^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) International Business Machines Corp., 2000-2002
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Portions Copyright (C) Christoph Hellwig, 2001-2002
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #ifndef _H_JFS_METAPAGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #define _H_JFS_METAPAGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) struct metapage {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) /* Common logsyncblk prefix (see jfs_logmgr.h) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) u16 xflag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) u16 unused;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) lid_t lid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) int lsn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct list_head synclist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) /* End of logsyncblk prefix */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) unsigned long flag; /* See Below */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) unsigned long count; /* Reference count */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) void *data; /* Data pointer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) sector_t index; /* block address of page */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) wait_queue_head_t wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) /* implementation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct page *page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct super_block *sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) unsigned int logical_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) /* Journal management */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) int clsn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) int nohomeok;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct jfs_log *log;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /* metapage flag */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define META_locked 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define META_dirty 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define META_sync 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define META_discard 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define META_forcewrite 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define META_io 6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define mark_metapage_dirty(mp) set_bit(META_dirty, &(mp)->flag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /* function prototypes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) extern int metapage_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) extern void metapage_exit(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) extern struct metapage *__get_metapage(struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) unsigned long lblock, unsigned int size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) int absolute, unsigned long new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define read_metapage(inode, lblock, size, absolute)\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) __get_metapage(inode, lblock, size, absolute, false)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define get_metapage(inode, lblock, size, absolute)\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) __get_metapage(inode, lblock, size, absolute, true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) extern void release_metapage(struct metapage *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) extern void grab_metapage(struct metapage *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) extern void force_metapage(struct metapage *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * hold_metapage and put_metapage are used in conjunction. The page lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * is not dropped between the two, so no other threads can get or release
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * the metapage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) extern void hold_metapage(struct metapage *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) extern void put_metapage(struct metapage *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static inline void write_metapage(struct metapage *mp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) set_bit(META_dirty, &mp->flag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) release_metapage(mp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static inline void flush_metapage(struct metapage *mp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) set_bit(META_sync, &mp->flag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) write_metapage(mp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static inline void discard_metapage(struct metapage *mp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) clear_bit(META_dirty, &mp->flag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) set_bit(META_discard, &mp->flag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) release_metapage(mp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static inline void metapage_nohomeok(struct metapage *mp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) struct page *page = mp->page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) lock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (!mp->nohomeok++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) mark_metapage_dirty(mp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) get_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) wait_on_page_writeback(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * This serializes access to mp->lsn when metapages are added to logsynclist
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * without setting nohomeok. i.e. updating imap & dmap
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static inline void metapage_wait_for_io(struct metapage *mp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (test_bit(META_io, &mp->flag))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) wait_on_page_writeback(mp->page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) * This is called when already holding the metapage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static inline void _metapage_homeok(struct metapage *mp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (!--mp->nohomeok)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) put_page(mp->page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static inline void metapage_homeok(struct metapage *mp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) hold_metapage(mp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) _metapage_homeok(mp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) put_metapage(mp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) extern const struct address_space_operations jfs_metapage_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) * This routines invalidate all pages for an extent.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) extern void __invalidate_metapages(struct inode *, s64, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) #define invalidate_pxd_metapages(ip, pxd) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) __invalidate_metapages((ip), addressPXD(&(pxd)), lengthPXD(&(pxd)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) #define invalidate_dxd_metapages(ip, dxd) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) __invalidate_metapages((ip), addressDXD(&(dxd)), lengthDXD(&(dxd)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) #define invalidate_xad_metapages(ip, xad) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) __invalidate_metapages((ip), addressXAD(&(xad)), lengthXAD(&(xad)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) #endif /* _H_JFS_METAPAGE */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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