[extracted from: pnfsd: Initial pNFS server implementation.]
Signed-off-by: Benny Halevy <bhalevy@xxxxxxxxxxx>
[pnfsd: update pNFS server ops to draft 13]
Signed-off-by: Marc Eshel <eshel@xxxxxxxxxxxxxxx>
[pnfsd: Check for dense layout in layout encode.]
Signed-off-by: Dean Hildebrand <dhildeb@xxxxxxxxxx>
[pnfsd: Fix server GETDEVICELIST to comply with NFSv4.1 Draft 13]
Signed-off-by: Ricardo Labiaga <ricardo.labiaga@xxxxxxxxxx>
[pnfsd: Fix file layout layoutget export op for d13]
[pnfsd: Simplify layout get export interface.]
Signed-off-by: Dean Hildebrand <dhildeb@xxxxxxxxxx>
[pnfsd: improve nfs4_pnfs_get_layout dprintks]
Signed-off-by: Benny Halevy <bhalevy@xxxxxxxxxxx>
[pnfsd: initialize layoutget return_on_close]
Signed-off-by: Andy Adamson<andros@xxxxxxxxxx>
[pnfsd: Use 128 bit deviceid on server]
[pnfsd: update server layout xdr for draft 19.]
Signed-off-by: Dean Hildebrand <dhildeb@xxxxxxxxxx>
[pnfsd: filelayout: use nfsd4_compoundres pointer in pnfs_xdr_info]
Signed-off-by: Andy Adamson <andros@xxxxxxxxxx>
[pnfsd: filelayout: get rid of xdr encoding macros for file layout xdr]
[pnfsd: get rid of layout encoding function vector]
[pnfsd: filelayout: strictly define filelayout_encode_layout]
[pnfsd: filelayout: convert to using exp_xdr]
[include nfsd4_pnfs.h from nfs4layoutxdr.h for deviceid_t]
[pnfsd: rename deviceid_t struct pnfs_deviceid]
[pnfsd: fix cosmetic checkpatch warnings]
Signed-off-by: Benny Halevy <bhalevy@xxxxxxxxxxx>
---
fs/exportfs/nfs4filelayoutxdr.c | 86 ++++++++++++++++++++++++++++++++++++
include/linux/nfsd/nfs4layoutxdr.h | 18 ++++++++
2 files changed, 104 insertions(+), 0 deletions(-)
diff --git a/fs/exportfs/nfs4filelayoutxdr.c b/fs/exportfs/nfs4filelayoutxdr.c
index b9c24d2..d7ceb72 100644
--- a/fs/exportfs/nfs4filelayoutxdr.c
+++ b/fs/exportfs/nfs4filelayoutxdr.c
@@ -30,6 +30,9 @@
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/exp_xdr.h>
+#include <linux/module.h>
+#include <linux/nfs4.h>
+#include <linux/nfsd/nfsfh.h>
#include <linux/nfsd/nfs4layoutxdr.h>
/* We do our-own dprintk so filesystems are not dependent on sunrpc */
@@ -130,3 +133,86 @@ out:
return error;
}
EXPORT_SYMBOL(filelayout_encode_devinfo);
+
+/* Encodes the loc_body structure from draft 13
+ * on the response stream.
+ * Use linux error codes (not nfs) since these values are being
+ * returned to the file system.
+ */
+int
+filelayout_encode_layout(struct exp_xdr_stream *xdr,
+ const struct pnfs_filelayout_layout *flp)
+{
+ u32 len = 0, nfl_util, fhlen, i;
+ u32 *layoutlen_p;
+ int error;
+ __be32 *p;
+
+ dprintk("%s: device_id %llx:%llx fsi %u, numfh %u\n",
+ __func__,
+ flp->device_id.pnfs_fsid,
+ flp->device_id.pnfs_devid,
+ flp->lg_first_stripe_index,
+ flp->lg_fh_length);
+
+ /* Ensure file system added at least one file handle */
+ if (flp->lg_fh_length <= 0) {
+ dprintk("%s: File Layout has no file handles!!\n", __func__);
+ error = -NFS4ERR_LAYOUTUNAVAILABLE;
+ goto out;
+ }
+
+ /* Ensure room for len, devid, util, first_stripe_index,
+ * pattern_offset, number of filehandles */
+ p = layoutlen_p = exp_xdr_reserve_qwords(xdr, 1+2+2+1+1+2+1);
+ if (!p) {
+ error = -ETOOSMALL;
+ goto out;
+ }
+
+ /* save spot for opaque file layout length, fill-in later*/
+ p++;
+
+ /* encode device id */
+ p = exp_xdr_encode_u64(p, flp->device_id.fsid);
+ p = exp_xdr_encode_u64(p, flp->device_id.devid);
+
+ /* set and encode flags */
+ nfl_util = flp->lg_stripe_unit;
+ if (flp->lg_commit_through_mds)
+ nfl_util |= NFL4_UFLG_COMMIT_THRU_MDS;
+ if (flp->lg_stripe_type == STRIPE_DENSE)
+ nfl_util |= NFL4_UFLG_DENSE;
+ p = exp_xdr_encode_u32(p, nfl_util);
+
+ /* encode first stripe index */
+ p = exp_xdr_encode_u32(p, flp->lg_first_stripe_index);
+
+ /* encode striping pattern start */
+ p = exp_xdr_encode_u64(p, flp->lg_pattern_offset);
+
+ /* encode number of file handles */
+ p = exp_xdr_encode_u32(p, flp->lg_fh_length);
+
+ /* encode file handles */
+ for (i = 0; i < flp->lg_fh_length; i++) {
+ fhlen = flp->lg_fh_list[i].fh_size;
+ p = exp_xdr_reserve_space(xdr, 4 + fhlen);
+ if (!p) {
+ error = -ETOOSMALL;
+ goto out;
+ }
+ p = exp_xdr_encode_opaque(p, &flp->lg_fh_list[i].fh_base, fhlen);
+ }
+
+ /* Set number of bytes encoded = total_bytes_encoded - length var */
+ len = (char *)p - (char *)layoutlen_p;
+ exp_xdr_encode_u32(layoutlen_p, len - 4);
+
+ error = 0;
+out:
+ dprintk("%s: End err %d xdrlen %d\n",
+ __func__, error, len);
+ return error;
+}
+EXPORT_SYMBOL(filelayout_encode_layout);
diff --git a/include/linux/nfsd/nfs4layoutxdr.h b/include/linux/nfsd/nfs4layoutxdr.h
index 5da0c74..26fddd5 100644
--- a/include/linux/nfsd/nfs4layoutxdr.h
+++ b/include/linux/nfsd/nfs4layoutxdr.h
@@ -35,6 +35,7 @@
#define NFSD_NFS4LAYOUTXDR_H
#include <linux/sunrpc/xdr.h>
+#include <linux/nfsd/nfsd4_pnfs.h>
/* the nfsd4_pnfs_devlist dev_addr for the file layout type */
struct pnfs_filelayout_devaddr {
@@ -55,4 +56,21 @@ struct pnfs_filelayout_device {
struct pnfs_filelayout_multipath *fl_device_list;
};
+struct pnfs_filelayout_layout {
+ u32 lg_layout_type; /* response */
+ u32 lg_stripe_type; /* response */
+ u32 lg_commit_through_mds; /* response */
+ u64 lg_stripe_unit; /* response */
+ u64 lg_pattern_offset; /* response */
+ u32 lg_first_stripe_index; /* response */
+ struct nfsd4_pnfs_deviceid device_id; /* response */
+ u32 lg_fh_length; /* response */
+ struct knfsd_fh *lg_fh_list; /* response */
+};
+
+enum stripetype4 {
+ STRIPE_SPARSE = 1,
+ STRIPE_DENSE = 2
+};
+
#endif /* NFSD_NFS4LAYOUTXDR_H */
--
1.6.5.1
--
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