From fbaad9797a761c2d5ff6e755bbb4c046207a1ca2 Mon Sep 17 00:00:00 2001 From: Greg Farnum Date: Mon, 2 Aug 2010 15:30:08 -0700 Subject: [PATCH] ceph: define on-wire types, constants for file locking support Define the MDS operations and data types for doing file advisory locking with the MDS. Signed-off-by: Greg Farnum Signed-off-by: Sage Weil --- fs/ceph/ceph_fs.h | 36 ++++++++++++++++++++++++++++++++++-- fs/ceph/ceph_strings.c | 2 ++ 2 files changed, 36 insertions(+), 2 deletions(-) diff --git a/fs/ceph/ceph_fs.h b/fs/ceph/ceph_fs.h index bb17a18cc190..d5619ac86711 100644 --- a/fs/ceph/ceph_fs.h +++ b/fs/ceph/ceph_fs.h @@ -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 diff --git a/fs/ceph/ceph_strings.c b/fs/ceph/ceph_strings.c index 0f943a0a3b5e..c6179d3a26a2 100644 --- a/fs/ceph/ceph_strings.c +++ b/fs/ceph/ceph_strings.c @@ -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 "???"; } -- 2.30.2