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Fix ZFS_READONLY implementation on Linux (#121) 

MS-FSCC 2.6 is the governing document for
DOS attribute behavior. It specifies the following:

For a file, applications can read the file but
cannot write to it or delete it. For a directory,
applications cannot delete it, but applications can
create and delete files from the directory.

Signed-off-by: Andrew Walker <awalker@ixsystems.com>
This commit is contained in:
Andrew Walker 2023-01-31 11:37:09 -08:00 committed by Ameer Hamza
parent 2df4032585
commit 815f61fda7
2 changed files with 2 additions and 5 deletions
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2
module/os/linux/zfs/zfs_acl.c
View File

@ -2620,7 +2620,7 @@ zfs_zaccess_common(znode_t *zp, uint32_t v4_mode, uint32_t *working_mode,
* Also note: DOS R/O is ignored for directories.
*/
if ((v4_mode & WRITE_MASK_DATA) &&
S_ISDIR(ZTOI(zp)->i_mode) &&
!S_ISDIR(ZTOI(zp)->i_mode) &&
(zp->z_pflags & ZFS_READONLY)) {
return (SET_ERROR(EPERM));
}

5
module/os/linux/zfs/zfs_vnops_os.c
View File

@ -1998,10 +1998,7 @@ zfs_setattr(znode_t *zp, vattr_t *vap, int flags, cred_t *cr, zidmap_t *mnt_ns)
goto out3;
}
if ((mask & ATTR_SIZE) && (zp->z_pflags & ZFS_READONLY)) {
err = SET_ERROR(EPERM);
goto out3;
}
/* ZFS_READONLY will be handled in zfs_zaccess() */
/*
* Verify timestamps doesn't overflow 32 bits.