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Diffstat (limited to 'fs/ceph/snap.c')
-rw-r--r--fs/ceph/snap.c89
1 files changed, 58 insertions, 31 deletions
diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c
index c0b26b6badba..4868b9dcac5a 100644
--- a/fs/ceph/snap.c
+++ b/fs/ceph/snap.c
@@ -435,7 +435,7 @@ void ceph_queue_cap_snap(struct ceph_inode_info *ci)
{
struct inode *inode = &ci->vfs_inode;
struct ceph_cap_snap *capsnap;
- int used;
+ int used, dirty;
capsnap = kzalloc(sizeof(*capsnap), GFP_NOFS);
if (!capsnap) {
@@ -445,6 +445,7 @@ void ceph_queue_cap_snap(struct ceph_inode_info *ci)
spin_lock(&inode->i_lock);
used = __ceph_caps_used(ci);
+ dirty = __ceph_caps_dirty(ci);
if (__ceph_have_pending_cap_snap(ci)) {
/* there is no point in queuing multiple "pending" cap_snaps,
as no new writes are allowed to start when pending, so any
@@ -452,11 +453,15 @@ void ceph_queue_cap_snap(struct ceph_inode_info *ci)
cap_snap. lucky us. */
dout("queue_cap_snap %p already pending\n", inode);
kfree(capsnap);
- } else if (ci->i_wrbuffer_ref_head || (used & CEPH_CAP_FILE_WR)) {
+ } else if (ci->i_wrbuffer_ref_head || (used & CEPH_CAP_FILE_WR) ||
+ (dirty & (CEPH_CAP_AUTH_EXCL|CEPH_CAP_XATTR_EXCL|
+ CEPH_CAP_FILE_EXCL|CEPH_CAP_FILE_WR))) {
struct ceph_snap_context *snapc = ci->i_head_snapc;
+ dout("queue_cap_snap %p cap_snap %p queuing under %p\n", inode,
+ capsnap, snapc);
igrab(inode);
-
+
atomic_set(&capsnap->nref, 1);
capsnap->ci = ci;
INIT_LIST_HEAD(&capsnap->ci_item);
@@ -464,15 +469,21 @@ void ceph_queue_cap_snap(struct ceph_inode_info *ci)
capsnap->follows = snapc->seq - 1;
capsnap->issued = __ceph_caps_issued(ci, NULL);
- capsnap->dirty = __ceph_caps_dirty(ci);
+ capsnap->dirty = dirty;
capsnap->mode = inode->i_mode;
capsnap->uid = inode->i_uid;
capsnap->gid = inode->i_gid;
- /* fixme? */
- capsnap->xattr_blob = NULL;
- capsnap->xattr_len = 0;
+ if (dirty & CEPH_CAP_XATTR_EXCL) {
+ __ceph_build_xattrs_blob(ci);
+ capsnap->xattr_blob =
+ ceph_buffer_get(ci->i_xattrs.blob);
+ capsnap->xattr_version = ci->i_xattrs.version;
+ } else {
+ capsnap->xattr_blob = NULL;
+ capsnap->xattr_version = 0;
+ }
/* dirty page count moved from _head to this cap_snap;
all subsequent writes page dirties occur _after_ this
@@ -480,7 +491,9 @@ void ceph_queue_cap_snap(struct ceph_inode_info *ci)
capsnap->dirty_pages = ci->i_wrbuffer_ref_head;
ci->i_wrbuffer_ref_head = 0;
capsnap->context = snapc;
- ci->i_head_snapc = NULL;
+ ci->i_head_snapc =
+ ceph_get_snap_context(ci->i_snap_realm->cached_context);
+ dout(" new snapc is %p\n", ci->i_head_snapc);
list_add_tail(&capsnap->ci_item, &ci->i_cap_snaps);
if (used & CEPH_CAP_FILE_WR) {
@@ -539,6 +552,41 @@ int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
return 1; /* caller may want to ceph_flush_snaps */
}
+/*
+ * Queue cap_snaps for snap writeback for this realm and its children.
+ * Called under snap_rwsem, so realm topology won't change.
+ */
+static void queue_realm_cap_snaps(struct ceph_snap_realm *realm)
+{
+ struct ceph_inode_info *ci;
+ struct inode *lastinode = NULL;
+ struct ceph_snap_realm *child;
+
+ dout("queue_realm_cap_snaps %p %llx inodes\n", realm, realm->ino);
+
+ spin_lock(&realm->inodes_with_caps_lock);
+ list_for_each_entry(ci, &realm->inodes_with_caps,
+ i_snap_realm_item) {
+ struct inode *inode = igrab(&ci->vfs_inode);
+ if (!inode)
+ continue;
+ spin_unlock(&realm->inodes_with_caps_lock);
+ if (lastinode)
+ iput(lastinode);
+ lastinode = inode;
+ ceph_queue_cap_snap(ci);
+ spin_lock(&realm->inodes_with_caps_lock);
+ }
+ spin_unlock(&realm->inodes_with_caps_lock);
+ if (lastinode)
+ iput(lastinode);
+
+ dout("queue_realm_cap_snaps %p %llx children\n", realm, realm->ino);
+ list_for_each_entry(child, &realm->children, child_item)
+ queue_realm_cap_snaps(child);
+
+ dout("queue_realm_cap_snaps %p %llx done\n", realm, realm->ino);
+}
/*
* Parse and apply a snapblob "snap trace" from the MDS. This specifies
@@ -589,29 +637,8 @@ more:
*
* ...unless it's a snap deletion!
*/
- if (!deletion) {
- struct ceph_inode_info *ci;
- struct inode *lastinode = NULL;
-
- spin_lock(&realm->inodes_with_caps_lock);
- list_for_each_entry(ci, &realm->inodes_with_caps,
- i_snap_realm_item) {
- struct inode *inode = igrab(&ci->vfs_inode);
- if (!inode)
- continue;
- spin_unlock(&realm->inodes_with_caps_lock);
- if (lastinode)
- iput(lastinode);
- lastinode = inode;
- ceph_queue_cap_snap(ci);
- spin_lock(&realm->inodes_with_caps_lock);
- }
- spin_unlock(&realm->inodes_with_caps_lock);
- if (lastinode)
- iput(lastinode);
- dout("update_snap_trace cap_snaps queued\n");
- }
-
+ if (!deletion)
+ queue_realm_cap_snaps(realm);
} else {
dout("update_snap_trace %llx %p seq %lld unchanged\n",
realm->ino, realm, realm->seq);