Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754648AbcL3W6X (ORCPT ); Fri, 30 Dec 2016 17:58:23 -0500 Received: from mo4-p00-ob.smtp.rzone.de ([81.169.146.217]:20647 "EHLO mo4-p00-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754611AbcL3W6R (ORCPT ); Fri, 30 Dec 2016 17:58:17 -0500 X-RZG-AUTH: :OH8QVVOrc/CP6za/qRmbF3BWedPGA1vjs2ejZCzW8NRdwTYefHi0L5RzHLEjAZn5asq7vKs= X-RZG-CLASS-ID: mo00 From: Thomas Schoebel-Theuer To: linux-kernel@vger.kernel.org, tst@schoebel-theuer.de Subject: [RFC 24/32] mars: add new module strategy Date: Fri, 30 Dec 2016 23:57:50 +0100 Message-Id: <71de7c5ec1f2f7ecc2ceee4817d2718bd1d15bca.1483138400.git.tst@schoebel-theuer.de> X-Mailer: git-send-email 2.11.0 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 8463 Lines: 253 Signed-off-by: Thomas Schoebel-Theuer --- drivers/staging/mars/mars/strategy.h | 239 +++++++++++++++++++++++++++++++++++ 1 file changed, 239 insertions(+) create mode 100644 drivers/staging/mars/mars/strategy.h diff --git a/drivers/staging/mars/mars/strategy.h b/drivers/staging/mars/mars/strategy.h new file mode 100644 index 000000000000..d570772847c2 --- /dev/null +++ b/drivers/staging/mars/mars/strategy.h @@ -0,0 +1,239 @@ +/* + * MARS Long Distance Replication Software + * + * Copyright (C) 2010-2014 Thomas Schoebel-Theuer + * Copyright (C) 2011-2014 1&1 Internet AG + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +/* OLD CODE = > will disappear! */ +#ifndef _OLD_STRATEGY +#define _OLD_STRATEGY + +#define _STRATEGY /* call this only in strategy bricks, never in ordinary bricks */ + +#include + +#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; + +#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; \ + /* from readdir() = > often DT_UNKNOWN */ \ + /* don't rely on it - use stat_val.mode instead */ \ + unsigned int d_type; \ + 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 + +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 void mars_sync(void); +extern int mars_mkdir(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 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 main_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 -- 2.11.0