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23#ifndef FS_9P_V9FS_H
24#define FS_9P_V9FS_H
25
26#include <linux/backing-dev.h>
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41#define V9FS_ACCESS_ANY (V9FS_ACCESS_SINGLE | \
42 V9FS_ACCESS_USER | \
43 V9FS_ACCESS_CLIENT)
44#define V9FS_ACCESS_MASK V9FS_ACCESS_ANY
45#define V9FS_ACL_MASK V9FS_POSIX_ACL
46
47enum p9_session_flags {
48 V9FS_PROTO_2000U = 0x01,
49 V9FS_PROTO_2000L = 0x02,
50 V9FS_ACCESS_SINGLE = 0x04,
51 V9FS_ACCESS_USER = 0x08,
52 V9FS_ACCESS_CLIENT = 0x10,
53 V9FS_POSIX_ACL = 0x20
54};
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64
65enum p9_cache_modes {
66 CACHE_NONE,
67 CACHE_MMAP,
68 CACHE_LOOSE,
69 CACHE_FSCACHE,
70 nr__p9_cache_modes
71};
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98struct v9fs_session_info {
99
100 unsigned char flags;
101 unsigned char nodev;
102 unsigned short debug;
103 unsigned int afid;
104 unsigned int cache;
105#ifdef CONFIG_9P_FSCACHE
106 char *cachetag;
107 struct fscache_cookie *fscache;
108#endif
109
110 char *uname;
111 char *aname;
112 unsigned int maxdata;
113 kuid_t dfltuid;
114 kgid_t dfltgid;
115 kuid_t uid;
116 struct p9_client *clnt;
117 struct list_head slist;
118 struct rw_semaphore rename_sem;
119};
120
121
122#define V9FS_INO_INVALID_ATTR 0x01
123
124struct v9fs_inode {
125#ifdef CONFIG_9P_FSCACHE
126 struct mutex fscache_lock;
127 struct fscache_cookie *fscache;
128#endif
129 struct p9_qid qid;
130 unsigned int cache_validity;
131 struct p9_fid *writeback_fid;
132 struct mutex v_mutex;
133 struct inode vfs_inode;
134};
135
136static inline struct v9fs_inode *V9FS_I(const struct inode *inode)
137{
138 return container_of(inode, struct v9fs_inode, vfs_inode);
139}
140
141extern int v9fs_show_options(struct seq_file *m, struct dentry *root);
142
143struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *,
144 char *);
145extern void v9fs_session_close(struct v9fs_session_info *v9ses);
146extern void v9fs_session_cancel(struct v9fs_session_info *v9ses);
147extern void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses);
148extern struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
149 unsigned int flags);
150extern int v9fs_vfs_unlink(struct inode *i, struct dentry *d);
151extern int v9fs_vfs_rmdir(struct inode *i, struct dentry *d);
152extern int v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
153 struct inode *new_dir, struct dentry *new_dentry,
154 unsigned int flags);
155extern struct inode *v9fs_inode_from_fid(struct v9fs_session_info *v9ses,
156 struct p9_fid *fid,
157 struct super_block *sb, int new);
158extern const struct inode_operations v9fs_dir_inode_operations_dotl;
159extern const struct inode_operations v9fs_file_inode_operations_dotl;
160extern const struct inode_operations v9fs_symlink_inode_operations_dotl;
161extern struct inode *v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses,
162 struct p9_fid *fid,
163 struct super_block *sb, int new);
164
165
166#define V9FS_PORT 564
167#define V9FS_DEFUSER "nobody"
168#define V9FS_DEFANAME ""
169#define V9FS_DEFUID KUIDT_INIT(-2)
170#define V9FS_DEFGID KGIDT_INIT(-2)
171
172static inline struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode)
173{
174 return (inode->i_sb->s_fs_info);
175}
176
177static inline struct v9fs_session_info *v9fs_dentry2v9ses(struct dentry *dentry)
178{
179 return dentry->d_sb->s_fs_info;
180}
181
182static inline int v9fs_proto_dotu(struct v9fs_session_info *v9ses)
183{
184 return v9ses->flags & V9FS_PROTO_2000U;
185}
186
187static inline int v9fs_proto_dotl(struct v9fs_session_info *v9ses)
188{
189 return v9ses->flags & V9FS_PROTO_2000L;
190}
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200static inline struct inode *
201v9fs_get_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
202 struct super_block *sb)
203{
204 if (v9fs_proto_dotl(v9ses))
205 return v9fs_inode_from_fid_dotl(v9ses, fid, sb, 0);
206 else
207 return v9fs_inode_from_fid(v9ses, fid, sb, 0);
208}
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218static inline struct inode *
219v9fs_get_new_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
220 struct super_block *sb)
221{
222 if (v9fs_proto_dotl(v9ses))
223 return v9fs_inode_from_fid_dotl(v9ses, fid, sb, 1);
224 else
225 return v9fs_inode_from_fid(v9ses, fid, sb, 1);
226}
227
228#endif
229