diff options
| author | Eli Cohen <eli@dev.mellanox.co.il> | 2013-10-31 13:26:32 (GMT) |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2013-11-15 18:25:32 (GMT) |
| commit | 1c636f801615bdfc9b1d46904e8258c7a025670b (patch) | |
| tree | 600ff4b245e9287489c6c4b8a3a132f5adae5eb9 | |
| parent | 180771a3707a4c0577cbf4f830c754dbabfdfccb (diff) | |
| download | linux-fsl-qoriq-1c636f801615bdfc9b1d46904e8258c7a025670b.tar.xz | |
IB/core: Encorce MR access rights rules on kernel consumers
Enforce the rule that when requesting remote write or atomic permissions, local
write must be indicated as well. See IB spec 11.2.8.2.
Spotted by: Hagay Abramovsky <hagaya@mellanox.com>
Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
| -rw-r--r-- | drivers/infiniband/core/uverbs_cmd.c | 10 | ||||
| -rw-r--r-- | drivers/infiniband/core/verbs.c | 14 | ||||
| -rw-r--r-- | include/rdma/ib_verbs.h | 13 |
3 files changed, 30 insertions, 7 deletions
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index 5bb2a82d..7f671b7 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -939,13 +939,9 @@ ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file, if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) return -EINVAL; - /* - * Local write permission is required if remote write or - * remote atomic permission is also requested. - */ - if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) && - !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE)) - return -EINVAL; + ret = ib_check_mr_access(cmd.access_flags); + if (ret) + return ret; uobj = kmalloc(sizeof *uobj, GFP_KERNEL); if (!uobj) diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c index 84f5027..d4f6ddf 100644 --- a/drivers/infiniband/core/verbs.c +++ b/drivers/infiniband/core/verbs.c @@ -961,6 +961,11 @@ EXPORT_SYMBOL(ib_resize_cq); struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags) { struct ib_mr *mr; + int err; + + err = ib_check_mr_access(mr_access_flags); + if (err) + return ERR_PTR(err); mr = pd->device->get_dma_mr(pd, mr_access_flags); @@ -983,6 +988,11 @@ struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd, u64 *iova_start) { struct ib_mr *mr; + int err; + + err = ib_check_mr_access(mr_access_flags); + if (err) + return ERR_PTR(err); if (!pd->device->reg_phys_mr) return ERR_PTR(-ENOSYS); @@ -1013,6 +1023,10 @@ int ib_rereg_phys_mr(struct ib_mr *mr, struct ib_pd *old_pd; int ret; + ret = ib_check_mr_access(mr_access_flags); + if (ret) + return ret; + if (!mr->device->rereg_phys_mr) return -ENOSYS; diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 60354d5..68c053d 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -2386,4 +2386,17 @@ struct ib_flow *ib_create_flow(struct ib_qp *qp, struct ib_flow_attr *flow_attr, int domain); int ib_destroy_flow(struct ib_flow *flow_id); +static inline int ib_check_mr_access(int flags) +{ + /* + * Local write permission is required if remote write or + * remote atomic permission is also requested. + */ + if (flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) && + !(flags & IB_ACCESS_LOCAL_WRITE)) + return -EINVAL; + + return 0; +} + #endif /* IB_VERBS_H */ |