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authorDavid Woodhouse <dwmw2@infradead.org>2007-01-18 10:34:51 +1100
committerDavid Woodhouse <dwmw2@infradead.org>2007-01-18 10:34:51 +1100
commit9cdf083f981b8d37b3212400a359368661385099 (patch)
treeaa15a6a08ad87e650dea40fb59b3180bef0d345b /net/sunrpc/cache.c
parente499e01d234a31d59679b7b1e1cf628d917ba49a (diff)
parenta8b3485287731978899ced11f24628c927890e78 (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'net/sunrpc/cache.c')
-rw-r--r--net/sunrpc/cache.c49
1 files changed, 25 insertions, 24 deletions
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index 00cb388ece0..14274490f92 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -34,7 +34,7 @@
#define RPCDBG_FACILITY RPCDBG_CACHE
-static void cache_defer_req(struct cache_req *req, struct cache_head *item);
+static int cache_defer_req(struct cache_req *req, struct cache_head *item);
static void cache_revisit_request(struct cache_head *item);
static void cache_init(struct cache_head *h)
@@ -185,6 +185,7 @@ static int cache_make_upcall(struct cache_detail *detail, struct cache_head *h);
*
* Returns 0 if the cache_head can be used, or cache_puts it and returns
* -EAGAIN if upcall is pending,
+ * -ETIMEDOUT if upcall failed and should be retried,
* -ENOENT if cache entry was negative
*/
int cache_check(struct cache_detail *detail,
@@ -236,7 +237,8 @@ int cache_check(struct cache_detail *detail,
}
if (rv == -EAGAIN)
- cache_defer_req(rqstp, h);
+ if (cache_defer_req(rqstp, h) != 0)
+ rv = -ETIMEDOUT;
if (rv)
cache_put(h, detail);
@@ -284,8 +286,8 @@ static struct file_operations cache_file_operations;
static struct file_operations content_file_operations;
static struct file_operations cache_flush_operations;
-static void do_cache_clean(void *data);
-static DECLARE_WORK(cache_cleaner, do_cache_clean, NULL);
+static void do_cache_clean(struct work_struct *work);
+static DECLARE_DELAYED_WORK(cache_cleaner, do_cache_clean);
void cache_register(struct cache_detail *cd)
{
@@ -337,7 +339,7 @@ void cache_register(struct cache_detail *cd)
spin_unlock(&cache_list_lock);
/* start the cleaning process */
- schedule_work(&cache_cleaner);
+ schedule_delayed_work(&cache_cleaner, 0);
}
int cache_unregister(struct cache_detail *cd)
@@ -461,7 +463,7 @@ static int cache_clean(void)
/*
* We want to regularly clean the cache, so we need to schedule some work ...
*/
-static void do_cache_clean(void *data)
+static void do_cache_clean(struct work_struct *work)
{
int delay = 5;
if (cache_clean() == -1)
@@ -523,14 +525,21 @@ static LIST_HEAD(cache_defer_list);
static struct list_head cache_defer_hash[DFR_HASHSIZE];
static int cache_defer_cnt;
-static void cache_defer_req(struct cache_req *req, struct cache_head *item)
+static int cache_defer_req(struct cache_req *req, struct cache_head *item)
{
struct cache_deferred_req *dreq;
int hash = DFR_HASH(item);
+ if (cache_defer_cnt >= DFR_MAX) {
+ /* too much in the cache, randomly drop this one,
+ * or continue and drop the oldest below
+ */
+ if (net_random()&1)
+ return -ETIMEDOUT;
+ }
dreq = req->defer(req);
if (dreq == NULL)
- return;
+ return -ETIMEDOUT;
dreq->item = item;
dreq->recv_time = get_seconds();
@@ -546,17 +555,8 @@ static void cache_defer_req(struct cache_req *req, struct cache_head *item)
/* it is in, now maybe clean up */
dreq = NULL;
if (++cache_defer_cnt > DFR_MAX) {
- /* too much in the cache, randomly drop
- * first or last
- */
- if (net_random()&1)
- dreq = list_entry(cache_defer_list.next,
- struct cache_deferred_req,
- recent);
- else
- dreq = list_entry(cache_defer_list.prev,
- struct cache_deferred_req,
- recent);
+ dreq = list_entry(cache_defer_list.prev,
+ struct cache_deferred_req, recent);
list_del(&dreq->recent);
list_del(&dreq->hash);
cache_defer_cnt--;
@@ -571,6 +571,7 @@ static void cache_defer_req(struct cache_req *req, struct cache_head *item)
/* must have just been validated... */
cache_revisit_request(item);
}
+ return 0;
}
static void cache_revisit_request(struct cache_head *item)
@@ -670,7 +671,7 @@ cache_read(struct file *filp, char __user *buf, size_t count, loff_t *ppos)
{
struct cache_reader *rp = filp->private_data;
struct cache_request *rq;
- struct cache_detail *cd = PDE(filp->f_dentry->d_inode)->data;
+ struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
int err;
if (count == 0)
@@ -747,7 +748,7 @@ cache_write(struct file *filp, const char __user *buf, size_t count,
loff_t *ppos)
{
int err;
- struct cache_detail *cd = PDE(filp->f_dentry->d_inode)->data;
+ struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
if (count == 0)
return 0;
@@ -778,7 +779,7 @@ cache_poll(struct file *filp, poll_table *wait)
unsigned int mask;
struct cache_reader *rp = filp->private_data;
struct cache_queue *cq;
- struct cache_detail *cd = PDE(filp->f_dentry->d_inode)->data;
+ struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
poll_wait(filp, &queue_wait, wait);
@@ -1254,7 +1255,7 @@ static struct file_operations content_file_operations = {
static ssize_t read_flush(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
- struct cache_detail *cd = PDE(file->f_dentry->d_inode)->data;
+ struct cache_detail *cd = PDE(file->f_path.dentry->d_inode)->data;
char tbuf[20];
unsigned long p = *ppos;
int len;
@@ -1275,7 +1276,7 @@ static ssize_t read_flush(struct file *file, char __user *buf,
static ssize_t write_flush(struct file * file, const char __user * buf,
size_t count, loff_t *ppos)
{
- struct cache_detail *cd = PDE(file->f_dentry->d_inode)->data;
+ struct cache_detail *cd = PDE(file->f_path.dentry->d_inode)->data;
char tbuf[20];
char *ep;
long flushtime;