/* * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. * * This copyrighted material is made available to anyone wishing to use, * modify, copy, or redistribute it subject to the terms and conditions * of the GNU General Public License version 2. */ #ifndef __INODE_DOT_H__ #define __INODE_DOT_H__ #include <linux/fs.h> #include <linux/buffer_head.h> #include <linux/mm.h> #include "util.h" extern int gfs2_releasepage(struct page *page, gfp_t gfp_mask); extern int gfs2_internal_read(struct gfs2_inode *ip, struct file_ra_state *ra_state, char *buf, loff_t *pos, unsigned size); extern void gfs2_page_add_databufs(struct gfs2_inode *ip, struct page *page, unsigned int from, unsigned int to); extern void gfs2_set_aops(struct inode *inode); static inline int gfs2_is_stuffed(const struct gfs2_inode *ip) { return !ip->i_height; } static inline int gfs2_is_jdata(const struct gfs2_inode *ip) { return ip->i_diskflags & GFS2_DIF_JDATA; } static inline int gfs2_is_writeback(const struct gfs2_inode *ip) { const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); return (sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK) && !gfs2_is_jdata(ip); } static inline int gfs2_is_ordered(const struct gfs2_inode *ip) { const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); return (sdp->sd_args.ar_data == GFS2_DATA_ORDERED) && !gfs2_is_jdata(ip); } static inline int gfs2_is_dir(const struct gfs2_inode *ip) { return S_ISDIR(ip->i_inode.i_mode); } static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks) { inode->i_blocks = blocks << (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT); } static inline u64 gfs2_get_inode_blocks(const struct inode *inode) { return inode->i_blocks >> (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT); } static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change) { gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks > -change)); change *= (GFS2_SB(inode)->sd_sb.sb_bsize/GFS2_BASIC_BLOCK); inode->i_blocks += change; } static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr, u64 no_formal_ino) { return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino; } static inline void gfs2_inum_out(const struct gfs2_inode *ip, struct gfs2_dirent *dent) { dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr); } static inline int gfs2_check_internal_file_size(struct inode *inode, u64 minsize, u64 maxsize) { u64 size = i_size_read(inode); if (size < minsize || size > maxsize) goto err; if (size & ((1 << inode->i_blkbits) - 1)) goto err; return 0; err: gfs2_consist_inode(GFS2_I(inode)); return -EIO; } extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type, u64 no_addr, u64 no_formal_ino); extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, u64 *no_formal_ino, unsigned int blktype); extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr); extern int gfs2_inode_refresh(struct gfs2_inode *ip); extern int gfs2_dinode_dealloc(struct gfs2_inode *inode); extern int gfs2_change_nlink(struct gfs2_inode *ip, int diff); extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, int is_root); extern struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name, unsigned int mode, dev_t dev); extern int gfs2_permission(struct inode *inode, int mask, unsigned int flags); extern int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr); extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name); extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf); extern void gfs2_dinode_print(const struct gfs2_inode *ip); extern const struct inode_operations gfs2_file_iops; extern const struct inode_operations gfs2_dir_iops; extern const struct inode_operations gfs2_symlink_iops; extern const struct file_operations gfs2_file_fops_nolock; extern const struct file_operations gfs2_dir_fops_nolock; extern void gfs2_set_inode_flags(struct inode *inode); #ifdef CONFIG_GFS2_FS_LOCKING_DLM extern const struct file_operations gfs2_file_fops; extern const struct file_operations gfs2_dir_fops; static inline int gfs2_localflocks(const struct gfs2_sbd *sdp) { return sdp->sd_args.ar_localflocks; } #else /* Single node only */ #define gfs2_file_fops gfs2_file_fops_nolock #define gfs2_dir_fops gfs2_dir_fops_nolock static inline int gfs2_localflocks(const struct gfs2_sbd *sdp) { return 1; } #endif /* CONFIG_GFS2_FS_LOCKING_DLM */ #endif /* __INODE_DOT_H__ */