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| author | Andi Kleen <ak@suse.de> | 2006-05-01 12:15:48 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-05-01 18:17:43 -0700 |
| commit | d2610202290b4924b71747314a0f88f28807702e (patch) | |
| tree | bdfde16e24caa597f66504d555b06ee2e480ef54 | |
| parent | 5e7dd2ab6b9bdfa60e19b8739e6b2a204fd4f477 (diff) | |
| download | lwn-d2610202290b4924b71747314a0f88f28807702e.tar.gz lwn-d2610202290b4924b71747314a0f88f28807702e.zip | |
[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>
| -rw-r--r-- | arch/x86_64/ia32/ia32entry.S | 1 | ||||
| -rw-r--r-- | fs/compat.c | 20 |
2 files changed, 21 insertions, 0 deletions
diff --git a/arch/x86_64/ia32/ia32entry.S b/arch/x86_64/ia32/ia32entry.S index 57fc37e0fb9c..5a92fed2d1d5 100644 --- a/arch/x86_64/ia32/ia32entry.S +++ b/arch/x86_64/ia32/ia32entry.S @@ -695,4 +695,5 @@ ia32_sys_call_table: .quad sys_splice .quad sys_sync_file_range .quad sys_tee + .quad compat_sys_vmsplice ia32_syscall_end: diff --git a/fs/compat.c b/fs/compat.c index 2e32bd340474..3f3e8f4d43d6 100644 --- a/fs/compat.c +++ b/fs/compat.c @@ -1317,6 +1317,26 @@ out: return ret; } +asmlinkage long +compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32, + unsigned int nr_segs, unsigned int flags) +{ + unsigned i; + struct iovec *iov; + if (nr_segs >= UIO_MAXIOV) + return -EINVAL; + iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec)); + for (i = 0; i < nr_segs; i++) { + struct compat_iovec v; + if (get_user(v.iov_base, &iov32[i].iov_base) || + get_user(v.iov_len, &iov32[i].iov_len) || + put_user(compat_ptr(v.iov_base), &iov[i].iov_base) || + put_user(v.iov_len, &iov[i].iov_len)) + return -EFAULT; + } + return sys_vmsplice(fd, iov, nr_segs, flags); +} + /* * Exactly like fs/open.c:sys_open(), except that it doesn't set the * O_LARGEFILE flag. |