/**
* virTypedParamsAddLLong:
* @params: pointer to the array of typed parameters
* @nparams: number of parameters in the @params array
* @maxparams: maximum number of parameters that can be stored in @params
* array without allocating more memory
* @name: name of the parameter to find
* @value: the value to store into the new parameter
*
* Adds new parameter called @name with long long int type and sets its value
* to @value. If @params array points to NULL or to a space that is not large
* enough to accommodate the new parameter (@maxparams < @nparams + 1), the
* function allocates more space for it and updates @maxparams. On success,
* @nparams is incremented by one. The function fails with VIR_ERR_INVALID_ARG
* error if the parameter already exists in @params.
*
* Returns 0 on success, -1 on error.
*/
int
virTypedParamsAddLLong(virTypedParameterPtr *params,
int *nparams,
int *maxparams,
const char *name,
long long value)
{
size_t max = *maxparams;
size_t n = *nparams;
virResetLastError();
if (VIR_RESIZE_N(*params, max, n, 1) < 0)
goto error;
*maxparams = max;
if (virTypedParameterAssign(*params + n, name,
VIR_TYPED_PARAM_LLONG, value) < 0)
goto error;
*nparams += 1;
return 0;
error:
virDispatchError(NULL);
return -1;
}
/**
* virTypedParamsFilter:
* @params: array of typed parameters
* @nparams: number of parameters in the @params array
* @name: name of the parameter to find
* @ret: pointer to the returned array
*
* Filters @params retaining only the parameters named @name in the
* resulting array @ret. Caller should free the @ret array but not
* the items since they are pointing to the @params elements.
*
* Returns amount of elements in @ret on success, -1 on error.
*/
int
virTypedParamsFilter(virTypedParameterPtr params,
int nparams,
const char *name,
virTypedParameterPtr **ret)
{
size_t i, alloc = 0, n = 0;
virCheckNonNullArgGoto(params, error);
virCheckNonNullArgGoto(name, error);
virCheckNonNullArgGoto(ret, error);
*ret = NULL;
for (i = 0; i < nparams; i++) {
if (STREQ(params[i].field, name)) {
if (VIR_RESIZE_N(*ret, alloc, n, 1) < 0)
goto error;
(*ret)[n] = ¶ms[i];
n++;
}
}
return n;
error:
return -1;
}
/*
* Add a NULL terminated list of args
*/
void
virCommandAddArgList(virCommandPtr cmd, ...)
{
va_list list;
int narg = 0;
if (!cmd || cmd->has_error)
return;
va_start(list, cmd);
while (va_arg(list, const char *) != NULL)
narg++;
va_end(list);
/* narg plus trailing NULL. */
if (VIR_RESIZE_N(cmd->args, cmd->maxargs, cmd->nargs, narg + 1) < 0) {
cmd->has_error = ENOMEM;
return;
}
va_start(list, cmd);
while (1) {
char *arg = va_arg(list, char *);
if (!arg)
break;
arg = strdup(arg);
if (!arg) {
cmd->has_error = ENOMEM;
va_end(list);
return;
}
cmd->args[cmd->nargs++] = arg;
}
va_end(list);
}
/**
* virCapabilitiesAddGuestFeature:
* @guest: guest to associate feature with
* @name: name of feature ('pae', 'acpi', 'apic')
* @defaultOn: non-zero if it defaults to on
* @toggle: non-zero if its state can be toggled
*
* Registers a feature for a guest domain
*/
virCapsGuestFeaturePtr
virCapabilitiesAddGuestFeature(virCapsGuestPtr guest,
const char *name,
int defaultOn,
int toggle)
{
virCapsGuestFeaturePtr feature;
if (VIR_ALLOC(feature) < 0)
goto no_memory;
if ((feature->name = strdup(name)) == NULL)
goto no_memory;
feature->defaultOn = defaultOn;
feature->toggle = toggle;
if (VIR_RESIZE_N(guest->features, guest->nfeatures_max,
guest->nfeatures, 1) < 0)
goto no_memory;
guest->features[guest->nfeatures++] = feature;
return feature;
no_memory:
virCapabilitiesFreeGuestFeature(feature);
return NULL;
}
/**
* virCapabilitiesAddHostNUMACell:
* @caps: capabilities to extend
* @num: ID number of NUMA cell
* @mem: Total size of memory in the NUMA node (in KiB)
* @ncpus: number of CPUs in cell
* @cpus: array of CPU definition structures, the pointer is stolen
* @nsiblings: number of sibling NUMA nodes
* @siblings: info on sibling NUMA nodes
* @npageinfo: number of pages at node @num
* @pageinfo: info on each single memory page
*
* Registers a new NUMA cell for a host, passing in a
* array of CPU IDs belonging to the cell
*/
int
virCapabilitiesAddHostNUMACell(virCapsPtr caps,
int num,
unsigned long long mem,
int ncpus,
virCapsHostNUMACellCPUPtr cpus,
int nsiblings,
virCapsHostNUMACellSiblingInfoPtr siblings,
int npageinfo,
virCapsHostNUMACellPageInfoPtr pageinfo)
{
virCapsHostNUMACellPtr cell;
if (VIR_RESIZE_N(caps->host.numaCell, caps->host.nnumaCell_max,
caps->host.nnumaCell, 1) < 0)
return -1;
if (VIR_ALLOC(cell) < 0)
return -1;
cell->num = num;
cell->mem = mem;
cell->ncpus = ncpus;
cell->cpus = cpus;
cell->nsiblings = nsiblings;
cell->siblings = siblings;
cell->npageinfo = npageinfo;
cell->pageinfo = pageinfo;
caps->host.numaCell[caps->host.nnumaCell++] = cell;
return 0;
}
int
virCPUDefAddFeature(virCPUDefPtr def,
const char *name,
int policy)
{
int i;
for (i = 0 ; i < def->nfeatures ; i++) {
if (STREQ(name, def->features[i].name)) {
virCPUReportError(VIR_ERR_INTERNAL_ERROR,
_("CPU feature `%s' specified more than once"), name);
return -1;
}
}
if (VIR_RESIZE_N(def->features, def->nfeatures_max,
def->nfeatures, 1) < 0)
goto no_memory;
if (def->type == VIR_CPU_TYPE_HOST)
policy = -1;
if (!(def->features[def->nfeatures].name = strdup(name)))
goto no_memory;
def->features[def->nfeatures].policy = policy;
def->nfeatures++;
return 0;
no_memory:
virReportOOMError();
return -1;
}
/**
* virTypedParamsAddString:
* @params: pointer to the array of typed parameters
* @nparams: number of parameters in the @params array
* @maxparams: maximum number of parameters that can be stored in @params
* array without allocating more memory
* @name: name of the parameter to find
* @value: the value to store into the new parameter
*
* Adds new parameter called @name with char * type and sets its value to
* @value. The function creates its own copy of @value string, which needs to
* be freed using virTypedParamsFree or virTypedParamsClear. If @params array
* points to NULL or to a space that is not large enough to accommodate the
* new parameter (@maxparams < @nparams + 1), the function allocates more
* space for it and updates @maxparams. On success, @nparams is incremented
* by one. The function fails with VIR_ERR_INVALID_ARG error if the parameter
* already exists in @params.
*
* Returns 0 on success, -1 on error.
*/
int
virTypedParamsAddString(virTypedParameterPtr *params,
int *nparams,
int *maxparams,
const char *name,
const char *value)
{
char *str = NULL;
size_t max = *maxparams;
size_t n = *nparams;
virResetLastError();
if (VIR_RESIZE_N(*params, max, n, 1) < 0)
goto error;
*maxparams = max;
if (VIR_STRDUP(str, value) < 0)
goto error;
if (virTypedParameterAssign(*params + n, name,
VIR_TYPED_PARAM_STRING, str) < 0) {
VIR_FREE(str);
goto error;
}
*nparams += 1;
return 0;
error:
virDispatchError(NULL);
return -1;
}
/*
* Add a NULL terminated list of args
*/
void
virCommandAddArgSet(virCommandPtr cmd, const char *const*vals)
{
int narg = 0;
if (!cmd || cmd->has_error)
return;
if (vals[0] == NULL) {
cmd->has_error = EINVAL;
return;
}
while (vals[narg] != NULL)
narg++;
/* narg plus trailing NULL. */
if (VIR_RESIZE_N(cmd->args, cmd->maxargs, cmd->nargs, narg + 1) < 0) {
cmd->has_error = ENOMEM;
return;
}
narg = 0;
while (vals[narg] != NULL) {
char *arg = strdup(vals[narg++]);
if (!arg) {
cmd->has_error = ENOMEM;
return;
}
cmd->args[cmd->nargs++] = arg;
}
}
/**
* virTypedParamsAddFromString:
* @params: pointer to the array of typed parameters
* @nparams: number of parameters in the @params array
* @maxparams: maximum number of parameters that can be stored in @params
* array without allocating more memory
* @name: name of the parameter to find
* @type: type of the parameter
* @value: the value to store into the new parameter encoded as a string
*
* Adds new parameter called @name with the requested @type and parses its
* value from the @value string. If the requested type is string, the function
* creates its own copy of the @value string, which needs to be freed using
* virTypedParamsFree or virTypedParamsClear. If @params array points to NULL
* or to a space that is not large enough to accommodate the new parameter
* (@maxparams < @nparams + 1), the function allocates more space for it and
* updates @maxparams. On success, @nparams is incremented by one. The
* function fails with VIR_ERR_INVALID_ARG error if the parameter already
* exists in @params.
*
* Returns 0 on success, -1 on error.
*/
int
virTypedParamsAddFromString(virTypedParameterPtr *params,
int *nparams,
int *maxparams,
const char *name,
int type,
const char *value)
{
size_t max = *maxparams;
size_t n = *nparams;
virResetLastError();
if (VIR_RESIZE_N(*params, max, n, 1) < 0)
goto error;
*maxparams = max;
if (virTypedParameterAssignFromStr(*params + n, name, type, value) < 0)
goto error;
*nparams += 1;
return 0;
error:
virDispatchError(NULL);
return -1;
}
/**
* virCapabilitiesAddHostNUMACell:
* @caps: capabilities to extend
* @num: ID number of NUMA cell
* @ncpus: number of CPUs in cell
* @mem: Total size of memory in the NUMA node (in KiB)
* @cpus: array of CPU definition structures, the pointer is stolen
*
* Registers a new NUMA cell for a host, passing in a
* array of CPU IDs belonging to the cell
*/
int
virCapabilitiesAddHostNUMACell(virCapsPtr caps,
int num,
int ncpus,
unsigned long long mem,
virCapsHostNUMACellCPUPtr cpus)
{
virCapsHostNUMACellPtr cell;
if (VIR_RESIZE_N(caps->host.numaCell, caps->host.nnumaCell_max,
caps->host.nnumaCell, 1) < 0)
return -1;
if (VIR_ALLOC(cell) < 0)
return -1;
cell->ncpus = ncpus;
cell->num = num;
cell->mem = mem;
cell->cpus = cpus;
caps->host.numaCell[caps->host.nnumaCell++] = cell;
return 0;
}
/*
* Add a command line argument created by a printf-style format
*/
void
virCommandAddArgFormat(virCommandPtr cmd, const char *format, ...)
{
char *arg;
va_list list;
if (!cmd || cmd->has_error)
return;
va_start(list, format);
if (virVasprintf(&arg, format, list) < 0) {
cmd->has_error = ENOMEM;
va_end(list);
return;
}
va_end(list);
/* Arg plus trailing NULL. */
if (VIR_RESIZE_N(cmd->args, cmd->maxargs, cmd->nargs, 1 + 1) < 0) {
VIR_FREE(arg);
cmd->has_error = ENOMEM;
return;
}
cmd->args[cmd->nargs++] = arg;
}
/**
* virCapabilitiesAddGuestDomain:
* @guest: guest to support
* @hvtype: hypervisor type ('xen', 'qemu', 'kvm')
* @emulator: specialized device emulator for domain
* @loader: specialized BIOS loader for domain
* @nmachines: number of machine variants for emulator
* @machines: specialized machine variants for emulator
*
* Registers a virtual domain capable of running a
* guest operating system
*/
virCapsGuestDomainPtr
virCapabilitiesAddGuestDomain(virCapsGuestPtr guest,
const char *hvtype,
const char *emulator,
const char *loader,
int nmachines,
virCapsGuestMachinePtr *machines)
{
virCapsGuestDomainPtr dom;
if (VIR_ALLOC(dom) < 0)
goto error;
if (VIR_STRDUP(dom->type, hvtype) < 0 ||
VIR_STRDUP(dom->info.emulator, emulator) < 0 ||
VIR_STRDUP(dom->info.loader, loader) < 0)
goto error;
if (VIR_RESIZE_N(guest->arch.domains, guest->arch.ndomains_max,
guest->arch.ndomains, 1) < 0)
goto error;
guest->arch.domains[guest->arch.ndomains] = dom;
guest->arch.ndomains++;
if (nmachines) {
dom->info.nmachines = nmachines;
dom->info.machines = machines;
}
return dom;
error:
virCapabilitiesFreeGuestDomain(dom);
return NULL;
}
/**
* virCapabilitiesAddHostNUMACell:
* @caps: capabilities to extend
* @num: ID number of NUMA cell
* @ncpus: number of CPUs in cell
* @cpus: array of CPU ID numbers for cell
*
* Registers a new NUMA cell for a host, passing in a
* array of CPU IDs belonging to the cell
*/
int
virCapabilitiesAddHostNUMACell(virCapsPtr caps,
int num,
int ncpus,
const int *cpus)
{
virCapsHostNUMACellPtr cell;
if (VIR_RESIZE_N(caps->host.numaCell, caps->host.nnumaCell_max,
caps->host.nnumaCell, 1) < 0)
return -1;
if (VIR_ALLOC(cell) < 0)
return -1;
if (VIR_ALLOC_N(cell->cpus, ncpus) < 0) {
VIR_FREE(cell);
return -1;
}
memcpy(cell->cpus,
cpus,
ncpus * sizeof(*cpus));
cell->ncpus = ncpus;
cell->num = num;
caps->host.numaCell[caps->host.nnumaCell++] = cell;
return 0;
}
/**
* virNetlinkEventAddClient:
*
* @handleCB: callback to invoke when an event occurs
* @removeCB: callback to invoke when removing a client
* @opaque: user data to pass to callback
* @macaddr: macaddr to store with the data. Used to identify callers.
* May be null.
*
* register a callback for handling of netlink messages. The
* registered function receives the entire netlink message and
* may choose to act upon it.
*
* Returns -1 if the file handle cannot be registered, number of
* monitor upon success.
*/
int
virNetlinkEventAddClient(virNetlinkEventHandleCallback handleCB,
virNetlinkEventRemoveCallback removeCB,
void *opaque, const unsigned char *macaddr)
{
int i, r, ret = -1;
virNetlinkEventSrvPrivatePtr srv = server;
if (handleCB == NULL) {
netlinkError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Invalid NULL callback provided"));
return -1;
}
virNetlinkEventServerLock(srv);
VIR_DEBUG("adding client: %d.", nextWatch);
r = 0;
/* first try to re-use deleted free slots */
for (i = 0; i < srv->handlesCount; i++) {
if (srv->handles[i].deleted == VIR_NETLINK_HANDLE_DELETED) {
r = i;
goto addentry;
}
}
/* Resize the eventLoop array if needed */
if (srv->handlesCount == srv->handlesAlloc) {
VIR_DEBUG("Used %zu handle slots, adding at least %d more",
srv->handlesAlloc, NETLINK_EVENT_ALLOC_EXTENT);
if (VIR_RESIZE_N(srv->handles, srv->handlesAlloc,
srv->handlesCount, NETLINK_EVENT_ALLOC_EXTENT) < 0) {
virReportOOMError();
goto error;
}
}
r = srv->handlesCount++;
addentry:
srv->handles[r].watch = nextWatch;
srv->handles[r].handleCB = handleCB;
srv->handles[r].removeCB = removeCB;
srv->handles[r].opaque = opaque;
srv->handles[r].deleted = VIR_NETLINK_HANDLE_VALID;
if (macaddr)
memcpy(srv->handles[r].macaddr, macaddr, VIR_MAC_BUFLEN);
else
memset(srv->handles[r].macaddr, 0, VIR_MAC_BUFLEN);
VIR_DEBUG("added client to loop slot: %d. with macaddr ptr=%p", r, macaddr);
ret = nextWatch++;
error:
virNetlinkEventServerUnlock(srv);
return ret;
}
/**
* virNetlinkEventAddClient:
*
* @handleCB: callback to invoke when an event occurs
* @removeCB: callback to invoke when removing a client
* @opaque: user data to pass to callback
* @macaddr: macaddr to store with the data. Used to identify callers.
* May be null.
* @protocol: netlink protocol
*
* register a callback for handling of netlink messages. The
* registered function receives the entire netlink message and
* may choose to act upon it.
*
* Returns -1 if the file handle cannot be registered, number of
* monitor upon success.
*/
int
virNetlinkEventAddClient(virNetlinkEventHandleCallback handleCB,
virNetlinkEventRemoveCallback removeCB,
void *opaque, const virMacAddrPtr macaddr,
unsigned int protocol)
{
int i, r, ret = -1;
virNetlinkEventSrvPrivatePtr srv = NULL;
if (protocol >= MAX_LINKS)
return -EINVAL;
srv = server[protocol];
if (handleCB == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Invalid NULL callback provided"));
return -1;
}
virNetlinkEventServerLock(srv);
VIR_DEBUG("adding client: %d.", nextWatch);
r = 0;
/* first try to re-use deleted free slots */
for (i = 0; i < srv->handlesCount; i++) {
if (srv->handles[i].deleted == VIR_NETLINK_HANDLE_DELETED) {
r = i;
goto addentry;
}
}
/* Resize the eventLoop array if needed */
if (srv->handlesCount == srv->handlesAlloc) {
VIR_DEBUG("Used %zu handle slots, adding at least %d more",
srv->handlesAlloc, NETLINK_EVENT_ALLOC_EXTENT);
if (VIR_RESIZE_N(srv->handles, srv->handlesAlloc,
srv->handlesCount, NETLINK_EVENT_ALLOC_EXTENT) < 0) {
virReportOOMError();
goto error;
}
}
r = srv->handlesCount++;
addentry:
srv->handles[r].watch = nextWatch;
srv->handles[r].handleCB = handleCB;
srv->handles[r].removeCB = removeCB;
srv->handles[r].opaque = opaque;
srv->handles[r].deleted = VIR_NETLINK_HANDLE_VALID;
if (macaddr)
virMacAddrSet(&srv->handles[r].macaddr, macaddr);
else
virMacAddrSetRaw(&srv->handles[r].macaddr,
(unsigned char[VIR_MAC_BUFLEN]){0,0,0,0,0,0});
int
virDomainCapsCPUModelsAddSteal(virDomainCapsCPUModelsPtr cpuModels,
char **name,
virDomainCapsCPUUsable usable)
{
if (VIR_RESIZE_N(cpuModels->models, cpuModels->nmodels_max,
cpuModels->nmodels, 1) < 0)
return -1;
cpuModels->models[cpuModels->nmodels].usable = usable;
VIR_STEAL_PTR(cpuModels->models[cpuModels->nmodels].name, *name);
cpuModels->nmodels++;
return 0;
}
/**
* virCapabilitiesAddHostFeature:
* @caps: capabilities to extend
* @name: name of new feature
*
* Registers a new host CPU feature, eg 'pae', or 'vmx'
*/
int
virCapabilitiesAddHostFeature(virCapsPtr caps,
const char *name)
{
if (VIR_RESIZE_N(caps->host.features, caps->host.nfeatures_max,
caps->host.nfeatures, 1) < 0)
return -1;
if (VIR_STRDUP(caps->host.features[caps->host.nfeatures], name) < 0)
return -1;
caps->host.nfeatures++;
return 0;
}
/**
* virCapabilitiesAddHostFeature:
* @caps: capabilities to extend
* @name: name of new feature
*
* Registers a new host CPU feature, eg 'pae', or 'vmx'
*/
int
virCapabilitiesAddHostFeature(virCapsPtr caps,
const char *name)
{
if (VIR_RESIZE_N(caps->host.features, caps->host.nfeatures_max,
caps->host.nfeatures, 1) < 0)
return -1;
if ((caps->host.features[caps->host.nfeatures] = strdup(name)) == NULL)
return -1;
caps->host.nfeatures++;
return 0;
}
/**
* virCapabilitiesAddHostMigrateTransport:
* @caps: capabilities to extend
* @name: name of migration transport
*
* Registers a new domain migration transport URI
*/
int
virCapabilitiesAddHostMigrateTransport(virCapsPtr caps,
const char *name)
{
if (VIR_RESIZE_N(caps->host.migrateTrans, caps->host.nmigrateTrans_max,
caps->host.nmigrateTrans, 1) < 0)
return -1;
if ((caps->host.migrateTrans[caps->host.nmigrateTrans] = strdup(name)) == NULL)
return -1;
caps->host.nmigrateTrans++;
return 0;
}
/**
* virBitmapExpand:
* @map: Pointer to bitmap
* @b: bit position to include in bitmap
*
* Resizes the bitmap so that bit @b will fit into it. This shall be called only
* if @b would not fit into the map.
*
* Returns 0 on success, -1 on error.
*/
static int virBitmapExpand(virBitmapPtr map, size_t b)
{
size_t new_len = VIR_DIV_UP(b, VIR_BITMAP_BITS_PER_UNIT);
/* resize the memory if necessary */
if (map->map_len < new_len) {
if (VIR_RESIZE_N(map->map, map->map_alloc, map->map_len,
new_len - map->map_len) < 0)
return -1;
}
map->max_bit = b + 1;
map->map_len = new_len;
return 0;
}
/**
* virCapabilitiesAddGuest:
* @caps: capabilities to extend
* @ostype: guest operating system type ('hvm' or 'xen')
* @arch: guest CPU architecture ('i686', or 'x86_64', etc)
* @wordsize: number of bits in CPU word
* @emulator: path to default device emulator for arch/ostype
* @loader: path to default BIOS loader for arch/ostype
* @nmachines: number of machine variants for emulator
* @machines: machine variants for emulator ('pc', or 'isapc', etc)
*
* Registers a new guest operating system. This should be
* followed by registration of at least one domain for
* running the guest
*/
virCapsGuestPtr
virCapabilitiesAddGuest(virCapsPtr caps,
const char *ostype,
const char *arch,
int wordsize,
const char *emulator,
const char *loader,
int nmachines,
virCapsGuestMachinePtr *machines)
{
virCapsGuestPtr guest;
if (VIR_ALLOC(guest) < 0)
goto no_memory;
if ((guest->ostype = strdup(ostype)) == NULL)
goto no_memory;
if ((guest->arch.name = strdup(arch)) == NULL)
goto no_memory;
guest->arch.wordsize = wordsize;
if (emulator &&
(guest->arch.defaultInfo.emulator = strdup(emulator)) == NULL)
goto no_memory;
if (loader &&
(guest->arch.defaultInfo.loader = strdup(loader)) == NULL)
goto no_memory;
if (VIR_RESIZE_N(caps->guests, caps->nguests_max,
caps->nguests, 1) < 0)
goto no_memory;
caps->guests[caps->nguests++] = guest;
if (nmachines) {
guest->arch.defaultInfo.nmachines = nmachines;
guest->arch.defaultInfo.machines = machines;
}
return guest;
no_memory:
virCapabilitiesFreeGuest(guest);
return NULL;
}
/*
* Convert a buffer containing preformatted name=value into an
* environment variable of the child.
* Correctly transfers memory errors or contents from buf to cmd.
*/
void
virCommandAddEnvBuffer(virCommandPtr cmd, virBufferPtr buf)
{
if (!cmd || cmd->has_error) {
virBufferFreeAndReset(buf);
return;
}
/* env plus trailing NULL. */
if (virBufferError(buf) ||
VIR_RESIZE_N(cmd->env, cmd->maxenv, cmd->nenv, 1 + 1) < 0) {
cmd->has_error = ENOMEM;
virBufferFreeAndReset(buf);
return;
}
cmd->env[cmd->nenv++] = virBufferContentAndReset(buf);
}
/*
* Convert a buffer into a command line argument to the child.
* Correctly transfers memory errors or contents from buf to cmd.
*/
void
virCommandAddArgBuffer(virCommandPtr cmd, virBufferPtr buf)
{
if (!cmd || cmd->has_error) {
virBufferFreeAndReset(buf);
return;
}
/* Arg plus trailing NULL. */
if (virBufferError(buf) ||
VIR_RESIZE_N(cmd->args, cmd->maxargs, cmd->nargs, 1 + 1) < 0) {
cmd->has_error = ENOMEM;
virBufferFreeAndReset(buf);
return;
}
cmd->args[cmd->nargs++] = virBufferContentAndReset(buf);
}
/*
* Register a callback for a timer event
* NB, it *must* be safe to call this from within a callback
* For this reason we only ever append to existing list.
*/
int virEventPollAddTimeout(int frequency,
virEventTimeoutCallback cb,
void *opaque,
virFreeCallback ff)
{
unsigned long long now;
int ret;
if (virTimeMillisNow(&now) < 0) {
return -1;
}
virMutexLock(&eventLoop.lock);
if (eventLoop.timeoutsCount == eventLoop.timeoutsAlloc) {
EVENT_DEBUG("Used %zu timeout slots, adding at least %d more",
eventLoop.timeoutsAlloc, EVENT_ALLOC_EXTENT);
if (VIR_RESIZE_N(eventLoop.timeouts, eventLoop.timeoutsAlloc,
eventLoop.timeoutsCount, EVENT_ALLOC_EXTENT) < 0) {
virMutexUnlock(&eventLoop.lock);
return -1;
}
}
eventLoop.timeouts[eventLoop.timeoutsCount].timer = nextTimer++;
eventLoop.timeouts[eventLoop.timeoutsCount].frequency = frequency;
eventLoop.timeouts[eventLoop.timeoutsCount].cb = cb;
eventLoop.timeouts[eventLoop.timeoutsCount].ff = ff;
eventLoop.timeouts[eventLoop.timeoutsCount].opaque = opaque;
eventLoop.timeouts[eventLoop.timeoutsCount].deleted = 0;
eventLoop.timeouts[eventLoop.timeoutsCount].expiresAt =
frequency >= 0 ? frequency + now : 0;
eventLoop.timeoutsCount++;
ret = nextTimer-1;
virEventPollInterruptLocked();
PROBE(EVENT_POLL_ADD_TIMEOUT,
"timer=%d frequency=%d cb=%p opaque=%p ff=%p",
ret, frequency, cb, opaque, ff);
virMutexUnlock(&eventLoop.lock);
return ret;
}
/*
* Set LC_ALL to C, and propagate other essential environment
* variables from the parent process.
*/
void
virCommandAddEnvPassCommon(virCommandPtr cmd)
{
if (!cmd || cmd->has_error)
return;
/* Attempt to Pre-allocate; allocation failure will be detected
* later during virCommandAdd*. */
ignore_value(VIR_RESIZE_N(cmd->env, cmd->maxenv, cmd->nenv, 9));
virCommandAddEnvPair(cmd, "LC_ALL", "C");
virCommandAddEnvPass(cmd, "LD_PRELOAD");
virCommandAddEnvPass(cmd, "LD_LIBRARY_PATH");
virCommandAddEnvPass(cmd, "PATH");
virCommandAddEnvPass(cmd, "HOME");
virCommandAddEnvPass(cmd, "USER");
virCommandAddEnvPass(cmd, "LOGNAME");
virCommandAddEnvPass(cmd, "TMPDIR");
}
/**
* virCapabilitiesAddGuestDomain:
* @guest: guest to support
* @hvtype: hypervisor type ('xen', 'qemu', 'kvm')
* @emulator: specialized device emulator for domain
* @loader: specialized BIOS loader for domain
* @nmachines: number of machine variants for emulator
* @machines: specialized machine variants for emulator
*
* Registers a virtual domain capable of running a
* guest operating system
*/
virCapsGuestDomainPtr
virCapabilitiesAddGuestDomain(virCapsGuestPtr guest,
const char *hvtype,
const char *emulator,
const char *loader,
int nmachines,
virCapsGuestMachinePtr *machines)
{
virCapsGuestDomainPtr dom;
if (VIR_ALLOC(dom) < 0)
goto no_memory;
if ((dom->type = strdup(hvtype)) == NULL)
goto no_memory;
if (emulator &&
(dom->info.emulator = strdup(emulator)) == NULL)
goto no_memory;
if (loader &&
(dom->info.loader = strdup(loader)) == NULL)
goto no_memory;
if (VIR_RESIZE_N(guest->arch.domains, guest->arch.ndomains_max,
guest->arch.ndomains, 1) < 0)
goto no_memory;
guest->arch.domains[guest->arch.ndomains] = dom;
guest->arch.ndomains++;
if (nmachines) {
dom->info.nmachines = nmachines;
dom->info.machines = machines;
}
return dom;
no_memory:
virCapabilitiesFreeGuestDomain(dom);
return NULL;
}
/**
* virCapabilitiesAddGuest:
* @caps: capabilities to extend
* @ostype: guest operating system type ('hvm' or 'xen')
* @arch: guest CPU architecture
* @wordsize: number of bits in CPU word
* @emulator: path to default device emulator for arch/ostype
* @loader: path to default BIOS loader for arch/ostype
* @nmachines: number of machine variants for emulator
* @machines: machine variants for emulator ('pc', or 'isapc', etc)
*
* Registers a new guest operating system. This should be
* followed by registration of at least one domain for
* running the guest
*/
virCapsGuestPtr
virCapabilitiesAddGuest(virCapsPtr caps,
const char *ostype,
virArch arch,
const char *emulator,
const char *loader,
int nmachines,
virCapsGuestMachinePtr *machines)
{
virCapsGuestPtr guest;
if (VIR_ALLOC(guest) < 0)
goto error;
if (VIR_STRDUP(guest->ostype, ostype) < 0)
goto error;
guest->arch.id = arch;
guest->arch.wordsize = virArchGetWordSize(arch);
if (VIR_STRDUP(guest->arch.defaultInfo.emulator, emulator) < 0 ||
VIR_STRDUP(guest->arch.defaultInfo.loader, loader) < 0)
goto error;
if (VIR_RESIZE_N(caps->guests, caps->nguests_max,
caps->nguests, 1) < 0)
goto error;
caps->guests[caps->nguests++] = guest;
if (nmachines) {
guest->arch.defaultInfo.nmachines = nmachines;
guest->arch.defaultInfo.machines = machines;
}
return guest;
error:
virCapabilitiesFreeGuest(guest);
return NULL;
}
/*
* Add an environment variable to the child
* using separate name & value strings
*/
void
virCommandAddEnvPair(virCommandPtr cmd, const char *name, const char *value)
{
char *env;
if (!cmd || cmd->has_error)
return;
if (virAsprintf(&env, "%s=%s", name, value ? value : "") < 0) {
cmd->has_error = ENOMEM;
return;
}
/* env plus trailing NULL */
if (VIR_RESIZE_N(cmd->env, cmd->maxenv, cmd->nenv, 1 + 1) < 0) {
VIR_FREE(env);
cmd->has_error = ENOMEM;
return;
}
cmd->env[cmd->nenv++] = env;
}
/*
* Add a command line argument to the child
*/
void
virCommandAddArg(virCommandPtr cmd, const char *val)
{
char *arg;
if (!cmd || cmd->has_error)
return;
if (!(arg = strdup(val))) {
cmd->has_error = ENOMEM;
return;
}
/* Arg plus trailing NULL. */
if (VIR_RESIZE_N(cmd->args, cmd->maxargs, cmd->nargs, 1 + 1) < 0) {
VIR_FREE(arg);
cmd->has_error = ENOMEM;
return;
}
cmd->args[cmd->nargs++] = arg;
}
/*
* Add an environment variable to the child
* using a preformatted env string FOO=BAR
*/
void
virCommandAddEnvString(virCommandPtr cmd, const char *str)
{
char *env;
if (!cmd || cmd->has_error)
return;
if (!(env = strdup(str))) {
cmd->has_error = ENOMEM;
return;
}
/* env plus trailing NULL */
if (VIR_RESIZE_N(cmd->env, cmd->maxenv, cmd->nenv, 1 + 1) < 0) {
VIR_FREE(env);
cmd->has_error = ENOMEM;
return;
}
cmd->env[cmd->nenv++] = env;
}
