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Diffstat (limited to 'fs/coda/inode.c')
-rw-r--r--fs/coda/inode.c109
1 files changed, 61 insertions, 48 deletions
diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index 5ea57c8c7f9..fe3afb2de88 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -20,18 +20,17 @@
#include <linux/file.h>
#include <linux/vfs.h>
#include <linux/slab.h>
+#include <linux/pid_namespace.h>
-#include <asm/system.h>
#include <asm/uaccess.h>
#include <linux/fs.h>
#include <linux/vmalloc.h>
#include <linux/coda.h>
-#include <linux/coda_linux.h>
#include <linux/coda_psdev.h>
-#include <linux/coda_fs_i.h>
-#include <linux/coda_cache.h>
+#include "coda_linux.h"
+#include "coda_cache.h"
#include "coda_int.h"
@@ -45,22 +44,28 @@ static struct kmem_cache * coda_inode_cachep;
static struct inode *coda_alloc_inode(struct super_block *sb)
{
struct coda_inode_info *ei;
- ei = (struct coda_inode_info *)kmem_cache_alloc(coda_inode_cachep, GFP_KERNEL);
+ ei = kmem_cache_alloc(coda_inode_cachep, GFP_KERNEL);
if (!ei)
return NULL;
memset(&ei->c_fid, 0, sizeof(struct CodaFid));
ei->c_flags = 0;
- ei->c_uid = 0;
+ ei->c_uid = GLOBAL_ROOT_UID;
ei->c_cached_perm = 0;
spin_lock_init(&ei->c_lock);
return &ei->vfs_inode;
}
-static void coda_destroy_inode(struct inode *inode)
+static void coda_i_callback(struct rcu_head *head)
{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
kmem_cache_free(coda_inode_cachep, ITOC(inode));
}
+static void coda_destroy_inode(struct inode *inode)
+{
+ call_rcu(&inode->i_rcu, coda_i_callback);
+}
+
static void init_once(void *foo)
{
struct coda_inode_info *ei = (struct coda_inode_info *) foo;
@@ -68,7 +73,7 @@ static void init_once(void *foo)
inode_init_once(&ei->vfs_inode);
}
-int coda_init_inodecache(void)
+int __init coda_init_inodecache(void)
{
coda_inode_cachep = kmem_cache_create("coda_inode_cache",
sizeof(struct coda_inode_info),
@@ -81,11 +86,17 @@ int coda_init_inodecache(void)
void coda_destroy_inodecache(void)
{
+ /*
+ * Make sure all delayed rcu free inodes are flushed before we
+ * destroy cache.
+ */
+ rcu_barrier();
kmem_cache_destroy(coda_inode_cachep);
}
static int coda_remount(struct super_block *sb, int *flags, char *data)
{
+ sync_filesystem(sb);
*flags |= MS_NOATIME;
return 0;
}
@@ -103,43 +114,41 @@ static const struct super_operations coda_super_operations =
static int get_device_index(struct coda_mount_data *data)
{
- struct file *file;
+ struct fd f;
struct inode *inode;
int idx;
- if(data == NULL) {
- printk("coda_read_super: Bad mount data\n");
+ if (data == NULL) {
+ pr_warn("%s: Bad mount data\n", __func__);
return -1;
}
- if(data->version != CODA_MOUNT_VERSION) {
- printk("coda_read_super: Bad mount version\n");
+ if (data->version != CODA_MOUNT_VERSION) {
+ pr_warn("%s: Bad mount version\n", __func__);
return -1;
}
- file = fget(data->fd);
- inode = NULL;
- if(file)
- inode = file->f_path.dentry->d_inode;
-
- if(!inode || !S_ISCHR(inode->i_mode) ||
- imajor(inode) != CODA_PSDEV_MAJOR) {
- if(file)
- fput(file);
-
- printk("coda_read_super: Bad file\n");
- return -1;
+ f = fdget(data->fd);
+ if (!f.file)
+ goto Ebadf;
+ inode = file_inode(f.file);
+ if (!S_ISCHR(inode->i_mode) || imajor(inode) != CODA_PSDEV_MAJOR) {
+ fdput(f);
+ goto Ebadf;
}
idx = iminor(inode);
- fput(file);
+ fdput(f);
- if(idx < 0 || idx >= MAX_CODADEVS) {
- printk("coda_read_super: Bad minor number\n");
+ if (idx < 0 || idx >= MAX_CODADEVS) {
+ pr_warn("%s: Bad minor number\n", __func__);
return -1;
}
return idx;
+Ebadf:
+ pr_warn("%s: Bad file\n", __func__);
+ return -1;
}
static int coda_fill_super(struct super_block *sb, void *data, int silent)
@@ -150,25 +159,28 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
int error;
int idx;
+ if (task_active_pid_ns(current) != &init_pid_ns)
+ return -EINVAL;
+
idx = get_device_index((struct coda_mount_data *) data);
/* Ignore errors in data, for backward compatibility */
if(idx == -1)
idx = 0;
- printk(KERN_INFO "coda_read_super: device index: %i\n", idx);
+ pr_info("%s: device index: %i\n", __func__, idx);
vc = &coda_comms[idx];
mutex_lock(&vc->vc_mutex);
if (!vc->vc_inuse) {
- printk("coda_read_super: No pseudo device\n");
+ pr_warn("%s: No pseudo device\n", __func__);
error = -EINVAL;
goto unlock_out;
}
if (vc->vc_sb) {
- printk("coda_read_super: Device already mounted\n");
+ pr_warn("%s: Device already mounted\n", __func__);
error = -EBUSY;
goto unlock_out;
}
@@ -186,27 +198,30 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
sb->s_blocksize_bits = 12;
sb->s_magic = CODA_SUPER_MAGIC;
sb->s_op = &coda_super_operations;
+ sb->s_d_op = &coda_dentry_operations;
sb->s_bdi = &vc->bdi;
/* get root fid from Venus: this needs the root inode */
error = venus_rootfid(sb, &fid);
if ( error ) {
- printk("coda_read_super: coda_get_rootfid failed with %d\n",
- error);
+ pr_warn("%s: coda_get_rootfid failed with %d\n",
+ __func__, error);
goto error;
}
- printk("coda_read_super: rootfid is %s\n", coda_f2s(&fid));
+ pr_info("%s: rootfid is %s\n", __func__, coda_f2s(&fid));
/* make root inode */
- error = coda_cnode_make(&root, &fid, sb);
- if ( error || !root ) {
- printk("Failure of coda_cnode_make for root: error %d\n", error);
- goto error;
+ root = coda_cnode_make(&fid, sb);
+ if (IS_ERR(root)) {
+ error = PTR_ERR(root);
+ pr_warn("Failure of coda_cnode_make for root: error %d\n",
+ error);
+ goto error;
}
- 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);
+ pr_info("%s: rootinode is %ld dev %s\n",
+ __func__, root->i_ino, root->i_sb->s_id);
+ sb->s_root = d_make_root(root);
if (!sb->s_root) {
error = -EINVAL;
goto error;
@@ -214,9 +229,6 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
return 0;
error:
- if (root)
- iput(root);
-
mutex_lock(&vc->vc_mutex);
bdi_destroy(&vc->bdi);
vc->vc_sb = NULL;
@@ -235,19 +247,19 @@ static void coda_put_super(struct super_block *sb)
sb->s_fs_info = NULL;
mutex_unlock(&vcp->vc_mutex);
- printk("Coda: Bye bye.\n");
+ pr_info("Bye bye.\n");
}
static void coda_evict_inode(struct inode *inode)
{
- truncate_inode_pages(&inode->i_data, 0);
- end_writeback(inode);
+ truncate_inode_pages_final(&inode->i_data);
+ clear_inode(inode);
coda_cache_clear_inode(inode);
}
int coda_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
{
- int err = coda_revalidate_inode(dentry);
+ int err = coda_revalidate_inode(dentry->d_inode);
if (!err)
generic_fillattr(dentry->d_inode, stat);
return err;
@@ -319,4 +331,5 @@ struct file_system_type coda_fs_type = {
.kill_sb = kill_anon_super,
.fs_flags = FS_BINARY_MOUNTDATA,
};
+MODULE_ALIAS_FS("coda");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 14:10:53 +0000