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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /fs/ext4/xattr_trusted.c | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'fs/ext4/xattr_trusted.c')
-rw-r--r-- | fs/ext4/xattr_trusted.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/fs/ext4/xattr_trusted.c b/fs/ext4/xattr_trusted.c new file mode 100644 index 00000000..95f1f4ab --- /dev/null +++ b/fs/ext4/xattr_trusted.c @@ -0,0 +1,58 @@ +/* + * linux/fs/ext4/xattr_trusted.c + * Handler for trusted extended attributes. + * + * Copyright (C) 2003 by Andreas Gruenbacher, <a.gruenbacher@computer.org> + */ + +#include <linux/string.h> +#include <linux/capability.h> +#include <linux/fs.h> +#include "ext4_jbd2.h" +#include "ext4.h" +#include "xattr.h" + +static size_t +ext4_xattr_trusted_list(struct dentry *dentry, char *list, size_t list_size, + const char *name, size_t name_len, int type) +{ + const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; + const size_t total_len = prefix_len + name_len + 1; + + if (!capable(CAP_SYS_ADMIN)) + return 0; + + if (list && total_len <= list_size) { + memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); + memcpy(list+prefix_len, name, name_len); + list[prefix_len + name_len] = '\0'; + } + return total_len; +} + +static int +ext4_xattr_trusted_get(struct dentry *dentry, const char *name, void *buffer, + size_t size, int type) +{ + if (strcmp(name, "") == 0) + return -EINVAL; + return ext4_xattr_get(dentry->d_inode, EXT4_XATTR_INDEX_TRUSTED, + name, buffer, size); +} + +static int +ext4_xattr_trusted_set(struct dentry *dentry, const char *name, + const void *value, size_t size, int flags, int type) +{ + if (strcmp(name, "") == 0) + return -EINVAL; + return ext4_xattr_set(dentry->d_inode, EXT4_XATTR_INDEX_TRUSTED, + name, value, size, flags); +} + +const struct xattr_handler ext4_xattr_trusted_handler = { + .prefix = XATTR_TRUSTED_PREFIX, + .list = ext4_xattr_trusted_list, + .get = ext4_xattr_trusted_get, + .set = ext4_xattr_trusted_set, +}; |