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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

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* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (96 commits)
  no need for list_for_each_entry_safe()/resetting with superblock list
  Fix sget() race with failing mount
  vfs: don't hold s_umount over close_bdev_exclusive() call
  sysv: do not mark superblock dirty on remount
  sysv: do not mark superblock dirty on mount
  btrfs: remove junk sb_dirt change
  BFS: clean up the superblock usage
  AFFS: wait for sb synchronization when needed
  AFFS: clean up dirty flag usage
  cifs: truncate fallout
  mbcache: fix shrinker function return value
  mbcache: Remove unused features
  add f_flags to struct statfs(64)
  pass a struct path to vfs_statfs
  update VFS documentation for method changes.
  All filesystems that need invalidate_inode_buffers() are doing that explicitly
  convert remaining ->clear_inode() to ->evict_inode()
  Make ->drop_inode() just return whether inode needs to be dropped
  fs/inode.c:clear_inode() is gone
  fs/inode.c:evict() doesn't care about delete vs. non-delete paths now
  ...

Fix up trivial conflicts in fs/nilfs2/super.c
This commit is contained in:
Linus Torvalds 2010-08-10 11:26:52 -07:00
commit 5f248c9c25
205 changed files with 2584 additions and 2475 deletions
Download patch file Download diff file Expand all files Collapse all files

23
fs/ubifs/file.c
View file

@ -967,14 +967,15 @@ static int do_writepage(struct page *page, int len)
* the page locked, and it locks @ui_mutex. However, write-back does take inode
* @i_mutex, which means other VFS operations may be run on this inode at the
* same time. And the problematic one is truncation to smaller size, from where
* we have to call 'simple_setsize()', which first changes @inode->i_size, then
* we have to call 'truncate_setsize()', which first changes @inode->i_size, then
* drops the truncated pages. And while dropping the pages, it takes the page
* lock. This means that 'do_truncation()' cannot call 'simple_setsize()' with
* lock. This means that 'do_truncation()' cannot call 'truncate_setsize()' with
* @ui_mutex locked, because it would deadlock with 'ubifs_writepage()'. This
* means that @inode->i_size is changed while @ui_mutex is unlocked.
*
* XXX: with the new truncate the above is not true anymore, the simple_setsize
* calls can be replaced with the individual components.
* XXX(truncate): with the new truncate sequence this is not true anymore,
* and the calls to truncate_setsize can be move around freely. They should
* be moved to the very end of the truncate sequence.
*
* But in 'ubifs_writepage()' we have to guarantee that we do not write beyond
* inode size. How do we do this if @inode->i_size may became smaller while we
@ -1128,9 +1129,7 @@ static int do_truncation(struct ubifs_info *c, struct inode *inode,
budgeted = 0;
}
err = simple_setsize(inode, new_size);
if (err)
goto out_budg;
truncate_setsize(inode, new_size);
if (offset) {
pgoff_t index = new_size >> PAGE_CACHE_SHIFT;
@ -1217,16 +1216,14 @@ static int do_setattr(struct ubifs_info *c, struct inode *inode,
if (attr->ia_valid & ATTR_SIZE) {
dbg_gen("size %lld -> %lld", inode->i_size, new_size);
err = simple_setsize(inode, new_size);
if (err)
goto out;
truncate_setsize(inode, new_size);
}
mutex_lock(&ui->ui_mutex);
if (attr->ia_valid & ATTR_SIZE) {
/* Truncation changes inode [mc]time */
inode->i_mtime = inode->i_ctime = ubifs_current_time(inode);
/* 'simple_setsize()' changed @i_size, update @ui_size */
/* 'truncate_setsize()' changed @i_size, update @ui_size */
ui->ui_size = inode->i_size;
}
@ -1248,10 +1245,6 @@ static int do_setattr(struct ubifs_info *c, struct inode *inode,
if (IS_SYNC(inode))
err = inode->i_sb->s_op->write_inode(inode, NULL);
return err;
out:
ubifs_release_budget(c, &req);
return err;
}
int ubifs_setattr(struct dentry *dentry, struct iattr *attr)

12
fs/ubifs/super.c
View file

@ -327,7 +327,7 @@ static int ubifs_write_inode(struct inode *inode, struct writeback_control *wbc)
return err;
}
static void ubifs_delete_inode(struct inode *inode)
static void ubifs_evict_inode(struct inode *inode)
{
int err;
struct ubifs_info *c = inode->i_sb->s_fs_info;
@ -343,9 +343,12 @@ static void ubifs_delete_inode(struct inode *inode)
dbg_gen("inode %lu, mode %#x", inode->i_ino, (int)inode->i_mode);
ubifs_assert(!atomic_read(&inode->i_count));
ubifs_assert(inode->i_nlink == 0);
truncate_inode_pages(&inode->i_data, 0);
if (inode->i_nlink)
goto done;
if (is_bad_inode(inode))
goto out;
@ -367,7 +370,8 @@ out:
c->nospace = c->nospace_rp = 0;
smp_wmb();
}
clear_inode(inode);
done:
end_writeback(inode);
}
static void ubifs_dirty_inode(struct inode *inode)
@ -1826,7 +1830,7 @@ const struct super_operations ubifs_super_operations = {
.destroy_inode = ubifs_destroy_inode,
.put_super = ubifs_put_super,
.write_inode = ubifs_write_inode,
.delete_inode = ubifs_delete_inode,
.evict_inode = ubifs_evict_inode,
.statfs = ubifs_statfs,
.dirty_inode = ubifs_dirty_inode,
.remount_fs = ubifs_remount_fs,

2
fs/ubifs/ubifs.h
View file

@ -379,7 +379,7 @@ struct ubifs_gced_idx_leb {
* The @ui_size is a "shadow" variable for @inode->i_size and UBIFS uses
* @ui_size instead of @inode->i_size. The reason for this is that UBIFS cannot
* make sure @inode->i_size is always changed under @ui_mutex, because it
* cannot call 'simple_setsize()' with @ui_mutex locked, because it would deadlock
* cannot call 'truncate_setsize()' with @ui_mutex locked, because it would deadlock
* with 'ubifs_writepage()' (see file.c). All the other inode fields are
* changed under @ui_mutex, so they do not need "shadow" fields. Note, one
* could consider to rework locking and base it on "shadow" fields.