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

[deliverable/linux.git] / fs / btrfs / super.c

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index f8a1016600b182ae31814dba3852fb35885ab69c..a46300c4753a82ac1ad393b33bad1435381d86f1 100644 (file)
--- 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]);