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authorLinus Torvalds <torvalds@linux-foundation.org>2008-07-26 20:23:44 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-26 20:23:44 -0700
commit4836e3007882984279ca63d3c42bf0b14616eb78 (patch)
tree28bf22726964e068b825491d71a141eefedbe5f8 /fs
parent5c7c204aeca51ccfad63caab4fcdc5d8026c0fd8 (diff)
parent4e1e018ecc6f7bfd10fc75b3ff9715cc8164e0a2 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (39 commits) [PATCH] fix RLIM_NOFILE handling [PATCH] get rid of corner case in dup3() entirely [PATCH] remove remaining namei_{32,64}.h crap [PATCH] get rid of indirect users of namei.h [PATCH] get rid of __user_path_lookup_open [PATCH] f_count may wrap around [PATCH] dup3 fix [PATCH] don't pass nameidata to __ncp_lookup_validate() [PATCH] don't pass nameidata to gfs2_lookupi() [PATCH] new (local) helper: user_path_parent() [PATCH] sanitize __user_walk_fd() et.al. [PATCH] preparation to __user_walk_fd cleanup [PATCH] kill nameidata passing to permission(), rename to inode_permission() [PATCH] take noexec checks to very few callers that care Re: [PATCH 3/6] vfs: open_exec cleanup [patch 4/4] vfs: immutable inode checking cleanup [patch 3/4] fat: dont call notify_change [patch 2/4] vfs: utimes cleanup [patch 1/4] vfs: utimes: move owner check into inode_change_ok() [PATCH] vfs: use kstrdup() and check failing allocation ...
Diffstat (limited to 'fs')
-rw-r--r--fs/affs/file.c4
-rw-r--r--fs/afs/internal.h4
-rw-r--r--fs/afs/security.c2
-rw-r--r--fs/aio.c6
-rw-r--r--fs/attr.c7
-rw-r--r--fs/bad_inode.c3
-rw-r--r--fs/cifs/cifsfs.c2
-rw-r--r--fs/coda/dir.c4
-rw-r--r--fs/coda/pioctl.c20
-rw-r--r--fs/compat.c20
-rw-r--r--fs/ecryptfs/inode.c21
-rw-r--r--fs/exec.c81
-rw-r--r--fs/ext2/acl.c2
-rw-r--r--fs/ext2/acl.h2
-rw-r--r--fs/ext3/acl.c2
-rw-r--r--fs/ext3/acl.h2
-rw-r--r--fs/ext4/acl.c2
-rw-r--r--fs/ext4/acl.h2
-rw-r--r--fs/fat/file.c15
-rw-r--r--fs/fcntl.c33
-rw-r--r--fs/fifo.c8
-rw-r--r--fs/file.c9
-rw-r--r--fs/file_table.c10
-rw-r--r--fs/fuse/dir.c6
-rw-r--r--fs/fuse/file.c2
-rw-r--r--fs/gfs2/inode.c6
-rw-r--r--fs/gfs2/inode.h2
-rw-r--r--fs/gfs2/ops_export.c2
-rw-r--r--fs/gfs2/ops_inode.c16
-rw-r--r--fs/gfs2/super.c2
-rw-r--r--fs/hfs/inode.c7
-rw-r--r--fs/hfsplus/inode.c6
-rw-r--r--fs/hostfs/hostfs_kern.c2
-rw-r--r--fs/hpfs/namei.c2
-rw-r--r--fs/hppfs/hppfs.c7
-rw-r--r--fs/inotify_user.c22
-rw-r--r--fs/jffs2/acl.c2
-rw-r--r--fs/jffs2/acl.h2
-rw-r--r--fs/jfs/acl.c2
-rw-r--r--fs/jfs/jfs_acl.h2
-rw-r--r--fs/namei.c354
-rw-r--r--fs/namespace.c106
-rw-r--r--fs/ncpfs/dir.c4
-rw-r--r--fs/nfs/dir.c11
-rw-r--r--fs/nfsd/nfsctl.c1
-rw-r--r--fs/nfsd/nfsfh.c2
-rw-r--r--fs/nfsd/vfs.c14
-rw-r--r--fs/ntfs/file.c2
-rw-r--r--fs/ocfs2/file.c2
-rw-r--r--fs/ocfs2/file.h3
-rw-r--r--fs/open.c179
-rw-r--r--fs/pipe.c51
-rw-r--r--fs/proc/base.c3
-rw-r--r--fs/proc/inode.c5
-rw-r--r--fs/proc/proc_sysctl.c429
-rw-r--r--fs/reiserfs/xattr.c2
-rw-r--r--fs/smbfs/file.c4
-rw-r--r--fs/splice.c4
-rw-r--r--fs/stat.c32
-rw-r--r--fs/ubifs/file.c1
-rw-r--r--fs/utimes.c139
-rw-r--r--fs/xattr.c98
-rw-r--r--fs/xfs/linux-2.6/xfs_ioctl.c14
-rw-r--r--fs/xfs/linux-2.6/xfs_iops.c3
-rw-r--r--fs/xfs/linux-2.6/xfs_lrw.c2
65 files changed, 796 insertions, 1020 deletions
diff --git a/fs/affs/file.c b/fs/affs/file.c
index 6eac7bdeec94..1377b1240b6e 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -46,8 +46,6 @@ const struct inode_operations affs_file_inode_operations = {
static int
affs_file_open(struct inode *inode, struct file *filp)
{
- if (atomic_read(&filp->f_count) != 1)
- return 0;
pr_debug("AFFS: open(%lu,%d)\n",
inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt));
atomic_inc(&AFFS_I(inode)->i_opencnt);
@@ -57,8 +55,6 @@ affs_file_open(struct inode *inode, struct file *filp)
static int
affs_file_release(struct inode *inode, struct file *filp)
{
- if (atomic_read(&filp->f_count) != 0)
- return 0;
pr_debug("AFFS: release(%lu, %d)\n",
inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt));
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 7102824ba847..3cb6920ff30b 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -469,8 +469,6 @@ extern bool afs_cm_incoming_call(struct afs_call *);
extern const struct inode_operations afs_dir_inode_operations;
extern const struct file_operations afs_dir_file_operations;
-extern int afs_permission(struct inode *, int, struct nameidata *);
-
/*
* file.c
*/
@@ -605,7 +603,7 @@ extern void afs_clear_permits(struct afs_vnode *);
extern void afs_cache_permit(struct afs_vnode *, struct key *, long);
extern void afs_zap_permits(struct rcu_head *);
extern struct key *afs_request_key(struct afs_cell *);
-extern int afs_permission(struct inode *, int, struct nameidata *);
+extern int afs_permission(struct inode *, int);
/*
* server.c
diff --git a/fs/afs/security.c b/fs/afs/security.c
index 3bcbeceba1bb..3ef504370034 100644
--- a/fs/afs/security.c
+++ b/fs/afs/security.c
@@ -284,7 +284,7 @@ static int afs_check_permit(struct afs_vnode *vnode, struct key *key,
* - AFS ACLs are attached to directories only, and a file is controlled by its
* parent directory's ACL
*/
-int afs_permission(struct inode *inode, int mask, struct nameidata *nd)
+int afs_permission(struct inode *inode, int mask)
{
struct afs_vnode *vnode = AFS_FS_I(inode);
afs_access_t uninitialized_var(access);
diff --git a/fs/aio.c b/fs/aio.c
index 0051fd94b44e..f658441d5666 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -512,8 +512,8 @@ static void aio_fput_routine(struct work_struct *data)
*/
static int __aio_put_req(struct kioctx *ctx, struct kiocb *req)
{
- dprintk(KERN_DEBUG "aio_put(%p): f_count=%d\n",
- req, atomic_read(&req->ki_filp->f_count));
+ dprintk(KERN_DEBUG "aio_put(%p): f_count=%ld\n",
+ req, atomic_long_read(&req->ki_filp->f_count));
assert_spin_locked(&ctx->ctx_lock);
@@ -528,7 +528,7 @@ static int __aio_put_req(struct kioctx *ctx, struct kiocb *req)
/* Must be done under the lock to serialise against cancellation.
* Call this aio_fput as it duplicates fput via the fput_work.
*/
- if (unlikely(atomic_dec_and_test(&req->ki_filp->f_count))) {
+ if (unlikely(atomic_long_dec_and_test(&req->ki_filp->f_count))) {
get_ioctx(ctx);
spin_lock(&fput_lock);
list_add(&req->ki_list, &fput_head);
diff --git a/fs/attr.c b/fs/attr.c
index 966b73e25f82..26c71ba1eed4 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -51,7 +51,7 @@ int inode_change_ok(struct inode *inode, struct iattr *attr)
}
/* Check for setting the inode time. */
- if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) {
+ if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)) {
if (!is_owner_or_cap(inode))
goto error;
}
@@ -108,6 +108,11 @@ int notify_change(struct dentry * dentry, struct iattr * attr)
struct timespec now;
unsigned int ia_valid = attr->ia_valid;
+ if (ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID | ATTR_TIMES_SET)) {
+ if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+ return -EPERM;
+ }
+
now = current_fs_time(inode->i_sb);
attr->ia_ctime = now;
diff --git a/fs/bad_inode.c b/fs/bad_inode.c
index f1c2ea8342f5..5f1538c03b1b 100644
--- a/fs/bad_inode.c
+++ b/fs/bad_inode.c
@@ -243,8 +243,7 @@ static int bad_inode_readlink(struct dentry *dentry, char __user *buffer,
return -EIO;
}
-static int bad_inode_permission(struct inode *inode, int mask,
- struct nameidata *nd)
+static int bad_inode_permission(struct inode *inode, int mask)
{
return -EIO;
}
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index fe5f6809cba6..1ec7076f7b24 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -267,7 +267,7 @@ cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
return 0;
}
-static int cifs_permission(struct inode *inode, int mask, struct nameidata *nd)
+static int cifs_permission(struct inode *inode, int mask)
{
struct cifs_sb_info *cifs_sb;
diff --git a/fs/coda/dir.c b/fs/coda/dir.c
index 3d2580e00a3e..c5916228243c 100644
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@@ -137,9 +137,11 @@ exit:
}
-int coda_permission(struct inode *inode, int mask, struct nameidata *nd)
+int coda_permission(struct inode *inode, int mask)
{
int error = 0;
+
+ mask &= MAY_READ | MAY_WRITE | MAY_EXEC;
if (!mask)
return 0;
diff --git a/fs/coda/pioctl.c b/fs/coda/pioctl.c
index c21a1f552a63..c51365422aa8 100644
--- a/fs/coda/pioctl.c
+++ b/fs/coda/pioctl.c
@@ -24,8 +24,7 @@
#include <linux/coda_psdev.h>
/* pioctl ops */
-static int coda_ioctl_permission(struct inode *inode, int mask,
- struct nameidata *nd);
+static int coda_ioctl_permission(struct inode *inode, int mask);
static int coda_pioctl(struct inode * inode, struct file * filp,
unsigned int cmd, unsigned long user_data);
@@ -42,8 +41,7 @@ const struct file_operations coda_ioctl_operations = {
};
/* the coda pioctl inode ops */
-static int coda_ioctl_permission(struct inode *inode, int mask,
- struct nameidata *nd)
+static int coda_ioctl_permission(struct inode *inode, int mask)
{
return 0;
}
@@ -51,7 +49,7 @@ static int coda_ioctl_permission(struct inode *inode, int mask,
static int coda_pioctl(struct inode * inode, struct file * filp,
unsigned int cmd, unsigned long user_data)
{
- struct nameidata nd;
+ struct path path;
int error;
struct PioctlData data;
struct inode *target_inode = NULL;
@@ -66,21 +64,21 @@ static int coda_pioctl(struct inode * inode, struct file * filp,
* Look up the pathname. Note that the pathname is in
* user memory, and namei takes care of this
*/
- if ( data.follow ) {
- error = user_path_walk(data.path, &nd);
+ if (data.follow) {
+ error = user_path(data.path, &path);
} else {
- error = user_path_walk_link(data.path, &nd);
+ error = user_lpath(data.path, &path);
}
if ( error ) {
return error;
} else {
- target_inode = nd.path.dentry->d_inode;
+ target_inode = path.dentry->d_inode;
}
/* return if it is not a Coda inode */
if ( target_inode->i_sb != inode->i_sb ) {
- path_put(&nd.path);
+ path_put(&path);
return -EINVAL;
}
@@ -89,7 +87,7 @@ static int coda_pioctl(struct inode * inode, struct file * filp,
error = venus_pioctl(inode->i_sb, &(cnp->c_fid), cmd, &data);
- path_put(&nd.path);
+ path_put(&path);
return error;
}
diff --git a/fs/compat.c b/fs/compat.c
index 106eba28ec5a..c9d1472e65c5 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -234,18 +234,18 @@ static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *
* The following statfs calls are copies of code from fs/open.c and
* should be checked against those from time to time
*/
-asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
+asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf)
{
- struct nameidata nd;
+ struct path path;
int error;
- error = user_path_walk(path, &nd);
+ error = user_path(pathname, &path);
if (!error) {
struct kstatfs tmp;
- error = vfs_statfs(nd.path.dentry, &tmp);
+ error = vfs_statfs(path.dentry, &tmp);
if (!error)
error = put_compat_statfs(buf, &tmp);
- path_put(&nd.path);
+ path_put(&path);
}
return error;
}
@@ -299,21 +299,21 @@ static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstat
return 0;
}
-asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
+asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf)
{
- struct nameidata nd;
+ struct path path;
int error;
if (sz != sizeof(*buf))
return -EINVAL;
- error = user_path_walk(path, &nd);
+ error = user_path(pathname, &path);
if (!error) {
struct kstatfs tmp;
- error = vfs_statfs(nd.path.dentry, &tmp);
+ error = vfs_statfs(path.dentry, &tmp);
if (!error)
error = put_compat_statfs64(buf, &tmp);
- path_put(&nd.path);
+ path_put(&path);
}
return error;
}
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index d755455e3bff..89209f00f9c7 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -465,7 +465,6 @@ static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry,
int rc;
struct dentry *lower_dentry;
struct dentry *lower_dir_dentry;
- umode_t mode;
char *encoded_symname;
int encoded_symlen;
struct ecryptfs_crypt_stat *crypt_stat = NULL;
@@ -473,7 +472,6 @@ static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry,
lower_dentry = ecryptfs_dentry_to_lower(dentry);
dget(lower_dentry);
lower_dir_dentry = lock_parent(lower_dentry);
- mode = S_IALLUGO;
encoded_symlen = ecryptfs_encode_filename(crypt_stat, symname,
strlen(symname),
&encoded_symname);
@@ -482,7 +480,7 @@ static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry,
goto out_lock;
}
rc = vfs_symlink(lower_dir_dentry->d_inode, lower_dentry,
- encoded_symname, mode);
+ encoded_symname);
kfree(encoded_symname);
if (rc || !lower_dentry->d_inode)
goto out_lock;
@@ -830,22 +828,9 @@ out:
}
static int
-ecryptfs_permission(struct inode *inode, int mask, struct nameidata *nd)
+ecryptfs_permission(struct inode *inode, int mask)
{
- int rc;
-
- if (nd) {
- struct vfsmount *vfsmnt_save = nd->path.mnt;
- struct dentry *dentry_save = nd->path.dentry;
-
- nd->path.mnt = ecryptfs_dentry_to_lower_mnt(nd->path.dentry);
- nd->path.dentry = ecryptfs_dentry_to_lower(nd->path.dentry);
- rc = permission(ecryptfs_inode_to_lower(inode), mask, nd);
- nd->path.mnt = vfsmnt_save;
- nd->path.dentry = dentry_save;
- } else
- rc = permission(ecryptfs_inode_to_lower(inode), mask, NULL);
- return rc;
+ return inode_permission(ecryptfs_inode_to_lower(inode), mask);
}
/**
diff --git a/fs/exec.c b/fs/exec.c
index b8792a131533..9696bbf0f0b1 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -106,11 +106,17 @@ static inline void put_binfmt(struct linux_binfmt * fmt)
*/
asmlinkage long sys_uselib(const char __user * library)
{
- struct file * file;
+ struct file *file;
struct nameidata nd;
- int error;
-
- error = __user_path_lookup_open(library, LOOKUP_FOLLOW, &nd, FMODE_READ|FMODE_EXEC);
+ char *tmp = getname(library);
+ int error = PTR_ERR(tmp);
+
+ if (!IS_ERR(tmp)) {
+ error = path_lookup_open(AT_FDCWD, tmp,
+ LOOKUP_FOLLOW, &nd,
+ FMODE_READ|FMODE_EXEC);
+ putname(tmp);
+ }
if (error)
goto out;
@@ -118,7 +124,11 @@ asmlinkage long sys_uselib(const char __user * library)
if (!S_ISREG(nd.path.dentry->d_inode->i_mode))
goto exit;
- error = vfs_permission(&nd, MAY_READ | MAY_EXEC);
+ error = -EACCES;
+ if (nd.path.mnt->mnt_flags & MNT_NOEXEC)
+ goto exit;
+
+ error = vfs_permission(&nd, MAY_READ | MAY_EXEC | MAY_OPEN);
if (error)
goto exit;
@@ -656,38 +666,43 @@ EXPORT_SYMBOL(setup_arg_pages);
struct file *open_exec(const char *name)
{
struct nameidata nd;
- int err;
struct file *file;
+ int err;
- err = path_lookup_open(AT_FDCWD, name, LOOKUP_FOLLOW, &nd, FMODE_READ|FMODE_EXEC);
- file = ERR_PTR(err);
-
- if (!err) {
- struct inode *inode = nd.path.dentry->d_inode;
- file = ERR_PTR(-EACCES);
- if (S_ISREG(inode->i_mode)) {
- int err = vfs_permission(&nd, MAY_EXEC);
- file = ERR_PTR(err);
- if (!err) {
- file = nameidata_to_filp(&nd,
- O_RDONLY|O_LARGEFILE);
- if (!IS_ERR(file)) {
- err = deny_write_access(file);
- if (err) {
- fput(file);
- file = ERR_PTR(err);
- }
- }
-out:
- return file;
- }
- }
- release_open_intent(&nd);
- path_put(&nd.path);
+ err = path_lookup_open(AT_FDCWD, name, LOOKUP_FOLLOW, &nd,
+ FMODE_READ|FMODE_EXEC);
+ if (err)
+ goto out;
+
+ err = -EACCES;
+ if (!S_ISREG(nd.path.dentry->d_inode->i_mode))
+ goto out_path_put;
+
+ if (nd.path.mnt->mnt_flags & MNT_NOEXEC)
+ goto out_path_put;
+
+ err = vfs_permission(&nd, MAY_EXEC | MAY_OPEN);
+ if (err)
+ goto out_path_put;
+
+ file = nameidata_to_filp(&nd, O_RDONLY|O_LARGEFILE);
+ if (IS_ERR(file))
+ return file;
+
+ err = deny_write_access(file);
+ if (err) {
+ fput(file);
+ goto out;
}
- goto out;
-}
+ return file;
+
+ out_path_put:
+ release_open_intent(&nd);
+ path_put(&nd.path);
+ out:
+ return ERR_PTR(err);
+}
EXPORT_SYMBOL(open_exec);
int kernel_read(struct file *file, unsigned long offset,
diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
index e58669e1b87c..ae8c4f850b27 100644
--- a/fs/ext2/acl.c
+++ b/fs/ext2/acl.c
@@ -294,7 +294,7 @@ ext2_check_acl(struct inode *inode, int mask)
}
int
-ext2_permission(struct inode *inode, int mask, struct nameidata *nd)
+ext2_permission(struct inode *inode, int mask)
{
return generic_permission(inode, mask, ext2_check_acl);
}
diff --git a/fs/ext2/acl.h b/fs/ext2/acl.h
index 0bde85bafe38..b42cf578554b 100644
--- a/fs/ext2/acl.h
+++ b/fs/ext2/acl.h
@@ -58,7 +58,7 @@ static inline int ext2_acl_count(size_t size)
#define EXT2_ACL_NOT_CACHED ((void *)-1)
/* acl.c */
-extern int ext2_permission (struct inode *, int, struct nameidata *);
+extern int ext2_permission (struct inode *, int);
extern int ext2_acl_chmod (struct inode *);
extern int ext2_init_acl (struct inode *, struct inode *);
diff --git a/fs/ext3/acl.c b/fs/ext3/acl.c
index a754d1848173..b60bb241880c 100644
--- a/fs/ext3/acl.c
+++ b/fs/ext3/acl.c
@@ -299,7 +299,7 @@ ext3_check_acl(struct inode *inode, int mask)
}
int
-ext3_permission(struct inode *inode, int mask, struct nameidata *nd)
+ext3_permission(struct inode *inode, int mask)
{
return generic_permission(inode, mask, ext3_check_acl);
}
diff --git a/fs/ext3/acl.h b/fs/ext3/acl.h
index 0d1e6279cbfd..42da16b8cac0 100644
--- a/fs/ext3/acl.h
+++ b/fs/ext3/acl.h
@@ -58,7 +58,7 @@ static inline int ext3_acl_count(size_t size)
#define EXT3_ACL_NOT_CACHED ((void *)-1)
/* acl.c */
-extern int ext3_permission (struct inode *, int, struct nameidata *);
+extern int ext3_permission (struct inode *, int);
extern int ext3_acl_chmod (struct inode *);
extern int ext3_init_acl (handle_t *, struct inode *, struct inode *);
diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index 3c8dab880d91..c7d04e165446 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -299,7 +299,7 @@ ext4_check_acl(struct inode *inode, int mask)
}
int
-ext4_permission(struct inode *inode, int mask, struct nameidata *nd)
+ext4_permission(struct inode *inode, int mask)
{
return generic_permission(inode, mask, ext4_check_acl);
}
diff --git a/fs/ext4/acl.h b/fs/ext4/acl.h
index 26a5c1abf147..cd2b855a07d6 100644
--- a/fs/ext4/acl.h
+++ b/fs/ext4/acl.h
@@ -58,7 +58,7 @@ static inline int ext4_acl_count(size_t size)
#define EXT4_ACL_NOT_CACHED ((void *)-1)
/* acl.c */
-extern int ext4_permission (struct inode *, int, struct nameidata *);
+extern int ext4_permission (struct inode *, int);
extern int ext4_acl_chmod (struct inode *);
extern int ext4_init_acl (handle_t *, struct inode *, struct inode *);
diff --git a/fs/fat/file.c b/fs/fat/file.c
index c672df4036e9..8707a8cfa02c 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -15,6 +15,8 @@
#include <linux/writeback.h>
#include <linux/backing-dev.h>
#include <linux/blkdev.h>
+#include <linux/fsnotify.h>
+#include <linux/security.h>
int fat_generic_ioctl(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
@@ -64,6 +66,7 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp,
/* Equivalent to a chmod() */
ia.ia_valid = ATTR_MODE | ATTR_CTIME;
+ ia.ia_ctime = current_fs_time(inode->i_sb);
if (is_dir) {
ia.ia_mode = MSDOS_MKMODE(attr,
S_IRWXUGO & ~sbi->options.fs_dmask)
@@ -90,11 +93,21 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp,
}
}
+ /*
+ * The security check is questionable... We single
+ * out the RO attribute for checking by the security
+ * module, just because it maps to a file mode.
+ */
+ err = security_inode_setattr(filp->f_path.dentry, &ia);
+ if (err)
+ goto up;
+
/* This MUST be done before doing anything irreversible... */
- err = notify_change(filp->f_path.dentry, &ia);
+ err = fat_setattr(filp->f_path.dentry, &ia);
if (err)
goto up;
+ fsnotify_change(filp->f_path.dentry, ia.ia_valid);
if (sbi->options.sys_immutable) {
if (attr & ATTR_SYS)
inode->i_flags |= S_IMMUTABLE;
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 9679fcbdeaa0..61d625136813 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -64,11 +64,6 @@ static int locate_fd(unsigned int orig_start, int cloexec)
struct fdtable *fdt;
spin_lock(&files->file_lock);
-
- error = -EINVAL;
- if (orig_start >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
- goto out;
-
repeat:
fdt = files_fdtable(files);
/*
@@ -83,10 +78,6 @@ repeat:
if (start < fdt->max_fds)
newfd = find_next_zero_bit(fdt->open_fds->fds_bits,
fdt->max_fds, start);
-
- error = -EMFILE;
- if (newfd >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
- goto out;
error = expand_files(files, newfd);
if (error < 0)
@@ -135,20 +126,20 @@ asmlinkage long sys_dup3(unsigned int oldfd, unsigned int newfd, int flags)
if ((flags & ~O_CLOEXEC) != 0)
return -EINVAL;
+ if (unlikely(oldfd == newfd))
+ return -EINVAL;
+
spin_lock(&files->file_lock);
if (!(file = fcheck(oldfd)))
goto out_unlock;
- err = newfd;
- if (newfd == oldfd)
- goto out_unlock;
- err = -EBADF;
- if (newfd >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
- goto out_unlock;
get_file(file); /* We are now finished with oldfd */
err = expand_files(files, newfd);
- if (err < 0)
+ if (unlikely(err < 0)) {
+ if (err == -EMFILE)
+ err = -EBADF;
goto out_fput;
+ }
/* To avoid races with open() and dup(), we will mark the fd as
* in-use in the open-file bitmap throughout the entire dup2()
@@ -189,6 +180,14 @@ out_fput:
asmlinkage long sys_dup2(unsigned int oldfd, unsigned int newfd)
{
+ if (unlikely(newfd == oldfd)) { /* corner case */
+ struct files_struct *files = current->files;
+ rcu_read_lock();
+ if (!fcheck_files(files, oldfd))
+ oldfd = -EBADF;
+ rcu_read_unlock();
+ return oldfd;
+ }
return sys_dup3(oldfd, newfd, 0);
}
@@ -321,6 +320,8 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg,
switch (cmd) {
case F_DUPFD:
case F_DUPFD_CLOEXEC:
+ if (arg >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
+ break;
get_file(filp);
err = dupfd(filp, arg, cmd == F_DUPFD_CLOEXEC);
break;
diff --git a/fs/fifo.c b/fs/fifo.c
index 9785e36f81e7..987bf9411495 100644
--- a/fs/fifo.c
+++ b/fs/fifo.c
@@ -57,7 +57,7 @@ static int fifo_open(struct inode *inode, struct file *filp)
* POSIX.1 says that O_NONBLOCK means return with the FIFO
* opened, even when there is no process writing the FIFO.
*/
- filp->f_op = &read_fifo_fops;
+ filp->f_op = &read_pipefifo_fops;
pipe->r_counter++;
if (pipe->readers++ == 0)
wake_up_partner(inode);
@@ -86,7 +86,7 @@ static int fifo_open(struct inode *inode, struct file *filp)
if ((filp->f_flags & O_NONBLOCK) && !pipe->readers)
goto err;
- filp->f_op = &write_fifo_fops;
+ filp->f_op = &write_pipefifo_fops;
pipe->w_counter++;
if (!pipe->writers++)
wake_up_partner(inode);
@@ -105,7 +105,7 @@ static int fifo_open(struct inode *inode, struct file *filp)
* This implementation will NEVER block on a O_RDWR open, since
* the process can at least talk to itself.
*/
- filp->f_op = &rdwr_fifo_fops;
+ filp->f_op = &rdwr_pipefifo_fops;
pipe->readers++;
pipe->writers++;
@@ -151,5 +151,5 @@ err_nocleanup:
* depending on the access mode of the file...
*/
const struct file_operations def_fifo_fops = {
- .open = fifo_open, /* will set read or write pipe_fops */
+ .open = fifo_open, /* will set read_ or write_pipefifo_fops */
};
diff --git a/fs/file.c b/fs/file.c
index 7b3887e054d0..d8773b19fe47 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -250,9 +250,18 @@ int expand_files(struct files_struct *files, int nr)
struct fdtable *fdt;
fdt = files_fdtable(files);
+
+ /*
+ * N.B. For clone tasks sharing a files structure, this test
+ * will limit the total number of files that can be opened.
+ */
+ if (nr >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
+ return -EMFILE;
+
/* Do we need to expand? */
if (nr < fdt->max_fds)
return 0;
+
/* Can we expand? */
if (nr >= sysctl_nr_open)
return -EMFILE;
diff --git a/fs/file_table.c b/fs/file_table.c
index 83084225b4c3..f45a4493f9e7 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -120,7 +120,7 @@ struct file *get_empty_filp(void)
tsk = current;
INIT_LIST_HEAD(&f->f_u.fu_list);
- atomic_set(&f->f_count, 1);
+ atomic_long_set(&f->f_count, 1);
rwlock_init(&f->f_owner.lock);
f->f_uid = tsk->fsuid;
f->f_gid = tsk->fsgid;
@@ -219,7 +219,7 @@ EXPORT_SYMBOL(init_file);
void fput(struct file *file)
{
- if (atomic_dec_and_test(&file->f_count))
+ if (atomic_long_dec_and_test(&file->f_count))
__fput(file);
}
@@ -294,7 +294,7 @@ struct file *fget(unsigned int fd)
rcu_read_lock();
file = fcheck_files(files, fd);
if (file) {
- if (!atomic_inc_not_zero(&file->f_count)) {
+ if (!atomic_long_inc_not_zero(&file->f_count)) {
/* File object ref couldn't be taken */
rcu_read_unlock();
return NULL;
@@ -326,7 +326,7 @@ struct file *fget_light(unsigned int fd, int *fput_needed)
rcu_read_lock();
file = fcheck_files(files, fd);
if (file) {
- if (atomic_inc_not_zero(&file->f_count))
+ if (atomic_long_inc_not_zero(&file->f_count))
*fput_needed = 1;
else
/* Didn't get the reference, someone's freed */
@@ -341,7 +341,7 @@ struct file *fget_light(unsigned int fd, int *fput_needed)
void put_filp(struct file *file)
{
- if (atomic_dec_and_test(&file->f_count)) {
+ if (atomic_long_dec_and_test(&file->f_count)) {
security_file_free(file);
file_kill(file);
file_free(file);
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 51d0035ff07e..fd03330cadeb 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -898,7 +898,7 @@ static int fuse_access(struct inode *inode, int mask)
return PTR_ERR(req);
memset(&inarg, 0, sizeof(inarg));
- inarg.mask = mask;
+ inarg.mask = mask & (MAY_READ | MAY_WRITE | MAY_EXEC);
req->in.h.opcode = FUSE_ACCESS;
req->in.h.nodeid = get_node_id(inode);
req->in.numargs = 1;
@@ -927,7 +927,7 @@ static int fuse_access(struct inode *inode, int mask)
* access request is sent. Execute permission is still checked
* locally based on file mode.
*/
-static int fuse_permission(struct inode *inode, int mask, struct nameidata *nd)
+static int fuse_permission(struct inode *inode, int mask)
{
struct fuse_conn *fc = get_fuse_conn(inode);
bool refreshed = false;
@@ -962,7 +962,7 @@ static int fuse_permission(struct inode *inode, int mask, struct nameidata *nd)
exist. So if permissions are revoked this won't be
noticed immediately, only after the attribute
timeout has expired */
- } else if (nd && (nd->flags & (LOOKUP_ACCESS | LOOKUP_CHDIR))) {
+ } else if (mask & MAY_ACCESS) {
err = fuse_access(inode, mask);
} else if ((mask & MAY_EXEC) && S_ISREG(inode->i_mode)) {
if (!(inode->i_mode & S_IXUGO)) {
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 67ff2c6a8f63..2bada6bbc317 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -893,7 +893,7 @@ static ssize_t fuse_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
if (count == 0)
goto out;
- err = remove_suid(file->f_path.dentry);
+ err = file_remove_suid(file);
if (err)
goto out;
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 6da0ab355b8a..8b0806a32948 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -448,7 +448,7 @@ struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
struct qstr qstr;
struct inode *inode;
gfs2_str2qstr(&qstr, name);
- inode = gfs2_lookupi(dip, &qstr, 1, NULL);
+ inode = gfs2_lookupi(dip, &qstr, 1);
/* gfs2_lookupi has inconsistent callers: vfs
* related routines expect NULL for no entry found,
* gfs2_lookup_simple callers expect ENOENT
@@ -477,7 +477,7 @@ struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
*/
struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
- int is_root, struct nameidata *nd)
+ int is_root)
{
struct super_block *sb = dir->i_sb;
struct gfs2_inode *dip = GFS2_I(dir);
@@ -1173,7 +1173,7 @@ int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
break;
}
- tmp = gfs2_lookupi(dir, &dotdot, 1, NULL);
+ tmp = gfs2_lookupi(dir, &dotdot, 1);
if (IS_ERR(tmp)) {
error = PTR_ERR(tmp);
break;
diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h
index 6074c2506f75..58f9607d6a86 100644
--- a/fs/gfs2/inode.h
+++ b/fs/gfs2/inode.h
@@ -83,7 +83,7 @@ int gfs2_inode_refresh(struct gfs2_inode *ip);
int gfs2_dinode_dealloc(struct gfs2_inode *inode);
int gfs2_change_nlink(struct gfs2_inode *ip, int diff);
struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
- int is_root, struct nameidata *nd);
+ int is_root);
struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
unsigned int mode, dev_t dev);
int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
diff --git a/fs/gfs2/ops_export.c b/fs/gfs2/ops_export.c
index 990d9f4bc463..9cda8536530c 100644
--- a/fs/gfs2/ops_export.c
+++ b/fs/gfs2/ops_export.c
@@ -134,7 +134,7 @@ static struct dentry *gfs2_get_parent(struct dentry *child)
struct dentry *dentry;
gfs2_str2qstr(&dotdot, "..");
- inode = gfs2_lookupi(child->d_inode, &dotdot, 1, NULL);
+ inode = gfs2_lookupi(child->d_inode, &dotdot, 1);
if (!inode)
return ERR_PTR(-ENOENT);
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index 1e252dfc5294..e2c62f73a778 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -74,7 +74,7 @@ static int gfs2_create(struct inode *dir, struct dentry *dentry,
return PTR_ERR(inode);
}
- inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd);
+ inode = gfs2_lookupi(dir, &dentry->d_name, 0);
if (inode) {
if (!IS_ERR(inode)) {
gfs2_holder_uninit(ghs);
@@ -109,7 +109,7 @@ static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
dentry->d_op = &gfs2_dops;
- inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd);
+ inode = gfs2_lookupi(dir, &dentry->d_name, 0);
if (inode && IS_ERR(inode))
return ERR_CAST(inode);
@@ -915,12 +915,6 @@ int gfs2_permission(struct inode *inode, int mask)
return error;
}
-static int gfs2_iop_permission(struct inode *inode, int mask,
- struct nameidata *nd)
-{
- return gfs2_permission(inode, mask);
-}
-
static int setattr_size(struct inode *inode, struct iattr *attr)
{
struct gfs2_inode *ip = GFS2_I(inode);
@@ -1150,7 +1144,7 @@ static int gfs2_removexattr(struct dentry *dentry, const char *name)
}
const struct inode_operations gfs2_file_iops = {
- .permission = gfs2_iop_permission,
+ .permission = gfs2_permission,
.setattr = gfs2_setattr,
.getattr = gfs2_getattr,
.setxattr = gfs2_setxattr,
@@ -1169,7 +1163,7 @@ const struct inode_operations gfs2_dir_iops = {
.rmdir = gfs2_rmdir,
.mknod = gfs2_mknod,
.rename = gfs2_rename,
- .permission = gfs2_iop_permission,
+ .permission = gfs2_permission,
.setattr = gfs2_setattr,
.getattr = gfs2_getattr,
.setxattr = gfs2_setxattr,
@@ -1181,7 +1175,7 @@ const struct inode_operations gfs2_dir_iops = {
const struct inode_operations gfs2_symlink_iops = {
.readlink = gfs2_readlink,
.follow_link = gfs2_follow_link,
- .permission = gfs2_iop_permission,
+ .permission = gfs2_permission,
.setattr = gfs2_setattr,
.getattr = gfs2_getattr,
.setxattr = gfs2_setxattr,
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 63a8a902d9db..ca831991cbc2 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -389,7 +389,7 @@ int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
break;
INIT_LIST_HEAD(&jd->extent_list);
- jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1, NULL);
+ jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1);
if (!jd->jd_inode || IS_ERR(jd->jd_inode)) {
if (!jd->jd_inode)
error = -ENOENT;
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index dc4ec640e875..7e19835efa2e 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -511,8 +511,7 @@ void hfs_clear_inode(struct inode *inode)
}
}
-static int hfs_permission(struct inode *inode, int mask,
- struct nameidata *nd)
+static int hfs_permission(struct inode *inode, int mask)
{
if (S_ISREG(inode->i_mode) && mask & MAY_EXEC)
return 0;
@@ -523,8 +522,6 @@ static int hfs_file_open(struct inode *inode, struct file *file)
{
if (HFS_IS_RSRC(inode))
inode = HFS_I(inode)->rsrc_inode;
- if (atomic_read(&file->f_count) != 1)
- return 0;
atomic_inc(&HFS_I(inode)->opencnt);
return 0;
}
@@ -535,8 +532,6 @@ static int hfs_file_release(struct inode *inode, struct file *file)
if (HFS_IS_RSRC(inode))
inode = HFS_I(inode)->rsrc_inode;
- if (atomic_read(&file->f_count) != 0)
- return 0;
if (atomic_dec_and_test(&HFS_I(inode)->opencnt)) {
mutex_lock(&inode->i_mutex);
hfs_file_truncate(inode);
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index cc3b5e24339b..b085d64a2b67 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -238,7 +238,7 @@ static void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms)
perms->dev = cpu_to_be32(HFSPLUS_I(inode).dev);
}
-static int hfsplus_permission(struct inode *inode, int mask, struct nameidata *nd)
+static int hfsplus_permission(struct inode *inode, int mask)
{
/* MAY_EXEC is also used for lookup, if no x bit is set allow lookup,
* open_exec has the same test, so it's still not executable, if a x bit
@@ -254,8 +254,6 @@ static int hfsplus_file_open(struct inode *inode, struct file *file)
{
if (HFSPLUS_IS_RSRC(inode))
inode = HFSPLUS_I(inode).rsrc_inode;
- if (atomic_read(&file->f_count) != 1)
- return 0;
atomic_inc(&HFSPLUS_I(inode).opencnt);
return 0;
}
@@ -266,8 +264,6 @@ static int hfsplus_file_release(struct inode *inode, struct file *file)
if (HFSPLUS_IS_RSRC(inode))
inode = HFSPLUS_I(inode).rsrc_inode;
- if (atomic_read(&file->f_count) != 0)
- return 0;
if (atomic_dec_and_test(&HFSPLUS_I(inode).opencnt)) {
mutex_lock(&inode->i_mutex);
hfsplus_file_truncate(inode);
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 5222345ddccf..d6ecabf4d231 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -822,7 +822,7 @@ int hostfs_rename(struct inode *from_ino, struct dentry *from,
return err;
}
-int hostfs_permission(struct inode *ino, int desired, struct nameidata *nd)
+int hostfs_permission(struct inode *ino, int desired)
{
char *name;
int r = 0, w = 0, x = 0, err;
diff --git a/fs/hpfs/namei.c b/fs/hpfs/namei.c
index d256559b4104..d9c59a775449 100644
--- a/fs/hpfs/namei.c
+++ b/fs/hpfs/namei.c
@@ -415,7 +415,7 @@ again:
d_drop(dentry);
spin_lock(&dentry->d_lock);
if (atomic_read(&dentry->d_count) > 1 ||
- permission(inode, MAY_WRITE, NULL) ||
+ generic_permission(inode, MAY_WRITE, NULL) ||
!S_ISREG(inode->i_mode) ||
get_write_access(inode)) {
spin_unlock(&dentry->d_lock);
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index 65077aa90f0a..2b3d1828db99 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -655,20 +655,13 @@ static void *hppfs_follow_link(struct dentry *dentry, struct nameidata *nd)
return proc_dentry->d_inode->i_op->follow_link(proc_dentry, nd);
}
-int hppfs_permission(struct inode *inode, int mask, struct nameidata *nd)
-{
- return generic_permission(inode, mask, NULL);
-}
-
static const struct inode_operations hppfs_dir_iops = {
.lookup = hppfs_lookup,
- .permission = hppfs_permission,
};
static const struct inode_operations hppfs_link_iops = {
.readlink = hppfs_readlink,
.follow_link = hppfs_follow_link,
- .permission = hppfs_permission,
};
static struct inode *get_inode(struct super_block *sb, struct dentry *dentry)
diff --git a/fs/inotify_user.c b/fs/inotify_user.c
index fe79c25d95dc..60249429a253 100644
--- a/fs/inotify_user.c
+++ b/fs/inotify_user.c
@@ -354,20 +354,20 @@ static void inotify_dev_event_dequeue(struct inotify_device *dev)
}
/*
- * find_inode - resolve a user-given path to a specific inode and return a nd
+ * find_inode - resolve a user-given path to a specific inode
*/
-static int find_inode(const char __user *dirname, struct nameidata *nd,
+static int find_inode(const char __user *dirname, struct path *path,
unsigned flags)
{
int error;
- error = __user_walk(dirname, flags, nd);
+ error = user_path_at(AT_FDCWD, dirname, flags, path);
if (error)
return error;
/* you can only watch an inode if you have read permissions on it */
- error = vfs_permission(nd, MAY_READ);
+ error = inode_permission(path->dentry->d_inode, MAY_READ);
if (error)
- path_put(&nd->path);
+ path_put(path);
return error;
}
@@ -650,11 +650,11 @@ asmlinkage long sys_inotify_init(void)
return sys_inotify_init1(0);
}
-asmlinkage long sys_inotify_add_watch(int fd, const char __user *path, u32 mask)
+asmlinkage long sys_inotify_add_watch(int fd, const char __user *pathname, u32 mask)
{
struct inode *inode;
struct inotify_device *dev;
- struct nameidata nd;
+ struct path path;
struct file *filp;
int ret, fput_needed;
unsigned flags = 0;
@@ -674,12 +674,12 @@ asmlinkage long sys_inotify_add_watch(int fd, const char __user *path, u32 mask)
if (mask & IN_ONLYDIR)
flags |= LOOKUP_DIRECTORY;
- ret = find_inode(path, &nd, flags);
+ ret = find_inode(pathname, &path, flags);
if (unlikely(ret))
goto fput_and_out;
- /* inode held in place by reference to nd; dev by fget on fd */
- inode = nd.path.dentry->d_inode;
+ /* inode held in place by reference to path; dev by fget on fd */
+ inode = path.dentry->d_inode;
dev = filp->private_data;
mutex_lock(&dev->up_mutex);
@@ -688,7 +688,7 @@ asmlinkage long sys_inotify_add_watch(int fd, const char __user *path, u32 mask)
ret = create_watch(dev, inode, mask);
mutex_unlock(&dev->up_mutex);
- path_put(&nd.path);
+ path_put(&path);
fput_and_out:
fput_light(filp, fput_needed);
return ret;
diff --git a/fs/jffs2/acl.c b/fs/jffs2/acl.c
index 4c80404a9aba..d98713777a1b 100644
--- a/fs/jffs2/acl.c
+++ b/fs/jffs2/acl.c
@@ -314,7 +314,7 @@ static int jffs2_check_acl(struct inode *inode, int mask)
return -EAGAIN;
}
-int jffs2_permission(struct inode *inode, int mask, struct nameidata *nd)
+int jffs2_permission(struct inode *inode, int mask)
{
return generic_permission(inode, mask, jffs2_check_acl);
}
diff --git a/fs/jffs2/acl.h b/fs/jffs2/acl.h
index 0bb7f003fd80..8ca058aed384 100644
--- a/fs/jffs2/acl.h
+++ b/fs/jffs2/acl.h
@@ -28,7 +28,7 @@ struct jffs2_acl_header {
#define JFFS2_ACL_NOT_CACHED ((void *)-1)
-extern int jffs2_permission(struct inode *, int, struct nameidata *);
+extern int jffs2_permission(struct inode *, int);
extern int jffs2_acl_chmod(struct inode *);
extern int jffs2_init_acl_pre(struct inode *, struct inode *, int *);
extern int jffs2_init_acl_post(struct inode *);
diff --git a/fs/jfs/acl.c b/fs/jfs/acl.c
index 4d84bdc88299..d3e5c33665de 100644
--- a/fs/jfs/acl.c
+++ b/fs/jfs/acl.c
@@ -140,7 +140,7 @@ static int jfs_check_acl(struct inode *inode, int mask)
return -EAGAIN;
}
-int jfs_permission(struct inode *inode, int mask, struct nameidata *nd)
+int jfs_permission(struct inode *inode, int mask)
{
return generic_permission(inode, mask, jfs_check_acl);
}
diff --git a/fs/jfs/jfs_acl.h b/fs/jfs/jfs_acl.h
index 455fa4292045..88475f10a389 100644
--- a/fs/jfs/jfs_acl.h
+++ b/fs/jfs/jfs_acl.h
@@ -20,7 +20,7 @@
#ifdef CONFIG_JFS_POSIX_ACL
-int jfs_permission(struct inode *, int, struct nameidata *);
+int jfs_permission(struct inode *, int);
int jfs_init_acl(tid_t, struct inode *, struct inode *);
int jfs_setattr(struct dentry *, struct iattr *);
diff --git a/fs/namei.c b/fs/namei.c
index 01e67dddcc3d..a7b0a0b80128 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -31,7 +31,6 @@
#include <linux/file.h>
#include <linux/fcntl.h>
#include <linux/device_cgroup.h>
-#include <asm/namei.h>
#include <asm/uaccess.h>
#define ACC_MODE(x) ("\000\004\002\006"[(x)&O_ACCMODE])
@@ -185,6 +184,8 @@ int generic_permission(struct inode *inode, int mask,
{
umode_t mode = inode->i_mode;
+ mask &= MAY_READ | MAY_WRITE | MAY_EXEC;
+
if (current->fsuid == inode->i_uid)
mode >>= 6;
else {
@@ -203,7 +204,7 @@ int generic_permission(struct inode *inode, int mask,
/*
* If the DACs are ok we don't need any capability check.
*/
- if (((mode & mask & (MAY_READ|MAY_WRITE|MAY_EXEC)) == mask))
+ if ((mask & ~mode) == 0)
return 0;
check_capabilities:
@@ -226,13 +227,9 @@ int generic_permission(struct inode *inode, int mask,
return -EACCES;
}
-int permission(struct inode *inode, int mask, struct nameidata *nd)
+int inode_permission(struct inode *inode, int mask)
{
- int retval, submask;
- struct vfsmount *mnt = NULL;
-
- if (nd)
- mnt = nd->path.mnt;
+ int retval;
if (mask & MAY_WRITE) {
umode_t mode = inode->i_mode;
@@ -251,19 +248,9 @@ int permission(struct inode *inode, int mask, struct nameidata *nd)
return -EACCES;
}
- if ((mask & MAY_EXEC) && S_ISREG(inode->i_mode)) {
- /*
- * MAY_EXEC on regular files is denied if the fs is mounted
- * with the "noexec" flag.
- */
- if (mnt && (mnt->mnt_flags & MNT_NOEXEC))
- return -EACCES;
- }
-
/* Ordinary permission routines do not understand MAY_APPEND. */
- submask = mask & ~MAY_APPEND;
if (inode->i_op && inode->i_op->permission) {
- retval = inode->i_op->permission(inode, submask, nd);
+ retval = inode->i_op->permission(inode, mask);
if (!retval) {
/*
* Exec permission on a regular file is denied if none
@@ -277,7 +264,7 @@ int permission(struct inode *inode, int mask, struct nameidata *nd)
return -EACCES;
}
} else {
- retval = generic_permission(inode, submask, NULL);
+ retval = generic_permission(inode, mask, NULL);
}
if (retval)
return retval;
@@ -286,7 +273,8 @@ int permission(struct inode *inode, int mask, struct nameidata *nd)
if (retval)
return retval;
- return security_inode_permission(inode, mask, nd);
+ return security_inode_permission(inode,
+ mask & (MAY_READ|MAY_WRITE|MAY_EXEC));
}
/**
@@ -301,7 +289,7 @@ int permission(struct inode *inode, int mask, struct nameidata *nd)
*/
int vfs_permission(struct nameidata *nd, int mask)
{
- return permission(nd->path.dentry->d_inode, mask, nd);
+ return inode_permission(nd->path.dentry->d_inode, mask);
}
/**
@@ -318,7 +306,7 @@ int vfs_permission(struct nameidata *nd, int mask)
*/
int file_permission(struct file *file, int mask)
{
- return permission(file->f_path.dentry->d_inode, mask, NULL);
+ return inode_permission(file->f_path.dentry->d_inode, mask);
}
/*
@@ -459,8 +447,7 @@ static struct dentry * cached_lookup(struct dentry * parent, struct qstr * name,
* short-cut DAC fails, then call permission() to do more
* complete permission check.
*/
-static int exec_permission_lite(struct inode *inode,
- struct nameidata *nd)
+static int exec_permission_lite(struct inode *inode)
{
umode_t mode = inode->i_mode;
@@ -486,7 +473,7 @@ static int exec_permission_lite(struct inode *inode,
return -EACCES;
ok:
- return security_inode_permission(inode, MAY_EXEC, nd);
+ return security_inode_permission(inode, MAY_EXEC);
}
/*
@@ -519,7 +506,14 @@ static struct dentry * real_lookup(struct dentry * parent, struct qstr * name, s
*/
result = d_lookup(parent, name);
if (!result) {
- struct dentry * dentry = d_alloc(parent, name);
+ struct dentry *dentry;
+
+ /* Don't create child dentry for a dead directory. */
+ result = ERR_PTR(-ENOENT);
+ if (IS_DEADDIR(dir))
+ goto out_unlock;
+
+ dentry = d_alloc(parent, name);
result = ERR_PTR(-ENOMEM);
if (dentry) {
result = dir->i_op->lookup(dir, dentry, nd);
@@ -528,6 +522,7 @@ static struct dentry * real_lookup(struct dentry * parent, struct qstr * name, s
else
result = dentry;
}
+out_unlock:
mutex_unlock(&dir->i_mutex);
return result;
}
@@ -545,27 +540,16 @@ static struct dentry * real_lookup(struct dentry * parent, struct qstr * name, s
return result;
}
-static int __emul_lookup_dentry(const char *, struct nameidata *);
-
/* SMP-safe */
-static __always_inline int
+static __always_inline void
walk_init_root(const char *name, struct nameidata *nd)
{
struct fs_struct *fs = current->fs;
read_lock(&fs->lock);
- if (fs->altroot.dentry && !(nd->flags & LOOKUP_NOALT)) {
- nd->path = fs->altroot;
- path_get(&fs->altroot);
- read_unlock(&fs->lock);
- if (__emul_lookup_dentry(name,nd))
- return 0;
- read_lock(&fs->lock);
- }
nd->path = fs->root;
path_get(&fs->root);
read_unlock(&fs->lock);
- return 1;
}
/*
@@ -606,12 +590,9 @@ static __always_inline int __vfs_follow_link(struct nameidata *nd, const char *l
if (*link == '/') {
path_put(&nd->path);
- if (!walk_init_root(link, nd))
- /* weird __emul_prefix() stuff did it */
- goto out;
+ walk_init_root(link, nd);
}
res = link_path_walk(link, nd);
-out:
if (nd->depth || res || nd->last_type!=LAST_NORM)
return res;
/*
@@ -889,7 +870,7 @@ static int __link_path_walk(const char *name, struct nameidata *nd)
unsigned int c;
nd->flags |= LOOKUP_CONTINUE;
- err = exec_permission_lite(inode, nd);
+ err = exec_permission_lite(inode);
if (err == -EAGAIN)
err = vfs_permission(nd, MAY_EXEC);
if (err)
@@ -1060,67 +1041,6 @@ static int path_walk(const char *name, struct nameidata *nd)
return link_path_walk(name, nd);
}
-/*
- * SMP-safe: Returns 1 and nd will have valid dentry and mnt, if
- * everything is done. Returns 0 and drops input nd, if lookup failed;
- */
-static int __emul_lookup_dentry(const char *name, struct nameidata *nd)
-{
- if (path_walk(name, nd))
- return 0; /* something went wrong... */
-
- if (!nd->path.dentry->d_inode ||
- S_ISDIR(nd->path.dentry->d_inode->i_mode)) {
- struct path old_path = nd->path;
- struct qstr last = nd->last;
- int last_type = nd->last_type;
- struct fs_struct *fs = current->fs;
-
- /*
- * NAME was not found in alternate root or it's a directory.
- * Try to find it in the normal root:
- */
- nd->last_type = LAST_ROOT;
- read_lock(&fs->lock);
- nd->path = fs->root;
- path_get(&fs->root);
- read_unlock(&fs->lock);
- if (path_walk(name, nd) == 0) {
- if (nd->path.dentry->d_inode) {
- path_put(&old_path);
- return 1;
- }
- path_put(&nd->path);
- }
- nd->path = old_path;
- nd->last = last;
- nd->last_type = last_type;
- }
- return 1;
-}
-
-void set_fs_altroot(void)
-{
- char *emul = __emul_prefix();
- struct nameidata nd;
- struct path path = {}, old_path;
- int err;
- struct fs_struct *fs = current->fs;
-
- if (!emul)
- goto set_it;
- err = path_lookup(emul, LOOKUP_FOLLOW|LOOKUP_DIRECTORY|LOOKUP_NOALT, &nd);
- if (!err)
- path = nd.path;
-set_it:
- write_lock(&fs->lock);
- old_path = fs->altroot;
- fs->altroot = path;
- write_unlock(&fs->lock);
- if (old_path.dentry)
- path_put(&old_path);
-}
-
/* Returns 0 and nd will be valid on success; Retuns error, otherwise. */
static int do_path_lookup(int dfd, const char *name,
unsigned int flags, struct nameidata *nd)
@@ -1136,14 +1056,6 @@ static int do_path_lookup(int dfd, const char *name,
if (*name=='/') {
read_lock(&fs->lock);
- if (fs->altroot.dentry && !(nd->flags & LOOKUP_NOALT)) {
- nd->path = fs->altroot;
- path_get(&fs->altroot);
- read_unlock(&fs->lock);
- if (__emul_lookup_dentry(name,nd))
- goto out; /* found in altroot */
- read_lock(&fs->lock);
- }
nd->path = fs->root;
path_get(&fs->root);
read_unlock(&fs->lock);
@@ -1177,7 +1089,6 @@ static int do_path_lookup(int dfd, const char *name,
}
retval = path_walk(name, nd);
-out:
if (unlikely(!retval && !audit_dummy_context() && nd->path.dentry &&
nd->path.dentry->d_inode))
audit_inode(name, nd->path.dentry);
@@ -1282,19 +1193,6 @@ static int path_lookup_create(int dfd, const char *name,
nd, open_flags, create_mode);
}
-int __user_path_lookup_open(const char __user *name, unsigned int lookup_flags,
- struct nameidata *nd, int open_flags)
-{
- char *tmp = getname(name);
- int err = PTR_ERR(tmp);
-
- if (!IS_ERR(tmp)) {
- err = __path_lookup_intent_open(AT_FDCWD, tmp, lookup_flags, nd, open_flags, 0);
- putname(tmp);
- }
- return err;
-}
-
static struct dentry *__lookup_hash(struct qstr *name,
struct dentry *base, struct nameidata *nd)
{
@@ -1317,7 +1215,14 @@ static struct dentry *__lookup_hash(struct qstr *name,
dentry = cached_lookup(base, name, nd);
if (!dentry) {
- struct dentry *new = d_alloc(base, name);
+ struct dentry *new;
+
+ /* Don't create child dentry for a dead directory. */
+ dentry = ERR_PTR(-ENOENT);
+ if (IS_DEADDIR(inode))
+ goto out;
+
+ new = d_alloc(base, name);
dentry = ERR_PTR(-ENOMEM);
if (!new)
goto out;
@@ -1340,7 +1245,7 @@ static struct dentry *lookup_hash(struct nameidata *nd)
{
int err;
- err = permission(nd->path.dentry->d_inode, MAY_EXEC, nd);
+ err = inode_permission(nd->path.dentry->d_inode, MAY_EXEC);
if (err)
return ERR_PTR(err);
return __lookup_hash(&nd->last, nd->path.dentry, nd);
@@ -1388,7 +1293,7 @@ struct dentry *lookup_one_len(const char *name, struct dentry *base, int len)
if (err)
return ERR_PTR(err);
- err = permission(base->d_inode, MAY_EXEC, NULL);
+ err = inode_permission(base->d_inode, MAY_EXEC);
if (err)
return ERR_PTR(err);
return __lookup_hash(&this, base, NULL);
@@ -1416,22 +1321,40 @@ struct dentry *lookup_one_noperm(const char *name, struct dentry *base)
return __lookup_hash(&this, base, NULL);
}
-int __user_walk_fd(int dfd, const char __user *name, unsigned flags,
- struct nameidata *nd)
+int user_path_at(int dfd, const char __user *name, unsigned flags,
+ struct path *path)
{
+ struct nameidata nd;
char *tmp = getname(name);
int err = PTR_ERR(tmp);
-
if (!IS_ERR(tmp)) {
- err = do_path_lookup(dfd, tmp, flags, nd);
+
+ BUG_ON(flags & LOOKUP_PARENT);
+
+ err = do_path_lookup(dfd, tmp, flags, &nd);
putname(tmp);
+ if (!err)
+ *path = nd.path;
}
return err;
}
-int __user_walk(const char __user *name, unsigned flags, struct nameidata *nd)
+static int user_path_parent(int dfd, const char __user *path,
+ struct nameidata *nd, char **name)
{
- return __user_walk_fd(AT_FDCWD, name, flags, nd);
+ char *s = getname(path);
+ int error;
+
+ if (IS_ERR(s))
+ return PTR_ERR(s);
+
+ error = do_path_lookup(dfd, s, LOOKUP_PARENT, nd);
+ if (error)
+ putname(s);
+ else
+ *name = s;
+
+ return error;
}
/*
@@ -1478,7 +1401,7 @@ static int may_delete(struct inode *dir,struct dentry *victim,int isdir)
BUG_ON(victim->d_parent->d_inode != dir);
audit_inode_child(victim->d_name.name, victim, dir);
- error = permission(dir,MAY_WRITE | MAY_EXEC, NULL);
+ error = inode_permission(dir, MAY_WRITE | MAY_EXEC);
if (error)
return error;
if (IS_APPEND(dir))
@@ -1515,7 +1438,7 @@ static inline int may_create(struct inode *dir, struct dentry *child,
return -EEXIST;
if (IS_DEADDIR(dir))
return -ENOENT;
- return permission(dir,MAY_WRITE | MAY_EXEC, nd);
+ return inode_permission(dir, MAY_WRITE | MAY_EXEC);
}
/*
@@ -1755,7 +1678,7 @@ struct file *do_filp_open(int dfd, const char *pathname,
int will_write;
int flag = open_to_namei_flags(open_flag);
- acc_mode = ACC_MODE(flag);
+ acc_mode = MAY_OPEN | ACC_MODE(flag);
/* O_TRUNC implies we need access checks for write permissions */
if (flag & O_TRUNC)
@@ -2071,20 +1994,18 @@ static int may_mknod(mode_t mode)
asmlinkage long sys_mknodat(int dfd, const char __user *filename, int mode,
unsigned dev)
{
- int error = 0;
- char * tmp;
- struct dentry * dentry;
+ int error;
+ char *tmp;
+ struct dentry *dentry;
struct nameidata nd;
if (S_ISDIR(mode))
return -EPERM;
- tmp = getname(filename);
- if (IS_ERR(tmp))
- return PTR_ERR(tmp);
- error = do_path_lookup(dfd, tmp, LOOKUP_PARENT, &nd);
+ error = user_path_parent(dfd, filename, &nd, &tmp);
if (error)
- goto out;
+ return error;
+
dentry = lookup_create(&nd, 0);
if (IS_ERR(dentry)) {
error = PTR_ERR(dentry);
@@ -2116,7 +2037,6 @@ out_dput:
out_unlock:
mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
path_put(&nd.path);
-out:
putname(tmp);
return error;
@@ -2156,14 +2076,10 @@ asmlinkage long sys_mkdirat(int dfd, const char __user *pathname, int mode)
struct dentry *dentry;
struct nameidata nd;
- tmp = getname(pathname);
- error = PTR_ERR(tmp);
- if (IS_ERR(tmp))
+ error = user_path_parent(dfd, pathname, &nd, &tmp);
+ if (error)
goto out_err;
- error = do_path_lookup(dfd, tmp, LOOKUP_PARENT, &nd);
- if (error)
- goto out;
dentry = lookup_create(&nd, 1);
error = PTR_ERR(dentry);
if (IS_ERR(dentry))
@@ -2181,7 +2097,6 @@ out_dput:
out_unlock:
mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
path_put(&nd.path);
-out:
putname(tmp);
out_err:
return error;
@@ -2259,13 +2174,9 @@ static long do_rmdir(int dfd, const char __user *pathname)
struct dentry *dentry;
struct nameidata nd;
- name = getname(pathname);
- if(IS_ERR(name))
- return PTR_ERR(name);
-
- error = do_path_lookup(dfd, name, LOOKUP_PARENT, &nd);
+ error = user_path_parent(dfd, pathname, &nd, &name);
if (error)
- goto exit;
+ return error;
switch(nd.last_type) {
case LAST_DOTDOT:
@@ -2294,7 +2205,6 @@ exit2:
mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
exit1:
path_put(&nd.path);
-exit:
putname(name);
return error;
}
@@ -2343,19 +2253,16 @@ int vfs_unlink(struct inode *dir, struct dentry *dentry)
*/
static long do_unlinkat(int dfd, const char __user *pathname)
{
- int error = 0;
- char * name;
+ int error;
+ char *name;
struct dentry *dentry;
struct nameidata nd;
struct inode *inode = NULL;
- name = getname(pathname);
- if(IS_ERR(name))
- return PTR_ERR(name);
-
- error = do_path_lookup(dfd, name, LOOKUP_PARENT, &nd);
+ error = user_path_parent(dfd, pathname, &nd, &name);
if (error)
- goto exit;
+ return error;
+
error = -EISDIR;
if (nd.last_type != LAST_NORM)
goto exit1;
@@ -2382,7 +2289,6 @@ static long do_unlinkat(int dfd, const char __user *pathname)
iput(inode); /* truncate the inode here */
exit1:
path_put(&nd.path);
-exit:
putname(name);
return error;
@@ -2408,7 +2314,7 @@ asmlinkage long sys_unlink(const char __user *pathname)
return do_unlinkat(AT_FDCWD, pathname);
}
-int vfs_symlink(struct inode *dir, struct dentry *dentry, const char *oldname, int mode)
+int vfs_symlink(struct inode *dir, struct dentry *dentry, const char *oldname)
{
int error = may_create(dir, dentry, NULL);
@@ -2432,23 +2338,20 @@ int vfs_symlink(struct inode *dir, struct dentry *dentry, const char *oldname, i
asmlinkage long sys_symlinkat(const char __user *oldname,
int newdfd, const char __user *newname)
{
- int error = 0;
- char * from;
- char * to;
+ int error;
+ char *from;
+ char *to;
struct dentry *dentry;
struct nameidata nd;
from = getname(oldname);
- if(IS_ERR(from))
+ if (IS_ERR(from))
return PTR_ERR(from);
- to = getname(newname);
- error = PTR_ERR(to);
- if (IS_ERR(to))
- goto out_putname;
- error = do_path_lookup(newdfd, to, LOOKUP_PARENT, &nd);
+ error = user_path_parent(newdfd, newname, &nd, &to);
if (error)
- goto out;
+ goto out_putname;
+
dentry = lookup_create(&nd, 0);
error = PTR_ERR(dentry);
if (IS_ERR(dentry))
@@ -2457,14 +2360,13 @@ asmlinkage long sys_symlinkat(const char __user *oldname,
error = mnt_want_write(nd.path.mnt);
if (error)
goto out_dput;
- error = vfs_symlink(nd.path.dentry->d_inode, dentry, from, S_IALLUGO);
+ error = vfs_symlink(nd.path.dentry->d_inode, dentry, from);
mnt_drop_write(nd.path.mnt);
out_dput:
dput(dentry);
out_unlock:
mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
path_put(&nd.path);
-out:
putname(to);
out_putname:
putname(from);
@@ -2498,19 +2400,19 @@ int vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_de
return -EPERM;
if (!dir->i_op || !dir->i_op->link)
return -EPERM;
- if (S_ISDIR(old_dentry->d_inode->i_mode))
+ if (S_ISDIR(inode->i_mode))
return -EPERM;
error = security_inode_link(old_dentry, dir, new_dentry);
if (error)
return error;
- mutex_lock(&old_dentry->d_inode->i_mutex);
+ mutex_lock(&inode->i_mutex);
DQUOT_INIT(dir);
error = dir->i_op->link(old_dentry, dir, new_dentry);
- mutex_unlock(&old_dentry->d_inode->i_mutex);
+ mutex_unlock(&inode->i_mutex);
if (!error)
- fsnotify_link(dir, old_dentry->d_inode, new_dentry);
+ fsnotify_link(dir, inode, new_dentry);
return error;
}
@@ -2528,27 +2430,25 @@ asmlinkage long sys_linkat(int olddfd, const char __user *oldname,
int flags)
{
struct dentry *new_dentry;
- struct nameidata nd, old_nd;
+ struct nameidata nd;
+ struct path old_path;
int error;
- char * to;
+ char *to;
if ((flags & ~AT_SYMLINK_FOLLOW) != 0)
return -EINVAL;
- to = getname(newname);
- if (IS_ERR(to))
- return PTR_ERR(to);
-
- error = __user_walk_fd(olddfd, oldname,
- flags & AT_SYMLINK_FOLLOW ? LOOKUP_FOLLOW : 0,
- &old_nd);
+ error = user_path_at(olddfd, oldname,
+ flags & AT_SYMLINK_FOLLOW ? LOOKUP_FOLLOW : 0,
+ &old_path);
if (error)
- goto exit;
- error = do_path_lookup(newdfd, to, LOOKUP_PARENT, &nd);
+ return error;
+
+ error = user_path_parent(newdfd, newname, &nd, &to);
if (error)
goto out;
error = -EXDEV;
- if (old_nd.path.mnt != nd.path.mnt)
+ if (old_path.mnt != nd.path.mnt)
goto out_release;
new_dentry = lookup_create(&nd, 0);
error = PTR_ERR(new_dentry);
@@ -2557,7 +2457,7 @@ asmlinkage long sys_linkat(int olddfd, const char __user *oldname,
error = mnt_want_write(nd.path.mnt);
if (error)
goto out_dput;
- error = vfs_link(old_nd.path.dentry, nd.path.dentry->d_inode, new_dentry);
+ error = vfs_link(old_path.dentry, nd.path.dentry->d_inode, new_dentry);
mnt_drop_write(nd.path.mnt);
out_dput:
dput(new_dentry);
@@ -2565,10 +2465,9 @@ out_unlock:
mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
out_release:
path_put(&nd.path);
-out:
- path_put(&old_nd.path);
-exit:
putname(to);
+out:
+ path_put(&old_path);
return error;
}
@@ -2621,7 +2520,7 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
* we'll need to flip '..'.
*/
if (new_dir != old_dir) {
- error = permission(old_dentry->d_inode, MAY_WRITE, NULL);
+ error = inode_permission(old_dentry->d_inode, MAY_WRITE);
if (error)
return error;
}
@@ -2724,20 +2623,22 @@ int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
return error;
}
-static int do_rename(int olddfd, const char *oldname,
- int newdfd, const char *newname)
+asmlinkage long sys_renameat(int olddfd, const char __user *oldname,
+ int newdfd, const char __user *newname)
{
- int error = 0;
- struct dentry * old_dir, * new_dir;
- struct dentry * old_dentry, *new_dentry;
- struct dentry * trap;
+ struct dentry *old_dir, *new_dir;
+ struct dentry *old_dentry, *new_dentry;
+ struct dentry *trap;
struct nameidata oldnd, newnd;
+ char *from;
+ char *to;
+ int error;
- error = do_path_lookup(olddfd, oldname, LOOKUP_PARENT, &oldnd);
+ error = user_path_parent(olddfd, oldname, &oldnd, &from);
if (error)
goto exit;
- error = do_path_lookup(newdfd, newname, LOOKUP_PARENT, &newnd);
+ error = user_path_parent(newdfd, newname, &newnd, &to);
if (error)
goto exit1;
@@ -2799,29 +2700,11 @@ exit3:
unlock_rename(new_dir, old_dir);
exit2:
path_put(&newnd.path);
+ putname(to);
exit1:
path_put(&oldnd.path);
-exit:
- return error;
-}
-
-asmlinkage long sys_renameat(int olddfd, const char __user *oldname,
- int newdfd, const char __user *newname)
-{
- int error;
- char * from;
- char * to;
-
- from = getname(oldname);
- if(IS_ERR(from))
- return PTR_ERR(from);
- to = getname(newname);
- error = PTR_ERR(to);
- if (!IS_ERR(to)) {
- error = do_rename(olddfd, from, newdfd, to);
- putname(to);
- }
putname(from);
+exit:
return error;
}
@@ -2959,8 +2842,7 @@ const struct inode_operations page_symlink_inode_operations = {
.put_link = page_put_link,
};
-EXPORT_SYMBOL(__user_walk);
-EXPORT_SYMBOL(__user_walk_fd);
+EXPORT_SYMBOL(user_path_at);
EXPORT_SYMBOL(follow_down);
EXPORT_SYMBOL(follow_up);
EXPORT_SYMBOL(get_write_access); /* binfmt_aout */
@@ -2975,7 +2857,7 @@ EXPORT_SYMBOL(page_symlink);
EXPORT_SYMBOL(page_symlink_inode_operations);
EXPORT_SYMBOL(path_lookup);
EXPORT_SYMBOL(vfs_path_lookup);
-EXPORT_SYMBOL(permission);
+EXPORT_SYMBOL(inode_permission);
EXPORT_SYMBOL(vfs_permission);
EXPORT_SYMBOL(file_permission);
EXPORT_SYMBOL(unlock_rename);
diff --git a/fs/namespace.c b/fs/namespace.c
index f30b11e2240e..411728c0c8bb 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -112,9 +112,13 @@ struct vfsmount *alloc_vfsmnt(const char *name)
int err;
err = mnt_alloc_id(mnt);
- if (err) {
- kmem_cache_free(mnt_cache, mnt);
- return NULL;
+ if (err)
+ goto out_free_cache;
+
+ if (name) {
+ mnt->mnt_devname = kstrdup(name, GFP_KERNEL);
+ if (!mnt->mnt_devname)
+ goto out_free_id;
}
atomic_set(&mnt->mnt_count, 1);
@@ -127,16 +131,14 @@ struct vfsmount *alloc_vfsmnt(const char *name)
INIT_LIST_HEAD(&mnt->mnt_slave_list);
INIT_LIST_HEAD(&mnt->mnt_slave);
atomic_set(&mnt->__mnt_writers, 0);
- if (name) {
- int size = strlen(name) + 1;
- char *newname = kmalloc(size, GFP_KERNEL);
- if (newname) {
- memcpy(newname, name, size);
- mnt->mnt_devname = newname;
- }
- }
}
return mnt;
+
+out_free_id:
+ mnt_free_id(mnt);
+out_free_cache:
+ kmem_cache_free(mnt_cache, mnt);
+ return NULL;
}
/*
@@ -1128,27 +1130,27 @@ static int do_umount(struct vfsmount *mnt, int flags)
asmlinkage long sys_umount(char __user * name, int flags)
{
- struct nameidata nd;
+ struct path path;
int retval;
- retval = __user_walk(name, LOOKUP_FOLLOW, &nd);
+ retval = user_path(name, &path);
if (retval)
goto out;
retval = -EINVAL;
- if (nd.path.dentry != nd.path.mnt->mnt_root)
+ if (path.dentry != path.mnt->mnt_root)
goto dput_and_out;
- if (!check_mnt(nd.path.mnt))
+ if (!check_mnt(path.mnt))
goto dput_and_out;
retval = -EPERM;
if (!capable(CAP_SYS_ADMIN))
goto dput_and_out;
- retval = do_umount(nd.path.mnt, flags);
+ retval = do_umount(path.mnt, flags);
dput_and_out:
/* we mustn't call path_put() as that would clear mnt_expiry_mark */
- dput(nd.path.dentry);
- mntput_no_expire(nd.path.mnt);
+ dput(path.dentry);
+ mntput_no_expire(path.mnt);
out:
return retval;
}
@@ -1972,7 +1974,7 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
struct fs_struct *fs)
{
struct mnt_namespace *new_ns;
- struct vfsmount *rootmnt = NULL, *pwdmnt = NULL, *altrootmnt = NULL;
+ struct vfsmount *rootmnt = NULL, *pwdmnt = NULL;
struct vfsmount *p, *q;
new_ns = kmalloc(sizeof(struct mnt_namespace), GFP_KERNEL);
@@ -2015,10 +2017,6 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
pwdmnt = p;
fs->pwd.mnt = mntget(q);
}
- if (p == fs->altroot.mnt) {
- altrootmnt = p;
- fs->altroot.mnt = mntget(q);
- }
}
p = next_mnt(p, mnt_ns->root);
q = next_mnt(q, new_ns->root);
@@ -2029,8 +2027,6 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
mntput(rootmnt);
if (pwdmnt)
mntput(pwdmnt);
- if (altrootmnt)
- mntput(altrootmnt);
return new_ns;
}
@@ -2183,28 +2179,26 @@ asmlinkage long sys_pivot_root(const char __user * new_root,
const char __user * put_old)
{
struct vfsmount *tmp;
- struct nameidata new_nd, old_nd;
- struct path parent_path, root_parent, root;
+ struct path new, old, parent_path, root_parent, root;
int error;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- error = __user_walk(new_root, LOOKUP_FOLLOW | LOOKUP_DIRECTORY,
- &new_nd);
+ error = user_path_dir(new_root, &new);
if (error)
goto out0;
error = -EINVAL;
- if (!check_mnt(new_nd.path.mnt))
+ if (!check_mnt(new.mnt))
goto out1;
- error = __user_walk(put_old, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &old_nd);
+ error = user_path_dir(put_old, &old);
if (error)
goto out1;
- error = security_sb_pivotroot(&old_nd.path, &new_nd.path);
+ error = security_sb_pivotroot(&old, &new);
if (error) {
- path_put(&old_nd.path);
+ path_put(&old);
goto out1;
}
@@ -2213,69 +2207,69 @@ asmlinkage long sys_pivot_root(const char __user * new_root,
path_get(&current->fs->root);
read_unlock(&current->fs->lock);
down_write(&namespace_sem);
- mutex_lock(&old_nd.path.dentry->d_inode->i_mutex);
+ mutex_lock(&old.dentry->d_inode->i_mutex);
error = -EINVAL;
- if (IS_MNT_SHARED(old_nd.path.mnt) ||
- IS_MNT_SHARED(new_nd.path.mnt->mnt_parent) ||
+ if (IS_MNT_SHARED(old.mnt) ||
+ IS_MNT_SHARED(new.mnt->mnt_parent) ||
IS_MNT_SHARED(root.mnt->mnt_parent))
goto out2;
if (!check_mnt(root.mnt))
goto out2;
error = -ENOENT;
- if (IS_DEADDIR(new_nd.path.dentry->d_inode))
+ if (IS_DEADDIR(new.dentry->d_inode))
goto out2;
- if (d_unhashed(new_nd.path.dentry) && !IS_ROOT(new_nd.path.dentry))
+ if (d_unhashed(new.dentry) && !IS_ROOT(new.dentry))
goto out2;
- if (d_unhashed(old_nd.path.dentry) && !IS_ROOT(old_nd.path.dentry))
+ if (d_unhashed(old.dentry) && !IS_ROOT(old.dentry))
goto out2;
error = -EBUSY;
- if (new_nd.path.mnt == root.mnt ||
- old_nd.path.mnt == root.mnt)
+ if (new.mnt == root.mnt ||
+ old.mnt == root.mnt)
goto out2; /* loop, on the same file system */
error = -EINVAL;
if (root.mnt->mnt_root != root.dentry)
goto out2; /* not a mountpoint */
if (root.mnt->mnt_parent == root.mnt)
goto out2; /* not attached */
- if (new_nd.path.mnt->mnt_root != new_nd.path.dentry)
+ if (new.mnt->mnt_root != new.dentry)
goto out2; /* not a mountpoint */
- if (new_nd.path.mnt->mnt_parent == new_nd.path.mnt)
+ if (new.mnt->mnt_parent == new.mnt)
goto out2; /* not attached */
/* make sure we can reach put_old from new_root */
- tmp = old_nd.path.mnt;
+ tmp = old.mnt;
spin_lock(&vfsmount_lock);
- if (tmp != new_nd.path.mnt) {
+ if (tmp != new.mnt) {
for (;;) {
if (tmp->mnt_parent == tmp)
goto out3; /* already mounted on put_old */
- if (tmp->mnt_parent == new_nd.path.mnt)
+ if (tmp->mnt_parent == new.mnt)
break;
tmp = tmp->mnt_parent;
}
- if (!is_subdir(tmp->mnt_mountpoint, new_nd.path.dentry))
+ if (!is_subdir(tmp->mnt_mountpoint, new.dentry))
goto out3;
- } else if (!is_subdir(old_nd.path.dentry, new_nd.path.dentry))
+ } else if (!is_subdir(old.dentry, new.dentry))
goto out3;
- detach_mnt(new_nd.path.mnt, &parent_path);
+ detach_mnt(new.mnt, &parent_path);
detach_mnt(root.mnt, &root_parent);
/* mount old root on put_old */
- attach_mnt(root.mnt, &old_nd.path);
+ attach_mnt(root.mnt, &old);
/* mount new_root on / */
- attach_mnt(new_nd.path.mnt, &root_parent);
+ attach_mnt(new.mnt, &root_parent);
touch_mnt_namespace(current->nsproxy->mnt_ns);
spin_unlock(&vfsmount_lock);
- chroot_fs_refs(&root, &new_nd.path);
- security_sb_post_pivotroot(&root, &new_nd.path);
+ chroot_fs_refs(&root, &new);
+ security_sb_post_pivotroot(&root, &new);
error = 0;
path_put(&root_parent);
path_put(&parent_path);
out2:
- mutex_unlock(&old_nd.path.dentry->d_inode->i_mutex);
+ mutex_unlock(&old.dentry->d_inode->i_mutex);
up_write(&namespace_sem);
path_put(&root);
- path_put(&old_nd.path);
+ path_put(&old);
out1:
- path_put(&new_nd.path);
+ path_put(&new);
out0:
return error;
out3:
diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c
index 011ef0b6d2d4..07e9715b8658 100644
--- a/fs/ncpfs/dir.c
+++ b/fs/ncpfs/dir.c
@@ -266,7 +266,7 @@ leave_me:;
static int
-__ncp_lookup_validate(struct dentry * dentry, struct nameidata *nd)
+__ncp_lookup_validate(struct dentry *dentry)
{
struct ncp_server *server;
struct dentry *parent;
@@ -340,7 +340,7 @@ ncp_lookup_validate(struct dentry * dentry, struct nameidata *nd)
{
int res;
lock_kernel();
- res = __ncp_lookup_validate(dentry, nd);
+ res = __ncp_lookup_validate(dentry);
unlock_kernel();
return res;
}
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 28a238dab23a..74f92b717f78 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1884,7 +1884,7 @@ static int nfs_do_access(struct inode *inode, struct rpc_cred *cred, int mask)
return status;
nfs_access_add_cache(inode, &cache);
out:
- if ((cache.mask & mask) == mask)
+ if ((mask & ~cache.mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) == 0)
return 0;
return -EACCES;
}
@@ -1907,17 +1907,17 @@ int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags)
return nfs_do_access(inode, cred, nfs_open_permission_mask(openflags));
}
-int nfs_permission(struct inode *inode, int mask, struct nameidata *nd)
+int nfs_permission(struct inode *inode, int mask)
{
struct rpc_cred *cred;
int res = 0;
nfs_inc_stats(inode, NFSIOS_VFSACCESS);
- if (mask == 0)
+ if ((mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) == 0)
goto out;
/* Is this sys_access() ? */
- if (nd != NULL && (nd->flags & LOOKUP_ACCESS))
+ if (mask & MAY_ACCESS)
goto force_lookup;
switch (inode->i_mode & S_IFMT) {
@@ -1926,8 +1926,7 @@ int nfs_permission(struct inode *inode, int mask, struct nameidata *nd)
case S_IFREG:
/* NFSv4 has atomic_open... */
if (nfs_server_capable(inode, NFS_CAP_ATOMIC_OPEN)
- && nd != NULL
- && (nd->flags & LOOKUP_OPEN))
+ && (mask & MAY_OPEN))
goto out;
break;
case S_IFDIR:
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 1955a2702e60..c53e65f8f3a2 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -12,6 +12,7 @@
#include <linux/time.h>
#include <linux/errno.h>
#include <linux/fs.h>
+#include <linux/namei.h>
#include <linux/fcntl.h>
#include <linux/net.h>
#include <linux/in.h>
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index f45451eb1e38..ea37c96f0445 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -51,7 +51,7 @@ static int nfsd_acceptable(void *expv, struct dentry *dentry)
/* make sure parents give x permission to user */
int err;
parent = dget_parent(tdentry);
- err = permission(parent->d_inode, MAY_EXEC, NULL);
+ err = inode_permission(parent->d_inode, MAY_EXEC);
if (err < 0) {
dput(parent);
break;
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 0f4481e0502d..18060bed5267 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1516,7 +1516,6 @@ nfsd_symlink(struct svc_rqst *rqstp, struct svc_fh *fhp,
struct dentry *dentry, *dnew;
__be32 err, cerr;
int host_err;
- umode_t mode;
err = nfserr_noent;
if (!flen || !plen)
@@ -1535,11 +1534,6 @@ nfsd_symlink(struct svc_rqst *rqstp, struct svc_fh *fhp,
if (IS_ERR(dnew))
goto out_nfserr;
- mode = S_IALLUGO;
- /* Only the MODE ATTRibute is even vaguely meaningful */
- if (iap && (iap->ia_valid & ATTR_MODE))
- mode = iap->ia_mode & S_IALLUGO;
-
host_err = mnt_want_write(fhp->fh_export->ex_path.mnt);
if (host_err)
goto out_nfserr;
@@ -1551,11 +1545,11 @@ nfsd_symlink(struct svc_rqst *rqstp, struct svc_fh *fhp,
else {
strncpy(path_alloced, path, plen);
path_alloced[plen] = 0;
- host_err = vfs_symlink(dentry->d_inode, dnew, path_alloced, mode);
+ host_err = vfs_symlink(dentry->d_inode, dnew, path_alloced);
kfree(path_alloced);
}
} else
- host_err = vfs_symlink(dentry->d_inode, dnew, path, mode);
+ host_err = vfs_symlink(dentry->d_inode, dnew, path);
if (!host_err) {
if (EX_ISSYNC(fhp->fh_export))
@@ -1959,12 +1953,12 @@ nfsd_permission(struct svc_rqst *rqstp, struct svc_export *exp,
return 0;
/* This assumes NFSD_MAY_{READ,WRITE,EXEC} == MAY_{READ,WRITE,EXEC} */
- err = permission(inode, acc & (MAY_READ|MAY_WRITE|MAY_EXEC), NULL);
+ err = inode_permission(inode, acc & (MAY_READ|MAY_WRITE|MAY_EXEC));
/* Allow read access to binaries even when mode 111 */
if (err == -EACCES && S_ISREG(inode->i_mode) &&
acc == (NFSD_MAY_READ | NFSD_MAY_OWNER_OVERRIDE))
- err = permission(inode, MAY_EXEC, NULL);
+ err = inode_permission(inode, MAY_EXEC);
return err? nfserrno(err) : 0;
}
diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index 3c5550cd11d6..d020866d4232 100644
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -2118,7 +2118,7 @@ static ssize_t ntfs_file_aio_write_nolock(struct kiocb *iocb,
goto out;
if (!count)
goto out;
- err = remove_suid(file->f_path.dentry);
+ err = file_remove_suid(file);
if (err)
goto out;
file_update_time(file);
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index e8514e8b6ce8..be2dd95d3a1d 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1176,7 +1176,7 @@ bail:
return err;
}
-int ocfs2_permission(struct inode *inode, int mask, struct nameidata *nd)
+int ocfs2_permission(struct inode *inode, int mask)
{
int ret;
diff --git a/fs/ocfs2/file.h b/fs/ocfs2/file.h
index 048ddcaf5c80..1e27b4d017ea 100644
--- a/fs/ocfs2/file.h
+++ b/fs/ocfs2/file.h
@@ -62,8 +62,7 @@ int ocfs2_lock_allocators(struct inode *inode, struct ocfs2_dinode *di,
int ocfs2_setattr(struct dentry *dentry, struct iattr *attr);
int ocfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat);
-int ocfs2_permission(struct inode *inode, int mask,
- struct nameidata *nd);
+int ocfs2_permission(struct inode *inode, int mask);
int ocfs2_should_update_atime(struct inode *inode,
struct vfsmount *vfsmnt);
diff --git a/fs/open.c b/fs/open.c
index bb98d2fe809f..52647be277a2 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -122,37 +122,37 @@ static int vfs_statfs64(struct dentry *dentry, struct statfs64 *buf)
return 0;
}
-asmlinkage long sys_statfs(const char __user * path, struct statfs __user * buf)
+asmlinkage long sys_statfs(const char __user *pathname, struct statfs __user * buf)
{
- struct nameidata nd;
+ struct path path;
int error;
- error = user_path_walk(path, &nd);
+ error = user_path(pathname, &path);
if (!error) {
struct statfs tmp;
- error = vfs_statfs_native(nd.path.dentry, &tmp);
+ error = vfs_statfs_native(path.dentry, &tmp);
if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
error = -EFAULT;
- path_put(&nd.path);
+ path_put(&path);
}
return error;
}
-asmlinkage long sys_statfs64(const char __user *path, size_t sz, struct statfs64 __user *buf)
+asmlinkage long sys_statfs64(const char __user *pathname, size_t sz, struct statfs64 __user *buf)
{
- struct nameidata nd;
+ struct path path;
long error;
if (sz != sizeof(*buf))
return -EINVAL;
- error = user_path_walk(path, &nd);
+ error = user_path(pathname, &path);
if (!error) {
struct statfs64 tmp;
- error = vfs_statfs64(nd.path.dentry, &tmp);
+ error = vfs_statfs64(path.dentry, &tmp);
if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
error = -EFAULT;
- path_put(&nd.path);
+ path_put(&path);
}
return error;
}
@@ -223,20 +223,20 @@ int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs,
return err;
}
-static long do_sys_truncate(const char __user * path, loff_t length)
+static long do_sys_truncate(const char __user *pathname, loff_t length)
{
- struct nameidata nd;
- struct inode * inode;
+ struct path path;
+ struct inode *inode;
int error;
error = -EINVAL;
if (length < 0) /* sorry, but loff_t says... */
goto out;
- error = user_path_walk(path, &nd);
+ error = user_path(pathname, &path);
if (error)
goto out;
- inode = nd.path.dentry->d_inode;
+ inode = path.dentry->d_inode;
/* For directories it's -EISDIR, for other non-regulars - -EINVAL */
error = -EISDIR;
@@ -247,16 +247,16 @@ static long do_sys_truncate(const char __user * path, loff_t length)
if (!S_ISREG(inode->i_mode))
goto dput_and_out;
- error = mnt_want_write(nd.path.mnt);
+ error = mnt_want_write(path.mnt);
if (error)
goto dput_and_out;
- error = vfs_permission(&nd, MAY_WRITE);
+ error = inode_permission(inode, MAY_WRITE);
if (error)
goto mnt_drop_write_and_out;
error = -EPERM;
- if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+ if (IS_APPEND(inode))
goto mnt_drop_write_and_out;
error = get_write_access(inode);
@@ -274,15 +274,15 @@ static long do_sys_truncate(const char __user * path, loff_t length)
error = locks_verify_truncate(inode, NULL, length);
if (!error) {
DQUOT_INIT(inode);
- error = do_truncate(nd.path.dentry, length, 0, NULL);
+ error = do_truncate(path.dentry, length, 0, NULL);
}
put_write_and_out:
put_write_access(inode);
mnt_drop_write_and_out:
- mnt_drop_write(nd.path.mnt);
+ mnt_drop_write(path.mnt);
dput_and_out:
- path_put(&nd.path);
+ path_put(&path);
out:
return error;
}
@@ -425,7 +425,8 @@ out:
*/
asmlinkage long sys_faccessat(int dfd, const char __user *filename, int mode)
{
- struct nameidata nd;
+ struct path path;
+ struct inode *inode;
int old_fsuid, old_fsgid;
kernel_cap_t uninitialized_var(old_cap); /* !SECURE_NO_SETUID_FIXUP */
int res;
@@ -448,7 +449,7 @@ asmlinkage long sys_faccessat(int dfd, const char __user *filename, int mode)
* FIXME: There is a race here against sys_capset. The
* capabilities can change yet we will restore the old
* value below. We should hold task_capabilities_lock,
- * but we cannot because user_path_walk can sleep.
+ * but we cannot because user_path_at can sleep.
*/
#endif /* ndef CONFIG_SECURITY_FILE_CAPABILITIES */
if (current->uid)
@@ -457,14 +458,25 @@ asmlinkage long sys_faccessat(int dfd, const char __user *filename, int mode)
old_cap = cap_set_effective(current->cap_permitted);
}
- res = __user_walk_fd(dfd, filename, LOOKUP_FOLLOW|LOOKUP_ACCESS, &nd);
+ res = user_path_at(dfd, filename, LOOKUP_FOLLOW, &path);
if (res)
goto out;
- res = vfs_permission(&nd, mode);
+ inode = path.dentry->d_inode;
+
+ if ((mode & MAY_EXEC) && S_ISREG(inode->i_mode)) {
+ /*
+ * MAY_EXEC on regular files is denied if the fs is mounted
+ * with the "noexec" flag.
+ */
+ res = -EACCES;
+ if (path.mnt->mnt_flags & MNT_NOEXEC)
+ goto out_path_release;
+ }
+
+ res = inode_permission(inode, mode | MAY_ACCESS);
/* SuS v2 requires we report a read only fs too */
- if(res || !(mode & S_IWOTH) ||
- special_file(nd.path.dentry->d_inode->i_mode))
+ if (res || !(mode & S_IWOTH) || special_file(inode->i_mode))
goto out_path_release;
/*
* This is a rare case where using __mnt_is_readonly()
@@ -476,11 +488,11 @@ asmlinkage long sys_faccessat(int dfd, const char __user *filename, int mode)
* inherently racy and know that the fs may change
* state before we even see this result.
*/
- if (__mnt_is_readonly(nd.path.mnt))
+ if (__mnt_is_readonly(path.mnt))
res = -EROFS;
out_path_release:
- path_put(&nd.path);
+ path_put(&path);
out:
current->fsuid = old_fsuid;
current->fsgid = old_fsgid;
@@ -498,22 +510,21 @@ asmlinkage long sys_access(const char __user *filename, int mode)
asmlinkage long sys_chdir(const char __user * filename)
{
- struct nameidata nd;
+ struct path path;
int error;
- error = __user_walk(filename,
- LOOKUP_FOLLOW|LOOKUP_DIRECTORY|LOOKUP_CHDIR, &nd);
+ error = user_path_dir(filename, &path);
if (error)
goto out;
- error = vfs_permission(&nd, MAY_EXEC);
+ error = inode_permission(path.dentry->d_inode, MAY_EXEC | MAY_ACCESS);
if (error)
goto dput_and_out;
- set_fs_pwd(current->fs, &nd.path);
+ set_fs_pwd(current->fs, &path);
dput_and_out:
- path_put(&nd.path);
+ path_put(&path);
out:
return error;
}
@@ -535,7 +546,7 @@ asmlinkage long sys_fchdir(unsigned int fd)
if (!S_ISDIR(inode->i_mode))
goto out_putf;
- error = file_permission(file, MAY_EXEC);
+ error = inode_permission(inode, MAY_EXEC | MAY_ACCESS);
if (!error)
set_fs_pwd(current->fs, &file->f_path);
out_putf:
@@ -546,14 +557,14 @@ out:
asmlinkage long sys_chroot(const char __user * filename)
{
- struct nameidata nd;
+ struct path path;
int error;
- error = __user_walk(filename, LOOKUP_FOLLOW | LOOKUP_DIRECTORY | LOOKUP_NOALT, &nd);
+ error = user_path_dir(filename, &path);
if (error)
goto out;
- error = vfs_permission(&nd, MAY_EXEC);
+ error = inode_permission(path.dentry->d_inode, MAY_EXEC | MAY_ACCESS);
if (error)
goto dput_and_out;
@@ -561,11 +572,10 @@ asmlinkage long sys_chroot(const char __user * filename)
if (!capable(CAP_SYS_CHROOT))
goto dput_and_out;
- set_fs_root(current->fs, &nd.path);
- set_fs_altroot();
+ set_fs_root(current->fs, &path);
error = 0;
dput_and_out:
- path_put(&nd.path);
+ path_put(&path);
out:
return error;
}
@@ -590,9 +600,6 @@ asmlinkage long sys_fchmod(unsigned int fd, mode_t mode)
err = mnt_want_write(file->f_path.mnt);
if (err)
goto out_putf;
- err = -EPERM;
- if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
- goto out_drop_write;
mutex_lock(&inode->i_mutex);
if (mode == (mode_t) -1)
mode = inode->i_mode;
@@ -600,8 +607,6 @@ asmlinkage long sys_fchmod(unsigned int fd, mode_t mode)
newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
err = notify_change(dentry, &newattrs);
mutex_unlock(&inode->i_mutex);
-
-out_drop_write:
mnt_drop_write(file->f_path.mnt);
out_putf:
fput(file);
@@ -612,36 +617,29 @@ out:
asmlinkage long sys_fchmodat(int dfd, const char __user *filename,
mode_t mode)
{
- struct nameidata nd;
- struct inode * inode;
+ struct path path;
+ struct inode *inode;
int error;
struct iattr newattrs;
- error = __user_walk_fd(dfd, filename, LOOKUP_FOLLOW, &nd);
+ error = user_path_at(dfd, filename, LOOKUP_FOLLOW, &path);
if (error)
goto out;
- inode = nd.path.dentry->d_inode;
+ inode = path.dentry->d_inode;
- error = mnt_want_write(nd.path.mnt);
+ error = mnt_want_write(path.mnt);
if (error)
goto dput_and_out;
-
- error = -EPERM;
- if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
- goto out_drop_write;
-
mutex_lock(&inode->i_mutex);
if (mode == (mode_t) -1)
mode = inode->i_mode;
newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
- error = notify_change(nd.path.dentry, &newattrs);
+ error = notify_change(path.dentry, &newattrs);
mutex_unlock(&inode->i_mutex);
-
-out_drop_write:
- mnt_drop_write(nd.path.mnt);
+ mnt_drop_write(path.mnt);
dput_and_out:
- path_put(&nd.path);
+ path_put(&path);
out:
return error;
}
@@ -653,18 +651,10 @@ asmlinkage long sys_chmod(const char __user *filename, mode_t mode)
static int chown_common(struct dentry * dentry, uid_t user, gid_t group)
{
- struct inode * inode;
+ struct inode *inode = dentry->d_inode;
int error;
struct iattr newattrs;
- error = -ENOENT;
- if (!(inode = dentry->d_inode)) {
- printk(KERN_ERR "chown_common: NULL inode\n");
- goto out;
- }
- error = -EPERM;
- if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
- goto out;
newattrs.ia_valid = ATTR_CTIME;
if (user != (uid_t) -1) {
newattrs.ia_valid |= ATTR_UID;
@@ -680,25 +670,25 @@ static int chown_common(struct dentry * dentry, uid_t user, gid_t group)
mutex_lock(&inode->i_mutex);
error = notify_change(dentry, &newattrs);
mutex_unlock(&inode->i_mutex);
-out:
+
return error;
}
asmlinkage long sys_chown(const char __user * filename, uid_t user, gid_t group)
{
- struct nameidata nd;
+ struct path path;
int error;
- error = user_path_walk(filename, &nd);
+ error = user_path(filename, &path);
if (error)
goto out;
- error = mnt_want_write(nd.path.mnt);
+ error = mnt_want_write(path.mnt);
if (error)
goto out_release;
- error = chown_common(nd.path.dentry, user, group);
- mnt_drop_write(nd.path.mnt);
+ error = chown_common(path.dentry, user, group);
+ mnt_drop_write(path.mnt);
out_release:
- path_put(&nd.path);
+ path_put(&path);
out:
return error;
}
@@ -706,7 +696,7 @@ out:
asmlinkage long sys_fchownat(int dfd, const char __user *filename, uid_t user,
gid_t group, int flag)
{
- struct nameidata nd;
+ struct path path;
int error = -EINVAL;
int follow;
@@ -714,35 +704,35 @@ asmlinkage long sys_fchownat(int dfd, const char __user *filename, uid_t user,
goto out;
follow = (flag & AT_SYMLINK_NOFOLLOW) ? 0 : LOOKUP_FOLLOW;
- error = __user_walk_fd(dfd, filename, follow, &nd);
+ error = user_path_at(dfd, filename, follow, &path);
if (error)
goto out;
- error = mnt_want_write(nd.path.mnt);
+ error = mnt_want_write(path.mnt);
if (error)
goto out_release;
- error = chown_common(nd.path.dentry, user, group);
- mnt_drop_write(nd.path.mnt);
+ error = chown_common(path.dentry, user, group);
+ mnt_drop_write(path.mnt);
out_release:
- path_put(&nd.path);
+ path_put(&path);
out:
return error;
}
asmlinkage long sys_lchown(const char __user * filename, uid_t user, gid_t group)
{
- struct nameidata nd;
+ struct path path;
int error;
- error = user_path_walk_link(filename, &nd);
+ error = user_lpath(filename, &path);
if (error)
goto out;
- error = mnt_want_write(nd.path.mnt);
+ error = mnt_want_write(path.mnt);
if (error)
goto out_release;
- error = chown_common(nd.path.dentry, user, group);
- mnt_drop_write(nd.path.mnt);
+ error = chown_common(path.dentry, user, group);
+ mnt_drop_write(path.mnt);
out_release:
- path_put(&nd.path);
+ path_put(&path);
out:
return error;
}
@@ -982,7 +972,6 @@ int get_unused_fd_flags(int flags)
int fd, error;
struct fdtable *fdt;
- error = -EMFILE;
spin_lock(&files->file_lock);
repeat:
@@ -990,13 +979,6 @@ repeat:
fd = find_next_zero_bit(fdt->open_fds->fds_bits, fdt->max_fds,
files->next_fd);
- /*
- * N.B. For clone tasks sharing a files structure, this test
- * will limit the total number of files that can be opened.
- */
- if (fd >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
- goto out;
-
/* Do we need to expand the fd array or fd set? */
error = expand_files(files, fd);
if (error < 0)
@@ -1007,7 +989,6 @@ repeat:
* If we needed to expand the fs array we
* might have blocked - try again.
*/
- error = -EMFILE;
goto repeat;
}
diff --git a/fs/pipe.c b/fs/pipe.c
index 10c4e9aa5c49..fcba6542b8d0 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -777,45 +777,10 @@ pipe_rdwr_open(struct inode *inode, struct file *filp)
/*
* The file_operations structs are not static because they
* are also used in linux/fs/fifo.c to do operations on FIFOs.
+ *
+ * Pipes reuse fifos' file_operations structs.
*/
-const struct file_operations read_fifo_fops = {
- .llseek = no_llseek,
- .read = do_sync_read,
- .aio_read = pipe_read,
- .write = bad_pipe_w,
- .poll = pipe_poll,
- .unlocked_ioctl = pipe_ioctl,
- .open = pipe_read_open,
- .release = pipe_read_release,
- .fasync = pipe_read_fasync,
-};
-
-const struct file_operations write_fifo_fops = {
- .llseek = no_llseek,
- .read = bad_pipe_r,
- .write = do_sync_write,
- .aio_write = pipe_write,
- .poll = pipe_poll,
- .unlocked_ioctl = pipe_ioctl,
- .open = pipe_write_open,
- .release = pipe_write_release,
- .fasync = pipe_write_fasync,
-};
-
-const struct file_operations rdwr_fifo_fops = {
- .llseek = no_llseek,
- .read = do_sync_read,
- .aio_read = pipe_read,
- .write = do_sync_write,
- .aio_write = pipe_write,
- .poll = pipe_poll,
- .unlocked_ioctl = pipe_ioctl,
- .open = pipe_rdwr_open,
- .release = pipe_rdwr_release,
- .fasync = pipe_rdwr_fasync,
-};
-
-static const struct file_operations read_pipe_fops = {
+const struct file_operations read_pipefifo_fops = {
.llseek = no_llseek,
.read = do_sync_read,
.aio_read = pipe_read,
@@ -827,7 +792,7 @@ static const struct file_operations read_pipe_fops = {
.fasync = pipe_read_fasync,
};
-static const struct file_operations write_pipe_fops = {
+const struct file_operations write_pipefifo_fops = {
.llseek = no_llseek,
.read = bad_pipe_r,
.write = do_sync_write,
@@ -839,7 +804,7 @@ static const struct file_operations write_pipe_fops = {
.fasync = pipe_write_fasync,
};
-static const struct file_operations rdwr_pipe_fops = {
+const struct file_operations rdwr_pipefifo_fops = {
.llseek = no_llseek,
.read = do_sync_read,
.aio_read = pipe_read,
@@ -927,7 +892,7 @@ static struct inode * get_pipe_inode(void)
inode->i_pipe = pipe;
pipe->readers = pipe->writers = 1;
- inode->i_fop = &rdwr_pipe_fops;
+ inode->i_fop = &rdwr_pipefifo_fops;
/*
* Mark the inode dirty from the very beginning,
@@ -978,7 +943,7 @@ struct file *create_write_pipe(int flags)
d_instantiate(dentry, inode);
err = -ENFILE;
- f = alloc_file(pipe_mnt, dentry, FMODE_WRITE, &write_pipe_fops);
+ f = alloc_file(pipe_mnt, dentry, FMODE_WRITE, &write_pipefifo_fops);
if (!f)
goto err_dentry;
f->f_mapping = inode->i_mapping;
@@ -1020,7 +985,7 @@ struct file *create_read_pipe(struct file *wrf, int flags)
f->f_pos = 0;
f->f_flags = O_RDONLY | (flags & O_NONBLOCK);
- f->f_op = &read_pipe_fops;
+ f->f_op = &read_pipefifo_fops;
f->f_mode = FMODE_READ;
f->f_version = 0;
diff --git a/fs/proc/base.c b/fs/proc/base.c
index d744aa3c9f74..e74308bdabd3 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1859,8 +1859,7 @@ static const struct file_operations proc_fd_operations = {
* /proc/pid/fd needs a special permission handler so that a process can still
* access /proc/self/fd after it has executed a setuid().
*/
-static int proc_fd_permission(struct inode *inode, int mask,
- struct nameidata *nd)
+static int proc_fd_permission(struct inode *inode, int mask)
{
int rv;
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index b37f25dc45a5..8bb03f056c28 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -17,6 +17,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/smp_lock.h>
+#include <linux/sysctl.h>
#include <asm/system.h>
#include <asm/uaccess.h>
@@ -65,6 +66,8 @@ static void proc_delete_inode(struct inode *inode)
module_put(de->owner);
de_put(de);
}
+ if (PROC_I(inode)->sysctl)
+ sysctl_head_put(PROC_I(inode)->sysctl);
clear_inode(inode);
}
@@ -84,6 +87,8 @@ static struct inode *proc_alloc_inode(struct super_block *sb)
ei->fd = 0;
ei->op.proc_get_link = NULL;
ei->pde = NULL;
+ ei->sysctl = NULL;
+ ei->sysctl_entry = NULL;
inode = &ei->vfs_inode;
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
return inode;
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 5acc001d49f6..f9a8b892718f 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -10,149 +10,110 @@
static struct dentry_operations proc_sys_dentry_operations;
static const struct file_operations proc_sys_file_operations;
static const struct inode_operations proc_sys_inode_operations;
+static const struct file_operations proc_sys_dir_file_operations;
+static const struct inode_operations proc_sys_dir_operations;
-static void proc_sys_refresh_inode(struct inode *inode, struct ctl_table *table)
-{
- /* Refresh the cached information bits in the inode */
- if (table) {
- inode->i_uid = 0;
- inode->i_gid = 0;
- inode->i_mode = table->mode;
- if (table->proc_handler) {
- inode->i_mode |= S_IFREG;
- inode->i_nlink = 1;
- } else {
- inode->i_mode |= S_IFDIR;
- inode->i_nlink = 0; /* It is too hard to figure out */
- }
- }
-}
-
-static struct inode *proc_sys_make_inode(struct inode *dir, struct ctl_table *table)
+static struct inode *proc_sys_make_inode(struct super_block *sb,
+ struct ctl_table_header *head, struct ctl_table *table)
{
struct inode *inode;
- struct proc_inode *dir_ei, *ei;
- int depth;
+ struct proc_inode *ei;
- inode = new_inode(dir->i_sb);
+ inode = new_inode(sb);
if (!inode)
goto out;
- /* A directory is always one deeper than it's parent */
- dir_ei = PROC_I(dir);
- depth = dir_ei->fd + 1;
-
+ sysctl_head_get(head);
ei = PROC_I(inode);
- ei->fd = depth;
+ ei->sysctl = head;
+ ei->sysctl_entry = table;
+
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
- inode->i_op = &proc_sys_inode_operations;
- inode->i_fop = &proc_sys_file_operations;
inode->i_flags |= S_PRIVATE; /* tell selinux to ignore this inode */
- proc_sys_refresh_inode(inode, table);
+ inode->i_mode = table->mode;
+ if (!table->child) {
+ inode->i_mode |= S_IFREG;
+ inode->i_op = &proc_sys_inode_operations;
+ inode->i_fop = &proc_sys_file_operations;
+ } else {
+ inode->i_mode |= S_IFDIR;
+ inode->i_nlink = 0;
+ inode->i_op = &proc_sys_dir_operations;
+ inode->i_fop = &proc_sys_dir_file_operations;
+ }
out:
return inode;
}
-static struct dentry *proc_sys_ancestor(struct dentry *dentry, int depth)
-{
- for (;;) {
- struct proc_inode *ei;
-
- ei = PROC_I(dentry->d_inode);
- if (ei->fd == depth)
- break; /* found */
-
- dentry = dentry->d_parent;
- }
- return dentry;
-}
-
-static struct ctl_table *proc_sys_lookup_table_one(struct ctl_table *table,
- struct qstr *name)
+static struct ctl_table *find_in_table(struct ctl_table *p, struct qstr *name)
{
int len;
- for ( ; table->ctl_name || table->procname; table++) {
+ for ( ; p->ctl_name || p->procname; p++) {
- if (!table->procname)
+ if (!p->procname)
continue;
- len = strlen(table->procname);
+ len = strlen(p->procname);
if (len != name->len)
continue;
- if (memcmp(table->procname, name->name, len) != 0)
+ if (memcmp(p->procname, name->name, len) != 0)
continue;
/* I have a match */
- return table;
+ return p;
}
return NULL;
}
-static struct ctl_table *proc_sys_lookup_table(struct dentry *dentry,
- struct ctl_table *table)
+struct ctl_table_header *grab_header(struct inode *inode)
{
- struct dentry *ancestor;
- struct proc_inode *ei;
- int depth, i;
+ if (PROC_I(inode)->sysctl)
+ return sysctl_head_grab(PROC_I(inode)->sysctl);
+ else
+ return sysctl_head_next(NULL);
+}
- ei = PROC_I(dentry->d_inode);
- depth = ei->fd;
+static struct dentry *proc_sys_lookup(struct inode *dir, struct dentry *dentry,
+ struct nameidata *nd)
+{
+ struct ctl_table_header *head = grab_header(dir);
+ struct ctl_table *table = PROC_I(dir)->sysctl_entry;
+ struct ctl_table_header *h = NULL;
+ struct qstr *name = &dentry->d_name;
+ struct ctl_table *p;
+ struct inode *inode;
+ struct dentry *err = ERR_PTR(-ENOENT);
- if (depth == 0)
- return table;
+ if (IS_ERR(head))
+ return ERR_CAST(head);
- for (i = 1; table && (i <= depth); i++) {
- ancestor = proc_sys_ancestor(dentry, i);
- table = proc_sys_lookup_table_one(table, &ancestor->d_name);
- if (table)
- table = table->child;
+ if (table && !table->child) {
+ WARN_ON(1);
+ goto out;
}
- return table;
-
-}
-static struct ctl_table *proc_sys_lookup_entry(struct dentry *dparent,
- struct qstr *name,
- struct ctl_table *table)
-{
- table = proc_sys_lookup_table(dparent, table);
- if (table)
- table = proc_sys_lookup_table_one(table, name);
- return table;
-}
-static struct ctl_table *do_proc_sys_lookup(struct dentry *parent,
- struct qstr *name,
- struct ctl_table_header **ptr)
-{
- struct ctl_table_header *head;
- struct ctl_table *table = NULL;
+ table = table ? table->child : head->ctl_table;
- for (head = sysctl_head_next(NULL); head;
- head = sysctl_head_next(head)) {
- table = proc_sys_lookup_entry(parent, name, head->ctl_table);
- if (table)
- break;
+ p = find_in_table(table, name);
+ if (!p) {
+ for (h = sysctl_head_next(NULL); h; h = sysctl_head_next(h)) {
+ if (h->attached_to != table)
+ continue;
+ p = find_in_table(h->attached_by, name);
+ if (p)
+ break;
+ }
}
- *ptr = head;
- return table;
-}
-
-static struct dentry *proc_sys_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
-{
- struct ctl_table_header *head;
- struct inode *inode;
- struct dentry *err;
- struct ctl_table *table;
- err = ERR_PTR(-ENOENT);
- table = do_proc_sys_lookup(dentry->d_parent, &dentry->d_name, &head);
- if (!table)
+ if (!p)
goto out;
err = ERR_PTR(-ENOMEM);
- inode = proc_sys_make_inode(dir, table);
+ inode = proc_sys_make_inode(dir->i_sb, h ? h : head, p);
+ if (h)
+ sysctl_head_finish(h);
+
if (!inode)
goto out;
@@ -168,22 +129,14 @@ out:
static ssize_t proc_sys_call_handler(struct file *filp, void __user *buf,
size_t count, loff_t *ppos, int write)
{
- struct dentry *dentry = filp->f_dentry;
- struct ctl_table_header *head;
- struct ctl_table *table;
+ struct inode *inode = filp->f_path.dentry->d_inode;
+ struct ctl_table_header *head = grab_header(inode);
+ struct ctl_table *table = PROC_I(inode)->sysctl_entry;
ssize_t error;
size_t res;
- table = do_proc_sys_lookup(dentry->d_parent, &dentry->d_name, &head);
- /* Has the sysctl entry disappeared on us? */
- error = -ENOENT;
- if (!table)
- goto out;
-
- /* Has the sysctl entry been replaced by a directory? */
- error = -EISDIR;
- if (!table->proc_handler)
- goto out;
+ if (IS_ERR(head))
+ return PTR_ERR(head);
/*
* At this point we know that the sysctl was not unregistered
@@ -193,6 +146,11 @@ static ssize_t proc_sys_call_handler(struct file *filp, void __user *buf,
if (sysctl_perm(head->root, table, write ? MAY_WRITE : MAY_READ))
goto out;
+ /* if that can happen at all, it should be -EINVAL, not -EISDIR */
+ error = -EINVAL;
+ if (!table->proc_handler)
+ goto out;
+
/* careful: calling conventions are nasty here */
res = count;
error = table->proc_handler(table, write, filp, buf, &res, ppos);
@@ -218,82 +176,86 @@ static ssize_t proc_sys_write(struct file *filp, const char __user *buf,
static int proc_sys_fill_cache(struct file *filp, void *dirent,
- filldir_t filldir, struct ctl_table *table)
+ filldir_t filldir,
+ struct ctl_table_header *head,
+ struct ctl_table *table)
{
- struct ctl_table_header *head;
- struct ctl_table *child_table = NULL;
struct dentry *child, *dir = filp->f_path.dentry;
struct inode *inode;
struct qstr qname;
ino_t ino = 0;
unsigned type = DT_UNKNOWN;
- int ret;
qname.name = table->procname;
qname.len = strlen(table->procname);
qname.hash = full_name_hash(qname.name, qname.len);
- /* Suppress duplicates.
- * Only fill a directory entry if it is the value that
- * an ordinary lookup of that name returns. Hide all
- * others.
- *
- * If we ever cache this translation in the dcache
- * I should do a dcache lookup first. But for now
- * it is just simpler not to.
- */
- ret = 0;
- child_table = do_proc_sys_lookup(dir, &qname, &head);
- sysctl_head_finish(head);
- if (child_table != table)
- return 0;
-
child = d_lookup(dir, &qname);
if (!child) {
- struct dentry *new;
- new = d_alloc(dir, &qname);
- if (new) {
- inode = proc_sys_make_inode(dir->d_inode, table);
- if (!inode)
- child = ERR_PTR(-ENOMEM);
- else {
- new->d_op = &proc_sys_dentry_operations;
- d_add(new, inode);
+ child = d_alloc(dir, &qname);
+ if (child) {
+ inode = proc_sys_make_inode(dir->d_sb, head, table);
+ if (!inode) {
+ dput(child);
+ return -ENOMEM;
+ } else {
+ child->d_op = &proc_sys_dentry_operations;
+ d_add(child, inode);
}
- if (child)
- dput(new);
- else
- child = new;
+ } else {
+ return -ENOMEM;
}
}
- if (!child || IS_ERR(child) || !child->d_inode)
- goto end_instantiate;
inode = child->d_inode;
- if (inode) {
- ino = inode->i_ino;
- type = inode->i_mode >> 12;
- }
+ ino = inode->i_ino;
+ type = inode->i_mode >> 12;
dput(child);
-end_instantiate:
- if (!ino)
- ino= find_inode_number(dir, &qname);
- if (!ino)
- ino = 1;
- return filldir(dirent, qname.name, qname.len, filp->f_pos, ino, type);
+ return !!filldir(dirent, qname.name, qname.len, filp->f_pos, ino, type);
+}
+
+static int scan(struct ctl_table_header *head, ctl_table *table,
+ unsigned long *pos, struct file *file,
+ void *dirent, filldir_t filldir)
+{
+
+ for (; table->ctl_name || table->procname; table++, (*pos)++) {
+ int res;
+
+ /* Can't do anything without a proc name */
+ if (!table->procname)
+ continue;
+
+ if (*pos < file->f_pos)
+ continue;
+
+ res = proc_sys_fill_cache(file, dirent, filldir, head, table);
+ if (res)
+ return res;
+
+ file->f_pos = *pos + 1;
+ }
+ return 0;
}
static int proc_sys_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
- struct dentry *dentry = filp->f_dentry;
+ struct dentry *dentry = filp->f_path.dentry;
struct inode *inode = dentry->d_inode;
- struct ctl_table_header *head = NULL;
- struct ctl_table *table;
+ struct ctl_table_header *head = grab_header(inode);
+ struct ctl_table *table = PROC_I(inode)->sysctl_entry;
+ struct ctl_table_header *h = NULL;
unsigned long pos;
- int ret;
+ int ret = -EINVAL;
+
+ if (IS_ERR(head))
+ return PTR_ERR(head);
- ret = -ENOTDIR;
- if (!S_ISDIR(inode->i_mode))
+ if (table && !table->child) {
+ WARN_ON(1);
goto out;
+ }
+
+ table = table ? table->child : head->ctl_table;
ret = 0;
/* Avoid a switch here: arm builds fail with missing __cmpdi2 */
@@ -311,30 +273,17 @@ static int proc_sys_readdir(struct file *filp, void *dirent, filldir_t filldir)
}
pos = 2;
- /* - Find each instance of the directory
- * - Read all entries in each instance
- * - Before returning an entry to user space lookup the entry
- * by name and if I find a different entry don't return
- * this one because it means it is a buried dup.
- * For sysctl this should only happen for directory entries.
- */
- for (head = sysctl_head_next(NULL); head; head = sysctl_head_next(head)) {
- table = proc_sys_lookup_table(dentry, head->ctl_table);
+ ret = scan(head, table, &pos, filp, dirent, filldir);
+ if (ret)
+ goto out;
- if (!table)
+ for (h = sysctl_head_next(NULL); h; h = sysctl_head_next(h)) {
+ if (h->attached_to != table)
continue;
-
- for (; table->ctl_name || table->procname; table++, pos++) {
- /* Can't do anything without a proc name */
- if (!table->procname)
- continue;
-
- if (pos < filp->f_pos)
- continue;
-
- if (proc_sys_fill_cache(filp, dirent, filldir, table) < 0)
- goto out;
- filp->f_pos = pos + 1;
+ ret = scan(h, h->attached_by, &pos, filp, dirent, filldir);
+ if (ret) {
+ sysctl_head_finish(h);
+ break;
}
}
ret = 1;
@@ -343,53 +292,24 @@ out:
return ret;
}
-static int proc_sys_permission(struct inode *inode, int mask, struct nameidata *nd)
+static int proc_sys_permission(struct inode *inode, int mask)
{
/*
* sysctl entries that are not writeable,
* are _NOT_ writeable, capabilities or not.
*/
- struct ctl_table_header *head;
- struct ctl_table *table;
- struct dentry *dentry;
- int mode;
- int depth;
+ struct ctl_table_header *head = grab_header(inode);
+ struct ctl_table *table = PROC_I(inode)->sysctl_entry;
int error;
- head = NULL;
- depth = PROC_I(inode)->fd;
-
- /* First check the cached permissions, in case we don't have
- * enough information to lookup the sysctl table entry.
- */
- error = -EACCES;
- mode = inode->i_mode;
-
- if (current->euid == 0)
- mode >>= 6;
- else if (in_group_p(0))
- mode >>= 3;
-
- if ((mode & mask & (MAY_READ|MAY_WRITE|MAY_EXEC)) == mask)
- error = 0;
-
- /* If we can't get a sysctl table entry the permission
- * checks on the cached mode will have to be enough.
- */
- if (!nd || !depth)
- goto out;
+ if (IS_ERR(head))
+ return PTR_ERR(head);
- dentry = nd->path.dentry;
- table = do_proc_sys_lookup(dentry->d_parent, &dentry->d_name, &head);
+ if (!table) /* global root - r-xr-xr-x */
+ error = mask & MAY_WRITE ? -EACCES : 0;
+ else /* Use the permissions on the sysctl table entry */
+ error = sysctl_perm(head->root, table, mask);
- /* If the entry does not exist deny permission */
- error = -EACCES;
- if (!table)
- goto out;
-
- /* Use the permissions on the sysctl table entry */
- error = sysctl_perm(head->root, table, mask);
-out:
sysctl_head_finish(head);
return error;
}
@@ -409,33 +329,70 @@ static int proc_sys_setattr(struct dentry *dentry, struct iattr *attr)
return error;
}
-/* I'm lazy and don't distinguish between files and directories,
- * until access time.
- */
+static int proc_sys_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
+{
+ struct inode *inode = dentry->d_inode;
+ struct ctl_table_header *head = grab_header(inode);
+ struct ctl_table *table = PROC_I(inode)->sysctl_entry;
+
+ if (IS_ERR(head))
+ return PTR_ERR(head);
+
+ generic_fillattr(inode, stat);
+ if (table)
+ stat->mode = (stat->mode & S_IFMT) | table->mode;
+
+ sysctl_head_finish(head);
+ return 0;
+}
+
static const struct file_operations proc_sys_file_operations = {
.read = proc_sys_read,
.write = proc_sys_write,
+};
+
+static const struct file_operations proc_sys_dir_file_operations = {
.readdir = proc_sys_readdir,
};
static const struct inode_operations proc_sys_inode_operations = {
+ .permission = proc_sys_permission,
+ .setattr = proc_sys_setattr,
+ .getattr = proc_sys_getattr,
+};
+
+static const struct inode_operations proc_sys_dir_operations = {
.lookup = proc_sys_lookup,
.permission = proc_sys_permission,
.setattr = proc_sys_setattr,
+ .getattr = proc_sys_getattr,
};
static int proc_sys_revalidate(struct dentry *dentry, struct nameidata *nd)
{
- struct ctl_table_header *head;
- struct ctl_table *table;
- table = do_proc_sys_lookup(dentry->d_parent, &dentry->d_name, &head);
- proc_sys_refresh_inode(dentry->d_inode, table);
- sysctl_head_finish(head);
- return !!table;
+ return !PROC_I(dentry->d_inode)->sysctl->unregistering;
+}
+
+static int proc_sys_delete(struct dentry *dentry)
+{
+ return !!PROC_I(dentry->d_inode)->sysctl->unregistering;
+}
+
+static int proc_sys_compare(struct dentry *dir, struct qstr *qstr,
+ struct qstr *name)
+{
+ struct dentry *dentry = container_of(qstr, struct dentry, d_name);
+ if (qstr->len != name->len)
+ return 1;
+ if (memcmp(qstr->name, name->name, name->len))
+ return 1;
+ return !sysctl_is_seen(PROC_I(dentry->d_inode)->sysctl);
}
static struct dentry_operations proc_sys_dentry_operations = {
.d_revalidate = proc_sys_revalidate,
+ .d_delete = proc_sys_delete,
+ .d_compare = proc_sys_compare,
};
static struct proc_dir_entry *proc_sys_root;
@@ -443,8 +400,8 @@ static struct proc_dir_entry *proc_sys_root;
int proc_sys_init(void)
{
proc_sys_root = proc_mkdir("sys", NULL);
- proc_sys_root->proc_iops = &proc_sys_inode_operations;
- proc_sys_root->proc_fops = &proc_sys_file_operations;
+ proc_sys_root->proc_iops = &proc_sys_dir_operations;
+ proc_sys_root->proc_fops = &proc_sys_dir_file_operations;
proc_sys_root->nlink = 0;
return 0;
}
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index d7c4935c1034..bb3cb5b7cdb2 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -1250,7 +1250,7 @@ static int reiserfs_check_acl(struct inode *inode, int mask)
return error;
}
-int reiserfs_permission(struct inode *inode, int mask, struct nameidata *nd)
+int reiserfs_permission(struct inode *inode, int mask)
{
/*
* We don't do permission checks on the internal objects.
diff --git a/fs/smbfs/file.c b/fs/smbfs/file.c
index 2294783320cb..e4f8d51a5553 100644
--- a/fs/smbfs/file.c
+++ b/fs/smbfs/file.c
@@ -408,7 +408,7 @@ smb_file_release(struct inode *inode, struct file * file)
* privileges, so we need our own check for this.
*/
static int
-smb_file_permission(struct inode *inode, int mask, struct nameidata *nd)
+smb_file_permission(struct inode *inode, int mask)
{
int mode = inode->i_mode;
int error = 0;
@@ -417,7 +417,7 @@ smb_file_permission(struct inode *inode, int mask, struct nameidata *nd)
/* Look at user permissions */
mode >>= 6;
- if ((mode & 7 & mask) != mask)
+ if (mask & ~mode & (MAY_READ | MAY_WRITE | MAY_EXEC))
error = -EACCES;
return error;
}
diff --git a/fs/splice.c b/fs/splice.c
index 47dc1a445d1f..b30311ba8af6 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -772,7 +772,7 @@ generic_file_splice_write_nolock(struct pipe_inode_info *pipe, struct file *out,
ssize_t ret;
int err;
- err = remove_suid(out->f_path.dentry);
+ err = file_remove_suid(out);
if (unlikely(err))
return err;
@@ -830,7 +830,7 @@ generic_file_splice_write(struct pipe_inode_info *pipe, struct file *out,
ssize_t ret;
inode_double_lock(inode, pipe->inode);
- ret = remove_suid(out->f_path.dentry);
+ ret = file_remove_suid(out);
if (likely(!ret))
ret = __splice_from_pipe(pipe, &sd, pipe_to_file);
inode_double_unlock(inode, pipe->inode);
diff --git a/fs/stat.c b/fs/stat.c
index 9cf41f719d50..7c46fbeb8b76 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -57,13 +57,13 @@ EXPORT_SYMBOL(vfs_getattr);
int vfs_stat_fd(int dfd, char __user *name, struct kstat *stat)
{
- struct nameidata nd;
+ struct path path;
int error;
- error = __user_walk_fd(dfd, name, LOOKUP_FOLLOW, &nd);
+ error = user_path_at(dfd, name, LOOKUP_FOLLOW, &path);
if (!error) {
- error = vfs_getattr(nd.path.mnt, nd.path.dentry, stat);
- path_put(&nd.path);
+ error = vfs_getattr(path.mnt, path.dentry, stat);
+ path_put(&path);
}
return error;
}
@@ -77,13 +77,13 @@ EXPORT_SYMBOL(vfs_stat);
int vfs_lstat_fd(int dfd, char __user *name, struct kstat *stat)
{
- struct nameidata nd;
+ struct path path;
int error;
- error = __user_walk_fd(dfd, name, 0, &nd);
+ error = user_path_at(dfd, name, 0, &path);
if (!error) {
- error = vfs_getattr(nd.path.mnt, nd.path.dentry, stat);
- path_put(&nd.path);
+ error = vfs_getattr(path.mnt, path.dentry, stat);
+ path_put(&path);
}
return error;
}
@@ -291,29 +291,29 @@ asmlinkage long sys_newfstat(unsigned int fd, struct stat __user *statbuf)
return error;
}
-asmlinkage long sys_readlinkat(int dfd, const char __user *path,
+asmlinkage long sys_readlinkat(int dfd, const char __user *pathname,
char __user *buf, int bufsiz)
{
- struct nameidata nd;
+ struct path path;
int error;
if (bufsiz <= 0)
return -EINVAL;
- error = __user_walk_fd(dfd, path, 0, &nd);
+ error = user_path_at(dfd, pathname, 0, &path);
if (!error) {
- struct inode *inode = nd.path.dentry->d_inode;
+ struct inode *inode = path.dentry->d_inode;
error = -EINVAL;
if (inode->i_op && inode->i_op->readlink) {
- error = security_inode_readlink(nd.path.dentry);
+ error = security_inode_readlink(path.dentry);
if (!error) {
- touch_atime(nd.path.mnt, nd.path.dentry);
- error = inode->i_op->readlink(nd.path.dentry,
+ touch_atime(path.mnt, path.dentry);
+ error = inode->i_op->readlink(path.dentry,
buf, bufsiz);
}
}
- path_put(&nd.path);
+ path_put(&path);
}
return error;
}
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index 005a3b854d96..8565e586e533 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -53,6 +53,7 @@
#include "ubifs.h"
#include <linux/mount.h>
+#include <linux/namei.h>
static int read_block(struct inode *inode, void *addr, unsigned int block,
struct ubifs_data_node *dn)
diff --git a/fs/utimes.c b/fs/utimes.c
index b6b664e7145e..6929e3e91d05 100644
--- a/fs/utimes.c
+++ b/fs/utimes.c
@@ -48,66 +48,22 @@ static bool nsec_valid(long nsec)
return nsec >= 0 && nsec <= 999999999;
}
-/* If times==NULL, set access and modification to current time,
- * must be owner or have write permission.
- * Else, update from *times, must be owner or super user.
- */
-long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags)
+static int utimes_common(struct path *path, struct timespec *times)
{
int error;
- struct nameidata nd;
- struct dentry *dentry;
- struct inode *inode;
struct iattr newattrs;
- struct file *f = NULL;
- struct vfsmount *mnt;
-
- error = -EINVAL;
- if (times && (!nsec_valid(times[0].tv_nsec) ||
- !nsec_valid(times[1].tv_nsec))) {
- goto out;
- }
-
- if (flags & ~AT_SYMLINK_NOFOLLOW)
- goto out;
-
- if (filename == NULL && dfd != AT_FDCWD) {
- error = -EINVAL;
- if (flags & AT_SYMLINK_NOFOLLOW)
- goto out;
+ struct inode *inode = path->dentry->d_inode;
- error = -EBADF;
- f = fget(dfd);
- if (!f)
- goto out;
- dentry = f->f_path.dentry;
- mnt = f->f_path.mnt;
- } else {
- error = __user_walk_fd(dfd, filename, (flags & AT_SYMLINK_NOFOLLOW) ? 0 : LOOKUP_FOLLOW, &nd);
- if (error)
- goto out;
-
- dentry = nd.path.dentry;
- mnt = nd.path.mnt;
- }
-
- inode = dentry->d_inode;
-
- error = mnt_want_write(mnt);
+ error = mnt_want_write(path->mnt);
if (error)
- goto dput_and_out;
+ goto out;
if (times && times[0].tv_nsec == UTIME_NOW &&
times[1].tv_nsec == UTIME_NOW)
times = NULL;
- /* In most cases, the checks are done in inode_change_ok() */
newattrs.ia_valid = ATTR_CTIME | ATTR_MTIME | ATTR_ATIME;
if (times) {
- error = -EPERM;
- if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
- goto mnt_drop_write_and_out;
-
if (times[0].tv_nsec == UTIME_OMIT)
newattrs.ia_valid &= ~ATTR_ATIME;
else if (times[0].tv_nsec != UTIME_NOW) {
@@ -123,21 +79,13 @@ long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags
newattrs.ia_mtime.tv_nsec = times[1].tv_nsec;
newattrs.ia_valid |= ATTR_MTIME_SET;
}
-
/*
- * For the UTIME_OMIT/UTIME_NOW and UTIME_NOW/UTIME_OMIT
- * cases, we need to make an extra check that is not done by
- * inode_change_ok().
+ * Tell inode_change_ok(), that this is an explicit time
+ * update, even if neither ATTR_ATIME_SET nor ATTR_MTIME_SET
+ * were used.
*/
- if (((times[0].tv_nsec == UTIME_NOW &&
- times[1].tv_nsec == UTIME_OMIT)
- ||
- (times[0].tv_nsec == UTIME_OMIT &&
- times[1].tv_nsec == UTIME_NOW))
- && !is_owner_or_cap(inode))
- goto mnt_drop_write_and_out;
+ newattrs.ia_valid |= ATTR_TIMES_SET;
} else {
-
/*
* If times is NULL (or both times are UTIME_NOW),
* then we need to check permissions, because
@@ -148,21 +96,76 @@ long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags
goto mnt_drop_write_and_out;
if (!is_owner_or_cap(inode)) {
- error = permission(inode, MAY_WRITE, NULL);
+ error = inode_permission(inode, MAY_WRITE);
if (error)
goto mnt_drop_write_and_out;
}
}
mutex_lock(&inode->i_mutex);
- error = notify_change(dentry, &newattrs);
+ error = notify_change(path->dentry, &newattrs);
mutex_unlock(&inode->i_mutex);
+
mnt_drop_write_and_out:
- mnt_drop_write(mnt);
-dput_and_out:
- if (f)
- fput(f);
- else
- path_put(&nd.path);
+ mnt_drop_write(path->mnt);
+out:
+ return error;
+}
+
+/*
+ * do_utimes - change times on filename or file descriptor
+ * @dfd: open file descriptor, -1 or AT_FDCWD
+ * @filename: path name or NULL
+ * @times: new times or NULL
+ * @flags: zero or more flags (only AT_SYMLINK_NOFOLLOW for the moment)
+ *
+ * If filename is NULL and dfd refers to an open file, then operate on
+ * the file. Otherwise look up filename, possibly using dfd as a
+ * starting point.
+ *
+ * If times==NULL, set access and modification to current time,
+ * must be owner or have write permission.
+ * Else, update from *times, must be owner or super user.
+ */
+long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags)
+{
+ int error = -EINVAL;
+
+ if (times && (!nsec_valid(times[0].tv_nsec) ||
+ !nsec_valid(times[1].tv_nsec))) {
+ goto out;
+ }
+
+ if (flags & ~AT_SYMLINK_NOFOLLOW)
+ goto out;
+
+ if (filename == NULL && dfd != AT_FDCWD) {
+ struct file *file;
+
+ if (flags & AT_SYMLINK_NOFOLLOW)
+ goto out;
+
+ file = fget(dfd);
+ error = -EBADF;
+ if (!file)
+ goto out;
+
+ error = utimes_common(&file->f_path, times);
+ fput(file);
+ } else {
+ struct path path;
+ int lookup_flags = 0;
+
+ if (!(flags & AT_SYMLINK_NOFOLLOW))
+ lookup_flags |= LOOKUP_FOLLOW;
+
+ error = user_path_at(dfd, filename, lookup_flags, &path);
+ if (error)
+ goto out;
+
+ error = utimes_common(&path, times);
+ path_put(&path);
+ }
+
out:
return error;
}
diff --git a/fs/xattr.c b/fs/xattr.c
index 4706a8b1f495..468377e66531 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -63,7 +63,7 @@ xattr_permission(struct inode *inode, const char *name, int mask)
return -EPERM;
}
- return permission(inode, mask, NULL);
+ return inode_permission(inode, mask);
}
int
@@ -252,40 +252,40 @@ setxattr(struct dentry *d, const char __user *name, const void __user *value,
}
asmlinkage long
-sys_setxattr(const char __user *path, const char __user *name,
+sys_setxattr(const char __user *pathname, const char __user *name,
const void __user *value, size_t size, int flags)
{
- struct nameidata nd;
+ struct path path;
int error;
- error = user_path_walk(path, &nd);
+ error = user_path(pathname, &path);
if (error)
return error;
- error = mnt_want_write(nd.path.mnt);
+ error = mnt_want_write(path.mnt);
if (!error) {
- error = setxattr(nd.path.dentry, name, value, size, flags);
- mnt_drop_write(nd.path.mnt);
+ error = setxattr(path.dentry, name, value, size, flags);
+ mnt_drop_write(path.mnt);
}
- path_put(&nd.path);
+ path_put(&path);
return error;
}
asmlinkage long
-sys_lsetxattr(const char __user *path, const char __user *name,
+sys_lsetxattr(const char __user *pathname, const char __user *name,
const void __user *value, size_t size, int flags)
{
- struct nameidata nd;
+ struct path path;
int error;
- error = user_path_walk_link(path, &nd);
+ error = user_lpath(pathname, &path);
if (error)
return error;
- error = mnt_want_write(nd.path.mnt);
+ error = mnt_want_write(path.mnt);
if (!error) {
- error = setxattr(nd.path.dentry, name, value, size, flags);
- mnt_drop_write(nd.path.mnt);
+ error = setxattr(path.dentry, name, value, size, flags);
+ mnt_drop_write(path.mnt);
}
- path_put(&nd.path);
+ path_put(&path);
return error;
}
@@ -350,32 +350,32 @@ getxattr(struct dentry *d, const char __user *name, void __user *value,
}
asmlinkage ssize_t
-sys_getxattr(const char __user *path, const char __user *name,
+sys_getxattr(const char __user *pathname, const char __user *name,
void __user *value, size_t size)
{
- struct nameidata nd;
+ struct path path;
ssize_t error;
- error = user_path_walk(path, &nd);
+ error = user_path(pathname, &path);
if (error)
return error;
- error = getxattr(nd.path.dentry, name, value, size);
- path_put(&nd.path);
+ error = getxattr(path.dentry, name, value, size);
+ path_put(&path);
return error;
}
asmlinkage ssize_t
-sys_lgetxattr(const char __user *path, const char __user *name, void __user *value,
+sys_lgetxattr(const char __user *pathname, const char __user *name, void __user *value,
size_t size)
{
- struct nameidata nd;
+ struct path path;
ssize_t error;
- error = user_path_walk_link(path, &nd);
+ error = user_lpath(pathname, &path);
if (error)
return error;
- error = getxattr(nd.path.dentry, name, value, size);
- path_put(&nd.path);
+ error = getxattr(path.dentry, name, value, size);
+ path_put(&path);
return error;
}
@@ -425,30 +425,30 @@ listxattr(struct dentry *d, char __user *list, size_t size)
}
asmlinkage ssize_t
-sys_listxattr(const char __user *path, char __user *list, size_t size)
+sys_listxattr(const char __user *pathname, char __user *list, size_t size)
{
- struct nameidata nd;
+ struct path path;
ssize_t error;
- error = user_path_walk(path, &nd);
+ error = user_path(pathname, &path);
if (error)
return error;
- error = listxattr(nd.path.dentry, list, size);
- path_put(&nd.path);
+ error = listxattr(path.dentry, list, size);
+ path_put(&path);
return error;
}
asmlinkage ssize_t
-sys_llistxattr(const char __user *path, char __user *list, size_t size)
+sys_llistxattr(const char __user *pathname, char __user *list, size_t size)
{
- struct nameidata nd;
+ struct path path;
ssize_t error;
- error = user_path_walk_link(path, &nd);
+ error = user_lpath(pathname, &path);
if (error)
return error;
- error = listxattr(nd.path.dentry, list, size);
- path_put(&nd.path);
+ error = listxattr(path.dentry, list, size);
+ path_put(&path);
return error;
}
@@ -486,38 +486,38 @@ removexattr(struct dentry *d, const char __user *name)
}
asmlinkage long
-sys_removexattr(const char __user *path, const char __user *name)
+sys_removexattr(const char __user *pathname, const char __user *name)
{
- struct nameidata nd;
+ struct path path;
int error;
- error = user_path_walk(path, &nd);
+ error = user_path(pathname, &path);
if (error)
return error;
- error = mnt_want_write(nd.path.mnt);
+ error = mnt_want_write(path.mnt);
if (!error) {
- error = removexattr(nd.path.dentry, name);
- mnt_drop_write(nd.path.mnt);
+ error = removexattr(path.dentry, name);
+ mnt_drop_write(path.mnt);
}
- path_put(&nd.path);
+ path_put(&path);
return error;
}
asmlinkage long
-sys_lremovexattr(const char __user *path, const char __user *name)
+sys_lremovexattr(const char __user *pathname, const char __user *name)
{
- struct nameidata nd;
+ struct path path;
int error;
- error = user_path_walk_link(path, &nd);
+ error = user_lpath(pathname, &path);
if (error)
return error;
- error = mnt_want_write(nd.path.mnt);
+ error = mnt_want_write(path.mnt);
if (!error) {
- error = removexattr(nd.path.dentry, name);
- mnt_drop_write(nd.path.mnt);
+ error = removexattr(path.dentry, name);
+ mnt_drop_write(path.mnt);
}
- path_put(&nd.path);
+ path_put(&path);
return error;
}
diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c
index a42ba9d71156..01939ba2d8de 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl.c
@@ -84,17 +84,15 @@ xfs_find_handle(
switch (cmd) {
case XFS_IOC_PATH_TO_FSHANDLE:
case XFS_IOC_PATH_TO_HANDLE: {
- struct nameidata nd;
- int error;
-
- error = user_path_walk_link((const char __user *)hreq.path, &nd);
+ struct path path;
+ int error = user_lpath((const char __user *)hreq.path, &path);
if (error)
return error;
- ASSERT(nd.path.dentry);
- ASSERT(nd.path.dentry->d_inode);
- inode = igrab(nd.path.dentry->d_inode);
- path_put(&nd.path);
+ ASSERT(path.dentry);
+ ASSERT(path.dentry->d_inode);
+ inode = igrab(path.dentry->d_inode);
+ path_put(&path);
break;
}
diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c
index 2bf287ef5489..5fc61c824bb9 100644
--- a/fs/xfs/linux-2.6/xfs_iops.c
+++ b/fs/xfs/linux-2.6/xfs_iops.c
@@ -589,8 +589,7 @@ xfs_check_acl(
STATIC int
xfs_vn_permission(
struct inode *inode,
- int mask,
- struct nameidata *nd)
+ int mask)
{
return generic_permission(inode, mask, xfs_check_acl);
}
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 5e3b57516ec7..82333b3e118e 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -711,7 +711,7 @@ start:
!capable(CAP_FSETID)) {
error = xfs_write_clear_setuid(xip);
if (likely(!error))
- error = -remove_suid(file->f_path.dentry);
+ error = -file_remove_suid(file);
if (unlikely(error)) {
goto out_unlock_internal;
}