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NFSv4: Fixes for nfs4_inode_return_delegation() 

We mustn't call nfs_wb_all() on anything other than a regular file.
Furthermore, we can exit early when we don't hold a delegation.

Reported-by: David Wysochanski <dwysocha@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2021-10-10 10:58:12 +02:00
parent f0caea8882
commit 6e176d4716
1 changed files with 6 additions and 4 deletions
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10
fs/nfs/delegation.c
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@ -755,11 +755,13 @@ int nfs4_inode_return_delegation(struct inode *inode)
struct nfs_delegation *delegation;
delegation = nfs_start_delegation_return(nfsi);
/* Synchronous recall of any application leases */
break_lease(inode, O_WRONLY | O_RDWR);
nfs_wb_all(inode);
if (delegation != NULL)
if (delegation != NULL) {
/* Synchronous recall of any application leases */
break_lease(inode, O_WRONLY | O_RDWR);
if (S_ISREG(inode->i_mode))
nfs_wb_all(inode);
return nfs_end_delegation_return(inode, delegation, 1);
}
return 0;
}