From patchwork Fri Oct 22 19:10:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 12578929 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5BEA5C433F5 for ; Fri, 22 Oct 2021 19:11:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4746261038 for ; Fri, 22 Oct 2021 19:11:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234077AbhJVTNs (ORCPT ); Fri, 22 Oct 2021 15:13:48 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:60795 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234193AbhJVTNK (ORCPT ); Fri, 22 Oct 2021 15:13:10 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1634929852; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=QG+M5rAa4bThsjvcJxBBcK3FnykfYBKtpE7VGJMZ94E=; b=WfSjZYwYl6+pSuw2uWXJd3kwP673OqHge9ppMNQWD5/f5MfxKlxujj82LL7bVGMMvLfRte ZMEt0C2K31AvNpVijQZ0P9wGeJs9jr85+KTvELV+e7gquY7gwE1651BpdQCw/7ayCO64lc XaiO3ojBeAm/ChK89ztbo/j5PUsfbC0= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-21-FqrTLgRwOX6Xa6J7gZAqaQ-1; Fri, 22 Oct 2021 15:10:46 -0400 X-MC-Unique: FqrTLgRwOX6Xa6J7gZAqaQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 254F2801FCE; Fri, 22 Oct 2021 19:10:44 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.33.36.19]) by smtp.corp.redhat.com (Postfix) with ESMTP id C877C60C04; Fri, 22 Oct 2021 19:10:34 +0000 (UTC) Organization: Red Hat UK Ltd. 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Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH v2 51/53] cifs: Support fscache indexing rewrite (untested) From: David Howells To: linux-cachefs@redhat.com Cc: Jeff Layton , Steve French , Shyam Prasad N , linux-cifs@vger.kernel.org, dhowells@redhat.com, Trond Myklebust , Anna Schumaker , Steve French , Dominique Martinet , Jeff Layton , Matthew Wilcox , Alexander Viro , Omar Sandoval , Linus Torvalds , linux-afs@lists.infradead.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs-developer@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Date: Fri, 22 Oct 2021 20:10:34 +0100 Message-ID: <163492983398.1038219.12660503004806977703.stgit@warthog.procyon.org.uk> In-Reply-To: <163492911924.1038219.13107463173777870713.stgit@warthog.procyon.org.uk> References: <163492911924.1038219.13107463173777870713.stgit@warthog.procyon.org.uk> User-Agent: StGit/0.23 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org Change the cifs filesystem to take account of the changes to fscache's indexing rewrite and reenable caching in cifs. The following changes have been made: (1) The fscache_netfs struct is no more, and there's no need to register the filesystem as a whole. (2) The session cookie is now an fscache_volume cookie, allocated with fscache_acquire_volume(). That takes three parameters: a string representing the "volume" in the index, a string naming the cache to use (or NULL) and a u64 that conveys coherency metadata for the volume. For cifs, I've made it render the volume name string as: "cifs,," where the sharename has '/' characters replaced with ';'. This probably needs rethinking a bit as the total name could exceed the maximum filename component length. Further, the coherency data is currently just set to 0. It needs something else doing with it - I wonder if it would suffice simply to sum the resource_id, vol_create_time and vol_serial_number or maybe hash them. (3) The fscache_cookie_def is no more and needed information is passed directly to fscache_acquire_cookie(). The cache no longer calls back into the filesystem, but rather metadata changes are indicated at other times. fscache_acquire_cookie() is passed the same keying and coherency information as before. (4) The functions to set/reset cookies are removed and fscache_use_cookie() and fscache_unuse_cookie() are used instead. fscache_use_cookie() is passed a flag to indicate if the cookie is opened for writing. fscache_unuse_cookie() is passed updates for the metadata if we changed it (ie. if the file was opened for writing). These are called when the file is opened or closed. (5) cifs_setattr_*() are made to call fscache_resize() to change the size of the cache object. Signed-off-by: David Howells Acked-by: Jeff Layton cc: Steve French cc: Shyam Prasad N cc: linux-cifs@vger.kernel.org cc: linux-cachefs@redhat.com --- fs/cifs/Kconfig | 2 - fs/cifs/Makefile | 2 - fs/cifs/cache.c | 105 --------------------------- fs/cifs/cifsfs.c | 11 +-- fs/cifs/cifsglob.h | 5 - fs/cifs/connect.c | 3 - fs/cifs/file.c | 37 ++++++++-- fs/cifs/fscache.c | 201 +++++++++++++--------------------------------------- fs/cifs/fscache.h | 53 +++++--------- fs/cifs/inode.c | 18 +++-- 10 files changed, 118 insertions(+), 319 deletions(-) delete mode 100644 fs/cifs/cache.c diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig index c5477abbcff0..3b7e3b9e4fd2 100644 --- a/fs/cifs/Kconfig +++ b/fs/cifs/Kconfig @@ -188,7 +188,7 @@ config CIFS_SMB_DIRECT config CIFS_FSCACHE bool "Provide CIFS client caching support" - depends on CIFS=m && FSCACHE_OLD || CIFS=y && FSCACHE_OLD=y + depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y help Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data to be cached locally on disk through the general filesystem cache diff --git a/fs/cifs/Makefile b/fs/cifs/Makefile index 87fcacdf3de7..cc8fdcb35b71 100644 --- a/fs/cifs/Makefile +++ b/fs/cifs/Makefile @@ -25,7 +25,7 @@ cifs-$(CONFIG_CIFS_DFS_UPCALL) += cifs_dfs_ref.o dfs_cache.o cifs-$(CONFIG_CIFS_SWN_UPCALL) += netlink.o cifs_swn.o -cifs-$(CONFIG_CIFS_FSCACHE) += fscache.o cache.o +cifs-$(CONFIG_CIFS_FSCACHE) += fscache.o cifs-$(CONFIG_CIFS_SMB_DIRECT) += smbdirect.o diff --git a/fs/cifs/cache.c b/fs/cifs/cache.c deleted file mode 100644 index 8be57aaedab6..000000000000 --- a/fs/cifs/cache.c +++ /dev/null @@ -1,105 +0,0 @@ -// SPDX-License-Identifier: LGPL-2.1 -/* - * CIFS filesystem cache index structure definitions - * - * Copyright (c) 2010 Novell, Inc. - * Authors(s): Suresh Jayaraman (sjayaraman@suse.de> - * - */ -#include "fscache.h" -#include "cifs_debug.h" - -/* - * CIFS filesystem definition for FS-Cache - */ -struct fscache_netfs cifs_fscache_netfs = { - .name = "cifs", - .version = 0, -}; - -/* - * Register CIFS for caching with FS-Cache - */ -int cifs_fscache_register(void) -{ - return fscache_register_netfs(&cifs_fscache_netfs); -} - -/* - * Unregister CIFS for caching - */ -void cifs_fscache_unregister(void) -{ - fscache_unregister_netfs(&cifs_fscache_netfs); -} - -/* - * Server object for FS-Cache - */ -const struct fscache_cookie_def cifs_fscache_server_index_def = { - .name = "CIFS.server", - .type = FSCACHE_COOKIE_TYPE_INDEX, -}; - -static enum -fscache_checkaux cifs_fscache_super_check_aux(void *cookie_netfs_data, - const void *data, - uint16_t datalen, - loff_t object_size) -{ - struct cifs_fscache_super_auxdata auxdata; - const struct cifs_tcon *tcon = cookie_netfs_data; - - if (datalen != sizeof(auxdata)) - return FSCACHE_CHECKAUX_OBSOLETE; - - memset(&auxdata, 0, sizeof(auxdata)); - auxdata.resource_id = tcon->resource_id; - auxdata.vol_create_time = tcon->vol_create_time; - auxdata.vol_serial_number = tcon->vol_serial_number; - - if (memcmp(data, &auxdata, datalen) != 0) - return FSCACHE_CHECKAUX_OBSOLETE; - - return FSCACHE_CHECKAUX_OKAY; -} - -/* - * Superblock object for FS-Cache - */ -const struct fscache_cookie_def cifs_fscache_super_index_def = { - .name = "CIFS.super", - .type = FSCACHE_COOKIE_TYPE_INDEX, - .check_aux = cifs_fscache_super_check_aux, -}; - -static enum -fscache_checkaux cifs_fscache_inode_check_aux(void *cookie_netfs_data, - const void *data, - uint16_t datalen, - loff_t object_size) -{ - struct cifs_fscache_inode_auxdata auxdata; - struct cifsInodeInfo *cifsi = cookie_netfs_data; - - if (datalen != sizeof(auxdata)) - return FSCACHE_CHECKAUX_OBSOLETE; - - memset(&auxdata, 0, sizeof(auxdata)); - auxdata.eof = cifsi->server_eof; - auxdata.last_write_time_sec = cifsi->vfs_inode.i_mtime.tv_sec; - auxdata.last_change_time_sec = cifsi->vfs_inode.i_ctime.tv_sec; - auxdata.last_write_time_nsec = cifsi->vfs_inode.i_mtime.tv_nsec; - auxdata.last_change_time_nsec = cifsi->vfs_inode.i_ctime.tv_nsec; - - if (memcmp(data, &auxdata, datalen) != 0) - return FSCACHE_CHECKAUX_OBSOLETE; - - return FSCACHE_CHECKAUX_OKAY; -} - -const struct fscache_cookie_def cifs_fscache_inode_object_def = { - .name = "CIFS.uniqueid", - .type = FSCACHE_COOKIE_TYPE_DATAFILE, - .check_aux = cifs_fscache_inode_check_aux, -}; diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 9fa930dfd78d..d44a587a4c32 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -397,6 +397,8 @@ static void cifs_evict_inode(struct inode *inode) { truncate_inode_pages_final(&inode->i_data); + if (inode->i_state & I_PINNING_FSCACHE_WB) + cifs_fscache_unuse_inode_cookie(inode, true); clear_inode(inode); } @@ -1625,13 +1627,9 @@ init_cifs(void) goto out_destroy_cifsoplockd_wq; } - rc = cifs_fscache_register(); - if (rc) - goto out_destroy_deferredclose_wq; - rc = cifs_init_inodecache(); if (rc) - goto out_unreg_fscache; + goto out_destroy_deferredclose_wq; rc = cifs_init_mids(); if (rc) @@ -1693,8 +1691,6 @@ init_cifs(void) cifs_destroy_mids(); out_destroy_inodecache: cifs_destroy_inodecache(); -out_unreg_fscache: - cifs_fscache_unregister(); out_destroy_deferredclose_wq: destroy_workqueue(deferredclose_wq); out_destroy_cifsoplockd_wq: @@ -1730,7 +1726,6 @@ exit_cifs(void) cifs_destroy_request_bufs(); cifs_destroy_mids(); cifs_destroy_inodecache(); - cifs_fscache_unregister(); destroy_workqueue(deferredclose_wq); destroy_workqueue(cifsoplockd_wq); destroy_workqueue(decrypt_wq); diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index e916470468ea..d749250af775 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -653,9 +653,6 @@ struct TCP_Server_Info { unsigned int total_read; /* total amount of data read in this pass */ atomic_t in_send; /* requests trying to send */ atomic_t num_waiters; /* blocked waiting to get in sendrecv */ -#ifdef CONFIG_CIFS_FSCACHE - struct fscache_cookie *fscache; /* client index cache cookie */ -#endif #ifdef CONFIG_CIFS_STATS2 atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */ atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */ @@ -1084,7 +1081,7 @@ struct cifs_tcon { __u32 max_bytes_copy; #ifdef CONFIG_CIFS_FSCACHE u64 resource_id; /* server resource id */ - struct fscache_cookie *fscache; /* cookie for share */ + struct fscache_volume *fscache; /* cookie for share */ #endif struct list_head pending_opens; /* list of incomplete opens */ struct cached_fid crfid; /* Cached root fid */ diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index c3b94c1e4591..db13e0f8bc4c 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -1331,7 +1331,6 @@ cifs_put_tcp_session(struct TCP_Server_Info *server, int from_reconnect) spin_unlock(&GlobalMid_Lock); cifs_crypto_secmech_release(server); - cifs_fscache_release_client_cookie(server); kfree(server->session_key.response); server->session_key.response = NULL; @@ -1477,8 +1476,6 @@ cifs_get_tcp_session(struct smb3_fs_context *ctx) list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); spin_unlock(&cifs_tcp_ses_lock); - cifs_fscache_get_client_cookie(tcp_ses); - /* queue echo request delayed work */ queue_delayed_work(cifsiod_wq, &tcp_ses->echo, tcp_ses->echo_interval); diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 02894e999c56..04c841354077 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -632,7 +632,18 @@ int cifs_open(struct inode *inode, struct file *file) goto out; } - cifs_fscache_set_inode_cookie(inode, file); + + fscache_use_cookie(cifs_inode_cookie(file_inode(file)), + file->f_mode & FMODE_WRITE); + if (file->f_flags & O_DIRECT && + (!((file->f_flags & O_ACCMODE) != O_RDONLY) || + file->f_flags & O_APPEND)) { + struct cifs_fscache_inode_auxdata auxdata; + cifs_fscache_fill_auxdata(file_inode(file), &auxdata); + fscache_invalidate(cifs_inode_cookie(file_inode(file)), + &auxdata, i_size_read(file_inode(file)), + FSCACHE_INVAL_DIO_WRITE); + } if ((oplock & CIFS_CREATE_ACTION) && !posix_open_ok && tcon->unix_ext) { /* @@ -876,6 +887,8 @@ int cifs_close(struct inode *inode, struct file *file) struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct cifs_deferred_close *dclose; + cifs_fscache_unuse_inode_cookie(inode, file->f_mode & FMODE_WRITE); + if (file->private_data != NULL) { cfile = file->private_data; file->private_data = NULL; @@ -886,7 +899,6 @@ int cifs_close(struct inode *inode, struct file *file) dclose) { if (test_and_clear_bit(CIFS_INO_MODIFIED_ATTR, &cinode->flags)) { inode->i_ctime = inode->i_mtime = current_time(inode); - cifs_fscache_update_inode_cookie(inode); } spin_lock(&cinode->deferred_lock); cifs_add_deferred_close(cfile, dclose); @@ -4787,14 +4799,14 @@ static int cifs_release_page(struct page *page, gfp_t gfp) return false; wait_on_page_fscache(page); } + fscache_note_page_release(cifs_inode_cookie(page->mapping->host)); return true; } static void cifs_invalidate_page(struct page *page, unsigned int offset, unsigned int length) { - if (offset == 0 && length == PAGE_SIZE) - wait_on_page_fscache(page); + wait_on_page_fscache(page); } static int cifs_launder_page(struct page *page) @@ -4971,6 +4983,19 @@ static void cifs_swap_deactivate(struct file *file) /* do we need to unpin (or unlock) the file */ } +/* + * Mark a page as having been made dirty and thus needing writeback. We also + * need to pin the cache object to write back to. + */ +#ifdef CONFIG_CIFS_FSCACHE +static int cifs_set_page_dirty(struct page *page) +{ + return fscache_set_page_dirty(page, cifs_inode_cookie(page->mapping->host)); +} +#else +#define cifs_set_page_dirty __set_page_dirty_nobuffers +#endif + const struct address_space_operations cifs_addr_ops = { .readpage = cifs_readpage, .readpages = cifs_readpages, @@ -4978,7 +5003,7 @@ const struct address_space_operations cifs_addr_ops = { .writepages = cifs_writepages, .write_begin = cifs_write_begin, .write_end = cifs_write_end, - .set_page_dirty = __set_page_dirty_nobuffers, + .set_page_dirty = cifs_set_page_dirty, .releasepage = cifs_release_page, .direct_IO = cifs_direct_io, .invalidatepage = cifs_invalidate_page, @@ -5003,7 +5028,7 @@ const struct address_space_operations cifs_addr_ops_smallbuf = { .writepages = cifs_writepages, .write_begin = cifs_write_begin, .write_end = cifs_write_end, - .set_page_dirty = __set_page_dirty_nobuffers, + .set_page_dirty = cifs_set_page_dirty, .releasepage = cifs_release_page, .invalidatepage = cifs_invalidate_page, .launder_page = cifs_launder_page, diff --git a/fs/cifs/fscache.c b/fs/cifs/fscache.c index d6ff668c268a..fa397e734b5c 100644 --- a/fs/cifs/fscache.c +++ b/fs/cifs/fscache.c @@ -12,217 +12,114 @@ #include "cifs_fs_sb.h" #include "cifsproto.h" -/* - * Key layout of CIFS server cache index object - */ -struct cifs_server_key { - struct { - uint16_t family; /* address family */ - __be16 port; /* IP port */ - } hdr; - union { - struct in_addr ipv4_addr; - struct in6_addr ipv6_addr; - }; -} __packed; - -/* - * Get a cookie for a server object keyed by {IPaddress,port,family} tuple - */ -void cifs_fscache_get_client_cookie(struct TCP_Server_Info *server) +void cifs_fscache_get_super_cookie(struct cifs_tcon *tcon) { - const struct sockaddr *sa = (struct sockaddr *) &server->dstaddr; - const struct sockaddr_in *addr = (struct sockaddr_in *) sa; - const struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) sa; - struct cifs_server_key key; - uint16_t key_len = sizeof(key.hdr); - - memset(&key, 0, sizeof(key)); + struct cifs_fscache_super_auxdata auxdata; + struct TCP_Server_Info *server = tcon->ses->server; + const struct sockaddr *sa = (struct sockaddr *)&server->dstaddr; + size_t slen, i; + char *sharename; + char *key; - /* - * Should not be a problem as sin_family/sin6_family overlays - * sa_family field - */ - key.hdr.family = sa->sa_family; + tcon->fscache = NULL; switch (sa->sa_family) { case AF_INET: - key.hdr.port = addr->sin_port; - key.ipv4_addr = addr->sin_addr; - key_len += sizeof(key.ipv4_addr); - break; - case AF_INET6: - key.hdr.port = addr6->sin6_port; - key.ipv6_addr = addr6->sin6_addr; - key_len += sizeof(key.ipv6_addr); break; - default: cifs_dbg(VFS, "Unknown network family '%d'\n", sa->sa_family); - server->fscache = NULL; return; } - server->fscache = - fscache_acquire_cookie(cifs_fscache_netfs.primary_index, - &cifs_fscache_server_index_def, - &key, key_len, - NULL, 0, - server, 0, true); - cifs_dbg(FYI, "%s: (0x%p/0x%p)\n", - __func__, server, server->fscache); -} - -void cifs_fscache_release_client_cookie(struct TCP_Server_Info *server) -{ - cifs_dbg(FYI, "%s: (0x%p/0x%p)\n", - __func__, server, server->fscache); - fscache_relinquish_cookie(server->fscache, NULL, false); - server->fscache = NULL; -} - -void cifs_fscache_get_super_cookie(struct cifs_tcon *tcon) -{ - struct TCP_Server_Info *server = tcon->ses->server; - char *sharename; - struct cifs_fscache_super_auxdata auxdata; - sharename = extract_sharename(tcon->treeName); if (IS_ERR(sharename)) { cifs_dbg(FYI, "%s: couldn't extract sharename\n", __func__); - tcon->fscache = NULL; return; } + slen = strlen(sharename); + for (i = 0; i < slen; i++) + if (sharename[i] == '/') + sharename[i] = ';'; + + key = kasprintf(GFP_KERNEL, "cifs,%pISpc,%s", sa, sharename); + if (!key) + goto out; + memset(&auxdata, 0, sizeof(auxdata)); auxdata.resource_id = tcon->resource_id; auxdata.vol_create_time = tcon->vol_create_time; auxdata.vol_serial_number = tcon->vol_serial_number; + // TODO: Do something with the volume coherency data - tcon->fscache = - fscache_acquire_cookie(server->fscache, - &cifs_fscache_super_index_def, - sharename, strlen(sharename), - &auxdata, sizeof(auxdata), - tcon, 0, true); + tcon->fscache = fscache_acquire_volume(key, + NULL, /* preferred_cache */ + 0 /* coherency_data */); + cifs_dbg(FYI, "%s: (%s/0x%p)\n", __func__, key, tcon->fscache); + + kfree(key); +out: kfree(sharename); - cifs_dbg(FYI, "%s: (0x%p/0x%p)\n", - __func__, server->fscache, tcon->fscache); } void cifs_fscache_release_super_cookie(struct cifs_tcon *tcon) { struct cifs_fscache_super_auxdata auxdata; + cifs_dbg(FYI, "%s: (0x%p)\n", __func__, tcon->fscache); + memset(&auxdata, 0, sizeof(auxdata)); auxdata.resource_id = tcon->resource_id; auxdata.vol_create_time = tcon->vol_create_time; auxdata.vol_serial_number = tcon->vol_serial_number; + // TODO: Do something with the volume coherency data - cifs_dbg(FYI, "%s: (0x%p)\n", __func__, tcon->fscache); - fscache_relinquish_cookie(tcon->fscache, &auxdata, false); + fscache_relinquish_volume(tcon->fscache, + 0, /* coherency_data */ + false); tcon->fscache = NULL; } -static void cifs_fscache_acquire_inode_cookie(struct cifsInodeInfo *cifsi, - struct cifs_tcon *tcon) +void cifs_fscache_get_inode_cookie(struct inode *inode) { + struct cifsInodeInfo *cifsi = CIFS_I(inode); + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); struct cifs_fscache_inode_auxdata auxdata; - memset(&auxdata, 0, sizeof(auxdata)); - auxdata.eof = cifsi->server_eof; - auxdata.last_write_time_sec = cifsi->vfs_inode.i_mtime.tv_sec; - auxdata.last_change_time_sec = cifsi->vfs_inode.i_ctime.tv_sec; - auxdata.last_write_time_nsec = cifsi->vfs_inode.i_mtime.tv_nsec; - auxdata.last_change_time_nsec = cifsi->vfs_inode.i_ctime.tv_nsec; + cifs_fscache_fill_auxdata(&cifsi->vfs_inode, &auxdata); cifsi->fscache = - fscache_acquire_cookie(tcon->fscache, - &cifs_fscache_inode_object_def, + fscache_acquire_cookie(tcon->fscache, 0, &cifsi->uniqueid, sizeof(cifsi->uniqueid), &auxdata, sizeof(auxdata), - cifsi, cifsi->vfs_inode.i_size, true); + cifsi->vfs_inode.i_size); } -static void cifs_fscache_enable_inode_cookie(struct inode *inode) +void cifs_fscache_unuse_inode_cookie(struct inode *inode, bool update) { - struct cifsInodeInfo *cifsi = CIFS_I(inode); - struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); - struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); - - if (cifsi->fscache) - return; - - if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)) - return; - - cifs_fscache_acquire_inode_cookie(cifsi, tcon); - - cifs_dbg(FYI, "%s: got FH cookie (0x%p/0x%p)\n", - __func__, tcon->fscache, cifsi->fscache); + if (update) { + struct cifs_fscache_inode_auxdata auxdata; + loff_t i_size = i_size_read(inode); + + cifs_fscache_fill_auxdata(inode, &auxdata); + fscache_unuse_cookie(cifs_inode_cookie(inode), &auxdata, &i_size); + } else { + fscache_unuse_cookie(cifs_inode_cookie(inode), NULL, NULL); + } } void cifs_fscache_release_inode_cookie(struct inode *inode) { - struct cifs_fscache_inode_auxdata auxdata; struct cifsInodeInfo *cifsi = CIFS_I(inode); if (cifsi->fscache) { - memset(&auxdata, 0, sizeof(auxdata)); - auxdata.eof = cifsi->server_eof; - auxdata.last_write_time_sec = cifsi->vfs_inode.i_mtime.tv_sec; - auxdata.last_change_time_sec = cifsi->vfs_inode.i_ctime.tv_sec; - auxdata.last_write_time_nsec = cifsi->vfs_inode.i_mtime.tv_nsec; - auxdata.last_change_time_nsec = cifsi->vfs_inode.i_ctime.tv_nsec; - cifs_dbg(FYI, "%s: (0x%p)\n", __func__, cifsi->fscache); - /* fscache_relinquish_cookie does not seem to update auxdata */ - fscache_update_cookie(cifsi->fscache, &auxdata); - fscache_relinquish_cookie(cifsi->fscache, &auxdata, false); + fscache_relinquish_cookie(cifsi->fscache, false); cifsi->fscache = NULL; } } -void cifs_fscache_update_inode_cookie(struct inode *inode) -{ - struct cifs_fscache_inode_auxdata auxdata; - struct cifsInodeInfo *cifsi = CIFS_I(inode); - - if (cifsi->fscache) { - memset(&auxdata, 0, sizeof(auxdata)); - auxdata.eof = cifsi->server_eof; - auxdata.last_write_time_sec = cifsi->vfs_inode.i_mtime.tv_sec; - auxdata.last_change_time_sec = cifsi->vfs_inode.i_ctime.tv_sec; - auxdata.last_write_time_nsec = cifsi->vfs_inode.i_mtime.tv_nsec; - auxdata.last_change_time_nsec = cifsi->vfs_inode.i_ctime.tv_nsec; - - cifs_dbg(FYI, "%s: (0x%p)\n", __func__, cifsi->fscache); - fscache_update_cookie(cifsi->fscache, &auxdata); - } -} - -void cifs_fscache_set_inode_cookie(struct inode *inode, struct file *filp) -{ - cifs_fscache_enable_inode_cookie(inode); -} - -void cifs_fscache_reset_inode_cookie(struct inode *inode) -{ - struct cifsInodeInfo *cifsi = CIFS_I(inode); - struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); - struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); - struct fscache_cookie *old = cifsi->fscache; - - if (cifsi->fscache) { - /* retire the current fscache cache and get a new one */ - fscache_relinquish_cookie(cifsi->fscache, NULL, true); - - cifs_fscache_acquire_inode_cookie(cifsi, tcon); - cifs_dbg(FYI, "%s: new cookie 0x%p oldcookie 0x%p\n", - __func__, cifsi->fscache, old); - } -} - /* * Retrieve a page from FS-Cache */ diff --git a/fs/cifs/fscache.h b/fs/cifs/fscache.h index 704c7354ace1..886a47a4c409 100644 --- a/fs/cifs/fscache.h +++ b/fs/cifs/fscache.h @@ -10,7 +10,7 @@ #define _CIFS_FSCACHE_H #define FSCACHE_USE_FALLBACK_IO_API -#include +#include #include "cifsglob.h" @@ -33,32 +33,31 @@ struct cifs_fscache_inode_auxdata { u64 last_change_time_sec; u32 last_write_time_nsec; u32 last_change_time_nsec; - u64 eof; }; -/* - * cache.c - */ -extern struct fscache_netfs cifs_fscache_netfs; -extern const struct fscache_cookie_def cifs_fscache_server_index_def; -extern const struct fscache_cookie_def cifs_fscache_super_index_def; -extern const struct fscache_cookie_def cifs_fscache_inode_object_def; - -extern int cifs_fscache_register(void); -extern void cifs_fscache_unregister(void); - /* * fscache.c */ -extern void cifs_fscache_get_client_cookie(struct TCP_Server_Info *); -extern void cifs_fscache_release_client_cookie(struct TCP_Server_Info *); extern void cifs_fscache_get_super_cookie(struct cifs_tcon *); extern void cifs_fscache_release_super_cookie(struct cifs_tcon *); +extern void cifs_fscache_get_inode_cookie(struct inode *); extern void cifs_fscache_release_inode_cookie(struct inode *); -extern void cifs_fscache_update_inode_cookie(struct inode *inode); -extern void cifs_fscache_set_inode_cookie(struct inode *, struct file *); -extern void cifs_fscache_reset_inode_cookie(struct inode *); +extern void cifs_fscache_unuse_inode_cookie(struct inode *, bool); + +static inline +void cifs_fscache_fill_auxdata(struct inode *inode, + struct cifs_fscache_inode_auxdata *auxdata) +{ + struct cifsInodeInfo *cifsi = CIFS_I(inode); + + memset(&auxdata, 0, sizeof(auxdata)); + auxdata->last_write_time_sec = cifsi->vfs_inode.i_mtime.tv_sec; + auxdata->last_write_time_nsec = cifsi->vfs_inode.i_mtime.tv_nsec; + auxdata->last_change_time_sec = cifsi->vfs_inode.i_ctime.tv_sec; + auxdata->last_change_time_nsec = cifsi->vfs_inode.i_ctime.tv_nsec; +} + extern int __cifs_readpage_from_fscache(struct inode *, struct page *); extern void __cifs_readpage_to_fscache(struct inode *, struct page *); @@ -85,23 +84,13 @@ static inline struct fscache_cookie *cifs_inode_cookie(struct inode *inode) } #else /* CONFIG_CIFS_FSCACHE */ -static inline int cifs_fscache_register(void) { return 0; } -static inline void cifs_fscache_unregister(void) {} - -static inline void -cifs_fscache_get_client_cookie(struct TCP_Server_Info *server) {} -static inline void -cifs_fscache_release_client_cookie(struct TCP_Server_Info *server) {} static inline void cifs_fscache_get_super_cookie(struct cifs_tcon *tcon) {} -static inline void -cifs_fscache_release_super_cookie(struct cifs_tcon *tcon) {} +static inline void cifs_fscache_release_super_cookie(struct cifs_tcon *tcon) {} +static inline void cifs_fscache_get_inode_cookie(struct inode *inode) {} static inline void cifs_fscache_release_inode_cookie(struct inode *inode) {} -static inline void cifs_fscache_update_inode_cookie(struct inode *inode) {} -static inline void cifs_fscache_set_inode_cookie(struct inode *inode, - struct file *filp) {} -static inline void cifs_fscache_reset_inode_cookie(struct inode *inode) {} - +static inline void cifs_fscache_unuse_inode_cookie(struct inode *inode) {} +static inline struct fscache_cookie *cifs_inode_cookie(struct inode *inode) { return NULL; } static inline int cifs_readpage_from_fscache(struct inode *inode, struct page *page) diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 82848412ad85..384d7b8686b1 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -1298,10 +1298,7 @@ cifs_iget(struct super_block *sb, struct cifs_fattr *fattr) inode->i_flags |= S_NOATIME | S_NOCMTIME; if (inode->i_state & I_NEW) { inode->i_ino = hash; -#ifdef CONFIG_CIFS_FSCACHE - /* initialize per-inode cache cookie pointer */ - CIFS_I(inode)->fscache = NULL; -#endif + cifs_fscache_get_inode_cookie(inode); unlock_new_inode(inode); } } @@ -2263,6 +2260,8 @@ cifs_dentry_needs_reval(struct dentry *dentry) int cifs_invalidate_mapping(struct inode *inode) { + struct cifs_fscache_inode_auxdata auxdata; + struct cifsInodeInfo *cifsi = CIFS_I(inode); int rc = 0; if (inode->i_mapping && inode->i_mapping->nrpages != 0) { @@ -2272,7 +2271,8 @@ cifs_invalidate_mapping(struct inode *inode) __func__, inode); } - cifs_fscache_reset_inode_cookie(inode); + cifs_fscache_fill_auxdata(&cifsi->vfs_inode, &auxdata); + fscache_invalidate(cifs_inode_cookie(inode), &auxdata, i_size_read(inode), 0); return rc; } @@ -2777,8 +2777,10 @@ cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) goto out; if ((attrs->ia_valid & ATTR_SIZE) && - attrs->ia_size != i_size_read(inode)) + attrs->ia_size != i_size_read(inode)) { truncate_setsize(inode, attrs->ia_size); + fscache_resize_cookie(cifs_inode_cookie(inode), attrs->ia_size); + } setattr_copy(&init_user_ns, inode, attrs); mark_inode_dirty(inode); @@ -2973,8 +2975,10 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) goto cifs_setattr_exit; if ((attrs->ia_valid & ATTR_SIZE) && - attrs->ia_size != i_size_read(inode)) + attrs->ia_size != i_size_read(inode)) { truncate_setsize(inode, attrs->ia_size); + fscache_resize_cookie(cifs_inode_cookie(inode), attrs->ia_size); + } setattr_copy(&init_user_ns, inode, attrs); mark_inode_dirty(inode);