Safeguard against writing to an active device of another node

[thirdparty/mdadm.git] / mdadm.h

diff --git a/mdadm.h b/mdadm.h
index 54a84efc21cbcde77d0711cda1a72e807a1c107b..b95697df128ccb6f505d42b62587bab64773da01 100644 (file)
--- a/mdadm.h
+++ b/mdadm.h
@@ -35,6 +35,7 @@ extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
 
 #include       <sys/types.h>
 #include       <sys/stat.h>
+#include       <stdint.h>
 #include       <stdlib.h>
 #include       <time.h>
 #include       <sys/time.h>
@@ -51,6 +52,25 @@ extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
 #define srandom srand
 #endif
 
+#ifndef NO_DLM
+#include       <libdlm.h>
+#include       <errno.h>
+#else
+#define LKF_NOQUEUE    0x00000001
+#define LKF_CONVERT    0x00000004
+#define LKM_PWMODE     4
+#define EUNLOCK                0x10002
+
+typedef void *dlm_lshandle_t;
+
+struct dlm_lksb {
+       int sb_status;
+       uint32_t sb_lkid;
+       char sb_flags;
+       char *sb_lvbptr;
+};
+#endif
+
 #include       <linux/kdev_t.h>
 /*#include     <linux/fs.h> */
 #include       <sys/mount.h>
@@ -347,6 +367,7 @@ enum special_options {
        Nodes,
        ClusterName,
        ClusterConfirm,
+       WriteJournal,
 };
 
 enum prefix_standard {
@@ -434,6 +455,7 @@ struct context {
 struct shape {
        int     raiddisks;
        int     sparedisks;
+       int     journaldisks;
        int     level;
        int     layout;
        char    *layout_str;
@@ -501,18 +523,8 @@ extern int map_update(struct map_ent **mpp, char *devnm, char *metadata,
                      int uuid[4], char *path);
 extern void map_remove(struct map_ent **map, char *devnm);
 extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]);
-#ifdef MDASSEMBLE
-static inline struct map_ent *map_by_devnm(struct map_ent **map, char *name)
-{
-       return NULL;
-}
-static inline void map_free(struct map_ent *map)
-{
-}
-#else
 extern struct map_ent *map_by_devnm(struct map_ent **map, char *devnm);
 extern void map_free(struct map_ent *map);
-#endif
 extern struct map_ent *map_by_name(struct map_ent **map, char *name);
 extern void map_read(struct map_ent **melp);
 extern int map_write(struct map_ent *mel);
@@ -549,6 +561,7 @@ enum sysfs_read_flags {
  */
 extern int sysfs_open(char *devnm, char *devname, char *attr);
 extern void sysfs_init(struct mdinfo *mdi, int fd, char *devnm);
+extern void sysfs_init_dev(struct mdinfo *mdi, unsigned long devid);
 extern void sysfs_free(struct mdinfo *sra);
 extern struct mdinfo *sysfs_read(int fd, char *devnm, unsigned long options);
 extern int sysfs_attr_match(const char *attr, const char *str);
@@ -977,6 +990,9 @@ extern struct superswitch {
        /* validate container after assemble */
        int (*validate_container)(struct mdinfo *info);
 
+       /* whether the array require a journal device */
+       int (*require_journal)(struct supertype *st);
+
        int swapuuid; /* true if uuid is bigending rather than hostendian */
        int external;
        const char *name; /* canonical metadata name */
@@ -1427,7 +1443,32 @@ extern char *stat2devnm(struct stat *st);
 extern char *fd2devnm(int fd);
 
 extern int in_initrd(void);
+
+struct dlm_hooks {
+       void *dlm_handle;       /* dlm lib related */
+
+       dlm_lshandle_t (*create_lockspace)(const char *name,
+                                          unsigned int mode);
+       int (*release_lockspace)(const char *name, dlm_lshandle_t ls,
+                                int force);
+       int (*ls_lock)(dlm_lshandle_t lockspace, uint32_t mode,
+                      struct dlm_lksb *lksb, uint32_t flags,
+                      const void *name, unsigned int namelen,
+                      uint32_t parent, void (*astaddr) (void *astarg),
+                      void *astarg, void (*bastaddr) (void *astarg),
+                      void *range);
+       int (*ls_unlock)(dlm_lshandle_t lockspace, uint32_t lkid,
+                        uint32_t flags, struct dlm_lksb *lksb,
+                        void *astarg);
+       int (*ls_get_fd)(dlm_lshandle_t ls);
+       int (*dispatch)(int fd);
+};
+
 extern int get_cluster_name(char **name);
+extern int is_clustered(struct supertype *st);
+extern int cluster_get_dlmlock(struct supertype *st, int *lockid);
+extern int cluster_release_dlmlock(struct supertype *st, int lockid);
+extern void set_dlm_hooks(void);
 
 #define _ROUND_UP(val, base)   (((val) + (base) - 1) & ~(base - 1))
 #define ROUND_UP(val, base)    _ROUND_UP(val, (typeof(val))(base))