| Message ID | 165247892149.4131000.9240706498758561525.stgit@dwillia2-desk3.amr.corp.intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | None | expand |
On Fri, May 13, 2022 at 2:56 PM Dan Williams <dan.j.williams@intel.com> wrote: > > From: Jane Chu <jane.chu@oracle.com> > > Up till now, dax_direct_access() is used implicitly for normal > access, but for the purpose of recovery write, dax range with > poison is requested. To make the interface clear, introduce > enum dax_access_mode { > DAX_ACCESS, > DAX_RECOVERY_WRITE, > } > where DAX_ACCESS is used for normal dax access, and > DAX_RECOVERY_WRITE is used for dax recovery write. > > Suggested-by: Dan Williams <dan.j.williams@intel.com> > Signed-off-by: Jane Chu <jane.chu@oracle.com> > Reviewed-by: Christoph Hellwig <hch@lst.de> > Cc: Vivek Goyal <vgoyal@redhat.com> > Cc: Mike Snitzer <snitzer@redhat.com> > Signed-off-by: Dan Williams <dan.j.williams@intel.com> [..] > diff --git a/tools/testing/nvdimm/pmem-dax.c b/tools/testing/nvdimm/pmem-dax.c > index af19c85558e7..dcc328eba811 100644 > --- a/tools/testing/nvdimm/pmem-dax.c > +++ b/tools/testing/nvdimm/pmem-dax.c > @@ -8,7 +8,8 @@ > #include <nd.h> > > long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff, > - long nr_pages, void **kaddr, pfn_t *pfn) > + long nr_pages, enum dax_access_mode mode, void **kaddr, > + pfn_t *pfn) Local build test reports: tools/testing/nvdimm/pmem-dax.c:11:53: error: parameter 4 (‘mode’) has incomplete type 11 | long nr_pages, enum dax_access_mode mode, void **kaddr, | ~~~~~~~~~~~~~~~~~~~~~^~~~ ...so need to include linux/dax.h in this file now for that definition.
On Fri, May 13, 2022 at 02:55:59PM -0700, Dan Williams wrote: > From: Jane Chu <jane.chu@oracle.com> > > Up till now, dax_direct_access() is used implicitly for normal > access, but for the purpose of recovery write, dax range with > poison is requested. To make the interface clear, introduce > enum dax_access_mode { > DAX_ACCESS, > DAX_RECOVERY_WRITE, > } > where DAX_ACCESS is used for normal dax access, and > DAX_RECOVERY_WRITE is used for dax recovery write. > > Suggested-by: Dan Williams <dan.j.williams@intel.com> > Signed-off-by: Jane Chu <jane.chu@oracle.com> > Reviewed-by: Christoph Hellwig <hch@lst.de> > Cc: Vivek Goyal <vgoyal@redhat.com> > Cc: Mike Snitzer <snitzer@redhat.com> > Signed-off-by: Dan Williams <dan.j.williams@intel.com> > --- > Changes since v9: > - fix a 0-day robot reported missed conversion of virtio_fs to the new > calling convention. > > drivers/dax/super.c | 5 +++-- > drivers/md/dm-linear.c | 5 +++-- > drivers/md/dm-log-writes.c | 5 +++-- > drivers/md/dm-stripe.c | 5 +++-- > drivers/md/dm-target.c | 4 +++- > drivers/md/dm-writecache.c | 7 ++++--- > drivers/md/dm.c | 5 +++-- > drivers/nvdimm/pmem.c | 8 +++++--- > drivers/nvdimm/pmem.h | 5 ++++- > drivers/s390/block/dcssblk.c | 9 ++++++--- > fs/dax.c | 9 +++++---- > fs/fuse/dax.c | 4 ++-- > fs/fuse/virtio_fs.c | 6 ++++-- Looks fine to me from virtio_fs.c perspective. Simple change. Reviewed-by: Vivek Goyal <vgoyal@redhat.com> Thanks Vivek > include/linux/dax.h | 9 +++++++-- > include/linux/device-mapper.h | 4 +++- > tools/testing/nvdimm/pmem-dax.c | 3 ++- > 16 files changed, 60 insertions(+), 33 deletions(-) > > diff --git a/drivers/dax/super.c b/drivers/dax/super.c > index 0211e6f7b47a..5405eb553430 100644 > --- a/drivers/dax/super.c > +++ b/drivers/dax/super.c > @@ -117,6 +117,7 @@ enum dax_device_flags { > * @dax_dev: a dax_device instance representing the logical memory range > * @pgoff: offset in pages from the start of the device to translate > * @nr_pages: number of consecutive pages caller can handle relative to @pfn > + * @mode: indicator on normal access or recovery write > * @kaddr: output parameter that returns a virtual address mapping of pfn > * @pfn: output parameter that returns an absolute pfn translation of @pgoff > * > @@ -124,7 +125,7 @@ enum dax_device_flags { > * pages accessible at the device relative @pgoff. > */ > long dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages, > - void **kaddr, pfn_t *pfn) > + enum dax_access_mode mode, void **kaddr, pfn_t *pfn) > { > long avail; > > @@ -138,7 +139,7 @@ long dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages, > return -EINVAL; > > avail = dax_dev->ops->direct_access(dax_dev, pgoff, nr_pages, > - kaddr, pfn); > + mode, kaddr, pfn); > if (!avail) > return -ERANGE; > return min(avail, nr_pages); > diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c > index 76b486e4d2be..13e263299c9c 100644 > --- a/drivers/md/dm-linear.c > +++ b/drivers/md/dm-linear.c > @@ -172,11 +172,12 @@ static struct dax_device *linear_dax_pgoff(struct dm_target *ti, pgoff_t *pgoff) > } > > static long linear_dax_direct_access(struct dm_target *ti, pgoff_t pgoff, > - long nr_pages, void **kaddr, pfn_t *pfn) > + long nr_pages, enum dax_access_mode mode, void **kaddr, > + pfn_t *pfn) > { > struct dax_device *dax_dev = linear_dax_pgoff(ti, &pgoff); > > - return dax_direct_access(dax_dev, pgoff, nr_pages, kaddr, pfn); > + return dax_direct_access(dax_dev, pgoff, nr_pages, mode, kaddr, pfn); > } > > static int linear_dax_zero_page_range(struct dm_target *ti, pgoff_t pgoff, > diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c > index c9d036d6bb2e..06bdbed65eb1 100644 > --- a/drivers/md/dm-log-writes.c > +++ b/drivers/md/dm-log-writes.c > @@ -889,11 +889,12 @@ static struct dax_device *log_writes_dax_pgoff(struct dm_target *ti, > } > > static long log_writes_dax_direct_access(struct dm_target *ti, pgoff_t pgoff, > - long nr_pages, void **kaddr, pfn_t *pfn) > + long nr_pages, enum dax_access_mode mode, void **kaddr, > + pfn_t *pfn) > { > struct dax_device *dax_dev = log_writes_dax_pgoff(ti, &pgoff); > > - return dax_direct_access(dax_dev, pgoff, nr_pages, kaddr, pfn); > + return dax_direct_access(dax_dev, pgoff, nr_pages, mode, kaddr, pfn); > } > > static int log_writes_dax_zero_page_range(struct dm_target *ti, pgoff_t pgoff, > diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c > index c81d331d1afe..77d72900e997 100644 > --- a/drivers/md/dm-stripe.c > +++ b/drivers/md/dm-stripe.c > @@ -315,11 +315,12 @@ static struct dax_device *stripe_dax_pgoff(struct dm_target *ti, pgoff_t *pgoff) > } > > static long stripe_dax_direct_access(struct dm_target *ti, pgoff_t pgoff, > - long nr_pages, void **kaddr, pfn_t *pfn) > + long nr_pages, enum dax_access_mode mode, void **kaddr, > + pfn_t *pfn) > { > struct dax_device *dax_dev = stripe_dax_pgoff(ti, &pgoff); > > - return dax_direct_access(dax_dev, pgoff, nr_pages, kaddr, pfn); > + return dax_direct_access(dax_dev, pgoff, nr_pages, mode, kaddr, pfn); > } > > static int stripe_dax_zero_page_range(struct dm_target *ti, pgoff_t pgoff, > diff --git a/drivers/md/dm-target.c b/drivers/md/dm-target.c > index 64dd0b34fcf4..8cd5184e62f0 100644 > --- a/drivers/md/dm-target.c > +++ b/drivers/md/dm-target.c > @@ -10,6 +10,7 @@ > #include <linux/init.h> > #include <linux/kmod.h> > #include <linux/bio.h> > +#include <linux/dax.h> > > #define DM_MSG_PREFIX "target" > > @@ -142,7 +143,8 @@ static void io_err_release_clone_rq(struct request *clone, > } > > static long io_err_dax_direct_access(struct dm_target *ti, pgoff_t pgoff, > - long nr_pages, void **kaddr, pfn_t *pfn) > + long nr_pages, enum dax_access_mode mode, void **kaddr, > + pfn_t *pfn) > { > return -EIO; > } > diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c > index 5630b470ba42..d74c5a7a0ab4 100644 > --- a/drivers/md/dm-writecache.c > +++ b/drivers/md/dm-writecache.c > @@ -286,7 +286,8 @@ static int persistent_memory_claim(struct dm_writecache *wc) > > id = dax_read_lock(); > > - da = dax_direct_access(wc->ssd_dev->dax_dev, offset, p, &wc->memory_map, &pfn); > + da = dax_direct_access(wc->ssd_dev->dax_dev, offset, p, DAX_ACCESS, > + &wc->memory_map, &pfn); > if (da < 0) { > wc->memory_map = NULL; > r = da; > @@ -308,8 +309,8 @@ static int persistent_memory_claim(struct dm_writecache *wc) > i = 0; > do { > long daa; > - daa = dax_direct_access(wc->ssd_dev->dax_dev, offset + i, p - i, > - NULL, &pfn); > + daa = dax_direct_access(wc->ssd_dev->dax_dev, offset + i, > + p - i, DAX_ACCESS, NULL, &pfn); > if (daa <= 0) { > r = daa ? daa : -EINVAL; > goto err3; > diff --git a/drivers/md/dm.c b/drivers/md/dm.c > index 82957bd460e8..9c452641c3d5 100644 > --- a/drivers/md/dm.c > +++ b/drivers/md/dm.c > @@ -1093,7 +1093,8 @@ static struct dm_target *dm_dax_get_live_target(struct mapped_device *md, > } > > static long dm_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, > - long nr_pages, void **kaddr, pfn_t *pfn) > + long nr_pages, enum dax_access_mode mode, void **kaddr, > + pfn_t *pfn) > { > struct mapped_device *md = dax_get_private(dax_dev); > sector_t sector = pgoff * PAGE_SECTORS; > @@ -1111,7 +1112,7 @@ static long dm_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, > if (len < 1) > goto out; > nr_pages = min(len, nr_pages); > - ret = ti->type->direct_access(ti, pgoff, nr_pages, kaddr, pfn); > + ret = ti->type->direct_access(ti, pgoff, nr_pages, mode, kaddr, pfn); > > out: > dm_put_live_table(md, srcu_idx); > diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c > index 4aa17132a557..47f34c50f944 100644 > --- a/drivers/nvdimm/pmem.c > +++ b/drivers/nvdimm/pmem.c > @@ -239,7 +239,8 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector, > > /* see "strong" declaration in tools/testing/nvdimm/pmem-dax.c */ > __weak long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff, > - long nr_pages, void **kaddr, pfn_t *pfn) > + long nr_pages, enum dax_access_mode mode, void **kaddr, > + pfn_t *pfn) > { > resource_size_t offset = PFN_PHYS(pgoff) + pmem->data_offset; > > @@ -278,11 +279,12 @@ static int pmem_dax_zero_page_range(struct dax_device *dax_dev, pgoff_t pgoff, > } > > static long pmem_dax_direct_access(struct dax_device *dax_dev, > - pgoff_t pgoff, long nr_pages, void **kaddr, pfn_t *pfn) > + pgoff_t pgoff, long nr_pages, enum dax_access_mode mode, > + void **kaddr, pfn_t *pfn) > { > struct pmem_device *pmem = dax_get_private(dax_dev); > > - return __pmem_direct_access(pmem, pgoff, nr_pages, kaddr, pfn); > + return __pmem_direct_access(pmem, pgoff, nr_pages, mode, kaddr, pfn); > } > > static const struct dax_operations pmem_dax_ops = { > diff --git a/drivers/nvdimm/pmem.h b/drivers/nvdimm/pmem.h > index 1f51a2361429..392b0b38acb9 100644 > --- a/drivers/nvdimm/pmem.h > +++ b/drivers/nvdimm/pmem.h > @@ -8,6 +8,8 @@ > #include <linux/pfn_t.h> > #include <linux/fs.h> > > +enum dax_access_mode; > + > /* this definition is in it's own header for tools/testing/nvdimm to consume */ > struct pmem_device { > /* One contiguous memory region per device */ > @@ -28,7 +30,8 @@ struct pmem_device { > }; > > long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff, > - long nr_pages, void **kaddr, pfn_t *pfn); > + long nr_pages, enum dax_access_mode mode, void **kaddr, > + pfn_t *pfn); > > #ifdef CONFIG_MEMORY_FAILURE > static inline bool test_and_clear_pmem_poison(struct page *page) > diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c > index d614843caf6c..8d0d0eaa3059 100644 > --- a/drivers/s390/block/dcssblk.c > +++ b/drivers/s390/block/dcssblk.c > @@ -32,7 +32,8 @@ static int dcssblk_open(struct block_device *bdev, fmode_t mode); > static void dcssblk_release(struct gendisk *disk, fmode_t mode); > static void dcssblk_submit_bio(struct bio *bio); > static long dcssblk_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, > - long nr_pages, void **kaddr, pfn_t *pfn); > + long nr_pages, enum dax_access_mode mode, void **kaddr, > + pfn_t *pfn); > > static char dcssblk_segments[DCSSBLK_PARM_LEN] = "\0"; > > @@ -50,7 +51,8 @@ static int dcssblk_dax_zero_page_range(struct dax_device *dax_dev, > long rc; > void *kaddr; > > - rc = dax_direct_access(dax_dev, pgoff, nr_pages, &kaddr, NULL); > + rc = dax_direct_access(dax_dev, pgoff, nr_pages, DAX_ACCESS, > + &kaddr, NULL); > if (rc < 0) > return rc; > memset(kaddr, 0, nr_pages << PAGE_SHIFT); > @@ -927,7 +929,8 @@ __dcssblk_direct_access(struct dcssblk_dev_info *dev_info, pgoff_t pgoff, > > static long > dcssblk_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, > - long nr_pages, void **kaddr, pfn_t *pfn) > + long nr_pages, enum dax_access_mode mode, void **kaddr, > + pfn_t *pfn) > { > struct dcssblk_dev_info *dev_info = dax_get_private(dax_dev); > > diff --git a/fs/dax.c b/fs/dax.c > index 67a08a32fccb..ef3103107104 100644 > --- a/fs/dax.c > +++ b/fs/dax.c > @@ -721,7 +721,8 @@ static int copy_cow_page_dax(struct vm_fault *vmf, const struct iomap_iter *iter > int id; > > id = dax_read_lock(); > - rc = dax_direct_access(iter->iomap.dax_dev, pgoff, 1, &kaddr, NULL); > + rc = dax_direct_access(iter->iomap.dax_dev, pgoff, 1, DAX_ACCESS, > + &kaddr, NULL); > if (rc < 0) { > dax_read_unlock(id); > return rc; > @@ -1013,7 +1014,7 @@ static int dax_iomap_pfn(const struct iomap *iomap, loff_t pos, size_t size, > > id = dax_read_lock(); > length = dax_direct_access(iomap->dax_dev, pgoff, PHYS_PFN(size), > - NULL, pfnp); > + DAX_ACCESS, NULL, pfnp); > if (length < 0) { > rc = length; > goto out; > @@ -1122,7 +1123,7 @@ static int dax_memzero(struct dax_device *dax_dev, pgoff_t pgoff, > void *kaddr; > long ret; > > - ret = dax_direct_access(dax_dev, pgoff, 1, &kaddr, NULL); > + ret = dax_direct_access(dax_dev, pgoff, 1, DAX_ACCESS, &kaddr, NULL); > if (ret > 0) { > memset(kaddr + offset, 0, size); > dax_flush(dax_dev, kaddr + offset, size); > @@ -1247,7 +1248,7 @@ static loff_t dax_iomap_iter(const struct iomap_iter *iomi, > } > > map_len = dax_direct_access(dax_dev, pgoff, PHYS_PFN(size), > - &kaddr, NULL); > + DAX_ACCESS, &kaddr, NULL); > if (map_len < 0) { > ret = map_len; > break; > diff --git a/fs/fuse/dax.c b/fs/fuse/dax.c > index d7d3a7f06862..10eb50cbf398 100644 > --- a/fs/fuse/dax.c > +++ b/fs/fuse/dax.c > @@ -1241,8 +1241,8 @@ static int fuse_dax_mem_range_init(struct fuse_conn_dax *fcd) > INIT_DELAYED_WORK(&fcd->free_work, fuse_dax_free_mem_worker); > > id = dax_read_lock(); > - nr_pages = dax_direct_access(fcd->dev, 0, PHYS_PFN(dax_size), NULL, > - NULL); > + nr_pages = dax_direct_access(fcd->dev, 0, PHYS_PFN(dax_size), > + DAX_ACCESS, NULL, NULL); > dax_read_unlock(id); > if (nr_pages < 0) { > pr_debug("dax_direct_access() returned %ld\n", nr_pages); > diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c > index 86b7dbb6a0d4..8db53fa67359 100644 > --- a/fs/fuse/virtio_fs.c > +++ b/fs/fuse/virtio_fs.c > @@ -752,7 +752,8 @@ static void virtio_fs_cleanup_vqs(struct virtio_device *vdev, > * offset. > */ > static long virtio_fs_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, > - long nr_pages, void **kaddr, pfn_t *pfn) > + long nr_pages, enum dax_access_mode mode, > + void **kaddr, pfn_t *pfn) > { > struct virtio_fs *fs = dax_get_private(dax_dev); > phys_addr_t offset = PFN_PHYS(pgoff); > @@ -772,7 +773,8 @@ static int virtio_fs_zero_page_range(struct dax_device *dax_dev, > long rc; > void *kaddr; > > - rc = dax_direct_access(dax_dev, pgoff, nr_pages, &kaddr, NULL); > + rc = dax_direct_access(dax_dev, pgoff, nr_pages, DAX_ACCESS, &kaddr, > + NULL); > if (rc < 0) > return rc; > memset(kaddr, 0, nr_pages << PAGE_SHIFT); > diff --git a/include/linux/dax.h b/include/linux/dax.h > index 9fc5f99a0ae2..3f1339bce3c0 100644 > --- a/include/linux/dax.h > +++ b/include/linux/dax.h > @@ -14,6 +14,11 @@ struct iomap_ops; > struct iomap_iter; > struct iomap; > > +enum dax_access_mode { > + DAX_ACCESS, > + DAX_RECOVERY_WRITE, > +}; > + > struct dax_operations { > /* > * direct_access: translate a device-relative > @@ -21,7 +26,7 @@ struct dax_operations { > * number of pages available for DAX at that pfn. > */ > long (*direct_access)(struct dax_device *, pgoff_t, long, > - void **, pfn_t *); > + enum dax_access_mode, void **, pfn_t *); > /* > * Validate whether this device is usable as an fsdax backing > * device. > @@ -178,7 +183,7 @@ static inline void dax_read_unlock(int id) > bool dax_alive(struct dax_device *dax_dev); > void *dax_get_private(struct dax_device *dax_dev); > long dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages, > - void **kaddr, pfn_t *pfn); > + enum dax_access_mode mode, void **kaddr, pfn_t *pfn); > size_t dax_copy_from_iter(struct dax_device *dax_dev, pgoff_t pgoff, void *addr, > size_t bytes, struct iov_iter *i); > size_t dax_copy_to_iter(struct dax_device *dax_dev, pgoff_t pgoff, void *addr, > diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h > index c2a3758c4aaa..acdedda0d12b 100644 > --- a/include/linux/device-mapper.h > +++ b/include/linux/device-mapper.h > @@ -20,6 +20,7 @@ struct dm_table; > struct dm_report_zones_args; > struct mapped_device; > struct bio_vec; > +enum dax_access_mode; > > /* > * Type of table, mapped_device's mempool and request_queue > @@ -146,7 +147,8 @@ typedef int (*dm_busy_fn) (struct dm_target *ti); > * >= 0 : the number of bytes accessible at the address > */ > typedef long (*dm_dax_direct_access_fn) (struct dm_target *ti, pgoff_t pgoff, > - long nr_pages, void **kaddr, pfn_t *pfn); > + long nr_pages, enum dax_access_mode node, void **kaddr, > + pfn_t *pfn); > typedef int (*dm_dax_zero_page_range_fn)(struct dm_target *ti, pgoff_t pgoff, > size_t nr_pages); > > diff --git a/tools/testing/nvdimm/pmem-dax.c b/tools/testing/nvdimm/pmem-dax.c > index af19c85558e7..dcc328eba811 100644 > --- a/tools/testing/nvdimm/pmem-dax.c > +++ b/tools/testing/nvdimm/pmem-dax.c > @@ -8,7 +8,8 @@ > #include <nd.h> > > long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff, > - long nr_pages, void **kaddr, pfn_t *pfn) > + long nr_pages, enum dax_access_mode mode, void **kaddr, > + pfn_t *pfn) > { > resource_size_t offset = PFN_PHYS(pgoff) + pmem->data_offset; > >
diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 0211e6f7b47a..5405eb553430 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -117,6 +117,7 @@ enum dax_device_flags { * @dax_dev: a dax_device instance representing the logical memory range * @pgoff: offset in pages from the start of the device to translate * @nr_pages: number of consecutive pages caller can handle relative to @pfn + * @mode: indicator on normal access or recovery write * @kaddr: output parameter that returns a virtual address mapping of pfn * @pfn: output parameter that returns an absolute pfn translation of @pgoff * @@ -124,7 +125,7 @@ enum dax_device_flags { * pages accessible at the device relative @pgoff. */ long dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages, - void **kaddr, pfn_t *pfn) + enum dax_access_mode mode, void **kaddr, pfn_t *pfn) { long avail; @@ -138,7 +139,7 @@ long dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages, return -EINVAL; avail = dax_dev->ops->direct_access(dax_dev, pgoff, nr_pages, - kaddr, pfn); + mode, kaddr, pfn); if (!avail) return -ERANGE; return min(avail, nr_pages); diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c index 76b486e4d2be..13e263299c9c 100644 --- a/drivers/md/dm-linear.c +++ b/drivers/md/dm-linear.c @@ -172,11 +172,12 @@ static struct dax_device *linear_dax_pgoff(struct dm_target *ti, pgoff_t *pgoff) } static long linear_dax_direct_access(struct dm_target *ti, pgoff_t pgoff, - long nr_pages, void **kaddr, pfn_t *pfn) + long nr_pages, enum dax_access_mode mode, void **kaddr, + pfn_t *pfn) { struct dax_device *dax_dev = linear_dax_pgoff(ti, &pgoff); - return dax_direct_access(dax_dev, pgoff, nr_pages, kaddr, pfn); + return dax_direct_access(dax_dev, pgoff, nr_pages, mode, kaddr, pfn); } static int linear_dax_zero_page_range(struct dm_target *ti, pgoff_t pgoff, diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c index c9d036d6bb2e..06bdbed65eb1 100644 --- a/drivers/md/dm-log-writes.c +++ b/drivers/md/dm-log-writes.c @@ -889,11 +889,12 @@ static struct dax_device *log_writes_dax_pgoff(struct dm_target *ti, } static long log_writes_dax_direct_access(struct dm_target *ti, pgoff_t pgoff, - long nr_pages, void **kaddr, pfn_t *pfn) + long nr_pages, enum dax_access_mode mode, void **kaddr, + pfn_t *pfn) { struct dax_device *dax_dev = log_writes_dax_pgoff(ti, &pgoff); - return dax_direct_access(dax_dev, pgoff, nr_pages, kaddr, pfn); + return dax_direct_access(dax_dev, pgoff, nr_pages, mode, kaddr, pfn); } static int log_writes_dax_zero_page_range(struct dm_target *ti, pgoff_t pgoff, diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c index c81d331d1afe..77d72900e997 100644 --- a/drivers/md/dm-stripe.c +++ b/drivers/md/dm-stripe.c @@ -315,11 +315,12 @@ static struct dax_device *stripe_dax_pgoff(struct dm_target *ti, pgoff_t *pgoff) } static long stripe_dax_direct_access(struct dm_target *ti, pgoff_t pgoff, - long nr_pages, void **kaddr, pfn_t *pfn) + long nr_pages, enum dax_access_mode mode, void **kaddr, + pfn_t *pfn) { struct dax_device *dax_dev = stripe_dax_pgoff(ti, &pgoff); - return dax_direct_access(dax_dev, pgoff, nr_pages, kaddr, pfn); + return dax_direct_access(dax_dev, pgoff, nr_pages, mode, kaddr, pfn); } static int stripe_dax_zero_page_range(struct dm_target *ti, pgoff_t pgoff, diff --git a/drivers/md/dm-target.c b/drivers/md/dm-target.c index 64dd0b34fcf4..8cd5184e62f0 100644 --- a/drivers/md/dm-target.c +++ b/drivers/md/dm-target.c @@ -10,6 +10,7 @@ #include <linux/init.h> #include <linux/kmod.h> #include <linux/bio.h> +#include <linux/dax.h> #define DM_MSG_PREFIX "target" @@ -142,7 +143,8 @@ static void io_err_release_clone_rq(struct request *clone, } static long io_err_dax_direct_access(struct dm_target *ti, pgoff_t pgoff, - long nr_pages, void **kaddr, pfn_t *pfn) + long nr_pages, enum dax_access_mode mode, void **kaddr, + pfn_t *pfn) { return -EIO; } diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c index 5630b470ba42..d74c5a7a0ab4 100644 --- a/drivers/md/dm-writecache.c +++ b/drivers/md/dm-writecache.c @@ -286,7 +286,8 @@ static int persistent_memory_claim(struct dm_writecache *wc) id = dax_read_lock(); - da = dax_direct_access(wc->ssd_dev->dax_dev, offset, p, &wc->memory_map, &pfn); + da = dax_direct_access(wc->ssd_dev->dax_dev, offset, p, DAX_ACCESS, + &wc->memory_map, &pfn); if (da < 0) { wc->memory_map = NULL; r = da; @@ -308,8 +309,8 @@ static int persistent_memory_claim(struct dm_writecache *wc) i = 0; do { long daa; - daa = dax_direct_access(wc->ssd_dev->dax_dev, offset + i, p - i, - NULL, &pfn); + daa = dax_direct_access(wc->ssd_dev->dax_dev, offset + i, + p - i, DAX_ACCESS, NULL, &pfn); if (daa <= 0) { r = daa ? daa : -EINVAL; goto err3; diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 82957bd460e8..9c452641c3d5 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1093,7 +1093,8 @@ static struct dm_target *dm_dax_get_live_target(struct mapped_device *md, } static long dm_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, - long nr_pages, void **kaddr, pfn_t *pfn) + long nr_pages, enum dax_access_mode mode, void **kaddr, + pfn_t *pfn) { struct mapped_device *md = dax_get_private(dax_dev); sector_t sector = pgoff * PAGE_SECTORS; @@ -1111,7 +1112,7 @@ static long dm_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, if (len < 1) goto out; nr_pages = min(len, nr_pages); - ret = ti->type->direct_access(ti, pgoff, nr_pages, kaddr, pfn); + ret = ti->type->direct_access(ti, pgoff, nr_pages, mode, kaddr, pfn); out: dm_put_live_table(md, srcu_idx); diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 4aa17132a557..47f34c50f944 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -239,7 +239,8 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector, /* see "strong" declaration in tools/testing/nvdimm/pmem-dax.c */ __weak long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff, - long nr_pages, void **kaddr, pfn_t *pfn) + long nr_pages, enum dax_access_mode mode, void **kaddr, + pfn_t *pfn) { resource_size_t offset = PFN_PHYS(pgoff) + pmem->data_offset; @@ -278,11 +279,12 @@ static int pmem_dax_zero_page_range(struct dax_device *dax_dev, pgoff_t pgoff, } static long pmem_dax_direct_access(struct dax_device *dax_dev, - pgoff_t pgoff, long nr_pages, void **kaddr, pfn_t *pfn) + pgoff_t pgoff, long nr_pages, enum dax_access_mode mode, + void **kaddr, pfn_t *pfn) { struct pmem_device *pmem = dax_get_private(dax_dev); - return __pmem_direct_access(pmem, pgoff, nr_pages, kaddr, pfn); + return __pmem_direct_access(pmem, pgoff, nr_pages, mode, kaddr, pfn); } static const struct dax_operations pmem_dax_ops = { diff --git a/drivers/nvdimm/pmem.h b/drivers/nvdimm/pmem.h index 1f51a2361429..392b0b38acb9 100644 --- a/drivers/nvdimm/pmem.h +++ b/drivers/nvdimm/pmem.h @@ -8,6 +8,8 @@ #include <linux/pfn_t.h> #include <linux/fs.h> +enum dax_access_mode; + /* this definition is in it's own header for tools/testing/nvdimm to consume */ struct pmem_device { /* One contiguous memory region per device */ @@ -28,7 +30,8 @@ struct pmem_device { }; long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff, - long nr_pages, void **kaddr, pfn_t *pfn); + long nr_pages, enum dax_access_mode mode, void **kaddr, + pfn_t *pfn); #ifdef CONFIG_MEMORY_FAILURE static inline bool test_and_clear_pmem_poison(struct page *page) diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c index d614843caf6c..8d0d0eaa3059 100644 --- a/drivers/s390/block/dcssblk.c +++ b/drivers/s390/block/dcssblk.c @@ -32,7 +32,8 @@ static int dcssblk_open(struct block_device *bdev, fmode_t mode); static void dcssblk_release(struct gendisk *disk, fmode_t mode); static void dcssblk_submit_bio(struct bio *bio); static long dcssblk_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, - long nr_pages, void **kaddr, pfn_t *pfn); + long nr_pages, enum dax_access_mode mode, void **kaddr, + pfn_t *pfn); static char dcssblk_segments[DCSSBLK_PARM_LEN] = "\0"; @@ -50,7 +51,8 @@ static int dcssblk_dax_zero_page_range(struct dax_device *dax_dev, long rc; void *kaddr; - rc = dax_direct_access(dax_dev, pgoff, nr_pages, &kaddr, NULL); + rc = dax_direct_access(dax_dev, pgoff, nr_pages, DAX_ACCESS, + &kaddr, NULL); if (rc < 0) return rc; memset(kaddr, 0, nr_pages << PAGE_SHIFT); @@ -927,7 +929,8 @@ __dcssblk_direct_access(struct dcssblk_dev_info *dev_info, pgoff_t pgoff, static long dcssblk_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, - long nr_pages, void **kaddr, pfn_t *pfn) + long nr_pages, enum dax_access_mode mode, void **kaddr, + pfn_t *pfn) { struct dcssblk_dev_info *dev_info = dax_get_private(dax_dev); diff --git a/fs/dax.c b/fs/dax.c index 67a08a32fccb..ef3103107104 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -721,7 +721,8 @@ static int copy_cow_page_dax(struct vm_fault *vmf, const struct iomap_iter *iter int id; id = dax_read_lock(); - rc = dax_direct_access(iter->iomap.dax_dev, pgoff, 1, &kaddr, NULL); + rc = dax_direct_access(iter->iomap.dax_dev, pgoff, 1, DAX_ACCESS, + &kaddr, NULL); if (rc < 0) { dax_read_unlock(id); return rc; @@ -1013,7 +1014,7 @@ static int dax_iomap_pfn(const struct iomap *iomap, loff_t pos, size_t size, id = dax_read_lock(); length = dax_direct_access(iomap->dax_dev, pgoff, PHYS_PFN(size), - NULL, pfnp); + DAX_ACCESS, NULL, pfnp); if (length < 0) { rc = length; goto out; @@ -1122,7 +1123,7 @@ static int dax_memzero(struct dax_device *dax_dev, pgoff_t pgoff, void *kaddr; long ret; - ret = dax_direct_access(dax_dev, pgoff, 1, &kaddr, NULL); + ret = dax_direct_access(dax_dev, pgoff, 1, DAX_ACCESS, &kaddr, NULL); if (ret > 0) { memset(kaddr + offset, 0, size); dax_flush(dax_dev, kaddr + offset, size); @@ -1247,7 +1248,7 @@ static loff_t dax_iomap_iter(const struct iomap_iter *iomi, } map_len = dax_direct_access(dax_dev, pgoff, PHYS_PFN(size), - &kaddr, NULL); + DAX_ACCESS, &kaddr, NULL); if (map_len < 0) { ret = map_len; break; diff --git a/fs/fuse/dax.c b/fs/fuse/dax.c index d7d3a7f06862..10eb50cbf398 100644 --- a/fs/fuse/dax.c +++ b/fs/fuse/dax.c @@ -1241,8 +1241,8 @@ static int fuse_dax_mem_range_init(struct fuse_conn_dax *fcd) INIT_DELAYED_WORK(&fcd->free_work, fuse_dax_free_mem_worker); id = dax_read_lock(); - nr_pages = dax_direct_access(fcd->dev, 0, PHYS_PFN(dax_size), NULL, - NULL); + nr_pages = dax_direct_access(fcd->dev, 0, PHYS_PFN(dax_size), + DAX_ACCESS, NULL, NULL); dax_read_unlock(id); if (nr_pages < 0) { pr_debug("dax_direct_access() returned %ld\n", nr_pages); diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c index 86b7dbb6a0d4..8db53fa67359 100644 --- a/fs/fuse/virtio_fs.c +++ b/fs/fuse/virtio_fs.c @@ -752,7 +752,8 @@ static void virtio_fs_cleanup_vqs(struct virtio_device *vdev, * offset. */ static long virtio_fs_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, - long nr_pages, void **kaddr, pfn_t *pfn) + long nr_pages, enum dax_access_mode mode, + void **kaddr, pfn_t *pfn) { struct virtio_fs *fs = dax_get_private(dax_dev); phys_addr_t offset = PFN_PHYS(pgoff); @@ -772,7 +773,8 @@ static int virtio_fs_zero_page_range(struct dax_device *dax_dev, long rc; void *kaddr; - rc = dax_direct_access(dax_dev, pgoff, nr_pages, &kaddr, NULL); + rc = dax_direct_access(dax_dev, pgoff, nr_pages, DAX_ACCESS, &kaddr, + NULL); if (rc < 0) return rc; memset(kaddr, 0, nr_pages << PAGE_SHIFT); diff --git a/include/linux/dax.h b/include/linux/dax.h index 9fc5f99a0ae2..3f1339bce3c0 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -14,6 +14,11 @@ struct iomap_ops; struct iomap_iter; struct iomap; +enum dax_access_mode { + DAX_ACCESS, + DAX_RECOVERY_WRITE, +}; + struct dax_operations { /* * direct_access: translate a device-relative @@ -21,7 +26,7 @@ struct dax_operations { * number of pages available for DAX at that pfn. */ long (*direct_access)(struct dax_device *, pgoff_t, long, - void **, pfn_t *); + enum dax_access_mode, void **, pfn_t *); /* * Validate whether this device is usable as an fsdax backing * device. @@ -178,7 +183,7 @@ static inline void dax_read_unlock(int id) bool dax_alive(struct dax_device *dax_dev); void *dax_get_private(struct dax_device *dax_dev); long dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages, - void **kaddr, pfn_t *pfn); + enum dax_access_mode mode, void **kaddr, pfn_t *pfn); size_t dax_copy_from_iter(struct dax_device *dax_dev, pgoff_t pgoff, void *addr, size_t bytes, struct iov_iter *i); size_t dax_copy_to_iter(struct dax_device *dax_dev, pgoff_t pgoff, void *addr, diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index c2a3758c4aaa..acdedda0d12b 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -20,6 +20,7 @@ struct dm_table; struct dm_report_zones_args; struct mapped_device; struct bio_vec; +enum dax_access_mode; /* * Type of table, mapped_device's mempool and request_queue @@ -146,7 +147,8 @@ typedef int (*dm_busy_fn) (struct dm_target *ti); * >= 0 : the number of bytes accessible at the address */ typedef long (*dm_dax_direct_access_fn) (struct dm_target *ti, pgoff_t pgoff, - long nr_pages, void **kaddr, pfn_t *pfn); + long nr_pages, enum dax_access_mode node, void **kaddr, + pfn_t *pfn); typedef int (*dm_dax_zero_page_range_fn)(struct dm_target *ti, pgoff_t pgoff, size_t nr_pages); diff --git a/tools/testing/nvdimm/pmem-dax.c b/tools/testing/nvdimm/pmem-dax.c index af19c85558e7..dcc328eba811 100644 --- a/tools/testing/nvdimm/pmem-dax.c +++ b/tools/testing/nvdimm/pmem-dax.c @@ -8,7 +8,8 @@ #include <nd.h> long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff, - long nr_pages, void **kaddr, pfn_t *pfn) + long nr_pages, enum dax_access_mode mode, void **kaddr, + pfn_t *pfn) { resource_size_t offset = PFN_PHYS(pgoff) + pmem->data_offset;