/**
* 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);
}
/**
* 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_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);
}
/** @fn fsal_status_t
* GPFSFSAL_open(struct fsal_obj_handle *obj_hdl,
* const struct req_op_context *op_ctx,
* fsal_openflags_t openflags, int *file_desc,
* struct attrlist *fsal_attr)
*
* @brief Open a regular file for reading/writing its data content.
*
* @param obj_hdl Handle of the file to be read/modified.
* @param op_ctx Authentication context for the operation (user,...).
* @param openflags 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_desc The file descriptor to be used for FSAL_read/write ops.
*
* @return ERR_FSAL_NO_ERROR on success, error otherwise
*/
fsal_status_t
GPFSFSAL_open(struct fsal_obj_handle *obj_hdl,
const struct req_op_context *op_ctx, int posix_flags,
int *file_desc)
{
struct gpfs_fsal_obj_handle *myself;
fsal_status_t status;
struct gpfs_fsal_export *exp = container_of(op_ctx->fsal_export,
struct gpfs_fsal_export, export);
int export_fd = exp->export_fd;
/* sanity checks. */
if (!obj_hdl || !file_desc)
return fsalstat(ERR_FSAL_FAULT, 0);
myself = container_of(obj_hdl, struct gpfs_fsal_obj_handle,
obj_handle);
LogFullDebug(COMPONENT_FSAL, "posix_flags 0x%X export_fd %d",
posix_flags, export_fd);
fsal_set_credentials(op_ctx->creds);
status = fsal_internal_handle2fd(export_fd, myself->handle,
file_desc, posix_flags);
fsal_restore_ganesha_credentials();
if (FSAL_IS_ERROR(status)) {
/** Try open as root access if the above call fails,
* permission will be checked somewhere else in the code.
*/
status = fsal_internal_handle2fd(export_fd,
myself->handle,
file_desc, posix_flags);
}
return status;
}
/** @fn fsal_status_t
* GPFSFSAL_open(struct fsal_obj_handle *obj_hdl,
* const struct req_op_context *op_ctx,
* fsal_openflags_t openflags, int *file_desc,
* struct attrlist *fsal_attr, bool reopen)
*
* @brief Open a regular file for reading/writing its data content.
*
* @param obj_hdl Handle of the file to be read/modified.
* @param op_ctx Authentication context for the operation (user,...).
* @param openflags 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_desc The file descriptor to be used for FSAL_read/write ops.
*
* @return ERR_FSAL_NO_ERROR on success, error otherwise
*/
fsal_status_t
GPFSFSAL_open(struct fsal_obj_handle *obj_hdl,
const struct req_op_context *op_ctx, int posix_flags,
int *file_desc, bool reopen)
{
struct gpfs_fsal_obj_handle *myself;
struct gpfs_filesystem *gpfs_fs;
fsal_status_t status;
/* sanity checks. */
if (!obj_hdl || !file_desc)
return fsalstat(ERR_FSAL_FAULT, 0);
myself = container_of(obj_hdl, struct gpfs_fsal_obj_handle, obj_handle);
gpfs_fs = obj_hdl->fs->private_data;
LogFullDebug(COMPONENT_FSAL, "posix_flags 0x%X", posix_flags);
status = fsal_internal_handle2fd(gpfs_fs->root_fd, myself->handle,
file_desc, posix_flags, reopen);
if (FSAL_IS_ERROR(status)) {
/** In some environments, "root" is denied write access,
* so try with the request credentials if the above call
* fails.
*/
fsal_set_credentials(op_ctx->creds);
status = fsal_internal_handle2fd(gpfs_fs->root_fd,
myself->handle,
file_desc, posix_flags,
reopen);
fsal_restore_ganesha_credentials();
}
return status;
}
/**
* 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_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 XFSFSAL_open(fsal_handle_t * p_filehandle, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_openflags_t openflags, /* IN */
fsal_file_t * p_file_descriptor, /* OUT */
fsal_attrib_list_t * p_file_attributes /* [ IN/OUT ] */
)
{
int rc, errsv;
fsal_status_t status;
int fd = 0 ;
struct stat buffstat;
int posix_flags = 0;
/* 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)
{
LogEvent(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);
/* retrieve file attributes for checking access rights */
TakeTokenFSCall();
rc = fstat(fd, &buffstat);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
close(fd);
if(errsv == ENOENT)
Return(ERR_FSAL_STALE, errsv, INDEX_FSAL_open);
else
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_open);
}
#if 0
/* No required, the open would have failed if not permitted */
status =
fsal_check_access(p_context,
openflags & FSAL_O_RDONLY ? FSAL_R_OK : FSAL_W_OK,
&buffstat, NULL);
if(FSAL_IS_ERROR(status))
{
close(fd);
ReturnStatus(status, INDEX_FSAL_open);
}
#endif
TakeTokenFSCall();
((xfsfsal_file_t *)p_file_descriptor)->fd = fd;
errsv = errno;
ReleaseTokenFSCall();
/* set the read-only flag of the file descriptor */
((xfsfsal_file_t *)p_file_descriptor)->ro = openflags & FSAL_O_RDONLY;
/* output attributes */
if(p_file_attributes)
{
status = posix2fsal_attributes(&buffstat, p_file_attributes);
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(p_file_attributes->asked_attributes);
FSAL_SET_MASK(p_file_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_open);
}
fsal_status_t GPFSFSAL_rename(fsal_handle_t * p_old_parentdir_handle, /* IN */
fsal_name_t * p_old_name, /* IN */
fsal_handle_t * p_new_parentdir_handle, /* IN */
fsal_name_t * p_new_name, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_attrib_list_t * p_src_dir_attributes, /* [ IN/OUT ] */
fsal_attrib_list_t * p_tgt_dir_attributes /* [ IN/OUT ] */
)
{
int rc, errsv;
fsal_status_t status;
struct stat buffstat;
int old_parent_fd, new_parent_fd;
int src_equal_tgt = FALSE;
fsal_accessflags_t access_mask = 0;
fsal_attrib_list_t src_dir_attrs, tgt_dir_attrs;
/* sanity checks.
* note : src/tgt_dir_attributes are optional.
*/
if(!p_old_parentdir_handle || !p_new_parentdir_handle
|| !p_old_name || !p_new_name || !p_context)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_rename);
/* Get directory access path by fid */
TakeTokenFSCall();
status = fsal_internal_handle2fd(p_context, p_old_parentdir_handle,
&old_parent_fd,
O_RDONLY | O_DIRECTORY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_rename);
/* retrieve directory metadata for checking access rights */
src_dir_attrs.asked_attributes = GPFS_SUPPORTED_ATTRIBUTES;
status = GPFSFSAL_getattrs(p_old_parentdir_handle, p_context, &src_dir_attrs);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_rename);
/* optimisation : don't do the job twice if source dir = dest dir */
if(!FSAL_handlecmp(p_old_parentdir_handle, p_new_parentdir_handle, &status))
{
new_parent_fd = old_parent_fd;
src_equal_tgt = TRUE;
tgt_dir_attrs = src_dir_attrs;
}
else
{
TakeTokenFSCall();
status = fsal_internal_handle2fd(p_context, p_new_parentdir_handle,
&new_parent_fd,
O_RDONLY | O_DIRECTORY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
{
close(old_parent_fd);
ReturnStatus(status, INDEX_FSAL_rename);
}
/* retrieve destination attrs */
tgt_dir_attrs.asked_attributes = GPFS_SUPPORTED_ATTRIBUTES;
status = GPFSFSAL_getattrs(p_new_parentdir_handle, p_context, &tgt_dir_attrs);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_rename);
}
/* check access rights */
/* Set both mode and ace4 mask */
access_mask = FSAL_MODE_MASK_SET(FSAL_W_OK | FSAL_X_OK) |
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_DELETE_CHILD);
if(!p_context->export_context->fe_static_fs_info->accesscheck_support)
status = fsal_internal_testAccess(p_context, access_mask, NULL, &src_dir_attrs);
else
status = fsal_internal_access(p_context, p_old_parentdir_handle, access_mask,
&src_dir_attrs);
if(FSAL_IS_ERROR(status)) {
close(old_parent_fd);
if (!src_equal_tgt)
close(new_parent_fd);
ReturnStatus(status, INDEX_FSAL_rename);
}
if(!src_equal_tgt)
{
access_mask = FSAL_MODE_MASK_SET(FSAL_W_OK | FSAL_X_OK) |
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_ADD_FILE |
FSAL_ACE_PERM_ADD_SUBDIRECTORY);
if(!p_context->export_context->fe_static_fs_info->accesscheck_support)
status = fsal_internal_testAccess(p_context, access_mask, NULL, &tgt_dir_attrs);
else
status = fsal_internal_access(p_context, p_new_parentdir_handle, access_mask,
&tgt_dir_attrs);
if(FSAL_IS_ERROR(status)) {
close(old_parent_fd);
close(new_parent_fd);
ReturnStatus(status, INDEX_FSAL_rename);
}
}
/* build file paths */
TakeTokenFSCall();
rc = fstatat(old_parent_fd, p_old_name->name, &buffstat, AT_SYMLINK_NOFOLLOW);
errsv = errno;
ReleaseTokenFSCall();
if(rc) {
close(old_parent_fd);
if (!src_equal_tgt)
close(new_parent_fd);
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_rename);
}
/* Check sticky bits */
/* Sticky bit on the source directory => the user who wants to delete the file must own it or its parent dir */
if((fsal2unix_mode(src_dir_attrs.mode) & S_ISVTX) &&
src_dir_attrs.owner != p_context->credential.user &&
buffstat.st_uid != p_context->credential.user && p_context->credential.user != 0) {
close(old_parent_fd);
if (!src_equal_tgt)
close(new_parent_fd);
Return(ERR_FSAL_ACCESS, 0, INDEX_FSAL_rename);
}
/* Sticky bit on the target directory => the user who wants to create the file must own it or its parent dir */
if(fsal2unix_mode(tgt_dir_attrs.mode) & S_ISVTX)
{
TakeTokenFSCall();
rc = fstatat(new_parent_fd, p_new_name->name, &buffstat, AT_SYMLINK_NOFOLLOW);
errsv = errno;
ReleaseTokenFSCall();
if(rc < 0)
{
if(errsv != ENOENT)
{
close(old_parent_fd);
if (!src_equal_tgt)
close(new_parent_fd);
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_rename);
}
}
else
{
if(tgt_dir_attrs.owner != p_context->credential.user
&& buffstat.st_uid != p_context->credential.user
&& p_context->credential.user != 0)
{
close(old_parent_fd);
if (!src_equal_tgt)
close(new_parent_fd);
Return(ERR_FSAL_ACCESS, 0, INDEX_FSAL_rename);
}
}
}
/*************************************
* Rename the file on the filesystem *
*************************************/
TakeTokenFSCall();
rc = renameat(old_parent_fd, p_old_name->name, new_parent_fd, p_new_name->name);
errsv = errno;
ReleaseTokenFSCall();
close(old_parent_fd);
if (!src_equal_tgt)
close(new_parent_fd);
if(rc)
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_rename);
/***********************
* Fill the attributes *
***********************/
if(p_src_dir_attributes)
{
status = GPFSFSAL_getattrs(p_old_parentdir_handle, p_context, p_src_dir_attributes);
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(p_src_dir_attributes->asked_attributes);
FSAL_SET_MASK(p_src_dir_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
if(p_tgt_dir_attributes)
{
status = GPFSFSAL_getattrs(p_new_parentdir_handle, p_context, p_tgt_dir_attributes);
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(p_tgt_dir_attributes->asked_attributes);
FSAL_SET_MASK(p_tgt_dir_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
/* OK */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_rename);
}
/**
* 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,...).
* \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 (optional input/output):
* The 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).
* May be NULL.
*
* \return Major error codes :
* - ERR_FSAL_NO_ERROR (no error)
* - Another error code if an error occurred.
*/
fsal_status_t GPFSFSAL_create(fsal_handle_t * p_parent_directory_handle, /* IN */
fsal_name_t * p_filename, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_accessmode_t accessmode, /* IN */
fsal_handle_t * p_object_handle, /* OUT */
fsal_attrib_list_t * p_object_attributes /* [ IN/OUT ] */
)
{
int rc = 0, errsv;
int setgid_bit = 0;
fsal_status_t status;
int fd, newfd;
mode_t unix_mode;
fsal_accessflags_t access_mask = 0;
fsal_attrib_list_t parent_dir_attrs;
/* sanity checks.
* note : object_attributes is optional.
*/
if(!p_parent_directory_handle || !p_context || !p_object_handle || !p_filename)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_create);
/* convert fsal mode to unix mode. */
unix_mode = fsal2unix_mode(accessmode);
/* Apply umask */
unix_mode = unix_mode & ~global_fs_info.umask;
LogFullDebug(COMPONENT_FSAL, "Creation mode: 0%o", accessmode);
TakeTokenFSCall();
status =
fsal_internal_handle2fd(p_context, p_parent_directory_handle, &fd,
O_RDONLY | O_DIRECTORY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_create);
/* retrieve directory metadata */
parent_dir_attrs.asked_attributes = GPFS_SUPPORTED_ATTRIBUTES;
status = GPFSFSAL_getattrs(p_parent_directory_handle, p_context, &parent_dir_attrs);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_create);
/* Check the user can write in the directory, and check the setgid bit on the directory */
if(fsal2unix_mode(parent_dir_attrs.mode) & S_ISGID)
setgid_bit = 1;
/* Set both mode and ace4 mask */
access_mask = FSAL_MODE_MASK_SET(FSAL_W_OK | FSAL_X_OK) |
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_ADD_FILE);
status = fsal_internal_testAccess(p_context, access_mask, NULL, &parent_dir_attrs);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_create);
/* call to filesystem */
TakeTokenFSCall();
/* create the file.
* O_EXCL=> error if the file already exists */
newfd = openat(fd, p_filename->name, O_CREAT | O_WRONLY | O_TRUNC | O_EXCL, unix_mode);
errsv = errno;
if(newfd < 0)
{
close(fd);
ReleaseTokenFSCall();
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_create);
}
/* we no longer need the parent directory open any more */
close(fd);
/* close the file descriptor */
/***
* Previously the file handle was closed here. I don't think that
we need that, but leaving the commented out logic just in case.
rc = close(newfd);
errsv = errno;
if(rc)
{
close(fd);
ReleaseTokenFSCall();
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_create);
}
*/
/* get a handle for this new fd, doing this directly ensures no race
because we still have the fd open until the end of this function */
status = fsal_internal_fd2handle(newfd, p_object_handle);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
{
close(newfd);
ReturnStatus(status, INDEX_FSAL_create);
}
/* the file has been created */
/* chown the file to the current user */
if(p_context->credential.user != geteuid())
{
TakeTokenFSCall();
/* if the setgid_bit was set on the parent directory, do not change the group of the created file, because it's already the parentdir's group */
rc = fchown(newfd, p_context->credential.user,
setgid_bit ? -1 : (int)p_context->credential.group);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
close(newfd);
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_create);
}
}
/* if we got this far successfully, but the file close fails, we've
got a problem, possibly a disk full problem. */
close(newfd);
if(rc)
Return(posix2fsal_error(errno), errno, INDEX_FSAL_create);
/* retrieve file attributes */
if(p_object_attributes)
{
status = GPFSFSAL_getattrs(p_object_handle, p_context, p_object_attributes);
/* on error, we set a special bit in the mask. */
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(p_object_attributes->asked_attributes);
FSAL_SET_MASK(p_object_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
/* OK */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_create);
}
/**
* 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)
* - Another error code if an error occured.
*/
fsal_status_t GPFSFSAL_link(fsal_handle_t * p_target_handle, /* IN */
fsal_handle_t * p_dir_handle, /* IN */
fsal_name_t * p_link_name, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_attrib_list_t * p_attributes /* [ IN/OUT ] */
)
{
fsal_status_t status;
int srcfd, dstfd;
fsal_accessflags_t access_mask = 0;
fsal_attrib_list_t parent_dir_attrs;
/* sanity checks.
* note : attributes is optional.
*/
if(!p_target_handle || !p_dir_handle || !p_context || !p_context->export_context
|| !p_link_name || !p_link_name->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);
/* get the target handle access by fid */
TakeTokenFSCall();
status = fsal_internal_handle2fd(p_context, p_target_handle, &srcfd, O_RDONLY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_link);
/* build the destination path and check permissions on the directory */
TakeTokenFSCall();
status =
fsal_internal_handle2fd(p_context, p_dir_handle, &dstfd, O_RDONLY | O_DIRECTORY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
{
close(srcfd);
ReturnStatus(status, INDEX_FSAL_link);
}
/* retrieve target directory metadata */
parent_dir_attrs.asked_attributes = GPFS_SUPPORTED_ATTRIBUTES;
status = GPFSFSAL_getattrs(p_dir_handle, p_context, &parent_dir_attrs);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_link);
/* check permission on target directory */
/* Set both mode and ace4 mask */
access_mask = FSAL_MODE_MASK_SET(FSAL_W_OK | FSAL_X_OK) |
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_ADD_FILE);
status = fsal_internal_testAccess(p_context, access_mask, NULL, &parent_dir_attrs);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_link);
/* Create the link on the filesystem */
TakeTokenFSCall();
status = fsal_internal_link_at(srcfd, dstfd, p_link_name->name);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
{
close(srcfd);
close(dstfd);
ReturnStatus(status, INDEX_FSAL_link);
}
/* optionnaly get attributes */
if(p_attributes)
{
status = GPFSFSAL_getattrs(p_target_handle, p_context, p_attributes);
/* on error, we set a special bit in the mask. */
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(p_attributes->asked_attributes);
FSAL_SET_MASK(p_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
close(srcfd);
close(dstfd);
/* OK */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_link);
}
fsal_status_t GPFSFSAL_truncate(gpfsfsal_handle_t * p_filehandle, /* IN */
gpfsfsal_op_context_t * p_context, /* IN */
fsal_size_t length, /* IN */
gpfsfsal_file_t * file_descriptor, /* Unused in this FSAL */
fsal_attrib_list_t * p_object_attributes /* [ IN/OUT ] */
)
{
int rc, errsv;
int fd;
fsal_status_t st;
/* sanity checks.
* note : object_attributes is optional.
*/
if(!p_filehandle || !p_context)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_truncate);
/* get the path of the file and its handle */
TakeTokenFSCall();
st = fsal_internal_handle2fd(p_context, p_filehandle, &fd, O_RDWR);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(st))
ReturnStatus(st, INDEX_FSAL_truncate);
/* Executes the POSIX truncate operation */
TakeTokenFSCall();
rc = ftruncate(fd, length);
errsv = errno;
ReleaseTokenFSCall();
close(fd);
/* convert return code */
if(rc)
{
if(errsv == ENOENT)
Return(ERR_FSAL_STALE, errsv, INDEX_FSAL_truncate);
else
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_truncate);
}
/* Optionally retrieve attributes */
if(p_object_attributes)
{
fsal_status_t st;
st = GPFSFSAL_getattrs(p_filehandle, p_context, 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);
}
}
/* No error occurred */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_truncate);
}
fsal_status_t VFSFSAL_rename(fsal_handle_t * p_old_parentdir_handle, /* IN */
fsal_name_t * p_old_name, /* IN */
fsal_handle_t * p_new_parentdir_handle, /* IN */
fsal_name_t * p_new_name, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_attrib_list_t * p_src_dir_attributes, /* [ IN/OUT ] */
fsal_attrib_list_t * p_tgt_dir_attributes /* [ IN/OUT ] */
)
{
int rc, errsv;
fsal_status_t status;
struct stat old_parent_buffstat, new_parent_buffstat, buffstat;
int old_parent_fd, new_parent_fd;
int src_equal_tgt = FALSE;
uid_t user = ((vfsfsal_op_context_t *)p_context)->credential.user;
/* sanity checks.
* note : src/tgt_dir_attributes are optional.
*/
if(!p_old_parentdir_handle || !p_new_parentdir_handle
|| !p_old_name || !p_new_name || !p_context)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_rename);
/* Get directory access path by fid */
TakeTokenFSCall();
status = fsal_internal_handle2fd(p_context, p_old_parentdir_handle,
&old_parent_fd,
O_RDONLY | O_DIRECTORY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_rename);
/* retrieve directory metadata for checking access rights */
TakeTokenFSCall();
rc = fstat(old_parent_fd, &old_parent_buffstat);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
close(old_parent_fd);
if(errsv == ENOENT)
Return(ERR_FSAL_STALE, errsv, INDEX_FSAL_rename);
else
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_rename);
}
/* optimisation : don't do the job twice if source dir = dest dir */
if(!FSAL_handlecmp(p_old_parentdir_handle, p_new_parentdir_handle, &status))
{
new_parent_fd = old_parent_fd;
src_equal_tgt = TRUE;
new_parent_buffstat = old_parent_buffstat;
}
else
{
TakeTokenFSCall();
status = fsal_internal_handle2fd(p_context, p_new_parentdir_handle,
&new_parent_fd,
O_RDONLY | O_DIRECTORY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
{
close(old_parent_fd);
ReturnStatus(status, INDEX_FSAL_rename);
}
/* retrieve destination attrs */
TakeTokenFSCall();
rc = fstat(new_parent_fd, &new_parent_buffstat);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
/* close old and new parent fd */
close(old_parent_fd);
close(new_parent_fd);
if(errsv == ENOENT)
Return(ERR_FSAL_STALE, errsv, INDEX_FSAL_rename);
else
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_rename);
}
}
/* check access rights */
status = fsal_check_access(p_context, FSAL_W_OK | FSAL_X_OK,
&old_parent_buffstat,
NULL);
if(FSAL_IS_ERROR(status)) {
close(old_parent_fd);
if (!src_equal_tgt)
close(new_parent_fd);
ReturnStatus(status, INDEX_FSAL_rename);
}
if(!src_equal_tgt)
{
status = fsal_check_access(p_context, FSAL_W_OK | FSAL_X_OK,
&new_parent_buffstat,
NULL);
if(FSAL_IS_ERROR(status)) {
close(old_parent_fd);
close(new_parent_fd);
ReturnStatus(status, INDEX_FSAL_rename);
}
}
/* build file paths */
TakeTokenFSCall();
rc = fstatat(old_parent_fd, p_old_name->name, &buffstat, AT_SYMLINK_NOFOLLOW);
errsv = errno;
ReleaseTokenFSCall();
if(rc) {
close(old_parent_fd);
if (!src_equal_tgt)
close(new_parent_fd);
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_rename);
}
/* Check sticky bits */
/* Sticky bit on the source directory => the user who wants to delete the file must own it or its parent dir */
if((old_parent_buffstat.st_mode & S_ISVTX) &&
old_parent_buffstat.st_uid != user &&
buffstat.st_uid != user && user != 0) {
close(old_parent_fd);
if (!src_equal_tgt)
close(new_parent_fd);
Return(ERR_FSAL_ACCESS, 0, INDEX_FSAL_rename);
}
/* Sticky bit on the target directory => the user who wants to create the file must own it or its parent dir */
if(new_parent_buffstat.st_mode & S_ISVTX)
{
TakeTokenFSCall();
rc = fstatat(new_parent_fd, p_new_name->name, &buffstat, AT_SYMLINK_NOFOLLOW);
errsv = errno;
ReleaseTokenFSCall();
if(rc < 0)
{
if(errsv != ENOENT)
{
close(old_parent_fd);
if (!src_equal_tgt)
close(new_parent_fd);
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_rename);
}
}
else
{
if(new_parent_buffstat.st_uid != user
&& buffstat.st_uid != user
&& user != 0)
{
close(old_parent_fd);
if (!src_equal_tgt)
close(new_parent_fd);
Return(ERR_FSAL_ACCESS, 0, INDEX_FSAL_rename);
}
}
}
/*************************************
* Rename the file on the filesystem *
*************************************/
TakeTokenFSCall();
rc = renameat(old_parent_fd, p_old_name->name, new_parent_fd, p_new_name->name);
errsv = errno;
ReleaseTokenFSCall();
close(old_parent_fd);
if (!src_equal_tgt)
close(new_parent_fd);
if(rc)
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_rename);
/***********************
* Fill the attributes *
***********************/
if(p_src_dir_attributes)
{
status = VFSFSAL_getattrs(p_old_parentdir_handle, p_context, p_src_dir_attributes);
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(p_src_dir_attributes->asked_attributes);
FSAL_SET_MASK(p_src_dir_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
if(p_tgt_dir_attributes)
{
status = VFSFSAL_getattrs(p_new_parentdir_handle, p_context, p_tgt_dir_attributes);
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(p_tgt_dir_attributes->asked_attributes);
FSAL_SET_MASK(p_tgt_dir_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
/* OK */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_rename);
}
/**
* 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;
fsal_accessflags_t access_mask = 0;
fsal_attrib_list_t file_attrs;
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);
/* retrieve file attributes for checking access rights */
file_attrs.asked_attributes = GPFS_SUPPORTED_ATTRIBUTES;
status = GPFSFSAL_getattrs(p_filehandle, p_context, &file_attrs);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_open);
/* Set both mode and ace4 mask */
if(openflags & FSAL_O_RDONLY)
access_mask = FSAL_MODE_MASK_SET(FSAL_R_OK | FSAL_OWNER_OK) |
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_READ_DATA);
else
access_mask = FSAL_MODE_MASK_SET(FSAL_W_OK | FSAL_OWNER_OK) |
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_WRITE_DATA | FSAL_ACE_PERM_APPEND_DATA);
status = fsal_internal_testAccess(p_context, access_mask, NULL, &file_attrs);
if(FSAL_IS_ERROR(status))
{
close(fd);
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;
/* output attributes */
if(p_file_attributes)
*p_file_attributes = file_attrs;
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_open);
}
/**
* VFSFSAL_setattrs:
* Set 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 attrib_set (mandatory input):
* The attributes to be set for the object.
* It defines the attributes that the caller
* wants to set and their values.
* \param object_attributes (optionnal input/output):
* The post operation 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).
* May be NULL.
*
* \return Major error codes :
* - ERR_FSAL_NO_ERROR (no error)
* - Another error code if an error occured.
*/
fsal_status_t VFSFSAL_setattrs(fsal_handle_t * p_filehandle, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_attrib_list_t * p_attrib_set, /* IN */
fsal_attrib_list_t * p_object_attributes /* [ IN/OUT ] */
)
{
vfsfsal_op_context_t * vfs_context = (vfsfsal_op_context_t *) p_context;
int rc, errsv;
unsigned int i;
fsal_status_t status;
fsal_attrib_list_t attrs;
int fd;
struct stat buffstat;
/* sanity checks.
* note : object_attributes is optional.
*/
if(!p_filehandle || !p_context || !p_attrib_set)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_setattrs);
/* local copy of attributes */
attrs = *p_attrib_set;
/* It does not make sense to setattr on a symlink */
/* if(p_filehandle->type == DT_LNK)
return fsal_internal_setattrs_symlink(p_filehandle, p_context, p_attrib_set,
p_object_attributes);
*/
/* First, check that FSAL attributes changes are allowed. */
/* Is it allowed to change times ? */
if(!global_fs_info.cansettime)
{
if(attrs.asked_attributes
& (FSAL_ATTR_ATIME | FSAL_ATTR_CREATION | FSAL_ATTR_CTIME | FSAL_ATTR_MTIME))
{
/* handled as an unsettable attribute. */
Return(ERR_FSAL_INVAL, 0, INDEX_FSAL_setattrs);
}
}
/* apply umask, if mode attribute is to be changed */
if(FSAL_TEST_MASK(attrs.asked_attributes, FSAL_ATTR_MODE))
{
attrs.mode &= (~global_fs_info.umask);
}
TakeTokenFSCall();
status = fsal_internal_handle2fd(p_context, p_filehandle, &fd, O_RDONLY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
{
/* Symbolic link are handled here, they are to be opened as O_PATH */
if( status.minor == ELOOP )
{
if(p_object_attributes)
{
status = VFSFSAL_getattrs(p_filehandle, p_context, p_object_attributes);
/* on error, we set a special bit in the mask. */
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(p_object_attributes->asked_attributes);
FSAL_SET_MASK(p_object_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_setattrs);
}
ReturnStatus( status, INDEX_FSAL_setattrs);
}
/* get current attributes */
TakeTokenFSCall();
rc = fstat(fd, &buffstat);
errsv = errno;
ReleaseTokenFSCall();
if(rc != 0)
{
close(fd);
if(errsv == ENOENT)
Return(ERR_FSAL_STALE, errsv, INDEX_FSAL_setattrs);
else
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_setattrs);
}
/***********
* CHMOD *
***********/
if(FSAL_TEST_MASK(attrs.asked_attributes, FSAL_ATTR_MODE))
{
/* The POSIX chmod call don't affect the symlink object, but
* the entry it points to. So we must ignore it.
*/
if(!S_ISLNK(buffstat.st_mode))
{
/* For modifying mode, user must be root or the owner */
if((vfs_context->credential.user != 0)
&& (vfs_context->credential.user != buffstat.st_uid))
{
LogFullDebug(COMPONENT_FSAL,
"Permission denied for CHMOD opeartion: current owner=%d, credential=%d",
buffstat.st_uid, vfs_context->credential.user);
close(fd);
Return(ERR_FSAL_PERM, 0, INDEX_FSAL_setattrs);
}
TakeTokenFSCall();
rc = fchmod(fd, fsal2unix_mode(attrs.mode));
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
close(fd);
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_setattrs);
}
}
}
/***********
* CHOWN *
***********/
/* Only root can change uid and A normal user must be in the group he wants to set */
if(FSAL_TEST_MASK(attrs.asked_attributes, FSAL_ATTR_OWNER))
{
/* For modifying owner, user must be root or current owner==wanted==client */
if((vfs_context->credential.user != 0) &&
((vfs_context->credential.user != buffstat.st_uid) ||
(vfs_context->credential.user != attrs.owner)))
{
LogFullDebug(COMPONENT_FSAL,
"Permission denied for CHOWN opeartion: current owner=%d, credential=%d, new owner=%d",
buffstat.st_uid, vfs_context->credential.user, attrs.owner);
close(fd);
Return(ERR_FSAL_PERM, 0, INDEX_FSAL_setattrs);
}
}
if(FSAL_TEST_MASK(attrs.asked_attributes, FSAL_ATTR_GROUP))
{
/* For modifying group, user must be root or current owner */
if((vfs_context->credential.user != 0)
&& (vfs_context->credential.user != buffstat.st_uid))
{
close(fd);
Return(ERR_FSAL_PERM, 0, INDEX_FSAL_setattrs);
}
int in_grp = 0;
/* set in_grp */
if(vfs_context->credential.group == attrs.group)
in_grp = 1;
else
for(i = 0; i < vfs_context->credential.nbgroups; i++)
{
if((in_grp = (attrs.group == vfs_context->credential.alt_groups[i])))
break;
}
/* it must also be in target group */
if(vfs_context->credential.user != 0 && !in_grp)
{
LogFullDebug(COMPONENT_FSAL,
"Permission denied for CHOWN operation: current group=%d, credential=%d, new group=%d",
buffstat.st_gid, vfs_context->credential.group, attrs.group);
close(fd);
Return(ERR_FSAL_PERM, 0, INDEX_FSAL_setattrs);
}
}
if(FSAL_TEST_MASK(attrs.asked_attributes, FSAL_ATTR_OWNER | FSAL_ATTR_GROUP))
{
/* LogFullDebug(COMPONENT_FSAL, "Performing chown(%s, %d,%d)",
fsalpath.path, FSAL_TEST_MASK(attrs.asked_attributes,
FSAL_ATTR_OWNER) ? (int)attrs.owner
: -1, FSAL_TEST_MASK(attrs.asked_attributes,
FSAL_ATTR_GROUP) ? (int)attrs.group : -1);*/
TakeTokenFSCall();
rc = fchown(fd,
FSAL_TEST_MASK(attrs.asked_attributes,
FSAL_ATTR_OWNER) ? (int)attrs.owner : -1,
FSAL_TEST_MASK(attrs.asked_attributes,
FSAL_ATTR_GROUP) ? (int)attrs.group : -1);
ReleaseTokenFSCall();
if(rc)
{
close(fd);
Return(posix2fsal_error(errno), errno, INDEX_FSAL_setattrs);
}
}
/***********
* UTIME *
***********/
/* user must be the owner or have read access to modify 'atime' */
if(FSAL_TEST_MASK(attrs.asked_attributes, FSAL_ATTR_ATIME)
&& (vfs_context->credential.user != 0)
&& (vfs_context->credential.user != buffstat.st_uid)
&& ((status = fsal_check_access(p_context, FSAL_R_OK, &buffstat, NULL)).major
!= ERR_FSAL_NO_ERROR))
{
close(fd);
ReturnStatus(status, INDEX_FSAL_setattrs);
}
/* user must be the owner or have write access to modify 'mtime' */
if(FSAL_TEST_MASK(attrs.asked_attributes, FSAL_ATTR_MTIME)
&& (vfs_context->credential.user != 0)
&& (vfs_context->credential.user != buffstat.st_uid)
&& ((status = fsal_check_access(p_context, FSAL_W_OK, &buffstat, NULL)).major
!= ERR_FSAL_NO_ERROR))
{
close(fd);
ReturnStatus(status, INDEX_FSAL_setattrs);
}
if(FSAL_TEST_MASK(attrs.asked_attributes, FSAL_ATTR_ATIME | FSAL_ATTR_MTIME))
{
struct timeval timebuf[2];
/* Atime */
timebuf[0].tv_sec =
(FSAL_TEST_MASK(attrs.asked_attributes, FSAL_ATTR_ATIME) ? (time_t) attrs.
atime.seconds : buffstat.st_atime);
timebuf[0].tv_usec = 0;
/* Mtime */
timebuf[1].tv_sec =
(FSAL_TEST_MASK(attrs.asked_attributes, FSAL_ATTR_MTIME) ? (time_t) attrs.
mtime.seconds : buffstat.st_mtime);
timebuf[1].tv_usec = 0;
TakeTokenFSCall();
rc = futimes(fd, timebuf);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
close(fd);
Return(posix2fsal_error(errno), errno, INDEX_FSAL_setattrs);
}
}
/* Optionaly fills output attributes. */
if(p_object_attributes)
{
status = VFSFSAL_getattrs(p_filehandle, p_context, p_object_attributes);
/* on error, we set a special bit in the mask. */
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(p_object_attributes->asked_attributes);
FSAL_SET_MASK(p_object_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
close(fd);
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_setattrs);
}
/**
* FSAL_lookup :
* Looks up for an object into a directory.
*
* Note : if parent handle and filename are NULL,
* this retrieves root's handle.
*
* \param parent_directory_handle (input)
* Handle of the parent directory to search the object in.
* \param filename (input)
* The name of the object to find.
* \param p_context (input)
* Authentication context for the operation (user,...).
* \param object_handle (output)
* The handle of the object corresponding to filename.
* \param object_attributes (optional input/output)
* Pointer to the attributes of the object we found.
* 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 - ERR_FSAL_NO_ERROR, if no error.
* - Another error code else.
*
*/
fsal_status_t XFSFSAL_lookup(fsal_handle_t * parent_handle, /* IN */
fsal_name_t * p_filename, /* IN */
fsal_op_context_t * context, /* IN */
fsal_handle_t * object_handle, /* OUT */
fsal_attrib_list_t * p_object_attributes /* [ IN/OUT ] */
)
{
xfsfsal_handle_t * p_parent_directory_handle = (xfsfsal_handle_t *)parent_handle;
xfsfsal_op_context_t * p_context = (xfsfsal_op_context_t *)context;
xfsfsal_handle_t * p_object_handle = (xfsfsal_handle_t *)object_handle;
int rc = 0 , errsv = 0 ;
fsal_status_t status;
struct stat buffstat;
int parentfd;
/* sanity checks
* note : object_attributes is optionnal
* parent_directory_handle may be null for getting FS root.
*/
if(!p_object_handle || !p_context)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_lookup);
/* filename AND parent handle are NULL => lookup "/" */
if((p_parent_directory_handle && !p_filename)
|| (!p_parent_directory_handle && p_filename))
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_lookup);
/* get information about root */
if(!p_parent_directory_handle)
{
/* get handle for the mount point */
memcpy(p_object_handle->data.handle_val, p_context->export_context->mnt_handle_val,
p_context->export_context->mnt_handle_len);
p_object_handle->data.handle_len = p_context->export_context->mnt_handle_len;
/* get attributes, if asked */
if(p_object_attributes)
{
status = XFSFSAL_getattrs(p_object_handle, p_context, p_object_attributes);
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(p_object_attributes->asked_attributes);
FSAL_SET_MASK(p_object_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
/* Done */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_lookup);
}
/* retrieve directory attributes */
TakeTokenFSCall();
status =
fsal_internal_handle2fd(context, parent_handle, &parentfd, O_RDONLY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_lookup);
/* get directory metadata */
TakeTokenFSCall();
rc = fstat(parentfd, &buffstat);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
close( parentfd ) ;
if(errsv == ENOENT)
Return(ERR_FSAL_STALE, errsv, INDEX_FSAL_lookup);
else
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_lookup);
}
/* Be careful about junction crossing, symlinks, hardlinks,... */
switch (posix2fsal_type(buffstat.st_mode))
{
case FSAL_TYPE_DIR:
// OK
break;
case FSAL_TYPE_JUNCTION:
close( parentfd ) ;
// This is a junction
Return(ERR_FSAL_XDEV, 0, INDEX_FSAL_lookup);
case FSAL_TYPE_FILE:
case FSAL_TYPE_LNK:
case FSAL_TYPE_XATTR:
close( parentfd ) ;
// not a directory
Return(ERR_FSAL_NOTDIR, 0, INDEX_FSAL_lookup);
default:
close( parentfd ) ;
Return(ERR_FSAL_SERVERFAULT, 0, INDEX_FSAL_lookup);
}
LogFullDebug(COMPONENT_FSAL, "lookup of inode=%"PRIu64"/%s", buffstat.st_ino,
p_filename->name);
/* check rights to enter into the directory */
status = fsal_check_access(context, FSAL_X_OK, &buffstat, NULL);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_lookup);
status = xfsfsal_stat_by_name(context, parentfd, p_filename->name,
object_handle, p_object_attributes);
close(parentfd);
ReturnStatus(status, INDEX_FSAL_lookup);
}
/**
* 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)
* - Another error code if an error occured.
*/
fsal_status_t XFSFSAL_mkdir(xfsfsal_handle_t * p_parent_directory_handle, /* IN */
fsal_name_t * p_dirname, /* IN */
xfsfsal_op_context_t * p_context, /* IN */
fsal_accessmode_t accessmode, /* IN */
xfsfsal_handle_t * p_object_handle, /* OUT */
fsal_attrib_list_t * p_object_attributes /* [ IN/OUT ] */
)
{
int rc, errsv;
int setgid_bit = 0;
struct stat buffstat;
mode_t unix_mode;
fsal_status_t status;
int fd, newfd;
/* sanity checks.
* note : object_attributes is optional.
*/
if(!p_parent_directory_handle || !p_context || !p_object_handle || !p_dirname)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_mkdir);
/* convert FSAL mode to HPSS mode. */
unix_mode = fsal2unix_mode(accessmode);
/* Apply umask */
unix_mode = unix_mode & ~global_fs_info.umask;
TakeTokenFSCall();
status =
fsal_internal_handle2fd(p_context, p_parent_directory_handle, &fd, O_DIRECTORY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_mkdir);
/* get directory metadata */
TakeTokenFSCall();
rc = fstat(fd, &buffstat);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
close(fd);
if(errsv == ENOENT)
Return(ERR_FSAL_STALE, errsv, INDEX_FSAL_create);
else
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_create);
}
/* Check the user can write in the directory, and check the setgid bit on the directory */
if(buffstat.st_mode & S_ISGID)
setgid_bit = 1;
status = fsal_internal_testAccess(p_context, FSAL_W_OK | FSAL_X_OK, &buffstat, NULL);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_mkdir);
/* build new entry path */
/* creates the directory and get its handle */
TakeTokenFSCall();
rc = mkdirat(fd, p_dirname->name, unix_mode);
errsv = errno;
if(rc)
{
close(fd);
ReleaseTokenFSCall();
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_mkdir);
}
/* get the new handle */
if((newfd = openat(fd, p_dirname->name, O_RDONLY | O_DIRECTORY, 0600)) < 0)
{
errsv = errno;
close(fd);
ReleaseTokenFSCall();
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_mkdir);
}
status = fsal_internal_fd2handle(p_context, newfd, p_object_handle);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
{
close(fd);
close(newfd);
ReturnStatus(status, INDEX_FSAL_mkdir);
}
/* the directory has been created */
/* chown the file to the current user/group */
if(p_context->credential.user != geteuid())
{
TakeTokenFSCall();
/* if the setgid_bit was set on the parent directory, do not change the group of the created file, because it's already the parentdir's group */
rc = fchown(newfd, p_context->credential.user,
setgid_bit ? -1 : (int)p_context->credential.group);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
close(fd);
close(newfd);
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_mkdir);
}
}
close(fd);
close(newfd);
/* retrieve file attributes */
if(p_object_attributes)
{
status = XFSFSAL_getattrs(p_object_handle, p_context, p_object_attributes);
/* on error, we set a special bit in the mask. */
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(p_object_attributes->asked_attributes);
FSAL_SET_MASK(p_object_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
/* OK */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_mkdir);
}
fsal_status_t XFSFSAL_unlink(fsal_handle_t * p_parent_directory_handle, /* IN */
fsal_name_t * p_object_name, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_attrib_list_t * p_parent_directory_attributes /* [IN/OUT ] */
)
{
fsal_status_t status;
int rc, errsv;
struct stat buffstat, buffstat_parent;
int fd;
/* sanity checks. */
if(!p_parent_directory_handle || !p_context || !p_object_name)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_unlink);
/* build the FID path */
TakeTokenFSCall();
status =
fsal_internal_handle2fd(p_context, p_parent_directory_handle, &fd, O_DIRECTORY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_unlink);
/* get directory metadata */
TakeTokenFSCall();
rc = fstat(fd, &buffstat_parent);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
close(fd);
if(errsv == ENOENT)
Return(ERR_FSAL_STALE, errsv, INDEX_FSAL_unlink);
else
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_unlink);
}
/* build the child path */
/* get file metadata */
TakeTokenFSCall();
rc = fstatat(fd, p_object_name->name, &buffstat, AT_SYMLINK_NOFOLLOW);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
close(fd);
Return(posix2fsal_error(errno), errno, INDEX_FSAL_unlink);
}
/* check access rights */
/* Sticky bit on the directory => the user who wants to delete the file must own it or its parent dir */
if((buffstat_parent.st_mode & S_ISVTX)
&& buffstat_parent.st_uid != ((xfsfsal_op_context_t *)p_context)->credential.user
&& buffstat.st_uid != ((xfsfsal_op_context_t *)p_context)->credential.user
&& ((xfsfsal_op_context_t *)p_context)->credential.user != 0)
{
close(fd);
Return(ERR_FSAL_ACCESS, 0, INDEX_FSAL_unlink);
}
/* client must be able to lookup the parent directory and modify it */
status =
fsal_internal_testAccess(p_context, FSAL_W_OK | FSAL_X_OK, &buffstat_parent, NULL);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_unlink);
/******************************
* DELETE FROM THE FILESYSTEM *
******************************/
TakeTokenFSCall();
/* If the object to delete is a directory, use 'rmdir' to delete the object, else use 'unlink' */
rc = (S_ISDIR(buffstat.st_mode)) ? unlinkat(fd, p_object_name->name,
AT_REMOVEDIR) : unlinkat(fd,
p_object_name->name,
0);
errsv = errno;
ReleaseTokenFSCall();
close(fd);
if(rc)
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_unlink);
/***********************
* FILL THE ATTRIBUTES *
***********************/
if(p_parent_directory_attributes)
{
status =
XFSFSAL_getattrs(p_parent_directory_handle, p_context,
p_parent_directory_attributes);
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(p_parent_directory_attributes->asked_attributes);
FSAL_SET_MASK(p_parent_directory_attributes->asked_attributes,
FSAL_ATTR_RDATTR_ERR);
}
}
/* OK */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_unlink);
}
/**
* 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 VFSFSAL_opendir(vfsfsal_handle_t * p_dir_handle, /* IN */
vfsfsal_op_context_t * p_context, /* IN */
vfsfsal_dir_t * p_dir_descriptor, /* OUT */
fsal_attrib_list_t * p_dir_attributes /* [ IN/OUT ] */
)
{
int rc, errsv;
fsal_status_t status;
struct stat buffstat;
/* 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 */
TakeTokenFSCall();
rc = fstat(p_dir_descriptor->fd, &buffstat);
ReleaseTokenFSCall();
if(rc != 0)
{
close(p_dir_descriptor->fd);
if(rc == ENOENT)
Return(ERR_FSAL_STALE, errsv, INDEX_FSAL_opendir);
else
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_opendir);
}
/* Test access rights for this directory */
status = fsal_internal_testAccess(p_context, FSAL_R_OK, &buffstat, NULL);
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(vfsfsal_op_context_t));
memcpy(&(p_dir_descriptor->handle), p_dir_handle, sizeof(vfsfsal_handle_t));
if(p_dir_attributes)
{
status = posix2fsal_attributes(&buffstat, p_dir_attributes);
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(p_dir_attributes->asked_attributes);
FSAL_SET_MASK(p_dir_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
p_dir_descriptor->dir_offset = 0;
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_opendir);
}
/**
* FSAL_lookup :
* Looks up for an object into a directory.
*
* Note : if parent handle and filename are NULL,
* this retrieves root's handle.
*
* \param parent_directory_handle (input)
* Handle of the parent directory to search the object in.
* \param filename (input)
* The name of the object to find.
* \param p_context (input)
* Authentication context for the operation (user,...).
* \param object_handle (output)
* The handle of the object corresponding to filename.
* \param object_attributes (optional input/output)
* Pointer to the attributes of the object we found.
* 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).
* It can be NULL (increases performances).
*
* \return - ERR_FSAL_NO_ERROR, if no error.
* - Another error code else.
*
*/
fsal_status_t GPFSFSAL_lookup(fsal_handle_t * p_parent_directory_handle, /* IN */
fsal_name_t * p_filename, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_handle_t * object_handle, /* OUT */
fsal_attrib_list_t * p_object_attributes /* [ IN/OUT ] */
)
{
fsal_status_t status;
int parentfd;
fsal_accessflags_t access_mask = 0;
fsal_attrib_list_t parent_dir_attrs;
gpfsfsal_handle_t *p_object_handle = (gpfsfsal_handle_t *)object_handle;
/* sanity checks
* note : object_attributes is optional
* parent_directory_handle may be null for getting FS root.
*/
if(!p_object_handle || !p_context)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_lookup);
/* filename AND parent handle are NULL => lookup "/" */
if((p_parent_directory_handle && !p_filename)
|| (!p_parent_directory_handle && p_filename))
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_lookup);
/* get information about root */
if(!p_parent_directory_handle)
{
gpfsfsal_handle_t *root_handle = &((gpfsfsal_op_context_t *)p_context)->export_context->mount_root_handle;
/* get handle for the mount point */
memcpy(p_object_handle->data.handle.f_handle,
root_handle->data.handle.f_handle,
sizeof(root_handle->data.handle.handle_size));
p_object_handle->data.handle.handle_size = root_handle->data.handle.handle_size;
p_object_handle->data.handle.handle_key_size = root_handle->data.handle.handle_key_size;
/* get attributes, if asked */
if(p_object_attributes)
{
status = GPFSFSAL_getattrs(object_handle, p_context, p_object_attributes);
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(p_object_attributes->asked_attributes);
FSAL_SET_MASK(p_object_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
/* Done */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_lookup);
}
/* retrieve directory attributes */
TakeTokenFSCall();
status =
fsal_internal_handle2fd(p_context, p_parent_directory_handle, &parentfd, O_RDONLY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_lookup);
/* get directory metadata */
parent_dir_attrs.asked_attributes = GPFS_SUPPORTED_ATTRIBUTES;
status = GPFSFSAL_getattrs(p_parent_directory_handle, p_context, &parent_dir_attrs);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_lookup);
/* Be careful about junction crossing, symlinks, hardlinks,... */
switch (parent_dir_attrs.type)
{
case FSAL_TYPE_DIR:
// OK
break;
case FSAL_TYPE_JUNCTION:
// This is a junction
Return(ERR_FSAL_XDEV, 0, INDEX_FSAL_lookup);
case FSAL_TYPE_FILE:
case FSAL_TYPE_LNK:
case FSAL_TYPE_XATTR:
// not a directory
Return(ERR_FSAL_NOTDIR, 0, INDEX_FSAL_lookup);
default:
Return(ERR_FSAL_SERVERFAULT, 0, INDEX_FSAL_lookup);
}
// LogFullDebug(COMPONENT_FSAL,
// "lookup of %#llx:%#x:%#x/%s", p_parent_directory_handle->seq,
// p_parent_directory_handle->oid, p_parent_directory_handle->ver,
// p_filename->name);
/* check rights to enter into the directory */
/* Set both mode and ace4 mask */
access_mask = FSAL_MODE_MASK_SET(FSAL_R_OK | FSAL_X_OK) |
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_LIST_DIR);
if(!p_context->export_context->fe_static_fs_info->accesscheck_support)
status = fsal_internal_testAccess(p_context, access_mask, NULL, &parent_dir_attrs);
else
status = fsal_internal_access(p_context, p_parent_directory_handle, access_mask,
&parent_dir_attrs);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_lookup);
/* get file handle, it it exists */
/* This might be a race, but it's the best we can currently do */
status = fsal_internal_get_handle_at(parentfd, p_filename, object_handle);
close(parentfd);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_lookup);
/* get object attributes */
if(p_object_attributes)
{
status = GPFSFSAL_getattrs(object_handle, p_context, p_object_attributes);
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(p_object_attributes->asked_attributes);
FSAL_SET_MASK(p_object_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
/* lookup complete ! */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_lookup);
}
/**
* 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)
* - Another error code if an error occured.
*/
fsal_status_t XFSFSAL_link(fsal_handle_t * p_target_handle, /* IN */
fsal_handle_t * p_dir_handle, /* IN */
fsal_name_t * p_link_name, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_attrib_list_t * p_attributes /* [ IN/OUT ] */
)
{
int rc, errsv;
fsal_status_t status;
int srcfd, dstfd;
struct stat buffstat_dir;
/* sanity checks.
* note : attributes is optional.
*/
if(!p_target_handle || !p_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);
/* LogFullDebug(COMPONENT_FSAL, "linking %#llx:%#x:%#x to %#llx:%#x:%#x/%s", */
/* get the target handle access by fid */
TakeTokenFSCall();
status = fsal_internal_handle2fd(p_context, p_target_handle, &srcfd, O_DIRECTORY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_link);
/* build the destination path and check permissions on the directory */
TakeTokenFSCall();
status = fsal_internal_handle2fd(p_context, p_dir_handle, &dstfd, O_DIRECTORY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
{
close(srcfd);
ReturnStatus(status, INDEX_FSAL_link);
}
/* retrieve target directory metadata */
TakeTokenFSCall();
rc = fstat(dstfd, &buffstat_dir);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
close(srcfd);
close(dstfd);
if(errsv == ENOENT)
Return(ERR_FSAL_STALE, errsv, INDEX_FSAL_link);
else
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_link);
}
/* check permission on target directory */
status =
fsal_internal_testAccess(p_context, FSAL_W_OK | FSAL_X_OK, &buffstat_dir, NULL);
if(FSAL_IS_ERROR(status))
{
close(srcfd), close(dstfd);
ReturnStatus(status, INDEX_FSAL_link);
}
/* Create the link on the filesystem */
TakeTokenFSCall();
rc = linkat2(srcfd, dstfd, p_link_name->name);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
close(srcfd), close(dstfd);
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_link);
}
/* optionnaly get attributes */
if(p_attributes)
{
status = XFSFSAL_getattrs(p_target_handle, p_context, p_attributes);
/* on error, we set a special bit in the mask. */
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(p_attributes->asked_attributes);
FSAL_SET_MASK(p_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
/* OK */
close(srcfd);
close(dstfd);
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_link);
}
/**
* 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)
* - Another error code if an error occured.
*/
fsal_status_t GPFSFSAL_mkdir(fsal_handle_t * p_parent_directory_handle, /* IN */
fsal_name_t * p_dirname, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_accessmode_t accessmode, /* IN */
fsal_handle_t * p_object_handle, /* OUT */
fsal_attrib_list_t * p_object_attributes /* [ IN/OUT ] */
)
{
int rc, errsv;
int setgid_bit = 0;
mode_t unix_mode;
fsal_status_t status;
int fd, newfd;
fsal_accessflags_t access_mask = 0;
fsal_attrib_list_t parent_dir_attrs;
/* sanity checks.
* note : object_attributes is optional.
*/
if(!p_parent_directory_handle || !p_context || !p_object_handle || !p_dirname)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_mkdir);
/* convert FSAL mode to unix mode. */
unix_mode = fsal2unix_mode(accessmode);
/* Apply umask */
unix_mode = unix_mode & ~global_fs_info.umask;
TakeTokenFSCall();
status = fsal_internal_handle2fd(p_context, p_parent_directory_handle, &fd, O_RDONLY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_mkdir);
/* get directory metadata */
parent_dir_attrs.asked_attributes = GPFS_SUPPORTED_ATTRIBUTES;
status = GPFSFSAL_getattrs(p_parent_directory_handle, p_context, &parent_dir_attrs);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_create);
/* Check the user can write in the directory, and check the setgid bit on the directory */
if(fsal2unix_mode(parent_dir_attrs.mode) & S_ISGID)
setgid_bit = 1;
/* Set both mode and ace4 mask */
access_mask = FSAL_MODE_MASK_SET(FSAL_W_OK | FSAL_X_OK) |
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_ADD_SUBDIRECTORY);
status = fsal_internal_testAccess(p_context, access_mask, NULL, &parent_dir_attrs);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_mkdir);
/* build new entry path */
/* creates the directory and get its handle */
TakeTokenFSCall();
rc = mkdirat(fd, p_dirname->name, unix_mode);
errsv = errno;
if(rc)
{
close(fd);
ReleaseTokenFSCall();
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_mkdir);
}
ReleaseTokenFSCall();
/****
* There is a race here between mkdir creation and the open, not
* sure there is any way to close it in practice.
*/
/* get the new handle */
TakeTokenFSCall();
status = fsal_internal_get_handle_at(fd, p_dirname, p_object_handle);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
{
close(fd);
ReturnStatus(status, INDEX_FSAL_mkdir);
}
TakeTokenFSCall();
status =
fsal_internal_handle2fd_at(fd, p_object_handle, &newfd, O_RDONLY | O_DIRECTORY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
{
close(fd);
ReturnStatus(status, INDEX_FSAL_mkdir);
}
/* the directory has been created */
/* chown the dir to the current user/group */
if(p_context->credential.user != geteuid())
{
TakeTokenFSCall();
/* if the setgid_bit was set on the parent directory, do not change the group of the created file, because it's already the parentdir's group */
rc = fchown(newfd, p_context->credential.user,
setgid_bit ? -1 : (int)p_context->credential.group);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
close(fd);
close(newfd);
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_mkdir);
}
}
close(fd);
close(newfd);
/* retrieve file attributes */
if(p_object_attributes)
{
status = GPFSFSAL_getattrs(p_object_handle, p_context, p_object_attributes);
/* on error, we set a special bit in the mask. */
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(p_object_attributes->asked_attributes);
FSAL_SET_MASK(p_object_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
/* OK */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_mkdir);
}
/**
* PTFSAL_setattrs:
* Set 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 attrib_set (mandatory input):
* The attributes to be set for the object.
* It defines the attributes that the caller
* wants to set and their values.
* \param object_attributes (optionnal input/output):
* The post operation 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).
* May be NULL.
*
* \return Major error codes :
* - ERR_FSAL_NO_ERROR (no error)
* - Another error code if an error occured.
*/
fsal_status_t
PTFSAL_setattrs(fsal_handle_t * p_filehandle, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_attrib_list_t * p_attrib_set, /* IN */
fsal_attrib_list_t * p_object_attributes /* [ IN/OUT ] */)
{
unsigned int i;
fsal_status_t status;
ptfsal_xstat_t buffxstat;
fsal_accessflags_t access_mask = 0;
fsal_attrib_list_t wanted_attrs, current_attrs;
mode_t st_mode_in_cache = 0;
char fsi_name[PATH_MAX];
int rc;
int fd;
FSI_TRACE(FSI_DEBUG, "Begin-----------------------------------------\n");
/* sanity checks.
* note : object_attributes is optional.
*/
if (!p_filehandle || !p_context || !p_attrib_set) {
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_setattrs);
}
/* local copy of attributes */
wanted_attrs = *p_attrib_set;
/* First, check that FSAL attributes changes are allowed. */
if (!global_fs_info.cansettime) {
if (wanted_attrs.asked_attributes
& (FSAL_ATTR_ATIME | FSAL_ATTR_CREATION | FSAL_ATTR_CTIME
| FSAL_ATTR_MTIME)) {
/* handled as an unsettable attribute. */
Return(ERR_FSAL_INVAL, 0, INDEX_FSAL_setattrs);
}
}
/* apply umask, if mode attribute is to be changed */
if (FSAL_TEST_MASK(wanted_attrs.asked_attributes, FSAL_ATTR_MODE)) {
wanted_attrs.mode &= (~global_fs_info.umask);
}
/* get current attributes */
current_attrs.asked_attributes = PTFS_SUPPORTED_ATTRIBUTES;
status = PTFSAL_getattrs(p_filehandle, p_context, ¤t_attrs);
if (FSAL_IS_ERROR(status)) {
FSAL_CLEAR_MASK(p_object_attributes->asked_attributes);
FSAL_SET_MASK(p_object_attributes->asked_attributes,
FSAL_ATTR_RDATTR_ERR);
ReturnStatus(status, INDEX_FSAL_setattrs);
}
/**************
* TRUNCATE *
**************/
if(FSAL_TEST_MASK(wanted_attrs.asked_attributes, FSAL_ATTR_SIZE)) {
status = fsal_internal_handle2fd(p_context, p_filehandle, &fd, O_RDONLY);
if (FSAL_IS_ERROR(status)) {
ReturnStatus(status, INDEX_FSAL_setattrs);
}
status = PTFSAL_truncate( p_filehandle,
p_context,
wanted_attrs.filesize,
&fd,
p_object_attributes);
if (FSAL_IS_ERROR(status)) {
ReturnStatus(status, INDEX_FSAL_setattrs);
}
}
/***********
* CHMOD *
***********/
if (FSAL_TEST_MASK(wanted_attrs.asked_attributes, FSAL_ATTR_MODE)) {
FSI_TRACE(FSI_DEBUG, "Begin chmod------------------\n");
/* The POSIX chmod call don't affect the symlink object, but
* the entry it points to. So we must ignore it.
*/
if (current_attrs.type != FSAL_TYPE_LNK) {
/* For modifying mode, user must be root or the owner */
if ((p_context->credential.user != 0)
&& (p_context->credential.user != current_attrs.owner)) {
FSI_TRACE(FSI_DEBUG,
"Permission denied for CHMOD opeartion: "
"current owner=%d, credential=%d",
current_attrs.owner,
p_context->credential.user);
Return(ERR_FSAL_PERM, 0, INDEX_FSAL_setattrs);
}
#ifdef _USE_NFS4_ACL
/* Check permission using ACL. */
access_mask = FSAL_MODE_MASK_SET(0) | /* Dummy. */
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_WRITE_ATTR);
if (!p_context->export_context->fe_static_fs_info->accesscheck_support)
status = fsal_internal_testAccess(p_context, access_mask, NULL,
¤t_attrs);
else
status = fsal_internal_access(p_context, p_filehandle, access_mask,
¤t_attrs);
if (FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_setattrs);
#endif
/* Fill wanted mode. */
buffxstat.buffstat.st_mode = fsal2unix_mode(wanted_attrs.mode);
FSI_TRACE(FSI_DEBUG,
"current mode = %o, new mode = %o",
fsal2unix_mode(current_attrs.mode),
buffxstat.buffstat.st_mode);
rc = fsi_get_name_from_handle(p_context,
p_filehandle->data.handle.f_handle,
fsi_name,
NULL);
if (rc < 0) {
FSI_TRACE(FSI_ERR,
"Failed to convert file handle back to filename" );
FSI_TRACE(FSI_DEBUG, "Handle to name failed for hanlde %s",
p_filehandle->data.handle.f_handle);
Return (ERR_FSAL_BADHANDLE, 0, INDEX_FSAL_setattrs);
}
FSI_TRACE(FSI_DEBUG, "Handle to name: %s for handle %s",
fsi_name, p_filehandle->data.handle.f_handle);
rc = ptfsal_chmod(p_context, fsi_name,
buffxstat.buffstat.st_mode);
if (rc == -1) {
FSI_TRACE(FSI_ERR, "chmod FAILED");
Return (ERR_FSAL_PERM, 0, INDEX_FSAL_setattrs);
} else {
st_mode_in_cache = (buffxstat.buffstat.st_mode
| fsal_type2unix(current_attrs.type));
fsi_update_cache_stat(fsi_name,
st_mode_in_cache,
p_context->export_context->pt_export_id);
FSI_TRACE(FSI_INFO,
"Chmod SUCCEED with st_mode in cache being %o",
st_mode_in_cache);
}
}
FSI_TRACE(FSI_DEBUG, "End chmod-------------------\n");
}
/***********
* CHOWN *
***********/
FSI_TRACE(FSI_DEBUG, "Begin chown------------------------------\n");
/* Only root can change uid and A normal user must be in the group
* he wants to set
*/
if (FSAL_TEST_MASK(wanted_attrs.asked_attributes, FSAL_ATTR_OWNER)) {
/* For modifying owner, user must be root or current
* owner==wanted==client
*/
if ((p_context->credential.user != 0) &&
((p_context->credential.user != current_attrs.owner) ||
(p_context->credential.user != wanted_attrs.owner))) {
FSI_TRACE(FSI_DEBUG,
"Permission denied for CHOWN opeartion: "
"current owner=%d, credential=%d, new owner=%d",
current_attrs.owner, p_context->credential.user,
wanted_attrs.owner);
Return(ERR_FSAL_PERM, 0, INDEX_FSAL_setattrs);
}
#ifdef _USE_NFS4_ACL
/* Check permission using ACL. */
access_mask = FSAL_MODE_MASK_SET(0) | /* Dummy. */
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_WRITE_OWNER);
if (!p_context->export_context->fe_static_fs_info->accesscheck_support)
status = fsal_internal_testAccess(p_context, access_mask, NULL,
¤t_attrs);
else
status = fsal_internal_access(p_context, p_filehandle, access_mask,
¤t_attrs);
if (FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_setattrs);
#endif
}
if (FSAL_TEST_MASK(wanted_attrs.asked_attributes, FSAL_ATTR_GROUP)) {
/* For modifying group, user must be root or current owner */
if ((p_context->credential.user != 0)
&& (p_context->credential.user != current_attrs.owner)) {
Return(ERR_FSAL_PERM, 0, INDEX_FSAL_setattrs);
}
int in_grp = 0;
/* set in_grp */
if (p_context->credential.group == wanted_attrs.group) {
in_grp = 1;
} else {
for(i = 0; i < p_context->credential.nbgroups; i++) {
if ((in_grp = (wanted_attrs.group ==
p_context->credential.alt_groups[i])))
break;
}
}
/* it must also be in target group */
if (p_context->credential.user != 0 && !in_grp) {
FSI_TRACE(FSI_DEBUG,
"Permission denied for CHOWN operation: "
"current group=%d, credential=%d, new group=%d",
current_attrs.group, p_context->credential.group,
wanted_attrs.group);
Return(ERR_FSAL_PERM, 0, INDEX_FSAL_setattrs);
}
#ifdef _USE_NFS4_ACL
/* Check permission using ACL. */
access_mask = FSAL_MODE_MASK_SET(0) | /* Dummy. */
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_WRITE_OWNER);
if (!p_context->export_context->fe_static_fs_info->accesscheck_support)
status = fsal_internal_testAccess(p_context, access_mask, NULL,
¤t_attrs);
else
status = fsal_internal_access(p_context, p_filehandle, access_mask,
¤t_attrs);
if (FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_setattrs);
#endif
}
if (FSAL_TEST_MASK(wanted_attrs.asked_attributes, FSAL_ATTR_OWNER |
FSAL_ATTR_GROUP)) {
/* Fill wanted owner. */
if (FSAL_TEST_MASK(wanted_attrs.asked_attributes, FSAL_ATTR_OWNER)) {
buffxstat.buffstat.st_uid = (int)wanted_attrs.owner;
} else {
buffxstat.buffstat.st_uid = (int)current_attrs.owner;
}
FSI_TRACE(FSI_DEBUG,
"current uid = %d, new uid = %d",
current_attrs.owner, buffxstat.buffstat.st_uid);
/* Fill wanted group. */
if (FSAL_TEST_MASK(wanted_attrs.asked_attributes, FSAL_ATTR_GROUP)) {
buffxstat.buffstat.st_gid = (int)wanted_attrs.group;
} else {
buffxstat.buffstat.st_gid = (int)current_attrs.group;
}
FSI_TRACE(FSI_DEBUG,
"current gid = %d, new gid = %d",
current_attrs.group, buffxstat.buffstat.st_gid);
rc = fsi_get_name_from_handle(p_context,
p_filehandle->data.handle.f_handle,
fsi_name,
NULL);
if (rc < 0) {
FSI_TRACE(FSI_ERR, "Failed to convert file handle back to filename" );
FSI_TRACE(FSI_DEBUG, "Handle to name failed for hanlde %s",
p_filehandle->data.handle.f_handle);
Return (ERR_FSAL_BADHANDLE, 0, INDEX_FSAL_setattrs);
}
FSI_TRACE(FSI_DEBUG, "handle to name: %s for handle %s",
fsi_name, p_filehandle->data.handle.f_handle);
rc = ptfsal_chown(p_context, fsi_name, buffxstat.buffstat.st_uid,
buffxstat.buffstat.st_gid);
if (rc == -1) {
FSI_TRACE(FSI_ERR, "chown FAILED");
Return (ERR_FSAL_PERM, 1, INDEX_FSAL_setattrs);
} else {
FSI_TRACE(FSI_INFO, "Chown SUCCEED");
}
}
FSI_TRACE(FSI_DEBUG, "End chown-----------------------------------\n");
/***********
* UTIME *
***********/
FSI_TRACE(FSI_DEBUG, "Begin UTIME-----------------------------------\n");
/* user must be the owner or have read access to modify 'atime' */
access_mask = FSAL_MODE_MASK_SET(FSAL_R_OK) |
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_WRITE_ATTR);
if (!p_context->export_context->fe_static_fs_info->accesscheck_support) {
status = fsal_internal_testAccess(p_context, access_mask, NULL,
¤t_attrs);
} else {
status = fsal_internal_access(p_context, p_filehandle, access_mask,
¤t_attrs);
}
if (FSAL_TEST_MASK(wanted_attrs.asked_attributes, FSAL_ATTR_ATIME)
&& (p_context->credential.user != 0)
&& (p_context->credential.user != current_attrs.owner)
&& (status.major
!= ERR_FSAL_NO_ERROR)) {
ReturnStatus(status, INDEX_FSAL_setattrs);
}
/* user must be the owner or have write access to modify 'mtime' */
access_mask = FSAL_MODE_MASK_SET(FSAL_W_OK) |
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_WRITE_ATTR);
if (!p_context->export_context->fe_static_fs_info->accesscheck_support) {
status = fsal_internal_testAccess(p_context, access_mask, NULL,
¤t_attrs);
} else {
status = fsal_internal_access(p_context, p_filehandle, access_mask,
¤t_attrs);
}
if (FSAL_TEST_MASK(wanted_attrs.asked_attributes, FSAL_ATTR_MTIME)
&& (p_context->credential.user != 0)
&& (p_context->credential.user != current_attrs.owner)
&& (status.major
!= ERR_FSAL_NO_ERROR)) {
ReturnStatus(status, INDEX_FSAL_setattrs);
}
if (FSAL_TEST_MASK(wanted_attrs.asked_attributes, FSAL_ATTR_ATIME |
FSAL_ATTR_MTIME)) {
/* Fill wanted atime. */
if (FSAL_TEST_MASK(wanted_attrs.asked_attributes, FSAL_ATTR_ATIME)) {
buffxstat.buffstat.st_atime = (time_t) wanted_attrs.atime.seconds;
FSI_TRACE(FSI_DEBUG,
"current atime = %lu, new atime = %lu",
(unsigned long)current_attrs.atime.seconds,
(unsigned long)buffxstat.buffstat.st_atime);
} else {
buffxstat.buffstat.st_atime = (time_t) current_attrs.atime.seconds;
}
FSI_TRACE(FSI_DEBUG,
"current atime = %lu, new atime = %lu",
(unsigned long)current_attrs.atime.seconds,
(unsigned long)buffxstat.buffstat.st_atime);
/* Fill wanted mtime. */
if (FSAL_TEST_MASK(wanted_attrs.asked_attributes, FSAL_ATTR_MTIME)) {
buffxstat.buffstat.st_mtime = (time_t) wanted_attrs.mtime.seconds;
} else {
buffxstat.buffstat.st_mtime = (time_t) current_attrs.mtime.seconds;
}
FSI_TRACE(FSI_DEBUG,
"current mtime = %lu, new mtime = %lu",
(unsigned long)current_attrs.mtime.seconds,
(unsigned long)buffxstat.buffstat.st_mtime);
rc = fsi_get_name_from_handle(p_context,
p_filehandle->data.handle.f_handle,
fsi_name,
NULL);
if (rc < 0) {
FSI_TRACE(FSI_ERR,
"Failed to convert file handle back to filename "
"from cache" );
FSI_TRACE(FSI_DEBUG, "Handle to name failed for hanlde %s",
p_filehandle->data.handle.f_handle);
Return (ERR_FSAL_BADHANDLE, 0, INDEX_FSAL_setattrs);
}
FSI_TRACE(FSI_DEBUG, "Handle to name: %s for handle %s",
fsi_name, p_filehandle->data.handle.f_handle);
rc = ptfsal_ntimes(p_context, fsi_name, buffxstat.buffstat.st_atime,
buffxstat.buffstat.st_mtime);
if (rc == -1) {
FSI_TRACE(FSI_ERR, "ntime FAILED");
Return (ERR_FSAL_PERM, 2, INDEX_FSAL_setattrs);
} else {
FSI_TRACE(FSI_INFO, "ntime SUCCEED");
}
}
FSI_TRACE(FSI_DEBUG, "End UTIME------------------------------\n");
#ifdef _USE_NFS4_ACL
/***********
* ACL *
***********/
if (FSAL_TEST_MASK(wanted_attrs.asked_attributes, FSAL_ATTR_ACL)) {
/* Check permission to set ACL. */
access_mask = FSAL_MODE_MASK_SET(0) | /* Dummy */
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_WRITE_ACL);
if (!p_context->export_context->fe_static_fs_info->accesscheck_support)
status = fsal_internal_testAccess(p_context, access_mask, NULL,
¤t_attrs);
else
status = fsal_internal_access(p_context, p_filehandle, access_mask,
¤t_attrs);
if (FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_setattrs);
if (wanted_attrs.acl) {
LogDebug(COMPONENT_FSAL, "setattr acl = %p", wanted_attrs.acl);
/* Convert FSAL ACL to PTFS NFS4 ACL and fill the buffer. */
status = fsal_acl_2_ptfs_acl(wanted_attrs.acl, &buffxstat);
if (FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_setattrs);
} else {
LogCrit(COMPONENT_FSAL, "setattr acl is NULL");
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_setattrs);
}
}
#endif /* _USE_NFS4_ACL */
/* Optionaly fills output attributes. */
if (p_object_attributes) {
status = PTFSAL_getattrs(p_filehandle, p_context, p_object_attributes);
/* on error, we set a special bit in the mask. */
if (FSAL_IS_ERROR(status)) {
FSAL_CLEAR_MASK(p_object_attributes->asked_attributes);
FSAL_SET_MASK(p_object_attributes->asked_attributes,
FSAL_ATTR_RDATTR_ERR);
}
}
FSI_TRACE(FSI_DEBUG, "End--------------------------------------------\n");
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_setattrs);
}
/**
* FSAL_mknode:
* Create a special object in the filesystem.
* Not supported upon HPSS.
*
* \return ERR_FSAL_NOTSUPP.
*/
fsal_status_t GPFSFSAL_mknode(fsal_handle_t * parentdir_handle, /* IN */
fsal_name_t * p_node_name, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_accessmode_t accessmode, /* IN */
fsal_nodetype_t nodetype, /* IN */
fsal_dev_t * dev, /* IN */
fsal_handle_t * p_object_handle, /* OUT (handle to the created node) */
fsal_attrib_list_t * node_attributes /* [ IN/OUT ] */
)
{
int rc, errsv;
int setgid_bit = 0;
fsal_status_t status;
int fd, newfd;
mode_t unix_mode = 0;
dev_t unix_dev = 0;
fsal_accessflags_t access_mask = 0;
fsal_attrib_list_t parent_dir_attrs;
/* sanity checks.
* note : link_attributes is optional.
*/
if(!parentdir_handle || !p_context || !p_node_name)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_mknode);
unix_mode = fsal2unix_mode(accessmode);
/* Apply umask */
unix_mode = unix_mode & ~global_fs_info.umask;
switch (nodetype)
{
case FSAL_TYPE_BLK:
if(!dev)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_mknode);
unix_mode |= S_IFBLK;
unix_dev = (dev->major << 8) | (dev->minor & 0xFF);
break;
case FSAL_TYPE_CHR:
if(!dev)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_mknode);
unix_mode |= S_IFCHR;
unix_dev = (dev->major << 8) | (dev->minor & 0xFF);
break;
case FSAL_TYPE_SOCK:
unix_mode |= S_IFSOCK;
break;
case FSAL_TYPE_FIFO:
unix_mode |= S_IFIFO;
break;
default:
LogMajor(COMPONENT_FSAL,
"Invalid node type in FSAL_mknode: %d", nodetype);
Return(ERR_FSAL_INVAL, 0, INDEX_FSAL_mknode);
}
/* build the directory path */
status =
fsal_internal_handle2fd(p_context, parentdir_handle, &fd, O_RDONLY | O_DIRECTORY);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_mknode);
/* retrieve directory attributes */
parent_dir_attrs.asked_attributes = GPFS_SUPPORTED_ATTRIBUTES;
status = GPFSFSAL_getattrs(parentdir_handle, p_context, &parent_dir_attrs);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_mknode);
/* Check the user can write in the directory, and check weither the setgid bit on the directory */
if(fsal2unix_mode(parent_dir_attrs.mode) & S_ISGID)
setgid_bit = 1;
/* Set both mode and ace4 mask */
access_mask = FSAL_MODE_MASK_SET(FSAL_W_OK | FSAL_X_OK) |
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_ADD_FILE);
status = fsal_internal_testAccess(p_context, access_mask, NULL, &parent_dir_attrs);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_mknode);
/* creates the node, then stats it */
rc = mknodat(fd, p_node_name->name, unix_mode, unix_dev);
errsv = errno;
if(rc)
{
close(fd);
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_mknode);
}
/* WARNING:
* After creating the new node, the node name could have been changed.
* This is a race condition. However only root creates new nodes. This
* is an unlikely race condition, but hopefully can be fixed someday.
*/
if(FSAL_IS_ERROR(status = fsal_internal_get_handle_at(fd, p_node_name,
p_object_handle)))
{
close(fd);
ReturnStatus(status, INDEX_FSAL_mknode);
}
if(FSAL_IS_ERROR(status = fsal_internal_handle2fd_at(fd,
p_object_handle, &newfd,
O_RDONLY | O_NOFOLLOW)))
{
close(fd);
ReturnStatus(status, INDEX_FSAL_mknode);
}
/* the node has been created */
/* chown the file to the current user/group */
if(p_context->credential.user != geteuid())
{
/* if the setgid_bit was set on the parent directory, do not change the group of the created file, because it's already the parentdir's group */
rc = fchown(newfd, p_context->credential.user,
setgid_bit ? -1 : (int)p_context->credential.group);
errsv = errno;
if(rc)
{
close(fd);
close(newfd);
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_mknode);
}
}
close(fd);
close(newfd);
/* Fills the attributes if needed */
if(node_attributes)
{
status = GPFSFSAL_getattrs(p_object_handle, p_context, node_attributes);
/* on error, we set a special bit in the mask. */
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(node_attributes->asked_attributes);
FSAL_SET_MASK(node_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
/* Finished */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_mknode);
}
/**
* 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,...).
* \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 (optional input/output):
* The 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).
* May be NULL.
*
* \return Major error codes :
* - ERR_FSAL_NO_ERROR (no error)
* - Another error code if an error occurred.
*/
fsal_status_t XFSFSAL_create(fsal_handle_t * p_parent_directory_handle, /* IN */
fsal_name_t * p_filename, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_accessmode_t accessmode, /* IN */
fsal_handle_t * p_object_handle, /* OUT */
fsal_attrib_list_t * p_object_attributes /* [ IN/OUT ] */
)
{
int rc, errsv;
int setgid_bit = 0;
fsal_status_t status;
int fd, newfd;
struct stat buffstat;
mode_t unix_mode;
/* sanity checks.
* note : object_attributes is optional.
*/
if(!p_parent_directory_handle || !p_context || !p_object_handle || !p_filename)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_create);
/* convert fsal mode to unix mode. */
unix_mode = fsal2unix_mode(accessmode);
/* Apply umask */
unix_mode = unix_mode & ~global_fs_info.umask;
LogFullDebug(COMPONENT_FSAL, "Creation mode: 0%o", accessmode);
TakeTokenFSCall();
status =
fsal_internal_handle2fd(p_context, p_parent_directory_handle, &fd, O_DIRECTORY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_create);
/* retrieve directory metadata */
TakeTokenFSCall();
rc = fstat(fd, &buffstat);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
close(fd);
if(errsv == ENOENT)
Return(ERR_FSAL_STALE, errsv, INDEX_FSAL_create);
else
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_create);
}
/* Check the user can write in the directory, and check the setgid bit on the directory */
if(buffstat.st_mode & S_ISGID)
setgid_bit = 1;
status = fsal_internal_testAccess(p_context, FSAL_W_OK | FSAL_X_OK, &buffstat, NULL);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_create);
/* call to filesystem */
TakeTokenFSCall();
/* create the file.
* O_EXCL=> error if the file already exists */
newfd = openat(fd, p_filename->name, O_CREAT | O_WRONLY | O_TRUNC | O_EXCL, unix_mode);
errsv = errno;
if(newfd == -1)
{
close(fd);
ReleaseTokenFSCall();
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_create);
}
/* get the new file handle */
status = fsal_internal_fd2handle(p_context, newfd, p_object_handle);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
{
close(fd);
close(newfd);
ReturnStatus(status, INDEX_FSAL_create);
}
/* the file has been created */
/* chown the file to the current user */
if(((xfsfsal_op_context_t *)p_context)->credential.user != geteuid())
{
TakeTokenFSCall();
/* if the setgid_bit was set on the parent directory, do not change the group of the created file, because it's already the parentdir's group */
rc = fchown(newfd, ((xfsfsal_op_context_t *)p_context)->credential.user,
setgid_bit ? -1 : (int)((xfsfsal_op_context_t *)p_context)->credential.group);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
close(fd);
close(newfd);
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_create);
}
}
close(fd);
close(newfd);
/* retrieve file attributes */
if(p_object_attributes)
{
status = XFSFSAL_getattrs(p_object_handle, p_context, p_object_attributes);
/* on error, we set a special bit in the mask. */
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(p_object_attributes->asked_attributes);
FSAL_SET_MASK(p_object_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
/* OK */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_create);
}
/**
* FSAL_mknode:
* Create a special object in the filesystem.
* Not supported upon HPSS.
*
* \return ERR_FSAL_NOTSUPP.
*/
fsal_status_t XFSFSAL_mknode(fsal_handle_t * parentdir_handle, /* IN */
fsal_name_t * p_node_name, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_accessmode_t accessmode, /* IN */
fsal_nodetype_t nodetype, /* IN */
fsal_dev_t * dev, /* IN */
fsal_handle_t * p_object_handle, /* OUT (handle to the created node) */
fsal_attrib_list_t * node_attributes /* [ IN/OUT ] */
)
{
int rc, errsv;
int setgid_bit = 0;
struct stat buffstat;
fsal_status_t status;
int fd, newfd;
mode_t unix_mode = 0;
dev_t unix_dev = 0;
/* sanity checks.
* note : link_attributes is optional.
*/
if(!parentdir_handle || !p_context || !p_node_name)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_mknode);
unix_mode = fsal2unix_mode(accessmode);
/* Apply umask */
unix_mode = unix_mode & ~global_fs_info.umask;
switch (nodetype)
{
case FSAL_TYPE_BLK:
if(!dev)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_mknode);
unix_mode |= S_IFBLK;
unix_dev = (dev->major << 8) | (dev->minor & 0xFF);
break;
case FSAL_TYPE_CHR:
if(!dev)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_mknode);
unix_mode |= S_IFCHR;
unix_dev = (dev->major << 8) | (dev->minor & 0xFF);
break;
case FSAL_TYPE_SOCK:
unix_mode |= S_IFSOCK;
break;
case FSAL_TYPE_FIFO:
unix_mode |= S_IFIFO;
break;
default:
LogMajor(COMPONENT_FSAL, "Invalid node type in FSAL_mknode: %d",
nodetype);
Return(ERR_FSAL_INVAL, 0, INDEX_FSAL_mknode);
}
/* build the directory path */
TakeTokenFSCall();
status = fsal_internal_handle2fd(p_context, parentdir_handle, &fd, O_DIRECTORY);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_mknode);
/* retrieve directory attributes */
TakeTokenFSCall();
rc = fstat(fd, &buffstat);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
close(fd);
if(errsv == ENOENT)
Return(ERR_FSAL_STALE, errsv, INDEX_FSAL_mknode);
else
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_mknode);
}
/* Check the user can write in the directory, and check weither the setgid bit on the directory */
if(buffstat.st_mode & S_ISGID)
setgid_bit = 1;
status = fsal_internal_testAccess(p_context, FSAL_W_OK | FSAL_X_OK, &buffstat, NULL);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_mknode);
/* creates the node, then stats it */
TakeTokenFSCall();
rc = mknodat(fd, p_node_name->name, unix_mode, unix_dev);
errsv = errno;
if(rc)
{
close(fd);
ReleaseTokenFSCall();
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_mknode);
}
/* get the new object handle */
if((newfd = openat(fd, p_node_name->name, O_RDONLY, 0600)) < 0)
{
errsv = errno;
close(fd);
ReleaseTokenFSCall();
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_mkdir);
}
status = fsal_internal_fd2handle(p_context, newfd, p_object_handle);
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(status))
{
close(fd);
close(newfd);
ReturnStatus(status, INDEX_FSAL_mknode);
}
/* the node has been created */
/* chown the file to the current user/group */
if(((xfsfsal_op_context_t *)p_context)->credential.user != geteuid())
{
TakeTokenFSCall();
/* if the setgid_bit was set on the parent directory, do not change the group of the created file, because it's already the parentdir's group */
rc = fchown(newfd, ((xfsfsal_op_context_t *)p_context)->credential.user,
setgid_bit ? -1 : (int)((xfsfsal_op_context_t *)p_context)->credential.group);
errsv = errno;
ReleaseTokenFSCall();
if(rc)
{
close(fd);
close(newfd);
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_mknode);
}
}
close(fd);
close(newfd);
/* Fills the attributes if needed */
if(node_attributes)
{
status = XFSFSAL_getattrs(p_object_handle, p_context, node_attributes);
/* on error, we set a special bit in the mask. */
if(FSAL_IS_ERROR(status))
{
FSAL_CLEAR_MASK(node_attributes->asked_attributes);
FSAL_SET_MASK(node_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
}
}
/* Finished */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_mknode);
}
/**
* @brief Create a symbolic link.
*
* @param dir_hdl Handle of the parent dir where the link is to be created.
* @param linkname Name of the link to be created.
* @param linkcontent Content of the link to be created.
* @param op_ctx Authentication context for the operation (user,...).
* @param accessmode Mode of the link to be created.
* It has no sense in POSIX filesystems.
* @param gpfs_fh Pointer to the handle of the created symlink.
* @param link_attr Attributes of the newly created symlink.
* 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)
* - Another error code if an error occured.
*/
fsal_status_t
GPFSFSAL_symlink(struct fsal_obj_handle *dir_hdl, const char *linkname,
const char *linkcontent, const struct req_op_context *op_ctx,
uint32_t accessmode, struct gpfs_file_handle *gpfs_fh,
struct attrlist *link_attr)
{
int rc, errsv;
fsal_status_t status;
int fd;
struct gpfs_fsal_obj_handle *gpfs_hdl;
struct gpfs_filesystem *gpfs_fs;
/* note : link_attr is optional. */
if (!dir_hdl || !op_ctx || !gpfs_fh || !linkname
|| !linkcontent)
return fsalstat(ERR_FSAL_FAULT, 0);
gpfs_hdl =
container_of(dir_hdl, struct gpfs_fsal_obj_handle, obj_handle);
gpfs_fs = dir_hdl->fs->private_data;
/* Tests if symlinking is allowed by configuration. */
if (!op_ctx->fsal_export->exp_ops.
fs_supports(op_ctx->fsal_export,
fso_symlink_support))
return fsalstat(ERR_FSAL_NOTSUPP, 0);
status = fsal_internal_handle2fd(gpfs_fs->root_fd, gpfs_hdl->handle,
&fd, O_RDONLY | O_DIRECTORY, 0);
if (FSAL_IS_ERROR(status))
return status;
/* build symlink path */
/* create the symlink on the filesystem using the credentials
* for proper ownership assignment.
*/
fsal_set_credentials(op_ctx->creds);
rc = symlinkat(linkcontent, fd, linkname);
errsv = errno;
fsal_restore_ganesha_credentials();
if (rc) {
close(fd);
return fsalstat(posix2fsal_error(errsv), errsv);
}
/* now get the associated handle, while there is a race, there is
also a race lower down */
status = fsal_internal_get_handle_at(fd, linkname, gpfs_fh);
if (FSAL_IS_ERROR(status)) {
close(fd);
return status;
}
/* get attributes */
status = GPFSFSAL_getattrs(op_ctx->fsal_export, gpfs_fs,
op_ctx, gpfs_fh,
link_attr);
if (!FSAL_IS_ERROR(status) && link_attr->type != SYMBOLIC_LINK) {
/* We could wind up not failing the creation of the symlink
* and the only way we know is that the object type isn't
* a symlink.
*/
fsal_release_attrs(link_attr);
status = fsalstat(ERR_FSAL_EXIST, 0);
}
close(fd);
return status;
}
