Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs

[safe/jmp/linux-2.6] / fs / inode.c

diff --git a/fs/inode.c b/fs/inode.c
index bca0c61..ae7b67e 100644 (file)
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -22,8 +22,10 @@
 #include <linux/cdev.h>
 #include <linux/bootmem.h>
 #include <linux/inotify.h>
+#include <linux/fsnotify.h>
 #include <linux/mount.h>
 #include <linux/async.h>
+#include <linux/posix_acl.h>
 
 /*
  * This is needed for the following functions:
@@ -118,12 +120,11 @@ static void wake_up_inode(struct inode *inode)
  * These are initializations that need to be done on every inode
  * allocation as the fields are not initialised by slab allocation.
  */
-struct inode *inode_init_always(struct super_block *sb, struct inode *inode)
+int inode_init_always(struct super_block *sb, struct inode *inode)
 {
        static const struct address_space_operations empty_aops;
        static struct inode_operations empty_iops;
        static const struct file_operations empty_fops;
-
        struct address_space *const mapping = &inode->i_data;
 
        inode->i_sb = sb;
@@ -150,7 +151,7 @@ struct inode *inode_init_always(struct super_block *sb, struct inode *inode)
        inode->dirtied_when = 0;
 
        if (security_inode_alloc(inode))
-               goto out_free_inode;
+               goto out;
 
        /* allocate and initialize an i_integrity */
        if (ima_inode_alloc(inode))
@@ -188,17 +189,20 @@ struct inode *inode_init_always(struct super_block *sb, struct inode *inode)
        }
        inode->i_private = NULL;
        inode->i_mapping = mapping;
+#ifdef CONFIG_FS_POSIX_ACL
+       inode->i_acl = inode->i_default_acl = ACL_NOT_CACHED;
+#endif
 
-       return inode;
+#ifdef CONFIG_FSNOTIFY
+       inode->i_fsnotify_mask = 0;
+#endif
+
+       return 0;
 
 out_free_security:
        security_inode_free(inode);
-out_free_inode:
-       if (inode->i_sb->s_op->destroy_inode)
-               inode->i_sb->s_op->destroy_inode(inode);
-       else
-               kmem_cache_free(inode_cachep, (inode));
-       return NULL;
+out:
+       return -ENOMEM;
 }
 EXPORT_SYMBOL(inode_init_always);
 
@@ -211,23 +215,43 @@ static struct inode *alloc_inode(struct super_block *sb)
        else
                inode = kmem_cache_alloc(inode_cachep, GFP_KERNEL);
 
-       if (inode)
-               return inode_init_always(sb, inode);
-       return NULL;
+       if (!inode)
+               return NULL;
+
+       if (unlikely(inode_init_always(sb, inode))) {
+               if (inode->i_sb->s_op->destroy_inode)
+                       inode->i_sb->s_op->destroy_inode(inode);
+               else
+                       kmem_cache_free(inode_cachep, inode);
+               return NULL;
+       }
+
+       return inode;
 }
 
-void destroy_inode(struct inode *inode)
+void __destroy_inode(struct inode *inode)
 {
        BUG_ON(inode_has_buffers(inode));
        ima_inode_free(inode);
        security_inode_free(inode);
+       fsnotify_inode_delete(inode);
+#ifdef CONFIG_FS_POSIX_ACL
+       if (inode->i_acl && inode->i_acl != ACL_NOT_CACHED)
+               posix_acl_release(inode->i_acl);
+       if (inode->i_default_acl && inode->i_default_acl != ACL_NOT_CACHED)
+               posix_acl_release(inode->i_default_acl);
+#endif
+}
+EXPORT_SYMBOL(__destroy_inode);
+
+void destroy_inode(struct inode *inode)
+{
+       __destroy_inode(inode);
        if (inode->i_sb->s_op->destroy_inode)
                inode->i_sb->s_op->destroy_inode(inode);
        else
                kmem_cache_free(inode_cachep, (inode));
 }
-EXPORT_SYMBOL(destroy_inode);
-
 
 /*
  * These are initializations that only need to be done
@@ -252,6 +276,9 @@ void inode_init_once(struct inode *inode)
        INIT_LIST_HEAD(&inode->inotify_watches);
        mutex_init(&inode->inotify_mutex);
 #endif
+#ifdef CONFIG_FSNOTIFY
+       INIT_HLIST_HEAD(&inode->i_fsnotify_mark_entries);
+#endif
 }
 EXPORT_SYMBOL(inode_init_once);
 
@@ -398,6 +425,7 @@ int invalidate_inodes(struct super_block *sb)
        mutex_lock(&iprune_mutex);
        spin_lock(&inode_lock);
        inotify_unmount_inodes(&sb->s_inodes);
+       fsnotify_unmount_inodes(&sb->s_inodes);
        busy = invalidate_list(&sb->s_inodes, &throw_away);
        spin_unlock(&inode_lock);
 
@@ -655,12 +683,17 @@ void unlock_new_inode(struct inode *inode)
        if (inode->i_mode & S_IFDIR) {
                struct file_system_type *type = inode->i_sb->s_type;
 
-               /*
-                * ensure nobody is actually holding i_mutex
-                */
-               mutex_destroy(&inode->i_mutex);
-               mutex_init(&inode->i_mutex);
-               lockdep_set_class(&inode->i_mutex, &type->i_mutex_dir_key);
+               /* Set new key only if filesystem hasn't already changed it */
+               if (!lockdep_match_class(&inode->i_mutex,
+                   &type->i_mutex_key)) {
+                       /*
+                        * ensure nobody is actually holding i_mutex
+                        */
+                       mutex_destroy(&inode->i_mutex);
+                       mutex_init(&inode->i_mutex);
+                       lockdep_set_class(&inode->i_mutex,
+                                         &type->i_mutex_dir_key);
+               }
        }
 #endif
        /*
@@ -1398,7 +1431,7 @@ EXPORT_SYMBOL(touch_atime);
  *     for writeback.  Note that this function is meant exclusively for
  *     usage in the file write path of filesystems, and filesystems may
  *     choose to explicitly ignore update via this function with the
- *     S_NOCTIME inode flag, e.g. for network filesystem where these
+ *     S_NOCMTIME inode flag, e.g. for network filesystem where these
  *     timestamps are handled by the server.
  */
 
@@ -1412,7 +1445,7 @@ void file_update_time(struct file *file)
        if (IS_NOCMTIME(inode))
                return;
 
-       err = mnt_want_write(file->f_path.mnt);
+       err = mnt_want_write_file(file);
        if (err)
                return;