1/* 2 * fs/cifs/smb2inode.c 3 * 4 * Copyright (C) International Business Machines Corp., 2002, 2011 5 * Etersoft, 2012 6 * Author(s): Pavel Shilovsky (pshilovsky@samba.org), 7 * Steve French (sfrench@us.ibm.com) 8 * 9 * This library is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU Lesser General Public License as published 11 * by the Free Software Foundation; either version 2.1 of the License, or 12 * (at your option) any later version. 13 * 14 * This library is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 17 * the GNU Lesser General Public License for more details. 18 * 19 * You should have received a copy of the GNU Lesser General Public License 20 * along with this library; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 */ 23#include <linux/fs.h> 24#include <linux/stat.h> 25#include <linux/slab.h> 26#include <linux/pagemap.h> 27#include <asm/div64.h> 28#include "cifsfs.h" 29#include "cifspdu.h" 30#include "cifsglob.h" 31#include "cifsproto.h" 32#include "cifs_debug.h" 33#include "cifs_fs_sb.h" 34#include "cifs_unicode.h" 35#include "fscache.h" 36#include "smb2glob.h" 37#include "smb2pdu.h" 38#include "smb2proto.h" 39 40static int 41smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon, 42 struct cifs_sb_info *cifs_sb, const char *full_path, 43 __u32 desired_access, __u32 create_disposition, 44 __u32 create_options, void *data, int command) 45{ 46 int rc, tmprc = 0; 47 __le16 *utf16_path; 48 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 49 struct cifs_open_parms oparms; 50 struct cifs_fid fid; 51 52 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 53 if (!utf16_path) 54 return -ENOMEM; 55 56 oparms.tcon = tcon; 57 oparms.desired_access = desired_access; 58 oparms.disposition = create_disposition; 59 oparms.create_options = create_options; 60 oparms.fid = &fid; 61 oparms.reconnect = false; 62 63 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL); 64 if (rc) { 65 kfree(utf16_path); 66 return rc; 67 } 68 69 switch (command) { 70 case SMB2_OP_DELETE: 71 break; 72 case SMB2_OP_QUERY_INFO: 73 tmprc = SMB2_query_info(xid, tcon, fid.persistent_fid, 74 fid.volatile_fid, 75 (struct smb2_file_all_info *)data); 76 break; 77 case SMB2_OP_MKDIR: 78 /* 79 * Directories are created through parameters in the 80 * SMB2_open() call. 81 */ 82 break; 83 case SMB2_OP_RMDIR: 84 tmprc = SMB2_rmdir(xid, tcon, fid.persistent_fid, 85 fid.volatile_fid); 86 break; 87 case SMB2_OP_RENAME: 88 tmprc = SMB2_rename(xid, tcon, fid.persistent_fid, 89 fid.volatile_fid, (__le16 *)data); 90 break; 91 case SMB2_OP_HARDLINK: 92 tmprc = SMB2_set_hardlink(xid, tcon, fid.persistent_fid, 93 fid.volatile_fid, (__le16 *)data); 94 break; 95 case SMB2_OP_SET_EOF: 96 tmprc = SMB2_set_eof(xid, tcon, fid.persistent_fid, 97 fid.volatile_fid, current->tgid, 98 (__le64 *)data, false); 99 break; 100 case SMB2_OP_SET_INFO: 101 tmprc = SMB2_set_info(xid, tcon, fid.persistent_fid, 102 fid.volatile_fid, 103 (FILE_BASIC_INFO *)data); 104 break; 105 default: 106 cifs_dbg(VFS, "Invalid command\n"); 107 break; 108 } 109 110 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); 111 if (tmprc) 112 rc = tmprc; 113 kfree(utf16_path); 114 return rc; 115} 116 117void 118move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src) 119{ 120 memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src); 121 dst->CurrentByteOffset = src->CurrentByteOffset; 122 dst->Mode = src->Mode; 123 dst->AlignmentRequirement = src->AlignmentRequirement; 124 dst->IndexNumber1 = 0; /* we don't use it */ 125} 126 127int 128smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, 129 struct cifs_sb_info *cifs_sb, const char *full_path, 130 FILE_ALL_INFO *data, bool *adjust_tz, bool *symlink) 131{ 132 int rc; 133 struct smb2_file_all_info *smb2_data; 134 135 *adjust_tz = false; 136 *symlink = false; 137 138 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2, 139 GFP_KERNEL); 140 if (smb2_data == NULL) 141 return -ENOMEM; 142 143 rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path, 144 FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 145 smb2_data, SMB2_OP_QUERY_INFO); 146 if (rc == -EOPNOTSUPP) { 147 *symlink = true; 148 /* Failed on a symbolic link - query a reparse point info */ 149 rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path, 150 FILE_READ_ATTRIBUTES, FILE_OPEN, 151 OPEN_REPARSE_POINT, smb2_data, 152 SMB2_OP_QUERY_INFO); 153 } 154 if (rc) 155 goto out; 156 157 move_smb2_info_to_cifs(data, smb2_data); 158out: 159 kfree(smb2_data); 160 return rc; 161} 162 163int 164smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name, 165 struct cifs_sb_info *cifs_sb) 166{ 167 return smb2_open_op_close(xid, tcon, cifs_sb, name, 168 FILE_WRITE_ATTRIBUTES, FILE_CREATE, 169 CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR); 170} 171 172void 173smb2_mkdir_setinfo(struct inode *inode, const char *name, 174 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon, 175 const unsigned int xid) 176{ 177 FILE_BASIC_INFO data; 178 struct cifsInodeInfo *cifs_i; 179 u32 dosattrs; 180 int tmprc; 181 182 memset(&data, 0, sizeof(data)); 183 cifs_i = CIFS_I(inode); 184 dosattrs = cifs_i->cifsAttrs | ATTR_READONLY; 185 data.Attributes = cpu_to_le32(dosattrs); 186 tmprc = smb2_open_op_close(xid, tcon, cifs_sb, name, 187 FILE_WRITE_ATTRIBUTES, FILE_CREATE, 188 CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO); 189 if (tmprc == 0) 190 cifs_i->cifsAttrs = dosattrs; 191} 192 193int 194smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name, 195 struct cifs_sb_info *cifs_sb) 196{ 197 return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN, 198 CREATE_NOT_FILE, 199 NULL, SMB2_OP_RMDIR); 200} 201 202int 203smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name, 204 struct cifs_sb_info *cifs_sb) 205{ 206 return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN, 207 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT, 208 NULL, SMB2_OP_DELETE); 209} 210 211static int 212smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon, 213 const char *from_name, const char *to_name, 214 struct cifs_sb_info *cifs_sb, __u32 access, int command) 215{ 216 __le16 *smb2_to_name = NULL; 217 int rc; 218 219 smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb); 220 if (smb2_to_name == NULL) { 221 rc = -ENOMEM; 222 goto smb2_rename_path; 223 } 224 225 rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access, 226 FILE_OPEN, 0, smb2_to_name, command); 227smb2_rename_path: 228 kfree(smb2_to_name); 229 return rc; 230} 231 232int 233smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon, 234 const char *from_name, const char *to_name, 235 struct cifs_sb_info *cifs_sb) 236{ 237 return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb, 238 DELETE, SMB2_OP_RENAME); 239} 240 241int 242smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon, 243 const char *from_name, const char *to_name, 244 struct cifs_sb_info *cifs_sb) 245{ 246 return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb, 247 FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK); 248} 249 250int 251smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon, 252 const char *full_path, __u64 size, 253 struct cifs_sb_info *cifs_sb, bool set_alloc) 254{ 255 __le64 eof = cpu_to_le64(size); 256 return smb2_open_op_close(xid, tcon, cifs_sb, full_path, 257 FILE_WRITE_DATA, FILE_OPEN, 0, &eof, 258 SMB2_OP_SET_EOF); 259} 260 261int 262smb2_set_file_info(struct inode *inode, const char *full_path, 263 FILE_BASIC_INFO *buf, const unsigned int xid) 264{ 265 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 266 struct tcon_link *tlink; 267 int rc; 268 269 tlink = cifs_sb_tlink(cifs_sb); 270 if (IS_ERR(tlink)) 271 return PTR_ERR(tlink); 272 rc = smb2_open_op_close(xid, tlink_tcon(tlink), cifs_sb, full_path, 273 FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf, 274 SMB2_OP_SET_INFO); 275 cifs_put_tlink(tlink); 276 return rc; 277} 278