[POWERPC] fsl_soc: add support for fsl_spi

[linux-2.6] / fs / ext3 / super.c

diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 69a59d4580e995575bfd72942651100d8d76644f..9537316a0714eeca51f97c67442ccc36bfa2c539 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>
 
@@ -488,7 +490,7 @@ static int init_inodecache(void)
                                             sizeof(struct ext3_inode_info),
                                             0, (SLAB_RECLAIM_ACCOUNT|
                                                SLAB_MEM_SPREAD),
-                                            init_once, NULL);
+                                            init_once);
        if (ext3_inode_cachep == NULL)
                return -ENOMEM;
        return 0;
@@ -1219,7 +1221,7 @@ static int ext3_check_descriptors (struct super_block * sb)
                        return 0;
                }
                if (le32_to_cpu(gdp->bg_inode_table) < first_block ||
-                   le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group >
+                   le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group - 1 >
                    last_block)
                {
                        ext3_error (sb, "ext3_check_descriptors",
@@ -1574,7 +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",
@@ -2083,6 +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 "
@@ -2090,13 +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;
@@ -2422,19 +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.
                 */
 
                /*
@@ -2458,18 +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));
@@ -2568,8 +2578,11 @@ static int ext3_release_dquot(struct dquot *dquot)
 
        handle = ext3_journal_start(dquot_to_inode(dquot),
                                        EXT3_QUOTA_DEL_BLOCKS(dquot->dq_sb));
-       if (IS_ERR(handle))
+       if (IS_ERR(handle)) {
+               /* Release dquot anyway to avoid endless cycle in dqput() */
+               dquot_release(dquot);
                return PTR_ERR(handle);
+       }
        ret = dquot_release(dquot);
        err = ext3_journal_stop(handle);
        if (!ret)
@@ -2702,6 +2715,12 @@ static ssize_t ext3_quota_write(struct super_block *sb, int type,
        struct buffer_head *bh;
        handle_t *handle = journal_current_handle();
 
+       if (!handle) {
+               printk(KERN_WARNING "EXT3-fs: Quota write (off=%Lu, len=%Lu)"
+                       " cancelled because transaction is not started.\n",
+                       (unsigned long long)off, (unsigned long long)len);
+               return -EIO;
+       }
        mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
        while (towrite > 0) {
                tocopy = sb->s_blocksize - offset < towrite ?