imsm: Block array state change during reshape

[thirdparty/mdadm.git] / mdadm.h

diff --git a/mdadm.h b/mdadm.h
index ff9c72f7a8ec2faf28547ef0bda0a828d29c4657..36124dea9a0dd5198aa62602c4390cbdff6e49be 100644 (file)
--- a/mdadm.h
+++ b/mdadm.h
@@ -310,6 +310,7 @@ enum special_options {
        Fork,
        Bitmap,
        RebuildMapOpt,
+       InvalidBackup,
 };
 
 /* structures read from config file */
@@ -386,7 +387,6 @@ struct mdstat_ent {
        int             resync; /* 3 if check, 2 if reshape, 1 if resync, 0 if recovery */
        int             devcnt;
        int             raid_disks;
-       int             chunk_size;
        char *          metadata_version;
        struct dev_member {
                char                    *name;
@@ -401,6 +401,7 @@ extern void mdstat_wait(int seconds);
 extern void mdstat_wait_fd(int fd, const sigset_t *sigmask);
 extern int mddev_busy(int devnum);
 extern struct mdstat_ent *mdstat_by_component(char *name);
+extern struct mdstat_ent *mdstat_by_subdev(char *subdev, int container);
 
 struct map_ent {
        struct map_ent *next;
@@ -475,7 +476,25 @@ extern int sysfs_disk_to_scsi_id(int fd, __u32 *id);
 extern int sysfs_unique_holder(int devnum, long rdev);
 extern int sysfs_freeze_array(struct mdinfo *sra);
 extern int load_sys(char *path, char *buf);
-
+extern int reshape_prepare_fdlist(char *devname,
+                                 struct mdinfo *sra,
+                                 int raid_disks,
+                                 int nrdisks,
+                                 unsigned long blocks,
+                                 char *backup_file,
+                                 int *fdlist,
+                                 unsigned long long *offsets);
+extern void reshape_free_fdlist(int *fdlist,
+                               unsigned long long *offsets,
+                               int size);
+extern int reshape_open_backup_file(char *backup,
+                                   int fd,
+                                   char *devname,
+                                   long blocks,
+                                   int *fdlist,
+                                   unsigned long long *offsets);
+extern unsigned long compute_backup_blocks(int nchunk, int ochunk,
+                                          unsigned int ndata, unsigned int odata);
 
 extern int save_stripes(int *source, unsigned long long *offsets,
                        int raid_disks, int chunk_size, int level, int layout,
@@ -616,7 +635,11 @@ extern struct superswitch {
         * when hot-adding a spare.
         */
        int (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo,
-                            int fd, char *devname);
+                           int fd, char *devname);
+       /* update the metadata to delete a device,
+        * when hot-removing.
+        */
+       int (*remove_from_super)(struct supertype *st, mdu_disk_info_t *dinfo);
 
        /* Write metadata to one device when fixing problems or adding
         * a new device.
@@ -741,6 +764,9 @@ struct metadata_update {
        int     len;
        char    *buf;
        void    *space; /* allocated space that monitor will use */
+       void    **space_list; /* list of allocated spaces that monitor can
+                              * use or that it returned.
+                              */
        struct metadata_update *next;
 };
 
@@ -794,7 +820,7 @@ static inline struct supertype *guess_super(int fd) {
 extern struct supertype *dup_super(struct supertype *st);
 extern int get_dev_size(int fd, char *dname, unsigned long long *sizep);
 extern int must_be_container(int fd);
-extern int dev_size_from_id(unsigned id, unsigned long long *size);
+extern int dev_size_from_id(dev_t id, unsigned long long *size);
 extern void get_one_disk(int mdfd, mdu_array_info_t *ainf,
                         mdu_disk_info_t *disk);
 void wait_for(char *dev, int fd);
@@ -941,13 +967,15 @@ extern int Manage_ro(char *devname, int fd, int readonly);
 extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
 extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
 extern int Manage_subdevs(char *devname, int fd,
-                         struct mddev_dev *devlist, int verbose, int test);
+                         struct mddev_dev *devlist, int verbose, int test,
+                         char *update);
 extern int autodetect(void);
 extern int Grow_Add_device(char *devname, int fd, char *newdev);
 extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force);
 extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
                        long long size,
-                       int level, char *layout_str, int chunksize, int raid_disks);
+                       int level, char *layout_str, int chunksize, int raid_disks,
+                       int force);
 extern int Grow_restart(struct supertype *st, struct mdinfo *info,
                        int *fdlist, int cnt, char *backup_file, int verbose);
 extern int Grow_continue(int mdfd, struct supertype *st,
@@ -955,7 +983,8 @@ extern int Grow_continue(int mdfd, struct supertype *st,
 
 extern int Assemble(struct supertype *st, char *mddev,
                    struct mddev_ident *ident,
-                   struct mddev_dev *devlist, char *backup_file,
+                   struct mddev_dev *devlist,
+                   char *backup_file, int invalid_backup,
                    int readonly, int runstop,
                    char *update, char *homehost, int require_homehost,
                    int verbose, int force);
@@ -1040,6 +1069,7 @@ extern char *conf_word(FILE *file, int allow_key);
 extern int conf_name_is_free(char *name);
 extern int devname_matches(char *name, char *match);
 extern struct mddev_ident *conf_match(struct mdinfo *info, struct supertype *st);
+extern int experimental(void);
 
 extern void free_line(char *line);
 extern int match_oneof(char *devices, char *devname);
@@ -1068,6 +1098,8 @@ extern int assemble_container_content(struct supertype *st, int mdfd,
 
 extern int add_disk(int mdfd, struct supertype *st,
                    struct mdinfo *sra, struct mdinfo *info);
+extern int remove_disk(int mdfd, struct supertype *st,
+                      struct mdinfo *sra, struct mdinfo *info);
 extern int set_array_info(int mdfd, struct supertype *st, struct mdinfo *info);
 unsigned long long min_recovery_start(struct mdinfo *array);
 
@@ -1105,6 +1137,7 @@ extern __u32 random32(void);
 extern int start_mdmon(int devnum);
 
 extern char *devnum2devname(int num);
+extern void fmt_devname(char *name, int num);
 extern int devname2devnum(char *name);
 extern int stat2devnum(struct stat *st);
 extern int fd2devnum(int fd);
@@ -1134,7 +1167,9 @@ static inline int is_subarray(char *vers)
        /* The version string for a 'subarray' (an array in a container)
         * is 
         *    /containername/componentname    for normal read-write arrays
-        *    -containername/componentname    for read-only arrays.
+        *    -containername/componentname    for arrays which mdmon must not
+        *                                    reconfigure.  They might be read-only
+        *                                    or might be undergoing reshape etc.
         * containername is e.g. md0, md_d1
         * componentname is dependant on the metadata. e.g. '1' 'S1' ...
         */