/* Check if the passed gid is available in supplied credential. */
int
groupmember(gid_t gid, const cred_t *cr)
{
struct group_info *gi;
int rc;
gi = cr->group_info;
rc = cr_groups_search(gi, SGID_TO_KGID(gid));
return (rc);
}
/*
* Update the embedded inode given the znode. We should work toward
* eliminating this function as soon as possible by removing values
* which are duplicated between the znode and inode. If the generic
* inode has the correct field it should be used, and the ZFS code
* updated to access the inode. This can be done incrementally.
*/
void
zfs_inode_update(znode_t *zp)
{
zfs_sb_t *zsb;
struct inode *ip;
uint32_t blksize;
uint64_t atime[2], mtime[2], ctime[2];
ASSERT(zp != NULL);
zsb = ZTOZSB(zp);
ip = ZTOI(zp);
/* Skip .zfs control nodes which do not exist on disk. */
if (zfsctl_is_node(ip))
return;
sa_lookup(zp->z_sa_hdl, SA_ZPL_ATIME(zsb), &atime, 16);
sa_lookup(zp->z_sa_hdl, SA_ZPL_MTIME(zsb), &mtime, 16);
sa_lookup(zp->z_sa_hdl, SA_ZPL_CTIME(zsb), &ctime, 16);
spin_lock(&ip->i_lock);
ip->i_generation = zp->z_gen;
ip->i_uid = SUID_TO_KUID(zp->z_uid);
ip->i_gid = SGID_TO_KGID(zp->z_gid);
set_nlink(ip, zp->z_links);
ip->i_mode = zp->z_mode;
zfs_set_inode_flags(zp, ip);
ip->i_blkbits = SPA_MINBLOCKSHIFT;
dmu_object_size_from_db(sa_get_db(zp->z_sa_hdl), &blksize,
(u_longlong_t *)&ip->i_blocks);
ZFS_TIME_DECODE(&ip->i_atime, atime);
ZFS_TIME_DECODE(&ip->i_mtime, mtime);
ZFS_TIME_DECODE(&ip->i_ctime, ctime);
i_size_write(ip, zp->z_size);
spin_unlock(&ip->i_lock);
}
/*
* Allocate a new inode with the passed id and ops.
*/
static struct inode *
zfsctl_inode_alloc(zfs_sb_t *zsb, uint64_t id,
const struct file_operations *fops, const struct inode_operations *ops)
{
struct timespec now = current_fs_time(zsb->z_sb);
struct inode *ip;
znode_t *zp;
ip = new_inode(zsb->z_sb);
if (ip == NULL)
return (NULL);
zp = ITOZ(ip);
ASSERT3P(zp->z_dirlocks, ==, NULL);
ASSERT3P(zp->z_acl_cached, ==, NULL);
ASSERT3P(zp->z_xattr_cached, ==, NULL);
zp->z_id = id;
zp->z_unlinked = 0;
zp->z_atime_dirty = 0;
zp->z_zn_prefetch = 0;
zp->z_moved = 0;
zp->z_sa_hdl = NULL;
zp->z_blksz = 0;
zp->z_seq = 0;
zp->z_mapcnt = 0;
zp->z_gen = 0;
zp->z_size = 0;
zp->z_atime[0] = 0;
zp->z_atime[1] = 0;
zp->z_links = 0;
zp->z_pflags = 0;
zp->z_uid = 0;
zp->z_gid = 0;
zp->z_mode = 0;
zp->z_sync_cnt = 0;
zp->z_is_zvol = B_FALSE;
zp->z_is_mapped = B_FALSE;
zp->z_is_ctldir = B_TRUE;
zp->z_is_sa = B_FALSE;
zp->z_is_stale = B_FALSE;
ip->i_ino = id;
ip->i_mode = (S_IFDIR | S_IRUGO | S_IXUGO);
ip->i_uid = SUID_TO_KUID(0);
ip->i_gid = SGID_TO_KGID(0);
ip->i_blkbits = SPA_MINBLOCKSHIFT;
ip->i_atime = now;
ip->i_mtime = now;
ip->i_ctime = now;
ip->i_fop = fops;
ip->i_op = ops;
if (insert_inode_locked(ip)) {
unlock_new_inode(ip);
iput(ip);
return (NULL);
}
mutex_enter(&zsb->z_znodes_lock);
list_insert_tail(&zsb->z_all_znodes, zp);
zsb->z_nr_znodes++;
membar_producer();
mutex_exit(&zsb->z_znodes_lock);
unlock_new_inode(ip);
return (ip);
}
