David Howells b797cac748 NFS: Add mount options to enable local caching on NFS ... Add NFS mount options to allow the local caching support to be enabled. The attached patch makes it possible for the NFS filesystem to be told to make use of the network filesystem local caching service (FS-Cache). To be able to use this, a recent nfsutils package is required. There are three variant NFS mount options that can be added to a mount command to control caching for a mount. Only the last one specified takes effect: (*) Adding "fsc" will request caching. (*) Adding "fsc=<string>" will request caching and also specify a uniquifier. (*) Adding "nofsc" will disable caching. For example: mount warthog:/ /a -o fsc The cache of a particular superblock (NFS FSID) will be shared between all mounts of that volume, provided they have the same connection parameters and are not marked 'nosharecache'. Where it is otherwise impossible to distinguish superblocks because all the parameters are identical, but the 'nosharecache' option is supplied, a uniquifying string must be supplied, else only the first mount will be permitted to use the cache. If there's a key collision, then the second mount will disable caching and give a warning into the kernel log. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Steve Dickson <steved@redhat.com> Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Tested-by: Daire Byrne <Daire.Byrne@framestore.com>		2009-04-03 16:42:48 +01:00
..
9p	vfs: simple_set_mnt() should return void	2009-03-27 14:44:03 -04:00
adfs	fs/adfs: return f_fsid for statfs(2)	2009-04-02 19:05:08 -07:00
affs	fs/affs: return f_fsid for statfs(2)	2009-04-02 19:05:08 -07:00
afs	FS-Cache: Make kAFS use FS-Cache	2009-04-03 16:42:41 +01:00
autofs	constify dentry_operations: autofs, autofs4	2009-03-27 14:44:00 -04:00
autofs4	autofs4: fix lookup deadlock	2009-04-01 08:59:23 -07:00
befs	fs/befs: return f_fsid for statfs(2)	2009-04-02 19:05:08 -07:00
bfs	fs/Kconfig: move bfs out	2009-01-22 13:15:57 +03:00
btrfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-04-02 21:09:10 -07:00
cachefiles	CacheFiles: A cache that backs onto a mounted filesystem	2009-04-03 16:42:41 +01:00
cifs	New helper - current_umask()	2009-03-31 23:00:26 -04:00
coda	constify dentry_operations: misc filesystems	2009-03-27 14:44:00 -04:00
configfs	constify dentry_operations: configfs	2009-03-27 14:44:03 -04:00
cramfs	fs/cramfs: return f_fsid for statfs(2)	2009-04-02 19:05:08 -07:00
debugfs
devpts	Merge code for single and multiple-instance mounts	2009-03-27 14:44:04 -04:00
dlm	dlm: fix length calculation in compat code	2009-03-11 12:23:59 -05:00
ecryptfs	ecryptfs: use kzfree()	2009-04-01 08:59:23 -07:00
efs	fs/efs: return f_fsid for statfs(2)	2009-04-02 19:05:09 -07:00
exportfs
ext2	New helper - current_umask()	2009-03-31 23:00:26 -04:00
ext3	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-04-02 21:09:10 -07:00
ext4	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-04-02 21:09:10 -07:00
fat	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-04-02 21:09:10 -07:00
freevxfs	fs/Kconfig: move vxfs out	2009-01-22 13:15:58 +03:00
fscache	FS-Cache: Implement data I/O part of netfs API	2009-04-03 16:42:39 +01:00
fuse	mm: page_mkwrite change prototype to match fault	2009-04-01 08:59:14 -07:00
gfs2	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-04-02 21:09:10 -07:00
hfs	fs/hfs: return f_fsid for statfs(2)	2009-04-02 19:05:09 -07:00
hfsplus	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-04-02 21:09:10 -07:00
hostfs	constify dentry_operations: misc filesystems	2009-03-27 14:44:00 -04:00
hpfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-04-02 21:09:10 -07:00
hppfs	hppfs: hppfs_read_file() may return -ERROR	2009-04-02 19:04:53 -07:00
hugetlbfs	mm: reintroduce and deprecate rlimit based access for SHM_HUGETLB	2009-04-01 08:59:12 -07:00
isofs	fs/isofs: return f_fsid for statfs(2)	2009-04-02 19:05:09 -07:00
jbd	jbd: fix oops in jbd_journal_init_inode() on corrupted fs	2009-04-02 19:04:52 -07:00
jbd2	jbd2: Update locking coments	2009-03-27 17:20:40 -04:00
jffs2	New helper - current_umask()	2009-03-31 23:00:26 -04:00
jfs	New helper - current_umask()	2009-03-31 23:00:26 -04:00
lockd	NSM: Fix unaligned accesses in nsm_init_private()	2009-04-01 13:24:14 -04:00
minix	fs/minix: return f_fsid for statfs(2)	2009-04-02 19:05:09 -07:00
ncpfs	constify dentry_operations: misc filesystems	2009-03-27 14:44:00 -04:00
nfs	NFS: Add mount options to enable local caching on NFS	2009-04-03 16:42:48 +01:00
nfs_common
nfsd	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-04-02 21:09:10 -07:00
nls
notify	fs: avoid I_NEW inodes	2009-03-27 14:44:05 -04:00
ntfs	ntfs: remove private wrapper of endian helpers	2009-04-01 08:59:18 -07:00
ocfs2	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-04-02 21:09:10 -07:00
omfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-04-02 21:09:10 -07:00
openpromfs
partitions	Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6	2009-03-26 16:04:22 -07:00
proc	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-04-02 21:09:10 -07:00
qnx4	fs/qnx4: return f_fsid for statfs(2)	2009-04-02 19:05:10 -07:00
quota	vfs: skip I_CLEAR state inodes	2009-04-02 19:04:48 -07:00
ramfs	ramfs: add support for "mode=" mount option	2009-04-01 08:59:22 -07:00
reiserfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-04-02 21:09:10 -07:00
romfs	fs/Kconfig: move romfs out	2009-01-22 13:15:59 +03:00
smbfs	constify dentry_operations: misc filesystems	2009-03-27 14:44:00 -04:00
squashfs	fs/squashfs: return f_fsid for statfs(2)	2009-04-02 19:05:10 -07:00
sysfs	mm: page_mkwrite change prototype to match fault: fix sysfs	2009-04-01 08:59:14 -07:00
sysv	fs/sysv: return f_fsid for statfs(2)	2009-04-02 19:05:10 -07:00
ubifs	mm: page_mkwrite change prototype to match fault	2009-04-01 08:59:14 -07:00
udf	udf: Use lowercase names of quota functions	2009-03-26 02:18:36 +01:00
ufs	fs/ufs: return f_fsid for statfs(2)	2009-04-02 19:05:10 -07:00
xfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-04-02 21:09:10 -07:00
aio.c	aio: lookup_ioctx can return the wrong value when looking up a bogus context	2009-03-19 15:57:18 -07:00
anon_inodes.c	constify dentry_operations: rest	2009-03-27 14:44:03 -04:00
attr.c	vfs: Use lowercase names of quota functions	2009-03-26 02:18:35 +01:00
bad_inode.c
binfmt_aout.c
binfmt_elf.c	Trim includes in binfmt_elf	2009-03-31 23:00:27 -04:00
binfmt_elf_fdpic.c	bin_elf_fdpic: check the return value of clear_user	2009-04-02 19:05:01 -07:00
binfmt_em86.c
binfmt_flat.c
binfmt_misc.c
binfmt_script.c
binfmt_som.c	Don't crap into descriptor table in binfmt_som	2009-03-31 23:00:28 -04:00
bio-integrity.c	block: add private bio_set for bio integrity allocations	2009-03-24 12:35:17 +01:00
bio.c	block: add private bio_set for bio integrity allocations	2009-03-24 12:35:17 +01:00
block_dev.c	Cleanup after commit 585d3bc06f	2009-04-01 07:07:16 -04:00
buffer.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-04-02 21:09:10 -07:00
char_dev.c
compat.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-04-02 21:09:10 -07:00
compat_binfmt_elf.c
compat_ioctl.c	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	2009-03-01 21:35:16 -08:00
dcache.c	Trim includes of fdtable.h	2009-03-31 23:00:28 -04:00
dcookies.c
direct-io.c
drop_caches.c	vfs: skip I_CLEAR state inodes	2009-04-02 19:04:48 -07:00
eventfd.c	epoll keyed wakeups: make eventfd use keyed wakeups	2009-04-01 08:59:20 -07:00
eventpoll.c	epoll keyed wakeups: teach epoll about hints coming with the wakeup key	2009-04-01 08:59:20 -07:00
exec.c	Get rid of indirect include of fs_struct.h	2009-03-31 23:00:27 -04:00
fcntl.c	Fix a lockdep warning in fasync_helper()	2009-03-30 08:00:24 -06:00
fifo.c
file.c
file_table.c	Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6	2009-03-26 16:14:02 -07:00
filesystems.c	[CVE-2009-0029] System call wrappers part 27	2009-01-14 14:15:29 +01:00
fs-writeback.c	writeback: guard against jiffies wraparound on inode->dirtied_when checks (try #3)	2009-04-02 19:04:48 -07:00
fs_struct.c	Get rid of indirect include of fs_struct.h	2009-03-31 23:00:27 -04:00
generic_acl.c	New helper - current_umask()	2009-03-31 23:00:26 -04:00
inode.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-03-27 16:23:12 -07:00
internal.h	New locking/refcounting for fs_struct	2009-03-31 23:00:26 -04:00
ioctl.c	Rationalize fasync return values	2009-03-16 08:34:35 -06:00
ioprio.c	[CVE-2009-0029] System call wrappers part 28	2009-01-14 14:15:30 +01:00
Kconfig	CacheFiles: A cache that backs onto a mounted filesystem	2009-04-03 16:42:41 +01:00
Kconfig.binfmt
libfs.c	vfs: simple_set_mnt() should return void	2009-03-27 14:44:03 -04:00
locks.c	[CVE-2009-0029] System call wrappers part 16	2009-01-14 14:15:25 +01:00
Makefile	CacheFiles: A cache that backs onto a mounted filesystem	2009-04-03 16:42:41 +01:00
mbcache.c
mpage.c	Remove two unneeded exports and make two symbols static in fs/mpage.c	2009-04-01 07:38:54 -04:00
namei.c	Get rid of indirect include of fs_struct.h	2009-03-31 23:00:27 -04:00
namespace.c	Get rid of indirect include of fs_struct.h	2009-03-31 23:00:27 -04:00
nfsctl.c	[CVE-2009-0029] System call wrappers part 27	2009-01-14 14:15:29 +01:00
no-block.c
open.c	Get rid of indirect include of fs_struct.h	2009-03-31 23:00:27 -04:00
pipe.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-03-27 16:23:12 -07:00
pnode.c
pnode.h
posix_acl.c
read_write.c	preadv/pwritev: Add preadv and pwritev system calls.	2009-04-02 19:05:08 -07:00
read_write.h
readdir.c	[CVE-2009-0029] System call wrappers part 32	2009-01-14 14:15:31 +01:00
select.c	[CVE-2009-0029] System call wrappers part 32	2009-01-14 14:15:31 +01:00
seq_file.c	cpumask: fix seq_bitmap_*() functions.	2009-03-30 22:05:11 +10:30
signalfd.c	[CVE-2009-0029] System call wrappers part 31	2009-01-14 14:15:31 +01:00
splice.c	FS-Cache: Recruit a page flags for cache management	2009-04-03 16:42:36 +01:00
stack.c
stat.c	[CVE-2009-0029] System call wrappers part 30	2009-01-14 14:15:30 +01:00
super.c	CacheFiles: Export things for CacheFiles	2009-04-03 16:42:40 +01:00
sync.c	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-quota-2.6	2009-03-27 14:48:34 -07:00
timerfd.c	timerfd: add flags check	2009-02-18 15:37:53 -08:00
utimes.c	[CVE-2009-0029] System call wrappers part 30	2009-01-14 14:15:30 +01:00
xattr.c	[CVE-2009-0029] System call wrappers part 13	2009-01-14 14:15:23 +01:00
xattr_acl.c