proc_fops: convert drivers/isdn/ to seq_file
Convert code away from ->read_proc/->write_proc interfaces. Switch to
proc_create()/proc_create_data() which make addition of proc entries
reliable wrt NULL ->proc_fops, NULL ->data and so on.
Problem with ->read_proc et al is described here commit
786d7e1612f0b0adb6046f19b906609e4fe8b1ba "Fix rmmod/read/write races in
/proc entries"
[akpm@linux-foundation.org: CONFIG_PROC_FS=n build fix]
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: Karsten Keil <keil@b1-systems.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/isdn/hardware/eicon/divasproc.c b/drivers/isdn/hardware/eicon/divasproc.c
index 0408272..46d44a9 100644
--- a/drivers/isdn/hardware/eicon/divasproc.c
+++ b/drivers/isdn/hardware/eicon/divasproc.c
@@ -14,6 +14,7 @@
#include <linux/kernel.h>
#include <linux/poll.h>
#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
#include <linux/list.h>
#include <asm/uaccess.h>
@@ -141,14 +142,10 @@
}
}
-/*
-** write group_optimization
-*/
-static int
-write_grp_opt(struct file *file, const char __user *buffer, unsigned long count,
- void *data)
+static ssize_t grp_opt_proc_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *pos)
{
- diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
+ diva_os_xdi_adapter_t *a = PDE(file->f_path.dentry->d_inode)->data;
PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
if ((count == 1) || (count == 2)) {
@@ -172,14 +169,10 @@
return (-EINVAL);
}
-/*
-** write dynamic_l1_down
-*/
-static int
-write_d_l1_down(struct file *file, const char __user *buffer, unsigned long count,
- void *data)
+static ssize_t d_l1_down_proc_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *pos)
{
- diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
+ diva_os_xdi_adapter_t *a = PDE(file->f_path.dentry->d_inode)->data;
PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
if ((count == 1) || (count == 2)) {
@@ -203,63 +196,62 @@
return (-EINVAL);
}
-
-/*
-** read dynamic_l1_down
-*/
-static int
-read_d_l1_down(char *page, char **start, off_t off, int count, int *eof,
- void *data)
+static int d_l1_down_proc_show(struct seq_file *m, void *v)
{
- int len = 0;
- diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
+ diva_os_xdi_adapter_t *a = m->private;
PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
- len += sprintf(page + len, "%s\n",
+ seq_printf(m, "%s\n",
(IoAdapter->capi_cfg.
cfg_1 & DIVA_XDI_CAPI_CFG_1_DYNAMIC_L1_ON) ? "1" :
"0");
-
- if (off + count >= len)
- *eof = 1;
- if (len < off)
- return 0;
- *start = page + off;
- return ((count < len - off) ? count : len - off);
+ return 0;
}
-/*
-** read group_optimization
-*/
-static int
-read_grp_opt(char *page, char **start, off_t off, int count, int *eof,
- void *data)
+static int d_l1_down_proc_open(struct inode *inode, struct file *file)
{
- int len = 0;
- diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
+ return single_open(file, d_l1_down_proc_show, PDE(inode)->data);
+}
+
+static const struct file_operations d_l1_down_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = d_l1_down_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = d_l1_down_proc_write,
+};
+
+static int grp_opt_proc_show(struct seq_file *m, void *v)
+{
+ diva_os_xdi_adapter_t *a = m->private;
PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
- len += sprintf(page + len, "%s\n",
+ seq_printf(m, "%s\n",
(IoAdapter->capi_cfg.
cfg_1 & DIVA_XDI_CAPI_CFG_1_GROUP_POPTIMIZATION_ON)
? "1" : "0");
-
- if (off + count >= len)
- *eof = 1;
- if (len < off)
- return 0;
- *start = page + off;
- return ((count < len - off) ? count : len - off);
+ return 0;
}
-/*
-** info write
-*/
-static int
-info_write(struct file *file, const char __user *buffer, unsigned long count,
- void *data)
+static int grp_opt_proc_open(struct inode *inode, struct file *file)
{
- diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
+ return single_open(file, grp_opt_proc_show, PDE(inode)->data);
+}
+
+static const struct file_operations grp_opt_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = grp_opt_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = grp_opt_proc_write,
+};
+
+static ssize_t info_proc_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *pos)
+{
+ diva_os_xdi_adapter_t *a = PDE(file->f_path.dentry->d_inode)->data;
PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
char c[4];
@@ -277,63 +269,46 @@
return (-EINVAL);
}
-/*
-** info read
-*/
-static int
-info_read(char *page, char **start, off_t off, int count, int *eof,
- void *data)
+static int info_proc_show(struct seq_file *m, void *v)
{
int i = 0;
- int len = 0;
char *p;
char tmpser[16];
- diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
+ diva_os_xdi_adapter_t *a = m->private;
PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
- len +=
- sprintf(page + len, "Name : %s\n",
- IoAdapter->Properties.Name);
- len += sprintf(page + len, "DSP state : %08x\n", a->dsp_mask);
- len += sprintf(page + len, "Channels : %02d\n",
- IoAdapter->Properties.Channels);
- len += sprintf(page + len, "E. max/used : %03d/%03d\n",
+ seq_printf(m, "Name : %s\n", IoAdapter->Properties.Name);
+ seq_printf(m, "DSP state : %08x\n", a->dsp_mask);
+ seq_printf(m, "Channels : %02d\n", IoAdapter->Properties.Channels);
+ seq_printf(m, "E. max/used : %03d/%03d\n",
IoAdapter->e_max, IoAdapter->e_count);
diva_get_vserial_number(IoAdapter, tmpser);
- len += sprintf(page + len, "Serial : %s\n", tmpser);
- len +=
- sprintf(page + len, "IRQ : %d\n",
- IoAdapter->irq_info.irq_nr);
- len += sprintf(page + len, "CardIndex : %d\n", a->CardIndex);
- len += sprintf(page + len, "CardOrdinal : %d\n", a->CardOrdinal);
- len += sprintf(page + len, "Controller : %d\n", a->controller);
- len += sprintf(page + len, "Bus-Type : %s\n",
+ seq_printf(m, "Serial : %s\n", tmpser);
+ seq_printf(m, "IRQ : %d\n", IoAdapter->irq_info.irq_nr);
+ seq_printf(m, "CardIndex : %d\n", a->CardIndex);
+ seq_printf(m, "CardOrdinal : %d\n", a->CardOrdinal);
+ seq_printf(m, "Controller : %d\n", a->controller);
+ seq_printf(m, "Bus-Type : %s\n",
(a->Bus ==
DIVAS_XDI_ADAPTER_BUS_ISA) ? "ISA" : "PCI");
- len += sprintf(page + len, "Port-Name : %s\n", a->port_name);
+ seq_printf(m, "Port-Name : %s\n", a->port_name);
if (a->Bus == DIVAS_XDI_ADAPTER_BUS_PCI) {
- len +=
- sprintf(page + len, "PCI-bus : %d\n",
- a->resources.pci.bus);
- len +=
- sprintf(page + len, "PCI-func : %d\n",
- a->resources.pci.func);
+ seq_printf(m, "PCI-bus : %d\n", a->resources.pci.bus);
+ seq_printf(m, "PCI-func : %d\n", a->resources.pci.func);
for (i = 0; i < 8; i++) {
if (a->resources.pci.bar[i]) {
- len +=
- sprintf(page + len,
+ seq_printf(m,
"Mem / I/O %d : 0x%x / mapped : 0x%lx",
i, a->resources.pci.bar[i],
(unsigned long) a->resources.
pci.addr[i]);
if (a->resources.pci.length[i]) {
- len +=
- sprintf(page + len,
+ seq_printf(m,
" / length : %d",
a->resources.pci.
length[i]);
}
- len += sprintf(page + len, "\n");
+ seq_putc(m, '\n');
}
}
}
@@ -353,16 +328,25 @@
} else {
p = "ready";
}
- len += sprintf(page + len, "State : %s\n", p);
+ seq_printf(m, "State : %s\n", p);
- if (off + count >= len)
- *eof = 1;
- if (len < off)
- return 0;
- *start = page + off;
- return ((count < len - off) ? count : len - off);
+ return 0;
}
+static int info_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, info_proc_show, PDE(inode)->data);
+}
+
+static const struct file_operations info_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = info_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = info_proc_write,
+};
+
/*
** adapter proc init/de-init
*/
@@ -380,28 +364,20 @@
return (0);
a->proc_adapter_dir = (void *) de;
- if (!(pe =
- create_proc_entry(info_proc_name, S_IFREG | S_IRUGO | S_IWUSR, de)))
+ pe = proc_create_data(info_proc_name, S_IRUGO | S_IWUSR, de,
+ &info_proc_fops, a);
+ if (!pe)
return (0);
a->proc_info = (void *) pe;
- pe->write_proc = info_write;
- pe->read_proc = info_read;
- pe->data = a;
- if ((pe = create_proc_entry(grp_opt_proc_name,
- S_IFREG | S_IRUGO | S_IWUSR, de))) {
+ pe = proc_create_data(grp_opt_proc_name, S_IRUGO | S_IWUSR, de,
+ &grp_opt_proc_fops, a);
+ if (pe)
a->proc_grp_opt = (void *) pe;
- pe->write_proc = write_grp_opt;
- pe->read_proc = read_grp_opt;
- pe->data = a;
- }
- if ((pe = create_proc_entry(d_l1_down_proc_name,
- S_IFREG | S_IRUGO | S_IWUSR, de))) {
+ pe = proc_create_data(d_l1_down_proc_name, S_IRUGO | S_IWUSR, de,
+ &d_l1_down_proc_fops, a);
+ if (pe)
a->proc_d_l1_down = (void *) pe;
- pe->write_proc = write_d_l1_down;
- pe->read_proc = read_d_l1_down;
- pe->data = a;
- }
DBG_TRC(("proc entry %s created", tmp));