From 0541f9d08acfcf68b589e93cc26c3117d0b594c4 Mon Sep 17 00:00:00 2001 From: David Howells Date: Mon, 8 Apr 2013 15:17:33 +0100 Subject: [PATCH] rtl8192u: Don't use create_proc_read_entry() Don't use create_proc_read_entry() as that is deprecated, but rather use proc_create_data() and seq_file instead. Whilst we're at it, reduce the number of show functions where we can share them. Note: proc_get_stats_ap() should probably use seq_file iteration rather than list_for_each_entry(). Further note: There appears to be a lot of locking missing in this file to defend against concurrent access by the driver doing normal operations. Notably, ieee->network_list traversal and RWCAM/RCAMO command/response access. Further, do any of the registers read have side effects upon reading? Signed-off-by: David Howells cc: Jerry Chuang cc: Mauro Carvalho Chehab cc: Greg Kroah-Hartman cc: linux-wireless@vger.kernel.org cc: devel@driverdev.osuosl.org Signed-off-by: Al Viro --- drivers/staging/rtl8192u/r8192U_core.c | 214 +++++++++++-------------- 1 file changed, 91 insertions(+), 123 deletions(-) diff --git a/drivers/staging/rtl8192u/r8192U_core.c b/drivers/staging/rtl8192u/r8192U_core.c index f7de2f6d49a..433c3df95de 100644 --- a/drivers/staging/rtl8192u/r8192U_core.c +++ b/drivers/staging/rtl8192u/r8192U_core.c @@ -71,6 +71,8 @@ double __extendsfdf2(float a) {return a;} //#include "r8192xU_phyreg.h" #include #include +#include +#include // FIXME: check if 2.6.7 is ok #ifdef CONFIG_RTL8192_PM @@ -472,103 +474,73 @@ void watch_dog_timer_callback(unsigned long data); static struct proc_dir_entry *rtl8192_proc; -static int proc_get_stats_ap(char *page, char **start, off_t offset, int count, - int *eof, void *data) +static int proc_get_stats_ap(struct seq_file *m, void *v) { - struct net_device *dev = data; + struct net_device *dev = m->private; struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev); struct ieee80211_device *ieee = priv->ieee80211; struct ieee80211_network *target; - int len = 0; - list_for_each_entry(target, &ieee->network_list, list) { - - len += snprintf(page + len, count - len, "%s ", target->ssid); - + const char *wpa = "non_WPA"; if (target->wpa_ie_len > 0 || target->rsn_ie_len > 0) - len += snprintf(page + len, count - len, "WPA\n"); - else - len += snprintf(page + len, count - len, "non_WPA\n"); + wpa = "WPA"; + + seq_printf(m, "%s %s\n", target->ssid, wpa); } - *eof = 1; - return len; + return 0; } -static int proc_get_registers(char *page, char **start, - off_t offset, int count, - int *eof, void *data) +static int proc_get_registers(struct seq_file *m, void *v) { - struct net_device *dev = data; -// struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev); - - int len = 0; - int i,n; + struct net_device *dev = m->private; + int i,n, max = 0xff; - int max=0xff; - - /* This dump the current register page */ - len += snprintf(page + len, count - len, - "\n####################page 0##################\n "); + seq_puts(m, "\n####################page 0##################\n "); for (n=0;n<=max;) { //printk( "\nD: %2x> ", n); - len += snprintf(page + len, count - len, - "\nD: %2x > ",n); + seq_printf(m, "\nD: %2x > ",n); for (i=0;i<16 && n<=max;i++,n++) - len += snprintf(page + len, count - len, - "%2x ",read_nic_byte(dev,0x000|n)); + seq_printf(m, "%2x ",read_nic_byte(dev,0x000|n)); // printk("%2x ",read_nic_byte(dev,n)); } - len += snprintf(page + len, count - len, - "\n####################page 1##################\n "); + + seq_puts(m, "\n####################page 1##################\n "); for (n=0;n<=max;) { //printk( "\nD: %2x> ", n); - len += snprintf(page + len, count - len, - "\nD: %2x > ",n); + seq_printf(m, "\nD: %2x > ",n); for (i=0;i<16 && n<=max;i++,n++) - len += snprintf(page + len, count - len, - "%2x ",read_nic_byte(dev,0x100|n)); + seq_printf(m, "%2x ",read_nic_byte(dev,0x100|n)); // printk("%2x ",read_nic_byte(dev,n)); } - len += snprintf(page + len, count - len, - "\n####################page 3##################\n "); + + seq_puts(m, "\n####################page 3##################\n "); for (n=0;n<=max;) { //printk( "\nD: %2x> ", n); - len += snprintf(page + len, count - len, - "\nD: %2x > ",n); + seq_printf(m, "\nD: %2x > ",n); for(i=0;i<16 && n<=max;i++,n++) - len += snprintf(page + len, count - len, - "%2x ",read_nic_byte(dev,0x300|n)); + seq_printf(m, "%2x ",read_nic_byte(dev,0x300|n)); // printk("%2x ",read_nic_byte(dev,n)); } - len += snprintf(page + len, count - len,"\n"); - *eof = 1; - return len; + seq_putc(m, '\n'); + return 0; } - - - - -static int proc_get_stats_tx(char *page, char **start, - off_t offset, int count, - int *eof, void *data) +static int proc_get_stats_tx(struct seq_file *m, void *v) { - struct net_device *dev = data; + struct net_device *dev = m->private; struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev); - int len = 0; - - len += snprintf(page + len, count - len, + seq_printf(m, "TX VI priority ok int: %lu\n" "TX VI priority error int: %lu\n" "TX VO priority ok int: %lu\n" @@ -629,22 +601,15 @@ static int proc_get_stats_tx(char *page, char **start, // priv->stats.txbeaconerr ); - *eof = 1; - return len; + return 0; } - - -static int proc_get_stats_rx(char *page, char **start, - off_t offset, int count, - int *eof, void *data) +static int proc_get_stats_rx(struct seq_file *m, void *v) { - struct net_device *dev = data; + struct net_device *dev = m->private; struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev); - int len = 0; - - len += snprintf(page + len, count - len, + seq_printf(m, "RX packets: %lu\n" "RX urb status error: %lu\n" "RX invalid urb error: %lu\n", @@ -652,9 +617,9 @@ static int proc_get_stats_rx(char *page, char **start, priv->stats.rxstaterr, priv->stats.rxurberr); - *eof = 1; - return len; + return 0; } + void rtl8192_proc_module_init(void) { RT_TRACE(COMP_INIT, "Initializing proc filesystem"); @@ -667,74 +632,77 @@ void rtl8192_proc_module_remove(void) remove_proc_entry(RTL819xU_MODULE_NAME, init_net.proc_net); } - -void rtl8192_proc_remove_one(struct net_device *dev) +/* + * seq_file wrappers for procfile show routines. + */ +static int rtl8192_proc_open(struct inode *inode, struct file *file) { - struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev); - + struct net_device *dev = PDE(inode)->parent->data; + int (*show)(struct seq_file *, void *) = PDE_DATA(inode); - if (priv->dir_dev) { - // remove_proc_entry("stats-hw", priv->dir_dev); - remove_proc_entry("stats-tx", priv->dir_dev); - remove_proc_entry("stats-rx", priv->dir_dev); - // remove_proc_entry("stats-ieee", priv->dir_dev); - remove_proc_entry("stats-ap", priv->dir_dev); - remove_proc_entry("registers", priv->dir_dev); - // remove_proc_entry("cck-registers",priv->dir_dev); - // remove_proc_entry("ofdm-registers",priv->dir_dev); - //remove_proc_entry(dev->name, rtl8192_proc); - remove_proc_entry("wlan0", rtl8192_proc); - priv->dir_dev = NULL; - } + return single_open(file, show, dev); } +static const struct file_operations rtl8192_proc_fops = { + .open = rtl8192_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + +/* + * Table of proc files we need to create. + */ +struct rtl8192_proc_file { + char name[12]; + int (*show)(struct seq_file *, void *); +}; + +static const struct rtl8192_proc_file rtl8192_proc_files[] = { + { "stats-rx", &proc_get_stats_rx }, + { "stats-tx", &proc_get_stats_tx }, + { "stats-ap", &proc_get_stats_ap }, + { "registers", &proc_get_registers }, + { "" } +}; void rtl8192_proc_init_one(struct net_device *dev) { - struct proc_dir_entry *e; + const struct rtl8192_proc_file *f; struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev); - priv->dir_dev = proc_mkdir(dev->name, rtl8192_proc); - if (!priv->dir_dev) { - RT_TRACE(COMP_ERR, "Unable to initialize /proc/net/rtl8192/%s\n", - dev->name); - return; - } - e = create_proc_read_entry("stats-rx", S_IFREG | S_IRUGO, - priv->dir_dev, proc_get_stats_rx, dev); - - if (!e) { - RT_TRACE(COMP_ERR,"Unable to initialize " - "/proc/net/rtl8192/%s/stats-rx\n", - dev->name); - } - - e = create_proc_read_entry("stats-tx", S_IFREG | S_IRUGO, - priv->dir_dev, proc_get_stats_tx, dev); - - if (!e) { - RT_TRACE(COMP_ERR, "Unable to initialize " - "/proc/net/rtl8192/%s/stats-tx\n", - dev->name); + if (rtl8192_proc) { + priv->dir_dev = proc_mkdir(dev->name, rtl8192_proc); + if (!priv->dir_dev) { + RT_TRACE(COMP_ERR, "Unable to initialize /proc/net/rtl8192/%s\n", + dev->name); + return; + } + priv->dir_dev->data = dev; + + for (f = rtl8192_proc_files; f->name[0]; f++) { + if (!proc_create_data(f->name, S_IFREG | S_IRUGO, + priv->dir_dev, + rtl8192_proc_fops, f->show)) { + RT_TRACE(COMP_ERR, "Unable to initialize " + "/proc/net/rtl8192/%s/%s\n", + dev->name, f->name); + return; + } + } } +} - e = create_proc_read_entry("stats-ap", S_IFREG | S_IRUGO, - priv->dir_dev, proc_get_stats_ap, dev); - - if (!e) { - RT_TRACE(COMP_ERR, "Unable to initialize " - "/proc/net/rtl8192/%s/stats-ap\n", - dev->name); - } +void rtl8192_proc_remove_one(struct net_device *dev) +{ + struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev); - e = create_proc_read_entry("registers", S_IFREG | S_IRUGO, - priv->dir_dev, proc_get_registers, dev); - if (!e) { - RT_TRACE(COMP_ERR, "Unable to initialize " - "/proc/net/rtl8192/%s/registers\n", - dev->name); + if (priv->dir_dev) { + remove_proc_subtree(dev->name, rtl8192_proc); + priv->dir_dev = NULL; } } + /**************************************************************************** -----------------------------MISC STUFF------------------------- *****************************************************************************/ -- 2.46.0