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2010-08-09BFS: clean up the superblock usageArtem Bityutskiy
BFS is a very simple FS and its superblocks contains only static information and is never changed. However, the BFS code for some misterious reasons marked its buffer head as dirty from time to time, but nothing in that buffer was ever changed. This patch removes all the BFS superblock manipulation, simply because it is not needed. It removes: 1. The si_sbh filed from 'struct bfs_sb_info' because it is not needed. We only need to read the SB once on mount to get the start of data blocks and the FS size. After this, we can forget about the SB. 2. All instances of 'mark_buffer_dirty(sbh)' for BFS SB because it is never changed. 3. The '->sync_fs()' method because there is nothing to sync (inodes are synched by VFS). 4. The '->write_super()' method, again, because the SB is never changed. Tested-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09AFFS: wait for sb synchronization when neededArtem Bityutskiy
AFFS does not ever wait for superblock synchronization in ->put_super(), ->write_super, and ->sync_fs(). However, it should wait for synchronization in ->put_super() because it is about to be unmounted, in ->write_super() because this is periodic SB synchronization performed from a separate kernel thread, and in ->sync_fs() it should respect the 'wait' flag. This patch fixes the situation. Also, in ->put_super(), do not write the SB if it is not dirty. Tested-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09AFFS: clean up dirty flag usageArtem Bityutskiy
In 'affs_write_super()': remove ancient and wrong commented code, remove unneeded 'clean' variable, so the function becomes a bit cleaner and simpler. In 'affs_remount(): remove unnecessary SB dirty flag changes. Tested-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09cifs: truncate falloutChristoph Hellwig
Remove the calls to inode_newsize_ok given that we already did it as part of inode_change_ok in the beginning of cifs_setattr_(no)unix. No need to call ->truncate if cifs doesn't have one, so remove the explicit call in cifs_vmtruncate, and replace the calls to vmtruncate with truncate_setsize which is vmtruncate minus inode_newsize_ok and the call to ->truncate. Rename cifs_vmtruncate to cifs_setsize to match the new calling conventions. Question 1: why does cifs do the pagecache munging and i_size update twice for each setattr call, once opencoded in cifs_vmtruncate, and once using the VFS helpers? Question 2: what is supposed to be protected by i_lock in cifs_vmtruncate? Do we need it around the call to inode_change_ok? [AV: fixed build breakage] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09mbcache: fix shrinker function return valueAndreas Gruenbacher
The shrinker function is supposed to return the number of cache entries after shrinking, not before shrinking. Fix that. Based on a patch from Wang Sheng-Hui <crosslonelyover@gmail.com>. Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09mbcache: Remove unused featuresAndreas Gruenbacher
The mbcache code was written to support a variable number of indexes, but all the existing users use exactly one index. Simplify to code to support only that case. There are also no users of the cache entry free operation, and none of the users keep extra data in cache entries. Remove those features as well. Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09add f_flags to struct statfs(64)Christoph Hellwig
Add a flags field to help glibc implementing statvfs(3) efficiently. We copy the flag values from glibc, and add a new ST_VALID flag to denote that f_flags is implemented. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09pass a struct path to vfs_statfsChristoph Hellwig
We'll need the path to implement the flags field for statvfs support. We do have it available in all callers except: - ecryptfs_statfs. This one doesn't actually need vfs_statfs but just needs to do a caller to the lower filesystem statfs method. - sys_ustat. Add a non-exported statfs_by_dentry helper for it which doesn't won't be able to fill out the flags field later on. In addition rename the helpers for statfs vs fstatfs to do_*statfs instead of the misleading vfs prefix. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09update VFS documentation for method changes.Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09All filesystems that need invalidate_inode_buffers() are doing that explicitlyAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09convert remaining ->clear_inode() to ->evict_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09Make ->drop_inode() just return whether inode needs to be droppedAl Viro
... and let iput_final() do the actual eviction or retention Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09fs/inode.c:clear_inode() is goneAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09fs/inode.c:evict() doesn't care about delete vs. non-delete paths nowAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09->delete_inode() is goneAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09convert ext4 to ->evict_inode()Al Viro
pretty much brute-force... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09convert logfs to ->evict_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09logfs: get rid of magical inodesAl Viro
ordering problems at ->kill_sb() time are solved by doing iput() of these suckers in ->put_super() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09convert nilfs2 to ->evict_inode()Al Viro
[folded build fix from sfr] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09convert exofs to ->evict_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09convert reiserfs to ->evict_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09convert btrfs to ->evict_inode()Al Viro
NB: do we want btrfs_wait_ordered_range() on eviction of inodes with positive i_nlink on subvolume with zero root_refs? If not, btrfs_evict_inode() can be simplified by unconditionally bailing out in case of i_nlink > 0 in the very beginning... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09switch gfs2 to ->evict_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09convert ocfs2 to ->evict_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09switch ncpfs to ->evict_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09switch udf to ->evict_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09switch ubifs to ->evict_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09switch jfs to ->evict_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09switch hpfs to ->evict_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09switch hppfs to ->evict_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09try to get rid of races in hostfs open()Al Viro
In case of mode mismatch, do *not* blindly close the descriptor another openers might be using right now. Open the underlying file with currently sufficient mode, then * if current mode has grown so that it's sufficient for us now, just close our new fd * if current mode has grown and our fd is *not* enough to cover it, close and repeat. * otherwise, install our fd if the file hadn't been opened at all or dup2() our fd over the current one (and close our fd). Critical section is protected by mutex; yes, system-wide. All we do under it is a bunch of comparison and maybe an overwriting dup2() on host. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09leak in hostfs_unlink()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09hostfs: fix races in dentry_name() and inode_name()Al Viro
calculating size, then doing allocation, then filling the path is a Bad Idea(tm), since the ancestors can be renamed, leading to buffer overrun. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09new helper: __dentry_path()Al Viro
builds path relative to fs root, called under dcache_lock, doesn't append any nonsense to unlinked ones. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09hostfs: sanitize symlinksAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09hostfs: get rid of inode_dentry_name()Al Viro
it's equivalent to dentry_name() anyway Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09hostfs: get rid of file_type(), fold init_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09switch stat_file() to passing a single struct rather than fsckloads of pointersAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09hostfs: pass pathname to init_inode()Al Viro
We will calculate it in all callers anyway, so there's no need to duplicate that inside. Moreover, that way we lose all failure exits in init_inode(), so it doesn't need to return anything. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09get rid of hostfs_read_inode()Al Viro
There are only two call sites; in one (hostfs_iget()) it's actually a no-op and in another (fill_super()) it's easier to expand the damn thing and use what we know about its arguments to simplify it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09hostfs: don't keep a field in each inode when we are using it only in rootAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09stop icache pollution in hostfs, switch to ->evict_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09switch affs to ->evict_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09switch omfs to ->evict_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09switch bfs to ->evict_inode(), clean upAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09convert ext3 to ->evict_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09spufs conversion to ->evict_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09switch ufs to ->evict_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09covert fatfs to ->evict_inode()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-09switch smbfs to evict_inode()Al Viro
NB: treatment of inode hash is completely braindead there Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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