#include <linux/net.h>
#include <linux/workqueue.h>
#include <linux/mutex.h>
+#include <linux/pagemap.h>
#include <asm/ioctls.h>
#include <linux/sunrpc/types.h>
#include <linux/sunrpc/cache.h>
#include <linux/sunrpc/stats.h>
+#include <linux/sunrpc/rpc_pipe_fs.h>
#define RPCDBG_FACILITY RPCDBG_CACHE
return new;
}
-EXPORT_SYMBOL(sunrpc_cache_lookup);
+EXPORT_SYMBOL_GPL(sunrpc_cache_lookup);
static void queue_loose(struct cache_detail *detail, struct cache_head *ch);
cache_put(old, detail);
return tmp;
}
-EXPORT_SYMBOL(sunrpc_cache_update);
+EXPORT_SYMBOL_GPL(sunrpc_cache_update);
+
+static int cache_make_upcall(struct cache_detail *cd, struct cache_head *h)
+{
+ if (!cd->cache_upcall)
+ return -EINVAL;
+ return cd->cache_upcall(cd, h);
+}
-static int cache_make_upcall(struct cache_detail *detail, struct cache_head *h);
/*
* This is the generic cache management routine for all
* the authentication caches.
if (rv == -EAGAIN)
rv = -ENOENT;
} else if (rv == -EAGAIN || age > refresh_age/2) {
- dprintk("Want update, refage=%ld, age=%ld\n", refresh_age, age);
+ dprintk("RPC: Want update, refage=%ld, age=%ld\n",
+ refresh_age, age);
if (!test_and_set_bit(CACHE_PENDING, &h->flags)) {
switch (cache_make_upcall(detail, h)) {
case -EINVAL:
cache_put(h, detail);
return rv;
}
+EXPORT_SYMBOL_GPL(cache_check);
/*
* caches need to be periodically cleaned.
*
* A table is then only scanned if the current time is at least
* the nextcheck time.
- *
+ *
*/
static LIST_HEAD(cache_list);
static struct cache_detail *current_detail;
static int current_index;
-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(struct work_struct *work);
static DECLARE_DELAYED_WORK(cache_cleaner, do_cache_clean);
-void cache_register(struct cache_detail *cd)
-{
- cd->proc_ent = proc_mkdir(cd->name, proc_net_rpc);
- if (cd->proc_ent) {
- struct proc_dir_entry *p;
- cd->proc_ent->owner = cd->owner;
- cd->channel_ent = cd->content_ent = NULL;
-
- p = create_proc_entry("flush", S_IFREG|S_IRUSR|S_IWUSR,
- cd->proc_ent);
- cd->flush_ent = p;
- if (p) {
- p->proc_fops = &cache_flush_operations;
- p->owner = cd->owner;
- p->data = cd;
- }
-
- if (cd->cache_request || cd->cache_parse) {
- p = create_proc_entry("channel", S_IFREG|S_IRUSR|S_IWUSR,
- cd->proc_ent);
- cd->channel_ent = p;
- if (p) {
- p->proc_fops = &cache_file_operations;
- p->owner = cd->owner;
- p->data = cd;
- }
- }
- if (cd->cache_show) {
- p = create_proc_entry("content", S_IFREG|S_IRUSR|S_IWUSR,
- cd->proc_ent);
- cd->content_ent = p;
- if (p) {
- p->proc_fops = &content_file_operations;
- p->owner = cd->owner;
- p->data = cd;
- }
- }
- }
+static void sunrpc_init_cache_detail(struct cache_detail *cd)
+{
rwlock_init(&cd->hash_lock);
INIT_LIST_HEAD(&cd->queue);
spin_lock(&cache_list_lock);
schedule_delayed_work(&cache_cleaner, 0);
}
-int cache_unregister(struct cache_detail *cd)
+static void sunrpc_destroy_cache_detail(struct cache_detail *cd)
{
cache_purge(cd);
spin_lock(&cache_list_lock);
if (cd->entries || atomic_read(&cd->inuse)) {
write_unlock(&cd->hash_lock);
spin_unlock(&cache_list_lock);
- return -EBUSY;
+ goto out;
}
if (current_detail == cd)
current_detail = NULL;
list_del_init(&cd->others);
write_unlock(&cd->hash_lock);
spin_unlock(&cache_list_lock);
- if (cd->proc_ent) {
- if (cd->flush_ent)
- remove_proc_entry("flush", cd->proc_ent);
- if (cd->channel_ent)
- remove_proc_entry("channel", cd->proc_ent);
- if (cd->content_ent)
- remove_proc_entry("content", cd->proc_ent);
-
- cd->proc_ent = NULL;
- remove_proc_entry(cd->name, proc_net_rpc);
- }
if (list_empty(&cache_list)) {
/* module must be being unloaded so its safe to kill the worker */
- cancel_delayed_work(&cache_cleaner);
- flush_scheduled_work();
+ cancel_delayed_work_sync(&cache_cleaner);
}
- return 0;
+ return;
+out:
+ printk(KERN_ERR "nfsd: failed to unregister %s cache\n", cd->name);
}
/* clean cache tries to find something to clean
current_index++;
/* find a cleanable entry in the bucket and clean it, or set to next bucket */
-
+
if (current_detail && current_index < current_detail->hash_size) {
struct cache_head *ch, **cp;
struct cache_detail *d;
-
+
write_lock(¤t_detail->hash_lock);
/* Ok, now to clean this strand */
-
+
cp = & current_detail->hash_table[current_index];
ch = *cp;
for (; ch; cp= & ch->next, ch= *cp) {
{
int delay = 5;
if (cache_clean() == -1)
- delay = 30*HZ;
+ delay = round_jiffies_relative(30*HZ);
if (list_empty(&cache_list))
delay = 0;
}
-/*
+/*
* Clean all caches promptly. This just calls cache_clean
- * repeatedly until we are sure that every cache has had a chance to
+ * repeatedly until we are sure that every cache has had a chance to
* be fully cleaned
*/
void cache_flush(void)
while (cache_clean() != -1)
cond_resched();
}
+EXPORT_SYMBOL_GPL(cache_flush);
void cache_purge(struct cache_detail *detail)
{
cache_flush();
detail->flush_time = 1;
}
-
+EXPORT_SYMBOL_GPL(cache_purge);
/*
* All deferred requests are stored in a hash table,
* indexed by "struct cache_head *".
* As it may be wasteful to store a whole request
- * structure, we allow the request to provide a
+ * structure, we allow the request to provide a
* deferred form, which must contain a
* 'struct cache_deferred_req'
* This cache_deferred_req contains a method to allow
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 -ETIMEDOUT;
dreq->item = item;
- dreq->recv_time = get_seconds();
spin_lock(&cache_defer_lock);
/* 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--;
INIT_LIST_HEAD(&pending);
spin_lock(&cache_defer_lock);
-
+
lp = cache_defer_hash[hash].next;
if (lp) {
while (lp != &cache_defer_hash[hash]) {
INIT_LIST_HEAD(&pending);
spin_lock(&cache_defer_lock);
-
+
list_for_each_entry_safe(dreq, tmp, &cache_defer_list, recent) {
if (dreq->owner == owner) {
list_del(&dreq->hash);
/*
* communicate with user-space
*
- * We have a magic /proc file - /proc/sunrpc/cache
- * On read, you get a full request, or block
- * On write, an update request is processed
- * Poll works if anything to read, and always allows write
+ * We have a magic /proc file - /proc/sunrpc/<cachename>/channel.
+ * On read, you get a full request, or block.
+ * On write, an update request is processed.
+ * Poll works if anything to read, and always allows write.
*
- * Implemented by linked list of requests. Each open file has
- * a ->private that also exists in this list. New request are added
+ * Implemented by linked list of requests. Each open file has
+ * a ->private that also exists in this list. New requests are added
* to the end and may wakeup and preceding readers.
* New readers are added to the head. If, on read, an item is found with
* CACHE_UPCALLING clear, we free it from the list.
int offset; /* if non-0, we have a refcnt on next request */
};
-static ssize_t
-cache_read(struct file *filp, char __user *buf, size_t count, loff_t *ppos)
+static ssize_t cache_read(struct file *filp, char __user *buf, size_t count,
+ loff_t *ppos, struct cache_detail *cd)
{
struct cache_reader *rp = filp->private_data;
struct cache_request *rq;
- struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
+ struct inode *inode = filp->f_path.dentry->d_inode;
int err;
if (count == 0)
return 0;
- mutex_lock(&queue_io_mutex); /* protect against multiple concurrent
+ mutex_lock(&inode->i_mutex); /* protect against multiple concurrent
* readers on this file */
again:
spin_lock(&queue_lock);
}
if (rp->q.list.next == &cd->queue) {
spin_unlock(&queue_lock);
- mutex_unlock(&queue_io_mutex);
+ mutex_unlock(&inode->i_mutex);
BUG_ON(rp->offset);
return 0;
}
}
if (err == -EAGAIN)
goto again;
- mutex_unlock(&queue_io_mutex);
+ mutex_unlock(&inode->i_mutex);
return err ? err : count;
}
-static char write_buf[8192]; /* protected by queue_io_mutex */
+static ssize_t cache_do_downcall(char *kaddr, const char __user *buf,
+ size_t count, struct cache_detail *cd)
+{
+ ssize_t ret;
+
+ if (copy_from_user(kaddr, buf, count))
+ return -EFAULT;
+ kaddr[count] = '\0';
+ ret = cd->cache_parse(cd, kaddr, count);
+ if (!ret)
+ ret = count;
+ return ret;
+}
-static ssize_t
-cache_write(struct file *filp, const char __user *buf, size_t count,
- loff_t *ppos)
+static ssize_t cache_slow_downcall(const char __user *buf,
+ size_t count, struct cache_detail *cd)
{
- int err;
- struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
+ static char write_buf[8192]; /* protected by queue_io_mutex */
+ ssize_t ret = -EINVAL;
- if (count == 0)
- return 0;
if (count >= sizeof(write_buf))
- return -EINVAL;
-
+ goto out;
mutex_lock(&queue_io_mutex);
+ ret = cache_do_downcall(write_buf, buf, count, cd);
+ mutex_unlock(&queue_io_mutex);
+out:
+ return ret;
+}
- if (copy_from_user(write_buf, buf, count)) {
- mutex_unlock(&queue_io_mutex);
- return -EFAULT;
- }
- write_buf[count] = '\0';
- if (cd->cache_parse)
- err = cd->cache_parse(cd, write_buf, count);
- else
- err = -EINVAL;
+static ssize_t cache_downcall(struct address_space *mapping,
+ const char __user *buf,
+ size_t count, struct cache_detail *cd)
+{
+ struct page *page;
+ char *kaddr;
+ ssize_t ret = -ENOMEM;
+
+ if (count >= PAGE_CACHE_SIZE)
+ goto out_slow;
+
+ page = find_or_create_page(mapping, 0, GFP_KERNEL);
+ if (!page)
+ goto out_slow;
+
+ kaddr = kmap(page);
+ ret = cache_do_downcall(kaddr, buf, count, cd);
+ kunmap(page);
+ unlock_page(page);
+ page_cache_release(page);
+ return ret;
+out_slow:
+ return cache_slow_downcall(buf, count, cd);
+}
- mutex_unlock(&queue_io_mutex);
- return err ? err : count;
+static ssize_t cache_write(struct file *filp, const char __user *buf,
+ size_t count, loff_t *ppos,
+ struct cache_detail *cd)
+{
+ struct address_space *mapping = filp->f_mapping;
+ struct inode *inode = filp->f_path.dentry->d_inode;
+ ssize_t ret = -EINVAL;
+
+ if (!cd->cache_parse)
+ goto out;
+
+ mutex_lock(&inode->i_mutex);
+ ret = cache_downcall(mapping, buf, count, cd);
+ mutex_unlock(&inode->i_mutex);
+out:
+ return ret;
}
static DECLARE_WAIT_QUEUE_HEAD(queue_wait);
-static unsigned int
-cache_poll(struct file *filp, poll_table *wait)
+static unsigned int cache_poll(struct file *filp, poll_table *wait,
+ struct cache_detail *cd)
{
unsigned int mask;
struct cache_reader *rp = filp->private_data;
struct cache_queue *cq;
- struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
poll_wait(filp, &queue_wait, wait);
return mask;
}
-static int
-cache_ioctl(struct inode *ino, struct file *filp,
- unsigned int cmd, unsigned long arg)
+static int cache_ioctl(struct inode *ino, struct file *filp,
+ unsigned int cmd, unsigned long arg,
+ struct cache_detail *cd)
{
int len = 0;
struct cache_reader *rp = filp->private_data;
struct cache_queue *cq;
- struct cache_detail *cd = PDE(ino)->data;
if (cmd != FIONREAD || !rp)
return -EINVAL;
return put_user(len, (int __user *)arg);
}
-static int
-cache_open(struct inode *inode, struct file *filp)
+static int cache_open(struct inode *inode, struct file *filp,
+ struct cache_detail *cd)
{
struct cache_reader *rp = NULL;
+ if (!cd || !try_module_get(cd->owner))
+ return -EACCES;
nonseekable_open(inode, filp);
if (filp->f_mode & FMODE_READ) {
- struct cache_detail *cd = PDE(inode)->data;
-
rp = kmalloc(sizeof(*rp), GFP_KERNEL);
if (!rp)
return -ENOMEM;
return 0;
}
-static int
-cache_release(struct inode *inode, struct file *filp)
+static int cache_release(struct inode *inode, struct file *filp,
+ struct cache_detail *cd)
{
struct cache_reader *rp = filp->private_data;
- struct cache_detail *cd = PDE(inode)->data;
if (rp) {
spin_lock(&queue_lock);
cd->last_close = get_seconds();
atomic_dec(&cd->readers);
}
+ module_put(cd->owner);
return 0;
}
-static struct file_operations cache_file_operations = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .read = cache_read,
- .write = cache_write,
- .poll = cache_poll,
- .ioctl = cache_ioctl, /* for FIONREAD */
- .open = cache_open,
- .release = cache_release,
-};
-
-
static void queue_loose(struct cache_detail *detail, struct cache_head *ch)
{
struct cache_queue *cq;
*bpp = bp;
*lp = len;
}
+EXPORT_SYMBOL_GPL(qword_add);
void qword_addhex(char **bpp, int *lp, char *buf, int blen)
{
*bpp = bp;
*lp = len;
}
+EXPORT_SYMBOL_GPL(qword_addhex);
static void warn_no_listener(struct cache_detail *detail)
{
if (detail->last_warn != detail->last_close) {
detail->last_warn = detail->last_close;
if (detail->warn_no_listener)
- detail->warn_no_listener(detail);
+ detail->warn_no_listener(detail, detail->last_close != 0);
}
}
/*
- * register an upcall request to user-space.
+ * register an upcall request to user-space and queue it up for read() by the
+ * upcall daemon.
+ *
* Each request is at most one page long.
*/
-static int cache_make_upcall(struct cache_detail *detail, struct cache_head *h)
+int sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h,
+ void (*cache_request)(struct cache_detail *,
+ struct cache_head *,
+ char **,
+ int *))
{
char *buf;
char *bp;
int len;
- if (detail->cache_request == NULL)
- return -EINVAL;
-
if (atomic_read(&detail->readers) == 0 &&
detail->last_close < get_seconds() - 30) {
warn_no_listener(detail);
bp = buf; len = PAGE_SIZE;
- detail->cache_request(detail, h, &bp, &len);
+ cache_request(detail, h, &bp, &len);
if (len < 0) {
kfree(buf);
wake_up(&queue_wait);
return 0;
}
+EXPORT_SYMBOL_GPL(sunrpc_cache_pipe_upcall);
/*
* parse a message from user-space and pass it
* Messages are, like requests, separated into fields by
* spaces and dequotes as \xHEXSTRING or embedded \nnn octal
*
- * Message is
+ * Message is
* reply cachename expiry key ... content....
*
- * key and content are both parsed by cache
+ * key and content are both parsed by cache
*/
#define isodigit(c) (isdigit(c) && c <= '7')
*dest = '\0';
return len;
}
+EXPORT_SYMBOL_GPL(qword_get);
/*
};
static void *c_start(struct seq_file *m, loff_t *pos)
+ __acquires(cd->hash_lock)
{
loff_t n = *pos;
unsigned hash, entry;
struct cache_head *ch;
struct cache_detail *cd = ((struct handle*)m->private)->cd;
-
+
read_lock(&cd->hash_lock);
if (!n--)
do {
hash++;
n += 1LL<<32;
- } while(hash < cd->hash_size &&
+ } while(hash < cd->hash_size &&
cd->hash_table[hash]==NULL);
if (hash >= cd->hash_size)
return NULL;
}
static void c_stop(struct seq_file *m, void *p)
+ __releases(cd->hash_lock)
{
struct cache_detail *cd = ((struct handle*)m->private)->cd;
read_unlock(&cd->hash_lock);
return cd->cache_show(m, cd, cp);
}
-static struct seq_operations cache_content_op = {
+static const struct seq_operations cache_content_op = {
.start = c_start,
.next = c_next,
.stop = c_stop,
.show = c_show,
};
-static int content_open(struct inode *inode, struct file *file)
+static int content_open(struct inode *inode, struct file *file,
+ struct cache_detail *cd)
{
- int res;
struct handle *han;
- struct cache_detail *cd = PDE(inode)->data;
- han = kmalloc(sizeof(*han), GFP_KERNEL);
+ if (!cd || !try_module_get(cd->owner))
+ return -EACCES;
+ han = __seq_open_private(file, &cache_content_op, sizeof(*han));
if (han == NULL)
return -ENOMEM;
han->cd = cd;
+ return 0;
+}
- res = seq_open(file, &cache_content_op);
- if (res)
- kfree(han);
- else
- ((struct seq_file *)file->private_data)->private = han;
-
- return res;
+static int content_release(struct inode *inode, struct file *file,
+ struct cache_detail *cd)
+{
+ int ret = seq_release_private(inode, file);
+ module_put(cd->owner);
+ return ret;
}
-static int content_release(struct inode *inode, struct file *file)
+
+static int open_flush(struct inode *inode, struct file *file,
+ struct cache_detail *cd)
{
- struct seq_file *m = (struct seq_file *)file->private_data;
- struct handle *han = m->private;
- kfree(han);
- m->private = NULL;
- return seq_release(inode, file);
+ if (!cd || !try_module_get(cd->owner))
+ return -EACCES;
+ return nonseekable_open(inode, file);
}
-static struct file_operations content_file_operations = {
- .open = content_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = content_release,
-};
+static int release_flush(struct inode *inode, struct file *file,
+ struct cache_detail *cd)
+{
+ module_put(cd->owner);
+ return 0;
+}
static ssize_t read_flush(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
+ size_t count, loff_t *ppos,
+ struct cache_detail *cd)
{
- struct cache_detail *cd = PDE(file->f_path.dentry->d_inode)->data;
char tbuf[20];
unsigned long p = *ppos;
- int len;
+ size_t len;
sprintf(tbuf, "%lu\n", cd->flush_time);
len = strlen(tbuf);
if (p >= len)
return 0;
len -= p;
- if (len > count) len = count;
+ if (len > count)
+ len = count;
if (copy_to_user(buf, (void*)(tbuf+p), len))
- len = -EFAULT;
- else
- *ppos += len;
+ return -EFAULT;
+ *ppos += len;
return len;
}
-static ssize_t write_flush(struct file * file, const char __user * buf,
- size_t count, loff_t *ppos)
+static ssize_t write_flush(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos,
+ struct cache_detail *cd)
{
- struct cache_detail *cd = PDE(file->f_path.dentry->d_inode)->data;
char tbuf[20];
char *ep;
long flushtime;
return count;
}
-static struct file_operations cache_flush_operations = {
- .open = nonseekable_open,
- .read = read_flush,
- .write = write_flush,
+static ssize_t cache_read_procfs(struct file *filp, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
+
+ return cache_read(filp, buf, count, ppos, cd);
+}
+
+static ssize_t cache_write_procfs(struct file *filp, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
+
+ return cache_write(filp, buf, count, ppos, cd);
+}
+
+static unsigned int cache_poll_procfs(struct file *filp, poll_table *wait)
+{
+ struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
+
+ return cache_poll(filp, wait, cd);
+}
+
+static int cache_ioctl_procfs(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
+{
+ struct cache_detail *cd = PDE(inode)->data;
+
+ return cache_ioctl(inode, filp, cmd, arg, cd);
+}
+
+static int cache_open_procfs(struct inode *inode, struct file *filp)
+{
+ struct cache_detail *cd = PDE(inode)->data;
+
+ return cache_open(inode, filp, cd);
+}
+
+static int cache_release_procfs(struct inode *inode, struct file *filp)
+{
+ struct cache_detail *cd = PDE(inode)->data;
+
+ return cache_release(inode, filp, cd);
+}
+
+static const struct file_operations cache_file_operations_procfs = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .read = cache_read_procfs,
+ .write = cache_write_procfs,
+ .poll = cache_poll_procfs,
+ .ioctl = cache_ioctl_procfs, /* for FIONREAD */
+ .open = cache_open_procfs,
+ .release = cache_release_procfs,
};
+
+static int content_open_procfs(struct inode *inode, struct file *filp)
+{
+ struct cache_detail *cd = PDE(inode)->data;
+
+ return content_open(inode, filp, cd);
+}
+
+static int content_release_procfs(struct inode *inode, struct file *filp)
+{
+ struct cache_detail *cd = PDE(inode)->data;
+
+ return content_release(inode, filp, cd);
+}
+
+static const struct file_operations content_file_operations_procfs = {
+ .open = content_open_procfs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = content_release_procfs,
+};
+
+static int open_flush_procfs(struct inode *inode, struct file *filp)
+{
+ struct cache_detail *cd = PDE(inode)->data;
+
+ return open_flush(inode, filp, cd);
+}
+
+static int release_flush_procfs(struct inode *inode, struct file *filp)
+{
+ struct cache_detail *cd = PDE(inode)->data;
+
+ return release_flush(inode, filp, cd);
+}
+
+static ssize_t read_flush_procfs(struct file *filp, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
+
+ return read_flush(filp, buf, count, ppos, cd);
+}
+
+static ssize_t write_flush_procfs(struct file *filp,
+ const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct cache_detail *cd = PDE(filp->f_path.dentry->d_inode)->data;
+
+ return write_flush(filp, buf, count, ppos, cd);
+}
+
+static const struct file_operations cache_flush_operations_procfs = {
+ .open = open_flush_procfs,
+ .read = read_flush_procfs,
+ .write = write_flush_procfs,
+ .release = release_flush_procfs,
+};
+
+static void remove_cache_proc_entries(struct cache_detail *cd)
+{
+ if (cd->u.procfs.proc_ent == NULL)
+ return;
+ if (cd->u.procfs.flush_ent)
+ remove_proc_entry("flush", cd->u.procfs.proc_ent);
+ if (cd->u.procfs.channel_ent)
+ remove_proc_entry("channel", cd->u.procfs.proc_ent);
+ if (cd->u.procfs.content_ent)
+ remove_proc_entry("content", cd->u.procfs.proc_ent);
+ cd->u.procfs.proc_ent = NULL;
+ remove_proc_entry(cd->name, proc_net_rpc);
+}
+
+#ifdef CONFIG_PROC_FS
+static int create_cache_proc_entries(struct cache_detail *cd)
+{
+ struct proc_dir_entry *p;
+
+ cd->u.procfs.proc_ent = proc_mkdir(cd->name, proc_net_rpc);
+ if (cd->u.procfs.proc_ent == NULL)
+ goto out_nomem;
+ cd->u.procfs.channel_ent = NULL;
+ cd->u.procfs.content_ent = NULL;
+
+ p = proc_create_data("flush", S_IFREG|S_IRUSR|S_IWUSR,
+ cd->u.procfs.proc_ent,
+ &cache_flush_operations_procfs, cd);
+ cd->u.procfs.flush_ent = p;
+ if (p == NULL)
+ goto out_nomem;
+
+ if (cd->cache_upcall || cd->cache_parse) {
+ p = proc_create_data("channel", S_IFREG|S_IRUSR|S_IWUSR,
+ cd->u.procfs.proc_ent,
+ &cache_file_operations_procfs, cd);
+ cd->u.procfs.channel_ent = p;
+ if (p == NULL)
+ goto out_nomem;
+ }
+ if (cd->cache_show) {
+ p = proc_create_data("content", S_IFREG|S_IRUSR|S_IWUSR,
+ cd->u.procfs.proc_ent,
+ &content_file_operations_procfs, cd);
+ cd->u.procfs.content_ent = p;
+ if (p == NULL)
+ goto out_nomem;
+ }
+ return 0;
+out_nomem:
+ remove_cache_proc_entries(cd);
+ return -ENOMEM;
+}
+#else /* CONFIG_PROC_FS */
+static int create_cache_proc_entries(struct cache_detail *cd)
+{
+ return 0;
+}
+#endif
+
+int cache_register(struct cache_detail *cd)
+{
+ int ret;
+
+ sunrpc_init_cache_detail(cd);
+ ret = create_cache_proc_entries(cd);
+ if (ret)
+ sunrpc_destroy_cache_detail(cd);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(cache_register);
+
+void cache_unregister(struct cache_detail *cd)
+{
+ remove_cache_proc_entries(cd);
+ sunrpc_destroy_cache_detail(cd);
+}
+EXPORT_SYMBOL_GPL(cache_unregister);
+
+static ssize_t cache_read_pipefs(struct file *filp, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct cache_detail *cd = RPC_I(filp->f_path.dentry->d_inode)->private;
+
+ return cache_read(filp, buf, count, ppos, cd);
+}
+
+static ssize_t cache_write_pipefs(struct file *filp, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct cache_detail *cd = RPC_I(filp->f_path.dentry->d_inode)->private;
+
+ return cache_write(filp, buf, count, ppos, cd);
+}
+
+static unsigned int cache_poll_pipefs(struct file *filp, poll_table *wait)
+{
+ struct cache_detail *cd = RPC_I(filp->f_path.dentry->d_inode)->private;
+
+ return cache_poll(filp, wait, cd);
+}
+
+static int cache_ioctl_pipefs(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
+{
+ struct cache_detail *cd = RPC_I(inode)->private;
+
+ return cache_ioctl(inode, filp, cmd, arg, cd);
+}
+
+static int cache_open_pipefs(struct inode *inode, struct file *filp)
+{
+ struct cache_detail *cd = RPC_I(inode)->private;
+
+ return cache_open(inode, filp, cd);
+}
+
+static int cache_release_pipefs(struct inode *inode, struct file *filp)
+{
+ struct cache_detail *cd = RPC_I(inode)->private;
+
+ return cache_release(inode, filp, cd);
+}
+
+const struct file_operations cache_file_operations_pipefs = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .read = cache_read_pipefs,
+ .write = cache_write_pipefs,
+ .poll = cache_poll_pipefs,
+ .ioctl = cache_ioctl_pipefs, /* for FIONREAD */
+ .open = cache_open_pipefs,
+ .release = cache_release_pipefs,
+};
+
+static int content_open_pipefs(struct inode *inode, struct file *filp)
+{
+ struct cache_detail *cd = RPC_I(inode)->private;
+
+ return content_open(inode, filp, cd);
+}
+
+static int content_release_pipefs(struct inode *inode, struct file *filp)
+{
+ struct cache_detail *cd = RPC_I(inode)->private;
+
+ return content_release(inode, filp, cd);
+}
+
+const struct file_operations content_file_operations_pipefs = {
+ .open = content_open_pipefs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = content_release_pipefs,
+};
+
+static int open_flush_pipefs(struct inode *inode, struct file *filp)
+{
+ struct cache_detail *cd = RPC_I(inode)->private;
+
+ return open_flush(inode, filp, cd);
+}
+
+static int release_flush_pipefs(struct inode *inode, struct file *filp)
+{
+ struct cache_detail *cd = RPC_I(inode)->private;
+
+ return release_flush(inode, filp, cd);
+}
+
+static ssize_t read_flush_pipefs(struct file *filp, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct cache_detail *cd = RPC_I(filp->f_path.dentry->d_inode)->private;
+
+ return read_flush(filp, buf, count, ppos, cd);
+}
+
+static ssize_t write_flush_pipefs(struct file *filp,
+ const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct cache_detail *cd = RPC_I(filp->f_path.dentry->d_inode)->private;
+
+ return write_flush(filp, buf, count, ppos, cd);
+}
+
+const struct file_operations cache_flush_operations_pipefs = {
+ .open = open_flush_pipefs,
+ .read = read_flush_pipefs,
+ .write = write_flush_pipefs,
+ .release = release_flush_pipefs,
+};
+
+int sunrpc_cache_register_pipefs(struct dentry *parent,
+ const char *name, mode_t umode,
+ struct cache_detail *cd)
+{
+ struct qstr q;
+ struct dentry *dir;
+ int ret = 0;
+
+ sunrpc_init_cache_detail(cd);
+ q.name = name;
+ q.len = strlen(name);
+ q.hash = full_name_hash(q.name, q.len);
+ dir = rpc_create_cache_dir(parent, &q, umode, cd);
+ if (!IS_ERR(dir))
+ cd->u.pipefs.dir = dir;
+ else {
+ sunrpc_destroy_cache_detail(cd);
+ ret = PTR_ERR(dir);
+ }
+ return ret;
+}
+EXPORT_SYMBOL_GPL(sunrpc_cache_register_pipefs);
+
+void sunrpc_cache_unregister_pipefs(struct cache_detail *cd)
+{
+ rpc_remove_cache_dir(cd->u.pipefs.dir);
+ cd->u.pipefs.dir = NULL;
+ sunrpc_destroy_cache_detail(cd);
+}
+EXPORT_SYMBOL_GPL(sunrpc_cache_unregister_pipefs);
+
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff