mgmt/glusterd : volume set validation fixes

This is the new version of the patch by Kaushik at review.gluster.com/699

The following new option types have been introduced:
 * GF_OPTION_TYPE_INTERNET_ADDRESS_LIST
 * GF_OPTION_TYPE_PRIORITY_LIST
 * GF_OPTION_TYPE_SIZE_LIST
and option types of several options in translators have been updated to use the
new types.

valid_internet_address(), valid_ipv4_address() & valid_ipv6_address() functions
has been updated for * wildcard matching. Previously used standalone wildcard
address checking functions have been removed.

Changes have been done to stripe translator to correctly set, update and use
stripe-blocksize. Also minimum value for block-size has been set to 16KB.

Change-Id: I2aa484ff695f6a915a8fc9a9f965cf0344f41d59
BUG: 765248
Signed-off-by: Kaushal M <kaushal@redhat.com>
Reviewed-on: http://review.gluster.com/2899
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Shishir Gowda <shishirng@gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>

4 files changed, 269 insertions, 142 deletions

diff --git a/libglusterfs/src/common-utils.c b/libglusterfs/src/common-utils.c
index 952af10c..f26d2bdc 100644
--- a/libglusterfs/src/common-utils.c
+++ b/libglusterfs/src/common-utils.c
@@ -1586,47 +1586,79 @@ get_nth_word (const char *str, int n)
 }
 
 /* RFC 1123 & 952 */
-
-/* The functions below validate given internet addresses and
- * wildcard internet address for correctness.
- * All return 1 on success and 0 on failure
- */
-
+/* Syntax formed combining RFC 1123 & 952                                     *
+   <hname> ::= <first-name>*["."<gen-name>]                                   *
+   <first-name> ::= <let-or-digit> <[*[<let-or-digit-or-hyphen>]<let-or-digit>]
+   <gen-name> ::= <let>[*[<let-or-digit-or-hyphen>]<let-or-digit>]            */
 char
 valid_host_name (char *address, int length)
 {
-        int     i = 0;
-        char    ret = 0;
-        int     flag = 0;
+        int             i = 0;
+        int             str_len = 0;
+        char            ret = 1;
+        char            *dup_addr = NULL;
+        char            *temp_str = NULL;
+        char            *save_ptr = NULL;
 
-        if ((length > 255) || (length == 1))
+        if ((length > _POSIX_HOST_NAME_MAX) || (length == 1)) {
+                ret = 0;
                 goto out;
+        }
 
-        if (!isalnum (address[length - 1]))
+        dup_addr = gf_strdup (address);
+        if (!dup_addr) {
+                ret = 0;
                 goto out;
+        }
+        temp_str = strtok_r (dup_addr,".", &save_ptr);
 
-        for (i = 0; i < length; i++) {
-                if (!isalnum (address[i]) && (address[i] != '.')
-                    && (address[i] != '-'))
+        /* first-name */
+        if (!temp_str ||
+            !isalnum(temp_str[0]) ||
+            !isalnum (temp_str[strlen(temp_str)-1])) {
+                ret = 0;
+                goto out;
+        }
+        for (i = 1; i < (strlen (temp_str) - 1); i++) {
+                if (!isalnum (temp_str[i]) && (temp_str[i] != '-')) {
+                        ret = 0;
                         goto out;
+                }
+        }
 
-                if (isalpha(address[i]))
-                        flag = 1;
+        /* gen-name */
+        while ((temp_str = strtok_r (NULL, ".", &save_ptr))) {
+                str_len = strlen (temp_str);
+
+                if (!isalpha (temp_str[0]) ||
+                    !isalnum (temp_str[str_len-1])) {
+                        ret = 0;
+                        goto out;
+                }
+                for (i = 1; i < str_len; i++) {
+                        if (!isalnum (temp_str[i]) && (temp_str[i] != '-')) {
+                                ret = 0;
+                                goto out;
+                        }
+                }
         }
 
-        if (flag)
-                ret = 1;
 out:
+        if (dup_addr)
+                GF_FREE (dup_addr);
         return ret;
 }
 
+/*  Matches all ipv4 address, if wildcard_acc is true  '*' wildcard pattern for*
+  subnets is considerd as valid strings as well                               */
 char
-valid_ipv4_address (char *address, int length)
+valid_ipv4_address (char *address, int length, gf_boolean_t wildcard_acc)
 {
         int octets = 0;
         int value = 0;
         char *tmp = NULL, *ptr = NULL, *prev = NULL, *endptr = NULL;
-        char ret = 0;
+        char ret = 1;
+        int is_wildcard = 0;
 
         tmp = gf_strdup (address);
         prev = tmp;
@@ -1634,15 +1666,22 @@ valid_ipv4_address (char *address, int length)
 
         while (prev != NULL) {
                 octets++;
-                value = strtol (prev, &endptr, 10);
-                if ((value > 255) || (value < 0) ||
-                    (endptr != NULL && *endptr != '\0'))
-                        goto out;
+                if (wildcard_acc && !strcmp (prev, "*")) {
+                        is_wildcard = 1;
+                } else {
+                        value = strtol (prev, &endptr, 10);
+                        if ((value > 255) || (value < 0) ||
+                            (endptr != NULL && *endptr != '\0')) {
+                                ret = 0;
+                                goto out;
+                        }
+                }
                 prev = strtok_r (NULL, ".", &ptr);
         }
 
-        if (octets == 4)
-                ret = 1;
+        if ((octets > 4) || (octets < 4 && !is_wildcard)) {
+                ret = 0;
+        }
 
 out:
         GF_FREE (tmp);
@@ -1650,27 +1689,35 @@ out:
 }
 
 char
-valid_ipv6_address (char *address, int length)
+valid_ipv6_address (char *address, int length, gf_boolean_t wildcard_acc)
 {
         int hex_numbers = 0;
         int value = 0;
         char *tmp = NULL, *ptr = NULL, *prev = NULL, *endptr = NULL;
-        char ret = 0;
+        char ret = 1;
+        int is_wildcard = 0;
 
         tmp = gf_strdup (address);
         prev = strtok_r (tmp, ":", &ptr);
 
         while (prev != NULL) {
                 hex_numbers++;
-                value = strtol (prev, &endptr, 16);
-                if ((value > 0xffff) || (value < 0)
-                    || (endptr != NULL && *endptr != '\0'))
-                        goto out;
+                if (wildcard_acc && !strcmp (prev, "*")) {
+                        is_wildcard = 1;
+                } else {
+                        value = strtol (prev, &endptr, 16);
+                        if ((value > 0xffff) || (value < 0)
+                        || (endptr != NULL && *endptr != '\0')) {
+                                ret = 0;
+                                goto out;
+                        }
+                }
                 prev = strtok_r (NULL, ":", &ptr);
         }
 
-        if (hex_numbers <= 8)
-                ret = 1;
+        if ((hex_numbers > 8) || (hex_numbers < 8 && !is_wildcard)) {
+                ret = 0;
+        }
 
 out:
         GF_FREE (tmp);
@@ -1678,7 +1725,7 @@ out:
 }
 
 char
-valid_internet_address (char *address)
+valid_internet_address (char *address, gf_boolean_t wildcard_acc)
 {
         char ret = 0;
         int length = 0;
@@ -1692,8 +1739,8 @@ valid_internet_address (char *address)
         if (length == 0)
                 goto out;
 
-        if (valid_ipv4_address (address, length)
-            || valid_ipv6_address (address, length)
+        if (valid_ipv4_address (address, length, wildcard_acc)
+            || valid_ipv6_address (address, length, wildcard_acc)
             || valid_host_name (address, length))
                 ret = 1;
 
@@ -1701,104 +1748,6 @@ out:
         return ret;
 }
 
-char
-valid_ipv4_wildcard_check (char *address)
-{
-        char    ret = 0;
-        int     octets = 0;
-        char    *tmp = NULL;
-        char    *prev = NULL;
-        char    *endptr = NULL;
-        int     value = 0;
-        int     is_wildcard = 0;
-
-        tmp = gf_strdup (address);
-        prev = strtok (tmp, ".");
-
-        while (prev != NULL) {
-                octets++;
-
-                if (!strcmp (prev, "*")) {
-                        is_wildcard = 1;
-                } else {
-                        value = strtol (prev, &endptr, 10);
-
-                        if ((value > 255) || (value < 0) ||
-                            (endptr != NULL && *endptr != '\0'))
-                                goto out;
-                }
-                prev = strtok (NULL, ".");
-        }
-
-        if (is_wildcard && (octets <= 4))
-                ret = 1;
-
-out:
-        if (tmp)
-                GF_FREE (tmp);
-        return ret;
-
-}
-
-char
-valid_ipv6_wildcard_check (char *address)
-{
-        char    ret = 0;
-        int     hex_numbers = 0;
-        int     value = 0;
-        char    *tmp = NULL;
-        char    *prev = NULL;
-        char    *endptr = NULL;
-        int     is_wildcard = 0;
-
-        tmp = gf_strdup (address);
-        prev = strtok (tmp, ":");
-
-        while (prev != NULL) {
-                hex_numbers++;
-
-                if (!strcmp (prev, "*")) {
-                        is_wildcard = 1;
-                } else {
-                        value = strtol (prev, &endptr, 16);
-
-                        if ((value > 0xffff) || (value < 0) ||
-                            (endptr != NULL && *endptr != '\0'))
-                                goto out;
-                }
-                prev = strtok (NULL, ":");
-        }
-
-        if (is_wildcard && (hex_numbers <= 8))
-                ret = 1;
-out:
-        if (tmp)
-                GF_FREE (tmp);
-        return ret;
-}
-
-char
-valid_wildcard_internet_address (char *address)
-{
-        char    ret = 0;
-
-        if (address == NULL) {
-                gf_log_callingfn (THIS->name, GF_LOG_WARNING,
-                                  "argument invalid");
-                goto out;
-        }
-
-        if (strlen (address) == 0)
-                goto out;
-
-        if (valid_ipv4_wildcard_check (address) ||
-            valid_ipv6_wildcard_check (address))
-                ret = 1;
-
-out:
-        return ret;
-}
-
 /*Thread safe conversion function*/
 char *
 uuid_utoa (uuid_t uuid)
diff --git a/libglusterfs/src/common-utils.h b/libglusterfs/src/common-utils.h
index 8c9b26f7..33551779 100644
--- a/libglusterfs/src/common-utils.h
+++ b/libglusterfs/src/common-utils.h
@@ -465,9 +465,9 @@ void skip_word (char **str);
 char *get_nth_word (const char *str, int n);
 
 char valid_host_name (char *address, int length);
-char valid_ipv4_address (char *address, int length);
-char valid_ipv6_address (char *address, int length);
-char valid_internet_address (char *address);
+char valid_ipv4_address (char *address, int length, gf_boolean_t wildcard_acc);
+char valid_ipv6_address (char *address, int length, gf_boolean_t wildcard_acc);
+char valid_internet_address (char *address, gf_boolean_t wildcard_acc);
 char valid_ipv4_wildcard_check (char *address);
 char valid_ipv6_wildcard_check (char *address);
 char valid_wildcard_internet_address (char *address);
diff --git a/libglusterfs/src/options.c b/libglusterfs/src/options.c
index 39844461..6da68fd9 100644
--- a/libglusterfs/src/options.c
+++ b/libglusterfs/src/options.c
@@ -464,10 +464,11 @@ xlator_option_validate_addr (xlator_t *xl, const char *key, const char *value,
         int          ret = -1;
         char         errstr[256];
 
-        if (!valid_internet_address ((char *)value)) {
+        if (!valid_internet_address ((char *)value, _gf_false)) {
                 snprintf (errstr, 256,
-                          "internet address '%s' does not conform to standards.",
-                          value);
+                          "option %s %s: '%s'  is not a valid internet-address,"
+                          " it does not conform to standards.",
+                          key, value, value);
                 gf_log (xl->name, GF_LOG_ERROR, "%s", errstr);
                 if (op_errstr)
                         *op_errstr = gf_strdup (errstr);
@@ -478,6 +479,176 @@ xlator_option_validate_addr (xlator_t *xl, const char *key, const char *value,
         return ret;
 }
 
+static int
+xlator_option_validate_addr_list (xlator_t *xl, const char *key,
+                                  const char *value, volume_option_t *opt,
+                                  char **op_errstr)
+{
+        int          ret = -1;
+        char         *dup_val = NULL;
+        char         *addr_tok = NULL;
+        char         *save_ptr = NULL;
+        char         errstr[256];
+
+        dup_val = gf_strdup (value);
+        if (!dup_val) {
+                ret = -1;
+                snprintf (errstr, 256, "internal error, out of memory.");
+                goto out;
+        }
+
+        addr_tok = strtok_r (dup_val, ",", &save_ptr);
+        while (addr_tok) {
+                if (!valid_internet_address (addr_tok, _gf_true)) {
+                        snprintf (errstr, 256,
+                                  "option %s %s: '%s' is not a valid "
+                                  "internet-address-list",
+                                  key, value, value);
+                        gf_log (xl->name, GF_LOG_ERROR, "%s", errstr);
+                        ret = -1;
+                        goto out;
+                }
+                addr_tok = strtok_r (NULL, ",", &save_ptr);
+        }
+        ret = 0;
+ out:
+        if (op_errstr && ret)
+                *op_errstr = gf_strdup (errstr);
+        if (dup_val)
+                GF_FREE (dup_val);
+
+        return ret;
+}
+
+/*XXX: the rules to validate are as per block-size required for stripe xlator */
+static int
+gf_validate_size (const char *sizestr, volume_option_t *opt)
+{
+        uint64_t                value = 0;
+        int                     ret = 0;
+
+        GF_ASSERT (opt);
+
+        if (gf_string2bytesize (sizestr, &value) != 0 ||
+            value < opt->min ||
+            value % 512) {
+                ret = -1;
+                goto out;
+        }
+
+ out:
+        gf_log (THIS->name, GF_LOG_DEBUG, "Returning %d", ret);
+        return ret;
+}
+
+static int
+gf_validate_number (const char *numstr, volume_option_t *opt)
+{
+        int32_t value;
+        return gf_string2int32 (numstr, &value);
+}
+
+/*  Parses the string to be of the form <key1>:<value1>,<key2>:<value2>...  *
+ *  takes two optional validaters key_validator and value_validator         */
+static int
+validate_list_elements (const char *string, volume_option_t *opt,
+                        int (key_validator)( const char *),
+                        int (value_validator)( const char *, volume_option_t *))
+{
+
+        char                    *dup_string = NULL;
+        char                    *str_sav = NULL;
+        char                    *substr_sav = NULL;
+        char                    *str_ptr = NULL;
+        char                    *key = NULL;
+        char                    *value = NULL;
+        int                     ret = 0;
+
+        GF_ASSERT (string);
+
+        dup_string = gf_strdup (string);
+        if (NULL == dup_string)
+                goto out;
+
+        str_ptr = strtok_r (dup_string, ",", &str_sav);
+        while (str_ptr) {
+
+                key = strtok_r (str_ptr, ":", &substr_sav);
+                if (!key ||
+                    (key_validator && key_validator(key))) {
+                        ret = -1;
+                        gf_log (THIS->name, GF_LOG_WARNING,
+                                "invalid list '%s', key '%s' not valid.",
+                                string, key);
+                        goto out;
+                }
+
+                value = strtok_r (NULL, ":", &substr_sav);
+                if (!value ||
+                    (value_validator && value_validator(value, opt))) {
+                        ret = -1;
+                        gf_log (THIS->name, GF_LOG_WARNING,
+                                "invalid list '%s', value '%s' not valid.",
+                                string, key);
+                        goto out;
+                }
+
+                str_ptr = strtok_r (NULL, ",", &str_sav);
+                substr_sav = NULL;
+        }
+ out:
+        if (dup_string)
+                GF_FREE (dup_string);
+        gf_log (THIS->name, GF_LOG_DEBUG, "Returning %d", ret);
+        return ret;
+}
+
+static int
+xlator_option_validate_priority_list (xlator_t *xl, const char *key,
+                                      const char *value, volume_option_t *opt,
+                                      char **op_errstr)
+{
+        int                     ret =0;
+        char                    errstr[1024] = {0, };
+
+        GF_ASSERT (value);
+
+        ret = validate_list_elements (value, opt, NULL, &gf_validate_number);
+        if (ret) {
+                snprintf (errstr, 1024,
+                          "option %s %s: '%s' is not a valid "
+                          "priority-list", key, value, value);
+                *op_errstr = gf_strdup (errstr);
+        }
+
+        return ret;
+}
+
+static int
+xlator_option_validate_size_list (xlator_t *xl, const char *key,
+                                  const char *value, volume_option_t *opt,
+                                  char **op_errstr)
+{
+
+        int                    ret = 0;
+        char                   errstr[1024] = {0, };
+
+        GF_ASSERT (value);
+
+        ret = gf_validate_size (value, opt);
+        if (ret)
+                ret = validate_list_elements (value, opt, NULL, &gf_validate_size);
+
+        if (ret) {
+                snprintf (errstr, 1024,
+                          "option %s %s: '%s' is not a valid "
+                          "size-list", key, value, value);
+                *op_errstr = gf_strdup (errstr);
+        }
+
+        return ret;
+
+}
 
 static int
 xlator_option_validate_any (xlator_t *xl, const char *key, const char *value,
@@ -486,7 +657,6 @@ xlator_option_validate_any (xlator_t *xl, const char *key, const char *value,
         return 0;
 }
 
-
 typedef int (xlator_option_validator_t) (xlator_t *xl, const char *key,
                                          const char *value,
                                          volume_option_t *opt, char **operrstr);
@@ -510,6 +680,11 @@ xlator_option_validate (xlator_t *xl, char *key, char *value,
                 [GF_OPTION_TYPE_TIME]        = xlator_option_validate_time,
                 [GF_OPTION_TYPE_DOUBLE]      = xlator_option_validate_double,
                 [GF_OPTION_TYPE_INTERNET_ADDRESS] = xlator_option_validate_addr,
+                [GF_OPTION_TYPE_INTERNET_ADDRESS_LIST] =
+                xlator_option_validate_addr_list,
+                [GF_OPTION_TYPE_PRIORITY_LIST] =
+                xlator_option_validate_priority_list,
+                [GF_OPTION_TYPE_SIZE_LIST]   = xlator_option_validate_size_list,
                 [GF_OPTION_TYPE_ANY]         = xlator_option_validate_any,
                 [GF_OPTION_TYPE_MAX]         = NULL,
         };
diff --git a/libglusterfs/src/options.h b/libglusterfs/src/options.h
index 40089ac6..722cc3b7 100644
--- a/libglusterfs/src/options.h
+++ b/libglusterfs/src/options.h
@@ -44,6 +44,9 @@ typedef enum {
         GF_OPTION_TYPE_TIME,
         GF_OPTION_TYPE_DOUBLE,
         GF_OPTION_TYPE_INTERNET_ADDRESS,
+        GF_OPTION_TYPE_INTERNET_ADDRESS_LIST,
+        GF_OPTION_TYPE_PRIORITY_LIST,
+        GF_OPTION_TYPE_SIZE_LIST,
         GF_OPTION_TYPE_MAX,
 } volume_option_type_t;