diff options
| -rw-r--r-- | fs/btrfs/send.c | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c index 02df94815ae9..57052fe4033c 100644 --- a/fs/btrfs/send.c +++ b/fs/btrfs/send.c @@ -87,6 +87,7 @@ struct send_ctx { * command (since protocol v2, data must be the last attribute). */ bool put_data; + struct page **send_buf_pages; u64 flags; /* 'flags' member of btrfs_ioctl_send_args is u64 */ /* Protocol version compatibility requested */ u32 proto; @@ -7575,12 +7576,31 @@ long btrfs_ioctl_send(struct inode *inode, struct btrfs_ioctl_send_args *arg) sctx->clone_roots_cnt = arg->clone_sources_count; - if (sctx->proto >= 2) + if (sctx->proto >= 2) { + u32 send_buf_num_pages; + sctx->send_max_size = ALIGN(SZ_16K + BTRFS_MAX_COMPRESSED, PAGE_SIZE); - else + sctx->send_buf = vmalloc(sctx->send_max_size); + if (!sctx->send_buf) { + ret = -ENOMEM; + goto out; + } + send_buf_num_pages = sctx->send_max_size >> PAGE_SHIFT; + sctx->send_buf_pages = kcalloc(send_buf_num_pages, + sizeof(*sctx->send_buf_pages), + GFP_KERNEL); + if (!sctx->send_buf_pages) { + ret = -ENOMEM; + goto out; + } + for (i = 0; i < send_buf_num_pages; i++) { + sctx->send_buf_pages[i] = + vmalloc_to_page(sctx->send_buf + (i << PAGE_SHIFT)); + } + } else { sctx->send_max_size = BTRFS_SEND_BUF_SIZE_V1; - - sctx->send_buf = kvmalloc(sctx->send_max_size, GFP_KERNEL); + sctx->send_buf = kvmalloc(sctx->send_max_size, GFP_KERNEL); + } if (!sctx->send_buf) { ret = -ENOMEM; goto out; @@ -7773,6 +7793,7 @@ out: fput(sctx->send_filp); kvfree(sctx->clone_roots); + kfree(sctx->send_buf_pages); kvfree(sctx->send_buf); name_cache_free(sctx); |