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306f7cc1e9
The F_GETLK64/F_SETLK64/F_SETLKW64 fcntl opcodes are only implemented for the 32-bit syscall APIs, but are also needed for compat handling on 64-bit kernels. Consolidate them in unistd.h instead of definining the internal compat definitions in compat.h, which is rather error prone (e.g. parisc gets the values wrong currently). Note that before this change they were never visible to userspace due to the fact that CONFIG_64BIT is only set for kernel builds. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Guo Ren <guoren@kernel.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Tested-by: Heiko Stuebner <heiko@sntech.de> Link: https://lore.kernel.org/r/20220405071314.3225832-3-guoren@kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
187 lines
4.0 KiB
C
187 lines
4.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_COMPAT_H
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#define _ASM_X86_COMPAT_H
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/*
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* Architecture specific compatibility types
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*/
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/sched/task_stack.h>
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#include <asm/processor.h>
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#include <asm/user32.h>
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#include <asm/unistd.h>
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#define compat_mode_t compat_mode_t
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typedef u16 compat_mode_t;
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#include <asm-generic/compat.h>
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#define COMPAT_USER_HZ 100
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#define COMPAT_UTS_MACHINE "i686\0\0"
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typedef u16 __compat_uid_t;
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typedef u16 __compat_gid_t;
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typedef u16 compat_dev_t;
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typedef u16 compat_nlink_t;
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typedef u16 compat_ipc_pid_t;
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typedef __kernel_fsid_t compat_fsid_t;
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struct compat_stat {
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compat_dev_t st_dev;
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u16 __pad1;
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compat_ino_t st_ino;
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compat_mode_t st_mode;
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compat_nlink_t st_nlink;
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__compat_uid_t st_uid;
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__compat_gid_t st_gid;
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compat_dev_t st_rdev;
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u16 __pad2;
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u32 st_size;
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u32 st_blksize;
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u32 st_blocks;
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u32 st_atime;
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u32 st_atime_nsec;
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u32 st_mtime;
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u32 st_mtime_nsec;
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u32 st_ctime;
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u32 st_ctime_nsec;
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u32 __unused4;
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u32 __unused5;
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};
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struct compat_flock {
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short l_type;
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short l_whence;
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compat_off_t l_start;
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compat_off_t l_len;
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compat_pid_t l_pid;
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};
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/*
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* IA32 uses 4 byte alignment for 64 bit quantities,
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* so we need to pack this structure.
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*/
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struct compat_flock64 {
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short l_type;
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short l_whence;
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compat_loff_t l_start;
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compat_loff_t l_len;
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compat_pid_t l_pid;
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} __attribute__((packed));
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struct compat_statfs {
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int f_type;
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int f_bsize;
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int f_blocks;
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int f_bfree;
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int f_bavail;
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int f_files;
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int f_ffree;
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compat_fsid_t f_fsid;
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int f_namelen; /* SunOS ignores this field. */
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int f_frsize;
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int f_flags;
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int f_spare[4];
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};
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#define COMPAT_RLIM_INFINITY 0xffffffff
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#define COMPAT_OFF_T_MAX 0x7fffffff
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struct compat_ipc64_perm {
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compat_key_t key;
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__compat_uid32_t uid;
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__compat_gid32_t gid;
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__compat_uid32_t cuid;
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__compat_gid32_t cgid;
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unsigned short mode;
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unsigned short __pad1;
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unsigned short seq;
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unsigned short __pad2;
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compat_ulong_t unused1;
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compat_ulong_t unused2;
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};
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struct compat_semid64_ds {
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struct compat_ipc64_perm sem_perm;
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compat_ulong_t sem_otime;
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compat_ulong_t sem_otime_high;
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compat_ulong_t sem_ctime;
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compat_ulong_t sem_ctime_high;
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compat_ulong_t sem_nsems;
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compat_ulong_t __unused3;
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compat_ulong_t __unused4;
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};
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struct compat_msqid64_ds {
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struct compat_ipc64_perm msg_perm;
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compat_ulong_t msg_stime;
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compat_ulong_t msg_stime_high;
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compat_ulong_t msg_rtime;
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compat_ulong_t msg_rtime_high;
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compat_ulong_t msg_ctime;
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compat_ulong_t msg_ctime_high;
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compat_ulong_t msg_cbytes;
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compat_ulong_t msg_qnum;
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compat_ulong_t msg_qbytes;
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compat_pid_t msg_lspid;
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compat_pid_t msg_lrpid;
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compat_ulong_t __unused4;
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compat_ulong_t __unused5;
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};
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struct compat_shmid64_ds {
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struct compat_ipc64_perm shm_perm;
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compat_size_t shm_segsz;
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compat_ulong_t shm_atime;
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compat_ulong_t shm_atime_high;
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compat_ulong_t shm_dtime;
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compat_ulong_t shm_dtime_high;
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compat_ulong_t shm_ctime;
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compat_ulong_t shm_ctime_high;
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compat_pid_t shm_cpid;
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compat_pid_t shm_lpid;
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compat_ulong_t shm_nattch;
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compat_ulong_t __unused4;
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compat_ulong_t __unused5;
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};
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#ifdef CONFIG_X86_X32_ABI
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#define COMPAT_USE_64BIT_TIME \
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(!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
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#endif
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static inline bool in_x32_syscall(void)
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{
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#ifdef CONFIG_X86_X32_ABI
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if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
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return true;
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#endif
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return false;
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}
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static inline bool in_32bit_syscall(void)
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{
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return in_ia32_syscall() || in_x32_syscall();
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}
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#ifdef CONFIG_COMPAT
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static inline bool in_compat_syscall(void)
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{
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return in_32bit_syscall();
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}
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#define in_compat_syscall in_compat_syscall /* override the generic impl */
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#define compat_need_64bit_alignment_fixup in_ia32_syscall
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#endif
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struct compat_siginfo;
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#ifdef CONFIG_X86_X32_ABI
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int copy_siginfo_to_user32(struct compat_siginfo __user *to,
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const kernel_siginfo_t *from);
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#define copy_siginfo_to_user32 copy_siginfo_to_user32
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#endif /* CONFIG_X86_X32_ABI */
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#endif /* _ASM_X86_COMPAT_H */
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