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Diffstat (limited to 'fs/cifs/connect.c')
-rw-r--r--fs/cifs/connect.c82
1 files changed, 71 insertions, 11 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index f7563c88c917..b822bf364c2b 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -53,6 +53,9 @@
#include "nterr.h"
#include "rfc1002pdu.h"
#include "fscache.h"
+#ifdef CONFIG_CIFS_SMB2
+#include "smb2proto.h"
+#endif
#define CIFS_PORT 445
#define RFC1001_PORT 139
@@ -89,6 +92,7 @@ enum {
Opt_multiuser, Opt_sloppy, Opt_nosharesock,
Opt_persistent, Opt_nopersistent,
Opt_resilient, Opt_noresilient,
+ Opt_domainauto,
/* Mount options which take numeric value */
Opt_backupuid, Opt_backupgid, Opt_uid,
@@ -96,6 +100,7 @@ enum {
Opt_dirmode, Opt_port,
Opt_rsize, Opt_wsize, Opt_actimeo,
Opt_echo_interval, Opt_max_credits,
+ Opt_snapshot,
/* Mount options which take string value */
Opt_user, Opt_pass, Opt_ip,
@@ -177,6 +182,7 @@ static const match_table_t cifs_mount_option_tokens = {
{ Opt_nopersistent, "nopersistenthandles"},
{ Opt_resilient, "resilienthandles"},
{ Opt_noresilient, "noresilienthandles"},
+ { Opt_domainauto, "domainauto"},
{ Opt_backupuid, "backupuid=%s" },
{ Opt_backupgid, "backupgid=%s" },
@@ -192,6 +198,7 @@ static const match_table_t cifs_mount_option_tokens = {
{ Opt_actimeo, "actimeo=%s" },
{ Opt_echo_interval, "echo_interval=%s" },
{ Opt_max_credits, "max_credits=%s" },
+ { Opt_snapshot, "snapshot=%s" },
{ Opt_blank_user, "user=" },
{ Opt_blank_user, "username=" },
@@ -1500,6 +1507,9 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
case Opt_noresilient:
vol->resilient = false; /* already the default */
break;
+ case Opt_domainauto:
+ vol->domainauto = true;
+ break;
/* Numeric Values */
case Opt_backupuid:
@@ -1602,6 +1612,14 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
}
vol->echo_interval = option;
break;
+ case Opt_snapshot:
+ if (get_option_ul(args, &option)) {
+ cifs_dbg(VFS, "%s: Invalid snapshot time\n",
+ __func__);
+ goto cifs_parse_mount_err;
+ }
+ vol->snapshot_time = option;
+ break;
case Opt_max_credits:
if (get_option_ul(args, &option) || (option < 20) ||
(option > 60000)) {
@@ -2101,8 +2119,8 @@ cifs_find_tcp_session(struct smb_vol *vol)
return NULL;
}
-static void
-cifs_put_tcp_session(struct TCP_Server_Info *server)
+void
+cifs_put_tcp_session(struct TCP_Server_Info *server, int from_reconnect)
{
struct task_struct *task;
@@ -2119,6 +2137,19 @@ cifs_put_tcp_session(struct TCP_Server_Info *server)
cancel_delayed_work_sync(&server->echo);
+#ifdef CONFIG_CIFS_SMB2
+ if (from_reconnect)
+ /*
+ * Avoid deadlock here: reconnect work calls
+ * cifs_put_tcp_session() at its end. Need to be sure
+ * that reconnect work does nothing with server pointer after
+ * that step.
+ */
+ cancel_delayed_work(&server->reconnect);
+ else
+ cancel_delayed_work_sync(&server->reconnect);
+#endif
+
spin_lock(&GlobalMid_Lock);
server->tcpStatus = CifsExiting;
spin_unlock(&GlobalMid_Lock);
@@ -2183,6 +2214,10 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
+#ifdef CONFIG_CIFS_SMB2
+ INIT_DELAYED_WORK(&tcp_ses->reconnect, smb2_reconnect_server);
+ mutex_init(&tcp_ses->reconnect_mutex);
+#endif
memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
sizeof(tcp_ses->srcaddr));
memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
@@ -2341,7 +2376,7 @@ cifs_put_smb_ses(struct cifs_ses *ses)
spin_unlock(&cifs_tcp_ses_lock);
sesInfoFree(ses);
- cifs_put_tcp_session(server);
+ cifs_put_tcp_session(server, 0);
}
#ifdef CONFIG_KEYS
@@ -2515,7 +2550,7 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
mutex_unlock(&ses->session_mutex);
/* existing SMB ses has a server reference already */
- cifs_put_tcp_session(server);
+ cifs_put_tcp_session(server, 0);
free_xid(xid);
return ses;
}
@@ -2549,6 +2584,8 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
if (!ses->domainName)
goto get_ses_fail;
}
+ if (volume_info->domainauto)
+ ses->domainAuto = volume_info->domainauto;
ses->cred_uid = volume_info->cred_uid;
ses->linux_uid = volume_info->linux_uid;
@@ -2587,7 +2624,7 @@ static int match_tcon(struct cifs_tcon *tcon, const char *unc)
}
static struct cifs_tcon *
-cifs_find_tcon(struct cifs_ses *ses, const char *unc)
+cifs_find_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
{
struct list_head *tmp;
struct cifs_tcon *tcon;
@@ -2595,8 +2632,14 @@ cifs_find_tcon(struct cifs_ses *ses, const char *unc)
spin_lock(&cifs_tcp_ses_lock);
list_for_each(tmp, &ses->tcon_list) {
tcon = list_entry(tmp, struct cifs_tcon, tcon_list);
- if (!match_tcon(tcon, unc))
+ if (!match_tcon(tcon, volume_info->UNC))
continue;
+
+#ifdef CONFIG_CIFS_SMB2
+ if (tcon->snapshot_time != volume_info->snapshot_time)
+ continue;
+#endif /* CONFIG_CIFS_SMB2 */
+
++tcon->tc_count;
spin_unlock(&cifs_tcp_ses_lock);
return tcon;
@@ -2605,7 +2648,7 @@ cifs_find_tcon(struct cifs_ses *ses, const char *unc)
return NULL;
}
-static void
+void
cifs_put_tcon(struct cifs_tcon *tcon)
{
unsigned int xid;
@@ -2637,7 +2680,7 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
int rc, xid;
struct cifs_tcon *tcon;
- tcon = cifs_find_tcon(ses, volume_info->UNC);
+ tcon = cifs_find_tcon(ses, volume_info);
if (tcon) {
cifs_dbg(FYI, "Found match on UNC path\n");
/* existing tcon already has a reference */
@@ -2658,6 +2701,22 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
goto out_fail;
}
+ if (volume_info->snapshot_time) {
+#ifdef CONFIG_CIFS_SMB2
+ if (ses->server->vals->protocol_id == 0) {
+ cifs_dbg(VFS,
+ "Use SMB2 or later for snapshot mount option\n");
+ rc = -EOPNOTSUPP;
+ goto out_fail;
+ } else
+ tcon->snapshot_time = volume_info->snapshot_time;
+#else
+ cifs_dbg(VFS, "Snapshot mount option requires SMB2 support\n");
+ rc = -EOPNOTSUPP;
+ goto out_fail;
+#endif /* CONFIG_CIFS_SMB2 */
+ }
+
tcon->ses = ses;
if (volume_info->password) {
tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
@@ -3707,7 +3766,8 @@ remote_path_check:
/*
* cifs_build_path_to_root works only when we have a valid tcon
*/
- full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon);
+ full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon,
+ tcon->Flags & SMB_SHARE_IS_IN_DFS);
if (full_path == NULL) {
rc = -ENOMEM;
goto mount_fail_check;
@@ -3793,7 +3853,7 @@ mount_fail_check:
else if (ses)
cifs_put_smb_ses(ses);
else
- cifs_put_tcp_session(server);
+ cifs_put_tcp_session(server, 0);
bdi_destroy(&cifs_sb->bdi);
}
@@ -4104,7 +4164,7 @@ cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid)
ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info);
if (IS_ERR(ses)) {
tcon = (struct cifs_tcon *)ses;
- cifs_put_tcp_session(master_tcon->ses->server);
+ cifs_put_tcp_session(master_tcon->ses->server, 0);
goto out;
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-28 07:50:14 +0300