New kernels expect to do a partial match when a .prefix is used here,
and provide a .name member in case matching should look at the whole
string. This is what we want.
Signed-off-by: Auke Kok <auke.kok@versity.com>
The aio_read and aio_write callbacks are no longer used by newer
kernels which now uses iter based readers and writers.
We can avoid implementing plain .read and .write as an iter will
be generated when needed for us automatically.
We add a new data_wait_check_iter() function accordingly.
With these methods removed from the kernel, the el8 kernel no
longer uses the extended ops wrapper struct and is much closer now
to upstream. As a result, a lot of methods are moving around from
inode_dir_operations to and from inode_file_operations etc, and
perhaps things will look a bit more structured as a result.
As a result, we need a slightly different data_wait_check() that
accounts for the iter and offset properly.
Signed-off-by: Auke Kok <auke.kok@versity.com>
.readpages is obsolete in el8 kernels. We implement the .readahead
method instead which is passed a struct readahead_control. We use
the readahead_page(rac) accessor to retrieve page by page from the
struct.
Signed-off-by: Auke Kok <auke.kok@versity.com>
v4.9-12228-g530e9b76ae8f Drops all (un)register_(hot)cpu_notifier()
API functions. From here on we need to use the new cpuhp_* API.
We avoid this entirely for now, at the cost of leaking pages until
the filesystem is unmounted.
Signed-off-by: Auke Kok <auke.kok@versity.com>
v4.16-rc1-1-g9b2c45d479d0
This interface now returns (sizeof (addr)) on success, instead of 0.
Therefore, we have to change the error condition detection.
The compat for older kernels handles the addrlen check internally.
Signed-off-by: Auke Kok <auke.kok@versity.com>
Move to the more recent interfaces for counting and scanning cached
objects to shrink.
Signed-off-by: Zach Brown <zab@versity.com>
Signed-off-by: Auke Kok <auke.kok@versity.com>
Move towards modern bio intefaces, while unfortunately carrying along a
bunch of compat functions that let us still work with the old
incompatible interfaces.
Signed-off-by: Zach Brown <zab@versity.com>
Signed-off-by: Auke Kok <auke.kok@versity.com>
memalloc_nofs_save() was introduced as preferential to trying to use GFP
flags to indicate that a task should not recurse during reclaim. We use
it instead of the _noio_ we were using before.
Signed-off-by: Zach Brown <zab@versity.com>
__percpu_counter_add_batch was renamed to make it clear that the __
doesn't mean it's less safe, as it means in other calls in the API, but
just that it takes an additional parameter.
Signed-off-by: Zach Brown <zab@versity.com>
Signed-off-by: Auke Kok <auke.kok@versity.com>
There are new interfaces available but the old one has been retained
for us to use. In case of older kernels, we will need to fall back
to the previous name of these functions.
Signed-off-by: Auke Kok <auke.kok@versity.com>
Since v4.15-rc3-4-gae5e165d855d, <linux/iversion.h> contains a new
inode->i_version API and it is not included by default.
Signed-off-by: Auke Kok <auke.kok@versity.com>
The new variant of the code that recomputes the augmented value
is designed to handle non-scalar types and to facilitate that, it
has new semantics for the _compute callback. It is now passed a
boolean flag `exit` that indicates that if the value isn't changed,
it should exit and halt propagation.
The callback function now shall return whether that propagation should
stop or not, and not the computed new value. The callback can now
directly update the new computed value in the node.
Signed-off-by: Auke Kok <auke.kok@versity.com>
The modern upstream kernel has a ->iterate() readdir file_operattions
method which takes a context and calls dir_emit(). We add some
kernelcompat helpers to juggle the various function definitions, types,
and arguments to support both the old ->readdir(filldir) and the new
->iterate(ctx) interfaces.
Signed-off-by: Zach Brown <zab@versity.com>
Auke Kok
Zach BrownandAuke Kok
