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authorDavid Sterba <dsterba@suse.com>2020-09-15 10:54:23 +0200
committerDavid Sterba <dsterba@suse.com>2020-10-07 12:13:23 +0200
commite2f896b3180e3b5d34b1d174b931205a43072d17 (patch)
tree8d859c9f1ff2a69b08b5efd2ba68890508082165 /fs/btrfs/send.c
parent2c53a14dd30124de9468316933715deaf7443096 (diff)
downloadlinux-e2f896b3180e3b5d34b1d174b931205a43072d17.tar.bz2
btrfs: send: use helpers for unaligned access to header members
The header is mapped onto the send buffer and thus its members may be potentially unaligned so use the helpers instead of directly assigning the pointers. This has worked so far but let's use the helpers to make that clear. Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/send.c')
-rw-r--r--fs/btrfs/send.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index b84f921ed6c0..9f1ee52482c9 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -577,8 +577,8 @@ static int tlv_put(struct send_ctx *sctx, u16 attr, const void *data, int len)
return -EOVERFLOW;
hdr = (struct btrfs_tlv_header *) (sctx->send_buf + sctx->send_size);
- hdr->tlv_type = cpu_to_le16(attr);
- hdr->tlv_len = cpu_to_le16(len);
+ put_unaligned_le16(attr, &hdr->tlv_type);
+ put_unaligned_le16(len, &hdr->tlv_len);
memcpy(hdr + 1, data, len);
sctx->send_size += total_len;
@@ -688,7 +688,7 @@ static int begin_cmd(struct send_ctx *sctx, int cmd)
sctx->send_size += sizeof(*hdr);
hdr = (struct btrfs_cmd_header *)sctx->send_buf;
- hdr->cmd = cpu_to_le16(cmd);
+ put_unaligned_le16(cmd, &hdr->cmd);
return 0;
}
@@ -700,17 +700,17 @@ static int send_cmd(struct send_ctx *sctx)
u32 crc;
hdr = (struct btrfs_cmd_header *)sctx->send_buf;
- hdr->len = cpu_to_le32(sctx->send_size - sizeof(*hdr));
- hdr->crc = 0;
+ put_unaligned_le32(sctx->send_size - sizeof(*hdr), &hdr->len);
+ put_unaligned_le32(0, &hdr->crc);
crc = btrfs_crc32c(0, (unsigned char *)sctx->send_buf, sctx->send_size);
- hdr->crc = cpu_to_le32(crc);
+ put_unaligned_le32(crc, &hdr->crc);
ret = write_buf(sctx->send_filp, sctx->send_buf, sctx->send_size,
&sctx->send_off);
sctx->total_send_size += sctx->send_size;
- sctx->cmd_send_size[le16_to_cpu(hdr->cmd)] += sctx->send_size;
+ sctx->cmd_send_size[get_unaligned_le16(&hdr->cmd)] += sctx->send_size;
sctx->send_size = 0;
return ret;