mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
Pull networking updates from David Miller:
"This is a re-do of the net-next pull request for the current merge
window. The only difference from the one I made the other day is that
this has Eliezer's interface renames and the timeout handling changes
made based upon your feedback, as well as a few bug fixes that have
trickeled in.
Highlights:
1) Low latency device polling, eliminating the cost of interrupt
handling and context switches. Allows direct polling of a network
device from socket operations, such as recvmsg() and poll().
Currently ixgbe, mlx4, and bnx2x support this feature.
Full high level description, performance numbers, and design in
commit 0a4db187a9
("Merge branch 'll_poll'")
From Eliezer Tamir.
2) With the routing cache removed, ip_check_mc_rcu() gets exercised
more than ever before in the case where we have lots of multicast
addresses. Use a hash table instead of a simple linked list, from
Eric Dumazet.
3) Add driver for Atheros CQA98xx 802.11ac wireless devices, from
Bartosz Markowski, Janusz Dziedzic, Kalle Valo, Marek Kwaczynski,
Marek Puzyniak, Michal Kazior, and Sujith Manoharan.
4) Support reporting the TUN device persist flag to userspace, from
Pavel Emelyanov.
5) Allow controlling network device VF link state using netlink, from
Rony Efraim.
6) Support GRE tunneling in openvswitch, from Pravin B Shelar.
7) Adjust SOCK_MIN_RCVBUF and SOCK_MIN_SNDBUF for modern times, from
Daniel Borkmann and Eric Dumazet.
8) Allow controlling of TCP quickack behavior on a per-route basis,
from Cong Wang.
9) Several bug fixes and improvements to vxlan from Stephen
Hemminger, Pravin B Shelar, and Mike Rapoport. In particular,
support receiving on multiple UDP ports.
10) Major cleanups, particular in the area of debugging and cookie
lifetime handline, to the SCTP protocol code. From Daniel
Borkmann.
11) Allow packets to cross network namespaces when traversing tunnel
devices. From Nicolas Dichtel.
12) Allow monitoring netlink traffic via AF_PACKET sockets, in a
manner akin to how we monitor real network traffic via ptype_all.
From Daniel Borkmann.
13) Several bug fixes and improvements for the new alx device driver,
from Johannes Berg.
14) Fix scalability issues in the netem packet scheduler's time queue,
by using an rbtree. From Eric Dumazet.
15) Several bug fixes in TCP loss recovery handling, from Yuchung
Cheng.
16) Add support for GSO segmentation of MPLS packets, from Simon
Horman.
17) Make network notifiers have a real data type for the opaque
pointer that's passed into them. Use this to properly handle
network device flag changes in arp_netdev_event(). From Jiri
Pirko and Timo Teräs.
18) Convert several drivers over to module_pci_driver(), from Peter
Huewe.
19) tcp_fixup_rcvbuf() can loop 500 times over loopback, just use a
O(1) calculation instead. From Eric Dumazet.
20) Support setting of explicit tunnel peer addresses in ipv6, just
like ipv4. From Nicolas Dichtel.
21) Protect x86 BPF JIT against spraying attacks, from Eric Dumazet.
22) Prevent a single high rate flow from overruning an individual cpu
during RX packet processing via selective flow shedding. From
Willem de Bruijn.
23) Don't use spinlocks in TCP md5 signing fast paths, from Eric
Dumazet.
24) Don't just drop GSO packets which are above the TBF scheduler's
burst limit, chop them up so they are in-bounds instead. Also
from Eric Dumazet.
25) VLAN offloads are missed when configured on top of a bridge, fix
from Vlad Yasevich.
26) Support IPV6 in ping sockets. From Lorenzo Colitti.
27) Receive flow steering targets should be updated at poll() time
too, from David Majnemer.
28) Fix several corner case regressions in PMTU/redirect handling due
to the routing cache removal, from Timo Teräs.
29) We have to be mindful of ipv4 mapped ipv6 sockets in
upd_v6_push_pending_frames(). From Hannes Frederic Sowa.
30) Fix L2TP sequence number handling bugs, from James Chapman."
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1214 commits)
drivers/net: caif: fix wrong rtnl_is_locked() usage
drivers/net: enic: release rtnl_lock on error-path
vhost-net: fix use-after-free in vhost_net_flush
net: mv643xx_eth: do not use port number as platform device id
net: sctp: confirm route during forward progress
virtio_net: fix race in RX VQ processing
virtio: support unlocked queue poll
net/cadence/macb: fix bug/typo in extracting gem_irq_read_clear bit
Documentation: Fix references to defunct linux-net@vger.kernel.org
net/fs: change busy poll time accounting
net: rename low latency sockets functions to busy poll
bridge: fix some kernel warning in multicast timer
sfc: Fix memory leak when discarding scattered packets
sit: fix tunnel update via netlink
dt:net:stmmac: Add dt specific phy reset callback support.
dt:net:stmmac: Add support to dwmac version 3.610 and 3.710
dt:net:stmmac: Allocate platform data only if its NULL.
net:stmmac: fix memleak in the open method
ipv6: rt6_check_neigh should successfully verify neigh if no NUD information are available
net: ipv6: fix wrong ping_v6_sendmsg return value
...
2395 lines
56 KiB
C
2395 lines
56 KiB
C
/*
|
|
* linux/lib/vsprintf.c
|
|
*
|
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
|
*/
|
|
|
|
/* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */
|
|
/*
|
|
* Wirzenius wrote this portably, Torvalds fucked it up :-)
|
|
*/
|
|
|
|
/*
|
|
* Fri Jul 13 2001 Crutcher Dunnavant <crutcher+kernel@datastacks.com>
|
|
* - changed to provide snprintf and vsnprintf functions
|
|
* So Feb 1 16:51:32 CET 2004 Juergen Quade <quade@hsnr.de>
|
|
* - scnprintf and vscnprintf
|
|
*/
|
|
|
|
#include <stdarg.h>
|
|
#include <linux/module.h> /* for KSYM_SYMBOL_LEN */
|
|
#include <linux/types.h>
|
|
#include <linux/string.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/kallsyms.h>
|
|
#include <linux/math64.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/ioport.h>
|
|
#include <net/addrconf.h>
|
|
|
|
#include <asm/page.h> /* for PAGE_SIZE */
|
|
#include <asm/sections.h> /* for dereference_function_descriptor() */
|
|
|
|
#include "kstrtox.h"
|
|
|
|
/**
|
|
* simple_strtoull - convert a string to an unsigned long long
|
|
* @cp: The start of the string
|
|
* @endp: A pointer to the end of the parsed string will be placed here
|
|
* @base: The number base to use
|
|
*
|
|
* This function is obsolete. Please use kstrtoull instead.
|
|
*/
|
|
unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base)
|
|
{
|
|
unsigned long long result;
|
|
unsigned int rv;
|
|
|
|
cp = _parse_integer_fixup_radix(cp, &base);
|
|
rv = _parse_integer(cp, base, &result);
|
|
/* FIXME */
|
|
cp += (rv & ~KSTRTOX_OVERFLOW);
|
|
|
|
if (endp)
|
|
*endp = (char *)cp;
|
|
|
|
return result;
|
|
}
|
|
EXPORT_SYMBOL(simple_strtoull);
|
|
|
|
/**
|
|
* simple_strtoul - convert a string to an unsigned long
|
|
* @cp: The start of the string
|
|
* @endp: A pointer to the end of the parsed string will be placed here
|
|
* @base: The number base to use
|
|
*
|
|
* This function is obsolete. Please use kstrtoul instead.
|
|
*/
|
|
unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base)
|
|
{
|
|
return simple_strtoull(cp, endp, base);
|
|
}
|
|
EXPORT_SYMBOL(simple_strtoul);
|
|
|
|
/**
|
|
* simple_strtol - convert a string to a signed long
|
|
* @cp: The start of the string
|
|
* @endp: A pointer to the end of the parsed string will be placed here
|
|
* @base: The number base to use
|
|
*
|
|
* This function is obsolete. Please use kstrtol instead.
|
|
*/
|
|
long simple_strtol(const char *cp, char **endp, unsigned int base)
|
|
{
|
|
if (*cp == '-')
|
|
return -simple_strtoul(cp + 1, endp, base);
|
|
|
|
return simple_strtoul(cp, endp, base);
|
|
}
|
|
EXPORT_SYMBOL(simple_strtol);
|
|
|
|
/**
|
|
* simple_strtoll - convert a string to a signed long long
|
|
* @cp: The start of the string
|
|
* @endp: A pointer to the end of the parsed string will be placed here
|
|
* @base: The number base to use
|
|
*
|
|
* This function is obsolete. Please use kstrtoll instead.
|
|
*/
|
|
long long simple_strtoll(const char *cp, char **endp, unsigned int base)
|
|
{
|
|
if (*cp == '-')
|
|
return -simple_strtoull(cp + 1, endp, base);
|
|
|
|
return simple_strtoull(cp, endp, base);
|
|
}
|
|
EXPORT_SYMBOL(simple_strtoll);
|
|
|
|
static noinline_for_stack
|
|
int skip_atoi(const char **s)
|
|
{
|
|
int i = 0;
|
|
|
|
while (isdigit(**s))
|
|
i = i*10 + *((*s)++) - '0';
|
|
|
|
return i;
|
|
}
|
|
|
|
/* Decimal conversion is by far the most typical, and is used
|
|
* for /proc and /sys data. This directly impacts e.g. top performance
|
|
* with many processes running. We optimize it for speed
|
|
* using ideas described at <http://www.cs.uiowa.edu/~jones/bcd/divide.html>
|
|
* (with permission from the author, Douglas W. Jones).
|
|
*/
|
|
|
|
#if BITS_PER_LONG != 32 || BITS_PER_LONG_LONG != 64
|
|
/* Formats correctly any integer in [0, 999999999] */
|
|
static noinline_for_stack
|
|
char *put_dec_full9(char *buf, unsigned q)
|
|
{
|
|
unsigned r;
|
|
|
|
/*
|
|
* Possible ways to approx. divide by 10
|
|
* (x * 0x1999999a) >> 32 x < 1073741829 (multiply must be 64-bit)
|
|
* (x * 0xcccd) >> 19 x < 81920 (x < 262149 when 64-bit mul)
|
|
* (x * 0x6667) >> 18 x < 43699
|
|
* (x * 0x3334) >> 17 x < 16389
|
|
* (x * 0x199a) >> 16 x < 16389
|
|
* (x * 0x0ccd) >> 15 x < 16389
|
|
* (x * 0x0667) >> 14 x < 2739
|
|
* (x * 0x0334) >> 13 x < 1029
|
|
* (x * 0x019a) >> 12 x < 1029
|
|
* (x * 0x00cd) >> 11 x < 1029 shorter code than * 0x67 (on i386)
|
|
* (x * 0x0067) >> 10 x < 179
|
|
* (x * 0x0034) >> 9 x < 69 same
|
|
* (x * 0x001a) >> 8 x < 69 same
|
|
* (x * 0x000d) >> 7 x < 69 same, shortest code (on i386)
|
|
* (x * 0x0007) >> 6 x < 19
|
|
* See <http://www.cs.uiowa.edu/~jones/bcd/divide.html>
|
|
*/
|
|
r = (q * (uint64_t)0x1999999a) >> 32;
|
|
*buf++ = (q - 10 * r) + '0'; /* 1 */
|
|
q = (r * (uint64_t)0x1999999a) >> 32;
|
|
*buf++ = (r - 10 * q) + '0'; /* 2 */
|
|
r = (q * (uint64_t)0x1999999a) >> 32;
|
|
*buf++ = (q - 10 * r) + '0'; /* 3 */
|
|
q = (r * (uint64_t)0x1999999a) >> 32;
|
|
*buf++ = (r - 10 * q) + '0'; /* 4 */
|
|
r = (q * (uint64_t)0x1999999a) >> 32;
|
|
*buf++ = (q - 10 * r) + '0'; /* 5 */
|
|
/* Now value is under 10000, can avoid 64-bit multiply */
|
|
q = (r * 0x199a) >> 16;
|
|
*buf++ = (r - 10 * q) + '0'; /* 6 */
|
|
r = (q * 0xcd) >> 11;
|
|
*buf++ = (q - 10 * r) + '0'; /* 7 */
|
|
q = (r * 0xcd) >> 11;
|
|
*buf++ = (r - 10 * q) + '0'; /* 8 */
|
|
*buf++ = q + '0'; /* 9 */
|
|
return buf;
|
|
}
|
|
#endif
|
|
|
|
/* Similar to above but do not pad with zeros.
|
|
* Code can be easily arranged to print 9 digits too, but our callers
|
|
* always call put_dec_full9() instead when the number has 9 decimal digits.
|
|
*/
|
|
static noinline_for_stack
|
|
char *put_dec_trunc8(char *buf, unsigned r)
|
|
{
|
|
unsigned q;
|
|
|
|
/* Copy of previous function's body with added early returns */
|
|
while (r >= 10000) {
|
|
q = r + '0';
|
|
r = (r * (uint64_t)0x1999999a) >> 32;
|
|
*buf++ = q - 10*r;
|
|
}
|
|
|
|
q = (r * 0x199a) >> 16; /* r <= 9999 */
|
|
*buf++ = (r - 10 * q) + '0';
|
|
if (q == 0)
|
|
return buf;
|
|
r = (q * 0xcd) >> 11; /* q <= 999 */
|
|
*buf++ = (q - 10 * r) + '0';
|
|
if (r == 0)
|
|
return buf;
|
|
q = (r * 0xcd) >> 11; /* r <= 99 */
|
|
*buf++ = (r - 10 * q) + '0';
|
|
if (q == 0)
|
|
return buf;
|
|
*buf++ = q + '0'; /* q <= 9 */
|
|
return buf;
|
|
}
|
|
|
|
/* There are two algorithms to print larger numbers.
|
|
* One is generic: divide by 1000000000 and repeatedly print
|
|
* groups of (up to) 9 digits. It's conceptually simple,
|
|
* but requires a (unsigned long long) / 1000000000 division.
|
|
*
|
|
* Second algorithm splits 64-bit unsigned long long into 16-bit chunks,
|
|
* manipulates them cleverly and generates groups of 4 decimal digits.
|
|
* It so happens that it does NOT require long long division.
|
|
*
|
|
* If long is > 32 bits, division of 64-bit values is relatively easy,
|
|
* and we will use the first algorithm.
|
|
* If long long is > 64 bits (strange architecture with VERY large long long),
|
|
* second algorithm can't be used, and we again use the first one.
|
|
*
|
|
* Else (if long is 32 bits and long long is 64 bits) we use second one.
|
|
*/
|
|
|
|
#if BITS_PER_LONG != 32 || BITS_PER_LONG_LONG != 64
|
|
|
|
/* First algorithm: generic */
|
|
|
|
static
|
|
char *put_dec(char *buf, unsigned long long n)
|
|
{
|
|
if (n >= 100*1000*1000) {
|
|
while (n >= 1000*1000*1000)
|
|
buf = put_dec_full9(buf, do_div(n, 1000*1000*1000));
|
|
if (n >= 100*1000*1000)
|
|
return put_dec_full9(buf, n);
|
|
}
|
|
return put_dec_trunc8(buf, n);
|
|
}
|
|
|
|
#else
|
|
|
|
/* Second algorithm: valid only for 64-bit long longs */
|
|
|
|
/* See comment in put_dec_full9 for choice of constants */
|
|
static noinline_for_stack
|
|
void put_dec_full4(char *buf, unsigned q)
|
|
{
|
|
unsigned r;
|
|
r = (q * 0xccd) >> 15;
|
|
buf[0] = (q - 10 * r) + '0';
|
|
q = (r * 0xcd) >> 11;
|
|
buf[1] = (r - 10 * q) + '0';
|
|
r = (q * 0xcd) >> 11;
|
|
buf[2] = (q - 10 * r) + '0';
|
|
buf[3] = r + '0';
|
|
}
|
|
|
|
/*
|
|
* Call put_dec_full4 on x % 10000, return x / 10000.
|
|
* The approximation x/10000 == (x * 0x346DC5D7) >> 43
|
|
* holds for all x < 1,128,869,999. The largest value this
|
|
* helper will ever be asked to convert is 1,125,520,955.
|
|
* (d1 in the put_dec code, assuming n is all-ones).
|
|
*/
|
|
static
|
|
unsigned put_dec_helper4(char *buf, unsigned x)
|
|
{
|
|
uint32_t q = (x * (uint64_t)0x346DC5D7) >> 43;
|
|
|
|
put_dec_full4(buf, x - q * 10000);
|
|
return q;
|
|
}
|
|
|
|
/* Based on code by Douglas W. Jones found at
|
|
* <http://www.cs.uiowa.edu/~jones/bcd/decimal.html#sixtyfour>
|
|
* (with permission from the author).
|
|
* Performs no 64-bit division and hence should be fast on 32-bit machines.
|
|
*/
|
|
static
|
|
char *put_dec(char *buf, unsigned long long n)
|
|
{
|
|
uint32_t d3, d2, d1, q, h;
|
|
|
|
if (n < 100*1000*1000)
|
|
return put_dec_trunc8(buf, n);
|
|
|
|
d1 = ((uint32_t)n >> 16); /* implicit "& 0xffff" */
|
|
h = (n >> 32);
|
|
d2 = (h ) & 0xffff;
|
|
d3 = (h >> 16); /* implicit "& 0xffff" */
|
|
|
|
q = 656 * d3 + 7296 * d2 + 5536 * d1 + ((uint32_t)n & 0xffff);
|
|
q = put_dec_helper4(buf, q);
|
|
|
|
q += 7671 * d3 + 9496 * d2 + 6 * d1;
|
|
q = put_dec_helper4(buf+4, q);
|
|
|
|
q += 4749 * d3 + 42 * d2;
|
|
q = put_dec_helper4(buf+8, q);
|
|
|
|
q += 281 * d3;
|
|
buf += 12;
|
|
if (q)
|
|
buf = put_dec_trunc8(buf, q);
|
|
else while (buf[-1] == '0')
|
|
--buf;
|
|
|
|
return buf;
|
|
}
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Convert passed number to decimal string.
|
|
* Returns the length of string. On buffer overflow, returns 0.
|
|
*
|
|
* If speed is not important, use snprintf(). It's easy to read the code.
|
|
*/
|
|
int num_to_str(char *buf, int size, unsigned long long num)
|
|
{
|
|
char tmp[sizeof(num) * 3];
|
|
int idx, len;
|
|
|
|
/* put_dec() may work incorrectly for num = 0 (generate "", not "0") */
|
|
if (num <= 9) {
|
|
tmp[0] = '0' + num;
|
|
len = 1;
|
|
} else {
|
|
len = put_dec(tmp, num) - tmp;
|
|
}
|
|
|
|
if (len > size)
|
|
return 0;
|
|
for (idx = 0; idx < len; ++idx)
|
|
buf[idx] = tmp[len - idx - 1];
|
|
return len;
|
|
}
|
|
|
|
#define ZEROPAD 1 /* pad with zero */
|
|
#define SIGN 2 /* unsigned/signed long */
|
|
#define PLUS 4 /* show plus */
|
|
#define SPACE 8 /* space if plus */
|
|
#define LEFT 16 /* left justified */
|
|
#define SMALL 32 /* use lowercase in hex (must be 32 == 0x20) */
|
|
#define SPECIAL 64 /* prefix hex with "0x", octal with "0" */
|
|
|
|
enum format_type {
|
|
FORMAT_TYPE_NONE, /* Just a string part */
|
|
FORMAT_TYPE_WIDTH,
|
|
FORMAT_TYPE_PRECISION,
|
|
FORMAT_TYPE_CHAR,
|
|
FORMAT_TYPE_STR,
|
|
FORMAT_TYPE_PTR,
|
|
FORMAT_TYPE_PERCENT_CHAR,
|
|
FORMAT_TYPE_INVALID,
|
|
FORMAT_TYPE_LONG_LONG,
|
|
FORMAT_TYPE_ULONG,
|
|
FORMAT_TYPE_LONG,
|
|
FORMAT_TYPE_UBYTE,
|
|
FORMAT_TYPE_BYTE,
|
|
FORMAT_TYPE_USHORT,
|
|
FORMAT_TYPE_SHORT,
|
|
FORMAT_TYPE_UINT,
|
|
FORMAT_TYPE_INT,
|
|
FORMAT_TYPE_NRCHARS,
|
|
FORMAT_TYPE_SIZE_T,
|
|
FORMAT_TYPE_PTRDIFF
|
|
};
|
|
|
|
struct printf_spec {
|
|
u8 type; /* format_type enum */
|
|
u8 flags; /* flags to number() */
|
|
u8 base; /* number base, 8, 10 or 16 only */
|
|
u8 qualifier; /* number qualifier, one of 'hHlLtzZ' */
|
|
s16 field_width; /* width of output field */
|
|
s16 precision; /* # of digits/chars */
|
|
};
|
|
|
|
static noinline_for_stack
|
|
char *number(char *buf, char *end, unsigned long long num,
|
|
struct printf_spec spec)
|
|
{
|
|
/* we are called with base 8, 10 or 16, only, thus don't need "G..." */
|
|
static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */
|
|
|
|
char tmp[66];
|
|
char sign;
|
|
char locase;
|
|
int need_pfx = ((spec.flags & SPECIAL) && spec.base != 10);
|
|
int i;
|
|
bool is_zero = num == 0LL;
|
|
|
|
/* locase = 0 or 0x20. ORing digits or letters with 'locase'
|
|
* produces same digits or (maybe lowercased) letters */
|
|
locase = (spec.flags & SMALL);
|
|
if (spec.flags & LEFT)
|
|
spec.flags &= ~ZEROPAD;
|
|
sign = 0;
|
|
if (spec.flags & SIGN) {
|
|
if ((signed long long)num < 0) {
|
|
sign = '-';
|
|
num = -(signed long long)num;
|
|
spec.field_width--;
|
|
} else if (spec.flags & PLUS) {
|
|
sign = '+';
|
|
spec.field_width--;
|
|
} else if (spec.flags & SPACE) {
|
|
sign = ' ';
|
|
spec.field_width--;
|
|
}
|
|
}
|
|
if (need_pfx) {
|
|
if (spec.base == 16)
|
|
spec.field_width -= 2;
|
|
else if (!is_zero)
|
|
spec.field_width--;
|
|
}
|
|
|
|
/* generate full string in tmp[], in reverse order */
|
|
i = 0;
|
|
if (num < spec.base)
|
|
tmp[i++] = digits[num] | locase;
|
|
/* Generic code, for any base:
|
|
else do {
|
|
tmp[i++] = (digits[do_div(num,base)] | locase);
|
|
} while (num != 0);
|
|
*/
|
|
else if (spec.base != 10) { /* 8 or 16 */
|
|
int mask = spec.base - 1;
|
|
int shift = 3;
|
|
|
|
if (spec.base == 16)
|
|
shift = 4;
|
|
do {
|
|
tmp[i++] = (digits[((unsigned char)num) & mask] | locase);
|
|
num >>= shift;
|
|
} while (num);
|
|
} else { /* base 10 */
|
|
i = put_dec(tmp, num) - tmp;
|
|
}
|
|
|
|
/* printing 100 using %2d gives "100", not "00" */
|
|
if (i > spec.precision)
|
|
spec.precision = i;
|
|
/* leading space padding */
|
|
spec.field_width -= spec.precision;
|
|
if (!(spec.flags & (ZEROPAD+LEFT))) {
|
|
while (--spec.field_width >= 0) {
|
|
if (buf < end)
|
|
*buf = ' ';
|
|
++buf;
|
|
}
|
|
}
|
|
/* sign */
|
|
if (sign) {
|
|
if (buf < end)
|
|
*buf = sign;
|
|
++buf;
|
|
}
|
|
/* "0x" / "0" prefix */
|
|
if (need_pfx) {
|
|
if (spec.base == 16 || !is_zero) {
|
|
if (buf < end)
|
|
*buf = '0';
|
|
++buf;
|
|
}
|
|
if (spec.base == 16) {
|
|
if (buf < end)
|
|
*buf = ('X' | locase);
|
|
++buf;
|
|
}
|
|
}
|
|
/* zero or space padding */
|
|
if (!(spec.flags & LEFT)) {
|
|
char c = (spec.flags & ZEROPAD) ? '0' : ' ';
|
|
while (--spec.field_width >= 0) {
|
|
if (buf < end)
|
|
*buf = c;
|
|
++buf;
|
|
}
|
|
}
|
|
/* hmm even more zero padding? */
|
|
while (i <= --spec.precision) {
|
|
if (buf < end)
|
|
*buf = '0';
|
|
++buf;
|
|
}
|
|
/* actual digits of result */
|
|
while (--i >= 0) {
|
|
if (buf < end)
|
|
*buf = tmp[i];
|
|
++buf;
|
|
}
|
|
/* trailing space padding */
|
|
while (--spec.field_width >= 0) {
|
|
if (buf < end)
|
|
*buf = ' ';
|
|
++buf;
|
|
}
|
|
|
|
return buf;
|
|
}
|
|
|
|
static noinline_for_stack
|
|
char *string(char *buf, char *end, const char *s, struct printf_spec spec)
|
|
{
|
|
int len, i;
|
|
|
|
if ((unsigned long)s < PAGE_SIZE)
|
|
s = "(null)";
|
|
|
|
len = strnlen(s, spec.precision);
|
|
|
|
if (!(spec.flags & LEFT)) {
|
|
while (len < spec.field_width--) {
|
|
if (buf < end)
|
|
*buf = ' ';
|
|
++buf;
|
|
}
|
|
}
|
|
for (i = 0; i < len; ++i) {
|
|
if (buf < end)
|
|
*buf = *s;
|
|
++buf; ++s;
|
|
}
|
|
while (len < spec.field_width--) {
|
|
if (buf < end)
|
|
*buf = ' ';
|
|
++buf;
|
|
}
|
|
|
|
return buf;
|
|
}
|
|
|
|
static noinline_for_stack
|
|
char *symbol_string(char *buf, char *end, void *ptr,
|
|
struct printf_spec spec, const char *fmt)
|
|
{
|
|
unsigned long value;
|
|
#ifdef CONFIG_KALLSYMS
|
|
char sym[KSYM_SYMBOL_LEN];
|
|
#endif
|
|
|
|
if (fmt[1] == 'R')
|
|
ptr = __builtin_extract_return_addr(ptr);
|
|
value = (unsigned long)ptr;
|
|
|
|
#ifdef CONFIG_KALLSYMS
|
|
if (*fmt == 'B')
|
|
sprint_backtrace(sym, value);
|
|
else if (*fmt != 'f' && *fmt != 's')
|
|
sprint_symbol(sym, value);
|
|
else
|
|
sprint_symbol_no_offset(sym, value);
|
|
|
|
return string(buf, end, sym, spec);
|
|
#else
|
|
spec.field_width = 2 * sizeof(void *);
|
|
spec.flags |= SPECIAL | SMALL | ZEROPAD;
|
|
spec.base = 16;
|
|
|
|
return number(buf, end, value, spec);
|
|
#endif
|
|
}
|
|
|
|
static noinline_for_stack
|
|
char *resource_string(char *buf, char *end, struct resource *res,
|
|
struct printf_spec spec, const char *fmt)
|
|
{
|
|
#ifndef IO_RSRC_PRINTK_SIZE
|
|
#define IO_RSRC_PRINTK_SIZE 6
|
|
#endif
|
|
|
|
#ifndef MEM_RSRC_PRINTK_SIZE
|
|
#define MEM_RSRC_PRINTK_SIZE 10
|
|
#endif
|
|
static const struct printf_spec io_spec = {
|
|
.base = 16,
|
|
.field_width = IO_RSRC_PRINTK_SIZE,
|
|
.precision = -1,
|
|
.flags = SPECIAL | SMALL | ZEROPAD,
|
|
};
|
|
static const struct printf_spec mem_spec = {
|
|
.base = 16,
|
|
.field_width = MEM_RSRC_PRINTK_SIZE,
|
|
.precision = -1,
|
|
.flags = SPECIAL | SMALL | ZEROPAD,
|
|
};
|
|
static const struct printf_spec bus_spec = {
|
|
.base = 16,
|
|
.field_width = 2,
|
|
.precision = -1,
|
|
.flags = SMALL | ZEROPAD,
|
|
};
|
|
static const struct printf_spec dec_spec = {
|
|
.base = 10,
|
|
.precision = -1,
|
|
.flags = 0,
|
|
};
|
|
static const struct printf_spec str_spec = {
|
|
.field_width = -1,
|
|
.precision = 10,
|
|
.flags = LEFT,
|
|
};
|
|
static const struct printf_spec flag_spec = {
|
|
.base = 16,
|
|
.precision = -1,
|
|
.flags = SPECIAL | SMALL,
|
|
};
|
|
|
|
/* 32-bit res (sizeof==4): 10 chars in dec, 10 in hex ("0x" + 8)
|
|
* 64-bit res (sizeof==8): 20 chars in dec, 18 in hex ("0x" + 16) */
|
|
#define RSRC_BUF_SIZE ((2 * sizeof(resource_size_t)) + 4)
|
|
#define FLAG_BUF_SIZE (2 * sizeof(res->flags))
|
|
#define DECODED_BUF_SIZE sizeof("[mem - 64bit pref window disabled]")
|
|
#define RAW_BUF_SIZE sizeof("[mem - flags 0x]")
|
|
char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE,
|
|
2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)];
|
|
|
|
char *p = sym, *pend = sym + sizeof(sym);
|
|
int decode = (fmt[0] == 'R') ? 1 : 0;
|
|
const struct printf_spec *specp;
|
|
|
|
*p++ = '[';
|
|
if (res->flags & IORESOURCE_IO) {
|
|
p = string(p, pend, "io ", str_spec);
|
|
specp = &io_spec;
|
|
} else if (res->flags & IORESOURCE_MEM) {
|
|
p = string(p, pend, "mem ", str_spec);
|
|
specp = &mem_spec;
|
|
} else if (res->flags & IORESOURCE_IRQ) {
|
|
p = string(p, pend, "irq ", str_spec);
|
|
specp = &dec_spec;
|
|
} else if (res->flags & IORESOURCE_DMA) {
|
|
p = string(p, pend, "dma ", str_spec);
|
|
specp = &dec_spec;
|
|
} else if (res->flags & IORESOURCE_BUS) {
|
|
p = string(p, pend, "bus ", str_spec);
|
|
specp = &bus_spec;
|
|
} else {
|
|
p = string(p, pend, "??? ", str_spec);
|
|
specp = &mem_spec;
|
|
decode = 0;
|
|
}
|
|
p = number(p, pend, res->start, *specp);
|
|
if (res->start != res->end) {
|
|
*p++ = '-';
|
|
p = number(p, pend, res->end, *specp);
|
|
}
|
|
if (decode) {
|
|
if (res->flags & IORESOURCE_MEM_64)
|
|
p = string(p, pend, " 64bit", str_spec);
|
|
if (res->flags & IORESOURCE_PREFETCH)
|
|
p = string(p, pend, " pref", str_spec);
|
|
if (res->flags & IORESOURCE_WINDOW)
|
|
p = string(p, pend, " window", str_spec);
|
|
if (res->flags & IORESOURCE_DISABLED)
|
|
p = string(p, pend, " disabled", str_spec);
|
|
} else {
|
|
p = string(p, pend, " flags ", str_spec);
|
|
p = number(p, pend, res->flags, flag_spec);
|
|
}
|
|
*p++ = ']';
|
|
*p = '\0';
|
|
|
|
return string(buf, end, sym, spec);
|
|
}
|
|
|
|
static noinline_for_stack
|
|
char *hex_string(char *buf, char *end, u8 *addr, struct printf_spec spec,
|
|
const char *fmt)
|
|
{
|
|
int i, len = 1; /* if we pass '%ph[CDN]', field width remains
|
|
negative value, fallback to the default */
|
|
char separator;
|
|
|
|
if (spec.field_width == 0)
|
|
/* nothing to print */
|
|
return buf;
|
|
|
|
if (ZERO_OR_NULL_PTR(addr))
|
|
/* NULL pointer */
|
|
return string(buf, end, NULL, spec);
|
|
|
|
switch (fmt[1]) {
|
|
case 'C':
|
|
separator = ':';
|
|
break;
|
|
case 'D':
|
|
separator = '-';
|
|
break;
|
|
case 'N':
|
|
separator = 0;
|
|
break;
|
|
default:
|
|
separator = ' ';
|
|
break;
|
|
}
|
|
|
|
if (spec.field_width > 0)
|
|
len = min_t(int, spec.field_width, 64);
|
|
|
|
for (i = 0; i < len && buf < end - 1; i++) {
|
|
buf = hex_byte_pack(buf, addr[i]);
|
|
|
|
if (buf < end && separator && i != len - 1)
|
|
*buf++ = separator;
|
|
}
|
|
|
|
return buf;
|
|
}
|
|
|
|
static noinline_for_stack
|
|
char *mac_address_string(char *buf, char *end, u8 *addr,
|
|
struct printf_spec spec, const char *fmt)
|
|
{
|
|
char mac_addr[sizeof("xx:xx:xx:xx:xx:xx")];
|
|
char *p = mac_addr;
|
|
int i;
|
|
char separator;
|
|
bool reversed = false;
|
|
|
|
switch (fmt[1]) {
|
|
case 'F':
|
|
separator = '-';
|
|
break;
|
|
|
|
case 'R':
|
|
reversed = true;
|
|
/* fall through */
|
|
|
|
default:
|
|
separator = ':';
|
|
break;
|
|
}
|
|
|
|
for (i = 0; i < 6; i++) {
|
|
if (reversed)
|
|
p = hex_byte_pack(p, addr[5 - i]);
|
|
else
|
|
p = hex_byte_pack(p, addr[i]);
|
|
|
|
if (fmt[0] == 'M' && i != 5)
|
|
*p++ = separator;
|
|
}
|
|
*p = '\0';
|
|
|
|
return string(buf, end, mac_addr, spec);
|
|
}
|
|
|
|
static noinline_for_stack
|
|
char *ip4_string(char *p, const u8 *addr, const char *fmt)
|
|
{
|
|
int i;
|
|
bool leading_zeros = (fmt[0] == 'i');
|
|
int index;
|
|
int step;
|
|
|
|
switch (fmt[2]) {
|
|
case 'h':
|
|
#ifdef __BIG_ENDIAN
|
|
index = 0;
|
|
step = 1;
|
|
#else
|
|
index = 3;
|
|
step = -1;
|
|
#endif
|
|
break;
|
|
case 'l':
|
|
index = 3;
|
|
step = -1;
|
|
break;
|
|
case 'n':
|
|
case 'b':
|
|
default:
|
|
index = 0;
|
|
step = 1;
|
|
break;
|
|
}
|
|
for (i = 0; i < 4; i++) {
|
|
char temp[3]; /* hold each IP quad in reverse order */
|
|
int digits = put_dec_trunc8(temp, addr[index]) - temp;
|
|
if (leading_zeros) {
|
|
if (digits < 3)
|
|
*p++ = '0';
|
|
if (digits < 2)
|
|
*p++ = '0';
|
|
}
|
|
/* reverse the digits in the quad */
|
|
while (digits--)
|
|
*p++ = temp[digits];
|
|
if (i < 3)
|
|
*p++ = '.';
|
|
index += step;
|
|
}
|
|
*p = '\0';
|
|
|
|
return p;
|
|
}
|
|
|
|
static noinline_for_stack
|
|
char *ip6_compressed_string(char *p, const char *addr)
|
|
{
|
|
int i, j, range;
|
|
unsigned char zerolength[8];
|
|
int longest = 1;
|
|
int colonpos = -1;
|
|
u16 word;
|
|
u8 hi, lo;
|
|
bool needcolon = false;
|
|
bool useIPv4;
|
|
struct in6_addr in6;
|
|
|
|
memcpy(&in6, addr, sizeof(struct in6_addr));
|
|
|
|
useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6);
|
|
|
|
memset(zerolength, 0, sizeof(zerolength));
|
|
|
|
if (useIPv4)
|
|
range = 6;
|
|
else
|
|
range = 8;
|
|
|
|
/* find position of longest 0 run */
|
|
for (i = 0; i < range; i++) {
|
|
for (j = i; j < range; j++) {
|
|
if (in6.s6_addr16[j] != 0)
|
|
break;
|
|
zerolength[i]++;
|
|
}
|
|
}
|
|
for (i = 0; i < range; i++) {
|
|
if (zerolength[i] > longest) {
|
|
longest = zerolength[i];
|
|
colonpos = i;
|
|
}
|
|
}
|
|
if (longest == 1) /* don't compress a single 0 */
|
|
colonpos = -1;
|
|
|
|
/* emit address */
|
|
for (i = 0; i < range; i++) {
|
|
if (i == colonpos) {
|
|
if (needcolon || i == 0)
|
|
*p++ = ':';
|
|
*p++ = ':';
|
|
needcolon = false;
|
|
i += longest - 1;
|
|
continue;
|
|
}
|
|
if (needcolon) {
|
|
*p++ = ':';
|
|
needcolon = false;
|
|
}
|
|
/* hex u16 without leading 0s */
|
|
word = ntohs(in6.s6_addr16[i]);
|
|
hi = word >> 8;
|
|
lo = word & 0xff;
|
|
if (hi) {
|
|
if (hi > 0x0f)
|
|
p = hex_byte_pack(p, hi);
|
|
else
|
|
*p++ = hex_asc_lo(hi);
|
|
p = hex_byte_pack(p, lo);
|
|
}
|
|
else if (lo > 0x0f)
|
|
p = hex_byte_pack(p, lo);
|
|
else
|
|
*p++ = hex_asc_lo(lo);
|
|
needcolon = true;
|
|
}
|
|
|
|
if (useIPv4) {
|
|
if (needcolon)
|
|
*p++ = ':';
|
|
p = ip4_string(p, &in6.s6_addr[12], "I4");
|
|
}
|
|
*p = '\0';
|
|
|
|
return p;
|
|
}
|
|
|
|
static noinline_for_stack
|
|
char *ip6_string(char *p, const char *addr, const char *fmt)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
p = hex_byte_pack(p, *addr++);
|
|
p = hex_byte_pack(p, *addr++);
|
|
if (fmt[0] == 'I' && i != 7)
|
|
*p++ = ':';
|
|
}
|
|
*p = '\0';
|
|
|
|
return p;
|
|
}
|
|
|
|
static noinline_for_stack
|
|
char *ip6_addr_string(char *buf, char *end, const u8 *addr,
|
|
struct printf_spec spec, const char *fmt)
|
|
{
|
|
char ip6_addr[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")];
|
|
|
|
if (fmt[0] == 'I' && fmt[2] == 'c')
|
|
ip6_compressed_string(ip6_addr, addr);
|
|
else
|
|
ip6_string(ip6_addr, addr, fmt);
|
|
|
|
return string(buf, end, ip6_addr, spec);
|
|
}
|
|
|
|
static noinline_for_stack
|
|
char *ip4_addr_string(char *buf, char *end, const u8 *addr,
|
|
struct printf_spec spec, const char *fmt)
|
|
{
|
|
char ip4_addr[sizeof("255.255.255.255")];
|
|
|
|
ip4_string(ip4_addr, addr, fmt);
|
|
|
|
return string(buf, end, ip4_addr, spec);
|
|
}
|
|
|
|
static noinline_for_stack
|
|
char *ip6_addr_string_sa(char *buf, char *end, const struct sockaddr_in6 *sa,
|
|
struct printf_spec spec, const char *fmt)
|
|
{
|
|
bool have_p = false, have_s = false, have_f = false, have_c = false;
|
|
char ip6_addr[sizeof("[xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255]") +
|
|
sizeof(":12345") + sizeof("/123456789") +
|
|
sizeof("%1234567890")];
|
|
char *p = ip6_addr, *pend = ip6_addr + sizeof(ip6_addr);
|
|
const u8 *addr = (const u8 *) &sa->sin6_addr;
|
|
char fmt6[2] = { fmt[0], '6' };
|
|
u8 off = 0;
|
|
|
|
fmt++;
|
|
while (isalpha(*++fmt)) {
|
|
switch (*fmt) {
|
|
case 'p':
|
|
have_p = true;
|
|
break;
|
|
case 'f':
|
|
have_f = true;
|
|
break;
|
|
case 's':
|
|
have_s = true;
|
|
break;
|
|
case 'c':
|
|
have_c = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (have_p || have_s || have_f) {
|
|
*p = '[';
|
|
off = 1;
|
|
}
|
|
|
|
if (fmt6[0] == 'I' && have_c)
|
|
p = ip6_compressed_string(ip6_addr + off, addr);
|
|
else
|
|
p = ip6_string(ip6_addr + off, addr, fmt6);
|
|
|
|
if (have_p || have_s || have_f)
|
|
*p++ = ']';
|
|
|
|
if (have_p) {
|
|
*p++ = ':';
|
|
p = number(p, pend, ntohs(sa->sin6_port), spec);
|
|
}
|
|
if (have_f) {
|
|
*p++ = '/';
|
|
p = number(p, pend, ntohl(sa->sin6_flowinfo &
|
|
IPV6_FLOWINFO_MASK), spec);
|
|
}
|
|
if (have_s) {
|
|
*p++ = '%';
|
|
p = number(p, pend, sa->sin6_scope_id, spec);
|
|
}
|
|
*p = '\0';
|
|
|
|
return string(buf, end, ip6_addr, spec);
|
|
}
|
|
|
|
static noinline_for_stack
|
|
char *ip4_addr_string_sa(char *buf, char *end, const struct sockaddr_in *sa,
|
|
struct printf_spec spec, const char *fmt)
|
|
{
|
|
bool have_p = false;
|
|
char *p, ip4_addr[sizeof("255.255.255.255") + sizeof(":12345")];
|
|
char *pend = ip4_addr + sizeof(ip4_addr);
|
|
const u8 *addr = (const u8 *) &sa->sin_addr.s_addr;
|
|
char fmt4[3] = { fmt[0], '4', 0 };
|
|
|
|
fmt++;
|
|
while (isalpha(*++fmt)) {
|
|
switch (*fmt) {
|
|
case 'p':
|
|
have_p = true;
|
|
break;
|
|
case 'h':
|
|
case 'l':
|
|
case 'n':
|
|
case 'b':
|
|
fmt4[2] = *fmt;
|
|
break;
|
|
}
|
|
}
|
|
|
|
p = ip4_string(ip4_addr, addr, fmt4);
|
|
if (have_p) {
|
|
*p++ = ':';
|
|
p = number(p, pend, ntohs(sa->sin_port), spec);
|
|
}
|
|
*p = '\0';
|
|
|
|
return string(buf, end, ip4_addr, spec);
|
|
}
|
|
|
|
static noinline_for_stack
|
|
char *uuid_string(char *buf, char *end, const u8 *addr,
|
|
struct printf_spec spec, const char *fmt)
|
|
{
|
|
char uuid[sizeof("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")];
|
|
char *p = uuid;
|
|
int i;
|
|
static const u8 be[16] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
|
|
static const u8 le[16] = {3,2,1,0,5,4,7,6,8,9,10,11,12,13,14,15};
|
|
const u8 *index = be;
|
|
bool uc = false;
|
|
|
|
switch (*(++fmt)) {
|
|
case 'L':
|
|
uc = true; /* fall-through */
|
|
case 'l':
|
|
index = le;
|
|
break;
|
|
case 'B':
|
|
uc = true;
|
|
break;
|
|
}
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
p = hex_byte_pack(p, addr[index[i]]);
|
|
switch (i) {
|
|
case 3:
|
|
case 5:
|
|
case 7:
|
|
case 9:
|
|
*p++ = '-';
|
|
break;
|
|
}
|
|
}
|
|
|
|
*p = 0;
|
|
|
|
if (uc) {
|
|
p = uuid;
|
|
do {
|
|
*p = toupper(*p);
|
|
} while (*(++p));
|
|
}
|
|
|
|
return string(buf, end, uuid, spec);
|
|
}
|
|
|
|
static
|
|
char *netdev_feature_string(char *buf, char *end, const u8 *addr,
|
|
struct printf_spec spec)
|
|
{
|
|
spec.flags |= SPECIAL | SMALL | ZEROPAD;
|
|
if (spec.field_width == -1)
|
|
spec.field_width = 2 + 2 * sizeof(netdev_features_t);
|
|
spec.base = 16;
|
|
|
|
return number(buf, end, *(const netdev_features_t *)addr, spec);
|
|
}
|
|
|
|
int kptr_restrict __read_mostly;
|
|
|
|
/*
|
|
* Show a '%p' thing. A kernel extension is that the '%p' is followed
|
|
* by an extra set of alphanumeric characters that are extended format
|
|
* specifiers.
|
|
*
|
|
* Right now we handle:
|
|
*
|
|
* - 'F' For symbolic function descriptor pointers with offset
|
|
* - 'f' For simple symbolic function names without offset
|
|
* - 'S' For symbolic direct pointers with offset
|
|
* - 's' For symbolic direct pointers without offset
|
|
* - '[FfSs]R' as above with __builtin_extract_return_addr() translation
|
|
* - 'B' For backtraced symbolic direct pointers with offset
|
|
* - 'R' For decoded struct resource, e.g., [mem 0x0-0x1f 64bit pref]
|
|
* - 'r' For raw struct resource, e.g., [mem 0x0-0x1f flags 0x201]
|
|
* - 'M' For a 6-byte MAC address, it prints the address in the
|
|
* usual colon-separated hex notation
|
|
* - 'm' For a 6-byte MAC address, it prints the hex address without colons
|
|
* - 'MF' For a 6-byte MAC FDDI address, it prints the address
|
|
* with a dash-separated hex notation
|
|
* - '[mM]R' For a 6-byte MAC address, Reverse order (Bluetooth)
|
|
* - 'I' [46] for IPv4/IPv6 addresses printed in the usual way
|
|
* IPv4 uses dot-separated decimal without leading 0's (1.2.3.4)
|
|
* IPv6 uses colon separated network-order 16 bit hex with leading 0's
|
|
* [S][pfs]
|
|
* Generic IPv4/IPv6 address (struct sockaddr *) that falls back to
|
|
* [4] or [6] and is able to print port [p], flowinfo [f], scope [s]
|
|
* - 'i' [46] for 'raw' IPv4/IPv6 addresses
|
|
* IPv6 omits the colons (01020304...0f)
|
|
* IPv4 uses dot-separated decimal with leading 0's (010.123.045.006)
|
|
* [S][pfs]
|
|
* Generic IPv4/IPv6 address (struct sockaddr *) that falls back to
|
|
* [4] or [6] and is able to print port [p], flowinfo [f], scope [s]
|
|
* - '[Ii][4S][hnbl]' IPv4 addresses in host, network, big or little endian order
|
|
* - 'I[6S]c' for IPv6 addresses printed as specified by
|
|
* http://tools.ietf.org/html/rfc5952
|
|
* - 'U' For a 16 byte UUID/GUID, it prints the UUID/GUID in the form
|
|
* "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
|
|
* Options for %pU are:
|
|
* b big endian lower case hex (default)
|
|
* B big endian UPPER case hex
|
|
* l little endian lower case hex
|
|
* L little endian UPPER case hex
|
|
* big endian output byte order is:
|
|
* [0][1][2][3]-[4][5]-[6][7]-[8][9]-[10][11][12][13][14][15]
|
|
* little endian output byte order is:
|
|
* [3][2][1][0]-[5][4]-[7][6]-[8][9]-[10][11][12][13][14][15]
|
|
* - 'V' For a struct va_format which contains a format string * and va_list *,
|
|
* call vsnprintf(->format, *->va_list).
|
|
* Implements a "recursive vsnprintf".
|
|
* Do not use this feature without some mechanism to verify the
|
|
* correctness of the format string and va_list arguments.
|
|
* - 'K' For a kernel pointer that should be hidden from unprivileged users
|
|
* - 'NF' For a netdev_features_t
|
|
* - 'h[CDN]' For a variable-length buffer, it prints it as a hex string with
|
|
* a certain separator (' ' by default):
|
|
* C colon
|
|
* D dash
|
|
* N no separator
|
|
* The maximum supported length is 64 bytes of the input. Consider
|
|
* to use print_hex_dump() for the larger input.
|
|
* - 'a' For a phys_addr_t type and its derivative types (passed by reference)
|
|
*
|
|
* Note: The difference between 'S' and 'F' is that on ia64 and ppc64
|
|
* function pointers are really function descriptors, which contain a
|
|
* pointer to the real address.
|
|
*/
|
|
static noinline_for_stack
|
|
char *pointer(const char *fmt, char *buf, char *end, void *ptr,
|
|
struct printf_spec spec)
|
|
{
|
|
int default_width = 2 * sizeof(void *) + (spec.flags & SPECIAL ? 2 : 0);
|
|
|
|
if (!ptr && *fmt != 'K') {
|
|
/*
|
|
* Print (null) with the same width as a pointer so it makes
|
|
* tabular output look nice.
|
|
*/
|
|
if (spec.field_width == -1)
|
|
spec.field_width = default_width;
|
|
return string(buf, end, "(null)", spec);
|
|
}
|
|
|
|
switch (*fmt) {
|
|
case 'F':
|
|
case 'f':
|
|
ptr = dereference_function_descriptor(ptr);
|
|
/* Fallthrough */
|
|
case 'S':
|
|
case 's':
|
|
case 'B':
|
|
return symbol_string(buf, end, ptr, spec, fmt);
|
|
case 'R':
|
|
case 'r':
|
|
return resource_string(buf, end, ptr, spec, fmt);
|
|
case 'h':
|
|
return hex_string(buf, end, ptr, spec, fmt);
|
|
case 'M': /* Colon separated: 00:01:02:03:04:05 */
|
|
case 'm': /* Contiguous: 000102030405 */
|
|
/* [mM]F (FDDI) */
|
|
/* [mM]R (Reverse order; Bluetooth) */
|
|
return mac_address_string(buf, end, ptr, spec, fmt);
|
|
case 'I': /* Formatted IP supported
|
|
* 4: 1.2.3.4
|
|
* 6: 0001:0203:...:0708
|
|
* 6c: 1::708 or 1::1.2.3.4
|
|
*/
|
|
case 'i': /* Contiguous:
|
|
* 4: 001.002.003.004
|
|
* 6: 000102...0f
|
|
*/
|
|
switch (fmt[1]) {
|
|
case '6':
|
|
return ip6_addr_string(buf, end, ptr, spec, fmt);
|
|
case '4':
|
|
return ip4_addr_string(buf, end, ptr, spec, fmt);
|
|
case 'S': {
|
|
const union {
|
|
struct sockaddr raw;
|
|
struct sockaddr_in v4;
|
|
struct sockaddr_in6 v6;
|
|
} *sa = ptr;
|
|
|
|
switch (sa->raw.sa_family) {
|
|
case AF_INET:
|
|
return ip4_addr_string_sa(buf, end, &sa->v4, spec, fmt);
|
|
case AF_INET6:
|
|
return ip6_addr_string_sa(buf, end, &sa->v6, spec, fmt);
|
|
default:
|
|
return string(buf, end, "(invalid address)", spec);
|
|
}}
|
|
}
|
|
break;
|
|
case 'U':
|
|
return uuid_string(buf, end, ptr, spec, fmt);
|
|
case 'V':
|
|
{
|
|
va_list va;
|
|
|
|
va_copy(va, *((struct va_format *)ptr)->va);
|
|
buf += vsnprintf(buf, end > buf ? end - buf : 0,
|
|
((struct va_format *)ptr)->fmt, va);
|
|
va_end(va);
|
|
return buf;
|
|
}
|
|
case 'K':
|
|
/*
|
|
* %pK cannot be used in IRQ context because its test
|
|
* for CAP_SYSLOG would be meaningless.
|
|
*/
|
|
if (kptr_restrict && (in_irq() || in_serving_softirq() ||
|
|
in_nmi())) {
|
|
if (spec.field_width == -1)
|
|
spec.field_width = default_width;
|
|
return string(buf, end, "pK-error", spec);
|
|
}
|
|
if (!((kptr_restrict == 0) ||
|
|
(kptr_restrict == 1 &&
|
|
has_capability_noaudit(current, CAP_SYSLOG))))
|
|
ptr = NULL;
|
|
break;
|
|
case 'N':
|
|
switch (fmt[1]) {
|
|
case 'F':
|
|
return netdev_feature_string(buf, end, ptr, spec);
|
|
}
|
|
break;
|
|
case 'a':
|
|
spec.flags |= SPECIAL | SMALL | ZEROPAD;
|
|
spec.field_width = sizeof(phys_addr_t) * 2 + 2;
|
|
spec.base = 16;
|
|
return number(buf, end,
|
|
(unsigned long long) *((phys_addr_t *)ptr), spec);
|
|
}
|
|
spec.flags |= SMALL;
|
|
if (spec.field_width == -1) {
|
|
spec.field_width = default_width;
|
|
spec.flags |= ZEROPAD;
|
|
}
|
|
spec.base = 16;
|
|
|
|
return number(buf, end, (unsigned long) ptr, spec);
|
|
}
|
|
|
|
/*
|
|
* Helper function to decode printf style format.
|
|
* Each call decode a token from the format and return the
|
|
* number of characters read (or likely the delta where it wants
|
|
* to go on the next call).
|
|
* The decoded token is returned through the parameters
|
|
*
|
|
* 'h', 'l', or 'L' for integer fields
|
|
* 'z' support added 23/7/1999 S.H.
|
|
* 'z' changed to 'Z' --davidm 1/25/99
|
|
* 't' added for ptrdiff_t
|
|
*
|
|
* @fmt: the format string
|
|
* @type of the token returned
|
|
* @flags: various flags such as +, -, # tokens..
|
|
* @field_width: overwritten width
|
|
* @base: base of the number (octal, hex, ...)
|
|
* @precision: precision of a number
|
|
* @qualifier: qualifier of a number (long, size_t, ...)
|
|
*/
|
|
static noinline_for_stack
|
|
int format_decode(const char *fmt, struct printf_spec *spec)
|
|
{
|
|
const char *start = fmt;
|
|
|
|
/* we finished early by reading the field width */
|
|
if (spec->type == FORMAT_TYPE_WIDTH) {
|
|
if (spec->field_width < 0) {
|
|
spec->field_width = -spec->field_width;
|
|
spec->flags |= LEFT;
|
|
}
|
|
spec->type = FORMAT_TYPE_NONE;
|
|
goto precision;
|
|
}
|
|
|
|
/* we finished early by reading the precision */
|
|
if (spec->type == FORMAT_TYPE_PRECISION) {
|
|
if (spec->precision < 0)
|
|
spec->precision = 0;
|
|
|
|
spec->type = FORMAT_TYPE_NONE;
|
|
goto qualifier;
|
|
}
|
|
|
|
/* By default */
|
|
spec->type = FORMAT_TYPE_NONE;
|
|
|
|
for (; *fmt ; ++fmt) {
|
|
if (*fmt == '%')
|
|
break;
|
|
}
|
|
|
|
/* Return the current non-format string */
|
|
if (fmt != start || !*fmt)
|
|
return fmt - start;
|
|
|
|
/* Process flags */
|
|
spec->flags = 0;
|
|
|
|
while (1) { /* this also skips first '%' */
|
|
bool found = true;
|
|
|
|
++fmt;
|
|
|
|
switch (*fmt) {
|
|
case '-': spec->flags |= LEFT; break;
|
|
case '+': spec->flags |= PLUS; break;
|
|
case ' ': spec->flags |= SPACE; break;
|
|
case '#': spec->flags |= SPECIAL; break;
|
|
case '0': spec->flags |= ZEROPAD; break;
|
|
default: found = false;
|
|
}
|
|
|
|
if (!found)
|
|
break;
|
|
}
|
|
|
|
/* get field width */
|
|
spec->field_width = -1;
|
|
|
|
if (isdigit(*fmt))
|
|
spec->field_width = skip_atoi(&fmt);
|
|
else if (*fmt == '*') {
|
|
/* it's the next argument */
|
|
spec->type = FORMAT_TYPE_WIDTH;
|
|
return ++fmt - start;
|
|
}
|
|
|
|
precision:
|
|
/* get the precision */
|
|
spec->precision = -1;
|
|
if (*fmt == '.') {
|
|
++fmt;
|
|
if (isdigit(*fmt)) {
|
|
spec->precision = skip_atoi(&fmt);
|
|
if (spec->precision < 0)
|
|
spec->precision = 0;
|
|
} else if (*fmt == '*') {
|
|
/* it's the next argument */
|
|
spec->type = FORMAT_TYPE_PRECISION;
|
|
return ++fmt - start;
|
|
}
|
|
}
|
|
|
|
qualifier:
|
|
/* get the conversion qualifier */
|
|
spec->qualifier = -1;
|
|
if (*fmt == 'h' || _tolower(*fmt) == 'l' ||
|
|
_tolower(*fmt) == 'z' || *fmt == 't') {
|
|
spec->qualifier = *fmt++;
|
|
if (unlikely(spec->qualifier == *fmt)) {
|
|
if (spec->qualifier == 'l') {
|
|
spec->qualifier = 'L';
|
|
++fmt;
|
|
} else if (spec->qualifier == 'h') {
|
|
spec->qualifier = 'H';
|
|
++fmt;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* default base */
|
|
spec->base = 10;
|
|
switch (*fmt) {
|
|
case 'c':
|
|
spec->type = FORMAT_TYPE_CHAR;
|
|
return ++fmt - start;
|
|
|
|
case 's':
|
|
spec->type = FORMAT_TYPE_STR;
|
|
return ++fmt - start;
|
|
|
|
case 'p':
|
|
spec->type = FORMAT_TYPE_PTR;
|
|
return fmt - start;
|
|
/* skip alnum */
|
|
|
|
case 'n':
|
|
spec->type = FORMAT_TYPE_NRCHARS;
|
|
return ++fmt - start;
|
|
|
|
case '%':
|
|
spec->type = FORMAT_TYPE_PERCENT_CHAR;
|
|
return ++fmt - start;
|
|
|
|
/* integer number formats - set up the flags and "break" */
|
|
case 'o':
|
|
spec->base = 8;
|
|
break;
|
|
|
|
case 'x':
|
|
spec->flags |= SMALL;
|
|
|
|
case 'X':
|
|
spec->base = 16;
|
|
break;
|
|
|
|
case 'd':
|
|
case 'i':
|
|
spec->flags |= SIGN;
|
|
case 'u':
|
|
break;
|
|
|
|
default:
|
|
spec->type = FORMAT_TYPE_INVALID;
|
|
return fmt - start;
|
|
}
|
|
|
|
if (spec->qualifier == 'L')
|
|
spec->type = FORMAT_TYPE_LONG_LONG;
|
|
else if (spec->qualifier == 'l') {
|
|
if (spec->flags & SIGN)
|
|
spec->type = FORMAT_TYPE_LONG;
|
|
else
|
|
spec->type = FORMAT_TYPE_ULONG;
|
|
} else if (_tolower(spec->qualifier) == 'z') {
|
|
spec->type = FORMAT_TYPE_SIZE_T;
|
|
} else if (spec->qualifier == 't') {
|
|
spec->type = FORMAT_TYPE_PTRDIFF;
|
|
} else if (spec->qualifier == 'H') {
|
|
if (spec->flags & SIGN)
|
|
spec->type = FORMAT_TYPE_BYTE;
|
|
else
|
|
spec->type = FORMAT_TYPE_UBYTE;
|
|
} else if (spec->qualifier == 'h') {
|
|
if (spec->flags & SIGN)
|
|
spec->type = FORMAT_TYPE_SHORT;
|
|
else
|
|
spec->type = FORMAT_TYPE_USHORT;
|
|
} else {
|
|
if (spec->flags & SIGN)
|
|
spec->type = FORMAT_TYPE_INT;
|
|
else
|
|
spec->type = FORMAT_TYPE_UINT;
|
|
}
|
|
|
|
return ++fmt - start;
|
|
}
|
|
|
|
/**
|
|
* vsnprintf - Format a string and place it in a buffer
|
|
* @buf: The buffer to place the result into
|
|
* @size: The size of the buffer, including the trailing null space
|
|
* @fmt: The format string to use
|
|
* @args: Arguments for the format string
|
|
*
|
|
* This function follows C99 vsnprintf, but has some extensions:
|
|
* %pS output the name of a text symbol with offset
|
|
* %ps output the name of a text symbol without offset
|
|
* %pF output the name of a function pointer with its offset
|
|
* %pf output the name of a function pointer without its offset
|
|
* %pB output the name of a backtrace symbol with its offset
|
|
* %pR output the address range in a struct resource with decoded flags
|
|
* %pr output the address range in a struct resource with raw flags
|
|
* %pM output a 6-byte MAC address with colons
|
|
* %pMR output a 6-byte MAC address with colons in reversed order
|
|
* %pMF output a 6-byte MAC address with dashes
|
|
* %pm output a 6-byte MAC address without colons
|
|
* %pmR output a 6-byte MAC address without colons in reversed order
|
|
* %pI4 print an IPv4 address without leading zeros
|
|
* %pi4 print an IPv4 address with leading zeros
|
|
* %pI6 print an IPv6 address with colons
|
|
* %pi6 print an IPv6 address without colons
|
|
* %pI6c print an IPv6 address as specified by RFC 5952
|
|
* %pIS depending on sa_family of 'struct sockaddr *' print IPv4/IPv6 address
|
|
* %piS depending on sa_family of 'struct sockaddr *' print IPv4/IPv6 address
|
|
* %pU[bBlL] print a UUID/GUID in big or little endian using lower or upper
|
|
* case.
|
|
* %*ph[CDN] a variable-length hex string with a separator (supports up to 64
|
|
* bytes of the input)
|
|
* %n is ignored
|
|
*
|
|
* ** Please update Documentation/printk-formats.txt when making changes **
|
|
*
|
|
* The return value is the number of characters which would
|
|
* be generated for the given input, excluding the trailing
|
|
* '\0', as per ISO C99. If you want to have the exact
|
|
* number of characters written into @buf as return value
|
|
* (not including the trailing '\0'), use vscnprintf(). If the
|
|
* return is greater than or equal to @size, the resulting
|
|
* string is truncated.
|
|
*
|
|
* If you're not already dealing with a va_list consider using snprintf().
|
|
*/
|
|
int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
|
|
{
|
|
unsigned long long num;
|
|
char *str, *end;
|
|
struct printf_spec spec = {0};
|
|
|
|
/* Reject out-of-range values early. Large positive sizes are
|
|
used for unknown buffer sizes. */
|
|
if (WARN_ON_ONCE((int) size < 0))
|
|
return 0;
|
|
|
|
str = buf;
|
|
end = buf + size;
|
|
|
|
/* Make sure end is always >= buf */
|
|
if (end < buf) {
|
|
end = ((void *)-1);
|
|
size = end - buf;
|
|
}
|
|
|
|
while (*fmt) {
|
|
const char *old_fmt = fmt;
|
|
int read = format_decode(fmt, &spec);
|
|
|
|
fmt += read;
|
|
|
|
switch (spec.type) {
|
|
case FORMAT_TYPE_NONE: {
|
|
int copy = read;
|
|
if (str < end) {
|
|
if (copy > end - str)
|
|
copy = end - str;
|
|
memcpy(str, old_fmt, copy);
|
|
}
|
|
str += read;
|
|
break;
|
|
}
|
|
|
|
case FORMAT_TYPE_WIDTH:
|
|
spec.field_width = va_arg(args, int);
|
|
break;
|
|
|
|
case FORMAT_TYPE_PRECISION:
|
|
spec.precision = va_arg(args, int);
|
|
break;
|
|
|
|
case FORMAT_TYPE_CHAR: {
|
|
char c;
|
|
|
|
if (!(spec.flags & LEFT)) {
|
|
while (--spec.field_width > 0) {
|
|
if (str < end)
|
|
*str = ' ';
|
|
++str;
|
|
|
|
}
|
|
}
|
|
c = (unsigned char) va_arg(args, int);
|
|
if (str < end)
|
|
*str = c;
|
|
++str;
|
|
while (--spec.field_width > 0) {
|
|
if (str < end)
|
|
*str = ' ';
|
|
++str;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case FORMAT_TYPE_STR:
|
|
str = string(str, end, va_arg(args, char *), spec);
|
|
break;
|
|
|
|
case FORMAT_TYPE_PTR:
|
|
str = pointer(fmt+1, str, end, va_arg(args, void *),
|
|
spec);
|
|
while (isalnum(*fmt))
|
|
fmt++;
|
|
break;
|
|
|
|
case FORMAT_TYPE_PERCENT_CHAR:
|
|
if (str < end)
|
|
*str = '%';
|
|
++str;
|
|
break;
|
|
|
|
case FORMAT_TYPE_INVALID:
|
|
if (str < end)
|
|
*str = '%';
|
|
++str;
|
|
break;
|
|
|
|
case FORMAT_TYPE_NRCHARS: {
|
|
u8 qualifier = spec.qualifier;
|
|
|
|
if (qualifier == 'l') {
|
|
long *ip = va_arg(args, long *);
|
|
*ip = (str - buf);
|
|
} else if (_tolower(qualifier) == 'z') {
|
|
size_t *ip = va_arg(args, size_t *);
|
|
*ip = (str - buf);
|
|
} else {
|
|
int *ip = va_arg(args, int *);
|
|
*ip = (str - buf);
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
switch (spec.type) {
|
|
case FORMAT_TYPE_LONG_LONG:
|
|
num = va_arg(args, long long);
|
|
break;
|
|
case FORMAT_TYPE_ULONG:
|
|
num = va_arg(args, unsigned long);
|
|
break;
|
|
case FORMAT_TYPE_LONG:
|
|
num = va_arg(args, long);
|
|
break;
|
|
case FORMAT_TYPE_SIZE_T:
|
|
if (spec.flags & SIGN)
|
|
num = va_arg(args, ssize_t);
|
|
else
|
|
num = va_arg(args, size_t);
|
|
break;
|
|
case FORMAT_TYPE_PTRDIFF:
|
|
num = va_arg(args, ptrdiff_t);
|
|
break;
|
|
case FORMAT_TYPE_UBYTE:
|
|
num = (unsigned char) va_arg(args, int);
|
|
break;
|
|
case FORMAT_TYPE_BYTE:
|
|
num = (signed char) va_arg(args, int);
|
|
break;
|
|
case FORMAT_TYPE_USHORT:
|
|
num = (unsigned short) va_arg(args, int);
|
|
break;
|
|
case FORMAT_TYPE_SHORT:
|
|
num = (short) va_arg(args, int);
|
|
break;
|
|
case FORMAT_TYPE_INT:
|
|
num = (int) va_arg(args, int);
|
|
break;
|
|
default:
|
|
num = va_arg(args, unsigned int);
|
|
}
|
|
|
|
str = number(str, end, num, spec);
|
|
}
|
|
}
|
|
|
|
if (size > 0) {
|
|
if (str < end)
|
|
*str = '\0';
|
|
else
|
|
end[-1] = '\0';
|
|
}
|
|
|
|
/* the trailing null byte doesn't count towards the total */
|
|
return str-buf;
|
|
|
|
}
|
|
EXPORT_SYMBOL(vsnprintf);
|
|
|
|
/**
|
|
* vscnprintf - Format a string and place it in a buffer
|
|
* @buf: The buffer to place the result into
|
|
* @size: The size of the buffer, including the trailing null space
|
|
* @fmt: The format string to use
|
|
* @args: Arguments for the format string
|
|
*
|
|
* The return value is the number of characters which have been written into
|
|
* the @buf not including the trailing '\0'. If @size is == 0 the function
|
|
* returns 0.
|
|
*
|
|
* If you're not already dealing with a va_list consider using scnprintf().
|
|
*
|
|
* See the vsnprintf() documentation for format string extensions over C99.
|
|
*/
|
|
int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
|
|
{
|
|
int i;
|
|
|
|
i = vsnprintf(buf, size, fmt, args);
|
|
|
|
if (likely(i < size))
|
|
return i;
|
|
if (size != 0)
|
|
return size - 1;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(vscnprintf);
|
|
|
|
/**
|
|
* snprintf - Format a string and place it in a buffer
|
|
* @buf: The buffer to place the result into
|
|
* @size: The size of the buffer, including the trailing null space
|
|
* @fmt: The format string to use
|
|
* @...: Arguments for the format string
|
|
*
|
|
* The return value is the number of characters which would be
|
|
* generated for the given input, excluding the trailing null,
|
|
* as per ISO C99. If the return is greater than or equal to
|
|
* @size, the resulting string is truncated.
|
|
*
|
|
* See the vsnprintf() documentation for format string extensions over C99.
|
|
*/
|
|
int snprintf(char *buf, size_t size, const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
int i;
|
|
|
|
va_start(args, fmt);
|
|
i = vsnprintf(buf, size, fmt, args);
|
|
va_end(args);
|
|
|
|
return i;
|
|
}
|
|
EXPORT_SYMBOL(snprintf);
|
|
|
|
/**
|
|
* scnprintf - Format a string and place it in a buffer
|
|
* @buf: The buffer to place the result into
|
|
* @size: The size of the buffer, including the trailing null space
|
|
* @fmt: The format string to use
|
|
* @...: Arguments for the format string
|
|
*
|
|
* The return value is the number of characters written into @buf not including
|
|
* the trailing '\0'. If @size is == 0 the function returns 0.
|
|
*/
|
|
|
|
int scnprintf(char *buf, size_t size, const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
int i;
|
|
|
|
va_start(args, fmt);
|
|
i = vscnprintf(buf, size, fmt, args);
|
|
va_end(args);
|
|
|
|
return i;
|
|
}
|
|
EXPORT_SYMBOL(scnprintf);
|
|
|
|
/**
|
|
* vsprintf - Format a string and place it in a buffer
|
|
* @buf: The buffer to place the result into
|
|
* @fmt: The format string to use
|
|
* @args: Arguments for the format string
|
|
*
|
|
* The function returns the number of characters written
|
|
* into @buf. Use vsnprintf() or vscnprintf() in order to avoid
|
|
* buffer overflows.
|
|
*
|
|
* If you're not already dealing with a va_list consider using sprintf().
|
|
*
|
|
* See the vsnprintf() documentation for format string extensions over C99.
|
|
*/
|
|
int vsprintf(char *buf, const char *fmt, va_list args)
|
|
{
|
|
return vsnprintf(buf, INT_MAX, fmt, args);
|
|
}
|
|
EXPORT_SYMBOL(vsprintf);
|
|
|
|
/**
|
|
* sprintf - Format a string and place it in a buffer
|
|
* @buf: The buffer to place the result into
|
|
* @fmt: The format string to use
|
|
* @...: Arguments for the format string
|
|
*
|
|
* The function returns the number of characters written
|
|
* into @buf. Use snprintf() or scnprintf() in order to avoid
|
|
* buffer overflows.
|
|
*
|
|
* See the vsnprintf() documentation for format string extensions over C99.
|
|
*/
|
|
int sprintf(char *buf, const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
int i;
|
|
|
|
va_start(args, fmt);
|
|
i = vsnprintf(buf, INT_MAX, fmt, args);
|
|
va_end(args);
|
|
|
|
return i;
|
|
}
|
|
EXPORT_SYMBOL(sprintf);
|
|
|
|
#ifdef CONFIG_BINARY_PRINTF
|
|
/*
|
|
* bprintf service:
|
|
* vbin_printf() - VA arguments to binary data
|
|
* bstr_printf() - Binary data to text string
|
|
*/
|
|
|
|
/**
|
|
* vbin_printf - Parse a format string and place args' binary value in a buffer
|
|
* @bin_buf: The buffer to place args' binary value
|
|
* @size: The size of the buffer(by words(32bits), not characters)
|
|
* @fmt: The format string to use
|
|
* @args: Arguments for the format string
|
|
*
|
|
* The format follows C99 vsnprintf, except %n is ignored, and its argument
|
|
* is skiped.
|
|
*
|
|
* The return value is the number of words(32bits) which would be generated for
|
|
* the given input.
|
|
*
|
|
* NOTE:
|
|
* If the return value is greater than @size, the resulting bin_buf is NOT
|
|
* valid for bstr_printf().
|
|
*/
|
|
int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args)
|
|
{
|
|
struct printf_spec spec = {0};
|
|
char *str, *end;
|
|
|
|
str = (char *)bin_buf;
|
|
end = (char *)(bin_buf + size);
|
|
|
|
#define save_arg(type) \
|
|
do { \
|
|
if (sizeof(type) == 8) { \
|
|
unsigned long long value; \
|
|
str = PTR_ALIGN(str, sizeof(u32)); \
|
|
value = va_arg(args, unsigned long long); \
|
|
if (str + sizeof(type) <= end) { \
|
|
*(u32 *)str = *(u32 *)&value; \
|
|
*(u32 *)(str + 4) = *((u32 *)&value + 1); \
|
|
} \
|
|
} else { \
|
|
unsigned long value; \
|
|
str = PTR_ALIGN(str, sizeof(type)); \
|
|
value = va_arg(args, int); \
|
|
if (str + sizeof(type) <= end) \
|
|
*(typeof(type) *)str = (type)value; \
|
|
} \
|
|
str += sizeof(type); \
|
|
} while (0)
|
|
|
|
while (*fmt) {
|
|
int read = format_decode(fmt, &spec);
|
|
|
|
fmt += read;
|
|
|
|
switch (spec.type) {
|
|
case FORMAT_TYPE_NONE:
|
|
case FORMAT_TYPE_INVALID:
|
|
case FORMAT_TYPE_PERCENT_CHAR:
|
|
break;
|
|
|
|
case FORMAT_TYPE_WIDTH:
|
|
case FORMAT_TYPE_PRECISION:
|
|
save_arg(int);
|
|
break;
|
|
|
|
case FORMAT_TYPE_CHAR:
|
|
save_arg(char);
|
|
break;
|
|
|
|
case FORMAT_TYPE_STR: {
|
|
const char *save_str = va_arg(args, char *);
|
|
size_t len;
|
|
|
|
if ((unsigned long)save_str > (unsigned long)-PAGE_SIZE
|
|
|| (unsigned long)save_str < PAGE_SIZE)
|
|
save_str = "(null)";
|
|
len = strlen(save_str) + 1;
|
|
if (str + len < end)
|
|
memcpy(str, save_str, len);
|
|
str += len;
|
|
break;
|
|
}
|
|
|
|
case FORMAT_TYPE_PTR:
|
|
save_arg(void *);
|
|
/* skip all alphanumeric pointer suffixes */
|
|
while (isalnum(*fmt))
|
|
fmt++;
|
|
break;
|
|
|
|
case FORMAT_TYPE_NRCHARS: {
|
|
/* skip %n 's argument */
|
|
u8 qualifier = spec.qualifier;
|
|
void *skip_arg;
|
|
if (qualifier == 'l')
|
|
skip_arg = va_arg(args, long *);
|
|
else if (_tolower(qualifier) == 'z')
|
|
skip_arg = va_arg(args, size_t *);
|
|
else
|
|
skip_arg = va_arg(args, int *);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
switch (spec.type) {
|
|
|
|
case FORMAT_TYPE_LONG_LONG:
|
|
save_arg(long long);
|
|
break;
|
|
case FORMAT_TYPE_ULONG:
|
|
case FORMAT_TYPE_LONG:
|
|
save_arg(unsigned long);
|
|
break;
|
|
case FORMAT_TYPE_SIZE_T:
|
|
save_arg(size_t);
|
|
break;
|
|
case FORMAT_TYPE_PTRDIFF:
|
|
save_arg(ptrdiff_t);
|
|
break;
|
|
case FORMAT_TYPE_UBYTE:
|
|
case FORMAT_TYPE_BYTE:
|
|
save_arg(char);
|
|
break;
|
|
case FORMAT_TYPE_USHORT:
|
|
case FORMAT_TYPE_SHORT:
|
|
save_arg(short);
|
|
break;
|
|
default:
|
|
save_arg(int);
|
|
}
|
|
}
|
|
}
|
|
|
|
return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf;
|
|
#undef save_arg
|
|
}
|
|
EXPORT_SYMBOL_GPL(vbin_printf);
|
|
|
|
/**
|
|
* bstr_printf - Format a string from binary arguments and place it in a buffer
|
|
* @buf: The buffer to place the result into
|
|
* @size: The size of the buffer, including the trailing null space
|
|
* @fmt: The format string to use
|
|
* @bin_buf: Binary arguments for the format string
|
|
*
|
|
* This function like C99 vsnprintf, but the difference is that vsnprintf gets
|
|
* arguments from stack, and bstr_printf gets arguments from @bin_buf which is
|
|
* a binary buffer that generated by vbin_printf.
|
|
*
|
|
* The format follows C99 vsnprintf, but has some extensions:
|
|
* see vsnprintf comment for details.
|
|
*
|
|
* The return value is the number of characters which would
|
|
* be generated for the given input, excluding the trailing
|
|
* '\0', as per ISO C99. If you want to have the exact
|
|
* number of characters written into @buf as return value
|
|
* (not including the trailing '\0'), use vscnprintf(). If the
|
|
* return is greater than or equal to @size, the resulting
|
|
* string is truncated.
|
|
*/
|
|
int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
|
|
{
|
|
struct printf_spec spec = {0};
|
|
char *str, *end;
|
|
const char *args = (const char *)bin_buf;
|
|
|
|
if (WARN_ON_ONCE((int) size < 0))
|
|
return 0;
|
|
|
|
str = buf;
|
|
end = buf + size;
|
|
|
|
#define get_arg(type) \
|
|
({ \
|
|
typeof(type) value; \
|
|
if (sizeof(type) == 8) { \
|
|
args = PTR_ALIGN(args, sizeof(u32)); \
|
|
*(u32 *)&value = *(u32 *)args; \
|
|
*((u32 *)&value + 1) = *(u32 *)(args + 4); \
|
|
} else { \
|
|
args = PTR_ALIGN(args, sizeof(type)); \
|
|
value = *(typeof(type) *)args; \
|
|
} \
|
|
args += sizeof(type); \
|
|
value; \
|
|
})
|
|
|
|
/* Make sure end is always >= buf */
|
|
if (end < buf) {
|
|
end = ((void *)-1);
|
|
size = end - buf;
|
|
}
|
|
|
|
while (*fmt) {
|
|
const char *old_fmt = fmt;
|
|
int read = format_decode(fmt, &spec);
|
|
|
|
fmt += read;
|
|
|
|
switch (spec.type) {
|
|
case FORMAT_TYPE_NONE: {
|
|
int copy = read;
|
|
if (str < end) {
|
|
if (copy > end - str)
|
|
copy = end - str;
|
|
memcpy(str, old_fmt, copy);
|
|
}
|
|
str += read;
|
|
break;
|
|
}
|
|
|
|
case FORMAT_TYPE_WIDTH:
|
|
spec.field_width = get_arg(int);
|
|
break;
|
|
|
|
case FORMAT_TYPE_PRECISION:
|
|
spec.precision = get_arg(int);
|
|
break;
|
|
|
|
case FORMAT_TYPE_CHAR: {
|
|
char c;
|
|
|
|
if (!(spec.flags & LEFT)) {
|
|
while (--spec.field_width > 0) {
|
|
if (str < end)
|
|
*str = ' ';
|
|
++str;
|
|
}
|
|
}
|
|
c = (unsigned char) get_arg(char);
|
|
if (str < end)
|
|
*str = c;
|
|
++str;
|
|
while (--spec.field_width > 0) {
|
|
if (str < end)
|
|
*str = ' ';
|
|
++str;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case FORMAT_TYPE_STR: {
|
|
const char *str_arg = args;
|
|
args += strlen(str_arg) + 1;
|
|
str = string(str, end, (char *)str_arg, spec);
|
|
break;
|
|
}
|
|
|
|
case FORMAT_TYPE_PTR:
|
|
str = pointer(fmt+1, str, end, get_arg(void *), spec);
|
|
while (isalnum(*fmt))
|
|
fmt++;
|
|
break;
|
|
|
|
case FORMAT_TYPE_PERCENT_CHAR:
|
|
case FORMAT_TYPE_INVALID:
|
|
if (str < end)
|
|
*str = '%';
|
|
++str;
|
|
break;
|
|
|
|
case FORMAT_TYPE_NRCHARS:
|
|
/* skip */
|
|
break;
|
|
|
|
default: {
|
|
unsigned long long num;
|
|
|
|
switch (spec.type) {
|
|
|
|
case FORMAT_TYPE_LONG_LONG:
|
|
num = get_arg(long long);
|
|
break;
|
|
case FORMAT_TYPE_ULONG:
|
|
case FORMAT_TYPE_LONG:
|
|
num = get_arg(unsigned long);
|
|
break;
|
|
case FORMAT_TYPE_SIZE_T:
|
|
num = get_arg(size_t);
|
|
break;
|
|
case FORMAT_TYPE_PTRDIFF:
|
|
num = get_arg(ptrdiff_t);
|
|
break;
|
|
case FORMAT_TYPE_UBYTE:
|
|
num = get_arg(unsigned char);
|
|
break;
|
|
case FORMAT_TYPE_BYTE:
|
|
num = get_arg(signed char);
|
|
break;
|
|
case FORMAT_TYPE_USHORT:
|
|
num = get_arg(unsigned short);
|
|
break;
|
|
case FORMAT_TYPE_SHORT:
|
|
num = get_arg(short);
|
|
break;
|
|
case FORMAT_TYPE_UINT:
|
|
num = get_arg(unsigned int);
|
|
break;
|
|
default:
|
|
num = get_arg(int);
|
|
}
|
|
|
|
str = number(str, end, num, spec);
|
|
} /* default: */
|
|
} /* switch(spec.type) */
|
|
} /* while(*fmt) */
|
|
|
|
if (size > 0) {
|
|
if (str < end)
|
|
*str = '\0';
|
|
else
|
|
end[-1] = '\0';
|
|
}
|
|
|
|
#undef get_arg
|
|
|
|
/* the trailing null byte doesn't count towards the total */
|
|
return str - buf;
|
|
}
|
|
EXPORT_SYMBOL_GPL(bstr_printf);
|
|
|
|
/**
|
|
* bprintf - Parse a format string and place args' binary value in a buffer
|
|
* @bin_buf: The buffer to place args' binary value
|
|
* @size: The size of the buffer(by words(32bits), not characters)
|
|
* @fmt: The format string to use
|
|
* @...: Arguments for the format string
|
|
*
|
|
* The function returns the number of words(u32) written
|
|
* into @bin_buf.
|
|
*/
|
|
int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
int ret;
|
|
|
|
va_start(args, fmt);
|
|
ret = vbin_printf(bin_buf, size, fmt, args);
|
|
va_end(args);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(bprintf);
|
|
|
|
#endif /* CONFIG_BINARY_PRINTF */
|
|
|
|
/**
|
|
* vsscanf - Unformat a buffer into a list of arguments
|
|
* @buf: input buffer
|
|
* @fmt: format of buffer
|
|
* @args: arguments
|
|
*/
|
|
int vsscanf(const char *buf, const char *fmt, va_list args)
|
|
{
|
|
const char *str = buf;
|
|
char *next;
|
|
char digit;
|
|
int num = 0;
|
|
u8 qualifier;
|
|
unsigned int base;
|
|
union {
|
|
long long s;
|
|
unsigned long long u;
|
|
} val;
|
|
s16 field_width;
|
|
bool is_sign;
|
|
|
|
while (*fmt) {
|
|
/* skip any white space in format */
|
|
/* white space in format matchs any amount of
|
|
* white space, including none, in the input.
|
|
*/
|
|
if (isspace(*fmt)) {
|
|
fmt = skip_spaces(++fmt);
|
|
str = skip_spaces(str);
|
|
}
|
|
|
|
/* anything that is not a conversion must match exactly */
|
|
if (*fmt != '%' && *fmt) {
|
|
if (*fmt++ != *str++)
|
|
break;
|
|
continue;
|
|
}
|
|
|
|
if (!*fmt)
|
|
break;
|
|
++fmt;
|
|
|
|
/* skip this conversion.
|
|
* advance both strings to next white space
|
|
*/
|
|
if (*fmt == '*') {
|
|
if (!*str)
|
|
break;
|
|
while (!isspace(*fmt) && *fmt != '%' && *fmt)
|
|
fmt++;
|
|
while (!isspace(*str) && *str)
|
|
str++;
|
|
continue;
|
|
}
|
|
|
|
/* get field width */
|
|
field_width = -1;
|
|
if (isdigit(*fmt)) {
|
|
field_width = skip_atoi(&fmt);
|
|
if (field_width <= 0)
|
|
break;
|
|
}
|
|
|
|
/* get conversion qualifier */
|
|
qualifier = -1;
|
|
if (*fmt == 'h' || _tolower(*fmt) == 'l' ||
|
|
_tolower(*fmt) == 'z') {
|
|
qualifier = *fmt++;
|
|
if (unlikely(qualifier == *fmt)) {
|
|
if (qualifier == 'h') {
|
|
qualifier = 'H';
|
|
fmt++;
|
|
} else if (qualifier == 'l') {
|
|
qualifier = 'L';
|
|
fmt++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!*fmt)
|
|
break;
|
|
|
|
if (*fmt == 'n') {
|
|
/* return number of characters read so far */
|
|
*va_arg(args, int *) = str - buf;
|
|
++fmt;
|
|
continue;
|
|
}
|
|
|
|
if (!*str)
|
|
break;
|
|
|
|
base = 10;
|
|
is_sign = 0;
|
|
|
|
switch (*fmt++) {
|
|
case 'c':
|
|
{
|
|
char *s = (char *)va_arg(args, char*);
|
|
if (field_width == -1)
|
|
field_width = 1;
|
|
do {
|
|
*s++ = *str++;
|
|
} while (--field_width > 0 && *str);
|
|
num++;
|
|
}
|
|
continue;
|
|
case 's':
|
|
{
|
|
char *s = (char *)va_arg(args, char *);
|
|
if (field_width == -1)
|
|
field_width = SHRT_MAX;
|
|
/* first, skip leading white space in buffer */
|
|
str = skip_spaces(str);
|
|
|
|
/* now copy until next white space */
|
|
while (*str && !isspace(*str) && field_width--)
|
|
*s++ = *str++;
|
|
*s = '\0';
|
|
num++;
|
|
}
|
|
continue;
|
|
case 'o':
|
|
base = 8;
|
|
break;
|
|
case 'x':
|
|
case 'X':
|
|
base = 16;
|
|
break;
|
|
case 'i':
|
|
base = 0;
|
|
case 'd':
|
|
is_sign = 1;
|
|
case 'u':
|
|
break;
|
|
case '%':
|
|
/* looking for '%' in str */
|
|
if (*str++ != '%')
|
|
return num;
|
|
continue;
|
|
default:
|
|
/* invalid format; stop here */
|
|
return num;
|
|
}
|
|
|
|
/* have some sort of integer conversion.
|
|
* first, skip white space in buffer.
|
|
*/
|
|
str = skip_spaces(str);
|
|
|
|
digit = *str;
|
|
if (is_sign && digit == '-')
|
|
digit = *(str + 1);
|
|
|
|
if (!digit
|
|
|| (base == 16 && !isxdigit(digit))
|
|
|| (base == 10 && !isdigit(digit))
|
|
|| (base == 8 && (!isdigit(digit) || digit > '7'))
|
|
|| (base == 0 && !isdigit(digit)))
|
|
break;
|
|
|
|
if (is_sign)
|
|
val.s = qualifier != 'L' ?
|
|
simple_strtol(str, &next, base) :
|
|
simple_strtoll(str, &next, base);
|
|
else
|
|
val.u = qualifier != 'L' ?
|
|
simple_strtoul(str, &next, base) :
|
|
simple_strtoull(str, &next, base);
|
|
|
|
if (field_width > 0 && next - str > field_width) {
|
|
if (base == 0)
|
|
_parse_integer_fixup_radix(str, &base);
|
|
while (next - str > field_width) {
|
|
if (is_sign)
|
|
val.s = div_s64(val.s, base);
|
|
else
|
|
val.u = div_u64(val.u, base);
|
|
--next;
|
|
}
|
|
}
|
|
|
|
switch (qualifier) {
|
|
case 'H': /* that's 'hh' in format */
|
|
if (is_sign)
|
|
*va_arg(args, signed char *) = val.s;
|
|
else
|
|
*va_arg(args, unsigned char *) = val.u;
|
|
break;
|
|
case 'h':
|
|
if (is_sign)
|
|
*va_arg(args, short *) = val.s;
|
|
else
|
|
*va_arg(args, unsigned short *) = val.u;
|
|
break;
|
|
case 'l':
|
|
if (is_sign)
|
|
*va_arg(args, long *) = val.s;
|
|
else
|
|
*va_arg(args, unsigned long *) = val.u;
|
|
break;
|
|
case 'L':
|
|
if (is_sign)
|
|
*va_arg(args, long long *) = val.s;
|
|
else
|
|
*va_arg(args, unsigned long long *) = val.u;
|
|
break;
|
|
case 'Z':
|
|
case 'z':
|
|
*va_arg(args, size_t *) = val.u;
|
|
break;
|
|
default:
|
|
if (is_sign)
|
|
*va_arg(args, int *) = val.s;
|
|
else
|
|
*va_arg(args, unsigned int *) = val.u;
|
|
break;
|
|
}
|
|
num++;
|
|
|
|
if (!next)
|
|
break;
|
|
str = next;
|
|
}
|
|
|
|
return num;
|
|
}
|
|
EXPORT_SYMBOL(vsscanf);
|
|
|
|
/**
|
|
* sscanf - Unformat a buffer into a list of arguments
|
|
* @buf: input buffer
|
|
* @fmt: formatting of buffer
|
|
* @...: resulting arguments
|
|
*/
|
|
int sscanf(const char *buf, const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
int i;
|
|
|
|
va_start(args, fmt);
|
|
i = vsscanf(buf, fmt, args);
|
|
va_end(args);
|
|
|
|
return i;
|
|
}
|
|
EXPORT_SYMBOL(sscanf);
|