I intend to reuse nfsd4_encode_readv() for READ_PLUS, so I need an
alternate way to encode these values. I think it makes sense for
nfsd4_encode_read() to handle this in a single place for both splice and
readv paths.
Signed-off-by: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>
---
fs/nfsd/nfs4xdr.c | 60 ++++++++++++++++++++++---------------------------------
1 file changed, 24 insertions(+), 36 deletions(-)
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 5463385..2af54fa 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -3294,21 +3294,19 @@ nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struc
static __be32 nfsd4_encode_splice_read(
struct nfsd4_compoundres *resp,
struct nfsd4_read *read,
- struct file *file, unsigned long maxcount)
+ struct file *file, unsigned long *maxcount)
{
struct xdr_stream *xdr = &resp->xdr;
struct xdr_buf *buf = xdr->buf;
- u32 eof;
int space_left;
__be32 nfserr;
- __be32 *p = xdr->p - 2;
/* Make sure there will be room for padding if needed */
if (xdr->end - xdr->p < 1)
return nfserr_resource;
nfserr = nfsd_splice_read(read->rd_rqstp, file,
- read->rd_offset, &maxcount);
+ read->rd_offset, maxcount);
if (nfserr) {
/*
* nfsd_splice_actor may have already messed with the
@@ -3319,27 +3317,21 @@ static __be32 nfsd4_encode_splice_read(
return nfserr;
}
- eof = (read->rd_offset + maxcount >=
- d_inode(read->rd_fhp->fh_dentry)->i_size);
-
- *(p++) = htonl(eof);
- *(p++) = htonl(maxcount);
-
- buf->page_len = maxcount;
- buf->len += maxcount;
- xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
+ buf->page_len = *maxcount;
+ buf->len += *maxcount;
+ xdr->page_ptr += (buf->page_base + *maxcount + PAGE_SIZE - 1)
/ PAGE_SIZE;
/* Use rest of head for padding and remaining ops: */
buf->tail[0].iov_base = xdr->p;
buf->tail[0].iov_len = 0;
xdr->iov = buf->tail;
- if (maxcount&3) {
- int pad = 4 - (maxcount&3);
+ if (*maxcount&3) {
+ int pad = 4 - (*maxcount&3);
*(xdr->p++) = 0;
- buf->tail[0].iov_base += maxcount&3;
+ buf->tail[0].iov_base += *maxcount&3;
buf->tail[0].iov_len = pad;
buf->len += pad;
}
@@ -3354,21 +3346,19 @@ static __be32 nfsd4_encode_splice_read(
static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
struct nfsd4_read *read,
- struct file *file, unsigned long maxcount)
+ struct file *file, unsigned long *maxcount)
{
struct xdr_stream *xdr = &resp->xdr;
- u32 eof;
int v;
- int starting_len = xdr->buf->len - 8;
+ int starting_len = xdr->buf->len;
long len;
int thislen;
__be32 nfserr;
- __be32 tmp;
__be32 *p;
u32 zzz = 0;
int pad;
- len = maxcount;
+ len = *maxcount;
v = 0;
thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
@@ -3391,22 +3381,13 @@ static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
read->rd_vlen = v;
nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
- read->rd_vlen, &maxcount);
+ read->rd_vlen, maxcount);
if (nfserr)
return nfserr;
- xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
+ xdr_truncate_encode(xdr, starting_len + ((*maxcount+3)&~3));
- eof = (read->rd_offset + maxcount >=
- d_inode(read->rd_fhp->fh_dentry)->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);
-
- pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
- write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
- &zzz, pad);
+ pad = (*maxcount&3) ? 4 - (*maxcount&3) : 0;
+ write_bytes_to_xdr_buf(xdr->buf, starting_len + *maxcount, &zzz, pad);
return 0;
}
@@ -3421,6 +3402,8 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
int starting_len = xdr->buf->len;
struct raparms *ra = NULL;
__be32 *p;
+ __be32 err;
+ u32 eof;
if (nfserr)
goto out;
@@ -3449,9 +3432,14 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
if (file->f_op->splice_read &&
test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
- nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
+ err = nfsd4_encode_splice_read(resp, read, file, &maxcount);
else
- nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
+ err = nfsd4_encode_readv(resp, read, file, &maxcount);
+
+ eof = (read->rd_offset + maxcount >=
+ d_inode(read->rd_fhp->fh_dentry)->i_size);
+ *p++ = cpu_to_be32(eof);
+ *p++ = cpu_to_be32(maxcount);
if (ra)
nfsd_put_raparams(file, ra);
--
2.5.1
--
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