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MINOR: buffer: replace bi_del() and bo_del() with b_del()

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Till now the callers had to know which one to call for specific use cases.
Let's fuse them now since a single one will remain after the API migration.
Given that bi_del() may only be used where o==0, just combine the two tests
by first removing output data then only input.
This commit is contained in:
Willy Tarreau 2018-06-15 10:28:05 +02:00
parent a1f78fb652
commit e5f12ce7f2
4 changed files with 36 additions and 40 deletions
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17
include/common/buf.h
View File

@ -415,6 +415,23 @@ static inline void b_set_data(struct buffer *b, size_t len)
}
}
/* b_del() : skips <del> bytes in a buffer <b>. Covers both the output and the
* input parts so it's up to the caller to know where it plays and that <del>
* is always smaller than the amount of data in the buffer.
*/
static inline void b_del(struct buffer *b, size_t del)
{
if (del <= b->o) {
b->o -= del;
del = 0;
}
if (del) {
b->p = b_peek(b, del);
b->i -= del;
del = 0;
}
}
/* b_realign_if_empty() : realigns a buffer if it's empty */
static inline void b_realign_if_empty(struct buffer *b)
{

22
include/common/buffer.h
View File

@ -85,26 +85,6 @@ static inline unsigned int b_to_end(const struct buffer *b)
return b->data + b->size - b->p;
}
/* Skips <del> bytes in a one-way buffer <b> : <p> advances by <del>, <i>
* shrinks by <del> as well, and <o> is left untouched (supposed to be zero).
* The caller is responsible for ensuring that <del> is always smaller than or
* equal to b->i.
*/
static inline void bi_del(struct buffer *b, unsigned int del)
{
b->i -= del;
b->p = b_ptr(b, del);
}
/* Skips <del> bytes from the output of buffer <b> by simply shrinking <o>.
* The caller is responsible for ensuring that <del> is always smaller than or
* equal to b->o.
*/
static inline void bo_del(struct buffer *b, unsigned int del)
{
b->o -= del;
}
/* Return the buffer's length in bytes by summing the input and the output */
static inline int buffer_len(const struct buffer *buf)
{
@ -560,7 +540,7 @@ static inline int bi_eat(struct buffer *b, const struct ist ist)
{
int ret = b_isteq(b, 0, b->i, ist);
if (ret > 0)
bi_del(b, ret);
b_del(b, ret);
return ret;
}

3
include/proto/channel.h
View File

@ -727,8 +727,7 @@ static inline void channel_slow_realign(struct channel *chn, char *swap)
*/
static inline void co_skip(struct channel *chn, int len)
{
chn->buf->o -= len;
b_del(chn->buf, len);
if (buffer_empty(chn->buf))
chn->buf->p = chn->buf->data;

34
src/mux_h2.c
View File

@ -571,7 +571,7 @@ static __maybe_unused int h2_peek_frame_hdr(const struct buffer *b, struct h2_fh
*/
static inline __maybe_unused void h2_skip_frame_hdr(struct buffer *b)
{
bi_del(b, 9);
b_del(b, 9);
}
/* same as above, automatically advances the buffer on success */
@ -760,7 +760,7 @@ static int h2c_frt_recv_preface(struct h2c *h2c)
ret2 = h2c_snd_settings(h2c);
if (ret2 > 0)
bi_del(h2c->dbuf, ret1);
b_del(h2c->dbuf, ret1);
return ret2;
}
@ -1899,7 +1899,7 @@ static void h2_process_demux(struct h2c *h2c)
*/
if (unlikely(h2c->last_sid >= 0) && h2c->dsi > h2c->last_sid) {
ret = MIN(h2c->dbuf->i, h2c->dfl);
bi_del(h2c->dbuf, ret);
b_del(h2c->dbuf, ret);
h2c->dfl -= ret;
ret = h2c->dfl == 0;
goto strm_err;
@ -1979,7 +1979,7 @@ static void h2_process_demux(struct h2c *h2c)
* we reach the end.
*/
ret = MIN(h2c->dbuf->i, h2c->dfl);
bi_del(h2c->dbuf, ret);
b_del(h2c->dbuf, ret);
h2c->dfl -= ret;
ret = h2c->dfl == 0;
}
@ -1997,7 +1997,7 @@ static void h2_process_demux(struct h2c *h2c)
break;
if (h2c->st0 != H2_CS_FRAME_H) {
bi_del(h2c->dbuf, h2c->dfl);
b_del(h2c->dbuf, h2c->dfl);
h2c->st0 = H2_CS_FRAME_H;
}
}
@ -2728,7 +2728,7 @@ static int h2_frt_decode_headers(struct h2s *h2s, struct buffer *buf, int count)
}
/* now consume the input data */
bi_del(h2c->dbuf, h2c->dfl);
b_del(h2c->dbuf, h2c->dfl);
h2c->st0 = H2_CS_FRAME_H;
buf->i += outlen;
@ -2788,7 +2788,7 @@ static int h2_frt_transfer_data(struct h2s *h2s, struct buffer *buf, int count)
}
/* skip the padlen byte */
bi_del(h2c->dbuf, 1);
b_del(h2c->dbuf, 1);
h2c->dfl--;
h2c->rcvd_c++; h2c->rcvd_s++;
h2c->dff &= ~H2_F_DATA_PADDED;
@ -2857,7 +2857,7 @@ static int h2_frt_transfer_data(struct h2s *h2s, struct buffer *buf, int count)
/* now mark the input data as consumed (will be deleted from the buffer
* by the caller when seeing FRAME_A after sending the window update).
*/
bi_del(h2c->dbuf, flen);
b_del(h2c->dbuf, flen);
h2c->dfl -= flen;
h2c->rcvd_c += flen;
h2c->rcvd_s += flen; // warning, this can also affect the closed streams!
@ -3075,7 +3075,7 @@ static int h2s_frt_make_resp_headers(struct h2s *h2s, struct buffer *buf)
outbuf.str[4] |= H2_F_HEADERS_END_STREAM;
/* consume incoming H1 response */
bo_del(buf, ret);
b_del(buf, ret);
/* commit the H2 response */
h2c->mbuf->o += outbuf.len;
@ -3087,7 +3087,7 @@ static int h2s_frt_make_resp_headers(struct h2s *h2s, struct buffer *buf)
*/
if (es_now) {
// trim any possibly pending data (eg: inconsistent content-length)
bo_del(buf, buf->o);
b_del(buf, buf->o);
h1m->state = HTTP_MSG_DONE;
h2s->flags |= H2_SF_ES_SENT;
@ -3189,7 +3189,7 @@ static int h2s_frt_make_resp_data(struct h2s *h2s, struct buffer *buf)
h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
goto end;
}
bo_del(buf, ret);
b_del(buf, ret);
total += ret;
h1m->state = HTTP_MSG_CHUNK_SIZE;
}
@ -3211,7 +3211,7 @@ static int h2s_frt_make_resp_data(struct h2s *h2s, struct buffer *buf)
size = chunk;
h1m->curr_len = chunk;
h1m->body_len += chunk;
bo_del(buf, ret);
b_del(buf, ret);
total += ret;
h1m->state = size ? HTTP_MSG_DATA : HTTP_MSG_TRAILERS;
if (!size)
@ -3328,7 +3328,7 @@ static int h2s_frt_make_resp_data(struct h2s *h2s, struct buffer *buf)
/* consume incoming H1 response */
if (size > 0) {
bo_del(buf, size);
b_del(buf, size);
total += size;
h1m->curr_len -= size;
h2s->mws -= size;
@ -3348,7 +3348,7 @@ static int h2s_frt_make_resp_data(struct h2s *h2s, struct buffer *buf)
if (!(h1m->flags & H1_MF_CHNK)) {
// trim any possibly pending data (eg: inconsistent content-length)
bo_del(buf, buf->o);
b_del(buf, buf->o);
h1m->state = HTTP_MSG_DONE;
}
@ -3399,10 +3399,10 @@ static int h2_snd_buf(struct conn_stream *cs, struct buffer *buf, int flags)
break;
}
total += count;
bo_del(buf, count);
b_del(buf, count);
// trim any possibly pending data (eg: extra CR-LF, ...)
bo_del(buf, buf->o);
b_del(buf, buf->o);
h2s->res.state = HTTP_MSG_DONE;
break;
@ -3417,7 +3417,7 @@ static int h2_snd_buf(struct conn_stream *cs, struct buffer *buf, int flags)
/* trim any possibly pending data after we close (extra CR-LF,
* unprocessed trailers, abnormal extra data, ...)
*/
bo_del(buf, buf->o);
b_del(buf, buf->o);
}
/* RST are sent similarly to frame acks */