1/* 2 * smb_fs.h 3 * 4 * Copyright (C) 1995 by Paal-Kr. Engstad and Volker Lendecke 5 * Copyright (C) 1997 by Volker Lendecke 6 * 7 */ 8 9#ifndef _LINUX_SMB_FS_H 10#define _LINUX_SMB_FS_H 11 12#include <linux/smb.h> 13 14/* 15 * ioctl commands 16 */ 17#define SMB_IOC_GETMOUNTUID _IOR('u', 1, __kernel_old_uid_t) 18#define SMB_IOC_NEWCONN _IOW('u', 2, struct smb_conn_opt) 19 20/* __kernel_uid_t can never change, so we have to use __kernel_uid32_t */ 21#define SMB_IOC_GETMOUNTUID32 _IOR('u', 3, __kernel_uid32_t) 22 23 24#ifdef __KERNEL__ 25#include <linux/smb_fs_i.h> 26#include <linux/smb_fs_sb.h> 27 28#include <linux/fs.h> 29#include <linux/pagemap.h> 30#include <linux/vmalloc.h> 31#include <linux/smb_mount.h> 32#include <linux/jiffies.h> 33#include <asm/unaligned.h> 34 35static inline struct smb_sb_info *SMB_SB(struct super_block *sb) 36{ 37 return sb->s_fs_info; 38} 39 40static inline struct smb_inode_info *SMB_I(struct inode *inode) 41{ 42 return container_of(inode, struct smb_inode_info, vfs_inode); 43} 44 45/* macro names are short for word, double-word, long value (?) */ 46#define WVAL(buf,pos) \ 47 (le16_to_cpu(get_unaligned((__le16 *)((u8 *)(buf) + (pos))))) 48#define DVAL(buf,pos) \ 49 (le32_to_cpu(get_unaligned((__le32 *)((u8 *)(buf) + (pos))))) 50#define LVAL(buf,pos) \ 51 (le64_to_cpu(get_unaligned((__le64 *)((u8 *)(buf) + (pos))))) 52#define WSET(buf,pos,val) \ 53 put_unaligned(cpu_to_le16((u16)(val)), (__le16 *)((u8 *)(buf) + (pos))) 54#define DSET(buf,pos,val) \ 55 put_unaligned(cpu_to_le32((u32)(val)), (__le32 *)((u8 *)(buf) + (pos))) 56#define LSET(buf,pos,val) \ 57 put_unaligned(cpu_to_le64((u64)(val)), (__le64 *)((u8 *)(buf) + (pos))) 58 59/* where to find the base of the SMB packet proper */ 60#define smb_base(buf) ((u8 *)(((u8 *)(buf))+4)) 61 62/* 63 * Flags for the in-memory inode 64 */ 65#define SMB_F_LOCALWRITE 0x02 /* file modified locally */ 66 67 68/* NT1 protocol capability bits */ 69#define SMB_CAP_RAW_MODE 0x00000001 70#define SMB_CAP_MPX_MODE 0x00000002 71#define SMB_CAP_UNICODE 0x00000004 72#define SMB_CAP_LARGE_FILES 0x00000008 73#define SMB_CAP_NT_SMBS 0x00000010 74#define SMB_CAP_RPC_REMOTE_APIS 0x00000020 75#define SMB_CAP_STATUS32 0x00000040 76#define SMB_CAP_LEVEL_II_OPLOCKS 0x00000080 77#define SMB_CAP_LOCK_AND_READ 0x00000100 78#define SMB_CAP_NT_FIND 0x00000200 79#define SMB_CAP_DFS 0x00001000 80#define SMB_CAP_LARGE_READX 0x00004000 81#define SMB_CAP_LARGE_WRITEX 0x00008000 82#define SMB_CAP_UNIX 0x00800000 /* unofficial ... */ 83 84 85/* 86 * This is the time we allow an inode, dentry or dir cache to live. It is bad 87 * for performance to have shorter ttl on an inode than on the cache. It can 88 * cause refresh on each inode for a dir listing ... one-by-one 89 */ 90#define SMB_MAX_AGE(server) (((server)->mnt->ttl * HZ) / 1000) 91 92static inline void 93smb_age_dentry(struct smb_sb_info *server, struct dentry *dentry) 94{ 95 dentry->d_time = jiffies - SMB_MAX_AGE(server); 96} 97 98struct smb_cache_head { 99 time_t mtime; /* unused */ 100 unsigned long time; /* cache age */ 101 unsigned long end; /* last valid fpos in cache */ 102 int eof; 103}; 104 105#define SMB_DIRCACHE_SIZE ((int)(PAGE_CACHE_SIZE/sizeof(struct dentry *))) 106union smb_dir_cache { 107 struct smb_cache_head head; 108 struct dentry *dentry[SMB_DIRCACHE_SIZE]; 109}; 110 111#define SMB_FIRSTCACHE_SIZE ((int)((SMB_DIRCACHE_SIZE * \ 112 sizeof(struct dentry *) - sizeof(struct smb_cache_head)) / \ 113 sizeof(struct dentry *))) 114 115#define SMB_DIRCACHE_START (SMB_DIRCACHE_SIZE - SMB_FIRSTCACHE_SIZE) 116 117struct smb_cache_control { 118 struct smb_cache_head head; 119 struct page *page; 120 union smb_dir_cache *cache; 121 unsigned long fpos, ofs; 122 int filled, valid, idx; 123}; 124 125#define SMB_OPS_NUM_STATIC 5 126struct smb_ops { 127 int (*read)(struct inode *inode, loff_t offset, int count, 128 char *data); 129 int (*write)(struct inode *inode, loff_t offset, int count, const 130 char *data); 131 int (*readdir)(struct file *filp, void *dirent, filldir_t filldir, 132 struct smb_cache_control *ctl); 133 134 int (*getattr)(struct smb_sb_info *server, struct dentry *dir, 135 struct smb_fattr *fattr); 136 /* int (*setattr)(...); */ /* setattr is really icky! */ 137 138 int (*truncate)(struct inode *inode, loff_t length); 139 140 141 /* --- --- --- end of "static" entries --- --- --- */ 142 143 int (*convert)(unsigned char *output, int olen, 144 const unsigned char *input, int ilen, 145 struct nls_table *nls_from, 146 struct nls_table *nls_to); 147}; 148 149static inline int 150smb_is_open(struct inode *i) 151{ 152 return (SMB_I(i)->open == server_from_inode(i)->generation); 153} 154 155extern void smb_install_null_ops(struct smb_ops *); 156#endif /* __KERNEL__ */ 157 158#endif /* _LINUX_SMB_FS_H */ 159