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cifs: Parse owner/group for stat in smb311 posix extensions 

stat was returning default owner and group (unlike readdir)
for SMB3.1.1 POSIX extensions

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Volker Lendecke 2022-11-25 12:37:44 +01:00 committed by Steve French
parent 83fb8abec2
commit 64ce47cb1b
3 changed files with 59 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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 */

49
fs/cifs/smb2inode.c
View File

@ -431,6 +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)
@ -569,13 +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;
@ -590,7 +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,
NULL, NULL, 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 &&
@ -607,10 +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, 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);

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);