f2fs: fix to report newly allocate region as extent

Previous get_block in f2fs didn't report the newly allocated region which has
NEW_ADDR.
For reader, it should not report, but fiemap needs this.
So, this patch introduces two get_block sharing core function.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 18 insertions, 5 deletions

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 0924521306b4..f8cf619edb5f 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -608,8 +608,8 @@ static int __allocate_data_block(struct dnode_of_data *dn)
  *     b. do not use extent cache for better performance
  *     c. give the block addresses to blockdev
  */
-static int get_data_block(struct inode *inode, sector_t iblock,
-                        struct buffer_head *bh_result, int create)
+static int __get_data_block(struct inode *inode, sector_t iblock,
+                        struct buffer_head *bh_result, int create, bool fiemap)
 {
         struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
         unsigned int blkbits = inode->i_sb->s_blocksize_bits;
@@ -637,7 +637,7 @@ static int get_data_block(struct inode *inode, sector_t iblock,
                         err = 0;
                 goto unlock_out;
         }
-        if (dn.data_blkaddr == NEW_ADDR)
+        if (dn.data_blkaddr == NEW_ADDR && !fiemap)
                 goto put_out;
 
         if (dn.data_blkaddr != NULL_ADDR) {
@@ -671,7 +671,7 @@ get_next:
                                 err = 0;
                         goto unlock_out;
                 }
-                if (dn.data_blkaddr == NEW_ADDR)
+                if (dn.data_blkaddr == NEW_ADDR && !fiemap)
                         goto put_out;
 
                 end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
@@ -708,10 +708,23 @@ out:
         return err;
 }
 
+static int get_data_block(struct inode *inode, sector_t iblock,
+                        struct buffer_head *bh_result, int create)
+{
+        return __get_data_block(inode, iblock, bh_result, create, false);
+}
+
+static int get_data_block_fiemap(struct inode *inode, sector_t iblock,
+                        struct buffer_head *bh_result, int create)
+{
+        return __get_data_block(inode, iblock, bh_result, create, true);
+}
+
 int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
                 u64 start, u64 len)
 {
-        return generic_block_fiemap(inode, fieinfo, start, len, get_data_block);
+        return generic_block_fiemap(inode, fieinfo,
+                                start, len, get_data_block_fiemap);
 }
 
 static int f2fs_read_data_page(struct file *file, struct page *page)