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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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3767e255b3
smack ->d_instantiate() uses ->setxattr(), so to be able to call it before
we'd hashed the new dentry and attached it to inode, we need ->setxattr()
instances getting the inode as an explicit argument rather than obtaining
it from dentry.
Similar change for ->getxattr() had been done in commit ce23e64. Unlike
->getxattr() (which is used by both selinux and smack instances of
->d_instantiate()) ->setxattr() is used only by smack one and unfortunately
it got missed back then.
Reported-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Tested-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
121 lines
2.6 KiB
C
121 lines
2.6 KiB
C
/*
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* linux/fs/hfs/attr.c
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*
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* (C) 2003 Ardis Technologies <roman@ardistech.com>
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*
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* Export hfs data via xattr
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*/
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#include <linux/fs.h>
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#include <linux/xattr.h>
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#include "hfs_fs.h"
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#include "btree.h"
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int hfs_setxattr(struct dentry *unused, struct inode *inode,
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const char *name, const void *value,
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size_t size, int flags)
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{
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struct hfs_find_data fd;
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hfs_cat_rec rec;
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struct hfs_cat_file *file;
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int res;
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if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode))
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return -EOPNOTSUPP;
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res = hfs_find_init(HFS_SB(inode->i_sb)->cat_tree, &fd);
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if (res)
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return res;
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fd.search_key->cat = HFS_I(inode)->cat_key;
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res = hfs_brec_find(&fd);
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if (res)
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goto out;
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hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
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sizeof(struct hfs_cat_file));
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file = &rec.file;
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if (!strcmp(name, "hfs.type")) {
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if (size == 4)
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memcpy(&file->UsrWds.fdType, value, 4);
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else
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res = -ERANGE;
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} else if (!strcmp(name, "hfs.creator")) {
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if (size == 4)
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memcpy(&file->UsrWds.fdCreator, value, 4);
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else
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res = -ERANGE;
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} else
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res = -EOPNOTSUPP;
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if (!res)
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hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
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sizeof(struct hfs_cat_file));
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out:
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hfs_find_exit(&fd);
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return res;
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}
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ssize_t hfs_getxattr(struct dentry *unused, struct inode *inode,
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const char *name, void *value, size_t size)
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{
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struct hfs_find_data fd;
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hfs_cat_rec rec;
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struct hfs_cat_file *file;
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ssize_t res = 0;
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if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode))
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return -EOPNOTSUPP;
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if (size) {
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res = hfs_find_init(HFS_SB(inode->i_sb)->cat_tree, &fd);
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if (res)
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return res;
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fd.search_key->cat = HFS_I(inode)->cat_key;
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res = hfs_brec_find(&fd);
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if (res)
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goto out;
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hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
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sizeof(struct hfs_cat_file));
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}
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file = &rec.file;
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if (!strcmp(name, "hfs.type")) {
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if (size >= 4) {
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memcpy(value, &file->UsrWds.fdType, 4);
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res = 4;
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} else
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res = size ? -ERANGE : 4;
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} else if (!strcmp(name, "hfs.creator")) {
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if (size >= 4) {
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memcpy(value, &file->UsrWds.fdCreator, 4);
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res = 4;
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} else
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res = size ? -ERANGE : 4;
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} else
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res = -ENODATA;
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out:
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if (size)
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hfs_find_exit(&fd);
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return res;
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}
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#define HFS_ATTRLIST_SIZE (sizeof("hfs.creator")+sizeof("hfs.type"))
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ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size)
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{
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struct inode *inode = d_inode(dentry);
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if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode))
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return -EOPNOTSUPP;
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if (!buffer || !size)
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return HFS_ATTRLIST_SIZE;
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if (size < HFS_ATTRLIST_SIZE)
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return -ERANGE;
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strcpy(buffer, "hfs.type");
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strcpy(buffer + sizeof("hfs.type"), "hfs.creator");
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return HFS_ATTRLIST_SIZE;
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}
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