158 lines
4.5 KiB
C
158 lines
4.5 KiB
C
/*
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* smb_fs.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 _LINUX_SMB_FS_H
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#define _LINUX_SMB_FS_H
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#include <linux/smb.h>
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/*
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* ioctl commands
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*/
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#define SMB_IOC_GETMOUNTUID _IOR('u', 1, __kernel_old_uid_t)
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#define SMB_IOC_NEWCONN _IOW('u', 2, struct smb_conn_opt)
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/* __kernel_uid_t can never change, so we have to use __kernel_uid32_t */
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#define SMB_IOC_GETMOUNTUID32 _IOR('u', 3, __kernel_uid32_t)
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#ifdef __KERNEL__
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#include <linux/smb_fs_i.h>
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#include <linux/smb_fs_sb.h>
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#include <linux/fs.h>
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#include <linux/pagemap.h>
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#include <linux/vmalloc.h>
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#include <linux/smb_mount.h>
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#include <asm/unaligned.h>
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static inline struct smb_sb_info *SMB_SB(struct super_block *sb)
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{
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return sb->s_fs_info;
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}
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static inline struct smb_inode_info *SMB_I(struct inode *inode)
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{
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return container_of(inode, struct smb_inode_info, vfs_inode);
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}
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/* macro names are short for word, double-word, long value (?) */
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#define WVAL(buf,pos) \
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(le16_to_cpu(get_unaligned((__le16 *)((u8 *)(buf) + (pos)))))
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#define DVAL(buf,pos) \
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(le32_to_cpu(get_unaligned((__le32 *)((u8 *)(buf) + (pos)))))
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#define LVAL(buf,pos) \
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(le64_to_cpu(get_unaligned((__le64 *)((u8 *)(buf) + (pos)))))
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#define WSET(buf,pos,val) \
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put_unaligned(cpu_to_le16((u16)(val)), (__le16 *)((u8 *)(buf) + (pos)))
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#define DSET(buf,pos,val) \
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put_unaligned(cpu_to_le32((u32)(val)), (__le32 *)((u8 *)(buf) + (pos)))
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#define LSET(buf,pos,val) \
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put_unaligned(cpu_to_le64((u64)(val)), (__le64 *)((u8 *)(buf) + (pos)))
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/* where to find the base of the SMB packet proper */
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#define smb_base(buf) ((u8 *)(((u8 *)(buf))+4))
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/*
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* Flags for the in-memory inode
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*/
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#define SMB_F_LOCALWRITE 0x02 /* file modified locally */
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/* NT1 protocol capability bits */
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#define SMB_CAP_RAW_MODE 0x00000001
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#define SMB_CAP_MPX_MODE 0x00000002
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#define SMB_CAP_UNICODE 0x00000004
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#define SMB_CAP_LARGE_FILES 0x00000008
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#define SMB_CAP_NT_SMBS 0x00000010
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#define SMB_CAP_RPC_REMOTE_APIS 0x00000020
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#define SMB_CAP_STATUS32 0x00000040
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#define SMB_CAP_LEVEL_II_OPLOCKS 0x00000080
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#define SMB_CAP_LOCK_AND_READ 0x00000100
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#define SMB_CAP_NT_FIND 0x00000200
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#define SMB_CAP_DFS 0x00001000
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#define SMB_CAP_LARGE_READX 0x00004000
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#define SMB_CAP_LARGE_WRITEX 0x00008000
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#define SMB_CAP_UNIX 0x00800000 /* unofficial ... */
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/*
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* This is the time we allow an inode, dentry or dir cache to live. It is bad
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* for performance to have shorter ttl on an inode than on the cache. It can
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* cause refresh on each inode for a dir listing ... one-by-one
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*/
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#define SMB_MAX_AGE(server) (((server)->mnt->ttl * HZ) / 1000)
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static inline void
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smb_age_dentry(struct smb_sb_info *server, struct dentry *dentry)
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{
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dentry->d_time = jiffies - SMB_MAX_AGE(server);
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}
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struct smb_cache_head {
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time_t mtime; /* unused */
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unsigned long time; /* cache age */
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unsigned long end; /* last valid fpos in cache */
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int eof;
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};
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#define SMB_DIRCACHE_SIZE ((int)(PAGE_CACHE_SIZE/sizeof(struct dentry *)))
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union smb_dir_cache {
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struct smb_cache_head head;
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struct dentry *dentry[SMB_DIRCACHE_SIZE];
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};
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#define SMB_FIRSTCACHE_SIZE ((int)((SMB_DIRCACHE_SIZE * \
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sizeof(struct dentry *) - sizeof(struct smb_cache_head)) / \
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sizeof(struct dentry *)))
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#define SMB_DIRCACHE_START (SMB_DIRCACHE_SIZE - SMB_FIRSTCACHE_SIZE)
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struct smb_cache_control {
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struct smb_cache_head head;
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struct page *page;
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union smb_dir_cache *cache;
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unsigned long fpos, ofs;
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int filled, valid, idx;
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};
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#define SMB_OPS_NUM_STATIC 5
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struct smb_ops {
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int (*read)(struct inode *inode, loff_t offset, int count,
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char *data);
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int (*write)(struct inode *inode, loff_t offset, int count, const
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char *data);
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int (*readdir)(struct file *filp, void *dirent, filldir_t filldir,
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struct smb_cache_control *ctl);
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int (*getattr)(struct smb_sb_info *server, struct dentry *dir,
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struct smb_fattr *fattr);
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/* int (*setattr)(...); */ /* setattr is really icky! */
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int (*truncate)(struct inode *inode, loff_t length);
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/* --- --- --- end of "static" entries --- --- --- */
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int (*convert)(unsigned char *output, int olen,
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const unsigned char *input, int ilen,
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struct nls_table *nls_from,
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struct nls_table *nls_to);
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};
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static inline int
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smb_is_open(struct inode *i)
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{
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return (SMB_I(i)->open == server_from_inode(i)->generation);
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}
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extern void smb_install_null_ops(struct smb_ops *);
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#endif /* __KERNEL__ */
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#endif /* _LINUX_SMB_FS_H */
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