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FreeBSD: Parameterize ZFS_ENTER/ZFS_VERIFY_VP with an error code 

For legacy reasons, a couple of VOPs have to return error numbers that
don't come from the usual errno namespace.  To handle the cases where
ZFS_ENTER or ZFS_VERIFY_ZP fail, we need to be able to override the
default error return value of EIO.  Extend the macros to permit this.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Mark Johnston <markj@FreeBSD.org>
Closes #13311
This commit is contained in:
Mark Johnston 2022-04-07 17:11:00 -04:00 committed by Brian Behlendorf
parent ff23ef0c99
commit e9cd90f6e5
2 changed files with 19 additions and 15 deletions
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32
include/os/freebsd/zfs/sys/zfs_znode_impl.h
View File

@ -123,25 +123,29 @@ extern minor_t zfsdev_minor_alloc(void);
#define zn_rlimit_fsize(zp, uio) \
vn_rlimit_fsize(ZTOV(zp), GET_UIO_STRUCT(uio), zfs_uio_td(uio))
#define ZFS_ENTER_ERROR(zfsvfs, error) do { \
ZFS_TEARDOWN_ENTER_READ((zfsvfs), FTAG); \
if (__predict_false((zfsvfs)->z_unmounted)) { \
ZFS_TEARDOWN_EXIT_READ(zfsvfs, FTAG); \
return (error); \
} \
} while (0)
/* Called on entry to each ZFS vnode and vfs operation */
#define ZFS_ENTER(zfsvfs) \
{ \
ZFS_TEARDOWN_ENTER_READ((zfsvfs), FTAG); \
if (__predict_false((zfsvfs)->z_unmounted)) { \
ZFS_TEARDOWN_EXIT_READ(zfsvfs, FTAG); \
return (EIO); \
} \
}
#define ZFS_ENTER(zfsvfs) ZFS_ENTER_ERROR(zfsvfs, EIO)
/* Must be called before exiting the vop */
#define ZFS_EXIT(zfsvfs) ZFS_TEARDOWN_EXIT_READ(zfsvfs, FTAG)
#define ZFS_EXIT(zfsvfs) ZFS_TEARDOWN_EXIT_READ(zfsvfs, FTAG)
#define ZFS_VERIFY_ZP_ERROR(zp, error) do { \
if (__predict_false((zp)->z_sa_hdl == NULL)) { \
ZFS_EXIT((zp)->z_zfsvfs); \
return (error); \
} \
} while (0)
/* Verifies the znode is valid */
#define ZFS_VERIFY_ZP(zp) \
if (__predict_false((zp)->z_sa_hdl == NULL)) { \
ZFS_EXIT((zp)->z_zfsvfs); \
return (EIO); \
} \
#define ZFS_VERIFY_ZP(zp) ZFS_VERIFY_ZP_ERROR(zp, EIO)
/*
* Macros for dealing with dmu_buf_hold

2
module/os/freebsd/zfs/zfs_vnops_os.c
View File

@ -5434,7 +5434,7 @@ zfs_getextattr(struct vop_getextattr_args *ap)
error = ENOENT;
ZFS_ENTER(zfsvfs);
ZFS_VERIFY_ZP(zp)
ZFS_VERIFY_ZP(zp);
rw_enter(&zp->z_xattr_lock, RW_READER);
if (zfsvfs->z_use_sa && zp->z_is_sa)
error = zfs_getextattr_sa(ap, attrname);