/*
* Copyright (c) 2000-2001 Christoph Hellwig.
* Copyright (c) 2016 Krzysztof Blaszkowski
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL").
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#ifndef _VXFS_INODE_H_
#define _VXFS_INODE_H_
/*
* Veritas filesystem driver - inode structure.
*
* This file contains the definition of the disk and core
* inodes of the Veritas Filesystem.
*/
#define VXFS_ISIZE 0x100 /* Inode size */
#define VXFS_NDADDR 10 /* Number of direct addrs in inode */
#define VXFS_NIADDR 2 /* Number of indirect addrs in inode */
#define VXFS_NIMMED 96 /* Size of immediate data in inode */
#define VXFS_NTYPED 6 /* Num of typed extents */
#define VXFS_TYPED_OFFSETMASK (0x00FFFFFFFFFFFFFFULL)
#define VXFS_TYPED_TYPEMASK (0xFF00000000000000ULL)
#define VXFS_TYPED_TYPESHIFT 56
#define VXFS_TYPED_PER_BLOCK(sbp) \
((sbp)->s_blocksize / sizeof(struct vxfs_typed))
/*
* Possible extent descriptor types for %VXFS_ORG_TYPED extents.
*/
enum {
VXFS_TYPED_INDIRECT = 1,
VXFS_TYPED_DATA = 2,
VXFS_TYPED_INDIRECT_DEV4 = 3,
VXFS_TYPED_DATA_DEV4 = 4,
};
/*
* Data stored immediately in the inode.
*/
struct vxfs_immed {
__u8 vi_immed[VXFS_NIMMED];
};
struct vxfs_ext4 {
__fs32 ve4_spare; /* ?? */
__fs32 ve4_indsize; /* Indirect extent size */
__fs32 ve4_indir[VXFS_NIADDR]; /* Indirect extents */
struct direct { /* Direct extents */
__fs32 extent; /* Extent number */
__fs32 size; /* Size of extent */
} ve4_direct[VXFS_NDADDR];
};
struct vxfs_typed {
__fs64 vt_hdr; /* Header, 0xTTOOOOOOOOOOOOOO; T=type,O=offs */
__fs32 vt_block; /* Extent block */
__fs32 vt_size; /* Size in blocks */
};
struct vxfs_typed_dev4 {
__fs64 vd4_hdr; /* Header, 0xTTOOOOOOOOOOOOOO; T=type,O=offs */
__fs64 vd4_block; /* Extent block */
__fs64 vd4_size; /* Size in blocks */
__fs32 vd4_dev; /* Device ID */
__u8 __pad1;
};
/*
* The inode as contained on the physical device.
*/
struct vxfs_dinode {
__fs32 vdi_mode;
__fs32 vdi_nlink; /* Link count */
__fs32 vdi_uid; /* UID */
__fs32 vdi_gid; /* GID */
__fs64 vdi_size; /* Inode size in bytes */
__fs32 vdi_atime; /* Last time accessed - sec */
__fs32 vdi_autime; /* Last time accessed - usec */
__fs32 vdi_mtime; /* Last modify time - sec */
__fs32 vdi_mutime; /* Last modify time - usec */
__fs32 vdi_ctime; /* Create time - sec */
__fs32 vdi_cutime; /* Create time - usec */
__u8 vdi_aflags; /* Allocation flags */
__u8 vdi_orgtype; /* Organisation type */
__fs16 vdi_eopflags;
__fs32 vdi_eopdata;
union {
__fs32 rdev;
__fs32 dotdot;
struct {
__u32 reserved;
__fs32 fixextsize;
} i_regular;
struct {
__fs32 matchino;
__fs32 fsetindex;
} i_vxspec;
__u64 align;
} vdi_ftarea;
__fs32 vdi_blocks; /* How much blocks does inode occupy */
__fs32 vdi_gen; /* Inode generation */
__fs64 vdi_version; /* Version */
union {
struct vxfs_immed immed;
struct vxfs_ext4 ext4;
struct vxfs_typed typed[VXFS_NTYPED];
} vdi_org;
__fs32 vdi_iattrino;
};
#define vdi_rdev vdi_ftarea.rdev
#define vdi_dotdot vdi_ftarea.dotdot
#define vdi_fixextsize vdi_ftarea.regular.fixextsize
#define vdi_matchino vdi_ftarea.vxspec.matchino
#define vdi_fsetindex vdi_ftarea.vxspec.fsetindex
#define vdi_immed vdi_org.immed
#define vdi_ext4 vdi_org.ext4
#define vdi_typed vdi_org.typed
/*
* The inode as represented in the main memory.
*/
struct vxfs_inode_info {
struct inode vfs_inode;
__u32 vii_mode;
__u32 vii_nlink; /* Link count */
__u32 vii_uid; /* UID */
__u32 vii_gid; /* GID */
__u64 vii_size; /* Inode size in bytes */
__u32 vii_atime; /* Last time accessed - sec */
__u32 vii_autime; /* Last time accessed - usec */
__u32 vii_mtime; /* Last modify time - sec */
__u32 vii_mutime; /* Last modify time - usec */
__u32 vii_ctime; /* Create time - sec */
__u32 vii_cutime; /* Create time - usec */
__u8 vii_orgtype; /* Organisation type */
union {
__u32 rdev;
__u32 dotdot;
} vii_ftarea;
__u32 vii_blocks; /* How much blocks does inode occupy */
__u32 vii_gen; /* Inode generation */
union {
struct vxfs_immed immed;
struct vxfs_ext4 ext4;
struct vxfs_typed typed[VXFS_NTYPED];
} vii_org;
};
#define vii_rdev vii_ftarea.rdev
#define vii_dotdot vii_ftarea.dotdot
#define vii_immed vii_org.immed
#define vii_ext4 vii_org.ext4
#define vii_typed vii_org.typed
static inline struct vxfs_inode_info *VXFS_INO(struct inode *inode)
{
return container_of(inode, struct vxfs_inode_info, vfs_inode);
}
#endif /* _VXFS_INODE_H_ */
/a> (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>