/*
* Local function declarations
*/
-static struct nfs_page * nfs_update_request(struct nfs_open_context*,
- struct page *,
- unsigned int, unsigned int);
static void nfs_pageio_init_write(struct nfs_pageio_descriptor *desc,
struct inode *inode, int ioflags);
+static void nfs_redirty_request(struct nfs_page *req);
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 mempool_t *nfs_wdata_mempool;
static mempool_t *nfs_commit_mempool;
-struct nfs_write_data *nfs_commit_alloc(void)
+struct nfs_write_data *nfs_commitdata_alloc(void)
{
struct nfs_write_data *p = mempool_alloc(nfs_commit_mempool, GFP_NOFS);
return p;
}
-static void nfs_commit_rcu_free(struct rcu_head *head)
+void nfs_commit_free(struct nfs_write_data *p)
{
- struct nfs_write_data *p = container_of(head, struct nfs_write_data, task.u.tk_rcu);
if (p && (p->pagevec != &p->page_array[0]))
kfree(p->pagevec);
mempool_free(p, nfs_commit_mempool);
}
-void nfs_commit_free(struct nfs_write_data *wdata)
-{
- call_rcu_bh(&wdata->task.u.tk_rcu, nfs_commit_rcu_free);
-}
-
struct nfs_write_data *nfs_writedata_alloc(unsigned int pagecount)
{
struct nfs_write_data *p = mempool_alloc(nfs_wdata_mempool, GFP_NOFS);
return p;
}
-static void nfs_writedata_rcu_free(struct rcu_head *head)
+static void nfs_writedata_free(struct nfs_write_data *p)
{
- struct nfs_write_data *p = container_of(head, struct nfs_write_data, task.u.tk_rcu);
if (p && (p->pagevec != &p->page_array[0]))
kfree(p->pagevec);
mempool_free(p, nfs_wdata_mempool);
}
-static void nfs_writedata_free(struct nfs_write_data *wdata)
+void nfs_writedata_release(void *data)
{
- call_rcu_bh(&wdata->task.u.tk_rcu, nfs_writedata_rcu_free);
+ struct nfs_write_data *wdata = data;
+
+ put_nfs_open_context(wdata->args.context);
+ nfs_writedata_free(wdata);
}
-void nfs_writedata_release(void *wdata)
+static void nfs_context_set_write_error(struct nfs_open_context *ctx, int error)
{
- nfs_writedata_free(wdata);
+ ctx->error = error;
+ smp_wmb();
+ set_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags);
}
static struct nfs_page *nfs_page_find_request_locked(struct page *page)
static void nfs_grow_file(struct page *page, unsigned int offset, unsigned int count)
{
struct inode *inode = page->mapping->host;
- loff_t end, i_size = i_size_read(inode);
- pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
+ loff_t end, i_size;
+ pgoff_t end_index;
+ spin_lock(&inode->i_lock);
+ i_size = i_size_read(inode);
+ end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
if (i_size > 0 && page->index < end_index)
- return;
+ goto out;
end = ((loff_t)page->index << PAGE_CACHE_SHIFT) + ((loff_t)offset+count);
if (i_size >= end)
- return;
- nfs_inc_stats(inode, NFSIOS_EXTENDWRITE);
+ goto out;
i_size_write(inode, end);
+ nfs_inc_stats(inode, NFSIOS_EXTENDWRITE);
+out:
+ spin_unlock(&inode->i_lock);
}
/* A writeback failed: mark the page as bad, and invalidate the page cache */
return;
if (count != nfs_page_length(page))
return;
- if (count != PAGE_CACHE_SIZE)
- zero_user_page(page, count, PAGE_CACHE_SIZE - count, KM_USER0);
SetPageUptodate(page);
}
-static int nfs_writepage_setup(struct nfs_open_context *ctx, struct page *page,
- unsigned int offset, unsigned int count)
-{
- struct nfs_page *req;
- int ret;
-
- for (;;) {
- req = nfs_update_request(ctx, page, offset, count);
- if (!IS_ERR(req))
- break;
- ret = PTR_ERR(req);
- if (ret != -EBUSY)
- return ret;
- ret = nfs_wb_page(page->mapping->host, page);
- if (ret != 0)
- return ret;
- }
- /* Update file length */
- nfs_grow_file(page, offset, count);
- nfs_unlock_request(req);
- return 0;
-}
-
static int wb_priority(struct writeback_control *wbc)
{
if (wbc->for_reclaim)
struct nfs_server *nfss = NFS_SERVER(inode);
end_page_writeback(page);
- if (atomic_long_dec_return(&nfss->writeback) < NFS_CONGESTION_OFF_THRESH) {
+ if (atomic_long_dec_return(&nfss->writeback) < NFS_CONGESTION_OFF_THRESH)
clear_bdi_congested(&nfss->backing_dev_info, WRITE);
- congestion_end(WRITE);
- }
}
/*
struct page *page)
{
struct inode *inode = page->mapping->host;
- struct nfs_inode *nfsi = NFS_I(inode);
struct nfs_page *req;
int ret;
spin_unlock(&inode->i_lock);
return 0;
}
- if (nfs_lock_request_dontget(req))
+ if (nfs_set_page_tag_locked(req))
break;
/* Note: If we hold the page lock, as is the case in nfs_writepage,
- * then the call to nfs_lock_request_dontget() will always
+ * then the call to nfs_set_page_tag_locked() will always
* succeed provided that someone hasn't already marked the
* request as dirty (in which case we don't care).
*/
return ret;
spin_lock(&inode->i_lock);
}
- if (test_bit(PG_NEED_COMMIT, &req->wb_flags)) {
- /* This request is marked for commit */
+ if (test_bit(PG_CLEAN, &req->wb_flags)) {
spin_unlock(&inode->i_lock);
- nfs_unlock_request(req);
- nfs_pageio_complete(pgio);
- return 0;
+ BUG();
}
if (nfs_set_page_writeback(page) != 0) {
spin_unlock(&inode->i_lock);
BUG();
}
- radix_tree_tag_set(&nfsi->nfs_page_tree, req->wb_index,
- NFS_PAGE_TAG_LOCKED);
spin_unlock(&inode->i_lock);
- nfs_pageio_add_request(pgio, req);
+ if (!nfs_pageio_add_request(pgio, req)) {
+ nfs_redirty_request(req);
+ return pgio->pg_error;
+ }
return 0;
}
struct nfs_inode *nfsi = NFS_I(inode);
int error;
+ error = radix_tree_preload(GFP_NOFS);
+ if (error != 0)
+ goto out;
+
+ /* Lock the request! */
+ nfs_lock_request_dontget(req);
+
+ spin_lock(&inode->i_lock);
error = radix_tree_insert(&nfsi->nfs_page_tree, req->wb_index, req);
- BUG_ON(error == -EEXIST);
- if (error)
- return error;
+ BUG_ON(error);
if (!nfsi->npages) {
igrab(inode);
- nfs_begin_data_update(inode);
if (nfs_have_delegation(inode, FMODE_WRITE))
nfsi->change_attr++;
}
set_page_private(req->wb_page, (unsigned long)req);
nfsi->npages++;
kref_get(&req->wb_kref);
- return 0;
+ radix_tree_tag_set(&nfsi->nfs_page_tree, req->wb_index,
+ NFS_PAGE_TAG_LOCKED);
+ spin_unlock(&inode->i_lock);
+ radix_tree_preload_end();
+out:
+ return error;
}
/*
nfsi->npages--;
if (!nfsi->npages) {
spin_unlock(&inode->i_lock);
- nfs_end_data_update(inode);
iput(inode);
} else
spin_unlock(&inode->i_lock);
}
static void
-nfs_redirty_request(struct nfs_page *req)
+nfs_mark_request_dirty(struct nfs_page *req)
{
__set_page_dirty_nobuffers(req->wb_page);
}
-/*
- * Check if a request is dirty
- */
-static inline int
-nfs_dirty_request(struct nfs_page *req)
-{
- struct page *page = req->wb_page;
-
- if (page == NULL || test_bit(PG_NEED_COMMIT, &req->wb_flags))
- return 0;
- return !PageWriteback(req->wb_page);
-}
-
#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
/*
* Add a request to the inode's commit list.
spin_lock(&inode->i_lock);
nfsi->ncommit++;
- set_bit(PG_NEED_COMMIT, &(req)->wb_flags);
+ set_bit(PG_CLEAN, &(req)->wb_flags);
radix_tree_tag_set(&nfsi->nfs_page_tree,
req->wb_index,
NFS_PAGE_TAG_COMMIT);
spin_unlock(&inode->i_lock);
inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
+ inc_bdi_stat(req->wb_page->mapping->backing_dev_info, BDI_RECLAIMABLE);
__mark_inode_dirty(inode, I_DIRTY_DATASYNC);
}
+static int
+nfs_clear_request_commit(struct nfs_page *req)
+{
+ struct page *page = req->wb_page;
+
+ if (test_and_clear_bit(PG_CLEAN, &(req)->wb_flags)) {
+ dec_zone_page_state(page, NR_UNSTABLE_NFS);
+ dec_bdi_stat(page->mapping->backing_dev_info, BDI_RECLAIMABLE);
+ return 1;
+ }
+ return 0;
+}
+
static inline
int nfs_write_need_commit(struct nfs_write_data *data)
{
static inline
int nfs_reschedule_unstable_write(struct nfs_page *req)
{
- if (test_bit(PG_NEED_COMMIT, &req->wb_flags)) {
+ if (test_and_clear_bit(PG_NEED_COMMIT, &req->wb_flags)) {
nfs_mark_request_commit(req);
return 1;
}
if (test_and_clear_bit(PG_NEED_RESCHED, &req->wb_flags)) {
- nfs_redirty_request(req);
+ nfs_mark_request_dirty(req);
return 1;
}
return 0;
{
}
+static inline int
+nfs_clear_request_commit(struct nfs_page *req)
+{
+ return 0;
+}
+
static inline
int nfs_write_need_commit(struct nfs_write_data *data)
{
/*
* Wait for a request to complete.
*
- * Interruptible by signals only if mounted with intr flag.
+ * Interruptible by fatal signals only.
*/
static int nfs_wait_on_requests_locked(struct inode *inode, pgoff_t idx_start, unsigned int npages)
{
while(!list_empty(head)) {
req = nfs_list_entry(head->next);
- dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
nfs_list_remove_request(req);
- clear_bit(PG_NEED_COMMIT, &(req)->wb_flags);
+ nfs_clear_request_commit(req);
nfs_inode_remove_request(req);
nfs_unlock_request(req);
}
#endif
/*
- * Try to update any existing write request, or create one if there is none.
- * In order to match, the request's credentials must match those of
- * the calling process.
+ * Search for an existing write request, and attempt to update
+ * it to reflect a new dirty region on a given page.
*
- * Note: Should always be called with the Page Lock held!
+ * If the attempt fails, then the existing request is flushed out
+ * to disk.
*/
-static struct nfs_page * nfs_update_request(struct nfs_open_context* ctx,
- struct page *page, unsigned int offset, unsigned int bytes)
+static struct nfs_page *nfs_try_to_update_request(struct inode *inode,
+ struct page *page,
+ unsigned int offset,
+ unsigned int bytes)
{
- struct address_space *mapping = page->mapping;
- struct inode *inode = mapping->host;
- struct nfs_page *req, *new = NULL;
- pgoff_t rqend, end;
+ struct nfs_page *req;
+ unsigned int rqend;
+ unsigned int end;
+ int error;
+
+ if (!PagePrivate(page))
+ return NULL;
end = offset + bytes;
+ spin_lock(&inode->i_lock);
for (;;) {
- /* Loop over all inode entries and see if we find
- * A request for the page we wish to update
- */
- spin_lock(&inode->i_lock);
req = nfs_page_find_request_locked(page);
- if (req) {
- if (!nfs_lock_request_dontget(req)) {
- int error;
-
- spin_unlock(&inode->i_lock);
- error = nfs_wait_on_request(req);
- nfs_release_request(req);
- if (error < 0) {
- if (new)
- nfs_release_request(new);
- return ERR_PTR(error);
- }
- continue;
- }
- spin_unlock(&inode->i_lock);
- if (new)
- nfs_release_request(new);
+ if (req == NULL)
+ goto out_unlock;
+
+ rqend = req->wb_offset + req->wb_bytes;
+ /*
+ * Tell the caller to flush out the request if
+ * the offsets are non-contiguous.
+ * Note: nfs_flush_incompatible() will already
+ * have flushed out requests having wrong owners.
+ */
+ if (offset > rqend
+ || end < req->wb_offset)
+ goto out_flushme;
+
+ if (nfs_set_page_tag_locked(req))
break;
- }
- if (new) {
- int error;
- nfs_lock_request_dontget(new);
- error = nfs_inode_add_request(inode, new);
- if (error) {
- spin_unlock(&inode->i_lock);
- nfs_unlock_request(new);
- return ERR_PTR(error);
- }
- spin_unlock(&inode->i_lock);
- return new;
- }
+ /* The request is locked, so wait and then retry */
spin_unlock(&inode->i_lock);
-
- new = nfs_create_request(ctx, inode, page, offset, bytes);
- if (IS_ERR(new))
- return new;
+ error = nfs_wait_on_request(req);
+ nfs_release_request(req);
+ if (error != 0)
+ goto out_err;
+ spin_lock(&inode->i_lock);
}
- /* We have a request for our page.
- * If the creds don't match, or the
- * page addresses don't match,
- * tell the caller to wait on the conflicting
- * request.
- */
- rqend = req->wb_offset + req->wb_bytes;
- if (req->wb_context != ctx
- || req->wb_page != page
- || !nfs_dirty_request(req)
- || offset > rqend || end < req->wb_offset) {
- nfs_unlock_request(req);
- return ERR_PTR(-EBUSY);
- }
+ if (nfs_clear_request_commit(req))
+ radix_tree_tag_clear(&NFS_I(inode)->nfs_page_tree,
+ req->wb_index, NFS_PAGE_TAG_COMMIT);
/* Okay, the request matches. Update the region */
if (offset < req->wb_offset) {
req->wb_offset = offset;
req->wb_pgbase = offset;
- req->wb_bytes = rqend - req->wb_offset;
}
-
if (end > rqend)
req->wb_bytes = end - req->wb_offset;
+ else
+ req->wb_bytes = rqend - req->wb_offset;
+out_unlock:
+ spin_unlock(&inode->i_lock);
+ return req;
+out_flushme:
+ spin_unlock(&inode->i_lock);
+ nfs_release_request(req);
+ error = nfs_wb_page(inode, page);
+out_err:
+ return ERR_PTR(error);
+}
+
+/*
+ * Try to update an existing write request, or create one if there is none.
+ *
+ * Note: Should always be called with the Page Lock held to prevent races
+ * if we have to add a new request. Also assumes that the caller has
+ * already called nfs_flush_incompatible() if necessary.
+ */
+static struct nfs_page * nfs_setup_write_request(struct nfs_open_context* ctx,
+ struct page *page, unsigned int offset, unsigned int bytes)
+{
+ struct inode *inode = page->mapping->host;
+ struct nfs_page *req;
+ int error;
+ req = nfs_try_to_update_request(inode, page, offset, bytes);
+ if (req != NULL)
+ goto out;
+ req = nfs_create_request(ctx, inode, page, offset, bytes);
+ if (IS_ERR(req))
+ goto out;
+ error = nfs_inode_add_request(inode, req);
+ if (error != 0) {
+ nfs_release_request(req);
+ req = ERR_PTR(error);
+ }
+out:
return req;
}
+static int nfs_writepage_setup(struct nfs_open_context *ctx, struct page *page,
+ unsigned int offset, unsigned int count)
+{
+ struct nfs_page *req;
+
+ req = nfs_setup_write_request(ctx, page, offset, count);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
+ /* Update file length */
+ nfs_grow_file(page, offset, count);
+ nfs_mark_uptodate(page, req->wb_pgbase, req->wb_bytes);
+ nfs_clear_page_tag_locked(req);
+ return 0;
+}
+
int nfs_flush_incompatible(struct file *file, struct page *page)
{
- struct nfs_open_context *ctx = (struct nfs_open_context *)file->private_data;
+ struct nfs_open_context *ctx = nfs_file_open_context(file);
struct nfs_page *req;
int do_flush, status;
/*
req = nfs_page_find_request(page);
if (req == NULL)
return 0;
- do_flush = req->wb_page != page || req->wb_context != ctx
- || !nfs_dirty_request(req);
+ do_flush = req->wb_page != page || req->wb_context != ctx;
nfs_release_request(req);
if (!do_flush)
return 0;
}
/*
+ * If the page cache is marked as unsafe or invalid, then we can't rely on
+ * the PageUptodate() flag. In this case, we will need to turn off
+ * write optimisations that depend on the page contents being correct.
+ */
+static int nfs_write_pageuptodate(struct page *page, struct inode *inode)
+{
+ return PageUptodate(page) &&
+ !(NFS_I(inode)->cache_validity & (NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA));
+}
+
+/*
* Update and possibly write a cached page of an NFS file.
*
* XXX: Keep an eye on generic_file_read to make sure it doesn't do bad
int nfs_updatepage(struct file *file, struct page *page,
unsigned int offset, unsigned int count)
{
- struct nfs_open_context *ctx = (struct nfs_open_context *)file->private_data;
+ struct nfs_open_context *ctx = nfs_file_open_context(file);
struct inode *inode = page->mapping->host;
int status = 0;
nfs_inc_stats(inode, NFSIOS_VFSUPDATEPAGE);
- dprintk("NFS: nfs_updatepage(%s/%s %d@%Ld)\n",
+ dprintk("NFS: nfs_updatepage(%s/%s %d@%lld)\n",
file->f_path.dentry->d_parent->d_name.name,
file->f_path.dentry->d_name.name, count,
- (long long)(page_offset(page) +offset));
+ (long long)(page_offset(page) + offset));
/* If we're not using byte range locks, and we know the page
- * is entirely in cache, it may be more efficient to avoid
- * fragmenting write requests.
+ * is up to date, it may be more efficient to extend the write
+ * to cover the entire page in order to avoid fragmentation
+ * inefficiencies.
*/
- if (PageUptodate(page) && inode->i_flock == NULL && !(file->f_mode & O_SYNC)) {
+ if (nfs_write_pageuptodate(page, inode) &&
+ inode->i_flock == NULL &&
+ !(file->f_flags & O_SYNC)) {
count = max(count + offset, nfs_page_length(page));
offset = 0;
}
status = nfs_writepage_setup(ctx, page, offset, count);
- __set_page_dirty_nobuffers(page);
-
- dprintk("NFS: nfs_updatepage returns %d (isize %Ld)\n",
- status, (long long)i_size_read(inode));
if (status < 0)
nfs_set_pageerror(page);
+ else
+ __set_page_dirty_nobuffers(page);
+
+ dprintk("NFS: nfs_updatepage returns %d (isize %lld)\n",
+ status, (long long)i_size_read(inode));
return status;
}
static void nfs_writepage_release(struct nfs_page *req)
{
- if (PageError(req->wb_page)) {
- nfs_end_page_writeback(req->wb_page);
- nfs_inode_remove_request(req);
- } else if (!nfs_reschedule_unstable_write(req)) {
- /* Set the PG_uptodate flag */
- nfs_mark_uptodate(req->wb_page, req->wb_pgbase, req->wb_bytes);
+ if (PageError(req->wb_page) || !nfs_reschedule_unstable_write(req)) {
nfs_end_page_writeback(req->wb_page);
nfs_inode_remove_request(req);
} else
nfs_clear_page_tag_locked(req);
}
-static inline int flush_task_priority(int how)
+static int flush_task_priority(int how)
{
switch (how & (FLUSH_HIGHPRI|FLUSH_LOWPRI)) {
case FLUSH_HIGHPRI:
/*
* Set up the argument/result storage required for the RPC call.
*/
-static void nfs_write_rpcsetup(struct nfs_page *req,
+static int 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 inode *inode;
- int flags;
+ struct inode *inode = req->wb_context->path.dentry->d_inode;
+ int flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
+ int priority = flush_task_priority(how);
+ struct rpc_task *task;
+ struct rpc_message msg = {
+ .rpc_argp = &data->args,
+ .rpc_resp = &data->res,
+ .rpc_cred = req->wb_context->cred,
+ };
+ struct rpc_task_setup task_setup_data = {
+ .rpc_client = NFS_CLIENT(inode),
+ .task = &data->task,
+ .rpc_message = &msg,
+ .callback_ops = call_ops,
+ .callback_data = data,
+ .workqueue = nfsiod_workqueue,
+ .flags = flags,
+ .priority = priority,
+ };
/* Set up the RPC argument and reply structs
* NB: take care not to mess about with data->commit et al. */
data->req = req;
data->inode = inode = req->wb_context->path.dentry->d_inode;
- data->cred = req->wb_context->cred;
+ data->cred = msg.rpc_cred;
data->args.fh = NFS_FH(inode);
data->args.offset = req_offset(req) + offset;
data->args.pgbase = req->wb_pgbase + offset;
data->args.pages = data->pagevec;
data->args.count = count;
- data->args.context = req->wb_context;
+ data->args.context = get_nfs_open_context(req->wb_context);
+ data->args.stable = NFS_UNSTABLE;
+ if (how & FLUSH_STABLE) {
+ data->args.stable = NFS_DATA_SYNC;
+ if (!NFS_I(inode)->ncommit)
+ data->args.stable = NFS_FILE_SYNC;
+ }
data->res.fattr = &data->fattr;
data->res.count = count;
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;
+ NFS_PROTO(inode)->write_setup(data, &msg);
dprintk("NFS: %5u initiated write call "
- "(req %s/%Ld, %u bytes @ offset %Lu)\n",
+ "(req %s/%lld, %u bytes @ offset %llu)\n",
data->task.tk_pid,
inode->i_sb->s_id,
(long long)NFS_FILEID(inode),
count,
(unsigned long long)data->args.offset);
+
+ task = rpc_run_task(&task_setup_data);
+ if (IS_ERR(task))
+ return PTR_ERR(task);
+ rpc_put_task(task);
+ return 0;
}
-static void nfs_execute_write(struct nfs_write_data *data)
+/* If a nfs_flush_* function fails, it should remove reqs from @head and
+ * call this on each, which will prepare them to be retried on next
+ * writeback using standard nfs.
+ */
+static void nfs_redirty_request(struct nfs_page *req)
{
- struct rpc_clnt *clnt = NFS_CLIENT(data->inode);
- sigset_t oldset;
-
- rpc_clnt_sigmask(clnt, &oldset);
- rpc_execute(&data->task);
- rpc_clnt_sigunmask(clnt, &oldset);
+ nfs_mark_request_dirty(req);
+ nfs_end_page_writeback(req->wb_page);
+ nfs_clear_page_tag_locked(req);
}
/*
size_t wsize = NFS_SERVER(inode)->wsize, nbytes;
unsigned int offset;
int requests = 0;
+ int ret = 0;
LIST_HEAD(list);
nfs_list_remove_request(req);
offset = 0;
nbytes = count;
do {
+ int ret2;
+
data = list_entry(list.next, struct nfs_write_data, pages);
list_del_init(&data->pages);
if (nbytes < wsize)
wsize = nbytes;
- nfs_write_rpcsetup(req, data, &nfs_write_partial_ops,
+ ret2 = nfs_write_rpcsetup(req, data, &nfs_write_partial_ops,
wsize, offset, how);
+ if (ret == 0)
+ ret = ret2;
offset += wsize;
nbytes -= wsize;
- nfs_execute_write(data);
} while (nbytes != 0);
- return 0;
+ return ret;
out_bad:
while (!list_empty(&list)) {
nfs_writedata_release(data);
}
nfs_redirty_request(req);
- nfs_end_page_writeback(req->wb_page);
- nfs_clear_page_tag_locked(req);
return -ENOMEM;
}
req = nfs_list_entry(data->pages.next);
/* Set up the argument struct */
- nfs_write_rpcsetup(req, data, &nfs_write_full_ops, count, 0, how);
-
- nfs_execute_write(data);
- return 0;
+ return nfs_write_rpcsetup(req, data, &nfs_write_full_ops, count, 0, how);
out_bad:
while (!list_empty(head)) {
req = nfs_list_entry(head->next);
nfs_list_remove_request(req);
nfs_redirty_request(req);
- nfs_end_page_writeback(req->wb_page);
- nfs_clear_page_tag_locked(req);
}
return -ENOMEM;
}
static void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
struct inode *inode, int ioflags)
{
- int wsize = NFS_SERVER(inode)->wsize;
+ size_t wsize = NFS_SERVER(inode)->wsize;
if (wsize < PAGE_CACHE_SIZE)
nfs_pageio_init(pgio, inode, nfs_flush_multi, wsize, ioflags);
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;
- dprintk("NFS: write (%s/%Ld %d@%Ld)",
- req->wb_context->path.dentry->d_inode->i_sb->s_id,
- (long long)NFS_FILEID(req->wb_context->path.dentry->d_inode),
- req->wb_bytes,
- (long long)req_offset(req));
+ dprintk("NFS: %5u write(%s/%lld %d@%lld)",
+ task->tk_pid,
+ data->req->wb_context->path.dentry->d_inode->i_sb->s_id,
+ (long long)
+ NFS_FILEID(data->req->wb_context->path.dentry->d_inode),
+ data->req->wb_bytes, (long long)req_offset(data->req));
- if (nfs_writeback_done(task, data) != 0)
- return;
+ nfs_writeback_done(task, data);
+}
- if (task->tk_status < 0) {
+static void nfs_writeback_release_partial(void *calldata)
+{
+ struct nfs_write_data *data = calldata;
+ struct nfs_page *req = data->req;
+ struct page *page = req->wb_page;
+ int status = data->task.tk_status;
+
+ if (status < 0) {
nfs_set_pageerror(page);
- req->wb_context->error = task->tk_status;
- dprintk(", error = %d\n", task->tk_status);
+ nfs_context_set_write_error(req->wb_context, status);
+ dprintk(", error = %d\n", status);
goto out;
}
out:
if (atomic_dec_and_test(&req->wb_complete))
nfs_writepage_release(req);
+ nfs_writedata_release(calldata);
}
static const struct rpc_call_ops nfs_write_partial_ops = {
.rpc_call_done = nfs_writeback_done_partial,
- .rpc_release = nfs_writedata_release,
+ .rpc_release = nfs_writeback_release_partial,
};
/*
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;
+ nfs_writeback_done(task, data);
+}
+
+static void nfs_writeback_release_full(void *calldata)
+{
+ struct nfs_write_data *data = calldata;
+ int status = data->task.tk_status;
/* Update attributes as result of writeback. */
while (!list_empty(&data->pages)) {
- req = nfs_list_entry(data->pages.next);
+ struct nfs_page *req = nfs_list_entry(data->pages.next);
+ struct page *page = req->wb_page;
+
nfs_list_remove_request(req);
- page = req->wb_page;
- dprintk("NFS: write (%s/%Ld %d@%Ld)",
+ dprintk("NFS: %5u write (%s/%lld %d@%lld)",
+ data->task.tk_pid,
req->wb_context->path.dentry->d_inode->i_sb->s_id,
(long long)NFS_FILEID(req->wb_context->path.dentry->d_inode),
req->wb_bytes,
(long long)req_offset(req));
- if (task->tk_status < 0) {
+ if (status < 0) {
nfs_set_pageerror(page);
- req->wb_context->error = task->tk_status;
- dprintk(", error = %d\n", task->tk_status);
+ nfs_context_set_write_error(req->wb_context, status);
+ dprintk(", error = %d\n", status);
goto remove_request;
}
dprintk(" marked for commit\n");
goto next;
}
- /* Set the PG_uptodate flag? */
- nfs_mark_uptodate(page, req->wb_pgbase, req->wb_bytes);
dprintk(" OK\n");
remove_request:
nfs_end_page_writeback(page);
next:
nfs_clear_page_tag_locked(req);
}
+ nfs_writedata_release(calldata);
}
static const struct rpc_call_ops nfs_write_full_ops = {
.rpc_call_done = nfs_writeback_done_full,
- .rpc_release = nfs_writedata_release,
+ .rpc_release = nfs_writeback_release_full,
};
static unsigned long complain;
if (time_before(complain, jiffies)) {
- dprintk("NFS: faulty NFS server %s:"
+ dprintk("NFS: faulty NFS server %s:"
" (committed = %d) != (stable = %d)\n",
NFS_SERVER(data->inode)->nfs_client->cl_hostname,
resp->verf->committed, argp->stable);
#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
-void nfs_commit_release(void *wdata)
+void nfs_commitdata_release(void *data)
{
+ struct nfs_write_data *wdata = data;
+
+ put_nfs_open_context(wdata->args.context);
nfs_commit_free(wdata);
}
/*
* Set up the argument/result storage required for the RPC call.
*/
-static void nfs_commit_rpcsetup(struct list_head *head,
+static int nfs_commit_rpcsetup(struct list_head *head,
struct nfs_write_data *data,
int how)
{
- struct nfs_page *first;
- struct inode *inode;
- int flags;
+ struct nfs_page *first = nfs_list_entry(head->next);
+ struct inode *inode = first->wb_context->path.dentry->d_inode;
+ int flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
+ int priority = flush_task_priority(how);
+ struct rpc_task *task;
+ struct rpc_message msg = {
+ .rpc_argp = &data->args,
+ .rpc_resp = &data->res,
+ .rpc_cred = first->wb_context->cred,
+ };
+ struct rpc_task_setup task_setup_data = {
+ .task = &data->task,
+ .rpc_client = NFS_CLIENT(inode),
+ .rpc_message = &msg,
+ .callback_ops = &nfs_commit_ops,
+ .callback_data = data,
+ .workqueue = nfsiod_workqueue,
+ .flags = flags,
+ .priority = priority,
+ };
/* 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);
- inode = first->wb_context->path.dentry->d_inode;
data->inode = inode;
- data->cred = first->wb_context->cred;
+ data->cred = msg.rpc_cred;
data->args.fh = NFS_FH(data->inode);
/* Note: we always request a commit of the entire inode */
data->args.offset = 0;
data->args.count = 0;
+ data->args.context = get_nfs_open_context(first->wb_context);
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);
+ NFS_PROTO(inode)->commit_setup(data, &msg);
- data->task.tk_priority = flush_task_priority(how);
- data->task.tk_cookie = (unsigned long)inode;
-
dprintk("NFS: %5u initiated commit call\n", data->task.tk_pid);
+
+ task = rpc_run_task(&task_setup_data);
+ if (IS_ERR(task))
+ return PTR_ERR(task);
+ rpc_put_task(task);
+ return 0;
}
/*
struct nfs_write_data *data;
struct nfs_page *req;
- data = nfs_commit_alloc();
+ data = nfs_commitdata_alloc();
if (!data)
goto out_bad;
/* Set up the argument struct */
- nfs_commit_rpcsetup(head, data, how);
-
- nfs_execute_write(data);
- return 0;
+ return nfs_commit_rpcsetup(head, data, how);
out_bad:
while (!list_empty(head)) {
req = nfs_list_entry(head->next);
nfs_list_remove_request(req);
nfs_mark_request_commit(req);
dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
+ dec_bdi_stat(req->wb_page->mapping->backing_dev_info,
+ BDI_RECLAIMABLE);
nfs_clear_page_tag_locked(req);
}
return -ENOMEM;
static void nfs_commit_done(struct rpc_task *task, void *calldata)
{
struct nfs_write_data *data = calldata;
- struct nfs_page *req;
dprintk("NFS: %5u 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;
+}
+
+static void nfs_commit_release(void *calldata)
+{
+ struct nfs_write_data *data = calldata;
+ struct nfs_page *req;
+ int status = data->task.tk_status;
while (!list_empty(&data->pages)) {
req = nfs_list_entry(data->pages.next);
nfs_list_remove_request(req);
- clear_bit(PG_NEED_COMMIT, &(req)->wb_flags);
- dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
+ nfs_clear_request_commit(req);
- dprintk("NFS: commit (%s/%Ld %d@%Ld)",
+ dprintk("NFS: commit (%s/%lld %d@%lld)",
req->wb_context->path.dentry->d_inode->i_sb->s_id,
(long long)NFS_FILEID(req->wb_context->path.dentry->d_inode),
req->wb_bytes,
(long long)req_offset(req));
- if (task->tk_status < 0) {
- req->wb_context->error = task->tk_status;
+ if (status < 0) {
+ nfs_context_set_write_error(req->wb_context, status);
nfs_inode_remove_request(req);
- dprintk(", error = %d\n", task->tk_status);
+ dprintk(", error = %d\n", status);
goto next;
}
* returned by the server against all stored verfs. */
if (!memcmp(req->wb_verf.verifier, data->verf.verifier, sizeof(data->verf.verifier))) {
/* We have a match */
- /* Set the PG_uptodate flag */
- nfs_mark_uptodate(req->wb_page, req->wb_pgbase,
- req->wb_bytes);
nfs_inode_remove_request(req);
dprintk(" OK\n");
goto next;
}
/* We have a mismatch. Write the page again */
dprintk(" mismatch\n");
- nfs_redirty_request(req);
+ nfs_mark_request_dirty(req);
next:
nfs_clear_page_tag_locked(req);
}
+ nfs_commitdata_release(calldata);
}
static const struct rpc_call_ops nfs_commit_ops = {
return ret;
}
-static int nfs_write_mapping(struct address_space *mapping, int how)
+static int __nfs_write_mapping(struct address_space *mapping, struct writeback_control *wbc, int how)
{
- struct writeback_control wbc = {
- .bdi = mapping->backing_dev_info,
- .sync_mode = WB_SYNC_ALL,
- .nr_to_write = LONG_MAX,
- .for_writepages = 1,
- .range_cyclic = 1,
- };
int ret;
- ret = nfs_writepages(mapping, &wbc);
+ ret = nfs_writepages(mapping, wbc);
if (ret < 0)
goto out;
- ret = nfs_sync_mapping_wait(mapping, &wbc, how);
+ ret = nfs_sync_mapping_wait(mapping, wbc, how);
if (ret < 0)
goto out;
return 0;
return ret;
}
+/* Two pass sync: first using WB_SYNC_NONE, then WB_SYNC_ALL */
+static int nfs_write_mapping(struct address_space *mapping, int how)
+{
+ struct writeback_control wbc = {
+ .bdi = mapping->backing_dev_info,
+ .sync_mode = WB_SYNC_NONE,
+ .nr_to_write = LONG_MAX,
+ .range_start = 0,
+ .range_end = LLONG_MAX,
+ .for_writepages = 1,
+ };
+ int ret;
+
+ ret = __nfs_write_mapping(mapping, &wbc, how);
+ if (ret < 0)
+ return ret;
+ wbc.sync_mode = WB_SYNC_ALL;
+ return __nfs_write_mapping(mapping, &wbc, how);
+}
+
/*
* flush the inode to disk.
*/
req = nfs_page_find_request(page);
if (req == NULL)
goto out;
- if (test_bit(PG_NEED_COMMIT, &req->wb_flags)) {
+ if (test_bit(PG_CLEAN, &req->wb_flags)) {
nfs_release_request(req);
break;
}
return ret;
}
-int nfs_wb_page_priority(struct inode *inode, struct page *page, int how)
+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);
};
int ret;
- BUG_ON(!PageLocked(page));
- if (clear_page_dirty_for_io(page)) {
- ret = nfs_writepage_locked(page, &wbc);
+ do {
+ if (clear_page_dirty_for_io(page)) {
+ ret = nfs_writepage_locked(page, &wbc);
+ if (ret < 0)
+ goto out_error;
+ } else if (!PagePrivate(page))
+ break;
+ ret = nfs_sync_mapping_wait(page->mapping, &wbc, how);
if (ret < 0)
- goto out;
- }
- if (!PagePrivate(page))
- return 0;
- ret = nfs_sync_mapping_wait(page->mapping, &wbc, how);
- if (ret >= 0)
- return 0;
-out:
+ goto out_error;
+ } while (PagePrivate(page));
+ return 0;
+out_error:
__mark_inode_dirty(inode, I_DIRTY_PAGES);
return ret;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff