diff options
author | Ingo Molnar <mingo@elte.hu> | 2009-04-07 13:47:33 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-04-07 13:47:45 +0200 |
commit | 93776a8ec746cf9d32c36e5a5b23d28d8be28826 (patch) | |
tree | 6c472ae9f709246ee5268e1d71559d07839fb965 /fs/reiserfs/xattr_security.c | |
parent | 34886c8bc590f078d4c0b88f50d061326639198d (diff) | |
parent | d508afb437daee7cf07da085b635c44a4ebf9b38 (diff) |
Merge branch 'linus' into tracing/core
Merge reason: update to upstream tracing facilities
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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 056008db137..4d3c20e787c 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, }; |