From: Li Zefan <lizf@cn•fujitsu.com>
To: David Miller <davem@davemloft•net>
Cc: akpm@linux-foundation•org, linux-kernel@vger•kernel.org,
netdev@vger•kernel.org
Subject: [PATCH 01/13] seq_file: Add helpers for iteration over a hlist
Date: Fri, 05 Feb 2010 13:04:04 +0800 [thread overview]
Message-ID: <4B6BA6C4.5030205@cn.fujitsu.com> (raw)
In-Reply-To: <20100204.203216.97839493.davem@davemloft.net>
Some places in kernel need to iterate over a hlist in seq_file,
so provide some common helpers.
Signed-off-by: Li Zefan <lizf@cn•fujitsu.com>
---
Here's the resend of the first patch.
I'll send another patch to add some kerneldoc for seq_list_xxx()
and seq_hlist_xxx().
---
fs/seq_file.c | 37 ++++++++++++++++++++++++++++++++++---
include/linux/seq_file.h | 11 +++++++++++
2 files changed, 45 insertions(+), 3 deletions(-)
diff --git a/fs/seq_file.c b/fs/seq_file.c
index eae7d9d..e833076 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -674,7 +674,6 @@ struct list_head *seq_list_start(struct list_head *head, loff_t pos)
return NULL;
}
-
EXPORT_SYMBOL(seq_list_start);
struct list_head *seq_list_start_head(struct list_head *head, loff_t pos)
@@ -684,7 +683,6 @@ struct list_head *seq_list_start_head(struct list_head *head, loff_t pos)
return seq_list_start(head, pos - 1);
}
-
EXPORT_SYMBOL(seq_list_start_head);
struct list_head *seq_list_next(void *v, struct list_head *head, loff_t *ppos)
@@ -695,5 +693,38 @@ struct list_head *seq_list_next(void *v, struct list_head *head, loff_t *ppos)
++*ppos;
return lh == head ? NULL : lh;
}
-
EXPORT_SYMBOL(seq_list_next);
+
+struct hlist_node *seq_hlist_start(struct hlist_head *head, loff_t pos)
+{
+ struct hlist_node *node;
+
+ hlist_for_each(node, head)
+ if (pos-- == 0)
+ return node;
+ return NULL;
+}
+EXPORT_SYMBOL(seq_hlist_start);
+
+struct hlist_node *seq_hlist_start_head(struct hlist_head *head, loff_t pos)
+{
+ if (!pos)
+ return SEQ_START_TOKEN;
+
+ return seq_hlist_start(head, pos - 1);
+}
+EXPORT_SYMBOL(seq_hlist_start_head);
+
+struct hlist_node *seq_hlist_next(void *v, struct hlist_head *head,
+ loff_t *ppos)
+{
+ struct hlist_node *node = v;
+
+ ++*ppos;
+ if (v == SEQ_START_TOKEN)
+ return head->first;
+ else
+ return node->next;
+}
+EXPORT_SYMBOL(seq_hlist_next);
+
diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h
index 8366d8f..c95bcdc 100644
--- a/include/linux/seq_file.h
+++ b/include/linux/seq_file.h
@@ -135,4 +135,15 @@ extern struct list_head *seq_list_start_head(struct list_head *head,
extern struct list_head *seq_list_next(void *v, struct list_head *head,
loff_t *ppos);
+/*
+ * Helpers for iteration over hlist_head-s in seq_files
+ */
+
+extern struct hlist_node *seq_hlist_start(struct hlist_head *head,
+ loff_t pos);
+extern struct hlist_node *seq_hlist_start_head(struct hlist_head *head,
+ loff_t pos);
+extern struct hlist_node *seq_hlist_next(void *v, struct hlist_head *head,
+ loff_t *ppos);
+
#endif
-- 1.6.3
next prev parent reply other threads:[~2010-02-05 5:03 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-05 1:44 [PATCH 00/13] net: simplify seq_file code Li Zefan
2010-02-05 1:44 ` Li Zefan
2010-02-05 1:58 ` Andrew Morton
2010-02-05 2:12 ` Li Zefan
2010-02-05 4:32 ` David Miller
2010-02-05 5:04 ` Li Zefan [this message]
2010-02-05 1:45 ` [PATCH 02/13] net: add a wrapper sk_entry() Li Zefan
2010-02-05 1:45 ` [PATCH 03/13] net: x25: use seq_hlist_foo() helpers Li Zefan
2010-02-05 1:45 ` [PATCH 04/13] net: rose: " Li Zefan
2010-02-05 1:45 ` [PATCH 05/13] net: packet: " Li Zefan
2010-02-05 1:46 ` [PATCH 06/13] net: netrom: " Li Zefan
2010-02-05 1:46 ` [PATCH 07/13] net: ax25: " Li Zefan
2010-02-05 1:46 ` [PATCH 08/13] net: appletalk: " Li Zefan
2010-02-05 1:46 ` [PATCH 09/13] net: af_key: " Li Zefan
2010-02-05 1:47 ` [PATCH 10/13] net: x25: use seq_list_foo() helpers Li Zefan
2010-02-05 1:47 ` [PATCH 11/13] net: irda: " Li Zefan
2010-02-05 11:46 ` Paulius Zaleckas
2010-02-09 6:57 ` Li Zefan
2010-02-05 1:47 ` [PATCH 12/13] net: ipx: " Li Zefan
2010-02-05 1:47 ` [PATCH 13/13] net: atm: " Li Zefan
-- strict thread matches above, loose matches on Subject: below --
2010-02-09 9:18 [PATCH 00/13] net: simplify seq_file code, revised Li Zefan
2010-02-09 9:18 ` [PATCH 01/13] seq_file: Add helpers for iteration over a hlist Li Zefan
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