nilfs2: deny write access to inodes in snapshots

[pandora-kernel.git] / fs / nilfs2 / nilfs.h

diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h
index f032797..cf5507a 100644 (file)
--- a/fs/nilfs2/nilfs.h
+++ b/fs/nilfs2/nilfs.h
@@ -32,7 +32,6 @@
 #include "the_nilfs.h"
 #include "sb.h"
 #include "bmap.h"
-#include "bmap_union.h"
 
 /*
  * nilfs inode data in memory
@@ -41,7 +40,7 @@ struct nilfs_inode_info {
        __u32 i_flags;
        unsigned long  i_state;         /* Dynamic state flags */
        struct nilfs_bmap *i_bmap;
-       union nilfs_bmap_union i_bmap_union;
+       struct nilfs_bmap i_bmap_data;
        __u64 i_xattr;  /* sector_t ??? */
        __u32 i_dir_start_lookup;
        __u64 i_cno;            /* check point number for GC inode */
@@ -60,6 +59,7 @@ struct nilfs_inode_info {
 #endif
        struct buffer_head *i_bh;       /* i_bh contains a new or dirty
                                           disk inode */
+       struct nilfs_root *i_root;
        struct inode vfs_inode;
 };
 
@@ -71,9 +71,7 @@ static inline struct nilfs_inode_info *NILFS_I(const struct inode *inode)
 static inline struct nilfs_inode_info *
 NILFS_BMAP_I(const struct nilfs_bmap *bmap)
 {
-       return container_of((union nilfs_bmap_union *)bmap,
-                           struct nilfs_inode_info,
-                           i_bmap_union);
+       return container_of(bmap, struct nilfs_inode_info, i_bmap_data);
 }
 
 static inline struct inode *NILFS_BTNC_I(struct address_space *btnc)
@@ -106,6 +104,14 @@ enum {
        NILFS_I_GCDAT,                  /* shadow DAT, on memory only */
 };
 
+/*
+ * commit flags for nilfs_commit_super and nilfs_sync_super
+ */
+enum {
+       NILFS_SB_COMMIT = 0,    /* Commit a super block alternately */
+       NILFS_SB_COMMIT_ALL     /* Commit both super blocks */
+};
+
 /*
  * Macros to check inode numbers
  */
@@ -195,12 +201,9 @@ static inline struct inode *nilfs_dat_inode(const struct the_nilfs *nilfs)
  */
 #ifdef CONFIG_NILFS_POSIX_ACL
 #error "NILFS: not yet supported POSIX ACL"
-extern int nilfs_permission(struct inode *, int, struct nameidata *);
 extern int nilfs_acl_chmod(struct inode *);
 extern int nilfs_init_acl(struct inode *, struct inode *);
 #else
-#define nilfs_permission   NULL
-
 static inline int nilfs_acl_chmod(struct inode *inode)
 {
        return 0;
@@ -242,11 +245,15 @@ extern int nilfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
 extern void nilfs_set_inode_flags(struct inode *);
 extern int nilfs_read_inode_common(struct inode *, struct nilfs_inode *);
 extern void nilfs_write_inode_common(struct inode *, struct nilfs_inode *, int);
-extern struct inode *nilfs_iget(struct super_block *, unsigned long);
+struct inode *nilfs_iget(struct super_block *sb, struct nilfs_root *root,
+                        unsigned long ino);
+extern struct inode *nilfs_iget_for_gc(struct super_block *sb,
+                                      unsigned long ino, __u64 cno);
 extern void nilfs_update_inode(struct inode *, struct buffer_head *);
 extern void nilfs_truncate(struct inode *);
 extern void nilfs_evict_inode(struct inode *);
 extern int nilfs_setattr(struct dentry *, struct iattr *);
+int nilfs_permission(struct inode *inode, int mask);
 extern int nilfs_load_inode_block(struct nilfs_sb_info *, struct inode *,
                                  struct buffer_head **);
 extern int nilfs_inode_dirty(struct inode *);
@@ -255,9 +262,6 @@ extern int nilfs_set_file_dirty(struct nilfs_sb_info *, struct inode *,
 extern int nilfs_mark_inode_dirty(struct inode *);
 extern void nilfs_dirty_inode(struct inode *);
 
-/* namei.c */
-extern struct dentry *nilfs_get_parent(struct dentry *);
-
 /* super.c */
 extern struct inode *nilfs_alloc_inode_common(struct the_nilfs *);
 extern struct inode *nilfs_alloc_inode(struct super_block *);
@@ -270,9 +274,16 @@ extern struct nilfs_super_block *
 nilfs_read_super_block(struct super_block *, u64, int, struct buffer_head **);
 extern int nilfs_store_magic_and_option(struct super_block *,
                                        struct nilfs_super_block *, char *);
+extern int nilfs_check_feature_compatibility(struct super_block *,
+                                            struct nilfs_super_block *);
+extern void nilfs_set_log_cursor(struct nilfs_super_block *,
+                                struct the_nilfs *);
+extern struct nilfs_super_block **nilfs_prepare_super(struct nilfs_sb_info *,
+                                                     int flip);
 extern int nilfs_commit_super(struct nilfs_sb_info *, int);
-extern int nilfs_attach_checkpoint(struct nilfs_sb_info *, __u64);
-extern void nilfs_detach_checkpoint(struct nilfs_sb_info *);
+extern int nilfs_cleanup_super(struct nilfs_sb_info *);
+int nilfs_attach_checkpoint(struct nilfs_sb_info *sbi, __u64 cno, int curr_mnt,
+                           struct nilfs_root **root);
 
 /* gcinode.c */
 int nilfs_gccache_submit_read_data(struct inode *, sector_t, sector_t, __u64,
@@ -280,11 +291,8 @@ int nilfs_gccache_submit_read_data(struct inode *, sector_t, sector_t, __u64,
 int nilfs_gccache_submit_read_node(struct inode *, sector_t, __u64,
                                   struct buffer_head **);
 int nilfs_gccache_wait_and_mark_dirty(struct buffer_head *);
-int nilfs_init_gccache(struct the_nilfs *);
-void nilfs_destroy_gccache(struct the_nilfs *);
-void nilfs_clear_gcinode(struct inode *);
-struct inode *nilfs_gc_iget(struct the_nilfs *, ino_t, __u64);
-void nilfs_remove_all_gcinode(struct the_nilfs *);
+int nilfs_init_gcinode(struct inode *inode);
+void nilfs_remove_all_gcinodes(struct the_nilfs *nilfs);
 
 /* gcdat.c */
 int nilfs_init_gcdat_inode(struct the_nilfs *);