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* vfs: now it can be done - make mnt_parent point to struct mountAl Viro2012-01-035-50/+53
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: mnt_parent moved to struct mountAl Viro2012-01-036-29/+30
| | | | | | the second victim... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: spread struct mount - is_path_reachableAl Viro2012-01-033-13/+13
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: spread struct mount - mnt_has_parentAl Viro2012-01-033-12/+13
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: spread struct mount - do_umount/propagate_mount_busyAl Viro2012-01-033-23/+23
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: spread struct mount mnt_set_mountpoint child argumentAl Viro2012-01-033-7/+7
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: spread struct mount - clone_mnt/copy_tree argumentAl Viro2012-01-033-32/+35
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: spread struct mount - shrink_submounts/select_submountsAl Viro2012-01-031-14/+14
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: spread struct mount - umount_tree argumentAl Viro2012-01-033-20/+20
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: the first spoils - mnt_hash movedAl Viro2012-01-034-18/+18
| | | | | | taken out of struct vfsmount into struct mount Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: spread struct mount to remaining users of ->mnt_hashAl Viro2012-01-031-13/+13
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: spread struct mount - clone_mnt/copy_tree resultAl Viro2012-01-033-26/+30
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: spread struct mount - change_mnt_propagation/set_mnt_sharedAl Viro2012-01-033-14/+14
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: spread struct mount - alloc_vfsmnt/free_vfsmnt/mnt_alloc_id/mnt_free_idAl Viro2012-01-031-41/+40
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: spread struct mount - tree_contains_unbindableAl Viro2012-01-031-3/+3
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: spread struct mount - attach_recursive_mntAl Viro2012-01-031-11/+14
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: spread struct mount - mount group id handlingAl Viro2012-01-033-20/+20
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: spread struct mount - commit_treeAl Viro2012-01-031-9/+9
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: spread struct mount - attach_mnt/detach_mntAl Viro2012-01-031-19/+22
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: spread struct mount - namespace.c internal iteratorsAl Viro2012-01-031-71/+74
| | | | | | | next_mnt() return value, first argument skip_mnt_tree() return value and argument Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: spread struct mount - __propagate_umount() argumentAl Viro2012-01-031-7/+7
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: spread struct mount - __lookup_mnt() resultAl Viro2012-01-035-22/+31
| | | | | | switch __lookup_mnt() to returning struct mount *; callers adjusted. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: start hiding vfsmount guts seriesAl Viro2012-01-032-8/+19
| | | | | | | | | | | | | | | | | | 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>
* vfs: fix the rest of sget() racesAl Viro2012-01-031-7/+13
| | | | | | | | | | | | | | | | | 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>
* vfs: new helper - vfs_ustat()Al Viro2012-01-035-26/+17
| | | | | | | ... and bury user_get_super()/statfs_by_dentry() - they are purely internal now. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: live vfsmounts never have NULL ->mnt_sbAl Viro2012-01-032-4/+3
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: for usbfs, etc. internal vfsmounts ->mnt_sb->s_root == ->mnt_rootAl Viro2012-01-036-8/+8
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* get rid of timer in kern/acct.cAl Viro2012-01-031-30/+10
| | | | | | ... and clean it up a bit, while we are at it Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: pipe.c is really non-modularAl Viro2012-01-031-7/+0
| | | | | | | ... 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>
* vfs: fix the stupidity with i_dentry in inode destructorsAl Viro2012-01-0353-55/+1
| | | | | | | | | | 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>
* vfs: mnt_drop_write_file()Al Viro2012-01-0322-48/+55
| | | | | | | 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>
* constify seq_file stuffAl Viro2012-01-032-10/+10
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: make do_kern_mount() staticAl Viro2012-01-032-5/+1
| | | | | | the only user outside of fs/namespace.c has died Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: convert fs_supers to hlistAl Viro2012-01-033-15/+16
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* make nfs_follow_remote_path() handle ERR_PTR() passed as root_mntAl Viro2012-01-031-9/+9
| | | | | | ... rather than duplicating that in callers Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: kill ->mnt_devname use in afs printksAl Viro2012-01-031-2/+2
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* btrfs, nfs, apparmor: don't pull mnt_namespace.h for no reason...Al Viro2012-01-033-3/+0
| | | | | | | | 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>
* tomoyo: stop including hell knows whatAl Viro2012-01-031-8/+0
| | | | | | | | | | tomoyo/realpath.c needs exactly one include - that of common.h. It pulls everything the thing needs, without doing ridiculous garbage such as trying to include ../../fs/internal.h. If that alone doesn't scream "layering violation", I don't know what does; and these days it's all for nothing, since it fortunately does not use any symbols defined in there... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: dentry_reset_mounted() doesn't use vfsmount argumentAl Viro2012-01-031-3/+3
| | | | | | lose it Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* unexport put_mnt_ns(), make create_mnt_ns() static outrightAl Viro2012-01-032-4/+1
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: add missing parens in pnode.h macrosAl Viro2012-01-031-5/+5
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: more mnt_parent cleanupsAl Viro2012-01-034-55/+29
| | | | | | | | | | | | 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>
* vfs: new internal helper: mnt_has_parent(mnt)Al Viro2012-01-035-12/+18
| | | | | | | | | | | | 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>
* vfs: kill pointless helpers in namespace.cAl Viro2012-01-031-30/+5
| | | | | | | mnt_{inc,dec}_count() is not cleaner than doing the corresponding mnt_add_count() directly and mnt_set_count() is not used at all. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* new helpers: fh_{want,drop}_write()Al Viro2012-01-033-19/+29
| | | | | | | A bunch of places in nfsd does mnt_{want,drop}_write on vfsmount of export of given fhandle. Switched to obvious inlined helpers... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* switch a bunch of places to mnt_want_write_file()Al Viro2012-01-0316-42/+42
| | | | | | it's both faster (in case when file has been opened for write) and cleaner. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* trim fs/internal.hAl Viro2012-01-035-28/+15
| | | | | | | some stuff in there can actually become static; some belongs to pnode.h as it's a private interface between namespace.c and pnode.c... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* pull manipulations of rpc_cred inside alloc_nfs_open_context()Al Viro2012-01-033-33/+22
| | | | | | | | | No need to duplicate them in both callers; make it return ERR_PTR(-ENOMEM) on allocation failure instead of NULL and it'll be able to report rpc_lookup_cred() failures just fine. Callers are much happier that way... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Revert "rtc: Disable the alarm in the hardware"Linus Torvalds2012-01-031-34/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit c0afabd3d553c521e003779c127143ffde55a16f. It causes failures on Toshiba laptops - instead of disabling the alarm, it actually seems to enable it on the affected laptops, resulting in (for example) the laptop powering on automatically five minutes after shutdown. There's a patch for it that appears to work for at least some people, but it's too late to play around with this, so revert for now and try again in the next merge window. See for example http://bugs.debian.org/652869 Reported-and-bisected-by: Andreas Friedrich <afrie@gmx.net> (Toshiba Tecra) Reported-by: Antonio-M. Corbi Bellot <antonio.corbi@ua.es> (Toshiba Portege R500) Reported-by: Marco Santos <marco.santos@waynext.com> (Toshiba Portege Z830) Reported-by: Christophe Vu-Brugier <cvubrugier@yahoo.fr> (Toshiba Portege R830) Cc: Jonathan Nieder <jrnieder@gmail.com> Requested-by: John Stultz <john.stultz@linaro.org> Cc: stable@kernel.org # for the versions that applied this Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* hung_task: fix false positive during vforkMandeep Singh Baines2012-01-031-4/+10
| | | | | | | | | | | | | | | | | vfork parent uninterruptibly and unkillably waits for its child to exec/exit. This wait is of unbounded length. Ignore such waits in the hung_task detector. Signed-off-by: Mandeep Singh Baines <msb@chromium.org> Reported-by: Sasha Levin <levinsasha928@gmail.com> LKML-Reference: <1325344394.28904.43.camel@lappy> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: John Kacur <jkacur@redhat.com> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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