unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
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ceph: keep reference to parent inode on ceph_dentry

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When creating a new dentry we now hold a reference to the parent
inode in the ceph_dentry.  This is required due to the new RCU
changes from 949854d0, which set dentry->d_parent to NULL in d_kill before
calling the ->release() callback.  If/when that behavior is changed, we can
revert this hack.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Yehuda Sadeh 2011-01-18 13:37:28 -08:00 committed by Sage Weil
parent e8e1ba96b2
commit 97d79b403e
2 changed files with 5 additions and 1 deletions
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5
fs/ceph/dir.c
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@ -60,6 +60,7 @@ int ceph_init_dentry(struct dentry *dentry)
}
di->dentry = dentry;
di->lease_session = NULL;
di->parent_inode = igrab(dentry->d_parent->d_inode);
dentry->d_fsdata = di;
dentry->d_time = jiffies;
ceph_dentry_lru_add(dentry);
@ -1025,7 +1026,7 @@ static void ceph_dentry_release(struct dentry *dentry)
u64 snapid = CEPH_NOSNAP;
if (!IS_ROOT(dentry)) {
parent_inode = dentry->d_parent->d_inode;
parent_inode = di->parent_inode;
if (parent_inode)
snapid = ceph_snap(parent_inode);
}
@ -1050,6 +1051,8 @@ static void ceph_dentry_release(struct dentry *dentry)
kmem_cache_free(ceph_dentry_cachep, di);
dentry->d_fsdata = NULL;
}
if (parent_inode)
iput(parent_inode);
}
static int ceph_snapdir_d_revalidate(struct dentry *dentry,

1
fs/ceph/super.h
View file

@ -207,6 +207,7 @@ struct ceph_dentry_info {
struct dentry *dentry;
u64 time;
u64 offset;
struct inode *parent_inode;
};
struct ceph_inode_xattrs_info {