mirror of https://gitee.com/openkylin/linux.git
xfs: devirtualize ->sf_entsize and ->sf_nextentry
Just check for file-type enabled directories directly. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig
Darrick J. Wong
parent
84915e1bdd
commit
50f6bb6b7a
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@ -15,48 +15,6 @@
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#include "xfs_dir2.h"
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#include "xfs_dir2_priv.h"
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/*
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* Shortform directory ops
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*/
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static int
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xfs_dir2_sf_entsize(
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struct xfs_dir2_sf_hdr *hdr,
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int len)
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{
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int count = sizeof(struct xfs_dir2_sf_entry); /* namelen + offset */
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count += len; /* name */
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count += hdr->i8count ? XFS_INO64_SIZE : XFS_INO32_SIZE; /* ino # */
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return count;
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}
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static int
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xfs_dir3_sf_entsize(
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struct xfs_dir2_sf_hdr *hdr,
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int len)
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{
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return xfs_dir2_sf_entsize(hdr, len) + sizeof(uint8_t);
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}
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static struct xfs_dir2_sf_entry *
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xfs_dir2_sf_nextentry(
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struct xfs_dir2_sf_hdr *hdr,
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struct xfs_dir2_sf_entry *sfep)
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{
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return (struct xfs_dir2_sf_entry *)
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((char *)sfep + xfs_dir2_sf_entsize(hdr, sfep->namelen));
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}
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static struct xfs_dir2_sf_entry *
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xfs_dir3_sf_nextentry(
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struct xfs_dir2_sf_hdr *hdr,
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struct xfs_dir2_sf_entry *sfep)
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{
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return (struct xfs_dir2_sf_entry *)
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((char *)sfep + xfs_dir3_sf_entsize(hdr, sfep->namelen));
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}
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/*
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* For filetype enabled shortform directories, the file type field is stored at
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* the end of the name. Because it's only a single byte, endian conversion is
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@ -401,8 +359,6 @@ xfs_dir3_data_unused_p(struct xfs_dir2_data_hdr *hdr)
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}
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static const struct xfs_dir_ops xfs_dir2_ops = {
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.sf_entsize = xfs_dir2_sf_entsize,
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.sf_nextentry = xfs_dir2_sf_nextentry,
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.sf_get_ftype = xfs_dir2_sfe_get_ftype,
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.sf_put_ftype = xfs_dir2_sfe_put_ftype,
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.sf_get_ino = xfs_dir2_sfe_get_ino,
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@ -430,8 +386,6 @@ static const struct xfs_dir_ops xfs_dir2_ops = {
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};
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static const struct xfs_dir_ops xfs_dir2_ftype_ops = {
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.sf_entsize = xfs_dir3_sf_entsize,
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.sf_nextentry = xfs_dir3_sf_nextentry,
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.sf_get_ftype = xfs_dir3_sfe_get_ftype,
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.sf_put_ftype = xfs_dir3_sfe_put_ftype,
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.sf_get_ino = xfs_dir3_sfe_get_ino,
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@ -459,8 +413,6 @@ static const struct xfs_dir_ops xfs_dir2_ftype_ops = {
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};
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static const struct xfs_dir_ops xfs_dir3_ops = {
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.sf_entsize = xfs_dir3_sf_entsize,
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.sf_nextentry = xfs_dir3_sf_nextentry,
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.sf_get_ftype = xfs_dir3_sfe_get_ftype,
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.sf_put_ftype = xfs_dir3_sfe_put_ftype,
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.sf_get_ino = xfs_dir3_sfe_get_ino,
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@ -32,10 +32,6 @@ extern unsigned char xfs_mode_to_ftype(int mode);
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* directory operations vector for encode/decode routines
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*/
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struct xfs_dir_ops {
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int (*sf_entsize)(struct xfs_dir2_sf_hdr *hdr, int len);
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struct xfs_dir2_sf_entry *
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(*sf_nextentry)(struct xfs_dir2_sf_hdr *hdr,
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struct xfs_dir2_sf_entry *sfep);
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uint8_t (*sf_get_ftype)(struct xfs_dir2_sf_entry *sfep);
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void (*sf_put_ftype)(struct xfs_dir2_sf_entry *sfep,
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uint8_t ftype);
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@ -1225,7 +1225,7 @@ xfs_dir2_sf_to_block(
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if (++i == sfp->count)
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sfep = NULL;
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else
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sfep = dp->d_ops->sf_nextentry(sfp, sfep);
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sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep);
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}
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/* Done with the temporary buffer */
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kmem_free(sfp);
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@ -147,6 +147,8 @@ extern int xfs_dir2_free_read(struct xfs_trans *tp, struct xfs_inode *dp,
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/* xfs_dir2_sf.c */
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xfs_ino_t xfs_dir2_sf_get_parent_ino(struct xfs_dir2_sf_hdr *hdr);
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void xfs_dir2_sf_put_parent_ino(struct xfs_dir2_sf_hdr *hdr, xfs_ino_t ino);
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struct xfs_dir2_sf_entry *xfs_dir2_sf_nextentry(struct xfs_mount *mp,
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struct xfs_dir2_sf_hdr *hdr, struct xfs_dir2_sf_entry *sfep);
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extern int xfs_dir2_block_sfsize(struct xfs_inode *dp,
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struct xfs_dir2_data_hdr *block, struct xfs_dir2_sf_hdr *sfhp);
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extern int xfs_dir2_block_to_sf(struct xfs_da_args *args, struct xfs_buf *bp,
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@ -37,6 +37,31 @@ static void xfs_dir2_sf_check(xfs_da_args_t *args);
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static void xfs_dir2_sf_toino4(xfs_da_args_t *args);
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static void xfs_dir2_sf_toino8(xfs_da_args_t *args);
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static int
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xfs_dir2_sf_entsize(
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struct xfs_mount *mp,
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struct xfs_dir2_sf_hdr *hdr,
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int len)
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{
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int count = len;
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count += sizeof(struct xfs_dir2_sf_entry); /* namelen + offset */
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count += hdr->i8count ? XFS_INO64_SIZE : XFS_INO32_SIZE; /* ino # */
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if (xfs_sb_version_hasftype(&mp->m_sb))
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count += sizeof(uint8_t);
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return count;
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}
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struct xfs_dir2_sf_entry *
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xfs_dir2_sf_nextentry(
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struct xfs_mount *mp,
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struct xfs_dir2_sf_hdr *hdr,
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struct xfs_dir2_sf_entry *sfep)
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{
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return (void *)sfep + xfs_dir2_sf_entsize(mp, hdr, sfep->namelen);
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}
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/*
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* Given a block directory (dp/block), calculate its size as a shortform (sf)
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* directory and a header for the sf directory, if it will fit it the
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@ -219,7 +244,7 @@ xfs_dir2_block_to_sf(
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dp->d_ops->sf_put_ftype(sfep,
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dp->d_ops->data_get_ftype(dep));
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sfep = dp->d_ops->sf_nextentry(sfp, sfep);
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sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep);
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}
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ptr += dp->d_ops->data_entsize(dep->namelen);
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}
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@ -285,7 +310,7 @@ xfs_dir2_sf_addname(
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/*
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* Compute entry (and change in) size.
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*/
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incr_isize = dp->d_ops->sf_entsize(sfp, args->namelen);
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incr_isize = xfs_dir2_sf_entsize(dp->i_mount, sfp, args->namelen);
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objchange = 0;
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/*
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@ -358,18 +383,17 @@ xfs_dir2_sf_addname_easy(
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xfs_dir2_data_aoff_t offset, /* offset to use for new ent */
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int new_isize) /* new directory size */
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{
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struct xfs_inode *dp = args->dp;
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struct xfs_mount *mp = dp->i_mount;
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int byteoff; /* byte offset in sf dir */
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xfs_inode_t *dp; /* incore directory inode */
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xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
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dp = args->dp;
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sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
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byteoff = (int)((char *)sfep - (char *)sfp);
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/*
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* Grow the in-inode space.
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*/
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xfs_idata_realloc(dp, dp->d_ops->sf_entsize(sfp, args->namelen),
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xfs_idata_realloc(dp, xfs_dir2_sf_entsize(mp, sfp, args->namelen),
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XFS_DATA_FORK);
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/*
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* Need to set up again due to realloc of the inode data.
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@ -410,9 +434,10 @@ xfs_dir2_sf_addname_hard(
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int objchange, /* changing inode number size */
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int new_isize) /* new directory size */
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{
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struct xfs_inode *dp = args->dp;
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struct xfs_mount *mp = dp->i_mount;
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int add_datasize; /* data size need for new ent */
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char *buf; /* buffer for old */
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xfs_inode_t *dp; /* incore directory inode */
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int eof; /* reached end of old dir */
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int nbytes; /* temp for byte copies */
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xfs_dir2_data_aoff_t new_offset; /* next offset value */
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@ -426,8 +451,6 @@ xfs_dir2_sf_addname_hard(
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/*
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* Copy the old directory to the stack buffer.
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*/
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dp = args->dp;
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sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
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old_isize = (int)dp->i_d.di_size;
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buf = kmem_alloc(old_isize, 0);
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@ -444,7 +467,7 @@ xfs_dir2_sf_addname_hard(
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eof = (char *)oldsfep == &buf[old_isize];
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!eof;
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offset = new_offset + dp->d_ops->data_entsize(oldsfep->namelen),
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oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep),
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oldsfep = xfs_dir2_sf_nextentry(mp, oldsfp, oldsfep),
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eof = (char *)oldsfep == &buf[old_isize]) {
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new_offset = xfs_dir2_sf_get_offset(oldsfep);
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if (offset + add_datasize <= new_offset)
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@ -482,7 +505,7 @@ xfs_dir2_sf_addname_hard(
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* If there's more left to copy, do that.
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*/
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if (!eof) {
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sfep = dp->d_ops->sf_nextentry(sfp, sfep);
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sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep);
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memcpy(sfep, oldsfep, old_isize - nbytes);
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}
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kmem_free(buf);
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@ -504,7 +527,8 @@ xfs_dir2_sf_addname_pick(
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xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */
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xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */
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{
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xfs_inode_t *dp; /* incore directory inode */
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struct xfs_inode *dp = args->dp;
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struct xfs_mount *mp = dp->i_mount;
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int holefit; /* found hole it will fit in */
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int i; /* entry number */
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xfs_dir2_data_aoff_t offset; /* data block offset */
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@ -513,8 +537,6 @@ xfs_dir2_sf_addname_pick(
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int size; /* entry's data size */
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int used; /* data bytes used */
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dp = args->dp;
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sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
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size = dp->d_ops->data_entsize(args->namelen);
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offset = dp->d_ops->data_first_offset;
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@ -530,7 +552,7 @@ xfs_dir2_sf_addname_pick(
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holefit = offset + size <= xfs_dir2_sf_get_offset(sfep);
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offset = xfs_dir2_sf_get_offset(sfep) +
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dp->d_ops->data_entsize(sfep->namelen);
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sfep = dp->d_ops->sf_nextentry(sfp, sfep);
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sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep);
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}
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/*
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* Calculate data bytes used excluding the new entry, if this
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@ -589,7 +611,7 @@ xfs_dir2_sf_check(
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for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
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i < sfp->count;
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i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) {
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i++, sfep = xfs_dir2_sf_nextentry(dp->i_mount, sfp, sfep)) {
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ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset);
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ino = dp->d_ops->sf_get_ino(sfp, sfep);
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i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
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@ -674,7 +696,7 @@ xfs_dir2_sf_verify(
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* within the data buffer. The next entry starts after the
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* name component, so nextentry is an acceptable test.
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*/
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next_sfep = dops->sf_nextentry(sfp, sfep);
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next_sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep);
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if (endp < (char *)next_sfep)
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return __this_address;
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@ -773,7 +795,8 @@ int /* error */
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xfs_dir2_sf_lookup(
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xfs_da_args_t *args) /* operation arguments */
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{
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xfs_inode_t *dp; /* incore directory inode */
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struct xfs_inode *dp = args->dp;
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struct xfs_mount *mp = dp->i_mount;
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int i; /* entry index */
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int error;
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xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
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@ -784,7 +807,6 @@ xfs_dir2_sf_lookup(
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trace_xfs_dir2_sf_lookup(args);
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xfs_dir2_sf_check(args);
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dp = args->dp;
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ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
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ASSERT(dp->i_d.di_size >= offsetof(struct xfs_dir2_sf_hdr, parent));
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@ -816,7 +838,7 @@ xfs_dir2_sf_lookup(
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*/
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ci_sfep = NULL;
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for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
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i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) {
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i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep)) {
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/*
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* Compare name and if it's an exact match, return the inode
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* number. If it's the first case-insensitive match, store the
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@ -852,8 +874,9 @@ int /* error */
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xfs_dir2_sf_removename(
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xfs_da_args_t *args)
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{
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struct xfs_inode *dp = args->dp;
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struct xfs_mount *mp = dp->i_mount;
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int byteoff; /* offset of removed entry */
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xfs_inode_t *dp; /* incore directory inode */
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int entsize; /* this entry's size */
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int i; /* shortform entry index */
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int newsize; /* new inode size */
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@ -863,8 +886,6 @@ xfs_dir2_sf_removename(
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trace_xfs_dir2_sf_removename(args);
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dp = args->dp;
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ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
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oldsize = (int)dp->i_d.di_size;
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ASSERT(oldsize >= offsetof(struct xfs_dir2_sf_hdr, parent));
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@ -877,7 +898,7 @@ xfs_dir2_sf_removename(
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* Find the one we're deleting.
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*/
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for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
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i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) {
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i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep)) {
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if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
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XFS_CMP_EXACT) {
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ASSERT(dp->d_ops->sf_get_ino(sfp, sfep) ==
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@ -894,7 +915,7 @@ xfs_dir2_sf_removename(
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* Calculate sizes.
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*/
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byteoff = (int)((char *)sfep - (char *)sfp);
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entsize = dp->d_ops->sf_entsize(sfp, args->namelen);
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entsize = xfs_dir2_sf_entsize(mp, sfp, args->namelen);
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newsize = oldsize - entsize;
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/*
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* Copy the part if any after the removed entry, sliding it down.
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@ -933,7 +954,8 @@ int /* error */
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xfs_dir2_sf_replace(
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xfs_da_args_t *args) /* operation arguments */
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{
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xfs_inode_t *dp; /* incore directory inode */
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struct xfs_inode *dp = args->dp;
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struct xfs_mount *mp = dp->i_mount;
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int i; /* entry index */
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xfs_ino_t ino=0; /* entry old inode number */
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int i8elevated; /* sf_toino8 set i8count=1 */
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@ -942,8 +964,6 @@ xfs_dir2_sf_replace(
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trace_xfs_dir2_sf_replace(args);
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dp = args->dp;
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ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
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ASSERT(dp->i_d.di_size >= offsetof(struct xfs_dir2_sf_hdr, parent));
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ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
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@ -993,7 +1013,7 @@ xfs_dir2_sf_replace(
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*/
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else {
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for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
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i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) {
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i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep)) {
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if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
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XFS_CMP_EXACT) {
|
||||
ino = dp->d_ops->sf_get_ino(sfp, sfep);
|
||||
|
|
@ -1052,8 +1072,9 @@ static void
|
|||
xfs_dir2_sf_toino4(
|
||||
xfs_da_args_t *args) /* operation arguments */
|
||||
{
|
||||
struct xfs_inode *dp = args->dp;
|
||||
struct xfs_mount *mp = dp->i_mount;
|
||||
char *buf; /* old dir's buffer */
|
||||
xfs_inode_t *dp; /* incore directory inode */
|
||||
int i; /* entry index */
|
||||
int newsize; /* new inode size */
|
||||
xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
|
||||
|
|
@ -1064,8 +1085,6 @@ xfs_dir2_sf_toino4(
|
|||
|
||||
trace_xfs_dir2_sf_toino4(args);
|
||||
|
||||
dp = args->dp;
|
||||
|
||||
/*
|
||||
* Copy the old directory to the buffer.
|
||||
* Then nuke it from the inode, and add the new buffer to the inode.
|
||||
|
|
@ -1099,8 +1118,8 @@ xfs_dir2_sf_toino4(
|
|||
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
|
||||
oldsfep = xfs_dir2_sf_firstentry(oldsfp);
|
||||
i < sfp->count;
|
||||
i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep),
|
||||
oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) {
|
||||
i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep),
|
||||
oldsfep = xfs_dir2_sf_nextentry(mp, oldsfp, oldsfep)) {
|
||||
sfep->namelen = oldsfep->namelen;
|
||||
memcpy(sfep->offset, oldsfep->offset, sizeof(sfep->offset));
|
||||
memcpy(sfep->name, oldsfep->name, sfep->namelen);
|
||||
|
|
@ -1125,8 +1144,9 @@ static void
|
|||
xfs_dir2_sf_toino8(
|
||||
xfs_da_args_t *args) /* operation arguments */
|
||||
{
|
||||
struct xfs_inode *dp = args->dp;
|
||||
struct xfs_mount *mp = dp->i_mount;
|
||||
char *buf; /* old dir's buffer */
|
||||
xfs_inode_t *dp; /* incore directory inode */
|
||||
int i; /* entry index */
|
||||
int newsize; /* new inode size */
|
||||
xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
|
||||
|
|
@ -1137,8 +1157,6 @@ xfs_dir2_sf_toino8(
|
|||
|
||||
trace_xfs_dir2_sf_toino8(args);
|
||||
|
||||
dp = args->dp;
|
||||
|
||||
/*
|
||||
* Copy the old directory to the buffer.
|
||||
* Then nuke it from the inode, and add the new buffer to the inode.
|
||||
|
|
@ -1172,8 +1190,8 @@ xfs_dir2_sf_toino8(
|
|||
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
|
||||
oldsfep = xfs_dir2_sf_firstentry(oldsfp);
|
||||
i < sfp->count;
|
||||
i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep),
|
||||
oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) {
|
||||
i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep),
|
||||
oldsfep = xfs_dir2_sf_nextentry(mp, oldsfp, oldsfep)) {
|
||||
sfep->namelen = oldsfep->namelen;
|
||||
memcpy(sfep->offset, oldsfep->offset, sizeof(sfep->offset));
|
||||
memcpy(sfep->name, oldsfep->name, sfep->namelen);
|
||||
|
|
|
|||
|
|
@ -48,6 +48,7 @@ xfs_dir2_sf_getdents(
|
|||
{
|
||||
int i; /* shortform entry number */
|
||||
struct xfs_inode *dp = args->dp; /* incore directory inode */
|
||||
struct xfs_mount *mp = dp->i_mount;
|
||||
xfs_dir2_dataptr_t off; /* current entry's offset */
|
||||
xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
|
||||
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
|
||||
|
|
@ -109,7 +110,7 @@ xfs_dir2_sf_getdents(
|
|||
xfs_dir2_sf_get_offset(sfep));
|
||||
|
||||
if (ctx->pos > off) {
|
||||
sfep = dp->d_ops->sf_nextentry(sfp, sfep);
|
||||
sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep);
|
||||
continue;
|
||||
}
|
||||
|
||||
|
|
@ -122,9 +123,9 @@ xfs_dir2_sf_getdents(
|
|||
return -EFSCORRUPTED;
|
||||
}
|
||||
if (!dir_emit(ctx, (char *)sfep->name, sfep->namelen, ino,
|
||||
xfs_dir3_get_dtype(dp->i_mount, filetype)))
|
||||
xfs_dir3_get_dtype(mp, filetype)))
|
||||
return 0;
|
||||
sfep = dp->d_ops->sf_nextentry(sfp, sfep);
|
||||
sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep);
|
||||
}
|
||||
|
||||
ctx->pos = xfs_dir2_db_off_to_dataptr(geo, geo->datablk + 1, 0) &
|
||||
|
|
|
|||
Loading…
Reference in New Issue