cifs: add support for ioctl on directories
We do not call cifs_open_file() for directories and thus we do not have a pSMBFile we can extract the FIDs from. Solve this by instead always using a compounded open/query/close for the passthrough ioctl. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Ronnie Sahlberg
Steve French
parent
3b7960cace
commit
8d8b26e584
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@ -33,6 +33,7 @@
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#define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
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#define SMB_PATH_MAX 260
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#define CIFS_PORT 445
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#define RFC1001_PORT 139
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@ -467,7 +468,8 @@ struct smb_version_operations {
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int (*next_header)(char *);
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/* ioctl passthrough for query_info */
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int (*ioctl_query_info)(const unsigned int xid,
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struct cifsFileInfo *file,
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struct cifs_tcon *tcon,
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__le16 *path, int is_dir,
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unsigned long p);
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};
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@ -32,24 +32,49 @@
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#include "cifs_debug.h"
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#include "cifsfs.h"
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#include "cifs_ioctl.h"
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#include "smb2proto.h"
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#include <linux/btrfs.h>
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static long cifs_ioctl_query_info(unsigned int xid, struct file *filep,
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unsigned long p)
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{
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struct cifsFileInfo *pSMBFile = filep->private_data;
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struct cifs_tcon *tcon;
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struct inode *inode = file_inode(filep);
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struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
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struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
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struct dentry *dentry = filep->f_path.dentry;
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unsigned char *path;
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__le16 *utf16_path = NULL, root_path;
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int rc = 0;
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cifs_dbg(FYI, "%s %p\n", __func__, pSMBFile);
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if (pSMBFile == NULL)
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return -EISDIR;
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tcon = tlink_tcon(pSMBFile->tlink);
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path = build_path_from_dentry(dentry);
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if (path == NULL)
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return -ENOMEM;
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cifs_dbg(FYI, "%s %s\n", __func__, path);
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if (!path[0]) {
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root_path = 0;
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utf16_path = &root_path;
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} else {
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utf16_path = cifs_convert_path_to_utf16(path + 1, cifs_sb);
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if (!utf16_path) {
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rc = -ENOMEM;
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goto ici_exit;
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}
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}
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if (tcon->ses->server->ops->ioctl_query_info)
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return tcon->ses->server->ops->ioctl_query_info(
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xid, pSMBFile, p);
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rc = tcon->ses->server->ops->ioctl_query_info(
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xid, tcon, utf16_path,
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filep->private_data ? 0 : 1, p);
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else
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return -EOPNOTSUPP;
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rc = -EOPNOTSUPP;
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ici_exit:
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if (utf16_path != &root_path)
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kfree(utf16_path);
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kfree(path);
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return rc;
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}
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static long cifs_ioctl_copychunk(unsigned int xid, struct file *dst_file,
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@ -1120,22 +1120,31 @@ req_res_key_exit:
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static int
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smb2_ioctl_query_info(const unsigned int xid,
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struct cifsFileInfo *file,
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struct cifs_tcon *tcon,
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__le16 *path, int is_dir,
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unsigned long p)
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{
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struct cifs_tcon *tcon = tlink_tcon(file->tlink);
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struct cifs_ses *ses = tcon->ses;
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char __user *arg = (char __user *)p;
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struct smb_query_info qi;
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struct smb_query_info __user *pqi;
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int rc = 0;
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int flags = 0;
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struct smb_rqst rqst;
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struct kvec iov[1];
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struct kvec rsp_iov;
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int resp_buftype = CIFS_NO_BUFFER;
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struct smb2_query_info_rsp *rsp = NULL;
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void *buffer;
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void *buffer = NULL;
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struct smb_rqst rqst[3];
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int resp_buftype[3];
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struct kvec rsp_iov[3];
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struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
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struct cifs_open_parms oparms;
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u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
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struct cifs_fid fid;
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struct kvec qi_iov[1];
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struct kvec close_iov[1];
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memset(rqst, 0, sizeof(rqst));
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resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
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memset(rsp_iov, 0, sizeof(rsp_iov));
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if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
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return -EFAULT;
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@ -1155,31 +1164,62 @@ smb2_ioctl_query_info(const unsigned int xid,
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if (copy_from_user(buffer, arg + sizeof(struct smb_query_info),
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qi.output_buffer_length)) {
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kfree(buffer);
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return -EFAULT;
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rc = -EFAULT;
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goto iqinf_exit;
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}
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memset(&rqst, 0, sizeof(struct smb_rqst));
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memset(&iov, 0, sizeof(iov));
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rqst.rq_iov = iov;
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rqst.rq_nvec = 1;
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/* Open */
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memset(&open_iov, 0, sizeof(open_iov));
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rqst[0].rq_iov = open_iov;
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rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
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rc = SMB2_query_info_init(tcon, &rqst, file->fid.persistent_fid,
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file->fid.volatile_fid,
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memset(&oparms, 0, sizeof(oparms));
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oparms.tcon = tcon;
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oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
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oparms.disposition = FILE_OPEN;
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if (is_dir)
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oparms.create_options = CREATE_NOT_FILE;
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else
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oparms.create_options = CREATE_NOT_DIR;
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oparms.fid = &fid;
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oparms.reconnect = false;
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rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path);
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if (rc)
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goto iqinf_exit;
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smb2_set_next_command(ses->server, &rqst[0]);
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/* Query */
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memset(&qi_iov, 0, sizeof(qi_iov));
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rqst[1].rq_iov = qi_iov;
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rqst[1].rq_nvec = 1;
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rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
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qi.file_info_class, qi.info_type,
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qi.additional_information,
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qi.input_buffer_length,
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qi.output_buffer_length, buffer);
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kfree(buffer);
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if (rc)
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goto iqinf_exit;
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smb2_set_next_command(ses->server, &rqst[1]);
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smb2_set_related(&rqst[1]);
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rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
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rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
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/* Close */
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memset(&close_iov, 0, sizeof(close_iov));
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rqst[2].rq_iov = close_iov;
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rqst[2].rq_nvec = 1;
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rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
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if (rc)
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goto iqinf_exit;
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smb2_set_related(&rqst[2]);
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rc = compound_send_recv(xid, ses, flags, 3, rqst,
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resp_buftype, rsp_iov);
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if (rc)
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goto iqinf_exit;
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pqi = (struct smb_query_info __user *)arg;
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rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
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if (le32_to_cpu(rsp->OutputBufferLength) < qi.input_buffer_length)
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qi.input_buffer_length = le32_to_cpu(rsp->OutputBufferLength);
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if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length,
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@ -1193,8 +1233,13 @@ smb2_ioctl_query_info(const unsigned int xid,
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}
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iqinf_exit:
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SMB2_query_info_free(&rqst);
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free_rsp_buf(resp_buftype, rsp);
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kfree(buffer);
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SMB2_open_free(&rqst[0]);
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SMB2_query_info_free(&rqst[1]);
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SMB2_close_free(&rqst[2]);
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free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
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free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
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free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
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return rc;
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}
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