File 0107-Assemble-cleanup-the-failure-path.patch of Package mdadm.8578

From 3266dc09eeddea05b603bae53e3f80b2b47a9027 Mon Sep 17 00:00:00 2001
From: Guoqing Jiang <gqjiang@suse.com>
Date: Wed, 14 Mar 2018 14:50:37 +0800
Subject: [PATCH] Assemble: cleanup the failure path
Git-commit: 57908e9ebad21e9ea84d9f54684bae3af8f62604
Patch-mainline: mdadm-4.0+
References: bsc#1049126

There are some failure paths which share common codes
before return, so simplify them by move common codes
to the end of function, and just goto out in case
failure happened.

Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
---
 Assemble.c | 58 +++++++++++++++++++++-------------------------------------
 1 file changed, 21 insertions(+), 37 deletions(-)

diff --git a/Assemble.c b/Assemble.c
index 688bfd6..0b979da 100644
--- a/Assemble.c
+++ b/Assemble.c
@@ -1297,13 +1297,13 @@ int Assemble(struct supertype *st, char *mddev,
 	 *    START_ARRAY
 	 *
 	 */
-	int rv;
-	int mdfd;
+	int rv = -1;
+	int mdfd = -1;
 	int clean;
 	int auto_assem = (mddev == NULL && !ident->uuid_set &&
 			  ident->super_minor == UnSet && ident->name[0] == 0
 			  && (ident->container == NULL || ident->member == NULL));
-	struct devs *devices;
+	struct devs *devices = NULL;
 	char *devmap;
 	int *best = NULL; /* indexed by raid_disk */
 	int bestcnt = 0;
@@ -1418,9 +1418,7 @@ try_again:
 			pr_err("Found some drive for an array that is already active: %s\n",
 			       mp->path);
 			pr_err("giving up.\n");
-			if (locked == 1)
-				cluster_release_dlmlock();
-			return 1;
+			goto out;
 		}
 		for (dv = pre_exist->devs; dv; dv = dv->next) {
 			/* We want to add this device to our list,
@@ -1493,9 +1491,7 @@ try_again:
 		st->ss->free_super(st);
 		if (auto_assem)
 			goto try_again;
-		if (locked == 1)
-			cluster_release_dlmlock();
-		return 1;
+		goto out;
 	}
 	mddev = chosen_name;
 	if (get_linux_version() < 2004000 ||
@@ -1522,9 +1518,7 @@ try_again:
 			st->ss->free_super(st);
 			if (auto_assem)
 				goto try_again;
-			if (locked == 1)
-				cluster_release_dlmlock();
-			return 1;
+			goto out;
 		}
 		/* just incase it was started but has no content */
 		ioctl(mdfd, STOP_ARRAY, NULL);
@@ -1549,9 +1543,8 @@ try_again:
 			      c, content, mdfd, mddev,
 			      &most_recent, &bestcnt, &best, inargv);
 	if (devcnt < 0) {
-		if (locked == 1)
-			cluster_release_dlmlock();
-		return 1;
+		mdfd = -3;
+		goto out;
 	}
 
 	if (devcnt == 0) {
@@ -1559,10 +1552,8 @@ try_again:
 		       mddev);
 		if (st)
 			st->ss->free_super(st);
-		close(mdfd);
-		free(devices);
 		free(devmap);
-		return 1;
+		goto out;
 	}
 
 	if (c->update && strcmp(c->update, "byteorder")==0)
@@ -1676,25 +1667,19 @@ try_again:
 				 : (O_RDONLY|O_EXCL)))< 0) {
 			pr_err("Cannot open %s: %s\n",
 			       devices[j].devname, strerror(errno));
-			close(mdfd);
-			free(devices);
-			return 1;
+			goto out;
 		}
 		if (st->ss->load_super(st,fd, NULL)) {
 			close(fd);
 			pr_err("RAID superblock has disappeared from %s\n",
 			       devices[j].devname);
-			close(mdfd);
-			free(devices);
-			return 1;
+			goto out;
 		}
 		close(fd);
 	}
 	if (st->sb == NULL) {
 		pr_err("No suitable drives found for %s\n", mddev);
-		close(mdfd);
-		free(devices);
-		return 1;
+		goto out;
 	}
 	st->ss->getinfo_super(st, content, NULL);
 #ifndef MDASSEMBLE
@@ -1763,17 +1748,13 @@ try_again:
 		if (fd < 0) {
 			pr_err("Could not open %s for write - cannot Assemble array.\n",
 			       devices[chosen_drive].devname);
-			close(mdfd);
-			free(devices);
-			return 1;
+			goto out;
 		}
 		if (st->ss->store_super(st, fd)) {
 			close(fd);
 			pr_err("Could not re-write superblock on %s\n",
 			       devices[chosen_drive].devname);
-			close(mdfd);
-			free(devices);
-			return 1;
+			goto out;
 		}
 		if (c->verbose >= 0)
 			pr_err("Marking array %s as 'clean'\n",
@@ -1832,9 +1813,7 @@ try_again:
 			pr_err("Failed to restore critical section for reshape, sorry.\n");
 			if (c->backup_file == NULL)
 				cont_err("Possibly you needed to specify the --backup-file\n");
-			close(mdfd);
-			free(devices);
-			return err;
+			goto out;
 		}
 	}
 #endif
@@ -1864,6 +1843,7 @@ try_again:
 		ioctl(mdfd, STOP_ARRAY, NULL);
 	free(devices);
 	map_unlock(&map);
+out:
 	if (rv == 0) {
 		wait_for(chosen_name, mdfd);
 		close(mdfd);
@@ -1893,12 +1873,16 @@ try_again:
 				usecs <<= 1;
 			}
 		}
-	} else
+	} else if (mdfd >= 0)
 		close(mdfd);
 
 	/* '2' means 'OK, but not started yet' */
 	if (locked == 1)
 		cluster_release_dlmlock();
+	if (rv == -1) {
+		free(devices);
+		return 1;
+	}
 	return rv == 2 ? 0 : rv;
 }
 
-- 
2.10.0