/**
* 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_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);
}
/**
* 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 PTFSAL_lookup(const struct req_op_context *p_context,
struct fsal_obj_handle *parent,
const char *p_filename,
struct attrlist *p_object_attr,
ptfsal_handle_t *fh)
{
fsal_status_t status;
int parent_fd;
struct attrlist *parent_dir_attrs;
fsi_stat_struct buffstat;
int rc;
struct pt_fsal_obj_handle *parent_hdl;
FSI_TRACE(FSI_DEBUG, "Begin##################################\n");
if (p_filename != NULL)
FSI_TRACE(FSI_DEBUG, "FSI - fsal_lookup file [%s]\n",
p_filename);
if (parent != NULL)
FSI_TRACE(FSI_DEBUG, "FSI - fsal_lookup parent dir\n");
if (!parent || !p_filename)
return fsalstat(ERR_FSAL_FAULT, 0);
parent_hdl =
container_of(parent, struct pt_fsal_obj_handle, obj_handle);
parent_dir_attrs = &parent_hdl->obj_handle.attributes;
/* get directory metadata */
parent_dir_attrs->mask = p_context->fsal_export->exp_ops.
fs_supported_attrs(p_context->fsal_export);
status =
fsal_internal_handle2fd_at(p_context, parent_hdl, &parent_fd,
O_RDONLY);
if (FSAL_IS_ERROR(status))
return status;
FSI_TRACE(FSI_DEBUG, "FSI - lookup parent directory type = %d\n",
parent_dir_attrs->type);
/* Be careful about junction crossing, symlinks, hardlinks,... */
switch (parent_dir_attrs->type) {
case DIRECTORY:
/* OK */
break;
case REGULAR_FILE:
case SYMBOLIC_LINK:
/* not a directory */
pt_close(parent);
return fsalstat(ERR_FSAL_NOTDIR, 0);
default:
return fsalstat(ERR_FSAL_SERVERFAULT, 0);
}
/* get file handle, it it exists */
/* This might be a race, but it's the best we can currently do */
rc = ptfsal_stat_by_parent_name(p_context, parent_hdl, p_filename,
&buffstat);
if (rc < 0) {
ptfsal_closedir_fd(p_context, p_context->fsal_export,
parent_fd);
return fsalstat(ERR_FSAL_NOENT, errno);
}
memset(fh->data.handle.f_handle, 0, sizeof(fh->data.handle.f_handle));
memcpy(&fh->data.handle.f_handle, &buffstat.st_persistentHandle.handle,
FSI_CCL_PERSISTENT_HANDLE_N_BYTES);
fh->data.handle.handle_size = FSI_CCL_PERSISTENT_HANDLE_N_BYTES;
fh->data.handle.handle_key_size = OPENHANDLE_KEY_LEN;
fh->data.handle.handle_version = OPENHANDLE_VERSION;
fh->data.handle.handle_type = posix2fsal_type(buffstat.st_mode);
/* get object attributes */
if (p_object_attr) {
p_object_attr->mask = p_context->fsal_export->exp_ops.
fs_supported_attrs(p_context->fsal_export);
status = PTFSAL_getattrs(p_context->fsal_export, p_context,
fh, p_object_attr);
if (FSAL_IS_ERROR(status)) {
FSAL_CLEAR_MASK(p_object_attr->mask);
FSAL_SET_MASK(p_object_attr->mask, ATTR_RDATTR_ERR);
}
}
ptfsal_closedir_fd(p_context, p_context->fsal_export, parent_fd);
FSI_TRACE(FSI_DEBUG, "End##################################\n");
/* lookup complete ! */
return fsalstat(ERR_FSAL_NO_ERROR, 0);
}
fsal_status_t GPFSFSAL_readdir(gpfsfsal_dir_t * p_dir_descriptor, /* IN */
gpfsfsal_cookie_t start_position, /* IN */
fsal_attrib_mask_t get_attr_mask, /* IN */
fsal_mdsize_t buffersize, /* IN */
fsal_dirent_t * p_pdirent, /* OUT */
gpfsfsal_cookie_t * p_end_position, /* OUT */
fsal_count_t * p_nb_entries, /* OUT */
fsal_boolean_t * p_end_of_dir /* OUT */
)
{
fsal_status_t st;
fsal_count_t max_dir_entries;
fsal_name_t entry_name;
char buff[BUF_SIZE];
struct linux_dirent *dp = NULL;
int bpos = 0;
int tmpfd = 0;
char d_type;
struct stat buffstat;
int rc = 0;
memset(buff, 0, BUF_SIZE);
memset(&entry_name, 0, sizeof(fsal_name_t));
/*****************/
/* sanity checks */
/*****************/
if(!p_dir_descriptor || !p_pdirent || !p_end_position || !p_nb_entries || !p_end_of_dir)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_readdir);
max_dir_entries = (buffersize / sizeof(fsal_dirent_t));
/***************************/
/* seek into the directory */
/***************************/
errno = 0;
if(start_position.data.cookie == 0)
{
//rewinddir(p_dir_descriptor->p_dir);
rc = errno;
}
else
{
//seekdir(p_dir_descriptor->p_dir, start_position.cookie);
rc = errno;
}
if(rc)
Return(posix2fsal_error(rc), rc, INDEX_FSAL_readdir);
/************************/
/* browse the directory */
/************************/
*p_nb_entries = 0;
while(*p_nb_entries < max_dir_entries)
{
/***********************/
/* read the next entry */
/***********************/
TakeTokenFSCall();
rc = syscall(SYS_getdents, p_dir_descriptor->fd, buff, BUF_SIZE);
ReleaseTokenFSCall();
if(rc < 0)
{
rc = errno;
Return(posix2fsal_error(rc), rc, INDEX_FSAL_readdir);
}
/* End of directory */
if(rc == 0)
{
*p_end_of_dir = 1;
break;
}
/***********************************/
/* Get information about the entry */
/***********************************/
for(bpos = 0; bpos < rc;)
{
dp = (struct linux_dirent *)(buff + bpos);
d_type = *(buff + bpos + dp->d_reclen - 1);
/** @todo not used for the moment. Waiting for information on symlink management */
bpos += dp->d_reclen;
/* LogFullDebug(COMPONENT_FSAL,
"\tino=%8ld|%8lx off=%d|%x reclen=%d|%x name=%s|%d", dp->d_ino, dp->d_ino, (int)dp->d_off, (int)dp->d_off,
dp->d_reclen, dp->d_reclen, dp->d_name, (int)dp->d_name[0] ) ; */
if(!(*p_nb_entries < max_dir_entries))
break;
/* skip . and .. */
if(!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
continue;
/* build the full path of the file into "fsalpath */
if(FSAL_IS_ERROR
(st =
FSAL_str2name(dp->d_name, FSAL_MAX_NAME_LEN,
&(p_pdirent[*p_nb_entries].name))))
ReturnStatus(st, INDEX_FSAL_readdir);
d_type = DT_UNKNOWN;
// TODO: there is a race here, because between handle fetch
// and open at things might change. we need to figure out if there
// is another way to open without the pcontext
strncpy(entry_name.name, dp->d_name, sizeof(entry_name.name));
entry_name.len = strlen(entry_name.name);
if(FSAL_IS_ERROR
(st =
fsal_internal_get_handle_at(p_dir_descriptor->fd, &entry_name,
&(p_pdirent[*p_nb_entries].handle))))
ReturnStatus(st, INDEX_FSAL_readdir);
if(FSAL_IS_ERROR
(st =
fsal_internal_handle2fd_at(p_dir_descriptor->fd,
&(p_pdirent[*p_nb_entries].handle), &tmpfd,
O_RDONLY | O_NOFOLLOW)))
{
if(errno != ELOOP) /* ( p_dir_descriptor->fd, dp->d_name) is not a symlink */
ReturnStatus(st, INDEX_FSAL_readdir);
else
d_type = DT_LNK;
}
/* get object handle */
TakeTokenFSCall();
if(d_type != DT_LNK)
{
close(tmpfd);
}
else
{
if(fstatat(p_dir_descriptor->fd, dp->d_name, &buffstat, AT_SYMLINK_NOFOLLOW)
< 0)
{
ReleaseTokenFSCall();
Return(posix2fsal_error(errno), errno, INDEX_FSAL_readdir);
}
p_pdirent[*p_nb_entries].attributes.asked_attributes = get_attr_mask;
st = posix2fsal_attributes(&buffstat, &p_pdirent[*p_nb_entries].attributes);
if(FSAL_IS_ERROR(st))
{
ReleaseTokenFSCall();
FSAL_CLEAR_MASK(p_pdirent[*p_nb_entries].attributes.asked_attributes);
FSAL_SET_MASK(p_pdirent[*p_nb_entries].attributes.asked_attributes,
FSAL_ATTR_RDATTR_ERR);
ReturnStatus(st, INDEX_FSAL_getattrs);
}
}
ReleaseTokenFSCall();
if(FSAL_IS_ERROR(st))
ReturnStatus(st, INDEX_FSAL_readdir);
/************************
* Fills the attributes *
************************/
if(d_type != DT_LNK)
{
p_pdirent[*p_nb_entries].attributes.asked_attributes = get_attr_mask;
st = GPFSFSAL_getattrs(&(p_pdirent[*p_nb_entries].handle),
&p_dir_descriptor->context,
&p_pdirent[*p_nb_entries].attributes);
if(FSAL_IS_ERROR(st))
{
FSAL_CLEAR_MASK(p_pdirent[*p_nb_entries].attributes.asked_attributes);
FSAL_SET_MASK(p_pdirent[*p_nb_entries].attributes.asked_attributes,
FSAL_ATTR_RDATTR_ERR);
}
}
p_pdirent[*p_nb_entries].cookie.data.cookie = dp->d_off;
p_pdirent[*p_nb_entries].nextentry = NULL;
if(*p_nb_entries)
p_pdirent[*p_nb_entries - 1].nextentry = &(p_pdirent[*p_nb_entries]);
(*p_end_position) = p_pdirent[*p_nb_entries].cookie;
(*p_nb_entries)++;
} /* for */
} /* While */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_readdir);
}
/**
* read_dirents
* read the directory and call through the callback function for
* each entry.
* @param dir_hdl [IN] the directory to read
* @param whence [IN] where to start (next)
* @param dir_state [IN] pass thru of state to callback
* @param cb [IN] callback function
* @param eof [OUT] eof marker true == end of dir
*/
static fsal_status_t read_dirents(struct fsal_obj_handle *dir_hdl,
fsal_cookie_t *whence, void *dir_state,
fsal_readdir_cb cb, attrmask_t attrmask,
bool *eof)
{
fsal_errors_t fsal_error = ERR_FSAL_NO_ERROR;
int retval = 0;
struct gpfs_fsal_obj_handle *myself;
int dirfd;
fsal_status_t status;
off_t seekloc = 0;
int bpos, cnt, nread;
struct dirent64 *dentry;
char buf[BUF_SIZE];
struct gpfs_filesystem *gpfs_fs;
if (whence != NULL)
seekloc = (off_t) *whence;
myself = container_of(dir_hdl, struct gpfs_fsal_obj_handle, obj_handle);
gpfs_fs = dir_hdl->fs->private_data;
status = fsal_internal_handle2fd_at(gpfs_fs->root_fd, myself->handle,
&dirfd, O_RDONLY | O_DIRECTORY, 0);
if (dirfd < 0)
return status;
seekloc = lseek(dirfd, seekloc, SEEK_SET);
if (seekloc < 0) {
retval = errno;
fsal_error = posix2fsal_error(retval);
goto done;
}
cnt = 0;
do {
nread = syscall(SYS_getdents64, dirfd, buf, BUF_SIZE);
if (nread < 0) {
retval = errno;
fsal_error = posix2fsal_error(retval);
goto done;
}
if (nread == 0)
break;
for (bpos = 0; bpos < nread;) {
struct fsal_obj_handle *hdl;
struct attrlist attrs;
bool cb_rc;
dentry = (struct dirent64 *)(buf + bpos);
if (strcmp(dentry->d_name, ".") == 0
|| strcmp(dentry->d_name, "..") == 0)
goto skip; /* must skip '.' and '..' */
fsal_prepare_attrs(&attrs, attrmask);
status = lookup(dir_hdl, dentry->d_name, &hdl, &attrs);
if (FSAL_IS_ERROR(status)) {
fsal_error = status.major;
goto done;
}
/* callback to cache inode */
cb_rc = cb(dentry->d_name, hdl, &attrs, dir_state,
(fsal_cookie_t) dentry->d_off);
fsal_release_attrs(&attrs);
if (!cb_rc)
goto done;
skip:
bpos += dentry->d_reclen;
cnt++;
}
} while (nread > 0);
*eof = true;
done:
close(dirfd);
return fsalstat(fsal_error, retval);
}
