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NFS: Ensure that the write code cleans up properly when rpc_run_task(…
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…) fails

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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Trond Myklebust authored and Trond Myklebust committed Apr 19, 2008
1 parent fdd1e74 commit c9d8f89
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Showing 3 changed files with 73 additions and 48 deletions.
50 changes: 28 additions & 22 deletions fs/nfs/direct.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -508,27 +508,34 @@ static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq)
static void nfs_direct_commit_result(struct rpc_task *task, void *calldata)
{
struct nfs_write_data *data = calldata;
struct nfs_direct_req *dreq = (struct nfs_direct_req *) data->req;

/* Call the NFS version-specific code */
if (NFS_PROTO(data->inode)->commit_done(task, data) != 0)
return;
if (unlikely(task->tk_status < 0)) {
NFS_PROTO(data->inode)->commit_done(task, data);
}

static void nfs_direct_commit_release(void *calldata)
{
struct nfs_write_data *data = calldata;
struct nfs_direct_req *dreq = (struct nfs_direct_req *) data->req;
int status = data->task.tk_status;

if (status < 0) {
dprintk("NFS: %5u commit failed with error %d.\n",
task->tk_pid, task->tk_status);
data->task.tk_pid, status);
dreq->flags = NFS_ODIRECT_RESCHED_WRITES;
} else if (memcmp(&dreq->verf, &data->verf, sizeof(data->verf))) {
dprintk("NFS: %5u commit verify failed\n", task->tk_pid);
dprintk("NFS: %5u commit verify failed\n", data->task.tk_pid);
dreq->flags = NFS_ODIRECT_RESCHED_WRITES;
}

dprintk("NFS: %5u commit returned %d\n", task->tk_pid, task->tk_status);
dprintk("NFS: %5u commit returned %d\n", data->task.tk_pid, status);
nfs_direct_write_complete(dreq, data->inode);
nfs_commitdata_release(calldata);
}

static const struct rpc_call_ops nfs_commit_direct_ops = {
.rpc_call_done = nfs_direct_commit_result,
.rpc_release = nfs_commit_release,
.rpc_release = nfs_direct_commit_release,
};

static void nfs_direct_commit_schedule(struct nfs_direct_req *dreq)
Expand Down Expand Up @@ -596,7 +603,7 @@ static void nfs_direct_write_complete(struct nfs_direct_req *dreq, struct inode

static void nfs_alloc_commit_data(struct nfs_direct_req *dreq)
{
dreq->commit_data = nfs_commit_alloc();
dreq->commit_data = nfs_commitdata_alloc();
if (dreq->commit_data != NULL)
dreq->commit_data->req = (struct nfs_page *) dreq;
}
Expand All @@ -617,11 +624,20 @@ static void nfs_direct_write_complete(struct nfs_direct_req *dreq, struct inode
static void nfs_direct_write_result(struct rpc_task *task, void *calldata)
{
struct nfs_write_data *data = calldata;
struct nfs_direct_req *dreq = (struct nfs_direct_req *) data->req;
int status = task->tk_status;

if (nfs_writeback_done(task, data) != 0)
return;
}

/*
* NB: Return the value of the first error return code. Subsequent
* errors after the first one are ignored.
*/
static void nfs_direct_write_release(void *calldata)
{
struct nfs_write_data *data = calldata;
struct nfs_direct_req *dreq = (struct nfs_direct_req *) data->req;
int status = data->task.tk_status;

spin_lock(&dreq->lock);

Expand All @@ -643,23 +659,13 @@ static void nfs_direct_write_result(struct rpc_task *task, void *calldata)
break;
case NFS_ODIRECT_DO_COMMIT:
if (memcmp(&dreq->verf, &data->verf, sizeof(dreq->verf))) {
dprintk("NFS: %5u write verify failed\n", task->tk_pid);
dprintk("NFS: %5u write verify failed\n", data->task.tk_pid);
dreq->flags = NFS_ODIRECT_RESCHED_WRITES;
}
}
}
out_unlock:
spin_unlock(&dreq->lock);
}

/*
* NB: Return the value of the first error return code. Subsequent
* errors after the first one are ignored.
*/
static void nfs_direct_write_release(void *calldata)
{
struct nfs_write_data *data = calldata;
struct nfs_direct_req *dreq = (struct nfs_direct_req *) data->req;

if (put_dreq(dreq))
nfs_direct_write_complete(dreq, data->inode);
Expand Down
67 changes: 43 additions & 24 deletions fs/nfs/write.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -48,7 +48,7 @@ static struct kmem_cache *nfs_wdata_cachep;
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);

Expand Down Expand Up @@ -973,21 +973,27 @@ 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));

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);
nfs_context_set_write_error(req->wb_context, 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;
}

Expand All @@ -1012,11 +1018,12 @@ static void nfs_writeback_done_partial(struct rpc_task *task, void *calldata)
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,
};

/*
Expand All @@ -1029,28 +1036,32 @@ static const struct rpc_call_ops nfs_write_partial_ops = {
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)",
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);
nfs_context_set_write_error(req->wb_context, 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;
}

Expand All @@ -1070,11 +1081,12 @@ static void nfs_writeback_done_full(struct rpc_task *task, void *calldata)
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,
};


Expand Down Expand Up @@ -1160,7 +1172,7 @@ int nfs_writeback_done(struct rpc_task *task, struct nfs_write_data *data)


#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
void nfs_commit_release(void *data)
void nfs_commitdata_release(void *data)
{
struct nfs_write_data *wdata = data;

Expand Down Expand Up @@ -1233,7 +1245,7 @@ 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_commitdata_alloc();

if (!data)
goto out_bad;
Expand Down Expand Up @@ -1261,14 +1273,20 @@ nfs_commit_list(struct inode *inode, struct list_head *head, int how)
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);
Expand All @@ -1283,10 +1301,10 @@ static void nfs_commit_done(struct rpc_task *task, void *calldata)
(long long)NFS_FILEID(req->wb_context->path.dentry->d_inode),
req->wb_bytes,
(long long)req_offset(req));
if (task->tk_status < 0) {
nfs_context_set_write_error(req->wb_context, 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;
}

Expand All @@ -1307,6 +1325,7 @@ static void nfs_commit_done(struct rpc_task *task, void *calldata)
next:
nfs_clear_page_tag_locked(req);
}
nfs_commitdata_release(calldata);
}

static const struct rpc_call_ops nfs_commit_ops = {
Expand Down
4 changes: 2 additions & 2 deletions include/linux/nfs_fs.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -466,9 +466,9 @@ extern int nfs_wb_page(struct inode *inode, struct page* page);
extern int nfs_wb_page_cancel(struct inode *inode, struct page* page);
#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
extern int nfs_commit_inode(struct inode *, int);
extern struct nfs_write_data *nfs_commit_alloc(void);
extern struct nfs_write_data *nfs_commitdata_alloc(void);
extern void nfs_commit_free(struct nfs_write_data *wdata);
extern void nfs_commit_release(void *wdata);
extern void nfs_commitdata_release(void *wdata);
#else
static inline int
nfs_commit_inode(struct inode *inode, int how)
Expand Down

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