From 0cfae3d8795f388f9de78adb0171520d19da77e9 Mon Sep 17 00:00:00 2001 From: Ryusuke Konishi Date: Thu, 18 Jun 2009 11:42:53 +0900 Subject: nilfs2: remove unlikely directive causing mis-conversion of error code The following error code handling in nilfs_segctor_write() function wrongly converted negative error codes to a truth value (i.e. 1): err = unlikely(err) ? : res; which originaly meant to be err = err ? : res; This mis-conversion caused that write or sync functions receive the unexpected error code. This fixes the bug by removing the unlikely directive. Signed-off-by: Ryusuke Konishi Cc: stable@kernel.org diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c index aa97754..c182491 100644 --- a/fs/nilfs2/segment.c +++ b/fs/nilfs2/segment.c @@ -1829,8 +1829,8 @@ static int nilfs_segctor_write(struct nilfs_sc_info *sci, err = nilfs_segbuf_write(segbuf, &wi); res = nilfs_segbuf_wait(segbuf, &wi); - err = unlikely(err) ? : res; - if (unlikely(err)) + err = err ? : res; + if (err) return err; } return 0; -- cgit v0.10.2 From 8227b29722fdbac72357aae155d171a5c777670c Mon Sep 17 00:00:00 2001 From: Ryusuke Konishi Date: Thu, 18 Jun 2009 23:52:23 +0900 Subject: nilfs2: fix hang problem of log writer which occurs after write failures Leandro Lucarella gave me a report that nilfs gets stuck after its write function fails. The problem turned out to be caused by bugs which leave writeback flag on pages. This fixes the problem by ensuring to clear the writeback flag in error path. Reported-by: Leandro Lucarella Signed-off-by: Ryusuke Konishi Cc: stable@kernel.org diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c index c182491..8b5e477 100644 --- a/fs/nilfs2/segment.c +++ b/fs/nilfs2/segment.c @@ -1836,19 +1836,6 @@ static int nilfs_segctor_write(struct nilfs_sc_info *sci, return 0; } -static int nilfs_page_has_uncleared_buffer(struct page *page) -{ - struct buffer_head *head, *bh; - - head = bh = page_buffers(page); - do { - if (buffer_dirty(bh) && !list_empty(&bh->b_assoc_buffers)) - return 1; - bh = bh->b_this_page; - } while (bh != head); - return 0; -} - static void __nilfs_end_page_io(struct page *page, int err) { if (!err) { @@ -1872,12 +1859,11 @@ static void nilfs_end_page_io(struct page *page, int err) if (!page) return; - if (buffer_nilfs_node(page_buffers(page)) && - nilfs_page_has_uncleared_buffer(page)) - /* For b-tree node pages, this function may be called twice - or more because they might be split in a segment. - This check assures that cleanup has been done for all - buffers in a split btnode page. */ + if (buffer_nilfs_node(page_buffers(page)) && !PageWriteback(page)) + /* + * For b-tree node pages, this function may be called twice + * or more because they might be split in a segment. + */ return; __nilfs_end_page_io(page, err); @@ -1940,7 +1926,7 @@ static void nilfs_segctor_abort_write(struct nilfs_sc_info *sci, } if (bh->b_page != fs_page) { nilfs_end_page_io(fs_page, err); - if (unlikely(fs_page == failed_page)) + if (fs_page && fs_page == failed_page) goto done; fs_page = bh->b_page; } -- cgit v0.10.2 From 4a52df779700080de4afb0436d9dd9188514a69b Mon Sep 17 00:00:00 2001 From: Ryusuke Konishi Date: Thu, 18 Jun 2009 23:53:25 +0900 Subject: nilfs2: fix incorrect KERN_CRIT messages in case of write failures In case of write-failure retries, the following KERN_CRIT level messages are mistakenly output by nilfs_dat_commit_start() function: nilfs_dat_commit_start: vbn = 408463, start = 12506, end = 18446744073709551615, pbn = 530210 nilfs_dat_commit_start: vbn = 408515, start = 12506, end = 18446744073709551615, pbn = 530211 nilfs_dat_commit_start: vbn = 408464, start = 12506, end = 18446744073709551615, pbn = 530212 ... This suppresses these messages. Signed-off-by: Ryusuke Konishi Cc: stable@kernel.org diff --git a/fs/nilfs2/dat.c b/fs/nilfs2/dat.c index 0b2710e..8927ca2 100644 --- a/fs/nilfs2/dat.c +++ b/fs/nilfs2/dat.c @@ -134,15 +134,6 @@ void nilfs_dat_commit_start(struct inode *dat, struct nilfs_palloc_req *req, entry = nilfs_palloc_block_get_entry(dat, req->pr_entry_nr, req->pr_entry_bh, kaddr); entry->de_start = cpu_to_le64(nilfs_mdt_cno(dat)); - if (entry->de_blocknr != cpu_to_le64(0) || - entry->de_end != cpu_to_le64(NILFS_CNO_MAX)) { - printk(KERN_CRIT - "%s: vbn = %llu, start = %llu, end = %llu, pbn = %llu\n", - __func__, (unsigned long long)req->pr_entry_nr, - (unsigned long long)le64_to_cpu(entry->de_start), - (unsigned long long)le64_to_cpu(entry->de_end), - (unsigned long long)le64_to_cpu(entry->de_blocknr)); - } entry->de_blocknr = cpu_to_le64(blocknr); kunmap_atomic(kaddr, KM_USER0); -- cgit v0.10.2 From ff54de363afa4583e2a6249f25fe21dfaeb11ea2 Mon Sep 17 00:00:00 2001 From: Ryusuke Konishi Date: Fri, 19 Jun 2009 02:53:56 +0900 Subject: nilfs2: fix lockdep warning between regular file and inode file This will fix the following false positive of recursive locking which lockdep has detected: ============================================= [ INFO: possible recursive locking detected ] 2.6.30-nilfs #42 --------------------------------------------- nilfs_cleanerd/10607 is trying to acquire lock: (&bmap->b_sem){++++-.}, at: [] nilfs_bmap_lookup_at_level+0x1a/0x74 [nilfs2] but task is already holding lock: (&bmap->b_sem){++++-.}, at: [] nilfs_bmap_truncate+0x19/0x6a [nilfs2] other info that might help us debug this: 2 locks held by nilfs_cleanerd/10607: #0: (&nilfs->ns_segctor_sem){++++.+}, at: [] nilfs_transaction_begin+0xb6/0x10c [nilfs2] #1: (&bmap->b_sem){++++-.}, at: [] nilfs_bmap_truncate+0x19/0x6a [nilfs2] Signed-off-by: Ryusuke Konishi diff --git a/fs/nilfs2/bmap.c b/fs/nilfs2/bmap.c index 36df60b..99d58a0 100644 --- a/fs/nilfs2/bmap.c +++ b/fs/nilfs2/bmap.c @@ -568,6 +568,7 @@ void nilfs_bmap_abort_update_v(struct nilfs_bmap *bmap, } static struct lock_class_key nilfs_bmap_dat_lock_key; +static struct lock_class_key nilfs_bmap_mdt_lock_key; /** * nilfs_bmap_read - read a bmap from an inode @@ -603,7 +604,11 @@ int nilfs_bmap_read(struct nilfs_bmap *bmap, struct nilfs_inode *raw_inode) bmap->b_ptr_type = NILFS_BMAP_PTR_VS; bmap->b_last_allocated_key = 0; bmap->b_last_allocated_ptr = NILFS_BMAP_INVALID_PTR; + lockdep_set_class(&bmap->b_sem, &nilfs_bmap_mdt_lock_key); break; + case NILFS_IFILE_INO: + lockdep_set_class(&bmap->b_sem, &nilfs_bmap_mdt_lock_key); + /* Fall through */ default: bmap->b_ptr_type = NILFS_BMAP_PTR_VM; bmap->b_last_allocated_key = 0; -- cgit v0.10.2 From d9a0a345ab7a58a30ec38e5bb7401a28714914d2 Mon Sep 17 00:00:00 2001 From: Jiro SEKIBA Date: Sat, 4 Jul 2009 23:00:53 +0900 Subject: nilfs2: fix disorder in cp count on error during deleting checkpoints This fixes a bug that checkpoint count gets wrong on errors when deleting a series of checkpoints. The count error is persistent since the checkpoint count is stored on disk. Some userland programs refer to the count via ioctl, and this bugfix is needed to prevent malfunction of such programs. Signed-off-by: Jiro SEKIBA Signed-off-by: Ryusuke Konishi Cc: stable@kernel.org diff --git a/fs/nilfs2/cpfile.c b/fs/nilfs2/cpfile.c index 7d49813..aec942c 100644 --- a/fs/nilfs2/cpfile.c +++ b/fs/nilfs2/cpfile.c @@ -307,7 +307,7 @@ int nilfs_cpfile_delete_checkpoints(struct inode *cpfile, ret = nilfs_cpfile_get_checkpoint_block(cpfile, cno, 0, &cp_bh); if (ret < 0) { if (ret != -ENOENT) - goto out_header; + break; /* skip hole */ ret = 0; continue; @@ -340,7 +340,7 @@ int nilfs_cpfile_delete_checkpoints(struct inode *cpfile, continue; printk(KERN_ERR "%s: cannot delete block\n", __func__); - goto out_header; + break; } } @@ -358,7 +358,6 @@ int nilfs_cpfile_delete_checkpoints(struct inode *cpfile, kunmap_atomic(kaddr, KM_USER0); } - out_header: brelse(header_bh); out_sem: -- cgit v0.10.2