From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xiao Guangrong Subject: [PATCH v3 07/32] util: introduce qemu_file_get_page_size() Date: Sun, 11 Oct 2015 11:52:39 +0800 Message-ID: <1444535584-18220-8-git-send-email-guangrong.xiao@linux.intel.com> References: <1444535584-18220-1-git-send-email-guangrong.xiao@linux.intel.com> Cc: gleb@kernel.org, mtosatti@redhat.com, stefanha@redhat.com, mst@redhat.com, rth@twiddle.net, ehabkost@redhat.com, dan.j.williams@intel.com, kvm@vger.kernel.org, qemu-devel@nongnu.org, Xiao Guangrong To: pbonzini@redhat.com, imammedo@redhat.com Return-path: Received: from mga03.intel.com ([134.134.136.65]:7727 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752655AbbJJT6c (ORCPT ); Sat, 10 Oct 2015 15:58:32 -0400 In-Reply-To: <1444535584-18220-1-git-send-email-guangrong.xiao@linux.intel.com> Sender: kvm-owner@vger.kernel.org List-ID: There are three places use the some logic to get the page size on the file path or file fd This patch introduces qemu_file_get_page_size() to unify the code Signed-off-by: Xiao Guangrong --- include/qemu/osdep.h | 1 + target-ppc/kvm.c | 21 +++------------------ util/oslib-posix.c | 16 ++++++++++++++++ util/oslib-win32.c | 5 +++++ 4 files changed, 25 insertions(+), 18 deletions(-) diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h index ef21efb..9c8c0c4 100644 --- a/include/qemu/osdep.h +++ b/include/qemu/osdep.h @@ -286,4 +286,5 @@ void os_mem_prealloc(int fd, char *area, size_t sz); int qemu_read_password(char *buf, int buf_size); +size_t qemu_file_get_page_size(const char *mem_path); #endif diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c index f8ea783..ed3424e 100644 --- a/target-ppc/kvm.c +++ b/target-ppc/kvm.c @@ -306,28 +306,13 @@ static void kvm_get_smmu_info(PowerPCCPU *cpu, struct kvm_ppc_smmu_info *info) static long gethugepagesize(const char *mem_path) { - struct statfs fs; - int ret; - - do { - ret = statfs(mem_path, &fs); - } while (ret != 0 && errno == EINTR); + long size = qemu_file_get_page_size(mem_path); - if (ret != 0) { - fprintf(stderr, "Couldn't statfs() memory path: %s\n", - strerror(errno)); + if (!size) { exit(1); } -#define HUGETLBFS_MAGIC 0x958458f6 - - if (fs.f_type != HUGETLBFS_MAGIC) { - /* Explicit mempath, but it's ordinary pages */ - return getpagesize(); - } - - /* It's hugepage, return the huge page size */ - return fs.f_bsize; + return size; } static int find_max_supported_pagesize(Object *obj, void *opaque) diff --git a/util/oslib-posix.c b/util/oslib-posix.c index a0fcdc2..6b5c612 100644 --- a/util/oslib-posix.c +++ b/util/oslib-posix.c @@ -380,6 +380,22 @@ static size_t fd_getpagesize(int fd) return getpagesize(); } +size_t qemu_file_get_page_size(const char *path) +{ + size_t size = 0; + int fd = qemu_open(path, O_RDONLY); + + if (fd < 0) { + fprintf(stderr, "Could not open %s.\n", path); + goto exit; + } + + size = fd_getpagesize(fd); + qemu_close(fd); +exit: + return size; +} + void os_mem_prealloc(int fd, char *area, size_t memory) { int ret; diff --git a/util/oslib-win32.c b/util/oslib-win32.c index 08f5a9c..1ff1fae 100644 --- a/util/oslib-win32.c +++ b/util/oslib-win32.c @@ -462,6 +462,11 @@ size_t getpagesize(void) return system_info.dwPageSize; } +size_t qemu_file_get_page_size(const char *path) +{ + return getpagesize(); +} + void os_mem_prealloc(int fd, char *area, size_t memory) { int i; -- 1.8.3.1