[v4,05/39] netfs: Move pinning-for-writeback from fscache to netfs

Message ID	20231213152350.431591-6-dhowells@redhat.com (mailing list archive)
State	New, archived
Headers	show Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Ok/2KgoS" From: David Howells <dhowells@redhat.com> To: Jeff Layton <jlayton@kernel.org>, Steve French <smfrench@gmail.com> Cc: David Howells <dhowells@redhat.com>, Matthew Wilcox <willy@infradead.org>, Marc Dionne <marc.dionne@auristor.com>, Paulo Alcantara <pc@manguebit.com>, Shyam Prasad N <sprasad@microsoft.com>, Tom Talpey <tom@talpey.com>, Dominique Martinet <asmadeus@codewreck.org>, Eric Van Hensbergen <ericvh@kernel.org>, Ilya Dryomov <idryomov@gmail.com>, Christian Brauner <christian@brauner.io>, 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 v4 05/39] netfs: Move pinning-for-writeback from fscache to netfs Date: Wed, 13 Dec 2023 15:23:15 +0000 Message-ID: <20231213152350.431591-6-dhowells@redhat.com> In-Reply-To: <20231213152350.431591-1-dhowells@redhat.com> References: <20231213152350.431591-1-dhowells@redhat.com> Precedence: bulk MIME-Version: 1.0 Content-Transfer-Encoding: 8bit
Series	netfs, afs, 9p: Delegate high-level I/O to netfslib \| expand [v4,00/39] netfs, afs, 9p: Delegate high-level I/O to netfslib [v4,01/39] netfs, fscache: Move fs/fscache/* into fs/netfs/ [v4,02/39] netfs, fscache: Combine fscache with netfs [v4,03/39] netfs, fscache: Remove ->begin_cache_operation [v4,04/39] netfs, fscache: Move /proc/fs/fscache to /proc/fs/netfs and put in a symlink [v4,05/39] netfs: Move pinning-for-writeback from fscache to netfs [v4,06/39] netfs: Add a procfile to list in-progress requests [v4,07/39] netfs: Allow the netfs to make the io (sub)request alloc larger [v4,08/39] netfs: Add a ->free_subrequest() op [v4,09/39] afs: Don't use folio->private to record partial modification [v4,10/39] netfs: Provide invalidate_folio and release_folio calls [v4,11/39] netfs: Implement unbuffered/DIO vs buffered I/O locking [v4,12/39] netfs: Add iov_iters to (sub)requests to describe various buffers [v4,13/39] netfs: Add support for DIO buffering [v4,14/39] netfs: Provide tools to create a buffer in an xarray [v4,15/39] netfs: Add bounce buffering support [v4,16/39] netfs: Add func to calculate pagecount/size-limited span of an iterator [v4,17/39] netfs: Limit subrequest by size or number of segments [v4,18/39] netfs: Export netfs_put_subrequest() and some tracepoints [v4,19/39] netfs: Extend the netfs_io_*request structs to handle writes [v4,20/39] netfs: Add a hook to allow tell the netfs to update its i_size [v4,21/39] netfs: Make netfs_put_request() handle a NULL pointer [v4,22/39] netfs: Make the refcounting of netfs_begin_read() easier to use [v4,23/39] netfs: Prep to use folio->private for write grouping and streaming write [v4,24/39] netfs: Dispatch write requests to process a writeback slice [v4,25/39] netfs: Provide func to copy data to pagecache for buffered write [v4,26/39] netfs: Make netfs_read_folio() handle streaming-write pages [v4,27/39] netfs: Allocate multipage folios in the writepath [v4,28/39] netfs: Implement support for unbuffered/DIO read [v4,29/39] netfs: Implement unbuffered/DIO write support [v4,30/39] netfs: Implement buffered write API [v4,31/39] netfs: Allow buffered shared-writeable mmap through netfs_page_mkwrite() [v4,32/39] netfs: Provide netfs_file_read_iter() [v4,33/39] netfs, cachefiles: Pass upper bound length to allow expansion [v4,34/39] netfs: Provide a writepages implementation [v4,35/39] netfs: Provide a launder_folio implementation [v4,36/39] netfs: Implement a write-through caching option [v4,37/39] netfs: Optimise away reads above the point at which there can be no data [v4,38/39] afs: Use the netfs write helpers [v4,39/39] 9p: Use netfslib read/write_iter

diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c index 39db7c01e30a..131b83c31f85 100644 --- a/fs/9p/vfs_addr.c +++ b/fs/9p/vfs_addr.c @@ -317,30 +317,15 @@ static int v9fs_write_end(struct file *filp, struct address_space *mapping, return copied; } -#ifdef CONFIG_9P_FSCACHE -/* - * Mark a page as having been made dirty and thus needing writeback. We also - * need to pin the cache object to write back to. - */ -static bool v9fs_dirty_folio(struct address_space *mapping, struct folio *folio) -{ - struct v9fs_inode *v9inode = V9FS_I(mapping->host); - - return fscache_dirty_folio(mapping, folio, v9fs_inode_cookie(v9inode)); -} -#else -#define v9fs_dirty_folio filemap_dirty_folio -#endif - const struct address_space_operations v9fs_addr_operations = { - .read_folio = netfs_read_folio, - .readahead = netfs_readahead, - .dirty_folio = v9fs_dirty_folio, - .writepage = v9fs_vfs_writepage, - .write_begin = v9fs_write_begin, - .write_end = v9fs_write_end, - .release_folio = v9fs_release_folio, + .read_folio = netfs_read_folio, + .readahead = netfs_readahead, + .dirty_folio = netfs_dirty_folio, + .writepage = v9fs_vfs_writepage, + .write_begin = v9fs_write_begin, + .write_end = v9fs_write_end, + .release_folio = v9fs_release_folio, .invalidate_folio = v9fs_invalidate_folio, - .launder_folio = v9fs_launder_folio, - .direct_IO = v9fs_direct_IO, + .launder_folio = v9fs_launder_folio, + .direct_IO = v9fs_direct_IO, }; diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index b845ee18a80b..74122540e00f 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -376,8 +376,7 @@ void v9fs_evict_inode(struct inode *inode) #ifdef CONFIG_9P_FSCACHE version = cpu_to_le32(v9inode->qid.version); - fscache_clear_inode_writeback(v9fs_inode_cookie(v9inode), inode, - &version); + netfs_clear_inode_writeback(inode, &version); #endif clear_inode(inode); diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c index 73db55c050bf..941f7d0e0bfa 100644 --- a/fs/9p/vfs_super.c +++ b/fs/9p/vfs_super.c @@ -289,31 +289,21 @@ static int v9fs_drop_inode(struct inode *inode) static int v9fs_write_inode(struct inode *inode, struct writeback_control *wbc) { - struct v9fs_inode *v9inode; - /* * send an fsync request to server irrespective of * wbc->sync_mode. */ p9_debug(P9_DEBUG_VFS, "%s: inode %p\n", __func__, inode); - - v9inode = V9FS_I(inode); - fscache_unpin_writeback(wbc, v9fs_inode_cookie(v9inode)); - - return 0; + return netfs_unpin_writeback(inode, wbc); } static int v9fs_write_inode_dotl(struct inode *inode, struct writeback_control *wbc) { - struct v9fs_inode *v9inode; - v9inode = V9FS_I(inode); p9_debug(P9_DEBUG_VFS, "%s: inode %p\n", __func__, inode); - fscache_unpin_writeback(wbc, v9fs_inode_cookie(v9inode)); - - return 0; + return netfs_unpin_writeback(inode, wbc); } static const struct super_operations v9fs_super_ops = { diff --git a/fs/afs/file.c b/fs/afs/file.c index 0326ae21fbea..c09e881da5d2 100644 --- a/fs/afs/file.c +++ b/fs/afs/file.c @@ -55,7 +55,7 @@ const struct inode_operations afs_file_inode_operations = { const struct address_space_operations afs_file_aops = { .read_folio = netfs_read_folio, .readahead = netfs_readahead, - .dirty_folio = afs_dirty_folio, + .dirty_folio = netfs_dirty_folio, .launder_folio = afs_launder_folio, .release_folio = afs_release_folio, .invalidate_folio = afs_invalidate_folio, @@ -383,12 +383,6 @@ const struct netfs_request_ops afs_req_ops = { .issue_read = afs_issue_read, }; -int afs_write_inode(struct inode *inode, struct writeback_control *wbc) -{ - fscache_unpin_writeback(wbc, afs_vnode_cache(AFS_FS_I(inode))); - return 0; -} - /* * Adjust the dirty region of the page on truncation or full invalidation, * getting rid of the markers altogether if the region is entirely invalidated. diff --git a/fs/afs/inode.c b/fs/afs/inode.c index 12b90d680fb6..de3e8fec54b7 100644 --- a/fs/afs/inode.c +++ b/fs/afs/inode.c @@ -647,7 +647,7 @@ void afs_evict_inode(struct inode *inode) truncate_inode_pages_final(&inode->i_data); afs_set_cache_aux(vnode, &aux); - fscache_clear_inode_writeback(afs_vnode_cache(vnode), inode, &aux); + netfs_clear_inode_writeback(inode, &aux); clear_inode(inode); while (!list_empty(&vnode->wb_keys)) { diff --git a/fs/afs/internal.h b/fs/afs/internal.h index f360726f6082..379fcd698062 100644 --- a/fs/afs/internal.h +++ b/fs/afs/internal.h @@ -1166,7 +1166,6 @@ extern int afs_release(struct inode *, struct file *); extern int afs_fetch_data(struct afs_vnode *, struct afs_read *); extern struct afs_read *afs_alloc_read(gfp_t); extern void afs_put_read(struct afs_read *); -extern int afs_write_inode(struct inode *, struct writeback_control *); static inline struct afs_read *afs_get_read(struct afs_read *req) { @@ -1658,11 +1657,6 @@ bool afs_try_get_volume(struct afs_volume *volume, enum afs_volume_trace reason) /* * write.c */ -#ifdef CONFIG_AFS_FSCACHE -bool afs_dirty_folio(struct address_space *, struct folio *); -#else -#define afs_dirty_folio filemap_dirty_folio -#endif extern int afs_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, struct page **pagep, void **fsdata); diff --git a/fs/afs/super.c b/fs/afs/super.c index ae2d66a52add..f3ba1c3e72f5 100644 --- a/fs/afs/super.c +++ b/fs/afs/super.c @@ -55,7 +55,7 @@ int afs_net_id; static const struct super_operations afs_super_ops = { .statfs = afs_statfs, .alloc_inode = afs_alloc_inode, - .write_inode = afs_write_inode, + .write_inode = netfs_unpin_writeback, .drop_inode = afs_drop_inode, .destroy_inode = afs_destroy_inode, .free_inode = afs_free_inode, diff --git a/fs/afs/write.c b/fs/afs/write.c index 61d34ad2ca7d..62e1cc5985c4 100644 --- a/fs/afs/write.c +++ b/fs/afs/write.c @@ -23,15 +23,6 @@ static void afs_write_to_cache(struct afs_vnode *vnode, loff_t start, size_t len loff_t i_size, bool caching); #ifdef CONFIG_AFS_FSCACHE -/* - * Mark a page as having been made dirty and thus needing writeback. We also - * need to pin the cache object to write back to. - */ -bool afs_dirty_folio(struct address_space *mapping, struct folio *folio) -{ - return fscache_dirty_folio(mapping, folio, - afs_vnode_cache(AFS_FS_I(mapping->host))); -} static void afs_folio_start_fscache(bool caching, struct folio *folio) { if (caching) diff --git a/fs/ceph/cache.h b/fs/ceph/cache.h index b804f1094764..8fc7d828d990 100644 --- a/fs/ceph/cache.h +++ b/fs/ceph/cache.h @@ -43,19 +43,13 @@ static inline void ceph_fscache_resize(struct inode *inode, loff_t to) } } -static inline void ceph_fscache_unpin_writeback(struct inode *inode, +static inline int ceph_fscache_unpin_writeback(struct inode *inode, struct writeback_control *wbc) { - fscache_unpin_writeback(wbc, ceph_fscache_cookie(ceph_inode(inode))); + return netfs_unpin_writeback(inode, wbc); } -static inline int ceph_fscache_dirty_folio(struct address_space *mapping, - struct folio *folio) -{ - struct ceph_inode_info *ci = ceph_inode(mapping->host); - - return fscache_dirty_folio(mapping, folio, ceph_fscache_cookie(ci)); -} +#define ceph_fscache_dirty_folio netfs_dirty_folio static inline bool ceph_is_cache_enabled(struct inode *inode) { @@ -112,16 +106,13 @@ static inline void ceph_fscache_resize(struct inode *inode, loff_t to) { } -static inline void ceph_fscache_unpin_writeback(struct inode *inode, - struct writeback_control *wbc) +static inline int ceph_fscache_unpin_writeback(struct inode *inode, + struct writeback_control *wbc) { + return 0; } -static inline int ceph_fscache_dirty_folio(struct address_space *mapping, - struct folio *folio) -{ - return filemap_dirty_folio(mapping, folio); -} +#define ceph_fscache_dirty_folio filemap_dirty_folio static inline bool ceph_is_cache_enabled(struct inode *inode) { diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 0679240f06db..3149d79a9dbe 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -694,7 +694,7 @@ void ceph_evict_inode(struct inode *inode) percpu_counter_dec(&mdsc->metric.total_inodes); truncate_inode_pages_final(&inode->i_data); - if (inode->i_state & I_PINNING_FSCACHE_WB) + if (inode->i_state & I_PINNING_NETFS_WB) ceph_fscache_unuse_cookie(inode, true); clear_inode(inode); diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index a66c9d0556dc..3c9e4256a6d3 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -1675,11 +1675,11 @@ __writeback_single_inode(struct inode *inode, struct writeback_control *wbc) if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) inode->i_state |= I_DIRTY_PAGES; - else if (unlikely(inode->i_state & I_PINNING_FSCACHE_WB)) { + else if (unlikely(inode->i_state & I_PINNING_NETFS_WB)) { if (!(inode->i_state & I_DIRTY_PAGES)) { - inode->i_state &= ~I_PINNING_FSCACHE_WB; - wbc->unpinned_fscache_wb = true; - dirty |= I_PINNING_FSCACHE_WB; /* Cause write_inode */ + inode->i_state &= ~I_PINNING_NETFS_WB; + wbc->unpinned_netfs_wb = true; + dirty |= I_PINNING_NETFS_WB; /* Cause write_inode */ } } @@ -1691,7 +1691,7 @@ __writeback_single_inode(struct inode *inode, struct writeback_control *wbc) if (ret == 0) ret = err; } - wbc->unpinned_fscache_wb = false; + wbc->unpinned_netfs_wb = false; trace_writeback_single_inode(inode, wbc, nr_to_write); return ret; } diff --git a/fs/netfs/Makefile b/fs/netfs/Makefile index b57162ef9cfb..a84fe9bbd3c4 100644 --- a/fs/netfs/Makefile +++ b/fs/netfs/Makefile @@ -5,6 +5,7 @@ netfs-y := \ io.o \ iterator.o \ main.o \ + misc.o \ objects.o netfs-$(CONFIG_NETFS_STATS) += stats.o diff --git a/fs/netfs/fscache_io.c b/fs/netfs/fscache_io.c index 0d2b8dec8f82..79171a687930 100644 --- a/fs/netfs/fscache_io.c +++ b/fs/netfs/fscache_io.c @@ -158,46 +158,6 @@ int __fscache_begin_write_operation(struct netfs_cache_resources *cres, } EXPORT_SYMBOL(__fscache_begin_write_operation); -/** - * fscache_dirty_folio - Mark folio dirty and pin a cache object for writeback - * @mapping: The mapping the folio belongs to. - * @folio: The folio being dirtied. - * @cookie: The cookie referring to the cache object - * - * Set the dirty flag on a folio and pin an in-use cache object in memory - * so that writeback can later write to it. This is intended - * to be called from the filesystem's ->dirty_folio() method. - * - * Return: true if the dirty flag was set on the folio, false otherwise. - */ -bool fscache_dirty_folio(struct address_space *mapping, struct folio *folio, - struct fscache_cookie *cookie) -{ - struct inode *inode = mapping->host; - bool need_use = false; - - _enter(""); - - if (!filemap_dirty_folio(mapping, folio)) - return false; - if (!fscache_cookie_valid(cookie)) - return true; - - if (!(inode->i_state & I_PINNING_FSCACHE_WB)) { - spin_lock(&inode->i_lock); - if (!(inode->i_state & I_PINNING_FSCACHE_WB)) { - inode->i_state |= I_PINNING_FSCACHE_WB; - need_use = true; - } - spin_unlock(&inode->i_lock); - - if (need_use) - fscache_use_cookie(cookie, true); - } - return true; -} -EXPORT_SYMBOL(fscache_dirty_folio); - struct fscache_write_request { struct netfs_cache_resources cache_resources; struct address_space *mapping; diff --git a/fs/netfs/misc.c b/fs/netfs/misc.c new file mode 100644 index 000000000000..68baf55c47a4 --- /dev/null +++ b/fs/netfs/misc.c @@ -0,0 +1,86 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Miscellaneous routines. + * + * Copyright (C) 2023 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + */ + +#include <linux/swap.h> +#include "internal.h" + +/** + * netfs_dirty_folio - Mark folio dirty and pin a cache object for writeback + * @mapping: The mapping the folio belongs to. + * @folio: The folio being dirtied. + * + * Set the dirty flag on a folio and pin an in-use cache object in memory so + * that writeback can later write to it. This is intended to be called from + * the filesystem's ->dirty_folio() method. + * + * Return: true if the dirty flag was set on the folio, false otherwise. + */ +bool netfs_dirty_folio(struct address_space *mapping, struct folio *folio) +{ + struct inode *inode = mapping->host; + struct netfs_inode *ictx = netfs_inode(inode); + struct fscache_cookie *cookie = netfs_i_cookie(ictx); + bool need_use = false; + + _enter(""); + + if (!filemap_dirty_folio(mapping, folio)) + return false; + if (!fscache_cookie_valid(cookie)) + return true; + + if (!(inode->i_state & I_PINNING_NETFS_WB)) { + spin_lock(&inode->i_lock); + if (!(inode->i_state & I_PINNING_NETFS_WB)) { + inode->i_state |= I_PINNING_NETFS_WB; + need_use = true; + } + spin_unlock(&inode->i_lock); + + if (need_use) + fscache_use_cookie(cookie, true); + } + return true; +} +EXPORT_SYMBOL(netfs_dirty_folio); + +/** + * netfs_unpin_writeback - Unpin writeback resources + * @inode: The inode on which the cookie resides + * @wbc: The writeback control + * + * Unpin the writeback resources pinned by netfs_dirty_folio(). This is + * intended to be called as/by the netfs's ->write_inode() method. + */ +int netfs_unpin_writeback(struct inode *inode, struct writeback_control *wbc) +{ + struct fscache_cookie *cookie = netfs_i_cookie(netfs_inode(inode)); + + if (wbc->unpinned_netfs_wb) + fscache_unuse_cookie(cookie, NULL, NULL); + return 0; +} +EXPORT_SYMBOL(netfs_unpin_writeback); + +/** + * netfs_clear_inode_writeback - Clear writeback resources pinned by an inode + * @inode: The inode to clean up + * @aux: Auxiliary data to apply to the inode + * + * Clear any writeback resources held by an inode when the inode is evicted. + * This must be called before clear_inode() is called. + */ +void netfs_clear_inode_writeback(struct inode *inode, const void *aux) +{ + struct fscache_cookie *cookie = netfs_i_cookie(netfs_inode(inode)); + + if (inode->i_state & I_PINNING_NETFS_WB) { + loff_t i_size = i_size_read(inode); + fscache_unuse_cookie(cookie, aux, &i_size); + } +} +EXPORT_SYMBOL(netfs_clear_inode_writeback); diff --git a/fs/smb/client/cifsfs.c b/fs/smb/client/cifsfs.c index 2131638f26d0..96a65cf9b5ec 100644 --- a/fs/smb/client/cifsfs.c +++ b/fs/smb/client/cifsfs.c @@ -429,7 +429,7 @@ static void cifs_evict_inode(struct inode *inode) { truncate_inode_pages_final(&inode->i_data); - if (inode->i_state & I_PINNING_FSCACHE_WB) + if (inode->i_state & I_PINNING_NETFS_WB) cifs_fscache_unuse_inode_cookie(inode, true); cifs_fscache_release_inode_cookie(inode); clear_inode(inode); @@ -792,8 +792,7 @@ static int cifs_show_stats(struct seq_file *s, struct dentry *root) static int cifs_write_inode(struct inode *inode, struct writeback_control *wbc) { - fscache_unpin_writeback(wbc, cifs_inode_cookie(inode)); - return 0; + return netfs_unpin_writeback(inode, wbc); } static int cifs_drop_inode(struct inode *inode) diff --git a/fs/smb/client/file.c b/fs/smb/client/file.c index 45ca492c141c..b25cace63768 100644 --- a/fs/smb/client/file.c +++ b/fs/smb/client/file.c @@ -5041,27 +5041,13 @@ 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 bool cifs_dirty_folio(struct address_space *mapping, struct folio *folio) -{ - return fscache_dirty_folio(mapping, folio, - cifs_inode_cookie(mapping->host)); -} -#else -#define cifs_dirty_folio filemap_dirty_folio -#endif - const struct address_space_operations cifs_addr_ops = { .read_folio = cifs_read_folio, .readahead = cifs_readahead, .writepages = cifs_writepages, .write_begin = cifs_write_begin, .write_end = cifs_write_end, - .dirty_folio = cifs_dirty_folio, + .dirty_folio = netfs_dirty_folio, .release_folio = cifs_release_folio, .direct_IO = cifs_direct_io, .invalidate_folio = cifs_invalidate_folio, @@ -5085,7 +5071,7 @@ const struct address_space_operations cifs_addr_ops_smallbuf = { .writepages = cifs_writepages, .write_begin = cifs_write_begin, .write_end = cifs_write_end, - .dirty_folio = cifs_dirty_folio, + .dirty_folio = netfs_dirty_folio, .release_folio = cifs_release_folio, .invalidate_folio = cifs_invalidate_folio, .launder_folio = cifs_launder_folio, diff --git a/include/linux/fs.h b/include/linux/fs.h index 897c63c64556..f4fd7f80ce93 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2373,7 +2373,7 @@ static inline void kiocb_clone(struct kiocb *kiocb, struct kiocb *kiocb_src, #define I_CREATING (1 << 15) #define I_DONTCACHE (1 << 16) #define I_SYNC_QUEUED (1 << 17) -#define I_PINNING_FSCACHE_WB (1 << 18) +#define I_PINNING_NETFS_WB (1 << 18) #define I_DIRTY_INODE (I_DIRTY_SYNC | I_DIRTY_DATASYNC) #define I_DIRTY (I_DIRTY_INODE | I_DIRTY_PAGES) diff --git a/include/linux/fscache.h b/include/linux/fscache.h index 9ed6696aee7a..6e8562cbcc43 100644 --- a/include/linux/fscache.h +++ b/include/linux/fscache.h @@ -626,48 +626,6 @@ static inline void fscache_write_to_cache(struct fscache_cookie *cookie, } -#if __fscache_available -bool fscache_dirty_folio(struct address_space *mapping, struct folio *folio, - struct fscache_cookie *cookie); -#else -#define fscache_dirty_folio(MAPPING, FOLIO, COOKIE) \ - filemap_dirty_folio(MAPPING, FOLIO) -#endif - -/** - * fscache_unpin_writeback - Unpin writeback resources - * @wbc: The writeback control - * @cookie: The cookie referring to the cache object - * - * Unpin the writeback resources pinned by fscache_dirty_folio(). This is - * intended to be called by the netfs's ->write_inode() method. - */ -static inline void fscache_unpin_writeback(struct writeback_control *wbc, - struct fscache_cookie *cookie) -{ - if (wbc->unpinned_fscache_wb) - fscache_unuse_cookie(cookie, NULL, NULL); -} - -/** - * fscache_clear_inode_writeback - Clear writeback resources pinned by an inode - * @cookie: The cookie referring to the cache object - * @inode: The inode to clean up - * @aux: Auxiliary data to apply to the inode - * - * Clear any writeback resources held by an inode when the inode is evicted. - * This must be called before clear_inode() is called. - */ -static inline void fscache_clear_inode_writeback(struct fscache_cookie *cookie, - struct inode *inode, - const void *aux) -{ - if (inode->i_state & I_PINNING_FSCACHE_WB) { - loff_t i_size = i_size_read(inode); - fscache_unuse_cookie(cookie, aux, &i_size); - } -} - /** * fscache_note_page_release - Note that a netfs page got released * @cookie: The cookie corresponding to the file diff --git a/include/linux/netfs.h b/include/linux/netfs.h index 9bd91cd615d5..32faf6c89702 100644 --- a/include/linux/netfs.h +++ b/include/linux/netfs.h @@ -288,6 +288,9 @@ int netfs_read_folio(struct file *, struct folio *); int netfs_write_begin(struct netfs_inode *, struct file *, struct address_space *, loff_t pos, unsigned int len, struct folio **, void **fsdata); +bool netfs_dirty_folio(struct address_space *mapping, struct folio *folio); +int netfs_unpin_writeback(struct inode *inode, struct writeback_control *wbc); +void netfs_clear_inode_writeback(struct inode *inode, const void *aux); void netfs_subreq_terminated(struct netfs_io_subrequest *, ssize_t, bool); void netfs_get_subrequest(struct netfs_io_subrequest *subreq, diff --git a/include/linux/writeback.h b/include/linux/writeback.h index f47701c114dd..4148d8ffff26 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h @@ -60,7 +60,7 @@ struct writeback_control { unsigned for_reclaim:1; /* Invoked from the page allocator */ unsigned range_cyclic:1; /* range_start is cyclic */ unsigned for_sync:1; /* sync(2) WB_SYNC_ALL writeback */ - unsigned unpinned_fscache_wb:1; /* Cleared I_PINNING_FSCACHE_WB */ + unsigned unpinned_netfs_wb:1; /* Cleared I_PINNING_NETFS_WB */ /* * When writeback IOs are bounced through async layers, only the

[v4,05/39] netfs: Move pinning-for-writeback from fscache to netfs

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Patch