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dcb19c3886
freebsd-skq/sys/fs
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Rick Macklem dcb19c3886 A problem w.r.t. interoperation between the FreeBSD NFSv4.1 server with 
delegations enabled and the Linux NFSv4.1 client was reported in
reviews.freebsd.org/D7891.
I believe that the FreeBSD server behaviour conforms to the RFC and that
the Linux client has a bug. Therefore, I do not think the proposed patch
is appropriate. When nfsrv_writedelegifpos is non-zero, the FreeBSD
server will issue a write delegation for a read open if possible.
The Linux client then erroneously assumes that the credentials used for
the read open can write the file.
This patch reverses the default value for nfsrv_writedelegifpos to 0 so
that the default behaviour is Linux compatible and adds a sysctl that can
be used to set nfsrv_writedelegifpos.

This change should only affect users that are mounting a FreeBSD server
with delegations enabled (they are not enabled by default) with a Linux
NFSv4.1 client mount.

Reported by:	fatih.acar@gandi.net
Tested by:	fatih.acar@gandi.net
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D7891
2016-10-20 23:53:16 +00:00
..
autofs Implement autofs_print(), for improved debugging experience. 2016-08-11 14:27:23 +00:00
cd9660 Remove drop/reacquire of Giant around geom calls for cd9660 and udf. 2016-05-22 18:16:25 +00:00
cuse Prevent cuse4bsd.ko and cuse.ko from loading at the same time by 2016-09-23 07:41:23 +00:00
deadfs Style changes for deadfs: 2014-10-15 13:22:33 +00:00
devfs Hide the boottime and bootimebin globals, provide the getboottime(9) 2016-07-27 11:08:59 +00:00
ext2fs ext2fs: Add defines for some missing ext4 feature flags. 2016-08-06 17:24:35 +00:00
fdescfs Hide the boottime and bootimebin globals, provide the getboottime(9) 2016-07-27 11:08:59 +00:00
fifofs Rewrite sigdeferstop(9) and sigallowstop(9) into more flexible 2016-06-26 20:07:24 +00:00
fuse If a local (AF_LOCAL, AF_UNIX) socket creation (bind) is attempted 2016-05-18 22:23:20 +00:00
msdosfs Mount msdosfs with longnames support by default. 2016-09-23 19:05:07 +00:00
nandfs Fix panic() message reporting ufs instead of nandfs 2016-10-13 19:33:07 +00:00
nfs Update the nfsstats structure to include the changes needed by 2016-08-12 22:44:59 +00:00
nfsclient Update the nfsstats structure to include the changes needed by 2016-08-12 22:44:59 +00:00
nfsserver A problem w.r.t. interoperation between the FreeBSD NFSv4.1 server with 2016-10-20 23:53:16 +00:00
nullfs Change the getnewvnode(9) tag for nullfs from "null" to "nullfs". 2016-09-15 13:57:37 +00:00
procfs Hide the boottime and bootimebin globals, provide the getboottime(9) 2016-07-27 11:08:59 +00:00
pseudofs Remove Giant asserts. Update comment. 2016-08-03 08:57:15 +00:00
smbfs Replace all remaining calls to vprint(9) with vn_printf(9), and remove 2016-08-10 16:12:31 +00:00
tmpfs Convert another tmpfs assert into runtime check. 2016-08-10 13:50:21 +00:00
udf Remove drop/reacquire of Giant around geom calls for cd9660 and udf. 2016-05-22 18:16:25 +00:00
unionfs Replace all remaining calls to vprint(9) with vn_printf(9), and remove 2016-08-10 16:12:31 +00:00