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11 smb3 client fixes, mostly cleanup

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Merge tag '6.4-rc-smb3-client-fixes-part1' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:

 - deferred close fix for an important case when cached file should be
   closed immediately

 - two fixes for missing locks

 - eight minor cleanup

* tag '6.4-rc-smb3-client-fixes-part1' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: update internal module version number for cifs.ko
  smb3: move some common open context structs to smbfs_common
  smb3: make query_on_disk_id open context consistent and move to common code
  SMB3.1.1: add new tree connect ShareFlags
  cifs: missing lock when updating session status
  SMB3: Close deferred file handles in case of handle lease break
  SMB3: Add missing locks to protect deferred close file list
  cifs: Avoid a cast in add_lease_context()
  cifs: Simplify SMB2_open_init()
  cifs: Simplify SMB2_open_init()
  cifs: Simplify SMB2_open_init()
This commit is contained in:
Linus Torvalds 2023-05-01 10:43:44 -07:00
commit 26c009dffc
8 changed files with 110 additions and 152 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
fs/cifs/cifsfs.h
View File

@ -162,6 +162,6 @@ extern const struct export_operations cifs_export_ops;
#endif /* CONFIG_CIFS_NFSD_EXPORT */
/* when changing internal version - update following two lines at same time */
#define SMB3_PRODUCT_BUILD 41
#define CIFS_VERSION "2.42"
#define SMB3_PRODUCT_BUILD 43
#define CIFS_VERSION "2.43"
#endif /* _CIFSFS_H */

8
fs/cifs/connect.c
View File

@ -1916,18 +1916,22 @@ void cifs_put_smb_ses(struct cifs_ses *ses)
/* ses_count can never go negative */
WARN_ON(ses->ses_count < 0);
spin_lock(&ses->ses_lock);
if (ses->ses_status == SES_GOOD)
ses->ses_status = SES_EXITING;
cifs_free_ipc(ses);
if (ses->ses_status == SES_EXITING && server->ops->logoff) {
spin_unlock(&ses->ses_lock);
cifs_free_ipc(ses);
xid = get_xid();
rc = server->ops->logoff(xid, ses);
if (rc)
cifs_server_dbg(VFS, "%s: Session Logoff failure rc=%d\n",
__func__, rc);
_free_xid(xid);
} else {
spin_unlock(&ses->ses_lock);
cifs_free_ipc(ses);
}
spin_lock(&cifs_tcp_ses_lock);

16
fs/cifs/file.c
View File

@ -4882,6 +4882,8 @@ void cifs_oplock_break(struct work_struct *work)
struct TCP_Server_Info *server = tcon->ses->server;
int rc = 0;
bool purge_cache = false;
struct cifs_deferred_close *dclose;
bool is_deferred = false;
wait_on_bit(&cinode->flags, CIFS_INODE_PENDING_WRITERS,
TASK_UNINTERRUPTIBLE);
@ -4917,6 +4919,20 @@ void cifs_oplock_break(struct work_struct *work)
cifs_dbg(VFS, "Push locks rc = %d\n", rc);
oplock_break_ack:
/*
* When oplock break is received and there are no active
* file handles but cached, then schedule deferred close immediately.
* So, new open will not use cached handle.
*/
spin_lock(&CIFS_I(inode)->deferred_lock);
is_deferred = cifs_is_deferred_close(cfile, &dclose);
spin_unlock(&CIFS_I(inode)->deferred_lock);
if (!CIFS_CACHE_HANDLE(cinode) && is_deferred &&
cfile->deferred_close_scheduled && delayed_work_pending(&cfile->deferred)) {
cifs_close_deferred_file(cinode);
}
/*
* releasing stale oplock after recent reconnect of smb session using
* a now incorrect file handle is not a data integrity issue but do

8
fs/cifs/misc.c
View File

@ -749,7 +749,9 @@ cifs_close_deferred_file(struct cifsInodeInfo *cifs_inode)
list_for_each_entry(cfile, &cifs_inode->openFileList, flist) {
if (delayed_work_pending(&cfile->deferred)) {
if (cancel_delayed_work(&cfile->deferred)) {
spin_lock(&cifs_inode->deferred_lock);
cifs_del_deferred_close(cfile);
spin_unlock(&cifs_inode->deferred_lock);
tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC);
if (tmp_list == NULL)
@ -762,7 +764,7 @@ cifs_close_deferred_file(struct cifsInodeInfo *cifs_inode)
spin_unlock(&cifs_inode->open_file_lock);
list_for_each_entry_safe(tmp_list, tmp_next_list, &file_head, list) {
_cifsFileInfo_put(tmp_list->cfile, true, false);
_cifsFileInfo_put(tmp_list->cfile, false, false);
list_del(&tmp_list->list);
kfree(tmp_list);
}
@ -780,7 +782,9 @@ cifs_close_all_deferred_files(struct cifs_tcon *tcon)
list_for_each_entry(cfile, &tcon->openFileList, tlist) {
if (delayed_work_pending(&cfile->deferred)) {
if (cancel_delayed_work(&cfile->deferred)) {
spin_lock(&CIFS_I(d_inode(cfile->dentry))->deferred_lock);
cifs_del_deferred_close(cfile);
spin_unlock(&CIFS_I(d_inode(cfile->dentry))->deferred_lock);
tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC);
if (tmp_list == NULL)
@ -815,7 +819,9 @@ cifs_close_deferred_file_under_dentry(struct cifs_tcon *tcon, const char *path)
if (strstr(full_path, path)) {
if (delayed_work_pending(&cfile->deferred)) {
if (cancel_delayed_work(&cfile->deferred)) {
spin_lock(&CIFS_I(d_inode(cfile->dentry))->deferred_lock);
cifs_del_deferred_close(cfile);
spin_unlock(&CIFS_I(d_inode(cfile->dentry))->deferred_lock);
tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC);
if (tmp_list == NULL)

117
fs/cifs/smb2pdu.c
View File

@ -821,7 +821,6 @@ create_posix_buf(umode_t mode)
static int
add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode)
{
struct smb2_create_req *req = iov[0].iov_base;
unsigned int num = *num_iovec;
iov[num].iov_base = create_posix_buf(mode);
@ -830,11 +829,6 @@ add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode)
if (iov[num].iov_base == NULL)
return -ENOMEM;
iov[num].iov_len = sizeof(struct create_posix);
if (!req->CreateContextsOffset)
req->CreateContextsOffset = cpu_to_le32(
sizeof(struct smb2_create_req) +
iov[num - 1].iov_len);
le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_posix));
*num_iovec = num + 1;
return 0;
}
@ -2069,7 +2063,7 @@ create_reconnect_durable_buf(struct cifs_fid *fid)
static void
parse_query_id_ctxt(struct create_context *cc, struct smb2_file_all_info *buf)
{
struct create_on_disk_id *pdisk_id = (struct create_on_disk_id *)cc;
struct create_disk_id_rsp *pdisk_id = (struct create_disk_id_rsp *)cc;
cifs_dbg(FYI, "parse query id context 0x%llx 0x%llx\n",
pdisk_id->DiskFileId, pdisk_id->VolumeId);
@ -2172,10 +2166,11 @@ smb2_parse_contexts(struct TCP_Server_Info *server,
}
static int
add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
add_lease_context(struct TCP_Server_Info *server,
struct smb2_create_req *req,
struct kvec *iov,
unsigned int *num_iovec, u8 *lease_key, __u8 *oplock)
{
struct smb2_create_req *req = iov[0].iov_base;
unsigned int num = *num_iovec;
iov[num].iov_base = server->ops->create_lease_buf(lease_key, *oplock);
@ -2183,12 +2178,6 @@ add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
return -ENOMEM;
iov[num].iov_len = server->vals->create_lease_size;
req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
if (!req->CreateContextsOffset)
req->CreateContextsOffset = cpu_to_le32(
sizeof(struct smb2_create_req) +
iov[num - 1].iov_len);
le32_add_cpu(&req->CreateContextsLength,
server->vals->create_lease_size);
*num_iovec = num + 1;
return 0;
}
@ -2267,18 +2256,12 @@ static int
add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
struct cifs_open_parms *oparms)
{
struct smb2_create_req *req = iov[0].iov_base;
unsigned int num = *num_iovec;
iov[num].iov_base = create_durable_v2_buf(oparms);
if (iov[num].iov_base == NULL)
return -ENOMEM;
iov[num].iov_len = sizeof(struct create_durable_v2);
if (!req->CreateContextsOffset)
req->CreateContextsOffset =
cpu_to_le32(sizeof(struct smb2_create_req) +
iov[1].iov_len);
le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
*num_iovec = num + 1;
return 0;
}
@ -2287,7 +2270,6 @@ static int
add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
struct cifs_open_parms *oparms)
{
struct smb2_create_req *req = iov[0].iov_base;
unsigned int num = *num_iovec;
/* indicate that we don't need to relock the file */
@ -2297,12 +2279,6 @@ add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
if (iov[num].iov_base == NULL)
return -ENOMEM;
iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
if (!req->CreateContextsOffset)
req->CreateContextsOffset =
cpu_to_le32(sizeof(struct smb2_create_req) +
iov[1].iov_len);
le32_add_cpu(&req->CreateContextsLength,
sizeof(struct create_durable_handle_reconnect_v2));
*num_iovec = num + 1;
return 0;
}
@ -2311,7 +2287,6 @@ static int
add_durable_context(struct kvec *iov, unsigned int *num_iovec,
struct cifs_open_parms *oparms, bool use_persistent)
{
struct smb2_create_req *req = iov[0].iov_base;
unsigned int num = *num_iovec;
if (use_persistent) {
@ -2331,11 +2306,6 @@ add_durable_context(struct kvec *iov, unsigned int *num_iovec,
if (iov[num].iov_base == NULL)
return -ENOMEM;
iov[num].iov_len = sizeof(struct create_durable);
if (!req->CreateContextsOffset)
req->CreateContextsOffset =
cpu_to_le32(sizeof(struct smb2_create_req) +
iov[1].iov_len);
le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
*num_iovec = num + 1;
return 0;
}
@ -2369,18 +2339,12 @@ create_twarp_buf(__u64 timewarp)
static int
add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp)
{
struct smb2_create_req *req = iov[0].iov_base;
unsigned int num = *num_iovec;
iov[num].iov_base = create_twarp_buf(timewarp);
if (iov[num].iov_base == NULL)
return -ENOMEM;
iov[num].iov_len = sizeof(struct crt_twarp_ctxt);
if (!req->CreateContextsOffset)
req->CreateContextsOffset = cpu_to_le32(
sizeof(struct smb2_create_req) +
iov[num - 1].iov_len);
le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_twarp_ctxt));
*num_iovec = num + 1;
return 0;
}
@ -2503,7 +2467,6 @@ create_sd_buf(umode_t mode, bool set_owner, unsigned int *len)
static int
add_sd_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode, bool set_owner)
{
struct smb2_create_req *req = iov[0].iov_base;
unsigned int num = *num_iovec;
unsigned int len = 0;
@ -2511,11 +2474,6 @@ add_sd_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode, bool set
if (iov[num].iov_base == NULL)
return -ENOMEM;
iov[num].iov_len = len;
if (!req->CreateContextsOffset)
req->CreateContextsOffset = cpu_to_le32(
sizeof(struct smb2_create_req) +
iov[num - 1].iov_len);
le32_add_cpu(&req->CreateContextsLength, len);
*num_iovec = num + 1;
return 0;
}
@ -2546,18 +2504,12 @@ create_query_id_buf(void)
static int
add_query_id_context(struct kvec *iov, unsigned int *num_iovec)
{
struct smb2_create_req *req = iov[0].iov_base;
unsigned int num = *num_iovec;
iov[num].iov_base = create_query_id_buf();
if (iov[num].iov_base == NULL)
return -ENOMEM;
iov[num].iov_len = sizeof(struct crt_query_id_ctxt);
if (!req->CreateContextsOffset)
req->CreateContextsOffset = cpu_to_le32(
sizeof(struct smb2_create_req) +
iov[num - 1].iov_len);
le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_query_id_ctxt));
*num_iovec = num + 1;
return 0;
}
@ -2720,6 +2672,9 @@ int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
rc = add_posix_context(iov, &n_iov, mode);
if (rc)
goto err_free_req;
req->CreateContextsOffset = cpu_to_le32(
sizeof(struct smb2_create_req) +
iov[1].iov_len);
pc_buf = iov[n_iov-1].iov_base;
}
@ -2857,21 +2812,13 @@ SMB2_open_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
(oparms->create_options & CREATE_NOT_FILE))
req->RequestedOplockLevel = *oplock; /* no srv lease support */
else {
rc = add_lease_context(server, iov, &n_iov,
rc = add_lease_context(server, req, iov, &n_iov,
oparms->fid->lease_key, oplock);
if (rc)
return rc;
}
if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
/* need to set Next field of lease context if we request it */
if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
struct create_context *ccontext =
(struct create_context *)iov[n_iov-1].iov_base;
ccontext->Next =
cpu_to_le32(server->vals->create_lease_size);
}
rc = add_durable_context(iov, &n_iov, oparms,
tcon->use_persistent);
if (rc)
@ -2879,13 +2826,6 @@ SMB2_open_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
}
if (tcon->posix_extensions) {
if (n_iov > 2) {
struct create_context *ccontext =
(struct create_context *)iov[n_iov-1].iov_base;
ccontext->Next =
cpu_to_le32(iov[n_iov-1].iov_len);
}
rc = add_posix_context(iov, &n_iov, oparms->mode);
if (rc)
return rc;
@ -2893,13 +2833,6 @@ SMB2_open_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
if (tcon->snapshot_time) {
cifs_dbg(FYI, "adding snapshot context\n");
if (n_iov > 2) {
struct create_context *ccontext =
(struct create_context *)iov[n_iov-1].iov_base;
ccontext->Next =
cpu_to_le32(iov[n_iov-1].iov_len);
}
rc = add_twarp_context(iov, &n_iov, tcon->snapshot_time);
if (rc)
return rc;
@ -2923,12 +2856,6 @@ SMB2_open_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
set_owner = false;
if (set_owner | set_mode) {
if (n_iov > 2) {
struct create_context *ccontext =
(struct create_context *)iov[n_iov-1].iov_base;
ccontext->Next = cpu_to_le32(iov[n_iov-1].iov_len);
}
cifs_dbg(FYI, "add sd with mode 0x%x\n", oparms->mode);
rc = add_sd_context(iov, &n_iov, oparms->mode, set_owner);
if (rc)
@ -2936,13 +2863,31 @@ SMB2_open_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
}
}
if (n_iov > 2) {
struct create_context *ccontext =
(struct create_context *)iov[n_iov-1].iov_base;
ccontext->Next = cpu_to_le32(iov[n_iov-1].iov_len);
}
add_query_id_context(iov, &n_iov);
if (n_iov > 2) {
/*
* We have create contexts behind iov[1] (the file
* name), point at them from the main create request
*/
req->CreateContextsOffset = cpu_to_le32(
sizeof(struct smb2_create_req) +
iov[1].iov_len);
req->CreateContextsLength = 0;
for (unsigned int i = 2; i < (n_iov-1); i++) {
struct kvec *v = &iov[i];
size_t len = v->iov_len;
struct create_context *cctx =
(struct create_context *)v->iov_base;
cctx->Next = cpu_to_le32(len);
le32_add_cpu(&req->CreateContextsLength, len);
}
le32_add_cpu(&req->CreateContextsLength,
iov[n_iov-1].iov_len);
}
rqst->rq_nvec = n_iov;
return 0;
}

20
fs/cifs/smb2pdu.h
View File

@ -132,17 +132,6 @@ struct share_redirect_error_context_rsp {
#define SMB2_LEASE_HANDLE_CACHING_HE 0x02
#define SMB2_LEASE_WRITE_CACHING_HE 0x04
struct create_durable {
struct create_context ccontext;
__u8 Name[8];
union {
__u8 Reserved[16];
struct {
__u64 PersistentFileId;
__u64 VolatileFileId;
} Fid;
} Data;
} __packed;
/* See MS-SMB2 2.2.13.2.11 */
/* Flags */
@ -170,15 +159,6 @@ struct durable_reconnect_context_v2 {
__le32 Flags; /* see above DHANDLE_FLAG_PERSISTENT */
} __packed;
/* See MS-SMB2 2.2.14.2.9 */
struct create_on_disk_id {
struct create_context ccontext;
__u8 Name[8];
__le64 DiskFileId;
__le64 VolumeId;
__u32 Reserved[4];
} __packed;
/* See MS-SMB2 2.2.14.2.12 */
struct durable_reconnect_context_v2_rsp {
__le32 Timeout;

33
fs/ksmbd/smb2pdu.h
View File

@ -70,18 +70,6 @@ struct create_durable_req_v2 {
__u8 CreateGuid[16];
} __packed;
struct create_durable_reconn_req {
struct create_context ccontext;
__u8 Name[8];
union {
__u8 Reserved[16];
struct {
__u64 PersistentFileId;
__u64 VolatileFileId;
} Fid;
} Data;
} __packed;
struct create_durable_reconn_v2_req {
struct create_context ccontext;
__u8 Name[8];
@ -109,12 +97,6 @@ struct create_app_inst_id_vers {
__le64 AppInstanceVersionLow;
} __packed;
struct create_mxac_req {
struct create_context ccontext;
__u8 Name[8];
__le64 Timestamp;
} __packed;
struct create_alloc_size_req {
struct create_context ccontext;
__u8 Name[8];
@ -137,21 +119,6 @@ struct create_durable_v2_rsp {
__le32 Flags;
} __packed;
struct create_mxac_rsp {
struct create_context ccontext;
__u8 Name[8];
__le32 QueryStatus;
__le32 MaximalAccess;
} __packed;
struct create_disk_id_rsp {
struct create_context ccontext;
__u8 Name[8];
__le64 DiskFileId;
__le64 VolumeId;
__u8 Reserved[16];
} __packed;
/* equivalent of the contents of SMB3.1.1 POSIX open context response */
struct create_posix_rsp {
struct create_context ccontext;

56
fs/smbfs_common/smb2pdu.h
View File

@ -327,17 +327,18 @@ struct smb2_tree_connect_req {
#define SMB2_SHAREFLAG_NO_CACHING 0x00000030
#define SHI1005_FLAGS_DFS 0x00000001
#define SHI1005_FLAGS_DFS_ROOT 0x00000002
#define SHI1005_FLAGS_RESTRICT_EXCLUSIVE_OPENS 0x00000100
#define SHI1005_FLAGS_FORCE_SHARED_DELETE 0x00000200
#define SHI1005_FLAGS_ALLOW_NAMESPACE_CACHING 0x00000400
#define SHI1005_FLAGS_ACCESS_BASED_DIRECTORY_ENUM 0x00000800
#define SHI1005_FLAGS_FORCE_LEVELII_OPLOCK 0x00001000
#define SHI1005_FLAGS_ENABLE_HASH_V1 0x00002000
#define SHI1005_FLAGS_ENABLE_HASH_V2 0x00004000
#define SMB2_SHAREFLAG_RESTRICT_EXCLUSIVE_OPENS 0x00000100
#define SMB2_SHAREFLAG_FORCE_SHARED_DELETE 0x00000200
#define SMB2_SHAREFLAG_ALLOW_NAMESPACE_CACHING 0x00000400
#define SMB2_SHAREFLAG_ACCESS_BASED_DIRECTORY_ENUM 0x00000800
#define SMB2_SHAREFLAG_FORCE_LEVELII_OPLOCK 0x00001000
#define SMB2_SHAREFLAG_ENABLE_HASH_V1 0x00002000
#define SMB2_SHAREFLAG_ENABLE_HASH_V2 0x00004000
#define SHI1005_FLAGS_ENCRYPT_DATA 0x00008000
#define SMB2_SHAREFLAG_IDENTITY_REMOTING 0x00040000 /* 3.1.1 */
#define SMB2_SHAREFLAG_COMPRESS_DATA 0x00100000 /* 3.1.1 */
#define SHI1005_FLAGS_ALL 0x0014FF33
#define SMB2_SHAREFLAG_ISOLATED_TRANSPORT 0x00200000
#define SHI1005_FLAGS_ALL 0x0034FF33
/* Possible share capabilities */
#define SMB2_SHARE_CAP_DFS cpu_to_le32(0x00000008) /* all dialects */
@ -1171,6 +1172,34 @@ struct create_posix {
__u32 Reserved;
} __packed;
/* See MS-SMB2 2.2.13.2.3 and MS-SMB2 2.2.13.2.4 */
struct create_durable {
struct create_context ccontext;
__u8 Name[8];
union {
__u8 Reserved[16];
struct {
__u64 PersistentFileId;
__u64 VolatileFileId;
} Fid;
} Data;
} __packed;
/* See MS-SMB2 2.2.13.2.5 */
struct create_mxac_req {
struct create_context ccontext;
__u8 Name[8];
__le64 Timestamp;
} __packed;
/* See MS-SMB2 2.2.14.2.5 */
struct create_mxac_rsp {
struct create_context ccontext;
__u8 Name[8];
__le32 QueryStatus;
__le32 MaximalAccess;
} __packed;
#define SMB2_LEASE_NONE_LE cpu_to_le32(0x00)
#define SMB2_LEASE_READ_CACHING_LE cpu_to_le32(0x01)
#define SMB2_LEASE_HANDLE_CACHING_LE cpu_to_le32(0x02)
@ -1180,6 +1209,7 @@ struct create_posix {
#define SMB2_LEASE_KEY_SIZE 16
/* See MS-SMB2 2.2.13.2.8 */
struct lease_context {
__u8 LeaseKey[SMB2_LEASE_KEY_SIZE];
__le32 LeaseState;
@ -1187,6 +1217,7 @@ struct lease_context {
__le64 LeaseDuration;
} __packed;
/* See MS-SMB2 2.2.13.2.10 */
struct lease_context_v2 {
__u8 LeaseKey[SMB2_LEASE_KEY_SIZE];
__le32 LeaseState;
@ -1210,6 +1241,15 @@ struct create_lease_v2 {
__u8 Pad[4];
} __packed;
/* See MS-SMB2 2.2.14.2.9 */
struct create_disk_id_rsp {
struct create_context ccontext;
__u8 Name[8];
__le64 DiskFileId;
__le64 VolumeId;
__u8 Reserved[16];
} __packed;
/* See MS-SMB2 2.2.31 and 2.2.32 */
struct smb2_ioctl_req {
struct smb2_hdr hdr;