From 6b38e842bb832a3dbeb17e382404aef3c40ac5f9 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 30 Dec 2008 02:03:31 -0500 Subject: [PATCH] nfsd race fixes: ext4 Signed-off-by: Al Viro --- fs/ext4/ialloc.c | 6 +++++- fs/ext4/namei.c | 14 +++++++++++++- 2 files changed, 18 insertions(+), 2 deletions(-) diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c index 08cac9fcace..6e6052879aa 100644 --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -826,7 +826,10 @@ got: ext4_set_inode_flags(inode); if (IS_DIRSYNC(inode)) handle->h_sync = 1; - insert_inode_hash(inode); + if (insert_inode_locked(inode) < 0) { + err = -EINVAL; + goto fail_drop; + } spin_lock(&sbi->s_next_gen_lock); inode->i_generation = sbi->s_next_generation++; spin_unlock(&sbi->s_next_gen_lock); @@ -881,6 +884,7 @@ fail_drop: DQUOT_DROP(inode); inode->i_flags |= S_NOQUOTA; inode->i_nlink = 0; + unlock_new_inode(inode); iput(inode); brelse(bitmap_bh); return ERR_PTR(err); diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 63adcb79298..da98a9012fa 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -1693,9 +1693,11 @@ static int ext4_add_nondir(handle_t *handle, if (!err) { ext4_mark_inode_dirty(handle, inode); d_instantiate(dentry, inode); + unlock_new_inode(inode); return 0; } drop_nlink(inode); + unlock_new_inode(inode); iput(inode); return err; } @@ -1830,6 +1832,7 @@ retry: if (err) { out_clear_inode: clear_nlink(inode); + unlock_new_inode(inode); ext4_mark_inode_dirty(handle, inode); iput(inode); goto out_stop; @@ -1838,6 +1841,7 @@ out_clear_inode: ext4_update_dx_flag(dir); ext4_mark_inode_dirty(handle, dir); d_instantiate(dentry, inode); + unlock_new_inode(inode); out_stop: ext4_journal_stop(handle); if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries)) @@ -2212,6 +2216,7 @@ retry: mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS); if (err) { clear_nlink(inode); + unlock_new_inode(inode); ext4_mark_inode_dirty(handle, inode); iput(inode); goto out_stop; @@ -2262,7 +2267,14 @@ retry: ext4_inc_count(handle, inode); atomic_inc(&inode->i_count); - err = ext4_add_nondir(handle, dentry, inode); + err = ext4_add_entry(handle, dentry, inode); + if (!err) { + ext4_mark_inode_dirty(handle, inode); + d_instantiate(dentry, inode); + } else { + drop_nlink(inode); + iput(inode); + } ext4_journal_stop(handle); if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries)) goto retry; -- 2.41.0