[CIFS] Do not attempt to close invalidated file handles

[linux-2.6-omap-h63xx.git] / fs / cifs / cifsglob.h

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 0d22479d99b7c0de7a145b84ee1f246136fde8f8..c57c0565547fa99058e9a192796123a419309066 100644 (file)
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -85,8 +85,7 @@ enum securityEnum {
 };
 
 enum protocolEnum {
-       IPV4 = 0,
-       IPV6,
+       TCP = 0,
        SCTP
        /* Netbios frames protocol not supported at this time */
 };
@@ -122,6 +121,9 @@ struct cifs_cred {
  */
 
 struct TCP_Server_Info {
+       struct list_head tcp_ses_list;
+       struct list_head smb_ses_list;
+       int srv_count; /* reference counter */
        /* 15 character server name + 0x20 16th byte indicating type = srv */
        char server_RFC1001_name[SERVER_NAME_LEN_WITH_NULL];
        char unicode_server_Name[SERVER_NAME_LEN_WITH_NULL * 2];
@@ -141,7 +143,8 @@ struct TCP_Server_Info {
        char versionMajor;
        char versionMinor;
        bool svlocal:1;                 /* local server or remote */
-       atomic_t socketUseCount; /* number of open cifs sessions on socket */
+       bool noblocksnd;                /* use blocking sendmsg */
+       bool noautotune;                /* do not autotune send buf sizes */
        atomic_t inFlight;  /* number of requests on the wire to server */
 #ifdef CONFIG_CIFS_STATS2
        atomic_t inSend; /* requests trying to send */
@@ -192,13 +195,14 @@ struct cifsUidInfo {
  * Session structure.  One of these for each uid session with a particular host
  */
 struct cifsSesInfo {
-       struct list_head cifsSessionList;
+       struct list_head smb_ses_list;
+       struct list_head tcon_list;
        struct semaphore sesSem;
 #if 0
        struct cifsUidInfo *uidInfo;    /* pointer to user info */
 #endif
        struct TCP_Server_Info *server; /* pointer to server info */
-       atomic_t inUse; /* # of mounts (tree connections) on this ses */
+       int ses_count;          /* reference counter */
        enum statusEnum status;
        unsigned overrideSecFlg;  /* if non-zero override global sec flags */
        __u16 ipc_tid;          /* special tid for connection to IPC share */
@@ -214,6 +218,7 @@ struct cifsSesInfo {
        char userName[MAX_USERNAME_SIZE + 1];
        char *domainName;
        char *password;
+       bool need_reconnect:1; /* connection reset, uid now invalid */
 };
 /* no more than one of the following three session flags may be set */
 #define CIFS_SES_NT4 1
@@ -228,16 +233,15 @@ struct cifsSesInfo {
  * session
  */
 struct cifsTconInfo {
-       struct list_head cifsConnectionList;
+       struct list_head tcon_list;
+       int tc_count;
        struct list_head openFileList;
-       struct semaphore tconSem;
        struct cifsSesInfo *ses;        /* pointer to session associated with */
        char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
        char *nativeFileSystem;
        __u16 tid;              /* The 2 byte tree id */
        __u16 Flags;            /* optional support bits */
        enum statusEnum tidStatus;
-       atomic_t useCount;      /* how many explicit/implicit mounts to share */
 #ifdef CONFIG_CIFS_STATS
        atomic_t num_smbs_sent;
        atomic_t num_writes;
@@ -285,6 +289,8 @@ struct cifsTconInfo {
        bool seal:1;      /* transport encryption for this mounted share */
        bool unix_ext:1;  /* if false disable Linux extensions to CIFS protocol
                                for this mount even if server would support */
+       bool local_lease:1; /* check leases (only) on local system not remote */
+       bool need_reconnect:1; /* connection reset, tid now invalid */
        /* BB add field for back pointer to sb struct(s)? */
 };
 
@@ -353,6 +359,7 @@ struct cifsInodeInfo {
        bool clientCanCacheRead:1;      /* read oplock */
        bool clientCanCacheAll:1;       /* read and writebehind oplock */
        bool oplockPending:1;
+       bool delete_pending:1;          /* DELETE_ON_CLOSE is set */
        struct inode vfs_inode;
 };
 
@@ -584,22 +591,30 @@ require use of the stronger protocol */
 #endif
 
 /*
- * The list of servers that did not respond with NT LM 0.12.
- * This list helps improve performance and eliminate the messages indicating
- * that we had a communications error talking to the server in this list.
+ * the list of TCP_Server_Info structures, ie each of the sockets
+ * connecting our client to a distinct server (ip address), is
+ * chained together by cifs_tcp_ses_list. The list of all our SMB
+ * sessions (and from that the tree connections) can be found
+ * by iterating over cifs_tcp_ses_list
  */
-/* Feature not supported */
-/* GLOBAL_EXTERN struct servers_not_supported *NotSuppList; */
+GLOBAL_EXTERN struct list_head         cifs_tcp_ses_list;
 
 /*
- * The following is a hash table of all the users we know about.
+ * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
+ * tcp session, and the list of tcon's per smb session. It also protects
+ * the reference counters for the server, smb session, and tcon. Finally,
+ * changes to the tcon->tidStatus should be done while holding this lock.
  */
-GLOBAL_EXTERN struct smbUidInfo *GlobalUidList[UID_HASH];
+GLOBAL_EXTERN rwlock_t         cifs_tcp_ses_lock;
 
-/* GLOBAL_EXTERN struct list_head GlobalServerList; BB not implemented yet */
-GLOBAL_EXTERN struct list_head GlobalSMBSessionList;
-GLOBAL_EXTERN struct list_head GlobalTreeConnectionList;
-GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;  /* protects list inserts on 3 above */
+/*
+ * This lock protects the cifs_file->llist and cifs_file->flist
+ * list operations, and updates to some flags (cifs_file->invalidHandle)
+ * It will be moved to either use the tcon->stat_lock or equivalent later.
+ * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
+ * the cifs_tcp_ses_lock must be grabbed first and released last.
+ */
+GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;
 
 GLOBAL_EXTERN struct list_head GlobalOplock_Q;