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authorMatthew Wilcox <matthew.r.wilcox@intel.com>2014-06-04 16:07:45 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-04 16:54:02 -0700
commit57d998456ae8680ed446aa1993f45f4d8a9a5973 (patch)
tree9e6eef3413adffabf06dc10dafab03c02d21c8be
parent90768eee4565adb28ea28b4ac5081c676a8fe1f2 (diff)
downloadlinux-57d998456ae8680ed446aa1993f45f4d8a9a5973.tar.bz2
fs/mpage.c: factor page_endio() out of mpage_end_io()
page_endio() takes care of updating all the appropriate page flags once I/O has finished to a page. Switch to using mapping_set_error() instead of setting AS_EIO directly; this will handle thin-provisioned devices correctly. Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com> Cc: Dave Chinner <david@fromorbit.com> Cc: Dheeraj Reddy <dheeraj.reddy@intel.com> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/mpage.c18
-rw-r--r--include/linux/pagemap.h2
-rw-r--r--mm/filemap.c25
3 files changed, 28 insertions, 17 deletions
diff --git a/fs/mpage.c b/fs/mpage.c
index 4cc9c5d079f7..10da0da73017 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -48,23 +48,7 @@ static void mpage_end_io(struct bio *bio, int err)
bio_for_each_segment_all(bv, bio, i) {
struct page *page = bv->bv_page;
-
- if (bio_data_dir(bio) == READ) {
- if (!err) {
- SetPageUptodate(page);
- } else {
- ClearPageUptodate(page);
- SetPageError(page);
- }
- unlock_page(page);
- } else { /* bio_data_dir(bio) == WRITE */
- if (err) {
- SetPageError(page);
- if (page->mapping)
- set_bit(AS_EIO, &page->mapping->flags);
- }
- end_page_writeback(page);
- }
+ page_endio(page, bio_data_dir(bio), err);
}
bio_put(bio);
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 45598f1e9aa3..718214c5584e 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -425,6 +425,8 @@ static inline void wait_on_page_writeback(struct page *page)
extern void end_page_writeback(struct page *page);
void wait_for_stable_page(struct page *page);
+void page_endio(struct page *page, int rw, int err);
+
/*
* Add an arbitrary waiter to a page's wait queue
*/
diff --git a/mm/filemap.c b/mm/filemap.c
index 021056c324e6..47d235b357a7 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -764,6 +764,31 @@ void end_page_writeback(struct page *page)
}
EXPORT_SYMBOL(end_page_writeback);
+/*
+ * After completing I/O on a page, call this routine to update the page
+ * flags appropriately
+ */
+void page_endio(struct page *page, int rw, int err)
+{
+ if (rw == READ) {
+ if (!err) {
+ SetPageUptodate(page);
+ } else {
+ ClearPageUptodate(page);
+ SetPageError(page);
+ }
+ unlock_page(page);
+ } else { /* rw == WRITE */
+ if (err) {
+ SetPageError(page);
+ if (page->mapping)
+ mapping_set_error(page->mapping, err);
+ }
+ end_page_writeback(page);
+ }
+}
+EXPORT_SYMBOL_GPL(page_endio);
+
/**
* __lock_page - get a lock on the page, assuming we need to sleep to get it
* @page: the page to lock