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wrappers for ->i_mutex access

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parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested},
inode_foo(inode) being mutex_foo(&inode->i_mutex).

Please, use those for access to ->i_mutex; over the coming cycle
->i_mutex will become rwsem, with ->lookup() done with it held
only shared.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2016-01-22 15:40:57 -05:00
parent 57b8f112cf
commit 5955102c99
177 changed files with 908 additions and 883 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
fs/ext4/ext4.h
View File

@@ -2896,7 +2896,7 @@ do { \
static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize)
{
WARN_ON_ONCE(S_ISREG(inode->i_mode) &&
!mutex_is_locked(&inode->i_mutex));
!inode_is_locked(inode));
down_write(&EXT4_I(inode)->i_data_sem);
if (newsize > EXT4_I(inode)->i_disksize)
EXT4_I(inode)->i_disksize = newsize;

20
fs/ext4/extents.c
View File

@@ -4799,7 +4799,7 @@ static long ext4_zero_range(struct file *file, loff_t offset,
else
max_blocks -= lblk;
mutex_lock(&inode->i_mutex);
inode_lock(inode);
/*
* Indirect files do not support unwritten extnets
@@ -4902,7 +4902,7 @@ static long ext4_zero_range(struct file *file, loff_t offset,
out_dio:
ext4_inode_resume_unlocked_dio(inode);
out_mutex:
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
return ret;
}
@@ -4973,7 +4973,7 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
if (mode & FALLOC_FL_KEEP_SIZE)
flags |= EXT4_GET_BLOCKS_KEEP_SIZE;
mutex_lock(&inode->i_mutex);
inode_lock(inode);
/*
* We only support preallocation for extent-based files only
@@ -5006,7 +5006,7 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
EXT4_I(inode)->i_sync_tid);
}
out:
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
trace_ext4_fallocate_exit(inode, offset, max_blocks, ret);
return ret;
}
@@ -5492,7 +5492,7 @@ int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len)
return ret;
}
mutex_lock(&inode->i_mutex);
inode_lock(inode);
/*
* There is no need to overlap collapse range with EOF, in which case
* it is effectively a truncate operation
@@ -5587,7 +5587,7 @@ out_mmap:
up_write(&EXT4_I(inode)->i_mmap_sem);
ext4_inode_resume_unlocked_dio(inode);
out_mutex:
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
return ret;
}
@@ -5638,7 +5638,7 @@ int ext4_insert_range(struct inode *inode, loff_t offset, loff_t len)
return ret;
}
mutex_lock(&inode->i_mutex);
inode_lock(inode);
/* Currently just for extent based files */
if (!ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) {
ret = -EOPNOTSUPP;
@@ -5757,7 +5757,7 @@ out_mmap:
up_write(&EXT4_I(inode)->i_mmap_sem);
ext4_inode_resume_unlocked_dio(inode);
out_mutex:
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
return ret;
}
@@ -5792,8 +5792,8 @@ ext4_swap_extents(handle_t *handle, struct inode *inode1,
BUG_ON(!rwsem_is_locked(&EXT4_I(inode1)->i_data_sem));
BUG_ON(!rwsem_is_locked(&EXT4_I(inode2)->i_data_sem));
BUG_ON(!mutex_is_locked(&inode1->i_mutex));
BUG_ON(!mutex_is_locked(&inode2->i_mutex));
BUG_ON(!inode_is_locked(inode1));
BUG_ON(!inode_is_locked(inode2));
*erp = ext4_es_remove_extent(inode1, lblk1, count);
if (unlikely(*erp))

18
fs/ext4/file.c
View File

@@ -113,7 +113,7 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
ext4_unwritten_wait(inode);
}
mutex_lock(&inode->i_mutex);
inode_lock(inode);
ret = generic_write_checks(iocb, from);
if (ret <= 0)
goto out;
@@ -169,7 +169,7 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
}
ret = __generic_file_write_iter(iocb, from);
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
if (ret > 0) {
ssize_t err;
@@ -186,7 +186,7 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
return ret;
out:
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
if (aio_mutex)
mutex_unlock(aio_mutex);
return ret;
@@ -561,11 +561,11 @@ static loff_t ext4_seek_data(struct file *file, loff_t offset, loff_t maxsize)
int blkbits;
int ret = 0;
mutex_lock(&inode->i_mutex);
inode_lock(inode);
isize = i_size_read(inode);
if (offset >= isize) {
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
return -ENXIO;
}
@@ -613,7 +613,7 @@ static loff_t ext4_seek_data(struct file *file, loff_t offset, loff_t maxsize)
dataoff = (loff_t)last << blkbits;
} while (last <= end);
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
if (dataoff > isize)
return -ENXIO;
@@ -634,11 +634,11 @@ static loff_t ext4_seek_hole(struct file *file, loff_t offset, loff_t maxsize)
int blkbits;
int ret = 0;
mutex_lock(&inode->i_mutex);
inode_lock(inode);
isize = i_size_read(inode);
if (offset >= isize) {
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
return -ENXIO;
}
@@ -689,7 +689,7 @@ static loff_t ext4_seek_hole(struct file *file, loff_t offset, loff_t maxsize)
break;
} while (last <= end);
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
if (holeoff > isize)
holeoff = isize;

12
fs/ext4/inode.c
View File

@@ -3231,7 +3231,7 @@ static ssize_t ext4_ext_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
overwrite = *((int *)iocb->private);
if (overwrite)
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
/*
* We could direct write to holes and fallocate.
@@ -3331,7 +3331,7 @@ retake_lock:
inode_dio_end(inode);
/* take i_mutex locking again if we do a ovewrite dio */
if (overwrite)
mutex_lock(&inode->i_mutex);
inode_lock(inode);
return ret;
}
@@ -3653,7 +3653,7 @@ int ext4_update_disksize_before_punch(struct inode *inode, loff_t offset,
handle_t *handle;
loff_t size = i_size_read(inode);
WARN_ON(!mutex_is_locked(&inode->i_mutex));
WARN_ON(!inode_is_locked(inode));
if (offset > size || offset + len < size)
return 0;
@@ -3707,7 +3707,7 @@ int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length)
return ret;
}
mutex_lock(&inode->i_mutex);
inode_lock(inode);
/* No need to punch hole beyond i_size */
if (offset >= inode->i_size)
@@ -3809,7 +3809,7 @@ out_dio:
up_write(&EXT4_I(inode)->i_mmap_sem);
ext4_inode_resume_unlocked_dio(inode);
out_mutex:
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
return ret;
}
@@ -3879,7 +3879,7 @@ void ext4_truncate(struct inode *inode)
* have i_mutex locked because it's not necessary.
*/
if (!(inode->i_state & (I_NEW|I_FREEING)))
WARN_ON(!mutex_is_locked(&inode->i_mutex));
WARN_ON(!inode_is_locked(inode));
trace_ext4_truncate_enter(inode);
if (!ext4_can_truncate(inode))

20
fs/ext4/ioctl.c
View File

@@ -330,7 +330,7 @@ static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
return err;
err = -EPERM;
mutex_lock(&inode->i_mutex);
inode_lock(inode);
/* Is it quota file? Do not allow user to mess with it */
if (IS_NOQUOTA(inode))
goto out_unlock;
@@ -381,7 +381,7 @@ out_dirty:
out_stop:
ext4_journal_stop(handle);
out_unlock:
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
mnt_drop_write_file(filp);
return err;
}
@@ -464,9 +464,9 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
flags = ext4_mask_flags(inode->i_mode, flags);
mutex_lock(&inode->i_mutex);
inode_lock(inode);
err = ext4_ioctl_setflags(inode, flags);
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
mnt_drop_write_file(filp);
return err;
}
@@ -497,7 +497,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
goto setversion_out;
}
mutex_lock(&inode->i_mutex);
inode_lock(inode);
handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
if (IS_ERR(handle)) {
err = PTR_ERR(handle);
@@ -512,7 +512,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
ext4_journal_stop(handle);
unlock_out:
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
setversion_out:
mnt_drop_write_file(filp);
return err;
@@ -658,9 +658,9 @@ group_add_out:
* ext4_ext_swap_inode_data before we switch the
* inode format to prevent read.
*/
mutex_lock(&(inode->i_mutex));
inode_lock((inode));
err = ext4_ext_migrate(inode);
mutex_unlock(&(inode->i_mutex));
inode_unlock((inode));
mnt_drop_write_file(filp);
return err;
}
@@ -876,11 +876,11 @@ encryption_policy_out:
flags = ext4_xflags_to_iflags(fa.fsx_xflags);
flags = ext4_mask_flags(inode->i_mode, flags);
mutex_lock(&inode->i_mutex);
inode_lock(inode);
flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
(flags & EXT4_FL_XFLAG_VISIBLE);
err = ext4_ioctl_setflags(inode, flags);
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
mnt_drop_write_file(filp);
if (err)
return err;

4
fs/ext4/namei.c
View File

@@ -2753,7 +2753,7 @@ int ext4_orphan_add(handle_t *handle, struct inode *inode)
return 0;
WARN_ON_ONCE(!(inode->i_state & (I_NEW | I_FREEING)) &&
!mutex_is_locked(&inode->i_mutex));
!inode_is_locked(inode));
/*
* Exit early if inode already is on orphan list. This is a big speedup
* since we don't have to contend on the global s_orphan_lock.
@@ -2835,7 +2835,7 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode)
return 0;
WARN_ON_ONCE(!(inode->i_state & (I_NEW | I_FREEING)) &&
!mutex_is_locked(&inode->i_mutex));
!inode_is_locked(inode));
/* Do this quick check before taking global s_orphan_lock. */
if (list_empty(&ei->i_orphan))
return 0;

4
fs/ext4/super.c
View File

@@ -2286,10 +2286,10 @@ static void ext4_orphan_cleanup(struct super_block *sb,
__func__, inode->i_ino, inode->i_size);
jbd_debug(2, "truncating inode %lu to %lld bytes\n",
inode->i_ino, inode->i_size);
mutex_lock(&inode->i_mutex);
inode_lock(inode);
truncate_inode_pages(inode->i_mapping, inode->i_size);
ext4_truncate(inode);
mutex_unlock(&inode->i_mutex);
inode_unlock(inode);
nr_truncates++;
} else {
if (test_opt(sb, DEBUG))