| /* |
| * 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 <asm/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 "ufs_fs.h" |
| #include "ufs.h" |
| #include "swab.h" |
| #include "util.h" |
| |
| static u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock); |
| |
| static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t 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; |
| } |
| |
| /* |
| * Returns the location of the fragment from |
| * the beginning of the filesystem. |
| */ |
| |
| static u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock) |
| { |
| 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; |
| sector_t offsets[4], *p; |
| int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets); |
| u64 ret = 0L; |
| __fs32 block; |
| __fs64 u2_block = 0L; |
| unsigned flags = UFS_SB(sb)->s_flags; |
| u64 temp = 0L; |
| |
| UFSD(": frag = %llu depth = %d\n", (unsigned long long)frag, depth); |
| 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) |
| return 0; |
| |
| p = offsets; |
| |
| if (needs_lock) |
| lock_ufs(sb); |
| if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) |
| goto ufs2; |
| |
| block = ufsi->i_u1.i_data[*p++]; |
| if (!block) |
| goto out; |
| while (--depth) { |
| struct buffer_head *bh; |
| sector_t n = *p++; |
| |
| bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift)); |
| if (!bh) |
| goto out; |
| block = ((__fs32 *) bh->b_data)[n & mask]; |
| brelse (bh); |
| if (!block) |
| goto out; |
| } |
| ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask)); |
| goto out; |
| ufs2: |
| u2_block = ufsi->i_u1.u2_i_data[*p++]; |
| if (!u2_block) |
| goto out; |
| |
| |
| while (--depth) { |
| struct buffer_head *bh; |
| sector_t n = *p++; |
| |
| |
| temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block); |
| bh = sb_bread(sb, temp +(u64) (n>>shift)); |
| if (!bh) |
| goto out; |
| u2_block = ((__fs64 *)bh->b_data)[n & mask]; |
| brelse(bh); |
| if (!u2_block) |
| goto out; |
| } |
| temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block); |
| ret = temp + (u64) (frag & uspi->s_fpbmask); |
| |
| out: |
| if (needs_lock) |
| unlock_ufs(sb); |
| return ret; |
| } |
| |
| /** |
| * ufs_inode_getfrag() - allocate new fragment(s) |
| * @inode: pointer to inode |
| * @fragment: number of `fragment' which hold pointer |
| * to new allocated fragment(s) |
| * @new_fragment: number of new allocated fragment(s) |
| * @required: how many fragment(s) we require |
| * @err: we set it if something wrong |
| * @phys: pointer to where we save physical number of new allocated fragments, |
| * NULL if we allocate not data(indirect blocks for example). |
| * @new: we set it if we allocate new block |
| * @locked_page: for ufs_new_fragments() |
| */ |
| static struct buffer_head * |
| ufs_inode_getfrag(struct inode *inode, u64 fragment, |
| sector_t new_fragment, unsigned int required, int *err, |
| long *phys, 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; |
| struct buffer_head * result; |
| unsigned blockoff, lastblockoff; |
| u64 tmp, goal, lastfrag, block, lastblock; |
| void *p, *p2; |
| |
| UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, " |
| "metadata %d\n", inode->i_ino, (unsigned long long)fragment, |
| (unsigned long long)new_fragment, required, !phys); |
| |
| /* TODO : to be done for write support |
| if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) |
| goto ufs2; |
| */ |
| |
| block = ufs_fragstoblks (fragment); |
| blockoff = ufs_fragnum (fragment); |
| p = ufs_get_direct_data_ptr(uspi, ufsi, block); |
| |
| goal = 0; |
| |
| repeat: |
| tmp = ufs_data_ptr_to_cpu(sb, p); |
| |
| lastfrag = ufsi->i_lastfrag; |
| if (tmp && fragment < lastfrag) { |
| if (!phys) { |
| result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); |
| if (tmp == ufs_data_ptr_to_cpu(sb, p)) { |
| UFSD("EXIT, result %llu\n", |
| (unsigned long long)tmp + blockoff); |
| return result; |
| } |
| brelse (result); |
| goto repeat; |
| } else { |
| *phys = uspi->s_sbbase + tmp + blockoff; |
| return NULL; |
| } |
| } |
| |
| lastblock = ufs_fragstoblks (lastfrag); |
| lastblockoff = ufs_fragnum (lastfrag); |
| /* |
| * We will extend file into new block beyond last allocated block |
| */ |
| if (lastblock < block) { |
| /* |
| * We must reallocate last allocated block |
| */ |
| if (lastblockoff) { |
| p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock); |
| tmp = ufs_new_fragments(inode, p2, lastfrag, |
| ufs_data_ptr_to_cpu(sb, p2), |
| uspi->s_fpb - lastblockoff, |
| err, locked_page); |
| if (!tmp) { |
| if (lastfrag != ufsi->i_lastfrag) |
| goto repeat; |
| else |
| return NULL; |
| } |
| lastfrag = ufsi->i_lastfrag; |
| |
| } |
| tmp = ufs_data_ptr_to_cpu(sb, |
| ufs_get_direct_data_ptr(uspi, ufsi, |
| lastblock)); |
| if (tmp) |
| goal = tmp + uspi->s_fpb; |
| tmp = ufs_new_fragments (inode, p, fragment - blockoff, |
| goal, required + blockoff, |
| err, |
| phys != NULL ? locked_page : NULL); |
| } else if (lastblock == block) { |
| /* |
| * We will extend last allocated block |
| */ |
| tmp = ufs_new_fragments(inode, p, fragment - |
| (blockoff - lastblockoff), |
| ufs_data_ptr_to_cpu(sb, p), |
| required + (blockoff - lastblockoff), |
| err, phys != NULL ? locked_page : NULL); |
| } else /* (lastblock > block) */ { |
| /* |
| * We will allocate new block before last allocated block |
| */ |
| if (block) { |
| tmp = ufs_data_ptr_to_cpu(sb, |
| ufs_get_direct_data_ptr(uspi, ufsi, block - 1)); |
| if (tmp) |
| goal = tmp + uspi->s_fpb; |
| } |
| tmp = ufs_new_fragments(inode, p, fragment - blockoff, |
| goal, uspi->s_fpb, err, |
| phys != NULL ? locked_page : NULL); |
| } |
| if (!tmp) { |
| if ((!blockoff && ufs_data_ptr_to_cpu(sb, p)) || |
| (blockoff && lastfrag != ufsi->i_lastfrag)) |
| goto repeat; |
| *err = -ENOSPC; |
| return NULL; |
| } |
| |
| if (!phys) { |
| result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); |
| } else { |
| *phys = uspi->s_sbbase + tmp + blockoff; |
| result = NULL; |
| *err = 0; |
| *new = 1; |
| } |
| |
| inode->i_ctime = CURRENT_TIME_SEC; |
| if (IS_SYNC(inode)) |
| ufs_sync_inode (inode); |
| mark_inode_dirty(inode); |
| UFSD("EXIT, result %llu\n", (unsigned long long)tmp + blockoff); |
| return result; |
| |
| /* 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 |
| * @bh: pointer to block which hold "pointer" to new allocated block |
| * @fragment: number of `fragment' which hold pointer |
| * to new allocated block |
| * @new_fragment: number of new allocated fragment |
| * (block will hold this fragment and also uspi->s_fpb-1) |
| * @err: see ufs_inode_getfrag() |
| * @phys: see ufs_inode_getfrag() |
| * @new: see ufs_inode_getfrag() |
| * @locked_page: see ufs_inode_getfrag() |
| */ |
| static struct buffer_head * |
| ufs_inode_getblock(struct inode *inode, struct buffer_head *bh, |
| u64 fragment, sector_t new_fragment, int *err, |
| long *phys, int *new, struct page *locked_page) |
| { |
| struct super_block *sb = inode->i_sb; |
| struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
| struct buffer_head * result; |
| unsigned blockoff; |
| u64 tmp, goal, block; |
| void *p; |
| |
| block = ufs_fragstoblks (fragment); |
| blockoff = ufs_fragnum (fragment); |
| |
| UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n", |
| inode->i_ino, (unsigned long long)fragment, |
| (unsigned long long)new_fragment, !phys); |
| |
| result = NULL; |
| if (!bh) |
| goto out; |
| if (!buffer_uptodate(bh)) { |
| ll_rw_block (READ, 1, &bh); |
| wait_on_buffer (bh); |
| if (!buffer_uptodate(bh)) |
| goto out; |
| } |
| if (uspi->fs_magic == UFS2_MAGIC) |
| p = (__fs64 *)bh->b_data + block; |
| else |
| p = (__fs32 *)bh->b_data + block; |
| repeat: |
| tmp = ufs_data_ptr_to_cpu(sb, p); |
| if (tmp) { |
| if (!phys) { |
| result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); |
| if (tmp == ufs_data_ptr_to_cpu(sb, p)) |
| goto out; |
| brelse (result); |
| goto repeat; |
| } else { |
| *phys = uspi->s_sbbase + tmp + blockoff; |
| goto out; |
| } |
| } |
| |
| if (block && (uspi->fs_magic == UFS2_MAGIC ? |
| (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) : |
| (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-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) { |
| if (ufs_data_ptr_to_cpu(sb, p)) |
| goto repeat; |
| goto out; |
| } |
| |
| |
| if (!phys) { |
| result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); |
| } else { |
| *phys = uspi->s_sbbase + tmp + blockoff; |
| *new = 1; |
| } |
| |
| mark_buffer_dirty(bh); |
| if (IS_SYNC(inode)) |
| sync_dirty_buffer(bh); |
| inode->i_ctime = CURRENT_TIME_SEC; |
| mark_inode_dirty(inode); |
| UFSD("result %llu\n", (unsigned long long)tmp + blockoff); |
| out: |
| brelse (bh); |
| UFSD("EXIT\n"); |
| return result; |
| } |
| |
| /** |
| * ufs_getfrag_block() - `get_block_t' function, interface between UFS and |
| * readpage, writepage and so on |
| */ |
| |
| 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_info * sbi = UFS_SB(sb); |
| struct ufs_sb_private_info * uspi = sbi->s_uspi; |
| struct buffer_head * bh; |
| int ret, err, new; |
| unsigned long ptr,phys; |
| u64 phys64 = 0; |
| bool needs_lock = (sbi->mutex_owner != current); |
| |
| if (!create) { |
| phys64 = ufs_frag_map(inode, fragment, needs_lock); |
| UFSD("phys64 = %llu\n", (unsigned long long)phys64); |
| if (phys64) |
| map_bh(bh_result, sb, phys64); |
| return 0; |
| } |
| |
| /* This code entered only while writing ....? */ |
| |
| err = -EIO; |
| new = 0; |
| ret = 0; |
| bh = NULL; |
| |
| if (needs_lock) |
| lock_ufs(sb); |
| |
| UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); |
| if (fragment > |
| ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb) |
| << uspi->s_fpbshift)) |
| goto abort_too_big; |
| |
| err = 0; |
| ptr = fragment; |
| |
| /* |
| * ok, these macros clean the logic up a bit and make |
| * it much more readable: |
| */ |
| #define GET_INODE_DATABLOCK(x) \ |
| ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\ |
| bh_result->b_page) |
| #define GET_INODE_PTR(x) \ |
| ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\ |
| bh_result->b_page) |
| #define GET_INDIRECT_DATABLOCK(x) \ |
| ufs_inode_getblock(inode, bh, x, fragment, \ |
| &err, &phys, &new, bh_result->b_page) |
| #define GET_INDIRECT_PTR(x) \ |
| ufs_inode_getblock(inode, bh, x, fragment, \ |
| &err, NULL, NULL, NULL) |
| |
| if (ptr < UFS_NDIR_FRAGMENT) { |
| bh = GET_INODE_DATABLOCK(ptr); |
| goto out; |
| } |
| ptr -= UFS_NDIR_FRAGMENT; |
| if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) { |
| bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift)); |
| goto get_indirect; |
| } |
| ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); |
| if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) { |
| bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift)); |
| goto get_double; |
| } |
| ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); |
| bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift)); |
| bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask); |
| get_double: |
| bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask); |
| get_indirect: |
| bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask); |
| |
| #undef GET_INODE_DATABLOCK |
| #undef GET_INODE_PTR |
| #undef GET_INDIRECT_DATABLOCK |
| #undef GET_INDIRECT_PTR |
| |
| out: |
| if (err) |
| goto abort; |
| if (new) |
| set_buffer_new(bh_result); |
| map_bh(bh_result, sb, phys); |
| abort: |
| if (needs_lock) |
| unlock_ufs(sb); |
| |
| return err; |
| |
| abort_too_big: |
| ufs_warning(sb, "ufs_get_block", "block > big"); |
| goto abort; |
| } |
| |
| 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_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); |
| } |
| |
| 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 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 = generic_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_op = &ufs_fast_symlink_inode_operations; |
| else { |
| inode->i_op = &ufs_symlink_inode_operations; |
| inode->i_mapping->a_ops = &ufs_aops; |
| } |
| } 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) { |
| ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); |
| return -1; |
| } |
| |
| /* |
| * 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 = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); |
| inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); |
| inode->i_mtime.tv_sec = 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) { |
| ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); |
| return -1; |
| } |
| |
| /* |
| * 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; |
| |
| 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)); |
| } |
| |
| if (err) |
| goto bad_inode; |
| inode->i_version++; |
| 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); |
| |
| brelse(bh); |
| |
| UFSD("EXIT\n"); |
| unlock_new_inode(inode); |
| return inode; |
| |
| bad_inode: |
| iget_failed(inode); |
| return ERR_PTR(-EIO); |
| } |
| |
| 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) |
| { |
| int ret; |
| lock_ufs(inode->i_sb); |
| ret = ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
| unlock_ufs(inode->i_sb); |
| return ret; |
| } |
| |
| 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) { |
| loff_t old_i_size; |
| /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/ |
| lock_ufs(inode->i_sb); |
| mark_inode_dirty(inode); |
| ufs_update_inode(inode, IS_SYNC(inode)); |
| old_i_size = inode->i_size; |
| inode->i_size = 0; |
| if (inode->i_blocks && ufs_truncate(inode, old_i_size)) |
| ufs_warning(inode->i_sb, __func__, "ufs_truncate failed\n"); |
| unlock_ufs(inode->i_sb); |
| } |
| |
| invalidate_inode_buffers(inode); |
| clear_inode(inode); |
| |
| if (want_delete) { |
| lock_ufs(inode->i_sb); |
| ufs_free_inode(inode); |
| unlock_ufs(inode->i_sb); |
| } |
| } |