diff options
Diffstat (limited to 'fs/nfs/pnfs.c')
| -rw-r--r-- | fs/nfs/pnfs.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 4755858e37a0..cb53d450ae32 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -662,7 +662,18 @@ pnfs_destroy_all_layouts(struct nfs_client *clp) */ static bool pnfs_seqid_is_newer(u32 s1, u32 s2) { - return (s32)s1 - (s32)s2 > 0; + return (s32)(s1 - s2) > 0; +} + +static void +pnfs_verify_layout_stateid(struct pnfs_layout_hdr *lo, + const nfs4_stateid *new, + struct list_head *free_me_list) +{ + if (nfs4_stateid_match_other(&lo->plh_stateid, new)) + return; + /* Layout is new! Kill existing layout segments */ + pnfs_mark_matching_lsegs_invalid(lo, free_me_list, NULL); } /* update lo->plh_stateid with new if is more recent */ @@ -1315,6 +1326,7 @@ pnfs_layout_process(struct nfs4_layoutget *lgp) struct nfs4_layoutget_res *res = &lgp->res; struct pnfs_layout_segment *lseg; struct inode *ino = lo->plh_inode; + LIST_HEAD(free_me); int status = 0; /* Inject layout blob into I/O device driver */ @@ -1341,6 +1353,8 @@ pnfs_layout_process(struct nfs4_layoutget *lgp) goto out_forget_reply; } + /* Check that the new stateid matches the old stateid */ + pnfs_verify_layout_stateid(lo, &res->stateid, &free_me); /* Done processing layoutget. Set the layout stateid */ pnfs_set_layout_stateid(lo, &res->stateid, false); @@ -1355,6 +1369,7 @@ pnfs_layout_process(struct nfs4_layoutget *lgp) } spin_unlock(&ino->i_lock); + pnfs_free_lseg_list(&free_me); return lseg; out: return ERR_PTR(status); |