diff options
Diffstat (limited to 'sys/kern/vfs_vnops.c')
| -rw-r--r-- | sys/kern/vfs_vnops.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sys/kern/vfs_vnops.c b/sys/kern/vfs_vnops.c index aa49d6f..e67e22e 100644 --- a/sys/kern/vfs_vnops.c +++ b/sys/kern/vfs_vnops.c @@ -476,8 +476,18 @@ vn_rdwr_inchunks(rw, vp, base, len, offset, segflg, ioflg, active_cred, int error = 0; do { - int chunk = (len > MAXBSIZE) ? MAXBSIZE : len; + int chunk; + /* + * Force `offset' to a multiple of MAXBSIZE except possibly + * for the first chunk, so that filesystems only need to + * write full blocks except possibly for the first and last + * chunks. + */ + chunk = MAXBSIZE - (uoff_t)offset % MAXBSIZE; + + if (chunk > len) + chunk = len; if (rw != UIO_READ && vp->v_type == VREG) bwillwrite(); error = vn_rdwr(rw, vp, base, chunk, offset, segflg, |
