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authorAl Viro <viro@zeniv.linux.org.uk>2008-12-26 00:57:40 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2008-12-31 18:07:43 -0500
commit6badd79bd002788aaec27b50a74ab69ef65ab8ee (patch)
tree2a47bf53a7fe2316d98cca71f0b7d01d5024a5ea
parentb6b3fdead251d432f32f2cfce2a893ab8a658110 (diff)
kill ->dir_notify()
Remove the hopelessly misguided ->dir_notify(). The only instance (cifs) has been broken by design from the very beginning; the objects it creates are never destroyed, keep references to struct file they can outlive, nothing that could possibly evict them exists on close(2) path *and* no locking whatsoever is done to prevent races with close(), should the previous, er, deficiencies someday be dealt with. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--Documentation/filesystems/Locking2
-rw-r--r--Documentation/filesystems/vfs.txt3
-rw-r--r--fs/bad_inode.c6
-rw-r--r--fs/cifs/Makefile2
-rw-r--r--fs/cifs/cifsfs.c7
-rw-r--r--fs/cifs/cifsfs.h1
-rw-r--r--fs/cifs/fcntl.c118
-rw-r--r--fs/dnotify.c3
-rw-r--r--include/linux/fs.h1
9 files changed, 1 insertions, 142 deletions
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 23d2f4460de..ccec5539438 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -394,7 +394,6 @@ prototypes:
unsigned long (*get_unmapped_area)(struct file *, unsigned long,
unsigned long, unsigned long, unsigned long);
int (*check_flags)(int);
- int (*dir_notify)(struct file *, unsigned long);
};
locking rules:
@@ -424,7 +423,6 @@ sendfile: no
sendpage: no
get_unmapped_area: no
check_flags: no
-dir_notify: no
->llseek() locking has moved from llseek to the individual llseek
implementations. If your fs is not using generic_file_llseek, you
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index 041cb771d50..ef19afa186a 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -733,7 +733,6 @@ struct file_operations {
ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);
unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
int (*check_flags)(int);
- int (*dir_notify)(struct file *filp, unsigned long arg);
int (*flock) (struct file *, int, struct file_lock *);
ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, size_t, unsigned int);
ssize_t (*splice_read)(struct file *, struct pipe_inode_info *, size_t, unsigned int);
@@ -800,8 +799,6 @@ otherwise noted.
check_flags: called by the fcntl(2) system call for F_SETFL command
- dir_notify: called by the fcntl(2) system call for F_NOTIFY command
-
flock: called by the flock(2) system call
splice_write: called by the VFS to splice data from a pipe to a file. This
diff --git a/fs/bad_inode.c b/fs/bad_inode.c
index 5f1538c03b1..a05287a23f6 100644
--- a/fs/bad_inode.c
+++ b/fs/bad_inode.c
@@ -132,11 +132,6 @@ static int bad_file_check_flags(int flags)
return -EIO;
}
-static int bad_file_dir_notify(struct file *file, unsigned long arg)
-{
- return -EIO;
-}
-
static int bad_file_flock(struct file *filp, int cmd, struct file_lock *fl)
{
return -EIO;
@@ -179,7 +174,6 @@ static const struct file_operations bad_file_ops =
.sendpage = bad_file_sendpage,
.get_unmapped_area = bad_file_get_unmapped_area,
.check_flags = bad_file_check_flags,
- .dir_notify = bad_file_dir_notify,
.flock = bad_file_flock,
.splice_write = bad_file_splice_write,
.splice_read = bad_file_splice_read,
diff --git a/fs/cifs/Makefile b/fs/cifs/Makefile
index 6ba43fb346f..9948c0030e8 100644
--- a/fs/cifs/Makefile
+++ b/fs/cifs/Makefile
@@ -5,7 +5,7 @@ obj-$(CONFIG_CIFS) += cifs.o
cifs-y := cifsfs.o cifssmb.o cifs_debug.o connect.o dir.o file.o inode.o \
link.o misc.o netmisc.o smbdes.o smbencrypt.o transport.o asn1.o \
- md4.o md5.o cifs_unicode.o nterr.o xattr.o cifsencrypt.o fcntl.o \
+ md4.o md5.o cifs_unicode.o nterr.o xattr.o cifsencrypt.o \
readdir.o ioctl.o sess.o export.o cifsacl.o
cifs-$(CONFIG_CIFS_UPCALL) += cifs_spnego.o
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 0005a194a75..13ea53251dc 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -747,7 +747,6 @@ const struct file_operations cifs_file_ops = {
#endif /* CONFIG_CIFS_POSIX */
#ifdef CONFIG_CIFS_EXPERIMENTAL
- .dir_notify = cifs_dir_notify,
.setlease = cifs_setlease,
#endif /* CONFIG_CIFS_EXPERIMENTAL */
};
@@ -768,7 +767,6 @@ const struct file_operations cifs_file_direct_ops = {
#endif /* CONFIG_CIFS_POSIX */
.llseek = cifs_llseek,
#ifdef CONFIG_CIFS_EXPERIMENTAL
- .dir_notify = cifs_dir_notify,
.setlease = cifs_setlease,
#endif /* CONFIG_CIFS_EXPERIMENTAL */
};
@@ -789,7 +787,6 @@ const struct file_operations cifs_file_nobrl_ops = {
#endif /* CONFIG_CIFS_POSIX */
#ifdef CONFIG_CIFS_EXPERIMENTAL
- .dir_notify = cifs_dir_notify,
.setlease = cifs_setlease,
#endif /* CONFIG_CIFS_EXPERIMENTAL */
};
@@ -809,7 +806,6 @@ const struct file_operations cifs_file_direct_nobrl_ops = {
#endif /* CONFIG_CIFS_POSIX */
.llseek = cifs_llseek,
#ifdef CONFIG_CIFS_EXPERIMENTAL
- .dir_notify = cifs_dir_notify,
.setlease = cifs_setlease,
#endif /* CONFIG_CIFS_EXPERIMENTAL */
};
@@ -818,9 +814,6 @@ const struct file_operations cifs_dir_ops = {
.readdir = cifs_readdir,
.release = cifs_closedir,
.read = generic_read_dir,
-#ifdef CONFIG_CIFS_EXPERIMENTAL
- .dir_notify = cifs_dir_notify,
-#endif /* CONFIG_CIFS_EXPERIMENTAL */
.unlocked_ioctl = cifs_ioctl,
.llseek = generic_file_llseek,
};
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 2ce04c73d74..7ac481841f8 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -76,7 +76,6 @@ extern int cifs_file_mmap(struct file * , struct vm_area_struct *);
extern const struct file_operations cifs_dir_ops;
extern int cifs_dir_open(struct inode *inode, struct file *file);
extern int cifs_readdir(struct file *file, void *direntry, filldir_t filldir);
-extern int cifs_dir_notify(struct file *, unsigned long arg);
/* Functions related to dir entries */
extern struct dentry_operations cifs_dentry_ops;
diff --git a/fs/cifs/fcntl.c b/fs/cifs/fcntl.c
deleted file mode 100644
index 5a57581eb4b..00000000000
--- a/fs/cifs/fcntl.c
+++ /dev/null
@@ -1,118 +0,0 @@
-/*
- * fs/cifs/fcntl.c
- *
- * vfs operations that deal with the file control API
- *
- * Copyright (C) International Business Machines Corp., 2003,2004
- * Author(s): Steve French (sfrench@us.ibm.com)
- *
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-#include <linux/fs.h>
-#include <linux/stat.h>
-#include <linux/fcntl.h>
-#include "cifsglob.h"
-#include "cifsproto.h"
-#include "cifs_unicode.h"
-#include "cifs_debug.h"
-#include "cifsfs.h"
-
-static __u32 convert_to_cifs_notify_flags(unsigned long fcntl_notify_flags)
-{
- __u32 cifs_ntfy_flags = 0;
-
- /* No way on Linux VFS to ask to monitor xattr
- changes (and no stream support either */
- if (fcntl_notify_flags & DN_ACCESS)
- cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_ACCESS;
- if (fcntl_notify_flags & DN_MODIFY) {
- /* What does this mean on directories? */
- cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE |
- FILE_NOTIFY_CHANGE_SIZE;
- }
- if (fcntl_notify_flags & DN_CREATE) {
- cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_CREATION |
- FILE_NOTIFY_CHANGE_LAST_WRITE;
- }
- if (fcntl_notify_flags & DN_DELETE)
- cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE;
- if (fcntl_notify_flags & DN_RENAME) {
- /* BB review this - checking various server behaviors */
- cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_DIR_NAME |
- FILE_NOTIFY_CHANGE_FILE_NAME;
- }
- if (fcntl_notify_flags & DN_ATTRIB) {
- cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_SECURITY |
- FILE_NOTIFY_CHANGE_ATTRIBUTES;
- }
-/* if (fcntl_notify_flags & DN_MULTISHOT) {
- cifs_ntfy_flags |= ;
- } */ /* BB fixme - not sure how to handle this with CIFS yet */
-
- return cifs_ntfy_flags;
-}
-
-int cifs_dir_notify(struct file *file, unsigned long arg)
-{
- int xid;
- int rc = -EINVAL;
- int oplock = 0;
- struct cifs_sb_info *cifs_sb;
- struct cifsTconInfo *pTcon;
- char *full_path = NULL;
- __u32 filter = FILE_NOTIFY_CHANGE_NAME | FILE_NOTIFY_CHANGE_ATTRIBUTES;
- __u16 netfid;
-
- if (experimEnabled == 0)
- return 0;
-
- xid = GetXid();
- cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
- pTcon = cifs_sb->tcon;
-
- full_path = build_path_from_dentry(file->f_path.dentry);
-
- if (full_path == NULL) {
- rc = -ENOMEM;
- } else {
- cFYI(1, ("dir notify on file %s Arg 0x%lx", full_path, arg));
- rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
- GENERIC_READ | SYNCHRONIZE, 0 /* create options */,
- &netfid, &oplock, NULL, cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
- /* BB fixme - add this handle to a notify handle list */
- if (rc) {
- cFYI(1, ("Could not open directory for notify"));
- } else {
- filter = convert_to_cifs_notify_flags(arg);
- if (filter != 0) {
- rc = CIFSSMBNotify(xid, pTcon,
- 0 /* no subdirs */, netfid,
- filter, file, arg & DN_MULTISHOT,
- cifs_sb->local_nls);
- } else {
- rc = -EINVAL;
- }
- /* BB add code to close file eventually (at unmount
- it would close automatically but may be a way
- to do it easily when inode freed or when
- notify info is cleared/changed */
- cFYI(1, ("notify rc %d", rc));
- }
- }
-
- FreeXid(xid);
- return rc;
-}
diff --git a/fs/dnotify.c b/fs/dnotify.c
index 676073b8dda..b0aa2cde80b 100644
--- a/fs/dnotify.c
+++ b/fs/dnotify.c
@@ -115,9 +115,6 @@ int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
dn->dn_next = inode->i_dnotify;
inode->i_dnotify = dn;
spin_unlock(&inode->i_lock);
-
- if (filp->f_op && filp->f_op->dir_notify)
- return filp->f_op->dir_notify(filp, arg);
return 0;
out_free:
diff --git a/include/linux/fs.h b/include/linux/fs.h
index fd615986a41..be16ce01fb1 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1309,7 +1309,6 @@ struct file_operations {
ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);
unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
int (*check_flags)(int);
- int (*dir_notify)(struct file *filp, unsigned long arg);
int (*flock) (struct file *, int, struct file_lock *);
ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, loff_t *, size_t, unsigned int);
ssize_t (*splice_read)(struct file *, loff_t *, struct pipe_inode_info *, size_t, unsigned int);