forked from mirrors/linux
a71113da44
smbfs keeps track of the user space server process in conn_pid. This converts that track to use a struct pid instead of pid_t. This keeps us safe from pid wrap around issues and prepares the way for the pid namespace. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
101 lines
2.2 KiB
C
101 lines
2.2 KiB
C
/*
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* smb_fs_sb.h
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*
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* Copyright (C) 1995 by Paal-Kr. Engstad and Volker Lendecke
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* Copyright (C) 1997 by Volker Lendecke
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*
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*/
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#ifndef _SMB_FS_SB
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#define _SMB_FS_SB
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#ifdef __KERNEL__
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#include <linux/types.h>
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#include <linux/smb.h>
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/*
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* Upper limit on the total number of active smb_request structs.
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*/
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#define MAX_REQUEST_HARD 256
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enum smb_receive_state {
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SMB_RECV_START, /* No data read, looking for length + sig */
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SMB_RECV_HEADER, /* Reading the header data */
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SMB_RECV_HCOMPLETE, /* Done with the header */
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SMB_RECV_PARAM, /* Reading parameter words */
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SMB_RECV_DATA, /* Reading data bytes */
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SMB_RECV_END, /* End of request */
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SMB_RECV_DROP, /* Dropping this SMB */
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SMB_RECV_REQUEST, /* Received a request and not a reply */
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};
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/* structure access macros */
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#define server_from_inode(inode) SMB_SB((inode)->i_sb)
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#define server_from_dentry(dentry) SMB_SB((dentry)->d_sb)
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#define SB_of(server) ((server)->super_block)
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struct smb_sb_info {
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/* List of all smbfs superblocks */
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struct list_head entry;
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enum smb_conn_state state;
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struct file * sock_file;
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int conn_error;
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enum smb_receive_state rstate;
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atomic_t nr_requests;
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struct list_head xmitq;
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struct list_head recvq;
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u16 mid;
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struct smb_mount_data_kernel *mnt;
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/* Connections are counted. Each time a new socket arrives,
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* generation is incremented.
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*/
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unsigned int generation;
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struct pid *conn_pid;
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struct smb_conn_opt opt;
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wait_queue_head_t conn_wq;
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int conn_complete;
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struct semaphore sem;
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unsigned char header[SMB_HEADER_LEN + 20*2 + 2];
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u32 header_len;
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u32 smb_len;
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u32 smb_read;
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/* We use our own data_ready callback, but need the original one */
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void *data_ready;
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/* nls pointers for codepage conversions */
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struct nls_table *remote_nls;
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struct nls_table *local_nls;
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struct smb_ops *ops;
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struct super_block *super_block;
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};
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static inline int
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smb_lock_server_interruptible(struct smb_sb_info *server)
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{
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return down_interruptible(&(server->sem));
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}
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static inline void
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smb_lock_server(struct smb_sb_info *server)
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{
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down(&(server->sem));
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}
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static inline void
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smb_unlock_server(struct smb_sb_info *server)
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{
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up(&(server->sem));
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}
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#endif /* __KERNEL__ */
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#endif
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