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ceph: fix ceph_fh_to_parent() 

ceph_fh_to_parent() returns dentry that corresponds to the 'ino' field
of struct ceph_nfs_confh. This is wrong, it should return dentry that
corresponds to the 'parent_ino' field.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Sage Weil <sage@inktank.com>
This commit is contained in:
Yan, Zheng 2014-03-01 23:09:05 +08:00
parent 9017c2ec78
commit 8996f4f23d
1 changed files with 9 additions and 33 deletions
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42
fs/ceph/export.c
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@ -181,48 +181,24 @@ struct dentry *ceph_get_parent(struct dentry *child)
} }
/* /*
* get parent, if possible. * convert regular fh to parent
*
* FIXME: we could do better by querying the mds to discover the
* parent.
*/ */
static struct dentry *ceph_fh_to_parent(struct super_block *sb, static struct dentry *ceph_fh_to_parent(struct super_block *sb,
struct fid *fid, struct fid *fid,
int fh_len, int fh_type) int fh_len, int fh_type)
{ {
struct ceph_nfs_confh *cfh = (void *)fid->raw; struct ceph_nfs_confh *cfh = (void *)fid->raw;
struct ceph_vino vino;
struct inode *inode;
struct dentry *dentry; struct dentry *dentry;
int err;
if (fh_type == 1) if (fh_type != FILEID_INO32_GEN_PARENT)
return ERR_PTR(-ESTALE); return NULL;
if (fh_len < sizeof(*cfh) / 4) if (fh_len < sizeof(*cfh) / 4)
return ERR_PTR(-ESTALE); return NULL;
pr_debug("fh_to_parent %llx/%d\n", cfh->parent_ino, dout("fh_to_parent %llx\n", cfh->parent_ino);
cfh->parent_name_hash); dentry = __get_parent(sb, NULL, cfh->ino);
if (IS_ERR(dentry) && PTR_ERR(dentry) == -ENOENT)
vino.ino = cfh->ino; dentry = __fh_to_dentry(sb, cfh->parent_ino);
vino.snap = CEPH_NOSNAP;
inode = ceph_find_inode(sb, vino);
if (!inode)
return ERR_PTR(-ESTALE);
dentry = d_obtain_alias(inode);
if (IS_ERR(dentry)) {
pr_err("fh_to_parent %llx -- inode %p but ENOMEM\n",
cfh->ino, inode);
iput(inode);
return dentry;
}
err = ceph_init_dentry(dentry);
if (err < 0) {
iput(inode);
return ERR_PTR(err);
}
dout("fh_to_parent %llx %p dentry %p\n", cfh->ino, inode, dentry);
return dentry; return dentry;
} }