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author | Jim Cromie <jim.cromie@gmail.com> | 2020-07-19 17:10:54 -0600 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-24 17:00:09 +0200 |
commit | 14775b04964264189caa4a0862eac05dab8c0502 (patch) | |
tree | 4a7adf29a289d782c102d6c212bbfaac9a4fae3a /lib | |
parent | aaebe329bff0d84e04e74915a828b12a40b55456 (diff) | |
download | linux-14775b04964264189caa4a0862eac05dab8c0502.tar.bz2 |
dyndbg: accept query terms like file=bar and module=foo
Current code expects "keyword" "arg" as 2 words, space separated.
Change to also accept "keyword=arg" form as well, and drop !(nwords%2)
requirement. Then in rest of function, use new keyword, arg variables
instead of word[i], word[i+1]
Acked-by: <jbaron@akamai.com>
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Link: https://lore.kernel.org/r/20200719231058.1586423-15-jim.cromie@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib')
-rw-r--r-- | lib/dynamic_debug.c | 53 |
1 files changed, 33 insertions, 20 deletions
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index 7eb963b1bd11..fad6c34c930d 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -341,7 +341,8 @@ static int check_set(const char **dest, char *src, char *name) /* * Parse words[] as a ddebug query specification, which is a series - * of (keyword, value) pairs chosen from these possibilities: + * of (keyword, value) pairs or combined keyword=value terms, + * chosen from these possibilities: * * func <function-name> * file <full-pathname> @@ -360,22 +361,34 @@ static int ddebug_parse_query(char *words[], int nwords, unsigned int i; int rc = 0; char *fline; - - /* check we have an even number of words */ - if (nwords % 2 != 0) { - pr_err("expecting pairs of match-spec <value>\n"); - return -EINVAL; - } + char *keyword, *arg; if (modname) /* support $modname.dyndbg=<multiple queries> */ query->module = modname; - for (i = 0; i < nwords; i += 2) { - if (!strcmp(words[i], "func")) { - rc = check_set(&query->function, words[i+1], "func"); - } else if (!strcmp(words[i], "file")) { - if (check_set(&query->filename, words[i+1], "file")) + for (i = 0; i < nwords; i++) { + /* accept keyword=arg */ + vpr_info("%d w:%s\n", i, words[i]); + + keyword = words[i]; + arg = strchr(keyword, '='); + if (arg) { + *arg++ = '\0'; + } else { + i++; /* next word is arg */ + if (!(i < nwords)) { + pr_err("missing arg to keyword: %s\n", keyword); + return -EINVAL; + } + arg = words[i]; + } + vpr_info("%d key:%s arg:%s\n", i, keyword, arg); + + if (!strcmp(keyword, "func")) { + rc = check_set(&query->function, arg, "func"); + } else if (!strcmp(keyword, "file")) { + if (check_set(&query->filename, arg, "file")) return -EINVAL; /* tail :$info is function or line-range */ @@ -391,18 +404,18 @@ static int ddebug_parse_query(char *words[], int nwords, if (parse_linerange(query, fline)) return -EINVAL; } - } else if (!strcmp(words[i], "module")) { - rc = check_set(&query->module, words[i+1], "module"); - } else if (!strcmp(words[i], "format")) { - string_unescape_inplace(words[i+1], UNESCAPE_SPACE | + } else if (!strcmp(keyword, "module")) { + rc = check_set(&query->module, arg, "module"); + } else if (!strcmp(keyword, "format")) { + string_unescape_inplace(arg, UNESCAPE_SPACE | UNESCAPE_OCTAL | UNESCAPE_SPECIAL); - rc = check_set(&query->format, words[i+1], "format"); - } else if (!strcmp(words[i], "line")) { - if (parse_linerange(query, words[i+1])) + rc = check_set(&query->format, arg, "format"); + } else if (!strcmp(keyword, "line")) { + if (parse_linerange(query, arg)) return -EINVAL; } else { - pr_err("unknown keyword \"%s\"\n", words[i]); + pr_err("unknown keyword \"%s\"\n", keyword); return -EINVAL; } if (rc) |