On Thu, 28 Jun 2012, Sha Zhengju wrote:
> From: Sha Zhengju <handai.szj@xxxxxxxxxx>
>
> Following we will treat SetPageDirty and dirty page accounting as an integrated
> operation. Filesystems had better use vfs interface directly to avoid those details.
>
> Signed-off-by: Sha Zhengju <handai.szj@xxxxxxxxxx>
> ---
> fs/buffer.c | 2 +-
> fs/ceph/addr.c | 20 ++------------------
> include/linux/buffer_head.h | 2 ++
> 3 files changed, 5 insertions(+), 19 deletions(-)
>
> diff --git a/fs/buffer.c b/fs/buffer.c
> index e8d96b8..55522dd 100644
> --- a/fs/buffer.c
> +++ b/fs/buffer.c
> @@ -610,7 +610,7 @@ EXPORT_SYMBOL(mark_buffer_dirty_inode);
> * If warn is true, then emit a warning if the page is not uptodate and has
> * not been truncated.
> */
> -static int __set_page_dirty(struct page *page,
> +int __set_page_dirty(struct page *page,
> struct address_space *mapping, int warn)
> {
> if (unlikely(!mapping))
This also needs an EXPORT_SYMBOL(__set_page_dirty) to allow ceph to
continue to build as a module.
With that fixed, the ceph bits are a welcome cleanup!
Acked-by: Sage Weil <sage@xxxxxxxxxxx>
> diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
> index 8b67304..d028fbe 100644
> --- a/fs/ceph/addr.c
> +++ b/fs/ceph/addr.c
> @@ -5,6 +5,7 @@
> #include <linux/mm.h>
> #include <linux/pagemap.h>
> #include <linux/writeback.h> /* generic_writepages */
> +#include <linux/buffer_head.h>
> #include <linux/slab.h>
> #include <linux/pagevec.h>
> #include <linux/task_io_accounting_ops.h>
> @@ -73,14 +74,8 @@ static int ceph_set_page_dirty(struct page *page)
> int undo = 0;
> struct ceph_snap_context *snapc;
>
> - if (unlikely(!mapping))
> - return !TestSetPageDirty(page);
> -
> - if (TestSetPageDirty(page)) {
> - dout("%p set_page_dirty %p idx %lu -- already dirty\n",
> - mapping->host, page, page->index);
> + if (!__set_page_dirty(page, mapping, 1))
> return 0;
> - }
>
> inode = mapping->host;
> ci = ceph_inode(inode);
> @@ -107,14 +102,7 @@ static int ceph_set_page_dirty(struct page *page)
> snapc, snapc->seq, snapc->num_snaps);
> spin_unlock(&ci->i_ceph_lock);
>
> - /* now adjust page */
> - spin_lock_irq(&mapping->tree_lock);
> if (page->mapping) { /* Race with truncate? */
> - WARN_ON_ONCE(!PageUptodate(page));
> - account_page_dirtied(page, page->mapping);
> - radix_tree_tag_set(&mapping->page_tree,
> - page_index(page), PAGECACHE_TAG_DIRTY);
> -
> /*
> * Reference snap context in page->private. Also set
> * PagePrivate so that we get invalidatepage callback.
> @@ -126,14 +114,10 @@ static int ceph_set_page_dirty(struct page *page)
> undo = 1;
> }
>
> - spin_unlock_irq(&mapping->tree_lock);
> -
> if (undo)
> /* whoops, we failed to dirty the page */
> ceph_put_wrbuffer_cap_refs(ci, 1, snapc);
>
> - __mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
> -
> BUG_ON(!PageDirty(page));
> return 1;
> }
> diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h
> index 458f497..0a331a8 100644
> --- a/include/linux/buffer_head.h
> +++ b/include/linux/buffer_head.h
> @@ -336,6 +336,8 @@ static inline void lock_buffer(struct buffer_head *bh)
> }
>
> extern int __set_page_dirty_buffers(struct page *page);
> +extern int __set_page_dirty(struct page *page,
> + struct address_space *mapping, int warn);
>
> #else /* CONFIG_BLOCK */
>
> --
> 1.7.1
>
> --
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