From: Andy Adamson <andros@xxxxxxxxxx>
The block driver uses GETDEVICELIST
Signed-off-by: Andy Adamson <andros@xxxxxxxxxx>
[pass struct nfs_server * to getdevicelist]
[get machince creds for getdevicelist]
[fix getdevicelist decode sizing]
Signed-off-by: Benny Halevy <bhalevy@xxxxxxxxxxx>
Signed-off-by: Peng Tao <bergwolf@xxxxxxxxx>
---
fs/nfs/nfs4proc.c | 48 ++++++++++++++++++
fs/nfs/nfs4xdr.c | 128 +++++++++++++++++++++++++++++++++++++++++++++++
fs/nfs/pnfs.h | 12 ++++
include/linux/nfs4.h | 1 +
include/linux/nfs_xdr.h | 11 ++++
5 files changed, 200 insertions(+), 0 deletions(-)
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 3ca4497..ec580a8 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -5759,6 +5759,54 @@ int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
return status;
}
+/*
+ * Retrieve the list of Data Server devices from the MDS.
+ */
+static int _nfs4_getdevicelist(struct nfs_server *server,
+ const struct nfs_fh *fh,
+ struct pnfs_devicelist *devlist)
+{
+ struct nfs4_getdevicelist_args args = {
+ .fh = fh,
+ .layoutclass = server->pnfs_curr_ld->id,
+ };
+ struct nfs4_getdevicelist_res res = {
+ .devlist = devlist,
+ };
+ struct rpc_message msg = {
+ .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
+ .rpc_argp = &args,
+ .rpc_resp = &res,
+ };
+ int status;
+
+ dprintk("--> %s\n", __func__);
+ status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
+ &res.seq_res, 0);
+ dprintk("<-- %s status=%d\n", __func__, status);
+ return status;
+}
+
+int nfs4_proc_getdevicelist(struct nfs_server *server,
+ const struct nfs_fh *fh,
+ struct pnfs_devicelist *devlist)
+{
+ struct nfs4_exception exception = { };
+ int err;
+
+ do {
+ err = nfs4_handle_exception(server,
+ _nfs4_getdevicelist(server, fh, devlist),
+ &exception);
+ } while (exception.retry);
+
+ dprintk("%s: err=%d, num_devs=%u\n", __func__,
+ err, devlist->num_devs);
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
+
static int
_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
{
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index c4b7d6c..60e9d44 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -314,6 +314,17 @@ static int nfs4_stat_to_errno(int);
XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
#define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
#define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
+#define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \
+ encode_verifier_maxsz)
+#define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \
+ 2 /* nfs_cookie4 gdlr_cookie */ + \
+ decode_verifier_maxsz \
+ /* verifier4 gdlr_verifier */ + \
+ 1 /* gdlr_deviceid_list count */ + \
+ XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \
+ NFS4_DEVICEID4_SIZE) \
+ /* gdlr_deviceid_list */ + \
+ 1 /* bool gdlr_eof */)
#define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
#define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
@@ -740,6 +751,14 @@ static int nfs4_stat_to_errno(int);
#define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_reclaim_complete_maxsz)
+#define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_getdevicelist_maxsz)
+#define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_getdevicelist_maxsz)
#define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz +\
encode_getdeviceinfo_maxsz)
@@ -1827,6 +1846,26 @@ static void encode_sequence(struct xdr_stream *xdr,
#ifdef CONFIG_NFS_V4_1
static void
+encode_getdevicelist(struct xdr_stream *xdr,
+ const struct nfs4_getdevicelist_args *args,
+ struct compound_hdr *hdr)
+{
+ __be32 *p;
+ nfs4_verifier dummy = {
+ .data = "dummmmmy",
+ };
+
+ p = reserve_space(xdr, 20);
+ *p++ = cpu_to_be32(OP_GETDEVICELIST);
+ *p++ = cpu_to_be32(args->layoutclass);
+ *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM);
+ xdr_encode_hyper(p, 0ULL); /* cookie */
+ encode_nfs4_verifier(xdr, &dummy);
+ hdr->nops++;
+ hdr->replen += decode_getdevicelist_maxsz;
+}
+
+static void
encode_getdeviceinfo(struct xdr_stream *xdr,
const struct nfs4_getdeviceinfo_args *args,
struct compound_hdr *hdr)
@@ -2707,6 +2746,24 @@ static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
}
/*
+ * Encode GETDEVICELIST request
+ */
+static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs4_getdevicelist_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->fh, &hdr);
+ encode_getdevicelist(xdr, args, &hdr);
+ encode_nops(&hdr);
+}
+
+/*
* Encode GETDEVICEINFO request
*/
static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
@@ -5141,6 +5198,50 @@ out_overflow:
}
#if defined(CONFIG_NFS_V4_1)
+/*
+ * TODO: Need to handle case when EOF != true;
+ */
+static int decode_getdevicelist(struct xdr_stream *xdr,
+ struct pnfs_devicelist *res)
+{
+ __be32 *p;
+ int status, i;
+ struct nfs_writeverf verftemp;
+
+ status = decode_op_hdr(xdr, OP_GETDEVICELIST);
+ if (status)
+ return status;
+
+ p = xdr_inline_decode(xdr, 8 + 8 + 4);
+ if (unlikely(!p))
+ goto out_overflow;
+
+ /* TODO: Skip cookie for now */
+ p += 2;
+
+ /* Read verifier */
+ p = xdr_decode_opaque_fixed(p, verftemp.verifier, 8);
+
+ res->num_devs = be32_to_cpup(p);
+
+ dprintk("%s: num_dev %d\n", __func__, res->num_devs);
+
+ if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM)
+ return -NFS4ERR_REP_TOO_BIG;
+
+ p = xdr_inline_decode(xdr,
+ res->num_devs * NFS4_DEVICEID4_SIZE + 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ for (i = 0; i < res->num_devs; i++)
+ p = xdr_decode_opaque_fixed(p, res->dev_id[i].data,
+ NFS4_DEVICEID4_SIZE);
+ res->eof = be32_to_cpup(p);
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
static int decode_getdeviceinfo(struct xdr_stream *xdr,
struct pnfs_device *pdev)
@@ -6366,6 +6467,32 @@ static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
}
/*
+ * Decode GETDEVICELIST response
+ */
+static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs4_getdevicelist_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ dprintk("encoding getdevicelist!\n");
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status != 0)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status != 0)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status != 0)
+ goto out;
+ status = decode_getdevicelist(xdr, res->devlist);
+out:
+ return status;
+}
+
+/*
* Decode GETDEVINFO response
*/
static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
@@ -6663,6 +6790,7 @@ struct rpc_procinfo nfs4_procedures[] = {
PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
+ PROC(GETDEVICELIST, enc_getdevicelist, dec_getdevicelist),
#endif /* CONFIG_NFS_V4_1 */
};
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index f2b183b..9dc950c 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -133,14 +133,26 @@ struct pnfs_device {
unsigned int layout_type;
unsigned int mincount;
struct page **pages;
+ void *area;
unsigned int pgbase;
unsigned int pglen;
};
+#define NFS4_PNFS_GETDEVLIST_MAXNUM 16
+
+struct pnfs_devicelist {
+ unsigned int eof;
+ unsigned int num_devs;
+ struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM];
+};
+
extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *);
extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
/* nfs4proc.c */
+extern int nfs4_proc_getdevicelist(struct nfs_server *server,
+ const struct nfs_fh *fh,
+ struct pnfs_devicelist *devlist);
extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
struct pnfs_device *dev);
extern int nfs4_proc_layoutget(struct nfs4_layoutget *lgp);
diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
index 504b289..7915d41 100644
--- a/include/linux/nfs4.h
+++ b/include/linux/nfs4.h
@@ -560,6 +560,7 @@ enum {
NFSPROC4_CLNT_GET_LEASE_TIME,
NFSPROC4_CLNT_RECLAIM_COMPLETE,
NFSPROC4_CLNT_LAYOUTGET,
+ NFSPROC4_CLNT_GETDEVICELIST,
NFSPROC4_CLNT_GETDEVICEINFO,
NFSPROC4_CLNT_LAYOUTCOMMIT,
NFSPROC4_CLNT_LAYOUTRETURN,
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 00848d8..0863228 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -235,6 +235,17 @@ struct nfs4_layoutget {
gfp_t gfp_flags;
};
+struct nfs4_getdevicelist_args {
+ const struct nfs_fh *fh;
+ u32 layoutclass;
+ struct nfs4_sequence_args seq_args;
+};
+
+struct nfs4_getdevicelist_res {
+ struct pnfs_devicelist *devlist;
+ struct nfs4_sequence_res seq_res;
+};
+
struct nfs4_getdeviceinfo_args {
struct pnfs_device *pdev;
struct nfs4_sequence_args seq_args;
--
1.7.4.1
--
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