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13 cifs/smb3 client fixes 

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Merge tag '6.2-rc-smb3-client-fixes-part1' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs client updates from Steve French:

 - SMB3.1.1 POSIX Extensions fixes

 - remove use of generic_writepages() and ->cifs_writepage(), in favor
   of ->cifs_writepages() and ->migrate_folio()

 - memory management fixes

 - mount parm parsing fixes

 - minor cleanup fixes

* tag '6.2-rc-smb3-client-fixes-part1' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: Remove duplicated include in cifsglob.h
  cifs: fix oops during encryption
  cifs: print warning when conflicting soft vs. hard mount options specified
  cifs: fix missing display of three mount options
  cifs: fix various whitespace errors in headers
  cifs: minor cleanup of some headers
  cifs: skip alloc when request has no pages
  cifs: remove ->writepage
  cifs: stop using generic_writepages
  cifs: wire up >migrate_folio
  cifs: Parse owner/group for stat in smb311 posix extensions
  cifs: Add "extbuf" and "extbuflen" args to smb2_compound_op()
  Fix path in cifs/usage.rst
This commit is contained in:
Linus Torvalds 2022-12-15 14:53:14 -08:00
parent ec9187ecea d74f4a3f6d
commit 851f657a86
14 changed files with 300 additions and 168 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/admin-guide/cifs/usage.rst
View File

@ -858,7 +858,7 @@ CIFS kernel module parameters
These module parameters can be specified or modified either during the time of
module loading or during the runtime by using the interface::
/proc/module/cifs/parameters/<param>
/sys/module/cifs/parameters/<param>
i.e.::

2
fs/cifs/cifs_ioctl.h
View File

@ -108,7 +108,7 @@ struct smb3_notify_info {
#define CIFS_IOC_NOTIFY _IOW(CIFS_IOCTL_MAGIC, 9, struct smb3_notify)
#define CIFS_DUMP_FULL_KEY _IOWR(CIFS_IOCTL_MAGIC, 10, struct smb3_full_key_debug_info)
#define CIFS_IOC_NOTIFY_INFO _IOWR(CIFS_IOCTL_MAGIC, 11, struct smb3_notify_info)
#define CIFS_IOC_SHUTDOWN _IOR ('X', 125, __u32)
#define CIFS_IOC_SHUTDOWN _IOR('X', 125, __u32)
/*
* Flags for going down operation

8
fs/cifs/cifsfs.c
View File

@ -678,9 +678,15 @@ cifs_show_options(struct seq_file *s, struct dentry *root)
seq_printf(s, ",echo_interval=%lu",
tcon->ses->server->echo_interval / HZ);
/* Only display max_credits if it was overridden on mount */
/* Only display the following if overridden on mount */
if (tcon->ses->server->max_credits != SMB2_MAX_CREDITS_AVAILABLE)
seq_printf(s, ",max_credits=%u", tcon->ses->server->max_credits);
if (tcon->ses->server->tcp_nodelay)
seq_puts(s, ",tcpnodelay");
if (tcon->ses->server->noautotune)
seq_puts(s, ",noautotune");
if (tcon->ses->server->noblocksnd)
seq_puts(s, ",noblocksend");
if (tcon->snapshot_time)
seq_printf(s, ",snapshot=%llu", tcon->snapshot_time);

4
fs/cifs/cifsfs.h
View File

@ -105,8 +105,8 @@ extern int cifs_lock(struct file *, int, struct file_lock *);
extern int cifs_fsync(struct file *, loff_t, loff_t, int);
extern int cifs_strict_fsync(struct file *, loff_t, loff_t, int);
extern int cifs_flush(struct file *, fl_owner_t id);
extern int cifs_file_mmap(struct file * , struct vm_area_struct *);
extern int cifs_file_strict_mmap(struct file * , struct vm_area_struct *);
extern int cifs_file_mmap(struct file *file, struct vm_area_struct *vma);
extern int cifs_file_strict_mmap(struct file *file, struct vm_area_struct *vma);
extern const struct file_operations cifs_dir_ops;
extern int cifs_dir_open(struct inode *inode, struct file *file);
extern int cifs_readdir(struct file *file, struct dir_context *ctx);

76
fs/cifs/cifsglob.h
View File

@ -13,6 +13,8 @@
#include <linux/in6.h>
#include <linux/inet.h>
#include <linux/slab.h>
#include <linux/scatterlist.h>
#include <linux/mm.h>
#include <linux/mempool.h>
#include <linux/workqueue.h>
#include <linux/utsname.h>
@ -21,7 +23,6 @@
#include "cifs_fs_sb.h"
#include "cifsacl.h"
#include <crypto/internal/hash.h>
#include <linux/scatterlist.h>
#include <uapi/linux/cifs/cifs_mount.h>
#include "../smbfs_common/smb2pdu.h"
#include "smb2pdu.h"
@ -785,6 +786,7 @@ static inline unsigned int
in_flight(struct TCP_Server_Info *server)
{
unsigned int num;
spin_lock(&server->req_lock);
num = server->in_flight;
spin_unlock(&server->req_lock);
@ -795,6 +797,7 @@ static inline bool
has_credits(struct TCP_Server_Info *server, int *credits, int num_credits)
{
int num;
spin_lock(&server->req_lock);
num = *credits;
spin_unlock(&server->req_lock);
@ -1025,7 +1028,7 @@ struct cifs_ses {
struct TCP_Server_Info *server; /* pointer to server info */
int ses_count; /* reference counter */
enum ses_status_enum ses_status; /* updates protected by cifs_tcp_ses_lock */
unsigned overrideSecFlg; /* if non-zero override global sec flags */
unsigned int overrideSecFlg; /* if non-zero override global sec flags */
char *serverOS; /* name of operating system underlying server */
char *serverNOS; /* name of network operating system of server */
char *serverDomain; /* security realm of server */
@ -1381,7 +1384,7 @@ struct cifsFileInfo {
__u32 pid; /* process id who opened file */
struct cifs_fid fid; /* file id from remote */
struct list_head rlist; /* reconnect list */
/* BB add lock scope info here if needed */ ;
/* BB add lock scope info here if needed */
/* lock scope id (0 if none) */
struct dentry *dentry;
struct tcon_link *tlink;
@ -1769,6 +1772,7 @@ static inline void free_dfs_info_array(struct dfs_info3_param *param,
int number_of_items)
{
int i;
if ((number_of_items == 0) || (param == NULL))
return;
for (i = 0; i < number_of_items; i++) {
@ -2137,4 +2141,70 @@ static inline void move_cifs_info_to_smb2(struct smb2_file_all_info *dst, const
dst->FileNameLength = src->FileNameLength;
}
static inline unsigned int cifs_get_num_sgs(const struct smb_rqst *rqst,
int num_rqst,
const u8 *sig)
{
unsigned int len, skip;
unsigned int nents = 0;
unsigned long addr;
int i, j;
/* Assumes the first rqst has a transform header as the first iov.
* I.e.
* rqst[0].rq_iov[0] is transform header
* rqst[0].rq_iov[1+] data to be encrypted/decrypted
* rqst[1+].rq_iov[0+] data to be encrypted/decrypted
*/
for (i = 0; i < num_rqst; i++) {
/*
* The first rqst has a transform header where the
* first 20 bytes are not part of the encrypted blob.
*/
for (j = 0; j < rqst[i].rq_nvec; j++) {
struct kvec *iov = &rqst[i].rq_iov[j];
skip = (i == 0) && (j == 0) ? 20 : 0;
addr = (unsigned long)iov->iov_base + skip;
if (unlikely(is_vmalloc_addr((void *)addr))) {
len = iov->iov_len - skip;
nents += DIV_ROUND_UP(offset_in_page(addr) + len,
PAGE_SIZE);
} else {
nents++;
}
}
nents += rqst[i].rq_npages;
}
nents += DIV_ROUND_UP(offset_in_page(sig) + SMB2_SIGNATURE_SIZE, PAGE_SIZE);
return nents;
}
/* We can not use the normal sg_set_buf() as we will sometimes pass a
* stack object as buf.
*/
static inline struct scatterlist *cifs_sg_set_buf(struct scatterlist *sg,
const void *buf,
unsigned int buflen)
{
unsigned long addr = (unsigned long)buf;
unsigned int off = offset_in_page(addr);
addr &= PAGE_MASK;
if (unlikely(is_vmalloc_addr((void *)addr))) {
do {
unsigned int len = min_t(unsigned int, buflen, PAGE_SIZE - off);
sg_set_page(sg++, vmalloc_to_page((void *)addr), len, off);
off = 0;
addr += PAGE_SIZE;
buflen -= len;
} while (buflen);
} else {
sg_set_page(sg++, virt_to_page(addr), buflen, off);
}
return sg;
}
#endif /* _CIFS_GLOB_H */

50
fs/cifs/cifspdu.h
View File

@ -1429,7 +1429,7 @@ typedef struct smb_com_transaction_change_notify_req {
__u8 WatchTree; /* 1 = Monitor subdirectories */
__u8 Reserved2;
__le16 ByteCount;
/* __u8 Pad[3];*/
/* __u8 Pad[3];*/
/* __u8 Data[1];*/
} __attribute__((packed)) TRANSACT_CHANGE_NOTIFY_REQ;
@ -1752,8 +1752,7 @@ struct smb_com_transaction2_sfi_rsp {
struct smb_hdr hdr; /* wct = 10 + SetupCount */
struct trans2_resp t2;
__u16 ByteCount;
__u16 Reserved2; /* parameter word reserved -
present for infolevels > 100 */
__u16 Reserved2; /* parameter word reserved - present for infolevels > 100 */
} __attribute__((packed));
struct smb_t2_qfi_req {
@ -1768,8 +1767,7 @@ struct smb_t2_qfi_rsp {
struct smb_hdr hdr; /* wct = 10 + SetupCount */
struct trans2_resp t2;
__u16 ByteCount;
__u16 Reserved2; /* parameter word reserved -
present for infolevels > 100 */
__u16 Reserved2; /* parameter word reserved - present for infolevels > 100 */
} __attribute__((packed));
/*
@ -2146,13 +2144,11 @@ typedef struct {
#define CIFS_UNIX_POSIX_PATH_OPS_CAP 0x00000020 /* Allow new POSIX path based
calls including posix open
and posix unlink */
#define CIFS_UNIX_LARGE_READ_CAP 0x00000040 /* support reads >128K (up
to 0xFFFF00 */
#define CIFS_UNIX_LARGE_READ_CAP 0x00000040 /* support reads >128K (up to 0xFFFF00 */
#define CIFS_UNIX_LARGE_WRITE_CAP 0x00000080
#define CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP 0x00000100 /* can do SPNEGO crypt */
#define CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP 0x00000200 /* must do */
#define CIFS_UNIX_PROXY_CAP 0x00000400 /* Proxy cap: 0xACE ioctl and
QFS PROXY call */
#define CIFS_UNIX_PROXY_CAP 0x00000400 /* Proxy cap: 0xACE ioctl and QFS PROXY call */
#ifdef CONFIG_CIFS_POSIX
/* presumably don't need the 0x20 POSIX_PATH_OPS_CAP since we never send
LockingX instead of posix locking call on unix sess (and we do not expect
@ -2368,8 +2364,7 @@ typedef struct {
struct file_allocation_info {
__le64 AllocationSize; /* Note old Samba srvr rounds this up too much */
} __attribute__((packed)); /* size used on disk, for level 0x103 for set,
0x105 for query */
} __packed; /* size used on disk, for level 0x103 for set, 0x105 for query */
struct file_end_of_file_info {
__le64 FileSize; /* offset to end of file */
@ -2409,8 +2404,7 @@ struct cifs_posix_acl { /* access conrol list (ACL) */
__le16 access_entry_count; /* access ACL - count of entries */
__le16 default_entry_count; /* default ACL - count of entries */
struct cifs_posix_ace ace_array[];
/* followed by
struct cifs_posix_ace default_ace_arraay[] */
/* followed by struct cifs_posix_ace default_ace_array[] */
} __attribute__((packed)); /* level 0x204 */
/* types of access control entries already defined in posix_acl.h */
@ -2429,17 +2423,17 @@ struct cifs_posix_acl { /* access conrol list (ACL) */
/* end of POSIX ACL definitions */
/* POSIX Open Flags */
#define SMB_O_RDONLY 0x1
#define SMB_O_WRONLY 0x2
#define SMB_O_RDWR 0x4
#define SMB_O_CREAT 0x10
#define SMB_O_EXCL 0x20
#define SMB_O_TRUNC 0x40
#define SMB_O_APPEND 0x80
#define SMB_O_SYNC 0x100
#define SMB_O_DIRECTORY 0x200
#define SMB_O_NOFOLLOW 0x400
#define SMB_O_DIRECT 0x800
#define SMB_O_RDONLY 0x1
#define SMB_O_WRONLY 0x2
#define SMB_O_RDWR 0x4
#define SMB_O_CREAT 0x10
#define SMB_O_EXCL 0x20
#define SMB_O_TRUNC 0x40
#define SMB_O_APPEND 0x80
#define SMB_O_SYNC 0x100
#define SMB_O_DIRECTORY 0x200
#define SMB_O_NOFOLLOW 0x400
#define SMB_O_DIRECT 0x800
typedef struct {
__le32 OpenFlags; /* same as NT CreateX */
@ -2716,15 +2710,13 @@ typedef struct file_xattr_info {
__u32 xattr_value_len;
char xattr_name[];
/* followed by xattr_value[xattr_value_len], no pad */
} __attribute__((packed)) FILE_XATTR_INFO; /* extended attribute info
level 0x205 */
} __packed FILE_XATTR_INFO; /* extended attribute info level 0x205 */
/* flags for lsattr and chflags commands removed arein uapi/linux/fs.h */
typedef struct file_chattr_info {
__le64 mask; /* list of all possible attribute bits */
__le64 mode; /* list of actual attribute bits on this inode */
} __attribute__((packed)) FILE_CHATTR_INFO; /* ext attributes
(chattr, chflags) level 0x206 */
#endif /* POSIX */
} __packed FILE_CHATTR_INFO; /* ext attributes (chattr, chflags) level 0x206 */
#endif /* POSIX */
#endif /* _CIFSPDU_H */

6
fs/cifs/cifsproto.h
View File

@ -124,7 +124,7 @@ extern int SendReceive2(const unsigned int /* xid */ , struct cifs_ses *,
struct kvec * /* resp vec */);
extern int SendReceiveBlockingLock(const unsigned int xid,
struct cifs_tcon *ptcon,
struct smb_hdr *in_buf ,
struct smb_hdr *in_buf,
struct smb_hdr *out_buf,
int *bytes_returned);
void
@ -604,8 +604,8 @@ int setup_aio_ctx_iter(struct cifs_aio_ctx *ctx, struct iov_iter *iter, int rw);
int cifs_alloc_hash(const char *name, struct shash_desc **sdesc);
void cifs_free_hash(struct shash_desc **sdesc);
extern void rqst_page_get_length(struct smb_rqst *rqst, unsigned int page,
unsigned int *len, unsigned int *offset);
void rqst_page_get_length(const struct smb_rqst *rqst, unsigned int page,
unsigned int *len, unsigned int *offset);
struct cifs_chan *
cifs_ses_find_chan(struct cifs_ses *ses, struct TCP_Server_Info *server);
int cifs_try_adding_channels(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses);

36
fs/cifs/file.c
View File

@ -2646,6 +2646,21 @@ wdata_send_pages(struct cifs_writedata *wdata, unsigned int nr_pages,
return rc;
}
static int
cifs_writepage_locked(struct page *page, struct writeback_control *wbc);
static int cifs_write_one_page(struct page *page, struct writeback_control *wbc,
void *data)
{
struct address_space *mapping = data;
int ret;
ret = cifs_writepage_locked(page, wbc);
unlock_page(page);
mapping_set_error(mapping, ret);
return ret;
}
static int cifs_writepages(struct address_space *mapping,
struct writeback_control *wbc)
{
@ -2662,10 +2677,11 @@ static int cifs_writepages(struct address_space *mapping,
/*
* If wsize is smaller than the page cache size, default to writing
* one page at a time via cifs_writepage
* one page at a time.
*/
if (cifs_sb->ctx->wsize < PAGE_SIZE)
return generic_writepages(mapping, wbc);
return write_cache_pages(mapping, wbc, cifs_write_one_page,
mapping);
xid = get_xid();
if (wbc->range_cyclic) {
@ -2852,13 +2868,6 @@ retry_write:
return rc;
}
static int cifs_writepage(struct page *page, struct writeback_control *wbc)
{
int rc = cifs_writepage_locked(page, wbc);
unlock_page(page);
return rc;
}
static int cifs_write_end(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
struct page *page, void *fsdata)
@ -5231,7 +5240,6 @@ static bool cifs_dirty_folio(struct address_space *mapping, struct folio *folio)
const struct address_space_operations cifs_addr_ops = {
.read_folio = cifs_read_folio,
.readahead = cifs_readahead,
.writepage = cifs_writepage,
.writepages = cifs_writepages,
.write_begin = cifs_write_begin,
.write_end = cifs_write_end,
@ -5240,10 +5248,10 @@ const struct address_space_operations cifs_addr_ops = {
.direct_IO = cifs_direct_io,
.invalidate_folio = cifs_invalidate_folio,
.launder_folio = cifs_launder_folio,
.migrate_folio = filemap_migrate_folio,
/*
* TODO: investigate and if useful we could add an cifs_migratePage
* helper (under an CONFIG_MIGRATION) in the future, and also
* investigate and add an is_dirty_writeback helper if needed
* TODO: investigate and if useful we could add an is_dirty_writeback
* helper if needed
*/
.swap_activate = cifs_swap_activate,
.swap_deactivate = cifs_swap_deactivate,
@ -5256,7 +5264,6 @@ const struct address_space_operations cifs_addr_ops = {
*/
const struct address_space_operations cifs_addr_ops_smallbuf = {
.read_folio = cifs_read_folio,
.writepage = cifs_writepage,
.writepages = cifs_writepages,
.write_begin = cifs_write_begin,
.write_end = cifs_write_end,
@ -5264,4 +5271,5 @@ const struct address_space_operations cifs_addr_ops_smallbuf = {
.release_folio = cifs_release_folio,
.invalidate_folio = cifs_invalidate_folio,
.launder_folio = cifs_launder_folio,
.migrate_folio = filemap_migrate_folio,
};

11
fs/cifs/fs_context.c
View File

@ -884,16 +884,21 @@ static int smb3_fs_context_parse_param(struct fs_context *fc,
ctx->nodfs = 1;
break;
case Opt_hard:
if (result.negated)
if (result.negated) {
if (ctx->retry == 1)
cifs_dbg(VFS, "conflicting hard vs. soft mount options\n");
ctx->retry = 0;
else
} else
ctx->retry = 1;
break;
case Opt_soft:
if (result.negated)
ctx->retry = 1;
else
else {
if (ctx->retry == 1)
cifs_dbg(VFS, "conflicting hard vs soft mount options\n");
ctx->retry = 0;
}
break;
case Opt_mapposix:
if (result.negated)

13
fs/cifs/inode.c
View File

@ -632,6 +632,8 @@ static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
/* Fill a cifs_fattr struct with info from POSIX info struct */
static void smb311_posix_info_to_fattr(struct cifs_fattr *fattr, struct cifs_open_info_data *data,
struct cifs_sid *owner,
struct cifs_sid *group,
struct super_block *sb, bool adjust_tz, bool symlink)
{
struct smb311_posix_qinfo *info = &data->posix_fi;
@ -680,8 +682,8 @@ static void smb311_posix_info_to_fattr(struct cifs_fattr *fattr, struct cifs_ope
}
/* else if reparse point ... TODO: add support for FIFO and blk dev; special file types */
fattr->cf_uid = cifs_sb->ctx->linux_uid; /* TODO: map uid and gid from SID */
fattr->cf_gid = cifs_sb->ctx->linux_gid;
sid_to_id(cifs_sb, owner, fattr, SIDOWNER);
sid_to_id(cifs_sb, group, fattr, SIDGROUP);
cifs_dbg(FYI, "POSIX query info: mode 0x%x uniqueid 0x%llx nlink %d\n",
fattr->cf_mode, fattr->cf_uniqueid, fattr->cf_nlink);
@ -1175,6 +1177,7 @@ smb311_posix_get_inode_info(struct inode **inode,
struct cifs_fattr fattr = {0};
bool symlink = false;
struct cifs_open_info_data data = {};
struct cifs_sid owner, group;
int rc = 0;
int tmprc = 0;
@ -1192,7 +1195,8 @@ smb311_posix_get_inode_info(struct inode **inode,
goto out;
}
rc = smb311_posix_query_path_info(xid, tcon, cifs_sb, full_path, &data, &adjust_tz,
rc = smb311_posix_query_path_info(xid, tcon, cifs_sb, full_path, &data,
&owner, &group, &adjust_tz,
&symlink);
/*
@ -1201,7 +1205,8 @@ smb311_posix_get_inode_info(struct inode **inode,
switch (rc) {
case 0:
smb311_posix_info_to_fattr(&fattr, &data, sb, adjust_tz, symlink);
smb311_posix_info_to_fattr(&fattr, &data, &owner, &group,
sb, adjust_tz, symlink);
break;
case -EREMOTE:
/* DFS link, no metadata available on this server */

4
fs/cifs/misc.c
View File

@ -1136,8 +1136,8 @@ cifs_free_hash(struct shash_desc **sdesc)
* @len: Where to store the length for this page:
* @offset: Where to store the offset for this page
*/
void rqst_page_get_length(struct smb_rqst *rqst, unsigned int page,
unsigned int *len, unsigned int *offset)
void rqst_page_get_length(const struct smb_rqst *rqst, unsigned int page,
unsigned int *len, unsigned int *offset)
{
*len = rqst->rq_pagesz;
*offset = (page == 0) ? rqst->rq_offset : 0;

68
fs/cifs/smb2inode.c
View File

@ -59,6 +59,7 @@ static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb, const char *full_path,
__u32 desired_access, __u32 create_disposition, __u32 create_options,
umode_t mode, void *ptr, int command, struct cifsFileInfo *cfile,
__u8 **extbuf, size_t *extbuflen,
struct kvec *err_iov, int *err_buftype)
{
struct cop_vars *vars = NULL;
@ -430,6 +431,21 @@ static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
&rsp_iov[1], sizeof(idata->posix_fi) /* add SIDs */,
(char *)&idata->posix_fi);
}
if (rc == 0) {
unsigned int length = le32_to_cpu(qi_rsp->OutputBufferLength);
if (length > sizeof(idata->posix_fi)) {
char *base = (char *)rsp_iov[1].iov_base +
le16_to_cpu(qi_rsp->OutputBufferOffset) +
sizeof(idata->posix_fi);
*extbuflen = length - sizeof(idata->posix_fi);
*extbuf = kmemdup(base, *extbuflen, GFP_KERNEL);
if (!*extbuf)
rc = -ENOMEM;
} else {
rc = -EINVAL;
}
}
if (rqst[1].rq_iov)
SMB2_query_info_free(&rqst[1]);
if (rqst[2].rq_iov)
@ -539,7 +555,7 @@ int smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
cifs_get_readable_path(tcon, full_path, &cfile);
rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN,
create_options, ACL_NO_MODE, data, SMB2_OP_QUERY_INFO, cfile,
err_iov, err_buftype);
NULL, NULL, err_iov, err_buftype);
if (rc == -EOPNOTSUPP) {
if (err_iov[0].iov_base && err_buftype[0] != CIFS_NO_BUFFER &&
((struct smb2_hdr *)err_iov[0].iov_base)->Command == SMB2_CREATE &&
@ -555,7 +571,7 @@ int smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
cifs_get_readable_path(tcon, full_path, &cfile);
rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES,
FILE_OPEN, create_options, ACL_NO_MODE, data,
SMB2_OP_QUERY_INFO, cfile, NULL, NULL);
SMB2_OP_QUERY_INFO, cfile, NULL, NULL, NULL, NULL);
}
out:
@ -568,13 +584,20 @@ out:
int smb311_posix_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb, const char *full_path,
struct cifs_open_info_data *data, bool *adjust_tz, bool *reparse)
struct cifs_open_info_data *data,
struct cifs_sid *owner,
struct cifs_sid *group,
bool *adjust_tz, bool *reparse)
{
int rc;
__u32 create_options = 0;
struct cifsFileInfo *cfile;
struct kvec err_iov[3] = {};
int err_buftype[3] = {};
__u8 *sidsbuf = NULL;
__u8 *sidsbuf_end = NULL;
size_t sidsbuflen = 0;
size_t owner_len, group_len;
*adjust_tz = false;
*reparse = false;
@ -589,7 +612,7 @@ int smb311_posix_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
cifs_get_readable_path(tcon, full_path, &cfile);
rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN,
create_options, ACL_NO_MODE, data, SMB2_OP_POSIX_QUERY_INFO, cfile,
err_iov, err_buftype);
&sidsbuf, &sidsbuflen, err_iov, err_buftype);
if (rc == -EOPNOTSUPP) {
/* BB TODO: When support for special files added to Samba re-verify this path */
if (err_iov[0].iov_base && err_buftype[0] != CIFS_NO_BUFFER &&
@ -606,10 +629,31 @@ int smb311_posix_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
cifs_get_readable_path(tcon, full_path, &cfile);
rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES,
FILE_OPEN, create_options, ACL_NO_MODE, data,
SMB2_OP_POSIX_QUERY_INFO, cfile, NULL, NULL);
SMB2_OP_POSIX_QUERY_INFO, cfile,
&sidsbuf, &sidsbuflen, NULL, NULL);
}
if (rc == 0) {
sidsbuf_end = sidsbuf + sidsbuflen;
owner_len = posix_info_sid_size(sidsbuf, sidsbuf_end);
if (owner_len == -1) {
rc = -EINVAL;
goto out;
}
memcpy(owner, sidsbuf, owner_len);
group_len = posix_info_sid_size(
sidsbuf + owner_len, sidsbuf_end);
if (group_len == -1) {
rc = -EINVAL;
goto out;
}
memcpy(group, sidsbuf + owner_len, group_len);
}
out:
kfree(sidsbuf);
free_rsp_buf(err_buftype[0], err_iov[0].iov_base);
free_rsp_buf(err_buftype[1], err_iov[1].iov_base);
free_rsp_buf(err_buftype[2], err_iov[2].iov_base);
@ -624,7 +668,7 @@ smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
return smb2_compound_op(xid, tcon, cifs_sb, name,
FILE_WRITE_ATTRIBUTES, FILE_CREATE,
CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR,
NULL, NULL, NULL);
NULL, NULL, NULL, NULL, NULL);
}
void
@ -646,7 +690,7 @@ smb2_mkdir_setinfo(struct inode *inode, const char *name,
tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
FILE_WRITE_ATTRIBUTES, FILE_CREATE,
CREATE_NOT_FILE, ACL_NO_MODE,
&data, SMB2_OP_SET_INFO, cfile, NULL, NULL);
&data, SMB2_OP_SET_INFO, cfile, NULL, NULL, NULL, NULL);
if (tmprc == 0)
cifs_i->cifsAttrs = dosattrs;
}
@ -658,7 +702,7 @@ smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
drop_cached_dir_by_name(xid, tcon, name, cifs_sb);
return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
CREATE_NOT_FILE, ACL_NO_MODE,
NULL, SMB2_OP_RMDIR, NULL, NULL, NULL);
NULL, SMB2_OP_RMDIR, NULL, NULL, NULL, NULL, NULL);
}
int
@ -667,7 +711,7 @@ smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
{
return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL, NULL, NULL);
ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL, NULL, NULL, NULL, NULL);
}
static int
@ -686,7 +730,7 @@ smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
}
rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name,
command, cfile, NULL, NULL);
command, cfile, NULL, NULL, NULL, NULL);
smb2_rename_path:
kfree(smb2_to_name);
return rc;
@ -727,7 +771,7 @@ smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
return smb2_compound_op(xid, tcon, cifs_sb, full_path,
FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE,
&eof, SMB2_OP_SET_EOF, cfile, NULL, NULL);
&eof, SMB2_OP_SET_EOF, cfile, NULL, NULL, NULL, NULL);
}
int
@ -754,7 +798,7 @@ smb2_set_file_info(struct inode *inode, const char *full_path,
rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
FILE_WRITE_ATTRIBUTES, FILE_OPEN,
0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, cfile,
NULL, NULL);
NULL, NULL, NULL, NULL);
cifs_put_tlink(tlink);
return rc;
}

183
fs/cifs/smb2ops.c
View File

@ -4204,69 +4204,82 @@ fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
}
/* We can not use the normal sg_set_buf() as we will sometimes pass a
* stack object as buf.
*/
static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
unsigned int buflen)
static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
int num_rqst, const u8 *sig, u8 **iv,
struct aead_request **req, struct scatterlist **sgl,
unsigned int *num_sgs)
{
void *addr;
/*
* VMAP_STACK (at least) puts stack into the vmalloc address space
*/
if (is_vmalloc_addr(buf))
addr = vmalloc_to_page(buf);
else
addr = virt_to_page(buf);
sg_set_page(sg, addr, buflen, offset_in_page(buf));
}
unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
unsigned int iv_size = crypto_aead_ivsize(tfm);
unsigned int len;
u8 *p;
/* Assumes the first rqst has a transform header as the first iov.
* I.e.
* rqst[0].rq_iov[0] is transform header
* rqst[0].rq_iov[1+] data to be encrypted/decrypted
* rqst[1+].rq_iov[0+] data to be encrypted/decrypted
*/
static struct scatterlist *
init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
{
unsigned int sg_len;
struct scatterlist *sg;
unsigned int i;
unsigned int j;
unsigned int idx = 0;
int skip;
*num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
sg_len = 1;
for (i = 0; i < num_rqst; i++)
sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
len = iv_size;
len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
len = ALIGN(len, crypto_tfm_ctx_alignment());
len += req_size;
len = ALIGN(len, __alignof__(struct scatterlist));
len += *num_sgs * sizeof(**sgl);
sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
if (!sg)
p = kmalloc(len, GFP_ATOMIC);
if (!p)
return NULL;
sg_init_table(sg, sg_len);
*iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
*req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
crypto_tfm_ctx_alignment());
*sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
__alignof__(struct scatterlist));
return p;
}
static void *smb2_get_aead_req(struct crypto_aead *tfm, const struct smb_rqst *rqst,
int num_rqst, const u8 *sig, u8 **iv,
struct aead_request **req, struct scatterlist **sgl)
{
unsigned int off, len, skip;
struct scatterlist *sg;
unsigned int num_sgs;
unsigned long addr;
int i, j;
void *p;
p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, sgl, &num_sgs);
if (!p)
return NULL;
sg_init_table(*sgl, num_sgs);
sg = *sgl;
/* Assumes the first rqst has a transform header as the first iov.
* I.e.
* rqst[0].rq_iov[0] is transform header
* rqst[0].rq_iov[1+] data to be encrypted/decrypted
* rqst[1+].rq_iov[0+] data to be encrypted/decrypted
*/
for (i = 0; i < num_rqst; i++) {
/*
* The first rqst has a transform header where the
* first 20 bytes are not part of the encrypted blob.
*/
for (j = 0; j < rqst[i].rq_nvec; j++) {
/*
* The first rqst has a transform header where the
* first 20 bytes are not part of the encrypted blob
*/
struct kvec *iov = &rqst[i].rq_iov[j];
skip = (i == 0) && (j == 0) ? 20 : 0;
smb2_sg_set_buf(&sg[idx++],
rqst[i].rq_iov[j].iov_base + skip,
rqst[i].rq_iov[j].iov_len - skip);
}
addr = (unsigned long)iov->iov_base + skip;
len = iov->iov_len - skip;
sg = cifs_sg_set_buf(sg, (void *)addr, len);
}
for (j = 0; j < rqst[i].rq_npages; j++) {
unsigned int len, offset;
rqst_page_get_length(&rqst[i], j, &len, &offset);
sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
rqst_page_get_length(&rqst[i], j, &len, &off);
sg_set_page(sg++, rqst[i].rq_pages[j], len, off);
}
}
smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
return sg;
cifs_sg_set_buf(sg, sig, SMB2_SIGNATURE_SIZE);
return p;
}
static int
@ -4314,11 +4327,11 @@ crypt_message(struct TCP_Server_Info *server, int num_rqst,
u8 sign[SMB2_SIGNATURE_SIZE] = {};
u8 key[SMB3_ENC_DEC_KEY_SIZE];
struct aead_request *req;
char *iv;
unsigned int iv_len;
u8 *iv;
DECLARE_CRYPTO_WAIT(wait);
struct crypto_aead *tfm;
unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
void *creq;
rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
if (rc) {
@ -4352,32 +4365,15 @@ crypt_message(struct TCP_Server_Info *server, int num_rqst,
return rc;
}
req = aead_request_alloc(tfm, GFP_KERNEL);
if (!req) {
cifs_server_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg);
if (unlikely(!creq))
return -ENOMEM;
}
if (!enc) {
memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
crypt_len += SMB2_SIGNATURE_SIZE;
}
sg = init_sg(num_rqst, rqst, sign);
if (!sg) {
cifs_server_dbg(VFS, "%s: Failed to init sg\n", __func__);
rc = -ENOMEM;
goto free_req;
}
iv_len = crypto_aead_ivsize(tfm);
iv = kzalloc(iv_len, GFP_KERNEL);
if (!iv) {
cifs_server_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
rc = -ENOMEM;
goto free_sg;
}
if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
(server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
@ -4386,6 +4382,7 @@ crypt_message(struct TCP_Server_Info *server, int num_rqst,
memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
}
aead_request_set_tfm(req, tfm);
aead_request_set_crypt(req, sg, sg, crypt_len, iv);
aead_request_set_ad(req, assoc_data_len);
@ -4398,11 +4395,7 @@ crypt_message(struct TCP_Server_Info *server, int num_rqst,
if (!rc && enc)
memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
kfree_sensitive(iv);
free_sg:
kfree_sensitive(sg);
free_req:
kfree_sensitive(req);
kfree_sensitive(creq);
return rc;
}
@ -4445,21 +4438,27 @@ smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
int rc = -ENOMEM;
for (i = 1; i < num_rqst; i++) {
npages = old_rq[i - 1].rq_npages;
struct smb_rqst *old = &old_rq[i - 1];
struct smb_rqst *new = &new_rq[i];
orig_len += smb_rqst_len(server, old);
new->rq_iov = old->rq_iov;
new->rq_nvec = old->rq_nvec;
npages = old->rq_npages;
if (!npages)
continue;
pages = kmalloc_array(npages, sizeof(struct page *),
GFP_KERNEL);
if (!pages)
goto err_free;
new_rq[i].rq_pages = pages;
new_rq[i].rq_npages = npages;
new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
orig_len += smb_rqst_len(server, &old_rq[i - 1]);
new->rq_pages = pages;
new->rq_npages = npages;
new->rq_offset = old->rq_offset;
new->rq_pagesz = old->rq_pagesz;
new->rq_tailsz = old->rq_tailsz;
for (j = 0; j < npages; j++) {
pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
@ -4472,14 +4471,14 @@ smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
char *dst, *src;
unsigned int offset, len;
rqst_page_get_length(&new_rq[i], j, &len, &offset);
rqst_page_get_length(new, j, &len, &offset);
dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
dst = kmap_local_page(new->rq_pages[j]) + offset;
src = kmap_local_page(old->rq_pages[j]) + offset;
memcpy(dst, src, len);
kunmap(new_rq[i].rq_pages[j]);
kunmap(old_rq[i - 1].rq_pages[j]);
kunmap(new->rq_pages[j]);
kunmap(old->rq_pages[j]);
}
}

5
fs/cifs/smb2proto.h
View File

@ -277,7 +277,10 @@ extern int smb2_query_info_compound(const unsigned int xid,
/* query path info from the server using SMB311 POSIX extensions*/
int smb311_posix_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb, const char *full_path,
struct cifs_open_info_data *data, bool *adjust_tz, bool *reparse);
struct cifs_open_info_data *data,
struct cifs_sid *owner,
struct cifs_sid *group,
bool *adjust_tz, bool *reparse);
int posix_info_parse(const void *beg, const void *end,
struct smb2_posix_info_parsed *out);
int posix_info_sid_size(const void *beg, const void *end);