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Registered in England and Wales under Company Registration No. 3798903 From: David Howells Subject: [PATCH 21/31] IGET: Stop JFS from using iget() and read_inode() [try #3] To: hch@infradead.org, viro@ftp.linux.org.uk, torvalds@osdl.org, akpm@osdl.org Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, dhowells@redhat.com Date: Wed, 10 Oct 2007 22:44:55 +0100 Message-ID: <20071010214455.17535.55075.stgit@warthog.procyon.org.uk> In-Reply-To: <20071010214308.17535.5406.stgit@warthog.procyon.org.uk> References: <20071010214308.17535.5406.stgit@warthog.procyon.org.uk> User-Agent: StGIT/0.13 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5614 Lines: 194 Stop the JFS filesystem from using iget() and read_inode(). Replace jfs_read_inode() with jfs_iget(), and call that instead of iget(). jfs_iget() then uses iget_locked() directly and returns a proper error code instead of an inode in the event of an error. jfs_fill_super() returns any error incurred when getting the root inode instead of EINVAL. Signed-off-by: David Howells Acked-by: Dave Kleikamp --- fs/jfs/inode.c | 20 ++++++++++++++++---- fs/jfs/jfs_inode.h | 2 +- fs/jfs/namei.c | 34 ++++++++++++++-------------------- fs/jfs/super.c | 15 +++++++++------ 4 files changed, 40 insertions(+), 31 deletions(-) diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c index 3467dde..5081e76 100644 --- a/fs/jfs/inode.c +++ b/fs/jfs/inode.c @@ -31,11 +31,21 @@ #include "jfs_debug.h" -void jfs_read_inode(struct inode *inode) +struct inode *jfs_iget(struct super_block *sb, unsigned long ino) { - if (diRead(inode)) { - make_bad_inode(inode); - return; + struct inode *inode; + int ret; + + inode = iget_locked(sb, ino); + if (!inode) + return ERR_PTR(-ENOMEM); + if (!(inode->i_state & I_NEW)) + return inode; + + ret = diRead(inode); + if (ret < 0) { + iget_failed(inode); + return ERR_PTR(ret); } if (S_ISREG(inode->i_mode)) { @@ -55,6 +65,8 @@ void jfs_read_inode(struct inode *inode) inode->i_op = &jfs_file_inode_operations; init_special_inode(inode, inode->i_mode, inode->i_rdev); } + unlock_new_inode(inode); + return inode; } /* diff --git a/fs/jfs/jfs_inode.h b/fs/jfs/jfs_inode.h index f0ec72b..71ea106 100644 --- a/fs/jfs/jfs_inode.h +++ b/fs/jfs/jfs_inode.h @@ -22,7 +22,7 @@ extern struct inode *ialloc(struct inode *, umode_t); extern int jfs_fsync(struct file *, struct dentry *, int); extern int jfs_ioctl(struct inode *, struct file *, unsigned int, unsigned long); -extern void jfs_read_inode(struct inode *); +extern struct inode *jfs_iget(struct super_block *, unsigned long); extern int jfs_commit_inode(struct inode *, int); extern int jfs_write_inode(struct inode*, int); extern void jfs_delete_inode(struct inode *); diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c index 932797b..6915a3d 100644 --- a/fs/jfs/namei.c +++ b/fs/jfs/namei.c @@ -1461,12 +1461,10 @@ static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, struc } } - ip = iget(dip->i_sb, inum); - if (ip == NULL || is_bad_inode(ip)) { + ip = jfs_iget(dip->i_sb, inum); + if (IS_ERR(ip)) { jfs_err("jfs_lookup: iget failed on inum %d", (uint) inum); - if (ip) - iput(ip); - return ERR_PTR(-EACCES); + return ERR_CAST(ip); } dentry = d_splice_alias(ip, dentry); @@ -1487,12 +1485,11 @@ struct dentry *jfs_get_dentry(struct super_block *sb, void *vobjp) if (ino == 0) return ERR_PTR(-ESTALE); - inode = iget(sb, ino); - if (inode == NULL) - return ERR_PTR(-ENOMEM); + inode = jfs_iget(sb, ino); + if (IS_ERR(inode)) + return ERR_CAST(inode); - if (is_bad_inode(inode) || - (generation && inode->i_generation != generation)) { + if (generation && inode->i_generation != generation) { result = ERR_PTR(-ESTALE); goto out_iput; } @@ -1518,17 +1515,14 @@ struct dentry *jfs_get_parent(struct dentry *dentry) parent_ino = le32_to_cpu(JFS_IP(dentry->d_inode)->i_dtroot.header.idotdot); - inode = iget(sb, parent_ino); - if (inode) { - if (is_bad_inode(inode)) { + inode = jfs_iget(sb, parent_ino); + if (IS_ERR(inode)) { + parent = ERR_CAST(inode); + } else { + parent = d_alloc_anon(inode); + if (!parent) { + parent = ERR_PTR(-ENOMEM); iput(inode); - parent = ERR_PTR(-EACCES); - } else { - parent = d_alloc_anon(inode); - if (!parent) { - parent = ERR_PTR(-ENOMEM); - iput(inode); - } } } diff --git a/fs/jfs/super.c b/fs/jfs/super.c index 4b372f5..f499634 100644 --- a/fs/jfs/super.c +++ b/fs/jfs/super.c @@ -414,7 +414,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent) struct inode *inode; int rc; s64 newLVSize = 0; - int flag; + int flag, ret = -EINVAL; jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags); @@ -461,8 +461,10 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent) * Initialize direct-mapping inode/address-space */ inode = new_inode(sb); - if (inode == NULL) + if (inode == NULL) { + ret = -ENOMEM; goto out_kfree; + } inode->i_ino = 0; inode->i_nlink = 1; inode->i_size = sb->s_bdev->bd_inode->i_size; @@ -494,9 +496,11 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent) sb->s_magic = JFS_SUPER_MAGIC; - inode = iget(sb, ROOT_I); - if (!inode || is_bad_inode(inode)) + inode = jfs_iget(sb, ROOT_I); + if (IS_ERR(inode)) { + ret = PTR_ERR(inode); goto out_no_root; + } sb->s_root = d_alloc_root(inode); if (!sb->s_root) goto out_no_root; @@ -536,7 +540,7 @@ out_kfree: if (sbi->nls_tab) unload_nls(sbi->nls_tab); kfree(sbi); - return -EINVAL; + return ret; } static void jfs_write_super_lockfs(struct super_block *sb) @@ -720,7 +724,6 @@ out: static const struct super_operations jfs_super_operations = { .alloc_inode = jfs_alloc_inode, .destroy_inode = jfs_destroy_inode, - .read_inode = jfs_read_inode, .dirty_inode = jfs_dirty_inode, .write_inode = jfs_write_inode, .delete_inode = jfs_delete_inode, - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/