export JFFS2 file systems again.
(For now, you have to specify fsid manually; we should add a method to
the export_ops to handle that too.)
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Now that we've moved the readdir hack to the nfsd code, we can
remove the local version from the XFS code.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Some file systems with their own internal locking have problems with the
way that nfsd calls the ->lookup() method from within a filldir function
called from their ->readdir() method. The recursion back into the file
system code can cause deadlock.
XFS has a fairly hackish solution to this which involves doing the
readdir() into a locally-allocated buffer, then going back through it
calling the filldir function afterwards. It's not ideal, but it works.
It's particularly suboptimal because XFS does this for local file
systems too, where it's completely unnecessary.
Copy this hack into the NFS code where it can be used only for NFS
export. In response to feedback, use it unconditionally rather than only
for the affected file systems.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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