/*
* Open a handle to a disk. This will fail if the device cannot be opened, or
* if no suitable transport exists for communicating with the device.
*/
int
disk_status_open(disk_status_t *dsp, const char *path, int *error)
{
ds_transport_t *t;
int i;
if ((dsp->ds_fd = open(path, O_RDWR)) < 0) {
*error = EDS_CANT_OPEN;
free(dsp);
printf("Disk Module: DISK Open failed.\n");
return (-1);
}
if ((dsp->ds_path = strdup(path)) == NULL) {
*error = EDS_NOMEM;
disk_status_close(dsp);
return (-1);
}
for (i = 0; i < NTRANSPORTS; i++) {
t = ds_transports[i];
dsp->ds_transport = t;
if ((dsp->ds_data = t->dt_open(dsp)) == NULL) {
if (dsp->ds_error != EDS_NO_TRANSPORT) {
*error = dsp->ds_error;
disk_status_close(dsp);
return (-1);
}
} else {
dsp->ds_error = 0;
break;
}
}
if (dsp->ds_error == EDS_NO_TRANSPORT) {
*error = dsp->ds_error;
disk_status_close(dsp);
return (-1);
}
return (0);
}
/*
* Query the current disk status. If successful, the disk status is returned
* as an nvlist consisting of at least the following members:
*
* protocol string Supported protocol (currently "scsi")
*
* status nvlist Arbitrary protocol-specific information
* about the current state of the disk.
*
* faults nvlist A list of supported faults. Each
* element of this list is a boolean value.
* An element's existence indicates that
* the drive supports detecting this fault,
* and the value indicates the current
* state of the fault.
*
* <fault-name> nvlist For each fault named in 'faults', a
* nvlist describing protocol-specific
* attributes of the fault.
*
* This method relies on the libdiskstatus library to query this information.
*/
static int
disk_status(topo_mod_t *mod, tnode_t *nodep, topo_version_t vers,
nvlist_t *in_nvl, nvlist_t **out_nvl)
{
disk_status_t *dsp;
char *devpath, *fullpath;
size_t pathlen;
nvlist_t *status;
int err;
*out_nvl = NULL;
if (vers != TOPO_METH_DISK_STATUS_VERSION)
return (topo_mod_seterrno(mod, EMOD_VER_NEW));
/*
* If the caller specifies the "path" parameter, then this indicates
* that we should use this instead of deriving it from the topo node
* itself.
*/
if (nvlist_lookup_string(in_nvl, "path", &fullpath) == 0) {
devpath = NULL;
} else {
/*
* Get the /devices path and attempt to open the disk status
* handle.
*/
if (topo_prop_get_string(nodep, TOPO_PGROUP_IO,
TOPO_IO_DEV_PATH, &devpath, &err) != 0)
return (topo_mod_seterrno(mod, EMOD_METHOD_NOTSUP));
/*
* Note that sizeof(string) includes the terminating NULL byte
*/
pathlen = strlen(devpath) + sizeof ("/devices") +
sizeof (PHYS_EXTN) - 1;
if ((fullpath = topo_mod_alloc(mod, pathlen)) == NULL)
return (topo_mod_seterrno(mod, EMOD_NOMEM));
(void) snprintf(fullpath, pathlen, "/devices%s%s", devpath,
PHYS_EXTN);
topo_mod_strfree(mod, devpath);
}
if ((dsp = disk_status_open(fullpath, &err)) == NULL) {
if (devpath)
topo_mod_free(mod, fullpath, pathlen);
return (topo_mod_seterrno(mod, err == EDS_NOMEM ?
EMOD_NOMEM : EMOD_METHOD_NOTSUP));
}
if (devpath)
topo_mod_free(mod, fullpath, pathlen);
if ((status = disk_status_get(dsp)) == NULL) {
err = (disk_status_errno(dsp) == EDS_NOMEM ?
EMOD_NOMEM : EMOD_METHOD_NOTSUP);
disk_status_close(dsp);
return (topo_mod_seterrno(mod, err));
}
*out_nvl = status;
disk_status_close(dsp);
return (0);
}
