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[PATCH] ext3: cleanups and WARN_ON()
- Clean up a few little layout things and comments. - Add a WARN_ON to a case which I was wondering about. - Tune up some inlines. Cc: Mingming Cao <cmm@us.ibm.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andrew Morton
Linus Torvalds
parent
1d8fa7a2b9
commit
d6859bfca8
175
fs/ext3/inode.c
175
fs/ext3/inode.c
@ -44,16 +44,16 @@ static int ext3_writepage_trans_blocks(struct inode *inode);
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/*
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* Test whether an inode is a fast symlink.
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*/
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static inline int ext3_inode_is_fast_symlink(struct inode *inode)
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static int ext3_inode_is_fast_symlink(struct inode *inode)
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{
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int ea_blocks = EXT3_I(inode)->i_file_acl ?
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(inode->i_sb->s_blocksize >> 9) : 0;
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return (S_ISLNK(inode->i_mode) &&
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inode->i_blocks - ea_blocks == 0);
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return (S_ISLNK(inode->i_mode) && inode->i_blocks - ea_blocks == 0);
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}
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/* The ext3 forget function must perform a revoke if we are freeing data
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/*
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* The ext3 forget function must perform a revoke if we are freeing data
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* which has been journaled. Metadata (eg. indirect blocks) must be
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* revoked in all cases.
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*
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@ -61,10 +61,8 @@ static inline int ext3_inode_is_fast_symlink(struct inode *inode)
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* but there may still be a record of it in the journal, and that record
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* still needs to be revoked.
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*/
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int ext3_forget(handle_t *handle, int is_metadata,
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struct inode *inode, struct buffer_head *bh,
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int blocknr)
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int ext3_forget(handle_t *handle, int is_metadata, struct inode *inode,
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struct buffer_head *bh, int blocknr)
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{
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int err;
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@ -104,10 +102,9 @@ int ext3_forget(handle_t *handle, int is_metadata,
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}
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/*
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* Work out how many blocks we need to progress with the next chunk of a
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* Work out how many blocks we need to proceed with the next chunk of a
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* truncate transaction.
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*/
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static unsigned long blocks_for_truncate(struct inode *inode)
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{
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unsigned long needed;
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@ -141,7 +138,6 @@ static unsigned long blocks_for_truncate(struct inode *inode)
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* extend fails, we need to propagate the failure up and restart the
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* transaction in the top-level truncate loop. --sct
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*/
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static handle_t *start_transaction(struct inode *inode)
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{
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handle_t *result;
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@ -194,9 +190,11 @@ void ext3_delete_inode (struct inode * inode)
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handle = start_transaction(inode);
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if (IS_ERR(handle)) {
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/* If we're going to skip the normal cleanup, we still
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* need to make sure that the in-core orphan linked list
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* is properly cleaned up. */
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/*
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* If we're going to skip the normal cleanup, we still need to
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* make sure that the in-core orphan linked list is properly
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* cleaned up.
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*/
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ext3_orphan_del(NULL, inode);
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goto no_delete;
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}
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@ -247,7 +245,7 @@ static inline void add_chain(Indirect *p, struct buffer_head *bh, __le32 *v)
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p->bh = bh;
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}
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static inline int verify_chain(Indirect *from, Indirect *to)
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static int verify_chain(Indirect *from, Indirect *to)
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{
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while (from <= to && from->key == *from->p)
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from++;
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@ -317,7 +315,7 @@ static int ext3_block_to_path(struct inode *inode,
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offsets[n++] = i_block & (ptrs - 1);
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final = ptrs;
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} else {
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ext3_warning (inode->i_sb, "ext3_block_to_path", "block > big");
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ext3_warning(inode->i_sb, "ext3_block_to_path", "block > big");
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}
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if (boundary)
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*boundary = final - 1 - (i_block & (ptrs - 1));
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@ -409,7 +407,6 @@ no_block:
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*
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* Caller must make sure that @ind is valid and will stay that way.
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*/
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static unsigned long ext3_find_near(struct inode *inode, Indirect *ind)
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{
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struct ext3_inode_info *ei = EXT3_I(inode);
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@ -419,17 +416,18 @@ static unsigned long ext3_find_near(struct inode *inode, Indirect *ind)
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unsigned long colour;
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/* Try to find previous block */
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for (p = ind->p - 1; p >= start; p--)
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for (p = ind->p - 1; p >= start; p--) {
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if (*p)
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return le32_to_cpu(*p);
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}
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/* No such thing, so let's try location of indirect block */
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if (ind->bh)
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return ind->bh->b_blocknr;
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/*
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* It is going to be refered from inode itself? OK, just put it into
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* the same cylinder group then.
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* It is going to be referred to from the inode itself? OK, just put it
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* into the same cylinder group then.
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*/
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bg_start = (ei->i_block_group * EXT3_BLOCKS_PER_GROUP(inode->i_sb)) +
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le32_to_cpu(EXT3_SB(inode->i_sb)->s_es->s_first_data_block);
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@ -453,7 +451,9 @@ static unsigned long ext3_find_near(struct inode *inode, Indirect *ind)
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static unsigned long ext3_find_goal(struct inode *inode, long block,
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Indirect chain[4], Indirect *partial)
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{
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struct ext3_block_alloc_info *block_i = EXT3_I(inode)->i_block_alloc_info;
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struct ext3_block_alloc_info *block_i;
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block_i = EXT3_I(inode)->i_block_alloc_info;
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/*
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* try the heuristic for sequential allocation,
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@ -466,6 +466,7 @@ static unsigned long ext3_find_goal(struct inode *inode, long block,
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return ext3_find_near(inode, partial);
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}
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/**
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* ext3_blks_to_allocate: Look up the block map and count the number
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* of direct blocks need to be allocated for the given branch.
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@ -478,8 +479,7 @@ static unsigned long ext3_find_goal(struct inode *inode, long block,
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* return the total number of blocks to be allocate, including the
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* direct and indirect blocks.
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*/
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static int
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ext3_blks_to_allocate(Indirect * branch, int k, unsigned long blks,
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static int ext3_blks_to_allocate(Indirect *branch, int k, unsigned long blks,
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int blocks_to_boundary)
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{
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unsigned long count = 0;
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@ -489,7 +489,7 @@ ext3_blks_to_allocate(Indirect * branch, int k, unsigned long blks,
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* then it's clear blocks on that path have not allocated
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*/
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if (k > 0) {
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/* right now don't hanel cross boundary allocation */
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/* right now we don't handle cross boundary allocation */
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if (blks < blocks_to_boundary + 1)
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count += blks;
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else
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@ -538,7 +538,7 @@ static int ext3_alloc_blocks(handle_t *handle, struct inode *inode,
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while (1) {
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count = target;
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/* allocating blocks for indirect blocks and direct blocks */
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current_block = ext3_new_blocks(handle, inode, goal, &count, err);
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current_block = ext3_new_blocks(handle,inode,goal,&count,err);
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if (*err)
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goto failed_out;
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@ -591,7 +591,6 @@ failed_out:
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* ext3_alloc_block() (normally -ENOSPC). Otherwise we set the chain
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* as described above and return 0.
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*/
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static int ext3_alloc_branch(handle_t *handle, struct inode *inode,
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int indirect_blks, int *blks, unsigned long goal,
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int *offsets, Indirect *branch)
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@ -683,14 +682,15 @@ failed:
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* inode (->i_blocks, etc.). In case of success we end up with the full
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* chain to new block and return 0.
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*/
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static int ext3_splice_branch(handle_t *handle, struct inode *inode, long block,
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Indirect *where, int num, int blks)
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static int ext3_splice_branch(handle_t *handle, struct inode *inode,
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long block, Indirect *where, int num, int blks)
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{
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int i;
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int err = 0;
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struct ext3_block_alloc_info *block_i = EXT3_I(inode)->i_block_alloc_info;
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struct ext3_block_alloc_info *block_i;
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unsigned long current_block;
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block_i = EXT3_I(inode)->i_block_alloc_info;
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/*
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* If we're splicing into a [td]indirect block (as opposed to the
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* inode) then we need to get write access to the [td]indirect block
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@ -705,8 +705,11 @@ static int ext3_splice_branch(handle_t *handle, struct inode *inode, long block,
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/* That's it */
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*where->p = where->key;
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/* update host bufferhead or inode to point to
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* more just allocated direct blocks blocks */
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/*
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* Update the host buffer_head or inode to point to more just allocated
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* direct blocks blocks
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*/
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if (num == 0 && blks > 1) {
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current_block = le32_to_cpu(where->key + 1);
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for (i = 1; i < blks; i++)
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@ -720,7 +723,8 @@ static int ext3_splice_branch(handle_t *handle, struct inode *inode, long block,
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*/
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if (block_i) {
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block_i->last_alloc_logical_block = block + blks - 1;
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block_i->last_alloc_physical_block = le32_to_cpu(where[num].key + blks - 1);
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block_i->last_alloc_physical_block =
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le32_to_cpu(where[num].key + blks - 1);
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}
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/* We are done with atomic stuff, now do the rest of housekeeping */
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@ -731,7 +735,7 @@ static int ext3_splice_branch(handle_t *handle, struct inode *inode, long block,
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/* had we spliced it onto indirect block? */
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if (where->bh) {
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/*
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* akpm: If we spliced it onto an indirect block, we haven't
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* If we spliced it onto an indirect block, we haven't
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* altered the inode. Note however that if it is being spliced
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* onto an indirect block at the very end of the file (the
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* file is growing) then we *will* alter the inode to reflect
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@ -756,7 +760,7 @@ err_out:
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for (i = 1; i <= num; i++) {
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BUFFER_TRACE(where[i].bh, "call journal_forget");
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ext3_journal_forget(handle, where[i].bh);
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ext3_free_blocks(handle, inode, le32_to_cpu(where[i-1].key), 1);
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ext3_free_blocks(handle,inode,le32_to_cpu(where[i-1].key),1);
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}
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ext3_free_blocks(handle, inode, le32_to_cpu(where[num].key), blks);
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@ -775,17 +779,16 @@ err_out:
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* allocations is needed - we simply release blocks and do not touch anything
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* reachable from inode.
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*
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* akpm: `handle' can be NULL if create == 0.
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* `handle' can be NULL if create == 0.
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*
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* The BKL may not be held on entry here. Be sure to take it early.
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* return > 0, # of blocks mapped or allocated.
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* return = 0, if plain lookup failed.
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* return < 0, error case.
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*/
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int
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ext3_get_blocks_handle(handle_t *handle, struct inode *inode, sector_t iblock,
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unsigned long maxblocks, struct buffer_head *bh_result,
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int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
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sector_t iblock, unsigned long maxblocks,
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struct buffer_head *bh_result,
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int create, int extend_disksize)
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{
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int err = -EIO;
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@ -802,7 +805,7 @@ ext3_get_blocks_handle(handle_t *handle, struct inode *inode, sector_t iblock,
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J_ASSERT(handle != NULL || create == 0);
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depth = ext3_block_to_path(inode, iblock, offsets, &blocks_to_boundary);
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depth = ext3_block_to_path(inode,iblock,offsets,&blocks_to_boundary);
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if (depth == 0)
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goto out;
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@ -998,8 +1001,8 @@ static int ext3_get_block(struct inode *inode, sector_t iblock,
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/*
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* `handle' can be NULL if create is zero
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*/
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struct buffer_head *ext3_getblk(handle_t *handle, struct inode * inode,
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long block, int create, int * errp)
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struct buffer_head *ext3_getblk(handle_t *handle, struct inode *inode,
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long block, int create, int *errp)
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{
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struct buffer_head dummy;
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int fatal = 0, err;
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@ -1029,17 +1032,18 @@ struct buffer_head *ext3_getblk(handle_t *handle, struct inode * inode,
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J_ASSERT(create != 0);
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J_ASSERT(handle != 0);
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/* Now that we do not always journal data, we
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should keep in mind whether this should
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always journal the new buffer as metadata.
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For now, regular file writes use
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ext3_get_block instead, so it's not a
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problem. */
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/*
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* Now that we do not always journal data, we should
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* keep in mind whether this should always journal the
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* new buffer as metadata. For now, regular file
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* writes use ext3_get_block instead, so it's not a
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* problem.
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*/
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lock_buffer(bh);
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BUFFER_TRACE(bh, "call get_create_access");
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fatal = ext3_journal_get_create_access(handle, bh);
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if (!fatal && !buffer_uptodate(bh)) {
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memset(bh->b_data, 0, inode->i_sb->s_blocksize);
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memset(bh->b_data,0,inode->i_sb->s_blocksize);
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set_buffer_uptodate(bh);
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}
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unlock_buffer(bh);
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@ -1061,7 +1065,7 @@ err:
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return NULL;
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}
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struct buffer_head *ext3_bread(handle_t *handle, struct inode * inode,
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struct buffer_head *ext3_bread(handle_t *handle, struct inode *inode,
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int block, int create, int *err)
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{
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struct buffer_head * bh;
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@ -1137,7 +1141,6 @@ static int walk_page_buffers( handle_t *handle,
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* is elevated. We'll still have enough credits for the tiny quotafile
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* write.
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*/
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static int do_journal_get_write_access(handle_t *handle,
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struct buffer_head *bh)
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{
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@ -1180,8 +1183,7 @@ out:
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return ret;
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}
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int
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ext3_journal_dirty_data(handle_t *handle, struct buffer_head *bh)
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int ext3_journal_dirty_data(handle_t *handle, struct buffer_head *bh)
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{
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int err = journal_dirty_data(handle, bh);
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if (err)
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@ -1206,7 +1208,6 @@ static int commit_write_fn(handle_t *handle, struct buffer_head *bh)
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* ext3 never places buffers on inode->i_mapping->private_list. metadata
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* buffers are managed internally.
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*/
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static int ext3_ordered_commit_write(struct file *file, struct page *page,
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unsigned from, unsigned to)
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{
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@ -1907,11 +1908,8 @@ static inline int all_zeroes(__le32 *p, __le32 *q)
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* c) free the subtrees growing from the inode past the @chain[0].
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* (no partially truncated stuff there). */
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static Indirect *ext3_find_shared(struct inode *inode,
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int depth,
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int offsets[4],
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Indirect chain[4],
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__le32 *top)
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static Indirect *ext3_find_shared(struct inode *inode, int depth,
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int offsets[4], Indirect chain[4], __le32 *top)
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{
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Indirect *partial, *p;
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int k, err;
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@ -1950,8 +1948,7 @@ static Indirect *ext3_find_shared(struct inode *inode,
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}
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/* Writer: end */
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while(partial > p)
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{
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while(partial > p) {
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brelse(partial->bh);
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partial--;
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}
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@ -1967,10 +1964,9 @@ no_top:
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* We release `count' blocks on disk, but (last - first) may be greater
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* than `count' because there can be holes in there.
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*/
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static void
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ext3_clear_blocks(handle_t *handle, struct inode *inode, struct buffer_head *bh,
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unsigned long block_to_free, unsigned long count,
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__le32 *first, __le32 *last)
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static void ext3_clear_blocks(handle_t *handle, struct inode *inode,
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struct buffer_head *bh, unsigned long block_to_free,
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unsigned long count, __le32 *first, __le32 *last)
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{
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__le32 *p;
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if (try_to_extend_transaction(handle, inode)) {
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@ -2231,8 +2227,7 @@ static void ext3_free_branches(handle_t *handle, struct inode *inode,
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* that's fine - as long as they are linked from the inode, the post-crash
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* ext3_truncate() run will find them and release them.
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*/
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void ext3_truncate(struct inode * inode)
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void ext3_truncate(struct inode *inode)
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{
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handle_t *handle;
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struct ext3_inode_info *ei = EXT3_I(inode);
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@ -2359,22 +2354,19 @@ do_indirects:
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default:
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nr = i_data[EXT3_IND_BLOCK];
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if (nr) {
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ext3_free_branches(handle, inode, NULL,
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&nr, &nr+1, 1);
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ext3_free_branches(handle, inode, NULL, &nr, &nr+1, 1);
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i_data[EXT3_IND_BLOCK] = 0;
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}
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case EXT3_IND_BLOCK:
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nr = i_data[EXT3_DIND_BLOCK];
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if (nr) {
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ext3_free_branches(handle, inode, NULL,
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&nr, &nr+1, 2);
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ext3_free_branches(handle, inode, NULL, &nr, &nr+1, 2);
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i_data[EXT3_DIND_BLOCK] = 0;
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}
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case EXT3_DIND_BLOCK:
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nr = i_data[EXT3_TIND_BLOCK];
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if (nr) {
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ext3_free_branches(handle, inode, NULL,
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&nr, &nr+1, 3);
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ext3_free_branches(handle, inode, NULL, &nr, &nr+1, 3);
|
||||
i_data[EXT3_TIND_BLOCK] = 0;
|
||||
}
|
||||
case EXT3_TIND_BLOCK:
|
||||
@ -2387,8 +2379,10 @@ do_indirects:
|
||||
inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
|
||||
ext3_mark_inode_dirty(handle, inode);
|
||||
|
||||
/* In a multi-transaction truncate, we only make the final
|
||||
* transaction synchronous */
|
||||
/*
|
||||
* In a multi-transaction truncate, we only make the final transaction
|
||||
* synchronous
|
||||
*/
|
||||
if (IS_SYNC(inode))
|
||||
handle->h_sync = 1;
|
||||
out_stop:
|
||||
@ -2414,20 +2408,16 @@ static unsigned long ext3_get_inode_block(struct super_block *sb,
|
||||
struct ext3_group_desc * gdp;
|
||||
|
||||
|
||||
if ((ino != EXT3_ROOT_INO &&
|
||||
ino != EXT3_JOURNAL_INO &&
|
||||
ino != EXT3_RESIZE_INO &&
|
||||
ino < EXT3_FIRST_INO(sb)) ||
|
||||
ino > le32_to_cpu(
|
||||
EXT3_SB(sb)->s_es->s_inodes_count)) {
|
||||
ext3_error (sb, "ext3_get_inode_block",
|
||||
if ((ino != EXT3_ROOT_INO && ino != EXT3_JOURNAL_INO &&
|
||||
ino != EXT3_RESIZE_INO && ino < EXT3_FIRST_INO(sb)) ||
|
||||
ino > le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count)) {
|
||||
ext3_error(sb, "ext3_get_inode_block",
|
||||
"bad inode number: %lu", ino);
|
||||
return 0;
|
||||
}
|
||||
block_group = (ino - 1) / EXT3_INODES_PER_GROUP(sb);
|
||||
if (block_group >= EXT3_SB(sb)->s_groups_count) {
|
||||
ext3_error (sb, "ext3_get_inode_block",
|
||||
"group >= groups count");
|
||||
ext3_error(sb,"ext3_get_inode_block","group >= groups count");
|
||||
return 0;
|
||||
}
|
||||
smp_rmb();
|
||||
@ -2440,7 +2430,7 @@ static unsigned long ext3_get_inode_block(struct super_block *sb,
|
||||
return 0;
|
||||
}
|
||||
|
||||
gdp = (struct ext3_group_desc *) bh->b_data;
|
||||
gdp = (struct ext3_group_desc *)bh->b_data;
|
||||
/*
|
||||
* Figure out the offset within the block group inode table
|
||||
*/
|
||||
@ -2989,7 +2979,7 @@ err_out:
|
||||
|
||||
|
||||
/*
|
||||
* akpm: how many blocks doth make a writepage()?
|
||||
* How many blocks doth make a writepage()?
|
||||
*
|
||||
* With N blocks per page, it may be:
|
||||
* N data blocks
|
||||
@ -3079,8 +3069,8 @@ ext3_reserve_inode_write(handle_t *handle, struct inode *inode,
|
||||
}
|
||||
|
||||
/*
|
||||
* akpm: What we do here is to mark the in-core inode as clean
|
||||
* with respect to inode dirtiness (it may still be data-dirty).
|
||||
* What we do here is to mark the in-core inode as clean with respect to inode
|
||||
* dirtiness (it may still be data-dirty).
|
||||
* This means that the in-core inode may be reaped by prune_icache
|
||||
* without having to perform any I/O. This is a very good thing,
|
||||
* because *any* task may call prune_icache - even ones which
|
||||
@ -3112,7 +3102,7 @@ int ext3_mark_inode_dirty(handle_t *handle, struct inode *inode)
|
||||
}
|
||||
|
||||
/*
|
||||
* akpm: ext3_dirty_inode() is called from __mark_inode_dirty()
|
||||
* ext3_dirty_inode() is called from __mark_inode_dirty()
|
||||
*
|
||||
* We're really interested in the case where a file is being extended.
|
||||
* i_size has been changed by generic_commit_write() and we thus need
|
||||
@ -3148,7 +3138,7 @@ out:
|
||||
return;
|
||||
}
|
||||
|
||||
#ifdef AKPM
|
||||
#if 0
|
||||
/*
|
||||
* Bind an inode's backing buffer_head into this transaction, to prevent
|
||||
* it from being flushed to disk early. Unlike
|
||||
@ -3156,8 +3146,7 @@ out:
|
||||
* returns no iloc structure, so the caller needs to repeat the iloc
|
||||
* lookup to mark the inode dirty later.
|
||||
*/
|
||||
static inline int
|
||||
ext3_pin_inode(handle_t *handle, struct inode *inode)
|
||||
static int ext3_pin_inode(handle_t *handle, struct inode *inode)
|
||||
{
|
||||
struct ext3_iloc iloc;
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user