This is the second patch of a series that will eventually remove the
filesystem-specific includes, the struct inode union and the struct
super_block union from linux/fs.h. See part 1 of this series for a
description of the approach.
This patch abstracts all references to the ext2-specific inode union through
the following inlin3 function:
static inline struct ext2_inode_info *ext2_i (struct inode *inode)
{
return (struct ext2_inode_info *) &(inode->u);
}
The ext2_i member of the struct inode union is renamed as ext2_inode_info
to simplify detection of references to the inode union from out-of-tree ext2
code.
To apply this patch:
cd /your/source/tree
cat this/patch | patch -p0
I strongly recommended that this patch not be tested on a system containing
valuable data - user mode linux is the way to go.
-- Daniel--- ../2.4.17.clean/fs/ext2/dir.c Mon Sep 17 16:16:30 2001 +++ ./fs/ext2/dir.c Thu Dec 27 02:40:12 2001 @@ -300,6 +300,7 @@ struct ext2_dir_entry_2 * ext2_find_entry (struct inode * dir, struct dentry *dentry, struct page ** res_page) { + struct ext2_inode_info *ei = ext2_i(dir); const char *name = dentry->d_name.name; int namelen = dentry->d_name.len; unsigned reclen = EXT2_DIR_REC_LEN(namelen); @@ -311,7 +312,7 @@ /* OFFSET_CACHE */ *res_page = NULL; - start = dir->u.ext2_i.i_dir_start_lookup; + start = ei->i_dir_start_lookup; if (start >= npages) start = 0; n = start; @@ -336,7 +337,7 @@ found: *res_page = page; - dir->u.ext2_i.i_dir_start_lookup = n; + ei->i_dir_start_lookup = n; return de; } --- ../2.4.17.clean/fs/ext2/ialloc.c Sun Nov 11 12:59:56 2001 +++ ./fs/ext2/ialloc.c Thu Dec 27 02:51:24 2001 @@ -314,6 +314,7 @@ struct inode * ext2_new_inode (const struct inode * dir, int mode) { + struct ext2_inode_info *di = ext2_i(dir), *ei; struct super_block * sb; struct buffer_head * bh; struct buffer_head * bh2; @@ -326,6 +327,7 @@ sb = dir->i_sb; inode = new_inode(sb); + ei = ext2_i(inode); if (!inode) return ERR_PTR(-ENOMEM); @@ -333,9 +335,9 @@ es = sb->u.ext2_sb.s_es; repeat: if (S_ISDIR(mode)) - group = find_group_dir(sb, dir->u.ext2_i.i_block_group); + group = find_group_dir(sb, di->i_block_group); else - group = find_group_other(sb, dir->u.ext2_i.i_block_group); + group = find_group_other(sb, di->i_block_group); err = -ENOSPC; if (group == -1) @@ -386,12 +388,12 @@ inode->i_blksize = PAGE_SIZE; /* This is the optimal IO size (for stat), not the fs block size */ inode->i_blocks = 0; inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; - inode->u.ext2_i.i_new_inode = 1; - inode->u.ext2_i.i_flags = dir->u.ext2_i.i_flags; + ei->i_new_inode = 1; + ei->i_flags = di->i_flags; if (S_ISLNK(mode)) - inode->u.ext2_i.i_flags &= ~(EXT2_IMMUTABLE_FL|EXT2_APPEND_FL); - inode->u.ext2_i.i_block_group = group; - if (inode->u.ext2_i.i_flags & EXT2_SYNC_FL) + ei->i_flags &= ~(EXT2_IMMUTABLE_FL|EXT2_APPEND_FL); + ei->i_block_group = group; + if (ei->i_flags & EXT2_SYNC_FL) inode->i_flags |= S_SYNC; insert_inode_hash(inode); inode->i_generation = event++; --- ../2.4.17.clean/fs/ext2/inode.c Wed Nov 21 17:07:25 2001 +++ ./fs/ext2/inode.c Thu Dec 27 00:55:13 2001 @@ -57,7 +57,7 @@ inode->i_ino == EXT2_ACL_IDX_INO || inode->i_ino == EXT2_ACL_DATA_INO) goto no_delete; - inode->u.ext2_i.i_dtime = CURRENT_TIME; + ext2_i(inode)->i_dtime = CURRENT_TIME; mark_inode_dirty(inode); ext2_update_inode(inode, IS_SYNC(inode)); inode->i_size = 0; @@ -75,13 +75,14 @@ void ext2_discard_prealloc (struct inode * inode) { #ifdef EXT2_PREALLOCATE + struct ext2_inode_info *ei = ext2_i(inode); lock_kernel(); /* Writer: ->i_prealloc* */ - if (inode->u.ext2_i.i_prealloc_count) { - unsigned short total = inode->u.ext2_i.i_prealloc_count; - unsigned long block = inode->u.ext2_i.i_prealloc_block; - inode->u.ext2_i.i_prealloc_count = 0; - inode->u.ext2_i.i_prealloc_block = 0; + if (ext2_i(inode)->i_prealloc_count) { + unsigned short total = ext2_i(inode)->i_prealloc_count; + unsigned long block = ei->i_prealloc_block; + ei->i_prealloc_count = 0; + ei->i_prealloc_block = 0; /* Writer: end */ ext2_free_blocks (inode, block, total); } @@ -91,6 +92,7 @@ static int ext2_alloc_block (struct inode * inode, unsigned long goal, int *err) { + struct ext2_inode_info *ei = ext2_i(inode); #ifdef EXT2FS_DEBUG static unsigned long alloc_hits = 0, alloc_attempts = 0; #endif @@ -99,12 +101,12 @@ #ifdef EXT2_PREALLOCATE /* Writer: ->i_prealloc* */ - if (inode->u.ext2_i.i_prealloc_count && - (goal == inode->u.ext2_i.i_prealloc_block || - goal + 1 == inode->u.ext2_i.i_prealloc_block)) + if (ei->i_prealloc_count && + (goal == ei->i_prealloc_block || + goal + 1 == ei->i_prealloc_block)) { - result = inode->u.ext2_i.i_prealloc_block++; - inode->u.ext2_i.i_prealloc_count--; + result = ei->i_prealloc_block++; + ei->i_prealloc_count--; /* Writer: end */ ext2_debug ("preallocation hit (%lu/%lu).\n", ++alloc_hits, ++alloc_attempts); @@ -114,8 +116,8 @@ alloc_hits, ++alloc_attempts); if (S_ISREG(inode->i_mode)) result = ext2_new_block (inode, goal, - &inode->u.ext2_i.i_prealloc_count, - &inode->u.ext2_i.i_prealloc_block, err); + &ei->i_prealloc_count, + &ei->i_prealloc_block, err); else result = ext2_new_block (inode, goal, 0, 0, err); } @@ -239,6 +241,7 @@ Indirect chain[4], int *err) { + struct ext2_inode_info *ei = ext2_i(inode); kdev_t dev = inode->i_dev; int size = inode->i_sb->s_blocksize; Indirect *p = chain; @@ -246,7 +249,7 @@ *err = 0; /* i_data is not going away, no lock needed */ - add_chain (chain, NULL, inode->u.ext2_i.i_data + *offsets); + add_chain (chain, NULL, ei->i_data + *offsets); if (!p->key) goto no_block; while (--depth) { @@ -288,7 +291,8 @@ static inline unsigned long ext2_find_near(struct inode *inode, Indirect *ind) { - u32 *start = ind->bh ? (u32*) ind->bh->b_data : inode->u.ext2_i.i_data; + struct ext2_inode_info *ei = ext2_i(inode); + u32 *start = ind->bh? (u32*) ind->bh->b_data: ei->i_data; u32 *p; /* Try to find previous block */ @@ -304,8 +308,7 @@ * It is going to be refered from inode itself? OK, just put it into * the same cylinder group then. */ - return (inode->u.ext2_i.i_block_group * - EXT2_BLOCKS_PER_GROUP(inode->i_sb)) + + return (ei->i_block_group * EXT2_BLOCKS_PER_GROUP(inode->i_sb)) + le32_to_cpu(inode->i_sb->u.ext2_sb.s_es->s_first_data_block); } @@ -328,10 +331,11 @@ Indirect *partial, unsigned long *goal) { + struct ext2_inode_info *ei = ext2_i(inode); /* Writer: ->i_next_alloc* */ - if (block == inode->u.ext2_i.i_next_alloc_block + 1) { - inode->u.ext2_i.i_next_alloc_block++; - inode->u.ext2_i.i_next_alloc_goal++; + if (block == ei->i_next_alloc_block + 1) { + ei->i_next_alloc_block++; + ei->i_next_alloc_goal++; } /* Writer: end */ /* Reader: pointers, ->i_next_alloc* */ @@ -340,8 +344,8 @@ * try the heuristic for sequential allocation, * failing that at least try to get decent locality. */ - if (block == inode->u.ext2_i.i_next_alloc_block) - *goal = inode->u.ext2_i.i_next_alloc_goal; + if (block == ei->i_next_alloc_block) + *goal = ei->i_next_alloc_goal; if (!*goal) *goal = ext2_find_near(inode, partial); return 0; @@ -408,7 +412,7 @@ mark_buffer_uptodate(bh, 1); unlock_buffer(bh); mark_buffer_dirty_inode(bh, inode); - if (IS_SYNC(inode) || inode->u.ext2_i.i_osync) { + if (IS_SYNC(inode) || ext2_i(inode)->i_osync) { ll_rw_block (WRITE, 1, &bh); wait_on_buffer (bh); } @@ -448,6 +452,7 @@ Indirect *where, int num) { + struct ext2_inode_info *ei = ext2_i(inode); int i; /* Verify that place we are splicing to is still there and vacant */ @@ -460,8 +465,8 @@ /* That's it */ *where->p = where->key; - inode->u.ext2_i.i_next_alloc_block = block; - inode->u.ext2_i.i_next_alloc_goal = le32_to_cpu(where[num-1].key); + ei->i_next_alloc_block = block; + ei->i_next_alloc_goal = le32_to_cpu(where[num-1].key); /* Writer: end */ @@ -472,13 +477,13 @@ /* had we spliced it onto indirect block? */ if (where->bh) { mark_buffer_dirty_inode(where->bh, inode); - if (IS_SYNC(inode) || inode->u.ext2_i.i_osync) { + if (IS_SYNC(inode) || ei->i_osync) { ll_rw_block (WRITE, 1, &where->bh); wait_on_buffer(where->bh); } } - if (IS_SYNC(inode) || inode->u.ext2_i.i_osync) + if (IS_SYNC(inode) || ei->i_osync) ext2_sync_inode (inode); else mark_inode_dirty(inode); @@ -788,7 +793,8 @@ void ext2_truncate (struct inode * inode) { - u32 *i_data = inode->u.ext2_i.i_data; + struct ext2_inode_info *ei = ext2_i(inode); + u32 *i_data = ei->i_data; int addr_per_block = EXT2_ADDR_PER_BLOCK(inode->i_sb); int offsets[4]; Indirect chain[4]; @@ -881,6 +887,7 @@ void ext2_read_inode (struct inode * inode) { + struct ext2_inode_info *ei = ext2_i(inode); struct buffer_head * bh; struct ext2_inode * raw_inode; unsigned long block_group; @@ -942,13 +949,13 @@ inode->i_atime = le32_to_cpu(raw_inode->i_atime); inode->i_ctime = le32_to_cpu(raw_inode->i_ctime); inode->i_mtime = le32_to_cpu(raw_inode->i_mtime); - inode->u.ext2_i.i_dtime = le32_to_cpu(raw_inode->i_dtime); + ei->i_dtime = le32_to_cpu(raw_inode->i_dtime); /* We now have enough fields to check if the inode was active or not. * This is needed because nfsd might try to access dead inodes * the test is that same one that e2fsck uses * NeilBrown 1999oct15 */ - if (inode->i_nlink == 0 && (inode->i_mode == 0 || inode->u.ext2_i.i_dtime)) { + if (inode->i_nlink == 0 && (inode->i_mode == 0 || ei->i_dtime)) { /* this inode is deleted */ brelse (bh); goto bad_inode; @@ -956,25 +963,25 @@ inode->i_blksize = PAGE_SIZE; /* This is the optimal IO size (for stat), not the fs block size */ inode->i_blocks = le32_to_cpu(raw_inode->i_blocks); inode->i_version = ++event; - inode->u.ext2_i.i_flags = le32_to_cpu(raw_inode->i_flags); - inode->u.ext2_i.i_faddr = le32_to_cpu(raw_inode->i_faddr); - inode->u.ext2_i.i_frag_no = raw_inode->i_frag; - inode->u.ext2_i.i_frag_size = raw_inode->i_fsize; - inode->u.ext2_i.i_file_acl = le32_to_cpu(raw_inode->i_file_acl); + ei->i_flags = le32_to_cpu(raw_inode->i_flags); + ei->i_faddr = le32_to_cpu(raw_inode->i_faddr); + ei->i_frag_no = raw_inode->i_frag; + ei->i_frag_size = raw_inode->i_fsize; + ei->i_file_acl = le32_to_cpu(raw_inode->i_file_acl); if (S_ISREG(inode->i_mode)) inode->i_size |= ((__u64)le32_to_cpu(raw_inode->i_size_high)) << 32; else - inode->u.ext2_i.i_dir_acl = le32_to_cpu(raw_inode->i_dir_acl); + ei->i_dir_acl = le32_to_cpu(raw_inode->i_dir_acl); inode->i_generation = le32_to_cpu(raw_inode->i_generation); - inode->u.ext2_i.i_prealloc_count = 0; - inode->u.ext2_i.i_block_group = block_group; + ei->i_prealloc_count = 0; + ei->i_block_group = block_group; /* * NOTE! The in-memory inode i_data array is in little-endian order * even on big-endian machines: we do NOT byteswap the block numbers! */ for (block = 0; block < EXT2_N_BLOCKS; block++) - inode->u.ext2_i.i_data[block] = raw_inode->i_block[block]; + ei->i_data[block] = raw_inode->i_block[block]; if (inode->i_ino == EXT2_ACL_IDX_INO || inode->i_ino == EXT2_ACL_DATA_INO) @@ -999,19 +1006,19 @@ le32_to_cpu(raw_inode->i_block[0])); brelse (bh); inode->i_attr_flags = 0; - if (inode->u.ext2_i.i_flags & EXT2_SYNC_FL) { + if (ei->i_flags & EXT2_SYNC_FL) { inode->i_attr_flags |= ATTR_FLAG_SYNCRONOUS; inode->i_flags |= S_SYNC; } - if (inode->u.ext2_i.i_flags & EXT2_APPEND_FL) { + if (ei->i_flags & EXT2_APPEND_FL) { inode->i_attr_flags |= ATTR_FLAG_APPEND; inode->i_flags |= S_APPEND; } - if (inode->u.ext2_i.i_flags & EXT2_IMMUTABLE_FL) { + if (ei->i_flags & EXT2_IMMUTABLE_FL) { inode->i_attr_flags |= ATTR_FLAG_IMMUTABLE; inode->i_flags |= S_IMMUTABLE; } - if (inode->u.ext2_i.i_flags & EXT2_NOATIME_FL) { + if (ei->i_flags & EXT2_NOATIME_FL) { inode->i_attr_flags |= ATTR_FLAG_NOATIME; inode->i_flags |= S_NOATIME; } @@ -1024,6 +1031,7 @@ static int ext2_update_inode(struct inode * inode, int do_sync) { + struct ext2_inode_info *ei = ext2_i(inode); struct buffer_head * bh; struct ext2_inode * raw_inode; unsigned long block_group; @@ -1080,7 +1088,7 @@ * Fix up interoperability with old kernels. Otherwise, old inodes get * re-used with the upper 16 bits of the uid/gid intact */ - if(!inode->u.ext2_i.i_dtime) { + if(!ei->i_dtime) { raw_inode->i_uid_high = cpu_to_le16(high_16_bits(inode->i_uid)); raw_inode->i_gid_high = cpu_to_le16(high_16_bits(inode->i_gid)); } else { @@ -1099,14 +1107,14 @@ raw_inode->i_ctime = cpu_to_le32(inode->i_ctime); raw_inode->i_mtime = cpu_to_le32(inode->i_mtime); raw_inode->i_blocks = cpu_to_le32(inode->i_blocks); - raw_inode->i_dtime = cpu_to_le32(inode->u.ext2_i.i_dtime); - raw_inode->i_flags = cpu_to_le32(inode->u.ext2_i.i_flags); - raw_inode->i_faddr = cpu_to_le32(inode->u.ext2_i.i_faddr); - raw_inode->i_frag = inode->u.ext2_i.i_frag_no; - raw_inode->i_fsize = inode->u.ext2_i.i_frag_size; - raw_inode->i_file_acl = cpu_to_le32(inode->u.ext2_i.i_file_acl); + raw_inode->i_dtime = cpu_to_le32(ei->i_dtime); + raw_inode->i_flags = cpu_to_le32(ei->i_flags); + raw_inode->i_faddr = cpu_to_le32(ei->i_faddr); + raw_inode->i_frag = ei->i_frag_no; + raw_inode->i_fsize = ei->i_frag_size; + raw_inode->i_file_acl = cpu_to_le32(ei->i_file_acl); if (S_ISDIR(inode->i_mode)) - raw_inode->i_dir_acl = cpu_to_le32(inode->u.ext2_i.i_dir_acl); + raw_inode->i_dir_acl = cpu_to_le32(ei->i_dir_acl); else { raw_inode->i_size_high = cpu_to_le32(inode->i_size >> 32); if (inode->i_size > 0x7fffffffULL) { @@ -1132,7 +1140,7 @@ if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) raw_inode->i_block[0] = cpu_to_le32(kdev_t_to_nr(inode->i_rdev)); else for (block = 0; block < EXT2_N_BLOCKS; block++) - raw_inode->i_block[block] = inode->u.ext2_i.i_data[block]; + raw_inode->i_block[block] = ei->i_data[block]; mark_buffer_dirty(bh); if (do_sync) { ll_rw_block (WRITE, 1, &bh); --- ../2.4.17.clean/fs/ext2/ioctl.c Wed Sep 27 16:41:33 2000 +++ ./fs/ext2/ioctl.c Thu Dec 27 01:00:26 2001 @@ -16,13 +16,14 @@ int ext2_ioctl (struct inode * inode, struct file * filp, unsigned int cmd, unsigned long arg) { + struct ext2_inode_info *ei = ext2_i(inode); unsigned int flags; ext2_debug ("cmd = %u, arg = %lu\n", cmd, arg); switch (cmd) { case EXT2_IOC_GETFLAGS: - flags = inode->u.ext2_i.i_flags & EXT2_FL_USER_VISIBLE; + flags = ei->i_flags & EXT2_FL_USER_VISIBLE; return put_user(flags, (int *) arg); case EXT2_IOC_SETFLAGS: { unsigned int oldflags; @@ -36,7 +37,7 @@ if (get_user(flags, (int *) arg)) return -EFAULT; - oldflags = inode->u.ext2_i.i_flags; + oldflags = ei->i_flags; /* * The IMMUTABLE and APPEND_ONLY flags can only be changed by @@ -51,7 +52,7 @@ flags = flags & EXT2_FL_USER_MODIFIABLE; flags |= oldflags & ~EXT2_FL_USER_MODIFIABLE; - inode->u.ext2_i.i_flags = flags; + ei->i_flags = flags; if (flags & EXT2_SYNC_FL) inode->i_flags |= S_SYNC; --- ../2.4.17.clean/fs/ext2/namei.c Thu Oct 4 01:57:36 2001 +++ ./fs/ext2/namei.c Wed Dec 26 23:29:30 2001 @@ -134,7 +134,7 @@ if (IS_ERR(inode)) goto out; - if (l > sizeof (inode->u.ext2_i.i_data)) { + if (l > sizeof (ext2_i(inode)->i_data)) { /* slow symlink */ inode->i_op = &page_symlink_inode_operations; inode->i_mapping->a_ops = &ext2_aops; @@ -144,7 +144,7 @@ } else { /* fast symlink */ inode->i_op = &ext2_fast_symlink_inode_operations; - memcpy((char*)&inode->u.ext2_i.i_data,symname,l); + memcpy((char *) &ext2_i(inode)->i_data, symname, l); inode->i_size = l-1; } mark_inode_dirty(inode); --- ../2.4.17.clean/fs/ext2/symlink.c Wed Sep 27 16:41:33 2000 +++ ./fs/ext2/symlink.c Thu Dec 27 00:37:47 2001 @@ -22,14 +22,14 @@ static int ext2_readlink(struct dentry *dentry, char *buffer, int buflen) { - char *s = (char *)dentry->d_inode->u.ext2_i.i_data; - return vfs_readlink(dentry, buffer, buflen, s); + struct ext2_inode_info *ei = ext2_i(dentry->d_inode); + return vfs_readlink(dentry, buffer, buflen, ei->i_data); } static int ext2_follow_link(struct dentry *dentry, struct nameidata *nd) { - char *s = (char *)dentry->d_inode->u.ext2_i.i_data; - return vfs_follow_link(nd, s); + struct ext2_inode_info *ei = ext2_i(dentry->d_inode); + return vfs_follow_link(nd, ei->i_data); } struct inode_operations ext2_fast_symlink_inode_operations = { --- ../2.4.17.clean/include/linux/ext2_fs.h Thu Nov 22 14:46:52 2001 +++ ./include/linux/ext2_fs.h Wed Dec 26 23:36:07 2001 @@ -545,6 +545,11 @@ # define ATTRIB_NORET __attribute__((noreturn)) # define NORET_AND noreturn, +static inline struct ext2_inode_info *ext2_i (struct inode *inode) +{ + return (struct ext2_inode_info *) &(inode->u); +} + /* balloc.c */ extern int ext2_bg_has_super(struct super_block *sb, int group); extern unsigned long ext2_bg_num_gdb(struct super_block *sb, int group); --- ../2.4.17.clean/include/linux/fs.h Fri Dec 21 12:42:03 2001 +++ ./include/linux/fs.h Wed Dec 26 23:30:55 2001 @@ -478,7 +478,7 @@ __u32 i_generation; union { struct minix_inode_info minix_i; - struct ext2_inode_info ext2_i; + struct ext2_inode_info ext2_inode_info; struct ext3_inode_info ext3_i; struct hpfs_inode_info hpfs_i; struct ntfs_inode_info ntfs_i;
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This archive was generated by hypermail 2b29 : Mon Dec 31 2001 - 21:00:24 EST