2 * Copyright (c) 2000-2001 Christoph Hellwig.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions, and the following disclaimer,
10 * without modification.
11 * 2. The name of the author may not be used to endorse or promote products
12 * derived from this software without specific prior written permission.
14 * Alternatively, this software may be distributed under the terms of the
15 * GNU General Public License ("GPL").
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * Veritas filesystem driver - inode routines.
34 #include <linux/buffer_head.h>
35 #include <linux/pagemap.h>
36 #include <linux/kernel.h>
37 #include <linux/slab.h>
40 #include "vxfs_inode.h"
41 #include "vxfs_extern.h"
44 extern const struct address_space_operations vxfs_aops;
45 extern const struct address_space_operations vxfs_immed_aops;
47 extern const struct inode_operations vxfs_immed_symlink_iops;
49 struct kmem_cache *vxfs_inode_cachep;
54 * Dump inode contents (partially).
57 vxfs_dumpi(struct vxfs_inode_info *vip, ino_t ino)
59 printk(KERN_DEBUG "\n\n");
61 printk(KERN_DEBUG "dumping vxfs inode %ld\n", ino);
63 printk(KERN_DEBUG "dumping unknown vxfs inode\n");
65 printk(KERN_DEBUG "---------------------------\n");
66 printk(KERN_DEBUG "mode is %x\n", vip->vii_mode);
67 printk(KERN_DEBUG "nlink:%u, uid:%u, gid:%u\n",
68 vip->vii_nlink, vip->vii_uid, vip->vii_gid);
69 printk(KERN_DEBUG "size:%Lx, blocks:%u\n",
70 vip->vii_size, vip->vii_blocks);
71 printk(KERN_DEBUG "orgtype:%u\n", vip->vii_orgtype);
77 * vxfs_blkiget - find inode based on extent #
78 * @sbp: superblock of the filesystem we search in
79 * @extent: number of the extent to search
80 * @ino: inode number to search
83 * vxfs_blkiget searches inode @ino in the filesystem described by
84 * @sbp in the extent @extent.
85 * Returns the matching VxFS inode on success, else a NULL pointer.
88 * While __vxfs_iget uses the pagecache vxfs_blkiget uses the
89 * buffercache. This function should not be used outside the
90 * read_super() method, otherwise the data may be incoherent.
92 struct vxfs_inode_info *
93 vxfs_blkiget(struct super_block *sbp, u_long extent, ino_t ino)
95 struct buffer_head *bp;
98 block = extent + ((ino * VXFS_ISIZE) / sbp->s_blocksize);
99 offset = ((ino % (sbp->s_blocksize / VXFS_ISIZE)) * VXFS_ISIZE);
100 bp = sb_bread(sbp, block);
102 if (bp && buffer_mapped(bp)) {
103 struct vxfs_inode_info *vip;
104 struct vxfs_dinode *dip;
106 if (!(vip = kmem_cache_alloc(vxfs_inode_cachep, GFP_KERNEL)))
108 dip = (struct vxfs_dinode *)(bp->b_data + offset);
109 memcpy(vip, dip, sizeof(*vip));
111 vxfs_dumpi(vip, ino);
118 printk(KERN_WARNING "vxfs: unable to read block %ld\n", block);
124 * __vxfs_iget - generic find inode facility
125 * @sbp: VFS superblock
127 * @ilistp: inode list
130 * Search the for inode number @ino in the filesystem
131 * described by @sbp. Use the specified inode table (@ilistp).
132 * Returns the matching VxFS inode on success, else an error code.
134 static struct vxfs_inode_info *
135 __vxfs_iget(ino_t ino, struct inode *ilistp)
140 offset = (ino % (PAGE_SIZE / VXFS_ISIZE)) * VXFS_ISIZE;
141 pp = vxfs_get_page(ilistp->i_mapping, ino * VXFS_ISIZE / PAGE_SIZE);
144 struct vxfs_inode_info *vip;
145 struct vxfs_dinode *dip;
146 caddr_t kaddr = (char *)page_address(pp);
148 if (!(vip = kmem_cache_alloc(vxfs_inode_cachep, GFP_KERNEL)))
150 dip = (struct vxfs_dinode *)(kaddr + offset);
151 memcpy(vip, dip, sizeof(*vip));
153 vxfs_dumpi(vip, ino);
159 printk(KERN_WARNING "vxfs: error on page %p\n", pp);
163 printk(KERN_WARNING "vxfs: unable to read inode %ld\n", (unsigned long)ino);
165 return ERR_PTR(-ENOMEM);
169 * vxfs_stiget - find inode using the structural inode list
170 * @sbp: VFS superblock
174 * Find inode @ino in the filesystem described by @sbp using
175 * the structural inode list.
176 * Returns the matching VxFS inode on success, else a NULL pointer.
178 struct vxfs_inode_info *
179 vxfs_stiget(struct super_block *sbp, ino_t ino)
181 struct vxfs_inode_info *vip;
183 vip = __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_stilist);
184 return IS_ERR(vip) ? NULL : vip;
188 * vxfs_transmod - mode for a VxFS inode
192 * vxfs_transmod returns a Linux mode_t for a given
193 * VxFS inode structure.
195 static __inline__ mode_t
196 vxfs_transmod(struct vxfs_inode_info *vip)
198 mode_t ret = vip->vii_mode & ~VXFS_TYPE_MASK;
200 if (VXFS_ISFIFO(vip))
219 * vxfs_iinit- helper to fill inode fields
224 * vxfs_instino is a helper function to fill in all relevant
225 * fields in @ip from @vip.
228 vxfs_iinit(struct inode *ip, struct vxfs_inode_info *vip)
231 ip->i_mode = vxfs_transmod(vip);
232 ip->i_uid = (uid_t)vip->vii_uid;
233 ip->i_gid = (gid_t)vip->vii_gid;
235 ip->i_nlink = vip->vii_nlink;
236 ip->i_size = vip->vii_size;
238 ip->i_atime.tv_sec = vip->vii_atime;
239 ip->i_ctime.tv_sec = vip->vii_ctime;
240 ip->i_mtime.tv_sec = vip->vii_mtime;
241 ip->i_atime.tv_nsec = 0;
242 ip->i_ctime.tv_nsec = 0;
243 ip->i_mtime.tv_nsec = 0;
245 ip->i_blocks = vip->vii_blocks;
246 ip->i_generation = vip->vii_gen;
253 * vxfs_get_fake_inode - get fake inode structure
254 * @sbp: filesystem superblock
258 * vxfs_fake_inode gets a fake inode (not in the inode hash) for a
259 * superblock, vxfs_inode pair.
260 * Returns the filled VFS inode.
263 vxfs_get_fake_inode(struct super_block *sbp, struct vxfs_inode_info *vip)
265 struct inode *ip = NULL;
267 if ((ip = new_inode(sbp))) {
269 ip->i_mapping->a_ops = &vxfs_aops;
275 * vxfs_put_fake_inode - free faked inode
279 * vxfs_put_fake_inode frees all data asssociated with @ip.
282 vxfs_put_fake_inode(struct inode *ip)
288 * vxfs_iget - get an inode
289 * @sbp: the superblock to get the inode for
290 * @ino: the number of the inode to get
293 * vxfs_read_inode creates an inode, reads the disk inode for @ino and fills
294 * in all relevant fields in the new inode.
297 vxfs_iget(struct super_block *sbp, ino_t ino)
299 struct vxfs_inode_info *vip;
300 const struct address_space_operations *aops;
303 ip = iget_locked(sbp, ino);
305 return ERR_PTR(-ENOMEM);
306 if (!(ip->i_state & I_NEW))
309 vip = __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_ilist);
312 return ERR_CAST(vip);
317 if (VXFS_ISIMMED(vip))
318 aops = &vxfs_immed_aops;
322 if (S_ISREG(ip->i_mode)) {
323 ip->i_fop = &generic_ro_fops;
324 ip->i_mapping->a_ops = aops;
325 } else if (S_ISDIR(ip->i_mode)) {
326 ip->i_op = &vxfs_dir_inode_ops;
327 ip->i_fop = &vxfs_dir_operations;
328 ip->i_mapping->a_ops = aops;
329 } else if (S_ISLNK(ip->i_mode)) {
330 if (!VXFS_ISIMMED(vip)) {
331 ip->i_op = &page_symlink_inode_operations;
332 ip->i_mapping->a_ops = &vxfs_aops;
334 ip->i_op = &vxfs_immed_symlink_iops;
336 init_special_inode(ip, ip->i_mode, old_decode_dev(vip->vii_rdev));
338 unlock_new_inode(ip);
343 * vxfs_clear_inode - remove inode from main memory
344 * @ip: inode to discard.
347 * vxfs_clear_inode() is called on the final iput and frees the private
351 vxfs_clear_inode(struct inode *ip)
353 kmem_cache_free(vxfs_inode_cachep, ip->i_private);