if (--bvec >= bio->bi_io_vec)
prefetchw(&bvec->bv_page->flags);
- if (!uptodate)
+ if (!uptodate){
SetPageError(page);
+ if (page->mapping)
+ set_bit(AS_EIO, &page->mapping->flags);
+ }
end_page_writeback(page);
} while (bvec >= bio->bi_io_vec);
bio_put(bio);
return 0;
}
-struct bio *mpage_bio_submit(int rw, struct bio *bio)
+static struct bio *mpage_bio_submit(int rw, struct bio *bio)
{
bio->bi_end_io = mpage_end_io_read;
if (rw == WRITE)
static struct bio *
mpage_alloc(struct block_device *bdev,
sector_t first_sector, int nr_vecs,
- unsigned int __nocast gfp_flags)
+ gfp_t gfp_flags)
{
struct bio *bio;
} while (page_bh != head);
}
-/**
- * mpage_readpages - populate an address space with some pages, and
- * start reads against them.
- *
- * @mapping: the address_space
- * @pages: The address of a list_head which contains the target pages. These
- * pages have their ->index populated and are otherwise uninitialised.
- *
- * The page at @pages->prev has the lowest file offset, and reads should be
- * issued in @pages->prev to @pages->next order.
- *
- * @nr_pages: The number of pages at *@pages
- * @get_block: The filesystem's block mapper function.
- *
- * This function walks the pages and the blocks within each page, building and
- * emitting large BIOs.
- *
- * If anything unusual happens, such as:
- *
- * - encountering a page which has buffers
- * - encountering a page which has a non-hole after a hole
- * - encountering a page with non-contiguous blocks
- *
- * then this code just gives up and calls the buffer_head-based read function.
- * It does handle a page which has holes at the end - that is a common case:
- * the end-of-file on blocksize < PAGE_CACHE_SIZE setups.
- *
- * BH_Boundary explanation:
- *
- * There is a problem. The mpage read code assembles several pages, gets all
- * their disk mappings, and then submits them all. That's fine, but obtaining
- * the disk mappings may require I/O. Reads of indirect blocks, for example.
- *
- * So an mpage read of the first 16 blocks of an ext2 file will cause I/O to be
- * submitted in the following order:
- * 12 0 1 2 3 4 5 6 7 8 9 10 11 13 14 15 16
- * because the indirect block has to be read to get the mappings of blocks
- * 13,14,15,16. Obviously, this impacts performance.
- *
- * So what we do it to allow the filesystem's get_block() function to set
- * BH_Boundary when it maps block 11. BH_Boundary says: mapping of the block
- * after this one will require I/O against a block which is probably close to
- * this one. So you should push what I/O you have currently accumulated.
- *
- * This all causes the disk requests to be issued in the correct order.
- */
static struct bio *
do_mpage_readpage(struct bio *bio, struct page *page, unsigned nr_pages,
sector_t *last_block_in_bio, get_block_t get_block)
if (page_has_buffers(page))
goto confused;
- block_in_file = page->index << (PAGE_CACHE_SHIFT - blkbits);
+ block_in_file = (sector_t)page->index << (PAGE_CACHE_SHIFT - blkbits);
last_block = (i_size_read(inode) + blocksize - 1) >> blkbits;
bh.b_page = page;
goto out;
}
+/**
+ * mpage_readpages - populate an address space with some pages, and
+ * start reads against them.
+ *
+ * @mapping: the address_space
+ * @pages: The address of a list_head which contains the target pages. These
+ * pages have their ->index populated and are otherwise uninitialised.
+ *
+ * The page at @pages->prev has the lowest file offset, and reads should be
+ * issued in @pages->prev to @pages->next order.
+ *
+ * @nr_pages: The number of pages at *@pages
+ * @get_block: The filesystem's block mapper function.
+ *
+ * This function walks the pages and the blocks within each page, building and
+ * emitting large BIOs.
+ *
+ * If anything unusual happens, such as:
+ *
+ * - encountering a page which has buffers
+ * - encountering a page which has a non-hole after a hole
+ * - encountering a page with non-contiguous blocks
+ *
+ * then this code just gives up and calls the buffer_head-based read function.
+ * It does handle a page which has holes at the end - that is a common case:
+ * the end-of-file on blocksize < PAGE_CACHE_SIZE setups.
+ *
+ * BH_Boundary explanation:
+ *
+ * There is a problem. The mpage read code assembles several pages, gets all
+ * their disk mappings, and then submits them all. That's fine, but obtaining
+ * the disk mappings may require I/O. Reads of indirect blocks, for example.
+ *
+ * So an mpage read of the first 16 blocks of an ext2 file will cause I/O to be
+ * submitted in the following order:
+ * 12 0 1 2 3 4 5 6 7 8 9 10 11 13 14 15 16
+ * because the indirect block has to be read to get the mappings of blocks
+ * 13,14,15,16. Obviously, this impacts performance.
+ *
+ * So what we do it to allow the filesystem's get_block() function to set
+ * BH_Boundary when it maps block 11. BH_Boundary says: mapping of the block
+ * after this one will require I/O against a block which is probably close to
+ * this one. So you should push what I/O you have currently accumulated.
+ *
+ * This all causes the disk requests to be issued in the correct order.
+ */
int
mpage_readpages(struct address_space *mapping, struct list_head *pages,
unsigned nr_pages, get_block_t get_block)
* The page has no buffers: map it to disk
*/
BUG_ON(!PageUptodate(page));
- block_in_file = page->index << (PAGE_CACHE_SHIFT - blkbits);
+ block_in_file = (sector_t)page->index << (PAGE_CACHE_SHIFT - blkbits);
last_block = (i_size - 1) >> blkbits;
map_bh.b_page = page;
for (page_block = 0; page_block < blocks_per_page; ) {
int
mpage_writepages(struct address_space *mapping,
struct writeback_control *wbc, get_block_t get_block)
-{
- return __mpage_writepages(mapping, wbc, get_block,
- mapping->a_ops->writepage);
-}
-
-int
-__mpage_writepages(struct address_space *mapping,
- struct writeback_control *wbc, get_block_t get_block,
- writepage_t writepage_fn)
{
struct backing_dev_info *bdi = mapping->backing_dev_info;
struct bio *bio = NULL;
} else {
bio = __mpage_writepage(bio, page, get_block,
&last_block_in_bio, &ret, wbc,
- writepage_fn);
+ page->mapping->a_ops->writepage);
}
- if (unlikely(ret == WRITEPAGE_ACTIVATE))
+ if (unlikely(ret == AOP_WRITEPAGE_ACTIVATE))
unlock_page(page);
if (ret || (--(wbc->nr_to_write) <= 0))
done = 1;
return ret;
}
EXPORT_SYMBOL(mpage_writepages);
-EXPORT_SYMBOL(__mpage_writepages);
int mpage_writepage(struct page *page, get_block_t get_block,
struct writeback_control *wbc)
projects / linux-2.6-omap-h63xx.git / blobdiff