mdmon: fork and run as a daemon.

[thirdparty/mdadm.git] / mdadm.h

diff --git a/mdadm.h b/mdadm.h
index e23a7033de0356f803d156c7af835ea11c54a37a..2c941cc0963cf0783072d96f2c6098de389346f2 100644 (file)
--- a/mdadm.h
+++ b/mdadm.h
@@ -348,6 +348,7 @@ extern int sysfs_set_array(struct mdinfo *sra,
 extern int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd);
 extern int sysfs_disk_to_sg(int fd);
 extern int sysfs_disk_to_scsi_id(int fd, __u32 *id);
+extern int sysfs_unique_holder(int devnum, long rdev);
 
 
 extern int save_stripes(int *source, unsigned long long *offsets,
@@ -501,10 +502,20 @@ extern struct superswitch {
        void (*locate_bitmap)(struct supertype *st, int fd);
        int (*write_bitmap)(struct supertype *st, int fd);
        void (*free_super)(struct supertype *st);
+
+       /* validate_geometry is called with an st returned by
+        * match_metadata_desc.
+        * It should check that the geometry described in compatible with
+        * the metadata type.  It will be called repeatedly as devices
+        * added to validate changing size and new devices.  If there are
+        * inter-device dependencies, it should record sufficient details
+        * so these can be validated.
+        */
        int (*validate_geometry)(struct supertype *st, int level, int layout,
                                 int raiddisks,
                                 int chunk, unsigned long long size,
-                                char *subdev, unsigned long long *freesize);
+                                char *subdev, unsigned long long *freesize,
+                                int verbose);
 
        struct mdinfo *(*container_content)(struct supertype *st);
 
@@ -532,6 +543,8 @@ extern struct superswitch {
        void (*sync_metadata)(struct supertype *st);
        void (*process_update)(struct supertype *st,
                               struct metadata_update *update);
+       void (*prepare_update)(struct supertype *st,
+                              struct metadata_update *update);
 
        /* activate_spare will check if the array is degraded and, if it
         * is, try to find some spare space in the container.
@@ -549,6 +562,13 @@ extern struct superswitch {
 
 extern struct superswitch super_imsm;
 
+struct metadata_update {
+       int     len;
+       char    *buf;
+       void    *space; /* allocated space that monitor will use */
+       struct metadata_update *next;
+};
+
 /* A supertype holds a particular collection of metadata.
  * It identifies the metadata type by the superswitch, and the particular
  * sub-version of that metadata type.
@@ -569,11 +589,12 @@ struct supertype {
        void *sb;
        void *info;
 
+       struct metadata_update *updates;
+       struct metadata_update **update_tail;
+
        /* extra stuff used by mdmon */
        struct active_array *arrays;
        int sock; /* listen to external programs */
-       int mgr_pipe[2]; /* communicate between threads */
-       int mon_pipe[2]; /* communicate between threads */
        int devnum;
        char *devname; /* e.g. md0.  This appears in metadata_verison:
                        *  external:/md0/12
@@ -730,6 +751,8 @@ extern unsigned long long get_component_size(int fd);
 extern void remove_partitions(int fd);
 extern unsigned long long calc_array_size(int level, int raid_disks, int layout,
                                   int chunksize, unsigned long long devsize);
+extern int flush_metadata_updates(struct supertype *st);
+extern void append_metadata_update(struct supertype *st, void *buf, int len);
 
 
 extern char *human_size(long long bytes);
@@ -750,8 +773,11 @@ extern int open_container(int fd);
 
 extern int mdmon_running(int devnum);
 extern int signal_mdmon(int devnum);
+extern int env_no_mdmon(void);
+extern int start_mdmon(int devnum);
 
 extern char *devnum2devname(int num);
+extern int devname2devnum(char *name);
 extern int fd2devnum(int fd);
 
 static inline int dev2major(int d)
@@ -769,6 +795,11 @@ static inline int dev2minor(int d)
        return (-1-d) << MdpMinorShift;
 }
 
+static inline int ROUND_UP(int a, int base)
+{
+       return ((a+base-1)/base)*base;
+}
+
 #define        LEVEL_MULTIPATH         (-4)
 #define        LEVEL_LINEAR            (-1)
 #define        LEVEL_FAULTY            (-5)