cifs: call strtobool instead of custom implementation

Meanwhile it cleans up the code, the behaviour is slightly changed. In case of
providing non-boolean value it will fails with corresponding error. In the
original code the attempt of an update was just ignored in such case.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jeff Layton <jlayton@poochiereds.net>
Reviewed-by: Alexander Bokovoy <ab@samba.org>
Signed-off-by: Steve French <steve.french@primarydata.com>

diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index 44ec726..7c50bfa 100644 (file)
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -274,6 +274,7 @@ static ssize_t cifs_stats_proc_write(struct file *file,
                const char __user *buffer, size_t count, loff_t *ppos)
 {
        char c;
+       bool bv;
        int rc;
        struct list_head *tmp1, *tmp2, *tmp3;
        struct TCP_Server_Info *server;
@@ -284,7 +285,7 @@ static ssize_t cifs_stats_proc_write(struct file *file,
        if (rc)
                return rc;
 
-       if (c == '1' || c == 'y' || c == 'Y' || c == '0') {
+       if (strtobool(&c, &bv) == 0) {
 #ifdef CONFIG_CIFS_STATS2
                atomic_set(&totBufAllocCount, 0);
                atomic_set(&totSmBufAllocCount, 0);
@@ -451,15 +452,14 @@ static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
                size_t count, loff_t *ppos)
 {
        char c;
+       bool bv;
        int rc;
 
        rc = get_user(c, buffer);
        if (rc)
                return rc;
-       if (c == '0' || c == 'n' || c == 'N')
-               cifsFYI = 0;
-       else if (c == '1' || c == 'y' || c == 'Y')
-               cifsFYI = 1;
+       if (strtobool(&c, &bv) == 0)
+               cifsFYI = bv;
        else if ((c > '1') && (c <= '9'))
                cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */
 
@@ -490,15 +490,18 @@ static ssize_t cifs_linux_ext_proc_write(struct file *file,
                const char __user *buffer, size_t count, loff_t *ppos)
 {
        char c;
+       bool bv;
        int rc;
 
        rc = get_user(c, buffer);
        if (rc)
                return rc;
-       if (c == '0' || c == 'n' || c == 'N')
-               linuxExtEnabled = 0;
-       else if (c == '1' || c == 'y' || c == 'Y')
-               linuxExtEnabled = 1;
+
+       rc = strtobool(&c, &bv);
+       if (rc)
+               return rc;
+
+       linuxExtEnabled = bv;
 
        return count;
 }
@@ -527,15 +530,18 @@ static ssize_t cifs_lookup_cache_proc_write(struct file *file,
                const char __user *buffer, size_t count, loff_t *ppos)
 {
        char c;
+       bool bv;
        int rc;
 
        rc = get_user(c, buffer);
        if (rc)
                return rc;
-       if (c == '0' || c == 'n' || c == 'N')
-               lookupCacheEnabled = 0;
-       else if (c == '1' || c == 'y' || c == 'Y')
-               lookupCacheEnabled = 1;
+
+       rc = strtobool(&c, &bv);
+       if (rc)
+               return rc;
+
+       lookupCacheEnabled = bv;
 
        return count;
 }
@@ -564,15 +570,18 @@ static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
                size_t count, loff_t *ppos)
 {
        char c;
+       bool bv;
        int rc;
 
        rc = get_user(c, buffer);
        if (rc)
                return rc;
-       if (c == '0' || c == 'n' || c == 'N')
-               traceSMB = 0;
-       else if (c == '1' || c == 'y' || c == 'Y')
-               traceSMB = 1;
+
+       rc = strtobool(&c, &bv);
+       if (rc)
+               return rc;
+
+       traceSMB = bv;
 
        return count;
 }
@@ -630,6 +639,7 @@ static ssize_t cifs_security_flags_proc_write(struct file *file,
        unsigned int flags;
        char flags_string[12];
        char c;
+       bool bv;
 
        if ((count < 1) || (count > 11))
                return -EINVAL;
@@ -642,11 +652,8 @@ static ssize_t cifs_security_flags_proc_write(struct file *file,
        if (count < 3) {
                /* single char or single char followed by null */
                c = flags_string[0];
-               if (c == '0' || c == 'n' || c == 'N') {
-                       global_secflags = CIFSSEC_DEF; /* default */
-                       return count;
-               } else if (c == '1' || c == 'y' || c == 'Y') {
-                       global_secflags = CIFSSEC_MAX;
+               if (strtobool(&c, &bv) == 0) {
+                       global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
                        return count;
                } else if (!isdigit(c)) {
                        cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",