Merge tag 'gfs2-v5.10-rc5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2

Pull gfs2 fixes from Andreas Gruenbacher:
 "Various gfs2 fixes"

* tag 'gfs2-v5.10-rc5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
  gfs2: Fix deadlock between gfs2_{create_inode,inode_lookup} and delete_work_func
  gfs2: Upgrade shared glocks for atime updates
  gfs2: Don't freeze the file system during unmount
  gfs2: check for empty rgrp tree in gfs2_ri_update
  gfs2: set lockdep subclass for iopen glocks
  gfs2: Fix deadlock dumping resource group glocks

fs/gfs2/glock.c

@@ -1035,6 +1035,7 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
 	gl->gl_node.next = NULL;
 	gl->gl_flags = 0;
 	gl->gl_name = name;
+	lockdep_set_subclass(&gl->gl_lockref.lock, glops->go_subclass);
 	gl->gl_lockref.count = 1;
 	gl->gl_state = LM_ST_UNLOCKED;
 	gl->gl_target = LM_ST_UNLOCKED;

fs/gfs2/glops.c

@@ -245,7 +245,7 @@ static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
 static void gfs2_rgrp_go_dump(struct seq_file *seq, struct gfs2_glock *gl,
 			      const char *fs_id_buf)
 {
-	struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
+	struct gfs2_rgrpd *rgd = gl->gl_object;
 
 	if (rgd)
 		gfs2_rgrp_dump(seq, rgd, fs_id_buf);
@@ -582,7 +582,8 @@ static int freeze_go_sync(struct gfs2_glock *gl)
 	 * Once thawed, the work func acquires the freeze glock in
 	 * SH and everybody goes back to thawed.
 	 */
-	if (gl->gl_state == LM_ST_SHARED && !gfs2_withdrawn(sdp)) {
+	if (gl->gl_state == LM_ST_SHARED && !gfs2_withdrawn(sdp) &&
+	    !test_bit(SDF_NORECOVERY, &sdp->sd_flags)) {
 		atomic_set(&sdp->sd_freeze_state, SFS_STARTING_FREEZE);
 		error = freeze_super(sdp->sd_vfs);
 		if (error) {
@@ -781,6 +782,7 @@ const struct gfs2_glock_operations gfs2_iopen_glops = {
 	.go_callback = iopen_go_callback,
 	.go_demote_ok = iopen_go_demote_ok,
 	.go_flags = GLOF_LRU | GLOF_NONDISK,
+	.go_subclass = 1,
 };
 
 const struct gfs2_glock_operations gfs2_flock_glops = {

fs/gfs2/incore.h

@@ -247,6 +247,7 @@ struct gfs2_glock_operations {
 			const char *fs_id_buf);
 	void (*go_callback)(struct gfs2_glock *gl, bool remote);
 	void (*go_free)(struct gfs2_glock *gl);
+	const int go_subclass;
 	const int go_type;
 	const unsigned long go_flags;
 #define GLOF_ASPACE 1 /* address space attached */

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 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
 	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) {
@@ -2116,6 +2117,25 @@ loff_t gfs2_seek_hole(struct file *file, loff_t offset)
 	return vfs_setpos(file, ret, inode->i_sb->s_maxbytes);
 }
 
+static int gfs2_update_time(struct inode *inode, struct timespec64 *time,
+			    int flags)
+{
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_glock *gl = ip->i_gl;
+	struct gfs2_holder *gh;
+	int error;
+
+	gh = gfs2_glock_is_locked_by_me(gl);
+	if (gh && !gfs2_glock_is_held_excl(gl)) {
+		gfs2_glock_dq(gh);
+		gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, gh);
+		error = gfs2_glock_nq(gh);
+		if (error)
+			return error;
+	}
+	return generic_update_time(inode, time, flags);
+}
+
 const struct inode_operations gfs2_file_iops = {
 	.permission = gfs2_permission,
 	.setattr = gfs2_setattr,
@@ -2124,6 +2144,7 @@ const struct inode_operations gfs2_file_iops = {
 	.fiemap = gfs2_fiemap,
 	.get_acl = gfs2_get_acl,
 	.set_acl = gfs2_set_acl,
+	.update_time = gfs2_update_time,
 };
 
 const struct inode_operations gfs2_dir_iops = {
@@ -2143,6 +2164,7 @@ const struct inode_operations gfs2_dir_iops = {
 	.fiemap = gfs2_fiemap,
 	.get_acl = gfs2_get_acl,
 	.set_acl = gfs2_set_acl,
+	.update_time = gfs2_update_time,
 	.atomic_open = gfs2_atomic_open,
 };
 

fs/gfs2/rgrp.c

@@ -985,6 +985,10 @@ static int gfs2_ri_update(struct gfs2_inode *ip)
 	if (error < 0)
 		return error;
 
+	if (RB_EMPTY_ROOT(&sdp->sd_rindex_tree)) {
+		fs_err(sdp, "no resource groups found in the file system.\n");
+		return -ENOENT;
+	}
 	set_rgrp_preferences(sdp);
 
 	sdp->sd_rindex_uptodate = 1;