diff options
| -rw-r--r-- | include/linux/ceph/messenger.h | 3 | ||||
| -rw-r--r-- | net/ceph/messenger.c | 46 |
2 files changed, 33 insertions, 16 deletions
diff --git a/include/linux/ceph/messenger.h b/include/linux/ceph/messenger.h index 8846ff610502..318da0170a1e 100644 --- a/include/linux/ceph/messenger.h +++ b/include/linux/ceph/messenger.h @@ -89,6 +89,7 @@ static __inline__ bool ceph_msg_data_type_valid(enum ceph_msg_data_type type) } struct ceph_msg_data { + struct list_head links; /* ceph_msg->data */ enum ceph_msg_data_type type; union { #ifdef CONFIG_BLOCK @@ -143,7 +144,7 @@ struct ceph_msg { struct ceph_buffer *middle; size_t data_length; - struct ceph_msg_data *data; + struct list_head data; struct ceph_msg_data_cursor cursor; struct ceph_connection *con; diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index 3aa0f30c3c5e..8bfe7d34bc85 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -985,8 +985,10 @@ static bool ceph_msg_data_pagelist_advance(struct ceph_msg_data_cursor *cursor, static void ceph_msg_data_cursor_init(struct ceph_msg *msg, size_t length) { struct ceph_msg_data_cursor *cursor = &msg->cursor; + struct ceph_msg_data *data; - cursor->data = msg->data; + data = list_first_entry(&msg->data, struct ceph_msg_data, links); + cursor->data = data; switch (cursor->data->type) { case CEPH_MSG_DATA_PAGELIST: ceph_msg_data_pagelist_cursor_init(cursor, length); @@ -1410,7 +1412,7 @@ static int write_partial_message_data(struct ceph_connection *con) dout("%s %p msg %p\n", __func__, con, msg); - if (WARN_ON(!msg->data)) + if (list_empty(&msg->data)) return -EINVAL; /* @@ -2111,7 +2113,7 @@ static int read_partial_msg_data(struct ceph_connection *con) int ret; BUG_ON(!msg); - if (!msg->data) + if (list_empty(&msg->data)) return -EIO; if (do_datacrc) @@ -2963,6 +2965,7 @@ static struct ceph_msg_data *ceph_msg_data_create(enum ceph_msg_data_type type) data = kzalloc(sizeof (*data), GFP_NOFS); if (data) data->type = type; + INIT_LIST_HEAD(&data->links); return data; } @@ -2972,6 +2975,7 @@ static void ceph_msg_data_destroy(struct ceph_msg_data *data) if (!data) return; + WARN_ON(!list_empty(&data->links)); if (data->type == CEPH_MSG_DATA_PAGELIST) { ceph_pagelist_release(data->pagelist); kfree(data->pagelist); @@ -2987,7 +2991,7 @@ void ceph_msg_data_set_pages(struct ceph_msg *msg, struct page **pages, BUG_ON(!pages); BUG_ON(!length); BUG_ON(msg->data_length); - BUG_ON(msg->data != NULL); + BUG_ON(!list_empty(&msg->data)); data = ceph_msg_data_create(CEPH_MSG_DATA_PAGES); BUG_ON(!data); @@ -2995,8 +2999,9 @@ void ceph_msg_data_set_pages(struct ceph_msg *msg, struct page **pages, data->length = length; data->alignment = alignment & ~PAGE_MASK; - msg->data = data; - msg->data_length = length; + BUG_ON(!list_empty(&msg->data)); + list_add_tail(&data->links, &msg->data); + msg->data_length += length; } EXPORT_SYMBOL(ceph_msg_data_set_pages); @@ -3008,14 +3013,14 @@ void ceph_msg_data_set_pagelist(struct ceph_msg *msg, BUG_ON(!pagelist); BUG_ON(!pagelist->length); BUG_ON(msg->data_length); - BUG_ON(msg->data != NULL); + BUG_ON(!list_empty(&msg->data)); data = ceph_msg_data_create(CEPH_MSG_DATA_PAGELIST); BUG_ON(!data); data->pagelist = pagelist; - msg->data = data; - msg->data_length = pagelist->length; + list_add_tail(&data->links, &msg->data); + msg->data_length += pagelist->length; } EXPORT_SYMBOL(ceph_msg_data_set_pagelist); @@ -3027,15 +3032,15 @@ void ceph_msg_data_set_bio(struct ceph_msg *msg, struct bio *bio, BUG_ON(!bio); BUG_ON(msg->data_length); - BUG_ON(msg->data != NULL); + BUG_ON(!list_empty(&msg->data)); data = ceph_msg_data_create(CEPH_MSG_DATA_BIO); BUG_ON(!data); data->bio = bio; data->bio_length = length; - msg->data = data; - msg->data_length = length; + list_add_tail(&data->links, &msg->data); + msg->data_length += length; } EXPORT_SYMBOL(ceph_msg_data_set_bio); #endif /* CONFIG_BLOCK */ @@ -3059,6 +3064,7 @@ struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags, INIT_LIST_HEAD(&m->list_head); kref_init(&m->kref); + INIT_LIST_HEAD(&m->data); /* front */ m->front_max = front_len; @@ -3204,6 +3210,9 @@ void ceph_msg_kfree(struct ceph_msg *m) void ceph_msg_last_put(struct kref *kref) { struct ceph_msg *m = container_of(kref, struct ceph_msg, kref); + LIST_HEAD(data); + struct list_head *links; + struct list_head *next; dout("ceph_msg_put last one on %p\n", m); WARN_ON(!list_empty(&m->list_head)); @@ -3213,8 +3222,15 @@ void ceph_msg_last_put(struct kref *kref) ceph_buffer_put(m->middle); m->middle = NULL; } - ceph_msg_data_destroy(m->data); - m->data = NULL; + + list_splice_init(&m->data, &data); + list_for_each_safe(links, next, &data) { + struct ceph_msg_data *data; + + data = list_entry(links, struct ceph_msg_data, links); + list_del_init(links); + ceph_msg_data_destroy(data); + } m->data_length = 0; if (m->pool) @@ -3227,7 +3243,7 @@ EXPORT_SYMBOL(ceph_msg_last_put); void ceph_msg_dump(struct ceph_msg *msg) { pr_debug("msg_dump %p (front_max %d length %zd)\n", msg, - msg->front_max, msg->data->length); + msg->front_max, msg->data_length); print_hex_dump(KERN_DEBUG, "header: ", DUMP_PREFIX_OFFSET, 16, 1, &msg->hdr, sizeof(msg->hdr), true); |