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cifs: add a function to get a cached dir based on its dentry

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Needed for subsequent patches in the directory caching
series.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Ronnie Sahlberg 2021-03-09 09:07:32 +10:00 committed by Steve French
parent 5e9c89d43f
commit 6ef4e9cbe1
2 changed files with 19 additions and 0 deletions
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16
fs/cifs/smb2ops.c
View File

@ -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)

3
fs/cifs/smb2proto.h
View File

@ -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);