Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267966AbTGIALa (ORCPT ); Tue, 8 Jul 2003 20:11:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267970AbTGIALa (ORCPT ); Tue, 8 Jul 2003 20:11:30 -0400 Received: from electric-eye.fr.zoreil.com ([213.41.134.224]:61956 "EHLO fr.zoreil.com") by vger.kernel.org with ESMTP id S267966AbTGIAL0 (ORCPT ); Tue, 8 Jul 2003 20:11:26 -0400 Date: Wed, 9 Jul 2003 02:23:24 +0200 From: Francois Romieu To: chas@locutus.cmf.nrl.navy.mil Cc: linux-kernel@vger.kernel.org, davem@redhat.com Subject: [PATCH 1/8] 2.5.74 - seq_file conversion of /proc/net/atm (devices) Message-ID: <20030709022323.C11897@electric-eye.fr.zoreil.com> References: <20030709021152.B11897@electric-eye.fr.zoreil.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: <20030709021152.B11897@electric-eye.fr.zoreil.com>; from romieu@fr.zoreil.com on Wed, Jul 09, 2003 at 02:11:52AM +0200 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5401 Lines: 185 seq_file conversion for proc/atm/devices: - code inspired from seq_file use in net/core/dev.c; - atm_dev_lock taken/released in atm_devices_seq_{start/stop}; - add a helper CREATE_SEQ_ENTRY() similar to CREATE_ENTRY() (both are removed once conversion is done). net/atm/proc.c | 111 ++++++++++++++++++++++++++++++++++++++++----------------- 1 files changed, 79 insertions(+), 32 deletions(-) diff -puN net/atm/proc.c~atm-proc-seq-devices net/atm/proc.c --- linux-2.5.74-1.1360.1.1-to-1.1384/net/atm/proc.c~atm-proc-seq-devices Tue Jul 8 22:05:57 2003 +++ linux-2.5.74-1.1360.1.1-to-1.1384-fr/net/atm/proc.c Wed Jul 9 01:41:51 2003 @@ -24,6 +24,7 @@ #include #include #include +#include #include #include #include @@ -64,32 +65,30 @@ static struct file_operations proc_spec_ .read = proc_spec_atm_read, }; -static void add_stats(char *buf,const char *aal, +static void add_stats(struct seq_file *seq, const char *aal, const struct k_atm_aal_stats *stats) { - sprintf(strchr(buf,0),"%s ( %d %d %d %d %d )",aal, + seq_printf(seq, "%s ( %d %d %d %d %d )", aal, atomic_read(&stats->tx),atomic_read(&stats->tx_err), atomic_read(&stats->rx),atomic_read(&stats->rx_err), atomic_read(&stats->rx_drop)); } - -static void atm_dev_info(const struct atm_dev *dev,char *buf) +static void atm_dev_info(struct seq_file *seq, const struct atm_dev *dev) { - int off,i; + int i; - off = sprintf(buf,"%3d %-8s",dev->number,dev->type); + seq_printf(seq, "%3d %-8s", dev->number, dev->type); for (i = 0; i < ESI_LEN; i++) - off += sprintf(buf+off,"%02x",dev->esi[i]); - strcat(buf," "); - add_stats(buf,"0",&dev->stats.aal0); - strcat(buf," "); - add_stats(buf,"5",&dev->stats.aal5); - sprintf(strchr(buf,0), "\t[%d]", atomic_read(&dev->refcnt)); - strcat(buf,"\n"); + seq_printf(seq, "%02x", dev->esi[i]); + seq_puts(seq, " "); + add_stats(seq, "0", &dev->stats.aal0); + seq_puts(seq, " "); + add_stats(seq, "5", &dev->stats.aal5); + seq_printf(seq, "\t[%d]", atomic_read(&dev->refcnt)); + seq_putc(seq, '\n'); } - #if defined(CONFIG_ATM_CLIP) || defined(CONFIG_ATM_CLIP_MODULE) @@ -303,30 +302,70 @@ lec_info(struct lec_arp_table *entry, ch #endif -static int atm_devices_info(loff_t pos,char *buf) +static __inline__ void *dev_get_idx(struct seq_file *seq, loff_t left) { - struct atm_dev *dev; struct list_head *p; - int left; - if (!pos) { - return sprintf(buf,"Itf Type ESI/\"MAC\"addr " - "AAL(TX,err,RX,err,drop) ... [refcnt]\n"); - } - left = pos-1; - spin_lock(&atm_dev_lock); list_for_each(p, &atm_devs) { - dev = list_entry(p, struct atm_dev, dev_list); - if (left-- == 0) { - atm_dev_info(dev,buf); - spin_unlock(&atm_dev_lock); - return strlen(buf); - } + if (!--left) + break; } - spin_unlock(&atm_dev_lock); - return 0; + return (p != &atm_devs) ? p : NULL; +} + +static void *atm_devices_seq_start(struct seq_file *seq, loff_t *pos) +{ + spin_lock(&atm_dev_lock); + return *pos ? dev_get_idx(seq, *pos) : (void *) 1; } +static void atm_devices_seq_stop(struct seq_file *seq, void *v) +{ + spin_unlock(&atm_dev_lock); +} + +static void *atm_devices_seq_next(struct seq_file *seq, void *v, loff_t *pos) +{ + ++*pos; + v = (v == (void *)1) ? atm_devs.next : ((struct list_head *)v)->next; + return (v == &atm_devs) ? NULL : v; +} + +static int atm_devices_seq_show(struct seq_file *seq, void *v) +{ + static char atm_devices_banner[] = + "Itf Type ESI/\"MAC\"addr " + "AAL(TX,err,RX,err,drop) ... [refcnt]\n"; + + if (v == (void *)1) + seq_puts(seq, atm_devices_banner); + else { + struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list); + + atm_dev_info(seq, dev); + } + return 0; +} + +static struct seq_operations atm_devices_seq_ops = { + .start = atm_devices_seq_start, + .next = atm_devices_seq_next, + .stop = atm_devices_seq_stop, + .show = atm_devices_seq_show, +}; + +static int atm_devices_seq_open(struct inode *inode, struct file *file) +{ + return seq_open(file, &atm_devices_seq_ops); +} + +static struct file_operations atm_seq_devices_fops = { + .open = atm_devices_seq_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + /* * FIXME: it isn't safe to walk the VCC list without turning off interrupts. * What is really needed is some lock on the devices. Ditto for ATMARP. @@ -623,6 +662,14 @@ void atm_proc_dev_deregister(struct atm_ kfree(dev->proc_name); } +#define CREATE_SEQ_ENTRY(name) \ + do { \ + name = create_proc_entry(#name, S_IRUGO, atm_proc_root); \ + if (!name) \ + goto cleanup; \ + name->proc_fops = &atm_seq_##name##_fops; \ + name->owner = THIS_MODULE; \ + } while (0) #define CREATE_ENTRY(name) \ name = create_proc_entry(#name,0,atm_proc_root); \ @@ -656,7 +703,7 @@ int __init atm_proc_init(void) atm_proc_root = proc_mkdir("net/atm",NULL); if (!atm_proc_root) return -ENOMEM; - CREATE_ENTRY(devices); + CREATE_SEQ_ENTRY(devices); CREATE_ENTRY(pvc); CREATE_ENTRY(svc); CREATE_ENTRY(vc); _ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/