nfsd race fixes: ext4
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 08cac9f..6e60528 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -826,7 +826,10 @@
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 @@
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 63adcb7..da98a90 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1693,9 +1693,11 @@
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 @@
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 @@
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 @@
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 @@
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;