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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 /fs/cifs
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>
Diffstat (limited to 'fs/cifs')
-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
4 files changed, 1 insertions, 127 deletions
diff --git a/fs/cifs/Makefile b/fs/cifs/Makefile
index 6ba43fb346fb..9948c0030e86 100644
--- a/fs/cifs/Makefile
+++ b/fs/cifs/Makefile
@@ -5,7 +5,7 @@ obj-$(CONFIG_CIFS) += cifs.o
5 5
6cifs-y := cifsfs.o cifssmb.o cifs_debug.o connect.o dir.o file.o inode.o \ 6cifs-y := cifsfs.o cifssmb.o cifs_debug.o connect.o dir.o file.o inode.o \
7 link.o misc.o netmisc.o smbdes.o smbencrypt.o transport.o asn1.o \ 7 link.o misc.o netmisc.o smbdes.o smbencrypt.o transport.o asn1.o \
8 md4.o md5.o cifs_unicode.o nterr.o xattr.o cifsencrypt.o fcntl.o \ 8 md4.o md5.o cifs_unicode.o nterr.o xattr.o cifsencrypt.o \
9 readdir.o ioctl.o sess.o export.o cifsacl.o 9 readdir.o ioctl.o sess.o export.o cifsacl.o
10 10
11cifs-$(CONFIG_CIFS_UPCALL) += cifs_spnego.o 11cifs-$(CONFIG_CIFS_UPCALL) += cifs_spnego.o
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 0005a194a75c..13ea53251dcf 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -747,7 +747,6 @@ const struct file_operations cifs_file_ops = {
747#endif /* CONFIG_CIFS_POSIX */ 747#endif /* CONFIG_CIFS_POSIX */
748 748
749#ifdef CONFIG_CIFS_EXPERIMENTAL 749#ifdef CONFIG_CIFS_EXPERIMENTAL
750 .dir_notify = cifs_dir_notify,
751 .setlease = cifs_setlease, 750 .setlease = cifs_setlease,
752#endif /* CONFIG_CIFS_EXPERIMENTAL */ 751#endif /* CONFIG_CIFS_EXPERIMENTAL */
753}; 752};
@@ -768,7 +767,6 @@ const struct file_operations cifs_file_direct_ops = {
768#endif /* CONFIG_CIFS_POSIX */ 767#endif /* CONFIG_CIFS_POSIX */
769 .llseek = cifs_llseek, 768 .llseek = cifs_llseek,
770#ifdef CONFIG_CIFS_EXPERIMENTAL 769#ifdef CONFIG_CIFS_EXPERIMENTAL
771 .dir_notify = cifs_dir_notify,
772 .setlease = cifs_setlease, 770 .setlease = cifs_setlease,
773#endif /* CONFIG_CIFS_EXPERIMENTAL */ 771#endif /* CONFIG_CIFS_EXPERIMENTAL */
774}; 772};
@@ -789,7 +787,6 @@ const struct file_operations cifs_file_nobrl_ops = {
789#endif /* CONFIG_CIFS_POSIX */ 787#endif /* CONFIG_CIFS_POSIX */
790 788
791#ifdef CONFIG_CIFS_EXPERIMENTAL 789#ifdef CONFIG_CIFS_EXPERIMENTAL
792 .dir_notify = cifs_dir_notify,
793 .setlease = cifs_setlease, 790 .setlease = cifs_setlease,
794#endif /* CONFIG_CIFS_EXPERIMENTAL */ 791#endif /* CONFIG_CIFS_EXPERIMENTAL */
795}; 792};
@@ -809,7 +806,6 @@ const struct file_operations cifs_file_direct_nobrl_ops = {
809#endif /* CONFIG_CIFS_POSIX */ 806#endif /* CONFIG_CIFS_POSIX */
810 .llseek = cifs_llseek, 807 .llseek = cifs_llseek,
811#ifdef CONFIG_CIFS_EXPERIMENTAL 808#ifdef CONFIG_CIFS_EXPERIMENTAL
812 .dir_notify = cifs_dir_notify,
813 .setlease = cifs_setlease, 809 .setlease = cifs_setlease,
814#endif /* CONFIG_CIFS_EXPERIMENTAL */ 810#endif /* CONFIG_CIFS_EXPERIMENTAL */
815}; 811};
@@ -818,9 +814,6 @@ const struct file_operations cifs_dir_ops = {
818 .readdir = cifs_readdir, 814 .readdir = cifs_readdir,
819 .release = cifs_closedir, 815 .release = cifs_closedir,
820 .read = generic_read_dir, 816 .read = generic_read_dir,
821#ifdef CONFIG_CIFS_EXPERIMENTAL
822 .dir_notify = cifs_dir_notify,
823#endif /* CONFIG_CIFS_EXPERIMENTAL */
824 .unlocked_ioctl = cifs_ioctl, 817 .unlocked_ioctl = cifs_ioctl,
825 .llseek = generic_file_llseek, 818 .llseek = generic_file_llseek,
826}; 819};
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 2ce04c73d74e..7ac481841f87 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 *);
76extern const struct file_operations cifs_dir_ops; 76extern const struct file_operations cifs_dir_ops;
77extern int cifs_dir_open(struct inode *inode, struct file *file); 77extern int cifs_dir_open(struct inode *inode, struct file *file);
78extern int cifs_readdir(struct file *file, void *direntry, filldir_t filldir); 78extern int cifs_readdir(struct file *file, void *direntry, filldir_t filldir);
79extern int cifs_dir_notify(struct file *, unsigned long arg);
80 79
81/* Functions related to dir entries */ 80/* Functions related to dir entries */
82extern struct dentry_operations cifs_dentry_ops; 81extern struct dentry_operations cifs_dentry_ops;
diff --git a/fs/cifs/fcntl.c b/fs/cifs/fcntl.c
deleted file mode 100644
index 5a57581eb4b2..000000000000
--- a/fs/cifs/fcntl.c
+++ /dev/null
@@ -1,118 +0,0 @@
1/*
2 * fs/cifs/fcntl.c
3 *
4 * vfs operations that deal with the file control API
5 *
6 * Copyright (C) International Business Machines Corp., 2003,2004
7 * Author(s): Steve French (sfrench@us.ibm.com)
8 *
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23#include <linux/fs.h>
24#include <linux/stat.h>
25#include <linux/fcntl.h>
26#include "cifsglob.h"
27#include "cifsproto.h"
28#include "cifs_unicode.h"
29#include "cifs_debug.h"
30#include "cifsfs.h"
31
32static __u32 convert_to_cifs_notify_flags(unsigned long fcntl_notify_flags)
33{
34 __u32 cifs_ntfy_flags = 0;
35
36 /* No way on Linux VFS to ask to monitor xattr
37 changes (and no stream support either */
38 if (fcntl_notify_flags & DN_ACCESS)
39 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_ACCESS;
40 if (fcntl_notify_flags & DN_MODIFY) {
41 /* What does this mean on directories? */
42 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE |
43 FILE_NOTIFY_CHANGE_SIZE;
44 }
45 if (fcntl_notify_flags & DN_CREATE) {
46 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_CREATION |
47 FILE_NOTIFY_CHANGE_LAST_WRITE;
48 }
49 if (fcntl_notify_flags & DN_DELETE)
50 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE;
51 if (fcntl_notify_flags & DN_RENAME) {
52 /* BB review this - checking various server behaviors */
53 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_DIR_NAME |
54 FILE_NOTIFY_CHANGE_FILE_NAME;
55 }
56 if (fcntl_notify_flags & DN_ATTRIB) {
57 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_SECURITY |
58 FILE_NOTIFY_CHANGE_ATTRIBUTES;
59 }
60/* if (fcntl_notify_flags & DN_MULTISHOT) {
61 cifs_ntfy_flags |= ;
62 } */ /* BB fixme - not sure how to handle this with CIFS yet */
63
64 return cifs_ntfy_flags;
65}
66
67int cifs_dir_notify(struct file *file, unsigned long arg)
68{
69 int xid;
70 int rc = -EINVAL;
71 int oplock = 0;
72 struct cifs_sb_info *cifs_sb;
73 struct cifsTconInfo *pTcon;
74 char *full_path = NULL;
75 __u32 filter = FILE_NOTIFY_CHANGE_NAME | FILE_NOTIFY_CHANGE_ATTRIBUTES;
76 __u16 netfid;
77
78 if (experimEnabled == 0)
79 return 0;
80
81 xid = GetXid();
82 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
83 pTcon = cifs_sb->tcon;
84
85 full_path = build_path_from_dentry(file->f_path.dentry);
86
87 if (full_path == NULL) {
88 rc = -ENOMEM;
89 } else {
90 cFYI(1, ("dir notify on file %s Arg 0x%lx", full_path, arg));
91 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
92 GENERIC_READ | SYNCHRONIZE, 0 /* create options */,
93 &netfid, &oplock, NULL, cifs_sb->local_nls,
94 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
95 /* BB fixme - add this handle to a notify handle list */
96 if (rc) {
97 cFYI(1, ("Could not open directory for notify"));
98 } else {
99 filter = convert_to_cifs_notify_flags(arg);
100 if (filter != 0) {
101 rc = CIFSSMBNotify(xid, pTcon,
102 0 /* no subdirs */, netfid,
103 filter, file, arg & DN_MULTISHOT,
104 cifs_sb->local_nls);
105 } else {
106 rc = -EINVAL;
107 }
108 /* BB add code to close file eventually (at unmount
109 it would close automatically but may be a way
110 to do it easily when inode freed or when
111 notify info is cleared/changed */
112 cFYI(1, ("notify rc %d", rc));
113 }
114 }
115
116 FreeXid(xid);
117 return rc;
118}