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-rw-r--r--fs/cifs/ioctl.c526
1 files changed, 0 insertions, 526 deletions
diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c
deleted file mode 100644
index 6419ec47c2a8..000000000000
--- a/fs/cifs/ioctl.c
+++ /dev/null
@@ -1,526 +0,0 @@
-// SPDX-License-Identifier: LGPL-2.1
-/*
- *
- * vfs operations that deal with io control
- *
- * Copyright (C) International Business Machines Corp., 2005,2013
- * Author(s): Steve French (sfrench@us.ibm.com)
- *
- */
-
-#include <linux/fs.h>
-#include <linux/file.h>
-#include <linux/mount.h>
-#include <linux/mm.h>
-#include <linux/pagemap.h>
-#include "cifspdu.h"
-#include "cifsglob.h"
-#include "cifsproto.h"
-#include "cifs_debug.h"
-#include "cifsfs.h"
-#include "cifs_ioctl.h"
-#include "smb2proto.h"
-#include "smb2glob.h"
-#include <linux/btrfs.h>
-
-static long cifs_ioctl_query_info(unsigned int xid, struct file *filep,
- unsigned long p)
-{
- struct inode *inode = file_inode(filep);
- struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
- struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
- struct dentry *dentry = filep->f_path.dentry;
- const unsigned char *path;
- void *page = alloc_dentry_path();
- __le16 *utf16_path = NULL, root_path;
- int rc = 0;
-
- path = build_path_from_dentry(dentry, page);
- if (IS_ERR(path)) {
- free_dentry_path(page);
- return PTR_ERR(path);
- }
-
- cifs_dbg(FYI, "%s %s\n", __func__, path);
-
- if (!path[0]) {
- root_path = 0;
- utf16_path = &root_path;
- } else {
- utf16_path = cifs_convert_path_to_utf16(path + 1, cifs_sb);
- if (!utf16_path) {
- rc = -ENOMEM;
- goto ici_exit;
- }
- }
-
- if (tcon->ses->server->ops->ioctl_query_info)
- rc = tcon->ses->server->ops->ioctl_query_info(
- xid, tcon, cifs_sb, utf16_path,
- filep->private_data ? 0 : 1, p);
- else
- rc = -EOPNOTSUPP;
-
- ici_exit:
- if (utf16_path != &root_path)
- kfree(utf16_path);
- free_dentry_path(page);
- return rc;
-}
-
-static long cifs_ioctl_copychunk(unsigned int xid, struct file *dst_file,
- unsigned long srcfd)
-{
- int rc;
- struct fd src_file;
- struct inode *src_inode;
-
- cifs_dbg(FYI, "ioctl copychunk range\n");
- /* the destination must be opened for writing */
- if (!(dst_file->f_mode & FMODE_WRITE)) {
- cifs_dbg(FYI, "file target not open for write\n");
- return -EINVAL;
- }
-
- /* check if target volume is readonly and take reference */
- rc = mnt_want_write_file(dst_file);
- if (rc) {
- cifs_dbg(FYI, "mnt_want_write failed with rc %d\n", rc);
- return rc;
- }
-
- src_file = fdget(srcfd);
- if (!src_file.file) {
- rc = -EBADF;
- goto out_drop_write;
- }
-
- if (src_file.file->f_op->unlocked_ioctl != cifs_ioctl) {
- rc = -EBADF;
- cifs_dbg(VFS, "src file seems to be from a different filesystem type\n");
- goto out_fput;
- }
-
- src_inode = file_inode(src_file.file);
- rc = -EINVAL;
- if (S_ISDIR(src_inode->i_mode))
- goto out_fput;
-
- rc = cifs_file_copychunk_range(xid, src_file.file, 0, dst_file, 0,
- src_inode->i_size, 0);
- if (rc > 0)
- rc = 0;
-out_fput:
- fdput(src_file);
-out_drop_write:
- mnt_drop_write_file(dst_file);
- return rc;
-}
-
-static long smb_mnt_get_fsinfo(unsigned int xid, struct cifs_tcon *tcon,
- void __user *arg)
-{
- int rc = 0;
- struct smb_mnt_fs_info *fsinf;
-
- fsinf = kzalloc(sizeof(struct smb_mnt_fs_info), GFP_KERNEL);
- if (fsinf == NULL)
- return -ENOMEM;
-
- fsinf->version = 1;
- fsinf->protocol_id = tcon->ses->server->vals->protocol_id;
- fsinf->device_characteristics =
- le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics);
- fsinf->device_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
- fsinf->fs_attributes = le32_to_cpu(tcon->fsAttrInfo.Attributes);
- fsinf->max_path_component =
- le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength);
- fsinf->vol_serial_number = tcon->vol_serial_number;
- fsinf->vol_create_time = le64_to_cpu(tcon->vol_create_time);
- fsinf->share_flags = tcon->share_flags;
- fsinf->share_caps = le32_to_cpu(tcon->capabilities);
- fsinf->sector_flags = tcon->ss_flags;
- fsinf->optimal_sector_size = tcon->perf_sector_size;
- fsinf->max_bytes_chunk = tcon->max_bytes_chunk;
- fsinf->maximal_access = tcon->maximal_access;
- fsinf->cifs_posix_caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
-
- if (copy_to_user(arg, fsinf, sizeof(struct smb_mnt_fs_info)))
- rc = -EFAULT;
-
- kfree(fsinf);
- return rc;
-}
-
-static int cifs_shutdown(struct super_block *sb, unsigned long arg)
-{
- struct cifs_sb_info *sbi = CIFS_SB(sb);
- __u32 flags;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
- if (get_user(flags, (__u32 __user *)arg))
- return -EFAULT;
-
- if (flags > CIFS_GOING_FLAGS_NOLOGFLUSH)
- return -EINVAL;
-
- if (cifs_forced_shutdown(sbi))
- return 0;
-
- cifs_dbg(VFS, "shut down requested (%d)", flags);
-/* trace_cifs_shutdown(sb, flags);*/
-
- /*
- * see:
- * https://man7.org/linux/man-pages/man2/ioctl_xfs_goingdown.2.html
- * for more information and description of original intent of the flags
- */
- switch (flags) {
- /*
- * We could add support later for default flag which requires:
- * "Flush all dirty data and metadata to disk"
- * would need to call syncfs or equivalent to flush page cache for
- * the mount and then issue fsync to server (if nostrictsync not set)
- */
- case CIFS_GOING_FLAGS_DEFAULT:
- cifs_dbg(FYI, "shutdown with default flag not supported\n");
- return -EINVAL;
- /*
- * FLAGS_LOGFLUSH is easy since it asks to write out metadata (not
- * data) but metadata writes are not cached on the client, so can treat
- * it similarly to NOLOGFLUSH
- */
- case CIFS_GOING_FLAGS_LOGFLUSH:
- case CIFS_GOING_FLAGS_NOLOGFLUSH:
- sbi->mnt_cifs_flags |= CIFS_MOUNT_SHUTDOWN;
- return 0;
- default:
- return -EINVAL;
- }
- return 0;
-}
-
-static int cifs_dump_full_key(struct cifs_tcon *tcon, struct smb3_full_key_debug_info __user *in)
-{
- struct smb3_full_key_debug_info out;
- struct cifs_ses *ses;
- int rc = 0;
- bool found = false;
- u8 __user *end;
-
- if (!smb3_encryption_required(tcon)) {
- rc = -EOPNOTSUPP;
- goto out;
- }
-
- /* copy user input into our output buffer */
- if (copy_from_user(&out, in, sizeof(out))) {
- rc = -EINVAL;
- goto out;
- }
-
- if (!out.session_id) {
- /* if ses id is 0, use current user session */
- ses = tcon->ses;
- } else {
- /* otherwise if a session id is given, look for it in all our sessions */
- struct cifs_ses *ses_it = NULL;
- struct TCP_Server_Info *server_it = NULL;
-
- spin_lock(&cifs_tcp_ses_lock);
- list_for_each_entry(server_it, &cifs_tcp_ses_list, tcp_ses_list) {
- list_for_each_entry(ses_it, &server_it->smb_ses_list, smb_ses_list) {
- if (ses_it->Suid == out.session_id) {
- ses = ses_it;
- /*
- * since we are using the session outside the crit
- * section, we need to make sure it won't be released
- * so increment its refcount
- */
- ses->ses_count++;
- found = true;
- goto search_end;
- }
- }
- }
-search_end:
- spin_unlock(&cifs_tcp_ses_lock);
- if (!found) {
- rc = -ENOENT;
- goto out;
- }
- }
-
- switch (ses->server->cipher_type) {
- case SMB2_ENCRYPTION_AES128_CCM:
- case SMB2_ENCRYPTION_AES128_GCM:
- out.session_key_length = CIFS_SESS_KEY_SIZE;
- out.server_in_key_length = out.server_out_key_length = SMB3_GCM128_CRYPTKEY_SIZE;
- break;
- case SMB2_ENCRYPTION_AES256_CCM:
- case SMB2_ENCRYPTION_AES256_GCM:
- out.session_key_length = CIFS_SESS_KEY_SIZE;
- out.server_in_key_length = out.server_out_key_length = SMB3_GCM256_CRYPTKEY_SIZE;
- break;
- default:
- rc = -EOPNOTSUPP;
- goto out;
- }
-
- /* check if user buffer is big enough to store all the keys */
- if (out.in_size < sizeof(out) + out.session_key_length + out.server_in_key_length
- + out.server_out_key_length) {
- rc = -ENOBUFS;
- goto out;
- }
-
- out.session_id = ses->Suid;
- out.cipher_type = le16_to_cpu(ses->server->cipher_type);
-
- /* overwrite user input with our output */
- if (copy_to_user(in, &out, sizeof(out))) {
- rc = -EINVAL;
- goto out;
- }
-
- /* append all the keys at the end of the user buffer */
- end = in->data;
- if (copy_to_user(end, ses->auth_key.response, out.session_key_length)) {
- rc = -EINVAL;
- goto out;
- }
- end += out.session_key_length;
-
- if (copy_to_user(end, ses->smb3encryptionkey, out.server_in_key_length)) {
- rc = -EINVAL;
- goto out;
- }
- end += out.server_in_key_length;
-
- if (copy_to_user(end, ses->smb3decryptionkey, out.server_out_key_length)) {
- rc = -EINVAL;
- goto out;
- }
-
-out:
- if (found)
- cifs_put_smb_ses(ses);
- return rc;
-}
-
-long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
-{
- struct inode *inode = file_inode(filep);
- struct smb3_key_debug_info pkey_inf;
- int rc = -ENOTTY; /* strange error - but the precedent */
- unsigned int xid;
- struct cifsFileInfo *pSMBFile = filep->private_data;
- struct cifs_tcon *tcon;
- struct tcon_link *tlink;
- struct cifs_sb_info *cifs_sb;
- __u64 ExtAttrBits = 0;
- __u64 caps;
-
- xid = get_xid();
-
- cifs_dbg(FYI, "cifs ioctl 0x%x\n", command);
- switch (command) {
- case FS_IOC_GETFLAGS:
- if (pSMBFile == NULL)
- break;
- tcon = tlink_tcon(pSMBFile->tlink);
- caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
-#ifdef CONFIG_CIFS_POSIX
-#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
- if (CIFS_UNIX_EXTATTR_CAP & caps) {
- __u64 ExtAttrMask = 0;
- rc = CIFSGetExtAttr(xid, tcon,
- pSMBFile->fid.netfid,
- &ExtAttrBits, &ExtAttrMask);
- if (rc == 0)
- rc = put_user(ExtAttrBits &
- FS_FL_USER_VISIBLE,
- (int __user *)arg);
- if (rc != -EOPNOTSUPP)
- break;
- }
-#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
-#endif /* CONFIG_CIFS_POSIX */
- rc = 0;
- if (CIFS_I(inode)->cifsAttrs & ATTR_COMPRESSED) {
- /* add in the compressed bit */
- ExtAttrBits = FS_COMPR_FL;
- rc = put_user(ExtAttrBits & FS_FL_USER_VISIBLE,
- (int __user *)arg);
- }
- break;
- case FS_IOC_SETFLAGS:
- if (pSMBFile == NULL)
- break;
- tcon = tlink_tcon(pSMBFile->tlink);
- /* caps = le64_to_cpu(tcon->fsUnixInfo.Capability); */
-
- if (get_user(ExtAttrBits, (int __user *)arg)) {
- rc = -EFAULT;
- break;
- }
-
- /*
- * if (CIFS_UNIX_EXTATTR_CAP & caps)
- * rc = CIFSSetExtAttr(xid, tcon,
- * pSMBFile->fid.netfid,
- * extAttrBits,
- * &ExtAttrMask);
- * if (rc != -EOPNOTSUPP)
- * break;
- */
-
- /* Currently only flag we can set is compressed flag */
- if ((ExtAttrBits & FS_COMPR_FL) == 0)
- break;
-
- /* Try to set compress flag */
- if (tcon->ses->server->ops->set_compression) {
- rc = tcon->ses->server->ops->set_compression(
- xid, tcon, pSMBFile);
- cifs_dbg(FYI, "set compress flag rc %d\n", rc);
- }
- break;
- case CIFS_IOC_COPYCHUNK_FILE:
- rc = cifs_ioctl_copychunk(xid, filep, arg);
- break;
- case CIFS_QUERY_INFO:
- rc = cifs_ioctl_query_info(xid, filep, arg);
- break;
- case CIFS_IOC_SET_INTEGRITY:
- if (pSMBFile == NULL)
- break;
- tcon = tlink_tcon(pSMBFile->tlink);
- if (tcon->ses->server->ops->set_integrity)
- rc = tcon->ses->server->ops->set_integrity(xid,
- tcon, pSMBFile);
- else
- rc = -EOPNOTSUPP;
- break;
- case CIFS_IOC_GET_MNT_INFO:
- if (pSMBFile == NULL)
- break;
- tcon = tlink_tcon(pSMBFile->tlink);
- rc = smb_mnt_get_fsinfo(xid, tcon, (void __user *)arg);
- break;
- case CIFS_ENUMERATE_SNAPSHOTS:
- if (pSMBFile == NULL)
- break;
- if (arg == 0) {
- rc = -EINVAL;
- goto cifs_ioc_exit;
- }
- tcon = tlink_tcon(pSMBFile->tlink);
- if (tcon->ses->server->ops->enum_snapshots)
- rc = tcon->ses->server->ops->enum_snapshots(xid, tcon,
- pSMBFile, (void __user *)arg);
- else
- rc = -EOPNOTSUPP;
- break;
- case CIFS_DUMP_KEY:
- /*
- * Dump encryption keys. This is an old ioctl that only
- * handles AES-128-{CCM,GCM}.
- */
- if (pSMBFile == NULL)
- break;
- if (!capable(CAP_SYS_ADMIN)) {
- rc = -EACCES;
- break;
- }
-
- tcon = tlink_tcon(pSMBFile->tlink);
- if (!smb3_encryption_required(tcon)) {
- rc = -EOPNOTSUPP;
- break;
- }
- pkey_inf.cipher_type =
- le16_to_cpu(tcon->ses->server->cipher_type);
- pkey_inf.Suid = tcon->ses->Suid;
- memcpy(pkey_inf.auth_key, tcon->ses->auth_key.response,
- 16 /* SMB2_NTLMV2_SESSKEY_SIZE */);
- memcpy(pkey_inf.smb3decryptionkey,
- tcon->ses->smb3decryptionkey, SMB3_SIGN_KEY_SIZE);
- memcpy(pkey_inf.smb3encryptionkey,
- tcon->ses->smb3encryptionkey, SMB3_SIGN_KEY_SIZE);
- if (copy_to_user((void __user *)arg, &pkey_inf,
- sizeof(struct smb3_key_debug_info)))
- rc = -EFAULT;
- else
- rc = 0;
- break;
- case CIFS_DUMP_FULL_KEY:
- /*
- * Dump encryption keys (handles any key sizes)
- */
- if (pSMBFile == NULL)
- break;
- if (!capable(CAP_SYS_ADMIN)) {
- rc = -EACCES;
- break;
- }
- tcon = tlink_tcon(pSMBFile->tlink);
- rc = cifs_dump_full_key(tcon, (void __user *)arg);
- break;
- case CIFS_IOC_NOTIFY:
- if (!S_ISDIR(inode->i_mode)) {
- /* Notify can only be done on directories */
- rc = -EOPNOTSUPP;
- break;
- }
- cifs_sb = CIFS_SB(inode->i_sb);
- tlink = cifs_sb_tlink(cifs_sb);
- if (IS_ERR(tlink)) {
- rc = PTR_ERR(tlink);
- break;
- }
- tcon = tlink_tcon(tlink);
- if (tcon && tcon->ses->server->ops->notify) {
- rc = tcon->ses->server->ops->notify(xid,
- filep, (void __user *)arg,
- false /* no ret data */);
- cifs_dbg(FYI, "ioctl notify rc %d\n", rc);
- } else
- rc = -EOPNOTSUPP;
- cifs_put_tlink(tlink);
- break;
- case CIFS_IOC_NOTIFY_INFO:
- if (!S_ISDIR(inode->i_mode)) {
- /* Notify can only be done on directories */
- rc = -EOPNOTSUPP;
- break;
- }
- cifs_sb = CIFS_SB(inode->i_sb);
- tlink = cifs_sb_tlink(cifs_sb);
- if (IS_ERR(tlink)) {
- rc = PTR_ERR(tlink);
- break;
- }
- tcon = tlink_tcon(tlink);
- if (tcon && tcon->ses->server->ops->notify) {
- rc = tcon->ses->server->ops->notify(xid,
- filep, (void __user *)arg,
- true /* return details */);
- cifs_dbg(FYI, "ioctl notify info rc %d\n", rc);
- } else
- rc = -EOPNOTSUPP;
- cifs_put_tlink(tlink);
- break;
- case CIFS_IOC_SHUTDOWN:
- rc = cifs_shutdown(inode->i_sb, arg);
- break;
- default:
- cifs_dbg(FYI, "unsupported ioctl\n");
- break;
- }
-cifs_ioc_exit:
- free_xid(xid);
- return rc;
-}
generated by cgit (git 2.34.1) at 2025-12-25 06:18:04 +0000