ext4: let fallocate handle inline data correctly

If we are punching hole in a file, we will return ENOTSUPP.
As for the fallocation of some extents, we will convert the
inline data to a normal extent based file first.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 70dc6fc..d45ff3f 100644 (file)
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4399,6 +4399,10 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
        if (mode & FALLOC_FL_PUNCH_HOLE)
                return ext4_punch_hole(file, offset, len);
 
+       ret = ext4_convert_inline_data(inode);
+       if (ret)
+               return ret;
+
        trace_ext4_fallocate_enter(inode, offset, len, mode);
        map.m_lblk = offset >> blkbits;
        /*

diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index 727edb8..53b2f65 100644 (file)
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1843,3 +1843,42 @@ out:
        ext4_journal_stop(handle);
        return;
 }
+
+int ext4_convert_inline_data(struct inode *inode)
+{
+       int error, needed_blocks;
+       handle_t *handle;
+       struct ext4_iloc iloc;
+
+       if (!ext4_has_inline_data(inode)) {
+               ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+               return 0;
+       }
+
+       needed_blocks = ext4_writepage_trans_blocks(inode);
+
+       iloc.bh = NULL;
+       error = ext4_get_inode_loc(inode, &iloc);
+       if (error)
+               return error;
+
+       handle = ext4_journal_start(inode, needed_blocks);
+       if (IS_ERR(handle)) {
+               error = PTR_ERR(handle);
+               goto out_free;
+       }
+
+       down_write(&EXT4_I(inode)->xattr_sem);
+       if (!ext4_has_inline_data(inode)) {
+               up_write(&EXT4_I(inode)->xattr_sem);
+               goto out;
+       }
+
+       error = ext4_convert_inline_data_nolock(handle, inode, &iloc);
+       up_write(&EXT4_I(inode)->xattr_sem);
+out:
+       ext4_journal_stop(handle);
+out_free:
+       brelse(iloc.bh);
+       return error;
+}

diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
index 1a71a97..4222388 100644 (file)
--- a/fs/ext4/xattr.h
+++ b/fs/ext4/xattr.h
@@ -192,6 +192,7 @@ extern int ext4_try_to_evict_inline_data(handle_t *handle,
                                         int needed);
 extern void ext4_inline_data_truncate(struct inode *inode, int *has_inline);
 
+extern int ext4_convert_inline_data(struct inode *inode);
 # else  /* CONFIG_EXT4_FS_XATTR */
 
 static inline int
@@ -420,6 +421,10 @@ static inline void ext4_inline_data_truncate(struct inode *inode,
        return;
 }
 
+static inline int ext4_convert_inline_data(struct inode *inode)
+{
+       return 0;
+}
 # endif  /* CONFIG_EXT4_FS_XATTR */
 
 #ifdef CONFIG_EXT4_FS_SECURITY