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ext2: check volume state when mounting

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we deny mounting read/write when not clean or with errors.

Change-Id: Ie0188319618d9d8e7199b308c007fbaeacaed87c
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5400
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>
This commit is contained in:
Jérôme Duval 2022-06-25 09:49:00 +02:00
parent 732f5f0f87
commit caf0369a89
2 changed files with 13 additions and 3 deletions
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10
src/add-ons/kernel/file_systems/ext2/Volume.cpp
View File

@ -168,6 +168,16 @@ Volume::Mount(const char* deviceName, uint32 flags)
if (!_VerifySuperBlock())
return B_ERROR;
if ((fSuperBlock.State() & EXT2_FS_STATE_VALID) == 0
|| (fSuperBlock.State() & EXT2_FS_STATE_ERROR) != 0) {
if (!IsReadOnly()) {
FATAL("Volume::Mount(): can't mount R/W, volume not clean\n");
return B_NOT_ALLOWED;
} else {
FATAL("Volume::Mount(): warning: volume not clean\n");
}
}
// initialize short hands to the superblock (to save byte swapping)
fBlockShift = fSuperBlock.BlockShift();
if (fBlockShift < 10 || fBlockShift > 16)

6
src/add-ons/kernel/file_systems/ext2/ext2.h
View File

@ -171,9 +171,9 @@ struct ext2_super_block {
#define EXT2_MAX_REVISION EXT2_DYNAMIC_REVISION
#define EXT2_FS_STATE_VALID 1 // File system was cleanly unmounted
#define EXT2_FS_STATE_ERROR 2 // File system has errors
#define EXT2_FS_STATE_ORPHAN 3 // Orphans are being recovered
#define EXT2_FS_STATE_VALID 0x1 // File system was cleanly unmounted
#define EXT2_FS_STATE_ERROR 0x2 // File system has errors
#define EXT2_FS_STATE_ORPHAN 0x4 // Orphans are being recovered
// compatible features
#define EXT2_FEATURE_DIRECTORY_PREALLOCATION 0x0001