^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * fs/cifs/smb2file.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) International Business Machines Corp., 2002, 2011
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Author(s): Steve French (sfrench@us.ibm.com),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Pavel Shilovsky ((pshilovsky@samba.org) 2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * This library is free software; you can redistribute it and/or modify
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * it under the terms of the GNU Lesser General Public License as published
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * by the Free Software Foundation; either version 2.1 of the License, or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * (at your option) any later version.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * This library is distributed in the hope that it will be useful,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * but WITHOUT ANY WARRANTY; without even the implied warranty of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * the GNU Lesser General Public License for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * You should have received a copy of the GNU Lesser General Public License
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * along with this library; if not, write to the Free Software
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <asm/div64.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include "cifsfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include "cifspdu.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include "cifsglob.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include "cifsproto.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include "cifs_debug.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include "cifs_fs_sb.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include "cifs_unicode.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include "fscache.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include "smb2proto.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) smb2_open_file(const unsigned int xid, struct cifs_open_parms *oparms,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) __u32 *oplock, FILE_ALL_INFO *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) __le16 *smb2_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) struct smb2_file_all_info *smb2_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) __u8 smb2_oplock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct cifs_fid *fid = oparms->fid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct network_resiliency_req nr_ioctl_req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) smb2_path = cifs_convert_path_to_utf16(oparms->path, oparms->cifs_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if (smb2_path == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (smb2_data == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) oparms->desired_access |= FILE_READ_ATTRIBUTES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) smb2_oplock = SMB2_OPLOCK_LEVEL_BATCH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) rc = SMB2_open(xid, oparms, smb2_path, &smb2_oplock, smb2_data, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (oparms->tcon->use_resilient) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /* default timeout is 0, servers pick default (120 seconds) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) nr_ioctl_req.Timeout =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) cpu_to_le32(oparms->tcon->handle_timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) nr_ioctl_req.Reserved = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) rc = SMB2_ioctl(xid, oparms->tcon, fid->persistent_fid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) fid->volatile_fid, FSCTL_LMR_REQUEST_RESILIENCY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) true /* is_fsctl */,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) (char *)&nr_ioctl_req, sizeof(nr_ioctl_req),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) CIFSMaxBufSize, NULL, NULL /* no return info */);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (rc == -EOPNOTSUPP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) cifs_dbg(VFS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) "resiliency not supported by server, disabling\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) oparms->tcon->use_resilient = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) } else if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) cifs_dbg(FYI, "error %d setting resiliency\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) /* if open response does not have IndexNumber field - get it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) if (smb2_data->IndexNumber == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) rc = SMB2_get_srv_num(xid, oparms->tcon,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) fid->persistent_fid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) fid->volatile_fid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) &smb2_data->IndexNumber);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * let get_inode_info disable server inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) * numbers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) smb2_data->IndexNumber = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) move_smb2_info_to_cifs(buf, smb2_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) *oplock = smb2_oplock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) kfree(smb2_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) kfree(smb2_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) smb2_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) const unsigned int xid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) int rc = 0, stored_rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) unsigned int max_num, num = 0, max_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) struct smb2_lock_element *buf, *cur;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) struct cifsLockInfo *li, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) __u64 length = 1 + flock->fl_end - flock->fl_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) struct list_head tmp_llist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) INIT_LIST_HEAD(&tmp_llist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) * Accessing maxBuf is racy with cifs_reconnect - need to store value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) * and check it before using.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) max_buf = tcon->ses->server->maxBuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (max_buf < sizeof(struct smb2_lock_element))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) BUILD_BUG_ON(sizeof(struct smb2_lock_element) > PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) max_buf = min_t(unsigned int, max_buf, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) max_num = max_buf / sizeof(struct smb2_lock_element);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) buf = kcalloc(max_num, sizeof(struct smb2_lock_element), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (!buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) cur = buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) cifs_down_write(&cinode->lock_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) list_for_each_entry_safe(li, tmp, &cfile->llist->locks, llist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) if (flock->fl_start > li->offset ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) (flock->fl_start + length) <
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) (li->offset + li->length))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (current->tgid != li->pid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * flock and OFD lock are associated with an open
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * file description, not the process.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (!(flock->fl_flags & (FL_FLOCK | FL_OFDLCK)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) if (cinode->can_cache_brlcks) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) * We can cache brlock requests - simply remove a lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) * from the file's list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) list_del(&li->llist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) cifs_del_lock_waiters(li);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) kfree(li);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) cur->Length = cpu_to_le64(li->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) cur->Offset = cpu_to_le64(li->offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) cur->Flags = cpu_to_le32(SMB2_LOCKFLAG_UNLOCK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) * We need to save a lock here to let us add it again to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) * file's list if the unlock range request fails on the server.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) list_move(&li->llist, &tmp_llist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) if (++num == max_num) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) stored_rc = smb2_lockv(xid, tcon,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) cfile->fid.persistent_fid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) cfile->fid.volatile_fid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) current->tgid, num, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (stored_rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) * We failed on the unlock range request - add
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) * all locks from the tmp list to the head of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) * the file's list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) cifs_move_llist(&tmp_llist,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) &cfile->llist->locks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) rc = stored_rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * The unlock range request succeed - free the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * tmp list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) cifs_free_llist(&tmp_llist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) cur = buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) num = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) cur++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) if (num) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) stored_rc = smb2_lockv(xid, tcon, cfile->fid.persistent_fid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) cfile->fid.volatile_fid, current->tgid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) num, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (stored_rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) cifs_move_llist(&tmp_llist, &cfile->llist->locks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) rc = stored_rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) cifs_free_llist(&tmp_llist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) up_write(&cinode->lock_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) kfree(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) smb2_push_mand_fdlocks(struct cifs_fid_locks *fdlocks, const unsigned int xid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) struct smb2_lock_element *buf, unsigned int max_num)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) int rc = 0, stored_rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) struct cifsFileInfo *cfile = fdlocks->cfile;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) struct cifsLockInfo *li;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) unsigned int num = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) struct smb2_lock_element *cur = buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) list_for_each_entry(li, &fdlocks->locks, llist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) cur->Length = cpu_to_le64(li->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) cur->Offset = cpu_to_le64(li->offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) cur->Flags = cpu_to_le32(li->type |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) if (++num == max_num) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) stored_rc = smb2_lockv(xid, tcon,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) cfile->fid.persistent_fid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) cfile->fid.volatile_fid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) current->tgid, num, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) if (stored_rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) rc = stored_rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) cur = buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) num = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) cur++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) if (num) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) stored_rc = smb2_lockv(xid, tcon,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) cfile->fid.persistent_fid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) cfile->fid.volatile_fid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) current->tgid, num, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) if (stored_rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) rc = stored_rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) smb2_push_mandatory_locks(struct cifsFileInfo *cfile)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) int rc = 0, stored_rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) unsigned int xid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) unsigned int max_num, max_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) struct smb2_lock_element *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) struct cifs_fid_locks *fdlocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) xid = get_xid();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) * Accessing maxBuf is racy with cifs_reconnect - need to store value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) * and check it for zero before using.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) max_buf = tlink_tcon(cfile->tlink)->ses->server->maxBuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (max_buf < sizeof(struct smb2_lock_element)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) free_xid(xid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) BUILD_BUG_ON(sizeof(struct smb2_lock_element) > PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) max_buf = min_t(unsigned int, max_buf, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) max_num = max_buf / sizeof(struct smb2_lock_element);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) buf = kcalloc(max_num, sizeof(struct smb2_lock_element), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) if (!buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) free_xid(xid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) list_for_each_entry(fdlocks, &cinode->llist, llist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) stored_rc = smb2_push_mand_fdlocks(fdlocks, xid, buf, max_num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) if (stored_rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) rc = stored_rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) kfree(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) free_xid(xid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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