Btrfs: Fix PAGE_CACHE_SHIFT shifts on 32 bit machines

Signed-off-by: Chris Mason <chris.mason@oracle.com>

5 files changed, 26 insertions, 22 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 5a7e60d7f443..8935eec31ee2 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -159,7 +159,7 @@ static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
 int csum_dirty_buffer(struct btrfs_root *root, struct page *page)
 {
 	struct extent_map_tree *tree;
-	u64 start = page->index << PAGE_CACHE_SHIFT;
+	u64 start = (u64)page->index << PAGE_CACHE_SHIFT;
 	u64 found_start;
 	int found_level;
 	unsigned long len;
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index e4ee980cc138..238cb1d81d56 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -1229,7 +1229,7 @@ EXPORT_SYMBOL(test_range_bit);
 static int check_page_uptodate(struct extent_map_tree *tree,
 			       struct page *page)
 {
-	u64 start = page->index << PAGE_CACHE_SHIFT;
+	u64 start = (u64)page->index << PAGE_CACHE_SHIFT;
 	u64 end = start + PAGE_CACHE_SIZE - 1;
 	if (test_range_bit(tree, start, end, EXTENT_UPTODATE, 1))
 		SetPageUptodate(page);
@@ -1243,7 +1243,7 @@ static int check_page_uptodate(struct extent_map_tree *tree,
 static int check_page_locked(struct extent_map_tree *tree,
 			     struct page *page)
 {
-	u64 start = page->index << PAGE_CACHE_SHIFT;
+	u64 start = (u64)page->index << PAGE_CACHE_SHIFT;
 	u64 end = start + PAGE_CACHE_SIZE - 1;
 	if (!test_range_bit(tree, start, end, EXTENT_LOCKED, 0))
 		unlock_page(page);
@@ -1257,7 +1257,7 @@ static int check_page_locked(struct extent_map_tree *tree,
 static int check_page_writeback(struct extent_map_tree *tree,
 			     struct page *page)
 {
-	u64 start = page->index << PAGE_CACHE_SHIFT;
+	u64 start = (u64)page->index << PAGE_CACHE_SHIFT;
 	u64 end = start + PAGE_CACHE_SIZE - 1;
 	if (!test_range_bit(tree, start, end, EXTENT_WRITEBACK, 0))
 		end_page_writeback(page);
@@ -1296,7 +1296,8 @@ static int end_bio_extent_writepage(struct bio *bio,
 
 	do {
 		struct page *page = bvec->bv_page;
-		start = (page->index << PAGE_CACHE_SHIFT) + bvec->bv_offset;
+		start = ((u64)page->index << PAGE_CACHE_SHIFT) +
+			 bvec->bv_offset;
 		end = start + bvec->bv_len - 1;
 
 		if (bvec->bv_offset == 0 && bvec->bv_len == PAGE_CACHE_SIZE)
@@ -1361,7 +1362,8 @@ static int end_bio_extent_readpage(struct bio *bio,
 
 	do {
 		struct page *page = bvec->bv_page;
-		start = (page->index << PAGE_CACHE_SHIFT) + bvec->bv_offset;
+		start = ((u64)page->index << PAGE_CACHE_SHIFT) +
+			bvec->bv_offset;
 		end = start + bvec->bv_len - 1;
 
 		if (bvec->bv_offset == 0 && bvec->bv_len == PAGE_CACHE_SIZE)
@@ -1427,7 +1429,8 @@ static int end_bio_extent_preparewrite(struct bio *bio,
 
 	do {
 		struct page *page = bvec->bv_page;
-		start = (page->index << PAGE_CACHE_SHIFT) + bvec->bv_offset;
+		start = ((u64)page->index << PAGE_CACHE_SHIFT) +
+			bvec->bv_offset;
 		end = start + bvec->bv_len - 1;
 
 		if (--bvec >= bio->bi_io_vec)
@@ -1503,7 +1506,7 @@ int extent_read_full_page(struct extent_map_tree *tree, struct page *page,
 			  get_extent_t *get_extent)
 {
 	struct inode *inode = page->mapping->host;
-	u64 start = page->index << PAGE_CACHE_SHIFT;
+	u64 start = (u64)page->index << PAGE_CACHE_SHIFT;
 	u64 page_end = start + PAGE_CACHE_SIZE - 1;
 	u64 end;
 	u64 cur = start;
@@ -1608,7 +1611,7 @@ int extent_write_full_page(struct extent_map_tree *tree, struct page *page,
 			  struct writeback_control *wbc)
 {
 	struct inode *inode = page->mapping->host;
-	u64 start = page->index << PAGE_CACHE_SHIFT;
+	u64 start = (u64)page->index << PAGE_CACHE_SHIFT;
 	u64 page_end = start + PAGE_CACHE_SIZE - 1;
 	u64 end;
 	u64 cur = start;
@@ -1750,7 +1753,7 @@ EXPORT_SYMBOL(extent_write_full_page);
 int extent_invalidatepage(struct extent_map_tree *tree,
 			  struct page *page, unsigned long offset)
 {
-	u64 start = (page->index << PAGE_CACHE_SHIFT);
+	u64 start = ((u64)page->index << PAGE_CACHE_SHIFT);
 	u64 end = start + PAGE_CACHE_SIZE - 1;
 	size_t blocksize = page->mapping->host->i_sb->s_blocksize;
 
@@ -1792,7 +1795,7 @@ int extent_prepare_write(struct extent_map_tree *tree,
 			 struct inode *inode, struct page *page,
 			 unsigned from, unsigned to, get_extent_t *get_extent)
 {
-	u64 page_start = page->index << PAGE_CACHE_SHIFT;
+	u64 page_start = (u64)page->index << PAGE_CACHE_SHIFT;
 	u64 page_end = page_start + PAGE_CACHE_SIZE - 1;
 	u64 block_start;
 	u64 orig_block_start;
@@ -1890,7 +1893,7 @@ EXPORT_SYMBOL(extent_prepare_write);
 int try_release_extent_mapping(struct extent_map_tree *tree, struct page *page)
 {
 	struct extent_map *em;
-	u64 start = page->index << PAGE_CACHE_SHIFT;
+	u64 start = (u64)page->index << PAGE_CACHE_SHIFT;
 	u64 end = start + PAGE_CACHE_SIZE - 1;
 	u64 orig_start = start;
 	int ret = 1;
@@ -2202,7 +2205,7 @@ int clear_extent_buffer_dirty(struct extent_map_tree *tree,
 		if ((i == 0 && (eb->start & (PAGE_CACHE_SIZE - 1))) ||
 		    ((i == num_pages - 1) &&
 		     ((eb->start + eb->len) & (PAGE_CACHE_SIZE - 1)))) {
-			start = page->index << PAGE_CACHE_SHIFT;
+			start = (u64)page->index << PAGE_CACHE_SHIFT;
 			end  = start + PAGE_CACHE_SIZE - 1;
 			if (test_range_bit(tree, start, end,
 					   EXTENT_DIRTY, 0)) {
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 843e920388ed..abdd9caad94e 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -301,7 +301,8 @@ static int dirty_and_release_pages(struct btrfs_trans_handle *trans,
 			SetPageUptodate(p);
 			set_page_dirty(p);
 		}
-		last_end = pages[num_pages -1]->index << PAGE_CACHE_SHIFT;
+		last_end = (u64)(pages[num_pages -1]->index) <<
+				PAGE_CACHE_SHIFT;
 		last_end += PAGE_CACHE_SIZE - 1;
 		set_extent_delalloc(em_tree, start_pos, end_of_last_block,
 				 GFP_NOFS);
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 0ba1cdbdf112..5d10b64e42df 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -111,7 +111,7 @@ int btrfs_writepage_io_hook(struct page *page, u64 start, u64 end)
 	struct btrfs_trans_handle *trans;
 	char *kaddr;
 	int ret;
-	u64 page_start = page->index << PAGE_CACHE_SHIFT;
+	u64 page_start = (u64)page->index << PAGE_CACHE_SHIFT;
 	size_t offset = start - page_start;
 
 	mutex_lock(&root->fs_info->fs_mutex);
@@ -160,7 +160,7 @@ out:
 
 int btrfs_readpage_end_io_hook(struct page *page, u64 start, u64 end)
 {
-	size_t offset = start - (page->index << PAGE_CACHE_SHIFT);
+	size_t offset = start - ((u64)page->index << PAGE_CACHE_SHIFT);
 	struct inode *inode = page->mapping->host;
 	struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
 	char *kaddr;
@@ -688,7 +688,7 @@ static int btrfs_cow_one_page(struct inode *inode, struct page *page,
 	char *kaddr;
 	int ret = 0;
 	struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
-	u64 page_start = page->index << PAGE_CACHE_SHIFT;
+	u64 page_start = (u64)page->index << PAGE_CACHE_SHIFT;
 	u64 page_end = page_start + PAGE_CACHE_SIZE - 1;
 
 	set_page_extent_mapped(page);
@@ -739,7 +739,7 @@ static int btrfs_truncate_page(struct address_space *mapping, loff_t from)
 			goto out;
 		}
 	}
-	page_start = page->index << PAGE_CACHE_SHIFT;
+	page_start = (u64)page->index << PAGE_CACHE_SHIFT;
 
 	ret = btrfs_cow_one_page(inode, page, offset);
 
@@ -1618,7 +1618,7 @@ again:
 			goto out;
 		}
 
-		extent_offset = (page->index << PAGE_CACHE_SHIFT) -
+		extent_offset = ((u64)page->index << PAGE_CACHE_SHIFT) -
 			extent_start + page_offset;
 		copy_size = min_t(u64, PAGE_CACHE_SIZE - page_offset,
 				size - extent_offset);
@@ -1769,7 +1769,7 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page)
 	lock_page(page);
 	wait_on_page_writeback(page);
 	size = i_size_read(inode);
-	page_start = page->index << PAGE_CACHE_SHIFT;
+	page_start = (u64)page->index << PAGE_CACHE_SHIFT;
 
 	if ((page->mapping != inode->i_mapping) ||
 	    (page_start > size)) {
@@ -2065,7 +2065,7 @@ int btrfs_defrag_file(struct file *file) {
 				goto out_unlock;
 			}
 		}
-		page_start = page->index << PAGE_CACHE_SHIFT;
+		page_start = (u64)page->index << PAGE_CACHE_SHIFT;
 		page_end = page_start + PAGE_CACHE_SIZE - 1;
 
 		lock_extent(em_tree, page_start, page_end, GFP_NOFS);
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index bdfe05cf26c6..4af1c0dab7f8 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -169,7 +169,7 @@ int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
 		clear_extent_dirty(dirty_pages, start, end, GFP_NOFS);
 		while(start <= end) {
 			index = start >> PAGE_CACHE_SHIFT;
-			start = (index + 1) << PAGE_CACHE_SHIFT;
+			start = (u64)(index + 1) << PAGE_CACHE_SHIFT;
 			page = find_lock_page(btree_inode->i_mapping, index);
 			if (!page)
 				continue;