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cifs: Make tcon contain a wrapper structure cached_fids instead of cached_fid 

This wrapper structure will later be expanded to contain a list of
fids that are cached and not just the root fid.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Ronnie Sahlberg 2022-08-31 12:49:42 +10:00 committed by Steve French
parent 68e14569d7
commit aea6794e66
4 changed files with 37 additions and 29 deletions
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50
fs/cifs/cached_dir.c
View File

@ -52,7 +52,7 @@ int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
dentry = cifs_sb->root;
cfid = tcon->cfid;
cfid = &tcon->cfids->cfid;
mutex_lock(&cfid->fid_mutex);
if (cfid->is_valid) {
cifs_dbg(FYI, "found a cached root file handle\n");
@ -226,7 +226,7 @@ int open_cached_dir_by_dentry(struct cifs_tcon *tcon,
{
struct cached_fid *cfid;
cfid = tcon->cfid;
cfid = &tcon->cfids->cfid;
mutex_lock(&cfid->fid_mutex);
if (cfid->dentry == dentry) {
@ -320,7 +320,7 @@ void close_all_cached_dirs(struct cifs_sb_info *cifs_sb)
tcon = tlink_tcon(tlink);
if (IS_ERR(tcon))
continue;
cfid = tcon->cfid;
cfid = &tcon->cfids->cfid;
mutex_lock(&cfid->fid_mutex);
if (cfid->dentry) {
dput(cfid->dentry);
@ -336,12 +336,14 @@ void close_all_cached_dirs(struct cifs_sb_info *cifs_sb)
*/
void invalidate_all_cached_dirs(struct cifs_tcon *tcon)
{
mutex_lock(&tcon->cfid->fid_mutex);
tcon->cfid->is_valid = false;
struct cached_fid *cfid = &tcon->cfids->cfid;
mutex_lock(&cfid->fid_mutex);
cfid->is_valid = false;
/* cached handle is not valid, so SMB2_CLOSE won't be sent below */
close_cached_dir_lease_locked(tcon->cfid);
memset(&tcon->cfid->fid, 0, sizeof(struct cifs_fid));
mutex_unlock(&tcon->cfid->fid_mutex);
close_cached_dir_lease_locked(cfid);
memset(&cfid->fid, 0, sizeof(struct cifs_fid));
mutex_unlock(&cfid->fid_mutex);
}
static void
@ -355,34 +357,36 @@ smb2_cached_lease_break(struct work_struct *work)
int cached_dir_lease_break(struct cifs_tcon *tcon, __u8 lease_key[16])
{
if (tcon->cfid->is_valid &&
struct cached_fid *cfid = &tcon->cfids->cfid;
if (cfid->is_valid &&
!memcmp(lease_key,
tcon->cfid->fid.lease_key,
cfid->fid.lease_key,
SMB2_LEASE_KEY_SIZE)) {
tcon->cfid->time = 0;
INIT_WORK(&tcon->cfid->lease_break,
cfid->time = 0;
INIT_WORK(&cfid->lease_break,
smb2_cached_lease_break);
queue_work(cifsiod_wq,
&tcon->cfid->lease_break);
&cfid->lease_break);
return true;
}
return false;
}
struct cached_fid *init_cached_dir(void)
struct cached_fids *init_cached_dirs(void)
{
struct cached_fid *cfid;
struct cached_fids *cfids;
cfid = kzalloc(sizeof(*cfid), GFP_KERNEL);
if (!cfid)
cfids = kzalloc(sizeof(*cfids), GFP_KERNEL);
if (!cfids)
return NULL;
INIT_LIST_HEAD(&cfid->dirents.entries);
mutex_init(&cfid->dirents.de_mutex);
mutex_init(&cfid->fid_mutex);
return cfid;
INIT_LIST_HEAD(&cfids->cfid.dirents.entries);
mutex_init(&cfids->cfid.dirents.de_mutex);
mutex_init(&cfids->cfid.fid_mutex);
return cfids;
}
void free_cached_dir(struct cifs_tcon *tcon)
void free_cached_dirs(struct cached_fids *cfids)
{
kfree(tcon->cfid);
kfree(cfids);
}

8
fs/cifs/cached_dir.h
View File

@ -45,8 +45,12 @@ struct cached_fid {
struct cached_dirents dirents;
};
extern struct cached_fid *init_cached_dir(void);
extern void free_cached_dir(struct cifs_tcon *tcon);
struct cached_fids {
struct cached_fid cfid;
};
extern struct cached_fids *init_cached_dirs(void);
extern void free_cached_dirs(struct cached_fids *cfids);
extern int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
const char *path,
struct cifs_sb_info *cifs_sb,

2
fs/cifs/cifsglob.h
View File

@ -1228,7 +1228,7 @@ struct cifs_tcon {
struct fscache_volume *fscache; /* cookie for share */
#endif
struct list_head pending_opens; /* list of incomplete opens */
struct cached_fid *cfid; /* Cached root fid */
struct cached_fids *cfids;
/* BB add field for back pointer to sb struct(s)? */
#ifdef CONFIG_CIFS_DFS_UPCALL
struct list_head ulist; /* cache update list */

6
fs/cifs/misc.c
View File

@ -117,8 +117,8 @@ tconInfoAlloc(void)
ret_buf = kzalloc(sizeof(*ret_buf), GFP_KERNEL);
if (!ret_buf)
return NULL;
ret_buf->cfid = init_cached_dir();
if (!ret_buf->cfid) {
ret_buf->cfids = init_cached_dirs();
if (!ret_buf->cfids) {
kfree(ret_buf);
return NULL;
}
@ -144,7 +144,7 @@ tconInfoFree(struct cifs_tcon *tcon)
cifs_dbg(FYI, "Null buffer passed to tconInfoFree\n");
return;
}
free_cached_dir(tcon);
free_cached_dirs(tcon->cfids);
atomic_dec(&tconInfoAllocCount);
kfree(tcon->nativeFileSystem);
kfree_sensitive(tcon->password);