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| author | Trond Myklebust <trondmy@gmail.com> | 2019-11-01 01:40:32 +0300 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2019-11-01 17:59:26 +0300 |
| commit | be3df3dd4c70ee020587a943a31b98a0fb4b6424 (patch) | |
| tree | fc9a15033a2e3285ca917bd41a01d0503961e89d /fs/nfs/delegation.c | |
| parent | 669996add4c92476e0f8d6b4cd2bb308d1939fd7 (diff) | |
| download | linux-be3df3dd4c70ee020587a943a31b98a0fb4b6424.tar.xz | |
NFSv4: Don't allow a cached open with a revoked delegation
If the delegation is marked as being revoked, we must not use it
for cached opens.
Fixes: 869f9dfa4d6d ("NFSv4: Fix races between nfs_remove_bad_delegation() and delegation return")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfs/delegation.c')
| -rw-r--r-- | fs/nfs/delegation.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index 071b90a45933..ccdfb5f98f35 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -53,6 +53,16 @@ nfs4_is_valid_delegation(const struct nfs_delegation *delegation, return false; } +struct nfs_delegation *nfs4_get_valid_delegation(const struct inode *inode) +{ + struct nfs_delegation *delegation; + + delegation = rcu_dereference(NFS_I(inode)->delegation); + if (nfs4_is_valid_delegation(delegation, 0)) + return delegation; + return NULL; +} + static int nfs4_do_check_delegation(struct inode *inode, fmode_t flags, bool mark) { |