Commit ce634ab2 authored by David Howells's avatar David Howells Committed by Linus Torvalds
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iget: stop CIFS from using iget() and read_inode() 



Stop the CIFS filesystem from using iget() and read_inode().  Replace
cifs_read_inode() with cifs_iget(), and call that instead of iget().
cifs_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.

cifs_read_super() now returns any error incurred when getting the root inode
instead of ENOMEM.

cifs_iget() needs examining.  The comment "can not call macro FreeXid here
since in a void func" is no longer true.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Cc: Steven French <sfrench@us.ibm.com>
Acked-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e33ab086

fs/cifs/cifsfs.c

+4 −4
Original line number Diff line number Diff line
@@ -147,10 +147,11 @@ cifs_read_super(struct super_block *sb, void *data, 
#endif

	sb->s_blocksize = CIFS_MAX_MSGSIZE;

	sb->s_blocksize_bits = 14;	/* default 2**14 = CIFS_MAX_MSGSIZE */

	inode = iget(sb, ROOT_I);

	inode = cifs_iget(sb, ROOT_I);



	if (!inode) {

		rc = -ENOMEM;

	if (IS_ERR(inode)) {

		rc = PTR_ERR(inode);

		inode = NULL;

		goto out_no_root;

	}
@@ -520,7 +521,6 @@ static int cifs_remount(struct super_block *sb, int *flags, char *data) 
}



static const struct super_operations cifs_super_ops = {

	.read_inode = cifs_read_inode,

	.put_super = cifs_put_super,

	.statfs = cifs_statfs,

	.alloc_inode = cifs_alloc_inode,

fs/cifs/cifsfs.h

+1 −0
Original line number Diff line number Diff line
@@ -44,6 +44,7 @@ extern void cifs_read_inode(struct inode *); 


/* Functions related to inodes */

extern const struct inode_operations cifs_dir_inode_ops;

extern struct inode *cifs_iget(struct super_block *, unsigned long);

extern int cifs_create(struct inode *, struct dentry *, int,

		       struct nameidata *);

extern struct dentry *cifs_lookup(struct inode *, struct dentry *,

fs/cifs/inode.c

+19 −3
Original line number Diff line number Diff line
@@ -586,10 +586,18 @@ static const struct inode_operations cifs_ipc_inode_ops = { 
};



/* gets root inode */

void cifs_read_inode(struct inode *inode)

struct inode *cifs_iget(struct super_block *sb, unsigned long ino)

{

	int xid, rc;

	int xid;

	struct cifs_sb_info *cifs_sb;

	struct inode *inode;

	long rc;



	inode = iget_locked(sb, ino);

	if (!inode)

		return ERR_PTR(-ENOMEM);

	if (!(inode->i_state & I_NEW))

		return inode;



	cifs_sb = CIFS_SB(inode->i_sb);

	xid = GetXid();
@@ -606,10 +614,18 @@ void cifs_read_inode(struct inode *inode) 
		inode->i_fop = &simple_dir_operations;

		inode->i_uid = cifs_sb->mnt_uid;

		inode->i_gid = cifs_sb->mnt_gid;

		_FreeXid(xid);

		iget_failed(inode);

		return ERR_PTR(rc);

	}



	/* can not call macro FreeXid here since in a void func */

	unlock_new_inode(inode);



	/* can not call macro FreeXid here since in a void func

	 * TODO: This is no longer true

	 */

	_FreeXid(xid);

	return inode;

}



int cifs_unlink(struct inode *inode, struct dentry *direntry)

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