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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:20:36 +0200 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:20:36 +0200 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/bad_inode.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'fs/bad_inode.c')
-rw-r--r-- | fs/bad_inode.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/fs/bad_inode.c b/fs/bad_inode.c new file mode 100644 index 000000000000..672a31924f3c --- /dev/null +++ b/fs/bad_inode.c @@ -0,0 +1,123 @@ +/* + * linux/fs/bad_inode.c + * + * Copyright (C) 1997, Stephen Tweedie + * + * Provide stub functions for unreadable inodes + * + * Fabian Frederick : August 2003 - All file operations assigned to EIO + */ + +#include <linux/fs.h> +#include <linux/module.h> +#include <linux/stat.h> +#include <linux/time.h> +#include <linux/smp_lock.h> +#include <linux/namei.h> + +static int return_EIO(void) +{ + return -EIO; +} + +#define EIO_ERROR ((void *) (return_EIO)) + +static struct file_operations bad_file_ops = +{ + .llseek = EIO_ERROR, + .aio_read = EIO_ERROR, + .read = EIO_ERROR, + .write = EIO_ERROR, + .aio_write = EIO_ERROR, + .readdir = EIO_ERROR, + .poll = EIO_ERROR, + .ioctl = EIO_ERROR, + .mmap = EIO_ERROR, + .open = EIO_ERROR, + .flush = EIO_ERROR, + .release = EIO_ERROR, + .fsync = EIO_ERROR, + .aio_fsync = EIO_ERROR, + .fasync = EIO_ERROR, + .lock = EIO_ERROR, + .readv = EIO_ERROR, + .writev = EIO_ERROR, + .sendfile = EIO_ERROR, + .sendpage = EIO_ERROR, + .get_unmapped_area = EIO_ERROR, +}; + +struct inode_operations bad_inode_ops = +{ + .create = EIO_ERROR, + .lookup = EIO_ERROR, + .link = EIO_ERROR, + .unlink = EIO_ERROR, + .symlink = EIO_ERROR, + .mkdir = EIO_ERROR, + .rmdir = EIO_ERROR, + .mknod = EIO_ERROR, + .rename = EIO_ERROR, + .readlink = EIO_ERROR, + /* follow_link must be no-op, otherwise unmounting this inode + won't work */ + .truncate = EIO_ERROR, + .permission = EIO_ERROR, + .getattr = EIO_ERROR, + .setattr = EIO_ERROR, + .setxattr = EIO_ERROR, + .getxattr = EIO_ERROR, + .listxattr = EIO_ERROR, + .removexattr = EIO_ERROR, +}; + + +/* + * When a filesystem is unable to read an inode due to an I/O error in + * its read_inode() function, it can call make_bad_inode() to return a + * set of stubs which will return EIO errors as required. + * + * We only need to do limited initialisation: all other fields are + * preinitialised to zero automatically. + */ + +/** + * make_bad_inode - mark an inode bad due to an I/O error + * @inode: Inode to mark bad + * + * When an inode cannot be read due to a media or remote network + * failure this function makes the inode "bad" and causes I/O operations + * on it to fail from this point on. + */ + +void make_bad_inode(struct inode * inode) +{ + remove_inode_hash(inode); + + inode->i_mode = S_IFREG; + inode->i_atime = inode->i_mtime = inode->i_ctime = + current_fs_time(inode->i_sb); + inode->i_op = &bad_inode_ops; + inode->i_fop = &bad_file_ops; +} +EXPORT_SYMBOL(make_bad_inode); + +/* + * This tests whether an inode has been flagged as bad. The test uses + * &bad_inode_ops to cover the case of invalidated inodes as well as + * those created by make_bad_inode() above. + */ + +/** + * is_bad_inode - is an inode errored + * @inode: inode to test + * + * Returns true if the inode in question has been marked as bad. + */ + +int is_bad_inode(struct inode * inode) +{ + return (inode->i_op == &bad_inode_ops); +} + +EXPORT_SYMBOL(is_bad_inode); |