int vfs_readlink(struct vfs_fsal_obj_handle *myself,
fsal_errors_t *fsal_error)
{
int retval = 0;
int fd;
ssize_t retlink;
struct stat st;
int flags = O_PATH | O_NOACCESS | O_NOFOLLOW;
if (myself->u.symlink.link_content != NULL) {
gsh_free(myself->u.symlink.link_content);
myself->u.symlink.link_content = NULL;
myself->u.symlink.link_size = 0;
}
fd = vfs_fsal_open(myself, flags, fsal_error);
if (fd < 0)
return fd;
retval = vfs_stat_by_handle(fd, myself->handle, &st, flags);
if (retval < 0)
goto error;
myself->u.symlink.link_size = st.st_size + 1;
myself->u.symlink.link_content =
gsh_malloc(myself->u.symlink.link_size);
if (myself->u.symlink.link_content == NULL)
goto error;
retlink =
vfs_readlink_by_handle(myself->handle, fd, "",
myself->u.symlink.link_content,
myself->u.symlink.link_size);
if (retlink < 0)
goto error;
myself->u.symlink.link_content[retlink] = '\0';
close(fd);
return retval;
error:
retval = -errno;
*fsal_error = posix2fsal_error(errno);
close(fd);
if (myself->u.symlink.link_content != NULL) {
gsh_free(myself->u.symlink.link_content);
myself->u.symlink.link_content = NULL;
myself->u.symlink.link_size = 0;
}
return retval;
}
/**
* VFSFSAL_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 VFSFSAL_getattrs(fsal_handle_t * p_filehandle, /* IN */
fsal_op_context_t * p_context, /* IN */
fsal_attrib_list_t * p_object_attributes /* IN/OUT */
)
{
fsal_status_t st;
int rc = 0 ;
int errsv;
struct stat buffstat;
/* sanity checks.
* note : object_attributes is mandatory in VFSFSAL_getattrs.
*/
if(!p_filehandle || !p_context || !p_object_attributes)
Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_getattrs);
TakeTokenFSCall();
rc = vfs_stat_by_handle( ((vfsfsal_op_context_t *)p_context)->export_context->mount_root_fd,
&((vfsfsal_handle_t *)p_filehandle)->data.vfs_handle,
&buffstat ) ;
errsv = errno;
ReleaseTokenFSCall();
if( rc == -1 )
Return(posix2fsal_error(errsv), errsv, INDEX_FSAL_getattrs);
/* convert attributes */
st = posix2fsal_attributes(&buffstat, p_object_attributes);
if(FSAL_IS_ERROR(st))
{
FSAL_CLEAR_MASK(p_object_attributes->asked_attributes);
FSAL_SET_MASK(p_object_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
ReturnStatus(st, INDEX_FSAL_getattrs);
}
Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_getattrs);
}
fsal_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);
}
fsal_status_t fetch_attrs(struct vfs_fsal_obj_handle *myself,
int my_fd, struct attrlist *attrs)
{
struct stat stat;
int retval = 0;
fsal_status_t status = {0, 0};
const char *func = "unknown";
/* Now stat the file as appropriate */
switch (myself->obj_handle.type) {
case SOCKET_FILE:
case CHARACTER_FILE:
case BLOCK_FILE:
retval = fstatat(my_fd, myself->u.unopenable.name, &stat,
AT_SYMLINK_NOFOLLOW);
func = "fstatat";
break;
case REGULAR_FILE:
retval = fstat(my_fd, &stat);
func = "fstat";
break;
case SYMBOLIC_LINK:
case FIFO_FILE:
case DIRECTORY:
retval = vfs_stat_by_handle(my_fd, &stat);
func = "vfs_stat_by_handle";
break;
case NO_FILE_TYPE:
case EXTENDED_ATTR:
/* Caught during open with EINVAL */
break;
}
if (retval < 0) {
if (errno == ENOENT)
retval = ESTALE;
else
retval = errno;
LogDebug(COMPONENT_FSAL, "%s failed with %s", func,
strerror(retval));
if (attrs->mask & ATTR_RDATTR_ERR) {
/* Caller asked for error to be visible. */
attrs->mask = ATTR_RDATTR_ERR;
}
return fsalstat(posix2fsal_error(retval), retval);
}
posix2fsal_attributes(&stat, attrs);
attrs->fsid = myself->obj_handle.fs->fsid;
if (myself->sub_ops && myself->sub_ops->getattrs) {
status =
myself->sub_ops->getattrs(myself, my_fd, attrs->mask, attrs);
if (FSAL_IS_ERROR(status) &&
(attrs->mask & ATTR_RDATTR_ERR) != 0) {
/* Caller asked for error to be visible. */
attrs->mask = ATTR_RDATTR_ERR;
}
}
if (!FSAL_IS_ERROR(status)) {
/* Make sure ATTR_RDATTR_ERR is cleared on success. */
attrs->mask &= ~ATTR_RDATTR_ERR;
}
return status;
}
int vfs_readlink(struct vfs_fsal_obj_handle *myself,
fsal_errors_t *fsal_error)
{
int retval = 0;
int fd = -1;
ssize_t retlink;
struct stat st;
#ifndef __FreeBSD__
int flags = O_PATH | O_NOACCESS | O_NOFOLLOW;
#endif
if (myself->u.symlink.link_content != NULL) {
gsh_free(myself->u.symlink.link_content);
myself->u.symlink.link_content = NULL;
myself->u.symlink.link_size = 0;
}
#ifndef __FreeBSD__
fd = vfs_fsal_open(myself, flags, fsal_error);
if (fd < 0)
return fd;
retval = vfs_stat_by_handle(fd, &st);
if (retval < 0)
goto error;
#else
struct fhandle *handle = v_to_fhandle(myself->handle->handle_data);
retval = fhstat(handle, &st);
if (retval < 0)
goto error;
#endif
myself->u.symlink.link_size = st.st_size + 1;
myself->u.symlink.link_content =
gsh_malloc(myself->u.symlink.link_size);
retlink =
vfs_readlink_by_handle(myself->handle, fd, "",
myself->u.symlink.link_content,
myself->u.symlink.link_size);
if (retlink < 0)
goto error;
myself->u.symlink.link_content[retlink] = '\0';
#ifndef __FreeBSD__
close(fd);
#endif
return retval;
error:
retval = -errno;
*fsal_error = posix2fsal_error(errno);
#ifndef __FreeBSD__
close(fd);
#endif
if (myself->u.symlink.link_content != NULL) {
gsh_free(myself->u.symlink.link_content);
myself->u.symlink.link_content = NULL;
myself->u.symlink.link_size = 0;
}
return 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);
}
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);
}
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 vfs_create_handle(struct fsal_export *exp_hdl,
struct gsh_buffdesc *hdl_desc,
struct fsal_obj_handle **handle)
{
fsal_status_t status;
struct vfs_fsal_obj_handle *hdl;
struct stat obj_stat;
vfs_file_handle_t *fh = NULL;
fsal_errors_t fsal_error = ERR_FSAL_NO_ERROR;
int retval = 0;
int fd;
int flags = O_PATH | O_NOACCESS | O_NOFOLLOW;
struct fsal_filesystem *fs;
bool dummy;
vfs_alloc_handle(fh);
*handle = NULL; /* poison it first */
status = vfs_check_handle(exp_hdl, hdl_desc, &fs, fh, &dummy);
if (FSAL_IS_ERROR(status))
return status;
if (dummy) {
/* We don't need fd here, just stat the fs->path */
fd = -1;
retval = stat(fs->path, &obj_stat);
} else {
fd = vfs_open_by_handle(fs->private, fh, flags, &fsal_error);
if (fd < 0) {
retval = -fd;
goto errout;
}
retval = vfs_stat_by_handle(fd, fh, &obj_stat, flags);
}
/* Test the result of stat */
if (retval != 0) {
retval = errno;
LogDebug(COMPONENT_FSAL,
"%s failed with %s",
dummy ? "stat" : "vfs_stat_by_handle",
strerror(retval));
fsal_error = posix2fsal_error(retval);
if (fd >= 0)
close(fd);
goto errout;
}
hdl = alloc_handle(fd, fh, fs, &obj_stat, NULL, "", exp_hdl);
if (fd >= 0)
close(fd);
if (hdl == NULL) {
LogDebug(COMPONENT_FSAL,
"Could not allocate handle");
fsal_error = ERR_FSAL_NOMEM;
goto errout;
}
*handle = &hdl->obj_handle;
errout:
return fsalstat(fsal_error, 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);
}
