kernel.git/fs/ceph/acl.c, branch linux-4.7.y

ceph: Get rid of d_find_alias in ceph_set_acl

2016-04-23T19:41:30Z

Create a variant of ceph_setattr that takes an inode instead of a dentry. Change __ceph_setxattr (and also __ceph_removexattr) to take an inode instead of a dentry. Use those in ceph_set_acl so that we no longer need a dentry there. Signed-off-by: Andreas Gruenbacher Signed-off-by: "Yan, Zheng" Signed-off-by: Al Viro

posix_acl: Inode acl caching fixes

2016-03-31T04:30:15Z

When get_acl() is called for an inode whose ACL is not cached yet, the get_acl inode operation is called to fetch the ACL from the filesystem. The inode operation is responsible for updating the cached acl with set_cached_acl(). This is done without locking at the VFS level, so another task can call set_cached_acl() or forget_cached_acl() before the get_acl inode operation gets to calling set_cached_acl(), and then get_acl's call to set_cached_acl() results in caching an outdate ACL. Prevent this from happening by setting the cached ACL pointer to a task-specific sentinel value before calling the get_acl inode operation. Move the responsibility for updating the cached ACL from the get_acl inode operations to get_acl(). There, only set the cached ACL if the sentinel value hasn't changed. The sentinel values are chosen to have odd values. Likewise, the value of ACL_NOT_CACHED is odd. In contrast, ACL object pointers always have an even value (ACLs are aligned in memory). This allows to distinguish uncached ACLs values from ACL objects. In addition, switch from guarding inode->i_acl and inode->i_default_acl upates by the inode->i_lock spinlock to using xchg() and cmpxchg(). Filesystems that do not want ACLs returned from their get_acl inode operations to be cached must call forget_cached_acl() to prevent the VFS from doing so. (Patch written by Al Viro and Andreas Gruenbacher.) Signed-off-by: Andreas Gruenbacher Signed-off-by: Al Viro

posix acls: Remove duplicate xattr name definitions

2015-12-07T02:25:17Z

Remove POSIX_ACL_XATTR_{ACCESS,DEFAULT} and GFS2_POSIX_ACL_{ACCESS,DEFAULT} and replace them with the definitions in . Signed-off-by: Andreas Gruenbacher Reviewed-by: James Morris Signed-off-by: Al Viro

ceph: switch some GFP_NOFS memory allocation to GFP_KERNEL

2015-06-25T08:49:31Z

GFP_NOFS memory allocation is required for page writeback path. But there is no need to use GFP_NOFS in syscall path and readpage path Signed-off-by: Yan, Zheng

ceph: acl: Remove unused function

2015-02-19T10:31:38Z

Remove the function ceph_get_cached_acl() that is not used anywhere. This was partially found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist Reviewed-by: Yan, Zheng

ceph: include the initial ACL in create/mkdir/mknod MDS requests

2014-10-14T19:56:49Z

Current code set new file/directory's initial ACL in a non-atomic manner. Client first sends request to MDS to create new file/directory, then set the initial ACL after the new file/directory is successfully created. The fix is include the initial ACL in create/mkdir/mknod MDS requests. So MDS can handle creating file/directory and setting the initial ACL in one request. Signed-off-by: Yan, Zheng Reviewed-by: Sage Weil

ceph: properly apply umask when ACL is enabled

2014-07-08T11:08:47Z

when ACL is enabled, posix_acl_create() may change inode's mode Signed-off-by: Yan, Zheng

ceph: remove useless ACL check

2014-06-06T01:29:50Z

posix_acl_xattr_set() already does the check, and it's the only way to feed in an ACL from userspace. So the check here is useless, remove it. Signed-off-by: zhang zhen Reviewed-by: Yan, Zheng

ceph: make ceph_forget_all_cached_acls() static inline

2014-02-17T20:37:12Z

Signed-off-by: Guangliang Zhao Reviewed-by: Alex Elder Signed-off-by: Sage Weil

ceph: fix ceph_set_acl()

2014-02-17T20:37:11Z

If acl is equivalent to file mode permission bits, ceph_set_acl() needs to remove any existing acl xattr. Use __ceph_setxattr() to handle both setting and removing acl xattr cases, it doesn't return -ENODATA when there is no acl xattr. Signed-off-by: Yan, Zheng