1*0b1e987cSChristoph Hellwig // SPDX-License-Identifier: GPL-2.0-only 21da177e4SLinus Torvalds /* 31da177e4SLinus Torvalds * Copyright (c) 2000-2001 Christoph Hellwig. 41cce1701SKrzysztof Błaszkowski * Copyright (c) 2016 Krzysztof Blaszkowski 51da177e4SLinus Torvalds */ 61da177e4SLinus Torvalds 71da177e4SLinus Torvalds /* 81da177e4SLinus Torvalds * Veritas filesystem driver - inode routines. 91da177e4SLinus Torvalds */ 101da177e4SLinus Torvalds #include <linux/fs.h> 111da177e4SLinus Torvalds #include <linux/buffer_head.h> 121da177e4SLinus Torvalds #include <linux/pagemap.h> 131da177e4SLinus Torvalds #include <linux/kernel.h> 141da177e4SLinus Torvalds #include <linux/slab.h> 15df64c082SAl Viro #include <linux/namei.h> 161da177e4SLinus Torvalds 171da177e4SLinus Torvalds #include "vxfs.h" 181da177e4SLinus Torvalds #include "vxfs_inode.h" 191da177e4SLinus Torvalds #include "vxfs_extern.h" 201da177e4SLinus Torvalds 211da177e4SLinus Torvalds 221da177e4SLinus Torvalds #ifdef DIAGNOSTIC 231da177e4SLinus Torvalds /* 241da177e4SLinus Torvalds * Dump inode contents (partially). 251da177e4SLinus Torvalds */ 261da177e4SLinus Torvalds void 271da177e4SLinus Torvalds vxfs_dumpi(struct vxfs_inode_info *vip, ino_t ino) 281da177e4SLinus Torvalds { 291da177e4SLinus Torvalds printk(KERN_DEBUG "\n\n"); 301da177e4SLinus Torvalds if (ino) 311da177e4SLinus Torvalds printk(KERN_DEBUG "dumping vxfs inode %ld\n", ino); 321da177e4SLinus Torvalds else 331da177e4SLinus Torvalds printk(KERN_DEBUG "dumping unknown vxfs inode\n"); 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds printk(KERN_DEBUG "---------------------------\n"); 361da177e4SLinus Torvalds printk(KERN_DEBUG "mode is %x\n", vip->vii_mode); 371da177e4SLinus Torvalds printk(KERN_DEBUG "nlink:%u, uid:%u, gid:%u\n", 381da177e4SLinus Torvalds vip->vii_nlink, vip->vii_uid, vip->vii_gid); 391da177e4SLinus Torvalds printk(KERN_DEBUG "size:%Lx, blocks:%u\n", 401da177e4SLinus Torvalds vip->vii_size, vip->vii_blocks); 411da177e4SLinus Torvalds printk(KERN_DEBUG "orgtype:%u\n", vip->vii_orgtype); 421da177e4SLinus Torvalds } 431da177e4SLinus Torvalds #endif 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds /** 461da177e4SLinus Torvalds * vxfs_transmod - mode for a VxFS inode 471da177e4SLinus Torvalds * @vip: VxFS inode 481da177e4SLinus Torvalds * 491da177e4SLinus Torvalds * Description: 501da177e4SLinus Torvalds * vxfs_transmod returns a Linux mode_t for a given 511da177e4SLinus Torvalds * VxFS inode structure. 521da177e4SLinus Torvalds */ 53175a4eb7SAl Viro static __inline__ umode_t 541da177e4SLinus Torvalds vxfs_transmod(struct vxfs_inode_info *vip) 551da177e4SLinus Torvalds { 56175a4eb7SAl Viro umode_t ret = vip->vii_mode & ~VXFS_TYPE_MASK; 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds if (VXFS_ISFIFO(vip)) 591da177e4SLinus Torvalds ret |= S_IFIFO; 601da177e4SLinus Torvalds if (VXFS_ISCHR(vip)) 611da177e4SLinus Torvalds ret |= S_IFCHR; 621da177e4SLinus Torvalds if (VXFS_ISDIR(vip)) 631da177e4SLinus Torvalds ret |= S_IFDIR; 641da177e4SLinus Torvalds if (VXFS_ISBLK(vip)) 651da177e4SLinus Torvalds ret |= S_IFBLK; 661da177e4SLinus Torvalds if (VXFS_ISLNK(vip)) 671da177e4SLinus Torvalds ret |= S_IFLNK; 681da177e4SLinus Torvalds if (VXFS_ISREG(vip)) 691da177e4SLinus Torvalds ret |= S_IFREG; 701da177e4SLinus Torvalds if (VXFS_ISSOC(vip)) 711da177e4SLinus Torvalds ret |= S_IFSOCK; 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds return (ret); 741da177e4SLinus Torvalds } 751da177e4SLinus Torvalds 762f137e31SChristoph Hellwig static inline void dip2vip_cpy(struct vxfs_sb_info *sbi, 772f137e31SChristoph Hellwig struct vxfs_inode_info *vip, struct vxfs_dinode *dip) 781da177e4SLinus Torvalds { 792f137e31SChristoph Hellwig struct inode *inode = &vip->vfs_inode; 801da177e4SLinus Torvalds 812f137e31SChristoph Hellwig vip->vii_mode = fs32_to_cpu(sbi, dip->vdi_mode); 822f137e31SChristoph Hellwig vip->vii_nlink = fs32_to_cpu(sbi, dip->vdi_nlink); 832f137e31SChristoph Hellwig vip->vii_uid = fs32_to_cpu(sbi, dip->vdi_uid); 842f137e31SChristoph Hellwig vip->vii_gid = fs32_to_cpu(sbi, dip->vdi_gid); 852f137e31SChristoph Hellwig vip->vii_size = fs64_to_cpu(sbi, dip->vdi_size); 862f137e31SChristoph Hellwig vip->vii_atime = fs32_to_cpu(sbi, dip->vdi_atime); 872f137e31SChristoph Hellwig vip->vii_autime = fs32_to_cpu(sbi, dip->vdi_autime); 882f137e31SChristoph Hellwig vip->vii_mtime = fs32_to_cpu(sbi, dip->vdi_mtime); 892f137e31SChristoph Hellwig vip->vii_mutime = fs32_to_cpu(sbi, dip->vdi_mutime); 902f137e31SChristoph Hellwig vip->vii_ctime = fs32_to_cpu(sbi, dip->vdi_ctime); 912f137e31SChristoph Hellwig vip->vii_cutime = fs32_to_cpu(sbi, dip->vdi_cutime); 922f137e31SChristoph Hellwig vip->vii_orgtype = dip->vdi_orgtype; 931da177e4SLinus Torvalds 942f137e31SChristoph Hellwig vip->vii_blocks = fs32_to_cpu(sbi, dip->vdi_blocks); 952f137e31SChristoph Hellwig vip->vii_gen = fs32_to_cpu(sbi, dip->vdi_gen); 961da177e4SLinus Torvalds 972f137e31SChristoph Hellwig if (VXFS_ISDIR(vip)) 982f137e31SChristoph Hellwig vip->vii_dotdot = fs32_to_cpu(sbi, dip->vdi_dotdot); 992f137e31SChristoph Hellwig else if (!VXFS_ISREG(vip) && !VXFS_ISLNK(vip)) 1002f137e31SChristoph Hellwig vip->vii_rdev = fs32_to_cpu(sbi, dip->vdi_rdev); 1011da177e4SLinus Torvalds 1022f137e31SChristoph Hellwig /* don't endian swap the fields that differ by orgtype */ 1032f137e31SChristoph Hellwig memcpy(&vip->vii_org, &dip->vdi_org, sizeof(vip->vii_org)); 1041da177e4SLinus Torvalds 1052f137e31SChristoph Hellwig inode->i_mode = vxfs_transmod(vip); 1062f137e31SChristoph Hellwig i_uid_write(inode, (uid_t)vip->vii_uid); 1072f137e31SChristoph Hellwig i_gid_write(inode, (gid_t)vip->vii_gid); 1081da177e4SLinus Torvalds 1092f137e31SChristoph Hellwig set_nlink(inode, vip->vii_nlink); 1102f137e31SChristoph Hellwig inode->i_size = vip->vii_size; 1112f137e31SChristoph Hellwig 1122f137e31SChristoph Hellwig inode->i_atime.tv_sec = vip->vii_atime; 1132f137e31SChristoph Hellwig inode->i_ctime.tv_sec = vip->vii_ctime; 1142f137e31SChristoph Hellwig inode->i_mtime.tv_sec = vip->vii_mtime; 1152f137e31SChristoph Hellwig inode->i_atime.tv_nsec = 0; 1162f137e31SChristoph Hellwig inode->i_ctime.tv_nsec = 0; 1172f137e31SChristoph Hellwig inode->i_mtime.tv_nsec = 0; 1182f137e31SChristoph Hellwig 1192f137e31SChristoph Hellwig inode->i_blocks = vip->vii_blocks; 1202f137e31SChristoph Hellwig inode->i_generation = vip->vii_gen; 1211da177e4SLinus Torvalds } 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds /** 1242f137e31SChristoph Hellwig * vxfs_blkiget - find inode based on extent # 1252f137e31SChristoph Hellwig * @sbp: superblock of the filesystem we search in 1262f137e31SChristoph Hellwig * @extent: number of the extent to search 1272f137e31SChristoph Hellwig * @ino: inode number to search 1281da177e4SLinus Torvalds * 1291da177e4SLinus Torvalds * Description: 1302f137e31SChristoph Hellwig * vxfs_blkiget searches inode @ino in the filesystem described by 1312f137e31SChristoph Hellwig * @sbp in the extent @extent. 1322f137e31SChristoph Hellwig * Returns the matching VxFS inode on success, else a NULL pointer. 1332f137e31SChristoph Hellwig * 1342f137e31SChristoph Hellwig * NOTE: 1352f137e31SChristoph Hellwig * While __vxfs_iget uses the pagecache vxfs_blkiget uses the 1362f137e31SChristoph Hellwig * buffercache. This function should not be used outside the 1372f137e31SChristoph Hellwig * read_super() method, otherwise the data may be incoherent. 1381da177e4SLinus Torvalds */ 1392f137e31SChristoph Hellwig struct inode * 1402f137e31SChristoph Hellwig vxfs_blkiget(struct super_block *sbp, u_long extent, ino_t ino) 1411da177e4SLinus Torvalds { 1422f137e31SChristoph Hellwig struct buffer_head *bp; 1432f137e31SChristoph Hellwig struct inode *inode; 1442f137e31SChristoph Hellwig u_long block, offset; 1451da177e4SLinus Torvalds 1462f137e31SChristoph Hellwig inode = new_inode(sbp); 1472f137e31SChristoph Hellwig if (!inode) 1482f137e31SChristoph Hellwig return NULL; 1492f137e31SChristoph Hellwig inode->i_ino = get_next_ino(); 1502f137e31SChristoph Hellwig 1512f137e31SChristoph Hellwig block = extent + ((ino * VXFS_ISIZE) / sbp->s_blocksize); 1522f137e31SChristoph Hellwig offset = ((ino % (sbp->s_blocksize / VXFS_ISIZE)) * VXFS_ISIZE); 1532f137e31SChristoph Hellwig bp = sb_bread(sbp, block); 1542f137e31SChristoph Hellwig 1552f137e31SChristoph Hellwig if (bp && buffer_mapped(bp)) { 1562f137e31SChristoph Hellwig struct vxfs_inode_info *vip = VXFS_INO(inode); 1572f137e31SChristoph Hellwig struct vxfs_dinode *dip; 1582f137e31SChristoph Hellwig 1592f137e31SChristoph Hellwig dip = (struct vxfs_dinode *)(bp->b_data + offset); 1602f137e31SChristoph Hellwig dip2vip_cpy(VXFS_SBI(sbp), vip, dip); 1612f137e31SChristoph Hellwig vip->vfs_inode.i_mapping->a_ops = &vxfs_aops; 1622f137e31SChristoph Hellwig #ifdef DIAGNOSTIC 1632f137e31SChristoph Hellwig vxfs_dumpi(vip, ino); 1642f137e31SChristoph Hellwig #endif 1652f137e31SChristoph Hellwig brelse(bp); 1662f137e31SChristoph Hellwig return inode; 1671da177e4SLinus Torvalds } 1682f137e31SChristoph Hellwig 1692f137e31SChristoph Hellwig printk(KERN_WARNING "vxfs: unable to read block %ld\n", block); 1702f137e31SChristoph Hellwig brelse(bp); 1712f137e31SChristoph Hellwig iput(inode); 1722f137e31SChristoph Hellwig return NULL; 1732f137e31SChristoph Hellwig } 1742f137e31SChristoph Hellwig 1752f137e31SChristoph Hellwig /** 1762f137e31SChristoph Hellwig * __vxfs_iget - generic find inode facility 1772f137e31SChristoph Hellwig * @ilistp: inode list 1782f137e31SChristoph Hellwig * @vip: VxFS inode to fill in 1792f137e31SChristoph Hellwig * @ino: inode number 1802f137e31SChristoph Hellwig * 1812f137e31SChristoph Hellwig * Description: 1822f137e31SChristoph Hellwig * Search the for inode number @ino in the filesystem 1832f137e31SChristoph Hellwig * described by @sbp. Use the specified inode table (@ilistp). 1842f137e31SChristoph Hellwig * Returns the matching inode on success, else an error code. 1852f137e31SChristoph Hellwig */ 1862f137e31SChristoph Hellwig static int 1872f137e31SChristoph Hellwig __vxfs_iget(struct inode *ilistp, struct vxfs_inode_info *vip, ino_t ino) 1882f137e31SChristoph Hellwig { 1892f137e31SChristoph Hellwig struct page *pp; 1902f137e31SChristoph Hellwig u_long offset; 1912f137e31SChristoph Hellwig 1922f137e31SChristoph Hellwig offset = (ino % (PAGE_SIZE / VXFS_ISIZE)) * VXFS_ISIZE; 1932f137e31SChristoph Hellwig pp = vxfs_get_page(ilistp->i_mapping, ino * VXFS_ISIZE / PAGE_SIZE); 1942f137e31SChristoph Hellwig 1952f137e31SChristoph Hellwig if (!IS_ERR(pp)) { 1962f137e31SChristoph Hellwig struct vxfs_dinode *dip; 1972f137e31SChristoph Hellwig caddr_t kaddr = (char *)page_address(pp); 1982f137e31SChristoph Hellwig 1992f137e31SChristoph Hellwig dip = (struct vxfs_dinode *)(kaddr + offset); 2002f137e31SChristoph Hellwig dip2vip_cpy(VXFS_SBI(ilistp->i_sb), vip, dip); 2012f137e31SChristoph Hellwig vip->vfs_inode.i_mapping->a_ops = &vxfs_aops; 2022f137e31SChristoph Hellwig #ifdef DIAGNOSTIC 2032f137e31SChristoph Hellwig vxfs_dumpi(vip, ino); 2042f137e31SChristoph Hellwig #endif 2052f137e31SChristoph Hellwig vxfs_put_page(pp); 2062f137e31SChristoph Hellwig return 0; 2072f137e31SChristoph Hellwig } 2082f137e31SChristoph Hellwig 2092f137e31SChristoph Hellwig printk(KERN_WARNING "vxfs: error on page 0x%p for inode %ld\n", 2102f137e31SChristoph Hellwig pp, (unsigned long)ino); 2112f137e31SChristoph Hellwig return PTR_ERR(pp); 2122f137e31SChristoph Hellwig } 2132f137e31SChristoph Hellwig 2142f137e31SChristoph Hellwig /** 2152f137e31SChristoph Hellwig * vxfs_stiget - find inode using the structural inode list 2162f137e31SChristoph Hellwig * @sbp: VFS superblock 2172f137e31SChristoph Hellwig * @ino: inode # 2182f137e31SChristoph Hellwig * 2192f137e31SChristoph Hellwig * Description: 2202f137e31SChristoph Hellwig * Find inode @ino in the filesystem described by @sbp using 2212f137e31SChristoph Hellwig * the structural inode list. 2222f137e31SChristoph Hellwig * Returns the matching inode on success, else a NULL pointer. 2232f137e31SChristoph Hellwig */ 2242f137e31SChristoph Hellwig struct inode * 2252f137e31SChristoph Hellwig vxfs_stiget(struct super_block *sbp, ino_t ino) 2262f137e31SChristoph Hellwig { 2272f137e31SChristoph Hellwig struct inode *inode; 2282f137e31SChristoph Hellwig int error; 2292f137e31SChristoph Hellwig 2302f137e31SChristoph Hellwig inode = new_inode(sbp); 2312f137e31SChristoph Hellwig if (!inode) 2322f137e31SChristoph Hellwig return NULL; 2332f137e31SChristoph Hellwig inode->i_ino = get_next_ino(); 2342f137e31SChristoph Hellwig 2352f137e31SChristoph Hellwig error = __vxfs_iget(VXFS_SBI(sbp)->vsi_stilist, VXFS_INO(inode), ino); 2362f137e31SChristoph Hellwig if (error) { 2372f137e31SChristoph Hellwig iput(inode); 2382f137e31SChristoph Hellwig return NULL; 2392f137e31SChristoph Hellwig } 2402f137e31SChristoph Hellwig 2412f137e31SChristoph Hellwig return inode; 2421da177e4SLinus Torvalds } 2431da177e4SLinus Torvalds 2441da177e4SLinus Torvalds /** 245d0b07948SDavid Howells * vxfs_iget - get an inode 246d0b07948SDavid Howells * @sbp: the superblock to get the inode for 247d0b07948SDavid Howells * @ino: the number of the inode to get 2481da177e4SLinus Torvalds * 2491da177e4SLinus Torvalds * Description: 250d0b07948SDavid Howells * vxfs_read_inode creates an inode, reads the disk inode for @ino and fills 251d0b07948SDavid Howells * in all relevant fields in the new inode. 2521da177e4SLinus Torvalds */ 253d0b07948SDavid Howells struct inode * 254d0b07948SDavid Howells vxfs_iget(struct super_block *sbp, ino_t ino) 2551da177e4SLinus Torvalds { 2561da177e4SLinus Torvalds struct vxfs_inode_info *vip; 257f5e54d6eSChristoph Hellwig const struct address_space_operations *aops; 258d0b07948SDavid Howells struct inode *ip; 2592f137e31SChristoph Hellwig int error; 2601da177e4SLinus Torvalds 261d0b07948SDavid Howells ip = iget_locked(sbp, ino); 262d0b07948SDavid Howells if (!ip) 263d0b07948SDavid Howells return ERR_PTR(-ENOMEM); 264d0b07948SDavid Howells if (!(ip->i_state & I_NEW)) 265d0b07948SDavid Howells return ip; 266d0b07948SDavid Howells 2672f137e31SChristoph Hellwig vip = VXFS_INO(ip); 2682f137e31SChristoph Hellwig error = __vxfs_iget(VXFS_SBI(sbp)->vsi_ilist, vip, ino); 2692f137e31SChristoph Hellwig if (error) { 270d0b07948SDavid Howells iget_failed(ip); 2712f137e31SChristoph Hellwig return ERR_PTR(error); 272d0b07948SDavid Howells } 2731da177e4SLinus Torvalds 2741da177e4SLinus Torvalds if (VXFS_ISIMMED(vip)) 2751da177e4SLinus Torvalds aops = &vxfs_immed_aops; 2761da177e4SLinus Torvalds else 2771da177e4SLinus Torvalds aops = &vxfs_aops; 2781da177e4SLinus Torvalds 2791da177e4SLinus Torvalds if (S_ISREG(ip->i_mode)) { 280dc487002SChristoph Hellwig ip->i_fop = &generic_ro_fops; 2811da177e4SLinus Torvalds ip->i_mapping->a_ops = aops; 2821da177e4SLinus Torvalds } else if (S_ISDIR(ip->i_mode)) { 2831da177e4SLinus Torvalds ip->i_op = &vxfs_dir_inode_ops; 2841da177e4SLinus Torvalds ip->i_fop = &vxfs_dir_operations; 2851da177e4SLinus Torvalds ip->i_mapping->a_ops = aops; 2861da177e4SLinus Torvalds } else if (S_ISLNK(ip->i_mode)) { 2871da177e4SLinus Torvalds if (!VXFS_ISIMMED(vip)) { 2881da177e4SLinus Torvalds ip->i_op = &page_symlink_inode_operations; 28921fc61c7SAl Viro inode_nohighmem(ip); 2901da177e4SLinus Torvalds ip->i_mapping->a_ops = &vxfs_aops; 291a63d0ff3SDuane Griffin } else { 292df64c082SAl Viro ip->i_op = &simple_symlink_inode_operations; 293df64c082SAl Viro ip->i_link = vip->vii_immed.vi_immed; 294df64c082SAl Viro nd_terminate_link(ip->i_link, ip->i_size, 295df64c082SAl Viro sizeof(vip->vii_immed.vi_immed) - 1); 296a63d0ff3SDuane Griffin } 2971da177e4SLinus Torvalds } else 2981da177e4SLinus Torvalds init_special_inode(ip, ip->i_mode, old_decode_dev(vip->vii_rdev)); 2991da177e4SLinus Torvalds 300d0b07948SDavid Howells unlock_new_inode(ip); 301d0b07948SDavid Howells return ip; 3021da177e4SLinus Torvalds } 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds /** 305b57922d9SAl Viro * vxfs_evict_inode - remove inode from main memory 3061da177e4SLinus Torvalds * @ip: inode to discard. 3071da177e4SLinus Torvalds * 3081da177e4SLinus Torvalds * Description: 309b57922d9SAl Viro * vxfs_evict_inode() is called on the final iput and frees the private 3101da177e4SLinus Torvalds * inode area. 3111da177e4SLinus Torvalds */ 3121da177e4SLinus Torvalds void 313b57922d9SAl Viro vxfs_evict_inode(struct inode *ip) 3141da177e4SLinus Torvalds { 31591b0abe3SJohannes Weiner truncate_inode_pages_final(&ip->i_data); 316dbd5768fSJan Kara clear_inode(ip); 3171da177e4SLinus Torvalds } 318