get rid of magic in proc_namespace.c

don't rely on proc_mounts->m being the first field; container_of()
is there for purpose. No need to bother with ->private, while
we are at it -

get rid of magic in proc_namespace.c

don't rely on proc_mounts->m being the first field; container_of()
is there for purpose. No need to bother with ->private, while
we are at it - the same container_of will do nicely.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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get rid of ->mnt_longterm

it's enough to set ->mnt_ns of internal vfsmounts to something
distinct from all struct mnt_namespace out there; then we can
just use the check for ->mnt_ns

get rid of ->mnt_longterm

it's enough to set ->mnt_ns of internal vfsmounts to something
distinct from all struct mnt_namespace out there; then we can
just use the check for ->mnt_ns != NULL in the fast path of
mntput_no_expire()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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vfs: keep list of mounts for each superblock

Keep track of vfsmounts belonging to a superblock. List is protected
by vfsmount_lock.

Signed-off-by: Miklos Szeredi <mszeredi@suse

vfs: keep list of mounts for each superblock

Keep track of vfsmounts belonging to a superblock. List is protected
by vfsmount_lock.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Tested-by: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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switch mnt_namespace ->root to struct mount

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: take /proc/*/mounts and friends to fs/proc_namespace.c

rationale: that stuff is far tighter bound to fs/namespace.c than to
the guts of procfs proper.

Signed-off-by: Al Vir

vfs: take /proc/*/mounts and friends to fs/proc_namespace.c

rationale: that stuff is far tighter bound to fs/namespace.c than to
the guts of procfs proper.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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vfs: move fsnotify junk to struct mount

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: move mnt_devname

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: move mnt_list to struct mount

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: move the rest of int fields to struct mount

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: mnt_id/mnt_group_id moved

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: mnt_ns moved to struct mount

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: take mnt_share/mnt_slave/mnt_slave_list and mnt_expire to struct mount

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: and now we can make ->mnt_master point to struct mount

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: take mnt_master to struct mount

make IS_MNT_SLAVE take struct mount * at the same time

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: take mnt_child/mnt_mounts to struct mount

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: all counters taken to struct mount

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: move mnt_mountpoint to struct mount

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: now it can be done - make mnt_parent point to struct mount

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: mnt_parent moved to struct mount

the second victim...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: spread struct mount - mnt_has_parent

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: the first spoils - mnt_hash moved

taken out of struct vfsmount into struct mount

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: spread struct mount - __lookup_mnt() result

switch __lookup_mnt() to returning struct mount *; callers adjusted.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: start hiding vfsmount guts series

Almost all fields of struct vfsmount are used only by core VFS (and
a fairly small part of it, at that). The plan: embed struct vfsmount
into

vfs: start hiding vfsmount guts series

Almost all fields of struct vfsmount are used only by core VFS (and
a fairly small part of it, at that). The plan: embed struct vfsmount
into struct mount, making the latter visible only to core parts of VFS.
Then move fields from vfsmount to mount, eventually leaving only
mnt_root/mnt_sb/mnt_flags in struct vfsmount. Filesystem code still
gets pointers to struct vfsmount and remains unchanged; all such
pointers go to struct vfsmount embedded into the instances of struct
mount allocated by fs/namespace.c. When fs/namespace.c et.al. get
a pointer to vfsmount, they turn it into pointer to mount (using
container_of) and work with that.

This is the first part of series; struct mount is introduced,
allocation switched to using it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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vfs: new internal helper: mnt_has_parent(mnt)

vfsmounts have ->mnt_parent pointing either to a different vfsmount
or to itself; it's never NULL and termination condition in loops
tra

vfs: new internal helper: mnt_has_parent(mnt)

vfsmounts have ->mnt_parent pointing either to a different vfsmount
or to itself; it's never NULL and termination condition in loops
traversing the tree towards root is mnt == mnt->mnt_parent. At least
one place (see the next patch) is confused about what's going on;
let's add an explicit helper checking it right way and use it in
all places where we need it. Not that there had been too many,
but...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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