[PATCH 39/50] mars: add new file include/linux/mars_light/light_strategy.h

Thomas Schoebel-Theuer
2014-07-01T21:51:29Z

include/linux/mars_light/light_strategy.h | 224 ++++++++++++++++++++++++++++++
1 file changed, 224 insertions(+)
create mode 100644 include/linux/mars_light/light_strategy.h

diff --git a/include/linux/mars_light/light_strategy.h b/include/linux/mars_light/light_strategy.h
new file mode 100644
index 0000000..b483381
--- /dev/null
+++ b/include/linux/mars_light/light_strategy.h
@@ -0,0 +1,224 @@
+/* (c) 2010 Thomas Schoebel-Theuer / 1&1 Internet AG */
+/* OLD CODE => will disappear! */
+#ifndef _OLD_STRATEGY
+#define _OLD_STRATEGY
+
+#define _STRATEGY /* call this only in strategy bricks, never in ordinary bricks */
+
+#include <linux/xio.h>
+
+#define MARS_ARGV_MAX 4
+
+extern loff_t global_total_space;
+extern loff_t global_remaining_space;
+
+extern int global_logrot_auto;
+extern int global_free_space_0;
+extern int global_free_space_1;
+extern int global_free_space_2;
+extern int global_free_space_3;
+extern int global_free_space_4;
+extern int global_sync_want;
+extern int global_sync_nr;
+extern int global_sync_limit;
+extern int mars_rollover_interval;
+extern int mars_scan_interval;
+extern int mars_propagate_interval;
+extern int mars_sync_flip_interval;
+extern int mars_peer_abort;
+extern int mars_emergency_mode;
+extern int mars_reset_emergency;
+extern int mars_keep_msg;
+
+extern int mars_fast_fullsync;
+
+extern char *my_id(void);
+
+#define MARS_DENT(TYPE) \
+ struct list_head dent_link; \
+ struct list_head brick_list; \
+ struct TYPE *d_parent; \
+ char *d_argv[MARS_ARGV_MAX]; /* for internal use, will be automatically deallocated*/\
+ char *d_args; /* ditto uninterpreted */ \
+ char *d_name; /* current path component */ \
+ char *d_rest; /* some "meaningful" rest of d_name*/ \
+ char *d_path; /* full absolute path */ \
+ struct say_channel *d_say_channel; /* for messages */ \
+ loff_t d_corr_A; /* logical size correction */ \
+ loff_t d_corr_B; /* logical size correction */ \
+ int d_depth; \
+ unsigned int d_type; /* from readdir() => often DT_UNKNOWN => don't rely on it, use stat_val.mode instead */\
+ int d_class; /* for pre-grouping order */ \
+ int d_serial; /* for pre-grouping order */ \
+ int d_version; /* dynamic programming per call of mars_ent_work() */\
+ int d_child_count; \
+ bool d_killme; \
+ bool d_use_channel; \
+ struct kstat stat_val; \
+ char *link_val; \
+ struct mars_global *d_global; \
+ void (*d_private_destruct)(void *private); \
+ void *d_private; \
+ /* this comment is for keeping TRAILING_SEMICOLON happy */
+
+struct mars_dent {
+ MARS_DENT(mars_dent);
+};
+
+extern const struct meta mars_kstat_meta[];
+extern const struct meta mars_dent_meta[];
+
+struct mars_global {
+ struct rw_semaphore dent_mutex;
+ struct rw_semaphore brick_mutex;
+ struct generic_switch global_power;
+ struct list_head dent_anchor;
+ struct list_head brick_anchor;
+
+ wait_queue_head_t main_event;
+ int global_version;
+ int deleted_my_border;
+ int deleted_border;
+ int deleted_min;
+ bool main_trigger;
+};
+
+extern void bind_to_dent(struct mars_dent *dent, struct say_channel **ch);
+
+typedef int (*mars_dent_checker_fn)(struct mars_dent *parent,
+ const char *name,
+ int namlen,
+ unsigned int d_type,
+ int *prefix,
+ int *serial,
+ bool *use_channel);
+
+typedef int (*mars_dent_worker_fn)(struct mars_global *global, struct mars_dent *dent, bool prepare, bool direction);
+
+extern int mars_dent_work(struct mars_global *global,
+ char *dirname,
+ int allocsize,
+
+ mars_dent_checker_fn checker,
+ mars_dent_worker_fn worker,
+ void *buf,
+ int maxdepth);
+
+extern struct mars_dent *_mars_find_dent(struct mars_global *global, const char *path);
+extern struct mars_dent *mars_find_dent(struct mars_global *global, const char *path);
+extern int mars_find_dent_all(struct mars_global *global, char *prefix, struct mars_dent ***table);
+extern void xio_kill_dent(struct mars_dent *dent);
+extern void xio_free_dent(struct mars_dent *dent);
+extern void xio_free_dent_all(struct mars_global *global, struct list_head *anchor);
+
+/* low-level brick instantiation */
+
+extern struct xio_brick *mars_find_brick(struct mars_global *global, const void *brick_type, const char *path);
+extern struct xio_brick *xio_make_brick(struct mars_global *global,
+ struct mars_dent *belongs,
+ const void *_brick_type,
+ const char *path,
+ const char *name);
+
+extern int xio_free_brick(struct xio_brick *brick);
+extern int xio_kill_brick(struct xio_brick *brick);
+extern int xio_kill_brick_all(struct mars_global *global, struct list_head *anchor, bool use_dent_link);
+extern int xio_kill_brick_when_possible(struct mars_global *global,
+ struct list_head *anchor,
+ bool use_dent_link,
+ const struct xio_brick_type *type,
+ bool even_on);
+
+/* mid-level brick instantiation (identity is based on path strings) */
+
+extern char *_vpath_make(int line, const char *fmt, va_list *args);
+extern char *_path_make(int line, const char *fmt, ...);
+extern char *_backskip_replace(int line, const char *path, char delim, bool insert, const char *fmt, ...);
+
+#define vpath_make(_fmt, _args) \
+ _vpath_make(__LINE__, _fmt, _args)
+#define path_make(_fmt, _args...) \
+ _path_make(__LINE__, _fmt, ##_args)
+#define backskip_replace(_path, _delim, _insert, _fmt, _args...) \
+ _backskip_replace(__LINE__, _path, _delim, _insert, _fmt, ##_args)
+
+extern struct xio_brick *path_find_brick(struct mars_global *global, const void *brick_type, const char *fmt, ...);
+
+/* Create a new brick and connect its inputs to a set of predecessors.
+ * When @timeout > 0, switch on the brick as well as its predecessors.
+ */
+extern struct xio_brick *make_brick_all(
+ struct mars_global *global,
+ struct mars_dent *belongs,
+ int (*setup_fn)(struct xio_brick *brick, void *private),
+ void *private,
+ const char *new_name,
+ const struct generic_brick_type *new_brick_type,
+ const struct generic_brick_type *prev_brick_type[],
+/* -1 = off, 0 = leave in current state, +1 = create when necessary, +2 = create + switch on */
+ int switch_override,
+ const char *new_fmt,
+ const char *prev_fmt[],
+ int prev_count,
+ ...
+ );
+
+/* general MARS infrastructure */
+
+/* General fs wrappers (for abstraction)
+ */
+extern int mars_stat(const char *path, struct kstat *stat, bool use_lstat);
+extern int mars_mkdir(const char *path);
+extern int mars_rmdir(const char *path);
+extern int mars_unlink(const char *path);
+extern int mars_symlink(const char *oldpath, const char *newpath, const struct timespec *stamp, uid_t uid);
+extern char *mars_readlink(const char *newpath);
+extern int mars_rename(const char *oldpath, const char *newpath);
+extern int mars_chmod(const char *path, mode_t mode);
+extern int mars_lchown(const char *path, uid_t uid);
+extern void mars_remaining_space(const char *fspath, loff_t *total, loff_t *remaining);
+
+/***********************************************************************/
+
+extern struct mars_global *mars_global;
+
+extern bool xio_check_inputs(struct xio_brick *brick);
+extern bool xio_check_outputs(struct xio_brick *brick);
+
+extern int mars_power_button(struct xio_brick *brick, bool val, bool force_off);
+
+/***********************************************************************/
+
+/* statistics */
+
+extern int global_show_statist;
+
+void show_statistics(struct mars_global *global, const char *class);
+
+/***********************************************************************/
+
+/* quirk */
+
+extern int mars_mem_percent;
+
+extern int external_checker(struct mars_dent *parent,
+ const char *_name,
+ int namlen,
+ unsigned int d_type,
+ int *prefix,
+ int *serial,
+ bool *use_channel);
+
+void from_remote_trigger(void);
+
+/***********************************************************************/
+
+/* init */
+
+extern int init_sy(void);
+extern void exit_sy(void);
+
+extern int init_sy_net(void);
+extern void exit_sy_net(void);
+
+#endif
--
2.0.0