#include <linux/reiserfs_acl.h>
#include <asm/uaccess.h>
#include <net/checksum.h>
-#include <linux/smp_lock.h>
#include <linux/stat.h>
#include <linux/quotaops.h>
+#include <linux/security.h>
#define PRIVROOT_NAME ".reiserfs_priv"
#define XAROOT_NAME "xattrs"
BUG_ON(!mutex_is_locked(&dir->i_mutex));
vfs_dq_init(dir);
- mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_CHILD);
+ reiserfs_mutex_lock_nested_safe(&dentry->d_inode->i_mutex,
+ I_MUTEX_CHILD, dir->i_sb);
error = dir->i_op->unlink(dir, dentry);
mutex_unlock(&dentry->d_inode->i_mutex);
BUG_ON(!mutex_is_locked(&dir->i_mutex));
vfs_dq_init(dir);
- mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_CHILD);
+ reiserfs_mutex_lock_nested_safe(&dentry->d_inode->i_mutex,
+ I_MUTEX_CHILD, dir->i_sb);
dentry_unhash(dentry);
error = dir->i_op->rmdir(dir, dentry);
if (!error)
#define xattr_may_create(flags) (!flags || flags & XATTR_CREATE)
-/* Returns and possibly creates the xattr dir. */
-static struct dentry *lookup_or_create_dir(struct dentry *parent,
- const char *name, int flags)
+static struct dentry *open_xa_root(struct super_block *sb, int flags)
{
- struct dentry *dentry;
- BUG_ON(!parent);
+ struct dentry *privroot = REISERFS_SB(sb)->priv_root;
+ struct dentry *xaroot;
+ if (!privroot->d_inode)
+ return ERR_PTR(-ENODATA);
- mutex_lock_nested(&parent->d_inode->i_mutex, I_MUTEX_XATTR);
- dentry = lookup_one_len(name, parent, strlen(name));
- if (!IS_ERR(dentry) && !dentry->d_inode) {
- int err = -ENODATA;
+ mutex_lock_nested(&privroot->d_inode->i_mutex, I_MUTEX_XATTR);
+ xaroot = dget(REISERFS_SB(sb)->xattr_root);
+ if (!xaroot)
+ xaroot = ERR_PTR(-ENODATA);
+ else if (!xaroot->d_inode) {
+ int err = -ENODATA;
if (xattr_may_create(flags))
- err = xattr_mkdir(parent->d_inode, dentry, 0700);
-
+ err = xattr_mkdir(privroot->d_inode, xaroot, 0700);
if (err) {
- dput(dentry);
- dentry = ERR_PTR(err);
+ dput(xaroot);
+ xaroot = ERR_PTR(err);
}
}
- mutex_unlock(&parent->d_inode->i_mutex);
- return dentry;
-}
-static struct dentry *open_xa_root(struct super_block *sb, int flags)
-{
- struct dentry *privroot = REISERFS_SB(sb)->priv_root;
- if (!privroot)
- return ERR_PTR(-ENODATA);
- return lookup_or_create_dir(privroot, XAROOT_NAME, flags);
+ mutex_unlock(&privroot->d_inode->i_mutex);
+ return xaroot;
}
static struct dentry *open_xa_dir(const struct inode *inode, int flags)
le32_to_cpu(INODE_PKEY(inode)->k_objectid),
inode->i_generation);
- xadir = lookup_or_create_dir(xaroot, namebuf, flags);
+ mutex_lock_nested(&xaroot->d_inode->i_mutex, I_MUTEX_XATTR);
+
+ xadir = lookup_one_len(namebuf, xaroot, strlen(namebuf));
+ if (!IS_ERR(xadir) && !xadir->d_inode) {
+ int err = -ENODATA;
+ if (xattr_may_create(flags))
+ err = xattr_mkdir(xaroot->d_inode, xadir, 0700);
+ if (err) {
+ dput(xadir);
+ xadir = ERR_PTR(err);
+ }
+ }
+
+ mutex_unlock(&xaroot->d_inode->i_mutex);
dput(xaroot);
return xadir;
-
}
/* The following are side effects of other operations that aren't explicitly
if (IS_PRIVATE(inode) || get_inode_sd_version(inode) == STAT_DATA_V1)
return 0;
+ reiserfs_write_unlock(inode->i_sb);
dir = open_xa_dir(inode, XATTR_REPLACE);
if (IS_ERR(dir)) {
err = PTR_ERR(dir);
+ reiserfs_write_lock(inode->i_sb);
goto out;
} else if (!dir->d_inode) {
err = 0;
+ reiserfs_write_lock(inode->i_sb);
goto out_dir;
}
mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_XATTR);
+
+ reiserfs_write_lock(inode->i_sb);
+
buf.xadir = dir;
err = reiserfs_readdir_dentry(dir, &buf, fill_with_dentries, &pos);
while ((err == 0 || err == -ENOSPC) && buf.count) {
err = journal_begin(&th, inode->i_sb, blocks);
if (!err) {
int jerror;
- mutex_lock_nested(&dir->d_parent->d_inode->i_mutex,
- I_MUTEX_XATTR);
+ reiserfs_mutex_lock_nested_safe(
+ &dir->d_parent->d_inode->i_mutex,
+ I_MUTEX_XATTR, inode->i_sb);
err = action(dir, data);
jerror = journal_end(&th, inode->i_sb, blocks);
mutex_unlock(&dir->d_parent->d_inode->i_mutex);
}
if (dentry->d_inode) {
+ reiserfs_write_lock(inode->i_sb);
err = xattr_unlink(xadir->d_inode, dentry);
+ reiserfs_write_unlock(inode->i_sb);
update_ctime(inode);
}
if (get_inode_sd_version(inode) == STAT_DATA_V1)
return -EOPNOTSUPP;
- if (!buffer)
- return lookup_and_delete_xattr(inode, name);
+ reiserfs_write_unlock(inode->i_sb);
+
+ if (!buffer) {
+ err = lookup_and_delete_xattr(inode, name);
+ reiserfs_write_lock(inode->i_sb);
+ return err;
+ }
dentry = xattr_lookup(inode, name, flags);
- if (IS_ERR(dentry))
+ if (IS_ERR(dentry)) {
+ reiserfs_write_lock(inode->i_sb);
return PTR_ERR(dentry);
+ }
down_write(&REISERFS_I(inode)->i_xattr_sem);
+ reiserfs_write_lock(inode->i_sb);
+
xahash = xattr_hash(buffer, buffer_size);
while (buffer_pos < buffer_size || buffer_pos == 0) {
size_t chunk;
.ia_size = buffer_size,
.ia_valid = ATTR_SIZE | ATTR_CTIME,
};
+
+ reiserfs_write_unlock(inode->i_sb);
mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_XATTR);
down_write(&dentry->d_inode->i_alloc_sem);
+ reiserfs_write_lock(inode->i_sb);
+
err = reiserfs_setattr(dentry, &newattrs);
up_write(&dentry->d_inode->i_alloc_sem);
mutex_unlock(&dentry->d_inode->i_mutex);
return err;
}
-/* Actual operations that are exported to VFS-land */
-struct xattr_handler *reiserfs_xattr_handlers[] = {
- &reiserfs_xattr_user_handler,
- &reiserfs_xattr_trusted_handler,
-#ifdef CONFIG_REISERFS_FS_SECURITY
- &reiserfs_xattr_security_handler,
-#endif
-#ifdef CONFIG_REISERFS_FS_POSIX_ACL
- &reiserfs_posix_acl_access_handler,
- &reiserfs_posix_acl_default_handler,
-#endif
- NULL
-};
-
/*
* In order to implement different sets of xattr operations for each xattr
* prefix with the generic xattr API, a filesystem should create a
reiserfs_getxattr(struct dentry * dentry, const char *name, void *buffer,
size_t size)
{
- struct inode *inode = dentry->d_inode;
struct xattr_handler *handler;
- handler = find_xattr_handler_prefix(inode->i_sb->s_xattr, name);
+ handler = find_xattr_handler_prefix(dentry->d_sb->s_xattr, name);
- if (!handler || get_inode_sd_version(inode) == STAT_DATA_V1)
+ if (!handler || get_inode_sd_version(dentry->d_inode) == STAT_DATA_V1)
return -EOPNOTSUPP;
- return handler->get(inode, name, buffer, size);
+ return handler->get(dentry, name, buffer, size, handler->flags);
}
/*
reiserfs_setxattr(struct dentry *dentry, const char *name, const void *value,
size_t size, int flags)
{
- struct inode *inode = dentry->d_inode;
struct xattr_handler *handler;
- handler = find_xattr_handler_prefix(inode->i_sb->s_xattr, name);
+ handler = find_xattr_handler_prefix(dentry->d_sb->s_xattr, name);
- if (!handler || get_inode_sd_version(inode) == STAT_DATA_V1)
+ if (!handler || get_inode_sd_version(dentry->d_inode) == STAT_DATA_V1)
return -EOPNOTSUPP;
- return handler->set(inode, name, value, size, flags);
+ return handler->set(dentry, name, value, size, flags, handler->flags);
}
/*
*/
int reiserfs_removexattr(struct dentry *dentry, const char *name)
{
- struct inode *inode = dentry->d_inode;
struct xattr_handler *handler;
- handler = find_xattr_handler_prefix(inode->i_sb->s_xattr, name);
+ handler = find_xattr_handler_prefix(dentry->d_sb->s_xattr, name);
- if (!handler || get_inode_sd_version(inode) == STAT_DATA_V1)
+ if (!handler || get_inode_sd_version(dentry->d_inode) == STAT_DATA_V1)
return -EOPNOTSUPP;
- return handler->set(inode, name, NULL, 0, XATTR_REPLACE);
+ return handler->set(dentry, name, NULL, 0, XATTR_REPLACE, handler->flags);
}
struct listxattr_buf {
size_t size;
size_t pos;
char *buf;
- struct inode *inode;
+ struct dentry *dentry;
};
static int listxattr_filler(void *buf, const char *name, int namelen,
if (name[0] != '.' ||
(namelen != 1 && (name[1] != '.' || namelen != 2))) {
struct xattr_handler *handler;
- handler = find_xattr_handler_prefix(b->inode->i_sb->s_xattr,
+ handler = find_xattr_handler_prefix(b->dentry->d_sb->s_xattr,
name);
if (!handler) /* Unsupported xattr name */
return 0;
if (b->buf) {
- size = handler->list(b->inode, b->buf + b->pos,
- b->size, name, namelen);
+ size = handler->list(b->dentry, b->buf + b->pos,
+ b->size, name, namelen,
+ handler->flags);
if (size > b->size)
return -ERANGE;
} else {
- size = handler->list(b->inode, NULL, 0, name, namelen);
+ size = handler->list(b->dentry, NULL, 0, name,
+ namelen, handler->flags);
}
b->pos += size;
int err = 0;
loff_t pos = 0;
struct listxattr_buf buf = {
- .inode = dentry->d_inode,
+ .dentry = dentry,
.buf = buffer,
.size = buffer ? size : 0,
};
if (!dentry->d_inode)
return -EINVAL;
- if (!reiserfs_xattrs(dentry->d_sb) ||
+ if (!dentry->d_sb->s_xattr ||
get_inode_sd_version(dentry->d_inode) == STAT_DATA_V1)
return -EOPNOTSUPP;
return error;
}
-int reiserfs_permission(struct inode *inode, int mask)
-{
- /*
- * We don't do permission checks on the internal objects.
- * Permissions are determined by the "owning" object.
- */
- if (IS_PRIVATE(inode))
- return 0;
- /*
- * Stat data v1 doesn't support ACLs.
- */
- if (get_inode_sd_version(inode) == STAT_DATA_V1)
- return generic_permission(inode, mask, NULL);
- else
- return generic_permission(inode, mask, reiserfs_check_acl);
-}
-
static int create_privroot(struct dentry *dentry)
{
int err;
return 0;
}
+#else
+int __init reiserfs_xattr_register_handlers(void) { return 0; }
+void reiserfs_xattr_unregister_handlers(void) {}
+static int create_privroot(struct dentry *dentry) { return 0; }
+#endif
+
+/* Actual operations that are exported to VFS-land */
+struct xattr_handler *reiserfs_xattr_handlers[] = {
+#ifdef CONFIG_REISERFS_FS_XATTR
+ &reiserfs_xattr_user_handler,
+ &reiserfs_xattr_trusted_handler,
+#endif
+#ifdef CONFIG_REISERFS_FS_SECURITY
+ &reiserfs_xattr_security_handler,
+#endif
+#ifdef CONFIG_REISERFS_FS_POSIX_ACL
+ &reiserfs_posix_acl_access_handler,
+ &reiserfs_posix_acl_default_handler,
+#endif
+ NULL
+};
+
static int xattr_mount_check(struct super_block *s)
{
/* We need generation numbers to ensure that the oid mapping is correct
return 0;
}
-#else
-int __init reiserfs_xattr_register_handlers(void) { return 0; }
-void reiserfs_xattr_unregister_handlers(void) {}
+int reiserfs_permission(struct inode *inode, int mask)
+{
+ /*
+ * We don't do permission checks on the internal objects.
+ * Permissions are determined by the "owning" object.
+ */
+ if (IS_PRIVATE(inode))
+ return 0;
+
+#ifdef CONFIG_REISERFS_FS_XATTR
+ /*
+ * Stat data v1 doesn't support ACLs.
+ */
+ if (get_inode_sd_version(inode) != STAT_DATA_V1)
+ return generic_permission(inode, mask, reiserfs_check_acl);
#endif
+ return generic_permission(inode, mask, NULL);
+}
/* This will catch lookups from the fs root to .reiserfs_priv */
static int
int err = 0;
/* If we don't have the privroot located yet - go find it */
- mutex_lock(&s->s_root->d_inode->i_mutex);
+ reiserfs_mutex_lock_safe(&s->s_root->d_inode->i_mutex, s);
dentry = lookup_one_len(PRIVROOT_NAME, s->s_root,
strlen(PRIVROOT_NAME));
if (!IS_ERR(dentry)) {
REISERFS_SB(s)->priv_root = dentry;
- s->s_root->d_op = &xattr_lookup_poison_ops;
+ if (!reiserfs_expose_privroot(s))
+ s->s_root->d_op = &xattr_lookup_poison_ops;
if (dentry->d_inode)
dentry->d_inode->i_flags |= S_PRIVATE;
} else
int reiserfs_xattr_init(struct super_block *s, int mount_flags)
{
int err = 0;
+ struct dentry *privroot = REISERFS_SB(s)->priv_root;
-#ifdef CONFIG_REISERFS_FS_XATTR
err = xattr_mount_check(s);
if (err)
goto error;
- if (!REISERFS_SB(s)->priv_root->d_inode && !(mount_flags & MS_RDONLY)) {
- mutex_lock(&s->s_root->d_inode->i_mutex);
+ if (!privroot->d_inode && !(mount_flags & MS_RDONLY)) {
+ reiserfs_mutex_lock_safe(&s->s_root->d_inode->i_mutex, s);
err = create_privroot(REISERFS_SB(s)->priv_root);
mutex_unlock(&s->s_root->d_inode->i_mutex);
}
- if (!err)
+
+ if (privroot->d_inode) {
s->s_xattr = reiserfs_xattr_handlers;
+ reiserfs_mutex_lock_safe(&privroot->d_inode->i_mutex, s);
+ if (!REISERFS_SB(s)->xattr_root) {
+ struct dentry *dentry;
+ dentry = lookup_one_len(XAROOT_NAME, privroot,
+ strlen(XAROOT_NAME));
+ if (!IS_ERR(dentry))
+ REISERFS_SB(s)->xattr_root = dentry;
+ else
+ err = PTR_ERR(dentry);
+ }
+ mutex_unlock(&privroot->d_inode->i_mutex);
+ }
error:
if (err) {
clear_bit(REISERFS_XATTRS_USER, &(REISERFS_SB(s)->s_mount_opt));
clear_bit(REISERFS_POSIXACL, &(REISERFS_SB(s)->s_mount_opt));
}
-#endif
/* The super_block MS_POSIXACL must mirror the (no)acl mount option. */
- s->s_flags = s->s_flags & ~MS_POSIXACL;
-#ifdef CONFIG_REISERFS_FS_POSIX_ACL
if (reiserfs_posixacl(s))
s->s_flags |= MS_POSIXACL;
-#endif
+ else
+ s->s_flags &= ~MS_POSIXACL;
return err;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff