Commit 2e32cf5e authored by Al Viro's avatar Al Viro
Browse files

cifs: rcu-delay unload_nls() and freeing sbi



makes ->d_hash(), ->d_compare() and ->permission() safety in RCU mode
independent from vfsmount_lock.
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent baa40671
......@@ -65,5 +65,6 @@ struct cifs_sb_info {
char *mountdata; /* options received at mount time or via DFS refs */
struct backing_dev_info bdi;
struct delayed_work prune_tlinks;
struct rcu_head rcu;
};
#endif /* _CIFS_FS_SB_H */
......@@ -3755,6 +3755,13 @@ CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
return rc;
}
static void delayed_free(struct rcu_head *p)
{
struct cifs_sb_info *sbi = container_of(p, struct cifs_sb_info, rcu);
unload_nls(sbi->local_nls);
kfree(sbi);
}
void
cifs_umount(struct cifs_sb_info *cifs_sb)
{
......@@ -3779,8 +3786,7 @@ cifs_umount(struct cifs_sb_info *cifs_sb)
bdi_destroy(&cifs_sb->bdi);
kfree(cifs_sb->mountdata);
unload_nls(cifs_sb->local_nls);
kfree(cifs_sb);
call_rcu(&cifs_sb->rcu, delayed_free);
}
int
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment