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Message-ID: <164622995118.3564931.6089530629052064470.stgit@warthog.procyon.org.uk> Date: Wed, 02 Mar 2022 14:05:51 +0000 From: David Howells <dhowells@...hat.com> To: linux-cachefs@...hat.com Cc: dhowells@...hat.com, Anna Schumaker <anna.schumaker@...app.com>, Steve French <sfrench@...ba.org>, Dominique Martinet <asmadeus@...ewreck.org>, Jeff Layton <jlayton@...hat.com>, David Wysochanski <dwysocha@...hat.com>, Ilya Dryomov <idryomov@...il.com>, Jeffle Xu <jefflexu@...ux.alibaba.com>, Linus Torvalds <torvalds@...ux-foundation.org>, linux-afs@...ts.infradead.org, linux-nfs@...r.kernel.org, linux-cifs@...r.kernel.org, ceph-devel@...r.kernel.org, v9fs-developer@...ts.sourceforge.net, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH 07/19] netfs: Split netfs_io_* object handling out Split netfs_io_* object handling out into a file that's going to contain object allocation, get and put routines. Signed-off-by: David Howells <dhowells@...hat.com> cc: linux-cachefs@...hat.com --- fs/netfs/Makefile | 6 ++ fs/netfs/internal.h | 16 ++++++ fs/netfs/objects.c | 129 ++++++++++++++++++++++++++++++++++++++++++++++++ fs/netfs/read_helper.c | 125 ----------------------------------------------- 4 files changed, 151 insertions(+), 125 deletions(-) create mode 100644 fs/netfs/objects.c diff --git a/fs/netfs/Makefile b/fs/netfs/Makefile index c15bfc966d96..939fd00a1fc9 100644 --- a/fs/netfs/Makefile +++ b/fs/netfs/Makefile @@ -1,5 +1,9 @@ # SPDX-License-Identifier: GPL-2.0 -netfs-y := read_helper.o stats.o +netfs-y := \ + objects.o \ + read_helper.o + +netfs-$(CONFIG_NETFS_STATS) += stats.o obj-$(CONFIG_NETFS_SUPPORT) := netfs.o diff --git a/fs/netfs/internal.h b/fs/netfs/internal.h index 82ce5c4228e4..1f2ad9c9d103 100644 --- a/fs/netfs/internal.h +++ b/fs/netfs/internal.h @@ -15,11 +15,27 @@ #define pr_fmt(fmt) "netfs: " fmt +/* + * 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); +void netfs_clear_subrequests(struct netfs_io_request *rreq, bool was_async); +void netfs_put_request(struct netfs_io_request *rreq, bool was_async); +struct netfs_io_subrequest *netfs_alloc_subrequest(struct netfs_io_request *rreq); +void netfs_put_subrequest(struct netfs_io_subrequest *subreq, bool was_async); +void netfs_get_subrequest(struct netfs_io_subrequest *subreq); + /* * read_helper.c */ extern unsigned int netfs_debug; +void netfs_rreq_work(struct work_struct *work); + /* * stats.c */ diff --git a/fs/netfs/objects.c b/fs/netfs/objects.c new file mode 100644 index 000000000000..b212de11ebca --- /dev/null +++ b/fs/netfs/objects.c @@ -0,0 +1,129 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Object lifetime handling and tracing. + * + * Copyright (C) 2022 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@...hat.com) + */ + +#include <linux/slab.h> +#include "internal.h" + +/* + * Allocate an I/O request and initialise it. + */ +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) +{ + static atomic_t debug_ids; + struct inode *inode = file ? file_inode(file) : mapping->host; + struct netfs_i_context *ctx = netfs_i_context(inode); + struct netfs_io_request *rreq; + + rreq = kzalloc(sizeof(struct netfs_io_request), GFP_KERNEL); + if (rreq) { + rreq->start = start; + rreq->len = len; + rreq->mapping = mapping; + rreq->inode = inode; + rreq->origin = origin; + rreq->netfs_ops = ctx->ops; + rreq->i_size = i_size_read(inode); + rreq->debug_id = atomic_inc_return(&debug_ids); + INIT_LIST_HEAD(&rreq->subrequests); + INIT_WORK(&rreq->work, netfs_rreq_work); + refcount_set(&rreq->usage, 1); + __set_bit(NETFS_RREQ_IN_PROGRESS, &rreq->flags); + if (ctx->ops->init_request) + ctx->ops->init_request(rreq, file); + netfs_stat(&netfs_n_rh_rreq); + } + + return rreq; +} + +void netfs_get_request(struct netfs_io_request *rreq) +{ + refcount_inc(&rreq->usage); +} + +void netfs_clear_subrequests(struct netfs_io_request *rreq, bool was_async) +{ + struct netfs_io_subrequest *subreq; + + while (!list_empty(&rreq->subrequests)) { + subreq = list_first_entry(&rreq->subrequests, + struct netfs_io_subrequest, rreq_link); + list_del(&subreq->rreq_link); + netfs_put_subrequest(subreq, was_async); + } +} + +static void netfs_free_request(struct work_struct *work) +{ + struct netfs_io_request *rreq = + container_of(work, struct netfs_io_request, work); + netfs_clear_subrequests(rreq, false); + if (rreq->netfs_priv) + rreq->netfs_ops->cleanup(rreq->mapping, rreq->netfs_priv); + trace_netfs_rreq(rreq, netfs_rreq_trace_free); + if (rreq->cache_resources.ops) + rreq->cache_resources.ops->end_operation(&rreq->cache_resources); + kfree(rreq); + netfs_stat_d(&netfs_n_rh_rreq); +} + +void netfs_put_request(struct netfs_io_request *rreq, bool was_async) +{ + if (refcount_dec_and_test(&rreq->usage)) { + if (was_async) { + rreq->work.func = netfs_free_request; + if (!queue_work(system_unbound_wq, &rreq->work)) + BUG(); + } else { + netfs_free_request(&rreq->work); + } + } +} + +/* + * Allocate and partially initialise an I/O request structure. + */ +struct netfs_io_subrequest *netfs_alloc_subrequest(struct netfs_io_request *rreq) +{ + struct netfs_io_subrequest *subreq; + + subreq = kzalloc(sizeof(struct netfs_io_subrequest), GFP_KERNEL); + if (subreq) { + INIT_LIST_HEAD(&subreq->rreq_link); + refcount_set(&subreq->usage, 2); + subreq->rreq = rreq; + netfs_get_request(rreq); + netfs_stat(&netfs_n_rh_sreq); + } + + return subreq; +} + +void netfs_get_subrequest(struct netfs_io_subrequest *subreq) +{ + refcount_inc(&subreq->usage); +} + +static void netfs_free_subrequest(struct netfs_io_subrequest *subreq, + bool was_async) +{ + struct netfs_io_request *rreq = subreq->rreq; + + trace_netfs_sreq(subreq, netfs_sreq_trace_free); + kfree(subreq); + netfs_stat_d(&netfs_n_rh_sreq); + netfs_put_request(rreq, was_async); +} + +void netfs_put_subrequest(struct netfs_io_subrequest *subreq, bool was_async) +{ + if (refcount_dec_and_test(&subreq->usage)) + netfs_free_subrequest(subreq, was_async); +} diff --git a/fs/netfs/read_helper.c b/fs/netfs/read_helper.c index 74e510f9e11f..68616635c5ac 100644 --- a/fs/netfs/read_helper.c +++ b/fs/netfs/read_helper.c @@ -26,129 +26,6 @@ unsigned netfs_debug; module_param_named(debug, netfs_debug, uint, S_IWUSR | S_IRUGO); MODULE_PARM_DESC(netfs_debug, "Netfs support debugging mask"); -static void netfs_rreq_work(struct work_struct *); -static void __netfs_put_subrequest(struct netfs_io_subrequest *, bool); - -static void netfs_put_subrequest(struct netfs_io_subrequest *subreq, - bool was_async) -{ - if (refcount_dec_and_test(&subreq->usage)) - __netfs_put_subrequest(subreq, was_async); -} - -static 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) -{ - static atomic_t debug_ids; - struct inode *inode = file ? file_inode(file) : mapping->host; - struct netfs_i_context *ctx = netfs_i_context(inode); - struct netfs_io_request *rreq; - - rreq = kzalloc(sizeof(struct netfs_io_request), GFP_KERNEL); - if (rreq) { - rreq->start = start; - rreq->len = len; - rreq->mapping = mapping; - rreq->inode = inode; - rreq->origin = origin; - rreq->netfs_ops = ctx->ops; - rreq->i_size = i_size_read(inode); - rreq->debug_id = atomic_inc_return(&debug_ids); - INIT_LIST_HEAD(&rreq->subrequests); - INIT_WORK(&rreq->work, netfs_rreq_work); - refcount_set(&rreq->usage, 1); - __set_bit(NETFS_RREQ_IN_PROGRESS, &rreq->flags); - if (ctx->ops->init_request) - ctx->ops->init_request(rreq, file); - netfs_stat(&netfs_n_rh_rreq); - } - - return rreq; -} - -static void netfs_get_request(struct netfs_io_request *rreq) -{ - refcount_inc(&rreq->usage); -} - -static void netfs_clear_subrequests(struct netfs_io_request *rreq, bool was_async) -{ - struct netfs_io_subrequest *subreq; - - while (!list_empty(&rreq->subrequests)) { - subreq = list_first_entry(&rreq->subrequests, - struct netfs_io_subrequest, rreq_link); - list_del(&subreq->rreq_link); - netfs_put_subrequest(subreq, was_async); - } -} - -static void netfs_free_request(struct work_struct *work) -{ - struct netfs_io_request *rreq = - container_of(work, struct netfs_io_request, work); - netfs_clear_subrequests(rreq, false); - if (rreq->netfs_priv) - rreq->netfs_ops->cleanup(rreq->mapping, rreq->netfs_priv); - trace_netfs_rreq(rreq, netfs_rreq_trace_free); - if (rreq->cache_resources.ops) - rreq->cache_resources.ops->end_operation(&rreq->cache_resources); - kfree(rreq); - netfs_stat_d(&netfs_n_rh_rreq); -} - -static void netfs_put_request(struct netfs_io_request *rreq, bool was_async) -{ - if (refcount_dec_and_test(&rreq->usage)) { - if (was_async) { - rreq->work.func = netfs_free_request; - if (!queue_work(system_unbound_wq, &rreq->work)) - BUG(); - } else { - netfs_free_request(&rreq->work); - } - } -} - -/* - * Allocate and partially initialise an I/O request structure. - */ -static struct netfs_io_subrequest *netfs_alloc_subrequest( - struct netfs_io_request *rreq) -{ - struct netfs_io_subrequest *subreq; - - subreq = kzalloc(sizeof(struct netfs_io_subrequest), GFP_KERNEL); - if (subreq) { - INIT_LIST_HEAD(&subreq->rreq_link); - refcount_set(&subreq->usage, 2); - subreq->rreq = rreq; - netfs_get_request(rreq); - netfs_stat(&netfs_n_rh_sreq); - } - - return subreq; -} - -static void netfs_get_subrequest(struct netfs_io_subrequest *subreq) -{ - refcount_inc(&subreq->usage); -} - -static void __netfs_put_subrequest(struct netfs_io_subrequest *subreq, - bool was_async) -{ - struct netfs_io_request *rreq = subreq->rreq; - - trace_netfs_sreq(subreq, netfs_sreq_trace_free); - kfree(subreq); - netfs_stat_d(&netfs_n_rh_sreq); - netfs_put_request(rreq, was_async); -} - /* * Clear the unread part of an I/O request. */ @@ -564,7 +441,7 @@ static void netfs_rreq_assess(struct netfs_io_request *rreq, bool was_async) netfs_rreq_completed(rreq, was_async); } -static void netfs_rreq_work(struct work_struct *work) +void netfs_rreq_work(struct work_struct *work) { struct netfs_io_request *rreq = container_of(work, struct netfs_io_request, work);
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