diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/rdma/ib_verbs.h | 46 | ||||
| -rw-r--r-- | include/rdma/uverbs_types.h | 11 |
2 files changed, 49 insertions, 8 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 8e726fff30fe..e1130c6c1377 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -1476,7 +1476,10 @@ struct ib_fmr_attr { struct ib_umem; enum rdma_remove_reason { - /* Userspace requested uobject deletion. Call could fail */ + /* + * Userspace requested uobject deletion or initial try + * to remove uobject via cleanup. Call could fail + */ RDMA_REMOVE_DESTROY, /* Context deletion. This call should delete the actual object itself */ RDMA_REMOVE_CLOSE, @@ -1503,6 +1506,7 @@ struct ib_ucontext { /* protects cleanup process from other actions */ struct rw_semaphore cleanup_rwsem; enum rdma_remove_reason cleanup_reason; + bool cleanup_retryable; struct pid *tgid; #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING @@ -2685,6 +2689,46 @@ static inline bool ib_is_udata_cleared(struct ib_udata *udata, } /** + * ib_is_destroy_retryable - Check whether the uobject destruction + * is retryable. + * @ret: The initial destruction return code + * @why: remove reason + * @uobj: The uobject that is destroyed + * + * This function is a helper function that IB layer and low-level drivers + * can use to consider whether the destruction of the given uobject is + * retry-able. + * It checks the original return code, if it wasn't success the destruction + * is retryable according to the ucontext state (i.e. cleanup_retryable) and + * the remove reason. (i.e. why). + * Must be called with the object locked for destroy. + */ +static inline bool ib_is_destroy_retryable(int ret, enum rdma_remove_reason why, + struct ib_uobject *uobj) +{ + return ret && (why == RDMA_REMOVE_DESTROY || + uobj->context->cleanup_retryable); +} + +/** + * ib_destroy_usecnt - Called during destruction to check the usecnt + * @usecnt: The usecnt atomic + * @why: remove reason + * @uobj: The uobject that is destroyed + * + * Non-zero usecnts will block destruction unless destruction was triggered by + * a ucontext cleanup. + */ +static inline int ib_destroy_usecnt(atomic_t *usecnt, + enum rdma_remove_reason why, + struct ib_uobject *uobj) +{ + if (atomic_read(usecnt) && ib_is_destroy_retryable(-EBUSY, why, uobj)) + return -EBUSY; + return 0; +} + +/** * ib_modify_qp_is_ok - Check that the supplied attribute mask * contains all required attributes and no attributes not allowed for * the given QP state transition. diff --git a/include/rdma/uverbs_types.h b/include/rdma/uverbs_types.h index cc04ec65588d..175495d1b0b8 100644 --- a/include/rdma/uverbs_types.h +++ b/include/rdma/uverbs_types.h @@ -93,7 +93,6 @@ struct uverbs_obj_type_class { struct uverbs_obj_type { const struct uverbs_obj_type_class * const type_class; size_t obj_size; - unsigned int destroy_order; }; /* @@ -152,10 +151,9 @@ extern const struct uverbs_obj_type_class uverbs_fd_class; #define UVERBS_BUILD_BUG_ON(cond) (sizeof(char[1 - 2 * !!(cond)]) - \ sizeof(char)) -#define UVERBS_TYPE_ALLOC_FD(_order, _obj_size, _context_closed, _fops, _name, _flags)\ +#define UVERBS_TYPE_ALLOC_FD(_obj_size, _context_closed, _fops, _name, _flags)\ ((&((const struct uverbs_obj_fd_type) \ {.type = { \ - .destroy_order = _order, \ .type_class = &uverbs_fd_class, \ .obj_size = (_obj_size) + \ UVERBS_BUILD_BUG_ON((_obj_size) < sizeof(struct ib_uobject_file)), \ @@ -164,18 +162,17 @@ extern const struct uverbs_obj_type_class uverbs_fd_class; .fops = _fops, \ .name = _name, \ .flags = _flags}))->type) -#define UVERBS_TYPE_ALLOC_IDR_SZ(_size, _order, _destroy_object) \ +#define UVERBS_TYPE_ALLOC_IDR_SZ(_size, _destroy_object) \ ((&((const struct uverbs_obj_idr_type) \ {.type = { \ - .destroy_order = _order, \ .type_class = &uverbs_idr_class, \ .obj_size = (_size) + \ UVERBS_BUILD_BUG_ON((_size) < \ sizeof(struct ib_uobject)) \ }, \ .destroy_object = _destroy_object,}))->type) -#define UVERBS_TYPE_ALLOC_IDR(_order, _destroy_object) \ - UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uobject), _order, \ +#define UVERBS_TYPE_ALLOC_IDR(_destroy_object) \ + UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uobject), \ _destroy_object) #endif |