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authorTrond Myklebust <Trond.Myklebust@netapp.com>2006-10-09 22:18:38 +0200
committerTrond Myklebust <Trond.Myklebust@netapp.com>2006-12-06 16:46:35 +0100
commit1c75950b9a2254ef08f986e00ad20266ae9ba7f1 (patch)
treecc1a242601b27b8128c8c385f1b858a7b863f155 /fs/nfs/write.c
parentNFS: Clean up nfs_scan_dirty() (diff)
downloadlinux-1c75950b9a2254ef08f986e00ad20266ae9ba7f1.tar.xz
linux-1c75950b9a2254ef08f986e00ad20266ae9ba7f1.zip
NFS: cleanup of nfs_sync_inode_wait()
Allow callers to directly pass it a struct writeback_control. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/write.c')
-rw-r--r--fs/nfs/write.c93
1 files changed, 81 insertions, 12 deletions
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index dbc89fa7e9d5..310fdeca6250 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -80,6 +80,7 @@ static struct nfs_page * nfs_update_request(struct nfs_open_context*,
static int nfs_wait_on_write_congestion(struct address_space *, int);
static int nfs_wait_on_requests(struct inode *, unsigned long, unsigned int);
static long nfs_flush_mapping(struct address_space *mapping, struct writeback_control *wbc, int how);
+static int nfs_wb_page_priority(struct inode *inode, struct page *page, int how);
static const struct rpc_call_ops nfs_write_partial_ops;
static const struct rpc_call_ops nfs_write_full_ops;
static const struct rpc_call_ops nfs_commit_ops;
@@ -1476,29 +1477,38 @@ int nfs_commit_inode(struct inode *inode, int how)
}
#endif
-long nfs_sync_inode_wait(struct inode *inode, unsigned long idx_start,
- unsigned int npages, int how)
+long nfs_sync_mapping_wait(struct address_space *mapping, struct writeback_control *wbc, int how)
{
+ struct inode *inode = mapping->host;
struct nfs_inode *nfsi = NFS_I(inode);
- struct address_space *mapping = inode->i_mapping;
- struct writeback_control wbc = {
- .bdi = mapping->backing_dev_info,
- .sync_mode = WB_SYNC_ALL,
- .nr_to_write = LONG_MAX,
- .range_start = ((loff_t)idx_start) << PAGE_CACHE_SHIFT,
- .range_end = ((loff_t)(idx_start + npages - 1)) << PAGE_CACHE_SHIFT,
- };
+ unsigned long idx_start, idx_end;
+ unsigned int npages = 0;
LIST_HEAD(head);
int nocommit = how & FLUSH_NOCOMMIT;
long pages, ret;
+ /* FIXME */
+ if (wbc->range_cyclic)
+ idx_start = 0;
+ else {
+ idx_start = wbc->range_start >> PAGE_CACHE_SHIFT;
+ idx_end = wbc->range_end >> PAGE_CACHE_SHIFT;
+ if (idx_end > idx_start) {
+ unsigned long l_npages = 1 + idx_end - idx_start;
+ npages = l_npages;
+ if (sizeof(npages) != sizeof(l_npages) &&
+ (unsigned long)npages != l_npages)
+ npages = 0;
+ }
+ }
how &= ~FLUSH_NOCOMMIT;
spin_lock(&nfsi->req_lock);
do {
+ wbc->pages_skipped = 0;
ret = nfs_wait_on_requests_locked(inode, idx_start, npages);
if (ret != 0)
continue;
- pages = nfs_scan_dirty(mapping, &wbc, &head);
+ pages = nfs_scan_dirty(mapping, wbc, &head);
if (pages != 0) {
spin_unlock(&nfsi->req_lock);
if (how & FLUSH_INVALIDATE) {
@@ -1509,11 +1519,16 @@ long nfs_sync_inode_wait(struct inode *inode, unsigned long idx_start,
spin_lock(&nfsi->req_lock);
continue;
}
+ if (wbc->pages_skipped != 0)
+ continue;
if (nocommit)
break;
pages = nfs_scan_commit(inode, &head, idx_start, npages);
- if (pages == 0)
+ if (pages == 0) {
+ if (wbc->pages_skipped != 0)
+ continue;
break;
+ }
if (how & FLUSH_INVALIDATE) {
spin_unlock(&nfsi->req_lock);
nfs_cancel_commit_list(&head);
@@ -1530,6 +1545,60 @@ long nfs_sync_inode_wait(struct inode *inode, unsigned long idx_start,
return ret;
}
+/*
+ * flush the inode to disk.
+ */
+int nfs_wb_all(struct inode *inode)
+{
+ struct address_space *mapping = inode->i_mapping;
+ struct writeback_control wbc = {
+ .bdi = mapping->backing_dev_info,
+ .sync_mode = WB_SYNC_ALL,
+ .nr_to_write = LONG_MAX,
+ .range_cyclic = 1,
+ };
+ int ret;
+
+ ret = nfs_sync_mapping_wait(mapping, &wbc, 0);
+ if (ret >= 0)
+ return 0;
+ return ret;
+}
+
+int nfs_sync_mapping_range(struct address_space *mapping, loff_t range_start, loff_t range_end, int how)
+{
+ struct writeback_control wbc = {
+ .bdi = mapping->backing_dev_info,
+ .sync_mode = WB_SYNC_ALL,
+ .nr_to_write = LONG_MAX,
+ .range_start = range_start,
+ .range_end = range_end,
+ };
+ int ret;
+
+ ret = nfs_sync_mapping_wait(mapping, &wbc, how);
+ if (ret >= 0)
+ return 0;
+ return ret;
+}
+
+static int nfs_wb_page_priority(struct inode *inode, struct page *page, int how)
+{
+ loff_t range_start = page_offset(page);
+ loff_t range_end = range_start + (loff_t)(PAGE_CACHE_SIZE - 1);
+
+ return nfs_sync_mapping_range(inode->i_mapping, range_start, range_end, how | FLUSH_STABLE);
+}
+
+/*
+ * Write back all requests on one page - we do this before reading it.
+ */
+int nfs_wb_page(struct inode *inode, struct page* page)
+{
+ return nfs_wb_page_priority(inode, page, 0);
+}
+
+
int __init nfs_init_writepagecache(void)
{
nfs_wdata_cachep = kmem_cache_create("nfs_write_data",