md: raid1/raid10: handle allocation errors during array setup.

[safe/jmp/linux-2.6] / drivers / md / md.h

diff --git a/drivers/md/md.h b/drivers/md/md.h
index bac7c2b..f184b69 100644 (file)
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -30,13 +30,6 @@ typedef struct mddev_s mddev_t;
 typedef struct mdk_rdev_s mdk_rdev_t;
 
 /*
- * options passed in raidrun:
- */
-
-/* Currently this must fit in an 'int' */
-#define MAX_CHUNK_SIZE (1<<30)
-
-/*
  * MD's 'extended' device
  */
 struct mdk_rdev_s
@@ -208,7 +201,7 @@ struct mddev_s
         * INTR:     resync needs to be aborted for some reason
         * DONE:     thread is done and is waiting to be reaped
         * REQUEST:  user-space has requested a sync (used with SYNC)
-        * CHECK:    user-space request for for check-only, no repair
+        * CHECK:    user-space request for check-only, no repair
         * RESHAPE:  A reshape is happening
         *
         * If neither SYNC or RESHAPE are set, then it is a recovery.
@@ -230,6 +223,16 @@ struct mddev_s
                                                            * so we don't loop trying */
 
        int                             in_sync;        /* know to not need resync */
+       /* 'open_mutex' avoids races between 'md_open' and 'do_md_stop', so
+        * that we are never stopping an array while it is open.
+        * 'reconfig_mutex' protects all other reconfiguration.
+        * These locks are separate due to conflicting interactions
+        * with bdev->bd_mutex.
+        * Lock ordering is:
+        *  reconfig_mutex -> bd_mutex : e.g. do_md_run -> revalidate_disk
+        *  bd_mutex -> open_mutex:  e.g. __blkdev_get -> md_open
+        */
+       struct mutex                    open_mutex;
        struct mutex                    reconfig_mutex;
        atomic_t                        active;         /* general refcount */
        atomic_t                        openers;        /* number of active opens */
@@ -427,6 +430,7 @@ extern void md_write_end(mddev_t *mddev);
 extern void md_done_sync(mddev_t *mddev, int blocks, int ok);
 extern void md_error(mddev_t *mddev, mdk_rdev_t *rdev);
 
+extern int mddev_congested(mddev_t *mddev, int bits);
 extern void md_super_write(mddev_t *mddev, mdk_rdev_t *rdev,
                           sector_t sector, int size, struct page *page);
 extern void md_super_wait(mddev_t *mddev);
@@ -437,5 +441,8 @@ extern void md_new_event(mddev_t *mddev);
 extern int md_allow_write(mddev_t *mddev);
 extern void md_wait_for_blocked_rdev(mdk_rdev_t *rdev, mddev_t *mddev);
 extern void md_set_array_sectors(mddev_t *mddev, sector_t array_sectors);
+extern int md_check_no_bitmap(mddev_t *mddev);
+extern int md_integrity_register(mddev_t *mddev);
+void md_integrity_add_rdev(mdk_rdev_t *rdev, mddev_t *mddev);
 
 #endif /* _MD_MD_H */