[Cluster-devel] [PATCH v2 6/6] gfs2: Introduce resource group sharing

[Andreas Gruenbacher]

From: Bob Peterson <rpeterso at redhat.com>

This patch takes advantage of the new glock holder sharing feature for
resource groups.  We have already introduced local resource group
locking in a previous patch, so competing accesses of local processes
are already under control.

Signed-off-by: Bob Peterson <rpeterso at redhat.com>
---
 fs/gfs2/bmap.c  |  2 +-
 fs/gfs2/inode.c |  5 +++--
 fs/gfs2/rgrp.c  | 10 +++++-----
 fs/gfs2/super.c |  3 ++-
 fs/gfs2/xattr.c |  6 ++++--
 5 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 7851540bd8916..f15d58975b62e 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -1491,7 +1491,7 @@ static int sweep_bh_for_rgrps(struct gfs2_inode *ip, struct gfs2_holder *rd_gh,
 				goto out;
 			}
 			ret = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE,
-						 0, rd_gh);
+						 LM_FLAG_NODE_SCOPE, rd_gh);
 			if (ret)
 				goto out;
 
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 648f0ca1ad57e..f757c88b1e4c0 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -1120,7 +1120,7 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
 	if (!rgd)
 		goto out_inodes;
 
-	gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
+	gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, LM_FLAG_NODE_SCOPE, ghs + 2);
 
 
 	error = gfs2_glock_nq(ghs); /* parent */
@@ -1407,7 +1407,8 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
 		 */
 		nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1);
 		if (nrgd)
-			gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
+			gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE,
+					 LM_FLAG_NODE_SCOPE, ghs + num_gh++);
 	}
 
 	for (x = 0; x < num_gh; x++) {
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 95ecd81e61e70..86fa25f1756b3 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -1465,7 +1465,8 @@ int gfs2_fitrim(struct file *filp, void __user *argp)
 
 	while (1) {
 
-		ret = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh);
+		ret = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE,
+					 LM_FLAG_NODE_SCOPE, &gh);
 		if (ret)
 			goto out;
 
@@ -2082,7 +2083,7 @@ int gfs2_inplace_reserve(struct gfs2_inode *ip, struct gfs2_alloc_parms *ap)
 	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 	struct gfs2_rgrpd *begin = NULL;
 	struct gfs2_blkreserv *rs = &ip->i_res;
-	int error = 0, flags = 0;
+	int error = 0, flags = LM_FLAG_NODE_SCOPE;
 	bool rg_locked;
 	u64 last_unlinked = NO_BLOCK;
 	int loops = 0;
@@ -2761,9 +2762,8 @@ void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist)
 				      sizeof(struct gfs2_holder),
 				      GFP_NOFS | __GFP_NOFAIL);
 	for (x = 0; x < rlist->rl_rgrps; x++)
-		gfs2_holder_init(rlist->rl_rgd[x]->rd_gl,
-				LM_ST_EXCLUSIVE, 0,
-				&rlist->rl_ghs[x]);
+		gfs2_holder_init(rlist->rl_rgd[x]->rd_gl, LM_ST_EXCLUSIVE,
+				 LM_FLAG_NODE_SCOPE, &rlist->rl_ghs[x]);
 }
 
 /**
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index ca71163ff7cfd..3f43ac36b1f49 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -1507,7 +1507,8 @@ static int gfs2_dinode_dealloc(struct gfs2_inode *ip)
 		goto out_qs;
 	}
 
-	error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh);
+	error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE,
+				   LM_FLAG_NODE_SCOPE, &gh);
 	if (error)
 		goto out_qs;
 
diff --git a/fs/gfs2/xattr.c b/fs/gfs2/xattr.c
index 996c915a9c97e..dc45b0e13e08a 100644
--- a/fs/gfs2/xattr.c
+++ b/fs/gfs2/xattr.c
@@ -262,7 +262,8 @@ static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
 		return -EIO;
 	}
 
-	error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
+	error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE,
+				   LM_FLAG_NODE_SCOPE, &rg_gh);
 	if (error)
 		return error;
 
@@ -1384,7 +1385,8 @@ static int ea_dealloc_block(struct gfs2_inode *ip)
 		return -EIO;
 	}
 
-	error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh);
+	error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE,
+				   LM_FLAG_NODE_SCOPE, &gh);
 	if (error)
 		return error;
 
-- 
2.19.1.546.g028f9c799.dirty