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ext2: Ignore INCOMPAT_MMP.

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It's not really incompatible as long as driver never writes to FS.
This commit is contained in:
Vladimir Serbinenko 2015-02-16 21:08:37 +01:00
parent e20aa39ea4
commit 5537a586e0
1 changed files with 8 additions and 2 deletions
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10
grub-core/fs/ext2.c
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@ -100,6 +100,7 @@ GRUB_MOD_LICENSE ("GPLv3+");
#define EXT2_FEATURE_INCOMPAT_META_BG 0x0010
#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* Extents used */
#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
#define EXT4_FEATURE_INCOMPAT_MMP 0x0100
#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
/* The set of back-incompatible features this driver DOES support. Add (OR)
@ -115,8 +116,13 @@ GRUB_MOD_LICENSE ("GPLv3+");
* journal because they will ignore the journal, but the next
* ext3 driver to mount the volume will find the journal and
* replay it, potentially corrupting the metadata written by
* the ext2 drivers. Safe to ignore for this RO driver. */
#define EXT2_DRIVER_IGNORED_INCOMPAT ( EXT3_FEATURE_INCOMPAT_RECOVER )
* the ext2 drivers. Safe to ignore for this RO driver.
* mmp: Not really back-incompatible - was added as such to
* avoid multiple read-write mounts. Safe to ignore for this
* RO driver.
*/
#define EXT2_DRIVER_IGNORED_INCOMPAT ( EXT3_FEATURE_INCOMPAT_RECOVER \
| EXT4_FEATURE_INCOMPAT_MMP)
#define EXT3_JOURNAL_MAGIC_NUMBER 0xc03b3998U