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-rw-r--r--fs/nfsd/nfs4state.c142
-rw-r--r--fs/nfsd/nfs4xdr.c147
2 files changed, 284 insertions, 5 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index cfc01f415d15..4f963e902972 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -832,12 +832,152 @@ out_err:
return;
}
+/*
+ * Set the exchange_id flags returned by the server.
+ */
+static void
+nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid)
+{
+ /* pNFS is not supported */
+ new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS;
+
+ /* Referrals are supported, Migration is not. */
+ new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;
+
+ /* set the wire flags to return to client. */
+ clid->flags = new->cl_exchange_flags;
+}
+
__be32
nfsd4_exchange_id(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
struct nfsd4_exchange_id *exid)
{
- return -1; /* stub */
+ struct nfs4_client *unconf, *conf, *new;
+ int status;
+ unsigned int strhashval;
+ char dname[HEXDIR_LEN];
+ nfs4_verifier verf = exid->verifier;
+ u32 ip_addr = svc_addr_in(rqstp)->sin_addr.s_addr;
+
+ dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
+ " ip_addr=%u flags %x, spa_how %d\n",
+ __func__, rqstp, exid, exid->clname.len, exid->clname.data,
+ ip_addr, exid->flags, exid->spa_how);
+
+ if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A))
+ return nfserr_inval;
+
+ /* Currently only support SP4_NONE */
+ switch (exid->spa_how) {
+ case SP4_NONE:
+ break;
+ case SP4_SSV:
+ return nfserr_encr_alg_unsupp;
+ default:
+ BUG(); /* checked by xdr code */
+ case SP4_MACH_CRED:
+ return nfserr_serverfault; /* no excuse :-/ */
+ }
+
+ status = nfs4_make_rec_clidname(dname, &exid->clname);
+
+ if (status)
+ goto error;
+
+ strhashval = clientstr_hashval(dname);
+
+ nfs4_lock_state();
+ status = nfs_ok;
+
+ conf = find_confirmed_client_by_str(dname, strhashval);
+ if (conf) {
+ if (!same_verf(&verf, &conf->cl_verifier)) {
+ /* 18.35.4 case 8 */
+ if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) {
+ status = nfserr_not_same;
+ goto out;
+ }
+ /* Client reboot: destroy old state */
+ expire_client(conf);
+ goto out_new;
+ }
+ if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
+ /* 18.35.4 case 9 */
+ if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) {
+ status = nfserr_perm;
+ goto out;
+ }
+ expire_client(conf);
+ goto out_new;
+ }
+ if (ip_addr != conf->cl_addr &&
+ !(exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A)) {
+ /* Client collision. 18.35.4 case 3 */
+ status = nfserr_clid_inuse;
+ goto out;
+ }
+ /*
+ * Set bit when the owner id and verifier map to an already
+ * confirmed client id (18.35.3).
+ */
+ exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
+
+ /*
+ * Falling into 18.35.4 case 2, possible router replay.
+ * Leave confirmed record intact and return same result.
+ */
+ copy_verf(conf, &verf);
+ new = conf;
+ goto out_copy;
+ } else {
+ /* 18.35.4 case 7 */
+ if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) {
+ status = nfserr_noent;
+ goto out;
+ }
+ }
+
+ unconf = find_unconfirmed_client_by_str(dname, strhashval);
+ if (unconf) {
+ /*
+ * Possible retry or client restart. Per 18.35.4 case 4,
+ * a new unconfirmed record should be generated regardless
+ * of whether any properties have changed.
+ */
+ expire_client(unconf);
+ }
+
+out_new:
+ /* Normal case */
+ new = create_client(exid->clname, dname);
+ if (new == NULL) {
+ status = nfserr_resource;
+ goto out;
+ }
+
+ copy_verf(new, &verf);
+ copy_cred(&new->cl_cred, &rqstp->rq_cred);
+ new->cl_addr = ip_addr;
+ gen_clid(new);
+ gen_confirm(new);
+ add_to_unconfirmed(new, strhashval);
+out_copy:
+ exid->clientid.cl_boot = new->cl_clientid.cl_boot;
+ exid->clientid.cl_id = new->cl_clientid.cl_id;
+
+ new->cl_seqid = exid->seqid = 1;
+ nfsd4_set_ex_flags(new, exid);
+
+ dprintk("nfsd4_exchange_id seqid %d flags %x\n",
+ new->cl_seqid, new->cl_exchange_flags);
+ status = nfs_ok;
+
+out:
+ nfs4_unlock_state();
+error:
+ dprintk("nfsd4_exchange_id returns %d\n", ntohl(status));
+ return status;
}
__be32
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 6973d61bedea..bebf6d249069 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -45,6 +45,7 @@
#include <linux/fs.h>
#include <linux/namei.h>
#include <linux/vfs.h>
+#include <linux/utsname.h>
#include <linux/sunrpc/xdr.h>
#include <linux/sunrpc/svc.h>
#include <linux/sunrpc/clnt.h>
@@ -998,9 +999,100 @@ nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_rel
static __be32
nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
- struct nfsd4_exchange_id *clid)
+ struct nfsd4_exchange_id *exid)
{
- return nfserr_opnotsupp; /* stub */
+ int dummy;
+ DECODE_HEAD;
+
+ READ_BUF(NFS4_VERIFIER_SIZE);
+ COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
+
+ READ_BUF(4);
+ READ32(exid->clname.len);
+
+ READ_BUF(exid->clname.len);
+ SAVEMEM(exid->clname.data, exid->clname.len);
+
+ READ_BUF(4);
+ READ32(exid->flags);
+
+ /* Ignore state_protect4_a */
+ READ_BUF(4);
+ READ32(exid->spa_how);
+ switch (exid->spa_how) {
+ case SP4_NONE:
+ break;
+ case SP4_MACH_CRED:
+ /* spo_must_enforce */
+ READ_BUF(4);
+ READ32(dummy);
+ READ_BUF(dummy * 4);
+ p += dummy;
+
+ /* spo_must_allow */
+ READ_BUF(4);
+ READ32(dummy);
+ READ_BUF(dummy * 4);
+ p += dummy;
+ break;
+ case SP4_SSV:
+ /* ssp_ops */
+ READ_BUF(4);
+ READ32(dummy);
+ READ_BUF(dummy * 4);
+ p += dummy;
+
+ READ_BUF(4);
+ READ32(dummy);
+ READ_BUF(dummy * 4);
+ p += dummy;
+
+ /* ssp_hash_algs<> */
+ READ_BUF(4);
+ READ32(dummy);
+ READ_BUF(dummy);
+ p += XDR_QUADLEN(dummy);
+
+ /* ssp_encr_algs<> */
+ READ_BUF(4);
+ READ32(dummy);
+ READ_BUF(dummy);
+ p += XDR_QUADLEN(dummy);
+
+ /* ssp_window and ssp_num_gss_handles */
+ READ_BUF(8);
+ READ32(dummy);
+ READ32(dummy);
+ break;
+ default:
+ goto xdr_error;
+ }
+
+ /* Ignore Implementation ID */
+ READ_BUF(4); /* nfs_impl_id4 array length */
+ READ32(dummy);
+
+ if (dummy > 1)
+ goto xdr_error;
+
+ if (dummy == 1) {
+ /* nii_domain */
+ READ_BUF(4);
+ READ32(dummy);
+ READ_BUF(dummy);
+ p += XDR_QUADLEN(dummy);
+
+ /* nii_name */
+ READ_BUF(4);
+ READ32(dummy);
+ READ_BUF(dummy);
+ p += XDR_QUADLEN(dummy);
+
+ /* nii_date */
+ READ_BUF(12);
+ p += 3;
+ }
+ DECODE_TAIL;
}
static __be32
@@ -2665,8 +2757,55 @@ static __be32
nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
struct nfsd4_exchange_id *exid)
{
- /* stub */
- return nfserr;
+ ENCODE_HEAD;
+ char *major_id;
+ char *server_scope;
+ int major_id_sz;
+ int server_scope_sz;
+ uint64_t minor_id = 0;
+
+ if (nfserr)
+ return nfserr;
+
+ major_id = utsname()->nodename;
+ major_id_sz = strlen(major_id);
+ server_scope = utsname()->nodename;
+ server_scope_sz = strlen(server_scope);
+
+ RESERVE_SPACE(
+ 8 /* eir_clientid */ +
+ 4 /* eir_sequenceid */ +
+ 4 /* eir_flags */ +
+ 4 /* spr_how (SP4_NONE) */ +
+ 8 /* so_minor_id */ +
+ 4 /* so_major_id.len */ +
+ (XDR_QUADLEN(major_id_sz) * 4) +
+ 4 /* eir_server_scope.len */ +
+ (XDR_QUADLEN(server_scope_sz) * 4) +
+ 4 /* eir_server_impl_id.count (0) */);
+
+ WRITEMEM(&exid->clientid, 8);
+ WRITE32(exid->seqid);
+ WRITE32(exid->flags);
+
+ /* state_protect4_r. Currently only support SP4_NONE */
+ BUG_ON(exid->spa_how != SP4_NONE);
+ WRITE32(exid->spa_how);
+
+ /* The server_owner struct */
+ WRITE64(minor_id); /* Minor id */
+ /* major id */
+ WRITE32(major_id_sz);
+ WRITEMEM(major_id, major_id_sz);
+
+ /* Server scope */
+ WRITE32(server_scope_sz);
+ WRITEMEM(server_scope, server_scope_sz);
+
+ /* Implementation id */
+ WRITE32(0); /* zero length nfs_impl_id4 array */
+ ADJUST_ARGS();
+ return 0;
}
static __be32
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 08:36:54 +0000