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| author |   Luis Henriques <lhenriques@suse.de> | 2020-11-23 17:38:46 +0000 |
|---|---|---|
| committer |   Ilya Dryomov <idryomov@gmail.com> | 2020-12-14 23:21:48 +0100 |
| commit | dd980fc0d598f90745dfcf3806bcc65452e03265 (patch) | |
| tree | 156ca1ca173025bfb2b86af1a516774824061cb6 /fs/ceph/xattr.c | |
| parent | ceph: when filling trace, call ceph_get_inode outside of mutexes (diff) | |
| download | linux-dev-dd980fc0d598f90745dfcf3806bcc65452e03265.tar.xz linux-dev-dd980fc0d598f90745dfcf3806bcc65452e03265.zip | |
ceph: add ceph.caps vxattr
Add a new vxattr that allows userspace to list the caps for a specific
directory or file.
[ jlayton: change format delimiter to '/' ]
Signed-off-by: Luis Henriques <lhenriques@suse.de>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph/xattr.c')
| -rw-r--r-- | fs/ceph/xattr.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c index e89750a1f039..cd8c7aaa23a0 100644 --- a/fs/ceph/xattr.c +++ b/fs/ceph/xattr.c @@ -321,6 +321,19 @@ static ssize_t ceph_vxattrcb_client_id(struct ceph_inode_info *ci, ceph_client_gid(fsc->client)); } +static ssize_t ceph_vxattrcb_caps(struct ceph_inode_info *ci, char *val, + size_t size) +{ + int issued; + + spin_lock(&ci->i_ceph_lock); + issued = __ceph_caps_issued(ci, NULL); + spin_unlock(&ci->i_ceph_lock); + + return ceph_fmt_xattr(val, size, "%s/0x%x", + ceph_cap_string(issued), issued); +} + #define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name #define CEPH_XATTR_NAME2(_type, _name, _name2) \ XATTR_CEPH_PREFIX #_type "." #_name "." #_name2 @@ -396,6 +409,13 @@ static struct ceph_vxattr ceph_dir_vxattrs[] = { .exists_cb = ceph_vxattrcb_snap_btime_exists, .flags = VXATTR_FLAG_READONLY, }, + { + .name = "ceph.caps", + .name_size = sizeof("ceph.caps"), + .getxattr_cb = ceph_vxattrcb_caps, + .exists_cb = NULL, + .flags = VXATTR_FLAG_HIDDEN, + }, { .name = NULL, 0 } /* Required table terminator */ }; @@ -421,6 +441,13 @@ static struct ceph_vxattr ceph_file_vxattrs[] = { .exists_cb = ceph_vxattrcb_snap_btime_exists, .flags = VXATTR_FLAG_READONLY, }, + { + .name = "ceph.caps", + .name_size = sizeof("ceph.caps"), + .getxattr_cb = ceph_vxattrcb_caps, + .exists_cb = NULL, + .flags = VXATTR_FLAG_HIDDEN, + }, { .name = NULL, 0 } /* Required table terminator */ }; |