UBIFS: introduce more I/O helpers

Introduce the following I/O helper functions: 'ubifs_leb_read()',
'ubifs_leb_write()', 'ubifs_leb_change()', 'ubifs_leb_unmap()',
'ubifs_leb_map()', 'ubifs_is_mapped().

The idea is to wrap all UBI I/O functions in order to encapsulate various
assertions and error path handling (error message, stack dump, switching to R/O
mode). And there are some other benefits of this which will be used in the
following patches.

This patch does not switch whole UBIFS to use these functions yet.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/fs/ubifs/debug.h b/fs/ubifs/debug.h
index e1dcfd29c9aa..b0b005b97279 100644
--- a/fs/ubifs/debug.h
+++ b/fs/ubifs/debug.h
@@ -244,6 +244,10 @@ static inline int dbg_is_tst_rcvry(const struct ubifs_info *c)
 {
         return !!(ubifs_dbg.tst_rcvry || c->dbg->tst_rcvry);
 }
+static inline int dbg_is_power_cut(const struct ubifs_info *c)
+{
+        return !!c->dbg->failure_mode;
+}
 
 int ubifs_debugging_init(struct ubifs_info *c);
 void ubifs_debugging_exit(struct ubifs_info *c);
@@ -445,12 +449,24 @@ static inline int
 dbg_check_nondata_nodes_order(struct ubifs_info *c,
                               struct list_head *head)             { return 0; }
 
+static inline int dbg_leb_write(struct ubi_volume_desc *desc,
+                                int lnum, const void *buf,
+                                int offset, int len, int dtype)   { return 0; }
+static inline int dbg_leb_change(struct ubi_volume_desc *desc,
+                                 int lnum, const void *buf,
+                                 int len, int dtype)              { return 0; }
+static inline int dbg_leb_unmap(struct ubi_volume_desc *desc,
+                                int lnum)                         { return 0; }
+static inline int dbg_leb_map(struct ubi_volume_desc *desc,
+                              int lnum, int dtype)                { return 0; }
+
 static inline int dbg_is_chk_gen(const struct ubifs_info *c)      { return 0; }
 static inline int dbg_is_chk_index(const struct ubifs_info *c)    { return 0; }
 static inline int dbg_is_chk_orph(const struct ubifs_info *c)     { return 0; }
 static inline int dbg_is_chk_lprops(const struct ubifs_info *c)   { return 0; }
 static inline int dbg_is_chk_fs(const struct ubifs_info *c)       { return 0; }
 static inline int dbg_is_tst_rcvry(const struct ubifs_info *c)    { return 0; }
+static inline int dbg_is_power_cut(const struct ubifs_info *c)    { return 0; }
 
 static inline int dbg_debugfs_init(void)                          { return 0; }
 static inline void dbg_debugfs_exit(void)                         { return; }