Merge tag 'migration-20240621-pull-request' of https://gitlab.com/farosas/qemu into staging

Migration pull request

- Fabiano's fix for fdset + file migration truncating the migration
  file

- Fabiano's fdset + direct-io support for mapped-ram

- Peter's various cleanups (multifd sync, thread names, migration
  states, tests)

- Peter's new migration state postcopy-recover-setup

- Philippe's unused vmstate macro cleanup

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# gpg: Good signature from "Fabiano Rosas <farosas@suse.de>" [unknown]
# gpg:                 aka "Fabiano Almeida Rosas <fabiano.rosas@suse.com>" [unknown]
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# Primary key fingerprint: AA1B 48B0 A223 26A5 A4C3  64CF C798 DC74 1BEC 319D

* tag 'migration-20240621-pull-request' of https://gitlab.com/farosas/qemu: (28 commits)
  migration: Remove unused VMSTATE_ARRAY_TEST() macro
  tests/migration-tests: Cover postcopy failure on reconnect
  tests/migration-tests: Verify postcopy-recover-setup status
  tests/migration-tests: migration_event_wait()
  tests/migration-tests: Always enable migration events
  tests/migration-tests: Drop most WIN32 ifdefs for postcopy failure tests
  migration/docs: Update postcopy recover session for SETUP phase
  migration/postcopy: Add postcopy-recover-setup phase
  migration: Cleanup incoming migration setup state change
  migration: Use MigrationStatus instead of int
  migration: Rename thread debug names
  migration/multifd: Avoid the final FLUSH in complete()
  tests/qtest/migration: Add a test for mapped-ram with passing of fds
  migration: Add documentation for fdset with multifd + file
  monitor: fdset: Match against O_DIRECT
  tests/qtest/migration: Add tests for file migration with direct-io
  migration/multifd: Add direct-io support
  migration: Add direct-io parameter
  io: Stop using qemu_open_old in channel-file
  monitor: Report errors from monitor_fdset_dup_fd_add
  ...

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

1 files changed, 11 insertions, 23 deletions

diff --git a/util/osdep.c b/util/osdep.c
index 5d23bbfbec..770369831b 100644
--- a/util/osdep.c
+++ b/util/osdep.c
@@ -282,6 +282,15 @@ int qemu_lock_fd_test(int fd, int64_t start, int64_t len, bool exclusive)
 }
 #endif
 
+bool qemu_has_direct_io(void)
+{
+#ifdef O_DIRECT
+    return true;
+#else
+    return false;
+#endif
+}
+
 static int qemu_open_cloexec(const char *name, int flags, mode_t mode)
 {
     int ret;
@@ -310,7 +319,6 @@ qemu_open_internal(const char *name, int flags, mode_t mode, Error **errp)
     /* Attempt dup of fd from fd set */
     if (strstart(name, "/dev/fdset/", &fdset_id_str)) {
         int64_t fdset_id;
-        int dupfd;
 
         fdset_id = qemu_parse_fdset(fdset_id_str);
         if (fdset_id == -1) {
@@ -319,14 +327,7 @@ qemu_open_internal(const char *name, int flags, mode_t mode, Error **errp)
             return -1;
         }
 
-        dupfd = monitor_fdset_dup_fd_add(fdset_id, flags);
-        if (dupfd == -1) {
-            error_setg_errno(errp, errno, "Could not dup FD for %s flags %x",
-                             name, flags);
-            return -1;
-        }
-
-        return dupfd;
+        return monitor_fdset_dup_fd_add(fdset_id, flags, errp);
     }
 #endif
 
@@ -398,21 +399,8 @@ int qemu_open_old(const char *name, int flags, ...)
 
 int qemu_close(int fd)
 {
-    int64_t fdset_id;
-
     /* Close fd that was dup'd from an fdset */
-    fdset_id = monitor_fdset_dup_fd_find(fd);
-    if (fdset_id != -1) {
-        int ret;
-
-        ret = close(fd);
-        if (ret == 0) {
-            monitor_fdset_dup_fd_remove(fd);
-        }
-
-        return ret;
-    }
-
+    monitor_fdset_dup_fd_remove(fd);
     return close(fd);
 }