diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ceph/caps.c | 50 | ||||
| -rw-r--r-- | fs/ceph/inode.c | 1 | ||||
| -rw-r--r-- | fs/ceph/mds_client.c | 93 | ||||
| -rw-r--r-- | fs/ceph/mds_client.h | 2 | ||||
| -rw-r--r-- | fs/ceph/super.h | 2 |
5 files changed, 91 insertions, 57 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 9a25f8d..0295048 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -1415,6 +1415,29 @@ static void __add_cap_flushing_to_inode(struct ceph_inode_info *ci, rb_insert_color(&cf->i_node, &ci->i_cap_flush_tree); } +static void __add_cap_flushing_to_mdsc(struct ceph_mds_client *mdsc, + struct ceph_cap_flush *cf) +{ + struct rb_node **p = &mdsc->cap_flush_tree.rb_node; + struct rb_node *parent = NULL; + struct ceph_cap_flush *other = NULL; + + while (*p) { + parent = *p; + other = rb_entry(parent, struct ceph_cap_flush, g_node); + + if (cf->tid < other->tid) + p = &(*p)->rb_left; + else if (cf->tid > other->tid) + p = &(*p)->rb_right; + else + BUG(); + } + + rb_link_node(&cf->g_node, parent, p); + rb_insert_color(&cf->g_node, &mdsc->cap_flush_tree); +} + /* * Add dirty inode to the flushing list. Assigned a seq number so we * can wait for caps to flush without starving. @@ -1449,17 +1472,16 @@ static int __mark_caps_flushing(struct inode *inode, list_del_init(&ci->i_dirty_item); cf->tid = ++mdsc->last_cap_flush_tid; + __add_cap_flushing_to_mdsc(mdsc, cf); if (list_empty(&ci->i_flushing_item)) { - ci->i_cap_flush_seq = ++mdsc->cap_flush_seq; list_add_tail(&ci->i_flushing_item, &session->s_cap_flushing); mdsc->num_cap_flushing++; - dout(" inode %p now flushing seq %lld\n", inode, - ci->i_cap_flush_seq); + dout(" inode %p now flushing tid %llu\n", inode, cf->tid); } else { list_move_tail(&ci->i_flushing_item, &session->s_cap_flushing); - dout(" inode %p now flushing (more) seq %lld\n", inode, - ci->i_cap_flush_seq); + dout(" inode %p now flushing (more) tid %llu\n", + inode, cf->tid); } spin_unlock(&mdsc->cap_dirty_lock); @@ -2123,8 +2145,8 @@ static void kick_flushing_inode_caps(struct ceph_mds_client *mdsc, spin_lock(&ci->i_ceph_lock); cap = ci->i_auth_cap; - dout("kick_flushing_inode_caps %p flushing %s flush_seq %lld\n", inode, - ceph_cap_string(ci->i_flushing_caps), ci->i_cap_flush_seq); + dout("kick_flushing_inode_caps %p flushing %s\n", inode, + ceph_cap_string(ci->i_flushing_caps)); __ceph_flush_snaps(ci, &session, 1); @@ -2921,12 +2943,23 @@ static void handle_cap_flush_ack(struct inode *inode, u64 flush_tid, ceph_cap_string(cleaned), ceph_cap_string(ci->i_flushing_caps), ceph_cap_string(ci->i_flushing_caps & ~cleaned)); - if (ci->i_flushing_caps == (ci->i_flushing_caps & ~cleaned)) + if (list_empty(&to_remove) && !cleaned) goto out; ci->i_flushing_caps &= ~cleaned; spin_lock(&mdsc->cap_dirty_lock); + + if (!list_empty(&to_remove)) { + list_for_each_entry(cf, &to_remove, list) + rb_erase(&cf->g_node, &mdsc->cap_flush_tree); + + n = rb_first(&mdsc->cap_flush_tree); + cf = n ? rb_entry(n, struct ceph_cap_flush, g_node) : NULL; + if (!cf || cf->tid > flush_tid) + wake_up_all(&mdsc->cap_flushing_wq); + } + if (ci->i_flushing_caps == 0) { list_del_init(&ci->i_flushing_item); if (!list_empty(&session->s_cap_flushing)) @@ -2936,7 +2969,6 @@ static void handle_cap_flush_ack(struct inode *inode, u64 flush_tid, struct ceph_inode_info, i_flushing_item)->vfs_inode); mdsc->num_cap_flushing--; - wake_up_all(&mdsc->cap_flushing_wq); dout(" inode %p now !flushing\n", inode); if (ci->i_dirty_caps == 0) { diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 6d3f19d..3326302f 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -416,7 +416,6 @@ struct inode *ceph_alloc_inode(struct super_block *sb) ci->i_flushing_caps = 0; INIT_LIST_HEAD(&ci->i_dirty_item); INIT_LIST_HEAD(&ci->i_flushing_item); - ci->i_cap_flush_seq = 0; ci->i_cap_flush_tree = RB_ROOT; init_waitqueue_head(&ci->i_cap_wq); ci->i_hold_caps_min = 0; diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 839901f..31f6a78 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -1164,6 +1164,10 @@ static int remove_session_caps_cb(struct inode *inode, struct ceph_cap *cap, } spin_lock(&mdsc->cap_dirty_lock); + + list_for_each_entry(cf, &to_remove, list) + rb_erase(&cf->g_node, &mdsc->cap_flush_tree); + if (!list_empty(&ci->i_dirty_item)) { pr_warn_ratelimited( " dropping dirty %s state for %p %lld\n", @@ -1467,39 +1471,56 @@ static int trim_caps(struct ceph_mds_client *mdsc, return 0; } -static int check_cap_flush(struct ceph_inode_info *ci, - u64 want_flush_seq, u64 want_snap_seq) +static int check_capsnap_flush(struct ceph_inode_info *ci, + u64 want_snap_seq) { - int ret1 = 1, ret2 = 1; + int ret = 1; spin_lock(&ci->i_ceph_lock); - if (want_flush_seq > 0 && ci->i_flushing_caps) - ret1 = ci->i_cap_flush_seq >= want_flush_seq; - if (want_snap_seq > 0 && !list_empty(&ci->i_cap_snaps)) { struct ceph_cap_snap *capsnap = list_first_entry(&ci->i_cap_snaps, struct ceph_cap_snap, ci_item); - ret2 = capsnap->follows >= want_snap_seq; + ret = capsnap->follows >= want_snap_seq; } spin_unlock(&ci->i_ceph_lock); - return ret1 && ret2; + return ret; +} + +static int check_caps_flush(struct ceph_mds_client *mdsc, + u64 want_flush_tid) +{ + struct rb_node *n; + struct ceph_cap_flush *cf; + int ret = 1; + + spin_lock(&mdsc->cap_dirty_lock); + n = rb_first(&mdsc->cap_flush_tree); + cf = n ? rb_entry(n, struct ceph_cap_flush, g_node) : NULL; + if (cf && cf->tid <= want_flush_tid) { + dout("check_caps_flush still flushing tid %llu <= %llu\n", + cf->tid, want_flush_tid); + ret = 0; + } + spin_unlock(&mdsc->cap_dirty_lock); + return ret; } /* * flush all dirty inode data to disk. * - * returns true if we've flushed through want_flush_seq + * returns true if we've flushed through want_flush_tid */ static void wait_caps_flush(struct ceph_mds_client *mdsc, - u64 want_flush_seq, u64 want_snap_seq) + u64 want_flush_tid, u64 want_snap_seq) { int mds; - dout("check_cap_flush want %lld\n", want_flush_seq); + dout("check_caps_flush want %llu snap want %llu\n", + want_flush_tid, want_snap_seq); mutex_lock(&mdsc->mutex); for (mds = 0; mds < mdsc->max_sessions; ) { struct ceph_mds_session *session = mdsc->sessions[mds]; - struct inode *inode1 = NULL, *inode2 = NULL; + struct inode *inode = NULL; if (!session) { mds++; @@ -1509,58 +1530,40 @@ static void wait_caps_flush(struct ceph_mds_client *mdsc, mutex_unlock(&mdsc->mutex); mutex_lock(&session->s_mutex); - if (!list_empty(&session->s_cap_flushing)) { - struct ceph_inode_info *ci = - list_first_entry(&session->s_cap_flushing, - struct ceph_inode_info, - i_flushing_item); - - if (!check_cap_flush(ci, want_flush_seq, 0)) { - dout("check_cap_flush still flushing %p " - "seq %lld <= %lld to mds%d\n", - &ci->vfs_inode, ci->i_cap_flush_seq, - want_flush_seq, mds); - inode1 = igrab(&ci->vfs_inode); - } - } if (!list_empty(&session->s_cap_snaps_flushing)) { struct ceph_cap_snap *capsnap = list_first_entry(&session->s_cap_snaps_flushing, struct ceph_cap_snap, flushing_item); struct ceph_inode_info *ci = capsnap->ci; - if (!check_cap_flush(ci, 0, want_snap_seq)) { + if (!check_capsnap_flush(ci, want_snap_seq)) { dout("check_cap_flush still flushing snap %p " "follows %lld <= %lld to mds%d\n", &ci->vfs_inode, capsnap->follows, want_snap_seq, mds); - inode2 = igrab(&ci->vfs_inode); + inode = igrab(&ci->vfs_inode); } } mutex_unlock(&session->s_mutex); ceph_put_mds_session(session); - if (inode1) { - wait_event(mdsc->cap_flushing_wq, - check_cap_flush(ceph_inode(inode1), - want_flush_seq, 0)); - iput(inode1); - } - if (inode2) { + if (inode) { wait_event(mdsc->cap_flushing_wq, - check_cap_flush(ceph_inode(inode2), - 0, want_snap_seq)); - iput(inode2); - } - - if (!inode1 && !inode2) + check_capsnap_flush(ceph_inode(inode), + want_snap_seq)); + iput(inode); + } else { mds++; + } mutex_lock(&mdsc->mutex); } - mutex_unlock(&mdsc->mutex); - dout("check_cap_flush ok, flushed thru %lld\n", want_flush_seq); + + wait_event(mdsc->cap_flushing_wq, + check_caps_flush(mdsc, want_flush_tid)); + + dout("check_caps_flush ok, flushed thru %llu\n", want_flush_tid); } /* @@ -3426,8 +3429,8 @@ int ceph_mdsc_init(struct ceph_fs_client *fsc) spin_lock_init(&mdsc->cap_delay_lock); INIT_LIST_HEAD(&mdsc->snap_flush_list); spin_lock_init(&mdsc->snap_flush_lock); - mdsc->cap_flush_seq = 0; mdsc->last_cap_flush_tid = 1; + mdsc->cap_flush_tree = RB_ROOT; INIT_LIST_HEAD(&mdsc->cap_dirty); INIT_LIST_HEAD(&mdsc->cap_dirty_migrating); mdsc->num_cap_flushing = 0; @@ -3554,7 +3557,7 @@ void ceph_mdsc_sync(struct ceph_mds_client *mdsc) ceph_flush_dirty_caps(mdsc); spin_lock(&mdsc->cap_dirty_lock); - want_flush = mdsc->cap_flush_seq; + want_flush = mdsc->last_cap_flush_tid; spin_unlock(&mdsc->cap_dirty_lock); down_read(&mdsc->snap_rwsem); diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h index 19f6084..470be4e 100644 --- a/fs/ceph/mds_client.h +++ b/fs/ceph/mds_client.h @@ -306,8 +306,8 @@ struct ceph_mds_client { struct list_head snap_flush_list; /* cap_snaps ready to flush */ spinlock_t snap_flush_lock; - u64 cap_flush_seq; u64 last_cap_flush_tid; + struct rb_root cap_flush_tree; struct list_head cap_dirty; /* inodes with dirty caps */ struct list_head cap_dirty_migrating; /* ...that are migration... */ int num_cap_flushing; /* # caps we are flushing */ diff --git a/fs/ceph/super.h b/fs/ceph/super.h index cc597f5..94d9147 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -189,6 +189,7 @@ static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap) struct ceph_cap_flush { u64 tid; int caps; + struct rb_node g_node; union { struct rb_node i_node; struct list_head list; @@ -304,7 +305,6 @@ struct ceph_inode_info { struct ceph_cap *i_auth_cap; /* authoritative cap, if any */ unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */ struct list_head i_dirty_item, i_flushing_item; - u64 i_cap_flush_seq; /* we need to track cap writeback on a per-cap-bit basis, to allow * overlapping, pipelined cap flushes to the mds. we can probably * reduce the tid to 8 bits if we're concerned about inode size. */ |
