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quota: explicitly set ->dq_op and ->s_qcop 

Only set the quota operation vectors if the filesystem actually supports
quota instead of doing it for all filesystems in alloc_super().

[Jan Kara: Export dquot_operations and vfs_quotactl_ops]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Christoph Hellwig 2010-05-19 07:16:44 -04:00 committed by Jan Kara
parent 307ae18a56
commit 123e9caf1e
7 changed files with 22 additions and 15 deletions
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6
fs/ext2/super.c
View File

@ -1065,6 +1065,12 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
sb->s_op = &ext2_sops;
sb->s_export_op = &ext2_export_ops;
sb->s_xattr = ext2_xattr_handlers;
#ifdef CONFIG_QUOTA
sb->dq_op = &dquot_operations;
sb->s_qcop = &vfs_quotactl_ops;
#endif
root = ext2_iget(sb, EXT2_ROOT_INO);
if (IS_ERR(root)) {
ret = PTR_ERR(root);

4
fs/jfs/super.c
View File

@ -481,6 +481,10 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
*/
sb->s_op = &jfs_super_operations;
sb->s_export_op = &jfs_export_operations;
#ifdef CONFIG_QUOTA
sb->dq_op = &dquot_operations;
sb->s_qcop = &vfs_quotactl_ops;
#endif
/*
* Initialize direct-mapping inode/address-space

3
fs/quota/dquot.c
View File

@ -1847,6 +1847,7 @@ const struct dquot_operations dquot_operations = {
.alloc_dquot = dquot_alloc,
.destroy_dquot = dquot_destroy,
};
EXPORT_SYMBOL(dquot_operations);
/*
* Generic helper for ->open on filesystems supporting disk quotas.
@ -2491,7 +2492,7 @@ const struct quotactl_ops vfs_quotactl_ops = {
.get_dqblk = vfs_get_dqblk,
.set_dqblk = vfs_set_dqblk
};
EXPORT_SYMBOL(vfs_quotactl_ops);
static int do_proc_dqstats(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)

3
fs/super.c
View File

@ -24,7 +24,6 @@
#include <linux/slab.h>
#include <linux/acct.h>
#include <linux/blkdev.h>
#include <linux/quotaops.h>
#include <linux/mount.h>
#include <linux/security.h>
#include <linux/writeback.h> /* for the emergency remount stuff */
@ -94,8 +93,6 @@ static struct super_block *alloc_super(struct file_system_type *type)
init_rwsem(&s->s_dquot.dqptr_sem);
init_waitqueue_head(&s->s_wait_unfrozen);
s->s_maxbytes = MAX_NON_LFS;
s->dq_op = sb_dquot_ops;
s->s_qcop = sb_quotactl_ops;
s->s_op = &default_op;
s->s_time_gran = 1000000000;
}

6
fs/udf/super.c
View File

@ -1948,7 +1948,11 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
/* Fill in the rest of the superblock */
sb->s_op = &udf_sb_ops;
sb->s_export_op = &udf_export_ops;
sb->dq_op = NULL;
#ifdef CONFIG_QUOTA
sb->s_qcop = &vfs_quotactl_ops;
sb->dq_op = NULL; /* &dquot_operations */
#endif
sb->s_dirt = 0;
sb->s_magic = UDF_SUPER_MAGIC;
sb->s_time_gran = 1000;

6
fs/ufs/super.c
View File

@ -1045,7 +1045,11 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
*/
sb->s_op = &ufs_super_ops;
sb->s_export_op = &ufs_export_ops;
sb->dq_op = NULL; /***/
#ifdef CONFIG_QUOTA
sb->s_qcop = &vfs_quotactl_ops;
sb->dq_op = NULL; /* &dquot_operations */
#endif
sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);

9
include/linux/quotaops.h
View File

@ -153,9 +153,6 @@ static inline unsigned sb_any_quota_active(struct super_block *sb)
extern const struct dquot_operations dquot_operations;
extern const struct quotactl_ops vfs_quotactl_ops;
#define sb_dquot_ops (&dquot_operations)
#define sb_quotactl_ops (&vfs_quotactl_ops)
#else
static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
@ -199,12 +196,6 @@ static inline int sb_any_quota_active(struct super_block *sb)
return 0;
}
/*
* NO-OP when quota not configured.
*/
#define sb_dquot_ops (NULL)
#define sb_quotactl_ops (NULL)
static inline void dquot_initialize(struct inode *inode)
{
}