Release 4.14 net/9p/util.c
/*
* net/9p/util.c
*
* This file contains some helper functions
*
* Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net>
* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to:
* Free Software Foundation
* 51 Franklin Street, Fifth Floor
* Boston, MA 02111-1301 USA
*
*/
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/parser.h>
#include <linux/idr.h>
#include <linux/slab.h>
#include <net/9p/9p.h>
/**
* struct p9_idpool - per-connection accounting for tag idpool
* @lock: protects the pool
* @pool: idr to allocate tag id from
*
*/
struct p9_idpool {
spinlock_t lock;
struct idr pool;
};
/**
* p9_idpool_create - create a new per-connection id pool
*
*/
struct p9_idpool *p9_idpool_create(void)
{
struct p9_idpool *p;
p = kmalloc(sizeof(struct p9_idpool), GFP_KERNEL);
if (!p)
return ERR_PTR(-ENOMEM);
spin_lock_init(&p->lock);
idr_init(&p->pool);
return p;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Latchesar Ionkov | 57 | 98.28% | 1 | 50.00% |
| Anthony Liguori | 1 | 1.72% | 1 | 50.00% |
| Total | 58 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL(p9_idpool_create);
/**
* p9_idpool_destroy - create a new per-connection id pool
* @p: idpool to destroy
*/
void p9_idpool_destroy(struct p9_idpool *p)
{
idr_destroy(&p->pool);
kfree(p);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Latchesar Ionkov | 23 | 100.00% | 1 | 100.00% |
| Total | 23 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL(p9_idpool_destroy);
/**
* p9_idpool_get - allocate numeric id from pool
* @p: pool to allocate from
*
* Bugs: This seems to be an awful generic function, should it be in idr.c with
* the lock included in struct idr?
*/
int p9_idpool_get(struct p9_idpool *p)
{
int i;
unsigned long flags;
idr_preload(GFP_NOFS);
spin_lock_irqsave(&p->lock, flags);
/* no need to store exactly p, we just need something non-null */
i = idr_alloc(&p->pool, p, 0, 0, GFP_NOWAIT);
spin_unlock_irqrestore(&p->lock, flags);
idr_preload_end();
if (i < 0)
return -1;
p9_debug(P9_DEBUG_MUX, " id %d pool %p\n", i, p);
return i;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Latchesar Ionkov | 52 | 59.09% | 1 | 14.29% |
| Tejun Heo | 15 | 17.05% | 1 | 14.29% |
| Eric Van Hensbergen | 10 | 11.36% | 1 | 14.29% |
| Anthony Liguori | 8 | 9.09% | 1 | 14.29% |
| Steven Rostedt | 1 | 1.14% | 1 | 14.29% |
| Joe Perches | 1 | 1.14% | 1 | 14.29% |
| Aneesh Kumar K.V | 1 | 1.14% | 1 | 14.29% |
| Total | 88 | 100.00% | 7 | 100.00% |
EXPORT_SYMBOL(p9_idpool_get);
/**
* p9_idpool_put - release numeric id from pool
* @id: numeric id which is being released
* @p: pool to release id into
*
* Bugs: This seems to be an awful generic function, should it be in idr.c with
* the lock included in struct idr?
*/
void p9_idpool_put(int id, struct p9_idpool *p)
{
unsigned long flags;
p9_debug(P9_DEBUG_MUX, " id %d pool %p\n", id, p);
spin_lock_irqsave(&p->lock, flags);
idr_remove(&p->pool, id);
spin_unlock_irqrestore(&p->lock, flags);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Latchesar Ionkov | 38 | 65.52% | 1 | 20.00% |
| Eric Van Hensbergen | 10 | 17.24% | 1 | 20.00% |
| Anthony Liguori | 8 | 13.79% | 1 | 20.00% |
| Joe Perches | 1 | 1.72% | 1 | 20.00% |
| Steven Rostedt | 1 | 1.72% | 1 | 20.00% |
| Total | 58 | 100.00% | 5 | 100.00% |
EXPORT_SYMBOL(p9_idpool_put);
/**
* p9_idpool_check - check if the specified id is available
* @id: id to check
* @p: pool to check
*/
int p9_idpool_check(int id, struct p9_idpool *p)
{
return idr_find(&p->pool, id) != NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Latchesar Ionkov | 26 | 100.00% | 1 | 100.00% |
| Total | 26 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL(p9_idpool_check);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Latchesar Ionkov | 254 | 79.13% | 1 | 10.00% |
| Eric Van Hensbergen | 25 | 7.79% | 2 | 20.00% |
| Anthony Liguori | 18 | 5.61% | 1 | 10.00% |
| Tejun Heo | 18 | 5.61% | 2 | 20.00% |
| Steven Rostedt | 2 | 0.62% | 1 | 10.00% |
| Joe Perches | 2 | 0.62% | 1 | 10.00% |
| Aneesh Kumar K.V | 1 | 0.31% | 1 | 10.00% |
| Lucas De Marchi | 1 | 0.31% | 1 | 10.00% |
| Total | 321 | 100.00% | 10 | 100.00% |
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