X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fceph%2Fsrc%2Fmount%2Fmount.ceph.c;fp=src%2Fceph%2Fsrc%2Fmount%2Fmount.ceph.c;h=e8fdfcd5496d5edb6ab8377563f0a08b2fd6db6c;hb=812ff6ca9fcd3e629e49d4328905f33eee8ca3f5;hp=0000000000000000000000000000000000000000;hpb=15280273faafb77777eab341909a3f495cf248d9;p=stor4nfv.git

diff --git a/src/ceph/src/mount/mount.ceph.c b/src/ceph/src/mount/mount.ceph.c
new file mode 100644
index 0000000..e8fdfcd
--- /dev/null
+++ b/src/ceph/src/mount/mount.ceph.c
@@ -0,0 +1,373 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <sys/mount.h>
+
+#include "common/module.h"
+#include "common/secret.h"
+#include "include/addr_parsing.h"
+
+#ifndef MS_RELATIME
+# define MS_RELATIME (1<<21)
+#endif
+
+#define MAX_SECRET_LEN 1000
+#define MAX_SECRET_OPTION_LEN (MAX_SECRET_LEN + 7)
+
+int verboseflag = 0;
+int skip_mtab_flag = 0;
+static const char * const EMPTY_STRING = "";
+
+/* TODO duplicates logic from kernel */
+#define CEPH_AUTH_NAME_DEFAULT "guest"
+
+#include "mtab.c"
+
+static void block_signals (int how)
+{
+     sigset_t sigs;
+
+     sigfillset (&sigs);
+     sigdelset(&sigs, SIGTRAP);
+     sigdelset(&sigs, SIGSEGV);
+     sigprocmask (how, &sigs, (sigset_t *) 0);
+}
+
+static char *mount_resolve_src(const char *orig_str)
+{
+	int len, pos;
+	char *mount_path;
+	char *src;
+	char *buf = strdup(orig_str);
+
+	mount_path = strstr(buf, ":/");
+	if (!mount_path) {
+		printf("source mount path was not specified\n");
+		free(buf);
+		return NULL;
+	}
+	if (mount_path == buf) {
+		printf("server address expected\n");
+		free(buf);
+		return NULL;
+	}
+
+	*mount_path = '\0';
+	mount_path++;
+
+	if (!*mount_path) {
+		printf("incorrect source mount path\n");
+		free(buf);
+		return NULL;
+	}
+
+	src = resolve_addrs(buf);
+	if (!src) {
+		free(buf);
+		return NULL;
+	}
+
+	len = strlen(src);
+	pos = safe_cat(&src, &len, len, ":");
+	safe_cat(&src, &len, pos, mount_path);
+
+	free(buf);
+	return src;
+}
+
+/*
+ * this one is partialy based on parse_options() from cifs.mount.c
+ */
+static char *parse_options(const char *data, int *filesys_flags)
+{
+	char * next_keyword = NULL;
+	char * out = NULL;
+	int out_len = 0;
+	int pos = 0;
+	char *name = NULL;
+	int name_len = 0;
+	int name_pos = 0;
+	char secret[MAX_SECRET_LEN];
+	char *saw_name = NULL;
+	char *saw_secret = NULL;
+
+	if(verboseflag)
+		printf("parsing options: %s\n", data);
+
+	do {
+		char * value = NULL;
+		/*  check if ends with trailing comma */
+		if(*data == 0)
+			break;
+		next_keyword = strchr(data,',');
+	
+		/* temporarily null terminate end of keyword=value pair */
+		if(next_keyword)
+			*next_keyword++ = 0;
+
+		/* temporarily null terminate keyword to make keyword and value distinct */
+		if ((value = strchr(data, '=')) != NULL) {
+			*value = '\0';
+			value++;
+		}
+
+		int skip = 1;
+
+		if (strncmp(data, "ro", 2) == 0) {
+			*filesys_flags |= MS_RDONLY;
+		} else if (strncmp(data, "rw", 2) == 0) {
+			*filesys_flags &= ~MS_RDONLY;
+		} else if (strncmp(data, "nosuid", 6) == 0) {
+			*filesys_flags |= MS_NOSUID;
+		} else if (strncmp(data, "suid", 4) == 0) {
+			*filesys_flags &= ~MS_NOSUID;
+		} else if (strncmp(data, "dev", 3) == 0) {
+			*filesys_flags &= ~MS_NODEV;
+		} else if (strncmp(data, "nodev", 5) == 0) {
+			*filesys_flags |= MS_NODEV;
+		} else if (strncmp(data, "noexec", 6) == 0) {
+			*filesys_flags |= MS_NOEXEC;
+		} else if (strncmp(data, "exec", 4) == 0) {
+			*filesys_flags &= ~MS_NOEXEC;
+                } else if (strncmp(data, "sync", 4) == 0) {
+                        *filesys_flags |= MS_SYNCHRONOUS;
+                } else if (strncmp(data, "remount", 7) == 0) {
+                        *filesys_flags |= MS_REMOUNT;
+                } else if (strncmp(data, "mandlock", 8) == 0) {
+                        *filesys_flags |= MS_MANDLOCK;
+		} else if ((strncmp(data, "nobrl", 5) == 0) || 
+			   (strncmp(data, "nolock", 6) == 0)) {
+			*filesys_flags &= ~MS_MANDLOCK;
+		} else if (strncmp(data, "noatime", 7) == 0) {
+			*filesys_flags |= MS_NOATIME;
+		} else if (strncmp(data, "nodiratime", 10) == 0) {
+			*filesys_flags |= MS_NODIRATIME;
+		} else if (strncmp(data, "relatime", 8) == 0) {
+			*filesys_flags |= MS_RELATIME;
+
+		} else if (strncmp(data, "noauto", 6) == 0) {
+			skip = 1;  /* ignore */
+		} else if (strncmp(data, "_netdev", 7) == 0) {
+			skip = 1;  /* ignore */
+
+		} else if (strncmp(data, "secretfile", 10) == 0) {
+			if (!value || !*value) {
+				printf("keyword secretfile found, but no secret file specified\n");
+				free(saw_name);
+				return NULL;
+			}
+
+			if (read_secret_from_file(value, secret, sizeof(secret)) < 0) {
+				printf("error reading secret file\n");
+				return NULL;
+			}
+
+			/* see comment for "secret" */
+			saw_secret = secret;
+			skip = 1;
+		} else if (strncmp(data, "secret", 6) == 0) {
+			if (!value || !*value) {
+				printf("mount option secret requires a value.\n");
+				free(saw_name);
+				return NULL;
+			}
+
+			/* secret is only added to kernel options as
+			   backwards compatibility, if add_key doesn't
+			   recognize our keytype; hence, it is skipped
+			   here and appended to options on add_key
+			   failure */
+			size_t len = sizeof(secret);
+			strncpy(secret, value, len-1);
+			secret[len-1] = '\0';
+			saw_secret = secret;
+			skip = 1;
+		} else if (strncmp(data, "name", 4) == 0) {
+			if (!value || !*value) {
+				printf("mount option name requires a value.\n");
+				return NULL;
+			}
+
+			/* take a copy of the name, to be used for
+			   naming the keys that we add to kernel; */
+			free(saw_name);
+			saw_name = strdup(value);
+			if (!saw_name) {
+				printf("out of memory.\n");
+				return NULL;
+			}
+			skip = 0;
+		} else {
+			skip = 0;
+			if (verboseflag) {
+			  fprintf(stderr, "mount.ceph: unrecognized mount option \"%s\", "
+			                  "passing to kernel.\n", data);
+            }
+		}
+
+		/* Copy (possibly modified) option to out */
+		if (!skip) {
+			if (pos)
+				pos = safe_cat(&out, &out_len, pos, ",");
+
+			if (value) {
+				pos = safe_cat(&out, &out_len, pos, data);
+				pos = safe_cat(&out, &out_len, pos, "=");
+				pos = safe_cat(&out, &out_len, pos, value);
+			} else {
+				pos = safe_cat(&out, &out_len, pos, data);
+			}
+			
+		}
+		data = next_keyword;
+	} while (data);
+
+	name_pos = safe_cat(&name, &name_len, name_pos, "client.");
+	if (!saw_name) {
+		name_pos = safe_cat(&name, &name_len, name_pos, CEPH_AUTH_NAME_DEFAULT);
+	} else {
+		name_pos = safe_cat(&name, &name_len, name_pos, saw_name);
+	}
+	if (saw_secret || is_kernel_secret(name)) {
+		int ret;
+		char secret_option[MAX_SECRET_OPTION_LEN];
+		ret = get_secret_option(saw_secret, name, secret_option, sizeof(secret_option));
+		if (ret < 0) {
+			free(saw_name);
+			return NULL;
+		} else {
+			if (pos) {
+				pos = safe_cat(&out, &out_len, pos, ",");
+			}
+			pos = safe_cat(&out, &out_len, pos, secret_option);
+		}
+	}
+
+	free(saw_name);
+	if (!out)
+		return strdup(EMPTY_STRING);
+	return out;
+}
+
+
+static int parse_arguments(int argc, char *const *const argv,
+		const char **src, const char **node, const char **opts)
+{
+	int i;
+
+	if (argc < 2) {
+		// There were no arguments. Just show the usage.
+		return 1;
+	}
+	if ((!strcmp(argv[1], "-h")) || (!strcmp(argv[1], "--help"))) {
+		// The user asked for help.
+		return 1;
+	}
+
+	// The first two arguments are positional
+	if (argc < 3)
+		return -EINVAL;
+	*src = argv[1];
+	*node = argv[2];
+
+	// Parse the remaining options
+	*opts = EMPTY_STRING;
+	for (i = 3; i < argc; ++i) {
+		if (!strcmp("-h", argv[i]))
+			return 1;
+		else if (!strcmp("-n", argv[i]))
+			skip_mtab_flag = 1;
+		else if (!strcmp("-v", argv[i]))
+			verboseflag = 1;
+		else if (!strcmp("-o", argv[i])) {
+			++i;
+			if (i >= argc) {
+				printf("Option -o requires an argument.\n\n");
+				return -EINVAL;
+			}
+			*opts = argv[i];
+		}
+		else {
+			printf("Can't understand option: '%s'\n\n", argv[i]);
+			return -EINVAL;
+		}
+	}
+	return 0;
+}
+
+/* modprobe failing doesn't necessarily prevent from working, so this
+   returns void */
+static void modprobe(void)
+{
+	int r;
+
+	r = module_load("ceph", NULL);
+	if (r)
+		printf("failed to load ceph kernel module (%d)\n", r);
+}
+
+static void usage(const char *prog_name)
+{
+	printf("usage: %s [src] [mount-point] [-n] [-v] [-o ceph-options]\n",
+		prog_name);
+	printf("options:\n");
+	printf("\t-h: Print this help\n");
+	printf("\t-n: Do not update /etc/mtab\n");
+	printf("\t-v: Verbose\n");
+	printf("\tceph-options: refer to mount.ceph(8)\n");
+	printf("\n");
+}
+
+int main(int argc, char *argv[])
+{
+	const char *src, *node, *opts;
+	char *rsrc = NULL;
+	char *popts = NULL;
+	int flags = 0;
+	int retval = 0;
+
+	retval = parse_arguments(argc, argv, &src, &node, &opts);
+	if (retval) {
+		usage(argv[0]);
+		exit((retval > 0) ? EXIT_SUCCESS : EXIT_FAILURE);
+	}
+
+	rsrc = mount_resolve_src(src);
+	if (!rsrc) {
+		printf("failed to resolve source\n");
+		exit(1);
+	}
+
+	modprobe();
+
+	popts = parse_options(opts, &flags);
+	if (!popts) {
+		printf("failed to parse ceph_options\n");
+		exit(1);
+	}
+
+	block_signals(SIG_BLOCK);
+
+	if (mount(rsrc, node, "ceph", flags, popts)) {
+		retval = errno;
+		switch (errno) {
+		case ENODEV:
+			printf("mount error: ceph filesystem not supported by the system\n");
+			break;
+		default:
+			printf("mount error %d = %s\n",errno,strerror(errno));
+		}
+	} else {
+		if (!skip_mtab_flag) {
+			update_mtab_entry(rsrc, node, "ceph", popts, flags, 0, 0);
+		}
+	}
+
+	block_signals(SIG_UNBLOCK);
+
+	free(popts);
+	free(rsrc);
+	exit(retval);
+}
+