diff options
Diffstat (limited to 'include/linux/coda_psdev.h')
| -rw-r--r-- | include/linux/coda_psdev.h | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/include/linux/coda_psdev.h b/include/linux/coda_psdev.h new file mode 100644 index 000000000..ecd213f8b --- /dev/null +++ b/include/linux/coda_psdev.h @@ -0,0 +1,143 @@ +#ifndef __CODA_PSDEV_H +#define __CODA_PSDEV_H + +#define CODA_PSDEV_MAJOR 67 +#define MAX_CODADEVS 5 /* how many do we allow */ + +extern struct vcomm psdev_vcomm[]; + +#define CODA_SUPER_MAGIC 0x73757245 + +struct coda_sb_info +{ + struct inode * sbi_psdev; /* /dev/cfs? Venus/kernel device */ + struct inode * sbi_ctlcp; /* control magic file */ + int sbi_refct; + struct vcomm * sbi_vcomm; + struct inode * sbi_root; +}; + + +static inline struct coda_sb_info *coda_sbp(struct super_block *sb) +{ + return ((struct coda_sb_info *)((sb)->u.generic_sbp)); +} + + + +extern void coda_psdev_detach(int unit); +extern int init_coda_psdev(void); + +/* to aid procedures make upcalls. They must have a + declaration at the top containing: + struct inputArgs *inp; + struct outputArgs *outp; + int error=0; + int size; +*/ + +#define UPARG(bsize, op)\ +do {\ + CODA_ALLOC(inp, struct inputArgs *, (bsize));\ + outp = (struct outputArgs *) (inp);\ + INIT_IN(inp, (op))\ + coda_load_creds(&(inp->cred));\ + size = (bsize);\ +} while (0) + +/* upcalls */ +int venus_rootfid(struct super_block *sb, ViceFid *fidp); +int venus_getattr(struct super_block *sb, struct ViceFid *fid, + struct coda_vattr *attr); +int venus_setattr(struct super_block *, struct ViceFid *, + struct coda_vattr *); +int venus_lookup(struct super_block *sb, struct ViceFid *fid, + const char *name, int length, int *type, + struct ViceFid *resfid); +int venus_release(struct super_block *sb, struct ViceFid *fid, int flags); +int venus_open(struct super_block *sb, struct ViceFid *fid, + int flags, ino_t *ino, dev_t *dev); +int venus_mkdir(struct super_block *sb, struct ViceFid *dirfid, + const char *name, int length, + struct ViceFid *newfid, struct coda_vattr *attrs); +int venus_create(struct super_block *sb, struct ViceFid *dirfid, + const char *name, int length, int excl, int mode, + struct ViceFid *newfid, struct coda_vattr *attrs) ; +int venus_rmdir(struct super_block *sb, struct ViceFid *dirfid, + const char *name, int length); +int venus_remove(struct super_block *sb, struct ViceFid *dirfid, + const char *name, int length); +int venus_readlink(struct super_block *sb, struct ViceFid *fid, + char *buffer, int *length); +int venus_rename(struct super_block *, struct ViceFid *new_fid, + struct ViceFid *old_fid, size_t old_length, + size_t new_length, const char *old_name, + const char *new_name); +int venus_link(struct super_block *sb, struct ViceFid *fid, + struct ViceFid *dirfid, const char *name, int len ); +int venus_symlink(struct super_block *sb, struct ViceFid *fid, + const char *name, int len, const char *symname, int symlen); +int venus_access(struct super_block *sb, struct ViceFid *fid, int mask); +int venus_pioctl(struct super_block *sb, struct ViceFid *fid, + unsigned int cmd, struct PioctlData *data); +int coda_downcall(int opcode, struct outputArgs *out); +int coda_upcall(struct coda_sb_info *mntinfo, int inSize, + int *outSize, struct inputArgs *buffer); + + +/* messages between coda filesystem in kernel and Venus */ +struct vmsg { + struct queue vm_chain; + caddr_t vm_data; + u_short vm_flags; + u_short vm_inSize; /* Size is at most 5000 bytes */ + u_short vm_outSize; + u_short vm_opcode; /* copied from data to save lookup */ + int vm_unique; + struct wait_queue *vm_sleep; /* process' wait queue */ +}; + +/* communication pending/processing queues queues */ +struct vcomm { + u_long vc_seq; + struct wait_queue *vc_waitq; /* Venus wait queue */ + struct queue vc_pending; + struct queue vc_processing; +}; + +static inline int vcomm_open(struct vcomm *vcp) +{ + return ((vcp)->vc_pending.forw != NULL); +} + +static inline void mark_vcomm_closed(struct vcomm *vcp) +{ + (vcp)->vc_pending.forw = NULL; +} + +/* + * Statistics + */ +struct coda_upcallstats { + int ncalls; /* client requests */ + int nbadcalls; /* upcall failures */ + int reqs[CFS_NCALLS]; /* count of each request */ +} ; + +extern struct coda_upcallstats coda_callstats; + +static inline void clstats(int opcode) +{ + coda_callstats.ncalls++; + if ( (0 <= opcode) && (opcode <= CFS_NCALLS) ) + coda_callstats.reqs[opcode]++; + else + printk("clstats called with bad opcode %d\n", opcode); +} + +static inline void badclstats(void) +{ + coda_callstats.nbadcalls++; +} + +#endif |