diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/libcfs/libcfs_string.c')
-rw-r--r-- | drivers/staging/lustre/lustre/libcfs/libcfs_string.c | 144 |
1 files changed, 73 insertions, 71 deletions
diff --git a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c index efe5e667a2e5..d40be5396769 100644 --- a/drivers/staging/lustre/lustre/libcfs/libcfs_string.c +++ b/drivers/staging/lustre/lustre/libcfs/libcfs_string.c @@ -214,6 +214,7 @@ cfs_gettok(struct cfs_lstr *next, char delim, struct cfs_lstr *res) res->ls_len = end - res->ls_str + 1; return 1; } +EXPORT_SYMBOL(cfs_gettok); /** * Converts string to integer. @@ -242,6 +243,7 @@ cfs_str2num_check(char *str, int nob, unsigned *num, return (*num >= min && *num <= max); } +EXPORT_SYMBOL(cfs_str2num_check); /** * Parses \<range_expr\> token of the syntax. If \a bracketed is false, @@ -321,6 +323,73 @@ cfs_range_expr_parse(struct cfs_lstr *src, unsigned min, unsigned max, } /** + * 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. * * \retval 1 if \a value matches @@ -339,6 +408,7 @@ cfs_expr_list_match(__u32 value, struct cfs_expr_list *expr_list) return 0; } +EXPORT_SYMBOL(cfs_expr_list_match); /** * Convert express list (\a expr_list) to an array of all matched values @@ -412,8 +482,8 @@ EXPORT_SYMBOL(cfs_expr_list_free); /** * 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, @@ -491,72 +561,4 @@ cfs_expr_list_free_list(struct list_head *list) cfs_expr_list_free(el); } } - -int -cfs_ip_addr_parse(char *str, int len, struct list_head *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; - - 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, struct list_head *list) -{ - struct cfs_expr_list *el; - int i = 0; - - 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(struct list_head *list) -{ - cfs_expr_list_free_list(list); -} -EXPORT_SYMBOL(cfs_ip_addr_free); +EXPORT_SYMBOL(cfs_expr_list_free_list); |