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authorYan, Zheng <zheng.z.yan@intel.com>2013-11-30 12:47:41 +0800
committerYan, Zheng <zheng.z.yan@intel.com>2014-01-21 13:29:33 +0800
commit9215aeea622fec7ca8123c6bd6f03a1753e2b0b3 (patch)
tree00c4aaae67c7891553f8331b6e0b6e54bf95d08f /fs/ceph
parentca18bede048e95a749d13410ce1da4ad0ffa7938 (diff)
downloadlinux-9215aeea622fec7ca8123c6bd6f03a1753e2b0b3.tar.bz2
ceph: check inode caps in ceph_d_revalidate
Some inodes in readdir reply may have no caps. Getattr mds request for these inodes can return -ESTALE. The fix is consider dentry that links to inode with no caps as invalid. Invalid dentry causes a lookup request to send to the mds, the MDS will send caps back. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Diffstat (limited to 'fs/ceph')
-rw-r--r--fs/ceph/caps.c12
-rw-r--r--fs/ceph/dir.c11
-rw-r--r--fs/ceph/super.h1
3 files changed, 21 insertions, 3 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index d2154d63f671..d65ff334901c 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -891,6 +891,18 @@ static int __ceph_is_any_caps(struct ceph_inode_info *ci)
return !RB_EMPTY_ROOT(&ci->i_caps) || ci->i_cap_exporting_mds >= 0;
}
+int ceph_is_any_caps(struct inode *inode)
+{
+ struct ceph_inode_info *ci = ceph_inode(inode);
+ int ret;
+
+ spin_lock(&ci->i_ceph_lock);
+ ret = __ceph_is_any_caps(ci);
+ spin_unlock(&ci->i_ceph_lock);
+
+ return ret;
+}
+
/*
* Remove a cap. Take steps to deal with a racing iterate_session_caps.
*
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index b629e9d59a35..619616d585b0 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -1041,14 +1041,19 @@ static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags)
valid = 1;
} else if (dentry_lease_is_valid(dentry) ||
dir_lease_is_valid(dir, dentry)) {
- valid = 1;
+ if (dentry->d_inode)
+ valid = ceph_is_any_caps(dentry->d_inode);
+ else
+ valid = 1;
}
dout("d_revalidate %p %s\n", dentry, valid ? "valid" : "invalid");
- if (valid)
+ if (valid) {
ceph_dentry_lru_touch(dentry);
- else
+ } else {
+ ceph_dir_clear_complete(dir);
d_drop(dentry);
+ }
iput(dir);
return valid;
}
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 891cda8c72aa..a6ba32fb0d49 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -782,6 +782,7 @@ extern int ceph_add_cap(struct inode *inode,
extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release);
extern void ceph_put_cap(struct ceph_mds_client *mdsc,
struct ceph_cap *cap);
+extern int ceph_is_any_caps(struct inode *inode);
extern void __queue_cap_release(struct ceph_mds_session *session, u64 ino,
u64 cap_id, u32 migrate_seq, u32 issue_seq);