On 04/13/2016 10:25 PM, Lee Duncan wrote:
> This commit adds the read-write attribute "dbroot",
> in the top-level CONFIGFS (core) target directory,
> normally /sys/kernel/config/target. This attribute
> defaults to "/var/target" but can be changed by
> writing a new pathname string to it. Changing this
> attribute is only allowed when no fabric drivers
> are loaded and the supplied value specifies an
> existing directory.
>
> Target modules that care about the target database
> root directory will be modified to use this
> attribute in a future commit.
>
> Signed-off-by: Lee Duncan <lduncan@xxxxxxxx>
> ---
> drivers/target/target_core_configfs.c | 51 +++++++++++++++++++++++++++++++++++
> drivers/target/target_core_internal.h | 6 +++++
> 2 files changed, 57 insertions(+)
>
> diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
> index 713c63d9681b..bfedbd92b77f 100644
> --- a/drivers/target/target_core_configfs.c
> +++ b/drivers/target/target_core_configfs.c
> @@ -99,6 +99,56 @@ static ssize_t target_core_item_version_show(struct config_item *item,
>
> CONFIGFS_ATTR_RO(target_core_item_, version);
>
> +char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT;
> +static char db_root_stage[DB_ROOT_LEN];
> +
> +static ssize_t target_core_item_dbroot_show(struct config_item *item,
> + char *page)
> +{
> + return sprintf(page, "%s\n", db_root);
> +}
> +
> +static ssize_t target_core_item_dbroot_store(struct config_item *item,
> + const char *page, size_t count)
> +{
> + ssize_t read_bytes;
> + struct file *fp;
> +
> + if (!list_empty(&g_tf_list)) {
> + pr_err("db_root: cannot be changed: target drivers registered");
> + return -EINVAL;
> + }
Locking?
Cheers,
Hannes
--
Dr. Hannes Reinecke Teamlead Storage & Networking
hare@xxxxxxx +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG Nürnberg)
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