[PATCH e2fsprogs 2/9] e2fsprogs: Reserve feature bit and SB field bit for filename encoding
From: Gabriel Krisman Bertazi <hidden>
Date: 2018-10-16 04:59:30
Subsystem:
library code, the rest · Maintainers:
Andrew Morton, Linus Torvalds
The s_encoding field in the superblock stores a magic number indicating the encoding format and version used globally by file and directory names in the filesystem. The s_encoding_flags defines policies for using the charset encoding, like how to handle invalid sequences and what kind of normalization to use. A feature flag is also allocated to indicate whether this filesystem has encoding awareness enabled. Signed-off-by: Gabriel Krisman Bertazi <redacted> --- lib/e2p/feature.c | 2 ++ lib/ext2fs/ext2_fs.h | 6 +++++- lib/ext2fs/ext2fs.h | 1 + 3 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/lib/e2p/feature.c b/lib/e2p/feature.c
index e3b0dab83c81..294a56a40b52 100644
--- a/lib/e2p/feature.c
+++ b/lib/e2p/feature.c@@ -109,6 +109,8 @@ static struct feature feature_list[] = { "inline_data"}, { E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_ENCRYPT, "encrypt"}, + { E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FNAME_ENCODING, + "encoding"}, { 0, 0, 0 }, };
diff --git a/lib/ext2fs/ext2_fs.h b/lib/ext2fs/ext2_fs.h
index ab2595486d21..f1c405b76339 100644
--- a/lib/ext2fs/ext2_fs.h
+++ b/lib/ext2fs/ext2_fs.h@@ -755,7 +755,9 @@ struct ext2_super_block { __u8 s_first_error_time_hi; __u8 s_last_error_time_hi; __u8 s_pad[2]; - __le32 s_reserved[96]; /* Padding to the end of the block */ +/*27c*/ __le16 s_encoding; /* Filename charset encoding */ + __le16 s_encoding_flags; /* Filename charset encoding flags */ + __le32 s_reserved[95]; /* Padding to the end of the block */ /*3fc*/ __u32 s_checksum; /* crc32c(superblock) */ };
@@ -846,6 +848,7 @@ struct ext2_super_block { #define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */ #define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */ #define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000 +#define EXT4_FEATURE_INCOMPAT_FNAME_ENCODING 0x20000 #define EXT4_FEATURE_COMPAT_FUNCS(name, ver, flagname) \ static inline int ext2fs_has_feature_##name(struct ext2_super_block *sb) \
@@ -939,6 +942,7 @@ EXT4_FEATURE_INCOMPAT_FUNCS(csum_seed, 4, CSUM_SEED) EXT4_FEATURE_INCOMPAT_FUNCS(largedir, 4, LARGEDIR) EXT4_FEATURE_INCOMPAT_FUNCS(inline_data, 4, INLINE_DATA) EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, 4, ENCRYPT) +EXT4_FEATURE_INCOMPAT_FUNCS(fname_encoding, 4, FNAME_ENCODING) #define EXT2_FEATURE_COMPAT_SUPP 0 #define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE| \
diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
index 185be5df511f..64c5b8758a40 100644
--- a/lib/ext2fs/ext2fs.h
+++ b/lib/ext2fs/ext2fs.h@@ -616,6 +616,7 @@ typedef struct ext2_icount *ext2_icount_t; EXT4_FEATURE_INCOMPAT_64BIT|\ EXT4_FEATURE_INCOMPAT_INLINE_DATA|\ EXT4_FEATURE_INCOMPAT_ENCRYPT|\ + EXT4_FEATURE_INCOMPAT_FNAME_ENCODING|\ EXT4_FEATURE_INCOMPAT_CSUM_SEED|\ EXT4_FEATURE_INCOMPAT_LARGEDIR)
--
2.19.1