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 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