Need to use the flavtgt instead of flavor. flavtgt == "" when flavor == up.

[fs/lustre-release.git] / lustre / include / linux / lustre_snap.h

diff --git a/lustre/include/linux/lustre_snap.h b/lustre/include/linux/lustre_snap.h
index cd8e9c6..bc50126 100644 (file)
--- a/lustre/include/linux/lustre_snap.h
+++ b/lustre/include/linux/lustre_snap.h
@@ -112,39 +112,19 @@ struct snap_ea{
                 (v & 0xFF)
                                                                                                                                                                                                      
                                                                                                                                                                                                      
-#define EXT3_EA_TRANS_BLOCKS            EXT3_DATA_TRANS_BLOCKS
-#define EXT3_SETMETA_TRANS_BLOCKS       EXT3_DATA_TRANS_BLOCKS
-#define EXT3_NEWINODE_TRANS_BLOCKS      10
-#define SNAP_INSERTLIST_TRANS_BLOCKS    (2 * EXT3_EA_TRANS_BLOCKS + 1)
-#define SNAP_DELETELIST_TRANS_BLOCKS    (2 * EXT3_EA_TRANS_BLOCKS + 2)
-#define SNAP_COPYBLOCK_TRANS_BLOCKS     (EXT3_DATA_TRANS_BLOCKS)
-#define SNAP_MIGRATEDATA_TRANS_BLOCKS   2
-#define SNAP_SETIND_TRANS_BLOCKS        (SNAP_INSERTLIST_TRANS_BLOCKS + 1)
-#define SNAP_ADDORPHAN_TRANS_BLOCKS     2
-#define SNAP_REMOVEORPHAN_TRANS_BLOCKS  1
-#define SNAP_RESTOREORPHAN_TRANS_BLOCKS (EXT3_EA_TRANS_BLOCKS + \
-                                         SNAP_DELETELIST_TRANS_BLOCKS + \
-                                         EXT3_NEWINODE_TRANS_BLOCKS + \
-                                         2 * SNAP_MIGRATEDATA_TRANS_BLOCKS)
-#define SNAP_BIGCOPY_TRANS_BLOCKS       (2 * EXT3_DATA_TRANS_BLOCKS)
-#define SNAP_CREATEIND_TRANS_BLOCKS     (EXT3_NEWINODE_TRANS_BLOCKS + \
-                                         SNAP_MIGRATEDATA_TRANS_BLOCKS + \
-                                         SNAP_SETIND_TRANS_BLOCKS + \
-                                         SNAP_BIGCOPY_TRANS_BLOCKS + 3)
-#define SNAP_MIGRATEBLK_TRANS_BLOCKS    2
-#define SNAP_DESTROY_TRANS_BLOCKS       (SNAP_DELETELIST_TRANS_BLOCKS + \
-                                         EXT3_EA_TRANS_BLOCKS + 2)
-#define SNAP_RESTORE_TRANS_BLOCKS       (EXT3_NEWINODE_TRANS_BLOCKS + \
-                                         2 * SNAP_MIGRATEDATA_TRANS_BLOCKS + 1)
 /*Snap Table*/
 #define SNAP_MAX               32      
 #define SNAP_MAX_TABLES        32      
 #define SNAP_MAX_NAMELEN       64
 
-#define MAX_SNAPTABLE_COUNT     "MAXSnapCount"
-#define SNAPTABLE_MAGIC                0x19760218
-#define SNAPTABLE_INFO          "snaptable"
-#define SNAP_GENERATION         "snap_generation"
+#define MAX_SNAPTABLE_COUNT  "MAXSnapCount"
+#define SNAPTABLE_MAGIC             0x19760218
+#define SNAPTABLE_INFO       "snaptable"
+#define SNAP_GENERATION      "snap_generation"
+#define SNAP_COUNT           "snapcount"
+#define SNAP_ROOT_INO        "snap_root_ino"
+
+#define SNAP_LOOKUP     (REINT_MAX + 1)
 
 struct snap {
         time_t          sn_time;
@@ -162,15 +142,33 @@ struct snap_table {
        struct  snap    sntbl_items[0];
 };
 
+#define DOT_NAME_MAX_LEN 32 
+struct snap_dot_info {
+        char    *dot_name;
+        int     dot_name_len;
+        int     dot_snap_enable; 
+};
+
 struct snap_info {
+       struct list_head         sni_list;
+        ino_t                    sni_root_ino;
+        struct semaphore         sni_sema;
+       spinlock_t               sni_lock;
+        struct snap_table        *sni_table;
+        struct dentry            *sni_cowed_dentry;
+        struct snap_dot_info     *sni_dot_info;
+};
+
+struct snap_super_info {
         struct fsfilt_operations *snap_fsfilt;  
-        struct fsfilt_operations *snap_cache_fsfilt;  
-       struct semaphore         sntbl_sema;
-       spinlock_t               sntbl_lock;
-        struct snap_table        *sntbl;
-        struct dentry            *sn_cowed_dentry;
+        struct fsfilt_operations *snap_cache_fsfilt; 
+        struct list_head          snap_list;
+        int                       snap_table_size;
+        int                       snap_count;
 };
-extern int smfs_add_snap_item(struct super_block *sb, char *name);
+
+extern int smfs_add_snap_item(struct super_block *sb, char *path_name, 
+                              char *name);
 extern int smfs_start_cow(struct super_block *sb);
 extern int smfs_stop_cow(struct super_block *sb);
 
@@ -180,6 +178,37 @@ struct write_extents {
 };
 int smfs_cow(struct inode *dir, struct dentry *dentry,
              void *data1, void *data2, int op);
-int smfs_cow_write(struct inode *inode, struct dentry *dentry, void *data1,
-                   void *data2);
+int smfs_cow_write_pre(struct inode *inode, void *de, void *data1, void *data2);
+struct inode* smfs_cow_get_ind(struct inode *inode, int index);
+
+
+#define DOT_SNAP_NAME          ".snap"
+#define DOT_SNAP_INDEX         0xffff
+static inline int smfs_primary_inode(struct inode *inode)
+{
+        struct snap_inode_info *sn_info = &I2SMI(inode)->sm_sninfo;
+
+        if (sn_info->sn_index == 0)
+                return 1; 
+        return 0; 
+}
+static inline int smfs_dotsnap_inode(struct inode *inode)
+{
+        struct snap_inode_info *sn_info = &I2SMI(inode)->sm_sninfo;
+
+        if (sn_info->sn_index == DOT_SNAP_INDEX)
+                return 1; 
+        return 0; 
+}
+static inline int smfs_under_dotsnap_inode(struct inode *inode)
+{
+        struct snap_inode_info *sn_info = &I2SMI(inode)->sm_sninfo;
+        
+        if (sn_info->sn_index > 0 && sn_info->sn_index != DOT_SNAP_INDEX)
+                return 1;
+        return 0; 
+}
+#define SNAP_MINOR 242
+#define SNAP_MAJOR 10
+
 #endif /*_LUSTRE_SNAP_H*/