* [PATCH/RFC] minix filesystem: Update to V3
@ 2006-01-19 10:57 Daniel Aragonés
0 siblings, 0 replies; only message in thread
From: Daniel Aragonés @ 2006-01-19 10:57 UTC (permalink / raw)
To: linux-kernel
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This patch is the exact copy of the patch posted by me to comp.os.minix on January 11:
http://groups.google.com/group/comp.os.minix/browse_thread/thread/dcb26c98757137de
That post was complemented on January 14 for 2.4.x kernels:
http://groups.google.com/group/comp.os.minix/browse_thread/thread/947bd2ecefcec8f6/01d74ddca53f638a#01d74ddca53f638a
Since then, no feedback at all has come up to me. So I optimistically adhere to the principle "no news, good news", because I know that the patch works!
I submit this patch to the members of the list and kernel mantainers for their evaluation and comments, and if found appropiate, to include it into the kernel sources.
The modifications I have made to the preexistent code have been four:
1.- The layout of the superblock variables is different in version V3.
2.- Disable writings to "s_state" because it has been droped out from the superblock, and its former address is now used by another parameter.
3.- Change the references to the constant "BLOCK_SIZE" to the variables "s_blocksize" or "b_size", so allowing for multiple size blocks.
4.- Introduce the new structure "minix3_dir_entry" to cope with the padding that is needed to employ 60 characters long names in the new directory entries of 64 bytes.
Both patches follow, attached as text files: "V3_2dot6_patch.txt" and "V3_2dot4_patch.txt"
Signed-off-by: Daniel Aragones <danarag@gmail.com>
[-- Attachment #2: V3_2dot6_patch.txt --]
[-- Type: text/plain, Size: 15483 bytes --]
diff -ur orig.linux-2.6.14.5/fs/minix/bitmap.c updated.linux-2.6.14.5/fs/minix/bitmap.c
--- orig.linux-2.6.14.5/fs/minix/bitmap.c 2005-12-27 01:26:33.000000000 +0100
+++ updated.linux-2.6.14.5/fs/minix/bitmap.c 2006-01-11 19:41:41.000000000 +0100
@@ -26,14 +26,14 @@
for (i=0; i<numblocks-1; i++) {
if (!(bh=map[i]))
return(0);
- for (j=0; j<BLOCK_SIZE; j++)
+ for (j=0; j<bh->b_size; j++)
sum += nibblemap[bh->b_data[j] & 0xf]
+ nibblemap[(bh->b_data[j]>>4) & 0xf];
}
if (numblocks==0 || !(bh=map[numblocks-1]))
return(0);
- i = ((numbits-(numblocks-1)*BLOCK_SIZE*8)/16)*2;
+ i = ((numbits-(numblocks-1)*bh->b_size*8)/16)*2;
for (j=0; j<i; j++) {
sum += nibblemap[bh->b_data[j] & 0xf]
+ nibblemap[(bh->b_data[j]>>4) & 0xf];
@@ -145,15 +145,15 @@
return NULL;
}
ino--;
- block = 2 + sbi->s_imap_blocks + sbi->s_zmap_blocks +
- ino / MINIX2_INODES_PER_BLOCK;
+ block = 2 + sbi->s_imap_blocks + sbi->s_zmap_blocks +
+ ino / MINIX2_INODES_PER_BLOCK(sb->s_blocksize);
*bh = sb_bread(sb, block);
if (!*bh) {
printk("unable to read i-node block\n");
return NULL;
}
p = (void *)(*bh)->b_data;
- return p + ino % MINIX2_INODES_PER_BLOCK;
+ return p + ino % MINIX2_INODES_PER_BLOCK(sb->s_blocksize);
}
/* Clear the link count and mode of a deleted inode on disk. */
diff -ur orig.linux-2.6.14.5/fs/minix/dir.c updated.linux-2.6.14.5/fs/minix/dir.c
--- orig.linux-2.6.14.5/fs/minix/dir.c 2005-12-27 01:26:33.000000000 +0100
+++ updated.linux-2.6.14.5/fs/minix/dir.c 2006-01-11 19:41:41.000000000 +0100
@@ -4,6 +4,8 @@
* Copyright (C) 1991, 1992 Linus Torvalds
*
* minix directory handling functions
+ *
+ * Updated to filesystem version 3 by Daniel Aragones
*/
#include "minix.h"
@@ -11,6 +13,7 @@
#include <linux/smp_lock.h>
typedef struct minix_dir_entry minix_dirent;
+typedef struct minix3_dir_entry minix3_dirent;
static int minix_readdir(struct file *, void *, filldir_t);
@@ -108,14 +111,22 @@
limit = kaddr + minix_last_byte(inode, n) - chunk_size;
for ( ; p <= limit ; p = minix_next_entry(p, sbi)) {
minix_dirent *de = (minix_dirent *)p;
+ minix3_dirent *de3 = (minix3_dirent *)p;
if (de->inode) {
int over;
- unsigned l = strnlen(de->name,sbi->s_namelen);
-
- offset = p - kaddr;
- over = filldir(dirent, de->name, l,
- (n<<PAGE_CACHE_SHIFT) | offset,
- de->inode, DT_UNKNOWN);
+ if (!(sbi->s_version == MINIX_V3)) {
+ unsigned l = strnlen(de->name,sbi->s_namelen);
+ offset = p - kaddr;
+ over = filldir(dirent, de->name, l,
+ (n<<PAGE_CACHE_SHIFT) | offset,
+ de->inode, DT_UNKNOWN);
+ } else {
+ unsigned l = strnlen(de3->name,sbi->s_namelen);
+ offset = p - kaddr;
+ over = filldir(dirent, de3->name, l,
+ (n<<PAGE_CACHE_SHIFT) | offset,
+ de3->inode, DT_UNKNOWN);
+ }
if (over) {
dir_put_page(page);
goto done;
@@ -158,7 +169,7 @@
unsigned long npages = dir_pages(dir);
struct page *page = NULL;
struct minix_dir_entry *de;
-
+ struct minix3_dir_entry *de3;
*res_page = NULL;
for (n = 0; n < npages; n++) {
@@ -169,17 +180,26 @@
kaddr = (char*)page_address(page);
de = (struct minix_dir_entry *) kaddr;
+ de3 = (struct minix3_dir_entry *) kaddr;
kaddr += minix_last_byte(dir, n) - sbi->s_dirsize;
- for ( ; (char *) de <= kaddr ; de = minix_next_entry(de,sbi)) {
- if (!de->inode)
- continue;
- if (namecompare(namelen,sbi->s_namelen,name,de->name))
- goto found;
+ for ( ; (char *) de <= kaddr ;
+ de = minix_next_entry(de,sbi),
+ de3 = minix_next_entry(de3,sbi)) {
+ if (!(sbi->s_version == MINIX_V3)) {
+ if (!de->inode)
+ continue;
+ if (namecompare(namelen,sbi->s_namelen,name,de->name))
+ goto found;
+ } else {
+ if (!de3->inode)
+ continue;
+ if (namecompare(namelen,sbi->s_namelen,name,de3->name))
+ goto found;
+ }
}
dir_put_page(page);
}
return NULL;
-
found:
*res_page = page;
return de;
@@ -194,6 +214,7 @@
struct minix_sb_info * sbi = minix_sb(sb);
struct page *page = NULL;
struct minix_dir_entry * de;
+ struct minix3_dir_entry * de3;
unsigned long npages = dir_pages(dir);
unsigned long n;
char *kaddr;
@@ -216,6 +237,7 @@
kaddr = (char*)page_address(page);
dir_end = kaddr + minix_last_byte(dir, n);
de = (minix_dirent *)kaddr;
+ de3 = (minix3_dirent *)kaddr;
kaddr += PAGE_CACHE_SIZE - sbi->s_dirsize;
while ((char *)de <= kaddr) {
if ((char *)de == dir_end) {
@@ -226,9 +248,16 @@
if (!de->inode)
goto got_it;
err = -EEXIST;
- if (namecompare(namelen,sbi->s_namelen,name,de->name))
- goto out_unlock;
- de = minix_next_entry(de, sbi);
+ if (!(sbi->s_version == MINIX_V3)) {
+ if (namecompare(namelen,sbi->s_namelen,name,de->name))
+ goto out_unlock;
+ de = minix_next_entry(de, sbi);
+ } else {
+ if (namecompare(namelen,sbi->s_namelen,name,de3->name))
+ goto out_unlock;
+ de = minix_next_entry(de, sbi);
+ de3 = minix_next_entry(de3, sbi);
+ }
}
unlock_page(page);
dir_put_page(page);
@@ -242,9 +271,15 @@
err = page->mapping->a_ops->prepare_write(NULL, page, from, to);
if (err)
goto out_unlock;
- memcpy (de->name, name, namelen);
- memset (de->name + namelen, 0, sbi->s_dirsize - namelen - 2);
- de->inode = inode->i_ino;
+ if (!(sbi->s_version == MINIX_V3)) {
+ memcpy (de->name, name, namelen);
+ memset (de->name + namelen, 0, sbi->s_dirsize - namelen - 2);
+ de->inode = inode->i_ino;
+ } else {
+ memcpy (de3->name, name, namelen);
+ memset (de3->name + namelen, 0, sbi->s_dirsize - namelen - 4);
+ de3->inode = inode->i_ino;
+ }
err = dir_commit_chunk(page, from, to);
dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(dir);
@@ -286,6 +321,7 @@
struct page *page = grab_cache_page(mapping, 0);
struct minix_sb_info * sbi = minix_sb(inode->i_sb);
struct minix_dir_entry * de;
+ struct minix3_dir_entry * de3;
char *kaddr;
int err;
@@ -301,11 +337,13 @@
memset(kaddr, 0, PAGE_CACHE_SIZE);
de = (struct minix_dir_entry *)kaddr;
- de->inode = inode->i_ino;
- strcpy(de->name,".");
+ de3 = (struct minix3_dir_entry *)kaddr;
+ de->inode = de3->inode = inode->i_ino;
+ (sbi->s_version == MINIX_V3) ? strcpy(de3->name,".") : strcpy(de->name,".");
de = minix_next_entry(de, sbi);
- de->inode = dir->i_ino;
- strcpy(de->name,"..");
+ de3 = minix_next_entry(de3, sbi);
+ de->inode = de3->inode = dir->i_ino;
+ (sbi->s_version == MINIX_V3) ? strcpy(de3->name,"..") : strcpy(de->name,"..");
kunmap_atomic(kaddr, KM_USER0);
err = dir_commit_chunk(page, 0, 2 * sbi->s_dirsize);
@@ -326,27 +364,42 @@
for (i = 0; i < npages; i++) {
char *kaddr;
minix_dirent * de;
+ minix3_dirent * de3 = NULL;
page = dir_get_page(inode, i);
if (IS_ERR(page))
continue;
kaddr = (char *)page_address(page);
+ if (sbi->s_version == MINIX_V3)
+ de3 = (minix3_dirent *)kaddr;
de = (minix_dirent *)kaddr;
kaddr += minix_last_byte(inode, i) - sbi->s_dirsize;
while ((char *)de <= kaddr) {
if (de->inode != 0) {
/* check for . and .. */
- if (de->name[0] != '.')
- goto not_empty;
- if (!de->name[1]) {
- if (de->inode != inode->i_ino)
+ if (!(sbi->s_version == MINIX_V3)) {
+ if (de->name[0] != '.')
+ goto not_empty;
+ if (!de->name[1]) {
+ if (de->inode != inode->i_ino)
+ goto not_empty;
+ } else if (de->name[1] != '.')
+ goto not_empty;
+ else if (de->name[2])
+ goto not_empty;
+ } else {
+ if (de3->name[0] != '.')
goto not_empty;
- } else if (de->name[1] != '.')
- goto not_empty;
- else if (de->name[2])
- goto not_empty;
+ if (!de3->name[1]) {
+ if (de3->inode != inode->i_ino)
+ goto not_empty;
+ } else if (de3->name[1] != '.')
+ goto not_empty;
+ else if (de3->name[2])
+ goto not_empty;
+ }
}
de = minix_next_entry(de, sbi);
}
diff -ur orig.linux-2.6.14.5/fs/minix/inode.c updated.linux-2.6.14.5/fs/minix/inode.c
--- orig.linux-2.6.14.5/fs/minix/inode.c 2005-12-27 01:26:33.000000000 +0100
+++ updated.linux-2.6.14.5/fs/minix/inode.c 2006-01-11 19:41:41.000000000 +0100
@@ -7,6 +7,7 @@
* Minix V2 fs support.
*
* Modified for 680x0 by Andreas Schwab
+ * Updated to filesystem version 3 by Daniel Aragones
*/
#include <linux/module.h>
@@ -36,7 +37,8 @@
struct minix_sb_info *sbi = minix_sb(sb);
if (!(sb->s_flags & MS_RDONLY)) {
- sbi->s_ms->s_state = sbi->s_mount_state;
+ if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */
+ sbi->s_ms->s_state = sbi->s_mount_state;
mark_buffer_dirty(sbi->s_sbh);
}
for (i = 0; i < sbi->s_imap_blocks; i++)
@@ -117,21 +119,23 @@
!(sbi->s_mount_state & MINIX_VALID_FS))
return 0;
/* Mounting a rw partition read-only. */
- ms->s_state = sbi->s_mount_state;
+ if (sbi->s_version != MINIX_V3)
+ ms->s_state = sbi->s_mount_state;
mark_buffer_dirty(sbi->s_sbh);
} else {
/* Mount a partition which is read-only, read-write. */
sbi->s_mount_state = ms->s_state;
- ms->s_state &= ~MINIX_VALID_FS;
+ if (sbi->s_version != MINIX_V3)
+ ms->s_state &= ~MINIX_VALID_FS;
mark_buffer_dirty(sbi->s_sbh);
- if (!(sbi->s_mount_state & MINIX_VALID_FS))
- printk ("MINIX-fs warning: remounting unchecked fs, "
- "running fsck is recommended.\n");
- else if ((sbi->s_mount_state & MINIX_ERROR_FS))
- printk ("MINIX-fs warning: remounting fs with errors, "
- "running fsck is recommended.\n");
- }
+ if (!(sbi->s_mount_state & MINIX_VALID_FS) && (sbi->s_version != MINIX_V3))
+ printk ("MINIX-fs warning: remounting unchecked Minix filesystem V%i, "
+ "running fsck is recommended.\n", sbi->s_version);
+ else if ((sbi->s_mount_state & MINIX_ERROR_FS) && (sbi->s_version != MINIX_V3))
+ printk ("MINIX-fs warning: remounting Minix filesystem V%i with errors, "
+ "running fsck is recommended.\n", sbi->s_version);
+ }
return 0;
}
@@ -197,6 +201,23 @@
sbi->s_dirsize = 32;
sbi->s_namelen = 30;
sbi->s_link_max = MINIX2_LINK_MAX;
+ } else if ( *(__u16 *)(bh->b_data + 24) == MINIX3_SUPER_MAGIC) {
+
+ s->s_magic = MINIX3_SUPER_MAGIC;
+ sbi->s_imap_blocks = *(__u16 *)(bh->b_data + 6);
+ sbi->s_zmap_blocks = *(__u16 *)(bh->b_data + 8);
+ sbi->s_firstdatazone = *(__u16 *)(bh->b_data + 10);
+ sbi->s_log_zone_size = *(__u16 *)(bh->b_data + 12);
+ sbi->s_max_size = *(__u32 *)(bh->b_data + 16);
+ sbi->s_nzones = *(__u32 *)(bh->b_data + 20);
+ sbi->s_dirsize = 64;
+ sbi->s_namelen = 60;
+ sbi->s_version = MINIX_V3;
+ sbi->s_link_max = MINIX2_LINK_MAX;
+ if ( *(__u16 *)(bh->b_data + 28) != 1024) {
+ if (!sb_set_blocksize(s,( *(__u16 *)(bh->b_data + 28))))
+ goto out_bad_hblock;
+ }
} else
goto out_no_fs;
@@ -240,15 +261,16 @@
s->s_root->d_op = &minix_dentry_operations;
if (!(s->s_flags & MS_RDONLY)) {
- ms->s_state &= ~MINIX_VALID_FS;
+ if(sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */
+ ms->s_state &= ~MINIX_VALID_FS;
mark_buffer_dirty(bh);
}
- if (!(sbi->s_mount_state & MINIX_VALID_FS))
- printk ("MINIX-fs: mounting unchecked file system, "
- "running fsck is recommended.\n");
- else if (sbi->s_mount_state & MINIX_ERROR_FS)
- printk ("MINIX-fs: mounting file system with errors, "
- "running fsck is recommended.\n");
+ if (!(sbi->s_mount_state & MINIX_VALID_FS) && (sbi->s_version != MINIX_V3))
+ printk ("MINIX-fs: mounting unchecked Minix filesystem V%i, "
+ "running fsck is recommended.\n", sbi->s_version);
+ else if ((sbi->s_mount_state & MINIX_ERROR_FS) && (sbi->s_version != MINIX_V3))
+ printk ("MINIX-fs: mounting Minix filesystem V%i with errors, "
+ "running fsck is recommended.\n", sbi->s_version);
return 0;
out_iput:
@@ -277,8 +299,8 @@
out_no_fs:
if (!silent)
- printk("VFS: Can't find a Minix or Minix V2 filesystem on device "
- "%s.\n", s->s_id);
+ printk("VFS: Can't find a Minix filesystem V1 | V2 | V3 on device "
+ "%s.\n", s->s_id);
out_release:
brelse(bh);
goto out;
@@ -536,12 +558,14 @@
int minix_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
{
+ struct inode * dir = dentry->d_parent->d_inode;
+ struct super_block * sb = dir->i_sb;
generic_fillattr(dentry->d_inode, stat);
if (INODE_VERSION(dentry->d_inode) == MINIX_V1)
stat->blocks = (BLOCK_SIZE / 512) * V1_minix_blocks(stat->size);
else
- stat->blocks = (BLOCK_SIZE / 512) * V2_minix_blocks(stat->size);
- stat->blksize = BLOCK_SIZE;
+ stat->blocks = (sb->s_blocksize / 512) * V2_minix_blocks(stat->size);
+ stat->blksize = sb->s_blocksize;
return 0;
}
diff -ur orig.linux-2.6.14.5/fs/minix/itree_common.c updated.linux-2.6.14.5/fs/minix/itree_common.c
--- orig.linux-2.6.14.5/fs/minix/itree_common.c 2005-12-27 01:26:33.000000000 +0100
+++ updated.linux-2.6.14.5/fs/minix/itree_common.c 2006-01-11 19:41:41.000000000 +0100
@@ -23,7 +23,7 @@
static inline block_t *block_end(struct buffer_head *bh)
{
- return (block_t *)((char*)bh->b_data + BLOCK_SIZE);
+ return (block_t *)((char*)bh->b_data + bh->b_size);
}
static inline Indirect *get_branch(struct inode *inode,
@@ -85,7 +85,7 @@
branch[n].key = cpu_to_block(nr);
bh = sb_getblk(inode->i_sb, parent);
lock_buffer(bh);
- memset(bh->b_data, 0, BLOCK_SIZE);
+ memset(bh->b_data, 0, bh->b_size);
branch[n].bh = bh;
branch[n].p = (block_t*) bh->b_data + offsets[n];
*branch[n].p = branch[n].key;
@@ -292,6 +292,7 @@
static inline void truncate (struct inode * inode)
{
+ struct super_block * sb = inode->i_sb;
block_t *idata = i_data(inode);
int offsets[DEPTH];
Indirect chain[DEPTH];
@@ -301,7 +302,7 @@
int first_whole;
long iblock;
- iblock = (inode->i_size + BLOCK_SIZE-1) >> 10;
+ iblock = (inode->i_size + sb->s_blocksize -1) >> 10;
block_truncate_page(inode->i_mapping, inode->i_size, get_block);
n = block_to_path(inode, iblock, offsets);
diff -ur orig.linux-2.6.14.5/fs/minix/minix.h updated.linux-2.6.14.5/fs/minix/minix.h
--- orig.linux-2.6.14.5/fs/minix/minix.h 2005-12-27 01:26:33.000000000 +0100
+++ updated.linux-2.6.14.5/fs/minix/minix.h 2006-01-11 19:41:41.000000000 +0100
@@ -12,6 +12,7 @@
#define MINIX_V1 0x0001 /* original minix fs */
#define MINIX_V2 0x0002 /* minix V2 fs */
+#define MINIX_V3 0x0003 /* minix V3 fs */
/*
* minix fs inode data in memory
diff -ur orig.linux-2.6.14.5/include/linux/minix_fs.h updated.linux-2.6.14.5/include/linux/minix_fs.h
--- orig.linux-2.6.14.5/include/linux/minix_fs.h 2005-12-27 01:26:33.000000000 +0100
+++ updated.linux-2.6.14.5/include/linux/minix_fs.h 2006-01-11 19:41:41.000000000 +0100
@@ -23,11 +23,12 @@
#define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
#define MINIX2_SUPER_MAGIC 0x2468 /* minix V2 fs */
#define MINIX2_SUPER_MAGIC2 0x2478 /* minix V2 fs, 30 char names */
+#define MINIX3_SUPER_MAGIC 0x4d5a /* minix V3 fs */
#define MINIX_VALID_FS 0x0001 /* Clean fs. */
#define MINIX_ERROR_FS 0x0002 /* fs has errors. */
#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
-#define MINIX2_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix2_inode)))
+#define MINIX2_INODES_PER_BLOCK(b) ((b)/(sizeof (struct minix2_inode)))
/*
* This is the original minix inode layout on disk.
@@ -82,4 +83,9 @@
char name[0];
};
+struct minix3_dir_entry {
+ __u16 inode;
+ __u16 padding;
+ char name[0];
+};
#endif
[-- Attachment #3: V3_2dot4_patch.txt --]
[-- Type: text/plain, Size: 15468 bytes --]
diff -ur orig.linux-2.4.32/fs/minix/bitmap.c updated.linux-2.4.32/fs/minix/bitmap.c
--- orig.linux-2.4.32/fs/minix/bitmap.c 2002-02-25 20:38:09.000000000 +0100
+++ updated.linux-2.4.32/fs/minix/bitmap.c 2006-01-14 20:57:54.000000000 +0100
@@ -27,14 +27,14 @@
for (i=0; i<numblocks-1; i++) {
if (!(bh=map[i]))
return(0);
- for (j=0; j<BLOCK_SIZE; j++)
+ for (j=0; j<bh->b_size; j++)
sum += nibblemap[bh->b_data[j] & 0xf]
+ nibblemap[(bh->b_data[j]>>4) & 0xf];
}
if (numblocks==0 || !(bh=map[numblocks-1]))
return(0);
- i = ((numbits-(numblocks-1)*BLOCK_SIZE*8)/16)*2;
+ i = ((numbits-(numblocks-1)*bh->b_size*8)/16)*2;
for (j=0; j<i; j++) {
sum += nibblemap[bh->b_data[j] & 0xf]
+ nibblemap[(bh->b_data[j]>>4) & 0xf];
@@ -157,14 +157,14 @@
}
ino--;
block = 2 + sbi->s_imap_blocks + sbi->s_zmap_blocks +
- ino / MINIX2_INODES_PER_BLOCK;
+ ino / MINIX2_INODES_PER_BLOCK(sb->s_blocksize);
*bh = sb_bread(sb, block);
if (!*bh) {
printk("unable to read i-node block\n");
return NULL;
}
p = (void *)(*bh)->b_data;
- return p + ino % MINIX2_INODES_PER_BLOCK;
+ return p + ino % MINIX2_INODES_PER_BLOCK(sb->s_blocksize);
}
/* Clear the link count and mode of a deleted inode on disk. */
diff -ur orig.linux-2.4.32/fs/minix/dir.c updated.linux-2.4.32/fs/minix/dir.c
--- orig.linux-2.4.32/fs/minix/dir.c 2002-02-25 20:38:09.000000000 +0100
+++ updated.linux-2.4.32/fs/minix/dir.c 2006-01-14 20:57:54.000000000 +0100
@@ -4,6 +4,9 @@
* Copyright (C) 1991, 1992 Linus Torvalds
*
* minix directory handling functions
+ *
+ * Updated to filesystem version 3 by Daniel Aragones
+ *
*/
#include <linux/fs.h>
@@ -11,6 +14,7 @@
#include <linux/pagemap.h>
typedef struct minix_dir_entry minix_dirent;
+typedef struct minix3_dir_entry minix3_dirent;
static int minix_readdir(struct file *, void *, filldir_t);
@@ -95,14 +99,22 @@
limit = kaddr + PAGE_CACHE_SIZE - chunk_size;
for ( ; p <= limit ; p = minix_next_entry(p, sbi)) {
minix_dirent *de = (minix_dirent *)p;
+ minix3_dirent *de3 = (minix3_dirent *)p;
if (de->inode) {
int over;
- unsigned l = strnlen(de->name,sbi->s_namelen);
-
- offset = p - kaddr;
- over = filldir(dirent, de->name, l,
- (n<<PAGE_CACHE_SHIFT) | offset,
- de->inode, DT_UNKNOWN);
+ if (!(sbi->s_version == MINIX_V3)) {
+ unsigned l = strnlen(de->name,sbi->s_namelen);
+ offset = p - kaddr;
+ over = filldir(dirent, de->name, l,
+ (n<<PAGE_CACHE_SHIFT) | offset,
+ de->inode, DT_UNKNOWN);
+ } else {
+ unsigned l = strnlen(de3->name,sbi->s_namelen);
+ offset = p - kaddr;
+ over = filldir(dirent, de3->name, l,
+ (n<<PAGE_CACHE_SHIFT) | offset,
+ de3->inode, DT_UNKNOWN);
+ }
if (over) {
dir_put_page(page);
goto done;
@@ -145,7 +157,7 @@
unsigned long npages = dir_pages(dir);
struct page *page = NULL;
struct minix_dir_entry *de;
-
+ struct minix3_dir_entry *de3;
*res_page = NULL;
for (n = 0; n < npages; n++) {
@@ -156,12 +168,22 @@
kaddr = (char*)page_address(page);
de = (struct minix_dir_entry *) kaddr;
+ de3 = (struct minix3_dir_entry *) kaddr;
kaddr += PAGE_CACHE_SIZE - sbi->s_dirsize;
- for ( ; (char *) de <= kaddr ; de = minix_next_entry(de,sbi)) {
- if (!de->inode)
- continue;
- if (namecompare(namelen,sbi->s_namelen,name,de->name))
- goto found;
+ for ( ; (char *) de <= kaddr ;
+ de = minix_next_entry(de,sbi),
+ de3 = minix_next_entry(de3,sbi)) {
+ if (!(sbi->s_version == MINIX_V3)) {
+ if (!de->inode)
+ continue;
+ if (namecompare(namelen,sbi->s_namelen,name,de->name))
+ goto found;
+ } else {
+ if (!de3->inode)
+ continue;
+ if (namecompare(namelen,sbi->s_namelen,name,de3->name))
+ goto found;
+ }
}
dir_put_page(page);
}
@@ -181,6 +203,7 @@
struct minix_sb_info * sbi = &sb->u.minix_sb;
struct page *page = NULL;
struct minix_dir_entry * de;
+ struct minix3_dir_entry * de3;
unsigned long npages = dir_pages(dir);
unsigned long n;
char *kaddr;
@@ -195,14 +218,22 @@
goto out;
kaddr = (char*)page_address(page);
de = (minix_dirent *)kaddr;
+ de3 = (minix3_dirent *)kaddr;
kaddr += PAGE_CACHE_SIZE - sbi->s_dirsize;
while ((char *)de <= kaddr) {
if (!de->inode)
goto got_it;
err = -EEXIST;
- if (namecompare(namelen,sbi->s_namelen,name,de->name))
- goto out_page;
- de = minix_next_entry(de, sbi);
+ if (!(sbi->s_version == MINIX_V3)) {
+ if (namecompare(namelen,sbi->s_namelen,name,de->name))
+ goto out_page;
+ de = minix_next_entry(de, sbi);
+ } else {
+ if (namecompare(namelen,sbi->s_namelen,name,de3->name))
+ goto out_unlock;
+ de = minix_next_entry(de, sbi);
+ de3 = minix_next_entry(de3, sbi);
+ }
}
dir_put_page(page);
}
@@ -216,9 +247,15 @@
err = page->mapping->a_ops->prepare_write(NULL, page, from, to);
if (err)
goto out_unlock;
- memcpy (de->name, name, namelen);
- memset (de->name + namelen, 0, sbi->s_dirsize - namelen - 2);
- de->inode = inode->i_ino;
+ if (!(sbi->s_version == MINIX_V3)) {
+ memcpy (de->name, name, namelen);
+ memset (de->name + namelen, 0, sbi->s_dirsize - namelen - 2);
+ de->inode = inode->i_ino;
+ } else {
+ memcpy (de3->name, name, namelen);
+ memset (de3->name + namelen, 0, sbi->s_dirsize - namelen - 4);
+ de3->inode = inode->i_ino;
+ }
err = dir_commit_chunk(page, from, to);
dir->i_mtime = dir->i_ctime = CURRENT_TIME;
mark_inode_dirty(dir);
@@ -258,6 +295,7 @@
struct page *page = grab_cache_page(mapping, 0);
struct minix_sb_info * sbi = &inode->i_sb->u.minix_sb;
struct minix_dir_entry * de;
+ struct minix3_dir_entry * de3;
char *base;
int err;
@@ -269,13 +307,14 @@
base = (char*)page_address(page);
memset(base, 0, PAGE_CACHE_SIZE);
-
- de = (struct minix_dir_entry *) base;
- de->inode = inode->i_ino;
- strcpy(de->name,".");
+ de = (struct minix_dir_entry *)base;
+ de3 = (struct minix3_dir_entry *)base;
+ de->inode = de3->inode = inode->i_ino;
+ (sbi->s_version == MINIX_V3) ? strcpy(de3->name,".") : strcpy(de->name,".");
de = minix_next_entry(de, sbi);
- de->inode = dir->i_ino;
- strcpy(de->name,"..");
+ de3 = minix_next_entry(de3, sbi);
+ de->inode = de3->inode = dir->i_ino;
+ (sbi->s_version == MINIX_V3) ? strcpy(de3->name,"..") : strcpy(de->name,"..");
err = dir_commit_chunk(page, 0, 2 * sbi->s_dirsize);
fail:
@@ -296,27 +335,42 @@
for (i = 0; i < npages; i++) {
char *kaddr;
minix_dirent * de;
+ minix3_dirent * de3 = NULL;
page = dir_get_page(inode, i);
if (IS_ERR(page))
continue;
kaddr = (char *)page_address(page);
+ if (sbi->s_version == MINIX_V3)
+ de3 = (minix3_dirent *)kaddr;
de = (minix_dirent *)kaddr;
kaddr += PAGE_CACHE_SIZE - sbi->s_dirsize;
while ((char *)de <= kaddr) {
if (de->inode != 0) {
/* check for . and .. */
- if (de->name[0] != '.')
- goto not_empty;
- if (!de->name[1]) {
- if (de->inode != inode->i_ino)
+ if (!(sbi->s_version == MINIX_V3)) {
+ if (de->name[0] != '.')
+ goto not_empty;
+ if (!de->name[1]) {
+ if (de->inode != inode->i_ino)
+ goto not_empty;
+ } else if (de->name[1] != '.')
+ goto not_empty;
+ else if (de->name[2])
goto not_empty;
- } else if (de->name[1] != '.')
- goto not_empty;
- else if (de->name[2])
- goto not_empty;
+ } else {
+ if (de3->name[0] != '.')
+ goto not_empty;
+ if (!de3->name[1]) {
+ if (de3->inode != inode->i_ino)
+ goto not_empty;
+ } else if (de3->name[1] != '.')
+ goto not_empty;
+ else if (de3->name[2])
+ goto not_empty;
+ }
}
de = minix_next_entry(de, sbi);
}
diff -ur orig.linux-2.4.32/fs/minix/inode.c updated.linux-2.4.32/fs/minix/inode.c
--- orig.linux-2.4.32/fs/minix/inode.c 2003-11-28 19:26:21.000000000 +0100
+++ updated.linux-2.4.32/fs/minix/inode.c 2006-01-14 20:57:55.000000000 +0100
@@ -7,6 +7,7 @@
* Minix V2 fs support.
*
* Modified for 680x0 by Andreas Schwab
+ * Updated to filesystem version 3 by Daniel Aragones
*/
#include <linux/module.h>
@@ -28,7 +29,7 @@
static void minix_delete_inode(struct inode *inode)
{
lock_kernel();
-
+ truncate_inode_pages(&inode->i_data, 0);
inode->i_size = 0;
minix_truncate(inode);
minix_free_inode(inode);
@@ -45,23 +46,24 @@
static void minix_write_super(struct super_block * sb)
{
struct minix_super_block * ms;
+ struct minix_sb_info *sbi = &sb->u.minix_sb;
if (!(sb->s_flags & MS_RDONLY)) {
ms = sb->u.minix_sb.s_ms;
-
- if (ms->s_state & MINIX_VALID_FS)
- ms->s_state &= ~MINIX_VALID_FS;
- minix_commit_super(sb);
+ if (sbi->s_version != MINIX_V3) { /* s_state is out from V3 sb */
+ if (ms->s_state & MINIX_VALID_FS)
+ ms->s_state &= ~MINIX_VALID_FS;
+ minix_commit_super(sb);
+ }
}
sb->s_dirt = 0;
}
-
static void minix_put_super(struct super_block *sb)
{
int i;
-
- if (!(sb->s_flags & MS_RDONLY)) {
+ struct minix_sb_info *sbi = &sb->u.minix_sb;
+ if (!(sb->s_flags & MS_RDONLY) && (sbi->s_version != MINIX_V3)) {
sb->u.minix_sb.s_ms->s_state = sb->u.minix_sb.s_mount_state;
mark_buffer_dirty(sb->u.minix_sb.s_sbh);
}
@@ -88,11 +90,12 @@
static int minix_remount (struct super_block * sb, int * flags, char * data)
{
struct minix_super_block * ms;
+ struct minix_sb_info *sbi = &sb->u.minix_sb;
ms = sb->u.minix_sb.s_ms;
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
return 0;
- if (*flags & MS_RDONLY) {
+ if ((*flags & MS_RDONLY) && (sbi->s_version != MINIX_V3)){
if (ms->s_state & MINIX_VALID_FS ||
!(sb->u.minix_sb.s_mount_state & MINIX_VALID_FS))
return 0;
@@ -102,20 +105,21 @@
sb->s_dirt = 1;
minix_commit_super(sb);
}
- else {
+ else if (sbi->s_version != MINIX_V3){
/* Mount a partition which is read-only, read-write. */
sb->u.minix_sb.s_mount_state = ms->s_state;
ms->s_state &= ~MINIX_VALID_FS;
mark_buffer_dirty(sb->u.minix_sb.s_sbh);
sb->s_dirt = 1;
+ }
+
+ if (!(sb->u.minix_sb.s_mount_state & MINIX_VALID_FS) && (sbi->s_version != MINIX_V3))
+ printk ("MINIX-fs warning: remounting unchecked Minix filesystem V%i, "
+ "running fsck is recommended.\n", sbi->s_version);
+ else if ((sb->u.minix_sb.s_mount_state & MINIX_ERROR_FS) && (sbi->s_version != MINIX_V3))
+ printk ("MINIX-fs warning: remounting Minix filesystem V%i with errors, "
+ "running fsck is recommended.\n", sbi->s_version);
- if (!(sb->u.minix_sb.s_mount_state & MINIX_VALID_FS))
- printk ("MINIX-fs warning: remounting unchecked fs, "
- "running fsck is recommended.\n");
- else if ((sb->u.minix_sb.s_mount_state & MINIX_ERROR_FS))
- printk ("MINIX-fs warning: remounting fs with errors, "
- "running fsck is recommended.\n");
- }
return 0;
}
@@ -182,6 +186,23 @@
sbi->s_dirsize = 32;
sbi->s_namelen = 30;
sbi->s_link_max = MINIX2_LINK_MAX;
+ } else if ( *(__u16 *)(bh->b_data + 24) == MINIX3_SUPER_MAGIC) {
+
+ s->s_magic = MINIX3_SUPER_MAGIC;
+ sbi->s_imap_blocks = *(__u16 *)(bh->b_data + 6);
+ sbi->s_zmap_blocks = *(__u16 *)(bh->b_data + 8);
+ sbi->s_firstdatazone = *(__u16 *)(bh->b_data + 10);
+ sbi->s_log_zone_size = *(__u16 *)(bh->b_data + 12);
+ sbi->s_max_size = *(__u32 *)(bh->b_data + 16);
+ sbi->s_nzones = *(__u32 *)(bh->b_data + 20);
+ sbi->s_dirsize = 64;
+ sbi->s_namelen = 60;
+ sbi->s_version = MINIX_V3;
+ sbi->s_link_max = MINIX2_LINK_MAX;
+ if ( *(__u16 *)(bh->b_data + 28) != 1024) {
+ if (!sb_set_blocksize(s,( *(__u16 *)(bh->b_data + 28))))
+ goto out_bad_hblock;
+ }
} else
goto out_no_fs;
@@ -224,17 +245,17 @@
if (!NO_TRUNCATE)
s->s_root->d_op = &minix_dentry_operations;
- if (!(s->s_flags & MS_RDONLY)) {
- ms->s_state &= ~MINIX_VALID_FS;
+ if (!(s->s_flags & MS_RDONLY) && (sbi->s_version != MINIX_V3)) {
+ ms->s_state &= ~MINIX_VALID_FS; /* s_state is out from V3 sb */
mark_buffer_dirty(bh);
s->s_dirt = 1;
}
- if (!(sbi->s_mount_state & MINIX_VALID_FS))
- printk ("MINIX-fs: mounting unchecked file system, "
- "running fsck is recommended.\n");
- else if (sbi->s_mount_state & MINIX_ERROR_FS)
- printk ("MINIX-fs: mounting file system with errors, "
- "running fsck is recommended.\n");
+ if (!(sbi->s_mount_state & MINIX_VALID_FS) && (sbi->s_version != MINIX_V3))
+ printk ("MINIX-fs: mounting unchecked Minix filesystem V%i, "
+ "running fsck is recommended.\n", sbi->s_version);
+ else if ((sbi->s_mount_state & MINIX_ERROR_FS) && (sbi->s_version != MINIX_V3))
+ printk ("MINIX-fs: mounting Minix filesystem V%i with errors, "
+ "running fsck is recommended.\n", sbi->s_version);
return s;
out_iput:
@@ -263,7 +284,7 @@
out_no_fs:
if (!silent)
- printk("VFS: Can't find a Minix or Minix V2 filesystem on device "
+ printk("VFS: Can't find a Minix filesystem V1 | V2 | V3 on device "
"%s.\n", kdevname(dev));
out_release:
brelse(bh);
diff -ur orig.linux-2.4.32/fs/minix/itree_common.c updated.linux-2.4.32/fs/minix/itree_common.c
--- orig.linux-2.4.32/fs/minix/itree_common.c 2002-02-25 20:38:09.000000000 +0100
+++ updated.linux-2.4.32/fs/minix/itree_common.c 2006-01-14 20:57:54.000000000 +0100
@@ -21,7 +21,7 @@
static inline block_t *block_end(struct buffer_head *bh)
{
- return (block_t *)((char*)bh->b_data + BLOCK_SIZE);
+ return (block_t *)((char*)bh->b_data + bh->b_size);
}
static inline Indirect *get_branch(struct inode *inode,
@@ -81,7 +81,7 @@
branch[n].key = cpu_to_block(nr);
bh = sb_getblk(inode->i_sb, parent);
lock_buffer(bh);
- memset(bh->b_data, 0, BLOCK_SIZE);
+ memset(bh->b_data, 0, bh->b_size);
branch[n].bh = bh;
branch[n].p = (block_t*) bh->b_data + offsets[n];
*branch[n].p = branch[n].key;
@@ -292,6 +292,7 @@
static inline void truncate (struct inode * inode)
{
+ struct super_block * sb = inode->i_sb;
block_t *idata = i_data(inode);
int offsets[DEPTH];
Indirect chain[DEPTH];
@@ -301,7 +302,7 @@
int first_whole;
long iblock;
- iblock = (inode->i_size + BLOCK_SIZE-1) >> 10;
+ iblock = (inode->i_size + sb->s_blocksize -1) >> 10;
block_truncate_page(inode->i_mapping, inode->i_size, get_block);
n = block_to_path(inode, iblock, offsets);
diff -ur orig.linux-2.4.32/include/linux/minix_fs.h updated.linux-2.4.32/include/linux/minix_fs.h
--- orig.linux-2.4.32/include/linux/minix_fs.h 2001-09-07 18:45:51.000000000 +0200
+++ updated.linux-2.4.32/include/linux/minix_fs.h 2006-01-14 20:57:55.000000000 +0100
@@ -23,14 +23,16 @@
#define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
#define MINIX2_SUPER_MAGIC 0x2468 /* minix V2 fs */
#define MINIX2_SUPER_MAGIC2 0x2478 /* minix V2 fs, 30 char names */
+#define MINIX3_SUPER_MAGIC 0x4d5a /* minix V3 fs */
#define MINIX_VALID_FS 0x0001 /* Clean fs. */
#define MINIX_ERROR_FS 0x0002 /* fs has errors. */
#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
-#define MINIX2_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix2_inode)))
+#define MINIX2_INODES_PER_BLOCK(b) ((b)/(sizeof (struct minix2_inode)))
#define MINIX_V1 0x0001 /* original minix fs */
#define MINIX_V2 0x0002 /* minix V2 fs */
+#define MINIX_V3 0x0003 /* minix V3 fs */
#define INODE_VERSION(inode) inode->i_sb->u.minix_sb.s_version
@@ -87,6 +89,12 @@
char name[0];
};
+struct minix3_dir_entry {
+ __u16 inode;
+ __u16 padding;
+ char name[0];
+};
+
#ifdef __KERNEL__
/*
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2006-01-19 10:57 [PATCH/RFC] minix filesystem: Update to V3 Daniel Aragonés
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