1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2000-2001 Christoph Hellwig.
4 * Copyright (c) 2016 Krzysztof Blaszkowski
8 * Veritas filesystem driver - inode routines.
11 #include <linux/buffer_head.h>
12 #include <linux/pagemap.h>
13 #include <linux/kernel.h>
14 #include <linux/slab.h>
15 #include <linux/namei.h>
18 #include "vxfs_inode.h"
19 #include "vxfs_extern.h"
24 * Dump inode contents (partially).
27 vxfs_dumpi(struct vxfs_inode_info *vip, ino_t ino)
29 printk(KERN_DEBUG "\n\n");
31 printk(KERN_DEBUG "dumping vxfs inode %ld\n", ino);
33 printk(KERN_DEBUG "dumping unknown vxfs inode\n");
35 printk(KERN_DEBUG "---------------------------\n");
36 printk(KERN_DEBUG "mode is %x\n", vip->vii_mode);
37 printk(KERN_DEBUG "nlink:%u, uid:%u, gid:%u\n",
38 vip->vii_nlink, vip->vii_uid, vip->vii_gid);
39 printk(KERN_DEBUG "size:%Lx, blocks:%u\n",
40 vip->vii_size, vip->vii_blocks);
41 printk(KERN_DEBUG "orgtype:%u\n", vip->vii_orgtype);
46 * vxfs_transmod - mode for a VxFS inode
50 * vxfs_transmod returns a Linux mode_t for a given
51 * VxFS inode structure.
53 static __inline__ umode_t
54 vxfs_transmod(struct vxfs_inode_info *vip)
56 umode_t ret = vip->vii_mode & ~VXFS_TYPE_MASK;
76 static inline void dip2vip_cpy(struct vxfs_sb_info *sbi,
77 struct vxfs_inode_info *vip, struct vxfs_dinode *dip)
79 struct inode *inode = &vip->vfs_inode;
81 vip->vii_mode = fs32_to_cpu(sbi, dip->vdi_mode);
82 vip->vii_nlink = fs32_to_cpu(sbi, dip->vdi_nlink);
83 vip->vii_uid = fs32_to_cpu(sbi, dip->vdi_uid);
84 vip->vii_gid = fs32_to_cpu(sbi, dip->vdi_gid);
85 vip->vii_size = fs64_to_cpu(sbi, dip->vdi_size);
86 vip->vii_atime = fs32_to_cpu(sbi, dip->vdi_atime);
87 vip->vii_autime = fs32_to_cpu(sbi, dip->vdi_autime);
88 vip->vii_mtime = fs32_to_cpu(sbi, dip->vdi_mtime);
89 vip->vii_mutime = fs32_to_cpu(sbi, dip->vdi_mutime);
90 vip->vii_ctime = fs32_to_cpu(sbi, dip->vdi_ctime);
91 vip->vii_cutime = fs32_to_cpu(sbi, dip->vdi_cutime);
92 vip->vii_orgtype = dip->vdi_orgtype;
94 vip->vii_blocks = fs32_to_cpu(sbi, dip->vdi_blocks);
95 vip->vii_gen = fs32_to_cpu(sbi, dip->vdi_gen);
98 vip->vii_dotdot = fs32_to_cpu(sbi, dip->vdi_dotdot);
99 else if (!VXFS_ISREG(vip) && !VXFS_ISLNK(vip))
100 vip->vii_rdev = fs32_to_cpu(sbi, dip->vdi_rdev);
102 /* don't endian swap the fields that differ by orgtype */
103 memcpy(&vip->vii_org, &dip->vdi_org, sizeof(vip->vii_org));
105 inode->i_mode = vxfs_transmod(vip);
106 i_uid_write(inode, (uid_t)vip->vii_uid);
107 i_gid_write(inode, (gid_t)vip->vii_gid);
109 set_nlink(inode, vip->vii_nlink);
110 inode->i_size = vip->vii_size;
112 inode->i_atime.tv_sec = vip->vii_atime;
113 inode->i_ctime.tv_sec = vip->vii_ctime;
114 inode->i_mtime.tv_sec = vip->vii_mtime;
115 inode->i_atime.tv_nsec = 0;
116 inode->i_ctime.tv_nsec = 0;
117 inode->i_mtime.tv_nsec = 0;
119 inode->i_blocks = vip->vii_blocks;
120 inode->i_generation = vip->vii_gen;
124 * vxfs_blkiget - find inode based on extent #
125 * @sbp: superblock of the filesystem we search in
126 * @extent: number of the extent to search
127 * @ino: inode number to search
130 * vxfs_blkiget searches inode @ino in the filesystem described by
131 * @sbp in the extent @extent.
132 * Returns the matching VxFS inode on success, else a NULL pointer.
135 * While __vxfs_iget uses the pagecache vxfs_blkiget uses the
136 * buffercache. This function should not be used outside the
137 * read_super() method, otherwise the data may be incoherent.
140 vxfs_blkiget(struct super_block *sbp, u_long extent, ino_t ino)
142 struct buffer_head *bp;
144 u_long block, offset;
146 inode = new_inode(sbp);
149 inode->i_ino = get_next_ino();
151 block = extent + ((ino * VXFS_ISIZE) / sbp->s_blocksize);
152 offset = ((ino % (sbp->s_blocksize / VXFS_ISIZE)) * VXFS_ISIZE);
153 bp = sb_bread(sbp, block);
155 if (bp && buffer_mapped(bp)) {
156 struct vxfs_inode_info *vip = VXFS_INO(inode);
157 struct vxfs_dinode *dip;
159 dip = (struct vxfs_dinode *)(bp->b_data + offset);
160 dip2vip_cpy(VXFS_SBI(sbp), vip, dip);
161 vip->vfs_inode.i_mapping->a_ops = &vxfs_aops;
163 vxfs_dumpi(vip, ino);
169 printk(KERN_WARNING "vxfs: unable to read block %ld\n", block);
176 * __vxfs_iget - generic find inode facility
177 * @ilistp: inode list
178 * @vip: VxFS inode to fill in
182 * Search the for inode number @ino in the filesystem
183 * described by @sbp. Use the specified inode table (@ilistp).
184 * Returns the matching inode on success, else an error code.
187 __vxfs_iget(struct inode *ilistp, struct vxfs_inode_info *vip, ino_t ino)
192 offset = (ino % (PAGE_SIZE / VXFS_ISIZE)) * VXFS_ISIZE;
193 pp = vxfs_get_page(ilistp->i_mapping, ino * VXFS_ISIZE / PAGE_SIZE);
196 struct vxfs_dinode *dip;
197 caddr_t kaddr = (char *)page_address(pp);
199 dip = (struct vxfs_dinode *)(kaddr + offset);
200 dip2vip_cpy(VXFS_SBI(ilistp->i_sb), vip, dip);
201 vip->vfs_inode.i_mapping->a_ops = &vxfs_aops;
203 vxfs_dumpi(vip, ino);
209 printk(KERN_WARNING "vxfs: error on page 0x%p for inode %ld\n",
210 pp, (unsigned long)ino);
215 * vxfs_stiget - find inode using the structural inode list
216 * @sbp: VFS superblock
220 * Find inode @ino in the filesystem described by @sbp using
221 * the structural inode list.
222 * Returns the matching inode on success, else a NULL pointer.
225 vxfs_stiget(struct super_block *sbp, ino_t ino)
230 inode = new_inode(sbp);
233 inode->i_ino = get_next_ino();
235 error = __vxfs_iget(VXFS_SBI(sbp)->vsi_stilist, VXFS_INO(inode), ino);
245 * vxfs_iget - get an inode
246 * @sbp: the superblock to get the inode for
247 * @ino: the number of the inode to get
250 * vxfs_read_inode creates an inode, reads the disk inode for @ino and fills
251 * in all relevant fields in the new inode.
254 vxfs_iget(struct super_block *sbp, ino_t ino)
256 struct vxfs_inode_info *vip;
257 const struct address_space_operations *aops;
261 ip = iget_locked(sbp, ino);
263 return ERR_PTR(-ENOMEM);
264 if (!(ip->i_state & I_NEW))
268 error = __vxfs_iget(VXFS_SBI(sbp)->vsi_ilist, vip, ino);
271 return ERR_PTR(error);
274 if (VXFS_ISIMMED(vip))
275 aops = &vxfs_immed_aops;
279 if (S_ISREG(ip->i_mode)) {
280 ip->i_fop = &generic_ro_fops;
281 ip->i_mapping->a_ops = aops;
282 } else if (S_ISDIR(ip->i_mode)) {
283 ip->i_op = &vxfs_dir_inode_ops;
284 ip->i_fop = &vxfs_dir_operations;
285 ip->i_mapping->a_ops = aops;
286 } else if (S_ISLNK(ip->i_mode)) {
287 if (!VXFS_ISIMMED(vip)) {
288 ip->i_op = &page_symlink_inode_operations;
290 ip->i_mapping->a_ops = &vxfs_aops;
292 ip->i_op = &simple_symlink_inode_operations;
293 ip->i_link = vip->vii_immed.vi_immed;
294 nd_terminate_link(ip->i_link, ip->i_size,
295 sizeof(vip->vii_immed.vi_immed) - 1);
298 init_special_inode(ip, ip->i_mode, old_decode_dev(vip->vii_rdev));
300 unlock_new_inode(ip);
305 * vxfs_evict_inode - remove inode from main memory
306 * @ip: inode to discard.
309 * vxfs_evict_inode() is called on the final iput and frees the private
313 vxfs_evict_inode(struct inode *ip)
315 truncate_inode_pages_final(&ip->i_data);