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Thu, 21 Dec 2023 13:24:14 +0000 (UTC) From: David Howells To: Jeff Layton , Steve French Cc: David Howells , Matthew Wilcox , Marc Dionne , Paulo Alcantara , Shyam Prasad N , Tom Talpey , Dominique Martinet , Eric Van Hensbergen , Ilya Dryomov , Christian Brauner , linux-cachefs@redhat.com, linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v5 03/40] netfs, fscache: Move fs/fscache/* into fs/netfs/ Date: Thu, 21 Dec 2023 13:22:58 +0000 Message-ID: <20231221132400.1601991-4-dhowells@redhat.com> In-Reply-To: <20231221132400.1601991-1-dhowells@redhat.com> References: <20231221132400.1601991-1-dhowells@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.3 X-Rspamd-Queue-Id: 83164140016 X-Rspam-User: X-Rspamd-Server: rspam11 X-Stat-Signature: csraewasypb876mfah56odpejb738qcz X-HE-Tag: 1703165061-492832 X-HE-Meta: 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: There's a problem with dependencies between netfslib and fscache as each wants to access some functions of the other. Deal with this by moving fs/fscache/* into fs/netfs/ and renaming those files to begin with "fscache-". For the moment, the moved files are changed as little as possible and an fscache module is still built. A subsequent patch will integrate them. Signed-off-by: David Howells Reviewed-by: Jeff Layton cc: Christian Brauner cc: linux-fsdevel@vger.kernel.org cc: linux-cachefs@redhat.com --- Notes: Changes ======= ver #5) - Adjust MAINTAINERS file. MAINTAINERS | 21 ++++++---- fs/Kconfig | 1 - fs/Makefile | 1 - fs/fscache/Kconfig | 40 ------------------- fs/fscache/Makefile | 16 -------- fs/netfs/Kconfig | 39 ++++++++++++++++++ fs/netfs/Makefile | 14 ++++++- fs/{fscache/cache.c => netfs/fscache_cache.c} | 0 .../cookie.c => netfs/fscache_cookie.c} | 0 .../internal.h => netfs/fscache_internal.h} | 0 fs/{fscache/io.c => netfs/fscache_io.c} | 0 fs/{fscache/main.c => netfs/fscache_main.c} | 0 fs/{fscache/proc.c => netfs/fscache_proc.c} | 0 fs/{fscache/stats.c => netfs/fscache_stats.c} | 0 .../volume.c => netfs/fscache_volume.c} | 0 fs/netfs/internal.h | 5 +++ fs/netfs/main.c | 5 ++- 17 files changed, 73 insertions(+), 69 deletions(-) delete mode 100644 fs/fscache/Kconfig delete mode 100644 fs/fscache/Makefile rename fs/{fscache/cache.c => netfs/fscache_cache.c} (100%) rename fs/{fscache/cookie.c => netfs/fscache_cookie.c} (100%) rename fs/{fscache/internal.h => netfs/fscache_internal.h} (100%) rename fs/{fscache/io.c => netfs/fscache_io.c} (100%) rename fs/{fscache/main.c => netfs/fscache_main.c} (100%) rename fs/{fscache/proc.c => netfs/fscache_proc.c} (100%) rename fs/{fscache/stats.c => netfs/fscache_stats.c} (100%) rename fs/{fscache/volume.c => netfs/fscache_volume.c} (100%) diff --git a/MAINTAINERS b/MAINTAINERS index 9104430e148e..b38e1723b505 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8135,6 +8135,19 @@ S: Supported F: fs/iomap/ F: include/linux/iomap.h +FILESYSTEMS [NETFS LIBRARY] +M: David Howells +L: linux-cachefs@redhat.com (moderated for non-subscribers) +L: linux-fsdevel@vger.kernel.org +S: Supported +F: Documentation/filesystems/caching/ +F: Documentation/filesystems/netfs_library.rst +F: fs/netfs/ +F: include/linux/fscache*.h +F: include/linux/netfs.h +F: include/trace/events/fscache.h +F: include/trace/events/netfs.h + FINTEK F75375S HARDWARE MONITOR AND FAN CONTROLLER DRIVER M: Riku Voipio L: linux-hwmon@vger.kernel.org @@ -8569,14 +8582,6 @@ F: Documentation/power/freezing-of-tasks.rst F: include/linux/freezer.h F: kernel/freezer.c -FS-CACHE: LOCAL CACHING FOR NETWORK FILESYSTEMS -M: David Howells -L: linux-cachefs@redhat.com (moderated for non-subscribers) -S: Supported -F: Documentation/filesystems/caching/ -F: fs/fscache/ -F: include/linux/fscache*.h - FSCRYPT: FILE SYSTEM LEVEL ENCRYPTION SUPPORT M: Eric Biggers M: Theodore Y. Ts'o diff --git a/fs/Kconfig b/fs/Kconfig index 42837617a55b..c935c341eb6e 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -140,7 +140,6 @@ source "fs/overlayfs/Kconfig" menu "Caches" source "fs/netfs/Kconfig" -source "fs/fscache/Kconfig" source "fs/cachefiles/Kconfig" endmenu diff --git a/fs/Makefile b/fs/Makefile index 75522f88e763..af7632368e98 100644 --- a/fs/Makefile +++ b/fs/Makefile @@ -60,7 +60,6 @@ obj-$(CONFIG_DLM) += dlm/ # Do not add any filesystems before this line obj-$(CONFIG_NETFS_SUPPORT) += netfs/ -obj-$(CONFIG_FSCACHE) += fscache/ obj-$(CONFIG_REISERFS_FS) += reiserfs/ obj-$(CONFIG_EXT4_FS) += ext4/ # We place ext4 before ext2 so that clean ext3 root fs's do NOT mount using the diff --git a/fs/fscache/Kconfig b/fs/fscache/Kconfig deleted file mode 100644 index b313a978ae0a..000000000000 --- a/fs/fscache/Kconfig +++ /dev/null @@ -1,40 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0-only - -config FSCACHE - tristate "General filesystem local caching manager" - select NETFS_SUPPORT - help - This option enables a generic filesystem caching manager that can be - used by various network and other filesystems to cache data locally. - Different sorts of caches can be plugged in, depending on the - resources available. - - See Documentation/filesystems/caching/fscache.rst for more information. - -config FSCACHE_STATS - bool "Gather statistical information on local caching" - depends on FSCACHE && PROC_FS - select NETFS_STATS - help - This option causes statistical information to be gathered on local - caching and exported through file: - - /proc/fs/fscache/stats - - The gathering of statistics adds a certain amount of overhead to - execution as there are a quite a few stats gathered, and on a - multi-CPU system these may be on cachelines that keep bouncing - between CPUs. On the other hand, the stats are very useful for - debugging purposes. Saying 'Y' here is recommended. - - See Documentation/filesystems/caching/fscache.rst for more information. - -config FSCACHE_DEBUG - bool "Debug FS-Cache" - depends on FSCACHE - help - This permits debugging to be dynamically enabled in the local caching - management module. If this is set, the debugging output may be - enabled by setting bits in /sys/modules/fscache/parameter/debug. - - See Documentation/filesystems/caching/fscache.rst for more information. diff --git a/fs/fscache/Makefile b/fs/fscache/Makefile deleted file mode 100644 index afb090ea16c4..000000000000 --- a/fs/fscache/Makefile +++ /dev/null @@ -1,16 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# -# Makefile for general filesystem caching code -# - -fscache-y := \ - cache.o \ - cookie.o \ - io.o \ - main.o \ - volume.o - -fscache-$(CONFIG_PROC_FS) += proc.o -fscache-$(CONFIG_FSCACHE_STATS) += stats.o - -obj-$(CONFIG_FSCACHE) := fscache.o diff --git a/fs/netfs/Kconfig b/fs/netfs/Kconfig index b4db21022cb4..b4378688357c 100644 --- a/fs/netfs/Kconfig +++ b/fs/netfs/Kconfig @@ -21,3 +21,42 @@ config NETFS_STATS multi-CPU system these may be on cachelines that keep bouncing between CPUs. On the other hand, the stats are very useful for debugging purposes. Saying 'Y' here is recommended. + +config FSCACHE + tristate "General filesystem local caching manager" + select NETFS_SUPPORT + help + This option enables a generic filesystem caching manager that can be + used by various network and other filesystems to cache data locally. + Different sorts of caches can be plugged in, depending on the + resources available. + + See Documentation/filesystems/caching/fscache.rst for more information. + +config FSCACHE_STATS + bool "Gather statistical information on local caching" + depends on FSCACHE && PROC_FS + select NETFS_STATS + help + This option causes statistical information to be gathered on local + caching and exported through file: + + /proc/fs/fscache/stats + + The gathering of statistics adds a certain amount of overhead to + execution as there are a quite a few stats gathered, and on a + multi-CPU system these may be on cachelines that keep bouncing + between CPUs. On the other hand, the stats are very useful for + debugging purposes. Saying 'Y' here is recommended. + + See Documentation/filesystems/caching/fscache.rst for more information. + +config FSCACHE_DEBUG + bool "Debug FS-Cache" + depends on FSCACHE + help + This permits debugging to be dynamically enabled in the local caching + management module. If this is set, the debugging output may be + enabled by setting bits in /sys/modules/fscache/parameter/debug. + + See Documentation/filesystems/caching/fscache.rst for more information. diff --git a/fs/netfs/Makefile b/fs/netfs/Makefile index 386d6fb92793..bbb2b824bd5e 100644 --- a/fs/netfs/Makefile +++ b/fs/netfs/Makefile @@ -1,5 +1,17 @@ # SPDX-License-Identifier: GPL-2.0 +fscache-y := \ + fscache_cache.o \ + fscache_cookie.o \ + fscache_io.o \ + fscache_main.o \ + fscache_volume.o + +fscache-$(CONFIG_PROC_FS) += fscache_proc.o +fscache-$(CONFIG_FSCACHE_STATS) += fscache_stats.o + +obj-$(CONFIG_FSCACHE) := fscache.o + netfs-y := \ buffered_read.o \ io.o \ @@ -9,4 +21,4 @@ netfs-y := \ netfs-$(CONFIG_NETFS_STATS) += stats.o -obj-$(CONFIG_NETFS_SUPPORT) := netfs.o +obj-$(CONFIG_NETFS_SUPPORT) += netfs.o diff --git a/fs/fscache/cache.c b/fs/netfs/fscache_cache.c similarity index 100% rename from fs/fscache/cache.c rename to fs/netfs/fscache_cache.c diff --git a/fs/fscache/cookie.c b/fs/netfs/fscache_cookie.c similarity index 100% rename from fs/fscache/cookie.c rename to fs/netfs/fscache_cookie.c diff --git a/fs/fscache/internal.h b/fs/netfs/fscache_internal.h similarity index 100% rename from fs/fscache/internal.h rename to fs/netfs/fscache_internal.h diff --git a/fs/fscache/io.c b/fs/netfs/fscache_io.c similarity index 100% rename from fs/fscache/io.c rename to fs/netfs/fscache_io.c diff --git a/fs/fscache/main.c b/fs/netfs/fscache_main.c similarity index 100% rename from fs/fscache/main.c rename to fs/netfs/fscache_main.c diff --git a/fs/fscache/proc.c b/fs/netfs/fscache_proc.c similarity index 100% rename from fs/fscache/proc.c rename to fs/netfs/fscache_proc.c diff --git a/fs/fscache/stats.c b/fs/netfs/fscache_stats.c similarity index 100% rename from fs/fscache/stats.c rename to fs/netfs/fscache_stats.c diff --git a/fs/fscache/volume.c b/fs/netfs/fscache_volume.c similarity index 100% rename from fs/fscache/volume.c rename to fs/netfs/fscache_volume.c diff --git a/fs/netfs/internal.h b/fs/netfs/internal.h index 43fac1b14e40..e96432499eb2 100644 --- a/fs/netfs/internal.h +++ b/fs/netfs/internal.h @@ -5,9 +5,12 @@ * Written by David Howells (dhowells@redhat.com) */ +#include +#include #include #include #include +#include "fscache_internal.h" #ifdef pr_fmt #undef pr_fmt @@ -107,6 +110,7 @@ static inline bool netfs_is_cache_enabled(struct netfs_inode *ctx) /* * debug tracing */ +#if 0 #define dbgprintk(FMT, ...) \ printk("[%-6.6s] "FMT"\n", current->comm, ##__VA_ARGS__) @@ -143,3 +147,4 @@ do { \ #define _leave(FMT, ...) no_printk("<== %s()"FMT"", __func__, ##__VA_ARGS__) #define _debug(FMT, ...) no_printk(FMT, ##__VA_ARGS__) #endif +#endif diff --git a/fs/netfs/main.c b/fs/netfs/main.c index 068568702957..237c54a01d97 100644 --- a/fs/netfs/main.c +++ b/fs/netfs/main.c @@ -8,8 +8,8 @@ #include #include #include "internal.h" -#define CREATE_TRACE_POINTS -#include +//#define CREATE_TRACE_POINTS +//#include MODULE_DESCRIPTION("Network fs support"); MODULE_AUTHOR("Red Hat, Inc."); @@ -18,3 +18,4 @@ MODULE_LICENSE("GPL"); unsigned netfs_debug; module_param_named(debug, netfs_debug, uint, S_IWUSR | S_IRUGO); MODULE_PARM_DESC(netfs_debug, "Netfs support debugging mask"); +