^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * JFFS2 -- Journalling Flash File System, Version 2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright © 2001-2007 Red Hat, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright © 2004-2010 David Woodhouse <dwmw2@infradead.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Created by David Woodhouse <dwmw2@infradead.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * For licensing information, see the file 'LICENCE' in this directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/capability.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/cred.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/fs_context.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/mtd/mtd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/vfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/crc32.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include "nodelist.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static int jffs2_flash_setup(struct jffs2_sb_info *c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct jffs2_full_dnode *old_metadata, *new_metadata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct jffs2_raw_inode *ri;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) union jffs2_device_node dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) unsigned char *mdata = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) int mdatalen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) unsigned int ivalid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) uint32_t alloclen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) int alloc_type = ALLOC_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) jffs2_dbg(1, "%s(): ino #%lu\n", __func__, inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) /* Special cases - we don't want more than one data node
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) for these types on the medium at any time. So setattr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) must read the original data associated with the node
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) (i.e. the device numbers or the target name) and write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) it out again with the appropriate data attached */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) if (S_ISBLK(inode->i_mode) || S_ISCHR(inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) /* For these, we don't actually need to read the old node */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) mdatalen = jffs2_encode_dev(&dev, inode->i_rdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) mdata = (char *)&dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) jffs2_dbg(1, "%s(): Writing %d bytes of kdev_t\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) __func__, mdatalen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) } else if (S_ISLNK(inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) mutex_lock(&f->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) mdatalen = f->metadata->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) mdata = kmalloc(f->metadata->size, GFP_USER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (!mdata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) mutex_unlock(&f->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) ret = jffs2_read_dnode(c, f, f->metadata, mdata, 0, mdatalen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) mutex_unlock(&f->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) kfree(mdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) mutex_unlock(&f->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) jffs2_dbg(1, "%s(): Writing %d bytes of symlink target\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) __func__, mdatalen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) ri = jffs2_alloc_raw_inode();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (!ri) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (S_ISLNK(inode->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) kfree(mdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) ret = jffs2_reserve_space(c, sizeof(*ri) + mdatalen, &alloclen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) jffs2_free_raw_inode(ri);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if (S_ISLNK(inode->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) kfree(mdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) mutex_lock(&f->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) ivalid = iattr->ia_valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) ri->totlen = cpu_to_je32(sizeof(*ri) + mdatalen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) ri->ino = cpu_to_je32(inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) ri->version = cpu_to_je32(++f->highest_version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) ri->uid = cpu_to_je16((ivalid & ATTR_UID)?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) from_kuid(&init_user_ns, iattr->ia_uid):i_uid_read(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) ri->gid = cpu_to_je16((ivalid & ATTR_GID)?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) from_kgid(&init_user_ns, iattr->ia_gid):i_gid_read(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (ivalid & ATTR_MODE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) ri->mode = cpu_to_jemode(iattr->ia_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) ri->mode = cpu_to_jemode(inode->i_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) ri->isize = cpu_to_je32((ivalid & ATTR_SIZE)?iattr->ia_size:inode->i_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) ri->atime = cpu_to_je32(I_SEC((ivalid & ATTR_ATIME)?iattr->ia_atime:inode->i_atime));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) ri->mtime = cpu_to_je32(I_SEC((ivalid & ATTR_MTIME)?iattr->ia_mtime:inode->i_mtime));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) ri->ctime = cpu_to_je32(I_SEC((ivalid & ATTR_CTIME)?iattr->ia_ctime:inode->i_ctime));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) ri->offset = cpu_to_je32(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) ri->csize = ri->dsize = cpu_to_je32(mdatalen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) ri->compr = JFFS2_COMPR_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if (ivalid & ATTR_SIZE && inode->i_size < iattr->ia_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) /* It's an extension. Make it a hole node */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) ri->compr = JFFS2_COMPR_ZERO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) ri->dsize = cpu_to_je32(iattr->ia_size - inode->i_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) ri->offset = cpu_to_je32(inode->i_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) } else if (ivalid & ATTR_SIZE && !iattr->ia_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) /* For truncate-to-zero, treat it as deletion because
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) it'll always be obsoleting all previous nodes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) alloc_type = ALLOC_DELETION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) if (mdatalen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) ri->data_crc = cpu_to_je32(crc32(0, mdata, mdatalen));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) ri->data_crc = cpu_to_je32(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) new_metadata = jffs2_write_dnode(c, f, ri, mdata, mdatalen, alloc_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (S_ISLNK(inode->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) kfree(mdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (IS_ERR(new_metadata)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) jffs2_complete_reservation(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) jffs2_free_raw_inode(ri);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) mutex_unlock(&f->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return PTR_ERR(new_metadata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) /* It worked. Update the inode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) inode->i_atime = ITIME(je32_to_cpu(ri->atime));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) inode->i_ctime = ITIME(je32_to_cpu(ri->ctime));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) inode->i_mtime = ITIME(je32_to_cpu(ri->mtime));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) inode->i_mode = jemode_to_cpu(ri->mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) i_uid_write(inode, je16_to_cpu(ri->uid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) i_gid_write(inode, je16_to_cpu(ri->gid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) old_metadata = f->metadata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) if (ivalid & ATTR_SIZE && inode->i_size > iattr->ia_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) jffs2_truncate_fragtree (c, &f->fragtree, iattr->ia_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if (ivalid & ATTR_SIZE && inode->i_size < iattr->ia_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) jffs2_add_full_dnode_to_inode(c, f, new_metadata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) inode->i_size = iattr->ia_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) inode->i_blocks = (inode->i_size + 511) >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) f->metadata = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) f->metadata = new_metadata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) if (old_metadata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) jffs2_mark_node_obsolete(c, old_metadata->raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) jffs2_free_full_dnode(old_metadata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) jffs2_free_raw_inode(ri);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) mutex_unlock(&f->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) jffs2_complete_reservation(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) /* We have to do the truncate_setsize() without f->sem held, since
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) some pages may be locked and waiting for it in readpage().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) We are protected from a simultaneous write() extending i_size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) back past iattr->ia_size, because do_truncate() holds the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) generic inode semaphore. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (ivalid & ATTR_SIZE && inode->i_size > iattr->ia_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) truncate_setsize(inode, iattr->ia_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) inode->i_blocks = (inode->i_size + 511) >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) int jffs2_setattr(struct dentry *dentry, struct iattr *iattr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) struct inode *inode = d_inode(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) rc = setattr_prepare(dentry, iattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) rc = jffs2_do_setattr(inode, iattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) if (!rc && (iattr->ia_valid & ATTR_MODE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) rc = posix_acl_chmod(inode, inode->i_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) int jffs2_statfs(struct dentry *dentry, struct kstatfs *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) struct jffs2_sb_info *c = JFFS2_SB_INFO(dentry->d_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) unsigned long avail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) buf->f_type = JFFS2_SUPER_MAGIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) buf->f_bsize = 1 << PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) buf->f_blocks = c->flash_size >> PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) buf->f_files = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) buf->f_ffree = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) buf->f_namelen = JFFS2_MAX_NAME_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) buf->f_fsid.val[0] = JFFS2_SUPER_MAGIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) buf->f_fsid.val[1] = c->mtd->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) spin_lock(&c->erase_completion_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) avail = c->dirty_size + c->free_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) if (avail > c->sector_size * c->resv_blocks_write)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) avail -= c->sector_size * c->resv_blocks_write;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) avail = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) spin_unlock(&c->erase_completion_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) buf->f_bavail = buf->f_bfree = avail >> PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) void jffs2_evict_inode (struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) /* We can forget about this inode for now - drop all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) * the nodelists associated with it, etc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) jffs2_dbg(1, "%s(): ino #%lu mode %o\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) __func__, inode->i_ino, inode->i_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) truncate_inode_pages_final(&inode->i_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) clear_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) jffs2_do_clear_inode(c, f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) struct inode *jffs2_iget(struct super_block *sb, unsigned long ino)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) struct jffs2_inode_info *f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) struct jffs2_sb_info *c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) struct jffs2_raw_inode latest_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) union jffs2_device_node jdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) dev_t rdev = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) jffs2_dbg(1, "%s(): ino == %lu\n", __func__, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) inode = iget_locked(sb, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) if (!inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) if (!(inode->i_state & I_NEW))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) return inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) f = JFFS2_INODE_INFO(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) c = JFFS2_SB_INFO(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) jffs2_init_inode_info(f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) mutex_lock(&f->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) ret = jffs2_do_read_inode(c, f, inode->i_ino, &latest_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) inode->i_mode = jemode_to_cpu(latest_node.mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) i_uid_write(inode, je16_to_cpu(latest_node.uid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) i_gid_write(inode, je16_to_cpu(latest_node.gid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) inode->i_size = je32_to_cpu(latest_node.isize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) inode->i_atime = ITIME(je32_to_cpu(latest_node.atime));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) inode->i_mtime = ITIME(je32_to_cpu(latest_node.mtime));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) inode->i_ctime = ITIME(je32_to_cpu(latest_node.ctime));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) set_nlink(inode, f->inocache->pino_nlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) inode->i_blocks = (inode->i_size + 511) >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) switch (inode->i_mode & S_IFMT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) case S_IFLNK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) inode->i_op = &jffs2_symlink_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) inode->i_link = f->target;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) case S_IFDIR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) struct jffs2_full_dirent *fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) set_nlink(inode, 2); /* parent and '.' */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) for (fd=f->dents; fd; fd = fd->next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) if (fd->type == DT_DIR && fd->ino)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) inc_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) /* Root dir gets i_nlink 3 for some reason */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) if (inode->i_ino == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) inc_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) inode->i_op = &jffs2_dir_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) inode->i_fop = &jffs2_dir_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) case S_IFREG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) inode->i_op = &jffs2_file_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) inode->i_fop = &jffs2_file_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) inode->i_mapping->a_ops = &jffs2_file_address_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) inode->i_mapping->nrpages = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) case S_IFBLK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) case S_IFCHR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) /* Read the device numbers from the media */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) if (f->metadata->size != sizeof(jdev.old_id) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) f->metadata->size != sizeof(jdev.new_id)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) pr_notice("Device node has strange size %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) f->metadata->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) goto error_io;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) jffs2_dbg(1, "Reading device numbers from flash\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) ret = jffs2_read_dnode(c, f, f->metadata, (char *)&jdev, 0, f->metadata->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) /* Eep */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) pr_notice("Read device numbers for inode %lu failed\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) (unsigned long)inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) if (f->metadata->size == sizeof(jdev.old_id))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) rdev = old_decode_dev(je16_to_cpu(jdev.old_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) rdev = new_decode_dev(je32_to_cpu(jdev.new_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) case S_IFSOCK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) case S_IFIFO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) inode->i_op = &jffs2_file_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) init_special_inode(inode, inode->i_mode, rdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) pr_warn("%s(): Bogus i_mode %o for ino %lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) __func__, inode->i_mode, (unsigned long)inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) mutex_unlock(&f->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) jffs2_dbg(1, "jffs2_read_inode() returning\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) unlock_new_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) return inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) error_io:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) mutex_unlock(&f->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) iget_failed(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) return ERR_PTR(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) void jffs2_dirty_inode(struct inode *inode, int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) struct iattr iattr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) if (!(inode->i_state & I_DIRTY_DATASYNC)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) jffs2_dbg(2, "%s(): not calling setattr() for ino #%lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) __func__, inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) jffs2_dbg(1, "%s(): calling setattr() for ino #%lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) __func__, inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) iattr.ia_valid = ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_MTIME|ATTR_CTIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) iattr.ia_mode = inode->i_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) iattr.ia_uid = inode->i_uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) iattr.ia_gid = inode->i_gid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) iattr.ia_atime = inode->i_atime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) iattr.ia_mtime = inode->i_mtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) iattr.ia_ctime = inode->i_ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) jffs2_do_setattr(inode, &iattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) int jffs2_do_remount_fs(struct super_block *sb, struct fs_context *fc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) if (c->flags & JFFS2_SB_FLAG_RO && !sb_rdonly(sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) return -EROFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) /* We stop if it was running, then restart if it needs to.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) This also catches the case where it was stopped and this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) is just a remount to restart it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) Flush the writebuffer, if neccecary, else we loose it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) if (!sb_rdonly(sb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) jffs2_stop_garbage_collect_thread(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) mutex_lock(&c->alloc_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) jffs2_flush_wbuf_pad(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) mutex_unlock(&c->alloc_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) if (!(fc->sb_flags & SB_RDONLY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) jffs2_start_garbage_collect_thread(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) fc->sb_flags |= SB_NOATIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) /* jffs2_new_inode: allocate a new inode and inocache, add it to the hash,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) fill in the raw_inode while you're at it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) struct inode *jffs2_new_inode (struct inode *dir_i, umode_t mode, struct jffs2_raw_inode *ri)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) struct super_block *sb = dir_i->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) struct jffs2_sb_info *c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) struct jffs2_inode_info *f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) jffs2_dbg(1, "%s(): dir_i %ld, mode 0x%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) __func__, dir_i->i_ino, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) c = JFFS2_SB_INFO(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) inode = new_inode(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) if (!inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) f = JFFS2_INODE_INFO(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) jffs2_init_inode_info(f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) mutex_lock(&f->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) memset(ri, 0, sizeof(*ri));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) /* Set OS-specific defaults for new inodes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) ri->uid = cpu_to_je16(from_kuid(&init_user_ns, current_fsuid()));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) if (dir_i->i_mode & S_ISGID) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) ri->gid = cpu_to_je16(i_gid_read(dir_i));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) if (S_ISDIR(mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) mode |= S_ISGID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) ri->gid = cpu_to_je16(from_kgid(&init_user_ns, current_fsgid()));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) /* POSIX ACLs have to be processed now, at least partly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) The umask is only applied if there's no default ACL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) ret = jffs2_init_acl_pre(dir_i, inode, &mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) mutex_unlock(&f->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) make_bad_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) return ERR_PTR(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) ret = jffs2_do_new_inode (c, f, mode, ri);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) mutex_unlock(&f->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) make_bad_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) return ERR_PTR(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) set_nlink(inode, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) inode->i_ino = je32_to_cpu(ri->ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) inode->i_mode = jemode_to_cpu(ri->mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) i_gid_write(inode, je16_to_cpu(ri->gid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) i_uid_write(inode, je16_to_cpu(ri->uid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) inode->i_atime = inode->i_ctime = inode->i_mtime = current_time(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) ri->atime = ri->mtime = ri->ctime = cpu_to_je32(I_SEC(inode->i_mtime));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) inode->i_blocks = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) inode->i_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) if (insert_inode_locked(inode) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) mutex_unlock(&f->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) make_bad_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) return inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) static int calculate_inocache_hashsize(uint32_t flash_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) * Pick a inocache hash size based on the size of the medium.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) * Count how many megabytes we're dealing with, apply a hashsize twice
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) * that size, but rounding down to the usual big powers of 2. And keep
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) * to sensible bounds.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) int size_mb = flash_size / 1024 / 1024;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) int hashsize = (size_mb * 2) & ~0x3f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) if (hashsize < INOCACHE_HASHSIZE_MIN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) return INOCACHE_HASHSIZE_MIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) if (hashsize > INOCACHE_HASHSIZE_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) return INOCACHE_HASHSIZE_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) return hashsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) int jffs2_do_fill_super(struct super_block *sb, struct fs_context *fc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) struct jffs2_sb_info *c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) struct inode *root_i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) size_t blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) c = JFFS2_SB_INFO(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) /* Do not support the MLC nand */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) if (c->mtd->type == MTD_MLCNANDFLASH)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) #ifndef CONFIG_JFFS2_FS_WRITEBUFFER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) if (c->mtd->type == MTD_NANDFLASH) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) errorf(fc, "Cannot operate on NAND flash unless jffs2 NAND support is compiled in");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) if (c->mtd->type == MTD_DATAFLASH) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) errorf(fc, "Cannot operate on DataFlash unless jffs2 DataFlash support is compiled in");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) c->flash_size = c->mtd->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) c->sector_size = c->mtd->erasesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) blocks = c->flash_size / c->sector_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) * Size alignment check
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) if ((c->sector_size * blocks) != c->flash_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) c->flash_size = c->sector_size * blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) infof(fc, "Flash size not aligned to erasesize, reducing to %dKiB",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) c->flash_size / 1024);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) if (c->flash_size < 5*c->sector_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) errorf(fc, "Too few erase blocks (%d)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) c->flash_size / c->sector_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) c->cleanmarker_size = sizeof(struct jffs2_unknown_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) /* NAND (or other bizarre) flash... do setup accordingly */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) ret = jffs2_flash_setup(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) c->inocache_hashsize = calculate_inocache_hashsize(c->flash_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) c->inocache_list = kcalloc(c->inocache_hashsize, sizeof(struct jffs2_inode_cache *), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) if (!c->inocache_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) goto out_wbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) jffs2_init_xattr_subsystem(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) if ((ret = jffs2_do_mount_fs(c)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) goto out_inohash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) jffs2_dbg(1, "%s(): Getting root inode\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) root_i = jffs2_iget(sb, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) if (IS_ERR(root_i)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) jffs2_dbg(1, "get root inode failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) ret = PTR_ERR(root_i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) goto out_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) jffs2_dbg(1, "%s(): d_make_root()\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) sb->s_root = d_make_root(root_i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) if (!sb->s_root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) goto out_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) sb->s_maxbytes = 0xFFFFFFFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) sb->s_blocksize = PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) sb->s_blocksize_bits = PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) sb->s_magic = JFFS2_SUPER_MAGIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) sb->s_time_min = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) sb->s_time_max = U32_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) if (!sb_rdonly(sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) jffs2_start_garbage_collect_thread(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) out_root:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) jffs2_free_ino_caches(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) jffs2_free_raw_node_refs(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) kvfree(c->blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) jffs2_clear_xattr_subsystem(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) out_inohash:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) kfree(c->inocache_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) out_wbuf:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) jffs2_flash_cleanup(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) void jffs2_gc_release_inode(struct jffs2_sb_info *c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) struct jffs2_inode_info *f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) iput(OFNI_EDONI_2SFFJ(f));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) int inum, int unlinked)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) struct jffs2_inode_cache *ic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) if (unlinked) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) /* The inode has zero nlink but its nodes weren't yet marked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) obsolete. This has to be because we're still waiting for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) the final (close() and) iput() to happen.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) There's a possibility that the final iput() could have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) happened while we were contemplating. In order to ensure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) that we don't cause a new read_inode() (which would fail)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) for the inode in question, we use ilookup() in this case
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) instead of iget().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) The nlink can't _become_ zero at this point because we're
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) holding the alloc_sem, and jffs2_do_unlink() would also
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) need that while decrementing nlink on any inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) inode = ilookup(OFNI_BS_2SFFJ(c), inum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) if (!inode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) jffs2_dbg(1, "ilookup() failed for ino #%u; inode is probably deleted.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) inum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) spin_lock(&c->inocache_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) ic = jffs2_get_ino_cache(c, inum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) if (!ic) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) jffs2_dbg(1, "Inode cache for ino #%u is gone\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) inum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) spin_unlock(&c->inocache_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) if (ic->state != INO_STATE_CHECKEDABSENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) /* Wait for progress. Don't just loop */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) jffs2_dbg(1, "Waiting for ino #%u in state %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) ic->ino, ic->state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) sleep_on_spinunlock(&c->inocache_wq, &c->inocache_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) spin_unlock(&c->inocache_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) /* Inode has links to it still; they're not going away because
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) jffs2_do_unlink() would need the alloc_sem and we have it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) Just iget() it, and if read_inode() is necessary that's OK.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) inode = jffs2_iget(OFNI_BS_2SFFJ(c), inum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) if (IS_ERR(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) return ERR_CAST(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) if (is_bad_inode(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) pr_notice("Eep. read_inode() failed for ino #%u. unlinked %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) inum, unlinked);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) /* NB. This will happen again. We need to do something appropriate here. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) return ERR_PTR(-EIO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) return JFFS2_INODE_INFO(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) static int jffs2_flash_setup(struct jffs2_sb_info *c) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) if (jffs2_cleanmarker_oob(c)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) /* NAND flash... do setup accordingly */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) ret = jffs2_nand_flash_setup(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) /* and Dataflash */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) if (jffs2_dataflash(c)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) ret = jffs2_dataflash_setup(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) /* and Intel "Sibley" flash */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) if (jffs2_nor_wbuf_flash(c)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) ret = jffs2_nor_wbuf_flash_setup(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) /* and an UBI volume */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) if (jffs2_ubivol(c)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) ret = jffs2_ubivol_setup(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) void jffs2_flash_cleanup(struct jffs2_sb_info *c) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) if (jffs2_cleanmarker_oob(c)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) jffs2_nand_flash_cleanup(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) /* and DataFlash */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) if (jffs2_dataflash(c)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) jffs2_dataflash_cleanup(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) /* and Intel "Sibley" flash */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) if (jffs2_nor_wbuf_flash(c)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) jffs2_nor_wbuf_flash_cleanup(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) /* and an UBI volume */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) if (jffs2_ubivol(c)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) jffs2_ubivol_cleanup(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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