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author | Joel Becker <joel.becker@oracle.com> | 2008-11-13 14:49:11 -0800 |
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committer | Mark Fasheh <mfasheh@suse.com> | 2009-01-05 08:36:52 -0800 |
commit | b657c95c11088d77fc1bfc9c84d940f778bf9d12 (patch) | |
tree | 7e52e73aabbdbc55f644ad26735edc25a652ac32 /fs/ocfs2/dlmglue.c | |
parent | a68979b857283daf4acc405e476dcc8812a3ff2b (diff) | |
download | kernel_samsung_smdk4412-b657c95c11088d77fc1bfc9c84d940f778bf9d12.zip kernel_samsung_smdk4412-b657c95c11088d77fc1bfc9c84d940f778bf9d12.tar.gz kernel_samsung_smdk4412-b657c95c11088d77fc1bfc9c84d940f778bf9d12.tar.bz2 |
ocfs2: Wrap inode block reads in a dedicated function.
The ocfs2 code currently reads inodes off disk with a simple
ocfs2_read_block() call. Each place that does this has a different set
of sanity checks it performs. Some check only the signature. A couple
validate the block number (the block read vs di->i_blkno). A couple
others check for VALID_FL. Only one place validates i_fs_generation. A
couple check nothing. Even when an error is found, they don't all do
the same thing.
We wrap inode reading into ocfs2_read_inode_block(). This will validate
all the above fields, going readonly if they are invalid (they never
should be). ocfs2_read_inode_block_full() is provided for the places
that want to pass read_block flags. Every caller is passing a struct
inode with a valid ip_blkno, so we don't need a separate blkno argument
either.
We will remove the validation checks from the rest of the code in a
later commit, as they are no longer necessary.
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Diffstat (limited to 'fs/ocfs2/dlmglue.c')
-rw-r--r-- | fs/ocfs2/dlmglue.c | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c index 6e6cc0a..9f2a7f7 100644 --- a/fs/ocfs2/dlmglue.c +++ b/fs/ocfs2/dlmglue.c @@ -2024,7 +2024,7 @@ static int ocfs2_inode_lock_update(struct inode *inode, } else { /* Boo, we have to go to disk. */ /* read bh, cast, ocfs2_refresh_inode */ - status = ocfs2_read_block(inode, oi->ip_blkno, bh); + status = ocfs2_read_inode_block(inode, bh); if (status < 0) { mlog_errno(status); goto bail_refresh; @@ -2032,18 +2032,14 @@ static int ocfs2_inode_lock_update(struct inode *inode, fe = (struct ocfs2_dinode *) (*bh)->b_data; /* This is a good chance to make sure we're not - * locking an invalid object. + * locking an invalid object. ocfs2_read_inode_block() + * already checked that the inode block is sane. * * We bug on a stale inode here because we checked * above whether it was wiped from disk. The wiping * node provides a guarantee that we receive that * message and can mark the inode before dropping any * locks associated with it. */ - if (!OCFS2_IS_VALID_DINODE(fe)) { - OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe); - status = -EIO; - goto bail_refresh; - } mlog_bug_on_msg(inode->i_generation != le32_to_cpu(fe->i_generation), "Invalid dinode %llu disk generation: %u " @@ -2085,7 +2081,7 @@ static int ocfs2_assign_bh(struct inode *inode, return 0; } - status = ocfs2_read_block(inode, OCFS2_I(inode)->ip_blkno, ret_bh); + status = ocfs2_read_inode_block(inode, ret_bh); if (status < 0) mlog_errno(status); |