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NFSv4: Ensure change attribute returned by GETATTR callback conforms to spec

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According to RFC3530 we're supposed to cache the change attribute
 at the time the client receives a write delegation.
 If the inode is clean, a CB_GETATTR callback by the server to the
 client is supposed to return the cached change attribute.
 If, OTOH, the inode is dirty, the client should bump the cached
 change attribute by 1.

 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2006-01-03 09:55:37 +01:00
parent 969b7f2522
commit beb2a5ec38
3 changed files with 5 additions and 1 deletions
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4
fs/nfs/callback_proc.c
View File

@ -35,7 +35,9 @@ unsigned nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres
if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0)
goto out_iput;
res->size = i_size_read(inode);
res->change_attr = NFS_CHANGE_ATTR(inode);
res->change_attr = delegation->change_attr;
if (nfsi->npages != 0)
res->change_attr++;
res->ctime = inode->i_ctime;
res->mtime = inode->i_mtime;
res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) &

1
fs/nfs/delegation.c
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@ -131,6 +131,7 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct
sizeof(delegation->stateid.data));
delegation->type = res->delegation_type;
delegation->maxsize = res->maxsize;
delegation->change_attr = nfsi->change_attr;
delegation->cred = get_rpccred(cred);
delegation->inode = inode;

1
fs/nfs/delegation.h
View File

@ -21,6 +21,7 @@ struct nfs_delegation {
#define NFS_DELEGATION_NEED_RECLAIM 1
long flags;
loff_t maxsize;
__u64 change_attr;
};
int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res);