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[PATCH v5 5/8] util: add Error object for qemu_open_internal error repor
From: |
Daniel P . Berrangé |
Subject: |
[PATCH v5 5/8] util: add Error object for qemu_open_internal error reporting |
Date: |
Wed, 2 Sep 2020 18:09:10 +0100 |
Instead of relying on the limited information from errno, we can now
also provide detailed error messages to callers that ask for it.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
util/osdep.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/util/osdep.c b/util/osdep.c
index dd34b58bb7..28aa89adc9 100644
--- a/util/osdep.c
+++ b/util/osdep.c
@@ -298,7 +298,7 @@ static int qemu_open_cloexec(const char *name, int flags,
mode_t mode)
* Opens a file with FD_CLOEXEC set
*/
static int
-qemu_open_internal(const char *name, int flags, mode_t mode)
+qemu_open_internal(const char *name, int flags, mode_t mode, Error **errp)
{
int ret;
@@ -312,12 +312,15 @@ qemu_open_internal(const char *name, int flags, mode_t
mode)
fdset_id = qemu_parse_fdset(fdset_id_str);
if (fdset_id == -1) {
+ error_setg(errp, "Could not parse fdset %s", name);
errno = EINVAL;
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;
}
@@ -327,6 +330,13 @@ qemu_open_internal(const char *name, int flags, mode_t
mode)
ret = qemu_open_cloexec(name, flags, mode);
+ if (ret == -1) {
+ const char *action = flags & O_CREAT ? "create" : "open";
+ error_setg_errno(errp, errno, "Could not %s '%s'",
+ action, name);
+ }
+
+
return ret;
}
@@ -343,7 +353,7 @@ int qemu_open_old(const char *name, int flags, ...)
}
va_end(ap);
- ret = qemu_open_internal(name, flags, mode);
+ ret = qemu_open_internal(name, flags, mode, NULL);
#ifdef O_DIRECT
if (ret == -1 && errno == EINVAL && (flags & O_DIRECT)) {
--
2.26.2
- [PATCH v5 0/8] block: improve error reporting for unsupported O_DIRECT, Daniel P . Berrangé, 2020/09/02
- [PATCH v5 1/8] monitor: simplify functions for getting a dup'd fdset entry, Daniel P . Berrangé, 2020/09/02
- [PATCH v5 2/8] util: split off a helper for dealing with O_CLOEXEC flag, Daniel P . Berrangé, 2020/09/02
- [PATCH v5 3/8] util: rename qemu_open() to qemu_open_old(), Daniel P . Berrangé, 2020/09/02
- [PATCH v5 4/8] util: refactor qemu_open_old to split off variadic args handling, Daniel P . Berrangé, 2020/09/02
- [PATCH v5 5/8] util: add Error object for qemu_open_internal error reporting,
Daniel P . Berrangé <=
- [PATCH v5 6/8] util: introduce qemu_open and qemu_create with error reporting, Daniel P . Berrangé, 2020/09/02
- [PATCH v5 7/8] util: give a specific error message when O_DIRECT doesn't work, Daniel P . Berrangé, 2020/09/02
- [PATCH v5 8/8] block/file: switch to use qemu_open/qemu_create for improved errors, Daniel P . Berrangé, 2020/09/02