Re: [Qemu-devel] [QEMU] [PATCH v5 3/8] bootdevice: Add interface to gather LCHS

[Max Reitz <mreitz@redhat.com>]

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On 26.06.19 14:39, Sam Eiderman wrote:
> Add an interface to provide direct logical CHS values for boot devices.
> We will use this interface in the next commits.
> 
> Reviewed-by: Karl Heubaum <karl.heubaum@oracle.com>
> Reviewed-by: Arbel Moshe <arbel.moshe@oracle.com>
> Signed-off-by: Sam Eiderman <shmuel.eiderman@oracle.com>
> ---
>  bootdevice.c            | 55 +++++++++++++++++++++++++++++++++++++++++++++++++
>  include/sysemu/sysemu.h |  3 +++
>  2 files changed, 58 insertions(+)

I’ve got a couple of “undelivered mail returned to sender” mails for Sam
recently, but anyway...

> diff --git a/bootdevice.c b/bootdevice.c
> index 1d225202f9..bc5e1c2de4 100644
> --- a/bootdevice.c
> +++ b/bootdevice.c
> @@ -343,3 +343,58 @@ void device_add_bootindex_property(Object *obj, int32_t *bootindex,
>      /* initialize devices' bootindex property to -1 */
>      object_property_set_int(obj, -1, name, NULL);
>  }
> +
> +typedef struct FWLCHSEntry FWLCHSEntry;
> +
> +struct FWLCHSEntry {
> +    QTAILQ_ENTRY(FWLCHSEntry) link;
> +    DeviceState *dev;
> +    char *suffix;
> +    uint32_t lcyls;
> +    uint32_t lheads;
> +    uint32_t lsecs;
> +};
> +
> +static QTAILQ_HEAD(, FWLCHSEntry) fw_lchs =
> +    QTAILQ_HEAD_INITIALIZER(fw_lchs);
> +
> +void add_boot_device_lchs(DeviceState *dev, const char *suffix,
> +                          uint32_t lcyls, uint32_t lheads, uint32_t lsecs)
> +{
> +    FWLCHSEntry *node;
> +
> +    if (!lcyls && !lheads && !lsecs) {
> +        return;
> +    }
> +
> +    assert(dev != NULL || suffix != NULL);

It doesn’t look like any caller actually passes a NULL @dev, so why not
drop the @suffix part?

> +    node = g_malloc0(sizeof(FWLCHSEntry));
> +    node->suffix = g_strdup(suffix);
> +    node->dev = dev;
> +    node->lcyls = lcyls;
> +    node->lheads = lheads;
> +    node->lsecs = lsecs;
> +
> +    QTAILQ_INSERT_TAIL(&fw_lchs, node, link);
> +}
> +
> +void del_boot_device_lchs(DeviceState *dev, const char *suffix)
> +{
> +    FWLCHSEntry *i;
> +
> +    if (dev == NULL) {
> +        return;
> +    }
> +
> +    QTAILQ_FOREACH(i, &fw_lchs, link) {
> +        if ((!suffix || !g_strcmp0(i->suffix, suffix)) &&
> +             i->dev == dev) {

(Furthermore, it’d be impossible to remove an FWLCHSEntry with .dev ==
NULL.)

Max

> +            QTAILQ_REMOVE(&fw_lchs, i, link);
> +            g_free(i->suffix);
> +            g_free(i);
> +
> +            break;
> +        }
> +    }
> +}


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