[V3,for-next,4/7] IB/core: Change idr objects to use the new schema

Message ID	1491301907-32290-5-git-send-email-matanb@mellanox.com (mailing list archive)
State	Accepted
Headers	show Return-Path: <linux-rdma-owner@kernel.org> From: Matan Barak <matanb@mellanox.com> To: Doug Ledford <dledford@redhat.com> Cc: linux-rdma@vger.kernel.org, Liran Liss <liranl@mellanox.com>, Jason Gunthorpe <jgunthorpe@obsidianresearch.com>, Sean Hefty <sean.hefty@intel.com>, Leon Romanovsky <leonro@mellanox.com>, Majd Dibbiny <majd@mellanox.com>, Tal Alon <talal@mellanox.com>, Yishai Hadas <yishaih@mellanox.com>, Ira Weiny <ira.weiny@intel.com>, Haggai Eran <haggaie@mellanox.com>, Christoph Lameter <cl@linux.com>, Matan Barak <matanb@mellanox.com> Subject: [PATCH V3 for-next 4/7] IB/core: Change idr objects to use the new schema Date: Tue, 4 Apr 2017 13:31:44 +0300 Message-Id: <1491301907-32290-5-git-send-email-matanb@mellanox.com> In-Reply-To: <1491301907-32290-1-git-send-email-matanb@mellanox.com> References: <1491301907-32290-1-git-send-email-matanb@mellanox.com> Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk

diff --git a/drivers/infiniband/core/rdma_core.h b/drivers/infiniband/core/rdma_core.h index ab665a6..0247bb5 100644 --- a/drivers/infiniband/core/rdma_core.h +++ b/drivers/infiniband/core/rdma_core.h @@ -52,4 +52,19 @@ void uverbs_cleanup_ucontext(struct ib_ucontext *ucontext, bool device_removed); void uverbs_initialize_ucontext(struct ib_ucontext *ucontext); +/* + * uverbs_uobject_get is called in order to increase the reference count on + * an uobject. This is useful when a handler wants to keep the uobject's memory + * alive, regardless if this uobject is still alive in the context's objects + * repository. Objects are put via uverbs_uobject_put. + */ +void uverbs_uobject_get(struct ib_uobject *uobject); + +/* + * In order to indicate we no longer needs this uobject, uverbs_uobject_put + * is called. When the reference count is decreased, the uobject is freed. + * For example, this is used when attaching a completion channel to a CQ. + */ +void uverbs_uobject_put(struct ib_uobject *uobject); + #endif /* RDMA_CORE_H */ diff --git a/drivers/infiniband/core/uverbs.h b/drivers/infiniband/core/uverbs.h index cf0519d..3660278 100644 --- a/drivers/infiniband/core/uverbs.h +++ b/drivers/infiniband/core/uverbs.h @@ -180,8 +180,6 @@ struct ib_ucq_object { u32 async_events_reported; }; -void idr_remove_uobj(struct ib_uobject *uobj); - struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file, struct ib_device *ib_dev, int is_async); diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index 79de69d..2f258aa 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -40,269 +40,13 @@ #include <linux/uaccess.h> +#include <rdma/uverbs_types.h> +#include <rdma/uverbs_std_types.h> +#include "rdma_core.h" + #include "uverbs.h" #include "core_priv.h" -struct uverbs_lock_class { - struct lock_class_key key; - char name[16]; -}; - -static struct uverbs_lock_class pd_lock_class = { .name = "PD-uobj" }; -static struct uverbs_lock_class mr_lock_class = { .name = "MR-uobj" }; -static struct uverbs_lock_class mw_lock_class = { .name = "MW-uobj" }; -static struct uverbs_lock_class cq_lock_class = { .name = "CQ-uobj" }; -static struct uverbs_lock_class qp_lock_class = { .name = "QP-uobj" }; -static struct uverbs_lock_class ah_lock_class = { .name = "AH-uobj" }; -static struct uverbs_lock_class srq_lock_class = { .name = "SRQ-uobj" }; -static struct uverbs_lock_class xrcd_lock_class = { .name = "XRCD-uobj" }; -static struct uverbs_lock_class rule_lock_class = { .name = "RULE-uobj" }; -static struct uverbs_lock_class wq_lock_class = { .name = "WQ-uobj" }; -static struct uverbs_lock_class rwq_ind_table_lock_class = { .name = "IND_TBL-uobj" }; - -/* - * The ib_uobject locking scheme is as follows: - * - * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it - * needs to be held during all idr write operations. When an object is - * looked up, a reference must be taken on the object's kref before - * dropping this lock. For read operations, the rcu_read_lock() - * and rcu_write_lock() but similarly the kref reference is grabbed - * before the rcu_read_unlock(). - * - * - Each object also has an rwsem. This rwsem must be held for - * reading while an operation that uses the object is performed. - * For example, while registering an MR, the associated PD's - * uobject.mutex must be held for reading. The rwsem must be held - * for writing while initializing or destroying an object. - * - * - In addition, each object has a "live" flag. If this flag is not - * set, then lookups of the object will fail even if it is found in - * the idr. This handles a reader that blocks and does not acquire - * the rwsem until after the object is destroyed. The destroy - * operation will set the live flag to 0 and then drop the rwsem; - * this will allow the reader to acquire the rwsem, see that the - * live flag is 0, and then drop the rwsem and its reference to - * object. The underlying storage will not be freed until the last - * reference to the object is dropped. - */ - -static void init_uobj(struct ib_uobject *uobj, u64 user_handle, - struct ib_ucontext *context, struct uverbs_lock_class *c) -{ - uobj->user_handle = user_handle; - uobj->context = context; - kref_init(&uobj->ref); - init_rwsem(&uobj->mutex); - lockdep_set_class_and_name(&uobj->mutex, &c->key, c->name); - uobj->live = 0; -} - -static void release_uobj(struct kref *kref) -{ - kfree_rcu(container_of(kref, struct ib_uobject, ref), rcu); -} - -static void put_uobj(struct ib_uobject *uobj) -{ - kref_put(&uobj->ref, release_uobj); -} - -static void put_uobj_read(struct ib_uobject *uobj) -{ - up_read(&uobj->mutex); - put_uobj(uobj); -} - -static void put_uobj_write(struct ib_uobject *uobj) -{ - up_write(&uobj->mutex); - put_uobj(uobj); -} - -static int idr_add_uobj(struct ib_uobject *uobj) -{ - int ret; - - idr_preload(GFP_KERNEL); - spin_lock(&uobj->context->ufile->idr_lock); - - ret = idr_alloc(&uobj->context->ufile->idr, uobj, 0, 0, GFP_NOWAIT); - if (ret >= 0) - uobj->id = ret; - - spin_unlock(&uobj->context->ufile->idr_lock); - idr_preload_end(); - - return ret < 0 ? ret : 0; -} - -void idr_remove_uobj(struct ib_uobject *uobj) -{ - spin_lock(&uobj->context->ufile->idr_lock); - idr_remove(&uobj->context->ufile->idr, uobj->id); - spin_unlock(&uobj->context->ufile->idr_lock); -} - -static struct ib_uobject *__idr_get_uobj(int id, struct ib_ucontext *context) -{ - struct ib_uobject *uobj; - - rcu_read_lock(); - uobj = idr_find(&context->ufile->idr, id); - if (uobj) { - if (uobj->context == context) - kref_get(&uobj->ref); - else - uobj = NULL; - } - rcu_read_unlock(); - - return uobj; -} - -static struct ib_uobject *idr_read_uobj(int id, struct ib_ucontext *context, - int nested) -{ - struct ib_uobject *uobj; - - uobj = __idr_get_uobj(id, context); - if (!uobj) - return NULL; - - if (nested) - down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING); - else - down_read(&uobj->mutex); - if (!uobj->live) { - put_uobj_read(uobj); - return NULL; - } - - return uobj; -} - -static struct ib_uobject *idr_write_uobj(int id, struct ib_ucontext *context) -{ - struct ib_uobject *uobj; - - uobj = __idr_get_uobj(id, context); - if (!uobj) - return NULL; - - down_write(&uobj->mutex); - if (!uobj->live) { - put_uobj_write(uobj); - return NULL; - } - - return uobj; -} - -static void *idr_read_obj(int id, struct ib_ucontext *context, - int nested) -{ - struct ib_uobject *uobj; - - uobj = idr_read_uobj(id, context, nested); - return uobj ? uobj->object : NULL; -} - -static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context) -{ - return idr_read_obj(pd_handle, context, 0); -} - -static void put_pd_read(struct ib_pd *pd) -{ - put_uobj_read(pd->uobject); -} - -static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested) -{ - return idr_read_obj(cq_handle, context, nested); -} - -static void put_cq_read(struct ib_cq *cq) -{ - put_uobj_read(cq->uobject); -} - -static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context) -{ - return idr_read_obj(ah_handle, context, 0); -} - -static void put_ah_read(struct ib_ah *ah) -{ - put_uobj_read(ah->uobject); -} - -static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context) -{ - return idr_read_obj(qp_handle, context, 0); -} - -static struct ib_wq *idr_read_wq(int wq_handle, struct ib_ucontext *context) -{ - return idr_read_obj(wq_handle, context, 0); -} - -static void put_wq_read(struct ib_wq *wq) -{ - put_uobj_read(wq->uobject); -} - -static struct ib_rwq_ind_table *idr_read_rwq_indirection_table(int ind_table_handle, - struct ib_ucontext *context) -{ - return idr_read_obj(ind_table_handle, context, 0); -} - -static void put_rwq_indirection_table_read(struct ib_rwq_ind_table *ind_table) -{ - put_uobj_read(ind_table->uobject); -} - -static struct ib_qp *idr_write_qp(int qp_handle, struct ib_ucontext *context) -{ - struct ib_uobject *uobj; - - uobj = idr_write_uobj(qp_handle, context); - return uobj ? uobj->object : NULL; -} - -static void put_qp_read(struct ib_qp *qp) -{ - put_uobj_read(qp->uobject); -} - -static void put_qp_write(struct ib_qp *qp) -{ - put_uobj_write(qp->uobject); -} - -static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context) -{ - return idr_read_obj(srq_handle, context, 0); -} - -static void put_srq_read(struct ib_srq *srq) -{ - put_uobj_read(srq->uobject); -} - -static struct ib_xrcd *idr_read_xrcd(int xrcd_handle, struct ib_ucontext *context, - struct ib_uobject **uobj) -{ - *uobj = idr_read_uobj(xrcd_handle, context, 0); - return *uobj ? (*uobj)->object : NULL; -} - -static void put_xrcd_read(struct ib_uobject *uobj) -{ - put_uobj_read(uobj); -} ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file, struct ib_device *ib_dev, const char __user *buf, @@ -347,17 +91,8 @@ ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file, ucontext->cg_obj = cg_obj; /* ufile is required when some objects are released */ ucontext->ufile = file; - INIT_LIST_HEAD(&ucontext->pd_list); - INIT_LIST_HEAD(&ucontext->mr_list); - INIT_LIST_HEAD(&ucontext->mw_list); - INIT_LIST_HEAD(&ucontext->cq_list); - INIT_LIST_HEAD(&ucontext->qp_list); - INIT_LIST_HEAD(&ucontext->srq_list); - INIT_LIST_HEAD(&ucontext->ah_list); - INIT_LIST_HEAD(&ucontext->wq_list); - INIT_LIST_HEAD(&ucontext->rwq_ind_tbl_list); - INIT_LIST_HEAD(&ucontext->xrcd_list); - INIT_LIST_HEAD(&ucontext->rule_list); + uverbs_initialize_ucontext(ucontext); + rcu_read_lock(); ucontext->tgid = get_task_pid(current->group_leader, PIDTYPE_PID); rcu_read_unlock(); @@ -564,19 +299,9 @@ ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file, (unsigned long) cmd.response + sizeof resp, in_len - sizeof cmd, out_len - sizeof resp); - uobj = kmalloc(sizeof *uobj, GFP_KERNEL); - if (!uobj) - return -ENOMEM; - - init_uobj(uobj, 0, file->ucontext, &pd_lock_class); - ret = ib_rdmacg_try_charge(&uobj->cg_obj, ib_dev, - RDMACG_RESOURCE_HCA_OBJECT); - if (ret) { - kfree(uobj); - return ret; - } - - down_write(&uobj->mutex); + uobj = uobj_alloc(uobj_get_type(pd), file->ucontext); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); pd = ib_dev->alloc_pd(ib_dev, file->ucontext, &udata); if (IS_ERR(pd)) { @@ -590,10 +315,6 @@ ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file, atomic_set(&pd->usecnt, 0); uobj->object = pd; - ret = idr_add_uobj(uobj); - if (ret) - goto err_idr; - memset(&resp, 0, sizeof resp); resp.pd_handle = uobj->id; @@ -603,25 +324,15 @@ ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file, goto err_copy; } - mutex_lock(&file->mutex); - list_add_tail(&uobj->list, &file->ucontext->pd_list); - mutex_unlock(&file->mutex); - - uobj->live = 1; - - up_write(&uobj->mutex); + uobj_alloc_commit(uobj); return in_len; err_copy: - idr_remove_uobj(uobj); - -err_idr: ib_dealloc_pd(pd); err: - ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMACG_RESOURCE_HCA_OBJECT); - put_uobj_write(uobj); + uobj_alloc_abort(uobj); return ret; } @@ -632,45 +343,19 @@ ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file, { struct ib_uverbs_dealloc_pd cmd; struct ib_uobject *uobj; - struct ib_pd *pd; int ret; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; - uobj = idr_write_uobj(cmd.pd_handle, file->ucontext); - if (!uobj) - return -EINVAL; - pd = uobj->object; + uobj = uobj_get_write(uobj_get_type(pd), cmd.pd_handle, + file->ucontext); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); - if (atomic_read(&pd->usecnt)) { - ret = -EBUSY; - goto err_put; - } + ret = uobj_remove_commit(uobj); - ret = pd->device->dealloc_pd(uobj->object); - WARN_ONCE(ret, "Infiniband HW driver failed dealloc_pd"); - if (ret) - goto err_put; - - ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMACG_RESOURCE_HCA_OBJECT); - - uobj->live = 0; - put_uobj_write(uobj); - - idr_remove_uobj(uobj); - - mutex_lock(&file->mutex); - list_del(&uobj->list); - mutex_unlock(&file->mutex); - - put_uobj(uobj); - - return in_len; - -err_put: - put_uobj_write(uobj); - return ret; + return ret ?: in_len; } struct xrcd_table_entry { @@ -807,16 +492,13 @@ ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file, } } - obj = kmalloc(sizeof *obj, GFP_KERNEL); - if (!obj) { - ret = -ENOMEM; + obj = (struct ib_uxrcd_object *)uobj_alloc(uobj_get_type(xrcd), + file->ucontext); + if (IS_ERR(obj)) { + ret = PTR_ERR(obj); goto err_tree_mutex_unlock; } - init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_class); - - down_write(&obj->uobject.mutex); - if (!xrcd) { xrcd = ib_dev->alloc_xrcd(ib_dev, file->ucontext, &udata); if (IS_ERR(xrcd)) { @@ -834,10 +516,6 @@ ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file, atomic_set(&obj->refcnt, 0); obj->uobject.object = xrcd; - ret = idr_add_uobj(&obj->uobject); - if (ret) - goto err_idr; - memset(&resp, 0, sizeof resp); resp.xrcd_handle = obj->uobject.id; @@ -846,7 +524,7 @@ ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file, /* create new inode/xrcd table entry */ ret = xrcd_table_insert(file->device, inode, xrcd); if (ret) - goto err_insert_xrcd; + goto err_dealloc_xrcd; } atomic_inc(&xrcd->usecnt); } @@ -860,12 +538,7 @@ ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file, if (f.file) fdput(f); - mutex_lock(&file->mutex); - list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list); - mutex_unlock(&file->mutex); - - obj->uobject.live = 1; - up_write(&obj->uobject.mutex); + uobj_alloc_commit(&obj->uobject); mutex_unlock(&file->device->xrcd_tree_mutex); return in_len; @@ -877,14 +550,11 @@ ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file, atomic_dec(&xrcd->usecnt); } -err_insert_xrcd: - idr_remove_uobj(&obj->uobject); - -err_idr: +err_dealloc_xrcd: ib_dealloc_xrcd(xrcd); err: - put_uobj_write(&obj->uobject); + uobj_alloc_abort(&obj->uobject); err_tree_mutex_unlock: if (f.file) @@ -902,60 +572,20 @@ ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file, { struct ib_uverbs_close_xrcd cmd; struct ib_uobject *uobj; - struct ib_xrcd *xrcd = NULL; - struct inode *inode = NULL; - struct ib_uxrcd_object *obj; - int live; int ret = 0; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; - mutex_lock(&file->device->xrcd_tree_mutex); - uobj = idr_write_uobj(cmd.xrcd_handle, file->ucontext); - if (!uobj) { - ret = -EINVAL; - goto out; - } - - xrcd = uobj->object; - inode = xrcd->inode; - obj = container_of(uobj, struct ib_uxrcd_object, uobject); - if (atomic_read(&obj->refcnt)) { - put_uobj_write(uobj); - ret = -EBUSY; - goto out; - } - - if (!inode || atomic_dec_and_test(&xrcd->usecnt)) { - ret = ib_dealloc_xrcd(uobj->object); - if (!ret) - uobj->live = 0; + uobj = uobj_get_write(uobj_get_type(xrcd), cmd.xrcd_handle, + file->ucontext); + if (IS_ERR(uobj)) { + mutex_unlock(&file->device->xrcd_tree_mutex); + return PTR_ERR(uobj); } - live = uobj->live; - if (inode && ret) - atomic_inc(&xrcd->usecnt); - - put_uobj_write(uobj); - - if (ret) - goto out; - - if (inode && !live) - xrcd_table_delete(file->device, inode); - - idr_remove_uobj(uobj); - mutex_lock(&file->mutex); - list_del(&uobj->list); - mutex_unlock(&file->mutex); - - put_uobj(uobj); - ret = in_len; - -out: - mutex_unlock(&file->device->xrcd_tree_mutex); - return ret; + ret = uobj_remove_commit(uobj); + return ret ?: in_len; } int ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev, @@ -1009,14 +639,11 @@ ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file, if (ret) return ret; - uobj = kmalloc(sizeof *uobj, GFP_KERNEL); - if (!uobj) - return -ENOMEM; - - init_uobj(uobj, 0, file->ucontext, &mr_lock_class); - down_write(&uobj->mutex); + uobj = uobj_alloc(uobj_get_type(mr), file->ucontext); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); - pd = idr_read_pd(cmd.pd_handle, file->ucontext); + pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext); if (!pd) { ret = -EINVAL; goto err_free; @@ -1030,10 +657,6 @@ ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file, goto err_put; } } - ret = ib_rdmacg_try_charge(&uobj->cg_obj, ib_dev, - RDMACG_RESOURCE_HCA_OBJECT); - if (ret) - goto err_charge; mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va, cmd.access_flags, &udata); @@ -1048,9 +671,6 @@ ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file, atomic_inc(&pd->usecnt); uobj->object = mr; - ret = idr_add_uobj(uobj); - if (ret) - goto err_unreg; memset(&resp, 0, sizeof resp); resp.lkey = mr->lkey; @@ -1063,32 +683,20 @@ ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file, goto err_copy; } - put_pd_read(pd); - - mutex_lock(&file->mutex); - list_add_tail(&uobj->list, &file->ucontext->mr_list); - mutex_unlock(&file->mutex); + uobj_put_obj_read(pd); - uobj->live = 1; - - up_write(&uobj->mutex); + uobj_alloc_commit(uobj); return in_len; err_copy: - idr_remove_uobj(uobj); - -err_unreg: ib_dereg_mr(mr); err_put: - ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMACG_RESOURCE_HCA_OBJECT); - -err_charge: - put_pd_read(pd); + uobj_put_obj_read(pd); err_free: - put_uobj_write(uobj); + uobj_alloc_abort(uobj); return ret; } @@ -1124,10 +732,10 @@ ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file, (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))) return -EINVAL; - uobj = idr_write_uobj(cmd.mr_handle, file->ucontext); - - if (!uobj) - return -EINVAL; + uobj = uobj_get_write(uobj_get_type(mr), cmd.mr_handle, + file->ucontext); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); mr = uobj->object; @@ -1138,7 +746,7 @@ ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file, } if (cmd.flags & IB_MR_REREG_PD) { - pd = idr_read_pd(cmd.pd_handle, file->ucontext); + pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext); if (!pd) { ret = -EINVAL; goto put_uobjs; @@ -1171,11 +779,10 @@ ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file, put_uobj_pd: if (cmd.flags & IB_MR_REREG_PD) - put_pd_read(pd); + uobj_put_obj_read(pd); put_uobjs: - - put_uobj_write(mr->uobject); + uobj_put_write(uobj); return ret; } @@ -1186,38 +793,20 @@ ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file, int out_len) { struct ib_uverbs_dereg_mr cmd; - struct ib_mr *mr; struct ib_uobject *uobj; int ret = -EINVAL; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; - uobj = idr_write_uobj(cmd.mr_handle, file->ucontext); - if (!uobj) - return -EINVAL; - - mr = uobj->object; - - ret = ib_dereg_mr(mr); - if (!ret) - uobj->live = 0; - - put_uobj_write(uobj); + uobj = uobj_get_write(uobj_get_type(mr), cmd.mr_handle, + file->ucontext); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); - if (ret) - return ret; + ret = uobj_remove_commit(uobj); - ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMACG_RESOURCE_HCA_OBJECT); - idr_remove_uobj(uobj); - - mutex_lock(&file->mutex); - list_del(&uobj->list); - mutex_unlock(&file->mutex); - - put_uobj(uobj); - - return in_len; + return ret ?: in_len; } ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file, @@ -1239,14 +828,11 @@ ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file, if (copy_from_user(&cmd, buf, sizeof(cmd))) return -EFAULT; - uobj = kmalloc(sizeof(*uobj), GFP_KERNEL); - if (!uobj) - return -ENOMEM; + uobj = uobj_alloc(uobj_get_type(mw), file->ucontext); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); - init_uobj(uobj, 0, file->ucontext, &mw_lock_class); - down_write(&uobj->mutex); - - pd = idr_read_pd(cmd.pd_handle, file->ucontext); + pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext); if (!pd) { ret = -EINVAL; goto err_free; @@ -1257,11 +843,6 @@ ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file, in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr), out_len - sizeof(resp)); - ret = ib_rdmacg_try_charge(&uobj->cg_obj, ib_dev, - RDMACG_RESOURCE_HCA_OBJECT); - if (ret) - goto err_charge; - mw = pd->device->alloc_mw(pd, cmd.mw_type, &udata); if (IS_ERR(mw)) { ret = PTR_ERR(mw); @@ -1274,9 +855,6 @@ ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file, atomic_inc(&pd->usecnt); uobj->object = mw; - ret = idr_add_uobj(uobj); - if (ret) - goto err_unalloc; memset(&resp, 0, sizeof(resp)); resp.rkey = mw->rkey; @@ -1288,32 +866,17 @@ ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file, goto err_copy; } - put_pd_read(pd); - - mutex_lock(&file->mutex); - list_add_tail(&uobj->list, &file->ucontext->mw_list); - mutex_unlock(&file->mutex); - - uobj->live = 1; - - up_write(&uobj->mutex); + uobj_put_obj_read(pd); + uobj_alloc_commit(uobj); return in_len; err_copy: - idr_remove_uobj(uobj); - -err_unalloc: uverbs_dealloc_mw(mw); - err_put: - ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMACG_RESOURCE_HCA_OBJECT); - -err_charge: - put_pd_read(pd); - + uobj_put_obj_read(pd); err_free: - put_uobj_write(uobj); + uobj_alloc_abort(uobj); return ret; } @@ -1323,38 +886,19 @@ ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file, int out_len) { struct ib_uverbs_dealloc_mw cmd; - struct ib_mw *mw; struct ib_uobject *uobj; int ret = -EINVAL; if (copy_from_user(&cmd, buf, sizeof(cmd))) return -EFAULT; - uobj = idr_write_uobj(cmd.mw_handle, file->ucontext); - if (!uobj) - return -EINVAL; - - mw = uobj->object; + uobj = uobj_get_write(uobj_get_type(mw), cmd.mw_handle, + file->ucontext); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); - ret = uverbs_dealloc_mw(mw); - if (!ret) - uobj->live = 0; - - put_uobj_write(uobj); - - if (ret) - return ret; - - ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMACG_RESOURCE_HCA_OBJECT); - idr_remove_uobj(uobj); - - mutex_lock(&file->mutex); - list_del(&uobj->list); - mutex_unlock(&file->mutex); - - put_uobj(uobj); - - return in_len; + ret = uobj_remove_commit(uobj); + return ret ?: in_len; } ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file, @@ -1418,12 +962,10 @@ static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file, if (cmd->comp_vector >= file->device->num_comp_vectors) return ERR_PTR(-EINVAL); - obj = kmalloc(sizeof *obj, GFP_KERNEL); - if (!obj) - return ERR_PTR(-ENOMEM); - - init_uobj(&obj->uobject, cmd->user_handle, file->ucontext, &cq_lock_class); - down_write(&obj->uobject.mutex); + obj = (struct ib_ucq_object *)uobj_alloc(uobj_get_type(cq), + file->ucontext); + if (IS_ERR(obj)) + return obj; if (cmd->comp_channel >= 0) { ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel); @@ -1433,6 +975,7 @@ static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file, } } + obj->uobject.user_handle = cmd->user_handle; obj->uverbs_file = file; obj->comp_events_reported = 0; obj->async_events_reported = 0; @@ -1445,13 +988,7 @@ static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file, if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags)) attr.flags = cmd->flags; - ret = ib_rdmacg_try_charge(&obj->uobject.cg_obj, ib_dev, - RDMACG_RESOURCE_HCA_OBJECT); - if (ret) - goto err_charge; - - cq = ib_dev->create_cq(ib_dev, &attr, - file->ucontext, uhw); + cq = ib_dev->create_cq(ib_dev, &attr, file->ucontext, uhw); if (IS_ERR(cq)) { ret = PTR_ERR(cq); goto err_file; @@ -1465,10 +1002,6 @@ static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file, atomic_set(&cq->usecnt, 0); obj->uobject.object = cq; - ret = idr_add_uobj(&obj->uobject); - if (ret) - goto err_free; - memset(&resp, 0, sizeof resp); resp.base.cq_handle = obj->uobject.id; resp.base.cqe = cq->cqe; @@ -1480,32 +1013,19 @@ static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file, if (ret) goto err_cb; - mutex_lock(&file->mutex); - list_add_tail(&obj->uobject.list, &file->ucontext->cq_list); - mutex_unlock(&file->mutex); - - obj->uobject.live = 1; - - up_write(&obj->uobject.mutex); + uobj_alloc_commit(&obj->uobject); return obj; err_cb: - idr_remove_uobj(&obj->uobject); - -err_free: ib_destroy_cq(cq); err_file: - ib_rdmacg_uncharge(&obj->uobject.cg_obj, ib_dev, - RDMACG_RESOURCE_HCA_OBJECT); - -err_charge: if (ev_file) ib_uverbs_release_ucq(file, ev_file, obj); err: - put_uobj_write(&obj->uobject); + uobj_alloc_abort(&obj->uobject); return ERR_PTR(ret); } @@ -1628,7 +1148,7 @@ ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file, (unsigned long) cmd.response + sizeof resp, in_len - sizeof cmd, out_len - sizeof resp); - cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); + cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext); if (!cq) return -EINVAL; @@ -1643,7 +1163,7 @@ ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file, ret = -EFAULT; out: - put_cq_read(cq); + uobj_put_obj_read(cq); return ret ? ret : in_len; } @@ -1690,7 +1210,7 @@ ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file, if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; - cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); + cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext); if (!cq) return -EINVAL; @@ -1722,7 +1242,7 @@ ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file, ret = in_len; out_put: - put_cq_read(cq); + uobj_put_obj_read(cq); return ret; } @@ -1737,14 +1257,14 @@ ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file, if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; - cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); + cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext); if (!cq) return -EINVAL; ib_req_notify_cq(cq, cmd.solicited_only ? IB_CQ_SOLICITED : IB_CQ_NEXT_COMP); - put_cq_read(cq); + uobj_put_obj_read(cq); return in_len; } @@ -1765,37 +1285,32 @@ ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file, if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; - uobj = idr_write_uobj(cmd.cq_handle, file->ucontext); - if (!uobj) - return -EINVAL; + uobj = uobj_get_write(uobj_get_type(cq), cmd.cq_handle, + file->ucontext); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); + + /* + * Make sure we don't free the memory in remove_commit as we still + * needs the uobject memory to create the response. + */ + uverbs_uobject_get(uobj); cq = uobj->object; ev_file = cq->cq_context; obj = container_of(cq->uobject, struct ib_ucq_object, uobject); - ret = ib_destroy_cq(cq); - if (!ret) - uobj->live = 0; - - put_uobj_write(uobj); + memset(&resp, 0, sizeof(resp)); - if (ret) + ret = uobj_remove_commit(uobj); + if (ret) { + uverbs_uobject_put(uobj); return ret; + } - ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMACG_RESOURCE_HCA_OBJECT); - idr_remove_uobj(uobj); - - mutex_lock(&file->mutex); - list_del(&uobj->list); - mutex_unlock(&file->mutex); - - ib_uverbs_release_ucq(file, ev_file, obj); - - memset(&resp, 0, sizeof resp); resp.comp_events_reported = obj->comp_events_reported; resp.async_events_reported = obj->async_events_reported; - put_uobj(uobj); - + uverbs_uobject_put(uobj); if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) return -EFAULT; @@ -1817,7 +1332,7 @@ static int create_qp(struct ib_uverbs_file *file, struct ib_device *device; struct ib_pd *pd = NULL; struct ib_xrcd *xrcd = NULL; - struct ib_uobject *uninitialized_var(xrcd_uobj); + struct ib_uobject *xrcd_uobj = ERR_PTR(-ENOENT); struct ib_cq *scq = NULL, *rcq = NULL; struct ib_srq *srq = NULL; struct ib_qp *qp; @@ -1831,18 +1346,19 @@ static int create_qp(struct ib_uverbs_file *file, if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW)) return -EPERM; - obj = kzalloc(sizeof *obj, GFP_KERNEL); - if (!obj) - return -ENOMEM; + obj = (struct ib_uqp_object *)uobj_alloc(uobj_get_type(qp), + file->ucontext); + if (IS_ERR(obj)) + return PTR_ERR(obj); + obj->uxrcd = NULL; + obj->uevent.uobject.user_handle = cmd->user_handle; - init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, - &qp_lock_class); - down_write(&obj->uevent.uobject.mutex); if (cmd_sz >= offsetof(typeof(*cmd), rwq_ind_tbl_handle) + sizeof(cmd->rwq_ind_tbl_handle) && (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE)) { - ind_tbl = idr_read_rwq_indirection_table(cmd->rwq_ind_tbl_handle, - file->ucontext); + ind_tbl = uobj_get_obj_read(rwq_ind_table, + cmd->rwq_ind_tbl_handle, + file->ucontext); if (!ind_tbl) { ret = -EINVAL; goto err_put; @@ -1866,8 +1382,15 @@ static int create_qp(struct ib_uverbs_file *file, has_sq = false; if (cmd->qp_type == IB_QPT_XRC_TGT) { - xrcd = idr_read_xrcd(cmd->pd_handle, file->ucontext, - &xrcd_uobj); + xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd->pd_handle, + file->ucontext); + + if (IS_ERR(xrcd_uobj)) { + ret = -EINVAL; + goto err_put; + } + + xrcd = (struct ib_xrcd *)xrcd_uobj->object; if (!xrcd) { ret = -EINVAL; goto err_put; @@ -1879,8 +1402,8 @@ static int create_qp(struct ib_uverbs_file *file, cmd->max_recv_sge = 0; } else { if (cmd->is_srq) { - srq = idr_read_srq(cmd->srq_handle, - file->ucontext); + srq = uobj_get_obj_read(srq, cmd->srq_handle, + file->ucontext); if (!srq || srq->srq_type != IB_SRQT_BASIC) { ret = -EINVAL; goto err_put; @@ -1889,8 +1412,8 @@ static int create_qp(struct ib_uverbs_file *file, if (!ind_tbl) { if (cmd->recv_cq_handle != cmd->send_cq_handle) { - rcq = idr_read_cq(cmd->recv_cq_handle, - file->ucontext, 0); + rcq = uobj_get_obj_read(cq, cmd->recv_cq_handle, + file->ucontext); if (!rcq) { ret = -EINVAL; goto err_put; @@ -1900,10 +1423,11 @@ static int create_qp(struct ib_uverbs_file *file, } if (has_sq) - scq = idr_read_cq(cmd->send_cq_handle, file->ucontext, !!rcq); + scq = uobj_get_obj_read(cq, cmd->send_cq_handle, + file->ucontext); if (!ind_tbl) rcq = rcq ?: scq; - pd = idr_read_pd(cmd->pd_handle, file->ucontext); + pd = uobj_get_obj_read(pd, cmd->pd_handle, file->ucontext); if (!pd || (!scq && has_sq)) { ret = -EINVAL; goto err_put; @@ -1955,11 +1479,6 @@ static int create_qp(struct ib_uverbs_file *file, goto err_put; } - ret = ib_rdmacg_try_charge(&obj->uevent.uobject.cg_obj, device, - RDMACG_RESOURCE_HCA_OBJECT); - if (ret) - goto err_put; - if (cmd->qp_type == IB_QPT_XRC_TGT) qp = ib_create_qp(pd, &attr); else @@ -1967,7 +1486,7 @@ static int create_qp(struct ib_uverbs_file *file, if (IS_ERR(qp)) { ret = PTR_ERR(qp); - goto err_create; + goto err_put; } if (cmd->qp_type != IB_QPT_XRC_TGT) { @@ -1995,9 +1514,6 @@ static int create_qp(struct ib_uverbs_file *file, qp->uobject = &obj->uevent.uobject; obj->uevent.uobject.object = qp; - ret = idr_add_uobj(&obj->uevent.uobject); - if (ret) - goto err_destroy; memset(&resp, 0, sizeof resp); resp.base.qpn = qp->qp_num; @@ -2019,54 +1535,41 @@ static int create_qp(struct ib_uverbs_file *file, obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); atomic_inc(&obj->uxrcd->refcnt); - put_xrcd_read(xrcd_uobj); + uobj_put_read(xrcd_uobj); } if (pd) - put_pd_read(pd); + uobj_put_obj_read(pd); if (scq) - put_cq_read(scq); + uobj_put_obj_read(scq); if (rcq && rcq != scq) - put_cq_read(rcq); + uobj_put_obj_read(rcq); if (srq) - put_srq_read(srq); + uobj_put_obj_read(srq); if (ind_tbl) - put_rwq_indirection_table_read(ind_tbl); - - mutex_lock(&file->mutex); - list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list); - mutex_unlock(&file->mutex); - - obj->uevent.uobject.live = 1; + uobj_put_obj_read(ind_tbl); - up_write(&obj->uevent.uobject.mutex); + uobj_alloc_commit(&obj->uevent.uobject); return 0; err_cb: - idr_remove_uobj(&obj->uevent.uobject); - -err_destroy: ib_destroy_qp(qp); -err_create: - ib_rdmacg_uncharge(&obj->uevent.uobject.cg_obj, device, - RDMACG_RESOURCE_HCA_OBJECT); - err_put: - if (xrcd) - put_xrcd_read(xrcd_uobj); + if (!IS_ERR(xrcd_uobj)) + uobj_put_read(xrcd_uobj); if (pd) - put_pd_read(pd); + uobj_put_obj_read(pd); if (scq) - put_cq_read(scq); + uobj_put_obj_read(scq); if (rcq && rcq != scq) - put_cq_read(rcq); + uobj_put_obj_read(rcq); if (srq) - put_srq_read(srq); + uobj_put_obj_read(srq); if (ind_tbl) - put_rwq_indirection_table_read(ind_tbl); + uobj_put_obj_read(ind_tbl); - put_uobj_write(&obj->uevent.uobject); + uobj_alloc_abort(&obj->uevent.uobject); return ret; } @@ -2202,17 +1705,22 @@ ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file, (unsigned long) cmd.response + sizeof resp, in_len - sizeof cmd, out_len - sizeof resp); - obj = kmalloc(sizeof *obj, GFP_KERNEL); - if (!obj) - return -ENOMEM; + obj = (struct ib_uqp_object *)uobj_alloc(uobj_get_type(qp), + file->ucontext); + if (IS_ERR(obj)) + return PTR_ERR(obj); - init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class); - down_write(&obj->uevent.uobject.mutex); + xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd.pd_handle, + file->ucontext); + if (IS_ERR(xrcd_uobj)) { + ret = -EINVAL; + goto err_put; + } - xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj); + xrcd = (struct ib_xrcd *)xrcd_uobj->object; if (!xrcd) { ret = -EINVAL; - goto err_put; + goto err_xrcd; } attr.event_handler = ib_uverbs_qp_event_handler; @@ -2227,15 +1735,11 @@ ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file, qp = ib_open_qp(xrcd, &attr); if (IS_ERR(qp)) { ret = PTR_ERR(qp); - goto err_put; + goto err_xrcd; } - qp->uobject = &obj->uevent.uobject; - obj->uevent.uobject.object = qp; - ret = idr_add_uobj(&obj->uevent.uobject); - if (ret) - goto err_destroy; + obj->uevent.uobject.user_handle = cmd.user_handle; memset(&resp, 0, sizeof resp); resp.qpn = qp->qp_num; @@ -2244,32 +1748,25 @@ ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file, if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) { ret = -EFAULT; - goto err_remove; + goto err_destroy; } obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); atomic_inc(&obj->uxrcd->refcnt); - put_xrcd_read(xrcd_uobj); - - mutex_lock(&file->mutex); - list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list); - mutex_unlock(&file->mutex); + qp->uobject = &obj->uevent.uobject; + uobj_put_read(xrcd_uobj); - obj->uevent.uobject.live = 1; - up_write(&obj->uevent.uobject.mutex); + uobj_alloc_commit(&obj->uevent.uobject); return in_len; -err_remove: - idr_remove_uobj(&obj->uevent.uobject); - err_destroy: ib_destroy_qp(qp); - +err_xrcd: + uobj_put_read(xrcd_uobj); err_put: - put_xrcd_read(xrcd_uobj); - put_uobj_write(&obj->uevent.uobject); + uobj_alloc_abort(&obj->uevent.uobject); return ret; } @@ -2295,7 +1792,7 @@ ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file, goto out; } - qp = idr_read_qp(cmd.qp_handle, file->ucontext); + qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext); if (!qp) { ret = -EINVAL; goto out; @@ -2303,7 +1800,7 @@ ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file, ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr); - put_qp_read(qp); + uobj_put_obj_read(qp); if (ret) goto out; @@ -2399,7 +1896,7 @@ static int modify_qp(struct ib_uverbs_file *file, if (!attr) return -ENOMEM; - qp = idr_read_qp(cmd->base.qp_handle, file->ucontext); + qp = uobj_get_obj_read(qp, cmd->base.qp_handle, file->ucontext); if (!qp) { ret = -EINVAL; goto out; @@ -2471,7 +1968,7 @@ static int modify_qp(struct ib_uverbs_file *file, } release_qp: - put_qp_read(qp); + uobj_put_obj_read(qp); out: kfree(attr); @@ -2558,42 +2055,27 @@ ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file, memset(&resp, 0, sizeof resp); - uobj = idr_write_uobj(cmd.qp_handle, file->ucontext); - if (!uobj) - return -EINVAL; + uobj = uobj_get_write(uobj_get_type(qp), cmd.qp_handle, + file->ucontext); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); + qp = uobj->object; obj = container_of(uobj, struct ib_uqp_object, uevent.uobject); + /* + * Make sure we don't free the memory in remove_commit as we still + * needs the uobject memory to create the response. + */ + uverbs_uobject_get(uobj); - if (!list_empty(&obj->mcast_list)) { - put_uobj_write(uobj); - return -EBUSY; - } - - ret = ib_destroy_qp(qp); - if (!ret) - uobj->live = 0; - - put_uobj_write(uobj); - - if (ret) + ret = uobj_remove_commit(uobj); + if (ret) { + uverbs_uobject_put(uobj); return ret; - - ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMACG_RESOURCE_HCA_OBJECT); - - if (obj->uxrcd) - atomic_dec(&obj->uxrcd->refcnt); - - idr_remove_uobj(uobj); - - mutex_lock(&file->mutex); - list_del(&uobj->list); - mutex_unlock(&file->mutex); - - ib_uverbs_release_uevent(file, &obj->uevent); + } resp.events_reported = obj->uevent.events_reported; - - put_uobj(uobj); + uverbs_uobject_put(uobj); if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) @@ -2637,7 +2119,7 @@ ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file, if (!user_wr) return -ENOMEM; - qp = idr_read_qp(cmd.qp_handle, file->ucontext); + qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext); if (!qp) goto out; @@ -2673,7 +2155,8 @@ ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file, goto out_put; } - ud->ah = idr_read_ah(user_wr->wr.ud.ah, file->ucontext); + ud->ah = uobj_get_obj_read(ah, user_wr->wr.ud.ah, + file->ucontext); if (!ud->ah) { kfree(ud); ret = -EINVAL; @@ -2780,11 +2263,11 @@ ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file, ret = -EFAULT; out_put: - put_qp_read(qp); + uobj_put_obj_read(qp); while (wr) { if (is_ud && ud_wr(wr)->ah) - put_ah_read(ud_wr(wr)->ah); + uobj_put_obj_read(ud_wr(wr)->ah); next = wr->next; kfree(wr); wr = next; @@ -2901,21 +2384,21 @@ ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file, if (IS_ERR(wr)) return PTR_ERR(wr); - qp = idr_read_qp(cmd.qp_handle, file->ucontext); + qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext); if (!qp) goto out; resp.bad_wr = 0; ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr); - put_qp_read(qp); - - if (ret) + uobj_put_obj_read(qp); + if (ret) { for (next = wr; next; next = next->next) { ++resp.bad_wr; if (next == bad_wr) break; } + } if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp)) @@ -2951,14 +2434,14 @@ ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file, if (IS_ERR(wr)) return PTR_ERR(wr); - srq = idr_read_srq(cmd.srq_handle, file->ucontext); + srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext); if (!srq) goto out; resp.bad_wr = 0; ret = srq->device->post_srq_recv(srq, wr, &bad_wr); - put_srq_read(srq); + uobj_put_obj_read(srq); if (ret) for (next = wr; next; next = next->next) { @@ -3005,14 +2488,11 @@ ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file, (unsigned long)cmd.response + sizeof(resp), in_len - sizeof(cmd), out_len - sizeof(resp)); - uobj = kmalloc(sizeof *uobj, GFP_KERNEL); - if (!uobj) - return -ENOMEM; - - init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class); - down_write(&uobj->mutex); + uobj = uobj_alloc(uobj_get_type(ah), file->ucontext); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); - pd = idr_read_pd(cmd.pd_handle, file->ucontext); + pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext); if (!pd) { ret = -EINVAL; goto err; @@ -3031,28 +2511,20 @@ ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file, memset(&attr.dmac, 0, sizeof(attr.dmac)); memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16); - ret = ib_rdmacg_try_charge(&uobj->cg_obj, ib_dev, - RDMACG_RESOURCE_HCA_OBJECT); - if (ret) - goto err_charge; - ah = pd->device->create_ah(pd, &attr, &udata); if (IS_ERR(ah)) { ret = PTR_ERR(ah); - goto err_create; + goto err_put; } ah->device = pd->device; ah->pd = pd; atomic_inc(&pd->usecnt); ah->uobject = uobj; + uobj->user_handle = cmd.user_handle; uobj->object = ah; - ret = idr_add_uobj(uobj); - if (ret) - goto err_destroy; - resp.ah_handle = uobj->id; if (copy_to_user((void __user *) (unsigned long) cmd.response, @@ -3061,32 +2533,19 @@ ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file, goto err_copy; } - put_pd_read(pd); - - mutex_lock(&file->mutex); - list_add_tail(&uobj->list, &file->ucontext->ah_list); - mutex_unlock(&file->mutex); - - uobj->live = 1; - - up_write(&uobj->mutex); + uobj_put_obj_read(pd); + uobj_alloc_commit(uobj); return in_len; err_copy: - idr_remove_uobj(uobj); - -err_destroy: ib_destroy_ah(ah); -err_create: - ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMACG_RESOURCE_HCA_OBJECT); - -err_charge: - put_pd_read(pd); +err_put: + uobj_put_obj_read(pd); err: - put_uobj_write(uobj); + uobj_alloc_abort(uobj); return ret; } @@ -3095,37 +2554,19 @@ ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file, const char __user *buf, int in_len, int out_len) { struct ib_uverbs_destroy_ah cmd; - struct ib_ah *ah; struct ib_uobject *uobj; int ret; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; - uobj = idr_write_uobj(cmd.ah_handle, file->ucontext); - if (!uobj) - return -EINVAL; - ah = uobj->object; - - ret = ib_destroy_ah(ah); - if (!ret) - uobj->live = 0; - - put_uobj_write(uobj); - - if (ret) - return ret; - - ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMACG_RESOURCE_HCA_OBJECT); - idr_remove_uobj(uobj); - - mutex_lock(&file->mutex); - list_del(&uobj->list); - mutex_unlock(&file->mutex); + uobj = uobj_get_write(uobj_get_type(ah), cmd.ah_handle, + file->ucontext); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); - put_uobj(uobj); - - return in_len; + ret = uobj_remove_commit(uobj); + return ret ?: in_len; } ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file, @@ -3142,7 +2583,7 @@ ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file, if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; - qp = idr_write_qp(cmd.qp_handle, file->ucontext); + qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext); if (!qp) return -EINVAL; @@ -3171,7 +2612,7 @@ ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file, kfree(mcast); out_put: - put_qp_write(qp); + uobj_put_obj_read(qp); return ret ? ret : in_len; } @@ -3190,16 +2631,16 @@ ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file, if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; - qp = idr_write_qp(cmd.qp_handle, file->ucontext); + qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext); if (!qp) return -EINVAL; + obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject); + ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid); if (ret) goto out_put; - obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject); - list_for_each_entry(mcast, &obj->mcast_list, list) if (cmd.mlid == mcast->lid && !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) { @@ -3209,8 +2650,7 @@ ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file, } out_put: - put_qp_write(qp); - + uobj_put_obj_read(qp); return ret ? ret : in_len; } @@ -3402,20 +2842,18 @@ int ib_uverbs_ex_create_wq(struct ib_uverbs_file *file, if (cmd.comp_mask) return -EOPNOTSUPP; - obj = kmalloc(sizeof(*obj), GFP_KERNEL); - if (!obj) - return -ENOMEM; + obj = (struct ib_uwq_object *)uobj_alloc(uobj_get_type(wq), + file->ucontext); + if (IS_ERR(obj)) + return PTR_ERR(obj); - init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, - &wq_lock_class); - down_write(&obj->uevent.uobject.mutex); - pd = idr_read_pd(cmd.pd_handle, file->ucontext); + pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext); if (!pd) { err = -EINVAL; goto err_uobj; } - cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0); + cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext); if (!cq) { err = -EINVAL; goto err_put_pd; @@ -3450,9 +2888,6 @@ int ib_uverbs_ex_create_wq(struct ib_uverbs_file *file, atomic_inc(&cq->usecnt); wq->uobject = &obj->uevent.uobject; obj->uevent.uobject.object = wq; - err = idr_add_uobj(&obj->uevent.uobject); - if (err) - goto destroy_wq; memset(&resp, 0, sizeof(resp)); resp.wq_handle = obj->uevent.uobject.id; @@ -3465,27 +2900,19 @@ int ib_uverbs_ex_create_wq(struct ib_uverbs_file *file, if (err) goto err_copy; - put_pd_read(pd); - put_cq_read(cq); - - mutex_lock(&file->mutex); - list_add_tail(&obj->uevent.uobject.list, &file->ucontext->wq_list); - mutex_unlock(&file->mutex); - - obj->uevent.uobject.live = 1; - up_write(&obj->uevent.uobject.mutex); + uobj_put_obj_read(pd); + uobj_put_obj_read(cq); + uobj_alloc_commit(&obj->uevent.uobject); return 0; err_copy: - idr_remove_uobj(&obj->uevent.uobject); -destroy_wq: ib_destroy_wq(wq); err_put_cq: - put_cq_read(cq); + uobj_put_obj_read(cq); err_put_pd: - put_pd_read(pd); + uobj_put_obj_read(pd); err_uobj: - put_uobj_write(&obj->uevent.uobject); + uobj_alloc_abort(&obj->uevent.uobject); return err; } @@ -3526,31 +2953,27 @@ int ib_uverbs_ex_destroy_wq(struct ib_uverbs_file *file, return -EOPNOTSUPP; resp.response_length = required_resp_len; - uobj = idr_write_uobj(cmd.wq_handle, - file->ucontext); - if (!uobj) - return -EINVAL; + uobj = uobj_get_write(uobj_get_type(wq), cmd.wq_handle, + file->ucontext); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); wq = uobj->object; obj = container_of(uobj, struct ib_uwq_object, uevent.uobject); - ret = ib_destroy_wq(wq); - if (!ret) - uobj->live = 0; + /* + * Make sure we don't free the memory in remove_commit as we still + * needs the uobject memory to create the response. + */ + uverbs_uobject_get(uobj); - put_uobj_write(uobj); - if (ret) + ret = uobj_remove_commit(uobj); + if (ret) { + uverbs_uobject_put(uobj); return ret; + } - idr_remove_uobj(uobj); - - mutex_lock(&file->mutex); - list_del(&uobj->list); - mutex_unlock(&file->mutex); - - ib_uverbs_release_uevent(file, &obj->uevent); resp.events_reported = obj->uevent.events_reported; - put_uobj(uobj); - + uverbs_uobject_put(uobj); ret = ib_copy_to_udata(ucore, &resp, resp.response_length); if (ret) return ret; @@ -3588,7 +3011,7 @@ int ib_uverbs_ex_modify_wq(struct ib_uverbs_file *file, if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS)) return -EINVAL; - wq = idr_read_wq(cmd.wq_handle, file->ucontext); + wq = uobj_get_obj_read(wq, cmd.wq_handle, file->ucontext); if (!wq) return -EINVAL; @@ -3599,7 +3022,7 @@ int ib_uverbs_ex_modify_wq(struct ib_uverbs_file *file, wq_attr.flags_mask = cmd.flags_mask; } ret = wq->device->modify_wq(wq, &wq_attr, cmd.attr_mask, uhw); - put_wq_read(wq); + uobj_put_obj_read(wq); return ret; } @@ -3677,7 +3100,8 @@ int ib_uverbs_ex_create_rwq_ind_table(struct ib_uverbs_file *file, for (num_read_wqs = 0; num_read_wqs < num_wq_handles; num_read_wqs++) { - wq = idr_read_wq(wqs_handles[num_read_wqs], file->ucontext); + wq = uobj_get_obj_read(wq, wqs_handles[num_read_wqs], + file->ucontext); if (!wq) { err = -EINVAL; goto put_wqs; @@ -3686,14 +3110,12 @@ int ib_uverbs_ex_create_rwq_ind_table(struct ib_uverbs_file *file, wqs[num_read_wqs] = wq; } - uobj = kmalloc(sizeof(*uobj), GFP_KERNEL); - if (!uobj) { - err = -ENOMEM; + uobj = uobj_alloc(uobj_get_type(rwq_ind_table), file->ucontext); + if (IS_ERR(uobj)) { + err = PTR_ERR(uobj); goto put_wqs; } - init_uobj(uobj, 0, file->ucontext, &rwq_ind_table_lock_class); - down_write(&uobj->mutex); init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size; init_attr.ind_tbl = wqs; rwq_ind_tbl = ib_dev->create_rwq_ind_table(ib_dev, &init_attr, uhw); @@ -3713,10 +3135,6 @@ int ib_uverbs_ex_create_rwq_ind_table(struct ib_uverbs_file *file, for (i = 0; i < num_wq_handles; i++) atomic_inc(&wqs[i]->usecnt); - err = idr_add_uobj(uobj); - if (err) - goto destroy_ind_tbl; - resp.ind_tbl_handle = uobj->id; resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num; resp.response_length = required_resp_len; @@ -3729,26 +3147,18 @@ int ib_uverbs_ex_create_rwq_ind_table(struct ib_uverbs_file *file, kfree(wqs_handles); for (j = 0; j < num_read_wqs; j++) - put_wq_read(wqs[j]); - - mutex_lock(&file->mutex); - list_add_tail(&uobj->list, &file->ucontext->rwq_ind_tbl_list); - mutex_unlock(&file->mutex); + uobj_put_obj_read(wqs[j]); - uobj->live = 1; - - up_write(&uobj->mutex); + uobj_alloc_commit(uobj); return 0; err_copy: - idr_remove_uobj(uobj); -destroy_ind_tbl: ib_destroy_rwq_ind_table(rwq_ind_tbl); err_uobj: - put_uobj_write(uobj); + uobj_alloc_abort(uobj); put_wqs: for (j = 0; j < num_read_wqs; j++) - put_wq_read(wqs[j]); + uobj_put_obj_read(wqs[j]); err_free: kfree(wqs_handles); kfree(wqs); @@ -3761,10 +3171,8 @@ int ib_uverbs_ex_destroy_rwq_ind_table(struct ib_uverbs_file *file, struct ib_udata *uhw) { struct ib_uverbs_ex_destroy_rwq_ind_table cmd = {}; - struct ib_rwq_ind_table *rwq_ind_tbl; struct ib_uobject *uobj; int ret; - struct ib_wq **ind_tbl; size_t required_cmd_sz; required_cmd_sz = offsetof(typeof(cmd), ind_tbl_handle) + sizeof(cmd.ind_tbl_handle); @@ -3784,31 +3192,12 @@ int ib_uverbs_ex_destroy_rwq_ind_table(struct ib_uverbs_file *file, if (cmd.comp_mask) return -EOPNOTSUPP; - uobj = idr_write_uobj(cmd.ind_tbl_handle, - file->ucontext); - if (!uobj) - return -EINVAL; - rwq_ind_tbl = uobj->object; - ind_tbl = rwq_ind_tbl->ind_tbl; - - ret = ib_destroy_rwq_ind_table(rwq_ind_tbl); - if (!ret) - uobj->live = 0; - - put_uobj_write(uobj); - - if (ret) - return ret; - - idr_remove_uobj(uobj); - - mutex_lock(&file->mutex); - list_del(&uobj->list); - mutex_unlock(&file->mutex); + uobj = uobj_get_write(uobj_get_type(rwq_ind_table), cmd.ind_tbl_handle, + file->ucontext); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); - put_uobj(uobj); - kfree(ind_tbl); - return ret; + return uobj_remove_commit(uobj); } int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file, @@ -3882,15 +3271,13 @@ int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file, kern_flow_attr = &cmd.flow_attr; } - uobj = kmalloc(sizeof(*uobj), GFP_KERNEL); - if (!uobj) { - err = -ENOMEM; + uobj = uobj_alloc(uobj_get_type(flow), file->ucontext); + if (IS_ERR(uobj)) { + err = PTR_ERR(uobj); goto err_free_attr; } - init_uobj(uobj, 0, file->ucontext, &rule_lock_class); - down_write(&uobj->mutex); - qp = idr_read_qp(cmd.qp_handle, file->ucontext); + qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext); if (!qp) { err = -EINVAL; goto err_uobj; @@ -3931,24 +3318,14 @@ int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file, err = -EINVAL; goto err_free; } - - err = ib_rdmacg_try_charge(&uobj->cg_obj, ib_dev, - RDMACG_RESOURCE_HCA_OBJECT); - if (err) - goto err_free; - flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER); if (IS_ERR(flow_id)) { err = PTR_ERR(flow_id); - goto err_create; + goto err_free; } flow_id->uobject = uobj; uobj->object = flow_id; - err = idr_add_uobj(uobj); - if (err) - goto destroy_flow; - memset(&resp, 0, sizeof(resp)); resp.flow_handle = uobj->id; @@ -3957,30 +3334,20 @@ int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file, if (err) goto err_copy; - put_qp_read(qp); - mutex_lock(&file->mutex); - list_add_tail(&uobj->list, &file->ucontext->rule_list); - mutex_unlock(&file->mutex); - - uobj->live = 1; - - up_write(&uobj->mutex); + uobj_put_obj_read(qp); + uobj_alloc_commit(uobj); kfree(flow_attr); if (cmd.flow_attr.num_of_specs) kfree(kern_flow_attr); return 0; err_copy: - idr_remove_uobj(uobj); -destroy_flow: ib_destroy_flow(flow_id); -err_create: - ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMACG_RESOURCE_HCA_OBJECT); err_free: kfree(flow_attr); err_put: - put_qp_read(qp); + uobj_put_obj_read(qp); err_uobj: - put_uobj_write(uobj); + uobj_alloc_abort(uobj); err_free_attr: if (cmd.flow_attr.num_of_specs) kfree(kern_flow_attr); @@ -3993,7 +3360,6 @@ int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file, struct ib_udata *uhw) { struct ib_uverbs_destroy_flow cmd; - struct ib_flow *flow_id; struct ib_uobject *uobj; int ret; @@ -4007,28 +3373,12 @@ int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file, if (cmd.comp_mask) return -EINVAL; - uobj = idr_write_uobj(cmd.flow_handle, file->ucontext); - if (!uobj) - return -EINVAL; - flow_id = uobj->object; - - ret = ib_destroy_flow(flow_id); - if (!ret) { - ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, - RDMACG_RESOURCE_HCA_OBJECT); - uobj->live = 0; - } - - put_uobj_write(uobj); - - idr_remove_uobj(uobj); - - mutex_lock(&file->mutex); - list_del(&uobj->list); - mutex_unlock(&file->mutex); - - put_uobj(uobj); + uobj = uobj_get_write(uobj_get_type(flow), cmd.flow_handle, + file->ucontext); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); + ret = uobj_remove_commit(uobj); return ret; } @@ -4045,31 +3395,37 @@ static int __uverbs_create_xsrq(struct ib_uverbs_file *file, struct ib_srq_init_attr attr; int ret; - obj = kmalloc(sizeof *obj, GFP_KERNEL); - if (!obj) - return -ENOMEM; - - init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class); - down_write(&obj->uevent.uobject.mutex); + obj = (struct ib_usrq_object *)uobj_alloc(uobj_get_type(srq), + file->ucontext); + if (IS_ERR(obj)) + return PTR_ERR(obj); if (cmd->srq_type == IB_SRQT_XRC) { - attr.ext.xrc.xrcd = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj); - if (!attr.ext.xrc.xrcd) { + xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd->xrcd_handle, + file->ucontext); + if (IS_ERR(xrcd_uobj)) { ret = -EINVAL; goto err; } + attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object; + if (!attr.ext.xrc.xrcd) { + ret = -EINVAL; + goto err_put_xrcd; + } + obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject); atomic_inc(&obj->uxrcd->refcnt); - attr.ext.xrc.cq = idr_read_cq(cmd->cq_handle, file->ucontext, 0); + attr.ext.xrc.cq = uobj_get_obj_read(cq, cmd->cq_handle, + file->ucontext); if (!attr.ext.xrc.cq) { ret = -EINVAL; goto err_put_xrcd; } } - pd = idr_read_pd(cmd->pd_handle, file->ucontext); + pd = uobj_get_obj_read(pd, cmd->pd_handle, file->ucontext); if (!pd) { ret = -EINVAL; goto err_put_cq; @@ -4085,11 +3441,6 @@ static int __uverbs_create_xsrq(struct ib_uverbs_file *file, obj->uevent.events_reported = 0; INIT_LIST_HEAD(&obj->uevent.event_list); - ret = ib_rdmacg_try_charge(&obj->uevent.uobject.cg_obj, ib_dev, - RDMACG_RESOURCE_HCA_OBJECT); - if (ret) - goto err_put_cq; - srq = pd->device->create_srq(pd, &attr, udata); if (IS_ERR(srq)) { ret = PTR_ERR(srq); @@ -4114,9 +3465,7 @@ static int __uverbs_create_xsrq(struct ib_uverbs_file *file, atomic_set(&srq->usecnt, 0); obj->uevent.uobject.object = srq; - ret = idr_add_uobj(&obj->uevent.uobject); - if (ret) - goto err_destroy; + obj->uevent.uobject.user_handle = cmd->user_handle; memset(&resp, 0, sizeof resp); resp.srq_handle = obj->uevent.uobject.id; @@ -4132,44 +3481,32 @@ static int __uverbs_create_xsrq(struct ib_uverbs_file *file, } if (cmd->srq_type == IB_SRQT_XRC) { - put_uobj_read(xrcd_uobj); - put_cq_read(attr.ext.xrc.cq); + uobj_put_read(xrcd_uobj); + uobj_put_obj_read(attr.ext.xrc.cq); } - put_pd_read(pd); - - mutex_lock(&file->mutex); - list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list); - mutex_unlock(&file->mutex); - - obj->uevent.uobject.live = 1; - - up_write(&obj->uevent.uobject.mutex); + uobj_put_obj_read(pd); + uobj_alloc_commit(&obj->uevent.uobject); return 0; err_copy: - idr_remove_uobj(&obj->uevent.uobject); - -err_destroy: ib_destroy_srq(srq); err_put: - ib_rdmacg_uncharge(&obj->uevent.uobject.cg_obj, ib_dev, - RDMACG_RESOURCE_HCA_OBJECT); - put_pd_read(pd); + uobj_put_obj_read(pd); err_put_cq: if (cmd->srq_type == IB_SRQT_XRC) - put_cq_read(attr.ext.xrc.cq); + uobj_put_obj_read(attr.ext.xrc.cq); err_put_xrcd: if (cmd->srq_type == IB_SRQT_XRC) { atomic_dec(&obj->uxrcd->refcnt); - put_uobj_read(xrcd_uobj); + uobj_put_read(xrcd_uobj); } err: - put_uobj_write(&obj->uevent.uobject); + uobj_alloc_abort(&obj->uevent.uobject); return ret; } @@ -4254,7 +3591,7 @@ ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file, INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd, out_len); - srq = idr_read_srq(cmd.srq_handle, file->ucontext); + srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext); if (!srq) return -EINVAL; @@ -4263,7 +3600,7 @@ ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file, ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata); - put_srq_read(srq); + uobj_put_obj_read(srq); return ret ? ret : in_len; } @@ -4285,13 +3622,13 @@ ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file, if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; - srq = idr_read_srq(cmd.srq_handle, file->ucontext); + srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext); if (!srq) return -EINVAL; ret = ib_query_srq(srq, &attr); - put_srq_read(srq); + uobj_put_obj_read(srq); if (ret) return ret; @@ -4320,53 +3657,39 @@ ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file, struct ib_srq *srq; struct ib_uevent_object *obj; int ret = -EINVAL; - struct ib_usrq_object *us; enum ib_srq_type srq_type; if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; - uobj = idr_write_uobj(cmd.srq_handle, file->ucontext); - if (!uobj) - return -EINVAL; + uobj = uobj_get_write(uobj_get_type(srq), cmd.srq_handle, + file->ucontext); + if (IS_ERR(uobj)) + return PTR_ERR(uobj); + srq = uobj->object; obj = container_of(uobj, struct ib_uevent_object, uobject); srq_type = srq->srq_type; + /* + * Make sure we don't free the memory in remove_commit as we still + * needs the uobject memory to create the response. + */ + uverbs_uobject_get(uobj); - ret = ib_destroy_srq(srq); - if (!ret) - uobj->live = 0; - - put_uobj_write(uobj); + memset(&resp, 0, sizeof(resp)); - if (ret) + ret = uobj_remove_commit(uobj); + if (ret) { + uverbs_uobject_put(uobj); return ret; - - ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMACG_RESOURCE_HCA_OBJECT); - - if (srq_type == IB_SRQT_XRC) { - us = container_of(obj, struct ib_usrq_object, uevent); - atomic_dec(&us->uxrcd->refcnt); } - - idr_remove_uobj(uobj); - - mutex_lock(&file->mutex); - list_del(&uobj->list); - mutex_unlock(&file->mutex); - - ib_uverbs_release_uevent(file, obj); - - memset(&resp, 0, sizeof resp); resp.events_reported = obj->events_reported; + uverbs_uobject_put(uobj); + if (copy_to_user((void __user *)(unsigned long)cmd.response, + &resp, sizeof(resp))) + return -EFAULT; - put_uobj(uobj); - - if (copy_to_user((void __user *) (unsigned long) cmd.response, - &resp, sizeof resp)) - ret = -EFAULT; - - return ret ? ret : in_len; + return in_len; } int ib_uverbs_ex_query_device(struct ib_uverbs_file *file, diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c index e1db678..7ccb525 100644 --- a/drivers/infiniband/core/uverbs_main.c +++ b/drivers/infiniband/core/uverbs_main.c @@ -52,6 +52,7 @@ #include "uverbs.h" #include "core_priv.h" +#include "rdma_core.h" MODULE_AUTHOR("Roland Dreier"); MODULE_DESCRIPTION("InfiniBand userspace verbs access"); @@ -214,140 +215,11 @@ void ib_uverbs_detach_umcast(struct ib_qp *qp, } static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file, - struct ib_ucontext *context) + struct ib_ucontext *context, + bool device_removed) { - struct ib_uobject *uobj, *tmp; - context->closing = 1; - - list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) { - struct ib_ah *ah = uobj->object; - - idr_remove_uobj(uobj); - ib_destroy_ah(ah); - ib_rdmacg_uncharge(&uobj->cg_obj, context->device, - RDMACG_RESOURCE_HCA_OBJECT); - kfree(uobj); - } - - /* Remove MWs before QPs, in order to support type 2A MWs. */ - list_for_each_entry_safe(uobj, tmp, &context->mw_list, list) { - struct ib_mw *mw = uobj->object; - - idr_remove_uobj(uobj); - uverbs_dealloc_mw(mw); - ib_rdmacg_uncharge(&uobj->cg_obj, context->device, - RDMACG_RESOURCE_HCA_OBJECT); - kfree(uobj); - } - - list_for_each_entry_safe(uobj, tmp, &context->rule_list, list) { - struct ib_flow *flow_id = uobj->object; - - idr_remove_uobj(uobj); - ib_destroy_flow(flow_id); - ib_rdmacg_uncharge(&uobj->cg_obj, context->device, - RDMACG_RESOURCE_HCA_OBJECT); - kfree(uobj); - } - - list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) { - struct ib_qp *qp = uobj->object; - struct ib_uqp_object *uqp = - container_of(uobj, struct ib_uqp_object, uevent.uobject); - - idr_remove_uobj(uobj); - if (qp == qp->real_qp) - ib_uverbs_detach_umcast(qp, uqp); - ib_destroy_qp(qp); - ib_rdmacg_uncharge(&uobj->cg_obj, context->device, - RDMACG_RESOURCE_HCA_OBJECT); - ib_uverbs_release_uevent(file, &uqp->uevent); - kfree(uqp); - } - - list_for_each_entry_safe(uobj, tmp, &context->rwq_ind_tbl_list, list) { - struct ib_rwq_ind_table *rwq_ind_tbl = uobj->object; - struct ib_wq **ind_tbl = rwq_ind_tbl->ind_tbl; - - idr_remove_uobj(uobj); - ib_destroy_rwq_ind_table(rwq_ind_tbl); - kfree(ind_tbl); - kfree(uobj); - } - - list_for_each_entry_safe(uobj, tmp, &context->wq_list, list) { - struct ib_wq *wq = uobj->object; - struct ib_uwq_object *uwq = - container_of(uobj, struct ib_uwq_object, uevent.uobject); - - idr_remove_uobj(uobj); - ib_destroy_wq(wq); - ib_uverbs_release_uevent(file, &uwq->uevent); - kfree(uwq); - } - - list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) { - struct ib_srq *srq = uobj->object; - struct ib_uevent_object *uevent = - container_of(uobj, struct ib_uevent_object, uobject); - - idr_remove_uobj(uobj); - ib_destroy_srq(srq); - ib_rdmacg_uncharge(&uobj->cg_obj, context->device, - RDMACG_RESOURCE_HCA_OBJECT); - ib_uverbs_release_uevent(file, uevent); - kfree(uevent); - } - - list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) { - struct ib_cq *cq = uobj->object; - struct ib_uverbs_event_file *ev_file = cq->cq_context; - struct ib_ucq_object *ucq = - container_of(uobj, struct ib_ucq_object, uobject); - - idr_remove_uobj(uobj); - ib_destroy_cq(cq); - ib_rdmacg_uncharge(&uobj->cg_obj, context->device, - RDMACG_RESOURCE_HCA_OBJECT); - ib_uverbs_release_ucq(file, ev_file, ucq); - kfree(ucq); - } - - list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) { - struct ib_mr *mr = uobj->object; - - idr_remove_uobj(uobj); - ib_dereg_mr(mr); - ib_rdmacg_uncharge(&uobj->cg_obj, context->device, - RDMACG_RESOURCE_HCA_OBJECT); - kfree(uobj); - } - - mutex_lock(&file->device->xrcd_tree_mutex); - list_for_each_entry_safe(uobj, tmp, &context->xrcd_list, list) { - struct ib_xrcd *xrcd = uobj->object; - struct ib_uxrcd_object *uxrcd = - container_of(uobj, struct ib_uxrcd_object, uobject); - - idr_remove_uobj(uobj); - ib_uverbs_dealloc_xrcd(file->device, xrcd, - file->ucontext ? RDMA_REMOVE_CLOSE : - RDMA_REMOVE_DRIVER_REMOVE); - kfree(uxrcd); - } - mutex_unlock(&file->device->xrcd_tree_mutex); - - list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) { - struct ib_pd *pd = uobj->object; - - idr_remove_uobj(uobj); - ib_dealloc_pd(pd); - ib_rdmacg_uncharge(&uobj->cg_obj, context->device, - RDMACG_RESOURCE_HCA_OBJECT); - kfree(uobj); - } - + uverbs_cleanup_ucontext(context, device_removed); put_pid(context->tgid); ib_rdmacg_uncharge(&context->cg_obj, context->device, @@ -592,7 +464,7 @@ void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr) struct ib_uevent_object *uobj; /* for XRC target qp's, check that qp is live */ - if (!event->element.qp->uobject || !event->element.qp->uobject->live) + if (!event->element.qp->uobject) return; uobj = container_of(event->element.qp->uobject, @@ -1010,7 +882,7 @@ static int ib_uverbs_close(struct inode *inode, struct file *filp) mutex_lock(&file->cleanup_mutex); if (file->ucontext) { - ib_uverbs_cleanup_ucontext(file, file->ucontext); + ib_uverbs_cleanup_ucontext(file, file->ucontext, false); file->ucontext = NULL; } mutex_unlock(&file->cleanup_mutex); @@ -1260,7 +1132,7 @@ static void ib_uverbs_free_hw_resources(struct ib_uverbs_device *uverbs_dev, * (e.g mmput). */ ib_dev->disassociate_ucontext(ucontext); - ib_uverbs_cleanup_ucontext(file, ucontext); + ib_uverbs_cleanup_ucontext(file, ucontext, true); } mutex_lock(&uverbs_dev->lists_mutex); diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index d3efd22..2e8f661 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -1377,17 +1377,6 @@ struct ib_rdmacg_object { struct ib_ucontext { struct ib_device *device; struct ib_uverbs_file *ufile; - struct list_head pd_list; - struct list_head mr_list; - struct list_head mw_list; - struct list_head cq_list; - struct list_head qp_list; - struct list_head srq_list; - struct list_head ah_list; - struct list_head xrcd_list; - struct list_head rule_list; - struct list_head wq_list; - struct list_head rwq_ind_tbl_list; int closing; /* locking the uobjects_list */ @@ -1426,10 +1415,8 @@ struct ib_uobject { struct ib_rdmacg_object cg_obj; /* rdmacg object */ int id; /* index into kernel idr */ struct kref ref; - struct rw_semaphore mutex; /* protects .live */ atomic_t usecnt; /* protects exclusive access */ struct rcu_head rcu; /* kfree_rcu() overhead */ - int live; const struct uverbs_obj_type *type; }; diff --git a/include/rdma/uverbs_std_types.h b/include/rdma/uverbs_std_types.h index 2edb776..8885664 100644 --- a/include/rdma/uverbs_std_types.h +++ b/include/rdma/uverbs_std_types.h @@ -46,5 +46,68 @@ extern const struct uverbs_obj_idr_type uverbs_type_attrs_mw; extern const struct uverbs_obj_idr_type uverbs_type_attrs_pd; extern const struct uverbs_obj_idr_type uverbs_type_attrs_xrcd; + +static inline struct ib_uobject *__uobj_get(const struct uverbs_obj_type *type, + bool write, + struct ib_ucontext *ucontext, + int id) +{ + return rdma_lookup_get_uobject(type, ucontext, id, write); +} + +#define uobj_get_type(_type) uverbs_type_attrs_##_type.type + +#define uobj_get_read(_type, _id, _ucontext) \ + __uobj_get(&(_type), false, _ucontext, _id) + +#define uobj_get_obj_read(_type, _id, _ucontext) \ +({ \ + struct ib_uobject *uobj = \ + __uobj_get(&uobj_get_type(_type), \ + false, _ucontext, _id); \ + \ + (struct ib_##_type *)(IS_ERR(uobj) ? NULL : uobj->object); \ +}) + +#define uobj_get_write(_type, _id, _ucontext) \ + __uobj_get(&(_type), true, _ucontext, _id) + +static inline void uobj_put_read(struct ib_uobject *uobj) +{ + rdma_lookup_put_uobject(uobj, false); +} + +#define uobj_put_obj_read(_obj) \ + uobj_put_read((_obj)->uobject) + +static inline void uobj_put_write(struct ib_uobject *uobj) +{ + rdma_lookup_put_uobject(uobj, true); +} + +static inline int __must_check uobj_remove_commit(struct ib_uobject *uobj) +{ + return rdma_remove_commit_uobject(uobj); +} + +static inline void uobj_alloc_commit(struct ib_uobject *uobj) +{ + rdma_alloc_commit_uobject(uobj); +} + +static inline void uobj_alloc_abort(struct ib_uobject *uobj) +{ + rdma_alloc_abort_uobject(uobj); +} + +static inline struct ib_uobject *__uobj_alloc(const struct uverbs_obj_type *type, + struct ib_ucontext *ucontext) +{ + return rdma_alloc_begin_uobject(type, ucontext); +} + +#define uobj_alloc(_type, ucontext) \ + __uobj_alloc(&(_type), ucontext) + #endif

[V3,for-next,4/7] IB/core: Change idr objects to use the new schema

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