04 Mar, 2010
2 commits
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The handling of mount flags in set_mnt_shared() got a little tangled
up during previous cleanups, with the following problems:* MNT_PNODE_MASK is defined as a literal constant when it should be a
bitwise xor of other MNT_* flags
* set_mnt_shared() clears and then sets MNT_SHARED (part of MNT_PNODE_MASK)
* MNT_PNODE_MASK could use a comment in mount.h
* MNT_PNODE_MASK is a terrible name, change to MNT_SHARED_MASKThis patch fixes these problems.
Signed-off-by: Al Viro
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First of all, get_source() never results in CL_PROPAGATION
alone. We either get CL_MAKE_SHARED (for the continuation
of peer group) or CL_SLAVE (slave that is not shared) or both
(beginning of peer group among slaves). Massage the code to
make that explicit, kill CL_PROPAGATION test in clone_mnt()
(nothing sets CL_MAKE_SHARED without CL_PROPAGATION and in
clone_mnt() we are checking CL_PROPAGATION after we'd found
that there's no CL_SLAVE, so the check for CL_MAKE_SHARED
would do just as well).Fix comments, while we are at it...
Signed-off-by: Al Viro
23 Apr, 2008
1 commit
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Show peer group ID of nearest dominating group that has intersection
with the mount's namespace.Signed-off-by: Miklos Szeredi
Signed-off-by: Al Viro
22 Apr, 2008
1 commit
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Allow ->show() return SEQ_SKIP; that will discard all
output from that element and move on.Signed-off-by: Al Viro
21 Oct, 2007
1 commit
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Get a snapshot of a subtree, creating private clones of vfsmounts
for all its components and release such snapshot resp.Signed-off-by: Al Viro
09 Dec, 2006
1 commit
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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 Nov, 2005
6 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 -
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 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
