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e1b1240c1f
Add a helper to do the pre-reading work for the netfs write_begin address space op. Changes v6: - Fixed a missing rreq put in netfs_write_begin()[3]. - Use DEFINE_READAHEAD()[4]. v5: - Made the wait for PG_fscache in netfs_write_begin() killable[2]. v4: - Added flag to netfs_subreq_terminated() to indicate that the caller may have been running async and stuff that might sleep needs punting to a workqueue (can't use in_softirq()[1]). Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-and-tested-by: Jeff Layton <jlayton@kernel.org> Tested-by: Dave Wysochanski <dwysocha@redhat.com> Tested-By: Marc Dionne <marc.dionne@auristor.com> cc: Matthew Wilcox <willy@infradead.org> cc: linux-mm@kvack.org cc: linux-cachefs@redhat.com cc: linux-afs@lists.infradead.org cc: linux-nfs@vger.kernel.org cc: linux-cifs@vger.kernel.org cc: ceph-devel@vger.kernel.org cc: v9fs-developer@lists.sourceforge.net cc: linux-fsdevel@vger.kernel.org Link: https://lore.kernel.org/r/20210216084230.GA23669@lst.de/ [1] Link: https://lore.kernel.org/r/2499407.1616505440@warthog.procyon.org.uk/ [2] Link: https://lore.kernel.org/r/161781042127.463527.9154479794406046987.stgit@warthog.procyon.org.uk/ [3] Link: https://lore.kernel.org/r/1234933.1617886271@warthog.procyon.org.uk/ [4] Link: https://lore.kernel.org/r/160588543960.3465195.2792938973035886168.stgit@warthog.procyon.org.uk/ # rfc Link: https://lore.kernel.org/r/161118140165.1232039.16418853874312234477.stgit@warthog.procyon.org.uk/ # rfc Link: https://lore.kernel.org/r/161161035539.2537118.15674887534950908530.stgit@warthog.procyon.org.uk/ # v2 Link: https://lore.kernel.org/r/161340398368.1303470.11242918276563276090.stgit@warthog.procyon.org.uk/ # v3 Link: https://lore.kernel.org/r/161539541541.286939.1889738674057013729.stgit@warthog.procyon.org.uk/ # v4 Link: https://lore.kernel.org/r/161653798616.2770958.17213315845968485563.stgit@warthog.procyon.org.uk/ # v5 Link: https://lore.kernel.org/r/161789080530.6155.1011847312392330491.stgit@warthog.procyon.org.uk/ # v6
97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
/* 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 (dhowells@redhat.com)
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*/
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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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* read_helper.c
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*/
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extern unsigned int netfs_debug;
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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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/*
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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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