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-rw-r--r--fs/coda/cache.c17
-rw-r--r--fs/coda/cnode.c19
-rw-r--r--fs/coda/dir.c157
-rw-r--r--fs/coda/file.c31
-rw-r--r--fs/coda/inode.c57
-rw-r--r--fs/coda/pioctl.c23
-rw-r--r--fs/coda/psdev.c42
-rw-r--r--fs/coda/symlink.c3
-rw-r--r--fs/coda/upcall.c89
9 files changed, 201 insertions, 237 deletions
diff --git a/fs/coda/cache.c b/fs/coda/cache.c
index a5bf5771a22a..9060f08e70cf 100644
--- a/fs/coda/cache.c
+++ b/fs/coda/cache.c
@@ -17,6 +17,7 @@
#include <linux/string.h>
#include <linux/list.h>
#include <linux/sched.h>
+#include <linux/spinlock.h>
#include <linux/coda.h>
#include <linux/coda_linux.h>
@@ -31,19 +32,23 @@ void coda_cache_enter(struct inode *inode, int mask)
{
struct coda_inode_info *cii = ITOC(inode);
+ spin_lock(&cii->c_lock);
cii->c_cached_epoch = atomic_read(&permission_epoch);
if (cii->c_uid != current_fsuid()) {
cii->c_uid = current_fsuid();
cii->c_cached_perm = mask;
} else
cii->c_cached_perm |= mask;
+ spin_unlock(&cii->c_lock);
}
/* remove cached acl from an inode */
void coda_cache_clear_inode(struct inode *inode)
{
struct coda_inode_info *cii = ITOC(inode);
+ spin_lock(&cii->c_lock);
cii->c_cached_epoch = atomic_read(&permission_epoch) - 1;
+ spin_unlock(&cii->c_lock);
}
/* remove all acl caches */
@@ -57,13 +62,15 @@ void coda_cache_clear_all(struct super_block *sb)
int coda_cache_check(struct inode *inode, int mask)
{
struct coda_inode_info *cii = ITOC(inode);
- int hit;
+ int hit;
- hit = (mask & cii->c_cached_perm) == mask &&
- cii->c_uid == current_fsuid() &&
- cii->c_cached_epoch == atomic_read(&permission_epoch);
+ spin_lock(&cii->c_lock);
+ hit = (mask & cii->c_cached_perm) == mask &&
+ cii->c_uid == current_fsuid() &&
+ cii->c_cached_epoch == atomic_read(&permission_epoch);
+ spin_unlock(&cii->c_lock);
- return hit;
+ return hit;
}
diff --git a/fs/coda/cnode.c b/fs/coda/cnode.c
index a7a780929eec..602240569c89 100644
--- a/fs/coda/cnode.c
+++ b/fs/coda/cnode.c
@@ -45,13 +45,15 @@ static void coda_fill_inode(struct inode *inode, struct coda_vattr *attr)
static int coda_test_inode(struct inode *inode, void *data)
{
struct CodaFid *fid = (struct CodaFid *)data;
- return coda_fideq(&(ITOC(inode)->c_fid), fid);
+ struct coda_inode_info *cii = ITOC(inode);
+ return coda_fideq(&cii->c_fid, fid);
}
static int coda_set_inode(struct inode *inode, void *data)
{
struct CodaFid *fid = (struct CodaFid *)data;
- ITOC(inode)->c_fid = *fid;
+ struct coda_inode_info *cii = ITOC(inode);
+ cii->c_fid = *fid;
return 0;
}
@@ -71,6 +73,7 @@ struct inode * coda_iget(struct super_block * sb, struct CodaFid * fid,
cii = ITOC(inode);
/* we still need to set i_ino for things like stat(2) */
inode->i_ino = hash;
+ /* inode is locked and unique, no need to grab cii->c_lock */
cii->c_mapcount = 0;
unlock_new_inode(inode);
}
@@ -107,14 +110,20 @@ int coda_cnode_make(struct inode **inode, struct CodaFid *fid, struct super_bloc
}
+/* Although we treat Coda file identifiers as immutable, there is one
+ * special case for files created during a disconnection where they may
+ * not be globally unique. When an identifier collision is detected we
+ * first try to flush the cached inode from the kernel and finally
+ * resort to renaming/rehashing in-place. Userspace remembers both old
+ * and new values of the identifier to handle any in-flight upcalls.
+ * The real solution is to use globally unique UUIDs as identifiers, but
+ * retrofitting the existing userspace code for this is non-trivial. */
void coda_replace_fid(struct inode *inode, struct CodaFid *oldfid,
struct CodaFid *newfid)
{
- struct coda_inode_info *cii;
+ struct coda_inode_info *cii = ITOC(inode);
unsigned long hash = coda_f2i(newfid);
- cii = ITOC(inode);
-
BUG_ON(!coda_fideq(&cii->c_fid, oldfid));
/* replace fid and rehash inode */
diff --git a/fs/coda/dir.c b/fs/coda/dir.c
index ccd98b0f2b0b..5d8b35539601 100644
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@@ -17,7 +17,7 @@
#include <linux/stat.h>
#include <linux/errno.h>
#include <linux/string.h>
-#include <linux/smp_lock.h>
+#include <linux/spinlock.h>
#include <asm/uaccess.h>
@@ -116,15 +116,11 @@ static struct dentry *coda_lookup(struct inode *dir, struct dentry *entry, struc
goto exit;
}
- lock_kernel();
-
error = venus_lookup(dir->i_sb, coda_i2f(dir), name, length,
&type, &resfid);
if (!error)
error = coda_cnode_make(&inode, &resfid, dir->i_sb);
- unlock_kernel();
-
if (error && error != -ENOENT)
return ERR_PTR(error);
@@ -140,28 +136,24 @@ exit:
int coda_permission(struct inode *inode, int mask)
{
- int error = 0;
+ int error;
mask &= MAY_READ | MAY_WRITE | MAY_EXEC;
if (!mask)
- return 0;
+ return 0;
if ((mask & MAY_EXEC) && !execute_ok(inode))
return -EACCES;
- lock_kernel();
-
if (coda_cache_check(inode, mask))
- goto out;
+ return 0;
- error = venus_access(inode->i_sb, coda_i2f(inode), mask);
+ error = venus_access(inode->i_sb, coda_i2f(inode), mask);
if (!error)
coda_cache_enter(inode, mask);
- out:
- unlock_kernel();
return error;
}
@@ -200,41 +192,34 @@ static inline void coda_dir_drop_nlink(struct inode *dir)
/* creation routines: create, mknod, mkdir, link, symlink */
static int coda_create(struct inode *dir, struct dentry *de, int mode, struct nameidata *nd)
{
- int error=0;
+ int error;
const char *name=de->d_name.name;
int length=de->d_name.len;
struct inode *inode;
struct CodaFid newfid;
struct coda_vattr attrs;
- lock_kernel();
-
- if (coda_isroot(dir) && coda_iscontrol(name, length)) {
- unlock_kernel();
+ if (coda_isroot(dir) && coda_iscontrol(name, length))
return -EPERM;
- }
error = venus_create(dir->i_sb, coda_i2f(dir), name, length,
0, mode, &newfid, &attrs);
-
- if ( error ) {
- unlock_kernel();
- d_drop(de);
- return error;
- }
+ if (error)
+ goto err_out;
inode = coda_iget(dir->i_sb, &newfid, &attrs);
- if ( IS_ERR(inode) ) {
- unlock_kernel();
- d_drop(de);
- return PTR_ERR(inode);
+ if (IS_ERR(inode)) {
+ error = PTR_ERR(inode);
+ goto err_out;
}
/* invalidate the directory cnode's attributes */
coda_dir_update_mtime(dir);
- unlock_kernel();
d_instantiate(de, inode);
return 0;
+err_out:
+ d_drop(de);
+ return error;
}
static int coda_mkdir(struct inode *dir, struct dentry *de, int mode)
@@ -246,36 +231,29 @@ static int coda_mkdir(struct inode *dir, struct dentry *de, int mode)
int error;
struct CodaFid newfid;
- lock_kernel();
-
- if (coda_isroot(dir) && coda_iscontrol(name, len)) {
- unlock_kernel();
+ if (coda_isroot(dir) && coda_iscontrol(name, len))
return -EPERM;
- }
attrs.va_mode = mode;
error = venus_mkdir(dir->i_sb, coda_i2f(dir),
name, len, &newfid, &attrs);
-
- if ( error ) {
- unlock_kernel();
- d_drop(de);
- return error;
- }
+ if (error)
+ goto err_out;
inode = coda_iget(dir->i_sb, &newfid, &attrs);
- if ( IS_ERR(inode) ) {
- unlock_kernel();
- d_drop(de);
- return PTR_ERR(inode);
+ if (IS_ERR(inode)) {
+ error = PTR_ERR(inode);
+ goto err_out;
}
/* invalidate the directory cnode's attributes */
coda_dir_inc_nlink(dir);
coda_dir_update_mtime(dir);
- unlock_kernel();
d_instantiate(de, inode);
return 0;
+err_out:
+ d_drop(de);
+ return error;
}
/* try to make de an entry in dir_inodde linked to source_de */
@@ -287,52 +265,38 @@ static int coda_link(struct dentry *source_de, struct inode *dir_inode,
int len = de->d_name.len;
int error;
- lock_kernel();
-
- if (coda_isroot(dir_inode) && coda_iscontrol(name, len)) {
- unlock_kernel();
+ if (coda_isroot(dir_inode) && coda_iscontrol(name, len))
return -EPERM;
- }
error = venus_link(dir_inode->i_sb, coda_i2f(inode),
coda_i2f(dir_inode), (const char *)name, len);
-
if (error) {
d_drop(de);
- goto out;
+ return error;
}
coda_dir_update_mtime(dir_inode);
- atomic_inc(&inode->i_count);
+ ihold(inode);
d_instantiate(de, inode);
inc_nlink(inode);
-
-out:
- unlock_kernel();
- return(error);
+ return 0;
}
static int coda_symlink(struct inode *dir_inode, struct dentry *de,
const char *symname)
{
- const char *name = de->d_name.name;
+ const char *name = de->d_name.name;
int len = de->d_name.len;
int symlen;
- int error = 0;
-
- lock_kernel();
+ int error;
- if (coda_isroot(dir_inode) && coda_iscontrol(name, len)) {
- unlock_kernel();
+ if (coda_isroot(dir_inode) && coda_iscontrol(name, len))
return -EPERM;
- }
symlen = strlen(symname);
- if ( symlen > CODA_MAXPATHLEN ) {
- unlock_kernel();
+ if (symlen > CODA_MAXPATHLEN)
return -ENAMETOOLONG;
- }
/*
* This entry is now negative. Since we do not create
@@ -343,10 +307,9 @@ static int coda_symlink(struct inode *dir_inode, struct dentry *de,
symname, symlen);
/* mtime is no good anymore */
- if ( !error )
+ if (!error)
coda_dir_update_mtime(dir_inode);
- unlock_kernel();
return error;
}
@@ -357,17 +320,12 @@ static int coda_unlink(struct inode *dir, struct dentry *de)
const char *name = de->d_name.name;
int len = de->d_name.len;
- lock_kernel();
-
error = venus_remove(dir->i_sb, coda_i2f(dir), name, len);
- if ( error ) {
- unlock_kernel();
+ if (error)
return error;
- }
coda_dir_update_mtime(dir);
drop_nlink(de->d_inode);
- unlock_kernel();
return 0;
}
@@ -377,8 +335,6 @@ static int coda_rmdir(struct inode *dir, struct dentry *de)
int len = de->d_name.len;
int error;
- lock_kernel();
-
error = venus_rmdir(dir->i_sb, coda_i2f(dir), name, len);
if (!error) {
/* VFS may delete the child */
@@ -389,7 +345,6 @@ static int coda_rmdir(struct inode *dir, struct dentry *de)
coda_dir_drop_nlink(dir);
coda_dir_update_mtime(dir);
}
- unlock_kernel();
return error;
}
@@ -403,15 +358,12 @@ static int coda_rename(struct inode *old_dir, struct dentry *old_dentry,
int new_length = new_dentry->d_name.len;
int error;
- lock_kernel();
-
error = venus_rename(old_dir->i_sb, coda_i2f(old_dir),
coda_i2f(new_dir), old_length, new_length,
(const char *) old_name, (const char *)new_name);
-
- if ( !error ) {
- if ( new_dentry->d_inode ) {
- if ( S_ISDIR(new_dentry->d_inode->i_mode) ) {
+ if (!error) {
+ if (new_dentry->d_inode) {
+ if (S_ISDIR(new_dentry->d_inode->i_mode)) {
coda_dir_drop_nlink(old_dir);
coda_dir_inc_nlink(new_dir);
}
@@ -423,8 +375,6 @@ static int coda_rename(struct inode *old_dir, struct dentry *old_dentry,
coda_flag_inode(new_dir, C_VATTR);
}
}
- unlock_kernel();
-
return error;
}
@@ -594,10 +544,7 @@ static int coda_dentry_revalidate(struct dentry *de, struct nameidata *nd)
struct inode *inode = de->d_inode;
struct coda_inode_info *cii;
- if (!inode)
- return 1;
- lock_kernel();
- if (coda_isroot(inode))
+ if (!inode || coda_isroot(inode))
goto out;
if (is_bad_inode(inode))
goto bad;
@@ -617,13 +564,12 @@ static int coda_dentry_revalidate(struct dentry *de, struct nameidata *nd)
goto out;
/* clear the flags. */
+ spin_lock(&cii->c_lock);
cii->c_flags &= ~(C_VATTR | C_PURGE | C_FLUSH);
-
+ spin_unlock(&cii->c_lock);
bad:
- unlock_kernel();
return 0;
out:
- unlock_kernel();
return 1;
}
@@ -656,20 +602,19 @@ static int coda_dentry_delete(struct dentry * dentry)
int coda_revalidate_inode(struct dentry *dentry)
{
struct coda_vattr attr;
- int error = 0;
+ int error;
int old_mode;
ino_t old_ino;
struct inode *inode = dentry->d_inode;
struct coda_inode_info *cii = ITOC(inode);
- lock_kernel();
- if ( !cii->c_flags )
- goto ok;
+ if (!cii->c_flags)
+ return 0;
if (cii->c_flags & (C_VATTR | C_PURGE | C_FLUSH)) {
error = venus_getattr(inode->i_sb, &(cii->c_fid), &attr);
- if ( error )
- goto return_bad;
+ if (error)
+ return -EIO;
/* this inode may be lost if:
- it's ino changed
@@ -688,17 +633,13 @@ int coda_revalidate_inode(struct dentry *dentry)
/* the following can happen when a local fid is replaced
with a global one, here we lose and declare the inode bad */
if (inode->i_ino != old_ino)
- goto return_bad;
+ return -EIO;
coda_flag_inode_children(inode, C_FLUSH);
+
+ spin_lock(&cii->c_lock);
cii->c_flags &= ~(C_VATTR | C_PURGE | C_FLUSH);
+ spin_unlock(&cii->c_lock);
}
-
-ok:
- unlock_kernel();
return 0;
-
-return_bad:
- unlock_kernel();
- return -EIO;
}
diff --git a/fs/coda/file.c b/fs/coda/file.c
index ad3cd2abeeb4..c8b50ba4366a 100644
--- a/fs/coda/file.c
+++ b/fs/coda/file.c
@@ -15,7 +15,7 @@
#include <linux/stat.h>
#include <linux/cred.h>
#include <linux/errno.h>
-#include <linux/smp_lock.h>
+#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <asm/uaccess.h>
@@ -109,19 +109,24 @@ coda_file_mmap(struct file *coda_file, struct vm_area_struct *vma)
coda_inode = coda_file->f_path.dentry->d_inode;
host_inode = host_file->f_path.dentry->d_inode;
+
+ cii = ITOC(coda_inode);
+ spin_lock(&cii->c_lock);
coda_file->f_mapping = host_file->f_mapping;
if (coda_inode->i_mapping == &coda_inode->i_data)
coda_inode->i_mapping = host_inode->i_mapping;
/* only allow additional mmaps as long as userspace isn't changing
* the container file on us! */
- else if (coda_inode->i_mapping != host_inode->i_mapping)
+ else if (coda_inode->i_mapping != host_inode->i_mapping) {
+ spin_unlock(&cii->c_lock);
return -EBUSY;
+ }
/* keep track of how often the coda_inode/host_file has been mmapped */
- cii = ITOC(coda_inode);
cii->c_mapcount++;
cfi->cfi_mapcount++;
+ spin_unlock(&cii->c_lock);
return host_file->f_op->mmap(host_file, vma);
}
@@ -138,8 +143,6 @@ int coda_open(struct inode *coda_inode, struct file *coda_file)
if (!cfi)
return -ENOMEM;
- lock_kernel();
-
error = venus_open(coda_inode->i_sb, coda_i2f(coda_inode), coda_flags,
&host_file);
if (!host_file)
@@ -147,7 +150,6 @@ int coda_open(struct inode *coda_inode, struct file *coda_file)
if (error) {
kfree(cfi);
- unlock_kernel();
return error;
}
@@ -159,8 +161,6 @@ int coda_open(struct inode *coda_inode, struct file *coda_file)
BUG_ON(coda_file->private_data != NULL);
coda_file->private_data = cfi;
-
- unlock_kernel();
return 0;
}
@@ -171,9 +171,7 @@ int coda_release(struct inode *coda_inode, struct file *coda_file)
struct coda_file_info *cfi;
struct coda_inode_info *cii;
struct inode *host_inode;
- int err = 0;
-
- lock_kernel();
+ int err;
cfi = CODA_FTOC(coda_file);
BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC);
@@ -185,18 +183,18 @@ int coda_release(struct inode *coda_inode, struct file *coda_file)
cii = ITOC(coda_inode);
/* did we mmap this file? */
+ spin_lock(&cii->c_lock);
if (coda_inode->i_mapping == &host_inode->i_data) {
cii->c_mapcount -= cfi->cfi_mapcount;
if (!cii->c_mapcount)
coda_inode->i_mapping = &coda_inode->i_data;
}
+ spin_unlock(&cii->c_lock);
fput(cfi->cfi_container);
kfree(coda_file->private_data);
coda_file->private_data = NULL;
- unlock_kernel();
-
/* VFS fput ignores the return value from file_operations->release, so
* there is no use returning an error here */
return 0;
@@ -207,7 +205,7 @@ int coda_fsync(struct file *coda_file, int datasync)
struct file *host_file;
struct inode *coda_inode = coda_file->f_path.dentry->d_inode;
struct coda_file_info *cfi;
- int err = 0;
+ int err;
if (!(S_ISREG(coda_inode->i_mode) || S_ISDIR(coda_inode->i_mode) ||
S_ISLNK(coda_inode->i_mode)))
@@ -218,11 +216,8 @@ int coda_fsync(struct file *coda_file, int datasync)
host_file = cfi->cfi_container;
err = vfs_fsync(host_file, datasync);
- if ( !err && !datasync ) {
- lock_kernel();
+ if (!err && !datasync)
err = venus_fsync(coda_inode->i_sb, coda_i2f(coda_inode));
- unlock_kernel();
- }
return err;
}
diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index 6526e6f21ecf..7993b96ca348 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -15,7 +15,8 @@
#include <linux/stat.h>
#include <linux/errno.h>
#include <linux/unistd.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
#include <linux/file.h>
#include <linux/vfs.h>
#include <linux/slab.h>
@@ -51,6 +52,7 @@ static struct inode *coda_alloc_inode(struct super_block *sb)
ei->c_flags = 0;
ei->c_uid = 0;
ei->c_cached_perm = 0;
+ spin_lock_init(&ei->c_lock);
return &ei->vfs_inode;
}
@@ -143,7 +145,7 @@ static int get_device_index(struct coda_mount_data *data)
static int coda_fill_super(struct super_block *sb, void *data, int silent)
{
struct inode *root = NULL;
- struct venus_comm *vc = NULL;
+ struct venus_comm *vc;
struct CodaFid fid;
int error;
int idx;
@@ -157,21 +159,26 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
printk(KERN_INFO "coda_read_super: device index: %i\n", idx);
vc = &coda_comms[idx];
+ mutex_lock(&vc->vc_mutex);
+
if (!vc->vc_inuse) {
printk("coda_read_super: No pseudo device\n");
- return -EINVAL;
+ error = -EINVAL;
+ goto unlock_out;
}
- if ( vc->vc_sb ) {
+ if (vc->vc_sb) {
printk("coda_read_super: Device already mounted\n");
- return -EBUSY;
+ error = -EBUSY;
+ goto unlock_out;
}
error = bdi_setup_and_register(&vc->bdi, "coda", BDI_CAP_MAP_COPY);
if (error)
- goto bdi_err;
+ goto unlock_out;
vc->vc_sb = sb;
+ mutex_unlock(&vc->vc_mutex);
sb->s_fs_info = vc;
sb->s_flags |= MS_NOATIME;
@@ -200,26 +207,33 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
printk("coda_read_super: rootinode is %ld dev %s\n",
root->i_ino, root->i_sb->s_id);
sb->s_root = d_alloc_root(root);
- if (!sb->s_root)
+ if (!sb->s_root) {
+ error = -EINVAL;
goto error;
- return 0;
+ }
+ return 0;
- error:
- bdi_destroy(&vc->bdi);
- bdi_err:
+error:
if (root)
iput(root);
- if (vc)
- vc->vc_sb = NULL;
- return -EINVAL;
+ mutex_lock(&vc->vc_mutex);
+ bdi_destroy(&vc->bdi);
+ vc->vc_sb = NULL;
+ sb->s_fs_info = NULL;
+unlock_out:
+ mutex_unlock(&vc->vc_mutex);
+ return error;
}
static void coda_put_super(struct super_block *sb)
{
- bdi_destroy(&coda_vcp(sb)->bdi);
- coda_vcp(sb)->vc_sb = NULL;
+ struct venus_comm *vcp = coda_vcp(sb);
+ mutex_lock(&vcp->vc_mutex);
+ bdi_destroy(&vcp->bdi);
+ vcp->vc_sb = NULL;
sb->s_fs_info = NULL;
+ mutex_unlock(&vcp->vc_mutex);
printk("Coda: Bye bye.\n");
}
@@ -245,8 +259,6 @@ int coda_setattr(struct dentry *de, struct iattr *iattr)
struct coda_vattr vattr;
int error;
- lock_kernel();
-
memset(&vattr, 0, sizeof(vattr));
inode->i_ctime = CURRENT_TIME_SEC;
@@ -256,13 +268,10 @@ int coda_setattr(struct dentry *de, struct iattr *iattr)
/* Venus is responsible for truncating the container-file!!! */
error = venus_setattr(inode->i_sb, coda_i2f(inode), &vattr);
- if ( !error ) {
+ if (!error) {
coda_vattr_to_iattr(inode, &vattr);
coda_cache_clear_inode(inode);
}
-
- unlock_kernel();
-
return error;
}
@@ -276,12 +285,8 @@ static int coda_statfs(struct dentry *dentry, struct kstatfs *buf)
{
int error;
- lock_kernel();
-
error = venus_statfs(dentry, buf);
- unlock_kernel();
-
if (error) {
/* fake something like AFS does */
buf->f_blocks = 9000000;
diff --git a/fs/coda/pioctl.c b/fs/coda/pioctl.c
index ca25d96d45c9..2fd89b5c5c7b 100644
--- a/fs/coda/pioctl.c
+++ b/fs/coda/pioctl.c
@@ -23,8 +23,6 @@
#include <linux/coda_fs_i.h>
#include <linux/coda_psdev.h>
-#include <linux/smp_lock.h>
-
/* pioctl ops */
static int coda_ioctl_permission(struct inode *inode, int mask);
static long coda_pioctl(struct file *filp, unsigned int cmd,
@@ -39,6 +37,7 @@ const struct inode_operations coda_ioctl_inode_operations = {
const struct file_operations coda_ioctl_operations = {
.owner = THIS_MODULE,
.unlocked_ioctl = coda_pioctl,
+ .llseek = noop_llseek,
};
/* the coda pioctl inode ops */
@@ -57,13 +56,9 @@ static long coda_pioctl(struct file *filp, unsigned int cmd,
struct inode *target_inode = NULL;
struct coda_inode_info *cnp;
- lock_kernel();
-
/* get the Pioctl data arguments from user space */
- if (copy_from_user(&data, (void __user *)user_data, sizeof(data))) {
- error = -EINVAL;
- goto out;
- }
+ if (copy_from_user(&data, (void __user *)user_data, sizeof(data)))
+ return -EINVAL;
/*
* Look up the pathname. Note that the pathname is in
@@ -75,13 +70,12 @@ static long coda_pioctl(struct file *filp, unsigned int cmd,
error = user_lpath(data.path, &path);
if (error)
- goto out;
- else
- target_inode = path.dentry->d_inode;
+ return error;
+
+ target_inode = path.dentry->d_inode;
/* return if it is not a Coda inode */
if (target_inode->i_sb != inode->i_sb) {
- path_put(&path);
error = -EINVAL;
goto out;
}
@@ -90,10 +84,7 @@ static long coda_pioctl(struct file *filp, unsigned int cmd,
cnp = ITOC(target_inode);
error = venus_pioctl(inode->i_sb, &(cnp->c_fid), cmd, &data);
-
- path_put(&path);
-
out:
- unlock_kernel();
+ path_put(&path);
return error;
}
diff --git a/fs/coda/psdev.c b/fs/coda/psdev.c
index 116af7546cf0..62647a8595e4 100644
--- a/fs/coda/psdev.c
+++ b/fs/coda/psdev.c
@@ -35,7 +35,7 @@
#include <linux/poll.h>
#include <linux/init.h>
#include <linux/list.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
#include <linux/device.h>
#include <asm/io.h>
#include <asm/system.h>
@@ -67,8 +67,10 @@ static unsigned int coda_psdev_poll(struct file *file, poll_table * wait)
unsigned int mask = POLLOUT | POLLWRNORM;
poll_wait(file, &vcp->vc_waitq, wait);
+ mutex_lock(&vcp->vc_mutex);
if (!list_empty(&vcp->vc_pending))
mask |= POLLIN | POLLRDNORM;
+ mutex_unlock(&vcp->vc_mutex);
return mask;
}
@@ -108,16 +110,9 @@ static ssize_t coda_psdev_write(struct file *file, const char __user *buf,
return -EFAULT;
if (DOWNCALL(hdr.opcode)) {
- struct super_block *sb = NULL;
- union outputArgs *dcbuf;
+ union outputArgs *dcbuf;
int size = sizeof(*dcbuf);
- sb = vcp->vc_sb;
- if ( !sb ) {
- count = nbytes;
- goto out;
- }
-
if ( nbytes < sizeof(struct coda_out_hdr) ) {
printk("coda_downcall opc %d uniq %d, not enough!\n",
hdr.opcode, hdr.unique);
@@ -137,9 +132,7 @@ static ssize_t coda_psdev_write(struct file *file, const char __user *buf,
}
/* what downcall errors does Venus handle ? */
- lock_kernel();
- error = coda_downcall(hdr.opcode, dcbuf, sb);
- unlock_kernel();
+ error = coda_downcall(vcp, hdr.opcode, dcbuf);
CODA_FREE(dcbuf, nbytes);
if (error) {
@@ -152,7 +145,7 @@ static ssize_t coda_psdev_write(struct file *file, const char __user *buf,
}
/* Look for the message on the processing queue. */
- lock_kernel();
+ mutex_lock(&vcp->vc_mutex);
list_for_each(lh, &vcp->vc_processing) {
tmp = list_entry(lh, struct upc_req , uc_chain);
if (tmp->uc_unique == hdr.unique) {
@@ -161,7 +154,7 @@ static ssize_t coda_psdev_write(struct file *file, const char __user *buf,
break;
}
}
- unlock_kernel();
+ mutex_unlock(&vcp->vc_mutex);
if (!req) {
printk("psdev_write: msg (%d, %d) not found\n",
@@ -216,7 +209,7 @@ static ssize_t coda_psdev_read(struct file * file, char __user * buf,
if (nbytes == 0)
return 0;
- lock_kernel();
+ mutex_lock(&vcp->vc_mutex);
add_wait_queue(&vcp->vc_waitq, &wait);
set_current_state(TASK_INTERRUPTIBLE);
@@ -230,7 +223,9 @@ static ssize_t coda_psdev_read(struct file * file, char __user * buf,
retval = -ERESTARTSYS;
break;
}
+ mutex_unlock(&vcp->vc_mutex);
schedule();
+ mutex_lock(&vcp->vc_mutex);
}
set_current_state(TASK_RUNNING);
@@ -263,7 +258,7 @@ static ssize_t coda_psdev_read(struct file * file, char __user * buf,
CODA_FREE(req->uc_data, sizeof(struct coda_in_hdr));
kfree(req);
out:
- unlock_kernel();
+ mutex_unlock(&vcp->vc_mutex);
return (count ? count : retval);
}
@@ -276,10 +271,10 @@ static int coda_psdev_open(struct inode * inode, struct file * file)
if (idx < 0 || idx >= MAX_CODADEVS)
return -ENODEV;
- lock_kernel();
-
err = -EBUSY;
vcp = &coda_comms[idx];
+ mutex_lock(&vcp->vc_mutex);
+
if (!vcp->vc_inuse) {
vcp->vc_inuse++;
@@ -293,7 +288,7 @@ static int coda_psdev_open(struct inode * inode, struct file * file)
err = 0;
}
- unlock_kernel();
+ mutex_unlock(&vcp->vc_mutex);
return err;
}
@@ -308,7 +303,7 @@ static int coda_psdev_release(struct inode * inode, struct file * file)
return -1;
}
- lock_kernel();
+ mutex_lock(&vcp->vc_mutex);
/* Wakeup clients so they can return. */
list_for_each_entry_safe(req, tmp, &vcp->vc_pending, uc_chain) {
@@ -333,7 +328,7 @@ static int coda_psdev_release(struct inode * inode, struct file * file)
file->private_data = NULL;
vcp->vc_inuse--;
- unlock_kernel();
+ mutex_unlock(&vcp->vc_mutex);
return 0;
}
@@ -346,6 +341,7 @@ static const struct file_operations coda_psdev_fops = {
.unlocked_ioctl = coda_psdev_ioctl,
.open = coda_psdev_open,
.release = coda_psdev_release,
+ .llseek = noop_llseek,
};
static int init_coda_psdev(void)
@@ -361,9 +357,11 @@ static int init_coda_psdev(void)
err = PTR_ERR(coda_psdev_class);
goto out_chrdev;
}
- for (i = 0; i < MAX_CODADEVS; i++)
+ for (i = 0; i < MAX_CODADEVS; i++) {
+ mutex_init(&(&coda_comms[i])->vc_mutex);
device_create(coda_psdev_class, NULL,
MKDEV(CODA_PSDEV_MAJOR, i), NULL, "cfs%d", i);
+ }
coda_sysctl_init();
goto out;
diff --git a/fs/coda/symlink.c b/fs/coda/symlink.c
index 4513b7258458..af78f007a2b0 100644
--- a/fs/coda/symlink.c
+++ b/fs/coda/symlink.c
@@ -14,7 +14,6 @@
#include <linux/stat.h>
#include <linux/errno.h>
#include <linux/pagemap.h>
-#include <linux/smp_lock.h>
#include <linux/coda.h>
#include <linux/coda_linux.h>
@@ -29,11 +28,9 @@ static int coda_symlink_filler(struct file *file, struct page *page)
unsigned int len = PAGE_SIZE;
char *p = kmap(page);
- lock_kernel();
cii = ITOC(inode);
error = venus_readlink(inode->i_sb, &cii->c_fid, p, &len);
- unlock_kernel();
if (error)
goto fail;
SetPageUptodate(page);
diff --git a/fs/coda/upcall.c b/fs/coda/upcall.c
index b8893ab6f9e6..c3563cab9758 100644
--- a/fs/coda/upcall.c
+++ b/fs/coda/upcall.c
@@ -27,6 +27,7 @@
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/slab.h>
+#include <linux/mutex.h>
#include <asm/uaccess.h>
#include <linux/vmalloc.h>
#include <linux/vfs.h>
@@ -606,7 +607,8 @@ static void coda_unblock_signals(sigset_t *old)
(r)->uc_opcode != CODA_RELEASE) || \
(r)->uc_flags & CODA_REQ_READ))
-static inline void coda_waitfor_upcall(struct upc_req *req)
+static inline void coda_waitfor_upcall(struct venus_comm *vcp,
+ struct upc_req *req)
{
DECLARE_WAITQUEUE(wait, current);
unsigned long timeout = jiffies + coda_timeout * HZ;
@@ -639,10 +641,12 @@ static inline void coda_waitfor_upcall(struct upc_req *req)
break;
}
+ mutex_unlock(&vcp->vc_mutex);
if (blocked)
schedule_timeout(HZ);
else
schedule();
+ mutex_lock(&vcp->vc_mutex);
}
if (blocked)
coda_unblock_signals(&old);
@@ -667,18 +671,23 @@ static int coda_upcall(struct venus_comm *vcp,
{
union outputArgs *out;
union inputArgs *sig_inputArgs;
- struct upc_req *req, *sig_req;
- int error = 0;
+ struct upc_req *req = NULL, *sig_req;
+ int error;
+
+ mutex_lock(&vcp->vc_mutex);
if (!vcp->vc_inuse) {
printk(KERN_NOTICE "coda: Venus dead, not sending upcall\n");
- return -ENXIO;
+ error = -ENXIO;
+ goto exit;
}
/* Format the request message. */
req = kmalloc(sizeof(struct upc_req), GFP_KERNEL);
- if (!req)
- return -ENOMEM;
+ if (!req) {
+ error = -ENOMEM;
+ goto exit;
+ }
req->uc_data = (void *)buffer;
req->uc_flags = 0;
@@ -705,7 +714,7 @@ static int coda_upcall(struct venus_comm *vcp,
* ENODEV. */
/* Go to sleep. Wake up on signals only after the timeout. */
- coda_waitfor_upcall(req);
+ coda_waitfor_upcall(vcp, req);
/* Op went through, interrupt or not... */
if (req->uc_flags & CODA_REQ_WRITE) {
@@ -759,6 +768,7 @@ static int coda_upcall(struct venus_comm *vcp,
exit:
kfree(req);
+ mutex_unlock(&vcp->vc_mutex);
return error;
}
@@ -796,21 +806,24 @@ exit:
*
* CODA_REPLACE -- replace one CodaFid with another throughout the name cache */
-int coda_downcall(int opcode, union outputArgs * out, struct super_block *sb)
+int coda_downcall(struct venus_comm *vcp, int opcode, union outputArgs *out)
{
struct inode *inode = NULL;
- struct CodaFid *fid, *newfid;
+ struct CodaFid *fid = NULL, *newfid;
+ struct super_block *sb;
/* Handle invalidation requests. */
- if ( !sb || !sb->s_root)
- return 0;
+ mutex_lock(&vcp->vc_mutex);
+ sb = vcp->vc_sb;
+ if (!sb || !sb->s_root)
+ goto unlock_out;
switch (opcode) {
case CODA_FLUSH:
coda_cache_clear_all(sb);
shrink_dcache_sb(sb);
if (sb->s_root->d_inode)
- coda_flag_inode(sb->s_root->d_inode, C_FLUSH);
+ coda_flag_inode(sb->s_root->d_inode, C_FLUSH);
break;
case CODA_PURGEUSER:
@@ -819,45 +832,53 @@ int coda_downcall(int opcode, union outputArgs * out, struct super_block *sb)
case CODA_ZAPDIR:
fid = &out->coda_zapdir.CodaFid;
- inode = coda_fid_to_inode(fid, sb);
- if (inode) {
- coda_flag_inode_children(inode, C_PURGE);
- coda_flag_inode(inode, C_VATTR);
- }
break;
case CODA_ZAPFILE:
fid = &out->coda_zapfile.CodaFid;
- inode = coda_fid_to_inode(fid, sb);
- if (inode)
- coda_flag_inode(inode, C_VATTR);
break;
case CODA_PURGEFID:
fid = &out->coda_purgefid.CodaFid;
+ break;
+
+ case CODA_REPLACE:
+ fid = &out->coda_replace.OldFid;
+ break;
+ }
+ if (fid)
inode = coda_fid_to_inode(fid, sb);
- if (inode) {
- coda_flag_inode_children(inode, C_PURGE);
- /* catch the dentries later if some are still busy */
- coda_flag_inode(inode, C_PURGE);
- d_prune_aliases(inode);
+unlock_out:
+ mutex_unlock(&vcp->vc_mutex);
- }
+ if (!inode)
+ return 0;
+
+ switch (opcode) {
+ case CODA_ZAPDIR:
+ coda_flag_inode_children(inode, C_PURGE);
+ coda_flag_inode(inode, C_VATTR);
+ break;
+
+ case CODA_ZAPFILE:
+ coda_flag_inode(inode, C_VATTR);
+ break;
+
+ case CODA_PURGEFID:
+ coda_flag_inode_children(inode, C_PURGE);
+
+ /* catch the dentries later if some are still busy */
+ coda_flag_inode(inode, C_PURGE);
+ d_prune_aliases(inode);
break;
case CODA_REPLACE:
- fid = &out->coda_replace.OldFid;
newfid = &out->coda_replace.NewFid;
- inode = coda_fid_to_inode(fid, sb);
- if (inode)
- coda_replace_fid(inode, fid, newfid);
+ coda_replace_fid(inode, fid, newfid);
break;
}
-
- if (inode)
- iput(inode);
-
+ iput(inode);
return 0;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.