diff mbox series

[v1,16/23] erofs: add 'uuid' mount option

Message ID 20211227125444.21187-17-jefflexu@linux.alibaba.com (mailing list archive)
State New, archived
Headers show
Series fscache,erofs: fscache-based demand-read semantics | expand

Commit Message

Jingbo Xu Dec. 27, 2021, 12:54 p.m. UTC 
Introduce 'uuid' mount option to enable the nodev mode, in which erofs
could be mounted from blob files instead of blkdev. By then users could
specify the path of bootstrap blob file containing the complete erofs
image.

Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
---
 fs/erofs/super.c | 9 +++++++++
 1 file changed, 9 insertions(+)
diff mbox series

Patch

diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index ea56122f7a35..4f17aedc4acd 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -451,6 +451,7 @@  enum {
 	Opt_dax,
 	Opt_dax_enum,
 	Opt_device,
+	Opt_uuid,
 	Opt_err
 };
 
@@ -475,6 +476,7 @@  static const struct fs_parameter_spec erofs_fs_parameters[] = {
 	fsparam_flag("dax",             Opt_dax),
 	fsparam_enum("dax",		Opt_dax_enum, erofs_dax_param_enums),
 	fsparam_string("device",	Opt_device),
+	fsparam_string("uuid",		Opt_uuid),
 	{}
 };
 
@@ -570,6 +572,12 @@  static int erofs_fc_parse_param(struct fs_context *fc,
 		}
 		++ctx->devs->extra_devices;
 		break;
+	case Opt_uuid:
+		kfree(ctx->opt.uuid);
+		ctx->opt.uuid = kstrdup(param->string, GFP_KERNEL);
+		if (!ctx->opt.uuid)
+			return -ENOMEM;
+		break;
 	default:
 		return -ENOPARAM;
 	}
@@ -784,6 +792,7 @@  static void erofs_fc_free(struct fs_context *fc)
 	struct erofs_fs_context *ctx = fc->fs_private;
 
 	erofs_free_dev_context(ctx->devs);
+	kfree(ctx->opt.uuid);
 	kfree(ctx);
 }