zfs-patches/0033-Correctly-handle-errors-from-kern_path.patch

   1 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
   2 From: Chris Siebenmann <cks.github@cs.toronto.edu>
   3 Date: Wed, 5 Sep 2018 01:26:56 -0400
   4 Subject: [PATCH] Correctly handle errors from kern_path
   5
   6 As a regular kernel function, kern_path() returns errors as negative
   7 errnos, such as -ELOOP. zfsctl_snapdir_vget() must convert these into
   8 the positive errnos used throughout the ZFS code when it returns them
   9 to other ZFS functions so that the ZFS code properly sees them as
  10 errors.
  11
  12 Reviewed-by: George Melikov <mail@gmelikov.ru>
  13 Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
  14 Signed-off-by: Chris Siebenmann <cks.git01@cs.toronto.edu>
  15 Closes #7764
  16 Closes #7864
  17
  18 Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
  19 ---
  20  module/zfs/zfs_ctldir.c | 2 +-
  21  1 file changed, 1 insertion(+), 1 deletion(-)
  22
  23 diff --git a/module/zfs/zfs_ctldir.c b/module/zfs/zfs_ctldir.c
  24 index 25edea78..0ab5b4f0 100644
  25 --- a/module/zfs/zfs_ctldir.c
  26 +++ b/module/zfs/zfs_ctldir.c
  27 @@ -1180,7 +1180,7 @@ zfsctl_snapdir_vget(struct super_block *sb, uint64_t objsetid, int gen,
  28                 goto out;
  29
  30         /* Trigger automount */
  31 -       error = kern_path(mnt, LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &path);
  32 +       error = -kern_path(mnt, LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &path);
  33         if (error)
  34                 goto out;
  35