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authorJacob Keller <jacob.e.keller@intel.com>2020-03-26 21:37:16 +0300
committerDavid S. Miller <davem@davemloft.net>2020-03-27 05:39:26 +0300
commitb9a17abfde842bb09f894ba96a5cd9f5944f6bfa (patch)
treed0e2662afc353a3ab1322caf5bd03aa9e234f15e /include/net/devlink.h
parent12102436acf949b5e6eb087846b47488db2aa440 (diff)
downloadlinux-b9a17abfde842bb09f894ba96a5cd9f5944f6bfa.tar.xz
devlink: implement DEVLINK_CMD_REGION_NEW
Implement support for the DEVLINK_CMD_REGION_NEW command for creating snapshots. This new command parallels the existing DEVLINK_CMD_REGION_DEL. In order for DEVLINK_CMD_REGION_NEW to work for a region, the new ".snapshot" operation must be implemented in the region's ops structure. The desired snapshot id must be provided. This helps avoid confusion on the purpose of DEVLINK_CMD_REGION_NEW, and keeps the API simpler. The requested id will be inserted into the xarray tracking the number of snapshots using each id. If this id is already used by another snapshot on any region, an error will be returned. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/devlink.h')
-rw-r--r--include/net/devlink.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/net/devlink.h b/include/net/devlink.h
index fb9154060e6e..a1a02cd5890b 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -501,10 +501,16 @@ struct devlink_info_req;
* struct devlink_region_ops - Region operations
* @name: region name
* @destructor: callback used to free snapshot memory when deleting
+ * @snapshot: callback to request an immediate snapshot. On success,
+ * the data variable must be updated to point to the snapshot data.
+ * The function will be called while the devlink instance lock is
+ * held.
*/
struct devlink_region_ops {
const char *name;
void (*destructor)(const void *data);
+ int (*snapshot)(struct devlink *devlink, struct netlink_ext_ack *extack,
+ u8 **data);
};
struct devlink_fmsg;