git: 24938f9311c9 - main - lib/libc/rpc: switch the per-fd structs in clnt_{dg,vc}.c to RB Trees
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Date: Wed, 15 Nov 2023 23:13:11 UTC
The branch main has been updated by asomers: URL: https://cgit.FreeBSD.org/src/commit/?id=24938f9311c9c9acc1ce747f4e6a088c2dbc967d commit 24938f9311c9c9acc1ce747f4e6a088c2dbc967d Author: Alan Somers <asomers@FreeBSD.org> AuthorDate: 2023-11-10 17:28:32 +0000 Commit: Alan Somers <asomers@FreeBSD.org> CommitDate: 2023-11-15 23:12:50 +0000 lib/libc/rpc: switch the per-fd structs in clnt_{dg,vc}.c to RB Trees This saves oodles of memory, especially when "ulimit -n" is large. It also prevents a buffer overflow if getrlimit should fail. Also replace per-fd condvars with mutexes to simplify the code. PR: 274968 MFC after: 2 weeks Sponsored by: Axcient Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D42597 --- include/rpc/rpc_com.h | 1 - lib/libc/rpc/clnt_dg.c | 153 ++++++++++++++++++++--------------------- lib/libc/rpc/clnt_vc.c | 165 +++++++++++++++++++++++---------------------- lib/libc/rpc/rpc_com.h | 1 - lib/libc/rpc/rpc_generic.c | 23 ------- sys/rpc/rpc_com.h | 1 - 6 files changed, 162 insertions(+), 182 deletions(-) diff --git a/include/rpc/rpc_com.h b/include/rpc/rpc_com.h index a98e3f73bac8..a0a8c8872efa 100644 --- a/include/rpc/rpc_com.h +++ b/include/rpc/rpc_com.h @@ -58,7 +58,6 @@ __BEGIN_DECLS extern u_int __rpc_get_a_size(int); -extern int __rpc_dtbsize(void); extern int _rpc_dtablesize(void); extern struct netconfig * __rpcgettp(int); extern int __rpc_get_default_domain(char **); diff --git a/lib/libc/rpc/clnt_dg.c b/lib/libc/rpc/clnt_dg.c index 7f741f932c42..c2a45b9d037f 100644 --- a/lib/libc/rpc/clnt_dg.c +++ b/lib/libc/rpc/clnt_dg.c @@ -48,13 +48,17 @@ static char sccsid[] = "@(#)clnt_dg.c 1.19 89/03/16 Copyr 1988 Sun Micro"; #include <sys/time.h> #include <sys/socket.h> #include <sys/ioctl.h> +#include <sys/tree.h> #include <arpa/inet.h> #include <rpc/rpc.h> #include <rpc/rpcsec_gss.h> +#include <assert.h> #include <errno.h> +#include <pthread.h> #include <stdlib.h> #include <string.h> #include <signal.h> +#include <stdbool.h> #include <unistd.h> #include <err.h> #include "un-namespace.h" @@ -89,26 +93,60 @@ static void clnt_dg_destroy(CLIENT *); * This machinery implements per-fd locks for MT-safety. It is not * sufficient to do per-CLIENT handle locks for MT-safety because a * user may create more than one CLIENT handle with the same fd behind - * it. Therefore, we allocate an array of flags and condition variables - * (dg_fd) protected by the clnt_fd_lock mutex. dg_fd[fd].lock == 1 => a - * call is active on some CLIENT handle created for that fd. The current - * implementation holds locks across the entire RPC and reply, including - * retransmissions. Yes, this is silly, and as soon as this code is - * proven to work, this should be the first thing fixed. One step at a - * time. + * it. Therefore, we allocate an associative array of flags and condition + * variables (dg_fd). The flags and the array are protected by the + * clnt_fd_lock mutex. dg_fd[fd].lock == 1 => a call is active on some + * CLIENT handle created for that fd. The current implementation holds + * locks across the entire RPC and reply, including retransmissions. Yes, + * this is silly, and as soon as this code is proven to work, this should + * be the first thing fixed. One step at a time. */ -static struct { - int lock; - cond_t cv; -} *dg_fd; +struct dg_fd { + RB_ENTRY(dg_fd) dg_link; + int fd; + mutex_t mtx; +}; +static inline int +cmp_dg_fd(struct dg_fd *a, struct dg_fd *b) +{ + if (a->fd > b->fd) { + return (1); + } else if (a->fd < b->fd) { + return (-1); + } else { + return (0); + } +} +RB_HEAD(dg_fd_list, dg_fd); +RB_PROTOTYPE(dg_fd_list, dg_fd, dg_link, cmp_dg_fd); +RB_GENERATE(dg_fd_list, dg_fd, dg_link, cmp_dg_fd); +struct dg_fd_list dg_fd_head = RB_INITIALIZER(&dg_fd_head); + +/* + * Find the lock structure for the given file descriptor, or initialize it if + * it does not already exist. The clnt_fd_lock mutex must be held. + */ +static struct dg_fd * +dg_fd_find(int fd) +{ + struct dg_fd key, *elem; + + key.fd = fd; + elem = RB_FIND(dg_fd_list, &dg_fd_head, &key); + if (elem == NULL) { + elem = calloc(1, sizeof(*elem)); + elem->fd = fd; + mutex_init(&elem->mtx, NULL); + RB_INSERT(dg_fd_list, &dg_fd_head, elem); + } + return (elem); +} + static void -release_fd_lock(int fd, sigset_t mask) +release_fd_lock(struct dg_fd *elem, sigset_t mask) { - mutex_lock(&clnt_fd_lock); - dg_fd[fd].lock = 0; - mutex_unlock(&clnt_fd_lock); + mutex_unlock(&elem->mtx); thr_sigsetmask(SIG_SETMASK, &mask, NULL); - cond_signal(&dg_fd[fd].cv); } static const char mem_err_clnt_dg[] = "clnt_dg_create: out of memory"; @@ -171,35 +209,9 @@ clnt_dg_create(int fd, const struct netbuf *svcaddr, rpcprog_t program, struct cu_data *cu = NULL; /* private data */ struct timeval now; struct rpc_msg call_msg; - sigset_t mask; - sigset_t newmask; struct __rpc_sockinfo si; int one = 1; - sigfillset(&newmask); - thr_sigsetmask(SIG_SETMASK, &newmask, &mask); - mutex_lock(&clnt_fd_lock); - if (dg_fd == NULL) { - size_t allocsz; - int i; - int dtbsize = __rpc_dtbsize(); - - allocsz = dtbsize * sizeof (dg_fd[0]); - dg_fd = mem_alloc(allocsz); - if (dg_fd == NULL) { - mutex_unlock(&clnt_fd_lock); - thr_sigsetmask(SIG_SETMASK, &(mask), NULL); - goto err1; - } - memset(dg_fd, '\0', allocsz); - - for (i = 0; i < dtbsize; i++) - cond_init(&dg_fd[i].cv, 0, (void *) 0); - } - - mutex_unlock(&clnt_fd_lock); - thr_sigsetmask(SIG_SETMASK, &(mask), NULL); - if (svcaddr == NULL) { rpc_createerr.cf_stat = RPC_UNKNOWNADDR; return (NULL); @@ -320,25 +332,21 @@ clnt_dg_call(CLIENT *cl, rpcproc_t proc, xdrproc_t xargs, void *argsp, struct timespec ts; struct kevent kv; struct sockaddr *sa; + struct dg_fd *elem; sigset_t mask; sigset_t newmask; socklen_t salen; ssize_t recvlen = 0; - int kin_len, n, rpc_lock_value; + int kin_len, n; u_int32_t xid; outlen = 0; sigfillset(&newmask); thr_sigsetmask(SIG_SETMASK, &newmask, &mask); mutex_lock(&clnt_fd_lock); - while (dg_fd[cu->cu_fd].lock) - cond_wait(&dg_fd[cu->cu_fd].cv, &clnt_fd_lock); - if (__isthreaded) - rpc_lock_value = 1; - else - rpc_lock_value = 0; - dg_fd[cu->cu_fd].lock = rpc_lock_value; + elem = dg_fd_find(cu->cu_fd); mutex_unlock(&clnt_fd_lock); + mutex_lock(&elem->mtx); if (cu->cu_total.tv_usec == -1) { timeout = utimeout; /* use supplied timeout */ } else { @@ -592,7 +600,7 @@ out: if (cu->cu_kq >= 0) _close(cu->cu_kq); cu->cu_kq = -1; - release_fd_lock(cu->cu_fd, mask); + release_fd_lock(elem, mask); return (cu->cu_error.re_status); } @@ -608,6 +616,7 @@ static bool_t clnt_dg_freeres(CLIENT *cl, xdrproc_t xdr_res, void *res_ptr) { struct cu_data *cu = (struct cu_data *)cl->cl_private; + struct dg_fd *elem; XDR *xdrs = &(cu->cu_outxdrs); bool_t dummy; sigset_t mask; @@ -616,13 +625,12 @@ clnt_dg_freeres(CLIENT *cl, xdrproc_t xdr_res, void *res_ptr) sigfillset(&newmask); thr_sigsetmask(SIG_SETMASK, &newmask, &mask); mutex_lock(&clnt_fd_lock); - while (dg_fd[cu->cu_fd].lock) - cond_wait(&dg_fd[cu->cu_fd].cv, &clnt_fd_lock); + elem = dg_fd_find(cu->cu_fd); + mutex_lock(&elem->mtx); xdrs->x_op = XDR_FREE; dummy = (*xdr_res)(xdrs, res_ptr); mutex_unlock(&clnt_fd_lock); - thr_sigsetmask(SIG_SETMASK, &mask, NULL); - cond_signal(&dg_fd[cu->cu_fd].cv); + release_fd_lock(elem, mask); return (dummy); } @@ -637,41 +645,36 @@ clnt_dg_control(CLIENT *cl, u_int request, void *info) { struct cu_data *cu = (struct cu_data *)cl->cl_private; struct netbuf *addr; + struct dg_fd *elem; sigset_t mask; sigset_t newmask; - int rpc_lock_value; sigfillset(&newmask); thr_sigsetmask(SIG_SETMASK, &newmask, &mask); mutex_lock(&clnt_fd_lock); - while (dg_fd[cu->cu_fd].lock) - cond_wait(&dg_fd[cu->cu_fd].cv, &clnt_fd_lock); - if (__isthreaded) - rpc_lock_value = 1; - else - rpc_lock_value = 0; - dg_fd[cu->cu_fd].lock = rpc_lock_value; + elem = dg_fd_find(cu->cu_fd); mutex_unlock(&clnt_fd_lock); + mutex_lock(&elem->mtx); switch (request) { case CLSET_FD_CLOSE: cu->cu_closeit = TRUE; - release_fd_lock(cu->cu_fd, mask); + release_fd_lock(elem, mask); return (TRUE); case CLSET_FD_NCLOSE: cu->cu_closeit = FALSE; - release_fd_lock(cu->cu_fd, mask); + release_fd_lock(elem, mask); return (TRUE); } /* for other requests which use info */ if (info == NULL) { - release_fd_lock(cu->cu_fd, mask); + release_fd_lock(elem, mask); return (FALSE); } switch (request) { case CLSET_TIMEOUT: if (time_not_ok((struct timeval *)info)) { - release_fd_lock(cu->cu_fd, mask); + release_fd_lock(elem, mask); return (FALSE); } cu->cu_total = *(struct timeval *)info; @@ -685,7 +688,7 @@ clnt_dg_control(CLIENT *cl, u_int request, void *info) break; case CLSET_RETRY_TIMEOUT: if (time_not_ok((struct timeval *)info)) { - release_fd_lock(cu->cu_fd, mask); + release_fd_lock(elem, mask); return (FALSE); } cu->cu_wait = *(struct timeval *)info; @@ -705,7 +708,7 @@ clnt_dg_control(CLIENT *cl, u_int request, void *info) case CLSET_SVC_ADDR: /* set to new address */ addr = (struct netbuf *)info; if (addr->len < sizeof cu->cu_raddr) { - release_fd_lock(cu->cu_fd, mask); + release_fd_lock(elem, mask); return (FALSE); } (void) memcpy(&cu->cu_raddr, addr->buf, addr->len); @@ -768,10 +771,10 @@ clnt_dg_control(CLIENT *cl, u_int request, void *info) cu->cu_connect = *(int *)info; break; default: - release_fd_lock(cu->cu_fd, mask); + release_fd_lock(elem, mask); return (FALSE); } - release_fd_lock(cu->cu_fd, mask); + release_fd_lock(elem, mask); return (TRUE); } @@ -779,6 +782,7 @@ static void clnt_dg_destroy(CLIENT *cl) { struct cu_data *cu = (struct cu_data *)cl->cl_private; + struct dg_fd *elem; int cu_fd = cu->cu_fd; sigset_t mask; sigset_t newmask; @@ -786,8 +790,8 @@ clnt_dg_destroy(CLIENT *cl) sigfillset(&newmask); thr_sigsetmask(SIG_SETMASK, &newmask, &mask); mutex_lock(&clnt_fd_lock); - while (dg_fd[cu_fd].lock) - cond_wait(&dg_fd[cu_fd].cv, &clnt_fd_lock); + elem = dg_fd_find(cu_fd); + mutex_lock(&elem->mtx); if (cu->cu_closeit) (void)_close(cu_fd); if (cu->cu_kq >= 0) @@ -800,8 +804,7 @@ clnt_dg_destroy(CLIENT *cl) mem_free(cl->cl_tp, strlen(cl->cl_tp) +1); mem_free(cl, sizeof (CLIENT)); mutex_unlock(&clnt_fd_lock); - thr_sigsetmask(SIG_SETMASK, &mask, NULL); - cond_signal(&dg_fd[cu_fd].cv); + release_fd_lock(elem, mask); } static struct clnt_ops * diff --git a/lib/libc/rpc/clnt_vc.c b/lib/libc/rpc/clnt_vc.c index 8b0fe0dd7793..7a155d0f918b 100644 --- a/lib/libc/rpc/clnt_vc.c +++ b/lib/libc/rpc/clnt_vc.c @@ -60,6 +60,7 @@ static char sccsid3[] = "@(#)clnt_vc.c 1.19 89/03/16 Copyr 1988 Sun Micro"; #include <sys/poll.h> #include <sys/syslog.h> #include <sys/socket.h> +#include <sys/tree.h> #include <sys/un.h> #include <sys/uio.h> @@ -68,7 +69,9 @@ static char sccsid3[] = "@(#)clnt_vc.c 1.19 89/03/16 Copyr 1988 Sun Micro"; #include <err.h> #include <errno.h> #include <netdb.h> +#include <pthread.h> #include <stdio.h> +#include <stdbool.h> #include <stdlib.h> #include <string.h> #include <unistd.h> @@ -120,25 +123,60 @@ struct ct_data { * This machinery implements per-fd locks for MT-safety. It is not * sufficient to do per-CLIENT handle locks for MT-safety because a * user may create more than one CLIENT handle with the same fd behind - * it. Therefore, we allocate an array of flags and condition variables - * (vc_fd) protected by the clnt_fd_lock mutex. vc_fd_lock[fd] == 1 => a - * call is active on some CLIENT handle created for that fd. The current - * implementation holds locks across the entire RPC and reply. Yes, this - * is silly, and as soon as this code is proven to work, this should be - * the first thing fixed. One step at a time. + * it. Therefore, we allocate an associative array of flags and condition + * variables (vc_fd). The flags and the array are protected by the + * clnt_fd_lock mutex. vc_fd_lock[fd] == 1 => a call is active on some + * CLIENT handle created for that fd. The current implementation holds + * locks across the entire RPC and reply. Yes, this is silly, and as soon + * as this code is proven to work, this should be the first thing fixed. + * One step at a time. */ -static struct { - int lock; - cond_t cv; -} *vc_fd; +struct vc_fd { + RB_ENTRY(vc_fd) vc_link; + int fd; + mutex_t mtx; +}; +static inline int +cmp_vc_fd(struct vc_fd *a, struct vc_fd *b) +{ + if (a->fd > b->fd) { + return (1); + } else if (a->fd < b->fd) { + return (-1); + } else { + return (0); + } +} +RB_HEAD(vc_fd_list, vc_fd); +RB_PROTOTYPE(vc_fd_list, vc_fd, vc_link, cmp_vc_fd); +RB_GENERATE(vc_fd_list, vc_fd, vc_link, cmp_vc_fd); +struct vc_fd_list vc_fd_head = RB_INITIALIZER(&vc_fd_head); + +/* + * Find the lock structure for the given file descriptor, or initialize it if + * it does not already exist. The clnt_fd_lock mutex must be held. + */ +static struct vc_fd * +vc_fd_find(int fd) +{ + struct vc_fd key, *elem; + + key.fd = fd; + elem = RB_FIND(vc_fd_list, &vc_fd_head, &key); + if (elem == NULL) { + elem = calloc(1, sizeof(*elem)); + elem->fd = fd; + mutex_init(&elem->mtx, NULL); + RB_INSERT(vc_fd_list, &vc_fd_head, elem); + } + return (elem); +} + static void -release_fd_lock(int fd, sigset_t mask) +release_fd_lock(struct vc_fd *elem, sigset_t mask) { - mutex_lock(&clnt_fd_lock); - vc_fd[fd].lock = 0; - mutex_unlock(&clnt_fd_lock); - thr_sigsetmask(SIG_SETMASK, &mask, (sigset_t *) NULL); - cond_signal(&vc_fd[fd].cv); + mutex_unlock(&elem->mtx); + thr_sigsetmask(SIG_SETMASK, &mask, NULL); } static const char clnt_vc_errstr[] = "%s : %s"; @@ -172,8 +210,6 @@ clnt_vc_create(int fd, const struct netbuf *raddr, const rpcprog_t prog, struct timeval now; struct rpc_msg call_msg; static u_int32_t disrupt; - sigset_t mask; - sigset_t newmask; struct sockaddr_storage ss; socklen_t slen; struct __rpc_sockinfo si; @@ -191,26 +227,6 @@ clnt_vc_create(int fd, const struct netbuf *raddr, const rpcprog_t prog, goto err; } ct->ct_addr.buf = NULL; - sigfillset(&newmask); - thr_sigsetmask(SIG_SETMASK, &newmask, &mask); - mutex_lock(&clnt_fd_lock); - if (vc_fd == NULL) { - size_t allocsz; - int i; - int dtbsize = __rpc_dtbsize(); - - allocsz = dtbsize * sizeof (vc_fd[0]); - vc_fd = mem_alloc(allocsz); - if (vc_fd == NULL) { - mutex_unlock(&clnt_fd_lock); - thr_sigsetmask(SIG_SETMASK, &(mask), NULL); - goto err; - } - memset(vc_fd, '\0', allocsz); - - for (i = 0; i < dtbsize; i++) - cond_init(&vc_fd[i].cv, 0, (void *) 0); - } /* * XXX - fvdl connecting while holding a mutex? @@ -221,19 +237,16 @@ clnt_vc_create(int fd, const struct netbuf *raddr, const rpcprog_t prog, rpc_createerr.cf_stat = RPC_SYSTEMERROR; rpc_createerr.cf_error.re_errno = errno; mutex_unlock(&clnt_fd_lock); - thr_sigsetmask(SIG_SETMASK, &(mask), NULL); goto err; } if (_connect(fd, (struct sockaddr *)raddr->buf, raddr->len) < 0){ rpc_createerr.cf_stat = RPC_SYSTEMERROR; rpc_createerr.cf_error.re_errno = errno; mutex_unlock(&clnt_fd_lock); - thr_sigsetmask(SIG_SETMASK, &(mask), NULL); goto err; } } mutex_unlock(&clnt_fd_lock); - thr_sigsetmask(SIG_SETMASK, &(mask), NULL); if (!__rpc_fd2sockinfo(fd, &si)) goto err; @@ -308,12 +321,12 @@ clnt_vc_call(CLIENT *cl, rpcproc_t proc, xdrproc_t xdr_args, void *args_ptr, struct ct_data *ct = (struct ct_data *) cl->cl_private; XDR *xdrs = &(ct->ct_xdrs); struct rpc_msg reply_msg; + struct vc_fd *elem; u_int32_t x_id; u_int32_t *msg_x_id = &ct->ct_u.ct_mcalli; /* yuk */ bool_t shipnow; int refreshes = 2; sigset_t mask, newmask; - int rpc_lock_value; bool_t reply_stat; assert(cl != NULL); @@ -321,14 +334,9 @@ clnt_vc_call(CLIENT *cl, rpcproc_t proc, xdrproc_t xdr_args, void *args_ptr, sigfillset(&newmask); thr_sigsetmask(SIG_SETMASK, &newmask, &mask); mutex_lock(&clnt_fd_lock); - while (vc_fd[ct->ct_fd].lock) - cond_wait(&vc_fd[ct->ct_fd].cv, &clnt_fd_lock); - if (__isthreaded) - rpc_lock_value = 1; - else - rpc_lock_value = 0; - vc_fd[ct->ct_fd].lock = rpc_lock_value; + elem = vc_fd_find(ct->ct_fd); mutex_unlock(&clnt_fd_lock); + mutex_lock(&elem->mtx); if (!ct->ct_waitset) { /* If time is not within limits, we ignore it. */ if (time_not_ok(&timeout) == FALSE) @@ -352,7 +360,7 @@ call_again: if (ct->ct_error.re_status == RPC_SUCCESS) ct->ct_error.re_status = RPC_CANTENCODEARGS; (void)xdrrec_endofrecord(xdrs, TRUE); - release_fd_lock(ct->ct_fd, mask); + release_fd_lock(elem, mask); return (ct->ct_error.re_status); } } else { @@ -363,23 +371,23 @@ call_again: if (ct->ct_error.re_status == RPC_SUCCESS) ct->ct_error.re_status = RPC_CANTENCODEARGS; (void)xdrrec_endofrecord(xdrs, TRUE); - release_fd_lock(ct->ct_fd, mask); + release_fd_lock(elem, mask); return (ct->ct_error.re_status); } } if (! xdrrec_endofrecord(xdrs, shipnow)) { - release_fd_lock(ct->ct_fd, mask); + release_fd_lock(elem, mask); return (ct->ct_error.re_status = RPC_CANTSEND); } if (! shipnow) { - release_fd_lock(ct->ct_fd, mask); + release_fd_lock(elem, mask); return (RPC_SUCCESS); } /* * Hack to provide rpc-based message passing */ if (timeout.tv_sec == 0 && timeout.tv_usec == 0) { - release_fd_lock(ct->ct_fd, mask); + release_fd_lock(elem, mask); return(ct->ct_error.re_status = RPC_TIMEDOUT); } @@ -393,14 +401,14 @@ call_again: reply_msg.acpted_rply.ar_results.where = NULL; reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void; if (! xdrrec_skiprecord(xdrs)) { - release_fd_lock(ct->ct_fd, mask); + release_fd_lock(elem, mask); return (ct->ct_error.re_status); } /* now decode and validate the response header */ if (! xdr_replymsg(xdrs, &reply_msg)) { if (ct->ct_error.re_status == RPC_SUCCESS) continue; - release_fd_lock(ct->ct_fd, mask); + release_fd_lock(elem, mask); return (ct->ct_error.re_status); } if (reply_msg.rm_xid == x_id) @@ -441,7 +449,7 @@ call_again: if (refreshes-- && AUTH_REFRESH(cl->cl_auth, &reply_msg)) goto call_again; } /* end of unsuccessful completion */ - release_fd_lock(ct->ct_fd, mask); + release_fd_lock(elem, mask); return (ct->ct_error.re_status); } @@ -461,6 +469,7 @@ static bool_t clnt_vc_freeres(CLIENT *cl, xdrproc_t xdr_res, void *res_ptr) { struct ct_data *ct; + struct vc_fd *elem; XDR *xdrs; bool_t dummy; sigset_t mask; @@ -474,14 +483,13 @@ clnt_vc_freeres(CLIENT *cl, xdrproc_t xdr_res, void *res_ptr) sigfillset(&newmask); thr_sigsetmask(SIG_SETMASK, &newmask, &mask); mutex_lock(&clnt_fd_lock); - while (vc_fd[ct->ct_fd].lock) - cond_wait(&vc_fd[ct->ct_fd].cv, &clnt_fd_lock); + elem = vc_fd_find(ct->ct_fd); + mutex_lock(&elem->mtx); xdrs->x_op = XDR_FREE; dummy = (*xdr_res)(xdrs, res_ptr); - mutex_unlock(&clnt_fd_lock); - thr_sigsetmask(SIG_SETMASK, &(mask), NULL); - cond_signal(&vc_fd[ct->ct_fd].cv); + mutex_unlock(&clnt_fd_lock); + release_fd_lock(elem, mask); return dummy; } @@ -509,10 +517,10 @@ static bool_t clnt_vc_control(CLIENT *cl, u_int request, void *info) { struct ct_data *ct; + struct vc_fd *elem; void *infop = info; sigset_t mask; sigset_t newmask; - int rpc_lock_value; assert(cl != NULL); @@ -521,23 +529,18 @@ clnt_vc_control(CLIENT *cl, u_int request, void *info) sigfillset(&newmask); thr_sigsetmask(SIG_SETMASK, &newmask, &mask); mutex_lock(&clnt_fd_lock); - while (vc_fd[ct->ct_fd].lock) - cond_wait(&vc_fd[ct->ct_fd].cv, &clnt_fd_lock); - if (__isthreaded) - rpc_lock_value = 1; - else - rpc_lock_value = 0; - vc_fd[ct->ct_fd].lock = rpc_lock_value; + elem = vc_fd_find(ct->ct_fd); mutex_unlock(&clnt_fd_lock); + mutex_lock(&elem->mtx); switch (request) { case CLSET_FD_CLOSE: ct->ct_closeit = TRUE; - release_fd_lock(ct->ct_fd, mask); + release_fd_lock(elem, mask); return (TRUE); case CLSET_FD_NCLOSE: ct->ct_closeit = FALSE; - release_fd_lock(ct->ct_fd, mask); + release_fd_lock(elem, mask); return (TRUE); default: break; @@ -545,13 +548,13 @@ clnt_vc_control(CLIENT *cl, u_int request, void *info) /* for other requests which use info */ if (info == NULL) { - release_fd_lock(ct->ct_fd, mask); + release_fd_lock(elem, mask); return (FALSE); } switch (request) { case CLSET_TIMEOUT: if (time_not_ok((struct timeval *)info)) { - release_fd_lock(ct->ct_fd, mask); + release_fd_lock(elem, mask); return (FALSE); } ct->ct_wait = *(struct timeval *)infop; @@ -571,7 +574,7 @@ clnt_vc_control(CLIENT *cl, u_int request, void *info) *(struct netbuf *)info = ct->ct_addr; break; case CLSET_SVC_ADDR: /* set to new address */ - release_fd_lock(ct->ct_fd, mask); + release_fd_lock(elem, mask); return (FALSE); case CLGET_XID: /* @@ -615,10 +618,10 @@ clnt_vc_control(CLIENT *cl, u_int request, void *info) break; default: - release_fd_lock(ct->ct_fd, mask); + release_fd_lock(elem, mask); return (FALSE); } - release_fd_lock(ct->ct_fd, mask); + release_fd_lock(elem, mask); return (TRUE); } @@ -627,6 +630,7 @@ static void clnt_vc_destroy(CLIENT *cl) { struct ct_data *ct = (struct ct_data *) cl->cl_private; + struct vc_fd *elem; int ct_fd = ct->ct_fd; sigset_t mask; sigset_t newmask; @@ -638,8 +642,8 @@ clnt_vc_destroy(CLIENT *cl) sigfillset(&newmask); thr_sigsetmask(SIG_SETMASK, &newmask, &mask); mutex_lock(&clnt_fd_lock); - while (vc_fd[ct_fd].lock) - cond_wait(&vc_fd[ct_fd].cv, &clnt_fd_lock); + elem = vc_fd_find(ct_fd); + mutex_lock(&elem->mtx); if (ct->ct_closeit && ct->ct_fd != -1) { (void)_close(ct->ct_fd); } @@ -652,8 +656,7 @@ clnt_vc_destroy(CLIENT *cl) mem_free(cl->cl_tp, strlen(cl->cl_tp) +1); mem_free(cl, sizeof(CLIENT)); mutex_unlock(&clnt_fd_lock); - thr_sigsetmask(SIG_SETMASK, &(mask), NULL); - cond_signal(&vc_fd[ct_fd].cv); + release_fd_lock(elem, mask); } /* diff --git a/lib/libc/rpc/rpc_com.h b/lib/libc/rpc/rpc_com.h index ce386e540f07..40fd81499165 100644 --- a/lib/libc/rpc/rpc_com.h +++ b/lib/libc/rpc/rpc_com.h @@ -59,7 +59,6 @@ __BEGIN_DECLS extern u_int __rpc_get_a_size(int); -extern int __rpc_dtbsize(void); extern struct netconfig * __rpcgettp(int); extern int __rpc_get_default_domain(char **); diff --git a/lib/libc/rpc/rpc_generic.c b/lib/libc/rpc/rpc_generic.c index 99e3c1263c18..5195c0dc2ac0 100644 --- a/lib/libc/rpc/rpc_generic.c +++ b/lib/libc/rpc/rpc_generic.c @@ -104,29 +104,6 @@ static char *strlocase(char *); #endif static int getnettype(const char *); -/* - * Cache the result of getrlimit(), so we don't have to do an - * expensive call every time. - */ -int -__rpc_dtbsize(void) -{ - static int tbsize; - struct rlimit rl; - - if (tbsize) { - return (tbsize); - } - if (getrlimit(RLIMIT_NOFILE, &rl) == 0) { - return (tbsize = (int)rl.rlim_max); - } - /* - * Something wrong. I'll try to save face by returning a - * pessimistic number. - */ - return (32); -} - /* * Find the appropriate buffer size diff --git a/sys/rpc/rpc_com.h b/sys/rpc/rpc_com.h index 0206971dde2a..facd36c26a39 100644 --- a/sys/rpc/rpc_com.h +++ b/sys/rpc/rpc_com.h @@ -70,7 +70,6 @@ __BEGIN_DECLS #ifndef _KERNEL extern u_int __rpc_get_a_size(int); -extern int __rpc_dtbsize(void); extern struct netconfig * __rpcgettp(int); extern int __rpc_get_default_domain(char **);