diff options
Diffstat (limited to 'fs/netfs/internal.h')
| -rw-r--r-- | fs/netfs/internal.h | 342 |
1 files changed, 336 insertions, 6 deletions
diff --git a/fs/netfs/internal.h b/fs/netfs/internal.h index 43fac1b14e40..c562aec3b483 100644 --- a/fs/netfs/internal.h +++ b/fs/netfs/internal.h @@ -5,9 +5,14 @@ * Written by David Howells (dhowells@redhat.com) */ +#include <linux/slab.h> +#include <linux/seq_file.h> +#include <linux/folio_queue.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 @@ -18,17 +23,47 @@ /* * 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 + * main.c */ -int netfs_begin_read(struct netfs_io_request *rreq, bool sync); +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) +{ + 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 /* - * main.c + * misc.c */ -extern unsigned int netfs_debug; +struct folio_queue *netfs_buffer_make_space(struct netfs_io_request *rreq); +int netfs_buffer_append_folio(struct netfs_io_request *rreq, struct folio *folio, + bool needs_put); +struct folio_queue *netfs_delete_buffer_head(struct netfs_io_request *wreq); +void netfs_clear_buffer(struct netfs_io_request *rreq); +void netfs_reset_iter(struct netfs_io_subrequest *subreq); /* * objects.c @@ -50,11 +85,34 @@ static inline void netfs_see_request(struct netfs_io_request *rreq, } /* + * read_collect.c + */ +void netfs_read_termination_worker(struct work_struct *work); +void netfs_rreq_terminated(struct netfs_io_request *rreq, bool was_async); + +/* + * read_pgpriv2.c + */ +void netfs_pgpriv2_mark_copy_to_cache(struct netfs_io_subrequest *subreq, + struct netfs_io_request *rreq, + struct folio_queue *folioq, + int slot); +void netfs_pgpriv2_write_to_the_cache(struct netfs_io_request *rreq); +bool netfs_pgpriv2_unlock_copied_folios(struct netfs_io_request *wreq); + +/* + * read_retry.c + */ +void netfs_retry_reads(struct netfs_io_request *rreq); +void netfs_unlock_abandoned_read_pages(struct netfs_io_request *rreq); + +/* * 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_readpage; +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; @@ -71,7 +129,23 @@ 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_copy_to_cache; +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; +extern atomic_t netfs_n_wb_lock_skip; +extern atomic_t netfs_n_wb_lock_wait; +extern atomic_t netfs_n_folioq; +int netfs_stats_show(struct seq_file *m, void *v); static inline void netfs_stat(atomic_t *stat) { @@ -89,6 +163,36 @@ static inline void netfs_stat_d(atomic_t *stat) #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, + struct iov_iter *source); +void netfs_issue_write(struct netfs_io_request *wreq, + struct netfs_io_stream *stream); +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) @@ -103,6 +207,178 @@ static inline bool netfs_is_cache_enabled(struct netfs_inode *ctx) #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 && netfs_group != NETFS_FOLIO_COPY_TO_CACHE) + 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 && + netfs_group != NETFS_FOLIO_COPY_TO_CACHE && + 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 && + netfs_group != NETFS_FOLIO_COPY_TO_CACHE && + 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); +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 @@ -143,3 +419,57 @@ do { \ #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 */ |