int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
{
int rc = 0;
int xid, i;
struct cifs_sb_info *cifs_sb;
struct cifsTconInfo *pTcon;
struct cifsFileInfo *cifsFile = NULL;
char *current_entry;
int num_to_fill = 0;
char *tmp_buf = NULL;
char *end_of_smb;
int max_len;
xid = GetXid();
cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
pTcon = cifs_sb->tcon;
if (pTcon == NULL)
return -EINVAL;
switch ((int) file->f_pos) {
case 0:
if (filldir(direntry, ".", 1, file->f_pos,
file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) {
cERROR(1, ("Filldir for current dir failed"));
rc = -ENOMEM;
break;
}
file->f_pos++;
case 1:
if (filldir(direntry, "..", 2, file->f_pos,
file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
cERROR(1, ("Filldir for parent dir failed"));
rc = -ENOMEM;
break;
}
file->f_pos++;
default:
/* 1) If search is active,
is in current search buffer?
if it before then restart search
if after then keep searching till find it */
if (file->private_data == NULL) {
rc = initiate_cifs_search(xid, file);
cFYI(1, ("initiate cifs search rc %d", rc));
if (rc) {
FreeXid(xid);
return rc;
}
}
if (file->private_data == NULL) {
rc = -EINVAL;
FreeXid(xid);
return rc;
}
cifsFile = file->private_data;
if (cifsFile->srch_inf.endOfSearch) {
if (cifsFile->srch_inf.emptyDir) {
cFYI(1, ("End of search, empty dir"));
rc = 0;
break;
}
} /* else {
cifsFile->invalidHandle = true;
CIFSFindClose(xid, pTcon, cifsFile->netfid);
} */
rc = find_cifs_entry(xid, pTcon, file,
¤t_entry, &num_to_fill);
if (rc) {
cFYI(1, ("fce error %d", rc));
goto rddir2_exit;
} else if (current_entry != NULL) {
cFYI(1, ("entry %lld found", file->f_pos));
} else {
cFYI(1, ("could not find entry"));
goto rddir2_exit;
}
cFYI(1, ("loop through %d times filling dir for net buf %p",
num_to_fill, cifsFile->srch_inf.ntwrk_buf_start));
max_len = smbCalcSize((struct smb_hdr *)
cifsFile->srch_inf.ntwrk_buf_start);
end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
/* To be safe - for UCS to UTF-8 with strings loaded
with the rare long characters alloc more to account for
such multibyte target UTF-8 characters. cifs_unicode.c,
which actually does the conversion, has the same limit */
tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL);
for (i = 0; (i < num_to_fill) && (rc == 0); i++) {
if (current_entry == NULL) {
/* evaluate whether this case is an error */
cERROR(1, ("past SMB end, num to fill %d i %d",
num_to_fill, i));
break;
}
/* if buggy server returns . and .. late do
we want to check for that here? */
rc = cifs_filldir(current_entry, file,
filldir, direntry, tmp_buf, max_len);
if (rc == -EOVERFLOW) {
rc = 0;
break;
}
file->f_pos++;
if (file->f_pos ==
cifsFile->srch_inf.index_of_last_entry) {
cFYI(1, ("last entry in buf at pos %lld %s",
file->f_pos, tmp_buf));
cifs_save_resume_key(current_entry, cifsFile);
break;
} else
current_entry =
nxt_dir_entry(current_entry, end_of_smb,
cifsFile->srch_inf.info_level);
}
kfree(tmp_buf);
break;
} /* end switch */
rddir2_exit:
FreeXid(xid);
return rc;
}
int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
{
int rc = 0;
int xid, i;
struct cifs_tcon *pTcon;
struct cifsFileInfo *cifsFile = NULL;
char *current_entry;
int num_to_fill = 0;
char *tmp_buf = NULL;
char *end_of_smb;
unsigned int max_len;
xid = GetXid();
/*
* Ensure FindFirst doesn't fail before doing filldir() for '.' and
* '..'. Otherwise we won't be able to notify VFS in case of failure.
*/
if (file->private_data == NULL) {
rc = initiate_cifs_search(xid, file);
cFYI(1, "initiate cifs search rc %d", rc);
if (rc)
goto rddir2_exit;
}
switch ((int) file->f_pos) {
case 0:
if (filldir(direntry, ".", 1, file->f_pos,
file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) {
cERROR(1, "Filldir for current dir failed");
rc = -ENOMEM;
break;
}
file->f_pos++;
case 1:
if (filldir(direntry, "..", 2, file->f_pos,
parent_ino(file->f_path.dentry), DT_DIR) < 0) {
cERROR(1, "Filldir for parent dir failed");
rc = -ENOMEM;
break;
}
file->f_pos++;
default:
/* 1) If search is active,
is in current search buffer?
if it before then restart search
if after then keep searching till find it */
if (file->private_data == NULL) {
rc = -EINVAL;
FreeXid(xid);
return rc;
}
cifsFile = file->private_data;
if (cifsFile->srch_inf.endOfSearch) {
if (cifsFile->srch_inf.emptyDir) {
cFYI(1, "End of search, empty dir");
rc = 0;
break;
}
} /* else {
cifsFile->invalidHandle = true;
CIFSFindClose(xid, pTcon, cifsFile->netfid);
} */
pTcon = tlink_tcon(cifsFile->tlink);
rc = find_cifs_entry(xid, pTcon, file,
¤t_entry, &num_to_fill);
if (rc) {
cFYI(1, "fce error %d", rc);
goto rddir2_exit;
} else if (current_entry != NULL) {
cFYI(1, "entry %lld found", file->f_pos);
} else {
cFYI(1, "could not find entry");
goto rddir2_exit;
}
cFYI(1, "loop through %d times filling dir for net buf %p",
num_to_fill, cifsFile->srch_inf.ntwrk_buf_start);
max_len = smbCalcSize((struct smb_hdr *)
cifsFile->srch_inf.ntwrk_buf_start);
end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL);
if (tmp_buf == NULL) {
rc = -ENOMEM;
break;
}
for (i = 0; (i < num_to_fill) && (rc == 0); i++) {
if (current_entry == NULL) {
/* evaluate whether this case is an error */
cERROR(1, "past SMB end, num to fill %d i %d",
num_to_fill, i);
break;
}
/* if buggy server returns . and .. late do
we want to check for that here? */
rc = cifs_filldir(current_entry, file,
filldir, direntry, tmp_buf, max_len);
if (rc == -EOVERFLOW) {
rc = 0;
break;
}
file->f_pos++;
if (file->f_pos ==
cifsFile->srch_inf.index_of_last_entry) {
cFYI(1, "last entry in buf at pos %lld %s",
file->f_pos, tmp_buf);
cifs_save_resume_key(current_entry, cifsFile);
break;
} else
current_entry =
nxt_dir_entry(current_entry, end_of_smb,
cifsFile->srch_inf.info_level);
}
kfree(tmp_buf);
break;
} /* end switch */
rddir2_exit:
FreeXid(xid);
return rc;
}
int cifs_readdir(struct file *file, struct dir_context *ctx)
{
int rc = 0;
unsigned int xid;
int i;
struct cifs_tcon *tcon;
struct cifsFileInfo *cifsFile = NULL;
char *current_entry;
int num_to_fill = 0;
char *tmp_buf = NULL;
char *end_of_smb;
unsigned int max_len;
xid = get_xid();
/*
* Ensure FindFirst doesn't fail before doing filldir() for '.' and
* '..'. Otherwise we won't be able to notify VFS in case of failure.
*/
if (file->private_data == NULL) {
rc = initiate_cifs_search(xid, file);
cifs_dbg(FYI, "initiate cifs search rc %d\n", rc);
if (rc)
goto rddir2_exit;
}
if (!dir_emit_dots(file, ctx))
goto rddir2_exit;
/* 1) If search is active,
is in current search buffer?
if it before then restart search
if after then keep searching till find it */
cifsFile = file->private_data;
if (cifsFile->srch_inf.endOfSearch) {
if (cifsFile->srch_inf.emptyDir) {
cifs_dbg(FYI, "End of search, empty dir\n");
rc = 0;
goto rddir2_exit;
}
} /* else {
cifsFile->invalidHandle = true;
tcon->ses->server->close(xid, tcon, &cifsFile->fid);
} */
tcon = tlink_tcon(cifsFile->tlink);
rc = find_cifs_entry(xid, tcon, ctx->pos, file, ¤t_entry,
&num_to_fill);
if (rc) {
cifs_dbg(FYI, "fce error %d\n", rc);
goto rddir2_exit;
} else if (current_entry != NULL) {
cifs_dbg(FYI, "entry %lld found\n", ctx->pos);
} else {
cifs_dbg(FYI, "could not find entry\n");
goto rddir2_exit;
}
cifs_dbg(FYI, "loop through %d times filling dir for net buf %p\n",
num_to_fill, cifsFile->srch_inf.ntwrk_buf_start);
max_len = tcon->ses->server->ops->calc_smb_size(
cifsFile->srch_inf.ntwrk_buf_start);
end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL);
if (tmp_buf == NULL) {
rc = -ENOMEM;
goto rddir2_exit;
}
for (i = 0; i < num_to_fill; i++) {
if (current_entry == NULL) {
/* evaluate whether this case is an error */
cifs_dbg(VFS, "past SMB end, num to fill %d i %d\n",
num_to_fill, i);
break;
}
/*
* if buggy server returns . and .. late do we want to
* check for that here?
*/
*tmp_buf = 0;
rc = cifs_filldir(current_entry, file, ctx,
tmp_buf, max_len);
if (rc) {
if (rc > 0)
rc = 0;
break;
}
ctx->pos++;
if (ctx->pos ==
cifsFile->srch_inf.index_of_last_entry) {
cifs_dbg(FYI, "last entry in buf at pos %lld %s\n",
ctx->pos, tmp_buf);
cifs_save_resume_key(current_entry, cifsFile);
break;
} else
current_entry =
nxt_dir_entry(current_entry, end_of_smb,
cifsFile->srch_inf.info_level);
}
kfree(tmp_buf);
rddir2_exit:
free_xid(xid);
return rc;
}
int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
{
int rc = 0;
int xid, i;
struct cifs_tcon *pTcon;
struct cifsFileInfo *cifsFile = NULL;
char *current_entry;
int num_to_fill = 0;
char *tmp_buf = NULL;
char *end_of_smb;
unsigned int max_len;
xid = GetXid();
if (file->private_data == NULL) {
rc = initiate_cifs_search(xid, file);
cFYI(1, "initiate cifs search rc %d", rc);
if (rc)
goto rddir2_exit;
}
switch ((int) file->f_pos) {
case 0:
if (filldir(direntry, ".", 1, file->f_pos,
file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) {
cERROR(1, "Filldir for current dir failed");
rc = -ENOMEM;
break;
}
file->f_pos++;
case 1:
if (filldir(direntry, "..", 2, file->f_pos,
parent_ino(file->f_path.dentry), DT_DIR) < 0) {
cERROR(1, "Filldir for parent dir failed");
rc = -ENOMEM;
break;
}
file->f_pos++;
default:
if (file->private_data == NULL) {
rc = -EINVAL;
FreeXid(xid);
return rc;
}
cifsFile = file->private_data;
if (cifsFile->srch_inf.endOfSearch) {
if (cifsFile->srch_inf.emptyDir) {
cFYI(1, "End of search, empty dir");
rc = 0;
break;
}
}
pTcon = tlink_tcon(cifsFile->tlink);
rc = find_cifs_entry(xid, pTcon, file,
¤t_entry, &num_to_fill);
if (rc) {
cFYI(1, "fce error %d", rc);
goto rddir2_exit;
} else if (current_entry != NULL) {
cFYI(1, "entry %lld found", file->f_pos);
} else {
cFYI(1, "could not find entry");
goto rddir2_exit;
}
cFYI(1, "loop through %d times filling dir for net buf %p",
num_to_fill, cifsFile->srch_inf.ntwrk_buf_start);
max_len = smbCalcSize((struct smb_hdr *)
cifsFile->srch_inf.ntwrk_buf_start);
end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL);
if (tmp_buf == NULL) {
rc = -ENOMEM;
break;
}
for (i = 0; (i < num_to_fill) && (rc == 0); i++) {
if (current_entry == NULL) {
cERROR(1, "past SMB end, num to fill %d i %d",
num_to_fill, i);
break;
}
rc = cifs_filldir(current_entry, file,
filldir, direntry, tmp_buf, max_len);
if (rc == -EOVERFLOW) {
rc = 0;
break;
}
file->f_pos++;
if (file->f_pos ==
cifsFile->srch_inf.index_of_last_entry) {
cFYI(1, "last entry in buf at pos %lld %s",
file->f_pos, tmp_buf);
cifs_save_resume_key(current_entry, cifsFile);
break;
} else
current_entry =
nxt_dir_entry(current_entry, end_of_smb,
cifsFile->srch_inf.info_level);
}
kfree(tmp_buf);
break;
}
rddir2_exit:
FreeXid(xid);
return rc;
}