Merge tag 'migration-20230420-pull-request' of https://gitlab.com/juan.quintela/qemu into staging

Migration Pull request (take 2)

Remove the two atomic patches that broke mips32.

Please, apply.

# -----BEGIN PGP SIGNATURE-----
#
# iQIzBAABCAAdFiEEGJn/jt6/WMzuA0uC9IfvGFhy1yMFAmRGYTkACgkQ9IfvGFhy
# 1yMD5RAApL8bJTMpmkZ8afxG124/CID7fvg/WMp3vOTG/6923XZHfosUwqrCCvzN
# 8qfSfOl4P5Gtv1dOU+ZBcgoFS3tj00Ud2YhcZiSVUy5LZPJNJEfv4YzIErDTJq3I
# wcv/CgHvK1CKJ5DZ1g9hqnRvw9qYiodDEHS7UxvhGzckFExHps2oWt9nDuEZefKV
# XptOX7YDFYmWE87fp8+rQMYGZEN/6Cc7p4HmSt9I11CgLbeaqTpmKuwTv89PU9qV
# 7/X9kfoHNsKsVKw5WosEdRvEqhVQbvcCCxq+TGpeQz6d5U2mY7RVxQSNJxXNdD3P
# uz7uannx+UhESgzf5GnwOMIcxWD6UMAcDt349IAWFbq5d1QGaXJ9fVVHVJDV1Irl
# XHqxkugNMxRVZ8hQy5gSE6UTpeIjkIpSoZGnGS7E/iLMZHZBgv7s5VK21mYxn/QF
# F9g3Ewo2lF+kpQ/ZEnQ9mFyCYtqOHOAOLAUa7/6WdGnUMuqQ47Fh+jbb+KdEyCLg
# l7yXk2gXAb8SN6957Tlvo9okOB4NzhDPDXgvewAG/1yW4zL9hA+YCMvEvy90N8Be
# rRKO7H9YlsW4wKjA//i2YNAbtaZN5+zeAS39m0exYmXA54AMufjWq/a7Ya/ix5Jo
# 452LEz5hA4ckXXtP715pKQjqafxWXbHSS1qw9LBfMYr5TEEWC6c=
# =JTxg
# -----END PGP SIGNATURE-----
# gpg: Signature made Mon 24 Apr 2023 12:00:09 PM BST
# gpg:                using RSA key 1899FF8EDEBF58CCEE034B82F487EF185872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>" [undefined]
# gpg:                 aka "Juan Quintela <quintela@trasno.org>" [undefined]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03  4B82 F487 EF18 5872 D723

* tag 'migration-20230420-pull-request' of https://gitlab.com/juan.quintela/qemu:
  migration: Pass migrate_caps_check() the old and new caps
  migration: rename enabled_capabilities to capabilities
  migration/postcopy: Detect file system on dest host
  vl.c: Create late backends before migration object
  util/mmap-alloc: qemu_fd_getfs()
  migration: Handle block device inactivation failures better
  migration: Rename normal to normal_pages
  migration: Rename duplicate to zero_pages
  migration: Make postcopy_requests atomic
  migration: Make dirty_sync_count atomic
  migration: Make downtime_bytes atomic
  migration: Make precopy_bytes atomic
  migration: Make dirty_sync_missed_zero_copy atomic
  migration: Make multifd_bytes atomic
  migration: Update atomic stats out of the mutex
  migration: Merge ram_counters and ram_atomic_counters
  migration: remove extra whitespace character for code style

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 28 insertions, 0 deletions

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