Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

4 files changed, 24 insertions, 17 deletions

diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
index 7c420b800c34..e58669e1b87c 100644
--- a/fs/ext2/acl.c
+++ b/fs/ext2/acl.c
@@ -464,7 +464,7 @@ ext2_xattr_set_acl(struct inode *inode, int type, const void *value,
 
         if (!test_opt(inode->i_sb, POSIX_ACL))
                 return -EOPNOTSUPP;
-        if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+        if (!is_owner_or_cap(inode))
                 return -EPERM;
 
         if (value) {
diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index 04afeecaaef3..ab7961260c49 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -24,9 +24,9 @@
 #include "acl.h"
 
 /*
- * Called when an inode is released. Note that this is different
- * from ext2_open_file: open gets called at every open, but release
- * gets called only when /all/ the files are closed.
+ * Called when filp is released. This happens when all file descriptors
+ * for a single struct file are closed. Note that different open() calls
+ * for the same file yield different struct file structures.
  */
 static int ext2_release_file (struct inode * inode, struct file * filp)
 {
diff --git a/fs/ext2/ioctl.c b/fs/ext2/ioctl.c
index e85c48218239..3bcd25422ee4 100644
--- a/fs/ext2/ioctl.c
+++ b/fs/ext2/ioctl.c
@@ -36,7 +36,7 @@ int ext2_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
                 if (IS_RDONLY(inode))
                         return -EROFS;
 
-                if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+                if (!is_owner_or_cap(inode))
                         return -EACCES;
 
                 if (get_user(flags, (int __user *) arg))
@@ -74,7 +74,7 @@ int ext2_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
         case EXT2_IOC_GETVERSION:
                 return put_user(inode->i_generation, (int __user *) arg);
         case EXT2_IOC_SETVERSION:
-                if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+                if (!is_owner_or_cap(inode))
                         return -EPERM;
                 if (IS_RDONLY(inode))
                         return -EROFS;
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 5de5061eb331..68579a0ed3f0 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -25,6 +25,7 @@
 #include <linux/parser.h>
 #include <linux/random.h>
 #include <linux/buffer_head.h>
+#include <linux/exportfs.h>
 #include <linux/smp_lock.h>
 #include <linux/vfs.h>
 #include <linux/seq_file.h>
@@ -166,14 +167,14 @@ static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flag
 #endif
         inode_init_once(&ei->vfs_inode);
 }
- 
+
 static int init_inodecache(void)
 {
         ext2_inode_cachep = kmem_cache_create("ext2_inode_cache",
                                              sizeof(struct ext2_inode_info),
                                              0, (SLAB_RECLAIM_ACCOUNT|
                                                 SLAB_MEM_SPREAD),
-                                             init_once, NULL);
+                                             init_once);
         if (ext2_inode_cachep == NULL)
                 return -ENOMEM;
         return 0;
@@ -882,13 +883,11 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
                 goto failed_mount;
         }
         bgl_lock_init(&sbi->s_blockgroup_lock);
-        sbi->s_debts = kmalloc(sbi->s_groups_count * sizeof(*sbi->s_debts),
-                               GFP_KERNEL);
+        sbi->s_debts = kcalloc(sbi->s_groups_count, sizeof(*sbi->s_debts), GFP_KERNEL);
         if (!sbi->s_debts) {
                 printk ("EXT2-fs: not enough memory\n");
                 goto failed_mount_group_desc;
         }
-        memset(sbi->s_debts, 0, sbi->s_groups_count * sizeof(*sbi->s_debts));
         for (i = 0; i < db_count; i++) {
                 block = descriptor_loc(sb, logic_sb_block, i);
                 sbi->s_group_desc[i] = sb_bread(sb, block);
@@ -1099,15 +1098,18 @@ static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf)
         struct super_block *sb = dentry->d_sb;
         struct ext2_sb_info *sbi = EXT2_SB(sb);
         struct ext2_super_block *es = sbi->s_es;
-        unsigned long overhead;
-        int i;
         u64 fsid;
 
         if (test_opt (sb, MINIX_DF))
-                overhead = 0;
-        else {
+                sbi->s_overhead_last = 0;
+        else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) {
+                unsigned long i, overhead = 0;
+                smp_rmb();
+
                 /*
-                 * Compute the overhead (FS structures)
+                 * Compute the overhead (FS structures). This is constant
+                 * for a given filesystem unless the number of block groups
+                 * changes so we cache the previous value until it does.
                  */
 
                 /*
@@ -1131,17 +1133,22 @@ static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf)
                  */
                 overhead += (sbi->s_groups_count *
                              (2 + sbi->s_itb_per_group));
+                sbi->s_overhead_last = overhead;
+                smp_wmb();
+                sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count);
         }
 
         buf->f_type = EXT2_SUPER_MAGIC;
         buf->f_bsize = sb->s_blocksize;
-        buf->f_blocks = le32_to_cpu(es->s_blocks_count) - overhead;
+        buf->f_blocks = le32_to_cpu(es->s_blocks_count) - sbi->s_overhead_last;
         buf->f_bfree = ext2_count_free_blocks(sb);
+        es->s_free_blocks_count = cpu_to_le32(buf->f_bfree);
         buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count);
         if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count))
                 buf->f_bavail = 0;
         buf->f_files = le32_to_cpu(es->s_inodes_count);
         buf->f_ffree = ext2_count_free_inodes(sb);
+        es->s_free_inodes_count = cpu_to_le32(buf->f_ffree);
         buf->f_namelen = EXT2_NAME_LEN;
         fsid = le64_to_cpup((void *)es->s_uuid) ^
                le64_to_cpup((void *)es->s_uuid + sizeof(u64));