Dirt simple logging

Passes usertests and stressfs
Seems to recover correctly in a number of simple cases

1 files changed, 8 insertions, 0 deletions

diff --git a/defs.h b/defs.h
index 8ea46d6..bbe4ae4 100644
--- a/defs.h
+++ b/defs.h
@@ -6,6 +6,7 @@ struct pipe;
 struct proc;
 struct spinlock;
 struct stat;
+struct superblock;
 
 // bio.c
 void            binit(void);
@@ -32,6 +33,7 @@ int             filestat(struct file*, struct stat*);
 int             filewrite(struct file*, char*, int n);
 
 // fs.c
+void            readsb(int dev, struct superblock *sb);
 int             dirlink(struct inode*, char*, uint);
 struct inode*   dirlookup(struct inode*, char*, uint*);
 struct inode*   ialloc(uint, short);
@@ -75,6 +77,12 @@ void            lapicinit(int);
 void            lapicstartap(uchar, uint);
 void            microdelay(int);
 
+// log.c
+void            initlog(void);
+void            log_write(struct buf*);
+void            begin_trans();
+void            commit_trans();
+
 // mp.c
 extern int      ismp;
 int             mpbcpu(void);