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cifs: add lease tracking to the cached root fid

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Use a read lease for the cached root fid so that we can detect
when the content of the directory changes (via a break) at which time
we close the handle. On next access to the root the handle will be reopened
and cached again.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Ronnie Sahlberg
2018-06-14 06:48:35 +10:00
committed by Steve French
parent 2fbb56446f
commit a93864d939
6 changed files with 58 additions and 20 deletions
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7
fs/cifs/misc.c
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@@ -117,8 +117,9 @@ tconInfoAlloc(void)
INIT_LIST_HEAD(&ret_buf->openFileList);
INIT_LIST_HEAD(&ret_buf->tcon_list);
spin_lock_init(&ret_buf->open_file_lock);
mutex_init(&ret_buf->prfid_mutex);
ret_buf->prfid = kzalloc(sizeof(struct cifs_fid), GFP_KERNEL);
mutex_init(&ret_buf->crfid.fid_mutex);
ret_buf->crfid.fid = kzalloc(sizeof(struct cifs_fid),
GFP_KERNEL);
#ifdef CONFIG_CIFS_STATS
spin_lock_init(&ret_buf->stat_lock);
#endif
@@ -136,7 +137,7 @@ tconInfoFree(struct cifs_tcon *buf_to_free)
atomic_dec(&tconInfoAllocCount);
kfree(buf_to_free->nativeFileSystem);
kzfree(buf_to_free->password);
kfree(buf_to_free->prfid);
kfree(buf_to_free->crfid.fid);
kfree(buf_to_free);
}