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author | Dmitry Monakhov <dmonakhov@openvz.org> | 2008-01-28 23:58:27 -0500 |
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committer | Theodore Ts'o <tytso@mit.edu> | 2008-01-28 23:58:27 -0500 |
commit | dbf9d7da33f79302fb1e4d7c6b2f6598e8608e72 (patch) | |
tree | 0065fa9b23765b42aed171cc3e070aabb655d9de /fs/jfs/jfs_txnmgr.c | |
parent | ce40733ce93de402ed629762f0e912d9af187cef (diff) |
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>
Diffstat (limited to 'fs/jfs/jfs_txnmgr.c')
0 files changed, 0 insertions, 0 deletions