384f3ced07
This implements the code to store the actual filename found during a lookup in the dentry cache and to avoid multiple entries in the dcache pointing to the same inode. To avoid polluting the dcache, we implement a new directory inode operations for lookup. xfs_vn_ci_lookup() stores the correct case name in the dcache. The "actual name" is only allocated and returned for a case- insensitive match and not an actual match. Another unusual interaction with the dcache is not storing negative dentries like other filesystems doing a d_add(dentry, NULL) when an ENOENT is returned. During the VFS lookup, if a dentry returned has no inode, dput is called and ENOENT is returned. By not doing a d_add, this actually removes it completely from the dcache to be reused. create/rename have to be modified to support unhashed dentries being passed in. SGI-PV: 981521 SGI-Modid: xfs-linux-melb:xfs-kern:31208a Signed-off-by: Barry Naujok <bnaujok@sgi.com> Signed-off-by: Christoph Hellwig <hch@infradead.org>
80 lines
3.4 KiB
C
80 lines
3.4 KiB
C
#ifndef _XFS_VNODEOPS_H
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#define _XFS_VNODEOPS_H 1
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struct attrlist_cursor_kern;
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struct bhv_vattr;
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struct cred;
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struct file;
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struct inode;
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struct iovec;
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struct kiocb;
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struct pipe_inode_info;
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struct uio;
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struct xfs_inode;
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struct xfs_iomap;
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int xfs_open(struct xfs_inode *ip);
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int xfs_setattr(struct xfs_inode *ip, struct bhv_vattr *vap, int flags,
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struct cred *credp);
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int xfs_readlink(struct xfs_inode *ip, char *link);
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int xfs_fsync(struct xfs_inode *ip);
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int xfs_release(struct xfs_inode *ip);
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int xfs_inactive(struct xfs_inode *ip);
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int xfs_lookup(struct xfs_inode *dp, struct xfs_name *name,
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struct xfs_inode **ipp, struct xfs_name *ci_name);
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int xfs_create(struct xfs_inode *dp, struct xfs_name *name, mode_t mode,
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xfs_dev_t rdev, struct xfs_inode **ipp, struct cred *credp);
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int xfs_remove(struct xfs_inode *dp, struct xfs_name *name,
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struct xfs_inode *ip);
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int xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip,
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struct xfs_name *target_name);
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int xfs_mkdir(struct xfs_inode *dp, struct xfs_name *dir_name,
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mode_t mode, struct xfs_inode **ipp, struct cred *credp);
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int xfs_rmdir(struct xfs_inode *dp, struct xfs_name *name,
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struct xfs_inode *cdp);
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int xfs_readdir(struct xfs_inode *dp, void *dirent, size_t bufsize,
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xfs_off_t *offset, filldir_t filldir);
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int xfs_symlink(struct xfs_inode *dp, struct xfs_name *link_name,
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const char *target_path, mode_t mode, struct xfs_inode **ipp,
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struct cred *credp);
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int xfs_inode_flush(struct xfs_inode *ip, int flags);
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int xfs_set_dmattrs(struct xfs_inode *ip, u_int evmask, u_int16_t state);
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int xfs_reclaim(struct xfs_inode *ip);
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int xfs_change_file_space(struct xfs_inode *ip, int cmd,
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xfs_flock64_t *bf, xfs_off_t offset,
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struct cred *credp, int attr_flags);
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int xfs_rename(struct xfs_inode *src_dp, struct xfs_name *src_name,
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struct xfs_inode *src_ip, struct xfs_inode *target_dp,
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struct xfs_name *target_name, struct xfs_inode *target_ip);
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int xfs_attr_get(struct xfs_inode *ip, const char *name, char *value,
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int *valuelenp, int flags);
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int xfs_attr_set(struct xfs_inode *dp, const char *name, char *value,
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int valuelen, int flags);
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int xfs_attr_remove(struct xfs_inode *dp, const char *name, int flags);
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int xfs_attr_list(struct xfs_inode *dp, char *buffer, int bufsize,
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int flags, struct attrlist_cursor_kern *cursor);
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int xfs_ioctl(struct xfs_inode *ip, struct file *filp,
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int ioflags, unsigned int cmd, void __user *arg);
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ssize_t xfs_read(struct xfs_inode *ip, struct kiocb *iocb,
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const struct iovec *iovp, unsigned int segs,
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loff_t *offset, int ioflags);
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ssize_t xfs_splice_read(struct xfs_inode *ip, struct file *infilp,
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loff_t *ppos, struct pipe_inode_info *pipe, size_t count,
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int flags, int ioflags);
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ssize_t xfs_splice_write(struct xfs_inode *ip,
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struct pipe_inode_info *pipe, struct file *outfilp,
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loff_t *ppos, size_t count, int flags, int ioflags);
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ssize_t xfs_write(struct xfs_inode *xip, struct kiocb *iocb,
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const struct iovec *iovp, unsigned int nsegs,
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loff_t *offset, int ioflags);
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int xfs_bmap(struct xfs_inode *ip, xfs_off_t offset, ssize_t count,
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int flags, struct xfs_iomap *iomapp, int *niomaps);
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void xfs_tosspages(struct xfs_inode *inode, xfs_off_t first,
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xfs_off_t last, int fiopt);
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int xfs_flushinval_pages(struct xfs_inode *ip, xfs_off_t first,
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xfs_off_t last, int fiopt);
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int xfs_flush_pages(struct xfs_inode *ip, xfs_off_t first,
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xfs_off_t last, uint64_t flags, int fiopt);
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#endif /* _XFS_VNODEOPS_H */
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