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-rw-r--r--fs/reiserfs/inode.c16
-rw-r--r--fs/reiserfs/namei.c37
-rw-r--r--fs/reiserfs/xattr_security.c54
-rw-r--r--include/linux/reiserfs_fs.h4
-rw-r--r--include/linux/reiserfs_xattr.h32
5 files changed, 137 insertions, 6 deletions
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 995f697..fcd302d 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -1747,7 +1747,8 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
/* 0 for regular, EMTRY_DIR_SIZE for dirs,
strlen (symname) for symlinks) */
loff_t i_size, struct dentry *dentry,
- struct inode *inode)
+ struct inode *inode,
+ struct reiserfs_security_handle *security)
{
struct super_block *sb;
struct reiserfs_iget_args args;
@@ -1929,6 +1930,19 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
} else if (IS_PRIVATE(dir))
inode->i_flags |= S_PRIVATE;
+ if (security->name) {
+ retval = reiserfs_security_write(th, inode, security);
+ if (retval) {
+ err = retval;
+ reiserfs_check_path(&path_to_key);
+ retval = journal_end(th, th->t_super,
+ th->t_blocks_allocated);
+ if (retval)
+ err = retval;
+ goto out_inserted_sd;
+ }
+ }
+
reiserfs_update_sd(th, inode);
reiserfs_check_path(&path_to_key);
diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c
index d9c1c8b..cb1a9e9 100644
--- a/fs/reiserfs/namei.c
+++ b/fs/reiserfs/namei.c
@@ -598,6 +598,7 @@ static int reiserfs_create(struct inode *dir, struct dentry *dentry, int mode,
2 * (REISERFS_QUOTA_INIT_BLOCKS(dir->i_sb) +
REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb));
struct reiserfs_transaction_handle th;
+ struct reiserfs_security_handle security;
if (!(inode = new_inode(dir->i_sb))) {
return -ENOMEM;
@@ -605,6 +606,12 @@ static int reiserfs_create(struct inode *dir, struct dentry *dentry, int mode,
new_inode_init(inode, dir, mode);
jbegin_count += reiserfs_cache_default_acl(dir);
+ retval = reiserfs_security_init(dir, inode, &security);
+ if (retval < 0) {
+ drop_new_inode(inode);
+ return retval;
+ }
+ jbegin_count += retval;
reiserfs_write_lock(dir->i_sb);
retval = journal_begin(&th, dir->i_sb, jbegin_count);
@@ -615,7 +622,7 @@ static int reiserfs_create(struct inode *dir, struct dentry *dentry, int mode,
retval =
reiserfs_new_inode(&th, dir, mode, NULL, 0 /*i_size */ , dentry,
- inode);
+ inode, &security);
if (retval)
goto out_failed;
@@ -655,6 +662,7 @@ static int reiserfs_mknod(struct inode *dir, struct dentry *dentry, int mode,
int retval;
struct inode *inode;
struct reiserfs_transaction_handle th;
+ struct reiserfs_security_handle security;
/* We need blocks for transaction + (user+group)*(quotas for new inode + update of quota for directory owner) */
int jbegin_count =
JOURNAL_PER_BALANCE_CNT * 3 +
@@ -670,6 +678,12 @@ static int reiserfs_mknod(struct inode *dir, struct dentry *dentry, int mode,
new_inode_init(inode, dir, mode);
jbegin_count += reiserfs_cache_default_acl(dir);
+ retval = reiserfs_security_init(dir, inode, &security);
+ if (retval < 0) {
+ drop_new_inode(inode);
+ return retval;
+ }
+ jbegin_count += retval;
reiserfs_write_lock(dir->i_sb);
retval = journal_begin(&th, dir->i_sb, jbegin_count);
@@ -680,7 +694,7 @@ static int reiserfs_mknod(struct inode *dir, struct dentry *dentry, int mode,
retval =
reiserfs_new_inode(&th, dir, mode, NULL, 0 /*i_size */ , dentry,
- inode);
+ inode, &security);
if (retval) {
goto out_failed;
}
@@ -723,6 +737,7 @@ static int reiserfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
int retval;
struct inode *inode;
struct reiserfs_transaction_handle th;
+ struct reiserfs_security_handle security;
/* We need blocks for transaction + (user+group)*(quotas for new inode + update of quota for directory owner) */
int jbegin_count =
JOURNAL_PER_BALANCE_CNT * 3 +
@@ -740,6 +755,12 @@ static int reiserfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
new_inode_init(inode, dir, mode);
jbegin_count += reiserfs_cache_default_acl(dir);
+ retval = reiserfs_security_init(dir, inode, &security);
+ if (retval < 0) {
+ drop_new_inode(inode);
+ return retval;
+ }
+ jbegin_count += retval;
reiserfs_write_lock(dir->i_sb);
retval = journal_begin(&th, dir->i_sb, jbegin_count);
@@ -756,7 +777,7 @@ static int reiserfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
retval = reiserfs_new_inode(&th, dir, mode, NULL /*symlink */ ,
old_format_only(dir->i_sb) ?
EMPTY_DIR_SIZE_V1 : EMPTY_DIR_SIZE,
- dentry, inode);
+ dentry, inode, &security);
if (retval) {
dir->i_nlink--;
goto out_failed;
@@ -999,6 +1020,7 @@ static int reiserfs_symlink(struct inode *parent_dir,
char *name;
int item_len;
struct reiserfs_transaction_handle th;
+ struct reiserfs_security_handle security;
int mode = S_IFLNK | S_IRWXUGO;
/* We need blocks for transaction + (user+group)*(quotas for new inode + update of quota for directory owner) */
int jbegin_count =
@@ -1011,6 +1033,13 @@ static int reiserfs_symlink(struct inode *parent_dir,
}
new_inode_init(inode, parent_dir, mode);
+ retval = reiserfs_security_init(parent_dir, inode, &security);
+ if (retval < 0) {
+ drop_new_inode(inode);
+ return retval;
+ }
+ jbegin_count += retval;
+
reiserfs_write_lock(parent_dir->i_sb);
item_len = ROUND_UP(strlen(symname));
if (item_len > MAX_DIRECT_ITEM_LEN(parent_dir->i_sb->s_blocksize)) {
@@ -1037,7 +1066,7 @@ static int reiserfs_symlink(struct inode *parent_dir,
retval =
reiserfs_new_inode(&th, parent_dir, mode, name, strlen(symname),
- dentry, inode);
+ dentry, inode, &security);
kfree(name);
if (retval) { /* reiserfs_new_inode iputs for us */
goto out_failed;
diff --git a/fs/reiserfs/xattr_security.c b/fs/reiserfs/xattr_security.c
index 2aacf1f..4d3c20e 100644
--- a/fs/reiserfs/xattr_security.c
+++ b/fs/reiserfs/xattr_security.c
@@ -4,6 +4,7 @@
#include <linux/pagemap.h>
#include <linux/xattr.h>
#include <linux/reiserfs_xattr.h>
+#include <linux/security.h>
#include <asm/uaccess.h>
static int
@@ -47,6 +48,59 @@ static size_t security_list(struct inode *inode, char *list, size_t list_len,
return len;
}
+/* Initializes the security context for a new inode and returns the number
+ * of blocks needed for the transaction. If successful, reiserfs_security
+ * must be released using reiserfs_security_free when the caller is done. */
+int reiserfs_security_init(struct inode *dir, struct inode *inode,
+ struct reiserfs_security_handle *sec)
+{
+ int blocks = 0;
+ int error = security_inode_init_security(inode, dir, &sec->name,
+ &sec->value, &sec->length);
+ if (error) {
+ if (error == -EOPNOTSUPP)
+ error = 0;
+
+ sec->name = NULL;
+ sec->value = NULL;
+ sec->length = 0;
+ return error;
+ }
+
+ if (sec->length) {
+ blocks = reiserfs_xattr_jcreate_nblocks(inode) +
+ reiserfs_xattr_nblocks(inode, sec->length);
+ /* We don't want to count the directories twice if we have
+ * a default ACL. */
+ REISERFS_I(inode)->i_flags |= i_has_xattr_dir;
+ }
+ return blocks;
+}
+
+int reiserfs_security_write(struct reiserfs_transaction_handle *th,
+ struct inode *inode,
+ struct reiserfs_security_handle *sec)
+{
+ int error;
+ if (strlen(sec->name) < sizeof(XATTR_SECURITY_PREFIX))
+ return -EINVAL;
+
+ error = reiserfs_xattr_set_handle(th, inode, sec->name, sec->value,
+ sec->length, XATTR_CREATE);
+ if (error == -ENODATA || error == -EOPNOTSUPP)
+ error = 0;
+
+ return error;
+}
+
+void reiserfs_security_free(struct reiserfs_security_handle *sec)
+{
+ kfree(sec->name);
+ kfree(sec->value);
+ sec->name = NULL;
+ sec->value = NULL;
+}
+
struct xattr_handler reiserfs_xattr_security_handler = {
.prefix = XATTR_SECURITY_PREFIX,
.get = security_get,
diff --git a/include/linux/reiserfs_fs.h b/include/linux/reiserfs_fs.h
index c0365e0..eb4e912e 100644
--- a/include/linux/reiserfs_fs.h
+++ b/include/linux/reiserfs_fs.h
@@ -1915,10 +1915,12 @@ void make_le_item_head(struct item_head *ih, const struct cpu_key *key,
loff_t offset, int type, int length, int entry_count);
struct inode *reiserfs_iget(struct super_block *s, const struct cpu_key *key);
+struct reiserfs_security_handle;
int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
struct inode *dir, int mode,
const char *symname, loff_t i_size,
- struct dentry *dentry, struct inode *inode);
+ struct dentry *dentry, struct inode *inode,
+ struct reiserfs_security_handle *security);
void reiserfs_update_sd_size(struct reiserfs_transaction_handle *th,
struct inode *inode, loff_t size);
diff --git a/include/linux/reiserfs_xattr.h b/include/linux/reiserfs_xattr.h
index 20eca09..dcae01e 100644
--- a/include/linux/reiserfs_xattr.h
+++ b/include/linux/reiserfs_xattr.h
@@ -15,6 +15,12 @@ struct reiserfs_xattr_header {
__le32 h_hash; /* hash of the value */
};
+struct reiserfs_security_handle {
+ char *name;
+ void *value;
+ size_t length;
+};
+
#ifdef __KERNEL__
#include <linux/init.h>
@@ -54,6 +60,14 @@ int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *,
extern struct xattr_handler reiserfs_xattr_user_handler;
extern struct xattr_handler reiserfs_xattr_trusted_handler;
extern struct xattr_handler reiserfs_xattr_security_handler;
+#ifdef CONFIG_REISERFS_FS_SECURITY
+int reiserfs_security_init(struct inode *dir, struct inode *inode,
+ struct reiserfs_security_handle *sec);
+int reiserfs_security_write(struct reiserfs_transaction_handle *th,
+ struct inode *inode,
+ struct reiserfs_security_handle *sec);
+void reiserfs_security_free(struct reiserfs_security_handle *sec);
+#endif
#define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header))
static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size)
@@ -109,6 +123,24 @@ static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
}
#endif /* CONFIG_REISERFS_FS_XATTR */
+#ifndef CONFIG_REISERFS_FS_SECURITY
+static inline int reiserfs_security_init(struct inode *dir,
+ struct inode *inode,
+ struct reiserfs_security_handle *sec)
+{
+ return 0;
+}
+static inline int
+reiserfs_security_write(struct reiserfs_transaction_handle *th,
+ struct inode *inode,
+ struct reiserfs_security_handle *sec)
+{
+ return 0;
+}
+static inline void reiserfs_security_free(struct reiserfs_security_handle *sec)
+{}
+#endif
+
#endif /* __KERNEL__ */
#endif /* _LINUX_REISERFS_XATTR_H */
generated by cgit v1.1 at 2024-06-13 04:27:44 +0000