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NFSv3: Client-side nfsacl caching fix 

Fix two errors in the client-side acl cache: First, when nfs3_proc_getacl
requests only the default acl of a file and the access acl is not cached
already, a NULL access acl entry is cached instead of ERR_PTR(-EAGAIN)
("not cached").

Second, update the cached acls in nfs3_proc_setacls: nfs_refresh_inode does
not always invalidate the cached acls, and when it does not, the cached acls
get out of sync.

Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Andreas Gruenbacher 2006-05-25 01:41:03 -04:00 committed by Trond Myklebust
parent 1842bfb447
commit 4814f56d19
1 changed files with 8 additions and 3 deletions
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11
fs/nfs/nfs3acl.c
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@ -172,8 +172,10 @@ static void nfs3_cache_acls(struct inode *inode, struct posix_acl *acl,
inode->i_ino, acl, dfacl);
spin_lock(&inode->i_lock);
__nfs3_forget_cached_acls(NFS_I(inode));
nfsi->acl_access = posix_acl_dup(acl);
nfsi->acl_default = posix_acl_dup(dfacl);
if (!IS_ERR(acl))
nfsi->acl_access = posix_acl_dup(acl);
if (!IS_ERR(dfacl))
nfsi->acl_default = posix_acl_dup(dfacl);
spin_unlock(&inode->i_lock);
}
@ -254,7 +256,9 @@ struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type)
res.acl_access = NULL;
}
}
nfs3_cache_acls(inode, res.acl_access, res.acl_default);
nfs3_cache_acls(inode,
(res.mask & NFS_ACL) ? res.acl_access : ERR_PTR(-EINVAL),
(res.mask & NFS_DFACL) ? res.acl_default : ERR_PTR(-EINVAL));
switch(type) {
case ACL_TYPE_ACCESS:
@ -329,6 +333,7 @@ static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
switch (status) {
case 0:
status = nfs_refresh_inode(inode, &fattr);
nfs3_cache_acls(inode, acl, dfacl);
break;
case -EPFNOSUPPORT:
case -EPROTONOSUPPORT: