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VFS: enable sending control messages

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This commit is contained in:
Thomas Veerman 2012-03-30 09:24:44 +00:00
parent 8ae9987dca
commit 0d63d9e125
4 changed files with 78 additions and 2 deletions
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4
common/include/sys/svrctl.h
View file

@ -18,6 +18,10 @@ Created: Feb 15, 1994 by Philip Homburg <philip@cs.vu.nl>
#define PMGETPARAM _IOW('M', 5, struct sysgetenv)
#define PMSETPARAM _IOR('M', 7, struct sysgetenv)
/* VFS controls */
#define VFSSETPARAM _IOR('M', 130, struct sysgetenv)
#define VFSGETPARAM _IOR('M', 131, struct sysgetenv)
struct sysgetenv {
char *key; /* Name requested. */
size_t keylen; /* Length of name including \0. */

1
servers/vfs/glo.h
View file

@ -14,6 +14,7 @@ EXTERN int nr_locks; /* number of locks currently in place */
EXTERN int reviving; /* number of pipe processes to be revived */
EXTERN int pending;
EXTERN int sending;
EXTERN int verbose;
EXTERN dev_t ROOT_DEV; /* device number of the root device */
EXTERN int ROOT_FS_E; /* kernel endpoint of the root FS proc */

1
servers/vfs/main.c
View file

@ -486,6 +486,7 @@ static int sef_cb_init_fresh(int UNUSED(type), sef_init_info_t *info)
force_sync = 0;
receive_from = ANY;
self = NULL;
verbose = 0;
/* Initialize proc endpoints to NONE */
for (rfp = &fproc[0]; rfp < &fproc[NR_PROCS]; rfp++) {

74
servers/vfs/misc.c
View file

@ -595,11 +595,81 @@ int ruid;
int do_svrctl()
{
int svrctl;
vir_bytes ptr;
svrctl = m_in.svrctl_req;
svrctl = job_m_in.svrctl_req;
ptr = (vir_bytes) job_m_in.svrctl_argp;
if (((svrctl >> 8) & 0xFF) != 'M') return(EINVAL);
switch (svrctl) {
/* No control request implemented yet. */
case VFSSETPARAM:
case VFSGETPARAM:
{
struct sysgetenv sysgetenv;
char search_key[64];
char val[64];
int r, s;
/* Copy sysgetenv structure to VFS */
if (sys_datacopy(who_e, ptr, SELF, (vir_bytes) &sysgetenv,
sizeof(sysgetenv)) != OK)
return(EFAULT);
/* Basic sanity checking */
if (svrctl == VFSSETPARAM) {
if (sysgetenv.keylen <= 0 ||
sysgetenv.keylen > (sizeof(search_key) - 1) ||
sysgetenv.vallen <= 0 ||
sysgetenv.vallen >= sizeof(val)) {
return(EINVAL);
}
}
/* Copy parameter "key" */
if ((s = sys_datacopy(who_e, (vir_bytes) sysgetenv.key,
SELF, (vir_bytes) search_key,
sysgetenv.keylen)) != OK)
return(s);
search_key[sysgetenv.keylen] = '\0'; /* Limit string */
/* Is it a parameter we know? */
if (svrctl == VFSSETPARAM) {
if (!strcmp(search_key, "verbose")) {
int verbose_val;
if ((s = sys_datacopy(who_e,
(vir_bytes) sysgetenv.val, SELF,
(vir_bytes) &val, sysgetenv.vallen)) != OK)
return(s);
val[sysgetenv.vallen] = '\0'; /* Limit string */
verbose_val = atoi(val);
if (verbose_val < 0 || verbose_val > 4) {
return(EINVAL);
}
verbose = verbose_val;
r = OK;
} else {
r = ESRCH;
}
} else { /* VFSGETPARAM */
if (!strcmp(search_key, "print_traces")) {
mthread_stacktraces();
sysgetenv.val = 0;
sysgetenv.vallen = 0;
r = OK;
} else {
r = ESRCH;
}
if (r == OK) {
if ((s = sys_datacopy(SELF,
(vir_bytes) &sysgetenv, who_e, ptr,
sizeof(sysgetenv))) != OK)
return(s);
}
}
return(r);
}
default:
return(EINVAL);
}