1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __CODA_PSDEV_H
3 #define __CODA_PSDEV_H
4
5 #include <linux/backing-dev.h>
6 #include <linux/magic.h>
7 #include <linux/mutex.h>
8
9 #define CODA_PSDEV_MAJOR 67
10 #define MAX_CODADEVS 5 /* how many do we allow */
11
12 struct kstatfs;
13
14 /* messages between coda filesystem in kernel and Venus */
15 struct upc_req {
16 struct list_head uc_chain;
17 caddr_t uc_data;
18 u_short uc_flags;
19 u_short uc_inSize; /* Size is at most 5000 bytes */
20 u_short uc_outSize;
21 u_short uc_opcode; /* copied from data to save lookup */
22 int uc_unique;
23 wait_queue_head_t uc_sleep; /* process' wait queue */
24 };
25
26 #define CODA_REQ_ASYNC 0x1
27 #define CODA_REQ_READ 0x2
28 #define CODA_REQ_WRITE 0x4
29 #define CODA_REQ_ABORT 0x8
30
31 /* communication pending/processing queues */
32 struct venus_comm {
33 u_long vc_seq;
34 wait_queue_head_t vc_waitq; /* Venus wait queue */
35 struct list_head vc_pending;
36 struct list_head vc_processing;
37 int vc_inuse;
38 struct super_block *vc_sb;
39 struct mutex vc_mutex;
40 };
41
coda_vcp(struct super_block * sb)42 static inline struct venus_comm *coda_vcp(struct super_block *sb)
43 {
44 return (struct venus_comm *)((sb)->s_fs_info);
45 }
46
47 /* upcalls */
48 int venus_rootfid(struct super_block *sb, struct CodaFid *fidp);
49 int venus_getattr(struct super_block *sb, struct CodaFid *fid,
50 struct coda_vattr *attr);
51 int venus_setattr(struct super_block *, struct CodaFid *, struct coda_vattr *);
52 int venus_lookup(struct super_block *sb, struct CodaFid *fid,
53 const char *name, int length, int *type,
54 struct CodaFid *resfid);
55 int venus_close(struct super_block *sb, struct CodaFid *fid, int flags,
56 kuid_t uid);
57 int venus_open(struct super_block *sb, struct CodaFid *fid, int flags,
58 struct file **f);
59 int venus_mkdir(struct super_block *sb, struct CodaFid *dirfid,
60 const char *name, int length,
61 struct CodaFid *newfid, struct coda_vattr *attrs);
62 int venus_create(struct super_block *sb, struct CodaFid *dirfid,
63 const char *name, int length, int excl, int mode,
64 struct CodaFid *newfid, struct coda_vattr *attrs);
65 int venus_rmdir(struct super_block *sb, struct CodaFid *dirfid,
66 const char *name, int length);
67 int venus_remove(struct super_block *sb, struct CodaFid *dirfid,
68 const char *name, int length);
69 int venus_readlink(struct super_block *sb, struct CodaFid *fid,
70 char *buffer, int *length);
71 int venus_rename(struct super_block *sb, struct CodaFid *new_fid,
72 struct CodaFid *old_fid, size_t old_length,
73 size_t new_length, const char *old_name,
74 const char *new_name);
75 int venus_link(struct super_block *sb, struct CodaFid *fid,
76 struct CodaFid *dirfid, const char *name, int len );
77 int venus_symlink(struct super_block *sb, struct CodaFid *fid,
78 const char *name, int len, const char *symname, int symlen);
79 int venus_access(struct super_block *sb, struct CodaFid *fid, int mask);
80 int venus_pioctl(struct super_block *sb, struct CodaFid *fid,
81 unsigned int cmd, struct PioctlData *data);
82 int coda_downcall(struct venus_comm *vcp, int opcode, union outputArgs *out,
83 size_t nbytes);
84 int venus_fsync(struct super_block *sb, struct CodaFid *fid);
85 int venus_statfs(struct dentry *dentry, struct kstatfs *sfs);
86 int venus_access_intent(struct super_block *sb, struct CodaFid *fid,
87 bool *access_intent_supported,
88 size_t count, loff_t ppos, int type);
89
90 /*
91 * Statistics
92 */
93
94 extern struct venus_comm coda_comms[];
95 #endif
96