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author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-18 11:51:59 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-18 11:51:59 -0700 |
commit | 9e17632c0a146891c90a4353a160cfcf71f34b8f (patch) | |
tree | 9ab52130a11cdc9cac5f4727b773badf1279555f /kernel/bpf | |
parent | 69370471d0b2fc3020c60f5473b1eef5977d165a (diff) | |
parent | 2c4cb04300fa160e9d78335c74184c4e66a56437 (diff) | |
download | blackbird-op-linux-9e17632c0a146891c90a4353a160cfcf71f34b8f.tar.gz blackbird-op-linux-9e17632c0a146891c90a4353a160cfcf71f34b8f.zip |
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull misc vfs cleanups from Al Viro:
"Assorted cleanups and fixes all over the place"
* 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
coredump: only charge written data against RLIMIT_CORE
coredump: get rid of coredump_params->written
ecryptfs_lookup(): try either only encrypted or plaintext name
ecryptfs: avoid multiple aliases for directories
bpf: reject invalid names right in ->lookup()
__d_alloc(): treat NULL name as QSTR("/", 1)
mtd: switch ubi_open_volume_path() to vfs_stat()
mtd: switch open_mtd_by_chdev() to use of vfs_stat()
Diffstat (limited to 'kernel/bpf')
-rw-r--r-- | kernel/bpf/inode.c | 37 |
1 files changed, 8 insertions, 29 deletions
diff --git a/kernel/bpf/inode.c b/kernel/bpf/inode.c index 8f94ca1860cf..71b75d9c81da 100644 --- a/kernel/bpf/inode.c +++ b/kernel/bpf/inode.c @@ -119,18 +119,10 @@ static int bpf_inode_type(const struct inode *inode, enum bpf_type *type) return 0; } -static bool bpf_dname_reserved(const struct dentry *dentry) -{ - return strchr(dentry->d_name.name, '.'); -} - static int bpf_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) { struct inode *inode; - if (bpf_dname_reserved(dentry)) - return -EPERM; - inode = bpf_get_inode(dir->i_sb, dir, mode | S_IFDIR); if (IS_ERR(inode)) return PTR_ERR(inode); @@ -152,9 +144,6 @@ static int bpf_mkobj_ops(struct inode *dir, struct dentry *dentry, { struct inode *inode; - if (bpf_dname_reserved(dentry)) - return -EPERM; - inode = bpf_get_inode(dir->i_sb, dir, mode | S_IFREG); if (IS_ERR(inode)) return PTR_ERR(inode); @@ -187,31 +176,21 @@ static int bpf_mkobj(struct inode *dir, struct dentry *dentry, umode_t mode, } } -static int bpf_link(struct dentry *old_dentry, struct inode *dir, - struct dentry *new_dentry) +static struct dentry * +bpf_lookup(struct inode *dir, struct dentry *dentry, unsigned flags) { - if (bpf_dname_reserved(new_dentry)) - return -EPERM; - - return simple_link(old_dentry, dir, new_dentry); -} - -static int bpf_rename(struct inode *old_dir, struct dentry *old_dentry, - struct inode *new_dir, struct dentry *new_dentry) -{ - if (bpf_dname_reserved(new_dentry)) - return -EPERM; - - return simple_rename(old_dir, old_dentry, new_dir, new_dentry); + if (strchr(dentry->d_name.name, '.')) + return ERR_PTR(-EPERM); + return simple_lookup(dir, dentry, flags); } static const struct inode_operations bpf_dir_iops = { - .lookup = simple_lookup, + .lookup = bpf_lookup, .mknod = bpf_mkobj, .mkdir = bpf_mkdir, .rmdir = simple_rmdir, - .rename = bpf_rename, - .link = bpf_link, + .rename = simple_rename, + .link = simple_link, .unlink = simple_unlink, }; |