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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2000-2001 Christoph Hellwig.
4 * Copyright (c) 2016 Krzysztof Blaszkowski
5 */
6
7/*
8 * Veritas filesystem driver - inode routines.
9 */
10#include <linux/fs.h>
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>
16
17#include "vxfs.h"
18#include "vxfs_inode.h"
19#include "vxfs_extern.h"
20
21
22#ifdef DIAGNOSTIC
23/*
24 * Dump inode contents (partially).
25 */
26void
27vxfs_dumpi(struct vxfs_inode_info *vip, ino_t ino)
28{
29 printk(KERN_DEBUG "\n\n");
30 if (ino)
31 printk(KERN_DEBUG "dumping vxfs inode %ld\n", ino);
32 else
33 printk(KERN_DEBUG "dumping unknown vxfs inode\n");
34
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);
42}
43#endif
44
45/**
46 * vxfs_transmod - mode for a VxFS inode
47 * @vip: VxFS inode
48 *
49 * Description:
50 * vxfs_transmod returns a Linux mode_t for a given
51 * VxFS inode structure.
52 */
53static __inline__ umode_t
54vxfs_transmod(struct vxfs_inode_info *vip)
55{
56 umode_t ret = vip->vii_mode & ~VXFS_TYPE_MASK;
57
58 if (VXFS_ISFIFO(vip))
59 ret |= S_IFIFO;
60 if (VXFS_ISCHR(vip))
61 ret |= S_IFCHR;
62 if (VXFS_ISDIR(vip))
63 ret |= S_IFDIR;
64 if (VXFS_ISBLK(vip))
65 ret |= S_IFBLK;
66 if (VXFS_ISLNK(vip))
67 ret |= S_IFLNK;
68 if (VXFS_ISREG(vip))
69 ret |= S_IFREG;
70 if (VXFS_ISSOC(vip))
71 ret |= S_IFSOCK;
72
73 return (ret);
74}
75
76static inline void dip2vip_cpy(struct vxfs_sb_info *sbi,
77 struct vxfs_inode_info *vip, struct vxfs_dinode *dip)
78{
79 struct inode *inode = &vip->vfs_inode;
80
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;
93
94 vip->vii_blocks = fs32_to_cpu(sbi, dip->vdi_blocks);
95 vip->vii_gen = fs32_to_cpu(sbi, dip->vdi_gen);
96
97 if (VXFS_ISDIR(vip))
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);
101
102 /* don't endian swap the fields that differ by orgtype */
103 memcpy(&vip->vii_org, &dip->vdi_org, sizeof(vip->vii_org));
104
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);
108
109 set_nlink(inode, vip->vii_nlink);
110 inode->i_size = vip->vii_size;
111
112 inode_set_atime(inode, vip->vii_atime, 0);
113 inode_set_ctime(inode, vip->vii_ctime, 0);
114 inode_set_mtime(inode, vip->vii_mtime, 0);
115
116 inode->i_blocks = vip->vii_blocks;
117 inode->i_generation = vip->vii_gen;
118}
119
120/**
121 * vxfs_blkiget - find inode based on extent #
122 * @sbp: superblock of the filesystem we search in
123 * @extent: number of the extent to search
124 * @ino: inode number to search
125 *
126 * Description:
127 * vxfs_blkiget searches inode @ino in the filesystem described by
128 * @sbp in the extent @extent.
129 * Returns the matching VxFS inode on success, else a NULL pointer.
130 *
131 * NOTE:
132 * While __vxfs_iget uses the pagecache vxfs_blkiget uses the
133 * buffercache. This function should not be used outside the
134 * read_super() method, otherwise the data may be incoherent.
135 */
136struct inode *
137vxfs_blkiget(struct super_block *sbp, u_long extent, ino_t ino)
138{
139 struct buffer_head *bp;
140 struct inode *inode;
141 u_long block, offset;
142
143 inode = new_inode(sbp);
144 if (!inode)
145 return NULL;
146 inode->i_ino = get_next_ino();
147
148 block = extent + ((ino * VXFS_ISIZE) / sbp->s_blocksize);
149 offset = ((ino % (sbp->s_blocksize / VXFS_ISIZE)) * VXFS_ISIZE);
150 bp = sb_bread(sbp, block);
151
152 if (bp && buffer_mapped(bp)) {
153 struct vxfs_inode_info *vip = VXFS_INO(inode);
154 struct vxfs_dinode *dip;
155
156 dip = (struct vxfs_dinode *)(bp->b_data + offset);
157 dip2vip_cpy(VXFS_SBI(sbp), vip, dip);
158 vip->vfs_inode.i_mapping->a_ops = &vxfs_aops;
159#ifdef DIAGNOSTIC
160 vxfs_dumpi(vip, ino);
161#endif
162 brelse(bp);
163 return inode;
164 }
165
166 printk(KERN_WARNING "vxfs: unable to read block %ld\n", block);
167 brelse(bp);
168 iput(inode);
169 return NULL;
170}
171
172/**
173 * __vxfs_iget - generic find inode facility
174 * @ilistp: inode list
175 * @vip: VxFS inode to fill in
176 * @ino: inode number
177 *
178 * Description:
179 * Search the for inode number @ino in the filesystem
180 * described by @sbp. Use the specified inode table (@ilistp).
181 * Returns the matching inode on success, else an error code.
182 */
183static int
184__vxfs_iget(struct inode *ilistp, struct vxfs_inode_info *vip, ino_t ino)
185{
186 struct page *pp;
187 u_long offset;
188
189 offset = (ino % (PAGE_SIZE / VXFS_ISIZE)) * VXFS_ISIZE;
190 pp = vxfs_get_page(ilistp->i_mapping, ino * VXFS_ISIZE / PAGE_SIZE);
191
192 if (!IS_ERR(pp)) {
193 struct vxfs_dinode *dip;
194 caddr_t kaddr = (char *)page_address(pp);
195
196 dip = (struct vxfs_dinode *)(kaddr + offset);
197 dip2vip_cpy(VXFS_SBI(ilistp->i_sb), vip, dip);
198 vip->vfs_inode.i_mapping->a_ops = &vxfs_aops;
199#ifdef DIAGNOSTIC
200 vxfs_dumpi(vip, ino);
201#endif
202 vxfs_put_page(pp);
203 return 0;
204 }
205
206 printk(KERN_WARNING "vxfs: error on page 0x%p for inode %ld\n",
207 pp, (unsigned long)ino);
208 return PTR_ERR(pp);
209}
210
211/**
212 * vxfs_stiget - find inode using the structural inode list
213 * @sbp: VFS superblock
214 * @ino: inode #
215 *
216 * Description:
217 * Find inode @ino in the filesystem described by @sbp using
218 * the structural inode list.
219 * Returns the matching inode on success, else a NULL pointer.
220 */
221struct inode *
222vxfs_stiget(struct super_block *sbp, ino_t ino)
223{
224 struct inode *inode;
225 int error;
226
227 inode = new_inode(sbp);
228 if (!inode)
229 return NULL;
230 inode->i_ino = get_next_ino();
231
232 error = __vxfs_iget(VXFS_SBI(sbp)->vsi_stilist, VXFS_INO(inode), ino);
233 if (error) {
234 iput(inode);
235 return NULL;
236 }
237
238 return inode;
239}
240
241/**
242 * vxfs_iget - get an inode
243 * @sbp: the superblock to get the inode for
244 * @ino: the number of the inode to get
245 *
246 * Description:
247 * vxfs_read_inode creates an inode, reads the disk inode for @ino and fills
248 * in all relevant fields in the new inode.
249 */
250struct inode *
251vxfs_iget(struct super_block *sbp, ino_t ino)
252{
253 struct vxfs_inode_info *vip;
254 const struct address_space_operations *aops;
255 struct inode *ip;
256 int error;
257
258 ip = iget_locked(sbp, ino);
259 if (!ip)
260 return ERR_PTR(-ENOMEM);
261 if (!(ip->i_state & I_NEW))
262 return ip;
263
264 vip = VXFS_INO(ip);
265 error = __vxfs_iget(VXFS_SBI(sbp)->vsi_ilist, vip, ino);
266 if (error) {
267 iget_failed(ip);
268 return ERR_PTR(error);
269 }
270
271 if (VXFS_ISIMMED(vip))
272 aops = &vxfs_immed_aops;
273 else
274 aops = &vxfs_aops;
275
276 if (S_ISREG(ip->i_mode)) {
277 ip->i_fop = &generic_ro_fops;
278 ip->i_mapping->a_ops = aops;
279 } else if (S_ISDIR(ip->i_mode)) {
280 ip->i_op = &vxfs_dir_inode_ops;
281 ip->i_fop = &vxfs_dir_operations;
282 ip->i_mapping->a_ops = aops;
283 } else if (S_ISLNK(ip->i_mode)) {
284 if (!VXFS_ISIMMED(vip)) {
285 ip->i_op = &page_symlink_inode_operations;
286 inode_nohighmem(ip);
287 ip->i_mapping->a_ops = &vxfs_aops;
288 } else {
289 ip->i_op = &simple_symlink_inode_operations;
290 ip->i_link = vip->vii_immed.vi_immed;
291 nd_terminate_link(ip->i_link, ip->i_size,
292 sizeof(vip->vii_immed.vi_immed) - 1);
293 }
294 } else
295 init_special_inode(ip, ip->i_mode, old_decode_dev(vip->vii_rdev));
296
297 unlock_new_inode(ip);
298 return ip;
299}
300
301/**
302 * vxfs_evict_inode - remove inode from main memory
303 * @ip: inode to discard.
304 *
305 * Description:
306 * vxfs_evict_inode() is called on the final iput and frees the private
307 * inode area.
308 */
309void
310vxfs_evict_inode(struct inode *ip)
311{
312 truncate_inode_pages_final(&ip->i_data);
313 clear_inode(ip);
314}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2000-2001 Christoph Hellwig.
4 * Copyright (c) 2016 Krzysztof Blaszkowski
5 */
6
7/*
8 * Veritas filesystem driver - inode routines.
9 */
10#include <linux/fs.h>
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>
16
17#include "vxfs.h"
18#include "vxfs_inode.h"
19#include "vxfs_extern.h"
20
21
22#ifdef DIAGNOSTIC
23/*
24 * Dump inode contents (partially).
25 */
26void
27vxfs_dumpi(struct vxfs_inode_info *vip, ino_t ino)
28{
29 printk(KERN_DEBUG "\n\n");
30 if (ino)
31 printk(KERN_DEBUG "dumping vxfs inode %ld\n", ino);
32 else
33 printk(KERN_DEBUG "dumping unknown vxfs inode\n");
34
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);
42}
43#endif
44
45/**
46 * vxfs_transmod - mode for a VxFS inode
47 * @vip: VxFS inode
48 *
49 * Description:
50 * vxfs_transmod returns a Linux mode_t for a given
51 * VxFS inode structure.
52 */
53static __inline__ umode_t
54vxfs_transmod(struct vxfs_inode_info *vip)
55{
56 umode_t ret = vip->vii_mode & ~VXFS_TYPE_MASK;
57
58 if (VXFS_ISFIFO(vip))
59 ret |= S_IFIFO;
60 if (VXFS_ISCHR(vip))
61 ret |= S_IFCHR;
62 if (VXFS_ISDIR(vip))
63 ret |= S_IFDIR;
64 if (VXFS_ISBLK(vip))
65 ret |= S_IFBLK;
66 if (VXFS_ISLNK(vip))
67 ret |= S_IFLNK;
68 if (VXFS_ISREG(vip))
69 ret |= S_IFREG;
70 if (VXFS_ISSOC(vip))
71 ret |= S_IFSOCK;
72
73 return (ret);
74}
75
76static inline void dip2vip_cpy(struct vxfs_sb_info *sbi,
77 struct vxfs_inode_info *vip, struct vxfs_dinode *dip)
78{
79 struct inode *inode = &vip->vfs_inode;
80
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;
93
94 vip->vii_blocks = fs32_to_cpu(sbi, dip->vdi_blocks);
95 vip->vii_gen = fs32_to_cpu(sbi, dip->vdi_gen);
96
97 if (VXFS_ISDIR(vip))
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);
101
102 /* don't endian swap the fields that differ by orgtype */
103 memcpy(&vip->vii_org, &dip->vdi_org, sizeof(vip->vii_org));
104
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);
108
109 set_nlink(inode, vip->vii_nlink);
110 inode->i_size = vip->vii_size;
111
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;
118
119 inode->i_blocks = vip->vii_blocks;
120 inode->i_generation = vip->vii_gen;
121}
122
123/**
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
128 *
129 * Description:
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.
133 *
134 * NOTE:
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.
138 */
139struct inode *
140vxfs_blkiget(struct super_block *sbp, u_long extent, ino_t ino)
141{
142 struct buffer_head *bp;
143 struct inode *inode;
144 u_long block, offset;
145
146 inode = new_inode(sbp);
147 if (!inode)
148 return NULL;
149 inode->i_ino = get_next_ino();
150
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);
154
155 if (bp && buffer_mapped(bp)) {
156 struct vxfs_inode_info *vip = VXFS_INO(inode);
157 struct vxfs_dinode *dip;
158
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;
162#ifdef DIAGNOSTIC
163 vxfs_dumpi(vip, ino);
164#endif
165 brelse(bp);
166 return inode;
167 }
168
169 printk(KERN_WARNING "vxfs: unable to read block %ld\n", block);
170 brelse(bp);
171 iput(inode);
172 return NULL;
173}
174
175/**
176 * __vxfs_iget - generic find inode facility
177 * @ilistp: inode list
178 * @vip: VxFS inode to fill in
179 * @ino: inode number
180 *
181 * Description:
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.
185 */
186static int
187__vxfs_iget(struct inode *ilistp, struct vxfs_inode_info *vip, ino_t ino)
188{
189 struct page *pp;
190 u_long offset;
191
192 offset = (ino % (PAGE_SIZE / VXFS_ISIZE)) * VXFS_ISIZE;
193 pp = vxfs_get_page(ilistp->i_mapping, ino * VXFS_ISIZE / PAGE_SIZE);
194
195 if (!IS_ERR(pp)) {
196 struct vxfs_dinode *dip;
197 caddr_t kaddr = (char *)page_address(pp);
198
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;
202#ifdef DIAGNOSTIC
203 vxfs_dumpi(vip, ino);
204#endif
205 vxfs_put_page(pp);
206 return 0;
207 }
208
209 printk(KERN_WARNING "vxfs: error on page 0x%p for inode %ld\n",
210 pp, (unsigned long)ino);
211 return PTR_ERR(pp);
212}
213
214/**
215 * vxfs_stiget - find inode using the structural inode list
216 * @sbp: VFS superblock
217 * @ino: inode #
218 *
219 * Description:
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.
223 */
224struct inode *
225vxfs_stiget(struct super_block *sbp, ino_t ino)
226{
227 struct inode *inode;
228 int error;
229
230 inode = new_inode(sbp);
231 if (!inode)
232 return NULL;
233 inode->i_ino = get_next_ino();
234
235 error = __vxfs_iget(VXFS_SBI(sbp)->vsi_stilist, VXFS_INO(inode), ino);
236 if (error) {
237 iput(inode);
238 return NULL;
239 }
240
241 return inode;
242}
243
244/**
245 * vxfs_iget - get an inode
246 * @sbp: the superblock to get the inode for
247 * @ino: the number of the inode to get
248 *
249 * Description:
250 * vxfs_read_inode creates an inode, reads the disk inode for @ino and fills
251 * in all relevant fields in the new inode.
252 */
253struct inode *
254vxfs_iget(struct super_block *sbp, ino_t ino)
255{
256 struct vxfs_inode_info *vip;
257 const struct address_space_operations *aops;
258 struct inode *ip;
259 int error;
260
261 ip = iget_locked(sbp, ino);
262 if (!ip)
263 return ERR_PTR(-ENOMEM);
264 if (!(ip->i_state & I_NEW))
265 return ip;
266
267 vip = VXFS_INO(ip);
268 error = __vxfs_iget(VXFS_SBI(sbp)->vsi_ilist, vip, ino);
269 if (error) {
270 iget_failed(ip);
271 return ERR_PTR(error);
272 }
273
274 if (VXFS_ISIMMED(vip))
275 aops = &vxfs_immed_aops;
276 else
277 aops = &vxfs_aops;
278
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;
289 inode_nohighmem(ip);
290 ip->i_mapping->a_ops = &vxfs_aops;
291 } else {
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);
296 }
297 } else
298 init_special_inode(ip, ip->i_mode, old_decode_dev(vip->vii_rdev));
299
300 unlock_new_inode(ip);
301 return ip;
302}
303
304/**
305 * vxfs_evict_inode - remove inode from main memory
306 * @ip: inode to discard.
307 *
308 * Description:
309 * vxfs_evict_inode() is called on the final iput and frees the private
310 * inode area.
311 */
312void
313vxfs_evict_inode(struct inode *ip)
314{
315 truncate_inode_pages_final(&ip->i_data);
316 clear_inode(ip);
317}