diff options
Diffstat (limited to 'fs/ufs/inode.c')
| -rw-r--r-- | fs/ufs/inode.c | 1237 |
1 files changed, 1237 insertions, 0 deletions
diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c new file mode 100644 index 000000000..c843ec858 --- /dev/null +++ b/fs/ufs/inode.c @@ -0,0 +1,1237 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * linux/fs/ufs/inode.c + * + * Copyright (C) 1998 + * Daniel Pirkl <daniel.pirkl@email.cz> + * Charles University, Faculty of Mathematics and Physics + * + * from + * + * linux/fs/ext2/inode.c + * + * Copyright (C) 1992, 1993, 1994, 1995 + * Remy Card (card@masi.ibp.fr) + * Laboratoire MASI - Institut Blaise Pascal + * Universite Pierre et Marie Curie (Paris VI) + * + * from + * + * linux/fs/minix/inode.c + * + * Copyright (C) 1991, 1992 Linus Torvalds + * + * Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993 + * Big-endian to little-endian byte-swapping/bitmaps by + * David S. Miller (davem@caip.rutgers.edu), 1995 + */ + +#include <linux/uaccess.h> + +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/time.h> +#include <linux/stat.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/buffer_head.h> +#include <linux/writeback.h> +#include <linux/iversion.h> + +#include "ufs_fs.h" +#include "ufs.h" +#include "swab.h" +#include "util.h" + +static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4]) +{ + struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi; + int ptrs = uspi->s_apb; + int ptrs_bits = uspi->s_apbshift; + const long direct_blocks = UFS_NDADDR, + indirect_blocks = ptrs, + double_blocks = (1 << (ptrs_bits * 2)); + int n = 0; + + + UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks); + if (i_block < direct_blocks) { + offsets[n++] = i_block; + } else if ((i_block -= direct_blocks) < indirect_blocks) { + offsets[n++] = UFS_IND_BLOCK; + offsets[n++] = i_block; + } else if ((i_block -= indirect_blocks) < double_blocks) { + offsets[n++] = UFS_DIND_BLOCK; + offsets[n++] = i_block >> ptrs_bits; + offsets[n++] = i_block & (ptrs - 1); + } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) { + offsets[n++] = UFS_TIND_BLOCK; + offsets[n++] = i_block >> (ptrs_bits * 2); + offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1); + offsets[n++] = i_block & (ptrs - 1); + } else { + ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big"); + } + return n; +} + +typedef struct { + void *p; + union { + __fs32 key32; + __fs64 key64; + }; + struct buffer_head *bh; +} Indirect; + +static inline int grow_chain32(struct ufs_inode_info *ufsi, + struct buffer_head *bh, __fs32 *v, + Indirect *from, Indirect *to) +{ + Indirect *p; + unsigned seq; + to->bh = bh; + do { + seq = read_seqbegin(&ufsi->meta_lock); + to->key32 = *(__fs32 *)(to->p = v); + for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++) + ; + } while (read_seqretry(&ufsi->meta_lock, seq)); + return (p > to); +} + +static inline int grow_chain64(struct ufs_inode_info *ufsi, + struct buffer_head *bh, __fs64 *v, + Indirect *from, Indirect *to) +{ + Indirect *p; + unsigned seq; + to->bh = bh; + do { + seq = read_seqbegin(&ufsi->meta_lock); + to->key64 = *(__fs64 *)(to->p = v); + for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++) + ; + } while (read_seqretry(&ufsi->meta_lock, seq)); + return (p > to); +} + +/* + * Returns the location of the fragment from + * the beginning of the filesystem. + */ + +static u64 ufs_frag_map(struct inode *inode, unsigned offsets[4], int depth) +{ + struct ufs_inode_info *ufsi = UFS_I(inode); + struct super_block *sb = inode->i_sb; + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift; + int shift = uspi->s_apbshift-uspi->s_fpbshift; + Indirect chain[4], *q = chain; + unsigned *p; + unsigned flags = UFS_SB(sb)->s_flags; + u64 res = 0; + + UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n", + uspi->s_fpbshift, uspi->s_apbmask, + (unsigned long long)mask); + + if (depth == 0) + goto no_block; + +again: + p = offsets; + + if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) + goto ufs2; + + if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q)) + goto changed; + if (!q->key32) + goto no_block; + while (--depth) { + __fs32 *ptr; + struct buffer_head *bh; + unsigned n = *p++; + + bh = sb_bread(sb, uspi->s_sbbase + + fs32_to_cpu(sb, q->key32) + (n>>shift)); + if (!bh) + goto no_block; + ptr = (__fs32 *)bh->b_data + (n & mask); + if (!grow_chain32(ufsi, bh, ptr, chain, ++q)) + goto changed; + if (!q->key32) + goto no_block; + } + res = fs32_to_cpu(sb, q->key32); + goto found; + +ufs2: + if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q)) + goto changed; + if (!q->key64) + goto no_block; + + while (--depth) { + __fs64 *ptr; + struct buffer_head *bh; + unsigned n = *p++; + + bh = sb_bread(sb, uspi->s_sbbase + + fs64_to_cpu(sb, q->key64) + (n>>shift)); + if (!bh) + goto no_block; + ptr = (__fs64 *)bh->b_data + (n & mask); + if (!grow_chain64(ufsi, bh, ptr, chain, ++q)) + goto changed; + if (!q->key64) + goto no_block; + } + res = fs64_to_cpu(sb, q->key64); +found: + res += uspi->s_sbbase; +no_block: + while (q > chain) { + brelse(q->bh); + q--; + } + return res; + +changed: + while (q > chain) { + brelse(q->bh); + q--; + } + goto again; +} + +/* + * Unpacking tails: we have a file with partial final block and + * we had been asked to extend it. If the fragment being written + * is within the same block, we need to extend the tail just to cover + * that fragment. Otherwise the tail is extended to full block. + * + * Note that we might need to create a _new_ tail, but that will + * be handled elsewhere; this is strictly for resizing old + * ones. + */ +static bool +ufs_extend_tail(struct inode *inode, u64 writes_to, + int *err, struct page *locked_page) +{ + struct ufs_inode_info *ufsi = UFS_I(inode); + struct super_block *sb = inode->i_sb; + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + unsigned lastfrag = ufsi->i_lastfrag; /* it's a short file, so unsigned is enough */ + unsigned block = ufs_fragstoblks(lastfrag); + unsigned new_size; + void *p; + u64 tmp; + + if (writes_to < (lastfrag | uspi->s_fpbmask)) + new_size = (writes_to & uspi->s_fpbmask) + 1; + else + new_size = uspi->s_fpb; + + p = ufs_get_direct_data_ptr(uspi, ufsi, block); + tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p), + new_size - (lastfrag & uspi->s_fpbmask), err, + locked_page); + return tmp != 0; +} + +/** + * ufs_inode_getfrag() - allocate new fragment(s) + * @inode: pointer to inode + * @index: number of block pointer within the inode's array. + * @new_fragment: number of new allocated fragment(s) + * @err: we set it if something wrong + * @new: we set it if we allocate new block + * @locked_page: for ufs_new_fragments() + */ +static u64 +ufs_inode_getfrag(struct inode *inode, unsigned index, + sector_t new_fragment, int *err, + int *new, struct page *locked_page) +{ + struct ufs_inode_info *ufsi = UFS_I(inode); + struct super_block *sb = inode->i_sb; + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + u64 tmp, goal, lastfrag; + unsigned nfrags = uspi->s_fpb; + void *p; + + /* TODO : to be done for write support + if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) + goto ufs2; + */ + + p = ufs_get_direct_data_ptr(uspi, ufsi, index); + tmp = ufs_data_ptr_to_cpu(sb, p); + if (tmp) + goto out; + + lastfrag = ufsi->i_lastfrag; + + /* will that be a new tail? */ + if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag) + nfrags = (new_fragment & uspi->s_fpbmask) + 1; + + goal = 0; + if (index) { + goal = ufs_data_ptr_to_cpu(sb, + ufs_get_direct_data_ptr(uspi, ufsi, index - 1)); + if (goal) + goal += uspi->s_fpb; + } + tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), + goal, nfrags, err, locked_page); + + if (!tmp) { + *err = -ENOSPC; + return 0; + } + + if (new) + *new = 1; + inode->i_ctime = current_time(inode); + if (IS_SYNC(inode)) + ufs_sync_inode (inode); + mark_inode_dirty(inode); +out: + return tmp + uspi->s_sbbase; + + /* This part : To be implemented .... + Required only for writing, not required for READ-ONLY. +ufs2: + + u2_block = ufs_fragstoblks(fragment); + u2_blockoff = ufs_fragnum(fragment); + p = ufsi->i_u1.u2_i_data + block; + goal = 0; + +repeat2: + tmp = fs32_to_cpu(sb, *p); + lastfrag = ufsi->i_lastfrag; + + */ +} + +/** + * ufs_inode_getblock() - allocate new block + * @inode: pointer to inode + * @ind_block: block number of the indirect block + * @index: number of pointer within the indirect block + * @new_fragment: number of new allocated fragment + * (block will hold this fragment and also uspi->s_fpb-1) + * @err: see ufs_inode_getfrag() + * @new: see ufs_inode_getfrag() + * @locked_page: see ufs_inode_getfrag() + */ +static u64 +ufs_inode_getblock(struct inode *inode, u64 ind_block, + unsigned index, sector_t new_fragment, int *err, + int *new, struct page *locked_page) +{ + struct super_block *sb = inode->i_sb; + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + int shift = uspi->s_apbshift - uspi->s_fpbshift; + u64 tmp = 0, goal; + struct buffer_head *bh; + void *p; + + if (!ind_block) + return 0; + + bh = sb_bread(sb, ind_block + (index >> shift)); + if (unlikely(!bh)) { + *err = -EIO; + return 0; + } + + index &= uspi->s_apbmask >> uspi->s_fpbshift; + if (uspi->fs_magic == UFS2_MAGIC) + p = (__fs64 *)bh->b_data + index; + else + p = (__fs32 *)bh->b_data + index; + + tmp = ufs_data_ptr_to_cpu(sb, p); + if (tmp) + goto out; + + if (index && (uspi->fs_magic == UFS2_MAGIC ? + (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) : + (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1])))) + goal = tmp + uspi->s_fpb; + else + goal = bh->b_blocknr + uspi->s_fpb; + tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, + uspi->s_fpb, err, locked_page); + if (!tmp) + goto out; + + if (new) + *new = 1; + + mark_buffer_dirty(bh); + if (IS_SYNC(inode)) + sync_dirty_buffer(bh); + inode->i_ctime = current_time(inode); + mark_inode_dirty(inode); +out: + brelse (bh); + UFSD("EXIT\n"); + if (tmp) + tmp += uspi->s_sbbase; + return tmp; +} + +/** + * ufs_getfrag_block() - `get_block_t' function, interface between UFS and + * readpage, writepage and so on + */ + +static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) +{ + struct super_block *sb = inode->i_sb; + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + int err = 0, new = 0; + unsigned offsets[4]; + int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets); + u64 phys64 = 0; + unsigned frag = fragment & uspi->s_fpbmask; + + phys64 = ufs_frag_map(inode, offsets, depth); + if (!create) + goto done; + + if (phys64) { + if (fragment >= UFS_NDIR_FRAGMENT) + goto done; + read_seqlock_excl(&UFS_I(inode)->meta_lock); + if (fragment < UFS_I(inode)->i_lastfrag) { + read_sequnlock_excl(&UFS_I(inode)->meta_lock); + goto done; + } + read_sequnlock_excl(&UFS_I(inode)->meta_lock); + } + /* This code entered only while writing ....? */ + + mutex_lock(&UFS_I(inode)->truncate_mutex); + + UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); + if (unlikely(!depth)) { + ufs_warning(sb, "ufs_get_block", "block > big"); + err = -EIO; + goto out; + } + + if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) { + unsigned lastfrag = UFS_I(inode)->i_lastfrag; + unsigned tailfrags = lastfrag & uspi->s_fpbmask; + if (tailfrags && fragment >= lastfrag) { + if (!ufs_extend_tail(inode, fragment, + &err, bh_result->b_page)) + goto out; + } + } + + if (depth == 1) { + phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, + &err, &new, bh_result->b_page); + } else { + int i; + phys64 = ufs_inode_getfrag(inode, offsets[0], fragment, + &err, NULL, NULL); + for (i = 1; i < depth - 1; i++) + phys64 = ufs_inode_getblock(inode, phys64, offsets[i], + fragment, &err, NULL, NULL); + phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1], + fragment, &err, &new, bh_result->b_page); + } +out: + if (phys64) { + phys64 += frag; + map_bh(bh_result, sb, phys64); + if (new) + set_buffer_new(bh_result); + } + mutex_unlock(&UFS_I(inode)->truncate_mutex); + return err; + +done: + if (phys64) + map_bh(bh_result, sb, phys64 + frag); + return 0; +} + +static int ufs_writepage(struct page *page, struct writeback_control *wbc) +{ + return block_write_full_page(page,ufs_getfrag_block,wbc); +} + +static int ufs_readpage(struct file *file, struct page *page) +{ + return block_read_full_page(page,ufs_getfrag_block); +} + +int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) +{ + return __block_write_begin(page, pos, len, ufs_getfrag_block); +} + +static void ufs_truncate_blocks(struct inode *); + +static void ufs_write_failed(struct address_space *mapping, loff_t to) +{ + struct inode *inode = mapping->host; + + if (to > inode->i_size) { + truncate_pagecache(inode, inode->i_size); + ufs_truncate_blocks(inode); + } +} + +static int ufs_write_begin(struct file *file, struct address_space *mapping, + loff_t pos, unsigned len, unsigned flags, + struct page **pagep, void **fsdata) +{ + int ret; + + ret = block_write_begin(mapping, pos, len, flags, pagep, + ufs_getfrag_block); + if (unlikely(ret)) + ufs_write_failed(mapping, pos + len); + + return ret; +} + +static int ufs_write_end(struct file *file, struct address_space *mapping, + loff_t pos, unsigned len, unsigned copied, + struct page *page, void *fsdata) +{ + int ret; + + ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata); + if (ret < len) + ufs_write_failed(mapping, pos + len); + return ret; +} + +static sector_t ufs_bmap(struct address_space *mapping, sector_t block) +{ + return generic_block_bmap(mapping,block,ufs_getfrag_block); +} + +const struct address_space_operations ufs_aops = { + .readpage = ufs_readpage, + .writepage = ufs_writepage, + .write_begin = ufs_write_begin, + .write_end = ufs_write_end, + .bmap = ufs_bmap +}; + +static void ufs_set_inode_ops(struct inode *inode) +{ + if (S_ISREG(inode->i_mode)) { + inode->i_op = &ufs_file_inode_operations; + inode->i_fop = &ufs_file_operations; + inode->i_mapping->a_ops = &ufs_aops; + } else if (S_ISDIR(inode->i_mode)) { + inode->i_op = &ufs_dir_inode_operations; + inode->i_fop = &ufs_dir_operations; + inode->i_mapping->a_ops = &ufs_aops; + } else if (S_ISLNK(inode->i_mode)) { + if (!inode->i_blocks) { + inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink; + inode->i_op = &simple_symlink_inode_operations; + } else { + inode->i_mapping->a_ops = &ufs_aops; + inode->i_op = &page_symlink_inode_operations; + inode_nohighmem(inode); + } + } else + init_special_inode(inode, inode->i_mode, + ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); +} + +static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) +{ + struct ufs_inode_info *ufsi = UFS_I(inode); + struct super_block *sb = inode->i_sb; + umode_t mode; + + /* + * Copy data to the in-core inode. + */ + inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); + set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink)); + if (inode->i_nlink == 0) + return -ESTALE; + + /* + * Linux now has 32-bit uid and gid, so we can support EFT. + */ + i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode)); + i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode)); + + inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); + inode->i_atime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); + inode->i_ctime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); + inode->i_mtime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); + inode->i_mtime.tv_nsec = 0; + inode->i_atime.tv_nsec = 0; + inode->i_ctime.tv_nsec = 0; + inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); + inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); + ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); + ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); + ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); + + + if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { + memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, + sizeof(ufs_inode->ui_u2.ui_addr)); + } else { + memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, + sizeof(ufs_inode->ui_u2.ui_symlink) - 1); + ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; + } + return 0; +} + +static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) +{ + struct ufs_inode_info *ufsi = UFS_I(inode); + struct super_block *sb = inode->i_sb; + umode_t mode; + + UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); + /* + * Copy data to the in-core inode. + */ + inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); + set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink)); + if (inode->i_nlink == 0) + return -ESTALE; + + /* + * Linux now has 32-bit uid and gid, so we can support EFT. + */ + i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid)); + i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid)); + + inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); + inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime); + inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime); + inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime); + inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec); + inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec); + inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec); + inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); + inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); + ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); + /* + ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); + ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); + */ + + if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { + memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, + sizeof(ufs2_inode->ui_u2.ui_addr)); + } else { + memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, + sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); + ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; + } + return 0; +} + +struct inode *ufs_iget(struct super_block *sb, unsigned long ino) +{ + struct ufs_inode_info *ufsi; + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + struct buffer_head * bh; + struct inode *inode; + int err = -EIO; + + UFSD("ENTER, ino %lu\n", ino); + + if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { + ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", + ino); + return ERR_PTR(-EIO); + } + + inode = iget_locked(sb, ino); + if (!inode) + return ERR_PTR(-ENOMEM); + if (!(inode->i_state & I_NEW)) + return inode; + + ufsi = UFS_I(inode); + + bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); + if (!bh) { + ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", + inode->i_ino); + goto bad_inode; + } + if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { + struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; + + err = ufs2_read_inode(inode, + ufs2_inode + ufs_inotofsbo(inode->i_ino)); + } else { + struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; + + err = ufs1_read_inode(inode, + ufs_inode + ufs_inotofsbo(inode->i_ino)); + } + brelse(bh); + if (err) + goto bad_inode; + + inode_inc_iversion(inode); + ufsi->i_lastfrag = + (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; + ufsi->i_dir_start_lookup = 0; + ufsi->i_osync = 0; + + ufs_set_inode_ops(inode); + + UFSD("EXIT\n"); + unlock_new_inode(inode); + return inode; + +bad_inode: + iget_failed(inode); + return ERR_PTR(err); +} + +static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) +{ + struct super_block *sb = inode->i_sb; + struct ufs_inode_info *ufsi = UFS_I(inode); + + ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); + ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); + + ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode)); + ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode)); + + ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); + ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); + ufs_inode->ui_atime.tv_usec = 0; + ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); + ufs_inode->ui_ctime.tv_usec = 0; + ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); + ufs_inode->ui_mtime.tv_usec = 0; + ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); + ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); + ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); + + if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { + ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); + ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); + } + + if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { + /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ + ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; + } else if (inode->i_blocks) { + memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, + sizeof(ufs_inode->ui_u2.ui_addr)); + } + else { + memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, + sizeof(ufs_inode->ui_u2.ui_symlink)); + } + + if (!inode->i_nlink) + memset (ufs_inode, 0, sizeof(struct ufs_inode)); +} + +static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) +{ + struct super_block *sb = inode->i_sb; + struct ufs_inode_info *ufsi = UFS_I(inode); + + UFSD("ENTER\n"); + ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); + ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); + + ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode)); + ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode)); + + ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); + ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec); + ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec); + ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec); + ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec); + ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec); + ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec); + + ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); + ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); + ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); + + if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { + /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ + ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; + } else if (inode->i_blocks) { + memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, + sizeof(ufs_inode->ui_u2.ui_addr)); + } else { + memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, + sizeof(ufs_inode->ui_u2.ui_symlink)); + } + + if (!inode->i_nlink) + memset (ufs_inode, 0, sizeof(struct ufs2_inode)); + UFSD("EXIT\n"); +} + +static int ufs_update_inode(struct inode * inode, int do_sync) +{ + struct super_block *sb = inode->i_sb; + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + struct buffer_head * bh; + + UFSD("ENTER, ino %lu\n", inode->i_ino); + + if (inode->i_ino < UFS_ROOTINO || + inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { + ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); + return -1; + } + + bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); + if (!bh) { + ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); + return -1; + } + if (uspi->fs_magic == UFS2_MAGIC) { + struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; + + ufs2_update_inode(inode, + ufs2_inode + ufs_inotofsbo(inode->i_ino)); + } else { + struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; + + ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); + } + + mark_buffer_dirty(bh); + if (do_sync) + sync_dirty_buffer(bh); + brelse (bh); + + UFSD("EXIT\n"); + return 0; +} + +int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) +{ + return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); +} + +int ufs_sync_inode (struct inode *inode) +{ + return ufs_update_inode (inode, 1); +} + +void ufs_evict_inode(struct inode * inode) +{ + int want_delete = 0; + + if (!inode->i_nlink && !is_bad_inode(inode)) + want_delete = 1; + + truncate_inode_pages_final(&inode->i_data); + if (want_delete) { + inode->i_size = 0; + if (inode->i_blocks && + (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || + S_ISLNK(inode->i_mode))) + ufs_truncate_blocks(inode); + ufs_update_inode(inode, inode_needs_sync(inode)); + } + + invalidate_inode_buffers(inode); + clear_inode(inode); + + if (want_delete) + ufs_free_inode(inode); +} + +struct to_free { + struct inode *inode; + u64 to; + unsigned count; +}; + +static inline void free_data(struct to_free *ctx, u64 from, unsigned count) +{ + if (ctx->count && ctx->to != from) { + ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count); + ctx->count = 0; + } + ctx->count += count; + ctx->to = from + count; +} + +#define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift) + +static void ufs_trunc_direct(struct inode *inode) +{ + struct ufs_inode_info *ufsi = UFS_I(inode); + struct super_block * sb; + struct ufs_sb_private_info * uspi; + void *p; + u64 frag1, frag2, frag3, frag4, block1, block2; + struct to_free ctx = {.inode = inode}; + unsigned i, tmp; + + UFSD("ENTER: ino %lu\n", inode->i_ino); + + sb = inode->i_sb; + uspi = UFS_SB(sb)->s_uspi; + + frag1 = DIRECT_FRAGMENT; + frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag); + frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1); + frag3 = frag4 & ~uspi->s_fpbmask; + block1 = block2 = 0; + if (frag2 > frag3) { + frag2 = frag4; + frag3 = frag4 = 0; + } else if (frag2 < frag3) { + block1 = ufs_fragstoblks (frag2); + block2 = ufs_fragstoblks (frag3); + } + + UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu," + " frag3 %llu, frag4 %llu\n", inode->i_ino, + (unsigned long long)frag1, (unsigned long long)frag2, + (unsigned long long)block1, (unsigned long long)block2, + (unsigned long long)frag3, (unsigned long long)frag4); + + if (frag1 >= frag2) + goto next1; + + /* + * Free first free fragments + */ + p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1)); + tmp = ufs_data_ptr_to_cpu(sb, p); + if (!tmp ) + ufs_panic (sb, "ufs_trunc_direct", "internal error"); + frag2 -= frag1; + frag1 = ufs_fragnum (frag1); + + ufs_free_fragments(inode, tmp + frag1, frag2); + +next1: + /* + * Free whole blocks + */ + for (i = block1 ; i < block2; i++) { + p = ufs_get_direct_data_ptr(uspi, ufsi, i); + tmp = ufs_data_ptr_to_cpu(sb, p); + if (!tmp) + continue; + write_seqlock(&ufsi->meta_lock); + ufs_data_ptr_clear(uspi, p); + write_sequnlock(&ufsi->meta_lock); + + free_data(&ctx, tmp, uspi->s_fpb); + } + + free_data(&ctx, 0, 0); + + if (frag3 >= frag4) + goto next3; + + /* + * Free last free fragments + */ + p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3)); + tmp = ufs_data_ptr_to_cpu(sb, p); + if (!tmp ) + ufs_panic(sb, "ufs_truncate_direct", "internal error"); + frag4 = ufs_fragnum (frag4); + write_seqlock(&ufsi->meta_lock); + ufs_data_ptr_clear(uspi, p); + write_sequnlock(&ufsi->meta_lock); + + ufs_free_fragments (inode, tmp, frag4); + next3: + + UFSD("EXIT: ino %lu\n", inode->i_ino); +} + +static void free_full_branch(struct inode *inode, u64 ind_block, int depth) +{ + struct super_block *sb = inode->i_sb; + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize); + unsigned i; + + if (!ubh) + return; + + if (--depth) { + for (i = 0; i < uspi->s_apb; i++) { + void *p = ubh_get_data_ptr(uspi, ubh, i); + u64 block = ufs_data_ptr_to_cpu(sb, p); + if (block) + free_full_branch(inode, block, depth); + } + } else { + struct to_free ctx = {.inode = inode}; + + for (i = 0; i < uspi->s_apb; i++) { + void *p = ubh_get_data_ptr(uspi, ubh, i); + u64 block = ufs_data_ptr_to_cpu(sb, p); + if (block) + free_data(&ctx, block, uspi->s_fpb); + } + free_data(&ctx, 0, 0); + } + + ubh_bforget(ubh); + ufs_free_blocks(inode, ind_block, uspi->s_fpb); +} + +static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth) +{ + struct super_block *sb = inode->i_sb; + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + unsigned i; + + if (--depth) { + for (i = from; i < uspi->s_apb ; i++) { + void *p = ubh_get_data_ptr(uspi, ubh, i); + u64 block = ufs_data_ptr_to_cpu(sb, p); + if (block) { + write_seqlock(&UFS_I(inode)->meta_lock); + ufs_data_ptr_clear(uspi, p); + write_sequnlock(&UFS_I(inode)->meta_lock); + ubh_mark_buffer_dirty(ubh); + free_full_branch(inode, block, depth); + } + } + } else { + struct to_free ctx = {.inode = inode}; + + for (i = from; i < uspi->s_apb; i++) { + void *p = ubh_get_data_ptr(uspi, ubh, i); + u64 block = ufs_data_ptr_to_cpu(sb, p); + if (block) { + write_seqlock(&UFS_I(inode)->meta_lock); + ufs_data_ptr_clear(uspi, p); + write_sequnlock(&UFS_I(inode)->meta_lock); + ubh_mark_buffer_dirty(ubh); + free_data(&ctx, block, uspi->s_fpb); + } + } + free_data(&ctx, 0, 0); + } + if (IS_SYNC(inode) && ubh_buffer_dirty(ubh)) + ubh_sync_block(ubh); + ubh_brelse(ubh); +} + +static int ufs_alloc_lastblock(struct inode *inode, loff_t size) +{ + int err = 0; + struct super_block *sb = inode->i_sb; + struct address_space *mapping = inode->i_mapping; + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + unsigned i, end; + sector_t lastfrag; + struct page *lastpage; + struct buffer_head *bh; + u64 phys64; + + lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift; + + if (!lastfrag) + goto out; + + lastfrag--; + + lastpage = ufs_get_locked_page(mapping, lastfrag >> + (PAGE_SHIFT - inode->i_blkbits)); + if (IS_ERR(lastpage)) { + err = -EIO; + goto out; + } + + end = lastfrag & ((1 << (PAGE_SHIFT - inode->i_blkbits)) - 1); + bh = page_buffers(lastpage); + for (i = 0; i < end; ++i) + bh = bh->b_this_page; + + + err = ufs_getfrag_block(inode, lastfrag, bh, 1); + + if (unlikely(err)) + goto out_unlock; + + if (buffer_new(bh)) { + clear_buffer_new(bh); + clean_bdev_bh_alias(bh); + /* + * we do not zeroize fragment, because of + * if it maped to hole, it already contains zeroes + */ + set_buffer_uptodate(bh); + mark_buffer_dirty(bh); + set_page_dirty(lastpage); + } + + if (lastfrag >= UFS_IND_FRAGMENT) { + end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1; + phys64 = bh->b_blocknr + 1; + for (i = 0; i < end; ++i) { + bh = sb_getblk(sb, i + phys64); + lock_buffer(bh); + memset(bh->b_data, 0, sb->s_blocksize); + set_buffer_uptodate(bh); + mark_buffer_dirty(bh); + unlock_buffer(bh); + sync_dirty_buffer(bh); + brelse(bh); + } + } +out_unlock: + ufs_put_locked_page(lastpage); +out: + return err; +} + +static void ufs_truncate_blocks(struct inode *inode) +{ + struct ufs_inode_info *ufsi = UFS_I(inode); + struct super_block *sb = inode->i_sb; + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + unsigned offsets[4]; + int depth; + int depth2; + unsigned i; + struct ufs_buffer_head *ubh[3]; + void *p; + u64 block; + + if (inode->i_size) { + sector_t last = (inode->i_size - 1) >> uspi->s_bshift; + depth = ufs_block_to_path(inode, last, offsets); + if (!depth) + return; + } else { + depth = 1; + } + + for (depth2 = depth - 1; depth2; depth2--) + if (offsets[depth2] != uspi->s_apb - 1) + break; + + mutex_lock(&ufsi->truncate_mutex); + if (depth == 1) { + ufs_trunc_direct(inode); + offsets[0] = UFS_IND_BLOCK; + } else { + /* get the blocks that should be partially emptied */ + p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]++); + for (i = 0; i < depth2; i++) { + block = ufs_data_ptr_to_cpu(sb, p); + if (!block) + break; + ubh[i] = ubh_bread(sb, block, uspi->s_bsize); + if (!ubh[i]) { + write_seqlock(&ufsi->meta_lock); + ufs_data_ptr_clear(uspi, p); + write_sequnlock(&ufsi->meta_lock); + break; + } + p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]++); + } + while (i--) + free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1); + } + for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) { + p = ufs_get_direct_data_ptr(uspi, ufsi, i); + block = ufs_data_ptr_to_cpu(sb, p); + if (block) { + write_seqlock(&ufsi->meta_lock); + ufs_data_ptr_clear(uspi, p); + write_sequnlock(&ufsi->meta_lock); + free_full_branch(inode, block, i - UFS_IND_BLOCK + 1); + } + } + read_seqlock_excl(&ufsi->meta_lock); + ufsi->i_lastfrag = DIRECT_FRAGMENT; + read_sequnlock_excl(&ufsi->meta_lock); + mark_inode_dirty(inode); + mutex_unlock(&ufsi->truncate_mutex); +} + +static int ufs_truncate(struct inode *inode, loff_t size) +{ + int err = 0; + + UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n", + inode->i_ino, (unsigned long long)size, + (unsigned long long)i_size_read(inode)); + + if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || + S_ISLNK(inode->i_mode))) + return -EINVAL; + if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) + return -EPERM; + + err = ufs_alloc_lastblock(inode, size); + + if (err) + goto out; + + block_truncate_page(inode->i_mapping, size, ufs_getfrag_block); + + truncate_setsize(inode, size); + + ufs_truncate_blocks(inode); + inode->i_mtime = inode->i_ctime = current_time(inode); + mark_inode_dirty(inode); +out: + UFSD("EXIT: err %d\n", err); + return err; +} + +int ufs_setattr(struct dentry *dentry, struct iattr *attr) +{ + struct inode *inode = d_inode(dentry); + unsigned int ia_valid = attr->ia_valid; + int error; + + error = setattr_prepare(dentry, attr); + if (error) + return error; + + if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) { + error = ufs_truncate(inode, attr->ia_size); + if (error) + return error; + } + + setattr_copy(inode, attr); + mark_inode_dirty(inode); + return 0; +} + +const struct inode_operations ufs_file_inode_operations = { + .setattr = ufs_setattr, +}; |