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1293 lines
37 KiB
1293 lines
37 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
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* All Rights Reserved. |
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*/ |
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#include "xfs.h" |
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#include "xfs_fs.h" |
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#include "xfs_shared.h" |
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#include "xfs_format.h" |
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#include "xfs_log_format.h" |
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#include "xfs_trans_resv.h" |
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#include "xfs_mount.h" |
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#include "xfs_inode.h" |
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#include "xfs_trans.h" |
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#include "xfs_dir2.h" |
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#include "xfs_dir2_priv.h" |
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#include "xfs_trace.h" |
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|
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/* |
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* Prototypes for internal functions. |
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*/ |
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static void xfs_dir2_sf_addname_easy(xfs_da_args_t *args, |
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xfs_dir2_sf_entry_t *sfep, |
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xfs_dir2_data_aoff_t offset, |
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int new_isize); |
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static void xfs_dir2_sf_addname_hard(xfs_da_args_t *args, int objchange, |
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int new_isize); |
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static int xfs_dir2_sf_addname_pick(xfs_da_args_t *args, int objchange, |
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xfs_dir2_sf_entry_t **sfepp, |
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xfs_dir2_data_aoff_t *offsetp); |
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#ifdef DEBUG |
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static void xfs_dir2_sf_check(xfs_da_args_t *args); |
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#else |
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#define xfs_dir2_sf_check(args) |
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#endif /* DEBUG */ |
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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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|
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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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|
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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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|
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if (xfs_has_ftype(mp)) |
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count += sizeof(uint8_t); |
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return count; |
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} |
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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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/* |
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* In short-form directory entries the inode numbers are stored at variable |
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* offset behind the entry name. If the entry stores a filetype value, then it |
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* sits between the name and the inode number. The actual inode numbers can |
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* come in two formats as well, either 4 bytes or 8 bytes wide. |
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*/ |
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xfs_ino_t |
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xfs_dir2_sf_get_ino( |
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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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uint8_t *from = sfep->name + sfep->namelen; |
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|
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if (xfs_has_ftype(mp)) |
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from++; |
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|
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if (!hdr->i8count) |
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return get_unaligned_be32(from); |
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return get_unaligned_be64(from) & XFS_MAXINUMBER; |
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} |
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|
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void |
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xfs_dir2_sf_put_ino( |
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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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xfs_ino_t ino) |
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{ |
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uint8_t *to = sfep->name + sfep->namelen; |
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|
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ASSERT(ino <= XFS_MAXINUMBER); |
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|
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if (xfs_has_ftype(mp)) |
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to++; |
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|
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if (hdr->i8count) |
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put_unaligned_be64(ino, to); |
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else |
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put_unaligned_be32(ino, to); |
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} |
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|
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xfs_ino_t |
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xfs_dir2_sf_get_parent_ino( |
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struct xfs_dir2_sf_hdr *hdr) |
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{ |
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if (!hdr->i8count) |
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return get_unaligned_be32(hdr->parent); |
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return get_unaligned_be64(hdr->parent) & XFS_MAXINUMBER; |
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} |
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|
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void |
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xfs_dir2_sf_put_parent_ino( |
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struct xfs_dir2_sf_hdr *hdr, |
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xfs_ino_t ino) |
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{ |
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ASSERT(ino <= XFS_MAXINUMBER); |
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|
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if (hdr->i8count) |
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put_unaligned_be64(ino, hdr->parent); |
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else |
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put_unaligned_be32(ino, hdr->parent); |
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} |
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|
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/* |
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* The file type field is stored at the end of the name for filetype enabled |
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* shortform directories, or not at all otherwise. |
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*/ |
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uint8_t |
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xfs_dir2_sf_get_ftype( |
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struct xfs_mount *mp, |
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struct xfs_dir2_sf_entry *sfep) |
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{ |
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if (xfs_has_ftype(mp)) { |
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uint8_t ftype = sfep->name[sfep->namelen]; |
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|
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if (ftype < XFS_DIR3_FT_MAX) |
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return ftype; |
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} |
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|
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return XFS_DIR3_FT_UNKNOWN; |
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} |
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|
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void |
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xfs_dir2_sf_put_ftype( |
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struct xfs_mount *mp, |
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struct xfs_dir2_sf_entry *sfep, |
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uint8_t ftype) |
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{ |
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ASSERT(ftype < XFS_DIR3_FT_MAX); |
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|
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if (xfs_has_ftype(mp)) |
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sfep->name[sfep->namelen] = ftype; |
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} |
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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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* space currently present in the inode. If it won't fit, the output |
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* size is too big (but not accurate). |
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*/ |
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int /* size for sf form */ |
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xfs_dir2_block_sfsize( |
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xfs_inode_t *dp, /* incore inode pointer */ |
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xfs_dir2_data_hdr_t *hdr, /* block directory data */ |
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xfs_dir2_sf_hdr_t *sfhp) /* output: header for sf form */ |
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{ |
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xfs_dir2_dataptr_t addr; /* data entry address */ |
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xfs_dir2_leaf_entry_t *blp; /* leaf area of the block */ |
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xfs_dir2_block_tail_t *btp; /* tail area of the block */ |
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int count; /* shortform entry count */ |
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xfs_dir2_data_entry_t *dep; /* data entry in the block */ |
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int i; /* block entry index */ |
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int i8count; /* count of big-inode entries */ |
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int isdot; /* entry is "." */ |
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int isdotdot; /* entry is ".." */ |
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xfs_mount_t *mp; /* mount structure pointer */ |
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int namelen; /* total name bytes */ |
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xfs_ino_t parent = 0; /* parent inode number */ |
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int size=0; /* total computed size */ |
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int has_ftype; |
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struct xfs_da_geometry *geo; |
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|
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mp = dp->i_mount; |
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geo = mp->m_dir_geo; |
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|
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/* |
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* if there is a filetype field, add the extra byte to the namelen |
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* for each entry that we see. |
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*/ |
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has_ftype = xfs_has_ftype(mp) ? 1 : 0; |
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|
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count = i8count = namelen = 0; |
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btp = xfs_dir2_block_tail_p(geo, hdr); |
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blp = xfs_dir2_block_leaf_p(btp); |
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|
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/* |
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* Iterate over the block's data entries by using the leaf pointers. |
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*/ |
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for (i = 0; i < be32_to_cpu(btp->count); i++) { |
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if ((addr = be32_to_cpu(blp[i].address)) == XFS_DIR2_NULL_DATAPTR) |
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continue; |
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/* |
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* Calculate the pointer to the entry at hand. |
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*/ |
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dep = (xfs_dir2_data_entry_t *)((char *)hdr + |
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xfs_dir2_dataptr_to_off(geo, addr)); |
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/* |
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* Detect . and .., so we can special-case them. |
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* . is not included in sf directories. |
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* .. is included by just the parent inode number. |
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*/ |
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isdot = dep->namelen == 1 && dep->name[0] == '.'; |
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isdotdot = |
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dep->namelen == 2 && |
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dep->name[0] == '.' && dep->name[1] == '.'; |
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|
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if (!isdot) |
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i8count += be64_to_cpu(dep->inumber) > XFS_DIR2_MAX_SHORT_INUM; |
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|
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/* take into account the file type field */ |
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if (!isdot && !isdotdot) { |
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count++; |
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namelen += dep->namelen + has_ftype; |
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} else if (isdotdot) |
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parent = be64_to_cpu(dep->inumber); |
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/* |
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* Calculate the new size, see if we should give up yet. |
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*/ |
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size = xfs_dir2_sf_hdr_size(i8count) + /* header */ |
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count * 3 * sizeof(u8) + /* namelen + offset */ |
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namelen + /* name */ |
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(i8count ? /* inumber */ |
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count * XFS_INO64_SIZE : |
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count * XFS_INO32_SIZE); |
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if (size > xfs_inode_data_fork_size(dp)) |
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return size; /* size value is a failure */ |
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} |
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/* |
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* Create the output header, if it worked. |
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*/ |
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sfhp->count = count; |
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sfhp->i8count = i8count; |
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xfs_dir2_sf_put_parent_ino(sfhp, parent); |
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return size; |
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} |
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|
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/* |
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* Convert a block format directory to shortform. |
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* Caller has already checked that it will fit, and built us a header. |
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*/ |
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int /* error */ |
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xfs_dir2_block_to_sf( |
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struct xfs_da_args *args, /* operation arguments */ |
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struct xfs_buf *bp, |
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int size, /* shortform directory size */ |
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struct xfs_dir2_sf_hdr *sfhp) /* shortform directory hdr */ |
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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 error; /* error return value */ |
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int logflags; /* inode logging flags */ |
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struct xfs_dir2_sf_entry *sfep; /* shortform entry */ |
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struct xfs_dir2_sf_hdr *sfp; /* shortform directory header */ |
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unsigned int offset = args->geo->data_entry_offset; |
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unsigned int end; |
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|
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trace_xfs_dir2_block_to_sf(args); |
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|
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/* |
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* Allocate a temporary destination buffer the size of the inode to |
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* format the data into. Once we have formatted the data, we can free |
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* the block and copy the formatted data into the inode literal area. |
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*/ |
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sfp = kmem_alloc(mp->m_sb.sb_inodesize, 0); |
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memcpy(sfp, sfhp, xfs_dir2_sf_hdr_size(sfhp->i8count)); |
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|
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/* |
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* Loop over the active and unused entries. Stop when we reach the |
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* leaf/tail portion of the block. |
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*/ |
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end = xfs_dir3_data_end_offset(args->geo, bp->b_addr); |
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sfep = xfs_dir2_sf_firstentry(sfp); |
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while (offset < end) { |
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struct xfs_dir2_data_unused *dup = bp->b_addr + offset; |
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struct xfs_dir2_data_entry *dep = bp->b_addr + offset; |
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|
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/* |
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* If it's unused, just skip over it. |
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*/ |
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if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) { |
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offset += be16_to_cpu(dup->length); |
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continue; |
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} |
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|
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/* |
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* Skip . |
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*/ |
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if (dep->namelen == 1 && dep->name[0] == '.') |
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ASSERT(be64_to_cpu(dep->inumber) == dp->i_ino); |
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/* |
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* Skip .., but make sure the inode number is right. |
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*/ |
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else if (dep->namelen == 2 && |
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dep->name[0] == '.' && dep->name[1] == '.') |
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ASSERT(be64_to_cpu(dep->inumber) == |
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xfs_dir2_sf_get_parent_ino(sfp)); |
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/* |
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* Normal entry, copy it into shortform. |
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*/ |
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else { |
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sfep->namelen = dep->namelen; |
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xfs_dir2_sf_put_offset(sfep, offset); |
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memcpy(sfep->name, dep->name, dep->namelen); |
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xfs_dir2_sf_put_ino(mp, sfp, sfep, |
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be64_to_cpu(dep->inumber)); |
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xfs_dir2_sf_put_ftype(mp, sfep, |
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xfs_dir2_data_get_ftype(mp, dep)); |
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|
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sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep); |
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} |
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offset += xfs_dir2_data_entsize(mp, dep->namelen); |
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} |
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ASSERT((char *)sfep - (char *)sfp == size); |
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|
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/* now we are done with the block, we can shrink the inode */ |
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logflags = XFS_ILOG_CORE; |
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error = xfs_dir2_shrink_inode(args, args->geo->datablk, bp); |
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if (error) { |
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ASSERT(error != -ENOSPC); |
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goto out; |
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} |
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|
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/* |
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* The buffer is now unconditionally gone, whether |
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* xfs_dir2_shrink_inode worked or not. |
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* |
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* Convert the inode to local format and copy the data in. |
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*/ |
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ASSERT(dp->i_df.if_bytes == 0); |
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xfs_init_local_fork(dp, XFS_DATA_FORK, sfp, size); |
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dp->i_df.if_format = XFS_DINODE_FMT_LOCAL; |
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dp->i_disk_size = size; |
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|
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logflags |= XFS_ILOG_DDATA; |
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xfs_dir2_sf_check(args); |
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out: |
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xfs_trans_log_inode(args->trans, dp, logflags); |
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kmem_free(sfp); |
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return error; |
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} |
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|
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/* |
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* Add a name to a shortform directory. |
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* There are two algorithms, "easy" and "hard" which we decide on |
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* before changing anything. |
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* Convert to block form if necessary, if the new entry won't fit. |
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*/ |
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int /* error */ |
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xfs_dir2_sf_addname( |
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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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int error; /* error return value */ |
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int incr_isize; /* total change in size */ |
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int new_isize; /* size after adding name */ |
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int objchange; /* changing to 8-byte inodes */ |
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xfs_dir2_data_aoff_t offset = 0; /* offset for new entry */ |
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int pick; /* which algorithm to use */ |
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xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
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xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */ |
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|
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trace_xfs_dir2_sf_addname(args); |
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|
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ASSERT(xfs_dir2_sf_lookup(args) == -ENOENT); |
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dp = args->dp; |
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ASSERT(dp->i_df.if_format == XFS_DINODE_FMT_LOCAL); |
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ASSERT(dp->i_disk_size >= offsetof(struct xfs_dir2_sf_hdr, parent)); |
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ASSERT(dp->i_df.if_bytes == dp->i_disk_size); |
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ASSERT(dp->i_df.if_u1.if_data != NULL); |
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sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
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ASSERT(dp->i_disk_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); |
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/* |
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* Compute entry (and change in) size. |
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*/ |
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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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* Do we have to change to 8 byte inodes? |
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*/ |
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if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { |
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/* |
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* Yes, adjust the inode size. old count + (parent + new) |
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*/ |
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incr_isize += (sfp->count + 2) * XFS_INO64_DIFF; |
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objchange = 1; |
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} |
|
|
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new_isize = (int)dp->i_disk_size + incr_isize; |
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/* |
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* Won't fit as shortform any more (due to size), |
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* or the pick routine says it won't (due to offset values). |
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*/ |
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if (new_isize > xfs_inode_data_fork_size(dp) || |
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(pick = |
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xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) { |
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/* |
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* Just checking or no space reservation, it doesn't fit. |
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*/ |
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if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0) |
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return -ENOSPC; |
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/* |
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* Convert to block form then add the name. |
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*/ |
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error = xfs_dir2_sf_to_block(args); |
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if (error) |
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return error; |
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return xfs_dir2_block_addname(args); |
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} |
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/* |
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* Just checking, it fits. |
|
*/ |
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if (args->op_flags & XFS_DA_OP_JUSTCHECK) |
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return 0; |
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/* |
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* Do it the easy way - just add it at the end. |
|
*/ |
|
if (pick == 1) |
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xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize); |
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/* |
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* Do it the hard way - look for a place to insert the new entry. |
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* Convert to 8 byte inode numbers first if necessary. |
|
*/ |
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else { |
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ASSERT(pick == 2); |
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if (objchange) |
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xfs_dir2_sf_toino8(args); |
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xfs_dir2_sf_addname_hard(args, objchange, new_isize); |
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} |
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xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); |
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return 0; |
|
} |
|
|
|
/* |
|
* Add the new entry the "easy" way. |
|
* This is copying the old directory and adding the new entry at the end. |
|
* Since it's sorted by "offset" we need room after the last offset |
|
* that's already there, and then room to convert to a block directory. |
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* This is already checked by the pick routine. |
|
*/ |
|
static void |
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xfs_dir2_sf_addname_easy( |
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xfs_da_args_t *args, /* operation arguments */ |
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xfs_dir2_sf_entry_t *sfep, /* pointer to new entry */ |
|
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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struct xfs_inode *dp = args->dp; |
|
struct xfs_mount *mp = dp->i_mount; |
|
int byteoff; /* byte offset in sf dir */ |
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xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
|
|
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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); |
|
/* |
|
* Grow the in-inode space. |
|
*/ |
|
xfs_idata_realloc(dp, xfs_dir2_sf_entsize(mp, sfp, args->namelen), |
|
XFS_DATA_FORK); |
|
/* |
|
* Need to set up again due to realloc of the inode data. |
|
*/ |
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
|
sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff); |
|
/* |
|
* Fill in the new entry. |
|
*/ |
|
sfep->namelen = args->namelen; |
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xfs_dir2_sf_put_offset(sfep, offset); |
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memcpy(sfep->name, args->name, sfep->namelen); |
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xfs_dir2_sf_put_ino(mp, sfp, sfep, args->inumber); |
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xfs_dir2_sf_put_ftype(mp, sfep, args->filetype); |
|
|
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/* |
|
* Update the header and inode. |
|
*/ |
|
sfp->count++; |
|
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) |
|
sfp->i8count++; |
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dp->i_disk_size = new_isize; |
|
xfs_dir2_sf_check(args); |
|
} |
|
|
|
/* |
|
* Add the new entry the "hard" way. |
|
* The caller has already converted to 8 byte inode numbers if necessary, |
|
* in which case we need to leave the i8count at 1. |
|
* Find a hole that the new entry will fit into, and copy |
|
* the first part of the entries, the new entry, and the last part of |
|
* the entries. |
|
*/ |
|
/* ARGSUSED */ |
|
static void |
|
xfs_dir2_sf_addname_hard( |
|
xfs_da_args_t *args, /* operation arguments */ |
|
int objchange, /* changing inode number size */ |
|
int new_isize) /* new directory size */ |
|
{ |
|
struct xfs_inode *dp = args->dp; |
|
struct xfs_mount *mp = dp->i_mount; |
|
int add_datasize; /* data size need for new ent */ |
|
char *buf; /* buffer for old */ |
|
int eof; /* reached end of old dir */ |
|
int nbytes; /* temp for byte copies */ |
|
xfs_dir2_data_aoff_t new_offset; /* next offset value */ |
|
xfs_dir2_data_aoff_t offset; /* current offset value */ |
|
int old_isize; /* previous size */ |
|
xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */ |
|
xfs_dir2_sf_hdr_t *oldsfp; /* original shortform dir */ |
|
xfs_dir2_sf_entry_t *sfep; /* entry in new dir */ |
|
xfs_dir2_sf_hdr_t *sfp; /* new shortform dir */ |
|
|
|
/* |
|
* Copy the old directory to the stack buffer. |
|
*/ |
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
|
old_isize = (int)dp->i_disk_size; |
|
buf = kmem_alloc(old_isize, 0); |
|
oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
|
memcpy(oldsfp, sfp, old_isize); |
|
/* |
|
* Loop over the old directory finding the place we're going |
|
* to insert the new entry. |
|
* If it's going to end up at the end then oldsfep will point there. |
|
*/ |
|
for (offset = args->geo->data_first_offset, |
|
oldsfep = xfs_dir2_sf_firstentry(oldsfp), |
|
add_datasize = xfs_dir2_data_entsize(mp, args->namelen), |
|
eof = (char *)oldsfep == &buf[old_isize]; |
|
!eof; |
|
offset = new_offset + xfs_dir2_data_entsize(mp, oldsfep->namelen), |
|
oldsfep = xfs_dir2_sf_nextentry(mp, oldsfp, oldsfep), |
|
eof = (char *)oldsfep == &buf[old_isize]) { |
|
new_offset = xfs_dir2_sf_get_offset(oldsfep); |
|
if (offset + add_datasize <= new_offset) |
|
break; |
|
} |
|
/* |
|
* Get rid of the old directory, then allocate space for |
|
* the new one. We do this so xfs_idata_realloc won't copy |
|
* the data. |
|
*/ |
|
xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK); |
|
xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK); |
|
/* |
|
* Reset the pointer since the buffer was reallocated. |
|
*/ |
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
|
/* |
|
* Copy the first part of the directory, including the header. |
|
*/ |
|
nbytes = (int)((char *)oldsfep - (char *)oldsfp); |
|
memcpy(sfp, oldsfp, nbytes); |
|
sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes); |
|
/* |
|
* Fill in the new entry, and update the header counts. |
|
*/ |
|
sfep->namelen = args->namelen; |
|
xfs_dir2_sf_put_offset(sfep, offset); |
|
memcpy(sfep->name, args->name, sfep->namelen); |
|
xfs_dir2_sf_put_ino(mp, sfp, sfep, args->inumber); |
|
xfs_dir2_sf_put_ftype(mp, sfep, args->filetype); |
|
sfp->count++; |
|
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange) |
|
sfp->i8count++; |
|
/* |
|
* If there's more left to copy, do that. |
|
*/ |
|
if (!eof) { |
|
sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep); |
|
memcpy(sfep, oldsfep, old_isize - nbytes); |
|
} |
|
kmem_free(buf); |
|
dp->i_disk_size = new_isize; |
|
xfs_dir2_sf_check(args); |
|
} |
|
|
|
/* |
|
* Decide if the new entry will fit at all. |
|
* If it will fit, pick between adding the new entry to the end (easy) |
|
* or somewhere else (hard). |
|
* Return 0 (won't fit), 1 (easy), 2 (hard). |
|
*/ |
|
/*ARGSUSED*/ |
|
static int /* pick result */ |
|
xfs_dir2_sf_addname_pick( |
|
xfs_da_args_t *args, /* operation arguments */ |
|
int objchange, /* inode # size changes */ |
|
xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */ |
|
xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */ |
|
{ |
|
struct xfs_inode *dp = args->dp; |
|
struct xfs_mount *mp = dp->i_mount; |
|
int holefit; /* found hole it will fit in */ |
|
int i; /* entry number */ |
|
xfs_dir2_data_aoff_t offset; /* data block offset */ |
|
xfs_dir2_sf_entry_t *sfep; /* shortform entry */ |
|
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
|
int size; /* entry's data size */ |
|
int used; /* data bytes used */ |
|
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
|
size = xfs_dir2_data_entsize(mp, args->namelen); |
|
offset = args->geo->data_first_offset; |
|
sfep = xfs_dir2_sf_firstentry(sfp); |
|
holefit = 0; |
|
/* |
|
* Loop over sf entries. |
|
* Keep track of data offset and whether we've seen a place |
|
* to insert the new entry. |
|
*/ |
|
for (i = 0; i < sfp->count; i++) { |
|
if (!holefit) |
|
holefit = offset + size <= xfs_dir2_sf_get_offset(sfep); |
|
offset = xfs_dir2_sf_get_offset(sfep) + |
|
xfs_dir2_data_entsize(mp, sfep->namelen); |
|
sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep); |
|
} |
|
/* |
|
* Calculate data bytes used excluding the new entry, if this |
|
* was a data block (block form directory). |
|
*/ |
|
used = offset + |
|
(sfp->count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) + |
|
(uint)sizeof(xfs_dir2_block_tail_t); |
|
/* |
|
* If it won't fit in a block form then we can't insert it, |
|
* we'll go back, convert to block, then try the insert and convert |
|
* to leaf. |
|
*/ |
|
if (used + (holefit ? 0 : size) > args->geo->blksize) |
|
return 0; |
|
/* |
|
* If changing the inode number size, do it the hard way. |
|
*/ |
|
if (objchange) |
|
return 2; |
|
/* |
|
* If it won't fit at the end then do it the hard way (use the hole). |
|
*/ |
|
if (used + size > args->geo->blksize) |
|
return 2; |
|
/* |
|
* Do it the easy way. |
|
*/ |
|
*sfepp = sfep; |
|
*offsetp = offset; |
|
return 1; |
|
} |
|
|
|
#ifdef DEBUG |
|
/* |
|
* Check consistency of shortform directory, assert if bad. |
|
*/ |
|
static void |
|
xfs_dir2_sf_check( |
|
xfs_da_args_t *args) /* operation arguments */ |
|
{ |
|
struct xfs_inode *dp = args->dp; |
|
struct xfs_mount *mp = dp->i_mount; |
|
int i; /* entry number */ |
|
int i8count; /* number of big inode#s */ |
|
xfs_ino_t ino; /* entry inode number */ |
|
int offset; /* data offset */ |
|
xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */ |
|
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
|
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
|
offset = args->geo->data_first_offset; |
|
ino = xfs_dir2_sf_get_parent_ino(sfp); |
|
i8count = ino > XFS_DIR2_MAX_SHORT_INUM; |
|
|
|
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); |
|
i < sfp->count; |
|
i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep)) { |
|
ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset); |
|
ino = xfs_dir2_sf_get_ino(mp, sfp, sfep); |
|
i8count += ino > XFS_DIR2_MAX_SHORT_INUM; |
|
offset = |
|
xfs_dir2_sf_get_offset(sfep) + |
|
xfs_dir2_data_entsize(mp, sfep->namelen); |
|
ASSERT(xfs_dir2_sf_get_ftype(mp, sfep) < XFS_DIR3_FT_MAX); |
|
} |
|
ASSERT(i8count == sfp->i8count); |
|
ASSERT((char *)sfep - (char *)sfp == dp->i_disk_size); |
|
ASSERT(offset + |
|
(sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) + |
|
(uint)sizeof(xfs_dir2_block_tail_t) <= args->geo->blksize); |
|
} |
|
#endif /* DEBUG */ |
|
|
|
/* Verify the consistency of an inline directory. */ |
|
xfs_failaddr_t |
|
xfs_dir2_sf_verify( |
|
struct xfs_inode *ip) |
|
{ |
|
struct xfs_mount *mp = ip->i_mount; |
|
struct xfs_ifork *ifp = xfs_ifork_ptr(ip, XFS_DATA_FORK); |
|
struct xfs_dir2_sf_hdr *sfp; |
|
struct xfs_dir2_sf_entry *sfep; |
|
struct xfs_dir2_sf_entry *next_sfep; |
|
char *endp; |
|
xfs_ino_t ino; |
|
int i; |
|
int i8count; |
|
int offset; |
|
int64_t size; |
|
int error; |
|
uint8_t filetype; |
|
|
|
ASSERT(ifp->if_format == XFS_DINODE_FMT_LOCAL); |
|
|
|
sfp = (struct xfs_dir2_sf_hdr *)ifp->if_u1.if_data; |
|
size = ifp->if_bytes; |
|
|
|
/* |
|
* Give up if the directory is way too short. |
|
*/ |
|
if (size <= offsetof(struct xfs_dir2_sf_hdr, parent) || |
|
size < xfs_dir2_sf_hdr_size(sfp->i8count)) |
|
return __this_address; |
|
|
|
endp = (char *)sfp + size; |
|
|
|
/* Check .. entry */ |
|
ino = xfs_dir2_sf_get_parent_ino(sfp); |
|
i8count = ino > XFS_DIR2_MAX_SHORT_INUM; |
|
error = xfs_dir_ino_validate(mp, ino); |
|
if (error) |
|
return __this_address; |
|
offset = mp->m_dir_geo->data_first_offset; |
|
|
|
/* Check all reported entries */ |
|
sfep = xfs_dir2_sf_firstentry(sfp); |
|
for (i = 0; i < sfp->count; i++) { |
|
/* |
|
* struct xfs_dir2_sf_entry has a variable length. |
|
* Check the fixed-offset parts of the structure are |
|
* within the data buffer. |
|
*/ |
|
if (((char *)sfep + sizeof(*sfep)) >= endp) |
|
return __this_address; |
|
|
|
/* Don't allow names with known bad length. */ |
|
if (sfep->namelen == 0) |
|
return __this_address; |
|
|
|
/* |
|
* Check that the variable-length part of the structure is |
|
* within the data buffer. The next entry starts after the |
|
* name component, so nextentry is an acceptable test. |
|
*/ |
|
next_sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep); |
|
if (endp < (char *)next_sfep) |
|
return __this_address; |
|
|
|
/* Check that the offsets always increase. */ |
|
if (xfs_dir2_sf_get_offset(sfep) < offset) |
|
return __this_address; |
|
|
|
/* Check the inode number. */ |
|
ino = xfs_dir2_sf_get_ino(mp, sfp, sfep); |
|
i8count += ino > XFS_DIR2_MAX_SHORT_INUM; |
|
error = xfs_dir_ino_validate(mp, ino); |
|
if (error) |
|
return __this_address; |
|
|
|
/* Check the file type. */ |
|
filetype = xfs_dir2_sf_get_ftype(mp, sfep); |
|
if (filetype >= XFS_DIR3_FT_MAX) |
|
return __this_address; |
|
|
|
offset = xfs_dir2_sf_get_offset(sfep) + |
|
xfs_dir2_data_entsize(mp, sfep->namelen); |
|
|
|
sfep = next_sfep; |
|
} |
|
if (i8count != sfp->i8count) |
|
return __this_address; |
|
if ((void *)sfep != (void *)endp) |
|
return __this_address; |
|
|
|
/* Make sure this whole thing ought to be in local format. */ |
|
if (offset + (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) + |
|
(uint)sizeof(xfs_dir2_block_tail_t) > mp->m_dir_geo->blksize) |
|
return __this_address; |
|
|
|
return NULL; |
|
} |
|
|
|
/* |
|
* Create a new (shortform) directory. |
|
*/ |
|
int /* error, always 0 */ |
|
xfs_dir2_sf_create( |
|
xfs_da_args_t *args, /* operation arguments */ |
|
xfs_ino_t pino) /* parent inode number */ |
|
{ |
|
xfs_inode_t *dp; /* incore directory inode */ |
|
int i8count; /* parent inode is an 8-byte number */ |
|
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
|
int size; /* directory size */ |
|
|
|
trace_xfs_dir2_sf_create(args); |
|
|
|
dp = args->dp; |
|
|
|
ASSERT(dp != NULL); |
|
ASSERT(dp->i_disk_size == 0); |
|
/* |
|
* If it's currently a zero-length extent file, |
|
* convert it to local format. |
|
*/ |
|
if (dp->i_df.if_format == XFS_DINODE_FMT_EXTENTS) { |
|
dp->i_df.if_format = XFS_DINODE_FMT_LOCAL; |
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); |
|
} |
|
ASSERT(dp->i_df.if_format == XFS_DINODE_FMT_LOCAL); |
|
ASSERT(dp->i_df.if_bytes == 0); |
|
i8count = pino > XFS_DIR2_MAX_SHORT_INUM; |
|
size = xfs_dir2_sf_hdr_size(i8count); |
|
/* |
|
* Make a buffer for the data. |
|
*/ |
|
xfs_idata_realloc(dp, size, XFS_DATA_FORK); |
|
/* |
|
* Fill in the header, |
|
*/ |
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
|
sfp->i8count = i8count; |
|
/* |
|
* Now can put in the inode number, since i8count is set. |
|
*/ |
|
xfs_dir2_sf_put_parent_ino(sfp, pino); |
|
sfp->count = 0; |
|
dp->i_disk_size = size; |
|
xfs_dir2_sf_check(args); |
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); |
|
return 0; |
|
} |
|
|
|
/* |
|
* Lookup an entry in a shortform directory. |
|
* Returns EEXIST if found, ENOENT if not found. |
|
*/ |
|
int /* error */ |
|
xfs_dir2_sf_lookup( |
|
xfs_da_args_t *args) /* operation arguments */ |
|
{ |
|
struct xfs_inode *dp = args->dp; |
|
struct xfs_mount *mp = dp->i_mount; |
|
int i; /* entry index */ |
|
xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ |
|
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
|
enum xfs_dacmp cmp; /* comparison result */ |
|
xfs_dir2_sf_entry_t *ci_sfep; /* case-insens. entry */ |
|
|
|
trace_xfs_dir2_sf_lookup(args); |
|
|
|
xfs_dir2_sf_check(args); |
|
|
|
ASSERT(dp->i_df.if_format == XFS_DINODE_FMT_LOCAL); |
|
ASSERT(dp->i_disk_size >= offsetof(struct xfs_dir2_sf_hdr, parent)); |
|
ASSERT(dp->i_df.if_bytes == dp->i_disk_size); |
|
ASSERT(dp->i_df.if_u1.if_data != NULL); |
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
|
ASSERT(dp->i_disk_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); |
|
/* |
|
* Special case for . |
|
*/ |
|
if (args->namelen == 1 && args->name[0] == '.') { |
|
args->inumber = dp->i_ino; |
|
args->cmpresult = XFS_CMP_EXACT; |
|
args->filetype = XFS_DIR3_FT_DIR; |
|
return -EEXIST; |
|
} |
|
/* |
|
* Special case for .. |
|
*/ |
|
if (args->namelen == 2 && |
|
args->name[0] == '.' && args->name[1] == '.') { |
|
args->inumber = xfs_dir2_sf_get_parent_ino(sfp); |
|
args->cmpresult = XFS_CMP_EXACT; |
|
args->filetype = XFS_DIR3_FT_DIR; |
|
return -EEXIST; |
|
} |
|
/* |
|
* Loop over all the entries trying to match ours. |
|
*/ |
|
ci_sfep = NULL; |
|
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
|
i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep)) { |
|
/* |
|
* Compare name and if it's an exact match, return the inode |
|
* number. If it's the first case-insensitive match, store the |
|
* inode number and continue looking for an exact match. |
|
*/ |
|
cmp = xfs_dir2_compname(args, sfep->name, sfep->namelen); |
|
if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) { |
|
args->cmpresult = cmp; |
|
args->inumber = xfs_dir2_sf_get_ino(mp, sfp, sfep); |
|
args->filetype = xfs_dir2_sf_get_ftype(mp, sfep); |
|
if (cmp == XFS_CMP_EXACT) |
|
return -EEXIST; |
|
ci_sfep = sfep; |
|
} |
|
} |
|
ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
|
/* |
|
* Here, we can only be doing a lookup (not a rename or replace). |
|
* If a case-insensitive match was not found, return -ENOENT. |
|
*/ |
|
if (!ci_sfep) |
|
return -ENOENT; |
|
/* otherwise process the CI match as required by the caller */ |
|
return xfs_dir_cilookup_result(args, ci_sfep->name, ci_sfep->namelen); |
|
} |
|
|
|
/* |
|
* Remove an entry from a shortform directory. |
|
*/ |
|
int /* error */ |
|
xfs_dir2_sf_removename( |
|
xfs_da_args_t *args) |
|
{ |
|
struct xfs_inode *dp = args->dp; |
|
struct xfs_mount *mp = dp->i_mount; |
|
int byteoff; /* offset of removed entry */ |
|
int entsize; /* this entry's size */ |
|
int i; /* shortform entry index */ |
|
int newsize; /* new inode size */ |
|
int oldsize; /* old inode size */ |
|
xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ |
|
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
|
|
|
trace_xfs_dir2_sf_removename(args); |
|
|
|
ASSERT(dp->i_df.if_format == XFS_DINODE_FMT_LOCAL); |
|
oldsize = (int)dp->i_disk_size; |
|
ASSERT(oldsize >= offsetof(struct xfs_dir2_sf_hdr, parent)); |
|
ASSERT(dp->i_df.if_bytes == oldsize); |
|
ASSERT(dp->i_df.if_u1.if_data != NULL); |
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
|
ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->i8count)); |
|
/* |
|
* Loop over the old directory entries. |
|
* Find the one we're deleting. |
|
*/ |
|
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
|
i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep)) { |
|
if (xfs_da_compname(args, sfep->name, sfep->namelen) == |
|
XFS_CMP_EXACT) { |
|
ASSERT(xfs_dir2_sf_get_ino(mp, sfp, sfep) == |
|
args->inumber); |
|
break; |
|
} |
|
} |
|
/* |
|
* Didn't find it. |
|
*/ |
|
if (i == sfp->count) |
|
return -ENOENT; |
|
/* |
|
* Calculate sizes. |
|
*/ |
|
byteoff = (int)((char *)sfep - (char *)sfp); |
|
entsize = xfs_dir2_sf_entsize(mp, sfp, args->namelen); |
|
newsize = oldsize - entsize; |
|
/* |
|
* Copy the part if any after the removed entry, sliding it down. |
|
*/ |
|
if (byteoff + entsize < oldsize) |
|
memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize, |
|
oldsize - (byteoff + entsize)); |
|
/* |
|
* Fix up the header and file size. |
|
*/ |
|
sfp->count--; |
|
dp->i_disk_size = newsize; |
|
/* |
|
* Reallocate, making it smaller. |
|
*/ |
|
xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK); |
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
|
/* |
|
* Are we changing inode number size? |
|
*/ |
|
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) { |
|
if (sfp->i8count == 1) |
|
xfs_dir2_sf_toino4(args); |
|
else |
|
sfp->i8count--; |
|
} |
|
xfs_dir2_sf_check(args); |
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); |
|
return 0; |
|
} |
|
|
|
/* |
|
* Check whether the sf dir replace operation need more blocks. |
|
*/ |
|
static bool |
|
xfs_dir2_sf_replace_needblock( |
|
struct xfs_inode *dp, |
|
xfs_ino_t inum) |
|
{ |
|
int newsize; |
|
struct xfs_dir2_sf_hdr *sfp; |
|
|
|
if (dp->i_df.if_format != XFS_DINODE_FMT_LOCAL) |
|
return false; |
|
|
|
sfp = (struct xfs_dir2_sf_hdr *)dp->i_df.if_u1.if_data; |
|
newsize = dp->i_df.if_bytes + (sfp->count + 1) * XFS_INO64_DIFF; |
|
|
|
return inum > XFS_DIR2_MAX_SHORT_INUM && |
|
sfp->i8count == 0 && newsize > xfs_inode_data_fork_size(dp); |
|
} |
|
|
|
/* |
|
* Replace the inode number of an entry in a shortform directory. |
|
*/ |
|
int /* error */ |
|
xfs_dir2_sf_replace( |
|
xfs_da_args_t *args) /* operation arguments */ |
|
{ |
|
struct xfs_inode *dp = args->dp; |
|
struct xfs_mount *mp = dp->i_mount; |
|
int i; /* entry index */ |
|
xfs_ino_t ino=0; /* entry old inode number */ |
|
int i8elevated; /* sf_toino8 set i8count=1 */ |
|
xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ |
|
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ |
|
|
|
trace_xfs_dir2_sf_replace(args); |
|
|
|
ASSERT(dp->i_df.if_format == XFS_DINODE_FMT_LOCAL); |
|
ASSERT(dp->i_disk_size >= offsetof(struct xfs_dir2_sf_hdr, parent)); |
|
ASSERT(dp->i_df.if_bytes == dp->i_disk_size); |
|
ASSERT(dp->i_df.if_u1.if_data != NULL); |
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
|
ASSERT(dp->i_disk_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); |
|
|
|
/* |
|
* New inode number is large, and need to convert to 8-byte inodes. |
|
*/ |
|
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { |
|
int error; /* error return value */ |
|
|
|
/* |
|
* Won't fit as shortform, convert to block then do replace. |
|
*/ |
|
if (xfs_dir2_sf_replace_needblock(dp, args->inumber)) { |
|
error = xfs_dir2_sf_to_block(args); |
|
if (error) |
|
return error; |
|
return xfs_dir2_block_replace(args); |
|
} |
|
/* |
|
* Still fits, convert to 8-byte now. |
|
*/ |
|
xfs_dir2_sf_toino8(args); |
|
i8elevated = 1; |
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
|
} else |
|
i8elevated = 0; |
|
|
|
ASSERT(args->namelen != 1 || args->name[0] != '.'); |
|
/* |
|
* Replace ..'s entry. |
|
*/ |
|
if (args->namelen == 2 && |
|
args->name[0] == '.' && args->name[1] == '.') { |
|
ino = xfs_dir2_sf_get_parent_ino(sfp); |
|
ASSERT(args->inumber != ino); |
|
xfs_dir2_sf_put_parent_ino(sfp, args->inumber); |
|
} |
|
/* |
|
* Normal entry, look for the name. |
|
*/ |
|
else { |
|
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; |
|
i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep)) { |
|
if (xfs_da_compname(args, sfep->name, sfep->namelen) == |
|
XFS_CMP_EXACT) { |
|
ino = xfs_dir2_sf_get_ino(mp, sfp, sfep); |
|
ASSERT(args->inumber != ino); |
|
xfs_dir2_sf_put_ino(mp, sfp, sfep, |
|
args->inumber); |
|
xfs_dir2_sf_put_ftype(mp, sfep, args->filetype); |
|
break; |
|
} |
|
} |
|
/* |
|
* Didn't find it. |
|
*/ |
|
if (i == sfp->count) { |
|
ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
|
if (i8elevated) |
|
xfs_dir2_sf_toino4(args); |
|
return -ENOENT; |
|
} |
|
} |
|
/* |
|
* See if the old number was large, the new number is small. |
|
*/ |
|
if (ino > XFS_DIR2_MAX_SHORT_INUM && |
|
args->inumber <= XFS_DIR2_MAX_SHORT_INUM) { |
|
/* |
|
* And the old count was one, so need to convert to small. |
|
*/ |
|
if (sfp->i8count == 1) |
|
xfs_dir2_sf_toino4(args); |
|
else |
|
sfp->i8count--; |
|
} |
|
/* |
|
* See if the old number was small, the new number is large. |
|
*/ |
|
if (ino <= XFS_DIR2_MAX_SHORT_INUM && |
|
args->inumber > XFS_DIR2_MAX_SHORT_INUM) { |
|
/* |
|
* add to the i8count unless we just converted to 8-byte |
|
* inodes (which does an implied i8count = 1) |
|
*/ |
|
ASSERT(sfp->i8count != 0); |
|
if (!i8elevated) |
|
sfp->i8count++; |
|
} |
|
xfs_dir2_sf_check(args); |
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA); |
|
return 0; |
|
} |
|
|
|
/* |
|
* Convert from 8-byte inode numbers to 4-byte inode numbers. |
|
* The last 8-byte inode number is gone, but the count is still 1. |
|
*/ |
|
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 */ |
|
int i; /* entry index */ |
|
int newsize; /* new inode size */ |
|
xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ |
|
xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */ |
|
int oldsize; /* old inode size */ |
|
xfs_dir2_sf_entry_t *sfep; /* new sf entry */ |
|
xfs_dir2_sf_hdr_t *sfp; /* new sf directory */ |
|
|
|
trace_xfs_dir2_sf_toino4(args); |
|
|
|
/* |
|
* Copy the old directory to the buffer. |
|
* Then nuke it from the inode, and add the new buffer to the inode. |
|
* Don't want xfs_idata_realloc copying the data here. |
|
*/ |
|
oldsize = dp->i_df.if_bytes; |
|
buf = kmem_alloc(oldsize, 0); |
|
oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
|
ASSERT(oldsfp->i8count == 1); |
|
memcpy(buf, oldsfp, oldsize); |
|
/* |
|
* Compute the new inode size. |
|
*/ |
|
newsize = oldsize - (oldsfp->count + 1) * XFS_INO64_DIFF; |
|
xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); |
|
xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); |
|
/* |
|
* Reset our pointers, the data has moved. |
|
*/ |
|
oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
|
/* |
|
* Fill in the new header. |
|
*/ |
|
sfp->count = oldsfp->count; |
|
sfp->i8count = 0; |
|
xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_sf_get_parent_ino(oldsfp)); |
|
/* |
|
* Copy the entries field by field. |
|
*/ |
|
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp), |
|
oldsfep = xfs_dir2_sf_firstentry(oldsfp); |
|
i < sfp->count; |
|
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); |
|
xfs_dir2_sf_put_ino(mp, sfp, sfep, |
|
xfs_dir2_sf_get_ino(mp, oldsfp, oldsfep)); |
|
xfs_dir2_sf_put_ftype(mp, sfep, |
|
xfs_dir2_sf_get_ftype(mp, oldsfep)); |
|
} |
|
/* |
|
* Clean up the inode. |
|
*/ |
|
kmem_free(buf); |
|
dp->i_disk_size = newsize; |
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); |
|
} |
|
|
|
/* |
|
* Convert existing entries from 4-byte inode numbers to 8-byte inode numbers. |
|
* The new entry w/ an 8-byte inode number is not there yet; we leave with |
|
* i8count set to 1, but no corresponding 8-byte entry. |
|
*/ |
|
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 */ |
|
int i; /* entry index */ |
|
int newsize; /* new inode size */ |
|
xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */ |
|
xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */ |
|
int oldsize; /* old inode size */ |
|
xfs_dir2_sf_entry_t *sfep; /* new sf entry */ |
|
xfs_dir2_sf_hdr_t *sfp; /* new sf directory */ |
|
|
|
trace_xfs_dir2_sf_toino8(args); |
|
|
|
/* |
|
* Copy the old directory to the buffer. |
|
* Then nuke it from the inode, and add the new buffer to the inode. |
|
* Don't want xfs_idata_realloc copying the data here. |
|
*/ |
|
oldsize = dp->i_df.if_bytes; |
|
buf = kmem_alloc(oldsize, 0); |
|
oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
|
ASSERT(oldsfp->i8count == 0); |
|
memcpy(buf, oldsfp, oldsize); |
|
/* |
|
* Compute the new inode size (nb: entry count + 1 for parent) |
|
*/ |
|
newsize = oldsize + (oldsfp->count + 1) * XFS_INO64_DIFF; |
|
xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK); |
|
xfs_idata_realloc(dp, newsize, XFS_DATA_FORK); |
|
/* |
|
* Reset our pointers, the data has moved. |
|
*/ |
|
oldsfp = (xfs_dir2_sf_hdr_t *)buf; |
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
|
/* |
|
* Fill in the new header. |
|
*/ |
|
sfp->count = oldsfp->count; |
|
sfp->i8count = 1; |
|
xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_sf_get_parent_ino(oldsfp)); |
|
/* |
|
* Copy the entries field by field. |
|
*/ |
|
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp), |
|
oldsfep = xfs_dir2_sf_firstentry(oldsfp); |
|
i < sfp->count; |
|
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); |
|
xfs_dir2_sf_put_ino(mp, sfp, sfep, |
|
xfs_dir2_sf_get_ino(mp, oldsfp, oldsfep)); |
|
xfs_dir2_sf_put_ftype(mp, sfep, |
|
xfs_dir2_sf_get_ftype(mp, oldsfep)); |
|
} |
|
/* |
|
* Clean up the inode. |
|
*/ |
|
kmem_free(buf); |
|
dp->i_disk_size = newsize; |
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); |
|
}
|
|
|