Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull more VFS bits from Al Viro:
"Unfortunately, it looks like xattr series will have to wait until the
next cycle ;-/
This pile contains 9p cleanups and fixes (races in v9fs_fid_add()
etc), fixup for nommu breakage in shmem.c, several cleanups and a bit
more file_inode() work"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
constify path_get/path_put and fs_struct.c stuff
fix nommu breakage in shmem.c
cache the value of file_inode() in struct file
9p: if v9fs_fid_lookup() gets to asking server, it'd better have hashed dentry
9p: make sure ->lookup() adds fid to the right dentry
9p: untangle ->lookup() a bit
9p: double iput() in ->lookup() if d_materialise_unique() fails
9p: v9fs_fid_add() can't fail now
v9fs: get rid of v9fs_dentry
9p: turn fid->dlist into hlist
9p: don't bother with private lock in ->d_fsdata; dentry->d_lock will do just fine
more file_inode() open-coded instances
selinux: opened file can't have NULL or negative ->f_path.dentry
(In the meantime, the hlist traversal macros have changed, so this
required a semantic conflict fixup for the newly hlistified fid->dlist)
diff --git a/arch/s390/hypfs/inode.c b/arch/s390/hypfs/inode.c
index 280ded8..8538015 100644
--- a/arch/s390/hypfs/inode.c
+++ b/arch/s390/hypfs/inode.c
@@ -171,12 +171,10 @@
unsigned long nr_segs, loff_t offset)
{
int rc;
- struct super_block *sb;
- struct hypfs_sb_info *fs_info;
+ struct super_block *sb = file_inode(iocb->ki_filp)->i_sb;
+ struct hypfs_sb_info *fs_info = sb->s_fs_info;
size_t count = iov_length(iov, nr_segs);
- sb = iocb->ki_filp->f_path.dentry->d_inode->i_sb;
- fs_info = sb->s_fs_info;
/*
* Currently we only allow one update per second for two reasons:
* 1. diag 204 is VERY expensive
diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c
index 4929502..ce13049 100644
--- a/arch/x86/kernel/msr.c
+++ b/arch/x86/kernel/msr.c
@@ -71,7 +71,7 @@
u32 __user *tmp = (u32 __user *) buf;
u32 data[2];
u32 reg = *ppos;
- int cpu = iminor(file->f_path.dentry->d_inode);
+ int cpu = iminor(file_inode(file));
int err = 0;
ssize_t bytes = 0;
@@ -99,7 +99,7 @@
const u32 __user *tmp = (const u32 __user *)buf;
u32 data[2];
u32 reg = *ppos;
- int cpu = iminor(file->f_path.dentry->d_inode);
+ int cpu = iminor(file_inode(file));
int err = 0;
ssize_t bytes = 0;
@@ -125,7 +125,7 @@
{
u32 __user *uregs = (u32 __user *)arg;
u32 regs[8];
- int cpu = iminor(file->f_path.dentry->d_inode);
+ int cpu = iminor(file_inode(file));
int err;
switch (ioc) {
@@ -171,13 +171,12 @@
static int msr_open(struct inode *inode, struct file *file)
{
- unsigned int cpu;
+ unsigned int cpu = iminor(file_inode(file));
struct cpuinfo_x86 *c;
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
- cpu = iminor(file->f_path.dentry->d_inode);
if (cpu >= nr_cpu_ids || !cpu_online(cpu))
return -ENXIO; /* No such CPU */
diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
index 195d56d..e336b28 100644
--- a/drivers/staging/comedi/comedi_fops.c
+++ b/drivers/staging/comedi/comedi_fops.c
@@ -580,7 +580,7 @@
struct comedi_devinfo __user *arg,
struct file *file)
{
- const unsigned minor = iminor(file->f_dentry->d_inode);
+ const unsigned minor = iminor(file_inode(file));
struct comedi_file_info *info = comedi_file_info_from_minor(minor);
struct comedi_subdevice *s;
struct comedi_devinfo devinfo;
@@ -1615,7 +1615,7 @@
static long comedi_unlocked_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
- const unsigned minor = iminor(file->f_dentry->d_inode);
+ const unsigned minor = iminor(file_inode(file));
struct comedi_file_info *info = comedi_file_info_from_minor(minor);
struct comedi_device *dev = comedi_dev_from_file_info(info);
int rc;
@@ -1743,7 +1743,7 @@
static int comedi_mmap(struct file *file, struct vm_area_struct *vma)
{
- const unsigned minor = iminor(file->f_dentry->d_inode);
+ const unsigned minor = iminor(file_inode(file));
struct comedi_file_info *info = comedi_file_info_from_minor(minor);
struct comedi_device *dev = comedi_dev_from_file_info(info);
struct comedi_subdevice *s;
@@ -1823,7 +1823,7 @@
static unsigned int comedi_poll(struct file *file, poll_table *wait)
{
unsigned int mask = 0;
- const unsigned minor = iminor(file->f_dentry->d_inode);
+ const unsigned minor = iminor(file_inode(file));
struct comedi_file_info *info = comedi_file_info_from_minor(minor);
struct comedi_device *dev = comedi_dev_from_file_info(info);
struct comedi_subdevice *s;
@@ -1869,7 +1869,7 @@
struct comedi_async *async;
int n, m, count = 0, retval = 0;
DECLARE_WAITQUEUE(wait, current);
- const unsigned minor = iminor(file->f_dentry->d_inode);
+ const unsigned minor = iminor(file_inode(file));
struct comedi_file_info *info = comedi_file_info_from_minor(minor);
struct comedi_device *dev = comedi_dev_from_file_info(info);
@@ -1964,7 +1964,7 @@
struct comedi_async *async;
int n, m, count = 0, retval = 0;
DECLARE_WAITQUEUE(wait, current);
- const unsigned minor = iminor(file->f_dentry->d_inode);
+ const unsigned minor = iminor(file_inode(file));
struct comedi_file_info *info = comedi_file_info_from_minor(minor);
struct comedi_device *dev = comedi_dev_from_file_info(info);
@@ -2133,7 +2133,7 @@
static int comedi_fasync(int fd, struct file *file, int on)
{
- const unsigned minor = iminor(file->f_dentry->d_inode);
+ const unsigned minor = iminor(file_inode(file));
struct comedi_device *dev = comedi_dev_from_minor(minor);
if (!dev)
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index fd47363..05400ac 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -960,11 +960,10 @@
loff_t *ppos)
{
int i;
- struct inode *inode = file->f_path.dentry->d_inode;
struct tty_struct *tty = file_tty(file);
struct tty_ldisc *ld;
- if (tty_paranoia_check(tty, inode, "tty_read"))
+ if (tty_paranoia_check(tty, file_inode(file), "tty_read"))
return -EIO;
if (!tty || (test_bit(TTY_IO_ERROR, &tty->flags)))
return -EIO;
@@ -1132,12 +1131,11 @@
static ssize_t tty_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
- struct inode *inode = file->f_path.dentry->d_inode;
struct tty_struct *tty = file_tty(file);
struct tty_ldisc *ld;
ssize_t ret;
- if (tty_paranoia_check(tty, inode, "tty_write"))
+ if (tty_paranoia_check(tty, file_inode(file), "tty_write"))
return -EIO;
if (!tty || !tty->ops->write ||
(test_bit(TTY_IO_ERROR, &tty->flags)))
@@ -2047,7 +2045,7 @@
struct tty_ldisc *ld;
int ret = 0;
- if (tty_paranoia_check(tty, filp->f_path.dentry->d_inode, "tty_poll"))
+ if (tty_paranoia_check(tty, file_inode(filp), "tty_poll"))
return 0;
ld = tty_ldisc_ref_wait(tty);
@@ -2063,7 +2061,7 @@
unsigned long flags;
int retval = 0;
- if (tty_paranoia_check(tty, filp->f_path.dentry->d_inode, "tty_fasync"))
+ if (tty_paranoia_check(tty, file_inode(filp), "tty_fasync"))
goto out;
retval = fasync_helper(fd, filp, on, &tty->fasync);
@@ -2637,9 +2635,8 @@
void __user *p = (void __user *)arg;
int retval;
struct tty_ldisc *ld;
- struct inode *inode = file->f_dentry->d_inode;
- if (tty_paranoia_check(tty, inode, "tty_ioctl"))
+ if (tty_paranoia_check(tty, file_inode(file), "tty_ioctl"))
return -EINVAL;
real_tty = tty_pair_get_tty(tty);
@@ -2780,12 +2777,11 @@
static long tty_compat_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
- struct inode *inode = file->f_dentry->d_inode;
struct tty_struct *tty = file_tty(file);
struct tty_ldisc *ld;
int retval = -ENOIOCTLCMD;
- if (tty_paranoia_check(tty, inode, "tty_ioctl"))
+ if (tty_paranoia_check(tty, file_inode(file), "tty_ioctl"))
return -EINVAL;
if (tty->ops->compat_ioctl) {
diff --git a/fs/9p/fid.c b/fs/9p/fid.c
index afd4724..d51ec9f 100644
--- a/fs/9p/fid.c
+++ b/fs/9p/fid.c
@@ -41,29 +41,16 @@
*
*/
-int v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid)
+static inline void __add_fid(struct dentry *dentry, struct p9_fid *fid)
{
- struct v9fs_dentry *dent;
+ hlist_add_head(&fid->dlist, (struct hlist_head *)&dentry->d_fsdata);
+}
- p9_debug(P9_DEBUG_VFS, "fid %d dentry %s\n",
- fid->fid, dentry->d_name.name);
-
- dent = dentry->d_fsdata;
- if (!dent) {
- dent = kmalloc(sizeof(struct v9fs_dentry), GFP_KERNEL);
- if (!dent)
- return -ENOMEM;
-
- spin_lock_init(&dent->lock);
- INIT_LIST_HEAD(&dent->fidlist);
- dentry->d_fsdata = dent;
- }
-
- spin_lock(&dent->lock);
- list_add(&fid->dlist, &dent->fidlist);
- spin_unlock(&dent->lock);
-
- return 0;
+void v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid)
+{
+ spin_lock(&dentry->d_lock);
+ __add_fid(dentry, fid);
+ spin_unlock(&dentry->d_lock);
}
/**
@@ -76,23 +63,23 @@
static struct p9_fid *v9fs_fid_find(struct dentry *dentry, kuid_t uid, int any)
{
- struct v9fs_dentry *dent;
struct p9_fid *fid, *ret;
p9_debug(P9_DEBUG_VFS, " dentry: %s (%p) uid %d any %d\n",
dentry->d_name.name, dentry, from_kuid(&init_user_ns, uid),
any);
- dent = (struct v9fs_dentry *) dentry->d_fsdata;
ret = NULL;
- if (dent) {
- spin_lock(&dent->lock);
- list_for_each_entry(fid, &dent->fidlist, dlist) {
+ /* we'll recheck under lock if there's anything to look in */
+ if (dentry->d_fsdata) {
+ struct hlist_head *h = (struct hlist_head *)&dentry->d_fsdata;
+ spin_lock(&dentry->d_lock);
+ hlist_for_each_entry(fid, h, dlist) {
if (any || uid_eq(fid->uid, uid)) {
ret = fid;
break;
}
}
- spin_unlock(&dent->lock);
+ spin_unlock(&dentry->d_lock);
}
return ret;
@@ -215,8 +202,17 @@
}
kfree(wnames);
fid_out:
- if (!IS_ERR(fid))
- v9fs_fid_add(dentry, fid);
+ if (!IS_ERR(fid)) {
+ spin_lock(&dentry->d_lock);
+ if (d_unhashed(dentry)) {
+ spin_unlock(&dentry->d_lock);
+ p9_client_clunk(fid);
+ fid = ERR_PTR(-ENOENT);
+ } else {
+ __add_fid(dentry, fid);
+ spin_unlock(&dentry->d_lock);
+ }
+ }
err_out:
up_read(&v9ses->rename_sem);
return fid;
diff --git a/fs/9p/fid.h b/fs/9p/fid.h
index bb0b6e7..2b6787f 100644
--- a/fs/9p/fid.h
+++ b/fs/9p/fid.h
@@ -23,28 +23,8 @@
#define FS_9P_FID_H
#include <linux/list.h>
-/**
- * struct v9fs_dentry - 9p private data stored in dentry d_fsdata
- * @lock: protects the fidlist
- * @fidlist: list of FIDs currently associated with this dentry
- *
- * This structure defines the 9p private data associated with
- * a particular dentry. In particular, this private data is used
- * to lookup which 9P FID handle should be used for a particular VFS
- * operation. FID handles are associated with dentries instead of
- * inodes in order to more closely map functionality to the Plan 9
- * expected behavior for FID reclaimation and tracking.
- *
- * See Also: Mapping FIDs to Linux VFS model in
- * Design and Implementation of the Linux 9P File System documentation
- */
-struct v9fs_dentry {
- spinlock_t lock; /* protect fidlist */
- struct list_head fidlist;
-};
-
struct p9_fid *v9fs_fid_lookup(struct dentry *dentry);
struct p9_fid *v9fs_fid_clone(struct dentry *dentry);
-int v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid);
+void v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid);
struct p9_fid *v9fs_writeback_fid(struct dentry *dentry);
#endif
diff --git a/fs/9p/vfs_dentry.c b/fs/9p/vfs_dentry.c
index 9ad6862..f039b10 100644
--- a/fs/9p/vfs_dentry.c
+++ b/fs/9p/vfs_dentry.c
@@ -83,21 +83,12 @@
static void v9fs_dentry_release(struct dentry *dentry)
{
- struct v9fs_dentry *dent;
- struct p9_fid *temp, *current_fid;
-
+ struct hlist_node *p, *n;
p9_debug(P9_DEBUG_VFS, " dentry: %s (%p)\n",
dentry->d_name.name, dentry);
- dent = dentry->d_fsdata;
- if (dent) {
- list_for_each_entry_safe(current_fid, temp, &dent->fidlist,
- dlist) {
- p9_client_clunk(current_fid);
- }
-
- kfree(dent);
- dentry->d_fsdata = NULL;
- }
+ hlist_for_each_safe(p, n, (struct hlist_head *)&dentry->d_fsdata)
+ p9_client_clunk(hlist_entry(p, struct p9_fid, dlist));
+ dentry->d_fsdata = NULL;
}
static int v9fs_lookup_revalidate(struct dentry *dentry, unsigned int flags)
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index b5340c8..d86edc8 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -692,9 +692,7 @@
"inode creation failed %d\n", err);
goto error;
}
- err = v9fs_fid_add(dentry, fid);
- if (err < 0)
- goto error;
+ v9fs_fid_add(dentry, fid);
d_instantiate(dentry, inode);
}
return ofid;
@@ -790,7 +788,6 @@
struct p9_fid *dfid, *fid;
struct inode *inode;
char *name;
- int result = 0;
p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p flags: %x\n",
dir, dentry->d_name.name, dentry, flags);
@@ -808,13 +805,11 @@
name = (char *) dentry->d_name.name;
fid = p9_client_walk(dfid, 1, &name, 1);
if (IS_ERR(fid)) {
- result = PTR_ERR(fid);
- if (result == -ENOENT) {
- inode = NULL;
- goto inst_out;
+ if (fid == ERR_PTR(-ENOENT)) {
+ d_add(dentry, NULL);
+ return NULL;
}
-
- return ERR_PTR(result);
+ return ERR_CAST(fid);
}
/*
* Make sure we don't use a wrong inode due to parallel
@@ -826,14 +821,9 @@
else
inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
if (IS_ERR(inode)) {
- result = PTR_ERR(inode);
- inode = NULL;
- goto error;
+ p9_client_clunk(fid);
+ return ERR_CAST(inode);
}
- result = v9fs_fid_add(dentry, fid);
- if (result < 0)
- goto error_iput;
-inst_out:
/*
* If we had a rename on the server and a parallel lookup
* for the new name, then make sure we instantiate with
@@ -842,15 +832,13 @@
* k/b.
*/
res = d_materialise_unique(dentry, inode);
- if (!IS_ERR(res))
- return res;
- result = PTR_ERR(res);
-error_iput:
- iput(inode);
-error:
- p9_client_clunk(fid);
-
- return ERR_PTR(result);
+ if (!res)
+ v9fs_fid_add(dentry, fid);
+ else if (!IS_ERR(res))
+ v9fs_fid_add(res, fid);
+ else
+ p9_client_clunk(fid);
+ return res;
}
static int
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index 61e4fa7..53687bb 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -333,9 +333,7 @@
/* Now set the ACL based on the default value */
v9fs_set_create_acl(inode, fid, dacl, pacl);
- err = v9fs_fid_add(dentry, fid);
- if (err < 0)
- goto error;
+ v9fs_fid_add(dentry, fid);
d_instantiate(dentry, inode);
v9inode = V9FS_I(inode);
@@ -453,12 +451,11 @@
err);
goto error;
}
- err = v9fs_fid_add(dentry, fid);
- if (err < 0)
- goto error;
+ v9fs_fid_add(dentry, fid);
v9fs_set_create_acl(inode, fid, dacl, pacl);
d_instantiate(dentry, inode);
fid = NULL;
+ err = 0;
} else {
/*
* Not in cached mode. No need to populate
@@ -747,11 +744,10 @@
err);
goto error;
}
- err = v9fs_fid_add(dentry, fid);
- if (err < 0)
- goto error;
+ v9fs_fid_add(dentry, fid);
d_instantiate(dentry, inode);
fid = NULL;
+ err = 0;
} else {
/* Not in cached mode. No need to populate inode with stat */
inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
@@ -900,11 +896,10 @@
goto error;
}
v9fs_set_create_acl(inode, fid, dacl, pacl);
- err = v9fs_fid_add(dentry, fid);
- if (err < 0)
- goto error;
+ v9fs_fid_add(dentry, fid);
d_instantiate(dentry, inode);
fid = NULL;
+ err = 0;
} else {
/*
* Not in cached mode. No need to populate inode with stat.
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index c541ab8..b505a14 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -1606,7 +1606,7 @@
int ext4_ind_punch_hole(struct file *file, loff_t offset, loff_t length)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
struct super_block *sb = inode->i_sb;
ext4_lblk_t first_block, stop_block;
struct address_space *mapping = inode->i_mapping;
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index b7a053d..958a46d 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -29,7 +29,7 @@
struct vm_fault *vmf)
{
struct page *page = vmf->page;
- struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(vma->vm_file);
struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
block_t old_blk_addr;
struct dnode_of_data dn;
@@ -544,7 +544,7 @@
static long f2fs_fallocate(struct file *file, int mode,
loff_t offset, loff_t len)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
long ret;
if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
@@ -577,7 +577,7 @@
long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
- struct inode *inode = filp->f_dentry->d_inode;
+ struct inode *inode = file_inode(filp);
struct f2fs_inode_info *fi = F2FS_I(inode);
unsigned int flags;
int ret;
diff --git a/fs/file_table.c b/fs/file_table.c
index aa07d36..cd4d87a 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -176,6 +176,7 @@
return file;
file->f_path = *path;
+ file->f_inode = path->dentry->d_inode;
file->f_mapping = path->dentry->d_inode->i_mapping;
file->f_mode = mode;
file->f_op = fop;
@@ -258,6 +259,7 @@
drop_file_write_access(file);
file->f_path.dentry = NULL;
file->f_path.mnt = NULL;
+ file->f_inode = NULL;
file_free(file);
dput(dentry);
mntput(mnt);
diff --git a/fs/fs_struct.c b/fs/fs_struct.c
index fe6ca58..d8ac61d 100644
--- a/fs/fs_struct.c
+++ b/fs/fs_struct.c
@@ -10,7 +10,7 @@
* Replace the fs->{rootmnt,root} with {mnt,dentry}. Put the old values.
* It can block.
*/
-void set_fs_root(struct fs_struct *fs, struct path *path)
+void set_fs_root(struct fs_struct *fs, const struct path *path)
{
struct path old_root;
@@ -29,7 +29,7 @@
* Replace the fs->{pwdmnt,pwd} with {mnt,dentry}. Put the old values.
* It can block.
*/
-void set_fs_pwd(struct fs_struct *fs, struct path *path)
+void set_fs_pwd(struct fs_struct *fs, const struct path *path)
{
struct path old_pwd;
@@ -53,7 +53,7 @@
return 1;
}
-void chroot_fs_refs(struct path *old_root, struct path *new_root)
+void chroot_fs_refs(const struct path *old_root, const struct path *new_root)
{
struct task_struct *g, *p;
struct fs_struct *fs;
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index e9bdec0..11dfa0c 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -532,7 +532,7 @@
void fuse_force_forget(struct file *file, u64 nodeid)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_req *req;
struct fuse_forget_in inarg;
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index c807176..34b80ba 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -355,7 +355,7 @@
static int fuse_flush(struct file *file, fl_owner_t id)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_file *ff = file->private_data;
struct fuse_req *req;
@@ -1215,7 +1215,7 @@
unsigned long nr_segs, loff_t *ppos)
{
ssize_t res;
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
if (is_bad_inode(inode))
return -EIO;
@@ -1238,7 +1238,7 @@
static ssize_t __fuse_direct_write(struct file *file, const struct iovec *iov,
unsigned long nr_segs, loff_t *ppos)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
size_t count = iov_length(iov, nr_segs);
ssize_t res;
@@ -1258,7 +1258,7 @@
size_t count, loff_t *ppos)
{
struct iovec iov = { .iov_base = (void __user *)buf, .iov_len = count };
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
ssize_t res;
if (is_bad_inode(inode))
@@ -1485,7 +1485,7 @@
static int fuse_file_mmap(struct file *file, struct vm_area_struct *vma)
{
if ((vma->vm_flags & VM_SHARED) && (vma->vm_flags & VM_MAYWRITE)) {
- struct inode *inode = file->f_dentry->d_inode;
+ struct inode *inode = file_inode(file);
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_inode *fi = get_fuse_inode(inode);
struct fuse_file *ff = file->private_data;
@@ -1543,7 +1543,7 @@
const struct file_lock *fl, int opcode, pid_t pid,
int flock)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_file *ff = file->private_data;
struct fuse_lk_in *arg = &req->misc.lk_in;
@@ -1565,7 +1565,7 @@
static int fuse_getlk(struct file *file, struct file_lock *fl)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_req *req;
struct fuse_lk_out outarg;
@@ -1590,7 +1590,7 @@
static int fuse_setlk(struct file *file, struct file_lock *fl, int flock)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_req *req;
int opcode = (fl->fl_flags & FL_SLEEP) ? FUSE_SETLKW : FUSE_SETLK;
@@ -1622,7 +1622,7 @@
static int fuse_file_lock(struct file *file, int cmd, struct file_lock *fl)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
struct fuse_conn *fc = get_fuse_conn(inode);
int err;
@@ -1645,7 +1645,7 @@
static int fuse_file_flock(struct file *file, int cmd, struct file_lock *fl)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
struct fuse_conn *fc = get_fuse_conn(inode);
int err;
@@ -1702,7 +1702,7 @@
static loff_t fuse_file_llseek(struct file *file, loff_t offset, int whence)
{
loff_t retval;
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
/* No i_mutex protection necessary for SEEK_CUR and SEEK_SET */
if (whence == SEEK_CUR || whence == SEEK_SET)
@@ -2079,7 +2079,7 @@
long fuse_ioctl_common(struct file *file, unsigned int cmd,
unsigned long arg, unsigned int flags)
{
- struct inode *inode = file->f_dentry->d_inode;
+ struct inode *inode = file_inode(file);
struct fuse_conn *fc = get_fuse_conn(inode);
if (!fuse_allow_current_process(fc))
diff --git a/fs/internal.h b/fs/internal.h
index 2f6af7f..507141f 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -69,7 +69,7 @@
/*
* fs_struct.c
*/
-extern void chroot_fs_refs(struct path *, struct path *);
+extern void chroot_fs_refs(const struct path *, const struct path *);
/*
* file_table.c
diff --git a/fs/namei.c b/fs/namei.c
index dc984fe..961bc12 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -451,7 +451,7 @@
*
* Given a path increment the reference count to the dentry and the vfsmount.
*/
-void path_get(struct path *path)
+void path_get(const struct path *path)
{
mntget(path->mnt);
dget(path->dentry);
@@ -464,7 +464,7 @@
*
* Given a path decrement the reference count to the dentry and the vfsmount.
*/
-void path_put(struct path *path)
+void path_put(const struct path *path)
{
dput(path->dentry);
mntput(path->mnt);
diff --git a/fs/open.c b/fs/open.c
index e3441f5..6835446 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -704,7 +704,7 @@
f->f_mode = FMODE_PATH;
path_get(&f->f_path);
- inode = file_inode(f);
+ inode = f->f_inode = f->f_path.dentry->d_inode;
if (f->f_mode & FMODE_WRITE) {
error = __get_file_write_access(inode, f->f_path.mnt);
if (error)
@@ -767,6 +767,7 @@
path_put(&f->f_path);
f->f_path.mnt = NULL;
f->f_path.dentry = NULL;
+ f->f_inode = NULL;
return error;
}
diff --git a/fs/seq_file.c b/fs/seq_file.c
index 15c6304..38bb59f 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -339,7 +339,7 @@
/**
* seq_release - free the structures associated with sequential file.
* @file: file in question
- * @inode: file->f_path.dentry->d_inode
+ * @inode: its inode
*
* Frees the structures associated with sequential file; can be used
* as ->f_op->release() if you don't have private data to destroy.
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 4e686a0..74a907b 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -769,6 +769,7 @@
} f_u;
struct path f_path;
#define f_dentry f_path.dentry
+ struct inode *f_inode; /* cached value */
const struct file_operations *f_op;
/*
@@ -2217,7 +2218,7 @@
static inline struct inode *file_inode(struct file *f)
{
- return f->f_path.dentry->d_inode;
+ return f->f_inode;
}
/*
diff --git a/include/linux/fs_struct.h b/include/linux/fs_struct.h
index d0ae3a8..729eded 100644
--- a/include/linux/fs_struct.h
+++ b/include/linux/fs_struct.h
@@ -17,8 +17,8 @@
extern struct kmem_cache *fs_cachep;
extern void exit_fs(struct task_struct *);
-extern void set_fs_root(struct fs_struct *, struct path *);
-extern void set_fs_pwd(struct fs_struct *, struct path *);
+extern void set_fs_root(struct fs_struct *, const struct path *);
+extern void set_fs_pwd(struct fs_struct *, const struct path *);
extern struct fs_struct *copy_fs_struct(struct fs_struct *);
extern void free_fs_struct(struct fs_struct *);
extern int unshare_fs_struct(void);
diff --git a/include/linux/path.h b/include/linux/path.h
index edc98de..d137218 100644
--- a/include/linux/path.h
+++ b/include/linux/path.h
@@ -9,8 +9,8 @@
struct dentry *dentry;
};
-extern void path_get(struct path *);
-extern void path_put(struct path *);
+extern void path_get(const struct path *);
+extern void path_put(const struct path *);
static inline int path_equal(const struct path *path1, const struct path *path2)
{
diff --git a/include/net/9p/client.h b/include/net/9p/client.h
index 5ff70f4..4c7c01a 100644
--- a/include/net/9p/client.h
+++ b/include/net/9p/client.h
@@ -192,7 +192,7 @@
void *rdir;
struct list_head flist;
- struct list_head dlist; /* list of all fids attached to a dentry */
+ struct hlist_node dlist; /* list of all fids attached to a dentry */
};
/**
diff --git a/kernel/futex.c b/kernel/futex.c
index fbc07a2..f0090a9 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -226,7 +226,7 @@
* Returns a negative error code or 0
* The key words are stored in *key on success.
*
- * For shared mappings, it's (page->index, vma->vm_file->f_path.dentry->d_inode,
+ * For shared mappings, it's (page->index, file_inode(vma->vm_file),
* offset_within_page). For private mappings, it's (uaddr, current->mm).
* We can usually work out the index without swapping in the page.
*
diff --git a/mm/shmem.c b/mm/shmem.c
index ed2befb..1c44af7 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2932,9 +2932,8 @@
inode->i_size = size;
clear_nlink(inode); /* It is unlinked */
#ifndef CONFIG_MMU
- error = ramfs_nommu_expand_for_mapping(inode, size);
- res = ERR_PTR(error);
- if (error)
+ res = ERR_PTR(ramfs_nommu_expand_for_mapping(inode, size));
+ if (IS_ERR(res))
goto put_dentry;
#endif
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 84b59171..2fa28c8 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -3135,11 +3135,6 @@
switch (cmd) {
case F_SETFL:
- if (!file->f_path.dentry || !file->f_path.dentry->d_inode) {
- err = -EINVAL;
- break;
- }
-
if ((file->f_flags & O_APPEND) && !(arg & O_APPEND)) {
err = file_has_perm(cred, file, FILE__WRITE);
break;
@@ -3162,10 +3157,6 @@
case F_SETLK64:
case F_SETLKW64:
#endif
- if (!file->f_path.dentry || !file->f_path.dentry->d_inode) {
- err = -EINVAL;
- break;
- }
err = file_has_perm(cred, file, FILE__LOCK);
break;
}