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* Get rid of indirect include of fs_struct.hAl Viro2009-04-011-0/+1
| | | | | | | | Don't pull it in sched.h; very few files actually need it and those can include directly. sched.h itself only needs forward declaration of struct fs_struct; Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* New helper - current_umask()Al Viro2009-04-011-3/+3
| | | | | | | current->fs->umask is what most of fs_struct users are doing. Put that into a helper function. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Take fs_struct handling to new file (fs/fs_struct.c)Al Viro2009-04-011-7/+0
| | | | | | | | | | Pure code move; two new helper functions for nfsd and daemonize (unshare_fs_struct() and daemonize_fs_struct() resp.; for now - the same code as used to be in callers). unshare_fs_struct() exported (for nfsd, as copy_fs_struct()/exit_fs() used to be), copy_fs_struct() and exit_fs() don't need exports anymore. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge branch 'for-linus' of ↵Linus Torvalds2009-03-281-14/+12
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (37 commits) fs: avoid I_NEW inodes Merge code for single and multiple-instance mounts Remove get_init_pts_sb() Move common mknod_ptmx() calls into caller Parse mount options just once and copy them to super block Unroll essentials of do_remount_sb() into devpts vfs: simple_set_mnt() should return void fs: move bdev code out of buffer.c constify dentry_operations: rest constify dentry_operations: configfs constify dentry_operations: sysfs constify dentry_operations: JFS constify dentry_operations: OCFS2 constify dentry_operations: GFS2 constify dentry_operations: FAT constify dentry_operations: FUSE constify dentry_operations: procfs constify dentry_operations: ecryptfs constify dentry_operations: CIFS constify dentry_operations: AFS ...
| * cleanup may_openChristoph Hellwig2009-03-271-14/+12
| | | | | | | | | | | | | | | | | | Add a switch for the various i_mode fmt cases, and remove the comment about writeability of devices nodes - that part is handled in inode_permission and comment on (briefly) there. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | Merge branch 'for_linus' of ↵Linus Torvalds2009-03-271-11/+11
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-quota-2.6 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-quota-2.6: (27 commits) ext2: Zero our b_size in ext2_quota_read() trivial: fix typos/grammar errors in fs/Kconfig quota: Coding style fixes quota: Remove superfluous inlines quota: Remove uppercase aliases for quota functions. nfsd: Use lowercase names of quota functions jfs: Use lowercase names of quota functions udf: Use lowercase names of quota functions ufs: Use lowercase names of quota functions reiserfs: Use lowercase names of quota functions ext4: Use lowercase names of quota functions ext3: Use lowercase names of quota functions ext2: Use lowercase names of quota functions ramfs: Remove quota call vfs: Use lowercase names of quota functions quota: Remove dqbuf_t and other cleanups quota: Remove NODQUOT macro quota: Make global quota locks cacheline aligned quota: Move quota files into separate directory ext4: quota reservation for delayed allocation ...
| * | vfs: Use lowercase names of quota functionsJan Kara2009-03-261-11/+11
| |/ | | | | | | | | | | | | Use lowercase names of quota functions instead of old uppercase ones. Signed-off-by: Jan Kara <jack@suse.cz> CC: Alexander Viro <viro@zeniv.linux.org.uk>
* | Merge branch 'master' into nextJames Morris2009-02-061-82/+115
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: fs/namei.c Manually merged per: diff --cc fs/namei.c index 734f2b5,bbc15c2..0000000 --- a/fs/namei.c +++ b/fs/namei.c @@@ -860,9 -848,8 +849,10 @@@ static int __link_path_walk(const char nd->flags |= LOOKUP_CONTINUE; err = exec_permission_lite(inode); if (err == -EAGAIN) - err = vfs_permission(nd, MAY_EXEC); + err = inode_permission(nd->path.dentry->d_inode, + MAY_EXEC); + if (!err) + err = ima_path_check(&nd->path, MAY_EXEC); if (err) break; @@@ -1525,14 -1506,9 +1509,14 @@@ int may_open(struct path *path, int acc flag &= ~O_TRUNC; } - error = vfs_permission(nd, acc_mode); + error = inode_permission(inode, acc_mode); if (error) return error; + - error = ima_path_check(&nd->path, ++ error = ima_path_check(path, + acc_mode & (MAY_READ | MAY_WRITE | MAY_EXEC)); + if (error) + return error; /* * An append-only file must be opened in append mode for writing. */ Signed-off-by: James Morris <jmorris@namei.org>
| * [CVE-2009-0029] System call wrappers part 29Heiko Carstens2009-01-141-11/+10
| | | | | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
| * [CVE-2009-0029] System call wrappers part 20Heiko Carstens2009-01-141-2/+2
| | | | | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
| * [CVE-2009-0029] System call wrappers part 15Heiko Carstens2009-01-141-1/+1
| | | | | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
| * [CVE-2009-0029] System call wrappers part 14Heiko Carstens2009-01-141-4/+4
| | | | | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
| * Merge branch 'for-linus' of ↵Linus Torvalds2009-01-061-19/+13
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: inotify: fix type errors in interfaces fix breakage in reiserfs_new_inode() fix the treatment of jfs special inodes vfs: remove duplicate code in get_fs_type() add a vfs_fsync helper sys_execve and sys_uselib do not call into fsnotify zero i_uid/i_gid on inode allocation inode->i_op is never NULL ntfs: don't NULL i_op isofs check for NULL ->i_op in root directory is dead code affs: do not zero ->i_op kill suid bit only for regular files vfs: lseek(fd, 0, SEEK_CUR) race condition
| | * inode->i_op is never NULLAl Viro2009-01-051-19/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We used to have rather schizophrenic set of checks for NULL ->i_op even though it had been eliminated years ago. You'd need to go out of your way to set it to NULL explicitly _and_ a bunch of code would die on such inodes anyway. After killing two remaining places that still did that bogosity, all that crap can go away. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | fs: symlink write_begin allocation context fixNick Piggin2009-01-041-4/+9
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With the write_begin/write_end aops, page_symlink was broken because it could no longer pass a GFP_NOFS type mask into the point where the allocations happened. They are done in write_begin, which would always assume that the filesystem can be entered from reclaim. This bug could cause filesystem deadlocks. The funny thing with having a gfp_t mask there is that it doesn't really allow the caller to arbitrarily tinker with the context in which it can be called. It couldn't ever be GFP_ATOMIC, for example, because it needs to take the page lock. The only thing any callers care about is __GFP_FS anyway, so turn that into a single flag. Add a new flag for write_begin, AOP_FLAG_NOFS. Filesystems can now act on this flag in their write_begin function. Change __grab_cache_page to accept a nofs argument as well, to honour that flag (while we're there, change the name to grab_cache_page_write_begin which is more instructive and does away with random leading underscores). This is really a more flexible way to go in the end anyway -- if a filesystem happens to want any extra allocations aside from the pagecache ones in ints write_begin function, it may now use GFP_KERNEL (rather than GFP_NOFS) for common case allocations (eg. ocfs2_alloc_write_ctxt, for a random example). [kosaki.motohiro@jp.fujitsu.com: fix ubifs] [kosaki.motohiro@jp.fujitsu.com: fix fuse] Signed-off-by: Nick Piggin <npiggin@suse.de> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: <stable@kernel.org> [2.6.28.x] Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> [ Cleaned up the calling convention: just pass in the AOP flags untouched to the grab_cache_page_write_begin() function. That just simplifies everybody, and may even allow future expansion of the logic. - Linus ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * make INIT_FS use the __RW_LOCK_UNLOCKED initializationSteven Rostedt2009-01-011-1/+1
| | | | | | | | | | | | | | | | | | [AV: rediffed on top of unification of init_fs] Initialization of init_fs still uses the deprecated RW_LOCK_UNLOCKED macro. This patch updates it to use the __RW_LOCK_UNLOCKED(lock) macro. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * take init_fs to saner placeAl Viro2009-01-011-0/+7
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * kill vfs_permissionChristoph Hellwig2009-01-011-18/+13
| | | | | | | | | | | | | | | | | | | | | | | | With all the nameidata removal there's no point anymore for this helper. Of the three callers left two will go away with the next lookup series anyway. Also add proper kerneldoc to inode_permission as this is the main permission check routine now. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * pass a struct path * to may_openChristoph Hellwig2009-01-011-7/+7
| | | | | | | | | | | | | | No need for the nameidata in may_open - a struct path is enough. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * kill walk_init_rootChristoph Hellwig2009-01-011-13/+8
| | | | | | | | | | | | | | | | walk_init_root is a tiny helper that is marked __always_inline, has just one caller and an unused argument. Just merge it into the caller. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * remove incorrect comment in inode_permissionChristoph Hellwig2009-01-011-1/+0
| | | | | | | | | | | | | | | | We now pass on all MAY_ flags to the filesystems permission routines, so remove the comment stating the contrary. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * vfs: ensure page symlinks are NUL-terminatedDuane Griffin2009-01-011-2/+5
| | | | | | | | | | | | | | | | | | | | | | | | On-disk data corruption could cause a page link to have its i_size set to PAGE_SIZE (or a multiple thereof) and its contents all non-NUL. NUL-terminate the link name to ensure this doesn't cause further problems for the kernel. Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Duane Griffin <duaneg@dghda.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * introduce new LSM hooks where vfsmount is available.Kentaro Takeda2009-01-011-0/+36
| | | | | | | | | | | | | | | | | | | | Add new LSM hooks for path-based checks. Call them on directory-modifying operations at the points where we still know the vfsmount involved. Signed-off-by: Kentaro Takeda <takedakn@nttdata.co.jp> Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: Toshiharu Harada <haradats@nttdata.co.jp> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | integrity: IMA hooksMimi Zohar2009-02-051-0/+8
|/ | | | | | | | | | This patch replaces the generic integrity hooks, for which IMA registered itself, with IMA integrity hooks in the appropriate places directly in the fs directory. Signed-off-by: Mimi Zohar <zohar@us.ibm.com> Acked-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: James Morris <jmorris@namei.org>
* Merge branch 'master' into nextJames Morris2008-12-041-1/+1
|\ | | | | | | | | | | | | | | | | | | Conflicts: fs/nfsd/nfs4recover.c Manually fixed above to use new creds API functions, e.g. nfs4_save_creds(). Signed-off-by: James Morris <jmorris@namei.org>
| * don't unlink an active swapfileHugh Dickins2008-11-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Peter Cordes is sorry that he rm'ed his swapfiles while they were in use, he then had no pathname to swapoff. It's a curious little oversight, but not one worth a lot of hackery. Kudos to Willy Tarreau for turning this around from a discussion of synthetic pathnames to how to prevent unlink. Mimic immutable: prohibit unlinking an active swapfile in may_delete() (and don't worry my little head over the tiny race window). Signed-off-by: Hugh Dickins <hugh@veritas.com> Cc: Willy Tarreau <w@1wt.eu> Acked-by: Christoph Hellwig <hch@infradead.org> Cc: Peter Cordes <peter@cordes.ca> Cc: Bodo Eggert <7eggert@gmx.de> Cc: David Newall <davidn@davidnewall.com> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | CRED: Wrap task credential accesses in the filesystem subsystemDavid Howells2008-11-141-4/+6
|/ | | | | | | | | | | | | | | | | Wrap access to task credentials so that they can be separated more easily from the task_struct during the introduction of COW creds. Change most current->(|e|s|fs)[ug]id to current_(|e|s|fs)[ug]id(). Change some task->e?[ug]id to task_e?[ug]id(). In some places it makes more sense to use RCU directly rather than a convenient wrapper; these will be addressed by later patches. Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: James Morris <jmorris@namei.org> Acked-by: Serge Hallyn <serue@us.ibm.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: James Morris <jmorris@namei.org>
* [PATCH] move executable checking into ->permission()Miklos Szeredi2008-10-231-17/+4
| | | | | | | | | | | | | | | | | | | | | | | | | For execute permission on a regular files we need to check if file has any execute bits at all, regardless of capabilites. This check is normally performed by generic_permission() but was also added to the case when the filesystem defines its own ->permission() method. In the latter case the filesystem should be responsible for performing this check. Move the check from inode_permission() inside filesystems which are not calling generic_permission(). Create a helper function execute_ok() that returns true if the inode is a directory or if any execute bits are present in i_mode. Also fix up the following code: - coda control file is never executable - sysctl files are never executable - hfs_permission seems broken on MAY_EXEC, remove - hfsplus_permission is eqivalent to generic_permission(), remove Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
* [PATCH vfs-2.6 6/6] vfs: add LOOKUP_RENAME_TARGET intentOGAWA Hirofumi2008-10-231-0/+1
| | | | | | | | | | | This adds LOOKUP_RENAME_TARGET intent for lookup of rename destination. LOOKUP_RENAME_TARGET is going to be used like LOOKUP_CREATE. But since the destination of rename() can be existing directory entry, so it has a difference. Although that difference doesn't matter in my usage, this tells it to user of this intent. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
* [PATCH vfs-2.6 5/6] vfs: remove LOOKUP_PARENT from non LOOKUP_PARENT lookupOGAWA Hirofumi2008-10-231-9/+18
| | | | | | | | | | lookup_hash() with LOOKUP_PARENT is bogus. And this prepares to add new intent on those path. The user of LOOKUP_PARENT intent is nfs only, and it checks whether nd->flags has LOOKUP_CREATE or LOOKUP_OPEN, so the result is same. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
* [PATCH vfs-2.6 2/6] vfs: add d_ancestor()OGAWA Hirofumi2008-10-231-12/+10
| | | | | | | | | | This adds d_ancestor() instead of d_isparent(), then use it. If new_dentry == old_dentry, is_subdir() returns 1, looks strange. "new_dentry == old_dentry" is not subdir obviously. But I'm not checking callers for now, so this keeps current behavior. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
* [PATCH vfs-2.6 1/6] vfs: replace parent == dentry->d_parent by IS_ROOT()OGAWA Hirofumi2008-10-231-2/+2
| | | | Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
* [PATCH] make O_EXCL in nd->intent.flags visible in nd->flagsAl Viro2008-10-231-1/+3
| | | | | | | New flag: LOOKUP_EXCL. Set before doing the final step of pathname resolution on the paths that have LOOKUP_CREATE and O_EXCL. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [PATCH] get rid of path_lookup_create()Al Viro2008-10-231-39/+22
| | | | | | | | ... and don't pass bogus flags when we are just looking for parent. Fold __path_lookup_intent_open() into path_lookup_open() while we are at it; that's the only remaining caller. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [PATCH] new helper - kern_path()Al Viro2008-10-231-0/+10
| | | | | | Analog of lookup_path(), takes struct path *. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [patch 3/4] vfs: remove unused nameidata argument of may_create()Miklos Szeredi2008-08-011-8/+7
| | | | | Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Re: BUG at security/selinux/avc.c:883 (was: Re: linux-next: TreeStephen Smalley2008-08-011-1/+1
| | | | | | | | | | | | | for July 17: early crash on x86-64) SELinux needs MAY_APPEND to be passed down to the security hook. Otherwise, we get permission denials when only append permission is granted by policy even if the opening process specified O_APPEND. Shows up as a regression in the ltp selinux testsuite, fixed by this patch. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [PATCH] get rid of __user_path_lookup_openAl Viro2008-07-271-13/+0
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [PATCH] new (local) helper: user_path_parent()Al Viro2008-07-271-80/+57
| | | | | | | Preparation to untangling intents mess: reduce the number of do_path_lookup() callers. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [PATCH] sanitize __user_walk_fd() et.al.Al Viro2008-07-271-18/+18
| | | | | | | | | | | | | * do not pass nameidata; struct path is all the callers want. * switch to new helpers: user_path_at(dfd, pathname, flags, &path) user_path(pathname, &path) user_lpath(pathname, &path) user_path_dir(pathname, &path) (fail if not a directory) The last 3 are trivial macro wrappers for the first one. * remove nameidata in callers. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [PATCH] kill nameidata passing to permission(), rename to inode_permission()Al Viro2008-07-271-13/+9
| | | | | | | Incidentally, the name that gives hundreds of false positives on grep is not a good idea... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [PATCH] take noexec checks to very few callers that careAl Viro2008-07-271-9/+0
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [PATCH] more nameidata removal: exec_permission_lite() doesn't need itAl Viro2008-07-271-3/+2
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [PATCH] pass MAY_OPEN to vfs_permission() explicitlyAl Viro2008-07-271-9/+4
| | | | | | | ... and get rid of the last "let's deduce mask from nameidata->flags" bit. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [PATCH] fix MAY_CHDIR/MAY_ACCESS/LOOKUP_ACCESS messAl Viro2008-07-271-2/+0
| | | | | | | | | | | * MAY_CHDIR is redundant - it's an equivalent of MAY_ACCESS * MAY_ACCESS on fuse should affect only the last step of pathname resolution * fchdir() and chroot() should pass MAY_ACCESS, for the same reason why chdir() needs that. * now that we pass MAY_ACCESS explicitly in all cases, LOOKUP_ACCESS can be removed; it has no business being in nameidata. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [PATCH] kill altrootAl Viro2008-07-271-87/+2
| | | | | | long overdue... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [PATCH] permission checks for chdir need special treatment only on the last stepAl Viro2008-07-271-2/+0
| | | | | | | | ... so we ought to pass MAY_CHDIR to vfs_permission() instead of having it triggered on every step of preceding pathname resolution. LOOKUP_CHDIR is killed by that. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [patch 5/5] vfs: remove mode parameter from vfs_symlink()Miklos Szeredi2008-07-271-2/+2
| | | | | | | | | Remove the unused mode parameter from vfs_symlink and callers. Thanks to Tetsuo Handa for noticing. CC: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
* [patch 4/5] vfs: reuse local variable in vfs_link()Tetsuo Handa2008-07-271-4/+4
| | | | | | | | | | | Why not reuse "inode" which is assigned as struct inode *inode = old_dentry->d_inode; in the beginning of vfs_link() ? Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
* [PATCH] sanitize ->permission() prototypeAl Viro2008-07-271-6/+17
| | | | | | | | | | | | | | | * kill nameidata * argument; map the 3 bits in ->flags anybody cares about to new MAY_... ones and pass with the mask. * kill redundant gfs2_iop_permission() * sanitize ecryptfs_permission() * fix remaining places where ->permission() instances might barf on new MAY_... found in mask. The obvious next target in that direction is permission(9) folded fix for nfs_permission() breakage from Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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