static int sysfs_readdir(struct file *file, struct dir_context *ctx)
{
struct dentry *dentry = file->f_path.dentry;
struct sysfs_dirent *parent_sd = dentry->d_fsdata;
struct sysfs_dirent *pos = file->private_data;
enum kobj_ns_type type;
const void *ns;
type = sysfs_ns_type(parent_sd);
ns = sysfs_info(dentry->d_sb)->ns[type];
if (!dir_emit_dots(file, ctx))
return 0;
mutex_lock(&sysfs_mutex);
for (pos = sysfs_dir_pos(ns, parent_sd, ctx->pos, pos);
pos;
pos = sysfs_dir_next_pos(ns, parent_sd, ctx->pos, pos)) {
const char *name = pos->s_name;
unsigned int type = dt_type(pos);
int len = strlen(name);
ino_t ino = pos->s_ino;
ctx->pos = pos->s_hash;
file->private_data = sysfs_get(pos);
mutex_unlock(&sysfs_mutex);
if (!dir_emit(ctx, name, len, ino, type))
return 0;
mutex_lock(&sysfs_mutex);
}
mutex_unlock(&sysfs_mutex);
file->private_data = NULL;
ctx->pos = INT_MAX;
return 0;
}
static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
int over;
struct p9_fid *fid;
struct v9fs_session_info *v9ses;
struct inode *inode;
struct p9_stat *st;
P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name);
inode = filp->f_path.dentry->d_inode;
v9ses = v9fs_inode2v9ses(inode);
fid = filp->private_data;
while ((st = p9_client_dirread(fid, filp->f_pos)) != NULL) {
if (IS_ERR(st))
return PTR_ERR(st);
over = filldir(dirent, st->name.str, st->name.len, filp->f_pos,
v9fs_qid2ino(&st->qid), dt_type(st));
if (over)
break;
filp->f_pos += st->size;
kfree(st);
st = NULL;
}
kfree(st);
return 0;
}
static int v9fs_dir_readdir(struct file *file, struct dir_context *ctx)
{
bool over;
struct p9_wstat st;
int err = 0;
struct p9_fid *fid;
int buflen;
int reclen = 0;
struct p9_rdir *rdir;
struct kvec kvec;
p9_debug(P9_DEBUG_VFS, "name %pD\n", file);
fid = file->private_data;
buflen = fid->clnt->msize - P9_IOHDRSZ;
rdir = v9fs_alloc_rdir_buf(file, buflen);
if (!rdir)
return -ENOMEM;
kvec.iov_base = rdir->buf;
kvec.iov_len = buflen;
while (1) {
if (rdir->tail == rdir->head) {
struct iov_iter to;
int n;
iov_iter_kvec(&to, READ | ITER_KVEC, &kvec, 1, buflen);
n = p9_client_read(file->private_data, ctx->pos, &to,
&err);
if (err)
return err;
rdir->head = 0;
rdir->tail = n;
}
while (rdir->head < rdir->tail) {
p9stat_init(&st);
err = p9stat_read(fid->clnt, rdir->buf + rdir->head,
rdir->tail - rdir->head, &st);
if (err) {
p9_debug(P9_DEBUG_VFS, "returned %d\n", err);
p9stat_free(&st);
return -EIO;
}
reclen = st.size+2;
over = !dir_emit(ctx, st.name, strlen(st.name),
v9fs_qid2ino(&st.qid), dt_type(&st));
p9stat_free(&st);
if (over)
return 0;
rdir->head += reclen;
ctx->pos += reclen;
}
}
}
static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
int over;
struct p9_wstat st;
int err;
struct p9_fid *fid;
int buflen;
char *statbuf;
int n, i = 0;
P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name);
fid = filp->private_data;
buflen = fid->clnt->msize - P9_IOHDRSZ;
statbuf = kmalloc(buflen, GFP_KERNEL);
if (!statbuf)
return -ENOMEM;
while (1) {
err = v9fs_file_readn(filp, statbuf, NULL, buflen,
fid->rdir_fpos);
if (err <= 0)
break;
n = err;
while (i < n) {
err = p9stat_read(statbuf + i, buflen-i, &st,
fid->clnt->dotu);
if (err) {
P9_DPRINTK(P9_DEBUG_VFS, "returned %d\n", err);
err = -EIO;
p9stat_free(&st);
goto free_and_exit;
}
i += st.size+2;
fid->rdir_fpos += st.size+2;
over = filldir(dirent, st.name, strlen(st.name),
filp->f_pos, v9fs_qid2ino(&st.qid), dt_type(&st));
filp->f_pos += st.size+2;
p9stat_free(&st);
if (over) {
err = 0;
goto free_and_exit;
}
}
}
free_and_exit:
kfree(statbuf);
return err;
}
static int sysfs_readdir(struct file * filp, void * dirent, filldir_t filldir)
{
struct dentry *dentry = filp->f_path.dentry;
struct sysfs_dirent * parent_sd = dentry->d_fsdata;
struct sysfs_dirent *pos = filp->private_data;
ino_t ino;
if (filp->f_pos == 0) {
ino = parent_sd->s_ino;
if (filldir(dirent, ".", 1, filp->f_pos, ino, DT_DIR) == 0)
filp->f_pos++;
}
if (filp->f_pos == 1) {
if (parent_sd->s_parent)
ino = parent_sd->s_parent->s_ino;
else
ino = parent_sd->s_ino;
if (filldir(dirent, "..", 2, filp->f_pos, ino, DT_DIR) == 0)
filp->f_pos++;
}
mutex_lock(&sysfs_mutex);
for (pos = sysfs_dir_pos(parent_sd, filp->f_pos, pos);
pos;
pos = sysfs_dir_next_pos(parent_sd, filp->f_pos, pos)) {
const char * name;
unsigned int type;
int len, ret;
name = pos->s_name;
len = strlen(name);
ino = pos->s_ino;
type = dt_type(pos);
filp->f_pos = ino;
filp->private_data = sysfs_get(pos);
mutex_unlock(&sysfs_mutex);
ret = filldir(dirent, name, len, filp->f_pos, ino, type);
mutex_lock(&sysfs_mutex);
if (ret < 0)
break;
}
mutex_unlock(&sysfs_mutex);
if ((filp->f_pos > 1) && !pos) { /* EOF */
filp->f_pos = INT_MAX;
filp->private_data = NULL;
}
return 0;
}
static int kernfs_fop_readdir(struct file *file, struct dir_context *ctx)
{
struct dentry *dentry = file->f_path.dentry;
struct kernfs_node *parent = dentry->d_fsdata;
struct kernfs_node *pos = file->private_data;
const void *ns = NULL;
if (!dir_emit_dots(file, ctx))
return 0;
mutex_lock(&kernfs_mutex);
if (kernfs_ns_enabled(parent))
ns = kernfs_info(dentry->d_sb)->ns;
for (pos = kernfs_dir_pos(ns, parent, ctx->pos, pos);
pos;
pos = kernfs_dir_next_pos(ns, parent, ctx->pos, pos)) {
const char *name = pos->name;
unsigned int type = dt_type(pos);
int len = strlen(name);
ino_t ino = pos->ino;
ctx->pos = pos->hash;
file->private_data = pos;
kernfs_get(pos);
mutex_unlock(&kernfs_mutex);
if (!dir_emit(ctx, name, len, ino, type))
return 0;
mutex_lock(&kernfs_mutex);
}
mutex_unlock(&kernfs_mutex);
file->private_data = NULL;
ctx->pos = INT_MAX;
return 0;
}
static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
struct v9fs_fcall *fcall = NULL;
struct inode *inode = filp->f_path.dentry->d_inode;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
struct v9fs_fid *file = filp->private_data;
unsigned int i, n, s;
int fid = -1;
int ret = 0;
struct v9fs_stat stat;
int over = 0;
dprintk(DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name);
fid = file->fid;
if (file->rdir_fcall && (filp->f_pos != file->rdir_pos)) {
kfree(file->rdir_fcall);
file->rdir_fcall = NULL;
}
if (file->rdir_fcall) {
n = file->rdir_fcall->params.rread.count;
i = file->rdir_fpos;
while (i < n) {
s = v9fs_deserialize_stat(
file->rdir_fcall->params.rread.data + i,
n - i, &stat, v9ses->extended);
if (s == 0) {
dprintk(DEBUG_ERROR,
"error while deserializing stat\n");
ret = -EIO;
goto FreeStructs;
}
over = filldir(dirent, stat.name.str, stat.name.len,
filp->f_pos, v9fs_qid2ino(&stat.qid),
dt_type(&stat));
if (over) {
file->rdir_fpos = i;
file->rdir_pos = filp->f_pos;
break;
}
i += s;
filp->f_pos += s;
}
if (!over) {
kfree(file->rdir_fcall);
file->rdir_fcall = NULL;
}
}
while (!over) {
ret = v9fs_t_read(v9ses, fid, filp->f_pos,
v9ses->maxdata-V9FS_IOHDRSZ, &fcall);
if (ret < 0) {
dprintk(DEBUG_ERROR, "error while reading: %d: %p\n",
ret, fcall);
goto FreeStructs;
} else if (ret == 0)
break;
n = ret;
i = 0;
while (i < n) {
s = v9fs_deserialize_stat(fcall->params.rread.data + i,
n - i, &stat, v9ses->extended);
if (s == 0) {
dprintk(DEBUG_ERROR,
"error while deserializing stat\n");
return -EIO;
}
over = filldir(dirent, stat.name.str, stat.name.len,
filp->f_pos, v9fs_qid2ino(&stat.qid),
dt_type(&stat));
if (over) {
file->rdir_fcall = fcall;
file->rdir_fpos = i;
file->rdir_pos = filp->f_pos;
fcall = NULL;
break;
}
i += s;
filp->f_pos += s;
}
kfree(fcall);
}
FreeStructs:
kfree(fcall);
return ret;
}
static int sysfs_readdir(struct file * filp, void * dirent, filldir_t filldir)
{
struct dentry *dentry = filp->f_path.dentry;
struct sysfs_dirent * parent_sd = dentry->d_fsdata;
struct sysfs_dirent *cursor = filp->private_data;
struct sysfs_dirent **pos;
ino_t ino;
int i = filp->f_pos;
switch (i) {
case 0:
ino = parent_sd->s_ino;
if (filldir(dirent, ".", 1, i, ino, DT_DIR) < 0)
break;
filp->f_pos++;
i++;
/* fallthrough */
case 1:
if (parent_sd->s_parent)
ino = parent_sd->s_parent->s_ino;
else
ino = parent_sd->s_ino;
if (filldir(dirent, "..", 2, i, ino, DT_DIR) < 0)
break;
filp->f_pos++;
i++;
/* fallthrough */
default:
mutex_lock(&sysfs_mutex);
pos = &parent_sd->s_children;
while (*pos != cursor)
pos = &(*pos)->s_sibling;
/* unlink cursor */
*pos = cursor->s_sibling;
if (filp->f_pos == 2)
pos = &parent_sd->s_children;
for ( ; *pos; pos = &(*pos)->s_sibling) {
struct sysfs_dirent *next = *pos;
const char * name;
int len;
if (!sysfs_type(next))
continue;
name = next->s_name;
len = strlen(name);
ino = next->s_ino;
if (filldir(dirent, name, len, filp->f_pos, ino,
dt_type(next)) < 0)
break;
filp->f_pos++;
}
/* put cursor back in */
cursor->s_sibling = *pos;
*pos = cursor;
mutex_unlock(&sysfs_mutex);
}
return 0;
}
static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
int over;
struct p9_wstat st;
int err = 0;
struct p9_fid *fid;
int buflen;
int reclen = 0;
struct p9_rdir *rdir;
P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name);
fid = filp->private_data;
buflen = fid->clnt->msize - P9_IOHDRSZ;
err = v9fs_alloc_rdir_buf(filp, buflen);
if (err)
goto exit;
rdir = (struct p9_rdir *) fid->rdir;
err = mutex_lock_interruptible(&rdir->mutex);
if (err)
return err;
while (err == 0) {
if (rdir->tail == rdir->head) {
err = v9fs_file_readn(filp, rdir->buf, NULL,
buflen, filp->f_pos);
if (err <= 0)
goto unlock_and_exit;
rdir->head = 0;
rdir->tail = err;
}
while (rdir->head < rdir->tail) {
p9stat_init(&st);
err = p9stat_read(rdir->buf + rdir->head,
rdir->tail - rdir->head, &st,
fid->clnt->proto_version);
if (err) {
P9_DPRINTK(P9_DEBUG_VFS, "returned %d\n", err);
err = -EIO;
p9stat_free(&st);
goto unlock_and_exit;
}
reclen = st.size+2;
over = filldir(dirent, st.name, strlen(st.name),
filp->f_pos, v9fs_qid2ino(&st.qid), dt_type(&st));
p9stat_free(&st);
if (over) {
err = 0;
goto unlock_and_exit;
}
rdir->head += reclen;
filp->f_pos += reclen;
}
}
unlock_and_exit:
mutex_unlock(&rdir->mutex);
exit:
return err;
}
static int oprofilefs_readdir(struct file * filp, void * dirent,
filldir_t filldir)
{
struct dentry *dentry = filp->f_dentry;
struct dentry *cursor = filp->private_data;
struct list_head *p, *q = &cursor->d_child;
ino_t ino;
int i = filp->f_pos;
switch (i) {
case 0:
ino = dentry->d_inode->i_ino;
if (filldir(dirent, ".", 1, i, ino, DT_DIR) < 0)
break;
filp->f_pos++;
i++;
/* fallthrough */
case 1:
if (filldir(dirent, "..", 2, i,
dentry->d_parent->d_inode->i_ino,
DT_DIR) < 0)
break;
filp->f_pos++;
i++;
/* fallthrough */
default:
spin_lock(&dcache_lock);
if (filp->f_pos == 2) {
list_del(q);
list_add(q, &dentry->d_subdirs);
}
for (p=q->next; p != &dentry->d_subdirs; p=p->next) {
struct dentry *next;
next = list_entry(p, struct dentry, d_child);
if (list_empty(&next->d_hash) || !next->d_inode)
continue;
spin_unlock(&dcache_lock);
if (filldir(dirent, next->d_name.name, next->d_name.len, filp->f_pos, next->d_inode->i_ino, dt_type(next->d_inode)) < 0)
return 0;
spin_lock(&dcache_lock);
/* next is still alive */
list_del(q);
list_add(q, p);
p = q;
filp->f_pos++;
}
spin_unlock(&dcache_lock);
}
return 0;
}
