1468babe60
Changes in 4.9.172 kbuild: simplify ld-option implementation cifs: do not attempt cifs operation on smb2+ rename error tracing: Fix a memory leak by early error exit in trace_pid_write() MIPS: scall64-o32: Fix indirect syscall number load trace: Fix preempt_enable_no_resched() abuse IB/rdmavt: Fix frwr memory registration sched/numa: Fix a possible divide-by-zero ceph: ensure d_name stability in ceph_dentry_hash() ceph: fix ci->i_head_snapc leak nfsd: Don't release the callback slot unless it was actually held sunrpc: don't mark uninitialised items as VALID. Input: synaptics-rmi4 - write config register values to the right offset dmaengine: sh: rcar-dmac: With cyclic DMA residue 0 is valid ARM: 8857/1: efi: enable CP15 DMB instructions before cleaning the cache drm/vc4: Fix memory leak during gpu reset. drm/vc4: Fix compilation error reported by kbuild test bot USB: Add new USB LPM helpers USB: Consolidate LPM checks to avoid enabling LPM twice vsock/virtio: fix kernel panic from virtio_transport_reset_no_sock tipc: handle the err returned from cmd header function slip: make slhc_free() silently accept an error pointer intel_th: gth: Fix an off-by-one in output unassigning fs/proc/proc_sysctl.c: Fix a NULL pointer dereference NFS: Forbid setting AF_INET6 to "struct sockaddr_in"->sin_family. netfilter: ebtables: CONFIG_COMPAT: drop a bogus WARN_ON fm10k: Fix a potential NULL pointer dereference tipc: check bearer name with right length in tipc_nl_compat_bearer_enable tipc: check link name with right length in tipc_nl_compat_link_set Revert "block/loop: Use global lock for ioctl() operation." ipv4: add sanity checks in ipv4_link_failure() mlxsw: spectrum: Fix autoneg status in ethtool net/mlx5e: ethtool, Remove unsupported SFP EEPROM high pages query net: rds: exchange of 8K and 1M pool team: fix possible recursive locking when add slaves net: stmmac: move stmmac_check_ether_addr() to driver probe ipv4: set the tcp_min_rtt_wlen range from 0 to one day ipv6: frags: fix a lockdep false positive net: IP defrag: encapsulate rbtree defrag code into callable functions ipv6: remove dependency of nf_defrag_ipv6 on ipv6 module net: IP6 defrag: use rbtrees for IPv6 defrag net: IP6 defrag: use rbtrees in nf_conntrack_reasm.c powerpc/fsl: Add FSL_PPC_BOOK3E as supported arch for nospectre_v2 boot arg Documentation: Add nospectre_v1 parameter Linux 4.9.172 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
/*
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* loop.h
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*
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* Written by Theodore Ts'o, 3/29/93.
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*
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* Copyright 1993 by Theodore Ts'o. Redistribution of this file is
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* permitted under the GNU General Public License.
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*/
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#ifndef _LINUX_LOOP_H
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#define _LINUX_LOOP_H
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#include <linux/bio.h>
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#include <linux/blkdev.h>
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#include <linux/blk-mq.h>
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#include <linux/spinlock.h>
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#include <linux/mutex.h>
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#include <linux/kthread.h>
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#include <uapi/linux/loop.h>
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/* Possible states of device */
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enum {
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Lo_unbound,
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Lo_bound,
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Lo_rundown,
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};
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struct loop_func_table;
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struct loop_device {
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int lo_number;
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atomic_t lo_refcnt;
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loff_t lo_offset;
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loff_t lo_sizelimit;
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int lo_flags;
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int (*transfer)(struct loop_device *, int cmd,
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struct page *raw_page, unsigned raw_off,
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struct page *loop_page, unsigned loop_off,
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int size, sector_t real_block);
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char lo_file_name[LO_NAME_SIZE];
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char lo_crypt_name[LO_NAME_SIZE];
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char lo_encrypt_key[LO_KEY_SIZE];
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int lo_encrypt_key_size;
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struct loop_func_table *lo_encryption;
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__u32 lo_init[2];
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kuid_t lo_key_owner; /* Who set the key */
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int (*ioctl)(struct loop_device *, int cmd,
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unsigned long arg);
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struct file * lo_backing_file;
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struct block_device *lo_device;
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unsigned lo_blocksize;
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void *key_data;
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gfp_t old_gfp_mask;
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spinlock_t lo_lock;
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int lo_state;
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struct mutex lo_ctl_mutex;
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struct kthread_worker worker;
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struct task_struct *worker_task;
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bool use_dio;
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bool sysfs_inited;
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struct request_queue *lo_queue;
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struct blk_mq_tag_set tag_set;
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struct gendisk *lo_disk;
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};
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struct loop_cmd {
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struct kthread_work work;
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struct request *rq;
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struct list_head list;
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bool use_aio; /* use AIO interface to handle I/O */
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struct kiocb iocb;
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};
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/* Support for loadable transfer modules */
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struct loop_func_table {
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int number; /* filter type */
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int (*transfer)(struct loop_device *lo, int cmd,
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struct page *raw_page, unsigned raw_off,
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struct page *loop_page, unsigned loop_off,
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int size, sector_t real_block);
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int (*init)(struct loop_device *, const struct loop_info64 *);
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/* release is called from loop_unregister_transfer or clr_fd */
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int (*release)(struct loop_device *);
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int (*ioctl)(struct loop_device *, int cmd, unsigned long arg);
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struct module *owner;
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};
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int loop_register_transfer(struct loop_func_table *funcs);
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int loop_unregister_transfer(int number);
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#endif
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