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NFS: Clean up nfs_flush_list() 

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2006-03-20 13:44:50 -05:00
parent deb7d63826
commit 7d46a49f51
1 changed files with 29 additions and 33 deletions
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58
fs/nfs/write.c
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@ -963,7 +963,7 @@ static void nfs_execute_write(struct nfs_write_data *data)
* Generate multiple small requests to write out a single
* contiguous dirty area on one page.
*/
static int nfs_flush_multi(struct list_head *head, struct inode *inode, int how)
static int nfs_flush_multi(struct inode *inode, struct list_head *head, int how)
{
struct nfs_page *req = nfs_list_entry(head->next);
struct page *page = req->wb_page;
@ -1032,16 +1032,13 @@ static int nfs_flush_multi(struct list_head *head, struct inode *inode, int how)
* This is the case if nfs_updatepage detects a conflicting request
* that has been written but not committed.
*/
static int nfs_flush_one(struct list_head *head, struct inode *inode, int how)
static int nfs_flush_one(struct inode *inode, struct list_head *head, int how)
{
struct nfs_page *req;
struct page **pages;
struct nfs_write_data *data;
unsigned int count;
if (NFS_SERVER(inode)->wsize < PAGE_CACHE_SIZE)
return nfs_flush_multi(head, inode, how);
data = nfs_writedata_alloc(NFS_SERVER(inode)->wpages);
if (!data)
goto out_bad;
@ -1074,24 +1071,32 @@ static int nfs_flush_one(struct list_head *head, struct inode *inode, int how)
return -ENOMEM;
}
static int
nfs_flush_list(struct list_head *head, int wpages, int how)
static int nfs_flush_list(struct inode *inode, struct list_head *head, int npages, int how)
{
LIST_HEAD(one_request);
int (*flush_one)(struct inode *, struct list_head *, int);
struct nfs_page *req;
int error = 0;
unsigned int pages = 0;
int wpages = NFS_SERVER(inode)->wpages;
int wsize = NFS_SERVER(inode)->wsize;
int error;
while (!list_empty(head)) {
pages += nfs_coalesce_requests(head, &one_request, wpages);
flush_one = nfs_flush_one;
if (wsize < PAGE_CACHE_SIZE)
flush_one = nfs_flush_multi;
/* For single writes, FLUSH_STABLE is more efficient */
if (npages <= wpages && npages == NFS_I(inode)->npages
&& nfs_list_entry(head->next)->wb_bytes <= wsize)
how |= FLUSH_STABLE;
do {
nfs_coalesce_requests(head, &one_request, wpages);
req = nfs_list_entry(one_request.next);
error = nfs_flush_one(&one_request, req->wb_context->dentry->d_inode, how);
error = flush_one(inode, &one_request, how);
if (error < 0)
break;
}
if (error >= 0)
return pages;
goto out_err;
} while (!list_empty(head));
return 0;
out_err:
while (!list_empty(head)) {
req = nfs_list_entry(head->next);
nfs_list_remove_request(req);
@ -1423,24 +1428,16 @@ static int nfs_flush_inode(struct inode *inode, unsigned long idx_start,
{
struct nfs_inode *nfsi = NFS_I(inode);
LIST_HEAD(head);
int res,
error = 0;
int res;
spin_lock(&nfsi->req_lock);
res = nfs_scan_dirty(inode, &head, idx_start, npages);
spin_unlock(&nfsi->req_lock);
if (res) {
struct nfs_server *server = NFS_SERVER(inode);
/* For single writes, FLUSH_STABLE is more efficient */
if (res == nfsi->npages && nfsi->npages <= server->wpages) {
if (res > 1 || nfs_list_entry(head.next)->wb_bytes <= server->wsize)
how |= FLUSH_STABLE;
}
error = nfs_flush_list(&head, server->wpages, how);
}
int error = nfs_flush_list(inode, &head, res, how);
if (error < 0)
return error;
}
return res;
}
@ -1449,14 +1446,13 @@ int nfs_commit_inode(struct inode *inode, int how)
{
struct nfs_inode *nfsi = NFS_I(inode);
LIST_HEAD(head);
int res,
error = 0;
int res;
spin_lock(&nfsi->req_lock);
res = nfs_scan_commit(inode, &head, 0, 0);
spin_unlock(&nfsi->req_lock);
if (res) {
error = nfs_commit_list(inode, &head, how);
int error = nfs_commit_list(inode, &head, how);
if (error < 0)
return error;
}