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Vectored safe copies for inet.

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This commit is contained in:
Philip Homburg 2006-06-26 14:20:11 +00:00
parent 14c9743ecf
commit de07a562d1
1 changed files with 71 additions and 151 deletions
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222
servers/inet/sr.c
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@ -78,6 +78,7 @@ PRIVATE mq_t *repl_queue, *repl_queue_tail;
PRIVATE cpvec_t cpvec[CPVEC_NR];
#else /* Minix 3 */
PRIVATE struct vir_cp_req vir_cp_req[CPVEC_NR];
PRIVATE struct vscp_vec s_cp_req[CPVEC_NR];
#endif
FORWARD _PROTOTYPE ( int sr_open, (message *m) );
@ -1269,186 +1270,80 @@ char *dest;
return OK;
}
#if 0
PRIVATE int cp_u2b_s (proc, src, var_acc_ptr, size)
int proc;
char *src;
acc_t **var_acc_ptr;
int size;
{
static message mess;
acc_t *acc;
int i;
acc= bf_memreq(size);
*var_acc_ptr= acc;
i=0;
while (acc)
{
size= (vir_bytes)acc->acc_length;
#ifdef __minix_vmd
cpvec[i].cpv_src= (vir_bytes)src;
cpvec[i].cpv_dst= (vir_bytes)ptr2acc_data(acc);
cpvec[i].cpv_size= size;
#else /* Minix 3 */
vir_cp_req[i].count= size;
vir_cp_req[i].src.proc_nr_e = proc;
vir_cp_req[i].src.segment = D;
vir_cp_req[i].src.offset = (vir_bytes) src;
vir_cp_req[i].dst.proc_nr_e = this_proc;
vir_cp_req[i].dst.segment = D;
vir_cp_req[i].dst.offset = (vir_bytes) ptr2acc_data(acc);
#endif
src += size;
acc= acc->acc_next;
i++;
if (i == CPVEC_NR || acc == NULL)
{
#ifdef __minix_vmd
mess.m_type= SYS_VCOPY;
mess.m1_i1= proc;
mess.m1_i2= this_proc;
mess.m1_i3= i;
mess.m1_p1= (char *)cpvec;
#else /* Minix 3 */
mess.m_type= SYS_VIRVCOPY;
mess.VCP_VEC_SIZE= i;
mess.VCP_VEC_ADDR= (char *)vir_cp_req;
#endif
if (sendrec(SYSTASK, &mess) <0)
ip_panic(("unable to sendrec"));
if (mess.m_type <0)
{
bf_afree(*var_acc_ptr);
*var_acc_ptr= 0;
return mess.m_type;
}
i= 0;
}
}
return OK;
}
#else
PRIVATE int cp_u2b_s (proc, gid, offset, var_acc_ptr, size)
PRIVATE int cp_u2b_s(proc, gid, offset, var_acc_ptr, size)
int proc;
int gid;
vir_bytes offset;
acc_t **var_acc_ptr;
int size;
{
static message mess;
acc_t *acc;
int r;
int i, r;
acc= bf_memreq(size);
*var_acc_ptr= acc;
while (acc)
{
size= (vir_bytes)acc->acc_length;
r= sys_safecopyfrom(proc, gid,
offset, (vir_bytes)ptr2acc_data(acc),
size, D);
if (r != OK)
{
printf("cp_u2b_s: sys_safecopyfrom failed: %d\n",
r);
bf_afree(*var_acc_ptr);
*var_acc_ptr= 0;
return r;
}
offset += size;
acc= acc->acc_next;
}
return OK;
}
#endif
#if 0
PRIVATE int cp_b2u_s(acc_ptr, proc, dest, offset)
acc_t *acc_ptr;
int proc;
char *dest;
vir_bytes offset;
{
static message mess;
acc_t *acc;
int i, size;
acc= acc_ptr;
i=0;
while (acc)
{
size= (vir_bytes)acc->acc_length;
if (size)
{
#ifdef __minix_vmd
cpvec[i].cpv_src= (vir_bytes)ptr2acc_data(acc);
cpvec[i].cpv_dst= (vir_bytes)dest;
cpvec[i].cpv_size= size;
#else /* Minix 3 */
vir_cp_req[i].src.proc_nr_e = this_proc;
vir_cp_req[i].src.segment = D;
vir_cp_req[i].src.offset= (vir_bytes)ptr2acc_data(acc);
vir_cp_req[i].dst.proc_nr_e = proc;
vir_cp_req[i].dst.segment = D;
vir_cp_req[i].dst.offset= (vir_bytes)dest;
vir_cp_req[i].count= size;
#endif
i++;
}
s_cp_req[i].v_from= proc;
s_cp_req[i].v_to= SELF;
s_cp_req[i].v_gid= gid;
s_cp_req[i].v_offset= offset;
s_cp_req[i].v_addr= (vir_bytes) ptr2acc_data(acc);
s_cp_req[i].v_bytes= size;
dest += size;
offset += size;
acc= acc->acc_next;
i++;
if (acc == NULL && i == 1)
{
r= sys_safecopyfrom(s_cp_req[0].v_from,
s_cp_req[0].v_gid, s_cp_req[0].v_offset,
s_cp_req[0].v_addr, s_cp_req[0].v_bytes, D);
if (r <0)
{
printf("sys_safecopyfrom failed: %d\n", r);
bf_afree(*var_acc_ptr);
*var_acc_ptr= 0;
return r;
}
i= 0;
continue;
}
if (i == CPVEC_NR || acc == NULL)
{
#ifdef __minix_vmd
mess.m_type= SYS_VCOPY;
mess.m1_i1= this_proc;
mess.m1_i2= proc;
mess.m1_i3= i;
mess.m1_p1= (char *)cpvec;
#else /* Minix 3 */
mess.m_type= SYS_VIRVCOPY;
mess.VCP_VEC_SIZE= i;
mess.VCP_VEC_ADDR= (char *) vir_cp_req;
#endif
if (sendrec(SYSTASK, &mess) <0)
ip_panic(("unable to sendrec"));
if (mess.m_type <0)
r= sys_vsafecopy(s_cp_req, i);
if (r <0)
{
bf_afree(acc_ptr);
return mess.m_type;
printf("cp_u2b_s: sys_vsafecopy failed: %d\n",
r);
bf_afree(*var_acc_ptr);
*var_acc_ptr= 0;
return r;
}
i= 0;
}
}
bf_afree(acc_ptr);
return OK;
}
#else
PRIVATE int cp_b2u_s(acc_ptr, proc, gid, offset)
acc_t *acc_ptr;
int proc;
int gid;
vir_bytes offset;
{
static message mess;
acc_t *acc;
int r, size;
int i, r, size;
acc= acc_ptr;
i=0;
while (acc)
{
@ -1456,25 +1351,50 @@ vir_bytes offset;
if (size)
{
r= sys_safecopyto(proc, gid,
offset, (vir_bytes)ptr2acc_data(acc),
size, D);
if (r != OK)
s_cp_req[i].v_from= SELF;
s_cp_req[i].v_to= proc;
s_cp_req[i].v_gid= gid;
s_cp_req[i].v_offset= offset;
s_cp_req[i].v_addr= (vir_bytes) ptr2acc_data(acc);
s_cp_req[i].v_bytes= size;
i++;
}
offset += size;
acc= acc->acc_next;
if (acc == NULL && i == 1)
{
r= sys_safecopyto(s_cp_req[0].v_to,
s_cp_req[0].v_gid, s_cp_req[0].v_offset,
s_cp_req[0].v_addr, s_cp_req[0].v_bytes, D);
if (r <0)
{
printf("cp_b2u_s: sys_safecopyto failed: %d\n",
printf("sys_safecopyto failed: %d\n", r);
bf_afree(acc_ptr);
return r;
}
i= 0;
continue;
}
if (i == CPVEC_NR || acc == NULL)
{
r= sys_vsafecopy(s_cp_req, i);
if (r <0)
{
printf("cp_b2u_s: sys_vsafecopy failed: %d\n",
r);
bf_afree(acc_ptr);
return r;
}
offset += size;
i= 0;
}
acc= acc->acc_next;
}
bf_afree(acc_ptr);
return OK;
}
#endif
PRIVATE int sr_repl_queue(proc, ref, operation)
int proc;