[RFC PATCH 2/4] pass open file to ->getattr()

From: miklos
Date: Thu Aug 09 2007 - 11:31:57 EST

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From: Miklos Szeredi <mszeredi@xxxxxxx>

Pass the open file into the filesystem's ->getattr() method for
fstat().

This is needed to be able to correctly implement open-unlink-fstat
semantics in some filesystem such as sshfs, without having to resort
to "silly-renaming".

Do this by adding a 'struct file *' parameter to i_op->getattr(). For
fstat() pass the open file pointer, in other cases pass NULL.

This is safe from a compatibility standpoint, out-of-tree old stuff
will continue to work, but will get a warning at compile time.

Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxx>
---

Index: linux/fs/9p/vfs_inode.c
===================================================================
--- linux.orig/fs/9p/vfs_inode.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/9p/vfs_inode.c 2007-08-09 16:48:45.000000000 +0200
@@ -706,7 +706,7 @@ done:

static int
v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
- struct kstat *stat)
+ struct kstat *stat, struct file *file)
{
int err;
struct v9fs_session_info *v9ses;
Index: linux/fs/afs/inode.c
===================================================================
--- linux.orig/fs/afs/inode.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/afs/inode.c 2007-08-09 16:48:45.000000000 +0200
@@ -295,7 +295,7 @@ error_unlock:
* read the attributes of an inode
*/
int afs_getattr(struct vfsmount *mnt, struct dentry *dentry,
- struct kstat *stat)
+ struct kstat *stat, struct file *file)
{
struct inode *inode;

Index: linux/fs/afs/internal.h
===================================================================
--- linux.orig/fs/afs/internal.h 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/afs/internal.h 2007-08-09 16:48:45.000000000 +0200
@@ -548,7 +548,8 @@ extern struct inode *afs_iget(struct sup
struct afs_callback *);
extern void afs_zap_data(struct afs_vnode *);
extern int afs_validate(struct afs_vnode *, struct key *);
-extern int afs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
+extern int afs_getattr(struct vfsmount *, struct dentry *, struct kstat *,
+ struct file *);
extern int afs_setattr(struct dentry *, struct iattr *);
extern void afs_clear_inode(struct inode *);

Index: linux/fs/bad_inode.c
===================================================================
--- linux.orig/fs/bad_inode.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/bad_inode.c 2007-08-09 16:48:45.000000000 +0200
@@ -250,7 +250,7 @@ static int bad_inode_permission(struct i
}

static int bad_inode_getattr(struct vfsmount *mnt, struct dentry *dentry,
- struct kstat *stat)
+ struct kstat *stat, struct file *file)
{
return -EIO;
}
Index: linux/fs/cifs/cifsfs.h
===================================================================
--- linux.orig/fs/cifs/cifsfs.h 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/cifs/cifsfs.h 2007-08-09 16:48:45.000000000 +0200
@@ -55,7 +55,8 @@ extern int cifs_rmdir(struct inode *, st
extern int cifs_rename(struct inode *, struct dentry *, struct inode *,
struct dentry *);
extern int cifs_revalidate(struct dentry *);
-extern int cifs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
+extern int cifs_getattr(struct vfsmount *, struct dentry *, struct kstat *,
+ struct file *);
extern int cifs_setattr(struct dentry *, struct iattr *);

extern const struct inode_operations cifs_file_inode_ops;
Index: linux/fs/cifs/inode.c
===================================================================
--- linux.orig/fs/cifs/inode.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/cifs/inode.c 2007-08-09 16:48:45.000000000 +0200
@@ -1332,7 +1332,7 @@ int cifs_revalidate(struct dentry *diren
}

int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
- struct kstat *stat)
+ struct kstat *stat, struct file *file)
{
int err = cifs_revalidate(dentry);
if (!err) {
Index: linux/fs/coda/inode.c
===================================================================
--- linux.orig/fs/coda/inode.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/coda/inode.c 2007-08-09 16:48:45.000000000 +0200
@@ -220,7 +220,8 @@ static void coda_clear_inode(struct inod
coda_cache_clear_inode(inode);
}

-int coda_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
+int coda_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat, struct file *file)
{
int err = coda_revalidate_inode(dentry);
if (!err)
Index: linux/fs/fat/file.c
===================================================================
--- linux.orig/fs/fat/file.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/fat/file.c 2007-08-09 16:48:45.000000000 +0200
@@ -303,7 +303,8 @@ void fat_truncate(struct inode *inode)
fat_flush_inodes(inode->i_sb, inode, NULL);
}

-int fat_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
+int fat_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat, struct file *file)
{
struct inode *inode = dentry->d_inode;
generic_fillattr(inode, stat);
Index: linux/fs/fuse/dir.c
===================================================================
--- linux.orig/fs/fuse/dir.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/fuse/dir.c 2007-08-09 16:48:45.000000000 +0200
@@ -1056,7 +1056,7 @@ static int fuse_setattr(struct dentry *e
}

static int fuse_getattr(struct vfsmount *mnt, struct dentry *entry,
- struct kstat *stat)
+ struct kstat *stat, struct file *file)
{
struct inode *inode = entry->d_inode;
struct fuse_inode *fi = get_fuse_inode(inode);
Index: linux/fs/gfs2/ops_inode.c
===================================================================
--- linux.orig/fs/gfs2/ops_inode.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/gfs2/ops_inode.c 2007-08-09 16:48:45.000000000 +0200
@@ -1030,7 +1030,7 @@ out:
*/

static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
- struct kstat *stat)
+ struct kstat *stat, struct file *file)
{
struct inode *inode = dentry->d_inode;
struct gfs2_inode *ip = GFS2_I(inode);
Index: linux/fs/libfs.c
===================================================================
--- linux.orig/fs/libfs.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/libfs.c 2007-08-09 16:48:45.000000000 +0200
@@ -12,7 +12,7 @@
#include <asm/uaccess.h>

int simple_getattr(struct vfsmount *mnt, struct dentry *dentry,
- struct kstat *stat)
+ struct kstat *stat, struct file *file)
{
struct inode *inode = dentry->d_inode;
generic_fillattr(inode, stat);
Index: linux/fs/nfs/inode.c
===================================================================
--- linux.orig/fs/nfs/inode.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/nfs/inode.c 2007-08-09 16:48:45.000000000 +0200
@@ -423,7 +423,8 @@ static void nfs_wake_up_inode(struct ino
wake_up_bit(&nfsi->flags, NFS_INO_REVALIDATING);
}

-int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
+int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat, struct file *file)
{
struct inode *inode = dentry->d_inode;
int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
Index: linux/fs/ocfs2/file.c
===================================================================
--- linux.orig/fs/ocfs2/file.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/ocfs2/file.c 2007-08-09 16:48:45.000000000 +0200
@@ -1086,7 +1086,8 @@ bail:

int ocfs2_getattr(struct vfsmount *mnt,
struct dentry *dentry,
- struct kstat *stat)
+ struct kstat *stat,
+ struct file *file)
{
struct inode *inode = dentry->d_inode;
struct super_block *sb = dentry->d_inode->i_sb;
Index: linux/fs/ocfs2/file.h
===================================================================
--- linux.orig/fs/ocfs2/file.h 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/ocfs2/file.h 2007-08-09 16:48:45.000000000 +0200
@@ -53,7 +53,7 @@ int ocfs2_lock_allocators(struct inode *
struct ocfs2_alloc_context **meta_ac);
int ocfs2_setattr(struct dentry *dentry, struct iattr *attr);
int ocfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
- struct kstat *stat);
+ struct kstat *stat, struct file *file);
int ocfs2_permission(struct inode *inode, int mask,
struct nameidata *nd);

Index: linux/fs/proc/base.c
===================================================================
--- linux.orig/fs/proc/base.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/proc/base.c 2007-08-09 16:48:45.000000000 +0200
@@ -1028,7 +1028,8 @@ out_unlock:
return NULL;
}

-static int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
+static int pid_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat, struct file *file)
{
struct inode *inode = dentry->d_inode;
struct task_struct *task;
@@ -2584,7 +2585,8 @@ out_no_task:
return retval;
}

-static int proc_task_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
+static int proc_task_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat, struct file *file)
{
struct inode *inode = dentry->d_inode;
struct task_struct *p = get_proc_task(inode);
Index: linux/fs/proc/generic.c
===================================================================
--- linux.orig/fs/proc/generic.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/proc/generic.c 2007-08-09 16:48:45.000000000 +0200
@@ -255,7 +255,7 @@ out:
}

static int proc_getattr(struct vfsmount *mnt, struct dentry *dentry,
- struct kstat *stat)
+ struct kstat *stat, struct file *file)
{
struct inode *inode = dentry->d_inode;
struct proc_dir_entry *de = PROC_I(inode)->pde;
Index: linux/fs/proc/root.c
===================================================================
--- linux.orig/fs/proc/root.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/proc/root.c 2007-08-09 16:48:45.000000000 +0200
@@ -82,8 +82,8 @@ void __init proc_root_init(void)
proc_sys_init();
}

-static int proc_root_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat
-)
+static int proc_root_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat, struct file *file)
{
generic_fillattr(dentry->d_inode, stat);
stat->nlink = proc_root.nlink + nr_processes();
Index: linux/fs/smbfs/inode.c
===================================================================
--- linux.orig/fs/smbfs/inode.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/smbfs/inode.c 2007-08-09 16:48:45.000000000 +0200
@@ -659,7 +659,8 @@ smb_statfs(struct dentry *dentry, struct
return result;
}

-int smb_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
+int smb_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat, struct file *file)
{
int err = smb_revalidate_inode(dentry);
if (!err)
Index: linux/fs/smbfs/proto.h
===================================================================
--- linux.orig/fs/smbfs/proto.h 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/smbfs/proto.h 2007-08-09 16:48:45.000000000 +0200
@@ -60,7 +60,8 @@ extern void smb_get_inode_attr(struct in
extern void smb_set_inode_attr(struct inode *inode, struct smb_fattr *fattr);
extern void smb_invalidate_inodes(struct smb_sb_info *server);
extern int smb_revalidate_inode(struct dentry *dentry);
-extern int smb_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat);
+extern int smb_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat, struct file *file);
extern int smb_notify_change(struct dentry *dentry, struct iattr *attr);
/* file.c */
extern const struct address_space_operations smb_file_aops;
Index: linux/fs/stat.c
===================================================================
--- linux.orig/fs/stat.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/stat.c 2007-08-09 16:48:45.000000000 +0200
@@ -37,7 +37,8 @@ void generic_fillattr(struct inode *inod

EXPORT_SYMBOL(generic_fillattr);

-int vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
+static int vfs_fgetattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat, struct file *file)
{
struct inode *inode = dentry->d_inode;
int retval;
@@ -47,12 +48,17 @@ int vfs_getattr(struct vfsmount *mnt, st
return retval;

if (inode->i_op->getattr)
- return inode->i_op->getattr(mnt, dentry, stat);
+ return inode->i_op->getattr(mnt, dentry, stat, file);

generic_fillattr(inode, stat);
return 0;
}

+int vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
+{
+ return vfs_fgetattr(mnt, dentry, stat, NULL);
+}
+
EXPORT_SYMBOL(vfs_getattr);

int vfs_stat_fd(int dfd, char __user *name, struct kstat *stat)
@@ -62,7 +68,7 @@ int vfs_stat_fd(int dfd, char __user *na

error = __user_walk_fd(dfd, name, LOOKUP_FOLLOW, &nd);
if (!error) {
- error = vfs_getattr(nd.mnt, nd.dentry, stat);
+ error = vfs_fgetattr(nd.mnt, nd.dentry, stat, NULL);
path_release(&nd);
}
return error;
@@ -82,7 +88,7 @@ int vfs_lstat_fd(int dfd, char __user *n

error = __user_walk_fd(dfd, name, 0, &nd);
if (!error) {
- error = vfs_getattr(nd.mnt, nd.dentry, stat);
+ error = vfs_fgetattr(nd.mnt, nd.dentry, stat, NULL);
path_release(&nd);
}
return error;
@@ -101,7 +107,7 @@ int vfs_fstat(unsigned int fd, struct ks
int error = -EBADF;

if (f) {
- error = vfs_getattr(f->f_path.mnt, f->f_path.dentry, stat);
+ error = vfs_fgetattr(f->f_path.mnt, f->f_path.dentry, stat, f);
fput(f);
}
return error;
Index: linux/fs/sysv/itree.c
===================================================================
--- linux.orig/fs/sysv/itree.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/sysv/itree.c 2007-08-09 16:48:45.000000000 +0200
@@ -440,7 +440,8 @@ static unsigned sysv_nblocks(struct supe
return blocks;
}

-int sysv_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
+int sysv_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat, struct file *file)
{
struct super_block *s = mnt->mnt_sb;
generic_fillattr(dentry->d_inode, stat);
Index: linux/fs/sysv/sysv.h
===================================================================
--- linux.orig/fs/sysv/sysv.h 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/sysv/sysv.h 2007-08-09 16:48:45.000000000 +0200
@@ -145,7 +145,8 @@ extern int sysv_write_inode(struct inode
extern int sysv_sync_inode(struct inode *);
extern int sysv_sync_file(struct file *, struct dentry *, int);
extern void sysv_set_inode(struct inode *, dev_t);
-extern int sysv_getattr(struct vfsmount *, struct dentry *, struct kstat *);
+extern int sysv_getattr(struct vfsmount *, struct dentry *, struct kstat *,
+ struct file *);
extern int sysv_init_icache(void);
extern void sysv_destroy_icache(void);

Index: linux/fs/xfs/linux-2.6/xfs_iops.c
===================================================================
--- linux.orig/fs/xfs/linux-2.6/xfs_iops.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/xfs/linux-2.6/xfs_iops.c 2007-08-09 16:48:45.000000000 +0200
@@ -617,7 +617,8 @@ STATIC int
xfs_vn_getattr(
struct vfsmount *mnt,
struct dentry *dentry,
- struct kstat *stat)
+ struct kstat *stat,
+ struct file *file)
{
struct inode *inode = dentry->d_inode;
bhv_vnode_t *vp = vn_from_inode(inode);
Index: linux/include/linux/coda_linux.h
===================================================================
--- linux.orig/include/linux/coda_linux.h 2007-08-09 16:47:30.000000000 +0200
+++ linux/include/linux/coda_linux.h 2007-08-09 16:48:45.000000000 +0200
@@ -39,7 +39,8 @@ int coda_open(struct inode *i, struct fi
int coda_release(struct inode *i, struct file *f);
int coda_permission(struct inode *inode, int mask, struct nameidata *nd);
int coda_revalidate_inode(struct dentry *);
-int coda_getattr(struct vfsmount *, struct dentry *, struct kstat *);
+int coda_getattr(struct vfsmount *, struct dentry *, struct kstat *,
+ struct file *);
int coda_setattr(struct dentry *, struct iattr *);

/* this file: heloers */
Index: linux/include/linux/fs.h
===================================================================
--- linux.orig/include/linux/fs.h 2007-08-09 16:47:30.000000000 +0200
+++ linux/include/linux/fs.h 2007-08-09 16:48:45.000000000 +0200
@@ -1210,7 +1210,8 @@ struct inode_operations {
void (*truncate) (struct inode *);
int (*permission) (struct inode *, int, struct nameidata *);
int (*setattr) (struct dentry *, struct iattr *);
- int (*getattr) (struct vfsmount *mnt, struct dentry *, struct kstat *);
+ int (*getattr) (struct vfsmount *mnt, struct dentry *, struct kstat *,
+ struct file *file);
int (*setxattr) (struct dentry *, const char *,const void *,size_t,int);
ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t);
ssize_t (*listxattr) (struct dentry *, char *, size_t);
@@ -1929,7 +1930,8 @@ extern int dcache_dir_open(struct inode
extern int dcache_dir_close(struct inode *, struct file *);
extern loff_t dcache_dir_lseek(struct file *, loff_t, int);
extern int dcache_readdir(struct file *, void *, filldir_t);
-extern int simple_getattr(struct vfsmount *, struct dentry *, struct kstat *);
+extern int simple_getattr(struct vfsmount *, struct dentry *, struct kstat *,
+ struct file *);
extern int simple_statfs(struct dentry *, struct kstatfs *);
extern int simple_link(struct dentry *, struct inode *, struct dentry *);
extern int simple_unlink(struct inode *, struct dentry *);
Index: linux/include/linux/msdos_fs.h
===================================================================
--- linux.orig/include/linux/msdos_fs.h 2007-08-09 16:47:30.000000000 +0200
+++ linux/include/linux/msdos_fs.h 2007-08-09 16:48:45.000000000 +0200
@@ -404,7 +404,7 @@ extern const struct inode_operations fat
extern int fat_notify_change(struct dentry * dentry, struct iattr * attr);
extern void fat_truncate(struct inode *inode);
extern int fat_getattr(struct vfsmount *mnt, struct dentry *dentry,
- struct kstat *stat);
+ struct kstat *stat, struct file *file);

/* fat/inode.c */
extern void fat_attach(struct inode *inode, loff_t i_pos);
Index: linux/include/linux/nfs_fs.h
===================================================================
--- linux.orig/include/linux/nfs_fs.h 2007-08-09 16:47:30.000000000 +0200
+++ linux/include/linux/nfs_fs.h 2007-08-09 16:48:45.000000000 +0200
@@ -285,7 +285,8 @@ extern struct inode *nfs_fhget(struct su
struct nfs_fattr *);
extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr);
-extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
+extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *,
+ struct file *);
extern int nfs_permission(struct inode *, int, struct nameidata *);
extern int nfs_access_get_cached(struct inode *, struct rpc_cred *, struct nfs_access_entry *);
extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *);
Index: linux/fs/reiser4/plugin/inode_ops.c
===================================================================
--- linux.orig/fs/reiser4/plugin/inode_ops.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/reiser4/plugin/inode_ops.c 2007-08-09 16:48:53.000000000 +0200
@@ -475,7 +475,8 @@ int reiser4_setattr_common(struct dentry
inode_operations
*/
int reiser4_getattr_common(struct vfsmount *mnt UNUSED_ARG,
- struct dentry *dentry, struct kstat *stat)
+ struct dentry *dentry, struct kstat *stat,
+ struct file *file UNUSED_ARG)
{
struct inode *obj;

Index: linux/fs/reiser4/plugin/object.h
===================================================================
--- linux.orig/fs/reiser4/plugin/object.h 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/reiser4/plugin/object.h 2007-08-09 16:48:53.000000000 +0200
@@ -29,7 +29,7 @@ int reiser4_permission_common(struct ino
struct nameidata *nameidata);
int reiser4_setattr_common(struct dentry *, struct iattr *);
int reiser4_getattr_common(struct vfsmount *mnt, struct dentry *,
- struct kstat *);
+ struct kstat *, struct file *);

/* common implementations of file operations */
loff_t reiser4_llseek_dir_common(struct file *, loff_t off, int origin);
Index: linux/fs/revoked_inode.c
===================================================================
--- linux.orig/fs/revoked_inode.c 2007-08-09 16:47:30.000000000 +0200
+++ linux/fs/revoked_inode.c 2007-08-09 16:48:53.000000000 +0200
@@ -295,7 +295,7 @@ static int revoked_inode_permission(stru
}

static int revoked_inode_getattr(struct vfsmount *mnt, struct dentry *dentry,
- struct kstat *stat)
+ struct kstat *stat, struct file *file)
{
return -EBADF;
}

--
-
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Next message: Peter Zijlstra: "Re: 2.6.23-rc2-mm1: hang, prop_norm_single involved"
Previous message: miklos: "[RFC PATCH 4/4] VFS: allow filesystem to override mknod capability checks"
In reply to: Serge E. Hallyn: "Re: [RFC PATCH 4/4] VFS: allow filesystem to override mknod capability checks"
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