forked from mirrors/linux
77b9040195
Now that both native and compat ioctl syscalls are in the same file, a couple of simplifications can be made, bringing the implementation closer together: - do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate() can become static, allowing the compiler to optimize better - slightly update the coding style for consistency between the functions. - rather than listing each command in two switch statements for the compat case, just call a single function that has all the common commands. As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32. This is harmless for i386 emulation, and can be considered a bugfix for x32 emulation, which never supported these in the past. Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _FALLOC_H_
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#define _FALLOC_H_
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#include <uapi/linux/falloc.h>
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/*
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* Space reservation ioctls and argument structure
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* are designed to be compatible with the legacy XFS ioctls.
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*/
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struct space_resv {
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__s16 l_type;
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__s16 l_whence;
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__s64 l_start;
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__s64 l_len; /* len == 0 means until end of file */
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__s32 l_sysid;
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__u32 l_pid;
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__s32 l_pad[4]; /* reserved area */
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};
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#define FS_IOC_RESVSP _IOW('X', 40, struct space_resv)
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#define FS_IOC_UNRESVSP _IOW('X', 41, struct space_resv)
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#define FS_IOC_RESVSP64 _IOW('X', 42, struct space_resv)
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#define FS_IOC_UNRESVSP64 _IOW('X', 43, struct space_resv)
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#define FS_IOC_ZERO_RANGE _IOW('X', 57, struct space_resv)
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#define FALLOC_FL_SUPPORTED_MASK (FALLOC_FL_KEEP_SIZE | \
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FALLOC_FL_PUNCH_HOLE | \
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FALLOC_FL_COLLAPSE_RANGE | \
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FALLOC_FL_ZERO_RANGE | \
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FALLOC_FL_INSERT_RANGE | \
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FALLOC_FL_UNSHARE_RANGE)
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/* on ia32 l_start is on a 32-bit boundary */
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#if defined(CONFIG_X86_64)
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struct space_resv_32 {
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__s16 l_type;
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__s16 l_whence;
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__s64 l_start __attribute__((packed));
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/* len == 0 means until end of file */
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__s64 l_len __attribute__((packed));
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__s32 l_sysid;
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__u32 l_pid;
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__s32 l_pad[4]; /* reserve area */
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};
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#define FS_IOC_RESVSP_32 _IOW ('X', 40, struct space_resv_32)
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#define FS_IOC_UNRESVSP_32 _IOW ('X', 41, struct space_resv_32)
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#define FS_IOC_RESVSP64_32 _IOW ('X', 42, struct space_resv_32)
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#define FS_IOC_UNRESVSP64_32 _IOW ('X', 43, struct space_resv_32)
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#define FS_IOC_ZERO_RANGE_32 _IOW ('X', 57, struct space_resv_32)
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#endif
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#endif /* _FALLOC_H_ */
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