1 files changed, 18 insertions, 4 deletions

diff --git a/fs/exofs/common.h b/fs/exofs/common.h
index f0d520312d8b..3bbd46956d77 100644
--- a/fs/exofs/common.h
+++ b/fs/exofs/common.h
@@ -53,10 +53,14 @@
 #define EXOFS_ROOT_ID   0x10002 /* object ID for root directory */
 
 /* exofs Application specific page/attribute */
+/* Inode attrs */
 # define EXOFS_APAGE_FS_DATA    (OSD_APAGE_APP_DEFINED_FIRST + 3)
 # define EXOFS_ATTR_INODE_DATA  1
 # define EXOFS_ATTR_INODE_FILE_LAYOUT   2
 # define EXOFS_ATTR_INODE_DIR_LAYOUT    3
+/* Partition attrs */
+# define EXOFS_APAGE_SB_DATA    (0xF0000000U + 3)
+# define EXOFS_ATTR_SB_STATS    1
 
 /*
  * The maximum number of files we can have is limited by the size of the
@@ -86,8 +90,8 @@ enum {
  */
 enum {EXOFS_FSCB_VER = 1, EXOFS_DT_VER = 1};
 struct exofs_fscb {
-        __le64  s_nextid;       /* Highest object ID used */
-        __le64  s_numfiles;     /* Number of files on fs */
+        __le64  s_nextid;       /* Only used after mkfs */
+        __le64  s_numfiles;     /* Only used after mkfs */
         __le32  s_version;      /* == EXOFS_FSCB_VER */
         __le16  s_magic;        /* Magic signature */
         __le16  s_newfs;        /* Non-zero if this is a new fs */
@@ -98,10 +102,20 @@ struct exofs_fscb {
 } __packed;
 
 /*
+ * This struct is set on the FS partition's attributes.
+ * [EXOFS_APAGE_SB_DATA, EXOFS_ATTR_SB_STATS] and is written together
+ * with the create command, to atomically persist the sb writeable information.
+ */
+struct exofs_sb_stats {
+        __le64  s_nextid;       /* Highest object ID used */
+        __le64  s_numfiles;     /* Number of files on fs */
+} __packed;
+
+/*
  * Describes the raid used in the FS. It is part of the device table.
  * This here is taken from the pNFS-objects definition. In exofs we
  * use one raid policy through-out the filesystem. (NOTE: the funny
- * alignment at begining. We take care of it at exofs_device_table.
+ * alignment at beginning. We take care of it at exofs_device_table.
  */
 struct exofs_dt_data_map {
         __le32  cb_num_comps;
@@ -122,7 +136,7 @@ struct exofs_dt_device_info {
         u8      systemid[OSD_SYSTEMID_LEN];
         __le64  long_name_offset;       /* If !0 then offset-in-file */
         __le32  osdname_len;            /* */
-        u8      osdname[44];            /* Embbeded, Ususally an asci uuid */
+        u8      osdname[44];            /* Embbeded, Usually an asci uuid */
 } __packed;
 
 /*