11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Super block/filesystem wide operations 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 1996 Peter J. Braam <braam@maths.ox.ac.uk> and 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Michael Callahan <callahan@maths.ox.ac.uk> 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Rewritten for Linux 2.1. Peter Braam <braam@cs.cmu.edu> 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) Carnegie Mellon University 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mm.h> 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/string.h> 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/stat.h> 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/errno.h> 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/unistd.h> 18da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe#include <linux/mutex.h> 19b5ce1d83a62fc109d8e815b1fc71dcdb0d26bc49Yoshihisa Abe#include <linux/spinlock.h> 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/file.h> 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/vfs.h> 225a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 239fd973e085f7759f710603422b2e11ad5f2e000dEric W. Biederman#include <linux/pid_namespace.h> 24834b46c37a2900bc90b5f1c5a11815be5a025445Fabian Frederick#include <linux/uaccess.h> 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/fs.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/vmalloc.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/coda.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/coda_psdev.h> 3031a203df9c109480fc6d48ba0a68763e89199acbAl Viro#include "coda_linux.h" 3131a203df9c109480fc6d48ba0a68763e89199acbAl Viro#include "coda_cache.h" 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33c98d8cfbc600af88e9e6cffc84dd342280445760Adrian Bunk#include "coda_int.h" 34c98d8cfbc600af88e9e6cffc84dd342280445760Adrian Bunk 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* VFS super_block ops */ 36b57922d97fd6f79b6dbe6db0c4fd30d219fa08c1Al Virostatic void coda_evict_inode(struct inode *); 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void coda_put_super(struct super_block *); 38726c334223180e3c0197cc980a432681370d4bafDavid Howellsstatic int coda_statfs(struct dentry *dentry, struct kstatfs *buf); 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40e18b890bb0881bbab6f4f1a6cd20d9c60d66b003Christoph Lameterstatic struct kmem_cache * coda_inode_cachep; 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct inode *coda_alloc_inode(struct super_block *sb) 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct coda_inode_info *ei; 45747fecab32e47180e2668c2b22b25752d371e636Jesper Juhl ei = kmem_cache_alloc(coda_inode_cachep, GFP_KERNEL); 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ei) 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(&ei->c_fid, 0, sizeof(struct CodaFid)); 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ei->c_flags = 0; 5017499e332962e495b3ee2e5507e09b853ed6f607Eric W. Biederman ei->c_uid = GLOBAL_ROOT_UID; 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ei->c_cached_perm = 0; 52b5ce1d83a62fc109d8e815b1fc71dcdb0d26bc49Yoshihisa Abe spin_lock_init(&ei->c_lock); 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return &ei->vfs_inode; 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 56fa0d7e3de6d6fc5004ad9dea0dd6b286af8f03e9Nick Pigginstatic void coda_i_callback(struct rcu_head *head) 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 58fa0d7e3de6d6fc5004ad9dea0dd6b286af8f03e9Nick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kmem_cache_free(coda_inode_cachep, ITOC(inode)); 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 62fa0d7e3de6d6fc5004ad9dea0dd6b286af8f03e9Nick Pigginstatic void coda_destroy_inode(struct inode *inode) 63fa0d7e3de6d6fc5004ad9dea0dd6b286af8f03e9Nick Piggin{ 64fa0d7e3de6d6fc5004ad9dea0dd6b286af8f03e9Nick Piggin call_rcu(&inode->i_rcu, coda_i_callback); 65fa0d7e3de6d6fc5004ad9dea0dd6b286af8f03e9Nick Piggin} 66fa0d7e3de6d6fc5004ad9dea0dd6b286af8f03e9Nick Piggin 6751cc50685a4275c6a02653670af9f108a64e01cfAlexey Dobriyanstatic void init_once(void *foo) 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct coda_inode_info *ei = (struct coda_inode_info *) foo; 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 71a35afb830f8d71ec211531aeb9a621b09a2efb39Christoph Lameter inode_init_once(&ei->vfs_inode); 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7320c2df83d25c6a95affe6157a4c9cac4cf5ffaacPaul Mundt 745f356fd4d75fd66e62c803fc7a684863c4b38e59Fabian Frederickint __init coda_init_inodecache(void) 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds coda_inode_cachep = kmem_cache_create("coda_inode_cache", 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof(struct coda_inode_info), 784b6a9316fab51af611dc8671f296734089f6a22aPaul Jackson 0, SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, 7920c2df83d25c6a95affe6157a4c9cac4cf5ffaacPaul Mundt init_once); 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (coda_inode_cachep == NULL) 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid coda_destroy_inodecache(void) 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 878c0a85377048b64c880e76ec7368904fe46d0b94Kirill A. Shutemov /* 888c0a85377048b64c880e76ec7368904fe46d0b94Kirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 898c0a85377048b64c880e76ec7368904fe46d0b94Kirill A. Shutemov * destroy cache. 908c0a85377048b64c880e76ec7368904fe46d0b94Kirill A. Shutemov */ 918c0a85377048b64c880e76ec7368904fe46d0b94Kirill A. Shutemov rcu_barrier(); 921a1d92c10dd24bbdc28b3d6e2d03ec199dd3a65bAlexey Dobriyan kmem_cache_destroy(coda_inode_cachep); 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int coda_remount(struct super_block *sb, int *flags, char *data) 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9702b9984d640873b7b3809e63f81a0d7e13496886Theodore Ts'o sync_filesystem(sb); 98fac1f0e34026a656174102ebad4d1cd71cd4fe2cJan Harkes *flags |= MS_NOATIME; 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* exported operations */ 103ee9b6d61a2a43c5952eb43283f8db284a4e70b8aJosef 'Jeff' Sipekstatic const struct super_operations coda_super_operations = 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .alloc_inode = coda_alloc_inode, 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .destroy_inode = coda_destroy_inode, 107b57922d97fd6f79b6dbe6db0c4fd30d219fa08c1Al Viro .evict_inode = coda_evict_inode, 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .put_super = coda_put_super, 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .statfs = coda_statfs, 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .remount_fs = coda_remount, 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int get_device_index(struct coda_mount_data *data) 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1152903ff019b346ab8d36ebbf54853c3aaf6590608Al Viro struct fd f; 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct inode *inode; 1172903ff019b346ab8d36ebbf54853c3aaf6590608Al Viro int idx; 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11978f7d75e5dd9aa1027e90d0b71d394603933c2edAl Viro if (data == NULL) { 1206d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick pr_warn("%s: Bad mount data\n", __func__); 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12478f7d75e5dd9aa1027e90d0b71d394603933c2edAl Viro if (data->version != CODA_MOUNT_VERSION) { 1256d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick pr_warn("%s: Bad mount version\n", __func__); 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1292903ff019b346ab8d36ebbf54853c3aaf6590608Al Viro f = fdget(data->fd); 1302903ff019b346ab8d36ebbf54853c3aaf6590608Al Viro if (!f.file) 13178f7d75e5dd9aa1027e90d0b71d394603933c2edAl Viro goto Ebadf; 132496ad9aa8ef448058e36ca7a787c61f2e63f0f54Al Viro inode = file_inode(f.file); 13378f7d75e5dd9aa1027e90d0b71d394603933c2edAl Viro if (!S_ISCHR(inode->i_mode) || imajor(inode) != CODA_PSDEV_MAJOR) { 1342903ff019b346ab8d36ebbf54853c3aaf6590608Al Viro fdput(f); 13578f7d75e5dd9aa1027e90d0b71d394603933c2edAl Viro goto Ebadf; 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds idx = iminor(inode); 1392903ff019b346ab8d36ebbf54853c3aaf6590608Al Viro fdput(f); 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14178f7d75e5dd9aa1027e90d0b71d394603933c2edAl Viro if (idx < 0 || idx >= MAX_CODADEVS) { 1426d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick pr_warn("%s: Bad minor number\n", __func__); 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return idx; 14778f7d75e5dd9aa1027e90d0b71d394603933c2edAl ViroEbadf: 1486d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick pr_warn("%s: Bad file\n", __func__); 14978f7d75e5dd9aa1027e90d0b71d394603933c2edAl Viro return -1; 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int coda_fill_super(struct super_block *sb, void *data, int silent) 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 154a1b0aa87647493c0201821ab884e86298d5da7d6Jan Harkes struct inode *root = NULL; 155da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe struct venus_comm *vc; 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct CodaFid fid; 157a1b0aa87647493c0201821ab884e86298d5da7d6Jan Harkes int error; 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int idx; 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1609fd973e085f7759f710603422b2e11ad5f2e000dEric W. Biederman if (task_active_pid_ns(current) != &init_pid_ns) 1619fd973e085f7759f710603422b2e11ad5f2e000dEric W. Biederman return -EINVAL; 1629fd973e085f7759f710603422b2e11ad5f2e000dEric W. Biederman 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds idx = get_device_index((struct coda_mount_data *) data); 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Ignore errors in data, for backward compatibility */ 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(idx == -1) 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds idx = 0; 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1696d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick pr_info("%s: device index: %i\n", __func__, idx); 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vc = &coda_comms[idx]; 172da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe mutex_lock(&vc->vc_mutex); 173f7cc02b8715618e179242ba9cc10bdc5146ae565Yoshihisa Abe 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!vc->vc_inuse) { 1756d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick pr_warn("%s: No pseudo device\n", __func__); 176f7cc02b8715618e179242ba9cc10bdc5146ae565Yoshihisa Abe error = -EINVAL; 177f7cc02b8715618e179242ba9cc10bdc5146ae565Yoshihisa Abe goto unlock_out; 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 180f7cc02b8715618e179242ba9cc10bdc5146ae565Yoshihisa Abe if (vc->vc_sb) { 1816d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick pr_warn("%s: Device already mounted\n", __func__); 182f7cc02b8715618e179242ba9cc10bdc5146ae565Yoshihisa Abe error = -EBUSY; 183f7cc02b8715618e179242ba9cc10bdc5146ae565Yoshihisa Abe goto unlock_out; 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1865163d90076729413cb882d3dd5c3d3cfb5b9f035Jens Axboe error = bdi_setup_and_register(&vc->bdi, "coda", BDI_CAP_MAP_COPY); 1875163d90076729413cb882d3dd5c3d3cfb5b9f035Jens Axboe if (error) 188f7cc02b8715618e179242ba9cc10bdc5146ae565Yoshihisa Abe goto unlock_out; 1895163d90076729413cb882d3dd5c3d3cfb5b9f035Jens Axboe 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vc->vc_sb = sb; 191da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe mutex_unlock(&vc->vc_mutex); 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 193a1b0aa87647493c0201821ab884e86298d5da7d6Jan Harkes sb->s_fs_info = vc; 194fac1f0e34026a656174102ebad4d1cd71cd4fe2cJan Harkes sb->s_flags |= MS_NOATIME; 195fac1f0e34026a656174102ebad4d1cd71cd4fe2cJan Harkes sb->s_blocksize = 4096; /* XXXXX what do we put here?? */ 196fac1f0e34026a656174102ebad4d1cd71cd4fe2cJan Harkes sb->s_blocksize_bits = 12; 197fac1f0e34026a656174102ebad4d1cd71cd4fe2cJan Harkes sb->s_magic = CODA_SUPER_MAGIC; 198fac1f0e34026a656174102ebad4d1cd71cd4fe2cJan Harkes sb->s_op = &coda_super_operations; 1999501e4c48e1561443e1a16c2c9917ec6c63118a4Al Viro sb->s_d_op = &coda_dentry_operations; 2005163d90076729413cb882d3dd5c3d3cfb5b9f035Jens Axboe sb->s_bdi = &vc->bdi; 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* get root fid from Venus: this needs the root inode */ 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds error = venus_rootfid(sb, &fid); 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ( error ) { 2056d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick pr_warn("%s: coda_get_rootfid failed with %d\n", 2066d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick __func__, error); 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2096d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick pr_info("%s: rootfid is %s\n", __func__, coda_f2s(&fid)); 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* make root inode */ 212f4947fbce208990266920d51837e4e7ba9779db1Al Viro root = coda_cnode_make(&fid, sb); 213f4947fbce208990266920d51837e4e7ba9779db1Al Viro if (IS_ERR(root)) { 214f4947fbce208990266920d51837e4e7ba9779db1Al Viro error = PTR_ERR(root); 215d9b4b3195a06e646c357f6108a424569b1a920d9Fabian Frederick pr_warn("Failure of coda_cnode_make for root: error %d\n", 216d9b4b3195a06e646c357f6108a424569b1a920d9Fabian Frederick error); 217f4947fbce208990266920d51837e4e7ba9779db1Al Viro goto error; 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2206d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick pr_info("%s: rootinode is %ld dev %s\n", 2216d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick __func__, root->i_ino, root->i_sb->s_id); 22248fde701aff662559b38d9a609574068f22d00feAl Viro sb->s_root = d_make_root(root); 223f7cc02b8715618e179242ba9cc10bdc5146ae565Yoshihisa Abe if (!sb->s_root) { 224f7cc02b8715618e179242ba9cc10bdc5146ae565Yoshihisa Abe error = -EINVAL; 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 226f7cc02b8715618e179242ba9cc10bdc5146ae565Yoshihisa Abe } 227db71922217a214e5c9268448e537b54fc1f301eaJan Blunck return 0; 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 229f7cc02b8715618e179242ba9cc10bdc5146ae565Yoshihisa Abeerror: 230da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe mutex_lock(&vc->vc_mutex); 231f7cc02b8715618e179242ba9cc10bdc5146ae565Yoshihisa Abe bdi_destroy(&vc->bdi); 232f7cc02b8715618e179242ba9cc10bdc5146ae565Yoshihisa Abe vc->vc_sb = NULL; 233f7cc02b8715618e179242ba9cc10bdc5146ae565Yoshihisa Abe sb->s_fs_info = NULL; 234f7cc02b8715618e179242ba9cc10bdc5146ae565Yoshihisa Abeunlock_out: 235da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe mutex_unlock(&vc->vc_mutex); 236f7cc02b8715618e179242ba9cc10bdc5146ae565Yoshihisa Abe return error; 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void coda_put_super(struct super_block *sb) 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 241da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe struct venus_comm *vcp = coda_vcp(sb); 242da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe mutex_lock(&vcp->vc_mutex); 243da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe bdi_destroy(&vcp->bdi); 244da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe vcp->vc_sb = NULL; 245a1b0aa87647493c0201821ab884e86298d5da7d6Jan Harkes sb->s_fs_info = NULL; 246da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe mutex_unlock(&vcp->vc_mutex); 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 248f38cfb2564f5fead53eebd9617258ee0376b1906Fabian Frederick pr_info("Bye bye.\n"); 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 251b57922d97fd6f79b6dbe6db0c4fd30d219fa08c1Al Virostatic void coda_evict_inode(struct inode *inode) 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 25391b0abe36a7b2b3b02d7500925a5f8455334f0e5Johannes Weiner truncate_inode_pages_final(&inode->i_data); 254dbd5768f87ff6fb0a4fe09c4d7b6c4a24de99430Jan Kara clear_inode(inode); 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds coda_cache_clear_inode(inode); 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint coda_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 26011d100d9a291508be5a5bae1ddf92ea2ba9b8f0cAl Viro int err = coda_revalidate_inode(dentry->d_inode); 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!err) 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds generic_fillattr(dentry->d_inode, stat); 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint coda_setattr(struct dentry *de, struct iattr *iattr) 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct inode *inode = de->d_inode; 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct coda_vattr vattr; 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int error; 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(&vattr, 0, sizeof(vattr)); 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds inode->i_ctime = CURRENT_TIME_SEC; 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds coda_iattr_to_vattr(iattr, &vattr); 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vattr.va_type = C_VNON; /* cannot set type */ 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Venus is responsible for truncating the container-file!!! */ 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds error = venus_setattr(inode->i_sb, coda_i2f(inode), &vattr); 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 281f7cc02b8715618e179242ba9cc10bdc5146ae565Yoshihisa Abe if (!error) { 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds coda_vattr_to_iattr(inode, &vattr); 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds coda_cache_clear_inode(inode); 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return error; 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 288754661f143e70d66eae6c48532ca245aa05dec0eArjan van de Venconst struct inode_operations coda_file_inode_operations = { 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .permission = coda_permission, 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .getattr = coda_getattr, 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .setattr = coda_setattr, 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 294726c334223180e3c0197cc980a432681370d4bafDavid Howellsstatic int coda_statfs(struct dentry *dentry, struct kstatfs *buf) 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int error; 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 298726c334223180e3c0197cc980a432681370d4bafDavid Howells error = venus_statfs(dentry, buf); 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (error) { 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* fake something like AFS does */ 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->f_blocks = 9000000; 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->f_bfree = 9000000; 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->f_bavail = 9000000; 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->f_files = 9000000; 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->f_ffree = 9000000; 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* and fill in the rest */ 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->f_type = CODA_SUPER_MAGIC; 311fac1f0e34026a656174102ebad4d1cd71cd4fe2cJan Harkes buf->f_bsize = 4096; 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->f_namelen = CODA_MAXNAMLEN; 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* init_coda: used by filesystems.c to register coda */ 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3193c26ff6e499ee7e6f9f2bc7da5f2f30d80862ecfAl Virostatic struct dentry *coda_mount(struct file_system_type *fs_type, 3203c26ff6e499ee7e6f9f2bc7da5f2f30d80862ecfAl Viro int flags, const char *dev_name, void *data) 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3223c26ff6e499ee7e6f9f2bc7da5f2f30d80862ecfAl Viro return mount_nodev(fs_type, flags, data, coda_fill_super); 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct file_system_type coda_fs_type = { 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .owner = THIS_MODULE, 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "coda", 3283c26ff6e499ee7e6f9f2bc7da5f2f30d80862ecfAl Viro .mount = coda_mount, 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .kill_sb = kill_anon_super, 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .fs_flags = FS_BINARY_MOUNTDATA, 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 3327f78e0351394052e1a6293e175825eb5c7869507Eric W. BiedermanMODULE_ALIAS_FS("coda"); 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 334