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5224f79096
There is a regular need in the kernel to provide a way to declare
having a dynamically sized set of trailing elements in a structure.
Kernel code should always use “flexible array members”[1] for these
cases. The older style of one-element or zero-length arrays should
no longer be used[2].
This code was transformed with the help of Coccinelle:
(next-20220214$ spatch --jobs $(getconf _NPROCESSORS_ONLN) --sp-file script.cocci --include-headers --dir . > output.patch)
@@
identifier S, member, array;
type T1, T2;
@@
struct S {
...
T1 member;
T2 array[
- 0
];
};
UAPI and wireless changes were intentionally excluded from this patch
and will be sent out separately.
[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays
Link: https://github.com/KSPP/linux/issues/78
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
121 lines
2.0 KiB
C
121 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_S390_EADM_H
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#define _ASM_S390_EADM_H
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#include <linux/types.h>
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#include <linux/device.h>
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#include <linux/blk_types.h>
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struct arqb {
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u64 data;
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u16 fmt:4;
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u16:12;
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u16 cmd_code;
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u16:16;
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u16 msb_count;
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u32 reserved[12];
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} __packed;
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#define ARQB_CMD_MOVE 1
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struct arsb {
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u16 fmt:4;
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u32:28;
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u8 ef;
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u8:8;
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u8 ecbi;
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u8:8;
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u8 fvf;
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u16:16;
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u8 eqc;
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u32:32;
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u64 fail_msb;
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u64 fail_aidaw;
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u64 fail_ms;
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u64 fail_scm;
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u32 reserved[4];
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} __packed;
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#define EQC_WR_PROHIBIT 22
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struct msb {
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u8 fmt:4;
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u8 oc:4;
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u8 flags;
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u16:12;
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u16 bs:4;
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u32 blk_count;
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u64 data_addr;
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u64 scm_addr;
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u64:64;
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} __packed;
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struct aidaw {
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u8 flags;
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u32 :24;
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u32 :32;
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u64 data_addr;
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} __packed;
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#define MSB_OC_CLEAR 0
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#define MSB_OC_READ 1
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#define MSB_OC_WRITE 2
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#define MSB_OC_RELEASE 3
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#define MSB_FLAG_BNM 0x80
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#define MSB_FLAG_IDA 0x40
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#define MSB_BS_4K 0
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#define MSB_BS_1M 1
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#define AOB_NR_MSB 124
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struct aob {
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struct arqb request;
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struct arsb response;
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struct msb msb[AOB_NR_MSB];
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} __packed __aligned(PAGE_SIZE);
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struct aob_rq_header {
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struct scm_device *scmdev;
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char data[];
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};
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struct scm_device {
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u64 address;
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u64 size;
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unsigned int nr_max_block;
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struct device dev;
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struct {
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unsigned int persistence:4;
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unsigned int oper_state:4;
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unsigned int data_state:4;
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unsigned int rank:4;
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unsigned int release:1;
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unsigned int res_id:8;
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} __packed attrs;
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};
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#define OP_STATE_GOOD 1
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#define OP_STATE_TEMP_ERR 2
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#define OP_STATE_PERM_ERR 3
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enum scm_event {SCM_CHANGE, SCM_AVAIL};
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struct scm_driver {
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struct device_driver drv;
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int (*probe) (struct scm_device *scmdev);
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void (*remove) (struct scm_device *scmdev);
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void (*notify) (struct scm_device *scmdev, enum scm_event event);
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void (*handler) (struct scm_device *scmdev, void *data,
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blk_status_t error);
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};
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int scm_driver_register(struct scm_driver *scmdrv);
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void scm_driver_unregister(struct scm_driver *scmdrv);
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int eadm_start_aob(struct aob *aob);
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void scm_irq_handler(struct aob *aob, blk_status_t error);
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#endif /* _ASM_S390_EADM_H */
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