Orange Pi5 kernel

/*
 *  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_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 */
};
 
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;
<------>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,
};
 
/* error codes for internal use */
#define NFS4ERR_RESET_TO_MDS   12001
#define NFS4ERR_RESET_TO_PNFS  12002
 
#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 */
};
 
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,
};
 
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_deviceinfo_size;
<------>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);
};
 
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 nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo,
<------><------><------><------><------><------>struct page *page);
};
 
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 */
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, long *timeout);
extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync);
 
/* 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);
void pnfs_generic_pg_check_range(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_destroy_layouts_byfsid(struct nfs_client *clp,
<------><------>struct nfs_fsid *fsid,
<------><------>bool is_recall);
int pnfs_destroy_layouts_byclid(struct nfs_client *clp,
<------><------>bool is_recall);
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_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);
 
/* 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);
struct nfs_page *pnfs_generic_search_commit_reqs(struct nfs_commit_info *cinfo,
<------><------><------><------><------><------> struct page *page);
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(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);
}
 
static inline struct nfs_page *
pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
<------><------><------>struct page *page)
{
<------>struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
 
<------>if (!fl_cinfo->ops || !fl_cinfo->ops->search_commit_reqs)
<------><------>return NULL;
<------>return fl_cinfo->ops->search_commit_reqs(cinfo, page);
}
 
/* 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);
}
 
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 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 struct nfs_page *
pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
<------><------><------>struct page *page)
{
<------>return NULL;
}
 
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 */