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

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

5 files changed, 22 insertions, 3 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 127c86f795d0..8f93e066bf8b 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -325,6 +325,7 @@ struct btrfs_fs_info {
         u64 last_trans_committed;
         unsigned long mount_opt;
         u64 max_extent;
+        u64 max_inline;
         u64 alloc_start;
         struct btrfs_transaction *running_transaction;
         struct btrfs_super_block super_copy;
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index e29a0716f6a9..6647b90ef745 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -659,6 +659,7 @@ struct btrfs_root *open_ctree(struct super_block *sb)
         fs_info->throttles = 0;
         fs_info->mount_opt = 0;
         fs_info->max_extent = (u64)-1;
+        fs_info->max_inline = 8192 * 1024;
         fs_info->delalloc_bytes = 0;
         fs_info->btree_inode = new_inode(sb);
         fs_info->btree_inode->i_ino = 1;
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index e81b35b06187..6999b819db62 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2451,7 +2451,6 @@ sector_t extent_bmap(struct address_space *mapping, sector_t iblock,
                 goto out;
 
         sector = (em->block_start + start - em->start) >> inode->i_blkbits;
-printk("bmap finds %Lu %Lu block %Lu\n", em->start, em->len, em->block_start);
 out:
         free_extent_map(em);
         return sector;
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 8e210616d702..7c10a90362ff 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -301,7 +301,8 @@ static int noinline dirty_and_release_pages(struct btrfs_trans_handle *trans,
          */
         inline_size = end_pos;
         if (isize >= BTRFS_MAX_INLINE_DATA_SIZE(root) ||
-            inline_size > 8192 ||
+            inline_size > root->fs_info->max_inline ||
+            (inline_size & (root->sectorsize -1)) == 0 ||
             inline_size >= BTRFS_MAX_INLINE_DATA_SIZE(root)) {
                 u64 last_end;
                 u64 existing_delalloc = 0;
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]);