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authorVijay Bellur <vijay@gluster.com>2012-05-07 01:06:36 -0700
committerVijay Bellur <vijay@gluster.com>2012-05-07 01:06:36 -0700
commit9189ff9739e0daad3f528da4039155f32ba211ce (patch)
treee7fc62eb15a512f59d609e2d9e67356e1ab4640f
parentc4dadc74fd1d1188f123eae7f2b6d6f5232e2a0f (diff)
Revert "fuse: allow requests during mount (needed for SELinux labels)"v3.3.0qa40
This reverts commit 7d0397c2144810c8a396e00187a6617873c94002.
-rw-r--r--contrib/fuse-include/fuse-mount.h2
-rw-r--r--contrib/fuse-lib/mount.c60
-rw-r--r--xlators/mount/fuse/src/fuse-bridge.c105
-rw-r--r--xlators/mount/fuse/src/fuse-bridge.h5
-rwxr-xr-xxlators/mount/fuse/utils/mount.glusterfs.in55
5 files changed, 40 insertions, 187 deletions
diff --git a/contrib/fuse-include/fuse-mount.h b/contrib/fuse-include/fuse-mount.h
index 7a3756d..9f83faf 100644
--- a/contrib/fuse-include/fuse-mount.h
+++ b/contrib/fuse-include/fuse-mount.h
@@ -9,4 +9,4 @@
void gf_fuse_unmount (const char *mountpoint, int fd);
int gf_fuse_mount (const char *mountpoint, char *fsname, char *mnt_param,
- pid_t *mtab_pid, int status_fd);
+ pid_t *mtab_pid);
diff --git a/contrib/fuse-lib/mount.c b/contrib/fuse-lib/mount.c
index 8c5da3d..800fd19 100644
--- a/contrib/fuse-lib/mount.c
+++ b/contrib/fuse-lib/mount.c
@@ -544,25 +544,19 @@ gf_fuse_unmount (const char *mountpoint, int fd)
#ifndef FUSE_UTIL
static int
-fuse_mount_sys (const char *mountpoint, char *fsname, char *mnt_param, pid_t *mtab_pid, int in_fd, int status_fd)
+fuse_mount_sys (const char *mountpoint, char *fsname, char *mnt_param, pid_t *mtab_pid)
{
int fd = -1, ret = -1;
unsigned mounted = 0;
char *mnt_param_mnt = NULL;
char *fstype = "fuse.glusterfs";
char *source = fsname;
- pid_t mypid = -1;
- if (in_fd >= 0) {
- fd = in_fd;
- }
- else {
- fd = open ("/dev/fuse", O_RDWR);
- if (fd == -1) {
- GFFUSE_LOGERR ("cannot open /dev/fuse (%s)",
- strerror (errno));
- return -1;
- }
+ fd = open ("/dev/fuse", O_RDWR);
+ if (fd == -1) {
+ GFFUSE_LOGERR ("cannot open /dev/fuse (%s)", strerror (errno));
+
+ return -1;
}
ret = asprintf (&mnt_param_mnt,
@@ -573,14 +567,8 @@ fuse_mount_sys (const char *mountpoint, char *fsname, char *mnt_param, pid_t *mt
goto out;
}
- ret = fork();
- if (ret != 0) {
- goto parent_out;
- }
- GFFUSE_LOGERR("calling mount");
ret = mount (source, mountpoint, fstype, 0,
mnt_param_mnt);
- GFFUSE_LOGERR("mount returned %d",ret);
if (ret == -1 && errno == ENODEV) {
/* fs subtype support was added by 79c0b2df aka
v2.6.21-3159-g79c0b2d. Probably we have an
@@ -619,31 +607,11 @@ fuse_mount_sys (const char *mountpoint, char *fsname, char *mnt_param, pid_t *mt
}
}
- ret = 0;
-out:
- if (status_fd >= 0) {
- GFFUSE_LOGERR("writing status");
- (void)write(status_fd,&ret,sizeof(ret));
- mypid = getpid();
- /*
- * This seems awkward, but the alternative would be to add
- * or change return values for functions in multiple layers,
- * just so they can store the value for later retrieval by
- * the code already running in the right context at the other
- * end of this pipe. That's a lot of disruption for nothing.
- */
- (void)write(status_fd,&mypid,sizeof(mypid));
- }
- GFFUSE_LOGERR("Mount child exiting");
- exit(0);
-
-parent_out:
+ out:
if (ret == -1) {
if (mounted)
umount2 (mountpoint, 2); /* lazy umount */
- if (fd != in_fd) {
- close (fd);
- }
+ close (fd);
fd = -1;
}
FREE (mnt_param_mnt);
@@ -683,21 +651,13 @@ escape (char *s)
int
gf_fuse_mount (const char *mountpoint, char *fsname, char *mnt_param,
- pid_t *mtab_pid, int status_fd)
+ pid_t *mtab_pid)
{
int fd = -1, rv = -1;
char *fm_mnt_params = NULL, *p = NULL;
char *efsname = NULL;
- fd = open ("/dev/fuse", O_RDWR);
- if (fd == -1) {
- GFFUSE_LOGERR ("cannot open /dev/fuse (%s)",
- strerror (errno));
- return -1;
- }
-
- fd = fuse_mount_sys (mountpoint, fsname, mnt_param, mtab_pid, fd,
- status_fd);
+ fd = fuse_mount_sys (mountpoint, fsname, mnt_param, mtab_pid);
if (fd == -1) {
gf_log ("glusterfs-fuse", GF_LOG_INFO,
"direct mount failed (%s), "
diff --git a/xlators/mount/fuse/src/fuse-bridge.c b/xlators/mount/fuse/src/fuse-bridge.c
index 0b9ee17..ee3b9f6 100644
--- a/xlators/mount/fuse/src/fuse-bridge.c
+++ b/xlators/mount/fuse/src/fuse-bridge.c
@@ -17,7 +17,6 @@
<http://www.gnu.org/licenses/>.
*/
-#include <sys/wait.h>
#include "fuse-bridge.h"
static int gf_fuse_conn_err_log;
@@ -3876,50 +3875,20 @@ unlock:
return 0;
}
-int
-fuse_get_mount_status (xlator_t *this)
-{
- int kid_status = -1;
- pid_t kid_pid = -1;
- fuse_private_t *priv = this->private;
- int our_status = -1;
-
- if (read(priv->status_pipe[0],&kid_status, sizeof(kid_status)) < 0) {
- gf_log (this->name, GF_LOG_ERROR, "could not get mount status");
- goto out;
- }
- gf_log (this->name, GF_LOG_DEBUG, "mount status is %d", kid_status);
-
- if (read(priv->status_pipe[0],&kid_pid, sizeof(kid_pid)) < 0) {
- gf_log (this->name, GF_LOG_ERROR, "could not get mount PID");
- goto out;
- }
- gf_log (this->name, GF_LOG_DEBUG, "mount PID is %d", kid_pid);
-
- (void)waitpid(kid_pid,NULL,0);
- our_status = kid_status;
-
-out:
- close(priv->status_pipe[0]);
- close(priv->status_pipe[1]);
- return our_status;
-}
static void *
fuse_thread_proc (void *data)
{
- char *mount_point = NULL;
- xlator_t *this = NULL;
- fuse_private_t *priv = NULL;
- ssize_t res = 0;
- struct iobuf *iobuf = NULL;
- fuse_in_header_t *finh;
- struct iovec iov_in[2];
- void *msg = NULL;
- const size_t msg0_size = sizeof (*finh) + 128;
- fuse_handler_t **fuse_ops = NULL;
- struct pollfd pfd[2] = {{0,}};
- gf_boolean_t mount_finished = _gf_false;
+ char *mount_point = NULL;
+ xlator_t *this = NULL;
+ fuse_private_t *priv = NULL;
+ ssize_t res = 0;
+ struct iobuf *iobuf = NULL;
+ fuse_in_header_t *finh;
+ struct iovec iov_in[2];
+ void *msg = NULL;
+ const size_t msg0_size = sizeof (*finh) + 128;
+ fuse_handler_t **fuse_ops = NULL;
this = data;
priv = this->private;
@@ -3936,41 +3905,6 @@ fuse_thread_proc (void *data)
/* THIS has to be reset here */
THIS = this;
- if (!mount_finished) {
- memset(pfd,0,sizeof(pfd));
- pfd[0].fd = priv->status_pipe[0];
- pfd[0].events = POLLIN | POLLHUP | POLLERR;
- pfd[1].fd = priv->fd;
- pfd[1].events = POLLIN | POLLHUP | POLLERR;
- if (poll(pfd,2,-1) < 0) {
- gf_log (this->name, GF_LOG_ERROR,
- "poll error %s", strerror(errno));
- break;
- }
- if (pfd[0].revents & POLLIN) {
- if (fuse_get_mount_status(this) != 0) {
- break;
- }
- mount_finished = _gf_true;
- }
- else if (pfd[0].revents) {
- gf_log (this->name, GF_LOG_ERROR,
- "mount pipe closed without status");
- break;
- }
- if (!pfd[1].revents) {
- continue;
- }
- }
-
- /*
- * We don't want to block on readv while we're still waiting
- * for mount status. That means we only want to get here if
- * mount_status is true (meaning that our wait completed
- * already) or if we already called poll(2) on priv->fd to
- * make sure it's ready.
- */
-
if (priv->init_recvd)
fuse_graph_sync (this);
@@ -4092,11 +4026,8 @@ fuse_thread_proc (void *data)
GF_FREE (iov_in[0].iov_base);
}
- /*
- * We could be in all sorts of states with respect to iobuf and iov_in
- * by the time we get here, and it's just not worth untangling them if
- * we're about to kill ourselves anyway.
- */
+ iobuf_unref (iobuf);
+ GF_FREE (iov_in[0].iov_base);
if (dict_get (this->options, ZR_MOUNTPOINT_OPT))
mount_point = data_to_str (dict_get (this->options,
@@ -4104,10 +4035,11 @@ fuse_thread_proc (void *data)
if (mount_point) {
gf_log (this->name, GF_LOG_INFO,
"unmounting %s", mount_point);
+ dict_del (this->options, ZR_MOUNTPOINT_OPT);
}
- /* Kill the whole process, not just this thread. */
kill (getpid(), SIGTERM);
+
return NULL;
}
@@ -4576,15 +4508,8 @@ init (xlator_t *this_xl)
if (!mnt_args)
goto cleanup_exit;
- if (pipe(priv->status_pipe) < 0) {
- gf_log (this_xl->name, GF_LOG_ERROR,
- "could not create pipe to separate mount process");
- goto cleanup_exit;
- }
-
priv->fd = gf_fuse_mount (priv->mount_point, fsname, mnt_args,
- sync_mtab ? &ctx->mtab_pid : NULL,
- priv->status_pipe[1]);
+ sync_mtab ? &ctx->mtab_pid : NULL);
if (priv->fd == -1)
goto cleanup_exit;
diff --git a/xlators/mount/fuse/src/fuse-bridge.h b/xlators/mount/fuse/src/fuse-bridge.h
index 3711ca5..cdb2ad1 100644
--- a/xlators/mount/fuse/src/fuse-bridge.h
+++ b/xlators/mount/fuse/src/fuse-bridge.h
@@ -66,7 +66,7 @@
#define MAX_FUSE_PROC_DELAY 1
-//#define DISABLE_SELINUX 1
+#define DISABLE_SELINUX 1
typedef struct fuse_in_header fuse_in_header_t;
typedef void (fuse_handler_t) (xlator_t *this, fuse_in_header_t *finh,
@@ -116,9 +116,6 @@ struct fuse_private {
int revchan_in;
int revchan_out;
gf_boolean_t reverse_fuse_thread_started;
-
- /* For communicating with separate mount thread. */
- int status_pipe[2];
};
typedef struct fuse_private fuse_private_t;
diff --git a/xlators/mount/fuse/utils/mount.glusterfs.in b/xlators/mount/fuse/utils/mount.glusterfs.in
index 37cc2f9..3ca09b0 100755
--- a/xlators/mount/fuse/utils/mount.glusterfs.in
+++ b/xlators/mount/fuse/utils/mount.glusterfs.in
@@ -34,36 +34,6 @@ _init ()
UPDATEDBCONF=/etc/updatedb.conf
}
-# Mount happens asynchronously, so the command status alone will never be
-# sufficient. Instead, we have to wait for multiple events representing
-# different possible outcomes.
-wait_for ()
-{
- local daemon_pid=$1
- local mount_point=$2
-
- waited=0
- while true; do
- kill -s 0 $daemon_pid
- if [ $? != 0 ]; then
- echo "Gluster client daemon exited unexpectedly."
- umount $mount_point &> /dev/null
- exit 1
- fi
- inode=$(stat -c %i $mount_point 2>/dev/null);
- if [ "$inode" = "1" ]; then
- break
- fi
- if [ $waited -ge 10 ]; then
- break
- fi
- sleep 1
- waited=$((waited+1))
- done
-
- echo "$inode"
-}
-
start_glusterfs ()
{
if [ -n "$log_level_str" ]; then
@@ -151,33 +121,34 @@ start_glusterfs ()
cmd_line=$(echo "$cmd_line --volfile=$volfile_loc");
fi
- cmd_line=$(echo "$cmd_line $mount_point")
- err=0
- $cmd_line
- daemon_pid=$$
+ cmd_line=$(echo "$cmd_line $mount_point");
+ err=0;
+ $cmd_line;
+
+
+ inode=$(stat -c %i $mount_point 2>/dev/null);
- # Wait for the inode to change *or* for the daemon to exit (indicating a
- # problem with the mount).
- inode=$(wait_for $daemon_pid $mount_point)
# this is required if the stat returns error
if [ -z "$inode" ]; then
- inode="0"
+ inode="0";
fi
# retry the failover
+ # if [ $? != "0" ]; then # <--- TODO: Once glusterfs returns proper error code, change it.
if [ $inode -ne 1 ]; then
+ err=1;
if [ -n "$cmd_line1" ]; then
cmd_line1=$(echo "$cmd_line1 $mount_point");
- $cmd_line1
- daemon_pid=$$
+ $cmd_line1;
+ err=0;
- inode=$(wait_for $daemon_pid $mount_point)
+ inode=$(stat -c %i $mount_point 2>/dev/null);
# this is required if the stat returns error
if [ -z "$inode" ]; then
inode="0";
fi
if [ $inode -ne 1 ]; then
- err=1
+ err=1;
fi
fi
fi