Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d912b0cc1a617d7c590d57b7ea971d50c7f02503
Commit: d912b0cc1a617d7c590d57b7ea971d50c7f02503
Parent: 77b14db502cb85a031fe8fde6c85d52f3e0acb63
Author: Eric W. Biederman <[EMAIL PROTECTED]>
AuthorDate: Wed Feb 14 00:34:13 2007 -0800
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Wed Feb 14 08:10:00 2007 -0800
[PATCH] sysctl: add a parent entry to ctl_table and set the parent entry
Add a parent entry into the ctl_table so you can walk the list of parents
and
find the entire path to a ctl_table entry.
Signed-off-by: Eric W. Biederman <[EMAIL PROTECTED]>
Cc: Stephen Smalley <[EMAIL PROTECTED]>
Cc: James Morris <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
include/linux/sysctl.h | 1 +
kernel/sysctl.c | 18 ++++++++++++++++++
2 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 8915049..1371d7b 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -1022,6 +1022,7 @@ struct ctl_table
int maxlen;
mode_t mode;
ctl_table *child;
+ ctl_table *parent; /* Automatically set */
proc_handler *proc_handler; /* Callback for text formatting */
ctl_handler *strategy; /* Callback function for all r/w */
struct proc_dir_entry *de; /* /proc control block */
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index b3ee791..3ca1d5f 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1240,6 +1240,23 @@ int do_sysctl_strategy (ctl_table *table,
}
#endif /* CONFIG_SYSCTL_SYSCALL */
+static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table
*table)
+{
+ for (; table->ctl_name || table->procname; table++) {
+ table->parent = parent;
+ if (table->child)
+ sysctl_set_parent(table, table->child);
+ }
+}
+
+static __init int sysctl_init(void)
+{
+ sysctl_set_parent(NULL, root_table);
+ return 0;
+}
+
+core_initcall(sysctl_init);
+
/**
* register_sysctl_table - register a sysctl hierarchy
* @table: the top-level table structure
@@ -1318,6 +1335,7 @@ struct ctl_table_header *register_sysctl_table(ctl_table
* table)
INIT_LIST_HEAD(&tmp->ctl_entry);
tmp->used = 0;
tmp->unregistering = NULL;
+ sysctl_set_parent(NULL, table);
spin_lock(&sysctl_lock);
list_add_tail(&tmp->ctl_entry, &root_table_header.ctl_entry);
spin_unlock(&sysctl_lock);
-
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