fsal_status_t WRAP_FUSEFSAL_getattrs(fsal_handle_t * p_filehandle, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_attrib_list_t *
p_object_attributes /* IN/OUT */ )
{
return FUSEFSAL_getattrs((fusefsal_handle_t *) p_filehandle,
(fusefsal_op_context_t *) p_context, p_object_attributes);
}
fsal_status_t FUSEFSAL_truncate(fsal_handle_t *handle, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_size_t length, /* IN */
fsal_file_t * file_descriptor, /* Unused in this FSAL */
fsal_attrib_list_t * object_attributes /* [ IN/OUT ] */
)
{
int rc;
char object_path[FSAL_MAX_PATH_LEN];
fusefsal_handle_t * filehandle = (fusefsal_handle_t *)handle;
/* sanity checks.
* note : object_attributes is optional.
*/
if(!filehandle || !p_context)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_truncate);
if(!p_fs_ops->truncate)
Return(ERR_FSAL_NOTSUPP, 0, INDEX_FSAL_truncate);
/* get the full path for the object */
rc = NamespacePath(filehandle->data.inode, filehandle->data.device, filehandle->data.validator,
object_path);
if(rc)
Return(ERR_FSAL_STALE, rc, INDEX_FSAL_truncate);
/* set context for the next operation, so it can be retrieved by FS thread */
fsal_set_thread_context(p_context);
TakeTokenFSCall();
rc = p_fs_ops->truncate(object_path, (off_t) length);
ReleaseTokenFSCall();
if(rc)
Return(fuse2fsal_error(rc, TRUE), rc, INDEX_FSAL_truncate);
if(object_attributes)
{
fsal_status_t st;
st = FUSEFSAL_getattrs(handle, p_context, object_attributes);
if(FSAL_IS_ERROR(st))
{
FSAL_CLEAR_MASK(object_attributes->asked_attributes);
FSAL_SET_MASK(object_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
/* No error occured */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_truncate);
}
/**
* FSAL_open:
* Open a regular file for reading/writing its data content.
*
* \param filehandle (input):
* Handle of the file to be read/modified.
* \param cred (input):
* Authentication context for the operation (user,...).
* \param openflags (input):
* Flags that indicates behavior for file opening and access.
* This is an inclusive OR of the following values
* ( such of them are not compatible) :
* - FSAL_O_RDONLY: opening file for reading only.
* - FSAL_O_RDWR: opening file for reading and writing.
* - FSAL_O_WRONLY: opening file for writting only.
* - FSAL_O_APPEND: always write at the end of the file.
* - FSAL_O_TRUNC: truncate the file to 0 on opening.
* \param file_descriptor (output):
* The file descriptor to be used for FSAL_read/write operations.
* \param file_attributes (optionnal input/output):
* Post operation attributes.
* As input, it defines the attributes that the caller
* wants to retrieve (by positioning flags into this structure)
* and the output is built considering this input
* (it fills the structure according to the flags it contains).
*
* \return Major error codes:
* - ERR_FSAL_NO_ERROR (no error)
* - ERR_FSAL_ACCESS (user doesn't have the permissions for opening the file)
* - ERR_FSAL_STALE (filehandle does not address an existing object)
* - ERR_FSAL_INVAL (filehandle does not address a regular file,
* or open flags are conflicting)
* - ERR_FSAL_FAULT (a NULL pointer was passed as mandatory argument)
* - Other error codes can be returned :
* ERR_FSAL_IO, ...
*/
fsal_status_t FUSEFSAL_open(fsal_handle_t * file_hdl, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_openflags_t openflags, /* IN */
fsal_file_t * file_desc, /* OUT */
fsal_attrib_list_t * file_attributes /* [ IN/OUT ] */
)
{
int rc = 0;
char object_path[FSAL_MAX_PATH_LEN];
int file_info_provided = FALSE;
fusefsal_handle_t * filehandle = (fusefsal_handle_t *)file_hdl;
fusefsal_file_t * file_descriptor = (fusefsal_file_t *)file_desc;
/* sanity checks.
* note : file_attributes is optional.
*/
if(!filehandle || !p_context || !file_descriptor)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_open);
/* get the full path for this file */
rc = NamespacePath(filehandle->data.inode, filehandle->data.device, filehandle->data.validator,
object_path);
if(rc)
Return(ERR_FSAL_STALE, rc, INDEX_FSAL_open);
memset(file_descriptor, 0, sizeof(fusefsal_file_t));
/* set access mode flags */
file_descriptor->file_info.flags = 0;
if(openflags & FSAL_O_RDONLY)
file_descriptor->file_info.flags |= O_RDONLY;
if(openflags & FSAL_O_WRONLY)
file_descriptor->file_info.flags |= O_WRONLY;
if(openflags & FSAL_O_RDWR)
file_descriptor->file_info.flags |= O_RDWR;
/* set context for the next operation, so it can be retrieved by FS thread */
fsal_set_thread_context(p_context);
/* check open call */
if(p_fs_ops->open)
{
LogFullDebug(COMPONENT_FSAL, "Call to open( %s, %#X )", object_path, file_descriptor->file_info.flags);
TakeTokenFSCall();
rc = p_fs_ops->open(object_path, &(file_descriptor->file_info));
ReleaseTokenFSCall();
if(rc)
Return(fuse2fsal_error(rc, TRUE), rc, INDEX_FSAL_open);
file_info_provided = TRUE;
}
else
{
LogFullDebug(COMPONENT_FSAL, "no open command provided");
/* ignoring open */
memset(&(file_descriptor->file_info), 0, sizeof(struct ganefuse_file_info));
}
/* check open flags (only FSAL_O_TRUNC and FSAL_O_APPEND are used for FUSE filesystems) */
if(openflags & FSAL_O_TRUNC)
{
if(file_info_provided && p_fs_ops->ftruncate)
{
LogFullDebug(COMPONENT_FSAL, "call to ftruncate on file since FSAL_O_TRUNC was set");
/* ftruncate the file */
TakeTokenFSCall();
rc = p_fs_ops->ftruncate(object_path, 0, &(file_descriptor->file_info));
ReleaseTokenFSCall();
if(rc)
Return(fuse2fsal_error(rc, TRUE), rc, INDEX_FSAL_open);
}
else if(p_fs_ops->truncate)
{
LogFullDebug(COMPONENT_FSAL, "call to truncate on file since FSAL_O_TRUNC was set");
/* truncate the file */
TakeTokenFSCall();
rc = p_fs_ops->truncate(object_path, 0);
ReleaseTokenFSCall();
if(rc)
Return(fuse2fsal_error(rc, TRUE), rc, INDEX_FSAL_open);
}
/* else: ignoring flag */
}
if(openflags & FSAL_O_APPEND)
{
struct stat stbuf;
/* In this case, this only solution is to get file attributes */
if(file_info_provided && p_fs_ops->fgetattr)
{
rc = p_fs_ops->fgetattr(object_path, &stbuf, &(file_descriptor->file_info));
}
else
{
rc = p_fs_ops->getattr(object_path, &stbuf);
}
if(rc)
Return(fuse2fsal_error(rc, TRUE), rc, INDEX_FSAL_open);
file_descriptor->current_offset = stbuf.st_size;
}
else
{
file_descriptor->current_offset = 0;
}
/* fill the file descriptor structure */
file_descriptor->file_handle = *filehandle;
/* backup context */
file_descriptor->context = *(fusefsal_op_context_t *)p_context;
if(file_info_provided)
LogFullDebug(COMPONENT_FSAL, "FSAL_open: FH=%"PRId64, file_descriptor->file_info.fh);
if(file_attributes)
{
fsal_status_t status;
status = FUSEFSAL_getattrs((fsal_handle_t *)filehandle, p_context, file_attributes);
/* on error, we set a special bit in the mask. */
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(file_attributes->asked_attributes);
FSAL_SET_MASK(file_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_open);
}
/**
* FSAL_opendir :
* Opens a directory for reading its content.
*
* \param dir_handle (input)
* the handle of the directory to be opened.
* \param p_context (input)
* Permission context for the operation (user, export context...).
* \param dir_descriptor (output)
* pointer to an allocated structure that will receive
* directory stream informations, on successfull completion.
* \param dir_attributes (optional output)
* On successfull completion,the structure pointed
* by dir_attributes receives the new directory attributes.
* Can be NULL.
*
* \return Major error codes :
* - ERR_FSAL_NO_ERROR (no error)
* - ERR_FSAL_ACCESS (user does not have read permission on directory)
* - ERR_FSAL_STALE (dir_handle does not address an existing object)
* - ERR_FSAL_FAULT (a NULL pointer was passed as mandatory argument)
* - Other error codes can be returned :
* ERR_FSAL_IO, ...
*/
fsal_status_t FUSEFSAL_opendir(fsal_handle_t * dir_hdl, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_dir_t * dir_desc, /* OUT */
fsal_attrib_list_t * dir_attributes /* [ IN/OUT ] */
)
{
int rc;
char object_path[FSAL_MAX_PATH_LEN];
fusefsal_dir_t * dir_descriptor = (fusefsal_dir_t *)dir_desc;
fusefsal_handle_t * dir_handle = (fusefsal_handle_t *)dir_hdl;
/* sanity checks
* note : dir_attributes is optionnal.
*/
if(!dir_handle || !p_context || !dir_descriptor)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_opendir);
/* get the full path for this directory */
rc = NamespacePath(dir_handle->data.inode, dir_handle->data.device, dir_handle->data.validator,
object_path);
if(rc)
Return(ERR_FSAL_STALE, rc, INDEX_FSAL_opendir);
memset(dir_descriptor, 0, sizeof(fsal_dir_t));
/* set context for the next operation, so it can be retrieved by FS thread */
fsal_set_thread_context(p_context);
/* check opendir call */
if(p_fs_ops->opendir)
{
TakeTokenFSCall();
rc = p_fs_ops->opendir(object_path, &(dir_descriptor->dir_info));
ReleaseTokenFSCall();
if(rc)
Return(fuse2fsal_error(rc, TRUE), rc, INDEX_FSAL_opendir);
}
else
{
/* ignoring opendir */
memset(&(dir_descriptor->dir_info), 0, sizeof(struct ganefuse_file_info));
}
/* fill the dir descriptor structure */
dir_descriptor->dir_handle = *dir_handle;
/* backup context */
dir_descriptor->context = *(fusefsal_op_context_t *)p_context;
/* optionaly get attributes */
if(dir_attributes)
{
fsal_status_t status;
status = FUSEFSAL_getattrs(dir_hdl, p_context, dir_attributes);
/* on error, we set a special bit in the mask. */
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(dir_attributes->asked_attributes);
FSAL_SET_MASK(dir_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_opendir);
}
fsal_status_t FUSEFSAL_rename(fusefsal_handle_t * old_parentdir_handle, /* IN */
fsal_name_t * p_old_name, /* IN */
fusefsal_handle_t * new_parentdir_handle, /* IN */
fsal_name_t * p_new_name, /* IN */
fusefsal_op_context_t * p_context, /* IN */
fsal_attrib_list_t * src_dir_attributes, /* [ IN/OUT ] */
fsal_attrib_list_t * tgt_dir_attributes /* [ IN/OUT ] */
)
{
int rc = 0;
char src_dir_path[FSAL_MAX_PATH_LEN];
char tgt_dir_path[FSAL_MAX_PATH_LEN];
char src_obj_path[FSAL_MAX_PATH_LEN];
char tgt_obj_path[FSAL_MAX_PATH_LEN];
/* sanity checks.
* note : src/tgt_dir_attributes are optional.
*/
if(!old_parentdir_handle ||
!new_parentdir_handle || !p_old_name || !p_new_name || !p_context)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_rename);
if(!p_fs_ops->rename)
Return(ERR_FSAL_NOTSUPP, 0, INDEX_FSAL_rename);
/* get full path for parent source handle */
rc = NamespacePath(old_parentdir_handle->data.inode, old_parentdir_handle->data.device,
old_parentdir_handle->data.validator, src_dir_path);
if(rc)
Return(ERR_FSAL_STALE, rc, INDEX_FSAL_rename);
/* get full path for parent target handle */
rc = NamespacePath(new_parentdir_handle->data.inode, new_parentdir_handle->data.device,
new_parentdir_handle->data.validator, tgt_dir_path);
if(rc)
Return(ERR_FSAL_STALE, rc, INDEX_FSAL_rename);
/* build full path for source entry */
FSAL_internal_append_path(src_obj_path, src_dir_path, p_old_name->name);
/* build full path for target entry */
FSAL_internal_append_path(tgt_obj_path, tgt_dir_path, p_new_name->name);
/* set context for the next operation, so it can be retrieved by FS thread */
fsal_set_thread_context(p_context);
TakeTokenFSCall();
rc = p_fs_ops->rename(src_obj_path, tgt_obj_path);
ReleaseTokenFSCall();
/* Regarding FALSE parameter of function fuse2fsal_error:
* here, if error is ENOENT, we don't know weither the father handle is STALE
* or if the source entry does not exist.
* We choose returning ENOENT since the parent exists in the namespace,
* so it it more likely to exist than the children.
*/
if(rc)
Return(fuse2fsal_error(rc, FALSE), rc, INDEX_FSAL_rename);
/* If operation succeeded, impact the namespace */
NamespaceRename(old_parentdir_handle->data.inode, old_parentdir_handle->data.device,
old_parentdir_handle->data.validator, p_old_name->name,
new_parentdir_handle->data.inode, new_parentdir_handle->data.device,
new_parentdir_handle->data.validator, p_new_name->name);
/* Last parent post op attributes if asked */
if(src_dir_attributes)
{
fsal_status_t st;
st = FUSEFSAL_getattrs(old_parentdir_handle, p_context, src_dir_attributes);
if(FSAL_IS_ERROR(st))
{
FSAL_CLEAR_MASK(src_dir_attributes->asked_attributes);
FSAL_SET_MASK(src_dir_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
/* New parent post op attributes if asked */
if(tgt_dir_attributes)
{
fsal_status_t st;
/* optimization when src=tgt : */
if(!FUSEFSAL_handlecmp(old_parentdir_handle, new_parentdir_handle, &st)
&& src_dir_attributes)
{
/* If source dir = target dir, we just copy the attributes.
* to avoid doing another getattr.
*/
(*tgt_dir_attributes) = (*src_dir_attributes);
}
else
{
/* get attributes */
st = FUSEFSAL_getattrs(new_parentdir_handle, p_context, tgt_dir_attributes);
if(FSAL_IS_ERROR(st))
{
FSAL_CLEAR_MASK(tgt_dir_attributes->asked_attributes);
FSAL_SET_MASK(tgt_dir_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
}
/* OK */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_rename);
}