[PATCH 7/9] smb: client: stop flooding dmesg with automounts

[Paulo Alcantara <pc@manguebit.com>]

Avoid logging info and expected errors when automounting DFS links and
reparse mount points as a share might contain hundreds of them and the
client would end up flooding dmesg.

Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.com>
---
 fs/smb/client/cifsfs.c     | 4 ++--
 fs/smb/client/connect.c    | 3 ++-
 fs/smb/client/dfs.c        | 3 +--
 fs/smb/client/fs_context.h | 2 +-
 fs/smb/client/namespace.c  | 5 +++--
 5 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/fs/smb/client/cifsfs.c b/fs/smb/client/cifsfs.c
index 2a2523c93944..c91cf57f337c 100644
--- a/fs/smb/client/cifsfs.c
+++ b/fs/smb/client/cifsfs.c
@@ -910,7 +910,7 @@ cifs_smb3_do_mount(struct file_system_type *fs_type,
 	if (cifsFYI) {
 		cifs_dbg(FYI, "%s: devname=%s flags=0x%x\n", __func__,
 			 old_ctx->source, flags);
-	} else {
+	} else if (!old_ctx->automount) {
 		cifs_info("Attempting to mount %s\n", old_ctx->source);
 	}
 
@@ -937,7 +937,7 @@ cifs_smb3_do_mount(struct file_system_type *fs_type,
 
 	rc = cifs_mount(cifs_sb, cifs_sb->ctx);
 	if (rc) {
-		if (!(flags & SB_SILENT))
+		if (!(flags & SB_SILENT) && !old_ctx->automount)
 			cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n",
 				 rc);
 		root = ERR_PTR(rc);
diff --git a/fs/smb/client/connect.c b/fs/smb/client/connect.c
index a382f532974a..e71b6933464a 100644
--- a/fs/smb/client/connect.c
+++ b/fs/smb/client/connect.c
@@ -3390,7 +3390,8 @@ int cifs_mount_get_session(struct cifs_mount_ctx *mnt_ctx)
 	ses = cifs_get_smb_ses(server, ctx);
 	if (IS_ERR(ses)) {
 		rc = PTR_ERR(ses);
-		if (rc == -ENOKEY && ctx->sectype == Kerberos)
+		if (rc == -ENOKEY && ctx->sectype == Kerberos &&
+		    !ctx->automount)
 			cifs_dbg(VFS, "Verify user has a krb5 ticket and keyutils is installed\n");
 		ses = NULL;
 		goto out;
diff --git a/fs/smb/client/dfs.c b/fs/smb/client/dfs.c
index 3f6077c68d68..96db96062a8a 100644
--- a/fs/smb/client/dfs.c
+++ b/fs/smb/client/dfs.c
@@ -263,11 +263,10 @@ static int update_fs_context_dstaddr(struct smb3_fs_context *ctx)
 	struct sockaddr *addr = (struct sockaddr *)&ctx->dstaddr;
 	int rc = 0;
 
-	if (!ctx->nodfs && ctx->dfs_automount) {
+	if (!ctx->nodfs && ctx->automount && ctx->dfs_conn) {
 		rc = dns_resolve_server_name_to_ip(ctx->source, addr, NULL);
 		if (!rc)
 			cifs_set_port(addr, ctx->port);
-		ctx->dfs_automount = false;
 	}
 	return rc;
 }
diff --git a/fs/smb/client/fs_context.h b/fs/smb/client/fs_context.h
index 69f9d938b336..5135f7b2e8d3 100644
--- a/fs/smb/client/fs_context.h
+++ b/fs/smb/client/fs_context.h
@@ -282,7 +282,7 @@ struct smb3_fs_context {
 	bool witness:1; /* use witness protocol */
 	char *leaf_fullpath;
 	struct cifs_ses *dfs_root_ses;
-	bool dfs_automount:1; /* set for dfs automount only */
+	bool automount:1; /* set for automounts */
 	enum cifs_reparse_type reparse_type;
 	bool dfs_conn:1; /* set for dfs mounts */
 };
diff --git a/fs/smb/client/namespace.c b/fs/smb/client/namespace.c
index 0f788031b740..9bfc0a592d27 100644
--- a/fs/smb/client/namespace.c
+++ b/fs/smb/client/namespace.c
@@ -220,6 +220,7 @@ static struct vfsmount *cifs_do_automount(struct path *path)
 	tmp.leaf_fullpath = NULL;
 	tmp.UNC = tmp.prepath = NULL;
 	tmp.dfs_root_ses = NULL;
+	tmp.automount = true;
 	fs_context_set_ids(&tmp);
 
 	rc = smb3_fs_context_dup(ctx, &tmp);
@@ -240,9 +241,9 @@ static struct vfsmount *cifs_do_automount(struct path *path)
 		ctx->source = NULL;
 		goto out;
 	}
-	ctx->dfs_automount = ctx->dfs_conn = is_dfs_mount(mntpt);
+	ctx->dfs_conn = is_dfs_mount(mntpt);
 	cifs_dbg(FYI, "%s: ctx: source=%s UNC=%s prepath=%s dfs_automount=%d\n",
-		 __func__, ctx->source, ctx->UNC, ctx->prepath, ctx->dfs_automount);
+		 __func__, ctx->source, ctx->UNC, ctx->prepath, ctx->dfs_conn);
 
 	mnt = fc_mount(fc);
 out:
-- 
2.46.0