From: Luis Chamberlain <mcgrof@kernel.org>
To: linux-modules@vger.kernel.org, linux-kernel@vger.kernel.org,
pmladek@suse.com, david@redhat.com, petr.pavlu@suse.com,
prarit@redhat.com
Cc: christophe.leroy@csgroup.eu, song@kernel.org, mcgrof@kernel.org,
torvalds@linux-foundation.org
Subject: [RFC 02/12] module: move get_modinfo() helpers all above
Date: Fri, 10 Mar 2023 21:17:02 -0800 [thread overview]
Message-ID: <20230311051712.4095040-3-mcgrof@kernel.org> (raw)
In-Reply-To: <20230311051712.4095040-1-mcgrof@kernel.org>
Instead of forward declaring routines for get_modinfo() just move
everything up. This makes no functional changes.
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
---
kernel/module/main.c | 100 +++++++++++++++++++++----------------------
1 file changed, 48 insertions(+), 52 deletions(-)
diff --git a/kernel/module/main.c b/kernel/module/main.c
index 5f1473eb34e0..6d6e6a6184b5 100644
--- a/kernel/module/main.c
+++ b/kernel/module/main.c
@@ -1016,9 +1016,55 @@ int try_to_force_load(struct module *mod, const char *reason)
#endif
}
-static char *get_modinfo(const struct load_info *info, const char *tag);
+/* Parse tag=value strings from .modinfo section */
+static char *next_string(char *string, unsigned long *secsize)
+{
+ /* Skip non-zero chars */
+ while (string[0]) {
+ string++;
+ if ((*secsize)-- <= 1)
+ return NULL;
+ }
+
+ /* Skip any zero padding. */
+ while (!string[0]) {
+ string++;
+ if ((*secsize)-- <= 1)
+ return NULL;
+ }
+ return string;
+}
+
static char *get_next_modinfo(const struct load_info *info, const char *tag,
- char *prev);
+ char *prev)
+{
+ char *p;
+ unsigned int taglen = strlen(tag);
+ Elf_Shdr *infosec = &info->sechdrs[info->index.info];
+ unsigned long size = infosec->sh_size;
+
+ /*
+ * get_modinfo() calls made before rewrite_section_headers()
+ * must use sh_offset, as sh_addr isn't set!
+ */
+ char *modinfo = (char *)info->hdr + infosec->sh_offset;
+
+ if (prev) {
+ size -= prev - modinfo;
+ modinfo = next_string(prev, &size);
+ }
+
+ for (p = modinfo; p; p = next_string(p, &size)) {
+ if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=')
+ return p + taglen + 1;
+ }
+ return NULL;
+}
+
+static char *get_modinfo(const struct load_info *info, const char *tag)
+{
+ return get_next_modinfo(info, tag, NULL);
+}
static int verify_namespace_is_imported(const struct load_info *info,
const struct kernel_symbol *sym,
@@ -1544,56 +1590,6 @@ static void set_license(struct module *mod, const char *license)
}
}
-/* Parse tag=value strings from .modinfo section */
-static char *next_string(char *string, unsigned long *secsize)
-{
- /* Skip non-zero chars */
- while (string[0]) {
- string++;
- if ((*secsize)-- <= 1)
- return NULL;
- }
-
- /* Skip any zero padding. */
- while (!string[0]) {
- string++;
- if ((*secsize)-- <= 1)
- return NULL;
- }
- return string;
-}
-
-static char *get_next_modinfo(const struct load_info *info, const char *tag,
- char *prev)
-{
- char *p;
- unsigned int taglen = strlen(tag);
- Elf_Shdr *infosec = &info->sechdrs[info->index.info];
- unsigned long size = infosec->sh_size;
-
- /*
- * get_modinfo() calls made before rewrite_section_headers()
- * must use sh_offset, as sh_addr isn't set!
- */
- char *modinfo = (char *)info->hdr + infosec->sh_offset;
-
- if (prev) {
- size -= prev - modinfo;
- modinfo = next_string(prev, &size);
- }
-
- for (p = modinfo; p; p = next_string(p, &size)) {
- if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=')
- return p + taglen + 1;
- }
- return NULL;
-}
-
-static char *get_modinfo(const struct load_info *info, const char *tag)
-{
- return get_next_modinfo(info, tag, NULL);
-}
-
static void setup_modinfo(struct module *mod, struct load_info *info)
{
struct module_attribute *attr;
--
2.39.1
next prev parent reply other threads:[~2023-03-11 5:17 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-11 5:17 [RFC 00/12] module: avoid userspace pressure on unwanted allocations Luis Chamberlain
2023-03-11 5:17 ` [RFC 01/12] module: use goto errors on check_modinfo() and layout_and_allocate() Luis Chamberlain
2023-03-11 5:17 ` Luis Chamberlain [this message]
2023-03-11 5:17 ` [RFC 03/12] module: rename next_string() to module_next_tag_pair() Luis Chamberlain
2023-03-11 5:17 ` [RFC 04/12] module: add a for_each_modinfo_entry() Luis Chamberlain
2023-03-11 5:17 ` [RFC 05/12] module: add debugging alias parsing support Luis Chamberlain
2023-03-11 5:17 ` [RFC 06/12] module: move early sanity checks into a helper Luis Chamberlain
2023-03-11 5:17 ` [RFC 07/12] module: move check_modinfo() early to early_mod_check() Luis Chamberlain
2023-03-11 5:17 ` [RFC 08/12] module: move finished_loading() Luis Chamberlain
2023-03-11 5:17 ` [RFC 09/12] module: extract patient module check into helper Luis Chamberlain
2023-03-11 5:17 ` [RFC 10/12] module: avoid allocation if module is already present and ready Luis Chamberlain
2023-03-11 5:17 ` [RFC 11/12] module: use list_add_tail_rcu() when adding module Luis Chamberlain
2023-03-11 5:17 ` [RFC 12/12] module: use aliases to find module on find_module_all() Luis Chamberlain
2023-03-15 14:43 ` Petr Pavlu
2023-03-15 16:12 ` Luis Chamberlain
2023-03-15 12:24 ` [RFC 00/12] module: avoid userspace pressure on unwanted allocations David Hildenbrand
2023-03-15 16:10 ` Luis Chamberlain
2023-03-15 16:41 ` David Hildenbrand
2023-03-16 23:55 ` Luis Chamberlain
2023-03-16 23:56 ` Luis Chamberlain
2023-03-18 0:11 ` Luis Chamberlain
2023-03-20 9:38 ` David Hildenbrand
2023-03-20 19:40 ` David Hildenbrand
2023-03-20 21:09 ` Luis Chamberlain
2023-03-20 21:15 ` David Hildenbrand
2023-03-20 21:23 ` Luis Chamberlain
2023-03-20 21:27 ` Luis Chamberlain
2023-03-21 19:32 ` David Hildenbrand
2023-03-24 9:27 ` David Hildenbrand
2023-03-24 17:54 ` Luis Chamberlain
2023-03-24 19:11 ` Linus Torvalds
2023-03-24 19:59 ` Luis Chamberlain
2023-03-24 20:28 ` Linus Torvalds
2023-03-24 21:14 ` Luis Chamberlain
2023-03-24 23:27 ` Luis Chamberlain
2023-03-24 23:41 ` Linus Torvalds
2023-03-28 3:44 ` David Hildenbrand
2023-03-28 6:16 ` Luis Chamberlain
2023-03-28 21:02 ` David Hildenbrand
2023-03-29 5:31 ` Luis Chamberlain
2023-03-30 4:42 ` David Hildenbrand
2023-03-21 15:11 ` David Hildenbrand
2023-03-21 16:52 ` Luis Chamberlain
2023-03-21 17:01 ` David Hildenbrand
2023-03-20 9:37 ` David Hildenbrand
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