| Message ID | 20190416164154.30390-15-rgoldwyn@suse.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | btrfs dax support | expand |
On Tue, Apr 16, 2019 at 11:41:50AM -0500, Goldwyn Rodrigues wrote: > From: Goldwyn Rodrigues <rgoldwyn@suse.com> > > However, this needed more iomap fields, so it was easier > to pass iomap and compute inside the function rather > than passing a log of arguments. > > Note, there is subtle difference between iomap_sector and > dax_iomap_sector(). Can we replace dax_iomap_sector with > iomap_sector()? It would need pos & PAGE_MASK though or else > bdev_dax_pgoff() return -EINVAL. > > Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> > --- > fs/dax.c | 14 ++++++++++---- > fs/iomap.c | 9 +-------- > include/linux/dax.h | 11 +++++------ > include/linux/iomap.h | 6 ++++++ > 4 files changed, 22 insertions(+), 18 deletions(-) > > diff --git a/fs/dax.c b/fs/dax.c > index abbe4a79f219..af94909640ea 100644 > --- a/fs/dax.c > +++ b/fs/dax.c > @@ -1055,11 +1055,15 @@ static bool dax_range_is_aligned(struct block_device *bdev, > return true; > } > > -int __dax_zero_page_range(struct block_device *bdev, > - struct dax_device *dax_dev, sector_t sector, > - unsigned int offset, unsigned int size) > +int __dax_zero_page_range(struct iomap *iomap, loff_t pos, > + unsigned int offset, unsigned int size) > { > - if (dax_range_is_aligned(bdev, offset, size)) { > + sector_t sector = dax_iomap_sector(iomap, pos & PAGE_MASK); > + struct block_device *bdev = iomap->bdev; > + struct dax_device *dax_dev = iomap->dax_dev; > + > + if (!(iomap->type == IOMAP_DAX_COW) && > + dax_range_is_aligned(bdev, offset, size)) { > sector_t start_sector = sector + (offset >> 9); > > return blkdev_issue_zeroout(bdev, start_sector, > @@ -1079,6 +1083,8 @@ int __dax_zero_page_range(struct block_device *bdev, > dax_read_unlock(id); > return rc; > } > + if (iomap->type == IOMAP_DAX_COW) > + memcpy(iomap->inline_data, kaddr, offset); I'm confused, why are we copying into the source page before zeroing some part of the dax device? > memset(kaddr + offset, 0, size); > dax_flush(dax_dev, kaddr + offset, size); > dax_read_unlock(id); > diff --git a/fs/iomap.c b/fs/iomap.c > index abdd18e404f8..90698c854883 100644 > --- a/fs/iomap.c > +++ b/fs/iomap.c > @@ -98,12 +98,6 @@ iomap_apply(struct inode *inode, loff_t pos, loff_t length, unsigned flags, > return written ? written : ret; > } > > -static sector_t > -iomap_sector(struct iomap *iomap, loff_t pos) > -{ > - return (iomap->addr + pos - iomap->offset) >> SECTOR_SHIFT; > -} > - > static struct iomap_page * > iomap_page_create(struct inode *inode, struct page *page) > { > @@ -990,8 +984,7 @@ static int iomap_zero(struct inode *inode, loff_t pos, unsigned offset, > static int iomap_dax_zero(loff_t pos, unsigned offset, unsigned bytes, > struct iomap *iomap) > { > - return __dax_zero_page_range(iomap->bdev, iomap->dax_dev, > - iomap_sector(iomap, pos & PAGE_MASK), offset, bytes); > + return __dax_zero_page_range(iomap, pos, offset, bytes); > } > > static loff_t > diff --git a/include/linux/dax.h b/include/linux/dax.h > index a11bc7b1f526..892c478d7073 100644 > --- a/include/linux/dax.h > +++ b/include/linux/dax.h > @@ -9,6 +9,7 @@ > > typedef unsigned long dax_entry_t; > > +struct iomap; > struct iomap_ops; > struct dax_device; > struct dax_operations { > @@ -161,13 +162,11 @@ int dax_file_range_compare(struct inode *src, loff_t srcoff, struct inode *dest, > loff_t destoff, loff_t len, bool *is_same, const struct iomap_ops *ops); > > #ifdef CONFIG_FS_DAX > -int __dax_zero_page_range(struct block_device *bdev, > - struct dax_device *dax_dev, sector_t sector, > - unsigned int offset, unsigned int length); > +int __dax_zero_page_range(struct iomap *iomap, loff_t pos, > + unsigned int offset, unsigned int size); > #else > -static inline int __dax_zero_page_range(struct block_device *bdev, > - struct dax_device *dax_dev, sector_t sector, > - unsigned int offset, unsigned int length) > +static inline int __dax_zero_page_range(struct iomap *iomap, loff_t pos, > + unsigned int offset, unsigned int size) > { > return -ENXIO; > } > diff --git a/include/linux/iomap.h b/include/linux/iomap.h > index 6e885c5a38a3..3a803566dea1 100644 > --- a/include/linux/iomap.h > +++ b/include/linux/iomap.h > @@ -7,6 +7,7 @@ > #include <linux/mm.h> > #include <linux/types.h> > #include <linux/mm_types.h> > +#include <linux/blkdev.h> > > struct address_space; > struct fiemap_extent_info; > @@ -120,6 +121,11 @@ static inline struct iomap_page *to_iomap_page(struct page *page) > return NULL; > } > > +static inline sector_t iomap_sector(struct iomap *iomap, loff_t pos) > +{ > + return (iomap->addr + pos - iomap->offset) >> SECTOR_SHIFT; Why the double indent? --D > +} > + > ssize_t iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *from, > const struct iomap_ops *ops); > int iomap_readpage(struct page *page, const struct iomap_ops *ops); > -- > 2.16.4 >
On 8:45 17/04, Darrick J. Wong wrote: > On Tue, Apr 16, 2019 at 11:41:50AM -0500, Goldwyn Rodrigues wrote: > > From: Goldwyn Rodrigues <rgoldwyn@suse.com> > > > > However, this needed more iomap fields, so it was easier > > to pass iomap and compute inside the function rather > > than passing a log of arguments. > > > > Note, there is subtle difference between iomap_sector and > > dax_iomap_sector(). Can we replace dax_iomap_sector with > > iomap_sector()? It would need pos & PAGE_MASK though or else > > bdev_dax_pgoff() return -EINVAL. > > > > Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> > > --- > > fs/dax.c | 14 ++++++++++---- > > fs/iomap.c | 9 +-------- > > include/linux/dax.h | 11 +++++------ > > include/linux/iomap.h | 6 ++++++ > > 4 files changed, 22 insertions(+), 18 deletions(-) > > > > diff --git a/fs/dax.c b/fs/dax.c > > index abbe4a79f219..af94909640ea 100644 > > --- a/fs/dax.c > > +++ b/fs/dax.c > > @@ -1055,11 +1055,15 @@ static bool dax_range_is_aligned(struct block_device *bdev, > > return true; > > } > > > > -int __dax_zero_page_range(struct block_device *bdev, > > - struct dax_device *dax_dev, sector_t sector, > > - unsigned int offset, unsigned int size) > > +int __dax_zero_page_range(struct iomap *iomap, loff_t pos, > > + unsigned int offset, unsigned int size) > > { > > - if (dax_range_is_aligned(bdev, offset, size)) { > > + sector_t sector = dax_iomap_sector(iomap, pos & PAGE_MASK); > > + struct block_device *bdev = iomap->bdev; > > + struct dax_device *dax_dev = iomap->dax_dev; > > + > > + if (!(iomap->type == IOMAP_DAX_COW) && > > + dax_range_is_aligned(bdev, offset, size)) { > > sector_t start_sector = sector + (offset >> 9); > > > > return blkdev_issue_zeroout(bdev, start_sector, > > @@ -1079,6 +1083,8 @@ int __dax_zero_page_range(struct block_device *bdev, > > dax_read_unlock(id); > > return rc; > > } > > + if (iomap->type == IOMAP_DAX_COW) > > + memcpy(iomap->inline_data, kaddr, offset); > > I'm confused, why are we copying into the source page before zeroing > some part of the dax device? Clearly my testing was not good enough. This should be - memcpy(kaddr, iomap->inline_data, offset); We copy the part which is not zeroed to new location. > > > memset(kaddr + offset, 0, size); > > dax_flush(dax_dev, kaddr + offset, size); > > dax_read_unlock(id); > > diff --git a/fs/iomap.c b/fs/iomap.c > > index abdd18e404f8..90698c854883 100644 > > --- a/fs/iomap.c > > +++ b/fs/iomap.c > > @@ -98,12 +98,6 @@ iomap_apply(struct inode *inode, loff_t pos, loff_t length, unsigned flags, > > return written ? written : ret; > > } > > > > -static sector_t > > -iomap_sector(struct iomap *iomap, loff_t pos) > > -{ > > - return (iomap->addr + pos - iomap->offset) >> SECTOR_SHIFT; > > -} > > - > > static struct iomap_page * > > iomap_page_create(struct inode *inode, struct page *page) > > { > > @@ -990,8 +984,7 @@ static int iomap_zero(struct inode *inode, loff_t pos, unsigned offset, > > static int iomap_dax_zero(loff_t pos, unsigned offset, unsigned bytes, > > struct iomap *iomap) > > { > > - return __dax_zero_page_range(iomap->bdev, iomap->dax_dev, > > - iomap_sector(iomap, pos & PAGE_MASK), offset, bytes); > > + return __dax_zero_page_range(iomap, pos, offset, bytes); > > } > > > > static loff_t > > diff --git a/include/linux/dax.h b/include/linux/dax.h > > index a11bc7b1f526..892c478d7073 100644 > > --- a/include/linux/dax.h > > +++ b/include/linux/dax.h > > @@ -9,6 +9,7 @@ > > > > typedef unsigned long dax_entry_t; > > > > +struct iomap; > > struct iomap_ops; > > struct dax_device; > > struct dax_operations { > > @@ -161,13 +162,11 @@ int dax_file_range_compare(struct inode *src, loff_t srcoff, struct inode *dest, > > loff_t destoff, loff_t len, bool *is_same, const struct iomap_ops *ops); > > > > #ifdef CONFIG_FS_DAX > > -int __dax_zero_page_range(struct block_device *bdev, > > - struct dax_device *dax_dev, sector_t sector, > > - unsigned int offset, unsigned int length); > > +int __dax_zero_page_range(struct iomap *iomap, loff_t pos, > > + unsigned int offset, unsigned int size); > > #else > > -static inline int __dax_zero_page_range(struct block_device *bdev, > > - struct dax_device *dax_dev, sector_t sector, > > - unsigned int offset, unsigned int length) > > +static inline int __dax_zero_page_range(struct iomap *iomap, loff_t pos, > > + unsigned int offset, unsigned int size) > > { > > return -ENXIO; > > } > > diff --git a/include/linux/iomap.h b/include/linux/iomap.h > > index 6e885c5a38a3..3a803566dea1 100644 > > --- a/include/linux/iomap.h > > +++ b/include/linux/iomap.h > > @@ -7,6 +7,7 @@ > > #include <linux/mm.h> > > #include <linux/types.h> > > #include <linux/mm_types.h> > > +#include <linux/blkdev.h> > > > > struct address_space; > > struct fiemap_extent_info; > > @@ -120,6 +121,11 @@ static inline struct iomap_page *to_iomap_page(struct page *page) > > return NULL; > > } > > > > +static inline sector_t iomap_sector(struct iomap *iomap, loff_t pos) > > +{ > > + return (iomap->addr + pos - iomap->offset) >> SECTOR_SHIFT; > > Why the double indent? Ahh.. I will fix this. > > --D > > > +} > > + > > ssize_t iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *from, > > const struct iomap_ops *ops); > > int iomap_readpage(struct page *page, const struct iomap_ops *ops); > > -- > > 2.16.4 > > >
diff --git a/fs/dax.c b/fs/dax.c index abbe4a79f219..af94909640ea 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -1055,11 +1055,15 @@ static bool dax_range_is_aligned(struct block_device *bdev, return true; } -int __dax_zero_page_range(struct block_device *bdev, - struct dax_device *dax_dev, sector_t sector, - unsigned int offset, unsigned int size) +int __dax_zero_page_range(struct iomap *iomap, loff_t pos, + unsigned int offset, unsigned int size) { - if (dax_range_is_aligned(bdev, offset, size)) { + sector_t sector = dax_iomap_sector(iomap, pos & PAGE_MASK); + struct block_device *bdev = iomap->bdev; + struct dax_device *dax_dev = iomap->dax_dev; + + if (!(iomap->type == IOMAP_DAX_COW) && + dax_range_is_aligned(bdev, offset, size)) { sector_t start_sector = sector + (offset >> 9); return blkdev_issue_zeroout(bdev, start_sector, @@ -1079,6 +1083,8 @@ int __dax_zero_page_range(struct block_device *bdev, dax_read_unlock(id); return rc; } + if (iomap->type == IOMAP_DAX_COW) + memcpy(iomap->inline_data, kaddr, offset); memset(kaddr + offset, 0, size); dax_flush(dax_dev, kaddr + offset, size); dax_read_unlock(id); diff --git a/fs/iomap.c b/fs/iomap.c index abdd18e404f8..90698c854883 100644 --- a/fs/iomap.c +++ b/fs/iomap.c @@ -98,12 +98,6 @@ iomap_apply(struct inode *inode, loff_t pos, loff_t length, unsigned flags, return written ? written : ret; } -static sector_t -iomap_sector(struct iomap *iomap, loff_t pos) -{ - return (iomap->addr + pos - iomap->offset) >> SECTOR_SHIFT; -} - static struct iomap_page * iomap_page_create(struct inode *inode, struct page *page) { @@ -990,8 +984,7 @@ static int iomap_zero(struct inode *inode, loff_t pos, unsigned offset, static int iomap_dax_zero(loff_t pos, unsigned offset, unsigned bytes, struct iomap *iomap) { - return __dax_zero_page_range(iomap->bdev, iomap->dax_dev, - iomap_sector(iomap, pos & PAGE_MASK), offset, bytes); + return __dax_zero_page_range(iomap, pos, offset, bytes); } static loff_t diff --git a/include/linux/dax.h b/include/linux/dax.h index a11bc7b1f526..892c478d7073 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -9,6 +9,7 @@ typedef unsigned long dax_entry_t; +struct iomap; struct iomap_ops; struct dax_device; struct dax_operations { @@ -161,13 +162,11 @@ int dax_file_range_compare(struct inode *src, loff_t srcoff, struct inode *dest, loff_t destoff, loff_t len, bool *is_same, const struct iomap_ops *ops); #ifdef CONFIG_FS_DAX -int __dax_zero_page_range(struct block_device *bdev, - struct dax_device *dax_dev, sector_t sector, - unsigned int offset, unsigned int length); +int __dax_zero_page_range(struct iomap *iomap, loff_t pos, + unsigned int offset, unsigned int size); #else -static inline int __dax_zero_page_range(struct block_device *bdev, - struct dax_device *dax_dev, sector_t sector, - unsigned int offset, unsigned int length) +static inline int __dax_zero_page_range(struct iomap *iomap, loff_t pos, + unsigned int offset, unsigned int size) { return -ENXIO; } diff --git a/include/linux/iomap.h b/include/linux/iomap.h index 6e885c5a38a3..3a803566dea1 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -7,6 +7,7 @@ #include <linux/mm.h> #include <linux/types.h> #include <linux/mm_types.h> +#include <linux/blkdev.h> struct address_space; struct fiemap_extent_info; @@ -120,6 +121,11 @@ static inline struct iomap_page *to_iomap_page(struct page *page) return NULL; } +static inline sector_t iomap_sector(struct iomap *iomap, loff_t pos) +{ + return (iomap->addr + pos - iomap->offset) >> SECTOR_SHIFT; +} + ssize_t iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *from, const struct iomap_ops *ops); int iomap_readpage(struct page *page, const struct iomap_ops *ops);