mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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9b9960a0ca
Have a simple flex file server where the mds (NFSv4.1 or NFSv4.2) is also the ds (NFSv3). I.e., the metadata and the data file are the exact same file. This will allow testing of the flex file client. Simply add the "pnfs" export option to your export in /etc/exports and mount from a client that supports flex files. Signed-off-by: Tom Haynes <loghyr@primarydata.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
/*
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* Copyright (c) 2016 Tom Haynes <loghyr@primarydata.com>
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*/
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#include <linux/sunrpc/svc.h>
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#include <linux/nfs4.h>
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#include "nfsd.h"
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#include "flexfilelayoutxdr.h"
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#define NFSDDBG_FACILITY NFSDDBG_PNFS
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struct ff_idmap {
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char buf[11];
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int len;
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};
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__be32
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nfsd4_ff_encode_layoutget(struct xdr_stream *xdr,
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struct nfsd4_layoutget *lgp)
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{
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struct pnfs_ff_layout *fl = lgp->lg_content;
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int len, mirror_len, ds_len, fh_len;
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__be32 *p;
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/*
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* Unlike nfsd4_encode_user, we know these will
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* always be stringified.
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*/
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struct ff_idmap uid;
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struct ff_idmap gid;
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fh_len = 4 + fl->fh.size;
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uid.len = sprintf(uid.buf, "%u", from_kuid(&init_user_ns, fl->uid));
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gid.len = sprintf(gid.buf, "%u", from_kgid(&init_user_ns, fl->gid));
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/* 8 + len for recording the length, name, and padding */
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ds_len = 20 + sizeof(stateid_opaque_t) + 4 + fh_len +
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8 + uid.len + 8 + gid.len;
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mirror_len = 4 + ds_len;
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/* The layout segment */
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len = 20 + mirror_len;
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p = xdr_reserve_space(xdr, sizeof(__be32) + len);
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if (!p)
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return nfserr_toosmall;
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*p++ = cpu_to_be32(len);
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p = xdr_encode_hyper(p, 0); /* stripe unit of 1 */
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*p++ = cpu_to_be32(1); /* single mirror */
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*p++ = cpu_to_be32(1); /* single data server */
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p = xdr_encode_opaque_fixed(p, &fl->deviceid,
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sizeof(struct nfsd4_deviceid));
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*p++ = cpu_to_be32(1); /* efficiency */
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*p++ = cpu_to_be32(fl->stateid.si_generation);
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p = xdr_encode_opaque_fixed(p, &fl->stateid.si_opaque,
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sizeof(stateid_opaque_t));
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*p++ = cpu_to_be32(1); /* single file handle */
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p = xdr_encode_opaque(p, fl->fh.data, fl->fh.size);
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p = xdr_encode_opaque(p, uid.buf, uid.len);
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p = xdr_encode_opaque(p, gid.buf, gid.len);
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*p++ = cpu_to_be32(fl->flags);
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*p++ = cpu_to_be32(0); /* No stats collect hint */
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return 0;
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}
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__be32
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nfsd4_ff_encode_getdeviceinfo(struct xdr_stream *xdr,
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struct nfsd4_getdeviceinfo *gdp)
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{
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struct pnfs_ff_device_addr *da = gdp->gd_device;
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int len;
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int ver_len;
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int addr_len;
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__be32 *p;
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/* len + padding for two strings */
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addr_len = 16 + da->netaddr.netid_len + da->netaddr.addr_len;
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ver_len = 20;
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len = 4 + ver_len + 4 + addr_len;
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p = xdr_reserve_space(xdr, len + sizeof(__be32));
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if (!p)
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return nfserr_resource;
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/*
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* Fill in the overall length and number of volumes at the beginning
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* of the layout.
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*/
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*p++ = cpu_to_be32(len);
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*p++ = cpu_to_be32(1); /* 1 netaddr */
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p = xdr_encode_opaque(p, da->netaddr.netid, da->netaddr.netid_len);
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p = xdr_encode_opaque(p, da->netaddr.addr, da->netaddr.addr_len);
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*p++ = cpu_to_be32(1); /* 1 versions */
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*p++ = cpu_to_be32(da->version);
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*p++ = cpu_to_be32(da->minor_version);
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*p++ = cpu_to_be32(da->rsize);
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*p++ = cpu_to_be32(da->wsize);
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*p++ = cpu_to_be32(da->tightly_coupled);
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return 0;
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}
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