diff options
| author | Pali Rohár <pali@kernel.org> | 2024-10-26 20:55:47 +0200 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2025-04-02 20:01:14 -0500 |
| commit | 28753e4304547a15b33f750fcfe1b1c7b6aa7ad7 (patch) | |
| tree | bf7e13a45f90ed5c1b818d526740a073f6537e64 /fs | |
| parent | f83e10a233059b74eaa2716e903b57464b3d3b0c (diff) | |
cifs: Implement is_network_name_deleted for SMB1
This change allows Linux SMB1 client to autoreconnect the share when it is
modified on server by admin operation which removes and re-adds it.
Implementation is reused from SMB2+ is_network_name_deleted callback. There
are just adjusted checks for error codes and access to struct smb_hdr.
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/smb/client/smb1ops.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/fs/smb/client/smb1ops.c b/fs/smb/client/smb1ops.c index ad89f60207ab..26df807fbe7a 100644 --- a/fs/smb/client/smb1ops.c +++ b/fs/smb/client/smb1ops.c @@ -14,6 +14,8 @@ #include "cifspdu.h" #include "cifs_unicode.h" #include "fs_context.h" +#include "nterr.h" +#include "smberr.h" /* * An NT cancel request header looks just like the original request except: @@ -1062,6 +1064,47 @@ cifs_make_node(unsigned int xid, struct inode *inode, full_path, mode, dev); } +static bool +cifs_is_network_name_deleted(char *buf, struct TCP_Server_Info *server) +{ + struct smb_hdr *shdr = (struct smb_hdr *)buf; + struct TCP_Server_Info *pserver; + struct cifs_ses *ses; + struct cifs_tcon *tcon; + + if (shdr->Flags2 & SMBFLG2_ERR_STATUS) { + if (shdr->Status.CifsError != cpu_to_le32(NT_STATUS_NETWORK_NAME_DELETED)) + return false; + } else { + if (shdr->Status.DosError.ErrorClass != ERRSRV || + shdr->Status.DosError.Error != cpu_to_le16(ERRinvtid)) + return false; + } + + /* If server is a channel, select the primary channel */ + pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; + + spin_lock(&cifs_tcp_ses_lock); + list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { + if (cifs_ses_exiting(ses)) + continue; + list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { + if (tcon->tid == shdr->Tid) { + spin_lock(&tcon->tc_lock); + tcon->need_reconnect = true; + spin_unlock(&tcon->tc_lock); + spin_unlock(&cifs_tcp_ses_lock); + pr_warn_once("Server share %s deleted.\n", + tcon->tree_name); + return true; + } + } + } + spin_unlock(&cifs_tcp_ses_lock); + + return false; +} + struct smb_version_operations smb1_operations = { .send_cancel = send_nt_cancel, .compare_fids = cifs_compare_fids, @@ -1146,6 +1189,7 @@ struct smb_version_operations smb1_operations = { .get_acl_by_fid = get_cifs_acl_by_fid, .set_acl = set_cifs_acl, .make_node = cifs_make_node, + .is_network_name_deleted = cifs_is_network_name_deleted, }; struct smb_version_values smb1_values = { |