Messages in this thread Patch in this message | | | From | Chao Yu <> | Subject | [PATCH] f2fs: support FS_IOC_{GET,SET}FSLABEL | Date | Wed, 17 Jul 2019 17:06:11 +0800 |
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Support two generic fs ioctls FS_IOC_{GET,SET}FSLABEL, letting f2fs pass generic/492 testcase.
Signed-off-by: Chao Yu <yuchao0@huawei.com> --- fs/f2fs/f2fs.h | 3 ++ fs/f2fs/file.c | 78 ++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 81 insertions(+)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 17382da7f0bd..76d2e82f2519 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -417,6 +417,9 @@ static inline bool __has_cursum_space(struct f2fs_journal *journal, #define F2FS_IOC_PRECACHE_EXTENTS _IO(F2FS_IOCTL_MAGIC, 15) #define F2FS_IOC_RESIZE_FS _IOW(F2FS_IOCTL_MAGIC, 16, __u64) +#define F2FS_IOC_GET_VOLUME_NAME FS_IOC_GETFSLABEL +#define F2FS_IOC_SET_VOLUME_NAME FS_IOC_SETFSLABEL + #define F2FS_IOC_SET_ENCRYPTION_POLICY FS_IOC_SET_ENCRYPTION_POLICY #define F2FS_IOC_GET_ENCRYPTION_POLICY FS_IOC_GET_ENCRYPTION_POLICY #define F2FS_IOC_GET_ENCRYPTION_PWSALT FS_IOC_GET_ENCRYPTION_PWSALT diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 3e58a6f697dd..7ca545874060 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -20,6 +20,7 @@ #include <linux/uio.h> #include <linux/uuid.h> #include <linux/file.h> +#include <linux/nls.h> #include "f2fs.h" #include "node.h" @@ -3060,6 +3061,77 @@ static int f2fs_ioc_resize_fs(struct file *filp, unsigned long arg) return ret; } +static int f2fs_get_volume_name(struct file *filp, unsigned long arg) +{ + struct inode *inode = file_inode(filp); + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + char *vbuf; + int count; + int err = 0; + + vbuf = f2fs_kzalloc(sbi, MAX_VOLUME_NAME, GFP_KERNEL); + if (!vbuf) + return -ENOMEM; + + down_read(&sbi->sb_lock); + count = utf16s_to_utf8s(sbi->raw_super->volume_name, + sizeof(sbi->raw_super->volume_name), + UTF16_LITTLE_ENDIAN, vbuf, MAX_VOLUME_NAME); + up_read(&sbi->sb_lock); + + if (copy_to_user((char __user *)arg, vbuf, + min(FSLABEL_MAX, count))) + err = -EFAULT; + + kvfree(vbuf); + return err; +} + +static int f2fs_set_volume_name(struct file *filp, unsigned long arg) +{ + struct inode *inode = file_inode(filp); + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + char *vbuf; + int len; + int err = 0; + + vbuf = f2fs_kzalloc(sbi, MAX_VOLUME_NAME, GFP_KERNEL); + if (!vbuf) + return -ENOMEM; + + if (copy_from_user(vbuf, (char __user *)arg, FSLABEL_MAX)) { + err = -EFAULT; + goto out; + } + + len = strnlen(vbuf, FSLABEL_MAX); + if (len > FSLABEL_MAX - 1) { + err = -EINVAL; + goto out; + } + + err = mnt_want_write_file(filp); + if (err) + goto out; + + down_write(&sbi->sb_lock); + + memset(sbi->raw_super->volume_name, 0, + sizeof(sbi->raw_super->volume_name)); + utf8s_to_utf16s(vbuf, MAX_VOLUME_NAME, UTF16_LITTLE_ENDIAN, + sbi->raw_super->volume_name, + sizeof(sbi->raw_super->volume_name)); + + err = f2fs_commit_super(sbi, false); + + up_write(&sbi->sb_lock); + + mnt_drop_write_file(filp); +out: + kvfree(vbuf); + return err; +} + long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp))))) @@ -3118,6 +3190,10 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) return f2fs_ioc_precache_extents(filp, arg); case F2FS_IOC_RESIZE_FS: return f2fs_ioc_resize_fs(filp, arg); + case F2FS_IOC_GET_VOLUME_NAME: + return f2fs_get_volume_name(filp, arg); + case F2FS_IOC_SET_VOLUME_NAME: + return f2fs_set_volume_name(filp, arg); default: return -ENOTTY; } @@ -3232,6 +3308,8 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) case F2FS_IOC_SET_PIN_FILE: case F2FS_IOC_PRECACHE_EXTENTS: case F2FS_IOC_RESIZE_FS: + case F2FS_IOC_GET_VOLUME_NAME: + case F2FS_IOC_SET_VOLUME_NAME: break; default: return -ENOIOCTLCMD; -- 2.18.0.rc1
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