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![David Howells](/assets/img/avatar_default.png)
Add a netfs_i_context struct that should be included in the network filesystem's own inode struct wrapper, directly after the VFS's inode struct, e.g.: struct my_inode { struct { /* These must be contiguous */ struct inode vfs_inode; struct netfs_i_context netfs_ctx; }; }; The netfs_i_context struct so far contains a single field for the network filesystem to use - the cache cookie: struct netfs_i_context { ... struct fscache_cookie *cache; }; Three functions are provided to help with this: (1) void netfs_i_context_init(struct inode *inode, const struct netfs_request_ops *ops); Initialise the netfs context and set the operations. (2) struct netfs_i_context *netfs_i_context(struct inode *inode); Find the netfs context from the VFS inode. (3) struct inode *netfs_inode(struct netfs_i_context *ctx); Find the VFS inode from the netfs context. Changes ======= ver #4) - Fix netfs_is_cache_enabled() to check cookie->cache_priv to see if a cache is present[3]. - Fix netfs_skip_folio_read() to zero out all of the page, not just some of it[3]. ver #3) - Split out the bit to move ceph cap-getting on readahead into ceph_init_request()[1]. - Stick in a comment to the netfs inode structs indicating the contiguity requirements[2]. ver #2) - Adjust documentation to match. - Use "#if IS_ENABLED()" in netfs_i_cookie(), not "#ifdef". - Move the cap check from ceph_readahead() to ceph_init_request() to be called from netfslib. - Remove ceph_readahead() and use netfs_readahead() directly instead. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Jeff Layton <jlayton@kernel.org> cc: linux-cachefs@redhat.com Link: https://lore.kernel.org/r/8af0d47f17d89c06bbf602496dd845f2b0bf25b3.camel@kernel.org/ [1] Link: https://lore.kernel.org/r/beaf4f6a6c2575ed489adb14b257253c868f9a5c.camel@kernel.org/ [2] Link: https://lore.kernel.org/r/3536452.1647421585@warthog.procyon.org.uk/ [3] Link: https://lore.kernel.org/r/164622984545.3564931.15691742939278418580.stgit@warthog.procyon.org.uk/ # v1 Link: https://lore.kernel.org/r/164678213320.1200972.16807551936267647470.stgit@warthog.procyon.org.uk/ # v2 Link: https://lore.kernel.org/r/164692909854.2099075.9535537286264248057.stgit@warthog.procyon.org.uk/ # v3 Link: https://lore.kernel.org/r/306388.1647595110@warthog.procyon.org.uk/ # v4
58 lines
1.9 KiB
C
58 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* Netfs support statistics
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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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#include <linux/export.h>
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#include <linux/seq_file.h>
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#include "internal.h"
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atomic_t netfs_n_rh_readahead;
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atomic_t netfs_n_rh_readpage;
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atomic_t netfs_n_rh_rreq;
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atomic_t netfs_n_rh_sreq;
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atomic_t netfs_n_rh_download;
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atomic_t netfs_n_rh_download_done;
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atomic_t netfs_n_rh_download_failed;
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atomic_t netfs_n_rh_download_instead;
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atomic_t netfs_n_rh_read;
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atomic_t netfs_n_rh_read_done;
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atomic_t netfs_n_rh_read_failed;
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atomic_t netfs_n_rh_zero;
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atomic_t netfs_n_rh_short_read;
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atomic_t netfs_n_rh_write;
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atomic_t netfs_n_rh_write_begin;
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atomic_t netfs_n_rh_write_done;
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atomic_t netfs_n_rh_write_failed;
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atomic_t netfs_n_rh_write_zskip;
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void netfs_stats_show(struct seq_file *m)
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{
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seq_printf(m, "RdHelp : RA=%u RP=%u WB=%u WBZ=%u rr=%u sr=%u\n",
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atomic_read(&netfs_n_rh_readahead),
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atomic_read(&netfs_n_rh_readpage),
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atomic_read(&netfs_n_rh_write_begin),
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atomic_read(&netfs_n_rh_write_zskip),
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atomic_read(&netfs_n_rh_rreq),
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atomic_read(&netfs_n_rh_sreq));
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seq_printf(m, "RdHelp : ZR=%u sh=%u sk=%u\n",
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atomic_read(&netfs_n_rh_zero),
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atomic_read(&netfs_n_rh_short_read),
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atomic_read(&netfs_n_rh_write_zskip));
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seq_printf(m, "RdHelp : DL=%u ds=%u df=%u di=%u\n",
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atomic_read(&netfs_n_rh_download),
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atomic_read(&netfs_n_rh_download_done),
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atomic_read(&netfs_n_rh_download_failed),
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atomic_read(&netfs_n_rh_download_instead));
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seq_printf(m, "RdHelp : RD=%u rs=%u rf=%u\n",
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atomic_read(&netfs_n_rh_read),
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atomic_read(&netfs_n_rh_read_done),
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atomic_read(&netfs_n_rh_read_failed));
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seq_printf(m, "RdHelp : WR=%u ws=%u wf=%u\n",
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atomic_read(&netfs_n_rh_write),
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atomic_read(&netfs_n_rh_write_done),
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atomic_read(&netfs_n_rh_write_failed));
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}
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EXPORT_SYMBOL(netfs_stats_show);
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