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1998-07-24 21:29  Ulrich Drepper  <drepper@cygnus.com>

	* nscd/connections.c (pw_send_answer): Make one single writev call.
	(gr_send_answer): Do the work in two writev calls.  This change
	changes the protocol.

	* nscd/nscd_getgr_r.c (__nscd_getgr_r): Adjust for protocol change.
	We now can do the job using two readv calls.
This commit is contained in:
Ulrich Drepper 1998-07-24 21:32:39 +00:00
parent 6c202c6870
commit 264d5b944d
3 changed files with 149 additions and 109 deletions
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9
ChangeLog
View File

@ -1,3 +1,12 @@
1998-07-24 21:29 Ulrich Drepper <drepper@cygnus.com>
* nscd/connections.c (pw_send_answer): Make one single writev call.
(gr_send_answer): Do the work in two writev calls. This change
changes the protocol.
* nscd/nscd_getgr_r.c (__nscd_getgr_r): Adjust for protocol change.
We now can do the job using two readv calls.
1998-07-24 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/generic/glob.c (glob): Fix problems with handle tilde.

140
nscd/connections.c
View File

@ -320,7 +320,10 @@ init_sockets (void)
void
pw_send_answer (int conn, struct passwd *pwd)
{
struct iovec vec[6];
pw_response_header resp;
size_t total_len;
int nblocks;
resp.version = NSCD_VERSION;
if (pwd != NULL)
@ -352,40 +355,42 @@ pw_send_answer (int conn, struct passwd *pwd)
return;
}
/* Send response header. */
if (write (sock[conn], &resp, sizeof (pw_response_header)) !=
sizeof (pw_response_header))
{
dbg_log (_("write incomplete on send response: %s"), strerror (errno));
return;
}
/* Add response header. */
vec[0].iov_base = &resp;
vec[0].iov_len = sizeof (pw_response_header);
total_len = sizeof (pw_response_header);
nblocks = 1;
if (resp.found)
{
struct iovec vec[5];
/* Add pw_name. */
vec[1].iov_base = pwd->pw_name;
vec[1].iov_len = resp.pw_name_len;
total_len += resp.pw_name_len;
/* Add pw_passwd. */
vec[2].iov_base = pwd->pw_passwd;
vec[2].iov_len = resp.pw_passwd_len;
total_len += resp.pw_passwd_len;
/* Add pw_gecos. */
vec[3].iov_base = pwd->pw_gecos;
vec[3].iov_len = resp.pw_gecos_len;
total_len += resp.pw_gecos_len;
/* Add pw_dir. */
vec[4].iov_base = pwd->pw_dir;
vec[4].iov_len = resp.pw_dir_len;
total_len += resp.pw_dir_len;
/* Add pw_shell. */
vec[5].iov_base = pwd->pw_shell;
vec[5].iov_len = resp.pw_shell_len;
total_len += resp.pw_shell_len;
/* Send pw_name. */
vec[0].iov_base = pwd->pw_name;
vec[0].iov_len = resp.pw_name_len;
/* Send pw_passwd. */
vec[1].iov_base = pwd->pw_passwd;
vec[1].iov_len = resp.pw_passwd_len;
/* Send pw_gecos. */
vec[2].iov_base = pwd->pw_gecos;
vec[2].iov_len = resp.pw_gecos_len;
/* Send pw_dir. */
vec[3].iov_base = pwd->pw_dir;
vec[3].iov_len = resp.pw_dir_len;
/* Send pw_shell. */
vec[4].iov_base = pwd->pw_shell;
vec[4].iov_len = resp.pw_shell_len;
if (writev (sock[conn], vec, 5) != (resp.pw_name_len + resp.pw_passwd_len
+ resp.pw_gecos_len + resp.pw_dir_len
+ resp.pw_shell_len))
dbg_log (_("write incomplete on send passwd answer: %s"),
strerror (errno));
nblocks = 6;
}
/* Send all the data. */
if (writev (sock[conn], vec, nblocks) != total_len)
dbg_log (_("write incomplete on send passwd answer: %s"),
strerror (errno));
}
void
@ -419,7 +424,11 @@ pw_send_disabled (int conn)
void
gr_send_answer (int conn, struct group *grp)
{
struct iovec *vec;
size_t *len;
gr_response_header resp;
size_t total_len;
int nblocks;
resp.version = NSCD_VERSION;
if (grp != NULL)
@ -447,54 +456,55 @@ gr_send_answer (int conn, struct group *grp)
return;
}
/* Send response header. */
if (write (sock[conn], &resp, sizeof (gr_response_header))
!= sizeof (gr_response_header))
{
dbg_log (_("write incomplete on send response: %s"), strerror (errno));
return;
}
/* We have no fixed number of records so allocate the IOV here. */
vec = alloca ((3 + 1 + resp.gr_mem_len) * sizeof (struct iovec));
len = alloca (resp.gr_mem_len * sizeof (size_t));
/* Add response header. */
vec[0].iov_base = &resp;
vec[0].iov_len = sizeof (gr_response_header);
total_len = sizeof (gr_response_header);
nblocks = 1;
if (resp.found)
{
unsigned int l = 0;
/* Send gr_name. */
if (write (sock[conn], grp->gr_name, resp.gr_name_len)
!= resp.gr_name_len)
{
dbg_log (_("write incomplete on send response: %s"),
strerror (errno));
return;
}
/* Send gr_passwd. */
if (write (sock[conn], grp->gr_passwd, resp.gr_passwd_len)
!= resp.gr_passwd_len)
{
dbg_log (_("write incomplete on send response: %s"),
strerror (errno));
return;
}
/* Add gr_name. */
vec[1].iov_base = grp->gr_name;
vec[1].iov_len = resp.gr_name_len;
total_len += resp.gr_name_len;
/* Add gr_passwd. */
vec[2].iov_base = grp->gr_passwd;
vec[2].iov_len = resp.gr_passwd_len;
total_len += resp.gr_passwd_len;
nblocks = 3;
while (grp->gr_mem[l])
if (grp->gr_mem[l])
{
size_t len = strlen (grp->gr_mem[l]);
vec[3].iov_base = len;
vec[3].iov_len = resp.gr_mem_len * sizeof (size_t);
total_len += resp.gr_mem_len * sizeof (size_t);
nblocks = 4;
if (write (sock[conn], &len, sizeof (len)) != sizeof (len))
do
{
dbg_log (_("write incomplete on send response: %s"),
strerror (errno));
return;
len[l] = strlen (grp->gr_mem[l]);
vec[nblocks].iov_base = grp->gr_mem[l];
vec[nblocks].iov_len = len[l];
total_len += len[l];
++nblocks;
}
if (write (sock[conn], grp->gr_mem[l], len) != len)
{
dbg_log (_("write incomplete on send response: %s"),
strerror (errno));
return;
}
++l;
while (grp->gr_mem[++l]);
}
}
/* Send all the data. */
if (writev (sock[conn], vec, nblocks) != total_len)
dbg_log (_("write incomplete on send group answer: %s"),
strerror (errno));
}
void

107
nscd/nscd_getgr_r.c
View File

@ -24,6 +24,7 @@
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include <sys/un.h>
#include "nscd.h"
@ -139,83 +140,103 @@ __nscd_getgr_r (const char *key, request_type type, struct group *resultbuf,
if (gr_resp.found == 1)
{
size_t i;
struct iovec *vec;
size_t *len;
char *p = buffer;
int nblocks;
size_t total_len;
uintptr_t align;
if (buflen < gr_resp.gr_name_len + 1)
/* A first check whether the buffer is sufficently large is possible. */
if (buflen < gr_resp.gr_name_len + 1 + gr_resp.gr_passwd_len + 1)
{
__set_errno (ERANGE);
__close (sock);
return -1;
}
resultbuf->gr_name = p;
/* Allocate the IOVEC. */
vec = alloca ((2 + gr_resp.gr_mem_len) * sizeof (struct iovec));
len = alloca (gr_resp.gr_mem_len * sizeof (size_t));
vec[0].iov_base = resultbuf->gr_name = p;
vec[0].iov_len = gr_resp.gr_name_len;
total_len = gr_resp.gr_name_len;
p += gr_resp.gr_name_len + 1;
buflen -= (gr_resp.gr_name_len + 1);
nbytes = __read (sock, resultbuf->gr_name, gr_resp.gr_name_len);
if (nbytes != gr_resp.gr_name_len)
{
__close (sock);
return 1;
}
resultbuf->gr_name[gr_resp.gr_name_len] = '\0';
if (buflen < gr_resp.gr_passwd_len + 1)
{
__set_errno (ERANGE);
__close (sock);
return -1;
}
resultbuf->gr_passwd = p;
vec[1].iov_base = resultbuf->gr_passwd = p;
vec[1].iov_len = gr_resp.gr_passwd_len;
total_len += gr_resp.gr_passwd_len;
p += gr_resp.gr_passwd_len + 1;
buflen -= (gr_resp.gr_passwd_len + 1);
nbytes = __read (sock, resultbuf->gr_passwd, gr_resp.gr_passwd_len);
if (nbytes != gr_resp.gr_passwd_len)
buflen -= total_len;
nblocks = 2;
if (gr_resp.gr_mem_len > 0)
{
vec[2].iov_base = len;
vec[2].iov_len = gr_resp.gr_mem_len * sizeof (size_t);
total_len += gr_resp.gr_mem_len * sizeof (size_t);
nblocks = 3;
}
/* Get this data. */
if (__readv (sock, vec, nblocks) != total_len)
{
__close (sock);
return 1;
}
/* Now we know the sizes. First terminate the strings we just read. */
resultbuf->gr_name[gr_resp.gr_name_len] = '\0';
resultbuf->gr_passwd[gr_resp.gr_passwd_len] = '\0';
resultbuf->gr_gid = gr_resp.gr_gid;
if (buflen < ((gr_resp.gr_mem_len + 1) * sizeof (char *)))
/* Now allocate the buffer the array for the group members. We must
align the pointer. */
align = ((__alignof__ (char *) - (p - ((char *) 0)))
& (__alignof__ (char *) - 1));
if (align + (1 + gr_resp.gr_mem_len) * sizeof (char *) > buflen)
{
__set_errno (ERANGE);
__close (sock);
return -1;
}
resultbuf->gr_mem = (char **)p;
p += ((gr_resp.gr_mem_len + 1) * sizeof (char *));
buflen -= ((gr_resp.gr_mem_len + 1) * sizeof (char *));
p += align;
resultbuf->gr_mem = (char **) p;
p += (1 + gr_resp.gr_mem_len) * sizeof (char *);
buflen -= align + (1 + gr_resp.gr_mem_len) * sizeof (char *);
resultbuf->gr_mem[gr_resp.gr_mem_len] = NULL;
for (i = 0; i < gr_resp.gr_mem_len; ++i)
if (gr_resp.gr_mem_len > 0)
{
size_t len;
nbytes = __read (sock, &len, sizeof (len));
if (nbytes != sizeof (len))
/* Prepare reading the group members. */
size_t i;
total_len = 0;
for (i = 0; i < gr_resp.gr_mem_len; ++i)
{
__close (sock);
return 1;
if (len[i] >= buflen)
{
__set_errno (ERANGE);
__close (sock);
return -1;
}
vec[i].iov_base = resultbuf->gr_mem[i] = p;
vec[i].iov_len = len[i];
total_len += len[i];
buflen -= len[i];
p += len[i];
*p++ = '\0';
}
if (buflen < (len + 1))
if (__readv (sock, vec, gr_resp.gr_mem_len) != total_len)
{
__set_errno (ERANGE);
__close (sock);
return -1;
}
resultbuf->gr_mem[i] = p;
p += len + 1;
buflen -= (len + 1);
nbytes = __read (sock, resultbuf->gr_mem[i], len);
resultbuf->gr_mem[i][len] = '\0';
if (nbytes != len)
{
__close (sock);
return 1;
}
}
__close (sock);
return 0;