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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/arch/s390/hypfs | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip |
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/arch/s390/hypfs')
-rw-r--r-- | ANDROID_3.4.5/arch/s390/hypfs/Makefile | 7 | ||||
-rw-r--r-- | ANDROID_3.4.5/arch/s390/hypfs/hypfs.h | 72 | ||||
-rw-r--r-- | ANDROID_3.4.5/arch/s390/hypfs/hypfs_dbfs.c | 116 | ||||
-rw-r--r-- | ANDROID_3.4.5/arch/s390/hypfs/hypfs_diag.c | 778 | ||||
-rw-r--r-- | ANDROID_3.4.5/arch/s390/hypfs/hypfs_vm.c | 283 | ||||
-rw-r--r-- | ANDROID_3.4.5/arch/s390/hypfs/inode.c | 515 |
6 files changed, 0 insertions, 1771 deletions
diff --git a/ANDROID_3.4.5/arch/s390/hypfs/Makefile b/ANDROID_3.4.5/arch/s390/hypfs/Makefile deleted file mode 100644 index 2e671d50..00000000 --- a/ANDROID_3.4.5/arch/s390/hypfs/Makefile +++ /dev/null @@ -1,7 +0,0 @@ -# -# Makefile for the linux hypfs filesystem routines. -# - -obj-$(CONFIG_S390_HYPFS_FS) += s390_hypfs.o - -s390_hypfs-objs := inode.o hypfs_diag.o hypfs_vm.o hypfs_dbfs.o diff --git a/ANDROID_3.4.5/arch/s390/hypfs/hypfs.h b/ANDROID_3.4.5/arch/s390/hypfs/hypfs.h deleted file mode 100644 index d9df5a06..00000000 --- a/ANDROID_3.4.5/arch/s390/hypfs/hypfs.h +++ /dev/null @@ -1,72 +0,0 @@ -/* - * arch/s390/hypfs/hypfs.h - * Hypervisor filesystem for Linux on s390. - * - * Copyright (C) IBM Corp. 2006 - * Author(s): Michael Holzheu <holzheu@de.ibm.com> - */ - -#ifndef _HYPFS_H_ -#define _HYPFS_H_ - -#include <linux/fs.h> -#include <linux/types.h> -#include <linux/debugfs.h> -#include <linux/workqueue.h> -#include <linux/kref.h> - -#define REG_FILE_MODE 0440 -#define UPDATE_FILE_MODE 0220 -#define DIR_MODE 0550 - -extern struct dentry *hypfs_mkdir(struct super_block *sb, struct dentry *parent, - const char *name); - -extern struct dentry *hypfs_create_u64(struct super_block *sb, - struct dentry *dir, const char *name, - __u64 value); - -extern struct dentry *hypfs_create_str(struct super_block *sb, - struct dentry *dir, const char *name, - char *string); - -/* LPAR Hypervisor */ -extern int hypfs_diag_init(void); -extern void hypfs_diag_exit(void); -extern int hypfs_diag_create_files(struct super_block *sb, struct dentry *root); - -/* VM Hypervisor */ -extern int hypfs_vm_init(void); -extern void hypfs_vm_exit(void); -extern int hypfs_vm_create_files(struct super_block *sb, struct dentry *root); - -/* debugfs interface */ -struct hypfs_dbfs_file; - -struct hypfs_dbfs_data { - void *buf; - void *buf_free_ptr; - size_t size; - struct hypfs_dbfs_file *dbfs_file; - struct kref kref; -}; - -struct hypfs_dbfs_file { - const char *name; - int (*data_create)(void **data, void **data_free_ptr, - size_t *size); - void (*data_free)(const void *buf_free_ptr); - - /* Private data for hypfs_dbfs.c */ - struct hypfs_dbfs_data *data; - struct delayed_work data_free_work; - struct mutex lock; - struct dentry *dentry; -}; - -extern int hypfs_dbfs_init(void); -extern void hypfs_dbfs_exit(void); -extern int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df); -extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df); - -#endif /* _HYPFS_H_ */ diff --git a/ANDROID_3.4.5/arch/s390/hypfs/hypfs_dbfs.c b/ANDROID_3.4.5/arch/s390/hypfs/hypfs_dbfs.c deleted file mode 100644 index b478013b..00000000 --- a/ANDROID_3.4.5/arch/s390/hypfs/hypfs_dbfs.c +++ /dev/null @@ -1,116 +0,0 @@ -/* - * Hypervisor filesystem for Linux on s390 - debugfs interface - * - * Copyright (C) IBM Corp. 2010 - * Author(s): Michael Holzheu <holzheu@linux.vnet.ibm.com> - */ - -#include <linux/slab.h> -#include "hypfs.h" - -static struct dentry *dbfs_dir; - -static struct hypfs_dbfs_data *hypfs_dbfs_data_alloc(struct hypfs_dbfs_file *f) -{ - struct hypfs_dbfs_data *data; - - data = kmalloc(sizeof(*data), GFP_KERNEL); - if (!data) - return NULL; - kref_init(&data->kref); - data->dbfs_file = f; - return data; -} - -static void hypfs_dbfs_data_free(struct kref *kref) -{ - struct hypfs_dbfs_data *data; - - data = container_of(kref, struct hypfs_dbfs_data, kref); - data->dbfs_file->data_free(data->buf_free_ptr); - kfree(data); -} - -static void data_free_delayed(struct work_struct *work) -{ - struct hypfs_dbfs_data *data; - struct hypfs_dbfs_file *df; - - df = container_of(work, struct hypfs_dbfs_file, data_free_work.work); - mutex_lock(&df->lock); - data = df->data; - df->data = NULL; - mutex_unlock(&df->lock); - kref_put(&data->kref, hypfs_dbfs_data_free); -} - -static ssize_t dbfs_read(struct file *file, char __user *buf, - size_t size, loff_t *ppos) -{ - struct hypfs_dbfs_data *data; - struct hypfs_dbfs_file *df; - ssize_t rc; - - if (*ppos != 0) - return 0; - - df = file->f_path.dentry->d_inode->i_private; - mutex_lock(&df->lock); - if (!df->data) { - data = hypfs_dbfs_data_alloc(df); - if (!data) { - mutex_unlock(&df->lock); - return -ENOMEM; - } - rc = df->data_create(&data->buf, &data->buf_free_ptr, - &data->size); - if (rc) { - mutex_unlock(&df->lock); - kfree(data); - return rc; - } - df->data = data; - schedule_delayed_work(&df->data_free_work, HZ); - } - data = df->data; - kref_get(&data->kref); - mutex_unlock(&df->lock); - - rc = simple_read_from_buffer(buf, size, ppos, data->buf, data->size); - kref_put(&data->kref, hypfs_dbfs_data_free); - return rc; -} - -static const struct file_operations dbfs_ops = { - .read = dbfs_read, - .llseek = no_llseek, -}; - -int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df) -{ - df->dentry = debugfs_create_file(df->name, 0400, dbfs_dir, df, - &dbfs_ops); - if (IS_ERR(df->dentry)) - return PTR_ERR(df->dentry); - mutex_init(&df->lock); - INIT_DELAYED_WORK(&df->data_free_work, data_free_delayed); - return 0; -} - -void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df) -{ - debugfs_remove(df->dentry); -} - -int hypfs_dbfs_init(void) -{ - dbfs_dir = debugfs_create_dir("s390_hypfs", NULL); - if (IS_ERR(dbfs_dir)) - return PTR_ERR(dbfs_dir); - return 0; -} - -void hypfs_dbfs_exit(void) -{ - debugfs_remove(dbfs_dir); -} diff --git a/ANDROID_3.4.5/arch/s390/hypfs/hypfs_diag.c b/ANDROID_3.4.5/arch/s390/hypfs/hypfs_diag.c deleted file mode 100644 index 74c8f5e7..00000000 --- a/ANDROID_3.4.5/arch/s390/hypfs/hypfs_diag.c +++ /dev/null @@ -1,778 +0,0 @@ -/* - * arch/s390/hypfs/hypfs_diag.c - * Hypervisor filesystem for Linux on s390. Diag 204 and 224 - * implementation. - * - * Copyright IBM Corp. 2006, 2008 - * Author(s): Michael Holzheu <holzheu@de.ibm.com> - */ - -#define KMSG_COMPONENT "hypfs" -#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt - -#include <linux/types.h> -#include <linux/errno.h> -#include <linux/slab.h> -#include <linux/string.h> -#include <linux/vmalloc.h> -#include <linux/mm.h> -#include <asm/ebcdic.h> -#include "hypfs.h" - -#define LPAR_NAME_LEN 8 /* lpar name len in diag 204 data */ -#define CPU_NAME_LEN 16 /* type name len of cpus in diag224 name table */ -#define TMP_SIZE 64 /* size of temporary buffers */ - -#define DBFS_D204_HDR_VERSION 0 - -/* diag 204 subcodes */ -enum diag204_sc { - SUBC_STIB4 = 4, - SUBC_RSI = 5, - SUBC_STIB6 = 6, - SUBC_STIB7 = 7 -}; - -/* The two available diag 204 data formats */ -enum diag204_format { - INFO_SIMPLE = 0, - INFO_EXT = 0x00010000 -}; - -/* bit is set in flags, when physical cpu info is included in diag 204 data */ -#define LPAR_PHYS_FLG 0x80 - -static char *diag224_cpu_names; /* diag 224 name table */ -static enum diag204_sc diag204_store_sc; /* used subcode for store */ -static enum diag204_format diag204_info_type; /* used diag 204 data format */ - -static void *diag204_buf; /* 4K aligned buffer for diag204 data */ -static void *diag204_buf_vmalloc; /* vmalloc pointer for diag204 data */ -static int diag204_buf_pages; /* number of pages for diag204 data */ - -static struct dentry *dbfs_d204_file; - -/* - * DIAG 204 data structures and member access functions. - * - * Since we have two different diag 204 data formats for old and new s390 - * machines, we do not access the structs directly, but use getter functions for - * each struct member instead. This should make the code more readable. - */ - -/* Time information block */ - -struct info_blk_hdr { - __u8 npar; - __u8 flags; - __u16 tslice; - __u16 phys_cpus; - __u16 this_part; - __u64 curtod; -} __attribute__ ((packed)); - -struct x_info_blk_hdr { - __u8 npar; - __u8 flags; - __u16 tslice; - __u16 phys_cpus; - __u16 this_part; - __u64 curtod1; - __u64 curtod2; - char reserved[40]; -} __attribute__ ((packed)); - -static inline int info_blk_hdr__size(enum diag204_format type) -{ - if (type == INFO_SIMPLE) - return sizeof(struct info_blk_hdr); - else /* INFO_EXT */ - return sizeof(struct x_info_blk_hdr); -} - -static inline __u8 info_blk_hdr__npar(enum diag204_format type, void *hdr) -{ - if (type == INFO_SIMPLE) - return ((struct info_blk_hdr *)hdr)->npar; - else /* INFO_EXT */ - return ((struct x_info_blk_hdr *)hdr)->npar; -} - -static inline __u8 info_blk_hdr__flags(enum diag204_format type, void *hdr) -{ - if (type == INFO_SIMPLE) - return ((struct info_blk_hdr *)hdr)->flags; - else /* INFO_EXT */ - return ((struct x_info_blk_hdr *)hdr)->flags; -} - -static inline __u16 info_blk_hdr__pcpus(enum diag204_format type, void *hdr) -{ - if (type == INFO_SIMPLE) - return ((struct info_blk_hdr *)hdr)->phys_cpus; - else /* INFO_EXT */ - return ((struct x_info_blk_hdr *)hdr)->phys_cpus; -} - -/* Partition header */ - -struct part_hdr { - __u8 pn; - __u8 cpus; - char reserved[6]; - char part_name[LPAR_NAME_LEN]; -} __attribute__ ((packed)); - -struct x_part_hdr { - __u8 pn; - __u8 cpus; - __u8 rcpus; - __u8 pflag; - __u32 mlu; - char part_name[LPAR_NAME_LEN]; - char lpc_name[8]; - char os_name[8]; - __u64 online_cs; - __u64 online_es; - __u8 upid; - char reserved1[3]; - __u32 group_mlu; - char group_name[8]; - char reserved2[32]; -} __attribute__ ((packed)); - -static inline int part_hdr__size(enum diag204_format type) -{ - if (type == INFO_SIMPLE) - return sizeof(struct part_hdr); - else /* INFO_EXT */ - return sizeof(struct x_part_hdr); -} - -static inline __u8 part_hdr__rcpus(enum diag204_format type, void *hdr) -{ - if (type == INFO_SIMPLE) - return ((struct part_hdr *)hdr)->cpus; - else /* INFO_EXT */ - return ((struct x_part_hdr *)hdr)->rcpus; -} - -static inline void part_hdr__part_name(enum diag204_format type, void *hdr, - char *name) -{ - if (type == INFO_SIMPLE) - memcpy(name, ((struct part_hdr *)hdr)->part_name, - LPAR_NAME_LEN); - else /* INFO_EXT */ - memcpy(name, ((struct x_part_hdr *)hdr)->part_name, - LPAR_NAME_LEN); - EBCASC(name, LPAR_NAME_LEN); - name[LPAR_NAME_LEN] = 0; - strim(name); -} - -struct cpu_info { - __u16 cpu_addr; - char reserved1[2]; - __u8 ctidx; - __u8 cflag; - __u16 weight; - __u64 acc_time; - __u64 lp_time; -} __attribute__ ((packed)); - -struct x_cpu_info { - __u16 cpu_addr; - char reserved1[2]; - __u8 ctidx; - __u8 cflag; - __u16 weight; - __u64 acc_time; - __u64 lp_time; - __u16 min_weight; - __u16 cur_weight; - __u16 max_weight; - char reseved2[2]; - __u64 online_time; - __u64 wait_time; - __u32 pma_weight; - __u32 polar_weight; - char reserved3[40]; -} __attribute__ ((packed)); - -/* CPU info block */ - -static inline int cpu_info__size(enum diag204_format type) -{ - if (type == INFO_SIMPLE) - return sizeof(struct cpu_info); - else /* INFO_EXT */ - return sizeof(struct x_cpu_info); -} - -static inline __u8 cpu_info__ctidx(enum diag204_format type, void *hdr) -{ - if (type == INFO_SIMPLE) - return ((struct cpu_info *)hdr)->ctidx; - else /* INFO_EXT */ - return ((struct x_cpu_info *)hdr)->ctidx; -} - -static inline __u16 cpu_info__cpu_addr(enum diag204_format type, void *hdr) -{ - if (type == INFO_SIMPLE) - return ((struct cpu_info *)hdr)->cpu_addr; - else /* INFO_EXT */ - return ((struct x_cpu_info *)hdr)->cpu_addr; -} - -static inline __u64 cpu_info__acc_time(enum diag204_format type, void *hdr) -{ - if (type == INFO_SIMPLE) - return ((struct cpu_info *)hdr)->acc_time; - else /* INFO_EXT */ - return ((struct x_cpu_info *)hdr)->acc_time; -} - -static inline __u64 cpu_info__lp_time(enum diag204_format type, void *hdr) -{ - if (type == INFO_SIMPLE) - return ((struct cpu_info *)hdr)->lp_time; - else /* INFO_EXT */ - return ((struct x_cpu_info *)hdr)->lp_time; -} - -static inline __u64 cpu_info__online_time(enum diag204_format type, void *hdr) -{ - if (type == INFO_SIMPLE) - return 0; /* online_time not available in simple info */ - else /* INFO_EXT */ - return ((struct x_cpu_info *)hdr)->online_time; -} - -/* Physical header */ - -struct phys_hdr { - char reserved1[1]; - __u8 cpus; - char reserved2[6]; - char mgm_name[8]; -} __attribute__ ((packed)); - -struct x_phys_hdr { - char reserved1[1]; - __u8 cpus; - char reserved2[6]; - char mgm_name[8]; - char reserved3[80]; -} __attribute__ ((packed)); - -static inline int phys_hdr__size(enum diag204_format type) -{ - if (type == INFO_SIMPLE) - return sizeof(struct phys_hdr); - else /* INFO_EXT */ - return sizeof(struct x_phys_hdr); -} - -static inline __u8 phys_hdr__cpus(enum diag204_format type, void *hdr) -{ - if (type == INFO_SIMPLE) - return ((struct phys_hdr *)hdr)->cpus; - else /* INFO_EXT */ - return ((struct x_phys_hdr *)hdr)->cpus; -} - -/* Physical CPU info block */ - -struct phys_cpu { - __u16 cpu_addr; - char reserved1[2]; - __u8 ctidx; - char reserved2[3]; - __u64 mgm_time; - char reserved3[8]; -} __attribute__ ((packed)); - -struct x_phys_cpu { - __u16 cpu_addr; - char reserved1[2]; - __u8 ctidx; - char reserved2[3]; - __u64 mgm_time; - char reserved3[80]; -} __attribute__ ((packed)); - -static inline int phys_cpu__size(enum diag204_format type) -{ - if (type == INFO_SIMPLE) - return sizeof(struct phys_cpu); - else /* INFO_EXT */ - return sizeof(struct x_phys_cpu); -} - -static inline __u16 phys_cpu__cpu_addr(enum diag204_format type, void *hdr) -{ - if (type == INFO_SIMPLE) - return ((struct phys_cpu *)hdr)->cpu_addr; - else /* INFO_EXT */ - return ((struct x_phys_cpu *)hdr)->cpu_addr; -} - -static inline __u64 phys_cpu__mgm_time(enum diag204_format type, void *hdr) -{ - if (type == INFO_SIMPLE) - return ((struct phys_cpu *)hdr)->mgm_time; - else /* INFO_EXT */ - return ((struct x_phys_cpu *)hdr)->mgm_time; -} - -static inline __u64 phys_cpu__ctidx(enum diag204_format type, void *hdr) -{ - if (type == INFO_SIMPLE) - return ((struct phys_cpu *)hdr)->ctidx; - else /* INFO_EXT */ - return ((struct x_phys_cpu *)hdr)->ctidx; -} - -/* Diagnose 204 functions */ - -static int diag204(unsigned long subcode, unsigned long size, void *addr) -{ - register unsigned long _subcode asm("0") = subcode; - register unsigned long _size asm("1") = size; - - asm volatile( - " diag %2,%0,0x204\n" - "0:\n" - EX_TABLE(0b,0b) - : "+d" (_subcode), "+d" (_size) : "d" (addr) : "memory"); - if (_subcode) - return -1; - return _size; -} - -/* - * For the old diag subcode 4 with simple data format we have to use real - * memory. If we use subcode 6 or 7 with extended data format, we can (and - * should) use vmalloc, since we need a lot of memory in that case. Currently - * up to 93 pages! - */ - -static void diag204_free_buffer(void) -{ - if (!diag204_buf) - return; - if (diag204_buf_vmalloc) { - vfree(diag204_buf_vmalloc); - diag204_buf_vmalloc = NULL; - } else { - free_pages((unsigned long) diag204_buf, 0); - } - diag204_buf = NULL; -} - -static void *page_align_ptr(void *ptr) -{ - return (void *) PAGE_ALIGN((unsigned long) ptr); -} - -static void *diag204_alloc_vbuf(int pages) -{ - /* The buffer has to be page aligned! */ - diag204_buf_vmalloc = vmalloc(PAGE_SIZE * (pages + 1)); - if (!diag204_buf_vmalloc) - return ERR_PTR(-ENOMEM); - diag204_buf = page_align_ptr(diag204_buf_vmalloc); - diag204_buf_pages = pages; - return diag204_buf; -} - -static void *diag204_alloc_rbuf(void) -{ - diag204_buf = (void*)__get_free_pages(GFP_KERNEL,0); - if (!diag204_buf) - return ERR_PTR(-ENOMEM); - diag204_buf_pages = 1; - return diag204_buf; -} - -static void *diag204_get_buffer(enum diag204_format fmt, int *pages) -{ - if (diag204_buf) { - *pages = diag204_buf_pages; - return diag204_buf; - } - if (fmt == INFO_SIMPLE) { - *pages = 1; - return diag204_alloc_rbuf(); - } else {/* INFO_EXT */ - *pages = diag204((unsigned long)SUBC_RSI | - (unsigned long)INFO_EXT, 0, NULL); - if (*pages <= 0) - return ERR_PTR(-ENOSYS); - else - return diag204_alloc_vbuf(*pages); - } -} - -/* - * diag204_probe() has to find out, which type of diagnose 204 implementation - * we have on our machine. Currently there are three possible scanarios: - * - subcode 4 + simple data format (only one page) - * - subcode 4-6 + extended data format - * - subcode 4-7 + extended data format - * - * Subcode 5 is used to retrieve the size of the data, provided by subcodes - * 6 and 7. Subcode 7 basically has the same function as subcode 6. In addition - * to subcode 6 it provides also information about secondary cpus. - * In order to get as much information as possible, we first try - * subcode 7, then 6 and if both fail, we use subcode 4. - */ - -static int diag204_probe(void) -{ - void *buf; - int pages, rc; - - buf = diag204_get_buffer(INFO_EXT, &pages); - if (!IS_ERR(buf)) { - if (diag204((unsigned long)SUBC_STIB7 | - (unsigned long)INFO_EXT, pages, buf) >= 0) { - diag204_store_sc = SUBC_STIB7; - diag204_info_type = INFO_EXT; - goto out; - } - if (diag204((unsigned long)SUBC_STIB6 | - (unsigned long)INFO_EXT, pages, buf) >= 0) { - diag204_store_sc = SUBC_STIB6; - diag204_info_type = INFO_EXT; - goto out; - } - diag204_free_buffer(); - } - - /* subcodes 6 and 7 failed, now try subcode 4 */ - - buf = diag204_get_buffer(INFO_SIMPLE, &pages); - if (IS_ERR(buf)) { - rc = PTR_ERR(buf); - goto fail_alloc; - } - if (diag204((unsigned long)SUBC_STIB4 | - (unsigned long)INFO_SIMPLE, pages, buf) >= 0) { - diag204_store_sc = SUBC_STIB4; - diag204_info_type = INFO_SIMPLE; - goto out; - } else { - rc = -ENOSYS; - goto fail_store; - } -out: - rc = 0; -fail_store: - diag204_free_buffer(); -fail_alloc: - return rc; -} - -static int diag204_do_store(void *buf, int pages) -{ - int rc; - - rc = diag204((unsigned long) diag204_store_sc | - (unsigned long) diag204_info_type, pages, buf); - return rc < 0 ? -ENOSYS : 0; -} - -static void *diag204_store(void) -{ - void *buf; - int pages, rc; - - buf = diag204_get_buffer(diag204_info_type, &pages); - if (IS_ERR(buf)) - goto out; - rc = diag204_do_store(buf, pages); - if (rc) - return ERR_PTR(rc); -out: - return buf; -} - -/* Diagnose 224 functions */ - -static int diag224(void *ptr) -{ - int rc = -EOPNOTSUPP; - - asm volatile( - " diag %1,%2,0x224\n" - "0: lhi %0,0x0\n" - "1:\n" - EX_TABLE(0b,1b) - : "+d" (rc) :"d" (0), "d" (ptr) : "memory"); - return rc; -} - -static int diag224_get_name_table(void) -{ - /* memory must be below 2GB */ - diag224_cpu_names = kmalloc(PAGE_SIZE, GFP_KERNEL | GFP_DMA); - if (!diag224_cpu_names) - return -ENOMEM; - if (diag224(diag224_cpu_names)) { - kfree(diag224_cpu_names); - return -EOPNOTSUPP; - } - EBCASC(diag224_cpu_names + 16, (*diag224_cpu_names + 1) * 16); - return 0; -} - -static void diag224_delete_name_table(void) -{ - kfree(diag224_cpu_names); -} - -static int diag224_idx2name(int index, char *name) -{ - memcpy(name, diag224_cpu_names + ((index + 1) * CPU_NAME_LEN), - CPU_NAME_LEN); - name[CPU_NAME_LEN] = 0; - strim(name); - return 0; -} - -struct dbfs_d204_hdr { - u64 len; /* Length of d204 buffer without header */ - u16 version; /* Version of header */ - u8 sc; /* Used subcode */ - char reserved[53]; -} __attribute__ ((packed)); - -struct dbfs_d204 { - struct dbfs_d204_hdr hdr; /* 64 byte header */ - char buf[]; /* d204 buffer */ -} __attribute__ ((packed)); - -static int dbfs_d204_create(void **data, void **data_free_ptr, size_t *size) -{ - struct dbfs_d204 *d204; - int rc, buf_size; - void *base; - - buf_size = PAGE_SIZE * (diag204_buf_pages + 1) + sizeof(d204->hdr); - 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; - } - d204->hdr.version = DBFS_D204_HDR_VERSION; - d204->hdr.len = PAGE_SIZE * diag204_buf_pages; - d204->hdr.sc = diag204_store_sc; - *data = d204; - *data_free_ptr = base; - *size = d204->hdr.len + sizeof(struct dbfs_d204_hdr); - return 0; -} - -static struct hypfs_dbfs_file dbfs_file_d204 = { - .name = "diag_204", - .data_create = dbfs_d204_create, - .data_free = vfree, -}; - -__init int hypfs_diag_init(void) -{ - int rc; - - if (diag204_probe()) { - pr_err("The hardware system does not support hypfs\n"); - return -ENODATA; - } - if (diag204_info_type == INFO_EXT) { - rc = hypfs_dbfs_create_file(&dbfs_file_d204); - if (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) -{ - debugfs_remove(dbfs_d204_file); - diag224_delete_name_table(); - diag204_free_buffer(); - hypfs_dbfs_remove_file(&dbfs_file_d204); -} - -/* - * Functions to create the directory structure - * ******************************************* - */ - -static int hypfs_create_cpu_files(struct super_block *sb, - struct dentry *cpus_dir, void *cpu_info) -{ - struct dentry *cpu_dir; - char buffer[TMP_SIZE]; - void *rc; - - 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_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", - 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", - 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; -} - -static void *hypfs_create_lpar_files(struct super_block *sb, - struct dentry *systems_dir, void *part_hdr) -{ - struct dentry *cpus_dir; - struct dentry *lpar_dir; - char lpar_name[LPAR_NAME_LEN + 1]; - void *cpu_info; - int i; - - 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); - if (IS_ERR(lpar_dir)) - return lpar_dir; - cpus_dir = hypfs_mkdir(sb, 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); - if (rc) - return ERR_PTR(rc); - cpu_info += cpu_info__size(diag204_info_type); - } - return cpu_info; -} - -static int hypfs_create_phys_cpu_files(struct super_block *sb, - struct dentry *cpus_dir, void *cpu_info) -{ - struct dentry *cpu_dir; - char buffer[TMP_SIZE]; - void *rc; - - snprintf(buffer, TMP_SIZE, "%i", phys_cpu__cpu_addr(diag204_info_type, - cpu_info)); - cpu_dir = hypfs_mkdir(sb, cpus_dir, buffer); - if (IS_ERR(cpu_dir)) - return PTR_ERR(cpu_dir); - rc = hypfs_create_u64(sb, 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; -} - -static void *hypfs_create_phys_files(struct super_block *sb, - struct dentry *parent_dir, void *phys_hdr) -{ - int i; - void *cpu_info; - struct dentry *cpus_dir; - - cpus_dir = hypfs_mkdir(sb, 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); - if (rc) - return ERR_PTR(rc); - cpu_info += phys_cpu__size(diag204_info_type); - } - return cpu_info; -} - -int hypfs_diag_create_files(struct super_block *sb, struct dentry *root) -{ - struct dentry *systems_dir, *hyp_dir; - void *time_hdr, *part_hdr; - int i, rc; - void *buffer, *ptr; - - buffer = diag204_store(); - if (IS_ERR(buffer)) - return PTR_ERR(buffer); - - systems_dir = hypfs_mkdir(sb, root, "systems"); - if (IS_ERR(systems_dir)) { - rc = PTR_ERR(systems_dir); - goto err_out; - } - 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); - 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); - if (IS_ERR(ptr)) { - rc = PTR_ERR(ptr); - goto err_out; - } - } - hyp_dir = hypfs_mkdir(sb, 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"); - if (IS_ERR(ptr)) { - rc = PTR_ERR(ptr); - goto err_out; - } - rc = 0; - -err_out: - return rc; -} diff --git a/ANDROID_3.4.5/arch/s390/hypfs/hypfs_vm.c b/ANDROID_3.4.5/arch/s390/hypfs/hypfs_vm.c deleted file mode 100644 index e5479600..00000000 --- a/ANDROID_3.4.5/arch/s390/hypfs/hypfs_vm.c +++ /dev/null @@ -1,283 +0,0 @@ -/* - * Hypervisor filesystem for Linux on s390. z/VM implementation. - * - * Copyright (C) IBM Corp. 2006 - * Author(s): Michael Holzheu <holzheu@de.ibm.com> - */ - -#include <linux/types.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/vmalloc.h> -#include <asm/ebcdic.h> -#include <asm/timex.h> -#include "hypfs.h" - -#define NAME_LEN 8 -#define DBFS_D2FC_HDR_VERSION 0 - -static char local_guest[] = " "; -static char all_guests[] = "* "; -static char *guest_query; - -struct diag2fc_data { - __u32 version; - __u32 flags; - __u64 used_cpu; - __u64 el_time; - __u64 mem_min_kb; - __u64 mem_max_kb; - __u64 mem_share_kb; - __u64 mem_used_kb; - __u32 pcpus; - __u32 lcpus; - __u32 vcpus; - __u32 cpu_min; - __u32 cpu_max; - __u32 cpu_shares; - __u32 cpu_use_samp; - __u32 cpu_delay_samp; - __u32 page_wait_samp; - __u32 idle_samp; - __u32 other_samp; - __u32 total_samp; - char guest_name[NAME_LEN]; -}; - -struct diag2fc_parm_list { - char userid[NAME_LEN]; - char aci_grp[NAME_LEN]; - __u64 addr; - __u32 size; - __u32 fmt; -}; - -static int diag2fc(int size, char* query, void *addr) -{ - unsigned long residual_cnt; - unsigned long rc; - struct diag2fc_parm_list parm_list; - - memcpy(parm_list.userid, query, NAME_LEN); - ASCEBC(parm_list.userid, NAME_LEN); - parm_list.addr = (unsigned long) addr ; - parm_list.size = size; - parm_list.fmt = 0x02; - memset(parm_list.aci_grp, 0x40, NAME_LEN); - rc = -1; - - asm volatile( - " diag %0,%1,0x2fc\n" - "0:\n" - EX_TABLE(0b,0b) - : "=d" (residual_cnt), "+d" (rc) : "0" (&parm_list) : "memory"); - - if ((rc != 0 ) && (rc != -2)) - return rc; - else - return -residual_cnt; -} - -/* - * Allocate buffer for "query" and store diag 2fc at "offset" - */ -static void *diag2fc_store(char *query, unsigned int *count, int offset) -{ - void *data; - int size; - - do { - size = diag2fc(0, query, NULL); - if (size < 0) - return ERR_PTR(-EACCES); - data = vmalloc(size + offset); - if (!data) - return ERR_PTR(-ENOMEM); - if (diag2fc(size, query, data + offset) == 0) - break; - vfree(data); - } while (1); - *count = (size / sizeof(struct diag2fc_data)); - - return data; -} - -static void diag2fc_free(const void *data) -{ - vfree(data); -} - -#define ATTRIBUTE(sb, dir, name, member) \ -do { \ - void *rc; \ - rc = hypfs_create_u64(sb, dir, name, member); \ - if (IS_ERR(rc)) \ - return PTR_ERR(rc); \ -} while(0) - -static int hpyfs_vm_create_guest(struct super_block *sb, - struct dentry *systems_dir, - struct diag2fc_data *data) -{ - char guest_name[NAME_LEN + 1] = {}; - struct dentry *guest_dir, *cpus_dir, *samples_dir, *mem_dir; - int dedicated_flag, capped_value; - - capped_value = (data->flags & 0x00000006) >> 1; - dedicated_flag = (data->flags & 0x00000008) >> 3; - - /* guest dir */ - memcpy(guest_name, data->guest_name, NAME_LEN); - EBCASC(guest_name, NAME_LEN); - strim(guest_name); - guest_dir = hypfs_mkdir(sb, systems_dir, guest_name); - if (IS_ERR(guest_dir)) - return PTR_ERR(guest_dir); - ATTRIBUTE(sb, guest_dir, "onlinetime_us", data->el_time); - - /* logical cpu information */ - cpus_dir = hypfs_mkdir(sb, guest_dir, "cpus"); - if (IS_ERR(cpus_dir)) - return PTR_ERR(cpus_dir); - ATTRIBUTE(sb, cpus_dir, "cputime_us", data->used_cpu); - ATTRIBUTE(sb, cpus_dir, "capped", capped_value); - ATTRIBUTE(sb, cpus_dir, "dedicated", dedicated_flag); - ATTRIBUTE(sb, cpus_dir, "count", data->vcpus); - ATTRIBUTE(sb, cpus_dir, "weight_min", data->cpu_min); - ATTRIBUTE(sb, cpus_dir, "weight_max", data->cpu_max); - ATTRIBUTE(sb, cpus_dir, "weight_cur", data->cpu_shares); - - /* memory information */ - mem_dir = hypfs_mkdir(sb, guest_dir, "mem"); - if (IS_ERR(mem_dir)) - return PTR_ERR(mem_dir); - ATTRIBUTE(sb, mem_dir, "min_KiB", data->mem_min_kb); - ATTRIBUTE(sb, mem_dir, "max_KiB", data->mem_max_kb); - ATTRIBUTE(sb, mem_dir, "used_KiB", data->mem_used_kb); - ATTRIBUTE(sb, mem_dir, "share_KiB", data->mem_share_kb); - - /* samples */ - samples_dir = hypfs_mkdir(sb, guest_dir, "samples"); - if (IS_ERR(samples_dir)) - return PTR_ERR(samples_dir); - ATTRIBUTE(sb, samples_dir, "cpu_using", data->cpu_use_samp); - ATTRIBUTE(sb, samples_dir, "cpu_delay", data->cpu_delay_samp); - ATTRIBUTE(sb, samples_dir, "mem_delay", data->page_wait_samp); - ATTRIBUTE(sb, samples_dir, "idle", data->idle_samp); - ATTRIBUTE(sb, samples_dir, "other", data->other_samp); - ATTRIBUTE(sb, samples_dir, "total", data->total_samp); - return 0; -} - -int hypfs_vm_create_files(struct super_block *sb, struct dentry *root) -{ - struct dentry *dir, *file; - struct diag2fc_data *data; - unsigned int count = 0; - int rc, i; - - data = diag2fc_store(guest_query, &count, 0); - if (IS_ERR(data)) - return PTR_ERR(data); - - /* Hpervisor Info */ - dir = hypfs_mkdir(sb, root, "hyp"); - if (IS_ERR(dir)) { - rc = PTR_ERR(dir); - goto failed; - } - file = hypfs_create_str(sb, dir, "type", "z/VM Hypervisor"); - if (IS_ERR(file)) { - rc = PTR_ERR(file); - goto failed; - } - - /* physical cpus */ - dir = hypfs_mkdir(sb, root, "cpus"); - if (IS_ERR(dir)) { - rc = PTR_ERR(dir); - goto failed; - } - file = hypfs_create_u64(sb, dir, "count", data->lcpus); - if (IS_ERR(file)) { - rc = PTR_ERR(file); - goto failed; - } - - /* guests */ - dir = hypfs_mkdir(sb, root, "systems"); - if (IS_ERR(dir)) { - rc = PTR_ERR(dir); - goto failed; - } - - for (i = 0; i < count; i++) { - rc = hpyfs_vm_create_guest(sb, dir, &(data[i])); - if (rc) - goto failed; - } - diag2fc_free(data); - return 0; - -failed: - diag2fc_free(data); - return rc; -} - -struct dbfs_d2fc_hdr { - u64 len; /* Length of d2fc buffer without header */ - u16 version; /* Version of header */ - char tod_ext[16]; /* TOD clock for d2fc */ - u64 count; /* Number of VM guests in d2fc buffer */ - char reserved[30]; -} __attribute__ ((packed)); - -struct dbfs_d2fc { - struct dbfs_d2fc_hdr hdr; /* 64 byte header */ - char buf[]; /* d2fc buffer */ -} __attribute__ ((packed)); - -static int dbfs_diag2fc_create(void **data, void **data_free_ptr, size_t *size) -{ - struct dbfs_d2fc *d2fc; - unsigned int count; - - d2fc = diag2fc_store(guest_query, &count, sizeof(d2fc->hdr)); - if (IS_ERR(d2fc)) - return PTR_ERR(d2fc); - get_clock_ext(d2fc->hdr.tod_ext); - d2fc->hdr.len = count * sizeof(struct diag2fc_data); - d2fc->hdr.version = DBFS_D2FC_HDR_VERSION; - d2fc->hdr.count = count; - memset(&d2fc->hdr.reserved, 0, sizeof(d2fc->hdr.reserved)); - *data = d2fc; - *data_free_ptr = d2fc; - *size = d2fc->hdr.len + sizeof(struct dbfs_d2fc_hdr); - return 0; -} - -static struct hypfs_dbfs_file dbfs_file_2fc = { - .name = "diag_2fc", - .data_create = dbfs_diag2fc_create, - .data_free = diag2fc_free, -}; - -int hypfs_vm_init(void) -{ - if (!MACHINE_IS_VM) - return 0; - if (diag2fc(0, all_guests, NULL) > 0) - guest_query = all_guests; - else if (diag2fc(0, local_guest, NULL) > 0) - guest_query = local_guest; - else - return -EACCES; - return hypfs_dbfs_create_file(&dbfs_file_2fc); -} - -void hypfs_vm_exit(void) -{ - if (!MACHINE_IS_VM) - return; - hypfs_dbfs_remove_file(&dbfs_file_2fc); -} diff --git a/ANDROID_3.4.5/arch/s390/hypfs/inode.c b/ANDROID_3.4.5/arch/s390/hypfs/inode.c deleted file mode 100644 index 6a2cb560..00000000 --- a/ANDROID_3.4.5/arch/s390/hypfs/inode.c +++ /dev/null @@ -1,515 +0,0 @@ -/* - * arch/s390/hypfs/inode.c - * Hypervisor filesystem for Linux on s390. - * - * Copyright IBM Corp. 2006, 2008 - * Author(s): Michael Holzheu <holzheu@de.ibm.com> - */ - -#define KMSG_COMPONENT "hypfs" -#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt - -#include <linux/types.h> -#include <linux/errno.h> -#include <linux/fs.h> -#include <linux/namei.h> -#include <linux/vfs.h> -#include <linux/slab.h> -#include <linux/pagemap.h> -#include <linux/time.h> -#include <linux/parser.h> -#include <linux/sysfs.h> -#include <linux/module.h> -#include <linux/seq_file.h> -#include <linux/mount.h> -#include <asm/ebcdic.h> -#include "hypfs.h" - -#define HYPFS_MAGIC 0x687970 /* ASCII 'hyp' */ -#define TMP_SIZE 64 /* size of temporary buffers */ - -static struct dentry *hypfs_create_update_file(struct super_block *sb, - struct dentry *dir); - -struct hypfs_sb_info { - uid_t uid; /* uid used for files and dirs */ - gid_t gid; /* gid used for files and dirs */ - struct dentry *update_file; /* file to trigger update */ - time_t last_update; /* last update time in secs since 1970 */ - struct mutex lock; /* lock to protect update process */ -}; - -static const struct file_operations hypfs_file_ops; -static struct file_system_type hypfs_type; -static const struct super_operations hypfs_s_ops; - -/* start of list of all dentries, which have to be deleted on update */ -static struct dentry *hypfs_last_dentry; - -static void hypfs_update_update(struct super_block *sb) -{ - struct hypfs_sb_info *sb_info = sb->s_fs_info; - struct inode *inode = sb_info->update_file->d_inode; - - sb_info->last_update = get_seconds(); - inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; -} - -/* directory tree removal functions */ - -static void hypfs_add_dentry(struct dentry *dentry) -{ - dentry->d_fsdata = hypfs_last_dentry; - hypfs_last_dentry = dentry; -} - -static inline int hypfs_positive(struct dentry *dentry) -{ - return dentry->d_inode && !d_unhashed(dentry); -} - -static void hypfs_remove(struct dentry *dentry) -{ - struct dentry *parent; - - parent = dentry->d_parent; - if (!parent || !parent->d_inode) - return; - mutex_lock(&parent->d_inode->i_mutex); - if (hypfs_positive(dentry)) { - if (S_ISDIR(dentry->d_inode->i_mode)) - simple_rmdir(parent->d_inode, dentry); - else - simple_unlink(parent->d_inode, dentry); - } - d_delete(dentry); - dput(dentry); - mutex_unlock(&parent->d_inode->i_mutex); -} - -static void hypfs_delete_tree(struct dentry *root) -{ - while (hypfs_last_dentry) { - struct dentry *next_dentry; - next_dentry = hypfs_last_dentry->d_fsdata; - hypfs_remove(hypfs_last_dentry); - hypfs_last_dentry = next_dentry; - } -} - -static struct inode *hypfs_make_inode(struct super_block *sb, umode_t mode) -{ - struct inode *ret = new_inode(sb); - - if (ret) { - struct hypfs_sb_info *hypfs_info = sb->s_fs_info; - ret->i_mode = mode; - ret->i_uid = hypfs_info->uid; - ret->i_gid = hypfs_info->gid; - ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; - if (S_ISDIR(mode)) - set_nlink(ret, 2); - } - return ret; -} - -static void hypfs_evict_inode(struct inode *inode) -{ - end_writeback(inode); - kfree(inode->i_private); -} - -static int hypfs_open(struct inode *inode, struct file *filp) -{ - char *data = filp->f_path.dentry->d_inode->i_private; - struct hypfs_sb_info *fs_info; - - if (filp->f_mode & FMODE_WRITE) { - if (!(inode->i_mode & S_IWUGO)) - return -EACCES; - } - if (filp->f_mode & FMODE_READ) { - if (!(inode->i_mode & S_IRUGO)) - return -EACCES; - } - - fs_info = inode->i_sb->s_fs_info; - if(data) { - mutex_lock(&fs_info->lock); - filp->private_data = kstrdup(data, GFP_KERNEL); - if (!filp->private_data) { - mutex_unlock(&fs_info->lock); - return -ENOMEM; - } - mutex_unlock(&fs_info->lock); - } - return nonseekable_open(inode, filp); -} - -static ssize_t hypfs_aio_read(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t offset) -{ - char *data; - ssize_t ret; - struct file *filp = iocb->ki_filp; - /* XXX: temporary */ - char __user *buf = iov[0].iov_base; - size_t count = iov[0].iov_len; - - if (nr_segs != 1) - return -EINVAL; - - data = filp->private_data; - ret = simple_read_from_buffer(buf, count, &offset, data, strlen(data)); - if (ret <= 0) - return ret; - - iocb->ki_pos += ret; - file_accessed(filp); - - return ret; -} -static ssize_t hypfs_aio_write(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t offset) -{ - int rc; - struct super_block *sb; - struct hypfs_sb_info *fs_info; - size_t count = iov_length(iov, nr_segs); - - sb = iocb->ki_filp->f_path.dentry->d_inode->i_sb; - fs_info = sb->s_fs_info; - /* - * Currently we only allow one update per second for two reasons: - * 1. diag 204 is VERY expensive - * 2. If several processes do updates in parallel and then read the - * hypfs data, the likelihood of collisions is reduced, if we restrict - * the minimum update interval. A collision occurs, if during the - * data gathering of one process another process triggers an update - * If the first process wants to ensure consistent data, it has - * to restart data collection in this case. - */ - mutex_lock(&fs_info->lock); - if (fs_info->last_update == get_seconds()) { - rc = -EBUSY; - goto out; - } - hypfs_delete_tree(sb->s_root); - if (MACHINE_IS_VM) - rc = hypfs_vm_create_files(sb, sb->s_root); - else - rc = hypfs_diag_create_files(sb, sb->s_root); - if (rc) { - pr_err("Updating the hypfs tree failed\n"); - hypfs_delete_tree(sb->s_root); - goto out; - } - hypfs_update_update(sb); - rc = count; -out: - mutex_unlock(&fs_info->lock); - return rc; -} - -static int hypfs_release(struct inode *inode, struct file *filp) -{ - kfree(filp->private_data); - return 0; -} - -enum { opt_uid, opt_gid, opt_err }; - -static const match_table_t hypfs_tokens = { - {opt_uid, "uid=%u"}, - {opt_gid, "gid=%u"}, - {opt_err, NULL} -}; - -static int hypfs_parse_options(char *options, struct super_block *sb) -{ - char *str; - substring_t args[MAX_OPT_ARGS]; - - if (!options) - return 0; - while ((str = strsep(&options, ",")) != NULL) { - int token, option; - struct hypfs_sb_info *hypfs_info = sb->s_fs_info; - - if (!*str) - continue; - token = match_token(str, hypfs_tokens, args); - switch (token) { - case opt_uid: - if (match_int(&args[0], &option)) - return -EINVAL; - hypfs_info->uid = option; - break; - case opt_gid: - if (match_int(&args[0], &option)) - return -EINVAL; - hypfs_info->gid = option; - break; - case opt_err: - default: - pr_err("%s is not a valid mount option\n", str); - return -EINVAL; - } - } - return 0; -} - -static int hypfs_show_options(struct seq_file *s, struct dentry *root) -{ - struct hypfs_sb_info *hypfs_info = root->d_sb->s_fs_info; - - seq_printf(s, ",uid=%u", hypfs_info->uid); - seq_printf(s, ",gid=%u", hypfs_info->gid); - return 0; -} - -static int hypfs_fill_super(struct super_block *sb, void *data, int silent) -{ - struct inode *root_inode; - struct dentry *root_dentry; - int rc = 0; - struct hypfs_sb_info *sbi; - - sbi = kzalloc(sizeof(struct hypfs_sb_info), GFP_KERNEL); - if (!sbi) - return -ENOMEM; - mutex_init(&sbi->lock); - sbi->uid = current_uid(); - sbi->gid = current_gid(); - sb->s_fs_info = sbi; - sb->s_blocksize = PAGE_CACHE_SIZE; - sb->s_blocksize_bits = PAGE_CACHE_SHIFT; - sb->s_magic = HYPFS_MAGIC; - sb->s_op = &hypfs_s_ops; - if (hypfs_parse_options(data, sb)) - return -EINVAL; - root_inode = hypfs_make_inode(sb, S_IFDIR | 0755); - if (!root_inode) - return -ENOMEM; - root_inode->i_op = &simple_dir_inode_operations; - root_inode->i_fop = &simple_dir_operations; - sb->s_root = root_dentry = d_make_root(root_inode); - if (!root_dentry) - return -ENOMEM; - if (MACHINE_IS_VM) - rc = hypfs_vm_create_files(sb, root_dentry); - else - rc = hypfs_diag_create_files(sb, root_dentry); - if (rc) - return rc; - sbi->update_file = hypfs_create_update_file(sb, root_dentry); - if (IS_ERR(sbi->update_file)) - return PTR_ERR(sbi->update_file); - hypfs_update_update(sb); - pr_info("Hypervisor filesystem mounted\n"); - return 0; -} - -static struct dentry *hypfs_mount(struct file_system_type *fst, int flags, - const char *devname, void *data) -{ - return mount_single(fst, flags, data, hypfs_fill_super); -} - -static void hypfs_kill_super(struct super_block *sb) -{ - struct hypfs_sb_info *sb_info = sb->s_fs_info; - - if (sb->s_root) - hypfs_delete_tree(sb->s_root); - if (sb_info->update_file) - hypfs_remove(sb_info->update_file); - kfree(sb->s_fs_info); - sb->s_fs_info = NULL; - kill_litter_super(sb); -} - -static struct dentry *hypfs_create_file(struct super_block *sb, - struct dentry *parent, const char *name, - char *data, umode_t mode) -{ - struct dentry *dentry; - struct inode *inode; - - mutex_lock(&parent->d_inode->i_mutex); - dentry = lookup_one_len(name, parent, strlen(name)); - if (IS_ERR(dentry)) { - dentry = ERR_PTR(-ENOMEM); - goto fail; - } - inode = hypfs_make_inode(sb, mode); - if (!inode) { - dput(dentry); - dentry = ERR_PTR(-ENOMEM); - goto fail; - } - if (S_ISREG(mode)) { - inode->i_fop = &hypfs_file_ops; - if (data) - inode->i_size = strlen(data); - else - inode->i_size = 0; - } else if (S_ISDIR(mode)) { - inode->i_op = &simple_dir_inode_operations; - inode->i_fop = &simple_dir_operations; - inc_nlink(parent->d_inode); - } else - BUG(); - inode->i_private = data; - d_instantiate(dentry, inode); - dget(dentry); -fail: - mutex_unlock(&parent->d_inode->i_mutex); - return dentry; -} - -struct dentry *hypfs_mkdir(struct super_block *sb, struct dentry *parent, - const char *name) -{ - struct dentry *dentry; - - dentry = hypfs_create_file(sb, parent, name, NULL, S_IFDIR | DIR_MODE); - if (IS_ERR(dentry)) - return dentry; - hypfs_add_dentry(dentry); - return dentry; -} - -static struct dentry *hypfs_create_update_file(struct super_block *sb, - struct dentry *dir) -{ - struct dentry *dentry; - - dentry = hypfs_create_file(sb, dir, "update", NULL, - S_IFREG | UPDATE_FILE_MODE); - /* - * We do not put the update file on the 'delete' list with - * hypfs_add_dentry(), since it should not be removed when the tree - * is updated. - */ - return dentry; -} - -struct dentry *hypfs_create_u64(struct super_block *sb, struct dentry *dir, - const char *name, __u64 value) -{ - char *buffer; - char tmp[TMP_SIZE]; - struct dentry *dentry; - - snprintf(tmp, TMP_SIZE, "%llu\n", (unsigned long long int)value); - buffer = kstrdup(tmp, GFP_KERNEL); - if (!buffer) - return ERR_PTR(-ENOMEM); - dentry = - hypfs_create_file(sb, dir, name, buffer, S_IFREG | REG_FILE_MODE); - if (IS_ERR(dentry)) { - kfree(buffer); - return ERR_PTR(-ENOMEM); - } - hypfs_add_dentry(dentry); - return dentry; -} - -struct dentry *hypfs_create_str(struct super_block *sb, struct dentry *dir, - const char *name, char *string) -{ - char *buffer; - struct dentry *dentry; - - buffer = kmalloc(strlen(string) + 2, GFP_KERNEL); - if (!buffer) - return ERR_PTR(-ENOMEM); - sprintf(buffer, "%s\n", string); - dentry = - hypfs_create_file(sb, dir, name, buffer, S_IFREG | REG_FILE_MODE); - if (IS_ERR(dentry)) { - kfree(buffer); - return ERR_PTR(-ENOMEM); - } - hypfs_add_dentry(dentry); - return dentry; -} - -static const struct file_operations hypfs_file_ops = { - .open = hypfs_open, - .release = hypfs_release, - .read = do_sync_read, - .write = do_sync_write, - .aio_read = hypfs_aio_read, - .aio_write = hypfs_aio_write, - .llseek = no_llseek, -}; - -static struct file_system_type hypfs_type = { - .owner = THIS_MODULE, - .name = "s390_hypfs", - .mount = hypfs_mount, - .kill_sb = hypfs_kill_super -}; - -static const struct super_operations hypfs_s_ops = { - .statfs = simple_statfs, - .evict_inode = hypfs_evict_inode, - .show_options = hypfs_show_options, -}; - -static struct kobject *s390_kobj; - -static int __init hypfs_init(void) -{ - int rc; - - rc = hypfs_dbfs_init(); - if (rc) - return rc; - if (hypfs_diag_init()) { - rc = -ENODATA; - goto fail_dbfs_exit; - } - if (hypfs_vm_init()) { - rc = -ENODATA; - goto fail_hypfs_diag_exit; - } - s390_kobj = kobject_create_and_add("s390", hypervisor_kobj); - if (!s390_kobj) { - rc = -ENOMEM; - goto fail_hypfs_vm_exit; - } - rc = register_filesystem(&hypfs_type); - if (rc) - goto fail_filesystem; - return 0; - -fail_filesystem: - kobject_put(s390_kobj); -fail_hypfs_vm_exit: - hypfs_vm_exit(); -fail_hypfs_diag_exit: - hypfs_diag_exit(); -fail_dbfs_exit: - hypfs_dbfs_exit(); - pr_err("Initialization of hypfs failed with rc=%i\n", rc); - return rc; -} - -static void __exit hypfs_exit(void) -{ - hypfs_diag_exit(); - hypfs_vm_exit(); - hypfs_dbfs_exit(); - unregister_filesystem(&hypfs_type); - kobject_put(s390_kobj); -} - -module_init(hypfs_init) -module_exit(hypfs_exit) - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Michael Holzheu <holzheu@de.ibm.com>"); -MODULE_DESCRIPTION("s390 Hypervisor Filesystem"); |