From: Linus Torvalds Date: Mon, 25 Oct 2010 17:08:21 +0000 (-0700) Subject: Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd X-Git-Tag: v2.6.37-rc1~123 X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=57c155d51e2f3d7411eeac5e7fd7634d2d1f6b4f;hp=9afd281a152702143961c09b5482a66eeefe5e03 Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd * 'for-linus' of git://git.open-osd.org/linux-open-osd: exofs: Remove inode->i_count manipulation in exofs_new_inode fs/exofs: typo fix of faild to failed exofs: Set i_mapping->backing_dev_info anyway exofs: Cleaup read path in regard with read_for_write --- diff --git a/fs/exofs/dir.c b/fs/exofs/dir.c index d91e9d829bc1..dcc941d82d67 100644 --- a/fs/exofs/dir.c +++ b/fs/exofs/dir.c @@ -420,7 +420,7 @@ int exofs_set_link(struct inode *dir, struct exofs_dir_entry *de, err = exofs_write_begin(NULL, page->mapping, pos, len, AOP_FLAG_UNINTERRUPTIBLE, &page, NULL); if (err) - EXOFS_ERR("exofs_set_link: exofs_write_begin FAILD => %d\n", + EXOFS_ERR("exofs_set_link: exofs_write_begin FAILED => %d\n", err); de->inode_no = cpu_to_le64(inode->i_ino); @@ -556,7 +556,7 @@ int exofs_delete_entry(struct exofs_dir_entry *dir, struct page *page) err = exofs_write_begin(NULL, page->mapping, pos, to - from, 0, &page, NULL); if (err) - EXOFS_ERR("exofs_delete_entry: exofs_write_begin FAILD => %d\n", + EXOFS_ERR("exofs_delete_entry: exofs_write_begin FAILED => %d\n", err); if (pde) pde->rec_len = cpu_to_le16(to - from); diff --git a/fs/exofs/inode.c b/fs/exofs/inode.c index 44602754f758..42685424817b 100644 --- a/fs/exofs/inode.c +++ b/fs/exofs/inode.c @@ -185,7 +185,7 @@ static void update_write_page(struct page *page, int ret) /* Called at the end of reads, to optionally unlock pages and update their * status. */ -static int __readpages_done(struct page_collect *pcol, bool do_unlock) +static int __readpages_done(struct page_collect *pcol) { int i; u64 resid; @@ -221,7 +221,7 @@ static int __readpages_done(struct page_collect *pcol, bool do_unlock) page_stat ? "bad_bytes" : "good_bytes"); ret = update_read_page(page, page_stat); - if (do_unlock) + if (!pcol->read_4_write) unlock_page(page); length += PAGE_SIZE; } @@ -236,7 +236,7 @@ static void readpages_done(struct exofs_io_state *ios, void *p) { struct page_collect *pcol = p; - __readpages_done(pcol, true); + __readpages_done(pcol); atomic_dec(&pcol->sbi->s_curr_pending); kfree(pcol); } @@ -257,7 +257,7 @@ static void _unlock_pcol_pages(struct page_collect *pcol, int ret, int rw) } } -static int read_exec(struct page_collect *pcol, bool is_sync) +static int read_exec(struct page_collect *pcol) { struct exofs_i_info *oi = exofs_i(pcol->inode); struct exofs_io_state *ios = pcol->ios; @@ -267,17 +267,14 @@ static int read_exec(struct page_collect *pcol, bool is_sync) if (!pcol->pages) return 0; - /* see comment in _readpage() about sync reads */ - WARN_ON(is_sync && (pcol->nr_pages != 1)); - ios->pages = pcol->pages; ios->nr_pages = pcol->nr_pages; ios->length = pcol->length; ios->offset = pcol->pg_first << PAGE_CACHE_SHIFT; - if (is_sync) { + if (pcol->read_4_write) { exofs_oi_read(oi, pcol->ios); - return __readpages_done(pcol, false); + return __readpages_done(pcol); } pcol_copy = kmalloc(sizeof(*pcol_copy), GFP_KERNEL); @@ -303,7 +300,7 @@ static int read_exec(struct page_collect *pcol, bool is_sync) return 0; err: - if (!is_sync) + if (!pcol->read_4_write) _unlock_pcol_pages(pcol, ret, READ); pcol_free(pcol); @@ -356,7 +353,7 @@ static int readpage_strip(void *data, struct page *page) EXOFS_DBGMSG("readpage_strip(0x%lx, 0x%lx) empty page," " splitting\n", inode->i_ino, page->index); - return read_exec(pcol, false); + return read_exec(pcol); } try_again: @@ -366,7 +363,7 @@ try_again: } else if (unlikely((pcol->pg_first + pcol->nr_pages) != page->index)) { /* Discontinuity detected, split the request */ - ret = read_exec(pcol, false); + ret = read_exec(pcol); if (unlikely(ret)) goto fail; goto try_again; @@ -391,7 +388,7 @@ try_again: page, len, pcol->nr_pages, pcol->length); /* split the request, and start again with current page */ - ret = read_exec(pcol, false); + ret = read_exec(pcol); if (unlikely(ret)) goto fail; @@ -420,27 +417,24 @@ static int exofs_readpages(struct file *file, struct address_space *mapping, return ret; } - return read_exec(&pcol, false); + return read_exec(&pcol); } -static int _readpage(struct page *page, bool is_sync) +static int _readpage(struct page *page, bool read_4_write) { struct page_collect pcol; int ret; _pcol_init(&pcol, 1, page->mapping->host); - /* readpage_strip might call read_exec(,is_sync==false) at several - * places but not if we have a single page. - */ - pcol.read_4_write = is_sync; + pcol.read_4_write = read_4_write; ret = readpage_strip(&pcol, page); if (ret) { EXOFS_ERR("_readpage => %d\n", ret); return ret; } - return read_exec(&pcol, is_sync); + return read_exec(&pcol); } /* @@ -1036,6 +1030,7 @@ struct inode *exofs_iget(struct super_block *sb, unsigned long ino) memcpy(oi->i_data, fcb.i_data, sizeof(fcb.i_data)); } + inode->i_mapping->backing_dev_info = sb->s_bdi; if (S_ISREG(inode->i_mode)) { inode->i_op = &exofs_file_inode_operations; inode->i_fop = &exofs_file_operations; @@ -1072,8 +1067,10 @@ bad_inode: int __exofs_wait_obj_created(struct exofs_i_info *oi) { if (!obj_created(oi)) { + EXOFS_DBGMSG("!obj_created\n"); BUG_ON(!obj_2bcreated(oi)); wait_event(oi->i_wq, obj_created(oi)); + EXOFS_DBGMSG("wait_event done\n"); } return unlikely(is_bad_inode(&oi->vfs_inode)) ? -EIO : 0; } @@ -1107,7 +1104,6 @@ static void create_done(struct exofs_io_state *ios, void *p) set_obj_created(oi); - atomic_dec(&inode->i_count); wake_up(&oi->i_wq); } @@ -1135,6 +1131,7 @@ struct inode *exofs_new_inode(struct inode *dir, int mode) sbi = sb->s_fs_info; + inode->i_mapping->backing_dev_info = sb->s_bdi; sb->s_dirt = 1; inode_init_owner(inode, dir, mode); inode->i_ino = sbi->s_nextid++; @@ -1157,17 +1154,11 @@ struct inode *exofs_new_inode(struct inode *dir, int mode) ios->obj.id = exofs_oi_objno(oi); exofs_make_credential(oi->i_cred, &ios->obj); - /* increment the refcount so that the inode will still be around when we - * reach the callback - */ - atomic_inc(&inode->i_count); - ios->done = create_done; ios->private = inode; ios->cred = oi->i_cred; ret = exofs_sbi_create(ios); if (ret) { - atomic_dec(&inode->i_count); exofs_put_io_state(ios); return ERR_PTR(ret); } @@ -1257,12 +1248,7 @@ static int exofs_update_inode(struct inode *inode, int do_sync) ios->out_attr_len = 1; ios->out_attr = &attr; - if (!obj_created(oi)) { - EXOFS_DBGMSG("!obj_created\n"); - BUG_ON(!obj_2bcreated(oi)); - wait_event(oi->i_wq, obj_created(oi)); - EXOFS_DBGMSG("wait_event done\n"); - } + wait_obj_created(oi); if (!do_sync) { args->sbi = sbi; @@ -1325,12 +1311,12 @@ void exofs_evict_inode(struct inode *inode) inode->i_size = 0; end_writeback(inode); - /* if we are deleting an obj that hasn't been created yet, wait */ - if (!obj_created(oi)) { - BUG_ON(!obj_2bcreated(oi)); - wait_event(oi->i_wq, obj_created(oi)); - /* ignore the error attempt a remove anyway */ - } + /* if we are deleting an obj that hasn't been created yet, wait. + * This also makes sure that create_done cannot be called with an + * already evicted inode. + */ + wait_obj_created(oi); + /* ignore the error, attempt a remove anyway */ /* Now Remove the OSD objects */ ret = exofs_get_io_state(&sbi->layout, &ios);