summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--fs/smb/client/asn1.c2
-rw-r--r--fs/smb/client/cifs_spnego.c4
-rw-r--r--fs/smb/client/cifsacl.c25
-rw-r--r--fs/smb/client/cifsfs.c6
-rw-r--r--fs/smb/client/cifsfs.h4
-rw-r--r--fs/smb/client/cifsglob.h62
-rw-r--r--fs/smb/client/cifspdu.h102
-rw-r--r--fs/smb/client/cifsproto.h4
-rw-r--r--fs/smb/client/cifssmb.c4
-rw-r--r--fs/smb/client/connect.c4
-rw-r--r--fs/smb/client/fs_context.c104
-rw-r--r--fs/smb/client/fs_context.h21
-rw-r--r--fs/smb/client/inode.c7
-rw-r--r--fs/smb/client/link.c60
-rw-r--r--fs/smb/client/netmisc.c10
-rw-r--r--fs/smb/client/nterr.c1
-rw-r--r--fs/smb/client/nterr.h1
-rw-r--r--fs/smb/client/reparse.c517
-rw-r--r--fs/smb/client/reparse.h2
-rw-r--r--fs/smb/client/sess.c3
-rw-r--r--fs/smb/client/smb1ops.c30
-rw-r--r--fs/smb/client/smb2file.c52
-rw-r--r--fs/smb/client/smb2inode.c5
-rw-r--r--fs/smb/client/smb2maperror.c4
-rw-r--r--fs/smb/client/smb2ops.c23
-rw-r--r--fs/smb/client/smb2pdu.c2
-rw-r--r--fs/smb/client/smb2proto.h3
-rw-r--r--fs/smb/common/smb2pdu.h14
28 files changed, 884 insertions, 192 deletions
diff --git a/fs/smb/client/asn1.c b/fs/smb/client/asn1.c
index b5724ef9f182..214a44509e7b 100644
--- a/fs/smb/client/asn1.c
+++ b/fs/smb/client/asn1.c
@@ -52,6 +52,8 @@ int cifs_neg_token_init_mech_type(void *context, size_t hdrlen,
server->sec_kerberos = true;
else if (oid == OID_ntlmssp)
server->sec_ntlmssp = true;
+ else if (oid == OID_IAKerb)
+ server->sec_iakerb = true;
else {
char buf[50];
diff --git a/fs/smb/client/cifs_spnego.c b/fs/smb/client/cifs_spnego.c
index 28f568b5fc27..bc1c1e9b288a 100644
--- a/fs/smb/client/cifs_spnego.c
+++ b/fs/smb/client/cifs_spnego.c
@@ -138,11 +138,13 @@ cifs_get_spnego_key(struct cifs_ses *sesInfo,
dp = description + strlen(description);
- /* for now, only sec=krb5 and sec=mskrb5 are valid */
+ /* for now, only sec=krb5 and sec=mskrb5 and iakerb are valid */
if (server->sec_kerberos)
sprintf(dp, ";sec=krb5");
else if (server->sec_mskerberos)
sprintf(dp, ";sec=mskrb5");
+ else if (server->sec_iakerb)
+ sprintf(dp, ";sec=iakerb");
else {
cifs_dbg(VFS, "unknown or missing server auth type, use krb5\n");
sprintf(dp, ";sec=krb5");
diff --git a/fs/smb/client/cifsacl.c b/fs/smb/client/cifsacl.c
index ba79aa2107cc..699a3f76d083 100644
--- a/fs/smb/client/cifsacl.c
+++ b/fs/smb/client/cifsacl.c
@@ -1395,7 +1395,7 @@ chown_chgrp_exit:
#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
struct smb_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb,
const struct cifs_fid *cifsfid, u32 *pacllen,
- u32 __maybe_unused unused)
+ u32 info)
{
struct smb_ntsd *pntsd = NULL;
unsigned int xid;
@@ -1407,7 +1407,7 @@ struct smb_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb,
xid = get_xid();
rc = CIFSSMBGetCIFSACL(xid, tlink_tcon(tlink), cifsfid->netfid, &pntsd,
- pacllen);
+ pacllen, info);
free_xid(xid);
cifs_put_tlink(tlink);
@@ -1419,7 +1419,7 @@ struct smb_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb,
}
static struct smb_ntsd *get_cifs_acl_by_path(struct cifs_sb_info *cifs_sb,
- const char *path, u32 *pacllen)
+ const char *path, u32 *pacllen, u32 info)
{
struct smb_ntsd *pntsd = NULL;
int oplock = 0;
@@ -1446,9 +1446,12 @@ static struct smb_ntsd *get_cifs_acl_by_path(struct cifs_sb_info *cifs_sb,
.fid = &fid,
};
+ if (info & SACL_SECINFO)
+ oparms.desired_access |= SYSTEM_SECURITY;
+
rc = CIFS_open(xid, &oparms, &oplock, NULL);
if (!rc) {
- rc = CIFSSMBGetCIFSACL(xid, tcon, fid.netfid, &pntsd, pacllen);
+ rc = CIFSSMBGetCIFSACL(xid, tcon, fid.netfid, &pntsd, pacllen, info);
CIFSSMBClose(xid, tcon, fid.netfid);
}
@@ -1472,7 +1475,7 @@ struct smb_ntsd *get_cifs_acl(struct cifs_sb_info *cifs_sb,
if (inode)
open_file = find_readable_file(CIFS_I(inode), true);
if (!open_file)
- return get_cifs_acl_by_path(cifs_sb, path, pacllen);
+ return get_cifs_acl_by_path(cifs_sb, path, pacllen, info);
pntsd = get_cifs_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
cifsFileInfo_put(open_file);
@@ -1485,7 +1488,7 @@ int set_cifs_acl(struct smb_ntsd *pnntsd, __u32 acllen,
{
int oplock = 0;
unsigned int xid;
- int rc, access_flags;
+ int rc, access_flags = 0;
struct cifs_tcon *tcon;
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
@@ -1498,10 +1501,12 @@ int set_cifs_acl(struct smb_ntsd *pnntsd, __u32 acllen,
tcon = tlink_tcon(tlink);
xid = get_xid();
- if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
- access_flags = WRITE_OWNER;
- else
- access_flags = WRITE_DAC;
+ if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
+ access_flags |= WRITE_OWNER;
+ if (aclflag & CIFS_ACL_SACL)
+ access_flags |= SYSTEM_SECURITY;
+ if (aclflag & CIFS_ACL_DACL)
+ access_flags |= WRITE_DAC;
oparms = (struct cifs_open_parms) {
.tcon = tcon,
diff --git a/fs/smb/client/cifsfs.c b/fs/smb/client/cifsfs.c
index b800c9f585d8..6a3bd652d251 100644
--- a/fs/smb/client/cifsfs.c
+++ b/fs/smb/client/cifsfs.c
@@ -715,6 +715,12 @@ cifs_show_options(struct seq_file *s, struct dentry *root)
cifs_sb->ctx->backupgid));
seq_show_option(s, "reparse",
cifs_reparse_type_str(cifs_sb->ctx->reparse_type));
+ if (cifs_sb->ctx->nonativesocket)
+ seq_puts(s, ",nonativesocket");
+ else
+ seq_puts(s, ",nativesocket");
+ seq_show_option(s, "symlink",
+ cifs_symlink_type_str(get_cifs_symlink_type(cifs_sb)));
seq_printf(s, ",rsize=%u", cifs_sb->ctx->rsize);
seq_printf(s, ",wsize=%u", cifs_sb->ctx->wsize);
diff --git a/fs/smb/client/cifsfs.h b/fs/smb/client/cifsfs.h
index a762dbbbd959..831fee962c4d 100644
--- a/fs/smb/client/cifsfs.h
+++ b/fs/smb/client/cifsfs.h
@@ -146,6 +146,6 @@ 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 52
-#define CIFS_VERSION "2.52"
+#define SMB3_PRODUCT_BUILD 53
+#define CIFS_VERSION "2.53"
#endif /* _CIFSFS_H */
diff --git a/fs/smb/client/cifsglob.h b/fs/smb/client/cifsglob.h
index 49ffc040f736..a68434ad744a 100644
--- a/fs/smb/client/cifsglob.h
+++ b/fs/smb/client/cifsglob.h
@@ -151,6 +151,7 @@ enum securityEnum {
NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
Kerberos, /* Kerberos via SPNEGO */
+ IAKerb, /* Kerberos proxy */
};
enum upcall_target_enum {
@@ -160,6 +161,7 @@ enum upcall_target_enum {
};
enum cifs_reparse_type {
+ CIFS_REPARSE_TYPE_NONE,
CIFS_REPARSE_TYPE_NFS,
CIFS_REPARSE_TYPE_WSL,
CIFS_REPARSE_TYPE_DEFAULT = CIFS_REPARSE_TYPE_NFS,
@@ -168,6 +170,8 @@ enum cifs_reparse_type {
static inline const char *cifs_reparse_type_str(enum cifs_reparse_type type)
{
switch (type) {
+ case CIFS_REPARSE_TYPE_NONE:
+ return "none";
case CIFS_REPARSE_TYPE_NFS:
return "nfs";
case CIFS_REPARSE_TYPE_WSL:
@@ -177,6 +181,39 @@ static inline const char *cifs_reparse_type_str(enum cifs_reparse_type type)
}
}
+enum cifs_symlink_type {
+ CIFS_SYMLINK_TYPE_DEFAULT,
+ CIFS_SYMLINK_TYPE_NONE,
+ CIFS_SYMLINK_TYPE_NATIVE,
+ CIFS_SYMLINK_TYPE_UNIX,
+ CIFS_SYMLINK_TYPE_MFSYMLINKS,
+ CIFS_SYMLINK_TYPE_SFU,
+ CIFS_SYMLINK_TYPE_NFS,
+ CIFS_SYMLINK_TYPE_WSL,
+};
+
+static inline const char *cifs_symlink_type_str(enum cifs_symlink_type type)
+{
+ switch (type) {
+ case CIFS_SYMLINK_TYPE_NONE:
+ return "none";
+ case CIFS_SYMLINK_TYPE_NATIVE:
+ return "native";
+ case CIFS_SYMLINK_TYPE_UNIX:
+ return "unix";
+ case CIFS_SYMLINK_TYPE_MFSYMLINKS:
+ return "mfsymlinks";
+ case CIFS_SYMLINK_TYPE_SFU:
+ return "sfu";
+ case CIFS_SYMLINK_TYPE_NFS:
+ return "nfs";
+ case CIFS_SYMLINK_TYPE_WSL:
+ return "wsl";
+ default:
+ return "unknown";
+ }
+}
+
struct session_key {
unsigned int len;
char *response;
@@ -215,10 +252,7 @@ struct cifs_cred {
struct cifs_open_info_data {
bool adjust_tz;
- union {
- bool reparse_point;
- bool symlink;
- };
+ bool reparse_point;
struct {
/* ioctl response buffer */
struct {
@@ -226,10 +260,7 @@ struct cifs_open_info_data {
struct kvec iov;
} io;
__u32 tag;
- union {
- struct reparse_data_buffer *buf;
- struct reparse_posix_data *posix;
- };
+ struct reparse_data_buffer *buf;
} reparse;
struct {
__u8 eas[SMB2_WSL_MAX_QUERY_EA_RESP_SIZE];
@@ -751,6 +782,7 @@ struct TCP_Server_Info {
bool sec_kerberosu2u; /* supports U2U Kerberos */
bool sec_kerberos; /* supports plain Kerberos */
bool sec_mskerberos; /* supports legacy MS Kerberos */
+ bool sec_iakerb; /* supports pass-through auth for Kerberos (krb5 proxy) */
bool large_buf; /* is current buffer large? */
/* use SMBD connection instead of socket */
bool rdma;
@@ -2118,6 +2150,8 @@ static inline char *get_security_type_str(enum securityEnum sectype)
return "Kerberos";
case NTLMv2:
return "NTLMv2";
+ case IAKerb:
+ return "IAKerb";
default:
return "Unknown";
}
@@ -2173,11 +2207,13 @@ static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses)
static inline void move_cifs_info_to_smb2(struct smb2_file_all_info *dst, const FILE_ALL_INFO *src)
{
- memcpy(dst, src, (size_t)((u8 *)&src->AccessFlags - (u8 *)src));
- dst->AccessFlags = src->AccessFlags;
- dst->CurrentByteOffset = src->CurrentByteOffset;
- dst->Mode = src->Mode;
- dst->AlignmentRequirement = src->AlignmentRequirement;
+ memcpy(dst, src, (size_t)((u8 *)&src->EASize - (u8 *)src));
+ dst->IndexNumber = 0;
+ dst->EASize = src->EASize;
+ dst->AccessFlags = 0;
+ dst->CurrentByteOffset = 0;
+ dst->Mode = 0;
+ dst->AlignmentRequirement = 0;
dst->FileNameLength = src->FileNameLength;
}
diff --git a/fs/smb/client/cifspdu.h b/fs/smb/client/cifspdu.h
index 5c047b00516f..48d0d6f439cf 100644
--- a/fs/smb/client/cifspdu.h
+++ b/fs/smb/client/cifspdu.h
@@ -190,42 +190,82 @@
*/
#define FILE_READ_DATA 0x00000001 /* Data can be read from the file */
+ /* or directory child entries can */
+ /* be listed together with the */
+ /* associated child attributes */
+ /* (so the FILE_READ_ATTRIBUTES on */
+ /* the child entry is not needed) */
#define FILE_WRITE_DATA 0x00000002 /* Data can be written to the file */
+ /* or new file can be created in */
+ /* the directory */
#define FILE_APPEND_DATA 0x00000004 /* Data can be appended to the file */
+ /* (for non-local files over SMB it */
+ /* is same as FILE_WRITE_DATA) */
+ /* or new subdirectory can be */
+ /* created in the directory */
#define FILE_READ_EA 0x00000008 /* Extended attributes associated */
/* with the file can be read */
#define FILE_WRITE_EA 0x00000010 /* Extended attributes associated */
/* with the file can be written */
#define FILE_EXECUTE 0x00000020 /*Data can be read into memory from */
/* the file using system paging I/O */
-#define FILE_DELETE_CHILD 0x00000040
+ /* for executing the file / script */
+ /* or right to traverse directory */
+ /* (but by default all users have */
+ /* directory bypass traverse */
+ /* privilege and do not need this */
+ /* permission on directories at all)*/
+#define FILE_DELETE_CHILD 0x00000040 /* Child entry can be deleted from */
+ /* the directory (so the DELETE on */
+ /* the child entry is not needed) */
#define FILE_READ_ATTRIBUTES 0x00000080 /* Attributes associated with the */
- /* file can be read */
+ /* file or directory can be read */
#define FILE_WRITE_ATTRIBUTES 0x00000100 /* Attributes associated with the */
- /* file can be written */
-#define DELETE 0x00010000 /* The file can be deleted */
-#define READ_CONTROL 0x00020000 /* The access control list and */
- /* ownership associated with the */
- /* file can be read */
-#define WRITE_DAC 0x00040000 /* The access control list and */
- /* ownership associated with the */
- /* file can be written. */
+ /* file or directory can be written */
+#define DELETE 0x00010000 /* The file or dir can be deleted */
+#define READ_CONTROL 0x00020000 /* The discretionary access control */
+ /* list and ownership associated */
+ /* with the file or dir can be read */
+#define WRITE_DAC 0x00040000 /* The discretionary access control */
+ /* list associated with the file or */
+ /* directory can be written */
#define WRITE_OWNER 0x00080000 /* Ownership information associated */
- /* with the file can be written */
+ /* with the file/dir can be written */
#define SYNCHRONIZE 0x00100000 /* The file handle can waited on to */
/* synchronize with the completion */
/* of an input/output request */
#define SYSTEM_SECURITY 0x01000000 /* The system access control list */
- /* can be read and changed */
-#define GENERIC_ALL 0x10000000
-#define GENERIC_EXECUTE 0x20000000
-#define GENERIC_WRITE 0x40000000
-#define GENERIC_READ 0x80000000
- /* In summary - Relevant file */
- /* access flags from CIFS are */
- /* file_read_data, file_write_data */
- /* file_execute, file_read_attributes*/
- /* write_dac, and delete. */
+ /* associated with the file or */
+ /* directory can be read or written */
+ /* (cannot be in DACL, can in SACL) */
+#define MAXIMUM_ALLOWED 0x02000000 /* Maximal subset of GENERIC_ALL */
+ /* permissions which can be granted */
+ /* (cannot be in DACL nor SACL) */
+#define GENERIC_ALL 0x10000000 /* Same as: GENERIC_EXECUTE | */
+ /* GENERIC_WRITE | */
+ /* GENERIC_READ | */
+ /* FILE_DELETE_CHILD | */
+ /* DELETE | */
+ /* WRITE_DAC | */
+ /* WRITE_OWNER */
+ /* So GENERIC_ALL contains all bits */
+ /* mentioned above except these two */
+ /* SYSTEM_SECURITY MAXIMUM_ALLOWED */
+#define GENERIC_EXECUTE 0x20000000 /* Same as: FILE_EXECUTE | */
+ /* FILE_READ_ATTRIBUTES | */
+ /* READ_CONTROL | */
+ /* SYNCHRONIZE */
+#define GENERIC_WRITE 0x40000000 /* Same as: FILE_WRITE_DATA | */
+ /* FILE_APPEND_DATA | */
+ /* FILE_WRITE_EA | */
+ /* FILE_WRITE_ATTRIBUTES | */
+ /* READ_CONTROL | */
+ /* SYNCHRONIZE */
+#define GENERIC_READ 0x80000000 /* Same as: FILE_READ_DATA | */
+ /* FILE_READ_EA | */
+ /* FILE_READ_ATTRIBUTES | */
+ /* READ_CONTROL | */
+ /* SYNCHRONIZE */
#define FILE_READ_RIGHTS (FILE_READ_DATA | FILE_READ_EA | FILE_READ_ATTRIBUTES)
#define FILE_WRITE_RIGHTS (FILE_WRITE_DATA | FILE_APPEND_DATA \
@@ -1484,20 +1524,6 @@ struct file_notify_information {
__u8 FileName[];
} __attribute__((packed));
-/* For IO_REPARSE_TAG_NFS */
-#define NFS_SPECFILE_LNK 0x00000000014B4E4C
-#define NFS_SPECFILE_CHR 0x0000000000524843
-#define NFS_SPECFILE_BLK 0x00000000004B4C42
-#define NFS_SPECFILE_FIFO 0x000000004F464946
-#define NFS_SPECFILE_SOCK 0x000000004B434F53
-struct reparse_posix_data {
- __le32 ReparseTag;
- __le16 ReparseDataLength;
- __u16 Reserved;
- __le64 InodeType; /* LNK, FIFO, CHR etc. */
- __u8 DataBuffer[];
-} __attribute__((packed));
-
struct cifs_quota_data {
__u32 rsrvd1; /* 0 */
__u32 sid_size;
@@ -2264,13 +2290,7 @@ typedef struct { /* data block encoding of response to level 263 QPathInfo */
__u8 DeletePending;
__u8 Directory;
__u16 Pad2;
- __le64 IndexNumber;
__le32 EASize;
- __le32 AccessFlags;
- __u64 IndexNumber1;
- __le64 CurrentByteOffset;
- __le32 Mode;
- __le32 AlignmentRequirement;
__le32 FileNameLength;
union {
char __pad;
diff --git a/fs/smb/client/cifsproto.h b/fs/smb/client/cifsproto.h
index 223e5e231f42..81680001944d 100644
--- a/fs/smb/client/cifsproto.h
+++ b/fs/smb/client/cifsproto.h
@@ -557,7 +557,7 @@ extern int CIFSSMBSetEA(const unsigned int xid, struct cifs_tcon *tcon,
const struct nls_table *nls_codepage,
struct cifs_sb_info *cifs_sb);
extern int CIFSSMBGetCIFSACL(const unsigned int xid, struct cifs_tcon *tcon,
- __u16 fid, struct smb_ntsd **acl_inf, __u32 *buflen);
+ __u16 fid, struct smb_ntsd **acl_inf, __u32 *buflen, __u32 info);
extern int CIFSSMBSetCIFSACL(const unsigned int, struct cifs_tcon *, __u16,
struct smb_ntsd *pntsd, __u32 len, int aclflag);
extern int cifs_do_get_acl(const unsigned int xid, struct cifs_tcon *tcon,
@@ -656,7 +656,7 @@ char *extract_sharename(const char *unc);
int parse_reparse_point(struct reparse_data_buffer *buf,
u32 plen, struct cifs_sb_info *cifs_sb,
const char *full_path,
- bool unicode, struct cifs_open_info_data *data);
+ struct cifs_open_info_data *data);
int __cifs_sfu_make_node(unsigned int xid, struct inode *inode,
struct dentry *dentry, struct cifs_tcon *tcon,
const char *full_path, umode_t mode, dev_t dev,
diff --git a/fs/smb/client/cifssmb.c b/fs/smb/client/cifssmb.c
index 7f1cacc89dbb..3feaa0f68169 100644
--- a/fs/smb/client/cifssmb.c
+++ b/fs/smb/client/cifssmb.c
@@ -3369,7 +3369,7 @@ validate_ntransact(char *buf, char **ppparm, char **ppdata,
/* Get Security Descriptor (by handle) from remote server for a file or dir */
int
CIFSSMBGetCIFSACL(const unsigned int xid, struct cifs_tcon *tcon, __u16 fid,
- struct smb_ntsd **acl_inf, __u32 *pbuflen)
+ struct smb_ntsd **acl_inf, __u32 *pbuflen, __u32 info)
{
int rc = 0;
int buf_type = 0;
@@ -3392,7 +3392,7 @@ CIFSSMBGetCIFSACL(const unsigned int xid, struct cifs_tcon *tcon, __u16 fid,
pSMB->MaxSetupCount = 0;
pSMB->Fid = fid; /* file handle always le */
pSMB->AclFlags = cpu_to_le32(CIFS_ACL_OWNER | CIFS_ACL_GROUP |
- CIFS_ACL_DACL);
+ CIFS_ACL_DACL | info);
pSMB->ByteCount = cpu_to_le16(11); /* 3 bytes pad + 8 bytes parm */
inc_rfc1001_len(pSMB, 11);
iov[0].iov_base = (char *)pSMB;
diff --git a/fs/smb/client/connect.c b/fs/smb/client/connect.c
index 880d7cf8b730..f917de020dd5 100644
--- a/fs/smb/client/connect.c
+++ b/fs/smb/client/connect.c
@@ -2849,6 +2849,10 @@ compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data)
return 0;
if (old->ctx->reparse_type != new->ctx->reparse_type)
return 0;
+ if (old->ctx->nonativesocket != new->ctx->nonativesocket)
+ return 0;
+ if (old->ctx->symlink_type != new->ctx->symlink_type)
+ return 0;
return 1;
}
diff --git a/fs/smb/client/fs_context.c b/fs/smb/client/fs_context.c
index 5381f05420bc..e9b286d9a7ba 100644
--- a/fs/smb/client/fs_context.c
+++ b/fs/smb/client/fs_context.c
@@ -133,6 +133,7 @@ const struct fs_parameter_spec smb3_fs_parameters[] = {
fsparam_flag("rootfs", Opt_rootfs),
fsparam_flag("compress", Opt_compress),
fsparam_flag("witness", Opt_witness),
+ fsparam_flag_no("nativesocket", Opt_nativesocket),
/* Mount options which take uid or gid */
fsparam_uid("backupuid", Opt_backupuid),
@@ -185,6 +186,8 @@ const struct fs_parameter_spec smb3_fs_parameters[] = {
fsparam_string("cache", Opt_cache),
fsparam_string("reparse", Opt_reparse),
fsparam_string("upcall_target", Opt_upcalltarget),
+ fsparam_string("symlink", Opt_symlink),
+ fsparam_string("symlinkroot", Opt_symlinkroot),
/* Arguments that should be ignored */
fsparam_flag("guest", Opt_ignore),
@@ -332,6 +335,7 @@ cifs_parse_cache_flavor(struct fs_context *fc, char *value, struct smb3_fs_conte
static const match_table_t reparse_flavor_tokens = {
{ Opt_reparse_default, "default" },
+ { Opt_reparse_none, "none" },
{ Opt_reparse_nfs, "nfs" },
{ Opt_reparse_wsl, "wsl" },
{ Opt_reparse_err, NULL },
@@ -346,6 +350,9 @@ static int parse_reparse_flavor(struct fs_context *fc, char *value,
case Opt_reparse_default:
ctx->reparse_type = CIFS_REPARSE_TYPE_DEFAULT;
break;
+ case Opt_reparse_none:
+ ctx->reparse_type = CIFS_REPARSE_TYPE_NONE;
+ break;
case Opt_reparse_nfs:
ctx->reparse_type = CIFS_REPARSE_TYPE_NFS;
break;
@@ -359,6 +366,55 @@ static int parse_reparse_flavor(struct fs_context *fc, char *value,
return 0;
}
+static const match_table_t symlink_flavor_tokens = {
+ { Opt_symlink_default, "default" },
+ { Opt_symlink_none, "none" },
+ { Opt_symlink_native, "native" },
+ { Opt_symlink_unix, "unix" },
+ { Opt_symlink_mfsymlinks, "mfsymlinks" },
+ { Opt_symlink_sfu, "sfu" },
+ { Opt_symlink_nfs, "nfs" },
+ { Opt_symlink_wsl, "wsl" },
+ { Opt_symlink_err, NULL },
+};
+
+static int parse_symlink_flavor(struct fs_context *fc, char *value,
+ struct smb3_fs_context *ctx)
+{
+ substring_t args[MAX_OPT_ARGS];
+
+ switch (match_token(value, symlink_flavor_tokens, args)) {
+ case Opt_symlink_default:
+ ctx->symlink_type = CIFS_SYMLINK_TYPE_DEFAULT;
+ break;
+ case Opt_symlink_none:
+ ctx->symlink_type = CIFS_SYMLINK_TYPE_NONE;
+ break;
+ case Opt_symlink_native:
+ ctx->symlink_type = CIFS_SYMLINK_TYPE_NATIVE;
+ break;
+ case Opt_symlink_unix:
+ ctx->symlink_type = CIFS_SYMLINK_TYPE_UNIX;
+ break;
+ case Opt_symlink_mfsymlinks:
+ ctx->symlink_type = CIFS_SYMLINK_TYPE_MFSYMLINKS;
+ break;
+ case Opt_symlink_sfu:
+ ctx->symlink_type = CIFS_SYMLINK_TYPE_SFU;
+ break;
+ case Opt_symlink_nfs:
+ ctx->symlink_type = CIFS_SYMLINK_TYPE_NFS;
+ break;
+ case Opt_symlink_wsl:
+ ctx->symlink_type = CIFS_SYMLINK_TYPE_WSL;
+ break;
+ default:
+ cifs_errorf(fc, "bad symlink= option: %s\n", value);
+ return 1;
+ }
+ return 0;
+}
+
#define DUP_CTX_STR(field) \
do { \
if (ctx->field) { \
@@ -386,6 +442,7 @@ smb3_fs_context_dup(struct smb3_fs_context *new_ctx, struct smb3_fs_context *ctx
new_ctx->iocharset = NULL;
new_ctx->leaf_fullpath = NULL;
new_ctx->dns_dom = NULL;
+ new_ctx->symlinkroot = NULL;
/*
* Make sure to stay in sync with smb3_cleanup_fs_context_contents()
*/
@@ -401,6 +458,7 @@ smb3_fs_context_dup(struct smb3_fs_context *new_ctx, struct smb3_fs_context *ctx
DUP_CTX_STR(iocharset);
DUP_CTX_STR(leaf_fullpath);
DUP_CTX_STR(dns_dom);
+ DUP_CTX_STR(symlinkroot);
return 0;
}
@@ -1727,6 +1785,23 @@ static int smb3_fs_context_parse_param(struct fs_context *fc,
if (parse_reparse_flavor(fc, param->string, ctx))
goto cifs_parse_mount_err;
break;
+ case Opt_nativesocket:
+ ctx->nonativesocket = result.negated;
+ break;
+ case Opt_symlink:
+ if (parse_symlink_flavor(fc, param->string, ctx))
+ goto cifs_parse_mount_err;
+ break;
+ case Opt_symlinkroot:
+ if (param->string[0] != '/') {
+ cifs_errorf(fc, "symlinkroot mount options must be absolute path\n");
+ goto cifs_parse_mount_err;
+ }
+ kfree(ctx->symlinkroot);
+ ctx->symlinkroot = kstrdup(param->string, GFP_KERNEL);
+ if (!ctx->symlinkroot)
+ goto cifs_parse_mount_err;
+ break;
}
/* case Opt_ignore: - is ignored as expected ... */
@@ -1735,6 +1810,13 @@ static int smb3_fs_context_parse_param(struct fs_context *fc,
goto cifs_parse_mount_err;
}
+ /*
+ * By default resolve all native absolute symlinks relative to "/mnt/".
+ * Same default has drvfs driver running in WSL for resolving SMB shares.
+ */
+ if (!ctx->symlinkroot)
+ ctx->symlinkroot = kstrdup("/mnt/", GFP_KERNEL);
+
return 0;
cifs_parse_mount_err:
@@ -1745,6 +1827,24 @@ static int smb3_fs_context_parse_param(struct fs_context *fc,
return -EINVAL;
}
+enum cifs_symlink_type get_cifs_symlink_type(struct cifs_sb_info *cifs_sb)
+{
+ if (cifs_sb->ctx->symlink_type == CIFS_SYMLINK_TYPE_DEFAULT) {
+ if (cifs_sb->ctx->mfsymlinks)
+ return CIFS_SYMLINK_TYPE_MFSYMLINKS;
+ else if (cifs_sb->ctx->sfu_emul)
+ return CIFS_SYMLINK_TYPE_SFU;
+ else if (cifs_sb->ctx->linux_ext && !cifs_sb->ctx->no_linux_ext)
+ return CIFS_SYMLINK_TYPE_UNIX;
+ else if (cifs_sb->ctx->reparse_type != CIFS_REPARSE_TYPE_NONE)
+ return CIFS_SYMLINK_TYPE_NATIVE;
+ else
+ return CIFS_SYMLINK_TYPE_NONE;
+ } else {
+ return cifs_sb->ctx->symlink_type;
+ }
+}
+
int smb3_init_fs_context(struct fs_context *fc)
{
struct smb3_fs_context *ctx;
@@ -1821,6 +1921,8 @@ int smb3_init_fs_context(struct fs_context *fc)
ctx->retrans = 1;
ctx->reparse_type = CIFS_REPARSE_TYPE_DEFAULT;
+ ctx->symlink_type = CIFS_SYMLINK_TYPE_DEFAULT;
+ ctx->nonativesocket = 0;
/*
* short int override_uid = -1;
@@ -1867,6 +1969,8 @@ smb3_cleanup_fs_context_contents(struct smb3_fs_context *ctx)
ctx->leaf_fullpath = NULL;
kfree(ctx->dns_dom);
ctx->dns_dom = NULL;
+ kfree(ctx->symlinkroot);
+ ctx->symlinkroot = NULL;
}
void
diff --git a/fs/smb/client/fs_context.h b/fs/smb/client/fs_context.h
index 8813533345ee..881bfc08667e 100644
--- a/fs/smb/client/fs_context.h
+++ b/fs/smb/client/fs_context.h
@@ -43,11 +43,24 @@ enum {
enum cifs_reparse_parm {
Opt_reparse_default,
+ Opt_reparse_none,
Opt_reparse_nfs,
Opt_reparse_wsl,
Opt_reparse_err
};
+enum cifs_symlink_parm {
+ Opt_symlink_default,
+ Opt_symlink_none,
+ Opt_symlink_native,
+ Opt_symlink_unix,
+ Opt_symlink_mfsymlinks,
+ Opt_symlink_sfu,
+ Opt_symlink_nfs,
+ Opt_symlink_wsl,
+ Opt_symlink_err
+};
+
enum cifs_sec_param {
Opt_sec_krb5,
Opt_sec_krb5i,
@@ -166,6 +179,9 @@ enum cifs_param {
Opt_cache,
Opt_reparse,
Opt_upcalltarget,
+ Opt_nativesocket,
+ Opt_symlink,
+ Opt_symlinkroot,
/* Mount options to be ignored */
Opt_ignore,
@@ -294,12 +310,17 @@ struct smb3_fs_context {
struct cifs_ses *dfs_root_ses;
bool dfs_automount:1; /* set for dfs automount only */
enum cifs_reparse_type reparse_type;
+ enum cifs_symlink_type symlink_type;
+ bool nonativesocket:1;
bool dfs_conn:1; /* set for dfs mounts */
char *dns_dom;
+ char *symlinkroot; /* top level directory for native SMB symlinks in absolute format */
};
extern const struct fs_parameter_spec smb3_fs_parameters[];
+extern enum cifs_symlink_type get_cifs_symlink_type(struct cifs_sb_info *cifs_sb);
+
extern int smb3_init_fs_context(struct fs_context *fc);
extern void smb3_cleanup_fs_context_contents(struct smb3_fs_context *ctx);
extern void smb3_cleanup_fs_context(struct smb3_fs_context *ctx);
diff --git a/fs/smb/client/inode.c b/fs/smb/client/inode.c
index 93e9188b2632..9cc31cf6ebd0 100644
--- a/fs/smb/client/inode.c
+++ b/fs/smb/client/inode.c
@@ -990,7 +990,7 @@ cifs_get_file_info(struct file *filp)
/* TODO: add support to query reparse tag */
data.adjust_tz = false;
if (data.symlink_target) {
- data.symlink = true;
+ data.reparse_point = true;
data.reparse.tag = IO_REPARSE_TAG_SYMLINK;
}
path = build_path_from_dentry(dentry, page);
@@ -1216,6 +1216,11 @@ static int reparse_info_to_fattr(struct cifs_open_info_data *data,
full_path,
iov, data);
}
+
+ if (data->reparse.tag == IO_REPARSE_TAG_SYMLINK && !rc) {
+ bool directory = le32_to_cpu(data->fi.Attributes) & ATTR_DIRECTORY;
+ rc = smb2_fix_symlink_target_type(&data->symlink_target, directory, cifs_sb);
+ }
break;
}
diff --git a/fs/smb/client/link.c b/fs/smb/client/link.c
index 47ddeb7fa111..6e6c09cc5ce7 100644
--- a/fs/smb/client/link.c
+++ b/fs/smb/client/link.c
@@ -18,6 +18,7 @@
#include "cifs_unicode.h"
#include "smb2proto.h"
#include "cifs_ioctl.h"
+#include "fs_context.h"
/*
* M-F Symlink Functions - Begin
@@ -604,22 +605,53 @@ cifs_symlink(struct mnt_idmap *idmap, struct inode *inode,
cifs_dbg(FYI, "symname is %s\n", symname);
/* BB what if DFS and this volume is on different share? BB */
- if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
- rc = create_mf_symlink(xid, pTcon, cifs_sb, full_path, symname);
- } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
- rc = __cifs_sfu_make_node(xid, inode, direntry, pTcon,
- full_path, S_IFLNK, 0, symname);
+ rc = -EOPNOTSUPP;
+ switch (get_cifs_symlink_type(cifs_sb)) {
+ case CIFS_SYMLINK_TYPE_DEFAULT:
+ /* should not happen, get_cifs_symlink_type() resolves the default */
+ break;
+
+ case CIFS_SYMLINK_TYPE_NONE:
+ break;
+
+ case CIFS_SYMLINK_TYPE_UNIX:
#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
- } else if (pTcon->unix_ext) {
- rc = CIFSUnixCreateSymLink(xid, pTcon, full_path, symname,
- cifs_sb->local_nls,
- cifs_remap(cifs_sb));
+ if (pTcon->unix_ext) {
+ rc = CIFSUnixCreateSymLink(xid, pTcon, full_path,
+ symname,
+ cifs_sb->local_nls,
+ cifs_remap(cifs_sb));
+ }
#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
- } else if (server->ops->create_reparse_symlink) {
- rc = server->ops->create_reparse_symlink(xid, inode, direntry,
- pTcon, full_path,
- symname);
- goto symlink_exit;
+ break;
+
+ case CIFS_SYMLINK_TYPE_MFSYMLINKS:
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) {
+ rc = create_mf_symlink(xid, pTcon, cifs_sb,
+ full_path, symname);
+ }
+ break;
+
+ case CIFS_SYMLINK_TYPE_SFU:
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
+ rc = __cifs_sfu_make_node(xid, inode, direntry, pTcon,
+ full_path, S_IFLNK,
+ 0, symname);
+ }
+ break;
+
+ case CIFS_SYMLINK_TYPE_NATIVE:
+ case CIFS_SYMLINK_TYPE_NFS:
+ case CIFS_SYMLINK_TYPE_WSL:
+ if (server->ops->create_reparse_symlink) {
+ rc = server->ops->create_reparse_symlink(xid, inode,
+ direntry,
+ pTcon,
+ full_path,
+ symname);
+ goto symlink_exit;
+ }
+ break;
}
if (rc == 0) {
diff --git a/fs/smb/client/netmisc.c b/fs/smb/client/netmisc.c
index 17b3e21ea868..9ec20601cee2 100644
--- a/fs/smb/client/netmisc.c
+++ b/fs/smb/client/netmisc.c
@@ -313,7 +313,6 @@ static const struct {
ERRDOS, 2215, NT_STATUS_NO_LOGON_SERVERS}, {
ERRHRD, ERRgeneral, NT_STATUS_NO_SUCH_LOGON_SESSION}, {
ERRHRD, ERRgeneral, NT_STATUS_NO_SUCH_PRIVILEGE}, {
- ERRDOS, ERRnoaccess, NT_STATUS_PRIVILEGE_NOT_HELD}, {
ERRHRD, ERRgeneral, NT_STATUS_INVALID_ACCOUNT_NAME}, {
ERRHRD, ERRgeneral, NT_STATUS_USER_EXISTS},
/* { This NT error code was 'sqashed'
@@ -871,6 +870,15 @@ map_smb_to_linux_error(char *buf, bool logErr)
}
/* else ERRHRD class errors or junk - return EIO */
+ /* special cases for NT status codes which cannot be translated to DOS codes */
+ if (smb->Flags2 & SMBFLG2_ERR_STATUS) {
+ __u32 err = le32_to_cpu(smb->Status.CifsError);
+ if (err == (NT_STATUS_NOT_A_REPARSE_POINT))
+ rc = -ENODATA;
+ else if (err == (NT_STATUS_PRIVILEGE_NOT_HELD))
+ rc = -EPERM;
+ }
+
cifs_dbg(FYI, "Mapping smb error code 0x%x to POSIX err %d\n",
le32_to_cpu(smb->Status.CifsError), rc);
diff --git a/fs/smb/client/nterr.c b/fs/smb/client/nterr.c
index d396a8e98a81..8f0bc441295e 100644
--- a/fs/smb/client/nterr.c
+++ b/fs/smb/client/nterr.c
@@ -674,6 +674,7 @@ const struct nt_err_code_struct nt_errs[] = {
{"NT_STATUS_QUOTA_LIST_INCONSISTENT",
NT_STATUS_QUOTA_LIST_INCONSISTENT},
{"NT_STATUS_FILE_IS_OFFLINE", NT_STATUS_FILE_IS_OFFLINE},
+ {"NT_STATUS_NOT_A_REPARSE_POINT", NT_STATUS_NOT_A_REPARSE_POINT},
{"NT_STATUS_NO_MORE_ENTRIES", NT_STATUS_NO_MORE_ENTRIES},
{"NT_STATUS_MORE_ENTRIES", NT_STATUS_MORE_ENTRIES},
{"NT_STATUS_SOME_UNMAPPED", NT_STATUS_SOME_UNMAPPED},
diff --git a/fs/smb/client/nterr.h b/fs/smb/client/nterr.h
index edd4741cab0a..180602c22355 100644
--- a/fs/smb/client/nterr.h
+++ b/fs/smb/client/nterr.h
@@ -546,6 +546,7 @@ extern const struct nt_err_code_struct nt_errs[];
#define NT_STATUS_TOO_MANY_LINKS 0xC0000000 | 0x0265
#define NT_STATUS_QUOTA_LIST_INCONSISTENT 0xC0000000 | 0x0266
#define NT_STATUS_FILE_IS_OFFLINE 0xC0000000 | 0x0267
+#define NT_STATUS_NOT_A_REPARSE_POINT 0xC0000000 | 0x0275
#define NT_STATUS_NO_SUCH_JOB 0xC0000000 | 0xEDE /* scheduler */
#endif /* _NTERR_H */
diff --git a/fs/smb/client/reparse.c b/fs/smb/client/reparse.c
index d88b41133e00..0a5a52a8a7dd 100644
--- a/fs/smb/client/reparse.c
+++ b/fs/smb/client/reparse.c
@@ -14,6 +14,20 @@
#include "fs_context.h"
#include "reparse.h"
+static int mknod_nfs(unsigned int xid, struct inode *inode,
+ struct dentry *dentry, struct cifs_tcon *tcon,
+ const char *full_path, umode_t mode, dev_t dev,
+ const char *symname);
+
+static int mknod_wsl(unsigned int xid, struct inode *inode,
+ struct dentry *dentry, struct cifs_tcon *tcon,
+ const char *full_path, umode_t mode, dev_t dev,
+ const char *symname);
+
+static int create_native_symlink(const unsigned int xid, struct inode *inode,
+ struct dentry *dentry, struct cifs_tcon *tcon,
+ const char *full_path, const char *symname);
+
static int detect_directory_symlink_target(struct cifs_sb_info *cifs_sb,
const unsigned int xid,
const char *full_path,
@@ -24,37 +38,148 @@ int smb2_create_reparse_symlink(const unsigned int xid, struct inode *inode,
struct dentry *dentry, struct cifs_tcon *tcon,
const char *full_path, const char *symname)
{
+ switch (get_cifs_symlink_type(CIFS_SB(inode->i_sb))) {
+ case CIFS_SYMLINK_TYPE_NATIVE:
+ return create_native_symlink(xid, inode, dentry, tcon, full_path, symname);
+ case CIFS_SYMLINK_TYPE_NFS:
+ return mknod_nfs(xid, inode, dentry, tcon, full_path, S_IFLNK, 0, symname);
+ case CIFS_SYMLINK_TYPE_WSL:
+ return mknod_wsl(xid, inode, dentry, tcon, full_path, S_IFLNK, 0, symname);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int create_native_symlink(const unsigned int xid, struct inode *inode,
+ struct dentry *dentry, struct cifs_tcon *tcon,
+ const char *full_path, const char *symname)
+{
struct reparse_symlink_data_buffer *buf = NULL;
- struct cifs_open_info_data data;
+ struct cifs_open_info_data data = {};
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
struct inode *new;
struct kvec iov;
- __le16 *path;
+ __le16 *path = NULL;
bool directory;
- char *sym, sep = CIFS_DIR_SEP(cifs_sb);
- u16 len, plen;
+ char *symlink_target = NULL;
+ char *sym = NULL;
+ char sep = CIFS_DIR_SEP(cifs_sb);
+ u16 len, plen, poff, slen;
int rc = 0;
if (strlen(symname) > REPARSE_SYM_PATH_MAX)
return -ENAMETOOLONG;
- sym = kstrdup(symname, GFP_KERNEL);
- if (!sym)
- return -ENOMEM;
+ symlink_target = kstrdup(symname, GFP_KERNEL);
+ if (!symlink_target) {
+ rc = -ENOMEM;
+ goto out;
+ }
data = (struct cifs_open_info_data) {
.reparse_point = true,
.reparse = { .tag = IO_REPARSE_TAG_SYMLINK, },
- .symlink_target = sym,
+ .symlink_target = symlink_target,
};
- convert_delimiter(sym, sep);
+ if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) && symname[0] == '/') {
+ /*
+ * This is a request to create an absolute symlink on the server
+ * which does not support POSIX paths, and expects symlink in
+ * NT-style path. So convert absolute Linux symlink target path
+ * to the absolute NT-style path. Root of the NT-style path for
+ * symlinks is specified in "symlinkroot" mount option. This will
+ * ensure compatibility of this symlink stored in absolute form
+ * on the SMB server.
+ */
+ if (!strstarts(symname, cifs_sb->ctx->symlinkroot)) {
+ /*
+ * If the absolute Linux symlink target path is not
+ * inside "symlinkroot" location then there is no way
+ * to convert such Linux symlink to NT-style path.
+ */
+ cifs_dbg(VFS,
+ "absolute symlink '%s' cannot be converted to NT format "
+ "because it is outside of symlinkroot='%s'\n",
+ symname, cifs_sb->ctx->symlinkroot);
+ rc = -EINVAL;
+ goto out;
+ }
+ len = strlen(cifs_sb->ctx->symlinkroot);
+ if (cifs_sb->ctx->symlinkroot[len-1] != '/')
+ len++;
+ if (symname[len] >= 'a' && symname[len] <= 'z' &&
+ (symname[len+1] == '/' || symname[len+1] == '\0')) {
+ /*
+ * Symlink points to Linux target /symlinkroot/x/path/...
+ * where 'x' is the lowercase local Windows drive.
+ * NT-style path for 'x' has common form \??\X:\path\...
+ * with uppercase local Windows drive.
+ */
+ int common_path_len = strlen(symname+len+1)+1;
+ sym = kzalloc(6+common_path_len, GFP_KERNEL);
+ if (!sym) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ memcpy(sym, "\\??\\", 4);
+ sym[4] = symname[len] - ('a'-'A');
+ sym[5] = ':';
+ memcpy(sym+6, symname+len+1, common_path_len);
+ } else {
+ /* Unhandled absolute symlink. Report an error. */
+ cifs_dbg(
+ VFS,
+ "absolute symlink '%s' cannot be converted to NT format "
+ "because it points to unknown target\n",
+ symname);
+ rc = -EINVAL;
+ goto out;
+ }
+ } else {
+ /*
+ * This is request to either create an absolute symlink on
+ * server which expects POSIX paths or it is an request to
+ * create a relative symlink from the current directory.
+ * These paths have same format as relative SMB symlinks,
+ * so no conversion is needed. So just take symname as-is.
+ */
+ sym = kstrdup(symname, GFP_KERNEL);
+ if (!sym) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ }
+
+ if (sep == '\\')
+ convert_delimiter(sym, sep);
+
+ /*
+ * For absolute NT symlinks it is required to pass also leading
+ * backslash and to not mangle NT object prefix "\\??\\" and not to
+ * mangle colon in drive letter. But cifs_convert_path_to_utf16()
+ * removes leading backslash and replaces '?' and ':'. So temporary
+ * mask these characters in NT object prefix by '_' and then change
+ * them back.
+ */
+ if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) && symname[0] == '/')
+ sym[0] = sym[1] = sym[2] = sym[5] = '_';
+
path = cifs_convert_path_to_utf16(sym, cifs_sb);
if (!path) {
rc = -ENOMEM;
goto out;
}
+ if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) && symname[0] == '/') {
+ sym[0] = '\\';
+ sym[1] = sym[2] = '?';
+ sym[5] = ':';
+ path[0] = cpu_to_le16('\\');
+ path[1] = path[2] = cpu_to_le16('?');
+ path[5] = cpu_to_le16(':');
+ }
+
/*
* SMB distinguish between symlink to directory and symlink to file.
* They cannot be exchanged (symlink of file type which points to
@@ -67,8 +192,18 @@ int smb2_create_reparse_symlink(const unsigned int xid, struct inode *inode,
if (rc < 0)
goto out;
- plen = 2 * UniStrnlen((wchar_t *)path, REPARSE_SYM_PATH_MAX);
- len = sizeof(*buf) + plen * 2;
+ slen = 2 * UniStrnlen((wchar_t *)path, REPARSE_SYM_PATH_MAX);
+ poff = 0;
+ plen = slen;
+ if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) && symname[0] == '/') {
+ /*
+ * For absolute NT symlinks skip leading "\\??\\" in PrintName as
+ * PrintName is user visible location in DOS/Win32 format (not in NT format).
+ */
+ poff = 4;
+ plen -= 2 * poff;
+ }
+ len = sizeof(*buf) + plen + slen;
buf = kzalloc(len, GFP_KERNEL);
if (!buf) {
rc = -ENOMEM;
@@ -77,17 +212,17 @@ int smb2_create_reparse_symlink(const unsigned int xid, struct inode *inode,
buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_SYMLINK);
buf->ReparseDataLength = cpu_to_le16(len - sizeof(struct reparse_data_buffer));
+
buf->SubstituteNameOffset = cpu_to_le16(plen);
- buf->SubstituteNameLength = cpu_to_le16(plen);
- memcpy(&buf->PathBuffer[plen], path, plen);
+ buf->SubstituteNameLength = cpu_to_le16(slen);
+ memcpy(&buf->PathBuffer[plen], path, slen);
+
buf->PrintNameOffset = 0;
buf->PrintNameLength = cpu_to_le16(plen);
- memcpy(buf->PathBuffer, path, plen);
+ memcpy(buf->PathBuffer, path+poff, plen);
+
buf->Flags = cpu_to_le32(*symname != '/' ? SYMLINK_FLAG_RELATIVE : 0);
- if (*sym != sep)
- buf->Flags = cpu_to_le32(SYMLINK_FLAG_RELATIVE);
- convert_delimiter(sym, '/');
iov.iov_base = buf;
iov.iov_len = len;
new = smb2_get_reparse_inode(&data, inode->i_sb, xid,
@@ -98,6 +233,7 @@ int smb2_create_reparse_symlink(const unsigned int xid, struct inode *inode,
else
rc = PTR_ERR(new);
out:
+ kfree(sym);
kfree(path);
cifs_free_open_info(&data);
kfree(buf);
@@ -242,8 +378,39 @@ static int detect_directory_symlink_target(struct cifs_sb_info *cifs_sb,
return 0;
}
-static int nfs_set_reparse_buf(struct reparse_posix_data *buf,
+static int create_native_socket(const unsigned int xid, struct inode *inode,
+ struct dentry *dentry, struct cifs_tcon *tcon,
+ const char *full_path)
+{
+ struct reparse_data_buffer buf = {
+ .ReparseTag = cpu_to_le32(IO_REPARSE_TAG_AF_UNIX),
+ .ReparseDataLength = cpu_to_le16(0),
+ };
+ struct cifs_open_info_data data = {
+ .reparse_point = true,
+ .reparse = { .tag = IO_REPARSE_TAG_AF_UNIX, .buf = &buf, },
+ };
+ struct kvec iov = {
+ .iov_base = &buf,
+ .iov_len = sizeof(buf),
+ };
+ struct inode *new;
+ int rc = 0;
+
+ new = smb2_get_reparse_inode(&data, inode->i_sb, xid,
+ tcon, full_path, false, &iov, NULL);
+ if (!IS_ERR(new))
+ d_instantiate(dentry, new);
+ else
+ rc = PTR_ERR(new);
+ cifs_free_open_info(&data);
+ return rc;
+}
+
+static int nfs_set_reparse_buf(struct reparse_nfs_data_buffer *buf,
mode_t mode, dev_t dev,
+ __le16 *symname_utf16,
+ int symname_utf16_len,
struct kvec *iov)
{
u64 type;
@@ -254,7 +421,13 @@ static int nfs_set_reparse_buf(struct reparse_posix_data *buf,
switch ((type = reparse_mode_nfs_type(mode))) {
case NFS_SPECFILE_BLK:
case NFS_SPECFILE_CHR:
- dlen = sizeof(__le64);
+ dlen = 2 * sizeof(__le32);
+ ((__le32 *)buf->DataBuffer)[0] = cpu_to_le32(MAJOR(dev));
+ ((__le32 *)buf->DataBuffer)[1] = cpu_to_le32(MINOR(dev));
+ break;
+ case NFS_SPECFILE_LNK:
+ dlen = symname_utf16_len;
+ memcpy(buf->DataBuffer, symname_utf16, symname_utf16_len);
break;
case NFS_SPECFILE_FIFO:
case NFS_SPECFILE_SOCK:
@@ -269,8 +442,6 @@ static int nfs_set_reparse_buf(struct reparse_posix_data *buf,
buf->InodeType = cpu_to_le64(type);
buf->ReparseDataLength = cpu_to_le16(len + dlen -
sizeof(struct reparse_data_buffer));
- *(__le64 *)buf->DataBuffer = cpu_to_le64(((u64)MINOR(dev) << 32) |
- MAJOR(dev));
iov->iov_base = buf;
iov->iov_len = len + dlen;
return 0;
@@ -278,23 +449,45 @@ static int nfs_set_reparse_buf(struct reparse_posix_data *buf,
static int mknod_nfs(unsigned int xid, struct inode *inode,
struct dentry *dentry, struct cifs_tcon *tcon,
- const char *full_path, umode_t mode, dev_t dev)
+ const char *full_path, umode_t mode, dev_t dev,
+ const char *symname)
{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
struct cifs_open_info_data data;
- struct reparse_posix_data *p;
+ struct reparse_nfs_data_buffer *p = NULL;
+ __le16 *symname_utf16 = NULL;
+ int symname_utf16_len = 0;
struct inode *new;
struct kvec iov;
__u8 buf[sizeof(*p) + sizeof(__le64)];
int rc;
- p = (struct reparse_posix_data *)buf;
- rc = nfs_set_reparse_buf(p, mode, dev, &iov);
+ if (S_ISLNK(mode)) {
+ symname_utf16 = cifs_strndup_to_utf16(symname, strlen(symname),
+ &symname_utf16_len,
+ cifs_sb->local_nls,
+ NO_MAP_UNI_RSVD);
+ if (!symname_utf16) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ symname_utf16_len -= 2; /* symlink is without trailing wide-nul */
+ p = kzalloc(sizeof(*p) + symname_utf16_len, GFP_KERNEL);
+ if (!p) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ } else {
+ p = (struct reparse_nfs_data_buffer *)buf;
+ }
+ rc = nfs_set_reparse_buf(p, mode, dev, symname_utf16, symname_utf16_len, &iov);
if (rc)
- return rc;
+ goto out;
data = (struct cifs_open_info_data) {
.reparse_point = true,
- .reparse = { .tag = IO_REPARSE_TAG_NFS, .posix = p, },
+ .reparse = { .tag = IO_REPARSE_TAG_NFS, .buf = (struct reparse_data_buffer *)p, },
+ .symlink_target = kstrdup(symname, GFP_KERNEL),
};
new = smb2_get_reparse_inode(&data, inode->i_sb, xid,
@@ -304,12 +497,25 @@ static int mknod_nfs(unsigned int xid, struct inode *inode,
else
rc = PTR_ERR(new);
cifs_free_open_info(&data);
+out:
+ if (S_ISLNK(mode)) {
+ kfree(symname_utf16);
+ kfree(p);
+ }
return rc;
}
-static int wsl_set_reparse_buf(struct reparse_data_buffer *buf,
- mode_t mode, struct kvec *iov)
+static int wsl_set_reparse_buf(struct reparse_data_buffer **buf,
+ mode_t mode, const char *symname,
+ struct cifs_sb_info *cifs_sb,
+ struct kvec *iov)
{
+ struct reparse_wsl_symlink_data_buffer *symlink_buf;
+ __le16 *symname_utf16;
+ int symname_utf16_len;
+ int symname_utf8_maxlen;
+ int symname_utf8_len;
+ size_t buf_len;
u32 tag;
switch ((tag = reparse_mode_wsl_tag(mode))) {
@@ -317,16 +523,45 @@ static int wsl_set_reparse_buf(struct reparse_data_buffer *buf,
case IO_REPARSE_TAG_LX_CHR:
case IO_REPARSE_TAG_LX_FIFO:
case IO_REPARSE_TAG_AF_UNIX:
+ buf_len = sizeof(struct reparse_data_buffer);
+ *buf = kzalloc(buf_len, GFP_KERNEL);
+ if (!*buf)
+ return -ENOMEM;
+ break;
+ case IO_REPARSE_TAG_LX_SYMLINK:
+ symname_utf16 = cifs_strndup_to_utf16(symname, strlen(symname),
+ &symname_utf16_len,
+ cifs_sb->local_nls,
+ NO_MAP_UNI_RSVD);
+ if (!symname_utf16)
+ return -ENOMEM;
+ symname_utf8_maxlen = symname_utf16_len/2*3;
+ symlink_buf = kzalloc(sizeof(struct reparse_wsl_symlink_data_buffer) +
+ symname_utf8_maxlen, GFP_KERNEL);
+ if (!symlink_buf) {
+ kfree(symname_utf16);
+ return -ENOMEM;
+ }
+ /* Flag 0x02000000 is unknown, but all wsl symlinks have this value */
+ symlink_buf->Flags = cpu_to_le32(0x02000000);
+ /* PathBuffer is in UTF-8 but without trailing null-term byte */
+ symname_utf8_len = utf16s_to_utf8s((wchar_t *)symname_utf16, symname_utf16_len/2,
+ UTF16_LITTLE_ENDIAN,
+ symlink_buf->PathBuffer,
+ symname_utf8_maxlen);
+ *buf = (struct reparse_data_buffer *)symlink_buf;
+ buf_len = sizeof(struct reparse_wsl_symlink_data_buffer) + symname_utf8_len;
+ kfree(symname_utf16);
break;
default:
return -EOPNOTSUPP;
}
- buf->ReparseTag = cpu_to_le32(tag);
- buf->Reserved = 0;
- buf->ReparseDataLength = 0;
- iov->iov_base = buf;
- iov->iov_len = sizeof(*buf);
+ (*buf)->ReparseTag = cpu_to_le32(tag);
+ (*buf)->Reserved = 0;
+ (*buf)->ReparseDataLength = cpu_to_le16(buf_len - sizeof(struct reparse_data_buffer));
+ iov->iov_base = *buf;
+ iov->iov_len = buf_len;
return 0;
}
@@ -415,27 +650,32 @@ static int wsl_set_xattrs(struct inode *inode, umode_t _mode,
static int mknod_wsl(unsigned int xid, struct inode *inode,
struct dentry *dentry, struct cifs_tcon *tcon,
- const char *full_path, umode_t mode, dev_t dev)
+ const char *full_path, umode_t mode, dev_t dev,
+ const char *symname)
{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
struct cifs_open_info_data data;
- struct reparse_data_buffer buf;
+ struct reparse_data_buffer *buf;
struct smb2_create_ea_ctx *cc;
struct inode *new;
unsigned int len;
struct kvec reparse_iov, xattr_iov;
int rc;
- rc = wsl_set_reparse_buf(&buf, mode, &reparse_iov);
+ rc = wsl_set_reparse_buf(&buf, mode, symname, cifs_sb, &reparse_iov);
if (rc)
return rc;
rc = wsl_set_xattrs(inode, mode, dev, &xattr_iov);
- if (rc)
+ if (rc) {
+ kfree(buf);
return rc;
+ }
data = (struct cifs_open_info_data) {
.reparse_point = true,
- .reparse = { .tag = le32_to_cpu(buf.ReparseTag), .buf = &buf, },
+ .reparse = { .tag = le32_to_cpu(buf->ReparseTag), .buf = buf, },
+ .symlink_target = kstrdup(symname, GFP_KERNEL),
};
cc = xattr_iov.iov_base;
@@ -452,6 +692,7 @@ static int mknod_wsl(unsigned int xid, struct inode *inode,
rc = PTR_ERR(new);
cifs_free_open_info(&data);
kfree(xattr_iov.iov_base);
+ kfree(buf);
return rc;
}
@@ -460,21 +701,22 @@ int smb2_mknod_reparse(unsigned int xid, struct inode *inode,
const char *full_path, umode_t mode, dev_t dev)
{
struct smb3_fs_context *ctx = CIFS_SB(inode->i_sb)->ctx;
- int rc = -EOPNOTSUPP;
+
+ if (S_ISSOCK(mode) && !ctx->nonativesocket && ctx->reparse_type != CIFS_REPARSE_TYPE_NONE)
+ return create_native_socket(xid, inode, dentry, tcon, full_path);
switch (ctx->reparse_type) {
case CIFS_REPARSE_TYPE_NFS:
- rc = mknod_nfs(xid, inode, dentry, tcon, full_path, mode, dev);
- break;
+ return mknod_nfs(xid, inode, dentry, tcon, full_path, mode, dev, NULL);
case CIFS_REPARSE_TYPE_WSL:
- rc = mknod_wsl(xid, inode, dentry, tcon, full_path, mode, dev);
- break;
+ return mknod_wsl(xid, inode, dentry, tcon, full_path, mode, dev, NULL);
+ default:
+ return -EOPNOTSUPP;
}
- return rc;
}
/* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
-static int parse_reparse_posix(struct reparse_posix_data *buf,
+static int parse_reparse_nfs(struct reparse_nfs_data_buffer *buf,
struct cifs_sb_info *cifs_sb,
struct cifs_open_info_data *data)
{
@@ -536,43 +778,160 @@ static int parse_reparse_posix(struct reparse_posix_data *buf,
}
int smb2_parse_native_symlink(char **target, const char *buf, unsigned int len,
- bool unicode, bool relative,
+ bool relative,
const char *full_path,
struct cifs_sb_info *cifs_sb)
{
char sep = CIFS_DIR_SEP(cifs_sb);
char *linux_target = NULL;
char *smb_target = NULL;
+ int symlinkroot_len;
+ int abs_path_len;
+ char *abs_path;
int levels;
int rc;
int i;
- /* Check that length it valid for unicode/non-unicode mode */
- if (!len || (unicode && (len % 2))) {
+ /* Check that length it valid */
+ if (!len || (len % 2)) {
cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
rc = -EIO;
goto out;
}
/*
- * Check that buffer does not contain UTF-16 null codepoint in unicode
- * mode or null byte in non-unicode mode because Linux cannot process
- * symlink with null byte.
+ * Check that buffer does not contain UTF-16 null codepoint
+ * because Linux cannot process symlink with null byte.
*/
- if ((unicode && UniStrnlen((wchar_t *)buf, len/2) != len/2) ||
- (!unicode && strnlen(buf, len) != len)) {
+ if (UniStrnlen((wchar_t *)buf, len/2) != len/2) {
cifs_dbg(VFS, "srv returned null byte in native symlink target location\n");
rc = -EIO;
goto out;
}
- smb_target = cifs_strndup_from_utf16(buf, len, unicode, cifs_sb->local_nls);
+ smb_target = cifs_strndup_from_utf16(buf, len, true, cifs_sb->local_nls);
if (!smb_target) {
rc = -ENOMEM;
goto out;
}
- if (smb_target[0] == sep && relative) {
+ if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) && !relative) {
+ /*
+ * This is an absolute symlink from the server which does not
+ * support POSIX paths, so the symlink is in NT-style path.
+ * So convert it to absolute Linux symlink target path. Root of
+ * the NT-style path for symlinks is specified in "symlinkroot"
+ * mount option.
+ *
+ * Root of the DOS and Win32 paths is at NT path \??\
+ * It means that DOS/Win32 path C:\folder\file.txt is
+ * NT path \??\C:\folder\file.txt
+ *
+ * NT systems have some well-known object symlinks in their NT
+ * hierarchy, which is needed to take into account when resolving
+ * other symlinks. Most commonly used symlink paths are:
+ * \?? -> \GLOBAL??
+ * \DosDevices -> \??
+ * \GLOBAL??\GLOBALROOT -> \
+ * \GLOBAL??\Global -> \GLOBAL??
+ * \GLOBAL??\NUL -> \Device\Null
+ * \GLOBAL??\UNC -> \Device\Mup
+ * \GLOBAL??\PhysicalDrive0 -> \Device\Harddisk0\DR0 (for each harddisk)
+ * \GLOBAL??\A: -> \Device\Floppy0 (if A: is the first floppy)
+ * \GLOBAL??\C: -> \Device\HarddiskVolume1 (if C: is the first harddisk)
+ * \GLOBAL??\D: -> \Device\CdRom0 (if D: is first cdrom)
+ * \SystemRoot -> \Device\Harddisk0\Partition1\WINDOWS (or where is NT system installed)
+ * \Volume{...} -> \Device\HarddiskVolume1 (where ... is system generated guid)
+ *
+ * In most common cases, absolute NT symlinks points to path on
+ * DOS/Win32 drive letter, system-specific Volume or on UNC share.
+ * Here are few examples of commonly used absolute NT symlinks
+ * created by mklink.exe tool:
+ * \??\C:\folder\file.txt
+ * \??\\C:\folder\file.txt
+ * \??\UNC\server\share\file.txt
+ * \??\\UNC\server\share\file.txt
+ * \??\Volume{b75e2c83-0000-0000-0000-602f00000000}\folder\file.txt
+ *
+ * It means that the most common path prefix \??\ is also NT path
+ * symlink (to \GLOBAL??). It is less common that second path
+ * separator is double backslash, but it is valid.
+ *
+ * Volume guid is randomly generated by the target system and so
+ * only the target system knows the mapping between guid and the
+ * hardisk number. Over SMB it is not possible to resolve this
+ * mapping, therefore symlinks pointing to target location of
+ * volume guids are totally unusable over SMB.
+ *
+ * For now parse only symlink paths available for DOS and Win32.
+ * Those are paths with \??\ prefix or paths which points to \??\
+ * via other NT symlink (\DosDevices\, \GLOBAL??\, ...).
+ */
+ abs_path = smb_target;
+globalroot:
+ if (strstarts(abs_path, "\\??\\"))
+ abs_path += sizeof("\\??\\")-1;
+ else if (strstarts(abs_path, "\\DosDevices\\"))
+ abs_path += sizeof("\\DosDevices\\")-1;
+ else if (strstarts(abs_path, "\\GLOBAL??\\"))
+ abs_path += sizeof("\\GLOBAL??\\")-1;
+ else {
+ /* Unhandled absolute symlink, points outside of DOS/Win32 */
+ cifs_dbg(VFS,
+ "absolute symlink '%s' cannot be converted from NT format "
+ "because points to unknown target\n",
+ smb_target);
+ rc = -EIO;
+ goto out;
+ }
+
+ /* Sometimes path separator after \?? is double backslash */
+ if (abs_path[0] == '\\')
+ abs_path++;
+
+ while (strstarts(abs_path, "Global\\"))
+ abs_path += sizeof("Global\\")-1;
+
+ if (strstarts(abs_path, "GLOBALROOT\\")) {
+ /* Label globalroot requires path with leading '\\', so do not trim '\\' */
+ abs_path += sizeof("GLOBALROOT")-1;
+ goto globalroot;
+ }
+
+ /* For now parse only paths to drive letters */
+ if (((abs_path[0] >= 'A' && abs_path[0] <= 'Z') ||
+ (abs_path[0] >= 'a' && abs_path[0] <= 'z')) &&
+ abs_path[1] == ':' &&
+ (abs_path[2] == '\\' || abs_path[2] == '\0')) {
+ /* Convert drive letter to lowercase and drop colon */
+ char drive_letter = abs_path[0];
+ if (drive_letter >= 'A' && drive_letter <= 'Z')
+ drive_letter += 'a'-'A';
+ abs_path++;
+ abs_path[0] = drive_letter;
+ } else {
+ /* Unhandled absolute symlink. Report an error. */
+ cifs_dbg(VFS,
+ "absolute symlink '%s' cannot be converted from NT format "
+ "because points to unknown target\n",
+ smb_target);
+ rc = -EIO;
+ goto out;
+ }
+
+ abs_path_len = strlen(abs_path)+1;
+ symlinkroot_len = strlen(cifs_sb->ctx->symlinkroot);
+ if (cifs_sb->ctx->symlinkroot[symlinkroot_len-1] == '/')
+ symlinkroot_len--;
+ linux_target = kmalloc(symlinkroot_len + 1 + abs_path_len, GFP_KERNEL);
+ if (!linux_target) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ memcpy(linux_target, cifs_sb->ctx->symlinkroot, symlinkroot_len);
+ linux_target[symlinkroot_len] = '/';
+ memcpy(linux_target + symlinkroot_len + 1, abs_path, abs_path_len);
+ } else if (smb_target[0] == sep && relative) {
/*
* This is a relative SMB symlink from the top of the share,
* which is the top level directory of the Linux mount point.
@@ -601,6 +960,12 @@ int smb2_parse_native_symlink(char **target, const char *buf, unsigned int len,
}
memcpy(linux_target + levels*3, smb_target+1, smb_target_len); /* +1 to skip leading sep */
} else {
+ /*
+ * This is either an absolute symlink in POSIX-style format
+ * or relative SMB symlink from the current directory.
+ * These paths have same format as Linux symlinks, so no
+ * conversion is needed.
+ */
linux_target = smb_target;
smb_target = NULL;
}
@@ -620,8 +985,8 @@ out:
return rc;
}
-static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym,
- u32 plen, bool unicode,
+static int parse_reparse_native_symlink(struct reparse_symlink_data_buffer *sym,
+ u32 plen,
struct cifs_sb_info *cifs_sb,
const char *full_path,
struct cifs_open_info_data *data)
@@ -641,7 +1006,6 @@ static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym,
return smb2_parse_native_symlink(&data->symlink_target,
sym->PathBuffer + offs,
len,
- unicode,
le32_to_cpu(sym->Flags) & SYMLINK_FLAG_RELATIVE,
full_path,
cifs_sb);
@@ -696,7 +1060,7 @@ static int parse_reparse_wsl_symlink(struct reparse_wsl_symlink_data_buffer *buf
int parse_reparse_point(struct reparse_data_buffer *buf,
u32 plen, struct cifs_sb_info *cifs_sb,
const char *full_path,
- bool unicode, struct cifs_open_info_data *data)
+ struct cifs_open_info_data *data)
{
struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
@@ -705,12 +1069,12 @@ int parse_reparse_point(struct reparse_data_buffer *buf,
/* See MS-FSCC 2.1.2 */
switch (le32_to_cpu(buf->ReparseTag)) {
case IO_REPARSE_TAG_NFS:
- return parse_reparse_posix((struct reparse_posix_data *)buf,
+ return parse_reparse_nfs((struct reparse_nfs_data_buffer *)buf,
cifs_sb, data);
case IO_REPARSE_TAG_SYMLINK:
- return parse_reparse_symlink(
+ return parse_reparse_native_symlink(
(struct reparse_symlink_data_buffer *)buf,
- plen, unicode, cifs_sb, full_path, data);
+ plen, cifs_sb, full_path, data);
case IO_REPARSE_TAG_LX_SYMLINK:
return parse_reparse_wsl_symlink(
(struct reparse_wsl_symlink_data_buffer *)buf,
@@ -744,14 +1108,15 @@ int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb,
buf = (struct reparse_data_buffer *)((u8 *)io +
le32_to_cpu(io->OutputOffset));
- return parse_reparse_point(buf, plen, cifs_sb, full_path, true, data);
+ return parse_reparse_point(buf, plen, cifs_sb, full_path, data);
}
-static void wsl_to_fattr(struct cifs_open_info_data *data,
+static bool wsl_to_fattr(struct cifs_open_info_data *data,
struct cifs_sb_info *cifs_sb,
u32 tag, struct cifs_fattr *fattr)
{
struct smb2_file_full_ea_info *ea;
+ bool have_xattr_dev = false;
u32 next = 0;
switch (tag) {
@@ -794,21 +1159,31 @@ static void wsl_to_fattr(struct cifs_open_info_data *data,
fattr->cf_uid = wsl_make_kuid(cifs_sb, v);
else if (!strncmp(name, SMB2_WSL_XATTR_GID, nlen))
fattr->cf_gid = wsl_make_kgid(cifs_sb, v);
- else if (!strncmp(name, SMB2_WSL_XATTR_MODE, nlen))
+ else if (!strncmp(name, SMB2_WSL_XATTR_MODE, nlen)) {
+ /* File type in reparse point tag and in xattr mode must match. */
+ if (S_DT(fattr->cf_mode) != S_DT(le32_to_cpu(*(__le32 *)v)))
+ return false;
fattr->cf_mode = (umode_t)le32_to_cpu(*(__le32 *)v);
- else if (!strncmp(name, SMB2_WSL_XATTR_DEV, nlen))
+ } else if (!strncmp(name, SMB2_WSL_XATTR_DEV, nlen)) {
fattr->cf_rdev = reparse_mkdev(v);
+ have_xattr_dev = true;
+ }
} while (next);
out:
+
+ /* Major and minor numbers for char and block devices are mandatory. */
+ if (!have_xattr_dev && (tag == IO_REPARSE_TAG_LX_CHR || tag == IO_REPARSE_TAG_LX_BLK))
+ return false;
+
fattr->cf_dtype = S_DT(fattr->cf_mode);
+ return true;
}
static bool posix_reparse_to_fattr(struct cifs_sb_info *cifs_sb,
struct cifs_fattr *fattr,
struct cifs_open_info_data *data)
{
- struct reparse_posix_data *buf = data->reparse.posix;
-
+ struct reparse_nfs_data_buffer *buf = (struct reparse_nfs_data_buffer *)data->reparse.buf;
if (buf == NULL)
return true;
@@ -874,7 +1249,9 @@ bool cifs_reparse_point_to_fattr(struct cifs_sb_info *cifs_sb,
case IO_REPARSE_TAG_AF_UNIX:
case IO_REPARSE_TAG_LX_CHR:
case IO_REPARSE_TAG_LX_BLK:
- wsl_to_fattr(data, cifs_sb, tag, fattr);
+ ok = wsl_to_fattr(data, cifs_sb, tag, fattr);
+ if (!ok)
+ return false;
break;
case IO_REPARSE_TAG_NFS:
ok = posix_reparse_to_fattr(cifs_sb, fattr, data);
diff --git a/fs/smb/client/reparse.h b/fs/smb/client/reparse.h
index ff05b0e75c92..5a753fec7e2c 100644
--- a/fs/smb/client/reparse.h
+++ b/fs/smb/client/reparse.h
@@ -50,6 +50,7 @@ static inline kgid_t wsl_make_kgid(struct cifs_sb_info *cifs_sb,
static inline u64 reparse_mode_nfs_type(mode_t mode)
{
switch (mode & S_IFMT) {
+ case S_IFLNK: return NFS_SPECFILE_LNK;
case S_IFBLK: return NFS_SPECFILE_BLK;
case S_IFCHR: return NFS_SPECFILE_CHR;
case S_IFIFO: return NFS_SPECFILE_FIFO;
@@ -61,6 +62,7 @@ static inline u64 reparse_mode_nfs_type(mode_t mode)
static inline u32 reparse_mode_wsl_tag(mode_t mode)
{
switch (mode & S_IFMT) {
+ case S_IFLNK: return IO_REPARSE_TAG_LX_SYMLINK;
case S_IFBLK: return IO_REPARSE_TAG_LX_BLK;
case S_IFCHR: return IO_REPARSE_TAG_LX_CHR;
case S_IFIFO: return IO_REPARSE_TAG_LX_FIFO;
diff --git a/fs/smb/client/sess.c b/fs/smb/client/sess.c
index 91d4d409cb1d..faa80e7d54a6 100644
--- a/fs/smb/client/sess.c
+++ b/fs/smb/client/sess.c
@@ -1235,12 +1235,13 @@ cifs_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
switch (requested) {
case Kerberos:
case RawNTLMSSP:
+ case IAKerb:
return requested;
case Unspecified:
if (server->sec_ntlmssp &&
(global_secflags & CIFSSEC_MAY_NTLMSSP))
return RawNTLMSSP;
- if ((server->sec_kerberos || server->sec_mskerberos) &&
+ if ((server->sec_kerberos || server->sec_mskerberos || server->sec_iakerb) &&
(global_secflags & CIFSSEC_MAY_KRB5))
return Kerberos;
fallthrough;
diff --git a/fs/smb/client/smb1ops.c b/fs/smb/client/smb1ops.c
index 749a83cd0deb..9756b876a75e 100644
--- a/fs/smb/client/smb1ops.c
+++ b/fs/smb/client/smb1ops.c
@@ -551,7 +551,7 @@ static int cifs_query_path_info(const unsigned int xid,
int rc;
FILE_ALL_INFO fi = {};
- data->symlink = false;
+ data->reparse_point = false;
data->adjust_tz = false;
/* could do find first instead but this returns more info */
@@ -569,32 +569,8 @@ static int cifs_query_path_info(const unsigned int xid,
}
if (!rc) {
- int tmprc;
- int oplock = 0;
- struct cifs_fid fid;
- struct cifs_open_parms oparms;
-
move_cifs_info_to_smb2(&data->fi, &fi);
-
- if (!(le32_to_cpu(fi.Attributes) & ATTR_REPARSE))
- return 0;
-
- oparms = (struct cifs_open_parms) {
- .tcon = tcon,
- .cifs_sb = cifs_sb,
- .desired_access = FILE_READ_ATTRIBUTES,
- .create_options = cifs_create_options(cifs_sb, 0),
- .disposition = FILE_OPEN,
- .path = full_path,
- .fid = &fid,
- };
-
- /* Need to check if this is a symbolic link or not */
- tmprc = CIFS_open(xid, &oparms, &oplock, NULL);
- if (tmprc == -EOPNOTSUPP)
- data->symlink = true;
- else if (tmprc == 0)
- CIFSSMBClose(xid, tcon, fid.netfid);
+ data->reparse_point = le32_to_cpu(fi.Attributes) & ATTR_REPARSE;
}
return rc;
@@ -1010,7 +986,7 @@ static int cifs_parse_reparse_point(struct cifs_sb_info *cifs_sb,
buf = (struct reparse_data_buffer *)((__u8 *)&io->hdr.Protocol +
le32_to_cpu(io->DataOffset));
- return parse_reparse_point(buf, plen, cifs_sb, full_path, true, data);
+ return parse_reparse_point(buf, plen, cifs_sb, full_path, data);
}
static bool
diff --git a/fs/smb/client/smb2file.c b/fs/smb/client/smb2file.c
index 9ec44eab8dbc..d609a20fb98a 100644
--- a/fs/smb/client/smb2file.c
+++ b/fs/smb/client/smb2file.c
@@ -63,6 +63,52 @@ static struct smb2_symlink_err_rsp *symlink_data(const struct kvec *iov)
return sym;
}
+int smb2_fix_symlink_target_type(char **target, bool directory, struct cifs_sb_info *cifs_sb)
+{
+ char *buf;
+ int len;
+
+ /*
+ * POSIX server does not distinguish between symlinks to file and
+ * symlink directory. So nothing is needed to fix on the client side.
+ */
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
+ return 0;
+
+ if (!*target)
+ return -EIO;
+
+ len = strlen(*target);
+ if (!len)
+ return -EIO;
+
+ /*
+ * If this is directory symlink and it does not have trailing slash then
+ * append it. Trailing slash simulates Windows/SMB behavior which do not
+ * allow resolving directory symlink to file.
+ */
+ if (directory && (*target)[len-1] != '/') {
+ buf = krealloc(*target, len+2, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+ buf[len] = '/';
+ buf[len+1] = '\0';
+ *target = buf;
+ len++;
+ }
+
+ /*
+ * If this is a file (non-directory) symlink and it points to path name
+ * with trailing slash then this is an invalid symlink because file name
+ * cannot contain slash character. File name with slash is invalid on
+ * both Windows and Linux systems. So return an error for such symlink.
+ */
+ if (!directory && (*target)[len-1] == '/')
+ return -EIO;
+
+ return 0;
+}
+
int smb2_parse_symlink_response(struct cifs_sb_info *cifs_sb, const struct kvec *iov,
const char *full_path, char **path)
{
@@ -89,7 +135,6 @@ int smb2_parse_symlink_response(struct cifs_sb_info *cifs_sb, const struct kvec
return smb2_parse_native_symlink(path,
(char *)sym->PathBuffer + sub_offs,
sub_len,
- true,
le32_to_cpu(sym->Flags) & SYMLINK_FLAG_RELATIVE,
full_path,
cifs_sb);
@@ -133,6 +178,11 @@ int smb2_open_file(const unsigned int xid, struct cifs_open_parms *oparms, __u32
NULL, NULL, NULL);
oparms->create_options &= ~OPEN_REPARSE_POINT;
}
+ if (!rc) {
+ bool directory = le32_to_cpu(data->fi.Attributes) & ATTR_DIRECTORY;
+ rc = smb2_fix_symlink_target_type(&data->symlink_target,
+ directory, oparms->cifs_sb);
+ }
}
}
diff --git a/fs/smb/client/smb2inode.c b/fs/smb/client/smb2inode.c
index c97f14757c27..5dfb30b0a852 100644
--- a/fs/smb/client/smb2inode.c
+++ b/fs/smb/client/smb2inode.c
@@ -1010,6 +1010,11 @@ int smb2_query_path_info(const unsigned int xid,
else
rc = -EOPNOTSUPP;
}
+
+ if (data->reparse.tag == IO_REPARSE_TAG_SYMLINK && !rc) {
+ bool directory = le32_to_cpu(data->fi.Attributes) & ATTR_DIRECTORY;
+ rc = smb2_fix_symlink_target_type(&data->symlink_target, directory, cifs_sb);
+ }
break;
case -EREMOTE:
break;
diff --git a/fs/smb/client/smb2maperror.c b/fs/smb/client/smb2maperror.c
index b05313acf9b2..12c2b868789f 100644
--- a/fs/smb/client/smb2maperror.c
+++ b/fs/smb/client/smb2maperror.c
@@ -380,7 +380,7 @@ static const struct status_to_posix_error smb2_error_map_table[] = {
{STATUS_NO_LOGON_SERVERS, -EIO, "STATUS_NO_LOGON_SERVERS"},
{STATUS_NO_SUCH_LOGON_SESSION, -EIO, "STATUS_NO_SUCH_LOGON_SESSION"},
{STATUS_NO_SUCH_PRIVILEGE, -EIO, "STATUS_NO_SUCH_PRIVILEGE"},
- {STATUS_PRIVILEGE_NOT_HELD, -EIO, "STATUS_PRIVILEGE_NOT_HELD"},
+ {STATUS_PRIVILEGE_NOT_HELD, -EPERM, "STATUS_PRIVILEGE_NOT_HELD"},
{STATUS_INVALID_ACCOUNT_NAME, -EIO, "STATUS_INVALID_ACCOUNT_NAME"},
{STATUS_USER_EXISTS, -EIO, "STATUS_USER_EXISTS"},
{STATUS_NO_SUCH_USER, -EIO, "STATUS_NO_SUCH_USER"},
@@ -871,7 +871,7 @@ static const struct status_to_posix_error smb2_error_map_table[] = {
{STATUS_VALIDATE_CONTINUE, -EIO, "STATUS_VALIDATE_CONTINUE"},
{STATUS_NO_MATCH, -EIO, "STATUS_NO_MATCH"},
{STATUS_NO_MORE_MATCHES, -EIO, "STATUS_NO_MORE_MATCHES"},
- {STATUS_NOT_A_REPARSE_POINT, -EIO, "STATUS_NOT_A_REPARSE_POINT"},
+ {STATUS_NOT_A_REPARSE_POINT, -ENODATA, "STATUS_NOT_A_REPARSE_POINT"},
{STATUS_IO_REPARSE_TAG_INVALID, -EIO, "STATUS_IO_REPARSE_TAG_INVALID"},
{STATUS_IO_REPARSE_TAG_MISMATCH, -EIO,
"STATUS_IO_REPARSE_TAG_MISMATCH"},
diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c
index d640dcabc305..77309217dab4 100644
--- a/fs/smb/client/smb2ops.c
+++ b/fs/smb/client/smb2ops.c
@@ -5077,6 +5077,7 @@ int __cifs_sfu_make_node(unsigned int xid, struct inode *inode,
{
struct TCP_Server_Info *server = tcon->ses->server;
struct cifs_open_parms oparms;
+ struct cifs_open_info_data idata;
struct cifs_io_parms io_parms = {};
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
struct cifs_fid fid;
@@ -5146,10 +5147,20 @@ int __cifs_sfu_make_node(unsigned int xid, struct inode *inode,
CREATE_OPTION_SPECIAL, ACL_NO_MODE);
oparms.fid = &fid;
- rc = server->ops->open(xid, &oparms, &oplock, NULL);
+ rc = server->ops->open(xid, &oparms, &oplock, &idata);
if (rc)
goto out;
+ /*
+ * Check if the server honored ATTR_SYSTEM flag by CREATE_OPTION_SPECIAL
+ * option. If not then server does not support ATTR_SYSTEM and newly
+ * created file is not SFU compatible, which means that the call failed.
+ */
+ if (!(le32_to_cpu(idata.fi.Attributes) & ATTR_SYSTEM)) {
+ rc = -EOPNOTSUPP;
+ goto out_close;
+ }
+
if (type_len + data_len > 0) {
io_parms.pid = current->tgid;
io_parms.tcon = tcon;
@@ -5164,8 +5175,18 @@ int __cifs_sfu_make_node(unsigned int xid, struct inode *inode,
iov, ARRAY_SIZE(iov)-1);
}
+out_close:
server->ops->close(xid, tcon, &fid);
+ /*
+ * If CREATE was successful but either setting ATTR_SYSTEM failed or
+ * writing type/data information failed then remove the intermediate
+ * object created by CREATE. Otherwise intermediate empty object stay
+ * on the server.
+ */
+ if (rc)
+ server->ops->unlink(xid, tcon, full_path, cifs_sb, NULL);
+
out:
kfree(symname_utf16);
return rc;
diff --git a/fs/smb/client/smb2pdu.c b/fs/smb/client/smb2pdu.c
index 9f54596a6866..40ad9e79437a 100644
--- a/fs/smb/client/smb2pdu.c
+++ b/fs/smb/client/smb2pdu.c
@@ -1429,7 +1429,7 @@ smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
if (server->sec_ntlmssp &&
(global_secflags & CIFSSEC_MAY_NTLMSSP))
return RawNTLMSSP;
- if ((server->sec_kerberos || server->sec_mskerberos) &&
+ if ((server->sec_kerberos || server->sec_mskerberos || server->sec_iakerb) &&
(global_secflags & CIFSSEC_MAY_KRB5))
return Kerberos;
fallthrough;
diff --git a/fs/smb/client/smb2proto.h b/fs/smb/client/smb2proto.h
index 09349fa8da03..2336dfb23f36 100644
--- a/fs/smb/client/smb2proto.h
+++ b/fs/smb/client/smb2proto.h
@@ -111,8 +111,9 @@ extern int smb3_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb,
const unsigned char *path, char *pbuf,
unsigned int *pbytes_read);
+int smb2_fix_symlink_target_type(char **target, bool directory, struct cifs_sb_info *cifs_sb);
int smb2_parse_native_symlink(char **target, const char *buf, unsigned int len,
- bool unicode, bool relative,
+ bool relative,
const char *full_path,
struct cifs_sb_info *cifs_sb);
int smb2_parse_symlink_response(struct cifs_sb_info *cifs_sb,
diff --git a/fs/smb/common/smb2pdu.h b/fs/smb/common/smb2pdu.h
index 3c7c706c797d..3336df2ea5d4 100644
--- a/fs/smb/common/smb2pdu.h
+++ b/fs/smb/common/smb2pdu.h
@@ -1550,7 +1550,19 @@ struct reparse_symlink_data_buffer {
__u8 PathBuffer[]; /* Variable Length */
} __packed;
-/* See MS-FSCC 2.1.2.6 and cifspdu.h for struct reparse_posix_data */
+/* For IO_REPARSE_TAG_NFS - see MS-FSCC 2.1.2.6 */
+#define NFS_SPECFILE_LNK 0x00000000014B4E4C
+#define NFS_SPECFILE_CHR 0x0000000000524843
+#define NFS_SPECFILE_BLK 0x00000000004B4C42
+#define NFS_SPECFILE_FIFO 0x000000004F464946
+#define NFS_SPECFILE_SOCK 0x000000004B434F53
+struct reparse_nfs_data_buffer {
+ __le32 ReparseTag;
+ __le16 ReparseDataLength;
+ __u16 Reserved;
+ __le64 InodeType; /* NFS_SPECFILE_* */
+ __u8 DataBuffer[];
+} __packed;
/* For IO_REPARSE_TAG_LX_SYMLINK */
struct reparse_wsl_symlink_data_buffer {
generated by cgit (git 2.34.1) at 2025-05-16 11:25:18 +0000