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authorTrond Myklebust <trond.myklebust@hammerspace.com>2018-06-03 20:05:21 +0300
committerTrond Myklebust <trond.myklebust@hammerspace.com>2018-06-04 22:03:58 +0300
commit3f0b3cf46e0542ac4b4241c579b944b755d11b67 (patch)
treebaa85d9d600d133ff43efb69fa6a568951b3534b /fs/nfs/inode.c
parent4ebe83af202284b5ff8c65cb12902fd5518c5c58 (diff)
downloadlinux-3f0b3cf46e0542ac4b4241c579b944b755d11b67.tar.xz
NFS: Filter cache invalidation when holding a delegation
If the client holds a delegation, then ensure we filter out attempts to invalidate the size, owner, group owner, or mode unless we made the change, in which case, check that NFS_INO_REVAL_FORCED is set by the caller. Always filter out attempts to invalidate the change attribute and size, since we are authoritative for those. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'fs/nfs/inode.c')
-rw-r--r--fs/nfs/inode.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index bc84ecaae886..73473d9bdfa4 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -195,10 +195,16 @@ bool nfs_check_cache_invalid(struct inode *inode, unsigned long flags)
static void nfs_set_cache_invalid(struct inode *inode, unsigned long flags)
{
struct nfs_inode *nfsi = NFS_I(inode);
- bool have_delegation = nfs_have_delegated_attributes(inode);
+ bool have_delegation = NFS_PROTO(inode)->have_delegation(inode, FMODE_READ);
+
+ if (have_delegation) {
+ if (!(flags & NFS_INO_REVAL_FORCED))
+ flags &= ~NFS_INO_INVALID_OTHER;
+ flags &= ~(NFS_INO_INVALID_CHANGE
+ | NFS_INO_INVALID_SIZE
+ | NFS_INO_REVAL_PAGECACHE);
+ }
- if (have_delegation)
- flags &= ~(NFS_INO_INVALID_CHANGE|NFS_INO_REVAL_PAGECACHE);
if (inode->i_mapping->nrpages == 0)
flags &= ~NFS_INO_INVALID_DATA;
nfsi->cache_validity |= flags;