| /* |
| * 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 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) |
| |
| /* error codes for internal use */ |
| #define NFS4ERR_RESET_TO_MDS 12001 |
| #define NFS4ERR_RESET_TO_PNFS 12002 |
| |
| 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 */ |
| }; |
| |
| 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; |
| |
| 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); |
| 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); |
| int (*commit_pagelist)(struct inode *inode, |
| struct list_head *mds_pages, |
| int how, |
| struct nfs_commit_info *cinfo); |
| |
| 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_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 */ |
| struct rpc_cred *plh_lc_cred; /* layoutcommit cred */ |
| struct inode *plh_inode; |
| }; |
| |
| 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 *); |
| |
| /* 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, |
| struct rpc_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_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_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_refresh_layout_stateid(nfs4_stateid *dst, 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, |
| 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 rpc_cred *cred); |
| 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 *); |
| 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); |
| /* 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, struct rpc_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_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 */ |
| 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(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) |
| { |
| if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0) |
| return PNFS_NOT_ATTEMPTED; |
| return NFS_SERVER(inode)->pnfs_curr_ld->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_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 inode *inode = d_inode(req->wb_context->dentry); |
| struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
| |
| if (lseg == NULL || ld->mark_request_commit == NULL) |
| return false; |
| ld->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 inode *inode = d_inode(req->wb_context->dentry); |
| struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
| |
| if (ld == NULL || ld->clear_request_commit == NULL) |
| return false; |
| ld->clear_request_commit(req, cinfo); |
| return true; |
| } |
| |
| static inline int |
| pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, |
| int max) |
| { |
| if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) |
| return 0; |
| else |
| return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max); |
| } |
| |
| static inline struct nfs_page * |
| pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, |
| struct page *page) |
| { |
| struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
| |
| if (ld == NULL || ld->search_commit_reqs == NULL) |
| return NULL; |
| return ld->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 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 rpc_cred *cred) |
| { |
| return false; |
| } |
| |
| 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 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 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_refresh_layout_stateid(nfs4_stateid *dst, |
| 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) |
| { |
| } |
| |
| #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 */ |