Chuck Lever 8154ef2776 NFSD: Clean up legacy NFS WRITE argument XDR decoders ... Move common code in NFSD's legacy NFS WRITE decoders into a helper. The immediate benefit is reduction of code duplication and some nice micro-optimizations (see below). In the long term, this helper can perform a per-transport call-out to fill the rq_vec (say, using RDMA Reads). The legacy WRITE decoders and procs are changed to work like NFSv4, which constructs the rq_vec just before it is about to call vfs_writev. Why? Calling a transport call-out from the proc instead of the XDR decoder means that the incoming FH can be resolved to a particular filesystem and file. This would allow pages from the backing file to be presented to the transport to be filled, rather than presenting anonymous pages and copying or flipping them into the file's page cache later. I also prefer using the pages in rq_arg.pages, instead of pulling the data pages directly out of the rqstp::rq_pages array. This is currently the way the NFSv3 write decoder works, but the other two do not seem to take this approach. Fixing this removes the only reference to rq_pages found in NFSD, eliminating an NFSD assumption about how transports use the pages in rq_pages. Lastly, avoid setting up the first element of rq_vec as a zero- length buffer. This happens with an RDMA transport when a normal Read chunk is present because the data payload is in rq_arg's page list (none of it is in the head buffer). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>		2018-04-03 15:08:16 -04:00
..
9p	fs/*/Kconfig: drop links to 404-compliant http://acl.bestbits.at	2018-01-01 12:45:37 -07:00
adfs
affs	iversion: Rename make inode_cmp_iversion{+raw} to inode_eq_iversion{+raw}	2018-02-01 08:15:25 -05:00
afs	afs: Support the AFS dynamic root	2018-02-06 14:43:37 +00:00
autofs4	Merge branch 'userns-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2018-01-30 14:43:12 -08:00
befs	befs: Define usercopy region in befs_inode_cache slab cache	2018-01-15 12:07:54 -08:00
bfs
btrfs	for-4.16-rc1-tag	2018-02-16 09:26:18 -08:00
cachefiles	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
ceph	Things have been very quiet on the rbd side, as work continues on the	2018-02-08 11:38:59 -08:00
cifs	Add missing structs and defines from recent SMB3.1.1 documentation	2018-02-07 09:36:46 -06:00
coda	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
configfs
cramfs	cramfs: better MTD dependency expression	2018-02-08 11:37:31 -08:00
crypto	fscrypt: fix build with pre-4.6 gcc versions	2018-02-01 10:51:18 -05:00
debugfs	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
devpts	devpts: fix error handling in devpts_mntget()	2018-01-31 08:48:37 -08:00
dlm	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
ecryptfs	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
efivarfs
efs
exofs	iversion.h related cleanup for v4.16	2018-02-07 14:25:22 -08:00
exportfs
ext2	iversion.h related cleanup for v4.16	2018-02-07 14:25:22 -08:00
ext4	iversion.h related cleanup for v4.16	2018-02-07 14:25:22 -08:00
f2fs	Refactor support for encrypted symlinks to move common code to fscrypt.	2018-02-04 10:43:12 -08:00
fat	iversion: Rename make inode_cmp_iversion{+raw} to inode_eq_iversion{+raw}	2018-02-01 08:15:25 -05:00
freevxfs	vxfs: Define usercopy region in vxfs_inode slab cache	2018-01-15 12:07:57 -08:00
fscache
fuse	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
gfs2	gfs2: Fixes to "Implement iomap for block_map"	2018-02-13 13:38:10 -07:00
hfs
hfsplus	hfsplus: honor setgid flag on directories	2018-02-06 18:32:45 -08:00
hostfs
hpfs
hugetlbfs	hugetlb: implement memfd sealing	2018-01-31 17:18:39 -08:00
isofs
jbd2	jbd2: fix sphinx kernel-doc build warnings	2018-01-10 00:27:29 -05:00
jffs2	Documentation updates for 4.16. New stuff includes refcount_t	2018-01-31 19:25:25 -08:00
jfs	Currently, hardened usercopy performs dynamic bounds checking on slab	2018-02-03 16:25:42 -08:00
kernfs	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
lockd	lockd: make nlm_ntf_refcnt and nlm_ntf_wq static	2018-03-19 16:38:13 -04:00
minix
nfs	iversion: Rename make inode_cmp_iversion{+raw} to inode_eq_iversion{+raw}	2018-02-01 08:15:25 -05:00
nfs_common
nfsd	NFSD: Clean up legacy NFS WRITE argument XDR decoders	2018-04-03 15:08:16 -04:00
nilfs2	nilfs2: use time64_t internally	2018-02-06 18:32:45 -08:00
nls
notify	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
ntfs	ntfs: remove i_version handling	2018-01-01 10:09:33 -05:00
ocfs2	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
omfs
openpromfs
orangefs	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
overlayfs	ovl: check ERR_PTR() return value from ovl_encode_fh()	2018-02-05 09:50:29 +01:00
proc	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-02-14 17:31:51 -08:00
pstore
qnx4
qnx6
quota
ramfs
reiserfs	fs/*/Kconfig: drop links to 404-compliant http://acl.bestbits.at	2018-01-01 12:45:37 -07:00
romfs
squashfs
sysfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk	2018-02-01 13:36:15 -08:00
sysv
tracefs
ubifs	Refactor support for encrypted symlinks to move common code to fscrypt.	2018-02-04 10:43:12 -08:00
udf	udf: Sanitize nanoseconds for time stamps	2017-12-19 08:11:01 +01:00
ufs	iversion.h related cleanup for v4.16	2018-02-07 14:25:22 -08:00
xfs	Changes since last update:	2018-02-05 13:35:56 -08:00
aio.c
anon_inodes.c
attr.c
bad_inode.c
binfmt_aout.c
binfmt_elf.c	elf: fix NT_FILE integer overflow	2018-02-06 18:32:45 -08:00
binfmt_elf_fdpic.c
binfmt_em86.c
binfmt_flat.c
binfmt_misc.c
binfmt_script.c
block_dev.c
buffer.c	Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-01-31 09:25:20 -08:00
char_dev.c
compat.c
compat_binfmt_elf.c
compat_ioctl.c	fs: compat_ioctl: add new DVB demux ioctls	2017-12-28 11:17:29 -05:00
coredump.c
dax.c	Only miscellaneous cleanups and bug fixes for ext4 this cycle.	2018-02-03 13:49:22 -08:00
dcache.c	Merge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs	2018-02-05 13:05:20 -08:00
dcookies.c
direct-io.c	iomap: report collisions between directio and buffered writes to userspace	2018-01-08 10:41:39 -08:00
drop_caches.c
eventfd.c	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
eventpoll.c	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
exec.c	exec: Weaken dumpability for secureexec	2018-01-03 10:13:36 -08:00
fcntl.c	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
fhandle.c	vfs: Copy struct mount.mnt_id to userspace using put_user()	2018-01-15 12:07:51 -08:00
file.c	Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-01-31 09:25:20 -08:00
file_table.c
filesystems.c
fs-writeback.c	writeback: update comment in inode_io_list_move_locked	2018-01-06 09:18:00 -07:00
fs_pin.c
fs_struct.c
inode.c	vfs: remove might_sleep() from clear_inode()	2018-02-06 18:32:47 -08:00
internal.h
ioctl.c
iomap.c	iomap: warn on zero-length mappings	2018-01-29 07:27:24 -08:00
Kconfig	libnvdimm for 4.16	2018-02-06 10:41:33 -08:00
Kconfig.binfmt
libfs.c
locks.c	This request is late, apologies.	2018-02-08 15:18:32 -08:00
Makefile
mbcache.c	mbcache: make sure c_entry_count is not decremented past zero	2018-01-09 23:57:52 -05:00
mount.h
mpage.c
namei.c	Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-01-31 09:25:20 -08:00
namespace.c
no-block.c
nsfs.c	nsfs: generalize ns_get_path() for path resolution with a task	2017-12-31 16:12:23 +01:00
open.c
pipe.c	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
pnode.c
pnode.h
posix_acl.c	posix_acl: convert posix_acl.a_refcount from atomic_t to refcount_t	2018-01-02 19:27:28 -08:00
proc_namespace.c	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
read_write.c
readdir.c
select.c	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
seq_file.c	seq_file: fix incomplete reset on read from zero offset	2018-01-20 02:31:15 -05:00
signalfd.c	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
splice.c
stack.c
stat.c
statfs.c
super.c	Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-01-31 09:25:20 -08:00
sync.c
timerfd.c	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
userfaultfd.c	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
utimes.c
xattr.c