/* SPDX-License-Identifier: GPL-2.0-or-later */ /* Internal definitions for network filesystem support * * Copyright (C) 2021 Red Hat, Inc. All Rights Reserved. * Written by David Howells ([email protected]) */ #include <linux/slab.h> #include <linux/seq_file.h> #include <linux/netfs.h> #include <linux/fscache.h> #include <linux/fscache-cache.h> #include <trace/events/netfs.h> #include <trace/events/fscache.h> #ifdef pr_fmt #undef pr_fmt #endif #define pr_fmt(fmt) … /* * buffered_read.c */ void netfs_rreq_unlock_folios(struct netfs_io_request *rreq); int netfs_prefetch_for_write(struct file *file, struct folio *folio, size_t offset, size_t len); /* * io.c */ int netfs_begin_read(struct netfs_io_request *rreq, bool sync); /* * main.c */ extern unsigned int netfs_debug; extern struct list_head netfs_io_requests; extern spinlock_t netfs_proc_lock; extern mempool_t netfs_request_pool; extern mempool_t netfs_subrequest_pool; #ifdef CONFIG_PROC_FS static inline void netfs_proc_add_rreq(struct netfs_io_request *rreq) { … } static inline void netfs_proc_del_rreq(struct netfs_io_request *rreq) { … } #else static inline void netfs_proc_add_rreq(struct netfs_io_request *rreq) {} static inline void netfs_proc_del_rreq(struct netfs_io_request *rreq) {} #endif /* * misc.c */ /* * objects.c */ struct netfs_io_request *netfs_alloc_request(struct address_space *mapping, struct file *file, loff_t start, size_t len, enum netfs_io_origin origin); void netfs_get_request(struct netfs_io_request *rreq, enum netfs_rreq_ref_trace what); void netfs_clear_subrequests(struct netfs_io_request *rreq, bool was_async); void netfs_put_request(struct netfs_io_request *rreq, bool was_async, enum netfs_rreq_ref_trace what); struct netfs_io_subrequest *netfs_alloc_subrequest(struct netfs_io_request *rreq); static inline void netfs_see_request(struct netfs_io_request *rreq, enum netfs_rreq_ref_trace what) { … } /* * stats.c */ #ifdef CONFIG_NETFS_STATS extern atomic_t netfs_n_rh_dio_read; extern atomic_t netfs_n_rh_readahead; extern atomic_t netfs_n_rh_read_folio; extern atomic_t netfs_n_rh_rreq; extern atomic_t netfs_n_rh_sreq; extern atomic_t netfs_n_rh_download; extern atomic_t netfs_n_rh_download_done; extern atomic_t netfs_n_rh_download_failed; extern atomic_t netfs_n_rh_download_instead; extern atomic_t netfs_n_rh_read; extern atomic_t netfs_n_rh_read_done; extern atomic_t netfs_n_rh_read_failed; extern atomic_t netfs_n_rh_zero; extern atomic_t netfs_n_rh_short_read; extern atomic_t netfs_n_rh_write; extern atomic_t netfs_n_rh_write_begin; extern atomic_t netfs_n_rh_write_done; extern atomic_t netfs_n_rh_write_failed; extern atomic_t netfs_n_rh_write_zskip; extern atomic_t netfs_n_wh_buffered_write; extern atomic_t netfs_n_wh_writethrough; extern atomic_t netfs_n_wh_dio_write; extern atomic_t netfs_n_wh_writepages; extern atomic_t netfs_n_wh_wstream_conflict; extern atomic_t netfs_n_wh_upload; extern atomic_t netfs_n_wh_upload_done; extern atomic_t netfs_n_wh_upload_failed; extern atomic_t netfs_n_wh_write; extern atomic_t netfs_n_wh_write_done; extern atomic_t netfs_n_wh_write_failed; int netfs_stats_show(struct seq_file *m, void *v); static inline void netfs_stat(atomic_t *stat) { … } static inline void netfs_stat_d(atomic_t *stat) { … } #else #define netfs_stat … #define netfs_stat_d … #endif /* * write_collect.c */ int netfs_folio_written_back(struct folio *folio); void netfs_write_collection_worker(struct work_struct *work); void netfs_wake_write_collector(struct netfs_io_request *wreq, bool was_async); /* * write_issue.c */ struct netfs_io_request *netfs_create_write_req(struct address_space *mapping, struct file *file, loff_t start, enum netfs_io_origin origin); void netfs_reissue_write(struct netfs_io_stream *stream, struct netfs_io_subrequest *subreq); int netfs_advance_write(struct netfs_io_request *wreq, struct netfs_io_stream *stream, loff_t start, size_t len, bool to_eof); struct netfs_io_request *netfs_begin_writethrough(struct kiocb *iocb, size_t len); int netfs_advance_writethrough(struct netfs_io_request *wreq, struct writeback_control *wbc, struct folio *folio, size_t copied, bool to_page_end, struct folio **writethrough_cache); int netfs_end_writethrough(struct netfs_io_request *wreq, struct writeback_control *wbc, struct folio *writethrough_cache); int netfs_unbuffered_write(struct netfs_io_request *wreq, bool may_wait, size_t len); /* * Miscellaneous functions. */ static inline bool netfs_is_cache_enabled(struct netfs_inode *ctx) { … } /* * Get a ref on a netfs group attached to a dirty page (e.g. a ceph snap). */ static inline struct netfs_group *netfs_get_group(struct netfs_group *netfs_group) { … } /* * Dispose of a netfs group attached to a dirty page (e.g. a ceph snap). */ static inline void netfs_put_group(struct netfs_group *netfs_group) { … } /* * Dispose of a netfs group attached to a dirty page (e.g. a ceph snap). */ static inline void netfs_put_group_many(struct netfs_group *netfs_group, int nr) { … } /* * fscache-cache.c */ #ifdef CONFIG_PROC_FS extern const struct seq_operations fscache_caches_seq_ops; #endif bool fscache_begin_cache_access(struct fscache_cache *cache, enum fscache_access_trace why); void fscache_end_cache_access(struct fscache_cache *cache, enum fscache_access_trace why); struct fscache_cache *fscache_lookup_cache(const char *name, bool is_cache); void fscache_put_cache(struct fscache_cache *cache, enum fscache_cache_trace where); static inline enum fscache_cache_state fscache_cache_state(const struct fscache_cache *cache) { … } static inline bool fscache_cache_is_live(const struct fscache_cache *cache) { … } static inline void fscache_set_cache_state(struct fscache_cache *cache, enum fscache_cache_state new_state) { … } static inline bool fscache_set_cache_state_maybe(struct fscache_cache *cache, enum fscache_cache_state old_state, enum fscache_cache_state new_state) { … } /* * fscache-cookie.c */ extern struct kmem_cache *fscache_cookie_jar; #ifdef CONFIG_PROC_FS extern const struct seq_operations fscache_cookies_seq_ops; #endif extern struct timer_list fscache_cookie_lru_timer; extern void fscache_print_cookie(struct fscache_cookie *cookie, char prefix); extern bool fscache_begin_cookie_access(struct fscache_cookie *cookie, enum fscache_access_trace why); static inline void fscache_see_cookie(struct fscache_cookie *cookie, enum fscache_cookie_trace where) { … } /* * fscache-main.c */ extern unsigned int fscache_hash(unsigned int salt, const void *data, size_t len); #ifdef CONFIG_FSCACHE int __init fscache_init(void); void __exit fscache_exit(void); #else static inline int fscache_init(void) { return 0; } static inline void fscache_exit(void) {} #endif /* * fscache-proc.c */ #ifdef CONFIG_PROC_FS extern int __init fscache_proc_init(void); extern void fscache_proc_cleanup(void); #else #define fscache_proc_init … #define fscache_proc_cleanup … #endif /* * fscache-stats.c */ #ifdef CONFIG_FSCACHE_STATS extern atomic_t fscache_n_volumes; extern atomic_t fscache_n_volumes_collision; extern atomic_t fscache_n_volumes_nomem; extern atomic_t fscache_n_cookies; extern atomic_t fscache_n_cookies_lru; extern atomic_t fscache_n_cookies_lru_expired; extern atomic_t fscache_n_cookies_lru_removed; extern atomic_t fscache_n_cookies_lru_dropped; extern atomic_t fscache_n_acquires; extern atomic_t fscache_n_acquires_ok; extern atomic_t fscache_n_acquires_oom; extern atomic_t fscache_n_invalidates; extern atomic_t fscache_n_relinquishes; extern atomic_t fscache_n_relinquishes_retire; extern atomic_t fscache_n_relinquishes_dropped; extern atomic_t fscache_n_resizes; extern atomic_t fscache_n_resizes_null; static inline void fscache_stat(atomic_t *stat) { … } static inline void fscache_stat_d(atomic_t *stat) { … } #define __fscache_stat(stat) … int fscache_stats_show(struct seq_file *m); #else #define __fscache_stat … #define fscache_stat … #define fscache_stat_d … static inline int fscache_stats_show(struct seq_file *m) { return 0; } #endif /* * fscache-volume.c */ #ifdef CONFIG_PROC_FS extern const struct seq_operations fscache_volumes_seq_ops; #endif struct fscache_volume *fscache_get_volume(struct fscache_volume *volume, enum fscache_volume_trace where); bool fscache_begin_volume_access(struct fscache_volume *volume, struct fscache_cookie *cookie, enum fscache_access_trace why); void fscache_create_volume(struct fscache_volume *volume, bool wait); /*****************************************************************************/ /* * debug tracing */ #define dbgprintk(FMT, ...) … #define kenter(FMT, ...) … #define kleave(FMT, ...) … #define kdebug(FMT, ...) … #ifdef __KDEBUG #define _enter … #define _leave … #define _debug … #elif defined(CONFIG_NETFS_DEBUG) #define _enter … #define _leave … #define _debug … #else #define _enter(FMT, ...) … #define _leave(FMT, ...) … #define _debug(FMT, ...) … #endif /* * assertions */ #if 1 /* defined(__KDEBUGALL) */ #define ASSERT(X) … #define ASSERTCMP(X, OP, Y) … #define ASSERTIF(C, X) … #define ASSERTIFCMP(C, X, OP, Y) … #else #define ASSERT … #define ASSERTCMP … #define ASSERTIF … #define ASSERTIFCMP … #endif /* assert or not */
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