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author | Chuck Lever <chuck.lever@oracle.com> | 2020-11-14 13:45:35 -0500 |
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committer | Chuck Lever <chuck.lever@oracle.com> | 2021-03-22 10:18:59 -0400 |
commit | f5dcccd647da513a89f3b6ca392b0c1eb050b9fc (patch) | |
tree | 7d0b103e181c3380e09383681fb444b82e14b2ea /fs/nfsd/nfsproc.c | |
parent | 94c8f8c682a6497af7ea71351b18f637c6337d42 (diff) | |
download | linux-f5dcccd647da513a89f3b6ca392b0c1eb050b9fc.tar.gz linux-f5dcccd647da513a89f3b6ca392b0c1eb050b9fc.tar.bz2 linux-f5dcccd647da513a89f3b6ca392b0c1eb050b9fc.zip |
NFSD: Update the NFSv2 READDIR entry encoder to use struct xdr_stream
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'fs/nfsd/nfsproc.c')
-rw-r--r-- | fs/nfsd/nfsproc.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c index 1acff9f4aaf1..86d438fbd576 100644 --- a/fs/nfsd/nfsproc.c +++ b/fs/nfsd/nfsproc.c @@ -559,14 +559,27 @@ static void nfsd_init_dirlist_pages(struct svc_rqst *rqstp, struct nfsd_readdirres *resp, int count) { + struct xdr_buf *buf = &resp->dirlist; + struct xdr_stream *xdr = &resp->xdr; + count = min_t(u32, count, PAGE_SIZE); - /* Convert byte count to number of words (i.e. >> 2), - * and reserve room for the NULL ptr & eof flag (-2 words) */ - resp->buflen = (count >> 2) - 2; + memset(buf, 0, sizeof(*buf)); - resp->buffer = page_address(*rqstp->rq_next_page); + /* Reserve room for the NULL ptr & eof flag (-2 words) */ + buf->buflen = count - sizeof(__be32) * 2; + buf->pages = rqstp->rq_next_page; rqstp->rq_next_page++; + + /* This is xdr_init_encode(), but it assumes that + * the head kvec has already been consumed. */ + xdr_set_scratch_buffer(xdr, NULL, 0); + xdr->buf = buf; + xdr->page_ptr = buf->pages; + xdr->iov = NULL; + xdr->p = page_address(*buf->pages); + xdr->end = xdr->p + (PAGE_SIZE >> 2); + xdr->rqst = NULL; } /* @@ -585,12 +598,11 @@ nfsd_proc_readdir(struct svc_rqst *rqstp) nfsd_init_dirlist_pages(rqstp, resp, argp->count); - resp->offset = NULL; resp->common.err = nfs_ok; - /* Read directory and encode entries on the fly */ + resp->cookie_offset = 0; offset = argp->cookie; resp->status = nfsd_readdir(rqstp, &argp->fh, &offset, - &resp->common, nfssvc_encode_entry); + &resp->common, nfs2svc_encode_entry); nfssvc_encode_nfscookie(resp, offset); fh_put(&argp->fh); |