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authorJeff Layton <jlayton@redhat.com>2010-10-11 15:07:18 -0400
committerSteve French <sfrench@us.ibm.com>2010-10-12 18:06:42 +0000
commita5e18bc36e9e05ce0338d370a2ce4290910e43ea (patch)
tree9d8b37c1dd20267c372ff8c98850eeb2f204449b
parent1c456013e96f10915578dc61095d19b4906f64ac (diff)
cifs: keep dentry reference in cifsFileInfo instead of inode reference
cifsFileInfo is a bit problematic. It contains a reference back to the struct file itself. This makes it difficult for a cifsFileInfo to exist without a corresponding struct file. It would be better instead of the cifsFileInfo just held info pertaining to the open file on the server instead without any back refrences to the struct file. This would allow it to exist after the filp to which it was originally attached was closed. Much of the use of the file pointer in this struct is to get at the dentry. Begin divorcing the cifsFileInfo from the struct file by keeping a reference to the dentry. Since the dentry will have a reference to the inode, we can eliminate the "pInode" field too and convert the igrab/iput to dget/dput. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Suresh Jayaraman <sjayaraman@suse.de> Acked-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
-rw-r--r--fs/cifs/cifsglob.h4
-rw-r--r--fs/cifs/dir.c3
-rw-r--r--fs/cifs/file.c2
-rw-r--r--fs/cifs/misc.c2
4 files changed, 6 insertions, 5 deletions
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 4f85dfdf197d..8289e61937a2 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -387,7 +387,7 @@ struct cifsFileInfo {
/* BB add lock scope info here if needed */ ;
/* lock scope id (0 if none) */
struct file *pfile; /* needed for writepage */
- struct inode *pInode; /* needed for oplock break */
+ struct dentry *dentry;
struct vfsmount *mnt;
struct tcon_link *tlink;
struct mutex lock_mutex;
@@ -412,7 +412,7 @@ static inline void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
{
if (atomic_dec_and_test(&cifs_file->count)) {
cifs_put_tlink(cifs_file->tlink);
- iput(cifs_file->pInode);
+ dput(cifs_file->dentry);
kfree(cifs_file);
}
}
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index e249b561ce8f..6887c412c61a 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -135,6 +135,7 @@ cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle, struct file *file,
struct vfsmount *mnt, struct tcon_link *tlink,
unsigned int oflags, __u32 oplock)
{
+ struct dentry *dentry = file->f_path.dentry;
struct cifsFileInfo *pCifsFile;
struct cifsInodeInfo *pCifsInode;
@@ -145,7 +146,7 @@ cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle, struct file *file,
pCifsFile->netfid = fileHandle;
pCifsFile->pid = current->tgid;
pCifsFile->uid = current_fsuid();
- pCifsFile->pInode = igrab(newinode);
+ pCifsFile->dentry = dget(dentry);
pCifsFile->mnt = mnt;
pCifsFile->pfile = file;
pCifsFile->invalidHandle = false;
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 80856f180711..c302b9c52644 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -2335,7 +2335,7 @@ void cifs_oplock_break(struct work_struct *work)
{
struct cifsFileInfo *cfile = container_of(work, struct cifsFileInfo,
oplock_break);
- struct inode *inode = cfile->pInode;
+ struct inode *inode = cfile->dentry->d_inode;
struct cifsInodeInfo *cinode = CIFS_I(inode);
int rc, waitrc = 0;
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index 252f2768db84..9bac3e74b314 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -578,7 +578,7 @@ is_valid_oplock_break(struct smb_hdr *buf, struct TCP_Server_Info *srv)
}
cFYI(1, "file id match, oplock break");
- pCifsInode = CIFS_I(netfile->pInode);
+ pCifsInode = CIFS_I(netfile->dentry->d_inode);
pCifsInode->clientCanCacheAll = false;
if (pSMB->OplockLevel == 0)
pCifsInode->clientCanCacheRead = false;