samba 配置简单记录
总体来说，用起来挺简单的，不过需要注意，nfs
linux 作为 samba server
linux 配置
nix 参考: https://gist.github.com/vy-let/a030c1079f09ecae4135aebf1e121ea6
下面仅仅分析 fedora 作为 server
将 fedora 的文件共享给 windows
sudo dnf install samba
sudo systemctl enable smb --now
sudo systemctl status smb
sudo smbpasswd -a martins3
在 /etc/samba/smb.conf 的结尾地方添加:
[public]
path = /home/martins3/data/
browseable = yes
read only = no
guest ok = yes
windows 中的配置
在 windows 虚拟机中，打开文件浏览器, 右键 网络，选择 映射网络驱动器，
在文件夹中填写路径 \\10.0.0.2\public 即可。
注意，这里的 public 和配置文件中对应的，也就是 [public] 的配置。
如果遇到需要密码的时候，但是密码不对
sudo smbpasswd -a martins3
在 windows 那一侧使用 martins3 和新设置的密码来登录。
性能测试
让从 windows 拷贝大文件到 linux 上
可以观测到的 thread:
4 S root 4150 1 0 80 0 - 11593 - Sep14 ? 00:00:00 /nix/store/kj8qz24gbr2hz5my4k39gzzv85ys2lk3-samba-4.20.1/sbin/smbd --foreground --no-process-group
5 S root 4259 4150 0 80 0 - 11060 - Sep14 ? 00:00:00 smbd: notifyd .
1 S root 4260 4150 0 80 0 - 11064 - Sep14 ? 00:00:00 smbd: cleanupd .
5 S martins3 2123125 4150 0 80 0 - 21147 - Sep23 ? 00:00:10 smbd: client [10.0.0.8]
🧀 pstree 4150 -p
smbd(4150)─┬─smbd-cleanupd(4260)
├─smbd-notifyd(4259)
└─smbd[10.0.0.8](2123125)─┬─{smbd[10.0.0.8]}(2720888)
├─{smbd[10.0.0.8]}(2720889)
├─{smbd[10.0.0.8]}(2725297)
├─{smbd[10.0.0.8]}(2726043)
├─{smbd[10.0.0.8]}(2726044)
├─{smbd[10.0.0.8]}(2726045)
├─{smbd[10.0.0.8]}(2727630)
└─{smbd[10.0.0.8]}(2727631)
对于 smbd: client [10.0.0.8] 进行 perf ，可以看到:
sudo perf record --pid 2123125 -g -- sleep 60
看来完全走的用户态，没有使用内核态 smb server :
- 67.04% 0.00% smbd[10.0.0.8] [k] entry_SYSCALL_64_after_hwframe ◆
entry_SYSCALL_64_after_hwframe ▒
- do_syscall_64 ▒
- 33.74% __sys_recvmsg ▒
- 32.99% ___sys_recvmsg ▒
- 32.77% ____sys_recvmsg ▒
- sock_recvmsg ▒
- 32.39% inet_recvmsg ▒
- tcp_recvmsg ▒
- 32.28% tcp_recvmsg_locked ▒
- 22.16% skb_copy_datagram_iter ▒
- __skb_datagram_iter ▒
10.58% _copy_to_iter ▒
- 9.90% __skb_datagram_iter ▒
8.88% _copy_to_iter ▒
- 0.60% simple_copy_to_iter ▒
__check_object_size ▒
- 0.87% simple_copy_to_iter ▒
__check_object_size ▒
- 9.13% __tcp_transmit_skb ▒
- __ip_queue_xmit ▒
- 5.13% ip_finish_output2 ▒
- __dev_queue_xmit ▒
- 4.80% dev_hard_start_xmit ▒
- internal_dev_xmit ▒
- ovs_vport_receive ▒
- 4.12% ovs_dp_process_packet ▒
- 3.22% ovs_execute_actions ▒
- do_execute_actions ▒
- 2.89% __dev_queue_xmit ▒
- 2.35% sch_direct_xmit ▒
- 1.26% dev_hard_start_xmit ▒
- 1.21% rtl8169_start_xmit ▒
0.57% rtl8169_tx_map ▒
0.54% __skb_pad ▒
0.88% _raw_spin_lock ▒
- 0.76% ovs_flow_tbl_lookup_stats ▒
- flow_lookup.isra.0 ▒
masked_flow_lookup ▒
0.50% ovs_flow_key_extract ▒
- 1.64% ip_local_out ▒
- __ip_local_out ▒
- 1.22% nf_hook_slow ▒
0.99% nf_conntrack_update ▒
- 1.23% ip_finish_output ▒
- __cgroup_bpf_run_filter_skb ▒
__bpf_prog_run_save_cb
- 26.12% __x64_sys_pwrite64 ▒
- vfs_write ▒
- 26.01% ext4_buffered_write_iter ▒
- 25.78% generic_perform_write ▒
- 11.14% ext4_da_write_begin ▒
- 5.73% __filemap_get_folio ▒
- 3.00% filemap_add_folio ▒
1.37% __filemap_add_folio ▒
0.83% __mem_cgroup_charge ▒
- 0.69% folio_add_lru ▒
- folio_batch_move_lru ▒
lru_add_fn ▒
- 1.89% folio_alloc_noprof ▒
- alloc_pages_mpol_noprof ▒
- 1.52% __alloc_pages_noprof ▒
0.83% get_page_from_freelist ▒
0.54% filemap_get_entry ▒
- 5.15% ext4_block_write_begin ▒
- 2.66% ext4_da_get_block_prep ▒
- 0.85% ext4_da_reserve_space ▒
0.51% __dquot_alloc_space ▒
0.76% ext4_es_insert_delayed_block ▒
- 2.33% create_empty_buffers ▒
- 1.38% folio_alloc_buffers ▒
- 1.23% alloc_buffer_head ▒
kmem_cache_alloc_noprof ▒
10.92% copy_page_from_iter_atomic ▒
- 2.10% ext4_da_write_end ▒
- 1.96% block_write_end ▒
- __block_commit_write ▒
- 1.11% mark_buffer_dirty ▒
0.84% __folio_mark_dirty ▒
- 1.21% fault_in_iov_iter_readable ▒
fault_in_readable ▒
- 4.95% __x64_sys_epoll_wait ▒
- 4.78% do_epoll_wait ▒
- 3.43% schedule_hrtimeout_range_clock ▒
- 3.09% schedule ▒
- __schedule
- 1.25% dequeue_task_fair ▒
- dequeue_entity ▒
0.52% update_curr ▒
0.53% ep_item_poll.isra.0 ▒
0.67% syscall_exit_to_user_mode ▒
- 0.58% __sys_sendmsg ▒
___sys_sendmsg
这么看，smbd 完全是用户态的啊！但是我记得 kernel 中是有这些东西的啊!
windows 作为 samba server
windows 配置
创建目录 New-Item -Path “C:\Share” -ItemType Directory -Force
然后在图形界面中，右键配置共享
在 linux 中执行如下即可:
smbclient -L //10.0.0.8/ -U "martins3\97936"
如果可以看到如下的结果，那么说明是可以联通的:
Password for [MARTINS3\97936]:
Sharename Type Comment
--------- ---- -------
ADMIN$ Disk 远程管理
C$ Disk 默认共享
IPC$ IPC 远程 IPC
Share Disk
手动连接:
sudo mount -t cifs //10.0.0.8/Share mnt \
-o username=97936,password=1@3456aB,domain=MARTINS3,vers=3.0,iocharset=utf8
client 配置
不使用密码
sudo mkdir -p /etc/samba sudo vim /etc/samba/credentials_martins3
username=97936
password=你的实际密码
domain=MARTINS3
sudo chmod 600 /etc/samba/credentials_martins3 sudo chown root:root /etc/samba/credentials_martins3
sudo mount -t cifs //10.0.0.8/Share mnt
-o credentials=/etc/samba/credentials_martins3,vers=3.0,iocharset=utf8,uid=$(id -u),gid=$(id -g)
自动 mount
最后添加到 /etc/fstab 中如下内容:
//10.0.0.8/Share /home/martins3/hack cifs credentials=/etc/samba/credentials_martins3,vers=3.0,iocharset=utf8,uid=1000,gid=1000,file_mode=0755,dir_mode=0755,nofail 0 0
执行 sudo mount -a
基本观察
可以看看 linux 上的 Samba 的源码是哪里的
├─samba-smbd.service
│ ├─ 4169 /nix/store/mcyfbsbxr2hjr53v2yyvqnsnlg894xk2-samba-4.20.1/sbin/smbd
│ ├─ 4229 smbd: notifyd
│ ├─ 4231 smbd: cleanupd
│ └─760872 smbd: client [10.0.0.8]
性能测试
[global]
time_based=1
runtime=1000
ioengine=io_uring
iodepth=1024
numjobs=2
bs=4k
[trash]
rw=randread
filename=/home/martins3/mnt/a.dump
size=10G
trash: (g=0): rw=randread, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=io_uring, iodepth=1024
...
fio-3.39
Starting 2 processes
trash: Laying out IO file (1 file / 10240MiB)
q^Cs: 2 (f=2): [r(2)][28.7%][r=84.1MiB/s][r=21.5k IOPS][eta 11m:54s]
考虑到网络只有 1Gb ，所以其实还是还不错的。
问题
在映射的目录中，linux 无法构建软连接
ln: failed to create symbolic link '/home/martins3/hack/vm/fedora/iso': Operation not permitted
在映射的目录中，linux 无法构建unix domain socket
这些报错都是完全看不懂的
🧀 nc -l -U a.sock
nc: Permission denied
sudo nc -l -U a.sock
[sudo] password for martins3:
Ncat: bind to a.sock: Permission denied. QUITTING.
有时候遇到这个错误
[Sun Sep 21 00:17:16 2025] CIFS: VFS: \\10.0.0.8 has not responded in 180 seconds. Reconnecting...
[Sun Sep 21 09:38:10 2025] CIFS: VFS: \\10.0.0.8 has not responded in 180 seconds. Reconnecting...
[Sun Sep 21 10:00:51 2025] CIFS: VFS: Autodisabling the use of server inode numbers on \\10.0.0.8\Share
[Sun Sep 21 10:00:51 2025] CIFS: VFS: The server doesn't seem to support them properly or the files might be on different servers (DFS)
[Sun Sep 21 10:00:51 2025] CIFS: VFS: Hardlinks will not be recognized on this mount. Consider mounting with the "noserverino" option to silence this message.
如果 linux 虚拟机和 client 断开之后，那么就会遇到这个错误
[2218377.222530] CIFS: VFS: \\10.0.0.8 has not responded in 180 seconds. Reconnecting...
资源
https://github.com/samba-team/samba
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