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ceph: quota: add initial infrastructure to support cephfs quotas

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This patch adds the infrastructure required to support cephfs quotas as it
is currently implemented in the ceph fuse client.  Cephfs quotas can be
set on any directory, and can restrict the number of bytes or the number
of files stored beneath that point in the directory hierarchy.

Quotas are set using the extended attributes 'ceph.quota.max_files' and
'ceph.quota.max_bytes', and can be removed by setting these attributes to
'0'.

Link: http://tracker.ceph.com/issues/22372
Signed-off-by: Luis Henriques <lhenriques@suse.com>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Luis Henriques
2018-01-05 10:47:18 +00:00
committed by Ilya Dryomov
parent 08a79102aa
commit fb18a57568
11 changed files with 180 additions and 1 deletions
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23
fs/ceph/mds_client.c
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@@ -100,6 +100,26 @@ static int parse_reply_info_in(void **p, void *end,
} else
info->inline_version = CEPH_INLINE_NONE;
if (features & CEPH_FEATURE_MDS_QUOTA) {
u8 struct_v, struct_compat;
u32 struct_len;
/*
* both struct_v and struct_compat are expected to be >= 1
*/
ceph_decode_8_safe(p, end, struct_v, bad);
ceph_decode_8_safe(p, end, struct_compat, bad);
if (!struct_v || !struct_compat)
goto bad;
ceph_decode_32_safe(p, end, struct_len, bad);
ceph_decode_need(p, end, struct_len, bad);
ceph_decode_64_safe(p, end, info->max_bytes, bad);
ceph_decode_64_safe(p, end, info->max_files, bad);
} else {
info->max_bytes = 0;
info->max_files = 0;
}
info->pool_ns_len = 0;
info->pool_ns_data = NULL;
if (features & CEPH_FEATURE_FS_FILE_LAYOUT_V2) {
@@ -4082,6 +4102,9 @@ static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
case CEPH_MSG_CLIENT_LEASE:
handle_lease(mdsc, s, msg);
break;
case CEPH_MSG_CLIENT_QUOTA:
ceph_handle_quota(mdsc, s, msg);
break;
default:
pr_err("received unknown message type %d %s\n", type,