cregit-Linux how code gets into the kernel

Release 4.11 net/9p/util.c

Directory: net/9p
/*
 *  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

PersonTokensPropCommitsCommitProp
Latchesar Ionkov5798.28%150.00%
Anthony Liguori11.72%150.00%
Total58100.00%2100.00%

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

PersonTokensPropCommitsCommitProp
Latchesar Ionkov23100.00%1100.00%
Total23100.00%1100.00%

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

PersonTokensPropCommitsCommitProp
Latchesar Ionkov5259.09%114.29%
Tejun Heo1517.05%114.29%
Eric Van Hensbergen1011.36%114.29%
Anthony Liguori89.09%114.29%
Aneesh Kumar K.V11.14%114.29%
Steven Rostedt11.14%114.29%
Joe Perches11.14%114.29%
Total88100.00%7100.00%

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

PersonTokensPropCommitsCommitProp
Latchesar Ionkov3865.52%120.00%
Eric Van Hensbergen1017.24%120.00%
Anthony Liguori813.79%120.00%
Joe Perches11.72%120.00%
Steven Rostedt11.72%120.00%
Total58100.00%5100.00%

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

PersonTokensPropCommitsCommitProp
Latchesar Ionkov26100.00%1100.00%
Total26100.00%1100.00%

EXPORT_SYMBOL(p9_idpool_check);

Overall Contributors

PersonTokensPropCommitsCommitProp
Latchesar Ionkov25479.13%110.00%
Eric Van Hensbergen257.79%220.00%
Anthony Liguori185.61%110.00%
Tejun Heo185.61%220.00%
Joe Perches20.62%110.00%
Steven Rostedt20.62%110.00%
Lucas De Marchi10.31%110.00%
Aneesh Kumar K.V10.31%110.00%
Total321100.00%10100.00%
Directory: net/9p
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.