59 	struct pt_section *section;  in pt_mk_section()  local
77 	section = malloc(sizeof(*section));  in pt_mk_section()
78 	if (!section)  in pt_mk_section()
81 	memset(section, 0, sizeof(*section));  in pt_mk_section()
83 	section->filename = dupstr(filename);  in pt_mk_section()
84 	section->status = status;  in pt_mk_section()
85 	section->offset = offset;  in pt_mk_section()
86 	section->size = size;  in pt_mk_section()
87 	section->ucount = 1;  in pt_mk_section()
91 	errcode = mtx_init(&section->lock, mtx_plain);  in pt_mk_section()
93 		free(section->filename);  in pt_mk_section()
94 		free(section);  in pt_mk_section()
98 	errcode = mtx_init(&section->alock, mtx_plain);  in pt_mk_section()
100 		mtx_destroy(&section->lock);  in pt_mk_section()
101 		free(section->filename);  in pt_mk_section()
102 		free(section);  in pt_mk_section()
108 	return section;  in pt_mk_section()
115 int pt_section_lock(struct pt_section *section)  in pt_section_lock()  argument
117 	if (!section)  in pt_section_lock()
124 		errcode = mtx_lock(&section->lock);  in pt_section_lock()
133 int pt_section_unlock(struct pt_section *section)  in pt_section_unlock()  argument
135 	if (!section)  in pt_section_unlock()
142 		errcode = mtx_unlock(&section->lock);  in pt_section_unlock()
151 static void pt_section_free(struct pt_section *section)  in pt_section_free()  argument
153 	if (!section)  in pt_section_free()
158 	mtx_destroy(&section->alock);  in pt_section_free()
159 	mtx_destroy(&section->lock);  in pt_section_free()
163 	free(section->filename);  in pt_section_free()
164 	free(section->status);  in pt_section_free()
165 	free(section);  in pt_section_free()
168 int pt_section_get(struct pt_section *section)  in pt_section_get()  argument
173 	if (!section)  in pt_section_get()
176 	errcode = pt_section_lock(section);  in pt_section_get()
180 	ucount = section->ucount + 1;  in pt_section_get()
182 		(void) pt_section_unlock(section);  in pt_section_get()
186 	section->ucount = ucount;  in pt_section_get()
188 	return pt_section_unlock(section);  in pt_section_get()
191 int pt_section_put(struct pt_section *section)  in pt_section_put()  argument
196 	if (!section)  in pt_section_put()
199 	errcode = pt_section_lock(section);  in pt_section_put()
203 	mcount = section->mcount;  in pt_section_put()
204 	ucount = section->ucount;  in pt_section_put()
206 		section->ucount = ucount - 1;  in pt_section_put()
207 		return pt_section_unlock(section);  in pt_section_put()
210 	errcode = pt_section_unlock(section);  in pt_section_put()
217 	pt_section_free(section);  in pt_section_put()
221 static int pt_section_lock_attach(struct pt_section *section)  in pt_section_lock_attach()  argument
223 	if (!section)  in pt_section_lock_attach()
230 		errcode = mtx_lock(&section->alock);  in pt_section_lock_attach()
239 static int pt_section_unlock_attach(struct pt_section *section)  in pt_section_unlock_attach()  argument
241 	if (!section)  in pt_section_unlock_attach()
248 		errcode = mtx_unlock(&section->alock);  in pt_section_unlock_attach()
257 int pt_section_attach(struct pt_section *section,  in pt_section_attach()  argument
263 	if (!section || !iscache)  in pt_section_attach()
266 	errcode = pt_section_lock_attach(section);  in pt_section_attach()
270 	ucount = section->ucount;  in pt_section_attach()
271 	acount = section->acount;  in pt_section_attach()
273 		if (section->iscache || !ucount)  in pt_section_attach()
276 		section->iscache = iscache;  in pt_section_attach()
277 		section->acount = 1;  in pt_section_attach()
279 		return pt_section_unlock_attach(section);  in pt_section_attach()
284 		(void) pt_section_unlock_attach(section);  in pt_section_attach()
291 	if (section->iscache != iscache)  in pt_section_attach()
294 	section->acount = acount;  in pt_section_attach()
296 	return pt_section_unlock_attach(section);  in pt_section_attach()
299 	(void) pt_section_unlock_attach(section);  in pt_section_attach()
303 int pt_section_detach(struct pt_section *section,  in pt_section_detach()  argument
309 	if (!section || !iscache)  in pt_section_detach()
312 	errcode = pt_section_lock_attach(section);  in pt_section_detach()
316 	if (section->iscache != iscache)  in pt_section_detach()
319 	acount = section->acount;  in pt_section_detach()
324 	ucount = section->ucount;  in pt_section_detach()
328 	section->acount = acount;  in pt_section_detach()
330 		section->iscache = NULL;  in pt_section_detach()
332 	return pt_section_unlock_attach(section);  in pt_section_detach()
335 	(void) pt_section_unlock_attach(section);  in pt_section_detach()
339 const char *pt_section_filename(const struct pt_section *section)  in pt_section_filename()  argument
341 	if (!section)  in pt_section_filename()
344 	return section->filename;  in pt_section_filename()
347 uint64_t pt_section_size(const struct pt_section *section)  in pt_section_size()  argument
349 	if (!section)  in pt_section_size()
352 	return section->size;  in pt_section_size()
355 static int pt_section_bcache_memsize(const struct pt_section *section,  in pt_section_bcache_memsize()  argument
360 	if (!section || !psize)  in pt_section_bcache_memsize()
363 	bcache = section->bcache;  in pt_section_bcache_memsize()
375 static int pt_section_memsize_locked(const struct pt_section *section,  in pt_section_memsize_locked()  argument
379 	int (*memsize)(const struct pt_section *section, uint64_t *size);  in pt_section_memsize_locked()
382 	if (!section || !psize)  in pt_section_memsize_locked()
385 	memsize = section->memsize;  in pt_section_memsize_locked()
387 		if (section->mcount)  in pt_section_memsize_locked()
394 	errcode = memsize(section, &msize);  in pt_section_memsize_locked()
398 	errcode = pt_section_bcache_memsize(section, &bcsize);  in pt_section_memsize_locked()
407 int pt_section_memsize(struct pt_section *section, uint64_t *size)  in pt_section_memsize()  argument
411 	errcode = pt_section_lock(section);  in pt_section_memsize()
415 	status = pt_section_memsize_locked(section, size);  in pt_section_memsize()
417 	errcode = pt_section_unlock(section);  in pt_section_memsize()
424 uint64_t pt_section_offset(const struct pt_section *section)  in pt_section_offset()  argument
426 	if (!section)  in pt_section_offset()
429 	return section->offset;  in pt_section_offset()
432 int pt_section_alloc_bcache(struct pt_section *section)  in pt_section_alloc_bcache()  argument
440 	if (!section)  in pt_section_alloc_bcache()
443 	if (!section->mcount)  in pt_section_alloc_bcache()
446 	ssize = pt_section_size(section);  in pt_section_alloc_bcache()
462 	errcode = pt_section_lock_attach(section);  in pt_section_alloc_bcache()
466 	errcode = pt_section_lock(section);  in pt_section_alloc_bcache()
470 	bcache = pt_section_bcache(section);  in pt_section_alloc_bcache()
488 	section->bcache = bcache;  in pt_section_alloc_bcache()
490 	errcode = pt_section_memsize_locked(section, &memsize);  in pt_section_alloc_bcache()
494 	errcode = pt_section_unlock(section);  in pt_section_alloc_bcache()
499 		iscache = section->iscache;  in pt_section_alloc_bcache()
501 			errcode = pt_iscache_notify_resize(iscache, section,  in pt_section_alloc_bcache()
508 	return pt_section_unlock_attach(section);  in pt_section_alloc_bcache()
512 	(void) pt_section_unlock(section);  in pt_section_alloc_bcache()
515 	(void) pt_section_unlock_attach(section);  in pt_section_alloc_bcache()
519 int pt_section_on_map_lock(struct pt_section *section)  in pt_section_on_map_lock()  argument
524 	if (!section)  in pt_section_on_map_lock()
527 	errcode = pt_section_lock_attach(section);  in pt_section_on_map_lock()
531 	iscache = section->iscache;  in pt_section_on_map_lock()
533 		return pt_section_unlock_attach(section);  in pt_section_on_map_lock()
542 	status = pt_iscache_notify_map(iscache, section);  in pt_section_on_map_lock()
544 	errcode = pt_section_unlock_attach(section);  in pt_section_on_map_lock()
551 int pt_section_map_share(struct pt_section *section)  in pt_section_map_share()  argument
556 	if (!section)  in pt_section_map_share()
559 	errcode = pt_section_lock(section);  in pt_section_map_share()
563 	mcount = section->mcount;  in pt_section_map_share()
565 		(void) pt_section_unlock(section);  in pt_section_map_share()
571 		(void) pt_section_unlock(section);  in pt_section_map_share()
575 	section->mcount = mcount;  in pt_section_map_share()
577 	return pt_section_unlock(section);  in pt_section_map_share()
580 int pt_section_unmap(struct pt_section *section)  in pt_section_unmap()  argument
585 	if (!section)  in pt_section_unmap()
588 	errcode = pt_section_lock(section);  in pt_section_unmap()
592 	mcount = section->mcount;  in pt_section_unmap()
598 	section->mcount = mcount -= 1;  in pt_section_unmap()
600 		return pt_section_unlock(section);  in pt_section_unmap()
603 	if (!section->unmap)  in pt_section_unmap()
606 	status = section->unmap(section);  in pt_section_unmap()
608 	pt_bcache_free(section->bcache);  in pt_section_unmap()
609 	section->bcache = NULL;  in pt_section_unmap()
611 	errcode = pt_section_unlock(section);  in pt_section_unmap()
618 	(void) pt_section_unlock(section);  in pt_section_unmap()
622 int pt_section_read(const struct pt_section *section, uint8_t *buffer,  in pt_section_read()  argument
627 	if (!section)  in pt_section_read()
630 	if (!section->read)  in pt_section_read()
633 	limit = section->size;  in pt_section_read()
642 	return section->read(section, buffer, size, offset);  in pt_section_read()