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authorSteven Whitehouse <swhiteho@redhat.com>2007-10-17 14:05:41 +0100
committerSteven Whitehouse <swhiteho@redhat.com>2008-01-25 08:07:30 +0000
commitc41d4f09f13671f98ba4b82fdc94420cdc09be08 (patch)
treed1a9701517d56673c869077520ea59be9d6dce64 /fs/gfs2
parentb8e7cbb65bcc99630e123422c6829ce3c0fcdf14 (diff)
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[GFS2] Don't hold page lock when starting transaction
This is an addendum to the new AOPs work which moves the point at which we take the page lock so that we don't get it until the last possible moment. This resolves a conflict between starting transactions and the page lock. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/ops_address.c51
1 files changed, 25 insertions, 26 deletions
diff --git a/fs/gfs2/ops_address.c b/fs/gfs2/ops_address.c
index 48913e5..ae782d2 100644
--- a/fs/gfs2/ops_address.c
+++ b/fs/gfs2/ops_address.c
@@ -657,18 +657,10 @@ static int gfs2_write_begin(struct file *file, struct address_space *mapping,
if (unlikely(error))
goto out_uninit;
- error = -ENOMEM;
- page = __grab_cache_page(mapping, index);
- *pagep = page;
- if (!page)
- goto out_unlock;
-
gfs2_write_calc_reserv(ip, len, &data_blocks, &ind_blocks);
-
error = gfs2_write_alloc_required(ip, pos, len, &alloc_required);
if (error)
- goto out_putpage;
-
+ goto out_unlock;
ip->i_alloc.al_requested = 0;
if (alloc_required) {
@@ -699,40 +691,47 @@ static int gfs2_write_begin(struct file *file, struct address_space *mapping,
if (error)
goto out_trans_fail;
+ error = -ENOMEM;
+ page = __grab_cache_page(mapping, index);
+ *pagep = page;
+ if (unlikely(!page))
+ goto out_endtrans;
+
if (gfs2_is_stuffed(ip)) {
+ error = 0;
if (pos + len > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode)) {
error = gfs2_unstuff_dinode(ip, page);
if (error == 0)
goto prepare_write;
- } else if (!PageUptodate(page))
+ } else if (!PageUptodate(page)) {
error = stuffed_readpage(ip, page);
+ }
goto out;
}
prepare_write:
error = block_prepare_write(page, from, to, gfs2_get_block);
-
out:
- if (error) {
- gfs2_trans_end(sdp);
+ if (error == 0)
+ return 0;
+
+ page_cache_release(page);
+ if (pos + len > ip->i_inode.i_size)
+ vmtruncate(&ip->i_inode, ip->i_inode.i_size);
+out_endtrans:
+ gfs2_trans_end(sdp);
out_trans_fail:
- if (alloc_required) {
- gfs2_inplace_release(ip);
+ if (alloc_required) {
+ gfs2_inplace_release(ip);
out_qunlock:
- gfs2_quota_unlock(ip);
+ gfs2_quota_unlock(ip);
out_alloc_put:
- gfs2_alloc_put(ip);
- }
-out_putpage:
- page_cache_release(page);
- if (pos + len > ip->i_inode.i_size)
- vmtruncate(&ip->i_inode, ip->i_inode.i_size);
+ gfs2_alloc_put(ip);
+ }
out_unlock:
- gfs2_glock_dq_m(1, &ip->i_gh);
+ gfs2_glock_dq(&ip->i_gh);
out_uninit:
- gfs2_holder_uninit(&ip->i_gh);
- }
-
+ gfs2_holder_uninit(&ip->i_gh);
return error;
}