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| author | Vivek Goyal <vgoyal@redhat.com> | 2018-05-11 11:49:30 -0400 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2018-07-20 09:56:10 +0200 |
| commit | 67d756c27ac4f4576dee313579724bd8711bc75e (patch) | |
| tree | 899a2a39cfd62193e07e0876790f54b7e327720f /fs/overlayfs/overlayfs.h | |
| parent | 647d253fcd53fae185408b33ec5587a57cb3cc88 (diff) | |
| download | linux-rpi-67d756c27ac4f4576dee313579724bd8711bc75e.tar.gz linux-rpi-67d756c27ac4f4576dee313579724bd8711bc75e.tar.bz2 linux-rpi-67d756c27ac4f4576dee313579724bd8711bc75e.zip | |
ovl: Fix ovl_getattr() to get number of blocks from lower
If an inode has been copied up metadata only, then we need to query the
number of blocks from lower and fill up the stat->st_blocks.
We need to be careful about races where we are doing stat on one cpu and
data copy up is taking place on other cpu. We want to return
stat->st_blocks either from lower or stable upper and not something in
between. Hence, ovl_has_upperdata() is called first to figure out whether
block reporting will take place from lower or upper.
We now support metacopy dentries in middle layer. That means number of
blocks reporting needs to come from lowest data dentry and this could be
different from lower dentry. Hence we end up making a separate
vfs_getxattr() call for metacopy dentries to get number of blocks.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Reviewed-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 | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index deda94381aac..de80250b379f 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -271,6 +271,7 @@ int ovl_nlink_start(struct dentry *dentry, bool *locked); void ovl_nlink_end(struct dentry *dentry, bool locked); int ovl_lock_rename_workdir(struct dentry *workdir, struct dentry *upperdir); int ovl_check_metacopy_xattr(struct dentry *dentry); +bool ovl_is_metacopy_dentry(struct dentry *dentry); static inline bool ovl_is_impuredir(struct dentry *dentry) { |