14 Dec, 2006
1 commit
-
Add "relatime" (relative atime) support. Relative atime only updates the
atime if the previous atime is older than the mtime or ctime. Like
noatime, but useful for applications like mutt that need to know when a
file has been read since it was last modified.A corresponding patch against mount(8) is available at
http://userweb.kernel.org/~akpm/mount-relative-atime.txtSigned-off-by: Valerie Henson
Cc: Mark Fasheh
Cc: Al Viro
Cc: Christoph Hellwig
Cc: Karel Zak
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Dec, 2006
1 commit
-
Rename 'struct namespace' to 'struct mnt_namespace' to avoid confusion with
other namespaces being developped for the containers : pid, uts, ipc, etc.
'namespace' variables and attributes are also renamed to 'mnt_ns'Signed-off-by: Kirill Korotaev
Signed-off-by: Cedric Le Goater
Cc: Eric W. Biederman
Cc: Herbert Poetzl
Cc: Sukadev Bhattiprolu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
08 Dec, 2006
1 commit
-
Replace all uses of kmem_cache_t with struct kmem_cache.
The patch was generated using the following script:
#!/bin/sh
#
# Replace one string by another in all the kernel sources.
#set -e
for file in `find * -name "*.c" -o -name "*.h"|xargs grep -l $1`; do
quilt add $file
sed -e "1,\$s/$1/$2/g" $file >/tmp/$$
mv /tmp/$$ $file
quilt refresh
doneThe script was run like this
sh replace kmem_cache_t "struct kmem_cache"
Signed-off-by: Christoph Lameter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
02 Oct, 2006
1 commit
-
This moves the mount namespace into the nsproxy. The mount namespace count
now refers to the number of nsproxies point to it, rather than the number of
tasks. As a result, the unshare_namespace() function in kernel/fork.c no
longer checks whether it is being shared.Signed-off-by: Serge Hallyn
Cc: Kirill Korotaev
Cc: "Eric W. Biederman"
Cc: Herbert Poetzl
Cc: Andrey Savochkin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
01 Oct, 2006
1 commit
-
Create a new header file, fs/internal.h, for common definitions local to the
sources in the fs/ directory.Move extern definitions that should be in header files from fs/*.c to
fs/internal.h or other main header files where they span directories.Signed-Off-By: David Howells
Signed-off-by: Jens Axboe
30 Sep, 2006
1 commit
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Check and handle init errors.
Signed-off-by: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
26 Sep, 2006
1 commit
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Don't be crufty. Mark it __must_check too.
Cc: "Randy.Dunlap"
Signed-off-by: Andrew Morton
Signed-off-by: Greg Kroah-Hartman
01 Jul, 2006
1 commit
-
Signed-off-by: Jörn Engel
Signed-off-by: Adrian Bunk
27 Jun, 2006
1 commit
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This patch converts the combination of list_del(A) and list_add(A, B) to
list_move(A, B).Cc: Greg Kroah-Hartman
Cc: Ram Pai
Signed-off-by: Akinobu Mita
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
25 Jun, 2006
1 commit
-
Conflicts:
fs/nfs/inode.c
fs/super.cFix conflicts between patch 'NFS: Split fs/nfs/inode.c' and patch
'VFS: Permit filesystem to override root dentry on mount'
23 Jun, 2006
1 commit
-
Extend the get_sb() filesystem operation to take an extra argument that
permits the VFS to pass in the target vfsmount that defines the mountpoint.The filesystem is then required to manually set the superblock and root dentry
pointers. For most filesystems, this should be done with simple_set_mnt()
which will set the superblock pointer and then set the root dentry to the
superblock's s_root (as per the old default behaviour).The get_sb() op now returns an integer as there's now no need to return the
superblock pointer.This patch permits a superblock to be implicitly shared amongst several mount
points, such as can be done with NFS to avoid potential inode aliasing. In
such a case, simple_set_mnt() would not be called, and instead the mnt_root
and mnt_sb would be set directly.The patch also makes the following changes:
(*) the get_sb_*() convenience functions in the core kernel now take a vfsmount
pointer argument and return an integer, so most filesystems have to change
very little.(*) If one of the convenience function is not used, then get_sb() should
normally call simple_set_mnt() to instantiate the vfsmount. This will
always return 0, and so can be tail-called from get_sb().(*) generic_shutdown_super() now calls shrink_dcache_sb() to clean up the
dcache upon superblock destruction rather than shrink_dcache_anon().This is required because the superblock may now have multiple trees that
aren't actually bound to s_root, but that still need to be cleaned up. The
currently called functions assume that the whole tree is rooted at s_root,
and that anonymous dentries are not the roots of trees which results in
dentries being left unculled.However, with the way NFS superblock sharing are currently set to be
implemented, these assumptions are violated: the root of the filesystem is
simply a dummy dentry and inode (the real inode for '/' may well be
inaccessible), and all the vfsmounts are rooted on anonymous[*] dentries
with child trees.[*] Anonymous until discovered from another tree.
(*) The documentation has been adjusted, including the additional bit of
changing ext2_* into foo_* in the documentation.[akpm@osdl.org: convert ipath_fs, do other stuff]
Signed-off-by: David Howells
Acked-by: Al Viro
Cc: Nathan Scott
Cc: Roland Dreier
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Jun, 2006
2 commits
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Allow filesystems to decide to perform pre-umount processing whether or not
MNT_FORCE is set.Signed-off-by: Trond Myklebust
-
Allow a submount to be marked as being 'shrinkable' by means of the
vfsmount->mnt_flags, and then add a function 'shrink_submounts()' which
attempts to recursively unmount these submounts.Signed-off-by: Trond Myklebust
16 May, 2006
1 commit
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Revert commit f6422f17d3a480f21917a3895e2a46b968f56a08, due to
Valdis.Kletnieks@vt.edu wrote:
>
> There seems to have been a bug introduced in this changeset:
>
> Am running 2.6.17-rc3-mm1. When this changeset is applied, 'mount --bind'
> misbehaves:
>
> > # mkdir /foo
> > # mount -t tmpfs -o rw,nosuid,nodev,noexec,noatime,nodiratime none /foo
> > # mkdir /foo/bar
> > # mount --bind /foo/bar /foo
> > # tail -2 /proc/mounts
> > none /foo tmpfs rw,nosuid,nodev,noexec,noatime,nodiratime 0 0
> > none /foo tmpfs rw 0 0
>
> Reverting this changeset causes both mounts to have the same options.
>
> (Thanks to Stephen Smalley for tracking down the changeset...)
>Cc: Herbert Poetzl
Cc: Christoph Hellwig
Cc:
Cc: Stephen Smalley
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
11 Apr, 2006
1 commit
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The mnt_flags are propagated into do_loopback(), so that they can be stored
with the vfsmountSigned-off-by: Herbert Poetzl
Acked-by: Christoph Hellwig
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
28 Mar, 2006
1 commit
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Change the functions may_umount and may_umount_tree to boolean functions to
aid code readability.Signed-off-by: Ian Kent
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
27 Mar, 2006
1 commit
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I discovered on oprofile hunting on a SMP platform that dentry lookups were
slowed down because d_hash_mask, d_hash_shift and dentry_hashtable were in
a cache line that contained inodes_stat. So each time inodes_stats is
changed by a cpu, other cpus have to refill their cache line.This patch moves some variables to the __read_mostly section, in order to
avoid false sharing. RCU dentry lookups can go full speed.Signed-off-by: Eric Dumazet
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
21 Mar, 2006
1 commit
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Create a new file under /proc/self, called mountstats, where mounted file
systems can export information (configuration options, performance counters,
and so on). Use a mechanism similar to /proc/mounts and s_ops->show_options.This mechanism does not violate namespace security, and is safe to use while
other processes are unmounting file systems.Thanks to Mike Waychison for his review and comments.
Test-plan:
Test concurrent mount/unmount operations while cat'ing /proc/self/mountstats.Signed-off-by: Chuck Lever
Signed-off-by: Trond Myklebust
16 Mar, 2006
1 commit
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The Coverity checker spotted the following bug in dup_namespace():
if (!new_ns->root) {
up_write(&namespace_sem);
kfree(new_ns);
goto out;
}
...
out:
return new_ns;Callers expect a non-NULL result to not be freed.
Signed-off-by: Adrian Bunk
Signed-off-by: Linus Torvalds
08 Feb, 2006
2 commits
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Signed-off-by: Al Viro
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If the namespace structure is being shared, allocate a new one and copy
information from the current, shared, structure.Signed-off-by: Janak Desai
Cc: Al Viro
Cc: Christoph Hellwig
Cc: Michael Kerrisk
Cc: Andi Kleen
Cc: Paul Mackerras
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Jan, 2006
1 commit
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This patch adds an empty /sys/fs, which filesystems can use.
Signed-off-by: Miklos Szeredi
Cc: Greg KH
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
12 Jan, 2006
1 commit
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fs: Use where capable() is used.
Signed-off-by: Randy Dunlap
Acked-by: Tim Schmielau
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
11 Jan, 2006
1 commit
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Turn noatime and nodiratime into per-mount instead of per-sb flags.
After all the preparations this is a rather trivial patch. The mount code
needs to treat the two options as per-mount instead of per-superblock, and
touch_atime needs to be changed to check the new MNT_ flags in addition to
the MS_ flags that are kept for filesystems that are always
noatime/nodiratime but not user settable anymore. Besides that core code
only nfs needed an update because it's leaving atime updates to the server
and thus sets the S_NOATIME flag on every inode, but needs to know whether
it's a real noatime mount for an getattr optimization.While we're at it I've killed the IS_NOATIME/IS_NODIRATIME macros that were
only used by touch_atime.Signed-off-by: Christoph Hellwig
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
10 Jan, 2006
1 commit
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This patch converts the inode semaphore to a mutex. I have tested it on
XFS and compiled as much as one can consider on an ia64. Anyway your
luck with it might be different.Modified-by: Ingo Molnar
(finished the conversion)
Signed-off-by: Jes Sorensen
Signed-off-by: Ingo Molnar
09 Jan, 2006
2 commits
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Small cleanups in shared mounts code.
Signed-off-by: Miklos Szeredi
Cc: Ram Pai
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Neil Brown
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Nov, 2005
1 commit
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Most permission() calls have a struct nameidata * available. This helper
takes that as an argument and thus makes sure we pass it down for lookup
intents and prepares for per-mount read-only support where we need a struct
vfsmount for checking whether a file is writeable.Signed-off-by: Christoph Hellwig
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
08 Nov, 2005
12 commits
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An unbindable mount does not forward or receive propagation. Also
unbindable mount disallows bind mounts. The semantics is as follows.Bind semantics:
It is invalid to bind mount an unbindable mount.Move semantics:
It is invalid to move an unbindable mount under shared mount.Clone-namespace semantics:
If a mount is unbindable in the parent namespace, the corresponding
cloned mount in the child namespace becomes unbindable too. Note:
there is subtle difference, unbindable mounts cannot be bind mounted
but can be cloned during clone-namespace.Signed-off-by: Ram Pai
Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds -
This makes bind, rbind, move, clone namespace and umount operations
aware of the semantics of slave mount (see Documentation/sharedsubtree.txt
in the last patch of the series for detailed description).Signed-off-by: Ram Pai
Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds -
A slave mount always has a master mount from which it receives
mount/umount events. Unlike shared mount the event propagation does not
flow from the slave mount to the master.Signed-off-by: Ram Pai
Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds -
An unmount of a mount creates a umount event on the parent. If the
parent is a shared mount, it gets propagated to all mounts in the peer
group.Signed-off-by: Ram Pai
Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds -
Implement handling of mount --move in presense of shared mounts (see
Documentation/sharedsubtree.txt in the end of patch series for detailed
description).Signed-off-by: Ram Pai
Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds -
Implement handling of MS_BIND in presense of shared mounts (see
Documentation/sharedsubtree.txt in the end of patch series for detailed
description).Signed-off-by: Ram Pai
Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds -
This creates shared mounts. A shared mount when bind-mounted to some
mountpoint, propagates mount/umount events to each other. All the
shared mounts that propagate events to each other belong to the same
peer-group.Signed-off-by: Ram Pai
Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds -
A private mount does not forward or receive propagation. This patch
provides user the ability to convert any mount to private.Signed-off-by: Ram Pai
Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds -
This removes the per-namespace semaphore in favor of a global semaphore.
This can have an effect on namespace scalability.Signed-off-by: Miklos Szeredi
Signed-off-by: Ram Pai
Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds -
- clean up the ugliness in may_umount_tree()
- fix a bug in do_loopback(). after cloning a tree, do_loopback()
unlinks only the topmost mount of the cloned tree, leaving behind the
children mounts on their corresponding expiry list.Signed-off-by: Ram Pai
Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds -
umount is done under the protection of the namespace semaphore. This
can lead to intresting deadlocks when the last reference to a mount is
released, if filesystem code is in sufficiently nasty state.This collects all the to-be-released-mounts and releases them after
releasing the namespace semaphore. That both reduces the time we are
holding namespace semaphore and gets the things more robust.Idea proposed by Al Viro.
Signed-off-by: Ram Pai
Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds -
Old semantics: graft_tree() grabs a reference on the vfsmount before
returning success.New one: graft_tree() leaves that to caller.
All the callers of graft_tree() immediately dropped that reference
anyway. Changing the interface takes care of this unnecessary overhead.Idea proposed by Al Viro.
Signed-off-by: Ram Pai
Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds
