Re: [libvirt] [PATCH] virNumaGetHugePageInfo: Return page_avail and page_free as ULL

https://bugzilla.redhat.com/show_bug.cgi?id=1569678 On some large systems (with ~400GB of RAM) it is possible for unsigned int to overflow in which case we report invalid number of 4K pages pool size. Switch to unsigned long long.

Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- src/conf/capabilities.c | 5 +++-- src/conf/capabilities.h | 2 +- src/util/virhostmem.c | 2 +- src/util/virnuma.c | 32 ++++++++++++++++++-------------- src/util/virnuma.h | 8 ++++---- tests/virnumamock.c | 4 ++-- 6 files changed, 29 insertions(+), 24 deletions(-) diff --git a/src/conf/capabilities.c b/src/conf/capabilities.c index c4ee7efb5f..dd2fc77f91 100644 --- a/src/conf/capabilities.c +++ b/src/conf/capabilities.c @@ -816,7 +816,7 @@ virCapabilitiesFormatNUMATopology(virBufferPtr buf, cells[i]->mem); for (j = 0; j < cells[i]->npageinfo; j++) { - virBufferAsprintf(buf, "<pages unit='KiB' size='%u'>%zu</pages>\n", + virBufferAsprintf(buf, "<pages unit='KiB' size='%u'>%llu</pages>\n", cells[i]->pageinfo[j].size, cells[i]->pageinfo[j].avail); } @@ -1351,7 +1351,8 @@ virCapabilitiesGetNUMAPagesInfo(int node, int *npageinfo) { int ret = -1; - unsigned int *pages_size = NULL, *pages_avail = NULL; + unsigned int *pages_size = NULL; + unsigned long long *pages_avail = NULL; size_t npages, i; if (virNumaGetPages(node, &pages_size, &pages_avail, NULL, &npages) < 0) diff --git a/src/conf/capabilities.h b/src/conf/capabilities.h index 694a3590bf..f0a06a24df 100644 --- a/src/conf/capabilities.h +++ b/src/conf/capabilities.h @@ -107,7 +107,7 @@ typedef struct _virCapsHostNUMACellPageInfo virCapsHostNUMACellPageInfo; typedef virCapsHostNUMACellPageInfo *virCapsHostNUMACellPageInfoPtr; struct _virCapsHostNUMACellPageInfo { unsigned int size; /* page size in kibibytes */ - size_t avail; /* the size of pool */ + unsigned long long avail; /* the size of pool */ }; typedef struct _virCapsHostNUMACell virCapsHostNUMACell; diff --git a/src/util/virhostmem.c b/src/util/virhostmem.c index 11efe8c502..c923a1edf5 100644 --- a/src/util/virhostmem.c +++ b/src/util/virhostmem.c @@ -783,7 +783,7 @@ virHostMemGetFreePages(unsigned int npages, for (cell = startCell; cell <= lastCell; cell++) { for (i = 0; i < npages; i++) { unsigned int page_size = pages[i]; - unsigned int page_free; + unsigned long long page_free; if (virNumaGetPageInfo(cell, page_size, 0, NULL, &page_free) < 0) goto cleanup; diff --git a/src/util/virnuma.c b/src/util/virnuma.c index bebe301f8d..784db0a7ce 100644 --- a/src/util/virnuma.c +++ b/src/util/virnuma.c @@ -563,8 +563,8 @@ virNumaGetHugePageInfoDir(char **path, int node) static int virNumaGetHugePageInfo(int node, unsigned int page_size, - unsigned int *page_avail, - unsigned int *page_free) + unsigned long long *page_avail, + unsigned long long *page_free) { int ret = -1; char *path = NULL; @@ -579,7 +579,7 @@ virNumaGetHugePageInfo(int node, if (virFileReadAll(path, 1024, &buf) < 0) goto cleanup; - if (virStrToLong_ui(buf, &end, 10, page_avail) < 0 || + if (virStrToLong_ull(buf, &end, 10, page_avail) < 0 || *end != '\n') { virReportError(VIR_ERR_INTERNAL_ERROR, _("unable to parse: %s"), @@ -598,7 +598,7 @@ virNumaGetHugePageInfo(int node, if (virFileReadAll(path, 1024, &buf) < 0) goto cleanup; - if (virStrToLong_ui(buf, &end, 10, page_free) < 0 || + if (virStrToLong_ull(buf, &end, 10, page_free) < 0 || *end != '\n') { virReportError(VIR_ERR_INTERNAL_ERROR, _("unable to parse: %s"), @@ -645,8 +645,8 @@ int virNumaGetPageInfo(int node, unsigned int page_size, unsigned long long huge_page_sum, - unsigned int *page_avail, - unsigned int *page_free) + unsigned long long *page_avail, + unsigned long long *page_free) { int ret = -1; long system_page_size = virGetSystemPageSize(); @@ -709,8 +709,8 @@ virNumaGetPageInfo(int node, int virNumaGetPages(int node, unsigned int **pages_size, - unsigned int **pages_avail, - unsigned int **pages_free, + unsigned long long **pages_avail, + unsigned long long **pages_free, size_t *npages) { int ret = -1; @@ -718,7 +718,9 @@ virNumaGetPages(int node, DIR *dir = NULL; int direrr = 0; struct dirent *entry; - unsigned int *tmp_size = NULL, *tmp_avail = NULL, *tmp_free = NULL; + unsigned int *tmp_size = NULL; + unsigned long long *tmp_avail = NULL; + unsigned long long *tmp_free = NULL; unsigned int ntmp = 0; size_t i; bool exchange; @@ -744,7 +746,9 @@ virNumaGetPages(int node, while (dir && (direrr = virDirRead(dir, &entry, path)) > 0) { const char *page_name = entry->d_name; - unsigned int page_size, page_avail = 0, page_free = 0; + unsigned int page_size; + unsigned long long page_avail = 0; + unsigned long long page_free = 0; char *end; /* Just to give you a hint, we're dealing with this: @@ -934,8 +938,8 @@ int virNumaGetPageInfo(int node ATTRIBUTE_UNUSED, unsigned int page_size ATTRIBUTE_UNUSED, unsigned long long huge_page_sum ATTRIBUTE_UNUSED, - unsigned int *page_avail ATTRIBUTE_UNUSED, - unsigned int *page_free ATTRIBUTE_UNUSED) + unsigned long long *page_avail ATTRIBUTE_UNUSED, + unsigned long long *page_free ATTRIBUTE_UNUSED) { virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s", _("page info is not supported on this platform")); @@ -946,8 +950,8 @@ virNumaGetPageInfo(int node ATTRIBUTE_UNUSED, int virNumaGetPages(int node ATTRIBUTE_UNUSED, unsigned int **pages_size ATTRIBUTE_UNUSED, - unsigned int **pages_avail ATTRIBUTE_UNUSED, - unsigned int **pages_free ATTRIBUTE_UNUSED, + unsigned long long **pages_avail ATTRIBUTE_UNUSED, + unsigned long long **pages_free ATTRIBUTE_UNUSED, size_t *npages ATTRIBUTE_UNUSED) { virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s", diff --git a/src/util/virnuma.h b/src/util/virnuma.h index e4e1fd0b97..a3ffb6d6c7 100644 --- a/src/util/virnuma.h +++ b/src/util/virnuma.h @@ -52,12 +52,12 @@ int virNumaGetNodeCPUs(int node, virBitmapPtr *cpus) ATTRIBUTE_NOINLINE; int virNumaGetPageInfo(int node, unsigned int page_size, unsigned long long huge_page_sum, - unsigned int *page_avail, - unsigned int *page_free); + unsigned long long *page_avail, + unsigned long long *page_free); int virNumaGetPages(int node, unsigned int **pages_size, - unsigned int **pages_avail, - unsigned int **pages_free, + unsigned long long **pages_avail, + unsigned long long **pages_free, size_t *npages) ATTRIBUTE_NONNULL(5) ATTRIBUTE_NOINLINE; int virNumaSetPagePoolSize(int node, diff --git a/tests/virnumamock.c b/tests/virnumamock.c index d8f90b81b3..475efc1f34 100644 --- a/tests/virnumamock.c +++ b/tests/virnumamock.c @@ -125,8 +125,8 @@ virNumaGetDistances(int node ATTRIBUTE_UNUSED, int virNumaGetPages(int node, unsigned int **pages_size, - unsigned int **pages_avail, - unsigned int **pages_free, + unsigned long long **pages_avail, + unsigned long long **pages_free, size_t *npages) { const int pages_def[] = { 4, 2 * 1024, 1 * 1024 * 1024};