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scoutfs-utils: update format for locking service

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Update the format header to reflect that the kernel now uses a locking
service instead of using an fs/dlm lockspace.  Nothing in userspace uses
locking.

Signed-off-by: Zach Brown <zab@versity.com>
This commit is contained in:
Zach Brown
2019-01-14 14:51:49 -08:00
committed by Zach Brown
parent 02d2edb467
commit dd117593da
1 changed files with 42 additions and 19 deletions
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61
utils/src/format.h
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@@ -320,7 +320,8 @@ struct scoutfs_segment_block {
#define SCOUTFS_INODE_INDEX_ZONE 1
#define SCOUTFS_NODE_ZONE 2
#define SCOUTFS_FS_ZONE 3
#define SCOUTFS_MAX_ZONE 4 /* power of 2 is efficient */
#define SCOUTFS_LOCK_ZONE 4
#define SCOUTFS_MAX_ZONE 8 /* power of 2 is efficient */
/* inode index zone */
#define SCOUTFS_INODE_INDEX_META_SEQ_TYPE 1
@@ -341,6 +342,9 @@ struct scoutfs_segment_block {
#define SCOUTFS_FILE_EXTENT_TYPE 7
#define SCOUTFS_ORPHAN_TYPE 8
/* lock zone, only ever found in lock ranges, never in persistent items */
#define SCOUTFS_RENAME_TYPE 1
#define SCOUTFS_MAX_TYPE 16 /* power of 2 is efficient */
/*
@@ -556,26 +560,8 @@ enum {
#define SCOUTFS_MAX_VAL_SIZE SCOUTFS_XATTR_MAX_PART_SIZE
/*
* structures used by dlm
*/
#define SCOUTFS_LOCK_SCOPE_GLOBAL 1
#define SCOUTFS_LOCK_SCOPE_FS_ITEMS 2
#define SCOUTFS_LOCK_TYPE_GLOBAL_RENAME 1
#define SCOUTFS_LOCK_TYPE_GLOBAL_SERVER 2
struct scoutfs_lock_name {
__u8 scope;
__u8 zone;
__u8 type;
__le64 first;
__le64 second;
} __packed;
#define SCOUTFS_LOCK_INODE_GROUP_NR 1024
#define SCOUTFS_LOCK_INODE_GROUP_MASK (SCOUTFS_LOCK_INODE_GROUP_NR - 1)
#define SCOUTFS_LOCK_SEQ_GROUP_MASK ((1ULL << 10) - 1)
/*
@@ -623,6 +609,7 @@ enum {
SCOUTFS_NET_CMD_GET_MANIFEST_ROOT,
SCOUTFS_NET_CMD_STATFS,
SCOUTFS_NET_CMD_COMPACT,
SCOUTFS_NET_CMD_LOCK,
SCOUTFS_NET_CMD_UNKNOWN,
};
@@ -742,6 +729,42 @@ struct scoutfs_net_compact_response {
struct scoutfs_net_manifest_entry ents[SCOUTFS_COMPACTION_MAX_OUTPUT];
} __packed;
struct scoutfs_net_lock {
struct scoutfs_key key;
__u8 old_mode;
__u8 new_mode;
} __packed;
/* some enums for tracing */
enum {
SLT_CLIENT,
SLT_SERVER,
SLT_GRANT,
SLT_INVALIDATE,
SLT_REQUEST,
SLT_RESPONSE,
};
/*
* Read and write locks operate as you'd expect. Multiple readers can
* hold read locks while writers are excluded. A single writer can hold
* a write lock which excludes other readers and writers. Writers can
* read while holding a write lock.
*
* Multiple writers can hold write only locks but they can not read,
* they can only generate dirty items. It's used when the system has
* other means of knowing that it's safe to overwrite items.
*
* The null mode provides no access and is used to destroy locks.
*/
enum {
SCOUTFS_LOCK_NULL = 0,
SCOUTFS_LOCK_READ,
SCOUTFS_LOCK_WRITE,
SCOUTFS_LOCK_WRITE_ONLY,
SCOUTFS_LOCK_INVALID,
};
/*
* Scoutfs file handle structure - this can be copied out to userspace
* via open by handle or put on the wire from NFS.