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Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6 

Pull CIFS fixes from Steve French.

* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
  CIFS: Fix memory leaks in SMB2_open
  cifs: ensure that vol->username is not NULL before running strlen on it
  Clarify SMB2/SMB3 create context and add missing ones
  Do not send ClientGUID on SMB2.02 dialect
  cifs: Set client guid on per connection basis
  fs/cifs/netmisc.c: convert printk to pr_foo()
  fs/cifs/cifs.c: replace seq_printf by seq_puts
  Update cifs version number to 2.03
  fs: cifs: new helper: file_inode(file)
  cifs: fix potential races in cifs_revalidate_mapping
  cifs: new helper function: cifs_revalidate_mapping
  cifs: convert booleans in cifsInodeInfo to a flags field
  cifs: fix cifs_uniqueid_to_ino_t not to ever return 0
This commit is contained in:
Linus Torvalds 2014-06-09 19:08:43 -07:00
parent 1c54fc1efe 663a962151
commit b1cce8032f
11 changed files with 158 additions and 98 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

94
fs/cifs/cifsfs.c
View File

@ -87,10 +87,6 @@ extern mempool_t *cifs_mid_poolp;
struct workqueue_struct *cifsiod_wq;
#ifdef CONFIG_CIFS_SMB2
__u8 cifs_client_guid[SMB2_CLIENT_GUID_SIZE];
#endif
/*
* Bumps refcount for cifs super block.
* Note that it should be only called if a referece to VFS super block is
@ -251,11 +247,7 @@ cifs_alloc_inode(struct super_block *sb)
* server, can not assume caching of file data or metadata.
*/
cifs_set_oplock_level(cifs_inode, 0);
cifs_inode->delete_pending = false;
cifs_inode->invalid_mapping = false;
clear_bit(CIFS_INODE_PENDING_OPLOCK_BREAK, &cifs_inode->flags);
clear_bit(CIFS_INODE_PENDING_WRITERS, &cifs_inode->flags);
clear_bit(CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2, &cifs_inode->flags);
cifs_inode->flags = 0;
spin_lock_init(&cifs_inode->writers_lock);
cifs_inode->writers = 0;
cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
@ -302,7 +294,7 @@ cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
seq_printf(s, ",addr=");
seq_puts(s, ",addr=");
switch (server->dstaddr.ss_family) {
case AF_INET:
@ -314,7 +306,7 @@ cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
seq_printf(s, "%%%u", sa6->sin6_scope_id);
break;
default:
seq_printf(s, "(unknown)");
seq_puts(s, "(unknown)");
}
}
@ -324,45 +316,45 @@ cifs_show_security(struct seq_file *s, struct cifs_ses *ses)
if (ses->sectype == Unspecified)
return;
seq_printf(s, ",sec=");
seq_puts(s, ",sec=");
switch (ses->sectype) {
case LANMAN:
seq_printf(s, "lanman");
seq_puts(s, "lanman");
break;
case NTLMv2:
seq_printf(s, "ntlmv2");
seq_puts(s, "ntlmv2");
break;
case NTLM:
seq_printf(s, "ntlm");
seq_puts(s, "ntlm");
break;
case Kerberos:
seq_printf(s, "krb5");
seq_puts(s, "krb5");
break;
case RawNTLMSSP:
seq_printf(s, "ntlmssp");
seq_puts(s, "ntlmssp");
break;
default:
/* shouldn't ever happen */
seq_printf(s, "unknown");
seq_puts(s, "unknown");
break;
}
if (ses->sign)
seq_printf(s, "i");
seq_puts(s, "i");
}
static void
cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
{
seq_printf(s, ",cache=");
seq_puts(s, ",cache=");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
seq_printf(s, "strict");
seq_puts(s, "strict");
else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
seq_printf(s, "none");
seq_puts(s, "none");
else
seq_printf(s, "loose");
seq_puts(s, "loose");
}
static void
@ -395,7 +387,7 @@ cifs_show_options(struct seq_file *s, struct dentry *root)
cifs_show_cache_flavor(s, cifs_sb);
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
seq_printf(s, ",multiuser");
seq_puts(s, ",multiuser");
else if (tcon->ses->user_name)
seq_printf(s, ",username=%s", tcon->ses->user_name);
@ -421,16 +413,16 @@ cifs_show_options(struct seq_file *s, struct dentry *root)
seq_printf(s, ",uid=%u",
from_kuid_munged(&init_user_ns, cifs_sb->mnt_uid));
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
seq_printf(s, ",forceuid");
seq_puts(s, ",forceuid");
else
seq_printf(s, ",noforceuid");
seq_puts(s, ",noforceuid");
seq_printf(s, ",gid=%u",
from_kgid_munged(&init_user_ns, cifs_sb->mnt_gid));
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
seq_printf(s, ",forcegid");
seq_puts(s, ",forcegid");
else
seq_printf(s, ",noforcegid");
seq_puts(s, ",noforcegid");
cifs_show_address(s, tcon->ses->server);
@ -442,47 +434,47 @@ cifs_show_options(struct seq_file *s, struct dentry *root)
cifs_show_nls(s, cifs_sb->local_nls);
if (tcon->seal)
seq_printf(s, ",seal");
seq_puts(s, ",seal");
if (tcon->nocase)
seq_printf(s, ",nocase");
seq_puts(s, ",nocase");
if (tcon->retry)
seq_printf(s, ",hard");
seq_puts(s, ",hard");
if (tcon->unix_ext)
seq_printf(s, ",unix");
seq_puts(s, ",unix");
else
seq_printf(s, ",nounix");
seq_puts(s, ",nounix");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
seq_printf(s, ",posixpaths");
seq_puts(s, ",posixpaths");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
seq_printf(s, ",setuids");
seq_puts(s, ",setuids");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
seq_printf(s, ",serverino");
seq_puts(s, ",serverino");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
seq_printf(s, ",rwpidforward");
seq_puts(s, ",rwpidforward");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
seq_printf(s, ",forcemand");
seq_puts(s, ",forcemand");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
seq_printf(s, ",nouser_xattr");
seq_puts(s, ",nouser_xattr");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
seq_printf(s, ",mapchars");
seq_puts(s, ",mapchars");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
seq_printf(s, ",sfu");
seq_puts(s, ",sfu");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
seq_printf(s, ",nobrl");
seq_puts(s, ",nobrl");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
seq_printf(s, ",cifsacl");
seq_puts(s, ",cifsacl");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
seq_printf(s, ",dynperm");
seq_puts(s, ",dynperm");
if (root->d_sb->s_flags & MS_POSIXACL)
seq_printf(s, ",acl");
seq_puts(s, ",acl");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
seq_printf(s, ",mfsymlinks");
seq_puts(s, ",mfsymlinks");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
seq_printf(s, ",fsc");
seq_puts(s, ",fsc");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
seq_printf(s, ",nostrictsync");
seq_puts(s, ",nostrictsync");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
seq_printf(s, ",noperm");
seq_puts(s, ",noperm");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
seq_printf(s, ",backupuid=%u",
from_kuid_munged(&init_user_ns,
@ -1192,10 +1184,6 @@ init_cifs(void)
spin_lock_init(&cifs_file_list_lock);
spin_lock_init(&GlobalMid_Lock);
#ifdef CONFIG_CIFS_SMB2
get_random_bytes(cifs_client_guid, SMB2_CLIENT_GUID_SIZE);
#endif
if (cifs_max_pending < 2) {
cifs_max_pending = 2;
cifs_dbg(FYI, "cifs_max_pending set to min of 2\n");

22
fs/cifs/cifsfs.h
View File

@ -22,20 +22,28 @@
#ifndef _CIFSFS_H
#define _CIFSFS_H
#include <linux/hash.h>
#define ROOT_I 2
/*
* ino_t is 32-bits on 32-bit arch. We have to squash the 64-bit value down
* so that it will fit.
* so that it will fit. We use hash_64 to convert the value to 31 bits, and
* then add 1, to ensure that we don't end up with a 0 as the value.
*/
#if BITS_PER_LONG == 64
static inline ino_t
cifs_uniqueid_to_ino_t(u64 fileid)
{
ino_t ino = (ino_t) fileid;
if (sizeof(ino_t) < sizeof(u64))
ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8;
return ino;
return (ino_t)fileid;
}
#else
static inline ino_t
cifs_uniqueid_to_ino_t(u64 fileid)
{
return (ino_t)hash_64(fileid, (sizeof(ino_t) * 8) - 1) + 1;
}
#endif
extern struct file_system_type cifs_fs_type;
extern const struct address_space_operations cifs_addr_ops;
@ -67,6 +75,8 @@ extern int cifs_revalidate_dentry_attr(struct dentry *);
extern int cifs_revalidate_file(struct file *filp);
extern int cifs_revalidate_dentry(struct dentry *);
extern int cifs_invalidate_mapping(struct inode *inode);
extern int cifs_revalidate_mapping(struct inode *inode);
extern int cifs_zap_mapping(struct inode *inode);
extern int cifs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
extern int cifs_setattr(struct dentry *, struct iattr *);
@ -130,5 +140,5 @@ extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
extern const struct export_operations cifs_export_ops;
#endif /* CONFIG_CIFS_NFSD_EXPORT */
#define CIFS_VERSION "2.02"
#define CIFS_VERSION "2.03"
#endif /* _CIFSFS_H */

8
fs/cifs/cifsglob.h
View File

@ -559,6 +559,7 @@ struct TCP_Server_Info {
int echo_credits; /* echo reserved slots */
int oplock_credits; /* oplock break reserved slots */
bool echoes:1; /* enable echoes */
__u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
#endif
u16 dialect; /* dialect index that server chose */
bool oplocks:1; /* enable oplocks */
@ -1113,12 +1114,13 @@ struct cifsInodeInfo {
__u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
unsigned int oplock; /* oplock/lease level we have */
unsigned int epoch; /* used to track lease state changes */
bool delete_pending; /* DELETE_ON_CLOSE is set */
bool invalid_mapping; /* pagecache is invalid */
unsigned long flags;
#define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
#define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
#define CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2 (2) /* Downgrade oplock to L2 */
#define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
#define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
#define CIFS_INO_LOCK (5) /* lock bit for synchronization */
unsigned long flags;
spinlock_t writers_lock;
unsigned int writers; /* Number of writers on this inode */
unsigned long time; /* jiffies of last update of inode */

5
fs/cifs/connect.c
View File

@ -2144,6 +2144,9 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
sizeof(tcp_ses->srcaddr));
memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
sizeof(tcp_ses->dstaddr));
#ifdef CONFIG_CIFS_SMB2
get_random_bytes(tcp_ses->client_guid, SMB2_CLIENT_GUID_SIZE);
#endif
/*
* at this point we are the only ones with the pointer
* to the struct since the kernel thread not created yet
@ -2225,7 +2228,7 @@ static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
vol->username ? vol->username : "",
CIFS_MAX_USERNAME_LEN))
return 0;
if (strlen(vol->username) != 0 &&
if ((vol->username && strlen(vol->username) != 0) &&
ses->password != NULL &&
strncmp(ses->password,
vol->password ? vol->password : "",

16
fs/cifs/file.c
View File

@ -335,7 +335,7 @@ cifs_new_fileinfo(struct cifs_fid *fid, struct file *file,
spin_unlock(&cifs_file_list_lock);
if (fid->purge_cache)
cifs_invalidate_mapping(inode);
cifs_zap_mapping(inode);
file->private_data = cfile;
return cfile;
@ -392,7 +392,7 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
* again and get at least level II oplock.
*/
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
CIFS_I(inode)->invalid_mapping = true;
set_bit(CIFS_INO_INVALID_MAPPING, &cifsi->flags);
cifs_set_oplock_level(cifsi, 0);
}
spin_unlock(&cifs_file_list_lock);
@ -1529,7 +1529,7 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type,
*/
if (!CIFS_CACHE_WRITE(CIFS_I(inode)) &&
CIFS_CACHE_READ(CIFS_I(inode))) {
cifs_invalidate_mapping(inode);
cifs_zap_mapping(inode);
cifs_dbg(FYI, "Set no oplock for inode=%p due to mand locks\n",
inode);
CIFS_I(inode)->oplock = 0;
@ -2218,7 +2218,7 @@ int cifs_strict_fsync(struct file *file, loff_t start, loff_t end,
file->f_path.dentry->d_name.name, datasync);
if (!CIFS_CACHE_READ(CIFS_I(inode))) {
rc = cifs_invalidate_mapping(inode);
rc = cifs_zap_mapping(inode);
if (rc) {
cifs_dbg(FYI, "rc: %d during invalidate phase\n", rc);
rc = 0; /* don't care about it in fsync */
@ -2562,7 +2562,7 @@ ssize_t cifs_user_writev(struct kiocb *iocb, const struct iovec *iov,
written = cifs_iovec_write(iocb->ki_filp, iov, nr_segs, &pos);
if (written > 0) {
CIFS_I(inode)->invalid_mapping = true;
set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
iocb->ki_pos = pos;
}
@ -2649,7 +2649,7 @@ cifs_strict_writev(struct kiocb *iocb, const struct iovec *iov,
* request comes - break it on the client to prevent reading
* an old data.
*/
cifs_invalidate_mapping(inode);
cifs_zap_mapping(inode);
cifs_dbg(FYI, "Set no oplock for inode=%p after a write operation\n",
inode);
cinode->oplock = 0;
@ -3112,7 +3112,7 @@ int cifs_file_strict_mmap(struct file *file, struct vm_area_struct *vma)
xid = get_xid();
if (!CIFS_CACHE_READ(CIFS_I(inode))) {
rc = cifs_invalidate_mapping(inode);
rc = cifs_zap_mapping(inode);
if (rc)
return rc;
}
@ -3670,7 +3670,7 @@ void cifs_oplock_break(struct work_struct *work)
if (!CIFS_CACHE_READ(cinode)) {
rc = filemap_fdatawait(inode->i_mapping);
mapping_set_error(inode->i_mapping, rc);
cifs_invalidate_mapping(inode);
cifs_zap_mapping(inode);
}
cifs_dbg(FYI, "Oplock flush inode %p rc %d\n", inode, rc);
}

71
fs/cifs/inode.c
View File

@ -22,6 +22,7 @@
#include <linux/stat.h>
#include <linux/slab.h>
#include <linux/pagemap.h>
#include <linux/freezer.h>
#include <asm/div64.h>
#include "cifsfs.h"
#include "cifspdu.h"
@ -117,7 +118,7 @@ cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr)
cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n",
__func__, cifs_i->uniqueid);
cifs_i->invalid_mapping = true;
set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags);
}
/*
@ -177,7 +178,10 @@ cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
else
cifs_i->time = jiffies;
cifs_i->delete_pending = fattr->cf_flags & CIFS_FATTR_DELETE_PENDING;
if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING)
set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
else
clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
cifs_i->server_eof = fattr->cf_eof;
/*
@ -1121,7 +1125,7 @@ cifs_rename_pending_delete(const char *full_path, struct dentry *dentry,
}
/* try to set DELETE_ON_CLOSE */
if (!cifsInode->delete_pending) {
if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) {
rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid,
current->tgid);
/*
@ -1138,7 +1142,7 @@ cifs_rename_pending_delete(const char *full_path, struct dentry *dentry,
rc = -EBUSY;
goto undo_rename;
}
cifsInode->delete_pending = true;
set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags);
}
out_close:
@ -1759,23 +1763,62 @@ int
cifs_invalidate_mapping(struct inode *inode)
{
int rc = 0;
struct cifsInodeInfo *cifs_i = CIFS_I(inode);
cifs_i->invalid_mapping = false;
if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
rc = invalidate_inode_pages2(inode->i_mapping);
if (rc) {
if (rc)
cifs_dbg(VFS, "%s: could not invalidate inode %p\n",
__func__, inode);
cifs_i->invalid_mapping = true;
}
}
cifs_fscache_reset_inode_cookie(inode);
return rc;
}
/**
* cifs_wait_bit_killable - helper for functions that are sleeping on bit locks
* @word: long word containing the bit lock
*/
static int
cifs_wait_bit_killable(void *word)
{
if (fatal_signal_pending(current))
return -ERESTARTSYS;
freezable_schedule_unsafe();
return 0;
}
int
cifs_revalidate_mapping(struct inode *inode)
{
int rc;
unsigned long *flags = &CIFS_I(inode)->flags;
rc = wait_on_bit_lock(flags, CIFS_INO_LOCK, cifs_wait_bit_killable,
TASK_KILLABLE);
if (rc)
return rc;
if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) {
rc = cifs_invalidate_mapping(inode);
if (rc)
set_bit(CIFS_INO_INVALID_MAPPING, flags);
}
clear_bit_unlock(CIFS_INO_LOCK, flags);
smp_mb__after_atomic();
wake_up_bit(flags, CIFS_INO_LOCK);
return rc;
}
int
cifs_zap_mapping(struct inode *inode)
{
set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
return cifs_revalidate_mapping(inode);
}
int cifs_revalidate_file_attr(struct file *filp)
{
int rc = 0;
@ -1842,9 +1885,7 @@ int cifs_revalidate_file(struct file *filp)
if (rc)
return rc;
if (CIFS_I(inode)->invalid_mapping)
rc = cifs_invalidate_mapping(inode);
return rc;
return cifs_revalidate_mapping(inode);
}
/* revalidate a dentry's inode attributes */
@ -1857,9 +1898,7 @@ int cifs_revalidate_dentry(struct dentry *dentry)
if (rc)
return rc;
if (CIFS_I(inode)->invalid_mapping)
rc = cifs_invalidate_mapping(inode);
return rc;
return cifs_revalidate_mapping(inode);
}
int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,

2
fs/cifs/ioctl.c
View File

@ -85,7 +85,7 @@ static long cifs_ioctl_clone(unsigned int xid, struct file *dst_file,
goto out_fput;
}
src_inode = src_file.file->f_dentry->d_inode;
src_inode = file_inode(src_file.file);
/*
* Note: cifs case is easier than btrfs since server responsible for

9
fs/cifs/netmisc.c
View File

@ -795,8 +795,8 @@ cifs_print_status(__u32 status_code)
while (nt_errs[idx].nt_errstr != NULL) {
if (((nt_errs[idx].nt_errcode) & 0xFFFFFF) ==
(status_code & 0xFFFFFF)) {
printk(KERN_NOTICE "Status code returned 0x%08x %s\n",
status_code, nt_errs[idx].nt_errstr);
pr_notice("Status code returned 0x%08x %s\n",
status_code, nt_errs[idx].nt_errstr);
}
idx++;
}
@ -941,8 +941,9 @@ cifs_UnixTimeToNT(struct timespec t)
return (u64) t.tv_sec * 10000000 + t.tv_nsec/100 + NTFS_TIME_OFFSET;
}
static int total_days_of_prev_months[] =
{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
static const int total_days_of_prev_months[] = {
0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
};
struct timespec cnvrtDosUnixTm(__le16 le_date, __le16 le_time, int offset)
{

2
fs/cifs/smb2ops.c
View File

@ -1047,6 +1047,7 @@ smb2_create_lease_buf(u8 *lease_key, u8 oplock)
buf->ccontext.NameOffset = cpu_to_le16(offsetof
(struct create_lease, Name));
buf->ccontext.NameLength = cpu_to_le16(4);
/* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
buf->Name[0] = 'R';
buf->Name[1] = 'q';
buf->Name[2] = 'L';
@ -1073,6 +1074,7 @@ smb3_create_lease_buf(u8 *lease_key, u8 oplock)
buf->ccontext.NameOffset = cpu_to_le16(offsetof
(struct create_lease_v2, Name));
buf->ccontext.NameLength = cpu_to_le16(4);
/* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
buf->Name[0] = 'R';
buf->Name[1] = 'q';
buf->Name[2] = 'L';

19
fs/cifs/smb2pdu.c
View File

@ -375,7 +375,12 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
memcpy(req->ClientGUID, cifs_client_guid, SMB2_CLIENT_GUID_SIZE);
/* ClientGUID must be zero for SMB2.02 dialect */
if (ses->server->vals->protocol_id == SMB20_PROT_ID)
memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
else
memcpy(req->ClientGUID, server->client_guid,
SMB2_CLIENT_GUID_SIZE);
iov[0].iov_base = (char *)req;
/* 4 for rfc1002 length field */
@ -478,7 +483,8 @@ int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
vneg_inbuf.Capabilities =
cpu_to_le32(tcon->ses->server->vals->req_capabilities);
memcpy(vneg_inbuf.Guid, cifs_client_guid, SMB2_CLIENT_GUID_SIZE);
memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
SMB2_CLIENT_GUID_SIZE);
if (tcon->ses->sign)
vneg_inbuf.SecurityMode =
@ -966,6 +972,7 @@ create_durable_buf(void)
buf->ccontext.NameOffset = cpu_to_le16(offsetof
(struct create_durable, Name));
buf->ccontext.NameLength = cpu_to_le16(4);
/* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
buf->Name[0] = 'D';
buf->Name[1] = 'H';
buf->Name[2] = 'n';
@ -990,6 +997,7 @@ create_reconnect_durable_buf(struct cifs_fid *fid)
buf->ccontext.NameLength = cpu_to_le16(4);
buf->Data.Fid.PersistentFileId = fid->persistent_fid;
buf->Data.Fid.VolatileFileId = fid->volatile_fid;
/* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
buf->Name[0] = 'D';
buf->Name[1] = 'H';
buf->Name[2] = 'n';
@ -1089,6 +1097,7 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
int rc = 0;
unsigned int num_iovecs = 2;
__u32 file_attributes = 0;
char *dhc_buf = NULL, *lc_buf = NULL;
cifs_dbg(FYI, "create/open\n");
@ -1155,6 +1164,7 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
kfree(copy_path);
return rc;
}
lc_buf = iov[num_iovecs-1].iov_base;
}
if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
@ -1169,9 +1179,10 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
if (rc) {
cifs_small_buf_release(req);
kfree(copy_path);
kfree(iov[num_iovecs-1].iov_base);
kfree(lc_buf);
return rc;
}
dhc_buf = iov[num_iovecs-1].iov_base;
}
rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
@ -1203,6 +1214,8 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
*oplock = rsp->OplockLevel;
creat_exit:
kfree(copy_path);
kfree(lc_buf);
kfree(dhc_buf);
free_rsp_buf(resp_buftype, rsp);
return rc;
}

8
fs/cifs/smb2pdu.h
View File

@ -183,8 +183,6 @@ struct smb2_symlink_err_rsp {
#define SMB2_CLIENT_GUID_SIZE 16
extern __u8 cifs_client_guid[SMB2_CLIENT_GUID_SIZE];
struct smb2_negotiate_req {
struct smb2_hdr hdr;
__le16 StructureSize; /* Must be 36 */
@ -437,11 +435,15 @@ struct smb2_tree_disconnect_rsp {
#define SMB2_CREATE_SD_BUFFER "SecD" /* security descriptor */
#define SMB2_CREATE_DURABLE_HANDLE_REQUEST "DHnQ"
#define SMB2_CREATE_DURABLE_HANDLE_RECONNECT "DHnC"
#define SMB2_CREATE_ALLOCATION_SIZE "AlSi"
#define SMB2_CREATE_ALLOCATION_SIZE "AISi"
#define SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST "MxAc"
#define SMB2_CREATE_TIMEWARP_REQUEST "TWrp"
#define SMB2_CREATE_QUERY_ON_DISK_ID "QFid"
#define SMB2_CREATE_REQUEST_LEASE "RqLs"
#define SMB2_CREATE_DURABLE_HANDLE_REQUEST_V2 "DH2Q"
#define SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 "DH2C"
#define SMB2_CREATE_APP_INSTANCE_ID 0x45BCA66AEFA7F74A9008FA462E144D74
#define SVHDX_OPEN_DEVICE_CONTEXT 0x83CE6F1AD851E0986E34401CC9BCFCE9
struct smb2_create_req {
struct smb2_hdr hdr;