From: "J. Bruce Fields" <bfields@xxxxxxxxxx> --- Documentation/filesystems/nfs/nfs41-server.txt | 2 - fs/nfsd/nfs4xdr.c | 100 +++++++++++++------------ 2 files changed, 51 insertions(+), 51 deletions(-) diff --git a/Documentation/filesystems/nfs/nfs41-server.txt b/Documentation/filesystems/nfs/nfs41-server.txt index b930ad0..c49cd7e 100644 --- a/Documentation/filesystems/nfs/nfs41-server.txt +++ b/Documentation/filesystems/nfs/nfs41-server.txt @@ -176,7 +176,5 @@ Nonstandard compound limitations: ca_maxrequestsize request and a ca_maxresponsesize reply, so we may fail to live up to the promise we made in CREATE_SESSION fore channel negotiation. -* No more than one read-like operation allowed per compound; encoding - replies that cross page boundaries (except for read data) not handled. See also http://wiki.linux-nfs.org/wiki/index.php/Server_4.0_and_4.1_issues. diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index e052351..d92dd1b 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -3074,11 +3074,11 @@ static __be32 nfsd4_encode_splice_read( struct file *file, unsigned long maxcount) { struct xdr_stream *xdr = &resp->xdr; + struct xdr_buf *buf = xdr->buf; u32 eof; - int starting_len = xdr->buf->len - 8; + int space_left; __be32 nfserr; - __be32 tmp; - __be32 *p; + __be32 *p = xdr->p - 2; /* * Don't inline pages unless we know there's room for eof, @@ -3090,34 +3090,38 @@ static __be32 nfsd4_encode_splice_read( nfserr = nfsd_splice_read(read->rd_rqstp, file, read->rd_offset, &maxcount); if (nfserr) { - xdr->buf->page_len = 0; + buf->page_len = 0; return nfserr; } eof = (read->rd_offset + maxcount >= read->rd_fhp->fh_dentry->d_inode->i_size); - tmp = htonl(eof); - write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4); - tmp = htonl(maxcount); - write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); + *(p++) = htonl(eof); + *(p++) = htonl(maxcount); - resp->xdr.buf->page_len = maxcount; - xdr->buf->len += maxcount; - xdr->page_ptr += (maxcount + PAGE_SIZE - 1) / PAGE_SIZE; - xdr->buf->buflen = maxcount + PAGE_SIZE - 2 * RPC_MAX_AUTH_SIZE; - xdr->iov = xdr->buf->tail; + buf->page_len = maxcount; + buf->len += maxcount; /* Use rest of head for padding and remaining ops: */ - resp->xdr.buf->tail[0].iov_base = xdr->p; - resp->xdr.buf->tail[0].iov_len = 0; + buf->tail[0].iov_base = xdr->p; + buf->tail[0].iov_len = 0; + xdr->iov = xdr->buf->tail; if (maxcount&3) { - p = xdr_reserve_space(xdr, 4); - WRITE32(0); - resp->xdr.buf->tail[0].iov_base += maxcount&3; - resp->xdr.buf->tail[0].iov_len = 4 - (maxcount&3); - xdr->buf->len -= (maxcount&3); + int pad = 4 - (maxcount&3); + + *(xdr->p++) = 0; + + buf->tail[0].iov_base += maxcount&3; + buf->tail[0].iov_len = pad; + buf->len += pad; } + + space_left = min_t(int, (void *)xdr->end - (void *)xdr->p, + buf->buflen - buf->len); + buf->buflen = buf->len + space_left; + xdr->end = (__be32 *)((void *)xdr->end + space_left); + return 0; } @@ -3128,27 +3132,34 @@ static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, struct xdr_stream *xdr = &resp->xdr; u32 eof; int v; - struct page *page; int starting_len = xdr->buf->len - 8; long len; + int thislen; __be32 nfserr; __be32 tmp; __be32 *p; + u32 zzz = 0; + int pad; len = maxcount; v = 0; - while (len) { - int thislen; - page = *(resp->rqstp->rq_next_page); - if (!page) { /* ran out of pages */ - maxcount -= len; - break; - } + thislen = (void *)xdr->end - (void *)xdr->p; + if (len < thislen) + thislen = len; + p = xdr_reserve_space(xdr, (thislen+3)&~3); + WARN_ON_ONCE(!p); + resp->rqstp->rq_vec[v].iov_base = p; + resp->rqstp->rq_vec[v].iov_len = thislen; + v++; + len -= thislen; + + while (len) { thislen = min_t(long, len, PAGE_SIZE); - resp->rqstp->rq_vec[v].iov_base = page_address(page); + p = xdr_reserve_space(xdr, (thislen+3)&~3); + WARN_ON_ONCE(!p); + resp->rqstp->rq_vec[v].iov_base = p; resp->rqstp->rq_vec[v].iov_len = thislen; - resp->rqstp->rq_next_page++; v++; len -= thislen; } @@ -3158,6 +3169,7 @@ static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, read->rd_vlen, &maxcount); if (nfserr) return nfserr; + xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3)); eof = (read->rd_offset + maxcount >= read->rd_fhp->fh_dentry->d_inode->i_size); @@ -3167,22 +3179,9 @@ static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, tmp = htonl(maxcount); write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); - resp->xdr.buf->page_len = maxcount; - xdr->buf->len += maxcount; - xdr->page_ptr += v; - xdr->buf->buflen = maxcount + PAGE_SIZE - 2 * RPC_MAX_AUTH_SIZE; - xdr->iov = xdr->buf->tail; - - /* Use rest of head for padding and remaining ops: */ - resp->xdr.buf->tail[0].iov_base = xdr->p; - resp->xdr.buf->tail[0].iov_len = 0; - if (maxcount&3) { - p = xdr_reserve_space(xdr, 4); - WRITE32(0); - resp->xdr.buf->tail[0].iov_base += maxcount&3; - resp->xdr.buf->tail[0].iov_len = 4 - (maxcount&3); - xdr->buf->len -= (maxcount&3); - } + pad = (maxcount&3) ? 4 - (maxcount&3) : 0; + write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount, + &zzz, pad); return 0; } @@ -3204,16 +3203,19 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */ if (!p) { - WARN_ON_ONCE(1); + WARN_ON_ONCE(resp->rqstp->rq_splice_ok); return nfserr_resource; } - if (resp->xdr.buf->page_len) + if (resp->rqstp->rq_splice_ok && resp->xdr.buf->page_len) { + WARN_ON_ONCE(1); return nfserr_resource; - + } xdr_commit_encode(xdr); maxcount = svc_max_payload(resp->rqstp); + if (maxcount > xdr->buf->buflen - xdr->buf->len) + maxcount = xdr->buf->buflen - xdr->buf->len; if (maxcount > read->rd_length) maxcount = read->rd_length; -- 1.8.5.3 -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
