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Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH 01/14] cifs: Add some helper functions From: David Howells To: linux-cachefs@redhat.com Cc: Steve French , Shyam Prasad N , Rohith Surabattula , linux-cifs@vger.kernel.org, dhowells@redhat.com, Steve French , Shyam Prasad N , Rohith Surabattula , Jeff Layton , linux-cifs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Date: Thu, 07 Apr 2022 00:02:45 +0100 Message-ID: <164928616583.457102.15157033997163988344.stgit@warthog.procyon.org.uk> In-Reply-To: <164928615045.457102.10607899252434268982.stgit@warthog.procyon.org.uk> References: <164928615045.457102.10607899252434268982.stgit@warthog.procyon.org.uk> User-Agent: StGit/1.4 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.7 X-Stat-Signature: 5x98mngowm9a88cqa368ygcfci7jpzjy Authentication-Results: imf02.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b="iiWbs/nZ"; spf=none (imf02.hostedemail.com: domain of dhowells@redhat.com has no SPF policy when checking 170.10.129.124) smtp.mailfrom=dhowells@redhat.com; dmarc=pass (policy=none) header.from=redhat.com X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: C01B380003 X-HE-Tag: 1649286180-607712 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: Add some helper functions to manipulate the folio marks by iterating through a list of folios held in an xarray rather than using a page list. Signed-off-by: David Howells cc: Steve French cc: Shyam Prasad N cc: Rohith Surabattula cc: linux-cifs@vger.kernel.org --- fs/cifs/cifsfs.h | 3 ++ fs/cifs/cifssmb.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 88 insertions(+) diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h index 15a5c5db038b..1c77bbc0815f 100644 --- a/fs/cifs/cifsfs.h +++ b/fs/cifs/cifsfs.h @@ -110,6 +110,9 @@ extern int cifs_file_strict_mmap(struct file * , struct vm_area_struct *); extern const struct file_operations cifs_dir_ops; extern int cifs_dir_open(struct inode *inode, struct file *file); extern int cifs_readdir(struct file *file, struct dir_context *ctx); +extern void cifs_pages_written_back(struct inode *inode, loff_t start, unsigned int len); +extern void cifs_pages_write_failed(struct inode *inode, loff_t start, unsigned int len); +extern void cifs_pages_write_redirty(struct inode *inode, loff_t start, unsigned int len); /* Functions related to dir entries */ extern const struct dentry_operations cifs_dentry_ops; diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 47e927c4ff8d..88e2de74f74f 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -27,6 +27,7 @@ #include "cifsglob.h" #include "cifsacl.h" #include "cifsproto.h" +#include "cifsfs.h" #include "cifs_unicode.h" #include "cifs_debug.h" #include "smb2proto.h" @@ -1928,6 +1929,90 @@ cifs_writedata_release(struct kref *refcount) kfree(wdata); } +/* + * Completion of write to server. + */ +void cifs_pages_written_back(struct inode *inode, loff_t start, unsigned int len) +{ + struct address_space *mapping = inode->i_mapping; + struct folio *folio; + pgoff_t end; + + XA_STATE(xas, &mapping->i_pages, start / PAGE_SIZE); + + rcu_read_lock(); + + end = (start + len - 1) / PAGE_SIZE; + xas_for_each(&xas, folio, end) { + if (!folio_test_writeback(folio)) { + pr_err("bad %x @%llx page %lx %lx\n", + len, start, folio_index(folio), end); + BUG(); + } + + folio_detach_private(folio); + folio_end_writeback(folio); + } + + rcu_read_unlock(); +} + +/* + * Failure of write to server. + */ +void cifs_pages_write_failed(struct inode *inode, loff_t start, unsigned int len) +{ + struct address_space *mapping = inode->i_mapping; + struct folio *folio; + pgoff_t end; + + XA_STATE(xas, &mapping->i_pages, start / PAGE_SIZE); + + rcu_read_lock(); + + end = (start + len - 1) / PAGE_SIZE; + xas_for_each(&xas, folio, end) { + if (!folio_test_writeback(folio)) { + pr_err("bad %x @%llx page %lx %lx\n", + len, start, folio_index(folio), end); + BUG(); + } + + folio_set_error(folio); + folio_end_writeback(folio); + } + + rcu_read_unlock(); +} + +/* + * Redirty pages after a temporary failure. + */ +void cifs_pages_write_redirty(struct inode *inode, loff_t start, unsigned int len) +{ + struct address_space *mapping = inode->i_mapping; + struct folio *folio; + pgoff_t end; + + XA_STATE(xas, &mapping->i_pages, start / PAGE_SIZE); + + rcu_read_lock(); + + end = (start + len - 1) / PAGE_SIZE; + xas_for_each(&xas, folio, end) { + if (!folio_test_writeback(folio)) { + pr_err("bad %x @%llx page %lx %lx\n", + len, start, folio_index(folio), end); + BUG(); + } + + filemap_dirty_folio(folio->mapping, folio); + folio_end_writeback(folio); + } + + rcu_read_unlock(); +} + /* * Write failed with a retryable error. Resend the write request. It's also * possible that the page was redirtied so re-clean the page.