diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/nfs/pnfs.h')
| -rw-r--r-- | ANDROID_3.4.5/fs/nfs/pnfs.h | 440 |
1 files changed, 0 insertions, 440 deletions
diff --git a/ANDROID_3.4.5/fs/nfs/pnfs.h b/ANDROID_3.4.5/fs/nfs/pnfs.h deleted file mode 100644 index 442ebf68..00000000 --- a/ANDROID_3.4.5/fs/nfs/pnfs.h +++ /dev/null @@ -1,440 +0,0 @@ -/* - * 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/nfs_fs.h> -#include <linux/nfs_page.h> - -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 */ -}; - -struct pnfs_layout_segment { - struct list_head pls_list; - struct list_head pls_lc_list; - struct pnfs_layout_range pls_range; - atomic_t pls_refcount; - unsigned long pls_flags; - struct pnfs_layout_hdr *pls_layout; -}; - -enum pnfs_try_status { - PNFS_ATTEMPTED = 0, - PNFS_NOT_ATTEMPTED = 1, -}; - -#ifdef CONFIG_NFS_V4_1 - -#define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" - -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_ROC, /* some lseg had roc bit set */ - NFS_LAYOUT_DESTROYED, /* no new use of layout allowed */ -}; - -enum layoutdriver_policy_flags { - /* Should the pNFS client commit and return the layout upon a setattr */ - PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, - PNFS_LAYOUTRET_ON_ERROR = 1 << 1, -}; - -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; - - 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); - - /* test for nfs page cache coalescing */ - const struct nfs_pageio_ops *pg_read_ops; - const struct nfs_pageio_ops *pg_write_ops; - - void (*mark_request_commit) (struct nfs_page *req, - struct pnfs_layout_segment *lseg); - void (*clear_request_commit) (struct nfs_page *req); - int (*scan_commit_lists) (struct inode *inode, int max, spinlock_t *lock); - int (*commit_pagelist)(struct inode *inode, struct list_head *mds_pages, int how); - - /* - * 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_read_data *nfs_data); - enum pnfs_try_status (*write_pagelist) (struct nfs_write_data *nfs_data, int how); - - void (*free_deviceid_node) (struct nfs4_deviceid_node *); - - void (*encode_layoutreturn) (struct pnfs_layout_hdr *layoutid, - struct xdr_stream *xdr, - const struct nfs4_layoutreturn_args *args); - - void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); - - void (*encode_layoutcommit) (struct pnfs_layout_hdr *layoutid, - struct xdr_stream *xdr, - const struct nfs4_layoutcommit_args *args); -}; - -struct pnfs_layout_hdr { - atomic_t plh_refcount; - struct list_head plh_layouts; /* other client layouts */ - struct list_head plh_bulk_recall; /* clnt list of bulk recalls */ - struct list_head plh_segs; /* layout segments list */ - nfs4_stateid plh_stateid; - atomic_t plh_outstanding; /* number of RPCs out */ - unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ - u32 plh_barrier; /* ignore lower seqids */ - unsigned long plh_flags; - 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; - struct page **pages; - unsigned int pgbase; - unsigned int pglen; -}; - -#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 int nfs4_proc_getdevicelist(struct nfs_server *server, - const struct nfs_fh *fh, - struct pnfs_devicelist *devlist); -extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, - struct pnfs_device *dev); -extern int nfs4_proc_layoutget(struct nfs4_layoutget *lgp); -extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp); - -/* pnfs.c */ -void get_layout_hdr(struct pnfs_layout_hdr *lo); -void put_lseg(struct pnfs_layout_segment *lseg); - -bool pnfs_pageio_init_read(struct nfs_pageio_descriptor *, struct inode *); -bool pnfs_pageio_init_write(struct nfs_pageio_descriptor *, struct inode *, int); - -void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32); -void unset_pnfs_layoutdriver(struct nfs_server *); -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 *, struct nfs_page *); -int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); -bool 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); -int pnfs_layout_process(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 *); -void 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_choose_layoutget_stateid(nfs4_stateid *dst, - struct pnfs_layout_hdr *lo, - struct nfs4_state *open_state); -int mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, - struct list_head *tmp_list, - struct pnfs_layout_range *recall_range); -bool pnfs_roc(struct inode *ino); -void pnfs_roc_release(struct inode *ino); -void pnfs_roc_set_barrier(struct inode *ino, u32 barrier); -bool pnfs_roc_drain(struct inode *ino, u32 *barrier); -void pnfs_set_layoutcommit(struct nfs_write_data *wdata); -void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); -int pnfs_layoutcommit_inode(struct inode *inode, bool sync); -int _pnfs_return_layout(struct inode *); -void pnfs_ld_write_done(struct nfs_write_data *); -void pnfs_ld_read_done(struct nfs_read_data *); -struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, - struct nfs_open_context *ctx, - loff_t pos, - u64 count, - enum pnfs_iomode iomode, - gfp_t gfp_flags); - -void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); - -/* nfs4_deviceid_flags */ -enum { - NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ -}; - -/* 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; - struct nfs4_deviceid deviceid; - atomic_t ref; -}; - -struct nfs4_deviceid_node *nfs4_find_get_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); -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 *, - const struct pnfs_layoutdriver_type *, - const struct nfs_client *, - const struct nfs4_deviceid *); -struct nfs4_deviceid_node *nfs4_insert_deviceid_node(struct nfs4_deviceid_node *); -bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); -void nfs4_deviceid_purge_client(const struct nfs_client *); - -static inline int lo_fail_bit(u32 iomode) -{ - return iomode == IOMODE_RW ? - NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; -} - -static inline struct pnfs_layout_segment * -get_lseg(struct pnfs_layout_segment *lseg) -{ - if (lseg) { - atomic_inc(&lseg->pls_refcount); - smp_mb__after_atomic_inc(); - } - return lseg; -} - -/* 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) -{ - if (!test_and_clear_bit(NFS_INO_PNFS_COMMIT, &NFS_I(inode)->flags)) - return PNFS_NOT_ATTEMPTED; - return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how); -} - -static inline bool -pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg) -{ - struct inode *inode = req->wb_context->dentry->d_inode; - 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); - return true; -} - -static inline bool -pnfs_clear_request_commit(struct nfs_page *req) -{ - struct inode *inode = req->wb_context->dentry->d_inode; - 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); - return true; -} - -static inline int -pnfs_scan_commit_lists(struct inode *inode, int max, spinlock_t *lock) -{ - struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; - int ret; - - if (ld == NULL || ld->scan_commit_lists == NULL) - return 0; - ret = ld->scan_commit_lists(inode, max, lock); - if (ret != 0) - set_bit(NFS_INO_PNFS_COMMIT, &NFS_I(inode)->flags); - return ret; -} - -/* 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 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) - return _pnfs_return_layout(ino); - - return 0; -} - -#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 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 * -get_lseg(struct pnfs_layout_segment *lseg) -{ - return NULL; -} - -static inline void put_lseg(struct pnfs_layout_segment *lseg) -{ -} - -static inline int pnfs_return_layout(struct inode *ino) -{ - return 0; -} - -static inline bool -pnfs_ld_layoutret_on_setattr(struct inode *inode) -{ - return false; -} - -static inline bool -pnfs_roc(struct inode *ino) -{ - return false; -} - -static inline void -pnfs_roc_release(struct inode *ino) -{ -} - -static inline void -pnfs_roc_set_barrier(struct inode *ino, u32 barrier) -{ -} - -static inline bool -pnfs_roc_drain(struct inode *ino, u32 *barrier) -{ - return false; -} - -static inline void set_pnfs_layoutdriver(struct nfs_server *s, - const struct nfs_fh *mntfh, u32 id) -{ -} - -static inline void unset_pnfs_layoutdriver(struct nfs_server *s) -{ -} - -static inline bool pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, struct inode *inode) -{ - return false; -} - -static inline bool pnfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, struct inode *inode, int ioflags) -{ - return false; -} - -static inline int -pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how) -{ - return PNFS_NOT_ATTEMPTED; -} - -static inline bool -pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg) -{ - return false; -} - -static inline bool -pnfs_clear_request_commit(struct nfs_page *req) -{ - return false; -} - -static inline int -pnfs_scan_commit_lists(struct inode *inode, int max, spinlock_t *lock) -{ - return 0; -} - -static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) -{ - return 0; -} - -#endif /* CONFIG_NFS_V4_1 */ - -#endif /* FS_NFS_PNFS_H */ |