#include "md_u.h"
#include "md_p.h"
#include "bitmap.h"
+#include "msg.h"
#include <endian.h>
/* Redhat don't like to #include <asm/byteorder.h>, and
#define __le16_to_cpu(_x) (_x)
#define __le32_to_cpu(_x) (_x)
#define __le64_to_cpu(_x) (_x)
+
+#define __cpu_to_be16(_x) bswap_16(_x)
+#define __cpu_to_be32(_x) bswap_32(_x)
+#define __cpu_to_be64(_x) bswap_64(_x)
+#define __be16_to_cpu(_x) bswap_16(_x)
+#define __be32_to_cpu(_x) bswap_32(_x)
+#define __be64_to_cpu(_x) bswap_64(_x)
#elif BYTE_ORDER == BIG_ENDIAN
#define __cpu_to_le16(_x) bswap_16(_x)
#define __cpu_to_le32(_x) bswap_32(_x)
#define __le16_to_cpu(_x) bswap_16(_x)
#define __le32_to_cpu(_x) bswap_32(_x)
#define __le64_to_cpu(_x) bswap_64(_x)
+
+#define __cpu_to_be16(_x) (_x)
+#define __cpu_to_be32(_x) (_x)
+#define __cpu_to_be64(_x) (_x)
+#define __be16_to_cpu(_x) (_x)
+#define __be32_to_cpu(_x) (_x)
+#define __be64_to_cpu(_x) (_x)
#else
# error "unknown endianness."
#endif
int uuid[4];
char name[33];
unsigned long long data_offset;
- unsigned long long component_size;
+ unsigned long long component_size; /* same as array.size, except in
+ * sectors and up to 64bits.
+ */
+ unsigned long long custom_array_size; /* size for non-default sized
+ * arrays (in sectors)
+ */
int reshape_active;
unsigned long long reshape_progress;
+ unsigned long long resync_start;
+ unsigned long safe_mode_delay; /* ms delay to mark clean */
int new_level, delta_disks, new_layout, new_chunk;
int errors;
int cache_size; /* size of raid456 stripe cache*/
int mismatch_cnt;
char text_version[50];
+ int container_member; /* for assembling external-metatdata arrays
+ * This is to be used internally by metadata
+ * handler only */
+
char sys_name[20];
struct mdinfo *devs;
struct mdinfo *next;
+
+ /* Device info for mdmon: */
+ int state_fd;
+ #define DS_FAULTY 1
+ #define DS_INSYNC 2
+ #define DS_WRITE_MOSTLY 4
+ #define DS_SPARE 8
+ #define DS_BLOCKED 16
+ #define DS_REMOVE 1024
+ #define DS_UNBLOCK 2048
+ int prev_state, curr_state, next_state;
+
};
struct createinfo {
AutoHomeHost,
Symlinks,
AutoDetect,
+ Waitclean,
+ DetailPlatform,
};
/* structures read from config file */
char *bitmap_file;
int bitmap_fd;
+ char *container; /* /dev/whatever name of container, or
+ * uuid of container. You would expect
+ * this to be the 'devname' or UUID
+ * of some other entry.
+ */
+ char *member; /* subarray within a container */
+
struct mddev_ident_s *next;
} *mddev_ident_t;
char writemostly; /* 1 for 'set writemostly', 2 for 'clear writemostly' */
char re_add;
char used; /* set when used */
+ struct mdinfo *content; /* If devname is a container, this might list
+ * the remaining member arrays. */
struct mddev_dev_s *next;
} *mddev_dev_t;
char *pattern; /* U or up, _ for down */
int percent; /* -1 if no resync */
int resync; /* 1 if resync, 0 if recovery */
+ int devcnt;
+ int raid_disks;
+ int chunk_size;
+ char * metadata_version;
struct mdstat_ent *next;
};
extern struct mdstat_ent *mdstat_read(int hold, int start);
extern void free_mdstat(struct mdstat_ent *ms);
extern void mdstat_wait(int seconds);
+extern void mdstat_wait_fd(int fd, const sigset_t *sigmask);
extern int mddev_busy(int devnum);
struct map_ent {
struct map_ent *next;
int devnum;
- int major,minor;
+ char metadata[20];
int uuid[4];
+ int bad;
char *path;
};
-extern int map_update(struct map_ent **mpp, int devnum, int major, int minor,
+extern int map_update(struct map_ent **mpp, int devnum, char *metadata,
int uuid[4], char *path);
extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]);
+extern struct map_ent *map_by_devnum(struct map_ent **map, int devnum);
+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);
extern void map_delete(struct map_ent **mapp, int devnum);
extern void map_free(struct map_ent *map);
extern void map_add(struct map_ent **melp,
- int devnum, int major, int minor, int uuid[4], char *path);
+ int devnum, char *metadata, int uuid[4], char *path);
+extern int map_lock(struct map_ent **melp);
+extern void map_unlock(struct map_ent **melp);
/* various details can be requested */
-#define GET_LEVEL 1
-#define GET_LAYOUT 2
-#define GET_COMPONENT 4
-#define GET_CHUNK 8
-#define GET_CACHE 16
-#define GET_MISMATCH 32
-#define GET_VERSION 64
-
-#define GET_DEVS 1024 /* gets role, major, minor */
-#define GET_OFFSET 2048
-#define GET_SIZE 4096
-#define GET_STATE 8192
-#define GET_ERROR 16384
+enum sysfs_read_flags {
+ GET_LEVEL = (1 << 0),
+ GET_LAYOUT = (1 << 1),
+ GET_COMPONENT = (1 << 2),
+ GET_CHUNK = (1 << 3),
+ GET_CACHE = (1 << 4),
+ GET_MISMATCH = (1 << 5),
+ GET_VERSION = (1 << 6),
+ GET_DISKS = (1 << 7),
+ GET_DEGRADED = (1 << 8),
+ GET_SAFEMODE = (1 << 9),
+ GET_DEVS = (1 << 10), /* gets role, major, minor */
+ GET_OFFSET = (1 << 11),
+ GET_SIZE = (1 << 12),
+ GET_STATE = (1 << 13),
+ GET_ERROR = (1 << 14),
+ SKIP_GONE_DEVS = (1 << 15),
+};
/* If fd >= 0, get the array it is open on,
* else use devnum. >=0 -> major9. <0.....
*/
+extern int sysfs_open(int devnum, char *devname, char *attr);
+extern void sysfs_init(struct mdinfo *mdi, int fd, int devnum);
extern void sysfs_free(struct mdinfo *sra);
extern struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options);
+extern int sysfs_attr_match(const char *attr, const char *str);
+extern int sysfs_match_word(const char *word, char **list);
extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev,
char *name, char *val);
extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev,
char *name, unsigned long long val);
+extern int sysfs_uevent(struct mdinfo *sra, char *event);
extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev,
char *name, unsigned long long *val);
+extern int sysfs_get_str(struct mdinfo *sra, struct mdinfo *dev,
+ char *name, char *val, int size);
+extern int sysfs_set_safemode(struct mdinfo *sra, unsigned long ms);
+extern int sysfs_set_array(struct mdinfo *info, int vers);
+extern int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd,
+ int in_sync);
+extern int sysfs_disk_to_scsi_id(int fd, __u32 *id);
+extern int sysfs_unique_holder(int devnum, long rdev);
+extern int load_sys(char *path, char *buf);
extern int save_stripes(int *source, unsigned long long *offsets,
extern char *map_num(mapping_t *map, int num);
extern int map_name(mapping_t *map, char *name);
-extern mapping_t r5layout[], pers[], modes[], faultylayout[];
+extern mapping_t r5layout[], r6layout[], pers[], modes[], faultylayout[];
extern char *map_dev(int major, int minor, int create);
+struct active_array;
+struct metadata_update;
+/* A superswitch provides entry point the a metadata handler.
+ *
+ * The super_switch primarily operates on some "metadata" that
+ * is accessed via the 'supertype'.
+ * This metadata has one of three possible sources.
+ * 1/ It is read from a single device. In this case it may not completely
+ * describe the array or arrays as some information might be on other
+ * devices.
+ * 2/ It is read from all devices in a container. In this case all
+ * information is present.
+ * 3/ It is created by ->init_super / ->add_to_super. In this case it will
+ * be complete once enough ->add_to_super calls have completed.
+ *
+ * When creating an array inside a container, the metadata will be
+ * formed by a combination of 2 and 3. The metadata or the array is read,
+ * then new information is added.
+ *
+ * The metadata must sometimes have a concept of a 'current' array
+ * and a 'current' device.
+ * The 'current' array is set by init_super to be the newly created array,
+ * or is set by super_by_fd when it finds it is looking at an array inside
+ * a container.
+ *
+ * The 'current' device is either the device that the metadata was read from
+ * in case 1, or the last device added by add_to_super in case 3.
+ * Case 2 does not identify a 'current' device.
+ */
extern struct superswitch {
+
+ /* Used to report details of metadata read from a component
+ * device. ->load_super has been called.
+ */
void (*examine_super)(struct supertype *st, char *homehost);
- void (*brief_examine_super)(struct supertype *st);
+ void (*brief_examine_super)(struct supertype *st, int verbose);
void (*export_examine_super)(struct supertype *st);
+
+ /* Used to report details of an active array.
+ * ->load_super was possibly given a 'component' string.
+ */
void (*detail_super)(struct supertype *st, char *homehost);
void (*brief_detail_super)(struct supertype *st);
void (*export_detail_super)(struct supertype *st);
+
+ /* Optional: platform hardware / firmware details */
+ int (*detail_platform)(int verbose, int enumerate_only);
+
+ /* Used:
+ * to get uuid to storing in bitmap metadata
+ * and 'reshape' backup-data metadata
+ * To see if a device is being re-added to an array it was part of.
+ */
void (*uuid_from_super)(struct supertype *st, int uuid[4]);
+
+ /* Extract generic details from metadata. This could be details about
+ * the container, or about an individual array within the container.
+ * The determination is made either by:
+ * load_super being given a 'component' string.
+ * validate_geometry determining what to create.
+ * The info includes both array information and device information.
+ * The particular device should be:
+ * The last device added by add_to_super
+ * The device the metadata was loaded from by load_super
+ */
void (*getinfo_super)(struct supertype *st, struct mdinfo *info);
+
+ /* Check if the given metadata is flagged as belonging to "this"
+ * host. 0 for 'no', 1 for 'yes', -1 for "Don't record homehost"
+ */
int (*match_home)(struct supertype *st, char *homehost);
+
+ /* Make one of several generic modifications to metadata
+ * prior to assembly (or other times).
+ * sparc2.2 - first bug in early 0.90 metadata
+ * super-minor - change name of 0.90 metadata
+ * summaries - 'correct' any redundant data
+ * resync - mark array as dirty to trigger a resync.
+ * uuid - set new uuid - only 0.90 or 1.x
+ * name - change the name of the array (where supported)
+ * homehost - change which host this array is tied to.
+ * devicesize - If metadata is at start of device, change recorded
+ * device size to match actual device size
+ * byteorder - swap bytes for 0.90 metadata
+ *
+ * force-one - mark that device as uptodate, not old or failed.
+ * force-array - mark array as clean if it would not otherwise
+ * assemble
+ * assemble - not sure how this is different from force-one...
+ * linear-grow-new - add a new device to a linear array, but don't
+ * change the size: so superblock still matches
+ * linear-grow-update - now change the size of the array.
+ */
int (*update_super)(struct supertype *st, struct mdinfo *info,
char *update,
char *devname, int verbose,
int uuid_set, char *homehost);
+
+ /* Create new metadata for new array as described. This could
+ * be a new container, or an array in a pre-existing container.
+ * Also used to zero metadata prior to writing it to invalidate old
+ * metadata.
+ */
int (*init_super)(struct supertype *st, mdu_array_info_t *info,
unsigned long long size, char *name,
char *homehost, int *uuid);
- void (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo);
+
+ /* update the metadata to include new device, either at create or
+ * when hot-adding a spare.
+ */
+ int (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo,
+ int fd, char *devname);
+
+ /* Write metadata to one device when fixing problems or adding
+ * a new device.
+ */
int (*store_super)(struct supertype *st, int fd);
- int (*write_init_super)(struct supertype *st, mdu_disk_info_t *dinfo,
- char *devname);
+
+ /* Write all metadata for this array.
+ */
+ int (*write_init_super)(struct supertype *st);
int (*compare_super)(struct supertype *st, struct supertype *tst);
int (*load_super)(struct supertype *st, int fd, char *devname);
struct supertype * (*match_metadata_desc)(char *arg);
void (*locate_bitmap)(struct supertype *st, int fd);
int (*write_bitmap)(struct supertype *st, int fd);
void (*free_super)(struct supertype *st);
- int major;
+
+ /* 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.
+ * Both 'size' and '*freesize' are in sectors. chunk is bytes.
+ */
+ int (*validate_geometry)(struct supertype *st, int level, int layout,
+ int raiddisks,
+ int chunk, unsigned long long size,
+ char *subdev, unsigned long long *freesize,
+ int verbose);
+
+ struct mdinfo *(*container_content)(struct supertype *st);
+ /* Allow a metadata handler to override mdadm's default layouts */
+ int (*default_layout)(int level); /* optional */
+
+/* for mdmon */
+ int (*open_new)(struct supertype *c, struct active_array *a,
+ char *inst);
+
+ /* Tell the metadata handler the current state of the array.
+ * This covers whether it is known to be consistent (no pending writes)
+ * and how far along a resync is known to have progressed
+ * (in a->resync_start).
+ * resync status is really irrelevant if the array is not consistent,
+ * but some metadata (DDF!) have a place to record the distinction.
+ * If 'consistent' is '2', then the array can mark it dirty if a
+ * resync/recovery/whatever is required, or leave it clean if not.
+ * Return value is 0 dirty (not consistent) and 1 if clean.
+ * it is only really important if consistent is passed in as '2'.
+ */
+ int (*set_array_state)(struct active_array *a, int consistent);
+
+ /* When the state of a device might have changed, we call set_disk to
+ * tell the metadata what the current state is.
+ * Typically this happens on spare->in_sync and (spare|in_sync)->faulty
+ * transitions.
+ * set_disk might be called when the state of the particular disk has
+ * not in fact changed.
+ */
+ void (*set_disk)(struct active_array *a, int n, int state);
+ 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.
+ * On success, it add appropriate updates (For process_update) to
+ * to the 'updates' list and returns a list of 'mdinfo' identifying
+ * the device, or devices as there might be multiple missing
+ * devices and multiple spares available.
+ */
+ struct mdinfo *(*activate_spare)(struct active_array *a,
+ struct metadata_update **updates);
+
int swapuuid; /* true if uuid is bigending rather than hostendian */
-} super0, super1, *superlist[];
+ int external;
+ const char *name; /* canonical metadata name */
+} super0, super1, super_ddf, *superlist[];
+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.
+ * metadata read in or created is stored in 'sb' and 'info'.
+ * There are also fields used by mdmon to track containers.
+ *
+ * A supertype may refer to:
+ * Just an array, possibly in a container
+ * A container, not identifying any particular array
+ * Info read from just one device, not yet fully describing the array/container.
+ *
+ *
+ * A supertype is created by:
+ * super_by_fd
+ * guess_super
+ * dup_super
+ */
struct supertype {
struct superswitch *ss;
int minor_version;
int max_devs;
+ int container_dev; /* devnum of container */
+ char subarray[32]; /* name of array inside container */
void *sb;
+ void *info;
+ int loaded_container; /* Set if load_super found a container,
+ * not just one device */
+
+ 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 devnum;
+ char *devname; /* e.g. md0. This appears in metadata_verison:
+ * external:/md0/12
+ */
+ int devcnt;
+
+ struct mdinfo *devs;
+
};
extern struct supertype *super_by_fd(int fd);
extern int get_dev_size(int fd, char *dname, unsigned long long *sizep);
extern void get_one_disk(int mdfd, mdu_array_info_t *ainf,
mdu_disk_info_t *disk);
+void wait_for(char *dev, int fd);
#if __GNUC__ < 3
struct stat64;
#define HAVE_NFTW we assume
#define HAVE_FTW
-#ifdef UCLIBC
+#ifdef __UCLIBC__
# include <features.h>
+# ifndef __UCLIBC_HAS_LFS__
+# define lseek64 lseek
+# endif
# ifndef __UCLIBC_HAS_FTW__
# undef HAVE_FTW
# undef HAVE_NFTW
int *fdlist, int cnt, char *backup_file);
-extern int Assemble(struct supertype *st, char *mddev, int mdfd,
+extern int Assemble(struct supertype *st, char *mddev,
mddev_ident_t ident,
mddev_dev_t devlist, char *backup_file,
int readonly, int runstop,
- char *update, char *homehost,
+ char *update, char *homehost, int require_homehost,
int verbose, int force);
-extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
- int raiddisks,
- mddev_dev_t devlist, int assume_clean,
- char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);
+extern int Build(char *mddev, int chunk, int level, int layout,
+ int raiddisks, mddev_dev_t devlist, int assume_clean,
+ char *bitmap_file, int bitmap_chunk, int write_behind,
+ int delay, int verbose, int autof, unsigned long long size);
-extern int Create(struct supertype *st, char *mddev, int mdfd,
+extern int Create(struct supertype *st, char *mddev,
int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
char *name, char *homehost, int *uuid,
int subdevs, mddev_dev_t devlist,
int runstop, int verbose, int force, int assume_clean,
- char *bitmap_file, int bitmap_chunk, int write_behind, int delay);
+ char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int autof);
extern int Detail(char *dev, int brief, int export, int test, char *homehost);
+extern int Detail_Platform(struct superswitch *ss, int scan, int verbose);
extern int Query(char *dev);
extern int Examine(mddev_dev_t devlist, int brief, int export, int scan,
int SparcAdjust, struct supertype *forcest, char *homehost);
int period, int daemonise, int scan, int oneshot,
int dosyslog, int test, char *pidfile);
-extern int Kill(char *dev, int force, int quiet);
+extern int Kill(char *dev, int force, int quiet, int noexcl);
extern int Wait(char *dev);
+extern int WaitClean(char *dev, int verbose);
extern int Incremental(char *devname, int verbose, int runstop,
- struct supertype *st, char *homehost, int autof);
+ struct supertype *st, char *homehost, int require_homehost,
+ int autof);
+extern int Incremental_container(struct supertype *st, char *devname,
+ int verbose, int runstop, int autof,
+ int trustworthy);
extern void RebuildMap(void);
extern int IncrementalScan(int verbose);
extern int md_get_version(int fd);
extern int get_linux_version(void);
+extern long long parse_size(char *size);
extern int parse_uuid(char *str, int uuid[4]);
+extern int parse_layout_10(char *layout);
+extern int parse_layout_faulty(char *layout);
extern int check_ext2(int fd, char *name);
extern int check_reiser(int fd, char *name);
extern int check_raid(int fd, char *name);
extern int get_mdp_major(void);
extern int dev_open(char *dev, int flags);
+extern int open_dev(int devnum);
+extern int open_dev_excl(int devnum);
extern int is_standard(char *dev, int *nump);
+extern int same_dev(char *one, char *two);
extern int parse_auto(char *str, char *msg, int config);
extern mddev_ident_t conf_get_ident(char *dev);
extern mddev_dev_t conf_get_devs(void);
extern int conf_test_dev(char *devname);
+extern int conf_test_metadata(const char *version);
extern struct createinfo *conf_get_create_info(void);
extern void set_conffile(char *file);
extern char *conf_get_mailaddr(void);
extern char *conf_get_mailfrom(void);
extern char *conf_get_program(void);
-extern char *conf_get_homehost(void);
+extern char *conf_get_homehost(int *require_homehostp);
extern char *conf_line(FILE *file);
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_s *conf_match(struct mdinfo *info, struct supertype *st);
+
extern void free_line(char *line);
extern int match_oneof(char *devices, char *devname);
extern void uuid_from_super(int uuid[4], mdp_super_t *super);
+extern const int uuid_match_any[4];
extern int same_uuid(int a[4], int b[4], int swapuuid);
extern void copy_uuid(void *a, int b[4], int swapuuid);
+extern char *fname_from_uuid(struct supertype *st,
+ struct mdinfo *info, char *buf, char sep);
extern unsigned long calc_csum(void *super, int bytes);
extern int enough(int level, int raid_disks, int layout, int clean,
char *avail, int avail_disks);
extern int ask(char *mesg);
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 int assemble_container_content(struct supertype *st, int mdfd,
+ struct mdinfo *content, int runstop,
+ char *chosen_name, int verbose);
+
+extern int add_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);
extern char *human_size(long long bytes);
extern char *human_size_brief(long long bytes);
extern char DefaultConfFile[];
-extern int open_mddev(char *dev, int autof);
-extern int open_mddev_devnum(char *devname, int devnum, char *name,
- char *chosen_name, int parts);
-
+extern int create_mddev(char *dev, char *name, int autof, int trustworthy,
+ char *chosen);
+/* values for 'trustworthy' */
+#define LOCAL 1
+#define FOREIGN 2
+#define METADATA 3
+extern int open_mddev(char *dev, int report_errors);
+extern int open_container(int fd);
+
+extern int mdmon_running(int devnum);
+extern int signal_mdmon(int devnum);
+extern int check_env(char *name);
+extern int start_mdmon(int devnum);
+
+extern char *devnum2devname(int num);
+extern int devname2devnum(char *name);
+extern int stat2devnum(struct stat *st);
+extern int fd2devnum(int fd);
+
+static inline int dev2major(int d)
+{
+ if (d >= 0)
+ return MD_MAJOR;
+ else
+ return get_mdp_major();
+}
+
+static inline int dev2minor(int d)
+{
+ if (d >= 0)
+ return d;
+ return (-1-d) << MdpMinorShift;
+}
+
+static inline int ROUND_UP(int a, int base)
+{
+ return ((a+base-1)/base)*base;
+}
+
+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 is e.g. md0, md_d1
+ * componentname is dependant on the metadata. e.g. '1' 'S1' ...
+ */
+ return (*vers == '/' || *vers == '-');
+}
+
+#ifdef DEBUG
+#define dprintf(fmt, arg...) \
+ fprintf(stderr, fmt, ##arg)
+#else
+#define dprintf(fmt, arg...) \
+ ({ if (0) fprintf(stderr, fmt, ##arg); 0; })
+#endif
+#include <assert.h>
+#include <stdarg.h>
+static inline int xasprintf(char **strp, const char *fmt, ...) {
+ va_list ap;
+ int ret;
+ va_start(ap, fmt);
+ ret = vasprintf(strp, fmt, ap);
+ va_end(ap);
+ assert(ret >= 0);
+ return ret;
+}
#define LEVEL_MULTIPATH (-4)
#define LEVEL_LINEAR (-1)
#define LEVEL_FAULTY (-5)
+/* kernel module doesn't know about these */
+#define LEVEL_CONTAINER (-100)
+#define LEVEL_UNSUPPORTED (-200)
+
/* faulty stuff */
#define makedev(M,m) (((M)<<8) | (m))
#endif
-/* for raid5 */
+/* for raid4/5/6 */
#define ALGORITHM_LEFT_ASYMMETRIC 0
#define ALGORITHM_RIGHT_ASYMMETRIC 1
#define ALGORITHM_LEFT_SYMMETRIC 2
#define ALGORITHM_RIGHT_SYMMETRIC 3
+
+/* Define non-rotating (raid4) algorithms. These allow
+ * conversion of raid4 to raid5.
+ */
+#define ALGORITHM_PARITY_0 4 /* P or P,Q are initial devices */
+#define ALGORITHM_PARITY_N 5 /* P or P,Q are final devices. */
+
+/* DDF RAID6 layouts differ from md/raid6 layouts in two ways.
+ * Firstly, the exact positioning of the parity block is slightly
+ * different between the 'LEFT_*' modes of md and the "_N_*" modes
+ * of DDF.
+ * Secondly, or order of datablocks over which the Q syndrome is computed
+ * is different.
+ * Consequently we have different layouts for DDF/raid6 than md/raid6.
+ * These layouts are from the DDFv1.2 spec.
+ * Interestingly DDFv1.2-Errata-A does not specify N_CONTINUE but
+ * leaves RLQ=3 as 'Vendor Specific'
+ */
+
+#define ALGORITHM_ROTATING_ZERO_RESTART 8 /* DDF PRL=6 RLQ=1 */
+#define ALGORITHM_ROTATING_N_RESTART 9 /* DDF PRL=6 RLQ=2 */
+#define ALGORITHM_ROTATING_N_CONTINUE 10 /*DDF PRL=6 RLQ=3 */
+
+
+/* For every RAID5 algorithm we define a RAID6 algorithm
+ * with exactly the same layout for data and parity, and
+ * with the Q block always on the last device (N-1).
+ * This allows trivial conversion from RAID5 to RAID6
+ */
+#define ALGORITHM_LEFT_ASYMMETRIC_6 16
+#define ALGORITHM_RIGHT_ASYMMETRIC_6 17
+#define ALGORITHM_LEFT_SYMMETRIC_6 18
+#define ALGORITHM_RIGHT_SYMMETRIC_6 19
+#define ALGORITHM_PARITY_0_6 20
+#define ALGORITHM_PARITY_N_6 ALGORITHM_PARITY_N
+
projects / thirdparty / mdadm.git / blobdiff