diff options
Diffstat (limited to '0006-Linux-Only-use-automount-for-volume-roots.patch')
| -rw-r--r-- | 0006-Linux-Only-use-automount-for-volume-roots.patch | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/0006-Linux-Only-use-automount-for-volume-roots.patch b/0006-Linux-Only-use-automount-for-volume-roots.patch new file mode 100644 index 000000000000..fbf70eebfb72 --- /dev/null +++ b/0006-Linux-Only-use-automount-for-volume-roots.patch @@ -0,0 +1,47 @@ +From 81d05d6fb3b79e572064f57e1f8185d3b16149dc Mon Sep 17 00:00:00 2001 +From: Marc Dionne <marc.dionne@your-file-system.com> +Date: Wed, 29 Jul 2015 09:03:14 -0300 +Subject: [PATCH 6/6] Linux: Only use automount for volume roots + +As long as we avoid using directory aliases when crossing +a mount point (at the volume root), we should always get +to a given non root directory with the same dentry. +The mechanism added by commit de381aa0 ("Linux: Make dir +dentry aliases act like symlinks") is therefore only really +necessary for a volume root. + +With kernel 4.2 it is not possible to tweak the "total link +count", resulting in ELOOP errors when looking up a path +with 40 or more directories that are being looked up for +the first time. With this change, only mountpoints will +count against the limit. + +Reviewed-on: http://gerrit.openafs.org/11945 +Reviewed-by: Benjamin Kaduk <kaduk@mit.edu> +Reviewed-by: Daria Brashear <shadow@your-file-system.com> +Tested-by: BuildBot <buildbot@rampaginggeek.com> +(cherry picked from commit 05f64de7d723a8d5430d9b5928c2025838a6fa52) + +Change-Id: I16e855c8322174604288b7d440b342951dd3a015 +--- + src/afs/LINUX/osi_vnodeops.c | 4 +++- + 1 file changed, 3 insertions(+), 1 deletion(-) + +diff --git a/src/afs/LINUX/osi_vnodeops.c b/src/afs/LINUX/osi_vnodeops.c +index 3c0cb33..ae0513c 100644 +--- a/src/afs/LINUX/osi_vnodeops.c ++++ b/src/afs/LINUX/osi_vnodeops.c +@@ -1555,7 +1555,9 @@ afs_linux_lookup(struct inode *dip, struct dentry *dp) + d_prune_aliases(ip); + + #ifdef STRUCT_DENTRY_OPERATIONS_HAS_D_AUTOMOUNT +- ip->i_flags |= S_AUTOMOUNT; ++ /* Only needed if this is a volume root */ ++ if (vcp->mvstat == 2) ++ ip->i_flags |= S_AUTOMOUNT; + #endif + } + /* +-- +2.5.1 + |