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Date: Sat, 02 Feb 2008 01:56:07 -0700
From: Andreas Dilger <adilger@....com>
To: "Theodore Ts'o" <tytso@....edu>, linux-ext4@...r.kernel.org
Subject: Re: [PATCH][27/28] e2fsprogs-debugfs-supported_features.patch
Print out the currently supported features of e2fsprogs/libext2fs
via a new "debugfs supported_features" command.
Signed-off-by: Kalpak Shah <kalpak@...sterfs.com>
Signed-off-by: Andreas Dilger <adilger@...sterfs.com>
Index: e2fsprogs-1.40.2/debugfs/debug_cmds.ct
===================================================================
--- e2fsprogs-1.40.2.orig/debugfs/debug_cmds.ct
+++ e2fsprogs-1.40.2/debugfs/debug_cmds.ct
@@ -154,5 +154,8 @@ request do_dump_unused, "Dump unused blo
request do_set_current_time, "Set current time to use when setting filesystme fields",
set_current_time;
+request do_supported_features, "Print features supported by this version of e2fsprogs",
+ supported_features;
+
end;
Index: e2fsprogs-1.40.2/debugfs/debugfs.c
===================================================================
--- e2fsprogs-1.40.2.orig/debugfs/debugfs.c
+++ e2fsprogs-1.40.2/debugfs/debugfs.c
@@ -1772,6 +1772,44 @@ void do_set_current_time(int argc, char
}
}
+void do_supported_features(int argc, char *argv[])
+{
+ FILE *out = stdout;
+ int i, j, ret;
+ __u32 supp[3] = { EXT2_LIB_FEATURE_COMPAT_SUPP,
+ EXT2_LIB_FEATURE_INCOMPAT_SUPP,
+ EXT2_LIB_FEATURE_RO_COMPAT_SUPP };
+ __u32 m;
+ int compat;
+ unsigned int feature_flag;
+
+ if (argc >= 1) {
+ ret = e2p_string2feature(argv[1], &compat, &feature_flag);
+ if (ret)
+ goto err;
+
+ if (!(supp[compat] & feature_flag))
+ goto err;
+
+ fprintf(out, "Supported feature: %s\n", argv[1]);
+ } else {
+ fprintf(out, "Supported features:");
+ for (i = 0; i < 3; i++) {
+ for (j = 0, m = 1; j < 32; j++, m <<= 1) {
+ if (supp[i] & m)
+ fprintf(out, " %s",
+ e2p_feature2string(i, m));
+ }
+ }
+ fprintf(out, "\n");
+ }
+
+ return;
+
+err:
+ com_err(argv[0], 0, "Unknown feature: %s\n", argv[1]);
+}
+
static int source_file(const char *cmd_file, int sci_idx)
{
FILE *f;
Index: e2fsprogs-1.40.2/lib/ext2fs/ext2_fs.h
===================================================================
--- e2fsprogs-1.40.2.orig/lib/ext2fs/ext2_fs.h
+++ e2fsprogs-1.40.2/lib/ext2fs/ext2_fs.h
@@ -656,8 +656,7 @@ struct ext2_super_block {
#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
EXT4_FEATURE_RO_COMPAT_DIR_NLINK| \
- EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE| \
- EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
+ EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)
/*
* Default values for user and/or group using reserved blocks
Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.
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