[Cluster-devel] [PATCH 7/8] gfs2: gfs2_create_inode: Keep glock across iput
Bob Peterson
rpeterso at redhat.com
Mon Jul 3 17:19:28 UTC 2017
From: Andreas Gruenbacher <agruenba at redhat.com>
On failure, keep the inode glock across the final iput of the new inode
so that gfs2_evict_inode doesn't have to re-acquire the glock. That
way, gfs2_evict_inode won't need to revalidate the block type.
Signed-off-by: Andreas Gruenbacher <agruenba at redhat.com>
Signed-off-by: Bob Peterson <rpeterso at redhat.com>
---
fs/gfs2/inode.c | 4 +++-
fs/gfs2/super.c | 18 ++++++++++++------
2 files changed, 15 insertions(+), 7 deletions(-)
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 50108fa..acca501 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -608,6 +608,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
if (error)
goto fail;
+ gfs2_holder_mark_uninitialized(ghs + 1);
error = create_ok(dip, name, mode);
if (error)
@@ -779,7 +780,6 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
fail_gunlock2:
if (io_gl)
clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
- gfs2_glock_dq_uninit(ghs + 1);
fail_free_inode:
if (ip->i_gl)
gfs2_glock_put(ip->i_gl);
@@ -800,6 +800,8 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
&GFS2_I(inode)->i_flags);
iput(inode);
}
+ if (gfs2_holder_initialized(ghs + 1))
+ gfs2_glock_dq_uninit(ghs + 1);
fail:
return error;
}
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index bd5ad6c..fdedec3 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -1538,6 +1538,12 @@ static void gfs2_evict_inode(struct inode *inode)
if (inode->i_nlink || (sb->s_flags & MS_RDONLY))
goto out;
+ if (test_bit(GIF_ALLOC_FAILED, &ip->i_flags)) {
+ BUG_ON(!gfs2_glock_is_locked_by_me(ip->i_gl));
+ gfs2_holder_mark_uninitialized(&gh);
+ goto alloc_failed;
+ }
+
/* Must not read inode block until block type has been verified */
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh);
if (unlikely(error)) {
@@ -1546,11 +1552,9 @@ static void gfs2_evict_inode(struct inode *inode)
goto out;
}
- if (!test_bit(GIF_ALLOC_FAILED, &ip->i_flags)) {
- error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED);
- if (error)
- goto out_truncate;
- }
+ error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED);
+ if (error)
+ goto out_truncate;
if (test_bit(GIF_INVALID, &ip->i_flags)) {
error = gfs2_inode_refresh(ip);
@@ -1558,6 +1562,7 @@ static void gfs2_evict_inode(struct inode *inode)
goto out_truncate;
}
+alloc_failed:
if (gfs2_holder_initialized(&ip->i_iopen_gh) &&
test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) {
ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
@@ -1624,7 +1629,8 @@ static void gfs2_evict_inode(struct inode *inode)
}
gfs2_holder_uninit(&ip->i_iopen_gh);
}
- gfs2_glock_dq_uninit(&gh);
+ if (gfs2_holder_initialized(&gh))
+ gfs2_glock_dq_uninit(&gh);
if (error && error != GLR_TRYFAILED && error != -EROFS)
fs_warn(sdp, "gfs2_evict_inode: %d\n", error);
out:
--
2.9.4
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