diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig | 4 | ||||
| -rw-r--r-- | lib/Makefile | 3 | ||||
| -rw-r--r-- | lib/decompress.c | 5 | ||||
| -rw-r--r-- | lib/decompress_unlzo.c | 209 | ||||
| -rw-r--r-- | lib/dma-debug.c | 15 | ||||
| -rw-r--r-- | lib/list_sort.c | 102 | ||||
| -rw-r--r-- | lib/lzo/lzo1x_decompress.c | 9 | ||||
| -rw-r--r-- | lib/rational.c | 1 | ||||
| -rw-r--r-- | lib/string.c | 27 | ||||
| -rw-r--r-- | lib/vsprintf.c | 4 | ||||
| -rw-r--r-- | lib/zlib_inflate/inffast.c | 75 |
11 files changed, 434 insertions, 20 deletions
diff --git a/lib/Kconfig b/lib/Kconfig index 1cfe51628e1b..97b136ff117e 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -117,6 +117,10 @@ config DECOMPRESS_BZIP2 config DECOMPRESS_LZMA tristate +config DECOMPRESS_LZO + select LZO_DECOMPRESS + tristate + # # Generic allocator support is selected if needed # diff --git a/lib/Makefile b/lib/Makefile index 347ad8db29d3..3b0b4a696db9 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -21,7 +21,7 @@ lib-y += kobject.o kref.o klist.o obj-y += bcd.o div64.o sort.o parser.o halfmd4.o debug_locks.o random32.o \ bust_spinlocks.o hexdump.o kasprintf.o bitmap.o scatterlist.o \ - string_helpers.o gcd.o + string_helpers.o gcd.o list_sort.o ifeq ($(CONFIG_DEBUG_KOBJECT),y) CFLAGS_kobject.o += -DDEBUG @@ -69,6 +69,7 @@ obj-$(CONFIG_LZO_DECOMPRESS) += lzo/ lib-$(CONFIG_DECOMPRESS_GZIP) += decompress_inflate.o lib-$(CONFIG_DECOMPRESS_BZIP2) += decompress_bunzip2.o lib-$(CONFIG_DECOMPRESS_LZMA) += decompress_unlzma.o +lib-$(CONFIG_DECOMPRESS_LZO) += decompress_unlzo.o obj-$(CONFIG_TEXTSEARCH) += textsearch.o obj-$(CONFIG_TEXTSEARCH_KMP) += ts_kmp.o diff --git a/lib/decompress.c b/lib/decompress.c index d2842f571674..a7606815541f 100644 --- a/lib/decompress.c +++ b/lib/decompress.c @@ -9,6 +9,7 @@ #include <linux/decompress/bunzip2.h> #include <linux/decompress/unlzma.h> #include <linux/decompress/inflate.h> +#include <linux/decompress/unlzo.h> #include <linux/types.h> #include <linux/string.h> @@ -22,6 +23,9 @@ #ifndef CONFIG_DECOMPRESS_LZMA # define unlzma NULL #endif +#ifndef CONFIG_DECOMPRESS_LZO +# define unlzo NULL +#endif static const struct compress_format { unsigned char magic[2]; @@ -32,6 +36,7 @@ static const struct compress_format { { {037, 0236}, "gzip", gunzip }, { {0x42, 0x5a}, "bzip2", bunzip2 }, { {0x5d, 0x00}, "lzma", unlzma }, + { {0x89, 0x4c}, "lzo", unlzo }, { {0, 0}, NULL, NULL } }; diff --git a/lib/decompress_unlzo.c b/lib/decompress_unlzo.c new file mode 100644 index 000000000000..db521f45626e --- /dev/null +++ b/lib/decompress_unlzo.c @@ -0,0 +1,209 @@ +/* + * LZO decompressor for the Linux kernel. Code borrowed from the lzo + * implementation by Markus Franz Xaver Johannes Oberhumer. + * + * Linux kernel adaptation: + * Copyright (C) 2009 + * Albin Tonnerre, Free Electrons <albin.tonnerre@free-electrons.com> + * + * Original code: + * Copyright (C) 1996-2005 Markus Franz Xaver Johannes Oberhumer + * All Rights Reserved. + * + * lzop and the LZO library are free software; you can redistribute them + * and/or modify them under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; see the file COPYING. + * If not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * Markus F.X.J. Oberhumer + * <markus@oberhumer.com> + * http://www.oberhumer.com/opensource/lzop/ + */ + +#ifdef STATIC +#include "lzo/lzo1x_decompress.c" +#else +#include <linux/slab.h> +#include <linux/decompress/unlzo.h> +#endif + +#include <linux/types.h> +#include <linux/lzo.h> +#include <linux/decompress/mm.h> + +#include <linux/compiler.h> +#include <asm/unaligned.h> + +static const unsigned char lzop_magic[] = { + 0x89, 0x4c, 0x5a, 0x4f, 0x00, 0x0d, 0x0a, 0x1a, 0x0a }; + +#define LZO_BLOCK_SIZE (256*1024l) +#define HEADER_HAS_FILTER 0x00000800L + +STATIC inline int INIT parse_header(u8 *input, u8 *skip) +{ + int l; + u8 *parse = input; + u8 level = 0; + u16 version; + + /* read magic: 9 first bits */ + for (l = 0; l < 9; l++) { + if (*parse++ != lzop_magic[l]) + return 0; + } + /* get version (2bytes), skip library version (2), + * 'need to be extracted' version (2) and + * method (1) */ + version = get_unaligned_be16(parse); + parse += 7; + if (version >= 0x0940) + level = *parse++; + if (get_unaligned_be32(parse) & HEADER_HAS_FILTER) + parse += 8; /* flags + filter info */ + else + parse += 4; /* flags */ + + /* skip mode and mtime_low */ + parse += 8; + if (version >= 0x0940) + parse += 4; /* skip mtime_high */ + + l = *parse++; + /* don't care about the file name, and skip checksum */ + parse += l + 4; + + *skip = parse - input; + return 1; +} + +STATIC inline int INIT unlzo(u8 *input, int in_len, + int (*fill) (void *, unsigned int), + int (*flush) (void *, unsigned int), + u8 *output, int *posp, + void (*error_fn) (char *x)) +{ + u8 skip = 0, r = 0; + u32 src_len, dst_len; + size_t tmp; + u8 *in_buf, *in_buf_save, *out_buf; + int obytes_processed = 0; + + set_error_fn(error_fn); + + if (output) { + out_buf = output; + } else if (!flush) { + error("NULL output pointer and no flush function provided"); + goto exit; + } else { + out_buf = malloc(LZO_BLOCK_SIZE); + if (!out_buf) { + error("Could not allocate output buffer"); + goto exit; + } + } + + if (input && fill) { + error("Both input pointer and fill function provided, don't know what to do"); + goto exit_1; + } else if (input) { + in_buf = input; + } else if (!fill || !posp) { + error("NULL input pointer and missing position pointer or fill function"); + goto exit_1; + } else { + in_buf = malloc(lzo1x_worst_compress(LZO_BLOCK_SIZE)); + if (!in_buf) { + error("Could not allocate input buffer"); + goto exit_1; + } + } + in_buf_save = in_buf; + + if (posp) + *posp = 0; + + if (fill) + fill(in_buf, lzo1x_worst_compress(LZO_BLOCK_SIZE)); + + if (!parse_header(input, &skip)) { + error("invalid header"); + goto exit_2; + } + in_buf += skip; + + if (posp) + *posp = skip; + + for (;;) { + /* read uncompressed block size */ + dst_len = get_unaligned_be32(in_buf); + in_buf += 4; + + /* exit if last block */ + if (dst_len == 0) { + if (posp) + *posp += 4; + break; + } + + if (dst_len > LZO_BLOCK_SIZE) { + error("dest len longer than block size"); + goto exit_2; + } + + /* read compressed block size, and skip block checksum info */ + src_len = get_unaligned_be32(in_buf); + in_buf += 8; + + if (src_len <= 0 || src_len > dst_len) { + error("file corrupted"); + goto exit_2; + } + + /* decompress */ + tmp = dst_len; + r = lzo1x_decompress_safe((u8 *) in_buf, src_len, + out_buf, &tmp); + + if (r != LZO_E_OK || dst_len != tmp) { + error("Compressed data violation"); + goto exit_2; + } + + obytes_processed += dst_len; + if (flush) + flush(out_buf, dst_len); + if (output) + out_buf += dst_len; + if (posp) + *posp += src_len + 12; + if (fill) { + in_buf = in_buf_save; + fill(in_buf, lzo1x_worst_compress(LZO_BLOCK_SIZE)); + } else + in_buf += src_len; + } + +exit_2: + if (!input) + free(in_buf); +exit_1: + if (!output) + free(out_buf); +exit: + return obytes_processed; +} + +#define decompress unlzo diff --git a/lib/dma-debug.c b/lib/dma-debug.c index d9b08e0f7f55..7d2f0b33e5a8 100644 --- a/lib/dma-debug.c +++ b/lib/dma-debug.c @@ -670,12 +670,13 @@ static int device_dma_allocations(struct device *dev) return count; } -static int dma_debug_device_change(struct notifier_block *nb, - unsigned long action, void *data) +static int dma_debug_device_change(struct notifier_block *nb, unsigned long action, void *data) { struct device *dev = data; int count; + if (global_disable) + return 0; switch (action) { case BUS_NOTIFY_UNBOUND_DRIVER: @@ -697,6 +698,9 @@ void dma_debug_add_bus(struct bus_type *bus) { struct notifier_block *nb; + if (global_disable) + return; + nb = kzalloc(sizeof(struct notifier_block), GFP_KERNEL); if (nb == NULL) { pr_err("dma_debug_add_bus: out of memory\n"); @@ -909,6 +913,9 @@ static void check_sync(struct device *dev, ref->size); } + if (entry->direction == DMA_BIDIRECTIONAL) + goto out; + if (ref->direction != entry->direction) { err_printk(dev, entry, "DMA-API: device driver syncs " "DMA memory with different direction " @@ -919,9 +926,6 @@ static void check_sync(struct device *dev, dir2name[ref->direction]); } - if (entry->direction == DMA_BIDIRECTIONAL) - goto out; - if (to_cpu && !(entry->direction == DMA_FROM_DEVICE) && !(ref->direction == DMA_TO_DEVICE)) err_printk(dev, entry, "DMA-API: device driver syncs " @@ -944,7 +948,6 @@ static void check_sync(struct device *dev, out: put_hash_bucket(bucket, &flags); - } void debug_dma_map_page(struct device *dev, struct page *page, size_t offset, diff --git a/lib/list_sort.c b/lib/list_sort.c new file mode 100644 index 000000000000..19d11e0bb958 --- /dev/null +++ b/lib/list_sort.c @@ -0,0 +1,102 @@ +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/list_sort.h> +#include <linux/slab.h> +#include <linux/list.h> + +/** + * list_sort - sort a list. + * @priv: private data, passed to @cmp + * @head: the list to sort + * @cmp: the elements comparison function + * + * This function has been implemented by Mark J Roberts <mjr@znex.org>. It + * implements "merge sort" which has O(nlog(n)) complexity. The list is sorted + * in ascending order. + * + * The comparison function @cmp is supposed to return a negative value if @a is + * less than @b, and a positive value if @a is greater than @b. If @a and @b + * are equivalent, then it does not matter what this function returns. + */ +void list_sort(void *priv, struct list_head *head, + int (*cmp)(void *priv, struct list_head *a, + struct list_head *b)) +{ + struct list_head *p, *q, *e, *list, *tail, *oldhead; + int insize, nmerges, psize, qsize, i; + + if (list_empty(head)) + return; + + list = head->next; + list_del(head); + insize = 1; + for (;;) { + p = oldhead = list; + list = tail = NULL; + nmerges = 0; + + while (p) { + nmerges++; + q = p; + psize = 0; + for (i = 0; i < insize; i++) { + psize++; + q = q->next == oldhead ? NULL : q->next; + if (!q) + break; + } + + qsize = insize; + while (psize > 0 || (qsize > 0 && q)) { + if (!psize) { + e = q; + q = q->next; + qsize--; + if (q == oldhead) + q = NULL; + } else if (!qsize || !q) { + e = p; + p = p->next; + psize--; + if (p == oldhead) + p = NULL; + } else if (cmp(priv, p, q) <= 0) { + e = p; + p = p->next; + psize--; + if (p == oldhead) + p = NULL; + } else { + e = q; + q = q->next; + qsize--; + if (q == oldhead) + q = NULL; + } + if (tail) + tail->next = e; + else + list = e; + e->prev = tail; + tail = e; + } + p = q; + } + + tail->next = list; + list->prev = tail; + + if (nmerges <= 1) + break; + + insize *= 2; + } + + head->next = list; + head->prev = list->prev; + list->prev->next = head; + list->prev = head; +} + +EXPORT_SYMBOL(list_sort); diff --git a/lib/lzo/lzo1x_decompress.c b/lib/lzo/lzo1x_decompress.c index 5dc6b29c1575..f2fd09850223 100644 --- a/lib/lzo/lzo1x_decompress.c +++ b/lib/lzo/lzo1x_decompress.c @@ -11,11 +11,13 @@ * Richard Purdie <rpurdie@openedhand.com> */ +#ifndef STATIC #include <linux/module.h> #include <linux/kernel.h> -#include <linux/lzo.h> -#include <asm/byteorder.h> +#endif + #include <asm/unaligned.h> +#include <linux/lzo.h> #include "lzodefs.h" #define HAVE_IP(x, ip_end, ip) ((size_t)(ip_end - ip) < (x)) @@ -244,9 +246,10 @@ lookbehind_overrun: *out_len = op - out; return LZO_E_LOOKBEHIND_OVERRUN; } - +#ifndef STATIC EXPORT_SYMBOL_GPL(lzo1x_decompress_safe); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("LZO1X Decompressor"); +#endif diff --git a/lib/rational.c b/lib/rational.c index b3c099b5478e..3ed247b80662 100644 --- a/lib/rational.c +++ b/lib/rational.c @@ -7,6 +7,7 @@ */ #include <linux/rational.h> +#include <linux/module.h> /* * calculate best rational approximation for a given fraction diff --git a/lib/string.c b/lib/string.c index 9f75b4ec50b8..a1cdcfcc42d0 100644 --- a/lib/string.c +++ b/lib/string.c @@ -667,7 +667,7 @@ EXPORT_SYMBOL(memscan); */ char *strstr(const char *s1, const char *s2) { - int l1, l2; + size_t l1, l2; l2 = strlen(s2); if (!l2) @@ -684,6 +684,31 @@ char *strstr(const char *s1, const char *s2) EXPORT_SYMBOL(strstr); #endif +#ifndef __HAVE_ARCH_STRNSTR +/** + * strnstr - Find the first substring in a length-limited string + * @s1: The string to be searched + * @s2: The string to search for + * @len: the maximum number of characters to search + */ +char *strnstr(const char *s1, const char *s2, size_t len) +{ + size_t l1 = len, l2; + + l2 = strlen(s2); + if (!l2) + return (char *)s1; + while (l1 >= l2) { + l1--; + if (!memcmp(s1, s2, l2)) + return (char *)s1; + s1++; + } + return NULL; +} +EXPORT_SYMBOL(strnstr); +#endif + #ifndef __HAVE_ARCH_MEMCHR /** * memchr - Find a character in an area of memory. diff --git a/lib/vsprintf.c b/lib/vsprintf.c index add0446dd921..af4aaa6c36f3 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -938,7 +938,7 @@ static char *uuid_string(char *buf, char *end, const u8 *addr, * IPv4 uses dot-separated decimal with leading 0's (010.123.045.006) * - '[Ii]4[hnbl]' IPv4 addresses in host, network, big or little endian order * - 'I6c' for IPv6 addresses printed as specified by - * http://www.ietf.org/id/draft-kawamura-ipv6-text-representation-03.txt + * http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00 * - 'U' For a 16 byte UUID/GUID, it prints the UUID/GUID in the form * "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" * Options for %pU are: @@ -1224,7 +1224,7 @@ qualifier: * %pI6 print an IPv6 address with colons * %pi6 print an IPv6 address without colons * %pI6c print an IPv6 address as specified by - * http://www.ietf.org/id/draft-kawamura-ipv6-text-representation-03.txt + * http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00 * %pU[bBlL] print a UUID/GUID in big or little endian using lower or upper * case. * %n is ignored diff --git a/lib/zlib_inflate/inffast.c b/lib/zlib_inflate/inffast.c index 8550b0c05d00..215447c55261 100644 --- a/lib/zlib_inflate/inffast.c +++ b/lib/zlib_inflate/inffast.c @@ -8,6 +8,21 @@ #include "inflate.h" #include "inffast.h" +/* Only do the unaligned "Faster" variant when + * CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is set + * + * On powerpc, it won't be as we don't include autoconf.h + * automatically for the boot wrapper, which is intended as + * we run in an environment where we may not be able to deal + * with (even rare) alignment faults. In addition, we do not + * define __KERNEL__ for arch/powerpc/boot unlike x86 + */ + +#ifdef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS +#include <asm/unaligned.h> +#include <asm/byteorder.h> +#endif + #ifndef ASMINF /* Allow machine dependent optimization for post-increment or pre-increment. @@ -24,9 +39,11 @@ #ifdef POSTINC # define OFF 0 # define PUP(a) *(a)++ +# define UP_UNALIGNED(a) get_unaligned((a)++) #else # define OFF 1 # define PUP(a) *++(a) +# define UP_UNALIGNED(a) get_unaligned(++(a)) #endif /* @@ -239,18 +256,62 @@ void inflate_fast(z_streamp strm, unsigned start) } } else { +#ifdef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS + unsigned short *sout; + unsigned long loops; + + from = out - dist; /* copy direct from output */ + /* minimum length is three */ + /* Align out addr */ + if (!((long)(out - 1 + OFF) & 1)) { + PUP(out) = PUP(from); + len--; + } + sout = (unsigned short *)(out - OFF); + if (dist > 2) { + unsigned short *sfrom; + + sfrom = (unsigned short *)(from - OFF); + loops = len >> 1; + do + PUP(sout) = UP_UNALIGNED(sfrom); + while (--loops); + out = (unsigned char *)sout + OFF; + from = (unsigned char *)sfrom + OFF; + } else { /* dist == 1 or dist == 2 */ + unsigned short pat16; + + pat16 = *(sout-2+2*OFF); + if (dist == 1) +#if defined(__BIG_ENDIAN) + pat16 = (pat16 & 0xff) | ((pat16 & 0xff) << 8); +#elif defined(__LITTLE_ENDIAN) + pat16 = (pat16 & 0xff00) | ((pat16 & 0xff00) >> 8); +#else +#error __BIG_ENDIAN nor __LITTLE_ENDIAN is defined +#endif + loops = len >> 1; + do + PUP(sout) = pat16; + while (--loops); + out = (unsigned char *)sout + OFF; + } + if (len & 1) + PUP(out) = PUP(from); +#else /* CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS */ from = out - dist; /* copy direct from output */ do { /* minimum length is three */ - PUP(out) = PUP(from); - PUP(out) = PUP(from); - PUP(out) = PUP(from); - len -= 3; + PUP(out) = PUP(from); + PUP(out) = PUP(from); + PUP(out) = PUP(from); + len -= 3; } while (len > 2); if (len) { - PUP(out) = PUP(from); - if (len > 1) - PUP(out) = PUP(from); + PUP(out) = PUP(from); + if (len > 1) + PUP(out) = PUP(from); } +#endif /* !CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS */ } } else if ((op & 64) == 0) { /* 2nd level distance code */ |