summaryrefslogtreecommitdiffstats
path: root/src/plugins/avf/virtchnl.h
diff options
context:
space:
mode:
authorDamjan Marion <damarion@cisco.com>2020-07-16 16:22:48 +0200
committerDamjan Marion <damarion@cisco.com>2020-07-16 17:52:36 +0200
commit9a0f2a5e7f678de58807fd49d47deec367656715 (patch)
treedc2fd59cdfa876afd683ef3105f7bfd5ae808831 /src/plugins/avf/virtchnl.h
parent284e658dbf6f7d363688c1e1765e352042b88089 (diff)
ip: optimize ip4_header_checksum, take 2
- add 64-bit version - remove byte swaps, as they are actually not needed Type: improvement Change-Id: Ia1efe54ee80b4ae7633b9ab36b3154c3357006d7 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/plugins/avf/virtchnl.h')
0 files changed, 0 insertions, 0 deletions
4 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 
/*
 * Copyright (c) 2016 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <vnet/fib/fib_source.h>

static const char *fib_source_names[] = FIB_SOURCES;
static const char *fib_source_behaviour_names[] = FIB_SOURCE_BEHAVIOURS;

static fib_source_t fib_source_id = FIB_SOURCE_LAST+1;

typedef struct fib_source_prio_t_
{
    fib_source_priority_t fsp_class;
    fib_source_priority_t fsp_slot;
} fib_source_prio_t;

/**
 * for each client requested priority count the number pf uses of
 * that prio so we can asign is usage a slot number, and therefore
 * each request will have a unique value.
 */
STATIC_ASSERT_SIZEOF(fib_source_priority_t, 1);
static fib_source_priority_t fib_source_prio_by_class[0x100];

typedef struct fib_source_reg_t_
{
    fib_source_t fsr_source;
    const char *fsr_name;
    fib_source_behaviour_t fsr_behaviour;
    fib_source_prio_t fsr_prio;
} fib_source_reg_t;

static fib_source_reg_t *fib_source_regs;


u16
fib_source_get_prio (fib_source_t src)
{
    ASSERT(vec_len(fib_source_regs) > src);

    return (((u16)fib_source_regs[src].fsr_prio.fsp_class << 8) |
            fib_source_regs[src].fsr_prio.fsp_slot);
}

fib_source_behaviour_t
fib_source_get_behaviour (fib_source_t src)
{
    ASSERT(vec_len(fib_source_regs) > src);

    return (fib_source_regs[src].fsr_behaviour);
}

u8 *
format_fib_source (u8 *s, va_list *a)
{
    fib_source_t src = va_arg(*a, int);

    ASSERT(vec_len(fib_source_regs) > src);

    return (format(s, "%s", fib_source_regs[src].fsr_name));
}

fib_source_priority_cmp_t
fib_source_cmp (fib_source_t s1,
                fib_source_t s2)
{
    if (fib_source_get_prio(s1) <
        fib_source_get_prio(s2))
    {
        return (FIB_SOURCE_CMP_BETTER);
    }
    else if (fib_source_get_prio(s1) >
             fib_source_get_prio(s2))
    {
        return (FIB_SOURCE_CMP_WORSE);
    }
    return (FIB_SOURCE_CMP_EQUAL);
}

static void
fib_source_reg_init (fib_source_t src,
                     const char *name,
                     fib_source_priority_t prio,
                     fib_source_behaviour_t bh)
{
    fib_source_priority_t slot;
    fib_source_reg_t *fsr;

    /*
     * ensure we assign a unique priority to each request
     * otherwise different source will be treated like ECMP
     */
    slot = fib_source_prio_by_class[prio]++;

    vec_validate(fib_source_regs, src);

    fsr = &fib_source_regs[src];
    fsr->fsr_source = src;
    fsr->fsr_name = strdup(name);
    fsr->fsr_prio.fsp_class = prio;
    fsr->fsr_prio.fsp_slot = slot;
    fsr->fsr_behaviour = bh;
}

fib_source_t
fib_source_allocate (const char *name,
                     fib_source_priority_t prio,
                     fib_source_behaviour_t bh)
{
    fib_source_t src;

    // max value range
    ASSERT(fib_source_id < 255);
    if (fib_source_id == 255)
        return (FIB_SOURCE_INVALID);

    src = fib_source_id++;

    fib_source_reg_init(src, name, prio, bh);

    return (src);
}

void
fib_source_register (fib_source_t src,
                     fib_source_priority_t prio,
                     fib_source_behaviour_t bh)
{
    fib_source_reg_init(src, fib_source_names[src], prio, bh);
}

static u8 *
format_fib_source_reg (u8 *s, va_list *a)
{
    fib_source_reg_t *fsr = va_arg(*a, fib_source_reg_t*);

    s = format(s, "[%d] %U prio:%d.%d behaviour:%s",
               fsr->fsr_source,
               format_fib_source, fsr->fsr_source,
               fsr->fsr_prio.fsp_class, fsr->fsr_prio.fsp_slot,
               fib_source_behaviour_names[fsr->fsr_behaviour]);

    return (s);
}

static int
fib_source_reg_cmp_for_sort (void * v1,
                             void * v2)
{
    fib_source_reg_t *fsr1 = v1, *fsr2 = v2;

    return (fib_source_get_prio(fsr1->fsr_source) -
            fib_source_get_prio(fsr2->fsr_source));
}

void
fib_source_walk (fib_source_walk_t fn,
                 void *ctx)
{
    fib_source_reg_t *fsr;

    vec_foreach(fsr, fib_source_regs)
    {
        if (WALK_STOP == fn(fsr->fsr_source,
                            fsr->fsr_name,
                            fsr->fsr_prio.fsp_class,
                            fsr->fsr_behaviour,
                            ctx))
            break;
    }
}

static clib_error_t *
fib_source_show (vlib_main_t * vm,
		 unformat_input_t * input,
		 vlib_cli_command_t * cmd)
{
    fib_source_reg_t *fsr, *fsrs;

    fsrs = vec_dup(fib_source_regs);

    while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
    {
	if (unformat (input, "prio")   ||
	    unformat (input, "priority"))
            vec_sort_with_function(fsrs, fib_source_reg_cmp_for_sort);
    }
    vec_foreach(fsr, fsrs)
    {
        vlib_cli_output(vm, "%U", format_fib_source_reg, fsr);
    }
    vec_free(fsrs);

    return (NULL);
}

VLIB_CLI_COMMAND (show_fib_sources, static) = {
    .path = "show fib source",
    .function = fib_source_show,
    .short_help = "show fib source [prio]",
};


void
fib_source_module_init (void)
{
#define _(s,p,b) fib_source_register(s,p,b);
    foreach_fib_source
#undef _
}