mirror of
https://github.com/torvalds/linux.git
synced 2026-05-12 16:18:45 +02:00
099c81a1f0
fsdev: Add dax_operations for use by famfs. This replicates the functionality from drivers/nvdimm/pmem.c that conventional fs-dax file systems (e.g. xfs) use to support dax read/write/mmap to a daxdev - without which famfs can't sit atop a daxdev. - These methods are based on pmem_dax_ops from drivers/nvdimm/pmem.c - fsdev_dax_direct_access() returns the hpa, pfn and kva. The kva was newly stored as dev_dax->virt_addr by dev_dax_probe(). - The hpa/pfn are used for mmap (dax_iomap_fault()), and the kva is used for read/write (dax_iomap_rw()) - fsdev_dax_recovery_write() and dev_dax_zero_page_range() have not been tested yet. I'm looking for suggestions as to how to test those. - dax-private.h: add dev_dax->cached_size, which fsdev needs to remember. The dev_dax size cannot change while a driver is bound (dev_dax_resize returns -EBUSY if dev->driver is set). Caching the size at probe time allows fsdev's direct_access path can use it without acquiring dax_dev_rwsem (which isn't exported anyway). Signed-off-by: John Groves <john@groves.net> Link: https://patch.msgid.link/0100019d311d415a-bd6af0fe-5445-484c-9d39-210b8170b686-000000@email.amazonses.com Signed-off-by: Ira Weiny <ira.weiny@intel.com> |
||
|---|---|---|
| .. | ||
| hmem | ||
| bus.c | ||
| bus.h | ||
| cxl.c | ||
| dax-private.h | ||
| device.c | ||
| fsdev.c | ||
| Kconfig | ||
| kmem.c | ||
| Makefile | ||
| pmem.c | ||
| super.c | ||