^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * fs/cifs/dir.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * vfs operations that deal with dentries
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) International Business Machines Corp., 2002,2009
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Author(s): Steve French (sfrench@us.ibm.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * This library is free software; you can redistribute it and/or modify
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * it under the terms of the GNU Lesser General Public License as published
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * by the Free Software Foundation; either version 2.1 of the License, or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * (at your option) any later version.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * This library is distributed in the hope that it will be useful,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * but WITHOUT ANY WARRANTY; without even the implied warranty of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * the GNU Lesser General Public License for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * You should have received a copy of the GNU Lesser General Public License
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * along with this library; if not, write to the Free Software
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/namei.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/mount.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include "cifsfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include "cifspdu.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include "cifsglob.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include "cifsproto.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include "cifs_debug.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include "cifs_fs_sb.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include "cifs_unicode.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) renew_parental_timestamps(struct dentry *direntry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) /* BB check if there is a way to get the kernel to do this or if we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) really need this */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) cifs_set_time(direntry, jiffies);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) direntry = direntry->d_parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) } while (!IS_ROOT(direntry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) char *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) cifs_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct cifs_tcon *tcon, int add_treename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) int dfsplen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) char *full_path = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /* if no prefix path, simply set path to the root of share to "" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (pplen == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) full_path = kzalloc(1, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return full_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (add_treename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) dfsplen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) if (full_path == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) return full_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (dfsplen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) memcpy(full_path, tcon->treeName, dfsplen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) full_path[dfsplen] = CIFS_DIR_SEP(cifs_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) memcpy(full_path + dfsplen + 1, vol->prepath, pplen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return full_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) /* Note: caller must free return buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) char *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) build_path_from_dentry(struct dentry *direntry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) bool prefix = tcon->Flags & SMB_SHARE_IS_IN_DFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return build_path_from_dentry_optional_prefix(direntry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) prefix);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) char *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) build_path_from_dentry_optional_prefix(struct dentry *direntry, bool prefix)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) struct dentry *temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) int namelen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) int dfsplen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) int pplen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) char *full_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) char dirsep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) unsigned seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) dirsep = CIFS_DIR_SEP(cifs_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (prefix)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) dfsplen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) pplen = cifs_sb->prepath ? strlen(cifs_sb->prepath) + 1 : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) cifs_bp_rename_retry:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) namelen = dfsplen + pplen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) seq = read_seqbegin(&rename_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) for (temp = direntry; !IS_ROOT(temp);) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) namelen += (1 + temp->d_name.len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) temp = temp->d_parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (temp == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) cifs_dbg(VFS, "corrupt dentry\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) full_path = kmalloc(namelen+1, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (full_path == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return full_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) full_path[namelen] = 0; /* trailing null */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) for (temp = direntry; !IS_ROOT(temp);) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) spin_lock(&temp->d_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) namelen -= 1 + temp->d_name.len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (namelen < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) spin_unlock(&temp->d_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) full_path[namelen] = dirsep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) strncpy(full_path + namelen + 1, temp->d_name.name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) temp->d_name.len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) cifs_dbg(FYI, "name: %s\n", full_path + namelen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) spin_unlock(&temp->d_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) temp = temp->d_parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (temp == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) cifs_dbg(VFS, "corrupt dentry\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) kfree(full_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) if (namelen != dfsplen + pplen || read_seqretry(&rename_lock, seq)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) cifs_dbg(FYI, "did not end path lookup where expected. namelen=%ddfsplen=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) namelen, dfsplen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) /* presumably this is only possible if racing with a rename
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) of one of the parent directories (we can not lock the dentries
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) above us to prevent this, but retrying should be harmless) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) kfree(full_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) goto cifs_bp_rename_retry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) /* DIR_SEP already set for byte 0 / vs \ but not for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) subsequent slashes in prepath which currently must
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) be entered the right way - not sure if there is an alternative
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) since the '\' is a valid posix character so we can not switch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) those safely to '/' if any are found in the middle of the prepath */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) /* BB test paths to Windows with '/' in the midst of prepath */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) if (pplen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) cifs_dbg(FYI, "using cifs_sb prepath <%s>\n", cifs_sb->prepath);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) memcpy(full_path+dfsplen+1, cifs_sb->prepath, pplen-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) full_path[dfsplen] = dirsep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) for (i = 0; i < pplen-1; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (full_path[dfsplen+1+i] == '/')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) full_path[dfsplen+1+i] = CIFS_DIR_SEP(cifs_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) if (dfsplen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) strncpy(full_path, tcon->treeName, dfsplen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) for (i = 0; i < dfsplen; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) if (full_path[i] == '\\')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) full_path[i] = '/';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) return full_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * Don't allow path components longer than the server max.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) * Don't allow the separator character in a path component.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) * The VFS will not allow "/", but "\" is allowed by posix.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) check_name(struct dentry *direntry, struct cifs_tcon *tcon)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) if (unlikely(tcon->fsAttrInfo.MaxPathNameComponentLength &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) direntry->d_name.len >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) return -ENAMETOOLONG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) for (i = 0; i < direntry->d_name.len; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) if (direntry->d_name.name[i] == '\\') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) cifs_dbg(FYI, "Invalid file name\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) /* Inode operations in similar order to how they appear in Linux file fs.h */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) struct tcon_link *tlink, unsigned oflags, umode_t mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) __u32 *oplock, struct cifs_fid *fid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) int rc = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) int create_options = CREATE_NOT_DIR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) int desired_access;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) struct cifs_tcon *tcon = tlink_tcon(tlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) char *full_path = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) FILE_ALL_INFO *buf = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) struct inode *newinode = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) int disposition;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) struct TCP_Server_Info *server = tcon->ses->server;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) struct cifs_open_parms oparms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) *oplock = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) if (tcon->ses->server->oplocks)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) *oplock = REQ_OPLOCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) full_path = build_path_from_dentry(direntry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) if (!full_path)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (tcon->unix_ext && cap_unix(tcon->ses) && !tcon->broken_posix_open &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) (CIFS_UNIX_POSIX_PATH_OPS_CAP &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) le64_to_cpu(tcon->fsUnixInfo.Capability))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) rc = cifs_posix_open(full_path, &newinode, inode->i_sb, mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) oflags, oplock, &fid->netfid, xid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) switch (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) if (newinode == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) /* query inode info */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) goto cifs_create_get_file_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) if (S_ISDIR(newinode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) CIFSSMBClose(xid, tcon, fid->netfid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) iput(newinode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) rc = -EISDIR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) if (!S_ISREG(newinode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) * The server may allow us to open things like
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) * FIFOs, but the client isn't set up to deal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) * with that. If it's not a regular file, just
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) * close it and proceed as if it were a normal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) * lookup.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) CIFSSMBClose(xid, tcon, fid->netfid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) goto cifs_create_get_file_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) /* success, no need to query */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) goto cifs_create_set_dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) case -ENOENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) goto cifs_create_get_file_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) case -EIO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) case -EINVAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) * EIO could indicate that (posix open) operation is not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) * supported, despite what server claimed in capability
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) * negotiation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) * POSIX open in samba versions 3.3.1 and earlier could
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) * incorrectly fail with invalid parameter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) tcon->broken_posix_open = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) case -EREMOTE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) case -EOPNOTSUPP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) * EREMOTE indicates DFS junction, which is not handled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) * in posix open. If either that or op not supported
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) * returned, follow the normal lookup.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) * fallthrough to retry, using older open call, this is case
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) * where server does not support this SMB level, and falsely
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) * claims capability (also get here for DFS case which should be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) * rare for path not covered on files)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) desired_access = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) if (OPEN_FMODE(oflags) & FMODE_READ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) desired_access |= GENERIC_READ; /* is this too little? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) if (OPEN_FMODE(oflags) & FMODE_WRITE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) desired_access |= GENERIC_WRITE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) disposition = FILE_OVERWRITE_IF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) disposition = FILE_CREATE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) disposition = FILE_OVERWRITE_IF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) else if ((oflags & O_CREAT) == O_CREAT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) disposition = FILE_OPEN_IF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) cifs_dbg(FYI, "Create flag not set in create function\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) * BB add processing to set equivalent of mode - e.g. via CreateX with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) * ACLs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) if (!server->ops->open) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) rc = -ENOSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) if (buf == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) * if we're not using unix extensions, see if we need to set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) * ATTR_READONLY on the create call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) if (!tcon->unix_ext && (mode & S_IWUGO) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) create_options |= CREATE_OPTION_READONLY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) oparms.tcon = tcon;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) oparms.cifs_sb = cifs_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) oparms.desired_access = desired_access;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) oparms.create_options = cifs_create_options(cifs_sb, create_options);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) oparms.disposition = disposition;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) oparms.path = full_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) oparms.fid = fid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) oparms.reconnect = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) oparms.mode = mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) rc = server->ops->open(xid, &oparms, oplock, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) cifs_dbg(FYI, "cifs_create returned 0x%x\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) * If Open reported that we actually created a file then we now have to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) * set the mode if possible.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) if ((tcon->unix_ext) && (*oplock & CIFS_CREATE_ACTION)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) struct cifs_unix_set_info_args args = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) .mode = mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) .ctime = NO_CHANGE_64,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) .atime = NO_CHANGE_64,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) .mtime = NO_CHANGE_64,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) .device = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) args.uid = current_fsuid();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) if (inode->i_mode & S_ISGID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) args.gid = inode->i_gid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) args.gid = current_fsgid();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) args.uid = INVALID_UID; /* no change */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) args.gid = INVALID_GID; /* no change */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) CIFSSMBUnixSetFileInfo(xid, tcon, &args, fid->netfid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) current->tgid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) * BB implement mode setting via Windows security
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) * descriptors e.g.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) /* Could set r/o dos attribute if mode & 0222 == 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) cifs_create_get_file_info:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) /* server might mask mode so we have to query for it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) if (tcon->unix_ext)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) rc = cifs_get_inode_info_unix(&newinode, full_path, inode->i_sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) xid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) /* TODO: Add support for calling POSIX query info here, but passing in fid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) rc = cifs_get_inode_info(&newinode, full_path, buf, inode->i_sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) xid, fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (newinode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) if (server->ops->set_lease_key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) server->ops->set_lease_key(newinode, fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) newinode->i_mode = mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) if ((*oplock & CIFS_CREATE_ACTION) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) newinode->i_uid = current_fsuid();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) if (inode->i_mode & S_ISGID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) newinode->i_gid = inode->i_gid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) newinode->i_gid = current_fsgid();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) cifs_create_set_dentry:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) if (rc != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) cifs_dbg(FYI, "Create worked, get_inode_info failed rc = %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) if (S_ISDIR(newinode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) rc = -EISDIR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) d_drop(direntry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) d_add(direntry, newinode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) kfree(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) kfree(full_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) out_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) if (server->ops->close)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) server->ops->close(xid, tcon, fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) if (newinode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) iput(newinode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) cifs_atomic_open(struct inode *inode, struct dentry *direntry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) struct file *file, unsigned oflags, umode_t mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) unsigned int xid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) struct tcon_link *tlink;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) struct cifs_tcon *tcon;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) struct TCP_Server_Info *server;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) struct cifs_fid fid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) struct cifs_pending_open open;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) __u32 oplock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) struct cifsFileInfo *file_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) * Posix open is only called (at lookup time) for file create now. For
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) * opens (rather than creates), because we do not know if it is a file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) * or directory yet, and current Samba no longer allows us to do posix
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) * open on dirs, we could end up wasting an open call on what turns out
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) * to be a dir. For file opens, we wait to call posix open till
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) * cifs_open. It could be added to atomic_open in the future but the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) * performance tradeoff of the extra network request when EISDIR or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) * EACCES is returned would have to be weighed against the 50% reduction
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) * in network traffic in the other paths.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) if (!(oflags & O_CREAT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) struct dentry *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) * Check for hashed negative dentry. We have already revalidated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) * the dentry and it is fine. No need to perform another lookup.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) if (!d_in_lookup(direntry))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) res = cifs_lookup(inode, direntry, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) if (IS_ERR(res))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) return PTR_ERR(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) return finish_no_open(file, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) xid = get_xid();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) cifs_dbg(FYI, "parent inode = 0x%p name is: %pd and dentry = 0x%p\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) inode, direntry, direntry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) if (IS_ERR(tlink)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) rc = PTR_ERR(tlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) goto out_free_xid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) tcon = tlink_tcon(tlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) rc = check_name(direntry, tcon);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) server = tcon->ses->server;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) if (server->ops->new_lease_key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) server->ops->new_lease_key(&fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) cifs_add_pending_open(&fid, tlink, &open);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) &oplock, &fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) cifs_del_pending_open(&open);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) file->f_mode |= FMODE_CREATED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) rc = finish_open(file, direntry, generic_file_open);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) if (server->ops->close)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) server->ops->close(xid, tcon, &fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) cifs_del_pending_open(&open);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) if (file->f_flags & O_DIRECT &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) if (CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) file->f_op = &cifs_file_direct_nobrl_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) file->f_op = &cifs_file_direct_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) file_info = cifs_new_fileinfo(&fid, file, tlink, oplock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) if (file_info == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) if (server->ops->close)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) server->ops->close(xid, tcon, &fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) cifs_del_pending_open(&open);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) cifs_put_tlink(tlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) out_free_xid:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) free_xid(xid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) int cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) bool excl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) unsigned int xid = get_xid();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) * BB below access is probably too much for mknod to request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) * but we have to do query and setpathinfo so requesting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) * less could fail (unless we want to request getatr and setatr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) * permissions (only). At least for POSIX we do not have to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) * request so much.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) unsigned oflags = O_EXCL | O_CREAT | O_RDWR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) struct tcon_link *tlink;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) struct cifs_tcon *tcon;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) struct TCP_Server_Info *server;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) struct cifs_fid fid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) __u32 oplock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) cifs_dbg(FYI, "cifs_create parent inode = 0x%p name is: %pd and dentry = 0x%p\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) inode, direntry, direntry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) rc = PTR_ERR(tlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) if (IS_ERR(tlink))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) goto out_free_xid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) tcon = tlink_tcon(tlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) server = tcon->ses->server;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) if (server->ops->new_lease_key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) server->ops->new_lease_key(&fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) &oplock, &fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) if (!rc && server->ops->close)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) server->ops->close(xid, tcon, &fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) cifs_put_tlink(tlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) out_free_xid:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) free_xid(xid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) int cifs_mknod(struct inode *inode, struct dentry *direntry, umode_t mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) dev_t device_number)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) int rc = -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) unsigned int xid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) struct cifs_sb_info *cifs_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) struct tcon_link *tlink;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) struct cifs_tcon *tcon;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) char *full_path = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) if (!old_valid_dev(device_number))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) cifs_sb = CIFS_SB(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) tlink = cifs_sb_tlink(cifs_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) if (IS_ERR(tlink))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) return PTR_ERR(tlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) tcon = tlink_tcon(tlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) xid = get_xid();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) full_path = build_path_from_dentry(direntry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) if (full_path == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) goto mknod_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) rc = tcon->ses->server->ops->make_node(xid, inode, direntry, tcon,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) full_path, mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) device_number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) mknod_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) kfree(full_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) free_xid(xid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) cifs_put_tlink(tlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) struct dentry *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) unsigned int xid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) int rc = 0; /* to get around spurious gcc warning, set to zero here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) struct cifs_sb_info *cifs_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) struct tcon_link *tlink;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) struct cifs_tcon *pTcon;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) struct inode *newInode = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) char *full_path = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) xid = get_xid();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) cifs_dbg(FYI, "parent inode = 0x%p name is: %pd and dentry = 0x%p\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) parent_dir_inode, direntry, direntry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) /* check whether path exists */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) cifs_sb = CIFS_SB(parent_dir_inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) tlink = cifs_sb_tlink(cifs_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) if (IS_ERR(tlink)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) free_xid(xid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) return ERR_CAST(tlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) pTcon = tlink_tcon(tlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) rc = check_name(direntry, pTcon);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) if (unlikely(rc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) cifs_put_tlink(tlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) free_xid(xid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) return ERR_PTR(rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) /* can not grab the rename sem here since it would
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) deadlock in the cases (beginning of sys_rename itself)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) in which we already have the sb rename sem */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) full_path = build_path_from_dentry(direntry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) if (full_path == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) cifs_put_tlink(tlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) free_xid(xid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) if (d_really_is_positive(direntry)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) cifs_dbg(FYI, "non-NULL inode in lookup\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) cifs_dbg(FYI, "NULL inode in lookup\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) cifs_dbg(FYI, "Full path: %s inode = 0x%p\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) full_path, d_inode(direntry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) if (pTcon->posix_extensions)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) rc = smb311_posix_get_inode_info(&newInode, full_path, parent_dir_inode->i_sb, xid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) else if (pTcon->unix_ext) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) rc = cifs_get_inode_info_unix(&newInode, full_path,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) parent_dir_inode->i_sb, xid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) rc = cifs_get_inode_info(&newInode, full_path, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) parent_dir_inode->i_sb, xid, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) if (rc == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) /* since paths are not looked up by component - the parent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) directories are presumed to be good here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) renew_parental_timestamps(direntry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) } else if (rc == -ENOENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) cifs_set_time(direntry, jiffies);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) newInode = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) if (rc != -EACCES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) cifs_dbg(FYI, "Unexpected lookup error %d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) /* We special case check for Access Denied - since that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) is a common return code */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) newInode = ERR_PTR(rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) kfree(full_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) cifs_put_tlink(tlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) free_xid(xid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) return d_splice_alias(newInode, direntry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) cifs_d_revalidate(struct dentry *direntry, unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) if (flags & LOOKUP_RCU)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) return -ECHILD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) if (d_really_is_positive(direntry)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) inode = d_inode(direntry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) if ((flags & LOOKUP_REVAL) && !CIFS_CACHE_READ(CIFS_I(inode)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) CIFS_I(inode)->time = 0; /* force reval */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) rc = cifs_revalidate_dentry(direntry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) cifs_dbg(FYI, "cifs_revalidate_dentry failed with rc=%d", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) switch (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) case -ENOENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) case -ESTALE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) * Those errors mean the dentry is invalid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) * (file was deleted or recreated)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) * Otherwise some unexpected error happened
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) * report it as-is to VFS layer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) * If the inode wasn't known to be a dfs entry when
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) * the dentry was instantiated, such as when created
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) * via ->readdir(), it needs to be set now since the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) * attributes will have been updated by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) * cifs_revalidate_dentry().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) if (IS_AUTOMOUNT(inode) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) !(direntry->d_flags & DCACHE_NEED_AUTOMOUNT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) spin_lock(&direntry->d_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) direntry->d_flags |= DCACHE_NEED_AUTOMOUNT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) spin_unlock(&direntry->d_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) * This may be nfsd (or something), anyway, we can't see the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) * intent of this. So, since this can be for creation, drop it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) if (!flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) * Drop the negative dentry, in order to make sure to use the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) * case sensitive name which is specified by user if this is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) * for creation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) if (time_after(jiffies, cifs_get_time(direntry) + HZ) || !lookupCacheEnabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) /* static int cifs_d_delete(struct dentry *direntry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) cifs_dbg(FYI, "In cifs d_delete, name = %pd\n", direntry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) } */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) const struct dentry_operations cifs_dentry_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) .d_revalidate = cifs_d_revalidate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) .d_automount = cifs_dfs_d_automount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) /* d_delete: cifs_d_delete, */ /* not needed except for debugging */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) static int cifs_ci_hash(const struct dentry *dentry, struct qstr *q)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) unsigned long hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) wchar_t c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) int i, charlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) hash = init_name_hash(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) for (i = 0; i < q->len; i += charlen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) charlen = codepage->char2uni(&q->name[i], q->len - i, &c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) /* error out if we can't convert the character */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) if (unlikely(charlen < 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) return charlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) hash = partial_name_hash(cifs_toupper(c), hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) q->hash = end_name_hash(hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) static int cifs_ci_compare(const struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) unsigned int len, const char *str, const struct qstr *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) wchar_t c1, c2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) int i, l1, l2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) * We make the assumption here that uppercase characters in the local
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) * codepage are always the same length as their lowercase counterparts.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) * If that's ever not the case, then this will fail to match it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) if (name->len != len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) for (i = 0; i < len; i += l1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) /* Convert characters in both strings to UTF-16. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) l1 = codepage->char2uni(&str[i], len - i, &c1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) l2 = codepage->char2uni(&name->name[i], name->len - i, &c2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) * If we can't convert either character, just declare it to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) * be 1 byte long and compare the original byte.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) if (unlikely(l1 < 0 && l2 < 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) if (str[i] != name->name[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) l1 = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) * Here, we again ass|u|me that upper/lowercase versions of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) * a character are the same length in the local NLS.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) if (l1 != l2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) /* Now compare uppercase versions of these characters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) if (cifs_toupper(c1) != cifs_toupper(c2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) const struct dentry_operations cifs_ci_dentry_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) .d_revalidate = cifs_d_revalidate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) .d_hash = cifs_ci_hash,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) .d_compare = cifs_ci_compare,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) .d_automount = cifs_dfs_d_automount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) };
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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