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Subject[PATCH 3/8] 2.6.0-test2-bk8 - seq_file conversion of /proc/net/atm (pvc)
seq_file support for /proc/net/atm/pvc:
- pvc_info(): seq_printf/seq_putc replaces sprintf;
- atm_pvc_info() removal;
- the vc helpers (atm_vc_common_seq_xxx) do the remaining work.


net/atm/proc.c | 81 +++++++++++++++++++++++----------------------------------
1 files changed, 34 insertions(+), 47 deletions(-)

diff -puN net/atm/proc.c~atm-proc-seq-pvc-conversion net/atm/proc.c
--- linux-2.6.0-test2-bk8/net/atm/proc.c~atm-proc-seq-pvc-conversion Fri Aug 8 20:29:25 2003
+++ linux-2.6.0-test2-bk8-fr/net/atm/proc.c Fri Aug 8 20:29:25 2003
@@ -262,7 +262,7 @@ static void *atm_vc_common_seq_next(stru
return v;
}

-static void pvc_info(struct atm_vcc *vcc, char *buf, int clip_info)
+static void pvc_info(struct seq_file *seq, struct atm_vcc *vcc, int clip_info)
{
static const char *class_name[] = { "off","UBR","CBR","VBR","ABR" };
static const char *aal_name[] = {
@@ -270,9 +270,8 @@ static void pvc_info(struct atm_vcc *vcc
"???", "5", "???", "???", /* 4- 7 */
"???", "???", "???", "???", /* 8-11 */
"???", "0", "???", "???"}; /* 12-15 */
- int off;

- off = sprintf(buf,"%3d %3d %5d %-3s %7d %-5s %7d %-6s",
+ seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
vcc->dev->number,vcc->vpi,vcc->vci,
vcc->qos.aal >= sizeof(aal_name)/sizeof(aal_name[0]) ? "err" :
aal_name[vcc->qos.aal],vcc->qos.rxtp.min_pcr,
@@ -284,18 +283,14 @@ static void pvc_info(struct atm_vcc *vcc
struct net_device *dev;

dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
- off += sprintf(buf+off,"CLIP, Itf:%s, Encap:",
+ seq_printf(seq, "CLIP, Itf:%s, Encap:",
dev ? dev->name : "none?");
- if (clip_vcc->encap)
- off += sprintf(buf+off,"LLC/SNAP");
- else
- off += sprintf(buf+off,"None");
+ seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
}
#endif
- strcpy(buf+off,"\n");
+ seq_putc(seq, '\n');
}

-
static const char *vcc_state(struct atm_vcc *vcc)
{
static const char *map[] = { ATM_VS2TXT_MAP };
@@ -466,48 +461,40 @@ static struct file_operations atm_seq_de
.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.
- */
-
-static int atm_pvc_info(loff_t pos,char *buf)
+static int atm_pvc_seq_show(struct seq_file *seq, void *v)
{
- struct hlist_node *node;
- struct sock *s;
- struct atm_vcc *vcc;
- int left, clip_info = 0;
+ static char atm_pvc_banner[] =
+ "Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n";

- if (!pos) {
- return sprintf(buf,"Itf VPI VCI AAL RX(PCR,Class) "
- "TX(PCR,Class)\n");
- }
- left = pos-1;
-#if defined(CONFIG_ATM_CLIP) || defined(CONFIG_ATM_CLIP_MODULE)
- if (try_atm_clip_ops())
- clip_info = 1;
-#endif
- read_lock(&vcc_sklist_lock);
- sk_for_each(s, node, &vcc_sklist) {
- vcc = atm_sk(s);
- if (vcc->sk->sk_family == PF_ATMPVC && vcc->dev && !left--) {
- pvc_info(vcc,buf,clip_info);
- read_unlock(&vcc_sklist_lock);
-#if defined(CONFIG_ATM_CLIP) || defined(CONFIG_ATM_CLIP_MODULE)
- if (clip_info)
- module_put(atm_clip_ops->owner);
-#endif
- return strlen(buf);
- }
+ if (v == (void *)1)
+ seq_puts(seq, atm_pvc_banner);
+ else {
+ struct atm_vc_state *state = seq->private;
+ struct atm_vcc *vcc = atm_sk(state->sk);
+
+ pvc_info(seq, vcc, state->clip_info);
}
- read_unlock(&vcc_sklist_lock);
-#if defined(CONFIG_ATM_CLIP) || defined(CONFIG_ATM_CLIP_MODULE)
- if (clip_info)
- module_put(atm_clip_ops->owner);
-#endif
return 0;
}

+static struct seq_operations atm_pvc_seq_ops = {
+ .start = atm_vc_common_seq_start,
+ .next = atm_vc_common_seq_next,
+ .stop = atm_vc_common_seq_stop,
+ .show = atm_pvc_seq_show,
+};
+
+static int atm_pvc_seq_open(struct inode *inode, struct file *file)
+{
+ return atm_vc_common_seq_open(inode, file, PF_ATMPVC, &atm_pvc_seq_ops);
+}
+
+static struct file_operations atm_seq_pvc_fops = {
+ .open = atm_pvc_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = atm_vc_common_seq_release,
+};

static int atm_vc_info(loff_t pos,char *buf)
{
@@ -804,7 +791,7 @@ int __init atm_proc_init(void)
if (!atm_proc_root)
return -ENOMEM;
CREATE_SEQ_ENTRY(devices);
- CREATE_ENTRY(pvc);
+ CREATE_SEQ_ENTRY(pvc);
CREATE_ENTRY(svc);
CREATE_ENTRY(vc);
#if defined(CONFIG_ATM_CLIP) || defined(CONFIG_ATM_CLIP_MODULE)
_
-
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