Add support for performing remote object copies using the 'copy-from'
operation.
Signed-off-by: Luis Henriques <lhenriques@xxxxxxxx>
---
include/linux/ceph/osd_client.h | 17 ++++++++
include/linux/ceph/rados.h | 19 +++++++++
net/ceph/osd_client.c | 72 +++++++++++++++++++++++++++++++++
3 files changed, 108 insertions(+)
diff --git a/include/linux/ceph/osd_client.h b/include/linux/ceph/osd_client.h
index 02096da01845..f25b4aaaab09 100644
--- a/include/linux/ceph/osd_client.h
+++ b/include/linux/ceph/osd_client.h
@@ -136,6 +136,13 @@ struct ceph_osd_req_op {
u64 expected_object_size;
u64 expected_write_size;
} alloc_hint;
+ struct {
+ u64 snapid;
+ u64 src_version;
+ u8 flags;
+ u32 src_fadvise_flags;
+ struct ceph_osd_data osd_data;
+ } copy_from;
};
};
@@ -511,6 +518,16 @@ extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
struct timespec64 *mtime,
struct page **pages, int nr_pages);
+extern int ceph_osdc_copy_from(struct ceph_osd_client *osdc,
+ u64 src_snapid, u64 src_version,
+ struct ceph_object_id *src_oid,
+ struct ceph_object_locator *src_oloc,
+ u32 src_fadvise_flags,
+ u64 dst_snapid,
+ struct ceph_object_id *dst_oid,
+ struct ceph_object_locator *dst_oloc,
+ u8 dst_fadvise_flags);
+
/* watch/notify */
struct ceph_osd_linger_request *
ceph_osdc_watch(struct ceph_osd_client *osdc,
diff --git a/include/linux/ceph/rados.h b/include/linux/ceph/rados.h
index f1988387c5ad..d47540986eff 100644
--- a/include/linux/ceph/rados.h
+++ b/include/linux/ceph/rados.h
@@ -410,6 +410,14 @@ enum {
enum {
CEPH_OSD_OP_FLAG_EXCL = 1, /* EXCL object create */
CEPH_OSD_OP_FLAG_FAILOK = 2, /* continue despite failure */
+ CEPH_OSD_OP_FLAG_FADVISE_RANDOM = 0x4, /* the op is random */
+ CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL = 0x8, /* the op is sequential */
+ CEPH_OSD_OP_FLAG_FADVISE_WILLNEED = 0x10,/* data will be accessed in
+ the near future */
+ CEPH_OSD_OP_FLAG_FADVISE_DONTNEED = 0x20,/* data will not be accessed
+ in the near future */
+ CEPH_OSD_OP_FLAG_FADVISE_NOCACHE = 0x40,/* data will be accessed only
+ once by this client */
};
#define EOLDSNAPC ERESTART /* ORDERSNAP flag set; writer has old snapc*/
@@ -497,6 +505,17 @@ struct ceph_osd_op {
__le64 expected_object_size;
__le64 expected_write_size;
} __attribute__ ((packed)) alloc_hint;
+ struct {
+ __le64 snapid;
+ __le64 src_version;
+ __u8 flags;
+ /*
+ * __le32 flags: CEPH_OSD_OP_FLAG_FADVISE_: mean the
+ * fadvise flags for dest object src_fadvise_flags mean
+ * the fadvise flags for src object
+ */
+ __le32 src_fadvise_flags;
+ } __attribute__ ((packed)) copy_from;
};
__le32 payload_len;
} __attribute__ ((packed));
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 60934bd8796c..9fd19ff556af 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -955,6 +955,14 @@ static u32 osd_req_encode_op(struct ceph_osd_op *dst,
case CEPH_OSD_OP_CREATE:
case CEPH_OSD_OP_DELETE:
break;
+ case CEPH_OSD_OP_COPY_FROM:
+ dst->copy_from.snapid = cpu_to_le64(src->copy_from.snapid);
+ dst->copy_from.src_version =
+ cpu_to_le64(src->copy_from.src_version);
+ dst->copy_from.flags = src->copy_from.flags;
+ dst->copy_from.src_fadvise_flags =
+ cpu_to_le32(src->copy_from.src_fadvise_flags);
+ break;
default:
pr_err("unsupported osd opcode %s\n",
ceph_osd_op_name(src->op));
@@ -1908,6 +1916,10 @@ static void setup_request_data(struct ceph_osd_request *req,
ceph_osdc_msg_data_add(req->r_reply,
&op->notify.response_data);
break;
+ case CEPH_OSD_OP_COPY_FROM:
+ ceph_osdc_msg_data_add(msg,
+ &op->copy_from.osd_data);
+ break;
}
data_len += op->indata_len;
@@ -5168,6 +5180,66 @@ int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
}
EXPORT_SYMBOL(ceph_osdc_writepages);
+int ceph_osdc_copy_from(struct ceph_osd_client *osdc,
+ u64 src_snapid, u64 src_version,
+ struct ceph_object_id *src_oid,
+ struct ceph_object_locator *src_oloc,
+ u32 src_fadvise_flags,
+ u64 dst_snapid,
+ struct ceph_object_id *dst_oid,
+ struct ceph_object_locator *dst_oloc,
+ u8 dst_fadvise_flags)
+{
+ struct ceph_osd_request *req = NULL;
+ struct ceph_options *opts = osdc->client->options;
+ struct ceph_osd_req_op *op;
+ struct page **pages;
+ void *p, *end;
+ int ret;
+
+ pages = ceph_alloc_page_vector(1, GFP_NOIO);
+ if (IS_ERR(pages))
+ return PTR_ERR(pages);
+ req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
+ if (!req) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ req->r_flags = CEPH_OSD_FLAG_WRITE;
+ op = _osd_req_op_init(req, 0, CEPH_OSD_OP_COPY_FROM, 0);
+ op->copy_from.snapid = src_snapid;
+ op->copy_from.src_version = src_version;
+ op->copy_from.flags = dst_fadvise_flags;
+ op->copy_from.src_fadvise_flags = src_fadvise_flags;
+
+ ceph_oloc_copy(&req->r_t.base_oloc, dst_oloc);
+ ceph_oid_copy(&req->r_t.base_oid, dst_oid);
+
+ p = page_address(pages[0]);
+ end = p + PAGE_SIZE;
+ ceph_encode_string(&p, end, src_oid->name, src_oid->name_len);
+ encode_oloc(&p, end, src_oloc);
+ op->indata_len = PAGE_SIZE - (end - p);
+
+ ceph_osd_data_pages_init(&op->copy_from.osd_data, pages,
+ op->indata_len, 0,
+ false, true);
+ req->r_snapid = dst_snapid;
+ req->r_data_offset = 0; /* XXX dst_off? */
+
+ ret = ceph_osdc_alloc_messages(req, GFP_NOFS);
+ if (ret)
+ goto out;
+ ceph_osdc_start_request(osdc, req, false);
+ ret = wait_request_timeout(req, opts->mount_timeout);
+out:
+ ceph_release_page_vector(pages, 1);
+ if (req)
+ ceph_osdc_put_request(req);
+ return ret;
+}
+EXPORT_SYMBOL(ceph_osdc_copy_from);
+
int __init ceph_osdc_setup(void)
{
size_t size = sizeof(struct ceph_osd_request) +
