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nfsd4: use xdr_stream throughout compound encoding 

Note this makes ADJUST_ARGS useless; we'll remove it in the following
patch.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields 2014-02-26 17:00:38 -05:00
parent ddd1ea5636
commit d3f627c815
2 changed files with 16 additions and 9 deletions
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2
fs/nfsd/nfs4proc.c
View File

@ -1284,7 +1284,7 @@ nfsd4_proc_compound(struct svc_rqst *rqstp,
svcxdr_init_encode(rqstp, resp);
resp->tagp = resp->xdr.p;
/* reserve space for: taglen, tag, and opcnt */
resp->xdr.p += 2 + XDR_QUADLEN(args->taglen);
xdr_reserve_space(&resp->xdr, 8 + args->taglen);
resp->taglen = args->taglen;
resp->tag = args->tag;
resp->opcnt = 0;

23
fs/nfsd/nfs4xdr.c
View File

@ -1747,10 +1747,10 @@ static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
}
#define RESERVE_SPACE(nbytes) do { \
p = resp->xdr.p; \
BUG_ON(p + XDR_QUADLEN(nbytes) > resp->xdr.end); \
p = xdr_reserve_space(&resp->xdr, nbytes); \
BUG_ON(!p); \
} while (0)
#define ADJUST_ARGS() resp->xdr.p = p
#define ADJUST_ARGS() WARN_ON_ONCE(p != resp->xdr.p) \
/* Encode as an array of strings the string given with components
* separated @sep, escaped with esc_enter and esc_exit.
@ -3056,8 +3056,11 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
&maxcount);
if (nfserr)
if (nfserr) {
xdr->p -= 2;
xdr->iov->iov_len -= 8;
return nfserr;
}
eof = (read->rd_offset + maxcount >=
read->rd_fhp->fh_dentry->d_inode->i_size);
@ -3110,9 +3113,12 @@ nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd
*/
nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
if (nfserr == nfserr_isdir)
return nfserr_inval;
if (nfserr)
nfserr = nfserr_inval;
if (nfserr) {
xdr->p--;
xdr->iov->iov_len -= 4;
return nfserr;
}
WRITE32(maxcount);
ADJUST_ARGS();
@ -3213,8 +3219,9 @@ nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4
return 0;
err_no_verf:
p = savep;
ADJUST_ARGS();
xdr->p = savep;
xdr->iov->iov_len = ((char *)resp->xdr.p)
- (char *)resp->xdr.buf->head[0].iov_base;
return nfserr;
}