#include <sys/stat.h>
#include <sys/utsname.h>
#include <linux/loop.h>
+#include <dlfcn.h>
extern char *progname;
extern int verbose;
#define vprint(fmt, arg...) if (verbose > 0) printf(fmt, ##arg)
#define verrprint(fmt, arg...) if (verbose >= 0) fprintf(stderr, fmt, ##arg)
+static struct module_backfs_ops *backfs_ops[LDD_MT_LAST];
+
void fatal(void)
{
verbose = 0;
return 0;
}
+#define DLSYM(prefix, sym, func) \
+ do { \
+ char _fname[64]; \
+ snprintf(_fname, sizeof(_fname), "%s_%s", prefix, #func); \
+ sym->func = (typeof(sym->func))dlsym(sym->dl_handle, _fname); \
+ } while (0)
+
+/**
+ * Load plugin for a given mount_type from ${pkglibdir}/mount_osd_FSTYPE.so and
+ * return struct of function pointers (will be freed in unloack_backfs_module).
+ *
+ * \param[in] mount_type Mount type to load module for.
+ * \retval Value of backfs_ops struct
+ * \retval NULL if no module exists
+ */
+struct module_backfs_ops *load_backfs_module(enum ldd_mount_type mount_type)
+{
+ void *handle;
+ char *error, filename[512], fsname[512], *name;
+ struct module_backfs_ops *ops;
+
+ /* This deals with duplicate ldd_mount_types resolving to same OSD layer
+ * plugin (e.g. ext3/ldiskfs/ldiskfs2 all being ldiskfs) */
+ strncpy(fsname, mt_type(mount_type), sizeof(fsname));
+ name = fsname + sizeof("osd-") - 1;
+
+ /* change osd- to osd_ */
+ fsname[sizeof("osd-") - 2] = '_';
+
+ snprintf(filename, sizeof(filename), PLUGIN_DIR"/mount_%s.so", fsname);
+
+ handle = dlopen(filename, RTLD_LAZY);
+ if (handle == NULL)
+ /* Do not clutter up console with missing types */
+ return NULL;
+
+ ops = malloc(sizeof(*ops));
+ if (ops == NULL) {
+ dlclose(handle);
+ return NULL;
+ }
+
+ ops->dl_handle = handle;
+ dlerror(); /* Clear any existing error */
+
+ DLSYM(name, ops, init);
+ DLSYM(name, ops, fini);
+ DLSYM(name, ops, read_ldd);
+ DLSYM(name, ops, write_ldd);
+ DLSYM(name, ops, is_lustre);
+ DLSYM(name, ops, make_lustre);
+ DLSYM(name, ops, prepare_lustre);
+ DLSYM(name, ops, tune_lustre);
+ DLSYM(name, ops, label_lustre);
+ DLSYM(name, ops, enable_quota);
+
+ error = dlerror();
+ if (error != NULL) {
+ fatal();
+ fprintf(stderr, "%s\n", error);
+ dlclose(handle);
+ free(ops);
+ return NULL;
+ }
+ return ops;
+}
+
+/**
+ * Unload plugin and free backfs_ops structure. Must be called the same number
+ * of times as load_backfs_module is.
+ */
+void unload_backfs_module(struct module_backfs_ops *ops)
+{
+ if (ops == NULL)
+ return;
+
+ dlclose(ops->dl_handle);
+ free(ops);
+}
+
+/* Return true if backfs_ops has operations for the given mount_type. */
+int backfs_mount_type_okay(enum ldd_mount_type mount_type)
+{
+ if (unlikely(mount_type >= LDD_MT_LAST || mount_type < 0)) {
+ fatal();
+ fprintf(stderr, "fs type out of range %d\n", mount_type);
+ return 0;
+ }
+ if (backfs_ops[mount_type] == NULL) {
+ fatal();
+ fprintf(stderr, "unhandled fs type %d '%s'\n",
+ mount_type, mt_str(mount_type));
+ return 0;
+ }
+ return 1;
+}
+
/* Write the server config files */
int osd_write_ldd(struct mkfs_opts *mop)
{
struct lustre_disk_data *ldd = &mop->mo_ldd;
int ret;
- switch (ldd->ldd_mount_type) {
-#ifdef HAVE_LDISKFS_OSD
- case LDD_MT_LDISKFS:
- case LDD_MT_LDISKFS2:
- ret = ldiskfs_write_ldd(mop);
- break;
-#endif /* HAVE_LDISKFS_OSD */
-#ifdef HAVE_ZFS_OSD
- case LDD_MT_ZFS:
- ret = zfs_write_ldd(mop);
- break;
-#endif /* HAVE_ZFS_OSD */
- default:
- fatal();
- fprintf(stderr, "unknown fs type %d '%s'\n",
- ldd->ldd_mount_type, MT_STR(ldd));
+ if (backfs_mount_type_okay(ldd->ldd_mount_type))
+ ret = backfs_ops[ldd->ldd_mount_type]->write_ldd(mop);
+
+ else
ret = EINVAL;
- break;
- }
return ret;
}
{
int ret;
- switch (ldd->ldd_mount_type) {
-#ifdef HAVE_LDISKFS_OSD
- case LDD_MT_LDISKFS:
- case LDD_MT_LDISKFS2:
- ret = ldiskfs_read_ldd(dev, ldd);
- break;
-#endif /* HAVE_LDISKFS_OSD */
-#ifdef HAVE_ZFS_OSD
- case LDD_MT_ZFS:
- ret = zfs_read_ldd(dev, ldd);
- break;
-#endif /* HAVE_ZFS_OSD */
- default:
- fatal();
- fprintf(stderr, "unknown fs type %d '%s'\n",
- ldd->ldd_mount_type, MT_STR(ldd));
+ if (backfs_mount_type_okay(ldd->ldd_mount_type))
+ ret = backfs_ops[ldd->ldd_mount_type]->read_ldd(dev, ldd);
+
+ else
ret = EINVAL;
- break;
- }
return ret;
}
/* Was this device formatted for Lustre */
int osd_is_lustre(char *dev, unsigned *mount_type)
{
+ int i;
+
vprint("checking for existing Lustre data: ");
-#ifdef HAVE_LDISKFS_OSD
- if (ldiskfs_is_lustre(dev, mount_type)) {
- vprint("found\n");
- return 1;
- }
-#endif /* HAVE_LDISKFS_OSD */
-#ifdef HAVE_ZFS_OSD
- if (zfs_is_lustre(dev, mount_type)) {
- vprint("found\n");
- return 1;
+ for (i = 0; i < LDD_MT_LAST; ++i) {
+ if (backfs_ops[i] != NULL &&
+ backfs_ops[i]->is_lustre(dev, mount_type)) {
+ vprint("found\n");
+ return 1;
+ }
}
-#endif /* HAVE_ZFS_OSD */
vprint("not found\n");
return 0;
struct lustre_disk_data *ldd = &mop->mo_ldd;
int ret;
- switch (ldd->ldd_mount_type) {
-#ifdef HAVE_LDISKFS_OSD
- case LDD_MT_LDISKFS:
- case LDD_MT_LDISKFS2:
- ret = ldiskfs_make_lustre(mop);
- break;
-#endif /* HAVE_LDISKFS_OSD */
-#ifdef HAVE_ZFS_OSD
- case LDD_MT_ZFS:
- ret = zfs_make_lustre(mop);
- break;
-#endif /* HAVE_ZFS_OSD */
- default:
- fatal();
- fprintf(stderr, "unknown fs type %d '%s'\n",
- ldd->ldd_mount_type, MT_STR(ldd));
+ if (backfs_mount_type_okay(ldd->ldd_mount_type))
+ ret = backfs_ops[ldd->ldd_mount_type]->make_lustre(mop);
+
+ else
ret = EINVAL;
- break;
- }
return ret;
}
struct lustre_disk_data *ldd = &mop->mo_ldd;
int ret;
- switch (ldd->ldd_mount_type) {
-#ifdef HAVE_LDISKFS_OSD
- case LDD_MT_LDISKFS:
- case LDD_MT_LDISKFS2:
- ret = ldiskfs_prepare_lustre(mop,
- default_mountopts, default_len,
- always_mountopts, always_len);
- break;
-#endif /* HAVE_LDISKFS_OSD */
-#ifdef HAVE_ZFS_OSD
- case LDD_MT_ZFS:
- ret = zfs_prepare_lustre(mop,
- default_mountopts, default_len,
- always_mountopts, always_len);
- break;
-#endif /* HAVE_ZFS_OSD */
- default:
- fatal();
- fprintf(stderr, "unknown fs type %d '%s'\n",
- ldd->ldd_mount_type, MT_STR(ldd));
+ if (backfs_mount_type_okay(ldd->ldd_mount_type))
+ ret = backfs_ops[ldd->ldd_mount_type]->prepare_lustre(mop,
+ default_mountopts, default_len,
+ always_mountopts, always_len);
+
+ else
ret = EINVAL;
- break;
- }
return ret;
}
struct lustre_disk_data *ldd = &mop->mo_ldd;
int ret;
- switch (ldd->ldd_mount_type) {
-#ifdef HAVE_LDISKFS_OSD
- case LDD_MT_LDISKFS:
- case LDD_MT_LDISKFS2:
- ret = ldiskfs_tune_lustre(dev, mop);
- break;
-#endif /* HAVE_LDISKFS_OSD */
-#ifdef HAVE_ZFS_OSD
- case LDD_MT_ZFS:
- ret = zfs_tune_lustre(dev, mop);
- break;
-#endif /* HAVE_ZFS_OSD */
- default:
- fatal();
- fprintf(stderr, "unknown fs type %d '%s'\n",
- ldd->ldd_mount_type, MT_STR(ldd));
+ if (backfs_mount_type_okay(ldd->ldd_mount_type))
+ ret = backfs_ops[ldd->ldd_mount_type]->tune_lustre(dev, mop);
+
+ else
ret = EINVAL;
- break;
- }
return ret;
}
struct lustre_disk_data *ldd = &mop->mo_ldd;
int ret;
- switch (ldd->ldd_mount_type) {
-#ifdef HAVE_LDISKFS_OSD
- case LDD_MT_LDISKFS:
- case LDD_MT_LDISKFS2:
- ret = ldiskfs_label_lustre(mop);
- break;
-#endif /* HAVE_LDISKFS_OSD */
-#ifdef HAVE_ZFS_OSD
- case LDD_MT_ZFS:
- ret = zfs_label_lustre(mop);
- break;
-#endif /* HAVE_ZFS_OSD */
- default:
- fatal();
- fprintf(stderr, "unknown fs type %d '%s'\n",
- ldd->ldd_mount_type, MT_STR(ldd));
+ if (backfs_mount_type_okay(ldd->ldd_mount_type))
+ ret = backfs_ops[ldd->ldd_mount_type]->label_lustre(mop);
+
+ else
ret = EINVAL;
- break;
- }
return ret;
}
struct lustre_disk_data *ldd = &mop->mo_ldd;
int ret;
- switch (ldd->ldd_mount_type) {
-#ifdef HAVE_LDISKFS_OSD
- case LDD_MT_EXT3:
- case LDD_MT_LDISKFS:
- case LDD_MT_LDISKFS2:
- ret = ldiskfs_enable_quota(mop);
- break;
-#endif /* HAVE_LDISKFS_OSD */
-#ifdef HAVE_ZFS_OSD
- case LDD_MT_ZFS:
- fprintf(stderr, "this option is only valid for ldiskfs\n");
- ret = EINVAL;
- break;
-#endif /* HAVE_ZFS_OSD */
- default:
- fatal();
- fprintf(stderr, "unknown fs type %d '%s'\n",
- ldd->ldd_mount_type, MT_STR(ldd));
+ if (backfs_mount_type_okay(ldd->ldd_mount_type))
+ ret = backfs_ops[ldd->ldd_mount_type]->enable_quota(mop);
+
+ else
ret = EINVAL;
- break;
- }
return ret;
}
int osd_init(void)
{
- int ret = 0;
+ int i, ret = 0;
-#ifdef HAVE_LDISKFS_OSD
- ret = ldiskfs_init();
- if (ret)
- return ret;
-#endif /* HAVE_LDISKFS_OSD */
-#ifdef HAVE_ZFS_OSD
- ret = zfs_init();
- /* we want to be able to set up a ldiskfs-based filesystem w/o
- * the ZFS modules installed, see ORI-425 */
- if (ret)
- ret = 0;
-#endif /* HAVE_ZFS_OSD */
+ for (i = 0; i < LDD_MT_LAST; ++i) {
+ backfs_ops[i] = load_backfs_module(i);
+ if (backfs_ops[i] != NULL)
+ ret = backfs_ops[i]->init();
+ if (ret)
+ break;
+ }
return ret;
}
void osd_fini(void)
{
-#ifdef HAVE_LDISKFS_OSD
- ldiskfs_fini();
-#endif /* HAVE_LDISKFS_OSD */
-#ifdef HAVE_ZFS_OSD
- zfs_fini();
-#endif /* HAVE_ZFS_OSD */
+ int i;
+
+ for (i = 0; i < LDD_MT_LAST; ++i) {
+ if (backfs_ops[i] != NULL) {
+ backfs_ops[i]->fini();
+ unload_backfs_module(backfs_ops[i]);
+ backfs_ops[i] = NULL;
+ }
+ }
}
__u64 get_device_size(char* device)
git://git.whamcloud.com / fs / lustre-release.git / blobdiff