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2009-02-08 Robert Millan <rmh@aybabtu.com>

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Patch from Javier Martín.
        * fs/ext2.c (EXT2_DRIVER_SUPPORTED_INCOMPAT): Add
        `EXT4_FEATURE_INCOMPAT_FLEX_BG'.
This commit is contained in:
robertmh 2009-02-08 00:28:09 +00:00
parent f821ce593a
commit 73a4ce818c
2 changed files with 13 additions and 7 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2009-02-08 Robert Millan <rmh@aybabtu.com>
Patch from Javier Martín.
* fs/ext2.c (EXT2_DRIVER_SUPPORTED_INCOMPAT): Add
`EXT4_FEATURE_INCOMPAT_FLEX_BG'.
2009-02-08 Robert Millan <rmh@aybabtu.com>
* fs/cpio.c: Split tar functionality to ...

14
fs/ext2.c
View file

@ -73,7 +73,7 @@
/* Superblock filesystem feature flags (RW compatible)
* A filesystem with any of these enabled can be read and written by a driver
* that does not understand them without causing metadata/data corruption */
* that does not understand them without causing metadata/data corruption. */
#define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001
#define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002
#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
@ -83,7 +83,7 @@
/* Superblock filesystem feature flags (RO compatible)
* A filesystem with any of these enabled can be safely read by a driver that
* does not understand them, but should not be written to, usually because
* additional metadata is required */
* additional metadata is required. */
#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
#define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
@ -93,7 +93,7 @@
/* Superblock filesystem feature flags (back-incompatible)
* A filesystem with any of these enabled should not be attempted to be read
* by a driver that does not understand them, since they usually indicate
* metadata format changes that might confuse the reader. */
* metadata format changes that might confuse the reader. */
#define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
#define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
@ -104,17 +104,17 @@
#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
/* The set of back-incompatible features this driver DOES support. Add (OR)
* flags here as the related features are implemented into the driver */
* flags here as the related features are implemented into the driver. */
#define EXT2_DRIVER_SUPPORTED_INCOMPAT ( EXT2_FEATURE_INCOMPAT_FILETYPE \
| EXT4_FEATURE_INCOMPAT_EXTENTS )
| EXT4_FEATURE_INCOMPAT_EXTENTS \
| EXT4_FEATURE_INCOMPAT_FLEX_BG )
/* List of rationales for the ignored "incompatible" features:
* needs_recovery: Not really back-incompatible - was added as such to forbid
* ext2 drivers from mounting an ext3 volume with a dirty
* 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
*/
* the ext2 drivers. Safe to ignore for this RO driver. */
#define EXT2_DRIVER_IGNORED_INCOMPAT ( EXT3_FEATURE_INCOMPAT_RECOVER )