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udev: ignore error caused by device disconnection 

During an add or change event, the device may be disconnected.

Fixes #13976.
This commit is contained in:
Yu Watanabe 2019-11-12 14:58:25 +09:00
parent ffdc9c891f
commit b64b83d13e
1 changed files with 15 additions and 8 deletions
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23
src/udev/udev-node.c
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@ -296,8 +296,11 @@ static int node_permissions_apply(sd_device *dev, bool apply_mac,
else
mode |= S_IFCHR;
if (lstat(devnode, &stats) < 0)
if (lstat(devnode, &stats) < 0) {
if (errno == ENOENT)
return 0; /* this is necessarily racey, so ignore missing the device */
return log_device_debug_errno(dev, errno, "cannot stat() node %s: %m", devnode);
}
if ((mode != MODE_INVALID && (stats.st_mode & S_IFMT) != (mode & S_IFMT)) || stats.st_rdev != devnum)
return log_device_debug_errno(dev, SYNTHETIC_ERRNO(EEXIST),
@ -322,11 +325,13 @@ static int node_permissions_apply(sd_device *dev, bool apply_mac,
r = chmod_and_chown(devnode, mode, uid, gid);
if (r < 0)
log_device_warning_errno(dev, r, "Failed to set owner/mode of %s to uid=" UID_FMT ", gid=" GID_FMT ", mode=%#o: %m",
devnode,
uid_is_valid(uid) ? uid : stats.st_uid,
gid_is_valid(gid) ? gid : stats.st_gid,
mode != MODE_INVALID ? mode & 0777 : stats.st_mode & 0777);
log_device_full(dev, r == -ENOENT ? LOG_DEBUG : LOG_ERR, r,
"Failed to set owner/mode of %s to uid=" UID_FMT
", gid=" GID_FMT ", mode=%#o: %m",
devnode,
uid_is_valid(uid) ? uid : stats.st_uid,
gid_is_valid(gid) ? gid : stats.st_gid,
mode != MODE_INVALID ? mode & 0777 : stats.st_mode & 0777);
} else
log_device_debug(dev, "Preserve permissions of %s, uid=" UID_FMT ", gid=" GID_FMT ", mode=%#o",
devnode,
@ -343,7 +348,8 @@ static int node_permissions_apply(sd_device *dev, bool apply_mac,
q = mac_selinux_apply(devnode, label);
if (q < 0)
log_device_error_errno(dev, q, "SECLABEL: failed to set SELinux label '%s': %m", label);
log_device_full(dev, q == -ENOENT ? LOG_DEBUG : LOG_ERR, q,
"SECLABEL: failed to set SELinux label '%s': %m", label);
else
log_device_debug(dev, "SECLABEL: set SELinux label '%s'", label);
@ -352,7 +358,8 @@ static int node_permissions_apply(sd_device *dev, bool apply_mac,
q = mac_smack_apply(devnode, SMACK_ATTR_ACCESS, label);
if (q < 0)
log_device_error_errno(dev, q, "SECLABEL: failed to set SMACK label '%s': %m", label);
log_device_full(dev, q == -ENOENT ? LOG_DEBUG : LOG_ERR, q,
"SECLABEL: failed to set SMACK label '%s': %m", label);
else
log_device_debug(dev, "SECLABEL: set SMACK label '%s'", label);