/**
* 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.
* - Another error code if an error occured during this call.
*/
fsal_status_t GPFSFSAL_open(fsal_handle_t * p_filehandle, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_openflags_t openflags, /* IN */
fsal_file_t * file_desc, /* OUT */
fsal_attrib_list_t * p_file_attributes /* [ IN/OUT ] */
)
{
int rc, errsv;
fsal_status_t status;
int fd;
int posix_flags = 0;
gpfsfsal_file_t * p_file_descriptor = (gpfsfsal_file_t *)file_desc;
/* sanity checks.
* note : file_attributes is optional.
*/
if(!p_filehandle || !p_context || !p_file_descriptor)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_open);
/* convert fsal open flags to posix open flags */
rc = fsal2posix_openflags(openflags, &posix_flags);
/* flags conflicts. */
if(rc)
{
LogWarn(COMPONENT_FSAL, "Invalid/conflicting flags : %#X", openflags);
Return(rc, 0, INDEX_FSAL_open);
}
TakeTokenFSCall();
status = fsal_internal_handle2fd(p_context, p_filehandle, &fd, posix_flags);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_open);
/* output attributes */
if(p_file_attributes)
{
p_file_attributes->asked_attributes = GPFS_SUPPORTED_ATTRIBUTES;
status = GPFSFSAL_getattrs(p_filehandle, p_context, p_file_attributes);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_open);
}
TakeTokenFSCall();
p_file_descriptor->fd = fd;
errsv = errno;
ReleaseTokenFSCall();
/* set the read-only flag of the file descriptor */
p_file_descriptor->ro = openflags & FSAL_O_RDONLY;
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_open);
}
/*
* Common code used by fsal_lookup and fsal_readdir -
* given the name try to stat an entry. If an entry is
* regular file or directory then open it and use fd2handle
* to get a real handle, otherwise use inum2handle to fake
* a handle.
*/
fsal_status_t
xfsfsal_stat_by_name(fsal_op_context_t * context,
int atfd,
const char *name,
fsal_handle_t *handle,
fsal_attrib_list_t * attributes)
{
int rc;
int errsv;
struct stat buffstat;
fsal_status_t st;
TakeTokenFSCall();
rc = fstatat(atfd, name, &buffstat, AT_SYMLINK_NOFOLLOW);
errsv = errno;
ReleaseTokenFSCall();
if(rc < 0)
ReturnCode(posix2fsal_error(errsv), errsv);
if(S_ISDIR(buffstat.st_mode) || S_ISREG(buffstat.st_mode))
{
int tmpfd;
TakeTokenFSCall();
tmpfd = openat(atfd, name, O_RDONLY | O_NOFOLLOW, 0600);
errsv = errno;
ReleaseTokenFSCall();
if(tmpfd < 0)
ReturnCode(posix2fsal_error(errsv), errsv);
st = fsal_internal_fd2handle(context, tmpfd, handle);
close(tmpfd);
}
else
{
st = fsal_internal_inum2handle(context, buffstat.st_ino, handle);
}
if(FSAL_IS_ERROR(st))
return st;
if(attributes)
{
st = posix2fsal_attributes(&buffstat, attributes);
if(FSAL_IS_ERROR(st))
{
FSAL_CLEAR_MASK(attributes->asked_attributes);
FSAL_SET_MASK(attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
return st;
}
/**
* FSAL_getattrs:
* Get attributes for the object specified by its filehandle.
*
* \param filehandle (input):
* The handle of the object to get parameters.
* \param cred (input):
* Authentication context for the operation (user,...).
* \param object_attributes (mandatory input/output):
* The retrieved attributes for the object.
* 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)
* - Another error code if an error occured.
*/
fsal_status_t XFSFSAL_getattrs(fsal_handle_t * p_filehandle, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_attrib_list_t * p_object_attributes /* IN/OUT */
)
{
int rc, errsv;
fsal_status_t st;
int fd;
struct stat buffstat;
/* sanity checks.
* note : object_attributes is mandatory in FSAL_getattrs.
*/
if(!p_filehandle || !p_context || !p_object_attributes)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_getattrs);
TakeTokenFSCall();
st = fsal_internal_handle2fd(p_context, p_filehandle, &fd, O_RDONLY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(st))
ReturnStatus(st, INDEX_FSAL_getattrs);
/* get file metadata */
TakeTokenFSCall();
rc = fstat(fd, &buffstat);
errsv = errno;
ReleaseTokenFSCall();
close(fd);
if(rc != 0)
{
if(errsv == ENOENT)
Return(ERR_FSAL_STALE, errsv, INDEX_FSAL_getattrs);
else
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_getattrs);
}
/* convert attributes */
st = posix2fsal_attributes(&buffstat, p_object_attributes);
if(FSAL_IS_ERROR(st))
{
FSAL_CLEAR_MASK(p_object_attributes->asked_attributes);
FSAL_SET_MASK(p_object_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
ReturnStatus(st, INDEX_FSAL_getattrs);
}
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_getattrs);
}
/**
* FSAL_sync:
* This function is used for processing stable writes and COMMIT requests.
* Calling this function makes sure the changes to a specific file are
* written to disk rather than kept in memory.
*
* \param file_descriptor (input):
* The file descriptor returned by FSAL_open.
*
* \return Major error codes:
* - ERR_FSAL_NO_ERROR: no error.
* - Another error code if an error occured during this call.
*/
fsal_status_t XFSFSAL_sync(xfsfsal_file_t * p_file_descriptor /* IN */)
{
int rc, errsv;
/* sanity checks. */
if(!p_file_descriptor)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_sync);
if( p_file_descriptor->fd == 0 )
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_sync); /* Nothing to sync, the file is not opened */
/* Flush data. */
TakeTokenFSCall();
rc = fsync(p_file_descriptor->fd);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
LogEvent(COMPONENT_FSAL, "Error in fsync operation");
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_sync);
}
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_sync);
}
fsal_status_t POSIXFSAL_close(fsal_file_t * file_descriptor, /* IN */
fsal_op_context_t * p_context /* IN */
)
{
posixfsal_file_t * p_file_descriptor = (posixfsal_file_t *) file_descriptor;
int rc, errsv;
/* sanity checks. */
if(!p_file_descriptor)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_close);
/* call to close */
TakeTokenFSCall();
#ifdef _FSAL_POSIX_USE_STREAM
rc = fclose(p_file_descriptor->p_file);
#else
rc = close(p_file_descriptor->filefd);
#endif
errsv = errno;
ReleaseTokenFSCall();
if(rc)
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_close);
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_close);
}
fsal_status_t GPFSFSAL_close(fsal_file_t * p_file_descriptor /* IN */
)
{
int rc, errsv;
/* sanity checks. */
if(!p_file_descriptor)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_close);
/* call to close */
TakeTokenFSCall();
rc = close(((gpfsfsal_file_t *)p_file_descriptor)->fd);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_close);
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_close);
}
/**
* FSAL_dynamic_fsinfo:
* Return dynamic filesystem info such as
* used size, free size, number of objects...
*
* \param filehandle (input):
* Handle of an object in the filesystem
* whom info is to be retrieved.
* \param cred (input):
* Authentication context for the operation (user,...).
* \param dynamicinfo (output):
* Pointer to the static info of the filesystem.
*
* \return Major error codes:
* - ERR_FSAL_NO_ERROR: no error.
* - ERR_FSAL_FAULT: NULL pointer passed as input parameter.
* - ERR_FSAL_SERVERFAULT: Unexpected error.
*/
fsal_status_t GPFSFSAL_dynamic_fsinfo(gpfsfsal_handle_t * p_filehandle, /* IN */
gpfsfsal_op_context_t * p_context, /* IN */
fsal_dynamicfsinfo_t * p_dynamicinfo /* OUT */
)
{
fsal_path_t pathfsal;
fsal_status_t status;
struct statvfs buffstatvfs;
int rc, errsv;
/* sanity checks. */
if(!p_filehandle || !p_dynamicinfo || !p_context)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_dynamic_fsinfo);
TakeTokenFSCall();
rc = fstatvfs(p_context->export_context->mount_root_fd, &buffstatvfs);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_dynamic_fsinfo);
p_dynamicinfo->total_bytes = buffstatvfs.f_frsize * buffstatvfs.f_blocks;
p_dynamicinfo->free_bytes = buffstatvfs.f_frsize * buffstatvfs.f_bfree;
p_dynamicinfo->avail_bytes = buffstatvfs.f_frsize * buffstatvfs.f_bavail;
p_dynamicinfo->total_files = buffstatvfs.f_files;
p_dynamicinfo->free_files = buffstatvfs.f_ffree;
p_dynamicinfo->avail_files = buffstatvfs.f_favail;
p_dynamicinfo->time_delta.seconds = 1;
p_dynamicinfo->time_delta.nseconds = 0;
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_dynamic_fsinfo);
}
/**
* return index if found,
* negative value on error.
*/
static int xattr_name_to_id(libzfswrap_vfs_t *p_vfs, zfsfsal_op_context_t *p_context, zfsfsal_handle_t *p_objecthandle, const char *psz_name, unsigned int *p_id)
{
unsigned int i;
char *psz_buffer, *ptr;
size_t i_size;
creden_t cred;
cred.uid = p_context->credential.user;
cred.gid = p_context->credential.group;
/* get xattrs */
TakeTokenFSCall();
int rc = libzfswrap_listxattr(p_vfs, &cred,
p_objecthandle->data.zfs_handle, &psz_buffer, &i_size);
ReleaseTokenFSCall();
if(rc)
return posix2fsal_error(rc);
for(ptr = psz_buffer, i = 0; ptr < psz_buffer + i_size; i++, ptr += strlen(ptr) + 1)
{
if(!strcmp(psz_name, ptr))
{
*p_id = i + XATTR_COUNT;
free(psz_buffer);
return ERR_FSAL_NO_ERROR;
}
}
free(psz_buffer);
return ERR_FSAL_NOENT;
}
/**
* FSAL_commit:
* This function is used for processing stable writes and COMMIT requests.
* Calling this function makes sure the changes to a specific file are
* written to disk rather than kept in memory.
*
* \param file_descriptor (input):
* The file descriptor returned by FSAL_open.
* \param offset:
* The starting offset for the portion of file to be synced
* \param length:
* The length for the portion of file to be synced.
*
* \return Major error codes:
* - ERR_FSAL_NO_ERROR: no error.
* - Another error code if an error occured during this call.
*/
fsal_status_t POSIXFSAL_commit(fsal_file_t * file_descriptor,
fsal_op_context_t * p_context, /* IN */
fsal_off_t offset,
fsal_size_t length )
{
posixfsal_file_t * p_file_descriptor = (posixfsal_file_t *) file_descriptor;
int rc, errsv;
/* sanity checks. */
if(!p_file_descriptor)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_commit);
/* Flush data. */
TakeTokenFSCall();
rc = fsync(p_file_descriptor->filefd);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
LogEvent(COMPONENT_FSAL, "Error in fsync operation");
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_commit);
}
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_commit);
}
/**
* FSAL_mkdir:
* Create a directory.
*
* \param parent_directory_handle (input):
* Handle of the parent directory where
* the subdirectory is to be created.
* \param p_dirname (input):
* Pointer to the name of the directory to be created.
* \param cred (input):
* Authentication context for the operation (user,...).
* \param accessmode (input):
* Mode for the directory to be created.
* (the umask defined into the FSAL configuration file
* will be applied on it).
* \param object_handle (output):
* Pointer to the handle of the created directory.
* \param object_attributes (optionnal input/output):
* The attributes of the created directory.
* 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).
* May be NULL.
*
* \return Major error codes :
* - ERR_FSAL_NO_ERROR (no error)
* - ERR_FSAL_STALE (parent_directory_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_ACCESS, ERR_FSAL_EXIST, ERR_FSAL_IO, ...
*
* NB: if getting postop attributes failed,
* the function does not return an error
* but the FSAL_ATTR_RDATTR_ERR bit is set in
* the object_attributes->asked_attributes field.
*/
fsal_status_t ZFSFSAL_mkdir(zfsfsal_handle_t * parent_directory_handle, /* IN */
fsal_name_t * p_dirname, /* IN */
zfsfsal_op_context_t * p_context, /* IN */
fsal_accessmode_t accessmode, /* IN */
zfsfsal_handle_t * object_handle, /* OUT */
fsal_attrib_list_t * object_attributes /* [ IN/OUT ] */
)
{
int rc;
mode_t unix_mode;
/* sanity checks.
* note : object_attributes is optional.
*/
if(!parent_directory_handle || !p_context || !object_handle || !p_dirname)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_mkdir);
/* convert fsal args to ZFS args */
unix_mode = fsal2unix_mode(accessmode);
/* Applying FSAL umask */
unix_mode = unix_mode & ~global_fs_info.umask;
TakeTokenFSCall();
/* Create the directory */
inogen_t object;
rc = libzfswrap_mkdir(p_context->export_context->p_vfs, &p_context->user_credential.cred,
parent_directory_handle->data.zfs_handle, p_dirname->name, unix_mode, &object);
ReleaseTokenFSCall();
/* >> interpret returned error << */
if(rc)
Return(posix2fsal_error(rc), 0, INDEX_FSAL_create);
/* set output handle */
object_handle->data.zfs_handle = object;
object_handle->data.type = FSAL_TYPE_DIR;
if(object_attributes)
{
/**@TODO: skip this => libzfswrap_mkdir might return attributes */
fsal_status_t status = ZFSFSAL_getattrs(object_handle, p_context, object_attributes);
/* on error, we set a special bit in the mask. */
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(object_attributes->asked_attributes);
FSAL_SET_MASK(object_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
/* OK */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_mkdir);
}
/**
* FSAL_commit:
* This function is used for processing stable writes and COMMIT requests.
* Calling this function makes sure the changes to a specific file are
* written to disk rather than kept in memory.
*
* \param file_descriptor (input):
* The file descriptor returned by FSAL_open.
* \param offset:
* The starting offset for the portion of file to be synced
* \param length:
* The length for the portion of file to be synced.
*
* \return Major error codes:
* - ERR_FSAL_NO_ERROR: no error.
* - Another error code if an error occured during this call.
*/
fsal_status_t XFSFSAL_commit( fsal_file_t * p_file_descriptor,
fsal_op_context_t * p_context, /* IN */
fsal_off_t offset,
fsal_size_t length )
{
int rc, errsv;
/* sanity checks. */
if(!p_file_descriptor)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_commit);
if(((xfsfsal_file_t *)p_file_descriptor)->fd == 0 )
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_commit); /* Nothing to sync, the file is not opened */
/* Flush data. */
TakeTokenFSCall();
rc = fsync(((xfsfsal_file_t *)p_file_descriptor)->fd);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
LogEvent(COMPONENT_FSAL, "Error in fsync operation");
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_commit);
}
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_commit);
}
fsal_status_t ZFSFSAL_SetXAttrValue(fsal_handle_t * obj_handle, /* IN */
const fsal_name_t * xattr_name, /* IN */
fsal_op_context_t * p_context, /* IN */
caddr_t buffer_addr, /* IN */
size_t buffer_size, /* IN */
int create /* IN */
)
{
//@TODO: use the create parameter ?
int rc;
creden_t cred;
zfsfsal_handle_t * p_objecthandle = (zfsfsal_handle_t *)obj_handle;
/* Hook to prevent any modification in the snapshots */
if(p_objecthandle->data.i_snap != 0)
Return(ERR_FSAL_ROFS, 0, INDEX_FSAL_SetXAttrValue);
/* Remove trailing '\n', if any */
chomp_attr_value((char*)buffer_addr, buffer_size);
cred.uid = p_context->credential.user;
cred.gid = p_context->credential.group;
TakeTokenFSCall();
rc = libzfswrap_setxattr(((zfsfsal_op_context_t *)p_context)->export_context->p_vfs, &cred,
p_objecthandle->data.zfs_handle, xattr_name->name, (char*)buffer_addr);
ReleaseTokenFSCall();
if(rc)
Return(posix2fsal_error(rc), 0, INDEX_FSAL_SetXAttrValue);
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_SetXAttrValue);
}
/*
* Free the resources allocated for reading directory entries.
*
* \param dir_descriptor (input):
* Pointer to a directory descriptor filled by FSAL_opendir.
*
* \return Major error codes :
* - ERR_FSAL_NO_ERROR (no error)
* - ERR_FSAL_FAULT (a NULL pointer was passed as mandatory argument)
* - Other error codes can be returned :
* ERR_FSAL_IO, ...
*/
fsal_status_t dpmfsal_closedir(fsal_dir_t * dir_descriptor // IN
)
{
int rc;
// Sanity checks
if (!dir_descriptor)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_closedir);
LogInfo(COMPONENT_FSAL, "dpmfsal_closedir: start");
TakeTokenFSCall();
rc = dpns_closedir(dir_descriptor->p_dir);
ReleaseTokenFSCall();
if (rc)
Return(dpns2fsal_error(serrno), serrno, INDEX_FSAL_opendir);
if (dpns_endsess() < 0)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_closedir);
// Fill the descriptor with 0s
memset(dir_descriptor, 0, sizeof(fsal_dir_t));
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_closedir);
}
/**
* Removes a xattr by Id
*
* \param p_objecthandle Handle of the object you want to get attribute for.
* \param p_context pointer to the current security context.
* \param xattr_id xattr's id
*/
fsal_status_t ZFSFSAL_RemoveXAttrById(fsal_handle_t * obj_handle, /* IN */
fsal_op_context_t * context, /* IN */
unsigned int xattr_id) /* IN */
{
int rc;
creden_t cred;
char psz_name[FSAL_MAX_NAME_LEN];
zfsfsal_handle_t * p_objecthandle = (zfsfsal_handle_t *)obj_handle;
zfsfsal_op_context_t *p_context = (zfsfsal_op_context_t *)context;
/* Hook to prevent any modification in the snapshots */
if(p_objecthandle->data.i_snap != 0)
Return(ERR_FSAL_ROFS, 0, INDEX_FSAL_SetXAttrValue);
if((rc = xattr_id_to_name(p_context->export_context->p_vfs, p_context, p_objecthandle,
xattr_id, psz_name)))
Return(rc, 0, INDEX_FSAL_SetXAttrValue);
cred.uid = p_context->credential.user;
cred.gid = p_context->credential.group;
TakeTokenFSCall();
rc = libzfswrap_removexattr(p_context->export_context->p_vfs, &cred,
p_objecthandle->data.zfs_handle, psz_name);
ReleaseTokenFSCall();
if(rc)
Return(posix2fsal_error(rc), 0, INDEX_FSAL_SetXAttrValue);
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_SetXAttrValue);
}
fsal_status_t ZFSFSAL_close(zfsfsal_file_t * file_descriptor /* IN */
)
{
int rc = 0;
/* sanity checks. */
if(!file_descriptor)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_close);
TakeTokenFSCall();
if(!file_descriptor->is_closed)
{
rc = libzfswrap_close(file_descriptor->p_vfs, &file_descriptor->cred,
file_descriptor->p_vnode, file_descriptor->flags);
file_descriptor->is_closed = 1;
}
ReleaseTokenFSCall();
if(rc)
Return(posix2fsal_error(rc), rc, INDEX_FSAL_close);
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_close);
}
/**
* Get the value of an extended attribute from its name.
*
* \param p_objecthandle Handle of the object you want to get attribute for.
* \param xattr_name the name of the attribute to be read.
* \param p_context pointer to the current security context.
* \param buffer_addr address of the buffer where the xattr value is to be stored.
* \param buffer_size size of the buffer where the xattr value is to be stored.
* \param p_output_size size of the data actually stored into the buffer.
*/
fsal_status_t ZFSFSAL_GetXAttrValueByName(fsal_handle_t * obj_handle, /* IN */
const fsal_name_t * xattr_name, /* IN */
fsal_op_context_t * p_context, /* IN */
caddr_t buffer_addr, /* IN/OUT */
size_t buffer_size, /* IN */
size_t * p_output_size /* OUT */
)
{
unsigned int index;
char *psz_value;
int rc;
creden_t cred;
zfsfsal_handle_t *p_objecthandle = (zfsfsal_handle_t *)obj_handle;
/* sanity checks */
if(!p_objecthandle || !p_context || !p_output_size || !buffer_addr || !xattr_name)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_GetXAttrValue);
/* look for this name */
for(index = 0; index < XATTR_COUNT; index++)
{
if(do_match_type(xattr_list[index].flags, p_objecthandle->data.type)
&& !strcmp(xattr_list[index].xattr_name, xattr_name->name))
{
return ZFSFSAL_GetXAttrValueById((fsal_handle_t *)p_objecthandle, index, p_context, buffer_addr,
buffer_size, p_output_size);
}
}
/* Get the right VFS */
libzfswrap_vfs_t *p_vfs = ZFSFSAL_GetVFS(p_objecthandle);
if(!p_vfs)
{
ZFSFSAL_VFS_Unlock();
Return(ERR_FSAL_NOENT, 0, INDEX_FSAL_GetXAttrValue);
}
cred.uid = p_context->credential.user;
cred.gid = p_context->credential.group;
TakeTokenFSCall();
if((rc = libzfswrap_getxattr(p_vfs, &cred,
p_objecthandle->data.zfs_handle, xattr_name->name, &psz_value)))
{
ZFSFSAL_VFS_Unlock();
Return(posix2fsal_error(rc), 0, INDEX_FSAL_GetXAttrValue);
}
ZFSFSAL_VFS_Unlock();
/* Copy the string (remove this call by changing the libzfswrap API) */
strncpy(buffer_addr, psz_value, buffer_size);
buffer_addr[buffer_size - 1] = '\0';
*p_output_size = strlen(psz_value);
free(psz_value);
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_GetXAttrValue);
}
/**
* FSAL_opendir :
* Opens a directory for reading its content.
*
* \param dir_handle (input)
* the handle of the directory to be opened.
* \param cred (input)
* Permission context for the operation (user,...).
* \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.
* May be NULL.
*
* \return Major error codes :
* - ERR_FSAL_NO_ERROR (no error)
* - Another error code if an error occured.
*/
fsal_status_t GPFSFSAL_opendir(fsal_handle_t * p_dir_handle, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_dir_t * dir_desc, /* OUT */
fsal_attrib_list_t * p_dir_attributes /* [ IN/OUT ] */
)
{
fsal_status_t status;
fsal_accessflags_t access_mask = 0;
fsal_attrib_list_t dir_attrs;
gpfsfsal_dir_t *p_dir_descriptor = (gpfsfsal_dir_t *)dir_desc;
/* sanity checks
* note : dir_attributes is optionnal.
*/
if(!p_dir_handle || !p_context || !p_dir_descriptor)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_opendir);
/* get the path of the directory */
TakeTokenFSCall();
status =
fsal_internal_handle2fd(p_context, p_dir_handle,
&p_dir_descriptor->fd,
O_RDONLY | O_DIRECTORY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_opendir);
/* get directory metadata */
dir_attrs.asked_attributes = GPFS_SUPPORTED_ATTRIBUTES;
status = GPFSFSAL_getattrs(p_dir_handle, p_context, &dir_attrs);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_opendir);
/* Test access rights for this directory */
/* Set both mode and ace4 mask */
access_mask = FSAL_MODE_MASK_SET(FSAL_R_OK) |
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_LIST_DIR);
status = fsal_internal_testAccess(p_context, access_mask, NULL, &dir_attrs);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_opendir);
/* if everything is OK, fills the dir_desc structure : */
memcpy(&(p_dir_descriptor->context), p_context, sizeof(fsal_op_context_t));
memcpy(&(p_dir_descriptor->handle), p_dir_handle, sizeof(fsal_handle_t));
if(p_dir_attributes)
*p_dir_attributes = dir_attrs;
p_dir_descriptor->dir_offset = 0;
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_opendir);
}
fsal_status_t SNMPFSAL_readlink(snmpfsal_handle_t * linkhandle, /* IN */
snmpfsal_op_context_t * p_context, /* IN */
fsal_path_t * p_link_content, /* OUT */
fsal_attrib_list_t * link_attributes /* [ IN/OUT ] */
)
{
int rc;
fsal_status_t st;
char link_content_out[FSAL_MAX_PATH_LEN];
/* sanity checks.
* note : link_attributes is optional.
*/
if(!linkhandle || !p_context || !p_link_content)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_readlink);
TakeTokenFSCall();
/* >> call your filesystem readlink function << */
ReleaseTokenFSCall();
/* >> convert error code and return on error << */
/* >> convert fs output to fsal_path_t
* for example, if this is a char * (link_content_out) :
*/
st = FSAL_str2path(link_content_out, FSAL_MAX_PATH_LEN, p_link_content);
if(FSAL_IS_ERROR(st))
Return(st.major, st.minor, INDEX_FSAL_readlink);
/* retrieves object attributes, if asked */
if(link_attributes)
{
fsal_status_t status;
status = SNMPFSAL_getattrs(linkhandle, p_context, link_attributes);
/* On error, we set a flag in the returned attributes */
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(link_attributes->asked_attributes);
FSAL_SET_MASK(link_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_readlink);
}
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_status_t ZFSFSAL_readlink(zfsfsal_handle_t * linkhandle, /* IN */
zfsfsal_op_context_t * p_context, /* IN */
fsal_path_t * p_link_content, /* OUT */
fsal_attrib_list_t * link_attributes /* [ IN/OUT ] */
)
{
int rc;
fsal_status_t st;
char link_content_out[FSAL_MAX_PATH_LEN];
/* sanity checks.
* note : link_attributes is optional.
*/
if(!linkhandle || !p_context || !p_link_content)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_readlink);
TakeTokenFSCall();
rc = libzfswrap_readlink(p_context->export_context->p_vfs, &p_context->user_credential.cred,
linkhandle->data.zfs_handle, link_content_out, sizeof(link_content_out));
ReleaseTokenFSCall();
/* >> convert error code and return on error << */
/* >> convert fs output to fsal_path_t
* for example, if this is a char * (link_content_out) :
*/
st = FSAL_str2path(link_content_out, FSAL_MAX_PATH_LEN, p_link_content);
if(FSAL_IS_ERROR(st))
Return(st.major, st.minor, INDEX_FSAL_readlink);
/* retrieves object attributes, if asked */
if(link_attributes)
{
fsal_status_t status;
status = ZFSFSAL_getattrs(linkhandle, p_context, link_attributes);
/* On error, we set a flag in the returned attributes */
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(link_attributes->asked_attributes);
FSAL_SET_MASK(link_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_readlink);
}
fsal_status_t ZFSFSAL_symlink(zfsfsal_handle_t * parent_directory_handle, /* IN */
fsal_name_t * p_linkname, /* IN */
fsal_path_t * p_linkcontent, /* IN */
zfsfsal_op_context_t * p_context, /* IN */
fsal_accessmode_t accessmode, /* IN (ignored) */
zfsfsal_handle_t * link_handle, /* OUT */
fsal_attrib_list_t * link_attributes /* [ IN/OUT ] */
)
{
int rc;
/* sanity checks.
* note : link_attributes is optional.
*/
if(!parent_directory_handle ||
!p_context || !link_handle || !p_linkname || !p_linkcontent)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_symlink);
/* Tests if symlinking is allowed by configuration. */
if(!global_fs_info.symlink_support)
Return(ERR_FSAL_NOTSUPP, 0, INDEX_FSAL_symlink);
TakeTokenFSCall();
inogen_t object;
rc = libzfswrap_symlink(p_context->export_context->p_vfs, &p_context->user_credential.cred,
parent_directory_handle->data.zfs_handle, p_linkname->name,
p_linkcontent->path, &object);
ReleaseTokenFSCall();
/* >> convert status and return on error << */
/* >> set output handle << */
link_handle->data.zfs_handle = object;
link_handle->data.type = FSAL_TYPE_LNK;
if(link_attributes)
{
fsal_status_t status = ZFSFSAL_getattrs(link_handle, p_context, link_attributes);
/* On error, we set a flag in the returned attributes */
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(link_attributes->asked_attributes);
FSAL_SET_MASK(link_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
/* OK */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_symlink);
}
/**
* FSAL_getetxattrs:
* Get attributes for the object specified by its filehandle.
*
* \param filehandle (input):
* The handle of the object to get parameters.
* \param cred (input):
* Authentication context for the operation (user,...).
* \param object_attributes (mandatory input/output):
* The retrieved attributes for the object.
* 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)
* - Another error code if an error occured.
*/
fsal_status_t XFSFSAL_getextattrs(xfsfsal_handle_t * p_filehandle, /* IN */
xfsfsal_op_context_t * p_context, /* IN */
fsal_extattrib_list_t * p_object_attributes /* OUT */
)
{
fsal_status_t st ;
xfs_bstat_t bstat;
xfs_ino_t xfs_ino;
struct stat buffstat;
int fd = 0 ;
/* sanity checks.
* note : object_attributes is mandatory in FSAL_getattrs.
*/
if(!p_filehandle || !p_context || !p_object_attributes)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_getattrs);
TakeTokenFSCall();
st = fsal_internal_handle2fd(p_context, p_filehandle, &fd, O_RDONLY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(st))
ReturnStatus(st, INDEX_FSAL_getextattrs);
if( p_object_attributes->asked_attributes & FSAL_ATTR_GENERATION )
{
/* get file metadata */
xfs_ino = p_filehandle->data.inode ;
TakeTokenFSCall();
if(fsal_internal_get_bulkstat_by_inode(fd, &xfs_ino, &bstat) < 0)
{
close(fd);
ReleaseTokenFSCall();
ReturnCode(posix2fsal_error(errno), errno);
}
ReleaseTokenFSCall();
p_object_attributes->generation = bstat.bs_gen ;
}
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_getextattrs);
} /* XFSFSAL_getextattrs */
/**
* FSAL_create:
* Create a regular file.
*
* \param parent_directory_handle (input):
* Handle of the parent directory where the file is to be created.
* \param p_filename (input):
* Pointer to the name of the file to be created.
* \param cred (input):
* Authentication context for the operation (user, export...).
* \param accessmode (input):
* Mode for the file to be created.
* (the umask defined into the FSAL configuration file
* will be applied on it).
* \param object_handle (output):
* Pointer to the handle of the created file.
* \param object_attributes (optionnal input/output):
* The postop attributes of the created file.
* 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).
* Can be NULL.
*
* \return Major error codes :
* - ERR_FSAL_NO_ERROR (no error)
* - ERR_FSAL_STALE (parent_directory_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_ACCESS, ERR_FSAL_EXIST, ERR_FSAL_IO, ...
*
* NB: if getting postop attributes failed,
* the function does not return an error
* but the FSAL_ATTR_RDATTR_ERR bit is set in
* the object_attributes->asked_attributes field.
*/
fsal_status_t ZFSFSAL_create(zfsfsal_handle_t * parent_directory_handle, /* IN */
fsal_name_t * p_filename, /* IN */
zfsfsal_op_context_t * p_context, /* IN */
fsal_accessmode_t accessmode, /* IN */
zfsfsal_handle_t * object_handle, /* OUT */
fsal_attrib_list_t * object_attributes /* [ IN/OUT ] */
)
{
int rc;
/* sanity checks.
* note : object_attributes is optional.
*/
if(!parent_directory_handle || !p_context || !object_handle || !p_filename)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_create);
/* >> convert fsal args to your fs args.
* Don't forget applying FSAL umask :
* mode = mode & ~global_fs_info.umask << */
TakeTokenFSCall();
inogen_t object;
rc = libzfswrap_create(p_context->export_context->p_vfs, &p_context->user_credential.cred,
parent_directory_handle->data.zfs_handle, p_filename->name,
fsal2unix_mode(accessmode), &object);
ReleaseTokenFSCall();
/* >> interpret returned error << */
if(rc)
Return(posix2fsal_error(rc), 0, INDEX_FSAL_create);
/* >> set output handle << */
object_handle->data.zfs_handle = object;
object_handle->data.type = FSAL_TYPE_FILE;
if(object_attributes)
{
fsal_status_t status = ZFSFSAL_getattrs(object_handle, p_context, object_attributes);
/* on error, we set a special bit in the mask. */
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(object_attributes->asked_attributes);
FSAL_SET_MASK(object_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
/* OK */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_create);
}
/**
* FSAL_link:
* Create a hardlink.
*
* \param exttarget (input):
* Handle of the target object.
* \param extdir (input):
* Pointer to the directory handle where
* the hardlink is to be created.
* \param link_name (input):
* Pointer to the name of the hardlink to be created.
* \param extcontext (input):
* Authentication context for the operation (user,...).
* \param accessmode (input):
* Mode for the directory to be created.
* (the umask defined into the FSAL configuration file
* will be applied on it).
* \param attributes (optionnal input/output):
* The post_operation attributes of the linked object.
* 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).
* May be NULL.
*
* \return Major error codes :
* - ERR_FSAL_NO_ERROR (no error)
* - ERR_FSAL_STALE (target or dir 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_ACCESS, ERR_FSAL_EXIST, ERR_FSAL_IO, ...
*
* NB: if getting postop attributes failed,
* the function does not return an error
* but the FSAL_ATTR_RDATTR_ERR bit is set in
* the attributes->asked_attributes field.
*/
fsal_status_t CEPHFSAL_link(fsal_handle_t * exttarget,
fsal_handle_t * extdir,
fsal_name_t * link_name,
fsal_op_context_t * extcontext,
fsal_attrib_list_t * attributes)
{
int rc;
struct stat st;
char strname[FSAL_MAX_NAME_LEN];
cephfsal_handle_t* target = (cephfsal_handle_t*) exttarget;
cephfsal_handle_t* dir = (cephfsal_handle_t*) extdir;
cephfsal_op_context_t* context = (cephfsal_op_context_t*) context;
struct ceph_mount_info *cmount = context->export_context->cmount;
int uid = FSAL_OP_CONTEXT_TO_UID(context);
int gid = FSAL_OP_CONTEXT_TO_GID(context);
/* sanity checks.
* note : attributes is optional.
*/
if(!target || !dir || !context || !link_name)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_link);
memset(target, 0, sizeof(cephfsal_handle_t));
/* Tests if hardlinking is allowed by configuration. */
if(!global_fs_info.link_support)
Return(ERR_FSAL_NOTSUPP, 0, INDEX_FSAL_link);
FSAL_name2str(link_name, strname, FSAL_MAX_NAME_LEN);
TakeTokenFSCall();
rc = ceph_ll_link(cmount, VINODE(target), VINODE(dir), strname, &st,
uid, gid);
ReleaseTokenFSCall();
if (rc < 0)
Return(posix2fsal_error(rc), 0, INDEX_FSAL_link);
if(attributes)
{
fsal_status_t status;
status = posix2fsal_attributes(&st, attributes);
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(attributes->asked_attributes);
FSAL_SET_MASK(attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_link);
}
}
/* OK */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_link);
}
/**
* GPFSFSAL_getattrs:
* Get attributes for the object specified by its filehandle.
*
* \param filehandle (input):
* The handle of the object to get parameters.
* \param cred (input):
* Authentication context for the operation (user,...).
* \param object_attributes (mandatory input/output):
* The retrieved attributes for the object.
* 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)
* - Another error code if an error occured.
*/
fsal_status_t GPFSFSAL_getattrs(fsal_handle_t * p_filehandle, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_attrib_list_t * p_object_attributes /* IN/OUT */
)
{
fsal_status_t st;
gpfsfsal_xstat_t buffxstat;
#ifdef _USE_NFS4_ACL
fsal_accessflags_t access_mask = 0;
#endif
/* sanity checks.
* note : object_attributes is mandatory in GPFSFSAL_getattrs.
*/
if(!p_filehandle || !p_context || !p_object_attributes)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_getattrs);
TakeTokenFSCall();
st = fsal_get_xstat_by_handle(p_context,
p_filehandle,
&buffxstat);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(st))
ReturnStatus(st, INDEX_FSAL_getattrs);
/* convert attributes */
st = gpfsfsal_xstat_2_fsal_attributes(&buffxstat, p_object_attributes);
if(FSAL_IS_ERROR(st))
{
FSAL_CLEAR_MASK(p_object_attributes->asked_attributes);
FSAL_SET_MASK(p_object_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
ReturnStatus(st, INDEX_FSAL_getattrs);
}
#ifdef _USE_NFS4_ACL
if(p_object_attributes->acl)
{
/* Check permission to get attributes and ACL. */
access_mask = FSAL_MODE_MASK_SET(0) | /* Dummy */
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_READ_ATTR |
FSAL_ACE_PERM_READ_ACL);
st = fsal_internal_testAccess(p_context, access_mask, NULL, p_object_attributes);
if(FSAL_IS_ERROR(st))
ReturnStatus(st, INDEX_FSAL_getattrs);
}
#endif
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_getattrs);
}
/**
* FSAL_read:
* Perform a read operation on an opened file.
*
* \param file_descriptor (input):
* The file descriptor returned by FSAL_open.
* \param seek_descriptor (optional input):
* Specifies the position where data is to be read.
* If not specified, data will be read at the current position.
* \param buffer_size (input):
* Amount (in bytes) of data to be read.
* \param buffer (output):
* Address where the read data is to be stored in memory.
* \param read_amount (output):
* Pointer to the amount of data (in bytes) that have been read
* during this call.
* \param end_of_file (output):
* Pointer to a boolean that indicates whether the end of file
* has been reached during this call.
*
* \return Major error codes:
* - ERR_FSAL_NO_ERROR (no error)
* - ERR_FSAL_INVAL (invalid parameter)
* - ERR_FSAL_NOT_OPENED (tried to read in a non-opened zfsfsal_file_t)
* - ERR_FSAL_FAULT (a NULL pointer was passed as mandatory argument)
* - Other error codes can be returned :
* ERR_FSAL_IO, ...
*/
fsal_status_t ZFSFSAL_read(zfsfsal_file_t * file_descriptor, /* IN */
fsal_seek_t * seek_descriptor, /* [IN] */
fsal_size_t buffer_size, /* IN */
caddr_t buffer, /* OUT */
fsal_size_t * read_amount, /* OUT */
fsal_boolean_t * end_of_file /* OUT */
)
{
off_t offset = 0;
int rc;
int behind = 0;
/* sanity checks. */
if(!file_descriptor || !buffer || !read_amount || !end_of_file)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_read);
TakeTokenFSCall();
if(seek_descriptor)
{
switch(seek_descriptor->whence)
{
case FSAL_SEEK_CUR:
offset = file_descriptor->current_offset + seek_descriptor->offset;
break;
case FSAL_SEEK_SET:
offset = seek_descriptor->offset;
break;
case FSAL_SEEK_END:
behind = 1;
offset = seek_descriptor->offset;
break;
}
}
rc = libzfswrap_read(file_descriptor->p_vfs, &file_descriptor->cred, file_descriptor->p_vnode, buffer, buffer_size, behind, offset);
ReleaseTokenFSCall();
/* >> interpreted returned status << */
if(!rc)
*end_of_file = 1;
/* >> dont forget setting output vars : read_amount, end_of_file << */
*read_amount = buffer_size;
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_read);
}
/**
* FSAL_link:
* Create a hardlink.
*
* \param target_handle (input):
* Handle of the target object.
* \param dir_handle (input):
* Pointer to the directory handle where
* the hardlink is to be created.
* \param p_link_name (input):
* Pointer to the name of the hardlink to be created.
* \param cred (input):
* Authentication context for the operation (user,...).
* \param accessmode (input):
* Mode for the directory to be created.
* (the umask defined into the FSAL configuration file
* will be applied on it).
* \param attributes (optionnal input/output):
* The post_operation attributes of the linked object.
* 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).
* May be NULL.
*
* \return Major error codes :
* - ERR_FSAL_NO_ERROR (no error)
* - ERR_FSAL_STALE (target_handle or 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_ACCESS, ERR_FSAL_EXIST, ERR_FSAL_IO, ...
*
* NB: if getting postop attributes failed,
* the function does not return an error
* but the FSAL_ATTR_RDATTR_ERR bit is set in
* the attributes->asked_attributes field.
*/
fsal_status_t ZFSFSAL_link(zfsfsal_handle_t * target_handle, /* IN */
zfsfsal_handle_t * dir_handle, /* IN */
fsal_name_t * p_link_name, /* IN */
zfsfsal_op_context_t * p_context, /* IN */
fsal_attrib_list_t * attributes /* [ IN/OUT ] */
)
{
int rc;
/* sanity checks.
* note : attributes is optional.
*/
if(!target_handle || !dir_handle || !p_context || !p_link_name)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_link);
/* Tests if hardlinking is allowed by configuration. */
if(!global_fs_info.link_support)
Return(ERR_FSAL_NOTSUPP, 0, INDEX_FSAL_link);
TakeTokenFSCall();
rc = libzfswrap_link(p_context->export_context->p_vfs, &p_context->user_credential.cred,
dir_handle->data.zfs_handle, target_handle->data.zfs_handle, p_link_name->name);
ReleaseTokenFSCall();
/* >> interpret returned error << */
if(rc)
Return(posix2fsal_error(rc), 0, INDEX_FSAL_link);
if(attributes)
{
fsal_status_t status = ZFSFSAL_getattrs(target_handle, p_context, attributes);
/* on error, we set a special bit in the mask. */
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(attributes->asked_attributes);
FSAL_SET_MASK(attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
/* OK */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_link);
}
/**
* FSAL_write:
* Perform a write operation on an opened file.
*
* \param file_descriptor (input):
* The file descriptor returned by FSAL_open.
* \param seek_descriptor (optional input):
* Specifies the position where data is to be written.
* If not specified, data will be written at the current position.
* \param buffer_size (input):
* Amount (in bytes) of data to be written.
* \param buffer (input):
* Address in memory of the data to write to file.
* \param write_amount (output):
* Pointer to the amount of data (in bytes) that have been written
* during this call.
*
* \return Major error codes:
* - ERR_FSAL_NO_ERROR (no error)
* - ERR_FSAL_INVAL (invalid parameter)
* - ERR_FSAL_NOT_OPENED (tried to write in a non-opened zfsfsal_file_t)
* - ERR_FSAL_FAULT (a NULL pointer was passed as mandatory argument)
* - Other error codes can be returned :
* ERR_FSAL_IO, ERR_FSAL_NOSPC, ERR_FSAL_DQUOT...
*/
fsal_status_t ZFSFSAL_write(zfsfsal_file_t * file_descriptor, /* IN */
fsal_seek_t * seek_descriptor, /* IN */
fsal_size_t buffer_size, /* IN */
caddr_t buffer, /* IN */
fsal_size_t * write_amount /* OUT */
)
{
int rc, behind = 0;
off_t offset;
/* sanity checks. */
if(!file_descriptor || !buffer || !write_amount)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_write);
TakeTokenFSCall();
if(seek_descriptor)
{
switch(seek_descriptor->whence)
{
case FSAL_SEEK_CUR:
offset = file_descriptor->current_offset + seek_descriptor->offset;
break;
case FSAL_SEEK_SET:
offset = seek_descriptor->offset;
break;
case FSAL_SEEK_END:
behind = 1;
offset = seek_descriptor->offset;
break;
}
}
rc = libzfswrap_write(file_descriptor->p_vfs, &file_descriptor->cred, file_descriptor->p_vnode, buffer, buffer_size, behind, offset);
ReleaseTokenFSCall();
/* >> interpreted returned status << */
if(rc)
Return(posix2fsal_error(rc), 0, INDEX_FSAL_write);
/* >> dont forget setting output vars : write_amount << */
*write_amount = buffer_size;
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_write);
}
/**
* FSAL_opendir :
* Opens a directory for reading its content.
*
* \param exthandle (input)
* the handle of the directory to be opened.
* \param extcontext (input)
* Permission context for the operation (user, export context...).
* \param extdescriptor (output)
* pointer to an allocated structure that will receive
* directory stream informations, on successfull completion.
* \param 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 (exthandle 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 CEPHFSAL_opendir(fsal_handle_t * exthandle,
fsal_op_context_t * extcontext,
fsal_dir_t * extdescriptor,
fsal_attrib_list_t * dir_attributes)
{
cephfsal_handle_t* handle = (cephfsal_handle_t*) exthandle;
cephfsal_op_context_t* context = (cephfsal_op_context_t*) extcontext;
cephfsal_dir_t* descriptor = (cephfsal_dir_t*) extdescriptor;
fsal_status_t status;
int rc;
int uid = FSAL_OP_CONTEXT_TO_UID(context);
int gid = FSAL_OP_CONTEXT_TO_GID(context);
struct ceph_dir_result *dh;
/* sanity checks
* note : dir_attributes is optional.
*/
if(!handle || !context || !descriptor)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_opendir);
TakeTokenFSCall();
/* XXX ceph_ll_opendir has void in the interface, but Client::ll_opendir
* is using dir_result_t. */
rc = ceph_ll_opendir(context->export_context->cmount, VINODE(handle),
(void *) &dh, uid, gid);
ReleaseTokenFSCall();
if (rc < 0)
Return(posix2fsal_error(rc), 0, INDEX_FSAL_opendir);
descriptor->dh = dh;
descriptor->vi = VINODE(handle);
descriptor->ctx = *context;
if(dir_attributes)
{
status = CEPHFSAL_getattrs(exthandle, extcontext, dir_attributes);
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_getattrs:
* Get attributes for the object specified by its filehandle.
*
* \param filehandle (input):
* The handle of the object to get parameters.
* \param cred (input):
* Authentication context for the operation (user,...).
* \param object_attributes (mandatory input/output):
* The retrieved attributes for the object.
* 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)
* - Another error code if an error occured.
*/
fsal_status_t LUSTREFSAL_getattrs(fsal_handle_t * p_filehandle, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_attrib_list_t * p_object_attributes /* IN/OUT */
)
{
int rc;
fsal_status_t st;
fsal_path_t fsalpath;
struct stat buffstat;
/* sanity checks.
* note : object_attributes is mandatory in FSAL_getattrs.
*/
if(!p_filehandle || !p_context || !p_object_attributes)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_getattrs);
/* get the path of the file */
st = fsal_internal_Handle2FidPath(p_context, p_filehandle, &fsalpath);
if(FSAL_IS_ERROR(st))
ReturnStatus(st, INDEX_FSAL_getattrs);
/* get file metadata */
TakeTokenFSCall();
rc = lstat(fsalpath.path, &buffstat);
ReleaseTokenFSCall();
if(rc != 0)
{
rc = errno;
if(rc == ENOENT)
Return(ERR_FSAL_STALE, rc, INDEX_FSAL_getattrs);
else
Return(posix2fsal_error(rc), rc, INDEX_FSAL_getattrs);
}
/* convert attributes */
st = posix2fsal_attributes(&buffstat, p_object_attributes);
if(FSAL_IS_ERROR(st))
{
FSAL_CLEAR_MASK(p_object_attributes->asked_attributes);
FSAL_SET_MASK(p_object_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
ReturnStatus(st, INDEX_FSAL_getattrs);
}
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_getattrs);
}
