mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-27 06:04:23 +08:00
[NET]: SPARC checksum annotations and cleanups.
* sanitize prototypes, annotate * kill bogus access_ok() in csum_partial_copy_from_user (the only caller checks) * kill useless shift Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Al Viro
David S. Miller
parent
7c73a746ba
commit
16ec7e168d
@ -30,7 +30,7 @@
|
||||
*
|
||||
* it's best to have buff aligned on a 32-bit boundary
|
||||
*/
|
||||
extern unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum);
|
||||
extern __wsum csum_partial(const void *buff, int len, __wsum sum);
|
||||
|
||||
/* the same as csum_partial, but copies from fs:src while it
|
||||
* checksums
|
||||
@ -41,9 +41,8 @@ extern unsigned int csum_partial(const unsigned char * buff, int len, unsigned i
|
||||
|
||||
extern unsigned int __csum_partial_copy_sparc_generic (const unsigned char *, unsigned char *);
|
||||
|
||||
static inline unsigned int
|
||||
csum_partial_copy_nocheck (const unsigned char *src, unsigned char *dst, int len,
|
||||
unsigned int sum)
|
||||
static inline __wsum
|
||||
csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum)
|
||||
{
|
||||
register unsigned int ret asm("o0") = (unsigned int)src;
|
||||
register char *d asm("o1") = dst;
|
||||
@ -57,42 +56,36 @@ csum_partial_copy_nocheck (const unsigned char *src, unsigned char *dst, int len
|
||||
: "o2", "o3", "o4", "o5", "o7",
|
||||
"g2", "g3", "g4", "g5", "g7",
|
||||
"memory", "cc");
|
||||
return ret;
|
||||
return (__force __wsum)ret;
|
||||
}
|
||||
|
||||
static inline unsigned int
|
||||
csum_partial_copy_from_user(const unsigned char __user *src, unsigned char *dst, int len,
|
||||
unsigned int sum, int *err)
|
||||
static inline __wsum
|
||||
csum_partial_copy_from_user(const void __user *src, void *dst, int len,
|
||||
__wsum sum, int *err)
|
||||
{
|
||||
if (!access_ok (VERIFY_READ, src, len)) {
|
||||
*err = -EFAULT;
|
||||
memset (dst, 0, len);
|
||||
return sum;
|
||||
} else {
|
||||
register unsigned long ret asm("o0") = (unsigned long)src;
|
||||
register char *d asm("o1") = dst;
|
||||
register int l asm("g1") = len;
|
||||
register unsigned int s asm("g7") = sum;
|
||||
register unsigned long ret asm("o0") = (unsigned long)src;
|
||||
register char *d asm("o1") = dst;
|
||||
register int l asm("g1") = len;
|
||||
register __wsum s asm("g7") = sum;
|
||||
|
||||
__asm__ __volatile__ (
|
||||
".section __ex_table,#alloc\n\t"
|
||||
".align 4\n\t"
|
||||
".word 1f,2\n\t"
|
||||
".previous\n"
|
||||
"1:\n\t"
|
||||
"call __csum_partial_copy_sparc_generic\n\t"
|
||||
" st %8, [%%sp + 64]\n"
|
||||
: "=&r" (ret), "=&r" (d), "=&r" (l), "=&r" (s)
|
||||
: "0" (ret), "1" (d), "2" (l), "3" (s), "r" (err)
|
||||
: "o2", "o3", "o4", "o5", "o7", "g2", "g3", "g4", "g5",
|
||||
"cc", "memory");
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
__asm__ __volatile__ (
|
||||
".section __ex_table,#alloc\n\t"
|
||||
".align 4\n\t"
|
||||
".word 1f,2\n\t"
|
||||
".previous\n"
|
||||
"1:\n\t"
|
||||
"call __csum_partial_copy_sparc_generic\n\t"
|
||||
" st %8, [%%sp + 64]\n"
|
||||
: "=&r" (ret), "=&r" (d), "=&r" (l), "=&r" (s)
|
||||
: "0" (ret), "1" (d), "2" (l), "3" (s), "r" (err)
|
||||
: "o2", "o3", "o4", "o5", "o7", "g2", "g3", "g4", "g5",
|
||||
"cc", "memory");
|
||||
return (__force __wsum)ret;
|
||||
}
|
||||
|
||||
static inline unsigned int
|
||||
csum_partial_copy_to_user(const unsigned char *src, unsigned char __user *dst, int len,
|
||||
unsigned int sum, int *err)
|
||||
static inline __wsum
|
||||
csum_partial_copy_to_user(const void *src, void __user *dst, int len,
|
||||
__wsum sum, int *err)
|
||||
{
|
||||
if (!access_ok (VERIFY_WRITE, dst, len)) {
|
||||
*err = -EFAULT;
|
||||
@ -101,7 +94,7 @@ csum_partial_copy_to_user(const unsigned char *src, unsigned char __user *dst, i
|
||||
register unsigned long ret asm("o0") = (unsigned long)src;
|
||||
register char __user *d asm("o1") = dst;
|
||||
register int l asm("g1") = len;
|
||||
register unsigned int s asm("g7") = sum;
|
||||
register __wsum s asm("g7") = sum;
|
||||
|
||||
__asm__ __volatile__ (
|
||||
".section __ex_table,#alloc\n\t"
|
||||
@ -116,7 +109,7 @@ csum_partial_copy_to_user(const unsigned char *src, unsigned char __user *dst, i
|
||||
: "o2", "o3", "o4", "o5", "o7",
|
||||
"g2", "g3", "g4", "g5",
|
||||
"cc", "memory");
|
||||
return ret;
|
||||
return (__force __wsum)ret;
|
||||
}
|
||||
}
|
||||
|
||||
@ -126,10 +119,9 @@ csum_partial_copy_to_user(const unsigned char *src, unsigned char __user *dst, i
|
||||
/* ihl is always 5 or greater, almost always is 5, and iph is word aligned
|
||||
* the majority of the time.
|
||||
*/
|
||||
static inline unsigned short ip_fast_csum(const unsigned char *iph,
|
||||
unsigned int ihl)
|
||||
static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
|
||||
{
|
||||
unsigned short sum;
|
||||
__sum16 sum;
|
||||
|
||||
/* Note: We must read %2 before we touch %0 for the first time,
|
||||
* because GCC can legitimately use the same register for
|
||||
@ -164,7 +156,7 @@ static inline unsigned short ip_fast_csum(const unsigned char *iph,
|
||||
}
|
||||
|
||||
/* Fold a partial checksum without adding pseudo headers. */
|
||||
static inline unsigned int csum_fold(unsigned int sum)
|
||||
static inline __sum16 csum_fold(__wsum sum)
|
||||
{
|
||||
unsigned int tmp;
|
||||
|
||||
@ -173,23 +165,22 @@ static inline unsigned int csum_fold(unsigned int sum)
|
||||
"addx\t%1, %%g0, %1\n\t"
|
||||
"xnor\t%%g0, %1, %0"
|
||||
: "=&r" (sum), "=r" (tmp)
|
||||
: "0" (sum), "1" (sum<<16)
|
||||
: "0" (sum), "1" ((__force u32)sum<<16)
|
||||
: "cc");
|
||||
return sum;
|
||||
return (__force __sum16)sum;
|
||||
}
|
||||
|
||||
static inline unsigned long csum_tcpudp_nofold(unsigned long saddr,
|
||||
unsigned long daddr,
|
||||
unsigned int len,
|
||||
static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
|
||||
unsigned short len,
|
||||
unsigned short proto,
|
||||
unsigned int sum)
|
||||
__wsum sum)
|
||||
{
|
||||
__asm__ __volatile__("addcc\t%1, %0, %0\n\t"
|
||||
"addxcc\t%2, %0, %0\n\t"
|
||||
"addxcc\t%3, %0, %0\n\t"
|
||||
"addx\t%0, %%g0, %0\n\t"
|
||||
: "=r" (sum), "=r" (saddr)
|
||||
: "r" (daddr), "r" ((proto<<16)+len), "0" (sum),
|
||||
: "r" (daddr), "r" (proto + len), "0" (sum),
|
||||
"1" (saddr)
|
||||
: "cc");
|
||||
return sum;
|
||||
@ -199,22 +190,20 @@ static inline unsigned long csum_tcpudp_nofold(unsigned long saddr,
|
||||
* computes the checksum of the TCP/UDP pseudo-header
|
||||
* returns a 16-bit checksum, already complemented
|
||||
*/
|
||||
static inline unsigned short int csum_tcpudp_magic(unsigned long saddr,
|
||||
unsigned long daddr,
|
||||
static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
|
||||
unsigned short len,
|
||||
unsigned short proto,
|
||||
unsigned int sum)
|
||||
__wsum sum)
|
||||
{
|
||||
return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
|
||||
}
|
||||
|
||||
#define _HAVE_ARCH_IPV6_CSUM
|
||||
|
||||
static inline unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
|
||||
struct in6_addr *daddr,
|
||||
__u32 len,
|
||||
unsigned short proto,
|
||||
unsigned int sum)
|
||||
static inline __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
|
||||
const struct in6_addr *daddr,
|
||||
__u32 len, unsigned short proto,
|
||||
__wsum sum)
|
||||
{
|
||||
__asm__ __volatile__ (
|
||||
"addcc %3, %4, %%g4\n\t"
|
||||
@ -245,7 +234,7 @@ static inline unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
|
||||
}
|
||||
|
||||
/* this routine is used for miscellaneous IP-like checksums, mainly in icmp.c */
|
||||
static inline unsigned short ip_compute_csum(unsigned char * buff, int len)
|
||||
static inline __sum16 ip_compute_csum(const void *buff, int len)
|
||||
{
|
||||
return csum_fold(csum_partial(buff, len, 0));
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user