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| author | Alexey Dobriyan <adobriyan@gmail.com> | 2009-12-15 16:46:51 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-16 07:20:06 -0800 |
| commit | f3e2a520f5fb1a1df033efd9c2e5eadb384aad9b (patch) | |
| tree | da8272b8fc8aa7bb1d0d039bf0e13b4b9609a4b7 /fs/ufs | |
| parent | 080497079c0bad05133fb8d1dee300bd9e6354ec (diff) | |
| download | kernel-common-f3e2a520f5fb1a1df033efd9c2e5eadb384aad9b.tar.gz kernel-common-f3e2a520f5fb1a1df033efd9c2e5eadb384aad9b.tar.bz2 kernel-common-f3e2a520f5fb1a1df033efd9c2e5eadb384aad9b.zip | |
ufs: NFS support
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Evgeniy Dushistov <dushistov@mail.ru>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ufs')
| -rw-r--r-- | fs/ufs/super.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/fs/ufs/super.c b/fs/ufs/super.c index 5faed7954d0a..143c20bfb04b 100644 --- a/fs/ufs/super.c +++ b/fs/ufs/super.c @@ -66,6 +66,7 @@ */ +#include <linux/exportfs.h> #include <linux/module.h> #include <linux/bitops.h> @@ -96,6 +97,56 @@ #include "swab.h" #include "util.h" +static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation) +{ + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + struct inode *inode; + + if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg) + return ERR_PTR(-ESTALE); + + inode = ufs_iget(sb, ino); + if (IS_ERR(inode)) + return ERR_CAST(inode); + if (generation && inode->i_generation != generation) { + iput(inode); + return ERR_PTR(-ESTALE); + } + return inode; +} + +static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type) +{ + return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); +} + +static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type) +{ + return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); +} + +static struct dentry *ufs_get_parent(struct dentry *child) +{ + struct qstr dot_dot = { + .name = "..", + .len = 2, + }; + ino_t ino; + + ino = ufs_inode_by_name(child->d_inode, &dot_dot); + if (!ino) + return ERR_PTR(-ENOENT); + return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino)); +} + +static const struct export_operations ufs_export_ops = { + .fh_to_dentry = ufs_fh_to_dentry, + .fh_to_parent = ufs_fh_to_parent, + .get_parent = ufs_get_parent, +}; + #ifdef CONFIG_UFS_DEBUG /* * Print contents of ufs_super_block, useful for debugging @@ -990,6 +1041,7 @@ magic_found: * Read ufs_super_block into internal data structures */ sb->s_op = &ufs_super_ops; + sb->s_export_op = &ufs_export_ops; sb->dq_op = NULL; /***/ sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); |