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authorSteve French <stfrench@microsoft.com>2023-05-22 04:46:30 +0300
committerSteve French <stfrench@microsoft.com>2023-05-25 00:29:21 +0300
commit38c8a9a52082579090e34c033d439ed2cd1a462d (patch)
treeca6c3bf5b2b912f32735c1aa0a045cd21a47a205 /fs/cifs/smb2file.c
parentcb8b02fd6343228966324528adf920bfb8b8e681 (diff)
downloadlinux-38c8a9a52082579090e34c033d439ed2cd1a462d.tar.xz
smb: move client and server files to common directory fs/smb
Move CIFS/SMB3 related client and server files (cifs.ko and ksmbd.ko and helper modules) to new fs/smb subdirectory: fs/cifs --> fs/smb/client fs/ksmbd --> fs/smb/server fs/smbfs_common --> fs/smb/common Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/smb2file.c')
-rw-r--r--fs/cifs/smb2file.c372
1 files changed, 0 insertions, 372 deletions
diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c
deleted file mode 100644
index e0ee96d69d49..000000000000
--- a/fs/cifs/smb2file.c
+++ /dev/null
@@ -1,372 +0,0 @@
-// SPDX-License-Identifier: LGPL-2.1
-/*
- *
- * Copyright (C) International Business Machines Corp., 2002, 2011
- * Author(s): Steve French (sfrench@us.ibm.com),
- * Pavel Shilovsky ((pshilovsky@samba.org) 2012
- *
- */
-#include <linux/fs.h>
-#include <linux/filelock.h>
-#include <linux/stat.h>
-#include <linux/slab.h>
-#include <linux/pagemap.h>
-#include <asm/div64.h>
-#include "cifsfs.h"
-#include "cifspdu.h"
-#include "cifsglob.h"
-#include "cifsproto.h"
-#include "cifs_debug.h"
-#include "cifs_fs_sb.h"
-#include "cifs_unicode.h"
-#include "fscache.h"
-#include "smb2proto.h"
-#include "smb2status.h"
-
-static struct smb2_symlink_err_rsp *symlink_data(const struct kvec *iov)
-{
- struct smb2_err_rsp *err = iov->iov_base;
- struct smb2_symlink_err_rsp *sym = ERR_PTR(-EINVAL);
- u32 len;
-
- if (err->ErrorContextCount) {
- struct smb2_error_context_rsp *p, *end;
-
- len = (u32)err->ErrorContextCount * (offsetof(struct smb2_error_context_rsp,
- ErrorContextData) +
- sizeof(struct smb2_symlink_err_rsp));
- if (le32_to_cpu(err->ByteCount) < len || iov->iov_len < len + sizeof(*err) + 1)
- return ERR_PTR(-EINVAL);
-
- p = (struct smb2_error_context_rsp *)err->ErrorData;
- end = (struct smb2_error_context_rsp *)((u8 *)err + iov->iov_len);
- do {
- if (le32_to_cpu(p->ErrorId) == SMB2_ERROR_ID_DEFAULT) {
- sym = (struct smb2_symlink_err_rsp *)&p->ErrorContextData;
- break;
- }
- cifs_dbg(FYI, "%s: skipping unhandled error context: 0x%x\n",
- __func__, le32_to_cpu(p->ErrorId));
-
- len = ALIGN(le32_to_cpu(p->ErrorDataLength), 8);
- p = (struct smb2_error_context_rsp *)((u8 *)&p->ErrorContextData + len);
- } while (p < end);
- } else if (le32_to_cpu(err->ByteCount) >= sizeof(*sym) &&
- iov->iov_len >= SMB2_SYMLINK_STRUCT_SIZE) {
- sym = (struct smb2_symlink_err_rsp *)err->ErrorData;
- }
-
- if (!IS_ERR(sym) && (le32_to_cpu(sym->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
- le32_to_cpu(sym->ReparseTag) != IO_REPARSE_TAG_SYMLINK))
- sym = ERR_PTR(-EINVAL);
-
- return sym;
-}
-
-int smb2_parse_symlink_response(struct cifs_sb_info *cifs_sb, const struct kvec *iov, char **path)
-{
- struct smb2_symlink_err_rsp *sym;
- unsigned int sub_offs, sub_len;
- unsigned int print_offs, print_len;
- char *s;
-
- if (!cifs_sb || !iov || !iov->iov_base || !iov->iov_len || !path)
- return -EINVAL;
-
- sym = symlink_data(iov);
- if (IS_ERR(sym))
- return PTR_ERR(sym);
-
- sub_len = le16_to_cpu(sym->SubstituteNameLength);
- sub_offs = le16_to_cpu(sym->SubstituteNameOffset);
- print_len = le16_to_cpu(sym->PrintNameLength);
- print_offs = le16_to_cpu(sym->PrintNameOffset);
-
- if (iov->iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offs + sub_len ||
- iov->iov_len < SMB2_SYMLINK_STRUCT_SIZE + print_offs + print_len)
- return -EINVAL;
-
- s = cifs_strndup_from_utf16((char *)sym->PathBuffer + sub_offs, sub_len, true,
- cifs_sb->local_nls);
- if (!s)
- return -ENOMEM;
- convert_delimiter(s, '/');
- cifs_dbg(FYI, "%s: symlink target: %s\n", __func__, s);
-
- *path = s;
- return 0;
-}
-
-int smb2_open_file(const unsigned int xid, struct cifs_open_parms *oparms, __u32 *oplock, void *buf)
-{
- int rc;
- __le16 *smb2_path;
- __u8 smb2_oplock;
- struct cifs_open_info_data *data = buf;
- struct smb2_file_all_info file_info = {};
- struct smb2_file_all_info *smb2_data = data ? &file_info : NULL;
- struct kvec err_iov = {};
- int err_buftype = CIFS_NO_BUFFER;
- struct cifs_fid *fid = oparms->fid;
- struct network_resiliency_req nr_ioctl_req;
-
- smb2_path = cifs_convert_path_to_utf16(oparms->path, oparms->cifs_sb);
- if (smb2_path == NULL)
- return -ENOMEM;
-
- oparms->desired_access |= FILE_READ_ATTRIBUTES;
- smb2_oplock = SMB2_OPLOCK_LEVEL_BATCH;
-
- rc = SMB2_open(xid, oparms, smb2_path, &smb2_oplock, smb2_data, NULL, &err_iov,
- &err_buftype);
- if (rc && data) {
- struct smb2_hdr *hdr = err_iov.iov_base;
-
- if (unlikely(!err_iov.iov_base || err_buftype == CIFS_NO_BUFFER))
- goto out;
- if (hdr->Status == STATUS_STOPPED_ON_SYMLINK) {
- rc = smb2_parse_symlink_response(oparms->cifs_sb, &err_iov,
- &data->symlink_target);
- if (!rc) {
- memset(smb2_data, 0, sizeof(*smb2_data));
- oparms->create_options |= OPEN_REPARSE_POINT;
- rc = SMB2_open(xid, oparms, smb2_path, &smb2_oplock, smb2_data,
- NULL, NULL, NULL);
- oparms->create_options &= ~OPEN_REPARSE_POINT;
- }
- }
- }
-
- if (rc)
- goto out;
-
- if (oparms->tcon->use_resilient) {
- /* default timeout is 0, servers pick default (120 seconds) */
- nr_ioctl_req.Timeout =
- cpu_to_le32(oparms->tcon->handle_timeout);
- nr_ioctl_req.Reserved = 0;
- rc = SMB2_ioctl(xid, oparms->tcon, fid->persistent_fid,
- fid->volatile_fid, FSCTL_LMR_REQUEST_RESILIENCY,
- (char *)&nr_ioctl_req, sizeof(nr_ioctl_req),
- CIFSMaxBufSize, NULL, NULL /* no return info */);
- if (rc == -EOPNOTSUPP) {
- cifs_dbg(VFS,
- "resiliency not supported by server, disabling\n");
- oparms->tcon->use_resilient = false;
- } else if (rc)
- cifs_dbg(FYI, "error %d setting resiliency\n", rc);
-
- rc = 0;
- }
-
- if (smb2_data) {
- /* if open response does not have IndexNumber field - get it */
- if (smb2_data->IndexNumber == 0) {
- rc = SMB2_get_srv_num(xid, oparms->tcon,
- fid->persistent_fid,
- fid->volatile_fid,
- &smb2_data->IndexNumber);
- if (rc) {
- /*
- * let get_inode_info disable server inode
- * numbers
- */
- smb2_data->IndexNumber = 0;
- rc = 0;
- }
- }
- memcpy(&data->fi, smb2_data, sizeof(data->fi));
- }
-
- *oplock = smb2_oplock;
-out:
- free_rsp_buf(err_buftype, err_iov.iov_base);
- kfree(smb2_path);
- return rc;
-}
-
-int
-smb2_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock,
- const unsigned int xid)
-{
- int rc = 0, stored_rc;
- unsigned int max_num, num = 0, max_buf;
- struct smb2_lock_element *buf, *cur;
- struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
- struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
- struct cifsLockInfo *li, *tmp;
- __u64 length = 1 + flock->fl_end - flock->fl_start;
- struct list_head tmp_llist;
-
- INIT_LIST_HEAD(&tmp_llist);
-
- /*
- * Accessing maxBuf is racy with cifs_reconnect - need to store value
- * and check it before using.
- */
- max_buf = tcon->ses->server->maxBuf;
- if (max_buf < sizeof(struct smb2_lock_element))
- return -EINVAL;
-
- BUILD_BUG_ON(sizeof(struct smb2_lock_element) > PAGE_SIZE);
- max_buf = min_t(unsigned int, max_buf, PAGE_SIZE);
- max_num = max_buf / sizeof(struct smb2_lock_element);
- buf = kcalloc(max_num, sizeof(struct smb2_lock_element), GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
-
- cur = buf;
-
- cifs_down_write(&cinode->lock_sem);
- list_for_each_entry_safe(li, tmp, &cfile->llist->locks, llist) {
- if (flock->fl_start > li->offset ||
- (flock->fl_start + length) <
- (li->offset + li->length))
- continue;
- if (current->tgid != li->pid)
- /*
- * flock and OFD lock are associated with an open
- * file description, not the process.
- */
- if (!(flock->fl_flags & (FL_FLOCK | FL_OFDLCK)))
- continue;
- if (cinode->can_cache_brlcks) {
- /*
- * We can cache brlock requests - simply remove a lock
- * from the file's list.
- */
- list_del(&li->llist);
- cifs_del_lock_waiters(li);
- kfree(li);
- continue;
- }
- cur->Length = cpu_to_le64(li->length);
- cur->Offset = cpu_to_le64(li->offset);
- cur->Flags = cpu_to_le32(SMB2_LOCKFLAG_UNLOCK);
- /*
- * We need to save a lock here to let us add it again to the
- * file's list if the unlock range request fails on the server.
- */
- list_move(&li->llist, &tmp_llist);
- if (++num == max_num) {
- stored_rc = smb2_lockv(xid, tcon,
- cfile->fid.persistent_fid,
- cfile->fid.volatile_fid,
- current->tgid, num, buf);
- if (stored_rc) {
- /*
- * We failed on the unlock range request - add
- * all locks from the tmp list to the head of
- * the file's list.
- */
- cifs_move_llist(&tmp_llist,
- &cfile->llist->locks);
- rc = stored_rc;
- } else
- /*
- * The unlock range request succeed - free the
- * tmp list.
- */
- cifs_free_llist(&tmp_llist);
- cur = buf;
- num = 0;
- } else
- cur++;
- }
- if (num) {
- stored_rc = smb2_lockv(xid, tcon, cfile->fid.persistent_fid,
- cfile->fid.volatile_fid, current->tgid,
- num, buf);
- if (stored_rc) {
- cifs_move_llist(&tmp_llist, &cfile->llist->locks);
- rc = stored_rc;
- } else
- cifs_free_llist(&tmp_llist);
- }
- up_write(&cinode->lock_sem);
-
- kfree(buf);
- return rc;
-}
-
-static int
-smb2_push_mand_fdlocks(struct cifs_fid_locks *fdlocks, const unsigned int xid,
- struct smb2_lock_element *buf, unsigned int max_num)
-{
- int rc = 0, stored_rc;
- struct cifsFileInfo *cfile = fdlocks->cfile;
- struct cifsLockInfo *li;
- unsigned int num = 0;
- struct smb2_lock_element *cur = buf;
- struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
-
- list_for_each_entry(li, &fdlocks->locks, llist) {
- cur->Length = cpu_to_le64(li->length);
- cur->Offset = cpu_to_le64(li->offset);
- cur->Flags = cpu_to_le32(li->type |
- SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
- if (++num == max_num) {
- stored_rc = smb2_lockv(xid, tcon,
- cfile->fid.persistent_fid,
- cfile->fid.volatile_fid,
- current->tgid, num, buf);
- if (stored_rc)
- rc = stored_rc;
- cur = buf;
- num = 0;
- } else
- cur++;
- }
- if (num) {
- stored_rc = smb2_lockv(xid, tcon,
- cfile->fid.persistent_fid,
- cfile->fid.volatile_fid,
- current->tgid, num, buf);
- if (stored_rc)
- rc = stored_rc;
- }
-
- return rc;
-}
-
-int
-smb2_push_mandatory_locks(struct cifsFileInfo *cfile)
-{
- int rc = 0, stored_rc;
- unsigned int xid;
- unsigned int max_num, max_buf;
- struct smb2_lock_element *buf;
- struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
- struct cifs_fid_locks *fdlocks;
-
- xid = get_xid();
-
- /*
- * Accessing maxBuf is racy with cifs_reconnect - need to store value
- * and check it for zero before using.
- */
- max_buf = tlink_tcon(cfile->tlink)->ses->server->maxBuf;
- if (max_buf < sizeof(struct smb2_lock_element)) {
- free_xid(xid);
- return -EINVAL;
- }
-
- BUILD_BUG_ON(sizeof(struct smb2_lock_element) > PAGE_SIZE);
- max_buf = min_t(unsigned int, max_buf, PAGE_SIZE);
- max_num = max_buf / sizeof(struct smb2_lock_element);
- buf = kcalloc(max_num, sizeof(struct smb2_lock_element), GFP_KERNEL);
- if (!buf) {
- free_xid(xid);
- return -ENOMEM;
- }
-
- list_for_each_entry(fdlocks, &cinode->llist, llist) {
- stored_rc = smb2_push_mand_fdlocks(fdlocks, xid, buf, max_num);
- if (stored_rc)
- rc = stored_rc;
- }
-
- kfree(buf);
- free_xid(xid);
- return rc;
-}