* Copyright (C) 1996, 1997, Olaf Kirch <okir@monad.swb.de>
*/
-#include <linux/config.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/smp_lock.h>
#include "delegation.h"
+#include "iostat.h"
#define NFSDBG_FACILITY NFSDBG_PAGECACHE
struct inode *,
struct page *,
unsigned int, unsigned int);
-static void nfs_writeback_done_partial(struct nfs_write_data *, int);
-static void nfs_writeback_done_full(struct nfs_write_data *, int);
static int nfs_wait_on_write_congestion(struct address_space *, int);
static int nfs_wait_on_requests(struct inode *, unsigned long, unsigned int);
static int nfs_flush_inode(struct inode *inode, unsigned long idx_start,
unsigned int npages, 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;
static kmem_cache_t *nfs_wdata_cachep;
-mempool_t *nfs_wdata_mempool;
+static mempool_t *nfs_wdata_mempool;
static mempool_t *nfs_commit_mempool;
static DECLARE_WAIT_QUEUE_HEAD(nfs_write_congestion);
-static inline struct nfs_write_data *nfs_commit_alloc(void)
+struct nfs_write_data *nfs_commit_alloc(unsigned int pagecount)
{
struct nfs_write_data *p = mempool_alloc(nfs_commit_mempool, SLAB_NOFS);
+
if (p) {
memset(p, 0, sizeof(*p));
INIT_LIST_HEAD(&p->pages);
+ if (pagecount <= ARRAY_SIZE(p->page_array))
+ p->pagevec = p->page_array;
+ else {
+ p->pagevec = kcalloc(pagecount, sizeof(struct page *), GFP_NOFS);
+ if (!p->pagevec) {
+ mempool_free(p, nfs_commit_mempool);
+ p = NULL;
+ }
+ }
}
return p;
}
-static inline void nfs_commit_free(struct nfs_write_data *p)
+void nfs_commit_free(struct nfs_write_data *p)
{
+ if (p && (p->pagevec != &p->page_array[0]))
+ kfree(p->pagevec);
mempool_free(p, nfs_commit_mempool);
}
-static void nfs_writedata_release(struct rpc_task *task)
+struct nfs_write_data *nfs_writedata_alloc(unsigned int pagecount)
+{
+ struct nfs_write_data *p = mempool_alloc(nfs_wdata_mempool, SLAB_NOFS);
+
+ if (p) {
+ memset(p, 0, sizeof(*p));
+ INIT_LIST_HEAD(&p->pages);
+ if (pagecount <= ARRAY_SIZE(p->page_array))
+ p->pagevec = p->page_array;
+ else {
+ p->pagevec = kcalloc(pagecount, sizeof(struct page *), GFP_NOFS);
+ if (!p->pagevec) {
+ mempool_free(p, nfs_wdata_mempool);
+ p = NULL;
+ }
+ }
+ }
+ return p;
+}
+
+void nfs_writedata_free(struct nfs_write_data *p)
+{
+ if (p && (p->pagevec != &p->page_array[0]))
+ kfree(p->pagevec);
+ mempool_free(p, nfs_wdata_mempool);
+}
+
+void nfs_writedata_release(void *wdata)
{
- struct nfs_write_data *wdata = (struct nfs_write_data *)task->tk_calldata;
nfs_writedata_free(wdata);
}
end = ((loff_t)page->index << PAGE_CACHE_SHIFT) + ((loff_t)offset+count);
if (i_size >= end)
return;
+ nfs_inc_stats(inode, NFSIOS_EXTENDWRITE);
i_size_write(inode, end);
}
int result, written = 0;
struct nfs_write_data *wdata;
- wdata = nfs_writedata_alloc();
+ wdata = nfs_writedata_alloc(1);
if (!wdata)
return -ENOMEM;
(long long)NFS_FILEID(inode),
count, (long long)(page_offset(page) + offset));
+ set_page_writeback(page);
nfs_begin_data_update(inode);
do {
if (count < wsize)
wdata->args.pgbase += result;
written += result;
count -= result;
+ nfs_add_stats(inode, NFSIOS_SERVERWRITTENBYTES, result);
} while (count);
/* Update file length */
nfs_grow_file(page, offset, written);
ClearPageError(page);
io_error:
- nfs_end_data_update_defer(inode);
+ nfs_end_data_update(inode);
+ end_page_writeback(page);
nfs_writedata_free(wdata);
return written ? written : result;
}
unsigned int offset, unsigned int count)
{
struct nfs_page *req;
- int status;
req = nfs_update_request(ctx, inode, page, offset, count);
- status = (IS_ERR(req)) ? PTR_ERR(req) : 0;
- if (status < 0)
- goto out;
+ if (IS_ERR(req))
+ return PTR_ERR(req);
/* Update file length */
nfs_grow_file(page, offset, count);
/* Set the PG_uptodate flag? */
nfs_mark_uptodate(page, offset, count);
nfs_unlock_request(req);
- out:
- return status;
+ return 0;
}
static int wb_priority(struct writeback_control *wbc)
int priority = wb_priority(wbc);
int err;
+ nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGE);
+ nfs_add_stats(inode, NFSIOS_WRITEPAGES, 1);
+
/*
* Note: We need to ensure that we have a reference to the inode
* if we are to do asynchronous writes. If not, waiting
if (page->index >= end_index+1 || !offset)
goto out;
do_it:
- ctx = nfs_find_open_context(inode, FMODE_WRITE);
+ ctx = nfs_find_open_context(inode, NULL, FMODE_WRITE);
if (ctx == NULL) {
err = -EBADF;
goto out;
lock_kernel();
if (!IS_SYNC(inode) && inode_referenced) {
err = nfs_writepage_async(ctx, inode, page, 0, offset);
- if (err >= 0) {
- err = 0;
- if (wbc->for_reclaim)
- nfs_flush_inode(inode, 0, 0, FLUSH_STABLE);
- }
+ if (!wbc->for_writepages)
+ nfs_flush_inode(inode, 0, 0, wb_priority(wbc));
} else {
err = nfs_writepage_sync(ctx, inode, page, 0,
offset, priority);
struct inode *inode = mapping->host;
int err;
+ nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGES);
+
err = generic_writepages(mapping, wbc);
if (err)
return err;
err = nfs_flush_inode(inode, 0, 0, wb_priority(wbc));
if (err < 0)
goto out;
+ nfs_add_stats(inode, NFSIOS_WRITEPAGES, err);
wbc->nr_to_write -= err;
if (!wbc->nonblocking && wbc->sync_mode == WB_SYNC_ALL) {
err = nfs_wait_on_requests(inode, 0, 0);
if (err < 0)
goto out;
}
- err = nfs_commit_inode(inode, 0, 0, wb_priority(wbc));
+ err = nfs_commit_inode(inode, wb_priority(wbc));
if (err > 0) {
wbc->nr_to_write -= err;
err = 0;
if (nfs_have_delegation(inode, FMODE_WRITE))
nfsi->change_attr++;
}
+ SetPagePrivate(req->wb_page);
nfsi->npages++;
atomic_inc(&req->wb_count);
return 0;
BUG_ON (!NFS_WBACK_BUSY(req));
spin_lock(&nfsi->req_lock);
+ ClearPagePrivate(req->wb_page);
radix_tree_delete(&nfsi->nfs_page_tree, req->wb_index);
nfsi->npages--;
if (!nfsi->npages) {
spin_unlock(&nfsi->req_lock);
- nfs_end_data_update_defer(inode);
+ nfs_end_data_update(inode);
iput(inode);
} else
spin_unlock(&nfsi->req_lock);
struct nfs_inode *nfsi = NFS_I(inode);
spin_lock(&nfsi->req_lock);
+ radix_tree_tag_set(&nfsi->nfs_page_tree,
+ req->wb_index, NFS_PAGE_TAG_DIRTY);
nfs_list_add_request(req, &nfsi->dirty);
nfsi->ndirty++;
spin_unlock(&nfsi->req_lock);
- inc_page_state(nr_dirty);
+ inc_zone_page_state(req->wb_page, NR_FILE_DIRTY);
mark_inode_dirty(inode);
}
nfs_list_add_request(req, &nfsi->commit);
nfsi->ncommit++;
spin_unlock(&nfsi->req_lock);
- inc_page_state(nr_unstable);
+ inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
mark_inode_dirty(inode);
}
#endif
*
* Interruptible by signals only if mounted with intr flag.
*/
-static int
-nfs_wait_on_requests(struct inode *inode, unsigned long idx_start, unsigned int npages)
+static int nfs_wait_on_requests_locked(struct inode *inode, unsigned long idx_start, unsigned int npages)
{
struct nfs_inode *nfsi = NFS_I(inode);
struct nfs_page *req;
else
idx_end = idx_start + npages - 1;
- spin_lock(&nfsi->req_lock);
next = idx_start;
- while (radix_tree_gang_lookup(&nfsi->nfs_page_tree, (void **)&req, next, 1)) {
+ while (radix_tree_gang_lookup_tag(&nfsi->nfs_page_tree, (void **)&req, next, 1, NFS_PAGE_TAG_WRITEBACK)) {
if (req->wb_index > idx_end)
break;
next = req->wb_index + 1;
- if (!NFS_WBACK_BUSY(req))
- continue;
+ BUG_ON(!NFS_WBACK_BUSY(req));
atomic_inc(&req->wb_count);
spin_unlock(&nfsi->req_lock);
error = nfs_wait_on_request(req);
nfs_release_request(req);
+ spin_lock(&nfsi->req_lock);
if (error < 0)
return error;
- spin_lock(&nfsi->req_lock);
res++;
}
- spin_unlock(&nfsi->req_lock);
return res;
}
+static int nfs_wait_on_requests(struct inode *inode, unsigned long idx_start, unsigned int npages)
+{
+ struct nfs_inode *nfsi = NFS_I(inode);
+ int ret;
+
+ spin_lock(&nfsi->req_lock);
+ ret = nfs_wait_on_requests_locked(inode, idx_start, npages);
+ spin_unlock(&nfsi->req_lock);
+ return ret;
+}
+
+static void nfs_cancel_requests(struct list_head *head)
+{
+ struct nfs_page *req;
+ while(!list_empty(head)) {
+ req = nfs_list_entry(head->next);
+ nfs_list_remove_request(req);
+ nfs_inode_remove_request(req);
+ nfs_clear_page_writeback(req);
+ }
+}
+
/*
* nfs_scan_dirty - Scan an inode for dirty requests
* @inode: NFS inode to scan
nfs_scan_dirty(struct inode *inode, struct list_head *dst, unsigned long idx_start, unsigned int npages)
{
struct nfs_inode *nfsi = NFS_I(inode);
- int res;
- res = nfs_scan_list(&nfsi->dirty, dst, idx_start, npages);
- nfsi->ndirty -= res;
- sub_page_state(nr_dirty,res);
- if ((nfsi->ndirty == 0) != list_empty(&nfsi->dirty))
- printk(KERN_ERR "NFS: desynchronized value of nfs_i.ndirty.\n");
+ int res = 0;
+
+ if (nfsi->ndirty != 0) {
+ res = nfs_scan_lock_dirty(nfsi, dst, idx_start, npages);
+ nfsi->ndirty -= res;
+ if ((nfsi->ndirty == 0) != list_empty(&nfsi->dirty))
+ printk(KERN_ERR "NFS: desynchronized value of nfs_i.ndirty.\n");
+ }
return res;
}
nfs_scan_commit(struct inode *inode, struct list_head *dst, unsigned long idx_start, unsigned int npages)
{
struct nfs_inode *nfsi = NFS_I(inode);
- int res;
- res = nfs_scan_list(&nfsi->commit, dst, idx_start, npages);
- nfsi->ncommit -= res;
- if ((nfsi->ncommit == 0) != list_empty(&nfsi->commit))
- printk(KERN_ERR "NFS: desynchronized value of nfs_i.ncommit.\n");
+ int res = 0;
+
+ if (nfsi->ncommit != 0) {
+ res = nfs_scan_list(nfsi, &nfsi->commit, dst, idx_start, npages);
+ nfsi->ncommit -= res;
+ if ((nfsi->ncommit == 0) != list_empty(&nfsi->commit))
+ printk(KERN_ERR "NFS: desynchronized value of nfs_i.ncommit.\n");
+ }
return res;
}
+#else
+static inline int nfs_scan_commit(struct inode *inode, struct list_head *dst, unsigned long idx_start, unsigned int npages)
+{
+ return 0;
+}
#endif
static int nfs_wait_on_write_congestion(struct address_space *mapping, int intr)
if (!bdi_write_congested(bdi))
return 0;
+
+ nfs_inc_stats(mapping->host, NFSIOS_CONGESTIONWAIT);
+
if (intr) {
struct rpc_clnt *clnt = NFS_CLIENT(mapping->host);
sigset_t oldset;
spin_unlock(&nfsi->req_lock);
error = nfs_wait_on_request(req);
nfs_release_request(req);
- if (error < 0)
+ if (error < 0) {
+ if (new)
+ nfs_release_request(new);
return ERR_PTR(error);
+ }
continue;
}
spin_unlock(&nfsi->req_lock);
unsigned int offset, unsigned int count)
{
struct nfs_open_context *ctx = (struct nfs_open_context *)file->private_data;
- struct dentry *dentry = file->f_dentry;
struct inode *inode = page->mapping->host;
struct nfs_page *req;
int status = 0;
+ nfs_inc_stats(inode, NFSIOS_VFSUPDATEPAGE);
+
dprintk("NFS: nfs_updatepage(%s/%s %d@%Ld)\n",
- dentry->d_parent->d_name.name, dentry->d_name.name,
- count, (long long)(page_offset(page) +offset));
+ file->f_dentry->d_parent->d_name.name,
+ file->f_dentry->d_name.name, count,
+ (long long)(page_offset(page) +offset));
if (IS_SYNC(inode)) {
status = nfs_writepage_sync(ctx, inode, page, offset, count, 0);
* is entirely in cache, it may be more efficient to avoid
* fragmenting write requests.
*/
- if (PageUptodate(page) && inode->i_flock == NULL) {
+ if (PageUptodate(page) && inode->i_flock == NULL && !(file->f_mode & O_SYNC)) {
loff_t end_offs = i_size_read(inode) - 1;
unsigned long end_index = end_offs >> PAGE_CACHE_SHIFT;
#else
nfs_inode_remove_request(req);
#endif
- nfs_unlock_request(req);
+ nfs_clear_page_writeback(req);
}
static inline int flush_task_priority(int how)
*/
static void nfs_write_rpcsetup(struct nfs_page *req,
struct nfs_write_data *data,
+ const struct rpc_call_ops *call_ops,
unsigned int count, unsigned int offset,
int how)
{
- struct rpc_task *task = &data->task;
struct inode *inode;
+ int flags;
/* Set up the RPC argument and reply structs
* NB: take care not to mess about with data->commit et al. */
data->res.fattr = &data->fattr;
data->res.count = count;
data->res.verf = &data->verf;
+ nfs_fattr_init(&data->fattr);
+ /* Set up the initial task struct. */
+ flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
+ rpc_init_task(&data->task, NFS_CLIENT(inode), flags, call_ops, data);
NFS_PROTO(inode)->write_setup(data, how);
data->task.tk_priority = flush_task_priority(how);
data->task.tk_cookie = (unsigned long)inode;
- data->task.tk_calldata = data;
- /* Release requests */
- data->task.tk_release = nfs_writedata_release;
dprintk("NFS: %4d initiated write call (req %s/%Ld, %u bytes @ offset %Lu)\n",
- task->tk_pid,
+ data->task.tk_pid,
inode->i_sb->s_id,
(long long)NFS_FILEID(inode),
count,
* 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;
nbytes = req->wb_bytes;
for (;;) {
- data = nfs_writedata_alloc();
+ data = nfs_writedata_alloc(1);
if (!data)
goto out_bad;
list_add(&data->pages, &list);
atomic_set(&req->wb_complete, requests);
ClearPageError(page);
- SetPageWriteback(page);
+ set_page_writeback(page);
offset = 0;
nbytes = req->wb_bytes;
do {
list_del_init(&data->pages);
data->pagevec[0] = page;
- data->complete = nfs_writeback_done_partial;
if (nbytes > wsize) {
- nfs_write_rpcsetup(req, data, wsize, offset, how);
+ nfs_write_rpcsetup(req, data, &nfs_write_partial_ops,
+ wsize, offset, how);
offset += wsize;
nbytes -= wsize;
} else {
- nfs_write_rpcsetup(req, data, nbytes, offset, how);
+ nfs_write_rpcsetup(req, data, &nfs_write_partial_ops,
+ nbytes, offset, how);
nbytes = 0;
}
nfs_execute_write(data);
nfs_writedata_free(data);
}
nfs_mark_request_dirty(req);
- nfs_unlock_request(req);
+ nfs_clear_page_writeback(req);
return -ENOMEM;
}
* 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();
+ data = nfs_writedata_alloc(NFS_SERVER(inode)->wpages);
if (!data)
goto out_bad;
nfs_list_remove_request(req);
nfs_list_add_request(req, &data->pages);
ClearPageError(req->wb_page);
- SetPageWriteback(req->wb_page);
+ set_page_writeback(req->wb_page);
*pages++ = req->wb_page;
count += req->wb_bytes;
}
req = nfs_list_entry(data->pages.next);
- data->complete = nfs_writeback_done_full;
/* Set up the argument struct */
- nfs_write_rpcsetup(req, data, count, 0, how);
+ nfs_write_rpcsetup(req, data, &nfs_write_full_ops, count, 0, how);
nfs_execute_write(data);
return 0;
struct nfs_page *req = nfs_list_entry(head->next);
nfs_list_remove_request(req);
nfs_mark_request_dirty(req);
- nfs_unlock_request(req);
+ nfs_clear_page_writeback(req);
}
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);
- struct nfs_page *req;
- int error = 0;
- unsigned int pages = 0;
+ int (*flush_one)(struct inode *, struct list_head *, int);
+ struct nfs_page *req;
+ 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);
nfs_mark_request_dirty(req);
- nfs_unlock_request(req);
+ nfs_clear_page_writeback(req);
}
return error;
}
/*
* Handle a write reply that flushed part of a page.
*/
-static void nfs_writeback_done_partial(struct nfs_write_data *data, int status)
+static void nfs_writeback_done_partial(struct rpc_task *task, void *calldata)
{
+ struct nfs_write_data *data = calldata;
struct nfs_page *req = data->req;
struct page *page = req->wb_page;
req->wb_bytes,
(long long)req_offset(req));
- if (status < 0) {
+ if (nfs_writeback_done(task, data) != 0)
+ return;
+
+ if (task->tk_status < 0) {
ClearPageUptodate(page);
SetPageError(page);
- req->wb_context->error = status;
- dprintk(", error = %d\n", status);
+ req->wb_context->error = task->tk_status;
+ dprintk(", error = %d\n", task->tk_status);
} else {
#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
if (data->verf.committed < NFS_FILE_SYNC) {
nfs_writepage_release(req);
}
+static const struct rpc_call_ops nfs_write_partial_ops = {
+ .rpc_call_done = nfs_writeback_done_partial,
+ .rpc_release = nfs_writedata_release,
+};
+
/*
* Handle a write reply that flushes a whole page.
*
* writebacks since the page->count is kept > 1 for as long
* as the page has a write request pending.
*/
-static void nfs_writeback_done_full(struct nfs_write_data *data, int status)
+static void nfs_writeback_done_full(struct rpc_task *task, void *calldata)
{
+ struct nfs_write_data *data = calldata;
struct nfs_page *req;
struct page *page;
+ if (nfs_writeback_done(task, data) != 0)
+ return;
+
/* Update attributes as result of writeback. */
while (!list_empty(&data->pages)) {
req = nfs_list_entry(data->pages.next);
req->wb_bytes,
(long long)req_offset(req));
- if (status < 0) {
+ if (task->tk_status < 0) {
ClearPageUptodate(page);
SetPageError(page);
- req->wb_context->error = status;
+ req->wb_context->error = task->tk_status;
end_page_writeback(page);
nfs_inode_remove_request(req);
- dprintk(", error = %d\n", status);
+ dprintk(", error = %d\n", task->tk_status);
goto next;
}
end_page_writeback(page);
nfs_inode_remove_request(req);
#endif
next:
- nfs_unlock_request(req);
+ nfs_clear_page_writeback(req);
}
}
+static const struct rpc_call_ops nfs_write_full_ops = {
+ .rpc_call_done = nfs_writeback_done_full,
+ .rpc_release = nfs_writedata_release,
+};
+
+
/*
* This function is called when the WRITE call is complete.
*/
-void nfs_writeback_done(struct rpc_task *task)
+int nfs_writeback_done(struct rpc_task *task, struct nfs_write_data *data)
{
- struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
struct nfs_writeargs *argp = &data->args;
struct nfs_writeres *resp = &data->res;
+ int status;
dprintk("NFS: %4d nfs_writeback_done (status %d)\n",
task->tk_pid, task->tk_status);
+ /* Call the NFS version-specific code */
+ status = NFS_PROTO(data->inode)->write_done(task, data);
+ if (status != 0)
+ return status;
+ nfs_add_stats(data->inode, NFSIOS_SERVERWRITTENBYTES, resp->count);
+
#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
if (resp->verf->committed < argp->stable && task->tk_status >= 0) {
/* We tried a write call, but the server did not
if (task->tk_status >= 0 && resp->count < argp->count) {
static unsigned long complain;
+ nfs_inc_stats(data->inode, NFSIOS_SHORTWRITE);
+
/* Has the server at least made some progress? */
if (resp->count != 0) {
/* Was this an NFSv2 write or an NFSv3 stable write? */
argp->stable = NFS_FILE_SYNC;
}
rpc_restart_call(task);
- return;
+ return -EAGAIN;
}
if (time_before(complain, jiffies)) {
printk(KERN_WARNING
/* Can't do anything about it except throw an error. */
task->tk_status = -EIO;
}
-
- /*
- * Process the nfs_page list
- */
- data->complete(data, task->tk_status);
+ return 0;
}
#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
-static void nfs_commit_release(struct rpc_task *task)
+void nfs_commit_release(void *wdata)
{
- struct nfs_write_data *wdata = (struct nfs_write_data *)task->tk_calldata;
nfs_commit_free(wdata);
}
* Set up the argument/result storage required for the RPC call.
*/
static void nfs_commit_rpcsetup(struct list_head *head,
- struct nfs_write_data *data, int how)
+ struct nfs_write_data *data,
+ int how)
{
- struct rpc_task *task = &data->task;
- struct nfs_page *first, *last;
+ struct nfs_page *first;
struct inode *inode;
- loff_t start, end, len;
+ int flags;
/* Set up the RPC argument and reply structs
* NB: take care not to mess about with data->commit et al. */
list_splice_init(head, &data->pages);
first = nfs_list_entry(data->pages.next);
- last = nfs_list_entry(data->pages.prev);
inode = first->wb_context->dentry->d_inode;
- /*
- * Determine the offset range of requests in the COMMIT call.
- * We rely on the fact that data->pages is an ordered list...
- */
- start = req_offset(first);
- end = req_offset(last) + last->wb_bytes;
- len = end - start;
- /* If 'len' is not a 32-bit quantity, pass '0' in the COMMIT call */
- if (end >= i_size_read(inode) || len < 0 || len > (~((u32)0) >> 1))
- len = 0;
-
data->inode = inode;
data->cred = first->wb_context->cred;
data->args.fh = NFS_FH(data->inode);
- data->args.offset = start;
- data->args.count = len;
- data->res.count = len;
+ /* Note: we always request a commit of the entire inode */
+ data->args.offset = 0;
+ data->args.count = 0;
+ data->res.count = 0;
data->res.fattr = &data->fattr;
data->res.verf = &data->verf;
-
+ nfs_fattr_init(&data->fattr);
+
+ /* Set up the initial task struct. */
+ flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
+ rpc_init_task(&data->task, NFS_CLIENT(inode), flags, &nfs_commit_ops, data);
NFS_PROTO(inode)->commit_setup(data, how);
data->task.tk_priority = flush_task_priority(how);
data->task.tk_cookie = (unsigned long)inode;
- data->task.tk_calldata = data;
- /* Release requests */
- data->task.tk_release = nfs_commit_release;
- dprintk("NFS: %4d initiated commit call\n", task->tk_pid);
+ dprintk("NFS: %4d initiated commit call\n", data->task.tk_pid);
}
/*
* Commit dirty pages
*/
static int
-nfs_commit_list(struct list_head *head, int how)
+nfs_commit_list(struct inode *inode, struct list_head *head, int how)
{
struct nfs_write_data *data;
struct nfs_page *req;
- data = nfs_commit_alloc();
+ data = nfs_commit_alloc(NFS_SERVER(inode)->wpages);
if (!data)
goto out_bad;
req = nfs_list_entry(head->next);
nfs_list_remove_request(req);
nfs_mark_request_commit(req);
- nfs_unlock_request(req);
+ nfs_clear_page_writeback(req);
}
return -ENOMEM;
}
/*
* COMMIT call returned
*/
-void
-nfs_commit_done(struct rpc_task *task)
+static void nfs_commit_done(struct rpc_task *task, void *calldata)
{
- struct nfs_write_data *data = (struct nfs_write_data *)task->tk_calldata;
+ struct nfs_write_data *data = calldata;
struct nfs_page *req;
- int res = 0;
dprintk("NFS: %4d nfs_commit_done (status %d)\n",
task->tk_pid, task->tk_status);
+ /* Call the NFS version-specific code */
+ if (NFS_PROTO(data->inode)->commit_done(task, data) != 0)
+ return;
+
while (!list_empty(&data->pages)) {
req = nfs_list_entry(data->pages.next);
nfs_list_remove_request(req);
+ dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
dprintk("NFS: commit (%s/%Ld %d@%Ld)",
req->wb_context->dentry->d_inode->i_sb->s_id,
dprintk(" mismatch\n");
nfs_mark_request_dirty(req);
next:
- nfs_unlock_request(req);
- res++;
+ nfs_clear_page_writeback(req);
}
- sub_page_state(nr_unstable,res);
+}
+
+static const struct rpc_call_ops nfs_commit_ops = {
+ .rpc_call_done = nfs_commit_done,
+ .rpc_release = nfs_commit_release,
+};
+#else
+static inline int nfs_commit_list(struct inode *inode, struct list_head *head, int how)
+{
+ return 0;
}
#endif
{
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)
- error = nfs_flush_list(&head, NFS_SERVER(inode)->wpages, how);
- if (error < 0)
- return error;
+ if (res) {
+ int error = nfs_flush_list(inode, &head, res, how);
+ if (error < 0)
+ return error;
+ }
return res;
}
#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
-int nfs_commit_inode(struct inode *inode, unsigned long idx_start,
- unsigned int npages, int how)
+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, idx_start, npages);
+ res = nfs_scan_commit(inode, &head, 0, 0);
+ spin_unlock(&nfsi->req_lock);
if (res) {
- res += nfs_scan_commit(inode, &head, 0, 0);
- spin_unlock(&nfsi->req_lock);
- error = nfs_commit_list(&head, how);
- } else
- spin_unlock(&nfsi->req_lock);
- if (error < 0)
- return error;
+ int error = nfs_commit_list(inode, &head, how);
+ if (error < 0)
+ return error;
+ }
return res;
}
#endif
-int nfs_sync_inode(struct inode *inode, unsigned long idx_start,
- unsigned int npages, int how)
+int nfs_sync_inode_wait(struct inode *inode, unsigned long idx_start,
+ unsigned int npages, int how)
{
- int error,
- wait;
-
- wait = how & FLUSH_WAIT;
- how &= ~FLUSH_WAIT;
+ struct nfs_inode *nfsi = NFS_I(inode);
+ LIST_HEAD(head);
+ int nocommit = how & FLUSH_NOCOMMIT;
+ int pages, ret;
+ how &= ~FLUSH_NOCOMMIT;
+ spin_lock(&nfsi->req_lock);
do {
- error = 0;
- if (wait)
- error = nfs_wait_on_requests(inode, idx_start, npages);
- if (error == 0)
- error = nfs_flush_inode(inode, idx_start, npages, how);
-#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
- if (error == 0)
- error = nfs_commit_inode(inode, idx_start, npages, how);
-#endif
- } while (error > 0);
- return error;
+ ret = nfs_wait_on_requests_locked(inode, idx_start, npages);
+ if (ret != 0)
+ continue;
+ pages = nfs_scan_dirty(inode, &head, idx_start, npages);
+ if (pages != 0) {
+ spin_unlock(&nfsi->req_lock);
+ if (how & FLUSH_INVALIDATE)
+ nfs_cancel_requests(&head);
+ else
+ ret = nfs_flush_list(inode, &head, pages, how);
+ spin_lock(&nfsi->req_lock);
+ continue;
+ }
+ if (nocommit)
+ break;
+ pages = nfs_scan_commit(inode, &head, idx_start, npages);
+ if (pages == 0)
+ break;
+ if (how & FLUSH_INVALIDATE) {
+ spin_unlock(&nfsi->req_lock);
+ nfs_cancel_requests(&head);
+ spin_lock(&nfsi->req_lock);
+ continue;
+ }
+ pages += nfs_scan_commit(inode, &head, 0, 0);
+ spin_unlock(&nfsi->req_lock);
+ ret = nfs_commit_list(inode, &head, how);
+ spin_lock(&nfsi->req_lock);
+ } while (ret >= 0);
+ spin_unlock(&nfsi->req_lock);
+ return ret;
}
-int nfs_init_writepagecache(void)
+int __init nfs_init_writepagecache(void)
{
nfs_wdata_cachep = kmem_cache_create("nfs_write_data",
sizeof(struct nfs_write_data),
if (nfs_wdata_cachep == NULL)
return -ENOMEM;
- nfs_wdata_mempool = mempool_create(MIN_POOL_WRITE,
- mempool_alloc_slab,
- mempool_free_slab,
- nfs_wdata_cachep);
+ nfs_wdata_mempool = mempool_create_slab_pool(MIN_POOL_WRITE,
+ nfs_wdata_cachep);
if (nfs_wdata_mempool == NULL)
return -ENOMEM;
- nfs_commit_mempool = mempool_create(MIN_POOL_COMMIT,
- mempool_alloc_slab,
- mempool_free_slab,
- nfs_wdata_cachep);
+ nfs_commit_mempool = mempool_create_slab_pool(MIN_POOL_COMMIT,
+ nfs_wdata_cachep);
if (nfs_commit_mempool == NULL)
return -ENOMEM;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff