96 lines
2.6 KiB
Diff
96 lines
2.6 KiB
Diff
From 439a8cdd010dfd253fc2277ae4ec605b5ba621d9 Mon Sep 17 00:00:00 2001
|
|
From: Peter Xu <peterx@redhat.com>
|
|
Date: Wed, 19 Apr 2023 12:17:36 -0400
|
|
Subject: [PATCH 02/56] util/mmap-alloc: qemu_fd_getfs()
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
RH-Author: Peter Xu <peterx@redhat.com>
|
|
RH-MergeRequest: 162: migration: Pretty failures for postcopy on unsupported memory types
|
|
RH-Bugzilla: 2057267
|
|
RH-Acked-by: Leonardo Brás <leobras@redhat.com>
|
|
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
|
|
RH-Acked-by: quintela1 <quintela@redhat.com>
|
|
RH-Commit: [1/50] 8970b5ae611a933d693e0c90cbf4eda073635494 (peterx/qemu-kvm)
|
|
|
|
This new helper fetches file system type for a fd. Only Linux is
|
|
implemented so far. Currently only tmpfs and hugetlbfs are defined,
|
|
but it can grow as needed.
|
|
|
|
Signed-off-by: Peter Xu <peterx@redhat.com>
|
|
Reviewed-by: David Hildenbrand <david@redhat.com>
|
|
Reviewed-by: Juan Quintela <quintela@redhat.com>
|
|
Signed-off-by: Juan Quintela <quintela@redhat.com>
|
|
(cherry picked from commit fa45f8dab9613993c042176ea2d25552bfebc955)
|
|
Signed-off-by: Peter Xu <peterx@redhat.com>
|
|
---
|
|
include/qemu/mmap-alloc.h | 7 +++++++
|
|
util/mmap-alloc.c | 28 ++++++++++++++++++++++++++++
|
|
2 files changed, 35 insertions(+)
|
|
|
|
diff --git a/include/qemu/mmap-alloc.h b/include/qemu/mmap-alloc.h
|
|
index 2825e231a7..8344daaa03 100644
|
|
--- a/include/qemu/mmap-alloc.h
|
|
+++ b/include/qemu/mmap-alloc.h
|
|
@@ -1,8 +1,15 @@
|
|
#ifndef QEMU_MMAP_ALLOC_H
|
|
#define QEMU_MMAP_ALLOC_H
|
|
|
|
+typedef enum {
|
|
+ QEMU_FS_TYPE_UNKNOWN = 0,
|
|
+ QEMU_FS_TYPE_TMPFS,
|
|
+ QEMU_FS_TYPE_HUGETLBFS,
|
|
+ QEMU_FS_TYPE_NUM,
|
|
+} QemuFsType;
|
|
|
|
size_t qemu_fd_getpagesize(int fd);
|
|
+QemuFsType qemu_fd_getfs(int fd);
|
|
|
|
/**
|
|
* qemu_ram_mmap: mmap anonymous memory, the specified file or device.
|
|
diff --git a/util/mmap-alloc.c b/util/mmap-alloc.c
|
|
index 5ed7d29183..ed14f9c64d 100644
|
|
--- a/util/mmap-alloc.c
|
|
+++ b/util/mmap-alloc.c
|
|
@@ -27,8 +27,36 @@
|
|
|
|
#ifdef CONFIG_LINUX
|
|
#include <sys/vfs.h>
|
|
+#include <linux/magic.h>
|
|
#endif
|
|
|
|
+QemuFsType qemu_fd_getfs(int fd)
|
|
+{
|
|
+#ifdef CONFIG_LINUX
|
|
+ struct statfs fs;
|
|
+ int ret;
|
|
+
|
|
+ if (fd < 0) {
|
|
+ return QEMU_FS_TYPE_UNKNOWN;
|
|
+ }
|
|
+
|
|
+ do {
|
|
+ ret = fstatfs(fd, &fs);
|
|
+ } while (ret != 0 && errno == EINTR);
|
|
+
|
|
+ switch (fs.f_type) {
|
|
+ case TMPFS_MAGIC:
|
|
+ return QEMU_FS_TYPE_TMPFS;
|
|
+ case HUGETLBFS_MAGIC:
|
|
+ return QEMU_FS_TYPE_HUGETLBFS;
|
|
+ default:
|
|
+ return QEMU_FS_TYPE_UNKNOWN;
|
|
+ }
|
|
+#else
|
|
+ return QEMU_FS_TYPE_UNKNOWN;
|
|
+#endif
|
|
+}
|
|
+
|
|
size_t qemu_fd_getpagesize(int fd)
|
|
{
|
|
#ifdef CONFIG_LINUX
|
|
--
|
|
2.39.1
|
|
|