friendly ping.. 在 2022/1/4 22:23, zhanchengbin 写道:
Resize2fs disk hardlinks which mounting after the same name as tmpfs filesystem it will be error. The items in /proc/mounts are traversed, when you get to tmpfs,file!=mnt->mnt_fsname, therefore, the stat(mnt->mnt_fsname, &st_buf) branch is used, however, the values of file_rdev and st_buf.st_rdev are the same. As a result, the system mistakenly considers that disk is mounted to /root/tmp. As a result , resize2fs fails. example: dev_name="/dev/sdc" (ps: a disk in you self) mkdir /root/tmp mkdir /root/mnt mkfs.ext4 -F -b 1024 -E "resize=10000000" "${dev_name}" 32768 mount -t tmpfs "${dev_name}" /root/tmp mount "${dev_name}" /root/mnt ln "${dev_name}" "${dev_name}"-ln resize2fs "${dev_name}"-ln 6G Signed-off-by: zhanchengbin <zhanchengbin1@xxxxxxxxxx> Signed-off-by: Zhiqiang Liu <liuzhiqiang26@xxxxxxxxxx> --- lib/ext2fs/ismounted.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/lib/ext2fs/ismounted.c b/lib/ext2fs/ismounted.c index aee7d726..463a82a6 100644 --- a/lib/ext2fs/ismounted.c +++ b/lib/ext2fs/ismounted.c@@ -98,6 +98,7 @@ static errcode_t check_mntent_file(const char *mtab_file, const char *file,{ struct mntent *mnt; struct stat st_buf; + struct stat dir_st_buf; errcode_t retval = 0; dev_t file_dev=0, file_rdev=0; ino_t file_ino=0;@@ -144,8 +145,12 @@ static errcode_t check_mntent_file(const char *mtab_file, const char *file,if (stat(mnt->mnt_fsname, &st_buf) == 0) { if (ext2fsP_is_disk_device(st_buf.st_mode)) { #ifndef __GNU__ - if (file_rdev && (file_rdev == st_buf.st_rdev)) - break; + if (file_rdev && (file_rdev == st_buf.st_rdev)) { + if (stat(mnt->mnt_dir, &dir_st_buf) != 0) + continue; + if (file_rdev == dir_st_buf.st_dev) + break; + } if (check_loop_mounted(mnt->mnt_fsname, st_buf.st_rdev, file_dev, file_ino) == 1)
