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[PATCH] NFSv4: add support for rdattr_error in NFSv4 readdir requests.

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Request RDATTR_ERROR as an attribute in readdir to distinguish between a
 directory being within an absent filesystem or one (or more) of its entries.

 Signed-off-by: Manoj Naik <manoj@almaden.ibm.com>
 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Manoj Naik 2005-06-22 17:16:39 +00:00 committed by Trond Myklebust
parent 8d0a8a9d0e
commit 97d312d037
1 changed files with 17 additions and 7 deletions
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24
fs/nfs/nfs4xdr.c
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@ -1014,6 +1014,10 @@ static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
{
struct rpc_auth *auth = req->rq_task->tk_auth;
uint32_t attrs[2] = {
FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
FATTR4_WORD1_MOUNTED_ON_FILEID,
};
int replen;
uint32_t *p;
@ -1024,13 +1028,13 @@ static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg
WRITE32(readdir->count >> 1); /* We're not doing readdirplus */
WRITE32(readdir->count);
WRITE32(2);
if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) {
WRITE32(0);
WRITE32(FATTR4_WORD1_MOUNTED_ON_FILEID);
} else {
WRITE32(FATTR4_WORD0_FILEID);
WRITE32(0);
}
/* Switch to mounted_on_fileid if the server supports it */
if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
attrs[0] &= ~FATTR4_WORD0_FILEID;
else
attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
WRITE32(attrs[0] & readdir->bitmask[0]);
WRITE32(attrs[1] & readdir->bitmask[1]);
/* set up reply kvec
* toplevel_status + taglen + rescount + OP_PUTFH + status
@ -4060,6 +4064,12 @@ uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus)
}
len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
if (len > 0) {
if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
/* Ignore the return value of rdattr_error for now */
p++;
len--;
}
if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
xdr_decode_hyper(p, &entry->ino);
else if (bitmap[0] == FATTR4_WORD0_FILEID)