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Fix the issue that VTOY_LINUX_REMOUNT=1 does not work on some distros (e.g. Pop OS/openSUSE/Ubuntu 23.04) (#2475 #2551)

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longpanda
2023-10-06 21:12:34 +08:00
parent d617985093
commit 7f63a1c327
12 changed files with 152 additions and 25 deletions
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41
DMPATCH/dmpatch.c
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@@ -78,15 +78,25 @@ static volatile ko_param g_ko_param =
#define PATCH_OP_POS2 1
#define CODE_MATCH2(code, i) \
(code[i] == 0x0C && code[i + 1] == 0x80 && code[i + 2] == 0x89 && code[i + 3] == 0xC6)
#define PATCH_OP_POS3 4
#define CODE_MATCH3(code, i) \
(code[i] == 0x44 && code[i + 1] == 0x89 && code[i + 2] == 0xe8 && code[i + 3] == 0x0c && code[i + 4] == 0x80)
#elif defined(CONFIG_X86_32)
#define PATCH_OP_POS1 2
#define CODE_MATCH1(code, i) \
(code[i] == 0x80 && code[i + 1] == 0xca && code[i + 2] == 0x80 && code[i + 3] == 0xe8)
#define PATCH_OP_POS2 2
#define CODE_MATCH2(code, i) \
(code[i] == 0x80 && code[i + 1] == 0xca && code[i + 2] == 0x80 && code[i + 3] == 0xe8)
#define PATCH_OP_POS2 PATCH_OP_POS1
#define CODE_MATCH2 CODE_MATCH1
#define PATCH_OP_POS3 PATCH_OP_POS1
#define CODE_MATCH3 CODE_MATCH1
#else
#error "unsupported arch"
@@ -173,7 +183,7 @@ static int notrace dmpatch_replace_code
vdebug("patch for %s style[%d] 0x%lx %d\n", desc, style, addr, (int)size);
for (i = 0; i < (int)size - 4; i++)
for (i = 0; i < (int)size - 8; i++)
{
if (style == 1)
{
@@ -183,7 +193,7 @@ static int notrace dmpatch_replace_code
cnt++;
}
}
else
else if (style == 2)
{
if (CODE_MATCH2(opCode, i) && cnt < MAX_PATCH)
{
@@ -191,8 +201,20 @@ static int notrace dmpatch_replace_code
cnt++;
}
}
else if (style == 3)
{
if (CODE_MATCH3(opCode, i) && cnt < MAX_PATCH)
{
patch[cnt] = opCode + i + PATCH_OP_POS3;
cnt++;
}
}
}
if (cnt != expect || cnt >= MAX_PATCH)
{
vdebug("patch error: cnt=%d expect=%d\n", cnt, expect);
@@ -297,9 +319,16 @@ static int notrace dmpatch_init(void)
r = dmpatch_replace_code(1, g_ko_param.sym_get_addr, g_ko_param.sym_get_size, 2, "dm_get_table_device", g_get_patch);
if (r && g_ko_param.kv_major >= 5)
{
vdebug("new patch dm_get_table_device...\n");
vdebug("new2 patch dm_get_table_device...\n");
r = dmpatch_replace_code(2, g_ko_param.sym_get_addr, g_ko_param.sym_get_size, 1, "dm_get_table_device", g_get_patch);
}
if (r && g_ko_param.kv_major >= 5)
{
vdebug("new3 patch dm_get_table_device...\n");
r = dmpatch_replace_code(3, g_ko_param.sym_get_addr, g_ko_param.sym_get_size, 1, "dm_get_table_device", g_get_patch);
}
if (r)
{