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2012-06-01fs: introduce inode operation ->update_timeJosef Bacik7-26/+64
Btrfs has to make sure we have space to allocate new blocks in order to modify the inode, so updating time can fail. We've gotten around this by having our own file_update_time but this is kind of a pain, and Christoph has indicated he would like to make xfs do something different with atime updates. So introduce ->update_time, where we will deal with i_version an a/m/c time updates and indicate which changes need to be made. The normal version just does what it has always done, updates the time and marks the inode dirty, and then filesystems can choose to do something different. I've gone through all of the users of file_update_time and made them check for errors with the exception of the fault code since it's complicated and I wasn't quite sure what to do there, also Jan is going to be pushing the file time updates into page_mkwrite for those who have it so that should satisfy btrfs and make it not a big deal to check the file_update_time() return code in the generic fault path. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com>
2012-06-01reiserfs: get rid of resierfs_sync_superArtem Bityutskiy3-11/+55
This patch stops reiserfs using the VFS 'write_super()' method along with the s_dirt flag, because they are on their way out. The whole "superblock write-out" VFS infrastructure is served by the 'sync_supers()' kernel thread, which wakes up every 5 (by default) seconds and writes out all dirty superblock using the '->write_super()' call-back. But the problem with this thread is that it wastes power by waking up the system every 5 seconds, even if there are no diry superblocks, or there are no client file-systems which would need this (e.g., btrfs does not use '->write_super()'). So we want to kill it completely and thus, we need to make file-systems to stop using the '->write_super()' VFS service, and then remove it together with the kernel thread. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-06-01reiserfs: mark the superblock as dirty a bit laterArtem Bityutskiy1-2/+1
The 'journal_mark_dirty()' function currently first marks the superblock as dirty by setting 's_dirt' to 1, then does various sanity checks and returns, then actuall does all the magic with the journal. This is not an ideal order, though. It makes more sense to first do all the checks, then do all the internal stuff, and at the end notify the VFS that the superblock is now dirty. This patch moves the 's_dirt = 1' assignment from the very beginning of this function to the very end. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-06-01reiserfs: remove useless superblock dirtyingArtem Bityutskiy1-1/+0
The 'reiserfs_resize()' function marks the superblock as dirty by assigning 1 to 's_dirt' and then calls 'journal_mark_dirty()' which does the same. Thus, we can remove the assignment from 'reiserfs_resize()'. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-06-01reiserfs: clean-up function return typeArtem Bityutskiy2-6/+4
Turn 'reiserfs_flush_old_commits()' into a void function because the callers do not cares about what it returns anyway. We are going to remove the 'sb->s_dirt' field completely and this patch is a small step towards this direction. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-06-01reiserfs: cleanup reiserfs_fill_super a bitArtem Bityutskiy1-10/+10
We have the reiserfs superblock pointer in the 'sbi' variable in this function, no need to use the 'REISERFS_SB(s)' macro which is the same. This is jut a small clean-up. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-06-01switch aio and shm to do_mmap_pgoff(), make do_mmap() staticAl Viro1-3/+3
after all, 0 bytes and 0 pages is the same thing... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-31split ->file_mmap() into ->mmap_addr()/->mmap_file()Al Viro1-4/+0
... i.e. file-dependent and address-dependent checks. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-31binfmt_flat: use vm_munmap, we are missing ->mmap_sem thereAl Viro1-4/+4
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-31binfmt_elf: switch elf_map() to vm_mmap/vm_munmapAl Viro1-5/+3
No reason to hold ->mmap_sem over the sequence Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-31vfs: umount_tree() might be called on subtree that had never made itAl Viro1-1/+2
__mnt_make_shortterm() in there undoes the effect of __mnt_make_longterm() we'd done back when we set ->mnt_ns non-NULL; it should not be done to vfsmounts that had never gone through commit_tree() and friends. Kudos to lczerner for catching that one... Cc: stable@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-31pipe: return -ENOIOCTLCMD instead of -EINVAL on unknown ioctl commandWill Deacon1-1/+1
As described in commit 07d106d0a ("vfs: fix up ENOIOCTLCMD error handling"), drivers should return -ENOIOCTLCMD if they receive an ioctl command which they don't understand. Doing so will result in -ENOTTY being returned to userspace, which matches the behaviour of the compat layer if it fails to translate an ioctl command. This patch fixes the pipe ioctl to return -ENOIOCTLCMD instead of -EINVAL when passed an unknown ioctl command. Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-31vfs: remove unused __d_splice_alias argumentJ. Bruce Fields1-8/+5
Nobody sets want_disconn any more. Reported-by: Peng Tao <bergwolf@gmail.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-31vfs: stop d_splice_alias creating directory aliasesJ. Bruce Fields1-2/+1
A directory should never have more than one dentry pointing to it. But d_splice_alias() will add one if it finds a directory with an already-existing non-DISCONNECTED dentry. I can't find an obvious reproducer, but I also can't see what prevents d_splice_alias() from encountering such a case. It therefore seems safest to allow d_splice_alias to use any dentry it finds. (Prior to the removal of dentry_unhash() from vfs_rmdir(), around v3.0, this could cause an nfsd deadlock like this: - Somebody attempts to remove a non-empty directory. - The dentry_unhash() in vfs_rmdir() unhashes the dentry pointing to the non-empty directory. - ->rmdir() then fails with -ENOTEMPTY - Before the vfs_rmdir() caller reaches dput(), an nfsd process in rename looks up the directory by filehandle; at the end of that lookup, this dentry is found by d_alloc_anon(), and a reference is taken on it, preventing dput() from removing it. - A regular lookup of the directory calls d_splice_alias(), finds only an unhashed (not a DISCONNECTED) dentry, and insteads adds a new one, so the directory now has two dentries. - The nfsd process in rename, which was previously looking up the source directory of the rename, now looks up the target directory (which is the same), and gets the dentry newly created by the previous lookup. - The rename, seeing two different dentries, assumes this is a cross-directory rename and attempts to take the i_mutex on the directory twice. That reproducer no longer exists, but I don't think there was anything fundamentally incorrect about the vfs_rmdir() behavior there, so I think the real fault was here in d_splice_alias().) Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-31fsnotify: remove unused parameter from send_to_group()Dan Carpenter1-6/+6
We don't use "mnt" anymore in send_to_group() after 1968f5eed5 ("fanotify: use both marks when possible") was applied. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-31vfs: increment iversion when a file is truncatedDmitry Kasatkin1-0/+5
When a file is truncated with truncate()/ftruncate() and then closed, iversion is not updated. This patch uses ATTR_SIZE flag as an indication to increment iversion. Mimi said: On fput(), i_version is used to detect and flag files that have changed and need to be re-measured in the IMA measurement policy. When a file is truncated with truncate()/ftruncate() and then closed, i_version is not updated. As a result, although the file has changed, it will not be re-measured and added to the IMA measurement list on subsequent access. Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@intel.com> Acked-by: Mimi Zohar <zohar@us.ibm.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-31fs: Move bh_cachep to the __read_mostly sectionShai Fultheim1-1/+1
bh_cachep is only written to once on initialization, so move it to the __read_mostly section. Signed-off-by: Shai Fultheim <shai@scalemp.com> Signed-off-by: Vlad Zolotarov <vlad@scalemp.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-31fs: move file_remove_suid() to fs/inode.cCong Wang1-0/+65
file_remove_suid() is a generic function operates on struct file, it almost has no relations with file mapping, so move it to fs/inode.c. Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-31jffs2: get rid of jffs2_sync_superArtem Bityutskiy4-21/+58
Currently JFFS2 file-system maps the VFS "superblock" abstraction to the write-buffer. Namely, it uses VFS services to synchronize the write-buffer periodically. The whole "superblock write-out" VFS infrastructure is served by the 'sync_supers()' kernel thread, which wakes up every 5 (by default) seconds and writes out all dirty superblock using the '->write_super()' call-back. But the problem with this thread is that it wastes power by waking up the system every 5 seconds no matter what. So we want to kill it completely and thus, we need to make file-systems to stop using the '->write_super' VFS service, and then remove it together with the kernel thread. This patch switches the JFFS2 write-buffer management from '->write_super()'/'->s_dirt' to a delayed work. Instead of setting the 's_dirt' flag we just schedule a delayed work for synchronizing the write-buffer. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-31jffs2: remove unnecessary GC pass on syncArtem Bityutskiy1-2/+0
We do not need to call 'jffs2_write_super()' on sync. This function causes a GC pass to make sure the current contents is pushed out with the data which we already have on the media. But this is not needed on unmount and only slows sync down unnecessarily. It is enough to just sync the write-buffer. This call was added by one of the generic VFS rework patch-sets, see d579ed00aa96a7f7486978540a0d7cecaff742ae. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-31jffs2: remove unnecessary GC pass on umountArtem Bityutskiy1-3/+0
We do not need to call 'jffs2_write_super()' on unmount. This function causes a GC pass to make sure the current contents is pushed out with the data which we already have on the media. But this is not needed on unmount and only slows unmount down unnecessarily. It is enough to just sync the write-buffer. This call was added by one of the generic VFS rework patch-sets, see 8c85e125124a473d6f3e9bb187b0b84207f81d91. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-31jffs2: remove lock_superArtem Bityutskiy1-3/+0
We do not need 'lock_super()'/'unlock_super()' in JFFS2 - kill them. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30get rid of idiotic misplaced __kernel_mode_t in ncfps kernel-private data ↵Al Viro1-5/+5
structure Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30brlocks/lglocks: API cleanupsAndi Kleen6-95/+96
lglocks and brlocks are currently generated with some complicated macros in lglock.h. But there's no reason to not just use common utility functions and put all the data into a common data structure. In preparation, this patch changes the API to look more like normal function calls with pointers, not magic macros. The patch is rather large because I move over all users in one go to keep it bisectable. This impacts the VFS somewhat in terms of lines changed. But no actual behaviour change. [akpm@linux-foundation.org: checkpatch fixes] Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30brlocks/lglocks: turn into functionsAndi Kleen2-2/+1
lglocks and brlocks are currently generated with some complicated macros in lglock.h. But there's no reason to not just use common utility functions and put all the data into a common data structure. Since there are at least two users it makes sense to share this code in a library. This is also easier maintainable than a macro forest. This will also make it later possible to dynamically allocate lglocks and also use them in modules (this would both still need some additional, but now straightforward, code) [akpm@linux-foundation.org: checkpatch fixes] Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30ocfs: simplify symlink handlingAl Viro4-104/+31
seeing that "fast" symlinks still get allocation + copy, we might as well simply switch them to pagecache-based variant of ->follow_link(); just need an appropriate ->readpage() for them... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30get rid of pointless allocations and copying in ecryptfs_follow_link()Al Viro1-39/+9
switch to generic_readlink(), while we are at it Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30hpfs: assorted endianness annotationsAl Viro4-60/+60
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30hpfs: annotate eaAl Viro1-2/+2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30hpfs: annotate struct hpfs_direntAl Viro3-12/+12
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30hpfs: annotate struct anodeAl Viro1-4/+4
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30hpfs: annotate struct fnodeAl Viro1-14/+14
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30hpfs: annotate btree nodes, get rid of bitfields messAl Viro3-51/+52
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30hpfs: annotate struct dnodeAl Viro1-4/+4
little-endians... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30hpfs: bitmaps are little-endianAl Viro3-12/+12
annotate properly... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30hpfs: get rid of bitfields in struct fnodeAl Viro8-38/+32
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30hpfs: get rid of bitfields endianness wanking in extended_attributeAl Viro3-34/+35
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30fs: fix inode.c kernel-doc warningsRandy Dunlap1-2/+1
Fix kernel-doc warnings in fs/inode.c: Warning(fs/inode.c:1493): No description found for parameter 'path' Warning(fs/inode.c:1493): Excess function parameter 'mnt' description in 'touch_atime' Warning(fs/inode.c:1493): Excess function parameter 'dentry' description in 'touch_atime' Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30hpfs: endianness bugsAl Viro2-3/+3
a couple of le32 and le16 used with wrong le..._to_cpu(), plus idiotic use of le32_to_cpu() on 1-bit bitfield Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30btrfs: trivial endianness annotationsAl Viro3-7/+8
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30ocfs2: kill endianness abuses in blockcheck.cAl Viro1-20/+22
ocfs2_block_check is for little-endian contents; if we just want to its fields converted to host-endian in a couple of functions, just put those values into local u32 and u16... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30ocfs2: deal with __user misannotationsAl Viro2-21/+16
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30ocfs2: trivial endianness misannotationsAl Viro3-5/+5
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30affs: bury unused macrosAl Viro1-8/+0
... unused since 2.4.4. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30kill v9fs_dentry_from_dir_inode()Al Viro1-21/+3
In *all* callers we have a dentry of child of that directory. Just use ->d_parent of that one, for fsck sake... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30ceph: move encode_fh to new APISage Weil1-13/+21
Use parent_inode has a flag for whether nfsd wants a connectable fh, but generate one opportunistically so that we can take advantage of the additional info in there. Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30->encode_fh() API changeAl Viro13-130/+88
pass inode + parent's inode or NULL instead of dentry + bool saying whether we want the parent or not. NOTE: that needs ceph fix folded in. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30ubifs: use generic_fillattr()Al Viro1-10/+1
don't open-code it... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30xfs: switch to proper __bitwise type for KM_... flagsAl Viro6-19/+20
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-30switch utimes() to fget_light/fput_lightAl Viro1-2/+3
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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