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/affs/inode.c | 411 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 411 insertions(+) create mode 100644 fs/affs/inode.c (limited to 'fs/affs/inode.c') diff --git a/fs/affs/inode.c b/fs/affs/inode.c new file mode 100644 index 000000000000..7aa6f2004536 --- /dev/null +++ b/fs/affs/inode.c @@ -0,0 +1,411 @@ +/* + * linux/fs/affs/inode.c + * + * (c) 1996 Hans-Joachim Widmaier - Rewritten + * + * (C) 1993 Ray Burr - Modified for Amiga FFS filesystem. + * + * (C) 1992 Eric Youngdale Modified for ISO9660 filesystem. + * + * (C) 1991 Linus Torvalds - minix filesystem + */ + +#include "affs.h" + +extern struct inode_operations affs_symlink_inode_operations; +extern struct timezone sys_tz; + +void +affs_read_inode(struct inode *inode) +{ + struct super_block *sb = inode->i_sb; + struct affs_sb_info *sbi = AFFS_SB(sb); + struct buffer_head *bh; + struct affs_head *head; + struct affs_tail *tail; + u32 block; + u32 size; + u32 prot; + u16 id; + + pr_debug("AFFS: read_inode(%lu)\n",inode->i_ino); + + block = inode->i_ino; + bh = affs_bread(sb, block); + if (!bh) { + affs_warning(sb, "read_inode", "Cannot read block %d", block); + goto bad_inode; + } + if (affs_checksum_block(sb, bh) || be32_to_cpu(AFFS_HEAD(bh)->ptype) != T_SHORT) { + affs_warning(sb,"read_inode", + "Checksum or type (ptype=%d) error on inode %d", + AFFS_HEAD(bh)->ptype, block); + goto bad_inode; + } + + head = AFFS_HEAD(bh); + tail = AFFS_TAIL(sb, bh); + prot = be32_to_cpu(tail->protect); + + inode->i_size = 0; + inode->i_nlink = 1; + inode->i_mode = 0; + AFFS_I(inode)->i_extcnt = 1; + AFFS_I(inode)->i_ext_last = ~1; + AFFS_I(inode)->i_protect = prot; + AFFS_I(inode)->i_opencnt = 0; + AFFS_I(inode)->i_blkcnt = 0; + AFFS_I(inode)->i_lc = NULL; + AFFS_I(inode)->i_lc_size = 0; + AFFS_I(inode)->i_lc_shift = 0; + AFFS_I(inode)->i_lc_mask = 0; + AFFS_I(inode)->i_ac = NULL; + AFFS_I(inode)->i_ext_bh = NULL; + AFFS_I(inode)->mmu_private = 0; + AFFS_I(inode)->i_lastalloc = 0; + AFFS_I(inode)->i_pa_cnt = 0; + + if (sbi->s_flags & SF_SETMODE) + inode->i_mode = sbi->s_mode; + else + inode->i_mode = prot_to_mode(prot); + + id = be16_to_cpu(tail->uid); + if (id == 0 || sbi->s_flags & SF_SETUID) + inode->i_uid = sbi->s_uid; + else if (id == 0xFFFF && sbi->s_flags & SF_MUFS) + inode->i_uid = 0; + else + inode->i_uid = id; + + id = be16_to_cpu(tail->gid); + if (id == 0 || sbi->s_flags & SF_SETGID) + inode->i_gid = sbi->s_gid; + else if (id == 0xFFFF && sbi->s_flags & SF_MUFS) + inode->i_gid = 0; + else + inode->i_gid = id; + + switch (be32_to_cpu(tail->stype)) { + case ST_ROOT: + inode->i_uid = sbi->s_uid; + inode->i_gid = sbi->s_gid; + /* fall through */ + case ST_USERDIR: + if (be32_to_cpu(tail->stype) == ST_USERDIR || + sbi->s_flags & SF_SETMODE) { + if (inode->i_mode & S_IRUSR) + inode->i_mode |= S_IXUSR; + if (inode->i_mode & S_IRGRP) + inode->i_mode |= S_IXGRP; + if (inode->i_mode & S_IROTH) + inode->i_mode |= S_IXOTH; + inode->i_mode |= S_IFDIR; + } else + inode->i_mode = S_IRUGO | S_IXUGO | S_IWUSR | S_IFDIR; + if (tail->link_chain) + inode->i_nlink = 2; + /* Maybe it should be controlled by mount parameter? */ + //inode->i_mode |= S_ISVTX; + inode->i_op = &affs_dir_inode_operations; + inode->i_fop = &affs_dir_operations; + break; + case ST_LINKDIR: +#if 0 + affs_warning(sb, "read_inode", "inode is LINKDIR"); + goto bad_inode; +#else + inode->i_mode |= S_IFDIR; + inode->i_op = NULL; + inode->i_fop = NULL; + break; +#endif + case ST_LINKFILE: + affs_warning(sb, "read_inode", "inode is LINKFILE"); + goto bad_inode; + case ST_FILE: + size = be32_to_cpu(tail->size); + inode->i_mode |= S_IFREG; + AFFS_I(inode)->mmu_private = inode->i_size = size; + if (inode->i_size) { + AFFS_I(inode)->i_blkcnt = (size - 1) / + sbi->s_data_blksize + 1; + AFFS_I(inode)->i_extcnt = (AFFS_I(inode)->i_blkcnt - 1) / + sbi->s_hashsize + 1; + } + if (tail->link_chain) + inode->i_nlink = 2; + inode->i_mapping->a_ops = (sbi->s_flags & SF_OFS) ? &affs_aops_ofs : &affs_aops; + inode->i_op = &affs_file_inode_operations; + inode->i_fop = &affs_file_operations; + break; + case ST_SOFTLINK: + inode->i_mode |= S_IFLNK; + inode->i_op = &affs_symlink_inode_operations; + inode->i_data.a_ops = &affs_symlink_aops; + break; + } + + inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec + = (be32_to_cpu(tail->change.days) * (24 * 60 * 60) + + be32_to_cpu(tail->change.mins) * 60 + + be32_to_cpu(tail->change.ticks) / 50 + + ((8 * 365 + 2) * 24 * 60 * 60)) + + sys_tz.tz_minuteswest * 60; + inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0; + affs_brelse(bh); + return; + +bad_inode: + make_bad_inode(inode); + affs_brelse(bh); + return; +} + +int +affs_write_inode(struct inode *inode, int unused) +{ + struct super_block *sb = inode->i_sb; + struct buffer_head *bh; + struct affs_tail *tail; + uid_t uid; + gid_t gid; + + pr_debug("AFFS: write_inode(%lu)\n",inode->i_ino); + + if (!inode->i_nlink) + // possibly free block + return 0; + bh = affs_bread(sb, inode->i_ino); + if (!bh) { + affs_error(sb,"write_inode","Cannot read block %lu",inode->i_ino); + return -EIO; + } + tail = AFFS_TAIL(sb, bh); + if (tail->stype == cpu_to_be32(ST_ROOT)) { + secs_to_datestamp(inode->i_mtime.tv_sec,&AFFS_ROOT_TAIL(sb, bh)->root_change); + } else { + tail->protect = cpu_to_be32(AFFS_I(inode)->i_protect); + tail->size = cpu_to_be32(inode->i_size); + secs_to_datestamp(inode->i_mtime.tv_sec,&tail->change); + if (!(inode->i_ino == AFFS_SB(sb)->s_root_block)) { + uid = inode->i_uid; + gid = inode->i_gid; + if (AFFS_SB(sb)->s_flags & SF_MUFS) { + if (inode->i_uid == 0 || inode->i_uid == 0xFFFF) + uid = inode->i_uid ^ ~0; + if (inode->i_gid == 0 || inode->i_gid == 0xFFFF) + gid = inode->i_gid ^ ~0; + } + if (!(AFFS_SB(sb)->s_flags & SF_SETUID)) + tail->uid = cpu_to_be16(uid); + if (!(AFFS_SB(sb)->s_flags & SF_SETGID)) + tail->gid = cpu_to_be16(gid); + } + } + affs_fix_checksum(sb, bh); + mark_buffer_dirty_inode(bh, inode); + affs_brelse(bh); + affs_free_prealloc(inode); + return 0; +} + +int +affs_notify_change(struct dentry *dentry, struct iattr *attr) +{ + struct inode *inode = dentry->d_inode; + int error; + + pr_debug("AFFS: notify_change(%lu,0x%x)\n",inode->i_ino,attr->ia_valid); + + error = inode_change_ok(inode,attr); + if (error) + goto out; + + if (((attr->ia_valid & ATTR_UID) && (AFFS_SB(inode->i_sb)->s_flags & SF_SETUID)) || + ((attr->ia_valid & ATTR_GID) && (AFFS_SB(inode->i_sb)->s_flags & SF_SETGID)) || + ((attr->ia_valid & ATTR_MODE) && + (AFFS_SB(inode->i_sb)->s_flags & (SF_SETMODE | SF_IMMUTABLE)))) { + if (!(AFFS_SB(inode->i_sb)->s_flags & SF_QUIET)) + error = -EPERM; + goto out; + } + + error = inode_setattr(inode, attr); + if (!error && (attr->ia_valid & ATTR_MODE)) + mode_to_prot(inode); +out: + return error; +} + +void +affs_put_inode(struct inode *inode) +{ + pr_debug("AFFS: put_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink); + affs_free_prealloc(inode); + if (atomic_read(&inode->i_count) == 1) { + down(&inode->i_sem); + if (inode->i_size != AFFS_I(inode)->mmu_private) + affs_truncate(inode); + up(&inode->i_sem); + } +} + +void +affs_delete_inode(struct inode *inode) +{ + pr_debug("AFFS: delete_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink); + inode->i_size = 0; + if (S_ISREG(inode->i_mode)) + affs_truncate(inode); + clear_inode(inode); + affs_free_block(inode->i_sb, inode->i_ino); +} + +void +affs_clear_inode(struct inode *inode) +{ + unsigned long cache_page = (unsigned long) AFFS_I(inode)->i_lc; + + pr_debug("AFFS: clear_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink); + if (cache_page) { + pr_debug("AFFS: freeing ext cache\n"); + AFFS_I(inode)->i_lc = NULL; + AFFS_I(inode)->i_ac = NULL; + free_page(cache_page); + } + affs_brelse(AFFS_I(inode)->i_ext_bh); + AFFS_I(inode)->i_ext_last = ~1; + AFFS_I(inode)->i_ext_bh = NULL; +} + +struct inode * +affs_new_inode(struct inode *dir) +{ + struct super_block *sb = dir->i_sb; + struct inode *inode; + u32 block; + struct buffer_head *bh; + + if (!(inode = new_inode(sb))) + goto err_inode; + + if (!(block = affs_alloc_block(dir, dir->i_ino))) + goto err_block; + + bh = affs_getzeroblk(sb, block); + if (!bh) + goto err_bh; + mark_buffer_dirty_inode(bh, inode); + affs_brelse(bh); + + inode->i_uid = current->fsuid; + inode->i_gid = current->fsgid; + inode->i_ino = block; + inode->i_nlink = 1; + inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC; + AFFS_I(inode)->i_opencnt = 0; + AFFS_I(inode)->i_blkcnt = 0; + AFFS_I(inode)->i_lc = NULL; + AFFS_I(inode)->i_lc_size = 0; + AFFS_I(inode)->i_lc_shift = 0; + AFFS_I(inode)->i_lc_mask = 0; + AFFS_I(inode)->i_ac = NULL; + AFFS_I(inode)->i_ext_bh = NULL; + AFFS_I(inode)->mmu_private = 0; + AFFS_I(inode)->i_protect = 0; + AFFS_I(inode)->i_lastalloc = 0; + AFFS_I(inode)->i_pa_cnt = 0; + AFFS_I(inode)->i_extcnt = 1; + AFFS_I(inode)->i_ext_last = ~1; + + insert_inode_hash(inode); + + return inode; + +err_bh: + affs_free_block(sb, block); +err_block: + iput(inode); +err_inode: + return NULL; +} + +/* + * Add an entry to a directory. Create the header block + * and insert it into the hash table. + */ + +int +affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type) +{ + struct super_block *sb = dir->i_sb; + struct buffer_head *inode_bh = NULL; + struct buffer_head *bh = NULL; + u32 block = 0; + int retval; + + pr_debug("AFFS: add_entry(dir=%u, inode=%u, \"%*s\", type=%d)\n", (u32)dir->i_ino, + (u32)inode->i_ino, (int)dentry->d_name.len, dentry->d_name.name, type); + + retval = -EIO; + bh = affs_bread(sb, inode->i_ino); + if (!bh) + goto done; + + affs_lock_link(inode); + switch (type) { + case ST_LINKFILE: + case ST_LINKDIR: + inode_bh = bh; + retval = -ENOSPC; + block = affs_alloc_block(dir, dir->i_ino); + if (!block) + goto err; + retval = -EIO; + bh = affs_getzeroblk(sb, block); + if (!bh) + goto err; + break; + default: + break; + } + + AFFS_HEAD(bh)->ptype = cpu_to_be32(T_SHORT); + AFFS_HEAD(bh)->key = cpu_to_be32(bh->b_blocknr); + affs_copy_name(AFFS_TAIL(sb, bh)->name, dentry); + AFFS_TAIL(sb, bh)->stype = cpu_to_be32(type); + AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino); + + if (inode_bh) { + __be32 chain; + chain = AFFS_TAIL(sb, inode_bh)->link_chain; + AFFS_TAIL(sb, bh)->original = cpu_to_be32(inode->i_ino); + AFFS_TAIL(sb, bh)->link_chain = chain; + AFFS_TAIL(sb, inode_bh)->link_chain = cpu_to_be32(block); + affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain)); + mark_buffer_dirty_inode(inode_bh, inode); + inode->i_nlink = 2; + atomic_inc(&inode->i_count); + } + affs_fix_checksum(sb, bh); + mark_buffer_dirty_inode(bh, inode); + dentry->d_fsdata = (void *)(long)bh->b_blocknr; + + affs_lock_dir(dir); + retval = affs_insert_hash(dir, bh); + mark_buffer_dirty_inode(bh, inode); + affs_unlock_dir(dir); + affs_unlock_link(inode); + + d_instantiate(dentry, inode); +done: + affs_brelse(inode_bh); + affs_brelse(bh); + return retval; +err: + if (block) + affs_free_block(sb, block); + affs_unlock_link(inode); + goto done; +} -- cgit v1.2.3