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-rw-r--r--src/rbd_fuse/rbd-fuse.cc961
1 files changed, 961 insertions, 0 deletions
diff --git a/src/rbd_fuse/rbd-fuse.cc b/src/rbd_fuse/rbd-fuse.cc
new file mode 100644
index 00000000..e7c81665
--- /dev/null
+++ b/src/rbd_fuse/rbd-fuse.cc
@@ -0,0 +1,961 @@
+/*
+ * rbd-fuse
+ */
+#define FUSE_USE_VERSION 30
+
+#include "include/int_types.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <fuse.h>
+#include <pthread.h>
+#include <string.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <assert.h>
+#include <string>
+#include <mutex>
+#include <limits.h>
+
+#if defined(__FreeBSD__)
+#include <sys/param.h>
+#endif
+
+#include "include/compat.h"
+#include "include/rbd/librbd.h"
+#include "include/ceph_assert.h"
+
+#include "common/ceph_argparse.h"
+#include "common/ceph_context.h"
+#include "include/ceph_fuse.h"
+
+#include "global/global_init.h"
+#include "global/global_context.h"
+
+static int gotrados = 0;
+char *pool_name;
+char *nspace_name;
+char *mount_image_name;
+rados_t cluster;
+rados_ioctx_t ioctx;
+
+std::mutex readdir_lock;
+
+struct rbd_stat {
+ u_char valid;
+ rbd_image_info_t rbd_info;
+};
+
+struct rbd_options {
+ char *pool_name;
+ char *nspace_name;
+ char *image_name;
+};
+
+struct rbd_image {
+ char *image_name;
+ struct rbd_image *next;
+};
+struct rbd_image_data {
+ struct rbd_image *images;
+ rbd_image_spec_t *image_specs;
+ size_t image_spec_count;
+};
+struct rbd_image_data rbd_image_data;
+
+struct rbd_openimage {
+ char *image_name;
+ rbd_image_t image;
+ struct rbd_stat rbd_stat;
+};
+#define MAX_RBD_IMAGES 128
+struct rbd_openimage opentbl[MAX_RBD_IMAGES];
+
+struct rbd_options rbd_options = {(char*) "rbd", (char*) "", NULL};
+
+#define rbdsize(fd) opentbl[fd].rbd_stat.rbd_info.size
+#define rbdblksize(fd) opentbl[fd].rbd_stat.rbd_info.obj_size
+#define rbdblkcnt(fd) opentbl[fd].rbd_stat.rbd_info.num_objs
+
+uint64_t imagesize = 1024ULL * 1024 * 1024;
+uint64_t imageorder = 22ULL;
+uint64_t imagefeatures = 1ULL;
+
+// Minimize calls to rbd_list: marks bracketing of opendir/<ops>/releasedir
+int in_opendir;
+
+/* prototypes */
+int connect_to_cluster(rados_t *pcluster);
+void enumerate_images(struct rbd_image_data *data);
+int open_rbd_image(const char *image_name);
+int find_openrbd(const char *path);
+
+void simple_err(const char *msg, int err);
+
+void
+enumerate_images(struct rbd_image_data *data)
+{
+ struct rbd_image **head = &data->images;
+ struct rbd_image *im, *next;
+ int ret;
+
+ if (*head != NULL) {
+ for (im = *head; im != NULL;) {
+ next = im->next;
+ free(im);
+ im = next;
+ }
+ *head = NULL;
+ rbd_image_spec_list_cleanup(data->image_specs,
+ data->image_spec_count);
+ free(data->image_specs);
+ data->image_specs = NULL;
+ data->image_spec_count = 0;
+ }
+
+ while (true) {
+ ret = rbd_list2(ioctx, data->image_specs,
+ &data->image_spec_count);
+ if (ret == -ERANGE) {
+ data->image_specs = static_cast<rbd_image_spec_t *>(
+ realloc(data->image_specs,
+ sizeof(rbd_image_spec_t) * data->image_spec_count));
+ } else if (ret < 0) {
+ simple_err("Failed to list images", ret);
+ } else {
+ break;
+ }
+ }
+
+ if (*nspace_name != '\0') {
+ fprintf(stderr, "pool/namespace %s/%s: ", pool_name, nspace_name);
+ } else {
+ fprintf(stderr, "pool %s: ", pool_name);
+ }
+ for (size_t idx = 0; idx < data->image_spec_count; ++idx) {
+ if ((mount_image_name == NULL) ||
+ ((strlen(mount_image_name) > 0) &&
+ (strcmp(data->image_specs[idx].name, mount_image_name) == 0))) {
+ fprintf(stderr, "%s, ", data->image_specs[idx].name);
+ im = static_cast<rbd_image*>(malloc(sizeof(*im)));
+ im->image_name = data->image_specs[idx].name;
+ im->next = *head;
+ *head = im;
+ }
+ }
+ fprintf(stderr, "\n");
+}
+
+int
+find_openrbd(const char *path)
+{
+ int i;
+
+ /* find in opentbl[] entry if already open */
+ for (i = 0; i < MAX_RBD_IMAGES; i++) {
+ if ((opentbl[i].image_name != NULL) &&
+ (strcmp(opentbl[i].image_name, path) == 0)) {
+ return i;
+ }
+ }
+ return -1;
+}
+
+int
+open_rbd_image(const char *image_name)
+{
+ struct rbd_image *im;
+ struct rbd_openimage *rbd = NULL;
+ int fd;
+
+ if (image_name == (char *)NULL)
+ return -1;
+
+ // relies on caller to keep rbd_image_data up to date
+ for (im = rbd_image_data.images; im != NULL; im = im->next) {
+ if (strcmp(im->image_name, image_name) == 0) {
+ break;
+ }
+ }
+ if (im == NULL)
+ return -1;
+
+ /* find in opentbl[] entry if already open */
+ if ((fd = find_openrbd(image_name)) != -1) {
+ rbd = &opentbl[fd];
+ } else {
+ int i;
+ // allocate an opentbl[] and open the image
+ for (i = 0; i < MAX_RBD_IMAGES; i++) {
+ if (opentbl[i].image == NULL) {
+ fd = i;
+ rbd = &opentbl[fd];
+ rbd->image_name = strdup(image_name);
+ break;
+ }
+ }
+ if (i == MAX_RBD_IMAGES || !rbd)
+ return -1;
+ int ret = rbd_open(ioctx, rbd->image_name, &(rbd->image), NULL);
+ if (ret < 0) {
+ simple_err("open_rbd_image: can't open: ", ret);
+ return ret;
+ }
+ }
+ rbd_stat(rbd->image, &(rbd->rbd_stat.rbd_info),
+ sizeof(rbd_image_info_t));
+ rbd->rbd_stat.valid = 1;
+ return fd;
+}
+
+static void
+iter_images(void *cookie,
+ void (*iter)(void *cookie, const char *image))
+{
+ struct rbd_image *im;
+
+ readdir_lock.lock();
+
+ for (im = rbd_image_data.images; im != NULL; im = im->next)
+ iter(cookie, im->image_name);
+ readdir_lock.unlock();
+}
+
+static void count_images_cb(void *cookie, const char *image)
+{
+ (*((unsigned int *)cookie))++;
+}
+
+static int count_images(void)
+{
+ unsigned int count = 0;
+
+ readdir_lock.lock();
+ enumerate_images(&rbd_image_data);
+ readdir_lock.unlock();
+
+ iter_images(&count, count_images_cb);
+ return count;
+}
+
+extern "C" {
+
+static int rbdfs_getattr(const char *path, struct stat *stbuf
+#if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 0)
+ , struct fuse_file_info *fi
+#endif
+ )
+{
+ int fd;
+ time_t now;
+
+ if (!gotrados)
+ return -ENXIO;
+
+ if (path[0] == 0)
+ return -ENOENT;
+
+ memset(stbuf, 0, sizeof(struct stat));
+
+ if (strcmp(path, "/") == 0) {
+
+ now = time(NULL);
+ stbuf->st_mode = S_IFDIR + 0755;
+ stbuf->st_nlink = 2+count_images();
+ stbuf->st_uid = getuid();
+ stbuf->st_gid = getgid();
+ stbuf->st_size = 1024;
+ stbuf->st_blksize = 1024;
+ stbuf->st_blocks = 1;
+ stbuf->st_atime = now;
+ stbuf->st_mtime = now;
+ stbuf->st_ctime = now;
+
+ return 0;
+ }
+
+ if (!in_opendir) {
+ readdir_lock.lock();
+ enumerate_images(&rbd_image_data);
+ readdir_lock.unlock();
+ }
+ fd = open_rbd_image(path + 1);
+ if (fd < 0)
+ return -ENOENT;
+
+ now = time(NULL);
+ stbuf->st_mode = S_IFREG | 0666;
+ stbuf->st_nlink = 1;
+ stbuf->st_uid = getuid();
+ stbuf->st_gid = getgid();
+ stbuf->st_size = rbdsize(fd);
+ stbuf->st_blksize = rbdblksize(fd);
+ stbuf->st_blocks = rbdblkcnt(fd);
+ stbuf->st_atime = now;
+ stbuf->st_mtime = now;
+ stbuf->st_ctime = now;
+
+ return 0;
+}
+
+
+static int rbdfs_open(const char *path, struct fuse_file_info *fi)
+{
+ int fd;
+
+ if (!gotrados)
+ return -ENXIO;
+
+ if (path[0] == 0)
+ return -ENOENT;
+
+ readdir_lock.lock();
+ enumerate_images(&rbd_image_data);
+ readdir_lock.unlock();
+ fd = open_rbd_image(path + 1);
+ if (fd < 0)
+ return -ENOENT;
+
+ fi->fh = fd;
+ return 0;
+}
+
+static int rbdfs_read(const char *path, char *buf, size_t size,
+ off_t offset, struct fuse_file_info *fi)
+{
+ size_t numread;
+ struct rbd_openimage *rbd;
+
+ if (!gotrados)
+ return -ENXIO;
+
+ rbd = &opentbl[fi->fh];
+ numread = 0;
+ while (size > 0) {
+ ssize_t ret;
+
+ ret = rbd_read(rbd->image, offset, size, buf);
+
+ if (ret <= 0)
+ break;
+ buf += ret;
+ size -= ret;
+ offset += ret;
+ numread += ret;
+ }
+
+ return numread;
+}
+
+static int rbdfs_write(const char *path, const char *buf, size_t size,
+ off_t offset, struct fuse_file_info *fi)
+{
+ size_t numwritten;
+ struct rbd_openimage *rbd;
+
+ if (!gotrados)
+ return -ENXIO;
+
+ rbd = &opentbl[fi->fh];
+ numwritten = 0;
+ while (size > 0) {
+ ssize_t ret;
+
+ if ((size_t)(offset + size) > rbdsize(fi->fh)) {
+ int r;
+ fprintf(stderr, "rbdfs_write resizing %s to 0x%" PRIxMAX "\n",
+ path, offset+size);
+ r = rbd_resize(rbd->image, offset+size);
+ if (r < 0)
+ return r;
+
+ r = rbd_stat(rbd->image, &(rbd->rbd_stat.rbd_info),
+ sizeof(rbd_image_info_t));
+ if (r < 0)
+ return r;
+ }
+ ret = rbd_write(rbd->image, offset, size, buf);
+
+ if (ret < 0)
+ break;
+ buf += ret;
+ size -= ret;
+ offset += ret;
+ numwritten += ret;
+ }
+
+ return numwritten;
+}
+
+static void rbdfs_statfs_image_cb(void *num, const char *image)
+{
+ int fd;
+
+ ((uint64_t *)num)[0]++;
+
+ fd = open_rbd_image(image);
+ if (fd >= 0)
+ ((uint64_t *)num)[1] += rbdsize(fd);
+}
+
+static int rbdfs_statfs(const char *path, struct statvfs *buf)
+{
+ uint64_t num[2];
+
+ if (!gotrados)
+ return -ENXIO;
+
+ num[0] = 1;
+ num[1] = 0;
+ readdir_lock.lock();
+ enumerate_images(&rbd_image_data);
+ readdir_lock.unlock();
+ iter_images(num, rbdfs_statfs_image_cb);
+
+#define RBDFS_BSIZE 4096
+ buf->f_bsize = RBDFS_BSIZE;
+ buf->f_frsize = RBDFS_BSIZE;
+ buf->f_blocks = num[1] / RBDFS_BSIZE;
+ buf->f_bfree = 0;
+ buf->f_bavail = 0;
+ buf->f_files = num[0];
+ buf->f_ffree = 0;
+ buf->f_favail = 0;
+ buf->f_fsid = 0;
+ buf->f_flag = 0;
+ buf->f_namemax = PATH_MAX;
+
+ return 0;
+}
+
+static int rbdfs_fsync(const char *path, int datasync,
+ struct fuse_file_info *fi)
+{
+ if (!gotrados)
+ return -ENXIO;
+ rbd_flush(opentbl[fi->fh].image);
+ return 0;
+}
+
+static int rbdfs_opendir(const char *path, struct fuse_file_info *fi)
+{
+ // only one directory, so global "in_opendir" flag should be fine
+ readdir_lock.lock();
+ in_opendir++;
+ enumerate_images(&rbd_image_data);
+ readdir_lock.unlock();
+ return 0;
+}
+
+struct rbdfs_readdir_info {
+ void *buf;
+ fuse_fill_dir_t filler;
+};
+
+static void rbdfs_readdir_cb(void *_info, const char *name)
+{
+ struct rbdfs_readdir_info *info = (struct rbdfs_readdir_info*) _info;
+
+ filler_compat(info->filler, info->buf, name, NULL, 0);
+}
+
+static int rbdfs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
+ off_t offset, struct fuse_file_info *fi
+#if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 0)
+ , enum fuse_readdir_flags
+#endif
+ )
+{
+ struct rbdfs_readdir_info info = { buf, filler };
+
+ if (!gotrados)
+ return -ENXIO;
+ if (!in_opendir)
+ fprintf(stderr, "in readdir, but not inside opendir?\n");
+
+ if (strcmp(path, "/") != 0)
+ return -ENOENT;
+
+ filler_compat(filler, buf, ".", NULL, 0);
+ filler_compat(filler, buf, "..", NULL, 0);
+ iter_images(&info, rbdfs_readdir_cb);
+
+ return 0;
+}
+static int rbdfs_releasedir(const char *path, struct fuse_file_info *fi)
+{
+ // see opendir comments
+ readdir_lock.lock();
+ in_opendir--;
+ readdir_lock.unlock();
+ return 0;
+}
+
+void *
+rbdfs_init(struct fuse_conn_info *conn
+#if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 0)
+ , struct fuse_config *cfg
+#endif
+ )
+{
+ int ret;
+
+ // init cannot fail, so if we fail here, gotrados remains at 0,
+ // causing other operations to fail immediately with ENXIO
+
+ ret = connect_to_cluster(&cluster);
+ if (ret < 0)
+ exit(90);
+
+ pool_name = rbd_options.pool_name;
+ nspace_name = rbd_options.nspace_name;
+ mount_image_name = rbd_options.image_name;
+ ret = rados_ioctx_create(cluster, pool_name, &ioctx);
+ if (ret < 0)
+ exit(91);
+#if FUSE_VERSION >= FUSE_MAKE_VERSION(2, 8) && FUSE_VERSION < FUSE_MAKE_VERSION(3, 0)
+ conn->want |= FUSE_CAP_BIG_WRITES;
+#endif
+ rados_ioctx_set_namespace(ioctx, nspace_name);
+ gotrados = 1;
+
+ // init's return value shows up in fuse_context.private_data,
+ // also to void (*destroy)(void *); useful?
+ return NULL;
+}
+
+void
+rbdfs_destroy(void *unused)
+{
+ if (!gotrados)
+ return;
+ for (int i = 0; i < MAX_RBD_IMAGES; ++i) {
+ if (opentbl[i].image) {
+ rbd_close(opentbl[i].image);
+ opentbl[i].image = NULL;
+ }
+ }
+ rados_ioctx_destroy(ioctx);
+ rados_shutdown(cluster);
+}
+
+int
+rbdfs_checkname(const char *checkname)
+{
+ const char *extra[] = {"@", "/"};
+ std::string strCheckName(checkname);
+
+ if (strCheckName.empty())
+ return -EINVAL;
+
+ unsigned int sz = sizeof(extra) / sizeof(const char*);
+ for (unsigned int i = 0; i < sz; i++)
+ {
+ std::string ex(extra[i]);
+ if (std::string::npos != strCheckName.find(ex))
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+// return -errno on error. fi->fh is not set until open time
+
+int
+rbdfs_create(const char *path, mode_t mode, struct fuse_file_info *fi)
+{
+ int r;
+ int order = imageorder;
+
+ r = rbdfs_checkname(path+1);
+ if (r != 0)
+ {
+ return r;
+ }
+
+ r = rbd_create2(ioctx, path+1, imagesize, imagefeatures, &order);
+ return r;
+}
+
+int
+rbdfs_rename(const char *path, const char *destname
+#if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 0)
+ , unsigned int flags
+#endif
+ )
+{
+ int r;
+
+ r = rbdfs_checkname(destname+1);
+ if (r != 0)
+ {
+ return r;
+ }
+
+ if (strcmp(path, "/") == 0)
+ return -EINVAL;
+
+ return rbd_rename(ioctx, path+1, destname+1);
+}
+
+int
+rbdfs_utimens(const char *path, const struct timespec tv[2]
+#if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 0)
+ , struct fuse_file_info *fi
+#endif
+ )
+{
+ // called on create; not relevant
+ return 0;
+}
+
+int
+rbdfs_unlink(const char *path)
+{
+ int fd = find_openrbd(path+1);
+ if (fd != -1) {
+ struct rbd_openimage *rbd = &opentbl[fd];
+ rbd_close(rbd->image);
+ rbd->image = 0;
+ free(rbd->image_name);
+ rbd->rbd_stat.valid = 0;
+ }
+ return rbd_remove(ioctx, path+1);
+}
+
+
+int
+rbdfs_truncate(const char *path, off_t size
+#if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 0)
+ , struct fuse_file_info *fi
+#endif
+ )
+{
+ int fd;
+ int r;
+ struct rbd_openimage *rbd;
+
+ if ((fd = open_rbd_image(path+1)) < 0)
+ return -ENOENT;
+
+ rbd = &opentbl[fd];
+ fprintf(stderr, "truncate %s to %" PRIdMAX " (0x%" PRIxMAX ")\n",
+ path, size, size);
+ r = rbd_resize(rbd->image, size);
+ if (r < 0)
+ return r;
+
+ r = rbd_stat(rbd->image, &(rbd->rbd_stat.rbd_info),
+ sizeof(rbd_image_info_t));
+ if (r < 0)
+ return r;
+ return 0;
+}
+
+/**
+ * set an xattr on path, with name/value, length size.
+ * Presumably flags are from Linux, as in XATTR_CREATE or
+ * XATTR_REPLACE (both "set", but fail if exist vs fail if not exist.
+ *
+ * We accept xattrs only on the root node.
+ *
+ * All values converted with strtoull, so can be expressed in any base
+ */
+
+struct rbdfuse_attr {
+ char *attrname;
+ uint64_t *attrvalp;
+} attrs[] = {
+ { (char*) "user.rbdfuse.imagesize", &imagesize },
+ { (char*) "user.rbdfuse.imageorder", &imageorder },
+ { (char*) "user.rbdfuse.imagefeatures", &imagefeatures },
+ { NULL, NULL }
+};
+
+int
+rbdfs_setxattr(const char *path, const char *name, const char *value,
+ size_t size,
+ int flags
+#if defined(DARWIN)
+ ,uint32_t pos
+#endif
+ )
+{
+ struct rbdfuse_attr *ap;
+ if (strcmp(path, "/") != 0)
+ return -EINVAL;
+
+ for (ap = attrs; ap->attrname != NULL; ap++) {
+ if (strcmp(name, ap->attrname) == 0) {
+ *ap->attrvalp = strtoull(value, NULL, 0);
+ fprintf(stderr, "rbd-fuse: %s set to 0x%" PRIx64 "\n",
+ ap->attrname, *ap->attrvalp);
+ return 0;
+ }
+ }
+ return -EINVAL;
+}
+
+int
+rbdfs_getxattr(const char *path, const char *name, char *value,
+ size_t size
+#if defined(DARWIN)
+ ,uint32_t position
+#endif
+ )
+{
+ struct rbdfuse_attr *ap;
+ char buf[128];
+ // allow gets on other files; ls likes to ask for things like
+ // security.*
+
+ for (ap = attrs; ap->attrname != NULL; ap++) {
+ if (strcmp(name, ap->attrname) == 0) {
+ sprintf(buf, "%" PRIu64, *ap->attrvalp);
+ if (value != NULL && size >= strlen(buf))
+ strcpy(value, buf);
+ fprintf(stderr, "rbd-fuse: get %s\n", ap->attrname);
+ return (strlen(buf));
+ }
+ }
+ return 0;
+}
+
+int
+rbdfs_listxattr(const char *path, char *list, size_t len)
+{
+ struct rbdfuse_attr *ap;
+ size_t required_len = 0;
+
+ if (strcmp(path, "/") != 0)
+ return -EINVAL;
+
+ for (ap = attrs; ap->attrname != NULL; ap++)
+ required_len += strlen(ap->attrname) + 1;
+ if (len >= required_len) {
+ for (ap = attrs; ap->attrname != NULL; ap++) {
+ sprintf(list, "%s", ap->attrname);
+ list += strlen(ap->attrname) + 1;
+ }
+ }
+ return required_len;
+}
+
+const static struct fuse_operations rbdfs_oper = {
+ getattr: rbdfs_getattr,
+ readlink: 0,
+#if FUSE_VERSION < FUSE_MAKE_VERSION(3, 0)
+ getdir: 0,
+#endif
+ mknod: 0,
+ mkdir: 0,
+ unlink: rbdfs_unlink,
+ rmdir: 0,
+ symlink: 0,
+ rename: rbdfs_rename,
+ link: 0,
+ chmod: 0,
+ chown: 0,
+ truncate: rbdfs_truncate,
+#if FUSE_VERSION < FUSE_MAKE_VERSION(3, 0)
+ utime: 0,
+#endif
+ open: rbdfs_open,
+ read: rbdfs_read,
+ write: rbdfs_write,
+ statfs: rbdfs_statfs,
+ flush: 0,
+ release: 0,
+ fsync: rbdfs_fsync,
+ setxattr: rbdfs_setxattr,
+ getxattr: rbdfs_getxattr,
+ listxattr: rbdfs_listxattr,
+ removexattr: 0,
+ opendir: rbdfs_opendir,
+ readdir: rbdfs_readdir,
+ releasedir: rbdfs_releasedir,
+ fsyncdir: 0,
+ init: rbdfs_init,
+ destroy: rbdfs_destroy,
+ access: 0,
+ create: rbdfs_create,
+#if FUSE_VERSION < FUSE_MAKE_VERSION(3, 0)
+ ftruncate: 0,
+ fgetattr: 0,
+#endif
+ lock: 0,
+ utimens: rbdfs_utimens,
+ /* skip unimplemented */
+};
+
+} /* extern "C" */
+
+enum {
+ KEY_HELP,
+ KEY_VERSION,
+ KEY_RADOS_POOLNAME,
+ KEY_RADOS_POOLNAME_LONG,
+ KEY_RADOS_NSPACENAME,
+ KEY_RADOS_NSPACENAME_LONG,
+ KEY_RBD_IMAGENAME,
+ KEY_RBD_IMAGENAME_LONG
+};
+
+static struct fuse_opt rbdfs_opts[] = {
+ FUSE_OPT_KEY("-h", KEY_HELP),
+ FUSE_OPT_KEY("--help", KEY_HELP),
+ FUSE_OPT_KEY("-V", KEY_VERSION),
+ FUSE_OPT_KEY("--version", KEY_VERSION),
+ {"-p %s", offsetof(struct rbd_options, pool_name), KEY_RADOS_POOLNAME},
+ {"--poolname=%s", offsetof(struct rbd_options, pool_name),
+ KEY_RADOS_POOLNAME_LONG},
+ {"-s %s", offsetof(struct rbd_options, nspace_name), KEY_RADOS_NSPACENAME},
+ {"--namespace=%s", offsetof(struct rbd_options, nspace_name),
+ KEY_RADOS_NSPACENAME_LONG},
+ {"-r %s", offsetof(struct rbd_options, image_name), KEY_RBD_IMAGENAME},
+ {"--image=%s", offsetof(struct rbd_options, image_name),
+ KEY_RBD_IMAGENAME_LONG},
+ FUSE_OPT_END
+};
+
+static void usage(const char *progname)
+{
+ fprintf(stderr,
+"Usage: %s mountpoint [options]\n"
+"\n"
+"General options:\n"
+" -h --help print help\n"
+" -V --version print version\n"
+" -c --conf ceph configuration file [/etc/ceph/ceph.conf]\n"
+" -p --poolname rados pool name [rbd]\n"
+" -s --namespace rados namespace name []\n"
+" -r --image RBD image name\n"
+"\n", progname);
+}
+
+static int rbdfs_opt_proc(void *data, const char *arg, int key,
+ struct fuse_args *outargs)
+{
+ if (key == KEY_HELP) {
+ usage(outargs->argv[0]);
+ fuse_opt_add_arg(outargs, "-ho");
+ fuse_main(outargs->argc, outargs->argv, &rbdfs_oper, NULL);
+ exit(1);
+ }
+
+ if (key == KEY_VERSION) {
+ fuse_opt_add_arg(outargs, "--version");
+ fuse_main(outargs->argc, outargs->argv, &rbdfs_oper, NULL);
+ exit(0);
+ }
+
+ if (key == KEY_RADOS_POOLNAME) {
+ if (rbd_options.pool_name != NULL) {
+ free(rbd_options.pool_name);
+ rbd_options.pool_name = NULL;
+ }
+ rbd_options.pool_name = strdup(arg+2);
+ return 0;
+ }
+
+ if (key == KEY_RADOS_NSPACENAME) {
+ if (rbd_options.nspace_name != NULL) {
+ free(rbd_options.nspace_name);
+ rbd_options.nspace_name = NULL;
+ }
+ rbd_options.nspace_name = strdup(arg+2);
+ return 0;
+ }
+
+ if (key == KEY_RBD_IMAGENAME) {
+ if (rbd_options.image_name!= NULL) {
+ free(rbd_options.image_name);
+ rbd_options.image_name = NULL;
+ }
+ rbd_options.image_name = strdup(arg+2);
+ return 0;
+ }
+
+ return 1;
+}
+
+void
+simple_err(const char *msg, int err)
+{
+ fprintf(stderr, "%s: %s\n", msg, strerror(-err));
+ return;
+}
+
+int
+connect_to_cluster(rados_t *pcluster)
+{
+ int r;
+ global_init_postfork_start(g_ceph_context);
+ common_init_finish(g_ceph_context);
+ global_init_postfork_finish(g_ceph_context);
+
+ r = rados_create_with_context(pcluster, g_ceph_context);
+ if (r < 0) {
+ simple_err("Could not create cluster handle", r);
+ return r;
+ }
+
+ r = rados_connect(*pcluster);
+ if (r < 0) {
+ simple_err("Error connecting to cluster", r);
+ rados_shutdown(*pcluster);
+ return r;
+ }
+
+ return 0;
+}
+
+int main(int argc, const char *argv[])
+{
+ memset(&rbd_image_data, 0, sizeof(rbd_image_data));
+
+ // librados will filter out -f/-d options from command-line
+ std::map<std::string, bool> filter_args = {
+ {"-f", false},
+ {"-d", false}};
+
+ std::vector<const char*> arg_vector;
+ for (auto idx = 0; idx < argc; ++idx) {
+ auto it = filter_args.find(argv[idx]);
+ if (it != filter_args.end()) {
+ it->second = true;
+ }
+ arg_vector.push_back(argv[idx]);
+ }
+
+ auto cct = global_init(NULL, arg_vector, CEPH_ENTITY_TYPE_CLIENT,
+ CODE_ENVIRONMENT_DAEMON,
+ CINIT_FLAG_UNPRIVILEGED_DAEMON_DEFAULTS);
+ g_ceph_context->_conf.set_val_or_die("pid_file", "");
+ g_ceph_context->_conf.set_val_or_die("daemonize", "true");
+
+ if (global_init_prefork(g_ceph_context) < 0) {
+ fprintf(stderr, "Failed to initialize librados\n");
+ exit(1);
+ }
+
+ for (auto& it : filter_args) {
+ if (it.second) {
+ arg_vector.push_back(it.first.c_str());
+ }
+ }
+
+ struct fuse_args args = FUSE_ARGS_INIT((int)arg_vector.size(),
+ (char**)&arg_vector.front());
+ if (fuse_opt_parse(&args, &rbd_options, rbdfs_opts,
+ rbdfs_opt_proc) == -1) {
+ exit(1);
+ }
+
+ return fuse_main(args.argc, args.argv, &rbdfs_oper, NULL);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-08 09:02:27 +0000