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path: root/fs/cifs/connect.c
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Diffstat (limited to 'fs/cifs/connect.c')
-rw-r--r--fs/cifs/connect.c825
1 files changed, 411 insertions, 414 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 2df8e6d0fb0..204bd135436 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -124,7 +124,7 @@ static int
cifs_reconnect(struct TCP_Server_Info *server)
{
int rc = 0;
- struct list_head *tmp;
+ struct list_head *tmp, *tmp2;
struct cifsSesInfo *ses;
struct cifsTconInfo *tcon;
struct mid_q_entry *mid_entry;
@@ -144,23 +144,17 @@ cifs_reconnect(struct TCP_Server_Info *server)
/* before reconnecting the tcp session, mark the smb session (uid)
and the tid bad so they are not used until reconnected */
- read_lock(&GlobalSMBSeslock);
- list_for_each(tmp, &GlobalSMBSessionList) {
- ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
- if (ses->server) {
- if (ses->server == server) {
- ses->status = CifsNeedReconnect;
- ses->ipc_tid = 0;
- }
+ read_lock(&cifs_tcp_ses_lock);
+ list_for_each(tmp, &server->smb_ses_list) {
+ ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
+ ses->need_reconnect = true;
+ ses->ipc_tid = 0;
+ list_for_each(tmp2, &ses->tcon_list) {
+ tcon = list_entry(tmp2, struct cifsTconInfo, tcon_list);
+ tcon->need_reconnect = true;
}
- /* else tcp and smb sessions need reconnection */
- }
- list_for_each(tmp, &GlobalTreeConnectionList) {
- tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
- if ((tcon->ses) && (tcon->ses->server == server))
- tcon->tidStatus = CifsNeedReconnect;
}
- read_unlock(&GlobalSMBSeslock);
+ read_unlock(&cifs_tcp_ses_lock);
/* do not want to be sending data on a socket we are freeing */
down(&server->tcpSem);
if (server->ssocket) {
@@ -193,7 +187,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
while ((server->tcpStatus != CifsExiting) &&
(server->tcpStatus != CifsGood)) {
try_to_freeze();
- if (server->protocolType == IPV6) {
+ if (server->addr.sockAddr6.sin6_family == AF_INET6) {
rc = ipv6_connect(&server->addr.sockAddr6,
&server->ssocket, server->noautotune);
} else {
@@ -417,9 +411,14 @@ incomplete_rcv:
msleep(1); /* minimum sleep to prevent looping
allowing socket to clear and app threads to set
tcpStatus CifsNeedReconnect if server hung */
- if (pdu_length < 4)
+ if (pdu_length < 4) {
+ iov.iov_base = (4 - pdu_length) +
+ (char *)smb_buffer;
+ iov.iov_len = pdu_length;
+ smb_msg.msg_control = NULL;
+ smb_msg.msg_controllen = 0;
goto incomplete_rcv;
- else
+ } else
continue;
} else if (length <= 0) {
if (server->tcpStatus == CifsNew) {
@@ -654,6 +653,11 @@ multi_t2_fnd:
}
} /* end while !EXITING */
+ /* take it off the list, if it's not already */
+ write_lock(&cifs_tcp_ses_lock);
+ list_del_init(&server->tcp_ses_list);
+ write_unlock(&cifs_tcp_ses_lock);
+
spin_lock(&GlobalMid_Lock);
server->tcpStatus = CifsExiting;
spin_unlock(&GlobalMid_Lock);
@@ -686,29 +690,29 @@ multi_t2_fnd:
if (smallbuf) /* no sense logging a debug message if NULL */
cifs_small_buf_release(smallbuf);
- read_lock(&GlobalSMBSeslock);
+ /*
+ * BB: we shouldn't have to do any of this. It shouldn't be
+ * possible to exit from the thread with active SMB sessions
+ */
+ read_lock(&cifs_tcp_ses_lock);
if (list_empty(&server->pending_mid_q)) {
/* loop through server session structures attached to this and
mark them dead */
- list_for_each(tmp, &GlobalSMBSessionList) {
- ses =
- list_entry(tmp, struct cifsSesInfo,
- cifsSessionList);
- if (ses->server == server) {
- ses->status = CifsExiting;
- ses->server = NULL;
- }
+ list_for_each(tmp, &server->smb_ses_list) {
+ ses = list_entry(tmp, struct cifsSesInfo,
+ smb_ses_list);
+ ses->status = CifsExiting;
+ ses->server = NULL;
}
- read_unlock(&GlobalSMBSeslock);
+ read_unlock(&cifs_tcp_ses_lock);
} else {
/* although we can not zero the server struct pointer yet,
since there are active requests which may depnd on them,
mark the corresponding SMB sessions as exiting too */
- list_for_each(tmp, &GlobalSMBSessionList) {
+ list_for_each(tmp, &server->smb_ses_list) {
ses = list_entry(tmp, struct cifsSesInfo,
- cifsSessionList);
- if (ses->server == server)
- ses->status = CifsExiting;
+ smb_ses_list);
+ ses->status = CifsExiting;
}
spin_lock(&GlobalMid_Lock);
@@ -723,7 +727,7 @@ multi_t2_fnd:
}
}
spin_unlock(&GlobalMid_Lock);
- read_unlock(&GlobalSMBSeslock);
+ read_unlock(&cifs_tcp_ses_lock);
/* 1/8th of sec is more than enough time for them to exit */
msleep(125);
}
@@ -745,14 +749,13 @@ multi_t2_fnd:
if there are any pointing to this (e.g
if a crazy root user tried to kill cifsd
kernel thread explicitly this might happen) */
- write_lock(&GlobalSMBSeslock);
- list_for_each(tmp, &GlobalSMBSessionList) {
- ses = list_entry(tmp, struct cifsSesInfo,
- cifsSessionList);
- if (ses->server == server)
- ses->server = NULL;
+ /* BB: This shouldn't be necessary, see above */
+ read_lock(&cifs_tcp_ses_lock);
+ list_for_each(tmp, &server->smb_ses_list) {
+ ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
+ ses->server = NULL;
}
- write_unlock(&GlobalSMBSeslock);
+ read_unlock(&cifs_tcp_ses_lock);
kfree(server->hostname);
task_to_wake = xchg(&server->tsk, NULL);
@@ -1352,94 +1355,158 @@ cifs_parse_mount_options(char *options, const char *devname,
return 0;
}
-static struct cifsSesInfo *
-cifs_find_tcp_session(struct in_addr *target_ip_addr,
- struct in6_addr *target_ip6_addr,
- char *userName, struct TCP_Server_Info **psrvTcp)
+static struct TCP_Server_Info *
+cifs_find_tcp_session(struct sockaddr *addr)
{
struct list_head *tmp;
- struct cifsSesInfo *ses;
-
- *psrvTcp = NULL;
+ struct TCP_Server_Info *server;
+ struct sockaddr_in *addr4 = (struct sockaddr_in *) addr;
+ struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) addr;
+
+ write_lock(&cifs_tcp_ses_lock);
+ list_for_each(tmp, &cifs_tcp_ses_list) {
+ server = list_entry(tmp, struct TCP_Server_Info,
+ tcp_ses_list);
+ /*
+ * the demux thread can exit on its own while still in CifsNew
+ * so don't accept any sockets in that state. Since the
+ * tcpStatus never changes back to CifsNew it's safe to check
+ * for this without a lock.
+ */
+ if (server->tcpStatus == CifsNew)
+ continue;
- read_lock(&GlobalSMBSeslock);
- list_for_each(tmp, &GlobalSMBSessionList) {
- ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
- if (!ses->server)
+ if (addr->sa_family == AF_INET &&
+ (addr4->sin_addr.s_addr !=
+ server->addr.sockAddr.sin_addr.s_addr))
+ continue;
+ else if (addr->sa_family == AF_INET6 &&
+ memcmp(&server->addr.sockAddr6.sin6_addr,
+ &addr6->sin6_addr, sizeof(addr6->sin6_addr)))
continue;
- if (target_ip_addr &&
- ses->server->addr.sockAddr.sin_addr.s_addr != target_ip_addr->s_addr)
- continue;
- else if (target_ip6_addr &&
- memcmp(&ses->server->addr.sockAddr6.sin6_addr,
- target_ip6_addr, sizeof(*target_ip6_addr)))
- continue;
- /* BB lock server and tcp session; increment use count here?? */
+ ++server->srv_count;
+ write_unlock(&cifs_tcp_ses_lock);
+ cFYI(1, ("Existing tcp session with server found"));
+ return server;
+ }
+ write_unlock(&cifs_tcp_ses_lock);
+ return NULL;
+}
- /* found a match on the TCP session */
- *psrvTcp = ses->server;
+static void
+cifs_put_tcp_session(struct TCP_Server_Info *server)
+{
+ struct task_struct *task;
- /* BB check if reconnection needed */
- if (strncmp(ses->userName, userName, MAX_USERNAME_SIZE) == 0) {
- read_unlock(&GlobalSMBSeslock);
- /* Found exact match on both TCP and
- SMB sessions */
- return ses;
- }
- /* else tcp and smb sessions need reconnection */
+ write_lock(&cifs_tcp_ses_lock);
+ if (--server->srv_count > 0) {
+ write_unlock(&cifs_tcp_ses_lock);
+ return;
}
- read_unlock(&GlobalSMBSeslock);
- return NULL;
+ list_del_init(&server->tcp_ses_list);
+ write_unlock(&cifs_tcp_ses_lock);
+
+ spin_lock(&GlobalMid_Lock);
+ server->tcpStatus = CifsExiting;
+ spin_unlock(&GlobalMid_Lock);
+
+ task = xchg(&server->tsk, NULL);
+ if (task)
+ force_sig(SIGKILL, task);
}
-static struct cifsTconInfo *
-find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
+static struct cifsSesInfo *
+cifs_find_smb_ses(struct TCP_Server_Info *server, char *username)
{
struct list_head *tmp;
- struct cifsTconInfo *tcon;
- __be32 old_ip;
-
- read_lock(&GlobalSMBSeslock);
+ struct cifsSesInfo *ses;
- list_for_each(tmp, &GlobalTreeConnectionList) {
- cFYI(1, ("Next tcon"));
- tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
- if (!tcon->ses || !tcon->ses->server)
+ write_lock(&cifs_tcp_ses_lock);
+ list_for_each(tmp, &server->smb_ses_list) {
+ ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
+ if (strncmp(ses->userName, username, MAX_USERNAME_SIZE))
continue;
- old_ip = tcon->ses->server->addr.sockAddr.sin_addr.s_addr;
- cFYI(1, ("old ip addr: %x == new ip %x ?",
- old_ip, new_target_ip_addr));
+ ++ses->ses_count;
+ write_unlock(&cifs_tcp_ses_lock);
+ return ses;
+ }
+ write_unlock(&cifs_tcp_ses_lock);
+ return NULL;
+}
- if (old_ip != new_target_ip_addr)
- continue;
+static void
+cifs_put_smb_ses(struct cifsSesInfo *ses)
+{
+ int xid;
+ struct TCP_Server_Info *server = ses->server;
- /* BB lock tcon, server, tcp session and increment use count? */
- /* found a match on the TCP session */
- /* BB check if reconnection needed */
- cFYI(1, ("IP match, old UNC: %s new: %s",
- tcon->treeName, uncName));
+ write_lock(&cifs_tcp_ses_lock);
+ if (--ses->ses_count > 0) {
+ write_unlock(&cifs_tcp_ses_lock);
+ return;
+ }
- if (strncmp(tcon->treeName, uncName, MAX_TREE_SIZE))
- continue;
+ list_del_init(&ses->smb_ses_list);
+ write_unlock(&cifs_tcp_ses_lock);
- cFYI(1, ("and old usr: %s new: %s",
- tcon->treeName, uncName));
+ if (ses->status == CifsGood) {
+ xid = GetXid();
+ CIFSSMBLogoff(xid, ses);
+ _FreeXid(xid);
+ }
+ sesInfoFree(ses);
+ cifs_put_tcp_session(server);
+}
- if (strncmp(tcon->ses->userName, userName, MAX_USERNAME_SIZE))
+static struct cifsTconInfo *
+cifs_find_tcon(struct cifsSesInfo *ses, const char *unc)
+{
+ struct list_head *tmp;
+ struct cifsTconInfo *tcon;
+
+ write_lock(&cifs_tcp_ses_lock);
+ list_for_each(tmp, &ses->tcon_list) {
+ tcon = list_entry(tmp, struct cifsTconInfo, tcon_list);
+ if (tcon->tidStatus == CifsExiting)
+ continue;
+ if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
continue;
- /* matched smb session (user name) */
- read_unlock(&GlobalSMBSeslock);
+ ++tcon->tc_count;
+ write_unlock(&cifs_tcp_ses_lock);
return tcon;
}
-
- read_unlock(&GlobalSMBSeslock);
+ write_unlock(&cifs_tcp_ses_lock);
return NULL;
}
+static void
+cifs_put_tcon(struct cifsTconInfo *tcon)
+{
+ int xid;
+ struct cifsSesInfo *ses = tcon->ses;
+
+ write_lock(&cifs_tcp_ses_lock);
+ if (--tcon->tc_count > 0) {
+ write_unlock(&cifs_tcp_ses_lock);
+ return;
+ }
+
+ list_del_init(&tcon->tcon_list);
+ write_unlock(&cifs_tcp_ses_lock);
+
+ xid = GetXid();
+ CIFSSMBTDis(xid, tcon);
+ _FreeXid(xid);
+
+ DeleteTconOplockQEntries(tcon);
+ tconInfoFree(tcon);
+ cifs_put_smb_ses(ses);
+}
+
int
get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
@@ -1876,14 +1943,90 @@ convert_delimiter(char *path, char delim)
}
}
-static void
-kill_cifsd(struct TCP_Server_Info *server)
+static void setup_cifs_sb(struct smb_vol *pvolume_info,
+ struct cifs_sb_info *cifs_sb)
{
- struct task_struct *task;
-
- task = xchg(&server->tsk, NULL);
- if (task)
- force_sig(SIGKILL, task);
+ if (pvolume_info->rsize > CIFSMaxBufSize) {
+ cERROR(1, ("rsize %d too large, using MaxBufSize",
+ pvolume_info->rsize));
+ cifs_sb->rsize = CIFSMaxBufSize;
+ } else if ((pvolume_info->rsize) &&
+ (pvolume_info->rsize <= CIFSMaxBufSize))
+ cifs_sb->rsize = pvolume_info->rsize;
+ else /* default */
+ cifs_sb->rsize = CIFSMaxBufSize;
+
+ if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
+ cERROR(1, ("wsize %d too large, using 4096 instead",
+ pvolume_info->wsize));
+ cifs_sb->wsize = 4096;
+ } else if (pvolume_info->wsize)
+ cifs_sb->wsize = pvolume_info->wsize;
+ else
+ cifs_sb->wsize = min_t(const int,
+ PAGEVEC_SIZE * PAGE_CACHE_SIZE,
+ 127*1024);
+ /* old default of CIFSMaxBufSize was too small now
+ that SMB Write2 can send multiple pages in kvec.
+ RFC1001 does not describe what happens when frame
+ bigger than 128K is sent so use that as max in
+ conjunction with 52K kvec constraint on arch with 4K
+ page size */
+
+ if (cifs_sb->rsize < 2048) {
+ cifs_sb->rsize = 2048;
+ /* Windows ME may prefer this */
+ cFYI(1, ("readsize set to minimum: 2048"));
+ }
+ /* calculate prepath */
+ cifs_sb->prepath = pvolume_info->prepath;
+ if (cifs_sb->prepath) {
+ cifs_sb->prepathlen = strlen(cifs_sb->prepath);
+ /* we can not convert the / to \ in the path
+ separators in the prefixpath yet because we do not
+ know (until reset_cifs_unix_caps is called later)
+ whether POSIX PATH CAP is available. We normalize
+ the / to \ after reset_cifs_unix_caps is called */
+ pvolume_info->prepath = NULL;
+ } else
+ cifs_sb->prepathlen = 0;
+ cifs_sb->mnt_uid = pvolume_info->linux_uid;
+ cifs_sb->mnt_gid = pvolume_info->linux_gid;
+ cifs_sb->mnt_file_mode = pvolume_info->file_mode;
+ cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
+ cFYI(1, ("file mode: 0x%x dir mode: 0x%x",
+ cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
+
+ if (pvolume_info->noperm)
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
+ if (pvolume_info->setuids)
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
+ if (pvolume_info->server_ino)
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
+ if (pvolume_info->remap)
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
+ if (pvolume_info->no_xattr)
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
+ if (pvolume_info->sfu_emul)
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
+ if (pvolume_info->nobrl)
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
+ if (pvolume_info->cifs_acl)
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
+ if (pvolume_info->override_uid)
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
+ if (pvolume_info->override_gid)
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
+ if (pvolume_info->dynperm)
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
+ if (pvolume_info->direct_io) {
+ cFYI(1, ("mounting share using direct i/o"));
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
+ }
+
+ if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
+ cERROR(1, ("mount option dynperm ignored if cifsacl "
+ "mount option supported"));
}
int
@@ -1892,13 +2035,12 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
{
int rc = 0;
int xid;
- int address_type = AF_INET;
struct socket *csocket = NULL;
- struct sockaddr_in sin_server;
- struct sockaddr_in6 sin_server6;
+ struct sockaddr addr;
+ struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
+ struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
struct smb_vol volume_info;
struct cifsSesInfo *pSesInfo = NULL;
- struct cifsSesInfo *existingCifsSes = NULL;
struct cifsTconInfo *tcon = NULL;
struct TCP_Server_Info *srvTcp = NULL;
@@ -1906,6 +2048,7 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
/* cFYI(1, ("Entering cifs_mount. Xid: %d with: %s", xid, mount_data)); */
+ memset(&addr, 0, sizeof(struct sockaddr));
memset(&volume_info, 0, sizeof(struct smb_vol));
if (cifs_parse_mount_options(mount_data, devname, &volume_info)) {
rc = -EINVAL;
@@ -1928,16 +2071,16 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
if (volume_info.UNCip && volume_info.UNC) {
rc = cifs_inet_pton(AF_INET, volume_info.UNCip,
- &sin_server.sin_addr.s_addr);
+ &sin_server->sin_addr.s_addr);
if (rc <= 0) {
/* not ipv4 address, try ipv6 */
rc = cifs_inet_pton(AF_INET6, volume_info.UNCip,
- &sin_server6.sin6_addr.in6_u);
+ &sin_server6->sin6_addr.in6_u);
if (rc > 0)
- address_type = AF_INET6;
+ addr.sa_family = AF_INET6;
} else {
- address_type = AF_INET;
+ addr.sa_family = AF_INET;
}
if (rc <= 0) {
@@ -1977,41 +2120,25 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
}
}
- if (address_type == AF_INET)
- existingCifsSes = cifs_find_tcp_session(&sin_server.sin_addr,
- NULL /* no ipv6 addr */,
- volume_info.username, &srvTcp);
- else if (address_type == AF_INET6) {
- cFYI(1, ("looking for ipv6 address"));
- existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
- &sin_server6.sin6_addr,
- volume_info.username, &srvTcp);
- } else {
- rc = -EINVAL;
- goto out;
- }
-
- if (srvTcp) {
- cFYI(1, ("Existing tcp session with server found"));
- } else { /* create socket */
- if (volume_info.port)
- sin_server.sin_port = htons(volume_info.port);
- else
- sin_server.sin_port = 0;
- if (address_type == AF_INET6) {
+ srvTcp = cifs_find_tcp_session(&addr);
+ if (!srvTcp) { /* create socket */
+ if (addr.sa_family == AF_INET6) {
cFYI(1, ("attempting ipv6 connect"));
/* BB should we allow ipv6 on port 139? */
/* other OS never observed in Wild doing 139 with v6 */
- rc = ipv6_connect(&sin_server6, &csocket,
+ sin_server6->sin6_port = htons(volume_info.port);
+ rc = ipv6_connect(sin_server6, &csocket,
volume_info.noblocksnd);
- } else
- rc = ipv4_connect(&sin_server, &csocket,
+ } else {
+ sin_server->sin_port = htons(volume_info.port);
+ rc = ipv4_connect(sin_server, &csocket,
volume_info.source_rfc1001_name,
volume_info.target_rfc1001_name,
volume_info.noblocksnd,
volume_info.noautotune);
+ }
if (rc < 0) {
- cERROR(1, ("Error connecting to IPv4 socket. "
+ cERROR(1, ("Error connecting to socket. "
"Aborting operation"));
if (csocket != NULL)
sock_release(csocket);
@@ -2026,12 +2153,15 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
} else {
srvTcp->noblocksnd = volume_info.noblocksnd;
srvTcp->noautotune = volume_info.noautotune;
- memcpy(&srvTcp->addr.sockAddr, &sin_server,
- sizeof(struct sockaddr_in));
+ if (addr.sa_family == AF_INET6)
+ memcpy(&srvTcp->addr.sockAddr6, sin_server6,
+ sizeof(struct sockaddr_in6));
+ else
+ memcpy(&srvTcp->addr.sockAddr, sin_server,
+ sizeof(struct sockaddr_in));
atomic_set(&srvTcp->inFlight, 0);
/* BB Add code for ipv6 case too */
srvTcp->ssocket = csocket;
- srvTcp->protocolType = IPV4;
srvTcp->hostname = extract_hostname(volume_info.UNC);
if (IS_ERR(srvTcp->hostname)) {
rc = PTR_ERR(srvTcp->hostname);
@@ -2061,15 +2191,28 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
memcpy(srvTcp->server_RFC1001_name,
volume_info.target_rfc1001_name, 16);
srvTcp->sequence_number = 0;
+ INIT_LIST_HEAD(&srvTcp->tcp_ses_list);
+ INIT_LIST_HEAD(&srvTcp->smb_ses_list);
+ ++srvTcp->srv_count;
+ write_lock(&cifs_tcp_ses_lock);
+ list_add(&srvTcp->tcp_ses_list,
+ &cifs_tcp_ses_list);
+ write_unlock(&cifs_tcp_ses_lock);
}
}
- if (existingCifsSes) {
- pSesInfo = existingCifsSes;
+ pSesInfo = cifs_find_smb_ses(srvTcp, volume_info.username);
+ if (pSesInfo) {
cFYI(1, ("Existing smb sess found (status=%d)",
pSesInfo->status));
+ /*
+ * The existing SMB session already has a reference to srvTcp,
+ * so we can put back the extra one we got before
+ */
+ cifs_put_tcp_session(srvTcp);
+
down(&pSesInfo->sesSem);
- if (pSesInfo->status == CifsNeedReconnect) {
+ if (pSesInfo->need_reconnect) {
cFYI(1, ("Session needs reconnect"));
rc = cifs_setup_session(xid, pSesInfo,
cifs_sb->local_nls);
@@ -2078,187 +2221,101 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
} else if (!rc) {
cFYI(1, ("Existing smb sess not found"));
pSesInfo = sesInfoAlloc();
- if (pSesInfo == NULL)
+ if (pSesInfo == NULL) {
rc = -ENOMEM;
- else {
- pSesInfo->server = srvTcp;
- sprintf(pSesInfo->serverName, "%pI4",
- &sin_server.sin_addr.s_addr);
- }
+ goto mount_fail_check;
+ }
+
+ /* new SMB session uses our srvTcp ref */
+ pSesInfo->server = srvTcp;
+ sprintf(pSesInfo->serverName, "%pI4",
+ &sin_server->sin_addr.s_addr);
+
+ write_lock(&cifs_tcp_ses_lock);
+ list_add(&pSesInfo->smb_ses_list, &srvTcp->smb_ses_list);
+ write_unlock(&cifs_tcp_ses_lock);
+
+ /* volume_info.password freed at unmount */
+ if (volume_info.password) {
+ pSesInfo->password = volume_info.password;
+ /* set to NULL to prevent freeing on exit */
+ volume_info.password = NULL;
+ }
+ if (volume_info.username)
+ strncpy(pSesInfo->userName, volume_info.username,
+ MAX_USERNAME_SIZE);
+ if (volume_info.domainname) {
+ int len = strlen(volume_info.domainname);
+ pSesInfo->domainName = kmalloc(len + 1, GFP_KERNEL);
+ if (pSesInfo->domainName)
+ strcpy(pSesInfo->domainName,
+ volume_info.domainname);
+ }
+ pSesInfo->linux_uid = volume_info.linux_uid;
+ pSesInfo->overrideSecFlg = volume_info.secFlg;
+ down(&pSesInfo->sesSem);
- if (!rc) {
- /* volume_info.password freed at unmount */
- if (volume_info.password) {
- pSesInfo->password = volume_info.password;
- /* set to NULL to prevent freeing on exit */
- volume_info.password = NULL;
- }
- if (volume_info.username)
- strncpy(pSesInfo->userName,
- volume_info.username,
- MAX_USERNAME_SIZE);
- if (volume_info.domainname) {
- int len = strlen(volume_info.domainname);
- pSesInfo->domainName =
- kmalloc(len + 1, GFP_KERNEL);
- if (pSesInfo->domainName)
- strcpy(pSesInfo->domainName,
- volume_info.domainname);
- }
- pSesInfo->linux_uid = volume_info.linux_uid;
- pSesInfo->overrideSecFlg = volume_info.secFlg;
- down(&pSesInfo->sesSem);
- /* BB FIXME need to pass vol->secFlgs BB */
- rc = cifs_setup_session(xid, pSesInfo,
- cifs_sb->local_nls);
- up(&pSesInfo->sesSem);
- if (!rc)
- atomic_inc(&srvTcp->socketUseCount);
- }
+ /* BB FIXME need to pass vol->secFlgs BB */
+ rc = cifs_setup_session(xid, pSesInfo,
+ cifs_sb->local_nls);
+ up(&pSesInfo->sesSem);
}
/* search for existing tcon to this server share */
if (!rc) {
- if (volume_info.rsize > CIFSMaxBufSize) {
- cERROR(1, ("rsize %d too large, using MaxBufSize",
- volume_info.rsize));
- cifs_sb->rsize = CIFSMaxBufSize;
- } else if ((volume_info.rsize) &&
- (volume_info.rsize <= CIFSMaxBufSize))
- cifs_sb->rsize = volume_info.rsize;
- else /* default */
- cifs_sb->rsize = CIFSMaxBufSize;
-
- if (volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
- cERROR(1, ("wsize %d too large, using 4096 instead",
- volume_info.wsize));
- cifs_sb->wsize = 4096;
- } else if (volume_info.wsize)
- cifs_sb->wsize = volume_info.wsize;
- else
- cifs_sb->wsize =
- min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
- 127*1024);
- /* old default of CIFSMaxBufSize was too small now
- that SMB Write2 can send multiple pages in kvec.
- RFC1001 does not describe what happens when frame
- bigger than 128K is sent so use that as max in
- conjunction with 52K kvec constraint on arch with 4K
- page size */
-
- if (cifs_sb->rsize < 2048) {
- cifs_sb->rsize = 2048;
- /* Windows ME may prefer this */
- cFYI(1, ("readsize set to minimum: 2048"));
- }
- /* calculate prepath */
- cifs_sb->prepath = volume_info.prepath;
- if (cifs_sb->prepath) {
- cifs_sb->prepathlen = strlen(cifs_sb->prepath);
- /* we can not convert the / to \ in the path
- separators in the prefixpath yet because we do not
- know (until reset_cifs_unix_caps is called later)
- whether POSIX PATH CAP is available. We normalize
- the / to \ after reset_cifs_unix_caps is called */
- volume_info.prepath = NULL;
- } else
- cifs_sb->prepathlen = 0;
- cifs_sb->mnt_uid = volume_info.linux_uid;
- cifs_sb->mnt_gid = volume_info.linux_gid;
- cifs_sb->mnt_file_mode = volume_info.file_mode;
- cifs_sb->mnt_dir_mode = volume_info.dir_mode;
- cFYI(1, ("file mode: 0x%x dir mode: 0x%x",
- cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
-
- if (volume_info.noperm)
- cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
- if (volume_info.setuids)
- cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
- if (volume_info.server_ino)
- cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
- if (volume_info.remap)
- cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
- if (volume_info.no_xattr)
- cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
- if (volume_info.sfu_emul)
- cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
- if (volume_info.nobrl)
- cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
- if (volume_info.cifs_acl)
- cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
- if (volume_info.override_uid)
- cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
- if (volume_info.override_gid)
- cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
- if (volume_info.dynperm)
- cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
- if (volume_info.direct_io) {
- cFYI(1, ("mounting share using direct i/o"));
- cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
- }
+ setup_cifs_sb(&volume_info, cifs_sb);
- if ((volume_info.cifs_acl) && (volume_info.dynperm))
- cERROR(1, ("mount option dynperm ignored if cifsacl "
- "mount option supported"));
-
- tcon =
- find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
- volume_info.username);
+ tcon = cifs_find_tcon(pSesInfo, volume_info.UNC);
if (tcon) {
cFYI(1, ("Found match on UNC path"));
- /* we can have only one retry value for a connection
- to a share so for resources mounted more than once
- to the same server share the last value passed in
- for the retry flag is used */
- tcon->retry = volume_info.retry;
- tcon->nocase = volume_info.nocase;
- tcon->local_lease = volume_info.local_lease;
+ /* existing tcon already has a reference */
+ cifs_put_smb_ses(pSesInfo);
if (tcon->seal != volume_info.seal)
cERROR(1, ("transport encryption setting "
"conflicts with existing tid"));
} else {
tcon = tconInfoAlloc();
- if (tcon == NULL)
+ if (tcon == NULL) {
rc = -ENOMEM;
- else {
- /* check for null share name ie connecting to
- * dfs root */
-
- /* BB check if this works for exactly length
- * three strings */
- if ((strchr(volume_info.UNC + 3, '\\') == NULL)
- && (strchr(volume_info.UNC + 3, '/') ==
- NULL)) {
-/* rc = connect_to_dfs_path(xid, pSesInfo,
- "", cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);*/
- cFYI(1, ("DFS root not supported"));
- rc = -ENODEV;
- goto out;
- } else {
- /* BB Do we need to wrap sesSem around
- * this TCon call and Unix SetFS as
- * we do on SessSetup and reconnect? */
- rc = CIFSTCon(xid, pSesInfo,
- volume_info.UNC,
- tcon, cifs_sb->local_nls);
- cFYI(1, ("CIFS Tcon rc = %d", rc));
- if (volume_info.nodfs) {
- tcon->Flags &=
- ~SMB_SHARE_IS_IN_DFS;
- cFYI(1, ("DFS disabled (%d)",
- tcon->Flags));
- }
- }
- if (!rc) {
- atomic_inc(&pSesInfo->inUse);
- tcon->retry = volume_info.retry;
- tcon->nocase = volume_info.nocase;
- tcon->seal = volume_info.seal;
+ goto mount_fail_check;
+ }
+ tcon->ses = pSesInfo;
+
+ /* check for null share name ie connect to dfs root */
+ if ((strchr(volume_info.UNC + 3, '\\') == NULL)
+ && (strchr(volume_info.UNC + 3, '/') == NULL)) {
+ /* rc = connect_to_dfs_path(...) */
+ cFYI(1, ("DFS root not supported"));
+ rc = -ENODEV;
+ goto mount_fail_check;
+ } else {
+ /* BB Do we need to wrap sesSem around
+ * this TCon call and Unix SetFS as
+ * we do on SessSetup and reconnect? */
+ rc = CIFSTCon(xid, pSesInfo, volume_info.UNC,
+ tcon, cifs_sb->local_nls);
+ cFYI(1, ("CIFS Tcon rc = %d", rc));
+ if (volume_info.nodfs) {
+ tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
+ cFYI(1, ("DFS disabled (%d)",
+ tcon->Flags));
}
}
- }
+ if (rc)
+ goto mount_fail_check;
+ tcon->seal = volume_info.seal;
+ write_lock(&cifs_tcp_ses_lock);
+ list_add(&tcon->tcon_list, &pSesInfo->tcon_list);
+ write_unlock(&cifs_tcp_ses_lock);
+ }
+
+ /* we can have only one retry value for a connection
+ to a share so for resources mounted more than once
+ to the same server share the last value passed in
+ for the retry flag is used */
+ tcon->retry = volume_info.retry;
+ tcon->nocase = volume_info.nocase;
+ tcon->local_lease = volume_info.local_lease;
}
if (pSesInfo) {
if (pSesInfo->capabilities & CAP_LARGE_FILES) {
@@ -2270,80 +2327,49 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
/* BB FIXME fix time_gran to be larger for LANMAN sessions */
sb->s_time_gran = 100;
-/* on error free sesinfo and tcon struct if needed */
+mount_fail_check:
+ /* on error free sesinfo and tcon struct if needed */
if (rc) {
- /* if session setup failed, use count is zero but
- we still need to free cifsd thread */
- if (atomic_read(&srvTcp->socketUseCount) == 0) {
- spin_lock(&GlobalMid_Lock);
- srvTcp->tcpStatus = CifsExiting;
- spin_unlock(&GlobalMid_Lock);
- kill_cifsd(srvTcp);
- }
- /* If find_unc succeeded then rc == 0 so we can not end */
- if (tcon) /* up accidently freeing someone elses tcon struct */
- tconInfoFree(tcon);
- if (existingCifsSes == NULL) {
- if (pSesInfo) {
- if ((pSesInfo->server) &&
- (pSesInfo->status == CifsGood)) {
- int temp_rc;
- temp_rc = CIFSSMBLogoff(xid, pSesInfo);
- /* if the socketUseCount is now zero */
- if ((temp_rc == -ESHUTDOWN) &&
- (pSesInfo->server))
- kill_cifsd(pSesInfo->server);
- } else {
- cFYI(1, ("No session or bad tcon"));
- if (pSesInfo->server) {
- spin_lock(&GlobalMid_Lock);
- srvTcp->tcpStatus = CifsExiting;
- spin_unlock(&GlobalMid_Lock);
- kill_cifsd(pSesInfo->server);
- }
- }
- sesInfoFree(pSesInfo);
- /* pSesInfo = NULL; */
- }
- }
- } else {
- atomic_inc(&tcon->useCount);
- cifs_sb->tcon = tcon;
- tcon->ses = pSesInfo;
-
- /* do not care if following two calls succeed - informational */
- if (!tcon->ipc) {
- CIFSSMBQFSDeviceInfo(xid, tcon);
- CIFSSMBQFSAttributeInfo(xid, tcon);
- }
-
- /* tell server which Unix caps we support */
- if (tcon->ses->capabilities & CAP_UNIX)
- /* reset of caps checks mount to see if unix extensions
- disabled for just this mount */
- reset_cifs_unix_caps(xid, tcon, sb, &volume_info);
+ /* If find_unc succeeded then rc == 0 so we can not end */
+ /* up accidently freeing someone elses tcon struct */
+ if (tcon)
+ cifs_put_tcon(tcon);
+ else if (pSesInfo)
+ cifs_put_smb_ses(pSesInfo);
else
- tcon->unix_ext = 0; /* server does not support them */
+ cifs_put_tcp_session(srvTcp);
+ goto out;
+ }
+ cifs_sb->tcon = tcon;
- /* convert forward to back slashes in prepath here if needed */
- if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
- convert_delimiter(cifs_sb->prepath,
- CIFS_DIR_SEP(cifs_sb));
+ /* do not care if following two calls succeed - informational */
+ if (!tcon->ipc) {
+ CIFSSMBQFSDeviceInfo(xid, tcon);
+ CIFSSMBQFSAttributeInfo(xid, tcon);
+ }
- if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
- cifs_sb->rsize = 1024 * 127;
- cFYI(DBG2,
- ("no very large read support, rsize now 127K"));
- }
- if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
- cifs_sb->wsize = min(cifs_sb->wsize,
- (tcon->ses->server->maxBuf -
- MAX_CIFS_HDR_SIZE));
- if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
- cifs_sb->rsize = min(cifs_sb->rsize,
- (tcon->ses->server->maxBuf -
- MAX_CIFS_HDR_SIZE));
+ /* tell server which Unix caps we support */
+ if (tcon->ses->capabilities & CAP_UNIX)
+ /* reset of caps checks mount to see if unix extensions
+ disabled for just this mount */
+ reset_cifs_unix_caps(xid, tcon, sb, &volume_info);
+ else
+ tcon->unix_ext = 0; /* server does not support them */
+
+ /* convert forward to back slashes in prepath here if needed */
+ if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
+ convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb));
+
+ if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
+ cifs_sb->rsize = 1024 * 127;
+ cFYI(DBG2, ("no very large read support, rsize now 127K"));
}
+ if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
+ cifs_sb->wsize = min(cifs_sb->wsize,
+ (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
+ if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
+ cifs_sb->rsize = min(cifs_sb->rsize,
+ (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
/* volume_info.password is freed above when existing session found
(in which case it is not needed anymore) but when new sesion is created
@@ -3513,6 +3539,7 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
/* above now done in SendReceive */
if ((rc == 0) && (tcon != NULL)) {
tcon->tidStatus = CifsGood;
+ tcon->need_reconnect = false;
tcon->tid = smb_buffer_response->Tid;
bcc_ptr = pByteArea(smb_buffer_response);
length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
@@ -3584,48 +3611,17 @@ int
cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
{
int rc = 0;
- int xid;
- struct cifsSesInfo *ses = NULL;
char *tmp;
- xid = GetXid();
-
- if (cifs_sb->tcon) {
- ses = cifs_sb->tcon->ses; /* save ptr to ses before delete tcon!*/
- rc = CIFSSMBTDis(xid, cifs_sb->tcon);
- if (rc == -EBUSY) {
- FreeXid(xid);
- return 0;
- }
- DeleteTconOplockQEntries(cifs_sb->tcon);
- tconInfoFree(cifs_sb->tcon);
- if ((ses) && (ses->server)) {
- /* save off task so we do not refer to ses later */
- cFYI(1, ("About to do SMBLogoff "));
- rc = CIFSSMBLogoff(xid, ses);
- if (rc == -EBUSY) {
- FreeXid(xid);
- return 0;
- } else if (rc == -ESHUTDOWN) {
- cFYI(1, ("Waking up socket by sending signal"));
- if (ses->server)
- kill_cifsd(ses->server);
- rc = 0;
- } /* else - we have an smb session
- left on this socket do not kill cifsd */
- } else
- cFYI(1, ("No session or bad tcon"));
- }
+ if (cifs_sb->tcon)
+ cifs_put_tcon(cifs_sb->tcon);
cifs_sb->tcon = NULL;
tmp = cifs_sb->prepath;
cifs_sb->prepathlen = 0;
cifs_sb->prepath = NULL;
kfree(tmp);
- if (ses)
- sesInfoFree(ses);
- FreeXid(xid);
return rc;
}
@@ -3741,6 +3737,7 @@ int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
cFYI(1, ("CIFS Session Established successfully"));
spin_lock(&GlobalMid_Lock);
pSesInfo->status = CifsGood;
+ pSesInfo->need_reconnect = false;
spin_unlock(&GlobalMid_Lock);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-25 02:13:34 +0000