/*
* This function adds an entry in the database
*/
fsal_status_t fsal_internal_posixdb_add_entry(fsal_posixdb_conn * p_conn,
fsal_name_t * p_filename,
fsal_posixdb_fileinfo_t * p_info,
posixfsal_handle_t * p_dir_handle,
posixfsal_handle_t * p_new_handle)
{
fsal_posixdb_status_t stdb;
if(!p_info || !p_conn || !p_new_handle) /* p_filename & p_dir_handle can be NULL for the root */
ReturnCode(ERR_FSAL_FAULT, 0);
add:
stdb = fsal_posixdb_add(p_conn, p_info, p_dir_handle, p_filename, p_new_handle);
if(stdb.major == ERR_FSAL_POSIXDB_CONSISTENCY)
{ /* there is already an entry with this path, but it's an inconsistent one */
stdb = fsal_posixdb_deleteHandle(p_conn, p_new_handle);
if(FSAL_POSIXDB_IS_ERROR(stdb))
return posixdb2fsal_error(stdb);
goto add;
}
else if(FSAL_POSIXDB_IS_ERROR(stdb))
{
return posixdb2fsal_error(stdb);
}
ReturnCode(ERR_FSAL_NO_ERROR, 0);
}
/**
* @brief Get the handle of a file, knowing its name and its parent dir
*
* @param p_context
* @param p_parent_dir_handle
* Handle of the parent directory
* @param p_fsalname
* Name of the object
* @param p_infofs
* Information about the file (taken from the filesystem) to be compared to information stored in database
* @param p_object_handle
* Handle of the file.
*
* @return
* ERR_FSAL_NOERR, if no error
* Anothere error code else.
*/
fsal_status_t fsal_internal_getInfoFromName(posixfsal_op_context_t * p_context, /* IN */
posixfsal_handle_t * p_parent_dir_handle, /* IN */
fsal_name_t * p_fsalname, /* IN */
fsal_posixdb_fileinfo_t * p_infofs, /* IN */
posixfsal_handle_t * p_object_handle) /* OUT */
{
fsal_posixdb_status_t stdb;
fsal_status_t st;
stdb = fsal_posixdb_getInfoFromName(p_context->p_conn,
p_parent_dir_handle,
p_fsalname, NULL, p_object_handle);
switch (stdb.major)
{
case ERR_FSAL_POSIXDB_NOERR:
/* No error, the object is in the database */
/* check consistency */
if(fsal_posixdb_consistency_check(&(p_object_handle->data.info), p_infofs))
{
/* Entry not consistent */
/* Delete the Handle entry, then add a new one (with a Parent entry) */
stdb = fsal_posixdb_deleteHandle(p_context->p_conn, p_object_handle);
if(FSAL_POSIXDB_IS_ERROR(stdb) && FSAL_IS_ERROR(st = posixdb2fsal_error(stdb)))
return st;
/* don't break, add a new entry */
}
else
{
break;
}
case ERR_FSAL_POSIXDB_NOENT:
/* object not in the database, add a new entry */
st = fsal_internal_posixdb_add_entry(p_context->p_conn,
p_fsalname,
p_infofs,
p_parent_dir_handle, p_object_handle);
if(FSAL_IS_ERROR(st))
return st;
break;
default:
/* error */
if(FSAL_IS_ERROR(st = posixdb2fsal_error(stdb)))
return st;
}
ReturnCode(ERR_FSAL_NO_ERROR, 0);
}
/**
* FSAL_readdir :
* Read the entries of an opened directory.
*
* \param dir_descriptor (input):
* Pointer to the directory descriptor filled by FSAL_opendir.
* \param start_position (input):
* Cookie that indicates the first object to be read during
* this readdir operation.
* This should be :
* - FSAL_READDIR_FROM_BEGINNING for reading the content
* of the directory from the beginning.
* - The end_position parameter returned by the previous
* call to FSAL_readdir.
* \param get_attr_mask (input)
* Specify the set of attributes to be retrieved for directory entries.
* \param buffersize (input)
* The size (in bytes) of the buffer where
* the direntries are to be stored.
* \param pdirent (output)
* Adresse of the buffer where the direntries are to be stored.
* \param end_position (output)
* Cookie that indicates the current position in the directory.
* \param nb_entries (output)
* Pointer to the number of entries read during the call.
* \param end_of_dir (output)
* Pointer to a boolean that indicates if the end of dir
* has been reached during the call.
*
* \return Major error codes :
* - ERR_FSAL_NO_ERROR (no error)
* - Another error code if an error occured.
*/
fsal_status_t POSIXFSAL_readdir(fsal_dir_t * dir_descriptor, /* IN */
fsal_cookie_t start_pos, /* IN */
fsal_attrib_mask_t get_attr_mask, /* IN */
fsal_mdsize_t buffersize, /* IN */
fsal_dirent_t * p_pdirent, /* OUT */
fsal_cookie_t * end_position, /* OUT */
fsal_count_t * p_nb_entries, /* OUT */
fsal_boolean_t * p_end_of_dir /* OUT */
)
{
posixfsal_dir_t * p_dir_descriptor = (posixfsal_dir_t *) dir_descriptor;
posixfsal_cookie_t start_position, telldir_pos;
posixfsal_cookie_t * p_end_position = (posixfsal_cookie_t *) end_position;
fsal_status_t st;
fsal_posixdb_status_t stdb;
fsal_count_t max_dir_entries;
struct dirent *dp;
struct dirent dpe;
struct stat buffstat;
fsal_path_t fsalpath;
fsal_posixdb_fileinfo_t infofs;
int rc;
/*****************/
/* sanity checks */
/*****************/
if(!p_dir_descriptor || !p_pdirent || !p_end_position || !p_nb_entries || !p_end_of_dir)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_readdir);
max_dir_entries = (buffersize / sizeof(fsal_dirent_t));
/***************************/
/* seek into the directory */
/***************************/
memcpy ( (char *)&start_position.data.cookie, (char *)&start_pos.data, sizeof( off_t ) ) ;
errno = 0;
if(start_position.data.cookie == 0)
{
rewinddir(p_dir_descriptor->p_dir);
rc = errno;
}
else
{
seekdir(p_dir_descriptor->p_dir, start_position.data.cookie);
rc = errno;
}
if(rc)
{
st.major = posix2fsal_error(rc);
st.minor = rc;
goto readdir_error;
}
/************************/
/* browse the directory */
/************************/
*p_nb_entries = 0;
while(*p_nb_entries < max_dir_entries)
{
/***********************/
/* read the next entry */
/***********************/
TakeTokenFSCall();
rc = readdir_r(p_dir_descriptor->p_dir, &dpe, &dp);
ReleaseTokenFSCall();
if(rc)
{
st.major = posix2fsal_error(errno);
st.minor = errno;
goto readdir_error;
} /* End of directory */
if(!dp)
{
*p_end_of_dir = 1;
break;
}
/***********************************/
/* Get information about the entry */
/***********************************/
/* build the full path of the file into "fsalpath */
if(FSAL_IS_ERROR
(st =
FSAL_str2name(dp->d_name, FSAL_MAX_NAME_LEN, &(p_pdirent[*p_nb_entries].name))))
goto readdir_error;
memcpy(&fsalpath, &(p_dir_descriptor->path), sizeof(fsal_path_t));
st = fsal_internal_appendFSALNameToFSALPath(&fsalpath,
&(p_pdirent[*p_nb_entries].name));
if(FSAL_IS_ERROR(st))
goto readdir_error;
/* get object info */
TakeTokenFSCall();
rc = lstat(fsalpath.path, &buffstat);
ReleaseTokenFSCall();
if(rc)
{
st.major = posix2fsal_error(errno);
st.minor = errno;
goto readdir_error;
}
if(FSAL_IS_ERROR(st = fsal_internal_posix2posixdb_fileinfo(&buffstat, &infofs)))
goto readdir_error;
/********************/
/* fills the handle */
/********************/
/* check for "." and ".." */
if(!strcmp(dp->d_name, "."))
{
memcpy(&(p_pdirent[*p_nb_entries].handle), &(p_dir_descriptor->handle),
sizeof(posixfsal_handle_t));
}
else if(!strcmp(dp->d_name, ".."))
{
stdb = fsal_posixdb_getParentDirHandle(p_dir_descriptor->context.p_conn,
&(p_dir_descriptor->handle),
(posixfsal_handle_t *) &(p_pdirent[*p_nb_entries].handle));
if(FSAL_POSIXDB_IS_ERROR(stdb) && FSAL_IS_ERROR(st = posixdb2fsal_error(stdb)))
goto readdir_error;
}
else
{
#ifdef _USE_POSIXDB_READDIR_BLOCK
if(p_dir_descriptor->dbentries_count > -1)
{ /* look for the entry in dbentries */
st = fsal_internal_getInfoFromChildrenList(&(p_dir_descriptor->context),
&(p_dir_descriptor->handle),
&(p_pdirent[*p_nb_entries].name),
&infofs,
p_dir_descriptor->p_dbentries,
p_dir_descriptor->
dbentries_count,
&(p_pdirent[*p_nb_entries].
handle));
}
else
#endif
{ /* get handle for the entry */
st = fsal_internal_getInfoFromName(&(p_dir_descriptor->context),
&(p_dir_descriptor->handle),
&(p_pdirent[*p_nb_entries].name),
&infofs,
(posixfsal_handle_t *) &(p_pdirent[*p_nb_entries].handle));
}
if(FSAL_IS_ERROR(st))
goto readdir_error;
} /* end of name check for "." and ".." */
/************************
* Fills the attributes *
************************/
p_pdirent[*p_nb_entries].attributes.asked_attributes = get_attr_mask;
st = posix2fsal_attributes(&buffstat, &(p_pdirent[*p_nb_entries].attributes));
if(FSAL_IS_ERROR(st))
goto readdir_error;
/*
*
**/
telldir_pos.data.cookie = telldir(p_dir_descriptor->p_dir);
memcpy(&p_pdirent[*p_nb_entries].cookie, &telldir_pos, sizeof(fsal_cookie_t));
p_pdirent[*p_nb_entries].nextentry = NULL;
if(*p_nb_entries)
p_pdirent[*p_nb_entries - 1].nextentry = &(p_pdirent[*p_nb_entries]);
memcpy(p_end_position, &p_pdirent[*p_nb_entries].cookie, sizeof(fsal_cookie_t));
(*p_nb_entries)++;
};
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_readdir);
/* return error, and free what must be freed */
readdir_error:
Return(st.major, st.minor, INDEX_FSAL_readdir);
}
/**
* @brief Get the handle of a file from a fsal_posixdb_child array, knowing its name
*
* @param p_context
* @param p_parent_dir_handle
* Handle of the parent directory
* @param p_fsalname
* Name of the object
* @param p_infofs
* Information about the file (taken from the filesystem) to be compared to information stored in database
* @param p_children
* fsal_posixdb_child array (that contains the entries of the directory stored in the db)
* @param p_object_handle
* Handle of the file.
*
* @return
* ERR_FSAL_NOERR, if no error
* Anothere error code else.
*/
fsal_status_t fsal_internal_getInfoFromChildrenList(posixfsal_op_context_t * p_context, /* IN */
posixfsal_handle_t * p_parent_dir_handle, /* IN */
fsal_name_t * p_fsalname, /* IN */
fsal_posixdb_fileinfo_t * p_infofs, /* IN */
fsal_posixdb_child * p_children, /* IN */
unsigned int children_count, /* IN */
posixfsal_handle_t * p_object_handle) /* OUT */
{
fsal_posixdb_status_t stdb;
fsal_status_t st;
int cmp = -1; /* when no children is available */
unsigned int count;
/* sanity check */
if(!p_context || !p_parent_dir_handle || !p_fsalname || (!p_children && children_count)
|| !p_object_handle)
ReturnCode(ERR_FSAL_FAULT, 0);
/* check if the filename is in the list */
for(count = 0; count < children_count; count++)
{
cmp = FSAL_namecmp(p_fsalname, &(p_children[count].name));
if(!cmp)
break;
/* maybe a sorted list could give better result */
}
switch (cmp)
{
case 0:
/* Entry found : check consistency */
if(fsal_posixdb_consistency_check(&(p_children[count].handle.data.info), p_infofs))
{
/* Entry not consistent */
/* Delete the Handle entry, then add a new one (with a Parent entry) */
stdb =
fsal_posixdb_deleteHandle(p_context->p_conn, &(p_children[count].handle));
if(FSAL_POSIXDB_IS_ERROR(stdb) && FSAL_IS_ERROR(st = posixdb2fsal_error(stdb)))
return st;
/* don't break, add a new entry */
}
else
{
memcpy(p_object_handle, &(p_children[count].handle),
sizeof(posixfsal_handle_t));
break;
}
default:
/* not found ! Add it */
st = fsal_internal_posixdb_add_entry(p_context->p_conn,
p_fsalname,
p_infofs,
p_parent_dir_handle, p_object_handle);
if(FSAL_IS_ERROR(st))
return st;
}
ReturnCode(ERR_FSAL_NO_ERROR, 0);
}
/**
* Get a valid path associated to an handle.
* The function selects many paths from the DB and return the first valid one. If is_dir is set, then only 1 path will be constructed from the database.
*/
fsal_status_t fsal_internal_getPathFromHandle(posixfsal_op_context_t * p_context, /* IN */
posixfsal_handle_t * p_handle, /* IN */
int is_dir, /* IN */
fsal_path_t * p_fsalpath, /* OUT */
struct stat *p_buffstat /* OUT */ )
{
fsal_status_t status;
fsal_posixdb_status_t statusdb;
int rc, errsv, count, i;
fsal_posixdb_fileinfo_t infofs;
fsal_path_t paths[global_fs_info.maxlink];
if(!p_context || !p_handle || !p_fsalpath)
ReturnCode(ERR_FSAL_FAULT, 0);
/* if there is a path in the posixfsal_handle_t variable, then try to use it instead of querying the database for it */
/* Read the path from the Handle. If it's valid & coherent, then no need to query the database ! */
/* if !p_buffstat, we don't need to check the path */
statusdb = fsal_posixdb_getInfoFromHandle(p_context->p_conn,
p_handle,
paths,
(is_dir ? 1 : global_fs_info.maxlink),
&count);
if(FSAL_POSIXDB_IS_ERROR(statusdb)
&& FSAL_IS_ERROR(status = posixdb2fsal_error(statusdb)))
return status;
/* if !p_buffstat, then we do not stat the path to test if file is valid */
if(p_buffstat)
{
for(i = 0; i < count; i++)
{
TakeTokenFSCall();
rc = lstat(paths[i].path, p_buffstat);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
/* error : delete the bad path from the database */
char dirc[FSAL_MAX_PATH_LEN];
char basec[FSAL_MAX_PATH_LEN];
fsal_path_t parentdir;
fsal_name_t filename;
posixfsal_handle_t parenthdl;
char *dname, *bname;
/* split /path/to/filename in /path/to & filename */
strncpy(dirc, paths[i].path, FSAL_MAX_PATH_LEN);
strncpy(basec, paths[i].path, FSAL_MAX_PATH_LEN);
dname = dirname(dirc);
bname = basename(basec);
status = FSAL_str2path(dname, FSAL_MAX_PATH_LEN, &parentdir);
status = FSAL_str2name(bname, FSAL_MAX_NAME_LEN, &filename);
/* get the handle of /path/to */
status = POSIXFSAL_lookupPath(&parentdir, p_context, &parenthdl, NULL);
if(!FSAL_IS_ERROR(status))
{
statusdb =
fsal_posixdb_delete(p_context->p_conn, &parenthdl, &filename, NULL);
/* no need to check if there was an error, because it doesn't change the behavior of the function */
}
}
else
{ /* no error */
FSAL_pathcpy(p_fsalpath, &(paths[0]));
break;
}
}
if(i == count)
ReturnCode(ERR_FSAL_STALE, 0);
/* check consistency */
status = fsal_internal_posix2posixdb_fileinfo(p_buffstat, &infofs);
if(FSAL_IS_ERROR(status))
return status;
if(fsal_posixdb_consistency_check(&(p_handle->data.info), &infofs))
{
/* not consistent !! */
/* delete the stale handle */
statusdb = fsal_posixdb_deleteHandle(p_context->p_conn, p_handle);
if(FSAL_POSIXDB_IS_ERROR(statusdb)
&& FSAL_IS_ERROR(status = posixdb2fsal_error(statusdb)))
return status;
ReturnCode(ERR_FSAL_STALE, 0);
}
}
else
{
/* @TODO : check that there si at liste 1 path */
FSAL_pathcpy(p_fsalpath, &(paths[0]));
}
ReturnCode(ERR_FSAL_NO_ERROR, 0);
}
