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| author | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-08-31 12:05:47 +0300 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-08-31 12:05:47 +0300 |
| commit | 2d89a1d3c9ff8ceb115f001e66cff9788338ca47 (patch) | |
| tree | c9e05f049190c054640b7c49695deef9c5d3cf5a /fs/nfs | |
| parent | 21b874c873b5019db8bb4b4f6aa929c4bac0a398 (diff) | |
| download | linux-2d89a1d3c9ff8ceb115f001e66cff9788338ca47.tar.xz | |
NFSv4.1/pNFS: Don't request a minimal read layout beyond the end of file
If we have a read layout, then sanity check the minimal layout length
so that it does not extend beyond the end of file.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/pnfs.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index c4f918eca3d2..ba1246433794 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -868,6 +868,7 @@ send_layoutget(struct pnfs_layout_hdr *lo, struct nfs_server *server = NFS_SERVER(ino); struct nfs4_layoutget *lgp; struct pnfs_layout_segment *lseg; + loff_t i_size; dprintk("--> %s\n", __func__); @@ -875,9 +876,17 @@ send_layoutget(struct pnfs_layout_hdr *lo, if (lgp == NULL) return NULL; + i_size = i_size_read(ino); + lgp->args.minlength = PAGE_CACHE_SIZE; if (lgp->args.minlength > range->length) lgp->args.minlength = range->length; + if (range->iomode == IOMODE_READ) { + if (range->offset >= i_size) + lgp->args.minlength = 0; + else if (i_size - range->offset < lgp->args.minlength) + lgp->args.minlength = i_size - range->offset; + } lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; lgp->args.range = *range; lgp->args.type = server->pnfs_curr_ld->id; |