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authorChristoph Hellwig <hch@lst.de>2014-09-10 08:23:31 -0700
committerTrond Myklebust <trond.myklebust@primarydata.com>2014-09-10 12:47:03 -0700
commitc88953d87f5c8cd95bebcbd6d15f2f0cdd348136 (patch)
tree6805b3c8feb934404205d5e79a2cf37dde87647f /fs/nfs
parent612aa983a041056c3368aacfdc9febd406d245a8 (diff)
downloadlinux-c88953d87f5c8cd95bebcbd6d15f2f0cdd348136.tar.bz2
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 <hch@lst.de> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/callback_proc.c12
-rw-r--r--fs/nfs/pnfs.c10
-rw-r--r--fs/nfs/pnfs.h3
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;