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#include "swap.h"
#include "common/sysctl.h"
#include <vm/vm_param.h>
#include <sys/stat.h>
#include <sys/param.h>
static void addSwapEntry(FFlist* result, struct xswdev* xsw, uint32_t pageSize) {
if (xsw->xsw_nblks == 0) { // DFBSD reports some /dev/wdog devices with nblks == 0
return;
}
FFSwapResult* swap = FF_LIST_ADD(FFSwapResult, *result);
if (xsw->xsw_dev == NODEV) {
ffStrbufInitStatic(&swap->name, "[NFS]");
} else {
ffStrbufInitF(&swap->name, "/dev/%s", devname(xsw->xsw_dev, S_IFCHR));
}
swap->bytesUsed = (uint64_t) xsw->xsw_used * pageSize;
swap->bytesTotal = (uint64_t) xsw->xsw_nblks * pageSize;
}
#if __DragonFly__
const char* ffDetectSwap(FFlist* result) {
struct xswdev xsws[32];
size_t size = sizeof(xsws);
if (sysctlbyname("vm.swap_info_array", xsws, &size, NULL, 0) < 0) {
return "sysctlbyname(\"vm.swap_info_array\") failed";
}
uint32_t pageSize = instance.state.platform.sysinfo.pageSize;
size_t count = size / sizeof(struct xswdev);
if (count == 0) {
return NULL;
}
if (xsws->xsw_version != XSWDEV_VERSION) {
return "xswdev version mismatch";
}
for (uint32_t i = 0; i < count; ++i) {
addSwapEntry(result, &xsws[i], pageSize);
}
return NULL;
}
#elif __FreeBSD__
const char* ffDetectSwap(FFlist* result) {
int mib[16];
size_t mibsize = ARRAY_SIZE(mib);
if (sysctlnametomib("vm.swap_info", mib, &mibsize) < 0) {
return "sysctlnametomib(\"vm.swap_info\") failed";
}
uint32_t pageSize = instance.state.platform.sysinfo.pageSize;
for (int n = 0;; ++n) {
mib[mibsize] = n;
struct xswdev xsw;
size_t size = sizeof(xsw);
if (sysctl(mib, (uint32_t) (mibsize + 1), &xsw, &size, NULL, 0) < 0) {
break;
}
if (xsw.xsw_version != XSWDEV_VERSION) {
return "xswdev version mismatch";
}
addSwapEntry(result, &xsw, pageSize);
}
return NULL;
}
#endif
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