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Correctly handle errors from kern_path 

As a regular kernel function, kern_path() returns errors as negative
errnos, such as -ELOOP. zfsctl_snapdir_vget() must convert these into
the positive errnos used throughout the ZFS code when it returns them
to other ZFS functions so that the ZFS code properly sees them as
errors.

Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chris Siebenmann <cks.git01@cs.toronto.edu>
Closes #7764
Closes #7864
This commit is contained in:
Chris Siebenmann 2018-09-05 01:26:56 -04:00 committed by Brian Behlendorf
parent 0405eeea6a
commit cfa37548eb
1 changed files with 1 additions and 1 deletions
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2
module/zfs/zfs_ctldir.c
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@ -1177,7 +1177,7 @@ zfsctl_snapdir_vget(struct super_block *sb, uint64_t objsetid, int gen,
goto out; goto out;
/* Trigger automount */ /* Trigger automount */
error = kern_path(mnt, LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &path); error = -kern_path(mnt, LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &path);
if (error) if (error)
goto out; goto out;