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ceph: define on-wire types, constants for file locking support

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Define the MDS operations and data types for doing file advisory locking
with the MDS.

Signed-off-by: Greg Farnum <gregf@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Greg Farnum 2010-08-02 15:30:08 -07:00 committed by Sage Weil
parent c6f3fdc592
commit fbaad9797a
2 changed files with 36 additions and 2 deletions
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36
fs/ceph/ceph_fs.h
View File

@ -297,6 +297,8 @@ enum {
CEPH_MDS_OP_RMXATTR = 0x01106,
CEPH_MDS_OP_SETLAYOUT = 0x01107,
CEPH_MDS_OP_SETATTR = 0x01108,
CEPH_MDS_OP_SETFILELOCK= 0x01109,
CEPH_MDS_OP_GETFILELOCK= 0x00110,
CEPH_MDS_OP_MKNOD = 0x01201,
CEPH_MDS_OP_LINK = 0x01202,
@ -367,6 +369,15 @@ union ceph_mds_request_args {
struct {
struct ceph_file_layout layout;
} __attribute__ ((packed)) setlayout;
struct {
__u8 rule; /* currently fcntl or flock */
__u8 type; /* shared, exclusive, remove*/
__le64 pid; /* process id requesting the lock */
__le64 pid_namespace;
__le64 start; /* initial location to lock */
__le64 length; /* num bytes to lock from start */
__u8 wait; /* will caller wait for lock to become available? */
} __attribute__ ((packed)) filelock_change;
} __attribute__ ((packed));
#define CEPH_MDS_FLAG_REPLAY 1 /* this is a replayed op */
@ -461,6 +472,23 @@ struct ceph_mds_reply_dirfrag {
__le32 dist[];
} __attribute__ ((packed));
#define CEPH_LOCK_FCNTL 1
#define CEPH_LOCK_FLOCK 2
#define CEPH_LOCK_SHARED 1
#define CEPH_LOCK_EXCL 2
#define CEPH_LOCK_UNLOCK 4
struct ceph_filelock {
__le64 start;/* file offset to start lock at */
__le64 length; /* num bytes to lock; 0 for all following start */
__le64 client; /* which client holds the lock */
__le64 pid; /* process id holding the lock on the client */
__le64 pid_namespace;
__u8 type; /* shared lock, exclusive lock, or unlock */
} __attribute__ ((packed));
/* file access modes */
#define CEPH_FILE_MODE_PIN 0
#define CEPH_FILE_MODE_RD 1
@ -489,9 +517,10 @@ int ceph_flags_to_mode(int flags);
#define CEPH_CAP_SAUTH 2
#define CEPH_CAP_SLINK 4
#define CEPH_CAP_SXATTR 6
#define CEPH_CAP_SFILE 8 /* goes at the end (uses >2 cap bits) */
#define CEPH_CAP_SFILE 8
#define CEPH_CAP_SFLOCK 20
#define CEPH_CAP_BITS 16
#define CEPH_CAP_BITS 22
/* composed values */
#define CEPH_CAP_AUTH_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SAUTH)
@ -509,6 +538,9 @@ int ceph_flags_to_mode(int flags);
#define CEPH_CAP_FILE_BUFFER (CEPH_CAP_GBUFFER << CEPH_CAP_SFILE)
#define CEPH_CAP_FILE_WREXTEND (CEPH_CAP_GWREXTEND << CEPH_CAP_SFILE)
#define CEPH_CAP_FILE_LAZYIO (CEPH_CAP_GLAZYIO << CEPH_CAP_SFILE)
#define CEPH_CAP_FLOCK_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SFLOCK)
#define CEPH_CAP_FLOCK_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SFLOCK)
/* cap masks (for getattr) */
#define CEPH_STAT_CAP_INODE CEPH_CAP_PIN

2
fs/ceph/ceph_strings.c
View File

@ -130,6 +130,8 @@ const char *ceph_mds_op_name(int op)
case CEPH_MDS_OP_LSSNAP: return "lssnap";
case CEPH_MDS_OP_MKSNAP: return "mksnap";
case CEPH_MDS_OP_RMSNAP: return "rmsnap";
case CEPH_MDS_OP_SETFILELOCK: return "setfilelock";
case CEPH_MDS_OP_GETFILELOCK: return "getfilelock";
}
return "???";
}