diff options
Diffstat (limited to 'dcb/dcb_app.c')
| -rw-r--r-- | dcb/dcb_app.c | 797 |
1 files changed, 797 insertions, 0 deletions
diff --git a/dcb/dcb_app.c b/dcb/dcb_app.c new file mode 100644 index 0000000..dad3455 --- /dev/null +++ b/dcb/dcb_app.c @@ -0,0 +1,797 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include <errno.h> +#include <inttypes.h> +#include <stdio.h> +#include <libmnl/libmnl.h> +#include <linux/dcbnl.h> + +#include "dcb.h" +#include "utils.h" +#include "rt_names.h" + +static void dcb_app_help_add(void) +{ + fprintf(stderr, + "Usage: dcb app { add | del | replace } dev STRING\n" + " [ default-prio PRIO ]\n" + " [ ethtype-prio ET:PRIO ]\n" + " [ stream-port-prio PORT:PRIO ]\n" + " [ dgram-port-prio PORT:PRIO ]\n" + " [ port-prio PORT:PRIO ]\n" + " [ dscp-prio INTEGER:PRIO ]\n" + "\n" + " where PRIO := { 0 .. 7 }\n" + " ET := { 0x600 .. 0xffff }\n" + " PORT := { 1 .. 65535 }\n" + " DSCP := { 0 .. 63 }\n" + "\n" + ); +} + +static void dcb_app_help_show_flush(void) +{ + fprintf(stderr, + "Usage: dcb app { show | flush } dev STRING\n" + " [ default-prio ]\n" + " [ ethtype-prio ]\n" + " [ stream-port-prio ]\n" + " [ dgram-port-prio ]\n" + " [ port-prio ]\n" + " [ dscp-prio ]\n" + "\n" + ); +} + +static void dcb_app_help(void) +{ + fprintf(stderr, + "Usage: dcb app help\n" + "\n" + ); + dcb_app_help_show_flush(); + dcb_app_help_add(); +} + +struct dcb_app_table { + struct dcb_app *apps; + size_t n_apps; +}; + +static void dcb_app_table_fini(struct dcb_app_table *tab) +{ + free(tab->apps); +} + +static int dcb_app_table_push(struct dcb_app_table *tab, struct dcb_app *app) +{ + struct dcb_app *apps = realloc(tab->apps, (tab->n_apps + 1) * sizeof(*tab->apps)); + + if (apps == NULL) { + perror("Cannot allocate APP table"); + return -ENOMEM; + } + + tab->apps = apps; + tab->apps[tab->n_apps++] = *app; + return 0; +} + +static void dcb_app_table_remove_existing(struct dcb_app_table *a, + const struct dcb_app_table *b) +{ + size_t ia, ja; + size_t ib; + + for (ia = 0, ja = 0; ia < a->n_apps; ia++) { + struct dcb_app *aa = &a->apps[ia]; + bool found = false; + + for (ib = 0; ib < b->n_apps; ib++) { + const struct dcb_app *ab = &b->apps[ib]; + + if (aa->selector == ab->selector && + aa->protocol == ab->protocol && + aa->priority == ab->priority) { + found = true; + break; + } + } + + if (!found) + a->apps[ja++] = *aa; + } + + a->n_apps = ja; +} + +static void dcb_app_table_remove_replaced(struct dcb_app_table *a, + const struct dcb_app_table *b) +{ + size_t ia, ja; + size_t ib; + + for (ia = 0, ja = 0; ia < a->n_apps; ia++) { + struct dcb_app *aa = &a->apps[ia]; + bool present = false; + bool found = false; + + for (ib = 0; ib < b->n_apps; ib++) { + const struct dcb_app *ab = &b->apps[ib]; + + if (aa->selector == ab->selector && + aa->protocol == ab->protocol) + present = true; + else + continue; + + if (aa->priority == ab->priority) { + found = true; + break; + } + } + + /* Entries that remain in A will be removed, so keep in the + * table only APP entries whose sel/pid is mentioned in B, + * but that do not have the full sel/pid/prio match. + */ + if (present && !found) + a->apps[ja++] = *aa; + } + + a->n_apps = ja; +} + +static int dcb_app_table_copy(struct dcb_app_table *a, + const struct dcb_app_table *b) +{ + size_t i; + int ret; + + for (i = 0; i < b->n_apps; i++) { + ret = dcb_app_table_push(a, &b->apps[i]); + if (ret != 0) + return ret; + } + return 0; +} + +static int dcb_app_cmp(const struct dcb_app *a, const struct dcb_app *b) +{ + if (a->protocol < b->protocol) + return -1; + if (a->protocol > b->protocol) + return 1; + return a->priority - b->priority; +} + +static int dcb_app_cmp_cb(const void *a, const void *b) +{ + return dcb_app_cmp(a, b); +} + +static void dcb_app_table_sort(struct dcb_app_table *tab) +{ + qsort(tab->apps, tab->n_apps, sizeof(*tab->apps), dcb_app_cmp_cb); +} + +struct dcb_app_parse_mapping { + __u8 selector; + struct dcb_app_table *tab; + int err; +}; + +static void dcb_app_parse_mapping_cb(__u32 key, __u64 value, void *data) +{ + struct dcb_app_parse_mapping *pm = data; + struct dcb_app app = { + .selector = pm->selector, + .priority = value, + .protocol = key, + }; + + if (pm->err) + return; + + pm->err = dcb_app_table_push(pm->tab, &app); +} + +static int dcb_app_parse_mapping_ethtype_prio(__u32 key, char *value, void *data) +{ + __u8 prio; + + if (key < 0x600) { + fprintf(stderr, "Protocol IDs < 0x600 are reserved for EtherType\n"); + return -EINVAL; + } + + if (get_u8(&prio, value, 0)) + return -EINVAL; + + return dcb_parse_mapping("ETHTYPE", key, 0xffff, + "PRIO", prio, IEEE_8021QAZ_MAX_TCS - 1, + dcb_app_parse_mapping_cb, data); +} + +static int dcb_app_parse_dscp(__u32 *key, const char *arg) +{ + if (parse_mapping_num_all(key, arg) == 0) + return 0; + + if (rtnl_dsfield_a2n(key, arg) != 0) + return -1; + + if (*key & 0x03) { + fprintf(stderr, "The values `%s' uses non-DSCP bits.\n", arg); + return -1; + } + + /* Unshift the value to convert it from dsfield to DSCP. */ + *key >>= 2; + return 0; +} + +static int dcb_app_parse_mapping_dscp_prio(__u32 key, char *value, void *data) +{ + __u8 prio; + + if (get_u8(&prio, value, 0)) + return -EINVAL; + + return dcb_parse_mapping("DSCP", key, 63, + "PRIO", prio, IEEE_8021QAZ_MAX_TCS - 1, + dcb_app_parse_mapping_cb, data); +} + +static int dcb_app_parse_mapping_port_prio(__u32 key, char *value, void *data) +{ + __u8 prio; + + if (key == 0) { + fprintf(stderr, "Port ID of 0 is invalid\n"); + return -EINVAL; + } + + if (get_u8(&prio, value, 0)) + return -EINVAL; + + return dcb_parse_mapping("PORT", key, 0xffff, + "PRIO", prio, IEEE_8021QAZ_MAX_TCS - 1, + dcb_app_parse_mapping_cb, data); +} + +static int dcb_app_parse_default_prio(int *argcp, char ***argvp, struct dcb_app_table *tab) +{ + int argc = *argcp; + char **argv = *argvp; + int ret = 0; + + while (argc > 0) { + struct dcb_app app; + __u8 prio; + + if (get_u8(&prio, *argv, 0)) { + ret = 1; + break; + } + + app = (struct dcb_app){ + .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE, + .protocol = 0, + .priority = prio, + }; + ret = dcb_app_table_push(tab, &app); + if (ret != 0) + break; + + argc--, argv++; + } + + *argcp = argc; + *argvp = argv; + return ret; +} + +static bool dcb_app_is_ethtype(const struct dcb_app *app) +{ + return app->selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE && + app->protocol != 0; +} + +static bool dcb_app_is_default(const struct dcb_app *app) +{ + return app->selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE && + app->protocol == 0; +} + +static bool dcb_app_is_dscp(const struct dcb_app *app) +{ + return app->selector == IEEE_8021QAZ_APP_SEL_DSCP; +} + +static bool dcb_app_is_stream_port(const struct dcb_app *app) +{ + return app->selector == IEEE_8021QAZ_APP_SEL_STREAM; +} + +static bool dcb_app_is_dgram_port(const struct dcb_app *app) +{ + return app->selector == IEEE_8021QAZ_APP_SEL_DGRAM; +} + +static bool dcb_app_is_port(const struct dcb_app *app) +{ + return app->selector == IEEE_8021QAZ_APP_SEL_ANY; +} + +static int dcb_app_print_key_dec(__u16 protocol) +{ + return print_uint(PRINT_ANY, NULL, "%d:", protocol); +} + +static int dcb_app_print_key_hex(__u16 protocol) +{ + return print_uint(PRINT_ANY, NULL, "%x:", protocol); +} + +static int dcb_app_print_key_dscp(__u16 protocol) +{ + const char *name = rtnl_dsfield_get_name(protocol << 2); + + + if (!is_json_context() && name != NULL) + return print_string(PRINT_FP, NULL, "%s:", name); + return print_uint(PRINT_ANY, NULL, "%d:", protocol); +} + +static void dcb_app_print_filtered(const struct dcb_app_table *tab, + bool (*filter)(const struct dcb_app *), + int (*print_key)(__u16 protocol), + const char *json_name, + const char *fp_name) +{ + bool first = true; + size_t i; + + for (i = 0; i < tab->n_apps; i++) { + struct dcb_app *app = &tab->apps[i]; + + if (!filter(app)) + continue; + if (first) { + open_json_array(PRINT_JSON, json_name); + print_string(PRINT_FP, NULL, "%s ", fp_name); + first = false; + } + + open_json_array(PRINT_JSON, NULL); + print_key(app->protocol); + print_uint(PRINT_ANY, NULL, "%d ", app->priority); + close_json_array(PRINT_JSON, NULL); + } + + if (!first) { + close_json_array(PRINT_JSON, json_name); + print_nl(); + } +} + +static void dcb_app_print_ethtype_prio(const struct dcb_app_table *tab) +{ + dcb_app_print_filtered(tab, dcb_app_is_ethtype, dcb_app_print_key_hex, + "ethtype_prio", "ethtype-prio"); +} + +static void dcb_app_print_dscp_prio(const struct dcb *dcb, + const struct dcb_app_table *tab) +{ + dcb_app_print_filtered(tab, dcb_app_is_dscp, + dcb->numeric ? dcb_app_print_key_dec + : dcb_app_print_key_dscp, + "dscp_prio", "dscp-prio"); +} + +static void dcb_app_print_stream_port_prio(const struct dcb_app_table *tab) +{ + dcb_app_print_filtered(tab, dcb_app_is_stream_port, dcb_app_print_key_dec, + "stream_port_prio", "stream-port-prio"); +} + +static void dcb_app_print_dgram_port_prio(const struct dcb_app_table *tab) +{ + dcb_app_print_filtered(tab, dcb_app_is_dgram_port, dcb_app_print_key_dec, + "dgram_port_prio", "dgram-port-prio"); +} + +static void dcb_app_print_port_prio(const struct dcb_app_table *tab) +{ + dcb_app_print_filtered(tab, dcb_app_is_port, dcb_app_print_key_dec, + "port_prio", "port-prio"); +} + +static void dcb_app_print_default_prio(const struct dcb_app_table *tab) +{ + bool first = true; + size_t i; + + for (i = 0; i < tab->n_apps; i++) { + if (!dcb_app_is_default(&tab->apps[i])) + continue; + if (first) { + open_json_array(PRINT_JSON, "default_prio"); + print_string(PRINT_FP, NULL, "default-prio ", NULL); + first = false; + } + print_uint(PRINT_ANY, NULL, "%d ", tab->apps[i].priority); + } + + if (!first) { + close_json_array(PRINT_JSON, "default_prio"); + print_nl(); + } +} + +static void dcb_app_print(const struct dcb *dcb, const struct dcb_app_table *tab) +{ + dcb_app_print_ethtype_prio(tab); + dcb_app_print_default_prio(tab); + dcb_app_print_dscp_prio(dcb, tab); + dcb_app_print_stream_port_prio(tab); + dcb_app_print_dgram_port_prio(tab); + dcb_app_print_port_prio(tab); +} + +static int dcb_app_get_table_attr_cb(const struct nlattr *attr, void *data) +{ + struct dcb_app_table *tab = data; + struct dcb_app *app; + int ret; + + if (mnl_attr_get_type(attr) != DCB_ATTR_IEEE_APP) { + fprintf(stderr, "Unknown attribute in DCB_ATTR_IEEE_APP_TABLE: %d\n", + mnl_attr_get_type(attr)); + return MNL_CB_OK; + } + if (mnl_attr_get_payload_len(attr) < sizeof(struct dcb_app)) { + fprintf(stderr, "DCB_ATTR_IEEE_APP payload expected to have size %zd, not %d\n", + sizeof(struct dcb_app), mnl_attr_get_payload_len(attr)); + return MNL_CB_OK; + } + + app = mnl_attr_get_payload(attr); + ret = dcb_app_table_push(tab, app); + if (ret != 0) + return MNL_CB_ERROR; + + return MNL_CB_OK; +} + +static int dcb_app_get(struct dcb *dcb, const char *dev, struct dcb_app_table *tab) +{ + uint16_t payload_len; + void *payload; + int ret; + + ret = dcb_get_attribute_va(dcb, dev, DCB_ATTR_IEEE_APP_TABLE, &payload, &payload_len); + if (ret != 0) + return ret; + + ret = mnl_attr_parse_payload(payload, payload_len, dcb_app_get_table_attr_cb, tab); + if (ret != MNL_CB_OK) + return -EINVAL; + + return 0; +} + +struct dcb_app_add_del { + const struct dcb_app_table *tab; + bool (*filter)(const struct dcb_app *app); +}; + +static int dcb_app_add_del_cb(struct dcb *dcb, struct nlmsghdr *nlh, void *data) +{ + struct dcb_app_add_del *add_del = data; + struct nlattr *nest; + size_t i; + + nest = mnl_attr_nest_start(nlh, DCB_ATTR_IEEE_APP_TABLE); + + for (i = 0; i < add_del->tab->n_apps; i++) { + const struct dcb_app *app = &add_del->tab->apps[i]; + + if (add_del->filter == NULL || add_del->filter(app)) + mnl_attr_put(nlh, DCB_ATTR_IEEE_APP, sizeof(*app), app); + } + + mnl_attr_nest_end(nlh, nest); + return 0; +} + +static int dcb_app_add_del(struct dcb *dcb, const char *dev, int command, + const struct dcb_app_table *tab, + bool (*filter)(const struct dcb_app *)) +{ + struct dcb_app_add_del add_del = { + .tab = tab, + .filter = filter, + }; + + if (tab->n_apps == 0) + return 0; + + return dcb_set_attribute_va(dcb, command, dev, dcb_app_add_del_cb, &add_del); +} + +static int dcb_cmd_app_parse_add_del(struct dcb *dcb, const char *dev, + int argc, char **argv, struct dcb_app_table *tab) +{ + struct dcb_app_parse_mapping pm = { + .tab = tab, + }; + int ret; + + if (!argc) { + dcb_app_help_add(); + return 0; + } + + do { + if (matches(*argv, "help") == 0) { + dcb_app_help_add(); + return 0; + } else if (matches(*argv, "ethtype-prio") == 0) { + NEXT_ARG(); + pm.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE; + ret = parse_mapping(&argc, &argv, false, + &dcb_app_parse_mapping_ethtype_prio, + &pm); + } else if (matches(*argv, "default-prio") == 0) { + NEXT_ARG(); + ret = dcb_app_parse_default_prio(&argc, &argv, pm.tab); + if (ret != 0) { + fprintf(stderr, "Invalid default priority %s\n", *argv); + return ret; + } + } else if (matches(*argv, "dscp-prio") == 0) { + NEXT_ARG(); + pm.selector = IEEE_8021QAZ_APP_SEL_DSCP; + ret = parse_mapping_gen(&argc, &argv, + &dcb_app_parse_dscp, + &dcb_app_parse_mapping_dscp_prio, + &pm); + } else if (matches(*argv, "stream-port-prio") == 0) { + NEXT_ARG(); + pm.selector = IEEE_8021QAZ_APP_SEL_STREAM; + ret = parse_mapping(&argc, &argv, false, + &dcb_app_parse_mapping_port_prio, + &pm); + } else if (matches(*argv, "dgram-port-prio") == 0) { + NEXT_ARG(); + pm.selector = IEEE_8021QAZ_APP_SEL_DGRAM; + ret = parse_mapping(&argc, &argv, false, + &dcb_app_parse_mapping_port_prio, + &pm); + } else if (matches(*argv, "port-prio") == 0) { + NEXT_ARG(); + pm.selector = IEEE_8021QAZ_APP_SEL_ANY; + ret = parse_mapping(&argc, &argv, false, + &dcb_app_parse_mapping_port_prio, + &pm); + } else { + fprintf(stderr, "What is \"%s\"?\n", *argv); + dcb_app_help_add(); + return -EINVAL; + } + + if (ret != 0) { + fprintf(stderr, "Invalid mapping %s\n", *argv); + return ret; + } + if (pm.err) + return pm.err; + } while (argc > 0); + + return 0; +} + +static int dcb_cmd_app_add(struct dcb *dcb, const char *dev, int argc, char **argv) +{ + struct dcb_app_table tab = {}; + int ret; + + ret = dcb_cmd_app_parse_add_del(dcb, dev, argc, argv, &tab); + if (ret != 0) + return ret; + + ret = dcb_app_add_del(dcb, dev, DCB_CMD_IEEE_SET, &tab, NULL); + dcb_app_table_fini(&tab); + return ret; +} + +static int dcb_cmd_app_del(struct dcb *dcb, const char *dev, int argc, char **argv) +{ + struct dcb_app_table tab = {}; + int ret; + + ret = dcb_cmd_app_parse_add_del(dcb, dev, argc, argv, &tab); + if (ret != 0) + return ret; + + ret = dcb_app_add_del(dcb, dev, DCB_CMD_IEEE_DEL, &tab, NULL); + dcb_app_table_fini(&tab); + return ret; +} + +static int dcb_cmd_app_show(struct dcb *dcb, const char *dev, int argc, char **argv) +{ + struct dcb_app_table tab = {}; + int ret; + + ret = dcb_app_get(dcb, dev, &tab); + if (ret != 0) + return ret; + + dcb_app_table_sort(&tab); + + open_json_object(NULL); + + if (!argc) { + dcb_app_print(dcb, &tab); + goto out; + } + + do { + if (matches(*argv, "help") == 0) { + dcb_app_help_show_flush(); + goto out; + } else if (matches(*argv, "ethtype-prio") == 0) { + dcb_app_print_ethtype_prio(&tab); + } else if (matches(*argv, "dscp-prio") == 0) { + dcb_app_print_dscp_prio(dcb, &tab); + } else if (matches(*argv, "stream-port-prio") == 0) { + dcb_app_print_stream_port_prio(&tab); + } else if (matches(*argv, "dgram-port-prio") == 0) { + dcb_app_print_dgram_port_prio(&tab); + } else if (matches(*argv, "port-prio") == 0) { + dcb_app_print_port_prio(&tab); + } else if (matches(*argv, "default-prio") == 0) { + dcb_app_print_default_prio(&tab); + } else { + fprintf(stderr, "What is \"%s\"?\n", *argv); + dcb_app_help_show_flush(); + ret = -EINVAL; + goto out; + } + + NEXT_ARG_FWD(); + } while (argc > 0); + +out: + close_json_object(); + dcb_app_table_fini(&tab); + return ret; +} + +static int dcb_cmd_app_flush(struct dcb *dcb, const char *dev, int argc, char **argv) +{ + struct dcb_app_table tab = {}; + int ret; + + ret = dcb_app_get(dcb, dev, &tab); + if (ret != 0) + return ret; + + if (!argc) { + ret = dcb_app_add_del(dcb, dev, DCB_CMD_IEEE_DEL, &tab, NULL); + goto out; + } + + do { + if (matches(*argv, "help") == 0) { + dcb_app_help_show_flush(); + goto out; + } else if (matches(*argv, "ethtype-prio") == 0) { + ret = dcb_app_add_del(dcb, dev, DCB_CMD_IEEE_DEL, &tab, + &dcb_app_is_ethtype); + if (ret != 0) + goto out; + } else if (matches(*argv, "default-prio") == 0) { + ret = dcb_app_add_del(dcb, dev, DCB_CMD_IEEE_DEL, &tab, + &dcb_app_is_default); + if (ret != 0) + goto out; + } else if (matches(*argv, "dscp-prio") == 0) { + ret = dcb_app_add_del(dcb, dev, DCB_CMD_IEEE_DEL, &tab, + &dcb_app_is_dscp); + if (ret != 0) + goto out; + } else { + fprintf(stderr, "What is \"%s\"?\n", *argv); + dcb_app_help_show_flush(); + ret = -EINVAL; + goto out; + } + + NEXT_ARG_FWD(); + } while (argc > 0); + +out: + dcb_app_table_fini(&tab); + return ret; +} + +static int dcb_cmd_app_replace(struct dcb *dcb, const char *dev, int argc, char **argv) +{ + struct dcb_app_table orig = {}; + struct dcb_app_table tab = {}; + struct dcb_app_table new = {}; + int ret; + + ret = dcb_app_get(dcb, dev, &orig); + if (ret != 0) + return ret; + + ret = dcb_cmd_app_parse_add_del(dcb, dev, argc, argv, &tab); + if (ret != 0) + goto out; + + /* Attempts to add an existing entry would be rejected, so drop + * these entries from tab. + */ + ret = dcb_app_table_copy(&new, &tab); + if (ret != 0) + goto out; + dcb_app_table_remove_existing(&new, &orig); + + ret = dcb_app_add_del(dcb, dev, DCB_CMD_IEEE_SET, &new, NULL); + if (ret != 0) { + fprintf(stderr, "Could not add new APP entries\n"); + goto out; + } + + /* Remove the obsolete entries. */ + dcb_app_table_remove_replaced(&orig, &tab); + ret = dcb_app_add_del(dcb, dev, DCB_CMD_IEEE_DEL, &orig, NULL); + if (ret != 0) { + fprintf(stderr, "Could not remove replaced APP entries\n"); + goto out; + } + +out: + dcb_app_table_fini(&new); + dcb_app_table_fini(&tab); + dcb_app_table_fini(&orig); + return 0; +} + +int dcb_cmd_app(struct dcb *dcb, int argc, char **argv) +{ + if (!argc || matches(*argv, "help") == 0) { + dcb_app_help(); + return 0; + } else if (matches(*argv, "show") == 0) { + NEXT_ARG_FWD(); + return dcb_cmd_parse_dev(dcb, argc, argv, + dcb_cmd_app_show, dcb_app_help_show_flush); + } else if (matches(*argv, "flush") == 0) { + NEXT_ARG_FWD(); + return dcb_cmd_parse_dev(dcb, argc, argv, + dcb_cmd_app_flush, dcb_app_help_show_flush); + } else if (matches(*argv, "add") == 0) { + NEXT_ARG_FWD(); + return dcb_cmd_parse_dev(dcb, argc, argv, + dcb_cmd_app_add, dcb_app_help_add); + } else if (matches(*argv, "del") == 0) { + NEXT_ARG_FWD(); + return dcb_cmd_parse_dev(dcb, argc, argv, + dcb_cmd_app_del, dcb_app_help_add); + } else if (matches(*argv, "replace") == 0) { + NEXT_ARG_FWD(); + return dcb_cmd_parse_dev(dcb, argc, argv, + dcb_cmd_app_replace, dcb_app_help_add); + } else { + fprintf(stderr, "What is \"%s\"?\n", *argv); + dcb_app_help(); + return -EINVAL; + } +} |