131143d5dSDavid Howells /* handling of writes to regular files and writing back to the server 231143d5dSDavid Howells * 331143d5dSDavid Howells * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 431143d5dSDavid Howells * Written by David Howells (dhowells@redhat.com) 531143d5dSDavid Howells * 631143d5dSDavid Howells * This program is free software; you can redistribute it and/or 731143d5dSDavid Howells * modify it under the terms of the GNU General Public License 831143d5dSDavid Howells * as published by the Free Software Foundation; either version 931143d5dSDavid Howells * 2 of the License, or (at your option) any later version. 1031143d5dSDavid Howells */ 114343d008SDavid Howells 124af3c9ccSAlexey Dobriyan #include <linux/backing-dev.h> 1331143d5dSDavid Howells #include <linux/slab.h> 1431143d5dSDavid Howells #include <linux/fs.h> 1531143d5dSDavid Howells #include <linux/pagemap.h> 1631143d5dSDavid Howells #include <linux/writeback.h> 1731143d5dSDavid Howells #include <linux/pagevec.h> 1831143d5dSDavid Howells #include "internal.h" 1931143d5dSDavid Howells 2031143d5dSDavid Howells /* 2131143d5dSDavid Howells * mark a page as having been made dirty and thus needing writeback 2231143d5dSDavid Howells */ 2331143d5dSDavid Howells int afs_set_page_dirty(struct page *page) 2431143d5dSDavid Howells { 2531143d5dSDavid Howells _enter(""); 2631143d5dSDavid Howells return __set_page_dirty_nobuffers(page); 2731143d5dSDavid Howells } 2831143d5dSDavid Howells 2931143d5dSDavid Howells /* 3031143d5dSDavid Howells * partly or wholly fill a page that's under preparation for writing 3131143d5dSDavid Howells */ 3231143d5dSDavid Howells static int afs_fill_page(struct afs_vnode *vnode, struct key *key, 33e8e581a8SDavid Howells loff_t pos, unsigned int len, struct page *page) 3431143d5dSDavid Howells { 35196ee9cdSDavid Howells struct afs_read *req; 3631143d5dSDavid Howells int ret; 3731143d5dSDavid Howells 385e7f2337SAnton Blanchard _enter(",,%llu", (unsigned long long)pos); 3931143d5dSDavid Howells 40196ee9cdSDavid Howells req = kzalloc(sizeof(struct afs_read) + sizeof(struct page *), 41196ee9cdSDavid Howells GFP_KERNEL); 42196ee9cdSDavid Howells if (!req) 43196ee9cdSDavid Howells return -ENOMEM; 44196ee9cdSDavid Howells 45f3ddee8dSDavid Howells refcount_set(&req->usage, 1); 46196ee9cdSDavid Howells req->pos = pos; 47e8e581a8SDavid Howells req->len = len; 48196ee9cdSDavid Howells req->nr_pages = 1; 49f3ddee8dSDavid Howells req->pages = req->array; 50196ee9cdSDavid Howells req->pages[0] = page; 515611ef28SDavid Howells get_page(page); 52196ee9cdSDavid Howells 53d2ddc776SDavid Howells ret = afs_fetch_data(vnode, key, req); 54196ee9cdSDavid Howells afs_put_read(req); 5531143d5dSDavid Howells if (ret < 0) { 5631143d5dSDavid Howells if (ret == -ENOENT) { 5731143d5dSDavid Howells _debug("got NOENT from server" 5831143d5dSDavid Howells " - marking file deleted and stale"); 5931143d5dSDavid Howells set_bit(AFS_VNODE_DELETED, &vnode->flags); 6031143d5dSDavid Howells ret = -ESTALE; 6131143d5dSDavid Howells } 6231143d5dSDavid Howells } 6331143d5dSDavid Howells 6431143d5dSDavid Howells _leave(" = %d", ret); 6531143d5dSDavid Howells return ret; 6631143d5dSDavid Howells } 6731143d5dSDavid Howells 6831143d5dSDavid Howells /* 6931143d5dSDavid Howells * prepare to perform part of a write to a page 7031143d5dSDavid Howells */ 7115b4650eSNick Piggin int afs_write_begin(struct file *file, struct address_space *mapping, 7215b4650eSNick Piggin loff_t pos, unsigned len, unsigned flags, 7315b4650eSNick Piggin struct page **pagep, void **fsdata) 7431143d5dSDavid Howells { 75496ad9aaSAl Viro struct afs_vnode *vnode = AFS_FS_I(file_inode(file)); 7615b4650eSNick Piggin struct page *page; 77215804a9SDavid Howells struct key *key = afs_file_key(file); 784343d008SDavid Howells unsigned long priv; 794343d008SDavid Howells unsigned f, from = pos & (PAGE_SIZE - 1); 804343d008SDavid Howells unsigned t, to = from + len; 8109cbfeafSKirill A. Shutemov pgoff_t index = pos >> PAGE_SHIFT; 8231143d5dSDavid Howells int ret; 8331143d5dSDavid Howells 8431143d5dSDavid Howells _enter("{%x:%u},{%lx},%u,%u", 8515b4650eSNick Piggin vnode->fid.vid, vnode->fid.vnode, index, from, to); 8631143d5dSDavid Howells 874343d008SDavid Howells /* We want to store information about how much of a page is altered in 884343d008SDavid Howells * page->private. 894343d008SDavid Howells */ 904343d008SDavid Howells BUILD_BUG_ON(PAGE_SIZE > 32768 && sizeof(page->private) < 8); 9131143d5dSDavid Howells 9254566b2cSNick Piggin page = grab_cache_page_write_begin(mapping, index, flags); 934343d008SDavid Howells if (!page) 9415b4650eSNick Piggin return -ENOMEM; 9515b4650eSNick Piggin 9609cbfeafSKirill A. Shutemov if (!PageUptodate(page) && len != PAGE_SIZE) { 97e8e581a8SDavid Howells ret = afs_fill_page(vnode, key, pos & PAGE_MASK, PAGE_SIZE, page); 9831143d5dSDavid Howells if (ret < 0) { 996d06b0d2SDavid Howells unlock_page(page); 1006d06b0d2SDavid Howells put_page(page); 10131143d5dSDavid Howells _leave(" = %d [prep]", ret); 10231143d5dSDavid Howells return ret; 10331143d5dSDavid Howells } 10415b4650eSNick Piggin SetPageUptodate(page); 10531143d5dSDavid Howells } 10631143d5dSDavid Howells 1076d06b0d2SDavid Howells /* page won't leak in error case: it eventually gets cleaned off LRU */ 1086d06b0d2SDavid Howells *pagep = page; 1096d06b0d2SDavid Howells 11031143d5dSDavid Howells try_again: 1114343d008SDavid Howells /* See if this page is already partially written in a way that we can 1124343d008SDavid Howells * merge the new write with. 1134343d008SDavid Howells */ 1144343d008SDavid Howells t = f = 0; 1154343d008SDavid Howells if (PagePrivate(page)) { 1164343d008SDavid Howells priv = page_private(page); 1174343d008SDavid Howells f = priv & AFS_PRIV_MAX; 1184343d008SDavid Howells t = priv >> AFS_PRIV_SHIFT; 1194343d008SDavid Howells ASSERTCMP(f, <=, t); 12031143d5dSDavid Howells } 12131143d5dSDavid Howells 1224343d008SDavid Howells if (f != t) { 1235a039c32SDavid Howells if (PageWriteback(page)) { 1245a039c32SDavid Howells trace_afs_page_dirty(vnode, tracepoint_string("alrdy"), 1255a039c32SDavid Howells page->index, priv); 1265a039c32SDavid Howells goto flush_conflicting_write; 1275a039c32SDavid Howells } 1285a813276SDavid Howells /* If the file is being filled locally, allow inter-write 1295a813276SDavid Howells * spaces to be merged into writes. If it's not, only write 1305a813276SDavid Howells * back what the user gives us. 1315a813276SDavid Howells */ 1325a813276SDavid Howells if (!test_bit(AFS_VNODE_NEW_CONTENT, &vnode->flags) && 1335a813276SDavid Howells (to < f || from > t)) 1344343d008SDavid Howells goto flush_conflicting_write; 1354343d008SDavid Howells if (from < f) 1364343d008SDavid Howells f = from; 1374343d008SDavid Howells if (to > t) 1384343d008SDavid Howells t = to; 1394343d008SDavid Howells } else { 1404343d008SDavid Howells f = from; 1414343d008SDavid Howells t = to; 14231143d5dSDavid Howells } 14331143d5dSDavid Howells 1444343d008SDavid Howells priv = (unsigned long)t << AFS_PRIV_SHIFT; 1454343d008SDavid Howells priv |= f; 14613524ab3SDavid Howells trace_afs_page_dirty(vnode, tracepoint_string("begin"), 14713524ab3SDavid Howells page->index, priv); 14831143d5dSDavid Howells SetPagePrivate(page); 1494343d008SDavid Howells set_page_private(page, priv); 1504343d008SDavid Howells _leave(" = 0"); 15131143d5dSDavid Howells return 0; 15231143d5dSDavid Howells 1534343d008SDavid Howells /* The previous write and this write aren't adjacent or overlapping, so 1544343d008SDavid Howells * flush the page out. 1554343d008SDavid Howells */ 1564343d008SDavid Howells flush_conflicting_write: 15731143d5dSDavid Howells _debug("flush conflict"); 1584343d008SDavid Howells ret = write_one_page(page); 15931143d5dSDavid Howells if (ret < 0) { 16031143d5dSDavid Howells _leave(" = %d", ret); 16131143d5dSDavid Howells return ret; 16231143d5dSDavid Howells } 16331143d5dSDavid Howells 1644343d008SDavid Howells ret = lock_page_killable(page); 1654343d008SDavid Howells if (ret < 0) { 1664343d008SDavid Howells _leave(" = %d", ret); 1674343d008SDavid Howells return ret; 1684343d008SDavid Howells } 16931143d5dSDavid Howells goto try_again; 17031143d5dSDavid Howells } 17131143d5dSDavid Howells 17231143d5dSDavid Howells /* 17331143d5dSDavid Howells * finalise part of a write to a page 17431143d5dSDavid Howells */ 17515b4650eSNick Piggin int afs_write_end(struct file *file, struct address_space *mapping, 17615b4650eSNick Piggin loff_t pos, unsigned len, unsigned copied, 17715b4650eSNick Piggin struct page *page, void *fsdata) 17831143d5dSDavid Howells { 179496ad9aaSAl Viro struct afs_vnode *vnode = AFS_FS_I(file_inode(file)); 180215804a9SDavid Howells struct key *key = afs_file_key(file); 18131143d5dSDavid Howells loff_t i_size, maybe_i_size; 182e8e581a8SDavid Howells int ret; 18331143d5dSDavid Howells 18415b4650eSNick Piggin _enter("{%x:%u},{%lx}", 18515b4650eSNick Piggin vnode->fid.vid, vnode->fid.vnode, page->index); 18631143d5dSDavid Howells 18715b4650eSNick Piggin maybe_i_size = pos + copied; 18831143d5dSDavid Howells 18931143d5dSDavid Howells i_size = i_size_read(&vnode->vfs_inode); 19031143d5dSDavid Howells if (maybe_i_size > i_size) { 1914343d008SDavid Howells spin_lock(&vnode->wb_lock); 19231143d5dSDavid Howells i_size = i_size_read(&vnode->vfs_inode); 19331143d5dSDavid Howells if (maybe_i_size > i_size) 19431143d5dSDavid Howells i_size_write(&vnode->vfs_inode, maybe_i_size); 1954343d008SDavid Howells spin_unlock(&vnode->wb_lock); 19631143d5dSDavid Howells } 19731143d5dSDavid Howells 198e8e581a8SDavid Howells if (!PageUptodate(page)) { 199e8e581a8SDavid Howells if (copied < len) { 200e8e581a8SDavid Howells /* Try and load any missing data from the server. The 201e8e581a8SDavid Howells * unmarshalling routine will take care of clearing any 202e8e581a8SDavid Howells * bits that are beyond the EOF. 203e8e581a8SDavid Howells */ 204e8e581a8SDavid Howells ret = afs_fill_page(vnode, key, pos + copied, 205e8e581a8SDavid Howells len - copied, page); 206e8e581a8SDavid Howells if (ret < 0) 207afae457dSDavid Howells goto out; 208e8e581a8SDavid Howells } 209e8e581a8SDavid Howells SetPageUptodate(page); 210e8e581a8SDavid Howells } 211e8e581a8SDavid Howells 21231143d5dSDavid Howells set_page_dirty(page); 21331143d5dSDavid Howells if (PageDirty(page)) 21431143d5dSDavid Howells _debug("dirtied"); 215afae457dSDavid Howells ret = copied; 216afae457dSDavid Howells 217afae457dSDavid Howells out: 21815b4650eSNick Piggin unlock_page(page); 21909cbfeafSKirill A. Shutemov put_page(page); 220afae457dSDavid Howells return ret; 22131143d5dSDavid Howells } 22231143d5dSDavid Howells 22331143d5dSDavid Howells /* 22431143d5dSDavid Howells * kill all the pages in the given range 22531143d5dSDavid Howells */ 2264343d008SDavid Howells static void afs_kill_pages(struct address_space *mapping, 22731143d5dSDavid Howells pgoff_t first, pgoff_t last) 22831143d5dSDavid Howells { 2294343d008SDavid Howells struct afs_vnode *vnode = AFS_FS_I(mapping->host); 23031143d5dSDavid Howells struct pagevec pv; 23131143d5dSDavid Howells unsigned count, loop; 23231143d5dSDavid Howells 23331143d5dSDavid Howells _enter("{%x:%u},%lx-%lx", 23431143d5dSDavid Howells vnode->fid.vid, vnode->fid.vnode, first, last); 23531143d5dSDavid Howells 23686679820SMel Gorman pagevec_init(&pv); 23731143d5dSDavid Howells 23831143d5dSDavid Howells do { 23931143d5dSDavid Howells _debug("kill %lx-%lx", first, last); 24031143d5dSDavid Howells 24131143d5dSDavid Howells count = last - first + 1; 24231143d5dSDavid Howells if (count > PAGEVEC_SIZE) 24331143d5dSDavid Howells count = PAGEVEC_SIZE; 2444343d008SDavid Howells pv.nr = find_get_pages_contig(mapping, first, count, pv.pages); 24531143d5dSDavid Howells ASSERTCMP(pv.nr, ==, count); 24631143d5dSDavid Howells 24731143d5dSDavid Howells for (loop = 0; loop < count; loop++) { 2487286a35eSDavid Howells struct page *page = pv.pages[loop]; 2497286a35eSDavid Howells ClearPageUptodate(page); 2507286a35eSDavid Howells SetPageError(page); 2514343d008SDavid Howells end_page_writeback(page); 2524343d008SDavid Howells if (page->index >= first) 2534343d008SDavid Howells first = page->index + 1; 2544343d008SDavid Howells lock_page(page); 2554343d008SDavid Howells generic_error_remove_page(mapping, page); 2564343d008SDavid Howells } 2574343d008SDavid Howells 2584343d008SDavid Howells __pagevec_release(&pv); 2594343d008SDavid Howells } while (first <= last); 2604343d008SDavid Howells 2614343d008SDavid Howells _leave(""); 2624343d008SDavid Howells } 2634343d008SDavid Howells 2644343d008SDavid Howells /* 2654343d008SDavid Howells * Redirty all the pages in a given range. 2664343d008SDavid Howells */ 2674343d008SDavid Howells static void afs_redirty_pages(struct writeback_control *wbc, 2684343d008SDavid Howells struct address_space *mapping, 2694343d008SDavid Howells pgoff_t first, pgoff_t last) 2704343d008SDavid Howells { 2714343d008SDavid Howells struct afs_vnode *vnode = AFS_FS_I(mapping->host); 2724343d008SDavid Howells struct pagevec pv; 2734343d008SDavid Howells unsigned count, loop; 2744343d008SDavid Howells 2754343d008SDavid Howells _enter("{%x:%u},%lx-%lx", 2764343d008SDavid Howells vnode->fid.vid, vnode->fid.vnode, first, last); 2774343d008SDavid Howells 278487e2c9fSLinus Torvalds pagevec_init(&pv); 2794343d008SDavid Howells 2804343d008SDavid Howells do { 2814343d008SDavid Howells _debug("redirty %lx-%lx", first, last); 2824343d008SDavid Howells 2834343d008SDavid Howells count = last - first + 1; 2844343d008SDavid Howells if (count > PAGEVEC_SIZE) 2854343d008SDavid Howells count = PAGEVEC_SIZE; 2864343d008SDavid Howells pv.nr = find_get_pages_contig(mapping, first, count, pv.pages); 2874343d008SDavid Howells ASSERTCMP(pv.nr, ==, count); 2884343d008SDavid Howells 2894343d008SDavid Howells for (loop = 0; loop < count; loop++) { 2904343d008SDavid Howells struct page *page = pv.pages[loop]; 2914343d008SDavid Howells 2924343d008SDavid Howells redirty_page_for_writepage(wbc, page); 2937286a35eSDavid Howells end_page_writeback(page); 2947286a35eSDavid Howells if (page->index >= first) 2957286a35eSDavid Howells first = page->index + 1; 29631143d5dSDavid Howells } 29731143d5dSDavid Howells 29831143d5dSDavid Howells __pagevec_release(&pv); 2994343d008SDavid Howells } while (first <= last); 30031143d5dSDavid Howells 30131143d5dSDavid Howells _leave(""); 30231143d5dSDavid Howells } 30331143d5dSDavid Howells 30431143d5dSDavid Howells /* 305d2ddc776SDavid Howells * write to a file 30631143d5dSDavid Howells */ 3074343d008SDavid Howells static int afs_store_data(struct address_space *mapping, 3084343d008SDavid Howells pgoff_t first, pgoff_t last, 309d2ddc776SDavid Howells unsigned offset, unsigned to) 31031143d5dSDavid Howells { 3114343d008SDavid Howells struct afs_vnode *vnode = AFS_FS_I(mapping->host); 312d2ddc776SDavid Howells struct afs_fs_cursor fc; 3134343d008SDavid Howells struct afs_wb_key *wbk = NULL; 3144343d008SDavid Howells struct list_head *p; 3154343d008SDavid Howells int ret = -ENOKEY, ret2; 316d2ddc776SDavid Howells 3174343d008SDavid Howells _enter("%s{%x:%u.%u},%lx,%lx,%x,%x", 318d2ddc776SDavid Howells vnode->volume->name, 319d2ddc776SDavid Howells vnode->fid.vid, 320d2ddc776SDavid Howells vnode->fid.vnode, 321d2ddc776SDavid Howells vnode->fid.unique, 322d2ddc776SDavid Howells first, last, offset, to); 323d2ddc776SDavid Howells 3244343d008SDavid Howells spin_lock(&vnode->wb_lock); 3254343d008SDavid Howells p = vnode->wb_keys.next; 3264343d008SDavid Howells 3274343d008SDavid Howells /* Iterate through the list looking for a valid key to use. */ 3284343d008SDavid Howells try_next_key: 3294343d008SDavid Howells while (p != &vnode->wb_keys) { 3304343d008SDavid Howells wbk = list_entry(p, struct afs_wb_key, vnode_link); 3314343d008SDavid Howells _debug("wbk %u", key_serial(wbk->key)); 3324343d008SDavid Howells ret2 = key_validate(wbk->key); 3334343d008SDavid Howells if (ret2 == 0) 3344343d008SDavid Howells goto found_key; 3354343d008SDavid Howells if (ret == -ENOKEY) 3364343d008SDavid Howells ret = ret2; 3374343d008SDavid Howells p = p->next; 3384343d008SDavid Howells } 3394343d008SDavid Howells 3404343d008SDavid Howells spin_unlock(&vnode->wb_lock); 3414343d008SDavid Howells afs_put_wb_key(wbk); 3424343d008SDavid Howells _leave(" = %d [no keys]", ret); 3434343d008SDavid Howells return ret; 3444343d008SDavid Howells 3454343d008SDavid Howells found_key: 3464343d008SDavid Howells refcount_inc(&wbk->usage); 3474343d008SDavid Howells spin_unlock(&vnode->wb_lock); 3484343d008SDavid Howells 3494343d008SDavid Howells _debug("USE WB KEY %u", key_serial(wbk->key)); 3504343d008SDavid Howells 351d2ddc776SDavid Howells ret = -ERESTARTSYS; 3524343d008SDavid Howells if (afs_begin_vnode_operation(&fc, vnode, wbk->key)) { 353d2ddc776SDavid Howells while (afs_select_fileserver(&fc)) { 35468251f0aSDavid Howells fc.cb_break = afs_calc_vnode_cb_break(vnode); 3554343d008SDavid Howells afs_fs_store_data(&fc, mapping, first, last, offset, to); 356d2ddc776SDavid Howells } 357d2ddc776SDavid Howells 358d2ddc776SDavid Howells afs_check_for_remote_deletion(&fc, fc.vnode); 359d2ddc776SDavid Howells afs_vnode_commit_status(&fc, vnode, fc.cb_break); 360d2ddc776SDavid Howells ret = afs_end_vnode_operation(&fc); 361d2ddc776SDavid Howells } 362d2ddc776SDavid Howells 3634343d008SDavid Howells switch (ret) { 36476a5cb6fSDavid Howells case 0: 36576a5cb6fSDavid Howells afs_stat_v(vnode, n_stores); 36676a5cb6fSDavid Howells atomic_long_add((last * PAGE_SIZE + to) - 36776a5cb6fSDavid Howells (first * PAGE_SIZE + offset), 36876a5cb6fSDavid Howells &afs_v2net(vnode)->n_store_bytes); 36976a5cb6fSDavid Howells break; 3704343d008SDavid Howells case -EACCES: 3714343d008SDavid Howells case -EPERM: 3724343d008SDavid Howells case -ENOKEY: 3734343d008SDavid Howells case -EKEYEXPIRED: 3744343d008SDavid Howells case -EKEYREJECTED: 3754343d008SDavid Howells case -EKEYREVOKED: 3764343d008SDavid Howells _debug("next"); 3774343d008SDavid Howells spin_lock(&vnode->wb_lock); 3784343d008SDavid Howells p = wbk->vnode_link.next; 3794343d008SDavid Howells afs_put_wb_key(wbk); 3804343d008SDavid Howells goto try_next_key; 3814343d008SDavid Howells } 3824343d008SDavid Howells 3834343d008SDavid Howells afs_put_wb_key(wbk); 384d2ddc776SDavid Howells _leave(" = %d", ret); 385d2ddc776SDavid Howells return ret; 386d2ddc776SDavid Howells } 387d2ddc776SDavid Howells 388d2ddc776SDavid Howells /* 3894343d008SDavid Howells * Synchronously write back the locked page and any subsequent non-locked dirty 3904343d008SDavid Howells * pages. 39131143d5dSDavid Howells */ 3924343d008SDavid Howells static int afs_write_back_from_locked_page(struct address_space *mapping, 3934343d008SDavid Howells struct writeback_control *wbc, 3944343d008SDavid Howells struct page *primary_page, 3954343d008SDavid Howells pgoff_t final_page) 39631143d5dSDavid Howells { 39713524ab3SDavid Howells struct afs_vnode *vnode = AFS_FS_I(mapping->host); 39831143d5dSDavid Howells struct page *pages[8], *page; 3994343d008SDavid Howells unsigned long count, priv; 4004343d008SDavid Howells unsigned n, offset, to, f, t; 40131143d5dSDavid Howells pgoff_t start, first, last; 40231143d5dSDavid Howells int loop, ret; 40331143d5dSDavid Howells 40431143d5dSDavid Howells _enter(",%lx", primary_page->index); 40531143d5dSDavid Howells 40631143d5dSDavid Howells count = 1; 40731143d5dSDavid Howells if (test_set_page_writeback(primary_page)) 40831143d5dSDavid Howells BUG(); 40931143d5dSDavid Howells 4104343d008SDavid Howells /* Find all consecutive lockable dirty pages that have contiguous 4114343d008SDavid Howells * written regions, stopping when we find a page that is not 4124343d008SDavid Howells * immediately lockable, is not dirty or is missing, or we reach the 4134343d008SDavid Howells * end of the range. 4144343d008SDavid Howells */ 41531143d5dSDavid Howells start = primary_page->index; 4164343d008SDavid Howells priv = page_private(primary_page); 4174343d008SDavid Howells offset = priv & AFS_PRIV_MAX; 4184343d008SDavid Howells to = priv >> AFS_PRIV_SHIFT; 41913524ab3SDavid Howells trace_afs_page_dirty(vnode, tracepoint_string("store"), 42013524ab3SDavid Howells primary_page->index, priv); 4214343d008SDavid Howells 4224343d008SDavid Howells WARN_ON(offset == to); 42313524ab3SDavid Howells if (offset == to) 42413524ab3SDavid Howells trace_afs_page_dirty(vnode, tracepoint_string("WARN"), 42513524ab3SDavid Howells primary_page->index, priv); 4264343d008SDavid Howells 4275a813276SDavid Howells if (start >= final_page || 4285a813276SDavid Howells (to < PAGE_SIZE && !test_bit(AFS_VNODE_NEW_CONTENT, &vnode->flags))) 42931143d5dSDavid Howells goto no_more; 4304343d008SDavid Howells 43131143d5dSDavid Howells start++; 43231143d5dSDavid Howells do { 43331143d5dSDavid Howells _debug("more %lx [%lx]", start, count); 4344343d008SDavid Howells n = final_page - start + 1; 43531143d5dSDavid Howells if (n > ARRAY_SIZE(pages)) 43631143d5dSDavid Howells n = ARRAY_SIZE(pages); 4374343d008SDavid Howells n = find_get_pages_contig(mapping, start, ARRAY_SIZE(pages), pages); 43831143d5dSDavid Howells _debug("fgpc %u", n); 43931143d5dSDavid Howells if (n == 0) 44031143d5dSDavid Howells goto no_more; 44131143d5dSDavid Howells if (pages[0]->index != start) { 4429d577b6aSDavid Howells do { 4439d577b6aSDavid Howells put_page(pages[--n]); 4449d577b6aSDavid Howells } while (n > 0); 44531143d5dSDavid Howells goto no_more; 44631143d5dSDavid Howells } 44731143d5dSDavid Howells 44831143d5dSDavid Howells for (loop = 0; loop < n; loop++) { 44931143d5dSDavid Howells page = pages[loop]; 4505a813276SDavid Howells if (to != PAGE_SIZE && 4515a813276SDavid Howells !test_bit(AFS_VNODE_NEW_CONTENT, &vnode->flags)) 4525a813276SDavid Howells break; 4534343d008SDavid Howells if (page->index > final_page) 45431143d5dSDavid Howells break; 455529ae9aaSNick Piggin if (!trylock_page(page)) 45631143d5dSDavid Howells break; 4574343d008SDavid Howells if (!PageDirty(page) || PageWriteback(page)) { 45831143d5dSDavid Howells unlock_page(page); 45931143d5dSDavid Howells break; 46031143d5dSDavid Howells } 4614343d008SDavid Howells 4624343d008SDavid Howells priv = page_private(page); 4634343d008SDavid Howells f = priv & AFS_PRIV_MAX; 4644343d008SDavid Howells t = priv >> AFS_PRIV_SHIFT; 4655a813276SDavid Howells if (f != 0 && 4665a813276SDavid Howells !test_bit(AFS_VNODE_NEW_CONTENT, &vnode->flags)) { 4674343d008SDavid Howells unlock_page(page); 4684343d008SDavid Howells break; 4694343d008SDavid Howells } 4704343d008SDavid Howells to = t; 4714343d008SDavid Howells 47213524ab3SDavid Howells trace_afs_page_dirty(vnode, tracepoint_string("store+"), 47313524ab3SDavid Howells page->index, priv); 47413524ab3SDavid Howells 47531143d5dSDavid Howells if (!clear_page_dirty_for_io(page)) 47631143d5dSDavid Howells BUG(); 47731143d5dSDavid Howells if (test_set_page_writeback(page)) 47831143d5dSDavid Howells BUG(); 47931143d5dSDavid Howells unlock_page(page); 48031143d5dSDavid Howells put_page(page); 48131143d5dSDavid Howells } 48231143d5dSDavid Howells count += loop; 48331143d5dSDavid Howells if (loop < n) { 48431143d5dSDavid Howells for (; loop < n; loop++) 48531143d5dSDavid Howells put_page(pages[loop]); 48631143d5dSDavid Howells goto no_more; 48731143d5dSDavid Howells } 48831143d5dSDavid Howells 48931143d5dSDavid Howells start += loop; 4904343d008SDavid Howells } while (start <= final_page && count < 65536); 49131143d5dSDavid Howells 49231143d5dSDavid Howells no_more: 4934343d008SDavid Howells /* We now have a contiguous set of dirty pages, each with writeback 4944343d008SDavid Howells * set; the first page is still locked at this point, but all the rest 4954343d008SDavid Howells * have been unlocked. 4964343d008SDavid Howells */ 4974343d008SDavid Howells unlock_page(primary_page); 4984343d008SDavid Howells 49931143d5dSDavid Howells first = primary_page->index; 50031143d5dSDavid Howells last = first + count - 1; 50131143d5dSDavid Howells 50231143d5dSDavid Howells _debug("write back %lx[%u..] to %lx[..%u]", first, offset, last, to); 50331143d5dSDavid Howells 5044343d008SDavid Howells ret = afs_store_data(mapping, first, last, offset, to); 50531143d5dSDavid Howells switch (ret) { 5064343d008SDavid Howells case 0: 5074343d008SDavid Howells ret = count; 5084343d008SDavid Howells break; 5094343d008SDavid Howells 5104343d008SDavid Howells default: 5114343d008SDavid Howells pr_notice("kAFS: Unexpected error from FS.StoreData %d\n", ret); 5124343d008SDavid Howells /* Fall through */ 5134343d008SDavid Howells case -EACCES: 5144343d008SDavid Howells case -EPERM: 5154343d008SDavid Howells case -ENOKEY: 5164343d008SDavid Howells case -EKEYEXPIRED: 5174343d008SDavid Howells case -EKEYREJECTED: 5184343d008SDavid Howells case -EKEYREVOKED: 5194343d008SDavid Howells afs_redirty_pages(wbc, mapping, first, last); 5204343d008SDavid Howells mapping_set_error(mapping, ret); 5214343d008SDavid Howells break; 5224343d008SDavid Howells 52331143d5dSDavid Howells case -EDQUOT: 52431143d5dSDavid Howells case -ENOSPC: 5254343d008SDavid Howells afs_redirty_pages(wbc, mapping, first, last); 5264343d008SDavid Howells mapping_set_error(mapping, -ENOSPC); 52731143d5dSDavid Howells break; 5284343d008SDavid Howells 52931143d5dSDavid Howells case -EROFS: 53031143d5dSDavid Howells case -EIO: 53131143d5dSDavid Howells case -EREMOTEIO: 53231143d5dSDavid Howells case -EFBIG: 53331143d5dSDavid Howells case -ENOENT: 53431143d5dSDavid Howells case -ENOMEDIUM: 53531143d5dSDavid Howells case -ENXIO: 536f51375cdSDavid Howells trace_afs_file_error(vnode, ret, afs_file_error_writeback_fail); 5374343d008SDavid Howells afs_kill_pages(mapping, first, last); 5384343d008SDavid Howells mapping_set_error(mapping, ret); 53931143d5dSDavid Howells break; 54031143d5dSDavid Howells } 54131143d5dSDavid Howells 54231143d5dSDavid Howells _leave(" = %d", ret); 54331143d5dSDavid Howells return ret; 54431143d5dSDavid Howells } 54531143d5dSDavid Howells 54631143d5dSDavid Howells /* 54731143d5dSDavid Howells * write a page back to the server 54831143d5dSDavid Howells * - the caller locked the page for us 54931143d5dSDavid Howells */ 55031143d5dSDavid Howells int afs_writepage(struct page *page, struct writeback_control *wbc) 55131143d5dSDavid Howells { 55231143d5dSDavid Howells int ret; 55331143d5dSDavid Howells 55431143d5dSDavid Howells _enter("{%lx},", page->index); 55531143d5dSDavid Howells 5564343d008SDavid Howells ret = afs_write_back_from_locked_page(page->mapping, wbc, page, 5574343d008SDavid Howells wbc->range_end >> PAGE_SHIFT); 55831143d5dSDavid Howells if (ret < 0) { 55931143d5dSDavid Howells _leave(" = %d", ret); 56031143d5dSDavid Howells return 0; 56131143d5dSDavid Howells } 56231143d5dSDavid Howells 56331143d5dSDavid Howells wbc->nr_to_write -= ret; 56431143d5dSDavid Howells 56531143d5dSDavid Howells _leave(" = 0"); 56631143d5dSDavid Howells return 0; 56731143d5dSDavid Howells } 56831143d5dSDavid Howells 56931143d5dSDavid Howells /* 57031143d5dSDavid Howells * write a region of pages back to the server 57131143d5dSDavid Howells */ 572c1206a2cSAdrian Bunk static int afs_writepages_region(struct address_space *mapping, 57331143d5dSDavid Howells struct writeback_control *wbc, 57431143d5dSDavid Howells pgoff_t index, pgoff_t end, pgoff_t *_next) 57531143d5dSDavid Howells { 57631143d5dSDavid Howells struct page *page; 57731143d5dSDavid Howells int ret, n; 57831143d5dSDavid Howells 57931143d5dSDavid Howells _enter(",,%lx,%lx,", index, end); 58031143d5dSDavid Howells 58131143d5dSDavid Howells do { 582aef6e415SJan Kara n = find_get_pages_range_tag(mapping, &index, end, 583aef6e415SJan Kara PAGECACHE_TAG_DIRTY, 1, &page); 58431143d5dSDavid Howells if (!n) 58531143d5dSDavid Howells break; 58631143d5dSDavid Howells 58731143d5dSDavid Howells _debug("wback %lx", page->index); 58831143d5dSDavid Howells 589b93b0163SMatthew Wilcox /* 590b93b0163SMatthew Wilcox * at this point we hold neither the i_pages lock nor the 591b93b0163SMatthew Wilcox * page lock: the page may be truncated or invalidated 592b93b0163SMatthew Wilcox * (changing page->mapping to NULL), or even swizzled 593b93b0163SMatthew Wilcox * back from swapper_space to tmpfs file mapping 59431143d5dSDavid Howells */ 5954343d008SDavid Howells ret = lock_page_killable(page); 5964343d008SDavid Howells if (ret < 0) { 5974343d008SDavid Howells put_page(page); 5984343d008SDavid Howells _leave(" = %d", ret); 5994343d008SDavid Howells return ret; 6004343d008SDavid Howells } 60131143d5dSDavid Howells 602c5051c7bSDavid Howells if (page->mapping != mapping || !PageDirty(page)) { 60331143d5dSDavid Howells unlock_page(page); 60409cbfeafSKirill A. Shutemov put_page(page); 60531143d5dSDavid Howells continue; 60631143d5dSDavid Howells } 60731143d5dSDavid Howells 608c5051c7bSDavid Howells if (PageWriteback(page)) { 609c5051c7bSDavid Howells unlock_page(page); 61031143d5dSDavid Howells if (wbc->sync_mode != WB_SYNC_NONE) 61131143d5dSDavid Howells wait_on_page_writeback(page); 61229c8bbbdSDavid Howells put_page(page); 61331143d5dSDavid Howells continue; 61431143d5dSDavid Howells } 61531143d5dSDavid Howells 61665a15109SDavid Howells if (!clear_page_dirty_for_io(page)) 61765a15109SDavid Howells BUG(); 6184343d008SDavid Howells ret = afs_write_back_from_locked_page(mapping, wbc, page, end); 61909cbfeafSKirill A. Shutemov put_page(page); 62031143d5dSDavid Howells if (ret < 0) { 62131143d5dSDavid Howells _leave(" = %d", ret); 62231143d5dSDavid Howells return ret; 62331143d5dSDavid Howells } 62431143d5dSDavid Howells 62531143d5dSDavid Howells wbc->nr_to_write -= ret; 62631143d5dSDavid Howells 62731143d5dSDavid Howells cond_resched(); 62831143d5dSDavid Howells } while (index < end && wbc->nr_to_write > 0); 62931143d5dSDavid Howells 63031143d5dSDavid Howells *_next = index; 63131143d5dSDavid Howells _leave(" = 0 [%lx]", *_next); 63231143d5dSDavid Howells return 0; 63331143d5dSDavid Howells } 63431143d5dSDavid Howells 63531143d5dSDavid Howells /* 63631143d5dSDavid Howells * write some of the pending data back to the server 63731143d5dSDavid Howells */ 63831143d5dSDavid Howells int afs_writepages(struct address_space *mapping, 63931143d5dSDavid Howells struct writeback_control *wbc) 64031143d5dSDavid Howells { 64131143d5dSDavid Howells pgoff_t start, end, next; 64231143d5dSDavid Howells int ret; 64331143d5dSDavid Howells 64431143d5dSDavid Howells _enter(""); 64531143d5dSDavid Howells 64631143d5dSDavid Howells if (wbc->range_cyclic) { 64731143d5dSDavid Howells start = mapping->writeback_index; 64831143d5dSDavid Howells end = -1; 64931143d5dSDavid Howells ret = afs_writepages_region(mapping, wbc, start, end, &next); 6501b430beeSWu Fengguang if (start > 0 && wbc->nr_to_write > 0 && ret == 0) 65131143d5dSDavid Howells ret = afs_writepages_region(mapping, wbc, 0, start, 65231143d5dSDavid Howells &next); 65331143d5dSDavid Howells mapping->writeback_index = next; 65431143d5dSDavid Howells } else if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) { 65509cbfeafSKirill A. Shutemov end = (pgoff_t)(LLONG_MAX >> PAGE_SHIFT); 65631143d5dSDavid Howells ret = afs_writepages_region(mapping, wbc, 0, end, &next); 65731143d5dSDavid Howells if (wbc->nr_to_write > 0) 65831143d5dSDavid Howells mapping->writeback_index = next; 65931143d5dSDavid Howells } else { 66009cbfeafSKirill A. Shutemov start = wbc->range_start >> PAGE_SHIFT; 66109cbfeafSKirill A. Shutemov end = wbc->range_end >> PAGE_SHIFT; 66231143d5dSDavid Howells ret = afs_writepages_region(mapping, wbc, start, end, &next); 66331143d5dSDavid Howells } 66431143d5dSDavid Howells 66531143d5dSDavid Howells _leave(" = %d", ret); 66631143d5dSDavid Howells return ret; 66731143d5dSDavid Howells } 66831143d5dSDavid Howells 66931143d5dSDavid Howells /* 67031143d5dSDavid Howells * completion of write to server 67131143d5dSDavid Howells */ 67231143d5dSDavid Howells void afs_pages_written_back(struct afs_vnode *vnode, struct afs_call *call) 67331143d5dSDavid Howells { 67431143d5dSDavid Howells struct pagevec pv; 67513524ab3SDavid Howells unsigned long priv; 67631143d5dSDavid Howells unsigned count, loop; 67731143d5dSDavid Howells pgoff_t first = call->first, last = call->last; 67831143d5dSDavid Howells 67931143d5dSDavid Howells _enter("{%x:%u},{%lx-%lx}", 68031143d5dSDavid Howells vnode->fid.vid, vnode->fid.vnode, first, last); 68131143d5dSDavid Howells 68286679820SMel Gorman pagevec_init(&pv); 68331143d5dSDavid Howells 68431143d5dSDavid Howells do { 6855bbf5d39SDavid Howells _debug("done %lx-%lx", first, last); 68631143d5dSDavid Howells 68731143d5dSDavid Howells count = last - first + 1; 68831143d5dSDavid Howells if (count > PAGEVEC_SIZE) 68931143d5dSDavid Howells count = PAGEVEC_SIZE; 6904343d008SDavid Howells pv.nr = find_get_pages_contig(vnode->vfs_inode.i_mapping, 6914343d008SDavid Howells first, count, pv.pages); 69231143d5dSDavid Howells ASSERTCMP(pv.nr, ==, count); 69331143d5dSDavid Howells 69431143d5dSDavid Howells for (loop = 0; loop < count; loop++) { 69513524ab3SDavid Howells priv = page_private(pv.pages[loop]); 69613524ab3SDavid Howells trace_afs_page_dirty(vnode, tracepoint_string("clear"), 69713524ab3SDavid Howells pv.pages[loop]->index, priv); 6984343d008SDavid Howells set_page_private(pv.pages[loop], 0); 6994343d008SDavid Howells end_page_writeback(pv.pages[loop]); 70031143d5dSDavid Howells } 70131143d5dSDavid Howells first += count; 70231143d5dSDavid Howells __pagevec_release(&pv); 7035bbf5d39SDavid Howells } while (first <= last); 70431143d5dSDavid Howells 7054343d008SDavid Howells afs_prune_wb_keys(vnode); 70631143d5dSDavid Howells _leave(""); 70731143d5dSDavid Howells } 70831143d5dSDavid Howells 70931143d5dSDavid Howells /* 71031143d5dSDavid Howells * write to an AFS file 71131143d5dSDavid Howells */ 71250b5551dSAl Viro ssize_t afs_file_write(struct kiocb *iocb, struct iov_iter *from) 71331143d5dSDavid Howells { 714496ad9aaSAl Viro struct afs_vnode *vnode = AFS_FS_I(file_inode(iocb->ki_filp)); 71531143d5dSDavid Howells ssize_t result; 71650b5551dSAl Viro size_t count = iov_iter_count(from); 71731143d5dSDavid Howells 71850b5551dSAl Viro _enter("{%x.%u},{%zu},", 71950b5551dSAl Viro vnode->fid.vid, vnode->fid.vnode, count); 72031143d5dSDavid Howells 72131143d5dSDavid Howells if (IS_SWAPFILE(&vnode->vfs_inode)) { 72231143d5dSDavid Howells printk(KERN_INFO 72331143d5dSDavid Howells "AFS: Attempt to write to active swap file!\n"); 72431143d5dSDavid Howells return -EBUSY; 72531143d5dSDavid Howells } 72631143d5dSDavid Howells 72731143d5dSDavid Howells if (!count) 72831143d5dSDavid Howells return 0; 72931143d5dSDavid Howells 73050b5551dSAl Viro result = generic_file_write_iter(iocb, from); 73131143d5dSDavid Howells 73231143d5dSDavid Howells _leave(" = %zd", result); 73331143d5dSDavid Howells return result; 73431143d5dSDavid Howells } 73531143d5dSDavid Howells 73631143d5dSDavid Howells /* 73731143d5dSDavid Howells * flush any dirty pages for this process, and check for write errors. 73831143d5dSDavid Howells * - the return status from this call provides a reliable indication of 73931143d5dSDavid Howells * whether any write errors occurred for this process. 74031143d5dSDavid Howells */ 74102c24a82SJosef Bacik int afs_fsync(struct file *file, loff_t start, loff_t end, int datasync) 74231143d5dSDavid Howells { 7433c981bfcSAl Viro struct inode *inode = file_inode(file); 7443c981bfcSAl Viro struct afs_vnode *vnode = AFS_FS_I(inode); 74531143d5dSDavid Howells 7463c981bfcSAl Viro _enter("{%x:%u},{n=%pD},%d", 7473c981bfcSAl Viro vnode->fid.vid, vnode->fid.vnode, file, 74831143d5dSDavid Howells datasync); 74931143d5dSDavid Howells 7504343d008SDavid Howells return file_write_and_wait_range(file, start, end); 75131143d5dSDavid Howells } 7529b3f26c9SDavid Howells 7539b3f26c9SDavid Howells /* 7549b3f26c9SDavid Howells * notification that a previously read-only page is about to become writable 7559b3f26c9SDavid Howells * - if it returns an error, the caller will deliver a bus error signal 7569b3f26c9SDavid Howells */ 7570722f186SSouptick Joarder vm_fault_t afs_page_mkwrite(struct vm_fault *vmf) 7589b3f26c9SDavid Howells { 7591cf7a151SDavid Howells struct file *file = vmf->vma->vm_file; 7601cf7a151SDavid Howells struct inode *inode = file_inode(file); 7611cf7a151SDavid Howells struct afs_vnode *vnode = AFS_FS_I(inode); 7621cf7a151SDavid Howells unsigned long priv; 7639b3f26c9SDavid Howells 7649b3f26c9SDavid Howells _enter("{{%x:%u}},{%lx}", 7651cf7a151SDavid Howells vnode->fid.vid, vnode->fid.vnode, vmf->page->index); 7669b3f26c9SDavid Howells 7671cf7a151SDavid Howells sb_start_pagefault(inode->i_sb); 7681cf7a151SDavid Howells 7691cf7a151SDavid Howells /* Wait for the page to be written to the cache before we allow it to 7701cf7a151SDavid Howells * be modified. We then assume the entire page will need writing back. 7711cf7a151SDavid Howells */ 7729b3f26c9SDavid Howells #ifdef CONFIG_AFS_FSCACHE 7731cf7a151SDavid Howells fscache_wait_on_page_write(vnode->cache, vmf->page); 7749b3f26c9SDavid Howells #endif 7759b3f26c9SDavid Howells 7761cf7a151SDavid Howells if (PageWriteback(vmf->page) && 7771cf7a151SDavid Howells wait_on_page_bit_killable(vmf->page, PG_writeback) < 0) 7781cf7a151SDavid Howells return VM_FAULT_RETRY; 7791cf7a151SDavid Howells 7801cf7a151SDavid Howells if (lock_page_killable(vmf->page) < 0) 7811cf7a151SDavid Howells return VM_FAULT_RETRY; 7821cf7a151SDavid Howells 7831cf7a151SDavid Howells /* We mustn't change page->private until writeback is complete as that 7841cf7a151SDavid Howells * details the portion of the page we need to write back and we might 7851cf7a151SDavid Howells * need to redirty the page if there's a problem. 7861cf7a151SDavid Howells */ 7871cf7a151SDavid Howells wait_on_page_writeback(vmf->page); 7881cf7a151SDavid Howells 7891cf7a151SDavid Howells priv = (unsigned long)PAGE_SIZE << AFS_PRIV_SHIFT; /* To */ 7901cf7a151SDavid Howells priv |= 0; /* From */ 79113524ab3SDavid Howells trace_afs_page_dirty(vnode, tracepoint_string("mkwrite"), 79213524ab3SDavid Howells vmf->page->index, priv); 7931cf7a151SDavid Howells SetPagePrivate(vmf->page); 7941cf7a151SDavid Howells set_page_private(vmf->page, priv); 7951cf7a151SDavid Howells 7961cf7a151SDavid Howells sb_end_pagefault(inode->i_sb); 7971cf7a151SDavid Howells return VM_FAULT_LOCKED; 7989b3f26c9SDavid Howells } 7994343d008SDavid Howells 8004343d008SDavid Howells /* 8014343d008SDavid Howells * Prune the keys cached for writeback. The caller must hold vnode->wb_lock. 8024343d008SDavid Howells */ 8034343d008SDavid Howells void afs_prune_wb_keys(struct afs_vnode *vnode) 8044343d008SDavid Howells { 8054343d008SDavid Howells LIST_HEAD(graveyard); 8064343d008SDavid Howells struct afs_wb_key *wbk, *tmp; 8074343d008SDavid Howells 8084343d008SDavid Howells /* Discard unused keys */ 8094343d008SDavid Howells spin_lock(&vnode->wb_lock); 8104343d008SDavid Howells 8114343d008SDavid Howells if (!mapping_tagged(&vnode->vfs_inode.i_data, PAGECACHE_TAG_WRITEBACK) && 8124343d008SDavid Howells !mapping_tagged(&vnode->vfs_inode.i_data, PAGECACHE_TAG_DIRTY)) { 8134343d008SDavid Howells list_for_each_entry_safe(wbk, tmp, &vnode->wb_keys, vnode_link) { 8144343d008SDavid Howells if (refcount_read(&wbk->usage) == 1) 8154343d008SDavid Howells list_move(&wbk->vnode_link, &graveyard); 8164343d008SDavid Howells } 8174343d008SDavid Howells } 8184343d008SDavid Howells 8194343d008SDavid Howells spin_unlock(&vnode->wb_lock); 8204343d008SDavid Howells 8214343d008SDavid Howells while (!list_empty(&graveyard)) { 8224343d008SDavid Howells wbk = list_entry(graveyard.next, struct afs_wb_key, vnode_link); 8234343d008SDavid Howells list_del(&wbk->vnode_link); 8244343d008SDavid Howells afs_put_wb_key(wbk); 8254343d008SDavid Howells } 8264343d008SDavid Howells } 8274343d008SDavid Howells 8284343d008SDavid Howells /* 8294343d008SDavid Howells * Clean up a page during invalidation. 8304343d008SDavid Howells */ 8314343d008SDavid Howells int afs_launder_page(struct page *page) 8324343d008SDavid Howells { 8334343d008SDavid Howells struct address_space *mapping = page->mapping; 8344343d008SDavid Howells struct afs_vnode *vnode = AFS_FS_I(mapping->host); 8354343d008SDavid Howells unsigned long priv; 8364343d008SDavid Howells unsigned int f, t; 8374343d008SDavid Howells int ret = 0; 8384343d008SDavid Howells 8394343d008SDavid Howells _enter("{%lx}", page->index); 8404343d008SDavid Howells 8414343d008SDavid Howells priv = page_private(page); 8424343d008SDavid Howells if (clear_page_dirty_for_io(page)) { 8434343d008SDavid Howells f = 0; 8444343d008SDavid Howells t = PAGE_SIZE; 8454343d008SDavid Howells if (PagePrivate(page)) { 8464343d008SDavid Howells f = priv & AFS_PRIV_MAX; 8474343d008SDavid Howells t = priv >> AFS_PRIV_SHIFT; 8484343d008SDavid Howells } 8494343d008SDavid Howells 85013524ab3SDavid Howells trace_afs_page_dirty(vnode, tracepoint_string("launder"), 85113524ab3SDavid Howells page->index, priv); 8524343d008SDavid Howells ret = afs_store_data(mapping, page->index, page->index, t, f); 8534343d008SDavid Howells } 8544343d008SDavid Howells 85513524ab3SDavid Howells trace_afs_page_dirty(vnode, tracepoint_string("laundered"), 85613524ab3SDavid Howells page->index, priv); 8574343d008SDavid Howells set_page_private(page, 0); 8584343d008SDavid Howells ClearPagePrivate(page); 8594343d008SDavid Howells 8604343d008SDavid Howells #ifdef CONFIG_AFS_FSCACHE 8614343d008SDavid Howells if (PageFsCache(page)) { 8624343d008SDavid Howells fscache_wait_on_page_write(vnode->cache, page); 8634343d008SDavid Howells fscache_uncache_page(vnode->cache, page); 8644343d008SDavid Howells } 8654343d008SDavid Howells #endif 8664343d008SDavid Howells return ret; 86731143d5dSDavid Howells } 868