diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-04-25 10:48:50 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-04-25 10:48:50 -0700 |
| commit | 8113a85f872003a9f5c58f9f143054b0d8ec73a5 (patch) | |
| tree | eddb62e625e4e9e016f1b766809962bcab204d13 /fs/ceph/inode.c | |
| parent | f6f3e747454fc539bbd7904cf70672368289d820 (diff) | |
| parent | 37659182bff1eeaaeadcfc8f853c6d2b6dbc3f47 (diff) | |
Merge tag 'ceph-for-5.1-rc7' of git://github.com/ceph/ceph-client
Pull ceph fixes from Ilya Dryomov:
"dentry name handling fixes from Jeff and a memory leak fix from Zheng.
Both are old issues, marked for stable"
* tag 'ceph-for-5.1-rc7' of git://github.com/ceph/ceph-client:
ceph: fix ci->i_head_snapc leak
ceph: handle the case where a dentry has been renamed on outstanding req
ceph: ensure d_name stability in ceph_dentry_hash()
ceph: only use d_name directly when parent is locked
Diffstat (limited to 'fs/ceph/inode.c')
| -rw-r--r-- | fs/ceph/inode.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 2d61ddda9bf5..c2feb310ac1e 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -1163,6 +1163,19 @@ static int splice_dentry(struct dentry **pdn, struct inode *in) return 0; } +static int d_name_cmp(struct dentry *dentry, const char *name, size_t len) +{ + int ret; + + /* take d_lock to ensure dentry->d_name stability */ + spin_lock(&dentry->d_lock); + ret = dentry->d_name.len - len; + if (!ret) + ret = memcmp(dentry->d_name.name, name, len); + spin_unlock(&dentry->d_lock); + return ret; +} + /* * Incorporate results into the local cache. This is either just * one inode, or a directory, dentry, and possibly linked-to inode (e.g., @@ -1412,7 +1425,8 @@ retry_lookup: err = splice_dentry(&req->r_dentry, in); if (err < 0) goto done; - } else if (rinfo->head->is_dentry) { + } else if (rinfo->head->is_dentry && + !d_name_cmp(req->r_dentry, rinfo->dname, rinfo->dname_len)) { struct ceph_vino *ptvino = NULL; if ((le32_to_cpu(rinfo->diri.in->cap.caps) & CEPH_CAP_FILE_SHARED) || |