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pnfs: GETDEVICELIST
The block driver uses GETDEVICELIST Signed-off-by: Andy Adamson <andros@netapp.com> [pass struct nfs_server * to getdevicelist] [get machince creds for getdevicelist] [fix getdevicelist decode sizing] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Benny Halevy <bhalevy@tonian.com> Signed-off-by: Jim Rees <rees@umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
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3557c6c3be
commit
7f11d8d38d
@ -5834,6 +5834,54 @@ int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
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return status;
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}
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/*
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* Retrieve the list of Data Server devices from the MDS.
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*/
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static int _nfs4_getdevicelist(struct nfs_server *server,
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const struct nfs_fh *fh,
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struct pnfs_devicelist *devlist)
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{
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struct nfs4_getdevicelist_args args = {
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.fh = fh,
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.layoutclass = server->pnfs_curr_ld->id,
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};
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struct nfs4_getdevicelist_res res = {
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.devlist = devlist,
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};
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struct rpc_message msg = {
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.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
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.rpc_argp = &args,
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.rpc_resp = &res,
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};
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int status;
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dprintk("--> %s\n", __func__);
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status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
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&res.seq_res, 0);
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dprintk("<-- %s status=%d\n", __func__, status);
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return status;
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}
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int nfs4_proc_getdevicelist(struct nfs_server *server,
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const struct nfs_fh *fh,
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struct pnfs_devicelist *devlist)
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{
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struct nfs4_exception exception = { };
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int err;
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do {
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err = nfs4_handle_exception(server,
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_nfs4_getdevicelist(server, fh, devlist),
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&exception);
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} while (exception.retry);
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dprintk("%s: err=%d, num_devs=%u\n", __func__,
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err, devlist->num_devs);
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return err;
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}
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EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
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static int
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_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
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{
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131
fs/nfs/nfs4xdr.c
131
fs/nfs/nfs4xdr.c
@ -314,6 +314,17 @@ static int nfs4_stat_to_errno(int);
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XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
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#define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
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#define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
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#define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
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encode_verifier_maxsz)
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#define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
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2 /* nfs_cookie4 gdlr_cookie */ + \
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decode_verifier_maxsz \
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/* verifier4 gdlr_verifier */ + \
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1 /* gdlr_deviceid_list count */ + \
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XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
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NFS4_DEVICEID4_SIZE) \
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/* gdlr_deviceid_list */ + \
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1 /* bool gdlr_eof */)
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#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
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XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
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#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
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@ -748,6 +759,14 @@ static int nfs4_stat_to_errno(int);
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#define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
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decode_sequence_maxsz + \
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decode_reclaim_complete_maxsz)
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#define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
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encode_sequence_maxsz + \
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encode_putfh_maxsz + \
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encode_getdevicelist_maxsz)
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#define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
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decode_sequence_maxsz + \
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decode_putfh_maxsz + \
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decode_getdevicelist_maxsz)
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#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
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encode_sequence_maxsz +\
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encode_getdeviceinfo_maxsz)
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@ -1854,6 +1873,26 @@ static void encode_sequence(struct xdr_stream *xdr,
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}
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#ifdef CONFIG_NFS_V4_1
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static void
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encode_getdevicelist(struct xdr_stream *xdr,
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const struct nfs4_getdevicelist_args *args,
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struct compound_hdr *hdr)
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{
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__be32 *p;
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nfs4_verifier dummy = {
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.data = "dummmmmy",
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};
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p = reserve_space(xdr, 20);
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*p++ = cpu_to_be32(OP_GETDEVICELIST);
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*p++ = cpu_to_be32(args->layoutclass);
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*p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
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xdr_encode_hyper(p, 0ULL); /* cookie */
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encode_nfs4_verifier(xdr, &dummy);
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hdr->nops++;
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hdr->replen += decode_getdevicelist_maxsz;
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}
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static void
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encode_getdeviceinfo(struct xdr_stream *xdr,
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const struct nfs4_getdeviceinfo_args *args,
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@ -2774,6 +2813,24 @@ static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
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encode_nops(&hdr);
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}
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/*
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* Encode GETDEVICELIST request
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*/
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static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
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struct xdr_stream *xdr,
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struct nfs4_getdevicelist_args *args)
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{
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struct compound_hdr hdr = {
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.minorversion = nfs4_xdr_minorversion(&args->seq_args),
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};
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encode_compound_hdr(xdr, req, &hdr);
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encode_sequence(xdr, &args->seq_args, &hdr);
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encode_putfh(xdr, args->fh, &hdr);
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encode_getdevicelist(xdr, args, &hdr);
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encode_nops(&hdr);
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}
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/*
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* Encode GETDEVICEINFO request
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*/
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@ -5268,6 +5325,53 @@ out_overflow:
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}
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#if defined(CONFIG_NFS_V4_1)
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/*
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* TODO: Need to handle case when EOF != true;
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*/
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static int decode_getdevicelist(struct xdr_stream *xdr,
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struct pnfs_devicelist *res)
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{
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__be32 *p;
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int status, i;
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struct nfs_writeverf verftemp;
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status = decode_op_hdr(xdr, OP_GETDEVICELIST);
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if (status)
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return status;
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p = xdr_inline_decode(xdr, 8 + 8 + 4);
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if (unlikely(!p))
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goto out_overflow;
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/* TODO: Skip cookie for now */
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p += 2;
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/* Read verifier */
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p = xdr_decode_opaque_fixed(p, verftemp.verifier, 8);
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res->num_devs = be32_to_cpup(p);
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dprintk("%s: num_dev %d\n", __func__, res->num_devs);
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if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) {
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printk(KERN_ERR "%s too many result dev_num %u\n",
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__func__, res->num_devs);
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return -EIO;
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}
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p = xdr_inline_decode(xdr,
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res->num_devs * NFS4_DEVICEID4_SIZE + 4);
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if (unlikely(!p))
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goto out_overflow;
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for (i = 0; i < res->num_devs; i++)
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p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
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NFS4_DEVICEID4_SIZE);
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res->eof = be32_to_cpup(p);
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return 0;
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out_overflow:
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print_overflow_msg(__func__, xdr);
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return -EIO;
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}
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static int decode_getdeviceinfo(struct xdr_stream *xdr,
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struct pnfs_device *pdev)
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@ -6541,6 +6645,32 @@ static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
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return status;
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}
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/*
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* Decode GETDEVICELIST response
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*/
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static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
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struct xdr_stream *xdr,
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struct nfs4_getdevicelist_res *res)
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{
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struct compound_hdr hdr;
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int status;
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dprintk("encoding getdevicelist!\n");
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status = decode_compound_hdr(xdr, &hdr);
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if (status != 0)
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goto out;
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status = decode_sequence(xdr, &res->seq_res, rqstp);
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if (status != 0)
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goto out;
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status = decode_putfh(xdr);
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if (status != 0)
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goto out;
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status = decode_getdevicelist(xdr, res->devlist);
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out:
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return status;
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}
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/*
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* Decode GETDEVINFO response
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*/
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@ -6908,6 +7038,7 @@ struct rpc_procinfo nfs4_procedures[] = {
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PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
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PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
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PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid),
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PROC(GETDEVICELIST, enc_getdevicelist, dec_getdevicelist),
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#endif /* CONFIG_NFS_V4_1 */
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};
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@ -135,14 +135,26 @@ struct pnfs_device {
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unsigned int layout_type;
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unsigned int mincount;
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struct page **pages;
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void *area;
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unsigned int pgbase;
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unsigned int pglen;
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};
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#define NFS4_PNFS_GETDEVLIST_MAXNUM 16
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struct pnfs_devicelist {
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unsigned int eof;
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unsigned int num_devs;
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struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM];
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};
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extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *);
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extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
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/* nfs4proc.c */
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extern int nfs4_proc_getdevicelist(struct nfs_server *server,
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const struct nfs_fh *fh,
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struct pnfs_devicelist *devlist);
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extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
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struct pnfs_device *dev);
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extern int nfs4_proc_layoutget(struct nfs4_layoutget *lgp);
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@ -566,6 +566,7 @@ enum {
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NFSPROC4_CLNT_SECINFO_NO_NAME,
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NFSPROC4_CLNT_TEST_STATEID,
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NFSPROC4_CLNT_FREE_STATEID,
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NFSPROC4_CLNT_GETDEVICELIST,
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};
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/* nfs41 types */
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@ -235,6 +235,17 @@ struct nfs4_layoutget {
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gfp_t gfp_flags;
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};
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struct nfs4_getdevicelist_args {
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const struct nfs_fh *fh;
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u32 layoutclass;
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struct nfs4_sequence_args seq_args;
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};
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struct nfs4_getdevicelist_res {
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struct pnfs_devicelist *devlist;
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struct nfs4_sequence_res seq_res;
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};
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struct nfs4_getdeviceinfo_args {
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struct pnfs_device *pdev;
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struct nfs4_sequence_args seq_args;
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