add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/ceph/cache.c
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@@ -1,26 +1,14 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Ceph cache definitions.
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  *
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  *  Copyright (C) 2013 by Adfin Solutions, Inc. All Rights Reserved.
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  *  Written by Milosz Tanski (milosz@adfin.com)
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- *
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- *  This program is free software; you can redistribute it and/or modify
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- *  it under the terms of the GNU General Public License version 2
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- *  as published by the Free Software Foundation.
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- *
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- *  This program is distributed in the hope that it will be useful,
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- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- *  GNU General Public License for more details.
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- *
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- *  You should have received a copy of the GNU General Public License
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- *  along with this program; if not, write to:
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- *  Free Software Foundation
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- *  51 Franklin Street, Fifth Floor
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- *  Boston, MA  02111-1301  USA
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- *
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  */
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+#include <linux/ceph/ceph_debug.h>
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+
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+#include <linux/fs_context.h>
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 #include "super.h"
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 #include "cache.h"
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14
 
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@@ -44,7 +32,7 @@
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 	size_t uniq_len;
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 	/* The following members must be last */
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 	struct ceph_fsid fsid;
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-	char uniquifier[0];
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+	char uniquifier[];
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 };
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 static const struct fscache_cookie_def ceph_fscache_fsid_object_def = {
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@@ -62,7 +50,7 @@
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 	fscache_unregister_netfs(&ceph_cache_netfs);
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 }
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-int ceph_fscache_register_fs(struct ceph_fs_client* fsc)
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+int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc)
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 {
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 	const struct ceph_fsid *fsid = &fsc->client->fsid;
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 	const char *fscache_uniq = fsc->mount_options->fscache_uniq;
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@@ -79,8 +67,8 @@
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 		if (uniq_len && memcmp(ent->uniquifier, fscache_uniq, uniq_len))
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 			continue;
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-		pr_err("fscache cookie already registered for fsid %pU\n", fsid);
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-		pr_err("  use fsc=%%s mount option to specify a uniquifier\n");
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+		errorfc(fc, "fscache cookie already registered for fsid %pU, use fsc=<uniquifier> option",
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+		       fsid);
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 		err = -EBUSY;
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 		goto out_unlock;
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 	}
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@@ -108,7 +96,7 @@
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 		list_add_tail(&ent->list, &ceph_fscache_list);
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 	} else {
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 		kfree(ent);
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-		pr_err("unable to register fscache cookie for fsid %pU\n",
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+		errorfc(fc, "unable to register fscache cookie for fsid %pU",
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 		       fsid);
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 		/* all other fs ignore this error */
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 	}