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cifs: warn and fail if trying to use rootfs without the config option
If CONFIG_CIFS_ROOT is not set, rootfs mount option is invalid Signed-off-by: Aurelien Aptel <aaptel@suse.com> CC: <stable@vger.kernel.org> # v5.11 Signed-off-by: Steve French <stfrench@microsoft.com>
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@ -1196,9 +1196,11 @@ static int smb3_fs_context_parse_param(struct fs_context *fc,
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pr_warn_once("Witness protocol support is experimental\n");
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break;
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case Opt_rootfs:
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#ifdef CONFIG_CIFS_ROOT
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ctx->rootfs = true;
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#ifndef CONFIG_CIFS_ROOT
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cifs_dbg(VFS, "rootfs support requires CONFIG_CIFS_ROOT config option\n");
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goto cifs_parse_mount_err;
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#endif
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ctx->rootfs = true;
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break;
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case Opt_posixpaths:
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if (result.negated)
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