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cifs: always iterate smb sessions using primary channel

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smb sessions and tcons currently hang off primary channel only.
Secondary channels have the lists as empty. Whenever there's a
need to iterate sessions or tcons, we should use the list in the
corresponding primary channel.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Shyam Prasad N 2022-10-28 09:52:26 +00:00 committed by Steve French
parent 30a0b95b13
commit 8abcaeaed3
4 changed files with 25 additions and 5 deletions
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6
fs/cifs/misc.c
View file

@ -400,6 +400,7 @@ is_valid_oplock_break(char *buffer, struct TCP_Server_Info *srv)
{
struct smb_hdr *buf = (struct smb_hdr *)buffer;
struct smb_com_lock_req *pSMB = (struct smb_com_lock_req *)buf;
struct TCP_Server_Info *pserver;
struct cifs_ses *ses;
struct cifs_tcon *tcon;
struct cifsInodeInfo *pCifsInode;
@ -464,9 +465,12 @@ is_valid_oplock_break(char *buffer, struct TCP_Server_Info *srv)
if (!(pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE))
return false;
/* If server is a channel, select the primary channel */
pserver = CIFS_SERVER_IS_CHAN(srv) ? srv->primary_server : srv;
/* look up tcon based on tid & uid */
spin_lock(&cifs_tcp_ses_lock);
list_for_each_entry(ses, &srv->smb_ses_list, smb_ses_list) {
list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
if (tcon->tid != buf->Tid)
continue;

12
fs/cifs/smb2misc.c
View file

@ -135,6 +135,7 @@ static __u32 get_neg_ctxt_len(struct smb2_hdr *hdr, __u32 len,
int
smb2_check_message(char *buf, unsigned int len, struct TCP_Server_Info *server)
{
struct TCP_Server_Info *pserver;
struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
struct smb2_pdu *pdu = (struct smb2_pdu *)shdr;
int hdr_size = sizeof(struct smb2_hdr);
@ -143,6 +144,9 @@ smb2_check_message(char *buf, unsigned int len, struct TCP_Server_Info *server)
__u32 calc_len; /* calculated length */
__u64 mid;
/* If server is a channel, select the primary channel */
pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server;
/*
* Add function to do table lookup of StructureSize by command
* ie Validate the wct via smb2_struct_sizes table above
@ -155,7 +159,7 @@ smb2_check_message(char *buf, unsigned int len, struct TCP_Server_Info *server)
/* decrypt frame now that it is completely read in */
spin_lock(&cifs_tcp_ses_lock);
list_for_each_entry(iter, &server->smb_ses_list, smb_ses_list) {
list_for_each_entry(iter, &pserver->smb_ses_list, smb_ses_list) {
if (iter->Suid == le64_to_cpu(thdr->SessionId)) {
ses = iter;
break;
@ -671,6 +675,7 @@ bool
smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server)
{
struct smb2_oplock_break *rsp = (struct smb2_oplock_break *)buffer;
struct TCP_Server_Info *pserver;
struct cifs_ses *ses;
struct cifs_tcon *tcon;
struct cifsInodeInfo *cinode;
@ -691,9 +696,12 @@ smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server)
cifs_dbg(FYI, "oplock level 0x%x\n", rsp->OplockLevel);
/* If server is a channel, select the primary channel */
pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server;
/* look up tcon based on tid & uid */
spin_lock(&cifs_tcp_ses_lock);
list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
spin_lock(&tcon->open_file_lock);

6
fs/cifs/smb2ops.c
View file

@ -2302,14 +2302,18 @@ static void
smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
{
struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
struct TCP_Server_Info *pserver;
struct cifs_ses *ses;
struct cifs_tcon *tcon;
if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
return;
/* If server is a channel, select the primary channel */
pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server;
spin_lock(&cifs_tcp_ses_lock);
list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
spin_lock(&tcon->tc_lock);

6
fs/cifs/smb2transport.c
View file

@ -136,9 +136,13 @@ int smb2_get_sign_key(__u64 ses_id, struct TCP_Server_Info *server, u8 *key)
static struct cifs_ses *
smb2_find_smb_ses_unlocked(struct TCP_Server_Info *server, __u64 ses_id)
{
struct TCP_Server_Info *pserver;
struct cifs_ses *ses;
list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
/* If server is a channel, select the primary channel */
pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server;
list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
if (ses->Suid != ses_id)
continue;
++ses->ses_count;