knfsd: exportfs: add exportfs.h header

[linux-kernel-docs/linux-2.6.git] / fs / ext3 / super.c

diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 6e30629..4f84dc8 100644 (file)
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -29,12 +29,14 @@
 #include <linux/parser.h>
 #include <linux/smp_lock.h>
 #include <linux/buffer_head.h>
+#include <linux/exportfs.h>
 #include <linux/vfs.h>
 #include <linux/random.h>
 #include <linux/mount.h>
 #include <linux/namei.h>
 #include <linux/quotaops.h>
 #include <linux/seq_file.h>
+#include <linux/log2.h>
 
 #include <asm/uaccess.h>
 
@@ -459,6 +461,14 @@ static struct inode *ext3_alloc_inode(struct super_block *sb)
 
 static void ext3_destroy_inode(struct inode *inode)
 {
+       if (!list_empty(&(EXT3_I(inode)->i_orphan))) {
+               printk("EXT3 Inode %p: orphan list check failed!\n",
+                       EXT3_I(inode));
+               print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4,
+                               EXT3_I(inode), sizeof(struct ext3_inode_info),
+                               false);
+               dump_stack();
+       }
        kmem_cache_free(ext3_inode_cachep, EXT3_I(inode));
 }
 
@@ -1566,7 +1576,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
                sbi->s_inode_size = le16_to_cpu(es->s_inode_size);
                sbi->s_first_ino = le32_to_cpu(es->s_first_ino);
                if ((sbi->s_inode_size < EXT3_GOOD_OLD_INODE_SIZE) ||
-                   (sbi->s_inode_size & (sbi->s_inode_size - 1)) ||
+                   (!is_power_of_2(sbi->s_inode_size)) ||
                    (sbi->s_inode_size > blocksize)) {
                        printk (KERN_ERR
                                "EXT3-fs: unsupported inode size: %d\n",
@@ -2075,6 +2085,7 @@ static int ext3_create_journal(struct super_block * sb,
                               unsigned int journal_inum)
 {
        journal_t *journal;
+       int err;
 
        if (sb->s_flags & MS_RDONLY) {
                printk(KERN_ERR "EXT3-fs: readonly filesystem when trying to "
@@ -2082,13 +2093,15 @@ static int ext3_create_journal(struct super_block * sb,
                return -EROFS;
        }
 
-       if (!(journal = ext3_get_journal(sb, journal_inum)))
+       journal = ext3_get_journal(sb, journal_inum);
+       if (!journal)
                return -EINVAL;
 
        printk(KERN_INFO "EXT3-fs: creating new journal on inode %u\n",
               journal_inum);
 
-       if (journal_create(journal)) {
+       err = journal_create(journal);
+       if (err) {
                printk(KERN_ERR "EXT3-fs: error creating journal.\n");
                journal_destroy(journal);
                return -EIO;
@@ -2139,12 +2152,14 @@ static void ext3_mark_recovery_complete(struct super_block * sb,
 
        journal_lock_updates(journal);
        journal_flush(journal);
+       lock_super(sb);
        if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) &&
            sb->s_flags & MS_RDONLY) {
                EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
                sb->s_dirt = 0;
                ext3_commit_super(sb, es, 1);
        }
+       unlock_super(sb);
        journal_unlock_updates(journal);
 }
 
@@ -2333,7 +2348,13 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
                            (sbi->s_mount_state & EXT3_VALID_FS))
                                es->s_state = cpu_to_le16(sbi->s_mount_state);
 
+                       /*
+                        * We have to unlock super so that we can wait for
+                        * transactions.
+                        */
+                       unlock_super(sb);
                        ext3_mark_recovery_complete(sb, es);
+                       lock_super(sb);
                } else {
                        __le32 ret;
                        if ((ret = EXT3_HAS_RO_COMPAT_FEATURE(sb,
@@ -2406,19 +2427,19 @@ static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
        struct super_block *sb = dentry->d_sb;
        struct ext3_sb_info *sbi = EXT3_SB(sb);
        struct ext3_super_block *es = sbi->s_es;
-       ext3_fsblk_t overhead;
-       int i;
        u64 fsid;
 
-       if (test_opt (sb, MINIX_DF))
-               overhead = 0;
-       else {
-               unsigned long ngroups;
-               ngroups = EXT3_SB(sb)->s_groups_count;
+       if (test_opt(sb, MINIX_DF)) {
+               sbi->s_overhead_last = 0;
+       } else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) {
+               unsigned long ngroups = sbi->s_groups_count, i;
+               ext3_fsblk_t 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.
                 */
 
                /*
@@ -2442,18 +2463,23 @@ static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
                 * Every block group has an inode bitmap, a block
                 * bitmap, and an inode table.
                 */
-               overhead += (ngroups * (2 + EXT3_SB(sb)->s_itb_per_group));
+               overhead += ngroups * (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 = EXT3_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 = percpu_counter_sum(&sbi->s_freeblocks_counter);
+       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 = percpu_counter_sum(&sbi->s_freeinodes_counter);
+       es->s_free_inodes_count = cpu_to_le32(buf->f_ffree);
        buf->f_namelen = EXT3_NAME_LEN;
        fsid = le64_to_cpup((void *)es->s_uuid) ^
               le64_to_cpup((void *)es->s_uuid + sizeof(u64));