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| author | Amir Goldstein <amir73il@gmail.com> | 2019-11-16 19:14:41 +0300 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2020-01-24 11:46:45 +0300 |
| commit | 0f831ec85eda1ae27490baba106aba632c1d8e94 (patch) | |
| tree | f97b25b2abf25f78fb98a3763dee228667fd8665 /fs/overlayfs/overlayfs.h | |
| parent | 94375f9d5103c2eb2f905381993a2fb70c297364 (diff) | |
| download | linux-0f831ec85eda1ae27490baba106aba632c1d8e94.tar.xz | |
ovl: simplify ovl_same_sb() helper
No code uses the sb returned from this helper, so make it retrun a boolean
and rename it to ovl_same_fs().
The xino mode is irrelevant when all layers are on same fs, so instead of
describing samefs with mode OVL_XINO_OFF, use a new xino_mode state, which
is 0 in the case of samefs, -1 in the case of xino=off and > 0 with xino
enabled.
Create a new helper ovl_same_dev(), to use instead of the common check for
(ovl_same_fs() || xinobits).
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/overlayfs/overlayfs.h')
| -rw-r--r-- | fs/overlayfs/overlayfs.h | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index fea79f7680c8..e4ae3a459145 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -224,7 +224,6 @@ int ovl_want_write(struct dentry *dentry); void ovl_drop_write(struct dentry *dentry); struct dentry *ovl_workdir(struct dentry *dentry); const struct cred *ovl_override_creds(struct super_block *sb); -struct super_block *ovl_same_sb(struct super_block *sb); int ovl_can_decode_fh(struct super_block *sb); struct dentry *ovl_indexdir(struct super_block *sb); bool ovl_index_all(struct super_block *sb); @@ -302,11 +301,21 @@ static inline bool ovl_is_impuredir(struct dentry *dentry) return ovl_check_dir_xattr(dentry, OVL_XATTR_IMPURE); } -static inline unsigned int ovl_xino_bits(struct super_block *sb) +/* All layers on same fs? */ +static inline bool ovl_same_fs(struct super_block *sb) { - struct ovl_fs *ofs = sb->s_fs_info; + return OVL_FS(sb)->xino_mode == 0; +} - return ofs->xino_bits; +/* All overlay inodes have same st_dev? */ +static inline bool ovl_same_dev(struct super_block *sb) +{ + return OVL_FS(sb)->xino_mode >= 0; +} + +static inline unsigned int ovl_xino_bits(struct super_block *sb) +{ + return ovl_same_dev(sb) ? OVL_FS(sb)->xino_mode : 0; } static inline int ovl_inode_lock(struct inode *inode) |