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>

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 0924521..f8cf619 100644 (file)
--- 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)