| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.8 078/140] NFSv4: Dont report revoked delegations as valid in nfs_have_delegation() | Date | Wed, 26 Oct 2016 14:22:18 +0200 |
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4.8-stable review patch. If anyone has any objections, please let me know.
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From: Trond Myklebust <trond.myklebust@primarydata.com>
commit b3f9e7239074613aa6bdafa4caf7c104fe1e7276 upstream.
If the delegation is revoked, then it can't be used for caching.
Fixes: 869f9dfa4d6d ("NFSv4: Fix races between nfs_remove_bad_delegation()...") Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Tested-by: Oleg Drokin <green@linuxhacker.ru> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- fs/nfs/delegation.c | 1 + 1 file changed, 1 insertion(+)
--- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -51,6 +51,7 @@ nfs4_do_check_delegation(struct inode *i rcu_read_lock(); delegation = rcu_dereference(NFS_I(inode)->delegation); if (delegation != NULL && (delegation->type & flags) == flags && + !test_bit(NFS_DELEGATION_REVOKED, &delegation->flags) && !test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) { if (mark) nfs_mark_delegation_referenced(delegation);
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