Btrfs: mount -o max_inline=size to control the maximum inline extent size

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 18 insertions, 1 deletions

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index f8a1016600b1..a46300c4753a 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -64,7 +64,7 @@ static void btrfs_put_super (struct super_block * sb)
 
 enum {
         Opt_subvol, Opt_nodatasum, Opt_nodatacow, Opt_max_extent,
-        Opt_alloc_start, Opt_nobarrier, Opt_ssd, Opt_err,
+        Opt_max_inline, Opt_alloc_start, Opt_nobarrier, Opt_ssd, Opt_err,
 };
 
 static match_table_t tokens = {
@@ -73,6 +73,7 @@ static match_table_t tokens = {
         {Opt_nodatacow, "nodatacow"},
         {Opt_nobarrier, "nobarrier"},
         {Opt_max_extent, "max_extent=%s"},
+        {Opt_max_inline, "max_inline=%s"},
         {Opt_alloc_start, "alloc_start=%s"},
         {Opt_ssd, "ssd"},
         {Opt_err, NULL}
@@ -178,6 +179,22 @@ static int parse_options (char * options,
                                 }
                         }
                         break;
+                case Opt_max_inline:
+                        if (info) {
+                                char *num = match_strdup(&args[0]);
+                                if (num) {
+                                        info->max_inline =
+                                                btrfs_parse_size(num);
+                                        kfree(num);
+
+                                        info->max_inline = max_t(u64,
+                                                         info->max_inline,
+                                                         root->sectorsize);
+                                        printk("btrfs: max_inline at %Lu\n",
+                                               info->max_inline);
+                                }
+                        }
+                        break;
                 case Opt_alloc_start:
                         if (info) {
                                 char *num = match_strdup(&args[0]);