X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=libcfs%2Flibcfs%2Flibcfs_string.c;h=5549417b84f0f56b7c8cc20f19dcf2387e4191ba;hb=6b6fde1026311a28595ea43af56392ca6ad24d79;hp=00a732a847e41080780d16a2ccb8ebbe9a1abbeb;hpb=19ec037c0a9427250b87a69c53beb153d533ab1c;p=fs%2Flustre-release.git diff --git a/libcfs/libcfs/libcfs_string.c b/libcfs/libcfs/libcfs_string.c index 00a732a..5549417 100644 --- a/libcfs/libcfs/libcfs_string.c +++ b/libcfs/libcfs/libcfs_string.c @@ -15,11 +15,7 @@ * * 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 */ @@ -27,11 +23,10 @@ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. * - * Copyright (c) 2012, Whamcloud, Inc. + * Copyright (c) 2012, 2017, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ - * Lustre is a trademark of Sun Microsystems, Inc. * * String manipulation functions. * @@ -40,196 +35,81 @@ * Author: Nathan Rutman */ -#ifndef EXPORT_SYMTAB -# define EXPORT_SYMTAB -#endif - +#include #include - -/* non-0 = don't match */ -static int cfs_strncasecmp(const char *s1, const char *s2, size_t n) -{ - if (s1 == NULL || s2 == NULL) - return 1; - - if (n == 0) - return 0; - - while (n-- != 0 && tolower(*s1) == tolower(*s2)) { - if (n == 0 || *s1 == '\0' || *s2 == '\0') - break; - s1++; - s2++; - } - - return tolower(*(unsigned char *)s1) - tolower(*(unsigned char *)s2); -} +#include /* Convert a text string to a bitmask */ int cfs_str2mask(const char *str, const char *(*bit2str)(int bit), - int *oldmask, int minmask, int allmask) -{ - const char *debugstr; - char op = 0; - int newmask = minmask, i, len, found = 0; - ENTRY; - - /* must be a list of tokens separated by whitespace - * and optionally an operator ('+' or '-'). If an operator - * appears first in , '*oldmask' is used as the starting point - * (relative), otherwise minmask is used (absolute). An operator - * applies to all following tokens up to the next operator. */ - while (*str != 0) { - while (isspace(*str)) - str++; - if (*str == 0) - break; - if (*str == '+' || *str == '-') { - op = *str++; - if (!found) - /* only if first token is relative */ - newmask = *oldmask; - while (isspace(*str)) - str++; - if (*str == 0) /* trailing op */ - return -EINVAL; - } - - /* find token length */ - for (len = 0; str[len] != 0 && !isspace(str[len]) && - str[len] != '+' && str[len] != '-'; len++); - - /* 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; - } - } - if (!found && len == 3 && - (cfs_strncasecmp(str, "ALL", len) == 0)) { - if (op == '-') - newmask = minmask; - else - newmask = allmask; - found = 1; - } - if (!found) { - CWARN("unknown mask '%.*s'.\n" - "mask usage: [+|-] ...\n", len, str); - return -EINVAL; - } - str += len; - } - - *oldmask = newmask; - return 0; -} -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, ...) + int *oldmask, int minmask, int allmask) { - 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) -{ - size_t i = 0; - char *end; - - /* trim leading spaces */ - while (i < size && *str && isspace(*str)) { - ++i; - ++str; - } - - /* string with all spaces */ - if (*str == '\0') - goto out; - - end = str; - while (i < size && *end != '\0' && !isspace(*end)) { - ++i; - ++end; - } - - *end= '\0'; -out: - return str; -} -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])) + const char *debugstr; + char op = 0; + int newmask = minmask, i, len, found = 0; + + ENTRY; + /* must be a list of tokens separated by whitespace or comma, + * and optionally an operator ('+' or '-'). If an operator + * appears first in , '*oldmask' is used as the starting point + * (relative), otherwise minmask is used (absolute). An operator + * applies to all following tokens up to the next operator. + */ + while (*str != 0) { + while (isspace(*str) || *str == ',') + str++; + if (*str == 0) break; - end--; + if (*str == '+' || *str == '-') { + op = *str++; + if (!found) + /* only if first token is relative */ + newmask = *oldmask; + while (isspace(*str)) + str++; + if (*str == 0) /* trailing op */ + return -EINVAL; + } + + /* find token length */ + for (len = 0; str[len] != 0 && !isspace(str[len]) && + str[len] != '+' && str[len] != '-' && str[len] != ','; + len++); + + /* match token */ + found = 0; + 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 && + (strncasecmp(str, "ALL", len) == 0)) { + if (op == '-') + newmask = minmask; + else + newmask = allmask; + found = 1; + } + if (!found) { + CWARN("unknown mask '%.*s'.\n" + "mask usage: [+|-] ...\n", len, str); + return -EINVAL; + } + str += len; } - *end = 0; - return str; + *oldmask = newmask; + return 0; } -EXPORT_SYMBOL(cfs_trimwhite); +EXPORT_SYMBOL(cfs_str2mask); /** * Extracts tokens from strings. @@ -251,7 +131,7 @@ cfs_gettok(struct cfs_lstr *next, char delim, struct cfs_lstr *res) /* 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--; @@ -278,7 +158,7 @@ cfs_gettok(struct cfs_lstr *next, char delim, struct cfs_lstr *res) /* skip ending whitespaces */ while (--end != res->ls_str) { - if (!cfs_iswhite(*end)) + if (!isspace(*end)) break; } @@ -300,18 +180,47 @@ int 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); @@ -329,12 +238,12 @@ 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) { - struct cfs_range_expr *re; - struct cfs_lstr tok; + struct cfs_range_expr *re; + struct cfs_lstr tok; LIBCFS_ALLOC(re, sizeof(*re)); if (re == NULL) @@ -384,15 +293,81 @@ cfs_range_expr_parse(struct cfs_lstr *src, unsigned min, unsigned max, } } - out: +out: *expr = re; return 0; - failed: +failed: 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. @@ -403,9 +378,9 @@ EXPORT_SYMBOL(cfs_range_expr_parse); int cfs_expr_list_match(__u32 value, struct cfs_expr_list *expr_list) { - struct cfs_range_expr *expr; + 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; @@ -425,12 +400,12 @@ EXPORT_SYMBOL(cfs_expr_list_match); int cfs_expr_list_values(struct cfs_expr_list *expr_list, int max, __u32 **valpp) { - struct cfs_range_expr *expr; - __u32 *val; - int count = 0; - int i; + struct cfs_range_expr *expr; + __u32 *val; + 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++; @@ -446,12 +421,12 @@ cfs_expr_list_values(struct cfs_expr_list *expr_list, int max, __u32 **valpp) 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; @@ -463,6 +438,16 @@ cfs_expr_list_values(struct cfs_expr_list *expr_list, int max, __u32 **valpp) } 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. * @@ -471,12 +456,12 @@ EXPORT_SYMBOL(cfs_expr_list_values); 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)); } @@ -484,32 +469,20 @@ cfs_expr_list_free(struct cfs_expr_list *expr_list) } 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 \ token of the syntax. * - * \retval 1 if \a str parses to \ | \ - * \retval 0 otherwise + * \retval 0 if \a str parses to \ | \ + * \retval -errno otherwise */ int cfs_expr_list_parse(char *str, int len, unsigned min, unsigned max, struct cfs_expr_list **elpp) { - struct cfs_expr_list *expr_list; - struct cfs_range_expr *expr; - struct cfs_lstr src; - int rc; + struct cfs_expr_list *expr_list; + struct cfs_range_expr *expr; + struct cfs_lstr src; + int rc; LIBCFS_ALLOC(expr_list, sizeof(*expr_list)); if (expr_list == NULL) @@ -518,7 +491,7 @@ 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] == ']') { @@ -538,15 +511,12 @@ cfs_expr_list_parse(char *str, int len, unsigned min, unsigned max, if (rc != 0) break; - cfs_list_add_tail(&expr->re_link, - &expr_list->el_exprs); + 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, - &expr_list->el_exprs); - } + if (rc == 0) + list_add_tail(&expr->re_link, &expr_list->el_exprs); } if (rc != 0) @@ -567,84 +537,15 @@ EXPORT_SYMBOL(cfs_expr_list_parse); * \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);