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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2008-11-01 14:57:49 +0200
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2008-12-03 13:14:05 +0200
commit553dea4dd531562688ba01c641c7f8fc7abaaf8c (patch)
tree823d2cb0b8684e7975ca3193a9fec2a53e3995b1 /fs/ubifs/ubifs.h
parenta1dc080c27ec8ea7ca1c8a9b499362a71ebff792 (diff)
downloadlwn-553dea4dd531562688ba01c641c7f8fc7abaaf8c.tar.gz
lwn-553dea4dd531562688ba01c641c7f8fc7abaaf8c.zip
UBIFS: introduce compression mount options
It is very handy to be able to change default UBIFS compressor via mount options. Introduce -o compr=<name> mount option support. Currently only "none", "lzo" and "zlib" compressors are supported. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'fs/ubifs/ubifs.h')
-rw-r--r--fs/ubifs/ubifs.h12
1 files changed, 10 insertions, 2 deletions
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index 4d76aba57ee1..16840e099eff 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -893,13 +893,21 @@ struct ubifs_orphan {
/**
* struct ubifs_mount_opts - UBIFS-specific mount options information.
* @unmount_mode: selected unmount mode (%0 default, %1 normal, %2 fast)
- * @bulk_read: enable bulk-reads
- * @chk_data_crc: check CRCs when reading data nodes
+ * @bulk_read: enable/disable bulk-reads (%0 default, %1 disabe, %2 enable)
+ * @chk_data_crc: enable/disable CRC data checking when reading data nodes
+ * (%0 default, %1 disabe, %2 enable)
+ * @override_compr: override default compressor (%0 - do not override and use
+ * superblock compressor, %1 - override and use compressor
+ * specified in @compr_type)
+ * @compr_type: compressor type to override the superblock compressor with
+ * (%UBIFS_COMPR_NONE, etc)
*/
struct ubifs_mount_opts {
unsigned int unmount_mode:2;
unsigned int bulk_read:2;
unsigned int chk_data_crc:2;
+ unsigned int override_compr:1;
+ unsigned int compr_type:2;
};
/**