From 083db6fd3e73fc4f9ee74d2da1012a94216d6a60 Mon Sep 17 00:00:00 2001 From: David Howells Date: Wed, 15 Dec 2021 23:48:33 +0000 Subject: [PATCH] ceph: uninline the data on a file opened for writing If a ceph file is made up of inline data, uninline that in the ceph_open() rather than in ceph_page_mkwrite(), ceph_write_iter(), ceph_fallocate() or ceph_write_begin(). This makes it easier to convert to using the netfs library for VM write hooks. Should this also take the inode lock for the duration on uninlining to prevent a race with truncation? [ jlayton: fix up folio locking, update i_inline_version after write ] Signed-off-by: David Howells Signed-off-by: Jeff Layton Signed-off-by: Ilya Dryomov --- fs/ceph/addr.c | 154 +++++++++++++++++--------------------------------------- fs/ceph/file.c | 32 ++++++------ fs/ceph/super.h | 2 +- 3 files changed, 64 insertions(+), 124 deletions(-) diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index a58b851..46e0881 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -1317,45 +1317,11 @@ static int ceph_write_begin(struct file *file, struct address_space *mapping, struct page **pagep, void **fsdata) { struct inode *inode = file_inode(file); - struct ceph_inode_info *ci = ceph_inode(inode); struct folio *folio = NULL; - pgoff_t index = pos >> PAGE_SHIFT; int r; - /* - * Uninlining should have already been done and everything updated, EXCEPT - * for inline_version sent to the MDS. - */ - if (ci->i_inline_version != CEPH_INLINE_NONE) { - unsigned int fgp_flags = FGP_LOCK | FGP_WRITE | FGP_CREAT | FGP_STABLE; - if (aop_flags & AOP_FLAG_NOFS) - fgp_flags |= FGP_NOFS; - folio = __filemap_get_folio(mapping, index, fgp_flags, - mapping_gfp_mask(mapping)); - if (!folio) - return -ENOMEM; - - /* - * The inline_version on a new inode is set to 1. If that's the - * case, then the folio is brand new and isn't yet Uptodate. - */ - r = 0; - if (index == 0 && ci->i_inline_version != 1) { - if (!folio_test_uptodate(folio)) { - WARN_ONCE(1, "ceph: write_begin called on still-inlined inode (inline_version %llu)!\n", - ci->i_inline_version); - r = -EINVAL; - } - goto out; - } - zero_user_segment(&folio->page, 0, folio_size(folio)); - folio_mark_uptodate(folio); - goto out; - } - r = netfs_write_begin(file, inode->i_mapping, pos, len, 0, &folio, NULL, &ceph_netfs_read_ops, NULL); -out: if (r == 0) folio_wait_fscache(folio); if (r < 0) { @@ -1551,19 +1517,6 @@ static vm_fault_t ceph_page_mkwrite(struct vm_fault *vmf) sb_start_pagefault(inode->i_sb); ceph_block_sigs(&oldset); - if (ci->i_inline_version != CEPH_INLINE_NONE) { - struct page *locked_page = NULL; - if (off == 0) { - lock_page(page); - locked_page = page; - } - err = ceph_uninline_data(vma->vm_file, locked_page); - if (locked_page) - unlock_page(locked_page); - if (err < 0) - goto out_free; - } - if (off + thp_size(page) <= size) len = thp_size(page); else @@ -1620,11 +1573,9 @@ static vm_fault_t ceph_page_mkwrite(struct vm_fault *vmf) ceph_put_snap_context(snapc); } while (err == 0); - if (ret == VM_FAULT_LOCKED || - ci->i_inline_version != CEPH_INLINE_NONE) { + if (ret == VM_FAULT_LOCKED) { int dirty; spin_lock(&ci->i_ceph_lock); - ci->i_inline_version = CEPH_INLINE_NONE; dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, &prealloc_cf); spin_unlock(&ci->i_ceph_lock); @@ -1688,16 +1639,29 @@ void ceph_fill_inline_data(struct inode *inode, struct page *locked_page, } } -int ceph_uninline_data(struct file *filp, struct page *locked_page) +int ceph_uninline_data(struct file *file) { - struct inode *inode = file_inode(filp); + struct inode *inode = file_inode(file); struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_fs_client *fsc = ceph_inode_to_client(inode); struct ceph_osd_request *req; - struct page *page = NULL; + struct ceph_cap_flush *prealloc_cf; + struct folio *folio = NULL; + struct page *pages[1]; u64 len, inline_version; int err = 0; - bool from_pagecache = false; + + prealloc_cf = ceph_alloc_cap_flush(); + if (!prealloc_cf) + return -ENOMEM; + + folio = read_mapping_folio(inode->i_mapping, 0, file); + if (IS_ERR(folio)) { + err = PTR_ERR(folio); + goto out; + } + + folio_lock(folio); spin_lock(&ci->i_ceph_lock); inline_version = ci->i_inline_version; @@ -1708,45 +1672,11 @@ int ceph_uninline_data(struct file *filp, struct page *locked_page) if (inline_version == 1 || /* initial version, no data */ inline_version == CEPH_INLINE_NONE) - goto out; - - if (locked_page) { - page = locked_page; - WARN_ON(!PageUptodate(page)); - } else if (ceph_caps_issued(ci) & - (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) { - page = find_get_page(inode->i_mapping, 0); - if (page) { - if (PageUptodate(page)) { - from_pagecache = true; - lock_page(page); - } else { - put_page(page); - page = NULL; - } - } - } + goto out_unlock; - if (page) { - len = i_size_read(inode); - if (len > PAGE_SIZE) - len = PAGE_SIZE; - } else { - page = __page_cache_alloc(GFP_NOFS); - if (!page) { - err = -ENOMEM; - goto out; - } - err = __ceph_do_getattr(inode, page, - CEPH_STAT_CAP_INLINE_DATA, true); - if (err < 0) { - /* no inline data */ - if (err == -ENODATA) - err = 0; - goto out; - } - len = err; - } + len = i_size_read(inode); + if (len > folio_size(folio)) + len = folio_size(folio); req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, ceph_vino(inode), 0, &len, 0, 1, @@ -1754,7 +1684,7 @@ int ceph_uninline_data(struct file *filp, struct page *locked_page) NULL, 0, 0, false); if (IS_ERR(req)) { err = PTR_ERR(req); - goto out; + goto out_unlock; } req->r_mtime = inode->i_mtime; @@ -1763,7 +1693,7 @@ int ceph_uninline_data(struct file *filp, struct page *locked_page) err = ceph_osdc_wait_request(&fsc->client->osdc, req); ceph_osdc_put_request(req); if (err < 0) - goto out; + goto out_unlock; req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, ceph_vino(inode), 0, &len, 1, 3, @@ -1772,10 +1702,11 @@ int ceph_uninline_data(struct file *filp, struct page *locked_page) ci->i_truncate_size, false); if (IS_ERR(req)) { err = PTR_ERR(req); - goto out; + goto out_unlock; } - osd_req_op_extent_osd_data_pages(req, 1, &page, len, 0, false, false); + pages[0] = folio_page(folio, 0); + osd_req_op_extent_osd_data_pages(req, 1, pages, len, 0, false, false); { __le64 xattr_buf = cpu_to_le64(inline_version); @@ -1785,7 +1716,7 @@ int ceph_uninline_data(struct file *filp, struct page *locked_page) CEPH_OSD_CMPXATTR_OP_GT, CEPH_OSD_CMPXATTR_MODE_U64); if (err) - goto out_put; + goto out_put_req; } { @@ -1796,7 +1727,7 @@ int ceph_uninline_data(struct file *filp, struct page *locked_page) "inline_version", xattr_buf, xattr_len, 0, 0); if (err) - goto out_put; + goto out_put_req; } req->r_mtime = inode->i_mtime; @@ -1807,19 +1738,28 @@ int ceph_uninline_data(struct file *filp, struct page *locked_page) ceph_update_write_metrics(&fsc->mdsc->metric, req->r_start_latency, req->r_end_latency, len, err); -out_put: + if (!err) { + int dirty; + + /* Set to CAP_INLINE_NONE and dirty the caps */ + down_read(&fsc->mdsc->snap_rwsem); + spin_lock(&ci->i_ceph_lock); + ci->i_inline_version = CEPH_INLINE_NONE; + dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, &prealloc_cf); + spin_unlock(&ci->i_ceph_lock); + up_read(&fsc->mdsc->snap_rwsem); + if (dirty) + __mark_inode_dirty(inode, dirty); + } +out_put_req: ceph_osdc_put_request(req); if (err == -ECANCELED) err = 0; +out_unlock: + folio_unlock(folio); + folio_put(folio); out: - if (page && page != locked_page) { - if (from_pagecache) { - unlock_page(page); - put_page(page); - } else - __free_pages(page, 0); - } - + ceph_free_cap_flush(prealloc_cf); dout("uninline_data %p %llx.%llx inline_version %llu = %d\n", inode, ceph_vinop(inode), inline_version, err); return err; diff --git a/fs/ceph/file.c b/fs/ceph/file.c index bbed322..22ca724 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -207,6 +207,7 @@ static int ceph_init_file_info(struct inode *inode, struct file *file, struct ceph_mount_options *opt = ceph_inode_to_client(&ci->vfs_inode)->mount_options; struct ceph_file_info *fi; + int ret; dout("%s %p %p 0%o (%s)\n", __func__, inode, file, inode->i_mode, isdir ? "dir" : "regular"); @@ -240,7 +241,22 @@ static int ceph_init_file_info(struct inode *inode, struct file *file, INIT_LIST_HEAD(&fi->rw_contexts); fi->filp_gen = READ_ONCE(ceph_inode_to_client(inode)->filp_gen); + if ((file->f_mode & FMODE_WRITE) && + ci->i_inline_version != CEPH_INLINE_NONE) { + ret = ceph_uninline_data(file); + if (ret < 0) + goto error; + } + return 0; + +error: + ceph_fscache_unuse_cookie(inode, file->f_mode & FMODE_WRITE); + ceph_put_fmode(ci, fi->fmode, 1); + kmem_cache_free(ceph_file_cachep, fi); + /* wake up anyone waiting for caps on this inode */ + wake_up_all(&ci->i_cap_wq); + return ret; } /* @@ -1041,7 +1057,6 @@ static void ceph_aio_complete(struct inode *inode, } spin_lock(&ci->i_ceph_lock); - ci->i_inline_version = CEPH_INLINE_NONE; dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, &aio_req->prealloc_cf); spin_unlock(&ci->i_ceph_lock); @@ -1778,12 +1793,6 @@ retry_snap: if (err) goto out; - if (ci->i_inline_version != CEPH_INLINE_NONE) { - err = ceph_uninline_data(file, NULL); - if (err < 0) - goto out; - } - dout("aio_write %p %llx.%llx %llu~%zd getting caps. i_size %llu\n", inode, ceph_vinop(inode), pos, count, i_size_read(inode)); if (!(fi->flags & CEPH_F_SYNC) && !direct_lock) @@ -1855,7 +1864,6 @@ retry_snap: int dirty; spin_lock(&ci->i_ceph_lock); - ci->i_inline_version = CEPH_INLINE_NONE; dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, &prealloc_cf); spin_unlock(&ci->i_ceph_lock); @@ -2109,12 +2117,6 @@ static long ceph_fallocate(struct file *file, int mode, goto unlock; } - if (ci->i_inline_version != CEPH_INLINE_NONE) { - ret = ceph_uninline_data(file, NULL); - if (ret < 0) - goto unlock; - } - size = i_size_read(inode); /* Are we punching a hole beyond EOF? */ @@ -2139,7 +2141,6 @@ static long ceph_fallocate(struct file *file, int mode, if (!ret) { spin_lock(&ci->i_ceph_lock); - ci->i_inline_version = CEPH_INLINE_NONE; dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, &prealloc_cf); spin_unlock(&ci->i_ceph_lock); @@ -2532,7 +2533,6 @@ static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off, } /* Mark Fw dirty */ spin_lock(&dst_ci->i_ceph_lock); - dst_ci->i_inline_version = CEPH_INLINE_NONE; dirty = __ceph_mark_dirty_caps(dst_ci, CEPH_CAP_FILE_WR, &prealloc_cf); spin_unlock(&dst_ci->i_ceph_lock); if (dirty) diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 67f145e..a35c274 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -1213,7 +1213,7 @@ extern void __ceph_touch_fmode(struct ceph_inode_info *ci, /* addr.c */ extern const struct address_space_operations ceph_aops; extern int ceph_mmap(struct file *file, struct vm_area_struct *vma); -extern int ceph_uninline_data(struct file *filp, struct page *locked_page); +extern int ceph_uninline_data(struct file *file); extern int ceph_pool_perm_check(struct inode *inode, int need); extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc); int ceph_purge_inode_cap(struct inode *inode, struct ceph_cap *cap, bool *invalidate); -- 2.7.4