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NFS refactor nfs_find_client and reference client across callback processing
Fixes a bug where the nfs_client could be freed during callback processing. Refactor nfs_find_client to use minorversion specific means to locate the correct nfs_client structure. In the NFS layer, V4.0 clients are found using the callback_ident field in the CB_COMPOUND header. V4.1 clients are found using the sessionID in the CB_SEQUENCE operation which is also compared against the sessionID associated with the back channel thread after a successful CREATE_SESSION. Each of these methods finds the one an only nfs_client associated with the incoming callback request - so nfs_find_client_next is not needed. In the RPC layer, the pg_authenticate call needs to find the nfs_client. For the v4.0 callback service, the callback identifier has not been decoded so a search by address, version, and minorversion is used. The sessionid for the sessions based callback service has (usually) not been set for the pg_authenticate on a CB_NULL call which can be sent prior to the return of a CREATE_SESSION call, so the sessionid associated with the back channel thread is not used to find the client in pg_authenticate for CB_NULL calls. Pass the referenced nfs_client to each CB_COMPOUND operation being proceesed via the new cb_process_state structure. The reference is held across cb_compound processing. Use the new cb_process_state struct to move the NFS4ERR_RETRY_UNCACHED_REP processing from process_op into nfs4_callback_sequence where it belongs. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Andy Adamson
Trond Myklebust
parent
2c2618c6f2
commit
c36fca52f5
@ -16,9 +16,7 @@
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#include <linux/freezer.h>
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#include <linux/kthread.h>
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#include <linux/sunrpc/svcauth_gss.h>
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#if defined(CONFIG_NFS_V4_1)
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#include <linux/sunrpc/bc_xprt.h>
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#endif
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#include <net/inet_sock.h>
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@ -384,6 +382,23 @@ static int check_gss_callback_principal(struct nfs_client *clp,
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return SVC_OK;
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}
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/* pg_authenticate method helper */
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static struct nfs_client *nfs_cb_find_client(struct svc_rqst *rqstp)
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{
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struct nfs4_sessionid *sessionid = bc_xprt_sid(rqstp);
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int is_cb_compound = rqstp->rq_proc == CB_COMPOUND ? 1 : 0;
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dprintk("--> %s rq_proc %d\n", __func__, rqstp->rq_proc);
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if (svc_is_backchannel(rqstp))
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/* Sessionid (usually) set after CB_NULL ping */
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return nfs4_find_client_sessionid(svc_addr(rqstp), sessionid,
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is_cb_compound);
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else
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/* No callback identifier in pg_authenticate */
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return nfs4_find_client_no_ident(svc_addr(rqstp));
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}
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/* pg_authenticate method for nfsv4 callback threads. */
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static int nfs_callback_authenticate(struct svc_rqst *rqstp)
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{
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struct nfs_client *clp;
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@ -391,7 +406,7 @@ static int nfs_callback_authenticate(struct svc_rqst *rqstp)
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int ret = SVC_OK;
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/* Don't talk to strangers */
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clp = nfs_find_client(svc_addr(rqstp), 4);
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clp = nfs_cb_find_client(rqstp);
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if (clp == NULL)
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return SVC_DROP;
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@ -34,10 +34,17 @@ enum nfs4_callback_opnum {
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OP_CB_ILLEGAL = 10044,
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};
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struct cb_process_state {
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__be32 drc_status;
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struct nfs_client *clp;
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struct nfs4_sessionid *svc_sid; /* v4.1 callback service sessionid */
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};
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struct cb_compound_hdr_arg {
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unsigned int taglen;
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const char *tag;
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unsigned int minorversion;
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unsigned int cb_ident; /* v4.0 callback identifier */
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unsigned nops;
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};
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@ -103,8 +110,9 @@ struct cb_sequenceres {
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uint32_t csr_target_highestslotid;
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};
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extern unsigned nfs4_callback_sequence(struct cb_sequenceargs *args,
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struct cb_sequenceres *res);
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extern __be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
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struct cb_sequenceres *res,
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struct cb_process_state *cps);
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extern int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation,
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const nfs4_stateid *stateid);
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@ -118,19 +126,25 @@ struct cb_recallanyargs {
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uint32_t craa_type_mask;
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};
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extern unsigned nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy);
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extern __be32 nfs4_callback_recallany(struct cb_recallanyargs *args,
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void *dummy,
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struct cb_process_state *cps);
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struct cb_recallslotargs {
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struct sockaddr *crsa_addr;
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uint32_t crsa_target_max_slots;
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};
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extern unsigned nfs4_callback_recallslot(struct cb_recallslotargs *args,
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void *dummy);
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extern __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args,
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void *dummy,
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struct cb_process_state *cps);
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#endif /* CONFIG_NFS_V4_1 */
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extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res);
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extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy);
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extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args,
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struct cb_getattrres *res,
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struct cb_process_state *cps);
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extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy,
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struct cb_process_state *cps);
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#ifdef CONFIG_NFS_V4
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extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt);
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@ -17,25 +17,27 @@
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#define NFSDBG_FACILITY NFSDBG_CALLBACK
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#endif
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__be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res)
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__be32 nfs4_callback_getattr(struct cb_getattrargs *args,
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struct cb_getattrres *res,
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struct cb_process_state *cps)
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{
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struct nfs_client *clp;
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struct nfs_delegation *delegation;
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struct nfs_inode *nfsi;
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struct inode *inode;
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res->bitmap[0] = res->bitmap[1] = 0;
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res->status = htonl(NFS4ERR_BADHANDLE);
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clp = nfs_find_client(args->addr, 4);
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if (clp == NULL)
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res->status = htonl(NFS4ERR_OP_NOT_IN_SESSION);
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if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */
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goto out;
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dprintk("NFS: GETATTR callback request from %s\n",
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rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR));
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res->bitmap[0] = res->bitmap[1] = 0;
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res->status = htonl(NFS4ERR_BADHANDLE);
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inode = nfs_delegation_find_inode(clp, &args->fh);
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dprintk("NFS: GETATTR callback request from %s\n",
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rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
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inode = nfs_delegation_find_inode(cps->clp, &args->fh);
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if (inode == NULL)
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goto out_putclient;
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goto out;
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nfsi = NFS_I(inode);
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rcu_read_lock();
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delegation = rcu_dereference(nfsi->delegation);
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@ -55,49 +57,41 @@ __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *
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out_iput:
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rcu_read_unlock();
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iput(inode);
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out_putclient:
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nfs_put_client(clp);
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out:
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dprintk("%s: exit with status = %d\n", __func__, ntohl(res->status));
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return res->status;
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}
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__be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy)
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__be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy,
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struct cb_process_state *cps)
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{
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struct nfs_client *clp;
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struct inode *inode;
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__be32 res;
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res = htonl(NFS4ERR_BADHANDLE);
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clp = nfs_find_client(args->addr, 4);
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if (clp == NULL)
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res = htonl(NFS4ERR_OP_NOT_IN_SESSION);
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if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */
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goto out;
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dprintk("NFS: RECALL callback request from %s\n",
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rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR));
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rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
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do {
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struct nfs_client *prev = clp;
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inode = nfs_delegation_find_inode(clp, &args->fh);
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if (inode != NULL) {
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/* Set up a helper thread to actually return the delegation */
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switch (nfs_async_inode_return_delegation(inode, &args->stateid)) {
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case 0:
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res = 0;
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break;
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case -ENOENT:
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if (res != 0)
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res = htonl(NFS4ERR_BAD_STATEID);
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break;
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default:
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res = htonl(NFS4ERR_RESOURCE);
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}
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iput(inode);
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}
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clp = nfs_find_client_next(prev);
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nfs_put_client(prev);
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} while (clp != NULL);
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res = htonl(NFS4ERR_BADHANDLE);
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inode = nfs_delegation_find_inode(cps->clp, &args->fh);
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if (inode == NULL)
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goto out;
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/* Set up a helper thread to actually return the delegation */
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switch (nfs_async_inode_return_delegation(inode, &args->stateid)) {
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case 0:
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res = 0;
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break;
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case -ENOENT:
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if (res != 0)
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res = htonl(NFS4ERR_BAD_STATEID);
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break;
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default:
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res = htonl(NFS4ERR_RESOURCE);
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}
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iput(inode);
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out:
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dprintk("%s: exit with status = %d\n", __func__, ntohl(res));
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return res;
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@ -184,42 +178,6 @@ validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args)
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return htonl(NFS4ERR_SEQ_MISORDERED);
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}
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/*
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* Returns a pointer to a held 'struct nfs_client' that matches the server's
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* address, major version number, and session ID. It is the caller's
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* responsibility to release the returned reference.
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*
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* Returns NULL if there are no connections with sessions, or if no session
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* matches the one of interest.
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*/
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static struct nfs_client *find_client_with_session(
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const struct sockaddr *addr, u32 nfsversion,
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struct nfs4_sessionid *sessionid)
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{
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struct nfs_client *clp;
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clp = nfs_find_client(addr, 4);
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if (clp == NULL)
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return NULL;
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do {
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struct nfs_client *prev = clp;
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if (clp->cl_session != NULL) {
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if (memcmp(clp->cl_session->sess_id.data,
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sessionid->data,
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NFS4_MAX_SESSIONID_LEN) == 0) {
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/* Returns a held reference to clp */
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return clp;
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}
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}
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clp = nfs_find_client_next(prev);
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nfs_put_client(prev);
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} while (clp != NULL);
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return NULL;
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}
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/*
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* For each referring call triple, check the session's slot table for
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* a match. If the slot is in use and the sequence numbers match, the
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@ -276,20 +234,28 @@ out:
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}
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__be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
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struct cb_sequenceres *res)
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struct cb_sequenceres *res,
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struct cb_process_state *cps)
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{
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struct nfs_client *clp;
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int i;
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__be32 status;
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cps->clp = NULL;
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status = htonl(NFS4ERR_BADSESSION);
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clp = find_client_with_session(args->csa_addr, 4, &args->csa_sessionid);
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/* Incoming session must match the callback session */
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if (memcmp(&args->csa_sessionid, cps->svc_sid, NFS4_MAX_SESSIONID_LEN))
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goto out;
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clp = nfs4_find_client_sessionid(args->csa_addr,
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&args->csa_sessionid, 1);
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if (clp == NULL)
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goto out;
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status = validate_seqid(&clp->cl_session->bc_slot_table, args);
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if (status)
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goto out_putclient;
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goto out;
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/*
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* Check for pending referring calls. If a match is found, a
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@ -298,7 +264,7 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
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*/
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if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists)) {
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status = htonl(NFS4ERR_DELAY);
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goto out_putclient;
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goto out;
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}
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memcpy(&res->csr_sessionid, &args->csa_sessionid,
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@ -307,36 +273,36 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
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res->csr_slotid = args->csa_slotid;
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res->csr_highestslotid = NFS41_BC_MAX_CALLBACKS - 1;
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res->csr_target_highestslotid = NFS41_BC_MAX_CALLBACKS - 1;
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cps->clp = clp; /* put in nfs4_callback_compound */
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out_putclient:
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nfs_put_client(clp);
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out:
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for (i = 0; i < args->csa_nrclists; i++)
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kfree(args->csa_rclists[i].rcl_refcalls);
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kfree(args->csa_rclists);
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if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP))
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res->csr_status = 0;
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else
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if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) {
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cps->drc_status = status;
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status = 0;
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} else
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res->csr_status = status;
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dprintk("%s: exit with status = %d res->csr_status %d\n", __func__,
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ntohl(status), ntohl(res->csr_status));
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return status;
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}
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__be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy)
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__be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy,
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struct cb_process_state *cps)
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{
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struct nfs_client *clp;
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__be32 status;
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fmode_t flags = 0;
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status = htonl(NFS4ERR_OP_NOT_IN_SESSION);
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clp = nfs_find_client(args->craa_addr, 4);
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if (clp == NULL)
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if (!cps->clp) /* set in cb_sequence */
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goto out;
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dprintk("NFS: RECALL_ANY callback request from %s\n",
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rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR));
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rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
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if (test_bit(RCA4_TYPE_MASK_RDATA_DLG, (const unsigned long *)
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&args->craa_type_mask))
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@ -346,7 +312,7 @@ __be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy)
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flags |= FMODE_WRITE;
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if (flags)
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nfs_expire_all_delegation_types(clp, flags);
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nfs_expire_all_delegation_types(cps->clp, flags);
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status = htonl(NFS4_OK);
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out:
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dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
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@ -354,36 +320,33 @@ out:
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}
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/* Reduce the fore channel's max_slots to the target value */
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__be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy)
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__be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy,
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struct cb_process_state *cps)
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{
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struct nfs_client *clp;
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struct nfs4_slot_table *fc_tbl;
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__be32 status;
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status = htonl(NFS4ERR_OP_NOT_IN_SESSION);
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clp = nfs_find_client(args->crsa_addr, 4);
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if (clp == NULL)
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if (!cps->clp) /* set in cb_sequence */
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goto out;
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dprintk("NFS: CB_RECALL_SLOT request from %s target max slots %d\n",
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rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
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rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR),
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args->crsa_target_max_slots);
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fc_tbl = &clp->cl_session->fc_slot_table;
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fc_tbl = &cps->clp->cl_session->fc_slot_table;
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status = htonl(NFS4ERR_BAD_HIGH_SLOT);
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if (args->crsa_target_max_slots > fc_tbl->max_slots ||
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args->crsa_target_max_slots < 1)
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goto out_putclient;
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goto out;
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status = htonl(NFS4_OK);
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if (args->crsa_target_max_slots == fc_tbl->max_slots)
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goto out_putclient;
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goto out;
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fc_tbl->target_max_slots = args->crsa_target_max_slots;
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nfs41_handle_recall_slot(clp);
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out_putclient:
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nfs_put_client(clp); /* balance nfs_find_client */
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nfs41_handle_recall_slot(cps->clp);
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out:
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dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
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return status;
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@ -10,8 +10,10 @@
|
||||
#include <linux/nfs4.h>
|
||||
#include <linux/nfs_fs.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/sunrpc/bc_xprt.h>
|
||||
#include "nfs4_fs.h"
|
||||
#include "callback.h"
|
||||
#include "internal.h"
|
||||
|
||||
#define CB_OP_TAGLEN_MAXSZ (512)
|
||||
#define CB_OP_HDR_RES_MAXSZ (2 + CB_OP_TAGLEN_MAXSZ)
|
||||
@ -33,7 +35,8 @@
|
||||
/* Internal error code */
|
||||
#define NFS4ERR_RESOURCE_HDR 11050
|
||||
|
||||
typedef __be32 (*callback_process_op_t)(void *, void *);
|
||||
typedef __be32 (*callback_process_op_t)(void *, void *,
|
||||
struct cb_process_state *);
|
||||
typedef __be32 (*callback_decode_arg_t)(struct svc_rqst *, struct xdr_stream *, void *);
|
||||
typedef __be32 (*callback_encode_res_t)(struct svc_rqst *, struct xdr_stream *, void *);
|
||||
|
||||
@ -160,7 +163,7 @@ static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound
|
||||
hdr->minorversion = ntohl(*p++);
|
||||
/* Check minor version is zero or one. */
|
||||
if (hdr->minorversion <= 1) {
|
||||
p++; /* skip callback_ident */
|
||||
hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 */
|
||||
} else {
|
||||
printk(KERN_WARNING "%s: NFSv4 server callback with "
|
||||
"illegal minor version %u!\n",
|
||||
@ -621,7 +624,8 @@ preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op)
|
||||
static __be32 process_op(uint32_t minorversion, int nop,
|
||||
struct svc_rqst *rqstp,
|
||||
struct xdr_stream *xdr_in, void *argp,
|
||||
struct xdr_stream *xdr_out, void *resp, int* drc_status)
|
||||
struct xdr_stream *xdr_out, void *resp,
|
||||
struct cb_process_state *cps)
|
||||
{
|
||||
struct callback_op *op = &callback_ops[0];
|
||||
unsigned int op_nr;
|
||||
@ -644,8 +648,8 @@ static __be32 process_op(uint32_t minorversion, int nop,
|
||||
if (status)
|
||||
goto encode_hdr;
|
||||
|
||||
if (*drc_status) {
|
||||
status = *drc_status;
|
||||
if (cps->drc_status) {
|
||||
status = cps->drc_status;
|
||||
goto encode_hdr;
|
||||
}
|
||||
|
||||
@ -653,16 +657,10 @@ static __be32 process_op(uint32_t minorversion, int nop,
|
||||
if (maxlen > 0 && maxlen < PAGE_SIZE) {
|
||||
status = op->decode_args(rqstp, xdr_in, argp);
|
||||
if (likely(status == 0))
|
||||
status = op->process_op(argp, resp);
|
||||
status = op->process_op(argp, resp, cps);
|
||||
} else
|
||||
status = htonl(NFS4ERR_RESOURCE);
|
||||
|
||||
/* Only set by OP_CB_SEQUENCE processing */
|
||||
if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) {
|
||||
*drc_status = status;
|
||||
status = 0;
|
||||
}
|
||||
|
||||
encode_hdr:
|
||||
res = encode_op_hdr(xdr_out, op_nr, status);
|
||||
if (unlikely(res))
|
||||
@ -681,8 +679,11 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *r
|
||||
struct cb_compound_hdr_arg hdr_arg = { 0 };
|
||||
struct cb_compound_hdr_res hdr_res = { NULL };
|
||||
struct xdr_stream xdr_in, xdr_out;
|
||||
__be32 *p;
|
||||
__be32 status, drc_status = 0;
|
||||
__be32 *p, status;
|
||||
struct cb_process_state cps = {
|
||||
.drc_status = 0,
|
||||
.clp = NULL,
|
||||
};
|
||||
unsigned int nops = 0;
|
||||
|
||||
dprintk("%s: start\n", __func__);
|
||||
@ -696,6 +697,13 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *r
|
||||
if (status == __constant_htonl(NFS4ERR_RESOURCE))
|
||||
return rpc_garbage_args;
|
||||
|
||||
if (hdr_arg.minorversion == 0) {
|
||||
cps.clp = nfs4_find_client_ident(hdr_arg.cb_ident);
|
||||
if (!cps.clp)
|
||||
return rpc_drop_reply;
|
||||
} else
|
||||
cps.svc_sid = bc_xprt_sid(rqstp);
|
||||
|
||||
hdr_res.taglen = hdr_arg.taglen;
|
||||
hdr_res.tag = hdr_arg.tag;
|
||||
if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0)
|
||||
@ -703,7 +711,7 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *r
|
||||
|
||||
while (status == 0 && nops != hdr_arg.nops) {
|
||||
status = process_op(hdr_arg.minorversion, nops, rqstp,
|
||||
&xdr_in, argp, &xdr_out, resp, &drc_status);
|
||||
&xdr_in, argp, &xdr_out, resp, &cps);
|
||||
nops++;
|
||||
}
|
||||
|
||||
@ -716,6 +724,7 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *r
|
||||
|
||||
*hdr_res.status = status;
|
||||
*hdr_res.nops = htonl(nops);
|
||||
nfs_put_client(cps.clp);
|
||||
dprintk("%s: done, status = %u\n", __func__, ntohl(status));
|
||||
return rpc_success;
|
||||
}
|
||||
|
||||
171
fs/nfs/client.c
171
fs/nfs/client.c
@ -410,70 +410,28 @@ static int nfs_sockaddr_cmp(const struct sockaddr *sa1,
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Find a client by IP address and protocol version
|
||||
* - returns NULL if no such client
|
||||
*/
|
||||
struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion)
|
||||
/* Common match routine for v4.0 and v4.1 callback services */
|
||||
bool
|
||||
nfs4_cb_match_client(const struct sockaddr *addr, struct nfs_client *clp,
|
||||
u32 minorversion)
|
||||
{
|
||||
struct nfs_client *clp;
|
||||
struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
|
||||
|
||||
spin_lock(&nfs_client_lock);
|
||||
list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
|
||||
struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
|
||||
/* Don't match clients that failed to initialise */
|
||||
if (!(clp->cl_cons_state == NFS_CS_READY ||
|
||||
clp->cl_cons_state == NFS_CS_SESSION_INITING))
|
||||
return false;
|
||||
|
||||
/* Don't match clients that failed to initialise properly */
|
||||
if (!(clp->cl_cons_state == NFS_CS_READY ||
|
||||
clp->cl_cons_state == NFS_CS_SESSION_INITING))
|
||||
continue;
|
||||
/* Match the version and minorversion */
|
||||
if (clp->rpc_ops->version != 4 ||
|
||||
clp->cl_minorversion != minorversion)
|
||||
return false;
|
||||
|
||||
/* Different NFS versions cannot share the same nfs_client */
|
||||
if (clp->rpc_ops->version != nfsversion)
|
||||
continue;
|
||||
/* Match only the IP address, not the port number */
|
||||
if (!nfs_sockaddr_match_ipaddr(addr, clap))
|
||||
return false;
|
||||
|
||||
/* Match only the IP address, not the port number */
|
||||
if (!nfs_sockaddr_match_ipaddr(addr, clap))
|
||||
continue;
|
||||
|
||||
atomic_inc(&clp->cl_count);
|
||||
spin_unlock(&nfs_client_lock);
|
||||
return clp;
|
||||
}
|
||||
spin_unlock(&nfs_client_lock);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/*
|
||||
* Find a client by IP address and protocol version
|
||||
* - returns NULL if no such client
|
||||
*/
|
||||
struct nfs_client *nfs_find_client_next(struct nfs_client *clp)
|
||||
{
|
||||
struct sockaddr *sap = (struct sockaddr *)&clp->cl_addr;
|
||||
u32 nfsvers = clp->rpc_ops->version;
|
||||
|
||||
spin_lock(&nfs_client_lock);
|
||||
list_for_each_entry_continue(clp, &nfs_client_list, cl_share_link) {
|
||||
struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
|
||||
|
||||
/* Don't match clients that failed to initialise properly */
|
||||
if (clp->cl_cons_state != NFS_CS_READY)
|
||||
continue;
|
||||
|
||||
/* Different NFS versions cannot share the same nfs_client */
|
||||
if (clp->rpc_ops->version != nfsvers)
|
||||
continue;
|
||||
|
||||
/* Match only the IP address, not the port number */
|
||||
if (!nfs_sockaddr_match_ipaddr(sap, clap))
|
||||
continue;
|
||||
|
||||
atomic_inc(&clp->cl_count);
|
||||
spin_unlock(&nfs_client_lock);
|
||||
return clp;
|
||||
}
|
||||
spin_unlock(&nfs_client_lock);
|
||||
return NULL;
|
||||
return true;
|
||||
}
|
||||
|
||||
/*
|
||||
@ -1171,6 +1129,101 @@ error:
|
||||
}
|
||||
|
||||
#ifdef CONFIG_NFS_V4
|
||||
/*
|
||||
* NFSv4.0 callback thread helper
|
||||
*
|
||||
* Find a client by IP address, protocol version, and minorversion
|
||||
*
|
||||
* Called from the pg_authenticate method. The callback identifier
|
||||
* is not used as it has not been decoded.
|
||||
*
|
||||
* Returns NULL if no such client
|
||||
*/
|
||||
struct nfs_client *
|
||||
nfs4_find_client_no_ident(const struct sockaddr *addr)
|
||||
{
|
||||
struct nfs_client *clp;
|
||||
|
||||
spin_lock(&nfs_client_lock);
|
||||
list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
|
||||
if (nfs4_cb_match_client(addr, clp, 0) == false)
|
||||
continue;
|
||||
atomic_inc(&clp->cl_count);
|
||||
spin_unlock(&nfs_client_lock);
|
||||
return clp;
|
||||
}
|
||||
spin_unlock(&nfs_client_lock);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/*
|
||||
* NFSv4.0 callback thread helper
|
||||
*
|
||||
* Find a client by callback identifier
|
||||
*/
|
||||
struct nfs_client *
|
||||
nfs4_find_client_ident(int cb_ident)
|
||||
{
|
||||
struct nfs_client *clp;
|
||||
|
||||
spin_lock(&nfs_client_lock);
|
||||
clp = idr_find(&cb_ident_idr, cb_ident);
|
||||
if (clp)
|
||||
atomic_inc(&clp->cl_count);
|
||||
spin_unlock(&nfs_client_lock);
|
||||
return clp;
|
||||
}
|
||||
|
||||
#if defined(CONFIG_NFS_V4_1)
|
||||
/*
|
||||
* NFSv4.1 callback thread helper
|
||||
* For CB_COMPOUND calls, find a client by IP address, protocol version,
|
||||
* minorversion, and sessionID
|
||||
*
|
||||
* CREATE_SESSION triggers a CB_NULL ping from servers. The callback service
|
||||
* sessionid can only be set after the CREATE_SESSION return, so a CB_NULL
|
||||
* can arrive before the callback sessionid is set. For CB_NULL calls,
|
||||
* find a client by IP address protocol version, and minorversion.
|
||||
*
|
||||
* Returns NULL if no such client
|
||||
*/
|
||||
struct nfs_client *
|
||||
nfs4_find_client_sessionid(const struct sockaddr *addr,
|
||||
struct nfs4_sessionid *sid, int is_cb_compound)
|
||||
{
|
||||
struct nfs_client *clp;
|
||||
|
||||
spin_lock(&nfs_client_lock);
|
||||
list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
|
||||
if (nfs4_cb_match_client(addr, clp, 1) == false)
|
||||
continue;
|
||||
|
||||
if (!nfs4_has_session(clp))
|
||||
continue;
|
||||
|
||||
/* Match sessionid unless cb_null call*/
|
||||
if (is_cb_compound && (memcmp(clp->cl_session->sess_id.data,
|
||||
sid->data, NFS4_MAX_SESSIONID_LEN) != 0))
|
||||
continue;
|
||||
|
||||
atomic_inc(&clp->cl_count);
|
||||
spin_unlock(&nfs_client_lock);
|
||||
return clp;
|
||||
}
|
||||
spin_unlock(&nfs_client_lock);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
#else /* CONFIG_NFS_V4_1 */
|
||||
|
||||
struct nfs_client *
|
||||
nfs4_find_client_sessionid(const struct sockaddr *addr,
|
||||
struct nfs4_sessionid *sid, int is_cb_compound)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
#endif /* CONFIG_NFS_V4_1 */
|
||||
|
||||
/*
|
||||
* Initialize the NFS4 callback service
|
||||
*/
|
||||
|
||||
@ -130,8 +130,11 @@ extern struct rpc_program nfs_program;
|
||||
|
||||
extern void nfs_cleanup_cb_ident_idr(void);
|
||||
extern void nfs_put_client(struct nfs_client *);
|
||||
extern struct nfs_client *nfs_find_client(const struct sockaddr *, u32);
|
||||
extern struct nfs_client *nfs_find_client_next(struct nfs_client *);
|
||||
extern struct nfs_client *nfs4_find_client_no_ident(const struct sockaddr *);
|
||||
extern struct nfs_client *nfs4_find_client_ident(int);
|
||||
extern struct nfs_client *
|
||||
nfs4_find_client_sessionid(const struct sockaddr *, struct nfs4_sessionid *,
|
||||
int);
|
||||
extern struct nfs_server *nfs_create_server(
|
||||
const struct nfs_parsed_mount_data *,
|
||||
struct nfs_fh *);
|
||||
|
||||
@ -47,6 +47,14 @@ static inline int svc_is_backchannel(const struct svc_rqst *rqstp)
|
||||
return 1;
|
||||
return 0;
|
||||
}
|
||||
static inline struct nfs4_sessionid *bc_xprt_sid(struct svc_rqst *rqstp)
|
||||
{
|
||||
if (svc_is_backchannel(rqstp))
|
||||
return (struct nfs4_sessionid *)
|
||||
rqstp->rq_server->bc_xprt->xpt_bc_sid;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
#else /* CONFIG_NFS_V4_1 */
|
||||
static inline int xprt_setup_backchannel(struct rpc_xprt *xprt,
|
||||
unsigned int min_reqs)
|
||||
@ -59,6 +67,11 @@ static inline int svc_is_backchannel(const struct svc_rqst *rqstp)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline struct nfs4_sessionid *bc_xprt_sid(struct svc_rqst *rqstp)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static inline void xprt_free_bc_request(struct rpc_rqst *req)
|
||||
{
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user