From: Theodore Ts'o <tytso@mit.edu>
Date: Wed, 27 Feb 2008 20:01:19 +0000 (-0500)
Subject: Add support for manipulating large_file feature in mke2fs and tune2fs
X-Git-Tag: v1.40.7~13
X-Git-Url: https://git.whamcloud.com/gitweb?a=commitdiff_plain;h=558df54458075856b3a76051648323643a56dadc;p=tools%2Fe2fsprogs.git

Add support for manipulating large_file feature in mke2fs and tune2fs

Previously we just let the kernel and e2fsck do this automatically,
but e2fsck will no longer automatically clear the large_file feature.
It still isn't really necessary to worry about this feature flag
explicitly, but some users seem to care.

Addresses-Red-Hat-Bugzilla: #258381

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---

diff --git a/misc/mke2fs.8.in b/misc/mke2fs.8.in
index 65c42bf..6b394a5 100644
--- a/misc/mke2fs.8.in
+++ b/misc/mke2fs.8.in
@@ -415,6 +415,10 @@ prefix the feature name with a  caret ('^') character.  The
 pseudo-filesystem feature "none" will clear all filesystem features.
 .RS 1.2i
 .TP
+.B large_file
+Filesystem can contain files that are greater than 2GB.  (Modern kernels
+set this feature automatically when a file > 2GB is created.)
+.TP
 .B dir_index
 Use hashed b-trees to speed up lookups in large directories.
 .TP
diff --git a/misc/mke2fs.c b/misc/mke2fs.c
index cfc8116..e16c5f0 100644
--- a/misc/mke2fs.c
+++ b/misc/mke2fs.c
@@ -897,15 +897,19 @@ static void parse_extended_opts(struct ext2_super_block *param,
 }	
 
 static __u32 ok_features[3] = {
+	/* Compat */
 	EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 		EXT2_FEATURE_COMPAT_RESIZE_INODE |
 		EXT2_FEATURE_COMPAT_DIR_INDEX |
 		EXT2_FEATURE_COMPAT_LAZY_BG |
-		EXT2_FEATURE_COMPAT_EXT_ATTR,	/* Compat */
-	EXT2_FEATURE_INCOMPAT_FILETYPE|		/* Incompat */
+		EXT2_FEATURE_COMPAT_EXT_ATTR,
+	/* Incompat */
+	EXT2_FEATURE_INCOMPAT_FILETYPE|
 		EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|
 		EXT2_FEATURE_INCOMPAT_META_BG,
-	EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER	/* R/O compat */
+	/* R/O compat */
+	EXT2_FEATURE_RO_COMPAT_LARGE_FILE|
+		EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER
 };
 
 
diff --git a/misc/tune2fs.8.in b/misc/tune2fs.8.in
index 2a8c42b..b37e99d 100644
--- a/misc/tune2fs.8.in
+++ b/misc/tune2fs.8.in
@@ -415,6 +415,10 @@ The following filesystem features can be set or cleared using
 .BR tune2fs :
 .RS 1.2i
 .TP
+.B large_file
+Filesystem can contain files that are greater than 2GB.  (Modern kernels
+set this feature automatically when a file > 2GB is created.)
+.TP
 .B dir_index
 Use hashed b-trees to speed up lookups in large directories.
 .TP
diff --git a/misc/tune2fs.c b/misc/tune2fs.c
index 4529e24..184b5d6 100644
--- a/misc/tune2fs.c
+++ b/misc/tune2fs.c
@@ -108,18 +108,26 @@ static void usage(void)
 }
 
 static __u32 ok_features[3] = {
+	/* Compat */
 	EXT3_FEATURE_COMPAT_HAS_JOURNAL |
-		EXT2_FEATURE_COMPAT_DIR_INDEX,	/* Compat */
-	EXT2_FEATURE_INCOMPAT_FILETYPE,		/* Incompat */
-	EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER	/* R/O compat */
+		EXT2_FEATURE_COMPAT_DIR_INDEX,
+	/* Incompat */
+	EXT2_FEATURE_INCOMPAT_FILETYPE,
+	/* R/O compat */
+	EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
+		EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER
 };
 
 static __u32 clear_ok_features[3] = {
+	/* Compat */
 	EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 		EXT2_FEATURE_COMPAT_RESIZE_INODE |
-		EXT2_FEATURE_COMPAT_DIR_INDEX,	/* Compat */
-	EXT2_FEATURE_INCOMPAT_FILETYPE,		/* Incompat */
-	EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER	/* R/O compat */
+		EXT2_FEATURE_COMPAT_DIR_INDEX,
+	/* Incompat */
+	EXT2_FEATURE_INCOMPAT_FILETYPE,
+	/* R/O compat */
+	EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
+		EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER
 };
 
 /*
@@ -392,7 +400,9 @@ static void update_feature_set(ext2_filsys fs, char *features)
 	    FEATURE_CHANGED(E2P_FEATURE_INCOMPAT,
 			    EXT2_FEATURE_INCOMPAT_FILETYPE) ||
 	    FEATURE_CHANGED(E2P_FEATURE_COMPAT,
-			    EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
+			    EXT2_FEATURE_COMPAT_RESIZE_INODE) ||
+	    FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
+			EXT2_FEATURE_RO_COMPAT_LARGE_FILE)) {
 		sb->s_state &= ~EXT2_VALID_FS;
 		printf("\n%s\n", _(please_fsck));
 	}