diff options
Diffstat (limited to 'contrib/fuse-lib')
| -rw-r--r-- | contrib/fuse-lib/COPYING.LIB | 482 | ||||
| -rw-r--r-- | contrib/fuse-lib/misc.c | 53 | ||||
| -rw-r--r-- | contrib/fuse-lib/mount-common.c | 282 | ||||
| -rw-r--r-- | contrib/fuse-lib/mount-gluster-compat.h | 105 | ||||
| -rw-r--r-- | contrib/fuse-lib/mount.c | 526 |
5 files changed, 1448 insertions, 0 deletions
diff --git a/contrib/fuse-lib/COPYING.LIB b/contrib/fuse-lib/COPYING.LIB new file mode 100644 index 00000000000..161a3d1d47b --- /dev/null +++ b/contrib/fuse-lib/COPYING.LIB @@ -0,0 +1,482 @@ + GNU LIBRARY GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1991 Free Software Foundation, Inc. + 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + +[This is the first released version of the library GPL. It is + numbered 2 because it goes with version 2 of the ordinary GPL.] + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the + library `Frob' (a library for tweaking knobs) written by James Random Hacker. + + <signature of Ty Coon>, 1 April 1990 + Ty Coon, President of Vice + +That's all there is to it! diff --git a/contrib/fuse-lib/misc.c b/contrib/fuse-lib/misc.c new file mode 100644 index 00000000000..1a9b418e511 --- /dev/null +++ b/contrib/fuse-lib/misc.c @@ -0,0 +1,53 @@ +/* + FUSE: Filesystem in Userspace + Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu> + + This program can be distributed under the terms of the GNU LGPLv2. + See the file COPYING.LIB +*/ + +#include <stdint.h> +#include <string.h> +#include <limits.h> +#include <fcntl.h> +#include "glusterfs/glusterfs.h" +#include "fuse_kernel.h" +#include "fuse-misc.h" + +unsigned long +calc_timeout_sec (double t) +{ + if (t > (double) ULONG_MAX) + return ULONG_MAX; + else if (t < 0.0) + return 0; + else + return (unsigned long) t; +} + +unsigned int +calc_timeout_nsec (double t) +{ + double f = t - (double) calc_timeout_sec (t); + if (f < 0.0) + return 0; + else if (f >= 0.999999999) + return 999999999; + else + return (unsigned int) (f * 1.0e9); +} + +void +convert_fuse_file_lock (struct fuse_file_lock *fl, struct gf_flock *flock, + uint64_t lk_owner) +{ + flock->l_type = fl->type; + flock->l_whence = SEEK_SET; + flock->l_start = fl->start; + if (fl->end == OFFSET_MAX) + flock->l_len = 0; + else + flock->l_len = fl->end - fl->start + 1; + flock->l_pid = fl->pid; + set_lk_owner_from_uint64 (&flock->l_owner, lk_owner); +} diff --git a/contrib/fuse-lib/mount-common.c b/contrib/fuse-lib/mount-common.c new file mode 100644 index 00000000000..cffd4c01ed5 --- /dev/null +++ b/contrib/fuse-lib/mount-common.c @@ -0,0 +1,282 @@ +/* + FUSE: Filesystem in Userspace + Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu> + Copyright (c) 2010 Gluster, Inc. <http://www.gluster.com> + + This program can be distributed under the terms of the GNU LGPLv2. + See the file COPYING.LIB. +*/ + +#include "mount-gluster-compat.h" + +/* + * These functions (and gf_fuse_umount() in mount.c) + * were originally taken from libfuse as of commit 7960e99e + * (http://fuse.git.sourceforge.net/git/gitweb.cgi?p=fuse/fuse;a=commit;h=7960e99e) + * almost verbatim. What has been changed upon adoption: + * - style adopted to that of glusterfs + * - s/fprintf/gf_log/ + * - s/free/FREE/, s/malloc/MALLOC/ + * - there are some other minor things + * + * For changes that were made later and syncs with upstream, + * see the commit log and per-function comments. + */ + +#ifdef GF_LINUX_HOST_OS +/* FUSE: cherry-picked bd99f9cf */ +static int +mtab_needs_update (const char *mnt) +{ + int res; + struct stat stbuf; + + /* If mtab is within new mount, don't touch it */ + if (strncmp (mnt, _PATH_MOUNTED, sizeof (_PATH_MOUNTED) - 1) == 0 && + _PATH_MOUNTED[strlen (mnt)] == '/') + return 0; + + /* + * Skip mtab update if /etc/mtab: + * + * - doesn't exist, + * - is a symlink, + * - is on a read-only filesystem. + */ + res = lstat (_PATH_MOUNTED, &stbuf); + if (res == -1) { + if (errno == ENOENT) + return 0; + } else { + uid_t ruid; + int err; + + if (S_ISLNK (stbuf.st_mode)) + return 0; + + ruid = getuid (); + if (ruid != 0) + setreuid (0, -1); + + res = access (_PATH_MOUNTED, W_OK); + err = (res == -1) ? errno : 0; + if (ruid != 0) + setreuid (ruid, -1); + + if (err == EROFS) + return 0; + } + + return 1; +} +#else /* GF_LINUX_HOST_OS */ +#define mtab_needs_update(x) 1 +#endif /* GF_LINUX_HOST_OS */ + +/* FUSE: called add_mount_legacy(); R.I.P. as of cbd3a2a8 */ +int +fuse_mnt_add_mount (const char *progname, const char *fsname, + const char *mnt, const char *type, const char *opts) +{ + int res; + int status; + sigset_t blockmask; + sigset_t oldmask; + + if (!mtab_needs_update (mnt)) + return 0; + + sigemptyset (&blockmask); + sigaddset (&blockmask, SIGCHLD); + res = sigprocmask (SIG_BLOCK, &blockmask, &oldmask); + if (res == -1) { + GFFUSE_LOGERR ("%s: sigprocmask: %s", + progname, strerror (errno)); + return -1; + } + + res = fork (); + if (res == -1) { + GFFUSE_LOGERR ("%s: fork: %s", progname, strerror (errno)); + goto out_restore; + } + if (res == 0) { + char templ[] = "/tmp/fusermountXXXXXX"; + char *tmp; + + sigprocmask (SIG_SETMASK, &oldmask, NULL); + res = setuid (geteuid ()); + if (res != 0) { + GFFUSE_LOGERR ("%s: setuid: %s", progname, strerror (errno)); + exit (1); + } + + /* + * hide in a directory, where mount isn't able to resolve + * fsname as a valid path + */ + tmp = mkdtemp (templ); + if (!tmp) { + GFFUSE_LOGERR ("%s: failed to create temporary directory", + progname); + exit (1); + } + if (chdir (tmp)) { + GFFUSE_LOGERR ("%s: failed to chdir to %s: %s", + progname, tmp, strerror (errno)); + exit (1); + } + rmdir (tmp); + execl (_PATH_MOUNT, _PATH_MOUNT, "-i", "-f", "-t", type, + "-o", opts, fsname, mnt, NULL); + GFFUSE_LOGERR ("%s: failed to execute %s: %s", + progname, _PATH_MOUNT, strerror (errno)); + exit (1); + } + + res = waitpid (res, &status, 0); + if (res == -1) + GFFUSE_LOGERR ("%s: waitpid: %s", progname, strerror (errno)); + res = (res != -1 && status == 0) ? 0 : -1; + + out_restore: + sigprocmask (SIG_SETMASK, &oldmask, NULL); + return res; +} + +char * +fuse_mnt_resolve_path (const char *progname, const char *orig) +{ + char buf[PATH_MAX]; + char *copy; + char *dst; + char *end; + char *lastcomp; + const char *toresolv; + + if (!orig[0]) { + GFFUSE_LOGERR ("%s: invalid mountpoint '%s'", progname, orig); + return NULL; + } + + copy = strdup (orig); + if (copy == NULL) { + GFFUSE_LOGERR ("%s: failed to allocate memory", progname); + return NULL; + } + + toresolv = copy; + lastcomp = NULL; + for (end = copy + strlen (copy) - 1; end > copy && *end == '/'; end --); + if (end[0] != '/') { + char *tmp; + end[1] = '\0'; + tmp = strrchr (copy, '/'); + if (tmp == NULL) { + lastcomp = copy; + toresolv = "."; + } else { + lastcomp = tmp + 1; + if (tmp == copy) + toresolv = "/"; + } + if (strcmp (lastcomp, ".") == 0 || strcmp (lastcomp, "..") == 0) { + lastcomp = NULL; + toresolv = copy; + } + else if (tmp) + tmp[0] = '\0'; + } + if (realpath (toresolv, buf) == NULL) { + GFFUSE_LOGERR ("%s: bad mount point %s: %s", progname, orig, + strerror (errno)); + FREE (copy); + return NULL; + } + if (lastcomp == NULL) + dst = strdup (buf); + else { + dst = (char *) MALLOC (strlen (buf) + 1 + strlen (lastcomp) + 1); + if (dst) { + unsigned buflen = strlen (buf); + if (buflen && buf[buflen-1] == '/') + sprintf (dst, "%s%s", buf, lastcomp); + else + sprintf (dst, "%s/%s", buf, lastcomp); + } + } + FREE (copy); + if (dst == NULL) + GFFUSE_LOGERR ("%s: failed to allocate memory", progname); + return dst; +} + +/* FUSE: to support some changes that were reverted since + * then, it was split in two (fuse_mnt_umount() and + * exec_umount()); however the actual code is same as here + * since 0197ce40 + */ +int +fuse_mnt_umount (const char *progname, const char *abs_mnt, + const char *rel_mnt, int lazy) +{ + int res; + int status; + sigset_t blockmask; + sigset_t oldmask; + + if (!mtab_needs_update (abs_mnt)) { + res = umount2 (rel_mnt, lazy ? 2 : 0); + if (res == -1) + GFFUSE_LOGERR ("%s: failed to unmount %s: %s", + progname, abs_mnt, strerror (errno)); + return res; + } + + sigemptyset (&blockmask); + sigaddset (&blockmask, SIGCHLD); + res = sigprocmask (SIG_BLOCK, &blockmask, &oldmask); + if (res == -1) { + GFFUSE_LOGERR ("%s: sigprocmask: %s", progname, + strerror (errno)); + return -1; + } + + res = fork (); + if (res == -1) { + GFFUSE_LOGERR ("%s: fork: %s", progname, strerror (errno)); + goto out_restore; + } + if (res == 0) { + sigprocmask (SIG_SETMASK, &oldmask, NULL); + res = setuid (geteuid ()); + if (res != 0) { + GFFUSE_LOGERR ("%s: setuid: %s", progname, strerror (errno)); + exit (1); + } +#ifdef GF_LINUX_HOST_OS + execl ("umount", "umount", "-i", rel_mnt, + lazy ? "-l" : NULL, NULL); + GFFUSE_LOGERR ("%s: failed to execute umount: %s", + progname, strerror (errno)); +#elif __NetBSD__ + /* exitting the filesystem causes the umount */ + exit (0); +#else + execl ("umount", "umount", "-f", rel_mnt, NULL); + GFFUSE_LOGERR ("%s: failed to execute umount: %s", + progname, strerror (errno)); +#endif /* GF_LINUX_HOST_OS */ + exit (1); + } + res = waitpid (res, &status, 0); + if (res == -1) + GFFUSE_LOGERR ("%s: waitpid: %s", progname, strerror (errno)); + + if (status != 0) + res = -1; + + out_restore: + sigprocmask (SIG_SETMASK, &oldmask, NULL); + return res; +} diff --git a/contrib/fuse-lib/mount-gluster-compat.h b/contrib/fuse-lib/mount-gluster-compat.h new file mode 100644 index 00000000000..d3646d08d8e --- /dev/null +++ b/contrib/fuse-lib/mount-gluster-compat.h @@ -0,0 +1,105 @@ +/* + FUSE: Filesystem in Userspace + Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu> + Copyright (c) 2010 Gluster, Inc. <http://www.gluster.com> + + This program can be distributed under the terms of the GNU LGPLv2. + See the file COPYING.LIB. +*/ + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <stddef.h> +#include <limits.h> +#include <fcntl.h> +#include <errno.h> +#include <dirent.h> +#include <signal.h> +#if defined(GF_LINUX_HOST_OS) +#include <mntent.h> +#endif /* GF_LINUX_HOST_OS */ +#include <sys/stat.h> +#include <sys/poll.h> +#include <sys/un.h> +#include <sys/wait.h> +#include <sys/mount.h> + +#ifdef GF_LINUX_HOST_OS +typedef unsigned long mount_flag_t; +#endif + +#if defined(__NetBSD__) +#include <perfuse.h> +#define umount2(dir, flags) unmount(dir, ((flags) != 0) ? MNT_FORCE : 0) +#define MS_RDONLY MNT_RDONLY +#define MS_NOSUID MNT_NOSUID +#define MS_NODEV MNT_NODEV +#define MS_NOATIME MNT_NOATIME +#define MS_NOEXEC MNT_NOEXEC +typedef int mount_flag_t; +#endif + +#if defined(GF_DARWIN_HOST_OS) || defined(__FreeBSD__) +#include <sys/param.h> +#include <sys/mount.h> +#define umount2(dir, flags) unmount(dir, ((flags) != 0) ? MNT_FORCE : 0) +#endif + +#if defined(__FreeBSD__) +#define MS_RDONLY MNT_RDONLY +#define MS_NOSUID MNT_NOSUID +/* "nodev"/MNT_NODEV was removed from FreBSD, as it became unneeded because "As + * of FreeBSD 6.0 device nodes may be created in regular file systems but such + * nodes cannot be used to access devices." (See + * https://freebsd.org/cgi/man.cgi?query=mknod&sektion=8 . + * Also see: + * - https://github.com/freebsd/freebsd/commit/266790a + * - https://github.com/freebsd/freebsd/commit/a5e716d + * - 700008 in + * https://www.freebsd.org/doc/en/books/porters-handbook/versions-7.html .) + */ +#if __FreeBSD_version < 700008 +#define MS_NODEV MNT_NODEV +#else +#define MS_NODEV 0 +#endif +#define MS_NOATIME MNT_NOATIME +#define MS_NOEXEC MNT_NOEXEC +#if __FreeBSD_version < 1000715 +typedef int mount_flag_t; +#else +/* __FreeBSD_version was not bumped for this type change. Anyway, see + * https://github.com/freebsd/freebsd/commit/e8d76f8 + * and respective __FreeBSD_version: + * https://github.com/freebsd/freebsd/blob/e8d76f8/sys/sys/param.h#L61 . + * We use the subsequent value, 1000715, to switch. (Also see: + * https://www.freebsd.org/doc/en/books/porters-handbook/versions-10.html .) + */ +typedef long long mount_flag_t; +#endif +#endif + +#ifdef GF_LINUX_HOST_OS +#define _PATH_MOUNT "/bin/mount" +#else /* FreeBSD, NetBSD, MacOS X */ +#define _PATH_MOUNT "/sbin/mount" +#endif + +#ifdef FUSE_UTIL +#define MALLOC(size) malloc (size) +#define FREE(ptr) free (ptr) +#define GFFUSE_LOGERR(...) fprintf (stderr, ## __VA_ARGS__) +#else /* FUSE_UTIL */ +#include "glusterfs/glusterfs.h" +#include "glusterfs/logging.h" +#include "glusterfs/common-utils.h" + +#define GFFUSE_LOGERR(...) \ + gf_log ("glusterfs-fuse", GF_LOG_ERROR, ## __VA_ARGS__) +#endif /* !FUSE_UTIL */ diff --git a/contrib/fuse-lib/mount.c b/contrib/fuse-lib/mount.c new file mode 100644 index 00000000000..06ff191f542 --- /dev/null +++ b/contrib/fuse-lib/mount.c @@ -0,0 +1,526 @@ +/* + FUSE: Filesystem in Userspace + Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu> + Copyright (c) 2010 Gluster, Inc. <http://www.gluster.com> + + This program can be distributed under the terms of the GNU LGPLv2. + See the file COPYING.LIB. +*/ + +#include "mount_util.h" +#include "mount-gluster-compat.h" + +#ifdef GF_FUSERMOUNT +#define FUSERMOUNT_PROG FUSERMOUNT_DIR "/fusermount-glusterfs" +#else +#define FUSERMOUNT_PROG "fusermount" +#endif +#define FUSE_DEVFD_ENV "_FUSE_DEVFD" + +#ifdef __FreeBSD__ +#include <sys/types.h> +#include <sys/uio.h> +#include <unistd.h> +#endif /* __FreeBSD__ */ + +/* FUSE: function is called fuse_kern_unmount() */ +void +gf_fuse_unmount (const char *mountpoint, int fd) +{ + int res; + int pid; + + if (!mountpoint) + return; + + if (fd != -1) { + struct pollfd pfd; + + pfd.fd = fd; + pfd.events = 0; + res = poll (&pfd, 1, 0); + /* If file poll returns POLLERR on the device file descriptor, + then the filesystem is already unmounted */ + if (res == 1 && (pfd.revents & POLLERR)) + return; + + /* Need to close file descriptor, otherwise synchronous umount + would recurse into filesystem, and deadlock */ + close (fd); + } + + if (geteuid () == 0) { + fuse_mnt_umount ("fuse", mountpoint, mountpoint, 1); + return; + } else { + GFFUSE_LOGERR ("fuse: Effective-uid: %d", geteuid()); + } + + res = umount2 (mountpoint, 2); + if (res == 0) + return; + + GFFUSE_LOGERR ("fuse: failed to unmount %s: %s", + mountpoint, strerror (errno)); + pid = fork (); + if (pid == -1) + return; + + if (pid == 0) { + const char *argv[] = { FUSERMOUNT_PROG, "-u", "-q", "-z", + "--", mountpoint, NULL }; + + execvp (FUSERMOUNT_PROG, (char **)argv); + GFFUSE_LOGERR ("fuse: failed to execute fuserumount: %s", + strerror (errno)); + _exit (1); + } + waitpid (pid, NULL, 0); +} + + +/* gluster-specific routines */ + +/* Unmounting in a daemon that lurks 'till main process exits */ +int +gf_fuse_unmount_daemon (const char *mountpoint, int fd) +{ + int ret = -1; + pid_t pid = -1; + + if (fd == -1) + return -1; + + int ump[2] = {0,}; + + ret = pipe(ump); + if (ret == -1) { + close (fd); + return -1; + } + + pid = fork (); + switch (pid) { + case 0: + { + char c = 0; + sigset_t sigset; + + close_fds_except (ump, 1); + + setsid(); + (void)chdir("/"); + sigfillset(&sigset); + sigprocmask(SIG_BLOCK, &sigset, NULL); + + read (ump[0], &c, 1); + + gf_fuse_unmount (mountpoint, fd); + exit (0); + } + case -1: + close (fd); + fd = -1; + ret = -1; + close (ump[1]); + } + close (ump[0]); + + return ret; +} + +static char * +escape (char *s) +{ + size_t len = 0; + char *p = NULL; + char *q = NULL; + char *e = NULL; + + for (p = s; *p; p++) { + if (*p == ',') + len++; + len++; + } + + e = CALLOC (1, len + 1); + if (!e) + return NULL; + + for (p = s, q = e; *p; p++, q++) { + if (*p == ',') { + *q = '\\'; + q++; + } + *q = *p; + } + + return e; +} + +static int +fuse_mount_fusermount (const char *mountpoint, char *fsname, + char *mnt_param, int fd) +{ + int pid = -1; + int res = 0; + int ret = -1; + char *fm_mnt_params = NULL; + char *efsname = NULL; + +#ifndef GF_FUSERMOUNT + GFFUSE_LOGERR ("Mounting via helper utility " + "(unprivileged mounting) is supported " + "only if glusterfs is compiled with " + "--enable-fusermount"); + return -1; +#endif + + efsname = escape (fsname); + if (!efsname) { + GFFUSE_LOGERR ("Out of memory"); + + return -1; + } + ret = asprintf (&fm_mnt_params, + "%s,fsname=%s,nonempty,subtype=glusterfs", + mnt_param, efsname); + FREE (efsname); + if (ret == -1) { + GFFUSE_LOGERR ("Out of memory"); + + goto out; + } + + /* fork to exec fusermount */ + pid = fork (); + if (pid == -1) { + GFFUSE_LOGERR ("fork() failed: %s", strerror (errno)); + ret = -1; + goto out; + } + + if (pid == 0) { + char env[10]; + const char *argv[32]; + int a = 0; + + argv[a++] = FUSERMOUNT_PROG; + argv[a++] = "-o"; + argv[a++] = fm_mnt_params; + argv[a++] = "--"; + argv[a++] = mountpoint; + argv[a++] = NULL; + + snprintf (env, sizeof (env), "%i", fd); + setenv (FUSE_DEVFD_ENV, env, 1); + execvp (FUSERMOUNT_PROG, (char **)argv); + GFFUSE_LOGERR ("failed to exec fusermount: %s", + strerror (errno)); + _exit (1); + } + + ret = waitpid (pid, &res, 0); + ret = (ret == pid && res == 0) ? 0 : -1; + out: + FREE (fm_mnt_params); + return ret; +} + +#if defined(__FreeBSD__) +void +build_iovec(struct iovec **iov, int *iovlen, const char *name, void *val, + size_t len) +{ + int i; + if (*iovlen < 0) + return; + i = *iovlen; + + *iov = realloc(*iov, sizeof **iov * (i + 2)); + if (*iov == NULL) { + *iovlen = -1; + return; + } + + (*iov)[i].iov_base = strdup(name); + (*iov)[i].iov_len = strlen(name) + 1; + + i++; + (*iov)[i].iov_base = val; + if (len == (size_t) -1) { + if (val != NULL) + len = strlen(val) + 1; + else + len = 0; + } + (*iov)[i].iov_len = (int)len; + *iovlen = ++i; +} + +/* + * This function is needed for compatibility with parameters + * which used to use the mount_argf() command for the old mount() syscall. + */ +void +build_iovec_argf(struct iovec **iov, int *iovlen, const char *name, + const char *fmt, ...) +{ + va_list ap; + char val[255] = { 0 }; + + va_start(ap, fmt); + vsnprintf(val, sizeof(val), fmt, ap); + va_end(ap); + build_iovec(iov, iovlen, name, strdup(val), (size_t)-1); +} +#endif /* __FreeBSD__ */ + +struct mount_flags { + const char *opt; + mount_flag_t flag; + int on; +} mount_flags[] = { + /* We provide best effort cross platform support for mount flags by + * defining the ones which are commonly used in Unix-like OS-es. + */ + {"ro", MS_RDONLY, 1}, + {"nosuid", MS_NOSUID, 1}, + {"nodev", MS_NODEV, 1}, + {"noatime", MS_NOATIME, 1}, + {"noexec", MS_NOEXEC, 1}, +#ifdef GF_LINUX_HOST_OS + {"rw", MS_RDONLY, 0}, + {"suid", MS_NOSUID, 0}, + {"dev", MS_NODEV, 0}, + {"exec", MS_NOEXEC, 0}, + {"async", MS_SYNCHRONOUS, 0}, + {"sync", MS_SYNCHRONOUS, 1}, + {"atime", MS_NOATIME, 0}, + {"dirsync", MS_DIRSYNC, 1}, +#endif + {NULL, 0, 0} +}; + +static int +mount_param_to_flag (char *mnt_param, mount_flag_t *mntflags, + char **mnt_param_new) +{ + gf_boolean_t found = _gf_false; + struct mount_flags *flag = NULL; + char *param_tok = NULL; + token_iter_t tit = {0,}; + gf_boolean_t iter_end = _gf_false; + + /* Allocate a buffer that will hold the mount parameters remaining + * after the ones corresponding to mount flags are processed and + * removed.The length of the original params are a good upper bound + * of the size needed. + */ + *mnt_param_new = strdup (mnt_param); + if (!*mnt_param_new) + return -1; + + for (param_tok = token_iter_init (*mnt_param_new, ',', &tit) ;;) { + iter_end = next_token (¶m_tok, &tit); + + found = _gf_false; + for (flag = mount_flags; flag->opt; flag++) { + /* Compare the mount flag name to the param + * name at hand. + */ + if (strcmp (flag->opt, param_tok) == 0) { + /* If there is a match, adjust mntflags + * accordingly and break. + */ + if (flag->on) { + *mntflags |= flag->flag; + } else { + *mntflags &= ~flag->flag; + } + found = _gf_true; + break; + } + } + /* Exclude flag names from new parameter list. */ + if (found) + drop_token (param_tok, &tit); + + if (iter_end) + break; + } + + return 0; +} + +static int +fuse_mount_sys (const char *mountpoint, char *fsname, + char *mnt_param, int fd) +{ + int ret = -1; + unsigned mounted = 0; + char *mnt_param_mnt = NULL; + char *fstype = "fuse.glusterfs"; + char *source = fsname; + mount_flag_t mountflags = 0; + char *mnt_param_new = NULL; + + ret = mount_param_to_flag (mnt_param, &mountflags, &mnt_param_new); + if (ret == 0) + ret = asprintf (&mnt_param_mnt, + "%s,fd=%i,rootmode=%o,user_id=%i,group_id=%i", + mnt_param_new, fd, S_IFDIR, getuid (), + getgid ()); + if (ret == -1) { + GFFUSE_LOGERR ("Out of memory"); + + goto out; + } + +#ifdef __FreeBSD__ + struct iovec *iov = NULL; + int iovlen = 0; + char fdstr[15]; + sprintf (fdstr, "%d", fd); + + build_iovec (&iov, &iovlen, "fstype", "fusefs", -1); + build_iovec (&iov, &iovlen, "subtype", "glusterfs", -1); + build_iovec (&iov, &iovlen, "fspath", __DECONST(void *, mountpoint), + -1); + build_iovec (&iov, &iovlen, "from", "/dev/fuse", -1); + build_iovec (&iov, &iovlen, "volname", source, -1); + build_iovec (&iov, &iovlen, "fd", fdstr, -1); + build_iovec (&iov, &iovlen, "allow_other", NULL, -1); + ret = nmount (iov, iovlen, mountflags); +#else + ret = mount (source, mountpoint, fstype, mountflags, + mnt_param_mnt); +#endif /* __FreeBSD__ */ +#ifdef GF_LINUX_HOST_OS + if (ret == -1 && errno == ENODEV) { + /* fs subtype support was added by 79c0b2df aka + v2.6.21-3159-g79c0b2d. Probably we have an + older kernel ... */ + fstype = "fuse"; + ret = asprintf (&source, "glusterfs#%s", fsname); + if (ret == -1) { + GFFUSE_LOGERR ("Out of memory"); + + goto out; + } + ret = mount (source, mountpoint, fstype, mountflags, + mnt_param_mnt); + } +#endif /* GF_LINUX_HOST_OS */ + if (ret == -1) + goto out; + else + mounted = 1; + +#ifdef GF_LINUX_HOST_OS + if (geteuid () == 0) { + char *newmnt = fuse_mnt_resolve_path ("fuse", mountpoint); + char *mnt_param_mtab = NULL; + + if (!newmnt) { + ret = -1; + + goto out; + } + + ret = asprintf (&mnt_param_mtab, "%s%s", + mountflags & MS_RDONLY ? "ro," : "", + mnt_param_new); + if (ret == -1) + GFFUSE_LOGERR ("Out of memory"); + else { + ret = fuse_mnt_add_mount ("fuse", source, newmnt, + fstype, mnt_param_mtab); + FREE (mnt_param_mtab); + } + + FREE (newmnt); + if (ret == -1) { + GFFUSE_LOGERR ("failed to add mtab entry"); + + goto out; + } + } +#endif /* GF_LINUX_HOST_OS */ + +out: + if (ret == -1) { + GFFUSE_LOGERR("ret = -1\n"); + if (mounted) + umount2 (mountpoint, 2); /* lazy umount */ + } + FREE (mnt_param_mnt); + FREE (mnt_param_new); + if (source != fsname) + FREE (source); + + return ret; +} + +int +gf_fuse_mount (const char *mountpoint, char *fsname, + char *mnt_param, pid_t *mnt_pid, int status_fd) +{ + int fd = -1; + pid_t pid = -1; + int ret = -1; + + fd = open ("/dev/fuse", O_RDWR); + if (fd == -1) { + GFFUSE_LOGERR ("cannot open /dev/fuse (%s)", + strerror (errno)); + return -1; + } + + /* start mount agent */ + pid = fork(); + switch (pid) { + case 0: + /* hello it's mount agent */ + if (!mnt_pid) { + /* daemonize mount agent, caller is + * not interested in waiting for it + */ + pid = fork (); + if (pid) + exit (pid == -1 ? 1 : 0); + } + + ret = fuse_mount_sys (mountpoint, fsname, mnt_param, fd); + if (ret == -1) { + gf_log ("glusterfs-fuse", GF_LOG_INFO, + "direct mount failed (%s) errno %d", + strerror (errno), errno); + + if (errno == EPERM) { + gf_log ("glusterfs-fuse", GF_LOG_INFO, + "retry to mount via fusermount"); + + ret = fuse_mount_fusermount (mountpoint, fsname, + mnt_param, fd); + } + } + + if (ret == -1) + GFFUSE_LOGERR ("mount of %s to %s (%s) failed", + fsname, mountpoint, mnt_param); + + if (status_fd >= 0) + (void)write (status_fd, &ret, sizeof (ret)); + exit (!!ret); + /* bye mount agent */ + case -1: + close (fd); + fd = -1; + } + + if (mnt_pid) + *mnt_pid = pid; + + return fd; +} |