diff options
| author | Bob Pearson <rpearsonhpe@gmail.com> | 2021-06-08 07:25:53 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2021-06-17 02:51:19 +0300 |
| commit | 570d2b99d00d9e023328c0a0b8000ab485113384 (patch) | |
| tree | ee624e54f747317849c9d3ef97186ebdfdff91b9 | |
| parent | cdd0b85675aecc77eba8c38d55070a014a49ab98 (diff) | |
| download | linux-570d2b99d00d9e023328c0a0b8000ab485113384.tar.xz | |
RDMA/rxe: Disallow MR dereg and invalidate when bound
Check that an MR has no bound MWs before allowing a dereg or invalidate
operation.
Link: https://lore.kernel.org/r/20210608042552.33275-11-rpearsonhpe@gmail.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
| -rw-r--r-- | drivers/infiniband/sw/rxe/rxe_loc.h | 1 | ||||
| -rw-r--r-- | drivers/infiniband/sw/rxe/rxe_mr.c | 25 | ||||
| -rw-r--r-- | drivers/infiniband/sw/rxe/rxe_verbs.c | 11 |
3 files changed, 26 insertions, 11 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_loc.h b/drivers/infiniband/sw/rxe/rxe_loc.h index 6e4b5e22541e..1ddb20855dee 100644 --- a/drivers/infiniband/sw/rxe/rxe_loc.h +++ b/drivers/infiniband/sw/rxe/rxe_loc.h @@ -87,6 +87,7 @@ struct rxe_mr *lookup_mr(struct rxe_pd *pd, int access, u32 key, int mr_check_range(struct rxe_mr *mr, u64 iova, size_t length); int advance_dma_data(struct rxe_dma_info *dma, unsigned int length); int rxe_invalidate_mr(struct rxe_qp *qp, u32 rkey); +int rxe_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata); void rxe_mr_cleanup(struct rxe_pool_entry *arg); /* rxe_mw.c */ diff --git a/drivers/infiniband/sw/rxe/rxe_mr.c b/drivers/infiniband/sw/rxe/rxe_mr.c index 3fb58d2c7814..7f169329a8bf 100644 --- a/drivers/infiniband/sw/rxe/rxe_mr.c +++ b/drivers/infiniband/sw/rxe/rxe_mr.c @@ -546,6 +546,13 @@ int rxe_invalidate_mr(struct rxe_qp *qp, u32 rkey) goto err_drop_ref; } + if (atomic_read(&mr->num_mw) > 0) { + pr_warn("%s: Attempt to invalidate an MR while bound to MWs\n", + __func__); + ret = -EINVAL; + goto err_drop_ref; + } + mr->state = RXE_MR_STATE_FREE; ret = 0; @@ -555,6 +562,24 @@ err: return ret; } +int rxe_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata) +{ + struct rxe_mr *mr = to_rmr(ibmr); + + if (atomic_read(&mr->num_mw) > 0) { + pr_warn("%s: Attempt to deregister an MR while bound to MWs\n", + __func__); + return -EINVAL; + } + + mr->state = RXE_MR_STATE_ZOMBIE; + rxe_drop_ref(mr_pd(mr)); + rxe_drop_index(mr); + rxe_drop_ref(mr); + + return 0; +} + void rxe_mr_cleanup(struct rxe_pool_entry *arg) { struct rxe_mr *mr = container_of(arg, typeof(*mr), pelem); diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c index 94ae5175d225..a055d4c76f4c 100644 --- a/drivers/infiniband/sw/rxe/rxe_verbs.c +++ b/drivers/infiniband/sw/rxe/rxe_verbs.c @@ -959,17 +959,6 @@ err2: return ERR_PTR(err); } -static int rxe_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata) -{ - struct rxe_mr *mr = to_rmr(ibmr); - - mr->state = RXE_MR_STATE_ZOMBIE; - rxe_drop_ref(mr_pd(mr)); - rxe_drop_index(mr); - rxe_drop_ref(mr); - return 0; -} - static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type, u32 max_num_sg) { |