[PATCH] x86_64: Add compat_sys_vmsplice and use it in x86-64
Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -695,4 +695,5 @@ ia32_sys_call_table:
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.quad sys_splice
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.quad sys_sync_file_range
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.quad sys_tee
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.quad compat_sys_vmsplice
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ia32_syscall_end:
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20
fs/compat.c
20
fs/compat.c
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@ -1317,6 +1317,26 @@ out:
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return ret;
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}
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asmlinkage long
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compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
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unsigned int nr_segs, unsigned int flags)
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{
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unsigned i;
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struct iovec *iov;
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if (nr_segs >= UIO_MAXIOV)
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return -EINVAL;
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iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
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for (i = 0; i < nr_segs; i++) {
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struct compat_iovec v;
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if (get_user(v.iov_base, &iov32[i].iov_base) ||
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get_user(v.iov_len, &iov32[i].iov_len) ||
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put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
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put_user(v.iov_len, &iov[i].iov_len))
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return -EFAULT;
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}
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return sys_vmsplice(fd, iov, nr_segs, flags);
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}
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/*
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* Exactly like fs/open.c:sys_open(), except that it doesn't set the
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* O_LARGEFILE flag.
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