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author | Christoph Hellwig <hch@lst.de> | 2010-06-04 11:30:01 +0200 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2010-08-09 16:47:36 -0400 |
commit | eef2380c187890816b73b1a4cb89a09203759469 (patch) | |
tree | 1b4764753f0e2c718accd4f3541493efcd663007 /fs/libfs.c | |
parent | 6a1a90ad1b0edb556a7550a6ef8a8756f0304dd5 (diff) | |
download | linux-stable-eef2380c187890816b73b1a4cb89a09203759469.tar.gz linux-stable-eef2380c187890816b73b1a4cb89a09203759469.tar.bz2 linux-stable-eef2380c187890816b73b1a4cb89a09203759469.zip |
default to simple_setattr
With the new truncate sequence every filesystem that wants to support file
size changes on disk needs to implement its own ->setattr. So instead
of calling inode_setattr which supports size changes call into a simple
method that doesn't support this. simple_setattr is almost what we
want except that it does not mark the inode dirty after changes. Given
that marking the inode dirty is a no-op for the simple in-memory filesystems
that use simple_setattr currently just add the mark_inode_dirty call.
Also add a WARN_ON for the presence of a truncate method to simple_setattr
to catch new instances of it during the transition period.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/libfs.c')
-rw-r--r-- | fs/libfs.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/fs/libfs.c b/fs/libfs.c index 861a88797716..40562224b718 100644 --- a/fs/libfs.c +++ b/fs/libfs.c @@ -370,21 +370,26 @@ int simple_setsize(struct inode *inode, loff_t newsize) EXPORT_SYMBOL(simple_setsize); /** - * simple_setattr - setattr for simple in-memory filesystem + * simple_setattr - setattr for simple filesystem * @dentry: dentry * @iattr: iattr structure * * Returns 0 on success, -error on failure. * - * simple_setattr implements setattr for an in-memory filesystem which - * does not store its own file data or metadata (eg. uses the page cache - * and inode cache as its data store). + * simple_setattr is a simple ->setattr implementation without a proper + * implementation of size changes. + * + * It can either be used for in-memory filesystems or special files + * on simple regular filesystems. Anything that needs to change on-disk + * or wire state on size changes needs its own setattr method. */ int simple_setattr(struct dentry *dentry, struct iattr *iattr) { struct inode *inode = dentry->d_inode; int error; + WARN_ON_ONCE(inode->i_op->truncate); + error = inode_change_ok(inode, iattr); if (error) return error; @@ -396,7 +401,8 @@ int simple_setattr(struct dentry *dentry, struct iattr *iattr) } setattr_copy(inode, iattr); - return error; + mark_inode_dirty(inode); + return 0; } EXPORT_SYMBOL(simple_setattr); |