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authorMingming Cao <cmm@us.ibm.com>2006-06-23 02:05:41 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-23 07:43:06 -0700
commit0216bfcffe424a5473daa4da47440881b36c1f41 (patch)
tree80eaa49bfc644b070e57c251285048992ac6fafc /fs/ext2/super.c
parent3cbc564024d8f174202f023e8a2991782f6a9431 (diff)
[PATCH] percpu counter data type changes to suppport more than 2**31 ext3 free blocks counter
The percpu counter data type are changed in this set of patches to support more users like ext3 who need more than 32 bit to store the free blocks total in the filesystem. - Generic perpcu counters data type changes. The size of the global counter and local counter were explictly specified using s64 and s32. The global counter is changed from long to s64, while the local counter is changed from long to s32, so we could avoid doing 64 bit update in most cases. - Users of the percpu counters are updated to make use of the new percpu_counter_init() routine now taking an additional parameter to allow users to pass the initial value of the global counter. Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/ext2/super.c')
-rw-r--r--fs/ext2/super.c25
1 files changed, 13 insertions, 12 deletions
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index a6c4d6e02324..ee4ba759581e 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -834,9 +834,6 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
printk ("EXT2-fs: not enough memory\n");
goto failed_mount;
}
- percpu_counter_init(&sbi->s_freeblocks_counter);
- percpu_counter_init(&sbi->s_freeinodes_counter);
- percpu_counter_init(&sbi->s_dirs_counter);
bgl_lock_init(&sbi->s_blockgroup_lock);
sbi->s_debts = kmalloc(sbi->s_groups_count * sizeof(*sbi->s_debts),
GFP_KERNEL);
@@ -863,6 +860,13 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_gdb_count = db_count;
get_random_bytes(&sbi->s_next_generation, sizeof(u32));
spin_lock_init(&sbi->s_next_gen_lock);
+
+ percpu_counter_init(&sbi->s_freeblocks_counter,
+ ext2_count_free_blocks(sb));
+ percpu_counter_init(&sbi->s_freeinodes_counter,
+ ext2_count_free_inodes(sb));
+ percpu_counter_init(&sbi->s_dirs_counter,
+ ext2_count_dirs(sb));
/*
* set up enough so that it can read an inode
*/
@@ -874,24 +878,18 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
if (!sb->s_root) {
iput(root);
printk(KERN_ERR "EXT2-fs: get root inode failed\n");
- goto failed_mount2;
+ goto failed_mount3;
}
if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
dput(sb->s_root);
sb->s_root = NULL;
printk(KERN_ERR "EXT2-fs: corrupt root inode, run e2fsck\n");
- goto failed_mount2;
+ goto failed_mount3;
}
if (EXT2_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL))
ext2_warning(sb, __FUNCTION__,
"mounting ext3 filesystem as ext2");
ext2_setup_super (sb, es, sb->s_flags & MS_RDONLY);
- percpu_counter_mod(&sbi->s_freeblocks_counter,
- ext2_count_free_blocks(sb));
- percpu_counter_mod(&sbi->s_freeinodes_counter,
- ext2_count_free_inodes(sb));
- percpu_counter_mod(&sbi->s_dirs_counter,
- ext2_count_dirs(sb));
return 0;
cantfind_ext2:
@@ -899,7 +897,10 @@ cantfind_ext2:
printk("VFS: Can't find an ext2 filesystem on dev %s.\n",
sb->s_id);
goto failed_mount;
-
+failed_mount3:
+ percpu_counter_destroy(&sbi->s_freeblocks_counter);
+ percpu_counter_destroy(&sbi->s_freeinodes_counter);
+ percpu_counter_destroy(&sbi->s_dirs_counter);
failed_mount2:
for (i = 0; i < db_count; i++)
brelse(sbi->s_group_desc[i]);