linux/fs/nfs
David Howells ea5b778a8b Unexport do_add_mount() and add in follow_automount(), not ->d_automount()
Unexport do_add_mount() and make ->d_automount() return the vfsmount to be
added rather than calling do_add_mount() itself.  follow_automount() will then
do the addition.

This slightly complicates things as ->d_automount() normally wants to add the
new vfsmount to an expiration list and start an expiration timer.  The problem
with that is that the vfsmount will be deleted if it has a refcount of 1 and
the timer will not repeat if the expiration list is empty.

To this end, we require the vfsmount to be returned from d_automount() with a
refcount of (at least) 2.  One of these refs will be dropped unconditionally.
In addition, follow_automount() must get a 3rd ref around the call to
do_add_mount() lest it eat a ref and return an error, leaving the mount we
have open to being expired as we would otherwise have only 1 ref on it.

d_automount() should also add the the vfsmount to the expiration list (by
calling mnt_set_expiry()) and start the expiration timer before returning, if
this mechanism is to be used.  The vfsmount will be unlinked from the
expiration list by follow_automount() if do_add_mount() fails.

This patch also fixes the call to do_add_mount() for AFS to propagate the mount
flags from the parent vfsmount.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-15 20:07:48 -05:00
..
cache_lib.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
cache_lib.h NFS: Add a dns resolver for use with NFSv4 referrals and migration 2009-08-19 18:22:15 -04:00
callback.c NFS rename client back channel transport field 2011-01-06 14:46:25 -05:00
callback.h pnfs: update nfs4_callback_recallany to handle layouts 2011-01-06 14:46:32 -05:00
callback_proc.c pnfs: update nfs4_callback_recallany to handle layouts 2011-01-06 14:46:32 -05:00
callback_xdr.c pnfs: CB_LAYOUTRECALL xdr code 2011-01-06 14:46:32 -05:00
client.c NFS: Move cl_delegations to the nfs_server struct 2011-01-06 14:57:46 -05:00
delegation.c NFS: Move cl_delegations to the nfs_server struct 2011-01-06 14:57:46 -05:00
delegation.h NFS: Move cl_delegations to the nfs_server struct 2011-01-06 14:57:46 -05:00
dir.c NFS: Use d_automount() rather than abusing follow_link() 2011-01-15 20:07:34 -05:00
direct.c Pure nfs client performance using odirect. 2010-11-22 13:24:42 -05:00
dns_resolve.c sunrpc: use seconds since boot in expiry cache 2010-09-07 19:21:20 -04:00
dns_resolve.h NFS: Use kernel DNS resolver [ver #2] 2010-08-11 17:11:28 +00:00
file.c NFS: Fix fcntl F_GETLK not reporting some conflicts 2010-12-07 19:30:43 -05:00
fscache-index.c NFS: Add read context retention for FS-Cache to call back with 2009-04-03 16:42:44 +01:00
fscache.c NFS: Squelch compiler warning 2010-05-14 15:09:31 -04:00
fscache.h NFS: Propagate 'fsc' mount option through automounts 2009-09-23 14:36:39 -04:00
getroot.c switch nfs to ->s_d_op 2011-01-12 20:02:45 -05:00
idmap.c nfs: fix mispelling of idmap CONFIG symbol 2011-01-04 13:10:39 -05:00
inode.c NFS: Use d_automount() rather than abusing follow_link() 2011-01-15 20:07:34 -05:00
internal.h NFS: Use d_automount() rather than abusing follow_link() 2011-01-15 20:07:34 -05:00
iostat.h NFS: Squelch compiler warning in nfs_add_server_stats() 2010-05-14 15:09:31 -04:00
Kconfig lockd: push lock_flocks down 2010-10-27 21:39:39 +02:00
Makefile NFSv4.1: pnfs: filelayout: add driver's LAYOUTGET and GETDEVICEINFO infrastructure 2010-10-24 18:07:11 -04:00
mount_clnt.c NFS: Remove redundant unlikely() 2010-12-21 11:51:23 -05:00
namespace.c Unexport do_add_mount() and add in follow_automount(), not ->d_automount() 2011-01-15 20:07:48 -05:00
nfs2xdr.c Merge branch 'bugfixes' into nfs-for-2.6.38 2011-01-10 14:48:02 -05:00
nfs3acl.c NFS: Reduce stack footprint of nfs3_proc_getacl() and nfs3_proc_setacl() 2010-05-14 15:09:28 -04:00
nfs3proc.c NFS: readdir with vmapped pages 2010-10-23 15:27:35 -04:00
nfs3xdr.c Merge branch 'bugfixes' into nfs-for-2.6.38 2011-01-10 14:48:02 -05:00
nfs4_fs.h NFS: Move cl_state_owners and related fields to the nfs_server struct 2011-01-06 14:47:57 -05:00
nfs4filelayout.c pnfs: add prefix to struct pnfs_layout_hdr fields 2011-01-06 14:46:31 -05:00
nfs4filelayout.h NFSv4.1: pnfs: filelayout: add driver's LAYOUTGET and GETDEVICEINFO infrastructure 2010-10-24 18:07:11 -04:00
nfs4filelayoutdev.c NFSv4.1: pnfs: filelayout: add driver's LAYOUTGET and GETDEVICEINFO infrastructure 2010-10-24 18:07:11 -04:00
nfs4namespace.c NFSv4: Fix up the documentation for nfs_do_refmount 2010-05-14 15:09:29 -04:00
nfs4proc.c NFS fix the setting of exchange id flag 2011-01-11 14:17:09 -05:00
nfs4renewd.c NFS: Move cl_delegations to the nfs_server struct 2011-01-06 14:57:46 -05:00
nfs4state.c NFS: Move cl_state_owners and related fields to the nfs_server struct 2011-01-06 14:47:57 -05:00
nfs4xdr.c Merge branch 'bugfixes' into nfs-for-2.6.38 2011-01-10 14:48:02 -05:00
nfsroot.c NFS: Fix a compile issue in nfs_root 2010-10-26 13:56:42 -04:00
pagelist.c nfs: Take advantage of kmem_cache_zalloc() in nfs_page_alloc() 2010-12-21 11:51:24 -05:00
pnfs.c pnfs: layout roc code 2011-01-06 14:46:32 -05:00
pnfs.h pnfs: layout roc code 2011-01-06 14:46:32 -05:00
proc.c NFS: Don't leak in nfs_proc_symlink() 2011-01-04 13:10:36 -05:00
read.c nfs: remove extraneous and problematic calls to nfs_clear_request 2010-12-07 23:02:44 -05:00
super.c switch nfs to ->s_d_op 2011-01-12 20:02:45 -05:00
symlink.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
sysctl.c NFS: new idmapper 2010-10-07 18:48:49 -04:00
unlink.c Merge branch 'nfs-for-2.6.38' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6 2011-01-11 15:11:56 -08:00
write.c nfs: remove extraneous and problematic calls to nfs_clear_request 2010-12-07 23:02:44 -05:00