file_internal.h File Reference

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Data Structures
struct	nw_xfer_ops
struct	nw_xfer_request
struct	io_request_ops
struct	io_request
struct	data_buf
struct	pargrp_iomap
struct	pargrp_iomap_ops
struct	target_ioreq_ops
struct	dgmode_rwvec
struct	cc_req_fop
struct	target_ioreq
struct	io_req_fop

Macros
#define	__MOTR_M0T1FS_FILE_INTERNAL_H__

Enumerations
enum	page_attr {   PA_NONE = 0, PA_READ = (1 << 0), PA_FULLPAGE_MODIFY = (1 << 1), PA_PARTPAGE_MODIFY = (1 << 2),   PA_WRITE = (1 << 3), PA_DATA = (1 << 4), PA_PARITY = (1 << 5), PA_COPY_FRMUSR_DONE = (1 << 6),   PA_READ_FAILED = (1 << 7), PA_DGMODE_READ = (1 << 8), PA_DGMODE_WRITE = (1 << 9), PA_NR = 10,   PA_NONE = 0, PA_READ = (1 << 0), PA_FULLPAGE_MODIFY = (1 << 1), PA_PARTPAGE_MODIFY = (1 << 2),   PA_WRITE = (1 << 3), PA_DATA = (1 << 4), PA_PARITY = (1 << 5), PA_COPY_FRMUSR_DONE = (1 << 6),   PA_READ_FAILED = (1 << 7), PA_DGMODE_READ = (1 << 8), PA_DGMODE_WRITE = (1 << 9), PA_APP_MEMORY = (1 << 10),   PA_TRUNC = (1 << 11), PA_NR = 12 }
enum	copy_direction {   CD_COPY_FROM_USER, CD_COPY_TO_USER, CD_NR, CD_COPY_FROM_APP,   CD_COPY_TO_APP }
enum	nw_xfer_state {   NXS_UNINITIALIZED, NXS_INITIALIZED, NXS_INFLIGHT, NXS_COMPLETE,   NXS_STATE_NR, NXS_UNINITIALIZED, NXS_INITIALIZED, NXS_INFLIGHT,   NXS_COMPLETE, NXS_STATE_NR }
enum	io_req_state {   IRS_UNINITIALIZED, IRS_INITIALIZED, IRS_READING, IRS_WRITING,   IRS_READ_COMPLETE, IRS_WRITE_COMPLETE, IRS_DEGRADED_READING, IRS_DEGRADED_WRITING,   IRS_REQ_COMPLETE, IRS_FAILED }
enum	pargrp_iomap_rmwtype {   PIR_NONE, PIR_READOLD, PIR_READREST, PIR_NR,   PIR_NONE, PIR_READOLD, PIR_READREST, PIR_NR }
enum	pargrp_iomap_state {   PI_NONE, PI_HEALTHY, PI_DEGRADED, PI_NR,   PI_NONE, PI_HEALTHY, PI_DEGRADED, PI_NR }
enum	target_ioreq_type {   TI_NONE, TI_READ_WRITE, TI_COB_CREATE, TI_NONE,   TI_READ_WRITE, TI_COB_CREATE, TI_COB_TRUNCATE }

Functions
M0_INTERNAL struct inode *	m0t1fs_file_to_inode (const struct file *file)
M0_INTERNAL struct m0t1fs_inode *	m0t1fs_file_to_m0inode (const struct file *file)
M0_INTERNAL struct m0t1fs_inode *	m0t1fs_inode_to_m0inode (const struct inode *inode)
M0_INTERNAL struct m0t1fs_sb *	m0inode_to_sb (const struct m0t1fs_inode *m0inode)

Macro Definition Documentation

__MOTR_M0T1FS_FILE_INTERNAL_H__

#define __MOTR_M0T1FS_FILE_INTERNAL_H__

Definition at line 26 of file file_internal.h.

Enumeration Type Documentation

copy_direction

enum copy_direction

Enum representing direction of data copy in IO.

Enumerator
CD_COPY_FROM_USER
CD_COPY_TO_USER
CD_NR
CD_COPY_FROM_APP
CD_COPY_TO_APP

Definition at line 1127 of file file_internal.h.

io_req_state

enum io_req_state

Represents state of IO request call. m0_sm_state_descr structure will be defined for description of all states mentioned below.

Enumerator
IRS_UNINITIALIZED
IRS_INITIALIZED
IRS_READING
IRS_WRITING
IRS_READ_COMPLETE
IRS_WRITE_COMPLETE
IRS_DEGRADED_READING
IRS_DEGRADED_WRITING
IRS_REQ_COMPLETE
IRS_FAILED

Definition at line 1248 of file file_internal.h.

nw_xfer_state

enum nw_xfer_state

State of struct nw_xfer_request.

Enumerator
NXS_UNINITIALIZED
NXS_INITIALIZED
NXS_INFLIGHT
NXS_COMPLETE
NXS_STATE_NR
NXS_UNINITIALIZED
NXS_INITIALIZED
NXS_INFLIGHT
NXS_COMPLETE
NXS_STATE_NR

Definition at line 1134 of file file_internal.h.

page_attr

enum page_attr

Page attributes for all pages spanned by pargrp_iomap::pi_ivec. This enum is also used by data_buf::db_flags.

Enumerator
PA_NONE	Page not spanned by io vector.
PA_READ	Page needs to be read.
PA_FULLPAGE_MODIFY	Page is completely spanned by incoming io vector, which is why file data can be modified while read IO is going on. Such pages need not be read from server. Mutually exclusive with PA_READ and PA_PARTPAGE_MODIFY.
PA_PARTPAGE_MODIFY	Page is partially spanned by incoming io vector, which is why it has to wait till the whole page (superset) is read first and then it can be modified as per user request. Used only in case of read-modify-write. Mutually exclusive with PA_FULLPAGE_MODIFY.
PA_WRITE	Page needs to be written.
PA_DATA	Page contains file data.
PA_PARITY	Page contains parity.
PA_COPY_FRMUSR_DONE	Data has been copied from user-space into page. Flag used only when copy_direction == CD_COPY_FROM_USER. This flag is needed since in case of read-old approach, even if page/s are fully modified, they have to be read in order to generate correct parity. Hence for read-modify-write requests, fully modified pages from parity groups which have adopted read-old approach can not be copied before read state finishes.
PA_READ_FAILED	Read IO failed for given page.
PA_DGMODE_READ	Page needs to be read in degraded mode read IO state.
PA_DGMODE_WRITE	Page needs to be written in degraded mode write IO state.
PA_NR
PA_NONE	Page not spanned by io vector.
PA_READ	Page needs to be read.
PA_FULLPAGE_MODIFY	Page is completely spanned by incoming io vector, which is why file data can be modified while read IO is going on. Such pages need not be read from server. Mutually exclusive with PA_READ and PA_PARTPAGE_MODIFY.
PA_PARTPAGE_MODIFY	Page is partially spanned by incoming io vector, which is why it has to wait till the whole page (superset) is read first and then it can be modified as per user request. Used only in case of read-modify-write. Mutually exclusive with PA_FULLPAGE_MODIFY.
PA_WRITE	Page needs to be written.
PA_DATA	Page contains file data.
PA_PARITY	Page contains parity.
PA_COPY_FRMUSR_DONE	Data has been copied from user-space into page. Flag used only when copy_direction == CD_COPY_FROM_USER. This flag is needed since in case of read-old approach, even if page/s are fully modified, they have to be read in order to generate correct parity. Hence for read-modify-write requests, fully modified pages from parity groups which have adopted read-old approach can not be copied before read state finishes.
PA_READ_FAILED	Read IO failed for given page.
PA_DGMODE_READ	Page needs to be read in degraded mode read IO state.
PA_DGMODE_WRITE	Page needs to be written in degraded mode write IO state.
PA_APP_MEMORY	The application provided this memory, don't try to free it
PA_TRUNC	This page will be truncated, so don't do RW operation.
PA_NR

Definition at line 1069 of file file_internal.h.

pargrp_iomap_rmwtype

enum pargrp_iomap_rmwtype

Type of read approach used by pargrp_iomap structure in case of rmw IO.

Enumerator
PIR_NONE
PIR_READOLD
PIR_READREST
PIR_NR
PIR_NONE
PIR_READOLD
PIR_READREST
PIR_NR

Definition at line 1483 of file file_internal.h.

pargrp_iomap_state

enum pargrp_iomap_state

State of parity group during IO life-cycle.

Enumerator
PI_NONE
PI_HEALTHY
PI_DEGRADED
PI_NR
PI_NONE
PI_HEALTHY
PI_DEGRADED
PI_NR

Definition at line 1491 of file file_internal.h.

target_ioreq_type

enum target_ioreq_type

A request for a target can be of two types, either for read/write IO or for cob creation for the target on remote ioservice.

Enumerator
TI_NONE
TI_READ_WRITE
TI_COB_CREATE
TI_NONE
TI_READ_WRITE
TI_COB_CREATE
TI_COB_TRUNCATE

Definition at line 1747 of file file_internal.h.

Function Documentation

m0inode_to_sb()

M0_INTERNAL struct m0t1fs_sb* m0inode_to_sb

(

const struct m0t1fs_inode *

m0inode

)

Definition at line 472 of file file.c.

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m0t1fs_file_to_inode()

M0_INTERNAL struct inode* m0t1fs_file_to_inode

(

const struct file *

file

)

Definition at line 435 of file file.c.

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m0t1fs_file_to_m0inode()

M0_INTERNAL struct m0t1fs_inode* m0t1fs_file_to_m0inode

(

const struct file *

file

)

Definition at line 444 of file file.c.

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m0t1fs_inode_to_m0inode()

M0_INTERNAL struct m0t1fs_inode* m0t1fs_inode_to_m0inode

(

const struct inode *

inode

)

Definition at line 462 of file file.c.

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