diff options
| -rw-r--r-- | fs/nfs/pnfs.c | 81 |
1 files changed, 56 insertions, 25 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index d3c2ca71a76d..108a619861e5 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -346,8 +346,7 @@ pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo, /* Return true if layoutreturn is needed */ static bool pnfs_layout_need_return(struct pnfs_layout_hdr *lo, - struct pnfs_layout_segment *lseg, - nfs4_stateid *stateid, enum pnfs_iomode *iomode) + struct pnfs_layout_segment *lseg) { struct pnfs_layout_segment *s; @@ -355,17 +354,54 @@ pnfs_layout_need_return(struct pnfs_layout_hdr *lo, return false; list_for_each_entry(s, &lo->plh_segs, pls_list) - if (test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)) + if (s != lseg && test_bit(NFS_LSEG_LAYOUTRETURN, &s->pls_flags)) return false; - *stateid = lo->plh_stateid; - *iomode = lo->plh_return_iomode; - /* decreased in pnfs_send_layoutreturn() */ - lo->plh_block_lgets++; - lo->plh_return_iomode = 0; return true; } +static void pnfs_layoutreturn_free_lseg(struct work_struct *work) +{ + struct pnfs_layout_segment *lseg; + struct pnfs_layout_hdr *lo; + struct inode *inode; + + lseg = container_of(work, struct pnfs_layout_segment, pls_work); + WARN_ON(atomic_read(&lseg->pls_refcount)); + lo = lseg->pls_layout; + inode = lo->plh_inode; + + spin_lock(&inode->i_lock); + if (pnfs_layout_need_return(lo, lseg)) { + nfs4_stateid stateid; + enum pnfs_iomode iomode; + + stateid = lo->plh_stateid; + iomode = lo->plh_return_iomode; + /* decreased in pnfs_send_layoutreturn() */ + lo->plh_block_lgets++; + lo->plh_return_iomode = 0; + spin_unlock(&inode->i_lock); + + pnfs_send_layoutreturn(lo, stateid, iomode, true); + spin_lock(&inode->i_lock); + } else + /* match pnfs_get_layout_hdr #2 in pnfs_put_lseg */ + pnfs_put_layout_hdr(lo); + pnfs_layout_remove_lseg(lo, lseg); + spin_unlock(&inode->i_lock); + pnfs_free_lseg(lseg); + /* match pnfs_get_layout_hdr #1 in pnfs_put_lseg */ + pnfs_put_layout_hdr(lo); +} + +static void +pnfs_layoutreturn_free_lseg_async(struct pnfs_layout_segment *lseg) +{ + INIT_WORK(&lseg->pls_work, pnfs_layoutreturn_free_lseg); + queue_work(nfsiod_workqueue, &lseg->pls_work); +} + void pnfs_put_lseg(struct pnfs_layout_segment *lseg) { @@ -381,21 +417,18 @@ pnfs_put_lseg(struct pnfs_layout_segment *lseg) lo = lseg->pls_layout; inode = lo->plh_inode; if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) { - bool need_return; - nfs4_stateid stateid; - enum pnfs_iomode iomode; - pnfs_get_layout_hdr(lo); - pnfs_layout_remove_lseg(lo, lseg); - need_return = pnfs_layout_need_return(lo, lseg, - &stateid, &iomode); - spin_unlock(&inode->i_lock); - pnfs_free_lseg(lseg); - if (need_return) - pnfs_send_layoutreturn(lo, stateid, iomode, - true); - else + if (pnfs_layout_need_return(lo, lseg)) { + spin_unlock(&inode->i_lock); + /* hdr reference dropped in nfs4_layoutreturn_release */ + pnfs_get_layout_hdr(lo); + pnfs_layoutreturn_free_lseg_async(lseg); + } else { + pnfs_layout_remove_lseg(lo, lseg); + spin_unlock(&inode->i_lock); + pnfs_free_lseg(lseg); pnfs_put_layout_hdr(lo); + } } } EXPORT_SYMBOL_GPL(pnfs_put_lseg); @@ -1059,8 +1092,7 @@ out_nolayout: } spin_unlock(&ino->i_lock); if (layoutreturn) - pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY, 0, - NFS4_MAX_UINT64, true); + pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY, true); return false; } @@ -1127,8 +1159,7 @@ out: spin_unlock(&ino->i_lock); if (layoutreturn) { rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL); - pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY, 0, - NFS4_MAX_UINT64, false); + pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY, false); } return found; } |