*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2012, Intel Corporation.
+ * Copyright (c) 2012, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Author: Nathan Rutman <nathan.rutman@sun.com>
*/
+#include <linux/ctype.h>
#include <libcfs/libcfs.h>
+#include <libcfs/libcfs_string.h>
-/* non-0 = don't match */
-int cfs_strncasecmp(const char *s1, const char *s2, size_t n)
+char *cfs_strrstr(const char *haystack, const char *needle)
{
- if (s1 == NULL || s2 == NULL)
- return 1;
+ char *ptr;
- if (n == 0)
- return 0;
+ if (unlikely(haystack == NULL || needle == NULL))
+ return NULL;
- while (n-- != 0 && tolower(*s1) == tolower(*s2)) {
- if (n == 0 || *s1 == '\0' || *s2 == '\0')
- break;
- s1++;
- s2++;
- }
+ if (strlen(needle) == 1)
+ return strrchr(haystack, needle[0]);
+
+ ptr = strstr(haystack, needle);
+ if (ptr != NULL) {
+ while (1) {
+ char *tmp;
+
+ tmp = strstr(&ptr[1], needle);
+ if (tmp == NULL)
+ return ptr;
+
+ ptr = tmp;
+ }
+ }
- return tolower(*(unsigned char *)s1) - tolower(*(unsigned char *)s2);
+ return NULL;
}
-EXPORT_SYMBOL(cfs_strncasecmp);
+EXPORT_SYMBOL(cfs_strrstr);
/* Convert a text string to a bitmask */
int cfs_str2mask(const char *str, const char *(*bit2str)(int bit),
/* match token */
found = 0;
- for (i = 0; i < 32; i++) {
- debugstr = bit2str(i);
- if (debugstr != NULL &&
- strlen(debugstr) == len &&
- cfs_strncasecmp(str, debugstr, len) == 0) {
- if (op == '-')
- newmask &= ~(1 << i);
- else
- newmask |= (1 << i);
- found = 1;
- break;
- }
- }
+ for (i = 0; i < 32; i++) {
+ debugstr = bit2str(i);
+ if (debugstr != NULL &&
+ strlen(debugstr) == len &&
+ strncasecmp(str, debugstr, len) == 0) {
+ if (op == '-')
+ newmask &= ~BIT(i);
+ else
+ newmask |= BIT(i);
+ found = 1;
+ break;
+ }
+ }
if (!found && len == 3 &&
- (cfs_strncasecmp(str, "ALL", len) == 0)) {
+ (strncasecmp(str, "ALL", len) == 0)) {
if (op == '-')
newmask = minmask;
else
}
EXPORT_SYMBOL(cfs_str2mask);
-/* Duplicate a string in a platform-independent way */
-char *cfs_strdup(const char *str, u_int32_t flags)
-{
- size_t lenz; /* length of str + zero byte */
- char *dup_str;
-
- lenz = strlen(str) + 1;
-
- dup_str = cfs_alloc(lenz, flags);
- if (dup_str == NULL)
- return NULL;
-
- memcpy(dup_str, str, lenz);
-
- return dup_str;
-}
-EXPORT_SYMBOL(cfs_strdup);
-
-/**
- * cfs_{v}snprintf() return the actual size that is printed rather than
- * the size that would be printed in standard functions.
- */
-/* safe vsnprintf */
-int cfs_vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
-{
- int i;
-
- LASSERT(size > 0);
- i = vsnprintf(buf, size, fmt, args);
-
- return (i >= size ? size - 1 : i);
-}
-EXPORT_SYMBOL(cfs_vsnprintf);
-
-/* safe snprintf */
-int cfs_snprintf(char *buf, size_t size, const char *fmt, ...)
-{
- va_list args;
- int i;
-
- va_start(args, fmt);
- i = cfs_vsnprintf(buf, size, fmt, args);
- va_end(args);
-
- return i;
-}
-EXPORT_SYMBOL(cfs_snprintf);
-
/* get the first string out of @str */
char *cfs_firststr(char *str, size_t size)
{
}
EXPORT_SYMBOL(cfs_firststr);
-char *
-cfs_trimwhite(char *str)
-{
- char *end;
-
- while (cfs_iswhite(*str))
- str++;
-
- end = str + strlen(str);
- while (end > str) {
- if (!cfs_iswhite(end[-1]))
- break;
- end--;
- }
-
- *end = 0;
- return str;
-}
-EXPORT_SYMBOL(cfs_trimwhite);
-
/**
* Extracts tokens from strings.
*
/* skip leading white spaces */
while (next->ls_len) {
- if (!cfs_iswhite(*next->ls_str))
+ if (!isspace(*next->ls_str))
break;
next->ls_str++;
next->ls_len--;
/* skip ending whitespaces */
while (--end != res->ls_str) {
- if (!cfs_iswhite(*end))
+ if (!isspace(*end))
break;
}
cfs_str2num_check(char *str, int nob, unsigned *num,
unsigned min, unsigned max)
{
- char *endp;
-
- str = cfs_trimwhite(str);
- *num = strtoul(str, &endp, 0);
- if (endp == str)
- return 0;
+ bool all_numbers = true;
+ char *endp, cache;
+ int len;
+ int rc;
+
+ endp = strim(str);
+ /**
+ * kstrouint can only handle strings composed
+ * of only numbers. We need to scan the string
+ * passed in for the first non-digit character
+ * and end the string at that location. If we
+ * don't find any non-digit character we still
+ * need to place a '\0' at position len since
+ * we are not interested in the rest of the
+ * string which is longer than len in size.
+ * After we are done the character at the
+ * position we placed '\0' must be restored.
+ */
+ len = min((int)strlen(endp), nob);
+ for (; endp < str + len; endp++) {
+ if (!isxdigit(*endp) && *endp != '-' &&
+ *endp != '+') {
+ all_numbers = false;
+ break;
+ }
+ }
- for (; endp < str + nob; endp++) {
- if (!cfs_iswhite(*endp))
- return 0;
+ /* Eat trailing space */
+ if (!all_numbers && isspace(*endp)) {
+ all_numbers = true;
+ endp--;
}
+ cache = *endp;
+ *endp = '\0';
+
+ rc = kstrtouint(str, 0, num);
+ *endp = cache;
+ if (rc || !all_numbers)
+ return 0;
+
return (*num >= min && *num <= max);
}
EXPORT_SYMBOL(cfs_str2num_check);
* \retval 0 will be returned if it can be parsed, otherwise -EINVAL or
* -ENOMEM will be returned.
*/
-int
+static int
cfs_range_expr_parse(struct cfs_lstr *src, unsigned min, unsigned max,
int bracketed, struct cfs_range_expr **expr)
{
LIBCFS_FREE(re, sizeof(*re));
return -EINVAL;
}
-EXPORT_SYMBOL(cfs_range_expr_parse);
+
+/**
+ * Print the range expression \a re into specified \a buffer.
+ * If \a bracketed is true, expression does not need additional
+ * brackets.
+ *
+ * \retval number of characters written
+ */
+static int
+cfs_range_expr_print(char *buffer, int count, struct cfs_range_expr *expr,
+ bool bracketed)
+{
+ int i;
+ char s[] = "[";
+ char e[] = "]";
+
+ if (bracketed)
+ s[0] = e[0] = '\0';
+
+ if (expr->re_lo == expr->re_hi)
+ i = scnprintf(buffer, count, "%u", expr->re_lo);
+ else if (expr->re_stride == 1)
+ i = scnprintf(buffer, count, "%s%u-%u%s",
+ s, expr->re_lo, expr->re_hi, e);
+ else
+ i = scnprintf(buffer, count, "%s%u-%u/%u%s",
+ s, expr->re_lo, expr->re_hi,
+ expr->re_stride, e);
+ return i;
+}
+
+/**
+ * Print a list of range expressions (\a expr_list) into specified \a buffer.
+ * If the list contains several expressions, separate them with comma
+ * and surround the list with brackets.
+ *
+ * \retval number of characters written
+ */
+int
+cfs_expr_list_print(char *buffer, int count, struct cfs_expr_list *expr_list)
+{
+ struct cfs_range_expr *expr;
+ int i = 0, j = 0;
+ int numexprs = 0;
+
+ if (count <= 0)
+ return 0;
+
+ list_for_each_entry(expr, &expr_list->el_exprs, re_link)
+ numexprs++;
+
+ if (numexprs > 1)
+ i += scnprintf(buffer + i, count - i, "[");
+
+ list_for_each_entry(expr, &expr_list->el_exprs, re_link) {
+ if (j++ != 0)
+ i += scnprintf(buffer + i, count - i, ",");
+ i += cfs_range_expr_print(buffer + i, count - i, expr,
+ numexprs > 1);
+ }
+
+ if (numexprs > 1)
+ i += scnprintf(buffer + i, count - i, "]");
+
+ return i;
+}
+EXPORT_SYMBOL(cfs_expr_list_print);
/**
* Matches value (\a value) against ranges expression list \a expr_list.
{
struct cfs_range_expr *expr;
- cfs_list_for_each_entry(expr, &expr_list->el_exprs, re_link) {
+ list_for_each_entry(expr, &expr_list->el_exprs, re_link) {
if (value >= expr->re_lo && value <= expr->re_hi &&
((value - expr->re_lo) % expr->re_stride) == 0)
return 1;
int count = 0;
int i;
- cfs_list_for_each_entry(expr, &expr_list->el_exprs, re_link) {
+ list_for_each_entry(expr, &expr_list->el_exprs, re_link) {
for (i = expr->re_lo; i <= expr->re_hi; i++) {
if (((i - expr->re_lo) % expr->re_stride) == 0)
count++;
return -EINVAL;
}
- LIBCFS_ALLOC(val, sizeof(val[0]) * count);
+ CFS_ALLOC_PTR_ARRAY(val, count);
if (val == NULL)
return -ENOMEM;
count = 0;
- cfs_list_for_each_entry(expr, &expr_list->el_exprs, re_link) {
+ list_for_each_entry(expr, &expr_list->el_exprs, re_link) {
for (i = expr->re_lo; i <= expr->re_hi; i++) {
if (((i - expr->re_lo) % expr->re_stride) == 0)
val[count++] = i;
}
EXPORT_SYMBOL(cfs_expr_list_values);
+void
+cfs_expr_list_values_free(__u32 *values, int num)
+{
+ /* This array is allocated by LIBCFS_ALLOC(), so it shouldn't be freed
+ * by OBD_FREE() if it's called by module other than libcfs & LNet,
+ * otherwise we will see fake memory leak */
+ CFS_FREE_PTR_ARRAY(values, num);
+}
+EXPORT_SYMBOL(cfs_expr_list_values_free);
+
/**
* Frees cfs_range_expr structures of \a expr_list.
*
void
cfs_expr_list_free(struct cfs_expr_list *expr_list)
{
- while (!cfs_list_empty(&expr_list->el_exprs)) {
+ while (!list_empty(&expr_list->el_exprs)) {
struct cfs_range_expr *expr;
- expr = cfs_list_entry(expr_list->el_exprs.next,
- struct cfs_range_expr, re_link),
- cfs_list_del(&expr->re_link);
+ expr = list_entry(expr_list->el_exprs.next,
+ struct cfs_range_expr, re_link);
+ list_del(&expr->re_link);
LIBCFS_FREE(expr, sizeof(*expr));
}
}
EXPORT_SYMBOL(cfs_expr_list_free);
-void
-cfs_expr_list_print(struct cfs_expr_list *expr_list)
-{
- struct cfs_range_expr *expr;
-
- cfs_list_for_each_entry(expr, &expr_list->el_exprs, re_link) {
- CDEBUG(D_WARNING, "%d-%d/%d\n",
- expr->re_lo, expr->re_hi, expr->re_stride);
- }
-}
-EXPORT_SYMBOL(cfs_expr_list_print);
-
/**
* Parses \<cfs_expr_list\> token of the syntax.
*
- * \retval 1 if \a str parses to \<number\> | \<expr_list\>
- * \retval 0 otherwise
+ * \retval 0 if \a str parses to \<number\> | \<expr_list\>
+ * \retval -errno otherwise
*/
int
cfs_expr_list_parse(char *str, int len, unsigned min, unsigned max,
src.ls_str = str;
src.ls_len = len;
- CFS_INIT_LIST_HEAD(&expr_list->el_exprs);
+ INIT_LIST_HEAD(&expr_list->el_exprs);
if (src.ls_str[0] == '[' &&
src.ls_str[src.ls_len - 1] == ']') {
if (rc != 0)
break;
- cfs_list_add_tail(&expr->re_link,
+ list_add_tail(&expr->re_link,
&expr_list->el_exprs);
}
} else {
rc = cfs_range_expr_parse(&src, min, max, 0, &expr);
if (rc == 0) {
- cfs_list_add_tail(&expr->re_link,
+ list_add_tail(&expr->re_link,
&expr_list->el_exprs);
}
}
* \retval none
*/
void
-cfs_expr_list_free_list(cfs_list_t *list)
+cfs_expr_list_free_list(struct list_head *list)
{
struct cfs_expr_list *el;
- while (!cfs_list_empty(list)) {
- el = cfs_list_entry(list->next,
+ while (!list_empty(list)) {
+ el = list_entry(list->next,
struct cfs_expr_list, el_link);
- cfs_list_del(&el->el_link);
+ list_del(&el->el_link);
cfs_expr_list_free(el);
}
}
EXPORT_SYMBOL(cfs_expr_list_free_list);
-
-int
-cfs_ip_addr_parse(char *str, int len, cfs_list_t *list)
-{
- struct cfs_expr_list *el;
- struct cfs_lstr src;
- int rc;
- int i;
-
- src.ls_str = str;
- src.ls_len = len;
- i = 0;
-
- while (src.ls_str != NULL) {
- struct cfs_lstr res;
-
- if (!cfs_gettok(&src, '.', &res)) {
- rc = -EINVAL;
- goto out;
- }
-
- rc = cfs_expr_list_parse(res.ls_str, res.ls_len, 0, 255, &el);
- if (rc != 0)
- goto out;
-
- cfs_list_add_tail(&el->el_link, list);
- i++;
- }
-
- if (i == 4)
- return 0;
-
- rc = -EINVAL;
- out:
- cfs_expr_list_free_list(list);
-
- return rc;
-}
-EXPORT_SYMBOL(cfs_ip_addr_parse);
-
-/**
- * Matches address (\a addr) against address set encoded in \a list.
- *
- * \retval 1 if \a addr matches
- * \retval 0 otherwise
- */
-int
-cfs_ip_addr_match(__u32 addr, cfs_list_t *list)
-{
- struct cfs_expr_list *el;
- int i = 0;
-
- cfs_list_for_each_entry_reverse(el, list, el_link) {
- if (!cfs_expr_list_match(addr & 0xff, el))
- return 0;
- addr >>= 8;
- i++;
- }
-
- return i == 4;
-}
-EXPORT_SYMBOL(cfs_ip_addr_match);
-
-void
-cfs_ip_addr_free(cfs_list_t *list)
-{
- cfs_expr_list_free_list(list);
-}
-EXPORT_SYMBOL(cfs_ip_addr_free);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff