diff options
| -rw-r--r-- | include/linux/liveupdate.h | 5 | ||||
| -rw-r--r-- | kernel/liveupdate/luo_file.c | 9 |
2 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/liveupdate.h b/include/linux/liveupdate.h index 122ad8f16ff9..a7f6ee5b6771 100644 --- a/include/linux/liveupdate.h +++ b/include/linux/liveupdate.h @@ -27,6 +27,10 @@ struct file; * this to the file being operated on. * @serialized_data: The opaque u64 handle, preserve/prepare/freeze may update * this field. + * @private_data: Private data for the file used to hold runtime state that + * is not preserved. Set by the handler's .preserve() + * callback, and must be freed in the handler's + * .unpreserve() callback. * * This structure bundles all parameters for the file operation callbacks. * The 'data' and 'file' fields are used for both input and output. @@ -36,6 +40,7 @@ struct liveupdate_file_op_args { bool retrieved; struct file *file; u64 serialized_data; + void *private_data; }; /** diff --git a/kernel/liveupdate/luo_file.c b/kernel/liveupdate/luo_file.c index e9727cb1275a..ddff87917b21 100644 --- a/kernel/liveupdate/luo_file.c +++ b/kernel/liveupdate/luo_file.c @@ -129,6 +129,10 @@ static LIST_HEAD(luo_file_handler_list); * This handle is passed back to the handler's .freeze(), * .retrieve(), and .finish() callbacks, allowing it to track * and update its serialized state across phases. + * @private_data: Pointer to the private data for the file used to hold runtime + * state that is not preserved. Set by the handler's .preserve() + * callback, and must be freed in the handler's .unpreserve() + * callback. * @retrieved: A flag indicating whether a user/kernel in the new kernel has * successfully called retrieve() on this file. This prevents * multiple retrieval attempts. @@ -155,6 +159,7 @@ struct luo_file { struct liveupdate_file_handler *fh; struct file *file; u64 serialized_data; + void *private_data; bool retrieved; struct mutex mutex; struct list_head list; @@ -298,6 +303,7 @@ int luo_preserve_file(struct luo_file_set *file_set, u64 token, int fd) goto err_kfree; luo_file->serialized_data = args.serialized_data; + luo_file->private_data = args.private_data; list_add_tail(&luo_file->list, &file_set->files_list); file_set->count++; @@ -344,6 +350,7 @@ void luo_file_unpreserve_files(struct luo_file_set *file_set) args.handler = luo_file->fh; args.file = luo_file->file; args.serialized_data = luo_file->serialized_data; + args.private_data = luo_file->private_data; luo_file->fh->ops->unpreserve(&args); list_del(&luo_file->list); @@ -370,6 +377,7 @@ static int luo_file_freeze_one(struct luo_file_set *file_set, args.handler = luo_file->fh; args.file = luo_file->file; args.serialized_data = luo_file->serialized_data; + args.private_data = luo_file->private_data; err = luo_file->fh->ops->freeze(&args); if (!err) @@ -390,6 +398,7 @@ static void luo_file_unfreeze_one(struct luo_file_set *file_set, args.handler = luo_file->fh; args.file = luo_file->file; args.serialized_data = luo_file->serialized_data; + args.private_data = luo_file->private_data; luo_file->fh->ops->unfreeze(&args); } |