fsal_status_t vfs_remove_extattr_by_name(struct fsal_obj_handle *obj_hdl,
const struct req_op_context *opctx,
const char *xattr_name)
{
struct vfs_fsal_obj_handle *obj_handle = NULL;
int fd = -1;
int rc = 0;
fsal_errors_t fe;
obj_handle =
container_of(obj_hdl, struct vfs_fsal_obj_handle, obj_handle);
fd = (obj_hdl->type == DIRECTORY) ?
vfs_fsal_open(obj_handle, O_DIRECTORY, &fe) :
vfs_fsal_open(obj_handle, O_RDWR, &fe);
if (fd < 0)
return fsalstat(fe, -fd);
rc = fremovexattr(fd, xattr_name);
close(fd);
if (rc != 0)
return fsalstat(posix2fsal_error(errno), errno);
return fsalstat(ERR_FSAL_NO_ERROR, 0);
}
fsal_status_t vfs_getextattr_value_by_id(struct fsal_obj_handle *obj_hdl,
const struct req_op_context *opctx,
unsigned int xattr_id,
caddr_t buffer_addr,
size_t buffer_size,
size_t *p_output_size)
{
struct vfs_fsal_obj_handle *obj_handle = NULL;
int fd = -1;
int rc = 0;
obj_handle =
container_of(obj_hdl, struct vfs_fsal_obj_handle, obj_handle);
/* check that this index match the type of entry */
if ((xattr_id < XATTR_COUNT)
&& !do_match_type(xattr_list[xattr_id].flags,
obj_hdl->attributes.type)) {
return fsalstat(ERR_FSAL_INVAL, 0);
} else if (xattr_id >= XATTR_COUNT) {
char attr_name[MAXPATHLEN];
fsal_errors_t fe;
fd = (obj_hdl->type == DIRECTORY) ?
vfs_fsal_open(obj_handle, O_DIRECTORY, &fe) :
vfs_fsal_open(obj_handle, O_RDWR, &fe);
if (fd < 0)
return fsalstat(fe, -fd);
/* get the name for this attr */
rc = xattr_id_to_name(fd, xattr_id, attr_name);
if (rc) {
close(fd);
return fsalstat(rc, errno);
}
rc = fgetxattr(fd, attr_name, buffer_addr, buffer_size);
if (rc < 0) {
close(fd);
return fsalstat(posix2fsal_error(errno), errno);
}
/* the xattr value can be a binary, or a string.
* trying to determine its type...
*/
*p_output_size = rc;
close(fd);
rc = ERR_FSAL_NO_ERROR;
} else { /* built-in attr */
/* get the value */
rc = xattr_list[xattr_id].get_func(obj_hdl, buffer_addr,
buffer_size, p_output_size,
xattr_list[xattr_id].arg);
}
return fsalstat(rc, 0);
}
fsal_status_t vfs_remove_extattr_by_id(struct fsal_obj_handle *obj_hdl,
const struct req_op_context *opctx,
unsigned int xattr_id)
{
int rc;
char name[MAXNAMLEN];
struct vfs_fsal_obj_handle *obj_handle = NULL;
int fd = -1;
fsal_errors_t fe;
obj_handle =
container_of(obj_hdl, struct vfs_fsal_obj_handle, obj_handle);
fd = (obj_hdl->type == DIRECTORY) ?
vfs_fsal_open(obj_handle, O_DIRECTORY, &fe) :
vfs_fsal_open(obj_handle, O_RDWR, &fe);
if (fd < 0)
return fsalstat(fe, -fd);
rc = xattr_id_to_name(fd, xattr_id, name);
if (rc) {
close(fd);
return fsalstat(rc, errno);
}
rc = fremovexattr(fd, name);
close(fd);
if (rc != 0)
return fsalstat(posix2fsal_error(errno), errno);
return fsalstat(ERR_FSAL_NO_ERROR, 0);
}
fsal_status_t vfs_getextattr_value_by_name(struct fsal_obj_handle *obj_hdl,
const struct req_op_context *opctx,
const char *xattr_name,
caddr_t buffer_addr,
size_t buffer_size,
size_t *p_output_size)
{
struct vfs_fsal_obj_handle *obj_handle = NULL;
int fd = -1;
int rc = 0;
unsigned int index;
fsal_errors_t fe;
obj_handle =
container_of(obj_hdl, struct vfs_fsal_obj_handle, obj_handle);
/* sanity checks */
if (!obj_hdl || !p_output_size || !buffer_addr || !xattr_name)
return fsalstat(ERR_FSAL_FAULT, 0);
/* look for this name */
for (index = 0; index < XATTR_COUNT; index++) {
if (do_match_type(xattr_list[index].flags,
obj_hdl->attributes.type) &&
!strcmp(xattr_list[index].xattr_name, xattr_name)) {
return vfs_getextattr_value_by_id(obj_hdl, opctx, index,
buffer_addr,
buffer_size,
p_output_size);
}
}
fd = (obj_hdl->type == DIRECTORY) ?
vfs_fsal_open(obj_handle, O_DIRECTORY, &fe) :
vfs_fsal_open(obj_handle, O_RDWR, &fe);
if (fd < 0)
return fsalstat(fe, -fd);
/* is it an xattr? */
rc = fgetxattr(fd, xattr_name, buffer_addr, buffer_size);
if (rc < 0) {
close(fd);
return fsalstat(posix2fsal_error(errno), errno);
}
/* the xattr value can be a binary, or a string.
* trying to determine its type...
*/
*p_output_size = rc;
close(fd);
return fsalstat(ERR_FSAL_NO_ERROR, 0);
}
fsal_status_t vfs_getextattr_id_by_name(struct fsal_obj_handle *obj_hdl,
const struct req_op_context *opctx,
const char *xattr_name,
unsigned int *pxattr_id)
{
unsigned int index;
int rc;
int found = FALSE;
struct vfs_fsal_obj_handle *obj_handle = NULL;
int fd = -1;
obj_handle =
container_of(obj_hdl, struct vfs_fsal_obj_handle, obj_handle);
for (index = 0; index < XATTR_COUNT; index++) {
if (!strcmp(xattr_list[index].xattr_name, xattr_name)) {
found = TRUE;
break;
}
}
/* search in xattrs */
if (!found) {
fsal_errors_t fe;
fd = (obj_hdl->type == DIRECTORY) ?
vfs_fsal_open(obj_handle, O_DIRECTORY, &fe) :
vfs_fsal_open(obj_handle, O_RDWR, &fe);
if (fd < 0)
return fsalstat(fe, -fd);
errno = 0;
rc = xattr_name_to_id(fd, xattr_name);
if (rc < 0) {
close(fd);
return fsalstat(-rc, errno);
} else {
index = rc;
}
close(fd);
}
/* If we're here, we got it (early return on error) */
*pxattr_id = index;
return fsalstat(ERR_FSAL_NO_ERROR, 0);
}
fsal_status_t vfs_setextattr_value(struct fsal_obj_handle *obj_hdl,
const struct req_op_context *opctx,
const char *xattr_name, caddr_t buffer_addr,
size_t buffer_size, int create)
{
struct vfs_fsal_obj_handle *obj_handle = NULL;
int fd = -1;
fsal_errors_t fe;
int rc = 0;
/* int flags = 0; */
obj_handle =
container_of(obj_hdl, struct vfs_fsal_obj_handle, obj_handle);
/* /!\ ACL HOOK. If name is "system.posix_acl_access",
* flags must remain unset */
/* if (strncmp(xattr_name, "system.posix_acl_access", MAXNAMLEN)) */
/* flags = create ? XATTR_CREATE : XATTR_REPLACE; */
/* else */
/* flags = 0; */
fd = (obj_hdl->type == DIRECTORY) ? vfs_fsal_open(obj_handle,
O_DIRECTORY,
&fe) :
vfs_fsal_open(obj_handle, O_RDWR, &fe);
if (fd < 0)
return fsalstat(fe, -fd);
if (buffer_size == 0)
rc = fsetxattr(fd, xattr_name, "", 1,
create ? XATTR_CREATE : XATTR_REPLACE);
else
rc = fsetxattr(fd, xattr_name, (char *)buffer_addr, buffer_size,
create ? XATTR_CREATE : XATTR_REPLACE);
close(fd);
if (rc != 0)
return fsalstat(posix2fsal_error(errno), errno);
else
return fsalstat(ERR_FSAL_NO_ERROR, 0);
}
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;
}
fsal_status_t vfs_setextattr_value_by_id(struct fsal_obj_handle *obj_hdl,
const struct req_op_context *opctx,
unsigned int xattr_id,
caddr_t buffer_addr,
size_t buffer_size)
{
char name[MAXNAMLEN];
struct vfs_fsal_obj_handle *obj_handle = NULL;
int fd = -1;
fsal_errors_t fe;
int rc = 0;
obj_handle =
container_of(obj_hdl, struct vfs_fsal_obj_handle, obj_handle);
if (attr_is_read_only(xattr_id))
return fsalstat(ERR_FSAL_PERM, 0);
else if (xattr_id < XATTR_COUNT)
return fsalstat(ERR_FSAL_PERM, 0);
/* build fid path in lustre */
fd = (obj_hdl->type == DIRECTORY) ? vfs_fsal_open(obj_handle,
O_DIRECTORY,
&fe) :
vfs_fsal_open(obj_handle, O_RDWR, &fe);
if (fd < 0)
return fsalstat(fe, -fd);
rc = xattr_id_to_name(fd, xattr_id, name);
close(fd);
if (rc)
return fsalstat(rc, errno);
return vfs_setextattr_value(obj_hdl, opctx, name, buffer_addr,
buffer_size, FALSE);
}
fsal_status_t vfs_open_my_fd(struct vfs_fsal_obj_handle *myself,
fsal_openflags_t openflags,
int posix_flags,
struct vfs_fd *my_fd)
{
int fd;
fsal_errors_t fsal_error = ERR_FSAL_NO_ERROR;
int retval = 0;
LogFullDebug(COMPONENT_FSAL,
"my_fd->fd = %d openflags = %x, posix_flags = %x",
my_fd->fd, openflags, posix_flags);
assert(my_fd->fd == -1
&& my_fd->openflags == FSAL_O_CLOSED && openflags != 0);
LogFullDebug(COMPONENT_FSAL,
"openflags = %x, posix_flags = %x",
openflags, posix_flags);
fd = vfs_fsal_open(myself, posix_flags, &fsal_error);
if (fd < 0) {
retval = -fd;
} else {
/* Save the file descriptor, make sure we only save the
* open modes that actually represent the open file.
*/
LogFullDebug(COMPONENT_FSAL,
"fd = %d, new openflags = %x",
fd, openflags);
if (fd == 0)
LogCrit(COMPONENT_FSAL,
"fd = %d, new openflags = %x",
fd, openflags);
my_fd->fd = fd;
my_fd->openflags = openflags;
}
return fsalstat(fsal_error, retval);
}
fsal_status_t vfs_open(struct fsal_obj_handle *obj_hdl,
fsal_openflags_t openflags)
{
struct vfs_fsal_obj_handle *myself;
int fd;
fsal_errors_t fsal_error = ERR_FSAL_NO_ERROR;
int posix_flags = 0;
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 write lock on object to protect file descriptor. */
PTHREAD_RWLOCK_wrlock(&obj_hdl->lock);
assert(myself->u.file.fd == -1
&& myself->u.file.openflags == FSAL_O_CLOSED && openflags != 0);
fsal2posix_openflags(openflags, &posix_flags);
LogFullDebug(COMPONENT_FSAL, "open_by_handle_at flags from %x to %x",
openflags, posix_flags);
fd = vfs_fsal_open(myself, posix_flags, &fsal_error);
if (fd < 0) {
retval = -fd;
} else {
myself->u.file.fd = fd;
myself->u.file.openflags = openflags;
}
PTHREAD_RWLOCK_unlock(&obj_hdl->lock);
return fsalstat(fsal_error, retval);
}
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 read_dirents(struct fsal_obj_handle *dir_hdl,
fsal_cookie_t *whence, void *dir_state,
fsal_readdir_cb cb, bool *eof)
{
struct vfs_fsal_obj_handle *myself;
int dirfd;
fsal_errors_t fsal_error = ERR_FSAL_NO_ERROR;
int retval = 0;
off_t seekloc = 0;
off_t baseloc = 0;
unsigned int bpos;
int nread;
struct vfs_dirent dentry, *dentryp = &dentry;
char buf[BUF_SIZE];
if (whence != NULL)
seekloc = (off_t) *whence;
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;
}
dirfd = vfs_fsal_open(myself, O_RDONLY | O_DIRECTORY, &fsal_error);
if (dirfd < 0) {
retval = -dirfd;
goto out;
}
seekloc = lseek(dirfd, seekloc, SEEK_SET);
if (seekloc < 0) {
retval = errno;
fsal_error = posix2fsal_error(retval);
goto done;
}
do {
baseloc = seekloc;
nread = vfs_readents(dirfd, buf, BUF_SIZE, &seekloc);
if (nread < 0) {
retval = errno;
fsal_error = posix2fsal_error(retval);
goto done;
}
if (nread == 0)
break;
for (bpos = 0; bpos < nread;) {
if (!to_vfs_dirent(buf, bpos, dentryp, baseloc)
|| strcmp(dentryp->vd_name, ".") == 0
|| strcmp(dentryp->vd_name, "..") == 0)
goto skip; /* must skip '.' and '..' */
/* callback to cache inode */
if (!cb(dentryp->vd_name, dir_state,
(fsal_cookie_t) dentryp->vd_offset)) {
goto done;
}
skip:
bpos += dentryp->vd_reclen;
}
} while (nread > 0);
*eof = true;
done:
close(dirfd);
out:
return fsalstat(fsal_error, retval);
}
static fsal_status_t linkfile(struct fsal_obj_handle *obj_hdl,
struct fsal_obj_handle *destdir_hdl,
const char *name)
{
struct vfs_fsal_obj_handle *myself, *destdir;
int srcfd, destdirfd;
int retval = 0;
int flags = O_PATH | O_NOACCESS | O_NOFOLLOW;
fsal_errors_t fsal_error = ERR_FSAL_NO_ERROR;
LogFullDebug(COMPONENT_FSAL, "link to %s", name);
if (!op_ctx->fsal_export->exp_ops.
fs_supports(op_ctx->fsal_export, fso_link_support)) {
fsal_error = ERR_FSAL_NOTSUPP;
goto out;
}
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 out;
}
if (obj_hdl->type == REGULAR_FILE && myself->u.file.fd >= 0) {
srcfd = myself->u.file.fd;
} else {
srcfd = vfs_fsal_open(myself, flags, &fsal_error);
if (srcfd < 0) {
retval = -srcfd;
fsal_error = posix2fsal_error(retval);
LogDebug(COMPONENT_FSAL,
"open myself returned %d", retval);
goto out;
}
}
destdir =
container_of(destdir_hdl, struct vfs_fsal_obj_handle, obj_handle);
if (destdir_hdl->fsal != destdir_hdl->fs->fsal) {
LogDebug(COMPONENT_FSAL,
"FSAL %s operation for handle belonging to FSAL %s, return EXDEV",
destdir_hdl->fsal->name,
destdir_hdl->fs->fsal != NULL
? destdir_hdl->fs->fsal->name
: "(none)");
retval = EXDEV;
fsal_error = posix2fsal_error(retval);
goto fileerr;
}
destdirfd = vfs_fsal_open(destdir, flags, &fsal_error);
if (destdirfd < 0) {
retval = destdirfd;
fsal_error = posix2fsal_error(retval);
LogDebug(COMPONENT_FSAL,
"open destdir returned %d", retval);
goto fileerr;
}
retval = vfs_link_by_handle(myself->handle, srcfd, destdirfd, name);
if (retval < 0) {
retval = errno;
LogFullDebug(COMPONENT_FSAL,
"link returned %d", retval);
fsal_error = posix2fsal_error(retval);
}
close(destdirfd);
fileerr:
if (!(obj_hdl->type == REGULAR_FILE && myself->u.file.fd >= 0))
close(srcfd);
out:
LogFullDebug(COMPONENT_FSAL, "returning %d, %d", fsal_error, retval);
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);
}
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);
}
static fsal_status_t lookup(struct fsal_obj_handle *parent,
const char *path, struct fsal_obj_handle **handle)
{
struct vfs_fsal_obj_handle *parent_hdl, *hdl;
fsal_errors_t fsal_error = ERR_FSAL_NO_ERROR;
int retval, dirfd;
struct stat stat;
vfs_file_handle_t *fh = NULL;
vfs_alloc_handle(fh);
fsal_dev_t dev;
struct fsal_filesystem *fs;
bool xfsal = false;
*handle = NULL; /* poison it first */
parent_hdl =
container_of(parent, struct vfs_fsal_obj_handle, obj_handle);
if (!parent->obj_ops.handle_is(parent, DIRECTORY)) {
LogCrit(COMPONENT_FSAL,
"Parent handle is not a directory. hdl = 0x%p", parent);
return fsalstat(ERR_FSAL_NOTDIR, 0);
}
if (parent->fsal != parent->fs->fsal) {
LogDebug(COMPONENT_FSAL,
"FSAL %s operation for handle belonging to FSAL %s, return EXDEV",
parent->fsal->name,
parent->fs->fsal != NULL
? parent->fs->fsal->name
: "(none)");
retval = EXDEV;
goto hdlerr;
}
fs = parent->fs;
dirfd = vfs_fsal_open(parent_hdl, O_PATH | O_NOACCESS, &fsal_error);
if (dirfd < 0)
return fsalstat(fsal_error, -dirfd);
retval = fstatat(dirfd, path, &stat, AT_SYMLINK_NOFOLLOW);
if (retval < 0) {
retval = errno;
goto direrr;
}
dev = posix2fsal_devt(stat.st_dev);
if ((dev.minor != parent_hdl->dev.minor) ||
(dev.major != parent_hdl->dev.major)) {
/* XDEV */
fs = lookup_dev(&dev);
if (fs == NULL) {
LogDebug(COMPONENT_FSAL,
"Lookup of %s crosses filesystem boundary to "
"unknown file system dev=%"PRIu64".%"PRIu64,
path, dev.major, dev.minor);
retval = EXDEV;
goto direrr;
}
if (fs->fsal != parent->fsal) {
xfsal = true;
LogDebug(COMPONENT_FSAL,
"Lookup of %s crosses filesystem boundary to file system %s into FSAL %s",
path, fs->path,
fs->fsal != NULL
? fs->fsal->name
: "(none)");
} else {
LogDebug(COMPONENT_FSAL,
"Lookup of %s crosses filesystem boundary to file system %s",
path, fs->path);
}
}
if (xfsal || vfs_name_to_handle(dirfd, fs, path, fh) < 0) {
retval = errno;
if (((retval == ENOTTY) ||
(retval == EOPNOTSUPP) ||
(retval == ENOTSUP) ||
xfsal) &&
(fs != parent->fs)) {
/* Crossed device into territory not handled by
* this FSAL (XFS or VFS). Need to invent a handle.
* The made up handle will be JUST the fsid, we
* do not expect to see the handle on the wire, and
* this handle will not be valid for any form of this
* FSAL.
*/
LogDebug(COMPONENT_FSAL,
"vfs_name_to_handle %s, inventing FSAL %s handle for FSAL %s filesystem %s",
xfsal ? "skipped" : "failed",
parent->fsal->name,
fs->fsal != NULL
? fs->fsal->name
: "(none)",
path);
retval = vfs_encode_dummy_handle(fh, fs);
if (retval < 0) {
retval = errno;
goto direrr;
}
retval = 0;
} else {
/* Some other error */
goto direrr;
}
}
/* allocate an obj_handle and fill it up */
hdl = alloc_handle(dirfd, fh, fs, &stat, parent_hdl->handle, path,
op_ctx->fsal_export);
close(dirfd);
if (hdl == NULL) {
retval = ENOMEM;
goto hdlerr;
}
*handle = &hdl->obj_handle;
return fsalstat(ERR_FSAL_NO_ERROR, 0);
direrr:
close(dirfd);
hdlerr:
fsal_error = posix2fsal_error(retval);
return fsalstat(fsal_error, retval);
}
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 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_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 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_status_t find_fd(int *fd,
struct fsal_obj_handle *obj_hdl,
bool bypass,
struct state_t *state,
fsal_openflags_t openflags,
bool *has_lock,
bool *need_fsync,
bool *closefd,
bool open_for_locks)
{
struct vfs_fsal_obj_handle *myself;
struct vfs_filesystem *vfs_fs;
struct vfs_fd temp_fd = {0, -1}, *out_fd = &temp_fd;
fsal_status_t status = {ERR_FSAL_NO_ERROR, 0};
int rc, posix_flags;
myself = container_of(obj_hdl, struct vfs_fsal_obj_handle, obj_handle);
vfs_fs = myself->obj_handle.fs->private_data;
fsal2posix_openflags(openflags, &posix_flags);
/* Handle nom-regular files */
switch (obj_hdl->type) {
case SOCKET_FILE:
case CHARACTER_FILE:
case BLOCK_FILE:
rc = vfs_open_by_handle(vfs_fs,
myself->u.unopenable.dir,
O_PATH | O_NOACCESS,
&status.major);
if (rc < 0) {
LogDebug(COMPONENT_FSAL,
"Failed with %s openflags 0x%08x",
strerror(-rc), O_PATH | O_NOACCESS);
return fsalstat(posix2fsal_error(-rc), -rc);
}
*fd = rc;
*closefd = true;
return status;
case REGULAR_FILE:
status = fsal_find_fd((struct fsal_fd **)&out_fd, obj_hdl,
(struct fsal_fd *)&myself->u.file.fd,
&myself->u.file.share,
bypass, state, openflags,
vfs_open_func, vfs_close_func,
has_lock, need_fsync,
closefd, open_for_locks);
*fd = out_fd->fd;
return status;
case SYMBOLIC_LINK:
posix_flags |= (O_PATH | O_RDWR | O_NOFOLLOW);
break;
case FIFO_FILE:
posix_flags |= O_NONBLOCK;
break;
case DIRECTORY:
break;
case NO_FILE_TYPE:
case EXTENDED_ATTR:
return fsalstat(posix2fsal_error(EINVAL), EINVAL);
}
/* Open file descriptor for non-regular files. */
rc = vfs_fsal_open(myself, posix_flags, &status.major);
if (rc < 0) {
LogDebug(COMPONENT_FSAL,
"Failed with %s openflags 0x%08x",
strerror(-rc), openflags);
return fsalstat(posix2fsal_error(-rc), -rc);
}
LogFullDebug(COMPONENT_FSAL,
"Opened fd=%d for file of type %s",
rc, object_file_type_to_str(obj_hdl->type));
*fd = rc;
*closefd = true;
return status;
}
fsal_status_t vfs_list_ext_attrs(struct fsal_obj_handle *obj_hdl,
const struct req_op_context *opctx,
unsigned int argcookie,
fsal_xattrent_t *xattrs_tab,
unsigned int xattrs_tabsize,
unsigned int *p_nb_returned, int *end_of_list)
{
unsigned int index;
unsigned int out_index;
unsigned int cookie = argcookie;
struct vfs_fsal_obj_handle *obj_handle = NULL;
int fd = -1;
fsal_errors_t fe;
char names[MAXPATHLEN], *ptr;
ssize_t namesize;
int xattr_idx;
obj_handle =
container_of(obj_hdl, struct vfs_fsal_obj_handle, obj_handle);
/* Deal with special cookie */
if (cookie == XATTR_RW_COOKIE)
cookie = XATTR_COUNT;
for (index = cookie, out_index = 0;
index < XATTR_COUNT && out_index < xattrs_tabsize; index++) {
if (do_match_type
(xattr_list[index].flags, obj_hdl->attributes.type)) {
/* fills an xattr entry */
xattrs_tab[out_index].xattr_id = index;
strncpy(xattr_list[index].xattr_name,
xattrs_tab[out_index].xattr_name, MAXNAMLEN);
xattrs_tab[out_index].xattr_cookie = index + 1;
/* set asked attributes (all supported) */
xattrs_tab[out_index].attributes.mask =
obj_hdl->attributes.mask;
if (file_attributes_to_xattr_attrs
(&obj_hdl->attributes,
&xattrs_tab[out_index].attributes, index)) {
/* set error flag */
xattrs_tab[out_index].attributes.mask =
ATTR_RDATTR_ERR;
}
/* next output slot */
out_index++;
}
}
/* save a call if output array is full */
if (out_index == xattrs_tabsize) {
*end_of_list = FALSE;
*p_nb_returned = out_index;
return fsalstat(ERR_FSAL_NO_ERROR, 0);
}
/* get the path of the file in Lustre */
fd = (obj_hdl->type == DIRECTORY) ?
vfs_fsal_open(obj_handle, O_DIRECTORY, &fe) :
vfs_fsal_open(obj_handle, O_RDWR, &fe);
if (fd < 0)
return fsalstat(fe, -fd);
/* get xattrs */
namesize = flistxattr(fd, names, sizeof(names));
if (namesize >= 0) {
size_t len = 0;
errno = 0;
for (ptr = names, xattr_idx = 0;
(ptr < names + namesize) && (out_index < xattrs_tabsize);
xattr_idx++, ptr += len + 1) {
len = strlen(ptr);
index = XATTR_COUNT + xattr_idx;
/* skip if index is before cookie */
if (index < cookie)
continue;
/* fills an xattr entry */
xattrs_tab[out_index].xattr_id = index;
strncpy(xattrs_tab[out_index].xattr_name, ptr, len + 1);
xattrs_tab[out_index].xattr_cookie = index + 1;
/* set asked attributes (all supported) */
xattrs_tab[out_index].attributes.mask =
obj_hdl->attributes.mask;
if (file_attributes_to_xattr_attrs
(&obj_hdl->attributes,
&xattrs_tab[out_index].attributes, index)) {
/* set error flag */
xattrs_tab[out_index].attributes.mask =
ATTR_RDATTR_ERR;
}
/* next output slot */
out_index++;
}
/* all xattrs are in the output array */
if (ptr >= names + namesize)
*end_of_list = TRUE;
else
*end_of_list = FALSE;
} else /* no xattrs */
*end_of_list = TRUE;
*p_nb_returned = out_index;
close(fd);
return fsalstat(ERR_FSAL_NO_ERROR, 0);
}