DescribeFileSystemPolicy - Amazon Elastic File System


Returns the FileSystemPolicy for the specified EFS file system.

This operation requires permissions for the elasticfilesystem:DescribeFileSystemPolicy action.

Request Syntax

GET /2015-02-01/file-systems/FileSystemId/policy HTTP/1.1

URI Request Parameters

The request uses the following URI parameters.


Specifies which EFS file system to retrieve the FileSystemPolicy for.

Length Constraints: Maximum length of 128.

Pattern: ^(arn:aws[-a-z]*:elasticfilesystem:[0-9a-z-:]+:file-system/fs-[0-9a-f]{8,40}|fs-[0-9a-f]{8,40})$

Required: Yes

Request Body

The request does not have a request body.

Response Syntax

HTTP/1.1 200 Content-type: application/json { "FileSystemId": "string", "Policy": "string" }

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.


Specifies the EFS file system to which the FileSystemPolicy applies.

Type: String

Length Constraints: Maximum length of 128.

Pattern: ^(arn:aws[-a-z]*:elasticfilesystem:[0-9a-z-:]+:file-system/fs-[0-9a-f]{8,40}|fs-[0-9a-f]{8,40})$


The JSON formatted FileSystemPolicy for the EFS file system.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 20000.

Pattern: [\s\S]+



Returned if the request is malformed or contains an error such as an invalid parameter value or a missing required parameter.

HTTP Status Code: 400


Returned if the specified FileSystemId value doesn't exist in the requester's AWS account.

HTTP Status Code: 404


Returned if an error occurred on the server side.

HTTP Status Code: 500


Returned if the default file system policy is in effect for the EFS file system specified.

HTTP Status Code: 404



This example illustrates one usage of DescribeFileSystemPolicy.

Sample Request

GET /2015-02-01/file-systems/fs-01234567/policy HTTP/1.1

Sample Response

{ "FileSystemId": "fs-01234567", "Policy": "{ "Version": "2012-10-17", "Id": "efs-policy-wizard-cdef0123-aaaa-6666-5555-444455556666", "Statement": [ { "Sid": "efs-statement-abcdef01-1111-bbbb-2222-111122224444", "Effect" : "Deny", "Principal": { "AWS": "*" }, "Action": "*", "Resource": "arn:aws:elasticfilesystem:us-east-2:111122223333:file-system/fs-01234567", "Condition": { "Bool": { "aws:SecureTransport": "false" } } }, { "Sid": "efs-statement-01234567-aaaa-3333-4444-111122223333", "Effect": "Allow", "Principal": { "AWS": "*" }, "Action": [ "elasticfilesystem:ClientMount", "elasticfilesystem:ClientWrite" ], "Resource" : "arn:aws:elasticfilesystem:us-east-2:111122223333:file-system/fs-01234567" } ] } }

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: