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nfsd race fixes: ext4 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
hifive-unleashed-5.1
Al Viro 2008-12-30 02:03:31 -05:00
parent c38012daa7
commit 6b38e842bb
2 changed files with 18 additions and 2 deletions
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6
fs/ext4/ialloc.c
View File

@ -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);

14
fs/ext4/namei.c
View File

@ -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;