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Diffstat (limited to 'fs/sysv')
-rw-r--r--fs/sysv/dir.c21
-rw-r--r--fs/sysv/file.c22
-rw-r--r--fs/sysv/ialloc.c1
-rw-r--r--fs/sysv/inode.c19
-rw-r--r--fs/sysv/itree.c19
-rw-r--r--fs/sysv/super.c74
-rw-r--r--fs/sysv/sysv.h4
7 files changed, 105 insertions, 55 deletions
diff --git a/fs/sysv/dir.c b/fs/sysv/dir.c
index 79941e4..a77c421 100644
--- a/fs/sysv/dir.c
+++ b/fs/sysv/dir.c
@@ -218,8 +218,7 @@ got_it:
pos = page_offset(page) +
(char*)de - (char*)page_address(page);
lock_page(page);
- err = __sysv_write_begin(NULL, page->mapping, pos, SYSV_DIRSIZE,
- AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
+ err = sysv_prepare_chunk(page, pos, SYSV_DIRSIZE);
if (err)
goto out_unlock;
memcpy (de->name, name, namelen);
@@ -239,15 +238,13 @@ out_unlock:
int sysv_delete_entry(struct sysv_dir_entry *de, struct page *page)
{
- struct address_space *mapping = page->mapping;
- struct inode *inode = (struct inode*)mapping->host;
+ struct inode *inode = page->mapping->host;
char *kaddr = (char*)page_address(page);
loff_t pos = page_offset(page) + (char *)de - kaddr;
int err;
lock_page(page);
- err = __sysv_write_begin(NULL, mapping, pos, SYSV_DIRSIZE,
- AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
+ err = sysv_prepare_chunk(page, pos, SYSV_DIRSIZE);
BUG_ON(err);
de->inode = 0;
err = dir_commit_chunk(page, pos, SYSV_DIRSIZE);
@@ -259,16 +256,14 @@ int sysv_delete_entry(struct sysv_dir_entry *de, struct page *page)
int sysv_make_empty(struct inode *inode, struct inode *dir)
{
- struct address_space *mapping = inode->i_mapping;
- struct page *page = grab_cache_page(mapping, 0);
+ struct page *page = grab_cache_page(inode->i_mapping, 0);
struct sysv_dir_entry * de;
char *base;
int err;
if (!page)
return -ENOMEM;
- err = __sysv_write_begin(NULL, mapping, 0, 2 * SYSV_DIRSIZE,
- AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
+ err = sysv_prepare_chunk(page, 0, 2 * SYSV_DIRSIZE);
if (err) {
unlock_page(page);
goto fail;
@@ -341,15 +336,13 @@ not_empty:
void sysv_set_link(struct sysv_dir_entry *de, struct page *page,
struct inode *inode)
{
- struct address_space *mapping = page->mapping;
- struct inode *dir = mapping->host;
+ struct inode *dir = page->mapping->host;
loff_t pos = page_offset(page) +
(char *)de-(char*)page_address(page);
int err;
lock_page(page);
- err = __sysv_write_begin(NULL, mapping, pos, SYSV_DIRSIZE,
- AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
+ err = sysv_prepare_chunk(page, pos, SYSV_DIRSIZE);
BUG_ON(err);
de->inode = cpu_to_fs16(SYSV_SB(inode->i_sb), inode->i_ino);
err = dir_commit_chunk(page, pos, SYSV_DIRSIZE);
diff --git a/fs/sysv/file.c b/fs/sysv/file.c
index 750cc22..0a65939 100644
--- a/fs/sysv/file.c
+++ b/fs/sysv/file.c
@@ -30,7 +30,29 @@ const struct file_operations sysv_file_operations = {
.splice_read = generic_file_splice_read,
};
+static int sysv_setattr(struct dentry *dentry, struct iattr *attr)
+{
+ struct inode *inode = dentry->d_inode;
+ int error;
+
+ error = inode_change_ok(inode, attr);
+ if (error)
+ return error;
+
+ if ((attr->ia_valid & ATTR_SIZE) &&
+ attr->ia_size != i_size_read(inode)) {
+ error = vmtruncate(inode, attr->ia_size);
+ if (error)
+ return error;
+ }
+
+ setattr_copy(inode, attr);
+ mark_inode_dirty(inode);
+ return 0;
+}
+
const struct inode_operations sysv_file_inode_operations = {
.truncate = sysv_truncate,
+ .setattr = sysv_setattr,
.getattr = sysv_getattr,
};
diff --git a/fs/sysv/ialloc.c b/fs/sysv/ialloc.c
index fcc498e..0c96c98 100644
--- a/fs/sysv/ialloc.c
+++ b/fs/sysv/ialloc.c
@@ -113,7 +113,6 @@ void sysv_free_inode(struct inode * inode)
return;
}
raw_inode = sysv_raw_inode(sb, ino, &bh);
- clear_inode(inode);
if (!raw_inode) {
printk("sysv_free_inode: unable to read inode block on device "
"%s\n", inode->i_sb->s_id);
diff --git a/fs/sysv/inode.c b/fs/sysv/inode.c
index d4a5380..de44d06 100644
--- a/fs/sysv/inode.c
+++ b/fs/sysv/inode.c
@@ -71,8 +71,8 @@ static int sysv_remount(struct super_block *sb, int *flags, char *data)
lock_super(sb);
if (sbi->s_forced_ro)
*flags |= MS_RDONLY;
- if (!(*flags & MS_RDONLY))
- sb->s_dirt = 1;
+ if (*flags & MS_RDONLY)
+ sysv_write_super(sb);
unlock_super(sb);
return 0;
}
@@ -308,12 +308,17 @@ int sysv_sync_inode(struct inode *inode)
return __sysv_write_inode(inode, 1);
}
-static void sysv_delete_inode(struct inode *inode)
+static void sysv_evict_inode(struct inode *inode)
{
truncate_inode_pages(&inode->i_data, 0);
- inode->i_size = 0;
- sysv_truncate(inode);
- sysv_free_inode(inode);
+ if (!inode->i_nlink) {
+ inode->i_size = 0;
+ sysv_truncate(inode);
+ }
+ invalidate_inode_buffers(inode);
+ end_writeback(inode);
+ if (!inode->i_nlink)
+ sysv_free_inode(inode);
}
static struct kmem_cache *sysv_inode_cachep;
@@ -344,7 +349,7 @@ const struct super_operations sysv_sops = {
.alloc_inode = sysv_alloc_inode,
.destroy_inode = sysv_destroy_inode,
.write_inode = sysv_write_inode,
- .delete_inode = sysv_delete_inode,
+ .evict_inode = sysv_evict_inode,
.put_super = sysv_put_super,
.write_super = sysv_write_super,
.sync_fs = sysv_sync_fs,
diff --git a/fs/sysv/itree.c b/fs/sysv/itree.c
index f042eec..9ca6627 100644
--- a/fs/sysv/itree.c
+++ b/fs/sysv/itree.c
@@ -459,20 +459,25 @@ static int sysv_readpage(struct file *file, struct page *page)
return block_read_full_page(page,get_block);
}
-int __sysv_write_begin(struct file *file, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
- struct page **pagep, void **fsdata)
+int sysv_prepare_chunk(struct page *page, loff_t pos, unsigned len)
{
- return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
- get_block);
+ return __block_write_begin(page, pos, len, get_block);
}
static int sysv_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
- *pagep = NULL;
- return __sysv_write_begin(file, mapping, pos, len, flags, pagep, fsdata);
+ int ret;
+
+ ret = block_write_begin(mapping, pos, len, flags, pagep, get_block);
+ if (unlikely(ret)) {
+ loff_t isize = mapping->host->i_size;
+ if (pos + len > isize)
+ vmtruncate(mapping->host, isize);
+ }
+
+ return ret;
}
static sector_t sysv_bmap(struct address_space *mapping, sector_t block)
diff --git a/fs/sysv/super.c b/fs/sysv/super.c
index 5a903da..a0b0cda 100644
--- a/fs/sysv/super.c
+++ b/fs/sysv/super.c
@@ -347,7 +347,6 @@ static int complete_read_super(struct super_block *sb, int silent, int size)
sb->s_flags |= MS_RDONLY;
if (sbi->s_truncate)
sb->s_root->d_op = &sysv_dentry_operations;
- sb->s_dirt = 1;
return 1;
}
@@ -435,12 +434,46 @@ Ebadsize:
goto failed;
}
-static int v7_fill_super(struct super_block *sb, void *data, int silent)
+static int v7_sanity_check(struct super_block *sb, struct buffer_head *bh)
{
- struct sysv_sb_info *sbi;
- struct buffer_head *bh, *bh2 = NULL;
struct v7_super_block *v7sb;
struct sysv_inode *v7i;
+ struct buffer_head *bh2;
+ struct sysv_sb_info *sbi;
+
+ sbi = sb->s_fs_info;
+
+ /* plausibility check on superblock */
+ v7sb = (struct v7_super_block *) bh->b_data;
+ if (fs16_to_cpu(sbi, v7sb->s_nfree) > V7_NICFREE ||
+ fs16_to_cpu(sbi, v7sb->s_ninode) > V7_NICINOD ||
+ fs32_to_cpu(sbi, v7sb->s_fsize) > V7_MAXSIZE)
+ return 0;
+
+ /* plausibility check on root inode: it is a directory,
+ with a nonzero size that is a multiple of 16 */
+ bh2 = sb_bread(sb, 2);
+ if (bh2 == NULL)
+ return 0;
+
+ v7i = (struct sysv_inode *)(bh2->b_data + 64);
+ if ((fs16_to_cpu(sbi, v7i->i_mode) & ~0777) != S_IFDIR ||
+ (fs32_to_cpu(sbi, v7i->i_size) == 0) ||
+ (fs32_to_cpu(sbi, v7i->i_size) & 017) ||
+ (fs32_to_cpu(sbi, v7i->i_size) > V7_NFILES *
+ sizeof(struct sysv_dir_entry))) {
+ brelse(bh2);
+ return 0;
+ }
+
+ brelse(bh2);
+ return 1;
+}
+
+static int v7_fill_super(struct super_block *sb, void *data, int silent)
+{
+ struct sysv_sb_info *sbi;
+ struct buffer_head *bh;
if (440 != sizeof (struct v7_super_block))
panic("V7 FS: bad super-block size");
@@ -454,7 +487,6 @@ static int v7_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_sb = sb;
sbi->s_block_base = 0;
sbi->s_type = FSTYPE_V7;
- sbi->s_bytesex = BYTESEX_PDP;
sb->s_fs_info = sbi;
sb_set_blocksize(sb, 512);
@@ -466,32 +498,27 @@ static int v7_fill_super(struct super_block *sb, void *data, int silent)
goto failed;
}
- /* plausibility check on superblock */
- v7sb = (struct v7_super_block *) bh->b_data;
- if (fs16_to_cpu(sbi, v7sb->s_nfree) > V7_NICFREE ||
- fs16_to_cpu(sbi, v7sb->s_ninode) > V7_NICINOD ||
- fs32_to_cpu(sbi, v7sb->s_time) == 0)
- goto failed;
+ /* Try PDP-11 UNIX */
+ sbi->s_bytesex = BYTESEX_PDP;
+ if (v7_sanity_check(sb, bh))
+ goto detected;
- /* plausibility check on root inode: it is a directory,
- with a nonzero size that is a multiple of 16 */
- if ((bh2 = sb_bread(sb, 2)) == NULL)
- goto failed;
- v7i = (struct sysv_inode *)(bh2->b_data + 64);
- if ((fs16_to_cpu(sbi, v7i->i_mode) & ~0777) != S_IFDIR ||
- (fs32_to_cpu(sbi, v7i->i_size) == 0) ||
- (fs32_to_cpu(sbi, v7i->i_size) & 017) != 0)
- goto failed;
- brelse(bh2);
- bh2 = NULL;
+ /* Try PC/IX, v7/x86 */
+ sbi->s_bytesex = BYTESEX_LE;
+ if (v7_sanity_check(sb, bh))
+ goto detected;
+ goto failed;
+
+detected:
sbi->s_bh1 = bh;
sbi->s_bh2 = bh;
if (complete_read_super(sb, silent, 1))
return 0;
failed:
- brelse(bh2);
+ printk(KERN_ERR "VFS: could not find a valid V7 on %s.\n",
+ sb->s_id);
brelse(bh);
kfree(sbi);
return -EINVAL;
@@ -560,4 +587,5 @@ static void __exit exit_sysv_fs(void)
module_init(init_sysv_fs)
module_exit(exit_sysv_fs)
+MODULE_ALIAS("v7");
MODULE_LICENSE("GPL");
diff --git a/fs/sysv/sysv.h b/fs/sysv/sysv.h
index 94cb9b4..bb55cdb 100644
--- a/fs/sysv/sysv.h
+++ b/fs/sysv/sysv.h
@@ -136,9 +136,7 @@ extern unsigned long sysv_count_free_blocks(struct super_block *);
/* itree.c */
extern void sysv_truncate(struct inode *);
-extern int __sysv_write_begin(struct file *file, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
- struct page **pagep, void **fsdata);
+extern int sysv_prepare_chunk(struct page *page, loff_t pos, unsigned len);
/* inode.c */
extern struct inode *sysv_iget(struct super_block *, unsigned int);
generated by cgit v0.10.2 at 2024-11-08 20:19:45 (GMT)