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author | Dave Kleikamp <shaggy@austin.ibm.com> | 2006-10-11 01:20:50 -0700 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-11 11:14:15 -0700 |
commit | ac27a0ec112a089f1a5102bc8dffc79c8c815571 (patch) | |
tree | bcbcc0a5a88bf99b35119d9d9d660a37c503d787 /fs/ext4/xattr_security.c | |
parent | 502717f4e112b18d9c37753a32f675bec9f2838b (diff) | |
download | linux-stable-ac27a0ec112a089f1a5102bc8dffc79c8c815571.tar.gz linux-stable-ac27a0ec112a089f1a5102bc8dffc79c8c815571.tar.bz2 linux-stable-ac27a0ec112a089f1a5102bc8dffc79c8c815571.zip |
[PATCH] ext4: initial copy of files from ext3
Start of the ext4 patch series. See Documentation/filesystems/ext4.txt for
details.
This is a simple copy of the files in fs/ext3 to fs/ext4 and
/usr/incude/linux/ext3* to /usr/include/ex4*
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/ext4/xattr_security.c')
-rw-r--r-- | fs/ext4/xattr_security.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/fs/ext4/xattr_security.c b/fs/ext4/xattr_security.c new file mode 100644 index 000000000000..b9c40c15647b --- /dev/null +++ b/fs/ext4/xattr_security.c @@ -0,0 +1,77 @@ +/* + * linux/fs/ext3/xattr_security.c + * Handler for storing security labels as extended attributes. + */ + +#include <linux/module.h> +#include <linux/string.h> +#include <linux/fs.h> +#include <linux/smp_lock.h> +#include <linux/ext3_jbd.h> +#include <linux/ext3_fs.h> +#include <linux/security.h> +#include "xattr.h" + +static size_t +ext3_xattr_security_list(struct inode *inode, char *list, size_t list_size, + const char *name, size_t name_len) +{ + const size_t prefix_len = sizeof(XATTR_SECURITY_PREFIX)-1; + const size_t total_len = prefix_len + name_len + 1; + + + if (list && total_len <= list_size) { + memcpy(list, XATTR_SECURITY_PREFIX, prefix_len); + memcpy(list+prefix_len, name, name_len); + list[prefix_len + name_len] = '\0'; + } + return total_len; +} + +static int +ext3_xattr_security_get(struct inode *inode, const char *name, + void *buffer, size_t size) +{ + if (strcmp(name, "") == 0) + return -EINVAL; + return ext3_xattr_get(inode, EXT3_XATTR_INDEX_SECURITY, name, + buffer, size); +} + +static int +ext3_xattr_security_set(struct inode *inode, const char *name, + const void *value, size_t size, int flags) +{ + if (strcmp(name, "") == 0) + return -EINVAL; + return ext3_xattr_set(inode, EXT3_XATTR_INDEX_SECURITY, name, + value, size, flags); +} + +int +ext3_init_security(handle_t *handle, struct inode *inode, struct inode *dir) +{ + int err; + size_t len; + void *value; + char *name; + + err = security_inode_init_security(inode, dir, &name, &value, &len); + if (err) { + if (err == -EOPNOTSUPP) + return 0; + return err; + } + err = ext3_xattr_set_handle(handle, inode, EXT3_XATTR_INDEX_SECURITY, + name, value, len, 0); + kfree(name); + kfree(value); + return err; +} + +struct xattr_handler ext3_xattr_security_handler = { + .prefix = XATTR_SECURITY_PREFIX, + .list = ext3_xattr_security_list, + .get = ext3_xattr_security_get, + .set = ext3_xattr_security_set, +}; |