diff options
Diffstat (limited to 'drivers/scsi/scsi_common.c')
| -rw-r--r-- | drivers/scsi/scsi_common.c | 73 |
1 files changed, 63 insertions, 10 deletions
diff --git a/drivers/scsi/scsi_common.c b/drivers/scsi/scsi_common.c index a75673bb82b3..e1a2a62b6910 100644 --- a/drivers/scsi/scsi_common.c +++ b/drivers/scsi/scsi_common.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * SCSI functions used by both the initiator and the target code. */ @@ -6,12 +7,23 @@ #include <linux/kernel.h> #include <linux/string.h> #include <linux/errno.h> -#include <asm/unaligned.h> +#include <linux/module.h> +#include <uapi/linux/pr.h> +#include <linux/unaligned.h> #include <scsi/scsi_common.h> +MODULE_DESCRIPTION("SCSI functions used by both the initiator and the target code"); +MODULE_LICENSE("GPL v2"); + +/* Command group 3 is reserved and should never be used. */ +const unsigned char scsi_command_size_tbl[8] = { + 6, 10, 10, 12, 16, 12, 10, 10 +}; +EXPORT_SYMBOL(scsi_command_size_tbl); + /* NB: These are exposed through /proc/scsi/scsi and form part of the ABI. * You may not alter any existing entry (although adding new ones is - * encouraged once assigned by ANSI/INCITS T10 + * encouraged once assigned by ANSI/INCITS T10). */ static const char *const scsi_device_types[] = { "Direct-Access ", @@ -38,7 +50,7 @@ static const char *const scsi_device_types[] = { }; /** - * scsi_device_type - Return 17 char string indicating device type. + * scsi_device_type - Return 17-char string indicating device type. * @type: type number to look up */ const char *scsi_device_type(unsigned type) @@ -53,12 +65,54 @@ const char *scsi_device_type(unsigned type) } EXPORT_SYMBOL(scsi_device_type); +enum pr_type scsi_pr_type_to_block(enum scsi_pr_type type) +{ + switch (type) { + case SCSI_PR_WRITE_EXCLUSIVE: + return PR_WRITE_EXCLUSIVE; + case SCSI_PR_EXCLUSIVE_ACCESS: + return PR_EXCLUSIVE_ACCESS; + case SCSI_PR_WRITE_EXCLUSIVE_REG_ONLY: + return PR_WRITE_EXCLUSIVE_REG_ONLY; + case SCSI_PR_EXCLUSIVE_ACCESS_REG_ONLY: + return PR_EXCLUSIVE_ACCESS_REG_ONLY; + case SCSI_PR_WRITE_EXCLUSIVE_ALL_REGS: + return PR_WRITE_EXCLUSIVE_ALL_REGS; + case SCSI_PR_EXCLUSIVE_ACCESS_ALL_REGS: + return PR_EXCLUSIVE_ACCESS_ALL_REGS; + } + + return 0; +} +EXPORT_SYMBOL_GPL(scsi_pr_type_to_block); + +enum scsi_pr_type block_pr_type_to_scsi(enum pr_type type) +{ + switch (type) { + case PR_WRITE_EXCLUSIVE: + return SCSI_PR_WRITE_EXCLUSIVE; + case PR_EXCLUSIVE_ACCESS: + return SCSI_PR_EXCLUSIVE_ACCESS; + case PR_WRITE_EXCLUSIVE_REG_ONLY: + return SCSI_PR_WRITE_EXCLUSIVE_REG_ONLY; + case PR_EXCLUSIVE_ACCESS_REG_ONLY: + return SCSI_PR_EXCLUSIVE_ACCESS_REG_ONLY; + case PR_WRITE_EXCLUSIVE_ALL_REGS: + return SCSI_PR_WRITE_EXCLUSIVE_ALL_REGS; + case PR_EXCLUSIVE_ACCESS_ALL_REGS: + return SCSI_PR_EXCLUSIVE_ACCESS_ALL_REGS; + } + + return 0; +} +EXPORT_SYMBOL_GPL(block_pr_type_to_scsi); + /** * scsilun_to_int - convert a scsi_lun to an int * @scsilun: struct scsi_lun to be converted. * * Description: - * Convert @scsilun from a struct scsi_lun to a four byte host byte-ordered + * Convert @scsilun from a struct scsi_lun to a four-byte host byte-ordered * integer, and return the result. The caller must check for * truncation before using this function. * @@ -97,7 +151,7 @@ EXPORT_SYMBOL(scsilun_to_int); * back into the lun value. * * Notes: - * Given an integer : 0x0b03d204, this function returns a + * Given an integer : 0x0b03d204, this function returns a * struct scsi_lun of: d2 04 0b 03 00 00 00 00 * */ @@ -166,8 +220,7 @@ bool scsi_normalize_sense(const u8 *sense_buffer, int sb_len, if (sb_len > 2) sshdr->sense_key = (sense_buffer[2] & 0xf); if (sb_len > 7) { - sb_len = (sb_len < (sense_buffer[7] + 8)) ? - sb_len : (sense_buffer[7] + 8); + sb_len = min(sb_len, sense_buffer[7] + 8); if (sb_len > 12) sshdr->asc = sense_buffer[12]; if (sb_len > 13) @@ -220,7 +273,7 @@ EXPORT_SYMBOL(scsi_sense_desc_find); /** * scsi_build_sense_buffer - build sense data in a buffer - * @desc: Sense format (non zero == descriptor format, + * @desc: Sense format (non-zero == descriptor format, * 0 == fixed format) * @buf: Where to build sense data * @key: Sense key @@ -254,7 +307,7 @@ EXPORT_SYMBOL(scsi_build_sense_buffer); * @info: 64-bit information value to be set * * Return value: - * 0 on success or EINVAL for invalid sense buffer length + * 0 on success or -EINVAL for invalid sense buffer length **/ int scsi_set_sense_information(u8 *buf, int buf_len, u64 info) { @@ -304,7 +357,7 @@ EXPORT_SYMBOL(scsi_set_sense_information); * @cd: command/data bit * * Return value: - * 0 on success or EINVAL for invalid sense buffer length + * 0 on success or -EINVAL for invalid sense buffer length */ int scsi_set_sense_field_pointer(u8 *buf, int buf_len, u16 fp, u8 bp, bool cd) { |