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VFS-FS protocol: add versioning

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Change-Id: Ice6fbfd4b535b7435653fa08b27a3378d1cfdbf8
This commit is contained in:
Thomas Veerman
2013-03-25 21:09:10 +00:00
committed by Lionel Sambuc
parent 7ebdb97a28
commit c66fd312d4
12 changed files with 98 additions and 54 deletions
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24
include/minix/vfsif.h
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@@ -39,6 +39,7 @@
#define REQ_TRC_START_LO m9_l3
#define REQ_UCRED_SIZE m9_s4
#define REQ_UID m9_s4
#define REQ_PROTO m9_s4 /* For definition see RES_PROTO */
/* VFS/FS reply fields */
@@ -54,11 +55,32 @@
#define RES_SEEK_POS_LO m9_l4
#define RES_SYMLOOP m9_s3
#define RES_UID m9_s4
#define RES_CONREQS m9_s3
#define RES_PROTO m9_s3
/* RES_PROTO is defined as follows:
* |----------------|
* 7V 4CR 0
* 15 0
* mentioned bits are inclusive
* CR: bits 4-0 encode no. concurrent requests are supported by FS
* V: bits 7-5 encode version of protocol
*/
#define RES_PROTO_CR_SHIFT 0
#define RES_PROTO_CR_MASK 0x1F
#define VFS_FS_PROTO_CONREQS(b) (((b) & RES_PROTO_CR_MASK)>>RES_PROTO_CR_SHIFT)
#define VFS_FS_PROTO_PUT_CONREQS(b,v) \
((b) |= (((v) << RES_PROTO_CR_SHIFT) & RES_PROTO_CR_MASK))
#define RES_PROTO_V_SHIFT 5
#define RES_PROTO_V_MASK 0x70
#define VFS_FS_PROTO_VERSION(b) (((b) & RES_PROTO_V_MASK) >> RES_PROTO_V_SHIFT)
#define VFS_FS_PROTO_PUT_VERSION(b,v) \
((b) |= (((v) << RES_PROTO_V_SHIFT) & RES_PROTO_V_MASK))
#define VFS_FS_CURRENT_VERSION 0 /* Current version */
/* VFS/FS flags */
#define REQ_RDONLY 001
#define REQ_ISROOT 002
#define REQ_HASPROTO 004
#define PATH_NOFLAGS 000
#define PATH_RET_SYMLINK 010 /* Return a symlink object (i.e.
* do not continue with the contents