mdadm/0158-Incremental-remove-obsoleted-calls-to-udisks.patch

From ba489abd688bf70c83e70700aaaec5f5e90889c5 Mon Sep 17 00:00:00 2001
From: Coly Li <colyli@suse.de>
Date: Mon, 14 Aug 2023 00:46:13 +0800
Subject: [PATCH 158/165] Incremental: remove obsoleted calls to udisks

Utility udisks is removed from udev upstream, calling this obsoleted
command in run_udisks() doesn't make any sense now.

This patch removes the calls chain of udisks, which includes routines
run_udisk(), force_remove(), and 2 locations where force_remove() are
called. Considering force_remove() is removed with udisks util, it is
fair to remove Manage_stop() inside force_remove() as well.

In the two modifications where calling force_remove() are removed,
the failure from Manage_subdevs() can be safely ignored, because,
1) udisks doesn't exist, no need to check the return value to umount
   the file system by udisks and remove the component disk again.
2) After the 'I' inremental remove, there is another 'r' hot remove
   following up. The first incremental remove is a best-try effort.

Therefore in this patch, where force_remove() is removed, the return
value of calling Manage_subdevs() is not checked too.

Signed-off-by: Coly Li <colyli@suse.de>
Reviewed-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
Cc: Jes Sorensen <jes@trained-monkey.org>
Signed-off-by: Jes Sorensen <jes@trained-monkey.org>
---
 Incremental.c | 64 +++++++++++----------------------------------------
 1 file changed, 13 insertions(+), 51 deletions(-)

diff --git a/Incremental.c b/Incremental.c
index f13ce027..05b33c45 100644
--- a/Incremental.c
+++ b/Incremental.c
@@ -1628,54 +1628,18 @@ release:
 	return rv;
 }
 
-static void run_udisks(char *arg1, char *arg2)
-{
-	int pid = fork();
-	int status;
-	if (pid == 0) {
-		manage_fork_fds(1);
-		execl("/usr/bin/udisks", "udisks", arg1, arg2, NULL);
-		execl("/bin/udisks", "udisks", arg1, arg2, NULL);
-		exit(1);
-	}
-	while (pid > 0 && wait(&status) != pid)
-		;
-}
-
-static int force_remove(char *devnm, int fd, struct mdinfo *mdi, int verbose)
-{
-	int rv;
-	int devid = devnm2devid(devnm);
-
-	run_udisks("--unmount", map_dev(major(devid), minor(devid), 0));
-	rv = Manage_stop(devnm, fd, verbose, 1);
-	if (rv) {
-		/* At least we can try to trigger a 'remove' */
-		sysfs_uevent(mdi, "remove");
-		if (verbose)
-			pr_err("Fail to stop %s too.\n", devnm);
-	}
-	return rv;
-}
-
 static void remove_from_member_array(struct mdstat_ent *memb,
 				    struct mddev_dev *devlist, int verbose)
 {
-	int rv;
-	struct mdinfo mmdi;
 	int subfd = open_dev(memb->devnm);
 
 	if (subfd >= 0) {
-		rv = Manage_subdevs(memb->devnm, subfd, devlist, verbose,
-				    0, UOPT_UNDEFINED, 0);
-		if (rv & 2) {
-			if (sysfs_init(&mmdi, -1, memb->devnm))
-				pr_err("unable to initialize sysfs for: %s\n",
-				       memb->devnm);
-			else
-				force_remove(memb->devnm, subfd, &mmdi,
-					     verbose);
-		}
+		/*
+		 * Ignore the return value because it's necessary
+		 * to handle failure condition here.
+		 */
+		Manage_subdevs(memb->devnm, subfd, devlist, verbose,
+			       0, UOPT_UNDEFINED, 0);
 		close(subfd);
 	}
 }
@@ -1758,21 +1722,19 @@ int IncrementalRemove(char *devname, char *id_path, int verbose)
 		}
 		free_mdstat(mdstat);
 	} else {
-		rv |= Manage_subdevs(ent->devnm, mdfd, &devlist,
-				    verbose, 0, UOPT_UNDEFINED, 0);
-		if (rv & 2) {
-		/* Failed due to EBUSY, try to stop the array.
-		 * Give udisks a chance to unmount it first.
+		/*
+		 * This 'I' incremental remove is a try-best effort,
+		 * the failure condition can be safely ignored
+		 * because of the following up 'r' remove.
 		 */
-			rv = force_remove(ent->devnm, mdfd, &mdi, verbose);
-			goto end;
-		}
+		Manage_subdevs(ent->devnm, mdfd, &devlist,
+			       verbose, 0, UOPT_UNDEFINED, 0);
 	}
 
 	devlist.disposition = 'r';
 	rv = Manage_subdevs(ent->devnm, mdfd, &devlist,
 			    verbose, 0, UOPT_UNDEFINED, 0);
-end:
+
 	close(mdfd);
 	free_mdstat(ent);
 	return rv;
-- 
2.40.1