IO Service State Machines

Data Structures
struct	m0_ios_start_sm

Enumerations
enum	m0_ios_start_state {   M0_IOS_START_INIT, M0_IOS_START_CDOM_CREATE, M0_IOS_START_CDOM_CREATE_RES, M0_IOS_START_MKFS,   M0_IOS_START_MKFS_RESULT, M0_IOS_START_BUFFER_POOL_CREATE, M0_IOS_START_FAILURE, M0_IOS_START_COMPLETE }

Functions
M0_INTERNAL void	m0_ios_start_lock (struct m0_ios_start_sm *ios_sm)
M0_INTERNAL void	m0_ios_start_unlock (struct m0_ios_start_sm *ios_sm)
M0_INTERNAL int	m0_ios_start_sm_init (struct m0_ios_start_sm *ios_sm, struct m0_reqh_service *service, struct m0_sm_group *grp)
M0_INTERNAL void	m0_ios_start_sm_exec (struct m0_ios_start_sm *ios_sm)
M0_INTERNAL void	m0_ios_start_sm_fini (struct m0_ios_start_sm *ios_sm)

Detailed Description

State machine for start IO service

See also

I/O Service Operations

State machines execute general steps async:

• Create COB domain if it does not exist
• Create Create initial files system structures,

  See also

  m0_cob_domain_mkfs

• Poolmachine init

Enumeration Type Documentation

m0_ios_start_state

enum m0_ios_start_state

IO service start SM states.

Note! BE TX create/open/close/destroy up to three times: create COB domain, create MKFS, init poolmachine

Enumerator
M0_IOS_START_INIT	SM initial state. Next state is determined on whether COB domain is created or not. Get m0_get()->i_ios_cdom_key, if COB domain doesn't exist then open BE TX to create it, otherwise initialise COB domain.
M0_IOS_START_CDOM_CREATE	Create COB domain, close BE TX
M0_IOS_START_CDOM_CREATE_RES	If COM domain is created then open BE TX for create MKFS else create poolmachine and start BE TX for fill poolmachine
M0_IOS_START_MKFS	Create MKFS, close BE TX
M0_IOS_START_MKFS_RESULT	Create poolmachine
M0_IOS_START_BUFFER_POOL_CREATE	Create buffer pool and get filesystem conf object
M0_IOS_START_FAILURE	Handle errors from other states
M0_IOS_START_COMPLETE	Finish state

Definition at line 91 of file ios_start_sm.h.

Function Documentation

m0_ios_start_lock()

M0_INTERNAL void m0_ios_start_lock

(

struct m0_ios_start_sm *

ios_sm

)

Definition at line 111 of file ios_start_sm.c.

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m0_ios_start_sm_exec()

M0_INTERNAL void m0_ios_start_sm_exec

(

struct m0_ios_start_sm *

ios_sm

)

Execute IO service start SM. User is expected to wait until ios_sm->ism_sm.sm_state is in (M0_IOS_START_COMPLETE, M0_IOS_START_FAILURE).

Definition at line 211 of file ios_start_sm.c.

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m0_ios_start_sm_fini()

M0_INTERNAL void m0_ios_start_sm_fini

(

struct m0_ios_start_sm *

ios_sm

)

Finalize IO service start SM.

Definition at line 463 of file ios_start_sm.c.

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m0_ios_start_sm_init()

M0_INTERNAL int m0_ios_start_sm_init	(	struct m0_ios_start_sm *	ios_sm,
		struct m0_reqh_service *	service,
		struct m0_sm_group *	grp
	)

Initialize IO service start State machine

Parameters

ios_sm	- IO service start State machine instance
service	- IO service
grp	- m0_sm_group for initialize ios_sm->ism_sm

Definition at line 190 of file ios_start_sm.c.

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m0_ios_start_unlock()

M0_INTERNAL void m0_ios_start_unlock

(

struct m0_ios_start_sm *

ios_sm

)

Definition at line 116 of file ios_start_sm.c.

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