Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (c) 2006-2007 Silicon Graphics, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright (c) 2014 Christoph Hellwig.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include "xfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include "xfs_shared.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include "xfs_format.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include "xfs_log_format.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include "xfs_trans_resv.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include "xfs_sb.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include "xfs_mount.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include "xfs_inode.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include "xfs_bmap.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include "xfs_alloc.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include "xfs_mru_cache.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include "xfs_trace.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include "xfs_ag_resv.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include "xfs_trans.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include "xfs_filestream.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) struct xfs_fstrm_item {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	struct xfs_mru_cache_elem	mru;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	xfs_agnumber_t			ag; /* AG in use for this directory */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) enum xfs_fstrm_alloc {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	XFS_PICK_USERDATA = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	XFS_PICK_LOWSPACE = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34)  * Allocation group filestream associations are tracked with per-ag atomic
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35)  * counters.  These counters allow xfs_filestream_pick_ag() to tell whether a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36)  * particular AG already has active filestreams associated with it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) xfs_filestream_peek_ag(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	xfs_mount_t	*mp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	xfs_agnumber_t	agno)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	struct xfs_perag *pag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	int		ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	pag = xfs_perag_get(mp, agno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	ret = atomic_read(&pag->pagf_fstrms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	xfs_perag_put(pag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) xfs_filestream_get_ag(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	xfs_mount_t	*mp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	xfs_agnumber_t	agno)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	struct xfs_perag *pag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	int		ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	pag = xfs_perag_get(mp, agno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	ret = atomic_inc_return(&pag->pagf_fstrms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	xfs_perag_put(pag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) xfs_filestream_put_ag(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	xfs_mount_t	*mp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	xfs_agnumber_t	agno)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	struct xfs_perag *pag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	pag = xfs_perag_get(mp, agno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	atomic_dec(&pag->pagf_fstrms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	xfs_perag_put(pag);
^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 void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) xfs_fstrm_free_func(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	void			*data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	struct xfs_mru_cache_elem *mru)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	struct xfs_mount	*mp = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	struct xfs_fstrm_item	*item =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		container_of(mru, struct xfs_fstrm_item, mru);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	xfs_filestream_put_ag(mp, item->ag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	trace_xfs_filestream_free(mp, mru->key, item->ag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	kmem_free(item);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94)  * Scan the AGs starting at startag looking for an AG that isn't in use and has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95)  * at least minlen blocks free.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) xfs_filestream_pick_ag(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	struct xfs_inode	*ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	xfs_agnumber_t		startag,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	xfs_agnumber_t		*agp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	int			flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	xfs_extlen_t		minlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	struct xfs_mount	*mp = ip->i_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	struct xfs_fstrm_item	*item;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	struct xfs_perag	*pag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	xfs_extlen_t		longest, free = 0, minfree, maxfree = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	xfs_agnumber_t		ag, max_ag = NULLAGNUMBER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	int			err, trylock, nscan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	ASSERT(S_ISDIR(VFS_I(ip)->i_mode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	/* 2% of an AG's blocks must be free for it to be chosen. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	minfree = mp->m_sb.sb_agblocks / 50;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	ag = startag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	*agp = NULLAGNUMBER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	/* For the first pass, don't sleep trying to init the per-AG. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	trylock = XFS_ALLOC_FLAG_TRYLOCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	for (nscan = 0; 1; nscan++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		trace_xfs_filestream_scan(mp, ip->i_ino, ag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		pag = xfs_perag_get(mp, ag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		if (!pag->pagf_init) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 			err = xfs_alloc_pagf_init(mp, NULL, ag, trylock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 			if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 				xfs_perag_put(pag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 				if (err != -EAGAIN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 					return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 				/* Couldn't lock the AGF, skip this AG. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 				continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		/* Keep track of the AG with the most free blocks. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		if (pag->pagf_freeblks > maxfree) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 			maxfree = pag->pagf_freeblks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 			max_ag = ag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		 * The AG reference count does two things: it enforces mutual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		 * exclusion when examining the suitability of an AG in this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		 * loop, and it guards against two filestreams being established
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		 * in the same AG as each other.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		if (xfs_filestream_get_ag(mp, ag) > 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 			xfs_filestream_put_ag(mp, ag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 			goto next_ag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		longest = xfs_alloc_longest_free_extent(pag,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 				xfs_alloc_min_freelist(mp, pag),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 				xfs_ag_resv_needed(pag, XFS_AG_RESV_NONE));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		if (((minlen && longest >= minlen) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		     (!minlen && pag->pagf_freeblks >= minfree)) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		    (!pag->pagf_metadata || !(flags & XFS_PICK_USERDATA) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		     (flags & XFS_PICK_LOWSPACE))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 			/* Break out, retaining the reference on the AG. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 			free = pag->pagf_freeblks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 			xfs_perag_put(pag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 			*agp = ag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		/* Drop the reference on this AG, it's not usable. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		xfs_filestream_put_ag(mp, ag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) next_ag:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		xfs_perag_put(pag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		/* Move to the next AG, wrapping to AG 0 if necessary. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		if (++ag >= mp->m_sb.sb_agcount)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 			ag = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		/* If a full pass of the AGs hasn't been done yet, continue. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		if (ag != startag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		/* Allow sleeping in xfs_alloc_pagf_init() on the 2nd pass. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		if (trylock != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 			trylock = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		/* Finally, if lowspace wasn't set, set it for the 3rd pass. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		if (!(flags & XFS_PICK_LOWSPACE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 			flags |= XFS_PICK_LOWSPACE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		 * Take the AG with the most free space, regardless of whether
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		 * it's already in use by another filestream.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		if (max_ag != NULLAGNUMBER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 			xfs_filestream_get_ag(mp, max_ag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 			free = maxfree;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 			*agp = max_ag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		/* take AG 0 if none matched */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		trace_xfs_filestream_pick(ip, *agp, free, nscan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		*agp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	trace_xfs_filestream_pick(ip, *agp, free, nscan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	if (*agp == NULLAGNUMBER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	item = kmem_alloc(sizeof(*item), KM_MAYFAIL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	if (!item)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		goto out_put_ag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	item->ag = *agp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	err = xfs_mru_cache_insert(mp->m_filestream, ip->i_ino, &item->mru);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		if (err == -EEXIST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 			err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		goto out_free_item;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) out_free_item:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	kmem_free(item);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) out_put_ag:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	xfs_filestream_put_ag(mp, *agp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) static struct xfs_inode *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) xfs_filestream_get_parent(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	struct xfs_inode	*ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	struct inode		*inode = VFS_I(ip), *dir = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	struct dentry		*dentry, *parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	dentry = d_find_alias(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	if (!dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	parent = dget_parent(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	if (!parent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		goto out_dput;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	dir = igrab(d_inode(parent));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	dput(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) out_dput:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	dput(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	return dir ? XFS_I(dir) : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)  * Find the right allocation group for a file, either by finding an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)  * existing file stream or creating a new one.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)  * Returns NULLAGNUMBER in case of an error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) xfs_agnumber_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) xfs_filestream_lookup_ag(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	struct xfs_inode	*ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	struct xfs_mount	*mp = ip->i_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	struct xfs_inode	*pip = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	xfs_agnumber_t		startag, ag = NULLAGNUMBER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	struct xfs_mru_cache_elem *mru;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	ASSERT(S_ISREG(VFS_I(ip)->i_mode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	pip = xfs_filestream_get_parent(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	if (!pip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		return NULLAGNUMBER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	mru = xfs_mru_cache_lookup(mp->m_filestream, pip->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	if (mru) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		ag = container_of(mru, struct xfs_fstrm_item, mru)->ag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		xfs_mru_cache_done(mp->m_filestream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		trace_xfs_filestream_lookup(mp, ip->i_ino, ag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	 * Set the starting AG using the rotor for inode32, otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	 * use the directory inode's AG.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	if (mp->m_flags & XFS_MOUNT_32BITINODES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		xfs_agnumber_t	 rotorstep = xfs_rotorstep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		startag = (mp->m_agfrotor / rotorstep) % mp->m_sb.sb_agcount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		mp->m_agfrotor = (mp->m_agfrotor + 1) %
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		                 (mp->m_sb.sb_agcount * rotorstep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		startag = XFS_INO_TO_AGNO(mp, pip->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	if (xfs_filestream_pick_ag(pip, startag, &ag, 0, 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 		ag = NULLAGNUMBER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	xfs_irele(pip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	return ag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)  * Pick a new allocation group for the current file and its file stream.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)  * This is called when the allocator can't find a suitable extent in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)  * current AG, and we have to move the stream into a new AG with more space.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) xfs_filestream_new_ag(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	struct xfs_bmalloca	*ap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	xfs_agnumber_t		*agp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	struct xfs_inode	*ip = ap->ip, *pip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	struct xfs_mount	*mp = ip->i_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	xfs_extlen_t		minlen = ap->length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	xfs_agnumber_t		startag = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	int			flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	int			err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	struct xfs_mru_cache_elem *mru;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	*agp = NULLAGNUMBER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	pip = xfs_filestream_get_parent(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	if (!pip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 		goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	mru = xfs_mru_cache_remove(mp->m_filestream, pip->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	if (mru) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 		struct xfs_fstrm_item *item =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 			container_of(mru, struct xfs_fstrm_item, mru);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 		startag = (item->ag + 1) % mp->m_sb.sb_agcount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	if (ap->datatype & XFS_ALLOC_USERDATA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 		flags |= XFS_PICK_USERDATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	if (ap->tp->t_flags & XFS_TRANS_LOWMODE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 		flags |= XFS_PICK_LOWSPACE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	err = xfs_filestream_pick_ag(pip, startag, agp, flags, minlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	 * Only free the item here so we skip over the old AG earlier.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	if (mru)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 		xfs_fstrm_free_func(mp, mru);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	xfs_irele(pip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 	if (*agp == NULLAGNUMBER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 		*agp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) xfs_filestream_deassociate(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	struct xfs_inode	*ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	xfs_mru_cache_delete(ip->i_mount->m_filestream, ip->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) xfs_filestream_mount(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	xfs_mount_t	*mp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	 * The filestream timer tunable is currently fixed within the range of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	 * one second to four minutes, with five seconds being the default.  The
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	 * group count is somewhat arbitrary, but it'd be nice to adhere to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 	 * timer tunable to within about 10 percent.  This requires at least 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 	 * groups.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	return xfs_mru_cache_create(&mp->m_filestream, mp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 			xfs_fstrm_centisecs * 10, 10, xfs_fstrm_free_func);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) xfs_filestream_unmount(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 	xfs_mount_t	*mp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 	xfs_mru_cache_destroy(mp->m_filestream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) }