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2012-01-04vfs: spread struct mount - shared subtree iteratorsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount - get_dominating_id / do_make_slaveAl Viro
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>
2012-01-04vfs: take mnt_child/mnt_mounts to struct mountAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: all counters taken to struct mountAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount - work with countersAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: move mnt_mountpoint to struct mountAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: now it can be done - make mnt_parent point to struct mountAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: mnt_parent moved to struct mountAl Viro
the second victim... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount - is_path_reachableAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount - mnt_has_parentAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount - do_umount/propagate_mount_busyAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount mnt_set_mountpoint child argumentAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount - clone_mnt/copy_tree argumentAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount - shrink_submounts/select_submountsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount - umount_tree argumentAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: the first spoils - mnt_hash movedAl Viro
taken out of struct vfsmount into struct mount Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount to remaining users of ->mnt_hashAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount - clone_mnt/copy_tree resultAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount - change_mnt_propagation/set_mnt_sharedAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount - alloc_vfsmnt/free_vfsmnt/mnt_alloc_id/mnt_free_idAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount - tree_contains_unbindableAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount - attach_recursive_mntAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount - mount group id handlingAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount - commit_treeAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount - attach_mnt/detach_mntAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount - namespace.c internal iteratorsAl Viro
next_mnt() return value, first argument skip_mnt_tree() return value and argument Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount - __propagate_umount() argumentAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: spread struct mount - __lookup_mnt() resultAl Viro
switch __lookup_mnt() to returning struct mount *; callers adjusted. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: start hiding vfsmount guts seriesAl Viro
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>
2012-01-04vfs: fix the rest of sget() racesAl Viro
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>
2012-01-04vfs: new helper - vfs_ustat()Al Viro
... and bury user_get_super()/statfs_by_dentry() - they are purely internal now. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: live vfsmounts never have NULL ->mnt_sbAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: for usbfs, etc. internal vfsmounts ->mnt_sb->s_root == ->mnt_rootAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: pipe.c is really non-modularAl Viro
... 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>
2012-01-04vfs: fix the stupidity with i_dentry in inode destructorsAl Viro
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>
2012-01-04vfs: mnt_drop_write_file()Al Viro
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>
2012-01-04constify seq_file stuffAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: make do_kern_mount() staticAl Viro
the only user outside of fs/namespace.c has died Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: convert fs_supers to hlistAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04make nfs_follow_remote_path() handle ERR_PTR() passed as root_mntAl Viro
... rather than duplicating that in callers Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: kill ->mnt_devname use in afs printksAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04btrfs, nfs, apparmor: don't pull mnt_namespace.h for no reason...Al Viro
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>
2012-01-04vfs: dentry_reset_mounted() doesn't use vfsmount argumentAl Viro
lose it Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04unexport put_mnt_ns(), make create_mnt_ns() static outrightAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: add missing parens in pnode.h macrosAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-04vfs: more mnt_parent cleanupsAl Viro
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>
2012-01-04vfs: new internal helper: mnt_has_parent(mnt)Al Viro
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>
2012-01-04vfs: kill pointless helpers in namespace.cAl Viro
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>
2012-01-04new helpers: fh_{want,drop}_write()Al Viro
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>
2012-01-04switch a bunch of places to mnt_want_write_file()Al Viro
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>
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