#define DEBUG_SUBSYSTEM S_LLITE
-#ifndef __KERNEL__
-# error This file is kernel only.
-#endif
#include <obd.h>
-#include <lustre_lite.h>
-
+#include "llite_internal.h"
#include "vvp_internal.h"
/*****************************************************************************
const struct cl_page_slice *slice,
struct cl_io *unused)
{
- struct page *vmpage = cl2vm_page(slice);
- struct address_space *mapping;
- struct ccc_page *cpg = cl2ccc_page(slice);
-
- LASSERT(vmpage != NULL);
- LASSERT(PageLocked(vmpage));
-
- mapping = vmpage->mapping;
-
- if (cpg->cpg_defer_uptodate && !cpg->cpg_ra_used)
- ll_ra_stats_inc(mapping, RA_STAT_DISCARDED);
-
- /*
- * truncate_complete_page() calls
- * a_ops->invalidatepage()->cl_page_delete()->vvp_page_delete().
- */
- truncate_complete_page(mapping, vmpage);
-}
-
-static int vvp_page_unmap(const struct lu_env *env,
- const struct cl_page_slice *slice,
- struct cl_io *unused)
-{
- struct page *vmpage = cl2vm_page(slice);
- __u64 offset;
+ struct page *vmpage = cl2vm_page(slice);
+ struct ccc_page *cpg = cl2ccc_page(slice);
LASSERT(vmpage != NULL);
LASSERT(PageLocked(vmpage));
- offset = vmpage->index << PAGE_CACHE_SHIFT;
+ if (cpg->cpg_defer_uptodate && !cpg->cpg_ra_used)
+ ll_ra_stats_inc(vmpage->mapping->host, RA_STAT_DISCARDED);
- /*
- * XXX is it safe to call this with the page lock held?
- */
- ll_teardown_mmaps(vmpage->mapping, offset, offset + PAGE_CACHE_SIZE);
- return 0;
+ ll_invalidate_page(vmpage);
}
static void vvp_page_delete(const struct lu_env *env,
const struct cl_page_slice *slice)
{
- struct page *vmpage = cl2vm_page(slice);
+ struct page *vmpage = cl2vm_page(slice);
struct inode *inode = vmpage->mapping->host;
struct cl_object *obj = slice->cpl_obj;
+ struct cl_page *page = slice->cpl_page;
+ int refc;
- LASSERT(PageLocked(vmpage));
- LASSERT((struct cl_page *)vmpage->private == slice->cpl_page);
- LASSERT(inode == ccc_object_inode(obj));
+ LASSERT(PageLocked(vmpage));
+ LASSERT((struct cl_page *)vmpage->private == page);
+ LASSERT(inode == ccc_object_inode(obj));
- vvp_write_complete(cl2ccc(obj), cl2ccc_page(slice));
- ClearPagePrivate(vmpage);
- vmpage->private = 0;
- /*
- * Reference from vmpage to cl_page is removed, but the reference back
- * is still here. It is removed later in vvp_page_fini().
- */
+ vvp_write_complete(cl2ccc(obj), cl2ccc_page(slice));
+
+ /* Drop the reference count held in vvp_page_init */
+ refc = atomic_dec_return(&page->cp_ref);
+ LASSERTF(refc >= 1, "page = %p, refc = %d\n", page, refc);
+
+ ClearPageUptodate(vmpage);
+ ClearPagePrivate(vmpage);
+ vmpage->private = 0;
+ /*
+ * Reference from vmpage to cl_page is removed, but the reference back
+ * is still here. It is removed later in vvp_page_fini().
+ */
}
static void vvp_page_export(const struct lu_env *env,
int ioret)
{
struct ccc_page *cp = cl2ccc_page(slice);
- struct page *vmpage = cp->cpg_page;
- struct cl_page *page = cl_page_top(slice->cpl_page);
+ struct page *vmpage = cp->cpg_page;
+ struct cl_page *page = slice->cpl_page;
struct inode *inode = ccc_object_inode(page->cp_obj);
ENTRY;
RETURN(result);
}
+static int vvp_page_is_under_lock(const struct lu_env *env,
+ const struct cl_page_slice *slice,
+ struct cl_io *io, pgoff_t *max_index)
+{
+ ENTRY;
+
+ if (io->ci_type == CIT_READ || io->ci_type == CIT_WRITE ||
+ io->ci_type == CIT_FAULT) {
+ struct ccc_io *cio = ccc_env_io(env);
+
+ if (unlikely(cio->cui_fd->fd_flags & LL_FILE_GROUP_LOCKED))
+ *max_index = CL_PAGE_EOF;
+ }
+ RETURN(0);
+}
+
+
static int vvp_page_print(const struct lu_env *env,
const struct cl_page_slice *slice,
void *cookie, lu_printer_t printer)
.cpo_assume = vvp_page_assume,
.cpo_unassume = vvp_page_unassume,
.cpo_disown = vvp_page_disown,
- .cpo_vmpage = ccc_page_vmpage,
.cpo_discard = vvp_page_discard,
.cpo_delete = vvp_page_delete,
- .cpo_unmap = vvp_page_unmap,
.cpo_export = vvp_page_export,
.cpo_is_vmlocked = vvp_page_is_vmlocked,
.cpo_fini = vvp_page_fini,
.cpo_print = vvp_page_print,
- .cpo_is_under_lock = ccc_page_is_under_lock,
+ .cpo_is_under_lock = vvp_page_is_under_lock,
.io = {
[CRT_READ] = {
.cpo_prep = vvp_page_prep_read,
static void vvp_transient_page_verify(const struct cl_page *page)
{
- struct inode *inode = ccc_object_inode(page->cp_obj);
-
- LASSERT(!mutex_trylock(&inode->i_mutex));
}
static int vvp_transient_page_own(const struct lu_env *env,
struct ccc_object *clobj = cl2ccc(clp->cp_obj);
vvp_page_fini_common(cp);
- LASSERT(!mutex_trylock(&clobj->cob_inode->i_mutex));
- clobj->cob_transient_pages--;
+ atomic_dec(&clobj->cob_transient_pages);
}
static const struct cl_page_operations vvp_transient_page_ops = {
- .cpo_own = vvp_transient_page_own,
- .cpo_assume = vvp_transient_page_assume,
- .cpo_unassume = vvp_transient_page_unassume,
- .cpo_disown = vvp_transient_page_disown,
- .cpo_discard = vvp_transient_page_discard,
- .cpo_vmpage = ccc_page_vmpage,
- .cpo_fini = vvp_transient_page_fini,
- .cpo_is_vmlocked = vvp_transient_page_is_vmlocked,
- .cpo_print = vvp_page_print,
- .cpo_is_under_lock = ccc_page_is_under_lock,
- .io = {
- [CRT_READ] = {
- .cpo_prep = ccc_transient_page_prep,
- .cpo_completion = vvp_transient_page_completion,
- },
- [CRT_WRITE] = {
- .cpo_prep = ccc_transient_page_prep,
- .cpo_completion = vvp_transient_page_completion,
- }
- }
+ .cpo_own = vvp_transient_page_own,
+ .cpo_assume = vvp_transient_page_assume,
+ .cpo_unassume = vvp_transient_page_unassume,
+ .cpo_disown = vvp_transient_page_disown,
+ .cpo_discard = vvp_transient_page_discard,
+ .cpo_fini = vvp_transient_page_fini,
+ .cpo_is_vmlocked = vvp_transient_page_is_vmlocked,
+ .cpo_print = vvp_page_print,
+ .cpo_is_under_lock = vvp_page_is_under_lock,
+ .io = {
+ [CRT_READ] = {
+ .cpo_prep = ccc_transient_page_prep,
+ .cpo_completion = vvp_transient_page_completion,
+ },
+ [CRT_WRITE] = {
+ .cpo_prep = ccc_transient_page_prep,
+ .cpo_completion = vvp_transient_page_completion,
+ }
+ }
};
int vvp_page_init(const struct lu_env *env, struct cl_object *obj,
- struct cl_page *page, struct page *vmpage)
+ struct cl_page *page, pgoff_t index)
{
struct ccc_page *cpg = cl_object_page_slice(obj, page);
+ struct page *vmpage = page->cp_vmpage;
CLOBINVRNT(env, obj, ccc_object_invariant(obj));
cpg->cpg_page = vmpage;
page_cache_get(vmpage);
- CFS_INIT_LIST_HEAD(&cpg->cpg_pending_linkage);
+ INIT_LIST_HEAD(&cpg->cpg_pending_linkage);
if (page->cp_type == CPT_CACHEABLE) {
+ /* in cache, decref in vvp_page_delete */
+ atomic_inc(&page->cp_ref);
SetPagePrivate(vmpage);
vmpage->private = (unsigned long)page;
- cl_page_slice_add(page, &cpg->cpg_cl, obj,
+ cl_page_slice_add(page, &cpg->cpg_cl, obj, index,
&vvp_page_ops);
} else {
struct ccc_object *clobj = cl2ccc(obj);
- LASSERT(!mutex_trylock(&clobj->cob_inode->i_mutex));
- cl_page_slice_add(page, &cpg->cpg_cl, obj,
+ cl_page_slice_add(page, &cpg->cpg_cl, obj, index,
&vvp_transient_page_ops);
- clobj->cob_transient_pages++;
+ atomic_inc(&clobj->cob_transient_pages);
}
return 0;
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff