Searched hist:dbf9d7da (Results 1 – 1 of 1) sorted by relevance
/openbmc/linux/fs/ext4/ |
H A D | extents.c | dbf9d7da Mon Jan 28 22:58:27 CST 2008 Dmitry Monakhov <dmonakhov@openvz.org> ext4: fix uniniatilized extent splitting error
Fix bug reported by Dmitry Monakhov caused by lost error code
Testcase:
blksize = 0x1000; fd = open(argv[1], O_RDWR|O_CREAT, 0700); unsigned long long sz = 0x10000000UL; /* allocating big blocks chunk */ syscall(__NR_fallocate, fd, 0, 0UL, sz)
/* grab all other available filesystem space */ tfd = open("tmp", O_RDWR|O_CREAT|O_DIRECT, 0700); while( write(tfd, buf, 4096) > 0); /* loop untill ENOSPC */ fsync(fd); /* just in case */ while (pos < sz) { /* each seek+ write operation result in splits uninitialized extent in three extents. Splitting may result in new extent allocation which probably will fail because of ENOSPC*/
lseek(fd, blksize*2 -1, SEEK_CUR); if ((ret = write(fd, 'a', 1)) != 1) exit(1); pos += blksize * 2; }
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
|