diff options
Diffstat (limited to 'drivers/target/target_core_file.c')
| -rw-r--r-- | drivers/target/target_core_file.c | 713 |
1 files changed, 533 insertions, 180 deletions
diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c index 0360383dfb9..7d6cddaec52 100644 --- a/drivers/target/target_core_file.c +++ b/drivers/target/target_core_file.c @@ -3,10 +3,7 @@ * * This file contains the Storage Engine <-> FILEIO transport specific functions * - * Copyright (c) 2005 PyX Technologies, Inc. - * Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved. - * Copyright (c) 2007-2010 Rising Tide Systems - * Copyright (c) 2008-2010 Linux-iSCSI.org + * (c) Copyright 2005-2013 Datera, Inc. * * Nicholas A. Bellinger <nab@kernel.org> * @@ -33,15 +30,20 @@ #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/module.h> +#include <linux/falloc.h> #include <scsi/scsi.h> #include <scsi/scsi_host.h> +#include <asm/unaligned.h> #include <target/target_core_base.h> #include <target/target_core_backend.h> #include "target_core_file.h" -static struct se_subsystem_api fileio_template; +static inline struct fd_dev *FD_DEV(struct se_device *dev) +{ + return container_of(dev, struct fd_dev, dev); +} /* fd_attach_hba(): (Part of se_subsystem_api_t template) * @@ -64,9 +66,8 @@ static int fd_attach_hba(struct se_hba *hba, u32 host_id) pr_debug("CORE_HBA[%d] - TCM FILEIO HBA Driver %s on Generic" " Target Core Stack %s\n", hba->hba_id, FD_VERSION, TARGET_CORE_MOD_VERSION); - pr_debug("CORE_HBA[%d] - Attached FILEIO HBA: %u to Generic" - " MaxSectors: %u\n", - hba->hba_id, fd_host->fd_host_id, FD_MAX_SECTORS); + pr_debug("CORE_HBA[%d] - Attached FILEIO HBA: %u to Generic\n", + hba->hba_id, fd_host->fd_host_id); return 0; } @@ -82,7 +83,7 @@ static void fd_detach_hba(struct se_hba *hba) hba->hba_ptr = NULL; } -static void *fd_allocate_virtdevice(struct se_hba *hba, const char *name) +static struct se_device *fd_alloc_device(struct se_hba *hba, const char *name) { struct fd_dev *fd_dev; struct fd_host *fd_host = hba->hba_ptr; @@ -97,34 +98,28 @@ static void *fd_allocate_virtdevice(struct se_hba *hba, const char *name) pr_debug("FILEIO: Allocated fd_dev for %p\n", name); - return fd_dev; + return &fd_dev->dev; } -/* fd_create_virtdevice(): (Part of se_subsystem_api_t template) - * - * - */ -static struct se_device *fd_create_virtdevice( - struct se_hba *hba, - struct se_subsystem_dev *se_dev, - void *p) +static int fd_configure_device(struct se_device *dev) { - struct se_device *dev; - struct se_dev_limits dev_limits; - struct queue_limits *limits; - struct fd_dev *fd_dev = p; - struct fd_host *fd_host = hba->hba_ptr; + struct fd_dev *fd_dev = FD_DEV(dev); + struct fd_host *fd_host = dev->se_hba->hba_ptr; struct file *file; struct inode *inode = NULL; - int dev_flags = 0, flags, ret = -EINVAL; + int flags, ret = -EINVAL; - memset(&dev_limits, 0, sizeof(struct se_dev_limits)); + if (!(fd_dev->fbd_flags & FBDF_HAS_PATH)) { + pr_err("Missing fd_dev_name=\n"); + return -EINVAL; + } /* * Use O_DSYNC by default instead of O_SYNC to forgo syncing * of pure timestamp updates. */ flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; + /* * Optionally allow fd_buffered_io=1 to be enabled for people * who want use the fs buffer cache as an WriteCache mechanism. @@ -154,22 +149,14 @@ static struct se_device *fd_create_virtdevice( */ inode = file->f_mapping->host; if (S_ISBLK(inode->i_mode)) { - struct request_queue *q; + struct request_queue *q = bdev_get_queue(inode->i_bdev); unsigned long long dev_size; - /* - * Setup the local scope queue_limits from struct request_queue->limits - * to pass into transport_add_device_to_core_hba() as struct se_dev_limits. - */ - q = bdev_get_queue(inode->i_bdev); - limits = &dev_limits.limits; - limits->logical_block_size = bdev_logical_block_size(inode->i_bdev); - limits->max_hw_sectors = queue_max_hw_sectors(q); - limits->max_sectors = queue_max_sectors(q); + + fd_dev->fd_block_size = bdev_logical_block_size(inode->i_bdev); /* * Determine the number of bytes from i_size_read() minus * one (1) logical sector from underlying struct block_device */ - fd_dev->fd_block_size = bdev_logical_block_size(inode->i_bdev); dev_size = (i_size_read(file->f_mapping->host) - fd_dev->fd_block_size); @@ -177,6 +164,33 @@ static struct se_device *fd_create_virtdevice( " block_device blocks: %llu logical_block_size: %d\n", dev_size, div_u64(dev_size, fd_dev->fd_block_size), fd_dev->fd_block_size); + /* + * Check if the underlying struct block_device request_queue supports + * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM + * in ATA and we need to set TPE=1 + */ + if (blk_queue_discard(q)) { + dev->dev_attrib.max_unmap_lba_count = + q->limits.max_discard_sectors; + /* + * Currently hardcoded to 1 in Linux/SCSI code.. + */ + dev->dev_attrib.max_unmap_block_desc_count = 1; + dev->dev_attrib.unmap_granularity = + q->limits.discard_granularity >> 9; + dev->dev_attrib.unmap_granularity_alignment = + q->limits.discard_alignment; + pr_debug("IFILE: BLOCK Discard support available," + " disabled by default\n"); + } + /* + * Enable write same emulation for IBLOCK and use 0xFFFF as + * the smaller WRITE_SAME(10) only has a two-byte block count. + */ + dev->dev_attrib.max_write_same_len = 0xFFFF; + + if (blk_queue_nonrot(q)) + dev->dev_attrib.is_nonrot = 1; } else { if (!(fd_dev->fbd_flags & FBDF_HAS_SIZE)) { pr_err("FILEIO: Missing fd_dev_size=" @@ -185,26 +199,34 @@ static struct se_device *fd_create_virtdevice( goto fail; } - limits = &dev_limits.limits; - limits->logical_block_size = FD_BLOCKSIZE; - limits->max_hw_sectors = FD_MAX_SECTORS; - limits->max_sectors = FD_MAX_SECTORS; fd_dev->fd_block_size = FD_BLOCKSIZE; - } + /* + * Limit UNMAP emulation to 8k Number of LBAs (NoLB) + */ + dev->dev_attrib.max_unmap_lba_count = 0x2000; + /* + * Currently hardcoded to 1 in Linux/SCSI code.. + */ + dev->dev_attrib.max_unmap_block_desc_count = 1; + dev->dev_attrib.unmap_granularity = 1; + dev->dev_attrib.unmap_granularity_alignment = 0; - dev_limits.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH; - dev_limits.queue_depth = FD_DEVICE_QUEUE_DEPTH; + /* + * Limit WRITE_SAME w/ UNMAP=0 emulation to 8k Number of LBAs (NoLB) + * based upon struct iovec limit for vfs_writev() + */ + dev->dev_attrib.max_write_same_len = 0x1000; + } - dev = transport_add_device_to_core_hba(hba, &fileio_template, - se_dev, dev_flags, fd_dev, - &dev_limits, "FILEIO", FD_VERSION); - if (!dev) - goto fail; + dev->dev_attrib.hw_block_size = fd_dev->fd_block_size; + dev->dev_attrib.max_bytes_per_io = FD_MAX_BYTES; + dev->dev_attrib.hw_max_sectors = FD_MAX_BYTES / fd_dev->fd_block_size; + dev->dev_attrib.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH; if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { pr_debug("FILEIO: Forcing setting of emulate_write_cache=1" " with FDBD_HAS_BUFFERED_IO_WCE\n"); - dev->se_sub_dev->se_dev_attrib.emulate_write_cache = 1; + dev->dev_attrib.emulate_write_cache = 1; } fd_dev->fd_dev_id = fd_host->fd_host_dev_id_count++; @@ -214,22 +236,18 @@ static struct se_device *fd_create_virtdevice( " %llu total bytes\n", fd_host->fd_host_id, fd_dev->fd_dev_id, fd_dev->fd_dev_name, fd_dev->fd_dev_size); - return dev; + return 0; fail: if (fd_dev->fd_file) { filp_close(fd_dev->fd_file, NULL); fd_dev->fd_file = NULL; } - return ERR_PTR(ret); + return ret; } -/* fd_free_device(): (Part of se_subsystem_api_t template) - * - * - */ -static void fd_free_device(void *p) +static void fd_free_device(struct se_device *dev) { - struct fd_dev *fd_dev = p; + struct fd_dev *fd_dev = FD_DEV(dev); if (fd_dev->fd_file) { filp_close(fd_dev->fd_file, NULL); @@ -239,102 +257,144 @@ static void fd_free_device(void *p) kfree(fd_dev); } -static int fd_do_readv(struct se_cmd *cmd, struct scatterlist *sgl, - u32 sgl_nents) +static int fd_do_prot_rw(struct se_cmd *cmd, struct fd_prot *fd_prot, + int is_write) { struct se_device *se_dev = cmd->se_dev; - struct fd_dev *dev = se_dev->dev_ptr; - struct file *fd = dev->fd_file; + struct fd_dev *dev = FD_DEV(se_dev); + struct file *prot_fd = dev->fd_prot_file; struct scatterlist *sg; - struct iovec *iov; - mm_segment_t old_fs; - loff_t pos = (cmd->t_task_lba * - se_dev->se_sub_dev->se_dev_attrib.block_size); - int ret = 0, i; + loff_t pos = (cmd->t_task_lba * se_dev->prot_length); + unsigned char *buf; + u32 prot_size, len, size; + int rc, ret = 1, i; + + prot_size = (cmd->data_length / se_dev->dev_attrib.block_size) * + se_dev->prot_length; + + if (!is_write) { + fd_prot->prot_buf = vzalloc(prot_size); + if (!fd_prot->prot_buf) { + pr_err("Unable to allocate fd_prot->prot_buf\n"); + return -ENOMEM; + } + buf = fd_prot->prot_buf; + + fd_prot->prot_sg_nents = cmd->t_prot_nents; + fd_prot->prot_sg = kzalloc(sizeof(struct scatterlist) * + fd_prot->prot_sg_nents, GFP_KERNEL); + if (!fd_prot->prot_sg) { + pr_err("Unable to allocate fd_prot->prot_sg\n"); + vfree(fd_prot->prot_buf); + return -ENOMEM; + } + size = prot_size; - iov = kzalloc(sizeof(struct iovec) * sgl_nents, GFP_KERNEL); - if (!iov) { - pr_err("Unable to allocate fd_do_readv iov[]\n"); - return -ENOMEM; - } + for_each_sg(fd_prot->prot_sg, sg, fd_prot->prot_sg_nents, i) { - for_each_sg(sgl, sg, sgl_nents, i) { - iov[i].iov_len = sg->length; - iov[i].iov_base = sg_virt(sg); + len = min_t(u32, PAGE_SIZE, size); + sg_set_buf(sg, buf, len); + size -= len; + buf += len; + } } - old_fs = get_fs(); - set_fs(get_ds()); - ret = vfs_readv(fd, &iov[0], sgl_nents, &pos); - set_fs(old_fs); - - kfree(iov); - /* - * Return zeros and GOOD status even if the READ did not return - * the expected virt_size for struct file w/o a backing struct - * block_device. - */ - if (S_ISBLK(fd->f_dentry->d_inode->i_mode)) { - if (ret < 0 || ret != cmd->data_length) { - pr_err("vfs_readv() returned %d," - " expecting %d for S_ISBLK\n", ret, - (int)cmd->data_length); - return (ret < 0 ? ret : -EINVAL); + if (is_write) { + rc = kernel_write(prot_fd, fd_prot->prot_buf, prot_size, pos); + if (rc < 0 || prot_size != rc) { + pr_err("kernel_write() for fd_do_prot_rw failed:" + " %d\n", rc); + ret = -EINVAL; } } else { - if (ret < 0) { - pr_err("vfs_readv() returned %d for non" - " S_ISBLK\n", ret); - return ret; + rc = kernel_read(prot_fd, pos, fd_prot->prot_buf, prot_size); + if (rc < 0) { + pr_err("kernel_read() for fd_do_prot_rw failed:" + " %d\n", rc); + ret = -EINVAL; } } - return 1; + if (is_write || ret < 0) { + kfree(fd_prot->prot_sg); + vfree(fd_prot->prot_buf); + } + + return ret; } -static int fd_do_writev(struct se_cmd *cmd, struct scatterlist *sgl, - u32 sgl_nents) +static int fd_do_rw(struct se_cmd *cmd, struct scatterlist *sgl, + u32 sgl_nents, int is_write) { struct se_device *se_dev = cmd->se_dev; - struct fd_dev *dev = se_dev->dev_ptr; + struct fd_dev *dev = FD_DEV(se_dev); struct file *fd = dev->fd_file; struct scatterlist *sg; struct iovec *iov; mm_segment_t old_fs; - loff_t pos = (cmd->t_task_lba * - se_dev->se_sub_dev->se_dev_attrib.block_size); - int ret, i = 0; + loff_t pos = (cmd->t_task_lba * se_dev->dev_attrib.block_size); + int ret = 0, i; iov = kzalloc(sizeof(struct iovec) * sgl_nents, GFP_KERNEL); if (!iov) { - pr_err("Unable to allocate fd_do_writev iov[]\n"); + pr_err("Unable to allocate fd_do_readv iov[]\n"); return -ENOMEM; } for_each_sg(sgl, sg, sgl_nents, i) { iov[i].iov_len = sg->length; - iov[i].iov_base = sg_virt(sg); + iov[i].iov_base = kmap(sg_page(sg)) + sg->offset; } old_fs = get_fs(); set_fs(get_ds()); - ret = vfs_writev(fd, &iov[0], sgl_nents, &pos); + + if (is_write) + ret = vfs_writev(fd, &iov[0], sgl_nents, &pos); + else + ret = vfs_readv(fd, &iov[0], sgl_nents, &pos); + set_fs(old_fs); + for_each_sg(sgl, sg, sgl_nents, i) + kunmap(sg_page(sg)); + kfree(iov); - if (ret < 0 || ret != cmd->data_length) { - pr_err("vfs_writev() returned %d\n", ret); - return (ret < 0 ? ret : -EINVAL); + if (is_write) { + if (ret < 0 || ret != cmd->data_length) { + pr_err("%s() write returned %d\n", __func__, ret); + return (ret < 0 ? ret : -EINVAL); + } + } else { + /* + * Return zeros and GOOD status even if the READ did not return + * the expected virt_size for struct file w/o a backing struct + * block_device. + */ + if (S_ISBLK(file_inode(fd)->i_mode)) { + if (ret < 0 || ret != cmd->data_length) { + pr_err("%s() returned %d, expecting %u for " + "S_ISBLK\n", __func__, ret, + cmd->data_length); + return (ret < 0 ? ret : -EINVAL); + } + } else { + if (ret < 0) { + pr_err("%s() returned %d for non S_ISBLK\n", + __func__, ret); + return ret; + } + } } - return 1; } -static int fd_execute_sync_cache(struct se_cmd *cmd) +static sense_reason_t +fd_execute_sync_cache(struct se_cmd *cmd) { struct se_device *dev = cmd->se_dev; - struct fd_dev *fd_dev = dev->dev_ptr; + struct fd_dev *fd_dev = FD_DEV(dev); int immed = (cmd->t_task_cdb[1] & 0x2); loff_t start, end; int ret; @@ -353,7 +413,7 @@ static int fd_execute_sync_cache(struct se_cmd *cmd) start = 0; end = LLONG_MAX; } else { - start = cmd->t_task_lba * dev->se_sub_dev->se_dev_attrib.block_size; + start = cmd->t_task_lba * dev->dev_attrib.block_size; if (cmd->data_length) end = start + cmd->data_length; else @@ -367,22 +427,198 @@ static int fd_execute_sync_cache(struct se_cmd *cmd) if (immed) return 0; - if (ret) { - cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + if (ret) target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); + else + target_complete_cmd(cmd, SAM_STAT_GOOD); + + return 0; +} + +static unsigned char * +fd_setup_write_same_buf(struct se_cmd *cmd, struct scatterlist *sg, + unsigned int len) +{ + struct se_device *se_dev = cmd->se_dev; + unsigned int block_size = se_dev->dev_attrib.block_size; + unsigned int i = 0, end; + unsigned char *buf, *p, *kmap_buf; + + buf = kzalloc(min_t(unsigned int, len, PAGE_SIZE), GFP_KERNEL); + if (!buf) { + pr_err("Unable to allocate fd_execute_write_same buf\n"); + return NULL; + } + + kmap_buf = kmap(sg_page(sg)) + sg->offset; + if (!kmap_buf) { + pr_err("kmap() failed in fd_setup_write_same\n"); + kfree(buf); + return NULL; + } + /* + * Fill local *buf to contain multiple WRITE_SAME blocks up to + * min(len, PAGE_SIZE) + */ + p = buf; + end = min_t(unsigned int, len, PAGE_SIZE); + + while (i < end) { + memcpy(p, kmap_buf, block_size); + + i += block_size; + p += block_size; + } + kunmap(sg_page(sg)); + + return buf; +} + +static sense_reason_t +fd_execute_write_same(struct se_cmd *cmd) +{ + struct se_device *se_dev = cmd->se_dev; + struct fd_dev *fd_dev = FD_DEV(se_dev); + struct file *f = fd_dev->fd_file; + struct scatterlist *sg; + struct iovec *iov; + mm_segment_t old_fs; + sector_t nolb = sbc_get_write_same_sectors(cmd); + loff_t pos = cmd->t_task_lba * se_dev->dev_attrib.block_size; + unsigned int len, len_tmp, iov_num; + int i, rc; + unsigned char *buf; + + if (!nolb) { + target_complete_cmd(cmd, SAM_STAT_GOOD); + return 0; + } + sg = &cmd->t_data_sg[0]; + + if (cmd->t_data_nents > 1 || + sg->length != cmd->se_dev->dev_attrib.block_size) { + pr_err("WRITE_SAME: Illegal SGL t_data_nents: %u length: %u" + " block_size: %u\n", cmd->t_data_nents, sg->length, + cmd->se_dev->dev_attrib.block_size); + return TCM_INVALID_CDB_FIELD; + } + + len = len_tmp = nolb * se_dev->dev_attrib.block_size; + iov_num = DIV_ROUND_UP(len, PAGE_SIZE); + + buf = fd_setup_write_same_buf(cmd, sg, len); + if (!buf) + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + + iov = vzalloc(sizeof(struct iovec) * iov_num); + if (!iov) { + pr_err("Unable to allocate fd_execute_write_same iovecs\n"); + kfree(buf); + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + } + /* + * Map the single fabric received scatterlist block now populated + * in *buf into each iovec for I/O submission. + */ + for (i = 0; i < iov_num; i++) { + iov[i].iov_base = buf; + iov[i].iov_len = min_t(unsigned int, len_tmp, PAGE_SIZE); + len_tmp -= iov[i].iov_len; + } + + old_fs = get_fs(); + set_fs(get_ds()); + rc = vfs_writev(f, &iov[0], iov_num, &pos); + set_fs(old_fs); + + vfree(iov); + kfree(buf); + + if (rc < 0 || rc != len) { + pr_err("vfs_writev() returned %d for write same\n", rc); + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + } + + target_complete_cmd(cmd, SAM_STAT_GOOD); + return 0; +} + +static sense_reason_t +fd_do_unmap(struct se_cmd *cmd, void *priv, sector_t lba, sector_t nolb) +{ + struct file *file = priv; + struct inode *inode = file->f_mapping->host; + int ret; + + if (S_ISBLK(inode->i_mode)) { + /* The backend is block device, use discard */ + struct block_device *bdev = inode->i_bdev; + + ret = blkdev_issue_discard(bdev, lba, + nolb, GFP_KERNEL, 0); + if (ret < 0) { + pr_warn("FILEIO: blkdev_issue_discard() failed: %d\n", + ret); + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + } } else { + /* The backend is normal file, use fallocate */ + struct se_device *se_dev = cmd->se_dev; + loff_t pos = lba * se_dev->dev_attrib.block_size; + unsigned int len = nolb * se_dev->dev_attrib.block_size; + int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; + + if (!file->f_op->fallocate) + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + + ret = file->f_op->fallocate(file, mode, pos, len); + if (ret < 0) { + pr_warn("FILEIO: fallocate() failed: %d\n", ret); + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + } + } + + return 0; +} + +static sense_reason_t +fd_execute_write_same_unmap(struct se_cmd *cmd) +{ + struct se_device *se_dev = cmd->se_dev; + struct fd_dev *fd_dev = FD_DEV(se_dev); + struct file *file = fd_dev->fd_file; + sector_t lba = cmd->t_task_lba; + sector_t nolb = sbc_get_write_same_sectors(cmd); + int ret; + + if (!nolb) { target_complete_cmd(cmd, SAM_STAT_GOOD); + return 0; } + ret = fd_do_unmap(cmd, file, lba, nolb); + if (ret) + return ret; + + target_complete_cmd(cmd, GOOD); return 0; } -static int fd_execute_rw(struct se_cmd *cmd) +static sense_reason_t +fd_execute_unmap(struct se_cmd *cmd) +{ + struct file *file = FD_DEV(cmd->se_dev)->fd_file; + + return sbc_execute_unmap(cmd, fd_do_unmap, file); +} + +static sense_reason_t +fd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, + enum dma_data_direction data_direction) { - struct scatterlist *sgl = cmd->t_data_sg; - u32 sgl_nents = cmd->t_data_nents; - enum dma_data_direction data_direction = cmd->data_direction; struct se_device *dev = cmd->se_dev; + struct fd_prot fd_prot; + sense_reason_t rc; int ret = 0; /* @@ -390,30 +626,78 @@ static int fd_execute_rw(struct se_cmd *cmd) * physical memory addresses to struct iovec virtual memory. */ if (data_direction == DMA_FROM_DEVICE) { - ret = fd_do_readv(cmd, sgl, sgl_nents); + memset(&fd_prot, 0, sizeof(struct fd_prot)); + + if (cmd->prot_type) { + ret = fd_do_prot_rw(cmd, &fd_prot, false); + if (ret < 0) + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + } + + ret = fd_do_rw(cmd, sgl, sgl_nents, 0); + + if (ret > 0 && cmd->prot_type) { + u32 sectors = cmd->data_length / dev->dev_attrib.block_size; + + rc = sbc_dif_verify_read(cmd, cmd->t_task_lba, sectors, + 0, fd_prot.prot_sg, 0); + if (rc) { + kfree(fd_prot.prot_sg); + vfree(fd_prot.prot_buf); + return rc; + } + kfree(fd_prot.prot_sg); + vfree(fd_prot.prot_buf); + } } else { - ret = fd_do_writev(cmd, sgl, sgl_nents); + memset(&fd_prot, 0, sizeof(struct fd_prot)); + + if (cmd->prot_type) { + u32 sectors = cmd->data_length / dev->dev_attrib.block_size; + + ret = fd_do_prot_rw(cmd, &fd_prot, false); + if (ret < 0) + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + + rc = sbc_dif_verify_write(cmd, cmd->t_task_lba, sectors, + 0, fd_prot.prot_sg, 0); + if (rc) { + kfree(fd_prot.prot_sg); + vfree(fd_prot.prot_buf); + return rc; + } + } + + ret = fd_do_rw(cmd, sgl, sgl_nents, 1); /* - * Perform implict vfs_fsync_range() for fd_do_writev() ops + * Perform implicit vfs_fsync_range() for fd_do_writev() ops * for SCSI WRITEs with Forced Unit Access (FUA) set. * Allow this to happen independent of WCE=0 setting. */ if (ret > 0 && - dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0 && + dev->dev_attrib.emulate_fua_write > 0 && (cmd->se_cmd_flags & SCF_FUA)) { - struct fd_dev *fd_dev = dev->dev_ptr; + struct fd_dev *fd_dev = FD_DEV(dev); loff_t start = cmd->t_task_lba * - dev->se_sub_dev->se_dev_attrib.block_size; + dev->dev_attrib.block_size; loff_t end = start + cmd->data_length; vfs_fsync_range(fd_dev->fd_file, start, end, 1); } + + if (ret > 0 && cmd->prot_type) { + ret = fd_do_prot_rw(cmd, &fd_prot, true); + if (ret < 0) + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + } } if (ret < 0) { - cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; - return ret; + kfree(fd_prot.prot_sg); + vfree(fd_prot.prot_buf); + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; } + if (ret) target_complete_cmd(cmd, SAM_STAT_GOOD); return 0; @@ -430,12 +714,10 @@ static match_table_t tokens = { {Opt_err, NULL} }; -static ssize_t fd_set_configfs_dev_params( - struct se_hba *hba, - struct se_subsystem_dev *se_dev, - const char *page, ssize_t count) +static ssize_t fd_set_configfs_dev_params(struct se_device *dev, + const char *page, ssize_t count) { - struct fd_dev *fd_dev = se_dev->se_dev_su_ptr; + struct fd_dev *fd_dev = FD_DEV(dev); char *orig, *ptr, *arg_p, *opts; substring_t args[MAX_OPT_ARGS]; int ret = 0, arg, token; @@ -468,10 +750,10 @@ static ssize_t fd_set_configfs_dev_params( ret = -ENOMEM; break; } - ret = strict_strtoull(arg_p, 0, &fd_dev->fd_dev_size); + ret = kstrtoull(arg_p, 0, &fd_dev->fd_dev_size); kfree(arg_p); if (ret < 0) { - pr_err("strict_strtoull() failed for" + pr_err("kstrtoull() failed for" " fd_dev_size=\n"); goto out; } @@ -502,24 +784,9 @@ out: return (!ret) ? count : ret; } -static ssize_t fd_check_configfs_dev_params(struct se_hba *hba, struct se_subsystem_dev *se_dev) +static ssize_t fd_show_configfs_dev_params(struct se_device *dev, char *b) { - struct fd_dev *fd_dev = se_dev->se_dev_su_ptr; - - if (!(fd_dev->fbd_flags & FBDF_HAS_PATH)) { - pr_err("Missing fd_dev_name=\n"); - return -EINVAL; - } - - return 0; -} - -static ssize_t fd_show_configfs_dev_params( - struct se_hba *hba, - struct se_subsystem_dev *se_dev, - char *b) -{ - struct fd_dev *fd_dev = se_dev->se_dev_su_ptr; + struct fd_dev *fd_dev = FD_DEV(dev); ssize_t bl = 0; bl = sprintf(b + bl, "TCM FILEIO ID: %u", fd_dev->fd_dev_id); @@ -530,27 +797,9 @@ static ssize_t fd_show_configfs_dev_params( return bl; } -/* fd_get_device_rev(): (Part of se_subsystem_api_t template) - * - * - */ -static u32 fd_get_device_rev(struct se_device *dev) -{ - return SCSI_SPC_2; /* Returns SPC-3 in Initiator Data */ -} - -/* fd_get_device_type(): (Part of se_subsystem_api_t template) - * - * - */ -static u32 fd_get_device_type(struct se_device *dev) -{ - return TYPE_DISK; -} - static sector_t fd_get_blocks(struct se_device *dev) { - struct fd_dev *fd_dev = dev->dev_ptr; + struct fd_dev *fd_dev = FD_DEV(dev); struct file *f = fd_dev->fd_file; struct inode *i = f->f_mapping->host; unsigned long long dev_size; @@ -560,39 +809,143 @@ static sector_t fd_get_blocks(struct se_device *dev) * to handle underlying block_device resize operations. */ if (S_ISBLK(i->i_mode)) - dev_size = (i_size_read(i) - fd_dev->fd_block_size); + dev_size = i_size_read(i); else dev_size = fd_dev->fd_dev_size; - return div_u64(dev_size, dev->se_sub_dev->se_dev_attrib.block_size); + return div_u64(dev_size - dev->dev_attrib.block_size, + dev->dev_attrib.block_size); +} + +static int fd_init_prot(struct se_device *dev) +{ + struct fd_dev *fd_dev = FD_DEV(dev); + struct file *prot_file, *file = fd_dev->fd_file; + struct inode *inode; + int ret, flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; + char buf[FD_MAX_DEV_PROT_NAME]; + + if (!file) { + pr_err("Unable to locate fd_dev->fd_file\n"); + return -ENODEV; + } + + inode = file->f_mapping->host; + if (S_ISBLK(inode->i_mode)) { + pr_err("FILEIO Protection emulation only supported on" + " !S_ISBLK\n"); + return -ENOSYS; + } + + if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) + flags &= ~O_DSYNC; + + snprintf(buf, FD_MAX_DEV_PROT_NAME, "%s.protection", + fd_dev->fd_dev_name); + + prot_file = filp_open(buf, flags, 0600); + if (IS_ERR(prot_file)) { + pr_err("filp_open(%s) failed\n", buf); + ret = PTR_ERR(prot_file); + return ret; + } + fd_dev->fd_prot_file = prot_file; + + return 0; +} + +static int fd_format_prot(struct se_device *dev) +{ + struct fd_dev *fd_dev = FD_DEV(dev); + struct file *prot_fd = fd_dev->fd_prot_file; + sector_t prot_length, prot; + unsigned char *buf; + loff_t pos = 0; + int unit_size = FDBD_FORMAT_UNIT_SIZE * dev->dev_attrib.block_size; + int rc, ret = 0, size, len; + + if (!dev->dev_attrib.pi_prot_type) { + pr_err("Unable to format_prot while pi_prot_type == 0\n"); + return -ENODEV; + } + if (!prot_fd) { + pr_err("Unable to locate fd_dev->fd_prot_file\n"); + return -ENODEV; + } + + buf = vzalloc(unit_size); + if (!buf) { + pr_err("Unable to allocate FILEIO prot buf\n"); + return -ENOMEM; + } + prot_length = (dev->transport->get_blocks(dev) + 1) * dev->prot_length; + size = prot_length; + + pr_debug("Using FILEIO prot_length: %llu\n", + (unsigned long long)prot_length); + + memset(buf, 0xff, unit_size); + for (prot = 0; prot < prot_length; prot += unit_size) { + len = min(unit_size, size); + rc = kernel_write(prot_fd, buf, len, pos); + if (rc != len) { + pr_err("vfs_write to prot file failed: %d\n", rc); + ret = -ENODEV; + goto out; + } + pos += len; + size -= len; + } + +out: + vfree(buf); + return ret; +} + +static void fd_free_prot(struct se_device *dev) +{ + struct fd_dev *fd_dev = FD_DEV(dev); + + if (!fd_dev->fd_prot_file) + return; + + filp_close(fd_dev->fd_prot_file, NULL); + fd_dev->fd_prot_file = NULL; } -static struct spc_ops fd_spc_ops = { +static struct sbc_ops fd_sbc_ops = { .execute_rw = fd_execute_rw, .execute_sync_cache = fd_execute_sync_cache, + .execute_write_same = fd_execute_write_same, + .execute_write_same_unmap = fd_execute_write_same_unmap, + .execute_unmap = fd_execute_unmap, }; -static int fd_parse_cdb(struct se_cmd *cmd) +static sense_reason_t +fd_parse_cdb(struct se_cmd *cmd) { - return sbc_parse_cdb(cmd, &fd_spc_ops); + return sbc_parse_cdb(cmd, &fd_sbc_ops); } static struct se_subsystem_api fileio_template = { .name = "fileio", + .inquiry_prod = "FILEIO", + .inquiry_rev = FD_VERSION, .owner = THIS_MODULE, .transport_type = TRANSPORT_PLUGIN_VHBA_PDEV, .attach_hba = fd_attach_hba, .detach_hba = fd_detach_hba, - .allocate_virtdevice = fd_allocate_virtdevice, - .create_virtdevice = fd_create_virtdevice, + .alloc_device = fd_alloc_device, + .configure_device = fd_configure_device, .free_device = fd_free_device, .parse_cdb = fd_parse_cdb, - .check_configfs_dev_params = fd_check_configfs_dev_params, .set_configfs_dev_params = fd_set_configfs_dev_params, .show_configfs_dev_params = fd_show_configfs_dev_params, - .get_device_rev = fd_get_device_rev, - .get_device_type = fd_get_device_type, + .get_device_type = sbc_get_device_type, .get_blocks = fd_get_blocks, + .init_prot = fd_init_prot, + .format_prot = fd_format_prot, + .free_prot = fd_free_prot, }; static int __init fileio_module_init(void) @@ -600,7 +953,7 @@ static int __init fileio_module_init(void) return transport_subsystem_register(&fileio_template); } -static void fileio_module_exit(void) +static void __exit fileio_module_exit(void) { transport_subsystem_release(&fileio_template); } |