From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- fs/freevxfs/vxfs_inode.c | 351 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 351 insertions(+) create mode 100644 fs/freevxfs/vxfs_inode.c (limited to 'fs/freevxfs/vxfs_inode.c') diff --git a/fs/freevxfs/vxfs_inode.c b/fs/freevxfs/vxfs_inode.c new file mode 100644 index 0000000..9672d2f --- /dev/null +++ b/fs/freevxfs/vxfs_inode.c @@ -0,0 +1,351 @@ +/* + * Copyright (c) 2000-2001 Christoph Hellwig. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL"). + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * Veritas filesystem driver - inode routines. + */ +#include +#include +#include +#include +#include + +#include "vxfs.h" +#include "vxfs_inode.h" +#include "vxfs_extern.h" + + +extern struct address_space_operations vxfs_aops; +extern struct address_space_operations vxfs_immed_aops; + +extern struct inode_operations vxfs_immed_symlink_iops; + +static struct file_operations vxfs_file_operations = { + .open = generic_file_open, + .llseek = generic_file_llseek, + .read = generic_file_read, + .mmap = generic_file_mmap, + .sendfile = generic_file_sendfile, +}; + + +kmem_cache_t *vxfs_inode_cachep; + + +#ifdef DIAGNOSTIC +/* + * Dump inode contents (partially). + */ +void +vxfs_dumpi(struct vxfs_inode_info *vip, ino_t ino) +{ + printk(KERN_DEBUG "\n\n"); + if (ino) + printk(KERN_DEBUG "dumping vxfs inode %ld\n", ino); + else + printk(KERN_DEBUG "dumping unknown vxfs inode\n"); + + printk(KERN_DEBUG "---------------------------\n"); + printk(KERN_DEBUG "mode is %x\n", vip->vii_mode); + printk(KERN_DEBUG "nlink:%u, uid:%u, gid:%u\n", + vip->vii_nlink, vip->vii_uid, vip->vii_gid); + printk(KERN_DEBUG "size:%Lx, blocks:%u\n", + vip->vii_size, vip->vii_blocks); + printk(KERN_DEBUG "orgtype:%u\n", vip->vii_orgtype); +} +#endif + + +/** + * vxfs_blkiget - find inode based on extent # + * @sbp: superblock of the filesystem we search in + * @extent: number of the extent to search + * @ino: inode number to search + * + * Description: + * vxfs_blkiget searches inode @ino in the filesystem described by + * @sbp in the extent @extent. + * Returns the matching VxFS inode on success, else a NULL pointer. + * + * NOTE: + * While __vxfs_iget uses the pagecache vxfs_blkiget uses the + * buffercache. This function should not be used outside the + * read_super() method, otherwise the data may be incoherent. + */ +struct vxfs_inode_info * +vxfs_blkiget(struct super_block *sbp, u_long extent, ino_t ino) +{ + struct buffer_head *bp; + u_long block, offset; + + block = extent + ((ino * VXFS_ISIZE) / sbp->s_blocksize); + offset = ((ino % (sbp->s_blocksize / VXFS_ISIZE)) * VXFS_ISIZE); + bp = sb_bread(sbp, block); + + if (buffer_mapped(bp)) { + struct vxfs_inode_info *vip; + struct vxfs_dinode *dip; + + if (!(vip = kmem_cache_alloc(vxfs_inode_cachep, SLAB_KERNEL))) + goto fail; + dip = (struct vxfs_dinode *)(bp->b_data + offset); + memcpy(vip, dip, sizeof(*vip)); +#ifdef DIAGNOSTIC + vxfs_dumpi(vip, ino); +#endif + brelse(bp); + return (vip); + } + +fail: + printk(KERN_WARNING "vxfs: unable to read block %ld\n", block); + brelse(bp); + return NULL; +} + +/** + * __vxfs_iget - generic find inode facility + * @sbp: VFS superblock + * @ino: inode number + * @ilistp: inode list + * + * Description: + * Search the for inode number @ino in the filesystem + * described by @sbp. Use the specified inode table (@ilistp). + * Returns the matching VxFS inode on success, else a NULL pointer. + */ +static struct vxfs_inode_info * +__vxfs_iget(ino_t ino, struct inode *ilistp) +{ + struct page *pp; + u_long offset; + + offset = (ino % (PAGE_SIZE / VXFS_ISIZE)) * VXFS_ISIZE; + pp = vxfs_get_page(ilistp->i_mapping, ino * VXFS_ISIZE / PAGE_SIZE); + + if (!IS_ERR(pp)) { + struct vxfs_inode_info *vip; + struct vxfs_dinode *dip; + caddr_t kaddr = (char *)page_address(pp); + + if (!(vip = kmem_cache_alloc(vxfs_inode_cachep, SLAB_KERNEL))) + goto fail; + dip = (struct vxfs_dinode *)(kaddr + offset); + memcpy(vip, dip, sizeof(*vip)); +#ifdef DIAGNOSTIC + vxfs_dumpi(vip, ino); +#endif + vxfs_put_page(pp); + return (vip); + } + + printk(KERN_WARNING "vxfs: error on page %p\n", pp); + return NULL; + +fail: + printk(KERN_WARNING "vxfs: unable to read inode %ld\n", (unsigned long)ino); + vxfs_put_page(pp); + return NULL; +} + +/** + * vxfs_stiget - find inode using the structural inode list + * @sbp: VFS superblock + * @ino: inode # + * + * Description: + * Find inode @ino in the filesystem described by @sbp using + * the structural inode list. + * Returns the matching VxFS inode on success, else a NULL pointer. + */ +struct vxfs_inode_info * +vxfs_stiget(struct super_block *sbp, ino_t ino) +{ + return __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_stilist); +} + +/** + * vxfs_transmod - mode for a VxFS inode + * @vip: VxFS inode + * + * Description: + * vxfs_transmod returns a Linux mode_t for a given + * VxFS inode structure. + */ +static __inline__ mode_t +vxfs_transmod(struct vxfs_inode_info *vip) +{ + mode_t ret = vip->vii_mode & ~VXFS_TYPE_MASK; + + if (VXFS_ISFIFO(vip)) + ret |= S_IFIFO; + if (VXFS_ISCHR(vip)) + ret |= S_IFCHR; + if (VXFS_ISDIR(vip)) + ret |= S_IFDIR; + if (VXFS_ISBLK(vip)) + ret |= S_IFBLK; + if (VXFS_ISLNK(vip)) + ret |= S_IFLNK; + if (VXFS_ISREG(vip)) + ret |= S_IFREG; + if (VXFS_ISSOC(vip)) + ret |= S_IFSOCK; + + return (ret); +} + +/** + * vxfs_iinit- helper to fill inode fields + * @ip: VFS inode + * @vip: VxFS inode + * + * Description: + * vxfs_instino is a helper function to fill in all relevant + * fields in @ip from @vip. + */ +static void +vxfs_iinit(struct inode *ip, struct vxfs_inode_info *vip) +{ + + ip->i_mode = vxfs_transmod(vip); + ip->i_uid = (uid_t)vip->vii_uid; + ip->i_gid = (gid_t)vip->vii_gid; + + ip->i_nlink = vip->vii_nlink; + ip->i_size = vip->vii_size; + + ip->i_atime.tv_sec = vip->vii_atime; + ip->i_ctime.tv_sec = vip->vii_ctime; + ip->i_mtime.tv_sec = vip->vii_mtime; + ip->i_atime.tv_nsec = 0; + ip->i_ctime.tv_nsec = 0; + ip->i_mtime.tv_nsec = 0; + + ip->i_blksize = PAGE_SIZE; + ip->i_blocks = vip->vii_blocks; + ip->i_generation = vip->vii_gen; + + ip->u.generic_ip = (void *)vip; + +} + +/** + * vxfs_get_fake_inode - get fake inode structure + * @sbp: filesystem superblock + * @vip: fspriv inode + * + * Description: + * vxfs_fake_inode gets a fake inode (not in the inode hash) for a + * superblock, vxfs_inode pair. + * Returns the filled VFS inode. + */ +struct inode * +vxfs_get_fake_inode(struct super_block *sbp, struct vxfs_inode_info *vip) +{ + struct inode *ip = NULL; + + if ((ip = new_inode(sbp))) { + vxfs_iinit(ip, vip); + ip->i_mapping->a_ops = &vxfs_aops; + } + return (ip); +} + +/** + * vxfs_put_fake_inode - free faked inode + * *ip: VFS inode + * + * Description: + * vxfs_put_fake_inode frees all data asssociated with @ip. + */ +void +vxfs_put_fake_inode(struct inode *ip) +{ + iput(ip); +} + +/** + * vxfs_read_inode - fill in inode information + * @ip: inode pointer to fill + * + * Description: + * vxfs_read_inode reads the disk inode for @ip and fills + * in all relevant fields in @ip. + */ +void +vxfs_read_inode(struct inode *ip) +{ + struct super_block *sbp = ip->i_sb; + struct vxfs_inode_info *vip; + struct address_space_operations *aops; + ino_t ino = ip->i_ino; + + if (!(vip = __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_ilist))) + return; + + vxfs_iinit(ip, vip); + + if (VXFS_ISIMMED(vip)) + aops = &vxfs_immed_aops; + else + aops = &vxfs_aops; + + if (S_ISREG(ip->i_mode)) { + ip->i_fop = &vxfs_file_operations; + ip->i_mapping->a_ops = aops; + } else if (S_ISDIR(ip->i_mode)) { + ip->i_op = &vxfs_dir_inode_ops; + ip->i_fop = &vxfs_dir_operations; + ip->i_mapping->a_ops = aops; + } else if (S_ISLNK(ip->i_mode)) { + if (!VXFS_ISIMMED(vip)) { + ip->i_op = &page_symlink_inode_operations; + ip->i_mapping->a_ops = &vxfs_aops; + } else + ip->i_op = &vxfs_immed_symlink_iops; + } else + init_special_inode(ip, ip->i_mode, old_decode_dev(vip->vii_rdev)); + + return; +} + +/** + * vxfs_clear_inode - remove inode from main memory + * @ip: inode to discard. + * + * Description: + * vxfs_clear_inode() is called on the final iput and frees the private + * inode area. + */ +void +vxfs_clear_inode(struct inode *ip) +{ + kmem_cache_free(vxfs_inode_cachep, ip->u.generic_ip); +} -- cgit v1.1