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drivers/scsi/sg.c
69.7 KB
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/* * History: * Started: Aug 9 by Lawrence Foard (entropy@world.std.com), * to allow user process control of SCSI devices. * Development Sponsored by Killy Corp. NY NY * * Original driver (sg.c): * Copyright (C) 1992 Lawrence Foard * Version 2 and 3 extensions to driver: * Copyright (C) 1998 - 2005 Douglas Gilbert * * Modified 19-JAN-1998 Richard Gooch <rgooch@atnf.csiro.au> Devfs support * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * */ |
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static int sg_version_num = 30534; /* 2 digits for each component */ #define SG_VERSION_STR "3.5.34" |
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/* * D. P. Gilbert (dgilbert@interlog.com, dougg@triode.net.au), notes: * - scsi logging is available via SCSI_LOG_TIMEOUT macros. First * the kernel/module needs to be built with CONFIG_SCSI_LOGGING * (otherwise the macros compile to empty statements). * */ |
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#include <linux/module.h> #include <linux/fs.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/string.h> #include <linux/mm.h> #include <linux/errno.h> #include <linux/mtio.h> #include <linux/ioctl.h> |
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#include <linux/slab.h> |
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#include <linux/fcntl.h> #include <linux/init.h> #include <linux/poll.h> |
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#include <linux/moduleparam.h> |
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#include <linux/cdev.h> |
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#include <linux/idr.h> |
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#include <linux/seq_file.h> #include <linux/blkdev.h> #include <linux/delay.h> |
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#include <linux/blktrace_api.h> |
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#include <linux/mutex.h> |
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#include <linux/ratelimit.h> |
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#include "scsi.h" |
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#include <scsi/scsi_dbg.h> |
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#include <scsi/scsi_host.h> #include <scsi/scsi_driver.h> #include <scsi/scsi_ioctl.h> #include <scsi/sg.h> #include "scsi_logging.h" #ifdef CONFIG_SCSI_PROC_FS #include <linux/proc_fs.h> |
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static char *sg_version_date = "20061027"; |
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static int sg_proc_init(void); static void sg_proc_cleanup(void); #endif |
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#define SG_ALLOW_DIO_DEF 0 |
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#define SG_MAX_DEVS 32768 /* * Suppose you want to calculate the formula muldiv(x,m,d)=int(x * m / d) * Then when using 32 bit integers x * m may overflow during the calculation. * Replacing muldiv(x) by muldiv(x)=((x % d) * m) / d + int(x / d) * m * calculates the same, but prevents the overflow when both m and d * are "small" numbers (like HZ and USER_HZ). * Of course an overflow is inavoidable if the result of muldiv doesn't fit * in 32 bits. */ #define MULDIV(X,MUL,DIV) ((((X % DIV) * MUL) / DIV) + ((X / DIV) * MUL)) #define SG_DEFAULT_TIMEOUT MULDIV(SG_DEFAULT_TIMEOUT_USER, HZ, USER_HZ) int sg_big_buff = SG_DEF_RESERVED_SIZE; /* N.B. This variable is readable and writeable via /proc/scsi/sg/def_reserved_size . Each time sg_open() is called a buffer of this size (or less if there is not enough memory) will be reserved for use by this file descriptor. [Deprecated usage: this variable is also readable via /proc/sys/kernel/sg-big-buff if the sg driver is built into the kernel (i.e. it is not a module).] */ static int def_reserved_size = -1; /* picks up init parameter */ static int sg_allow_dio = SG_ALLOW_DIO_DEF; |
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static int scatter_elem_sz = SG_SCATTER_SZ; static int scatter_elem_sz_prev = SG_SCATTER_SZ; |
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#define SG_SECTOR_SZ 512 |
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|
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static int sg_add(struct device *, struct class_interface *); static void sg_remove(struct device *, struct class_interface *); |
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|
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static DEFINE_MUTEX(sg_mutex); |
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static DEFINE_IDR(sg_index_idr); static DEFINE_RWLOCK(sg_index_lock); /* Also used to lock |
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file descriptor list for device */ static struct class_interface sg_interface = { |
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.add_dev = sg_add, .remove_dev = sg_remove, |
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}; typedef struct sg_scatter_hold { /* holding area for scsi scatter gather info */ unsigned short k_use_sg; /* Count of kernel scatter-gather pieces */ |
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unsigned sglist_len; /* size of malloc'd scatter-gather list ++ */ |
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unsigned bufflen; /* Size of (aggregate) data buffer */ |
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struct page **pages; int page_order; |
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char dio_in_use; /* 0->indirect IO (or mmap), 1->dio */ unsigned char cmd_opcode; /* first byte of command */ } Sg_scatter_hold; struct sg_device; /* forward declarations */ struct sg_fd; typedef struct sg_request { /* SG_MAX_QUEUE requests outstanding per file */ |
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struct sg_request *nextrp; /* NULL -> tail request (slist) */ struct sg_fd *parentfp; /* NULL -> not in use */ Sg_scatter_hold data; /* hold buffer, perhaps scatter list */ sg_io_hdr_t header; /* scsi command+info, see <scsi/sg.h> */ |
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unsigned char sense_b[SCSI_SENSE_BUFFERSIZE]; |
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char res_used; /* 1 -> using reserve buffer, 0 -> not ... */ char orphan; /* 1 -> drop on sight, 0 -> normal */ char sg_io_owned; /* 1 -> packet belongs to SG_IO */ volatile char done; /* 0->before bh, 1->before read, 2->read */ |
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struct request *rq; |
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struct bio *bio; |
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struct execute_work ew; |
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} Sg_request; typedef struct sg_fd { /* holds the state of a file descriptor */ |
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struct list_head sfd_siblings; |
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struct sg_device *parentdp; /* owning device */ wait_queue_head_t read_wait; /* queue read until command done */ rwlock_t rq_list_lock; /* protect access to list in req_arr */ int timeout; /* defaults to SG_DEFAULT_TIMEOUT */ int timeout_user; /* defaults to SG_DEFAULT_TIMEOUT_USER */ Sg_scatter_hold reserve; /* buffer held for this file descriptor */ unsigned save_scat_len; /* original length of trunc. scat. element */ Sg_request *headrp; /* head of request slist, NULL->empty */ struct fasync_struct *async_qp; /* used by asynchronous notification */ Sg_request req_arr[SG_MAX_QUEUE]; /* used as singly-linked list */ char low_dma; /* as in parent but possibly overridden to 1 */ char force_packid; /* 1 -> pack_id input to read(), 0 -> ignored */ volatile char closed; /* 1 -> fd closed but request(s) outstanding */ char cmd_q; /* 1 -> allow command queuing, 0 -> don't */ char next_cmd_len; /* 0 -> automatic (def), >0 -> use on next write() */ char keep_orphan; /* 0 -> drop orphan (def), 1 -> keep for read() */ char mmap_called; /* 0 -> mmap() never called on this fd */ |
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struct kref f_ref; struct execute_work ew; |
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} Sg_fd; typedef struct sg_device { /* holds the state of each scsi generic device */ struct scsi_device *device; wait_queue_head_t o_excl_wait; /* queue open() when O_EXCL in use */ int sg_tablesize; /* adapter's max scatter-gather table size */ |
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u32 index; /* device index number */ |
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struct list_head sfds; |
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volatile char detached; /* 0->attached, 1->detached pending removal */ volatile char exclude; /* opened for exclusive access */ char sgdebug; /* 0->off, 1->sense, 9->dump dev, 10-> all devs */ struct gendisk *disk; struct cdev * cdev; /* char_dev [sysfs: /sys/cdev/major/sg<n>] */ |
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struct kref d_ref; |
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} Sg_device; |
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/* tasklet or soft irq callback */ |
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static void sg_rq_end_io(struct request *rq, int uptodate); |
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static int sg_start_req(Sg_request *srp, unsigned char *cmd); |
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static int sg_finish_rem_req(Sg_request * srp); |
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static int sg_build_indirect(Sg_scatter_hold * schp, Sg_fd * sfp, int buff_size); |
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static ssize_t sg_new_read(Sg_fd * sfp, char __user *buf, size_t count, Sg_request * srp); |
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static ssize_t sg_new_write(Sg_fd *sfp, struct file *file, const char __user *buf, size_t count, int blocking, |
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int read_only, int sg_io_owned, Sg_request **o_srp); |
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static int sg_common_write(Sg_fd * sfp, Sg_request * srp, unsigned char *cmnd, int timeout, int blocking); |
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static int sg_read_oxfer(Sg_request * srp, char __user *outp, int num_read_xfer); static void sg_remove_scat(Sg_scatter_hold * schp); static void sg_build_reserve(Sg_fd * sfp, int req_size); static void sg_link_reserve(Sg_fd * sfp, Sg_request * srp, int size); static void sg_unlink_reserve(Sg_fd * sfp, Sg_request * srp); |
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static Sg_fd *sg_add_sfp(Sg_device * sdp, int dev); |
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static void sg_remove_sfp(struct kref *); |
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static Sg_request *sg_get_rq_mark(Sg_fd * sfp, int pack_id); static Sg_request *sg_add_request(Sg_fd * sfp); static int sg_remove_request(Sg_fd * sfp, Sg_request * srp); static int sg_res_in_use(Sg_fd * sfp); |
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static Sg_device *sg_get_dev(int dev); |
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static void sg_put_dev(Sg_device *sdp); |
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|
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#define SZ_SG_HEADER sizeof(struct sg_header) #define SZ_SG_IO_HDR sizeof(sg_io_hdr_t) #define SZ_SG_IOVEC sizeof(sg_iovec_t) #define SZ_SG_REQ_INFO sizeof(sg_req_info_t) |
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static int sg_allow_access(struct file *filp, unsigned char *cmd) { |
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struct sg_fd *sfp = filp->private_data; |
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if (sfp->parentdp->device->type == TYPE_SCANNER) return 0; |
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return blk_verify_command(cmd, filp->f_mode & FMODE_WRITE); |
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} |
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static int sg_open(struct inode *inode, struct file *filp) { int dev = iminor(inode); int flags = filp->f_flags; |
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struct request_queue *q; |
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Sg_device *sdp; Sg_fd *sfp; int res; int retval; |
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mutex_lock(&sg_mutex); |
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nonseekable_open(inode, filp); SCSI_LOG_TIMEOUT(3, printk("sg_open: dev=%d, flags=0x%x ", dev, flags)); sdp = sg_get_dev(dev); |
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if (IS_ERR(sdp)) { retval = PTR_ERR(sdp); sdp = NULL; goto sg_put; |
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} |
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/* This driver's module count bumped by fops_get in <linux/fs.h> */ /* Prevent the device driver from vanishing while we sleep */ retval = scsi_device_get(sdp->device); |
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if (retval) goto sg_put; |
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|
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retval = scsi_autopm_get_device(sdp->device); if (retval) goto sdp_put; |
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if (!((flags & O_NONBLOCK) || scsi_block_when_processing_errors(sdp->device))) { retval = -ENXIO; /* we are in error recovery for this device */ goto error_out; } if (flags & O_EXCL) { if (O_RDONLY == (flags & O_ACCMODE)) { retval = -EPERM; /* Can't lock it with read only access */ goto error_out; } |
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if (!list_empty(&sdp->sfds) && (flags & O_NONBLOCK)) { |
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retval = -EBUSY; goto error_out; } res = 0; __wait_event_interruptible(sdp->o_excl_wait, |
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((!list_empty(&sdp->sfds) || sdp->exclude) ? 0 : (sdp->exclude = 1)), res); |
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if (res) { retval = res; /* -ERESTARTSYS because signal hit process */ goto error_out; } } else if (sdp->exclude) { /* some other fd has an exclusive lock on dev */ if (flags & O_NONBLOCK) { retval = -EBUSY; goto error_out; } res = 0; __wait_event_interruptible(sdp->o_excl_wait, (!sdp->exclude), res); if (res) { retval = res; /* -ERESTARTSYS because signal hit process */ goto error_out; } } if (sdp->detached) { retval = -ENODEV; goto error_out; } |
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if (list_empty(&sdp->sfds)) { /* no existing opens on this device */ |
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sdp->sgdebug = 0; |
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q = sdp->device->request_queue; |
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sdp->sg_tablesize = queue_max_segments(q); |
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} if ((sfp = sg_add_sfp(sdp, dev))) filp->private_data = sfp; else { |
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if (flags & O_EXCL) { |
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sdp->exclude = 0; /* undo if error */ |
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wake_up_interruptible(&sdp->o_excl_wait); } |
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retval = -ENOMEM; goto error_out; } |
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retval = 0; error_out: |
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if (retval) { scsi_autopm_put_device(sdp->device); sdp_put: |
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scsi_device_put(sdp->device); |
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} |
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sg_put: if (sdp) sg_put_dev(sdp); |
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mutex_unlock(&sg_mutex); |
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return retval; } /* Following function was formerly called 'sg_close' */ static int sg_release(struct inode *inode, struct file *filp) { Sg_device *sdp; Sg_fd *sfp; if ((!(sfp = (Sg_fd *) filp->private_data)) || (!(sdp = sfp->parentdp))) return -ENXIO; SCSI_LOG_TIMEOUT(3, printk("sg_release: %s ", sdp->disk->disk_name)); |
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sfp->closed = 1; sdp->exclude = 0; wake_up_interruptible(&sdp->o_excl_wait); |
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scsi_autopm_put_device(sdp->device); |
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kref_put(&sfp->f_ref, sg_remove_sfp); |
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return 0; } static ssize_t sg_read(struct file *filp, char __user *buf, size_t count, loff_t * ppos) { |
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Sg_device *sdp; Sg_fd *sfp; Sg_request *srp; int req_pack_id = -1; |
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sg_io_hdr_t *hp; |
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struct sg_header *old_hdr = NULL; int retval = 0; |
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if ((!(sfp = (Sg_fd *) filp->private_data)) || (!(sdp = sfp->parentdp))) return -ENXIO; SCSI_LOG_TIMEOUT(3, printk("sg_read: %s, count=%d ", sdp->disk->disk_name, (int) count)); |
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|
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if (!access_ok(VERIFY_WRITE, buf, count)) return -EFAULT; if (sfp->force_packid && (count >= SZ_SG_HEADER)) { |
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old_hdr = kmalloc(SZ_SG_HEADER, GFP_KERNEL); if (!old_hdr) return -ENOMEM; if (__copy_from_user(old_hdr, buf, SZ_SG_HEADER)) { retval = -EFAULT; goto free_old_hdr; } if (old_hdr->reply_len < 0) { |
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if (count >= SZ_SG_IO_HDR) { |
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sg_io_hdr_t *new_hdr; new_hdr = kmalloc(SZ_SG_IO_HDR, GFP_KERNEL); if (!new_hdr) { retval = -ENOMEM; goto free_old_hdr; } retval =__copy_from_user (new_hdr, buf, SZ_SG_IO_HDR); req_pack_id = new_hdr->pack_id; kfree(new_hdr); if (retval) { retval = -EFAULT; goto free_old_hdr; } |
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} } else |
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req_pack_id = old_hdr->pack_id; |
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} srp = sg_get_rq_mark(sfp, req_pack_id); if (!srp) { /* now wait on packet to arrive */ |
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if (sdp->detached) { retval = -ENODEV; goto free_old_hdr; } if (filp->f_flags & O_NONBLOCK) { retval = -EAGAIN; goto free_old_hdr; } |
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while (1) { |
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retval = 0; /* following macro beats race condition */ |
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__wait_event_interruptible(sfp->read_wait, |
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(sdp->detached || (srp = sg_get_rq_mark(sfp, req_pack_id))), retval); if (sdp->detached) { retval = -ENODEV; goto free_old_hdr; } if (0 == retval) |
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break; |
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/* -ERESTARTSYS as signal hit process */ goto free_old_hdr; |
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} } |
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if (srp->header.interface_id != '\0') { retval = sg_new_read(sfp, buf, count, srp); goto free_old_hdr; } |
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hp = &srp->header; |
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if (old_hdr == NULL) { old_hdr = kmalloc(SZ_SG_HEADER, GFP_KERNEL); if (! old_hdr) { retval = -ENOMEM; goto free_old_hdr; } } memset(old_hdr, 0, SZ_SG_HEADER); old_hdr->reply_len = (int) hp->timeout; old_hdr->pack_len = old_hdr->reply_len; /* old, strange behaviour */ old_hdr->pack_id = hp->pack_id; old_hdr->twelve_byte = |
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((srp->data.cmd_opcode >= 0xc0) && (12 == hp->cmd_len)) ? 1 : 0; |
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old_hdr->target_status = hp->masked_status; old_hdr->host_status = hp->host_status; old_hdr->driver_status = hp->driver_status; |
1da177e4c Linux-2.6.12-rc2 |
431 432 |
if ((CHECK_CONDITION & hp->masked_status) || (DRIVER_SENSE & hp->driver_status)) |
cb59e8408 [PATCH] sg.c: update |
433 434 |
memcpy(old_hdr->sense_buffer, srp->sense_b, sizeof (old_hdr->sense_buffer)); |
1da177e4c Linux-2.6.12-rc2 |
435 436 437 438 439 440 |
switch (hp->host_status) { /* This setup of 'result' is for backward compatibility and is best ignored by the user who should use target, host + driver status */ case DID_OK: case DID_PASSTHROUGH: case DID_SOFT_ERROR: |
cb59e8408 [PATCH] sg.c: update |
441 |
old_hdr->result = 0; |
1da177e4c Linux-2.6.12-rc2 |
442 443 444 445 |
break; case DID_NO_CONNECT: case DID_BUS_BUSY: case DID_TIME_OUT: |
cb59e8408 [PATCH] sg.c: update |
446 |
old_hdr->result = EBUSY; |
1da177e4c Linux-2.6.12-rc2 |
447 448 449 450 451 452 |
break; case DID_BAD_TARGET: case DID_ABORT: case DID_PARITY: case DID_RESET: case DID_BAD_INTR: |
cb59e8408 [PATCH] sg.c: update |
453 |
old_hdr->result = EIO; |
1da177e4c Linux-2.6.12-rc2 |
454 455 |
break; case DID_ERROR: |
cb59e8408 [PATCH] sg.c: update |
456 |
old_hdr->result = (srp->sense_b[0] == 0 && |
1da177e4c Linux-2.6.12-rc2 |
457 458 459 |
hp->masked_status == GOOD) ? 0 : EIO; break; default: |
cb59e8408 [PATCH] sg.c: update |
460 |
old_hdr->result = EIO; |
1da177e4c Linux-2.6.12-rc2 |
461 462 463 464 465 |
break; } /* Now copy the result back to the user buffer. */ if (count >= SZ_SG_HEADER) { |
cb59e8408 [PATCH] sg.c: update |
466 467 468 469 |
if (__copy_to_user(buf, old_hdr, SZ_SG_HEADER)) { retval = -EFAULT; goto free_old_hdr; } |
1da177e4c Linux-2.6.12-rc2 |
470 |
buf += SZ_SG_HEADER; |
cb59e8408 [PATCH] sg.c: update |
471 472 |
if (count > old_hdr->reply_len) count = old_hdr->reply_len; |
1da177e4c Linux-2.6.12-rc2 |
473 |
if (count > SZ_SG_HEADER) { |
cb59e8408 [PATCH] sg.c: update |
474 475 476 477 |
if (sg_read_oxfer(srp, buf, count - SZ_SG_HEADER)) { retval = -EFAULT; goto free_old_hdr; } |
1da177e4c Linux-2.6.12-rc2 |
478 479 |
} } else |
cb59e8408 [PATCH] sg.c: update |
480 |
count = (old_hdr->result == 0) ? 0 : -EIO; |
1da177e4c Linux-2.6.12-rc2 |
481 |
sg_finish_rem_req(srp); |
cb59e8408 [PATCH] sg.c: update |
482 483 |
retval = count; free_old_hdr: |
c9475cb0c [PATCH] kfree cle... |
484 |
kfree(old_hdr); |
cb59e8408 [PATCH] sg.c: update |
485 |
return retval; |
1da177e4c Linux-2.6.12-rc2 |
486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 |
} static ssize_t sg_new_read(Sg_fd * sfp, char __user *buf, size_t count, Sg_request * srp) { sg_io_hdr_t *hp = &srp->header; int err = 0; int len; if (count < SZ_SG_IO_HDR) { err = -EINVAL; goto err_out; } hp->sb_len_wr = 0; if ((hp->mx_sb_len > 0) && hp->sbp) { if ((CHECK_CONDITION & hp->masked_status) || (DRIVER_SENSE & hp->driver_status)) { |
d6b10348f [SCSI] convert sg... |
503 |
int sb_len = SCSI_SENSE_BUFFERSIZE; |
1da177e4c Linux-2.6.12-rc2 |
504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 |
sb_len = (hp->mx_sb_len > sb_len) ? sb_len : hp->mx_sb_len; len = 8 + (int) srp->sense_b[7]; /* Additional sense length field */ len = (len > sb_len) ? sb_len : len; if (copy_to_user(hp->sbp, srp->sense_b, len)) { err = -EFAULT; goto err_out; } hp->sb_len_wr = len; } } if (hp->masked_status || hp->host_status || hp->driver_status) hp->info |= SG_INFO_CHECK; if (copy_to_user(buf, hp, SZ_SG_IO_HDR)) { err = -EFAULT; goto err_out; } |
0b6cb26c6 sg: remove sg_rea... |
520 |
err_out: |
e7ee4cc04 [SCSI] sg: return... |
521 |
err = sg_finish_rem_req(srp); |
1da177e4c Linux-2.6.12-rc2 |
522 523 524 525 526 527 528 529 530 531 532 533 534 535 |
return (0 == err) ? count : err; } static ssize_t sg_write(struct file *filp, const char __user *buf, size_t count, loff_t * ppos) { int mxsize, cmd_size, k; int input_size, blocking; unsigned char opcode; Sg_device *sdp; Sg_fd *sfp; Sg_request *srp; struct sg_header old_hdr; sg_io_hdr_t *hp; |
d6b10348f [SCSI] convert sg... |
536 |
unsigned char cmnd[MAX_COMMAND_SIZE]; |
1da177e4c Linux-2.6.12-rc2 |
537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 |
if ((!(sfp = (Sg_fd *) filp->private_data)) || (!(sdp = sfp->parentdp))) return -ENXIO; SCSI_LOG_TIMEOUT(3, printk("sg_write: %s, count=%d ", sdp->disk->disk_name, (int) count)); if (sdp->detached) return -ENODEV; if (!((filp->f_flags & O_NONBLOCK) || scsi_block_when_processing_errors(sdp->device))) return -ENXIO; if (!access_ok(VERIFY_READ, buf, count)) return -EFAULT; /* protects following copy_from_user()s + get_user()s */ if (count < SZ_SG_HEADER) return -EIO; if (__copy_from_user(&old_hdr, buf, SZ_SG_HEADER)) return -EFAULT; blocking = !(filp->f_flags & O_NONBLOCK); if (old_hdr.reply_len < 0) |
a2dd3b4ce [SCSI] sg: fix ra... |
557 558 |
return sg_new_write(sfp, filp, buf, count, blocking, 0, 0, NULL); |
1da177e4c Linux-2.6.12-rc2 |
559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 |
if (count < (SZ_SG_HEADER + 6)) return -EIO; /* The minimum scsi command length is 6 bytes. */ if (!(srp = sg_add_request(sfp))) { SCSI_LOG_TIMEOUT(1, printk("sg_write: queue full ")); return -EDOM; } buf += SZ_SG_HEADER; __get_user(opcode, buf); if (sfp->next_cmd_len > 0) { if (sfp->next_cmd_len > MAX_COMMAND_SIZE) { SCSI_LOG_TIMEOUT(1, printk("sg_write: command length too long ")); sfp->next_cmd_len = 0; sg_remove_request(sfp, srp); return -EIO; } cmd_size = sfp->next_cmd_len; sfp->next_cmd_len = 0; /* reset so only this write() effected */ } else { cmd_size = COMMAND_SIZE(opcode); /* based on SCSI command group */ if ((opcode >= 0xc0) && old_hdr.twelve_byte) cmd_size = 12; } SCSI_LOG_TIMEOUT(4, printk( "sg_write: scsi opcode=0x%02x, cmd_size=%d ", (int) opcode, cmd_size)); /* Determine buffer size. */ input_size = count - cmd_size; mxsize = (input_size > old_hdr.reply_len) ? input_size : old_hdr.reply_len; mxsize -= SZ_SG_HEADER; input_size -= SZ_SG_HEADER; if (input_size < 0) { sg_remove_request(sfp, srp); return -EIO; /* User did not pass enough bytes for this command. */ } hp = &srp->header; hp->interface_id = '\0'; /* indicator of old interface tunnelled */ hp->cmd_len = (unsigned char) cmd_size; hp->iovec_count = 0; hp->mx_sb_len = 0; if (input_size > 0) hp->dxfer_direction = (old_hdr.reply_len > SZ_SG_HEADER) ? SG_DXFER_TO_FROM_DEV : SG_DXFER_TO_DEV; else hp->dxfer_direction = (mxsize > 0) ? SG_DXFER_FROM_DEV : SG_DXFER_NONE; hp->dxfer_len = mxsize; |
fad7f01e6 sg: set dxferp to... |
607 608 609 610 |
if (hp->dxfer_direction == SG_DXFER_TO_DEV) hp->dxferp = (char __user *)buf + cmd_size; else hp->dxferp = NULL; |
1da177e4c Linux-2.6.12-rc2 |
611 612 613 614 615 616 617 618 619 620 621 622 |
hp->sbp = NULL; hp->timeout = old_hdr.reply_len; /* structure abuse ... */ hp->flags = input_size; /* structure abuse ... */ hp->pack_id = old_hdr.pack_id; hp->usr_ptr = NULL; if (__copy_from_user(cmnd, buf, cmd_size)) return -EFAULT; /* * SG_DXFER_TO_FROM_DEV is functionally equivalent to SG_DXFER_FROM_DEV, * but is is possible that the app intended SG_DXFER_TO_DEV, because there * is a non-zero input_size, so emit a warning. */ |
eaa3e22e8 [SCSI] sg: Only p... |
623 624 |
if (hp->dxfer_direction == SG_DXFER_TO_FROM_DEV) { static char cmd[TASK_COMM_LEN]; |
2fe038e33 scsi/sg: use prin... |
625 626 627 628 629 630 631 632 633 634 635 |
if (strcmp(current->comm, cmd)) { printk_ratelimited(KERN_WARNING "sg_write: data in/out %d/%d bytes " "for SCSI command 0x%x-- guessing " "data in; program %s not setting " "count and/or reply_len properly ", old_hdr.reply_len - (int)SZ_SG_HEADER, input_size, (unsigned int) cmnd[0], current->comm); |
eaa3e22e8 [SCSI] sg: Only p... |
636 637 638 |
strcpy(cmd, current->comm); } } |
1da177e4c Linux-2.6.12-rc2 |
639 640 641 642 643 |
k = sg_common_write(sfp, srp, cmnd, sfp->timeout, blocking); return (k < 0) ? k : count; } static ssize_t |
0b07de85a allow userspace t... |
644 |
sg_new_write(Sg_fd *sfp, struct file *file, const char __user *buf, |
a2dd3b4ce [SCSI] sg: fix ra... |
645 |
size_t count, int blocking, int read_only, int sg_io_owned, |
0b07de85a allow userspace t... |
646 |
Sg_request **o_srp) |
1da177e4c Linux-2.6.12-rc2 |
647 648 649 650 |
{ int k; Sg_request *srp; sg_io_hdr_t *hp; |
d6b10348f [SCSI] convert sg... |
651 |
unsigned char cmnd[MAX_COMMAND_SIZE]; |
1da177e4c Linux-2.6.12-rc2 |
652 653 654 655 656 657 658 659 660 661 662 663 664 665 |
int timeout; unsigned long ul_timeout; if (count < SZ_SG_IO_HDR) return -EINVAL; if (!access_ok(VERIFY_READ, buf, count)) return -EFAULT; /* protects following copy_from_user()s + get_user()s */ sfp->cmd_q = 1; /* when sg_io_hdr seen, set command queuing on */ if (!(srp = sg_add_request(sfp))) { SCSI_LOG_TIMEOUT(1, printk("sg_new_write: queue full ")); return -EDOM; } |
a2dd3b4ce [SCSI] sg: fix ra... |
666 |
srp->sg_io_owned = sg_io_owned; |
1da177e4c Linux-2.6.12-rc2 |
667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 |
hp = &srp->header; if (__copy_from_user(hp, buf, SZ_SG_IO_HDR)) { sg_remove_request(sfp, srp); return -EFAULT; } if (hp->interface_id != 'S') { sg_remove_request(sfp, srp); return -ENOSYS; } if (hp->flags & SG_FLAG_MMAP_IO) { if (hp->dxfer_len > sfp->reserve.bufflen) { sg_remove_request(sfp, srp); return -ENOMEM; /* MMAP_IO size must fit in reserve buffer */ } if (hp->flags & SG_FLAG_DIRECT_IO) { sg_remove_request(sfp, srp); return -EINVAL; /* either MMAP_IO or DIRECT_IO (not both) */ } if (sg_res_in_use(sfp)) { sg_remove_request(sfp, srp); return -EBUSY; /* reserve buffer already being used */ } } ul_timeout = msecs_to_jiffies(srp->header.timeout); timeout = (ul_timeout < INT_MAX) ? ul_timeout : INT_MAX; if ((!hp->cmdp) || (hp->cmd_len < 6) || (hp->cmd_len > sizeof (cmnd))) { sg_remove_request(sfp, srp); return -EMSGSIZE; } if (!access_ok(VERIFY_READ, hp->cmdp, hp->cmd_len)) { sg_remove_request(sfp, srp); return -EFAULT; /* protects following copy_from_user()s + get_user()s */ } if (__copy_from_user(cmnd, hp->cmdp, hp->cmd_len)) { sg_remove_request(sfp, srp); return -EFAULT; } |
14e507b85 sg: restore comma... |
704 |
if (read_only && sg_allow_access(file, cmnd)) { |
1da177e4c Linux-2.6.12-rc2 |
705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 |
sg_remove_request(sfp, srp); return -EPERM; } k = sg_common_write(sfp, srp, cmnd, timeout, blocking); if (k < 0) return k; if (o_srp) *o_srp = srp; return count; } static int sg_common_write(Sg_fd * sfp, Sg_request * srp, unsigned char *cmnd, int timeout, int blocking) { |
d6b10348f [SCSI] convert sg... |
720 |
int k, data_dir; |
1da177e4c Linux-2.6.12-rc2 |
721 722 |
Sg_device *sdp = sfp->parentdp; sg_io_hdr_t *hp = &srp->header; |
1da177e4c Linux-2.6.12-rc2 |
723 724 725 726 727 728 729 730 731 732 733 734 |
srp->data.cmd_opcode = cmnd[0]; /* hold opcode of command */ hp->status = 0; hp->masked_status = 0; hp->msg_status = 0; hp->info = 0; hp->host_status = 0; hp->driver_status = 0; hp->resid = 0; SCSI_LOG_TIMEOUT(4, printk("sg_common_write: scsi opcode=0x%02x, cmd_size=%d ", (int) cmnd[0], (int) hp->cmd_len)); |
10865dfa3 sg: convert the n... |
735 736 |
k = sg_start_req(srp, cmnd); if (k) { |
7ca63cb47 [SCSI] sg: fix in... |
737 738 |
SCSI_LOG_TIMEOUT(1, printk("sg_common_write: start_req err=%d ", k)); |
1da177e4c Linux-2.6.12-rc2 |
739 740 741 |
sg_finish_rem_req(srp); return k; /* probably out of space --> ENOMEM */ } |
1da177e4c Linux-2.6.12-rc2 |
742 |
if (sdp->detached) { |
caf19d386 [SCSI] sg: fix bi... |
743 744 |
if (srp->bio) blk_end_request_all(srp->rq, -EIO); |
1da177e4c Linux-2.6.12-rc2 |
745 746 747 |
sg_finish_rem_req(srp); return -ENODEV; } |
1da177e4c Linux-2.6.12-rc2 |
748 |
|
1da177e4c Linux-2.6.12-rc2 |
749 750 751 |
switch (hp->dxfer_direction) { case SG_DXFER_TO_FROM_DEV: case SG_DXFER_FROM_DEV: |
d6b10348f [SCSI] convert sg... |
752 |
data_dir = DMA_FROM_DEVICE; |
1da177e4c Linux-2.6.12-rc2 |
753 754 |
break; case SG_DXFER_TO_DEV: |
d6b10348f [SCSI] convert sg... |
755 |
data_dir = DMA_TO_DEVICE; |
1da177e4c Linux-2.6.12-rc2 |
756 757 |
break; case SG_DXFER_UNKNOWN: |
d6b10348f [SCSI] convert sg... |
758 |
data_dir = DMA_BIDIRECTIONAL; |
1da177e4c Linux-2.6.12-rc2 |
759 760 |
break; default: |
d6b10348f [SCSI] convert sg... |
761 |
data_dir = DMA_NONE; |
1da177e4c Linux-2.6.12-rc2 |
762 763 |
break; } |
cb59e8408 [PATCH] sg.c: update |
764 |
hp->duration = jiffies_to_msecs(jiffies); |
10db10d14 sg: convert the i... |
765 766 |
srp->rq->timeout = timeout; |
c6517b794 [SCSI] sg: fix ra... |
767 |
kref_get(&sfp->f_ref); /* sg_rq_end_io() does kref_put(). */ |
10db10d14 sg: convert the i... |
768 769 770 |
blk_execute_rq_nowait(sdp->device->request_queue, sdp->disk, srp->rq, 1, sg_rq_end_io); return 0; |
1da177e4c Linux-2.6.12-rc2 |
771 772 773 |
} static int |
f4927c45b scsi: Push down B... |
774 |
sg_ioctl(struct file *filp, unsigned int cmd_in, unsigned long arg) |
1da177e4c Linux-2.6.12-rc2 |
775 776 777 778 779 780 781 782 783 784 785 |
{ void __user *p = (void __user *)arg; int __user *ip = p; int result, val, read_only; Sg_device *sdp; Sg_fd *sfp; Sg_request *srp; unsigned long iflags; if ((!(sfp = (Sg_fd *) filp->private_data)) || (!(sdp = sfp->parentdp))) return -ENXIO; |
abf543937 block: move cmdfi... |
786 |
|
1da177e4c Linux-2.6.12-rc2 |
787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 |
SCSI_LOG_TIMEOUT(3, printk("sg_ioctl: %s, cmd=0x%x ", sdp->disk->disk_name, (int) cmd_in)); read_only = (O_RDWR != (filp->f_flags & O_ACCMODE)); switch (cmd_in) { case SG_IO: { int blocking = 1; /* ignore O_NONBLOCK flag */ if (sdp->detached) return -ENODEV; if (!scsi_block_when_processing_errors(sdp->device)) return -ENXIO; if (!access_ok(VERIFY_WRITE, p, SZ_SG_IO_HDR)) return -EFAULT; result = |
0b07de85a allow userspace t... |
804 |
sg_new_write(sfp, filp, p, SZ_SG_IO_HDR, |
a2dd3b4ce [SCSI] sg: fix ra... |
805 |
blocking, read_only, 1, &srp); |
1da177e4c Linux-2.6.12-rc2 |
806 807 |
if (result < 0) return result; |
1da177e4c Linux-2.6.12-rc2 |
808 809 810 |
while (1) { result = 0; /* following macro to beat race condition */ __wait_event_interruptible(sfp->read_wait, |
a2dd3b4ce [SCSI] sg: fix ra... |
811 812 |
(srp->done || sdp->detached), result); |
1da177e4c Linux-2.6.12-rc2 |
813 814 |
if (sdp->detached) return -ENODEV; |
a2dd3b4ce [SCSI] sg: fix ra... |
815 816 817 818 |
write_lock_irq(&sfp->rq_list_lock); if (srp->done) { srp->done = 2; write_unlock_irq(&sfp->rq_list_lock); |
1da177e4c Linux-2.6.12-rc2 |
819 |
break; |
a2dd3b4ce [SCSI] sg: fix ra... |
820 |
} |
1da177e4c Linux-2.6.12-rc2 |
821 |
srp->orphan = 1; |
a2dd3b4ce [SCSI] sg: fix ra... |
822 |
write_unlock_irq(&sfp->rq_list_lock); |
1da177e4c Linux-2.6.12-rc2 |
823 824 |
return result; /* -ERESTARTSYS because signal hit process */ } |
1da177e4c Linux-2.6.12-rc2 |
825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 |
result = sg_new_read(sfp, p, SZ_SG_IO_HDR, srp); return (result < 0) ? result : 0; } case SG_SET_TIMEOUT: result = get_user(val, ip); if (result) return result; if (val < 0) return -EIO; if (val >= MULDIV (INT_MAX, USER_HZ, HZ)) val = MULDIV (INT_MAX, USER_HZ, HZ); sfp->timeout_user = val; sfp->timeout = MULDIV (val, HZ, USER_HZ); return 0; case SG_GET_TIMEOUT: /* N.B. User receives timeout as return value */ /* strange ..., for backward compatibility */ return sfp->timeout_user; case SG_SET_FORCE_LOW_DMA: result = get_user(val, ip); if (result) return result; if (val) { sfp->low_dma = 1; if ((0 == sfp->low_dma) && (0 == sg_res_in_use(sfp))) { val = (int) sfp->reserve.bufflen; sg_remove_scat(&sfp->reserve); sg_build_reserve(sfp, val); } } else { if (sdp->detached) return -ENODEV; sfp->low_dma = sdp->device->host->unchecked_isa_dma; } return 0; case SG_GET_LOW_DMA: return put_user((int) sfp->low_dma, ip); case SG_GET_SCSI_ID: if (!access_ok(VERIFY_WRITE, p, sizeof (sg_scsi_id_t))) return -EFAULT; else { sg_scsi_id_t __user *sg_idp = p; if (sdp->detached) return -ENODEV; __put_user((int) sdp->device->host->host_no, &sg_idp->host_no); __put_user((int) sdp->device->channel, &sg_idp->channel); __put_user((int) sdp->device->id, &sg_idp->scsi_id); __put_user((int) sdp->device->lun, &sg_idp->lun); __put_user((int) sdp->device->type, &sg_idp->scsi_type); __put_user((short) sdp->device->host->cmd_per_lun, &sg_idp->h_cmd_per_lun); __put_user((short) sdp->device->queue_depth, &sg_idp->d_queue_depth); __put_user(0, &sg_idp->unused[0]); __put_user(0, &sg_idp->unused[1]); return 0; } case SG_SET_FORCE_PACK_ID: result = get_user(val, ip); if (result) return result; sfp->force_packid = val ? 1 : 0; return 0; case SG_GET_PACK_ID: if (!access_ok(VERIFY_WRITE, ip, sizeof (int))) return -EFAULT; read_lock_irqsave(&sfp->rq_list_lock, iflags); for (srp = sfp->headrp; srp; srp = srp->nextrp) { if ((1 == srp->done) && (!srp->sg_io_owned)) { read_unlock_irqrestore(&sfp->rq_list_lock, iflags); __put_user(srp->header.pack_id, ip); return 0; } } read_unlock_irqrestore(&sfp->rq_list_lock, iflags); __put_user(-1, ip); return 0; case SG_GET_NUM_WAITING: read_lock_irqsave(&sfp->rq_list_lock, iflags); for (val = 0, srp = sfp->headrp; srp; srp = srp->nextrp) { if ((1 == srp->done) && (!srp->sg_io_owned)) ++val; } read_unlock_irqrestore(&sfp->rq_list_lock, iflags); return put_user(val, ip); case SG_GET_SG_TABLESIZE: return put_user(sdp->sg_tablesize, ip); case SG_SET_RESERVED_SIZE: result = get_user(val, ip); if (result) return result; if (val < 0) return -EINVAL; |
44ec95425 [SCSI] sg: cap re... |
922 |
val = min_t(int, val, |
ae03bf639 block: Use access... |
923 |
queue_max_sectors(sdp->device->request_queue) * 512); |
1da177e4c Linux-2.6.12-rc2 |
924 925 926 927 928 929 930 931 |
if (val != sfp->reserve.bufflen) { if (sg_res_in_use(sfp) || sfp->mmap_called) return -EBUSY; sg_remove_scat(&sfp->reserve); sg_build_reserve(sfp, val); } return 0; case SG_GET_RESERVED_SIZE: |
44ec95425 [SCSI] sg: cap re... |
932 |
val = min_t(int, sfp->reserve.bufflen, |
ae03bf639 block: Use access... |
933 |
queue_max_sectors(sdp->device->request_queue) * 512); |
1da177e4c Linux-2.6.12-rc2 |
934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 |
return put_user(val, ip); case SG_SET_COMMAND_Q: result = get_user(val, ip); if (result) return result; sfp->cmd_q = val ? 1 : 0; return 0; case SG_GET_COMMAND_Q: return put_user((int) sfp->cmd_q, ip); case SG_SET_KEEP_ORPHAN: result = get_user(val, ip); if (result) return result; sfp->keep_orphan = val; return 0; case SG_GET_KEEP_ORPHAN: return put_user((int) sfp->keep_orphan, ip); case SG_NEXT_CMD_LEN: result = get_user(val, ip); if (result) return result; sfp->next_cmd_len = (val > 0) ? val : 0; return 0; case SG_GET_VERSION_NUM: return put_user(sg_version_num, ip); case SG_GET_ACCESS_COUNT: /* faked - we don't have a real access count anymore */ val = (sdp->device ? 1 : 0); return put_user(val, ip); case SG_GET_REQUEST_TABLE: if (!access_ok(VERIFY_WRITE, p, SZ_SG_REQ_INFO * SG_MAX_QUEUE)) return -EFAULT; else { |
cb59e8408 [PATCH] sg.c: update |
967 968 969 970 971 972 973 |
sg_req_info_t *rinfo; unsigned int ms; rinfo = kmalloc(SZ_SG_REQ_INFO * SG_MAX_QUEUE, GFP_KERNEL); if (!rinfo) return -ENOMEM; |
1da177e4c Linux-2.6.12-rc2 |
974 975 976 977 978 979 980 981 982 983 |
read_lock_irqsave(&sfp->rq_list_lock, iflags); for (srp = sfp->headrp, val = 0; val < SG_MAX_QUEUE; ++val, srp = srp ? srp->nextrp : srp) { memset(&rinfo[val], 0, SZ_SG_REQ_INFO); if (srp) { rinfo[val].req_state = srp->done + 1; rinfo[val].problem = srp->header.masked_status & srp->header.host_status & srp->header.driver_status; |
cb59e8408 [PATCH] sg.c: update |
984 985 986 987 988 989 990 991 992 |
if (srp->done) rinfo[val].duration = srp->header.duration; else { ms = jiffies_to_msecs(jiffies); rinfo[val].duration = (ms > srp->header.duration) ? (ms - srp->header.duration) : 0; } |
1da177e4c Linux-2.6.12-rc2 |
993 |
rinfo[val].orphan = srp->orphan; |
cb59e8408 [PATCH] sg.c: update |
994 995 996 997 998 999 |
rinfo[val].sg_io_owned = srp->sg_io_owned; rinfo[val].pack_id = srp->header.pack_id; rinfo[val].usr_ptr = srp->header.usr_ptr; |
1da177e4c Linux-2.6.12-rc2 |
1000 1001 1002 |
} } read_unlock_irqrestore(&sfp->rq_list_lock, iflags); |
cb59e8408 [PATCH] sg.c: update |
1003 1004 1005 1006 1007 |
result = __copy_to_user(p, rinfo, SZ_SG_REQ_INFO * SG_MAX_QUEUE); result = result ? -EFAULT : 0; kfree(rinfo); return result; |
1da177e4c Linux-2.6.12-rc2 |
1008 1009 1010 1011 1012 1013 1014 1015 1016 |
} case SG_EMULATED_HOST: if (sdp->detached) return -ENODEV; return put_user(sdp->device->host->hostt->emulated, ip); case SG_SCSI_RESET: if (sdp->detached) return -ENODEV; if (filp->f_flags & O_NONBLOCK) { |
939647ee3 [SCSI] fix oops o... |
1017 |
if (scsi_host_in_recovery(sdp->device->host)) |
1da177e4c Linux-2.6.12-rc2 |
1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 |
return -EBUSY; } else if (!scsi_block_when_processing_errors(sdp->device)) return -EBUSY; result = get_user(val, ip); if (result) return result; if (SG_SCSI_RESET_NOTHING == val) return 0; switch (val) { case SG_SCSI_RESET_DEVICE: val = SCSI_TRY_RESET_DEVICE; break; |
39120e117 [SCSI] sg: Add ta... |
1030 1031 1032 |
case SG_SCSI_RESET_TARGET: val = SCSI_TRY_RESET_TARGET; break; |
1da177e4c Linux-2.6.12-rc2 |
1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 |
case SG_SCSI_RESET_BUS: val = SCSI_TRY_RESET_BUS; break; case SG_SCSI_RESET_HOST: val = SCSI_TRY_RESET_HOST; break; default: return -EINVAL; } if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) return -EACCES; return (scsi_reset_provider(sdp->device, val) == SUCCESS) ? 0 : -EIO; case SCSI_IOCTL_SEND_COMMAND: if (sdp->detached) return -ENODEV; if (read_only) { unsigned char opcode = WRITE_6; Scsi_Ioctl_Command __user *siocp = p; if (copy_from_user(&opcode, siocp->data, 1)) return -EFAULT; |
14e507b85 sg: restore comma... |
1055 |
if (sg_allow_access(filp, &opcode)) |
1da177e4c Linux-2.6.12-rc2 |
1056 1057 |
return -EPERM; } |
e915e872e [PATCH] switch sg... |
1058 |
return sg_scsi_ioctl(sdp->device->request_queue, NULL, filp->f_mode, p); |
1da177e4c Linux-2.6.12-rc2 |
1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 |
case SG_SET_DEBUG: result = get_user(val, ip); if (result) return result; sdp->sgdebug = (char) val; return 0; case SCSI_IOCTL_GET_IDLUN: case SCSI_IOCTL_GET_BUS_NUMBER: case SCSI_IOCTL_PROBE_HOST: case SG_GET_TRANSFORM: if (sdp->detached) return -ENODEV; return scsi_ioctl(sdp->device, cmd_in, p); |
44ec95425 [SCSI] sg: cap re... |
1072 |
case BLKSECTGET: |
ae03bf639 block: Use access... |
1073 |
return put_user(queue_max_sectors(sdp->device->request_queue) * 512, |
44ec95425 [SCSI] sg: cap re... |
1074 |
ip); |
6da127ad0 blktrace: Add blk... |
1075 1076 1077 |
case BLKTRACESETUP: return blk_trace_setup(sdp->device->request_queue, sdp->disk->disk_name, |
76e3a19d0 [SCSI] sg: fix de... |
1078 |
MKDEV(SCSI_GENERIC_MAJOR, sdp->index), |
d0deef5b1 blktrace: support... |
1079 |
NULL, |
6da127ad0 blktrace: Add blk... |
1080 1081 1082 1083 1084 1085 1086 |
(char *)arg); case BLKTRACESTART: return blk_trace_startstop(sdp->device->request_queue, 1); case BLKTRACESTOP: return blk_trace_startstop(sdp->device->request_queue, 0); case BLKTRACETEARDOWN: return blk_trace_remove(sdp->device->request_queue); |
1da177e4c Linux-2.6.12-rc2 |
1087 1088 1089 1090 1091 1092 |
default: if (read_only) return -EPERM; /* don't know so take safe approach */ return scsi_ioctl(sdp->device, cmd_in, p); } } |
f4927c45b scsi: Push down B... |
1093 1094 1095 1096 |
static long sg_unlocked_ioctl(struct file *filp, unsigned int cmd_in, unsigned long arg) { int ret; |
c45d15d24 scsi: autoconvert... |
1097 |
mutex_lock(&sg_mutex); |
f4927c45b scsi: Push down B... |
1098 |
ret = sg_ioctl(filp, cmd_in, arg); |
c45d15d24 scsi: autoconvert... |
1099 |
mutex_unlock(&sg_mutex); |
f4927c45b scsi: Push down B... |
1100 1101 1102 |
return ret; } |
1da177e4c Linux-2.6.12-rc2 |
1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 |
#ifdef CONFIG_COMPAT static long sg_compat_ioctl(struct file *filp, unsigned int cmd_in, unsigned long arg) { Sg_device *sdp; Sg_fd *sfp; struct scsi_device *sdev; if ((!(sfp = (Sg_fd *) filp->private_data)) || (!(sdp = sfp->parentdp))) return -ENXIO; sdev = sdp->device; if (sdev->host->hostt->compat_ioctl) { int ret; ret = sdev->host->hostt->compat_ioctl(sdev, cmd_in, (void __user *)arg); return ret; } return -ENOIOCTLCMD; } #endif static unsigned int sg_poll(struct file *filp, poll_table * wait) { unsigned int res = 0; Sg_device *sdp; Sg_fd *sfp; Sg_request *srp; int count = 0; unsigned long iflags; if ((!(sfp = (Sg_fd *) filp->private_data)) || (!(sdp = sfp->parentdp)) || sfp->closed) return POLLERR; poll_wait(filp, &sfp->read_wait, wait); read_lock_irqsave(&sfp->rq_list_lock, iflags); for (srp = sfp->headrp; srp; srp = srp->nextrp) { /* if any read waiting, flag it */ if ((0 == res) && (1 == srp->done) && (!srp->sg_io_owned)) res = POLLIN | POLLRDNORM; ++count; } read_unlock_irqrestore(&sfp->rq_list_lock, iflags); if (sdp->detached) res |= POLLHUP; else if (!sfp->cmd_q) { if (0 == count) res |= POLLOUT | POLLWRNORM; } else if (count < SG_MAX_QUEUE) res |= POLLOUT | POLLWRNORM; SCSI_LOG_TIMEOUT(3, printk("sg_poll: %s, res=0x%x ", sdp->disk->disk_name, (int) res)); return res; } static int sg_fasync(int fd, struct file *filp, int mode) { |
1da177e4c Linux-2.6.12-rc2 |
1165 1166 1167 1168 1169 1170 1171 1172 |
Sg_device *sdp; Sg_fd *sfp; if ((!(sfp = (Sg_fd *) filp->private_data)) || (!(sdp = sfp->parentdp))) return -ENXIO; SCSI_LOG_TIMEOUT(3, printk("sg_fasync: %s, mode=%d ", sdp->disk->disk_name, mode)); |
60aa49243 Rationalize fasyn... |
1173 |
return fasync_helper(fd, filp, mode, &sfp->async_qp); |
1da177e4c Linux-2.6.12-rc2 |
1174 |
} |
a13ff0bb3 Convert SG from n... |
1175 1176 |
static int sg_vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
1da177e4c Linux-2.6.12-rc2 |
1177 1178 |
{ Sg_fd *sfp; |
d6b10348f [SCSI] convert sg... |
1179 |
unsigned long offset, len, sa; |
1da177e4c Linux-2.6.12-rc2 |
1180 |
Sg_scatter_hold *rsv_schp; |
10db10d14 sg: convert the i... |
1181 |
int k, length; |
1da177e4c Linux-2.6.12-rc2 |
1182 1183 |
if ((NULL == vma) || (!(sfp = (Sg_fd *) vma->vm_private_data))) |
a13ff0bb3 Convert SG from n... |
1184 |
return VM_FAULT_SIGBUS; |
1da177e4c Linux-2.6.12-rc2 |
1185 |
rsv_schp = &sfp->reserve; |
a13ff0bb3 Convert SG from n... |
1186 |
offset = vmf->pgoff << PAGE_SHIFT; |
1da177e4c Linux-2.6.12-rc2 |
1187 |
if (offset >= rsv_schp->bufflen) |
a13ff0bb3 Convert SG from n... |
1188 1189 1190 |
return VM_FAULT_SIGBUS; SCSI_LOG_TIMEOUT(3, printk("sg_vma_fault: offset=%lu, scatg=%d ", |
1da177e4c Linux-2.6.12-rc2 |
1191 |
offset, rsv_schp->k_use_sg)); |
d6b10348f [SCSI] convert sg... |
1192 |
sa = vma->vm_start; |
10db10d14 sg: convert the i... |
1193 1194 |
length = 1 << (PAGE_SHIFT + rsv_schp->page_order); for (k = 0; k < rsv_schp->k_use_sg && sa < vma->vm_end; k++) { |
d6b10348f [SCSI] convert sg... |
1195 |
len = vma->vm_end - sa; |
10db10d14 sg: convert the i... |
1196 |
len = (len < length) ? len : length; |
d6b10348f [SCSI] convert sg... |
1197 |
if (offset < len) { |
10db10d14 sg: convert the i... |
1198 1199 |
struct page *page = nth_page(rsv_schp->pages[k], offset >> PAGE_SHIFT); |
d6b10348f [SCSI] convert sg... |
1200 |
get_page(page); /* increment page count */ |
a13ff0bb3 Convert SG from n... |
1201 1202 |
vmf->page = page; return 0; /* success */ |
1da177e4c Linux-2.6.12-rc2 |
1203 |
} |
d6b10348f [SCSI] convert sg... |
1204 1205 |
sa += len; offset -= len; |
1da177e4c Linux-2.6.12-rc2 |
1206 |
} |
d6b10348f [SCSI] convert sg... |
1207 |
|
a13ff0bb3 Convert SG from n... |
1208 |
return VM_FAULT_SIGBUS; |
1da177e4c Linux-2.6.12-rc2 |
1209 |
} |
f0f37e2f7 const: mark struc... |
1210 |
static const struct vm_operations_struct sg_mmap_vm_ops = { |
a13ff0bb3 Convert SG from n... |
1211 |
.fault = sg_vma_fault, |
1da177e4c Linux-2.6.12-rc2 |
1212 1213 1214 1215 1216 1217 |
}; static int sg_mmap(struct file *filp, struct vm_area_struct *vma) { Sg_fd *sfp; |
d6b10348f [SCSI] convert sg... |
1218 |
unsigned long req_sz, len, sa; |
1da177e4c Linux-2.6.12-rc2 |
1219 |
Sg_scatter_hold *rsv_schp; |
10db10d14 sg: convert the i... |
1220 |
int k, length; |
1da177e4c Linux-2.6.12-rc2 |
1221 1222 1223 |
if ((!filp) || (!vma) || (!(sfp = (Sg_fd *) filp->private_data))) return -ENXIO; |
cb59e8408 [PATCH] sg.c: update |
1224 |
req_sz = vma->vm_end - vma->vm_start; |
1da177e4c Linux-2.6.12-rc2 |
1225 1226 1227 1228 1229 1230 1231 1232 |
SCSI_LOG_TIMEOUT(3, printk("sg_mmap starting, vm_start=%p, len=%d ", (void *) vma->vm_start, (int) req_sz)); if (vma->vm_pgoff) return -EINVAL; /* want no offset */ rsv_schp = &sfp->reserve; if (req_sz > rsv_schp->bufflen) return -ENOMEM; /* cannot map more than reserved buffer */ |
d6b10348f [SCSI] convert sg... |
1233 |
sa = vma->vm_start; |
10db10d14 sg: convert the i... |
1234 1235 |
length = 1 << (PAGE_SHIFT + rsv_schp->page_order); for (k = 0; k < rsv_schp->k_use_sg && sa < vma->vm_end; k++) { |
d6b10348f [SCSI] convert sg... |
1236 |
len = vma->vm_end - sa; |
10db10d14 sg: convert the i... |
1237 |
len = (len < length) ? len : length; |
d6b10348f [SCSI] convert sg... |
1238 |
sa += len; |
1da177e4c Linux-2.6.12-rc2 |
1239 |
} |
d6b10348f [SCSI] convert sg... |
1240 |
|
f9aed0e25 [PATCH] sg: use c... |
1241 |
sfp->mmap_called = 1; |
1c8e71d72 [SCSI] sg: do not... |
1242 |
vma->vm_flags |= VM_RESERVED; |
1da177e4c Linux-2.6.12-rc2 |
1243 1244 1245 1246 |
vma->vm_private_data = sfp; vma->vm_ops = &sg_mmap_vm_ops; return 0; } |
c96952ed7 [SCSI] sg: avoid ... |
1247 1248 1249 1250 1251 1252 1253 1254 |
static void sg_rq_end_io_usercontext(struct work_struct *work) { struct sg_request *srp = container_of(work, struct sg_request, ew.work); struct sg_fd *sfp = srp->parentfp; sg_finish_rem_req(srp); kref_put(&sfp->f_ref, sg_remove_sfp); } |
a91a3a20e sg: rename sg_cmd... |
1255 1256 1257 1258 1259 |
/* * This function is a "bottom half" handler that is called by the mid * level when a command is completed (or has failed). */ static void sg_rq_end_io(struct request *rq, int uptodate) |
1da177e4c Linux-2.6.12-rc2 |
1260 |
{ |
a91a3a20e sg: rename sg_cmd... |
1261 |
struct sg_request *srp = rq->end_io_data; |
c6517b794 [SCSI] sg: fix ra... |
1262 |
Sg_device *sdp; |
1da177e4c Linux-2.6.12-rc2 |
1263 |
Sg_fd *sfp; |
1da177e4c Linux-2.6.12-rc2 |
1264 |
unsigned long iflags; |
cb59e8408 [PATCH] sg.c: update |
1265 |
unsigned int ms; |
a91a3a20e sg: rename sg_cmd... |
1266 |
char *sense; |
c6517b794 [SCSI] sg: fix ra... |
1267 |
int result, resid, done = 1; |
1da177e4c Linux-2.6.12-rc2 |
1268 |
|
c6517b794 [SCSI] sg: fix ra... |
1269 |
if (WARN_ON(srp->done != 0)) |
1da177e4c Linux-2.6.12-rc2 |
1270 |
return; |
c6517b794 [SCSI] sg: fix ra... |
1271 |
|
1da177e4c Linux-2.6.12-rc2 |
1272 |
sfp = srp->parentfp; |
c6517b794 [SCSI] sg: fix ra... |
1273 |
if (WARN_ON(sfp == NULL)) |
1da177e4c Linux-2.6.12-rc2 |
1274 |
return; |
c6517b794 [SCSI] sg: fix ra... |
1275 1276 1277 1278 1279 |
sdp = sfp->parentdp; if (unlikely(sdp->detached)) printk(KERN_INFO "sg_rq_end_io: device detached "); |
1da177e4c Linux-2.6.12-rc2 |
1280 |
|
a91a3a20e sg: rename sg_cmd... |
1281 1282 |
sense = rq->sense; result = rq->errors; |
c3a4d78c5 block: add rq->re... |
1283 |
resid = rq->resid_len; |
1da177e4c Linux-2.6.12-rc2 |
1284 1285 1286 |
SCSI_LOG_TIMEOUT(4, printk("sg_cmd_done: %s, pack_id=%d, res=0x%x ", |
d6b10348f [SCSI] convert sg... |
1287 1288 |
sdp->disk->disk_name, srp->header.pack_id, result)); srp->header.resid = resid; |
cb59e8408 [PATCH] sg.c: update |
1289 1290 1291 |
ms = jiffies_to_msecs(jiffies); srp->header.duration = (ms > srp->header.duration) ? (ms - srp->header.duration) : 0; |
d6b10348f [SCSI] convert sg... |
1292 |
if (0 != result) { |
1da177e4c Linux-2.6.12-rc2 |
1293 |
struct scsi_sense_hdr sshdr; |
d6b10348f [SCSI] convert sg... |
1294 1295 1296 1297 1298 |
srp->header.status = 0xff & result; srp->header.masked_status = status_byte(result); srp->header.msg_status = msg_byte(result); srp->header.host_status = host_byte(result); srp->header.driver_status = driver_byte(result); |
1da177e4c Linux-2.6.12-rc2 |
1299 1300 1301 |
if ((sdp->sgdebug > 0) && ((CHECK_CONDITION == srp->header.masked_status) || (COMMAND_TERMINATED == srp->header.masked_status))) |
d6b10348f [SCSI] convert sg... |
1302 1303 |
__scsi_print_sense("sg_cmd_done", sense, SCSI_SENSE_BUFFERSIZE); |
1da177e4c Linux-2.6.12-rc2 |
1304 1305 |
/* Following if statement is a patch supplied by Eric Youngdale */ |
d6b10348f [SCSI] convert sg... |
1306 1307 |
if (driver_byte(result) != 0 && scsi_normalize_sense(sense, SCSI_SENSE_BUFFERSIZE, &sshdr) |
1da177e4c Linux-2.6.12-rc2 |
1308 1309 1310 1311 1312 1313 1314 1315 1316 |
&& !scsi_sense_is_deferred(&sshdr) && sshdr.sense_key == UNIT_ATTENTION && sdp->device->removable) { /* Detected possible disc change. Set the bit - this */ /* may be used if there are filesystems using this device */ sdp->device->changed = 1; } } /* Rely on write phase to clean out srp status values, so no "else" */ |
c6517b794 [SCSI] sg: fix ra... |
1317 1318 |
write_lock_irqsave(&sfp->rq_list_lock, iflags); if (unlikely(srp->orphan)) { |
1da177e4c Linux-2.6.12-rc2 |
1319 1320 |
if (sfp->keep_orphan) srp->sg_io_owned = 0; |
c6517b794 [SCSI] sg: fix ra... |
1321 1322 |
else done = 0; |
1da177e4c Linux-2.6.12-rc2 |
1323 |
} |
c6517b794 [SCSI] sg: fix ra... |
1324 1325 1326 1327 1328 1329 1330 |
srp->done = done; write_unlock_irqrestore(&sfp->rq_list_lock, iflags); if (likely(done)) { /* Now wake up any sg_read() that is waiting for this * packet. */ |
1da177e4c Linux-2.6.12-rc2 |
1331 |
wake_up_interruptible(&sfp->read_wait); |
c6517b794 [SCSI] sg: fix ra... |
1332 |
kill_fasync(&sfp->async_qp, SIGPOLL, POLL_IN); |
c96952ed7 [SCSI] sg: avoid ... |
1333 |
kref_put(&sfp->f_ref, sg_remove_sfp); |
015640edb [SCSI] sg: fix q-... |
1334 1335 1336 1337 |
} else { INIT_WORK(&srp->ew.work, sg_rq_end_io_usercontext); schedule_work(&srp->ew.work); } |
1da177e4c Linux-2.6.12-rc2 |
1338 |
} |
828c09509 const: constify r... |
1339 |
static const struct file_operations sg_fops = { |
1da177e4c Linux-2.6.12-rc2 |
1340 1341 1342 1343 |
.owner = THIS_MODULE, .read = sg_read, .write = sg_write, .poll = sg_poll, |
f4927c45b scsi: Push down B... |
1344 |
.unlocked_ioctl = sg_unlocked_ioctl, |
1da177e4c Linux-2.6.12-rc2 |
1345 1346 1347 1348 1349 1350 1351 |
#ifdef CONFIG_COMPAT .compat_ioctl = sg_compat_ioctl, #endif .open = sg_open, .mmap = sg_mmap, .release = sg_release, .fasync = sg_fasync, |
6038f373a llseek: automatic... |
1352 |
.llseek = no_llseek, |
1da177e4c Linux-2.6.12-rc2 |
1353 |
}; |
d253878b3 [PATCH] class: co... |
1354 |
static struct class *sg_sysfs_class; |
1da177e4c Linux-2.6.12-rc2 |
1355 1356 |
static int sg_sysfs_valid = 0; |
7c07d613d [SCSI] sg: use id... |
1357 |
static Sg_device *sg_alloc(struct gendisk *disk, struct scsi_device *scsidp) |
1da177e4c Linux-2.6.12-rc2 |
1358 |
{ |
d6b10348f [SCSI] convert sg... |
1359 |
struct request_queue *q = scsidp->request_queue; |
1da177e4c Linux-2.6.12-rc2 |
1360 1361 |
Sg_device *sdp; unsigned long iflags; |
7c07d613d [SCSI] sg: use id... |
1362 1363 |
int error; u32 k; |
1da177e4c Linux-2.6.12-rc2 |
1364 |
|
24669f75a [SCSI] SCSI core ... |
1365 |
sdp = kzalloc(sizeof(Sg_device), GFP_KERNEL); |
1da177e4c Linux-2.6.12-rc2 |
1366 1367 1368 |
if (!sdp) { printk(KERN_WARNING "kmalloc Sg_device failure "); |
7c07d613d [SCSI] sg: use id... |
1369 1370 |
return ERR_PTR(-ENOMEM); } |
c6517b794 [SCSI] sg: fix ra... |
1371 |
|
7c07d613d [SCSI] sg: use id... |
1372 1373 1374 |
if (!idr_pre_get(&sg_index_idr, GFP_KERNEL)) { printk(KERN_WARNING "idr expansion Sg_device failure "); |
c6517b794 [SCSI] sg: fix ra... |
1375 |
error = -ENOMEM; |
7c07d613d [SCSI] sg: use id... |
1376 |
goto out; |
1da177e4c Linux-2.6.12-rc2 |
1377 |
} |
7c07d613d [SCSI] sg: use id... |
1378 |
write_lock_irqsave(&sg_index_lock, iflags); |
1da177e4c Linux-2.6.12-rc2 |
1379 |
|
c6517b794 [SCSI] sg: fix ra... |
1380 |
error = idr_get_new(&sg_index_idr, sdp, &k); |
7c07d613d [SCSI] sg: use id... |
1381 |
if (error) { |
c6517b794 [SCSI] sg: fix ra... |
1382 |
write_unlock_irqrestore(&sg_index_lock, iflags); |
7c07d613d [SCSI] sg: use id... |
1383 1384 1385 1386 |
printk(KERN_WARNING "idr allocation Sg_device failure: %d ", error); goto out; |
1da177e4c Linux-2.6.12-rc2 |
1387 |
} |
1da177e4c Linux-2.6.12-rc2 |
1388 1389 |
if (unlikely(k >= SG_MAX_DEVS)) goto overflow; |
1da177e4c Linux-2.6.12-rc2 |
1390 1391 1392 1393 1394 1395 |
SCSI_LOG_TIMEOUT(3, printk("sg_alloc: dev=%d ", k)); sprintf(disk->disk_name, "sg%d", k); disk->first_minor = k; sdp->disk = disk; sdp->device = scsidp; |
3442f802a [SCSI] sg: remove... |
1396 |
INIT_LIST_HEAD(&sdp->sfds); |
1da177e4c Linux-2.6.12-rc2 |
1397 |
init_waitqueue_head(&sdp->o_excl_wait); |
8a78362c4 block: Consolidat... |
1398 |
sdp->sg_tablesize = queue_max_segments(q); |
7c07d613d [SCSI] sg: use id... |
1399 |
sdp->index = k; |
c6517b794 [SCSI] sg: fix ra... |
1400 1401 1402 |
kref_init(&sdp->d_ref); write_unlock_irqrestore(&sg_index_lock, iflags); |
1da177e4c Linux-2.6.12-rc2 |
1403 |
|
7c07d613d [SCSI] sg: use id... |
1404 |
error = 0; |
1da177e4c Linux-2.6.12-rc2 |
1405 |
out: |
7c07d613d [SCSI] sg: use id... |
1406 |
if (error) { |
1da177e4c Linux-2.6.12-rc2 |
1407 |
kfree(sdp); |
7c07d613d [SCSI] sg: use id... |
1408 1409 1410 |
return ERR_PTR(error); } return sdp; |
1da177e4c Linux-2.6.12-rc2 |
1411 1412 |
overflow: |
c6517b794 [SCSI] sg: fix ra... |
1413 1414 |
idr_remove(&sg_index_idr, k); write_unlock_irqrestore(&sg_index_lock, iflags); |
9ccfc756a [SCSI] move the m... |
1415 1416 1417 1418 |
sdev_printk(KERN_WARNING, scsidp, "Unable to attach sg device type=%d, minor " "number exceeds %d ", scsidp->type, SG_MAX_DEVS - 1); |
1da177e4c Linux-2.6.12-rc2 |
1419 1420 1421 1422 1423 |
error = -ENODEV; goto out; } static int |
ee959b00c SCSI: convert str... |
1424 |
sg_add(struct device *cl_dev, struct class_interface *cl_intf) |
1da177e4c Linux-2.6.12-rc2 |
1425 |
{ |
ee959b00c SCSI: convert str... |
1426 |
struct scsi_device *scsidp = to_scsi_device(cl_dev->parent); |
1da177e4c Linux-2.6.12-rc2 |
1427 1428 1429 |
struct gendisk *disk; Sg_device *sdp = NULL; struct cdev * cdev = NULL; |
7c07d613d [SCSI] sg: use id... |
1430 |
int error; |
454e8957e [SCSI] sg.c: Fix ... |
1431 |
unsigned long iflags; |
1da177e4c Linux-2.6.12-rc2 |
1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 |
disk = alloc_disk(1); if (!disk) { printk(KERN_WARNING "alloc_disk failed "); return -ENOMEM; } disk->major = SCSI_GENERIC_MAJOR; error = -ENOMEM; cdev = cdev_alloc(); if (!cdev) { printk(KERN_WARNING "cdev_alloc failed "); goto out; } cdev->owner = THIS_MODULE; cdev->ops = &sg_fops; |
7c07d613d [SCSI] sg: use id... |
1450 1451 |
sdp = sg_alloc(disk, scsidp); if (IS_ERR(sdp)) { |
1da177e4c Linux-2.6.12-rc2 |
1452 1453 |
printk(KERN_WARNING "sg_alloc failed "); |
7c07d613d [SCSI] sg: use id... |
1454 |
error = PTR_ERR(sdp); |
1da177e4c Linux-2.6.12-rc2 |
1455 1456 |
goto out; } |
1da177e4c Linux-2.6.12-rc2 |
1457 |
|
7c07d613d [SCSI] sg: use id... |
1458 |
error = cdev_add(cdev, MKDEV(SCSI_GENERIC_MAJOR, sdp->index), 1); |
5e3c34c1e [SCSI] Remove dev... |
1459 |
if (error) |
454e8957e [SCSI] sg.c: Fix ... |
1460 |
goto cdev_add_err; |
5e3c34c1e [SCSI] Remove dev... |
1461 |
|
1da177e4c Linux-2.6.12-rc2 |
1462 1463 |
sdp->cdev = cdev; if (sg_sysfs_valid) { |
ee959b00c SCSI: convert str... |
1464 |
struct device *sg_class_member; |
1da177e4c Linux-2.6.12-rc2 |
1465 |
|
d73a1a674 device create: sc... |
1466 1467 1468 1469 |
sg_class_member = device_create(sg_sysfs_class, cl_dev->parent, MKDEV(SCSI_GENERIC_MAJOR, sdp->index), sdp, "%s", disk->disk_name); |
d07e03610 [SCSI] sg: handle... |
1470 1471 |
if (IS_ERR(sg_class_member)) { printk(KERN_ERR "sg_add: " |
ee959b00c SCSI: convert str... |
1472 1473 |
"device_create failed "); |
d07e03610 [SCSI] sg: handle... |
1474 1475 1476 |
error = PTR_ERR(sg_class_member); goto cdev_add_err; } |
d07e03610 [SCSI] sg: handle... |
1477 |
error = sysfs_create_link(&scsidp->sdev_gendev.kobj, |
1da177e4c Linux-2.6.12-rc2 |
1478 1479 1480 |
&sg_class_member->kobj, "generic"); if (error) printk(KERN_ERR "sg_add: unable to make symlink " |
7c07d613d [SCSI] sg: use id... |
1481 1482 |
"'generic' back to sg%d ", sdp->index); |
1da177e4c Linux-2.6.12-rc2 |
1483 |
} else |
7c07d613d [SCSI] sg: use id... |
1484 1485 |
printk(KERN_WARNING "sg_add: sg_sys Invalid "); |
1da177e4c Linux-2.6.12-rc2 |
1486 |
|
9ccfc756a [SCSI] move the m... |
1487 |
sdev_printk(KERN_NOTICE, scsidp, |
7c07d613d [SCSI] sg: use id... |
1488 1489 1490 |
"Attached scsi generic sg%d type %d ", sdp->index, scsidp->type); |
1da177e4c Linux-2.6.12-rc2 |
1491 |
|
ee959b00c SCSI: convert str... |
1492 |
dev_set_drvdata(cl_dev, sdp); |
a24484f28 [SCSI] sg: set cl... |
1493 |
|
1da177e4c Linux-2.6.12-rc2 |
1494 |
return 0; |
454e8957e [SCSI] sg.c: Fix ... |
1495 |
cdev_add_err: |
7c07d613d [SCSI] sg: use id... |
1496 1497 1498 1499 |
write_lock_irqsave(&sg_index_lock, iflags); idr_remove(&sg_index_idr, sdp->index); write_unlock_irqrestore(&sg_index_lock, iflags); kfree(sdp); |
454e8957e [SCSI] sg.c: Fix ... |
1500 |
|
1da177e4c Linux-2.6.12-rc2 |
1501 1502 1503 1504 1505 1506 |
out: put_disk(disk); if (cdev) cdev_del(cdev); return error; } |
c6517b794 [SCSI] sg: fix ra... |
1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 |
static void sg_device_destroy(struct kref *kref) { struct sg_device *sdp = container_of(kref, struct sg_device, d_ref); unsigned long flags; /* CAUTION! Note that the device can still be found via idr_find() * even though the refcount is 0. Therefore, do idr_remove() BEFORE * any other cleanup. */ write_lock_irqsave(&sg_index_lock, flags); idr_remove(&sg_index_idr, sdp->index); write_unlock_irqrestore(&sg_index_lock, flags); SCSI_LOG_TIMEOUT(3, printk("sg_device_destroy: %s ", sdp->disk->disk_name)); put_disk(sdp->disk); kfree(sdp); } static void sg_remove(struct device *cl_dev, struct class_interface *cl_intf) |
1da177e4c Linux-2.6.12-rc2 |
1531 |
{ |
ee959b00c SCSI: convert str... |
1532 1533 |
struct scsi_device *scsidp = to_scsi_device(cl_dev->parent); Sg_device *sdp = dev_get_drvdata(cl_dev); |
1da177e4c Linux-2.6.12-rc2 |
1534 1535 |
unsigned long iflags; Sg_fd *sfp; |
1da177e4c Linux-2.6.12-rc2 |
1536 |
|
c6517b794 [SCSI] sg: fix ra... |
1537 |
if (!sdp || sdp->detached) |
1da177e4c Linux-2.6.12-rc2 |
1538 |
return; |
7c07d613d [SCSI] sg: use id... |
1539 |
|
c6517b794 [SCSI] sg: fix ra... |
1540 1541 1542 1543 |
SCSI_LOG_TIMEOUT(3, printk("sg_remove: %s ", sdp->disk->disk_name)); /* Need a write lock to set sdp->detached. */ |
7c07d613d [SCSI] sg: use id... |
1544 |
write_lock_irqsave(&sg_index_lock, iflags); |
c6517b794 [SCSI] sg: fix ra... |
1545 |
sdp->detached = 1; |
3442f802a [SCSI] sg: remove... |
1546 |
list_for_each_entry(sfp, &sdp->sfds, sfd_siblings) { |
c6517b794 [SCSI] sg: fix ra... |
1547 1548 |
wake_up_interruptible(&sfp->read_wait); kill_fasync(&sfp->async_qp, SIGPOLL, POLL_HUP); |
7c07d613d [SCSI] sg: use id... |
1549 1550 1551 1552 |
} write_unlock_irqrestore(&sg_index_lock, iflags); sysfs_remove_link(&scsidp->sdev_gendev.kobj, "generic"); |
ee959b00c SCSI: convert str... |
1553 |
device_destroy(sg_sysfs_class, MKDEV(SCSI_GENERIC_MAJOR, sdp->index)); |
7c07d613d [SCSI] sg: use id... |
1554 1555 |
cdev_del(sdp->cdev); sdp->cdev = NULL; |
1da177e4c Linux-2.6.12-rc2 |
1556 |
|
c6517b794 [SCSI] sg: fix ra... |
1557 |
sg_put_dev(sdp); |
1da177e4c Linux-2.6.12-rc2 |
1558 |
} |
6460e75a1 [SCSI] sg: fixes ... |
1559 1560 1561 |
module_param_named(scatter_elem_sz, scatter_elem_sz, int, S_IRUGO | S_IWUSR); module_param_named(def_reserved_size, def_reserved_size, int, S_IRUGO | S_IWUSR); |
1da177e4c Linux-2.6.12-rc2 |
1562 1563 1564 1565 1566 1567 |
module_param_named(allow_dio, sg_allow_dio, int, S_IRUGO | S_IWUSR); MODULE_AUTHOR("Douglas Gilbert"); MODULE_DESCRIPTION("SCSI generic (sg) driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(SG_VERSION_STR); |
f018fa552 [SCSI] MODULE_ALI... |
1568 |
MODULE_ALIAS_CHARDEV_MAJOR(SCSI_GENERIC_MAJOR); |
1da177e4c Linux-2.6.12-rc2 |
1569 |
|
6460e75a1 [SCSI] sg: fixes ... |
1570 1571 |
MODULE_PARM_DESC(scatter_elem_sz, "scatter gather element " "size (default: max(SG_SCATTER_SZ, PAGE_SIZE))"); |
1da177e4c Linux-2.6.12-rc2 |
1572 1573 1574 1575 1576 1577 1578 |
MODULE_PARM_DESC(def_reserved_size, "size of buffer reserved for each fd"); MODULE_PARM_DESC(allow_dio, "allow direct I/O (default: 0 (disallow))"); static int __init init_sg(void) { int rc; |
6460e75a1 [SCSI] sg: fixes ... |
1579 1580 1581 1582 |
if (scatter_elem_sz < PAGE_SIZE) { scatter_elem_sz = PAGE_SIZE; scatter_elem_sz_prev = scatter_elem_sz; } |
1da177e4c Linux-2.6.12-rc2 |
1583 1584 |
if (def_reserved_size >= 0) sg_big_buff = def_reserved_size; |
6460e75a1 [SCSI] sg: fixes ... |
1585 1586 |
else def_reserved_size = sg_big_buff; |
1da177e4c Linux-2.6.12-rc2 |
1587 1588 1589 1590 1591 |
rc = register_chrdev_region(MKDEV(SCSI_GENERIC_MAJOR, 0), SG_MAX_DEVS, "sg"); if (rc) return rc; |
d253878b3 [PATCH] class: co... |
1592 |
sg_sysfs_class = class_create(THIS_MODULE, "scsi_generic"); |
1da177e4c Linux-2.6.12-rc2 |
1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 |
if ( IS_ERR(sg_sysfs_class) ) { rc = PTR_ERR(sg_sysfs_class); goto err_out; } sg_sysfs_valid = 1; rc = scsi_register_interface(&sg_interface); if (0 == rc) { #ifdef CONFIG_SCSI_PROC_FS sg_proc_init(); #endif /* CONFIG_SCSI_PROC_FS */ return 0; } |
d253878b3 [PATCH] class: co... |
1605 |
class_destroy(sg_sysfs_class); |
1da177e4c Linux-2.6.12-rc2 |
1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 |
err_out: unregister_chrdev_region(MKDEV(SCSI_GENERIC_MAJOR, 0), SG_MAX_DEVS); return rc; } static void __exit exit_sg(void) { #ifdef CONFIG_SCSI_PROC_FS sg_proc_cleanup(); #endif /* CONFIG_SCSI_PROC_FS */ scsi_unregister_interface(&sg_interface); |
d253878b3 [PATCH] class: co... |
1618 |
class_destroy(sg_sysfs_class); |
1da177e4c Linux-2.6.12-rc2 |
1619 1620 1621 |
sg_sysfs_valid = 0; unregister_chrdev_region(MKDEV(SCSI_GENERIC_MAJOR, 0), SG_MAX_DEVS); |
7c07d613d [SCSI] sg: use id... |
1622 |
idr_destroy(&sg_index_idr); |
1da177e4c Linux-2.6.12-rc2 |
1623 |
} |
44c7b0eaa sg: remove __sg_s... |
1624 |
static int sg_start_req(Sg_request *srp, unsigned char *cmd) |
10865dfa3 sg: convert the n... |
1625 |
{ |
626710c9d sg: incorporate s... |
1626 |
int res; |
10865dfa3 sg: convert the n... |
1627 |
struct request *rq; |
44c7b0eaa sg: remove __sg_s... |
1628 1629 1630 1631 |
Sg_fd *sfp = srp->parentfp; sg_io_hdr_t *hp = &srp->header; int dxfer_len = (int) hp->dxfer_len; int dxfer_dir = hp->dxfer_direction; |
626710c9d sg: incorporate s... |
1632 |
unsigned int iov_count = hp->iovec_count; |
44c7b0eaa sg: remove __sg_s... |
1633 1634 1635 |
Sg_scatter_hold *req_schp = &srp->data; Sg_scatter_hold *rsv_schp = &sfp->reserve; struct request_queue *q = sfp->parentdp->device->request_queue; |
626710c9d sg: incorporate s... |
1636 |
struct rq_map_data *md, map_data; |
10865dfa3 sg: convert the n... |
1637 |
int rw = hp->dxfer_direction == SG_DXFER_TO_DEV ? WRITE : READ; |
44c7b0eaa sg: remove __sg_s... |
1638 1639 1640 |
SCSI_LOG_TIMEOUT(4, printk(KERN_INFO "sg_start_req: dxfer_len=%d ", dxfer_len)); |
10865dfa3 sg: convert the n... |
1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 |
rq = blk_get_request(q, rw, GFP_ATOMIC); if (!rq) return -ENOMEM; memcpy(rq->cmd, cmd, hp->cmd_len); rq->cmd_len = hp->cmd_len; rq->cmd_type = REQ_TYPE_BLOCK_PC; srp->rq = rq; rq->end_io_data = srp; rq->sense = srp->sense_b; rq->retries = SG_DEFAULT_RETRIES; |
1da177e4c Linux-2.6.12-rc2 |
1654 |
if ((dxfer_len <= 0) || (dxfer_dir == SG_DXFER_NONE)) |
10db10d14 sg: convert the i... |
1655 |
return 0; |
10865dfa3 sg: convert the n... |
1656 |
|
626710c9d sg: incorporate s... |
1657 1658 1659 |
if (sg_allow_dio && hp->flags & SG_FLAG_DIRECT_IO && dxfer_dir != SG_DXFER_UNKNOWN && !iov_count && !sfp->parentdp->device->host->unchecked_isa_dma && |
2610a2540 sg: fix a warning... |
1660 |
blk_rq_aligned(q, (unsigned long)hp->dxferp, dxfer_len)) |
626710c9d sg: incorporate s... |
1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 |
md = NULL; else md = &map_data; if (md) { if (!sg_res_in_use(sfp) && dxfer_len <= rsv_schp->bufflen) sg_link_reserve(sfp, srp, dxfer_len); else { res = sg_build_indirect(req_schp, sfp, dxfer_len); if (res) return res; } |
7e56cb0f7 sg: remove SG_ALL... |
1673 |
|
626710c9d sg: incorporate s... |
1674 1675 1676 |
md->pages = req_schp->pages; md->page_order = req_schp->page_order; md->nr_entries = req_schp->k_use_sg; |
56c451f4b [SCSI] block: fix... |
1677 |
md->offset = 0; |
97ae77a1c [SCSI] block: mak... |
1678 |
md->null_mapped = hp->dxferp ? 0 : 1; |
ecb554a84 block: fix sg SG_... |
1679 1680 1681 1682 |
if (dxfer_dir == SG_DXFER_TO_FROM_DEV) md->from_user = 1; else md->from_user = 0; |
626710c9d sg: incorporate s... |
1683 |
} |
0fdf96b67 [SCSI] sg: fix io... |
1684 1685 1686 |
if (iov_count) { int len, size = sizeof(struct sg_iovec) * iov_count; struct iovec *iov; |
3094141c6 drivers/scsi: use... |
1687 1688 1689 |
iov = memdup_user(hp->dxferp, size); if (IS_ERR(iov)) return PTR_ERR(iov); |
0fdf96b67 [SCSI] sg: fix io... |
1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 |
len = iov_length(iov, iov_count); if (hp->dxfer_len < len) { iov_count = iov_shorten(iov, iov_count, hp->dxfer_len); len = hp->dxfer_len; } res = blk_rq_map_user_iov(q, rq, md, (struct sg_iovec *)iov, iov_count, len, GFP_ATOMIC); kfree(iov); } else |
626710c9d sg: incorporate s... |
1702 1703 |
res = blk_rq_map_user(q, rq, md, hp->dxferp, hp->dxfer_len, GFP_ATOMIC); |
10db10d14 sg: convert the i... |
1704 1705 |
if (!res) { |
626710c9d sg: incorporate s... |
1706 |
srp->bio = rq->bio; |
10db10d14 sg: convert the i... |
1707 |
|
626710c9d sg: incorporate s... |
1708 1709 1710 1711 1712 |
if (!md) { req_schp->dio_in_use = 1; hp->info |= SG_INFO_DIRECT_IO; } } |
10db10d14 sg: convert the i... |
1713 |
return res; |
1da177e4c Linux-2.6.12-rc2 |
1714 |
} |
e7ee4cc04 [SCSI] sg: return... |
1715 |
static int sg_finish_rem_req(Sg_request * srp) |
1da177e4c Linux-2.6.12-rc2 |
1716 |
{ |
e7ee4cc04 [SCSI] sg: return... |
1717 |
int ret = 0; |
1da177e4c Linux-2.6.12-rc2 |
1718 1719 1720 1721 1722 |
Sg_fd *sfp = srp->parentfp; Sg_scatter_hold *req_schp = &srp->data; SCSI_LOG_TIMEOUT(4, printk("sg_finish_rem_req: res_used=%d ", (int) srp->res_used)); |
6e5a30cba sg: convert the d... |
1723 1724 |
if (srp->rq) { if (srp->bio) |
e7ee4cc04 [SCSI] sg: return... |
1725 |
ret = blk_rq_unmap_user(srp->bio); |
10db10d14 sg: convert the i... |
1726 |
|
10865dfa3 sg: convert the n... |
1727 |
blk_put_request(srp->rq); |
6e5a30cba sg: convert the d... |
1728 |
} |
10865dfa3 sg: convert the n... |
1729 |
|
e27168f8c [SCSI] sg: Free d... |
1730 1731 1732 1733 |
if (srp->res_used) sg_unlink_reserve(sfp, srp); else sg_remove_scat(req_schp); |
1da177e4c Linux-2.6.12-rc2 |
1734 |
sg_remove_request(sfp, srp); |
e7ee4cc04 [SCSI] sg: return... |
1735 1736 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
1737 1738 1739 1740 1741 |
} static int sg_build_sgat(Sg_scatter_hold * schp, const Sg_fd * sfp, int tablesize) { |
10db10d14 sg: convert the i... |
1742 |
int sg_bufflen = tablesize * sizeof(struct page *); |
2d20eaf94 [PATCH] sg gfp_t ... |
1743 |
gfp_t gfp_flags = GFP_ATOMIC | __GFP_NOWARN; |
1da177e4c Linux-2.6.12-rc2 |
1744 |
|
10db10d14 sg: convert the i... |
1745 1746 |
schp->pages = kzalloc(sg_bufflen, gfp_flags); if (!schp->pages) |
1da177e4c Linux-2.6.12-rc2 |
1747 |
return -ENOMEM; |
1da177e4c Linux-2.6.12-rc2 |
1748 |
schp->sglist_len = sg_bufflen; |
d6b10348f [SCSI] convert sg... |
1749 |
return tablesize; /* number of scat_gath elements allocated */ |
1da177e4c Linux-2.6.12-rc2 |
1750 |
} |
1da177e4c Linux-2.6.12-rc2 |
1751 1752 1753 |
static int sg_build_indirect(Sg_scatter_hold * schp, Sg_fd * sfp, int buff_size) { |
10db10d14 sg: convert the i... |
1754 |
int ret_sz = 0, i, k, rem_sz, num, mx_sc_elems; |
d6b10348f [SCSI] convert sg... |
1755 |
int sg_tablesize = sfp->parentdp->sg_tablesize; |
10db10d14 sg: convert the i... |
1756 1757 |
int blk_size = buff_size, order; gfp_t gfp_mask = GFP_ATOMIC | __GFP_COMP | __GFP_NOWARN; |
1da177e4c Linux-2.6.12-rc2 |
1758 |
|
fb119935e [SCSI] sg: remove... |
1759 |
if (blk_size < 0) |
1da177e4c Linux-2.6.12-rc2 |
1760 1761 1762 |
return -EFAULT; if (0 == blk_size) ++blk_size; /* don't know why */ |
b2ed6c69a [SCSI] sg: use AL... |
1763 1764 |
/* round request up to next highest SG_SECTOR_SZ byte boundary */ blk_size = ALIGN(blk_size, SG_SECTOR_SZ); |
1da177e4c Linux-2.6.12-rc2 |
1765 1766 1767 |
SCSI_LOG_TIMEOUT(4, printk("sg_build_indirect: buff_size=%d, blk_size=%d ", buff_size, blk_size)); |
d6b10348f [SCSI] convert sg... |
1768 1769 1770 1771 1772 |
/* N.B. ret_sz carried into this block ... */ mx_sc_elems = sg_build_sgat(schp, sfp, sg_tablesize); if (mx_sc_elems < 0) return mx_sc_elems; /* most likely -ENOMEM */ |
6460e75a1 [SCSI] sg: fixes ... |
1773 1774 1775 1776 1777 1778 1779 1780 |
num = scatter_elem_sz; if (unlikely(num != scatter_elem_sz_prev)) { if (num < PAGE_SIZE) { scatter_elem_sz = PAGE_SIZE; scatter_elem_sz_prev = PAGE_SIZE; } else scatter_elem_sz_prev = num; } |
10db10d14 sg: convert the i... |
1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 |
if (sfp->low_dma) gfp_mask |= GFP_DMA; if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) gfp_mask |= __GFP_ZERO; order = get_order(num); retry: ret_sz = 1 << (PAGE_SHIFT + order); for (k = 0, rem_sz = blk_size; rem_sz > 0 && k < mx_sc_elems; k++, rem_sz -= ret_sz) { |
6460e75a1 [SCSI] sg: fixes ... |
1794 |
num = (rem_sz > scatter_elem_sz_prev) ? |
10db10d14 sg: convert the i... |
1795 1796 1797 1798 1799 |
scatter_elem_sz_prev : rem_sz; schp->pages[k] = alloc_pages(gfp_mask, order); if (!schp->pages[k]) goto out; |
d6b10348f [SCSI] convert sg... |
1800 |
|
6460e75a1 [SCSI] sg: fixes ... |
1801 1802 1803 1804 1805 1806 |
if (num == scatter_elem_sz_prev) { if (unlikely(ret_sz > scatter_elem_sz_prev)) { scatter_elem_sz = ret_sz; scatter_elem_sz_prev = ret_sz; } } |
d6b10348f [SCSI] convert sg... |
1807 |
|
7ca63cb47 [SCSI] sg: fix in... |
1808 1809 1810 |
SCSI_LOG_TIMEOUT(5, printk("sg_build_indirect: k=%d, num=%d, " "ret_sz=%d ", k, num, ret_sz)); |
d6b10348f [SCSI] convert sg... |
1811 |
} /* end of for loop */ |
10db10d14 sg: convert the i... |
1812 |
schp->page_order = order; |
d6b10348f [SCSI] convert sg... |
1813 |
schp->k_use_sg = k; |
7ca63cb47 [SCSI] sg: fix in... |
1814 1815 1816 |
SCSI_LOG_TIMEOUT(5, printk("sg_build_indirect: k_use_sg=%d, " "rem_sz=%d ", k, rem_sz)); |
d6b10348f [SCSI] convert sg... |
1817 1818 1819 1820 |
schp->bufflen = blk_size; if (rem_sz > 0) /* must have failed */ return -ENOMEM; |
1da177e4c Linux-2.6.12-rc2 |
1821 |
return 0; |
10db10d14 sg: convert the i... |
1822 1823 |
out: for (i = 0; i < k; i++) |
e71044ee2 [SCSI] sg: fix oo... |
1824 |
__free_pages(schp->pages[i], order); |
10db10d14 sg: convert the i... |
1825 1826 1827 1828 1829 |
if (--order >= 0) goto retry; return -ENOMEM; |
1da177e4c Linux-2.6.12-rc2 |
1830 |
} |
1da177e4c Linux-2.6.12-rc2 |
1831 1832 1833 1834 1835 |
static void sg_remove_scat(Sg_scatter_hold * schp) { SCSI_LOG_TIMEOUT(4, printk("sg_remove_scat: k_use_sg=%d ", schp->k_use_sg)); |
10db10d14 sg: convert the i... |
1836 |
if (schp->pages && schp->sglist_len > 0) { |
6e5a30cba sg: convert the d... |
1837 |
if (!schp->dio_in_use) { |
1da177e4c Linux-2.6.12-rc2 |
1838 |
int k; |
10db10d14 sg: convert the i... |
1839 |
for (k = 0; k < schp->k_use_sg && schp->pages[k]; k++) { |
1da177e4c Linux-2.6.12-rc2 |
1840 |
SCSI_LOG_TIMEOUT(5, printk( |
10db10d14 sg: convert the i... |
1841 1842 1843 1844 |
"sg_remove_scat: k=%d, pg=0x%p ", k, schp->pages[k])); __free_pages(schp->pages[k], schp->page_order); |
1da177e4c Linux-2.6.12-rc2 |
1845 |
} |
6e5a30cba sg: convert the d... |
1846 |
|
10db10d14 sg: convert the i... |
1847 |
kfree(schp->pages); |
1da177e4c Linux-2.6.12-rc2 |
1848 |
} |
d6b10348f [SCSI] convert sg... |
1849 |
} |
1da177e4c Linux-2.6.12-rc2 |
1850 1851 1852 1853 |
memset(schp, 0, sizeof (*schp)); } static int |
1da177e4c Linux-2.6.12-rc2 |
1854 1855 1856 |
sg_read_oxfer(Sg_request * srp, char __user *outp, int num_read_xfer) { Sg_scatter_hold *schp = &srp->data; |
d6b10348f [SCSI] convert sg... |
1857 |
int k, num; |
1da177e4c Linux-2.6.12-rc2 |
1858 1859 1860 1861 1862 1863 |
SCSI_LOG_TIMEOUT(4, printk("sg_read_oxfer: num_read_xfer=%d ", num_read_xfer)); if ((!outp) || (num_read_xfer <= 0)) return 0; |
d6b10348f [SCSI] convert sg... |
1864 |
|
10db10d14 sg: convert the i... |
1865 1866 |
num = 1 << (PAGE_SHIFT + schp->page_order); for (k = 0; k < schp->k_use_sg && schp->pages[k]; k++) { |
d6b10348f [SCSI] convert sg... |
1867 |
if (num > num_read_xfer) { |
10db10d14 sg: convert the i... |
1868 |
if (__copy_to_user(outp, page_address(schp->pages[k]), |
d6b10348f [SCSI] convert sg... |
1869 1870 1871 1872 |
num_read_xfer)) return -EFAULT; break; } else { |
10db10d14 sg: convert the i... |
1873 |
if (__copy_to_user(outp, page_address(schp->pages[k]), |
d6b10348f [SCSI] convert sg... |
1874 1875 1876 1877 |
num)) return -EFAULT; num_read_xfer -= num; if (num_read_xfer <= 0) |
1da177e4c Linux-2.6.12-rc2 |
1878 |
break; |
d6b10348f [SCSI] convert sg... |
1879 |
outp += num; |
1da177e4c Linux-2.6.12-rc2 |
1880 |
} |
1da177e4c Linux-2.6.12-rc2 |
1881 |
} |
d6b10348f [SCSI] convert sg... |
1882 |
|
1da177e4c Linux-2.6.12-rc2 |
1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 |
return 0; } static void sg_build_reserve(Sg_fd * sfp, int req_size) { Sg_scatter_hold *schp = &sfp->reserve; SCSI_LOG_TIMEOUT(4, printk("sg_build_reserve: req_size=%d ", req_size)); do { if (req_size < PAGE_SIZE) req_size = PAGE_SIZE; if (0 == sg_build_indirect(schp, sfp, req_size)) return; else sg_remove_scat(schp); req_size >>= 1; /* divide by 2 */ } while (req_size > (PAGE_SIZE / 2)); } static void sg_link_reserve(Sg_fd * sfp, Sg_request * srp, int size) { Sg_scatter_hold *req_schp = &srp->data; Sg_scatter_hold *rsv_schp = &sfp->reserve; |
d6b10348f [SCSI] convert sg... |
1909 |
int k, num, rem; |
1da177e4c Linux-2.6.12-rc2 |
1910 1911 1912 1913 |
srp->res_used = 1; SCSI_LOG_TIMEOUT(4, printk("sg_link_reserve: size=%d ", size)); |
eca7be5e1 [SCSI] sg: Remove... |
1914 |
rem = size; |
d6b10348f [SCSI] convert sg... |
1915 |
|
10db10d14 sg: convert the i... |
1916 1917 |
num = 1 << (PAGE_SHIFT + rsv_schp->page_order); for (k = 0; k < rsv_schp->k_use_sg; k++) { |
d6b10348f [SCSI] convert sg... |
1918 |
if (rem <= num) { |
d6b10348f [SCSI] convert sg... |
1919 1920 |
req_schp->k_use_sg = k + 1; req_schp->sglist_len = rsv_schp->sglist_len; |
10db10d14 sg: convert the i... |
1921 |
req_schp->pages = rsv_schp->pages; |
d6b10348f [SCSI] convert sg... |
1922 1923 |
req_schp->bufflen = size; |
10db10d14 sg: convert the i... |
1924 |
req_schp->page_order = rsv_schp->page_order; |
d6b10348f [SCSI] convert sg... |
1925 1926 1927 |
break; } else rem -= num; |
1da177e4c Linux-2.6.12-rc2 |
1928 |
} |
d6b10348f [SCSI] convert sg... |
1929 1930 1931 1932 |
if (k >= rsv_schp->k_use_sg) SCSI_LOG_TIMEOUT(1, printk("sg_link_reserve: BAD size ")); |
1da177e4c Linux-2.6.12-rc2 |
1933 1934 1935 1936 1937 1938 |
} static void sg_unlink_reserve(Sg_fd * sfp, Sg_request * srp) { Sg_scatter_hold *req_schp = &srp->data; |
1da177e4c Linux-2.6.12-rc2 |
1939 1940 1941 1942 |
SCSI_LOG_TIMEOUT(4, printk("sg_unlink_reserve: req->k_use_sg=%d ", (int) req_schp->k_use_sg)); |
1da177e4c Linux-2.6.12-rc2 |
1943 1944 |
req_schp->k_use_sg = 0; req_schp->bufflen = 0; |
10db10d14 sg: convert the i... |
1945 1946 |
req_schp->pages = NULL; req_schp->page_order = 0; |
1da177e4c Linux-2.6.12-rc2 |
1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 |
req_schp->sglist_len = 0; sfp->save_scat_len = 0; srp->res_used = 0; } static Sg_request * sg_get_rq_mark(Sg_fd * sfp, int pack_id) { Sg_request *resp; unsigned long iflags; write_lock_irqsave(&sfp->rq_list_lock, iflags); for (resp = sfp->headrp; resp; resp = resp->nextrp) { /* look for requests that are ready + not SG_IO owned */ if ((1 == resp->done) && (!resp->sg_io_owned) && ((-1 == pack_id) || (resp->header.pack_id == pack_id))) { resp->done = 2; /* guard against other readers */ break; } } write_unlock_irqrestore(&sfp->rq_list_lock, iflags); return resp; } |
1da177e4c Linux-2.6.12-rc2 |
1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 |
/* always adds to end of list */ static Sg_request * sg_add_request(Sg_fd * sfp) { int k; unsigned long iflags; Sg_request *resp; Sg_request *rp = sfp->req_arr; write_lock_irqsave(&sfp->rq_list_lock, iflags); resp = sfp->headrp; if (!resp) { memset(rp, 0, sizeof (Sg_request)); rp->parentfp = sfp; resp = rp; sfp->headrp = resp; } else { if (0 == sfp->cmd_q) resp = NULL; /* command queuing disallowed */ else { for (k = 0; k < SG_MAX_QUEUE; ++k, ++rp) { if (!rp->parentfp) break; } if (k < SG_MAX_QUEUE) { memset(rp, 0, sizeof (Sg_request)); rp->parentfp = sfp; while (resp->nextrp) resp = resp->nextrp; resp->nextrp = rp; resp = rp; } else resp = NULL; } } if (resp) { resp->nextrp = NULL; |
cb59e8408 [PATCH] sg.c: update |
2007 |
resp->header.duration = jiffies_to_msecs(jiffies); |
1da177e4c Linux-2.6.12-rc2 |
2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 |
} write_unlock_irqrestore(&sfp->rq_list_lock, iflags); return resp; } /* Return of 1 for found; 0 for not found */ static int sg_remove_request(Sg_fd * sfp, Sg_request * srp) { Sg_request *prev_rp; Sg_request *rp; unsigned long iflags; int res = 0; if ((!sfp) || (!srp) || (!sfp->headrp)) return res; write_lock_irqsave(&sfp->rq_list_lock, iflags); prev_rp = sfp->headrp; if (srp == prev_rp) { sfp->headrp = prev_rp->nextrp; prev_rp->parentfp = NULL; res = 1; } else { while ((rp = prev_rp->nextrp)) { if (srp == rp) { prev_rp->nextrp = rp->nextrp; rp->parentfp = NULL; res = 1; break; } prev_rp = rp; } } write_unlock_irqrestore(&sfp->rq_list_lock, iflags); return res; } |
1da177e4c Linux-2.6.12-rc2 |
2044 2045 2046 2047 2048 |
static Sg_fd * sg_add_sfp(Sg_device * sdp, int dev) { Sg_fd *sfp; unsigned long iflags; |
44ec95425 [SCSI] sg: cap re... |
2049 |
int bufflen; |
1da177e4c Linux-2.6.12-rc2 |
2050 |
|
d6b10348f [SCSI] convert sg... |
2051 |
sfp = kzalloc(sizeof(*sfp), GFP_ATOMIC | __GFP_NOWARN); |
1da177e4c Linux-2.6.12-rc2 |
2052 2053 |
if (!sfp) return NULL; |
d6b10348f [SCSI] convert sg... |
2054 |
|
1da177e4c Linux-2.6.12-rc2 |
2055 2056 |
init_waitqueue_head(&sfp->read_wait); rwlock_init(&sfp->rq_list_lock); |
c6517b794 [SCSI] sg: fix ra... |
2057 |
kref_init(&sfp->f_ref); |
1da177e4c Linux-2.6.12-rc2 |
2058 2059 2060 2061 2062 2063 2064 2065 |
sfp->timeout = SG_DEFAULT_TIMEOUT; sfp->timeout_user = SG_DEFAULT_TIMEOUT_USER; sfp->force_packid = SG_DEF_FORCE_PACK_ID; sfp->low_dma = (SG_DEF_FORCE_LOW_DMA == 0) ? sdp->device->host->unchecked_isa_dma : 1; sfp->cmd_q = SG_DEF_COMMAND_Q; sfp->keep_orphan = SG_DEF_KEEP_ORPHAN; sfp->parentdp = sdp; |
7c07d613d [SCSI] sg: use id... |
2066 |
write_lock_irqsave(&sg_index_lock, iflags); |
3442f802a [SCSI] sg: remove... |
2067 |
list_add_tail(&sfp->sfd_siblings, &sdp->sfds); |
7c07d613d [SCSI] sg: use id... |
2068 |
write_unlock_irqrestore(&sg_index_lock, iflags); |
1da177e4c Linux-2.6.12-rc2 |
2069 2070 |
SCSI_LOG_TIMEOUT(3, printk("sg_add_sfp: sfp=0x%p ", sfp)); |
6460e75a1 [SCSI] sg: fixes ... |
2071 2072 |
if (unlikely(sg_big_buff != def_reserved_size)) sg_big_buff = def_reserved_size; |
44ec95425 [SCSI] sg: cap re... |
2073 |
bufflen = min_t(int, sg_big_buff, |
ae03bf639 block: Use access... |
2074 |
queue_max_sectors(sdp->device->request_queue) * 512); |
44ec95425 [SCSI] sg: cap re... |
2075 |
sg_build_reserve(sfp, bufflen); |
1da177e4c Linux-2.6.12-rc2 |
2076 2077 2078 |
SCSI_LOG_TIMEOUT(3, printk("sg_add_sfp: bufflen=%d, k_use_sg=%d ", sfp->reserve.bufflen, sfp->reserve.k_use_sg)); |
c6517b794 [SCSI] sg: fix ra... |
2079 2080 2081 |
kref_get(&sdp->d_ref); __module_get(THIS_MODULE); |
1da177e4c Linux-2.6.12-rc2 |
2082 2083 |
return sfp; } |
c6517b794 [SCSI] sg: fix ra... |
2084 |
static void sg_remove_sfp_usercontext(struct work_struct *work) |
1da177e4c Linux-2.6.12-rc2 |
2085 |
{ |
c6517b794 [SCSI] sg: fix ra... |
2086 2087 2088 2089 2090 2091 |
struct sg_fd *sfp = container_of(work, struct sg_fd, ew.work); struct sg_device *sdp = sfp->parentdp; /* Cleanup any responses which were never read(). */ while (sfp->headrp) sg_finish_rem_req(sfp->headrp); |
1da177e4c Linux-2.6.12-rc2 |
2092 |
|
1da177e4c Linux-2.6.12-rc2 |
2093 |
if (sfp->reserve.bufflen > 0) { |
c6517b794 [SCSI] sg: fix ra... |
2094 2095 2096 2097 2098 |
SCSI_LOG_TIMEOUT(6, printk("sg_remove_sfp: bufflen=%d, k_use_sg=%d ", (int) sfp->reserve.bufflen, (int) sfp->reserve.k_use_sg)); |
1da177e4c Linux-2.6.12-rc2 |
2099 2100 |
sg_remove_scat(&sfp->reserve); } |
c6517b794 [SCSI] sg: fix ra... |
2101 2102 2103 2104 2105 2106 |
SCSI_LOG_TIMEOUT(6, printk("sg_remove_sfp: %s, sfp=0x%p ", sdp->disk->disk_name, sfp)); |
d6b10348f [SCSI] convert sg... |
2107 |
kfree(sfp); |
c6517b794 [SCSI] sg: fix ra... |
2108 2109 2110 2111 |
scsi_device_put(sdp->device); sg_put_dev(sdp); module_put(THIS_MODULE); |
1da177e4c Linux-2.6.12-rc2 |
2112 |
} |
c6517b794 [SCSI] sg: fix ra... |
2113 |
static void sg_remove_sfp(struct kref *kref) |
1da177e4c Linux-2.6.12-rc2 |
2114 |
{ |
c6517b794 [SCSI] sg: fix ra... |
2115 2116 |
struct sg_fd *sfp = container_of(kref, struct sg_fd, f_ref); struct sg_device *sdp = sfp->parentdp; |
c6517b794 [SCSI] sg: fix ra... |
2117 |
unsigned long iflags; |
1da177e4c Linux-2.6.12-rc2 |
2118 |
|
c6517b794 [SCSI] sg: fix ra... |
2119 |
write_lock_irqsave(&sg_index_lock, iflags); |
3442f802a [SCSI] sg: remove... |
2120 |
list_del(&sfp->sfd_siblings); |
c6517b794 [SCSI] sg: fix ra... |
2121 2122 |
write_unlock_irqrestore(&sg_index_lock, iflags); wake_up_interruptible(&sdp->o_excl_wait); |
1da177e4c Linux-2.6.12-rc2 |
2123 |
|
015640edb [SCSI] sg: fix q-... |
2124 2125 |
INIT_WORK(&sfp->ew.work, sg_remove_sfp_usercontext); schedule_work(&sfp->ew.work); |
1da177e4c Linux-2.6.12-rc2 |
2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 |
} static int sg_res_in_use(Sg_fd * sfp) { const Sg_request *srp; unsigned long iflags; read_lock_irqsave(&sfp->rq_list_lock, iflags); for (srp = sfp->headrp; srp; srp = srp->nextrp) if (srp->res_used) break; read_unlock_irqrestore(&sfp->rq_list_lock, iflags); return srp ? 1 : 0; } |
1da177e4c Linux-2.6.12-rc2 |
2141 2142 |
#ifdef CONFIG_SCSI_PROC_FS static int |
7c07d613d [SCSI] sg: use id... |
2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 |
sg_idr_max_id(int id, void *p, void *data) { int *k = data; if (*k < id) *k = id; return 0; } static int |
1da177e4c Linux-2.6.12-rc2 |
2154 2155 |
sg_last_dev(void) { |
53474c042 [SCSI] sg: fix /p... |
2156 |
int k = -1; |
1da177e4c Linux-2.6.12-rc2 |
2157 |
unsigned long iflags; |
7c07d613d [SCSI] sg: use id... |
2158 2159 2160 |
read_lock_irqsave(&sg_index_lock, iflags); idr_for_each(&sg_index_idr, sg_idr_max_id, &k); read_unlock_irqrestore(&sg_index_lock, iflags); |
1da177e4c Linux-2.6.12-rc2 |
2161 2162 2163 |
return k + 1; /* origin 1 */ } #endif |
c6517b794 [SCSI] sg: fix ra... |
2164 2165 |
/* must be called with sg_index_lock held */ static Sg_device *sg_lookup_dev(int dev) |
1da177e4c Linux-2.6.12-rc2 |
2166 |
{ |
c6517b794 [SCSI] sg: fix ra... |
2167 2168 |
return idr_find(&sg_index_idr, dev); } |
1da177e4c Linux-2.6.12-rc2 |
2169 |
|
c6517b794 [SCSI] sg: fix ra... |
2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 |
static Sg_device *sg_get_dev(int dev) { struct sg_device *sdp; unsigned long flags; read_lock_irqsave(&sg_index_lock, flags); sdp = sg_lookup_dev(dev); if (!sdp) sdp = ERR_PTR(-ENXIO); else if (sdp->detached) { /* If sdp->detached, then the refcount may already be 0, in * which case it would be a bug to do kref_get(). */ sdp = ERR_PTR(-ENODEV); } else kref_get(&sdp->d_ref); read_unlock_irqrestore(&sg_index_lock, flags); |
7c07d613d [SCSI] sg: use id... |
2187 |
|
1da177e4c Linux-2.6.12-rc2 |
2188 2189 |
return sdp; } |
c6517b794 [SCSI] sg: fix ra... |
2190 2191 2192 2193 |
static void sg_put_dev(struct sg_device *sdp) { kref_put(&sdp->d_ref, sg_device_destroy); } |
1da177e4c Linux-2.6.12-rc2 |
2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 |
#ifdef CONFIG_SCSI_PROC_FS static struct proc_dir_entry *sg_proc_sgp = NULL; static char sg_proc_sg_dirname[] = "scsi/sg"; static int sg_proc_seq_show_int(struct seq_file *s, void *v); static int sg_proc_single_open_adio(struct inode *inode, struct file *file); static ssize_t sg_proc_write_adio(struct file *filp, const char __user *buffer, size_t count, loff_t *off); |
828c09509 const: constify r... |
2205 2206 |
static const struct file_operations adio_fops = { .owner = THIS_MODULE, |
1da177e4c Linux-2.6.12-rc2 |
2207 |
.open = sg_proc_single_open_adio, |
828c09509 const: constify r... |
2208 2209 |
.read = seq_read, .llseek = seq_lseek, |
1da177e4c Linux-2.6.12-rc2 |
2210 2211 2212 2213 2214 2215 2216 |
.write = sg_proc_write_adio, .release = single_release, }; static int sg_proc_single_open_dressz(struct inode *inode, struct file *file); static ssize_t sg_proc_write_dressz(struct file *filp, const char __user *buffer, size_t count, loff_t *off); |
828c09509 const: constify r... |
2217 2218 |
static const struct file_operations dressz_fops = { .owner = THIS_MODULE, |
1da177e4c Linux-2.6.12-rc2 |
2219 |
.open = sg_proc_single_open_dressz, |
828c09509 const: constify r... |
2220 2221 |
.read = seq_read, .llseek = seq_lseek, |
1da177e4c Linux-2.6.12-rc2 |
2222 2223 2224 2225 2226 2227 |
.write = sg_proc_write_dressz, .release = single_release, }; static int sg_proc_seq_show_version(struct seq_file *s, void *v); static int sg_proc_single_open_version(struct inode *inode, struct file *file); |
828c09509 const: constify r... |
2228 2229 |
static const struct file_operations version_fops = { .owner = THIS_MODULE, |
1da177e4c Linux-2.6.12-rc2 |
2230 |
.open = sg_proc_single_open_version, |
828c09509 const: constify r... |
2231 2232 |
.read = seq_read, .llseek = seq_lseek, |
1da177e4c Linux-2.6.12-rc2 |
2233 2234 2235 2236 2237 |
.release = single_release, }; static int sg_proc_seq_show_devhdr(struct seq_file *s, void *v); static int sg_proc_single_open_devhdr(struct inode *inode, struct file *file); |
828c09509 const: constify r... |
2238 2239 |
static const struct file_operations devhdr_fops = { .owner = THIS_MODULE, |
1da177e4c Linux-2.6.12-rc2 |
2240 |
.open = sg_proc_single_open_devhdr, |
828c09509 const: constify r... |
2241 2242 |
.read = seq_read, .llseek = seq_lseek, |
1da177e4c Linux-2.6.12-rc2 |
2243 2244 2245 2246 2247 2248 2249 2250 |
.release = single_release, }; static int sg_proc_seq_show_dev(struct seq_file *s, void *v); static int sg_proc_open_dev(struct inode *inode, struct file *file); static void * dev_seq_start(struct seq_file *s, loff_t *pos); static void * dev_seq_next(struct seq_file *s, void *v, loff_t *pos); static void dev_seq_stop(struct seq_file *s, void *v); |
828c09509 const: constify r... |
2251 2252 |
static const struct file_operations dev_fops = { .owner = THIS_MODULE, |
1da177e4c Linux-2.6.12-rc2 |
2253 |
.open = sg_proc_open_dev, |
828c09509 const: constify r... |
2254 2255 |
.read = seq_read, .llseek = seq_lseek, |
1da177e4c Linux-2.6.12-rc2 |
2256 2257 |
.release = seq_release, }; |
88e9d34c7 seq_file: constif... |
2258 |
static const struct seq_operations dev_seq_ops = { |
1da177e4c Linux-2.6.12-rc2 |
2259 2260 2261 2262 2263 2264 2265 2266 |
.start = dev_seq_start, .next = dev_seq_next, .stop = dev_seq_stop, .show = sg_proc_seq_show_dev, }; static int sg_proc_seq_show_devstrs(struct seq_file *s, void *v); static int sg_proc_open_devstrs(struct inode *inode, struct file *file); |
828c09509 const: constify r... |
2267 2268 |
static const struct file_operations devstrs_fops = { .owner = THIS_MODULE, |
1da177e4c Linux-2.6.12-rc2 |
2269 |
.open = sg_proc_open_devstrs, |
828c09509 const: constify r... |
2270 2271 |
.read = seq_read, .llseek = seq_lseek, |
1da177e4c Linux-2.6.12-rc2 |
2272 2273 |
.release = seq_release, }; |
88e9d34c7 seq_file: constif... |
2274 |
static const struct seq_operations devstrs_seq_ops = { |
1da177e4c Linux-2.6.12-rc2 |
2275 2276 2277 2278 2279 2280 2281 2282 |
.start = dev_seq_start, .next = dev_seq_next, .stop = dev_seq_stop, .show = sg_proc_seq_show_devstrs, }; static int sg_proc_seq_show_debug(struct seq_file *s, void *v); static int sg_proc_open_debug(struct inode *inode, struct file *file); |
828c09509 const: constify r... |
2283 2284 |
static const struct file_operations debug_fops = { .owner = THIS_MODULE, |
1da177e4c Linux-2.6.12-rc2 |
2285 |
.open = sg_proc_open_debug, |
828c09509 const: constify r... |
2286 2287 |
.read = seq_read, .llseek = seq_lseek, |
1da177e4c Linux-2.6.12-rc2 |
2288 2289 |
.release = seq_release, }; |
88e9d34c7 seq_file: constif... |
2290 |
static const struct seq_operations debug_seq_ops = { |
1da177e4c Linux-2.6.12-rc2 |
2291 2292 2293 2294 2295 2296 2297 2298 2299 |
.start = dev_seq_start, .next = dev_seq_next, .stop = dev_seq_stop, .show = sg_proc_seq_show_debug, }; struct sg_proc_leaf { const char * name; |
828c09509 const: constify r... |
2300 |
const struct file_operations * fops; |
1da177e4c Linux-2.6.12-rc2 |
2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 |
}; static struct sg_proc_leaf sg_proc_leaf_arr[] = { {"allow_dio", &adio_fops}, {"debug", &debug_fops}, {"def_reserved_size", &dressz_fops}, {"device_hdr", &devhdr_fops}, {"devices", &dev_fops}, {"device_strs", &devstrs_fops}, {"version", &version_fops} }; static int sg_proc_init(void) { int k, mask; |
6391a1137 [SCSI] drivers/sc... |
2317 |
int num_leaves = ARRAY_SIZE(sg_proc_leaf_arr); |
1da177e4c Linux-2.6.12-rc2 |
2318 |
struct sg_proc_leaf * leaf; |
666002218 [PATCH] proc_mkdi... |
2319 |
sg_proc_sgp = proc_mkdir(sg_proc_sg_dirname, NULL); |
1da177e4c Linux-2.6.12-rc2 |
2320 2321 2322 2323 2324 |
if (!sg_proc_sgp) return 1; for (k = 0; k < num_leaves; ++k) { leaf = &sg_proc_leaf_arr[k]; mask = leaf->fops->write ? S_IRUGO | S_IWUSR : S_IRUGO; |
a973909fc scsi: use non-rac... |
2325 |
proc_create(leaf->name, mask, sg_proc_sgp, leaf->fops); |
1da177e4c Linux-2.6.12-rc2 |
2326 2327 2328 2329 2330 2331 2332 2333 |
} return 0; } static void sg_proc_cleanup(void) { int k; |
6391a1137 [SCSI] drivers/sc... |
2334 |
int num_leaves = ARRAY_SIZE(sg_proc_leaf_arr); |
1da177e4c Linux-2.6.12-rc2 |
2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 |
if (!sg_proc_sgp) return; for (k = 0; k < num_leaves; ++k) remove_proc_entry(sg_proc_leaf_arr[k].name, sg_proc_sgp); remove_proc_entry(sg_proc_sg_dirname, NULL); } static int sg_proc_seq_show_int(struct seq_file *s, void *v) { seq_printf(s, "%d ", *((int *)s->private)); return 0; } static int sg_proc_single_open_adio(struct inode *inode, struct file *file) { return single_open(file, sg_proc_seq_show_int, &sg_allow_dio); } static ssize_t sg_proc_write_adio(struct file *filp, const char __user *buffer, size_t count, loff_t *off) { int num; char buff[11]; if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) return -EACCES; num = (count < 10) ? count : 10; if (copy_from_user(buff, buffer, num)) return -EFAULT; buff[num] = '\0'; sg_allow_dio = simple_strtoul(buff, NULL, 10) ? 1 : 0; return count; } static int sg_proc_single_open_dressz(struct inode *inode, struct file *file) { return single_open(file, sg_proc_seq_show_int, &sg_big_buff); } static ssize_t sg_proc_write_dressz(struct file *filp, const char __user *buffer, size_t count, loff_t *off) { int num; unsigned long k = ULONG_MAX; char buff[11]; if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) return -EACCES; num = (count < 10) ? count : 10; if (copy_from_user(buff, buffer, num)) return -EFAULT; buff[num] = '\0'; k = simple_strtoul(buff, NULL, 10); if (k <= 1048576) { /* limit "big buff" to 1 MB */ sg_big_buff = k; return count; } return -ERANGE; } static int sg_proc_seq_show_version(struct seq_file *s, void *v) { seq_printf(s, "%d\t%s [%s] ", sg_version_num, SG_VERSION_STR, sg_version_date); return 0; } static int sg_proc_single_open_version(struct inode *inode, struct file *file) { return single_open(file, sg_proc_seq_show_version, NULL); } static int sg_proc_seq_show_devhdr(struct seq_file *s, void *v) { seq_printf(s, "host\tchan\tid\tlun\ttype\topens\tqdepth\tbusy\t" "online "); return 0; } static int sg_proc_single_open_devhdr(struct inode *inode, struct file *file) { return single_open(file, sg_proc_seq_show_devhdr, NULL); } struct sg_proc_deviter { loff_t index; size_t max; }; static void * dev_seq_start(struct seq_file *s, loff_t *pos) { struct sg_proc_deviter * it = kmalloc(sizeof(*it), GFP_KERNEL); |
729d70f5d [PATCH] sg.c: fix... |
2434 |
s->private = it; |
1da177e4c Linux-2.6.12-rc2 |
2435 2436 |
if (! it) return NULL; |
729d70f5d [PATCH] sg.c: fix... |
2437 |
|
1da177e4c Linux-2.6.12-rc2 |
2438 2439 2440 |
it->index = *pos; it->max = sg_last_dev(); if (it->index >= it->max) |
729d70f5d [PATCH] sg.c: fix... |
2441 |
return NULL; |
1da177e4c Linux-2.6.12-rc2 |
2442 |
return it; |
1da177e4c Linux-2.6.12-rc2 |
2443 2444 2445 2446 |
} static void * dev_seq_next(struct seq_file *s, void *v, loff_t *pos) { |
729d70f5d [PATCH] sg.c: fix... |
2447 |
struct sg_proc_deviter * it = s->private; |
1da177e4c Linux-2.6.12-rc2 |
2448 2449 2450 2451 2452 2453 2454 |
*pos = ++it->index; return (it->index < it->max) ? it : NULL; } static void dev_seq_stop(struct seq_file *s, void *v) { |
729d70f5d [PATCH] sg.c: fix... |
2455 |
kfree(s->private); |
1da177e4c Linux-2.6.12-rc2 |
2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 |
} static int sg_proc_open_dev(struct inode *inode, struct file *file) { return seq_open(file, &dev_seq_ops); } static int sg_proc_seq_show_dev(struct seq_file *s, void *v) { struct sg_proc_deviter * it = (struct sg_proc_deviter *) v; Sg_device *sdp; struct scsi_device *scsidp; |
c6517b794 [SCSI] sg: fix ra... |
2468 |
unsigned long iflags; |
1da177e4c Linux-2.6.12-rc2 |
2469 |
|
c6517b794 [SCSI] sg: fix ra... |
2470 2471 |
read_lock_irqsave(&sg_index_lock, iflags); sdp = it ? sg_lookup_dev(it->index) : NULL; |
1da177e4c Linux-2.6.12-rc2 |
2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 |
if (sdp && (scsidp = sdp->device) && (!sdp->detached)) seq_printf(s, "%d\t%d\t%d\t%d\t%d\t%d\t%d\t%d\t%d ", scsidp->host->host_no, scsidp->channel, scsidp->id, scsidp->lun, (int) scsidp->type, 1, (int) scsidp->queue_depth, (int) scsidp->device_busy, (int) scsi_device_online(scsidp)); else seq_printf(s, "-1\t-1\t-1\t-1\t-1\t-1\t-1\t-1\t-1 "); |
c6517b794 [SCSI] sg: fix ra... |
2484 |
read_unlock_irqrestore(&sg_index_lock, iflags); |
1da177e4c Linux-2.6.12-rc2 |
2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 |
return 0; } static int sg_proc_open_devstrs(struct inode *inode, struct file *file) { return seq_open(file, &devstrs_seq_ops); } static int sg_proc_seq_show_devstrs(struct seq_file *s, void *v) { struct sg_proc_deviter * it = (struct sg_proc_deviter *) v; Sg_device *sdp; struct scsi_device *scsidp; |
c6517b794 [SCSI] sg: fix ra... |
2498 |
unsigned long iflags; |
1da177e4c Linux-2.6.12-rc2 |
2499 |
|
c6517b794 [SCSI] sg: fix ra... |
2500 2501 |
read_lock_irqsave(&sg_index_lock, iflags); sdp = it ? sg_lookup_dev(it->index) : NULL; |
1da177e4c Linux-2.6.12-rc2 |
2502 2503 2504 2505 2506 2507 2508 |
if (sdp && (scsidp = sdp->device) && (!sdp->detached)) seq_printf(s, "%8.8s\t%16.16s\t%4.4s ", scsidp->vendor, scsidp->model, scsidp->rev); else seq_printf(s, "<no active device> "); |
c6517b794 [SCSI] sg: fix ra... |
2509 |
read_unlock_irqrestore(&sg_index_lock, iflags); |
1da177e4c Linux-2.6.12-rc2 |
2510 2511 |
return 0; } |
c6517b794 [SCSI] sg: fix ra... |
2512 |
/* must be called while holding sg_index_lock */ |
1da177e4c Linux-2.6.12-rc2 |
2513 2514 2515 2516 2517 2518 2519 |
static void sg_proc_debug_helper(struct seq_file *s, Sg_device * sdp) { int k, m, new_interface, blen, usg; Sg_request *srp; Sg_fd *fp; const sg_io_hdr_t *hp; const char * cp; |
cb59e8408 [PATCH] sg.c: update |
2520 |
unsigned int ms; |
1da177e4c Linux-2.6.12-rc2 |
2521 |
|
3442f802a [SCSI] sg: remove... |
2522 2523 2524 |
k = 0; list_for_each_entry(fp, &sdp->sfds, sfd_siblings) { k++; |
c6517b794 [SCSI] sg: fix ra... |
2525 |
read_lock(&fp->rq_list_lock); /* irqs already disabled */ |
1da177e4c Linux-2.6.12-rc2 |
2526 |
seq_printf(s, " FD(%d): timeout=%dms bufflen=%d " |
3442f802a [SCSI] sg: remove... |
2527 2528 |
"(res)sgat=%d low_dma=%d ", k, |
1da177e4c Linux-2.6.12-rc2 |
2529 2530 2531 2532 2533 2534 2535 2536 |
jiffies_to_msecs(fp->timeout), fp->reserve.bufflen, (int) fp->reserve.k_use_sg, (int) fp->low_dma); seq_printf(s, " cmd_q=%d f_packid=%d k_orphan=%d closed=%d ", (int) fp->cmd_q, (int) fp->force_packid, (int) fp->keep_orphan, (int) fp->closed); |
c6517b794 [SCSI] sg: fix ra... |
2537 2538 2539 |
for (m = 0, srp = fp->headrp; srp != NULL; ++m, srp = srp->nextrp) { |
1da177e4c Linux-2.6.12-rc2 |
2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 |
hp = &srp->header; new_interface = (hp->interface_id == '\0') ? 0 : 1; if (srp->res_used) { if (new_interface && (SG_FLAG_MMAP_IO & hp->flags)) cp = " mmap>> "; else cp = " rb>> "; } else { if (SG_INFO_DIRECT_IO_MASK & hp->info) cp = " dio>> "; else cp = " "; } seq_printf(s, cp); |
d6b10348f [SCSI] convert sg... |
2555 2556 |
blen = srp->data.bufflen; usg = srp->data.k_use_sg; |
1da177e4c Linux-2.6.12-rc2 |
2557 2558 |
seq_printf(s, srp->done ? ((1 == srp->done) ? "rcv:" : "fin:") |
d6b10348f [SCSI] convert sg... |
2559 |
: "act:"); |
1da177e4c Linux-2.6.12-rc2 |
2560 2561 2562 2563 |
seq_printf(s, " id=%d blen=%d", srp->header.pack_id, blen); if (srp->done) seq_printf(s, " dur=%d", hp->duration); |
cb59e8408 [PATCH] sg.c: update |
2564 2565 |
else { ms = jiffies_to_msecs(jiffies); |
1da177e4c Linux-2.6.12-rc2 |
2566 |
seq_printf(s, " t_o/elap=%d/%d", |
cb59e8408 [PATCH] sg.c: update |
2567 2568 2569 2570 |
(new_interface ? hp->timeout : jiffies_to_msecs(fp->timeout)), (ms > hp->duration ? ms - hp->duration : 0)); } |
1da177e4c Linux-2.6.12-rc2 |
2571 2572 2573 2574 2575 2576 2577 |
seq_printf(s, "ms sgat=%d op=0x%02x ", usg, (int) srp->data.cmd_opcode); } if (0 == m) seq_printf(s, " No requests active "); |
c6517b794 [SCSI] sg: fix ra... |
2578 |
read_unlock(&fp->rq_list_lock); |
1da177e4c Linux-2.6.12-rc2 |
2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 |
} } static int sg_proc_open_debug(struct inode *inode, struct file *file) { return seq_open(file, &debug_seq_ops); } static int sg_proc_seq_show_debug(struct seq_file *s, void *v) { struct sg_proc_deviter * it = (struct sg_proc_deviter *) v; Sg_device *sdp; |
c6517b794 [SCSI] sg: fix ra... |
2591 |
unsigned long iflags; |
1da177e4c Linux-2.6.12-rc2 |
2592 2593 |
if (it && (0 == it->index)) { |
7c07d613d [SCSI] sg: use id... |
2594 2595 2596 |
seq_printf(s, "max_active_device=%d(origin 1) ", (int)it->max); |
1da177e4c Linux-2.6.12-rc2 |
2597 2598 2599 |
seq_printf(s, " def_reserved_size=%d ", sg_big_buff); } |
1da177e4c Linux-2.6.12-rc2 |
2600 |
|
c6517b794 [SCSI] sg: fix ra... |
2601 2602 |
read_lock_irqsave(&sg_index_lock, iflags); sdp = it ? sg_lookup_dev(it->index) : NULL; |
3442f802a [SCSI] sg: remove... |
2603 |
if (sdp && !list_empty(&sdp->sfds)) { |
c6517b794 [SCSI] sg: fix ra... |
2604 |
struct scsi_device *scsidp = sdp->device; |
1da177e4c Linux-2.6.12-rc2 |
2605 |
|
c6517b794 [SCSI] sg: fix ra... |
2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 |
seq_printf(s, " >>> device=%s ", sdp->disk->disk_name); if (sdp->detached) seq_printf(s, "detached pending close "); else seq_printf (s, "scsi%d chan=%d id=%d lun=%d em=%d", scsidp->host->host_no, scsidp->channel, scsidp->id, scsidp->lun, scsidp->host->hostt->emulated); seq_printf(s, " sg_tablesize=%d excl=%d ", sdp->sg_tablesize, sdp->exclude); |
1da177e4c Linux-2.6.12-rc2 |
2619 2620 |
sg_proc_debug_helper(s, sdp); } |
c6517b794 [SCSI] sg: fix ra... |
2621 |
read_unlock_irqrestore(&sg_index_lock, iflags); |
1da177e4c Linux-2.6.12-rc2 |
2622 2623 2624 2625 2626 2627 2628 |
return 0; } #endif /* CONFIG_SCSI_PROC_FS */ module_init(init_sg); module_exit(exit_sg); |