On 8/18/11 4:48 PM, Eric Sandeen wrote:
> Commit 55b23bde19c08f14127a27d461a4e079942c7258,
> xattr: Fix error results for non-existent / invisible attributes
Oh sorry, I see that Christoph already sent a (better) patch like
this, via Andreas...
*shrug* I suppose one or the other should go in ...
Thanks,
-Eric
> changed the error return for getfattr on a link:
>
> Return -ENODATA when trying to read a user.* attribute which cannot
> exist: user space otherwise does not have a reasonable way to
> distinguish between non-existent and inaccessible attributes.
>
> via:
>
> if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) {
> if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
> - return -EPERM;
> + return (mask & MAY_WRITE) ? -EPERM : -ENODATA;
>
>
> So, I propose just filtering both error values to "Failure" as below.
>
> Reported-by: Jeff MOyer <jmoyer@xxxxxxxxxx>
> Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>
> ---
>
> diff --git a/062 b/062
> index a6e4bc8..709f336 100755
> --- a/062
> +++ b/062
> @@ -46,9 +46,12 @@ _cleanup()
> }
> trap "_cleanup; exit \$status" 0 1 2 3 15
>
> +# getfattr can fail in 2 ways depending on kernel version; see
> +# commit 55b23bde19c08f14127a27d461a4e079942c7258 upstream
> getfattr()
> {
> - $GETFATTR_PROG --absolute-names -dh $@ 2>&1 | _filter_scratch
> + $GETFATTR_PROG --absolute-names -dh $@ 2>&1 | _filter_scratch \
> + | sed -e "s/No such attribute\|Operation not permitted/Failure/"
> }
>
> setfattr()
> diff --git a/062.out b/062.out
> index 1d5a094..8377b30 100644
> --- a/062.out
> +++ b/062.out
> @@ -49,7 +49,7 @@ user.name2
> user.name2=0xcafe
>
> *** remove attribute
> -SCRATCH_MNT/reg: user.name2: No such attribute
> +SCRATCH_MNT/reg: user.name2: Failure
> *** final list (strings, type=reg, nsp=user)
> # file: SCRATCH_MNT/reg
> user.name=0xbabe
> @@ -96,7 +96,7 @@ user.name2
> user.name2=0xcafe
>
> *** remove attribute
> -SCRATCH_MNT/dir: user.name2: No such attribute
> +SCRATCH_MNT/dir: user.name2: Failure
> *** final list (strings, type=dir, nsp=user)
> # file: SCRATCH_MNT/dir
> user.name=0xbabe
> @@ -119,13 +119,13 @@ setfattr: SCRATCH_MNT/lnk: Operation not permitted
> setfattr: SCRATCH_MNT/lnk: Operation not permitted
> *** set an empty value for second attribute
> setfattr: SCRATCH_MNT/lnk: Operation not permitted
> -SCRATCH_MNT/lnk: user.name2: Operation not permitted
> +SCRATCH_MNT/lnk: user.name2: Failure
> *** overwrite empty value
> setfattr: SCRATCH_MNT/lnk: Operation not permitted
> -SCRATCH_MNT/lnk: user.name2: Operation not permitted
> +SCRATCH_MNT/lnk: user.name2: Failure
> *** remove attribute
> setfattr: SCRATCH_MNT/lnk: Operation not permitted
> -SCRATCH_MNT/lnk: user.name2: Operation not permitted
> +SCRATCH_MNT/lnk: user.name2: Failure
> *** final list (strings, type=lnk, nsp=user)
>
> === TYPE dev/b; NAMESPACE user
> @@ -144,13 +144,13 @@ setfattr: SCRATCH_MNT/dev/b: Operation not permitted
> setfattr: SCRATCH_MNT/dev/b: Operation not permitted
> *** set an empty value for second attribute
> setfattr: SCRATCH_MNT/dev/b: Operation not permitted
> -SCRATCH_MNT/dev/b: user.name2: Operation not permitted
> +SCRATCH_MNT/dev/b: user.name2: Failure
> *** overwrite empty value
> setfattr: SCRATCH_MNT/dev/b: Operation not permitted
> -SCRATCH_MNT/dev/b: user.name2: Operation not permitted
> +SCRATCH_MNT/dev/b: user.name2: Failure
> *** remove attribute
> setfattr: SCRATCH_MNT/dev/b: Operation not permitted
> -SCRATCH_MNT/dev/b: user.name2: Operation not permitted
> +SCRATCH_MNT/dev/b: user.name2: Failure
> *** final list (strings, type=dev/b, nsp=user)
>
> === TYPE dev/c; NAMESPACE user
> @@ -169,13 +169,13 @@ setfattr: SCRATCH_MNT/dev/c: Operation not permitted
> setfattr: SCRATCH_MNT/dev/c: Operation not permitted
> *** set an empty value for second attribute
> setfattr: SCRATCH_MNT/dev/c: Operation not permitted
> -SCRATCH_MNT/dev/c: user.name2: Operation not permitted
> +SCRATCH_MNT/dev/c: user.name2: Failure
> *** overwrite empty value
> setfattr: SCRATCH_MNT/dev/c: Operation not permitted
> -SCRATCH_MNT/dev/c: user.name2: Operation not permitted
> +SCRATCH_MNT/dev/c: user.name2: Failure
> *** remove attribute
> setfattr: SCRATCH_MNT/dev/c: Operation not permitted
> -SCRATCH_MNT/dev/c: user.name2: Operation not permitted
> +SCRATCH_MNT/dev/c: user.name2: Failure
> *** final list (strings, type=dev/c, nsp=user)
>
> === TYPE dev/p; NAMESPACE user
> @@ -194,13 +194,13 @@ setfattr: SCRATCH_MNT/dev/p: Operation not permitted
> setfattr: SCRATCH_MNT/dev/p: Operation not permitted
> *** set an empty value for second attribute
> setfattr: SCRATCH_MNT/dev/p: Operation not permitted
> -SCRATCH_MNT/dev/p: user.name2: Operation not permitted
> +SCRATCH_MNT/dev/p: user.name2: Failure
> *** overwrite empty value
> setfattr: SCRATCH_MNT/dev/p: Operation not permitted
> -SCRATCH_MNT/dev/p: user.name2: Operation not permitted
> +SCRATCH_MNT/dev/p: user.name2: Failure
> *** remove attribute
> setfattr: SCRATCH_MNT/dev/p: Operation not permitted
> -SCRATCH_MNT/dev/p: user.name2: Operation not permitted
> +SCRATCH_MNT/dev/p: user.name2: Failure
> *** final list (strings, type=dev/p, nsp=user)
>
> === TYPE reg; NAMESPACE trusted
> @@ -243,7 +243,7 @@ trusted.name2
> trusted.name2=0xcafe
>
> *** remove attribute
> -SCRATCH_MNT/reg: trusted.name2: No such attribute
> +SCRATCH_MNT/reg: trusted.name2: Failure
> *** final list (strings, type=reg, nsp=trusted)
> # file: SCRATCH_MNT/reg
> trusted.name=0xbabe
> @@ -292,7 +292,7 @@ trusted.name2
> trusted.name2=0xcafe
>
> *** remove attribute
> -SCRATCH_MNT/dir: trusted.name2: No such attribute
> +SCRATCH_MNT/dir: trusted.name2: Failure
> *** final list (strings, type=dir, nsp=trusted)
> # file: SCRATCH_MNT/dir
> trusted.name=0xbabe
> @@ -341,7 +341,7 @@ trusted.name2
> trusted.name2=0xcafe
>
> *** remove attribute
> -SCRATCH_MNT/lnk: trusted.name2: No such attribute
> +SCRATCH_MNT/lnk: trusted.name2: Failure
> *** final list (strings, type=lnk, nsp=trusted)
> # file: SCRATCH_MNT/lnk
> trusted.name=0xbabe
> @@ -388,7 +388,7 @@ trusted.name2
> trusted.name2=0xcafe
>
> *** remove attribute
> -SCRATCH_MNT/dev/b: trusted.name2: No such attribute
> +SCRATCH_MNT/dev/b: trusted.name2: Failure
> *** final list (strings, type=dev/b, nsp=trusted)
> # file: SCRATCH_MNT/dev/b
> trusted.name=0xbabe
> @@ -435,7 +435,7 @@ trusted.name2
> trusted.name2=0xcafe
>
> *** remove attribute
> -SCRATCH_MNT/dev/c: trusted.name2: No such attribute
> +SCRATCH_MNT/dev/c: trusted.name2: Failure
> *** final list (strings, type=dev/c, nsp=trusted)
> # file: SCRATCH_MNT/dev/c
> trusted.name=0xbabe
> @@ -482,7 +482,7 @@ trusted.name2
> trusted.name2=0xcafe
>
> *** remove attribute
> -SCRATCH_MNT/dev/p: trusted.name2: No such attribute
> +SCRATCH_MNT/dev/p: trusted.name2: Failure
> *** final list (strings, type=dev/p, nsp=trusted)
> # file: SCRATCH_MNT/dev/p
> trusted.name=0xbabe
>
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