From c88953d87f5c8cd95bebcbd6d15f2f0cdd348136 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 10 Sep 2014 08:23:31 -0700 Subject: [PATCH] pnfs: add return_range method If a layout driver keeps per-inode state outside of the layout segments it needs to be notified of any layout returns or recalls on an inode, and not just about the freeing of layout segments. Add a method to acomplish this, which will allow the block layout driver to handle the case of truncated and re-expanded files properly. Signed-off-by: Christoph Hellwig Signed-off-by: Trond Myklebust --- fs/nfs/callback_proc.c | 12 +++++++++--- fs/nfs/pnfs.c | 10 ++++++++++ fs/nfs/pnfs.h | 3 +++ 3 files changed, 22 insertions(+), 3 deletions(-) diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c index 0d269515c64d..56bd0eaf645e 100644 --- a/fs/nfs/callback_proc.c +++ b/fs/nfs/callback_proc.c @@ -181,10 +181,16 @@ static u32 initiate_file_draining(struct nfs_client *clp, spin_lock(&ino->i_lock); if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || pnfs_mark_matching_lsegs_invalid(lo, &free_me_list, - &args->cbl_range)) + &args->cbl_range)) { rv = NFS4ERR_DELAY; - else - rv = NFS4ERR_NOMATCHING_LAYOUT; + goto unlock; + } + + if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) { + NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, + &args->cbl_range); + } +unlock: spin_unlock(&ino->i_lock); pnfs_free_lseg_list(&free_me_list); pnfs_put_layout_hdr(lo); diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index ce5d1ea695d1..76de7f568119 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -857,6 +857,16 @@ _pnfs_return_layout(struct inode *ino) empty = list_empty(&lo->plh_segs); pnfs_clear_layoutcommit(ino, &tmp_list); pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); + + if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) { + struct pnfs_layout_range range = { + .iomode = IOMODE_ANY, + .offset = 0, + .length = NFS4_MAX_UINT64, + }; + NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, &range); + } + /* Don't send a LAYOUTRETURN if list was initially empty */ if (empty) { spin_unlock(&ino->i_lock); diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index a4c530e52149..2c2494225930 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -94,6 +94,9 @@ struct pnfs_layoutdriver_type { struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); void (*free_lseg) (struct pnfs_layout_segment *lseg); + void (*return_range) (struct pnfs_layout_hdr *lo, + struct pnfs_layout_range *range); + /* test for nfs page cache coalescing */ const struct nfs_pageio_ops *pg_read_ops; const struct nfs_pageio_ops *pg_write_ops; -- 2.30.2