From d41bbb6dbaf64a8ef55e40e0550b83daac1eeb7a Mon Sep 17 00:00:00 2001 From: Niels de Vos Date: Mon, 10 Aug 2015 18:01:32 +0200 Subject: fuse: add "resolve-gids" mount option to overcome 32-groups limit Add a --resolve-gids commandline option to the glusterfs binary. This option gets set when executing "mount -t glusterfs -o resolve-gids ...". This option is most useful in combination with the "acl" mount option. POSIX ACL permission checking is done on the FUSE-client side to improve performance (in addition to the checking on the bricks). The fuse-bridge reads /proc/$PID/status by default, and this file contains maximum 32 groups. Any local (client-side) permission checking that requires more than the first 32 groups will fail. By enabling the "resolve-gids" option, the fuse-bridge will call getgrouplist() to retrieve all the groups from the user accessing the mountpoint. This is comparable to how "nfs.server-aux-gids" works. Note that when a user belongs to more than ~93 groups, the volume option server.manage-gids needs to be enabled too. Without this option, the RPC-layer will need to reduce the number of groups to make them fit in the RPC-header. Cherry picked from commit 64a5bf3749c67fcc00773a2716d0c7b61b0b4417: > Change-Id: I7ede90d0e41bcf55755cced5747fa0fb1699edb2 > BUG: 1246275 > Signed-off-by: Niels de Vos > Reviewed-on: http://review.gluster.org/11732 > Tested-by: NetBSD Build System > Reviewed-by: Ravishankar N > Tested-by: Gluster Build System > Reviewed-by: jiffin tony Thottan > Reviewed-by: Kaleb KEITHLEY Change-Id: I7ede90d0e41bcf55755cced5747fa0fb1699edb2 BUG: 1246397 Signed-off-by: Niels de Vos Reviewed-on: http://review.gluster.org/11875 Tested-by: Gluster Build System Tested-by: NetBSD Build System Reviewed-by: Pranith Kumar Karampuri --- doc/glusterfsd.8 | 3 +++ 1 file changed, 3 insertions(+) (limited to 'doc') diff --git a/doc/glusterfsd.8 b/doc/glusterfsd.8 index 176d042367c..88b667cb463 100644 --- a/doc/glusterfsd.8 +++ b/doc/glusterfsd.8 @@ -101,6 +101,9 @@ Set entry timeout to SECONDS in fuse kernel module [default: 1] .TP \fB\-\-direct\-io\-mode=BOOL\fR Enable/Disable direct-io mode in fuse module [default: enable] +.TP +\fB\-\-resolve-gids\fR +Resolve all auxilary groups in fuse translator (max 32 otherwise) .SS "Miscellaneous Options" .PP -- cgit