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path: root/arch/s390/hypfs/hypfs_diag.c
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Diffstat (limited to 'arch/s390/hypfs/hypfs_diag.c')
-rw-r--r--arch/s390/hypfs/hypfs_diag.c158
1 files changed, 55 insertions, 103 deletions
diff --git a/arch/s390/hypfs/hypfs_diag.c b/arch/s390/hypfs/hypfs_diag.c
index 1211bb1d2f2..5eeffeefae0 100644
--- a/arch/s390/hypfs/hypfs_diag.c
+++ b/arch/s390/hypfs/hypfs_diag.c
@@ -1,5 +1,4 @@
/*
- * arch/s390/hypfs/hypfs_diag.c
* Hypervisor filesystem for Linux on s390. Diag 204 and 224
* implementation.
*
@@ -555,80 +554,37 @@ struct dbfs_d204 {
char buf[]; /* d204 buffer */
} __attribute__ ((packed));
-struct dbfs_d204_private {
- struct dbfs_d204 *d204; /* Aligned d204 data with header */
- void *base; /* Base pointer (needed for vfree) */
-};
-
-static int dbfs_d204_open(struct inode *inode, struct file *file)
+static int dbfs_d204_create(void **data, void **data_free_ptr, size_t *size)
{
- struct dbfs_d204_private *data;
struct dbfs_d204 *d204;
int rc, buf_size;
+ void *base;
- data = kzalloc(sizeof(*data), GFP_KERNEL);
- if (!data)
- return -ENOMEM;
buf_size = PAGE_SIZE * (diag204_buf_pages + 1) + sizeof(d204->hdr);
- data->base = vmalloc(buf_size);
- if (!data->base) {
- rc = -ENOMEM;
- goto fail_kfree_data;
+ base = vzalloc(buf_size);
+ if (!base)
+ return -ENOMEM;
+ d204 = page_align_ptr(base + sizeof(d204->hdr)) - sizeof(d204->hdr);
+ rc = diag204_do_store(d204->buf, diag204_buf_pages);
+ if (rc) {
+ vfree(base);
+ return rc;
}
- memset(data->base, 0, buf_size);
- d204 = page_align_ptr(data->base + sizeof(d204->hdr))
- - sizeof(d204->hdr);
- rc = diag204_do_store(&d204->buf, diag204_buf_pages);
- if (rc)
- goto fail_vfree_base;
d204->hdr.version = DBFS_D204_HDR_VERSION;
d204->hdr.len = PAGE_SIZE * diag204_buf_pages;
d204->hdr.sc = diag204_store_sc;
- data->d204 = d204;
- file->private_data = data;
- return nonseekable_open(inode, file);
-
-fail_vfree_base:
- vfree(data->base);
-fail_kfree_data:
- kfree(data);
- return rc;
-}
-
-static int dbfs_d204_release(struct inode *inode, struct file *file)
-{
- struct dbfs_d204_private *data = file->private_data;
-
- vfree(data->base);
- kfree(data);
+ *data = d204;
+ *data_free_ptr = base;
+ *size = d204->hdr.len + sizeof(struct dbfs_d204_hdr);
return 0;
}
-static ssize_t dbfs_d204_read(struct file *file, char __user *buf,
- size_t size, loff_t *ppos)
-{
- struct dbfs_d204_private *data = file->private_data;
-
- return simple_read_from_buffer(buf, size, ppos, data->d204,
- data->d204->hdr.len +
- sizeof(data->d204->hdr));
-}
-
-static const struct file_operations dbfs_d204_ops = {
- .open = dbfs_d204_open,
- .read = dbfs_d204_read,
- .release = dbfs_d204_release,
+static struct hypfs_dbfs_file dbfs_file_d204 = {
+ .name = "diag_204",
+ .data_create = dbfs_d204_create,
+ .data_free = vfree,
};
-static int hypfs_dbfs_init(void)
-{
- dbfs_d204_file = debugfs_create_file("diag_204", 0400, hypfs_dbfs_dir,
- NULL, &dbfs_d204_ops);
- if (IS_ERR(dbfs_d204_file))
- return PTR_ERR(dbfs_d204_file);
- return 0;
-}
-
__init int hypfs_diag_init(void)
{
int rc;
@@ -637,18 +593,21 @@ __init int hypfs_diag_init(void)
pr_err("The hardware system does not support hypfs\n");
return -ENODATA;
}
- rc = diag224_get_name_table();
- if (rc) {
- diag204_free_buffer();
- pr_err("The hardware system does not provide all "
- "functions required by hypfs\n");
- }
if (diag204_info_type == INFO_EXT) {
- rc = hypfs_dbfs_init();
+ rc = hypfs_dbfs_create_file(&dbfs_file_d204);
if (rc)
- diag204_free_buffer();
+ return rc;
}
- return rc;
+ if (MACHINE_IS_LPAR) {
+ rc = diag224_get_name_table();
+ if (rc) {
+ pr_err("The hardware system does not provide all "
+ "functions required by hypfs\n");
+ debugfs_remove(dbfs_d204_file);
+ return rc;
+ }
+ }
+ return 0;
}
void hypfs_diag_exit(void)
@@ -656,6 +615,7 @@ void hypfs_diag_exit(void)
debugfs_remove(dbfs_d204_file);
diag224_delete_name_table();
diag204_free_buffer();
+ hypfs_dbfs_remove_file(&dbfs_file_d204);
}
/*
@@ -663,8 +623,7 @@ void hypfs_diag_exit(void)
* *******************************************
*/
-static int hypfs_create_cpu_files(struct super_block *sb,
- struct dentry *cpus_dir, void *cpu_info)
+static int hypfs_create_cpu_files(struct dentry *cpus_dir, void *cpu_info)
{
struct dentry *cpu_dir;
char buffer[TMP_SIZE];
@@ -672,32 +631,29 @@ static int hypfs_create_cpu_files(struct super_block *sb,
snprintf(buffer, TMP_SIZE, "%d", cpu_info__cpu_addr(diag204_info_type,
cpu_info));
- cpu_dir = hypfs_mkdir(sb, cpus_dir, buffer);
- rc = hypfs_create_u64(sb, cpu_dir, "mgmtime",
+ cpu_dir = hypfs_mkdir(cpus_dir, buffer);
+ rc = hypfs_create_u64(cpu_dir, "mgmtime",
cpu_info__acc_time(diag204_info_type, cpu_info) -
cpu_info__lp_time(diag204_info_type, cpu_info));
if (IS_ERR(rc))
return PTR_ERR(rc);
- rc = hypfs_create_u64(sb, cpu_dir, "cputime",
+ rc = hypfs_create_u64(cpu_dir, "cputime",
cpu_info__lp_time(diag204_info_type, cpu_info));
if (IS_ERR(rc))
return PTR_ERR(rc);
if (diag204_info_type == INFO_EXT) {
- rc = hypfs_create_u64(sb, cpu_dir, "onlinetime",
+ rc = hypfs_create_u64(cpu_dir, "onlinetime",
cpu_info__online_time(diag204_info_type,
cpu_info));
if (IS_ERR(rc))
return PTR_ERR(rc);
}
diag224_idx2name(cpu_info__ctidx(diag204_info_type, cpu_info), buffer);
- rc = hypfs_create_str(sb, cpu_dir, "type", buffer);
- if (IS_ERR(rc))
- return PTR_ERR(rc);
- return 0;
+ rc = hypfs_create_str(cpu_dir, "type", buffer);
+ return PTR_RET(rc);
}
-static void *hypfs_create_lpar_files(struct super_block *sb,
- struct dentry *systems_dir, void *part_hdr)
+static void *hypfs_create_lpar_files(struct dentry *systems_dir, void *part_hdr)
{
struct dentry *cpus_dir;
struct dentry *lpar_dir;
@@ -707,16 +663,16 @@ static void *hypfs_create_lpar_files(struct super_block *sb,
part_hdr__part_name(diag204_info_type, part_hdr, lpar_name);
lpar_name[LPAR_NAME_LEN] = 0;
- lpar_dir = hypfs_mkdir(sb, systems_dir, lpar_name);
+ lpar_dir = hypfs_mkdir(systems_dir, lpar_name);
if (IS_ERR(lpar_dir))
return lpar_dir;
- cpus_dir = hypfs_mkdir(sb, lpar_dir, "cpus");
+ cpus_dir = hypfs_mkdir(lpar_dir, "cpus");
if (IS_ERR(cpus_dir))
return cpus_dir;
cpu_info = part_hdr + part_hdr__size(diag204_info_type);
for (i = 0; i < part_hdr__rcpus(diag204_info_type, part_hdr); i++) {
int rc;
- rc = hypfs_create_cpu_files(sb, cpus_dir, cpu_info);
+ rc = hypfs_create_cpu_files(cpus_dir, cpu_info);
if (rc)
return ERR_PTR(rc);
cpu_info += cpu_info__size(diag204_info_type);
@@ -724,8 +680,7 @@ static void *hypfs_create_lpar_files(struct super_block *sb,
return cpu_info;
}
-static int hypfs_create_phys_cpu_files(struct super_block *sb,
- struct dentry *cpus_dir, void *cpu_info)
+static int hypfs_create_phys_cpu_files(struct dentry *cpus_dir, void *cpu_info)
{
struct dentry *cpu_dir;
char buffer[TMP_SIZE];
@@ -733,34 +688,31 @@ static int hypfs_create_phys_cpu_files(struct super_block *sb,
snprintf(buffer, TMP_SIZE, "%i", phys_cpu__cpu_addr(diag204_info_type,
cpu_info));
- cpu_dir = hypfs_mkdir(sb, cpus_dir, buffer);
+ cpu_dir = hypfs_mkdir(cpus_dir, buffer);
if (IS_ERR(cpu_dir))
return PTR_ERR(cpu_dir);
- rc = hypfs_create_u64(sb, cpu_dir, "mgmtime",
+ rc = hypfs_create_u64(cpu_dir, "mgmtime",
phys_cpu__mgm_time(diag204_info_type, cpu_info));
if (IS_ERR(rc))
return PTR_ERR(rc);
diag224_idx2name(phys_cpu__ctidx(diag204_info_type, cpu_info), buffer);
- rc = hypfs_create_str(sb, cpu_dir, "type", buffer);
- if (IS_ERR(rc))
- return PTR_ERR(rc);
- return 0;
+ rc = hypfs_create_str(cpu_dir, "type", buffer);
+ return PTR_RET(rc);
}
-static void *hypfs_create_phys_files(struct super_block *sb,
- struct dentry *parent_dir, void *phys_hdr)
+static void *hypfs_create_phys_files(struct dentry *parent_dir, void *phys_hdr)
{
int i;
void *cpu_info;
struct dentry *cpus_dir;
- cpus_dir = hypfs_mkdir(sb, parent_dir, "cpus");
+ cpus_dir = hypfs_mkdir(parent_dir, "cpus");
if (IS_ERR(cpus_dir))
return cpus_dir;
cpu_info = phys_hdr + phys_hdr__size(diag204_info_type);
for (i = 0; i < phys_hdr__cpus(diag204_info_type, phys_hdr); i++) {
int rc;
- rc = hypfs_create_phys_cpu_files(sb, cpus_dir, cpu_info);
+ rc = hypfs_create_phys_cpu_files(cpus_dir, cpu_info);
if (rc)
return ERR_PTR(rc);
cpu_info += phys_cpu__size(diag204_info_type);
@@ -768,7 +720,7 @@ static void *hypfs_create_phys_files(struct super_block *sb,
return cpu_info;
}
-int hypfs_diag_create_files(struct super_block *sb, struct dentry *root)
+int hypfs_diag_create_files(struct dentry *root)
{
struct dentry *systems_dir, *hyp_dir;
void *time_hdr, *part_hdr;
@@ -779,7 +731,7 @@ int hypfs_diag_create_files(struct super_block *sb, struct dentry *root)
if (IS_ERR(buffer))
return PTR_ERR(buffer);
- systems_dir = hypfs_mkdir(sb, root, "systems");
+ systems_dir = hypfs_mkdir(root, "systems");
if (IS_ERR(systems_dir)) {
rc = PTR_ERR(systems_dir);
goto err_out;
@@ -787,25 +739,25 @@ int hypfs_diag_create_files(struct super_block *sb, struct dentry *root)
time_hdr = (struct x_info_blk_hdr *)buffer;
part_hdr = time_hdr + info_blk_hdr__size(diag204_info_type);
for (i = 0; i < info_blk_hdr__npar(diag204_info_type, time_hdr); i++) {
- part_hdr = hypfs_create_lpar_files(sb, systems_dir, part_hdr);
+ part_hdr = hypfs_create_lpar_files(systems_dir, part_hdr);
if (IS_ERR(part_hdr)) {
rc = PTR_ERR(part_hdr);
goto err_out;
}
}
if (info_blk_hdr__flags(diag204_info_type, time_hdr) & LPAR_PHYS_FLG) {
- ptr = hypfs_create_phys_files(sb, root, part_hdr);
+ ptr = hypfs_create_phys_files(root, part_hdr);
if (IS_ERR(ptr)) {
rc = PTR_ERR(ptr);
goto err_out;
}
}
- hyp_dir = hypfs_mkdir(sb, root, "hyp");
+ hyp_dir = hypfs_mkdir(root, "hyp");
if (IS_ERR(hyp_dir)) {
rc = PTR_ERR(hyp_dir);
goto err_out;
}
- ptr = hypfs_create_str(sb, hyp_dir, "type", "LPAR Hypervisor");
+ ptr = hypfs_create_str(hyp_dir, "type", "LPAR Hypervisor");
if (IS_ERR(ptr)) {
rc = PTR_ERR(ptr);
goto err_out;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-13 11:00:49 +0000