diff options
Diffstat (limited to 'fs/nfs/unlink.c')
| -rw-r--r-- | fs/nfs/unlink.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/nfs/unlink.c b/fs/nfs/unlink.c index 6481d537d69d..8d6864c2a5fa 100644 --- a/fs/nfs/unlink.c +++ b/fs/nfs/unlink.c @@ -148,6 +148,7 @@ static int nfs_do_call_unlink(struct dentry *parent, struct inode *dir, struct n alias = d_lookup(parent, &data->args.name); if (alias != NULL) { int ret = 0; + void *devname_garbage = NULL; /* * Hey, we raced with lookup... See if we need to transfer @@ -157,6 +158,7 @@ static int nfs_do_call_unlink(struct dentry *parent, struct inode *dir, struct n spin_lock(&alias->d_lock); if (alias->d_inode != NULL && !(alias->d_flags & DCACHE_NFSFS_RENAMED)) { + devname_garbage = alias->d_fsdata; alias->d_fsdata = data; alias->d_flags |= DCACHE_NFSFS_RENAMED; ret = 1; @@ -164,6 +166,13 @@ static int nfs_do_call_unlink(struct dentry *parent, struct inode *dir, struct n spin_unlock(&alias->d_lock); nfs_dec_sillycount(dir); dput(alias); + /* + * If we'd displaced old cached devname, free it. At that + * point dentry is definitely not a root, so we won't need + * that anymore. + */ + if (devname_garbage) + kfree(devname_garbage); return ret; } data->dir = igrab(dir); @@ -252,6 +261,7 @@ nfs_async_unlink(struct inode *dir, struct dentry *dentry) { struct nfs_unlinkdata *data; int status = -ENOMEM; + void *devname_garbage = NULL; data = kzalloc(sizeof(*data), GFP_KERNEL); if (data == NULL) @@ -269,8 +279,16 @@ nfs_async_unlink(struct inode *dir, struct dentry *dentry) if (dentry->d_flags & DCACHE_NFSFS_RENAMED) goto out_unlock; dentry->d_flags |= DCACHE_NFSFS_RENAMED; + devname_garbage = dentry->d_fsdata; dentry->d_fsdata = data; spin_unlock(&dentry->d_lock); + /* + * If we'd displaced old cached devname, free it. At that + * point dentry is definitely not a root, so we won't need + * that anymore. + */ + if (devname_garbage) + kfree(devname_garbage); return 0; out_unlock: spin_unlock(&dentry->d_lock); @@ -299,6 +317,7 @@ nfs_complete_unlink(struct dentry *dentry, struct inode *inode) if (dentry->d_flags & DCACHE_NFSFS_RENAMED) { dentry->d_flags &= ~DCACHE_NFSFS_RENAMED; data = dentry->d_fsdata; + dentry->d_fsdata = NULL; } spin_unlock(&dentry->d_lock); @@ -315,6 +334,7 @@ nfs_cancel_async_unlink(struct dentry *dentry) struct nfs_unlinkdata *data = dentry->d_fsdata; dentry->d_flags &= ~DCACHE_NFSFS_RENAMED; + dentry->d_fsdata = NULL; spin_unlock(&dentry->d_lock); nfs_free_unlinkdata(data); return; |