Merge tag 'gfs2-v6.3-rc3-fixes' of git://git.kernel.org/pub/scm/linux…

…/kernel/git/gfs2/linux-gfs2

Pull gfs2 updates from Andreas Gruenbacher:

 - Fix revoke processing at unmount and on read-only remount

 - Refuse reading in inodes with an impossible indirect block height

 - Various minor cleanups

* tag 'gfs2-v6.3-rc3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
  gfs2: gfs2_ail_empty_gl no log flush on error
  gfs2: Issue message when revokes cannot be written
  gfs2: Perform second log flush in gfs2_make_fs_ro
  gfs2: return errors from gfs2_ail_empty_gl
  gfs2: Move variable assignment behind a null pointer check in inode_go_dump
  gfs2: Use gfs2_holder_initialized for jindex
  gfs2: Eliminate gfs2_trim_blocks
  gfs2: Fix inode height consistency check
  gfs2: Remove ghs[] from gfs2_unlink
  gfs2: Remove ghs[] from gfs2_link
  gfs2: Remove duplicate i_nlink check from gfs2_link()

fs/gfs2/bmap.c

@@ -2035,14 +2035,6 @@ static int do_shrink(struct inode *inode, u64 newsize)
 	return error;
 }
 
-void gfs2_trim_blocks(struct inode *inode)
-{
-	int ret;
-
-	ret = do_shrink(inode, inode->i_size);
-	WARN_ON(ret != 0);
-}
-
 /**
  * do_grow - Touch and update inode size
  * @inode: The inode

fs/gfs2/bmap.h

@@ -58,7 +58,6 @@ extern int gfs2_get_extent(struct inode *inode, u64 lblock, u64 *dblock,
 extern int gfs2_alloc_extent(struct inode *inode, u64 lblock, u64 *dblock,
 			     unsigned *extlen, bool *new);
 extern int gfs2_setattr_size(struct inode *inode, u64 size);
-extern void gfs2_trim_blocks(struct inode *inode);
 extern int gfs2_truncatei_resume(struct gfs2_inode *ip);
 extern int gfs2_file_dealloc(struct gfs2_inode *ip);
 extern int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset,

fs/gfs2/glops.c

@@ -90,7 +90,7 @@ static int gfs2_ail_empty_gl(struct gfs2_glock *gl)
 	struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 	struct gfs2_trans tr;
 	unsigned int revokes;
-	int ret;
+	int ret = 0;
 
 	revokes = atomic_read(&gl->gl_ail_count);
 
@@ -124,15 +124,18 @@ static int gfs2_ail_empty_gl(struct gfs2_glock *gl)
 	memset(&tr, 0, sizeof(tr));
 	set_bit(TR_ONSTACK, &tr.tr_flags);
 	ret = __gfs2_trans_begin(&tr, sdp, 0, revokes, _RET_IP_);
-	if (ret)
+	if (ret) {
+		fs_err(sdp, "Transaction error %d: Unable to write revokes.", ret);
 		goto flush;
+	}
 	__gfs2_ail_flush(gl, 0, revokes);
 	gfs2_trans_end(sdp);
 
 flush:
-	gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
-		       GFS2_LFC_AIL_EMPTY_GL);
-	return 0;
+	if (!ret)
+		gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
+				GFS2_LFC_AIL_EMPTY_GL);
+	return ret;
 }
 
 void gfs2_ail_flush(struct gfs2_glock *gl, bool fsync)
@@ -326,7 +329,9 @@ static int inode_go_sync(struct gfs2_glock *gl)
 	ret = gfs2_inode_metasync(gl);
 	if (!error)
 		error = ret;
-	gfs2_ail_empty_gl(gl);
+	ret = gfs2_ail_empty_gl(gl);
+	if (!error)
+		error = ret;
 	/*
 	 * Writeback of the data mapping may cause the dirty flag to be set
 	 * so we have to clear it again here.
@@ -396,6 +401,7 @@ static int inode_go_demote_ok(const struct gfs2_glock *gl)
 
 static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
 {
+	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 	const struct gfs2_dinode *str = buf;
 	struct timespec64 atime;
 	u16 height, depth;
@@ -442,7 +448,7 @@ static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
 	/* i_diskflags and i_eattr must be set before gfs2_set_inode_flags() */
 	gfs2_set_inode_flags(inode);
 	height = be16_to_cpu(str->di_height);
-	if (unlikely(height > GFS2_MAX_META_HEIGHT))
+	if (unlikely(height > sdp->sd_max_height))
 		goto corrupt;
 	ip->i_height = (u8)height;
 
@@ -534,12 +540,13 @@ static void inode_go_dump(struct seq_file *seq, struct gfs2_glock *gl,
 			  const char *fs_id_buf)
 {
 	struct gfs2_inode *ip = gl->gl_object;
-	struct inode *inode = &ip->i_inode;
+	struct inode *inode;
 	unsigned long nrpages;
 
 	if (ip == NULL)
 		return;
 
+	inode = &ip->i_inode;
 	xa_lock_irq(&inode->i_data.i_pages);
 	nrpages = inode->i_data.nrpages;
 	xa_unlock_irq(&inode->i_data.i_pages);

fs/gfs2/inode.c

@@ -941,7 +941,7 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
 	struct gfs2_sbd *sdp = GFS2_SB(dir);
 	struct inode *inode = d_inode(old_dentry);
 	struct gfs2_inode *ip = GFS2_I(inode);
-	struct gfs2_holder ghs[2];
+	struct gfs2_holder d_gh, gh;
 	struct buffer_head *dibh;
 	struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
 	int error;
@@ -953,14 +953,14 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
 	if (error)
 		return error;
 
-	gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
-	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
+	gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, &d_gh);
+	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
 
-	error = gfs2_glock_nq(ghs); /* parent */
+	error = gfs2_glock_nq(&d_gh);
 	if (error)
 		goto out_parent;
 
-	error = gfs2_glock_nq(ghs + 1); /* child */
+	error = gfs2_glock_nq(&gh);
 	if (error)
 		goto out_child;
 
@@ -992,9 +992,6 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
 	error = -EPERM;
 	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
 		goto out_gunlock;
-	error = -EINVAL;
-	if (!ip->i_inode.i_nlink)
-		goto out_gunlock;
 	error = -EMLINK;
 	if (ip->i_inode.i_nlink == (u32)-1)
 		goto out_gunlock;
@@ -1049,13 +1046,13 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
 		gfs2_quota_unlock(dip);
 out_gunlock:
 	gfs2_dir_no_add(&da);
-	gfs2_glock_dq(ghs + 1);
+	gfs2_glock_dq(&gh);
 out_child:
-	gfs2_glock_dq(ghs);
+	gfs2_glock_dq(&d_gh);
 out_parent:
 	gfs2_qa_put(dip);
-	gfs2_holder_uninit(ghs);
-	gfs2_holder_uninit(ghs + 1);
+	gfs2_holder_uninit(&d_gh);
+	gfs2_holder_uninit(&gh);
 	return error;
 }
 
@@ -1146,7 +1143,7 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
 	struct gfs2_sbd *sdp = GFS2_SB(dir);
 	struct inode *inode = d_inode(dentry);
 	struct gfs2_inode *ip = GFS2_I(inode);
-	struct gfs2_holder ghs[3];
+	struct gfs2_holder d_gh, r_gh, gh;
 	struct gfs2_rgrpd *rgd;
 	int error;
 
@@ -1156,21 +1153,21 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
 
 	error = -EROFS;
 
-	gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
-	gfs2_holder_init(ip->i_gl,  LM_ST_EXCLUSIVE, 0, ghs + 1);
+	gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, &d_gh);
+	gfs2_holder_init(ip->i_gl,  LM_ST_EXCLUSIVE, 0, &gh);
 
 	rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
 	if (!rgd)
 		goto out_inodes;
 
-	gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, LM_FLAG_NODE_SCOPE, ghs + 2);
+	gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, LM_FLAG_NODE_SCOPE, &r_gh);
 
 
-	error = gfs2_glock_nq(ghs); /* parent */
+	error = gfs2_glock_nq(&d_gh);
 	if (error)
 		goto out_parent;
 
-	error = gfs2_glock_nq(ghs + 1); /* child */
+	error = gfs2_glock_nq(&gh);
 	if (error)
 		goto out_child;
 
@@ -1184,7 +1181,7 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
 			goto out_rgrp;
 	}
 
-	error = gfs2_glock_nq(ghs + 2); /* rgrp */
+	error = gfs2_glock_nq(&r_gh); /* rgrp */
 	if (error)
 		goto out_rgrp;
 
@@ -1200,16 +1197,16 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
 	gfs2_trans_end(sdp);
 
 out_gunlock:
-	gfs2_glock_dq(ghs + 2);
+	gfs2_glock_dq(&r_gh);
 out_rgrp:
-	gfs2_glock_dq(ghs + 1);
+	gfs2_glock_dq(&gh);
 out_child:
-	gfs2_glock_dq(ghs);
+	gfs2_glock_dq(&d_gh);
 out_parent:
-	gfs2_holder_uninit(ghs + 2);
+	gfs2_holder_uninit(&r_gh);
 out_inodes:
-	gfs2_holder_uninit(ghs + 1);
-	gfs2_holder_uninit(ghs);
+	gfs2_holder_uninit(&gh);
+	gfs2_holder_uninit(&d_gh);
 	return error;
 }
 

fs/gfs2/ops_fstype.c

@@ -734,13 +734,11 @@ static int init_journal(struct gfs2_sbd *sdp, int undo)
 	struct inode *master = d_inode(sdp->sd_master_dir);
 	struct gfs2_holder ji_gh;
 	struct gfs2_inode *ip;
-	int jindex = 1;
 	int error = 0;
 
-	if (undo) {
-		jindex = 0;
+	gfs2_holder_mark_uninitialized(&ji_gh);
+	if (undo)
 		goto fail_statfs;
-	}
 
 	sdp->sd_jindex = gfs2_lookup_simple(master, "jindex");
 	if (IS_ERR(sdp->sd_jindex)) {
@@ -852,7 +850,6 @@ static int init_journal(struct gfs2_sbd *sdp, int undo)
 	sdp->sd_log_idle = 1;
 	set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
 	gfs2_glock_dq_uninit(&ji_gh);
-	jindex = 0;
 	INIT_WORK(&sdp->sd_freeze_work, gfs2_freeze_func);
 	return 0;
 
@@ -869,7 +866,7 @@ static int init_journal(struct gfs2_sbd *sdp, int undo)
 		gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
 fail_jindex:
 	gfs2_jindex_free(sdp);
-	if (jindex)
+	if (gfs2_holder_initialized(&ji_gh))
 		gfs2_glock_dq_uninit(&ji_gh);
 fail:
 	iput(sdp->sd_jindex);

fs/gfs2/super.c

@@ -552,6 +552,15 @@ void gfs2_make_fs_ro(struct gfs2_sbd *sdp)
 		gfs2_quota_sync(sdp->sd_vfs, 0);
 		gfs2_statfs_sync(sdp->sd_vfs, 0);
 
+		/* We do two log flushes here. The first one commits dirty inodes
+		 * and rgrps to the journal, but queues up revokes to the ail list.
+		 * The second flush writes out and removes the revokes.
+		 *
+		 * The first must be done before the FLUSH_SHUTDOWN code
+		 * clears the LIVE flag, otherwise it will not be able to start
+		 * a transaction to write its revokes, and the error will cause
+		 * a withdraw of the file system. */
+		gfs2_log_flush(sdp, NULL, GFS2_LFC_MAKE_FS_RO);
 		gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_SHUTDOWN |
 			       GFS2_LFC_MAKE_FS_RO);
 		wait_event_timeout(sdp->sd_log_waitq,