X-Git-Url: https://glassweightruler.freedombox.rocks/gitweb/Ventoy.git/blobdiff_plain/3f65f0ef03e4aebcd14f233ca808a4f894657802..44fb9f456480f7d3feb0b35a32d08ae32a713883:/DMPATCH/dmpatch.c

diff --git a/DMPATCH/dmpatch.c b/DMPATCH/dmpatch.c
index e4ed6f9..f91648f 100644
--- a/DMPATCH/dmpatch.c
+++ b/DMPATCH/dmpatch.c
@@ -56,6 +56,8 @@ typedef struct ko_param
     unsigned long kv_minor;
     unsigned long blkdev_get_addr;
     unsigned long blkdev_put_addr;
+    unsigned long bdev_open_addr;
+    unsigned long kv_subminor;
     unsigned long padding[1];
 }ko_param;
 
@@ -157,6 +159,26 @@ static unsigned int g_claim_ptr = 0;
 static unsigned char *g_get_patch[MAX_PATCH] = { NULL };
 static unsigned char *g_put_patch[MAX_PATCH] = { NULL };
 
+static int notrace dmpatch_kv_above(unsigned long Major, unsigned long Minor, unsigned long SubMinor)
+{
+    if (g_ko_param.kv_major != Major)
+    {
+        return (g_ko_param.kv_major > Major) ? 1 : 0;
+    }
+
+    if (g_ko_param.kv_minor != Minor)
+    {
+        return (g_ko_param.kv_minor > Minor) ? 1 : 0;
+    }
+
+    if (g_ko_param.kv_subminor != SubMinor)
+    {
+        return (g_ko_param.kv_subminor > SubMinor) ? 1 : 0;
+    }
+
+    return 1;
+}
+
 static void notrace dmpatch_restore_code(int bytes, unsigned char *opCode, unsigned int code)
 {
     unsigned long align;
@@ -246,7 +268,7 @@ static int notrace dmpatch_replace_code
     return 0;
 }
 
-static unsigned long dmpatch_find_call_offset(unsigned long addr, unsigned long size, unsigned long func)
+static unsigned long notrace dmpatch_find_call_offset(unsigned long addr, unsigned long size, unsigned long func)
 {
     unsigned long i = 0;
     unsigned long dest;
@@ -275,18 +297,15 @@ static unsigned long dmpatch_find_call_offset(unsigned long addr, unsigned long
     return 0;
 }
 
-static unsigned int dmpatch_patch_claim_ptr(void)
+static unsigned int notrace dmpatch_patch_claim_ptr(void)
 {
     unsigned long i = 0;
     unsigned long t = 0;
-    unsigned long offset1;
-    unsigned long offset2;
-    unsigned long align;
+    unsigned long offset1 = 0;
+    unsigned long offset2 = 0;
+    unsigned long align = 0;
     unsigned char *opCode = NULL;
 
-    vdebug("Get addr: 0x%lx %lu 0x%lx\n", g_ko_param.sym_get_addr, g_ko_param.sym_get_size, g_ko_param.blkdev_get_addr);
-    vdebug("Put addr: 0x%lx %lu 0x%lx\n", g_ko_param.sym_put_addr, g_ko_param.sym_put_size, g_ko_param.blkdev_put_addr);
-
     opCode = (unsigned char *)g_ko_param.sym_get_addr;
     for (i = 0; i < 4; i++)
     {
@@ -297,13 +316,30 @@ static unsigned int dmpatch_patch_claim_ptr(void)
             opCode[i + 12], opCode[i + 13], opCode[i + 14], opCode[i + 15]);
     }
 
-    offset1 = dmpatch_find_call_offset(g_ko_param.sym_get_addr, g_ko_param.sym_get_size, g_ko_param.blkdev_get_addr);
-    offset2 = dmpatch_find_call_offset(g_ko_param.sym_put_addr, g_ko_param.sym_put_size, g_ko_param.blkdev_put_addr);
-    if (offset1 == 0 || offset2 == 0)
+    if (dmpatch_kv_above(6, 7, 0)) /* >= 6.7 kernel */
     {
-        vdebug("call blkdev_get or blkdev_put Not found, %lu %lu\n", offset1, offset2);
-        return 1;
+        vdebug("Get addr: 0x%lx %lu 0x%lx\n", g_ko_param.sym_get_addr, g_ko_param.sym_get_size, g_ko_param.bdev_open_addr);
+        offset1 = dmpatch_find_call_offset(g_ko_param.sym_get_addr, g_ko_param.sym_get_size, g_ko_param.bdev_open_addr);
+        if (offset1 == 0)
+        {
+            vdebug("call bdev_open_addr Not found\n");
+            return 1;
+        }
     }
+    else
+    {
+        vdebug("Get addr: 0x%lx %lu 0x%lx\n", g_ko_param.sym_get_addr, g_ko_param.sym_get_size, g_ko_param.blkdev_get_addr);
+        vdebug("Put addr: 0x%lx %lu 0x%lx\n", g_ko_param.sym_put_addr, g_ko_param.sym_put_size, g_ko_param.blkdev_put_addr);        
+
+        offset1 = dmpatch_find_call_offset(g_ko_param.sym_get_addr, g_ko_param.sym_get_size, g_ko_param.blkdev_get_addr);
+        offset2 = dmpatch_find_call_offset(g_ko_param.sym_put_addr, g_ko_param.sym_put_size, g_ko_param.blkdev_put_addr);
+        if (offset1 == 0 || offset2 == 0)
+        {
+            vdebug("call blkdev_get or blkdev_put Not found, %lu %lu\n", offset1, offset2);
+            return 1;
+        }
+    }
+    
     vdebug("call addr1:0x%lx  call addr2:0x%lx\n", 
         g_ko_param.sym_get_addr + offset1, 
         g_ko_param.sym_put_addr + offset2);
@@ -327,36 +363,41 @@ static unsigned int dmpatch_patch_claim_ptr(void)
         return 1;
     }
 
-    opCode = (unsigned char *)g_ko_param.sym_put_addr;
-    for (i = offset2 - 1, t = 0; (i > 0) && (t < 24); i--, t++)
-    {
-        /* rsi */
-        if (opCode[i] == 0x48 && opCode[i + 1] == 0xc7 && opCode[i + 2] == 0xc6)
-        {
-            if (*(unsigned int *)(opCode + i + 3) == g_claim_ptr)
-            {
-                vdebug("claim_ptr found at put addr 0x%lx\n", g_ko_param.sym_put_addr + i + 3);
-                g_put_patch[0] = opCode + i + 3;
-                break;                
-            }
-        }
-    }    
-
-    if (g_put_patch[0] == 0)
-    {
-        vdebug("Claim_ptr not found in put\n");
-        return 1;
-    }
-
+    
     align = (unsigned long)g_get_patch[0] / g_ko_param.pgsize * g_ko_param.pgsize;
     set_mem_rw(align, 1);
     *(unsigned int *)(g_get_patch[0]) = 0;
     set_mem_ro(align, 1);  
 
-    align = (unsigned long)g_put_patch[0] / g_ko_param.pgsize * g_ko_param.pgsize;
-    set_mem_rw(align, 1);
-    *(unsigned int *)(g_put_patch[0]) = 0;
-    set_mem_ro(align, 1);   
+
+    if (offset2 > 0)
+    {        
+        opCode = (unsigned char *)g_ko_param.sym_put_addr;
+        for (i = offset2 - 1, t = 0; (i > 0) && (t < 24); i--, t++)
+        {
+            /* rsi */
+            if (opCode[i] == 0x48 && opCode[i + 1] == 0xc7 && opCode[i + 2] == 0xc6)
+            {
+                if (*(unsigned int *)(opCode + i + 3) == g_claim_ptr)
+                {
+                    vdebug("claim_ptr found at put addr 0x%lx\n", g_ko_param.sym_put_addr + i + 3);
+                    g_put_patch[0] = opCode + i + 3;
+                    break;                
+                }
+            }
+        }    
+
+        if (g_put_patch[0] == 0)
+        {
+            vdebug("Claim_ptr not found in put\n");
+            return 1;
+        }
+        
+        align = (unsigned long)g_put_patch[0] / g_ko_param.pgsize * g_ko_param.pgsize;
+        set_mem_rw(align, 1);
+        *(unsigned int *)(g_put_patch[0]) = 0;
+        set_mem_ro(align, 1);   
+    }
 
     return 0;
 }
@@ -382,7 +423,7 @@ static __always_inline void dmpatch_wrmsr(unsigned int msr, u32 low, u32 high)
 		     : : "c" (msr), "a"(low), "d" (high) : "memory");
 }
 
-static u64 dmpatch_ibt_save(void)
+static u64 notrace dmpatch_ibt_save(void)
 {
     u64 msr = 0;
     u64 val = 0;
@@ -394,7 +435,7 @@ static u64 dmpatch_ibt_save(void)
     return msr;
 }
 
-static void dmpatch_ibt_restore(u64 save)
+static void notrace dmpatch_ibt_restore(u64 save)
 {
 	u64 msr;
 
@@ -406,8 +447,8 @@ static void dmpatch_ibt_restore(u64 save)
     dmpatch_wrmsr(MSR_IA32_S_CET, (u32)(msr & 0xffffffffULL), (u32)(msr >> 32));
 }
 #else
-static u64 dmpatch_ibt_save(void) { return 0; }
-static void dmpatch_ibt_restore(u64 save) { (void)save; }
+static u64 notrace dmpatch_ibt_save(void) { return 0; }
+static void notrace dmpatch_ibt_restore(u64 save) { (void)save; }
 #endif
 
 static int notrace dmpatch_init(void)
@@ -423,8 +464,8 @@ static int notrace dmpatch_init(void)
     
     kprintf = (printk_pf)(g_ko_param.printk_addr); 
 
-    vdebug("dmpatch_init start pagesize=%lu kernel=%lu.%lu ...\n", 
-        g_ko_param.pgsize, g_ko_param.kv_major, g_ko_param.kv_minor);
+    vdebug("dmpatch_init start pagesize=%lu kernel=%lu.%lu.%lu ...\n", 
+        g_ko_param.pgsize, g_ko_param.kv_major, g_ko_param.kv_minor, g_ko_param.kv_subminor);
     
     if (g_ko_param.struct_size != sizeof(ko_param))
     {
@@ -443,7 +484,7 @@ static int notrace dmpatch_init(void)
     reg_kprobe = (kprobe_reg_pf)g_ko_param.reg_kprobe_addr;
     unreg_kprobe = (kprobe_unreg_pf)g_ko_param.unreg_kprobe_addr;
 
-    if (g_ko_param.kv_major > 6 || (g_ko_param.kv_major == 6 && g_ko_param.kv_minor >= 5))
+    if (dmpatch_kv_above(6, 5, 0)) /* >= kernel 6.5 */
     {
         vdebug("new interface patch dm_get_table_device...\n");
         r = dmpatch_patch_claim_ptr();
@@ -466,25 +507,25 @@ static int notrace dmpatch_init(void)
 
     if (r)
     {
-        rc = -EINVAL;
+        rc = -EFAULT;
         goto out;
     }
     vdebug("patch dm_get_table_device success\n");
 
-    if (g_ko_param.kv_major >= 6 && g_ko_param.kv_minor >= 5)
+    if (dmpatch_kv_above(6, 5, 0))
     {
         r = 0;
     }
     else
     {
         r = dmpatch_replace_code(1, g_ko_param.sym_put_addr, g_ko_param.sym_put_size, 1, "dm_put_table_device", g_put_patch);        
+        if (r)
+        {
+            rc = -EFAULT;
+            goto out;
+        }
+        vdebug("patch dm_put_table_device success\n");
     }
-    if (r)
-    {
-        rc = -EINVAL;
-        goto out;
-    }
-    vdebug("patch dm_put_table_device success\n");
 
     vdebug("#####################################\n");
     vdebug("######## dm patch success ###########\n");
@@ -513,7 +554,10 @@ static void notrace dmpatch_exit(void)
     if (g_claim_ptr)
     {
         dmpatch_restore_code(4, g_get_patch[0], g_claim_ptr);
-        dmpatch_restore_code(4, g_put_patch[0], g_claim_ptr);
+        if (g_put_patch[0])
+        {
+            dmpatch_restore_code(4, g_put_patch[0], g_claim_ptr);
+        }
     }
     else
     {