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#ifndef _FS_CEPH_AUTH_X_H
#define _FS_CEPH_AUTH_X_H

#include <linux/rbtree.h>

#include <linux/ceph/auth.h>

#include "crypto.h"
#include "auth_x_protocol.h"

/*
 * Handle ticket for a single service.
 */
struct ceph_x_ticket_handler {
	struct rb_node node;
	unsigned int service;

	struct ceph_crypto_key session_key;
	bool have_key;

	u64 secret_id;
	struct ceph_buffer *ticket_blob;

	unsigned long renew_after, expires;
};

#define CEPHX_AU_ENC_BUF_LEN	128  /* big enough for encrypted blob */

struct ceph_x_authorizer {
	struct ceph_authorizer base;
	struct ceph_crypto_key session_key;
	struct ceph_buffer *buf;
	unsigned int service;
	u64 nonce;
	u64 secret_id;
	char enc_buf[CEPHX_AU_ENC_BUF_LEN] __aligned(8);
};

struct ceph_x_info {
	struct ceph_crypto_key secret;

	bool starting;
	u64 server_challenge;

	unsigned int have_keys;
	struct rb_root ticket_handlers;

	struct ceph_x_authorizer auth_authorizer;
};

int ceph_x_init(struct ceph_auth_client *ac);

#endif

parentbf29bddf0417a4783da3b24e8c9e017ac649326f (diff)
efi/fdt: Avoid FDT manipulation after ExitBootServices()
Some AArch64 UEFI implementations disable the MMU in ExitBootServices(), after which unaligned accesses to RAM are no longer supported. Commit: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") fixed an issue in the memory map handling of the stub FDT code, but inadvertently created an issue with such firmware, by moving some of the FDT manipulation to after the invocation of ExitBootServices(). Given that the stub's libfdt implementation uses the ordinary, accelerated string functions, which rely on hardware handling of unaligned accesses, manipulating the FDT with the MMU off may result in alignment faults. So fix the situation by moving the update_fdt_memmap() call into the callback function invoked by efi_exit_boot_services() right before it calls the ExitBootServices() UEFI service (which is arguably a better place for it anyway) Note that disabling the MMU in ExitBootServices() is not compliant with the UEFI spec, and carries great risk due to the fact that switching from cached to uncached memory accesses halfway through compiler generated code (i.e., involving a stack) can never be done in a way that is architecturally safe. Fixes: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Riku Voipio <riku.voipio@linaro.org> Cc: <stable@vger.kernel.org> Cc: mark.rutland@arm.com Cc: linux-efi@vger.kernel.org Cc: matt@codeblueprint.co.uk Cc: leif.lindholm@linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'sound/firewire/digi00x/digi00x-pcm.c')