user/sven/linux.git/fs, branch leds/HEAD

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-07-12T21:09:36Z

Pull VFS fixes from Al Viro: "Fixes for this cycle regression in overlayfs and a couple of long-standing (== all the way back to 2.6.12, at least) bugs" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: freeing unlinked file indefinitely delayed fix a braino in ovl_d_select_inode() 9p: don't leave a half-initialized inode sitting around

freeing unlinked file indefinitely delayed

2015-07-12T15:27:04Z

Normally opening a file, unlinking it and then closing will have the inode freed upon close() (provided that it's not otherwise busy and has no remaining links, of course). However, there's one case where that does *not* happen. Namely, if you open it by fhandle with cold dcache, then unlink() and close(). In normal case you get d_delete() in unlink(2) notice that dentry is busy and unhash it; on the final dput() it will be forcibly evicted from dcache, triggering iput() and inode removal. In this case, though, we end up with *two* dentries - disconnected (created by open-by-fhandle) and regular one (used by unlink()). The latter will have its reference to inode dropped just fine, but the former will not - it's considered hashed (it is on the ->s_anon list), so it will stay around until the memory pressure will finally do it in. As the result, we have the final iput() delayed indefinitely. It's trivial to reproduce - void flush_dcache(void) { system("mount -o remount,rw /"); } static char buf[20 * 1024 * 1024]; main() { int fd; union { struct file_handle f; char buf[MAX_HANDLE_SZ]; } x; int m; x.f.handle_bytes = sizeof(x); chdir("/root"); mkdir("foo", 0700); fd = open("foo/bar", O_CREAT | O_RDWR, 0600); close(fd); name_to_handle_at(AT_FDCWD, "foo/bar", &x.f, &m, 0); flush_dcache(); fd = open_by_handle_at(AT_FDCWD, &x.f, O_RDWR); unlink("foo/bar"); write(fd, buf, sizeof(buf)); system("df ."); /* 20Mb eaten */ close(fd); system("df ."); /* should've freed those 20Mb */ flush_dcache(); system("df ."); /* should be the same as #2 */ } will spit out something like Filesystem 1K-blocks Used Available Use% Mounted on /dev/root 322023 303843 1131 100% / Filesystem 1K-blocks Used Available Use% Mounted on /dev/root 322023 303843 1131 100% / Filesystem 1K-blocks Used Available Use% Mounted on /dev/root 322023 283282 21692 93% / - inode gets freed only when dentry is finally evicted (here we trigger than by remount; normally it would've happened in response to memory pressure hell knows when). Cc: stable@vger.kernel.org # v2.6.38+; earlier ones need s/kill_it/unhash_it/ Acked-by: J. Bruce Fields Signed-off-by: Al Viro

fix a braino in ovl_d_select_inode()

2015-07-12T15:22:05Z

when opening a directory we want the overlayfs inode, not one from the topmost layer. Reported-By: Andrey Jr. Melnikov Tested-By: Andrey Jr. Melnikov Signed-off-by: Al Viro

9p: don't leave a half-initialized inode sitting around

2015-07-12T15:22:05Z

Cc: stable@vger.kernel.org # all branches Signed-off-by: Al Viro

Merge branch 'for-linus-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs

2015-07-11T17:26:34Z

Pull btrfs fixes from Chris Mason: "This is an assortment of fixes. Most of the commits are from Filipe (fsync, the inode allocation cache and a few others). Mark kicked in a series fixing corners in the extent sharing ioctls, and everyone else fixed up on assorted other problems" * 'for-linus-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: Btrfs: fix wrong check for btrfs_force_chunk_alloc() Btrfs: fix warning of bytes_may_use Btrfs: fix hang when failing to submit bio of directIO Btrfs: fix a comment in inode.c:evict_inode_truncate_pages() Btrfs: fix memory corruption on failure to submit bio for direct IO btrfs: don't update mtime/ctime on deduped inodes btrfs: allow dedupe of same inode btrfs: fix deadlock with extent-same and readpage btrfs: pass unaligned length to btrfs_cmp_data() Btrfs: fix fsync after truncate when no_holes feature is enabled Btrfs: fix fsync xattr loss in the fast fsync path Btrfs: fix fsync data loss after append write Btrfs: fix crash on close_ctree() if cleaner starts new transaction Btrfs: fix race between caching kthread and returning inode to inode cache Btrfs: use kmem_cache_free when freeing entry in inode cache Btrfs: fix race between balance and unused block group deletion btrfs: add error handling for scrub_workers_get() btrfs: cleanup noused initialization of dev in btrfs_end_bio() btrfs: qgroup: allow user to clear the limitation on qgroup

hpfs: hpfs_error: Remove static buffer, use vsprintf extension %pV instead

2015-07-09T20:35:31Z

Removing unnecessary static buffers is good. Use the vsprintf %pV extension instead. Signed-off-by: Joe Perches Signed-off-by: Mikulas Patocka Cc: stable@vger.kernel.org # v2.6.36+ Signed-off-by: Linus Torvalds

hpfs: kstrdup() out of memory handling

2015-07-09T20:35:31Z

There is a possibility of nothing being allocated to the new_opts in case of memory pressure, therefore return ENOMEM for such case. Signed-off-by: Sanidhya Kashyap Signed-off-by: Mikulas Patocka Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds

hpfs: Remove unessary cast

2015-07-09T20:35:31Z

Avoid a pointless kmem_cache_alloc() return value cast in fs/hpfs/super.c::hpfs_alloc_inode() Signed-off-by: Firo Yang Signed-off-by: Mikulas Patocka Signed-off-by: Linus Torvalds

hpfs: add fstrim support

2015-07-09T20:35:30Z

This patch adds support for fstrim to the HPFS filesystem. Signed-off-by: Mikulas Patocka Signed-off-by: Linus Torvalds

ioctl_compat: handle FITRIM

2015-07-09T18:42:21Z

The FITRIM ioctl has the same arguments on 32-bit and 64-bit architectures, so we can add it to the list of compatible ioctls and drop it from compat_ioctl method of various filesystems. Signed-off-by: Mikulas Patocka Cc: Al Viro Cc: Ted Ts'o Signed-off-by: Linus Torvalds