X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=fs%2Fnfsd%2Fnfs4callback.c;h=aae2b29ae2c9e6d4b645f91bf68b50046030accc;hb=f698f1f7ad69f700dd1c754aa2b4aa7acbd51703;hp=1a55dfcb74bcb62b5bfb10fae788a3b56afc4f75;hpb=f1ee4f22f21d74bc3ca63b95ca5b63d3a8620527;p=safe%2Fjmp%2Flinux-2.6 diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index 1a55dfc..aae2b29 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -33,12 +33,13 @@ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -#include #include #include #include #include #include +#include +#include #include #include #include @@ -53,8 +54,7 @@ #define NFSPROC4_CB_COMPOUND 1 /* declarations */ -static void nfs4_cb_null(struct rpc_task *task); -extern spinlock_t recall_lock; +static const struct rpc_call_ops nfs4_cb_null_ops; /* Index of predefined Linux callback client operations */ @@ -76,7 +76,7 @@ enum nfs_cb_opnum4 { #define op_enc_sz 1 #define op_dec_sz 2 #define enc_nfs4_fh_sz (1 + (NFS4_FHSIZE >> 2)) -#define enc_stateid_sz 16 +#define enc_stateid_sz (NFS4_STATEID_SIZE >> 2) #define NFS4_enc_cb_recall_sz (cb_compound_enc_hdr_sz + \ 1 + enc_stateid_sz + \ enc_nfs4_fh_sz) @@ -87,8 +87,8 @@ enum nfs_cb_opnum4 { /* * Generic encode routines from fs/nfs/nfs4xdr.c */ -static inline u32 * -xdr_writemem(u32 *p, const void *ptr, int nbytes) +static inline __be32 * +xdr_writemem(__be32 *p, const void *ptr, int nbytes) { int tmp = XDR_QUADLEN(nbytes); if (!tmp) @@ -133,7 +133,7 @@ xdr_error: \ #define READ_BUF(nbytes) do { \ p = xdr_inline_decode(xdr, nbytes); \ if (!p) { \ - dprintk("NFSD: %s: reply buffer overflowed in line %d.", \ + dprintk("NFSD: %s: reply buffer overflowed in line %d.\n", \ __FUNCTION__, __LINE__); \ return -EIO; \ } \ @@ -207,7 +207,7 @@ nfs_cb_stat_to_errno(int stat) static int encode_cb_compound_hdr(struct xdr_stream *xdr, struct nfs4_cb_compound_hdr *hdr) { - u32 * p; + __be32 * p; RESERVE_SPACE(16); WRITE32(0); /* tag length is always 0 */ @@ -220,7 +220,7 @@ encode_cb_compound_hdr(struct xdr_stream *xdr, struct nfs4_cb_compound_hdr *hdr) static int encode_cb_recall(struct xdr_stream *xdr, struct nfs4_cb_recall *cb_rec) { - u32 *p; + __be32 *p; int len = cb_rec->cbr_fhlen; RESERVE_SPACE(12+sizeof(cb_rec->cbr_stateid) + len); @@ -233,7 +233,7 @@ encode_cb_recall(struct xdr_stream *xdr, struct nfs4_cb_recall *cb_rec) } static int -nfs4_xdr_enc_cb_null(struct rpc_rqst *req, u32 *p) +nfs4_xdr_enc_cb_null(struct rpc_rqst *req, __be32 *p) { struct xdr_stream xdrs, *xdr = &xdrs; @@ -243,7 +243,7 @@ nfs4_xdr_enc_cb_null(struct rpc_rqst *req, u32 *p) } static int -nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, u32 *p, struct nfs4_cb_recall *args) +nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, __be32 *p, struct nfs4_cb_recall *args) { struct xdr_stream xdr; struct nfs4_cb_compound_hdr hdr = { @@ -259,7 +259,7 @@ nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, u32 *p, struct nfs4_cb_recall *args static int decode_cb_compound_hdr(struct xdr_stream *xdr, struct nfs4_cb_compound_hdr *hdr){ - u32 *p; + __be32 *p; READ_BUF(8); READ32(hdr->status); @@ -274,7 +274,7 @@ decode_cb_compound_hdr(struct xdr_stream *xdr, struct nfs4_cb_compound_hdr *hdr) static int decode_cb_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected) { - u32 *p; + __be32 *p; u32 op; int32_t nfserr; @@ -293,13 +293,13 @@ decode_cb_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected) } static int -nfs4_xdr_dec_cb_null(struct rpc_rqst *req, u32 *p) +nfs4_xdr_dec_cb_null(struct rpc_rqst *req, __be32 *p) { return 0; } static int -nfs4_xdr_dec_cb_recall(struct rpc_rqst *rqstp, u32 *p) +nfs4_xdr_dec_cb_recall(struct rpc_rqst *rqstp, __be32 *p) { struct xdr_stream xdr; struct nfs4_cb_compound_hdr hdr; @@ -317,26 +317,25 @@ out: /* * RPC procedure tables */ -#ifndef MAX -# define MAX(a, b) (((a) > (b))? (a) : (b)) -#endif - #define PROC(proc, call, argtype, restype) \ [NFSPROC4_CLNT_##proc] = { \ .p_proc = NFSPROC4_CB_##call, \ .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \ .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \ - .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2, \ + .p_arglen = NFS4_##argtype##_sz, \ + .p_replen = NFS4_##restype##_sz, \ + .p_statidx = NFSPROC4_CB_##call, \ + .p_name = #proc, \ } -struct rpc_procinfo nfs4_cb_procedures[] = { +static struct rpc_procinfo nfs4_cb_procedures[] = { PROC(CB_NULL, NULL, enc_cb_null, dec_cb_null), PROC(CB_RECALL, COMPOUND, enc_cb_recall, dec_cb_recall), }; -struct rpc_version nfs_cb_version4 = { +static struct rpc_version nfs_cb_version4 = { .number = 1, - .nrprocs = sizeof(nfs4_cb_procedures)/sizeof(nfs4_cb_procedures[0]), + .nrprocs = ARRAY_SIZE(nfs4_cb_procedures), .procs = nfs4_cb_procedures }; @@ -345,152 +344,100 @@ static struct rpc_version * nfs_cb_version[] = { &nfs_cb_version4, }; -/* - * Use the SETCLIENTID credential - */ -struct rpc_cred * -nfsd4_lookupcred(struct nfs4_client *clp, int taskflags) -{ - struct auth_cred acred; - struct rpc_clnt *clnt = clp->cl_callback.cb_client; - struct rpc_cred *ret; - - get_group_info(clp->cl_cred.cr_group_info); - acred.uid = clp->cl_cred.cr_uid; - acred.gid = clp->cl_cred.cr_gid; - acred.group_info = clp->cl_cred.cr_group_info; - - dprintk("NFSD: looking up %s cred\n", - clnt->cl_auth->au_ops->au_name); - ret = rpcauth_lookup_credcache(clnt->cl_auth, &acred, taskflags); - put_group_info(clp->cl_cred.cr_group_info); - return ret; -} +/* Reference counting, callback cleanup, etc., all look racy as heck. + * And why is cb_set an atomic? */ -/* - * Set up the callback client and put a NFSPROC4_CB_NULL on the wire... - */ -void -nfsd4_probe_callback(struct nfs4_client *clp) +static int do_probe_callback(void *data) { + struct nfs4_client *clp = data; struct sockaddr_in addr; struct nfs4_callback *cb = &clp->cl_callback; - struct rpc_timeout timeparms; - struct rpc_xprt * xprt; + struct rpc_timeout timeparms = { + .to_initval = (NFSD_LEASE_TIME/4) * HZ, + .to_retries = 5, + .to_maxval = (NFSD_LEASE_TIME/2) * HZ, + .to_exponential = 1, + }; struct rpc_program * program = &cb->cb_program; - struct rpc_stat * stat = &cb->cb_stat; - struct rpc_clnt * clnt; + struct rpc_create_args args = { + .protocol = IPPROTO_TCP, + .address = (struct sockaddr *)&addr, + .addrsize = sizeof(addr), + .timeout = &timeparms, + .program = program, + .version = nfs_cb_version[1]->number, + .authflavor = RPC_AUTH_UNIX, /* XXX: need AUTH_GSS... */ + .flags = (RPC_CLNT_CREATE_NOPING), + }; struct rpc_message msg = { .rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL], .rpc_argp = clp, }; - char hostname[32]; + struct rpc_clnt *client; int status; - dprintk("NFSD: probe_callback. cb_parsed %d cb_set %d\n", - cb->cb_parsed, atomic_read(&cb->cb_set)); - if (!cb->cb_parsed || atomic_read(&cb->cb_set)) - return; - /* Initialize address */ memset(&addr, 0, sizeof(addr)); addr.sin_family = AF_INET; addr.sin_port = htons(cb->cb_port); addr.sin_addr.s_addr = htonl(cb->cb_addr); - /* Initialize timeout */ - timeparms.to_initval = (NFSD_LEASE_TIME/4) * HZ; - timeparms.to_retries = 0; - timeparms.to_maxval = (NFSD_LEASE_TIME/2) * HZ; - timeparms.to_exponential = 1; - - /* Create RPC transport */ - xprt = xprt_create_proto(IPPROTO_TCP, &addr, &timeparms); - if (IS_ERR(xprt)) { - dprintk("NFSD: couldn't create callback transport!\n"); - goto out_err; - } - /* Initialize rpc_program */ program->name = "nfs4_cb"; program->number = cb->cb_prog; - program->nrvers = sizeof(nfs_cb_version)/sizeof(nfs_cb_version[0]); + program->nrvers = ARRAY_SIZE(nfs_cb_version); program->version = nfs_cb_version; - program->stats = stat; + program->stats = &cb->cb_stat; /* Initialize rpc_stat */ - memset(stat, 0, sizeof(struct rpc_stat)); - stat->program = program; + memset(program->stats, 0, sizeof(cb->cb_stat)); + program->stats->program = program; - /* Create RPC client - * - * XXX AUTH_UNIX only - need AUTH_GSS.... - */ - sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(addr.sin_addr.s_addr)); - clnt = rpc_create_client(xprt, hostname, program, 1, RPC_AUTH_UNIX); - if (IS_ERR(clnt)) { + /* Create RPC client */ + client = rpc_create(&args); + if (IS_ERR(client)) { dprintk("NFSD: couldn't create callback client\n"); - goto out_xprt; - } - clnt->cl_intr = 0; - clnt->cl_softrtry = 1; - clnt->cl_chatty = 1; - - /* Kick rpciod, put the call on the wire. */ - - if (rpciod_up() != 0) { - dprintk("nfsd: couldn't start rpciod for callbacks!\n"); - goto out_clnt; + status = PTR_ERR(client); + goto out_err; } - /* the task holds a reference to the nfs4_client struct */ - cb->cb_client = clnt; - atomic_inc(&clp->cl_count); + status = rpc_call_sync(client, &msg, RPC_TASK_SOFT); - msg.rpc_cred = nfsd4_lookupcred(clp,0); - if (IS_ERR(msg.rpc_cred)) - goto out_rpciod; - status = rpc_call_async(clnt, &msg, RPC_TASK_ASYNC, nfs4_cb_null, NULL); - put_rpccred(msg.rpc_cred); - - if (status != 0) { - dprintk("NFSD: asynchronous NFSPROC4_CB_NULL failed!\n"); - goto out_rpciod; - } - return; + if (status) + goto out_release_client; -out_rpciod: - atomic_dec(&clp->cl_count); - rpciod_down(); -out_clnt: - rpc_shutdown_client(clnt); - goto out_err; -out_xprt: - xprt_destroy(xprt); + cb->cb_client = client; + atomic_set(&cb->cb_set, 1); + put_nfs4_client(clp); + return 0; +out_release_client: + rpc_shutdown_client(client); out_err: + put_nfs4_client(clp); dprintk("NFSD: warning: no callback path to client %.*s\n", (int)clp->cl_name.len, clp->cl_name.data); - cb->cb_client = NULL; + return status; } -static void -nfs4_cb_null(struct rpc_task *task) +/* + * Set up the callback client and put a NFSPROC4_CB_NULL on the wire... + */ +void +nfsd4_probe_callback(struct nfs4_client *clp) { - struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp; - struct nfs4_callback *cb = &clp->cl_callback; - u32 addr = htonl(cb->cb_addr); + struct task_struct *t; - dprintk("NFSD: nfs4_cb_null task->tk_status %d\n", task->tk_status); + BUG_ON(atomic_read(&clp->cl_callback.cb_set)); - if (task->tk_status < 0) { - dprintk("NFSD: callback establishment to client %.*s failed\n", - (int)clp->cl_name.len, clp->cl_name.data); - goto out; - } - atomic_set(&cb->cb_set, 1); - dprintk("NFSD: callback set to client %u.%u.%u.%u\n", NIPQUAD(addr)); -out: - put_nfs4_client(clp); + /* the task holds a reference to the nfs4_client struct */ + atomic_inc(&clp->cl_count); + + t = kthread_run(do_probe_callback, clp, "nfs4_cb_probe"); + + if (IS_ERR(t)) + atomic_dec(&clp->cl_count); + + return; } /* @@ -510,13 +457,6 @@ nfsd4_cb_recall(struct nfs4_delegation *dp) int retries = 1; int status = 0; - if ((!atomic_read(&clp->cl_callback.cb_set)) || !clnt) - return; - - msg.rpc_cred = nfsd4_lookupcred(clp, 0); - if (IS_ERR(msg.rpc_cred)) - goto out; - cbr->cbr_trunc = 0; /* XXX need to implement truncate optimization */ cbr->cbr_dp = dp; @@ -525,6 +465,7 @@ nfsd4_cb_recall(struct nfs4_delegation *dp) switch (status) { case -EIO: /* Network partition? */ + atomic_set(&clp->cl_callback.cb_set, 0); case -EBADHANDLE: case -NFS4ERR_BAD_STATEID: /* Race: client probably got cb_recall @@ -537,13 +478,11 @@ nfsd4_cb_recall(struct nfs4_delegation *dp) status = rpc_call_sync(clnt, &msg, RPC_TASK_SOFT); } out_put_cred: - put_rpccred(msg.rpc_cred); -out: - if (status == -EIO) - atomic_set(&clp->cl_callback.cb_set, 0); - /* Success or failure, now we're either waiting for lease expiration - * or deleg_return. */ - dprintk("NFSD: nfs4_cb_recall: dp %p dl_flock %p dl_count %d\n",dp, dp->dl_flock, atomic_read(&dp->dl_count)); + /* + * Success or failure, now we're either waiting for lease expiration + * or deleg_return. + */ + put_nfs4_client(clp); nfs4_put_delegation(dp); return; }