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RDMA/restrack: Rewrite PID namespace check to be reliable

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task_active_pid_ns() is wrong API to check PID namespace because it
posses some restrictions and return PID namespace where the process
was allocated. It created mismatches with current namespace, which
can be different.

Rewrite whole rdma_is_visible_in_pid_ns() logic to provide reliable
results without any relation to allocated PID namespace.

Fixes: 8be565e65f ("RDMA/nldev: Factor out the PID namespace check")
Fixes: 6a6c306a09 ("RDMA/restrack: Make is_visible_in_pid_ns() as an API")
Reviewed-by: Mark Zhang <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Doug Ledford <[email protected]>
This commit is contained in:
Leon Romanovsky 2019-08-15 11:38:29 +03:00 • committed by Doug Ledford
commit 60c78668ae
3 changed files with 9 additions and 12 deletions
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3
include/rdma/restrack.h
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@ -105,8 +105,7 @@ struct rdma_restrack_entry {
};
int rdma_restrack_count(struct ib_device *dev,
enum rdma_restrack_type type,
struct pid_namespace *ns);
enum rdma_restrack_type type);
void rdma_restrack_kadd(struct rdma_restrack_entry *res);
void rdma_restrack_uadd(struct rdma_restrack_entry *res);