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32301920f4
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25033 Commits

Author SHA1 Message Date
Al Viro
32301920f4 vfs: and now we can make ->mnt_master point to struct mount 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:08 -05:00
Al Viro
d10e8def07 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>
 2012-01-03 22:57:08 -05:00
Al Viro
14cf1fa8f5 vfs: spread struct mount - remaining argument of mnt_set_mountpoint() 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:07 -05:00
Al Viro
a8d56d8e4f vfs: spread struct mount - propagate_mnt() 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:07 -05:00
Al Viro
c937135d98 vfs: spread struct mount - shared subtree iterators 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:07 -05:00
Al Viro
6fc7871fed vfs: spread struct mount - get_dominating_id / do_make_slave 
next pile of horrors, similar to mnt_parent one; this time it's
mnt_master.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:06 -05:00
Al Viro
6b41d536f7 vfs: take mnt_child/mnt_mounts to struct mount 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:06 -05:00
Al Viro
68e8a9feab vfs: all counters taken to struct mount 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:06 -05:00
Al Viro
83adc75322 vfs: spread struct mount - work with counters 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:05 -05:00
Al Viro
a73324da7a vfs: move mnt_mountpoint to struct mount 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:05 -05:00
Al Viro
0714a53380 vfs: now it can be done - make mnt_parent point to struct mount 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:05 -05:00
Al Viro
3376f34fff vfs: mnt_parent moved to struct mount 
the second victim...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:04 -05:00
Al Viro
643822b41e vfs: spread struct mount - is_path_reachable 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:04 -05:00
Al Viro
676da58df7 vfs: spread struct mount - mnt_has_parent 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:04 -05:00
Al Viro
1ab5973862 vfs: spread struct mount - do_umount/propagate_mount_busy 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:03 -05:00
Al Viro
44d964d609 vfs: spread struct mount mnt_set_mountpoint child argument 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:03 -05:00
Al Viro
87129cc0e3 vfs: spread struct mount - clone_mnt/copy_tree argument 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:03 -05:00
Al Viro
692afc312b vfs: spread struct mount - shrink_submounts/select_submounts 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:02 -05:00
Al Viro
761d5c38eb vfs: spread struct mount - umount_tree argument 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:02 -05:00
Al Viro
1b8e5564b9 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>
 2012-01-03 22:57:02 -05:00
Al Viro
d5e50f74dd vfs: spread struct mount to remaining users of ->mnt_hash 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:01 -05:00
Al Viro
cb338d06e9 vfs: spread struct mount - clone_mnt/copy_tree result 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:01 -05:00
Al Viro
0f0afb1dcf vfs: spread struct mount - change_mnt_propagation/set_mnt_shared 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:01 -05:00
Al Viro
b105e270b4 vfs: spread struct mount - alloc_vfsmnt/free_vfsmnt/mnt_alloc_id/mnt_free_id 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:00 -05:00
Al Viro
cbbe362cd6 vfs: spread struct mount - tree_contains_unbindable 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:00 -05:00
Al Viro
0fb54e5056 vfs: spread struct mount - attach_recursive_mnt 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:00 -05:00
Al Viro
4b8b21f4fe vfs: spread struct mount - mount group id handling 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:56:59 -05:00
Al Viro
4b2619a571 vfs: spread struct mount - commit_tree 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:56:59 -05:00
Al Viro
419148da6e vfs: spread struct mount - attach_mnt/detach_mnt 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:56:59 -05:00
Al Viro
315fc83e56 vfs: spread struct mount - namespace.c internal iterators 
next_mnt() return value, first argument
skip_mnt_tree() return value and argument

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:56:58 -05:00
Al Viro
61ef47b1e4 vfs: spread struct mount - __propagate_umount() argument 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:56:58 -05:00
Al Viro
c71053659e 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>
 2012-01-03 22:56:58 -05:00
Al Viro
7d6fec45a5 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>
 2012-01-03 22:56:57 -05:00
Al Viro
dabe0dc194 vfs: fix the rest of sget() races 
unfortunately, just checking MS_BORN after having grabbed ->s_umount in
sget() is not enough; places that pick superblock from a list and
grab s_umount shared need the same check in addition to checking for
->s_root; otherwise three-way race between failing mount, sget() and
such list-walker can leave us with list-walker coming *second*, when
temporary active ref grabbed by sget() (to be dropped when sget()
notices that original mount has failed by checking MS_BORN) has
lead to deactivate_locked_super() from failing ->mount() *not* doing
->kill_sb() and just releasing ->s_umount.  Once sget() gets through
and notices that MS_BORN had never been set it will drop the active
ref and fs will be shut down and kicked out of all lists, but it's
too late for something like sync_supers().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:53:10 -05:00
Al Viro
cf31e70d6c vfs: new helper - vfs_ustat() 
... and bury user_get_super()/statfs_by_dentry() - they are
purely internal now.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:53:07 -05:00
Al Viro
c972b4bc83 vfs: live vfsmounts never have NULL ->mnt_sb 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:52:42 -05:00
Al Viro
4c1d5a64f1 vfs: for usbfs, etc. internal vfsmounts ->mnt_sb->s_root == ->mnt_root 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:52:41 -05:00
Al Viro
84b92d39f9 vfs: pipe.c is really non-modular 
... so no exitcalls there.  Not much would work if pipe(2) would stop
working, after all...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:52:41 -05:00
Al Viro
6b520e0565 vfs: fix the stupidity with i_dentry in inode destructors 
Seeing that just about every destructor got that INIT_LIST_HEAD() copied into
it, there is no point whatsoever keeping this INIT_LIST_HEAD in inode_init_once();
the cost of taking it into inode_init_always() will be negligible for pipes
and sockets and negative for everything else.  Not to mention the removal of
boilerplate code from ->destroy_inode() instances...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:52:40 -05:00
Al Viro
2a79f17e4a vfs: mnt_drop_write_file() 
new helper (wrapper around mnt_drop_write()) to be used in pair with
mnt_want_write_file().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:52:40 -05:00
Al Viro
8c9379e972 constify seq_file stuff 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:52:40 -05:00
Al Viro
79e801a906 vfs: make do_kern_mount() static 
the only user outside of fs/namespace.c has died

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:52:39 -05:00
Al Viro
a5166169f9 vfs: convert fs_supers to hlist 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:52:39 -05:00
Al Viro
5352d3b65a make nfs_follow_remote_path() handle ERR_PTR() passed as root_mnt 
... rather than duplicating that in callers

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:52:39 -05:00
Al Viro
5ffc2836a2 vfs: kill ->mnt_devname use in afs printks 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:52:38 -05:00
Al Viro
e407699ef5 btrfs, nfs, apparmor: don't pull mnt_namespace.h for no reason... 
it's not needed anymore; we used to, back when we had to do
mount_subtree() by hand, complete with put_mnt_ns() in it.
No more...  Apparmor didn't need it since the __d_path() fix.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:52:38 -05:00
Al Viro
aa0a4cf0ab vfs: dentry_reset_mounted() doesn't use vfsmount argument 
lose it

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:52:37 -05:00
Al Viro
6c449c8dfe unexport put_mnt_ns(), make create_mnt_ns() static outright 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:52:37 -05:00
Al Viro
aafd08dad0 vfs: add missing parens in pnode.h macros 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:52:37 -05:00
Al Viro
afac7cba7e vfs: more mnt_parent cleanups 
a) mount --move is checking that ->mnt_parent is non-NULL before
looking if that parent happens to be shared; ->mnt_parent is never
NULL and it's not even an misspelled !mnt_has_parent()

b) pivot_root open-codes is_path_reachable(), poorly.

c) so does path_is_under(), while we are at it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:52:36 -05:00