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AFS: AFS fixups

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Make some miscellaneous changes to the AFS filesystem:

 (1) Assert RCU barriers on module exit to make sure RCU has finished with
     callbacks in this module.

 (2) Correctly handle the AFS server returning a zero-length read.

 (3) Split out data zapping calls into one function (afs_zap_data).

 (4) Rename some afs_file_*() functions to afs_*() where they apply to
     non-regular files too.

 (5) Be consistent about the presentation of volume ID:vnode ID in debugging
     output.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Howells
2007-05-09 02:33:45 -07:00
committed by Linus Torvalds
parent ef71c15c46
commit 416351f28d
12 changed files with 121 additions and 109 deletions
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25
fs/afs/inode.c
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@@ -125,7 +125,7 @@ struct inode *afs_iget(struct super_block *sb, struct key *key,
struct inode *inode;
int ret;
_enter(",{%u,%u,%u},,", fid->vid, fid->vnode, fid->unique);
_enter(",{%x:%u.%u},,", fid->vid, fid->vnode, fid->unique);
as = sb->s_fs_info;
data.volume = as->volume;
@@ -203,6 +203,19 @@ bad_inode:
return ERR_PTR(ret);
}
/*
* mark the data attached to an inode as obsolete due to a write on the server
* - might also want to ditch all the outstanding writes and dirty pages
*/
void afs_zap_data(struct afs_vnode *vnode)
{
kenter("zap data {%x:%u}", vnode->fid.vid, vnode->fid.vnode);
/* nuke all the non-dirty pages that aren't locked, mapped or being
* written back */
invalidate_remote_inode(&vnode->vfs_inode);
}
/*
* validate a vnode/inode
* - there are several things we need to check
@@ -258,10 +271,8 @@ int afs_validate(struct afs_vnode *vnode, struct key *key)
/* if the vnode's data version number changed then its contents are
* different */
if (test_and_clear_bit(AFS_VNODE_ZAP_DATA, &vnode->flags)) {
_debug("zap data {%x:%d}", vnode->fid.vid, vnode->fid.vnode);
invalidate_remote_inode(&vnode->vfs_inode);
}
if (test_and_clear_bit(AFS_VNODE_ZAP_DATA, &vnode->flags))
afs_zap_data(vnode);
clear_bit(AFS_VNODE_MODIFIED, &vnode->flags);
mutex_unlock(&vnode->validate_lock);
@@ -278,7 +289,7 @@ error_unlock:
/*
* read the attributes of an inode
*/
int afs_inode_getattr(struct vfsmount *mnt, struct dentry *dentry,
int afs_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat)
{
struct inode *inode;
@@ -301,7 +312,7 @@ void afs_clear_inode(struct inode *inode)
vnode = AFS_FS_I(inode);
_enter("{%x:%d.%d} v=%u x=%u t=%u }",
_enter("{%x:%u.%d} v=%u x=%u t=%u }",
vnode->fid.vid,
vnode->fid.vnode,
vnode->fid.unique,