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RDMA: Provide safe ib_alloc_device() function

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All callers to ib_alloc_device() provide a larger size than struct
ib_device and rely on the fact that struct ib_device is embedded in their
driver specific structure as the first member.

Provide a safer variant of ib_alloc_device() that checks and enforces this
approach to make sure the drivers are using it right.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Leon Romanovsky
2019-01-30 12:49:11 +02:00
committed by Jason Gunthorpe
parent e5c1bb47cc
commit 459cc69fa4
19 changed files with 27 additions and 21 deletions
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8
include/rdma/ib_verbs.h
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@@ -2621,7 +2621,13 @@ struct ib_client {
struct list_head list;
};
struct ib_device *ib_alloc_device(size_t size);
struct ib_device *_ib_alloc_device(size_t size);
#define ib_alloc_device(drv_struct, member) \
container_of(_ib_alloc_device(sizeof(struct drv_struct) + \
BUILD_BUG_ON_ZERO(offsetof( \
struct drv_struct, member))), \
struct drv_struct, member)
void ib_dealloc_device(struct ib_device *device);
void ib_get_device_fw_str(struct ib_device *device, char *str);