diff options
Diffstat (limited to 'fs/9p/vfs_addr.c')
| -rw-r--r-- | fs/9p/vfs_addr.c | 46 |
1 files changed, 45 insertions, 1 deletions
diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c index 4f5ce4aca317..f3f349f460e5 100644 --- a/fs/9p/vfs_addr.c +++ b/fs/9p/vfs_addr.c @@ -137,6 +137,7 @@ static void v9fs_vfs_readahead(struct readahead_control *ractl) static int v9fs_release_page(struct page *page, gfp_t gfp) { struct folio *folio = page_folio(page); + struct inode *inode = folio_inode(folio); if (folio_test_private(folio)) return 0; @@ -147,6 +148,7 @@ static int v9fs_release_page(struct page *page, gfp_t gfp) folio_wait_fscache(folio); } #endif + fscache_note_page_release(v9fs_inode_cookie(V9FS_I(inode))); return 1; } @@ -165,10 +167,25 @@ static void v9fs_invalidate_page(struct page *page, unsigned int offset, folio_wait_fscache(folio); } +static void v9fs_write_to_cache_done(void *priv, ssize_t transferred_or_error, + bool was_async) +{ + struct v9fs_inode *v9inode = priv; + __le32 version; + + if (IS_ERR_VALUE(transferred_or_error) && + transferred_or_error != -ENOBUFS) { + version = cpu_to_le32(v9inode->qid.version); + fscache_invalidate(v9fs_inode_cookie(v9inode), &version, + i_size_read(&v9inode->vfs_inode), 0); + } +} + static int v9fs_vfs_write_folio_locked(struct folio *folio) { struct inode *inode = folio_inode(folio); struct v9fs_inode *v9inode = V9FS_I(inode); + struct fscache_cookie *cookie = v9fs_inode_cookie(v9inode); loff_t start = folio_pos(folio); loff_t i_size = i_size_read(inode); struct iov_iter from; @@ -185,10 +202,21 @@ static int v9fs_vfs_write_folio_locked(struct folio *folio) /* We should have writeback_fid always set */ BUG_ON(!v9inode->writeback_fid); + folio_wait_fscache(folio); folio_start_writeback(folio); p9_client_write(v9inode->writeback_fid, start, &from, &err); + if (err == 0 && + fscache_cookie_enabled(cookie) && + test_bit(FSCACHE_COOKIE_IS_CACHING, &cookie->flags)) { + folio_start_fscache(folio); + fscache_write_to_cache(v9fs_inode_cookie(v9inode), + folio_mapping(folio), start, len, i_size, + v9fs_write_to_cache_done, v9inode, + true); + } + folio_end_writeback(folio); return err; } @@ -307,6 +335,7 @@ static int v9fs_write_end(struct file *filp, struct address_space *mapping, loff_t last_pos = pos + copied; struct folio *folio = page_folio(subpage); struct inode *inode = mapping->host; + struct v9fs_inode *v9inode = V9FS_I(inode); p9_debug(P9_DEBUG_VFS, "filp %p, mapping %p\n", filp, mapping); @@ -326,6 +355,7 @@ static int v9fs_write_end(struct file *filp, struct address_space *mapping, if (last_pos > inode->i_size) { inode_add_bytes(inode, last_pos - inode->i_size); i_size_write(inode, last_pos); + fscache_update_cookie(v9fs_inode_cookie(v9inode), NULL, &last_pos); } folio_mark_dirty(folio); out: @@ -335,11 +365,25 @@ out: 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 int v9fs_set_page_dirty(struct page *page) +{ + struct v9fs_inode *v9inode = V9FS_I(page->mapping->host); + + return fscache_set_page_dirty(page, v9fs_inode_cookie(v9inode)); +} +#else +#define v9fs_set_page_dirty __set_page_dirty_nobuffers +#endif const struct address_space_operations v9fs_addr_operations = { .readpage = v9fs_vfs_readpage, .readahead = v9fs_vfs_readahead, - .set_page_dirty = __set_page_dirty_nobuffers, + .set_page_dirty = v9fs_set_page_dirty, .writepage = v9fs_vfs_writepage, .write_begin = v9fs_write_begin, .write_end = v9fs_write_end, |