linux-imx

// SPDX-License-Identifier: GPL-2.0

#include <linux/ceph/ceph_debug.h>

#include <linux/ceph/pagelist.h>

​

#include "super.h"

#include "mds_client.h"

​

#include <linux/ceph/decode.h>

​

#include <linux/xattr.h>

#include <linux/posix_acl_xattr.h>

#include <linux/slab.h>

​

#define XATTR_CEPH_PREFIX "ceph."

#define XATTR_CEPH_PREFIX_LEN (sizeof (XATTR_CEPH_PREFIX) - 1)

​

static int __remove_xattr(struct ceph_inode_info *ci,

              struct ceph_inode_xattr *xattr);

​

static const struct xattr_handler ceph_other_xattr_handler;

​

/*

 * List of handlers for synthetic system.* attributes. Other

 * attributes are handled directly.

 */

const struct xattr_handler *ceph_xattr_handlers[] = {

#ifdef CONFIG_CEPH_FS_POSIX_ACL

    &posix_acl_access_xattr_handler,

    &posix_acl_default_xattr_handler,

#endif

    &ceph_other_xattr_handler,

    NULL,

};

​

static bool ceph_is_valid_xattr(const char *name)

{

    return !strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN) ||

           !strncmp(name, XATTR_SECURITY_PREFIX,

            XATTR_SECURITY_PREFIX_LEN) ||

           !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) ||

           !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);

}

​

/*

 * These define virtual xattrs exposing the recursive directory

 * statistics and layout metadata.

 */

struct ceph_vxattr {

    char *name;

    size_t name_size;   /* strlen(name) + 1 (for '\0') */

    size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val,

                  size_t size);

    bool (*exists_cb)(struct ceph_inode_info *ci);

    unsigned int flags;

};

​

#define VXATTR_FLAG_READONLY        (1<<0)

#define VXATTR_FLAG_HIDDEN      (1<<1)

#define VXATTR_FLAG_RSTAT       (1<<2)

​

/* layouts */

​

static bool ceph_vxattrcb_layout_exists(struct ceph_inode_info *ci)

{

    struct ceph_file_layout *fl = &ci->i_layout;

    return (fl->stripe_unit > 0 || fl->stripe_count > 0 ||

        fl->object_size > 0 || fl->pool_id >= 0 ||

        rcu_dereference_raw(fl->pool_ns) != NULL);

}

​

static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val,

                   size_t size)

{

    struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb);

    struct ceph_osd_client *osdc = &fsc->client->osdc;

    struct ceph_string *pool_ns;

    s64 pool = ci->i_layout.pool_id;

    const char *pool_name;

    const char *ns_field = " pool_namespace=";

    char buf[128];

    size_t len, total_len = 0;

    int ret;

​

    pool_ns = ceph_try_get_string(ci->i_layout.pool_ns);

​

    dout("ceph_vxattrcb_layout %p\n", &ci->vfs_inode);

    down_read(&osdc->lock);

    pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool);

    if (pool_name) {

        len = snprintf(buf, sizeof(buf),

        "stripe_unit=%u stripe_count=%u object_size=%u pool=",

        ci->i_layout.stripe_unit, ci->i_layout.stripe_count,