10b1e987cSChristoph 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
vxfs_dumpi(struct vxfs_inode_info * vip,ino_t ino)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
vxfs_transmod(struct vxfs_inode_info * vip)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
dip2vip_cpy(struct vxfs_sb_info * sbi,struct vxfs_inode_info * vip,struct vxfs_dinode * dip)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;
113*529d8a29SJeff Layton inode_set_ctime(inode, vip->vii_ctime, 0);
1142f137e31SChristoph Hellwig inode->i_mtime.tv_sec = vip->vii_mtime;
1152f137e31SChristoph Hellwig inode->i_atime.tv_nsec = 0;
1162f137e31SChristoph Hellwig inode->i_mtime.tv_nsec = 0;
1172f137e31SChristoph Hellwig
1182f137e31SChristoph Hellwig inode->i_blocks = vip->vii_blocks;
1192f137e31SChristoph Hellwig inode->i_generation = vip->vii_gen;
1201da177e4SLinus Torvalds }
1211da177e4SLinus Torvalds
1221da177e4SLinus Torvalds /**
1232f137e31SChristoph Hellwig * vxfs_blkiget - find inode based on extent #
1242f137e31SChristoph Hellwig * @sbp: superblock of the filesystem we search in
1252f137e31SChristoph Hellwig * @extent: number of the extent to search
1262f137e31SChristoph Hellwig * @ino: inode number to search
1271da177e4SLinus Torvalds *
1281da177e4SLinus Torvalds * Description:
1292f137e31SChristoph Hellwig * vxfs_blkiget searches inode @ino in the filesystem described by
1302f137e31SChristoph Hellwig * @sbp in the extent @extent.
1312f137e31SChristoph Hellwig * Returns the matching VxFS inode on success, else a NULL pointer.
1322f137e31SChristoph Hellwig *
1332f137e31SChristoph Hellwig * NOTE:
1342f137e31SChristoph Hellwig * While __vxfs_iget uses the pagecache vxfs_blkiget uses the
1352f137e31SChristoph Hellwig * buffercache. This function should not be used outside the
1362f137e31SChristoph Hellwig * read_super() method, otherwise the data may be incoherent.
1371da177e4SLinus Torvalds */
1382f137e31SChristoph Hellwig struct inode *
vxfs_blkiget(struct super_block * sbp,u_long extent,ino_t ino)1392f137e31SChristoph Hellwig vxfs_blkiget(struct super_block *sbp, u_long extent, ino_t ino)
1401da177e4SLinus Torvalds {
1412f137e31SChristoph Hellwig struct buffer_head *bp;
1422f137e31SChristoph Hellwig struct inode *inode;
1432f137e31SChristoph Hellwig u_long block, offset;
1441da177e4SLinus Torvalds
1452f137e31SChristoph Hellwig inode = new_inode(sbp);
1462f137e31SChristoph Hellwig if (!inode)
1472f137e31SChristoph Hellwig return NULL;
1482f137e31SChristoph Hellwig inode->i_ino = get_next_ino();
1492f137e31SChristoph Hellwig
1502f137e31SChristoph Hellwig block = extent + ((ino * VXFS_ISIZE) / sbp->s_blocksize);
1512f137e31SChristoph Hellwig offset = ((ino % (sbp->s_blocksize / VXFS_ISIZE)) * VXFS_ISIZE);
1522f137e31SChristoph Hellwig bp = sb_bread(sbp, block);
1532f137e31SChristoph Hellwig
1542f137e31SChristoph Hellwig if (bp && buffer_mapped(bp)) {
1552f137e31SChristoph Hellwig struct vxfs_inode_info *vip = VXFS_INO(inode);
1562f137e31SChristoph Hellwig struct vxfs_dinode *dip;
1572f137e31SChristoph Hellwig
1582f137e31SChristoph Hellwig dip = (struct vxfs_dinode *)(bp->b_data + offset);
1592f137e31SChristoph Hellwig dip2vip_cpy(VXFS_SBI(sbp), vip, dip);
1602f137e31SChristoph Hellwig vip->vfs_inode.i_mapping->a_ops = &vxfs_aops;
1612f137e31SChristoph Hellwig #ifdef DIAGNOSTIC
1622f137e31SChristoph Hellwig vxfs_dumpi(vip, ino);
1632f137e31SChristoph Hellwig #endif
1642f137e31SChristoph Hellwig brelse(bp);
1652f137e31SChristoph Hellwig return inode;
1661da177e4SLinus Torvalds }
1672f137e31SChristoph Hellwig
1682f137e31SChristoph Hellwig printk(KERN_WARNING "vxfs: unable to read block %ld\n", block);
1692f137e31SChristoph Hellwig brelse(bp);
1702f137e31SChristoph Hellwig iput(inode);
1712f137e31SChristoph Hellwig return NULL;
1722f137e31SChristoph Hellwig }
1732f137e31SChristoph Hellwig
1742f137e31SChristoph Hellwig /**
1752f137e31SChristoph Hellwig * __vxfs_iget - generic find inode facility
1762f137e31SChristoph Hellwig * @ilistp: inode list
1772f137e31SChristoph Hellwig * @vip: VxFS inode to fill in
1782f137e31SChristoph Hellwig * @ino: inode number
1792f137e31SChristoph Hellwig *
1802f137e31SChristoph Hellwig * Description:
1812f137e31SChristoph Hellwig * Search the for inode number @ino in the filesystem
1822f137e31SChristoph Hellwig * described by @sbp. Use the specified inode table (@ilistp).
1832f137e31SChristoph Hellwig * Returns the matching inode on success, else an error code.
1842f137e31SChristoph Hellwig */
1852f137e31SChristoph Hellwig static int
__vxfs_iget(struct inode * ilistp,struct vxfs_inode_info * vip,ino_t ino)1862f137e31SChristoph Hellwig __vxfs_iget(struct inode *ilistp, struct vxfs_inode_info *vip, ino_t ino)
1872f137e31SChristoph Hellwig {
1882f137e31SChristoph Hellwig struct page *pp;
1892f137e31SChristoph Hellwig u_long offset;
1902f137e31SChristoph Hellwig
1912f137e31SChristoph Hellwig offset = (ino % (PAGE_SIZE / VXFS_ISIZE)) * VXFS_ISIZE;
1922f137e31SChristoph Hellwig pp = vxfs_get_page(ilistp->i_mapping, ino * VXFS_ISIZE / PAGE_SIZE);
1932f137e31SChristoph Hellwig
1942f137e31SChristoph Hellwig if (!IS_ERR(pp)) {
1952f137e31SChristoph Hellwig struct vxfs_dinode *dip;
1962f137e31SChristoph Hellwig caddr_t kaddr = (char *)page_address(pp);
1972f137e31SChristoph Hellwig
1982f137e31SChristoph Hellwig dip = (struct vxfs_dinode *)(kaddr + offset);
1992f137e31SChristoph Hellwig dip2vip_cpy(VXFS_SBI(ilistp->i_sb), vip, dip);
2002f137e31SChristoph Hellwig vip->vfs_inode.i_mapping->a_ops = &vxfs_aops;
2012f137e31SChristoph Hellwig #ifdef DIAGNOSTIC
2022f137e31SChristoph Hellwig vxfs_dumpi(vip, ino);
2032f137e31SChristoph Hellwig #endif
2042f137e31SChristoph Hellwig vxfs_put_page(pp);
2052f137e31SChristoph Hellwig return 0;
2062f137e31SChristoph Hellwig }
2072f137e31SChristoph Hellwig
2082f137e31SChristoph Hellwig printk(KERN_WARNING "vxfs: error on page 0x%p for inode %ld\n",
2092f137e31SChristoph Hellwig pp, (unsigned long)ino);
2102f137e31SChristoph Hellwig return PTR_ERR(pp);
2112f137e31SChristoph Hellwig }
2122f137e31SChristoph Hellwig
2132f137e31SChristoph Hellwig /**
2142f137e31SChristoph Hellwig * vxfs_stiget - find inode using the structural inode list
2152f137e31SChristoph Hellwig * @sbp: VFS superblock
2162f137e31SChristoph Hellwig * @ino: inode #
2172f137e31SChristoph Hellwig *
2182f137e31SChristoph Hellwig * Description:
2192f137e31SChristoph Hellwig * Find inode @ino in the filesystem described by @sbp using
2202f137e31SChristoph Hellwig * the structural inode list.
2212f137e31SChristoph Hellwig * Returns the matching inode on success, else a NULL pointer.
2222f137e31SChristoph Hellwig */
2232f137e31SChristoph Hellwig struct inode *
vxfs_stiget(struct super_block * sbp,ino_t ino)2242f137e31SChristoph Hellwig vxfs_stiget(struct super_block *sbp, ino_t ino)
2252f137e31SChristoph Hellwig {
2262f137e31SChristoph Hellwig struct inode *inode;
2272f137e31SChristoph Hellwig int error;
2282f137e31SChristoph Hellwig
2292f137e31SChristoph Hellwig inode = new_inode(sbp);
2302f137e31SChristoph Hellwig if (!inode)
2312f137e31SChristoph Hellwig return NULL;
2322f137e31SChristoph Hellwig inode->i_ino = get_next_ino();
2332f137e31SChristoph Hellwig
2342f137e31SChristoph Hellwig error = __vxfs_iget(VXFS_SBI(sbp)->vsi_stilist, VXFS_INO(inode), ino);
2352f137e31SChristoph Hellwig if (error) {
2362f137e31SChristoph Hellwig iput(inode);
2372f137e31SChristoph Hellwig return NULL;
2382f137e31SChristoph Hellwig }
2392f137e31SChristoph Hellwig
2402f137e31SChristoph Hellwig return inode;
2411da177e4SLinus Torvalds }
2421da177e4SLinus Torvalds
2431da177e4SLinus Torvalds /**
244d0b07948SDavid Howells * vxfs_iget - get an inode
245d0b07948SDavid Howells * @sbp: the superblock to get the inode for
246d0b07948SDavid Howells * @ino: the number of the inode to get
2471da177e4SLinus Torvalds *
2481da177e4SLinus Torvalds * Description:
249d0b07948SDavid Howells * vxfs_read_inode creates an inode, reads the disk inode for @ino and fills
250d0b07948SDavid Howells * in all relevant fields in the new inode.
2511da177e4SLinus Torvalds */
252d0b07948SDavid Howells struct inode *
vxfs_iget(struct super_block * sbp,ino_t ino)253d0b07948SDavid Howells vxfs_iget(struct super_block *sbp, ino_t ino)
2541da177e4SLinus Torvalds {
2551da177e4SLinus Torvalds struct vxfs_inode_info *vip;
256f5e54d6eSChristoph Hellwig const struct address_space_operations *aops;
257d0b07948SDavid Howells struct inode *ip;
2582f137e31SChristoph Hellwig int error;
2591da177e4SLinus Torvalds
260d0b07948SDavid Howells ip = iget_locked(sbp, ino);
261d0b07948SDavid Howells if (!ip)
262d0b07948SDavid Howells return ERR_PTR(-ENOMEM);
263d0b07948SDavid Howells if (!(ip->i_state & I_NEW))
264d0b07948SDavid Howells return ip;
265d0b07948SDavid Howells
2662f137e31SChristoph Hellwig vip = VXFS_INO(ip);
2672f137e31SChristoph Hellwig error = __vxfs_iget(VXFS_SBI(sbp)->vsi_ilist, vip, ino);
2682f137e31SChristoph Hellwig if (error) {
269d0b07948SDavid Howells iget_failed(ip);
2702f137e31SChristoph Hellwig return ERR_PTR(error);
271d0b07948SDavid Howells }
2721da177e4SLinus Torvalds
2731da177e4SLinus Torvalds if (VXFS_ISIMMED(vip))
2741da177e4SLinus Torvalds aops = &vxfs_immed_aops;
2751da177e4SLinus Torvalds else
2761da177e4SLinus Torvalds aops = &vxfs_aops;
2771da177e4SLinus Torvalds
2781da177e4SLinus Torvalds if (S_ISREG(ip->i_mode)) {
279dc487002SChristoph Hellwig ip->i_fop = &generic_ro_fops;
2801da177e4SLinus Torvalds ip->i_mapping->a_ops = aops;
2811da177e4SLinus Torvalds } else if (S_ISDIR(ip->i_mode)) {
2821da177e4SLinus Torvalds ip->i_op = &vxfs_dir_inode_ops;
2831da177e4SLinus Torvalds ip->i_fop = &vxfs_dir_operations;
2841da177e4SLinus Torvalds ip->i_mapping->a_ops = aops;
2851da177e4SLinus Torvalds } else if (S_ISLNK(ip->i_mode)) {
2861da177e4SLinus Torvalds if (!VXFS_ISIMMED(vip)) {
2871da177e4SLinus Torvalds ip->i_op = &page_symlink_inode_operations;
28821fc61c7SAl Viro inode_nohighmem(ip);
2891da177e4SLinus Torvalds ip->i_mapping->a_ops = &vxfs_aops;
290a63d0ff3SDuane Griffin } else {
291df64c082SAl Viro ip->i_op = &simple_symlink_inode_operations;
292df64c082SAl Viro ip->i_link = vip->vii_immed.vi_immed;
293df64c082SAl Viro nd_terminate_link(ip->i_link, ip->i_size,
294df64c082SAl Viro sizeof(vip->vii_immed.vi_immed) - 1);
295a63d0ff3SDuane Griffin }
2961da177e4SLinus Torvalds } else
2971da177e4SLinus Torvalds init_special_inode(ip, ip->i_mode, old_decode_dev(vip->vii_rdev));
2981da177e4SLinus Torvalds
299d0b07948SDavid Howells unlock_new_inode(ip);
300d0b07948SDavid Howells return ip;
3011da177e4SLinus Torvalds }
3021da177e4SLinus Torvalds
3031da177e4SLinus Torvalds /**
304b57922d9SAl Viro * vxfs_evict_inode - remove inode from main memory
3051da177e4SLinus Torvalds * @ip: inode to discard.
3061da177e4SLinus Torvalds *
3071da177e4SLinus Torvalds * Description:
308b57922d9SAl Viro * vxfs_evict_inode() is called on the final iput and frees the private
3091da177e4SLinus Torvalds * inode area.
3101da177e4SLinus Torvalds */
3111da177e4SLinus Torvalds void
vxfs_evict_inode(struct inode * ip)312b57922d9SAl Viro vxfs_evict_inode(struct inode *ip)
3131da177e4SLinus Torvalds {
31491b0abe3SJohannes Weiner truncate_inode_pages_final(&ip->i_data);
315dbd5768fSJan Kara clear_inode(ip);
3161da177e4SLinus Torvalds }
317