diff options
Diffstat (limited to 'kernel/fs/cifs/cifsglob.h')
| -rw-r--r-- | kernel/fs/cifs/cifsglob.h | 37 |
1 files changed, 20 insertions, 17 deletions
diff --git a/kernel/fs/cifs/cifsglob.h b/kernel/fs/cifs/cifsglob.h index 2b510c537..b76883606 100644 --- a/kernel/fs/cifs/cifsglob.h +++ b/kernel/fs/cifs/cifsglob.h @@ -627,6 +627,8 @@ struct TCP_Server_Info { #ifdef CONFIG_CIFS_SMB2 unsigned int max_read; unsigned int max_write; + struct delayed_work reconnect; /* reconnect workqueue job */ + struct mutex reconnect_mutex; /* prevent simultaneous reconnects */ #endif /* CONFIG_CIFS_SMB2 */ }; @@ -826,7 +828,9 @@ cap_unix(struct cifs_ses *ses) struct cifs_tcon { struct list_head tcon_list; int tc_count; + struct list_head rlist; /* reconnect list */ struct list_head openFileList; + spinlock_t open_file_lock; /* protects list above */ struct cifs_ses *ses; /* pointer to session associated with */ char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */ char *nativeFileSystem; @@ -883,7 +887,7 @@ struct cifs_tcon { #endif /* CONFIG_CIFS_STATS2 */ __u64 bytes_read; __u64 bytes_written; - spinlock_t stat_lock; + spinlock_t stat_lock; /* protects the two fields above */ #endif /* CONFIG_CIFS_STATS */ FILE_SYSTEM_DEVICE_INFO fsDevInfo; FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */ @@ -1034,8 +1038,10 @@ struct cifs_fid_locks { }; struct cifsFileInfo { + /* following two lists are protected by tcon->open_file_lock */ struct list_head tlist; /* pointer to next fid owned by tcon */ struct list_head flist; /* next fid (file instance) for this inode */ + /* lock list below protected by cifsi->lock_sem */ struct cifs_fid_locks *llist; /* brlocks held by this fid */ kuid_t uid; /* allows finding which FileInfo structure */ __u32 pid; /* process id who opened file */ @@ -1043,11 +1049,12 @@ struct cifsFileInfo { /* BB add lock scope info here if needed */ ; /* lock scope id (0 if none) */ struct dentry *dentry; - unsigned int f_flags; struct tcon_link *tlink; + unsigned int f_flags; bool invalidHandle:1; /* file closed via session abend */ bool oplock_break_cancelled:1; - int count; /* refcount protected by cifs_file_list_lock */ + int count; + spinlock_t file_info_lock; /* protects four flag/count fields above */ struct mutex fh_mutex; /* prevents reopen race after dead ses*/ struct cifs_search_info srch_inf; struct work_struct oplock_break; /* work for oplock breaks */ @@ -1114,7 +1121,7 @@ struct cifs_writedata { /* * Take a reference on the file private data. Must be called with - * cifs_file_list_lock held. + * cfile->file_info_lock held. */ static inline void cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file) @@ -1508,8 +1515,10 @@ require use of the stronger protocol */ * GlobalMid_Lock protects: * list operations on pending_mid_q and oplockQ * updates to XID counters, multiplex id and SMB sequence numbers - * cifs_file_list_lock protects: - * list operations on tcp and SMB session lists and tCon lists + * tcp_ses_lock protects: + * list operations on tcp and SMB session lists + * tcon->open_file_lock protects the list of open files hanging off the tcon + * cfile->file_info_lock protects counters and fields in cifs file struct * f_owner.lock protects certain per file struct operations * mapping->page_lock protects certain per page operations * @@ -1541,18 +1550,12 @@ GLOBAL_EXTERN struct list_head cifs_tcp_ses_list; * 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. + * generally the locks should be taken in order tcp_ses_lock before + * tcon->open_file_lock and that before file->file_info_lock since the + * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file */ GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock; -/* - * 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 spinlock_t cifs_file_list_lock; - #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */ /* Outstanding dir notify requests */ GLOBAL_EXTERN struct list_head GlobalDnotifyReqList; @@ -1588,11 +1591,11 @@ GLOBAL_EXTERN atomic_t midCount; /* Misc globals */ GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */ -GLOBAL_EXTERN unsigned int lookupCacheEnabled; +GLOBAL_EXTERN bool lookupCacheEnabled; GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent with more secure ntlmssp2 challenge/resp */ GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */ -GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ +GLOBAL_EXTERN bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */ GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */ GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */ |