Initial remote commit

2026-04-30 11:04:05 +00:00
commit b86e4f9a98
103 changed files with 262770 additions and 0 deletions
--- a/misc_tools/inode2_check.py
+++ b/misc_tools/inode2_check.py
@@ -0,0 +1,48 @@
+import struct
+
+CHUNK    = 128*512
+LV_START = 5120000*512
+BSIZE    = 4096
+IPG      = 8192
+INODE_SZ = 256
+
+def read_inode(inode_num):
+    group    = (inode_num-1)//IPG
+    idx      = (inode_num-1)%IPG
+    it_block = 1070 + group*512
+    it_virt  = it_block*BSIZE + idx*INODE_SZ
+
+    grp      = it_virt//(5*CHUNK)
+    in_group = it_virt%(5*CHUNK)
+    chunk_idx= in_group//CHUNK
+    intra    = in_group%CHUNK
+
+    if chunk_idx == 4:
+        return None, 'METADATA CHUNK'
+
+    phys = LV_START + grp*4*CHUNK + chunk_idx*CHUNK + intra
+    with open('/dev/sda','rb') as f:
+        f.seek(phys)
+        return f.read(INODE_SZ), 'OK'
+
+def parse_inode(data):
+    mode  = struct.unpack_from('<H', data,  0)[0]
+    size  = struct.unpack_from('<I', data,  4)[0]
+    mtime = struct.unpack_from('<I', data, 16)[0]
+    links = struct.unpack_from('<H', data, 26)[0]
+    flags = struct.unpack_from('<I', data, 32)[0]
+    ext_magic = struct.unpack_from('<H', data, 40)[0]
+    return mode, size, mtime, links, flags, ext_magic
+
+# Check root inode and nearby system inodes
+for ino in [2, 3, 4, 5, 6, 7, 8, 11, 12]:
+    data, status = read_inode(ino)
+    if data is None:
+        print(f'Inode {ino:4d}: {status}')
+        continue
+    mode, size, mtime, links, flags, ext_magic = parse_inode(data)
+    ftype = {0x4000:'dir', 0x8000:'file', 0xa000:'link'}.get(mode&0xf000,'?')
+    print(f'Inode {ino:4d}: type={ftype} mode=0x{mode:04x} '
+          f'size={size} links={links} '
+          f'extent_magic=0x{ext_magic:04x} '
+          f'mtime={mtime} [{status}]')