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Message-ID: <20161003095749.GO6457@quack2.suse.cz>
Date: Mon, 3 Oct 2016 11:57:49 +0200
From: Jan Kara <jack@...e.cz>
To: Ross Zwisler <ross.zwisler@...ux.intel.com>
Cc: linux-kernel@...r.kernel.org, Theodore Ts'o <tytso@....edu>,
Alexander Viro <viro@...iv.linux.org.uk>,
Andreas Dilger <adilger.kernel@...ger.ca>,
Andrew Morton <akpm@...ux-foundation.org>,
Christoph Hellwig <hch@....de>,
Dan Williams <dan.j.williams@...el.com>,
Dave Chinner <david@...morbit.com>, Jan Kara <jack@...e.com>,
Matthew Wilcox <mawilcox@...rosoft.com>,
linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
linux-mm@...ck.org, linux-nvdimm@...ts.01.org,
linux-xfs@...r.kernel.org
Subject: Re: [PATCH v4 09/12] dax: correct dax iomap code namespace
On Thu 29-09-16 16:49:27, Ross Zwisler wrote:
> The recently added DAX functions that use the new struct iomap data
> structure were named iomap_dax_rw(), iomap_dax_fault() and
> iomap_dax_actor(). These are actually defined in fs/dax.c, though, so
> should be part of the "dax" namespace and not the "iomap" namespace.
> Rename them to dax_iomap_rw(), dax_iomap_fault() and dax_iomap_actor()
> respectively.
>
> Signed-off-by: Ross Zwisler <ross.zwisler@...ux.intel.com>
> Suggested-by: Dave Chinner <david@...morbit.com>
Looks good. You can add:
Reviewed-by: Jan Kara <jack@...e.cz>
Honza
> ---
> fs/dax.c | 16 ++++++++--------
> fs/ext2/file.c | 6 +++---
> fs/xfs/xfs_file.c | 8 ++++----
> include/linux/dax.h | 4 ++--
> 4 files changed, 17 insertions(+), 17 deletions(-)
>
> diff --git a/fs/dax.c b/fs/dax.c
> index b5e7b13..6977e5e 100644
> --- a/fs/dax.c
> +++ b/fs/dax.c
> @@ -1024,7 +1024,7 @@ EXPORT_SYMBOL_GPL(dax_truncate_page);
>
> #ifdef CONFIG_FS_IOMAP
> static loff_t
> -iomap_dax_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
> +dax_iomap_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
> struct iomap *iomap)
> {
> struct iov_iter *iter = data;
> @@ -1081,7 +1081,7 @@ iomap_dax_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
> }
>
> /**
> - * iomap_dax_rw - Perform I/O to a DAX file
> + * dax_iomap_rw - Perform I/O to a DAX file
> * @iocb: The control block for this I/O
> * @iter: The addresses to do I/O from or to
> * @ops: iomap ops passed from the file system
> @@ -1091,7 +1091,7 @@ iomap_dax_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
> * and evicting any page cache pages in the region under I/O.
> */
> ssize_t
> -iomap_dax_rw(struct kiocb *iocb, struct iov_iter *iter,
> +dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter,
> struct iomap_ops *ops)
> {
> struct address_space *mapping = iocb->ki_filp->f_mapping;
> @@ -1121,7 +1121,7 @@ iomap_dax_rw(struct kiocb *iocb, struct iov_iter *iter,
>
> while (iov_iter_count(iter)) {
> ret = iomap_apply(inode, pos, iov_iter_count(iter), flags, ops,
> - iter, iomap_dax_actor);
> + iter, dax_iomap_actor);
> if (ret <= 0)
> break;
> pos += ret;
> @@ -1131,10 +1131,10 @@ iomap_dax_rw(struct kiocb *iocb, struct iov_iter *iter,
> iocb->ki_pos += done;
> return done ? done : ret;
> }
> -EXPORT_SYMBOL_GPL(iomap_dax_rw);
> +EXPORT_SYMBOL_GPL(dax_iomap_rw);
>
> /**
> - * iomap_dax_fault - handle a page fault on a DAX file
> + * dax_iomap_fault - handle a page fault on a DAX file
> * @vma: The virtual memory area where the fault occurred
> * @vmf: The description of the fault
> * @ops: iomap ops passed from the file system
> @@ -1143,7 +1143,7 @@ EXPORT_SYMBOL_GPL(iomap_dax_rw);
> * or mkwrite handler for DAX files. Assumes the caller has done all the
> * necessary locking for the page fault to proceed successfully.
> */
> -int iomap_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf,
> +int dax_iomap_fault(struct vm_area_struct *vma, struct vm_fault *vmf,
> struct iomap_ops *ops)
> {
> struct address_space *mapping = vma->vm_file->f_mapping;
> @@ -1245,5 +1245,5 @@ int iomap_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf,
> return VM_FAULT_SIGBUS | major;
> return VM_FAULT_NOPAGE | major;
> }
> -EXPORT_SYMBOL_GPL(iomap_dax_fault);
> +EXPORT_SYMBOL_GPL(dax_iomap_fault);
> #endif /* CONFIG_FS_IOMAP */
> diff --git a/fs/ext2/file.c b/fs/ext2/file.c
> index 0f257f8..32a4913 100644
> --- a/fs/ext2/file.c
> +++ b/fs/ext2/file.c
> @@ -38,7 +38,7 @@ static ssize_t ext2_dax_read_iter(struct kiocb *iocb, struct iov_iter *to)
> return 0; /* skip atime */
>
> inode_lock_shared(inode);
> - ret = iomap_dax_rw(iocb, to, &ext2_iomap_ops);
> + ret = dax_iomap_rw(iocb, to, &ext2_iomap_ops);
> inode_unlock_shared(inode);
>
> file_accessed(iocb->ki_filp);
> @@ -62,7 +62,7 @@ static ssize_t ext2_dax_write_iter(struct kiocb *iocb, struct iov_iter *from)
> if (ret)
> goto out_unlock;
>
> - ret = iomap_dax_rw(iocb, from, &ext2_iomap_ops);
> + ret = dax_iomap_rw(iocb, from, &ext2_iomap_ops);
> if (ret > 0 && iocb->ki_pos > i_size_read(inode)) {
> i_size_write(inode, iocb->ki_pos);
> mark_inode_dirty(inode);
> @@ -99,7 +99,7 @@ static int ext2_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
> }
> down_read(&ei->dax_sem);
>
> - ret = iomap_dax_fault(vma, vmf, &ext2_iomap_ops);
> + ret = dax_iomap_fault(vma, vmf, &ext2_iomap_ops);
>
> up_read(&ei->dax_sem);
> if (vmf->flags & FAULT_FLAG_WRITE)
> diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
> index 882f264..00293d2 100644
> --- a/fs/xfs/xfs_file.c
> +++ b/fs/xfs/xfs_file.c
> @@ -342,7 +342,7 @@ xfs_file_dax_read(
> return 0; /* skip atime */
>
> xfs_rw_ilock(ip, XFS_IOLOCK_SHARED);
> - ret = iomap_dax_rw(iocb, to, &xfs_iomap_ops);
> + ret = dax_iomap_rw(iocb, to, &xfs_iomap_ops);
> xfs_rw_iunlock(ip, XFS_IOLOCK_SHARED);
>
> file_accessed(iocb->ki_filp);
> @@ -721,7 +721,7 @@ xfs_file_dax_write(
>
> trace_xfs_file_dax_write(ip, count, pos);
>
> - ret = iomap_dax_rw(iocb, from, &xfs_iomap_ops);
> + ret = dax_iomap_rw(iocb, from, &xfs_iomap_ops);
> if (ret > 0 && iocb->ki_pos > i_size_read(inode)) {
> i_size_write(inode, iocb->ki_pos);
> error = xfs_setfilesize(ip, pos, ret);
> @@ -1468,7 +1468,7 @@ xfs_filemap_page_mkwrite(
> xfs_ilock(XFS_I(inode), XFS_MMAPLOCK_SHARED);
>
> if (IS_DAX(inode)) {
> - ret = iomap_dax_fault(vma, vmf, &xfs_iomap_ops);
> + ret = dax_iomap_fault(vma, vmf, &xfs_iomap_ops);
> } else {
> ret = iomap_page_mkwrite(vma, vmf, &xfs_iomap_ops);
> ret = block_page_mkwrite_return(ret);
> @@ -1502,7 +1502,7 @@ xfs_filemap_fault(
> * changes to xfs_get_blocks_direct() to map unwritten extent
> * ioend for conversion on read-only mappings.
> */
> - ret = iomap_dax_fault(vma, vmf, &xfs_iomap_ops);
> + ret = dax_iomap_fault(vma, vmf, &xfs_iomap_ops);
> } else
> ret = filemap_fault(vma, vmf);
> xfs_iunlock(XFS_I(inode), XFS_MMAPLOCK_SHARED);
> diff --git a/include/linux/dax.h b/include/linux/dax.h
> index d9a8350..c4a51bb 100644
> --- a/include/linux/dax.h
> +++ b/include/linux/dax.h
> @@ -11,13 +11,13 @@ struct iomap_ops;
> /* We use lowest available exceptional entry bit for locking */
> #define RADIX_DAX_ENTRY_LOCK (1 << RADIX_TREE_EXCEPTIONAL_SHIFT)
>
> -ssize_t iomap_dax_rw(struct kiocb *iocb, struct iov_iter *iter,
> +ssize_t dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter,
> struct iomap_ops *ops);
> ssize_t dax_do_io(struct kiocb *, struct inode *, struct iov_iter *,
> get_block_t, dio_iodone_t, int flags);
> int dax_zero_page_range(struct inode *, loff_t from, unsigned len, get_block_t);
> int dax_truncate_page(struct inode *, loff_t from, get_block_t);
> -int iomap_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf,
> +int dax_iomap_fault(struct vm_area_struct *vma, struct vm_fault *vmf,
> struct iomap_ops *ops);
> int dax_fault(struct vm_area_struct *, struct vm_fault *, get_block_t);
> int dax_delete_mapping_entry(struct address_space *mapping, pgoff_t index);
> --
> 2.7.4
>
>
--
Jan Kara <jack@...e.com>
SUSE Labs, CR
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