From a36159eec6ca17402b0e146b86efaf76568dc353 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 20 Sep 2024 01:41:23 +0000
Subject: [PATCH] 重命名 AX88772C_eeprom/asix.c 为 asix_mac.c
---
kernel/fs/xfs/libxfs/xfs_attr_remote.c | 336 +++++++++++++++++++++++++++++++++++--------------------
1 files changed, 214 insertions(+), 122 deletions(-)
diff --git a/kernel/fs/xfs/libxfs/xfs_attr_remote.c b/kernel/fs/xfs/libxfs/xfs_attr_remote.c
index d89363c..48d8e9c 100644
--- a/kernel/fs/xfs/libxfs/xfs_attr_remote.c
+++ b/kernel/fs/xfs/libxfs/xfs_attr_remote.c
@@ -16,21 +16,31 @@
#include "xfs_da_format.h"
#include "xfs_da_btree.h"
#include "xfs_inode.h"
-#include "xfs_alloc.h"
#include "xfs_trans.h"
-#include "xfs_inode_item.h"
#include "xfs_bmap.h"
-#include "xfs_bmap_util.h"
#include "xfs_attr.h"
-#include "xfs_attr_leaf.h"
#include "xfs_attr_remote.h"
-#include "xfs_trans_space.h"
#include "xfs_trace.h"
-#include "xfs_cksum.h"
-#include "xfs_buf_item.h"
#include "xfs_error.h"
#define ATTR_RMTVALUE_MAPSIZE 1 /* # of map entries at once */
+
+/*
+ * Remote Attribute Values
+ * =======================
+ *
+ * Remote extended attribute values are conceptually simple -- they're written
+ * to data blocks mapped by an inode's attribute fork, and they have an upper
+ * size limit of 64k. Setting a value does not involve the XFS log.
+ *
+ * However, on a v5 filesystem, maximally sized remote attr values require one
+ * block more than 64k worth of space to hold both the remote attribute value
+ * header (64 bytes). On a 4k block filesystem this results in a 68k buffer;
+ * on a 64k block filesystem, this would be a 128k buffer. Note that the log
+ * format can only handle a dirty buffer of XFS_MAX_BLOCKSIZE length (64k).
+ * Therefore, we /must/ ensure that remote attribute value buffers never touch
+ * the logging system and therefore never have a log item.
+ */
/*
* Each contiguous block has a header, so it is not just a simple attribute
@@ -79,15 +89,14 @@
static xfs_failaddr_t
xfs_attr3_rmt_verify(
struct xfs_mount *mp,
+ struct xfs_buf *bp,
void *ptr,
int fsbsize,
xfs_daddr_t bno)
{
struct xfs_attr3_rmt_hdr *rmt = ptr;
- if (!xfs_sb_version_hascrc(&mp->m_sb))
- return __this_address;
- if (rmt->rm_magic != cpu_to_be32(XFS_ATTR3_RMT_MAGIC))
+ if (!xfs_verify_magic(bp, rmt->rm_magic))
return __this_address;
if (!uuid_equal(&rmt->rm_uuid, &mp->m_sb.sb_meta_uuid))
return __this_address;
@@ -110,7 +119,7 @@
bool check_crc,
xfs_failaddr_t *failaddr)
{
- struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_mount *mp = bp->b_mount;
char *ptr;
int len;
xfs_daddr_t bno;
@@ -131,7 +140,7 @@
*failaddr = __this_address;
return -EFSBADCRC;
}
- *failaddr = xfs_attr3_rmt_verify(mp, ptr, blksize, bno);
+ *failaddr = xfs_attr3_rmt_verify(mp, bp, ptr, blksize, bno);
if (*failaddr)
return -EFSCORRUPTED;
len -= blksize;
@@ -174,7 +183,7 @@
xfs_attr3_rmt_write_verify(
struct xfs_buf *bp)
{
- struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_mount *mp = bp->b_mount;
xfs_failaddr_t fa;
int blksize = mp->m_attr_geo->blksize;
char *ptr;
@@ -193,7 +202,7 @@
while (len > 0) {
struct xfs_attr3_rmt_hdr *rmt = (struct xfs_attr3_rmt_hdr *)ptr;
- fa = xfs_attr3_rmt_verify(mp, ptr, blksize, bno);
+ fa = xfs_attr3_rmt_verify(mp, bp, ptr, blksize, bno);
if (fa) {
xfs_verifier_error(bp, -EFSCORRUPTED, fa);
return;
@@ -220,6 +229,7 @@
const struct xfs_buf_ops xfs_attr3_rmt_buf_ops = {
.name = "xfs_attr3_rmt",
+ .magic = { 0, cpu_to_be32(XFS_ATTR3_RMT_MAGIC) },
.verify_read = xfs_attr3_rmt_read_verify,
.verify_write = xfs_attr3_rmt_write_verify,
.verify_struct = xfs_attr3_rmt_verify_struct,
@@ -364,6 +374,8 @@
/*
* Read the value associated with an attribute from the out-of-line buffer
* that we stored it in.
+ *
+ * Returns 0 on successful retrieval, otherwise an error.
*/
int
xfs_attr_rmtval_get(
@@ -383,7 +395,7 @@
trace_xfs_attr_rmtval_get(args);
- ASSERT(!(args->flags & ATTR_KERNOVAL));
+ ASSERT(args->valuelen != 0);
ASSERT(args->rmtvaluelen == args->valuelen);
valuelen = args->rmtvaluelen;
@@ -404,17 +416,15 @@
(map[i].br_startblock != HOLESTARTBLOCK));
dblkno = XFS_FSB_TO_DADDR(mp, map[i].br_startblock);
dblkcnt = XFS_FSB_TO_BB(mp, map[i].br_blockcount);
- error = xfs_trans_read_buf(mp, args->trans,
- mp->m_ddev_targp,
- dblkno, dblkcnt, 0, &bp,
- &xfs_attr3_rmt_buf_ops);
+ error = xfs_buf_read(mp->m_ddev_targp, dblkno, dblkcnt,
+ 0, &bp, &xfs_attr3_rmt_buf_ops);
if (error)
return error;
error = xfs_attr_rmtval_copyout(mp, bp, args->dp->i_ino,
&offset, &valuelen,
&dst);
- xfs_trans_brelse(args->trans, bp);
+ xfs_buf_relse(bp);
if (error)
return error;
@@ -428,6 +438,130 @@
}
/*
+ * Find a "hole" in the attribute address space large enough for us to drop the
+ * new attribute's value into
+ */
+STATIC int
+xfs_attr_rmt_find_hole(
+ struct xfs_da_args *args)
+{
+ struct xfs_inode *dp = args->dp;
+ struct xfs_mount *mp = dp->i_mount;
+ int error;
+ int blkcnt;
+ xfs_fileoff_t lfileoff = 0;
+
+ /*
+ * Because CRC enable attributes have headers, we can't just do a
+ * straight byte to FSB conversion and have to take the header space
+ * into account.
+ */
+ blkcnt = xfs_attr3_rmt_blocks(mp, args->rmtvaluelen);
+ error = xfs_bmap_first_unused(args->trans, args->dp, blkcnt, &lfileoff,
+ XFS_ATTR_FORK);
+ if (error)
+ return error;
+
+ args->rmtblkno = (xfs_dablk_t)lfileoff;
+ args->rmtblkcnt = blkcnt;
+
+ return 0;
+}
+
+STATIC int
+xfs_attr_rmtval_set_value(
+ struct xfs_da_args *args)
+{
+ struct xfs_inode *dp = args->dp;
+ struct xfs_mount *mp = dp->i_mount;
+ struct xfs_bmbt_irec map;
+ xfs_dablk_t lblkno;
+ uint8_t *src = args->value;
+ int blkcnt;
+ int valuelen;
+ int nmap;
+ int error;
+ int offset = 0;
+
+ /*
+ * Roll through the "value", copying the attribute value to the
+ * already-allocated blocks. Blocks are written synchronously
+ * so that we can know they are all on disk before we turn off
+ * the INCOMPLETE flag.
+ */
+ lblkno = args->rmtblkno;
+ blkcnt = args->rmtblkcnt;
+ valuelen = args->rmtvaluelen;
+ while (valuelen > 0) {
+ struct xfs_buf *bp;
+ xfs_daddr_t dblkno;
+ int dblkcnt;
+
+ ASSERT(blkcnt > 0);
+
+ nmap = 1;
+ error = xfs_bmapi_read(dp, (xfs_fileoff_t)lblkno,
+ blkcnt, &map, &nmap,
+ XFS_BMAPI_ATTRFORK);
+ if (error)
+ return error;
+ ASSERT(nmap == 1);
+ ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&
+ (map.br_startblock != HOLESTARTBLOCK));
+
+ dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock),
+ dblkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount);
+
+ error = xfs_buf_get(mp->m_ddev_targp, dblkno, dblkcnt, &bp);
+ if (error)
+ return error;
+ bp->b_ops = &xfs_attr3_rmt_buf_ops;
+
+ xfs_attr_rmtval_copyin(mp, bp, args->dp->i_ino, &offset,
+ &valuelen, &src);
+
+ error = xfs_bwrite(bp); /* GROT: NOTE: synchronous write */
+ xfs_buf_relse(bp);
+ if (error)
+ return error;
+
+
+ /* roll attribute extent map forwards */
+ lblkno += map.br_blockcount;
+ blkcnt -= map.br_blockcount;
+ }
+ ASSERT(valuelen == 0);
+ return 0;
+}
+
+/* Mark stale any incore buffers for the remote value. */
+int
+xfs_attr_rmtval_stale(
+ struct xfs_inode *ip,
+ struct xfs_bmbt_irec *map,
+ xfs_buf_flags_t incore_flags)
+{
+ struct xfs_mount *mp = ip->i_mount;
+ struct xfs_buf *bp;
+
+ ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
+
+ if (XFS_IS_CORRUPT(mp, map->br_startblock == DELAYSTARTBLOCK) ||
+ XFS_IS_CORRUPT(mp, map->br_startblock == HOLESTARTBLOCK))
+ return -EFSCORRUPTED;
+
+ bp = xfs_buf_incore(mp->m_ddev_targp,
+ XFS_FSB_TO_DADDR(mp, map->br_startblock),
+ XFS_FSB_TO_BB(mp, map->br_blockcount), incore_flags);
+ if (bp) {
+ xfs_buf_stale(bp);
+ xfs_buf_relse(bp);
+ }
+
+ return 0;
+}
+
+/*
* Write the value associated with an attribute into the out-of-line buffer
* that we have defined for it.
*/
@@ -436,34 +570,20 @@
struct xfs_da_args *args)
{
struct xfs_inode *dp = args->dp;
- struct xfs_mount *mp = dp->i_mount;
struct xfs_bmbt_irec map;
xfs_dablk_t lblkno;
- xfs_fileoff_t lfileoff = 0;
- uint8_t *src = args->value;
int blkcnt;
- int valuelen;
int nmap;
int error;
- int offset = 0;
trace_xfs_attr_rmtval_set(args);
- /*
- * Find a "hole" in the attribute address space large enough for
- * us to drop the new attribute's value into. Because CRC enable
- * attributes have headers, we can't just do a straight byte to FSB
- * conversion and have to take the header space into account.
- */
- blkcnt = xfs_attr3_rmt_blocks(mp, args->rmtvaluelen);
- error = xfs_bmap_first_unused(args->trans, args->dp, blkcnt, &lfileoff,
- XFS_ATTR_FORK);
+ error = xfs_attr_rmt_find_hole(args);
if (error)
return error;
- args->rmtblkno = lblkno = (xfs_dablk_t)lfileoff;
- args->rmtblkcnt = blkcnt;
-
+ blkcnt = args->rmtblkcnt;
+ lblkno = (xfs_dablk_t)args->rmtblkno;
/*
* Roll through the "value", allocating blocks on disk as required.
*/
@@ -504,55 +624,7 @@
return error;
}
- /*
- * Roll through the "value", copying the attribute value to the
- * already-allocated blocks. Blocks are written synchronously
- * so that we can know they are all on disk before we turn off
- * the INCOMPLETE flag.
- */
- lblkno = args->rmtblkno;
- blkcnt = args->rmtblkcnt;
- valuelen = args->rmtvaluelen;
- while (valuelen > 0) {
- struct xfs_buf *bp;
- xfs_daddr_t dblkno;
- int dblkcnt;
-
- ASSERT(blkcnt > 0);
-
- nmap = 1;
- error = xfs_bmapi_read(dp, (xfs_fileoff_t)lblkno,
- blkcnt, &map, &nmap,
- XFS_BMAPI_ATTRFORK);
- if (error)
- return error;
- ASSERT(nmap == 1);
- ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&
- (map.br_startblock != HOLESTARTBLOCK));
-
- dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock),
- dblkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount);
-
- bp = xfs_buf_get(mp->m_ddev_targp, dblkno, dblkcnt, 0);
- if (!bp)
- return -ENOMEM;
- bp->b_ops = &xfs_attr3_rmt_buf_ops;
-
- xfs_attr_rmtval_copyin(mp, bp, args->dp->i_ino, &offset,
- &valuelen, &src);
-
- error = xfs_bwrite(bp); /* GROT: NOTE: synchronous write */
- xfs_buf_relse(bp);
- if (error)
- return error;
-
-
- /* roll attribute extent map forwards */
- lblkno += map.br_blockcount;
- blkcnt -= map.br_blockcount;
- }
- ASSERT(valuelen == 0);
- return 0;
+ return xfs_attr_rmtval_set_value(args);
}
/*
@@ -560,16 +632,12 @@
* out-of-line buffer that it is stored on.
*/
int
-xfs_attr_rmtval_remove(
+xfs_attr_rmtval_invalidate(
struct xfs_da_args *args)
{
- struct xfs_mount *mp = args->dp->i_mount;
xfs_dablk_t lblkno;
int blkcnt;
int error;
- int done;
-
- trace_xfs_attr_rmtval_remove(args);
/*
* Roll through the "value", invalidating the attribute value's blocks.
@@ -578,9 +646,6 @@
blkcnt = args->rmtblkcnt;
while (blkcnt > 0) {
struct xfs_bmbt_irec map;
- struct xfs_buf *bp;
- xfs_daddr_t dblkno;
- int dblkcnt;
int nmap;
/*
@@ -591,41 +656,38 @@
blkcnt, &map, &nmap, XFS_BMAPI_ATTRFORK);
if (error)
return error;
- ASSERT(nmap == 1);
- ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&
- (map.br_startblock != HOLESTARTBLOCK));
-
- dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock),
- dblkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount);
-
- /*
- * If the "remote" value is in the cache, remove it.
- */
- bp = xfs_buf_incore(mp->m_ddev_targp, dblkno, dblkcnt, XBF_TRYLOCK);
- if (bp) {
- xfs_buf_stale(bp);
- xfs_buf_relse(bp);
- bp = NULL;
- }
+ if (XFS_IS_CORRUPT(args->dp->i_mount, nmap != 1))
+ return -EFSCORRUPTED;
+ error = xfs_attr_rmtval_stale(args->dp, &map, XBF_TRYLOCK);
+ if (error)
+ return error;
lblkno += map.br_blockcount;
blkcnt -= map.br_blockcount;
}
+ return 0;
+}
+
+/*
+ * Remove the value associated with an attribute by deleting the
+ * out-of-line buffer that it is stored on.
+ */
+int
+xfs_attr_rmtval_remove(
+ struct xfs_da_args *args)
+{
+ int error;
+ int retval;
+
+ trace_xfs_attr_rmtval_remove(args);
/*
* Keep de-allocating extents until the remote-value region is gone.
*/
- lblkno = args->rmtblkno;
- blkcnt = args->rmtblkcnt;
- done = 0;
- while (!done) {
- error = xfs_bunmapi(args->trans, args->dp, lblkno, blkcnt,
- XFS_BMAPI_ATTRFORK, 1, &done);
- if (error)
- return error;
- error = xfs_defer_finish(&args->trans);
- if (error)
- return error;
+ do {
+ retval = __xfs_attr_rmtval_remove(args);
+ if (retval && retval != -EAGAIN)
+ return retval;
/*
* Close out trans and start the next one in the chain.
@@ -633,6 +695,36 @@
error = xfs_trans_roll_inode(&args->trans, args->dp);
if (error)
return error;
- }
+ } while (retval == -EAGAIN);
+
return 0;
}
+
+/*
+ * Remove the value associated with an attribute by deleting the out-of-line
+ * buffer that it is stored on. Returns EAGAIN for the caller to refresh the
+ * transaction and re-call the function
+ */
+int
+__xfs_attr_rmtval_remove(
+ struct xfs_da_args *args)
+{
+ int error, done;
+
+ /*
+ * Unmap value blocks for this attr.
+ */
+ error = xfs_bunmapi(args->trans, args->dp, args->rmtblkno,
+ args->rmtblkcnt, XFS_BMAPI_ATTRFORK, 1, &done);
+ if (error)
+ return error;
+
+ error = xfs_defer_finish(&args->trans);
+ if (error)
+ return error;
+
+ if (!done)
+ return -EAGAIN;
+
+ return error;
+}
--
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