Re: sparse file check failed

bug-coreutils

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Re: sparse file check failed

From:	John T. Rose
Subject:	Re: sparse file check failed
Date:	Wed, 06 Dec 2006 09:58:59 CST

  In message <address@hidden>, 
  Paul Eggert writes:
  > "John T. Rose" <address@hidden> writes:
  > 
  > > + dd bs=1 seek=131073 of=sparse
  > > + cp --sparse=always sparse copy
  > 
  > Thanks for reporting this.
  > What kind of file system are you writing to?

/dev/hda1 on /usr/mnt.rom/cf type ext2 (rw)

  > If you execute the following shell commands:
  > 
  >   rm sparse
  >   dd bs=1 seek=131073 of=sparse
  >   strace -o tr cp --sparse=always sparse copy
  > 
  > what are the last few system calls (in the file 'tr')?  It'd be nice
  > to see the pattern, so that we can know what actually failed.

# ../src/dd bs=1 seek=131073 of=sparse < /dev/null
0+0 records in
0+0 records out
0 bytes (0 B) copied, 0.726926 s, 0.0 kB/s
# ll
total 0
-rw-r--r-- 1 root root 131073 Dec  6 09:41 sparse
# du -sh *
0       sparse
# strace -o tr ../src/cp --sparse=always sparse copy
../src/cp: writing `copy': Invalid argument
# ll
total 12
-rw-r--r-- 1 root root      0 Dec  6 09:43 copy
-rw-r--r-- 1 root root 131073 Dec  6 09:41 sparse
-rw-r--r-- 1 root root   8207 Dec  6 09:43 tr

Here is the tail part of the trace ...

open("sparse", O_RDONLY|O_LARGEFILE)    = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=131073, ...}) = 0
open("copy", O_WRONLY|O_CREAT|O_LARGEFILE, 0644) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
brk(0x2019000)                          = 0x2019000
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [4096], SEEK_CUR)      = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [8192], SEEK_CUR)      = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [12288], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [16384], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [20480], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [24576], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [28672], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [32768], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [36864], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [40960], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [45056], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [49152], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [53248], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [57344], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [61440], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [65536], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [69632], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [73728], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [77824], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [81920], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [86016], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [90112], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [94208], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [98304], SEEK_CUR)     = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [102400], SEEK_CUR)    = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [106496], SEEK_CUR)    = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [110592], SEEK_CUR)    = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [114688], SEEK_CUR)    = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [118784], SEEK_CUR)    = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [122880], SEEK_CUR)    = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [126976], SEEK_CUR)    = 0
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 
4096
_llseek(4, 4096, [131072], SEEK_CUR)    = 0
read(3, "\0", 4096)                     = 1
_llseek(4, 1, [131073], SEEK_CUR)       = 0
read(3, "", 4096)                       = 0
ftruncate64(4, 13834516064769277953)    = -1 EINVAL (Invalid argument)
write(2, "../src/cp: ", 11)             = 11
write(2, "writing `copy\'", 14)         = 14
write(2, ": Invalid argument", 18)      = 18
write(2, "\n", 1)                       = 1

hrm, crazy offset to ftruncate64?!

John
--
John T. Rose                         Information Technology Services
address@hidden                     Academic Systems Group
Systems Analyst                      237 Durham Center
<A HREF="http://rose.public.iastate.edu/";>John T. Rose</A>

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sparse file check failed, John T. Rose, 2006/12/06
- Re: sparse file check failed, Paul Eggert, 2006/12/06
  - Re: sparse file check failed, John T. Rose <=
    - Re: sparse file check failed, Jim Meyering, 2006/12/06
- Re: sparse file check failed, Jim Meyering, 2006/12/08
  - Re: sparse file check failed, Paul Eggert, 2006/12/08

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