/*
* pNFS client data structures .
*
* Copyright ( c ) 2002
* The Regents of the University of Michigan
* All Rights Reserved
*
* Dean Hildebrand < dhildebz @ umich . edu >
*
* Permission is granted to use , copy , create derivative works , and
* redistribute this software and such derivative works for any purpose ,
* so long as the name of the University of Michigan is not used in
* any advertising or publicity pertaining to the use or distribution
* of this software without specific , written prior authorization . If
* the above copyright notice or any other identification of the
* University of Michigan is included in any copy of any portion of
* this software , then the disclaimer below must also be included .
*
* This software is provided as is , without representation or warranty
* of any kind either express or implied , including without limitation
* the implied warranties of merchantability , fitness for a particular
* purpose , or noninfringement . The Regents of the University of
* Michigan shall not be liable for any damages , including special ,
* indirect , incidental , or consequential damages , with respect to any
* claim arising out of or in connection with the use of the software ,
* even if it has been or is hereafter advised of the possibility of
* such damages .
* /
# ifndef FS_NFS_PNFS_H
# define FS_NFS_PNFS_H
# include < linux / refcount . h >
# include < linux / nfs_fs . h >
# include < linux / nfs_page . h >
# include < linux / workqueue . h >
struct nfs4_exception ;
struct nfs4_opendata ;
enum {
NFS_LSEG_VALID = 0 , / * cleared when lseg is recalled / returned * /
NFS_LSEG_ROC , / * roc bit received from server * /
NFS_LSEG_LAYOUTCOMMIT , / * layoutcommit bit set for layoutcommit * /
NFS_LSEG_LAYOUTRETURN , / * layoutreturn bit set for layoutreturn * /
NFS_LSEG_UNAVAILABLE , / * unavailable bit set for temporary problem * /
} ;
/ * Individual ip address * /
struct nfs4_pnfs_ds_addr {
struct sockaddr_storage da_addr ;
size_t da_addrlen ;
struct list_head da_node ; / * nfs4_pnfs_dev_hlist dev_dslist * /
char * da_remotestr ; / * human readable addr + port * /
const char * da_netid ;
int da_transport ;
} ;
struct nfs4_pnfs_ds {
struct list_head ds_node ; / * nfs4_pnfs_dev_hlist dev_dslist * /
char * ds_remotestr ; / * comma sep list of addrs * /
struct list_head ds_addrs ;
const struct net * ds_net ;
struct nfs_client * ds_clp ;
refcount_t ds_count ;
unsigned long ds_state ;
# define NFS4DS_CONNECTING 0 / * ds is establishing connection * /
} ;
struct pnfs_layout_segment {
struct list_head pls_list ;
struct list_head pls_lc_list ;
struct list_head pls_commits ;
struct pnfs_layout_range pls_range ;
refcount_t pls_refcount ;
u32 pls_seq ;
unsigned long pls_flags ;
struct pnfs_layout_hdr * pls_layout ;
} ;
enum pnfs_try_status {
PNFS_ATTEMPTED = 0 ,
PNFS_NOT_ATTEMPTED = 1 ,
PNFS_TRY_AGAIN = 2 ,
} ;
# ifdef CONFIG_NFS_V4_1
# define LAYOUT_NFSV4_1_MODULE_PREFIX " nfs - layouttype4 "
/ *
* Default data server connection timeout and retrans vaules .
* Set by module parameters dataserver_timeo and dataserver_retrans .
* /
# define NFS4_DEF_DS_TIMEO 600 / * in tenths of a second * /
# define NFS4_DEF_DS_RETRANS 5
# define PNFS_DEVICE_RETRY_TIMEOUT ( 120 * HZ )
enum {
NFS_LAYOUT_RO_FAILED = 0 , / * get ro layout failed stop trying * /
NFS_LAYOUT_RW_FAILED , / * get rw layout failed stop trying * /
NFS_LAYOUT_BULK_RECALL , / * bulk recall affecting layout * /
NFS_LAYOUT_RETURN , / * layoutreturn in progress * /
NFS_LAYOUT_RETURN_LOCK , / * Serialise layoutreturn * /
NFS_LAYOUT_RETURN_REQUESTED , / * Return this layout ASAP * /
NFS_LAYOUT_INVALID_STID , / * layout stateid id is invalid * /
NFS_LAYOUT_FIRST_LAYOUTGET , / * Serialize first layoutget * /
NFS_LAYOUT_INODE_FREEING , / * The inode is being freed * /
NFS_LAYOUT_HASHED , / * The layout visible * /
NFS_LAYOUT_DRAIN ,
} ;
enum layoutdriver_policy_flags {
/ * Should the pNFS client commit and return the layout upon truncate to
* a smaller size * /
PNFS_LAYOUTRET_ON_SETATTR = 1 < < 0 ,
PNFS_LAYOUTRET_ON_ERROR = 1 < < 1 ,
PNFS_READ_WHOLE_PAGE = 1 < < 2 ,
PNFS_LAYOUTGET_ON_OPEN = 1 < < 3 ,
} ;
enum pnfs_layout_destroy_mode {
PNFS_LAYOUT_INVALIDATE = 0 ,
PNFS_LAYOUT_BULK_RETURN ,
PNFS_LAYOUT_FILE_BULK_RETURN ,
} ;
struct nfs4_deviceid_node ;
/ * Per - layout driver specific registration structure * /
struct pnfs_layoutdriver_type {
struct list_head pnfs_tblid ;
const u32 id ;
const char * name ;
struct module * owner ;
unsigned flags ;
unsigned max_layoutget_response ;
int ( * set_layoutdriver ) ( struct nfs_server * , const struct nfs_fh * ) ;
int ( * clear_layoutdriver ) ( struct nfs_server * ) ;
struct pnfs_layout_hdr * ( * alloc_layout_hdr ) ( struct inode * inode , gfp_t gfp_flags ) ;
void ( * free_layout_hdr ) ( struct pnfs_layout_hdr * ) ;
struct pnfs_layout_segment * ( * alloc_lseg ) ( struct pnfs_layout_hdr * layoutid , struct nfs4_layoutget_res * lgr , gfp_t gfp_flags ) ;
void ( * free_lseg ) ( struct pnfs_layout_segment * lseg ) ;
void ( * add_lseg ) ( struct pnfs_layout_hdr * layoutid ,
struct pnfs_layout_segment * lseg ,
struct list_head * free_me ) ;
void ( * return_range ) ( struct pnfs_layout_hdr * lo ,
struct pnfs_layout_range * range ) ;
/ * test for nfs page cache coalescing * /
const struct nfs_pageio_ops * pg_read_ops ;
const struct nfs_pageio_ops * pg_write_ops ;
struct pnfs_ds_commit_info * ( * get_ds_info ) ( struct inode * inode ) ;
int ( * sync ) ( struct inode * inode , bool datasync ) ;
/ *
* Return PNFS_ATTEMPTED to indicate the layout code has attempted
* I / O , else return PNFS_NOT_ATTEMPTED to fall back to normal NFS
* /
enum pnfs_try_status ( * read_pagelist ) ( struct nfs_pgio_header * ) ;
enum pnfs_try_status ( * write_pagelist ) ( struct nfs_pgio_header * , int ) ;
void ( * free_deviceid_node ) ( struct nfs4_deviceid_node * ) ;
struct nfs4_deviceid_node * ( * alloc_deviceid_node )
( struct nfs_server * server , struct pnfs_device * pdev ,
gfp_t gfp_flags ) ;
int ( * prepare_layoutreturn ) ( struct nfs4_layoutreturn_args * ) ;
void ( * cleanup_layoutcommit ) ( struct nfs4_layoutcommit_data * data ) ;
int ( * prepare_layoutcommit ) ( struct nfs4_layoutcommit_args * args ) ;
int ( * prepare_layoutstats ) ( struct nfs42_layoutstat_args * args ) ;
void ( * cancel_io ) ( struct pnfs_layout_segment * lseg ) ;
} ;
struct pnfs_commit_ops {
void ( * setup_ds_info ) ( struct pnfs_ds_commit_info * ,
struct pnfs_layout_segment * ) ;
void ( * release_ds_info ) ( struct pnfs_ds_commit_info * ,
struct inode * inode ) ;
int ( * commit_pagelist ) ( struct inode * inode ,
struct list_head * mds_pages ,
int how ,
struct nfs_commit_info * cinfo ) ;
void ( * mark_request_commit ) ( struct nfs_page * req ,
struct pnfs_layout_segment * lseg ,
struct nfs_commit_info * cinfo ,
u32 ds_commit_idx ) ;
void ( * clear_request_commit ) ( struct nfs_page * req ,
struct nfs_commit_info * cinfo ) ;
int ( * scan_commit_lists ) ( struct nfs_commit_info * cinfo ,
int max ) ;
void ( * recover_commit_reqs ) ( struct list_head * list ,
struct nfs_commit_info * cinfo ) ;
} ;
struct pnfs_layout_hdr {
refcount_t plh_refcount ;
atomic_t plh_outstanding ; / * number of RPCs out * /
struct list_head plh_layouts ; / * other client layouts * /
struct list_head plh_bulk_destroy ;
struct list_head plh_segs ; / * layout segments list * /
struct list_head plh_return_segs ; / * invalid layout segments * /
unsigned long plh_block_lgets ; / * block LAYOUTGET if > 0 * /
unsigned long plh_retry_timestamp ;
unsigned long plh_flags ;
nfs4_stateid plh_stateid ;
u32 plh_barrier ; / * ignore lower seqids * /
u32 plh_return_seq ;
enum pnfs_iomode plh_return_iomode ;
loff_t plh_lwb ; / * last write byte for layoutcommit * /
const struct cred * plh_lc_cred ; / * layoutcommit cred * /
struct inode * plh_inode ;
struct rcu_head plh_rcu ;
} ;
struct pnfs_device {
struct nfs4_deviceid dev_id ;
unsigned int layout_type ;
unsigned int mincount ;
unsigned int maxcount ; / * gdia_maxcount * /
struct page * * pages ;
unsigned int pgbase ;
unsigned int pglen ; / * reply buffer length * /
unsigned char nocache : 1 ; / * May not be cached * /
} ;
# define NFS4_PNFS_GETDEVLIST_MAXNUM 16
struct pnfs_devicelist {
unsigned int eof ;
unsigned int num_devs ;
struct nfs4_deviceid dev_id [ NFS4_PNFS_GETDEVLIST_MAXNUM ] ;
} ;
extern int pnfs_register_layoutdriver ( struct pnfs_layoutdriver_type * ) ;
extern void pnfs_unregister_layoutdriver ( struct pnfs_layoutdriver_type * ) ;
extern const struct pnfs_layoutdriver_type * pnfs_find_layoutdriver ( u32 id ) ;
extern void pnfs_put_layoutdriver ( const struct pnfs_layoutdriver_type * ld ) ;
/ * nfs4proc . c * /
# define PNFS_FL_LAYOUTRETURN_ASYNC ( 1 U < < 0 )
# define PNFS_FL_LAYOUTRETURN_PRIVILEGED ( 1 U < < 1 )
extern size_t max_response_pages ( struct nfs_server * server ) ;
extern int nfs4_proc_getdeviceinfo ( struct nfs_server * server ,
struct pnfs_device * dev ,
const struct cred * cred ) ;
extern struct pnfs_layout_segment *
nfs4_proc_layoutget ( struct nfs4_layoutget * lgp ,
struct nfs4_exception * exception ) ;
extern int nfs4_proc_layoutreturn ( struct nfs4_layoutreturn * lrp ,
unsigned int flags ) ;
/ * pnfs . c * /
void pnfs_get_layout_hdr ( struct pnfs_layout_hdr * lo ) ;
void pnfs_put_lseg ( struct pnfs_layout_segment * lseg ) ;
void set_pnfs_layoutdriver ( struct nfs_server * , const struct nfs_fh * , struct nfs_fsinfo * ) ;
void unset_pnfs_layoutdriver ( struct nfs_server * ) ;
void pnfs_generic_pg_check_layout ( struct nfs_pageio_descriptor * pgio , struct nfs_page * req ) ;
void pnfs_generic_pg_init_read ( struct nfs_pageio_descriptor * , struct nfs_page * ) ;
int pnfs_generic_pg_readpages ( struct nfs_pageio_descriptor * desc ) ;
void pnfs_generic_pg_init_write ( struct nfs_pageio_descriptor * pgio ,
struct nfs_page * req , u64 wb_size ) ;
void pnfs_generic_pg_cleanup ( struct nfs_pageio_descriptor * ) ;
int pnfs_generic_pg_writepages ( struct nfs_pageio_descriptor * desc ) ;
size_t pnfs_generic_pg_test ( struct nfs_pageio_descriptor * pgio ,
struct nfs_page * prev , struct nfs_page * req ) ;
void pnfs_set_lo_fail ( struct pnfs_layout_segment * lseg ) ;
struct pnfs_layout_segment * pnfs_layout_process ( struct nfs4_layoutget * lgp ) ;
void pnfs_layoutget_free ( struct nfs4_layoutget * lgp ) ;
void pnfs_free_lseg_list ( struct list_head * tmp_list ) ;
void pnfs_destroy_layout ( struct nfs_inode * ) ;
void pnfs_destroy_layout_final ( struct nfs_inode * ) ;
void pnfs_destroy_all_layouts ( struct nfs_client * ) ;
int pnfs_layout_destroy_byfsid ( struct nfs_client * clp , struct nfs_fsid * fsid ,
enum pnfs_layout_destroy_mode mode ) ;
int pnfs_layout_destroy_byclid ( struct nfs_client * clp ,
enum pnfs_layout_destroy_mode mode ) ;
bool nfs4_layout_refresh_old_stateid ( nfs4_stateid * dst ,
struct pnfs_layout_range * dst_range ,
struct inode * inode ) ;
void pnfs_put_layout_hdr ( struct pnfs_layout_hdr * lo ) ;
void pnfs_set_layout_stateid ( struct pnfs_layout_hdr * lo ,
const nfs4_stateid * new ,
const struct cred * cred ,
bool update_barrier ) ;
int pnfs_mark_matching_lsegs_invalid ( struct pnfs_layout_hdr * lo ,
struct list_head * tmp_list ,
const struct pnfs_layout_range * recall_range ,
u32 seq ) ;
int pnfs_mark_matching_lsegs_return ( struct pnfs_layout_hdr * lo ,
struct list_head * tmp_list ,
const struct pnfs_layout_range * recall_range ,
u32 seq ) ;
int pnfs_mark_layout_stateid_invalid ( struct pnfs_layout_hdr * lo ,
struct list_head * lseg_list ) ;
bool pnfs_roc ( struct inode * ino ,
struct nfs4_layoutreturn_args * args ,
struct nfs4_layoutreturn_res * res ,
const struct cred * cred ) ;
int pnfs_roc_done ( struct rpc_task * task , struct nfs4_layoutreturn_args * * argpp ,
struct nfs4_layoutreturn_res * * respp , int * ret ) ;
void pnfs_roc_release ( struct nfs4_layoutreturn_args * args ,
struct nfs4_layoutreturn_res * res ,
int ret ) ;
bool pnfs_wait_on_layoutreturn ( struct inode * ino , struct rpc_task * task ) ;
void pnfs_set_layoutcommit ( struct inode * , struct pnfs_layout_segment * , loff_t ) ;
void pnfs_cleanup_layoutcommit ( struct nfs4_layoutcommit_data * data ) ;
int pnfs_layoutcommit_inode ( struct inode * inode , bool sync ) ;
int pnfs_generic_sync ( struct inode * inode , bool datasync ) ;
int pnfs_nfs_generic_sync ( struct inode * inode , bool datasync ) ;
int _ pnfs_return_layout ( struct inode * ) ;
int pnfs_commit_and_return_layout ( struct inode * ) ;
void pnfs_ld_write_done ( struct nfs_pgio_header * ) ;
void pnfs_ld_read_done ( struct nfs_pgio_header * ) ;
void pnfs_read_resend_pnfs ( struct nfs_pgio_header * , unsigned int mirror_idx ) ;
struct pnfs_layout_segment * pnfs_update_layout ( struct inode * ino ,
struct nfs_open_context * ctx ,
loff_t pos ,
u64 count ,
enum pnfs_iomode iomode ,
bool strict_iomode ,
gfp_t gfp_flags ) ;
void pnfs_layoutreturn_retry_later ( struct pnfs_layout_hdr * lo ,
const nfs4_stateid * arg_stateid ,
const struct pnfs_layout_range * range ) ;
void pnfs_layoutreturn_free_lsegs ( struct pnfs_layout_hdr * lo ,
const nfs4_stateid * arg_stateid ,
const struct pnfs_layout_range * range ,
const nfs4_stateid * stateid ) ;
void pnfs_generic_layout_insert_lseg ( struct pnfs_layout_hdr * lo ,
struct pnfs_layout_segment * lseg ,
bool ( * is_after ) ( const struct pnfs_layout_range * lseg_range ,
const struct pnfs_layout_range * old ) ,
bool ( * do_merge ) ( struct pnfs_layout_segment * lseg ,
struct pnfs_layout_segment * old ) ,
struct list_head * free_me ) ;
void nfs4_deviceid_mark_client_invalid ( struct nfs_client * clp ) ;
int pnfs_read_done_resend_to_mds ( struct nfs_pgio_header * ) ;
int pnfs_write_done_resend_to_mds ( struct nfs_pgio_header * ) ;
struct nfs4_threshold * pnfs_mdsthreshold_alloc ( void ) ;
void pnfs_error_mark_layout_for_return ( struct inode * inode ,
struct pnfs_layout_segment * lseg ) ;
void pnfs_layout_return_unused_byclid ( struct nfs_client * clp ,
enum pnfs_iomode iomode ) ;
int pnfs_layout_handle_reboot ( struct nfs_client * clp ) ;
/ * nfs4_deviceid_flags * /
enum {
NFS_DEVICEID_INVALID = 0 , / * set when MDS clientid recalled * /
NFS_DEVICEID_UNAVAILABLE , / * device temporarily unavailable * /
NFS_DEVICEID_NOCACHE , / * device may not be cached * /
} ;
/ * pnfs_dev . c * /
struct nfs4_deviceid_node {
struct hlist_node node ;
struct hlist_node tmpnode ;
const struct pnfs_layoutdriver_type * ld ;
const struct nfs_client * nfs_client ;
unsigned long flags ;
unsigned long timestamp_unavailable ;
struct nfs4_deviceid deviceid ;
struct rcu_head rcu ;
atomic_t ref ;
} ;
struct nfs4_deviceid_node *
nfs4_find_get_deviceid ( struct nfs_server * server ,
const struct nfs4_deviceid * id , const struct cred * cred ,
gfp_t gfp_mask ) ;
void nfs4_delete_deviceid ( const struct pnfs_layoutdriver_type * , const struct nfs_client * , const struct nfs4_deviceid * ) ;
void nfs4_init_deviceid_node ( struct nfs4_deviceid_node * , struct nfs_server * ,
const struct nfs4_deviceid * ) ;
bool nfs4_put_deviceid_node ( struct nfs4_deviceid_node * ) ;
void nfs4_mark_deviceid_available ( struct nfs4_deviceid_node * node ) ;
void nfs4_mark_deviceid_unavailable ( struct nfs4_deviceid_node * node ) ;
bool nfs4_test_deviceid_unavailable ( struct nfs4_deviceid_node * node ) ;
void nfs4_deviceid_purge_client ( const struct nfs_client * ) ;
/ * pnfs_nfs . c * /
struct pnfs_commit_array * pnfs_alloc_commit_array ( size_t n , gfp_t gfp_flags ) ;
void pnfs_free_commit_array ( struct pnfs_commit_array * p ) ;
struct pnfs_commit_array * pnfs_add_commit_array ( struct pnfs_ds_commit_info * ,
struct pnfs_commit_array * ,
struct pnfs_layout_segment * ) ;
void pnfs_generic_ds_cinfo_release_lseg ( struct pnfs_ds_commit_info * fl_cinfo ,
struct pnfs_layout_segment * lseg ) ;
void pnfs_generic_ds_cinfo_destroy ( struct pnfs_ds_commit_info * fl_cinfo ) ;
void pnfs_generic_clear_request_commit ( struct nfs_page * req ,
struct nfs_commit_info * cinfo ) ;
void pnfs_generic_commit_release ( void * calldata ) ;
void pnfs_generic_prepare_to_resend_writes ( struct nfs_commit_data * data ) ;
void pnfs_generic_rw_release ( void * data ) ;
void pnfs_generic_recover_commit_reqs ( struct list_head * dst ,
struct nfs_commit_info * cinfo ) ;
int pnfs_generic_commit_pagelist ( struct inode * inode ,
struct list_head * mds_pages ,
int how ,
struct nfs_commit_info * cinfo ,
int ( * initiate_commit ) ( struct nfs_commit_data * data ,
int how ) ) ;
int pnfs_generic_scan_commit_lists ( struct nfs_commit_info * cinfo , int max ) ;
void pnfs_generic_write_commit_done ( struct rpc_task * task , void * data ) ;
void nfs4_pnfs_ds_put ( struct nfs4_pnfs_ds * ds ) ;
struct nfs4_pnfs_ds * nfs4_pnfs_ds_add ( const struct net * net ,
struct list_head * dsaddrs ,
gfp_t gfp_flags ) ;
void nfs4_pnfs_v3_ds_connect_unload ( void ) ;
int nfs4_pnfs_ds_connect ( struct nfs_server * mds_srv , struct nfs4_pnfs_ds * ds ,
struct nfs4_deviceid_node * devid , unsigned int timeo ,
unsigned int retrans , u32 version , u32 minor_version ) ;
struct nfs4_pnfs_ds_addr * nfs4_decode_mp_ds_addr ( struct net * net ,
struct xdr_stream * xdr ,
gfp_t gfp_flags ) ;
void pnfs_layout_mark_request_commit ( struct nfs_page * req ,
struct pnfs_layout_segment * lseg ,
struct nfs_commit_info * cinfo ,
u32 ds_commit_idx ) ;
void pnfs_lgopen_prepare ( struct nfs4_opendata * data ,
struct nfs_open_context * ctx ) ;
void pnfs_parse_lgopen ( struct inode * ino , struct nfs4_layoutget * lgp ,
struct nfs_open_context * ctx ) ;
void nfs4_lgopen_release ( struct nfs4_layoutget * lgp ) ;
static inline bool nfs_have_layout ( struct inode * inode )
{
return NFS_I ( inode ) - > layout ! = NULL ;
}
static inline bool pnfs_layout_is_valid ( const struct pnfs_layout_hdr * lo )
{
return test_bit ( NFS_LAYOUT_INVALID_STID , & lo - > plh_flags ) = = 0 ;
}
static inline struct nfs4_deviceid_node *
nfs4_get_deviceid ( struct nfs4_deviceid_node * d )
{
atomic_inc ( & d - > ref ) ;
return d ;
}
static inline struct pnfs_layout_segment *
pnfs_get_lseg ( struct pnfs_layout_segment * lseg )
{
if ( lseg ) {
refcount_inc ( & lseg - > pls_refcount ) ;
smp_mb__after_atomic ( ) ;
}
return lseg ;
}
static inline bool
pnfs_is_valid_lseg ( struct pnfs_layout_segment * lseg )
{
return test_bit ( NFS_LSEG_VALID , & lseg - > pls_flags ) ! = 0 ;
}
/ * Return true if a layout driver is being used for this mountpoint * /
static inline int pnfs_enabled_sb ( struct nfs_server * nfss )
{
return nfss - > pnfs_curr_ld ! = NULL ;
}
static inline int
pnfs_commit_list ( struct inode * inode , struct list_head * mds_pages , int how ,
struct nfs_commit_info * cinfo )
{
struct pnfs_ds_commit_info * fl_cinfo = cinfo - > ds ;
if ( fl_cinfo = = NULL | | fl_cinfo - > ncommitting = = 0 )
return PNFS_NOT_ATTEMPTED ;
return fl_cinfo - > ops - > commit_pagelist ( inode , mds_pages , how , cinfo ) ;
}
static inline struct pnfs_ds_commit_info *
pnfs_get_ds_info ( struct inode * inode )
{
struct pnfs_layoutdriver_type * ld = NFS_SERVER ( inode ) - > pnfs_curr_ld ;
if ( ld = = NULL | | ld - > get_ds_info = = NULL )
return NULL ;
return ld - > get_ds_info ( inode ) ;
}
static inline void
pnfs_init_ds_commit_info_ops ( struct pnfs_ds_commit_info * fl_cinfo , struct inode * inode )
{
struct pnfs_ds_commit_info * inode_cinfo = pnfs_get_ds_info ( inode ) ;
if ( inode_cinfo ! = NULL )
fl_cinfo - > ops = inode_cinfo - > ops ;
}
static inline void
pnfs_init_ds_commit_info ( struct pnfs_ds_commit_info * fl_cinfo )
{
INIT_LIST_HEAD ( & fl_cinfo - > commits ) ;
fl_cinfo - > ops = NULL ;
}
static inline void
pnfs_release_ds_info ( struct pnfs_ds_commit_info * fl_cinfo , struct inode * inode )
{
if ( fl_cinfo - > ops ! = NULL & & fl_cinfo - > ops - > release_ds_info ! = NULL )
fl_cinfo - > ops - > release_ds_info ( fl_cinfo , inode ) ;
}
static inline void
pnfs_generic_mark_devid_invalid ( struct nfs4_deviceid_node * node )
{
set_bit ( NFS_DEVICEID_INVALID , & node - > flags ) ;
}
static inline bool
pnfs_mark_request_commit ( struct nfs_page * req , struct pnfs_layout_segment * lseg ,
struct nfs_commit_info * cinfo , u32 ds_commit_idx )
{
struct pnfs_ds_commit_info * fl_cinfo = cinfo - > ds ;
if ( ! lseg | | ! fl_cinfo - > ops | | ! fl_cinfo - > ops - > mark_request_commit )
return false ;
fl_cinfo - > ops - > mark_request_commit ( req , lseg , cinfo , ds_commit_idx ) ;
return true ;
}
static inline bool
pnfs_clear_request_commit ( struct nfs_page * req , struct nfs_commit_info * cinfo )
{
struct pnfs_ds_commit_info * fl_cinfo = cinfo - > ds ;
if ( ! fl_cinfo | | ! fl_cinfo - > ops | | ! fl_cinfo - > ops - > clear_request_commit )
return false ;
fl_cinfo - > ops - > clear_request_commit ( req , cinfo ) ;
return true ;
}
static inline int
pnfs_scan_commit_lists ( struct inode * inode , struct nfs_commit_info * cinfo ,
int max )
{
struct pnfs_ds_commit_info * fl_cinfo = cinfo - > ds ;
if ( ! fl_cinfo | | fl_cinfo - > nwritten = = 0 )
return 0 ;
return fl_cinfo - > ops - > scan_commit_lists ( cinfo , max ) ;
}
static inline void
pnfs_recover_commit_reqs ( struct list_head * head , struct nfs_commit_info * cinfo )
{
struct pnfs_ds_commit_info * fl_cinfo = cinfo - > ds ;
if ( fl_cinfo & & fl_cinfo - > nwritten ! = 0 )
fl_cinfo - > ops - > recover_commit_reqs ( head , cinfo ) ;
}
/ * Should the pNFS client commit and return the layout upon a setattr * /
static inline bool
pnfs_ld_layoutret_on_setattr ( struct inode * inode )
{
if ( ! pnfs_enabled_sb ( NFS_SERVER ( inode ) ) )
return false ;
return NFS_SERVER ( inode ) - > pnfs_curr_ld - > flags &
PNFS_LAYOUTRET_ON_SETATTR ;
}
static inline bool
pnfs_ld_read_whole_page ( struct inode * inode )
{
if ( ! pnfs_enabled_sb ( NFS_SERVER ( inode ) ) )
return false ;
return NFS_SERVER ( inode ) - > pnfs_curr_ld - > flags & PNFS_READ_WHOLE_PAGE ;
}
static inline int
pnfs_sync_inode ( struct inode * inode , bool datasync )
{
if ( ! pnfs_enabled_sb ( NFS_SERVER ( inode ) ) )
return 0 ;
return NFS_SERVER ( inode ) - > pnfs_curr_ld - > sync ( inode , datasync ) ;
}
static inline bool
pnfs_layoutcommit_outstanding ( struct inode * inode )
{
struct nfs_inode * nfsi = NFS_I ( inode ) ;
return test_bit ( NFS_INO_LAYOUTCOMMIT , & nfsi - > flags ) ! = 0 | |
test_bit ( NFS_INO_LAYOUTCOMMITTING , & nfsi - > flags ) ! = 0 ;
}
static inline int pnfs_return_layout ( struct inode * ino )
{
struct nfs_inode * nfsi = NFS_I ( ino ) ;
struct nfs_server * nfss = NFS_SERVER ( ino ) ;
if ( pnfs_enabled_sb ( nfss ) & & nfsi - > layout ) {
set_bit ( NFS_LAYOUT_RETURN_REQUESTED , & nfsi - > layout - > plh_flags ) ;
return _ pnfs_return_layout ( ino ) ;
}
return 0 ;
}
static inline bool
pnfs_use_threshold ( struct nfs4_threshold * * dst , struct nfs4_threshold * src ,
struct nfs_server * nfss )
{
return ( dst & & src & & src - > bm ! = 0 & & nfss - > pnfs_curr_ld & >&
nfss - > pnfs_curr_ld - > id = = src - > l_type ) ;
}
static inline u64
pnfs_calc_offset_end ( u64 offset , u64 len )
{
if ( len = = NFS4_MAX_UINT64 | | len > = NFS4_MAX_UINT64 - offset )
return NFS4_MAX_UINT64 ;
return offset + len - 1 ;
}
static inline u64
pnfs_calc_offset_length ( u64 offset , u64 end )
{
if ( end = = NFS4_MAX_UINT64 | | end < = offset )
return NFS4_MAX_UINT64 ;
return 1 + end - offset ;
}
static inline void
pnfs_copy_range ( struct pnfs_layout_range * dst ,
const struct pnfs_layout_range * src )
{
memcpy ( dst , src , sizeof ( * dst ) ) ;
}
static inline u64
pnfs_end_offset ( u64 start , u64 len )
{
if ( NFS4_MAX_UINT64 - start < = len )
return NFS4_MAX_UINT64 ;
return start + len ;
}
/ *
* Are 2 ranges intersecting ?
* start1 end1
* [ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - )
* start2 end2
* [ - - - - - - - - - - - - - - - - )
* /
static inline bool
pnfs_is_range_intersecting ( u64 start1 , u64 end1 , u64 start2 , u64 end2 )
{
return ( end1 = = NFS4_MAX_UINT64 | | start2 < end1 ) & &
( end2 = = NFS4_MAX_UINT64 | | start1 < end2 ) ;
}
static inline bool
pnfs_lseg_range_intersecting ( const struct pnfs_layout_range * l1 ,
const struct pnfs_layout_range * l2 )
{
u64 end1 = pnfs_end_offset ( l1 - > offset , l1 - > length ) ;
u64 end2 = pnfs_end_offset ( l2 - > offset , l2 - > length ) ;
return pnfs_is_range_intersecting ( l1 - > offset , end1 , l2 - > offset , end2 ) ;
}
static inline bool
pnfs_lseg_request_intersecting ( struct pnfs_layout_segment * lseg , struct nfs_page * req )
{
u64 seg_last = pnfs_end_offset ( lseg - > pls_range . offset , lseg - > pls_range . length ) ;
u64 req_last = req_offset ( req ) + req - > wb_bytes ;
return pnfs_is_range_intersecting ( lseg - > pls_range . offset , seg_last ,
req_offset ( req ) , req_last ) ;
}
static inline void pnfs_lseg_cancel_io ( struct nfs_server * server ,
struct pnfs_layout_segment * lseg )
{
if ( server - > pnfs_curr_ld - > cancel_io )
server - > pnfs_curr_ld - > cancel_io ( lseg ) ;
}
extern unsigned int layoutstats_timer ;
# ifdef NFS_DEBUG
void nfs4_print_deviceid ( const struct nfs4_deviceid * dev_id ) ;
# else
static inline void nfs4_print_deviceid ( const struct nfs4_deviceid * dev_id )
{
}
# endif / * NFS_DEBUG * /
# else / * CONFIG_NFS_V4_1 * /
static inline bool nfs_have_layout ( struct inode * inode )
{
return false ;
}
static inline void pnfs_destroy_all_layouts ( struct nfs_client * clp )
{
}
static inline void pnfs_destroy_layout ( struct nfs_inode * nfsi )
{
}
static inline void pnfs_destroy_layout_final ( struct nfs_inode * nfsi )
{
}
static inline int pnfs_layout_handle_reboot ( struct nfs_client * clp )
{
return 0 ;
}
static inline struct pnfs_layout_segment *
pnfs_get_lseg ( struct pnfs_layout_segment * lseg )
{
return NULL ;
}
static inline void pnfs_put_lseg ( struct pnfs_layout_segment * lseg )
{
}
static inline int pnfs_return_layout ( struct inode * ino )
{
return 0 ;
}
static inline int pnfs_commit_and_return_layout ( struct inode * inode )
{
return 0 ;
}
static inline bool
pnfs_ld_layoutret_on_setattr ( struct inode * inode )
{
return false ;
}
static inline bool
pnfs_ld_read_whole_page ( struct inode * inode )
{
return false ;
}
static inline int
pnfs_sync_inode ( struct inode * inode , bool datasync )
{
return 0 ;
}
static inline bool
pnfs_layoutcommit_outstanding ( struct inode * inode )
{
return false ;
}
static inline bool
pnfs_roc ( struct inode * ino ,
struct nfs4_layoutreturn_args * args ,
struct nfs4_layoutreturn_res * res ,
const struct cred * cred )
{
return false ;
}
static inline int
pnfs_roc_done ( struct rpc_task * task ,
struct nfs4_layoutreturn_args * * argpp ,
struct nfs4_layoutreturn_res * * respp ,
int * ret )
{
return 0 ;
}
static inline void
pnfs_roc_release ( struct nfs4_layoutreturn_args * args ,
struct nfs4_layoutreturn_res * res ,
int ret )
{
}
static inline bool
pnfs_wait_on_layoutreturn ( struct inode * ino , struct rpc_task * task )
{
return false ;
}
static inline void set_pnfs_layoutdriver ( struct nfs_server * s ,
const struct nfs_fh * mntfh ,
struct nfs_fsinfo * fsinfo )
{
}
static inline void unset_pnfs_layoutdriver ( struct nfs_server * s )
{
}
static inline int
pnfs_commit_list ( struct inode * inode , struct list_head * mds_pages , int how ,
struct nfs_commit_info * cinfo )
{
return PNFS_NOT_ATTEMPTED ;
}
static inline struct pnfs_ds_commit_info *
pnfs_get_ds_info ( struct inode * inode )
{
return NULL ;
}
static inline void
pnfs_init_ds_commit_info_ops ( struct pnfs_ds_commit_info * fl_cinfo , struct inode * inode )
{
}
static inline void
pnfs_init_ds_commit_info ( struct pnfs_ds_commit_info * fl_cinfo )
{
}
static inline void
pnfs_release_ds_info ( struct pnfs_ds_commit_info * fl_cinfo , struct inode * inode )
{
}
static inline bool
pnfs_mark_request_commit ( struct nfs_page * req , struct pnfs_layout_segment * lseg ,
struct nfs_commit_info * cinfo , u32 ds_commit_idx )
{
return false ;
}
static inline bool
pnfs_clear_request_commit ( struct nfs_page * req , struct nfs_commit_info * cinfo )
{
return false ;
}
static inline int
pnfs_scan_commit_lists ( struct inode * inode , struct nfs_commit_info * cinfo ,
int max )
{
return 0 ;
}
static inline void
pnfs_recover_commit_reqs ( struct list_head * head , struct nfs_commit_info * cinfo )
{
}
static inline int pnfs_layoutcommit_inode ( struct inode * inode , bool sync )
{
return 0 ;
}
static inline bool
pnfs_use_threshold ( struct nfs4_threshold * * dst , struct nfs4_threshold * src ,
struct nfs_server * nfss )
{
return false ;
}
static inline struct nfs4_threshold * pnfs_mdsthreshold_alloc ( void )
{
return NULL ;
}
static inline void nfs4_pnfs_v3_ds_connect_unload ( void )
{
}
static inline bool nfs4_layout_refresh_old_stateid ( nfs4_stateid * dst ,
struct pnfs_layout_range * dst_range ,
struct inode * inode )
{
return false ;
}
static inline void pnfs_lgopen_prepare ( struct nfs4_opendata * data ,
struct nfs_open_context * ctx )
{
}
static inline void pnfs_parse_lgopen ( struct inode * ino ,
struct nfs4_layoutget * lgp ,
struct nfs_open_context * ctx )
{
}
static inline void nfs4_lgopen_release ( struct nfs4_layoutget * lgp )
{
}
static inline bool pnfs_layout_is_valid ( const struct pnfs_layout_hdr * lo )
{
return false ;
}
# endif / * CONFIG_NFS_V4_1 * /
# if IS_ENABLED ( CONFIG_NFS_V4_2 )
int pnfs_report_layoutstat ( struct inode * inode , gfp_t gfp_flags ) ;
# else
static inline int
pnfs_report_layoutstat ( struct inode * inode , gfp_t gfp_flags )
{
return 0 ;
}
# endif
# endif / * FS_NFS_PNFS_H * /
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