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block/io_uring: improve error message when init fails 

The man page for io_uring_queue_init states:

> io_uring_queue_init(3) returns 0 on success and -errno on failure.

and the man page for io_uring_setup (which is one of the functions
where the return value of io_uring_queue_init() can come from) states:

> On error, a negative error code is returned. The caller should not
> rely on errno variable.

Tested using 'sysctl kernel.io_uring_disabled=2'. Output before this
change:

> failed to init linux io_uring ring

Output after this change:

> failed to init linux io_uring ring: Operation not permitted

Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20240123135044.204985-1-f.ebner@proxmox.com>
master
Fiona Ebner 2024-01-23 14:50:44 +01:00 committed by Stefan Hajnoczi
parent 11be70677c
commit 75e79f5a08
1 changed files with 1 additions and 1 deletions
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2
block/io_uring.c
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@ -432,7 +432,7 @@ LuringState *luring_init(Error **errp)
rc = io_uring_queue_init(MAX_ENTRIES, ring, 0);
if (rc < 0) {
error_setg_errno(errp, errno, "failed to init linux io_uring ring");
error_setg_errno(errp, -rc, "failed to init linux io_uring ring");
g_free(s);
return NULL;
}