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f2fs: make atomic/volatile operation exclusive 

atomic/volatile ioctl interfaces are exposed to user like other file
operation interface, it needs to make them getting exclusion against
to each other to avoid potential conflict among these operations
in concurrent scenario.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2016-05-09 19:56:33 +08:00 committed by Jaegeuk Kim
parent 7fb17fe44b
commit 0fac558b96
1 changed files with 16 additions and 0 deletions
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16
fs/f2fs/file.c
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@ -1363,6 +1363,8 @@ static int f2fs_ioc_start_atomic_write(struct file *filp)
if (ret)
return ret;
inode_lock(inode);
if (f2fs_is_atomic_file(inode))
goto out;
@ -1383,6 +1385,7 @@ static int f2fs_ioc_start_atomic_write(struct file *filp)
if (ret)
clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
out:
inode_unlock(inode);
mnt_drop_write_file(filp);
return ret;
}
@ -1399,6 +1402,8 @@ static int f2fs_ioc_commit_atomic_write(struct file *filp)
if (ret)
return ret;
inode_lock(inode);
if (f2fs_is_volatile_file(inode))
goto err_out;
@ -1413,6 +1418,7 @@ static int f2fs_ioc_commit_atomic_write(struct file *filp)
ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
err_out:
inode_unlock(inode);
mnt_drop_write_file(filp);
return ret;
}
@ -1429,6 +1435,8 @@ static int f2fs_ioc_start_volatile_write(struct file *filp)
if (ret)
return ret;
inode_lock(inode);
if (f2fs_is_volatile_file(inode))
goto out;
@ -1439,6 +1447,7 @@ static int f2fs_ioc_start_volatile_write(struct file *filp)
set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE);
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
out:
inode_unlock(inode);
mnt_drop_write_file(filp);
return ret;
}
@ -1455,6 +1464,8 @@ static int f2fs_ioc_release_volatile_write(struct file *filp)
if (ret)
return ret;
inode_lock(inode);
if (!f2fs_is_volatile_file(inode))
goto out;
@ -1465,6 +1476,7 @@ static int f2fs_ioc_release_volatile_write(struct file *filp)
ret = punch_hole(inode, 0, F2FS_BLKSIZE);
out:
inode_unlock(inode);
mnt_drop_write_file(filp);
return ret;
}
@ -1481,6 +1493,8 @@ static int f2fs_ioc_abort_volatile_write(struct file *filp)
if (ret)
return ret;
inode_lock(inode);
if (f2fs_is_atomic_file(inode))
drop_inmem_pages(inode);
if (f2fs_is_volatile_file(inode)) {
@ -1488,6 +1502,8 @@ static int f2fs_ioc_abort_volatile_write(struct file *filp)
ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
}
inode_unlock(inode);
mnt_drop_write_file(filp);
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
return ret;