diff options
Diffstat (limited to 'fs/ext2/super.c')
| -rw-r--r-- | fs/ext2/super.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/fs/ext2/super.c b/fs/ext2/super.c index 5de5061eb331..639a32c3c9c1 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; @@ -579,7 +580,7 @@ static int ext2_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) { ext2_error (sb, "ext2_check_descriptors", @@ -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)); |