[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>
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Родитель
c9ffec4848
Коммит
2be3c79046
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@ -171,6 +171,7 @@ extern unsigned long affs_parent_ino(struct inode *dir);
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extern struct inode *affs_new_inode(struct inode *dir);
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extern int affs_notify_change(struct dentry *dentry, struct iattr *attr);
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extern void affs_put_inode(struct inode *inode);
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extern void affs_drop_inode(struct inode *inode);
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extern void affs_delete_inode(struct inode *inode);
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extern void affs_clear_inode(struct inode *inode);
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extern void affs_read_inode(struct inode *inode);
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@ -243,12 +243,17 @@ affs_put_inode(struct inode *inode)
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{
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pr_debug("AFFS: put_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
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affs_free_prealloc(inode);
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if (atomic_read(&inode->i_count) == 1) {
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mutex_lock(&inode->i_mutex);
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if (inode->i_size != AFFS_I(inode)->mmu_private)
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affs_truncate(inode);
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mutex_unlock(&inode->i_mutex);
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}
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}
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void
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affs_drop_inode(struct inode *inode)
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{
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mutex_lock(&inode->i_mutex);
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if (inode->i_size != AFFS_I(inode)->mmu_private)
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affs_truncate(inode);
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mutex_unlock(&inode->i_mutex);
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generic_drop_inode(inode);
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}
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void
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@ -118,6 +118,7 @@ static const struct super_operations affs_sops = {
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.read_inode = affs_read_inode,
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.write_inode = affs_write_inode,
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.put_inode = affs_put_inode,
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.drop_inode = affs_drop_inode,
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.delete_inode = affs_delete_inode,
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.clear_inode = affs_clear_inode,
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.put_super = affs_put_super,
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