Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Super block/filesystem wide operations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 1996 Peter J. Braam <braam@maths.ox.ac.uk> and 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Michael Callahan <callahan@maths.ox.ac.uk> 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Rewritten for Linux 2.1.  Peter Braam <braam@cs.cmu.edu>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * Copyright (C) Carnegie Mellon University
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/vfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/pid_namespace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include <linux/coda.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #include "coda_psdev.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #include "coda_linux.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #include "coda_cache.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #include "coda_int.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) /* VFS super_block ops */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) static void coda_evict_inode(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) static void coda_put_super(struct super_block *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) static int coda_statfs(struct dentry *dentry, struct kstatfs *buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) static struct kmem_cache * coda_inode_cachep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) static struct inode *coda_alloc_inode(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	struct coda_inode_info *ei;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	ei = kmem_cache_alloc(coda_inode_cachep, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	if (!ei)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	memset(&ei->c_fid, 0, sizeof(struct CodaFid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	ei->c_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	ei->c_uid = GLOBAL_ROOT_UID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	ei->c_cached_perm = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	spin_lock_init(&ei->c_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	return &ei->vfs_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) static void coda_free_inode(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	kmem_cache_free(coda_inode_cachep, ITOC(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) static void init_once(void *foo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	struct coda_inode_info *ei = (struct coda_inode_info *) foo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	inode_init_once(&ei->vfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) int __init coda_init_inodecache(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	coda_inode_cachep = kmem_cache_create("coda_inode_cache",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 				sizeof(struct coda_inode_info), 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 				SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 				SLAB_ACCOUNT, init_once);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	if (coda_inode_cachep == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) void coda_destroy_inodecache(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	 * Make sure all delayed rcu free inodes are flushed before we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	 * destroy cache.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	rcu_barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	kmem_cache_destroy(coda_inode_cachep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) static int coda_remount(struct super_block *sb, int *flags, char *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	sync_filesystem(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	*flags |= SB_NOATIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) /* exported operations */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) static const struct super_operations coda_super_operations =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	.alloc_inode	= coda_alloc_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	.free_inode	= coda_free_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	.evict_inode	= coda_evict_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	.put_super	= coda_put_super,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	.statfs		= coda_statfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	.remount_fs	= coda_remount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static int get_device_index(struct coda_mount_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	struct fd f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	int idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	if (data == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		pr_warn("%s: Bad mount data\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	if (data->version != CODA_MOUNT_VERSION) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		pr_warn("%s: Bad mount version\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	f = fdget(data->fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	if (!f.file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		goto Ebadf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	inode = file_inode(f.file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	if (!S_ISCHR(inode->i_mode) || imajor(inode) != CODA_PSDEV_MAJOR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		fdput(f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		goto Ebadf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	idx = iminor(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	fdput(f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	if (idx < 0 || idx >= MAX_CODADEVS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		pr_warn("%s: Bad minor number\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	return idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) Ebadf:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	pr_warn("%s: Bad file\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static int coda_fill_super(struct super_block *sb, void *data, int silent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	struct inode *root = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	struct venus_comm *vc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	struct CodaFid fid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	int idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	if (task_active_pid_ns(current) != &init_pid_ns)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	idx = get_device_index((struct coda_mount_data *) data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	/* Ignore errors in data, for backward compatibility */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	if(idx == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	pr_info("%s: device index: %i\n", __func__,  idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	vc = &coda_comms[idx];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	mutex_lock(&vc->vc_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	if (!vc->vc_inuse) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		pr_warn("%s: No pseudo device\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		error = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		goto unlock_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	if (vc->vc_sb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		pr_warn("%s: Device already mounted\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		error = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		goto unlock_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	vc->vc_sb = sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	mutex_unlock(&vc->vc_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	sb->s_fs_info = vc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	sb->s_flags |= SB_NOATIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	sb->s_blocksize = 4096;	/* XXXXX  what do we put here?? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	sb->s_blocksize_bits = 12;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	sb->s_magic = CODA_SUPER_MAGIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	sb->s_op = &coda_super_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	sb->s_d_op = &coda_dentry_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	sb->s_time_gran = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	sb->s_time_min = S64_MIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	sb->s_time_max = S64_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	error = super_setup_bdi(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	/* get root fid from Venus: this needs the root inode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	error = venus_rootfid(sb, &fid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	if ( error ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		pr_warn("%s: coda_get_rootfid failed with %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 			__func__, error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	pr_info("%s: rootfid is %s\n", __func__, coda_f2s(&fid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	/* make root inode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)         root = coda_cnode_make(&fid, sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)         if (IS_ERR(root)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		error = PTR_ERR(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		pr_warn("Failure of coda_cnode_make for root: error %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 			error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	} 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	pr_info("%s: rootinode is %ld dev %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		__func__, root->i_ino, root->i_sb->s_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	sb->s_root = d_make_root(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	if (!sb->s_root) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		error = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	mutex_lock(&vc->vc_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	vc->vc_sb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	sb->s_fs_info = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) unlock_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	mutex_unlock(&vc->vc_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) static void coda_put_super(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	struct venus_comm *vcp = coda_vcp(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	mutex_lock(&vcp->vc_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	vcp->vc_sb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	sb->s_fs_info = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	mutex_unlock(&vcp->vc_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	mutex_destroy(&vcp->vc_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	pr_info("Bye bye.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) static void coda_evict_inode(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	truncate_inode_pages_final(&inode->i_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	clear_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	coda_cache_clear_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) int coda_getattr(const struct path *path, struct kstat *stat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 		 u32 request_mask, unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	int err = coda_revalidate_inode(d_inode(path->dentry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		generic_fillattr(d_inode(path->dentry), stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) int coda_setattr(struct dentry *de, struct iattr *iattr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	struct inode *inode = d_inode(de);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	struct coda_vattr vattr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	memset(&vattr, 0, sizeof(vattr)); 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	inode->i_ctime = current_time(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	coda_iattr_to_vattr(iattr, &vattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	vattr.va_type = C_VNON; /* cannot set type */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	/* Venus is responsible for truncating the container-file!!! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	error = venus_setattr(inode->i_sb, coda_i2f(inode), &vattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	if (!error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	        coda_vattr_to_iattr(inode, &vattr); 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		coda_cache_clear_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) const struct inode_operations coda_file_inode_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	.permission	= coda_permission,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	.getattr	= coda_getattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	.setattr	= coda_setattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) static int coda_statfs(struct dentry *dentry, struct kstatfs *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	error = venus_statfs(dentry, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 		/* fake something like AFS does */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		buf->f_blocks = 9000000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		buf->f_bfree  = 9000000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		buf->f_bavail = 9000000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		buf->f_files  = 9000000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 		buf->f_ffree  = 9000000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	/* and fill in the rest */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	buf->f_type = CODA_SUPER_MAGIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	buf->f_bsize = 4096;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	buf->f_namelen = CODA_MAXNAMLEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	return 0; 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) /* init_coda: used by filesystems.c to register coda */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) static struct dentry *coda_mount(struct file_system_type *fs_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	int flags, const char *dev_name, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	return mount_nodev(fs_type, flags, data, coda_fill_super);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) struct file_system_type coda_fs_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	.owner		= THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	.name		= "coda",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	.mount		= coda_mount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	.kill_sb	= kill_anon_super,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	.fs_flags	= FS_BINARY_MOUNTDATA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) MODULE_ALIAS_FS("coda");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)