2009/7/20 Edward Tomasz Napierala tr...@freebsd.org:
Author: trasz
Date: Mon Jul 20 19:16:42 2009
New Revision: 195785
URL: http://svn.freebsd.org/changeset/base/195785
Log:
Fix permission handling for extended attributes in ZFS. Without
this change, ZFS uses SunOS Alternate Data Streams semantics - each
EA has its own permissions, which are set at EA creation time
and - unlike SunOS - invisible to the user and impossible to change.
From the user point of view, it's just broken: sometimes access
is granted when it shouldn't be, sometimes it's denied when
it shouldn't be.
This patch makes it behave just like UFS, i.e. depend on current
file permissions. Also, it fixes returned error codes (ENOATTR
instead of ENOENT) and makes listextattr(2) return 0 instead
of EPERM where there is no EA directory (i.e. the file never had
any EA).
I can not create archives from ZFS file system after this commit.
# tar -c -f /dev/null -C /tmp ./
tar: Out of memory: Cannot allocate memory
extattr_list_link(0x8010150a0,0x1,0x0,0x0,0x50f738,0x8e008) =
-1098808089680 (0xff0029ef23b0)
mmap(0x0,703594496,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON,-1,0x0)
ERR#12 'Cannot allocate memory'
tar: write(2,tar: ,5) = 5 (0x5)
Out of memorywrite(2,Out of memory,13) = 13 (0xd)
--
Artis Caune
Everything should be made as simple as possible, but not simpler.
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