ieee1394: merge from Linus

[linux-2.6-omap-h63xx.git] / fs / ext3 / super.c

diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index b2891cc29db153ded6f06a87e05b9e4e47032059..3559086eee5fb45ce45a79ed4f076b62759e2ce5 100644 (file)
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -16,7 +16,6 @@
  *        David S. Miller (davem@caip.rutgers.edu), 1995
  */
 
-#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/string.h>
 #include <linux/fs.h>
@@ -555,6 +554,47 @@ static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs)
        return 0;
 }
 
+
+static struct dentry *ext3_get_dentry(struct super_block *sb, void *vobjp)
+{
+       __u32 *objp = vobjp;
+       unsigned long ino = objp[0];
+       __u32 generation = objp[1];
+       struct inode *inode;
+       struct dentry *result;
+
+       if (ino < EXT3_FIRST_INO(sb) && ino != EXT3_ROOT_INO)
+               return ERR_PTR(-ESTALE);
+       if (ino > le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count))
+               return ERR_PTR(-ESTALE);
+
+       /* iget isn't really right if the inode is currently unallocated!!
+        *
+        * ext3_read_inode will return a bad_inode if the inode had been
+        * deleted, so we should be safe.
+        *
+        * Currently we don't know the generation for parent directory, so
+        * a generation of 0 means "accept any"
+        */
+       inode = iget(sb, ino);
+       if (inode == NULL)
+               return ERR_PTR(-ENOMEM);
+       if (is_bad_inode(inode) ||
+           (generation && inode->i_generation != generation)) {
+               iput(inode);
+               return ERR_PTR(-ESTALE);
+       }
+       /* now to find a dentry.
+        * If possible, get a well-connected one
+        */
+       result = d_alloc_anon(inode);
+       if (!result) {
+               iput(inode);
+               return ERR_PTR(-ENOMEM);
+       }
+       return result;
+}
+
 #ifdef CONFIG_QUOTA
 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
 #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
@@ -623,6 +663,7 @@ static struct super_operations ext3_sops = {
 
 static struct export_operations ext3_export_ops = {
        .get_parent = ext3_get_parent,
+       .get_dentry = ext3_get_dentry,
 };
 
 enum {
@@ -630,7 +671,7 @@ enum {
        Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro,
        Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov,
        Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
-       Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh,
+       Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh,
        Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev,
        Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
        Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
@@ -666,6 +707,7 @@ static match_table_t tokens = {
        {Opt_noreservation, "noreservation"},
        {Opt_noload, "noload"},
        {Opt_nobh, "nobh"},
+       {Opt_bh, "bh"},
        {Opt_commit, "commit=%u"},
        {Opt_journal_update, "journal=update"},
        {Opt_journal_inum, "journal=%u"},
@@ -1014,6 +1056,9 @@ clear_qf_name:
                case Opt_nobh:
                        set_opt(sbi->s_mount_opt, NOBH);
                        break;
+               case Opt_bh:
+                       clear_opt(sbi->s_mount_opt, NOBH);
+                       break;
                default:
                        printk (KERN_ERR
                                "EXT3-fs: Unrecognized mount option \"%s\" "
@@ -2611,7 +2656,7 @@ static ssize_t ext3_quota_write(struct super_block *sb, int type,
        struct buffer_head *bh;
        handle_t *handle = journal_current_handle();
 
-       mutex_lock(&inode->i_mutex);
+       mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
        while (towrite > 0) {
                tocopy = sb->s_blocksize - offset < towrite ?
                                sb->s_blocksize - offset : towrite;