summaryrefslogtreecommitdiffstats
path: root/include/linux/nfs_page.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/nfs_page.h')
-rw-r--r--include/linux/nfs_page.h30
1 files changed, 24 insertions, 6 deletions
diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index 39e4895..da2e077b 100644
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -20,12 +20,19 @@
#include <asm/atomic.h>
/*
+ * Valid flags for the radix tree
+ */
+#define NFS_PAGE_TAG_DIRTY 0
+#define NFS_PAGE_TAG_WRITEBACK 1
+
+/*
* Valid flags for a dirty buffer
*/
#define PG_BUSY 0
#define PG_NEED_COMMIT 1
#define PG_NEED_RESCHED 2
+struct nfs_inode;
struct nfs_page {
struct list_head wb_list, /* Defines state of page: */
*wb_list_head; /* read/write/commit */
@@ -54,14 +61,17 @@ extern void nfs_clear_request(struct nfs_page *req);
extern void nfs_release_request(struct nfs_page *req);
-extern void nfs_list_add_request(struct nfs_page *, struct list_head *);
-
+extern int nfs_scan_lock_dirty(struct nfs_inode *nfsi, struct list_head *dst,
+ unsigned long idx_start, unsigned int npages);
extern int nfs_scan_list(struct list_head *, struct list_head *,
unsigned long, unsigned int);
extern int nfs_coalesce_requests(struct list_head *, struct list_head *,
unsigned int);
extern int nfs_wait_on_request(struct nfs_page *);
extern void nfs_unlock_request(struct nfs_page *req);
+extern int nfs_set_page_writeback_locked(struct nfs_page *req);
+extern void nfs_clear_page_writeback(struct nfs_page *req);
+
/*
* Lock the page of an asynchronous request without incrementing the wb_count
@@ -86,6 +96,18 @@ nfs_lock_request(struct nfs_page *req)
return 1;
}
+/**
+ * nfs_list_add_request - Insert a request into a list
+ * @req: request
+ * @head: head of list into which to insert the request.
+ */
+static inline void
+nfs_list_add_request(struct nfs_page *req, struct list_head *head)
+{
+ list_add_tail(&req->wb_list, head);
+ req->wb_list_head = head;
+}
+
/**
* nfs_list_remove_request - Remove a request from its wb_list
@@ -96,10 +118,6 @@ nfs_list_remove_request(struct nfs_page *req)
{
if (list_empty(&req->wb_list))
return;
- if (!NFS_WBACK_BUSY(req)) {
- printk(KERN_ERR "NFS: unlocked request attempted removed from list!\n");
- BUG();
- }
list_del_init(&req->wb_list);
req->wb_list_head = NULL;
}
OpenPOWER on IntegriCloud