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| author | Christoph Hellwig <hch@lst.de> | 2007-02-20 13:58:11 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-20 17:10:15 -0800 |
| commit | 2be3c79046cf90d75d436708a4e0898c7a1f9d51 (patch) | |
| tree | 2a5727bb2a4132af009afc24e54661dd32d3efe2 | |
| parent | c9ffec48487849bc277de662a6c29aad64653b99 (diff) | |
| download | op-kernel-dev-2be3c79046cf90d75d436708a4e0898c7a1f9d51.zip op-kernel-dev-2be3c79046cf90d75d436708a4e0898c7a1f9d51.tar.gz | |
[PATCH] affs: implement ->drop_inode
affs wants to truncate the inode when the last user goes away, currently it
does that through a potentially racy i_count check in ->put_inode. But we
already have a method that's called just after the we dropped the last
reference, ->drop_inode. This patch implements affs_drop_inode to take
advantage of this.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/affs/affs.h | 1 | ||||
| -rw-r--r-- | fs/affs/inode.c | 17 | ||||
| -rw-r--r-- | fs/affs/super.c | 1 |
3 files changed, 13 insertions, 6 deletions
diff --git a/fs/affs/affs.h b/fs/affs/affs.h index 7db2d28..232c694 100644 --- a/fs/affs/affs.h +++ b/fs/affs/affs.h @@ -171,6 +171,7 @@ extern unsigned long affs_parent_ino(struct inode *dir); extern struct inode *affs_new_inode(struct inode *dir); extern int affs_notify_change(struct dentry *dentry, struct iattr *attr); extern void affs_put_inode(struct inode *inode); +extern void affs_drop_inode(struct inode *inode); extern void affs_delete_inode(struct inode *inode); extern void affs_clear_inode(struct inode *inode); extern void affs_read_inode(struct inode *inode); diff --git a/fs/affs/inode.c b/fs/affs/inode.c index fce6848..c5b9d73c 100644 --- a/fs/affs/inode.c +++ b/fs/affs/inode.c @@ -243,12 +243,17 @@ affs_put_inode(struct inode *inode) { pr_debug("AFFS: put_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink); affs_free_prealloc(inode); - if (atomic_read(&inode->i_count) == 1) { - mutex_lock(&inode->i_mutex); - if (inode->i_size != AFFS_I(inode)->mmu_private) - affs_truncate(inode); - mutex_unlock(&inode->i_mutex); - } +} + +void +affs_drop_inode(struct inode *inode) +{ + mutex_lock(&inode->i_mutex); + if (inode->i_size != AFFS_I(inode)->mmu_private) + affs_truncate(inode); + mutex_unlock(&inode->i_mutex); + + generic_drop_inode(inode); } void diff --git a/fs/affs/super.c b/fs/affs/super.c index a324045..c3986a1 100644 --- a/fs/affs/super.c +++ b/fs/affs/super.c @@ -118,6 +118,7 @@ static const struct super_operations affs_sops = { .read_inode = affs_read_inode, .write_inode = affs_write_inode, .put_inode = affs_put_inode, + .drop_inode = affs_drop_inode, .delete_inode = affs_delete_inode, .clear_inode = affs_clear_inode, .put_super = affs_put_super, |
