diff options
Diffstat (limited to 'drivers/staging/lustre/lnet/lnet/config.c')
| -rw-r--r-- | drivers/staging/lustre/lnet/lnet/config.c | 1264 |
1 files changed, 1264 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lnet/lnet/config.c b/drivers/staging/lustre/lnet/lnet/config.c new file mode 100644 index 000000000000..28711e6e8b03 --- /dev/null +++ b/drivers/staging/lustre/lnet/lnet/config.c @@ -0,0 +1,1264 @@ +/* + * GPL HEADER START + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 only, + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License version 2 for more details (a copy is included + * in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU General Public License + * version 2 along with this program; If not, see + * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + * GPL HEADER END + */ +/* + * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + * + * Copyright (c) 2012, Intel Corporation. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + */ + +#define DEBUG_SUBSYSTEM S_LNET +#include <linux/lnet/lib-lnet.h> + +typedef struct { /* tmp struct for parsing routes */ + struct list_head ltb_list; /* stash on lists */ + int ltb_size; /* allocated size */ + char ltb_text[0]; /* text buffer */ +} lnet_text_buf_t; + +static int lnet_tbnob = 0; /* track text buf allocation */ +#define LNET_MAX_TEXTBUF_NOB (64<<10) /* bound allocation */ +#define LNET_SINGLE_TEXTBUF_NOB (4<<10) + +void +lnet_syntax(char *name, char *str, int offset, int width) +{ + static char dots[LNET_SINGLE_TEXTBUF_NOB]; + static char dashes[LNET_SINGLE_TEXTBUF_NOB]; + + memset(dots, '.', sizeof(dots)); + dots[sizeof(dots)-1] = 0; + memset(dashes, '-', sizeof(dashes)); + dashes[sizeof(dashes)-1] = 0; + + LCONSOLE_ERROR_MSG(0x10f, "Error parsing '%s=\"%s\"'\n", name, str); + LCONSOLE_ERROR_MSG(0x110, "here...........%.*s..%.*s|%.*s|\n", + (int)strlen(name), dots, offset, dots, + (width < 1) ? 0 : width - 1, dashes); +} + +int +lnet_issep (char c) +{ + switch (c) { + case '\n': + case '\r': + case ';': + return 1; + default: + return 0; + } +} + +int +lnet_net_unique(__u32 net, struct list_head *nilist) +{ + struct list_head *tmp; + lnet_ni_t *ni; + + list_for_each (tmp, nilist) { + ni = list_entry(tmp, lnet_ni_t, ni_list); + + if (LNET_NIDNET(ni->ni_nid) == net) + return 0; + } + + return 1; +} + +void +lnet_ni_free(struct lnet_ni *ni) +{ + if (ni->ni_refs != NULL) + cfs_percpt_free(ni->ni_refs); + + if (ni->ni_tx_queues != NULL) + cfs_percpt_free(ni->ni_tx_queues); + + if (ni->ni_cpts != NULL) + cfs_expr_list_values_free(ni->ni_cpts, ni->ni_ncpts); + + LIBCFS_FREE(ni, sizeof(*ni)); +} + +lnet_ni_t * +lnet_ni_alloc(__u32 net, struct cfs_expr_list *el, struct list_head *nilist) +{ + struct lnet_tx_queue *tq; + struct lnet_ni *ni; + int rc; + int i; + + if (!lnet_net_unique(net, nilist)) { + LCONSOLE_ERROR_MSG(0x111, "Duplicate network specified: %s\n", + libcfs_net2str(net)); + return NULL; + } + + LIBCFS_ALLOC(ni, sizeof(*ni)); + if (ni == NULL) { + CERROR("Out of memory creating network %s\n", + libcfs_net2str(net)); + return NULL; + } + + spin_lock_init(&ni->ni_lock); + INIT_LIST_HEAD(&ni->ni_cptlist); + ni->ni_refs = cfs_percpt_alloc(lnet_cpt_table(), + sizeof(*ni->ni_refs[0])); + if (ni->ni_refs == NULL) + goto failed; + + ni->ni_tx_queues = cfs_percpt_alloc(lnet_cpt_table(), + sizeof(*ni->ni_tx_queues[0])); + if (ni->ni_tx_queues == NULL) + goto failed; + + cfs_percpt_for_each(tq, i, ni->ni_tx_queues) + INIT_LIST_HEAD(&tq->tq_delayed); + + if (el == NULL) { + ni->ni_cpts = NULL; + ni->ni_ncpts = LNET_CPT_NUMBER; + } else { + rc = cfs_expr_list_values(el, LNET_CPT_NUMBER, &ni->ni_cpts); + if (rc <= 0) { + CERROR("Failed to set CPTs for NI %s: %d\n", + libcfs_net2str(net), rc); + goto failed; + } + + LASSERT(rc <= LNET_CPT_NUMBER); + if (rc == LNET_CPT_NUMBER) { + LIBCFS_FREE(ni->ni_cpts, rc * sizeof(ni->ni_cpts[0])); + ni->ni_cpts = NULL; + } + + ni->ni_ncpts = rc; + } + + /* LND will fill in the address part of the NID */ + ni->ni_nid = LNET_MKNID(net, 0); + ni->ni_last_alive = cfs_time_current_sec(); + list_add_tail(&ni->ni_list, nilist); + return ni; + failed: + lnet_ni_free(ni); + return NULL; +} + +int +lnet_parse_networks(struct list_head *nilist, char *networks) +{ + struct cfs_expr_list *el = NULL; + int tokensize = strlen(networks) + 1; + char *tokens; + char *str; + char *tmp; + struct lnet_ni *ni; + __u32 net; + int nnets = 0; + + if (strlen(networks) > LNET_SINGLE_TEXTBUF_NOB) { + /* _WAY_ conservative */ + LCONSOLE_ERROR_MSG(0x112, "Can't parse networks: string too " + "long\n"); + return -EINVAL; + } + + LIBCFS_ALLOC(tokens, tokensize); + if (tokens == NULL) { + CERROR("Can't allocate net tokens\n"); + return -ENOMEM; + } + + the_lnet.ln_network_tokens = tokens; + the_lnet.ln_network_tokens_nob = tokensize; + memcpy (tokens, networks, tokensize); + str = tmp = tokens; + + /* Add in the loopback network */ + ni = lnet_ni_alloc(LNET_MKNET(LOLND, 0), NULL, nilist); + if (ni == NULL) + goto failed; + + while (str != NULL && *str != 0) { + char *comma = strchr(str, ','); + char *bracket = strchr(str, '('); + char *square = strchr(str, '['); + char *iface; + int niface; + int rc; + + /* NB we don't check interface conflicts here; it's the LNDs + * responsibility (if it cares at all) */ + + if (square != NULL && (comma == NULL || square < comma)) { + /* i.e: o2ib0(ib0)[1,2], number between square + * brackets are CPTs this NI needs to be bond */ + if (bracket != NULL && bracket > square) { + tmp = square; + goto failed_syntax; + } + + tmp = strchr(square, ']'); + if (tmp == NULL) { + tmp = square; + goto failed_syntax; + } + + rc = cfs_expr_list_parse(square, tmp - square + 1, + 0, LNET_CPT_NUMBER - 1, &el); + if (rc != 0) { + tmp = square; + goto failed_syntax; + } + + while (square <= tmp) + *square++ = ' '; + } + + if (bracket == NULL || + (comma != NULL && comma < bracket)) { + + /* no interface list specified */ + + if (comma != NULL) + *comma++ = 0; + net = libcfs_str2net(cfs_trimwhite(str)); + + if (net == LNET_NIDNET(LNET_NID_ANY)) { + LCONSOLE_ERROR_MSG(0x113, "Unrecognised network" + " type\n"); + tmp = str; + goto failed_syntax; + } + + if (LNET_NETTYP(net) != LOLND && /* LO is implicit */ + lnet_ni_alloc(net, el, nilist) == NULL) + goto failed; + + if (el != NULL) { + cfs_expr_list_free(el); + el = NULL; + } + + str = comma; + continue; + } + + *bracket = 0; + net = libcfs_str2net(cfs_trimwhite(str)); + if (net == LNET_NIDNET(LNET_NID_ANY)) { + tmp = str; + goto failed_syntax; + } + + nnets++; + ni = lnet_ni_alloc(net, el, nilist); + if (ni == NULL) + goto failed; + + if (el != NULL) { + cfs_expr_list_free(el); + el = NULL; + } + + niface = 0; + iface = bracket + 1; + + bracket = strchr(iface, ')'); + if (bracket == NULL) { + tmp = iface; + goto failed_syntax; + } + + *bracket = 0; + do { + comma = strchr(iface, ','); + if (comma != NULL) + *comma++ = 0; + + iface = cfs_trimwhite(iface); + if (*iface == 0) { + tmp = iface; + goto failed_syntax; + } + + if (niface == LNET_MAX_INTERFACES) { + LCONSOLE_ERROR_MSG(0x115, "Too many interfaces " + "for net %s\n", + libcfs_net2str(net)); + goto failed; + } + + ni->ni_interfaces[niface++] = iface; + iface = comma; + } while (iface != NULL); + + str = bracket + 1; + comma = strchr(bracket + 1, ','); + if (comma != NULL) { + *comma = 0; + str = cfs_trimwhite(str); + if (*str != 0) { + tmp = str; + goto failed_syntax; + } + str = comma + 1; + continue; + } + + str = cfs_trimwhite(str); + if (*str != 0) { + tmp = str; + goto failed_syntax; + } + } + + LASSERT(!list_empty(nilist)); + return 0; + + failed_syntax: + lnet_syntax("networks", networks, (int)(tmp - tokens), strlen(tmp)); + failed: + while (!list_empty(nilist)) { + ni = list_entry(nilist->next, lnet_ni_t, ni_list); + + list_del(&ni->ni_list); + lnet_ni_free(ni); + } + + if (el != NULL) + cfs_expr_list_free(el); + + LIBCFS_FREE(tokens, tokensize); + the_lnet.ln_network_tokens = NULL; + + return -EINVAL; +} + +lnet_text_buf_t * +lnet_new_text_buf (int str_len) +{ + lnet_text_buf_t *ltb; + int nob; + + /* NB allocate space for the terminating 0 */ + nob = offsetof(lnet_text_buf_t, ltb_text[str_len + 1]); + if (nob > LNET_SINGLE_TEXTBUF_NOB) { + /* _way_ conservative for "route net gateway..." */ + CERROR("text buffer too big\n"); + return NULL; + } + + if (lnet_tbnob + nob > LNET_MAX_TEXTBUF_NOB) { + CERROR("Too many text buffers\n"); + return NULL; + } + + LIBCFS_ALLOC(ltb, nob); + if (ltb == NULL) + return NULL; + + ltb->ltb_size = nob; + ltb->ltb_text[0] = 0; + lnet_tbnob += nob; + return ltb; +} + +void +lnet_free_text_buf (lnet_text_buf_t *ltb) +{ + lnet_tbnob -= ltb->ltb_size; + LIBCFS_FREE(ltb, ltb->ltb_size); +} + +void +lnet_free_text_bufs(struct list_head *tbs) +{ + lnet_text_buf_t *ltb; + + while (!list_empty(tbs)) { + ltb = list_entry(tbs->next, lnet_text_buf_t, ltb_list); + + list_del(<b->ltb_list); + lnet_free_text_buf(ltb); + } +} + +void +lnet_print_text_bufs(struct list_head *tbs) +{ + struct list_head *tmp; + lnet_text_buf_t *ltb; + + list_for_each (tmp, tbs) { + ltb = list_entry(tmp, lnet_text_buf_t, ltb_list); + + CDEBUG(D_WARNING, "%s\n", ltb->ltb_text); + } + + CDEBUG(D_WARNING, "%d allocated\n", lnet_tbnob); +} + +int +lnet_str2tbs_sep (struct list_head *tbs, char *str) +{ + struct list_head pending; + char *sep; + int nob; + int i; + lnet_text_buf_t *ltb; + + INIT_LIST_HEAD(&pending); + + /* Split 'str' into separate commands */ + for (;;) { + /* skip leading whitespace */ + while (cfs_iswhite(*str)) + str++; + + /* scan for separator or comment */ + for (sep = str; *sep != 0; sep++) + if (lnet_issep(*sep) || *sep == '#') + break; + + nob = (int)(sep - str); + if (nob > 0) { + ltb = lnet_new_text_buf(nob); + if (ltb == NULL) { + lnet_free_text_bufs(&pending); + return -1; + } + + for (i = 0; i < nob; i++) + if (cfs_iswhite(str[i])) + ltb->ltb_text[i] = ' '; + else + ltb->ltb_text[i] = str[i]; + + ltb->ltb_text[nob] = 0; + + list_add_tail(<b->ltb_list, &pending); + } + + if (*sep == '#') { + /* scan for separator */ + do { + sep++; + } while (*sep != 0 && !lnet_issep(*sep)); + } + + if (*sep == 0) + break; + + str = sep + 1; + } + + list_splice(&pending, tbs->prev); + return 0; +} + +int +lnet_expand1tb (struct list_head *list, + char *str, char *sep1, char *sep2, + char *item, int itemlen) +{ + int len1 = (int)(sep1 - str); + int len2 = strlen(sep2 + 1); + lnet_text_buf_t *ltb; + + LASSERT (*sep1 == '['); + LASSERT (*sep2 == ']'); + + ltb = lnet_new_text_buf(len1 + itemlen + len2); + if (ltb == NULL) + return -ENOMEM; + + memcpy(ltb->ltb_text, str, len1); + memcpy(<b->ltb_text[len1], item, itemlen); + memcpy(<b->ltb_text[len1+itemlen], sep2 + 1, len2); + ltb->ltb_text[len1 + itemlen + len2] = 0; + + list_add_tail(<b->ltb_list, list); + return 0; +} + +int +lnet_str2tbs_expand (struct list_head *tbs, char *str) +{ + char num[16]; + struct list_head pending; + char *sep; + char *sep2; + char *parsed; + char *enditem; + int lo; + int hi; + int stride; + int i; + int nob; + int scanned; + + INIT_LIST_HEAD(&pending); + + sep = strchr(str, '['); + if (sep == NULL) /* nothing to expand */ + return 0; + + sep2 = strchr(sep, ']'); + if (sep2 == NULL) + goto failed; + + for (parsed = sep; parsed < sep2; parsed = enditem) { + + enditem = ++parsed; + while (enditem < sep2 && *enditem != ',') + enditem++; + + if (enditem == parsed) /* no empty items */ + goto failed; + + if (sscanf(parsed, "%d-%d/%d%n", &lo, &hi, &stride, &scanned) < 3) { + + if (sscanf(parsed, "%d-%d%n", &lo, &hi, &scanned) < 2) { + + /* simple string enumeration */ + if (lnet_expand1tb(&pending, str, sep, sep2, + parsed, (int)(enditem - parsed)) != 0) + goto failed; + + continue; + } + + stride = 1; + } + + /* range expansion */ + + if (enditem != parsed + scanned) /* no trailing junk */ + goto failed; + + if (hi < 0 || lo < 0 || stride < 0 || hi < lo || + (hi - lo) % stride != 0) + goto failed; + + for (i = lo; i <= hi; i += stride) { + + snprintf(num, sizeof(num), "%d", i); + nob = strlen(num); + if (nob + 1 == sizeof(num)) + goto failed; + + if (lnet_expand1tb(&pending, str, sep, sep2, + num, nob) != 0) + goto failed; + } + } + + list_splice(&pending, tbs->prev); + return 1; + + failed: + lnet_free_text_bufs(&pending); + return -1; +} + +int +lnet_parse_hops (char *str, unsigned int *hops) +{ + int len = strlen(str); + int nob = len; + + return (sscanf(str, "%u%n", hops, &nob) >= 1 && + nob == len && + *hops > 0 && *hops < 256); +} + + +int +lnet_parse_route (char *str, int *im_a_router) +{ + /* static scratch buffer OK (single threaded) */ + static char cmd[LNET_SINGLE_TEXTBUF_NOB]; + + struct list_head nets; + struct list_head gateways; + struct list_head *tmp1; + struct list_head *tmp2; + __u32 net; + lnet_nid_t nid; + lnet_text_buf_t *ltb; + int rc; + char *sep; + char *token = str; + int ntokens = 0; + int myrc = -1; + unsigned int hops; + int got_hops = 0; + + INIT_LIST_HEAD(&gateways); + INIT_LIST_HEAD(&nets); + + /* save a copy of the string for error messages */ + strncpy(cmd, str, sizeof(cmd) - 1); + cmd[sizeof(cmd) - 1] = 0; + + sep = str; + for (;;) { + /* scan for token start */ + while (cfs_iswhite(*sep)) + sep++; + if (*sep == 0) { + if (ntokens < (got_hops ? 3 : 2)) + goto token_error; + break; + } + + ntokens++; + token = sep++; + + /* scan for token end */ + while (*sep != 0 && !cfs_iswhite(*sep)) + sep++; + if (*sep != 0) + *sep++ = 0; + + if (ntokens == 1) { + tmp2 = &nets; /* expanding nets */ + } else if (ntokens == 2 && + lnet_parse_hops(token, &hops)) { + got_hops = 1; /* got a hop count */ + continue; + } else { + tmp2 = &gateways; /* expanding gateways */ + } + + ltb = lnet_new_text_buf(strlen(token)); + if (ltb == NULL) + goto out; + + strcpy(ltb->ltb_text, token); + tmp1 = <b->ltb_list; + list_add_tail(tmp1, tmp2); + + while (tmp1 != tmp2) { + ltb = list_entry(tmp1, lnet_text_buf_t, ltb_list); + + rc = lnet_str2tbs_expand(tmp1->next, ltb->ltb_text); + if (rc < 0) + goto token_error; + + tmp1 = tmp1->next; + + if (rc > 0) { /* expanded! */ + list_del(<b->ltb_list); + lnet_free_text_buf(ltb); + continue; + } + + if (ntokens == 1) { + net = libcfs_str2net(ltb->ltb_text); + if (net == LNET_NIDNET(LNET_NID_ANY) || + LNET_NETTYP(net) == LOLND) + goto token_error; + } else { + nid = libcfs_str2nid(ltb->ltb_text); + if (nid == LNET_NID_ANY || + LNET_NETTYP(LNET_NIDNET(nid)) == LOLND) + goto token_error; + } + } + } + + if (!got_hops) + hops = 1; + + LASSERT (!list_empty(&nets)); + LASSERT (!list_empty(&gateways)); + + list_for_each (tmp1, &nets) { + ltb = list_entry(tmp1, lnet_text_buf_t, ltb_list); + net = libcfs_str2net(ltb->ltb_text); + LASSERT (net != LNET_NIDNET(LNET_NID_ANY)); + + list_for_each (tmp2, &gateways) { + ltb = list_entry(tmp2, lnet_text_buf_t, ltb_list); + nid = libcfs_str2nid(ltb->ltb_text); + LASSERT (nid != LNET_NID_ANY); + + if (lnet_islocalnid(nid)) { + *im_a_router = 1; + continue; + } + + rc = lnet_add_route (net, hops, nid); + if (rc != 0) { + CERROR("Can't create route " + "to %s via %s\n", + libcfs_net2str(net), + libcfs_nid2str(nid)); + goto out; + } + } + } + + myrc = 0; + goto out; + + token_error: + lnet_syntax("routes", cmd, (int)(token - str), strlen(token)); + out: + lnet_free_text_bufs(&nets); + lnet_free_text_bufs(&gateways); + return myrc; +} + +int +lnet_parse_route_tbs(struct list_head *tbs, int *im_a_router) +{ + lnet_text_buf_t *ltb; + + while (!list_empty(tbs)) { + ltb = list_entry(tbs->next, lnet_text_buf_t, ltb_list); + + if (lnet_parse_route(ltb->ltb_text, im_a_router) < 0) { + lnet_free_text_bufs(tbs); + return -EINVAL; + } + + list_del(<b->ltb_list); + lnet_free_text_buf(ltb); + } + + return 0; +} + +int +lnet_parse_routes (char *routes, int *im_a_router) +{ + struct list_head tbs; + int rc = 0; + + *im_a_router = 0; + + INIT_LIST_HEAD(&tbs); + + if (lnet_str2tbs_sep(&tbs, routes) < 0) { + CERROR("Error parsing routes\n"); + rc = -EINVAL; + } else { + rc = lnet_parse_route_tbs(&tbs, im_a_router); + } + + LASSERT (lnet_tbnob == 0); + return rc; +} + +int +lnet_match_network_token(char *token, int len, __u32 *ipaddrs, int nip) +{ + LIST_HEAD (list); + int rc; + int i; + + rc = cfs_ip_addr_parse(token, len, &list); + if (rc != 0) + return rc; + + for (rc = i = 0; !rc && i < nip; i++) + rc = cfs_ip_addr_match(ipaddrs[i], &list); + + cfs_ip_addr_free(&list); + + return rc; +} + +int +lnet_match_network_tokens(char *net_entry, __u32 *ipaddrs, int nip) +{ + static char tokens[LNET_SINGLE_TEXTBUF_NOB]; + + int matched = 0; + int ntokens = 0; + int len; + char *net = NULL; + char *sep; + char *token; + int rc; + + LASSERT (strlen(net_entry) < sizeof(tokens)); + + /* work on a copy of the string */ + strcpy(tokens, net_entry); + sep = tokens; + for (;;) { + /* scan for token start */ + while (cfs_iswhite(*sep)) + sep++; + if (*sep == 0) + break; + + token = sep++; + + /* scan for token end */ + while (*sep != 0 && !cfs_iswhite(*sep)) + sep++; + if (*sep != 0) + *sep++ = 0; + + if (ntokens++ == 0) { + net = token; + continue; + } + + len = strlen(token); + + rc = lnet_match_network_token(token, len, ipaddrs, nip); + if (rc < 0) { + lnet_syntax("ip2nets", net_entry, + (int)(token - tokens), len); + return rc; + } + + matched |= (rc != 0); + } + + if (!matched) + return 0; + + strcpy(net_entry, net); /* replace with matched net */ + return 1; +} + +__u32 +lnet_netspec2net(char *netspec) +{ + char *bracket = strchr(netspec, '('); + __u32 net; + + if (bracket != NULL) + *bracket = 0; + + net = libcfs_str2net(netspec); + + if (bracket != NULL) + *bracket = '('; + + return net; +} + +int +lnet_splitnets(char *source, struct list_head *nets) +{ + int offset = 0; + int offset2; + int len; + lnet_text_buf_t *tb; + lnet_text_buf_t *tb2; + struct list_head *t; + char *sep; + char *bracket; + __u32 net; + + LASSERT (!list_empty(nets)); + LASSERT (nets->next == nets->prev); /* single entry */ + + tb = list_entry(nets->next, lnet_text_buf_t, ltb_list); + + for (;;) { + sep = strchr(tb->ltb_text, ','); + bracket = strchr(tb->ltb_text, '('); + + if (sep != NULL && + bracket != NULL && + bracket < sep) { + /* netspec lists interfaces... */ + + offset2 = offset + (int)(bracket - tb->ltb_text); + len = strlen(bracket); + + bracket = strchr(bracket + 1, ')'); + + if (bracket == NULL || + !(bracket[1] == ',' || bracket[1] == 0)) { + lnet_syntax("ip2nets", source, offset2, len); + return -EINVAL; + } + + sep = (bracket[1] == 0) ? NULL : bracket + 1; + } + + if (sep != NULL) + *sep++ = 0; + + net = lnet_netspec2net(tb->ltb_text); + if (net == LNET_NIDNET(LNET_NID_ANY)) { + lnet_syntax("ip2nets", source, offset, + strlen(tb->ltb_text)); + return -EINVAL; + } + + list_for_each(t, nets) { + tb2 = list_entry(t, lnet_text_buf_t, ltb_list); + + if (tb2 == tb) + continue; + + if (net == lnet_netspec2net(tb2->ltb_text)) { + /* duplicate network */ + lnet_syntax("ip2nets", source, offset, + strlen(tb->ltb_text)); + return -EINVAL; + } + } + + if (sep == NULL) + return 0; + + offset += (int)(sep - tb->ltb_text); + tb2 = lnet_new_text_buf(strlen(sep)); + if (tb2 == NULL) + return -ENOMEM; + + strcpy(tb2->ltb_text, sep); + list_add_tail(&tb2->ltb_list, nets); + + tb = tb2; + } +} + +int +lnet_match_networks (char **networksp, char *ip2nets, __u32 *ipaddrs, int nip) +{ + static char networks[LNET_SINGLE_TEXTBUF_NOB]; + static char source[LNET_SINGLE_TEXTBUF_NOB]; + + struct list_head raw_entries; + struct list_head matched_nets; + struct list_head current_nets; + struct list_head *t; + struct list_head *t2; + lnet_text_buf_t *tb; + lnet_text_buf_t *tb2; + __u32 net1; + __u32 net2; + int len; + int count; + int dup; + int rc; + + INIT_LIST_HEAD(&raw_entries); + if (lnet_str2tbs_sep(&raw_entries, ip2nets) < 0) { + CERROR("Error parsing ip2nets\n"); + LASSERT (lnet_tbnob == 0); + return -EINVAL; + } + + INIT_LIST_HEAD(&matched_nets); + INIT_LIST_HEAD(¤t_nets); + networks[0] = 0; + count = 0; + len = 0; + rc = 0; + + while (!list_empty(&raw_entries)) { + tb = list_entry(raw_entries.next, lnet_text_buf_t, + ltb_list); + + strncpy(source, tb->ltb_text, sizeof(source)-1); + source[sizeof(source)-1] = 0; + + /* replace ltb_text with the network(s) add on match */ + rc = lnet_match_network_tokens(tb->ltb_text, ipaddrs, nip); + if (rc < 0) + break; + + list_del(&tb->ltb_list); + + if (rc == 0) { /* no match */ + lnet_free_text_buf(tb); + continue; + } + + /* split into separate networks */ + INIT_LIST_HEAD(¤t_nets); + list_add(&tb->ltb_list, ¤t_nets); + rc = lnet_splitnets(source, ¤t_nets); + if (rc < 0) + break; + + dup = 0; + list_for_each (t, ¤t_nets) { + tb = list_entry(t, lnet_text_buf_t, ltb_list); + net1 = lnet_netspec2net(tb->ltb_text); + LASSERT (net1 != LNET_NIDNET(LNET_NID_ANY)); + + list_for_each(t2, &matched_nets) { + tb2 = list_entry(t2, lnet_text_buf_t, + ltb_list); + net2 = lnet_netspec2net(tb2->ltb_text); + LASSERT (net2 != LNET_NIDNET(LNET_NID_ANY)); + + if (net1 == net2) { + dup = 1; + break; + } + } + + if (dup) + break; + } + + if (dup) { + lnet_free_text_bufs(¤t_nets); + continue; + } + + list_for_each_safe(t, t2, ¤t_nets) { + tb = list_entry(t, lnet_text_buf_t, ltb_list); + + list_del(&tb->ltb_list); + list_add_tail(&tb->ltb_list, &matched_nets); + + len += snprintf(networks + len, sizeof(networks) - len, + "%s%s", (len == 0) ? "" : ",", + tb->ltb_text); + + if (len >= sizeof(networks)) { + CERROR("Too many matched networks\n"); + rc = -E2BIG; + goto out; + } + } + + count++; + } + + out: + lnet_free_text_bufs(&raw_entries); + lnet_free_text_bufs(&matched_nets); + lnet_free_text_bufs(¤t_nets); + LASSERT (lnet_tbnob == 0); + + if (rc < 0) + return rc; + + *networksp = networks; + return count; +} + +void +lnet_ipaddr_free_enumeration(__u32 *ipaddrs, int nip) +{ + LIBCFS_FREE(ipaddrs, nip * sizeof(*ipaddrs)); +} + +int +lnet_ipaddr_enumerate (__u32 **ipaddrsp) +{ + int up; + __u32 netmask; + __u32 *ipaddrs; + __u32 *ipaddrs2; + int nip; + char **ifnames; + int nif = libcfs_ipif_enumerate(&ifnames); + int i; + int rc; + + if (nif <= 0) + return nif; + + LIBCFS_ALLOC(ipaddrs, nif * sizeof(*ipaddrs)); + if (ipaddrs == NULL) { + CERROR("Can't allocate ipaddrs[%d]\n", nif); + libcfs_ipif_free_enumeration(ifnames, nif); + return -ENOMEM; + } + + for (i = nip = 0; i < nif; i++) { + if (!strcmp(ifnames[i], "lo")) + continue; + + rc = libcfs_ipif_query(ifnames[i], &up, + &ipaddrs[nip], &netmask); + if (rc != 0) { + CWARN("Can't query interface %s: %d\n", + ifnames[i], rc); + continue; + } + + if (!up) { + CWARN("Ignoring interface %s: it's down\n", + ifnames[i]); + continue; + } + + nip++; + } + + libcfs_ipif_free_enumeration(ifnames, nif); + + if (nip == nif) { + *ipaddrsp = ipaddrs; + } else { + if (nip > 0) { + LIBCFS_ALLOC(ipaddrs2, nip * sizeof(*ipaddrs2)); + if (ipaddrs2 == NULL) { + CERROR("Can't allocate ipaddrs[%d]\n", nip); + nip = -ENOMEM; + } else { + memcpy(ipaddrs2, ipaddrs, + nip * sizeof(*ipaddrs)); + *ipaddrsp = ipaddrs2; + rc = nip; + } + } + lnet_ipaddr_free_enumeration(ipaddrs, nif); + } + return nip; +} + +int +lnet_parse_ip2nets (char **networksp, char *ip2nets) +{ + __u32 *ipaddrs; + int nip = lnet_ipaddr_enumerate(&ipaddrs); + int rc; + + if (nip < 0) { + LCONSOLE_ERROR_MSG(0x117, "Error %d enumerating local IP " + "interfaces for ip2nets to match\n", nip); + return nip; + } + + if (nip == 0) { + LCONSOLE_ERROR_MSG(0x118, "No local IP interfaces " + "for ip2nets to match\n"); + return -ENOENT; + } + + rc = lnet_match_networks(networksp, ip2nets, ipaddrs, nip); + lnet_ipaddr_free_enumeration(ipaddrs, nip); + + if (rc < 0) { + LCONSOLE_ERROR_MSG(0x119, "Error %d parsing ip2nets\n", rc); + return rc; + } + + if (rc == 0) { + LCONSOLE_ERROR_MSG(0x11a, "ip2nets does not match " + "any local IP interfaces\n"); + return -ENOENT; + } + + return 0; +} + +int +lnet_set_ip_niaddr (lnet_ni_t *ni) +{ + __u32 net = LNET_NIDNET(ni->ni_nid); + char **names; + int n; + __u32 ip; + __u32 netmask; + int up; + int i; + int rc; + + /* Convenience for LNDs that use the IP address of a local interface as + * the local address part of their NID */ + + if (ni->ni_interfaces[0] != NULL) { + + CLASSERT (LNET_MAX_INTERFACES > 1); + + if (ni->ni_interfaces[1] != NULL) { + CERROR("Net %s doesn't support multiple interfaces\n", + libcfs_net2str(net)); + return -EPERM; + } + + rc = libcfs_ipif_query(ni->ni_interfaces[0], + &up, &ip, &netmask); + if (rc != 0) { + CERROR("Net %s can't query interface %s: %d\n", + libcfs_net2str(net), ni->ni_interfaces[0], rc); + return -EPERM; + } + + if (!up) { + CERROR("Net %s can't use interface %s: it's down\n", + libcfs_net2str(net), ni->ni_interfaces[0]); + return -ENETDOWN; + } + + ni->ni_nid = LNET_MKNID(net, ip); + return 0; + } + + n = libcfs_ipif_enumerate(&names); + if (n <= 0) { + CERROR("Net %s can't enumerate interfaces: %d\n", + libcfs_net2str(net), n); + return 0; + } + + for (i = 0; i < n; i++) { + if (!strcmp(names[i], "lo")) /* skip the loopback IF */ + continue; + + rc = libcfs_ipif_query(names[i], &up, &ip, &netmask); + + if (rc != 0) { + CWARN("Net %s can't query interface %s: %d\n", + libcfs_net2str(net), names[i], rc); + continue; + } + + if (!up) { + CWARN("Net %s ignoring interface %s (down)\n", + libcfs_net2str(net), names[i]); + continue; + } + + libcfs_ipif_free_enumeration(names, n); + ni->ni_nid = LNET_MKNID(net, ip); + return 0; + } + + CERROR("Net %s can't find any interfaces\n", libcfs_net2str(net)); + libcfs_ipif_free_enumeration(names, n); + return -ENOENT; +} +EXPORT_SYMBOL(lnet_set_ip_niaddr); |