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author | 2009-03-30 12:29:21 -0700 | |
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committer | 2009-03-30 12:33:01 -0700 | |
commit | e1c502482853f84606928f5a2f2eb6da1993cda1 (patch) | |
tree | ca296007164906342a195bdf3a5305277e6af5da /fs/reiserfs/xattr_security.c | |
parent | Merge branch 'x86-stage-3-for-linus' of git://git.kernel.org/pub/scm/linux/ke... (diff) | |
parent | reiserfs: rename [cn]_* variables (diff) | |
download | linux-e1c502482853f84606928f5a2f2eb6da1993cda1.tar.gz linux-e1c502482853f84606928f5a2f2eb6da1993cda1.tar.bz2 linux-e1c502482853f84606928f5a2f2eb6da1993cda1.zip |
Merge branch 'reiserfs-updates' from Jeff Mahoney
* reiserfs-updates: (35 commits)
reiserfs: rename [cn]_* variables
reiserfs: rename p_._ variables
reiserfs: rename p_s_tb to tb
reiserfs: rename p_s_inode to inode
reiserfs: rename p_s_bh to bh
reiserfs: rename p_s_sb to sb
reiserfs: strip trailing whitespace
reiserfs: cleanup path functions
reiserfs: factor out buffer_info initialization
reiserfs: add atomic addition of selinux attributes during inode creation
reiserfs: use generic readdir for operations across all xattrs
reiserfs: journaled xattrs
reiserfs: use generic xattr handlers
reiserfs: remove i_has_xattr_dir
reiserfs: make per-inode xattr locking more fine grained
reiserfs: eliminate per-super xattr lock
reiserfs: simplify xattr internal file lookups/opens
reiserfs: Clean up xattrs when REISERFS_FS_XATTR is unset
reiserfs: remove IS_PRIVATE helpers
reiserfs: remove link detection code
...
Fixed up conflicts manually due to:
- quota name cleanups vs variable naming changes:
fs/reiserfs/inode.c
fs/reiserfs/namei.c
fs/reiserfs/stree.c
fs/reiserfs/xattr.c
- exported include header cleanups
include/linux/reiserfs_fs.h
Diffstat (limited to 'fs/reiserfs/xattr_security.c')
-rw-r--r-- | fs/reiserfs/xattr_security.c | 80 |
1 files changed, 62 insertions, 18 deletions
diff --git a/fs/reiserfs/xattr_security.c b/fs/reiserfs/xattr_security.c index 056008db1377..4d3c20e787c3 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 @@ -12,7 +13,7 @@ security_get(struct inode *inode, const char *name, void *buffer, size_t size) if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX)) return -EINVAL; - if (is_reiserfs_priv_object(inode)) + if (IS_PRIVATE(inode)) return -EPERM; return reiserfs_xattr_get(inode, name, buffer, size); @@ -25,41 +26,84 @@ security_set(struct inode *inode, const char *name, const void *buffer, if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX)) return -EINVAL; - if (is_reiserfs_priv_object(inode)) + if (IS_PRIVATE(inode)) return -EPERM; return reiserfs_xattr_set(inode, name, buffer, size, flags); } -static int security_del(struct inode *inode, const char *name) +static size_t security_list(struct inode *inode, char *list, size_t list_len, + const char *name, size_t namelen) { - if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX)) - return -EINVAL; + const size_t len = namelen + 1; - if (is_reiserfs_priv_object(inode)) - return -EPERM; + if (IS_PRIVATE(inode)) + return 0; + + if (list && len <= list_len) { + memcpy(list, name, namelen); + list[namelen] = '\0'; + } - return 0; + return len; } -static int -security_list(struct inode *inode, const char *name, int namelen, char *out) +/* 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 len = namelen; + int blocks = 0; + int error = security_inode_init_security(inode, dir, &sec->name, + &sec->value, &sec->length); + if (error) { + if (error == -EOPNOTSUPP) + error = 0; - if (is_reiserfs_priv_object(inode)) - return 0; + sec->name = NULL; + sec->value = NULL; + sec->length = 0; + return error; + } - if (out) - memcpy(out, name, len); + 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; +} - return len; +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 reiserfs_xattr_handler security_handler = { +struct xattr_handler reiserfs_xattr_security_handler = { .prefix = XATTR_SECURITY_PREFIX, .get = security_get, .set = security_set, - .del = security_del, .list = security_list, }; |