From: Vivek Goyal <[email protected]> Right now two copy up helpers are in inode.c. Amir suggested it might be better to move these to copy_up.c.
There will one more related function which will come in later patch. Signed-off-by: Vivek Goyal <[email protected]> Reviewed-by: Amir Goldstein <[email protected]> Signed-off-by: Miklos Szeredi <[email protected]> --- fs/overlayfs/copy_up.c | 32 ++++++++++++++++++++++++++++++++ fs/overlayfs/inode.c | 32 -------------------------------- fs/overlayfs/overlayfs.h | 2 +- 3 files changed, 33 insertions(+), 33 deletions(-) diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c index e675e8349e71..91b3b668482b 100644 --- a/fs/overlayfs/copy_up.c +++ b/fs/overlayfs/copy_up.c @@ -779,6 +779,38 @@ int ovl_copy_up_flags(struct dentry *dentry, int flags) return err; } +static bool ovl_open_need_copy_up(struct dentry *dentry, int flags) +{ + /* Copy up of disconnected dentry does not set upper alias */ + if (ovl_dentry_upper(dentry) && + (ovl_dentry_has_upper_alias(dentry) || + (dentry->d_flags & DCACHE_DISCONNECTED))) + return false; + + if (special_file(d_inode(dentry)->i_mode)) + return false; + + if (!(OPEN_FMODE(flags) & FMODE_WRITE) && !(flags & O_TRUNC)) + return false; + + return true; +} + +int ovl_open_maybe_copy_up(struct dentry *dentry, unsigned int file_flags) +{ + int err = 0; + + if (ovl_open_need_copy_up(dentry, file_flags)) { + err = ovl_want_write(dentry); + if (!err) { + err = ovl_copy_up_flags(dentry, file_flags); + ovl_drop_write(dentry); + } + } + + return err; +} + int ovl_copy_up(struct dentry *dentry) { return ovl_copy_up_flags(dentry, 0); diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c index c365b94fa158..60c88a09a3f3 100644 --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -399,38 +399,6 @@ struct posix_acl *ovl_get_acl(struct inode *inode, int type) return acl; } -static bool ovl_open_need_copy_up(struct dentry *dentry, int flags) -{ - /* Copy up of disconnected dentry does not set upper alias */ - if (ovl_dentry_upper(dentry) && - (ovl_dentry_has_upper_alias(dentry) || - (dentry->d_flags & DCACHE_DISCONNECTED))) - return false; - - if (special_file(d_inode(dentry)->i_mode)) - return false; - - if (!(OPEN_FMODE(flags) & FMODE_WRITE) && !(flags & O_TRUNC)) - return false; - - return true; -} - -int ovl_open_maybe_copy_up(struct dentry *dentry, unsigned int file_flags) -{ - int err = 0; - - if (ovl_open_need_copy_up(dentry, file_flags)) { - err = ovl_want_write(dentry); - if (!err) { - err = ovl_copy_up_flags(dentry, file_flags); - ovl_drop_write(dentry); - } - } - - return err; -} - int ovl_update_time(struct inode *inode, struct timespec *ts, int flags) { if (flags & S_ATIME) { diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index 1948e38c3c95..9172d3d5d870 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -332,7 +332,6 @@ int ovl_xattr_get(struct dentry *dentry, struct inode *inode, const char *name, void *value, size_t size); ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size); struct posix_acl *ovl_get_acl(struct inode *inode, int type); -int ovl_open_maybe_copy_up(struct dentry *dentry, unsigned int file_flags); int ovl_update_time(struct inode *inode, struct timespec *ts, int flags); bool ovl_is_private_xattr(const char *name); @@ -391,6 +390,7 @@ extern const struct file_operations ovl_file_operations; /* copy_up.c */ int ovl_copy_up(struct dentry *dentry); int ovl_copy_up_flags(struct dentry *dentry, int flags); +int ovl_open_maybe_copy_up(struct dentry *dentry, unsigned int file_flags); int ovl_copy_xattr(struct dentry *old, struct dentry *new); int ovl_set_attr(struct dentry *upper, struct kstat *stat); struct ovl_fh *ovl_encode_real_fh(struct dentry *real, bool is_upper); -- 2.14.3
