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| author | Trond Myklebust <trond.myklebust@hammerspace.com> | 2020-01-27 18:44:41 +0100 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2020-03-16 13:34:28 +0100 |
| commit | 57f188e047731e50cb6af94d473c3c70d3bce7f9 (patch) | |
| tree | 81b4d1bfff5b0727f3cad56298d9cdc21dd63c71 /fs/nfs/delegation.c | |
| parent | NFS: Use the 64-bit server readdir cookies when possible (diff) | |
| download | linux-57f188e047731e50cb6af94d473c3c70d3bce7f9.tar.xz linux-57f188e047731e50cb6af94d473c3c70d3bce7f9.zip | |
NFSv4: nfs_update_inplace_delegation() should update delegation cred
If the cred assigned to the delegation that we're updating differs
from the one we're updating too, then we need to update that field
too.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'fs/nfs/delegation.c')
| -rw-r--r-- | fs/nfs/delegation.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index 1865322de142..509b7235b132 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -378,6 +378,18 @@ nfs_inode_detach_delegation(struct inode *inode) } static void +nfs_update_delegation_cred(struct nfs_delegation *delegation, + const struct cred *cred) +{ + const struct cred *old; + + if (cred_fscmp(delegation->cred, cred) != 0) { + old = xchg(&delegation->cred, get_cred(cred)); + put_cred(old); + } +} + +static void nfs_update_inplace_delegation(struct nfs_delegation *delegation, const struct nfs_delegation *update) { @@ -385,8 +397,14 @@ nfs_update_inplace_delegation(struct nfs_delegation *delegation, delegation->stateid.seqid = update->stateid.seqid; smp_wmb(); delegation->type = update->type; - if (test_and_clear_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) + delegation->pagemod_limit = update->pagemod_limit; + if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) { + delegation->change_attr = update->change_attr; + nfs_update_delegation_cred(delegation, update->cred); + /* smp_mb__before_atomic() is implicit due to xchg() */ + clear_bit(NFS_DELEGATION_REVOKED, &delegation->flags); atomic_long_inc(&nfs_active_delegations); + } } } |