diff options
| -rw-r--r-- | drivers/nvme/target/debugfs.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/drivers/nvme/target/debugfs.c b/drivers/nvme/target/debugfs.c index e6f51eb59010..e85fe1d4c9f8 100644 --- a/drivers/nvme/target/debugfs.c +++ b/drivers/nvme/target/debugfs.c @@ -153,6 +153,86 @@ static int nvmet_ctrl_tls_concat_show(struct seq_file *m, void *p) NVMET_DEBUGFS_ATTR(nvmet_ctrl_tls_concat); #endif +static const char *const nvmet_pr_type_names[] = { + [NVME_PR_WRITE_EXCLUSIVE] = "write_exclusive", + [NVME_PR_EXCLUSIVE_ACCESS] = "exclusive_access", + [NVME_PR_WRITE_EXCLUSIVE_REG_ONLY] = "write_exclusive_reg_only", + [NVME_PR_EXCLUSIVE_ACCESS_REG_ONLY] = "exclusive_access_reg_only", + [NVME_PR_WRITE_EXCLUSIVE_ALL_REGS] = "write_exclusive_all_regs", + [NVME_PR_EXCLUSIVE_ACCESS_ALL_REGS] = "exclusive_access_all_regs", +}; + +static const char *nvmet_pr_type_to_str(enum nvme_pr_type type) +{ + if (type < ARRAY_SIZE(nvmet_pr_type_names) && + nvmet_pr_type_names[type]) + return nvmet_pr_type_names[type]; + return "unknown"; +} + +static const char *const nvmet_pr_notify_names[] = { + [NVME_PR_NOTIFY_BIT_REG_PREEMPTED] = "reg_preempted", + [NVME_PR_NOTIFY_BIT_RESV_RELEASED] = "resv_released", + [NVME_PR_NOTIFY_BIT_RESV_PREEMPTED] = "resv_preempted", +}; + +static void nvmet_pr_notify_mask_to_str(struct seq_file *m, unsigned long mask) +{ + bool sep = false; + int i; + + if (!mask) { + seq_puts(m, "none"); + return; + } + + for (i = 0; i < ARRAY_SIZE(nvmet_pr_notify_names); i++) { + if (!test_bit(i, &mask) || !nvmet_pr_notify_names[i]) + continue; + if (sep) + seq_putc(m, ','); + seq_puts(m, nvmet_pr_notify_names[i]); + sep = true; + } +} + +static int nvmet_ns_pr_show(struct seq_file *m, void *p) +{ + struct nvmet_ns *ns = m->private; + struct nvmet_pr *pr = &ns->pr; + struct nvmet_pr_registrant *holder, *reg; + + seq_printf(m, "enable=%d\n", pr->enable); + if (!pr->enable) + return 0; + + seq_printf(m, "generation=%u\n", atomic_read(&pr->generation)); + seq_puts(m, "notify_mask="); + nvmet_pr_notify_mask_to_str(m, pr->notify_mask); + seq_putc(m, '\n'); + + rcu_read_lock(); + holder = rcu_dereference(pr->holder); + if (holder) { + seq_printf(m, "rtype=%s\n", + nvmet_pr_type_to_str(holder->rtype)); + seq_printf(m, "holder=%pUb,0x%llx\n", + &holder->hostid, holder->rkey); + } else { + seq_puts(m, "rtype=none\n"); + seq_puts(m, "holder=none\n"); + } + + list_for_each_entry_rcu(reg, &pr->registrant_list, entry) { + seq_printf(m, "reg=%pUb,0x%llx\n", + ®->hostid, reg->rkey); + } + rcu_read_unlock(); + + return 0; +} +NVMET_DEBUGFS_ATTR(nvmet_ns_pr); + void nvmet_debugfs_ns_setup(struct nvmet_ns *ns) { char name[16]; @@ -166,6 +246,8 @@ void nvmet_debugfs_ns_setup(struct nvmet_ns *ns) ns->debugfs_dir = NULL; return; } + debugfs_create_file("reservation", 0400, ns->debugfs_dir, ns, + &nvmet_ns_pr_fops); } void nvmet_debugfs_ns_free(struct nvmet_ns *ns) |