forked from Minki/linux
IB/mlx5: Validate correct PD before prefetch MR
When prefetching odp mr it is required to verify that pd of the mr is
identical to the pd for which the advise_mr request arrived with.
This check was missing from synchronous flow and is added now.
Fixes: 813e90b1ae
("IB/mlx5: Add advise_mr() support")
Reported-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
parent
a6bc3875f1
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81dd4c4be3
@ -736,7 +736,8 @@ static int get_indirect_num_descs(struct mlx5_core_mkey *mmkey)
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* -EFAULT when there's an error mapping the requested pages. The caller will
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* abort the page fault handling.
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*/
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static int pagefault_single_data_segment(struct mlx5_ib_dev *dev, u32 key,
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static int pagefault_single_data_segment(struct mlx5_ib_dev *dev,
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struct ib_pd *pd, u32 key,
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u64 io_virt, size_t bcnt,
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u32 *bytes_committed,
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u32 *bytes_mapped, u32 flags)
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@ -779,10 +780,16 @@ next_mr:
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goto srcu_unlock;
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}
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if (prefetch && !is_odp_mr(mr)) {
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if (prefetch) {
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if (!is_odp_mr(mr) ||
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mr->ibmr.pd != pd) {
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mlx5_ib_dbg(dev, "Invalid prefetch request: %s\n",
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is_odp_mr(mr) ? "MR is not ODP" :
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"PD is not of the MR");
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ret = -EINVAL;
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goto srcu_unlock;
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}
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}
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if (!is_odp_mr(mr)) {
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mlx5_ib_dbg(dev, "skipping non ODP MR (lkey=0x%06x) in page fault handler.\n",
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@ -964,7 +971,8 @@ static int pagefault_data_segments(struct mlx5_ib_dev *dev,
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continue;
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}
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ret = pagefault_single_data_segment(dev, key, io_virt, bcnt,
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ret = pagefault_single_data_segment(dev, NULL, key,
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io_virt, bcnt,
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&pfault->bytes_committed,
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bytes_mapped, 0);
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if (ret < 0)
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@ -1331,7 +1339,7 @@ static void mlx5_ib_mr_rdma_pfault_handler(struct mlx5_ib_dev *dev,
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prefetch_len = min(MAX_PREFETCH_LEN, prefetch_len);
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}
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ret = pagefault_single_data_segment(dev, rkey, address, length,
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ret = pagefault_single_data_segment(dev, NULL, rkey, address, length,
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&pfault->bytes_committed, NULL,
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0);
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if (ret == -EAGAIN) {
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@ -1358,7 +1366,7 @@ static void mlx5_ib_mr_rdma_pfault_handler(struct mlx5_ib_dev *dev,
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if (prefetch_activated) {
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u32 bytes_committed = 0;
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ret = pagefault_single_data_segment(dev, rkey, address,
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ret = pagefault_single_data_segment(dev, NULL, rkey, address,
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prefetch_len,
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&bytes_committed, NULL,
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0);
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@ -1655,7 +1663,7 @@ int mlx5_ib_odp_init(void)
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struct prefetch_mr_work {
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struct work_struct work;
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struct mlx5_ib_dev *dev;
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struct ib_pd *pd;
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u32 pf_flags;
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u32 num_sge;
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struct ib_sge sg_list[0];
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@ -1727,17 +1735,18 @@ static bool num_pending_prefetch_inc(struct ib_pd *pd,
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return ret;
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}
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static int mlx5_ib_prefetch_sg_list(struct mlx5_ib_dev *dev, u32 pf_flags,
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static int mlx5_ib_prefetch_sg_list(struct ib_pd *pd, u32 pf_flags,
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struct ib_sge *sg_list, u32 num_sge)
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{
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u32 i;
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int ret = 0;
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struct mlx5_ib_dev *dev = to_mdev(pd->device);
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for (i = 0; i < num_sge; ++i) {
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struct ib_sge *sg = &sg_list[i];
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int bytes_committed = 0;
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ret = pagefault_single_data_segment(dev, sg->lkey, sg->addr,
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ret = pagefault_single_data_segment(dev, pd, sg->lkey, sg->addr,
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sg->length,
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&bytes_committed, NULL,
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pf_flags);
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@ -1753,13 +1762,14 @@ static void mlx5_ib_prefetch_mr_work(struct work_struct *work)
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struct prefetch_mr_work *w =
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container_of(work, struct prefetch_mr_work, work);
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if (ib_device_try_get(&w->dev->ib_dev)) {
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mlx5_ib_prefetch_sg_list(w->dev, w->pf_flags, w->sg_list,
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if (ib_device_try_get(w->pd->device)) {
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mlx5_ib_prefetch_sg_list(w->pd, w->pf_flags, w->sg_list,
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w->num_sge);
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ib_device_put(&w->dev->ib_dev);
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ib_device_put(w->pd->device);
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}
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num_pending_prefetch_dec(w->dev, w->sg_list, w->num_sge, 0);
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num_pending_prefetch_dec(to_mdev(w->pd->device), w->sg_list,
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w->num_sge, 0);
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kfree(w);
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}
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@ -1777,7 +1787,7 @@ int mlx5_ib_advise_mr_prefetch(struct ib_pd *pd,
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pf_flags |= MLX5_PF_FLAGS_DOWNGRADE;
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if (flags & IB_UVERBS_ADVISE_MR_FLAG_FLUSH)
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return mlx5_ib_prefetch_sg_list(dev, pf_flags, sg_list,
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return mlx5_ib_prefetch_sg_list(pd, pf_flags, sg_list,
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num_sge);
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work = kvzalloc(struct_size(work, sg_list, num_sge), GFP_KERNEL);
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@ -1786,7 +1796,11 @@ int mlx5_ib_advise_mr_prefetch(struct ib_pd *pd,
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memcpy(work->sg_list, sg_list, num_sge * sizeof(struct ib_sge));
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work->dev = dev;
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/* It is guaranteed that the pd when work is executed is the pd when
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* work was queued since pd can't be destroyed while it holds MRs and
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* destroying a MR leads to flushing the workquque
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*/
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work->pd = pd;
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work->pf_flags = pf_flags;
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work->num_sge = num_sge;
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