From: Yongqiang Yang <xiaoqiangnk@gmail.com>
To: tytso@mit.edu
Cc: adilger@dilger.ca, linux-ext4@vger.kernel.org,
Yongqiang Yang <xiaoqiangnk@gmail.com>
Subject: [PATCH v2 01/15] ext4: add a function which extends a group without checking parameters
Date: Tue, 30 Aug 2011 16:10:11 +0800 [thread overview]
Message-ID: <1314691825-12295-2-git-send-email-xiaoqiangnk@gmail.com> (raw)
In-Reply-To: <1314691825-12295-1-git-send-email-xiaoqiangnk@gmail.com>
This patch added a function named __ext4_group_extend() whose code
is copied from ext4_group_extend(). __ext4_group_extend() assumes
the parameter is valid and has been checked by caller.
__ext4_group_extend() will be used by new resize implementation. It
can also be used by ext4_group_extend(), but this patch series does
not do this.
Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
---
fs/ext4/resize.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 53 insertions(+), 0 deletions(-)
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 707d3f1..5126aac 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -969,6 +969,59 @@ exit_put:
} /* ext4_group_add */
/*
+ * extend a group without checking assuming that checking has been done.
+ */
+static int __ext4_group_extend(struct super_block *sb,
+ ext4_fsblk_t o_blocks_count, ext4_grpblk_t add)
+{
+ struct ext4_super_block *es = EXT4_SB(sb)->s_es;
+ handle_t *handle;
+ int err = 0, err2;
+
+ /* We will update the superblock, one block bitmap, and
+ * one group descriptor via ext4_group_add_blocks().
+ */
+ handle = ext4_journal_start_sb(sb, 3);
+ if (IS_ERR(handle)) {
+ err = PTR_ERR(handle);
+ ext4_warning(sb, "error %d on journal start", err);
+ goto out;
+ }
+
+ err = ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh);
+ if (err) {
+ ext4_warning(sb, "error %d on journal write access", err);
+ ext4_journal_stop(handle);
+ goto out;
+ }
+
+ ext4_blocks_count_set(es, o_blocks_count + add);
+ ext4_debug("freeing blocks %llu through %llu\n", o_blocks_count,
+ o_blocks_count + add);
+ /* We add the blocks to the bitmap and set the group need init bit */
+ err = ext4_group_add_blocks(handle, sb, o_blocks_count, add);
+ if (err)
+ goto exit_journal;
+ ext4_handle_dirty_super(handle, sb);
+ ext4_debug("freed blocks %llu through %llu\n", o_blocks_count,
+ o_blocks_count + add);
+exit_journal:
+ err2 = ext4_journal_stop(handle);
+ if (err2 && !err)
+ err = err2;
+
+ if (!err) {
+ if (test_opt(sb, DEBUG))
+ printk(KERN_DEBUG "EXT4-fs: extended group to %llu "
+ "blocks\n", ext4_blocks_count(es));
+ update_backups(sb, EXT4_SB(sb)->s_sbh->b_blocknr, (char *)es,
+ sizeof(struct ext4_super_block));
+ }
+out:
+ return err;
+}
+
+/*
* Extend the filesystem to the new number of blocks specified. This entry
* point is only used to extend the current filesystem to the end of the last
* existing group. It can be accessed via ioctl, or by "remount,resize=<size>"
--
1.7.5.1
next prev parent reply other threads:[~2011-08-30 8:53 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-30 8:10 (unknown), Yongqiang Yang
2011-08-30 8:10 ` Yongqiang Yang [this message]
2011-10-30 13:48 ` [PATCH v2 01/15] ext4: add a function which extends a group without checking parameters Yongqiang Yang
2011-11-01 22:24 ` Ted Ts'o
2011-11-08 1:36 ` Yongqiang Yang
2011-08-30 8:10 ` [PATCH v2 02/15] ext4: add a function which adds a new desc to a fs Yongqiang Yang
2011-08-30 8:10 ` [PATCH v2 03/15] ext4: add a function which sets up a new group desc Yongqiang Yang
2011-08-30 8:10 ` [PATCH v2 04/15] ext4: add a function which updates super block Yongqiang Yang
2011-08-30 8:10 ` [PATCH v2 05/15] ext4: add a structure which will be used by 64bit-resize interface Yongqiang Yang
2011-08-30 8:10 ` [PATCH v2 06/15] ext4: add a function which sets up group blocks of a flex groups Yongqiang Yang
2011-08-30 8:10 ` [PATCH v2 07/15] ext4: add a function which adds several group descriptors Yongqiang Yang
2011-08-30 8:10 ` [PATCH v2 08/15] ext4: add a function which sets up a flex groups each time Yongqiang Yang
2011-08-30 8:10 ` [PATCH v2 09/15] ext4: enable ext4_update_super() to handle a flex groups Yongqiang Yang
2011-08-30 8:10 ` [PATCH v2 10/15] ext4: pass verify_reserved_gdb() the number of group decriptors Yongqiang Yang
2011-08-30 8:10 ` [PATCH v2 11/15] ext4: add a new function which allocates bitmaps and inode tables Yongqiang Yang
2011-08-30 8:10 ` [PATCH v2 12/15] ext4: add a new function which adds a flex group to a fs Yongqiang Yang
2011-08-30 8:10 ` [PATCH v2 13/15] ext4: add new online resize interface Yongqiang Yang
2011-08-30 8:10 ` [PATCH v2 14/15] ext4: let ext4_group_extend() use common code Yongqiang Yang
2011-08-30 8:10 ` [PATCH v2 15/15] ext4: let ext4_group_add() " Yongqiang Yang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1314691825-12295-2-git-send-email-xiaoqiangnk@gmail.com \
--to=xiaoqiangnk@gmail.com \
--cc=adilger@dilger.ca \
--cc=linux-ext4@vger.kernel.org \
--cc=tytso@mit.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).