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145 lines
3.7 KiB
145 lines
3.7 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* Internal definitions for network filesystem support |
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* |
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* Copyright (C) 2021 Red Hat, Inc. All Rights Reserved. |
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* Written by David Howells ([email protected]) |
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*/ |
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#include <linux/netfs.h> |
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#include <linux/fscache.h> |
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#include <trace/events/netfs.h> |
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#ifdef pr_fmt |
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#undef pr_fmt |
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#endif |
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#define pr_fmt(fmt) "netfs: " fmt |
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/* |
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* buffered_read.c |
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*/ |
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void netfs_rreq_unlock_folios(struct netfs_io_request *rreq); |
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/* |
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* io.c |
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*/ |
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int netfs_begin_read(struct netfs_io_request *rreq, bool sync); |
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/* |
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* main.c |
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*/ |
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extern unsigned int netfs_debug; |
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/* |
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* objects.c |
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*/ |
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struct netfs_io_request *netfs_alloc_request(struct address_space *mapping, |
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struct file *file, |
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loff_t start, size_t len, |
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enum netfs_io_origin origin); |
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void netfs_get_request(struct netfs_io_request *rreq, enum netfs_rreq_ref_trace what); |
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void netfs_clear_subrequests(struct netfs_io_request *rreq, bool was_async); |
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void netfs_put_request(struct netfs_io_request *rreq, bool was_async, |
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enum netfs_rreq_ref_trace what); |
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struct netfs_io_subrequest *netfs_alloc_subrequest(struct netfs_io_request *rreq); |
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static inline void netfs_see_request(struct netfs_io_request *rreq, |
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enum netfs_rreq_ref_trace what) |
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{ |
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trace_netfs_rreq_ref(rreq->debug_id, refcount_read(&rreq->ref), what); |
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} |
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/* |
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* stats.c |
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*/ |
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#ifdef CONFIG_NETFS_STATS |
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extern atomic_t netfs_n_rh_readahead; |
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extern atomic_t netfs_n_rh_readpage; |
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extern atomic_t netfs_n_rh_rreq; |
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extern atomic_t netfs_n_rh_sreq; |
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extern atomic_t netfs_n_rh_download; |
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extern atomic_t netfs_n_rh_download_done; |
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extern atomic_t netfs_n_rh_download_failed; |
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extern atomic_t netfs_n_rh_download_instead; |
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extern atomic_t netfs_n_rh_read; |
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extern atomic_t netfs_n_rh_read_done; |
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extern atomic_t netfs_n_rh_read_failed; |
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extern atomic_t netfs_n_rh_zero; |
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extern atomic_t netfs_n_rh_short_read; |
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extern atomic_t netfs_n_rh_write; |
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extern atomic_t netfs_n_rh_write_begin; |
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extern atomic_t netfs_n_rh_write_done; |
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extern atomic_t netfs_n_rh_write_failed; |
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extern atomic_t netfs_n_rh_write_zskip; |
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static inline void netfs_stat(atomic_t *stat) |
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{ |
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atomic_inc(stat); |
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} |
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static inline void netfs_stat_d(atomic_t *stat) |
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{ |
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atomic_dec(stat); |
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} |
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#else |
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#define netfs_stat(x) do {} while(0) |
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#define netfs_stat_d(x) do {} while(0) |
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#endif |
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/* |
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* Miscellaneous functions. |
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*/ |
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static inline bool netfs_is_cache_enabled(struct netfs_i_context *ctx) |
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{ |
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#if IS_ENABLED(CONFIG_FSCACHE) |
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struct fscache_cookie *cookie = ctx->cache; |
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return fscache_cookie_valid(cookie) && cookie->cache_priv && |
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fscache_cookie_enabled(cookie); |
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#else |
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return false; |
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#endif |
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} |
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/*****************************************************************************/ |
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/* |
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* debug tracing |
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*/ |
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#define dbgprintk(FMT, ...) \ |
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printk("[%-6.6s] "FMT"\n", current->comm, ##__VA_ARGS__) |
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#define kenter(FMT, ...) dbgprintk("==> %s("FMT")", __func__, ##__VA_ARGS__) |
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#define kleave(FMT, ...) dbgprintk("<== %s()"FMT"", __func__, ##__VA_ARGS__) |
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#define kdebug(FMT, ...) dbgprintk(FMT, ##__VA_ARGS__) |
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#ifdef __KDEBUG |
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#define _enter(FMT, ...) kenter(FMT, ##__VA_ARGS__) |
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#define _leave(FMT, ...) kleave(FMT, ##__VA_ARGS__) |
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#define _debug(FMT, ...) kdebug(FMT, ##__VA_ARGS__) |
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#elif defined(CONFIG_NETFS_DEBUG) |
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#define _enter(FMT, ...) \ |
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do { \ |
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if (netfs_debug) \ |
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kenter(FMT, ##__VA_ARGS__); \ |
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} while (0) |
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#define _leave(FMT, ...) \ |
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do { \ |
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if (netfs_debug) \ |
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kleave(FMT, ##__VA_ARGS__); \ |
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} while (0) |
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#define _debug(FMT, ...) \ |
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do { \ |
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if (netfs_debug) \ |
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kdebug(FMT, ##__VA_ARGS__); \ |
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} while (0) |
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#else |
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#define _enter(FMT, ...) no_printk("==> %s("FMT")", __func__, ##__VA_ARGS__) |
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#define _leave(FMT, ...) no_printk("<== %s()"FMT"", __func__, ##__VA_ARGS__) |
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#define _debug(FMT, ...) no_printk(FMT, ##__VA_ARGS__) |
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#endif
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