[v2,0/6] xfs-4.19: various fixes

Message

Darrick J. Wong Aug. 11, 2018, 3:34 p.m. UTC

Hi all,

Here are some late fixes for 4.19.

The first patch teaches xfs to trigger a sb counter recalculation if the
icount is bad; when I added the icount check to the write verifier, I
forgot to add the corresponding check to the read side.

The second patch fixes the online repair "find AG btree root" function
to ignore btree blocks that have siblings and to ignore a btree level if
multiple sibling-less blocks are found.

The third patch fixes a problem when allocating a transaction for online
repairs where if the AGF block or AGI inode counts are totally garbage
we can end up ENOSPC'ing out of online repair after an attempt to
reserve a ridiculous number of blocks.  This is unfortunate,
particularly if we were setting up for an AGF/AGI counter repair.

The fourth patch fixes some buffer state management bugs so that we
don't accidentally clobber b_ops on buffers that were already in-core
when we try to find an AG header's btree root blocks.

The fifth patch fixes an uninitialized variable usage in the iomap code.

The sixth patch avoids a crash in the VFS readlink routines if we have
an inline symlink that's corrupted such that if_data is NULL.

Comments and questions are, as always, welcome.

--D