VisionFive2 Linux kernel

StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)

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author: Andreas Gruenbacher <agruenba@redhat.com> 2020-11-30 16:07:25 +0100 committer: Andreas Gruenbacher <agruenba@redhat.com> 2020-12-01 00:21:10 +0100 commit: dd0ecf544125639e54056d851e4887dbb94b6d2f parent: 82e938bd5382b322ce81e6cb8fd030987f2da022
Commit Summary:
gfs2: Fix deadlock between gfs2_{create_inode,inode_lookup} and delete_work_func
Diffstat:
1 file changed, 10 insertions, 10 deletions
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index eed1a1bac6f6..65ae4fc28ede 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -150,6 +150,8 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
 		error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
 		if (unlikely(error))
 			goto fail;
+		if (blktype != GFS2_BLKST_UNLINKED)
+			gfs2_cancel_delete_work(io_gl);
 
 		if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) {
 			/*
@@ -180,8 +182,6 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
 		error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
 		if (unlikely(error))
 			goto fail;
-		if (blktype != GFS2_BLKST_UNLINKED)
-			gfs2_cancel_delete_work(ip->i_iopen_gh.gh_gl);
 		glock_set_object(ip->i_iopen_gh.gh_gl, ip);
 		gfs2_glock_put(io_gl);
 		io_gl = NULL;
@@ -725,13 +725,19 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
 	flush_delayed_work(&ip->i_gl->gl_work);
 	glock_set_object(ip->i_gl, ip);
 
-	error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
+	error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
 	if (error)
 		goto fail_free_inode;
+	gfs2_cancel_delete_work(io_gl);
+	glock_set_object(io_gl, ip);
+
+	error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
+	if (error)
+		goto fail_gunlock2;
 
 	error = gfs2_trans_begin(sdp, blocks, 0);
 	if (error)
-		goto fail_free_inode;
+		goto fail_gunlock2;
 
 	if (blocks > 1) {
 		ip->i_eattr = ip->i_no_addr + 1;
@@ -740,18 +746,12 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
 	init_dinode(dip, ip, symname);
 	gfs2_trans_end(sdp);
 
-	error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
-	if (error)
-		goto fail_free_inode;
-
 	BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags));
 
 	error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
 	if (error)
 		goto fail_gunlock2;
 
-	gfs2_cancel_delete_work(ip->i_iopen_gh.gh_gl);
-	glock_set_object(ip->i_iopen_gh.gh_gl, ip);
 	gfs2_set_iop(inode);
 	insert_inode_hash(inode);
 
@@ -803,6 +803,7 @@ fail_gunlock3:
 	gfs2_glock_dq_uninit(&ip->i_iopen_gh);
 fail_gunlock2:
 	clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
+	glock_clear_object(io_gl, ip);
 	gfs2_glock_put(io_gl);
 fail_free_inode:
 	if (ip->i_gl) {