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authorZhi Zhang <zhang.david2011@gmail.com>2018-01-24 16:24:33 +0300
committerIlya Dryomov <idryomov@gmail.com>2018-02-26 18:19:16 +0300
commit6ef0bc6ddee1f62310877a1d53b1ea1d0d8e51a2 (patch)
treea4657907e7179ff8d0ffe81c26cae5911790bc41 /fs/ceph
parent4a3928c6f8a53fa1aed28ccba227742486e8ddcb (diff)
downloadlinux-6ef0bc6ddee1f62310877a1d53b1ea1d0d8e51a2.tar.xz
ceph: flush dirty caps of unlinked inode ASAP
Client should release unlinked inode from its cache ASAP. But client can't release inode with dirty caps. Link: http://tracker.ceph.com/issues/22886 Signed-off-by: Zhi Zhang <zhang.david2011@gmail.com> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph')
-rw-r--r--fs/ceph/caps.c26
-rw-r--r--fs/ceph/dir.c28
-rw-r--r--fs/ceph/super.h2
3 files changed, 32 insertions, 24 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 6582c4507e6c..0e5bd3e3344e 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -3965,6 +3965,32 @@ void ceph_put_fmode(struct ceph_inode_info *ci, int fmode)
}
/*
+ * For a soon-to-be unlinked file, drop the AUTH_RDCACHE caps. If it
+ * looks like the link count will hit 0, drop any other caps (other
+ * than PIN) we don't specifically want (due to the file still being
+ * open).
+ */
+int ceph_drop_caps_for_unlink(struct inode *inode)
+{
+ struct ceph_inode_info *ci = ceph_inode(inode);
+ int drop = CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL;
+
+ spin_lock(&ci->i_ceph_lock);
+ if (inode->i_nlink == 1) {
+ drop |= ~(__ceph_caps_wanted(ci) | CEPH_CAP_PIN);
+
+ ci->i_ceph_flags |= CEPH_I_NODELAY;
+ if (__ceph_caps_dirty(ci)) {
+ struct ceph_mds_client *mdsc =
+ ceph_inode_to_client(inode)->mdsc;
+ __cap_delay_requeue_front(mdsc, ci);
+ }
+ }
+ spin_unlock(&ci->i_ceph_lock);
+ return drop;
+}
+
+/*
* Helpers for embedding cap and dentry lease releases into mds
* requests.
*
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 0c4346806e17..f1d9c6cc0491 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -1003,26 +1003,6 @@ static int ceph_link(struct dentry *old_dentry, struct inode *dir,
}
/*
- * For a soon-to-be unlinked file, drop the AUTH_RDCACHE caps. If it
- * looks like the link count will hit 0, drop any other caps (other
- * than PIN) we don't specifically want (due to the file still being
- * open).
- */
-static int drop_caps_for_unlink(struct inode *inode)
-{
- struct ceph_inode_info *ci = ceph_inode(inode);
- int drop = CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL;
-
- spin_lock(&ci->i_ceph_lock);
- if (inode->i_nlink == 1) {
- drop |= ~(__ceph_caps_wanted(ci) | CEPH_CAP_PIN);
- ci->i_ceph_flags |= CEPH_I_NODELAY;
- }
- spin_unlock(&ci->i_ceph_lock);
- return drop;
-}
-
-/*
* rmdir and unlink are differ only by the metadata op code
*/
static int ceph_unlink(struct inode *dir, struct dentry *dentry)
@@ -1056,7 +1036,7 @@ static int ceph_unlink(struct inode *dir, struct dentry *dentry)
set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags);
req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
- req->r_inode_drop = drop_caps_for_unlink(inode);
+ req->r_inode_drop = ceph_drop_caps_for_unlink(inode);
err = ceph_mdsc_do_request(mdsc, dir, req);
if (!err && !req->r_reply_info.head->is_dentry)
d_delete(dentry);
@@ -1104,8 +1084,10 @@ static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry,
req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
/* release LINK_RDCACHE on source inode (mds will lock it) */
req->r_old_inode_drop = CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL;
- if (d_really_is_positive(new_dentry))
- req->r_inode_drop = drop_caps_for_unlink(d_inode(new_dentry));
+ if (d_really_is_positive(new_dentry)) {
+ req->r_inode_drop =
+ ceph_drop_caps_for_unlink(d_inode(new_dentry));
+ }
err = ceph_mdsc_do_request(mdsc, old_dir, req);
if (!err && !req->r_reply_info.head->is_dentry) {
/*
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 21b2e5b004eb..1c2086e0fec2 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -987,7 +987,7 @@ extern void ceph_check_caps(struct ceph_inode_info *ci, int flags,
struct ceph_mds_session *session);
extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc);
extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc);
-
+extern int ceph_drop_caps_for_unlink(struct inode *inode);
extern int ceph_encode_inode_release(void **p, struct inode *inode,
int mds, int drop, int unless, int force);
extern int ceph_encode_dentry_release(void **p, struct dentry *dn,