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https://github.com/torvalds/linux.git
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dm mpath: switch from 'unsigned' to 'bool' for flags where appropriate
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mike Snitzer
parent
b0b477c7e0
commit
be7d31cca8
@ -34,11 +34,12 @@ struct pgpath {
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struct list_head list;
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struct priority_group *pg; /* Owning PG */
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unsigned is_active; /* Path status */
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unsigned fail_count; /* Cumulative failure count */
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struct dm_path path;
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struct delayed_work activate_path;
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bool is_active:1; /* Path status */
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};
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#define path_to_pgpath(__pgp) container_of((__pgp), struct pgpath, path)
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@ -54,10 +55,10 @@ struct priority_group {
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struct path_selector ps;
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unsigned pg_num; /* Reference number */
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unsigned bypassed; /* Temporarily bypass this PG? */
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unsigned nr_pgpaths; /* Number of paths in PG */
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struct list_head pgpaths;
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bool bypassed:1; /* Temporarily bypass this PG? */
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};
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/* Multipath context */
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@ -75,20 +76,20 @@ struct multipath {
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wait_queue_head_t pg_init_wait; /* Wait for pg_init completion */
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unsigned pg_init_required; /* pg_init needs calling? */
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unsigned pg_init_in_progress; /* Only one pg_init allowed at once */
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unsigned pg_init_delay_retry; /* Delay pg_init retry? */
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unsigned nr_valid_paths; /* Total number of usable paths */
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struct pgpath *current_pgpath;
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struct priority_group *current_pg;
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struct priority_group *next_pg; /* Switch to this PG if set */
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unsigned queue_io:1; /* Must we queue all I/O? */
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unsigned queue_if_no_path:1; /* Queue I/O if last path fails? */
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unsigned saved_queue_if_no_path:1; /* Saved state during suspension */
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unsigned retain_attached_hw_handler:1; /* If there's already a hw_handler present, don't change it. */
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unsigned pg_init_disabled:1; /* pg_init is not currently allowed */
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bool queue_io:1; /* Must we queue all I/O? */
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bool queue_if_no_path:1; /* Queue I/O if last path fails? */
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bool saved_queue_if_no_path:1; /* Saved state during suspension */
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bool retain_attached_hw_handler:1; /* If there's already a hw_handler present, don't change it. */
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bool pg_init_disabled:1; /* pg_init is not currently allowed */
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bool pg_init_required:1; /* pg_init needs calling? */
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bool pg_init_delay_retry:1; /* Delay pg_init retry? */
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unsigned pg_init_retries; /* Number of times to retry pg_init */
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unsigned pg_init_count; /* Number of times pg_init called */
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@ -132,7 +133,7 @@ static struct pgpath *alloc_pgpath(void)
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struct pgpath *pgpath = kzalloc(sizeof(*pgpath), GFP_KERNEL);
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if (pgpath) {
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pgpath->is_active = 1;
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pgpath->is_active = true;
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INIT_DELAYED_WORK(&pgpath->activate_path, activate_path);
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}
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@ -189,7 +190,7 @@ static struct multipath *alloc_multipath(struct dm_target *ti, bool use_blk_mq)
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if (m) {
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INIT_LIST_HEAD(&m->priority_groups);
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spin_lock_init(&m->lock);
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m->queue_io = 1;
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m->queue_io = true;
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m->pg_init_delay_msecs = DM_PG_INIT_DELAY_DEFAULT;
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INIT_WORK(&m->trigger_event, trigger_event);
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init_waitqueue_head(&m->pg_init_wait);
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@ -278,7 +279,7 @@ static int __pg_init_all_paths(struct multipath *m)
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return 0;
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m->pg_init_count++;
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m->pg_init_required = 0;
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m->pg_init_required = false;
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/* Check here to reset pg_init_required */
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if (!m->current_pg)
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@ -304,11 +305,11 @@ static void __switch_pg(struct multipath *m, struct pgpath *pgpath)
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/* Must we initialise the PG first, and queue I/O till it's ready? */
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if (m->hw_handler_name) {
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m->pg_init_required = 1;
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m->queue_io = 1;
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m->pg_init_required = true;
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m->queue_io = true;
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} else {
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m->pg_init_required = 0;
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m->queue_io = 0;
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m->pg_init_required = false;
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m->queue_io = false;
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}
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m->pg_init_count = 0;
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@ -334,10 +335,10 @@ static int __choose_path_in_pg(struct multipath *m, struct priority_group *pg,
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static void __choose_pgpath(struct multipath *m, size_t nr_bytes)
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{
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struct priority_group *pg;
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unsigned bypassed = 1;
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bool bypassed = true;
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if (!m->nr_valid_paths) {
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m->queue_io = 0;
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m->queue_io = false;
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goto failed;
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}
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@ -365,7 +366,7 @@ static void __choose_pgpath(struct multipath *m, size_t nr_bytes)
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continue;
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if (!__choose_path_in_pg(m, pg, nr_bytes)) {
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if (!bypassed)
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m->pg_init_delay_retry = 1;
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m->pg_init_delay_retry = true;
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return;
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}
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}
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@ -496,8 +497,8 @@ static void multipath_release_clone(struct request *clone)
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/*
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* If we run out of usable paths, should we queue I/O or error it?
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*/
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static int queue_if_no_path(struct multipath *m, unsigned queue_if_no_path,
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unsigned save_old_value)
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static int queue_if_no_path(struct multipath *m, bool queue_if_no_path,
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bool save_old_value)
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{
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unsigned long flags;
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@ -803,12 +804,12 @@ static int parse_features(struct dm_arg_set *as, struct multipath *m)
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argc--;
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if (!strcasecmp(arg_name, "queue_if_no_path")) {
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r = queue_if_no_path(m, 1, 0);
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r = queue_if_no_path(m, true, false);
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continue;
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}
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if (!strcasecmp(arg_name, "retain_attached_hw_handler")) {
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m->retain_attached_hw_handler = 1;
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m->retain_attached_hw_handler = true;
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continue;
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}
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@ -947,7 +948,7 @@ static void flush_multipath_work(struct multipath *m)
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unsigned long flags;
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spin_lock_irqsave(&m->lock, flags);
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m->pg_init_disabled = 1;
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m->pg_init_disabled = true;
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spin_unlock_irqrestore(&m->lock, flags);
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flush_workqueue(kmpath_handlerd);
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@ -956,7 +957,7 @@ static void flush_multipath_work(struct multipath *m)
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flush_work(&m->trigger_event);
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spin_lock_irqsave(&m->lock, flags);
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m->pg_init_disabled = 0;
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m->pg_init_disabled = false;
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spin_unlock_irqrestore(&m->lock, flags);
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}
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@ -984,7 +985,7 @@ static int fail_path(struct pgpath *pgpath)
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DMWARN("Failing path %s.", pgpath->path.dev->name);
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pgpath->pg->ps.type->fail_path(&pgpath->pg->ps, &pgpath->path);
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pgpath->is_active = 0;
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pgpath->is_active = false;
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pgpath->fail_count++;
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m->nr_valid_paths--;
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@ -1028,7 +1029,7 @@ static int reinstate_path(struct pgpath *pgpath)
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if (r)
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goto out;
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pgpath->is_active = 1;
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pgpath->is_active = true;
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if (!m->nr_valid_paths++) {
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m->current_pgpath = NULL;
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@ -1075,7 +1076,7 @@ static int action_dev(struct multipath *m, struct dm_dev *dev,
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* Temporarily try to avoid having to use the specified PG
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*/
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static void bypass_pg(struct multipath *m, struct priority_group *pg,
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int bypassed)
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bool bypassed)
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{
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unsigned long flags;
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@ -1108,7 +1109,7 @@ static int switch_pg_num(struct multipath *m, const char *pgstr)
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spin_lock_irqsave(&m->lock, flags);
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list_for_each_entry(pg, &m->priority_groups, list) {
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pg->bypassed = 0;
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pg->bypassed = false;
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if (--pgnum)
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continue;
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@ -1126,7 +1127,7 @@ static int switch_pg_num(struct multipath *m, const char *pgstr)
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* Set/clear bypassed status of a PG.
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* PGs are numbered upwards from 1 in the order they were declared.
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*/
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static int bypass_pg_num(struct multipath *m, const char *pgstr, int bypassed)
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static int bypass_pg_num(struct multipath *m, const char *pgstr, bool bypassed)
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{
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struct priority_group *pg;
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unsigned pgnum;
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@ -1150,17 +1151,17 @@ static int bypass_pg_num(struct multipath *m, const char *pgstr, int bypassed)
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/*
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* Should we retry pg_init immediately?
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*/
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static int pg_init_limit_reached(struct multipath *m, struct pgpath *pgpath)
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static bool pg_init_limit_reached(struct multipath *m, struct pgpath *pgpath)
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{
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unsigned long flags;
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int limit_reached = 0;
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bool limit_reached = false;
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spin_lock_irqsave(&m->lock, flags);
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if (m->pg_init_count <= m->pg_init_retries && !m->pg_init_disabled)
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m->pg_init_required = 1;
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m->pg_init_required = true;
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else
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limit_reached = 1;
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limit_reached = true;
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spin_unlock_irqrestore(&m->lock, flags);
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@ -1173,7 +1174,7 @@ static void pg_init_done(void *data, int errors)
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struct priority_group *pg = pgpath->pg;
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struct multipath *m = pg->m;
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unsigned long flags;
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unsigned delay_retry = 0;
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bool delay_retry = false;
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/* device or driver problems */
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switch (errors) {
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@ -1196,7 +1197,7 @@ static void pg_init_done(void *data, int errors)
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* Probably doing something like FW upgrade on the
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* controller so try the other pg.
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*/
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bypass_pg(m, pg, 1);
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bypass_pg(m, pg, true);
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break;
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case SCSI_DH_RETRY:
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/* Wait before retrying. */
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@ -1224,7 +1225,7 @@ static void pg_init_done(void *data, int errors)
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m->current_pg = NULL;
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}
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} else if (!m->pg_init_required)
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pg->bypassed = 0;
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pg->bypassed = false;
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if (--m->pg_init_in_progress)
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/* Activations of other paths are still on going */
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@ -1235,7 +1236,7 @@ static void pg_init_done(void *data, int errors)
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if (__pg_init_all_paths(m))
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goto out;
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}
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m->queue_io = 0;
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m->queue_io = false;
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/*
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* Wake up any thread waiting to suspend.
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@ -1350,7 +1351,7 @@ static void multipath_presuspend(struct dm_target *ti)
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{
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struct multipath *m = ti->private;
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queue_if_no_path(m, 0, 1);
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queue_if_no_path(m, false, true);
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}
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static void multipath_postsuspend(struct dm_target *ti)
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@ -1516,10 +1517,10 @@ static int multipath_message(struct dm_target *ti, unsigned argc, char **argv)
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if (argc == 1) {
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if (!strcasecmp(argv[0], "queue_if_no_path")) {
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r = queue_if_no_path(m, 1, 0);
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r = queue_if_no_path(m, true, false);
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goto out;
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} else if (!strcasecmp(argv[0], "fail_if_no_path")) {
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r = queue_if_no_path(m, 0, 0);
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r = queue_if_no_path(m, false, false);
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goto out;
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}
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}
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@ -1530,10 +1531,10 @@ static int multipath_message(struct dm_target *ti, unsigned argc, char **argv)
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}
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if (!strcasecmp(argv[0], "disable_group")) {
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r = bypass_pg_num(m, argv[1], 1);
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r = bypass_pg_num(m, argv[1], true);
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goto out;
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} else if (!strcasecmp(argv[0], "enable_group")) {
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r = bypass_pg_num(m, argv[1], 0);
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r = bypass_pg_num(m, argv[1], false);
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goto out;
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} else if (!strcasecmp(argv[0], "switch_group")) {
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r = switch_pg_num(m, argv[1]);
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@ -1651,7 +1652,7 @@ static int __pgpath_busy(struct pgpath *pgpath)
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*/
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static int multipath_busy(struct dm_target *ti)
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{
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int busy = 0, has_active = 0;
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bool busy = false, has_active = false;
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struct multipath *m = ti->private;
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struct priority_group *pg;
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struct pgpath *pgpath;
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@ -1662,7 +1663,7 @@ static int multipath_busy(struct dm_target *ti)
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/* pg_init in progress or no paths available */
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if (m->pg_init_in_progress ||
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(!m->nr_valid_paths && m->queue_if_no_path)) {
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busy = 1;
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busy = true;
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goto out;
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}
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/* Guess which priority_group will be used at next mapping time */
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@ -1684,13 +1685,13 @@ static int multipath_busy(struct dm_target *ti)
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* If there is one non-busy active path at least, the path selector
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* will be able to select it. So we consider such a pg as not busy.
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*/
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busy = 1;
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busy = true;
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list_for_each_entry(pgpath, &pg->pgpaths, list)
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if (pgpath->is_active) {
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has_active = 1;
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has_active = true;
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if (!__pgpath_busy(pgpath)) {
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busy = 0;
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busy = false;
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break;
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}
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}
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@ -1701,7 +1702,7 @@ static int multipath_busy(struct dm_target *ti)
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* the current_pg will be changed at next mapping time.
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* We need to try mapping to determine it.
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*/
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busy = 0;
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busy = false;
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out:
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spin_unlock_irqrestore(&m->lock, flags);
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