From 6ef4e9cbe15df691323af007831dab4e70faa1cf Mon Sep 17 00:00:00 2001 From: Ronnie Sahlberg Date: Tue, 9 Mar 2021 09:07:32 +1000 Subject: cifs: add a function to get a cached dir based on its dentry Needed for subsequent patches in the directory caching series. Signed-off-by: Ronnie Sahlberg Signed-off-by: Steve French --- fs/cifs/smb2ops.c | 16 ++++++++++++++++ fs/cifs/smb2proto.h | 3 +++ 2 files changed, 19 insertions(+) diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index 5864ef600ee9..65d303466581 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -925,6 +925,22 @@ oshr_free: return rc; } +int open_cached_dir_by_dentry(struct cifs_tcon *tcon, + struct dentry *dentry, + struct cached_fid **cfid) +{ + mutex_lock(&tcon->crfid.fid_mutex); + if (tcon->crfid.dentry == dentry) { + cifs_dbg(FYI, "found a cached root file handle by dentry\n"); + *cfid = &tcon->crfid; + kref_get(&tcon->crfid.refcount); + mutex_unlock(&tcon->crfid.fid_mutex); + return 0; + } + mutex_unlock(&tcon->crfid.fid_mutex); + return -ENOENT; +} + static void smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb) diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h index 28e8d821103c..a5f87b02cfaf 100644 --- a/fs/cifs/smb2proto.h +++ b/fs/cifs/smb2proto.h @@ -73,6 +73,9 @@ extern int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon, const char *path, struct cifs_sb_info *cifs_sb, struct cached_fid **cfid); +extern int open_cached_dir_by_dentry(struct cifs_tcon *tcon, + struct dentry *dentry, + struct cached_fid **cfid); extern void close_cached_dir(struct cached_fid *cfid); extern void close_cached_dir_lease(struct cached_fid *cfid); extern void close_cached_dir_lease_locked(struct cached_fid *cfid); -- cgit v1.2.3-58-ga151