static int
tmpfs_readdir(struct vop_readdir_args *v)
{
struct vnode *vp = v->a_vp;
struct uio *uio = v->a_uio;
int *eofflag = v->a_eofflag;
u_long **cookies = v->a_cookies;
int *ncookies = v->a_ncookies;
int error;
ssize_t startresid;
int maxcookies;
struct tmpfs_node *node;
/* This operation only makes sense on directory nodes. */
if (vp->v_type != VDIR)
return ENOTDIR;
maxcookies = 0;
node = VP_TO_TMPFS_DIR(vp);
startresid = uio->uio_resid;
/* Allocate cookies for NFS and compat modules. */
if (cookies != NULL && ncookies != NULL) {
maxcookies = howmany(node->tn_size,
sizeof(struct tmpfs_dirent)) + 2;
*cookies = malloc(maxcookies * sizeof(**cookies), M_TEMP,
M_WAITOK);
*ncookies = 0;
}
if (cookies == NULL)
error = tmpfs_dir_getdents(node, uio, 0, NULL, NULL);
else
error = tmpfs_dir_getdents(node, uio, maxcookies, *cookies,
ncookies);
/* Buffer was filled without hitting EOF. */
if (error == EJUSTRETURN)
error = (uio->uio_resid != startresid) ? 0 : EINVAL;
if (error != 0 && cookies != NULL && ncookies != NULL) {
free(*cookies, M_TEMP);
*cookies = NULL;
*ncookies = 0;
}
if (eofflag != NULL)
*eofflag =
(error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF);
return error;
}
static int
tmpfs_readdir(struct vop_readdir_args *v)
{
struct vnode *vp = v->a_vp;
struct uio *uio = v->a_uio;
int *eofflag = v->a_eofflag;
u_long **cookies = v->a_cookies;
int *ncookies = v->a_ncookies;
int error;
ssize_t startresid;
int cnt = 0;
struct tmpfs_node *node;
/* This operation only makes sense on directory nodes. */
if (vp->v_type != VDIR)
return ENOTDIR;
node = VP_TO_TMPFS_DIR(vp);
startresid = uio->uio_resid;
if (cookies != NULL && ncookies != NULL) {
cnt = howmany(node->tn_size, sizeof(struct tmpfs_dirent)) + 2;
*cookies = malloc(cnt * sizeof(**cookies), M_TEMP, M_WAITOK);
*ncookies = 0;
}
if (cnt == 0)
error = tmpfs_dir_getdents(node, uio, 0, NULL, NULL);
else
error = tmpfs_dir_getdents(node, uio, cnt, *cookies, ncookies);
if (error == EJUSTRETURN)
error = (uio->uio_resid != startresid) ? 0 : EINVAL;
if (error != 0 && cnt != 0)
free(*cookies, M_TEMP);
if (eofflag != NULL)
*eofflag =
(error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF);
return error;
}
static int
tmpfs_readdir(struct vop_readdir_args *v)
{
struct vnode *vp = v->a_vp;
struct uio *uio = v->a_uio;
int *eofflag = v->a_eofflag;
off_t **cookies = v->a_cookies;
int *ncookies = v->a_ncookies;
struct tmpfs_mount *tmp;
int error;
off_t startoff;
off_t cnt = 0;
struct tmpfs_node *node;
/* This operation only makes sense on directory nodes. */
if (vp->v_type != VDIR) {
return ENOTDIR;
}
tmp = VFS_TO_TMPFS(vp->v_mount);
node = VP_TO_TMPFS_DIR(vp);
startoff = uio->uio_offset;
if (uio->uio_offset == TMPFS_DIRCOOKIE_DOT) {
error = tmpfs_dir_getdotdent(node, uio);
if (error != 0) {
TMPFS_NODE_LOCK_SH(node);
goto outok;
}
cnt++;
}
if (uio->uio_offset == TMPFS_DIRCOOKIE_DOTDOT) {
/* may lock parent, cannot hold node lock */
error = tmpfs_dir_getdotdotdent(tmp, node, uio);
if (error != 0) {
TMPFS_NODE_LOCK_SH(node);
goto outok;
}
cnt++;
}
TMPFS_NODE_LOCK_SH(node);
error = tmpfs_dir_getdents(node, uio, &cnt);
outok:
KKASSERT(error >= -1);
if (error == -1)
error = 0;
if (eofflag != NULL)
*eofflag =
(error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF);
/* Update NFS-related variables. */
if (error == 0 && cookies != NULL && ncookies != NULL) {
off_t i;
off_t off = startoff;
struct tmpfs_dirent *de = NULL;
*ncookies = cnt;
*cookies = kmalloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK);
for (i = 0; i < cnt; i++) {
KKASSERT(off != TMPFS_DIRCOOKIE_EOF);
if (off == TMPFS_DIRCOOKIE_DOT) {
off = TMPFS_DIRCOOKIE_DOTDOT;
} else {
if (off == TMPFS_DIRCOOKIE_DOTDOT) {
de = RB_MIN(tmpfs_dirtree_cookie,
&node->tn_dir.tn_cookietree);
} else if (de != NULL) {
de = RB_NEXT(tmpfs_dirtree_cookie,
&node->tn_dir.tn_cookietree, de);
} else {
de = tmpfs_dir_lookupbycookie(node,
off);
KKASSERT(de != NULL);
de = RB_NEXT(tmpfs_dirtree_cookie,
&node->tn_dir.tn_cookietree, de);
}
if (de == NULL)
off = TMPFS_DIRCOOKIE_EOF;
else
off = tmpfs_dircookie(de);
}
(*cookies)[i] = off;
}
KKASSERT(uio->uio_offset == off);
}
TMPFS_NODE_UNLOCK(node);
if ((node->tn_status & TMPFS_NODE_ACCESSED) == 0) {
TMPFS_NODE_LOCK(node);
node->tn_status |= TMPFS_NODE_ACCESSED;
TMPFS_NODE_UNLOCK(node);
}
return error;
}
static int
tmpfs_readdir(struct vop_readdir_args *v)
{
struct vnode *vp = v->a_vp;
struct uio *uio = v->a_uio;
int *eofflag = v->a_eofflag;
u_long **cookies = v->a_cookies;
int *ncookies = v->a_ncookies;
int error;
off_t startoff;
off_t cnt = 0;
struct tmpfs_node *node;
/* This operation only makes sense on directory nodes. */
if (vp->v_type != VDIR)
return ENOTDIR;
node = VP_TO_TMPFS_DIR(vp);
startoff = uio->uio_offset;
if (uio->uio_offset == TMPFS_DIRCOOKIE_DOT) {
error = tmpfs_dir_getdotdent(node, uio);
if (error != 0)
goto outok;
cnt++;
}
if (uio->uio_offset == TMPFS_DIRCOOKIE_DOTDOT) {
error = tmpfs_dir_getdotdotdent(node, uio);
if (error != 0)
goto outok;
cnt++;
}
error = tmpfs_dir_getdents(node, uio, &cnt);
outok:
MPASS(error >= -1);
if (error == -1)
error = (cnt != 0) ? 0 : EINVAL;
if (eofflag != NULL)
*eofflag =
(error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF);
/* Update NFS-related variables. */
if (error == 0 && cookies != NULL && ncookies != NULL) {
off_t i;
off_t off = startoff;
struct tmpfs_dirent *de = NULL;
*ncookies = cnt;
*cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK);
for (i = 0; i < cnt; i++) {
MPASS(off != TMPFS_DIRCOOKIE_EOF);
if (off == TMPFS_DIRCOOKIE_DOT) {
off = TMPFS_DIRCOOKIE_DOTDOT;
} else {
if (off == TMPFS_DIRCOOKIE_DOTDOT) {
de = TAILQ_FIRST(&node->tn_dir.tn_dirhead);
} else if (de != NULL) {
de = TAILQ_NEXT(de, td_entries);
} else {
de = tmpfs_dir_lookupbycookie(node,
off);
MPASS(de != NULL);
de = TAILQ_NEXT(de, td_entries);
}
if (de == NULL)
off = TMPFS_DIRCOOKIE_EOF;
else
off = tmpfs_dircookie(de);
}
(*cookies)[i] = off;
}
MPASS(uio->uio_offset == off);
}
return error;
}
