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[RFC,1/2] Btrfs: add noi_version option to disable MS_I_VERSION

Message ID 1433851471-11543-1-git-send-email-bo.li.liu@oracle.com (mailing list archive)
State New, archived
Headers show

Commit Message

Liu Bo June 9, 2015, 12:04 p.m. UTC 
MS_I_VERSION is enabled by default for btrfs, this adds an alternative
option to toggle it off.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
---
 fs/btrfs/super.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
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Patch

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index f2c9f9d..c81a3f1 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -324,7 +324,7 @@  enum {
 	Opt_check_integrity_print_mask, Opt_fatal_errors, Opt_rescan_uuid_tree,
 	Opt_commit_interval, Opt_barrier, Opt_nodefrag, Opt_nodiscard,
 	Opt_noenospc_debug, Opt_noflushoncommit, Opt_acl, Opt_datacow,
-	Opt_datasum, Opt_treelog, Opt_noinode_cache,
+	Opt_datasum, Opt_treelog, Opt_noinode_cache, Opt_noi_version,
 	Opt_err,
 };
 
@@ -351,6 +351,7 @@  static match_table_t tokens = {
 	{Opt_nossd, "nossd"},
 	{Opt_acl, "acl"},
 	{Opt_noacl, "noacl"},
+	{Opt_noi_version, "noi_version"},
 	{Opt_notreelog, "notreelog"},
 	{Opt_treelog, "treelog"},
 	{Opt_flushoncommit, "flushoncommit"},
@@ -593,6 +594,10 @@  int btrfs_parse_options(struct btrfs_root *root, char *options)
 		case Opt_noacl:
 			root->fs_info->sb->s_flags &= ~MS_POSIXACL;
 			break;
+		case Opt_noi_version:
+			root->fs_info->sb->s_flags &= ~MS_I_VERSION;
+			btrfs_info(root->fs_info, "disable i_version");
+			break;
 		case Opt_notreelog:
 			btrfs_set_and_info(root, NOTREELOG,
 					   "disabling tree log");