UBIFS: make force in-the-gaps to be a general self-check

UBIFS can force itself to use the 'in-the-gaps' commit method - the last resort
method which is normally invoced very very rarely. Currently this "force
int-the-gaps" debugging feature is a separate test mode. But it is a bit saner
to make it to be the "general" self-test check instead.

This patch is just a clean-up which should make the debugging code look a bit
nicer and easier to use - we have way too many debugging options.

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

diff --git a/Documentation/filesystems/ubifs.txt b/Documentation/filesystems/ubifs.txt
index d7b13b0..7d17e5b 100644 (file)
--- a/Documentation/filesystems/ubifs.txt
+++ b/Documentation/filesystems/ubifs.txt
@@ -154,7 +154,6 @@ debug_tsts  Selects a mode of testing, as follows:
 
                Test mode                               Flag value
 
-               Force in-the-gaps method                2
                Failure mode for recovery testing       4
 
 For example, set debug_msgs to 5 to display General messages and Mount

diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index 546ad57..06d171c 100644 (file)
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -34,7 +34,6 @@
 #include <linux/moduleparam.h>
 #include <linux/debugfs.h>
 #include <linux/math64.h>
-#include <linux/slab.h>
 
 #ifdef CONFIG_UBIFS_FS_DEBUG
 
@@ -2458,14 +2457,12 @@ error_dump:
        return 0;
 }
 
-static int invocation_cnt;
-
 int dbg_force_in_the_gaps(void)
 {
-       if (!dbg_force_in_the_gaps_enabled)
+       if (!(ubifs_chk_flags & UBIFS_CHK_GEN))
                return 0;
-       /* Force in-the-gaps every 8th commit */
-       return !((invocation_cnt++) & 0x7);
+
+       return !(random32() & 7);
 }
 
 /* Failure mode for recovery testing */

diff --git a/fs/ubifs/debug.h b/fs/ubifs/debug.h
index 6b5fe7b..8934c12 100644 (file)
--- a/fs/ubifs/debug.h
+++ b/fs/ubifs/debug.h
@@ -31,6 +31,8 @@ typedef int (*dbg_znode_callback)(struct ubifs_info *c,
 
 #ifdef CONFIG_UBIFS_FS_DEBUG
 
+#include <linux/random.h>
+
 /**
  * ubifs_debug_info - per-FS debugging information.
  * @old_zroot: old index root - used by 'dbg_check_old_index()'
@@ -237,11 +239,9 @@ enum {
 /*
  * Special testing flags.
  *
- * UBIFS_TST_FORCE_IN_THE_GAPS: force the use of in-the-gaps method
  * UBIFS_TST_RCVRY: failure mode for recovery testing
  */
 enum {
-       UBIFS_TST_FORCE_IN_THE_GAPS = 0x2,
        UBIFS_TST_RCVRY             = 0x4,
 };
 
@@ -308,18 +308,16 @@ int dbg_check_data_nodes_order(struct ubifs_info *c, struct list_head *head);
 int dbg_check_nondata_nodes_order(struct ubifs_info *c, struct list_head *head);
 
 /* Force the use of in-the-gaps method for testing */
-
-#define dbg_force_in_the_gaps_enabled \
-       (ubifs_tst_flags & UBIFS_TST_FORCE_IN_THE_GAPS)
-
+static inline int dbg_force_in_the_gaps_enabled(void)
+{
+       return ubifs_chk_flags & UBIFS_CHK_GEN;
+}
 int dbg_force_in_the_gaps(void);
 
 /* Failure mode for recovery testing */
-
 #define dbg_failure_mode (ubifs_tst_flags & UBIFS_TST_RCVRY)
 
 #ifndef UBIFS_DBG_PRESERVE_UBI
-
 #define ubi_leb_read   dbg_leb_read
 #define ubi_leb_write  dbg_leb_write
 #define ubi_leb_change dbg_leb_change
@@ -327,7 +325,6 @@ int dbg_force_in_the_gaps(void);
 #define ubi_leb_unmap  dbg_leb_unmap
 #define ubi_is_mapped  dbg_is_mapped
 #define ubi_leb_map    dbg_leb_map
-
 #endif
 
 int dbg_leb_read(struct ubi_volume_desc *desc, int lnum, char *buf, int offset,
@@ -488,8 +485,8 @@ dbg_check_nondata_nodes_order(struct ubifs_info *c,
                              struct list_head *head)             { return 0; }
 
 static inline int dbg_force_in_the_gaps(void)                     { return 0; }
-#define dbg_force_in_the_gaps_enabled 0
-#define dbg_failure_mode              0
+#define dbg_force_in_the_gaps_enabled() 0
+#define dbg_failure_mode                0
 
 static inline int dbg_debugfs_init(void)                          { return 0; }
 static inline void dbg_debugfs_exit(void)                         { return; }

diff --git a/fs/ubifs/tnc_commit.c b/fs/ubifs/tnc_commit.c
index c471b06..41920f3 100644 (file)
--- a/fs/ubifs/tnc_commit.c
+++ b/fs/ubifs/tnc_commit.c
@@ -377,12 +377,12 @@ static int layout_in_gaps(struct ubifs_info *c, int cnt)
                                c->gap_lebs = NULL;
                                return err;
                        }
-                       if (!dbg_force_in_the_gaps_enabled) {
+                       if (dbg_force_in_the_gaps_enabled()) {
                                /*
                                 * Do not print scary warnings if the debugging
                                 * option which forces in-the-gaps is enabled.
                                 */
-                               ubifs_err("out of space");
+                               ubifs_warn("out of space");
                                dbg_dump_budg(c, &c->bi);
                                dbg_dump_lprops(c);
                        }