/**
* @brief Create a regular file.
*
* @param dir_hdl Handle of parent directory where the file is to be created.
* @param filename Pointer to the name of the file to be created.
* @param op_ctx Authentication context for the operation (user,...).
* @param accessmode Mode for the file to be created.
* @param gpfs_fh Pointer to the handle of the created file.
* @param fsal_attr Attributes of the created file.
* @return ERR_FSAL_NO_ERROR on success, otherwise error
*
*/
fsal_status_t
GPFSFSAL_create(struct fsal_obj_handle *dir_hdl, const char *filename,
const struct req_op_context *op_ctx, uint32_t accessmode,
struct gpfs_file_handle *gpfs_fh, struct attrlist *fsal_attr)
{
fsal_status_t status;
mode_t unix_mode;
/* note : fsal_attr is optional. */
if (!dir_hdl || !op_ctx || !gpfs_fh || !filename)
return fsalstat(ERR_FSAL_FAULT, 0);
/* convert fsal mode to unix mode. */
unix_mode = fsal2unix_mode(accessmode);
/* Apply umask */
unix_mode = unix_mode & ~op_ctx->fsal_export->exp_ops.
fs_umask(op_ctx->fsal_export);
LogFullDebug(COMPONENT_FSAL, "Creation mode: 0%o", accessmode);
/* call to filesystem */
fsal_set_credentials(op_ctx->creds);
status = fsal_internal_create(dir_hdl, filename, unix_mode | S_IFREG,
0, gpfs_fh, NULL);
fsal_restore_ganesha_credentials();
if (FSAL_IS_ERROR(status))
return status;
/* retrieve file attributes */
return GPFSFSAL_getattrs(op_ctx->fsal_export, dir_hdl->fs->private_data,
op_ctx, gpfs_fh, fsal_attr);
}
fsal_status_t
GPFSFSAL_create2(struct fsal_obj_handle *dir_hdl, const char *filename,
const struct req_op_context *op_ctx, mode_t unix_mode,
struct gpfs_file_handle *gpfs_fh, int posix_flags,
struct attrlist *fsal_attr)
{
fsal_status_t status;
/* note : fsal_attr is optional. */
if (!dir_hdl || !op_ctx || !gpfs_fh || !filename)
return fsalstat(ERR_FSAL_FAULT, 0);
LogFullDebug(COMPONENT_FSAL, "Creation mode: 0%o", unix_mode);
/* call to filesystem */
fsal_set_credentials(op_ctx->creds);
status = fsal_internal_create(dir_hdl, filename, unix_mode | S_IFREG,
posix_flags, gpfs_fh, NULL);
fsal_restore_ganesha_credentials();
if (FSAL_IS_ERROR(status))
return status;
/* retrieve file attributes */
return GPFSFSAL_getattrs(op_ctx->fsal_export, dir_hdl->fs->private_data,
op_ctx, gpfs_fh, fsal_attr);
}
/**
* @brief Create a hardlink.
*
* @param dir_hdl Handle of the target object.
* @param gpfs_fh Pointer to the directory handle where hardlink is to be created.
* @param linkname Pointer to the name of the hardlink to be created.
* @param op_ctx Authentication context for the operation (user,...).
* @return ERR_FSAL_NO_ERROR on success, error otherwise
*
*/
fsal_status_t
GPFSFSAL_link(struct fsal_obj_handle *dir_hdl, struct gpfs_file_handle *gpfs_fh,
const char *linkname, const struct req_op_context *op_ctx)
{
struct gpfs_filesystem *gpfs_fs;
fsal_status_t status;
struct gpfs_fsal_obj_handle *dest_dir;
/* note : fsal_attr is optional.
*/
if (!dir_hdl || !gpfs_fh || !op_ctx || !linkname)
return fsalstat(ERR_FSAL_FAULT, 0);
dest_dir =
container_of(dir_hdl, struct gpfs_fsal_obj_handle, obj_handle);
gpfs_fs = dir_hdl->fs->private_data;
/* Tests if hardlinking is allowed by configuration. */
if (!op_ctx->fsal_export->exp_ops.
fs_supports(op_ctx->fsal_export,
fso_link_support))
return fsalstat(ERR_FSAL_NOTSUPP, 0);
/* Create the link on the filesystem */
fsal_set_credentials(op_ctx->creds);
status = fsal_internal_link_fh(gpfs_fs->root_fd, gpfs_fh,
dest_dir->handle, linkname);
fsal_restore_ganesha_credentials();
return status;
}
fsal_status_t vfs_write(struct fsal_obj_handle *obj_hdl,
uint64_t offset,
size_t buffer_size, void *buffer, size_t *write_amount,
bool *fsal_stable)
{
struct vfs_fsal_obj_handle *myself;
ssize_t nb_written;
fsal_errors_t fsal_error = ERR_FSAL_NO_ERROR;
int retval = 0;
myself = container_of(obj_hdl, struct vfs_fsal_obj_handle, obj_handle);
if (obj_hdl->fsal != obj_hdl->fs->fsal) {
LogDebug(COMPONENT_FSAL,
"FSAL %s operation for handle belonging to FSAL %s, return EXDEV",
obj_hdl->fsal->name, obj_hdl->fs->fsal->name);
retval = EXDEV;
fsal_error = posix2fsal_error(retval);
return fsalstat(fsal_error, retval);
}
/* Take read lock on object to protect file descriptor. */
PTHREAD_RWLOCK_rdlock(&obj_hdl->lock);
assert(myself->u.file.fd >= 0
&& myself->u.file.openflags != FSAL_O_CLOSED);
fsal_set_credentials(op_ctx->creds);
nb_written = pwrite(myself->u.file.fd, buffer, buffer_size, offset);
if (offset == -1 || nb_written == -1) {
retval = errno;
fsal_error = posix2fsal_error(retval);
goto out;
}
*write_amount = nb_written;
/* attempt stability */
if (fsal_stable != NULL && *fsal_stable) {
retval = fsync(myself->u.file.fd);
if (retval == -1) {
retval = errno;
fsal_error = posix2fsal_error(retval);
}
*fsal_stable = true;
}
out:
PTHREAD_RWLOCK_unlock(&obj_hdl->lock);
fsal_restore_ganesha_credentials();
return fsalstat(fsal_error, retval);
}
/** @fn fsal_status_t
* GPFSFSAL_read(int fd, uint64_t offset, size_t buffer_size, caddr_t buffer,
* size_t *p_read_amount, bool *p_end_of_file)
* @brief Perform a read operation on an opened file.
* @param fd The file descriptor returned by FSAL_open.
* @offset Offset
* @param buf_size Amount (in bytes) of data to be read.
* @param buf Address where the read data is to be stored in memory.
* @param read_amount Pointer to the amount of data (in bytes) that have been read
* during this call.
* @param end_of_file Pointer to a boolean that indicates whether the end of file
* has been reached during this call.
*
* @return ERR_FSAL_NO_ERROR on success, error otherwise.
*/
fsal_status_t
GPFSFSAL_read(int fd, uint64_t offset, size_t buf_size, caddr_t buf,
size_t *read_amount, bool *end_of_file, int expfd)
{
struct read_arg rarg = {0};
ssize_t nb_read;
int errsv;
/* sanity checks. */
if (!buf || !read_amount || !end_of_file)
return fsalstat(ERR_FSAL_FAULT, 0);
rarg.mountdirfd = expfd;
rarg.fd = fd;
rarg.bufP = buf;
rarg.offset = offset;
rarg.length = buf_size;
rarg.options = 0;
fsal_set_credentials(op_ctx->creds);
nb_read = gpfs_ganesha(OPENHANDLE_READ_BY_FD, &rarg);
errsv = errno;
fsal_restore_ganesha_credentials();
/* negative values mean error */
if (nb_read < 0) {
/* if nb_read is not -1, the split rc/errno didn't work */
if (nb_read != -1) {
errsv = labs(nb_read);
LogWarn(COMPONENT_FSAL,
"Received negative value (%d) from ioctl().",
(int) nb_read);
}
if (errsv == EUNATCH)
LogFatal(COMPONENT_FSAL, "GPFS Returned EUNATCH");
return fsalstat(posix2fsal_error(errsv), errsv);
}
if (nb_read == 0 || nb_read < buf_size)
*end_of_file = true;
*read_amount = nb_read;
return fsalstat(ERR_FSAL_NO_ERROR, 0);
}
fsal_status_t vfs_commit2(struct fsal_obj_handle *obj_hdl,
off_t offset,
size_t len)
{
struct vfs_fsal_obj_handle *myself;
fsal_status_t status;
int retval;
struct vfs_fd temp_fd = {0, -1}, *out_fd = &temp_fd;
bool has_lock = false;
bool closefd = false;
myself = container_of(obj_hdl, struct vfs_fsal_obj_handle, obj_handle);
/* Make sure file is open in appropriate mode.
* Do not check share reservation.
*/
status = fsal_reopen_obj(obj_hdl, false, false, FSAL_O_WRITE,
(struct fsal_fd *)&myself->u.file.fd,
&myself->u.file.share,
vfs_open_func, vfs_close_func,
(struct fsal_fd **)&out_fd, &has_lock,
&closefd);
if (!FSAL_IS_ERROR(status)) {
fsal_set_credentials(op_ctx->creds);
retval = fsync(out_fd->fd);
if (retval == -1) {
retval = errno;
status = fsalstat(posix2fsal_error(retval), retval);
}
fsal_restore_ganesha_credentials();
}
if (closefd)
close(out_fd->fd);
if (has_lock)
PTHREAD_RWLOCK_unlock(&obj_hdl->lock);
return status;
}
/** @fn fsal_status_t
* GPFSFSAL_write(int fd, uint64_t offset, size_t buf_size, caddr_t buf,
* size_t *write_amount, bool *fsal_stable,
* const struct req_op_context *op_ctx)
* @brief Perform a write operation on an opened file.
*
* @param fd The file descriptor returned by FSAL_open.
* @param buf_size Amount (in bytes) of data to be written.
* @param buf Address where the data is in memory.
* @param write_amount Pointer to the amount of data (in bytes) that have been written
* during this call.
*
* @return ERR_FSAL_NO_ERROR on success, error otherwise
*/
fsal_status_t
GPFSFSAL_write(int fd, uint64_t offset, size_t buf_size, caddr_t buf,
size_t *write_amount, bool *fsal_stable,
const struct req_op_context *op_ctx, int expfd)
{
struct write_arg warg = {0};
uint32_t stability_got = 0;
ssize_t nb_write;
int errsv;
/* sanity checks. */
if (!buf || !write_amount)
return fsalstat(ERR_FSAL_FAULT, 0);
warg.mountdirfd = expfd;
warg.fd = fd;
warg.bufP = buf;
warg.offset = offset;
warg.length = buf_size;
warg.stability_wanted = *fsal_stable;
warg.stability_got = &stability_got;
warg.options = 0;
fsal_set_credentials(op_ctx->creds);
nb_write = gpfs_ganesha(OPENHANDLE_WRITE_BY_FD, &warg);
errsv = errno;
fsal_restore_ganesha_credentials();
if (nb_write == -1) {
if (errsv == EUNATCH)
LogFatal(COMPONENT_FSAL, "GPFS Returned EUNATCH");
return fsalstat(posix2fsal_error(errsv), errsv);
}
*write_amount = nb_write;
*fsal_stable = (stability_got) ? true : false;
return fsalstat(ERR_FSAL_NO_ERROR, 0);
}
/** @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_alloc(int fd, uint64_t offset, uint64_t length, bool allocate)
* @brief Perform a de/allocc operation on an opened file.
* @param fd The file descriptor returned by FSAL_open.
* @param offset Offset
* @param length Length
* @param allocate Allocate
*
* @return ERR_FSAL_NO_ERROR on success, error otherwise
*/
fsal_status_t
GPFSFSAL_alloc(int fd, uint64_t offset, uint64_t length, bool allocate)
{
struct alloc_arg aarg = {0};
int errsv;
int rc;
aarg.fd = fd;
aarg.offset = offset;
aarg.length = length;
aarg.options = (allocate) ? IO_ALLOCATE : IO_DEALLOCATE;
fsal_set_credentials(op_ctx->creds);
rc = gpfs_ganesha(OPENHANDLE_ALLOCATE_BY_FD, &aarg);
errsv = errno;
fsal_restore_ganesha_credentials();
if (rc == -1) {
if (errsv == EUNATCH)
LogFatal(COMPONENT_FSAL, "GPFS Returned EUNATCH");
return fsalstat(posix2fsal_error(errsv), errsv);
}
return fsalstat(ERR_FSAL_NO_ERROR, 0);
}
/**
* @brief Create a directory.
*
* @param dir_hdl Handle of the parent directory
* @param dir_name Pointer to the name of the directory to be created.
* @param op_ctx Authentication context for the operation (user,...).
* @param accessmode Mode for the directory to be created.
* @param gpfs_fh Pointer to the handle of the created directory.
* @param fsal_attr Attributes of the created directory.
* @return ERR_FSAL_NO_ERROR on success, error otherwise
*
*/
fsal_status_t
GPFSFSAL_mkdir(struct fsal_obj_handle *dir_hdl, const char *dir_name,
const struct req_op_context *op_ctx, uint32_t accessmode,
struct gpfs_file_handle *gpfs_fh, struct attrlist *obj_attr)
{
mode_t unix_mode;
fsal_status_t status;
/* note : obj_attr is optional. */
if (!dir_hdl || !op_ctx || !gpfs_fh || !dir_name)
return fsalstat(ERR_FSAL_FAULT, 0);
/* convert FSAL mode to unix mode. */
unix_mode = fsal2unix_mode(accessmode);
/* Apply umask */
unix_mode = unix_mode &
~op_ctx->fsal_export->exp_ops.fs_umask(op_ctx->fsal_export);
/* build new entry path */
/* creates the directory and get its handle */
fsal_set_credentials(op_ctx->creds);
status = fsal_internal_create(dir_hdl, dir_name, unix_mode | S_IFDIR,
0, gpfs_fh, NULL);
fsal_restore_ganesha_credentials();
if (FSAL_IS_ERROR(status))
return status;
/* retrieve file attributes */
return GPFSFSAL_getattrs(op_ctx->fsal_export,
dir_hdl->fs->private_data,
op_ctx, gpfs_fh, obj_attr);
}
/** @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_status_t vfs_write2(struct fsal_obj_handle *obj_hdl,
bool bypass,
struct state_t *state,
uint64_t offset,
size_t buffer_size,
void *buffer,
size_t *wrote_amount,
bool *fsal_stable,
struct io_info *info)
{
ssize_t nb_written;
fsal_status_t status;
int retval = 0;
int my_fd = -1;
bool has_lock = false;
bool need_fsync = false;
bool closefd = false;
fsal_openflags_t openflags = FSAL_O_WRITE;
if (info != NULL) {
/* Currently we don't support WRITE_PLUS */
return fsalstat(ERR_FSAL_NOTSUPP, 0);
}
if (obj_hdl->fsal != obj_hdl->fs->fsal) {
LogDebug(COMPONENT_FSAL,
"FSAL %s operation for handle belonging to FSAL %s, return EXDEV",
obj_hdl->fsal->name, obj_hdl->fs->fsal->name);
return fsalstat(posix2fsal_error(EXDEV), EXDEV);
}
if (*fsal_stable)
openflags |= FSAL_O_SYNC;
/* Get a usable file descriptor */
status = find_fd(&my_fd, obj_hdl, bypass, state, openflags,
&has_lock, &need_fsync, &closefd, false);
if (FSAL_IS_ERROR(status)) {
LogDebug(COMPONENT_FSAL,
"find_fd failed %s", msg_fsal_err(status.major));
goto out;
}
fsal_set_credentials(op_ctx->creds);
nb_written = pwrite(my_fd, buffer, buffer_size, offset);
if (nb_written == -1) {
retval = errno;
status = fsalstat(posix2fsal_error(retval), retval);
goto out;
}
*wrote_amount = nb_written;
/* attempt stability if we aren't using an O_SYNC fd */
if (need_fsync) {
retval = fsync(my_fd);
if (retval == -1) {
retval = errno;
status = fsalstat(posix2fsal_error(retval), retval);
}
}
out:
if (closefd)
close(my_fd);
if (has_lock)
PTHREAD_RWLOCK_unlock(&obj_hdl->lock);
fsal_restore_ganesha_credentials();
return status;
}
static fsal_status_t makenode(struct fsal_obj_handle *dir_hdl,
const char *name,
object_file_type_t nodetype, /* IN */
fsal_dev_t *dev, /* IN */
struct attrlist *attrib,
struct fsal_obj_handle **handle)
{
struct vfs_fsal_obj_handle *myself, *hdl;
int dir_fd = -1;
struct stat stat;
mode_t unix_mode, create_mode = 0;
fsal_errors_t fsal_error = ERR_FSAL_NO_ERROR;
int retval = 0;
uid_t user;
gid_t group;
dev_t unix_dev = 0;
int flags = O_PATH | O_NOACCESS;
vfs_file_handle_t *fh = NULL;
vfs_alloc_handle(fh);
LogDebug(COMPONENT_FSAL, "create %s", name);
*handle = NULL; /* poison it */
if (!dir_hdl->obj_ops.handle_is(dir_hdl, DIRECTORY)) {
LogCrit(COMPONENT_FSAL,
"Parent handle is not a directory. hdl = 0x%p",
dir_hdl);
return fsalstat(ERR_FSAL_NOTDIR, 0);
}
myself = container_of(dir_hdl, struct vfs_fsal_obj_handle, obj_handle);
if (dir_hdl->fsal != dir_hdl->fs->fsal) {
LogDebug(COMPONENT_FSAL,
"FSAL %s operation for handle belonging to FSAL %s, return EXDEV",
dir_hdl->fsal->name,
dir_hdl->fs->fsal != NULL
? dir_hdl->fs->fsal->name
: "(none)");
retval = EXDEV;
goto hdlerr;
}
user = attrib->owner;
group = attrib->group;
unix_mode = fsal2unix_mode(attrib->mode)
& ~op_ctx->fsal_export->exp_ops.fs_umask(op_ctx->fsal_export);
switch (nodetype) {
case BLOCK_FILE:
create_mode = S_IFBLK;
unix_dev = makedev(dev->major, dev->minor);
break;
case CHARACTER_FILE:
create_mode = S_IFCHR;
unix_dev = makedev(dev->major, dev->minor);
break;
case FIFO_FILE:
create_mode = S_IFIFO;
break;
case SOCKET_FILE:
create_mode = S_IFSOCK;
break;
default:
LogMajor(COMPONENT_FSAL, "Invalid node type in FSAL_mknode: %d",
nodetype);
fsal_error = ERR_FSAL_INVAL;
goto errout;
}
dir_fd = vfs_fsal_open(myself, flags, &fsal_error);
if (dir_fd < 0)
goto errout;
retval = vfs_stat_by_handle(dir_fd, myself->handle, &stat, flags);
if (retval < 0) {
retval = errno;
goto direrr;
}
if (stat.st_mode & S_ISGID)
group = -1; /*setgid bit on dir propagates dir group owner */
/* create it with no access because we are root when we do this */
fsal_set_credentials(op_ctx->creds);
retval = mknodat(dir_fd, name, create_mode, unix_dev);
if (retval < 0) {
retval = errno;
fsal_restore_ganesha_credentials();
goto direrr;
}
fsal_restore_ganesha_credentials();
retval = make_file_safe(myself, op_ctx, dir_fd, name,
unix_mode, user, group, &hdl);
if (!retval) {
close(dir_fd); /* done with parent */
*handle = &hdl->obj_handle;
return fsalstat(ERR_FSAL_NO_ERROR, 0);
}
unlinkat(dir_fd, name, 0);
direrr:
close(dir_fd); /* done with parent */
hdlerr:
fsal_error = posix2fsal_error(retval);
errout:
return fsalstat(fsal_error, retval);
}
/**
* 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 setgid_bit = 0; */
mode_t unix_mode;
fsal_status_t status;
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;
/* 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_mkdir);
/* 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);
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_mkdir);
/* build new entry path */
/* creates the directory and get its handle */
fsal_set_credentials(p_context);
TakeTokenFSCall();
status = fsal_internal_create(p_context, p_parent_directory_handle,
p_dirname, unix_mode | S_IFDIR, 0,
p_object_handle, NULL);
ReleaseTokenFSCall();
fsal_restore_ganesha_credentials();
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_mkdir);
/* 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);
}
/**
* @brief Create a special object in the filesystem.
*
* @param dir_hdl Handle of the parent dir where the file is to be created.
* @param node_name Pointer to the name of the file to be created.
* @param op_ctx Authentication context for the operation (user,...).
* @param accessmode Mode for the file to be created.
* @param node_type Type of file to create.
* @param dev Device id of file to create.
* @param gpfs_fh Pointer to the handle of the created file.
* @param fsal_attr Attributes of the created file.
* @return ERR_FSAL_NO_ERROR on success, error otherwise
*
*/
fsal_status_t
GPFSFSAL_mknode(struct fsal_obj_handle *dir_hdl, const char *node_name,
const struct req_op_context *op_ctx, uint32_t accessmode,
mode_t nodetype, fsal_dev_t *dev,
struct gpfs_file_handle *gpfs_fh, struct attrlist *fsal_attr)
{
fsal_status_t status;
mode_t unix_mode = 0;
dev_t unix_dev = 0;
/* note : fsal_attr is optional. */
if (!dir_hdl || !op_ctx || !node_name)
return fsalstat(ERR_FSAL_FAULT, 0);
unix_mode = fsal2unix_mode(accessmode);
/* Apply umask */
unix_mode = unix_mode & ~op_ctx->fsal_export->exp_ops.
fs_umask(op_ctx->fsal_export);
switch (nodetype) {
case BLOCK_FILE:
if (!dev)
return fsalstat(ERR_FSAL_FAULT, 0);
unix_mode |= S_IFBLK;
unix_dev = (dev->major << 20) | (dev->minor & 0xFFFFF);
break;
case CHARACTER_FILE:
if (!dev)
return fsalstat(ERR_FSAL_FAULT, 0);
unix_mode |= S_IFCHR;
unix_dev = (dev->major << 20) | (dev->minor & 0xFFFFF);
break;
case SOCKET_FILE:
unix_mode |= S_IFSOCK;
break;
case FIFO_FILE:
unix_mode |= S_IFIFO;
break;
default:
LogMajor(COMPONENT_FSAL, "Invalid node type in FSAL_mknode: %d",
nodetype);
return fsalstat(ERR_FSAL_INVAL, 0);
}
fsal_set_credentials(op_ctx->creds);
status = fsal_internal_mknode(dir_hdl, node_name, unix_mode, unix_dev,
gpfs_fh, NULL);
fsal_restore_ganesha_credentials();
if (FSAL_IS_ERROR(status))
return status;
/* Fills the attributes */
return GPFSFSAL_getattrs(op_ctx->fsal_export,
dir_hdl->fs->private_data,
op_ctx, gpfs_fh, fsal_attr);
}
static fsal_status_t renamefile(struct fsal_obj_handle *obj_hdl,
struct fsal_obj_handle *olddir_hdl,
const char *old_name,
struct fsal_obj_handle *newdir_hdl,
const char *new_name)
{
struct vfs_fsal_obj_handle *olddir, *newdir, *obj;
int oldfd = -1, newfd = -1;
fsal_errors_t fsal_error = ERR_FSAL_NO_ERROR;
int retval = 0;
olddir =
container_of(olddir_hdl, struct vfs_fsal_obj_handle, obj_handle);
if (olddir_hdl->fsal != olddir_hdl->fs->fsal) {
LogDebug(COMPONENT_FSAL,
"FSAL %s operation for handle belonging to FSAL %s, return EXDEV",
olddir_hdl->fsal->name,
olddir_hdl->fs->fsal != NULL
? olddir_hdl->fs->fsal->name
: "(none)");
retval = EXDEV;
fsal_error = posix2fsal_error(retval);
goto out;
}
oldfd = vfs_fsal_open(olddir, O_PATH | O_NOACCESS, &fsal_error);
if (oldfd < 0) {
retval = -oldfd;
goto out;
}
newdir =
container_of(newdir_hdl, struct vfs_fsal_obj_handle, obj_handle);
if (newdir_hdl->fsal != newdir_hdl->fs->fsal) {
LogDebug(COMPONENT_FSAL,
"FSAL %s operation for handle belonging to FSAL %s, return EXDEV",
newdir_hdl->fsal->name,
newdir_hdl->fs->fsal != NULL
? newdir_hdl->fs->fsal->name
: "(none)");
retval = EXDEV;
fsal_error = posix2fsal_error(retval);
goto out;
}
obj = container_of(obj_hdl, struct vfs_fsal_obj_handle, obj_handle);
newfd = vfs_fsal_open(newdir, O_PATH | O_NOACCESS, &fsal_error);
if (newfd < 0) {
retval = -newfd;
goto out;
}
/* Become the user because we are creating/removing objects
* in these dirs which messes with quotas and perms.
*/
fsal_set_credentials(op_ctx->creds);
retval = renameat(oldfd, old_name, newfd, new_name);
if (retval < 0) {
retval = errno;
fsal_error = posix2fsal_error(retval);
} else if (vfs_unopenable_type(obj->obj_handle.type)) {
/* A block, char, or socket has been renamed. Fixup
* our information in the handle so we can still stat it.
* Save the name in case we have to sort of undo.
*/
char *saved_name = obj->u.unopenable.name;
memcpy(obj->u.unopenable.dir, newdir->handle,
sizeof(vfs_file_handle_t));
obj->u.unopenable.name = gsh_strdup(new_name);
if (obj->u.unopenable.name != NULL) {
/* Discard saved_name */
gsh_free(saved_name);
} else {
/* It's a bad day, we're going to be messed up
* no matter what we try and do, maybe leave
* things not completely hosed.
*/
LogCrit(COMPONENT_FSAL,
"Failed to allocate memory to rename special inode from %s to %s",
old_name, new_name);
obj->u.unopenable.name = saved_name;
}
}
fsal_restore_ganesha_credentials();
out:
if (oldfd >= 0)
close(oldfd);
if (newfd >= 0)
close(newfd);
return fsalstat(fsal_error, retval);
}
static fsal_status_t makesymlink(struct fsal_obj_handle *dir_hdl,
const char *name, const char *link_path,
struct attrlist *attrib,
struct fsal_obj_handle **handle)
{
struct vfs_fsal_obj_handle *myself, *hdl;
int dir_fd = -1;
struct stat stat;
fsal_errors_t fsal_error = ERR_FSAL_NO_ERROR;
int retval = 0;
int flags = O_PATH | O_NOACCESS;
vfs_file_handle_t *fh = NULL;
vfs_alloc_handle(fh);
LogDebug(COMPONENT_FSAL, "create %s", name);
*handle = NULL; /* poison it first */
if (!dir_hdl->obj_ops.handle_is(dir_hdl, DIRECTORY)) {
LogCrit(COMPONENT_FSAL,
"Parent handle is not a directory. hdl = 0x%p",
dir_hdl);
return fsalstat(ERR_FSAL_NOTDIR, 0);
}
myself = container_of(dir_hdl, struct vfs_fsal_obj_handle, obj_handle);
if (dir_hdl->fsal != dir_hdl->fs->fsal) {
LogDebug(COMPONENT_FSAL,
"FSAL %s operation for handle belonging to FSAL %s, return EXDEV",
dir_hdl->fsal->name,
dir_hdl->fs->fsal != NULL
? dir_hdl->fs->fsal->name
: "(none)");
retval = EXDEV;
goto hdlerr;
}
dir_fd = vfs_fsal_open(myself, flags, &fsal_error);
if (dir_fd < 0)
return fsalstat(fsal_error, -dir_fd);
flags |= O_NOFOLLOW; /* BSD needs O_NOFOLLOW for
* fhopen() of symlinks */
retval = vfs_stat_by_handle(dir_fd, myself->handle, &stat, flags);
if (retval < 0) {
retval = errno;
goto direrr;
}
/* Become the user because we are creating an object in this dir.
*/
fsal_set_credentials(op_ctx->creds);
retval = symlinkat(link_path, dir_fd, name);
if (retval < 0) {
retval = errno;
fsal_restore_ganesha_credentials();
goto direrr;
}
fsal_restore_ganesha_credentials();
retval = vfs_name_to_handle(dir_fd, dir_hdl->fs, name, fh);
if (retval < 0) {
retval = errno;
goto linkerr;
}
/* now get attributes info,
* being careful to get the link, not the target */
retval = fstatat(dir_fd, name, &stat, AT_SYMLINK_NOFOLLOW);
if (retval < 0) {
retval = errno;
goto linkerr;
}
/* allocate an obj_handle and fill it up */
hdl = alloc_handle(dir_fd, fh, dir_hdl->fs, &stat, NULL, name,
op_ctx->fsal_export);
if (hdl == NULL) {
retval = ENOMEM;
goto linkerr;
}
*handle = &hdl->obj_handle;
close(dir_fd);
return fsalstat(ERR_FSAL_NO_ERROR, 0);
linkerr:
unlinkat(dir_fd, name, 0);
direrr:
close(dir_fd);
hdlerr:
if (retval == ENOENT)
fsal_error = ERR_FSAL_STALE;
else
fsal_error = posix2fsal_error(retval);
return fsalstat(fsal_error, retval);
}
/**
* 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 ] */
)
{
fsal_status_t status;
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);
/* 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 */
/* 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);
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_create);
/* call to filesystem */
fsal_set_credentials(p_context);
TakeTokenFSCall();
status = fsal_internal_create(p_context, p_parent_directory_handle,
p_filename, unix_mode | S_IFREG, 0,
p_object_handle, NULL);
ReleaseTokenFSCall();
fsal_restore_ganesha_credentials();
if(FSAL_IS_ERROR(status))
ReturnStatus(status, 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);
}
}
// error injection to test DRC
//sleep(61);
/* OK */
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_create);
}
fsal_status_t vfs_open2(struct fsal_obj_handle *obj_hdl,
struct state_t *state,
fsal_openflags_t openflags,
enum fsal_create_mode createmode,
const char *name,
struct attrlist *attrib_set,
fsal_verifier_t verifier,
struct fsal_obj_handle **new_obj,
struct attrlist *attrs_out,
bool *caller_perm_check)
{
int posix_flags = 0;
int fd, dir_fd;
int retval = 0;
mode_t unix_mode;
fsal_status_t status = {0, 0};
struct vfs_fd *my_fd = NULL;
struct vfs_fsal_obj_handle *myself, *hdl = NULL;
struct stat stat;
vfs_file_handle_t *fh = NULL;
bool truncated;
bool created = false;
if (state != NULL)
my_fd = (struct vfs_fd *)(state + 1);
myself = container_of(obj_hdl, struct vfs_fsal_obj_handle, obj_handle);
LogAttrlist(COMPONENT_FSAL, NIV_FULL_DEBUG,
"attrib_set ", attrib_set, false);
fsal2posix_openflags(openflags, &posix_flags);
truncated = (posix_flags & O_TRUNC) != 0;
LogFullDebug(COMPONENT_FSAL,
truncated ? "Truncate" : "No truncate");
if (createmode >= FSAL_EXCLUSIVE) {
/* Now fixup attrs for verifier if exclusive create */
set_common_verifier(attrib_set, verifier);
}
if (name == NULL) {
/* This is an open by handle */
struct vfs_fsal_obj_handle *myself;
myself = container_of(obj_hdl,
struct vfs_fsal_obj_handle,
obj_handle);
if (obj_hdl->fsal != obj_hdl->fs->fsal) {
LogDebug(COMPONENT_FSAL,
"FSAL %s operation for handle belonging to FSAL %s, return EXDEV",
obj_hdl->fsal->name, obj_hdl->fs->fsal->name);
return fsalstat(posix2fsal_error(EXDEV), EXDEV);
}
if (state != NULL) {
/* Prepare to take the share reservation, but only if we
* are called with a valid state (if state is NULL the
* caller is a stateless create such as NFS v3 CREATE).
*/
/* This can block over an I/O operation. */
PTHREAD_RWLOCK_wrlock(&obj_hdl->lock);
/* Check share reservation conflicts. */
status = check_share_conflict(&myself->u.file.share,
openflags,
false);
if (FSAL_IS_ERROR(status)) {
PTHREAD_RWLOCK_unlock(&obj_hdl->lock);
return status;
}
/* Take the share reservation now by updating the
* counters.
*/
update_share_counters(&myself->u.file.share,
FSAL_O_CLOSED,
openflags);
PTHREAD_RWLOCK_unlock(&obj_hdl->lock);
} else {
/* We need to use the global fd to continue, and take
* the lock to protect it.
*/
my_fd = &hdl->u.file.fd;
PTHREAD_RWLOCK_wrlock(&obj_hdl->lock);
}
status = vfs_open_my_fd(myself, openflags, posix_flags, my_fd);
if (FSAL_IS_ERROR(status)) {
if (state == NULL) {
/* Release the lock taken above, and return
* since there is nothing to undo.
*/
PTHREAD_RWLOCK_unlock(&obj_hdl->lock);
return status;
} else {
/* Error - need to release the share */
goto undo_share;
}
}
if (createmode >= FSAL_EXCLUSIVE || truncated) {
/* Refresh the attributes */
struct stat stat;
retval = fstat(my_fd->fd, &stat);
if (retval == 0) {
LogFullDebug(COMPONENT_FSAL,
"New size = %" PRIx64,
stat.st_size);
} else {
if (errno == EBADF)
errno = ESTALE;
status = fsalstat(posix2fsal_error(errno),
errno);
}
/* Now check verifier for exclusive, but not for
* FSAL_EXCLUSIVE_9P.
*/
if (!FSAL_IS_ERROR(status) &&
createmode >= FSAL_EXCLUSIVE &&
createmode != FSAL_EXCLUSIVE_9P &&
!check_verifier_stat(&stat, verifier)) {
/* Verifier didn't match, return EEXIST */
status =
fsalstat(posix2fsal_error(EEXIST), EEXIST);
}
}
if (state == NULL) {
/* If no state, release the lock taken above and return
* status.
*/
PTHREAD_RWLOCK_unlock(&obj_hdl->lock);
return status;
}
if (!FSAL_IS_ERROR(status)) {
/* Return success. */
return status;
}
(void) vfs_close_my_fd(my_fd);
undo_share:
/* Can only get here with state not NULL and an error */
/* On error we need to release our share reservation
* and undo the update of the share counters.
* This can block over an I/O operation.
*/
PTHREAD_RWLOCK_wrlock(&obj_hdl->lock);
update_share_counters(&myself->u.file.share,
openflags,
FSAL_O_CLOSED);
PTHREAD_RWLOCK_unlock(&obj_hdl->lock);
return status;
}
/* In this path where we are opening by name, we can't check share
* reservation yet since we don't have an object_handle yet. If we
* indeed create the object handle (there is no race with another
* open by name), then there CAN NOT be a share conflict, otherwise
* the share conflict will be resolved when the object handles are
* merged.
*/
#ifdef ENABLE_VFS_DEBUG_ACL
if (createmode != FSAL_NO_CREATE) {
/* Need to ammend attributes for inherited ACL, these will be
* set later. We also need to test for permission to create
* since there might be an ACL.
*/
struct attrlist attrs;
fsal_accessflags_t access_type;
access_type = FSAL_MODE_MASK_SET(FSAL_W_OK) |
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_ADD_FILE);
status = obj_hdl->obj_ops.test_access(obj_hdl, access_type,
NULL, NULL, false);
if (FSAL_IS_ERROR(status))
return status;
fsal_prepare_attrs(&attrs, ATTR_ACL);
status = obj_hdl->obj_ops.getattrs(obj_hdl, &attrs);
if (FSAL_IS_ERROR(status))
return status;
status.major = fsal_inherit_acls(attrib_set, attrs.acl,
FSAL_ACE_FLAG_FILE_INHERIT);
/* Done with the attrs */
fsal_release_attrs(&attrs);
if (FSAL_IS_ERROR(status))
return status;
}
#endif /* ENABLE_VFS_DEBUG_ACL */
if (createmode != FSAL_NO_CREATE) {
/* Now add in O_CREAT and O_EXCL. */
posix_flags |= O_CREAT;
/* And if we are at least FSAL_GUARDED, do an O_EXCL create. */
if (createmode >= FSAL_GUARDED)
posix_flags |= O_EXCL;
/* Fetch the mode attribute to use in the openat system call. */
unix_mode = fsal2unix_mode(attrib_set->mode) &
~op_ctx->fsal_export->exp_ops.fs_umask(op_ctx->fsal_export);
/* Don't set the mode if we later set the attributes */
FSAL_UNSET_MASK(attrib_set->mask, ATTR_MODE);
}
if (createmode == FSAL_UNCHECKED && (attrib_set->mask != 0)) {
/* If we have FSAL_UNCHECKED and want to set more attributes
* than the mode, we attempt an O_EXCL create first, if that
* succeeds, then we will be allowed to set the additional
* attributes, otherwise, we don't know we created the file
* and this can NOT set the attributes.
*/
posix_flags |= O_EXCL;
}
dir_fd = vfs_fsal_open(myself, O_PATH | O_NOACCESS, &status.major);
if (dir_fd < 0)
return fsalstat(status.major, -dir_fd);
/** @todo: not sure what this accomplishes... */
retval = vfs_stat_by_handle(dir_fd, &stat);
if (retval < 0) {
retval = errno;
status = fsalstat(posix2fsal_error(retval), retval);
goto direrr;
}
/* Become the user because we are creating an object in this dir.
*/
if (createmode != FSAL_NO_CREATE)
fsal_set_credentials(op_ctx->creds);
if ((posix_flags & O_CREAT) != 0)
fd = openat(dir_fd, name, posix_flags, unix_mode);
else
fd = openat(dir_fd, name, posix_flags);
if (fd == -1 && errno == EEXIST && createmode == FSAL_UNCHECKED) {
/* We tried to create O_EXCL to set attributes and failed.
* Remove O_EXCL and retry. We still try O_CREAT again just in
* case file disappears out from under us.
*
* Note that because we have dropped O_EXCL, later on we will
* not assume we created the file, and thus will not set
* additional attributes. We don't need to separately track
* the condition of not wanting to set attributes.
*/
posix_flags &= ~O_EXCL;
fd = openat(dir_fd, name, posix_flags, unix_mode);
}
/* Preserve errno */
retval = errno;
/* If we were creating, restore credentials now. */
if (createmode != FSAL_NO_CREATE)
fsal_restore_ganesha_credentials();
if (fd < 0) {
status = fsalstat(posix2fsal_error(retval), retval);
goto direrr;
}
/* Remember if we were responsible for creating the file.
* Note that in an UNCHECKED retry we MIGHT have re-created the
* file and won't remember that. Oh well, so in that rare case we
* leak a partially created file if we have a subsequent error in here.
* Also notify caller to do permission check if we DID NOT create the
* file. Note it IS possible in the case of a race between an UNCHECKED
* open and an external unlink, we did create the file, but we will
* still force a permission check. Of course that permission check
* SHOULD succeed since we also won't set the mode the caller requested
* and the default file create permissions SHOULD allow the owner
* read/write.
*/
created = (posix_flags & O_EXCL) != 0;
*caller_perm_check = !created;
vfs_alloc_handle(fh);
retval = vfs_name_to_handle(dir_fd, obj_hdl->fs, name, fh);
if (retval < 0) {
retval = errno;
status = fsalstat(posix2fsal_error(retval), retval);
goto fileerr;
}
retval = fstat(fd, &stat);
if (retval < 0) {
retval = errno;
status = fsalstat(posix2fsal_error(retval), retval);
goto fileerr;
}
/* allocate an obj_handle and fill it up */
hdl = alloc_handle(dir_fd, fh, obj_hdl->fs, &stat, myself->handle, name,
op_ctx->fsal_export);
if (hdl == NULL) {
status = fsalstat(posix2fsal_error(ENOMEM), ENOMEM);
goto fileerr;
}
/* If we didn't have a state above, use the global fd. At this point,
* since we just created the global fd, no one else can have a
* reference to it, and thus we can mamnipulate unlocked which is
* handy since we can then call setattr2 which WILL take the lock
* without a double locking deadlock.
*/
if (my_fd == NULL)
my_fd = &hdl->u.file.fd;
my_fd->fd = fd;
my_fd->openflags = openflags;
*new_obj = &hdl->obj_handle;
if (created && attrib_set->mask != 0) {
/* Set attributes using our newly opened file descriptor as the
* share_fd if there are any left to set (mode and truncate
* have already been handled).
*
* Note that we only set the attributes if we were responsible
* for creating the file and we have attributes to set.
*
* Note if we have ENABLE_VFS_DEBUG_ACL an inherited ACL might
* be part of the attributes we are setting here.
*/
status = (*new_obj)->obj_ops.setattr2(*new_obj,
false,
state,
attrib_set);
if (FSAL_IS_ERROR(status)) {
/* Release the handle we just allocated. */
(*new_obj)->obj_ops.release(*new_obj);
*new_obj = NULL;
goto fileerr;
}
if (attrs_out != NULL) {
status = (*new_obj)->obj_ops.getattrs(*new_obj,
attrs_out);
if (FSAL_IS_ERROR(status) &&
(attrs_out->mask & ATTR_RDATTR_ERR) == 0) {
/* Get attributes failed and caller expected
* to get the attributes. Otherwise continue
* with attrs_out indicating ATTR_RDATTR_ERR.
*/
goto fileerr;
}
}
} else if (attrs_out != NULL) {
/* Since we haven't set any attributes other than what was set
* on create (if we even created), just use the stat results
* we used to create the fsal_obj_handle.
*/
posix2fsal_attributes(&stat, attrs_out);
/* Make sure ATTR_RDATTR_ERR is cleared on success. */
attrs_out->mask &= ~ATTR_RDATTR_ERR;
}
close(dir_fd);
if (state != NULL) {
/* Prepare to take the share reservation, but only if we are
* called with a valid state (if state is NULL the caller is
* a stateless create such as NFS v3 CREATE).
*/
/* This can block over an I/O operation. */
PTHREAD_RWLOCK_wrlock(&(*new_obj)->lock);
/* Take the share reservation now by updating the counters. */
update_share_counters(&hdl->u.file.share,
FSAL_O_CLOSED,
openflags);
PTHREAD_RWLOCK_unlock(&(*new_obj)->lock);
}
return fsalstat(ERR_FSAL_NO_ERROR, 0);
fileerr:
close(fd);
/* Delete the file if we actually created it. */
if (created)
unlinkat(dir_fd, name, 0);
direrr:
close(dir_fd);
return fsalstat(posix2fsal_error(retval), retval);
}
static struct closefd vfs_fsal_open_and_stat(struct fsal_export *exp,
struct vfs_fsal_obj_handle *myself,
struct stat *stat, int open_flags,
fsal_errors_t *fsal_error)
{
struct fsal_obj_handle *obj_hdl = &myself->obj_handle;
struct closefd cfd = { .fd = -1, .close_fd = false };
int retval = 0;
vfs_file_handle_t *fh = NULL;
vfs_alloc_handle(fh);
const char *func = "unknown";
struct vfs_filesystem *vfs_fs = myself->obj_handle.fs->private;
switch (obj_hdl->type) {
case SOCKET_FILE:
case CHARACTER_FILE:
case BLOCK_FILE:
cfd.fd = vfs_open_by_handle(vfs_fs,
myself->u.unopenable.dir,
O_PATH | O_NOACCESS,
fsal_error);
if (cfd.fd < 0) {
LogDebug(COMPONENT_FSAL,
"Failed with %s open_flags 0x%08x",
strerror(-cfd.fd), O_PATH | O_NOACCESS);
return cfd;
}
cfd.close_fd = true;
retval =
fstatat(cfd.fd, myself->u.unopenable.name, stat,
AT_SYMLINK_NOFOLLOW);
func = "fstatat";
break;
case REGULAR_FILE:
if (myself->u.file.openflags == FSAL_O_CLOSED) {
/* no file open at the moment */
cfd.fd = vfs_fsal_open(myself, open_flags, fsal_error);
if (cfd.fd < 0) {
LogDebug(COMPONENT_FSAL,
"Failed with %s open_flags 0x%08x",
strerror(-cfd.fd), open_flags);
return cfd;
}
cfd.close_fd = true;
} else {
cfd.fd = myself->u.file.fd;
}
retval = fstat(cfd.fd, stat);
func = "fstat";
break;
case SYMBOLIC_LINK:
open_flags |= (O_PATH | O_RDWR | O_NOFOLLOW);
goto vfos_open;
case FIFO_FILE:
open_flags |= O_NONBLOCK;
/* fall through */
case DIRECTORY:
default:
vfos_open:
cfd.fd = vfs_fsal_open(myself, open_flags, fsal_error);
if (cfd.fd < 0) {
LogDebug(COMPONENT_FSAL,
"Failed with %s open_flags 0x%08x",
strerror(-cfd.fd), open_flags);
return cfd;
}
cfd.close_fd = true;
retval = vfs_stat_by_handle(cfd.fd, myself->handle,
stat, open_flags);
func = "vfs_stat_by_handle";
break;
}
if (retval < 0) {
retval = errno;
if (cfd.close_fd) {
int rc;
rc = close(cfd.fd);
if (rc < 0) {
rc = errno;
LogDebug(COMPONENT_FSAL, "close failed with %s",
strerror(rc));
}
}
if (retval == ENOENT)
retval = ESTALE;
*fsal_error = posix2fsal_error(retval);
LogDebug(COMPONENT_FSAL, "%s failed with %s", func,
strerror(retval));
cfd.fd = -retval;
cfd.close_fd = false;
return cfd;
}
return cfd;
}
static fsal_status_t getattrs(struct fsal_obj_handle *obj_hdl)
{
struct vfs_fsal_obj_handle *myself;
struct closefd cfd = { .fd = -1, .close_fd = false };
struct stat stat;
fsal_errors_t fsal_error = ERR_FSAL_NO_ERROR;
fsal_status_t st;
int retval = 0;
myself = container_of(obj_hdl, struct vfs_fsal_obj_handle, obj_handle);
if (obj_hdl->fsal != obj_hdl->fs->fsal) {
LogDebug(COMPONENT_FSAL,
"FSAL %s getattr for handle belonging to FSAL %s, ignoring",
obj_hdl->fsal->name,
obj_hdl->fs->fsal != NULL
? obj_hdl->fs->fsal->name
: "(none)");
goto out;
}
cfd = vfs_fsal_open_and_stat(op_ctx->fsal_export, myself, &stat,
O_RDONLY, &fsal_error);
if (cfd.fd >= 0) {
st = posix2fsal_attributes(&stat, &obj_hdl->attributes);
if (cfd.close_fd)
close(cfd.fd);
if (FSAL_IS_ERROR(st)) {
FSAL_CLEAR_MASK(obj_hdl->attributes.mask);
FSAL_SET_MASK(obj_hdl->attributes.mask,
ATTR_RDATTR_ERR);
fsal_error = st.major;
retval = st.minor;
} else {
obj_hdl->attributes.fsid = obj_hdl->fs->fsid;
}
} else {
LogDebug(COMPONENT_FSAL, "Failed with %s, fsal_error %s",
strerror(-cfd.fd),
fsal_error ==
ERR_FSAL_STALE ? "ERR_FSAL_STALE" : "other");
if (obj_hdl->type == SYMBOLIC_LINK
&& cfd.fd == -EPERM) {
/* You cannot open_by_handle (XFS on linux) a symlink
* and it throws an EPERM error for it.
* open_by_handle_at does not throw that error for
* symlinks so we play a game here. Since there is
* not much we can do with symlinks anyway,
* say that we did it but don't actually
* do anything. In this case, return the stat we got
* at lookup time. If you *really* want to tweek things
* like owners, get a modern linux kernel...
*/
fsal_error = ERR_FSAL_NO_ERROR;
goto out;
}
retval = -cfd.fd;
}
out:
return fsalstat(fsal_error, retval);
}
/*
* NOTE: this is done under protection of the attributes rwlock
* in the cache entry.
*/
static fsal_status_t setattrs(struct fsal_obj_handle *obj_hdl,
struct attrlist *attrs)
{
struct vfs_fsal_obj_handle *myself;
struct closefd cfd = { .fd = -1, .close_fd = false };
struct stat stat;
fsal_errors_t fsal_error = ERR_FSAL_NO_ERROR;
int retval = 0;
int open_flags = O_RDONLY;
/* apply umask, if mode attribute is to be changed */
if (FSAL_TEST_MASK(attrs->mask, ATTR_MODE))
attrs->mode &= ~op_ctx->fsal_export->exp_ops.
fs_umask(op_ctx->fsal_export);
myself = container_of(obj_hdl, struct vfs_fsal_obj_handle, obj_handle);
if (obj_hdl->fsal != obj_hdl->fs->fsal) {
LogDebug(COMPONENT_FSAL,
"FSAL %s operation for handle belonging to FSAL %s, return EXDEV",
obj_hdl->fsal->name,
obj_hdl->fs->fsal != NULL
? obj_hdl->fs->fsal->name
: "(none)");
retval = EXDEV;
fsal_error = posix2fsal_error(retval);
goto hdlerr;
}
/* This is yet another "you can't get there from here". If this object
* is a socket (AF_UNIX), an fd on the socket s useless _period_.
* If it is for a symlink, without O_PATH, you will get an ELOOP error
* and (f)chmod doesn't work for a symlink anyway - not that it matters
* because access checking is not done on the symlink but the final
* target.
* AF_UNIX sockets are also ozone material. If the socket is already
* active listeners et al, you can manipulate the mode etc. If it is
* just sitting there as in you made it with a mknod.
* (one of those leaky abstractions...)
* or the listener forgot to unlink it, it is lame duck.
*/
if (FSAL_TEST_MASK(attrs->mask, ATTR_SIZE))
open_flags = O_RDWR;
cfd = vfs_fsal_open_and_stat(op_ctx->fsal_export, myself, &stat,
open_flags, &fsal_error);
if (cfd.fd < 0) {
if (obj_hdl->type == SYMBOLIC_LINK &&
cfd.fd == -EPERM) {
/* You cannot open_by_handle (XFS) a symlink and it
* throws an EPERM error for it. open_by_handle_at
* does not throw that error for symlinks so we play a
* game here. Since there is not much we can do with
* symlinks anyway, say that we did it
* but don't actually do anything.
* If you *really* want to tweek things
* like owners, get a modern linux kernel...
*/
fsal_error = ERR_FSAL_NO_ERROR;
goto out;
}
return fsalstat(fsal_error, cfd.fd);
}
/** TRUNCATE **/
if (FSAL_TEST_MASK(attrs->mask, ATTR_SIZE)) {
if (obj_hdl->type != REGULAR_FILE) {
fsal_error = ERR_FSAL_INVAL;
goto fileerr;
}
retval = ftruncate(cfd.fd, attrs->filesize);
if (retval != 0) {
/* XXX ESXi volume creation pattern reliably
* reaches this point and reliably can successfully
* ftruncate on reopen. I don't know yet if fd if
* we failed to handle a previous error, or what.
* I don't see a prior failed op in wireshark. */
if (retval == -1 /* bad fd */) {
vfs_close(obj_hdl);
if (cfd.close_fd)
close(cfd.fd);
cfd = vfs_fsal_open_and_stat(
op_ctx->fsal_export,
myself, &stat,
open_flags,
&fsal_error);
retval = ftruncate(cfd.fd, attrs->filesize);
if (retval != 0)
goto fileerr;
} else
goto fileerr;
}
}
/** CHMOD **/
if (FSAL_TEST_MASK(attrs->mask, ATTR_MODE)) {
/* The POSIX chmod call doesn't affect the symlink object, but
* the entry it points to. So we must ignore it.
*/
if (!S_ISLNK(stat.st_mode)) {
if (vfs_unopenable_type(obj_hdl->type))
retval = fchmodat(cfd.fd,
myself->u.unopenable.name,
fsal2unix_mode(attrs->mode),
0);
else
retval = fchmod(cfd.fd,
fsal2unix_mode(attrs->mode));
if (retval != 0)
goto fileerr;
}
}
/** CHOWN **/
if (FSAL_TEST_MASK(attrs->mask, ATTR_OWNER | ATTR_GROUP)) {
uid_t user = FSAL_TEST_MASK(attrs->mask, ATTR_OWNER)
? (int)attrs->owner : -1;
gid_t group = FSAL_TEST_MASK(attrs->mask, ATTR_GROUP)
? (int)attrs->group : -1;
if (vfs_unopenable_type(obj_hdl->type))
retval = fchownat(cfd.fd, myself->u.unopenable.name,
user, group, AT_SYMLINK_NOFOLLOW);
else if (obj_hdl->type == SYMBOLIC_LINK)
retval = fchownat(cfd.fd, "", user, group,
AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH);
else
retval = fchown(cfd.fd, user, group);
if (retval)
goto fileerr;
}
/** UTIME **/
if (FSAL_TEST_MASK
(attrs->mask,
ATTR_ATIME | ATTR_MTIME | ATTR_ATIME_SERVER | ATTR_MTIME_SERVER)) {
struct timespec timebuf[2];
if (obj_hdl->type == SYMBOLIC_LINK)
goto out; /* Setting time on symlinks is illegal */
/* Atime */
if (FSAL_TEST_MASK(attrs->mask, ATTR_ATIME_SERVER)) {
timebuf[0].tv_sec = 0;
timebuf[0].tv_nsec = UTIME_NOW;
} else if (FSAL_TEST_MASK(attrs->mask, ATTR_ATIME)) {
timebuf[0] = attrs->atime;
} else {
timebuf[0].tv_sec = 0;
timebuf[0].tv_nsec = UTIME_OMIT;
}
/* Mtime */
if (FSAL_TEST_MASK(attrs->mask, ATTR_MTIME_SERVER)) {
timebuf[1].tv_sec = 0;
timebuf[1].tv_nsec = UTIME_NOW;
} else if (FSAL_TEST_MASK(attrs->mask, ATTR_MTIME)) {
timebuf[1] = attrs->mtime;
} else {
timebuf[1].tv_sec = 0;
timebuf[1].tv_nsec = UTIME_OMIT;
}
if (vfs_unopenable_type(obj_hdl->type))
retval = vfs_utimesat(cfd.fd, myself->u.unopenable.name,
timebuf, AT_SYMLINK_NOFOLLOW);
else
retval = vfs_utimes(cfd.fd, timebuf);
if (retval != 0)
goto fileerr;
}
goto out;
fileerr:
retval = errno;
fsal_error = posix2fsal_error(retval);
out:
if (cfd.close_fd)
close(cfd.fd);
hdlerr:
return fsalstat(fsal_error, retval);
}
/* file_unlink
* unlink the named file in the directory
*/
static fsal_status_t file_unlink(struct fsal_obj_handle *dir_hdl,
const char *name)
{
struct vfs_fsal_obj_handle *myself;
fsal_errors_t fsal_error = ERR_FSAL_NO_ERROR;
struct stat stat;
int fd;
int retval = 0;
myself = container_of(dir_hdl, struct vfs_fsal_obj_handle, obj_handle);
if (dir_hdl->fsal != dir_hdl->fs->fsal) {
LogDebug(COMPONENT_FSAL,
"FSAL %s operation for handle belonging to FSAL %s, return EXDEV",
dir_hdl->fsal->name,
dir_hdl->fs->fsal != NULL
? dir_hdl->fs->fsal->name
: "(none)");
retval = EXDEV;
fsal_error = posix2fsal_error(retval);
goto out;
}
fd = vfs_fsal_open(myself, O_PATH | O_NOACCESS, &fsal_error);
if (fd < 0) {
retval = -fd;
goto out;
}
retval = fstatat(fd, name, &stat, AT_SYMLINK_NOFOLLOW);
if (retval < 0) {
retval = errno;
LogDebug(COMPONENT_FSAL, "fstatat %s failed %s", name,
strerror(retval));
if (retval == ENOENT)
fsal_error = ERR_FSAL_STALE;
else
fsal_error = posix2fsal_error(retval);
goto errout;
}
fsal_set_credentials(op_ctx->creds);
retval = unlinkat(fd, name, (S_ISDIR(stat.st_mode)) ? AT_REMOVEDIR : 0);
if (retval < 0) {
retval = errno;
if (retval == ENOENT)
fsal_error = ERR_FSAL_STALE;
else
fsal_error = posix2fsal_error(retval);
}
fsal_restore_ganesha_credentials();
errout:
close(fd);
out:
return fsalstat(fsal_error, retval);
}
/* handle_digest
* fill in the opaque f/s file handle part.
* we zero the buffer to length first. This MAY already be done above
* at which point, remove memset here because the caller is zeroing
* the whole struct.
*/
static fsal_status_t handle_digest(const struct fsal_obj_handle *obj_hdl,
fsal_digesttype_t output_type,
struct gsh_buffdesc *fh_desc)
{
const struct vfs_fsal_obj_handle *myself;
myself = container_of(obj_hdl, struct vfs_fsal_obj_handle, obj_handle);
if (obj_hdl->fsal != obj_hdl->fs->fsal) {
/* Log, but allow digest */
LogDebug(COMPONENT_FSAL,
"FSAL %s operation for handle belonging to FSAL %s",
obj_hdl->fsal->name,
obj_hdl->fs->fsal != NULL
? obj_hdl->fs->fsal->name
: "(none)");
}
switch (output_type) {
case FSAL_DIGEST_NFSV3:
case FSAL_DIGEST_NFSV4:
if (fh_desc->len < myself->handle->handle_len) {
LogMajor(COMPONENT_FSAL,
"Space too small for handle. need %d, have %lu",
(int) myself->handle->handle_len,
fh_desc->len);
return fsalstat(ERR_FSAL_TOOSMALL, 0);
}
memcpy(fh_desc->addr,
myself->handle->handle_data,
myself->handle->handle_len);
break;
default:
return fsalstat(ERR_FSAL_SERVERFAULT, 0);
}
fh_desc->len = myself->handle->handle_len;
return fsalstat(ERR_FSAL_NO_ERROR, 0);
}
/**
* handle_to_key
* return a handle descriptor into the handle in this object handle
* @TODO reminder. make sure things like hash keys don't point here
* after the handle is released.
*/
static void handle_to_key(struct fsal_obj_handle *obj_hdl,
struct gsh_buffdesc *fh_desc)
{
struct vfs_fsal_obj_handle *myself;
myself = container_of(obj_hdl, struct vfs_fsal_obj_handle, obj_handle);
fh_desc->addr = myself->handle->handle_data;
fh_desc->len = myself->handle->handle_len;
}
/*
* release
* release our export first so they know we are gone
*/
static void release(struct fsal_obj_handle *obj_hdl)
{
struct vfs_fsal_obj_handle *myself;
object_file_type_t type = obj_hdl->type;
myself = container_of(obj_hdl, struct vfs_fsal_obj_handle, obj_handle);
if (type == REGULAR_FILE) {
fsal_status_t st = vfs_close(obj_hdl);
if (FSAL_IS_ERROR(st)) {
LogCrit(COMPONENT_FSAL,
"Could not close hdl 0x%p, error %s(%d)",
obj_hdl, strerror(st.minor), st.minor);
}
}
fsal_obj_handle_fini(obj_hdl);
if (type == SYMBOLIC_LINK) {
if (myself->u.symlink.link_content != NULL)
gsh_free(myself->u.symlink.link_content);
} else if (vfs_unopenable_type(type)) {
if (myself->u.unopenable.name != NULL)
gsh_free(myself->u.unopenable.name);
if (myself->u.unopenable.dir != NULL)
gsh_free(myself->u.unopenable.dir);
}
gsh_free(myself);
}
void vfs_handle_ops_init(struct fsal_obj_ops *ops)
{
ops->release = release;
ops->lookup = lookup;
ops->readdir = read_dirents;
ops->create = create;
ops->mkdir = makedir;
ops->mknode = makenode;
ops->symlink = makesymlink;
ops->readlink = readsymlink;
ops->test_access = fsal_test_access;
ops->getattrs = getattrs;
ops->setattrs = setattrs;
ops->link = linkfile;
ops->rename = renamefile;
ops->unlink = file_unlink;
ops->open = vfs_open;
ops->status = vfs_status;
ops->read = vfs_read;
ops->write = vfs_write;
ops->commit = vfs_commit;
ops->lock_op = vfs_lock_op;
ops->close = vfs_close;
ops->lru_cleanup = vfs_lru_cleanup;
ops->handle_digest = handle_digest;
ops->handle_to_key = handle_to_key;
/* xattr related functions */
ops->list_ext_attrs = vfs_list_ext_attrs;
ops->getextattr_id_by_name = vfs_getextattr_id_by_name;
ops->getextattr_value_by_name = vfs_getextattr_value_by_name;
ops->getextattr_value_by_id = vfs_getextattr_value_by_id;
ops->setextattr_value = vfs_setextattr_value;
ops->setextattr_value_by_id = vfs_setextattr_value_by_id;
ops->getextattr_attrs = vfs_getextattr_attrs;
ops->remove_extattr_by_id = vfs_remove_extattr_by_id;
ops->remove_extattr_by_name = vfs_remove_extattr_by_name;
}
/* export methods that create object handles
*/
/* lookup_path
* modeled on old api except we don't stuff attributes.
* KISS
*/
fsal_status_t vfs_lookup_path(struct fsal_export *exp_hdl,
const char *path, struct fsal_obj_handle **handle)
{
int dir_fd = -1;
struct stat stat;
struct vfs_fsal_obj_handle *hdl;
fsal_errors_t fsal_error = ERR_FSAL_NO_ERROR;
int retval = 0;
struct fsal_filesystem *fs;
struct fsal_dev__ dev;
vfs_file_handle_t *fh = NULL;
vfs_alloc_handle(fh);
*handle = NULL; /* poison it */
dir_fd = open_dir_by_path_walk(-1, path, &stat);
if (dir_fd < 0) {
LogCrit(COMPONENT_FSAL,
"Could not open directory for path %s",
path);
retval = -dir_fd;
goto errout;
}
dev = posix2fsal_devt(stat.st_dev);
fs = lookup_dev(&dev);
if (fs == NULL) {
LogInfo(COMPONENT_FSAL,
"Could not find file system for path %s",
path);
retval = ENOENT;
goto errout;
}
if (fs->fsal != exp_hdl->fsal) {
LogInfo(COMPONENT_FSAL,
"File system for path %s did not belong to FSAL %s",
path, exp_hdl->fsal->name);
retval = EACCES;
goto errout;
}
LogDebug(COMPONENT_FSAL,
"filesystem %s for path %s",
fs->path, path);
retval = vfs_fd_to_handle(dir_fd, fs, fh);
if (retval < 0) {
retval = errno;
LogCrit(COMPONENT_FSAL,
"Could not get handle for path %s, error %s",
path, strerror(retval));
goto errout;
}
/* allocate an obj_handle and fill it up */
hdl = alloc_handle(-1, fh, fs, &stat, NULL, "", exp_hdl);
if (hdl == NULL) {
retval = ENOMEM;
LogCrit(COMPONENT_FSAL,
"Could not allocate handle for path %s",
path);
goto errout;
}
close(dir_fd);
*handle = &hdl->obj_handle;
return fsalstat(ERR_FSAL_NO_ERROR, 0);
errout:
if (dir_fd >= 0)
close(dir_fd);
fsal_error = posix2fsal_error(retval);
return fsalstat(fsal_error, retval);
}
fsal_status_t vfs_check_handle(struct fsal_export *exp_hdl,
struct gsh_buffdesc *hdl_desc,
struct fsal_filesystem **fs,
vfs_file_handle_t *fh,
bool *dummy)
{
fsal_errors_t fsal_error = ERR_FSAL_NO_ERROR;
int retval = 0;
struct fsal_fsid__ fsid;
enum fsid_type fsid_type;
*fs = NULL;
if (!vfs_valid_handle(hdl_desc))
return fsalstat(ERR_FSAL_BADHANDLE, 0);
memcpy(fh->handle_data, hdl_desc->addr, hdl_desc->len);
fh->handle_len = hdl_desc->len;
*dummy = vfs_is_dummy_handle(fh);
retval = vfs_extract_fsid(fh, &fsid_type, &fsid);
if (retval == 0) {
*fs = lookup_fsid(&fsid, fsid_type);
if (*fs == NULL) {
LogInfo(COMPONENT_FSAL,
"Could not map "
"fsid=0x%016"PRIx64".0x%016"PRIx64
" to filesytem",
fsid.major, fsid.minor);
retval = ESTALE;
fsal_error = posix2fsal_error(retval);
goto errout;
}
if (((*fs)->fsal != exp_hdl->fsal) && !(*dummy)) {
LogInfo(COMPONENT_FSAL,
"fsid=0x%016"PRIx64".0x%016"PRIx64
" in handle not a %s filesystem",
fsid.major, fsid.minor,
exp_hdl->fsal->name);
retval = ESTALE;
fsal_error = posix2fsal_error(retval);
goto errout;
}
LogDebug(COMPONENT_FSAL,
"Found filesystem %s for handle for FSAL %s",
(*fs)->path,
(*fs)->fsal != NULL ? (*fs)->fsal->name : "(none)");
} else {
LogDebug(COMPONENT_FSAL,
"Could not map handle to fsid");
fsal_error = ERR_FSAL_BADHANDLE;
goto errout;
}
errout:
return fsalstat(fsal_error, retval);
}
/**
* 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 ] */
)
{
fsal_status_t status;
/* int flags=(O_RDONLY|O_NOFOLLOW); */
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;
/* flags = (O_RDONLY | O_NOFOLLOW | O_NONBLOCK); */
break;
default:
LogMajor(COMPONENT_FSAL,
"Invalid node type in FSAL_mknode: %d", nodetype);
Return(ERR_FSAL_INVAL, 0, 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 */
/* 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);
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, parentdir_handle, access_mask,
&parent_dir_attrs);
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_mknode);
fsal_set_credentials(p_context);
TakeTokenFSCall();
status = fsal_internal_create(p_context, parentdir_handle,
p_node_name, unix_mode, unix_dev,
p_object_handle, NULL);
ReleaseTokenFSCall();
fsal_restore_ganesha_credentials();
if(FSAL_IS_ERROR(status))
ReturnStatus(status, INDEX_FSAL_mknode);
/* 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);
}
static fsal_status_t makedir(struct fsal_obj_handle *dir_hdl,
const char *name, struct attrlist *attrib,
struct fsal_obj_handle **handle)
{
struct vfs_fsal_obj_handle *myself, *hdl;
int dir_fd;
struct stat stat;
mode_t unix_mode;
fsal_errors_t fsal_error = ERR_FSAL_NO_ERROR;
int retval = 0;
int flags = O_PATH | O_NOACCESS;
vfs_file_handle_t *fh = NULL;
vfs_alloc_handle(fh);
LogDebug(COMPONENT_FSAL, "create %s", name);
*handle = NULL; /* poison it */
if (!dir_hdl->obj_ops.handle_is(dir_hdl, DIRECTORY)) {
LogCrit(COMPONENT_FSAL,
"Parent handle is not a directory. hdl = 0x%p",
dir_hdl);
return fsalstat(ERR_FSAL_NOTDIR, 0);
}
myself = container_of(dir_hdl, struct vfs_fsal_obj_handle, obj_handle);
if (dir_hdl->fsal != dir_hdl->fs->fsal) {
LogDebug(COMPONENT_FSAL,
"FSAL %s operation for handle belonging to FSAL %s, return EXDEV",
dir_hdl->fsal->name,
dir_hdl->fs->fsal != NULL
? dir_hdl->fs->fsal->name
: "(none)");
retval = EXDEV;
goto hdlerr;
}
unix_mode = fsal2unix_mode(attrib->mode)
& ~op_ctx->fsal_export->exp_ops.fs_umask(op_ctx->fsal_export);
dir_fd = vfs_fsal_open(myself, flags, &fsal_error);
if (dir_fd < 0)
return fsalstat(fsal_error, -dir_fd);
retval = vfs_stat_by_handle(dir_fd, myself->handle, &stat, flags);
if (retval < 0) {
retval = errno;
goto direrr;
}
/* Become the user because we are creating an object in this dir.
*/
fsal_set_credentials(op_ctx->creds);
retval = mkdirat(dir_fd, name, unix_mode);
if (retval < 0) {
retval = errno;
fsal_restore_ganesha_credentials();
goto direrr;
}
fsal_restore_ganesha_credentials();
retval = vfs_name_to_handle(dir_fd, dir_hdl->fs, name, fh);
if (retval < 0) {
retval = errno;
goto fileerr;
}
retval = fstatat(dir_fd, name, &stat, AT_SYMLINK_NOFOLLOW);
if (retval < 0) {
retval = errno;
goto fileerr;
}
/* allocate an obj_handle and fill it up */
hdl = alloc_handle(dir_fd, fh, dir_hdl->fs, &stat,
myself->handle, name,
op_ctx->fsal_export);
if (hdl == NULL) {
retval = ENOMEM;
goto fileerr;
}
*handle = &hdl->obj_handle;
close(dir_fd);
return fsalstat(ERR_FSAL_NO_ERROR, 0);
fileerr:
unlinkat(dir_fd, name, 0);
direrr:
close(dir_fd);
hdlerr:
fsal_error = posix2fsal_error(retval);
return fsalstat(fsal_error, retval);
}
fsal_status_t GPFSFSAL_unlink(struct fsal_obj_handle *dir_hdl, /* IN */
const char *p_object_name, /* IN */
const struct req_op_context *p_context, /* IN */
struct attrlist *p_parent_attributes)
{ /* IN/OUT */
fsal_status_t status;
gpfsfsal_xstat_t buffxstat;
int mount_fd;
struct gpfs_fsal_obj_handle *gpfs_hdl;
/* sanity checks. */
if (!dir_hdl || !p_context || !p_object_name)
return fsalstat(ERR_FSAL_FAULT, 0);
gpfs_hdl =
container_of(dir_hdl, struct gpfs_fsal_obj_handle, obj_handle);
mount_fd = gpfs_get_root_fd(dir_hdl->export);
/* build the child path */
/* get file metadata */
status =
fsal_internal_stat_name(mount_fd, gpfs_hdl->handle, p_object_name,
&buffxstat.buffstat);
if (FSAL_IS_ERROR(status))
return status;
/******************************
* DELETE FROM THE FILESYSTEM *
******************************/
fsal_set_credentials(p_context->creds);
status =
fsal_internal_unlink(mount_fd, gpfs_hdl->handle, p_object_name,
&buffxstat.buffstat);
fsal_restore_ganesha_credentials();
if (FSAL_IS_ERROR(status))
return status;
/***********************
* FILL THE ATTRIBUTES *
***********************/
if (p_parent_attributes) {
buffxstat.attr_valid = XATTR_STAT;
status =
gpfsfsal_xstat_2_fsal_attributes(&buffxstat,
p_parent_attributes);
if (FSAL_IS_ERROR(status)) {
FSAL_CLEAR_MASK(p_parent_attributes->mask);
FSAL_SET_MASK(p_parent_attributes->mask,
ATTR_RDATTR_ERR);
}
}
/* OK */
return fsalstat(ERR_FSAL_NO_ERROR, 0);
}
/**
* @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;
}
