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cifs: have cifsFileInfo hold a reference to a tlink rather than tcon pointer

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cifsFileInfo needs a pointer to a tcon, but it doesn't currently hold a
reference to it. Change it to keep a pointer to a tcon_link instead and
hold a reference to it.

That will keep the tcon from being freed until the file is closed.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Jeff Layton
2010-09-29 19:51:11 -04:00
committed by Steve French
parent 7ffec37245
commit 13cfb7334e
9 changed files with 41 additions and 33 deletions
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10
fs/cifs/dir.c
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@@ -132,7 +132,7 @@ cifs_bp_rename_retry:
struct cifsFileInfo *
cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle, struct file *file,
struct vfsmount *mnt, struct cifsTconInfo *tcon,
struct vfsmount *mnt, struct tcon_link *tlink,
unsigned int oflags, __u32 oplock)
{
struct cifsFileInfo *pCifsFile;
@@ -149,7 +149,7 @@ cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle, struct file *file,
pCifsFile->pfile = file;
pCifsFile->invalidHandle = false;
pCifsFile->closePend = false;
pCifsFile->tcon = tcon;
pCifsFile->tlink = cifs_get_tlink(tlink);
mutex_init(&pCifsFile->fh_mutex);
mutex_init(&pCifsFile->lock_mutex);
INIT_LIST_HEAD(&pCifsFile->llist);
@@ -157,7 +157,7 @@ cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle, struct file *file,
INIT_WORK(&pCifsFile->oplock_break, cifs_oplock_break);
write_lock(&GlobalSMBSeslock);
list_add(&pCifsFile->tlist, &tcon->openFileList);
list_add(&pCifsFile->tlist, &(tlink_tcon(tlink)->openFileList));
pCifsInode = CIFS_I(newinode);
if (pCifsInode) {
/* if readable file instance put first in list*/
@@ -483,7 +483,7 @@ cifs_create_set_dentry:
}
pfile_info = cifs_new_fileinfo(newinode, fileHandle, filp,
nd->path.mnt, tcon, oflags,
nd->path.mnt, tlink, oflags,
oplock);
if (pfile_info == NULL) {
fput(filp);
@@ -758,7 +758,7 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
}
cfile = cifs_new_fileinfo(newInode, fileHandle, filp,
nd->path.mnt, pTcon,
nd->path.mnt, tlink,
nd->intent.open.flags,
oplock);
if (cfile == NULL) {