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app/testpmd: support flow bit-field

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Several rte_flow structures expose bit-fields that cannot be set in a
generic fashion at byte level. Add bit-mask support to handle them.

Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
Acked-by: Olga Shern <olgas@mellanox.com>
This commit is contained in:
Adrien Mazarguil 2016-12-21 15:51:32 +01:00 committed by Thomas Monjalon
parent d3f61b7bad
commit 00d78f550f
1 changed files with 70 additions and 0 deletions
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70
app/test-pmd/cmdline_flow.c
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@ -136,6 +136,7 @@ struct arg {
uint32_t sign:1; /**< Value is signed. */
uint32_t offset; /**< Relative offset from ctx->object. */
uint32_t size; /**< Field size. */
const uint8_t *mask; /**< Bit-mask to use instead of offset/size. */
};
/** Parser token definition. */
@ -195,6 +196,13 @@ struct token {
.size = sizeof(((s *)0)->f), \
})
/** Static initializer for ARGS() to target a bit-field. */
#define ARGS_ENTRY_BF(s, f, b) \
(&(const struct arg){ \
.size = sizeof(s), \
.mask = (const void *)&(const s){ .f = (1 << (b)) - 1 }, \
})
/** Static initializer for ARGS() to target a pointer. */
#define ARGS_ENTRY_PTR(s, f) \
(&(const struct arg){ \
@ -623,6 +631,45 @@ push_args(struct context *ctx, const struct arg *arg)
return 0;
}
/** Spread value into buffer according to bit-mask. */
static size_t
arg_entry_bf_fill(void *dst, uintmax_t val, const struct arg *arg)
{
uint32_t i = arg->size;
uint32_t end = 0;
int sub = 1;
int add = 0;
size_t len = 0;
if (!arg->mask)
return 0;
#if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
if (!arg->hton) {
i = 0;
end = arg->size;
sub = 0;
add = 1;
}
#endif
while (i != end) {
unsigned int shift = 0;
uint8_t *buf = (uint8_t *)dst + arg->offset + (i -= sub);
for (shift = 0; arg->mask[i] >> shift; ++shift) {
if (!(arg->mask[i] & (1 << shift)))
continue;
++len;
if (!dst)
continue;
*buf &= ~(1 << shift);
*buf |= (val & 1) << shift;
val >>= 1;
}
i += add;
}
return len;
}
/**
* Parse a prefix length and generate a bit-mask.
*
@ -649,6 +696,23 @@ parse_prefix(struct context *ctx, const struct token *token,
u = strtoumax(str, &end, 0);
if (errno || (size_t)(end - str) != len)
goto error;
if (arg->mask) {
uintmax_t v = 0;
extra = arg_entry_bf_fill(NULL, 0, arg);
if (u > extra)
goto error;
if (!ctx->object)
return len;
extra -= u;
while (u--)
(v <<= 1, v |= 1);
v <<= extra;
if (!arg_entry_bf_fill(ctx->object, v, arg) ||
!arg_entry_bf_fill(ctx->objmask, -1, arg))
goto error;
return len;
}
bytes = u / 8;
extra = u % 8;
size = arg->size;
@ -1072,6 +1136,12 @@ parse_int(struct context *ctx, const struct token *token,
goto error;
if (!ctx->object)
return len;
if (arg->mask) {
if (!arg_entry_bf_fill(ctx->object, u, arg) ||
!arg_entry_bf_fill(ctx->objmask, -1, arg))
goto error;
return len;
}
buf = (uint8_t *)ctx->object + arg->offset;
size = arg->size;
objmask: