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iomap: fiemap should honor the FIEMAP_FLAG_SYNC flag 

The flag is checked as supported, but then we do an unconditional
sync of the file, regardless of whether the flag is set or not. Make
the sync conditional on having the FIEMAP_FLAG_SYNC flag set.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Dave Chinner 2016-08-17 08:41:10 +10:00 committed by Dave Chinner
parent 274c887494
commit 8896b8f609
1 changed files with 5 additions and 3 deletions
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8
fs/iomap.c
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@ -467,9 +467,11 @@ int iomap_fiemap(struct inode *inode, struct fiemap_extent_info *fi,
if (ret)
return ret;
ret = filemap_write_and_wait(inode->i_mapping);
if (ret)
return ret;
if (fi->fi_flags & FIEMAP_FLAG_SYNC) {
ret = filemap_write_and_wait(inode->i_mapping);
if (ret)
return ret;
}
while (len > 0) {
ret = iomap_apply(inode, start, len, 0, ops, &ctx,