| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| David Howells | 1559 | 98.98% | 46 | 88.46% |
| Yue Hu | 4 | 0.25% | 1 | 1.92% |
| Linus Torvalds (pre-git) | 4 | 0.25% | 1 | 1.92% |
| Suresh Jayaraman | 3 | 0.19% | 1 | 1.92% |
| Abhishek Kulkarni | 2 | 0.13% | 1 | 1.92% |
| Andrew Morton | 2 | 0.13% | 1 | 1.92% |
| Thomas Gleixner | 1 | 0.06% | 1 | 1.92% |
| Total | 1575 | 52 |
/* 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 (dhowells@redhat.com) */ #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) "netfs: " 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; #ifdef CONFIG_PROC_FS static inline void netfs_proc_add_rreq(struct netfs_io_request *rreq) { spin_lock(&netfs_proc_lock); list_add_tail_rcu(&rreq->proc_link, &netfs_io_requests); spin_unlock(&netfs_proc_lock); } static inline void netfs_proc_del_rreq(struct netfs_io_request *rreq) { if (!list_empty(&rreq->proc_link)) { spin_lock(&netfs_proc_lock); list_del_rcu(&rreq->proc_link); spin_unlock(&netfs_proc_lock); } } #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 */ #define NETFS_FLAG_PUT_MARK BIT(0) #define NETFS_FLAG_PAGECACHE_MARK BIT(1) int netfs_xa_store_and_mark(struct xarray *xa, unsigned long index, struct folio *folio, unsigned int flags, gfp_t gfp_mask); int netfs_add_folios_to_buffer(struct xarray *buffer, struct address_space *mapping, pgoff_t index, pgoff_t to, gfp_t gfp_mask); void netfs_clear_buffer(struct xarray *buffer); /* * 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) { trace_netfs_rreq_ref(rreq->debug_id, refcount_read(&rreq->ref), what); } /* * output.c */ int netfs_begin_write(struct netfs_io_request *wreq, bool may_wait, enum netfs_write_trace what); struct netfs_io_request *netfs_begin_writethrough(struct kiocb *iocb, size_t len); int netfs_advance_writethrough(struct netfs_io_request *wreq, size_t copied, bool to_page_end); int netfs_end_writethrough(struct netfs_io_request *wreq, struct kiocb *iocb); /* * stats.c */ #ifdef CONFIG_NETFS_STATS extern atomic_t netfs_n_rh_dio_read; extern atomic_t netfs_n_rh_dio_write; extern atomic_t netfs_n_rh_readahead; extern atomic_t netfs_n_rh_readpage; 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_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) { atomic_inc(stat); } static inline void netfs_stat_d(atomic_t *stat) { atomic_dec(stat); } #else #define netfs_stat(x) do {} while(0) #define netfs_stat_d(x) do {} while(0) #endif /* * Miscellaneous functions. */ static inline bool netfs_is_cache_enabled(struct netfs_inode *ctx) { #if IS_ENABLED(CONFIG_FSCACHE) struct fscache_cookie *cookie = ctx->cache; return fscache_cookie_valid(cookie) && cookie->cache_priv && fscache_cookie_enabled(cookie); #else return false; #endif } /* * 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) { if (netfs_group) refcount_inc(&netfs_group->ref); return 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) { if (netfs_group && refcount_dec_and_test(&netfs_group->ref)) netfs_group->free(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) { if (netfs_group && refcount_sub_and_test(nr, &netfs_group->ref)) netfs_group->free(netfs_group); } /* * 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) { return smp_load_acquire(&cache->state); } static inline bool fscache_cache_is_live(const struct fscache_cache *cache) { return fscache_cache_state(cache) == FSCACHE_CACHE_IS_ACTIVE; } static inline void fscache_set_cache_state(struct fscache_cache *cache, enum fscache_cache_state new_state) { smp_store_release(&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) { return try_cmpxchg_release(&cache->state, &old_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) { trace_fscache_cookie(cookie->debug_id, refcount_read(&cookie->ref), 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() (0) #define fscache_proc_cleanup() do {} while (0) #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) { atomic_inc(stat); } static inline void fscache_stat_d(atomic_t *stat) { atomic_dec(stat); } #define __fscache_stat(stat) (stat) int fscache_stats_show(struct seq_file *m); #else #define __fscache_stat(stat) (NULL) #define fscache_stat(stat) do {} while (0) #define fscache_stat_d(stat) do {} while (0) 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); void fscache_put_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, ...) \ printk("[%-6.6s] "FMT"\n", current->comm, ##__VA_ARGS__) #define kenter(FMT, ...) dbgprintk("==> %s("FMT")", __func__, ##__VA_ARGS__) #define kleave(FMT, ...) dbgprintk("<== %s()"FMT"", __func__, ##__VA_ARGS__) #define kdebug(FMT, ...) dbgprintk(FMT, ##__VA_ARGS__) #ifdef __KDEBUG #define _enter(FMT, ...) kenter(FMT, ##__VA_ARGS__) #define _leave(FMT, ...) kleave(FMT, ##__VA_ARGS__) #define _debug(FMT, ...) kdebug(FMT, ##__VA_ARGS__) #elif defined(CONFIG_NETFS_DEBUG) #define _enter(FMT, ...) \ do { \ if (netfs_debug) \ kenter(FMT, ##__VA_ARGS__); \ } while (0) #define _leave(FMT, ...) \ do { \ if (netfs_debug) \ kleave(FMT, ##__VA_ARGS__); \ } while (0) #define _debug(FMT, ...) \ do { \ if (netfs_debug) \ kdebug(FMT, ##__VA_ARGS__); \ } while (0) #else #define _enter(FMT, ...) no_printk("==> %s("FMT")", __func__, ##__VA_ARGS__) #define _leave(FMT, ...) no_printk("<== %s()"FMT"", __func__, ##__VA_ARGS__) #define _debug(FMT, ...) no_printk(FMT, ##__VA_ARGS__) #endif /* * assertions */ #if 1 /* defined(__KDEBUGALL) */ #define ASSERT(X) \ do { \ if (unlikely(!(X))) { \ pr_err("\n"); \ pr_err("Assertion failed\n"); \ BUG(); \ } \ } while (0) #define ASSERTCMP(X, OP, Y) \ do { \ if (unlikely(!((X) OP (Y)))) { \ pr_err("\n"); \ pr_err("Assertion failed\n"); \ pr_err("%lx " #OP " %lx is false\n", \ (unsigned long)(X), (unsigned long)(Y)); \ BUG(); \ } \ } while (0) #define ASSERTIF(C, X) \ do { \ if (unlikely((C) && !(X))) { \ pr_err("\n"); \ pr_err("Assertion failed\n"); \ BUG(); \ } \ } while (0) #define ASSERTIFCMP(C, X, OP, Y) \ do { \ if (unlikely((C) && !((X) OP (Y)))) { \ pr_err("\n"); \ pr_err("Assertion failed\n"); \ pr_err("%lx " #OP " %lx is false\n", \ (unsigned long)(X), (unsigned long)(Y)); \ BUG(); \ } \ } while (0) #else #define ASSERT(X) do {} while (0) #define ASSERTCMP(X, OP, Y) do {} while (0) #define ASSERTIF(C, X) do {} while (0) #define ASSERTIFCMP(C, X, OP, Y) do {} while (0) #endif /* assert or not */
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