11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Copyright (c) 2000-2001 Christoph Hellwig. 31da177e4SLinus Torvalds * All rights reserved. 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Redistribution and use in source and binary forms, with or without 61da177e4SLinus Torvalds * modification, are permitted provided that the following conditions 71da177e4SLinus Torvalds * are met: 81da177e4SLinus Torvalds * 1. Redistributions of source code must retain the above copyright 91da177e4SLinus Torvalds * notice, this list of conditions, and the following disclaimer, 101da177e4SLinus Torvalds * without modification. 111da177e4SLinus Torvalds * 2. The name of the author may not be used to endorse or promote products 121da177e4SLinus Torvalds * derived from this software without specific prior written permission. 131da177e4SLinus Torvalds * 141da177e4SLinus Torvalds * Alternatively, this software may be distributed under the terms of the 151da177e4SLinus Torvalds * GNU General Public License ("GPL"). 161da177e4SLinus Torvalds * 171da177e4SLinus Torvalds * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 181da177e4SLinus Torvalds * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191da177e4SLinus Torvalds * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201da177e4SLinus Torvalds * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 211da177e4SLinus Torvalds * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221da177e4SLinus Torvalds * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231da177e4SLinus Torvalds * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241da177e4SLinus Torvalds * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251da177e4SLinus Torvalds * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261da177e4SLinus Torvalds * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271da177e4SLinus Torvalds * SUCH DAMAGE. 281da177e4SLinus Torvalds */ 291da177e4SLinus Torvalds 301da177e4SLinus Torvalds /* 311da177e4SLinus Torvalds * Veritas filesystem driver - inode routines. 321da177e4SLinus Torvalds */ 331da177e4SLinus Torvalds #include <linux/fs.h> 341da177e4SLinus Torvalds #include <linux/buffer_head.h> 351da177e4SLinus Torvalds #include <linux/pagemap.h> 361da177e4SLinus Torvalds #include <linux/kernel.h> 371da177e4SLinus Torvalds #include <linux/slab.h> 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds #include "vxfs.h" 401da177e4SLinus Torvalds #include "vxfs_inode.h" 411da177e4SLinus Torvalds #include "vxfs_extern.h" 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds extern struct address_space_operations vxfs_aops; 451da177e4SLinus Torvalds extern struct address_space_operations vxfs_immed_aops; 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds extern struct inode_operations vxfs_immed_symlink_iops; 481da177e4SLinus Torvalds 491da177e4SLinus Torvalds static struct file_operations vxfs_file_operations = { 501da177e4SLinus Torvalds .open = generic_file_open, 511da177e4SLinus Torvalds .llseek = generic_file_llseek, 521da177e4SLinus Torvalds .read = generic_file_read, 531da177e4SLinus Torvalds .mmap = generic_file_mmap, 541da177e4SLinus Torvalds .sendfile = generic_file_sendfile, 551da177e4SLinus Torvalds }; 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds kmem_cache_t *vxfs_inode_cachep; 591da177e4SLinus Torvalds 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds #ifdef DIAGNOSTIC 621da177e4SLinus Torvalds /* 631da177e4SLinus Torvalds * Dump inode contents (partially). 641da177e4SLinus Torvalds */ 651da177e4SLinus Torvalds void 661da177e4SLinus Torvalds vxfs_dumpi(struct vxfs_inode_info *vip, ino_t ino) 671da177e4SLinus Torvalds { 681da177e4SLinus Torvalds printk(KERN_DEBUG "\n\n"); 691da177e4SLinus Torvalds if (ino) 701da177e4SLinus Torvalds printk(KERN_DEBUG "dumping vxfs inode %ld\n", ino); 711da177e4SLinus Torvalds else 721da177e4SLinus Torvalds printk(KERN_DEBUG "dumping unknown vxfs inode\n"); 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds printk(KERN_DEBUG "---------------------------\n"); 751da177e4SLinus Torvalds printk(KERN_DEBUG "mode is %x\n", vip->vii_mode); 761da177e4SLinus Torvalds printk(KERN_DEBUG "nlink:%u, uid:%u, gid:%u\n", 771da177e4SLinus Torvalds vip->vii_nlink, vip->vii_uid, vip->vii_gid); 781da177e4SLinus Torvalds printk(KERN_DEBUG "size:%Lx, blocks:%u\n", 791da177e4SLinus Torvalds vip->vii_size, vip->vii_blocks); 801da177e4SLinus Torvalds printk(KERN_DEBUG "orgtype:%u\n", vip->vii_orgtype); 811da177e4SLinus Torvalds } 821da177e4SLinus Torvalds #endif 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds /** 861da177e4SLinus Torvalds * vxfs_blkiget - find inode based on extent # 871da177e4SLinus Torvalds * @sbp: superblock of the filesystem we search in 881da177e4SLinus Torvalds * @extent: number of the extent to search 891da177e4SLinus Torvalds * @ino: inode number to search 901da177e4SLinus Torvalds * 911da177e4SLinus Torvalds * Description: 921da177e4SLinus Torvalds * vxfs_blkiget searches inode @ino in the filesystem described by 931da177e4SLinus Torvalds * @sbp in the extent @extent. 941da177e4SLinus Torvalds * Returns the matching VxFS inode on success, else a NULL pointer. 951da177e4SLinus Torvalds * 961da177e4SLinus Torvalds * NOTE: 971da177e4SLinus Torvalds * While __vxfs_iget uses the pagecache vxfs_blkiget uses the 981da177e4SLinus Torvalds * buffercache. This function should not be used outside the 991da177e4SLinus Torvalds * read_super() method, otherwise the data may be incoherent. 1001da177e4SLinus Torvalds */ 1011da177e4SLinus Torvalds struct vxfs_inode_info * 1021da177e4SLinus Torvalds vxfs_blkiget(struct super_block *sbp, u_long extent, ino_t ino) 1031da177e4SLinus Torvalds { 1041da177e4SLinus Torvalds struct buffer_head *bp; 1051da177e4SLinus Torvalds u_long block, offset; 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds block = extent + ((ino * VXFS_ISIZE) / sbp->s_blocksize); 1081da177e4SLinus Torvalds offset = ((ino % (sbp->s_blocksize / VXFS_ISIZE)) * VXFS_ISIZE); 1091da177e4SLinus Torvalds bp = sb_bread(sbp, block); 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvalds if (buffer_mapped(bp)) { 1121da177e4SLinus Torvalds struct vxfs_inode_info *vip; 1131da177e4SLinus Torvalds struct vxfs_dinode *dip; 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds if (!(vip = kmem_cache_alloc(vxfs_inode_cachep, SLAB_KERNEL))) 1161da177e4SLinus Torvalds goto fail; 1171da177e4SLinus Torvalds dip = (struct vxfs_dinode *)(bp->b_data + offset); 1181da177e4SLinus Torvalds memcpy(vip, dip, sizeof(*vip)); 1191da177e4SLinus Torvalds #ifdef DIAGNOSTIC 1201da177e4SLinus Torvalds vxfs_dumpi(vip, ino); 1211da177e4SLinus Torvalds #endif 1221da177e4SLinus Torvalds brelse(bp); 1231da177e4SLinus Torvalds return (vip); 1241da177e4SLinus Torvalds } 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds fail: 1271da177e4SLinus Torvalds printk(KERN_WARNING "vxfs: unable to read block %ld\n", block); 1281da177e4SLinus Torvalds brelse(bp); 1291da177e4SLinus Torvalds return NULL; 1301da177e4SLinus Torvalds } 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds /** 1331da177e4SLinus Torvalds * __vxfs_iget - generic find inode facility 1341da177e4SLinus Torvalds * @sbp: VFS superblock 1351da177e4SLinus Torvalds * @ino: inode number 1361da177e4SLinus Torvalds * @ilistp: inode list 1371da177e4SLinus Torvalds * 1381da177e4SLinus Torvalds * Description: 1391da177e4SLinus Torvalds * Search the for inode number @ino in the filesystem 1401da177e4SLinus Torvalds * described by @sbp. Use the specified inode table (@ilistp). 1411da177e4SLinus Torvalds * Returns the matching VxFS inode on success, else a NULL pointer. 1421da177e4SLinus Torvalds */ 1431da177e4SLinus Torvalds static struct vxfs_inode_info * 1441da177e4SLinus Torvalds __vxfs_iget(ino_t ino, struct inode *ilistp) 1451da177e4SLinus Torvalds { 1461da177e4SLinus Torvalds struct page *pp; 1471da177e4SLinus Torvalds u_long offset; 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds offset = (ino % (PAGE_SIZE / VXFS_ISIZE)) * VXFS_ISIZE; 1501da177e4SLinus Torvalds pp = vxfs_get_page(ilistp->i_mapping, ino * VXFS_ISIZE / PAGE_SIZE); 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds if (!IS_ERR(pp)) { 1531da177e4SLinus Torvalds struct vxfs_inode_info *vip; 1541da177e4SLinus Torvalds struct vxfs_dinode *dip; 1551da177e4SLinus Torvalds caddr_t kaddr = (char *)page_address(pp); 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvalds if (!(vip = kmem_cache_alloc(vxfs_inode_cachep, SLAB_KERNEL))) 1581da177e4SLinus Torvalds goto fail; 1591da177e4SLinus Torvalds dip = (struct vxfs_dinode *)(kaddr + offset); 1601da177e4SLinus Torvalds memcpy(vip, dip, sizeof(*vip)); 1611da177e4SLinus Torvalds #ifdef DIAGNOSTIC 1621da177e4SLinus Torvalds vxfs_dumpi(vip, ino); 1631da177e4SLinus Torvalds #endif 1641da177e4SLinus Torvalds vxfs_put_page(pp); 1651da177e4SLinus Torvalds return (vip); 1661da177e4SLinus Torvalds } 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds printk(KERN_WARNING "vxfs: error on page %p\n", pp); 1691da177e4SLinus Torvalds return NULL; 1701da177e4SLinus Torvalds 1711da177e4SLinus Torvalds fail: 1721da177e4SLinus Torvalds printk(KERN_WARNING "vxfs: unable to read inode %ld\n", (unsigned long)ino); 1731da177e4SLinus Torvalds vxfs_put_page(pp); 1741da177e4SLinus Torvalds return NULL; 1751da177e4SLinus Torvalds } 1761da177e4SLinus Torvalds 1771da177e4SLinus Torvalds /** 1781da177e4SLinus Torvalds * vxfs_stiget - find inode using the structural inode list 1791da177e4SLinus Torvalds * @sbp: VFS superblock 1801da177e4SLinus Torvalds * @ino: inode # 1811da177e4SLinus Torvalds * 1821da177e4SLinus Torvalds * Description: 1831da177e4SLinus Torvalds * Find inode @ino in the filesystem described by @sbp using 1841da177e4SLinus Torvalds * the structural inode list. 1851da177e4SLinus Torvalds * Returns the matching VxFS inode on success, else a NULL pointer. 1861da177e4SLinus Torvalds */ 1871da177e4SLinus Torvalds struct vxfs_inode_info * 1881da177e4SLinus Torvalds vxfs_stiget(struct super_block *sbp, ino_t ino) 1891da177e4SLinus Torvalds { 1901da177e4SLinus Torvalds return __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_stilist); 1911da177e4SLinus Torvalds } 1921da177e4SLinus Torvalds 1931da177e4SLinus Torvalds /** 1941da177e4SLinus Torvalds * vxfs_transmod - mode for a VxFS inode 1951da177e4SLinus Torvalds * @vip: VxFS inode 1961da177e4SLinus Torvalds * 1971da177e4SLinus Torvalds * Description: 1981da177e4SLinus Torvalds * vxfs_transmod returns a Linux mode_t for a given 1991da177e4SLinus Torvalds * VxFS inode structure. 2001da177e4SLinus Torvalds */ 2011da177e4SLinus Torvalds static __inline__ mode_t 2021da177e4SLinus Torvalds vxfs_transmod(struct vxfs_inode_info *vip) 2031da177e4SLinus Torvalds { 2041da177e4SLinus Torvalds mode_t ret = vip->vii_mode & ~VXFS_TYPE_MASK; 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds if (VXFS_ISFIFO(vip)) 2071da177e4SLinus Torvalds ret |= S_IFIFO; 2081da177e4SLinus Torvalds if (VXFS_ISCHR(vip)) 2091da177e4SLinus Torvalds ret |= S_IFCHR; 2101da177e4SLinus Torvalds if (VXFS_ISDIR(vip)) 2111da177e4SLinus Torvalds ret |= S_IFDIR; 2121da177e4SLinus Torvalds if (VXFS_ISBLK(vip)) 2131da177e4SLinus Torvalds ret |= S_IFBLK; 2141da177e4SLinus Torvalds if (VXFS_ISLNK(vip)) 2151da177e4SLinus Torvalds ret |= S_IFLNK; 2161da177e4SLinus Torvalds if (VXFS_ISREG(vip)) 2171da177e4SLinus Torvalds ret |= S_IFREG; 2181da177e4SLinus Torvalds if (VXFS_ISSOC(vip)) 2191da177e4SLinus Torvalds ret |= S_IFSOCK; 2201da177e4SLinus Torvalds 2211da177e4SLinus Torvalds return (ret); 2221da177e4SLinus Torvalds } 2231da177e4SLinus Torvalds 2241da177e4SLinus Torvalds /** 2251da177e4SLinus Torvalds * vxfs_iinit- helper to fill inode fields 2261da177e4SLinus Torvalds * @ip: VFS inode 2271da177e4SLinus Torvalds * @vip: VxFS inode 2281da177e4SLinus Torvalds * 2291da177e4SLinus Torvalds * Description: 2301da177e4SLinus Torvalds * vxfs_instino is a helper function to fill in all relevant 2311da177e4SLinus Torvalds * fields in @ip from @vip. 2321da177e4SLinus Torvalds */ 2331da177e4SLinus Torvalds static void 2341da177e4SLinus Torvalds vxfs_iinit(struct inode *ip, struct vxfs_inode_info *vip) 2351da177e4SLinus Torvalds { 2361da177e4SLinus Torvalds 2371da177e4SLinus Torvalds ip->i_mode = vxfs_transmod(vip); 2381da177e4SLinus Torvalds ip->i_uid = (uid_t)vip->vii_uid; 2391da177e4SLinus Torvalds ip->i_gid = (gid_t)vip->vii_gid; 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds ip->i_nlink = vip->vii_nlink; 2421da177e4SLinus Torvalds ip->i_size = vip->vii_size; 2431da177e4SLinus Torvalds 2441da177e4SLinus Torvalds ip->i_atime.tv_sec = vip->vii_atime; 2451da177e4SLinus Torvalds ip->i_ctime.tv_sec = vip->vii_ctime; 2461da177e4SLinus Torvalds ip->i_mtime.tv_sec = vip->vii_mtime; 2471da177e4SLinus Torvalds ip->i_atime.tv_nsec = 0; 2481da177e4SLinus Torvalds ip->i_ctime.tv_nsec = 0; 2491da177e4SLinus Torvalds ip->i_mtime.tv_nsec = 0; 2501da177e4SLinus Torvalds 2511da177e4SLinus Torvalds ip->i_blksize = PAGE_SIZE; 2521da177e4SLinus Torvalds ip->i_blocks = vip->vii_blocks; 2531da177e4SLinus Torvalds ip->i_generation = vip->vii_gen; 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds ip->u.generic_ip = (void *)vip; 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds } 2581da177e4SLinus Torvalds 2591da177e4SLinus Torvalds /** 2601da177e4SLinus Torvalds * vxfs_get_fake_inode - get fake inode structure 2611da177e4SLinus Torvalds * @sbp: filesystem superblock 2621da177e4SLinus Torvalds * @vip: fspriv inode 2631da177e4SLinus Torvalds * 2641da177e4SLinus Torvalds * Description: 2651da177e4SLinus Torvalds * vxfs_fake_inode gets a fake inode (not in the inode hash) for a 2661da177e4SLinus Torvalds * superblock, vxfs_inode pair. 2671da177e4SLinus Torvalds * Returns the filled VFS inode. 2681da177e4SLinus Torvalds */ 2691da177e4SLinus Torvalds struct inode * 2701da177e4SLinus Torvalds vxfs_get_fake_inode(struct super_block *sbp, struct vxfs_inode_info *vip) 2711da177e4SLinus Torvalds { 2721da177e4SLinus Torvalds struct inode *ip = NULL; 2731da177e4SLinus Torvalds 2741da177e4SLinus Torvalds if ((ip = new_inode(sbp))) { 2751da177e4SLinus Torvalds vxfs_iinit(ip, vip); 2761da177e4SLinus Torvalds ip->i_mapping->a_ops = &vxfs_aops; 2771da177e4SLinus Torvalds } 2781da177e4SLinus Torvalds return (ip); 2791da177e4SLinus Torvalds } 2801da177e4SLinus Torvalds 2811da177e4SLinus Torvalds /** 2821da177e4SLinus Torvalds * vxfs_put_fake_inode - free faked inode 2831da177e4SLinus Torvalds * *ip: VFS inode 2841da177e4SLinus Torvalds * 2851da177e4SLinus Torvalds * Description: 2861da177e4SLinus Torvalds * vxfs_put_fake_inode frees all data asssociated with @ip. 2871da177e4SLinus Torvalds */ 2881da177e4SLinus Torvalds void 2891da177e4SLinus Torvalds vxfs_put_fake_inode(struct inode *ip) 2901da177e4SLinus Torvalds { 2911da177e4SLinus Torvalds iput(ip); 2921da177e4SLinus Torvalds } 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds /** 2951da177e4SLinus Torvalds * vxfs_read_inode - fill in inode information 2961da177e4SLinus Torvalds * @ip: inode pointer to fill 2971da177e4SLinus Torvalds * 2981da177e4SLinus Torvalds * Description: 2991da177e4SLinus Torvalds * vxfs_read_inode reads the disk inode for @ip and fills 3001da177e4SLinus Torvalds * in all relevant fields in @ip. 3011da177e4SLinus Torvalds */ 3021da177e4SLinus Torvalds void 3031da177e4SLinus Torvalds vxfs_read_inode(struct inode *ip) 3041da177e4SLinus Torvalds { 3051da177e4SLinus Torvalds struct super_block *sbp = ip->i_sb; 3061da177e4SLinus Torvalds struct vxfs_inode_info *vip; 3071da177e4SLinus Torvalds struct address_space_operations *aops; 3081da177e4SLinus Torvalds ino_t ino = ip->i_ino; 3091da177e4SLinus Torvalds 3101da177e4SLinus Torvalds if (!(vip = __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_ilist))) 3111da177e4SLinus Torvalds return; 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvalds vxfs_iinit(ip, vip); 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvalds if (VXFS_ISIMMED(vip)) 3161da177e4SLinus Torvalds aops = &vxfs_immed_aops; 3171da177e4SLinus Torvalds else 3181da177e4SLinus Torvalds aops = &vxfs_aops; 3191da177e4SLinus Torvalds 3201da177e4SLinus Torvalds if (S_ISREG(ip->i_mode)) { 3211da177e4SLinus Torvalds ip->i_fop = &vxfs_file_operations; 3221da177e4SLinus Torvalds ip->i_mapping->a_ops = aops; 3231da177e4SLinus Torvalds } else if (S_ISDIR(ip->i_mode)) { 3241da177e4SLinus Torvalds ip->i_op = &vxfs_dir_inode_ops; 3251da177e4SLinus Torvalds ip->i_fop = &vxfs_dir_operations; 3261da177e4SLinus Torvalds ip->i_mapping->a_ops = aops; 3271da177e4SLinus Torvalds } else if (S_ISLNK(ip->i_mode)) { 3281da177e4SLinus Torvalds if (!VXFS_ISIMMED(vip)) { 3291da177e4SLinus Torvalds ip->i_op = &page_symlink_inode_operations; 3301da177e4SLinus Torvalds ip->i_mapping->a_ops = &vxfs_aops; 3311da177e4SLinus Torvalds } else 3321da177e4SLinus Torvalds ip->i_op = &vxfs_immed_symlink_iops; 3331da177e4SLinus Torvalds } else 3341da177e4SLinus Torvalds init_special_inode(ip, ip->i_mode, old_decode_dev(vip->vii_rdev)); 3351da177e4SLinus Torvalds 3361da177e4SLinus Torvalds return; 3371da177e4SLinus Torvalds } 3381da177e4SLinus Torvalds 3391da177e4SLinus Torvalds /** 3401da177e4SLinus Torvalds * vxfs_clear_inode - remove inode from main memory 3411da177e4SLinus Torvalds * @ip: inode to discard. 3421da177e4SLinus Torvalds * 3431da177e4SLinus Torvalds * Description: 3441da177e4SLinus Torvalds * vxfs_clear_inode() is called on the final iput and frees the private 3451da177e4SLinus Torvalds * inode area. 3461da177e4SLinus Torvalds */ 3471da177e4SLinus Torvalds void 3481da177e4SLinus Torvalds vxfs_clear_inode(struct inode *ip) 3491da177e4SLinus Torvalds { 3501da177e4SLinus Torvalds kmem_cache_free(vxfs_inode_cachep, ip->u.generic_ip); 3511da177e4SLinus Torvalds } 352