Commit 0abd675e authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim

f2fs: support plain user/group quota

This patch adds to support plain user/group quota.

Change Note by Jaegeuk Kim.

- Use f2fs page cache for quota files in order to consider garbage collection.
  so, quota files are not tolerable for sudden power-cuts, so user needs to do
  quotacheck.

- setattr() calls dquot_transfer which will transfer inode->i_blocks.
  We can't reclaim that during f2fs_evict_inode(). So, we need to count
  node blocks as well in order to match i_blocks with dquot's space.

  Note that, Chao wrote a patch to count inode->i_blocks without inode block.
  (f2fs: don't count inode block in in-memory inode.i_blocks)

- in f2fs_remount, we need to make RW in prior to dquot_resume.

- handle fault_injection case during f2fs_quota_off_umount

- TODO: Project quota
Signed-off-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent d29460e5
......@@ -162,6 +162,8 @@ mode=%s Control block allocation mode which supports "adaptive"
writes towards main area.
io_bits=%u Set the bit size of write IO requests. It should be set
with "mode=lfs".
usrquota Enable plain user disk quota accounting.
grpquota Enable plain group disk quota accounting.
================================================================================
DEBUGFS ENTRIES
......
......@@ -491,14 +491,15 @@ void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr)
int reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
int err;
if (!count)
return 0;
if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
return -EPERM;
if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count)))
return -ENOSPC;
if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
return err;
trace_f2fs_reserve_new_blocks(dn->inode, dn->nid,
dn->ofs_in_node, count);
......@@ -749,6 +750,7 @@ static int __allocate_data_block(struct dnode_of_data *dn)
struct node_info ni;
pgoff_t fofs;
blkcnt_t count = 1;
int err;
if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
return -EPERM;
......@@ -757,8 +759,8 @@ static int __allocate_data_block(struct dnode_of_data *dn)
if (dn->data_blkaddr == NEW_ADDR)
goto alloc;
if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count)))
return -ENOSPC;
if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
return err;
alloc:
get_node_info(sbi, dn->nid, &ni);
......
......@@ -22,6 +22,7 @@
#include <linux/vmalloc.h>
#include <linux/bio.h>
#include <linux/blkdev.h>
#include <linux/quotaops.h>
#ifdef CONFIG_F2FS_FS_ENCRYPTION
#include <linux/fscrypt_supp.h>
#else
......@@ -88,6 +89,8 @@ extern char *fault_name[FAULT_MAX];
#define F2FS_MOUNT_FAULT_INJECTION 0x00010000
#define F2FS_MOUNT_ADAPTIVE 0x00020000
#define F2FS_MOUNT_LFS 0x00040000
#define F2FS_MOUNT_USRQUOTA 0x00080000
#define F2FS_MOUNT_GRPQUOTA 0x00100000
#define clear_opt(sbi, option) ((sbi)->mount_opt.opt &= ~F2FS_MOUNT_##option)
#define set_opt(sbi, option) ((sbi)->mount_opt.opt |= F2FS_MOUNT_##option)
......@@ -521,6 +524,12 @@ struct f2fs_inode_info {
nid_t i_xattr_nid; /* node id that contains xattrs */
loff_t last_disk_size; /* lastly written file size */
#ifdef CONFIG_QUOTA
struct dquot *i_dquot[MAXQUOTAS];
/* quota space reservation, managed internally by quota code */
qsize_t i_reserved_quota;
#endif
struct list_head dirty_list; /* dirty list for dirs and files */
struct list_head gdirty_list; /* linked in global dirty list */
struct list_head inmem_pages; /* inmemory pages managed by f2fs */
......@@ -1376,17 +1385,23 @@ static inline bool f2fs_has_xattr_block(unsigned int ofs)
return ofs == XATTR_NODE_OFFSET;
}
static inline void f2fs_i_blocks_write(struct inode *, block_t, bool);
static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
static inline void f2fs_i_blocks_write(struct inode *, block_t, bool, bool);
static inline int inc_valid_block_count(struct f2fs_sb_info *sbi,
struct inode *inode, blkcnt_t *count)
{
blkcnt_t diff;
blkcnt_t diff = 0, release = 0;
block_t avail_user_block_count;
int ret;
ret = dquot_reserve_block(inode, *count);
if (ret)
return ret;
#ifdef CONFIG_F2FS_FAULT_INJECTION
if (time_to_inject(sbi, FAULT_BLOCK)) {
f2fs_show_injection_info(FAULT_BLOCK);
return false;
release = *count;
goto enospc;
}
#endif
/*
......@@ -1401,17 +1416,24 @@ static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
if (unlikely(sbi->total_valid_block_count > avail_user_block_count)) {
diff = sbi->total_valid_block_count - avail_user_block_count;
*count -= diff;
release = diff;
sbi->total_valid_block_count = avail_user_block_count;
if (!*count) {
spin_unlock(&sbi->stat_lock);
percpu_counter_sub(&sbi->alloc_valid_block_count, diff);
return false;
goto enospc;
}
}
spin_unlock(&sbi->stat_lock);
f2fs_i_blocks_write(inode, *count, true);
return true;
if (release)
dquot_release_reservation_block(inode, release);
f2fs_i_blocks_write(inode, *count, true, true);
return 0;
enospc:
dquot_release_reservation_block(inode, release);
return -ENOSPC;
}
static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
......@@ -1425,7 +1447,7 @@ static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
f2fs_bug_on(sbi, inode->i_blocks < sectors);
sbi->total_valid_block_count -= (block_t)count;
spin_unlock(&sbi->stat_lock);
f2fs_i_blocks_write(inode, count, false);
f2fs_i_blocks_write(inode, count, false, true);
}
static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
......@@ -1554,11 +1576,18 @@ static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
}
static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
static inline int inc_valid_node_count(struct f2fs_sb_info *sbi,
struct inode *inode, bool is_inode)
{
block_t valid_block_count;
unsigned int valid_node_count;
bool quota = inode && !is_inode;
if (quota) {
int ret = dquot_reserve_block(inode, 1);
if (ret)
return ret;
}
spin_lock(&sbi->stat_lock);
......@@ -1566,28 +1595,33 @@ static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
if (unlikely(valid_block_count + sbi->reserved_blocks >
sbi->user_block_count)) {
spin_unlock(&sbi->stat_lock);
return false;
goto enospc;
}
valid_node_count = sbi->total_valid_node_count + 1;
if (unlikely(valid_node_count > sbi->total_node_count)) {
spin_unlock(&sbi->stat_lock);
return false;
goto enospc;
}
sbi->total_valid_node_count++;
sbi->total_valid_block_count++;
spin_unlock(&sbi->stat_lock);
if (inode) {
if (is_inode)
f2fs_mark_inode_dirty_sync(inode, true);
else
f2fs_i_blocks_write(inode, 1, true);
f2fs_i_blocks_write(inode, 1, true, true);
}
sbi->total_valid_node_count++;
sbi->total_valid_block_count++;
spin_unlock(&sbi->stat_lock);
percpu_counter_inc(&sbi->alloc_valid_block_count);
return true;
return 0;
enospc:
if (quota)
dquot_release_reservation_block(inode, 1);
return -ENOSPC;
}
static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
......@@ -1599,12 +1633,13 @@ static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
f2fs_bug_on(sbi, !sbi->total_valid_node_count);
f2fs_bug_on(sbi, !is_inode && !inode->i_blocks);
if (!is_inode)
f2fs_i_blocks_write(inode, 1, false);
sbi->total_valid_node_count--;
sbi->total_valid_block_count--;
spin_unlock(&sbi->stat_lock);
if (!is_inode)
f2fs_i_blocks_write(inode, 1, false, true);
}
static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
......@@ -1879,14 +1914,21 @@ static inline void f2fs_i_links_write(struct inode *inode, bool inc)
}
static inline void f2fs_i_blocks_write(struct inode *inode,
block_t diff, bool add)
block_t diff, bool add, bool claim)
{
bool clean = !is_inode_flag_set(inode, FI_DIRTY_INODE);
bool recover = is_inode_flag_set(inode, FI_AUTO_RECOVER);
blkcnt_t sectors = diff << F2FS_LOG_SECTORS_PER_BLOCK;
inode->i_blocks = add ? inode->i_blocks + sectors :
inode->i_blocks - sectors;
/* add = 1, claim = 1 should be dquot_reserve_block in pair */
if (add) {
if (claim)
dquot_claim_block(inode, diff);
else
dquot_alloc_block_nofail(inode, diff);
} else {
dquot_free_block(inode, diff);
}
f2fs_mark_inode_dirty_sync(inode, true);
if (clean || recover)
set_inode_flag(inode, FI_AUTO_RECOVER);
......
......@@ -442,11 +442,10 @@ static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
static int f2fs_file_open(struct inode *inode, struct file *filp)
{
int ret = generic_file_open(inode, filp);
struct dentry *dir;
if (!ret && f2fs_encrypted_inode(inode)) {
ret = fscrypt_get_encryption_info(inode);
if (f2fs_encrypted_inode(inode)) {
int ret = fscrypt_get_encryption_info(inode);
if (ret)
return -EACCES;
if (!fscrypt_has_encryption_key(inode))
......@@ -459,7 +458,7 @@ static int f2fs_file_open(struct inode *inode, struct file *filp)
return -EPERM;
}
dput(dir);
return ret;
return dquot_file_open(inode, filp);
}
int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
......@@ -710,6 +709,20 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
if (err)
return err;
if (is_quota_modification(inode, attr)) {
err = dquot_initialize(inode);
if (err)
return err;
}
if ((attr->ia_valid & ATTR_UID &&
!uid_eq(attr->ia_uid, inode->i_uid)) ||
(attr->ia_valid & ATTR_GID &&
!gid_eq(attr->ia_gid, inode->i_gid))) {
err = dquot_transfer(inode, attr);
if (err)
return err;
}
if (attr->ia_valid & ATTR_SIZE) {
if (f2fs_encrypted_inode(inode)) {
err = fscrypt_get_encryption_info(inode);
......@@ -996,9 +1009,9 @@ static int __clone_blkaddrs(struct inode *src_inode, struct inode *dst_inode,
if (do_replace[i]) {
f2fs_i_blocks_write(src_inode,
1, false);
1, false, false);
f2fs_i_blocks_write(dst_inode,
1, true);
1, true, false);
f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
blkaddr[i], ni.version, true, false);
......@@ -1523,6 +1536,13 @@ static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
inode_lock(inode);
/* Is it quota file? Do not allow user to mess with it */
if (IS_NOQUOTA(inode)) {
inode_unlock(inode);
ret = -EPERM;
goto unlock_out;
}
flags = f2fs_mask_flags(inode->i_mode, flags);
oldflags = fi->i_flags;
......@@ -1542,7 +1562,7 @@ static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
inode->i_ctime = current_time(inode);
f2fs_set_inode_flags(inode);
f2fs_mark_inode_dirty_sync(inode, false);
unlock_out:
inode_unlock(inode);
out:
mnt_drop_write_file(filp);
......
......@@ -373,6 +373,8 @@ void f2fs_evict_inode(struct inode *inode)
if (inode->i_nlink || is_bad_inode(inode))
goto no_delete;
dquot_initialize(inode);
remove_ino_entry(sbi, inode->i_ino, APPEND_INO);
remove_ino_entry(sbi, inode->i_ino, UPDATE_INO);
......@@ -405,8 +407,11 @@ void f2fs_evict_inode(struct inode *inode)
if (err)
update_inode_page(inode);
dquot_free_inode(inode);
sb_end_intwrite(inode->i_sb);
no_delete:
dquot_drop(inode);
stat_dec_inline_xattr(inode);
stat_dec_inline_dir(inode);
stat_dec_inline_inode(inode);
......
......@@ -15,6 +15,7 @@
#include <linux/ctype.h>
#include <linux/dcache.h>
#include <linux/namei.h>
#include <linux/quotaops.h>
#include "f2fs.h"
#include "node.h"
......@@ -42,6 +43,8 @@ static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
}
f2fs_unlock_op(sbi);
nid_free = true;
inode_init_owner(inode, dir, mode);
inode->i_ino = ino;
......@@ -52,10 +55,17 @@ static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
err = insert_inode_locked(inode);
if (err) {
err = -EINVAL;
nid_free = true;
goto fail;
}
err = dquot_initialize(inode);
if (err)
goto fail_drop;
err = dquot_alloc_inode(inode);
if (err)
goto fail_drop;
/* If the directory encrypted, then we should encrypt the inode. */
if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode))
f2fs_set_encrypted_inode(inode);
......@@ -85,6 +95,16 @@ static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
set_inode_flag(inode, FI_FREE_NID);
iput(inode);
return ERR_PTR(err);
fail_drop:
trace_f2fs_new_inode(inode, err);
dquot_drop(inode);
inode->i_flags |= S_NOQUOTA;
if (nid_free)
set_inode_flag(inode, FI_FREE_NID);
clear_nlink(inode);
unlock_new_inode(inode);
iput(inode);
return ERR_PTR(err);
}
static int is_multimedia_file(const unsigned char *s, const char *sub)
......@@ -136,6 +156,10 @@ static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
nid_t ino = 0;
int err;
err = dquot_initialize(dir);
if (err)
return err;
inode = f2fs_new_inode(dir, mode);
if (IS_ERR(inode))
return PTR_ERR(inode);
......@@ -180,6 +204,10 @@ static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
!fscrypt_has_permitted_context(dir, inode))
return -EPERM;
err = dquot_initialize(dir);
if (err)
return err;
f2fs_balance_fs(sbi, true);
inode->i_ctime = current_time(inode);
......@@ -347,6 +375,10 @@ static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
trace_f2fs_unlink_enter(dir, dentry);
err = dquot_initialize(dir);
if (err)
return err;
de = f2fs_find_entry(dir, &dentry->d_name, &page);
if (!de) {
if (IS_ERR(page))
......@@ -413,6 +445,10 @@ static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
if (disk_link.len > dir->i_sb->s_blocksize)
return -ENAMETOOLONG;
err = dquot_initialize(dir);
if (err)
return err;
inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
if (IS_ERR(inode))
return PTR_ERR(inode);
......@@ -500,6 +536,10 @@ static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
struct inode *inode;
int err;
err = dquot_initialize(dir);
if (err)
return err;
inode = f2fs_new_inode(dir, S_IFDIR | mode);
if (IS_ERR(inode))
return PTR_ERR(inode);
......@@ -548,6 +588,10 @@ static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
struct inode *inode;
int err = 0;
err = dquot_initialize(dir);
if (err)
return err;
inode = f2fs_new_inode(dir, mode);
if (IS_ERR(inode))
return PTR_ERR(inode);
......@@ -583,6 +627,10 @@ static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
struct inode *inode;
int err;
err = dquot_initialize(dir);
if (err)
return err;
inode = f2fs_new_inode(dir, mode);
if (IS_ERR(inode))
return PTR_ERR(inode);
......@@ -676,6 +724,14 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
goto out;
}
err = dquot_initialize(old_dir);
if (err)
goto out;
err = dquot_initialize(new_dir);
if (err)
goto out;
old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
if (!old_entry) {
if (IS_ERR(old_page))
......@@ -856,6 +912,14 @@ static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
!fscrypt_has_permitted_context(old_dir, new_inode)))
return -EPERM;
err = dquot_initialize(old_dir);
if (err)
goto out;
err = dquot_initialize(new_dir);
if (err)
goto out;
old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
if (!old_entry) {
if (IS_ERR(old_page))
......
......@@ -1040,10 +1040,9 @@ struct page *new_node_page(struct dnode_of_data *dn,
if (!page)
return ERR_PTR(-ENOMEM);
if (unlikely(!inc_valid_node_count(sbi, dn->inode, !ofs))) {
err = -ENOSPC;
if (unlikely((err = inc_valid_node_count(sbi, dn->inode, !ofs))))
goto fail;
}
#ifdef CONFIG_F2FS_CHECK_FS
get_node_info(sbi, dn->nid, &new_ni);
f2fs_bug_on(sbi, new_ni.blk_addr != NULL_ADDR);
......@@ -2210,7 +2209,7 @@ int recover_xattr_data(struct inode *inode, struct page *page, block_t blkaddr)
/* 2: update xattr nid in inode */
remove_free_nid(sbi, new_xnid);
f2fs_i_xnid_write(inode, new_xnid);
if (unlikely(!inc_valid_node_count(sbi, inode, false)))
if (unlikely(inc_valid_node_count(sbi, inode, false)))
f2fs_bug_on(sbi, 1);
update_inode_page(inode);
......@@ -2268,7 +2267,7 @@ int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page)
new_ni = old_ni;
new_ni.ino = ino;
if (unlikely(!inc_valid_node_count(sbi, NULL, true)))
if (unlikely(inc_valid_node_count(sbi, NULL, true)))
WARN_ON(1);
set_node_addr(sbi, &new_ni, NEW_ADDR, false);
inc_valid_inode_count(sbi);
......
......@@ -22,6 +22,7 @@
#include <linux/random.h>
#include <linux/exportfs.h>
#include <linux/blkdev.h>
#include <linux/quotaops.h>
#include <linux/f2fs_fs.h>
#include <linux/sysfs.h>
......@@ -106,6 +107,8 @@ enum {
Opt_fault_injection,
Opt_lazytime,
Opt_nolazytime,
Opt_usrquota,
Opt_grpquota,
Opt_err,
};
......@@ -141,6 +144,8 @@ static match_table_t f2fs_tokens = {
{Opt_fault_injection, "fault_injection=%u"},
{Opt_lazytime, "lazytime"},
{Opt_nolazytime, "nolazytime"},
{Opt_usrquota, "usrquota"},
{Opt_grpquota, "grpquota"},
{Opt_err, NULL},
};
......@@ -380,6 +385,20 @@ static int parse_options(struct super_block *sb, char *options)
case Opt_nolazytime:
sb->s_flags &= ~MS_LAZYTIME;
break;
#ifdef CONFIG_QUOTA
case Opt_usrquota:
set_opt(sbi, USRQUOTA);
break;
case Opt_grpquota:
set_opt(sbi, GRPQUOTA);
break;
#else
case Opt_usrquota:
case Opt_grpquota:
f2fs_msg(sb, KERN_INFO,
"quota operations not supported");
break;
#endif
default:
f2fs_msg(sb, KERN_ERR,
"Unrecognized mount option \"%s\" or missing value",
......@@ -421,6 +440,10 @@ static struct inode *f2fs_alloc_inode(struct super_block *sb)
init_rwsem(&fi->dio_rwsem[WRITE]);
init_rwsem(&fi->i_mmap_sem);
#ifdef CONFIG_QUOTA
memset(&fi->i_dquot, 0, sizeof(fi->i_dquot));
fi->i_reserved_quota = 0;
#endif
/* Will be used by directory only */
fi->i_dir_level = F2FS_SB(sb)->dir_level;
return &fi->vfs_inode;
......@@ -561,11 +584,14 @@ static void destroy_device_list(struct f2fs_sb_info *sbi)
kfree(sbi->devs);
}
static void f2fs_quota_off_umount(struct super_block *sb);
static void f2fs_put_super(struct super_block *sb)
{
struct f2fs_sb_info *sbi = F2FS_SB(sb);
int i;
f2fs_quota_off_umount(sb);
/* prevent remaining shrinker jobs */
mutex_lock(&sbi->umount_mutex);
......@@ -782,6 +808,12 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
seq_printf(seq, ",fault_injection=%u",
sbi->fault_info.inject_rate);
#endif
#ifdef CONFIG_QUOTA
if (test_opt(sbi, USRQUOTA))
seq_puts(seq, ",usrquota");
if (test_opt(sbi, GRPQUOTA))
seq_puts(seq, ",grpquota");
#endif
return 0;
}
......@@ -822,6 +854,7 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
{
struct f2fs_sb_info *sbi = F2FS_SB(sb);
struct f2fs_mount_info org_mount_opt;
unsigned long old_sb_flags;
int err, active_logs;
bool need_restart_gc = false;
bool need_stop_gc = false;
......@@ -835,6 +868,7 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
* need to restore them.
*/
org_mount_opt = sbi->mount_opt;
old_sb_flags = sb->s_flags;
active_logs = sbi->active_logs;
/* recover superblocks we couldn't write due to previous RO mount */
......@@ -860,6 +894,16 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
if (f2fs_readonly(sb) && (*flags & MS_RDONLY))
goto skip;
if (!f2fs_readonly(sb) && (*flags & MS_RDONLY)) {
err = dquot_suspend(sb, -1);
if (err < 0)
goto restore_opts;
} else {
/* dquot_resume needs RW */
sb->s_flags &= ~MS_RDONLY;
dquot_resume(sb, -1);
}
/* disallow enable/disable extent_cache dynamically */
if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
err = -EINVAL;
......@@ -924,12 +968,237 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
restore_opts:
sbi->mount_opt = org_mount_opt;
sbi->active_logs = active_logs;
sb->s_flags = old_sb_flags;
#ifdef CONFIG_F2FS_FAULT_INJECTION
sbi->fault_info = ffi;
#endif
return err;
}
#ifdef CONFIG_QUOTA
/* Read data from quotafile */
static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
size_t len, loff_t off)
{
struct inode *inode = sb_dqopt(sb)->files[type];
struct address_space *mapping = inode->i_mapping;
block_t blkidx = F2FS_BYTES_TO_BLK(off);
int offset = off & (sb->s_blocksize - 1);
int tocopy;
size_t toread;
loff_t i_size = i_size_read(inode);
struct page *page;
char *kaddr;
if (off > i_size)
return 0;
if (off + len > i_size)
len = i_size - off;
toread = len;
while (toread > 0) {
tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
repeat:
page = read_mapping_page(mapping, blkidx, NULL);
if (IS_ERR(page))
return PTR_ERR(page);
lock_page(page);
if (unlikely(page->mapping != mapping)) {
f2fs_put_page(page, 1);
goto repeat;
}
if (unlikely(!PageUptodate(page))) {
f2fs_put_page(page, 1);
return -EIO;
}
kaddr = kmap_atomic(page);
memcpy(data, kaddr + offset, tocopy);
kunmap_atomic(kaddr);
f2fs_put_page(page, 1);
offset = 0;
toread -= tocopy;
data += tocopy;
blkidx++;
}
return len;
}
/* Write to quotafile */
static ssize_t f2fs_quota_write(struct super_block *sb, int type,
const char *data, size_t len, loff_t off)
{
struct inode *inode = sb_dqopt(sb)->files[type];
struct address_space *mapping = inode->i_mapping;
const struct address_space_operations *a_ops = mapping->a_ops;
int offset = off & (sb->s_blocksize - 1);
size_t towrite = len;
struct page *page;
char *kaddr;
int err = 0;
int tocopy;
while (towrite > 0) {
tocopy = min_t(unsigned long, sb->s_blocksize - offset,
towrite);
err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
&page, NULL);
if (unlikely(err))
break;
kaddr = kmap_atomic(page);
memcpy(kaddr + offset, data, tocopy);
kunmap_atomic(kaddr);
flush_dcache_page(page);
a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
page, NULL);
offset = 0;
towrite -= tocopy;
off += tocopy;
data += tocopy;
cond_resched();
}
if (len == towrite)
return err;
inode->i_version++;
inode->i_mtime = inode->i_ctime = current_time(inode);
f2fs_mark_inode_dirty_sync(inode, false);
return len - towrite;
}
static struct dquot **f2fs_get_dquots(struct inode *inode)
{
return F2FS_I(inode)->i_dquot;
}
static qsize_t *f2fs_get_reserved_space(struct inode *inode)
{
return &F2FS_I(inode)->i_reserved_quota;
}
static int f2fs_quota_sync(struct super_block *sb, int type)
{
struct quota_info *dqopt = sb_dqopt(sb);
int cnt;
int ret;
ret = dquot_writeback_dquots(sb, type);
if (ret)
return ret;
/*
* Now when everything is written we can discard the pagecache so
* that userspace sees the changes.
*/
for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
if (type != -1 && cnt != type)
continue;
if (!sb_has_quota_active(sb, cnt))
continue;
ret = filemap_write_and_wait(dqopt->files[cnt]->i_mapping);
if (ret)
return ret;
inode_lock(dqopt->files[cnt]);
truncate_inode_pages(&dqopt->files[cnt]->i_data, 0);
inode_unlock(dqopt->files[cnt]);
}
return 0;
}
static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
const struct path *path)
{
struct inode *inode;
int err;
err = f2fs_quota_sync(sb, -1);
if (err)
return err;
err = dquot_quota_on(sb, type, format_id, path);
if (err)
return err;
inode = d_inode(path->dentry);
inode_lock(inode);
F2FS_I(inode)->i_flags |= FS_NOATIME_FL | FS_IMMUTABLE_FL;
inode_set_flags(inode, S_NOATIME | S_IMMUTABLE,
S_NOATIME | S_IMMUTABLE);
inode_unlock(inode);
f2fs_mark_inode_dirty_sync(inode, false);
return 0;
}
static int f2fs_quota_off(struct super_block *sb, int type)
{
struct inode *inode = sb_dqopt(sb)->files[type];
int err;
if (!inode || !igrab(inode))
return dquot_quota_off(sb, type);
f2fs_quota_sync(sb, -1);
err = dquot_quota_off(sb, type);
if (err)
goto out_put;
inode_lock(inode);
F2FS_I(inode)->i_flags &= ~(FS_NOATIME_FL | FS_IMMUTABLE_FL);
inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE);
inode_unlock(inode);
f2fs_mark_inode_dirty_sync(inode, false);
out_put:
iput(inode);
return err;
}
static void f2fs_quota_off_umount(struct super_block *sb)
{
int type;
for (type = 0; type < MAXQUOTAS; type++)
f2fs_quota_off(sb, type);
}
static const struct dquot_operations f2fs_quota_operations = {
.get_reserved_space = f2fs_get_reserved_space,
.write_dquot = dquot_commit,
.acquire_dquot = dquot_acquire,
.release_dquot = dquot_release,
.mark_dirty = dquot_mark_dquot_dirty,
.write_info = dquot_commit_info,
.alloc_dquot = dquot_alloc,
.destroy_dquot = dquot_destroy,
.get_next_id = dquot_get_next_id,
};
static const struct quotactl_ops f2fs_quotactl_ops = {
.quota_on = f2fs_quota_on,
.quota_off = f2fs_quota_off,
.quota_sync = f2fs_quota_sync,
.get_state = dquot_get_state,
.set_info = dquot_set_dqinfo,
.get_dqblk = dquot_get_dqblk,
.set_dqblk = dquot_set_dqblk,
.get_nextdqblk = dquot_get_next_dqblk,
};
#else
static inline void f2fs_quota_off_umount(struct super_block *sb)
{
}
#endif
static struct super_operations f2fs_sops = {
.alloc_inode = f2fs_alloc_inode,
.drop_inode = f2fs_drop_inode,
......@@ -937,6 +1206,11 @@ static struct super_operations f2fs_sops = {
.write_inode = f2fs_write_inode,
.dirty_inode = f2fs_dirty_inode,
.show_options = f2fs_show_options,
#ifdef CONFIG_QUOTA
.quota_read = f2fs_quota_read,
.quota_write = f2fs_quota_write,
.get_dquots = f2fs_get_dquots,
#endif
.evict_inode = f2fs_evict_inode,
.put_super = f2fs_put_super,
.sync_fs = f2fs_sync_fs,
......@@ -1679,6 +1953,12 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_max_links = F2FS_LINK_MAX;
get_random_bytes(&sbi->s_next_generation, sizeof(u32));
#ifdef CONFIG_QUOTA
sb->dq_op = &f2fs_quota_operations;
sb->s_qcop = &f2fs_quotactl_ops;
sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
#endif
sb->s_op = &f2fs_sops;
sb->s_cop = &f2fs_cryptops;
sb->s_xattr = f2fs_xattr_handlers;
......
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