[PATCH v4 08/10] cifsd: add file operations

Namjae Jeon
2021-06-02T03:59:11Z

This adds file operations and buffer pool.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Acked-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
---
fs/cifsd/buffer_pool.c | 265 ++++++
fs/cifsd/buffer_pool.h | 17 +
fs/cifsd/vfs.c | 2015 ++++++++++++++++++++++++++++++++++++++++
fs/cifsd/vfs.h | 275 ++++++
fs/cifsd/vfs_cache.c | 685 ++++++++++++++
fs/cifsd/vfs_cache.h | 185 ++++
6 files changed, 3442 insertions(+)
create mode 100644 fs/cifsd/buffer_pool.c
create mode 100644 fs/cifsd/buffer_pool.h
create mode 100644 fs/cifsd/vfs.c
create mode 100644 fs/cifsd/vfs.h
create mode 100644 fs/cifsd/vfs_cache.c
create mode 100644 fs/cifsd/vfs_cache.h

diff --git a/fs/cifsd/buffer_pool.c b/fs/cifsd/buffer_pool.c
new file mode 100644
index 000000000000..ea7d2d1a056a
--- /dev/null
+++ b/fs/cifsd/buffer_pool.c
@@ -0,0 +1,265 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2018 Samsung Electronics Co., Ltd.
+ */
+
+#include <linux/kernel.h>
+#include <linux/wait.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/rwlock.h>
+
+#include "glob.h"
+#include "buffer_pool.h"
+#include "connection.h"
+#include "mgmt/ksmbd_ida.h"
+
+static struct kmem_cache *filp_cache;
+
+struct wm {
+ struct list_head list;
+ unsigned int sz;
+ char buffer[0];
+};
+
+struct wm_list {
+ struct list_head list;
+ unsigned int sz;
+
+ spinlock_t wm_lock;
+ int avail_wm;
+ struct list_head idle_wm;
+ wait_queue_head_t wm_wait;
+};
+
+static LIST_HEAD(wm_lists);
+static DEFINE_RWLOCK(wm_lists_lock);
+
+static struct wm *wm_alloc(size_t sz, gfp_t flags)
+{
+ struct wm *wm;
+ size_t alloc_sz = sz + sizeof(struct wm);
+
+ if (sz > SIZE_MAX - sizeof(struct wm))
+ return NULL;
+
+ wm = kvmalloc(alloc_sz, flags);
+ if (!wm)
+ return NULL;
+ wm->sz = sz;
+ return wm;
+}
+
+static int register_wm_size_class(size_t sz)
+{
+ struct wm_list *l, *nl;
+
+ nl = kmalloc(sizeof(struct wm_list), GFP_KERNEL);
+ if (!nl)
+ return -ENOMEM;
+
+ nl->sz = sz;
+ spin_lock_init(&nl->wm_lock);
+ INIT_LIST_HEAD(&nl->idle_wm);
+ INIT_LIST_HEAD(&nl->list);
+ init_waitqueue_head(&nl->wm_wait);
+ nl->avail_wm = 0;
+
+ write_lock(&wm_lists_lock);
+ list_for_each_entry(l, &wm_lists, list) {
+ if (l->sz == sz) {
+ write_unlock(&wm_lists_lock);
+ kfree(nl);
+ return 0;
+ }
+ }
+
+ list_add(&nl->list, &wm_lists);
+ write_unlock(&wm_lists_lock);
+ return 0;
+}
+
+static struct wm_list *match_wm_list(size_t size)
+{
+ struct wm_list *l, *rl = NULL;
+
+ read_lock(&wm_lists_lock);
+ list_for_each_entry(l, &wm_lists, list) {
+ if (l->sz == size) {
+ rl = l;
+ break;
+ }
+ }
+ read_unlock(&wm_lists_lock);
+ return rl;
+}
+
+static struct wm *find_wm(size_t size)
+{
+ struct wm_list *wm_list;
+ struct wm *wm;
+
+ wm_list = match_wm_list(size);
+ if (!wm_list) {
+ if (register_wm_size_class(size))
+ return NULL;
+ wm_list = match_wm_list(size);
+ }
+
+ if (!wm_list)
+ return NULL;
+
+ while (1) {
+ spin_lock(&wm_list->wm_lock);
+ if (!list_empty(&wm_list->idle_wm)) {
+ wm = list_entry(wm_list->idle_wm.next,
+ struct wm,
+ list);
+ list_del(&wm->list);
+ spin_unlock(&wm_list->wm_lock);
+ return wm;
+ }
+
+ if (wm_list->avail_wm > num_online_cpus()) {
+ spin_unlock(&wm_list->wm_lock);
+ wait_event(wm_list->wm_wait,
+ !list_empty(&wm_list->idle_wm));
+ continue;
+ }
+
+ wm_list->avail_wm++;
+ spin_unlock(&wm_list->wm_lock);
+
+ wm = wm_alloc(size, GFP_KERNEL);
+ if (!wm) {
+ spin_lock(&wm_list->wm_lock);
+ wm_list->avail_wm--;
+ spin_unlock(&wm_list->wm_lock);
+ wait_event(wm_list->wm_wait,
+ !list_empty(&wm_list->idle_wm));
+ continue;
+ }
+ break;
+ }
+
+ return wm;
+}
+
+static void release_wm(struct wm *wm, struct wm_list *wm_list)
+{
+ if (!wm)
+ return;
+
+ spin_lock(&wm_list->wm_lock);
+ if (wm_list->avail_wm <= num_online_cpus()) {
+ list_add(&wm->list, &wm_list->idle_wm);
+ spin_unlock(&wm_list->wm_lock);
+ wake_up(&wm_list->wm_wait);
+ return;
+ }
+
+ wm_list->avail_wm--;
+ spin_unlock(&wm_list->wm_lock);
+ kvfree(wm);
+}
+
+static void wm_list_free(struct wm_list *l)
+{
+ struct wm *wm;
+
+ while (!list_empty(&l->idle_wm)) {
+ wm = list_entry(l->idle_wm.next, struct wm, list);
+ list_del(&wm->list);
+ kvfree(wm);
+ }
+ kfree(l);
+}
+
+static void wm_lists_destroy(void)
+{
+ struct wm_list *l;
+
+ while (!list_empty(&wm_lists)) {
+ l = list_entry(wm_lists.next, struct wm_list, list);
+ list_del(&l->list);
+ wm_list_free(l);
+ }
+}
+
+void *ksmbd_find_buffer(size_t size)
+{
+ struct wm *wm;
+
+ wm = find_wm(size);
+
+ WARN_ON(!wm);
+ if (wm)
+ return wm->buffer;
+ return NULL;
+}
+
+void ksmbd_release_buffer(void *buffer)
+{
+ struct wm_list *wm_list;
+ struct wm *wm;
+
+ if (!buffer)
+ return;
+
+ wm = container_of(buffer, struct wm, buffer);
+ wm_list = match_wm_list(wm->sz);
+ WARN_ON(!wm_list);
+ if (wm_list)
+ release_wm(wm, wm_list);
+}
+
+void *ksmbd_realloc_response(void *ptr, size_t old_sz, size_t new_sz)
+{
+ size_t sz = min(old_sz, new_sz);
+ void *nptr;
+
+ nptr = kvmalloc(new_sz, GFP_KERNEL | __GFP_ZERO);
+ if (!nptr)
+ return ptr;
+ memcpy(nptr, ptr, sz);
+ kvfree(ptr);
+ return nptr;
+}
+
+void ksmbd_free_file_struct(void *filp)
+{
+ kmem_cache_free(filp_cache, filp);
+}
+
+void *ksmbd_alloc_file_struct(void)
+{
+ return kmem_cache_zalloc(filp_cache, GFP_KERNEL);
+}
+
+void ksmbd_destroy_buffer_pools(void)
+{
+ wm_lists_destroy();
+ ksmbd_work_pool_destroy();
+ kmem_cache_destroy(filp_cache);
+}
+
+int ksmbd_init_buffer_pools(void)
+{
+ if (ksmbd_work_pool_init())
+ goto out;
+
+ filp_cache = kmem_cache_create("ksmbd_file_cache",
+ sizeof(struct ksmbd_file), 0,
+ SLAB_HWCACHE_ALIGN, NULL);
+ if (!filp_cache)
+ goto out;
+
+ return 0;
+
+out:
+ ksmbd_err("failed to allocate memory\n");
+ ksmbd_destroy_buffer_pools();
+ return -ENOMEM;
+}
diff --git a/fs/cifsd/buffer_pool.h b/fs/cifsd/buffer_pool.h
new file mode 100644
index 000000000000..088aa07ba09b
--- /dev/null
+++ b/fs/cifsd/buffer_pool.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2018 Samsung Electronics Co., Ltd.
+ */
+
+#ifndef __KSMBD_BUFFER_POOL_H__
+#define __KSMBD_BUFFER_POOL_H__
+
+void *ksmbd_find_buffer(size_t size);
+void ksmbd_release_buffer(void *buffer);
+void *ksmbd_realloc_response(void *ptr, size_t old_sz, size_t new_sz);
+void ksmbd_free_file_struct(void *filp);
+void *ksmbd_alloc_file_struct(void);
+void ksmbd_destroy_buffer_pools(void);
+int ksmbd_init_buffer_pools(void);
+
+#endif /* __KSMBD_BUFFER_POOL_H__ */
diff --git a/fs/cifsd/vfs.c b/fs/cifsd/vfs.c
new file mode 100644
index 000000000000..9111b485d611
--- /dev/null
+++ b/fs/cifsd/vfs.c
@@ -0,0 +1,2015 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
+ * Copyright (C) 2018 Samsung Electronics Co., Ltd.
+ */
+
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/uaccess.h>
+#include <linux/backing-dev.h>
+#include <linux/writeback.h>
+#include <linux/xattr.h>
+#include <linux/falloc.h>
+#include <linux/genhd.h>
+#include <linux/blkdev.h>
+#include <linux/fsnotify.h>
+#include <linux/dcache.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/sched/xacct.h>
+#include <linux/crc32c.h>
+
+#include "glob.h"
+#include "oplock.h"
+#include "connection.h"
+#include "buffer_pool.h"
+#include "vfs.h"
+#include "vfs_cache.h"
+#include "smbacl.h"
+#include "ndr.h"
+#include "auth.h"
+#include "misc.h"
+
+#include "smb_common.h"
+#include "mgmt/share_config.h"
+#include "mgmt/tree_connect.h"
+#include "mgmt/user_session.h"
+#include "mgmt/user_config.h"
+
+static char *extract_last_component(char *path)
+{
+ char *p = strrchr(path, '/');
+
+ if (p && p[1] != '\0') {
+ *p = '\0';
+ p++;
+ } else {
+ p = NULL;
+ ksmbd_err("Invalid path %s\n", path);
+ }
+ return p;
+}
+
+static void ksmbd_vfs_inherit_owner(struct ksmbd_work *work,
+ struct inode *parent_inode,
+ struct inode *inode)
+{
+ if (!test_share_config_flag(work->tcon->share_conf,
+ KSMBD_SHARE_FLAG_INHERIT_OWNER))
+ return;
+
+ i_uid_write(inode, i_uid_read(parent_inode));
+}
+
+int ksmbd_vfs_inode_permission(struct dentry *dentry, int acc_mode, bool delete)
+{
+ int mask, ret = 0;
+
+ mask = 0;
+ acc_mode &= O_ACCMODE;
+
+ if (acc_mode == O_RDONLY)
+ mask = MAY_READ;
+ else if (acc_mode == O_WRONLY)
+ mask = MAY_WRITE;
+ else if (acc_mode == O_RDWR)
+ mask = MAY_READ | MAY_WRITE;
+
+ if (inode_permission(&init_user_ns, d_inode(dentry), mask | MAY_OPEN))
+ return -EACCES;
+
+ if (delete) {
+ struct dentry *child, *parent;
+
+ parent = dget_parent(dentry);
+ inode_lock_nested(d_inode(parent), I_MUTEX_PARENT);
+ child = lookup_one_len(dentry->d_name.name, parent,
+ dentry->d_name.len);
+ if (IS_ERR(child)) {
+ ret = PTR_ERR(child);
+ goto out_lock;
+ }
+
+ if (child != dentry) {
+ ret = -ESTALE;
+ dput(child);
+ goto out_lock;
+ }
+ dput(child);
+
+ if (inode_permission(&init_user_ns, d_inode(parent), MAY_EXEC | MAY_WRITE)) {
+ ret = -EACCES;
+ goto out_lock;
+ }
+out_lock:
+ inode_unlock(d_inode(parent));
+ dput(parent);
+ }
+ return ret;
+}
+
+int ksmbd_vfs_query_maximal_access(struct dentry *dentry, __le32 *daccess)
+{
+ struct dentry *parent, *child;
+ int ret = 0;
+
+ *daccess = cpu_to_le32(FILE_READ_ATTRIBUTES | READ_CONTROL);
+
+ if (!inode_permission(&init_user_ns, d_inode(dentry), MAY_OPEN | MAY_WRITE))
+ *daccess |= cpu_to_le32(WRITE_DAC | WRITE_OWNER | SYNCHRONIZE |
+ FILE_WRITE_DATA | FILE_APPEND_DATA |
+ FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES |
+ FILE_DELETE_CHILD);
+
+ if (!inode_permission(&init_user_ns, d_inode(dentry), MAY_OPEN | MAY_READ))
+ *daccess |= FILE_READ_DATA_LE | FILE_READ_EA_LE;
+
+ if (!inode_permission(&init_user_ns, d_inode(dentry), MAY_OPEN | MAY_EXEC))
+ *daccess |= FILE_EXECUTE_LE;
+
+ parent = dget_parent(dentry);
+ inode_lock_nested(d_inode(parent), I_MUTEX_PARENT);
+ child = lookup_one_len(dentry->d_name.name, parent,
+ dentry->d_name.len);
+ if (IS_ERR(child)) {
+ ret = PTR_ERR(child);
+ goto out_lock;
+ }
+
+ if (child != dentry) {
+ ret = -ESTALE;
+ dput(child);
+ goto out_lock;
+ }
+ dput(child);
+
+ if (!inode_permission(&init_user_ns, d_inode(parent), MAY_EXEC | MAY_WRITE))
+ *daccess |= FILE_DELETE_LE;
+
+out_lock:
+ inode_unlock(d_inode(parent));
+ dput(parent);
+ return ret;
+}
+
+/**
+ * ksmbd_vfs_create() - vfs helper for smb create file
+ * @work: work
+ * @name: file name
+ * @mode: file create mode
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_create(struct ksmbd_work *work, const char *name, umode_t mode)
+{
+ struct path path;
+ struct dentry *dentry;
+ int err;
+
+ dentry = kern_path_create(AT_FDCWD, name, &path, 0);
+ if (IS_ERR(dentry)) {
+ err = PTR_ERR(dentry);
+ if (err != -ENOENT)
+ ksmbd_err("path create failed for %s, err %d\n",
+ name, err);
+ return err;
+ }
+
+ mode |= S_IFREG;
+ err = vfs_create(&init_user_ns, d_inode(path.dentry), dentry, mode, true);
+ if (!err) {
+ ksmbd_vfs_inherit_owner(work, d_inode(path.dentry),
+ d_inode(dentry));
+ } else {
+ ksmbd_err("File(%s): creation failed (err:%d)\n", name, err);
+ }
+ done_path_create(&path, dentry);
+ return err;
+}
+
+/**
+ * ksmbd_vfs_mkdir() - vfs helper for smb create directory
+ * @work: work
+ * @name: directory name
+ * @mode: directory create mode
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode)
+{
+ struct path path;
+ struct dentry *dentry;
+ int err;
+
+ dentry = kern_path_create(AT_FDCWD, name, &path, LOOKUP_DIRECTORY);
+ if (IS_ERR(dentry)) {
+ err = PTR_ERR(dentry);
+ if (err != -EEXIST)
+ ksmbd_debug(VFS, "path create failed for %s, err %d\n",
+ name, err);
+ return err;
+ }
+
+ mode |= S_IFDIR;
+ err = vfs_mkdir(&init_user_ns, d_inode(path.dentry), dentry, mode);
+ if (err) {
+ goto out;
+ } else if (d_unhashed(dentry)) {
+ struct dentry *d;
+
+ d = lookup_one_len(dentry->d_name.name, dentry->d_parent,
+ dentry->d_name.len);
+ if (IS_ERR(d)) {
+ err = PTR_ERR(d);
+ goto out;
+ }
+ if (unlikely(d_is_negative(d))) {
+ dput(d);
+ err = -ENOENT;
+ goto out;
+ }
+
+ ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), d_inode(d));
+ dput(d);
+ }
+out:
+ done_path_create(&path, dentry);
+ if (err)
+ ksmbd_err("mkdir(%s): creation failed (err:%d)\n", name, err);
+ return err;
+}
+
+static ssize_t ksmbd_vfs_getcasexattr(struct dentry *dentry, char *attr_name,
+ int attr_name_len, char **attr_value)
+{
+ char *name, *xattr_list = NULL;
+ ssize_t value_len = -ENOENT, xattr_list_len;
+
+ xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list);
+ if (xattr_list_len <= 0)
+ goto out;
+
+ for (name = xattr_list; name - xattr_list < xattr_list_len;
+ name += strlen(name) + 1) {
+ ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name));
+ if (strncasecmp(attr_name, name, attr_name_len))
+ continue;
+
+ value_len = ksmbd_vfs_getxattr(dentry,
+ name,
+ attr_value);
+ if (value_len < 0)
+ ksmbd_err("failed to get xattr in file\n");
+ break;
+ }
+
+out:
+ kvfree(xattr_list);
+ return value_len;
+}
+
+static int ksmbd_vfs_stream_read(struct ksmbd_file *fp, char *buf, loff_t *pos,
+ size_t count)
+{
+ ssize_t v_len;
+ char *stream_buf = NULL;
+
+ ksmbd_debug(VFS, "read stream data pos : %llu, count : %zd\n",
+ *pos, count);
+
+ v_len = ksmbd_vfs_getcasexattr(fp->filp->f_path.dentry,
+ fp->stream.name,
+ fp->stream.size,
+ &stream_buf);
+ if ((int)v_len <= 0)
+ return (int)v_len;
+
+ if (v_len <= *pos) {
+ count = -EINVAL;
+ goto free_buf;
+ }
+
+ if (v_len - *pos < count)
+ count = v_len - *pos;
+
+ memcpy(buf, &stream_buf[*pos], count);
+
+free_buf:
+ kvfree(stream_buf);
+ return count;
+}
+
+/**
+ * check_lock_range() - vfs helper for smb byte range file locking
+ * @filp: the file to apply the lock to
+ * @start: lock start byte offset
+ * @end: lock end byte offset
+ * @type: byte range type read/write
+ *
+ * Return: 0 on success, otherwise error
+ */
+static int check_lock_range(struct file *filp, loff_t start, loff_t end,
+ unsigned char type)
+{
+ struct file_lock *flock;
+ struct file_lock_context *ctx = file_inode(filp)->i_flctx;
+ int error = 0;
+
+ if (!ctx || list_empty_careful(&ctx->flc_posix))
+ return 0;
+
+ spin_lock(&ctx->flc_lock);
+ list_for_each_entry(flock, &ctx->flc_posix, fl_list) {
+ /* check conflict locks */
+ if (flock->fl_end >= start && end >= flock->fl_start) {
+ if (flock->fl_type == F_RDLCK) {
+ if (type == WRITE) {
+ ksmbd_err("not allow write by shared lock\n");
+ error = 1;
+ goto out;
+ }
+ } else if (flock->fl_type == F_WRLCK) {
+ /* check owner in lock */
+ if (flock->fl_file != filp) {
+ error = 1;
+ ksmbd_err("not allow rw access by exclusive lock from other opens\n");
+ goto out;
+ }
+ }
+ }
+ }
+out:
+ spin_unlock(&ctx->flc_lock);
+ return error;
+}
+
+/**
+ * ksmbd_vfs_read() - vfs helper for smb file read
+ * @work: smb work
+ * @fid: file id of open file
+ * @count: read byte count
+ * @pos: file pos
+ *
+ * Return: number of read bytes on success, otherwise error
+ */
+int ksmbd_vfs_read(struct ksmbd_work *work, struct ksmbd_file *fp, size_t count,
+ loff_t *pos)
+{
+ struct file *filp;
+ ssize_t nbytes = 0;
+ char *rbuf;
+ struct inode *inode;
+
+ rbuf = work->aux_payload_buf;
+ filp = fp->filp;
+ inode = file_inode(filp);
+ if (S_ISDIR(inode->i_mode))
+ return -EISDIR;
+
+ if (unlikely(count == 0))
+ return 0;
+
+ if (work->conn->connection_type) {
+ if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) {
+ ksmbd_err("no right to read(%s)\n", FP_FILENAME(fp));
+ return -EACCES;
+ }
+ }
+
+ if (ksmbd_stream_fd(fp))
+ return ksmbd_vfs_stream_read(fp, rbuf, pos, count);
+
+ if (!work->tcon->posix_extensions) {
+ int ret;
+
+ ret = check_lock_range(filp, *pos, *pos + count - 1, READ);
+ if (ret) {
+ ksmbd_err("unable to read due to lock\n");
+ return -EAGAIN;
+ }
+ }
+
+ nbytes = kernel_read(filp, rbuf, count, pos);
+ if (nbytes < 0) {
+ ksmbd_err("smb read failed for (%s), err = %zd\n",
+ fp->filename, nbytes);
+ return nbytes;
+ }
+
+ filp->f_pos = *pos;
+ return nbytes;
+}
+
+static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos,
+ size_t count)
+{
+ char *stream_buf = NULL, *wbuf;
+ size_t size, v_len;
+ int err = 0;
+
+ ksmbd_debug(VFS, "write stream data pos : %llu, count : %zd\n",
+ *pos, count);
+
+ size = *pos + count;
+ if (size > XATTR_SIZE_MAX) {
+ size = XATTR_SIZE_MAX;
+ count = (*pos + count) - XATTR_SIZE_MAX;
+ }
+
+ v_len = ksmbd_vfs_getcasexattr(fp->filp->f_path.dentry,
+ fp->stream.name,
+ fp->stream.size,
+ &stream_buf);
+ if ((int)v_len < 0) {
+ ksmbd_err("not found stream in xattr : %zd\n", v_len);
+ err = (int)v_len;
+ goto out;
+ }
+
+ if (v_len < size) {
+ wbuf = kvmalloc(size, GFP_KERNEL | __GFP_ZERO);
+ if (!wbuf) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ if (v_len > 0)
+ memcpy(wbuf, stream_buf, v_len);
+ kvfree(stream_buf);
+ stream_buf = wbuf;
+ }
+
+ memcpy(&stream_buf[*pos], buf, count);
+
+ err = ksmbd_vfs_setxattr(fp->filp->f_path.dentry,
+ fp->stream.name,
+ (void *)stream_buf,
+ size,
+ 0);
+ if (err < 0)
+ goto out;
+
+ fp->filp->f_pos = *pos;
+ err = 0;
+out:
+ kvfree(stream_buf);
+ return err;
+}
+
+/**
+ * ksmbd_vfs_write() - vfs helper for smb file write
+ * @work: work
+ * @fid: file id of open file
+ * @buf: buf containing data for writing
+ * @count: read byte count
+ * @pos: file pos
+ * @sync: fsync after write
+ * @written: number of bytes written
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp,
+ char *buf, size_t count, loff_t *pos, bool sync,
+ ssize_t *written)
+{
+ struct ksmbd_session *sess = work->sess;
+ struct file *filp;
+ loff_t offset = *pos;
+ int err = 0;
+
+ if (sess->conn->connection_type) {
+ if (!(fp->daccess & FILE_WRITE_DATA_LE)) {
+ ksmbd_err("no right to write(%s)\n", FP_FILENAME(fp));
+ err = -EACCES;
+ goto out;
+ }
+ }
+
+ filp = fp->filp;
+
+ if (ksmbd_stream_fd(fp)) {
+ err = ksmbd_vfs_stream_write(fp, buf, pos, count);
+ if (!err)
+ *written = count;
+ goto out;
+ }
+
+ if (!work->tcon->posix_extensions) {
+ err = check_lock_range(filp, *pos, *pos + count - 1, WRITE);
+ if (err) {
+ ksmbd_err("unable to write due to lock\n");
+ err = -EAGAIN;
+ goto out;
+ }
+ }
+
+ /* Do we need to break any of a levelII oplock? */
+ smb_break_all_levII_oplock(work, fp, 1);
+
+ err = kernel_write(filp, buf, count, pos);
+ if (err < 0) {
+ ksmbd_debug(VFS, "smb write failed, err = %d\n", err);
+ goto out;
+ }
+
+ filp->f_pos = *pos;
+ *written = err;
+ err = 0;
+ if (sync) {
+ err = vfs_fsync_range(filp, offset, offset + *written, 0);
+ if (err < 0)
+ ksmbd_err("fsync failed for filename = %s, err = %d\n",
+ FP_FILENAME(fp), err);
+ }
+
+out:
+ return err;
+}
+
+/**
+ * ksmbd_vfs_getattr() - vfs helper for smb getattr
+ * @work: work
+ * @fid: file id of open file
+ * @attrs: inode attributes
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_getattr(struct path *path, struct kstat *stat)
+{
+ int err;
+
+ err = vfs_getattr(path, stat, STATX_BTIME, AT_STATX_SYNC_AS_STAT);
+ if (err)
+ ksmbd_err("getattr failed, err %d\n", err);
+ return err;
+}
+
+/**
+ * ksmbd_vfs_fsync() - vfs helper for smb fsync
+ * @work: work
+ * @fid: file id of open file
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_fsync(struct ksmbd_work *work, u64 fid, u64 p_id)
+{
+ struct ksmbd_file *fp;
+ int err;
+
+ fp = ksmbd_lookup_fd_slow(work, fid, p_id);
+ if (!fp) {
+ ksmbd_err("failed to get filp for fid %llu\n", fid);
+ return -ENOENT;
+ }
+ err = vfs_fsync(fp->filp, 0);
+ if (err < 0)
+ ksmbd_err("smb fsync failed, err = %d\n", err);
+ ksmbd_fd_put(work, fp);
+ return err;
+}
+
+/**
+ * ksmbd_vfs_remove_file() - vfs helper for smb rmdir or unlink
+ * @name: absolute directory or file name
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_remove_file(struct ksmbd_work *work, char *name)
+{
+ struct path path;
+ struct dentry *dentry, *parent;
+ int err;
+ int flags = 0;
+
+ if (ksmbd_override_fsids(work))
+ return -ENOMEM;
+
+ if (test_share_config_flag(work->tcon->share_conf,
+ KSMBD_SHARE_FLAG_FOLLOW_SYMLINKS))
+ flags = LOOKUP_FOLLOW;
+
+ err = kern_path(name, flags, &path);
+ if (err) {
+ ksmbd_debug(VFS, "can't get %s, err %d\n", name, err);
+ ksmbd_revert_fsids(work);
+ return err;
+ }
+
+ parent = dget_parent(path.dentry);
+ inode_lock_nested(d_inode(parent), I_MUTEX_PARENT);
+ dentry = lookup_one_len(path.dentry->d_name.name, parent,
+ strlen(path.dentry->d_name.name));
+ if (IS_ERR(dentry)) {
+ err = PTR_ERR(dentry);
+ ksmbd_debug(VFS, "%s: lookup failed, err %d\n",
+ path.dentry->d_name.name, err);
+ goto out_err;
+ }
+
+ if (!d_inode(dentry) || !d_inode(dentry)->i_nlink) {
+ dput(dentry);
+ err = -ENOENT;
+ goto out_err;
+ }
+
+ if (S_ISDIR(d_inode(dentry)->i_mode)) {
+ err = vfs_rmdir(&init_user_ns, d_inode(parent), dentry);
+ if (err && err != -ENOTEMPTY)
+ ksmbd_debug(VFS, "%s: rmdir failed, err %d\n", name,
+ err);
+ } else {
+ err = vfs_unlink(&init_user_ns, d_inode(parent), dentry, NULL);
+ if (err)
+ ksmbd_debug(VFS, "%s: unlink failed, err %d\n", name,
+ err);
+ }
+
+ dput(dentry);
+out_err:
+ inode_unlock(d_inode(parent));
+ dput(parent);
+ path_put(&path);
+ ksmbd_revert_fsids(work);
+ return err;
+}
+
+/**
+ * ksmbd_vfs_link() - vfs helper for creating smb hardlink
+ * @oldname: source file name
+ * @newname: hardlink name
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_link(struct ksmbd_work *work, const char *oldname,
+ const char *newname)
+{
+ struct path oldpath, newpath;
+ struct dentry *dentry;
+ int err;
+ int flags = 0;
+
+ if (ksmbd_override_fsids(work))
+ return -ENOMEM;
+
+ if (test_share_config_flag(work->tcon->share_conf,
+ KSMBD_SHARE_FLAG_FOLLOW_SYMLINKS))
+ flags = LOOKUP_FOLLOW;
+
+ err = kern_path(oldname, flags, &oldpath);
+ if (err) {
+ ksmbd_err("cannot get linux path for %s, err = %d\n",
+ oldname, err);
+ goto out1;
+ }
+
+ dentry = kern_path_create(AT_FDCWD, newname, &newpath,
+ flags | LOOKUP_REVAL);
+ if (IS_ERR(dentry)) {
+ err = PTR_ERR(dentry);
+ ksmbd_err("path create err for %s, err %d\n", newname, err);
+ goto out2;
+ }
+
+ err = -EXDEV;
+ if (oldpath.mnt != newpath.mnt) {
+ ksmbd_err("vfs_link failed err %d\n", err);
+ goto out3;
+ }
+
+ err = vfs_link(oldpath.dentry, &init_user_ns, d_inode(newpath.dentry),
+ dentry, NULL);
+ if (err)
+ ksmbd_debug(VFS, "vfs_link failed err %d\n", err);
+
+out3:
+ done_path_create(&newpath, dentry);
+out2:
+ path_put(&oldpath);
+out1:
+ ksmbd_revert_fsids(work);
+ return err;
+}
+
+static int __ksmbd_vfs_rename(struct ksmbd_work *work,
+ struct dentry *src_dent_parent,
+ struct dentry *src_dent,
+ struct dentry *dst_dent_parent,
+ struct dentry *trap_dent,
+ char *dst_name)
+{
+ struct dentry *dst_dent;
+ int err;
+
+ if (!work->tcon->posix_extensions) {
+ spin_lock(&src_dent->d_lock);
+ list_for_each_entry(dst_dent, &src_dent->d_subdirs, d_child) {
+ struct ksmbd_file *child_fp;
+
+ if (d_really_is_negative(dst_dent))
+ continue;
+
+ child_fp = ksmbd_lookup_fd_inode(d_inode(dst_dent));
+ if (child_fp) {
+ spin_unlock(&src_dent->d_lock);
+ ksmbd_debug(VFS, "Forbid rename, sub file/dir is in use\n");
+ return -EACCES;
+ }
+ }
+ spin_unlock(&src_dent->d_lock);
+ }
+
+ if (d_really_is_negative(src_dent_parent))
+ return -ENOENT;
+ if (d_really_is_negative(dst_dent_parent))
+ return -ENOENT;
+ if (d_really_is_negative(src_dent))
+ return -ENOENT;
+ if (src_dent == trap_dent)
+ return -EINVAL;
+
+ if (ksmbd_override_fsids(work))
+ return -ENOMEM;
+
+ dst_dent = lookup_one_len(dst_name, dst_dent_parent, strlen(dst_name));
+ err = PTR_ERR(dst_dent);
+ if (IS_ERR(dst_dent)) {
+ ksmbd_err("lookup failed %s [%d]\n", dst_name, err);
+ goto out;
+ }
+
+ err = -ENOTEMPTY;
+ if (dst_dent != trap_dent && !d_really_is_positive(dst_dent)) {
+ struct renamedata rd = {
+ .old_mnt_userns = &init_user_ns,
+ .old_dir = d_inode(src_dent_parent),
+ .old_dentry = src_dent,
+ .new_mnt_userns = &init_user_ns,
+ .new_dir = d_inode(dst_dent_parent),
+ .new_dentry = dst_dent,
+ };
+ err = vfs_rename(&rd);
+ }
+ if (err)
+ ksmbd_err("vfs_rename failed err %d\n", err);
+ if (dst_dent)
+ dput(dst_dent);
+out:
+ ksmbd_revert_fsids(work);
+ return err;
+}
+
+int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp,
+ char *newname)
+{
+ struct path dst_path;
+ struct dentry *src_dent_parent, *dst_dent_parent;
+ struct dentry *src_dent, *trap_dent, *src_child;
+ char *dst_name;
+ int err;
+ int flags;
+
+ dst_name = extract_last_component(newname);
+ if (!dst_name)
+ return -EINVAL;
+
+ src_dent_parent = dget_parent(fp->filp->f_path.dentry);
+ src_dent = fp->filp->f_path.dentry;
+
+ flags = LOOKUP_DIRECTORY;
+ if (test_share_config_flag(work->tcon->share_conf,
+ KSMBD_SHARE_FLAG_FOLLOW_SYMLINKS))
+ flags |= LOOKUP_FOLLOW;
+
+ err = kern_path(newname, flags, &dst_path);
+ if (err) {
+ ksmbd_debug(VFS, "Cannot get path for %s [%d]\n", newname, err);
+ goto out;
+ }
+ dst_dent_parent = dst_path.dentry;
+
+ trap_dent = lock_rename(src_dent_parent, dst_dent_parent);
+ dget(src_dent);
+ dget(dst_dent_parent);
+ src_child = lookup_one_len(src_dent->d_name.name, src_dent_parent,
+ src_dent->d_name.len);
+ if (IS_ERR(src_child)) {
+ err = PTR_ERR(src_child);
+ goto out_lock;
+ }
+
+ if (src_child != src_dent) {
+ err = -ESTALE;
+ dput(src_child);
+ goto out_lock;
+ }
+ dput(src_child);
+
+ err = __ksmbd_vfs_rename(work,
+ src_dent_parent,
+ src_dent,
+ dst_dent_parent,
+ trap_dent,
+ dst_name);
+out_lock:
+ dput(src_dent);
+ dput(dst_dent_parent);
+ unlock_rename(src_dent_parent, dst_dent_parent);
+ path_put(&dst_path);
+out:
+ dput(src_dent_parent);
+ return err;
+}
+
+/**
+ * ksmbd_vfs_truncate() - vfs helper for smb file truncate
+ * @work: work
+ * @name: old filename
+ * @fid: file id of old file
+ * @size: truncate to given size
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_truncate(struct ksmbd_work *work, const char *name,
+ struct ksmbd_file *fp, loff_t size)
+{
+ struct path path;
+ int err = 0;
+
+ if (name) {
+ err = kern_path(name, 0, &path);
+ if (err) {
+ ksmbd_err("cannot get linux path for %s, err %d\n",
+ name, err);
+ return err;
+ }
+ err = vfs_truncate(&path, size);
+ if (err)
+ ksmbd_err("truncate failed for %s err %d\n",
+ name, err);
+ path_put(&path);
+ } else {
+ struct file *filp;
+
+ filp = fp->filp;
+
+ /* Do we need to break any of a levelII oplock? */
+ smb_break_all_levII_oplock(work, fp, 1);
+
+ if (!work->tcon->posix_extensions) {
+ struct inode *inode = file_inode(filp);
+
+ if (size < inode->i_size) {
+ err = check_lock_range(filp, size,
+ inode->i_size - 1, WRITE);
+ } else {
+ err = check_lock_range(filp, inode->i_size,
+ size - 1, WRITE);
+ }
+
+ if (err) {
+ ksmbd_err("failed due to lock\n");
+ return -EAGAIN;
+ }
+ }
+
+ err = vfs_truncate(&filp->f_path, size);
+ if (err)
+ ksmbd_err("truncate failed for filename : %s err %d\n",
+ fp->filename, err);
+ }
+
+ return err;
+}
+
+/**
+ * ksmbd_vfs_listxattr() - vfs helper for smb list extended attributes
+ * @dentry: dentry of file for listing xattrs
+ * @list: destination buffer
+ * @size: destination buffer length
+ *
+ * Return: xattr list length on success, otherwise error
+ */
+ssize_t ksmbd_vfs_listxattr(struct dentry *dentry, char **list)
+{
+ ssize_t size;
+ char *vlist = NULL;
+
+ size = vfs_listxattr(dentry, NULL, 0);
+ if (size <= 0)
+ return size;
+
+ vlist = kvmalloc(size, GFP_KERNEL | __GFP_ZERO);
+ if (!vlist)
+ return -ENOMEM;
+
+ *list = vlist;
+ size = vfs_listxattr(dentry, vlist, size);
+ if (size < 0) {
+ ksmbd_debug(VFS, "listxattr failed\n");
+ kvfree(vlist);
+ *list = NULL;
+ }
+
+ return size;
+}
+
+static ssize_t ksmbd_vfs_xattr_len(struct dentry *dentry, char *xattr_name)
+{
+ return vfs_getxattr(&init_user_ns, dentry, xattr_name, NULL, 0);
+}
+
+/**
+ * ksmbd_vfs_getxattr() - vfs helper for smb get extended attributes value
+ * @dentry: dentry of file for getting xattrs
+ * @xattr_name: name of xattr name to query
+ * @xattr_buf: destination buffer xattr value
+ *
+ * Return: read xattr value length on success, otherwise error
+ */
+ssize_t ksmbd_vfs_getxattr(struct dentry *dentry, char *xattr_name,
+ char **xattr_buf)
+{
+ ssize_t xattr_len;
+ char *buf;
+
+ *xattr_buf = NULL;
+ xattr_len = ksmbd_vfs_xattr_len(dentry, xattr_name);
+ if (xattr_len < 0)
+ return xattr_len;
+
+ buf = kmalloc(xattr_len + 1, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ xattr_len = vfs_getxattr(&init_user_ns, dentry, xattr_name,
+ (void *)buf, xattr_len);
+ if (xattr_len > 0)
+ *xattr_buf = buf;
+ else
+ kfree(buf);
+ return xattr_len;
+}
+
+/**
+ * ksmbd_vfs_setxattr() - vfs helper for smb set extended attributes value
+ * @dentry: dentry to set XATTR at
+ * @name: xattr name for setxattr
+ * @value: xattr value to set
+ * @size: size of xattr value
+ * @flags: destination buffer length
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_setxattr(struct dentry *dentry, const char *attr_name,
+ const void *attr_value, size_t attr_size, int flags)
+{
+ int err;
+
+ err = vfs_setxattr(&init_user_ns, dentry,
+ attr_name,
+ attr_value,
+ attr_size,
+ flags);
+ if (err)
+ ksmbd_debug(VFS, "setxattr failed, err %d\n", err);
+ return err;
+}
+
+/**
+ * ksmbd_vfs_set_fadvise() - convert smb IO caching options to linux options
+ * @filp: file pointer for IO
+ * @options: smb IO options
+ */
+void ksmbd_vfs_set_fadvise(struct file *filp, __le32 option)
+{
+ struct address_space *mapping;
+
+ mapping = filp->f_mapping;
+
+ if (!option || !mapping)
+ return;
+
+ if (option & FILE_WRITE_THROUGH_LE) {
+ filp->f_flags |= O_SYNC;
+ } else if (option & FILE_SEQUENTIAL_ONLY_LE) {
+ filp->f_ra.ra_pages = inode_to_bdi(mapping->host)->ra_pages * 2;
+ spin_lock(&filp->f_lock);
+ filp->f_mode &= ~FMODE_RANDOM;
+ spin_unlock(&filp->f_lock);
+ } else if (option & FILE_RANDOM_ACCESS_LE) {
+ spin_lock(&filp->f_lock);
+ filp->f_mode |= FMODE_RANDOM;
+ spin_unlock(&filp->f_lock);
+ }
+}
+
+/**
+ * ksmbd_vfs_lock() - vfs helper for smb file locking
+ * @filp: the file to apply the lock to
+ * @cmd: type of locking operation (F_SETLK, F_GETLK, etc.)
+ * @flock: The lock to be applied
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_lock(struct file *filp, int cmd, struct file_lock *flock)
+{
+ ksmbd_debug(VFS, "calling vfs_lock_file\n");
+ return vfs_lock_file(filp, cmd, flock, NULL);
+}
+
+int ksmbd_vfs_readdir(struct file *file, struct ksmbd_readdir_data *rdata)
+{
+ return iterate_dir(file, &rdata->ctx);
+}
+
+int ksmbd_vfs_alloc_size(struct ksmbd_work *work, struct ksmbd_file *fp,
+ loff_t len)
+{
+ smb_break_all_levII_oplock(work, fp, 1);
+ return vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, len);
+}
+
+int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp,
+ loff_t off, loff_t len)
+{
+ smb_break_all_levII_oplock(work, fp, 1);
+ if (fp->f_ci->m_fattr & ATTR_SPARSE_FILE_LE)
+ return vfs_fallocate(fp->filp,
+ FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
+ off, len);
+
+ return vfs_fallocate(fp->filp, FALLOC_FL_ZERO_RANGE, off, len);
+}
+
+int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length,
+ struct file_allocated_range_buffer *ranges,
+ int in_count, int *out_count)
+{
+ struct file *f = fp->filp;
+ struct inode *inode = FP_INODE(fp);
+ loff_t maxbytes = (u64)inode->i_sb->s_maxbytes, end;
+ loff_t extent_start, extent_end;
+ int ret = 0;
+
+ if (start > maxbytes)
+ return -EFBIG;
+
+ if (!in_count)
+ return 0;
+
+ /*
+ * Shrink request scope to what the fs can actually handle.
+ */
+ if (length > maxbytes || (maxbytes - length) < start)
+ length = maxbytes - start;
+
+ if (start + length > inode->i_size)
+ length = inode->i_size - start;
+
+ *out_count = 0;
+ end = start + length;
+ while (start < end && *out_count < in_count) {
+ extent_start = f->f_op->llseek(f, start, SEEK_DATA);
+ if (extent_start < 0) {
+ if (extent_start != -ENXIO)
+ ret = (int)extent_start;
+ break;
+ }
+
+ if (extent_start >= end)
+ break;
+
+ extent_end = f->f_op->llseek(f, extent_start, SEEK_HOLE);
+ if (extent_end < 0) {
+ if (extent_end != -ENXIO)
+ ret = (int)extent_end;
+ break;
+ } else if (extent_start >= extent_end) {
+ break;
+ }
+
+ ranges[*out_count].file_offset = cpu_to_le64(extent_start);
+ ranges[(*out_count)++].length =
+ cpu_to_le64(min(extent_end, end) - extent_start);
+
+ start = extent_end;
+ }
+
+ return ret;
+}
+
+int ksmbd_vfs_remove_xattr(struct dentry *dentry, char *attr_name)
+{
+ return vfs_removexattr(&init_user_ns, dentry, attr_name);
+}
+
+int ksmbd_vfs_unlink(struct dentry *dir, struct dentry *dentry)
+{
+ struct dentry *child;
+ int err = 0;
+
+ inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
+ dget(dentry);
+ child = lookup_one_len(dentry->d_name.name, dir, dentry->d_name.len);
+ if (IS_ERR(child)) {
+ err = PTR_ERR(child);
+ goto out;
+ }
+
+ if (child != dentry) {
+ err = -ESTALE;
+ dput(child);
+ goto out;
+ }
+ dput(child);
+
+ if (S_ISDIR(d_inode(dentry)->i_mode))
+ err = vfs_rmdir(&init_user_ns, d_inode(dir), dentry);
+ else
+ err = vfs_unlink(&init_user_ns, d_inode(dir), dentry, NULL);
+
+out:
+ dput(dentry);
+ inode_unlock(d_inode(dir));
+ if (err)
+ ksmbd_debug(VFS, "failed to delete, err %d\n", err);
+
+ return err;
+}
+
+/*
+ * ksmbd_vfs_get_logical_sector_size() - get logical sector size from inode
+ * @inode: inode
+ *
+ * Return: logical sector size
+ */
+unsigned short ksmbd_vfs_logical_sector_size(struct inode *inode)
+{
+ struct request_queue *q;
+ unsigned short ret_val = 512;
+
+ if (!inode->i_sb->s_bdev)
+ return ret_val;
+
+ q = inode->i_sb->s_bdev->bd_disk->queue;
+
+ if (q && q->limits.logical_block_size)
+ ret_val = q->limits.logical_block_size;
+
+ return ret_val;
+}
+
+/*
+ * ksmbd_vfs_get_smb2_sector_size() - get fs sector sizes
+ * @inode: inode
+ * @fs_ss: fs sector size struct
+ */
+void ksmbd_vfs_smb2_sector_size(struct inode *inode,
+ struct ksmbd_fs_sector_size *fs_ss)
+{
+ struct request_queue *q;
+
+ fs_ss->logical_sector_size = 512;
+ fs_ss->physical_sector_size = 512;
+ fs_ss->optimal_io_size = 512;
+
+ if (!inode->i_sb->s_bdev)
+ return;
+
+ q = inode->i_sb->s_bdev->bd_disk->queue;
+
+ if (q) {
+ if (q->limits.logical_block_size)
+ fs_ss->logical_sector_size =
+ q->limits.logical_block_size;
+ if (q->limits.physical_block_size)
+ fs_ss->physical_sector_size =
+ q->limits.physical_block_size;
+ if (q->limits.io_opt)
+ fs_ss->optimal_io_size = q->limits.io_opt;
+ }
+}
+
+static int __dir_empty(struct dir_context *ctx, const char *name, int namlen,
+ loff_t offset, u64 ino, unsigned int d_type)
+{
+ struct ksmbd_readdir_data *buf;
+
+ buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
+ buf->dirent_count++;
+
+ if (buf->dirent_count > 2)
+ return -ENOTEMPTY;
+ return 0;
+}
+
+/**
+ * ksmbd_vfs_empty_dir() - check for empty directory
+ * @fp: ksmbd file pointer
+ *
+ * Return: true if directory empty, otherwise false
+ */
+int ksmbd_vfs_empty_dir(struct ksmbd_file *fp)
+{
+ int err;
+ struct ksmbd_readdir_data readdir_data;
+
+ memset(&readdir_data, 0, sizeof(struct ksmbd_readdir_data));
+
+ set_ctx_actor(&readdir_data.ctx, __dir_empty);
+ readdir_data.dirent_count = 0;
+
+ err = ksmbd_vfs_readdir(fp->filp, &readdir_data);
+ if (readdir_data.dirent_count > 2)
+ err = -ENOTEMPTY;
+ else
+ err = 0;
+ return err;
+}
+
+static int __caseless_lookup(struct dir_context *ctx, const char *name,
+ int namlen, loff_t offset, u64 ino,
+ unsigned int d_type)
+{
+ struct ksmbd_readdir_data *buf;
+
+ buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
+
+ if (buf->used != namlen)
+ return 0;
+ if (!strncasecmp((char *)buf->private, name, namlen)) {
+ memcpy((char *)buf->private, name, namlen);
+ buf->dirent_count = 1;
+ return -EEXIST;
+ }
+ return 0;
+}
+
+/**
+ * ksmbd_vfs_lookup_in_dir() - lookup a file in a directory
+ * @dir: path info
+ * @name: filename to lookup
+ * @namelen: filename length
+ *
+ * Return: 0 on success, otherwise error
+ */
+static int ksmbd_vfs_lookup_in_dir(struct path *dir, char *name, size_t namelen)
+{
+ int ret;
+ struct file *dfilp;
+ int flags = O_RDONLY | O_LARGEFILE;
+ struct ksmbd_readdir_data readdir_data = {
+ .ctx.actor = __caseless_lookup,
+ .private = name,
+ .used = namelen,
+ .dirent_count = 0,
+ };
+
+ dfilp = dentry_open(dir, flags, current_cred());
+ if (IS_ERR(dfilp))
+ return PTR_ERR(dfilp);
+
+ ret = ksmbd_vfs_readdir(dfilp, &readdir_data);
+ if (readdir_data.dirent_count > 0)
+ ret = 0;
+ fput(dfilp);
+ return ret;
+}
+
+/**
+ * ksmbd_vfs_kern_path() - lookup a file and get path info
+ * @name: name of file for lookup
+ * @flags: lookup flags
+ * @path: if lookup succeed, return path info
+ * @caseless: caseless filename lookup
+ *
+ * Return: 0 on success, otherwise error
+ */
+int ksmbd_vfs_kern_path(char *name, unsigned int flags, struct path *path,
+ bool caseless)
+{
+ int err;
+
+ if (name[0] != '/')
+ return -EINVAL;
+
+ err = kern_path(name, flags, path);
+ if (!err)
+ return 0;
+
+ if (caseless) {
+ char *filepath;
+ struct path parent;
+ size_t path_len, remain_len;
+
+ filepath = kstrdup(name, GFP_KERNEL);
+ if (!filepath)
+ return -ENOMEM;
+
+ path_len = strlen(filepath);
+ remain_len = path_len - 1;
+
+ err = kern_path("/", flags, &parent);
+ if (err)
+ goto out;
+
+ while (d_can_lookup(parent.dentry)) {
+ char *filename = filepath + path_len - remain_len;
+ char *next = strchrnul(filename, '/');
+ size_t filename_len = next - filename;
+ bool is_last = !next[0];
+
+ if (filename_len == 0)
+ break;
+
+ err = ksmbd_vfs_lookup_in_dir(&parent, filename,
+ filename_len);
+ if (err) {
+ path_put(&parent);
+ goto out;
+ }
+
+ path_put(&parent);
+ next[0] = '\0';
+
+ err = kern_path(filepath, flags, &parent);
+ if (err)
+ goto out;
+
+ if (is_last) {
+ path->mnt = parent.mnt;
+ path->dentry = parent.dentry;
+ goto out;
+ }
+
+ next[0] = '/';
+ remain_len -= filename_len + 1;
+ }
+
+ path_put(&parent);
+ err = -EINVAL;
+out:
+ kfree(filepath);
+ }
+ return err;
+}
+
+int ksmbd_vfs_remove_acl_xattrs(struct dentry *dentry)
+{
+ char *name, *xattr_list = NULL;
+ ssize_t xattr_list_len;
+ int err = 0;
+
+ xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list);
+ if (xattr_list_len < 0) {
+ goto out;
+ } else if (!xattr_list_len) {
+ ksmbd_debug(SMB, "empty xattr in the file\n");
+ goto out;
+ }
+
+ for (name = xattr_list; name - xattr_list < xattr_list_len;
+ name += strlen(name) + 1) {
+ ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
+
+ if (!strncmp(name, XATTR_NAME_POSIX_ACL_ACCESS,
+ sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1) ||
+ !strncmp(name, XATTR_NAME_POSIX_ACL_DEFAULT,
+ sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1)) {
+ err = ksmbd_vfs_remove_xattr(dentry, name);
+ if (err)
+ ksmbd_debug(SMB,
+ "remove acl xattr failed : %s\n", name);
+ }
+ }
+out:
+ kvfree(xattr_list);
+ return err;
+}
+
+int ksmbd_vfs_remove_sd_xattrs(struct dentry *dentry)
+{
+ char *name, *xattr_list = NULL;
+ ssize_t xattr_list_len;
+ int err = 0;
+
+ xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list);
+ if (xattr_list_len < 0) {
+ goto out;
+ } else if (!xattr_list_len) {
+ ksmbd_debug(SMB, "empty xattr in the file\n");
+ goto out;
+ }
+
+ for (name = xattr_list; name - xattr_list < xattr_list_len;
+ name += strlen(name) + 1) {
+ ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
+
+ if (!strncmp(name, XATTR_NAME_SD, XATTR_NAME_SD_LEN)) {
+ err = ksmbd_vfs_remove_xattr(dentry, name);
+ if (err)
+ ksmbd_debug(SMB, "remove xattr failed : %s\n", name);
+ }
+ }
+out:
+ kvfree(xattr_list);
+ return err;
+}
+
+static struct xattr_smb_acl *ksmbd_vfs_make_xattr_posix_acl(struct inode *inode,
+ int acl_type)
+{
+ struct xattr_smb_acl *smb_acl = NULL;
+ struct posix_acl *posix_acls;
+ struct posix_acl_entry *pa_entry;
+ struct xattr_acl_entry *xa_entry;
+ int i;
+
+ posix_acls = ksmbd_vfs_get_acl(inode, acl_type);
+ if (!posix_acls)
+ return NULL;
+
+ smb_acl = kzalloc(sizeof(struct xattr_smb_acl) +
+ sizeof(struct xattr_acl_entry) * posix_acls->a_count,
+ GFP_KERNEL);
+ if (!smb_acl)
+ goto out;
+
+ smb_acl->count = posix_acls->a_count;
+ pa_entry = posix_acls->a_entries;
+ xa_entry = smb_acl->entries;
+ for (i = 0; i < posix_acls->a_count; i++, pa_entry++, xa_entry++) {
+ switch (pa_entry->e_tag) {
+ case ACL_USER:
+ xa_entry->type = SMB_ACL_USER;
+ xa_entry->uid = from_kuid(&init_user_ns, pa_entry->e_uid);
+ break;
+ case ACL_USER_OBJ:
+ xa_entry->type = SMB_ACL_USER_OBJ;
+ break;
+ case ACL_GROUP:
+ xa_entry->type = SMB_ACL_GROUP;
+ xa_entry->gid = from_kgid(&init_user_ns, pa_entry->e_gid);
+ break;
+ case ACL_GROUP_OBJ:
+ xa_entry->type = SMB_ACL_GROUP_OBJ;
+ break;
+ case ACL_OTHER:
+ xa_entry->type = SMB_ACL_OTHER;
+ break;
+ case ACL_MASK:
+ xa_entry->type = SMB_ACL_MASK;
+ break;
+ default:
+ ksmbd_err("unknown type : 0x%x\n", pa_entry->e_tag);
+ goto out;
+ }
+
+ if (pa_entry->e_perm & ACL_READ)
+ xa_entry->perm |= SMB_ACL_READ;
+ if (pa_entry->e_perm & ACL_WRITE)
+ xa_entry->perm |= SMB_ACL_WRITE;
+ if (pa_entry->e_perm & ACL_EXECUTE)
+ xa_entry->perm |= SMB_ACL_EXECUTE;
+ }
+out:
+ posix_acl_release(posix_acls);
+ return smb_acl;
+}
+
+int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn, struct dentry *dentry,
+ struct smb_ntsd *pntsd, int len)
+{
+ int rc;
+ struct ndr sd_ndr = {0}, acl_ndr = {0};
+ struct xattr_ntacl acl = {0};
+ struct xattr_smb_acl *smb_acl, *def_smb_acl = NULL;
+ struct inode *inode = d_inode(dentry);
+
+ acl.version = 4;
+ acl.hash_type = XATTR_SD_HASH_TYPE_SHA256;
+ acl.current_time = ksmbd_UnixTimeToNT(current_time(inode));
+
+ memcpy(acl.desc, "posix_acl", 9);
+ acl.desc_len = 10;
+
+ pntsd->osidoffset =
+ cpu_to_le32(le32_to_cpu(pntsd->osidoffset) + NDR_NTSD_OFFSETOF);
+ pntsd->gsidoffset =
+ cpu_to_le32(le32_to_cpu(pntsd->gsidoffset) + NDR_NTSD_OFFSETOF);
+ pntsd->dacloffset =
+ cpu_to_le32(le32_to_cpu(pntsd->dacloffset) + NDR_NTSD_OFFSETOF);
+
+ acl.sd_buf = (char *)pntsd;
+ acl.sd_size = len;
+
+ rc = ksmbd_gen_sd_hash(conn, acl.sd_buf, acl.sd_size, acl.hash);
+ if (rc) {
+ ksmbd_err("failed to generate hash for ndr acl\n");
+ return rc;
+ }
+
+ smb_acl = ksmbd_vfs_make_xattr_posix_acl(inode, ACL_TYPE_ACCESS);
+ if (S_ISDIR(inode->i_mode))
+ def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(inode,
+ ACL_TYPE_DEFAULT);
+
+ rc = ndr_encode_posix_acl(&acl_ndr, inode, smb_acl, def_smb_acl);
+ if (rc) {
+ ksmbd_err("failed to encode ndr to posix acl\n");
+ goto out;
+ }
+
+ rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset,
+ acl.posix_acl_hash);
+ if (rc) {
+ ksmbd_err("failed to generate hash for ndr acl\n");
+ goto out;
+ }
+
+ rc = ndr_encode_v4_ntacl(&sd_ndr, &acl);
+ if (rc) {
+ ksmbd_err("failed to encode ndr to posix acl\n");
+ goto out;
+ }
+
+ rc = ksmbd_vfs_setxattr(dentry, XATTR_NAME_SD, sd_ndr.data,
+ sd_ndr.offset, 0);
+ if (rc < 0)
+ ksmbd_err("Failed to store XATTR ntacl :%d\n", rc);
+
+ kfree(sd_ndr.data);
+out:
+ kfree(acl_ndr.data);
+ kfree(smb_acl);
+ kfree(def_smb_acl);
+ return rc;
+}
+
+int ksmbd_vfs_get_sd_xattr(struct ksmbd_conn *conn, struct dentry *dentry,
+ struct smb_ntsd **pntsd)
+{
+ int rc;
+ struct ndr n;
+
+ rc = ksmbd_vfs_getxattr(dentry, XATTR_NAME_SD, &n.data);
+ if (rc > 0) {
+ struct inode *inode = d_inode(dentry);
+ struct ndr acl_ndr = {0};
+ struct xattr_ntacl acl;
+ struct xattr_smb_acl *smb_acl = NULL, *def_smb_acl = NULL;
+ __u8 cmp_hash[XATTR_SD_HASH_SIZE] = {0};
+
+ n.length = rc;
+ rc = ndr_decode_v4_ntacl(&n, &acl);
+ if (rc)
+ return rc;
+
+ smb_acl = ksmbd_vfs_make_xattr_posix_acl(inode,
+ ACL_TYPE_ACCESS);
+ if (S_ISDIR(inode->i_mode))
+ def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(inode,
+ ACL_TYPE_DEFAULT);
+
+ rc = ndr_encode_posix_acl(&acl_ndr, inode, smb_acl, def_smb_acl);
+ if (rc) {
+ ksmbd_err("failed to encode ndr to posix acl\n");
+ goto out;
+ }
+
+ rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset,
+ cmp_hash);
+ if (rc) {
+ ksmbd_err("failed to generate hash for ndr acl\n");
+ goto out;
+ }
+
+ if (memcmp(cmp_hash, acl.posix_acl_hash, XATTR_SD_HASH_SIZE)) {
+ ksmbd_err("hash value diff\n");
+ rc = -EINVAL;
+ goto out;
+ }
+
+ *pntsd = acl.sd_buf;
+ (*pntsd)->osidoffset =
+ cpu_to_le32(le32_to_cpu((*pntsd)->osidoffset) - NDR_NTSD_OFFSETOF);
+ (*pntsd)->gsidoffset =
+ cpu_to_le32(le32_to_cpu((*pntsd)->gsidoffset) - NDR_NTSD_OFFSETOF);
+ (*pntsd)->dacloffset =
+ cpu_to_le32(le32_to_cpu((*pntsd)->dacloffset) - NDR_NTSD_OFFSETOF);
+
+ rc = acl.sd_size;
+out:
+ kfree(n.data);
+ kfree(acl_ndr.data);
+ kfree(smb_acl);
+ kfree(def_smb_acl);
+ }
+
+ return rc;
+}
+
+int ksmbd_vfs_set_dos_attrib_xattr(struct dentry *dentry,
+ struct xattr_dos_attrib *da)
+{
+ struct ndr n;
+ int err;
+
+ err = ndr_encode_dos_attr(&n, da);
+ if (err)
+ return err;
+
+ err = ksmbd_vfs_setxattr(dentry, XATTR_NAME_DOS_ATTRIBUTE,
+ (void *)n.data, n.offset, 0);
+ if (err)
+ ksmbd_debug(SMB, "failed to store dos attribute in xattr\n");
+ kfree(n.data);
+
+ return err;
+}
+
+int ksmbd_vfs_get_dos_attrib_xattr(struct dentry *dentry,
+ struct xattr_dos_attrib *da)
+{
+ struct ndr n;
+ int err;
+
+ err = ksmbd_vfs_getxattr(dentry, XATTR_NAME_DOS_ATTRIBUTE,
+ (char **)&n.data);
+ if (err > 0) {
+ n.length = err;
+ if (ndr_decode_dos_attr(&n, da))
+ err = -EINVAL;
+ kfree(n.data);
+ } else {
+ ksmbd_debug(SMB, "failed to load dos attribute in xattr\n");
+ }
+
+ return err;
+}
+
+struct posix_acl *ksmbd_vfs_posix_acl_alloc(int count, gfp_t flags)
+{
+#if IS_ENABLED(CONFIG_FS_POSIX_ACL)
+ return posix_acl_alloc(count, flags);
+#else
+ return NULL;
+#endif
+}
+
+struct posix_acl *ksmbd_vfs_get_acl(struct inode *inode, int type)
+{
+#if IS_ENABLED(CONFIG_FS_POSIX_ACL)
+ return get_acl(inode, type);
+#else
+ return NULL;
+#endif
+}
+
+int ksmbd_vfs_set_posix_acl(struct inode *inode, int type,
+ struct posix_acl *acl)
+{
+#if IS_ENABLED(CONFIG_FS_POSIX_ACL)
+ return set_posix_acl(&init_user_ns, inode, type, acl);
+#else
+ return -EOPNOTSUPP;
+#endif
+}
+
+/**
+ * ksmbd_vfs_init_kstat() - convert unix stat information to smb stat format
+ * @p: destination buffer
+ * @ksmbd_kstat: ksmbd kstat wrapper
+ */
+void *ksmbd_vfs_init_kstat(char **p, struct ksmbd_kstat *ksmbd_kstat)
+{
+ struct file_directory_info *info = (struct file_directory_info *)(*p);
+ struct kstat *kstat = ksmbd_kstat->kstat;
+ u64 time;
+
+ info->FileIndex = 0;
+ info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
+ time = ksmbd_UnixTimeToNT(kstat->atime);
+ info->LastAccessTime = cpu_to_le64(time);
+ time = ksmbd_UnixTimeToNT(kstat->mtime);
+ info->LastWriteTime = cpu_to_le64(time);
+ time = ksmbd_UnixTimeToNT(kstat->ctime);
+ info->ChangeTime = cpu_to_le64(time);
+
+ if (ksmbd_kstat->file_attributes & ATTR_DIRECTORY_LE) {
+ info->EndOfFile = 0;
+ info->AllocationSize = 0;
+ } else {
+ info->EndOfFile = cpu_to_le64(kstat->size);
+ info->AllocationSize = cpu_to_le64(kstat->blocks << 9);
+ }
+ info->ExtFileAttributes = ksmbd_kstat->file_attributes;
+
+ return info;
+}
+
+int ksmbd_vfs_fill_dentry_attrs(struct ksmbd_work *work, struct dentry *dentry,
+ struct ksmbd_kstat *ksmbd_kstat)
+{
+ u64 time;
+ int rc;
+
+ generic_fillattr(&init_user_ns, d_inode(dentry), ksmbd_kstat->kstat);
+
+ time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
+ ksmbd_kstat->create_time = time;
+
+ /*
+ * set default value for the case that store dos attributes is not yes
+ * or that acl is disable in server's filesystem and the config is yes.
+ */
+ if (S_ISDIR(ksmbd_kstat->kstat->mode))
+ ksmbd_kstat->file_attributes = ATTR_DIRECTORY_LE;
+ else
+ ksmbd_kstat->file_attributes = ATTR_ARCHIVE_LE;
+
+ if (test_share_config_flag(work->tcon->share_conf,
+ KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
+ struct xattr_dos_attrib da;
+
+ rc = ksmbd_vfs_get_dos_attrib_xattr(dentry, &da);
+ if (rc > 0) {
+ ksmbd_kstat->file_attributes = cpu_to_le32(da.attr);
+ ksmbd_kstat->create_time = da.create_time;
+ } else {
+ ksmbd_debug(VFS, "fail to load dos attribute.\n");
+ }
+ }
+
+ return 0;
+}
+
+ssize_t ksmbd_vfs_casexattr_len(struct dentry *dentry, char *attr_name,
+ int attr_name_len)
+{
+ char *name, *xattr_list = NULL;
+ ssize_t value_len = -ENOENT, xattr_list_len;
+
+ xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list);
+ if (xattr_list_len <= 0)
+ goto out;
+
+ for (name = xattr_list; name - xattr_list < xattr_list_len;
+ name += strlen(name) + 1) {
+ ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name));
+ if (strncasecmp(attr_name, name, attr_name_len))
+ continue;
+
+ value_len = ksmbd_vfs_xattr_len(dentry, name);
+ break;
+ }
+
+out:
+ kvfree(xattr_list);
+ return value_len;
+}
+
+int ksmbd_vfs_xattr_stream_name(char *stream_name, char **xattr_stream_name,
+ size_t *xattr_stream_name_size, int s_type)
+{
+ int stream_name_size;
+ char *xattr_stream_name_buf;
+ char *type;
+ int type_len;
+
+ if (s_type == DIR_STREAM)
+ type = ":$INDEX_ALLOCATION";
+ else
+ type = ":$DATA";
+
+ type_len = strlen(type);
+ stream_name_size = strlen(stream_name);
+ *xattr_stream_name_size = stream_name_size + XATTR_NAME_STREAM_LEN + 1;
+ xattr_stream_name_buf = kmalloc(*xattr_stream_name_size + type_len,
+ GFP_KERNEL);
+ if (!xattr_stream_name_buf)
+ return -ENOMEM;
+
+ memcpy(xattr_stream_name_buf, XATTR_NAME_STREAM, XATTR_NAME_STREAM_LEN);
+
+ if (stream_name_size) {
+ memcpy(&xattr_stream_name_buf[XATTR_NAME_STREAM_LEN],
+ stream_name, stream_name_size);
+ }
+ memcpy(&xattr_stream_name_buf[*xattr_stream_name_size - 1], type, type_len);
+ *xattr_stream_name_size += type_len;
+
+ xattr_stream_name_buf[*xattr_stream_name_size - 1] = '\0';
+ *xattr_stream_name = xattr_stream_name_buf;
+
+ return 0;
+}
+
+int ksmbd_vfs_copy_file_range(struct file *file_in, loff_t pos_in,
+ struct file *file_out, loff_t pos_out, size_t len)
+{
+ struct inode *inode_in = file_inode(file_in);
+ struct inode *inode_out = file_inode(file_out);
+ int ret;
+
+ ret = vfs_copy_file_range(file_in, pos_in, file_out, pos_out, len, 0);
+ /* do splice for the copy between different file systems */
+ if (ret != -EXDEV)
+ return ret;
+
+ if (S_ISDIR(inode_in->i_mode) || S_ISDIR(inode_out->i_mode))
+ return -EISDIR;
+ if (!S_ISREG(inode_in->i_mode) || !S_ISREG(inode_out->i_mode))
+ return -EINVAL;
+
+ if (!(file_in->f_mode & FMODE_READ) ||
+ !(file_out->f_mode & FMODE_WRITE))
+ return -EBADF;
+
+ if (len == 0)
+ return 0;
+
+ file_start_write(file_out);
+
+ /*
+ * skip the verification of the range of data. it will be done
+ * in do_splice_direct
+ */
+ ret = do_splice_direct(file_in, &pos_in, file_out, &pos_out,
+ len > MAX_RW_COUNT ? MAX_RW_COUNT : len, 0);
+ if (ret > 0) {
+ fsnotify_access(file_in);
+ add_rchar(current, ret);
+ fsnotify_modify(file_out);
+ add_wchar(current, ret);
+ }
+
+ inc_syscr(current);
+ inc_syscw(current);
+
+ file_end_write(file_out);
+ return ret;
+}
+
+int ksmbd_vfs_copy_file_ranges(struct ksmbd_work *work,
+ struct ksmbd_file *src_fp,
+ struct ksmbd_file *dst_fp,
+ struct srv_copychunk *chunks,
+ unsigned int chunk_count,
+ unsigned int *chunk_count_written,
+ unsigned int *chunk_size_written,
+ loff_t *total_size_written)
+{
+ unsigned int i;
+ loff_t src_off, dst_off, src_file_size;
+ size_t len;
+ int ret;
+
+ *chunk_count_written = 0;
+ *chunk_size_written = 0;
+ *total_size_written = 0;
+
+ if (!(src_fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) {
+ ksmbd_err("no right to read(%s)\n", FP_FILENAME(src_fp));
+ return -EACCES;
+ }
+ if (!(dst_fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE))) {
+ ksmbd_err("no right to write(%s)\n", FP_FILENAME(dst_fp));
+ return -EACCES;
+ }
+
+ if (ksmbd_stream_fd(src_fp) || ksmbd_stream_fd(dst_fp))
+ return -EBADF;
+
+ smb_break_all_levII_oplock(work, dst_fp, 1);
+
+ if (!work->tcon->posix_extensions) {
+ for (i = 0; i < chunk_count; i++) {
+ src_off = le64_to_cpu(chunks[i].SourceOffset);
+ dst_off = le64_to_cpu(chunks[i].TargetOffset);
+ len = le32_to_cpu(chunks[i].Length);
+
+ if (check_lock_range(src_fp->filp, src_off,
+ src_off + len - 1, READ))
+ return -EAGAIN;
+ if (check_lock_range(dst_fp->filp, dst_off,
+ dst_off + len - 1, WRITE))
+ return -EAGAIN;
+ }
+ }
+
+ src_file_size = i_size_read(file_inode(src_fp->filp));
+
+ for (i = 0; i < chunk_count; i++) {
+ src_off = le64_to_cpu(chunks[i].SourceOffset);
+ dst_off = le64_to_cpu(chunks[i].TargetOffset);
+ len = le32_to_cpu(chunks[i].Length);
+
+ if (src_off + len > src_file_size)
+ return -E2BIG;
+
+ ret = ksmbd_vfs_copy_file_range(src_fp->filp, src_off,
+ dst_fp->filp, dst_off, len);
+ if (ret < 0)
+ return ret;
+
+ *chunk_count_written += 1;
+ *total_size_written += ret;
+ }
+ return 0;
+}
+
+int ksmbd_vfs_posix_lock_wait(struct file_lock *flock)
+{
+ return wait_event_interruptible(flock->fl_wait, !flock->fl_blocker);
+}
+
+int ksmbd_vfs_posix_lock_wait_timeout(struct file_lock *flock, long timeout)
+{
+ return wait_event_interruptible_timeout(flock->fl_wait,
+ !flock->fl_blocker,
+ timeout);
+}
+
+void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock)
+{
+ locks_delete_block(flock);
+}
+
+int ksmbd_vfs_set_init_posix_acl(struct inode *inode)
+{
+ struct posix_acl_state acl_state;
+ struct posix_acl *acls;
+ int rc;
+
+ ksmbd_debug(SMB, "Set posix acls\n");
+ rc = init_acl_state(&acl_state, 1);
+ if (rc)
+ return rc;
+
+ /* Set default owner group */
+ acl_state.owner.allow = (inode->i_mode & 0700) >> 6;
+ acl_state.group.allow = (inode->i_mode & 0070) >> 3;
+ acl_state.other.allow = inode->i_mode & 0007;
+ acl_state.users->aces[acl_state.users->n].uid = inode->i_uid;
+ acl_state.users->aces[acl_state.users->n++].perms.allow =
+ acl_state.owner.allow;
+ acl_state.groups->aces[acl_state.groups->n].gid = inode->i_gid;
+ acl_state.groups->aces[acl_state.groups->n++].perms.allow =
+ acl_state.group.allow;
+ acl_state.mask.allow = 0x07;
+
+ acls = ksmbd_vfs_posix_acl_alloc(6, GFP_KERNEL);
+ if (!acls) {
+ free_acl_state(&acl_state);
+ return -ENOMEM;
+ }
+ posix_state_to_acl(&acl_state, acls->a_entries);
+ rc = ksmbd_vfs_set_posix_acl(inode, ACL_TYPE_ACCESS, acls);
+ if (rc < 0)
+ ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n",
+ rc);
+ else if (S_ISDIR(inode->i_mode)) {
+ posix_state_to_acl(&acl_state, acls->a_entries);
+ rc = ksmbd_vfs_set_posix_acl(inode, ACL_TYPE_DEFAULT, acls);
+ if (rc < 0)
+ ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n",
+ rc);
+ }
+ free_acl_state(&acl_state);
+ posix_acl_release(acls);
+ return rc;
+}
+
+int ksmbd_vfs_inherit_posix_acl(struct inode *inode, struct inode *parent_inode)
+{
+ struct posix_acl *acls;
+ struct posix_acl_entry *pace;
+ int rc, i;
+
+ acls = ksmbd_vfs_get_acl(parent_inode, ACL_TYPE_DEFAULT);
+ if (!acls)
+ return -ENOENT;
+ pace = acls->a_entries;
+
+ for (i = 0; i < acls->a_count; i++, pace++) {
+ if (pace->e_tag == ACL_MASK) {
+ pace->e_perm = 0x07;
+ break;
+ }
+ }
+
+ rc = ksmbd_vfs_set_posix_acl(inode, ACL_TYPE_ACCESS, acls);
+ if (rc < 0)
+ ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n",
+ rc);
+ if (S_ISDIR(inode->i_mode)) {
+ rc = ksmbd_vfs_set_posix_acl(inode, ACL_TYPE_DEFAULT, acls);
+ if (rc < 0)
+ ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n",
+ rc);
+ }
+ posix_acl_release(acls);
+ return rc;
+}
diff --git a/fs/cifsd/vfs.h b/fs/cifsd/vfs.h
new file mode 100644
index 000000000000..5db1e9e2a754
--- /dev/null
+++ b/fs/cifsd/vfs.h
@@ -0,0 +1,275 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
+ * Copyright (C) 2018 Samsung Electronics Co., Ltd.
+ */
+
+#ifndef __KSMBD_VFS_H__
+#define __KSMBD_VFS_H__
+
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/namei.h>
+#include <uapi/linux/xattr.h>
+#include <linux/posix_acl.h>
+
+#include "smbacl.h"
+
+/* STREAM XATTR PREFIX */
+#define STREAM_PREFIX "DosStream."
+#define STREAM_PREFIX_LEN (sizeof(STREAM_PREFIX) - 1)
+#define XATTR_NAME_STREAM (XATTR_USER_PREFIX STREAM_PREFIX)
+#define XATTR_NAME_STREAM_LEN (sizeof(XATTR_NAME_STREAM) - 1)
+
+enum {
+ XATTR_DOSINFO_ATTRIB = 0x00000001,
+ XATTR_DOSINFO_EA_SIZE = 0x00000002,
+ XATTR_DOSINFO_SIZE = 0x00000004,
+ XATTR_DOSINFO_ALLOC_SIZE = 0x00000008,
+ XATTR_DOSINFO_CREATE_TIME = 0x00000010,
+ XATTR_DOSINFO_CHANGE_TIME = 0x00000020,
+ XATTR_DOSINFO_ITIME = 0x00000040
+};
+
+struct xattr_dos_attrib {
+ __u16 version;
+ __u32 flags;
+ __u32 attr;
+ __u32 ea_size;
+ __u64 size;
+ __u64 alloc_size;
+ __u64 create_time;
+ __u64 change_time;
+ __u64 itime;
+};
+
+/* DOS ATTRIBUITE XATTR PREFIX */
+#define DOS_ATTRIBUTE_PREFIX "DOSATTRIB"
+#define DOS_ATTRIBUTE_PREFIX_LEN (sizeof(DOS_ATTRIBUTE_PREFIX) - 1)
+#define XATTR_NAME_DOS_ATTRIBUTE \
+ (XATTR_USER_PREFIX DOS_ATTRIBUTE_PREFIX)
+#define XATTR_NAME_DOS_ATTRIBUTE_LEN \
+ (sizeof(XATTR_USER_PREFIX DOS_ATTRIBUTE_PREFIX) - 1)
+
+#define XATTR_SD_HASH_TYPE_SHA256 0x1
+#define XATTR_SD_HASH_SIZE 64
+
+#define SMB_ACL_READ 4
+#define SMB_ACL_WRITE 2
+#define SMB_ACL_EXECUTE 1
+
+enum {
+ SMB_ACL_TAG_INVALID = 0,
+ SMB_ACL_USER,
+ SMB_ACL_USER_OBJ,
+ SMB_ACL_GROUP,
+ SMB_ACL_GROUP_OBJ,
+ SMB_ACL_OTHER,
+ SMB_ACL_MASK
+};
+
+struct xattr_acl_entry {
+ int type;
+ uid_t uid;
+ gid_t gid;
+ mode_t perm;
+};
+
+struct xattr_smb_acl {
+ int count;
+ int next;
+ struct xattr_acl_entry entries[0];
+};
+
+struct xattr_ntacl {
+ __u16 version;
+ void *sd_buf;
+ __u32 sd_size;
+ __u16 hash_type;
+ __u8 desc[10];
+ __u16 desc_len;
+ __u64 current_time;
+ __u8 hash[XATTR_SD_HASH_SIZE];
+ __u8 posix_acl_hash[XATTR_SD_HASH_SIZE];
+};
+
+/* SECURITY DESCRIPTOR XATTR PREFIX */
+#define SD_PREFIX "NTACL"
+#define SD_PREFIX_LEN (sizeof(SD_PREFIX) - 1)
+#define XATTR_NAME_SD \
+ (XATTR_SECURITY_PREFIX SD_PREFIX)
+#define XATTR_NAME_SD_LEN \
+ (sizeof(XATTR_SECURITY_PREFIX SD_PREFIX) - 1)
+
+/* CreateOptions */
+/* Flag is set, it must not be a file , valid for directory only */
+#define FILE_DIRECTORY_FILE_LE cpu_to_le32(0x00000001)
+#define FILE_WRITE_THROUGH_LE cpu_to_le32(0x00000002)
+#define FILE_SEQUENTIAL_ONLY_LE cpu_to_le32(0x00000004)
+
+/* Should not buffer on server*/
+#define FILE_NO_INTERMEDIATE_BUFFERING_LE cpu_to_le32(0x00000008)
+/* MBZ */
+#define FILE_SYNCHRONOUS_IO_ALERT_LE cpu_to_le32(0x00000010)
+/* MBZ */
+#define FILE_SYNCHRONOUS_IO_NONALERT_LE cpu_to_le32(0x00000020)
+
+/* Flaf must not be set for directory */
+#define FILE_NON_DIRECTORY_FILE_LE cpu_to_le32(0x00000040)
+
+/* Should be zero */
+#define CREATE_TREE_CONNECTION cpu_to_le32(0x00000080)
+#define FILE_COMPLETE_IF_OPLOCKED_LE cpu_to_le32(0x00000100)
+#define FILE_NO_EA_KNOWLEDGE_LE cpu_to_le32(0x00000200)
+#define FILE_OPEN_REMOTE_INSTANCE cpu_to_le32(0x00000400)
+
+/**
+ * Doc says this is obsolete "open for recovery" flag should be zero
+ * in any case.
+ */
+#define CREATE_OPEN_FOR_RECOVERY cpu_to_le32(0x00000400)
+#define FILE_RANDOM_ACCESS_LE cpu_to_le32(0x00000800)
+#define FILE_DELETE_ON_CLOSE_LE cpu_to_le32(0x00001000)
+#define FILE_OPEN_BY_FILE_ID_LE cpu_to_le32(0x00002000)
+#define FILE_OPEN_FOR_BACKUP_INTENT_LE cpu_to_le32(0x00004000)
+#define FILE_NO_COMPRESSION_LE cpu_to_le32(0x00008000)
+
+/* Should be zero*/
+#define FILE_OPEN_REQUIRING_OPLOCK cpu_to_le32(0x00010000)
+#define FILE_DISALLOW_EXCLUSIVE cpu_to_le32(0x00020000)
+#define FILE_RESERVE_OPFILTER_LE cpu_to_le32(0x00100000)
+#define FILE_OPEN_REPARSE_POINT_LE cpu_to_le32(0x00200000)
+#define FILE_OPEN_NO_RECALL_LE cpu_to_le32(0x00400000)
+
+/* Should be zero */
+#define FILE_OPEN_FOR_FREE_SPACE_QUERY_LE cpu_to_le32(0x00800000)
+#define CREATE_OPTIONS_MASK cpu_to_le32(0x00FFFFFF)
+#define CREATE_OPTION_READONLY 0x10000000
+/* system. NB not sent over wire */
+#define CREATE_OPTION_SPECIAL 0x20000000
+
+struct ksmbd_work;
+struct ksmbd_file;
+struct ksmbd_conn;
+
+struct ksmbd_dir_info {
+ const char *name;
+ char *wptr;
+ char *rptr;
+ int name_len;
+ int out_buf_len;
+ int num_entry;
+ int data_count;
+ int last_entry_offset;
+ bool hide_dot_file;
+ int flags;
+};
+
+struct ksmbd_readdir_data {
+ struct dir_context ctx;
+ union {
+ void *private;
+ char *dirent;
+ };
+
+ unsigned int used;
+ unsigned int dirent_count;
+ unsigned int file_attr;
+};
+
+/* ksmbd kstat wrapper to get valid create time when reading dir entry */
+struct ksmbd_kstat {
+ struct kstat *kstat;
+ unsigned long long create_time;
+ __le32 file_attributes;
+};
+
+struct ksmbd_fs_sector_size {
+ unsigned short logical_sector_size;
+ unsigned int physical_sector_size;
+ unsigned int optimal_io_size;
+};
+
+int ksmbd_vfs_inode_permission(struct dentry *dentry, int acc_mode,
+ bool delete);
+int ksmbd_vfs_query_maximal_access(struct dentry *dentry, __le32 *daccess);
+int ksmbd_vfs_create(struct ksmbd_work *work, const char *name, umode_t mode);
+int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode);
+int ksmbd_vfs_read(struct ksmbd_work *work, struct ksmbd_file *fp,
+ size_t count, loff_t *pos);
+int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp,
+ char *buf, size_t count, loff_t *pos, bool sync,
+ ssize_t *written);
+int ksmbd_vfs_fsync(struct ksmbd_work *work, u64 fid, u64 p_id);
+int ksmbd_vfs_remove_file(struct ksmbd_work *work, char *name);
+int ksmbd_vfs_link(struct ksmbd_work *work,
+ const char *oldname, const char *newname);
+int ksmbd_vfs_getattr(struct path *path, struct kstat *stat);
+int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp,
+ char *newname);
+int ksmbd_vfs_truncate(struct ksmbd_work *work, const char *name,
+ struct ksmbd_file *fp, loff_t size);
+struct srv_copychunk;
+int ksmbd_vfs_copy_file_ranges(struct ksmbd_work *work,
+ struct ksmbd_file *src_fp,
+ struct ksmbd_file *dst_fp,
+ struct srv_copychunk *chunks,
+ unsigned int chunk_count,
+ unsigned int *chunk_count_written,
+ unsigned int *chunk_size_written,
+ loff_t *total_size_written);
+int ksmbd_vfs_copy_file_range(struct file *file_in, loff_t pos_in,
+ struct file *file_out, loff_t pos_out,
+ size_t len);
+ssize_t ksmbd_vfs_listxattr(struct dentry *dentry, char **list);
+ssize_t ksmbd_vfs_getxattr(struct dentry *dentry, char *xattr_name,
+ char **xattr_buf);
+ssize_t ksmbd_vfs_casexattr_len(struct dentry *dentry, char *attr_name,
+ int attr_name_len);
+int ksmbd_vfs_setxattr(struct dentry *dentry, const char *attr_name,
+ const void *attr_value, size_t attr_size, int flags);
+int ksmbd_vfs_xattr_stream_name(char *stream_name, char **xattr_stream_name,
+ size_t *xattr_stream_name_size, int s_type);
+int ksmbd_vfs_remove_xattr(struct dentry *dentry, char *attr_name);
+int ksmbd_vfs_kern_path(char *name, unsigned int flags, struct path *path,
+ bool caseless);
+int ksmbd_vfs_empty_dir(struct ksmbd_file *fp);
+void ksmbd_vfs_set_fadvise(struct file *filp, __le32 option);
+int ksmbd_vfs_lock(struct file *filp, int cmd, struct file_lock *flock);
+int ksmbd_vfs_readdir(struct file *file, struct ksmbd_readdir_data *rdata);
+int ksmbd_vfs_alloc_size(struct ksmbd_work *work, struct ksmbd_file *fp,
+ loff_t len);
+int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp,
+ loff_t off, loff_t len);
+struct file_allocated_range_buffer;
+int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length,
+ struct file_allocated_range_buffer *ranges,
+ int in_count, int *out_count);
+int ksmbd_vfs_unlink(struct dentry *dir, struct dentry *dentry);
+unsigned short ksmbd_vfs_logical_sector_size(struct inode *inode);
+void ksmbd_vfs_smb2_sector_size(struct inode *inode,
+ struct ksmbd_fs_sector_size *fs_ss);
+void *ksmbd_vfs_init_kstat(char **p, struct ksmbd_kstat *ksmbd_kstat);
+int ksmbd_vfs_fill_dentry_attrs(struct ksmbd_work *work, struct dentry *dentry,
+ struct ksmbd_kstat *ksmbd_kstat);
+int ksmbd_vfs_posix_lock_wait(struct file_lock *flock);
+int ksmbd_vfs_posix_lock_wait_timeout(struct file_lock *flock, long timeout);
+void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock);
+int ksmbd_vfs_remove_acl_xattrs(struct dentry *dentry);
+int ksmbd_vfs_remove_sd_xattrs(struct dentry *dentry);
+int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn, struct dentry *dentry,
+ struct smb_ntsd *pntsd, int len);
+int ksmbd_vfs_get_sd_xattr(struct ksmbd_conn *conn, struct dentry *dentry,
+ struct smb_ntsd **pntsd);
+int ksmbd_vfs_set_dos_attrib_xattr(struct dentry *dentry,
+ struct xattr_dos_attrib *da);
+int ksmbd_vfs_get_dos_attrib_xattr(struct dentry *dentry,
+ struct xattr_dos_attrib *da);
+struct posix_acl *ksmbd_vfs_posix_acl_alloc(int count, gfp_t flags);
+struct posix_acl *ksmbd_vfs_get_acl(struct inode *inode, int type);
+int ksmbd_vfs_set_posix_acl(struct inode *inode, int type,
+ struct posix_acl *acl);
+int ksmbd_vfs_set_init_posix_acl(struct inode *inode);
+int ksmbd_vfs_inherit_posix_acl(struct inode *inode,
+ struct inode *parent_inode);
+#endif /* __KSMBD_VFS_H__ */
diff --git a/fs/cifsd/vfs_cache.c b/fs/cifsd/vfs_cache.c
new file mode 100644
index 000000000000..6ea09fe82814
--- /dev/null
+++ b/fs/cifsd/vfs_cache.c
@@ -0,0 +1,685 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
+ * Copyright (C) 2019 Samsung Electronics Co., Ltd.
+ */
+
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+#include "glob.h"
+#include "vfs_cache.h"
+#include "buffer_pool.h"
+#include "oplock.h"
+#include "vfs.h"
+#include "connection.h"
+#include "mgmt/tree_connect.h"
+#include "mgmt/user_session.h"
+#include "smb_common.h"
+
+#define S_DEL_PENDING 1
+#define S_DEL_ON_CLS 2
+#define S_DEL_ON_CLS_STREAM 8
+
+static unsigned int inode_hash_mask __read_mostly;
+static unsigned int inode_hash_shift __read_mostly;
+static struct hlist_head *inode_hashtable __read_mostly;
+static DEFINE_RWLOCK(inode_hash_lock);
+
+static struct ksmbd_file_table global_ft;
+static atomic_long_t fd_limit;
+
+void ksmbd_set_fd_limit(unsigned long limit)
+{
+ limit = min(limit, get_max_files());
+ atomic_long_set(&fd_limit, limit);
+}
+
+static bool fd_limit_depleted(void)
+{
+ long v = atomic_long_dec_return(&fd_limit);
+
+ if (v >= 0)
+ return false;
+ atomic_long_inc(&fd_limit);
+ return true;
+}
+
+static void fd_limit_close(void)
+{
+ atomic_long_inc(&fd_limit);
+}
+
+/*
+ * INODE hash
+ */
+
+static unsigned long inode_hash(struct super_block *sb, unsigned long hashval)
+{
+ unsigned long tmp;
+
+ tmp = (hashval * (unsigned long)sb) ^ (GOLDEN_RATIO_PRIME + hashval) /
+ L1_CACHE_BYTES;
+ tmp = tmp ^ ((tmp ^ GOLDEN_RATIO_PRIME) >> inode_hash_shift);
+ return tmp & inode_hash_mask;
+}
+
+static struct ksmbd_inode *__ksmbd_inode_lookup(struct inode *inode)
+{
+ struct hlist_head *head = inode_hashtable +
+ inode_hash(inode->i_sb, inode->i_ino);
+ struct ksmbd_inode *ci = NULL, *ret_ci = NULL;
+
+ hlist_for_each_entry(ci, head, m_hash) {
+ if (ci->m_inode == inode) {
+ if (atomic_inc_not_zero(&ci->m_count))
+ ret_ci = ci;
+ break;
+ }
+ }
+ return ret_ci;
+}
+
+static struct ksmbd_inode *ksmbd_inode_lookup(struct ksmbd_file *fp)
+{
+ return __ksmbd_inode_lookup(FP_INODE(fp));
+}
+
+static struct ksmbd_inode *ksmbd_inode_lookup_by_vfsinode(struct inode *inode)
+{
+ struct ksmbd_inode *ci;
+
+ read_lock(&inode_hash_lock);
+ ci = __ksmbd_inode_lookup(inode);
+ read_unlock(&inode_hash_lock);
+ return ci;
+}
+
+int ksmbd_query_inode_status(struct inode *inode)
+{
+ struct ksmbd_inode *ci;
+ int ret = KSMBD_INODE_STATUS_UNKNOWN;
+
+ read_lock(&inode_hash_lock);
+ ci = __ksmbd_inode_lookup(inode);
+ if (ci) {
+ ret = KSMBD_INODE_STATUS_OK;
+ if (ci->m_flags & S_DEL_PENDING)
+ ret = KSMBD_INODE_STATUS_PENDING_DELETE;
+ atomic_dec(&ci->m_count);
+ }
+ read_unlock(&inode_hash_lock);
+ return ret;
+}
+
+bool ksmbd_inode_pending_delete(struct ksmbd_file *fp)
+{
+ return (fp->f_ci->m_flags & S_DEL_PENDING);
+}
+
+void ksmbd_set_inode_pending_delete(struct ksmbd_file *fp)
+{
+ fp->f_ci->m_flags |= S_DEL_PENDING;
+}
+
+void ksmbd_clear_inode_pending_delete(struct ksmbd_file *fp)
+{
+ fp->f_ci->m_flags &= ~S_DEL_PENDING;
+}
+
+void ksmbd_fd_set_delete_on_close(struct ksmbd_file *fp,
+ int file_info)
+{
+ if (ksmbd_stream_fd(fp)) {
+ fp->f_ci->m_flags |= S_DEL_ON_CLS_STREAM;
+ return;
+ }
+
+ fp->f_ci->m_flags |= S_DEL_ON_CLS;
+}
+
+static void ksmbd_inode_hash(struct ksmbd_inode *ci)
+{
+ struct hlist_head *b = inode_hashtable +
+ inode_hash(ci->m_inode->i_sb, ci->m_inode->i_ino);
+
+ hlist_add_head(&ci->m_hash, b);
+}
+
+static void ksmbd_inode_unhash(struct ksmbd_inode *ci)
+{
+ write_lock(&inode_hash_lock);
+ hlist_del_init(&ci->m_hash);
+ write_unlock(&inode_hash_lock);
+}
+
+static int ksmbd_inode_init(struct ksmbd_inode *ci, struct ksmbd_file *fp)
+{
+ ci->m_inode = FP_INODE(fp);
+ atomic_set(&ci->m_count, 1);
+ atomic_set(&ci->op_count, 0);
+ atomic_set(&ci->sop_count, 0);
+ ci->m_flags = 0;
+ ci->m_fattr = 0;
+ INIT_LIST_HEAD(&ci->m_fp_list);
+ INIT_LIST_HEAD(&ci->m_op_list);
+ rwlock_init(&ci->m_lock);
+ return 0;
+}
+
+static struct ksmbd_inode *ksmbd_inode_get(struct ksmbd_file *fp)
+{
+ struct ksmbd_inode *ci, *tmpci;
+ int rc;
+
+ read_lock(&inode_hash_lock);
+ ci = ksmbd_inode_lookup(fp);
+ read_unlock(&inode_hash_lock);
+ if (ci)
+ return ci;
+
+ ci = kmalloc(sizeof(struct ksmbd_inode), GFP_KERNEL);
+ if (!ci)
+ return NULL;
+
+ rc = ksmbd_inode_init(ci, fp);
+ if (rc) {
+ ksmbd_err("inode initialized failed\n");
+ kfree(ci);
+ return NULL;
+ }
+
+ write_lock(&inode_hash_lock);
+ tmpci = ksmbd_inode_lookup(fp);
+ if (!tmpci) {
+ ksmbd_inode_hash(ci);
+ } else {
+ kfree(ci);
+ ci = tmpci;
+ }
+ write_unlock(&inode_hash_lock);
+ return ci;
+}
+
+static void ksmbd_inode_free(struct ksmbd_inode *ci)
+{
+ ksmbd_inode_unhash(ci);
+ kfree(ci);
+}
+
+static void ksmbd_inode_put(struct ksmbd_inode *ci)
+{
+ if (atomic_dec_and_test(&ci->m_count))
+ ksmbd_inode_free(ci);
+}
+
+int __init ksmbd_inode_hash_init(void)
+{
+ unsigned int loop;
+ unsigned long numentries = 16384;
+ unsigned long bucketsize = sizeof(struct hlist_head);
+ unsigned long size;
+
+ inode_hash_shift = ilog2(numentries);
+ inode_hash_mask = (1 << inode_hash_shift) - 1;
+
+ size = bucketsize << inode_hash_shift;
+
+ /* init master fp hash table */
+ inode_hashtable = vmalloc(size);
+ if (!inode_hashtable)
+ return -ENOMEM;
+
+ for (loop = 0; loop < (1U << inode_hash_shift); loop++)
+ INIT_HLIST_HEAD(&inode_hashtable[loop]);
+ return 0;
+}
+
+void ksmbd_release_inode_hash(void)
+{
+ vfree(inode_hashtable);
+}
+
+static void __ksmbd_inode_close(struct ksmbd_file *fp)
+{
+ struct dentry *dir, *dentry;
+ struct ksmbd_inode *ci = fp->f_ci;
+ int err;
+ struct file *filp;
+
+ filp = fp->filp;
+ if (ksmbd_stream_fd(fp) && (ci->m_flags & S_DEL_ON_CLS_STREAM)) {
+ ci->m_flags &= ~S_DEL_ON_CLS_STREAM;
+ err = ksmbd_vfs_remove_xattr(filp->f_path.dentry,
+ fp->stream.name);
+ if (err)
+ ksmbd_err("remove xattr failed : %s\n",
+ fp->stream.name);
+ }
+
+ if (atomic_dec_and_test(&ci->m_count)) {
+ write_lock(&ci->m_lock);
+ if (ci->m_flags & (S_DEL_ON_CLS | S_DEL_PENDING)) {
+ dentry = filp->f_path.dentry;
+ dir = dentry->d_parent;
+ ci->m_flags &= ~(S_DEL_ON_CLS | S_DEL_PENDING);
+ write_unlock(&ci->m_lock);
+ ksmbd_vfs_unlink(dir, dentry);
+ write_lock(&ci->m_lock);
+ }
+ write_unlock(&ci->m_lock);
+
+ ksmbd_inode_free(ci);
+ }
+}
+
+static void __ksmbd_remove_durable_fd(struct ksmbd_file *fp)
+{
+ if (!HAS_FILE_ID(fp->persistent_id))
+ return;
+
+ write_lock(&global_ft.lock);
+ idr_remove(global_ft.idr, fp->persistent_id);
+ write_unlock(&global_ft.lock);
+}
+
+static void __ksmbd_remove_fd(struct ksmbd_file_table *ft, struct ksmbd_file *fp)
+{
+ if (!HAS_FILE_ID(fp->volatile_id))
+ return;
+
+ write_lock(&fp->f_ci->m_lock);
+ list_del_init(&fp->node);
+ write_unlock(&fp->f_ci->m_lock);
+
+ write_lock(&ft->lock);
+ idr_remove(ft->idr, fp->volatile_id);
+ write_unlock(&ft->lock);
+}
+
+static void __ksmbd_close_fd(struct ksmbd_file_table *ft, struct ksmbd_file *fp)
+{
+ struct file *filp;
+
+ fd_limit_close();
+ __ksmbd_remove_durable_fd(fp);
+ __ksmbd_remove_fd(ft, fp);
+
+ close_id_del_oplock(fp);
+ filp = fp->filp;
+
+ __ksmbd_inode_close(fp);
+ if (!IS_ERR_OR_NULL(filp))
+ fput(filp);
+ kfree(fp->filename);
+ if (ksmbd_stream_fd(fp))
+ kfree(fp->stream.name);
+ ksmbd_free_file_struct(fp);
+}
+
+static struct ksmbd_file *ksmbd_fp_get(struct ksmbd_file *fp)
+{
+ if (!atomic_inc_not_zero(&fp->refcount))
+ return NULL;
+ return fp;
+}
+
+static struct ksmbd_file *__ksmbd_lookup_fd(struct ksmbd_file_table *ft,
+ unsigned int id)
+{
+ struct ksmbd_file *fp;
+
+ read_lock(&ft->lock);
+ fp = idr_find(ft->idr, id);
+ if (fp)
+ fp = ksmbd_fp_get(fp);
+ read_unlock(&ft->lock);
+ return fp;
+}
+
+static void __put_fd_final(struct ksmbd_work *work, struct ksmbd_file *fp)
+{
+ __ksmbd_close_fd(&work->sess->file_table, fp);
+ atomic_dec(&work->conn->stats.open_files_count);
+}
+
+static void set_close_state_blocked_works(struct ksmbd_file *fp)
+{
+ struct ksmbd_work *cancel_work, *ctmp;
+
+ spin_lock(&fp->f_lock);
+ list_for_each_entry_safe(cancel_work, ctmp, &fp->blocked_works,
+ fp_entry) {
+ list_del(&cancel_work->fp_entry);
+ cancel_work->state = KSMBD_WORK_CLOSED;
+ cancel_work->cancel_fn(cancel_work->cancel_argv);
+ }
+ spin_unlock(&fp->f_lock);
+}
+
+int ksmbd_close_fd(struct ksmbd_work *work, unsigned int id)
+{
+ struct ksmbd_file *fp;
+ struct ksmbd_file_table *ft;
+
+ if (!HAS_FILE_ID(id))
+ return 0;
+
+ ft = &work->sess->file_table;
+ read_lock(&ft->lock);
+ fp = idr_find(ft->idr, id);
+ if (fp) {
+ set_close_state_blocked_works(fp);
+
+ if (!atomic_dec_and_test(&fp->refcount))
+ fp = NULL;
+ }
+ read_unlock(&ft->lock);
+
+ if (!fp)
+ return -EINVAL;
+
+ __put_fd_final(work, fp);
+ return 0;
+}
+
+void ksmbd_fd_put(struct ksmbd_work *work, struct ksmbd_file *fp)
+{
+ if (!fp)
+ return;
+
+ if (!atomic_dec_and_test(&fp->refcount))
+ return;
+ __put_fd_final(work, fp);
+}
+
+static bool __sanity_check(struct ksmbd_tree_connect *tcon, struct ksmbd_file *fp)
+{
+ if (!fp)
+ return false;
+ if (fp->tcon != tcon)
+ return false;
+ return true;
+}
+
+struct ksmbd_file *ksmbd_lookup_foreign_fd(struct ksmbd_work *work, unsigned int id)
+{
+ return __ksmbd_lookup_fd(&work->sess->file_table, id);
+}
+
+struct ksmbd_file *ksmbd_lookup_fd_fast(struct ksmbd_work *work, unsigned int id)
+{
+ struct ksmbd_file *fp = __ksmbd_lookup_fd(&work->sess->file_table, id);
+
+ if (__sanity_check(work->tcon, fp))
+ return fp;
+
+ ksmbd_fd_put(work, fp);
+ return NULL;
+}
+
+struct ksmbd_file *ksmbd_lookup_fd_slow(struct ksmbd_work *work, unsigned int id,
+ unsigned int pid)
+{
+ struct ksmbd_file *fp;
+
+ if (!HAS_FILE_ID(id)) {
+ id = work->compound_fid;
+ pid = work->compound_pfid;
+ }
+
+ if (!HAS_FILE_ID(id))
+ return NULL;
+
+ fp = __ksmbd_lookup_fd(&work->sess->file_table, id);
+ if (!__sanity_check(work->tcon, fp)) {
+ ksmbd_fd_put(work, fp);
+ return NULL;
+ }
+ if (fp->persistent_id != pid) {
+ ksmbd_fd_put(work, fp);
+ return NULL;
+ }
+ return fp;
+}
+
+struct ksmbd_file *ksmbd_lookup_durable_fd(unsigned long long id)
+{
+ return __ksmbd_lookup_fd(&global_ft, id);
+}
+
+struct ksmbd_file *ksmbd_lookup_fd_cguid(char *cguid)
+{
+ struct ksmbd_file *fp = NULL;
+ unsigned int id;
+
+ read_lock(&global_ft.lock);
+ idr_for_each_entry(global_ft.idr, fp, id) {
+ if (!memcmp(fp->create_guid,
+ cguid,
+ SMB2_CREATE_GUID_SIZE)) {
+ fp = ksmbd_fp_get(fp);
+ break;
+ }
+ }
+ read_unlock(&global_ft.lock);
+
+ return fp;
+}
+
+struct ksmbd_file *ksmbd_lookup_fd_inode(struct inode *inode)
+{
+ struct ksmbd_file *lfp;
+ struct ksmbd_inode *ci;
+ struct list_head *cur;
+
+ ci = ksmbd_inode_lookup_by_vfsinode(inode);
+ if (!ci)
+ return NULL;
+
+ read_lock(&ci->m_lock);
+ list_for_each(cur, &ci->m_fp_list) {
+ lfp = list_entry(cur, struct ksmbd_file, node);
+ if (inode == FP_INODE(lfp)) {
+ atomic_dec(&ci->m_count);
+ read_unlock(&ci->m_lock);
+ return lfp;
+ }
+ }
+ atomic_dec(&ci->m_count);
+ read_unlock(&ci->m_lock);
+ return NULL;
+}
+
+#define OPEN_ID_TYPE_VOLATILE_ID (0)
+#define OPEN_ID_TYPE_PERSISTENT_ID (1)
+
+static void __open_id_set(struct ksmbd_file *fp, unsigned int id, int type)
+{
+ if (type == OPEN_ID_TYPE_VOLATILE_ID)
+ fp->volatile_id = id;
+ if (type == OPEN_ID_TYPE_PERSISTENT_ID)
+ fp->persistent_id = id;
+}
+
+static int __open_id(struct ksmbd_file_table *ft, struct ksmbd_file *fp,
+ int type)
+{
+ unsigned int id = 0;
+ int ret;
+
+ if (type == OPEN_ID_TYPE_VOLATILE_ID && fd_limit_depleted()) {
+ __open_id_set(fp, KSMBD_NO_FID, type);
+ return -EMFILE;
+ }
+
+ idr_preload(GFP_KERNEL);
+ write_lock(&ft->lock);
+ ret = idr_alloc_cyclic(ft->idr, fp, 0, INT_MAX, GFP_NOWAIT);
+ if (ret >= 0) {
+ id = ret;
+ ret = 0;
+ } else {
+ id = KSMBD_NO_FID;
+ fd_limit_close();
+ }
+
+ __open_id_set(fp, id, type);
+ write_unlock(&ft->lock);
+ idr_preload_end();
+ return ret;
+}
+
+unsigned int ksmbd_open_durable_fd(struct ksmbd_file *fp)
+{
+ __open_id(&global_ft, fp, OPEN_ID_TYPE_PERSISTENT_ID);
+ return fp->persistent_id;
+}
+
+struct ksmbd_file *ksmbd_open_fd(struct ksmbd_work *work, struct file *filp)
+{
+ struct ksmbd_file *fp;
+ int ret;
+
+ fp = ksmbd_alloc_file_struct();
+ if (!fp) {
+ ksmbd_err("Failed to allocate memory\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ INIT_LIST_HEAD(&fp->blocked_works);
+ INIT_LIST_HEAD(&fp->node);
+ spin_lock_init(&fp->f_lock);
+ atomic_set(&fp->refcount, 1);
+
+ fp->filp = filp;
+ fp->conn = work->sess->conn;
+ fp->tcon = work->tcon;
+ fp->volatile_id = KSMBD_NO_FID;
+ fp->persistent_id = KSMBD_NO_FID;
+ fp->f_ci = ksmbd_inode_get(fp);
+
+ if (!fp->f_ci) {
+ ksmbd_free_file_struct(fp);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ ret = __open_id(&work->sess->file_table, fp, OPEN_ID_TYPE_VOLATILE_ID);
+ if (ret) {
+ ksmbd_inode_put(fp->f_ci);
+ ksmbd_free_file_struct(fp);
+ return ERR_PTR(ret);
+ }
+
+ atomic_inc(&work->conn->stats.open_files_count);
+ return fp;
+}
+
+static int
+__close_file_table_ids(struct ksmbd_file_table *ft,
+ struct ksmbd_tree_connect *tcon,
+ bool (*skip)(struct ksmbd_tree_connect *tcon,
+ struct ksmbd_file *fp))
+{
+ unsigned int id;
+ struct ksmbd_file *fp;
+ int num = 0;
+
+ idr_for_each_entry(ft->idr, fp, id) {
+ if (skip(tcon, fp))
+ continue;
+
+ set_close_state_blocked_works(fp);
+
+ if (!atomic_dec_and_test(&fp->refcount))
+ continue;
+ __ksmbd_close_fd(ft, fp);
+ num++;
+ }
+ return num;
+}
+
+static bool tree_conn_fd_check(struct ksmbd_tree_connect *tcon, struct ksmbd_file *fp)
+{
+ return fp->tcon != tcon;
+}
+
+static bool session_fd_check(struct ksmbd_tree_connect *tcon, struct ksmbd_file *fp)
+{
+ return false;
+}
+
+void ksmbd_close_tree_conn_fds(struct ksmbd_work *work)
+{
+ int num = __close_file_table_ids(&work->sess->file_table,
+ work->tcon,
+ tree_conn_fd_check);
+
+ atomic_sub(num, &work->conn->stats.open_files_count);
+}
+
+void ksmbd_close_session_fds(struct ksmbd_work *work)
+{
+ int num = __close_file_table_ids(&work->sess->file_table,
+ work->tcon,
+ session_fd_check);
+
+ atomic_sub(num, &work->conn->stats.open_files_count);
+}
+
+int ksmbd_init_global_file_table(void)
+{
+ return ksmbd_init_file_table(&global_ft);
+}
+
+void ksmbd_free_global_file_table(void)
+{
+ struct ksmbd_file *fp = NULL;
+ unsigned int id;
+
+ idr_for_each_entry(global_ft.idr, fp, id) {
+ __ksmbd_remove_durable_fd(fp);
+ ksmbd_free_file_struct(fp);
+ }
+
+ ksmbd_destroy_file_table(&global_ft);
+}
+
+int ksmbd_file_table_flush(struct ksmbd_work *work)
+{
+ struct ksmbd_file *fp = NULL;
+ unsigned int id;
+ int ret;
+
+ read_lock(&work->sess->file_table.lock);
+ idr_for_each_entry(work->sess->file_table.idr, fp, id) {
+ ret = ksmbd_vfs_fsync(work, fp->volatile_id, KSMBD_NO_FID);
+ if (ret)
+ break;
+ }
+ read_unlock(&work->sess->file_table.lock);
+ return ret;
+}
+
+int ksmbd_init_file_table(struct ksmbd_file_table *ft)
+{
+ ft->idr = kzalloc(sizeof(struct idr), GFP_KERNEL);
+ if (!ft->idr)
+ return -ENOMEM;
+
+ idr_init(ft->idr);
+ rwlock_init(&ft->lock);
+ return 0;
+}
+
+void ksmbd_destroy_file_table(struct ksmbd_file_table *ft)
+{
+ if (!ft->idr)
+ return;
+
+ __close_file_table_ids(ft, NULL, session_fd_check);
+ idr_destroy(ft->idr);
+ kfree(ft->idr);
+ ft->idr = NULL;
+}
diff --git a/fs/cifsd/vfs_cache.h b/fs/cifsd/vfs_cache.h
new file mode 100644
index 000000000000..635eedbd497c
--- /dev/null
+++ b/fs/cifsd/vfs_cache.h
@@ -0,0 +1,185 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019 Samsung Electronics Co., Ltd.
+ */
+
+#ifndef __VFS_CACHE_H__
+#define __VFS_CACHE_H__
+
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/rwsem.h>
+#include <linux/spinlock.h>
+#include <linux/idr.h>
+#include <linux/workqueue.h>
+
+#include "vfs.h"
+
+/* Windows style file permissions for extended response */
+#define FILE_GENERIC_ALL 0x1F01FF
+#define FILE_GENERIC_READ 0x120089
+#define FILE_GENERIC_WRITE 0x120116
+#define FILE_GENERIC_EXECUTE 0X1200a0
+
+#define KSMBD_START_FID 0
+#define KSMBD_NO_FID (UINT_MAX)
+#define SMB2_NO_FID (0xFFFFFFFFFFFFFFFFULL)
+
+#define FP_FILENAME(fp) ((fp)->filp->f_path.dentry->d_name.name)
+#define FP_INODE(fp) d_inode((fp)->filp->f_path.dentry)
+#define PARENT_INODE(fp) d_inode((fp)->filp->f_path.dentry->d_parent)
+
+#define ATTR_FP(fp) ((fp)->attrib_only && \
+ ((fp)->cdoption != FILE_OVERWRITE_IF_LE && \
+ (fp)->cdoption != FILE_OVERWRITE_LE && \
+ (fp)->cdoption != FILE_SUPERSEDE_LE))
+
+struct ksmbd_conn;
+struct ksmbd_session;
+
+struct ksmbd_lock {
+ struct file_lock *fl;
+ struct list_head glist;
+ struct list_head llist;
+ unsigned int flags;
+ int cmd;
+ int zero_len;
+ unsigned long long start;
+ unsigned long long end;
+};
+
+struct stream {
+ char *name;
+ ssize_t size;
+};
+
+struct ksmbd_inode {
+ rwlock_t m_lock;
+ atomic_t m_count;
+ atomic_t op_count;
+ /* opinfo count for streams */
+ atomic_t sop_count;
+ struct inode *m_inode;
+ unsigned int m_flags;
+ struct hlist_node m_hash;
+ struct list_head m_fp_list;
+ struct list_head m_op_list;
+ struct oplock_info *m_opinfo;
+ __le32 m_fattr;
+};
+
+struct ksmbd_file {
+ struct file *filp;
+ char *filename;
+ unsigned int persistent_id;
+ unsigned int volatile_id;
+
+ spinlock_t f_lock;
+
+ struct ksmbd_inode *f_ci;
+ struct ksmbd_inode *f_parent_ci;
+ struct oplock_info __rcu *f_opinfo;
+ struct ksmbd_conn *conn;
+ struct ksmbd_tree_connect *tcon;
+
+ atomic_t refcount;
+ __le32 daccess;
+ __le32 saccess;
+ __le32 coption;
+ __le32 cdoption;
+ __u64 create_time;
+ __u64 itime;
+
+ bool is_nt_open;
+ bool attrib_only;
+
+ char client_guid[16];
+ char create_guid[16];
+ char app_instance_id[16];
+
+ struct stream stream;
+ struct list_head node;
+ struct list_head blocked_works;
+
+ int durable_timeout;
+
+ /* for SMB1 */
+ int pid;
+
+ /* conflict lock fail count for SMB1 */
+ unsigned int cflock_cnt;
+ /* last lock failure start offset for SMB1 */
+ unsigned long long llock_fstart;
+
+ int dirent_offset;
+
+ /* if ls is happening on directory, below is valid*/
+ struct ksmbd_readdir_data readdir_data;
+ int dot_dotdot[2];
+};
+
+static inline void set_ctx_actor(struct dir_context *ctx,
+ filldir_t actor)
+{
+ ctx->actor = actor;
+}
+
+#define KSMBD_NR_OPEN_DEFAULT BITS_PER_LONG
+
+struct ksmbd_file_table {
+ rwlock_t lock;
+ struct idr *idr;
+};
+
+static inline bool HAS_FILE_ID(unsigned long long req)
+{
+ unsigned int id = (unsigned int)req;
+
+ return id < KSMBD_NO_FID;
+}
+
+static inline bool ksmbd_stream_fd(struct ksmbd_file *fp)
+{
+ return fp->stream.name != NULL;
+}
+
+int ksmbd_init_file_table(struct ksmbd_file_table *ft);
+void ksmbd_destroy_file_table(struct ksmbd_file_table *ft);
+int ksmbd_close_fd(struct ksmbd_work *work, unsigned int id);
+struct ksmbd_file *ksmbd_lookup_fd_fast(struct ksmbd_work *work, unsigned int id);
+struct ksmbd_file *ksmbd_lookup_foreign_fd(struct ksmbd_work *work, unsigned int id);
+struct ksmbd_file *ksmbd_lookup_fd_slow(struct ksmbd_work *work, unsigned int id,
+ unsigned int pid);
+void ksmbd_fd_put(struct ksmbd_work *work, struct ksmbd_file *fp);
+struct ksmbd_file *ksmbd_lookup_durable_fd(unsigned long long id);
+struct ksmbd_file *ksmbd_lookup_fd_cguid(char *cguid);
+struct ksmbd_file *ksmbd_lookup_fd_inode(struct inode *inode);
+unsigned int ksmbd_open_durable_fd(struct ksmbd_file *fp);
+struct ksmbd_file *ksmbd_open_fd(struct ksmbd_work *work, struct file *filp);
+void ksmbd_close_tree_conn_fds(struct ksmbd_work *work);
+void ksmbd_close_session_fds(struct ksmbd_work *work);
+int ksmbd_close_inode_fds(struct ksmbd_work *work, struct inode *inode);
+int ksmbd_init_global_file_table(void);
+void ksmbd_free_global_file_table(void);
+int ksmbd_file_table_flush(struct ksmbd_work *work);
+void ksmbd_set_fd_limit(unsigned long limit);
+
+/*
+ * INODE hash
+ */
+int __init ksmbd_inode_hash_init(void);
+void ksmbd_release_inode_hash(void);
+
+enum KSMBD_INODE_STATUS {
+ KSMBD_INODE_STATUS_OK,
+ KSMBD_INODE_STATUS_UNKNOWN,
+ KSMBD_INODE_STATUS_PENDING_DELETE,
+};
+
+int ksmbd_query_inode_status(struct inode *inode);
+bool ksmbd_inode_pending_delete(struct ksmbd_file *fp);
+void ksmbd_set_inode_pending_delete(struct ksmbd_file *fp);
+void ksmbd_clear_inode_pending_delete(struct ksmbd_file *fp);
+void ksmbd_fd_set_delete_on_close(struct ksmbd_file *fp,
+ int file_info);
+#endif /* __VFS_CACHE_H__ */
--
2.17.1