Merge remote-tracking branch 'remotes/berrange/tags/block-odirect-pull-request' into staging

block: improve error reporting for unsupported O_DIRECT

# gpg: Signature made Wed 16 Sep 2020 10:45:48 BST
# gpg:                using RSA key DAF3A6FDB26B62912D0E8E3FBE86EBB415104FDF
# gpg: Good signature from "Daniel P. Berrange <dan@berrange.com>" [full]
# gpg:                 aka "Daniel P. Berrange <berrange@redhat.com>" [full]
# Primary key fingerprint: DAF3 A6FD B26B 6291 2D0E  8E3F BE86 EBB4 1510 4FDF

* remotes/berrange/tags/block-odirect-pull-request:
  block/file: switch to use qemu_open/qemu_create for improved errors
  util: give a specific error message when O_DIRECT doesn't work
  util: introduce qemu_open and qemu_create with error reporting
  util: add Error object for qemu_open_internal error reporting
  util: refactor qemu_open_old to split off variadic args handling
  util: rename qemu_open() to qemu_open_old()
  util: split off a helper for dealing with O_CLOEXEC flag
  monitor: simplify functions for getting a dup'd fdset entry

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 9 insertions, 3 deletions

diff --git a/include/monitor/monitor.h b/include/monitor/monitor.h
index 1018d754a6..c0170773d4 100644
--- a/include/monitor/monitor.h
+++ b/include/monitor/monitor.h
@@ -43,8 +43,7 @@ int monitor_read_password(MonitorHMP *mon, ReadLineFunc *readline_func,
 AddfdInfo *monitor_fdset_add_fd(int fd, bool has_fdset_id, int64_t fdset_id,
                                 bool has_opaque, const char *opaque,
                                 Error **errp);
-int monitor_fdset_get_fd(int64_t fdset_id, int flags);
-int monitor_fdset_dup_fd_add(int64_t fdset_id, int dup_fd);
+int monitor_fdset_dup_fd_add(int64_t fdset_id, int flags);
 void monitor_fdset_dup_fd_remove(int dup_fd);
 int64_t monitor_fdset_dup_fd_find(int dup_fd);
 
diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index 412962d91a..577d9e8315 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -497,10 +497,17 @@ int qemu_madvise(void *addr, size_t len, int advice);
 int qemu_mprotect_rwx(void *addr, size_t size);
 int qemu_mprotect_none(void *addr, size_t size);
 
-int qemu_open(const char *name, int flags, ...);
+/*
+ * Don't introduce new usage of this function, prefer the following
+ * qemu_open/qemu_create that take an "Error **errp"
+ */
+int qemu_open_old(const char *name, int flags, ...);
+int qemu_open(const char *name, int flags, Error **errp);
+int qemu_create(const char *name, int flags, mode_t mode, Error **errp);
 int qemu_close(int fd);
 int qemu_unlink(const char *name);
 #ifndef _WIN32
+int qemu_dup_flags(int fd, int flags);
 int qemu_dup(int fd);
 #endif
 int qemu_lock_fd(int fd, int64_t start, int64_t len, bool exclusive);